| 1 | /* |
|---|---|
| 2 | * Copyright (c) 2013-2022 Apple Inc. All rights reserved. |
| 3 | * |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| 5 | * |
| 6 | * This file contains Original Code and/or Modifications of Original Code |
| 7 | * as defined in and that are subject to the Apple Public Source License |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| 9 | * compliance with the License. The rights granted to you under the License |
| 10 | * may not be used to create, or enable the creation or redistribution of, |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any |
| 13 | * terms of an Apple operating system software license agreement. |
| 14 | * |
| 15 | * Please obtain a copy of the License at |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| 17 | * |
| 18 | * The Original Code and all software distributed under the License are |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 23 | * Please see the License for the specific language governing rights and |
| 24 | * limitations under the License. |
| 25 | * |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| 27 | */ |
| 28 | |
| 29 | #include <string.h> |
| 30 | #include <sys/systm.h> |
| 31 | #include <sys/types.h> |
| 32 | #include <sys/queue.h> |
| 33 | #include <sys/malloc.h> |
| 34 | #include <sys/kernel.h> |
| 35 | #include <sys/kern_control.h> |
| 36 | #include <sys/mbuf.h> |
| 37 | #include <sys/kpi_mbuf.h> |
| 38 | #include <sys/proc_uuid_policy.h> |
| 39 | #include <net/if.h> |
| 40 | #include <sys/domain.h> |
| 41 | #include <sys/protosw.h> |
| 42 | #include <sys/socket.h> |
| 43 | #include <sys/socketvar.h> |
| 44 | #include <sys/coalition.h> |
| 45 | #include <sys/ubc.h> |
| 46 | #include <sys/codesign.h> |
| 47 | #include <kern/cs_blobs.h> |
| 48 | #include <netinet/ip.h> |
| 49 | #include <netinet/ip6.h> |
| 50 | #include <netinet/tcp.h> |
| 51 | #include <netinet/tcp_var.h> |
| 52 | #include <netinet/tcp_cache.h> |
| 53 | #include <netinet/udp.h> |
| 54 | #include <netinet/in_pcb.h> |
| 55 | #include <netinet/in_tclass.h> |
| 56 | #include <netinet6/esp.h> |
| 57 | #include <net/flowhash.h> |
| 58 | #include <net/bloom_filter.h> |
| 59 | #include <net/if_var.h> |
| 60 | #include <net/pfvar.h> |
| 61 | #if SKYWALK && defined(XNU_TARGET_OS_OSX) |
| 62 | #include <skywalk/lib/net_filter_event.h> |
| 63 | #endif /* defined(SKYWALK) && defined(XNU_TARGET_OS_OSX) */ |
| 64 | #include <sys/kauth.h> |
| 65 | #include <sys/sysctl.h> |
| 66 | #include <sys/sysproto.h> |
| 67 | #include <sys/priv.h> |
| 68 | #include <sys/kern_event.h> |
| 69 | #include <sys/file_internal.h> |
| 70 | #include <IOKit/IOBSD.h> |
| 71 | #include <libkern/crypto/rand.h> |
| 72 | #include <corecrypto/cchmac.h> |
| 73 | #include <corecrypto/ccsha2.h> |
| 74 | #include <os/refcnt.h> |
| 75 | #include <mach-o/loader.h> |
| 76 | #include <net/network_agent.h> |
| 77 | #include <net/necp.h> |
| 78 | #include <netinet/flow_divert_proto.h> |
| 79 | |
| 80 | /* |
| 81 | * NECP - Network Extension Control Policy database |
| 82 | * ------------------------------------------------ |
| 83 | * The goal of this module is to allow clients connecting via a |
| 84 | * policy file descriptor to create high-level policy sessions, which |
| 85 | * are ingested into low-level kernel policies that control and tag |
| 86 | * traffic at the application, socket, and IP layers. |
| 87 | * |
| 88 | * ------------------------------------------------ |
| 89 | * Sessions |
| 90 | * ------------------------------------------------ |
| 91 | * Each session owns a list of session policies, each of which can |
| 92 | * specify any combination of conditions and a single result. Each |
| 93 | * session also has a priority level (such as High, Default, or Low) |
| 94 | * which is requested by the client. Based on the requested level, |
| 95 | * a session order value is assigned to the session, which will be used |
| 96 | * to sort kernel policies generated by the session. The session client |
| 97 | * can specify the sub-order for each policy it creates which will be |
| 98 | * used to further sort the kernel policies. |
| 99 | * |
| 100 | * Policy fd --> 1 necp_session --> list of necp_session_policy structs |
| 101 | * |
| 102 | * ------------------------------------------------ |
| 103 | * Kernel Policies |
| 104 | * ------------------------------------------------ |
| 105 | * Whenever a session send the Apply command, its policies are ingested |
| 106 | * and generate kernel policies. There are two phases of kernel policy |
| 107 | * ingestion. |
| 108 | * |
| 109 | * 1. The session policy is parsed to create kernel policies at the socket |
| 110 | * and IP layers, when applicable. For example, a policy that requires |
| 111 | * all traffic from App1 to Pass will generate a socket kernel policy to |
| 112 | * match App1 and mark packets with ID1, and also an IP policy to match |
| 113 | * ID1 and let the packet pass. This is handled in necp_apply_policy. The |
| 114 | * resulting kernel policies are added to the global socket and IP layer |
| 115 | * policy lists. |
| 116 | * necp_session_policy --> necp_kernel_socket_policy and necp_kernel_ip_output_policy |
| 117 | * || || |
| 118 | * \/ \/ |
| 119 | * necp_kernel_socket_policies necp_kernel_ip_output_policies |
| 120 | * |
| 121 | * 2. Once the global lists of kernel policies have been filled out, each |
| 122 | * list is traversed to create optimized sub-lists ("Maps") which are used during |
| 123 | * data-path evaluation. IP policies are sent into necp_kernel_ip_output_policies_map, |
| 124 | * which hashes incoming packets based on marked socket-layer policies, and removes |
| 125 | * duplicate or overlapping policies. Socket policies are sent into two maps, |
| 126 | * necp_kernel_socket_policies_map and necp_kernel_socket_policies_app_layer_map. |
| 127 | * The app layer map is used for policy checks coming in from user space, and is one |
| 128 | * list with duplicate and overlapping policies removed. The socket map hashes based |
| 129 | * on app UUID, and removes duplicate and overlapping policies. |
| 130 | * necp_kernel_socket_policy --> necp_kernel_socket_policies_app_layer_map |
| 131 | * |-> necp_kernel_socket_policies_map |
| 132 | * |
| 133 | * necp_kernel_ip_output_policies --> necp_kernel_ip_output_policies_map |
| 134 | * |
| 135 | * ------------------------------------------------ |
| 136 | * Drop All Level |
| 137 | * ------------------------------------------------ |
| 138 | * The Drop All Level is a sysctl that controls the level at which policies are allowed |
| 139 | * to override a global drop rule. If the value is 0, no drop rule is applied. If the value |
| 140 | * is 1, all traffic is dropped. If the value is greater than 1, all kernel policies created |
| 141 | * by a session with a priority level better than (numerically less than) the |
| 142 | * Drop All Level will allow matching traffic to not be dropped. The Drop All Level is |
| 143 | * dynamically interpreted into necp_drop_all_order, which specifies the equivalent assigned |
| 144 | * session orders to be dropped. |
| 145 | */ |
| 146 | |
| 147 | u_int32_t necp_drop_all_order = 0; |
| 148 | u_int32_t necp_drop_all_level = 0; |
| 149 | |
| 150 | u_int32_t necp_pass_loopback = NECP_LOOPBACK_PASS_ALL; |
| 151 | u_int32_t necp_pass_keepalives = 1; // 0=Off, 1=On |
| 152 | u_int32_t necp_pass_interpose = 1; // 0=Off, 1=On |
| 153 | u_int32_t necp_restrict_multicast = 1; // 0=Off, 1=On |
| 154 | u_int32_t necp_dedup_policies = 0; // 0=Off, 1=On |
| 155 | |
| 156 | u_int32_t necp_drop_unentitled_order = 0; |
| 157 | #ifdef XNU_TARGET_OS_WATCH |
| 158 | u_int32_t necp_drop_unentitled_level = NECP_SESSION_PRIORITY_CONTROL + 1; // Block all unentitled traffic from policies below control level |
| 159 | #else // XNU_TARGET_OS_WATCH |
| 160 | u_int32_t necp_drop_unentitled_level = 0; |
| 161 | #endif // XNU_TARGET_OS_WATCH |
| 162 | |
| 163 | u_int32_t necp_drop_management_order = 0; |
| 164 | u_int32_t necp_drop_management_level = NECP_SESSION_PRIORITY_PRIVILEGED_TUNNEL; |
| 165 | |
| 166 | u_int32_t necp_debug = 0; // 0=None, 1=Basic, 2=EveryMatch |
| 167 | |
| 168 | os_log_t necp_log_handle = NULL; |
| 169 | os_log_t necp_data_trace_log_handle = NULL; |
| 170 | |
| 171 | u_int32_t necp_session_count = 0; |
| 172 | |
| 173 | static KALLOC_TYPE_DEFINE(necp_session_policy_zone, |
| 174 | struct necp_session_policy, NET_KT_DEFAULT); |
| 175 | static KALLOC_TYPE_DEFINE(necp_socket_policy_zone, |
| 176 | struct necp_kernel_socket_policy, NET_KT_DEFAULT); |
| 177 | static KALLOC_TYPE_DEFINE(necp_ip_policy_zone, |
| 178 | struct necp_kernel_ip_output_policy, NET_KT_DEFAULT); |
| 179 | |
| 180 | #define LIST_INSERT_SORTED_ASCENDING(head, elm, field, sortfield, tmpelm) do { \ |
| 181 | if (LIST_EMPTY((head)) || (LIST_FIRST(head)->sortfield >= (elm)->sortfield)) { \ |
| 182 | LIST_INSERT_HEAD((head), elm, field); \ |
| 183 | } else { \ |
| 184 | LIST_FOREACH(tmpelm, head, field) { \ |
| 185 | if (LIST_NEXT(tmpelm, field) == NULL || LIST_NEXT(tmpelm, field)->sortfield >= (elm)->sortfield) { \ |
| 186 | LIST_INSERT_AFTER(tmpelm, elm, field); \ |
| 187 | break; \ |
| 188 | } \ |
| 189 | } \ |
| 190 | } \ |
| 191 | } while (0) |
| 192 | |
| 193 | #define LIST_INSERT_SORTED_TWICE_ASCENDING(head, elm, field, firstsortfield, secondsortfield, tmpelm) do { \ |
| 194 | if (LIST_EMPTY((head)) || (LIST_FIRST(head)->firstsortfield > (elm)->firstsortfield) || ((LIST_FIRST(head)->firstsortfield == (elm)->firstsortfield) && (LIST_FIRST(head)->secondsortfield >= (elm)->secondsortfield))) { \ |
| 195 | LIST_INSERT_HEAD((head), elm, field); \ |
| 196 | } else { \ |
| 197 | LIST_FOREACH(tmpelm, head, field) { \ |
| 198 | if (LIST_NEXT(tmpelm, field) == NULL || (LIST_NEXT(tmpelm, field)->firstsortfield > (elm)->firstsortfield) || ((LIST_NEXT(tmpelm, field)->firstsortfield == (elm)->firstsortfield) && (LIST_NEXT(tmpelm, field)->secondsortfield >= (elm)->secondsortfield))) { \ |
| 199 | LIST_INSERT_AFTER(tmpelm, elm, field); \ |
| 200 | break; \ |
| 201 | } \ |
| 202 | } \ |
| 203 | } \ |
| 204 | } while (0) |
| 205 | |
| 206 | #define LIST_INSERT_SORTED_THRICE_ASCENDING(head, elm, field, firstsortfield, secondsortfield, thirdsortfield, tmpelm) do { \ |
| 207 | if (LIST_EMPTY((head)) || (LIST_FIRST(head)->firstsortfield > (elm)->firstsortfield) || ((LIST_FIRST(head)->firstsortfield == (elm)->firstsortfield) && (LIST_FIRST(head)->secondsortfield >= (elm)->secondsortfield)) || ((LIST_FIRST(head)->firstsortfield == (elm)->firstsortfield) && (LIST_FIRST(head)->secondsortfield == (elm)->secondsortfield) && (LIST_FIRST(head)->thirdsortfield >= (elm)->thirdsortfield))) { \ |
| 208 | LIST_INSERT_HEAD((head), elm, field); \ |
| 209 | } else { \ |
| 210 | LIST_FOREACH(tmpelm, head, field) { \ |
| 211 | if (LIST_NEXT(tmpelm, field) == NULL || (LIST_NEXT(tmpelm, field)->firstsortfield > (elm)->firstsortfield) || ((LIST_NEXT(tmpelm, field)->firstsortfield == (elm)->firstsortfield) && (LIST_NEXT(tmpelm, field)->secondsortfield >= (elm)->secondsortfield)) || ((LIST_NEXT(tmpelm, field)->firstsortfield == (elm)->firstsortfield) && (LIST_NEXT(tmpelm, field)->secondsortfield == (elm)->secondsortfield) && (LIST_NEXT(tmpelm, field)->thirdsortfield >= (elm)->thirdsortfield))) { \ |
| 212 | LIST_INSERT_AFTER(tmpelm, elm, field); \ |
| 213 | break; \ |
| 214 | } \ |
| 215 | } \ |
| 216 | } \ |
| 217 | } while (0) |
| 218 | |
| 219 | #define IS_NECP_ROUTE_RULE_DENY(x) ((x) == NECP_ROUTE_RULE_DENY_INTERFACE || (x) == NECP_ROUTE_RULE_DENY_INTERFACE_WITH_TYPE) |
| 220 | |
| 221 | #define IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(x) (IS_NECP_ROUTE_RULE_DENY(x) || (x) == NECP_ROUTE_RULE_ALLOW_INTERFACE) |
| 222 | |
| 223 | #define IS_NECP_DEST_IN_LOCAL_NETWORKS(rt) \ |
| 224 | ((rt) != NULL && !((rt)->rt_flags & RTF_GATEWAY) && ((rt)->rt_ifa && (rt)->rt_ifa->ifa_ifp && !((rt)->rt_ifa->ifa_ifp->if_flags & IFF_POINTOPOINT))) |
| 225 | |
| 226 | #define NECP_KERNEL_CONDITION_ALL_INTERFACES 0x000001 |
| 227 | #define NECP_KERNEL_CONDITION_BOUND_INTERFACE 0x000002 |
| 228 | #define NECP_KERNEL_CONDITION_PROTOCOL 0x000004 |
| 229 | #define NECP_KERNEL_CONDITION_LOCAL_START 0x000008 |
| 230 | #define NECP_KERNEL_CONDITION_LOCAL_END 0x000010 |
| 231 | #define NECP_KERNEL_CONDITION_LOCAL_PREFIX 0x000020 |
| 232 | #define NECP_KERNEL_CONDITION_REMOTE_START 0x000040 |
| 233 | #define NECP_KERNEL_CONDITION_REMOTE_END 0x000080 |
| 234 | #define NECP_KERNEL_CONDITION_REMOTE_PREFIX 0x000100 |
| 235 | #define NECP_KERNEL_CONDITION_APP_ID 0x000200 |
| 236 | #define NECP_KERNEL_CONDITION_REAL_APP_ID 0x000400 |
| 237 | #define NECP_KERNEL_CONDITION_DOMAIN 0x000800 |
| 238 | #define NECP_KERNEL_CONDITION_ACCOUNT_ID 0x001000 |
| 239 | #define NECP_KERNEL_CONDITION_POLICY_ID 0x002000 |
| 240 | #define NECP_KERNEL_CONDITION_PID 0x004000 |
| 241 | #define NECP_KERNEL_CONDITION_UID 0x008000 |
| 242 | #define NECP_KERNEL_CONDITION_LAST_INTERFACE 0x010000 // Only set from packets looping between interfaces |
| 243 | #define NECP_KERNEL_CONDITION_TRAFFIC_CLASS 0x020000 |
| 244 | #define NECP_KERNEL_CONDITION_ENTITLEMENT 0x040000 |
| 245 | #define NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT 0x080000 |
| 246 | #define NECP_KERNEL_CONDITION_AGENT_TYPE 0x100000 |
| 247 | #define NECP_KERNEL_CONDITION_HAS_CLIENT 0x200000 |
| 248 | #define NECP_KERNEL_CONDITION_LOCAL_NETWORKS 0x400000 |
| 249 | #define NECP_KERNEL_CONDITION_CLIENT_FLAGS 0x800000 |
| 250 | #define NECP_KERNEL_CONDITION_LOCAL_EMPTY 0x1000000 |
| 251 | #define NECP_KERNEL_CONDITION_REMOTE_EMPTY 0x2000000 |
| 252 | #define NECP_KERNEL_CONDITION_PLATFORM_BINARY 0x4000000 |
| 253 | #define NECP_KERNEL_CONDITION_SDK_VERSION 0x8000000 |
| 254 | #define NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER 0x10000000 |
| 255 | #define NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS 0x20000000 |
| 256 | #define NECP_KERNEL_CONDITION_IS_LOOPBACK 0x40000000 |
| 257 | #define NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY 0x80000000 |
| 258 | #define NECP_KERNEL_CONDITION_SCHEME_PORT 0x100000000 |
| 259 | #define NECP_KERNEL_CONDITION_DOMAIN_FILTER 0x200000000 |
| 260 | #define NECP_KERNEL_CONDITION_SYSTEM_SIGNED_RESULT 0x400000000 |
| 261 | #define NECP_KERNEL_CONDITION_EXACT_DOMAIN 0x800000000 |
| 262 | #define NECP_KERNEL_CONDITION_REAL_UID 0x1000000000 |
| 263 | #define NECP_KERNEL_CONDITION_URL 0x2000000000 |
| 264 | #define NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS 0x4000000000 |
| 265 | |
| 266 | #define NECP_MAX_POLICY_RESULT_SIZE 512 |
| 267 | #define NECP_MAX_ROUTE_RULES_ARRAY_SIZE 1024 |
| 268 | #define NECP_MAX_CONDITIONS_ARRAY_SIZE 4096 |
| 269 | #define NECP_MAX_POLICY_LIST_COUNT 1024 |
| 270 | |
| 271 | #define NECP_MAX_DOMAIN_FILTER_SIZE 65536 // Allows room for 100K domains |
| 272 | |
| 273 | typedef enum { |
| 274 | NECP_BYPASS_TYPE_NONE = 0, |
| 275 | NECP_BYPASS_TYPE_INTCOPROC = 1, |
| 276 | NECP_BYPASS_TYPE_LOOPBACK = 2, |
| 277 | } necp_socket_bypass_type_t; |
| 278 | |
| 279 | // Cap the policy size at the max result + conditions size, with room for extra TLVs |
| 280 | #define NECP_MAX_POLICY_SIZE (1024 + NECP_MAX_POLICY_RESULT_SIZE + NECP_MAX_CONDITIONS_ARRAY_SIZE) |
| 281 | |
| 282 | struct necp_service_registration { |
| 283 | LIST_ENTRY(necp_service_registration) session_chain; |
| 284 | LIST_ENTRY(necp_service_registration) kernel_chain; |
| 285 | u_int32_t service_id; |
| 286 | }; |
| 287 | |
| 288 | struct necp_domain_filter { |
| 289 | LIST_ENTRY(necp_domain_filter) owner_chain; |
| 290 | LIST_ENTRY(necp_domain_filter) chain; |
| 291 | u_int32_t id; |
| 292 | struct net_bloom_filter *filter; |
| 293 | os_refcnt_t refcount; |
| 294 | }; |
| 295 | static LIST_HEAD(necp_domain_filter_list, necp_domain_filter) necp_global_domain_filter_list; |
| 296 | |
| 297 | struct necp_session { |
| 298 | u_int8_t necp_fd_type; |
| 299 | u_int32_t control_unit; |
| 300 | u_int32_t session_priority; // Descriptive priority rating |
| 301 | u_int32_t session_order; |
| 302 | |
| 303 | necp_policy_id last_policy_id; |
| 304 | |
| 305 | decl_lck_mtx_data(, lock); |
| 306 | |
| 307 | bool proc_locked; // Messages must come from proc_uuid |
| 308 | uuid_t proc_uuid; |
| 309 | int proc_pid; |
| 310 | |
| 311 | bool dirty; |
| 312 | LIST_HEAD(_policies, necp_session_policy) policies; |
| 313 | |
| 314 | LIST_HEAD(_services, necp_service_registration) services; |
| 315 | struct necp_domain_filter_list domain_filters; |
| 316 | |
| 317 | TAILQ_ENTRY(necp_session) chain; |
| 318 | }; |
| 319 | |
| 320 | #define NECP_SESSION_LOCK(_s) lck_mtx_lock(&_s->lock) |
| 321 | #define NECP_SESSION_UNLOCK(_s) lck_mtx_unlock(&_s->lock) |
| 322 | |
| 323 | static TAILQ_HEAD(_necp_session_list, necp_session) necp_session_list; |
| 324 | |
| 325 | struct necp_socket_info { |
| 326 | pid_t pid; |
| 327 | int32_t pid_version; |
| 328 | uid_t uid; |
| 329 | uid_t real_uid; |
| 330 | union necp_sockaddr_union local_addr; |
| 331 | union necp_sockaddr_union remote_addr; |
| 332 | u_int32_t bound_interface_index; |
| 333 | u_int32_t bound_interface_flags; |
| 334 | u_int32_t bound_interface_eflags; |
| 335 | u_int32_t bound_interface_xflags; |
| 336 | u_int32_t traffic_class; |
| 337 | u_int16_t protocol; |
| 338 | u_int16_t scheme_port; |
| 339 | u_int32_t application_id; |
| 340 | u_int32_t real_application_id; |
| 341 | u_int32_t account_id; |
| 342 | u_int32_t drop_order; |
| 343 | u_int32_t client_flags; |
| 344 | char *domain; |
| 345 | char *url; |
| 346 | unsigned is_entitled : 1; |
| 347 | unsigned has_client : 1; |
| 348 | unsigned has_system_signed_result : 1; |
| 349 | unsigned is_platform_binary : 1; |
| 350 | unsigned used_responsible_pid : 1; |
| 351 | unsigned is_loopback : 1; |
| 352 | unsigned real_is_platform_binary : 1; |
| 353 | unsigned is_delegated : 1; |
| 354 | unsigned is_local : 1; |
| 355 | unsigned __pad_bits : 7; |
| 356 | }; |
| 357 | |
| 358 | static LCK_GRP_DECLARE(necp_kernel_policy_mtx_grp, NECP_CONTROL_NAME); |
| 359 | static LCK_ATTR_DECLARE(necp_kernel_policy_mtx_attr, 0, 0); |
| 360 | static LCK_RW_DECLARE_ATTR(necp_kernel_policy_lock, &necp_kernel_policy_mtx_grp, |
| 361 | &necp_kernel_policy_mtx_attr); |
| 362 | |
| 363 | static LCK_GRP_DECLARE(necp_route_rule_mtx_grp, "necp_route_rule"); |
| 364 | static LCK_RW_DECLARE(necp_route_rule_lock, &necp_route_rule_mtx_grp); |
| 365 | |
| 366 | os_refgrp_decl(static, necp_refgrp, "NECPRefGroup", NULL); |
| 367 | |
| 368 | /* |
| 369 | * On modification, invalidate cached lookups by bumping the generation count. |
| 370 | * Other calls will need to take the slowpath of taking |
| 371 | * the subsystem lock. |
| 372 | */ |
| 373 | static volatile int32_t necp_kernel_socket_policies_gencount; |
| 374 | #define BUMP_KERNEL_SOCKET_POLICIES_GENERATION_COUNT() do { \ |
| 375 | if (OSIncrementAtomic(&necp_kernel_socket_policies_gencount) == (INT32_MAX - 1)) { \ |
| 376 | necp_kernel_socket_policies_gencount = 1; \ |
| 377 | } \ |
| 378 | } while (0) |
| 379 | |
| 380 | /* |
| 381 | * Drop-all Bypass: |
| 382 | * Allow priviledged processes to bypass the default drop-all |
| 383 | * via entitlement check. For OSX, since entitlement check is |
| 384 | * not supported for configd, configd signing identity is checked |
| 385 | * instead. |
| 386 | */ |
| 387 | #define SIGNING_ID_CONFIGD "com.apple.configd" |
| 388 | #define SIGNING_ID_CONFIGD_LEN (sizeof(SIGNING_ID_CONFIGD) - 1) |
| 389 | |
| 390 | typedef enum { |
| 391 | NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE = 0, |
| 392 | NECP_DROP_ALL_BYPASS_CHECK_RESULT_TRUE = 1, |
| 393 | NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE = 2, |
| 394 | } necp_drop_all_bypass_check_result_t; |
| 395 | |
| 396 | static u_int64_t necp_kernel_application_policies_condition_mask; |
| 397 | static size_t necp_kernel_application_policies_count; |
| 398 | static u_int64_t necp_kernel_socket_policies_condition_mask; |
| 399 | static size_t necp_kernel_socket_policies_count; |
| 400 | static size_t necp_kernel_socket_policies_non_app_count; |
| 401 | static LIST_HEAD(_necpkernelsocketconnectpolicies, necp_kernel_socket_policy) necp_kernel_socket_policies; |
| 402 | #define NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS 5 |
| 403 | #define NECP_SOCKET_MAP_APP_ID_TO_BUCKET(appid) (appid ? (appid%(NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS - 1) + 1) : 0) |
| 404 | static size_t necp_kernel_socket_policies_map_counts[NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS]; |
| 405 | static struct necp_kernel_socket_policy **necp_kernel_socket_policies_map[NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS]; |
| 406 | static size_t necp_kernel_socket_policies_app_layer_map_count; |
| 407 | static struct necp_kernel_socket_policy **necp_kernel_socket_policies_app_layer_map; |
| 408 | /* |
| 409 | * A note on policy 'maps': these are used for boosting efficiency when matching policies. For each dimension of the map, |
| 410 | * such as an ID, the 0 bucket is reserved for sockets/packets that do not have this parameter, while the other |
| 411 | * buckets lead to an array of policy pointers that form the list applicable when the (parameter%(NUM_BUCKETS - 1) + 1) == bucket_index. |
| 412 | * |
| 413 | * For example, a packet with policy ID of 7, when there are 4 ID buckets, will map to bucket (7%3 + 1) = 2. |
| 414 | */ |
| 415 | |
| 416 | static u_int64_t necp_kernel_ip_output_policies_condition_mask; |
| 417 | static size_t necp_kernel_ip_output_policies_count; |
| 418 | static size_t necp_kernel_ip_output_policies_non_id_count; |
| 419 | static LIST_HEAD(_necpkernelipoutputpolicies, necp_kernel_ip_output_policy) necp_kernel_ip_output_policies; |
| 420 | #define NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS 5 |
| 421 | #define NECP_IP_OUTPUT_MAP_ID_TO_BUCKET(id) (id ? (id%(NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS - 1) + 1) : 0) |
| 422 | static size_t necp_kernel_ip_output_policies_map_counts[NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS]; |
| 423 | static struct necp_kernel_ip_output_policy **necp_kernel_ip_output_policies_map[NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS]; |
| 424 | static struct necp_kernel_socket_policy pass_policy = |
| 425 | { |
| 426 | .id = NECP_KERNEL_POLICY_ID_NO_MATCH, |
| 427 | .result = NECP_KERNEL_POLICY_RESULT_PASS, |
| 428 | }; |
| 429 | |
| 430 | static struct necp_session *necp_create_session(void); |
| 431 | static void necp_delete_session(struct necp_session *session); |
| 432 | |
| 433 | static necp_policy_id necp_handle_policy_add(struct necp_session *session, |
| 434 | u_int8_t *tlv_buffer, size_t tlv_buffer_length, int offset, int *error); |
| 435 | static int necp_handle_policy_dump_all(user_addr_t out_buffer, size_t out_buffer_length); |
| 436 | |
| 437 | #define MAX_RESULT_STRING_LEN 64 |
| 438 | static inline const char * necp_get_result_description(char *result_string, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter); |
| 439 | |
| 440 | static struct necp_session_policy *necp_policy_create(struct necp_session *session, necp_policy_order order, u_int8_t *conditions_array, u_int32_t conditions_array_size, u_int8_t *route_rules_array, u_int32_t route_rules_array_size, u_int8_t *result, u_int32_t result_size); |
| 441 | static struct necp_session_policy *necp_policy_find(struct necp_session *session, necp_policy_id policy_id); |
| 442 | static bool necp_policy_mark_for_deletion(struct necp_session *session, struct necp_session_policy *policy); |
| 443 | static bool necp_policy_mark_all_for_deletion(struct necp_session *session); |
| 444 | static bool necp_policy_delete(struct necp_session *session, struct necp_session_policy *policy); |
| 445 | static void necp_policy_apply_all(struct necp_session *session); |
| 446 | |
| 447 | static necp_kernel_policy_id necp_kernel_socket_policy_add(necp_policy_order order, u_int32_t session_order, int session_pid, u_int64_t condition_mask, u_int64_t condition_negated_mask, necp_app_id cond_app_id, necp_app_id cond_real_app_id, char *cond_custom_entitlement, u_int32_t cond_account_id, char *cond_domain, u_int32_t cond_domain_filter, char *cond_url, pid_t cond_pid, int32_t cond_pidversion, uid_t cond_uid, uid_t cond_real_uid, ifnet_t cond_bound_interface, struct necp_policy_condition_tc_range cond_traffic_class, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, struct necp_policy_condition_agent_type *cond_agent_type, struct necp_policy_condition_sdk_version *cond_sdk_version, u_int32_t cond_client_flags, char *cond_signing_identifier, u_int16_t cond_packet_filter_tags, u_int16_t cond_scheme_port, u_int32_t cond_bound_interface_flags, u_int32_t cond_bound_interface_eflags, u_int32_t cond_bound_interface_xflags, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter); |
| 448 | static bool necp_kernel_socket_policy_delete(necp_kernel_policy_id policy_id); |
| 449 | static bool necp_kernel_socket_policies_reprocess(void); |
| 450 | static bool necp_kernel_socket_policies_update_uuid_table(void); |
| 451 | static inline struct necp_kernel_socket_policy *necp_socket_find_policy_match_with_info_locked(struct necp_kernel_socket_policy **policy_search_array, struct necp_socket_info *info, necp_kernel_policy_filter *return_filter, u_int32_t *return_route_rule_id_array, size_t *return_route_rule_id_array_count, size_t route_rule_id_array_count, necp_kernel_policy_result *return_service_action, necp_kernel_policy_service *return_service, u_int32_t *return_netagent_array, u_int32_t *return_netagent_use_flags_array, size_t netagent_array_count, struct necp_client_parameter_netagent_type *required_agent_types, u_int32_t num_required_agent_types, proc_t proc, u_int16_t pf_tag, necp_kernel_policy_id *skip_policy_id, struct rtentry *rt, necp_kernel_policy_result *return_drop_dest_policy_result, necp_drop_all_bypass_check_result_t *return_drop_all_bypass, u_int32_t *return_flow_divert_aggregate_unit, struct socket *, int debug); |
| 452 | |
| 453 | static necp_kernel_policy_id necp_kernel_ip_output_policy_add(necp_policy_order order, necp_policy_order suborder, u_int32_t session_order, int session_pid, u_int64_t condition_mask, u_int64_t condition_negated_mask, necp_kernel_policy_id cond_policy_id, ifnet_t cond_bound_interface, u_int32_t cond_last_interface_index, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, u_int16_t cond_packet_filter_tags, u_int16_t cond_scheme_port, u_int32_t cond_bound_interface_flags, u_int32_t cond_bound_interface_eflags, u_int32_t cond_bound_interface_xflags, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter); |
| 454 | static bool necp_kernel_ip_output_policy_delete(necp_kernel_policy_id policy_id); |
| 455 | static bool necp_kernel_ip_output_policies_reprocess(void); |
| 456 | |
| 457 | static bool necp_is_addr_in_range(struct sockaddr *addr, struct sockaddr *range_start, struct sockaddr *range_end); |
| 458 | static bool necp_is_range_in_range(struct sockaddr *inner_range_start, struct sockaddr *inner_range_end, struct sockaddr *range_start, struct sockaddr *range_end); |
| 459 | static bool necp_is_addr_in_subnet(struct sockaddr *addr, struct sockaddr *subnet_addr, u_int8_t subnet_prefix); |
| 460 | static int necp_addr_compare(struct sockaddr *sa1, struct sockaddr *sa2, int check_port); |
| 461 | static bool necp_buffer_compare_with_bit_prefix(u_int8_t *p1, u_int8_t *p2, u_int32_t bits); |
| 462 | static bool necp_addr_is_empty(struct sockaddr *addr); |
| 463 | static bool necp_is_loopback(struct sockaddr *local_addr, struct sockaddr *remote_addr, struct inpcb *inp, struct mbuf *packet, u_int32_t bound_interface_index); |
| 464 | static bool necp_is_intcoproc(struct inpcb *inp, struct mbuf *packet); |
| 465 | |
| 466 | struct necp_uuid_id_mapping { |
| 467 | LIST_ENTRY(necp_uuid_id_mapping) chain; |
| 468 | uuid_t uuid; |
| 469 | u_int32_t id; |
| 470 | os_refcnt_t refcount; |
| 471 | u_int32_t table_usecount; // Add to UUID policy table count |
| 472 | }; |
| 473 | static size_t necp_num_uuid_app_id_mappings; |
| 474 | static bool necp_uuid_app_id_mappings_dirty; |
| 475 | #define NECP_UUID_APP_ID_HASH_SIZE 64 |
| 476 | static u_long necp_uuid_app_id_hash_mask; |
| 477 | static u_long necp_uuid_app_id_hash_num_buckets; |
| 478 | static LIST_HEAD(necp_uuid_id_mapping_head, necp_uuid_id_mapping) * necp_uuid_app_id_hashtbl, necp_uuid_service_id_list; // App map is real hash table, service map is just mapping |
| 479 | #define APPUUIDHASH(uuid) (&necp_uuid_app_id_hashtbl[uuid[0] & necp_uuid_app_id_hash_mask]) // Assume first byte of UUIDs are evenly distributed |
| 480 | static u_int32_t necp_create_uuid_app_id_mapping(uuid_t uuid, bool *allocated_mapping, bool uuid_policy_table); |
| 481 | static bool necp_remove_uuid_app_id_mapping(uuid_t uuid, bool *removed_mapping, bool uuid_policy_table); |
| 482 | static struct necp_uuid_id_mapping *necp_uuid_lookup_uuid_with_app_id_locked(u_int32_t local_id); |
| 483 | |
| 484 | static struct necp_uuid_id_mapping *necp_uuid_lookup_service_id_locked(uuid_t uuid); |
| 485 | static struct necp_uuid_id_mapping *necp_uuid_lookup_uuid_with_service_id_locked(u_int32_t local_id); |
| 486 | static u_int32_t necp_create_uuid_service_id_mapping(uuid_t uuid); |
| 487 | static bool necp_remove_uuid_service_id_mapping(uuid_t uuid); |
| 488 | static bool necp_remove_uuid_service_id_mapping_with_service_id(u_int32_t service_id); |
| 489 | |
| 490 | struct necp_string_id_mapping { |
| 491 | LIST_ENTRY(necp_string_id_mapping) chain; |
| 492 | char *string; |
| 493 | necp_app_id id; |
| 494 | os_refcnt_t refcount; |
| 495 | }; |
| 496 | static LIST_HEAD(necp_string_id_mapping_list, necp_string_id_mapping) necp_account_id_list; |
| 497 | static u_int32_t necp_create_string_to_id_mapping(struct necp_string_id_mapping_list *list, char *domain); |
| 498 | static bool necp_remove_string_to_id_mapping(struct necp_string_id_mapping_list *list, char *domain); |
| 499 | static struct necp_string_id_mapping *necp_lookup_string_with_id_locked(struct necp_string_id_mapping_list *list, u_int32_t local_id); |
| 500 | |
| 501 | static u_int32_t necp_create_domain_filter(struct necp_domain_filter_list *list, struct necp_domain_filter_list *owner_list, struct net_bloom_filter *filter); |
| 502 | static bool necp_remove_domain_filter(struct necp_domain_filter_list *list, struct necp_domain_filter_list *owner_list, u_int32_t filter_id); |
| 503 | static struct necp_domain_filter *necp_lookup_domain_filter(struct necp_domain_filter_list *list, u_int32_t filter_id); |
| 504 | |
| 505 | static struct necp_kernel_socket_policy *necp_kernel_socket_policy_find(necp_kernel_policy_id policy_id); |
| 506 | static struct necp_kernel_ip_output_policy *necp_kernel_ip_output_policy_find(necp_kernel_policy_id policy_id); |
| 507 | |
| 508 | static LIST_HEAD(_necp_kernel_service_list, necp_service_registration) necp_registered_service_list; |
| 509 | |
| 510 | static char *necp_create_trimmed_domain(char *string, size_t length); |
| 511 | static inline int necp_count_dots(char *string, size_t length); |
| 512 | |
| 513 | static char *necp_copy_string(char *string, size_t length); |
| 514 | static bool necp_update_qos_marking(struct ifnet *ifp, u_int32_t *netagent_array, size_t netagent_array_count, u_int32_t route_rule_id); |
| 515 | |
| 516 | #define ROUTE_RULE_IS_AGGREGATE(ruleid) (ruleid >= UINT16_MAX) |
| 517 | |
| 518 | #define MAX_ROUTE_RULE_INTERFACES 10 |
| 519 | struct necp_route_rule { |
| 520 | LIST_ENTRY(necp_route_rule) chain; |
| 521 | u_int32_t id; |
| 522 | u_int32_t netagent_id; |
| 523 | u_int32_t control_unit; |
| 524 | u_int32_t match_netagent_id; |
| 525 | u_int32_t effective_type; |
| 526 | u_int8_t default_action; |
| 527 | u_int8_t cellular_action; |
| 528 | u_int8_t wifi_action; |
| 529 | u_int8_t wired_action; |
| 530 | u_int8_t expensive_action; |
| 531 | u_int8_t constrained_action; |
| 532 | u_int8_t companion_action; |
| 533 | u_int exception_if_indices[MAX_ROUTE_RULE_INTERFACES]; |
| 534 | u_int8_t exception_if_actions[MAX_ROUTE_RULE_INTERFACES]; |
| 535 | os_refcnt_t refcount; |
| 536 | }; |
| 537 | static LIST_HEAD(necp_route_rule_list, necp_route_rule) necp_route_rules; |
| 538 | static u_int32_t necp_create_route_rule(struct necp_route_rule_list *list, u_int8_t *route_rules_array, u_int32_t route_rules_array_size, bool *has_socket_only_actions); |
| 539 | static bool necp_remove_route_rule(struct necp_route_rule_list *list, u_int32_t route_rule_id); |
| 540 | static bool necp_route_is_interface_type_allowed(struct rtentry *route, struct ifnet *ifp, proc_t proc, struct inpcb *inp); |
| 541 | static bool necp_route_is_allowed(struct rtentry *route, ifnet_t interface, u_int32_t *netagent_array, size_t netagent_array_count, |
| 542 | u_int32_t route_rule_id, u_int32_t *interface_type_denied); |
| 543 | static uint32_t necp_route_get_netagent(struct rtentry *route, u_int32_t *netagent_array, size_t netagent_array_count, u_int32_t route_rule_id, bool *remove); |
| 544 | static bool necp_route_rule_matches_agents(u_int32_t route_rule_id); |
| 545 | static uint32_t necp_route_get_flow_divert(struct rtentry *route, u_int32_t *netagent_array, size_t netagent_array_count, u_int32_t route_rule_id, u_int32_t *flow_divert_aggregate_unit); |
| 546 | static struct necp_route_rule *necp_lookup_route_rule_locked(struct necp_route_rule_list *list, u_int32_t route_rule_id); |
| 547 | static inline void necp_get_parent_is_entitled(task_t task, struct necp_socket_info *info); |
| 548 | |
| 549 | #define MAX_AGGREGATE_ROUTE_RULES 16 |
| 550 | struct necp_aggregate_route_rule { |
| 551 | LIST_ENTRY(necp_aggregate_route_rule) chain; |
| 552 | u_int32_t id; |
| 553 | u_int32_t rule_ids[MAX_AGGREGATE_ROUTE_RULES]; |
| 554 | }; |
| 555 | static LIST_HEAD(necp_aggregate_route_rule_list, necp_aggregate_route_rule) necp_aggregate_route_rules; |
| 556 | static u_int32_t necp_create_aggregate_route_rule(u_int32_t *rule_ids); |
| 557 | |
| 558 | // Sysctl definitions |
| 559 | static int sysctl_handle_necp_level SYSCTL_HANDLER_ARGS; |
| 560 | static int sysctl_handle_necp_unentitled_level SYSCTL_HANDLER_ARGS; |
| 561 | static int sysctl_handle_necp_management_level SYSCTL_HANDLER_ARGS; |
| 562 | |
| 563 | SYSCTL_NODE(_net, OID_AUTO, necp, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "NECP"); |
| 564 | SYSCTL_INT(_net_necp, NECPCTL_DEDUP_POLICIES, dedup_policies, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_dedup_policies, 0, ""); |
| 565 | SYSCTL_INT(_net_necp, NECPCTL_RESTRICT_MULTICAST, restrict_multicast, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_restrict_multicast, 0, ""); |
| 566 | SYSCTL_INT(_net_necp, NECPCTL_PASS_LOOPBACK, pass_loopback, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_pass_loopback, 0, ""); |
| 567 | SYSCTL_INT(_net_necp, NECPCTL_PASS_KEEPALIVES, pass_keepalives, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_pass_keepalives, 0, ""); |
| 568 | SYSCTL_INT(_net_necp, NECPCTL_PASS_INTERPOSE, pass_interpose, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_pass_interpose, 0, ""); |
| 569 | SYSCTL_INT(_net_necp, NECPCTL_DEBUG, debug, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_debug, 0, ""); |
| 570 | SYSCTL_PROC(_net_necp, NECPCTL_DROP_UNENTITLED_LEVEL, drop_unentitled_level, CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW, &necp_drop_unentitled_level, 0, &sysctl_handle_necp_unentitled_level, "IU", ""); |
| 571 | SYSCTL_PROC(_net_necp, NECPCTL_DROP_MANAGEMENT_LEVEL, drop_management_level, CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW, &necp_drop_management_level, 0, &sysctl_handle_necp_management_level, "IU", ""); |
| 572 | SYSCTL_PROC(_net_necp, NECPCTL_DROP_ALL_LEVEL, drop_all_level, CTLTYPE_INT | CTLFLAG_LOCKED | CTLFLAG_RW, &necp_drop_all_level, 0, &sysctl_handle_necp_level, "IU", ""); |
| 573 | SYSCTL_LONG(_net_necp, NECPCTL_SOCKET_POLICY_COUNT, socket_policy_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_kernel_socket_policies_count, ""); |
| 574 | SYSCTL_LONG(_net_necp, NECPCTL_SOCKET_NON_APP_POLICY_COUNT, socket_non_app_policy_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_kernel_socket_policies_non_app_count, ""); |
| 575 | SYSCTL_LONG(_net_necp, NECPCTL_IP_POLICY_COUNT, ip_policy_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_kernel_ip_output_policies_count, ""); |
| 576 | SYSCTL_INT(_net_necp, NECPCTL_SESSION_COUNT, session_count, CTLFLAG_LOCKED | CTLFLAG_RD, &necp_session_count, 0, ""); |
| 577 | |
| 578 | static struct necp_drop_dest_policy necp_drop_dest_policy; |
| 579 | static int necp_drop_dest_debug = 0; // 0: off, 1: match, >1: every evaluation |
| 580 | SYSCTL_INT(_net_necp, OID_AUTO, drop_dest_debug, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_drop_dest_debug, 0, ""); |
| 581 | |
| 582 | static int sysctl_handle_necp_drop_dest_level SYSCTL_HANDLER_ARGS; |
| 583 | SYSCTL_PROC(_net_necp, OID_AUTO, drop_dest_level, CTLTYPE_STRUCT | CTLFLAG_LOCKED | CTLFLAG_ANYBODY | CTLFLAG_RW, |
| 584 | 0, 0, &sysctl_handle_necp_drop_dest_level, "S,necp_drop_dest_level", ""); |
| 585 | |
| 586 | static bool necp_address_matches_drop_dest_policy(union necp_sockaddr_union *, u_int32_t); |
| 587 | |
| 588 | /* |
| 589 | * data tracing control - |
| 590 | * |
| 591 | * necp_data_tracing_level : 1 for brief trace, 2 for policy details, 3 for condition details |
| 592 | * necp_data_tracing_port : match traffic with specified port |
| 593 | * necp_data_tracing_proto : match traffic with specified protocol |
| 594 | * necp_data_tracing_pid : match traffic with specified pid (only applied at socket level) |
| 595 | * necp_data_tracing_ifindex : match traffic on specified ifindex |
| 596 | * necp_data_tracing_match_all: trace traffic only if ALL specified attributes matched. Default is 0 to trace traffic if any specified attributes matched. |
| 597 | * data_tracing_session_order : match policies in the specified session - log traffic that hit these policies |
| 598 | * necp_data_tracing_policy_order : match specified policy - log traffic that hit this policy |
| 599 | */ |
| 600 | static int necp_data_tracing_level = 0; |
| 601 | SYSCTL_INT(_net_necp, OID_AUTO, data_tracing_level, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_data_tracing_level, 0, ""); |
| 602 | |
| 603 | static int necp_data_tracing_port = 0; |
| 604 | SYSCTL_INT(_net_necp, OID_AUTO, data_tracing_port, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_data_tracing_port, 0, ""); |
| 605 | |
| 606 | static int necp_data_tracing_proto = 0; |
| 607 | SYSCTL_INT(_net_necp, OID_AUTO, data_tracing_proto, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_data_tracing_proto, 0, ""); |
| 608 | |
| 609 | static int necp_data_tracing_pid = 0; |
| 610 | SYSCTL_INT(_net_necp, OID_AUTO, data_tracing_pid, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_data_tracing_pid, 0, ""); |
| 611 | |
| 612 | static int necp_data_tracing_ifindex = 0; |
| 613 | SYSCTL_INT(_net_necp, OID_AUTO, data_tracing_ifindex, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_data_tracing_ifindex, 0, ""); |
| 614 | |
| 615 | static int necp_data_tracing_match_all = 0; |
| 616 | SYSCTL_INT(_net_necp, OID_AUTO, data_tracing_match_all, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_data_tracing_match_all, 0, ""); |
| 617 | |
| 618 | static int necp_data_tracing_session_order = 0; |
| 619 | SYSCTL_INT(_net_necp, OID_AUTO, data_tracing_session_order, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_data_tracing_session_order, 0, ""); |
| 620 | |
| 621 | static int necp_data_tracing_policy_order = 0; |
| 622 | SYSCTL_INT(_net_necp, OID_AUTO, data_tracing_policy_order, CTLFLAG_LOCKED | CTLFLAG_RW, &necp_data_tracing_policy_order, 0, ""); |
| 623 | |
| 624 | #define NECP_DATA_TRACE_LEVEL_BRIEF 1 |
| 625 | #define NECP_DATA_TRACE_LEVEL_POLICY 2 |
| 626 | #define NECP_DATA_TRACE_LEVEL_CONDITION 3 |
| 627 | |
| 628 | #define NECP_DATA_TRACE_PID_MATCHED(pid) \ |
| 629 | (pid == necp_data_tracing_pid) |
| 630 | #define NECP_DATA_TRACE_PROTO_MATCHED(protocol) \ |
| 631 | (protocol == necp_data_tracing_proto) |
| 632 | #define NECP_DATA_TRACE_LOCAL_PORT_MATCHED(local_addr) \ |
| 633 | (local_addr && (ntohs(local_addr->sin.sin_port) == necp_data_tracing_port || ntohs(local_addr->sin6.sin6_port) == necp_data_tracing_port)) |
| 634 | #define NECP_DATA_TRACE_REMOTE_ORT_MATCHED(remote_addr) \ |
| 635 | (remote_addr && (ntohs(remote_addr->sin.sin_port) == necp_data_tracing_port || ntohs(remote_addr->sin6.sin6_port) == necp_data_tracing_port)) |
| 636 | #define NECP_DATA_TRACE_IFINDEX_MATCHED(ifindex) \ |
| 637 | (ifindex == necp_data_tracing_ifindex) |
| 638 | |
| 639 | #define NECP_ENABLE_DATA_TRACE_OR(local_addr, remote_addr, protocol, pid, ifindex) \ |
| 640 | ((necp_data_tracing_level && \ |
| 641 | ((necp_data_tracing_pid && (!pid || NECP_DATA_TRACE_PID_MATCHED(pid))) || \ |
| 642 | (necp_data_tracing_proto && NECP_DATA_TRACE_PROTO_MATCHED(protocol)) || \ |
| 643 | (necp_data_tracing_ifindex && NECP_DATA_TRACE_IFINDEX_MATCHED(ifindex)) || \ |
| 644 | (necp_data_tracing_port && (NECP_DATA_TRACE_LOCAL_PORT_MATCHED(local_addr) || NECP_DATA_TRACE_REMOTE_ORT_MATCHED(remote_addr))))) ? necp_data_tracing_level : 0) |
| 645 | |
| 646 | #define NECP_ENABLE_DATA_TRACE_AND(local_addr, remote_addr, protocol, pid, ifindex) \ |
| 647 | ((necp_data_tracing_level && \ |
| 648 | ((!necp_data_tracing_pid || !pid || NECP_DATA_TRACE_PID_MATCHED(pid)) && \ |
| 649 | (!necp_data_tracing_proto || NECP_DATA_TRACE_PROTO_MATCHED(protocol)) && \ |
| 650 | (!necp_data_tracing_ifindex || NECP_DATA_TRACE_IFINDEX_MATCHED(ifindex)) && \ |
| 651 | (!necp_data_tracing_port || (NECP_DATA_TRACE_LOCAL_PORT_MATCHED(local_addr) || NECP_DATA_TRACE_REMOTE_ORT_MATCHED(remote_addr))))) ? necp_data_tracing_level : 0) |
| 652 | |
| 653 | #define NECP_ENABLE_DATA_TRACE(local_addr, remote_addr, protocol, pid, ifindex) \ |
| 654 | (necp_data_tracing_match_all ? \ |
| 655 | NECP_ENABLE_DATA_TRACE_AND(local_addr, remote_addr, protocol, pid, ifindex) : \ |
| 656 | NECP_ENABLE_DATA_TRACE_OR(local_addr, remote_addr, protocol, pid, ifindex)) |
| 657 | |
| 658 | #define NECP_DATA_TRACE_ON(debug) (debug) |
| 659 | #define NECP_DATA_TRACE_POLICY_ON(debug) (debug > NECP_DATA_TRACE_LEVEL_BRIEF) |
| 660 | #define NECP_DATA_TRACE_CONDITION_ON(debug) (debug > NECP_DATA_TRACE_LEVEL_POLICY) |
| 661 | |
| 662 | const char* necp_get_address_string(union necp_sockaddr_union *address, char addr_str[MAX_IPv6_STR_LEN]); |
| 663 | |
| 664 | #define NECP_DATA_TRACE_LOG_APP_LEVEL(debug, caller, log_msg, policy_id, skip_policy_id) \ |
| 665 | if (NECP_DATA_TRACE_ON(debug)) { \ |
| 666 | char laddr_str[MAX_IPv6_STR_LEN]; \ |
| 667 | char raddr_str[MAX_IPv6_STR_LEN]; \ |
| 668 | NECPDATATRACELOG(LOG_ERR, "DATA-TRACE <%s>: %s - fam %d proto %d port <local %d/%d remote %d/%d> <local %s remote %s> <drop-all order %d> <pid=%d Application %d Real Application %d BoundInterface %d> <policy_id %d skip_policy_id %d>", \ |
| 669 | caller, log_msg, info.local_addr.sin.sin_family, info.protocol, ntohs(info.local_addr.sin.sin_port), ntohs(info.local_addr.sin6.sin6_port), ntohs(info.remote_addr.sin.sin_port), ntohs(info.remote_addr.sin6.sin6_port), necp_get_address_string(&info.local_addr, laddr_str), necp_get_address_string(&info.remote_addr, raddr_str), necp_drop_all_order, info.pid, info.application_id, info.real_application_id, info.bound_interface_index, policy_id, skip_policy_id); \ |
| 670 | } |
| 671 | |
| 672 | #define NECP_DATA_TRACE_LOG_SOCKET(debug, socket, caller, log_msg, policy_id, skip_policy_id) \ |
| 673 | if (NECP_DATA_TRACE_ON(debug)) { \ |
| 674 | char laddr_str[MAX_IPv6_STR_LEN]; \ |
| 675 | char raddr_str[MAX_IPv6_STR_LEN]; \ |
| 676 | NECPDATATRACELOG(LOG_ERR, "DATA-TRACE <%s %llx>: %s - fam %d proto %d port <local %d/%d remote %d/%d> <local %s remote %s> <drop-all order %d> <pid=%d Application %d Real Application %d BoundInterface %d> <policy_id %d skip_policy_id %d>", \ |
| 677 | caller, (unsigned long long)socket, log_msg, info.local_addr.sin.sin_family, info.protocol, ntohs(info.local_addr.sin.sin_port), ntohs(info.local_addr.sin6.sin6_port), ntohs(info.remote_addr.sin.sin_port), ntohs(info.remote_addr.sin6.sin6_port), necp_get_address_string(&info.local_addr, laddr_str), necp_get_address_string(&info.remote_addr, raddr_str), necp_drop_all_order, info.pid, info.application_id, info.real_application_id, info.bound_interface_index, policy_id, skip_policy_id); \ |
| 678 | } |
| 679 | |
| 680 | #define NECP_DATA_TRACE_LOG_SOCKET_RESULT(debug, socket, caller, log_msg) \ |
| 681 | if (NECP_DATA_TRACE_ON(debug)) { \ |
| 682 | char laddr_str[MAX_IPv6_STR_LEN]; \ |
| 683 | char raddr_str[MAX_IPv6_STR_LEN]; \ |
| 684 | NECPDATATRACELOG(LOG_ERR, "DATA-TRACE <%s %llx>: %s - fam %d proto %d port <local %d/%d remote %d/%d> <local %s remote %s> <drop-all order %d> <pid=%d Application %d Real Application %d BoundInterface %d> (policy id=%d session_order=%d policy_order=%d result=%s)", \ |
| 685 | caller, (unsigned long long)socket, log_msg, info->local_addr.sin.sin_family, info->protocol, ntohs(info->local_addr.sin.sin_port), ntohs(info->local_addr.sin6.sin6_port), ntohs(info->remote_addr.sin.sin_port), ntohs(info->remote_addr.sin6.sin6_port), necp_get_address_string(&info->local_addr, laddr_str), necp_get_address_string(&info->remote_addr, raddr_str), necp_drop_all_order, info->pid, info->application_id, info->real_application_id, info->bound_interface_index, policy_search_array[i]->id, policy_search_array[i]->session_order, policy_search_array[i]->order, resultString[policy_search_array[i]->result]); \ |
| 686 | } |
| 687 | |
| 688 | #define NECP_DATA_TRACE_LOG_IP4(debug, caller, log_msg) \ |
| 689 | if (NECP_DATA_TRACE_ON(debug)) { \ |
| 690 | char laddr_str[MAX_IPv6_STR_LEN]; \ |
| 691 | char raddr_str[MAX_IPv6_STR_LEN]; \ |
| 692 | NECPDATATRACELOG(LOG_ERR, "DATA-TRACE <%s>: %s - fam %d proto %d port <local %d/%d remote %d/%d> <local %s remote %s> <drop-all order %d> <BoundInterface %d> <socket policy id %d socket skip id %d> <mbuf %X len %d %d>", \ |
| 693 | caller, log_msg, local_addr.sin.sin_family, protocol, ntohs(local_addr.sin.sin_port), ntohs(local_addr.sin6.sin6_port), ntohs(remote_addr.sin.sin_port), ntohs(remote_addr.sin6.sin6_port), necp_get_address_string(&local_addr, laddr_str), necp_get_address_string(&remote_addr, raddr_str), necp_drop_all_order, bound_interface_index, socket_policy_id, socket_skip_policy_id, (unsigned int)packet, ip->ip_len, ntohs(ip->ip_len)); \ |
| 694 | } |
| 695 | |
| 696 | #define NECP_DATA_TRACE_LOG_IP6(debug, caller, log_msg) \ |
| 697 | if (NECP_DATA_TRACE_ON(debug)) { \ |
| 698 | char laddr_str[MAX_IPv6_STR_LEN]; \ |
| 699 | char raddr_str[MAX_IPv6_STR_LEN]; \ |
| 700 | NECPDATATRACELOG(LOG_ERR, "DATA-TRACE <%s>: %s - fam %d proto %d port <local %d/%d remote %d/%d> <local %s remote %s> <drop-all order %d> <BoundInterface %d> <socket policy id %d socket skip id %d> <mbuf %X len %d %d>", \ |
| 701 | caller, log_msg, local_addr.sin.sin_family, protocol, ntohs(local_addr.sin.sin_port), ntohs(local_addr.sin6.sin6_port), ntohs(remote_addr.sin.sin_port), ntohs(remote_addr.sin6.sin6_port), necp_get_address_string(&local_addr, laddr_str), necp_get_address_string(&remote_addr, raddr_str), necp_drop_all_order, bound_interface_index, socket_policy_id, socket_skip_policy_id, (unsigned int)packet, ip6->ip6_plen, ntohs(ip6->ip6_plen)); \ |
| 702 | } |
| 703 | |
| 704 | #define NECP_DATA_TRACE_LOG_IP_RESULT(debug, caller, log_msg) \ |
| 705 | if (NECP_DATA_TRACE_ON(debug)) { \ |
| 706 | char laddr_str[MAX_IPv6_STR_LEN]; \ |
| 707 | char raddr_str[MAX_IPv6_STR_LEN]; \ |
| 708 | NECPDATATRACELOG(LOG_ERR, "DATA-TRACE <%s>: %s - fam %d proto %d port <local %d/%d remote %d/%d> <local %s remote %s> <drop-all order %d> <BoundInterface %d> (policy id=%d session_order=%d policy_order=%d result=%s)", \ |
| 709 | caller, log_msg, local_addr->sin.sin_family, protocol, ntohs(local_addr->sin.sin_port), ntohs(local_addr->sin6.sin6_port), ntohs(remote_addr->sin.sin_port), ntohs(remote_addr->sin6.sin6_port), necp_get_address_string(local_addr, laddr_str), necp_get_address_string(remote_addr, raddr_str), necp_drop_all_order, bound_interface_index, policy_search_array[i]->id, policy_search_array[i]->session_order, policy_search_array[i]->order, resultString[policy_search_array[i]->result]); \ |
| 710 | } |
| 711 | |
| 712 | #define NECP_DATA_TRACE_LOG_POLICY(debug, caller, log_msg) \ |
| 713 | if (NECP_DATA_TRACE_POLICY_ON(debug)) { \ |
| 714 | NECPDATATRACELOG(LOG_ERR, "DATA-TRACE <%s>: %s - policy id=%d session_order=%d policy_order=%d result=%s (cond_policy_id %d) (skip_session_order %d skip_order %d)", \ |
| 715 | caller, log_msg, policy_search_array[i]->id, policy_search_array[i]->session_order, policy_search_array[i]->order, resultString[policy_search_array[i]->result], policy_search_array[i]->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID ? policy_search_array[i]->cond_policy_id : 0, skip_session_order, skip_order); \ |
| 716 | } |
| 717 | |
| 718 | #define NECP_DATA_TRACE_LOG_CONDITION3(debug, caller, negate, name, val1, val2, val3, input1, input2, input3) \ |
| 719 | if (NECP_DATA_TRACE_CONDITION_ON(debug)) { \ |
| 720 | NECPDATATRACELOG(LOG_ERR, "DATA-TRACE <%s>: ------ %smatching <%s> <value (%d / 0x%X) (%d / 0x%X) (%d / 0x%X) input (%d / 0x%X) (%d / 0x%X) (%d / 0x%X)>", \ |
| 721 | caller, negate ? "!":"", name, val1, val1, val2, val2, val3, val3, input1, input1, input2, input2, input3, input3); \ |
| 722 | } |
| 723 | |
| 724 | #define NECP_DATA_TRACE_LOG_CONDITION_STR3(debug, caller, negate, name, val1, val2, val3, input1, input2, input3) \ |
| 725 | if (NECP_DATA_TRACE_CONDITION_ON(debug)) { \ |
| 726 | NECPDATATRACELOG(LOG_ERR, "DATA-TRACE <%s>: ------ %smatching <%s> <value %s %s %s input %s %s %s>", \ |
| 727 | caller, negate ? "!":"", name, val1 != NULL ? val1 : "null", val2 != NULL ? val2 : "null", val3 != NULL ? val3 : "null", \ |
| 728 | input1 != NULL ? input1 : "null", input2 != NULL ? input2 : "null", input3 != NULL ? input3 : "null"); \ |
| 729 | } |
| 730 | |
| 731 | #define NECP_DATA_TRACE_LOG_CONDITION(debug, caller, negate, name, val, input) \ |
| 732 | NECP_DATA_TRACE_LOG_CONDITION3(debug, caller, negate, name, val, 0, 0, input, 0, 0) |
| 733 | |
| 734 | #define NECP_DATA_TRACE_LOG_CONDITION_STR(debug, caller, negate, name, val, input) \ |
| 735 | NECP_DATA_TRACE_LOG_CONDITION_STR3(debug, caller, negate, name, val, "n/a", "n/a", input, "n/a", "n/a") |
| 736 | |
| 737 | #define NECP_IS_INTCOPROC_ADDRESS(addrv6) \ |
| 738 | (IN6_IS_ADDR_LINKLOCAL(addrv6) && \ |
| 739 | addrv6->s6_addr32[2] == ntohl(0xaede48ff) && addrv6->s6_addr32[3] == ntohl(0xfe334455)) |
| 740 | |
| 741 | const char* resultString[NECP_POLICY_RESULT_MAX + 1] = { |
| 742 | "INVALID", |
| 743 | "PASS", |
| 744 | "SKIP", |
| 745 | "DROP", |
| 746 | "SOCKET_DIVERT", |
| 747 | "SOCKET_FILTER", |
| 748 | "IP_TUNNEL", |
| 749 | "IP_FILTER", |
| 750 | "TRIGGER", |
| 751 | "TRIGGER_IF_NEEDED", |
| 752 | "TRIGGER_SCOPED", |
| 753 | "NO_TRIGGER_SCOPED", |
| 754 | "SOCKET_SCOPED", |
| 755 | "ROUTE_RULES", |
| 756 | "USE_NETAGENT", |
| 757 | "NETAGENT_SCOPED", |
| 758 | "SCOPED_DIRECT", |
| 759 | "ALLOW_UNENTITLED", |
| 760 | "REMOVE_NETAGENT" |
| 761 | }; |
| 762 | |
| 763 | // Session order allocation |
| 764 | static u_int32_t |
| 765 | necp_allocate_new_session_order(u_int32_t priority, u_int32_t control_unit) |
| 766 | { |
| 767 | u_int32_t new_order = 0; |
| 768 | |
| 769 | // For now, just allocate 1000 orders for each priority |
| 770 | if (priority == NECP_SESSION_PRIORITY_UNKNOWN || priority > NECP_SESSION_NUM_PRIORITIES) { |
| 771 | priority = NECP_SESSION_PRIORITY_DEFAULT; |
| 772 | } |
| 773 | |
| 774 | // Use the control unit to decide the offset into the priority list |
| 775 | new_order = (control_unit) + ((priority - 1) * 1000); |
| 776 | |
| 777 | return new_order; |
| 778 | } |
| 779 | |
| 780 | static inline u_int32_t |
| 781 | necp_get_first_order_for_priority(u_int32_t priority) |
| 782 | { |
| 783 | if (priority == 0) { |
| 784 | return 0; |
| 785 | } |
| 786 | return ((priority - 1) * 1000) + 1; |
| 787 | } |
| 788 | |
| 789 | // Sysctl handler |
| 790 | static int |
| 791 | sysctl_handle_necp_level SYSCTL_HANDLER_ARGS |
| 792 | { |
| 793 | #pragma unused(arg1, arg2) |
| 794 | int error = sysctl_handle_int(oidp, arg1: oidp->oid_arg1, arg2: oidp->oid_arg2, req); |
| 795 | necp_drop_all_order = necp_get_first_order_for_priority(priority: necp_drop_all_level); |
| 796 | return error; |
| 797 | } |
| 798 | |
| 799 | static int |
| 800 | sysctl_handle_necp_unentitled_level SYSCTL_HANDLER_ARGS |
| 801 | { |
| 802 | #pragma unused(arg1, arg2) |
| 803 | int error = sysctl_handle_int(oidp, arg1: oidp->oid_arg1, arg2: oidp->oid_arg2, req); |
| 804 | necp_drop_unentitled_order = necp_get_first_order_for_priority(priority: necp_drop_unentitled_level); |
| 805 | return error; |
| 806 | } |
| 807 | |
| 808 | // Use a macro here to avoid computing the kauth_cred_t when necp_drop_unentitled_level is 0 |
| 809 | static inline u_int32_t |
| 810 | _necp_process_drop_order_inner(kauth_cred_t cred) |
| 811 | { |
| 812 | if (priv_check_cred(cred, PRIV_NET_PRIVILEGED_CLIENT_ACCESS, flags: 0) != 0 && |
| 813 | priv_check_cred(cred, PRIV_NET_PRIVILEGED_SERVER_ACCESS, flags: 0) != 0) { |
| 814 | return necp_drop_unentitled_order; |
| 815 | } else { |
| 816 | return 0; |
| 817 | } |
| 818 | } |
| 819 | |
| 820 | #define necp_process_drop_order(_cred) (necp_drop_unentitled_order != 0 ? _necp_process_drop_order_inner(_cred) : necp_drop_unentitled_order) |
| 821 | #pragma GCC poison _necp_process_drop_order_inner |
| 822 | |
| 823 | static int |
| 824 | sysctl_handle_necp_management_level SYSCTL_HANDLER_ARGS |
| 825 | { |
| 826 | #pragma unused(arg1, arg2) |
| 827 | int error = sysctl_handle_int(oidp, arg1: oidp->oid_arg1, arg2: oidp->oid_arg2, req); |
| 828 | necp_drop_management_order = necp_get_first_order_for_priority(priority: necp_drop_management_level); |
| 829 | return error; |
| 830 | } |
| 831 | |
| 832 | // Session fd |
| 833 | |
| 834 | static int necp_session_op_close(struct fileglob *, vfs_context_t); |
| 835 | |
| 836 | static const struct fileops necp_session_fd_ops = { |
| 837 | .fo_type = DTYPE_NETPOLICY, |
| 838 | .fo_read = fo_no_read, |
| 839 | .fo_write = fo_no_write, |
| 840 | .fo_ioctl = fo_no_ioctl, |
| 841 | .fo_select = fo_no_select, |
| 842 | .fo_close = necp_session_op_close, |
| 843 | .fo_drain = fo_no_drain, |
| 844 | .fo_kqfilter = fo_no_kqfilter, |
| 845 | }; |
| 846 | |
| 847 | static inline int |
| 848 | necp_is_platform_binary(proc_t proc) |
| 849 | { |
| 850 | return (proc != NULL) ? (csproc_get_platform_binary(proc) && cs_valid(proc)) : 0; |
| 851 | } |
| 852 | |
| 853 | static inline necp_drop_all_bypass_check_result_t |
| 854 | necp_check_drop_all_bypass_result(proc_t proc) |
| 855 | { |
| 856 | if (proc == NULL) { |
| 857 | proc = current_proc(); |
| 858 | if (proc == NULL) { |
| 859 | return NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE; |
| 860 | } |
| 861 | } |
| 862 | |
| 863 | #if defined(XNU_TARGET_OS_OSX) |
| 864 | const char *signing_id = NULL; |
| 865 | const bool isConfigd = (necp_is_platform_binary(proc) && |
| 866 | (signing_id = cs_identity_get(proc)) && |
| 867 | (strlen(s: signing_id) == SIGNING_ID_CONFIGD_LEN) && |
| 868 | (memcmp(s1: signing_id, SIGNING_ID_CONFIGD, SIGNING_ID_CONFIGD_LEN) == 0)); |
| 869 | if (isConfigd) { |
| 870 | return NECP_DROP_ALL_BYPASS_CHECK_RESULT_TRUE; |
| 871 | } |
| 872 | #endif |
| 873 | |
| 874 | const task_t task = proc_task(proc); |
| 875 | if (task == NULL || !IOTaskHasEntitlement(task, entitlement: "com.apple.private.necp.drop_all_bypass")) { |
| 876 | return NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE; |
| 877 | } else { |
| 878 | return NECP_DROP_ALL_BYPASS_CHECK_RESULT_TRUE; |
| 879 | } |
| 880 | } |
| 881 | |
| 882 | int |
| 883 | necp_session_open(struct proc *p, struct necp_session_open_args *uap, int *retval) |
| 884 | { |
| 885 | #pragma unused(uap) |
| 886 | int error = 0; |
| 887 | struct necp_session *session = NULL; |
| 888 | struct fileproc *fp = NULL; |
| 889 | int fd = -1; |
| 890 | uid_t uid = kauth_cred_getuid(cred: kauth_cred_get()); |
| 891 | |
| 892 | if (!necp_is_platform_binary(proc: p)) { |
| 893 | NECPLOG0(LOG_ERR, "Only platform-signed binaries can open NECP sessions"); |
| 894 | error = EACCES; |
| 895 | goto done; |
| 896 | } |
| 897 | |
| 898 | if (uid != 0 && priv_check_cred(cred: kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, flags: 0) != 0) { |
| 899 | NECPLOG0(LOG_ERR, "Process does not hold necessary entitlement to open NECP session"); |
| 900 | error = EACCES; |
| 901 | goto done; |
| 902 | } |
| 903 | |
| 904 | error = falloc(p, &fp, &fd); |
| 905 | if (error != 0) { |
| 906 | goto done; |
| 907 | } |
| 908 | |
| 909 | session = necp_create_session(); |
| 910 | if (session == NULL) { |
| 911 | error = ENOMEM; |
| 912 | goto done; |
| 913 | } |
| 914 | |
| 915 | fp->fp_flags |= FP_CLOEXEC | FP_CLOFORK; |
| 916 | fp->fp_glob->fg_flag = 0; |
| 917 | fp->fp_glob->fg_ops = &necp_session_fd_ops; |
| 918 | fp_set_data(fp, fg_data: session); |
| 919 | |
| 920 | proc_fdlock(p); |
| 921 | procfdtbl_releasefd(p, fd, NULL); |
| 922 | fp_drop(p, fd, fp, locked: 1); |
| 923 | proc_fdunlock(p); |
| 924 | |
| 925 | *retval = fd; |
| 926 | done: |
| 927 | if (error != 0) { |
| 928 | if (fp != NULL) { |
| 929 | fp_free(p, fd, fp); |
| 930 | fp = NULL; |
| 931 | } |
| 932 | } |
| 933 | |
| 934 | return error; |
| 935 | } |
| 936 | |
| 937 | static int |
| 938 | necp_session_op_close(struct fileglob *fg, vfs_context_t ctx) |
| 939 | { |
| 940 | #pragma unused(ctx) |
| 941 | struct necp_session *session = (struct necp_session *)fg_get_data(fg); |
| 942 | fg_set_data(fg, NULL); |
| 943 | |
| 944 | if (session != NULL) { |
| 945 | necp_policy_mark_all_for_deletion(session); |
| 946 | necp_policy_apply_all(session); |
| 947 | necp_delete_session(session); |
| 948 | return 0; |
| 949 | } else { |
| 950 | return ENOENT; |
| 951 | } |
| 952 | } |
| 953 | |
| 954 | static int |
| 955 | necp_session_find_from_fd(struct proc *p, int fd, |
| 956 | struct fileproc **fpp, struct necp_session **session) |
| 957 | { |
| 958 | struct fileproc *fp = NULL; |
| 959 | int error = fp_get_ftype(p, fd, ftype: DTYPE_NETPOLICY, ENODEV, fpp: &fp); |
| 960 | |
| 961 | if (error == 0) { |
| 962 | *fpp = fp; |
| 963 | *session = (struct necp_session *)fp_get_data(fp); |
| 964 | if ((*session)->necp_fd_type != necp_fd_type_session) { |
| 965 | // Not a client fd, ignore |
| 966 | fp_drop(p, fd, fp, locked: 0); |
| 967 | error = EINVAL; |
| 968 | } |
| 969 | } |
| 970 | |
| 971 | return error; |
| 972 | } |
| 973 | |
| 974 | static int |
| 975 | necp_session_add_policy(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 976 | { |
| 977 | int error = 0; |
| 978 | u_int8_t *tlv_buffer = NULL; |
| 979 | |
| 980 | if (uap->in_buffer_length == 0 || uap->in_buffer_length > NECP_MAX_POLICY_SIZE || uap->in_buffer == 0) { |
| 981 | NECPLOG(LOG_ERR, "necp_session_add_policy invalid input (%zu)", (size_t)uap->in_buffer_length); |
| 982 | error = EINVAL; |
| 983 | goto done; |
| 984 | } |
| 985 | |
| 986 | if (uap->out_buffer_length < sizeof(necp_policy_id) || uap->out_buffer == 0) { |
| 987 | NECPLOG(LOG_ERR, "necp_session_add_policy invalid output buffer (%zu)", (size_t)uap->out_buffer_length); |
| 988 | error = EINVAL; |
| 989 | goto done; |
| 990 | } |
| 991 | |
| 992 | if ((tlv_buffer = (u_int8_t *)kalloc_data(uap->in_buffer_length, Z_WAITOK | Z_ZERO)) == NULL) { |
| 993 | error = ENOMEM; |
| 994 | goto done; |
| 995 | } |
| 996 | |
| 997 | error = copyin(uap->in_buffer, tlv_buffer, uap->in_buffer_length); |
| 998 | if (error != 0) { |
| 999 | NECPLOG(LOG_ERR, "necp_session_add_policy tlv copyin error (%d)", error); |
| 1000 | goto done; |
| 1001 | } |
| 1002 | |
| 1003 | necp_policy_id new_policy_id = necp_handle_policy_add(session, tlv_buffer, tlv_buffer_length: uap->in_buffer_length, offset: 0, error: &error); |
| 1004 | if (error != 0) { |
| 1005 | NECPLOG(LOG_ERR, "necp_session_add_policy failed to add policy (%d)", error); |
| 1006 | goto done; |
| 1007 | } |
| 1008 | |
| 1009 | error = copyout(&new_policy_id, uap->out_buffer, sizeof(new_policy_id)); |
| 1010 | if (error != 0) { |
| 1011 | NECPLOG(LOG_ERR, "necp_session_add_policy policy_id copyout error (%d)", error); |
| 1012 | goto done; |
| 1013 | } |
| 1014 | |
| 1015 | done: |
| 1016 | if (tlv_buffer != NULL) { |
| 1017 | kfree_data(tlv_buffer, uap->in_buffer_length); |
| 1018 | tlv_buffer = NULL; |
| 1019 | } |
| 1020 | *retval = error; |
| 1021 | |
| 1022 | return error; |
| 1023 | } |
| 1024 | |
| 1025 | static int |
| 1026 | necp_session_get_policy(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1027 | { |
| 1028 | int error = 0; |
| 1029 | u_int8_t *response = NULL; |
| 1030 | |
| 1031 | if (uap->in_buffer_length < sizeof(necp_policy_id) || uap->in_buffer == 0) { |
| 1032 | NECPLOG(LOG_ERR, "necp_session_get_policy invalid input (%zu)", (size_t)uap->in_buffer_length); |
| 1033 | error = EINVAL; |
| 1034 | goto done; |
| 1035 | } |
| 1036 | |
| 1037 | necp_policy_id policy_id = 0; |
| 1038 | error = copyin(uap->in_buffer, &policy_id, sizeof(policy_id)); |
| 1039 | if (error != 0) { |
| 1040 | NECPLOG(LOG_ERR, "necp_session_get_policy policy_id copyin error (%d)", error); |
| 1041 | goto done; |
| 1042 | } |
| 1043 | |
| 1044 | struct necp_session_policy *policy = necp_policy_find(session, policy_id); |
| 1045 | if (policy == NULL || policy->pending_deletion) { |
| 1046 | NECPLOG(LOG_ERR, "Failed to find policy with id %d", policy_id); |
| 1047 | error = ENOENT; |
| 1048 | goto done; |
| 1049 | } |
| 1050 | |
| 1051 | u_int32_t order_tlv_size = sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(necp_policy_order); |
| 1052 | u_int32_t result_tlv_size = (policy->result_size ? (sizeof(u_int8_t) + sizeof(u_int32_t) + policy->result_size) : 0); |
| 1053 | u_int32_t response_size = order_tlv_size + result_tlv_size + policy->conditions_size; |
| 1054 | |
| 1055 | if (uap->out_buffer_length < response_size || uap->out_buffer == 0) { |
| 1056 | NECPLOG(LOG_ERR, "necp_session_get_policy buffer not large enough (%zu < %u)", (size_t)uap->out_buffer_length, response_size); |
| 1057 | error = EINVAL; |
| 1058 | goto done; |
| 1059 | } |
| 1060 | |
| 1061 | if (response_size > NECP_MAX_POLICY_SIZE) { |
| 1062 | NECPLOG(LOG_ERR, "necp_session_get_policy size too large to copy (%u)", response_size); |
| 1063 | error = EINVAL; |
| 1064 | goto done; |
| 1065 | } |
| 1066 | |
| 1067 | response = (u_int8_t *)kalloc_data(response_size, Z_WAITOK | Z_ZERO); |
| 1068 | if (response == NULL) { |
| 1069 | error = ENOMEM; |
| 1070 | goto done; |
| 1071 | } |
| 1072 | |
| 1073 | u_int8_t *cursor = response; |
| 1074 | cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ORDER, length: sizeof(necp_policy_order), value: &policy->order, buffer: response, buffer_length: response_size); |
| 1075 | if (result_tlv_size) { |
| 1076 | cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_RESULT, length: policy->result_size, value: &policy->result, buffer: response, buffer_length: response_size); |
| 1077 | } |
| 1078 | if (policy->conditions_size) { |
| 1079 | memcpy(dst: ((u_int8_t *)(void *)(cursor)), src: policy->conditions, n: policy->conditions_size); |
| 1080 | } |
| 1081 | |
| 1082 | error = copyout(response, uap->out_buffer, response_size); |
| 1083 | if (error != 0) { |
| 1084 | NECPLOG(LOG_ERR, "necp_session_get_policy TLV copyout error (%d)", error); |
| 1085 | goto done; |
| 1086 | } |
| 1087 | |
| 1088 | done: |
| 1089 | if (response != NULL) { |
| 1090 | kfree_data(response, response_size); |
| 1091 | response = NULL; |
| 1092 | } |
| 1093 | *retval = error; |
| 1094 | |
| 1095 | return error; |
| 1096 | } |
| 1097 | |
| 1098 | static int |
| 1099 | necp_session_delete_policy(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1100 | { |
| 1101 | int error = 0; |
| 1102 | |
| 1103 | if (uap->in_buffer_length < sizeof(necp_policy_id) || uap->in_buffer == 0) { |
| 1104 | NECPLOG(LOG_ERR, "necp_session_delete_policy invalid input (%zu)", (size_t)uap->in_buffer_length); |
| 1105 | error = EINVAL; |
| 1106 | goto done; |
| 1107 | } |
| 1108 | |
| 1109 | necp_policy_id delete_policy_id = 0; |
| 1110 | error = copyin(uap->in_buffer, &delete_policy_id, sizeof(delete_policy_id)); |
| 1111 | if (error != 0) { |
| 1112 | NECPLOG(LOG_ERR, "necp_session_delete_policy policy_id copyin error (%d)", error); |
| 1113 | goto done; |
| 1114 | } |
| 1115 | |
| 1116 | struct necp_session_policy *policy = necp_policy_find(session, policy_id: delete_policy_id); |
| 1117 | if (policy == NULL || policy->pending_deletion) { |
| 1118 | NECPLOG(LOG_ERR, "necp_session_delete_policy failed to find policy with id %u", delete_policy_id); |
| 1119 | error = ENOENT; |
| 1120 | goto done; |
| 1121 | } |
| 1122 | |
| 1123 | necp_policy_mark_for_deletion(session, policy); |
| 1124 | done: |
| 1125 | *retval = error; |
| 1126 | return error; |
| 1127 | } |
| 1128 | |
| 1129 | static int |
| 1130 | necp_session_apply_all(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1131 | { |
| 1132 | #pragma unused(uap) |
| 1133 | necp_policy_apply_all(session); |
| 1134 | *retval = 0; |
| 1135 | return 0; |
| 1136 | } |
| 1137 | |
| 1138 | static int |
| 1139 | necp_session_list_all(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1140 | { |
| 1141 | u_int32_t tlv_size = (sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(necp_policy_id)); |
| 1142 | u_int32_t response_size = 0; |
| 1143 | u_int8_t *response = NULL; |
| 1144 | int num_policies = 0; |
| 1145 | int cur_policy_index = 0; |
| 1146 | int error = 0; |
| 1147 | struct necp_session_policy *policy; |
| 1148 | |
| 1149 | LIST_FOREACH(policy, &session->policies, chain) { |
| 1150 | if (!policy->pending_deletion) { |
| 1151 | num_policies++; |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | if (num_policies > NECP_MAX_POLICY_LIST_COUNT) { |
| 1156 | NECPLOG(LOG_ERR, "necp_session_list_all size too large to copy (%u policies)", num_policies); |
| 1157 | error = EINVAL; |
| 1158 | goto done; |
| 1159 | } |
| 1160 | |
| 1161 | response_size = num_policies * tlv_size; |
| 1162 | if (uap->out_buffer_length < response_size || uap->out_buffer == 0) { |
| 1163 | NECPLOG(LOG_ERR, "necp_session_list_all buffer not large enough (%zu < %u)", (size_t)uap->out_buffer_length, response_size); |
| 1164 | error = EINVAL; |
| 1165 | goto done; |
| 1166 | } |
| 1167 | |
| 1168 | // Create a response with one Policy ID TLV for each policy |
| 1169 | response = (u_int8_t *)kalloc_data(response_size, Z_WAITOK | Z_ZERO); |
| 1170 | if (response == NULL) { |
| 1171 | error = ENOMEM; |
| 1172 | goto done; |
| 1173 | } |
| 1174 | |
| 1175 | u_int8_t *cursor = response; |
| 1176 | LIST_FOREACH(policy, &session->policies, chain) { |
| 1177 | if (!policy->pending_deletion && cur_policy_index < num_policies) { |
| 1178 | cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ID, length: sizeof(u_int32_t), value: &policy->local_id, buffer: response, buffer_length: response_size); |
| 1179 | cur_policy_index++; |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | error = copyout(response, uap->out_buffer, response_size); |
| 1184 | if (error != 0) { |
| 1185 | NECPLOG(LOG_ERR, "necp_session_list_all TLV copyout error (%d)", error); |
| 1186 | goto done; |
| 1187 | } |
| 1188 | |
| 1189 | done: |
| 1190 | if (response != NULL) { |
| 1191 | kfree_data(response, response_size); |
| 1192 | response = NULL; |
| 1193 | } |
| 1194 | *retval = error; |
| 1195 | |
| 1196 | return error; |
| 1197 | } |
| 1198 | |
| 1199 | |
| 1200 | static int |
| 1201 | necp_session_delete_all(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1202 | { |
| 1203 | #pragma unused(uap) |
| 1204 | necp_policy_mark_all_for_deletion(session); |
| 1205 | *retval = 0; |
| 1206 | return 0; |
| 1207 | } |
| 1208 | |
| 1209 | static int |
| 1210 | necp_session_set_session_priority(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1211 | { |
| 1212 | int error = 0; |
| 1213 | struct necp_session_policy *policy = NULL; |
| 1214 | struct necp_session_policy *temp_policy = NULL; |
| 1215 | |
| 1216 | if (uap->in_buffer_length < sizeof(necp_session_priority) || uap->in_buffer == 0) { |
| 1217 | NECPLOG(LOG_ERR, "necp_session_set_session_priority invalid input (%zu)", (size_t)uap->in_buffer_length); |
| 1218 | error = EINVAL; |
| 1219 | goto done; |
| 1220 | } |
| 1221 | |
| 1222 | necp_session_priority requested_session_priority = 0; |
| 1223 | error = copyin(uap->in_buffer, &requested_session_priority, sizeof(requested_session_priority)); |
| 1224 | if (error != 0) { |
| 1225 | NECPLOG(LOG_ERR, "necp_session_set_session_priority priority copyin error (%d)", error); |
| 1226 | goto done; |
| 1227 | } |
| 1228 | |
| 1229 | // Enforce special session priorities with entitlements |
| 1230 | if (requested_session_priority == NECP_SESSION_PRIORITY_CONTROL || |
| 1231 | requested_session_priority == NECP_SESSION_PRIORITY_CONTROL_1 || |
| 1232 | requested_session_priority == NECP_SESSION_PRIORITY_PRIVILEGED_TUNNEL || |
| 1233 | requested_session_priority == NECP_SESSION_PRIORITY_HIGH_RESTRICTED) { |
| 1234 | errno_t cred_result = priv_check_cred(cred: kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, flags: 0); |
| 1235 | if (cred_result != 0) { |
| 1236 | NECPLOG(LOG_ERR, "Session does not hold necessary entitlement to claim priority level %d", requested_session_priority); |
| 1237 | error = EPERM; |
| 1238 | goto done; |
| 1239 | } |
| 1240 | } |
| 1241 | |
| 1242 | if (session->session_priority != requested_session_priority) { |
| 1243 | session->session_priority = requested_session_priority; |
| 1244 | session->session_order = necp_allocate_new_session_order(priority: session->session_priority, control_unit: session->control_unit); |
| 1245 | session->dirty = TRUE; |
| 1246 | |
| 1247 | // Mark all policies as needing updates |
| 1248 | LIST_FOREACH_SAFE(policy, &session->policies, chain, temp_policy) { |
| 1249 | policy->pending_update = TRUE; |
| 1250 | } |
| 1251 | } |
| 1252 | |
| 1253 | done: |
| 1254 | *retval = error; |
| 1255 | return error; |
| 1256 | } |
| 1257 | |
| 1258 | static int |
| 1259 | necp_session_lock_to_process(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1260 | { |
| 1261 | #pragma unused(uap) |
| 1262 | session->proc_locked = TRUE; |
| 1263 | *retval = 0; |
| 1264 | return 0; |
| 1265 | } |
| 1266 | |
| 1267 | static int |
| 1268 | necp_session_register_service(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1269 | { |
| 1270 | int error = 0; |
| 1271 | struct necp_service_registration *new_service = NULL; |
| 1272 | |
| 1273 | if (uap->in_buffer_length < sizeof(uuid_t) || uap->in_buffer == 0) { |
| 1274 | NECPLOG(LOG_ERR, "necp_session_register_service invalid input (%zu)", (size_t)uap->in_buffer_length); |
| 1275 | error = EINVAL; |
| 1276 | goto done; |
| 1277 | } |
| 1278 | |
| 1279 | uuid_t service_uuid; |
| 1280 | error = copyin(uap->in_buffer, service_uuid, sizeof(service_uuid)); |
| 1281 | if (error != 0) { |
| 1282 | NECPLOG(LOG_ERR, "necp_session_register_service uuid copyin error (%d)", error); |
| 1283 | goto done; |
| 1284 | } |
| 1285 | |
| 1286 | new_service = kalloc_type(struct necp_service_registration, |
| 1287 | Z_WAITOK | Z_ZERO | Z_NOFAIL); |
| 1288 | |
| 1289 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 1290 | new_service->service_id = necp_create_uuid_service_id_mapping(uuid: service_uuid); |
| 1291 | LIST_INSERT_HEAD(&session->services, new_service, session_chain); |
| 1292 | LIST_INSERT_HEAD(&necp_registered_service_list, new_service, kernel_chain); |
| 1293 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 1294 | |
| 1295 | done: |
| 1296 | *retval = error; |
| 1297 | return error; |
| 1298 | } |
| 1299 | |
| 1300 | static int |
| 1301 | necp_session_unregister_service(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1302 | { |
| 1303 | int error = 0; |
| 1304 | struct necp_service_registration *service = NULL; |
| 1305 | struct necp_service_registration *temp_service = NULL; |
| 1306 | struct necp_uuid_id_mapping *mapping = NULL; |
| 1307 | |
| 1308 | if (uap->in_buffer_length < sizeof(uuid_t) || uap->in_buffer == 0) { |
| 1309 | NECPLOG(LOG_ERR, "necp_session_unregister_service invalid input (%zu)", (size_t)uap->in_buffer_length); |
| 1310 | error = EINVAL; |
| 1311 | goto done; |
| 1312 | } |
| 1313 | |
| 1314 | uuid_t service_uuid; |
| 1315 | error = copyin(uap->in_buffer, service_uuid, sizeof(service_uuid)); |
| 1316 | if (error != 0) { |
| 1317 | NECPLOG(LOG_ERR, "necp_session_unregister_service uuid copyin error (%d)", error); |
| 1318 | goto done; |
| 1319 | } |
| 1320 | |
| 1321 | // Remove all matching services for this session |
| 1322 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 1323 | mapping = necp_uuid_lookup_service_id_locked(uuid: service_uuid); |
| 1324 | if (mapping != NULL) { |
| 1325 | LIST_FOREACH_SAFE(service, &session->services, session_chain, temp_service) { |
| 1326 | if (service->service_id == mapping->id) { |
| 1327 | LIST_REMOVE(service, session_chain); |
| 1328 | LIST_REMOVE(service, kernel_chain); |
| 1329 | kfree_type(struct necp_service_registration, service); |
| 1330 | } |
| 1331 | } |
| 1332 | necp_remove_uuid_service_id_mapping(uuid: service_uuid); |
| 1333 | } |
| 1334 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 1335 | |
| 1336 | done: |
| 1337 | *retval = error; |
| 1338 | return error; |
| 1339 | } |
| 1340 | |
| 1341 | static int |
| 1342 | necp_session_dump_all(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1343 | { |
| 1344 | #pragma unused(session) |
| 1345 | int error = 0; |
| 1346 | |
| 1347 | if (uap->out_buffer_length == 0 || uap->out_buffer == 0) { |
| 1348 | NECPLOG(LOG_ERR, "necp_session_dump_all invalid output buffer (%zu)", (size_t)uap->out_buffer_length); |
| 1349 | error = EINVAL; |
| 1350 | goto done; |
| 1351 | } |
| 1352 | |
| 1353 | error = necp_handle_policy_dump_all(out_buffer: uap->out_buffer, out_buffer_length: uap->out_buffer_length); |
| 1354 | done: |
| 1355 | *retval = error; |
| 1356 | return error; |
| 1357 | } |
| 1358 | |
| 1359 | static int |
| 1360 | necp_session_add_domain_filter(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1361 | { |
| 1362 | int error = 0; |
| 1363 | struct net_bloom_filter *bloom_filter = NULL; |
| 1364 | const size_t in_buffer_length = (size_t)uap->in_buffer_length; |
| 1365 | const size_t out_buffer_length = (size_t)uap->out_buffer_length; |
| 1366 | |
| 1367 | if (in_buffer_length < sizeof(struct net_bloom_filter) || |
| 1368 | in_buffer_length > NECP_MAX_DOMAIN_FILTER_SIZE || |
| 1369 | uap->in_buffer == 0) { |
| 1370 | NECPLOG(LOG_ERR, "necp_session_add_domain_filter invalid input (%zu)", (size_t)in_buffer_length); |
| 1371 | error = EINVAL; |
| 1372 | goto done; |
| 1373 | } |
| 1374 | |
| 1375 | if (out_buffer_length < sizeof(u_int32_t) || uap->out_buffer == 0) { |
| 1376 | NECPLOG(LOG_ERR, "necp_session_add_domain_filter buffer not large enough (%zu)", (size_t)out_buffer_length); |
| 1377 | error = EINVAL; |
| 1378 | goto done; |
| 1379 | } |
| 1380 | |
| 1381 | bloom_filter = (struct net_bloom_filter *)kalloc_data(in_buffer_length, Z_WAITOK | Z_ZERO); |
| 1382 | if (bloom_filter == NULL) { |
| 1383 | NECPLOG(LOG_ERR, "necp_session_add_domain_filter allocate filter error (%zu)", in_buffer_length); |
| 1384 | error = ENOMEM; |
| 1385 | goto done; |
| 1386 | } |
| 1387 | |
| 1388 | error = copyin(uap->in_buffer, bloom_filter, in_buffer_length); |
| 1389 | if (error != 0) { |
| 1390 | NECPLOG(LOG_ERR, "necp_session_add_domain_filter filter copyin error (%d)", error); |
| 1391 | goto done; |
| 1392 | } |
| 1393 | |
| 1394 | size_t expected_filter_size = net_bloom_filter_get_size(num_bits: bloom_filter->b_table_num_bits); |
| 1395 | if (expected_filter_size != in_buffer_length) { |
| 1396 | NECPLOG(LOG_ERR, "necp_session_add_domain_filter size mismatch (%zu != %zu)", expected_filter_size, in_buffer_length); |
| 1397 | error = EINVAL; |
| 1398 | goto done; |
| 1399 | } |
| 1400 | |
| 1401 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 1402 | u_int32_t filter_id = necp_create_domain_filter(list: &necp_global_domain_filter_list, owner_list: &session->domain_filters, filter: bloom_filter); |
| 1403 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 1404 | |
| 1405 | if (filter_id == 0) { |
| 1406 | error = ENOMEM; |
| 1407 | } else { |
| 1408 | // Bloom filter is taken over by the new filter entry, clear the local pointer |
| 1409 | bloom_filter = NULL; |
| 1410 | |
| 1411 | error = copyout(&filter_id, uap->out_buffer, sizeof(filter_id)); |
| 1412 | if (error != 0) { |
| 1413 | NECPLOG(LOG_ERR, "necp_session_add_domain_filter ID copyout error (%d)", error); |
| 1414 | goto done; |
| 1415 | } |
| 1416 | } |
| 1417 | |
| 1418 | done: |
| 1419 | *retval = error; |
| 1420 | if (error != 0 && bloom_filter != NULL) { |
| 1421 | uint8_t *filter_buffer = (uint8_t *)bloom_filter; |
| 1422 | kfree_data(filter_buffer, in_buffer_length); |
| 1423 | bloom_filter = NULL; |
| 1424 | } |
| 1425 | return error; |
| 1426 | } |
| 1427 | |
| 1428 | static int |
| 1429 | necp_session_remove_domain_filter(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1430 | { |
| 1431 | int error = 0; |
| 1432 | |
| 1433 | const size_t in_buffer_length = (size_t)uap->in_buffer_length; |
| 1434 | if (in_buffer_length < sizeof(u_int32_t) || uap->in_buffer == 0) { |
| 1435 | NECPLOG(LOG_ERR, "necp_session_remove_domain_filter invalid input (%zu)", (size_t)in_buffer_length); |
| 1436 | error = EINVAL; |
| 1437 | goto done; |
| 1438 | } |
| 1439 | |
| 1440 | u_int32_t filter_id; |
| 1441 | error = copyin(uap->in_buffer, &filter_id, sizeof(filter_id)); |
| 1442 | if (error != 0) { |
| 1443 | NECPLOG(LOG_ERR, "necp_session_remove_domain_filter uuid copyin error (%d)", error); |
| 1444 | goto done; |
| 1445 | } |
| 1446 | |
| 1447 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 1448 | bool removed = necp_remove_domain_filter(list: &necp_global_domain_filter_list, owner_list: &session->domain_filters, filter_id); |
| 1449 | if (!removed) { |
| 1450 | error = ENOENT; |
| 1451 | } |
| 1452 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 1453 | |
| 1454 | done: |
| 1455 | *retval = error; |
| 1456 | return error; |
| 1457 | } |
| 1458 | |
| 1459 | static int |
| 1460 | necp_session_remove_all_domain_filters(struct necp_session *session, struct necp_session_action_args *uap, int *retval) |
| 1461 | { |
| 1462 | #pragma unused(uap) |
| 1463 | |
| 1464 | struct necp_domain_filter *filter = NULL; |
| 1465 | struct necp_domain_filter *temp_filter = NULL; |
| 1466 | LIST_FOREACH_SAFE(filter, &session->domain_filters, owner_chain, temp_filter) { |
| 1467 | if (os_ref_release_locked(rc: &filter->refcount) == 0) { |
| 1468 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 1469 | LIST_REMOVE(filter, chain); |
| 1470 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 1471 | LIST_REMOVE(filter, owner_chain); |
| 1472 | net_bloom_filter_destroy(filter: filter->filter); |
| 1473 | kfree_type(struct necp_domain_filter, filter); |
| 1474 | } |
| 1475 | } |
| 1476 | |
| 1477 | *retval = 0; |
| 1478 | return 0; |
| 1479 | } |
| 1480 | |
| 1481 | int |
| 1482 | necp_session_action(struct proc *p, struct necp_session_action_args *uap, int *retval) |
| 1483 | { |
| 1484 | struct fileproc *fp; |
| 1485 | int error = 0; |
| 1486 | int return_value = 0; |
| 1487 | struct necp_session *session = NULL; |
| 1488 | |
| 1489 | error = necp_session_find_from_fd(p, fd: uap->necp_fd, fpp: &fp, session: &session); |
| 1490 | if (error != 0) { |
| 1491 | NECPLOG(LOG_ERR, "necp_session_action find fd error (%d)", error); |
| 1492 | return error; |
| 1493 | } |
| 1494 | |
| 1495 | NECP_SESSION_LOCK(session); |
| 1496 | |
| 1497 | if (session->proc_locked) { |
| 1498 | // Verify that the calling process is allowed to do actions |
| 1499 | uuid_t proc_uuid; |
| 1500 | proc_getexecutableuuid(current_proc(), proc_uuid, sizeof(proc_uuid)); |
| 1501 | if (uuid_compare(uu1: proc_uuid, uu2: session->proc_uuid) != 0) { |
| 1502 | error = EPERM; |
| 1503 | goto done; |
| 1504 | } |
| 1505 | } else { |
| 1506 | // If not locked, update the proc_uuid and proc_pid of the session |
| 1507 | proc_getexecutableuuid(current_proc(), session->proc_uuid, sizeof(session->proc_uuid)); |
| 1508 | session->proc_pid = proc_pid(current_proc()); |
| 1509 | } |
| 1510 | |
| 1511 | u_int32_t action = uap->action; |
| 1512 | switch (action) { |
| 1513 | case NECP_SESSION_ACTION_POLICY_ADD: { |
| 1514 | return_value = necp_session_add_policy(session, uap, retval); |
| 1515 | break; |
| 1516 | } |
| 1517 | case NECP_SESSION_ACTION_POLICY_GET: { |
| 1518 | return_value = necp_session_get_policy(session, uap, retval); |
| 1519 | break; |
| 1520 | } |
| 1521 | case NECP_SESSION_ACTION_POLICY_DELETE: { |
| 1522 | return_value = necp_session_delete_policy(session, uap, retval); |
| 1523 | break; |
| 1524 | } |
| 1525 | case NECP_SESSION_ACTION_POLICY_APPLY_ALL: { |
| 1526 | return_value = necp_session_apply_all(session, uap, retval); |
| 1527 | break; |
| 1528 | } |
| 1529 | case NECP_SESSION_ACTION_POLICY_LIST_ALL: { |
| 1530 | return_value = necp_session_list_all(session, uap, retval); |
| 1531 | break; |
| 1532 | } |
| 1533 | case NECP_SESSION_ACTION_POLICY_DELETE_ALL: { |
| 1534 | return_value = necp_session_delete_all(session, uap, retval); |
| 1535 | break; |
| 1536 | } |
| 1537 | case NECP_SESSION_ACTION_SET_SESSION_PRIORITY: { |
| 1538 | return_value = necp_session_set_session_priority(session, uap, retval); |
| 1539 | break; |
| 1540 | } |
| 1541 | case NECP_SESSION_ACTION_LOCK_SESSION_TO_PROC: { |
| 1542 | return_value = necp_session_lock_to_process(session, uap, retval); |
| 1543 | break; |
| 1544 | } |
| 1545 | case NECP_SESSION_ACTION_REGISTER_SERVICE: { |
| 1546 | return_value = necp_session_register_service(session, uap, retval); |
| 1547 | break; |
| 1548 | } |
| 1549 | case NECP_SESSION_ACTION_UNREGISTER_SERVICE: { |
| 1550 | return_value = necp_session_unregister_service(session, uap, retval); |
| 1551 | break; |
| 1552 | } |
| 1553 | case NECP_SESSION_ACTION_POLICY_DUMP_ALL: { |
| 1554 | return_value = necp_session_dump_all(session, uap, retval); |
| 1555 | break; |
| 1556 | } |
| 1557 | case NECP_SESSION_ACTION_ADD_DOMAIN_FILTER: { |
| 1558 | return_value = necp_session_add_domain_filter(session, uap, retval); |
| 1559 | break; |
| 1560 | } |
| 1561 | case NECP_SESSION_ACTION_REMOVE_DOMAIN_FILTER: { |
| 1562 | return_value = necp_session_remove_domain_filter(session, uap, retval); |
| 1563 | break; |
| 1564 | } |
| 1565 | case NECP_SESSION_ACTION_REMOVE_ALL_DOMAIN_FILTERS: { |
| 1566 | return_value = necp_session_remove_all_domain_filters(session, uap, retval); |
| 1567 | break; |
| 1568 | } |
| 1569 | default: { |
| 1570 | NECPLOG(LOG_ERR, "necp_session_action unknown action (%u)", action); |
| 1571 | return_value = EINVAL; |
| 1572 | break; |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | done: |
| 1577 | NECP_SESSION_UNLOCK(session); |
| 1578 | fp_drop(p, fd: uap->necp_fd, fp, locked: 0); |
| 1579 | return return_value; |
| 1580 | } |
| 1581 | |
| 1582 | struct necp_resolver_key_state { |
| 1583 | const struct ccdigest_info *digest_info; |
| 1584 | uint8_t key[CCSHA256_OUTPUT_SIZE]; |
| 1585 | }; |
| 1586 | static struct necp_resolver_key_state s_necp_resolver_key_state; |
| 1587 | |
| 1588 | static void |
| 1589 | necp_generate_resolver_key(void) |
| 1590 | { |
| 1591 | s_necp_resolver_key_state.digest_info = ccsha256_di(); |
| 1592 | cc_rand_generate(out: s_necp_resolver_key_state.key, outlen: sizeof(s_necp_resolver_key_state.key)); |
| 1593 | } |
| 1594 | |
| 1595 | static void |
| 1596 | necp_sign_update_context(const struct ccdigest_info *di, |
| 1597 | cchmac_ctx_t ctx, |
| 1598 | uuid_t client_id, |
| 1599 | u_int32_t sign_type, |
| 1600 | u_int8_t *data, |
| 1601 | size_t data_length) |
| 1602 | { |
| 1603 | const uint8_t context[32] = {[0 ... 31] = 0x20}; // 0x20 repeated 32 times |
| 1604 | const char *context_string = "NECP Resolver Binder"; |
| 1605 | uint8_t separator = 0; |
| 1606 | cchmac_update(di, ctx, data_len: sizeof(context), data: context); |
| 1607 | cchmac_update(di, ctx, data_len: strlen(s: context_string), data: context_string); |
| 1608 | cchmac_update(di, ctx, data_len: sizeof(separator), data: &separator); |
| 1609 | cchmac_update(di, ctx, data_len: sizeof(uuid_t), data: client_id); |
| 1610 | cchmac_update(di, ctx, data_len: sizeof(sign_type), data: &sign_type); |
| 1611 | cchmac_update(di, ctx, data_len: data_length, data); |
| 1612 | } |
| 1613 | |
| 1614 | int |
| 1615 | necp_sign_resolver_answer(uuid_t client_id, u_int32_t sign_type, |
| 1616 | u_int8_t *data, size_t data_length, |
| 1617 | u_int8_t *tag, size_t *out_tag_length) |
| 1618 | { |
| 1619 | if (s_necp_resolver_key_state.digest_info == NULL) { |
| 1620 | return EINVAL; |
| 1621 | } |
| 1622 | |
| 1623 | if (data == NULL || |
| 1624 | data_length == 0 || |
| 1625 | tag == NULL || |
| 1626 | out_tag_length == NULL) { |
| 1627 | return EINVAL; |
| 1628 | } |
| 1629 | |
| 1630 | size_t required_tag_length = s_necp_resolver_key_state.digest_info->output_size; |
| 1631 | if (*out_tag_length < required_tag_length) { |
| 1632 | return ERANGE; |
| 1633 | } |
| 1634 | |
| 1635 | *out_tag_length = required_tag_length; |
| 1636 | |
| 1637 | cchmac_ctx_decl(s_necp_resolver_key_state.digest_info->state_size, |
| 1638 | s_necp_resolver_key_state.digest_info->block_size, ctx); |
| 1639 | cchmac_init(di: s_necp_resolver_key_state.digest_info, ctx, |
| 1640 | key_len: sizeof(s_necp_resolver_key_state.key), |
| 1641 | key: s_necp_resolver_key_state.key); |
| 1642 | necp_sign_update_context(di: s_necp_resolver_key_state.digest_info, |
| 1643 | ctx, client_id, sign_type, data, data_length); |
| 1644 | cchmac_final(di: s_necp_resolver_key_state.digest_info, ctx, mac: tag); |
| 1645 | |
| 1646 | return 0; |
| 1647 | } |
| 1648 | |
| 1649 | bool |
| 1650 | necp_validate_resolver_answer(uuid_t client_id, u_int32_t sign_type, |
| 1651 | u_int8_t *data, size_t data_length, |
| 1652 | u_int8_t *tag, size_t tag_length) |
| 1653 | { |
| 1654 | if (s_necp_resolver_key_state.digest_info == NULL) { |
| 1655 | return false; |
| 1656 | } |
| 1657 | |
| 1658 | if (data == NULL || |
| 1659 | data_length == 0 || |
| 1660 | tag == NULL || |
| 1661 | tag_length == 0) { |
| 1662 | return false; |
| 1663 | } |
| 1664 | |
| 1665 | size_t required_tag_length = s_necp_resolver_key_state.digest_info->output_size; |
| 1666 | if (tag_length != required_tag_length) { |
| 1667 | return false; |
| 1668 | } |
| 1669 | |
| 1670 | uint8_t actual_tag[required_tag_length]; |
| 1671 | |
| 1672 | cchmac_ctx_decl(s_necp_resolver_key_state.digest_info->state_size, |
| 1673 | s_necp_resolver_key_state.digest_info->block_size, ctx); |
| 1674 | cchmac_init(di: s_necp_resolver_key_state.digest_info, ctx, |
| 1675 | key_len: sizeof(s_necp_resolver_key_state.key), |
| 1676 | key: s_necp_resolver_key_state.key); |
| 1677 | necp_sign_update_context(di: s_necp_resolver_key_state.digest_info, |
| 1678 | ctx, client_id, sign_type, data, data_length); |
| 1679 | cchmac_final(di: s_necp_resolver_key_state.digest_info, ctx, mac: actual_tag); |
| 1680 | |
| 1681 | return cc_cmp_safe(num: s_necp_resolver_key_state.digest_info->output_size, ptr1: tag, ptr2: actual_tag) == 0; |
| 1682 | } |
| 1683 | |
| 1684 | struct necp_application_id_key_state { |
| 1685 | const struct ccdigest_info *digest_info; |
| 1686 | uint8_t key[CCSHA256_OUTPUT_SIZE]; |
| 1687 | }; |
| 1688 | static struct necp_application_id_key_state s_necp_application_id_key_state; |
| 1689 | |
| 1690 | static void |
| 1691 | necp_generate_application_id_key(void) |
| 1692 | { |
| 1693 | s_necp_application_id_key_state.digest_info = ccsha256_di(); |
| 1694 | cc_rand_generate(out: s_necp_application_id_key_state.key, outlen: sizeof(s_necp_application_id_key_state.key)); |
| 1695 | } |
| 1696 | |
| 1697 | static void |
| 1698 | necp_sign_application_id_update_context(const struct ccdigest_info *di, |
| 1699 | cchmac_ctx_t ctx, |
| 1700 | uuid_t client_id, |
| 1701 | u_int32_t sign_type) |
| 1702 | { |
| 1703 | const uint8_t context[32] = {[0 ... 31] = 0x20}; // 0x20 repeated 32 times |
| 1704 | const char *context_string = "NECP Application ID"; |
| 1705 | uint8_t separator = 0; |
| 1706 | cchmac_update(di, ctx, data_len: sizeof(context), data: context); |
| 1707 | cchmac_update(di, ctx, data_len: strlen(s: context_string), data: context_string); |
| 1708 | cchmac_update(di, ctx, data_len: sizeof(separator), data: &separator); |
| 1709 | cchmac_update(di, ctx, data_len: sizeof(uuid_t), data: client_id); |
| 1710 | cchmac_update(di, ctx, data_len: sizeof(sign_type), data: &sign_type); |
| 1711 | } |
| 1712 | |
| 1713 | int |
| 1714 | necp_sign_application_id(uuid_t client_id, u_int32_t sign_type, |
| 1715 | u_int8_t *tag, size_t *out_tag_length) |
| 1716 | { |
| 1717 | if (s_necp_application_id_key_state.digest_info == NULL) { |
| 1718 | return EINVAL; |
| 1719 | } |
| 1720 | |
| 1721 | if (tag == NULL || |
| 1722 | out_tag_length == NULL) { |
| 1723 | return EINVAL; |
| 1724 | } |
| 1725 | |
| 1726 | size_t required_tag_length = s_necp_application_id_key_state.digest_info->output_size; |
| 1727 | if (*out_tag_length < required_tag_length) { |
| 1728 | return ERANGE; |
| 1729 | } |
| 1730 | |
| 1731 | *out_tag_length = required_tag_length; |
| 1732 | |
| 1733 | cchmac_ctx_decl(s_necp_application_id_key_state.digest_info->state_size, |
| 1734 | s_necp_application_id_key_state.digest_info->block_size, ctx); |
| 1735 | cchmac_init(di: s_necp_application_id_key_state.digest_info, ctx, |
| 1736 | key_len: sizeof(s_necp_application_id_key_state.key), |
| 1737 | key: s_necp_application_id_key_state.key); |
| 1738 | necp_sign_application_id_update_context(di: s_necp_application_id_key_state.digest_info, |
| 1739 | ctx, client_id, sign_type); |
| 1740 | cchmac_final(di: s_necp_application_id_key_state.digest_info, ctx, mac: tag); |
| 1741 | |
| 1742 | return 0; |
| 1743 | } |
| 1744 | |
| 1745 | bool |
| 1746 | necp_validate_application_id(uuid_t client_id, u_int32_t sign_type, |
| 1747 | u_int8_t *tag, size_t tag_length) |
| 1748 | { |
| 1749 | if (s_necp_application_id_key_state.digest_info == NULL) { |
| 1750 | return false; |
| 1751 | } |
| 1752 | |
| 1753 | if (tag == NULL || |
| 1754 | tag_length == 0) { |
| 1755 | return false; |
| 1756 | } |
| 1757 | |
| 1758 | size_t required_tag_length = s_necp_application_id_key_state.digest_info->output_size; |
| 1759 | if (tag_length != required_tag_length) { |
| 1760 | return false; |
| 1761 | } |
| 1762 | |
| 1763 | uint8_t actual_tag[required_tag_length]; |
| 1764 | |
| 1765 | cchmac_ctx_decl(s_necp_application_id_key_state.digest_info->state_size, |
| 1766 | s_necp_application_id_key_state.digest_info->block_size, ctx); |
| 1767 | cchmac_init(di: s_necp_application_id_key_state.digest_info, ctx, |
| 1768 | key_len: sizeof(s_necp_application_id_key_state.key), |
| 1769 | key: s_necp_application_id_key_state.key); |
| 1770 | necp_sign_application_id_update_context(di: s_necp_application_id_key_state.digest_info, |
| 1771 | ctx, client_id, sign_type); |
| 1772 | cchmac_final(di: s_necp_application_id_key_state.digest_info, ctx, mac: actual_tag); |
| 1773 | |
| 1774 | return cc_cmp_safe(num: s_necp_application_id_key_state.digest_info->output_size, ptr1: tag, ptr2: actual_tag) == 0; |
| 1775 | } |
| 1776 | |
| 1777 | void |
| 1778 | necp_init(void) |
| 1779 | { |
| 1780 | necp_log_handle = os_log_create(subsystem: "com.apple.xnu.net.necp", category: "necp"); |
| 1781 | necp_data_trace_log_handle = os_log_create(subsystem: "com.apple.xnu.net.necp", category: "necp-data-trace"); |
| 1782 | |
| 1783 | necp_client_init(); |
| 1784 | |
| 1785 | TAILQ_INIT(&necp_session_list); |
| 1786 | |
| 1787 | LIST_INIT(&necp_kernel_socket_policies); |
| 1788 | LIST_INIT(&necp_kernel_ip_output_policies); |
| 1789 | |
| 1790 | LIST_INIT(&necp_account_id_list); |
| 1791 | |
| 1792 | LIST_INIT(&necp_uuid_service_id_list); |
| 1793 | |
| 1794 | LIST_INIT(&necp_registered_service_list); |
| 1795 | |
| 1796 | LIST_INIT(&necp_route_rules); |
| 1797 | LIST_INIT(&necp_aggregate_route_rules); |
| 1798 | |
| 1799 | LIST_INIT(&necp_global_domain_filter_list); |
| 1800 | |
| 1801 | necp_generate_resolver_key(); |
| 1802 | necp_generate_application_id_key(); |
| 1803 | |
| 1804 | necp_uuid_app_id_hashtbl = hashinit(NECP_UUID_APP_ID_HASH_SIZE, M_NECP, hashmask: &necp_uuid_app_id_hash_mask); |
| 1805 | necp_uuid_app_id_hash_num_buckets = necp_uuid_app_id_hash_mask + 1; |
| 1806 | necp_num_uuid_app_id_mappings = 0; |
| 1807 | necp_uuid_app_id_mappings_dirty = FALSE; |
| 1808 | |
| 1809 | necp_kernel_application_policies_condition_mask = 0; |
| 1810 | necp_kernel_socket_policies_condition_mask = 0; |
| 1811 | necp_kernel_ip_output_policies_condition_mask = 0; |
| 1812 | |
| 1813 | necp_kernel_application_policies_count = 0; |
| 1814 | necp_kernel_socket_policies_count = 0; |
| 1815 | necp_kernel_socket_policies_non_app_count = 0; |
| 1816 | necp_kernel_ip_output_policies_count = 0; |
| 1817 | necp_kernel_ip_output_policies_non_id_count = 0; |
| 1818 | |
| 1819 | necp_kernel_socket_policies_gencount = 1; |
| 1820 | |
| 1821 | memset(s: &necp_kernel_socket_policies_map, c: 0, n: sizeof(necp_kernel_socket_policies_map)); |
| 1822 | memset(s: &necp_kernel_ip_output_policies_map, c: 0, n: sizeof(necp_kernel_ip_output_policies_map)); |
| 1823 | necp_kernel_socket_policies_app_layer_map = NULL; |
| 1824 | |
| 1825 | necp_drop_unentitled_order = necp_get_first_order_for_priority(priority: necp_drop_unentitled_level); |
| 1826 | necp_drop_management_order = necp_get_first_order_for_priority(priority: necp_drop_management_level); |
| 1827 | } |
| 1828 | |
| 1829 | static void |
| 1830 | necp_post_change_event(struct kev_necp_policies_changed_data *necp_event_data) |
| 1831 | { |
| 1832 | struct kev_msg ev_msg; |
| 1833 | memset(s: &ev_msg, c: 0, n: sizeof(ev_msg)); |
| 1834 | |
| 1835 | ev_msg.vendor_code = KEV_VENDOR_APPLE; |
| 1836 | ev_msg.kev_class = KEV_NETWORK_CLASS; |
| 1837 | ev_msg.kev_subclass = KEV_NECP_SUBCLASS; |
| 1838 | ev_msg.event_code = KEV_NECP_POLICIES_CHANGED; |
| 1839 | |
| 1840 | ev_msg.dv[0].data_ptr = necp_event_data; |
| 1841 | ev_msg.dv[0].data_length = sizeof(necp_event_data->changed_count); |
| 1842 | ev_msg.dv[1].data_length = 0; |
| 1843 | |
| 1844 | kev_post_msg(event: &ev_msg); |
| 1845 | } |
| 1846 | |
| 1847 | static inline bool |
| 1848 | necp_buffer_write_tlv_validate(u_int8_t *cursor, u_int8_t type, u_int32_t length, |
| 1849 | u_int8_t *buffer, u_int32_t buffer_length) |
| 1850 | { |
| 1851 | if (cursor < buffer || (uintptr_t)(cursor - buffer) > buffer_length) { |
| 1852 | NECPLOG0(LOG_ERR, "Cannot write TLV in buffer (invalid cursor)"); |
| 1853 | return false; |
| 1854 | } |
| 1855 | u_int8_t *next_tlv = (u_int8_t *)(cursor + sizeof(type) + sizeof(length) + length); |
| 1856 | if (next_tlv <= buffer || // make sure the next TLV start doesn't overflow |
| 1857 | (uintptr_t)(next_tlv - buffer) > buffer_length) { // make sure the next TLV has enough room in buffer |
| 1858 | NECPLOG(LOG_ERR, "Cannot write TLV in buffer (TLV length %u, buffer length %u)", |
| 1859 | length, buffer_length); |
| 1860 | return false; |
| 1861 | } |
| 1862 | return true; |
| 1863 | } |
| 1864 | |
| 1865 | u_int8_t * |
| 1866 | necp_buffer_write_tlv_if_different(u_int8_t *cursor, u_int8_t type, |
| 1867 | u_int32_t length, const void *value, bool *updated, |
| 1868 | u_int8_t *buffer, u_int32_t buffer_length) |
| 1869 | { |
| 1870 | if (!necp_buffer_write_tlv_validate(cursor, type, length, buffer, buffer_length)) { |
| 1871 | // If we can't fit this TLV, return the current cursor |
| 1872 | return cursor; |
| 1873 | } |
| 1874 | u_int8_t *next_tlv = (u_int8_t *)(cursor + sizeof(type) + sizeof(length) + length); |
| 1875 | if (*updated || *(u_int8_t *)(cursor) != type) { |
| 1876 | *(u_int8_t *)(cursor) = type; |
| 1877 | *updated = TRUE; |
| 1878 | } |
| 1879 | if (*updated || *(u_int32_t *)(void *)(cursor + sizeof(type)) != length) { |
| 1880 | *(u_int32_t *)(void *)(cursor + sizeof(type)) = length; |
| 1881 | *updated = TRUE; |
| 1882 | } |
| 1883 | if (length > 0) { |
| 1884 | if (*updated || memcmp(s1: (u_int8_t *)(cursor + sizeof(type) + sizeof(length)), s2: value, n: length) != 0) { |
| 1885 | memcpy(dst: (u_int8_t *)(cursor + sizeof(type) + sizeof(length)), src: value, n: length); |
| 1886 | *updated = TRUE; |
| 1887 | } |
| 1888 | } |
| 1889 | return next_tlv; |
| 1890 | } |
| 1891 | |
| 1892 | u_int8_t * |
| 1893 | necp_buffer_write_tlv(u_int8_t *cursor, u_int8_t type, |
| 1894 | u_int32_t length, const void *value, |
| 1895 | u_int8_t *buffer, u_int32_t buffer_length) |
| 1896 | { |
| 1897 | if (!necp_buffer_write_tlv_validate(cursor, type, length, buffer, buffer_length)) { |
| 1898 | return NULL; |
| 1899 | } |
| 1900 | u_int8_t *next_tlv = (u_int8_t *)(cursor + sizeof(type) + sizeof(length) + length); |
| 1901 | *(u_int8_t *)(cursor) = type; |
| 1902 | *(u_int32_t *)(void *)(cursor + sizeof(type)) = length; |
| 1903 | if (length > 0) { |
| 1904 | memcpy(dst: (u_int8_t *)(cursor + sizeof(type) + sizeof(length)), src: value, n: length); |
| 1905 | } |
| 1906 | |
| 1907 | return next_tlv; |
| 1908 | } |
| 1909 | |
| 1910 | u_int8_t |
| 1911 | necp_buffer_get_tlv_type(u_int8_t *buffer, int tlv_offset) |
| 1912 | { |
| 1913 | u_int8_t *type = NULL; |
| 1914 | |
| 1915 | if (buffer == NULL) { |
| 1916 | return 0; |
| 1917 | } |
| 1918 | |
| 1919 | type = (u_int8_t *)((u_int8_t *)buffer + tlv_offset); |
| 1920 | return type ? *type : 0; |
| 1921 | } |
| 1922 | |
| 1923 | u_int32_t |
| 1924 | necp_buffer_get_tlv_length(u_int8_t *buffer, int tlv_offset) |
| 1925 | { |
| 1926 | u_int32_t *length = NULL; |
| 1927 | |
| 1928 | if (buffer == NULL) { |
| 1929 | return 0; |
| 1930 | } |
| 1931 | |
| 1932 | length = (u_int32_t *)(void *)((u_int8_t *)buffer + tlv_offset + sizeof(u_int8_t)); |
| 1933 | return length ? *length : 0; |
| 1934 | } |
| 1935 | |
| 1936 | u_int8_t * |
| 1937 | necp_buffer_get_tlv_value(u_int8_t *buffer, int tlv_offset, u_int32_t *value_size) |
| 1938 | { |
| 1939 | u_int8_t *value = NULL; |
| 1940 | u_int32_t length = necp_buffer_get_tlv_length(buffer, tlv_offset); |
| 1941 | if (length == 0) { |
| 1942 | return value; |
| 1943 | } |
| 1944 | |
| 1945 | if (value_size) { |
| 1946 | *value_size = length; |
| 1947 | } |
| 1948 | |
| 1949 | value = (u_int8_t *)((u_int8_t *)buffer + tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t)); |
| 1950 | return value; |
| 1951 | } |
| 1952 | |
| 1953 | int |
| 1954 | necp_buffer_find_tlv(u_int8_t *buffer, u_int32_t buffer_length, int offset, u_int8_t type, int *err, int next) |
| 1955 | { |
| 1956 | if (err != NULL) { |
| 1957 | *err = ENOENT; |
| 1958 | } |
| 1959 | if (offset < 0) { |
| 1960 | if (err != NULL) { |
| 1961 | *err = EINVAL; |
| 1962 | } |
| 1963 | return -1; |
| 1964 | } |
| 1965 | int cursor = offset; |
| 1966 | int next_cursor; |
| 1967 | u_int32_t curr_length; |
| 1968 | u_int8_t curr_type; |
| 1969 | |
| 1970 | while (TRUE) { |
| 1971 | if ((((u_int32_t)cursor) + sizeof(curr_type) + sizeof(curr_length)) > buffer_length) { |
| 1972 | return -1; |
| 1973 | } |
| 1974 | if (!next) { |
| 1975 | curr_type = necp_buffer_get_tlv_type(buffer, tlv_offset: cursor); |
| 1976 | } else { |
| 1977 | next = 0; |
| 1978 | curr_type = NECP_TLV_NIL; |
| 1979 | } |
| 1980 | curr_length = necp_buffer_get_tlv_length(buffer, tlv_offset: cursor); |
| 1981 | if (curr_length > buffer_length - ((u_int32_t)cursor + sizeof(curr_type) + sizeof(curr_length))) { |
| 1982 | return -1; |
| 1983 | } |
| 1984 | |
| 1985 | next_cursor = (cursor + sizeof(curr_type) + sizeof(curr_length) + curr_length); |
| 1986 | if (curr_type == type) { |
| 1987 | // check if entire TLV fits inside buffer |
| 1988 | if (((u_int32_t)next_cursor) <= buffer_length) { |
| 1989 | if (err != NULL) { |
| 1990 | *err = 0; |
| 1991 | } |
| 1992 | return cursor; |
| 1993 | } else { |
| 1994 | return -1; |
| 1995 | } |
| 1996 | } |
| 1997 | cursor = next_cursor; |
| 1998 | } |
| 1999 | } |
| 2000 | |
| 2001 | static int |
| 2002 | necp_find_tlv(u_int8_t *buffer, u_int32_t buffer_length, int offset, u_int8_t type, int *err, int next) |
| 2003 | { |
| 2004 | int cursor = -1; |
| 2005 | if (buffer != NULL) { |
| 2006 | cursor = necp_buffer_find_tlv(buffer, buffer_length, offset, type, err, next); |
| 2007 | } |
| 2008 | return cursor; |
| 2009 | } |
| 2010 | |
| 2011 | static int |
| 2012 | necp_get_tlv_at_offset(u_int8_t *buffer, u_int32_t buffer_length, |
| 2013 | int tlv_offset, u_int32_t out_buffer_length, void *out_buffer, u_int32_t *value_size) |
| 2014 | { |
| 2015 | if (buffer == NULL) { |
| 2016 | NECPLOG0(LOG_ERR, "necp_get_tlv_at_offset buffer is NULL"); |
| 2017 | return EINVAL; |
| 2018 | } |
| 2019 | |
| 2020 | // Handle buffer parsing |
| 2021 | |
| 2022 | // Validate that buffer has enough room for any TLV |
| 2023 | if (tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t) > buffer_length) { |
| 2024 | NECPLOG(LOG_ERR, "necp_get_tlv_at_offset buffer_length is too small for TLV (%u < %lu)", |
| 2025 | buffer_length, tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t)); |
| 2026 | return EINVAL; |
| 2027 | } |
| 2028 | |
| 2029 | // Validate that buffer has enough room for this TLV |
| 2030 | u_int32_t tlv_length = necp_buffer_get_tlv_length(buffer, tlv_offset); |
| 2031 | if (tlv_length > buffer_length - (tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t))) { |
| 2032 | NECPLOG(LOG_ERR, "necp_get_tlv_at_offset buffer_length is too small for TLV of length %u (%u < %lu)", |
| 2033 | tlv_length, buffer_length, tlv_offset + sizeof(u_int8_t) + sizeof(u_int32_t) + tlv_length); |
| 2034 | return EINVAL; |
| 2035 | } |
| 2036 | |
| 2037 | if (out_buffer != NULL && out_buffer_length > 0) { |
| 2038 | // Validate that out buffer is large enough for value |
| 2039 | if (out_buffer_length < tlv_length) { |
| 2040 | NECPLOG(LOG_ERR, "necp_get_tlv_at_offset out_buffer_length is too small for TLV value (%u < %u)", |
| 2041 | out_buffer_length, tlv_length); |
| 2042 | return EINVAL; |
| 2043 | } |
| 2044 | |
| 2045 | // Get value pointer |
| 2046 | u_int8_t *tlv_value = necp_buffer_get_tlv_value(buffer, tlv_offset, NULL); |
| 2047 | if (tlv_value == NULL) { |
| 2048 | NECPLOG0(LOG_ERR, "necp_get_tlv_at_offset tlv_value is NULL"); |
| 2049 | return ENOENT; |
| 2050 | } |
| 2051 | |
| 2052 | // Copy value |
| 2053 | memcpy(dst: out_buffer, src: tlv_value, n: tlv_length); |
| 2054 | } |
| 2055 | |
| 2056 | // Copy out length |
| 2057 | if (value_size != NULL) { |
| 2058 | *value_size = tlv_length; |
| 2059 | } |
| 2060 | |
| 2061 | return 0; |
| 2062 | } |
| 2063 | |
| 2064 | static int |
| 2065 | necp_get_tlv(u_int8_t *buffer, u_int32_t buffer_length, |
| 2066 | int offset, u_int8_t type, u_int32_t buff_len, void *buff, u_int32_t *value_size) |
| 2067 | { |
| 2068 | int error = 0; |
| 2069 | |
| 2070 | int tlv_offset = necp_find_tlv(buffer, buffer_length, offset, type, err: &error, next: 0); |
| 2071 | if (tlv_offset < 0) { |
| 2072 | return error; |
| 2073 | } |
| 2074 | |
| 2075 | return necp_get_tlv_at_offset(buffer, buffer_length, tlv_offset, out_buffer_length: buff_len, out_buffer: buff, value_size); |
| 2076 | } |
| 2077 | |
| 2078 | // Session Management |
| 2079 | |
| 2080 | static struct necp_session * |
| 2081 | necp_create_session(void) |
| 2082 | { |
| 2083 | struct necp_session *new_session = NULL; |
| 2084 | |
| 2085 | new_session = kalloc_type(struct necp_session, |
| 2086 | Z_WAITOK | Z_ZERO | Z_NOFAIL); |
| 2087 | |
| 2088 | new_session->necp_fd_type = necp_fd_type_session; |
| 2089 | new_session->session_priority = NECP_SESSION_PRIORITY_UNKNOWN; |
| 2090 | new_session->dirty = FALSE; |
| 2091 | LIST_INIT(&new_session->policies); |
| 2092 | LIST_INIT(&new_session->services); |
| 2093 | LIST_INIT(&new_session->domain_filters); |
| 2094 | lck_mtx_init(lck: &new_session->lock, grp: &necp_kernel_policy_mtx_grp, attr: &necp_kernel_policy_mtx_attr); |
| 2095 | |
| 2096 | // Take the lock |
| 2097 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 2098 | |
| 2099 | // Find the next available control unit |
| 2100 | u_int32_t control_unit = 1; |
| 2101 | struct necp_session *next_session = NULL; |
| 2102 | TAILQ_FOREACH(next_session, &necp_session_list, chain) { |
| 2103 | if (next_session->control_unit > control_unit) { |
| 2104 | // Found a gap, grab this control unit |
| 2105 | break; |
| 2106 | } |
| 2107 | |
| 2108 | // Try the next control unit, loop around |
| 2109 | control_unit = next_session->control_unit + 1; |
| 2110 | } |
| 2111 | |
| 2112 | new_session->control_unit = control_unit; |
| 2113 | new_session->session_order = necp_allocate_new_session_order(priority: new_session->session_priority, control_unit); |
| 2114 | |
| 2115 | if (next_session != NULL) { |
| 2116 | TAILQ_INSERT_BEFORE(next_session, new_session, chain); |
| 2117 | } else { |
| 2118 | TAILQ_INSERT_TAIL(&necp_session_list, new_session, chain); |
| 2119 | } |
| 2120 | |
| 2121 | necp_session_count++; |
| 2122 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 2123 | |
| 2124 | if (necp_debug) { |
| 2125 | NECPLOG(LOG_DEBUG, "Created NECP session, control unit %d", control_unit); |
| 2126 | } |
| 2127 | |
| 2128 | return new_session; |
| 2129 | } |
| 2130 | |
| 2131 | static void |
| 2132 | necp_delete_session(struct necp_session *session) |
| 2133 | { |
| 2134 | if (session != NULL) { |
| 2135 | struct necp_service_registration *service = NULL; |
| 2136 | struct necp_service_registration *temp_service = NULL; |
| 2137 | LIST_FOREACH_SAFE(service, &session->services, session_chain, temp_service) { |
| 2138 | LIST_REMOVE(service, session_chain); |
| 2139 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 2140 | LIST_REMOVE(service, kernel_chain); |
| 2141 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 2142 | kfree_type(struct necp_service_registration, service); |
| 2143 | } |
| 2144 | struct necp_domain_filter *filter = NULL; |
| 2145 | struct necp_domain_filter *temp_filter = NULL; |
| 2146 | LIST_FOREACH_SAFE(filter, &session->domain_filters, owner_chain, temp_filter) { |
| 2147 | if (os_ref_release_locked(rc: &filter->refcount) == 0) { |
| 2148 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 2149 | LIST_REMOVE(filter, chain); |
| 2150 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 2151 | LIST_REMOVE(filter, owner_chain); |
| 2152 | net_bloom_filter_destroy(filter: filter->filter); |
| 2153 | kfree_type(struct necp_domain_filter, filter); |
| 2154 | } |
| 2155 | } |
| 2156 | if (necp_debug) { |
| 2157 | NECPLOG0(LOG_DEBUG, "Deleted NECP session"); |
| 2158 | } |
| 2159 | |
| 2160 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 2161 | TAILQ_REMOVE(&necp_session_list, session, chain); |
| 2162 | necp_session_count--; |
| 2163 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 2164 | |
| 2165 | lck_mtx_destroy(lck: &session->lock, grp: &necp_kernel_policy_mtx_grp); |
| 2166 | kfree_type(struct necp_session, session); |
| 2167 | } |
| 2168 | } |
| 2169 | |
| 2170 | // Session Policy Management |
| 2171 | |
| 2172 | static inline u_int8_t |
| 2173 | necp_policy_result_get_type_from_buffer(u_int8_t *buffer, u_int32_t length) |
| 2174 | { |
| 2175 | return (buffer && length >= sizeof(u_int8_t)) ? buffer[0] : 0; |
| 2176 | } |
| 2177 | |
| 2178 | static inline u_int32_t |
| 2179 | necp_policy_result_get_parameter_length_from_buffer(u_int8_t *buffer, u_int32_t length) |
| 2180 | { |
| 2181 | return (buffer && length > sizeof(u_int8_t)) ? (length - sizeof(u_int8_t)) : 0; |
| 2182 | } |
| 2183 | |
| 2184 | static inline u_int8_t * |
| 2185 | necp_policy_result_get_parameter_pointer_from_buffer(u_int8_t *buffer, u_int32_t length) |
| 2186 | { |
| 2187 | return (buffer && length > sizeof(u_int8_t)) ? (buffer + sizeof(u_int8_t)) : NULL; |
| 2188 | } |
| 2189 | |
| 2190 | static bool |
| 2191 | necp_policy_result_requires_route_rules(u_int8_t *buffer, u_int32_t length) |
| 2192 | { |
| 2193 | u_int8_t type = necp_policy_result_get_type_from_buffer(buffer, length); |
| 2194 | if (type == NECP_POLICY_RESULT_ROUTE_RULES) { |
| 2195 | return TRUE; |
| 2196 | } |
| 2197 | return FALSE; |
| 2198 | } |
| 2199 | |
| 2200 | static inline bool |
| 2201 | _necp_address_is_valid(struct sockaddr *address) |
| 2202 | { |
| 2203 | if (address->sa_family == AF_INET) { |
| 2204 | return address->sa_len == sizeof(struct sockaddr_in); |
| 2205 | } else if (address->sa_family == AF_INET6) { |
| 2206 | return address->sa_len == sizeof(struct sockaddr_in6); |
| 2207 | } else { |
| 2208 | return FALSE; |
| 2209 | } |
| 2210 | } |
| 2211 | |
| 2212 | #define necp_address_is_valid(S) _necp_address_is_valid(SA(S)) |
| 2213 | |
| 2214 | static bool |
| 2215 | necp_policy_result_is_valid(u_int8_t *buffer, u_int32_t length, bool *is_pass_skip) |
| 2216 | { |
| 2217 | bool validated = FALSE; |
| 2218 | u_int8_t type = necp_policy_result_get_type_from_buffer(buffer, length); |
| 2219 | u_int32_t parameter_length = necp_policy_result_get_parameter_length_from_buffer(buffer, length); |
| 2220 | *is_pass_skip = FALSE; |
| 2221 | switch (type) { |
| 2222 | case NECP_POLICY_RESULT_PASS: { |
| 2223 | *is_pass_skip = TRUE; |
| 2224 | if (parameter_length == 0 || parameter_length == sizeof(u_int32_t)) { |
| 2225 | validated = TRUE; |
| 2226 | } |
| 2227 | break; |
| 2228 | } |
| 2229 | case NECP_POLICY_RESULT_DROP: { |
| 2230 | if (parameter_length == 0 || parameter_length == sizeof(u_int32_t)) { |
| 2231 | validated = TRUE; |
| 2232 | } |
| 2233 | break; |
| 2234 | } |
| 2235 | case NECP_POLICY_RESULT_ROUTE_RULES: |
| 2236 | case NECP_POLICY_RESULT_SCOPED_DIRECT: |
| 2237 | case NECP_POLICY_RESULT_ALLOW_UNENTITLED: { |
| 2238 | validated = TRUE; |
| 2239 | break; |
| 2240 | } |
| 2241 | case NECP_POLICY_RESULT_SKIP: |
| 2242 | *is_pass_skip = TRUE; |
| 2243 | case NECP_POLICY_RESULT_SOCKET_DIVERT: |
| 2244 | case NECP_POLICY_RESULT_SOCKET_FILTER: { |
| 2245 | if (parameter_length >= sizeof(u_int32_t)) { |
| 2246 | validated = TRUE; |
| 2247 | } |
| 2248 | break; |
| 2249 | } |
| 2250 | case NECP_POLICY_RESULT_IP_TUNNEL: { |
| 2251 | if (parameter_length > sizeof(u_int32_t)) { |
| 2252 | validated = TRUE; |
| 2253 | } |
| 2254 | break; |
| 2255 | } |
| 2256 | case NECP_POLICY_RESULT_SOCKET_SCOPED: { |
| 2257 | if (parameter_length > 0) { |
| 2258 | validated = TRUE; |
| 2259 | } |
| 2260 | break; |
| 2261 | } |
| 2262 | case NECP_POLICY_RESULT_USE_NETAGENT: |
| 2263 | case NECP_POLICY_RESULT_NETAGENT_SCOPED: |
| 2264 | case NECP_POLICY_RESULT_REMOVE_NETAGENT: { |
| 2265 | if (parameter_length >= sizeof(uuid_t)) { |
| 2266 | validated = TRUE; |
| 2267 | } |
| 2268 | break; |
| 2269 | } |
| 2270 | default: { |
| 2271 | validated = FALSE; |
| 2272 | break; |
| 2273 | } |
| 2274 | } |
| 2275 | |
| 2276 | if (necp_debug) { |
| 2277 | NECPLOG(LOG_DEBUG, "Policy result type %d, valid %d", type, validated); |
| 2278 | } |
| 2279 | |
| 2280 | return validated; |
| 2281 | } |
| 2282 | |
| 2283 | static inline u_int8_t |
| 2284 | necp_policy_condition_get_type_from_buffer(u_int8_t *buffer, u_int32_t length) |
| 2285 | { |
| 2286 | return (buffer && length >= sizeof(u_int8_t)) ? buffer[0] : 0; |
| 2287 | } |
| 2288 | |
| 2289 | static inline u_int8_t |
| 2290 | necp_policy_condition_get_flags_from_buffer(u_int8_t *buffer, u_int32_t length) |
| 2291 | { |
| 2292 | return (buffer && length >= (2 * sizeof(u_int8_t))) ? buffer[1] : 0; |
| 2293 | } |
| 2294 | |
| 2295 | static inline u_int32_t |
| 2296 | necp_policy_condition_get_value_length_from_buffer(u_int8_t *buffer, u_int32_t length) |
| 2297 | { |
| 2298 | return (buffer && length >= (2 * sizeof(u_int8_t))) ? (length - (2 * sizeof(u_int8_t))) : 0; |
| 2299 | } |
| 2300 | |
| 2301 | static inline u_int8_t * |
| 2302 | necp_policy_condition_get_value_pointer_from_buffer(u_int8_t *buffer, u_int32_t length) |
| 2303 | { |
| 2304 | return (buffer && length > (2 * sizeof(u_int8_t))) ? (buffer + (2 * sizeof(u_int8_t))) : NULL; |
| 2305 | } |
| 2306 | |
| 2307 | static inline bool |
| 2308 | necp_policy_condition_is_default(u_int8_t *buffer, u_int32_t length) |
| 2309 | { |
| 2310 | return necp_policy_condition_get_type_from_buffer(buffer, length) == NECP_POLICY_CONDITION_DEFAULT; |
| 2311 | } |
| 2312 | |
| 2313 | static inline bool |
| 2314 | necp_policy_condition_is_application(u_int8_t *buffer, u_int32_t length) |
| 2315 | { |
| 2316 | return necp_policy_condition_get_type_from_buffer(buffer, length) == NECP_POLICY_CONDITION_APPLICATION; |
| 2317 | } |
| 2318 | |
| 2319 | static inline bool |
| 2320 | necp_policy_condition_is_real_application(u_int8_t *buffer, u_int32_t length) |
| 2321 | { |
| 2322 | return necp_policy_condition_get_type_from_buffer(buffer, length) == NECP_POLICY_CONDITION_REAL_APPLICATION; |
| 2323 | } |
| 2324 | |
| 2325 | static inline bool |
| 2326 | necp_policy_condition_requires_application(u_int8_t *buffer, u_int32_t length) |
| 2327 | { |
| 2328 | u_int8_t type = necp_policy_condition_get_type_from_buffer(buffer, length); |
| 2329 | return type == NECP_POLICY_CONDITION_REAL_APPLICATION; |
| 2330 | } |
| 2331 | |
| 2332 | static inline bool |
| 2333 | necp_policy_condition_is_kernel_pid(u_int8_t *buffer, u_int32_t length) |
| 2334 | { |
| 2335 | u_int8_t type = necp_policy_condition_get_type_from_buffer(buffer, length); |
| 2336 | u_int32_t condition_length = 0; |
| 2337 | pid_t *condition_value = NULL; |
| 2338 | |
| 2339 | if (type == NECP_POLICY_CONDITION_PID) { |
| 2340 | condition_length = necp_policy_condition_get_value_length_from_buffer(buffer, length); |
| 2341 | if (condition_length >= sizeof(pid_t)) { |
| 2342 | condition_value = (pid_t *)(void *)necp_policy_condition_get_value_pointer_from_buffer(buffer, length); |
| 2343 | return *condition_value == 0; |
| 2344 | } |
| 2345 | } |
| 2346 | return false; |
| 2347 | } |
| 2348 | |
| 2349 | static bool |
| 2350 | necp_policy_condition_is_valid(u_int8_t *buffer, u_int32_t length, u_int8_t policy_result_type) |
| 2351 | { |
| 2352 | bool validated = FALSE; |
| 2353 | bool result_cannot_have_ip_layer = (policy_result_type == NECP_POLICY_RESULT_SOCKET_DIVERT || |
| 2354 | policy_result_type == NECP_POLICY_RESULT_SOCKET_FILTER || |
| 2355 | policy_result_type == NECP_POLICY_RESULT_SOCKET_SCOPED || |
| 2356 | policy_result_type == NECP_POLICY_RESULT_ROUTE_RULES || |
| 2357 | policy_result_type == NECP_POLICY_RESULT_USE_NETAGENT || |
| 2358 | policy_result_type == NECP_POLICY_RESULT_NETAGENT_SCOPED || |
| 2359 | policy_result_type == NECP_POLICY_RESULT_SCOPED_DIRECT || |
| 2360 | policy_result_type == NECP_POLICY_RESULT_ALLOW_UNENTITLED || |
| 2361 | policy_result_type == NECP_POLICY_RESULT_REMOVE_NETAGENT) ? TRUE : FALSE; |
| 2362 | u_int32_t condition_length = necp_policy_condition_get_value_length_from_buffer(buffer, length); |
| 2363 | u_int8_t *condition_value = necp_policy_condition_get_value_pointer_from_buffer(buffer, length); |
| 2364 | u_int8_t type = necp_policy_condition_get_type_from_buffer(buffer, length); |
| 2365 | u_int8_t flags = necp_policy_condition_get_flags_from_buffer(buffer, length); |
| 2366 | switch (type) { |
| 2367 | case NECP_POLICY_CONDITION_APPLICATION: |
| 2368 | case NECP_POLICY_CONDITION_REAL_APPLICATION: { |
| 2369 | if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE) && |
| 2370 | condition_length >= sizeof(uuid_t) && |
| 2371 | condition_value != NULL && |
| 2372 | !uuid_is_null(uu: condition_value)) { |
| 2373 | validated = TRUE; |
| 2374 | } |
| 2375 | break; |
| 2376 | } |
| 2377 | case NECP_POLICY_CONDITION_DOMAIN: |
| 2378 | case NECP_POLICY_CONDITION_ACCOUNT: |
| 2379 | case NECP_POLICY_CONDITION_BOUND_INTERFACE: |
| 2380 | case NECP_POLICY_CONDITION_SIGNING_IDENTIFIER: |
| 2381 | case NECP_POLICY_CONDITION_URL: { |
| 2382 | if (condition_length > 0) { |
| 2383 | validated = TRUE; |
| 2384 | } |
| 2385 | break; |
| 2386 | } |
| 2387 | case NECP_POLICY_CONDITION_TRAFFIC_CLASS: { |
| 2388 | if (condition_length >= sizeof(struct necp_policy_condition_tc_range)) { |
| 2389 | validated = TRUE; |
| 2390 | } |
| 2391 | break; |
| 2392 | } |
| 2393 | case NECP_POLICY_CONDITION_DEFAULT: |
| 2394 | case NECP_POLICY_CONDITION_ALL_INTERFACES: |
| 2395 | case NECP_POLICY_CONDITION_ENTITLEMENT: |
| 2396 | case NECP_POLICY_CONDITION_PLATFORM_BINARY: |
| 2397 | case NECP_POLICY_CONDITION_HAS_CLIENT: |
| 2398 | case NECP_POLICY_CONDITION_SYSTEM_SIGNED_RESULT: |
| 2399 | case NECP_POLICY_CONDITION_LOCAL_NETWORKS: { |
| 2400 | if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE)) { |
| 2401 | validated = TRUE; |
| 2402 | } |
| 2403 | break; |
| 2404 | } |
| 2405 | case NECP_POLICY_CONDITION_SDK_VERSION: { |
| 2406 | if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE) && |
| 2407 | condition_length >= sizeof(struct necp_policy_condition_sdk_version)) { |
| 2408 | validated = TRUE; |
| 2409 | } |
| 2410 | break; |
| 2411 | } |
| 2412 | case NECP_POLICY_CONDITION_IP_PROTOCOL: { |
| 2413 | if (condition_length >= sizeof(u_int16_t)) { |
| 2414 | validated = TRUE; |
| 2415 | } |
| 2416 | break; |
| 2417 | } |
| 2418 | case NECP_POLICY_CONDITION_PID: { |
| 2419 | if (condition_length >= sizeof(pid_t) && |
| 2420 | condition_value != NULL) { |
| 2421 | validated = TRUE; |
| 2422 | } |
| 2423 | break; |
| 2424 | } |
| 2425 | case NECP_POLICY_CONDITION_DOMAIN_FILTER: { |
| 2426 | if (condition_length >= sizeof(u_int32_t)) { |
| 2427 | validated = TRUE; |
| 2428 | } |
| 2429 | break; |
| 2430 | } |
| 2431 | case NECP_POLICY_CONDITION_UID: |
| 2432 | case NECP_POLICY_CONDITION_REAL_UID: { |
| 2433 | if (condition_length >= sizeof(uid_t)) { |
| 2434 | validated = TRUE; |
| 2435 | } |
| 2436 | break; |
| 2437 | } |
| 2438 | case NECP_POLICY_CONDITION_LOCAL_ADDR: |
| 2439 | case NECP_POLICY_CONDITION_REMOTE_ADDR: { |
| 2440 | if (!result_cannot_have_ip_layer && condition_length >= sizeof(struct necp_policy_condition_addr) && |
| 2441 | necp_address_is_valid(&((struct necp_policy_condition_addr *)(void *)condition_value)->address.sa)) { |
| 2442 | validated = TRUE; |
| 2443 | } |
| 2444 | break; |
| 2445 | } |
| 2446 | case NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE: |
| 2447 | case NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE: { |
| 2448 | if (!result_cannot_have_ip_layer && condition_length >= sizeof(struct necp_policy_condition_addr_range) && |
| 2449 | necp_address_is_valid(&((struct necp_policy_condition_addr_range *)(void *)condition_value)->start_address.sa) && |
| 2450 | necp_address_is_valid(&((struct necp_policy_condition_addr_range *)(void *)condition_value)->end_address.sa)) { |
| 2451 | validated = TRUE; |
| 2452 | } |
| 2453 | break; |
| 2454 | } |
| 2455 | case NECP_POLICY_CONDITION_AGENT_TYPE: { |
| 2456 | if (!(flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE) && |
| 2457 | condition_length >= sizeof(struct necp_policy_condition_agent_type)) { |
| 2458 | validated = TRUE; |
| 2459 | } |
| 2460 | break; |
| 2461 | } |
| 2462 | case NECP_POLICY_CONDITION_FLOW_IP_PROTOCOL: { |
| 2463 | if (condition_length >= sizeof(u_int16_t)) { |
| 2464 | validated = TRUE; |
| 2465 | } |
| 2466 | break; |
| 2467 | } |
| 2468 | case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR: |
| 2469 | case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR: { |
| 2470 | if (condition_length >= sizeof(struct necp_policy_condition_addr) && |
| 2471 | necp_address_is_valid(&((struct necp_policy_condition_addr *)(void *)condition_value)->address.sa)) { |
| 2472 | validated = TRUE; |
| 2473 | } |
| 2474 | break; |
| 2475 | } |
| 2476 | case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_RANGE: |
| 2477 | case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_RANGE: { |
| 2478 | if (condition_length >= sizeof(struct necp_policy_condition_addr_range) && |
| 2479 | necp_address_is_valid(&((struct necp_policy_condition_addr_range *)(void *)condition_value)->start_address.sa) && |
| 2480 | necp_address_is_valid(&((struct necp_policy_condition_addr_range *)(void *)condition_value)->end_address.sa)) { |
| 2481 | validated = TRUE; |
| 2482 | } |
| 2483 | break; |
| 2484 | } |
| 2485 | case NECP_POLICY_CONDITION_CLIENT_FLAGS: { |
| 2486 | if (condition_length == 0 || condition_length >= sizeof(u_int32_t)) { |
| 2487 | validated = TRUE; |
| 2488 | } |
| 2489 | break; |
| 2490 | } |
| 2491 | case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_EMPTY: { |
| 2492 | validated = TRUE; |
| 2493 | break; |
| 2494 | } |
| 2495 | case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_EMPTY: { |
| 2496 | validated = TRUE; |
| 2497 | break; |
| 2498 | } |
| 2499 | case NECP_POLICY_CONDITION_PACKET_FILTER_TAGS: { |
| 2500 | if (condition_length >= sizeof(u_int16_t)) { |
| 2501 | u_int16_t packet_filter_tags = *(u_int16_t *)(void *)condition_value; |
| 2502 | if (packet_filter_tags > 0 && packet_filter_tags <= NECP_POLICY_CONDITION_PACKET_FILTER_TAG_MAX) { |
| 2503 | validated = TRUE; |
| 2504 | } |
| 2505 | } |
| 2506 | break; |
| 2507 | } |
| 2508 | case NECP_POLICY_CONDITION_FLOW_IS_LOOPBACK: { |
| 2509 | validated = TRUE; |
| 2510 | break; |
| 2511 | } |
| 2512 | case NECP_POLICY_CONDITION_DELEGATE_IS_PLATFORM_BINARY: { |
| 2513 | validated = TRUE; |
| 2514 | break; |
| 2515 | } |
| 2516 | case NECP_POLICY_CONDITION_SCHEME_PORT: { |
| 2517 | if (condition_length >= sizeof(u_int16_t)) { |
| 2518 | validated = TRUE; |
| 2519 | } |
| 2520 | break; |
| 2521 | } |
| 2522 | case NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS: { |
| 2523 | if (condition_length >= sizeof(u_int32_t) * NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_MAX) { |
| 2524 | validated = TRUE; |
| 2525 | } |
| 2526 | break; |
| 2527 | } |
| 2528 | default: { |
| 2529 | validated = FALSE; |
| 2530 | break; |
| 2531 | } |
| 2532 | } |
| 2533 | |
| 2534 | if (necp_debug) { |
| 2535 | NECPLOG(LOG_DEBUG, "Policy condition type %d, valid %d", type, validated); |
| 2536 | } |
| 2537 | |
| 2538 | return validated; |
| 2539 | } |
| 2540 | |
| 2541 | static bool |
| 2542 | necp_policy_route_rule_is_default(u_int8_t *buffer, u_int32_t length) |
| 2543 | { |
| 2544 | return necp_policy_condition_get_value_length_from_buffer(buffer, length) == 0 && |
| 2545 | necp_policy_condition_get_flags_from_buffer(buffer, length) == 0; |
| 2546 | } |
| 2547 | |
| 2548 | static bool |
| 2549 | necp_policy_route_rule_is_valid(u_int8_t *buffer, u_int32_t length) |
| 2550 | { |
| 2551 | bool validated = FALSE; |
| 2552 | u_int8_t type = necp_policy_condition_get_type_from_buffer(buffer, length); |
| 2553 | switch (type) { |
| 2554 | case NECP_ROUTE_RULE_ALLOW_INTERFACE: { |
| 2555 | validated = TRUE; |
| 2556 | break; |
| 2557 | } |
| 2558 | case NECP_ROUTE_RULE_DENY_INTERFACE: { |
| 2559 | validated = TRUE; |
| 2560 | break; |
| 2561 | } |
| 2562 | case NECP_ROUTE_RULE_DENY_INTERFACE_WITH_TYPE: { |
| 2563 | u_int32_t rule_length = necp_policy_condition_get_value_length_from_buffer(buffer, length); |
| 2564 | validated = (rule_length >= sizeof(u_int32_t)); |
| 2565 | break; |
| 2566 | } |
| 2567 | case NECP_ROUTE_RULE_QOS_MARKING: { |
| 2568 | validated = TRUE; |
| 2569 | break; |
| 2570 | } |
| 2571 | case NECP_ROUTE_RULE_DENY_LQM_ABORT: { |
| 2572 | validated = TRUE; |
| 2573 | break; |
| 2574 | } |
| 2575 | case NECP_ROUTE_RULE_USE_NETAGENT: |
| 2576 | case NECP_ROUTE_RULE_REMOVE_NETAGENT: { |
| 2577 | u_int32_t rule_length = necp_policy_condition_get_value_length_from_buffer(buffer, length); |
| 2578 | validated = (rule_length >= sizeof(uuid_t)); |
| 2579 | break; |
| 2580 | } |
| 2581 | case NECP_ROUTE_RULE_DIVERT_SOCKET: { |
| 2582 | u_int32_t rule_length = necp_policy_condition_get_value_length_from_buffer(buffer, length); |
| 2583 | validated = (rule_length >= sizeof(uint32_t)); |
| 2584 | break; |
| 2585 | } |
| 2586 | default: { |
| 2587 | validated = FALSE; |
| 2588 | break; |
| 2589 | } |
| 2590 | } |
| 2591 | |
| 2592 | if (necp_debug) { |
| 2593 | NECPLOG(LOG_DEBUG, "Policy route rule type %d, valid %d", type, validated); |
| 2594 | } |
| 2595 | |
| 2596 | return validated; |
| 2597 | } |
| 2598 | |
| 2599 | static int |
| 2600 | necp_get_posix_error_for_necp_error(int response_error) |
| 2601 | { |
| 2602 | switch (response_error) { |
| 2603 | case NECP_ERROR_UNKNOWN_PACKET_TYPE: |
| 2604 | case NECP_ERROR_INVALID_TLV: |
| 2605 | case NECP_ERROR_POLICY_RESULT_INVALID: |
| 2606 | case NECP_ERROR_POLICY_CONDITIONS_INVALID: |
| 2607 | case NECP_ERROR_ROUTE_RULES_INVALID: { |
| 2608 | return EINVAL; |
| 2609 | } |
| 2610 | case NECP_ERROR_POLICY_ID_NOT_FOUND: { |
| 2611 | return ENOENT; |
| 2612 | } |
| 2613 | case NECP_ERROR_INVALID_PROCESS: { |
| 2614 | return EPERM; |
| 2615 | } |
| 2616 | case NECP_ERROR_INTERNAL: |
| 2617 | default: { |
| 2618 | return ENOMEM; |
| 2619 | } |
| 2620 | } |
| 2621 | } |
| 2622 | |
| 2623 | static necp_policy_id |
| 2624 | necp_handle_policy_add(struct necp_session *session, |
| 2625 | u_int8_t *tlv_buffer, size_t tlv_buffer_length, int offset, int *return_error) |
| 2626 | { |
| 2627 | bool has_default_condition = FALSE; |
| 2628 | bool has_non_default_condition = FALSE; |
| 2629 | bool has_application_condition = FALSE; |
| 2630 | bool has_real_application_condition = FALSE; |
| 2631 | bool requires_application_condition = FALSE; |
| 2632 | bool has_kernel_pid = FALSE; |
| 2633 | bool is_pass_skip = FALSE; |
| 2634 | u_int8_t *conditions_array = NULL; |
| 2635 | u_int32_t conditions_array_size = 0; |
| 2636 | int conditions_array_cursor; |
| 2637 | |
| 2638 | bool has_default_route_rule = FALSE; |
| 2639 | u_int8_t *route_rules_array = NULL; |
| 2640 | u_int32_t route_rules_array_size = 0; |
| 2641 | int route_rules_array_cursor; |
| 2642 | |
| 2643 | int cursor; |
| 2644 | int error = 0; |
| 2645 | u_int32_t response_error = NECP_ERROR_INTERNAL; |
| 2646 | |
| 2647 | necp_policy_order order = 0; |
| 2648 | struct necp_session_policy *policy = NULL; |
| 2649 | u_int8_t *policy_result = NULL; |
| 2650 | u_int32_t policy_result_size = 0; |
| 2651 | |
| 2652 | // Read policy order |
| 2653 | error = necp_get_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset, NECP_TLV_POLICY_ORDER, buff_len: sizeof(order), buff: &order, NULL); |
| 2654 | if (error) { |
| 2655 | NECPLOG(LOG_ERR, "Failed to get policy order: %d", error); |
| 2656 | response_error = NECP_ERROR_INVALID_TLV; |
| 2657 | goto fail; |
| 2658 | } |
| 2659 | |
| 2660 | // Read policy result |
| 2661 | cursor = necp_find_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset, NECP_TLV_POLICY_RESULT, err: &error, next: 0); |
| 2662 | if (error || cursor < 0) { |
| 2663 | NECPLOG(LOG_ERR, "Failed to find policy result TLV: %d", error); |
| 2664 | response_error = NECP_ERROR_INVALID_TLV; |
| 2665 | goto fail; |
| 2666 | } |
| 2667 | error = necp_get_tlv_at_offset(buffer: tlv_buffer, buffer_length: tlv_buffer_length, tlv_offset: cursor, out_buffer_length: 0, NULL, value_size: &policy_result_size); |
| 2668 | if (error || policy_result_size == 0) { |
| 2669 | NECPLOG(LOG_ERR, "Failed to get policy result length: %d", error); |
| 2670 | response_error = NECP_ERROR_INVALID_TLV; |
| 2671 | goto fail; |
| 2672 | } |
| 2673 | if (policy_result_size > NECP_MAX_POLICY_RESULT_SIZE) { |
| 2674 | NECPLOG(LOG_ERR, "Policy result length too large: %u", policy_result_size); |
| 2675 | response_error = NECP_ERROR_INVALID_TLV; |
| 2676 | goto fail; |
| 2677 | } |
| 2678 | policy_result = (u_int8_t *)kalloc_data(policy_result_size, Z_WAITOK); |
| 2679 | if (policy_result == NULL) { |
| 2680 | NECPLOG(LOG_ERR, "Failed to allocate a policy result buffer (size %d)", policy_result_size); |
| 2681 | response_error = NECP_ERROR_INTERNAL; |
| 2682 | goto fail; |
| 2683 | } |
| 2684 | error = necp_get_tlv_at_offset(buffer: tlv_buffer, buffer_length: tlv_buffer_length, tlv_offset: cursor, out_buffer_length: policy_result_size, out_buffer: policy_result, NULL); |
| 2685 | if (error) { |
| 2686 | NECPLOG(LOG_ERR, "Failed to get policy result: %d", error); |
| 2687 | response_error = NECP_ERROR_POLICY_RESULT_INVALID; |
| 2688 | goto fail; |
| 2689 | } |
| 2690 | if (!necp_policy_result_is_valid(buffer: policy_result, length: policy_result_size, is_pass_skip: &is_pass_skip)) { |
| 2691 | NECPLOG0(LOG_ERR, "Failed to validate policy result"); |
| 2692 | response_error = NECP_ERROR_POLICY_RESULT_INVALID; |
| 2693 | goto fail; |
| 2694 | } |
| 2695 | |
| 2696 | if (necp_policy_result_requires_route_rules(buffer: policy_result, length: policy_result_size)) { |
| 2697 | // Read route rules conditions |
| 2698 | for (cursor = necp_find_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset, NECP_TLV_ROUTE_RULE, err: &error, next: 0); |
| 2699 | cursor >= 0; |
| 2700 | cursor = necp_find_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset: cursor, NECP_TLV_ROUTE_RULE, err: &error, next: 1)) { |
| 2701 | u_int32_t route_rule_size = 0; |
| 2702 | necp_get_tlv_at_offset(buffer: tlv_buffer, buffer_length: tlv_buffer_length, tlv_offset: cursor, out_buffer_length: 0, NULL, value_size: &route_rule_size); |
| 2703 | if (os_add_overflow(route_rules_array_size, |
| 2704 | (sizeof(u_int8_t) + sizeof(u_int32_t) + route_rule_size), |
| 2705 | &route_rules_array_size)) { |
| 2706 | NECPLOG0(LOG_ERR, "Route rules size overflowed, too large"); |
| 2707 | response_error = NECP_ERROR_INVALID_TLV; |
| 2708 | goto fail; |
| 2709 | } |
| 2710 | } |
| 2711 | |
| 2712 | if (route_rules_array_size == 0) { |
| 2713 | NECPLOG0(LOG_ERR, "Failed to get policy route rules"); |
| 2714 | response_error = NECP_ERROR_INVALID_TLV; |
| 2715 | goto fail; |
| 2716 | } |
| 2717 | if (route_rules_array_size > NECP_MAX_ROUTE_RULES_ARRAY_SIZE) { |
| 2718 | NECPLOG(LOG_ERR, "Route rules length too large: %u", route_rules_array_size); |
| 2719 | response_error = NECP_ERROR_INVALID_TLV; |
| 2720 | goto fail; |
| 2721 | } |
| 2722 | route_rules_array = (u_int8_t *)kalloc_data(route_rules_array_size, Z_WAITOK); |
| 2723 | if (route_rules_array == NULL) { |
| 2724 | NECPLOG(LOG_ERR, "Failed to allocate a policy route rules array (size %d)", route_rules_array_size); |
| 2725 | response_error = NECP_ERROR_INTERNAL; |
| 2726 | goto fail; |
| 2727 | } |
| 2728 | |
| 2729 | route_rules_array_cursor = 0; |
| 2730 | for (cursor = necp_find_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset, NECP_TLV_ROUTE_RULE, err: &error, next: 0); |
| 2731 | cursor >= 0; |
| 2732 | cursor = necp_find_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset: cursor, NECP_TLV_ROUTE_RULE, err: &error, next: 1)) { |
| 2733 | u_int8_t route_rule_type = NECP_TLV_ROUTE_RULE; |
| 2734 | u_int32_t route_rule_size = 0; |
| 2735 | necp_get_tlv_at_offset(buffer: tlv_buffer, buffer_length: tlv_buffer_length, tlv_offset: cursor, out_buffer_length: 0, NULL, value_size: &route_rule_size); |
| 2736 | if (route_rule_size > 0 && |
| 2737 | (sizeof(route_rule_type) + sizeof(route_rule_size) + route_rule_size) <= (route_rules_array_size - route_rules_array_cursor)) { |
| 2738 | // Add type |
| 2739 | memcpy(dst: (route_rules_array + route_rules_array_cursor), src: &route_rule_type, n: sizeof(route_rule_type)); |
| 2740 | route_rules_array_cursor += sizeof(route_rule_type); |
| 2741 | |
| 2742 | // Add length |
| 2743 | memcpy(dst: (route_rules_array + route_rules_array_cursor), src: &route_rule_size, n: sizeof(route_rule_size)); |
| 2744 | route_rules_array_cursor += sizeof(route_rule_size); |
| 2745 | |
| 2746 | // Add value |
| 2747 | necp_get_tlv_at_offset(buffer: tlv_buffer, buffer_length: tlv_buffer_length, tlv_offset: cursor, out_buffer_length: route_rule_size, out_buffer: (route_rules_array + route_rules_array_cursor), NULL); |
| 2748 | |
| 2749 | if (!necp_policy_route_rule_is_valid(buffer: (route_rules_array + route_rules_array_cursor), length: route_rule_size)) { |
| 2750 | NECPLOG0(LOG_ERR, "Failed to validate policy route rule"); |
| 2751 | response_error = NECP_ERROR_ROUTE_RULES_INVALID; |
| 2752 | goto fail; |
| 2753 | } |
| 2754 | |
| 2755 | if (necp_policy_route_rule_is_default(buffer: (route_rules_array + route_rules_array_cursor), length: route_rule_size)) { |
| 2756 | if (has_default_route_rule) { |
| 2757 | NECPLOG0(LOG_ERR, "Failed to validate route rule; contained multiple default route rules"); |
| 2758 | response_error = NECP_ERROR_ROUTE_RULES_INVALID; |
| 2759 | goto fail; |
| 2760 | } |
| 2761 | has_default_route_rule = TRUE; |
| 2762 | } |
| 2763 | |
| 2764 | route_rules_array_cursor += route_rule_size; |
| 2765 | } |
| 2766 | } |
| 2767 | } |
| 2768 | |
| 2769 | // Read policy conditions |
| 2770 | for (cursor = necp_find_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset, NECP_TLV_POLICY_CONDITION, err: &error, next: 0); |
| 2771 | cursor >= 0; |
| 2772 | cursor = necp_find_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset: cursor, NECP_TLV_POLICY_CONDITION, err: &error, next: 1)) { |
| 2773 | u_int32_t condition_size = 0; |
| 2774 | necp_get_tlv_at_offset(buffer: tlv_buffer, buffer_length: tlv_buffer_length, tlv_offset: cursor, out_buffer_length: 0, NULL, value_size: &condition_size); |
| 2775 | |
| 2776 | if (condition_size > 0) { |
| 2777 | if (os_add_overflow(conditions_array_size, |
| 2778 | (sizeof(u_int8_t) + sizeof(u_int32_t) + condition_size), |
| 2779 | &conditions_array_size)) { |
| 2780 | NECPLOG0(LOG_ERR, "Conditions size overflowed, too large"); |
| 2781 | response_error = NECP_ERROR_INVALID_TLV; |
| 2782 | goto fail; |
| 2783 | } |
| 2784 | } |
| 2785 | } |
| 2786 | |
| 2787 | if (conditions_array_size == 0) { |
| 2788 | NECPLOG0(LOG_ERR, "Failed to get policy conditions"); |
| 2789 | response_error = NECP_ERROR_INVALID_TLV; |
| 2790 | goto fail; |
| 2791 | } |
| 2792 | if (conditions_array_size > NECP_MAX_CONDITIONS_ARRAY_SIZE) { |
| 2793 | NECPLOG(LOG_ERR, "Conditions length too large: %u", conditions_array_size); |
| 2794 | response_error = NECP_ERROR_INVALID_TLV; |
| 2795 | goto fail; |
| 2796 | } |
| 2797 | conditions_array = (u_int8_t *)kalloc_data(conditions_array_size, Z_WAITOK); |
| 2798 | if (conditions_array == NULL) { |
| 2799 | NECPLOG(LOG_ERR, "Failed to allocate a policy conditions array (size %d)", conditions_array_size); |
| 2800 | response_error = NECP_ERROR_INTERNAL; |
| 2801 | goto fail; |
| 2802 | } |
| 2803 | |
| 2804 | conditions_array_cursor = 0; |
| 2805 | for (cursor = necp_find_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset, NECP_TLV_POLICY_CONDITION, err: &error, next: 0); |
| 2806 | cursor >= 0; |
| 2807 | cursor = necp_find_tlv(buffer: tlv_buffer, buffer_length: tlv_buffer_length, offset: cursor, NECP_TLV_POLICY_CONDITION, err: &error, next: 1)) { |
| 2808 | u_int8_t condition_type = NECP_TLV_POLICY_CONDITION; |
| 2809 | u_int32_t condition_size = 0; |
| 2810 | necp_get_tlv_at_offset(buffer: tlv_buffer, buffer_length: tlv_buffer_length, tlv_offset: cursor, out_buffer_length: 0, NULL, value_size: &condition_size); |
| 2811 | if (condition_size > 0 && |
| 2812 | (sizeof(condition_type) + sizeof(condition_size) + condition_size) <= (conditions_array_size - conditions_array_cursor)) { |
| 2813 | // Add type |
| 2814 | memcpy(dst: (conditions_array + conditions_array_cursor), src: &condition_type, n: sizeof(condition_type)); |
| 2815 | conditions_array_cursor += sizeof(condition_type); |
| 2816 | |
| 2817 | // Add length |
| 2818 | memcpy(dst: (conditions_array + conditions_array_cursor), src: &condition_size, n: sizeof(condition_size)); |
| 2819 | conditions_array_cursor += sizeof(condition_size); |
| 2820 | |
| 2821 | // Add value |
| 2822 | necp_get_tlv_at_offset(buffer: tlv_buffer, buffer_length: tlv_buffer_length, tlv_offset: cursor, out_buffer_length: condition_size, out_buffer: (conditions_array + conditions_array_cursor), NULL); |
| 2823 | if (!necp_policy_condition_is_valid(buffer: (conditions_array + conditions_array_cursor), length: condition_size, policy_result_type: necp_policy_result_get_type_from_buffer(buffer: policy_result, length: policy_result_size))) { |
| 2824 | NECPLOG0(LOG_ERR, "Failed to validate policy condition"); |
| 2825 | response_error = NECP_ERROR_POLICY_CONDITIONS_INVALID; |
| 2826 | goto fail; |
| 2827 | } |
| 2828 | |
| 2829 | if (necp_policy_condition_is_default(buffer: (conditions_array + conditions_array_cursor), length: condition_size)) { |
| 2830 | has_default_condition = TRUE; |
| 2831 | } else { |
| 2832 | has_non_default_condition = TRUE; |
| 2833 | } |
| 2834 | if (has_default_condition && has_non_default_condition) { |
| 2835 | NECPLOG0(LOG_ERR, "Failed to validate conditions; contained default and non-default conditions"); |
| 2836 | response_error = NECP_ERROR_POLICY_CONDITIONS_INVALID; |
| 2837 | goto fail; |
| 2838 | } |
| 2839 | |
| 2840 | if (necp_policy_condition_is_application(buffer: (conditions_array + conditions_array_cursor), length: condition_size)) { |
| 2841 | has_application_condition = TRUE; |
| 2842 | } |
| 2843 | |
| 2844 | if (necp_policy_condition_is_real_application(buffer: (conditions_array + conditions_array_cursor), length: condition_size)) { |
| 2845 | has_real_application_condition = TRUE; |
| 2846 | } |
| 2847 | |
| 2848 | if (necp_policy_condition_requires_application(buffer: (conditions_array + conditions_array_cursor), length: condition_size)) { |
| 2849 | requires_application_condition = TRUE; |
| 2850 | } |
| 2851 | |
| 2852 | if (necp_policy_condition_is_kernel_pid(buffer: (conditions_array + conditions_array_cursor), length: condition_size)) { |
| 2853 | has_kernel_pid = TRUE; |
| 2854 | } |
| 2855 | |
| 2856 | conditions_array_cursor += condition_size; |
| 2857 | } |
| 2858 | } |
| 2859 | |
| 2860 | if (requires_application_condition && !has_application_condition) { |
| 2861 | NECPLOG0(LOG_ERR, "Failed to validate conditions; did not contain application condition"); |
| 2862 | response_error = NECP_ERROR_POLICY_CONDITIONS_INVALID; |
| 2863 | goto fail; |
| 2864 | } |
| 2865 | |
| 2866 | if (has_kernel_pid && !is_pass_skip) { |
| 2867 | NECPLOG0(LOG_ERR, "Failed to validate conditions; kernel pid (0) condition allows only Pass/Skip result"); |
| 2868 | response_error = NECP_ERROR_POLICY_CONDITIONS_INVALID; |
| 2869 | goto fail; |
| 2870 | } |
| 2871 | |
| 2872 | if ((policy = necp_policy_create(session, order, conditions_array, conditions_array_size, route_rules_array, route_rules_array_size, result: policy_result, result_size: policy_result_size)) == NULL) { |
| 2873 | response_error = NECP_ERROR_INTERNAL; |
| 2874 | goto fail; |
| 2875 | } |
| 2876 | |
| 2877 | return policy->local_id; |
| 2878 | |
| 2879 | fail: |
| 2880 | if (policy_result != NULL) { |
| 2881 | kfree_data(policy_result, policy_result_size); |
| 2882 | } |
| 2883 | if (conditions_array != NULL) { |
| 2884 | kfree_data(conditions_array, conditions_array_size); |
| 2885 | } |
| 2886 | if (route_rules_array != NULL) { |
| 2887 | kfree_data(route_rules_array, route_rules_array_size); |
| 2888 | } |
| 2889 | |
| 2890 | if (return_error != NULL) { |
| 2891 | *return_error = necp_get_posix_error_for_necp_error(response_error); |
| 2892 | } |
| 2893 | return 0; |
| 2894 | } |
| 2895 | |
| 2896 | static necp_policy_id |
| 2897 | necp_policy_get_new_id(struct necp_session *session) |
| 2898 | { |
| 2899 | session->last_policy_id++; |
| 2900 | if (session->last_policy_id < 1) { |
| 2901 | session->last_policy_id = 1; |
| 2902 | } |
| 2903 | |
| 2904 | necp_policy_id newid = session->last_policy_id; |
| 2905 | |
| 2906 | if (newid == 0) { |
| 2907 | NECPLOG0(LOG_ERR, "Allocate policy id failed.\n"); |
| 2908 | return 0; |
| 2909 | } |
| 2910 | |
| 2911 | return newid; |
| 2912 | } |
| 2913 | |
| 2914 | /* |
| 2915 | * For the policy dump response this is the structure: |
| 2916 | * |
| 2917 | * <NECP_PACKET_HEADER> |
| 2918 | * { |
| 2919 | * type : NECP_TLV_POLICY_DUMP |
| 2920 | * length : ... |
| 2921 | * value : |
| 2922 | * { |
| 2923 | * { |
| 2924 | * type : NECP_TLV_POLICY_ID |
| 2925 | * len : ... |
| 2926 | * value : ... |
| 2927 | * } |
| 2928 | * { |
| 2929 | * type : NECP_TLV_POLICY_ORDER |
| 2930 | * len : ... |
| 2931 | * value : ... |
| 2932 | * } |
| 2933 | * { |
| 2934 | * type : NECP_TLV_POLICY_RESULT_STRING |
| 2935 | * len : ... |
| 2936 | * value : ... |
| 2937 | * } |
| 2938 | * { |
| 2939 | * type : NECP_TLV_POLICY_OWNER |
| 2940 | * len : ... |
| 2941 | * value : ... |
| 2942 | * } |
| 2943 | * { |
| 2944 | * type : NECP_TLV_POLICY_CONDITION |
| 2945 | * len : ... |
| 2946 | * value : |
| 2947 | * { |
| 2948 | * { |
| 2949 | * type : NECP_POLICY_CONDITION_ALL_INTERFACES |
| 2950 | * len : ... |
| 2951 | * value : ... |
| 2952 | * } |
| 2953 | * { |
| 2954 | * type : NECP_POLICY_CONDITION_BOUND_INTERFACES |
| 2955 | * len : ... |
| 2956 | * value : ... |
| 2957 | * } |
| 2958 | * ... |
| 2959 | * } |
| 2960 | * } |
| 2961 | * } |
| 2962 | * } |
| 2963 | * { |
| 2964 | * type : NECP_TLV_POLICY_DUMP |
| 2965 | * length : ... |
| 2966 | * value : |
| 2967 | * { |
| 2968 | * { |
| 2969 | * type : NECP_TLV_POLICY_ID |
| 2970 | * len : ... |
| 2971 | * value : ... |
| 2972 | * } |
| 2973 | * { |
| 2974 | * type : NECP_TLV_POLICY_ORDER |
| 2975 | * len : ... |
| 2976 | * value : ... |
| 2977 | * } |
| 2978 | * { |
| 2979 | * type : NECP_TLV_POLICY_RESULT_STRING |
| 2980 | * len : ... |
| 2981 | * value : ... |
| 2982 | * } |
| 2983 | * { |
| 2984 | * type : NECP_TLV_POLICY_OWNER |
| 2985 | * len : ... |
| 2986 | * value : ... |
| 2987 | * } |
| 2988 | * { |
| 2989 | * type : NECP_TLV_POLICY_CONDITION |
| 2990 | * len : ... |
| 2991 | * value : |
| 2992 | * { |
| 2993 | * { |
| 2994 | * type : NECP_POLICY_CONDITION_ALL_INTERFACES |
| 2995 | * len : ... |
| 2996 | * value : ... |
| 2997 | * } |
| 2998 | * { |
| 2999 | * type : NECP_POLICY_CONDITION_BOUND_INTERFACES |
| 3000 | * len : ... |
| 3001 | * value : ... |
| 3002 | * } |
| 3003 | * ... |
| 3004 | * } |
| 3005 | * } |
| 3006 | * } |
| 3007 | * } |
| 3008 | * ... |
| 3009 | */ |
| 3010 | static int |
| 3011 | necp_handle_policy_dump_all(user_addr_t out_buffer, size_t out_buffer_length) |
| 3012 | { |
| 3013 | struct necp_kernel_socket_policy *policy = NULL; |
| 3014 | int policy_i; |
| 3015 | int policy_count = 0; |
| 3016 | u_int8_t **tlv_buffer_pointers = NULL; |
| 3017 | u_int32_t *tlv_buffer_lengths = NULL; |
| 3018 | u_int32_t total_tlv_len = 0; |
| 3019 | u_int8_t *result_buf = NULL; |
| 3020 | u_int8_t *result_buf_cursor = result_buf; |
| 3021 | char result_string[MAX_RESULT_STRING_LEN]; |
| 3022 | char proc_name_string[MAXCOMLEN + 1]; |
| 3023 | |
| 3024 | int error_code = 0; |
| 3025 | bool error_occured = false; |
| 3026 | u_int32_t response_error = NECP_ERROR_INTERNAL; |
| 3027 | |
| 3028 | #define REPORT_ERROR(error) error_occured = true; \ |
| 3029 | response_error = error; \ |
| 3030 | goto done |
| 3031 | |
| 3032 | #define UNLOCK_AND_REPORT_ERROR(lock, error) lck_rw_done(lock); \ |
| 3033 | REPORT_ERROR(error) |
| 3034 | |
| 3035 | errno_t cred_result = priv_check_cred(cred: kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, flags: 0); |
| 3036 | if (cred_result != 0) { |
| 3037 | NECPLOG0(LOG_ERR, "Session does not hold the necessary entitlement to get Network Extension Policy information"); |
| 3038 | REPORT_ERROR(NECP_ERROR_INTERNAL); |
| 3039 | } |
| 3040 | |
| 3041 | // LOCK |
| 3042 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 3043 | |
| 3044 | if (necp_debug) { |
| 3045 | NECPLOG0(LOG_DEBUG, "Gathering policies"); |
| 3046 | } |
| 3047 | |
| 3048 | policy_count = necp_kernel_application_policies_count; |
| 3049 | |
| 3050 | tlv_buffer_pointers = kalloc_type(u_int8_t *, policy_count, M_WAITOK | Z_ZERO); |
| 3051 | if (tlv_buffer_pointers == NULL) { |
| 3052 | NECPLOG(LOG_DEBUG, "Failed to allocate tlv_buffer_pointers (%lu bytes)", sizeof(u_int8_t *) * policy_count); |
| 3053 | UNLOCK_AND_REPORT_ERROR(&necp_kernel_policy_lock, NECP_ERROR_INTERNAL); |
| 3054 | } |
| 3055 | |
| 3056 | tlv_buffer_lengths = (u_int32_t *)kalloc_data(sizeof(u_int32_t) * policy_count, Z_NOWAIT | Z_ZERO); |
| 3057 | if (tlv_buffer_lengths == NULL) { |
| 3058 | NECPLOG(LOG_DEBUG, "Failed to allocate tlv_buffer_lengths (%lu bytes)", sizeof(u_int32_t) * policy_count); |
| 3059 | UNLOCK_AND_REPORT_ERROR(&necp_kernel_policy_lock, NECP_ERROR_INTERNAL); |
| 3060 | } |
| 3061 | |
| 3062 | for (policy_i = 0; necp_kernel_socket_policies_app_layer_map != NULL && necp_kernel_socket_policies_app_layer_map[policy_i] != NULL; policy_i++) { |
| 3063 | policy = necp_kernel_socket_policies_app_layer_map[policy_i]; |
| 3064 | |
| 3065 | memset(s: result_string, c: 0, MAX_RESULT_STRING_LEN); |
| 3066 | memset(s: proc_name_string, c: 0, MAXCOMLEN + 1); |
| 3067 | |
| 3068 | necp_get_result_description(result_string, result: policy->result, result_parameter: policy->result_parameter); |
| 3069 | proc_name(pid: policy->session_pid, buf: proc_name_string, MAXCOMLEN); |
| 3070 | |
| 3071 | u_int16_t proc_name_len = strlen(s: proc_name_string) + 1; |
| 3072 | u_int16_t result_string_len = strlen(s: result_string) + 1; |
| 3073 | |
| 3074 | if (necp_debug) { |
| 3075 | NECPLOG(LOG_DEBUG, "Policy: process: %s, result: %s", proc_name_string, result_string); |
| 3076 | } |
| 3077 | |
| 3078 | u_int32_t total_allocated_bytes = sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(policy->id) + // NECP_TLV_POLICY_ID |
| 3079 | sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(policy->order) + // NECP_TLV_POLICY_ORDER |
| 3080 | sizeof(u_int8_t) + sizeof(u_int32_t) + sizeof(policy->session_order) + // NECP_TLV_POLICY_SESSION_ORDER |
| 3081 | sizeof(u_int8_t) + sizeof(u_int32_t) + result_string_len + // NECP_TLV_POLICY_RESULT_STRING |
| 3082 | sizeof(u_int8_t) + sizeof(u_int32_t) + proc_name_len + // NECP_TLV_POLICY_OWNER |
| 3083 | sizeof(u_int8_t) + sizeof(u_int32_t); // NECP_TLV_POLICY_CONDITION |
| 3084 | |
| 3085 | // We now traverse the condition_mask to see how much space we need to allocate |
| 3086 | u_int64_t condition_mask = policy->condition_mask; |
| 3087 | u_int8_t num_conditions = 0; |
| 3088 | struct necp_string_id_mapping *account_id_entry = NULL; |
| 3089 | char if_name[IFXNAMSIZ]; |
| 3090 | u_int32_t condition_tlv_length = 0; |
| 3091 | memset(s: if_name, c: 0, n: sizeof(if_name)); |
| 3092 | |
| 3093 | if (condition_mask == NECP_POLICY_CONDITION_DEFAULT) { |
| 3094 | num_conditions++; |
| 3095 | } else { |
| 3096 | if (condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) { |
| 3097 | num_conditions++; |
| 3098 | } |
| 3099 | if (condition_mask & NECP_KERNEL_CONDITION_HAS_CLIENT) { |
| 3100 | num_conditions++; |
| 3101 | } |
| 3102 | if (condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) { |
| 3103 | snprintf(if_name, IFXNAMSIZ, "%s%d", ifnet_name(interface: policy->cond_bound_interface), ifnet_unit(interface: policy->cond_bound_interface)); |
| 3104 | condition_tlv_length += strlen(s: if_name) + 1; |
| 3105 | num_conditions++; |
| 3106 | } |
| 3107 | if (condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) { |
| 3108 | condition_tlv_length += sizeof(policy->cond_protocol); |
| 3109 | num_conditions++; |
| 3110 | } |
| 3111 | if (condition_mask & NECP_KERNEL_CONDITION_APP_ID) { |
| 3112 | condition_tlv_length += sizeof(uuid_t); |
| 3113 | num_conditions++; |
| 3114 | } |
| 3115 | if (condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) { |
| 3116 | condition_tlv_length += sizeof(uuid_t); |
| 3117 | num_conditions++; |
| 3118 | } |
| 3119 | if ((condition_mask & NECP_KERNEL_CONDITION_DOMAIN) || |
| 3120 | (condition_mask & NECP_KERNEL_CONDITION_EXACT_DOMAIN)) { |
| 3121 | u_int32_t domain_len = strlen(s: policy->cond_domain) + 1; |
| 3122 | condition_tlv_length += domain_len; |
| 3123 | num_conditions++; |
| 3124 | } |
| 3125 | if (condition_mask & NECP_KERNEL_CONDITION_DOMAIN_FILTER) { |
| 3126 | condition_tlv_length += sizeof(u_int32_t); |
| 3127 | num_conditions++; |
| 3128 | } |
| 3129 | if (condition_mask & NECP_KERNEL_CONDITION_URL) { |
| 3130 | u_int32_t url_len = strlen(s: policy->cond_url) + 1; |
| 3131 | condition_tlv_length += url_len; |
| 3132 | num_conditions++; |
| 3133 | } |
| 3134 | if (condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID) { |
| 3135 | account_id_entry = necp_lookup_string_with_id_locked(list: &necp_account_id_list, local_id: policy->cond_account_id); |
| 3136 | u_int32_t account_id_len = 0; |
| 3137 | if (account_id_entry) { |
| 3138 | account_id_len = account_id_entry->string ? strlen(s: account_id_entry->string) + 1 : 0; |
| 3139 | } |
| 3140 | condition_tlv_length += account_id_len; |
| 3141 | num_conditions++; |
| 3142 | } |
| 3143 | if (condition_mask & NECP_KERNEL_CONDITION_PID) { |
| 3144 | condition_tlv_length += (sizeof(pid_t) + sizeof(int32_t)); |
| 3145 | num_conditions++; |
| 3146 | } |
| 3147 | if (condition_mask & NECP_KERNEL_CONDITION_UID) { |
| 3148 | condition_tlv_length += sizeof(uid_t); |
| 3149 | num_conditions++; |
| 3150 | } |
| 3151 | if (condition_mask & NECP_KERNEL_CONDITION_REAL_UID) { |
| 3152 | condition_tlv_length += sizeof(uid_t); |
| 3153 | num_conditions++; |
| 3154 | } |
| 3155 | if (condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) { |
| 3156 | condition_tlv_length += sizeof(struct necp_policy_condition_tc_range); |
| 3157 | num_conditions++; |
| 3158 | } |
| 3159 | if (condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT) { |
| 3160 | num_conditions++; |
| 3161 | } |
| 3162 | if (condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT) { |
| 3163 | u_int32_t entitlement_len = strlen(s: policy->cond_custom_entitlement) + 1; |
| 3164 | condition_tlv_length += entitlement_len; |
| 3165 | num_conditions++; |
| 3166 | } |
| 3167 | if (condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY) { |
| 3168 | num_conditions++; |
| 3169 | } |
| 3170 | if (condition_mask & NECP_KERNEL_CONDITION_SYSTEM_SIGNED_RESULT) { |
| 3171 | num_conditions++; |
| 3172 | } |
| 3173 | if (condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION) { |
| 3174 | condition_tlv_length += sizeof(struct necp_policy_condition_sdk_version); |
| 3175 | num_conditions++; |
| 3176 | } |
| 3177 | if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) { |
| 3178 | num_conditions++; |
| 3179 | } |
| 3180 | if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) { |
| 3181 | if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 3182 | condition_tlv_length += sizeof(struct necp_policy_condition_addr_range); |
| 3183 | } else { |
| 3184 | condition_tlv_length += sizeof(struct necp_policy_condition_addr); |
| 3185 | } |
| 3186 | num_conditions++; |
| 3187 | } |
| 3188 | if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) { |
| 3189 | if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 3190 | condition_tlv_length += sizeof(struct necp_policy_condition_addr_range); |
| 3191 | } else { |
| 3192 | condition_tlv_length += sizeof(struct necp_policy_condition_addr); |
| 3193 | } |
| 3194 | num_conditions++; |
| 3195 | } |
| 3196 | if (condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE) { |
| 3197 | condition_tlv_length += sizeof(struct necp_policy_condition_agent_type); |
| 3198 | num_conditions++; |
| 3199 | } |
| 3200 | if (condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) { |
| 3201 | condition_tlv_length += sizeof(u_int32_t); |
| 3202 | num_conditions++; |
| 3203 | } |
| 3204 | if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) { |
| 3205 | num_conditions++; |
| 3206 | } |
| 3207 | if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY) { |
| 3208 | num_conditions++; |
| 3209 | } |
| 3210 | if (condition_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) { |
| 3211 | u_int32_t identifier_len = strlen(s: policy->cond_signing_identifier) + 1; |
| 3212 | condition_tlv_length += identifier_len; |
| 3213 | num_conditions++; |
| 3214 | } |
| 3215 | if (condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) { |
| 3216 | condition_tlv_length += sizeof(u_int16_t); |
| 3217 | num_conditions++; |
| 3218 | } |
| 3219 | if (condition_mask & NECP_KERNEL_CONDITION_IS_LOOPBACK) { |
| 3220 | num_conditions++; |
| 3221 | } |
| 3222 | if (condition_mask & NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY) { |
| 3223 | num_conditions++; |
| 3224 | } |
| 3225 | if (condition_mask & NECP_KERNEL_CONDITION_SCHEME_PORT) { |
| 3226 | condition_tlv_length += sizeof(u_int16_t); |
| 3227 | num_conditions++; |
| 3228 | } |
| 3229 | if (condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) { |
| 3230 | condition_tlv_length += (sizeof(u_int32_t) * NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_MAX); |
| 3231 | num_conditions++; |
| 3232 | } |
| 3233 | } |
| 3234 | |
| 3235 | condition_tlv_length += num_conditions * (sizeof(u_int8_t) + sizeof(u_int32_t)); // These are for the condition TLVs. The space for "value" is already accounted for above. |
| 3236 | total_allocated_bytes += condition_tlv_length; |
| 3237 | |
| 3238 | u_int8_t *tlv_buffer; |
| 3239 | tlv_buffer = (u_int8_t *)kalloc_data(total_allocated_bytes, Z_NOWAIT | Z_ZERO); |
| 3240 | if (tlv_buffer == NULL) { |
| 3241 | NECPLOG(LOG_DEBUG, "Failed to allocate tlv_buffer (%u bytes)", total_allocated_bytes); |
| 3242 | continue; |
| 3243 | } |
| 3244 | |
| 3245 | u_int8_t *cursor = tlv_buffer; |
| 3246 | cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ID, length: sizeof(policy->id), value: &policy->id, buffer: tlv_buffer, buffer_length: total_allocated_bytes); |
| 3247 | cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_ORDER, length: sizeof(necp_policy_order), value: &policy->order, buffer: tlv_buffer, buffer_length: total_allocated_bytes); |
| 3248 | cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_SESSION_ORDER, length: sizeof(policy->session_order), value: &policy->session_order, buffer: tlv_buffer, buffer_length: total_allocated_bytes); |
| 3249 | cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_RESULT_STRING, length: result_string_len, value: result_string, buffer: tlv_buffer, buffer_length: total_allocated_bytes); |
| 3250 | cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_OWNER, length: proc_name_len, value: proc_name_string, buffer: tlv_buffer, buffer_length: total_allocated_bytes); |
| 3251 | |
| 3252 | #define N_QUICK 256 |
| 3253 | u_int8_t q_cond_buf[N_QUICK]; // Minor optimization |
| 3254 | |
| 3255 | u_int8_t *cond_buf; // To be used for condition TLVs |
| 3256 | if (condition_tlv_length <= N_QUICK) { |
| 3257 | cond_buf = q_cond_buf; |
| 3258 | } else { |
| 3259 | cond_buf = (u_int8_t *)kalloc_data(condition_tlv_length, Z_NOWAIT); |
| 3260 | if (cond_buf == NULL) { |
| 3261 | NECPLOG(LOG_DEBUG, "Failed to allocate cond_buffer (%u bytes)", condition_tlv_length); |
| 3262 | kfree_data(tlv_buffer, total_allocated_bytes); |
| 3263 | continue; |
| 3264 | } |
| 3265 | } |
| 3266 | |
| 3267 | memset(s: cond_buf, c: 0, n: condition_tlv_length); |
| 3268 | u_int8_t *cond_buf_cursor = cond_buf; |
| 3269 | if (condition_mask == NECP_POLICY_CONDITION_DEFAULT) { |
| 3270 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_DEFAULT, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3271 | } else { |
| 3272 | if (condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) { |
| 3273 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_ALL_INTERFACES, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3274 | } |
| 3275 | if (condition_mask & NECP_KERNEL_CONDITION_HAS_CLIENT) { |
| 3276 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_HAS_CLIENT, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3277 | } |
| 3278 | if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) { |
| 3279 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_LOCAL_NETWORKS, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3280 | } |
| 3281 | if (condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) { |
| 3282 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_BOUND_INTERFACE, length: strlen(s: if_name) + 1, |
| 3283 | value: if_name, buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3284 | } |
| 3285 | if (condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) { |
| 3286 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_IP_PROTOCOL, length: sizeof(policy->cond_protocol), value: &policy->cond_protocol, |
| 3287 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3288 | } |
| 3289 | if (condition_mask & NECP_KERNEL_CONDITION_APP_ID) { |
| 3290 | struct necp_uuid_id_mapping *entry = necp_uuid_lookup_uuid_with_app_id_locked(local_id: policy->cond_app_id); |
| 3291 | if (entry != NULL) { |
| 3292 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_APPLICATION, length: sizeof(entry->uuid), value: entry->uuid, |
| 3293 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3294 | } |
| 3295 | } |
| 3296 | if (condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) { |
| 3297 | struct necp_uuid_id_mapping *entry = necp_uuid_lookup_uuid_with_app_id_locked(local_id: policy->cond_real_app_id); |
| 3298 | if (entry != NULL) { |
| 3299 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_REAL_APPLICATION, length: sizeof(entry->uuid), value: entry->uuid, |
| 3300 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3301 | } |
| 3302 | } |
| 3303 | if ((condition_mask & NECP_KERNEL_CONDITION_DOMAIN) || |
| 3304 | (condition_mask & NECP_KERNEL_CONDITION_EXACT_DOMAIN)) { |
| 3305 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_DOMAIN, length: strlen(s: policy->cond_domain) + 1, value: policy->cond_domain, |
| 3306 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3307 | } |
| 3308 | if (condition_mask & NECP_KERNEL_CONDITION_DOMAIN_FILTER) { |
| 3309 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_DOMAIN_FILTER, length: sizeof(policy->cond_domain_filter), value: &policy->cond_domain_filter, |
| 3310 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3311 | } |
| 3312 | if (condition_mask & NECP_KERNEL_CONDITION_URL) { |
| 3313 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_URL, length: strlen(s: policy->cond_url) + 1, value: policy->cond_url, |
| 3314 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3315 | } |
| 3316 | if (condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID) { |
| 3317 | if (account_id_entry != NULL) { |
| 3318 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_ACCOUNT, length: strlen(s: account_id_entry->string) + 1, value: account_id_entry->string, |
| 3319 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3320 | } |
| 3321 | } |
| 3322 | if (condition_mask & NECP_KERNEL_CONDITION_PID) { |
| 3323 | uint8_t pid_buffer[sizeof(policy->cond_pid) + sizeof(policy->cond_pid_version)] = { }; |
| 3324 | memcpy(dst: pid_buffer, src: &policy->cond_pid, n: sizeof(policy->cond_pid)); |
| 3325 | memcpy(dst: pid_buffer + sizeof(policy->cond_pid), src: &policy->cond_pid_version, n: sizeof(policy->cond_pid_version)); |
| 3326 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_PID, length: sizeof(pid_buffer), value: &pid_buffer, |
| 3327 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3328 | } |
| 3329 | if (condition_mask & NECP_KERNEL_CONDITION_UID) { |
| 3330 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_UID, length: sizeof(policy->cond_uid), value: &policy->cond_uid, |
| 3331 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3332 | } |
| 3333 | if (condition_mask & NECP_KERNEL_CONDITION_REAL_UID) { |
| 3334 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_REAL_UID, length: sizeof(policy->cond_real_uid), value: &policy->cond_real_uid, |
| 3335 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3336 | } |
| 3337 | if (condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) { |
| 3338 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_TRAFFIC_CLASS, length: sizeof(policy->cond_traffic_class), value: &policy->cond_traffic_class, |
| 3339 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3340 | } |
| 3341 | if (condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT) { |
| 3342 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_ENTITLEMENT, length: 0, value: "", |
| 3343 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3344 | } |
| 3345 | if (condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT) { |
| 3346 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_ENTITLEMENT, length: strlen(s: policy->cond_custom_entitlement) + 1, value: policy->cond_custom_entitlement, |
| 3347 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3348 | } |
| 3349 | if (condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY) { |
| 3350 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_PLATFORM_BINARY, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3351 | } |
| 3352 | if (condition_mask & NECP_KERNEL_CONDITION_SYSTEM_SIGNED_RESULT) { |
| 3353 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_SYSTEM_SIGNED_RESULT, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3354 | } |
| 3355 | if (condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION) { |
| 3356 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_SDK_VERSION, |
| 3357 | length: sizeof(policy->cond_sdk_version), value: &policy->cond_sdk_version, |
| 3358 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3359 | } |
| 3360 | if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) { |
| 3361 | if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 3362 | struct necp_policy_condition_addr_range range; |
| 3363 | memcpy(dst: &range.start_address, src: &policy->cond_local_start, n: sizeof(policy->cond_local_start)); |
| 3364 | memcpy(dst: &range.end_address, src: &policy->cond_local_end, n: sizeof(policy->cond_local_end)); |
| 3365 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE, length: sizeof(range), value: &range, |
| 3366 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3367 | } else { |
| 3368 | struct necp_policy_condition_addr addr; |
| 3369 | addr.prefix = policy->cond_local_prefix; |
| 3370 | memcpy(dst: &addr.address, src: &policy->cond_local_start, n: sizeof(policy->cond_local_start)); |
| 3371 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_LOCAL_ADDR, length: sizeof(addr), value: &addr, |
| 3372 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3373 | } |
| 3374 | } |
| 3375 | if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) { |
| 3376 | if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 3377 | struct necp_policy_condition_addr_range range; |
| 3378 | memcpy(dst: &range.start_address, src: &policy->cond_remote_start, n: sizeof(policy->cond_remote_start)); |
| 3379 | memcpy(dst: &range.end_address, src: &policy->cond_remote_end, n: sizeof(policy->cond_remote_end)); |
| 3380 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE, length: sizeof(range), value: &range, |
| 3381 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3382 | } else { |
| 3383 | struct necp_policy_condition_addr addr; |
| 3384 | addr.prefix = policy->cond_remote_prefix; |
| 3385 | memcpy(dst: &addr.address, src: &policy->cond_remote_start, n: sizeof(policy->cond_remote_start)); |
| 3386 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_REMOTE_ADDR, length: sizeof(addr), value: &addr, |
| 3387 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3388 | } |
| 3389 | } |
| 3390 | if (condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE) { |
| 3391 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_AGENT_TYPE, |
| 3392 | length: sizeof(policy->cond_agent_type), value: &policy->cond_agent_type, |
| 3393 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3394 | } |
| 3395 | if (condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) { |
| 3396 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_CLIENT_FLAGS, length: sizeof(policy->cond_client_flags), value: &policy->cond_client_flags, buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3397 | } |
| 3398 | if (condition_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) { |
| 3399 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_EMPTY, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3400 | } |
| 3401 | if (condition_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY) { |
| 3402 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_EMPTY, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3403 | } |
| 3404 | if (condition_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) { |
| 3405 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_SIGNING_IDENTIFIER, length: strlen(s: policy->cond_signing_identifier) + 1, value: policy->cond_signing_identifier, |
| 3406 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3407 | } |
| 3408 | if (condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) { |
| 3409 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_PACKET_FILTER_TAGS, length: sizeof(policy->cond_packet_filter_tags), value: &policy->cond_packet_filter_tags, buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3410 | } |
| 3411 | if (condition_mask & NECP_KERNEL_CONDITION_IS_LOOPBACK) { |
| 3412 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_FLOW_IS_LOOPBACK, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3413 | } |
| 3414 | if (condition_mask & NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY) { |
| 3415 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_DELEGATE_IS_PLATFORM_BINARY, length: 0, value: "", buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3416 | } |
| 3417 | if (condition_mask & NECP_KERNEL_CONDITION_SCHEME_PORT) { |
| 3418 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_SCHEME_PORT, length: sizeof(policy->cond_scheme_port), value: &policy->cond_scheme_port, buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3419 | } |
| 3420 | if (condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) { |
| 3421 | uint32_t flags[NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_MAX] = {}; |
| 3422 | flags[NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_FLAGS] = policy->cond_bound_interface_flags; |
| 3423 | flags[NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_EFLAGS] = policy->cond_bound_interface_eflags; |
| 3424 | flags[NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_XFLAGS] = policy->cond_bound_interface_xflags; |
| 3425 | cond_buf_cursor = necp_buffer_write_tlv(cursor: cond_buf_cursor, NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS, length: sizeof(flags), value: &flags, |
| 3426 | buffer: cond_buf, buffer_length: condition_tlv_length); |
| 3427 | } |
| 3428 | } |
| 3429 | |
| 3430 | cursor = necp_buffer_write_tlv(cursor, NECP_TLV_POLICY_CONDITION, length: cond_buf_cursor - cond_buf, value: cond_buf, buffer: tlv_buffer, buffer_length: total_allocated_bytes); |
| 3431 | if (cond_buf != q_cond_buf) { |
| 3432 | kfree_data(cond_buf, condition_tlv_length); |
| 3433 | } |
| 3434 | |
| 3435 | tlv_buffer_pointers[policy_i] = tlv_buffer; |
| 3436 | tlv_buffer_lengths[policy_i] = (cursor - tlv_buffer); |
| 3437 | |
| 3438 | // This is the length of the TLV for NECP_TLV_POLICY_DUMP |
| 3439 | total_tlv_len += sizeof(u_int8_t) + sizeof(u_int32_t) + (cursor - tlv_buffer); |
| 3440 | } |
| 3441 | |
| 3442 | // UNLOCK |
| 3443 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 3444 | |
| 3445 | // Copy out |
| 3446 | if (out_buffer != 0) { |
| 3447 | if (out_buffer_length < total_tlv_len + sizeof(u_int32_t)) { |
| 3448 | NECPLOG(LOG_DEBUG, "out_buffer_length too small (%lu < %lu)", out_buffer_length, total_tlv_len + sizeof(u_int32_t)); |
| 3449 | REPORT_ERROR(NECP_ERROR_INVALID_TLV); |
| 3450 | } |
| 3451 | |
| 3452 | // Allow malloc to wait, since the total buffer may be large and we are not holding any locks |
| 3453 | result_buf = (u_int8_t *)kalloc_data(total_tlv_len + sizeof(u_int32_t), Z_WAITOK | Z_ZERO); |
| 3454 | if (result_buf == NULL) { |
| 3455 | NECPLOG(LOG_DEBUG, "Failed to allocate result_buffer (%lu bytes)", total_tlv_len + sizeof(u_int32_t)); |
| 3456 | REPORT_ERROR(NECP_ERROR_INTERNAL); |
| 3457 | } |
| 3458 | |
| 3459 | // Add four bytes for total length at the start |
| 3460 | memcpy(dst: result_buf, src: &total_tlv_len, n: sizeof(u_int32_t)); |
| 3461 | |
| 3462 | // Copy the TLVs |
| 3463 | result_buf_cursor = result_buf + sizeof(u_int32_t); |
| 3464 | for (int i = 0; i < policy_count; i++) { |
| 3465 | if (tlv_buffer_pointers[i] != NULL) { |
| 3466 | result_buf_cursor = necp_buffer_write_tlv(cursor: result_buf_cursor, NECP_TLV_POLICY_DUMP, length: tlv_buffer_lengths[i], value: tlv_buffer_pointers[i], |
| 3467 | buffer: result_buf, buffer_length: total_tlv_len + sizeof(u_int32_t)); |
| 3468 | } |
| 3469 | } |
| 3470 | |
| 3471 | int copy_error = copyout(result_buf, out_buffer, total_tlv_len + sizeof(u_int32_t)); |
| 3472 | if (copy_error) { |
| 3473 | NECPLOG(LOG_DEBUG, "Failed to copy out result_buffer (%lu bytes)", total_tlv_len + sizeof(u_int32_t)); |
| 3474 | REPORT_ERROR(NECP_ERROR_INTERNAL); |
| 3475 | } |
| 3476 | } |
| 3477 | |
| 3478 | done: |
| 3479 | |
| 3480 | if (error_occured) { |
| 3481 | error_code = necp_get_posix_error_for_necp_error(response_error); |
| 3482 | } |
| 3483 | |
| 3484 | if (result_buf != NULL) { |
| 3485 | kfree_data(result_buf, total_tlv_len + sizeof(u_int32_t)); |
| 3486 | } |
| 3487 | |
| 3488 | if (tlv_buffer_pointers != NULL) { |
| 3489 | for (int i = 0; i < policy_count; i++) { |
| 3490 | if (tlv_buffer_pointers[i] != NULL) { |
| 3491 | kfree_data_addr(tlv_buffer_pointers[i]); |
| 3492 | tlv_buffer_pointers[i] = NULL; |
| 3493 | } |
| 3494 | } |
| 3495 | kfree_type(u_int8_t *, policy_count, tlv_buffer_pointers); |
| 3496 | } |
| 3497 | |
| 3498 | if (tlv_buffer_lengths != NULL) { |
| 3499 | kfree_data(tlv_buffer_lengths, sizeof(*tlv_buffer_lengths) * policy_count); |
| 3500 | } |
| 3501 | #undef N_QUICK |
| 3502 | #undef RESET_COND_BUF |
| 3503 | #undef REPORT_ERROR |
| 3504 | #undef UNLOCK_AND_REPORT_ERROR |
| 3505 | |
| 3506 | return error_code; |
| 3507 | } |
| 3508 | |
| 3509 | static struct necp_session_policy * |
| 3510 | necp_policy_create(struct necp_session *session, necp_policy_order order, u_int8_t *conditions_array, u_int32_t conditions_array_size, u_int8_t *route_rules_array, u_int32_t route_rules_array_size, u_int8_t *result, u_int32_t result_size) |
| 3511 | { |
| 3512 | struct necp_session_policy *new_policy = NULL; |
| 3513 | struct necp_session_policy *tmp_policy = NULL; |
| 3514 | |
| 3515 | if (session == NULL || conditions_array == NULL || result == NULL || result_size == 0) { |
| 3516 | goto done; |
| 3517 | } |
| 3518 | |
| 3519 | new_policy = zalloc_flags(necp_session_policy_zone, Z_WAITOK | Z_ZERO); |
| 3520 | new_policy->applied = FALSE; |
| 3521 | new_policy->pending_deletion = FALSE; |
| 3522 | new_policy->pending_update = FALSE; |
| 3523 | new_policy->order = order; |
| 3524 | new_policy->conditions = conditions_array; |
| 3525 | new_policy->conditions_size = conditions_array_size; |
| 3526 | new_policy->route_rules = route_rules_array; |
| 3527 | new_policy->route_rules_size = route_rules_array_size; |
| 3528 | new_policy->result = result; |
| 3529 | new_policy->result_size = result_size; |
| 3530 | new_policy->local_id = necp_policy_get_new_id(session); |
| 3531 | |
| 3532 | LIST_INSERT_SORTED_ASCENDING(&session->policies, new_policy, chain, order, tmp_policy); |
| 3533 | |
| 3534 | session->dirty = TRUE; |
| 3535 | |
| 3536 | if (necp_debug) { |
| 3537 | NECPLOG(LOG_DEBUG, "Created NECP policy, order %d", order); |
| 3538 | } |
| 3539 | done: |
| 3540 | return new_policy; |
| 3541 | } |
| 3542 | |
| 3543 | static struct necp_session_policy * |
| 3544 | necp_policy_find(struct necp_session *session, necp_policy_id policy_id) |
| 3545 | { |
| 3546 | struct necp_session_policy *policy = NULL; |
| 3547 | if (policy_id == 0) { |
| 3548 | return NULL; |
| 3549 | } |
| 3550 | |
| 3551 | LIST_FOREACH(policy, &session->policies, chain) { |
| 3552 | if (policy->local_id == policy_id) { |
| 3553 | return policy; |
| 3554 | } |
| 3555 | } |
| 3556 | |
| 3557 | return NULL; |
| 3558 | } |
| 3559 | |
| 3560 | static inline u_int8_t |
| 3561 | necp_policy_get_result_type(struct necp_session_policy *policy) |
| 3562 | { |
| 3563 | return policy ? necp_policy_result_get_type_from_buffer(buffer: policy->result, length: policy->result_size) : 0; |
| 3564 | } |
| 3565 | |
| 3566 | static inline u_int32_t |
| 3567 | necp_policy_get_result_parameter_length(struct necp_session_policy *policy) |
| 3568 | { |
| 3569 | return policy ? necp_policy_result_get_parameter_length_from_buffer(buffer: policy->result, length: policy->result_size) : 0; |
| 3570 | } |
| 3571 | |
| 3572 | static bool |
| 3573 | necp_policy_get_result_parameter(struct necp_session_policy *policy, u_int8_t *parameter_buffer, u_int32_t parameter_buffer_length) |
| 3574 | { |
| 3575 | if (policy) { |
| 3576 | u_int32_t parameter_length = necp_policy_result_get_parameter_length_from_buffer(buffer: policy->result, length: policy->result_size); |
| 3577 | if (parameter_buffer_length >= parameter_length) { |
| 3578 | u_int8_t *parameter = necp_policy_result_get_parameter_pointer_from_buffer(buffer: policy->result, length: policy->result_size); |
| 3579 | if (parameter && parameter_buffer) { |
| 3580 | memcpy(dst: parameter_buffer, src: parameter, n: parameter_length); |
| 3581 | return TRUE; |
| 3582 | } |
| 3583 | } |
| 3584 | } |
| 3585 | |
| 3586 | return FALSE; |
| 3587 | } |
| 3588 | |
| 3589 | static bool |
| 3590 | necp_policy_mark_for_deletion(struct necp_session *session, struct necp_session_policy *policy) |
| 3591 | { |
| 3592 | if (session == NULL || policy == NULL) { |
| 3593 | return FALSE; |
| 3594 | } |
| 3595 | |
| 3596 | policy->pending_deletion = TRUE; |
| 3597 | session->dirty = TRUE; |
| 3598 | |
| 3599 | if (necp_debug) { |
| 3600 | NECPLOG0(LOG_DEBUG, "Marked NECP policy for removal"); |
| 3601 | } |
| 3602 | return TRUE; |
| 3603 | } |
| 3604 | |
| 3605 | static bool |
| 3606 | necp_policy_mark_all_for_deletion(struct necp_session *session) |
| 3607 | { |
| 3608 | struct necp_session_policy *policy = NULL; |
| 3609 | struct necp_session_policy *temp_policy = NULL; |
| 3610 | |
| 3611 | LIST_FOREACH_SAFE(policy, &session->policies, chain, temp_policy) { |
| 3612 | necp_policy_mark_for_deletion(session, policy); |
| 3613 | } |
| 3614 | |
| 3615 | return TRUE; |
| 3616 | } |
| 3617 | |
| 3618 | static bool |
| 3619 | necp_policy_delete(struct necp_session *session, struct necp_session_policy *policy) |
| 3620 | { |
| 3621 | if (session == NULL || policy == NULL) { |
| 3622 | return FALSE; |
| 3623 | } |
| 3624 | |
| 3625 | LIST_REMOVE(policy, chain); |
| 3626 | |
| 3627 | if (policy->result) { |
| 3628 | kfree_data(policy->result, policy->result_size); |
| 3629 | policy->result = NULL; |
| 3630 | } |
| 3631 | |
| 3632 | if (policy->conditions) { |
| 3633 | kfree_data(policy->conditions, policy->conditions_size); |
| 3634 | policy->conditions = NULL; |
| 3635 | } |
| 3636 | |
| 3637 | if (policy->route_rules) { |
| 3638 | kfree_data(policy->route_rules, policy->route_rules_size); |
| 3639 | policy->route_rules = NULL; |
| 3640 | } |
| 3641 | |
| 3642 | zfree(necp_session_policy_zone, policy); |
| 3643 | |
| 3644 | if (necp_debug) { |
| 3645 | NECPLOG0(LOG_DEBUG, "Removed NECP policy"); |
| 3646 | } |
| 3647 | return TRUE; |
| 3648 | } |
| 3649 | |
| 3650 | static bool |
| 3651 | necp_policy_unapply(struct necp_session_policy *policy) |
| 3652 | { |
| 3653 | int i = 0; |
| 3654 | if (policy == NULL) { |
| 3655 | return FALSE; |
| 3656 | } |
| 3657 | |
| 3658 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 3659 | |
| 3660 | // Release local uuid mappings |
| 3661 | if (!uuid_is_null(uu: policy->applied_app_uuid)) { |
| 3662 | bool removed_mapping = FALSE; |
| 3663 | if (necp_remove_uuid_app_id_mapping(uuid: policy->applied_app_uuid, removed_mapping: &removed_mapping, TRUE) && removed_mapping) { |
| 3664 | necp_uuid_app_id_mappings_dirty = TRUE; |
| 3665 | necp_num_uuid_app_id_mappings--; |
| 3666 | } |
| 3667 | uuid_clear(uu: policy->applied_app_uuid); |
| 3668 | } |
| 3669 | if (!uuid_is_null(uu: policy->applied_real_app_uuid)) { |
| 3670 | necp_remove_uuid_app_id_mapping(uuid: policy->applied_real_app_uuid, NULL, FALSE); |
| 3671 | uuid_clear(uu: policy->applied_real_app_uuid); |
| 3672 | } |
| 3673 | if (!uuid_is_null(uu: policy->applied_result_uuid)) { |
| 3674 | necp_remove_uuid_service_id_mapping(uuid: policy->applied_result_uuid); |
| 3675 | uuid_clear(uu: policy->applied_result_uuid); |
| 3676 | } |
| 3677 | |
| 3678 | // Release string mappings |
| 3679 | if (policy->applied_account != NULL) { |
| 3680 | necp_remove_string_to_id_mapping(list: &necp_account_id_list, domain: policy->applied_account); |
| 3681 | kfree_data(policy->applied_account, policy->applied_account_size); |
| 3682 | policy->applied_account = NULL; |
| 3683 | } |
| 3684 | |
| 3685 | // Release route rule |
| 3686 | if (policy->applied_route_rules_id != 0) { |
| 3687 | necp_remove_route_rule(list: &necp_route_rules, route_rule_id: policy->applied_route_rules_id); |
| 3688 | policy->applied_route_rules_id = 0; |
| 3689 | } |
| 3690 | |
| 3691 | // Remove socket policies |
| 3692 | for (i = 0; i < MAX_KERNEL_SOCKET_POLICIES; i++) { |
| 3693 | if (policy->kernel_socket_policies[i] != 0) { |
| 3694 | necp_kernel_socket_policy_delete(policy_id: policy->kernel_socket_policies[i]); |
| 3695 | policy->kernel_socket_policies[i] = 0; |
| 3696 | } |
| 3697 | } |
| 3698 | |
| 3699 | // Remove IP output policies |
| 3700 | for (i = 0; i < MAX_KERNEL_IP_OUTPUT_POLICIES; i++) { |
| 3701 | if (policy->kernel_ip_output_policies[i] != 0) { |
| 3702 | necp_kernel_ip_output_policy_delete(policy_id: policy->kernel_ip_output_policies[i]); |
| 3703 | policy->kernel_ip_output_policies[i] = 0; |
| 3704 | } |
| 3705 | } |
| 3706 | |
| 3707 | policy->applied = FALSE; |
| 3708 | |
| 3709 | return TRUE; |
| 3710 | } |
| 3711 | |
| 3712 | #define NECP_KERNEL_POLICY_SUBORDER_ID_TUNNEL_CONDITION 0 |
| 3713 | #define NECP_KERNEL_POLICY_SUBORDER_NON_ID_TUNNEL_CONDITION 1 |
| 3714 | #define NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION 2 |
| 3715 | #define NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS 3 |
| 3716 | struct necp_policy_result_ip_tunnel { |
| 3717 | u_int32_t secondary_result; |
| 3718 | char interface_name[IFXNAMSIZ]; |
| 3719 | } __attribute__((__packed__)); |
| 3720 | |
| 3721 | struct necp_policy_result_service { |
| 3722 | uuid_t identifier; |
| 3723 | u_int32_t data; |
| 3724 | } __attribute__((__packed__)); |
| 3725 | |
| 3726 | static bool |
| 3727 | necp_policy_apply(struct necp_session *session, struct necp_session_policy *policy) |
| 3728 | { |
| 3729 | bool socket_only_conditions = FALSE; |
| 3730 | bool socket_ip_conditions = FALSE; |
| 3731 | |
| 3732 | bool socket_layer_non_id_conditions = FALSE; |
| 3733 | bool ip_output_layer_non_id_conditions = FALSE; |
| 3734 | bool ip_output_layer_non_id_only = FALSE; |
| 3735 | bool ip_output_layer_id_condition = FALSE; |
| 3736 | bool ip_output_layer_tunnel_condition_from_id = FALSE; |
| 3737 | bool ip_output_layer_tunnel_condition_from_non_id = FALSE; |
| 3738 | necp_kernel_policy_id cond_ip_output_layer_id = NECP_KERNEL_POLICY_ID_NONE; |
| 3739 | |
| 3740 | u_int64_t master_condition_mask = 0; |
| 3741 | u_int64_t master_condition_negated_mask = 0; |
| 3742 | ifnet_t cond_bound_interface = NULL; |
| 3743 | u_int32_t cond_account_id = 0; |
| 3744 | char *cond_domain = NULL; |
| 3745 | u_int32_t cond_domain_filter = 0; |
| 3746 | char *cond_url = NULL; |
| 3747 | char *cond_custom_entitlement = NULL; |
| 3748 | char *cond_signing_identifier = NULL; |
| 3749 | pid_t cond_pid = 0; |
| 3750 | int32_t cond_pid_version = 0; |
| 3751 | uid_t cond_uid = 0; |
| 3752 | uid_t cond_real_uid = 0; |
| 3753 | necp_app_id cond_app_id = 0; |
| 3754 | necp_app_id cond_real_app_id = 0; |
| 3755 | struct necp_policy_condition_tc_range cond_traffic_class; |
| 3756 | cond_traffic_class.start_tc = 0; |
| 3757 | cond_traffic_class.end_tc = 0; |
| 3758 | u_int16_t cond_protocol = 0; |
| 3759 | union necp_sockaddr_union cond_local_start; |
| 3760 | union necp_sockaddr_union cond_local_end; |
| 3761 | u_int8_t cond_local_prefix = 0; |
| 3762 | union necp_sockaddr_union cond_remote_start; |
| 3763 | union necp_sockaddr_union cond_remote_end; |
| 3764 | u_int8_t cond_remote_prefix = 0; |
| 3765 | u_int32_t cond_client_flags = 0; |
| 3766 | u_int32_t offset = 0; |
| 3767 | u_int8_t ultimate_result = 0; |
| 3768 | u_int32_t secondary_result = 0; |
| 3769 | struct necp_policy_condition_agent_type cond_agent_type = {}; |
| 3770 | struct necp_policy_condition_sdk_version cond_sdk_version = {}; |
| 3771 | u_int16_t cond_packet_filter_tags = 0; |
| 3772 | u_int16_t cond_scheme_port = 0; |
| 3773 | u_int32_t cond_bound_interface_flags = 0; |
| 3774 | u_int32_t cond_bound_interface_eflags = 0; |
| 3775 | u_int32_t cond_bound_interface_xflags = 0; |
| 3776 | necp_kernel_policy_result_parameter secondary_result_parameter; |
| 3777 | memset(s: &secondary_result_parameter, c: 0, n: sizeof(secondary_result_parameter)); |
| 3778 | u_int32_t cond_last_interface_index = 0; |
| 3779 | necp_kernel_policy_result_parameter ultimate_result_parameter; |
| 3780 | memset(s: &ultimate_result_parameter, c: 0, n: sizeof(ultimate_result_parameter)); |
| 3781 | |
| 3782 | if (policy == NULL) { |
| 3783 | return FALSE; |
| 3784 | } |
| 3785 | |
| 3786 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 3787 | |
| 3788 | // Process conditions |
| 3789 | while (offset < policy->conditions_size) { |
| 3790 | u_int32_t length = 0; |
| 3791 | u_int8_t *value = necp_buffer_get_tlv_value(buffer: policy->conditions, tlv_offset: offset, value_size: &length); |
| 3792 | |
| 3793 | u_int8_t condition_type = necp_policy_condition_get_type_from_buffer(buffer: value, length); |
| 3794 | u_int8_t condition_flags = necp_policy_condition_get_flags_from_buffer(buffer: value, length); |
| 3795 | bool condition_is_negative = condition_flags & NECP_POLICY_CONDITION_FLAGS_NEGATIVE; |
| 3796 | u_int32_t condition_length = necp_policy_condition_get_value_length_from_buffer(buffer: value, length); |
| 3797 | u_int8_t *condition_value = necp_policy_condition_get_value_pointer_from_buffer(buffer: value, length); |
| 3798 | switch (condition_type) { |
| 3799 | case NECP_POLICY_CONDITION_DEFAULT: { |
| 3800 | socket_ip_conditions = TRUE; |
| 3801 | break; |
| 3802 | } |
| 3803 | case NECP_POLICY_CONDITION_ALL_INTERFACES: { |
| 3804 | master_condition_mask |= NECP_KERNEL_CONDITION_ALL_INTERFACES; |
| 3805 | socket_ip_conditions = TRUE; |
| 3806 | break; |
| 3807 | } |
| 3808 | case NECP_POLICY_CONDITION_HAS_CLIENT: { |
| 3809 | master_condition_mask |= NECP_KERNEL_CONDITION_HAS_CLIENT; |
| 3810 | socket_only_conditions = TRUE; |
| 3811 | break; |
| 3812 | } |
| 3813 | case NECP_POLICY_CONDITION_ENTITLEMENT: { |
| 3814 | if (condition_length > 0) { |
| 3815 | if (cond_custom_entitlement == NULL) { |
| 3816 | cond_custom_entitlement = necp_copy_string(string: (char *)condition_value, length: condition_length); |
| 3817 | if (cond_custom_entitlement != NULL) { |
| 3818 | master_condition_mask |= NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT; |
| 3819 | socket_only_conditions = TRUE; |
| 3820 | } |
| 3821 | } |
| 3822 | } else { |
| 3823 | master_condition_mask |= NECP_KERNEL_CONDITION_ENTITLEMENT; |
| 3824 | socket_only_conditions = TRUE; |
| 3825 | } |
| 3826 | break; |
| 3827 | } |
| 3828 | case NECP_POLICY_CONDITION_PLATFORM_BINARY: { |
| 3829 | master_condition_mask |= NECP_KERNEL_CONDITION_PLATFORM_BINARY; |
| 3830 | socket_only_conditions = TRUE; |
| 3831 | break; |
| 3832 | } |
| 3833 | case NECP_POLICY_CONDITION_SYSTEM_SIGNED_RESULT: { |
| 3834 | master_condition_mask |= NECP_KERNEL_CONDITION_SYSTEM_SIGNED_RESULT; |
| 3835 | socket_only_conditions = TRUE; |
| 3836 | break; |
| 3837 | } |
| 3838 | case NECP_POLICY_CONDITION_SDK_VERSION: { |
| 3839 | if (condition_length >= sizeof(cond_sdk_version)) { |
| 3840 | master_condition_mask |= NECP_KERNEL_CONDITION_SDK_VERSION; |
| 3841 | memcpy(dst: &cond_sdk_version, src: condition_value, n: sizeof(cond_sdk_version)); |
| 3842 | socket_only_conditions = TRUE; |
| 3843 | } |
| 3844 | break; |
| 3845 | } |
| 3846 | case NECP_POLICY_CONDITION_DOMAIN: { |
| 3847 | // Make sure there is only one such rule |
| 3848 | if (condition_length > 0 && cond_domain == NULL) { |
| 3849 | const bool condition_is_exact = condition_flags & NECP_POLICY_CONDITION_FLAGS_EXACT; |
| 3850 | |
| 3851 | u_int64_t mask_value = condition_is_exact ? NECP_KERNEL_CONDITION_EXACT_DOMAIN : NECP_KERNEL_CONDITION_DOMAIN; |
| 3852 | cond_domain = necp_create_trimmed_domain(string: (char *)condition_value, length: condition_length); |
| 3853 | if (cond_domain != NULL) { |
| 3854 | master_condition_mask |= mask_value; |
| 3855 | if (condition_is_negative) { |
| 3856 | master_condition_negated_mask |= mask_value; |
| 3857 | } |
| 3858 | socket_only_conditions = TRUE; |
| 3859 | } |
| 3860 | } |
| 3861 | break; |
| 3862 | } |
| 3863 | case NECP_POLICY_CONDITION_DOMAIN_FILTER: { |
| 3864 | // Make sure there is only one such rule |
| 3865 | if (condition_length >= sizeof(cond_domain_filter) && cond_domain_filter == 0) { |
| 3866 | memcpy(dst: &cond_domain_filter, src: condition_value, n: sizeof(cond_domain_filter)); |
| 3867 | if (cond_domain_filter != 0) { |
| 3868 | master_condition_mask |= NECP_KERNEL_CONDITION_DOMAIN_FILTER; |
| 3869 | if (condition_is_negative) { |
| 3870 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_DOMAIN_FILTER; |
| 3871 | } |
| 3872 | socket_only_conditions = TRUE; |
| 3873 | } |
| 3874 | } |
| 3875 | break; |
| 3876 | } |
| 3877 | case NECP_POLICY_CONDITION_URL: { |
| 3878 | // Make sure there is only one such rule |
| 3879 | if (condition_length > 0 && cond_url == NULL) { |
| 3880 | u_int64_t mask_value = NECP_KERNEL_CONDITION_URL; |
| 3881 | cond_url = necp_create_trimmed_domain(string: (char *)condition_value, length: condition_length); |
| 3882 | if (cond_url != NULL) { |
| 3883 | master_condition_mask |= mask_value; |
| 3884 | if (condition_is_negative) { |
| 3885 | master_condition_negated_mask |= mask_value; |
| 3886 | } |
| 3887 | socket_only_conditions = TRUE; |
| 3888 | } |
| 3889 | } |
| 3890 | break; |
| 3891 | } |
| 3892 | case NECP_POLICY_CONDITION_ACCOUNT: { |
| 3893 | // Make sure there is only one such rule |
| 3894 | if (condition_length > 0 && condition_length < UINT32_MAX && cond_account_id == 0 && policy->applied_account == NULL) { |
| 3895 | char *string = NULL; |
| 3896 | string = (char *)kalloc_data(condition_length + 1, Z_WAITOK); |
| 3897 | if (string != NULL) { |
| 3898 | memcpy(dst: string, src: condition_value, n: condition_length); |
| 3899 | string[condition_length] = 0; |
| 3900 | cond_account_id = necp_create_string_to_id_mapping(list: &necp_account_id_list, domain: string); |
| 3901 | if (cond_account_id != 0) { |
| 3902 | policy->applied_account = string; // Save the string in parent policy |
| 3903 | policy->applied_account_size = condition_length + 1; |
| 3904 | master_condition_mask |= NECP_KERNEL_CONDITION_ACCOUNT_ID; |
| 3905 | if (condition_is_negative) { |
| 3906 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_ACCOUNT_ID; |
| 3907 | } |
| 3908 | socket_only_conditions = TRUE; |
| 3909 | } else { |
| 3910 | kfree_data(string, condition_length + 1); |
| 3911 | } |
| 3912 | } |
| 3913 | } |
| 3914 | break; |
| 3915 | } |
| 3916 | case NECP_POLICY_CONDITION_APPLICATION: { |
| 3917 | // Make sure there is only one such rule, because we save the uuid in the policy |
| 3918 | if (condition_length >= sizeof(uuid_t) && cond_app_id == 0) { |
| 3919 | bool allocated_mapping = FALSE; |
| 3920 | uuid_t application_uuid; |
| 3921 | memcpy(dst: application_uuid, src: condition_value, n: sizeof(uuid_t)); |
| 3922 | cond_app_id = necp_create_uuid_app_id_mapping(uuid: application_uuid, allocated_mapping: &allocated_mapping, TRUE); |
| 3923 | if (cond_app_id != 0) { |
| 3924 | if (allocated_mapping) { |
| 3925 | necp_uuid_app_id_mappings_dirty = TRUE; |
| 3926 | necp_num_uuid_app_id_mappings++; |
| 3927 | } |
| 3928 | uuid_copy(dst: policy->applied_app_uuid, src: application_uuid); |
| 3929 | master_condition_mask |= NECP_KERNEL_CONDITION_APP_ID; |
| 3930 | if (condition_is_negative) { |
| 3931 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_APP_ID; |
| 3932 | } |
| 3933 | socket_only_conditions = TRUE; |
| 3934 | } |
| 3935 | } |
| 3936 | break; |
| 3937 | } |
| 3938 | case NECP_POLICY_CONDITION_REAL_APPLICATION: { |
| 3939 | // Make sure there is only one such rule, because we save the uuid in the policy |
| 3940 | if (condition_length >= sizeof(uuid_t) && cond_real_app_id == 0) { |
| 3941 | uuid_t real_application_uuid; |
| 3942 | memcpy(dst: real_application_uuid, src: condition_value, n: sizeof(uuid_t)); |
| 3943 | cond_real_app_id = necp_create_uuid_app_id_mapping(uuid: real_application_uuid, NULL, FALSE); |
| 3944 | if (cond_real_app_id != 0) { |
| 3945 | uuid_copy(dst: policy->applied_real_app_uuid, src: real_application_uuid); |
| 3946 | master_condition_mask |= NECP_KERNEL_CONDITION_REAL_APP_ID; |
| 3947 | if (condition_is_negative) { |
| 3948 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_REAL_APP_ID; |
| 3949 | } |
| 3950 | socket_only_conditions = TRUE; |
| 3951 | } |
| 3952 | } |
| 3953 | break; |
| 3954 | } |
| 3955 | case NECP_POLICY_CONDITION_PID: { |
| 3956 | if (condition_length >= sizeof(pid_t)) { |
| 3957 | master_condition_mask |= NECP_KERNEL_CONDITION_PID; |
| 3958 | if (condition_is_negative) { |
| 3959 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_PID; |
| 3960 | } |
| 3961 | memcpy(dst: &cond_pid, src: condition_value, n: sizeof(cond_pid)); |
| 3962 | if (condition_length >= (sizeof(pid_t) + sizeof(cond_pid_version))) { |
| 3963 | memcpy(dst: &cond_pid_version, src: (condition_value + sizeof(pid_t)), n: sizeof(cond_pid_version)); |
| 3964 | } |
| 3965 | socket_only_conditions = TRUE; |
| 3966 | } |
| 3967 | break; |
| 3968 | } |
| 3969 | case NECP_POLICY_CONDITION_UID: { |
| 3970 | if (condition_length >= sizeof(uid_t)) { |
| 3971 | master_condition_mask |= NECP_KERNEL_CONDITION_UID; |
| 3972 | if (condition_is_negative) { |
| 3973 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_UID; |
| 3974 | } |
| 3975 | memcpy(dst: &cond_uid, src: condition_value, n: sizeof(cond_uid)); |
| 3976 | socket_only_conditions = TRUE; |
| 3977 | } |
| 3978 | break; |
| 3979 | } |
| 3980 | case NECP_POLICY_CONDITION_REAL_UID: { |
| 3981 | if (condition_length >= sizeof(uid_t)) { |
| 3982 | master_condition_mask |= NECP_KERNEL_CONDITION_REAL_UID; |
| 3983 | if (condition_is_negative) { |
| 3984 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_REAL_UID; |
| 3985 | } |
| 3986 | memcpy(dst: &cond_real_uid, src: condition_value, n: sizeof(cond_real_uid)); |
| 3987 | socket_only_conditions = TRUE; |
| 3988 | } |
| 3989 | break; |
| 3990 | } |
| 3991 | case NECP_POLICY_CONDITION_TRAFFIC_CLASS: { |
| 3992 | if (condition_length >= sizeof(struct necp_policy_condition_tc_range)) { |
| 3993 | master_condition_mask |= NECP_KERNEL_CONDITION_TRAFFIC_CLASS; |
| 3994 | if (condition_is_negative) { |
| 3995 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_TRAFFIC_CLASS; |
| 3996 | } |
| 3997 | memcpy(dst: &cond_traffic_class, src: condition_value, n: sizeof(cond_traffic_class)); |
| 3998 | socket_only_conditions = TRUE; |
| 3999 | } |
| 4000 | break; |
| 4001 | } |
| 4002 | case NECP_POLICY_CONDITION_BOUND_INTERFACE: { |
| 4003 | if (condition_length <= IFXNAMSIZ && condition_length > 0) { |
| 4004 | char interface_name[IFXNAMSIZ]; |
| 4005 | memcpy(dst: interface_name, src: condition_value, n: condition_length); |
| 4006 | interface_name[condition_length - 1] = 0; // Make sure the string is NULL terminated |
| 4007 | if (ifnet_find_by_name(ifname: interface_name, interface: &cond_bound_interface) == 0) { |
| 4008 | master_condition_mask |= NECP_KERNEL_CONDITION_BOUND_INTERFACE; |
| 4009 | if (condition_is_negative) { |
| 4010 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_BOUND_INTERFACE; |
| 4011 | } |
| 4012 | } |
| 4013 | socket_ip_conditions = TRUE; |
| 4014 | } |
| 4015 | break; |
| 4016 | } |
| 4017 | case NECP_POLICY_CONDITION_IP_PROTOCOL: |
| 4018 | case NECP_POLICY_CONDITION_FLOW_IP_PROTOCOL: { |
| 4019 | if (condition_length >= sizeof(u_int16_t)) { |
| 4020 | master_condition_mask |= NECP_KERNEL_CONDITION_PROTOCOL; |
| 4021 | if (condition_is_negative) { |
| 4022 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_PROTOCOL; |
| 4023 | } |
| 4024 | memcpy(dst: &cond_protocol, src: condition_value, n: sizeof(cond_protocol)); |
| 4025 | if (condition_type == NECP_POLICY_CONDITION_FLOW_IP_PROTOCOL) { |
| 4026 | socket_only_conditions = TRUE; |
| 4027 | } else { |
| 4028 | socket_ip_conditions = TRUE; |
| 4029 | } |
| 4030 | } |
| 4031 | break; |
| 4032 | } |
| 4033 | case NECP_POLICY_CONDITION_LOCAL_NETWORKS: { |
| 4034 | master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_NETWORKS; |
| 4035 | socket_ip_conditions = TRUE; |
| 4036 | break; |
| 4037 | } |
| 4038 | case NECP_POLICY_CONDITION_LOCAL_ADDR: |
| 4039 | case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR: { |
| 4040 | struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)condition_value; |
| 4041 | if (!necp_address_is_valid(&address_struct->address.sa)) { |
| 4042 | break; |
| 4043 | } |
| 4044 | |
| 4045 | cond_local_prefix = address_struct->prefix; |
| 4046 | memcpy(dst: &cond_local_start, src: &address_struct->address, n: sizeof(address_struct->address)); |
| 4047 | master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_START; |
| 4048 | master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_PREFIX; |
| 4049 | if (condition_is_negative) { |
| 4050 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_START; |
| 4051 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_PREFIX; |
| 4052 | } |
| 4053 | if (condition_type == NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR) { |
| 4054 | socket_only_conditions = TRUE; |
| 4055 | } else { |
| 4056 | socket_ip_conditions = TRUE; |
| 4057 | } |
| 4058 | break; |
| 4059 | } |
| 4060 | case NECP_POLICY_CONDITION_REMOTE_ADDR: |
| 4061 | case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR: { |
| 4062 | struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)condition_value; |
| 4063 | if (!necp_address_is_valid(&address_struct->address.sa)) { |
| 4064 | break; |
| 4065 | } |
| 4066 | |
| 4067 | cond_remote_prefix = address_struct->prefix; |
| 4068 | memcpy(dst: &cond_remote_start, src: &address_struct->address, n: sizeof(address_struct->address)); |
| 4069 | master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_START; |
| 4070 | master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_PREFIX; |
| 4071 | if (condition_is_negative) { |
| 4072 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_START; |
| 4073 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_PREFIX; |
| 4074 | } |
| 4075 | if (condition_type == NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR) { |
| 4076 | socket_only_conditions = TRUE; |
| 4077 | } else { |
| 4078 | socket_ip_conditions = TRUE; |
| 4079 | } |
| 4080 | break; |
| 4081 | } |
| 4082 | case NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE: |
| 4083 | case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_RANGE: { |
| 4084 | struct necp_policy_condition_addr_range *address_struct = (struct necp_policy_condition_addr_range *)(void *)condition_value; |
| 4085 | if (!necp_address_is_valid(&address_struct->start_address.sa) || |
| 4086 | !necp_address_is_valid(&address_struct->end_address.sa)) { |
| 4087 | break; |
| 4088 | } |
| 4089 | |
| 4090 | memcpy(dst: &cond_local_start, src: &address_struct->start_address, n: sizeof(address_struct->start_address)); |
| 4091 | memcpy(dst: &cond_local_end, src: &address_struct->end_address, n: sizeof(address_struct->end_address)); |
| 4092 | master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_START; |
| 4093 | master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_END; |
| 4094 | if (condition_is_negative) { |
| 4095 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_START; |
| 4096 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_END; |
| 4097 | } |
| 4098 | if (condition_type == NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_RANGE) { |
| 4099 | socket_only_conditions = TRUE; |
| 4100 | } else { |
| 4101 | socket_ip_conditions = TRUE; |
| 4102 | } |
| 4103 | break; |
| 4104 | } |
| 4105 | case NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE: |
| 4106 | case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_RANGE: { |
| 4107 | struct necp_policy_condition_addr_range *address_struct = (struct necp_policy_condition_addr_range *)(void *)condition_value; |
| 4108 | if (!necp_address_is_valid(&address_struct->start_address.sa) || |
| 4109 | !necp_address_is_valid(&address_struct->end_address.sa)) { |
| 4110 | break; |
| 4111 | } |
| 4112 | |
| 4113 | memcpy(dst: &cond_remote_start, src: &address_struct->start_address, n: sizeof(address_struct->start_address)); |
| 4114 | memcpy(dst: &cond_remote_end, src: &address_struct->end_address, n: sizeof(address_struct->end_address)); |
| 4115 | master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_START; |
| 4116 | master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_END; |
| 4117 | if (condition_is_negative) { |
| 4118 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_START; |
| 4119 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_END; |
| 4120 | } |
| 4121 | if (condition_type == NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_RANGE) { |
| 4122 | socket_only_conditions = TRUE; |
| 4123 | } else { |
| 4124 | socket_ip_conditions = TRUE; |
| 4125 | } |
| 4126 | break; |
| 4127 | } |
| 4128 | case NECP_POLICY_CONDITION_AGENT_TYPE: { |
| 4129 | if (condition_length >= sizeof(cond_agent_type)) { |
| 4130 | master_condition_mask |= NECP_KERNEL_CONDITION_AGENT_TYPE; |
| 4131 | memcpy(dst: &cond_agent_type, src: condition_value, n: sizeof(cond_agent_type)); |
| 4132 | socket_only_conditions = TRUE; |
| 4133 | } |
| 4134 | break; |
| 4135 | } |
| 4136 | case NECP_POLICY_CONDITION_CLIENT_FLAGS: { |
| 4137 | if (condition_is_negative) { |
| 4138 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_CLIENT_FLAGS; |
| 4139 | } |
| 4140 | master_condition_mask |= NECP_KERNEL_CONDITION_CLIENT_FLAGS; |
| 4141 | socket_only_conditions = TRUE; |
| 4142 | if (condition_length >= sizeof(u_int32_t)) { |
| 4143 | memcpy(dst: &cond_client_flags, src: condition_value, n: sizeof(cond_client_flags)); |
| 4144 | } else { |
| 4145 | // Empty means match on fallback traffic |
| 4146 | cond_client_flags = NECP_CLIENT_PARAMETER_FLAG_FALLBACK_TRAFFIC; |
| 4147 | } |
| 4148 | break; |
| 4149 | } |
| 4150 | case NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_EMPTY: { |
| 4151 | master_condition_mask |= NECP_KERNEL_CONDITION_LOCAL_EMPTY; |
| 4152 | if (condition_is_negative) { |
| 4153 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_LOCAL_EMPTY; |
| 4154 | } |
| 4155 | socket_only_conditions = TRUE; |
| 4156 | break; |
| 4157 | } |
| 4158 | case NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_EMPTY: { |
| 4159 | master_condition_mask |= NECP_KERNEL_CONDITION_REMOTE_EMPTY; |
| 4160 | if (condition_is_negative) { |
| 4161 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_REMOTE_EMPTY; |
| 4162 | } |
| 4163 | socket_only_conditions = TRUE; |
| 4164 | break; |
| 4165 | } |
| 4166 | case NECP_POLICY_CONDITION_SCHEME_PORT: { |
| 4167 | master_condition_mask |= NECP_KERNEL_CONDITION_SCHEME_PORT; |
| 4168 | if (condition_is_negative) { |
| 4169 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_SCHEME_PORT; |
| 4170 | } |
| 4171 | memcpy(dst: &cond_scheme_port, src: condition_value, n: sizeof(cond_scheme_port)); |
| 4172 | socket_ip_conditions = TRUE; |
| 4173 | break; |
| 4174 | } |
| 4175 | case NECP_POLICY_CONDITION_SIGNING_IDENTIFIER: { |
| 4176 | if (condition_length > 0) { |
| 4177 | if (cond_signing_identifier == NULL) { |
| 4178 | cond_signing_identifier = necp_copy_string(string: (char *)condition_value, length: condition_length); |
| 4179 | if (cond_signing_identifier != NULL) { |
| 4180 | master_condition_mask |= NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER; |
| 4181 | socket_only_conditions = TRUE; |
| 4182 | if (condition_is_negative) { |
| 4183 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER; |
| 4184 | } |
| 4185 | } |
| 4186 | } |
| 4187 | } |
| 4188 | break; |
| 4189 | } |
| 4190 | case NECP_POLICY_CONDITION_PACKET_FILTER_TAGS: { |
| 4191 | if (condition_length >= sizeof(u_int16_t)) { |
| 4192 | master_condition_mask |= NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS; |
| 4193 | if (condition_is_negative) { |
| 4194 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS; |
| 4195 | } |
| 4196 | memcpy(dst: &cond_packet_filter_tags, src: condition_value, n: sizeof(cond_packet_filter_tags)); |
| 4197 | socket_ip_conditions = TRUE; |
| 4198 | } |
| 4199 | break; |
| 4200 | } |
| 4201 | case NECP_POLICY_CONDITION_FLOW_IS_LOOPBACK: { |
| 4202 | master_condition_mask |= NECP_KERNEL_CONDITION_IS_LOOPBACK; |
| 4203 | if (condition_is_negative) { |
| 4204 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_IS_LOOPBACK; |
| 4205 | } |
| 4206 | socket_only_conditions = TRUE; |
| 4207 | break; |
| 4208 | } |
| 4209 | case NECP_POLICY_CONDITION_DELEGATE_IS_PLATFORM_BINARY: { |
| 4210 | master_condition_mask |= NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY; |
| 4211 | if (condition_is_negative) { |
| 4212 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY; |
| 4213 | } |
| 4214 | socket_only_conditions = TRUE; |
| 4215 | break; |
| 4216 | } |
| 4217 | case NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS: { |
| 4218 | if (condition_length <= (sizeof(u_int32_t) * NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_MAX) && condition_length > 0) { |
| 4219 | u_int32_t flags[NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_MAX] = {}; |
| 4220 | memcpy(dst: &flags, src: condition_value, n: sizeof(flags)); |
| 4221 | cond_bound_interface_flags = flags[NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_FLAGS]; |
| 4222 | cond_bound_interface_eflags = flags[NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_EFLAGS]; |
| 4223 | cond_bound_interface_xflags = flags[NECP_POLICY_CONDITION_BOUND_INTERFACE_FLAGS_IDX_XFLAGS]; |
| 4224 | master_condition_mask |= NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS; |
| 4225 | if (condition_is_negative) { |
| 4226 | master_condition_negated_mask |= NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS; |
| 4227 | } |
| 4228 | socket_ip_conditions = TRUE; |
| 4229 | } |
| 4230 | break; |
| 4231 | } |
| 4232 | default: { |
| 4233 | break; |
| 4234 | } |
| 4235 | } |
| 4236 | |
| 4237 | offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length; |
| 4238 | } |
| 4239 | |
| 4240 | // Process result |
| 4241 | ultimate_result = necp_policy_get_result_type(policy); |
| 4242 | switch (ultimate_result) { |
| 4243 | case NECP_POLICY_RESULT_PASS: { |
| 4244 | u_int32_t pass_flags = 0; |
| 4245 | if (necp_policy_result_get_parameter_length_from_buffer(buffer: policy->result, length: policy->result_size) > 0) { |
| 4246 | if (necp_policy_get_result_parameter(policy, parameter_buffer: (u_int8_t *)&pass_flags, parameter_buffer_length: sizeof(pass_flags))) { |
| 4247 | ultimate_result_parameter.pass_flags = pass_flags; |
| 4248 | } |
| 4249 | } |
| 4250 | if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE |
| 4251 | socket_layer_non_id_conditions = TRUE; |
| 4252 | ip_output_layer_id_condition = TRUE; |
| 4253 | } else if (socket_ip_conditions) { |
| 4254 | socket_layer_non_id_conditions = TRUE; |
| 4255 | ip_output_layer_id_condition = TRUE; |
| 4256 | ip_output_layer_non_id_conditions = TRUE; |
| 4257 | } |
| 4258 | break; |
| 4259 | } |
| 4260 | case NECP_POLICY_RESULT_DROP: { |
| 4261 | u_int32_t drop_flags = 0; |
| 4262 | if (necp_policy_result_get_parameter_length_from_buffer(buffer: policy->result, length: policy->result_size) > 0) { |
| 4263 | if (necp_policy_get_result_parameter(policy, parameter_buffer: (u_int8_t *)&drop_flags, parameter_buffer_length: sizeof(drop_flags))) { |
| 4264 | ultimate_result_parameter.drop_flags = drop_flags; |
| 4265 | } |
| 4266 | } |
| 4267 | if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE |
| 4268 | socket_layer_non_id_conditions = TRUE; |
| 4269 | } else if (socket_ip_conditions) { |
| 4270 | socket_layer_non_id_conditions = TRUE; |
| 4271 | ip_output_layer_non_id_conditions = TRUE; |
| 4272 | ip_output_layer_non_id_only = TRUE; // Only apply drop to packets that didn't go through socket layer |
| 4273 | } |
| 4274 | break; |
| 4275 | } |
| 4276 | case NECP_POLICY_RESULT_SKIP: { |
| 4277 | u_int32_t skip_policy_order = 0; |
| 4278 | if (necp_policy_get_result_parameter(policy, parameter_buffer: (u_int8_t *)&skip_policy_order, parameter_buffer_length: sizeof(skip_policy_order))) { |
| 4279 | ultimate_result_parameter.skip_policy_order = skip_policy_order; |
| 4280 | } |
| 4281 | |
| 4282 | if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE |
| 4283 | socket_layer_non_id_conditions = TRUE; |
| 4284 | ip_output_layer_id_condition = TRUE; |
| 4285 | } else if (socket_ip_conditions) { |
| 4286 | socket_layer_non_id_conditions = TRUE; |
| 4287 | ip_output_layer_non_id_conditions = TRUE; |
| 4288 | } |
| 4289 | break; |
| 4290 | } |
| 4291 | case NECP_POLICY_RESULT_SOCKET_DIVERT: |
| 4292 | case NECP_POLICY_RESULT_SOCKET_FILTER: { |
| 4293 | u_int32_t control_unit = 0; |
| 4294 | if (necp_policy_get_result_parameter(policy, parameter_buffer: (u_int8_t *)&control_unit, parameter_buffer_length: sizeof(control_unit))) { |
| 4295 | ultimate_result_parameter.flow_divert_control_unit = control_unit; |
| 4296 | } |
| 4297 | socket_layer_non_id_conditions = TRUE; |
| 4298 | break; |
| 4299 | } |
| 4300 | case NECP_POLICY_RESULT_IP_TUNNEL: { |
| 4301 | struct necp_policy_result_ip_tunnel tunnel_parameters; |
| 4302 | u_int32_t tunnel_parameters_length = necp_policy_get_result_parameter_length(policy); |
| 4303 | if (tunnel_parameters_length > sizeof(u_int32_t) && |
| 4304 | tunnel_parameters_length <= sizeof(struct necp_policy_result_ip_tunnel) && |
| 4305 | necp_policy_get_result_parameter(policy, parameter_buffer: (u_int8_t *)&tunnel_parameters, parameter_buffer_length: sizeof(tunnel_parameters))) { |
| 4306 | ifnet_t tunnel_interface = NULL; |
| 4307 | tunnel_parameters.interface_name[tunnel_parameters_length - sizeof(u_int32_t) - 1] = 0; // Make sure the string is NULL terminated |
| 4308 | if (ifnet_find_by_name(ifname: tunnel_parameters.interface_name, interface: &tunnel_interface) == 0) { |
| 4309 | ultimate_result_parameter.tunnel_interface_index = tunnel_interface->if_index; |
| 4310 | ifnet_release(interface: tunnel_interface); |
| 4311 | } |
| 4312 | |
| 4313 | secondary_result = tunnel_parameters.secondary_result; |
| 4314 | if (secondary_result) { |
| 4315 | cond_last_interface_index = ultimate_result_parameter.tunnel_interface_index; |
| 4316 | } |
| 4317 | } |
| 4318 | |
| 4319 | if (socket_only_conditions) { // socket_ip_conditions can be TRUE or FALSE |
| 4320 | socket_layer_non_id_conditions = TRUE; |
| 4321 | ip_output_layer_id_condition = TRUE; |
| 4322 | if (secondary_result) { |
| 4323 | ip_output_layer_tunnel_condition_from_id = TRUE; |
| 4324 | } |
| 4325 | } else if (socket_ip_conditions) { |
| 4326 | socket_layer_non_id_conditions = TRUE; |
| 4327 | ip_output_layer_id_condition = TRUE; |
| 4328 | ip_output_layer_non_id_conditions = TRUE; |
| 4329 | if (secondary_result) { |
| 4330 | ip_output_layer_tunnel_condition_from_id = TRUE; |
| 4331 | ip_output_layer_tunnel_condition_from_non_id = TRUE; |
| 4332 | } |
| 4333 | } |
| 4334 | break; |
| 4335 | } |
| 4336 | case NECP_POLICY_RESULT_USE_NETAGENT: |
| 4337 | case NECP_POLICY_RESULT_NETAGENT_SCOPED: |
| 4338 | case NECP_POLICY_RESULT_REMOVE_NETAGENT: { |
| 4339 | uuid_t netagent_uuid; |
| 4340 | if (necp_policy_get_result_parameter(policy, parameter_buffer: (u_int8_t *)&netagent_uuid, parameter_buffer_length: sizeof(netagent_uuid))) { |
| 4341 | ultimate_result_parameter.netagent_id = necp_create_uuid_service_id_mapping(uuid: netagent_uuid); |
| 4342 | if (ultimate_result_parameter.netagent_id != 0) { |
| 4343 | uuid_copy(dst: policy->applied_result_uuid, src: netagent_uuid); |
| 4344 | socket_layer_non_id_conditions = TRUE; |
| 4345 | } |
| 4346 | } |
| 4347 | break; |
| 4348 | } |
| 4349 | case NECP_POLICY_RESULT_SOCKET_SCOPED: { |
| 4350 | u_int32_t interface_name_length = necp_policy_get_result_parameter_length(policy); |
| 4351 | if (interface_name_length <= IFXNAMSIZ && interface_name_length > 0) { |
| 4352 | char interface_name[IFXNAMSIZ]; |
| 4353 | ifnet_t scope_interface = NULL; |
| 4354 | necp_policy_get_result_parameter(policy, parameter_buffer: (u_int8_t *)interface_name, parameter_buffer_length: interface_name_length); |
| 4355 | interface_name[interface_name_length - 1] = 0; // Make sure the string is NULL terminated |
| 4356 | if (ifnet_find_by_name(ifname: interface_name, interface: &scope_interface) == 0) { |
| 4357 | ultimate_result_parameter.scoped_interface_index = scope_interface->if_index; |
| 4358 | socket_layer_non_id_conditions = TRUE; |
| 4359 | ifnet_release(interface: scope_interface); |
| 4360 | } |
| 4361 | } |
| 4362 | break; |
| 4363 | } |
| 4364 | case NECP_POLICY_RESULT_SCOPED_DIRECT: { |
| 4365 | socket_layer_non_id_conditions = TRUE; |
| 4366 | break; |
| 4367 | } |
| 4368 | case NECP_POLICY_RESULT_ALLOW_UNENTITLED: { |
| 4369 | socket_layer_non_id_conditions = TRUE; |
| 4370 | break; |
| 4371 | } |
| 4372 | case NECP_POLICY_RESULT_ROUTE_RULES: { |
| 4373 | if (policy->route_rules != NULL && policy->route_rules_size > 0) { |
| 4374 | bool has_socket_only_actions = FALSE; |
| 4375 | u_int32_t route_rule_id = necp_create_route_rule(list: &necp_route_rules, route_rules_array: policy->route_rules, route_rules_array_size: policy->route_rules_size, has_socket_only_actions: &has_socket_only_actions); |
| 4376 | if (route_rule_id > 0) { |
| 4377 | policy->applied_route_rules_id = route_rule_id; |
| 4378 | ultimate_result_parameter.route_rule_id = route_rule_id; |
| 4379 | if (socket_only_conditions || has_socket_only_actions) { // socket_ip_conditions can be TRUE or FALSE |
| 4380 | socket_layer_non_id_conditions = TRUE; |
| 4381 | } else if (socket_ip_conditions) { |
| 4382 | socket_layer_non_id_conditions = TRUE; |
| 4383 | ip_output_layer_non_id_conditions = TRUE; |
| 4384 | ip_output_layer_non_id_only = TRUE; // Only apply route rules to packets that didn't go through socket layer |
| 4385 | } |
| 4386 | } |
| 4387 | } |
| 4388 | break; |
| 4389 | } |
| 4390 | default: { |
| 4391 | break; |
| 4392 | } |
| 4393 | } |
| 4394 | |
| 4395 | if (socket_layer_non_id_conditions) { |
| 4396 | necp_kernel_policy_id policy_id = necp_kernel_socket_policy_add(order: policy->order, session_order: session->session_order, session_pid: session->proc_pid, condition_mask: master_condition_mask, condition_negated_mask: master_condition_negated_mask, cond_app_id, cond_real_app_id, cond_custom_entitlement, cond_account_id, cond_domain, cond_domain_filter, cond_url, cond_pid, cond_pidversion: cond_pid_version, cond_uid, cond_real_uid, cond_bound_interface, cond_traffic_class, cond_protocol, cond_local_start: &cond_local_start, cond_local_end: &cond_local_end, cond_local_prefix, cond_remote_start: &cond_remote_start, cond_remote_end: &cond_remote_end, cond_remote_prefix, cond_agent_type: &cond_agent_type, cond_sdk_version: &cond_sdk_version, cond_client_flags, cond_signing_identifier, cond_packet_filter_tags, cond_scheme_port, cond_bound_interface_flags, cond_bound_interface_eflags, cond_bound_interface_xflags, result: ultimate_result, result_parameter: ultimate_result_parameter); |
| 4397 | |
| 4398 | if (policy_id == 0) { |
| 4399 | NECPLOG0(LOG_DEBUG, "Error applying socket kernel policy"); |
| 4400 | goto fail; |
| 4401 | } |
| 4402 | |
| 4403 | cond_ip_output_layer_id = policy_id; |
| 4404 | policy->kernel_socket_policies[0] = policy_id; |
| 4405 | } |
| 4406 | |
| 4407 | if (ip_output_layer_non_id_conditions) { |
| 4408 | u_int64_t condition_mask = master_condition_mask; |
| 4409 | if (ip_output_layer_non_id_only) { |
| 4410 | condition_mask |= NECP_KERNEL_CONDITION_POLICY_ID; |
| 4411 | } |
| 4412 | |
| 4413 | necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(order: policy->order, NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS, session_order: session->session_order, session_pid: session->proc_pid, condition_mask, condition_negated_mask: master_condition_negated_mask, NECP_KERNEL_POLICY_ID_NONE, cond_bound_interface, cond_last_interface_index: 0, cond_protocol, cond_local_start: &cond_local_start, cond_local_end: &cond_local_end, cond_local_prefix, cond_remote_start: &cond_remote_start, cond_remote_end: &cond_remote_end, cond_remote_prefix, cond_packet_filter_tags, cond_scheme_port, cond_bound_interface_flags, cond_bound_interface_eflags, cond_bound_interface_xflags, result: ultimate_result, result_parameter: ultimate_result_parameter); |
| 4414 | |
| 4415 | if (policy_id == 0) { |
| 4416 | NECPLOG0(LOG_DEBUG, "Error applying IP output kernel policy"); |
| 4417 | goto fail; |
| 4418 | } |
| 4419 | |
| 4420 | policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS] = policy_id; |
| 4421 | } |
| 4422 | |
| 4423 | if (ip_output_layer_id_condition) { |
| 4424 | necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(order: policy->order, NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION, session_order: session->session_order, session_pid: session->proc_pid, NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_ALL_INTERFACES, condition_negated_mask: 0, cond_policy_id: cond_ip_output_layer_id, NULL, cond_last_interface_index: 0, cond_protocol: 0, NULL, NULL, cond_local_prefix: 0, NULL, NULL, cond_remote_prefix: 0, cond_packet_filter_tags: 0, cond_scheme_port: 0, cond_bound_interface_flags, cond_bound_interface_eflags, cond_bound_interface_xflags, result: ultimate_result, result_parameter: ultimate_result_parameter); |
| 4425 | |
| 4426 | if (policy_id == 0) { |
| 4427 | NECPLOG0(LOG_DEBUG, "Error applying IP output kernel policy"); |
| 4428 | goto fail; |
| 4429 | } |
| 4430 | |
| 4431 | policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION] = policy_id; |
| 4432 | } |
| 4433 | |
| 4434 | // Extra policies for IP Output tunnels for when packets loop back |
| 4435 | if (ip_output_layer_tunnel_condition_from_id) { |
| 4436 | necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(order: policy->order, NECP_KERNEL_POLICY_SUBORDER_NON_ID_TUNNEL_CONDITION, session_order: session->session_order, session_pid: session->proc_pid, NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_LAST_INTERFACE | NECP_KERNEL_CONDITION_ALL_INTERFACES, condition_negated_mask: 0, cond_policy_id: policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_NON_ID_CONDITIONS], NULL, cond_last_interface_index, cond_protocol: 0, NULL, NULL, cond_local_prefix: 0, NULL, NULL, cond_remote_prefix: 0, cond_packet_filter_tags: 0, cond_scheme_port: 0, cond_bound_interface_flags, cond_bound_interface_eflags, cond_bound_interface_xflags, result: secondary_result, result_parameter: secondary_result_parameter); |
| 4437 | |
| 4438 | if (policy_id == 0) { |
| 4439 | NECPLOG0(LOG_DEBUG, "Error applying IP output kernel policy"); |
| 4440 | goto fail; |
| 4441 | } |
| 4442 | |
| 4443 | policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_NON_ID_TUNNEL_CONDITION] = policy_id; |
| 4444 | } |
| 4445 | |
| 4446 | if (ip_output_layer_tunnel_condition_from_id) { |
| 4447 | necp_kernel_policy_id policy_id = necp_kernel_ip_output_policy_add(order: policy->order, NECP_KERNEL_POLICY_SUBORDER_ID_TUNNEL_CONDITION, session_order: session->session_order, session_pid: session->proc_pid, NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_LAST_INTERFACE | NECP_KERNEL_CONDITION_ALL_INTERFACES, condition_negated_mask: 0, cond_policy_id: policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_ID_CONDITION], NULL, cond_last_interface_index, cond_protocol: 0, NULL, NULL, cond_local_prefix: 0, NULL, NULL, cond_remote_prefix: 0, cond_packet_filter_tags: 0, cond_scheme_port: 0, cond_bound_interface_flags, cond_bound_interface_eflags, cond_bound_interface_xflags, result: secondary_result, result_parameter: secondary_result_parameter); |
| 4448 | |
| 4449 | if (policy_id == 0) { |
| 4450 | NECPLOG0(LOG_DEBUG, "Error applying IP output kernel policy"); |
| 4451 | goto fail; |
| 4452 | } |
| 4453 | |
| 4454 | policy->kernel_ip_output_policies[NECP_KERNEL_POLICY_SUBORDER_ID_TUNNEL_CONDITION] = policy_id; |
| 4455 | } |
| 4456 | |
| 4457 | policy->applied = TRUE; |
| 4458 | policy->pending_update = FALSE; |
| 4459 | return TRUE; |
| 4460 | |
| 4461 | fail: |
| 4462 | return FALSE; |
| 4463 | } |
| 4464 | |
| 4465 | static void |
| 4466 | necp_policy_apply_all(struct necp_session *session) |
| 4467 | { |
| 4468 | struct necp_session_policy *policy = NULL; |
| 4469 | struct necp_session_policy *temp_policy = NULL; |
| 4470 | struct kev_necp_policies_changed_data kev_data; |
| 4471 | kev_data.changed_count = 0; |
| 4472 | |
| 4473 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 4474 | |
| 4475 | // Remove exisiting applied policies |
| 4476 | if (session->dirty) { |
| 4477 | LIST_FOREACH_SAFE(policy, &session->policies, chain, temp_policy) { |
| 4478 | if (policy->pending_deletion) { |
| 4479 | if (policy->applied) { |
| 4480 | necp_policy_unapply(policy); |
| 4481 | } |
| 4482 | // Delete the policy |
| 4483 | necp_policy_delete(session, policy); |
| 4484 | } else if (!policy->applied) { |
| 4485 | necp_policy_apply(session, policy); |
| 4486 | } else if (policy->pending_update) { |
| 4487 | // Must have been applied, but needs an update. Remove and re-add. |
| 4488 | necp_policy_unapply(policy); |
| 4489 | necp_policy_apply(session, policy); |
| 4490 | } |
| 4491 | } |
| 4492 | |
| 4493 | necp_kernel_socket_policies_update_uuid_table(); |
| 4494 | necp_kernel_socket_policies_reprocess(); |
| 4495 | necp_kernel_ip_output_policies_reprocess(); |
| 4496 | |
| 4497 | // Clear dirty bit flags |
| 4498 | session->dirty = FALSE; |
| 4499 | } |
| 4500 | |
| 4501 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 4502 | |
| 4503 | necp_update_all_clients(); |
| 4504 | necp_post_change_event(necp_event_data: &kev_data); |
| 4505 | |
| 4506 | if (necp_debug) { |
| 4507 | NECPLOG0(LOG_DEBUG, "Applied NECP policies"); |
| 4508 | } |
| 4509 | } |
| 4510 | |
| 4511 | // Kernel Policy Management |
| 4512 | // --------------------- |
| 4513 | // Kernel policies are derived from session policies |
| 4514 | static necp_kernel_policy_id |
| 4515 | necp_kernel_policy_get_new_id(bool socket_level) |
| 4516 | { |
| 4517 | static necp_kernel_policy_id necp_last_kernel_socket_policy_id = 0; |
| 4518 | static necp_kernel_policy_id necp_last_kernel_ip_policy_id = 0; |
| 4519 | |
| 4520 | necp_kernel_policy_id newid = NECP_KERNEL_POLICY_ID_NONE; |
| 4521 | |
| 4522 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 4523 | |
| 4524 | if (socket_level) { |
| 4525 | bool wrapped = FALSE; |
| 4526 | do { |
| 4527 | necp_last_kernel_socket_policy_id++; |
| 4528 | if (necp_last_kernel_socket_policy_id < NECP_KERNEL_POLICY_ID_FIRST_VALID_SOCKET || |
| 4529 | necp_last_kernel_socket_policy_id >= NECP_KERNEL_POLICY_ID_FIRST_VALID_IP) { |
| 4530 | if (wrapped) { |
| 4531 | // Already wrapped, give up |
| 4532 | NECPLOG0(LOG_ERR, "Failed to find a free socket kernel policy ID.\n"); |
| 4533 | return NECP_KERNEL_POLICY_ID_NONE; |
| 4534 | } |
| 4535 | necp_last_kernel_socket_policy_id = NECP_KERNEL_POLICY_ID_FIRST_VALID_SOCKET; |
| 4536 | wrapped = TRUE; |
| 4537 | } |
| 4538 | newid = necp_last_kernel_socket_policy_id; |
| 4539 | } while (necp_kernel_socket_policy_find(policy_id: newid) != NULL); // If already used, keep trying |
| 4540 | } else { |
| 4541 | bool wrapped = FALSE; |
| 4542 | do { |
| 4543 | necp_last_kernel_ip_policy_id++; |
| 4544 | if (necp_last_kernel_ip_policy_id < NECP_KERNEL_POLICY_ID_FIRST_VALID_IP) { |
| 4545 | if (wrapped) { |
| 4546 | // Already wrapped, give up |
| 4547 | NECPLOG0(LOG_ERR, "Failed to find a free IP kernel policy ID.\n"); |
| 4548 | return NECP_KERNEL_POLICY_ID_NONE; |
| 4549 | } |
| 4550 | necp_last_kernel_ip_policy_id = NECP_KERNEL_POLICY_ID_FIRST_VALID_IP; |
| 4551 | wrapped = TRUE; |
| 4552 | } |
| 4553 | newid = necp_last_kernel_ip_policy_id; |
| 4554 | } while (necp_kernel_ip_output_policy_find(policy_id: newid) != NULL); // If already used, keep trying |
| 4555 | } |
| 4556 | |
| 4557 | if (newid == NECP_KERNEL_POLICY_ID_NONE) { |
| 4558 | NECPLOG0(LOG_ERR, "Allocate kernel policy id failed.\n"); |
| 4559 | return NECP_KERNEL_POLICY_ID_NONE; |
| 4560 | } |
| 4561 | |
| 4562 | return newid; |
| 4563 | } |
| 4564 | |
| 4565 | #define NECP_KERNEL_VALID_SOCKET_CONDITIONS (NECP_KERNEL_CONDITION_APP_ID | NECP_KERNEL_CONDITION_REAL_APP_ID | NECP_KERNEL_CONDITION_DOMAIN | NECP_KERNEL_CONDITION_ACCOUNT_ID | NECP_KERNEL_CONDITION_PID | NECP_KERNEL_CONDITION_UID | NECP_KERNEL_CONDITION_REAL_UID | NECP_KERNEL_CONDITION_ALL_INTERFACES | NECP_KERNEL_CONDITION_BOUND_INTERFACE | NECP_KERNEL_CONDITION_TRAFFIC_CLASS | NECP_KERNEL_CONDITION_PROTOCOL | NECP_KERNEL_CONDITION_LOCAL_START | NECP_KERNEL_CONDITION_LOCAL_END | NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_REMOTE_START | NECP_KERNEL_CONDITION_REMOTE_END | NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_ENTITLEMENT | NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT | NECP_KERNEL_CONDITION_AGENT_TYPE | NECP_KERNEL_CONDITION_HAS_CLIENT | NECP_KERNEL_CONDITION_LOCAL_NETWORKS | NECP_KERNEL_CONDITION_CLIENT_FLAGS | NECP_KERNEL_CONDITION_LOCAL_EMPTY | NECP_KERNEL_CONDITION_REMOTE_EMPTY | NECP_KERNEL_CONDITION_PLATFORM_BINARY | NECP_KERNEL_CONDITION_SDK_VERSION | NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER | NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS | NECP_KERNEL_CONDITION_IS_LOOPBACK | NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY | NECP_KERNEL_CONDITION_SCHEME_PORT | NECP_KERNEL_CONDITION_DOMAIN_FILTER | NECP_KERNEL_CONDITION_SYSTEM_SIGNED_RESULT | NECP_KERNEL_CONDITION_EXACT_DOMAIN | NECP_KERNEL_CONDITION_URL | NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) |
| 4566 | |
| 4567 | static necp_kernel_policy_id |
| 4568 | necp_kernel_socket_policy_add(necp_policy_order order, u_int32_t session_order, int session_pid, u_int64_t condition_mask, u_int64_t condition_negated_mask, necp_app_id cond_app_id, necp_app_id cond_real_app_id, char *cond_custom_entitlement, u_int32_t cond_account_id, char *cond_domain, u_int32_t cond_domain_filter, char *cond_url, pid_t cond_pid, int32_t cond_pid_version, uid_t cond_uid, uid_t cond_real_uid, ifnet_t cond_bound_interface, struct necp_policy_condition_tc_range cond_traffic_class, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, struct necp_policy_condition_agent_type *cond_agent_type, struct necp_policy_condition_sdk_version *cond_sdk_version, u_int32_t cond_client_flags, char *cond_signing_identifier, u_int16_t cond_packet_filter_tags, u_int16_t cond_scheme_port, u_int32_t cond_bound_interface_flags, u_int32_t cond_bound_interface_eflags, u_int32_t cond_bound_interface_xflags, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter) |
| 4569 | { |
| 4570 | struct necp_kernel_socket_policy *new_kernel_policy = NULL; |
| 4571 | struct necp_kernel_socket_policy *tmp_kernel_policy = NULL; |
| 4572 | |
| 4573 | new_kernel_policy = zalloc_flags(necp_socket_policy_zone, Z_WAITOK | Z_ZERO); |
| 4574 | |
| 4575 | new_kernel_policy->id = necp_kernel_policy_get_new_id(true); |
| 4576 | new_kernel_policy->order = order; |
| 4577 | new_kernel_policy->session_order = session_order; |
| 4578 | new_kernel_policy->session_pid = session_pid; |
| 4579 | |
| 4580 | // Sanitize condition mask |
| 4581 | new_kernel_policy->condition_mask = (condition_mask & NECP_KERNEL_VALID_SOCKET_CONDITIONS); |
| 4582 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE)) { |
| 4583 | new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_BOUND_INTERFACE; |
| 4584 | } |
| 4585 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS)) { |
| 4586 | new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS; |
| 4587 | } |
| 4588 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) && !(new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID)) { |
| 4589 | new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_REAL_APP_ID; |
| 4590 | } |
| 4591 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX)) { |
| 4592 | new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_LOCAL_PREFIX; |
| 4593 | } |
| 4594 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX)) { |
| 4595 | new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_REMOTE_PREFIX; |
| 4596 | } |
| 4597 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) { |
| 4598 | new_kernel_policy->condition_mask &= ~(NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_LOCAL_END); |
| 4599 | } |
| 4600 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY)) { |
| 4601 | new_kernel_policy->condition_mask &= ~(NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_REMOTE_END); |
| 4602 | } |
| 4603 | new_kernel_policy->condition_negated_mask = condition_negated_mask & new_kernel_policy->condition_mask; |
| 4604 | |
| 4605 | // Set condition values |
| 4606 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID) { |
| 4607 | new_kernel_policy->cond_app_id = cond_app_id; |
| 4608 | } |
| 4609 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) { |
| 4610 | new_kernel_policy->cond_real_app_id = cond_real_app_id; |
| 4611 | } |
| 4612 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT) { |
| 4613 | new_kernel_policy->cond_custom_entitlement = cond_custom_entitlement; |
| 4614 | } |
| 4615 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID) { |
| 4616 | new_kernel_policy->cond_account_id = cond_account_id; |
| 4617 | } |
| 4618 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_DOMAIN) || |
| 4619 | (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_EXACT_DOMAIN)) { |
| 4620 | new_kernel_policy->cond_domain = cond_domain; |
| 4621 | new_kernel_policy->cond_domain_dot_count = necp_count_dots(string: cond_domain, length: strlen(s: cond_domain)); |
| 4622 | } |
| 4623 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_DOMAIN_FILTER) { |
| 4624 | new_kernel_policy->cond_domain_filter = cond_domain_filter; |
| 4625 | } |
| 4626 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_URL) { |
| 4627 | new_kernel_policy->cond_url = cond_url; |
| 4628 | } |
| 4629 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PID) { |
| 4630 | new_kernel_policy->cond_pid = cond_pid; |
| 4631 | new_kernel_policy->cond_pid_version = cond_pid_version; |
| 4632 | } |
| 4633 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_UID) { |
| 4634 | new_kernel_policy->cond_uid = cond_uid; |
| 4635 | } |
| 4636 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_UID) { |
| 4637 | new_kernel_policy->cond_real_uid = cond_real_uid; |
| 4638 | } |
| 4639 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) { |
| 4640 | if (cond_bound_interface) { |
| 4641 | ifnet_reference(interface: cond_bound_interface); |
| 4642 | } |
| 4643 | new_kernel_policy->cond_bound_interface = cond_bound_interface; |
| 4644 | } |
| 4645 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) { |
| 4646 | new_kernel_policy->cond_traffic_class = cond_traffic_class; |
| 4647 | } |
| 4648 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) { |
| 4649 | new_kernel_policy->cond_protocol = cond_protocol; |
| 4650 | } |
| 4651 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) { |
| 4652 | memcpy(dst: &new_kernel_policy->cond_local_start, src: cond_local_start, n: cond_local_start->sa.sa_len); |
| 4653 | } |
| 4654 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 4655 | memcpy(dst: &new_kernel_policy->cond_local_end, src: cond_local_end, n: cond_local_end->sa.sa_len); |
| 4656 | } |
| 4657 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) { |
| 4658 | new_kernel_policy->cond_local_prefix = cond_local_prefix; |
| 4659 | } |
| 4660 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) { |
| 4661 | memcpy(dst: &new_kernel_policy->cond_remote_start, src: cond_remote_start, n: cond_remote_start->sa.sa_len); |
| 4662 | } |
| 4663 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 4664 | memcpy(dst: &new_kernel_policy->cond_remote_end, src: cond_remote_end, n: cond_remote_end->sa.sa_len); |
| 4665 | } |
| 4666 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) { |
| 4667 | new_kernel_policy->cond_remote_prefix = cond_remote_prefix; |
| 4668 | } |
| 4669 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE) { |
| 4670 | memcpy(dst: &new_kernel_policy->cond_agent_type, src: cond_agent_type, n: sizeof(*cond_agent_type)); |
| 4671 | } |
| 4672 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION) { |
| 4673 | memcpy(dst: &new_kernel_policy->cond_sdk_version, src: cond_sdk_version, n: sizeof(*cond_sdk_version)); |
| 4674 | } |
| 4675 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) { |
| 4676 | new_kernel_policy->cond_client_flags = cond_client_flags; |
| 4677 | } |
| 4678 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) { |
| 4679 | new_kernel_policy->cond_signing_identifier = cond_signing_identifier; |
| 4680 | } |
| 4681 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) { |
| 4682 | new_kernel_policy->cond_packet_filter_tags = cond_packet_filter_tags; |
| 4683 | } |
| 4684 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SCHEME_PORT) { |
| 4685 | new_kernel_policy->cond_scheme_port = cond_scheme_port; |
| 4686 | } |
| 4687 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) { |
| 4688 | new_kernel_policy->cond_bound_interface_flags = cond_bound_interface_flags; |
| 4689 | new_kernel_policy->cond_bound_interface_eflags = cond_bound_interface_eflags; |
| 4690 | new_kernel_policy->cond_bound_interface_xflags = cond_bound_interface_xflags; |
| 4691 | } |
| 4692 | |
| 4693 | new_kernel_policy->result = result; |
| 4694 | memcpy(dst: &new_kernel_policy->result_parameter, src: &result_parameter, n: sizeof(result_parameter)); |
| 4695 | |
| 4696 | if (necp_debug) { |
| 4697 | NECPLOG(LOG_DEBUG, "Added kernel policy: socket, id=%d, mask=%llx\n", new_kernel_policy->id, new_kernel_policy->condition_mask); |
| 4698 | } |
| 4699 | LIST_INSERT_SORTED_TWICE_ASCENDING(&necp_kernel_socket_policies, new_kernel_policy, chain, session_order, order, tmp_kernel_policy); |
| 4700 | |
| 4701 | return new_kernel_policy ? new_kernel_policy->id : 0; |
| 4702 | } |
| 4703 | |
| 4704 | static struct necp_kernel_socket_policy * |
| 4705 | necp_kernel_socket_policy_find(necp_kernel_policy_id policy_id) |
| 4706 | { |
| 4707 | struct necp_kernel_socket_policy *kernel_policy = NULL; |
| 4708 | struct necp_kernel_socket_policy *tmp_kernel_policy = NULL; |
| 4709 | |
| 4710 | if (policy_id == 0) { |
| 4711 | return NULL; |
| 4712 | } |
| 4713 | |
| 4714 | LIST_FOREACH_SAFE(kernel_policy, &necp_kernel_socket_policies, chain, tmp_kernel_policy) { |
| 4715 | if (kernel_policy->id == policy_id) { |
| 4716 | return kernel_policy; |
| 4717 | } |
| 4718 | } |
| 4719 | |
| 4720 | return NULL; |
| 4721 | } |
| 4722 | |
| 4723 | static bool |
| 4724 | necp_kernel_socket_policy_delete(necp_kernel_policy_id policy_id) |
| 4725 | { |
| 4726 | struct necp_kernel_socket_policy *policy = NULL; |
| 4727 | |
| 4728 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 4729 | |
| 4730 | policy = necp_kernel_socket_policy_find(policy_id); |
| 4731 | if (policy) { |
| 4732 | LIST_REMOVE(policy, chain); |
| 4733 | |
| 4734 | if (policy->cond_bound_interface) { |
| 4735 | ifnet_release(interface: policy->cond_bound_interface); |
| 4736 | policy->cond_bound_interface = NULL; |
| 4737 | } |
| 4738 | |
| 4739 | if (policy->cond_domain) { |
| 4740 | kfree_data_addr(policy->cond_domain); |
| 4741 | policy->cond_domain = NULL; |
| 4742 | } |
| 4743 | |
| 4744 | if (policy->cond_url) { |
| 4745 | kfree_data_addr(policy->cond_url); |
| 4746 | policy->cond_url = NULL; |
| 4747 | } |
| 4748 | |
| 4749 | if (policy->cond_custom_entitlement) { |
| 4750 | kfree_data_addr(policy->cond_custom_entitlement); |
| 4751 | policy->cond_custom_entitlement = NULL; |
| 4752 | } |
| 4753 | |
| 4754 | if (policy->cond_signing_identifier) { |
| 4755 | kfree_data_addr(policy->cond_signing_identifier); |
| 4756 | policy->cond_signing_identifier = NULL; |
| 4757 | } |
| 4758 | |
| 4759 | zfree(necp_socket_policy_zone, policy); |
| 4760 | return TRUE; |
| 4761 | } |
| 4762 | |
| 4763 | return FALSE; |
| 4764 | } |
| 4765 | |
| 4766 | static inline const char * |
| 4767 | necp_get_result_description(char *result_string, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter) |
| 4768 | { |
| 4769 | uuid_string_t uuid_string; |
| 4770 | switch (result) { |
| 4771 | case NECP_KERNEL_POLICY_RESULT_NONE: { |
| 4772 | snprintf(result_string, MAX_RESULT_STRING_LEN, "None"); |
| 4773 | break; |
| 4774 | } |
| 4775 | case NECP_KERNEL_POLICY_RESULT_PASS: { |
| 4776 | snprintf(result_string, MAX_RESULT_STRING_LEN, "Pass (%X)", result_parameter.pass_flags); |
| 4777 | break; |
| 4778 | } |
| 4779 | case NECP_KERNEL_POLICY_RESULT_SKIP: { |
| 4780 | snprintf(result_string, MAX_RESULT_STRING_LEN, "Skip (%u)", result_parameter.skip_policy_order); |
| 4781 | break; |
| 4782 | } |
| 4783 | case NECP_KERNEL_POLICY_RESULT_DROP: { |
| 4784 | snprintf(result_string, MAX_RESULT_STRING_LEN, "Drop (%X)", result_parameter.drop_flags); |
| 4785 | break; |
| 4786 | } |
| 4787 | case NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT: { |
| 4788 | snprintf(result_string, MAX_RESULT_STRING_LEN, "SocketDivert (%d)", result_parameter.flow_divert_control_unit); |
| 4789 | break; |
| 4790 | } |
| 4791 | case NECP_KERNEL_POLICY_RESULT_SOCKET_FILTER: { |
| 4792 | snprintf(result_string, MAX_RESULT_STRING_LEN, "SocketFilter (%d)", result_parameter.filter_control_unit); |
| 4793 | break; |
| 4794 | } |
| 4795 | case NECP_KERNEL_POLICY_RESULT_IP_TUNNEL: { |
| 4796 | ifnet_t interface = ifindex2ifnet[result_parameter.tunnel_interface_index]; |
| 4797 | snprintf(result_string, MAX_RESULT_STRING_LEN, "IPTunnel (%s%d)", ifnet_name(interface), ifnet_unit(interface)); |
| 4798 | break; |
| 4799 | } |
| 4800 | case NECP_KERNEL_POLICY_RESULT_IP_FILTER: { |
| 4801 | snprintf(result_string, MAX_RESULT_STRING_LEN, "IPFilter"); |
| 4802 | break; |
| 4803 | } |
| 4804 | case NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED: { |
| 4805 | ifnet_t interface = ifindex2ifnet[result_parameter.scoped_interface_index]; |
| 4806 | snprintf(result_string, MAX_RESULT_STRING_LEN, "SocketScoped (%s%d)", ifnet_name(interface), ifnet_unit(interface)); |
| 4807 | break; |
| 4808 | } |
| 4809 | case NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT: { |
| 4810 | snprintf(result_string, MAX_RESULT_STRING_LEN, "ScopedDirect"); |
| 4811 | break; |
| 4812 | } |
| 4813 | case NECP_KERNEL_POLICY_RESULT_ALLOW_UNENTITLED: { |
| 4814 | snprintf(result_string, MAX_RESULT_STRING_LEN, "AllowUnentitled"); |
| 4815 | break; |
| 4816 | } |
| 4817 | case NECP_KERNEL_POLICY_RESULT_ROUTE_RULES: { |
| 4818 | int index = 0; |
| 4819 | char interface_names[MAX_ROUTE_RULE_INTERFACES][IFXNAMSIZ]; |
| 4820 | struct necp_route_rule *route_rule = necp_lookup_route_rule_locked(list: &necp_route_rules, route_rule_id: result_parameter.route_rule_id); |
| 4821 | if (route_rule != NULL) { |
| 4822 | for (index = 0; index < MAX_ROUTE_RULE_INTERFACES; index++) { |
| 4823 | if (route_rule->exception_if_indices[index] != 0) { |
| 4824 | ifnet_t interface = ifindex2ifnet[route_rule->exception_if_indices[index]]; |
| 4825 | snprintf(interface_names[index], IFXNAMSIZ, "%s%d", ifnet_name(interface), ifnet_unit(interface)); |
| 4826 | } else { |
| 4827 | memset(s: interface_names[index], c: 0, IFXNAMSIZ); |
| 4828 | } |
| 4829 | } |
| 4830 | switch (route_rule->default_action) { |
| 4831 | case NECP_ROUTE_RULE_DENY_INTERFACE: |
| 4832 | case NECP_ROUTE_RULE_DENY_INTERFACE_WITH_TYPE: |
| 4833 | snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (Only %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s)", |
| 4834 | (route_rule->cellular_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Cell ": "", |
| 4835 | (route_rule->wifi_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "WiFi ": "", |
| 4836 | (route_rule->wired_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Wired ": "", |
| 4837 | (route_rule->expensive_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Exp ": "", |
| 4838 | (route_rule->constrained_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Constrained ": "", |
| 4839 | (route_rule->companion_action == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? "Companion ": "", |
| 4840 | (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[0] : "", |
| 4841 | (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " ": "", |
| 4842 | (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[1] : "", |
| 4843 | (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " ": "", |
| 4844 | (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[2] : "", |
| 4845 | (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " ": "", |
| 4846 | (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[3] : "", |
| 4847 | (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " ": "", |
| 4848 | (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[4] : "", |
| 4849 | (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " ": "", |
| 4850 | (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[5] : "", |
| 4851 | (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " ": "", |
| 4852 | (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[6] : "", |
| 4853 | (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " ": "", |
| 4854 | (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[7] : "", |
| 4855 | (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " ": "", |
| 4856 | (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[8] : "", |
| 4857 | (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? " ": "", |
| 4858 | (route_rule->exception_if_actions[9] == NECP_ROUTE_RULE_ALLOW_INTERFACE) ? interface_names[9] : ""); |
| 4859 | break; |
| 4860 | case NECP_ROUTE_RULE_ALLOW_INTERFACE: |
| 4861 | snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s)", |
| 4862 | IS_NECP_ROUTE_RULE_DENY(route_rule->cellular_action) ? "!Cell ": "", |
| 4863 | IS_NECP_ROUTE_RULE_DENY(route_rule->wifi_action) ? "!WiFi ": "", |
| 4864 | IS_NECP_ROUTE_RULE_DENY(route_rule->wired_action) ? "!Wired ": "", |
| 4865 | IS_NECP_ROUTE_RULE_DENY(route_rule->expensive_action) ? "!Exp ": "", |
| 4866 | IS_NECP_ROUTE_RULE_DENY(route_rule->constrained_action) ? "!Constrained ": "", |
| 4867 | IS_NECP_ROUTE_RULE_DENY(route_rule->companion_action) ? "!Companion ": "", |
| 4868 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[0]) ? "!": "", |
| 4869 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[0]) ? interface_names[0] : "", |
| 4870 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[1]) ? "!": "", |
| 4871 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[1]) ? interface_names[1] : "", |
| 4872 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[2]) ? "!": "", |
| 4873 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[2]) ? interface_names[2] : "", |
| 4874 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[3]) ? "!": "", |
| 4875 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[3]) ? interface_names[3] : "", |
| 4876 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[4]) ? "!": "", |
| 4877 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[4]) ? interface_names[4] : "", |
| 4878 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[5]) ? "!": "", |
| 4879 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[5]) ? interface_names[5] : "", |
| 4880 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[6]) ? "!": "", |
| 4881 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[6]) ? interface_names[6] : "", |
| 4882 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[7]) ? "!": "", |
| 4883 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[7]) ? interface_names[7] : "", |
| 4884 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[8]) ? "!": "", |
| 4885 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[8]) ? interface_names[8] : "", |
| 4886 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[9]) ? "!": "", |
| 4887 | IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[9]) ? interface_names[9] : ""); |
| 4888 | break; |
| 4889 | case NECP_ROUTE_RULE_QOS_MARKING: |
| 4890 | snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (QoSMarking %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s)", |
| 4891 | (route_rule->cellular_action == NECP_ROUTE_RULE_QOS_MARKING) ? "Cell ": "", |
| 4892 | (route_rule->wifi_action == NECP_ROUTE_RULE_QOS_MARKING) ? "WiFi ": "", |
| 4893 | (route_rule->wired_action == NECP_ROUTE_RULE_QOS_MARKING) ? "Wired ": "", |
| 4894 | (route_rule->expensive_action == NECP_ROUTE_RULE_QOS_MARKING) ? "Exp ": "", |
| 4895 | (route_rule->constrained_action == NECP_ROUTE_RULE_QOS_MARKING) ? "Constrained ": "", |
| 4896 | (route_rule->companion_action == NECP_ROUTE_RULE_QOS_MARKING) ? "Companion ": "", |
| 4897 | (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[0] : "", |
| 4898 | (route_rule->exception_if_actions[0] == NECP_ROUTE_RULE_QOS_MARKING) ? " ": "", |
| 4899 | (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[1] : "", |
| 4900 | (route_rule->exception_if_actions[1] == NECP_ROUTE_RULE_QOS_MARKING) ? " ": "", |
| 4901 | (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[2] : "", |
| 4902 | (route_rule->exception_if_actions[2] == NECP_ROUTE_RULE_QOS_MARKING) ? " ": "", |
| 4903 | (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[3] : "", |
| 4904 | (route_rule->exception_if_actions[3] == NECP_ROUTE_RULE_QOS_MARKING) ? " ": "", |
| 4905 | (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[4] : "", |
| 4906 | (route_rule->exception_if_actions[4] == NECP_ROUTE_RULE_QOS_MARKING) ? " ": "", |
| 4907 | (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[5] : "", |
| 4908 | (route_rule->exception_if_actions[5] == NECP_ROUTE_RULE_QOS_MARKING) ? " ": "", |
| 4909 | (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[6] : "", |
| 4910 | (route_rule->exception_if_actions[6] == NECP_ROUTE_RULE_QOS_MARKING) ? " ": "", |
| 4911 | (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[7] : "", |
| 4912 | (route_rule->exception_if_actions[7] == NECP_ROUTE_RULE_QOS_MARKING) ? " ": "", |
| 4913 | (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[8] : "", |
| 4914 | (route_rule->exception_if_actions[8] == NECP_ROUTE_RULE_QOS_MARKING) ? " ": "", |
| 4915 | (route_rule->exception_if_actions[9] == NECP_ROUTE_RULE_QOS_MARKING) ? interface_names[9] : ""); |
| 4916 | break; |
| 4917 | default: |
| 4918 | snprintf(result_string, MAX_RESULT_STRING_LEN, "RouteRules (Unknown)"); |
| 4919 | break; |
| 4920 | } |
| 4921 | } |
| 4922 | break; |
| 4923 | } |
| 4924 | case NECP_KERNEL_POLICY_RESULT_USE_NETAGENT: { |
| 4925 | bool found_mapping = FALSE; |
| 4926 | struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: result_parameter.netagent_id); |
| 4927 | if (mapping != NULL) { |
| 4928 | uuid_unparse(uu: mapping->uuid, out: uuid_string); |
| 4929 | found_mapping = TRUE; |
| 4930 | } |
| 4931 | snprintf(result_string, MAX_RESULT_STRING_LEN, "UseNetAgent (%s)", found_mapping ? uuid_string : "Unknown"); |
| 4932 | break; |
| 4933 | } |
| 4934 | case NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED: { |
| 4935 | bool found_mapping = FALSE; |
| 4936 | struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: result_parameter.netagent_id); |
| 4937 | if (mapping != NULL) { |
| 4938 | uuid_unparse(uu: mapping->uuid, out: uuid_string); |
| 4939 | found_mapping = TRUE; |
| 4940 | } |
| 4941 | snprintf(result_string, MAX_RESULT_STRING_LEN, "NetAgentScoped (%s)", found_mapping ? uuid_string : "Unknown"); |
| 4942 | break; |
| 4943 | } |
| 4944 | case NECP_KERNEL_POLICY_RESULT_REMOVE_NETAGENT: { |
| 4945 | bool found_mapping = FALSE; |
| 4946 | struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: result_parameter.netagent_id); |
| 4947 | if (mapping != NULL) { |
| 4948 | uuid_unparse(uu: mapping->uuid, out: uuid_string); |
| 4949 | found_mapping = TRUE; |
| 4950 | } |
| 4951 | snprintf(result_string, MAX_RESULT_STRING_LEN, "RemoveNetAgent (%s)", found_mapping ? uuid_string : "Unknown"); |
| 4952 | break; |
| 4953 | } |
| 4954 | default: { |
| 4955 | snprintf(result_string, MAX_RESULT_STRING_LEN, "Unknown %d (%d)", result, result_parameter.tunnel_interface_index); |
| 4956 | break; |
| 4957 | } |
| 4958 | } |
| 4959 | return result_string; |
| 4960 | } |
| 4961 | |
| 4962 | static void |
| 4963 | necp_kernel_socket_policies_dump_all(void) |
| 4964 | { |
| 4965 | if (necp_debug) { |
| 4966 | struct necp_kernel_socket_policy *policy = NULL; |
| 4967 | int policy_i; |
| 4968 | int app_i; |
| 4969 | char result_string[MAX_RESULT_STRING_LEN]; |
| 4970 | char proc_name_string[MAXCOMLEN + 1]; |
| 4971 | memset(s: result_string, c: 0, MAX_RESULT_STRING_LEN); |
| 4972 | memset(s: proc_name_string, c: 0, MAXCOMLEN + 1); |
| 4973 | |
| 4974 | NECPLOG0(LOG_DEBUG, "NECP Application Policies:\n"); |
| 4975 | NECPLOG0(LOG_DEBUG, "-----------\n"); |
| 4976 | for (policy_i = 0; necp_kernel_socket_policies_app_layer_map != NULL && necp_kernel_socket_policies_app_layer_map[policy_i] != NULL; policy_i++) { |
| 4977 | policy = necp_kernel_socket_policies_app_layer_map[policy_i]; |
| 4978 | proc_name(pid: policy->session_pid, buf: proc_name_string, MAXCOMLEN); |
| 4979 | NECPLOG(LOG_DEBUG, "\t%3d. Policy ID: %5d\tProcess: %10.10s\tOrder: %04d.%04d\tMask: %llx\tResult: %s\n", policy_i, policy->id, proc_name_string, policy->session_order, policy->order, policy->condition_mask, necp_get_result_description(result_string, policy->result, policy->result_parameter)); |
| 4980 | } |
| 4981 | if (necp_kernel_socket_policies_app_layer_map[0] != NULL) { |
| 4982 | NECPLOG0(LOG_DEBUG, "-----------\n"); |
| 4983 | } |
| 4984 | |
| 4985 | NECPLOG0(LOG_DEBUG, "NECP Socket Policies:\n"); |
| 4986 | NECPLOG0(LOG_DEBUG, "-----------\n"); |
| 4987 | for (app_i = 0; app_i < NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS; app_i++) { |
| 4988 | NECPLOG(LOG_DEBUG, "\tApp Bucket: %d\n", app_i); |
| 4989 | for (policy_i = 0; necp_kernel_socket_policies_map[app_i] != NULL && (necp_kernel_socket_policies_map[app_i])[policy_i] != NULL; policy_i++) { |
| 4990 | policy = (necp_kernel_socket_policies_map[app_i])[policy_i]; |
| 4991 | proc_name(pid: policy->session_pid, buf: proc_name_string, MAXCOMLEN); |
| 4992 | NECPLOG(LOG_DEBUG, "\t%3d. Policy ID: %5d\tProcess: %10.10s\tOrder: %04d.%04d\tMask: %llx\tResult: %s\n", policy_i, policy->id, proc_name_string, policy->session_order, policy->order, policy->condition_mask, necp_get_result_description(result_string, policy->result, policy->result_parameter)); |
| 4993 | } |
| 4994 | NECPLOG0(LOG_DEBUG, "-----------\n"); |
| 4995 | } |
| 4996 | } |
| 4997 | } |
| 4998 | |
| 4999 | static inline bool |
| 5000 | necp_kernel_socket_policy_results_overlap(struct necp_kernel_socket_policy *upper_policy, struct necp_kernel_socket_policy *lower_policy) |
| 5001 | { |
| 5002 | if (upper_policy->result == NECP_KERNEL_POLICY_RESULT_DROP) { |
| 5003 | // Drop always cancels out lower policies |
| 5004 | return TRUE; |
| 5005 | } else if (upper_policy->result == NECP_KERNEL_POLICY_RESULT_SOCKET_FILTER || |
| 5006 | upper_policy->result == NECP_KERNEL_POLICY_RESULT_ROUTE_RULES || |
| 5007 | upper_policy->result == NECP_KERNEL_POLICY_RESULT_USE_NETAGENT || |
| 5008 | upper_policy->result == NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED || |
| 5009 | upper_policy->result == NECP_KERNEL_POLICY_RESULT_ALLOW_UNENTITLED || |
| 5010 | upper_policy->result == NECP_KERNEL_POLICY_RESULT_REMOVE_NETAGENT) { |
| 5011 | // Filters and route rules never cancel out lower policies |
| 5012 | return FALSE; |
| 5013 | } else if (upper_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 5014 | if (upper_policy->session_order != lower_policy->session_order) { |
| 5015 | // A skip cannot override a policy of a different session |
| 5016 | return FALSE; |
| 5017 | } else { |
| 5018 | if (upper_policy->result_parameter.skip_policy_order == 0 || |
| 5019 | lower_policy->order >= upper_policy->result_parameter.skip_policy_order) { |
| 5020 | // This policy is beyond the skip |
| 5021 | return FALSE; |
| 5022 | } else { |
| 5023 | // This policy is inside the skip |
| 5024 | return TRUE; |
| 5025 | } |
| 5026 | } |
| 5027 | } |
| 5028 | |
| 5029 | // A hard pass, flow divert, tunnel, or scope will currently block out lower policies |
| 5030 | return TRUE; |
| 5031 | } |
| 5032 | |
| 5033 | static bool |
| 5034 | necp_kernel_socket_policy_is_unnecessary(struct necp_kernel_socket_policy *policy, struct necp_kernel_socket_policy **policy_array, int valid_indices) |
| 5035 | { |
| 5036 | bool can_skip = FALSE; |
| 5037 | u_int32_t highest_skip_session_order = 0; |
| 5038 | u_int32_t highest_skip_order = 0; |
| 5039 | int i; |
| 5040 | for (i = 0; i < valid_indices; i++) { |
| 5041 | struct necp_kernel_socket_policy *compared_policy = policy_array[i]; |
| 5042 | |
| 5043 | // For policies in a skip window, we can't mark conflicting policies as unnecessary |
| 5044 | if (can_skip) { |
| 5045 | if (highest_skip_session_order != compared_policy->session_order || |
| 5046 | (highest_skip_order != 0 && compared_policy->order >= highest_skip_order)) { |
| 5047 | // If we've moved on to the next session, or passed the skip window |
| 5048 | highest_skip_session_order = 0; |
| 5049 | highest_skip_order = 0; |
| 5050 | can_skip = FALSE; |
| 5051 | } else { |
| 5052 | // If this policy is also a skip, in can increase the skip window |
| 5053 | if (compared_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 5054 | if (compared_policy->result_parameter.skip_policy_order > highest_skip_order) { |
| 5055 | highest_skip_order = compared_policy->result_parameter.skip_policy_order; |
| 5056 | } |
| 5057 | } |
| 5058 | continue; |
| 5059 | } |
| 5060 | } |
| 5061 | |
| 5062 | if (compared_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 5063 | // This policy is a skip. Set the skip window accordingly |
| 5064 | can_skip = TRUE; |
| 5065 | highest_skip_session_order = compared_policy->session_order; |
| 5066 | highest_skip_order = compared_policy->result_parameter.skip_policy_order; |
| 5067 | } |
| 5068 | |
| 5069 | // The result of the compared policy must be able to block out this policy result |
| 5070 | if (!necp_kernel_socket_policy_results_overlap(upper_policy: compared_policy, lower_policy: policy)) { |
| 5071 | continue; |
| 5072 | } |
| 5073 | |
| 5074 | // If new policy matches All Interfaces, compared policy must also |
| 5075 | if ((policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) && !(compared_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES)) { |
| 5076 | continue; |
| 5077 | } |
| 5078 | |
| 5079 | // If new policy matches Local Networks, compared policy must also |
| 5080 | if ((policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) && !(compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS)) { |
| 5081 | continue; |
| 5082 | } |
| 5083 | |
| 5084 | // Default makes lower policies unecessary always |
| 5085 | if (compared_policy->condition_mask == 0) { |
| 5086 | return TRUE; |
| 5087 | } |
| 5088 | |
| 5089 | // Compared must be more general than policy, and include only conditions within policy |
| 5090 | if ((policy->condition_mask & compared_policy->condition_mask) != compared_policy->condition_mask) { |
| 5091 | continue; |
| 5092 | } |
| 5093 | |
| 5094 | // Negative conditions must match for the overlapping conditions |
| 5095 | if ((policy->condition_negated_mask & compared_policy->condition_mask) != (compared_policy->condition_negated_mask & compared_policy->condition_mask)) { |
| 5096 | continue; |
| 5097 | } |
| 5098 | |
| 5099 | if ((compared_policy->condition_mask & NECP_KERNEL_CONDITION_DOMAIN || |
| 5100 | compared_policy->condition_mask & NECP_KERNEL_CONDITION_EXACT_DOMAIN) && |
| 5101 | strcmp(s1: compared_policy->cond_domain, s2: policy->cond_domain) != 0) { |
| 5102 | continue; |
| 5103 | } |
| 5104 | |
| 5105 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_DOMAIN_FILTER && |
| 5106 | compared_policy->cond_domain_filter != policy->cond_domain_filter) { |
| 5107 | continue; |
| 5108 | } |
| 5109 | |
| 5110 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_URL && |
| 5111 | strcmp(s1: compared_policy->cond_url, s2: policy->cond_url) != 0) { |
| 5112 | continue; |
| 5113 | } |
| 5114 | |
| 5115 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT && |
| 5116 | strcmp(s1: compared_policy->cond_custom_entitlement, s2: policy->cond_custom_entitlement) != 0) { |
| 5117 | continue; |
| 5118 | } |
| 5119 | |
| 5120 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID && |
| 5121 | compared_policy->cond_account_id != policy->cond_account_id) { |
| 5122 | continue; |
| 5123 | } |
| 5124 | |
| 5125 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID && |
| 5126 | compared_policy->cond_policy_id != policy->cond_policy_id) { |
| 5127 | continue; |
| 5128 | } |
| 5129 | |
| 5130 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID && |
| 5131 | compared_policy->cond_app_id != policy->cond_app_id) { |
| 5132 | continue; |
| 5133 | } |
| 5134 | |
| 5135 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID && |
| 5136 | compared_policy->cond_real_app_id != policy->cond_real_app_id) { |
| 5137 | continue; |
| 5138 | } |
| 5139 | |
| 5140 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_PID && |
| 5141 | (compared_policy->cond_pid != policy->cond_pid || compared_policy->cond_pid_version != policy->cond_pid_version)) { |
| 5142 | continue; |
| 5143 | } |
| 5144 | |
| 5145 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_UID && |
| 5146 | compared_policy->cond_uid != policy->cond_uid) { |
| 5147 | continue; |
| 5148 | } |
| 5149 | |
| 5150 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_UID && |
| 5151 | compared_policy->cond_real_uid != policy->cond_real_uid) { |
| 5152 | continue; |
| 5153 | } |
| 5154 | |
| 5155 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE && |
| 5156 | compared_policy->cond_bound_interface != policy->cond_bound_interface) { |
| 5157 | continue; |
| 5158 | } |
| 5159 | |
| 5160 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_PROTOCOL && |
| 5161 | compared_policy->cond_protocol != policy->cond_protocol) { |
| 5162 | continue; |
| 5163 | } |
| 5164 | |
| 5165 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS && |
| 5166 | compared_policy->cond_client_flags != policy->cond_client_flags) { |
| 5167 | continue; |
| 5168 | } |
| 5169 | |
| 5170 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS && |
| 5171 | !(compared_policy->cond_traffic_class.start_tc <= policy->cond_traffic_class.start_tc && |
| 5172 | compared_policy->cond_traffic_class.end_tc >= policy->cond_traffic_class.end_tc)) { |
| 5173 | continue; |
| 5174 | } |
| 5175 | |
| 5176 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) { |
| 5177 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 5178 | if (!necp_is_range_in_range(inner_range_start: (struct sockaddr *)&policy->cond_local_start, inner_range_end: (struct sockaddr *)&policy->cond_local_end, range_start: (struct sockaddr *)&compared_policy->cond_local_start, range_end: (struct sockaddr *)&compared_policy->cond_local_end)) { |
| 5179 | continue; |
| 5180 | } |
| 5181 | } else if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) { |
| 5182 | if (compared_policy->cond_local_prefix > policy->cond_local_prefix || |
| 5183 | !necp_is_addr_in_subnet(addr: (struct sockaddr *)&policy->cond_local_start, subnet_addr: (struct sockaddr *)&compared_policy->cond_local_start, subnet_prefix: compared_policy->cond_local_prefix)) { |
| 5184 | continue; |
| 5185 | } |
| 5186 | } |
| 5187 | } |
| 5188 | |
| 5189 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) { |
| 5190 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 5191 | if (!necp_is_range_in_range(inner_range_start: (struct sockaddr *)&policy->cond_remote_start, inner_range_end: (struct sockaddr *)&policy->cond_remote_end, range_start: (struct sockaddr *)&compared_policy->cond_remote_start, range_end: (struct sockaddr *)&compared_policy->cond_remote_end)) { |
| 5192 | continue; |
| 5193 | } |
| 5194 | } else if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) { |
| 5195 | if (compared_policy->cond_remote_prefix > policy->cond_remote_prefix || |
| 5196 | !necp_is_addr_in_subnet(addr: (struct sockaddr *)&policy->cond_remote_start, subnet_addr: (struct sockaddr *)&compared_policy->cond_remote_start, subnet_prefix: compared_policy->cond_remote_prefix)) { |
| 5197 | continue; |
| 5198 | } |
| 5199 | } |
| 5200 | } |
| 5201 | |
| 5202 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE && |
| 5203 | memcmp(s1: &compared_policy->cond_agent_type, s2: &policy->cond_agent_type, n: sizeof(policy->cond_agent_type)) == 0) { |
| 5204 | continue; |
| 5205 | } |
| 5206 | |
| 5207 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION && |
| 5208 | memcmp(s1: &compared_policy->cond_sdk_version, s2: &policy->cond_sdk_version, n: sizeof(policy->cond_sdk_version)) == 0) { |
| 5209 | continue; |
| 5210 | } |
| 5211 | |
| 5212 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS && |
| 5213 | memcmp(s1: &compared_policy->cond_packet_filter_tags, s2: &policy->cond_packet_filter_tags, n: sizeof(policy->cond_packet_filter_tags)) == 0) { |
| 5214 | continue; |
| 5215 | } |
| 5216 | |
| 5217 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_SCHEME_PORT && |
| 5218 | memcmp(s1: &compared_policy->cond_scheme_port, s2: &policy->cond_scheme_port, n: sizeof(policy->cond_scheme_port)) == 0) { |
| 5219 | continue; |
| 5220 | } |
| 5221 | |
| 5222 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS && |
| 5223 | (compared_policy->cond_bound_interface_flags != policy->cond_bound_interface_flags || |
| 5224 | compared_policy->cond_bound_interface_eflags != policy->cond_bound_interface_eflags || |
| 5225 | compared_policy->cond_bound_interface_xflags != policy->cond_bound_interface_xflags)) { |
| 5226 | continue; |
| 5227 | } |
| 5228 | |
| 5229 | return TRUE; |
| 5230 | } |
| 5231 | |
| 5232 | return FALSE; |
| 5233 | } |
| 5234 | |
| 5235 | static bool |
| 5236 | necp_kernel_socket_policies_reprocess(void) |
| 5237 | { |
| 5238 | int app_i; |
| 5239 | int bucket_current_free_index[NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS]; |
| 5240 | int app_layer_current_free_index = 0; |
| 5241 | struct necp_kernel_socket_policy *kernel_policy = NULL; |
| 5242 | |
| 5243 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5244 | |
| 5245 | // Reset mask to 0 |
| 5246 | necp_kernel_application_policies_condition_mask = 0; |
| 5247 | necp_kernel_socket_policies_condition_mask = 0; |
| 5248 | necp_kernel_application_policies_count = 0; |
| 5249 | necp_kernel_socket_policies_count = 0; |
| 5250 | necp_kernel_socket_policies_non_app_count = 0; |
| 5251 | |
| 5252 | // Reset all maps to NULL |
| 5253 | for (app_i = 0; app_i < NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS; app_i++) { |
| 5254 | if (necp_kernel_socket_policies_map[app_i] != NULL) { |
| 5255 | kfree_type(struct necp_kernel_socket_policy *, |
| 5256 | necp_kernel_socket_policies_map_counts[app_i] + 1, |
| 5257 | necp_kernel_socket_policies_map[app_i]); |
| 5258 | necp_kernel_socket_policies_map[app_i] = NULL; |
| 5259 | } |
| 5260 | |
| 5261 | // Init counts |
| 5262 | necp_kernel_socket_policies_map_counts[app_i] = 0; |
| 5263 | } |
| 5264 | if (necp_kernel_socket_policies_app_layer_map != NULL) { |
| 5265 | kfree_type(struct necp_kernel_socket_policy *, |
| 5266 | necp_kernel_socket_policies_app_layer_map_count + 1, |
| 5267 | necp_kernel_socket_policies_app_layer_map); |
| 5268 | } |
| 5269 | necp_kernel_socket_policies_app_layer_map = NULL; |
| 5270 | necp_kernel_socket_policies_app_layer_map_count = 0; |
| 5271 | |
| 5272 | // Create masks and counts |
| 5273 | LIST_FOREACH(kernel_policy, &necp_kernel_socket_policies, chain) { |
| 5274 | // App layer mask/count |
| 5275 | necp_kernel_application_policies_condition_mask |= kernel_policy->condition_mask; |
| 5276 | necp_kernel_application_policies_count++; |
| 5277 | necp_kernel_socket_policies_app_layer_map_count++; |
| 5278 | |
| 5279 | if ((kernel_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE)) { |
| 5280 | // Agent type conditions only apply to app layer |
| 5281 | continue; |
| 5282 | } |
| 5283 | |
| 5284 | // Update socket layer bucket mask/counts |
| 5285 | necp_kernel_socket_policies_condition_mask |= kernel_policy->condition_mask; |
| 5286 | necp_kernel_socket_policies_count++; |
| 5287 | |
| 5288 | if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID) || |
| 5289 | kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_APP_ID) { |
| 5290 | necp_kernel_socket_policies_non_app_count++; |
| 5291 | for (app_i = 0; app_i < NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS; app_i++) { |
| 5292 | necp_kernel_socket_policies_map_counts[app_i]++; |
| 5293 | } |
| 5294 | } else { |
| 5295 | necp_kernel_socket_policies_map_counts[NECP_SOCKET_MAP_APP_ID_TO_BUCKET(kernel_policy->cond_app_id)]++; |
| 5296 | } |
| 5297 | } |
| 5298 | |
| 5299 | // Allocate maps |
| 5300 | for (app_i = 0; app_i < NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS; app_i++) { |
| 5301 | if (necp_kernel_socket_policies_map_counts[app_i] > 0) { |
| 5302 | // Allocate a NULL-terminated array of policy pointers for each bucket |
| 5303 | necp_kernel_socket_policies_map[app_i] = kalloc_type(struct necp_kernel_socket_policy *, |
| 5304 | necp_kernel_socket_policies_map_counts[app_i] + 1, Z_WAITOK | Z_ZERO); |
| 5305 | if (necp_kernel_socket_policies_map[app_i] == NULL) { |
| 5306 | goto fail; |
| 5307 | } |
| 5308 | } |
| 5309 | bucket_current_free_index[app_i] = 0; |
| 5310 | } |
| 5311 | necp_kernel_socket_policies_app_layer_map = kalloc_type(struct necp_kernel_socket_policy *, |
| 5312 | necp_kernel_socket_policies_app_layer_map_count + 1, Z_WAITOK | Z_ZERO); |
| 5313 | if (necp_kernel_socket_policies_app_layer_map == NULL) { |
| 5314 | goto fail; |
| 5315 | } |
| 5316 | |
| 5317 | // Fill out maps |
| 5318 | LIST_FOREACH(kernel_policy, &necp_kernel_socket_policies, chain) { |
| 5319 | // Add app layer policies |
| 5320 | if (!necp_dedup_policies || !necp_kernel_socket_policy_is_unnecessary(policy: kernel_policy, policy_array: necp_kernel_socket_policies_app_layer_map, valid_indices: app_layer_current_free_index)) { |
| 5321 | necp_kernel_socket_policies_app_layer_map[app_layer_current_free_index] = kernel_policy; |
| 5322 | app_layer_current_free_index++; |
| 5323 | necp_kernel_socket_policies_app_layer_map[app_layer_current_free_index] = NULL; |
| 5324 | } |
| 5325 | |
| 5326 | if ((kernel_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE)) { |
| 5327 | // Agent type conditions only apply to app layer |
| 5328 | continue; |
| 5329 | } |
| 5330 | |
| 5331 | // Add socket policies |
| 5332 | if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID) || |
| 5333 | kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_APP_ID) { |
| 5334 | for (app_i = 0; app_i < NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS; app_i++) { |
| 5335 | if (!necp_dedup_policies || !necp_kernel_socket_policy_is_unnecessary(policy: kernel_policy, policy_array: necp_kernel_socket_policies_map[app_i], valid_indices: bucket_current_free_index[app_i])) { |
| 5336 | (necp_kernel_socket_policies_map[app_i])[(bucket_current_free_index[app_i])] = kernel_policy; |
| 5337 | bucket_current_free_index[app_i]++; |
| 5338 | (necp_kernel_socket_policies_map[app_i])[(bucket_current_free_index[app_i])] = NULL; |
| 5339 | } |
| 5340 | } |
| 5341 | } else { |
| 5342 | app_i = NECP_SOCKET_MAP_APP_ID_TO_BUCKET(kernel_policy->cond_app_id); |
| 5343 | if (!necp_dedup_policies || !necp_kernel_socket_policy_is_unnecessary(policy: kernel_policy, policy_array: necp_kernel_socket_policies_map[app_i], valid_indices: bucket_current_free_index[app_i])) { |
| 5344 | (necp_kernel_socket_policies_map[app_i])[(bucket_current_free_index[app_i])] = kernel_policy; |
| 5345 | bucket_current_free_index[app_i]++; |
| 5346 | (necp_kernel_socket_policies_map[app_i])[(bucket_current_free_index[app_i])] = NULL; |
| 5347 | } |
| 5348 | } |
| 5349 | } |
| 5350 | necp_kernel_socket_policies_dump_all(); |
| 5351 | BUMP_KERNEL_SOCKET_POLICIES_GENERATION_COUNT(); |
| 5352 | return TRUE; |
| 5353 | |
| 5354 | fail: |
| 5355 | // Free memory, reset masks to 0 |
| 5356 | necp_kernel_application_policies_condition_mask = 0; |
| 5357 | necp_kernel_socket_policies_condition_mask = 0; |
| 5358 | necp_kernel_application_policies_count = 0; |
| 5359 | necp_kernel_socket_policies_count = 0; |
| 5360 | necp_kernel_socket_policies_non_app_count = 0; |
| 5361 | for (app_i = 0; app_i < NECP_KERNEL_SOCKET_POLICIES_MAP_NUM_APP_ID_BUCKETS; app_i++) { |
| 5362 | if (necp_kernel_socket_policies_map[app_i] != NULL) { |
| 5363 | kfree_type(struct necp_kernel_socket_policy *, |
| 5364 | necp_kernel_socket_policies_map_counts[app_i] + 1, |
| 5365 | necp_kernel_socket_policies_map[app_i]); |
| 5366 | necp_kernel_socket_policies_map[app_i] = NULL; |
| 5367 | } |
| 5368 | necp_kernel_socket_policies_map_counts[app_i] = 0; |
| 5369 | } |
| 5370 | if (necp_kernel_socket_policies_app_layer_map != NULL) { |
| 5371 | kfree_type(struct necp_kernel_socket_policy *, |
| 5372 | necp_kernel_socket_policies_app_layer_map_count + 1, |
| 5373 | necp_kernel_socket_policies_app_layer_map); |
| 5374 | necp_kernel_socket_policies_app_layer_map = NULL; |
| 5375 | } |
| 5376 | necp_kernel_socket_policies_app_layer_map_count = 0; |
| 5377 | return FALSE; |
| 5378 | } |
| 5379 | |
| 5380 | static u_int32_t |
| 5381 | necp_get_new_string_id(void) |
| 5382 | { |
| 5383 | static u_int32_t necp_last_string_id = 0; |
| 5384 | |
| 5385 | u_int32_t newid = 0; |
| 5386 | |
| 5387 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5388 | |
| 5389 | bool wrapped = FALSE; |
| 5390 | do { |
| 5391 | necp_last_string_id++; |
| 5392 | if (necp_last_string_id < 1) { |
| 5393 | if (wrapped) { |
| 5394 | // Already wrapped, give up |
| 5395 | NECPLOG0(LOG_ERR, "Failed to find a free app UUID.\n"); |
| 5396 | return 0; |
| 5397 | } |
| 5398 | necp_last_string_id = 1; |
| 5399 | wrapped = TRUE; |
| 5400 | } |
| 5401 | newid = necp_last_string_id; |
| 5402 | } while (necp_lookup_string_with_id_locked(list: &necp_account_id_list, local_id: newid) != NULL); // If already used, keep trying |
| 5403 | |
| 5404 | if (newid == 0) { |
| 5405 | NECPLOG0(LOG_ERR, "Allocate string id failed.\n"); |
| 5406 | return 0; |
| 5407 | } |
| 5408 | |
| 5409 | return newid; |
| 5410 | } |
| 5411 | |
| 5412 | static struct necp_string_id_mapping * |
| 5413 | necp_lookup_string_to_id_locked(struct necp_string_id_mapping_list *list, char *string) |
| 5414 | { |
| 5415 | struct necp_string_id_mapping *searchentry = NULL; |
| 5416 | struct necp_string_id_mapping *foundentry = NULL; |
| 5417 | |
| 5418 | LIST_FOREACH(searchentry, list, chain) { |
| 5419 | if (strcmp(s1: searchentry->string, s2: string) == 0) { |
| 5420 | foundentry = searchentry; |
| 5421 | break; |
| 5422 | } |
| 5423 | } |
| 5424 | |
| 5425 | return foundentry; |
| 5426 | } |
| 5427 | |
| 5428 | static struct necp_string_id_mapping * |
| 5429 | necp_lookup_string_with_id_locked(struct necp_string_id_mapping_list *list, u_int32_t local_id) |
| 5430 | { |
| 5431 | struct necp_string_id_mapping *searchentry = NULL; |
| 5432 | struct necp_string_id_mapping *foundentry = NULL; |
| 5433 | |
| 5434 | LIST_FOREACH(searchentry, list, chain) { |
| 5435 | if (searchentry->id == local_id) { |
| 5436 | foundentry = searchentry; |
| 5437 | break; |
| 5438 | } |
| 5439 | } |
| 5440 | |
| 5441 | return foundentry; |
| 5442 | } |
| 5443 | |
| 5444 | static u_int32_t |
| 5445 | necp_create_string_to_id_mapping(struct necp_string_id_mapping_list *list, char *string) |
| 5446 | { |
| 5447 | u_int32_t string_id = 0; |
| 5448 | struct necp_string_id_mapping *existing_mapping = NULL; |
| 5449 | |
| 5450 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5451 | |
| 5452 | existing_mapping = necp_lookup_string_to_id_locked(list, string); |
| 5453 | if (existing_mapping != NULL) { |
| 5454 | string_id = existing_mapping->id; |
| 5455 | os_ref_retain_locked(rc: &existing_mapping->refcount); |
| 5456 | } else { |
| 5457 | struct necp_string_id_mapping *new_mapping = NULL; |
| 5458 | new_mapping = kalloc_type(struct necp_string_id_mapping, |
| 5459 | Z_WAITOK | Z_ZERO | Z_NOFAIL); |
| 5460 | |
| 5461 | size_t length = strlen(s: string) + 1; |
| 5462 | new_mapping->string = (char *)kalloc_data(length, Z_WAITOK); |
| 5463 | if (new_mapping->string != NULL) { |
| 5464 | memcpy(dst: new_mapping->string, src: string, n: length); |
| 5465 | new_mapping->id = necp_get_new_string_id(); |
| 5466 | os_ref_init(&new_mapping->refcount, &necp_refgrp); |
| 5467 | LIST_INSERT_HEAD(list, new_mapping, chain); |
| 5468 | string_id = new_mapping->id; |
| 5469 | } else { |
| 5470 | kfree_type(struct necp_string_id_mapping, new_mapping); |
| 5471 | new_mapping = NULL; |
| 5472 | } |
| 5473 | } |
| 5474 | return string_id; |
| 5475 | } |
| 5476 | |
| 5477 | static bool |
| 5478 | necp_remove_string_to_id_mapping(struct necp_string_id_mapping_list *list, char *string) |
| 5479 | { |
| 5480 | struct necp_string_id_mapping *existing_mapping = NULL; |
| 5481 | |
| 5482 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5483 | |
| 5484 | existing_mapping = necp_lookup_string_to_id_locked(list, string); |
| 5485 | if (existing_mapping != NULL) { |
| 5486 | if (os_ref_release_locked(rc: &existing_mapping->refcount) == 0) { |
| 5487 | LIST_REMOVE(existing_mapping, chain); |
| 5488 | kfree_data_addr(existing_mapping->string); |
| 5489 | kfree_type(struct necp_string_id_mapping, existing_mapping); |
| 5490 | } |
| 5491 | return TRUE; |
| 5492 | } |
| 5493 | |
| 5494 | return FALSE; |
| 5495 | } |
| 5496 | |
| 5497 | static struct necp_domain_filter * |
| 5498 | necp_lookup_domain_filter(struct necp_domain_filter_list *list, u_int32_t filter_id) |
| 5499 | { |
| 5500 | struct necp_domain_filter *searchfilter = NULL; |
| 5501 | struct necp_domain_filter *foundfilter = NULL; |
| 5502 | |
| 5503 | LIST_FOREACH(searchfilter, list, chain) { |
| 5504 | if (searchfilter->id == filter_id) { |
| 5505 | foundfilter = searchfilter; |
| 5506 | break; |
| 5507 | } |
| 5508 | } |
| 5509 | |
| 5510 | return foundfilter; |
| 5511 | } |
| 5512 | |
| 5513 | static u_int32_t |
| 5514 | necp_get_new_domain_filter_id(void) |
| 5515 | { |
| 5516 | static u_int32_t necp_last_filter_id = 0; |
| 5517 | |
| 5518 | u_int32_t newid = 0; |
| 5519 | |
| 5520 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5521 | |
| 5522 | bool wrapped = FALSE; |
| 5523 | do { |
| 5524 | necp_last_filter_id++; |
| 5525 | if (necp_last_filter_id < 1) { |
| 5526 | if (wrapped) { |
| 5527 | // Already wrapped, give up |
| 5528 | NECPLOG0(LOG_ERR, "Failed to find a free filter ID.\n"); |
| 5529 | return 0; |
| 5530 | } |
| 5531 | necp_last_filter_id = 1; |
| 5532 | wrapped = TRUE; |
| 5533 | } |
| 5534 | newid = necp_last_filter_id; |
| 5535 | } while (necp_lookup_domain_filter(list: &necp_global_domain_filter_list, filter_id: newid) != NULL); // If already used, keep trying |
| 5536 | |
| 5537 | if (newid == 0) { |
| 5538 | NECPLOG0(LOG_ERR, "Allocate filter id failed.\n"); |
| 5539 | return 0; |
| 5540 | } |
| 5541 | |
| 5542 | return newid; |
| 5543 | } |
| 5544 | |
| 5545 | static u_int32_t |
| 5546 | necp_create_domain_filter(struct necp_domain_filter_list *list, struct necp_domain_filter_list *owner_list, struct net_bloom_filter *filter) |
| 5547 | { |
| 5548 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5549 | |
| 5550 | struct necp_domain_filter *new_filter = NULL; |
| 5551 | new_filter = kalloc_type(struct necp_domain_filter, |
| 5552 | Z_WAITOK | Z_ZERO | Z_NOFAIL); |
| 5553 | |
| 5554 | new_filter->filter = filter; |
| 5555 | new_filter->id = necp_get_new_domain_filter_id(); |
| 5556 | LIST_INSERT_HEAD(list, new_filter, chain); |
| 5557 | LIST_INSERT_HEAD(owner_list, new_filter, owner_chain); |
| 5558 | os_ref_init(&new_filter->refcount, &necp_refgrp); |
| 5559 | |
| 5560 | return new_filter->id; |
| 5561 | } |
| 5562 | |
| 5563 | static bool |
| 5564 | necp_remove_domain_filter(struct necp_domain_filter_list *list, __unused struct necp_domain_filter_list *owner_list, u_int32_t filter_id) |
| 5565 | { |
| 5566 | struct necp_domain_filter *existing_filter = NULL; |
| 5567 | |
| 5568 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5569 | |
| 5570 | existing_filter = necp_lookup_domain_filter(list, filter_id); |
| 5571 | if (existing_filter != NULL) { |
| 5572 | if (os_ref_release_locked(rc: &existing_filter->refcount) == 0) { |
| 5573 | LIST_REMOVE(existing_filter, chain); |
| 5574 | LIST_REMOVE(existing_filter, owner_chain); |
| 5575 | net_bloom_filter_destroy(filter: existing_filter->filter); |
| 5576 | kfree_type(struct necp_domain_filter, existing_filter); |
| 5577 | } |
| 5578 | return true; |
| 5579 | } |
| 5580 | |
| 5581 | return false; |
| 5582 | } |
| 5583 | |
| 5584 | #define NECP_FIRST_VALID_ROUTE_RULE_ID 1 |
| 5585 | #define NECP_FIRST_VALID_AGGREGATE_ROUTE_RULE_ID UINT16_MAX |
| 5586 | static u_int32_t |
| 5587 | necp_get_new_route_rule_id(bool aggregate) |
| 5588 | { |
| 5589 | static u_int32_t necp_last_route_rule_id = 0; |
| 5590 | static u_int32_t necp_last_aggregate_route_rule_id = 0; |
| 5591 | |
| 5592 | u_int32_t newid = 0; |
| 5593 | |
| 5594 | if (!aggregate) { |
| 5595 | // Main necp_kernel_policy_lock protects non-aggregate rule IDs |
| 5596 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5597 | |
| 5598 | bool wrapped = FALSE; |
| 5599 | do { |
| 5600 | necp_last_route_rule_id++; |
| 5601 | if (necp_last_route_rule_id < NECP_FIRST_VALID_ROUTE_RULE_ID || |
| 5602 | necp_last_route_rule_id >= NECP_FIRST_VALID_AGGREGATE_ROUTE_RULE_ID) { |
| 5603 | if (wrapped) { |
| 5604 | // Already wrapped, give up |
| 5605 | NECPLOG0(LOG_ERR, "Failed to find a free route rule id.\n"); |
| 5606 | return 0; |
| 5607 | } |
| 5608 | necp_last_route_rule_id = NECP_FIRST_VALID_ROUTE_RULE_ID; |
| 5609 | wrapped = TRUE; |
| 5610 | } |
| 5611 | newid = necp_last_route_rule_id; |
| 5612 | } while (necp_lookup_route_rule_locked(list: &necp_route_rules, route_rule_id: newid) != NULL); // If already used, keep trying |
| 5613 | } else { |
| 5614 | // necp_route_rule_lock protects aggregate rule IDs |
| 5615 | LCK_RW_ASSERT(&necp_route_rule_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5616 | |
| 5617 | bool wrapped = FALSE; |
| 5618 | do { |
| 5619 | necp_last_aggregate_route_rule_id++; |
| 5620 | if (necp_last_aggregate_route_rule_id < NECP_FIRST_VALID_AGGREGATE_ROUTE_RULE_ID) { |
| 5621 | if (wrapped) { |
| 5622 | // Already wrapped, give up |
| 5623 | NECPLOG0(LOG_ERR, "Failed to find a free aggregate route rule id.\n"); |
| 5624 | return 0; |
| 5625 | } |
| 5626 | necp_last_aggregate_route_rule_id = NECP_FIRST_VALID_AGGREGATE_ROUTE_RULE_ID; |
| 5627 | wrapped = TRUE; |
| 5628 | } |
| 5629 | newid = necp_last_aggregate_route_rule_id; |
| 5630 | } while (necp_lookup_route_rule_locked(list: &necp_route_rules, route_rule_id: newid) != NULL); // If already used, keep trying |
| 5631 | } |
| 5632 | |
| 5633 | if (newid == 0) { |
| 5634 | NECPLOG0(LOG_ERR, "Allocate route rule ID failed.\n"); |
| 5635 | return 0; |
| 5636 | } |
| 5637 | |
| 5638 | return newid; |
| 5639 | } |
| 5640 | |
| 5641 | static struct necp_route_rule * |
| 5642 | necp_lookup_route_rule_locked(struct necp_route_rule_list *list, u_int32_t route_rule_id) |
| 5643 | { |
| 5644 | struct necp_route_rule *searchentry = NULL; |
| 5645 | struct necp_route_rule *foundentry = NULL; |
| 5646 | |
| 5647 | LIST_FOREACH(searchentry, list, chain) { |
| 5648 | if (searchentry->id == route_rule_id) { |
| 5649 | foundentry = searchentry; |
| 5650 | break; |
| 5651 | } |
| 5652 | } |
| 5653 | |
| 5654 | return foundentry; |
| 5655 | } |
| 5656 | |
| 5657 | static struct necp_route_rule * |
| 5658 | necp_lookup_route_rule_by_contents_locked(struct necp_route_rule_list *list, u_int8_t default_action, u_int8_t cellular_action, u_int8_t wifi_action, u_int8_t wired_action, u_int8_t expensive_action, u_int8_t constrained_action, u_int8_t companion_action, u_int32_t *if_indices, u_int8_t *if_actions, uuid_t netagent_uuid, uuid_t match_netagent_uuid, u_int32_t control_unit, u_int32_t effective_type) |
| 5659 | { |
| 5660 | struct necp_route_rule *searchentry = NULL; |
| 5661 | struct necp_route_rule *foundentry = NULL; |
| 5662 | |
| 5663 | LIST_FOREACH(searchentry, list, chain) { |
| 5664 | if (searchentry->default_action == default_action && |
| 5665 | searchentry->cellular_action == cellular_action && |
| 5666 | searchentry->wifi_action == wifi_action && |
| 5667 | searchentry->wired_action == wired_action && |
| 5668 | searchentry->expensive_action == expensive_action && |
| 5669 | searchentry->constrained_action == constrained_action && |
| 5670 | searchentry->companion_action == companion_action && |
| 5671 | searchentry->control_unit == control_unit && |
| 5672 | searchentry->effective_type == effective_type) { |
| 5673 | bool match_failed = FALSE; |
| 5674 | size_t index_a = 0; |
| 5675 | size_t index_b = 0; |
| 5676 | size_t count_a = 0; |
| 5677 | size_t count_b = 0; |
| 5678 | for (index_a = 0; index_a < MAX_ROUTE_RULE_INTERFACES; index_a++) { |
| 5679 | bool found_index = FALSE; |
| 5680 | if (searchentry->exception_if_indices[index_a] == 0) { |
| 5681 | break; |
| 5682 | } |
| 5683 | count_a++; |
| 5684 | for (index_b = 0; index_b < MAX_ROUTE_RULE_INTERFACES; index_b++) { |
| 5685 | if (if_indices[index_b] == 0) { |
| 5686 | break; |
| 5687 | } |
| 5688 | if (index_b >= count_b) { |
| 5689 | count_b = index_b + 1; |
| 5690 | } |
| 5691 | if (searchentry->exception_if_indices[index_a] == if_indices[index_b] && |
| 5692 | searchentry->exception_if_actions[index_a] == if_actions[index_b]) { |
| 5693 | found_index = TRUE; |
| 5694 | break; |
| 5695 | } |
| 5696 | } |
| 5697 | if (!found_index) { |
| 5698 | match_failed = TRUE; |
| 5699 | break; |
| 5700 | } |
| 5701 | } |
| 5702 | |
| 5703 | if (match_failed || count_a != count_b) { |
| 5704 | continue; |
| 5705 | } |
| 5706 | |
| 5707 | bool has_agent_a = !uuid_is_null(uu: netagent_uuid); |
| 5708 | bool has_agent_b = (searchentry->netagent_id != 0); |
| 5709 | if (has_agent_a != has_agent_b) { |
| 5710 | continue; |
| 5711 | } |
| 5712 | |
| 5713 | if (has_agent_a) { |
| 5714 | struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: searchentry->netagent_id); |
| 5715 | if (mapping == NULL) { |
| 5716 | // Bad mapping, doesn't match |
| 5717 | continue; |
| 5718 | } |
| 5719 | if (uuid_compare(uu1: mapping->uuid, uu2: netagent_uuid) != 0) { |
| 5720 | // UUIDs don't match |
| 5721 | continue; |
| 5722 | } |
| 5723 | } |
| 5724 | |
| 5725 | bool has_match_agent_a = !uuid_is_null(uu: match_netagent_uuid); |
| 5726 | bool has_match_agent_b = (searchentry->match_netagent_id != 0); |
| 5727 | if (has_match_agent_a != has_match_agent_b) { |
| 5728 | continue; |
| 5729 | } |
| 5730 | |
| 5731 | if (has_match_agent_a) { |
| 5732 | struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: searchentry->match_netagent_id); |
| 5733 | if (mapping == NULL) { |
| 5734 | // Bad mapping, doesn't match |
| 5735 | continue; |
| 5736 | } |
| 5737 | if (uuid_compare(uu1: mapping->uuid, uu2: match_netagent_uuid) != 0) { |
| 5738 | // UUIDs don't match |
| 5739 | continue; |
| 5740 | } |
| 5741 | } |
| 5742 | |
| 5743 | // Rules match! |
| 5744 | foundentry = searchentry; |
| 5745 | break; |
| 5746 | } |
| 5747 | } |
| 5748 | |
| 5749 | return foundentry; |
| 5750 | } |
| 5751 | |
| 5752 | static u_int32_t |
| 5753 | necp_create_route_rule(struct necp_route_rule_list *list, u_int8_t *route_rules_array, u_int32_t route_rules_array_size, |
| 5754 | bool *has_socket_only_actions) |
| 5755 | { |
| 5756 | size_t offset = 0; |
| 5757 | u_int32_t route_rule_id = 0; |
| 5758 | struct necp_route_rule *existing_rule = NULL; |
| 5759 | u_int8_t default_action = NECP_ROUTE_RULE_ALLOW_INTERFACE; |
| 5760 | u_int8_t cellular_action = NECP_ROUTE_RULE_NONE; |
| 5761 | u_int8_t wifi_action = NECP_ROUTE_RULE_NONE; |
| 5762 | u_int8_t wired_action = NECP_ROUTE_RULE_NONE; |
| 5763 | u_int8_t expensive_action = NECP_ROUTE_RULE_NONE; |
| 5764 | u_int8_t constrained_action = NECP_ROUTE_RULE_NONE; |
| 5765 | u_int8_t companion_action = NECP_ROUTE_RULE_NONE; |
| 5766 | u_int32_t if_indices[MAX_ROUTE_RULE_INTERFACES]; |
| 5767 | size_t num_valid_indices = 0; |
| 5768 | memset(s: &if_indices, c: 0, n: sizeof(if_indices)); |
| 5769 | u_int8_t if_actions[MAX_ROUTE_RULE_INTERFACES]; |
| 5770 | memset(s: &if_actions, c: 0, n: sizeof(if_actions)); |
| 5771 | |
| 5772 | uuid_t netagent_uuid = {}; |
| 5773 | |
| 5774 | uuid_t match_netagent_uuid = {}; |
| 5775 | uint32_t control_unit = 0; |
| 5776 | uint32_t effective_type = 0; |
| 5777 | |
| 5778 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5779 | |
| 5780 | if (route_rules_array == NULL || route_rules_array_size == 0 || has_socket_only_actions == NULL) { |
| 5781 | return 0; |
| 5782 | } |
| 5783 | |
| 5784 | // Process rules |
| 5785 | while ((offset + sizeof(u_int8_t) + sizeof(u_int32_t)) < route_rules_array_size) { |
| 5786 | ifnet_t rule_interface = NULL; |
| 5787 | char interface_name[IFXNAMSIZ]; |
| 5788 | u_int32_t length = 0; |
| 5789 | u_int8_t *value = necp_buffer_get_tlv_value(buffer: route_rules_array, tlv_offset: offset, value_size: &length); |
| 5790 | |
| 5791 | if (offset + sizeof(u_int8_t) + sizeof(u_int32_t) + length > route_rules_array_size) { |
| 5792 | // Invalid TLV goes beyond end of the rules array |
| 5793 | break; |
| 5794 | } |
| 5795 | |
| 5796 | // Increment offset for the next time through the loop |
| 5797 | offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length; |
| 5798 | |
| 5799 | u_int8_t rule_action = necp_policy_condition_get_type_from_buffer(buffer: value, length); |
| 5800 | u_int8_t rule_flags = necp_policy_condition_get_flags_from_buffer(buffer: value, length); |
| 5801 | u_int32_t rule_length = necp_policy_condition_get_value_length_from_buffer(buffer: value, length); |
| 5802 | u_int8_t *rule_value = necp_policy_condition_get_value_pointer_from_buffer(buffer: value, length); |
| 5803 | |
| 5804 | if (rule_action == NECP_ROUTE_RULE_NONE) { |
| 5805 | // Don't allow an explicit rule to be None action |
| 5806 | continue; |
| 5807 | } |
| 5808 | |
| 5809 | if (rule_action == NECP_ROUTE_RULE_USE_NETAGENT || |
| 5810 | rule_action == NECP_ROUTE_RULE_REMOVE_NETAGENT) { |
| 5811 | if (rule_length < sizeof(uuid_t)) { |
| 5812 | // Too short, skip |
| 5813 | continue; |
| 5814 | } |
| 5815 | |
| 5816 | if (!uuid_is_null(uu: netagent_uuid)) { |
| 5817 | if (uuid_compare(uu1: netagent_uuid, uu2: rule_value) != 0) { |
| 5818 | // UUIDs don't match, skip |
| 5819 | continue; |
| 5820 | } |
| 5821 | } else { |
| 5822 | // Copy out agent UUID |
| 5823 | memcpy(dst: netagent_uuid, src: rule_value, n: sizeof(netagent_uuid)); |
| 5824 | } |
| 5825 | |
| 5826 | // Adjust remaining length |
| 5827 | rule_value += sizeof(netagent_uuid); |
| 5828 | rule_length -= sizeof(netagent_uuid); |
| 5829 | *has_socket_only_actions = true; |
| 5830 | } else if (rule_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 5831 | if (rule_length < sizeof(control_unit)) { |
| 5832 | // Too short, skip |
| 5833 | continue; |
| 5834 | } |
| 5835 | |
| 5836 | memcpy(dst: &control_unit, src: rule_value, n: sizeof(control_unit)); |
| 5837 | |
| 5838 | // Adjust remaining length |
| 5839 | rule_value += sizeof(control_unit); |
| 5840 | rule_length -= sizeof(control_unit); |
| 5841 | *has_socket_only_actions = true; |
| 5842 | } else if (rule_action == NECP_ROUTE_RULE_DENY_INTERFACE_WITH_TYPE) { |
| 5843 | if (rule_length < sizeof(effective_type)) { |
| 5844 | // Too short, skip |
| 5845 | continue; |
| 5846 | } |
| 5847 | |
| 5848 | memcpy(dst: &effective_type, src: rule_value, n: sizeof(effective_type)); |
| 5849 | |
| 5850 | // Adjust remaining length |
| 5851 | rule_value += sizeof(effective_type); |
| 5852 | rule_length -= sizeof(effective_type); |
| 5853 | } |
| 5854 | |
| 5855 | if (rule_length == 0) { |
| 5856 | if (rule_flags & NECP_ROUTE_RULE_FLAG_CELLULAR) { |
| 5857 | cellular_action = rule_action; |
| 5858 | } |
| 5859 | if (rule_flags & NECP_ROUTE_RULE_FLAG_WIFI) { |
| 5860 | wifi_action = rule_action; |
| 5861 | } |
| 5862 | if (rule_flags & NECP_ROUTE_RULE_FLAG_WIRED) { |
| 5863 | wired_action = rule_action; |
| 5864 | } |
| 5865 | if (rule_flags & NECP_ROUTE_RULE_FLAG_EXPENSIVE) { |
| 5866 | expensive_action = rule_action; |
| 5867 | } |
| 5868 | if (rule_flags & NECP_ROUTE_RULE_FLAG_CONSTRAINED) { |
| 5869 | constrained_action = rule_action; |
| 5870 | } |
| 5871 | if (rule_flags & NECP_ROUTE_RULE_FLAG_COMPANION) { |
| 5872 | companion_action = rule_action; |
| 5873 | } |
| 5874 | if (rule_flags == 0) { |
| 5875 | default_action = rule_action; |
| 5876 | } |
| 5877 | continue; |
| 5878 | } else if (rule_flags & NECP_ROUTE_RULE_FLAG_NETAGENT) { |
| 5879 | if (rule_length == sizeof(uuid_t)) { |
| 5880 | memcpy(dst: match_netagent_uuid, src: rule_value, n: sizeof(match_netagent_uuid)); |
| 5881 | default_action = rule_action; |
| 5882 | } |
| 5883 | continue; |
| 5884 | } |
| 5885 | |
| 5886 | if (num_valid_indices >= MAX_ROUTE_RULE_INTERFACES) { |
| 5887 | continue; |
| 5888 | } |
| 5889 | |
| 5890 | if (rule_length <= IFXNAMSIZ) { |
| 5891 | memcpy(dst: interface_name, src: rule_value, n: rule_length); |
| 5892 | interface_name[rule_length - 1] = 0; // Make sure the string is NULL terminated |
| 5893 | if (ifnet_find_by_name(ifname: interface_name, interface: &rule_interface) == 0) { |
| 5894 | if_actions[num_valid_indices] = rule_action; |
| 5895 | if_indices[num_valid_indices++] = rule_interface->if_index; |
| 5896 | ifnet_release(interface: rule_interface); |
| 5897 | } |
| 5898 | } |
| 5899 | } |
| 5900 | |
| 5901 | existing_rule = necp_lookup_route_rule_by_contents_locked(list, default_action, cellular_action, wifi_action, wired_action, expensive_action, constrained_action, companion_action, if_indices, if_actions, netagent_uuid, match_netagent_uuid, control_unit, effective_type); |
| 5902 | if (existing_rule != NULL) { |
| 5903 | route_rule_id = existing_rule->id; |
| 5904 | os_ref_retain_locked(rc: &existing_rule->refcount); |
| 5905 | } else { |
| 5906 | struct necp_route_rule *new_rule = NULL; |
| 5907 | new_rule = kalloc_type(struct necp_route_rule, |
| 5908 | Z_WAITOK | Z_ZERO | Z_NOFAIL); |
| 5909 | route_rule_id = new_rule->id = necp_get_new_route_rule_id(false); |
| 5910 | if (!uuid_is_null(uu: netagent_uuid)) { |
| 5911 | new_rule->netagent_id = necp_create_uuid_service_id_mapping(uuid: netagent_uuid); |
| 5912 | } |
| 5913 | if (!uuid_is_null(uu: match_netagent_uuid)) { |
| 5914 | new_rule->match_netagent_id = necp_create_uuid_service_id_mapping(uuid: match_netagent_uuid); |
| 5915 | } |
| 5916 | new_rule->effective_type = effective_type; |
| 5917 | new_rule->control_unit = control_unit; |
| 5918 | new_rule->default_action = default_action; |
| 5919 | new_rule->cellular_action = cellular_action; |
| 5920 | new_rule->wifi_action = wifi_action; |
| 5921 | new_rule->wired_action = wired_action; |
| 5922 | new_rule->expensive_action = expensive_action; |
| 5923 | new_rule->constrained_action = constrained_action; |
| 5924 | new_rule->companion_action = companion_action; |
| 5925 | memcpy(dst: &new_rule->exception_if_indices, src: &if_indices, n: sizeof(if_indices)); |
| 5926 | memcpy(dst: &new_rule->exception_if_actions, src: &if_actions, n: sizeof(if_actions)); |
| 5927 | os_ref_init(&new_rule->refcount, &necp_refgrp); |
| 5928 | LIST_INSERT_HEAD(list, new_rule, chain); |
| 5929 | } |
| 5930 | return route_rule_id; |
| 5931 | } |
| 5932 | |
| 5933 | static void |
| 5934 | necp_remove_aggregate_route_rule_for_id(u_int32_t rule_id) |
| 5935 | { |
| 5936 | if (rule_id) { |
| 5937 | lck_rw_lock_exclusive(lck: &necp_route_rule_lock); |
| 5938 | |
| 5939 | struct necp_aggregate_route_rule *existing_rule = NULL; |
| 5940 | struct necp_aggregate_route_rule *tmp_rule = NULL; |
| 5941 | |
| 5942 | LIST_FOREACH_SAFE(existing_rule, &necp_aggregate_route_rules, chain, tmp_rule) { |
| 5943 | int index = 0; |
| 5944 | for (index = 0; index < MAX_AGGREGATE_ROUTE_RULES; index++) { |
| 5945 | u_int32_t route_rule_id = existing_rule->rule_ids[index]; |
| 5946 | if (route_rule_id == rule_id) { |
| 5947 | LIST_REMOVE(existing_rule, chain); |
| 5948 | kfree_type(struct necp_aggregate_route_rule, existing_rule); |
| 5949 | break; |
| 5950 | } |
| 5951 | } |
| 5952 | } |
| 5953 | |
| 5954 | lck_rw_done(lck: &necp_route_rule_lock); |
| 5955 | } |
| 5956 | } |
| 5957 | |
| 5958 | static bool |
| 5959 | necp_remove_route_rule(struct necp_route_rule_list *list, u_int32_t route_rule_id) |
| 5960 | { |
| 5961 | struct necp_route_rule *existing_rule = NULL; |
| 5962 | |
| 5963 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 5964 | |
| 5965 | existing_rule = necp_lookup_route_rule_locked(list, route_rule_id); |
| 5966 | if (existing_rule != NULL) { |
| 5967 | if (os_ref_release_locked(rc: &existing_rule->refcount) == 0) { |
| 5968 | necp_remove_aggregate_route_rule_for_id(rule_id: existing_rule->id); |
| 5969 | necp_remove_uuid_service_id_mapping_with_service_id(service_id: existing_rule->netagent_id); |
| 5970 | necp_remove_uuid_service_id_mapping_with_service_id(service_id: existing_rule->match_netagent_id); |
| 5971 | LIST_REMOVE(existing_rule, chain); |
| 5972 | kfree_type(struct necp_route_rule, existing_rule); |
| 5973 | } |
| 5974 | return TRUE; |
| 5975 | } |
| 5976 | |
| 5977 | return FALSE; |
| 5978 | } |
| 5979 | |
| 5980 | static struct necp_aggregate_route_rule * |
| 5981 | necp_lookup_aggregate_route_rule_locked(u_int32_t route_rule_id) |
| 5982 | { |
| 5983 | struct necp_aggregate_route_rule *searchentry = NULL; |
| 5984 | struct necp_aggregate_route_rule *foundentry = NULL; |
| 5985 | |
| 5986 | lck_rw_lock_shared(lck: &necp_route_rule_lock); |
| 5987 | |
| 5988 | LIST_FOREACH(searchentry, &necp_aggregate_route_rules, chain) { |
| 5989 | if (searchentry->id == route_rule_id) { |
| 5990 | foundentry = searchentry; |
| 5991 | break; |
| 5992 | } |
| 5993 | } |
| 5994 | |
| 5995 | lck_rw_done(lck: &necp_route_rule_lock); |
| 5996 | |
| 5997 | return foundentry; |
| 5998 | } |
| 5999 | |
| 6000 | static u_int32_t |
| 6001 | necp_create_aggregate_route_rule(u_int32_t *rule_ids) |
| 6002 | { |
| 6003 | u_int32_t aggregate_route_rule_id = 0; |
| 6004 | struct necp_aggregate_route_rule *new_rule = NULL; |
| 6005 | struct necp_aggregate_route_rule *existing_rule = NULL; |
| 6006 | |
| 6007 | lck_rw_lock_exclusive(lck: &necp_route_rule_lock); |
| 6008 | |
| 6009 | // Check if the rule already exists |
| 6010 | LIST_FOREACH(existing_rule, &necp_aggregate_route_rules, chain) { |
| 6011 | if (memcmp(s1: existing_rule->rule_ids, s2: rule_ids, n: (sizeof(u_int32_t) * MAX_AGGREGATE_ROUTE_RULES)) == 0) { |
| 6012 | lck_rw_done(lck: &necp_route_rule_lock); |
| 6013 | return existing_rule->id; |
| 6014 | } |
| 6015 | } |
| 6016 | |
| 6017 | new_rule = kalloc_type(struct necp_aggregate_route_rule, |
| 6018 | Z_WAITOK | Z_ZERO | Z_NOFAIL); |
| 6019 | aggregate_route_rule_id = new_rule->id = necp_get_new_route_rule_id(true); |
| 6020 | new_rule->id = aggregate_route_rule_id; |
| 6021 | memcpy(dst: new_rule->rule_ids, src: rule_ids, n: (sizeof(u_int32_t) * MAX_AGGREGATE_ROUTE_RULES)); |
| 6022 | LIST_INSERT_HEAD(&necp_aggregate_route_rules, new_rule, chain); |
| 6023 | lck_rw_done(lck: &necp_route_rule_lock); |
| 6024 | |
| 6025 | return aggregate_route_rule_id; |
| 6026 | } |
| 6027 | |
| 6028 | #define NECP_NULL_SERVICE_ID 1 |
| 6029 | #define NECP_FIRST_VALID_SERVICE_ID 2 |
| 6030 | #define NECP_FIRST_VALID_APP_ID UINT16_MAX |
| 6031 | static u_int32_t |
| 6032 | necp_get_new_uuid_id(bool service) |
| 6033 | { |
| 6034 | static u_int32_t necp_last_service_uuid_id = 0; |
| 6035 | static u_int32_t necp_last_app_uuid_id = 0; |
| 6036 | |
| 6037 | u_int32_t newid = 0; |
| 6038 | |
| 6039 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 6040 | |
| 6041 | if (service) { |
| 6042 | bool wrapped = FALSE; |
| 6043 | do { |
| 6044 | necp_last_service_uuid_id++; |
| 6045 | if (necp_last_service_uuid_id < NECP_FIRST_VALID_SERVICE_ID || |
| 6046 | necp_last_service_uuid_id >= NECP_FIRST_VALID_APP_ID) { |
| 6047 | if (wrapped) { |
| 6048 | // Already wrapped, give up |
| 6049 | NECPLOG0(LOG_ERR, "Failed to find a free service UUID.\n"); |
| 6050 | return NECP_NULL_SERVICE_ID; |
| 6051 | } |
| 6052 | necp_last_service_uuid_id = NECP_FIRST_VALID_SERVICE_ID; |
| 6053 | wrapped = TRUE; |
| 6054 | } |
| 6055 | newid = necp_last_service_uuid_id; |
| 6056 | } while (necp_uuid_lookup_uuid_with_service_id_locked(local_id: newid) != NULL); // If already used, keep trying |
| 6057 | } else { |
| 6058 | bool wrapped = FALSE; |
| 6059 | do { |
| 6060 | necp_last_app_uuid_id++; |
| 6061 | if (necp_last_app_uuid_id < NECP_FIRST_VALID_APP_ID) { |
| 6062 | if (wrapped) { |
| 6063 | // Already wrapped, give up |
| 6064 | NECPLOG0(LOG_ERR, "Failed to find a free app UUID.\n"); |
| 6065 | return NECP_NULL_SERVICE_ID; |
| 6066 | } |
| 6067 | necp_last_app_uuid_id = NECP_FIRST_VALID_APP_ID; |
| 6068 | wrapped = TRUE; |
| 6069 | } |
| 6070 | newid = necp_last_app_uuid_id; |
| 6071 | } while (necp_uuid_lookup_uuid_with_app_id_locked(local_id: newid) != NULL); // If already used, keep trying |
| 6072 | } |
| 6073 | |
| 6074 | if (newid == NECP_NULL_SERVICE_ID) { |
| 6075 | NECPLOG0(LOG_ERR, "Allocate uuid ID failed.\n"); |
| 6076 | return NECP_NULL_SERVICE_ID; |
| 6077 | } |
| 6078 | |
| 6079 | return newid; |
| 6080 | } |
| 6081 | |
| 6082 | static struct necp_uuid_id_mapping * |
| 6083 | necp_uuid_lookup_app_id_locked(uuid_t uuid) |
| 6084 | { |
| 6085 | struct necp_uuid_id_mapping *searchentry = NULL; |
| 6086 | struct necp_uuid_id_mapping *foundentry = NULL; |
| 6087 | |
| 6088 | LIST_FOREACH(searchentry, APPUUIDHASH(uuid), chain) { |
| 6089 | if (uuid_compare(uu1: searchentry->uuid, uu2: uuid) == 0) { |
| 6090 | foundentry = searchentry; |
| 6091 | break; |
| 6092 | } |
| 6093 | } |
| 6094 | |
| 6095 | return foundentry; |
| 6096 | } |
| 6097 | |
| 6098 | static struct necp_uuid_id_mapping * |
| 6099 | necp_uuid_lookup_uuid_with_app_id_locked(u_int32_t local_id) |
| 6100 | { |
| 6101 | struct necp_uuid_id_mapping *searchentry = NULL; |
| 6102 | struct necp_uuid_id_mapping *foundentry = NULL; |
| 6103 | |
| 6104 | struct necp_uuid_id_mapping_head *uuid_list_head = NULL; |
| 6105 | for (uuid_list_head = &necp_uuid_app_id_hashtbl[necp_uuid_app_id_hash_num_buckets - 1]; uuid_list_head >= necp_uuid_app_id_hashtbl; uuid_list_head--) { |
| 6106 | LIST_FOREACH(searchentry, uuid_list_head, chain) { |
| 6107 | if (searchentry->id == local_id) { |
| 6108 | foundentry = searchentry; |
| 6109 | break; |
| 6110 | } |
| 6111 | } |
| 6112 | } |
| 6113 | |
| 6114 | return foundentry; |
| 6115 | } |
| 6116 | |
| 6117 | static u_int32_t |
| 6118 | necp_create_uuid_app_id_mapping(uuid_t uuid, bool *allocated_mapping, bool uuid_policy_table) |
| 6119 | { |
| 6120 | u_int32_t local_id = 0; |
| 6121 | struct necp_uuid_id_mapping *existing_mapping = NULL; |
| 6122 | |
| 6123 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 6124 | |
| 6125 | if (allocated_mapping) { |
| 6126 | *allocated_mapping = FALSE; |
| 6127 | } |
| 6128 | |
| 6129 | existing_mapping = necp_uuid_lookup_app_id_locked(uuid); |
| 6130 | if (existing_mapping != NULL) { |
| 6131 | local_id = existing_mapping->id; |
| 6132 | os_ref_retain_locked(rc: &existing_mapping->refcount); |
| 6133 | if (uuid_policy_table) { |
| 6134 | existing_mapping->table_usecount++; |
| 6135 | } |
| 6136 | } else { |
| 6137 | struct necp_uuid_id_mapping *new_mapping = NULL; |
| 6138 | new_mapping = kalloc_type(struct necp_uuid_id_mapping, |
| 6139 | Z_WAITOK | Z_NOFAIL); |
| 6140 | uuid_copy(dst: new_mapping->uuid, src: uuid); |
| 6141 | new_mapping->id = necp_get_new_uuid_id(false); |
| 6142 | os_ref_init(&new_mapping->refcount, &necp_refgrp); |
| 6143 | if (uuid_policy_table) { |
| 6144 | new_mapping->table_usecount = 1; |
| 6145 | } else { |
| 6146 | new_mapping->table_usecount = 0; |
| 6147 | } |
| 6148 | |
| 6149 | LIST_INSERT_HEAD(APPUUIDHASH(uuid), new_mapping, chain); |
| 6150 | |
| 6151 | if (allocated_mapping) { |
| 6152 | *allocated_mapping = TRUE; |
| 6153 | } |
| 6154 | |
| 6155 | local_id = new_mapping->id; |
| 6156 | } |
| 6157 | |
| 6158 | return local_id; |
| 6159 | } |
| 6160 | |
| 6161 | static bool |
| 6162 | necp_remove_uuid_app_id_mapping(uuid_t uuid, bool *removed_mapping, bool uuid_policy_table) |
| 6163 | { |
| 6164 | struct necp_uuid_id_mapping *existing_mapping = NULL; |
| 6165 | |
| 6166 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 6167 | |
| 6168 | if (removed_mapping) { |
| 6169 | *removed_mapping = FALSE; |
| 6170 | } |
| 6171 | |
| 6172 | existing_mapping = necp_uuid_lookup_app_id_locked(uuid); |
| 6173 | if (existing_mapping != NULL) { |
| 6174 | if (uuid_policy_table) { |
| 6175 | existing_mapping->table_usecount--; |
| 6176 | } |
| 6177 | if (os_ref_release_locked(rc: &existing_mapping->refcount) == 0) { |
| 6178 | LIST_REMOVE(existing_mapping, chain); |
| 6179 | kfree_type(struct necp_uuid_id_mapping, existing_mapping); |
| 6180 | if (removed_mapping) { |
| 6181 | *removed_mapping = TRUE; |
| 6182 | } |
| 6183 | } |
| 6184 | return TRUE; |
| 6185 | } |
| 6186 | |
| 6187 | return FALSE; |
| 6188 | } |
| 6189 | |
| 6190 | static struct necp_uuid_id_mapping * |
| 6191 | necp_uuid_get_null_service_id_mapping(void) |
| 6192 | { |
| 6193 | static struct necp_uuid_id_mapping null_mapping; |
| 6194 | uuid_clear(uu: null_mapping.uuid); |
| 6195 | null_mapping.id = NECP_NULL_SERVICE_ID; |
| 6196 | |
| 6197 | return &null_mapping; |
| 6198 | } |
| 6199 | |
| 6200 | static struct necp_uuid_id_mapping * |
| 6201 | necp_uuid_lookup_service_id_locked(uuid_t uuid) |
| 6202 | { |
| 6203 | struct necp_uuid_id_mapping *searchentry = NULL; |
| 6204 | struct necp_uuid_id_mapping *foundentry = NULL; |
| 6205 | |
| 6206 | if (uuid_is_null(uu: uuid)) { |
| 6207 | return necp_uuid_get_null_service_id_mapping(); |
| 6208 | } |
| 6209 | |
| 6210 | LIST_FOREACH(searchentry, &necp_uuid_service_id_list, chain) { |
| 6211 | if (uuid_compare(uu1: searchentry->uuid, uu2: uuid) == 0) { |
| 6212 | foundentry = searchentry; |
| 6213 | break; |
| 6214 | } |
| 6215 | } |
| 6216 | |
| 6217 | return foundentry; |
| 6218 | } |
| 6219 | |
| 6220 | static struct necp_uuid_id_mapping * |
| 6221 | necp_uuid_lookup_uuid_with_service_id_locked(u_int32_t local_id) |
| 6222 | { |
| 6223 | struct necp_uuid_id_mapping *searchentry = NULL; |
| 6224 | struct necp_uuid_id_mapping *foundentry = NULL; |
| 6225 | |
| 6226 | if (local_id == NECP_NULL_SERVICE_ID) { |
| 6227 | return necp_uuid_get_null_service_id_mapping(); |
| 6228 | } |
| 6229 | |
| 6230 | LIST_FOREACH(searchentry, &necp_uuid_service_id_list, chain) { |
| 6231 | if (searchentry->id == local_id) { |
| 6232 | foundentry = searchentry; |
| 6233 | break; |
| 6234 | } |
| 6235 | } |
| 6236 | |
| 6237 | return foundentry; |
| 6238 | } |
| 6239 | |
| 6240 | static u_int32_t |
| 6241 | necp_create_uuid_service_id_mapping(uuid_t uuid) |
| 6242 | { |
| 6243 | u_int32_t local_id = 0; |
| 6244 | struct necp_uuid_id_mapping *existing_mapping = NULL; |
| 6245 | |
| 6246 | if (uuid_is_null(uu: uuid)) { |
| 6247 | return NECP_NULL_SERVICE_ID; |
| 6248 | } |
| 6249 | |
| 6250 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 6251 | |
| 6252 | existing_mapping = necp_uuid_lookup_service_id_locked(uuid); |
| 6253 | if (existing_mapping != NULL) { |
| 6254 | local_id = existing_mapping->id; |
| 6255 | os_ref_retain_locked(rc: &existing_mapping->refcount); |
| 6256 | } else { |
| 6257 | struct necp_uuid_id_mapping *new_mapping = NULL; |
| 6258 | new_mapping = kalloc_type(struct necp_uuid_id_mapping, |
| 6259 | Z_WAITOK | Z_NOFAIL); |
| 6260 | uuid_copy(dst: new_mapping->uuid, src: uuid); |
| 6261 | new_mapping->id = necp_get_new_uuid_id(true); |
| 6262 | os_ref_init(&new_mapping->refcount, &necp_refgrp); |
| 6263 | |
| 6264 | LIST_INSERT_HEAD(&necp_uuid_service_id_list, new_mapping, chain); |
| 6265 | |
| 6266 | local_id = new_mapping->id; |
| 6267 | } |
| 6268 | |
| 6269 | return local_id; |
| 6270 | } |
| 6271 | |
| 6272 | static bool |
| 6273 | necp_remove_uuid_service_id_mapping(uuid_t uuid) |
| 6274 | { |
| 6275 | struct necp_uuid_id_mapping *existing_mapping = NULL; |
| 6276 | |
| 6277 | if (uuid_is_null(uu: uuid)) { |
| 6278 | return TRUE; |
| 6279 | } |
| 6280 | |
| 6281 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 6282 | |
| 6283 | existing_mapping = necp_uuid_lookup_service_id_locked(uuid); |
| 6284 | if (existing_mapping != NULL) { |
| 6285 | if (os_ref_release_locked(rc: &existing_mapping->refcount) == 0) { |
| 6286 | LIST_REMOVE(existing_mapping, chain); |
| 6287 | kfree_type(struct necp_uuid_id_mapping, existing_mapping); |
| 6288 | } |
| 6289 | return TRUE; |
| 6290 | } |
| 6291 | |
| 6292 | return FALSE; |
| 6293 | } |
| 6294 | |
| 6295 | static bool |
| 6296 | necp_remove_uuid_service_id_mapping_with_service_id(u_int32_t service_id) |
| 6297 | { |
| 6298 | struct necp_uuid_id_mapping *existing_mapping = NULL; |
| 6299 | |
| 6300 | if (service_id == 0) { |
| 6301 | return TRUE; |
| 6302 | } |
| 6303 | |
| 6304 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 6305 | |
| 6306 | existing_mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: service_id); |
| 6307 | if (existing_mapping != NULL) { |
| 6308 | if (os_ref_release_locked(rc: &existing_mapping->refcount) == 0) { |
| 6309 | LIST_REMOVE(existing_mapping, chain); |
| 6310 | kfree_type(struct necp_uuid_id_mapping, existing_mapping); |
| 6311 | } |
| 6312 | return TRUE; |
| 6313 | } |
| 6314 | |
| 6315 | return FALSE; |
| 6316 | } |
| 6317 | |
| 6318 | static bool |
| 6319 | necp_kernel_socket_policies_update_uuid_table(void) |
| 6320 | { |
| 6321 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 6322 | |
| 6323 | if (necp_uuid_app_id_mappings_dirty) { |
| 6324 | if (proc_uuid_policy_kernel(PROC_UUID_POLICY_OPERATION_CLEAR, NULL, PROC_UUID_NECP_APP_POLICY) < 0) { |
| 6325 | NECPLOG0(LOG_DEBUG, "Error clearing uuids from policy table\n"); |
| 6326 | return FALSE; |
| 6327 | } |
| 6328 | |
| 6329 | if (necp_num_uuid_app_id_mappings > 0) { |
| 6330 | struct necp_uuid_id_mapping_head *uuid_list_head = NULL; |
| 6331 | for (uuid_list_head = &necp_uuid_app_id_hashtbl[necp_uuid_app_id_hash_num_buckets - 1]; uuid_list_head >= necp_uuid_app_id_hashtbl; uuid_list_head--) { |
| 6332 | struct necp_uuid_id_mapping *mapping = NULL; |
| 6333 | LIST_FOREACH(mapping, uuid_list_head, chain) { |
| 6334 | if (mapping->table_usecount > 0 && |
| 6335 | proc_uuid_policy_kernel(PROC_UUID_POLICY_OPERATION_ADD, uuid: mapping->uuid, PROC_UUID_NECP_APP_POLICY) < 0) { |
| 6336 | NECPLOG0(LOG_DEBUG, "Error adding uuid to policy table\n"); |
| 6337 | } |
| 6338 | } |
| 6339 | } |
| 6340 | } |
| 6341 | |
| 6342 | necp_uuid_app_id_mappings_dirty = FALSE; |
| 6343 | } |
| 6344 | |
| 6345 | return TRUE; |
| 6346 | } |
| 6347 | |
| 6348 | #define NECP_KERNEL_VALID_IP_OUTPUT_CONDITIONS (NECP_KERNEL_CONDITION_ALL_INTERFACES | NECP_KERNEL_CONDITION_BOUND_INTERFACE | NECP_KERNEL_CONDITION_PROTOCOL | NECP_KERNEL_CONDITION_LOCAL_START | NECP_KERNEL_CONDITION_LOCAL_END | NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_REMOTE_START | NECP_KERNEL_CONDITION_REMOTE_END | NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_POLICY_ID | NECP_KERNEL_CONDITION_LAST_INTERFACE | NECP_KERNEL_CONDITION_LOCAL_NETWORKS | NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS | NECP_KERNEL_CONDITION_SCHEME_PORT | NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) |
| 6349 | static necp_kernel_policy_id |
| 6350 | necp_kernel_ip_output_policy_add(necp_policy_order order, necp_policy_order suborder, u_int32_t session_order, int session_pid, u_int64_t condition_mask, u_int64_t condition_negated_mask, necp_kernel_policy_id cond_policy_id, ifnet_t cond_bound_interface, u_int32_t cond_last_interface_index, u_int16_t cond_protocol, union necp_sockaddr_union *cond_local_start, union necp_sockaddr_union *cond_local_end, u_int8_t cond_local_prefix, union necp_sockaddr_union *cond_remote_start, union necp_sockaddr_union *cond_remote_end, u_int8_t cond_remote_prefix, u_int16_t cond_packet_filter_tags, u_int16_t cond_scheme_port, u_int32_t cond_bound_interface_flags, u_int32_t cond_bound_interface_eflags, u_int32_t cond_bound_interface_xflags, necp_kernel_policy_result result, necp_kernel_policy_result_parameter result_parameter) |
| 6351 | { |
| 6352 | struct necp_kernel_ip_output_policy *new_kernel_policy = NULL; |
| 6353 | struct necp_kernel_ip_output_policy *tmp_kernel_policy = NULL; |
| 6354 | |
| 6355 | new_kernel_policy = zalloc_flags(necp_ip_policy_zone, Z_WAITOK | Z_ZERO); |
| 6356 | new_kernel_policy->id = necp_kernel_policy_get_new_id(false); |
| 6357 | new_kernel_policy->suborder = suborder; |
| 6358 | new_kernel_policy->order = order; |
| 6359 | new_kernel_policy->session_order = session_order; |
| 6360 | new_kernel_policy->session_pid = session_pid; |
| 6361 | |
| 6362 | // Sanitize condition mask |
| 6363 | new_kernel_policy->condition_mask = (condition_mask & NECP_KERNEL_VALID_IP_OUTPUT_CONDITIONS); |
| 6364 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE)) { |
| 6365 | new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_BOUND_INTERFACE; |
| 6366 | } |
| 6367 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS)) { |
| 6368 | new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS; |
| 6369 | } |
| 6370 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX)) { |
| 6371 | new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_LOCAL_PREFIX; |
| 6372 | } |
| 6373 | if ((new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) && (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX)) { |
| 6374 | new_kernel_policy->condition_mask &= ~NECP_KERNEL_CONDITION_REMOTE_PREFIX; |
| 6375 | } |
| 6376 | new_kernel_policy->condition_negated_mask = condition_negated_mask & new_kernel_policy->condition_mask; |
| 6377 | |
| 6378 | // Set condition values |
| 6379 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID) { |
| 6380 | new_kernel_policy->cond_policy_id = cond_policy_id; |
| 6381 | } |
| 6382 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) { |
| 6383 | if (cond_bound_interface) { |
| 6384 | ifnet_reference(interface: cond_bound_interface); |
| 6385 | } |
| 6386 | new_kernel_policy->cond_bound_interface = cond_bound_interface; |
| 6387 | } |
| 6388 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LAST_INTERFACE) { |
| 6389 | new_kernel_policy->cond_last_interface_index = cond_last_interface_index; |
| 6390 | } |
| 6391 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) { |
| 6392 | new_kernel_policy->cond_protocol = cond_protocol; |
| 6393 | } |
| 6394 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) { |
| 6395 | memcpy(dst: &new_kernel_policy->cond_local_start, src: cond_local_start, n: cond_local_start->sa.sa_len); |
| 6396 | } |
| 6397 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 6398 | memcpy(dst: &new_kernel_policy->cond_local_end, src: cond_local_end, n: cond_local_end->sa.sa_len); |
| 6399 | } |
| 6400 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) { |
| 6401 | new_kernel_policy->cond_local_prefix = cond_local_prefix; |
| 6402 | } |
| 6403 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) { |
| 6404 | memcpy(dst: &new_kernel_policy->cond_remote_start, src: cond_remote_start, n: cond_remote_start->sa.sa_len); |
| 6405 | } |
| 6406 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 6407 | memcpy(dst: &new_kernel_policy->cond_remote_end, src: cond_remote_end, n: cond_remote_end->sa.sa_len); |
| 6408 | } |
| 6409 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) { |
| 6410 | new_kernel_policy->cond_remote_prefix = cond_remote_prefix; |
| 6411 | } |
| 6412 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) { |
| 6413 | new_kernel_policy->cond_packet_filter_tags = cond_packet_filter_tags; |
| 6414 | } |
| 6415 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SCHEME_PORT) { |
| 6416 | new_kernel_policy->cond_scheme_port = cond_scheme_port; |
| 6417 | } |
| 6418 | if (new_kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) { |
| 6419 | new_kernel_policy->cond_bound_interface_flags = cond_bound_interface_flags; |
| 6420 | new_kernel_policy->cond_bound_interface_eflags = cond_bound_interface_eflags; |
| 6421 | new_kernel_policy->cond_bound_interface_xflags = cond_bound_interface_xflags; |
| 6422 | } |
| 6423 | new_kernel_policy->result = result; |
| 6424 | memcpy(dst: &new_kernel_policy->result_parameter, src: &result_parameter, n: sizeof(result_parameter)); |
| 6425 | |
| 6426 | if (necp_debug) { |
| 6427 | NECPLOG(LOG_DEBUG, "Added kernel policy: ip output, id=%d, mask=%llx\n", new_kernel_policy->id, new_kernel_policy->condition_mask); |
| 6428 | } |
| 6429 | LIST_INSERT_SORTED_THRICE_ASCENDING(&necp_kernel_ip_output_policies, new_kernel_policy, chain, session_order, order, suborder, tmp_kernel_policy); |
| 6430 | |
| 6431 | return new_kernel_policy ? new_kernel_policy->id : 0; |
| 6432 | } |
| 6433 | |
| 6434 | static struct necp_kernel_ip_output_policy * |
| 6435 | necp_kernel_ip_output_policy_find(necp_kernel_policy_id policy_id) |
| 6436 | { |
| 6437 | struct necp_kernel_ip_output_policy *kernel_policy = NULL; |
| 6438 | struct necp_kernel_ip_output_policy *tmp_kernel_policy = NULL; |
| 6439 | |
| 6440 | if (policy_id == 0) { |
| 6441 | return NULL; |
| 6442 | } |
| 6443 | |
| 6444 | LIST_FOREACH_SAFE(kernel_policy, &necp_kernel_ip_output_policies, chain, tmp_kernel_policy) { |
| 6445 | if (kernel_policy->id == policy_id) { |
| 6446 | return kernel_policy; |
| 6447 | } |
| 6448 | } |
| 6449 | |
| 6450 | return NULL; |
| 6451 | } |
| 6452 | |
| 6453 | static bool |
| 6454 | necp_kernel_ip_output_policy_delete(necp_kernel_policy_id policy_id) |
| 6455 | { |
| 6456 | struct necp_kernel_ip_output_policy *policy = NULL; |
| 6457 | |
| 6458 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 6459 | |
| 6460 | policy = necp_kernel_ip_output_policy_find(policy_id); |
| 6461 | if (policy) { |
| 6462 | LIST_REMOVE(policy, chain); |
| 6463 | |
| 6464 | if (policy->cond_bound_interface) { |
| 6465 | ifnet_release(interface: policy->cond_bound_interface); |
| 6466 | policy->cond_bound_interface = NULL; |
| 6467 | } |
| 6468 | |
| 6469 | zfree(necp_ip_policy_zone, policy); |
| 6470 | return TRUE; |
| 6471 | } |
| 6472 | |
| 6473 | return FALSE; |
| 6474 | } |
| 6475 | |
| 6476 | static void |
| 6477 | necp_kernel_ip_output_policies_dump_all(void) |
| 6478 | { |
| 6479 | if (necp_debug) { |
| 6480 | struct necp_kernel_ip_output_policy *policy = NULL; |
| 6481 | int policy_i; |
| 6482 | int id_i; |
| 6483 | char result_string[MAX_RESULT_STRING_LEN]; |
| 6484 | char proc_name_string[MAXCOMLEN + 1]; |
| 6485 | memset(s: result_string, c: 0, MAX_RESULT_STRING_LEN); |
| 6486 | memset(s: proc_name_string, c: 0, MAXCOMLEN + 1); |
| 6487 | |
| 6488 | NECPLOG0(LOG_DEBUG, "NECP IP Output Policies:\n"); |
| 6489 | NECPLOG0(LOG_DEBUG, "-----------\n"); |
| 6490 | for (id_i = 0; id_i < NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS; id_i++) { |
| 6491 | NECPLOG(LOG_DEBUG, " ID Bucket: %d\n", id_i); |
| 6492 | for (policy_i = 0; necp_kernel_ip_output_policies_map[id_i] != NULL && (necp_kernel_ip_output_policies_map[id_i])[policy_i] != NULL; policy_i++) { |
| 6493 | policy = (necp_kernel_ip_output_policies_map[id_i])[policy_i]; |
| 6494 | proc_name(pid: policy->session_pid, buf: proc_name_string, MAXCOMLEN); |
| 6495 | NECPLOG(LOG_DEBUG, "\t%3d. Policy ID: %5d\tProcess: %10.10s\tOrder: %04d.%04d.%d\tMask: %llx\tResult: %s\n", policy_i, policy->id, proc_name_string, policy->session_order, policy->order, policy->suborder, policy->condition_mask, necp_get_result_description(result_string, policy->result, policy->result_parameter)); |
| 6496 | } |
| 6497 | NECPLOG0(LOG_DEBUG, "-----------\n"); |
| 6498 | } |
| 6499 | } |
| 6500 | } |
| 6501 | |
| 6502 | static inline bool |
| 6503 | necp_kernel_ip_output_policy_results_overlap(struct necp_kernel_ip_output_policy *upper_policy, struct necp_kernel_ip_output_policy *lower_policy) |
| 6504 | { |
| 6505 | if (upper_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 6506 | if (upper_policy->session_order != lower_policy->session_order) { |
| 6507 | // A skip cannot override a policy of a different session |
| 6508 | return FALSE; |
| 6509 | } else { |
| 6510 | if (upper_policy->result_parameter.skip_policy_order == 0 || |
| 6511 | lower_policy->order >= upper_policy->result_parameter.skip_policy_order) { |
| 6512 | // This policy is beyond the skip |
| 6513 | return FALSE; |
| 6514 | } else { |
| 6515 | // This policy is inside the skip |
| 6516 | return TRUE; |
| 6517 | } |
| 6518 | } |
| 6519 | } |
| 6520 | |
| 6521 | // All other IP Output policy results (drop, tunnel, hard pass) currently overlap |
| 6522 | return TRUE; |
| 6523 | } |
| 6524 | |
| 6525 | static bool |
| 6526 | necp_kernel_ip_output_policy_is_unnecessary(struct necp_kernel_ip_output_policy *policy, struct necp_kernel_ip_output_policy **policy_array, int valid_indices) |
| 6527 | { |
| 6528 | bool can_skip = FALSE; |
| 6529 | u_int32_t highest_skip_session_order = 0; |
| 6530 | u_int32_t highest_skip_order = 0; |
| 6531 | int i; |
| 6532 | for (i = 0; i < valid_indices; i++) { |
| 6533 | struct necp_kernel_ip_output_policy *compared_policy = policy_array[i]; |
| 6534 | |
| 6535 | // For policies in a skip window, we can't mark conflicting policies as unnecessary |
| 6536 | if (can_skip) { |
| 6537 | if (highest_skip_session_order != compared_policy->session_order || |
| 6538 | (highest_skip_order != 0 && compared_policy->order >= highest_skip_order)) { |
| 6539 | // If we've moved on to the next session, or passed the skip window |
| 6540 | highest_skip_session_order = 0; |
| 6541 | highest_skip_order = 0; |
| 6542 | can_skip = FALSE; |
| 6543 | } else { |
| 6544 | // If this policy is also a skip, in can increase the skip window |
| 6545 | if (compared_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 6546 | if (compared_policy->result_parameter.skip_policy_order > highest_skip_order) { |
| 6547 | highest_skip_order = compared_policy->result_parameter.skip_policy_order; |
| 6548 | } |
| 6549 | } |
| 6550 | continue; |
| 6551 | } |
| 6552 | } |
| 6553 | |
| 6554 | if (compared_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 6555 | // This policy is a skip. Set the skip window accordingly |
| 6556 | can_skip = TRUE; |
| 6557 | highest_skip_session_order = compared_policy->session_order; |
| 6558 | highest_skip_order = compared_policy->result_parameter.skip_policy_order; |
| 6559 | } |
| 6560 | |
| 6561 | // The result of the compared policy must be able to block out this policy result |
| 6562 | if (!necp_kernel_ip_output_policy_results_overlap(upper_policy: compared_policy, lower_policy: policy)) { |
| 6563 | continue; |
| 6564 | } |
| 6565 | |
| 6566 | // If new policy matches All Interfaces, compared policy must also |
| 6567 | if ((policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES) && !(compared_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES)) { |
| 6568 | continue; |
| 6569 | } |
| 6570 | |
| 6571 | // If new policy matches Local Networks, compared policy must also |
| 6572 | if ((policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) && !(compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS)) { |
| 6573 | continue; |
| 6574 | } |
| 6575 | |
| 6576 | // Default makes lower policies unnecessary always |
| 6577 | if (compared_policy->condition_mask == 0) { |
| 6578 | return TRUE; |
| 6579 | } |
| 6580 | |
| 6581 | // Compared must be more general than policy, and include only conditions within policy |
| 6582 | if ((policy->condition_mask & compared_policy->condition_mask) != compared_policy->condition_mask) { |
| 6583 | continue; |
| 6584 | } |
| 6585 | |
| 6586 | // Negative conditions must match for the overlapping conditions |
| 6587 | if ((policy->condition_negated_mask & compared_policy->condition_mask) != (compared_policy->condition_negated_mask & compared_policy->condition_mask)) { |
| 6588 | continue; |
| 6589 | } |
| 6590 | |
| 6591 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID && |
| 6592 | compared_policy->cond_policy_id != policy->cond_policy_id) { |
| 6593 | continue; |
| 6594 | } |
| 6595 | |
| 6596 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE && |
| 6597 | compared_policy->cond_bound_interface != policy->cond_bound_interface) { |
| 6598 | continue; |
| 6599 | } |
| 6600 | |
| 6601 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_PROTOCOL && |
| 6602 | compared_policy->cond_protocol != policy->cond_protocol) { |
| 6603 | continue; |
| 6604 | } |
| 6605 | |
| 6606 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) { |
| 6607 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 6608 | if (!necp_is_range_in_range(inner_range_start: (struct sockaddr *)&policy->cond_local_start, inner_range_end: (struct sockaddr *)&policy->cond_local_end, range_start: (struct sockaddr *)&compared_policy->cond_local_start, range_end: (struct sockaddr *)&compared_policy->cond_local_end)) { |
| 6609 | continue; |
| 6610 | } |
| 6611 | } else if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) { |
| 6612 | if (compared_policy->cond_local_prefix > policy->cond_local_prefix || |
| 6613 | !necp_is_addr_in_subnet(addr: (struct sockaddr *)&policy->cond_local_start, subnet_addr: (struct sockaddr *)&compared_policy->cond_local_start, subnet_prefix: compared_policy->cond_local_prefix)) { |
| 6614 | continue; |
| 6615 | } |
| 6616 | } |
| 6617 | } |
| 6618 | |
| 6619 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) { |
| 6620 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 6621 | if (!necp_is_range_in_range(inner_range_start: (struct sockaddr *)&policy->cond_remote_start, inner_range_end: (struct sockaddr *)&policy->cond_remote_end, range_start: (struct sockaddr *)&compared_policy->cond_remote_start, range_end: (struct sockaddr *)&compared_policy->cond_remote_end)) { |
| 6622 | continue; |
| 6623 | } |
| 6624 | } else if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) { |
| 6625 | if (compared_policy->cond_remote_prefix > policy->cond_remote_prefix || |
| 6626 | !necp_is_addr_in_subnet(addr: (struct sockaddr *)&policy->cond_remote_start, subnet_addr: (struct sockaddr *)&compared_policy->cond_remote_start, subnet_prefix: compared_policy->cond_remote_prefix)) { |
| 6627 | continue; |
| 6628 | } |
| 6629 | } |
| 6630 | } |
| 6631 | |
| 6632 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_SCHEME_PORT && |
| 6633 | compared_policy->cond_scheme_port != policy->cond_scheme_port) { |
| 6634 | continue; |
| 6635 | } |
| 6636 | |
| 6637 | if (compared_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS && |
| 6638 | (compared_policy->cond_bound_interface_flags != policy->cond_bound_interface_flags || |
| 6639 | compared_policy->cond_bound_interface_eflags != policy->cond_bound_interface_eflags || |
| 6640 | compared_policy->cond_bound_interface_xflags != policy->cond_bound_interface_xflags)) { |
| 6641 | continue; |
| 6642 | } |
| 6643 | |
| 6644 | return TRUE; |
| 6645 | } |
| 6646 | |
| 6647 | return FALSE; |
| 6648 | } |
| 6649 | |
| 6650 | static bool |
| 6651 | necp_kernel_ip_output_policies_reprocess(void) |
| 6652 | { |
| 6653 | int i; |
| 6654 | int bucket_current_free_index[NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS]; |
| 6655 | struct necp_kernel_ip_output_policy *kernel_policy = NULL; |
| 6656 | |
| 6657 | LCK_RW_ASSERT(&necp_kernel_policy_lock, LCK_RW_ASSERT_EXCLUSIVE); |
| 6658 | |
| 6659 | // Reset mask to 0 |
| 6660 | necp_kernel_ip_output_policies_condition_mask = 0; |
| 6661 | necp_kernel_ip_output_policies_count = 0; |
| 6662 | necp_kernel_ip_output_policies_non_id_count = 0; |
| 6663 | |
| 6664 | for (i = 0; i < NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS; i++) { |
| 6665 | if (necp_kernel_ip_output_policies_map[i] != NULL) { |
| 6666 | kfree_type(struct necp_kernel_ip_output_policy *, |
| 6667 | necp_kernel_ip_output_policies_map_counts[i] + 1, |
| 6668 | necp_kernel_ip_output_policies_map[i]); |
| 6669 | necp_kernel_ip_output_policies_map[i] = NULL; |
| 6670 | } |
| 6671 | |
| 6672 | // Init counts |
| 6673 | necp_kernel_ip_output_policies_map_counts[i] = 0; |
| 6674 | } |
| 6675 | |
| 6676 | LIST_FOREACH(kernel_policy, &necp_kernel_ip_output_policies, chain) { |
| 6677 | // Update mask |
| 6678 | necp_kernel_ip_output_policies_condition_mask |= kernel_policy->condition_mask; |
| 6679 | necp_kernel_ip_output_policies_count++; |
| 6680 | |
| 6681 | /* Update bucket counts: |
| 6682 | * Non-id and SKIP policies will be added to all buckets |
| 6683 | * Add local networks policy to all buckets for incoming IP |
| 6684 | */ |
| 6685 | if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID) || |
| 6686 | (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) || |
| 6687 | kernel_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 6688 | for (i = 0; i < NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS; i++) { |
| 6689 | necp_kernel_ip_output_policies_map_counts[i]++; |
| 6690 | } |
| 6691 | } |
| 6692 | if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID)) { |
| 6693 | necp_kernel_ip_output_policies_non_id_count++; |
| 6694 | } else { |
| 6695 | necp_kernel_ip_output_policies_map_counts[NECP_IP_OUTPUT_MAP_ID_TO_BUCKET(kernel_policy->cond_policy_id)]++; |
| 6696 | } |
| 6697 | } |
| 6698 | |
| 6699 | for (i = 0; i < NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS; i++) { |
| 6700 | if (necp_kernel_ip_output_policies_map_counts[i] > 0) { |
| 6701 | // Allocate a NULL-terminated array of policy pointers for each bucket |
| 6702 | necp_kernel_ip_output_policies_map[i] = kalloc_type(struct necp_kernel_ip_output_policy *, |
| 6703 | necp_kernel_ip_output_policies_map_counts[i] + 1, Z_WAITOK | Z_ZERO); |
| 6704 | if (necp_kernel_ip_output_policies_map[i] == NULL) { |
| 6705 | goto fail; |
| 6706 | } |
| 6707 | } |
| 6708 | bucket_current_free_index[i] = 0; |
| 6709 | } |
| 6710 | |
| 6711 | u_int32_t current_session_order = 0; |
| 6712 | u_int32_t current_session_last_non_skip_policy = 0; |
| 6713 | |
| 6714 | LIST_FOREACH(kernel_policy, &necp_kernel_ip_output_policies, chain) { |
| 6715 | // For each new session, find the last non-skip policy. We can |
| 6716 | // avoid adding any skip policies that don't actually skip over |
| 6717 | // any non-skip policies. |
| 6718 | if (current_session_order != kernel_policy->session_order) { |
| 6719 | current_session_order = kernel_policy->session_order; |
| 6720 | current_session_last_non_skip_policy = 0; |
| 6721 | |
| 6722 | struct necp_kernel_ip_output_policy *inner_policy = NULL; |
| 6723 | LIST_FOREACH(inner_policy, &necp_kernel_ip_output_policies, chain) { |
| 6724 | if (inner_policy->session_order < current_session_order) { |
| 6725 | continue; |
| 6726 | } |
| 6727 | if (inner_policy->session_order > current_session_order) { |
| 6728 | break; |
| 6729 | } |
| 6730 | if (inner_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 6731 | continue; |
| 6732 | } |
| 6733 | |
| 6734 | current_session_last_non_skip_policy = inner_policy->order; |
| 6735 | } |
| 6736 | } |
| 6737 | |
| 6738 | if (kernel_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 6739 | if (current_session_last_non_skip_policy == 0) { |
| 6740 | // No useful policies to skip over, don't add |
| 6741 | continue; |
| 6742 | } |
| 6743 | if (kernel_policy->order >= current_session_last_non_skip_policy) { |
| 6744 | // Skip policy is after the last useful policy, don't add |
| 6745 | continue; |
| 6746 | } |
| 6747 | } |
| 6748 | |
| 6749 | // Insert pointers into map |
| 6750 | if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID) || |
| 6751 | (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) || |
| 6752 | kernel_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 6753 | for (i = 0; i < NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS; i++) { |
| 6754 | if (!necp_dedup_policies || !necp_kernel_ip_output_policy_is_unnecessary(policy: kernel_policy, policy_array: necp_kernel_ip_output_policies_map[i], valid_indices: bucket_current_free_index[i])) { |
| 6755 | (necp_kernel_ip_output_policies_map[i])[(bucket_current_free_index[i])] = kernel_policy; |
| 6756 | bucket_current_free_index[i]++; |
| 6757 | (necp_kernel_ip_output_policies_map[i])[(bucket_current_free_index[i])] = NULL; |
| 6758 | } |
| 6759 | } |
| 6760 | } else { |
| 6761 | i = NECP_IP_OUTPUT_MAP_ID_TO_BUCKET(kernel_policy->cond_policy_id); |
| 6762 | if (!necp_dedup_policies || !necp_kernel_ip_output_policy_is_unnecessary(policy: kernel_policy, policy_array: necp_kernel_ip_output_policies_map[i], valid_indices: bucket_current_free_index[i])) { |
| 6763 | (necp_kernel_ip_output_policies_map[i])[(bucket_current_free_index[i])] = kernel_policy; |
| 6764 | bucket_current_free_index[i]++; |
| 6765 | (necp_kernel_ip_output_policies_map[i])[(bucket_current_free_index[i])] = NULL; |
| 6766 | } |
| 6767 | } |
| 6768 | } |
| 6769 | |
| 6770 | if (bucket_current_free_index[0] == 0) { |
| 6771 | // No non-id policies were actually added |
| 6772 | necp_kernel_ip_output_policies_non_id_count = 0; |
| 6773 | |
| 6774 | // Also check if no policies at all were added |
| 6775 | bool policies_added = FALSE; |
| 6776 | for (i = 1; i < NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS; i++) { |
| 6777 | if (bucket_current_free_index[i] != 0) { |
| 6778 | policies_added = TRUE; |
| 6779 | break; |
| 6780 | } |
| 6781 | } |
| 6782 | if (!policies_added) { |
| 6783 | necp_kernel_ip_output_policies_condition_mask = 0; |
| 6784 | necp_kernel_ip_output_policies_count = 0; |
| 6785 | } |
| 6786 | } |
| 6787 | |
| 6788 | necp_kernel_ip_output_policies_dump_all(); |
| 6789 | return TRUE; |
| 6790 | |
| 6791 | fail: |
| 6792 | // Free memory, reset mask to 0 |
| 6793 | necp_kernel_ip_output_policies_condition_mask = 0; |
| 6794 | necp_kernel_ip_output_policies_count = 0; |
| 6795 | necp_kernel_ip_output_policies_non_id_count = 0; |
| 6796 | for (i = 0; i < NECP_KERNEL_IP_OUTPUT_POLICIES_MAP_NUM_ID_BUCKETS; i++) { |
| 6797 | if (necp_kernel_ip_output_policies_map[i] != NULL) { |
| 6798 | kfree_type(struct necp_kernel_ip_output_policy *, |
| 6799 | necp_kernel_ip_output_policies_map_counts[i] + 1, |
| 6800 | necp_kernel_ip_output_policies_map[i]); |
| 6801 | necp_kernel_ip_output_policies_map[i] = NULL; |
| 6802 | } |
| 6803 | } |
| 6804 | return FALSE; |
| 6805 | } |
| 6806 | |
| 6807 | // Outbound Policy Matching |
| 6808 | // --------------------- |
| 6809 | struct substring { |
| 6810 | char *string; |
| 6811 | size_t length; |
| 6812 | }; |
| 6813 | |
| 6814 | static struct substring |
| 6815 | necp_trim_dots_and_stars(char *string, size_t length) |
| 6816 | { |
| 6817 | struct substring sub; |
| 6818 | sub.string = string; |
| 6819 | sub.length = string ? length : 0; |
| 6820 | |
| 6821 | while (sub.length && (sub.string[0] == '.' || sub.string[0] == '*')) { |
| 6822 | sub.string++; |
| 6823 | sub.length--; |
| 6824 | } |
| 6825 | |
| 6826 | while (sub.length && (sub.string[sub.length - 1] == '.' || sub.string[sub.length - 1] == '*')) { |
| 6827 | sub.length--; |
| 6828 | } |
| 6829 | |
| 6830 | return sub; |
| 6831 | } |
| 6832 | |
| 6833 | static char * |
| 6834 | necp_create_trimmed_domain(char *string, size_t length) |
| 6835 | { |
| 6836 | char *trimmed_domain = NULL; |
| 6837 | struct substring sub = necp_trim_dots_and_stars(string, length); |
| 6838 | |
| 6839 | trimmed_domain = (char *)kalloc_data(sub.length + 1, Z_WAITOK); |
| 6840 | if (trimmed_domain == NULL) { |
| 6841 | return NULL; |
| 6842 | } |
| 6843 | |
| 6844 | memcpy(dst: trimmed_domain, src: sub.string, n: sub.length); |
| 6845 | trimmed_domain[sub.length] = 0; |
| 6846 | |
| 6847 | return trimmed_domain; |
| 6848 | } |
| 6849 | |
| 6850 | static inline int |
| 6851 | necp_count_dots(char *string, size_t length) |
| 6852 | { |
| 6853 | int dot_count = 0; |
| 6854 | size_t i = 0; |
| 6855 | |
| 6856 | for (i = 0; i < length; i++) { |
| 6857 | if (string[i] == '.') { |
| 6858 | dot_count++; |
| 6859 | } |
| 6860 | } |
| 6861 | |
| 6862 | return dot_count; |
| 6863 | } |
| 6864 | |
| 6865 | static bool |
| 6866 | necp_check_suffix(struct substring parent, struct substring suffix, bool require_dot_before_suffix) |
| 6867 | { |
| 6868 | if (parent.length <= suffix.length) { |
| 6869 | return FALSE; |
| 6870 | } |
| 6871 | |
| 6872 | size_t length_difference = (parent.length - suffix.length); |
| 6873 | |
| 6874 | if (require_dot_before_suffix) { |
| 6875 | if (((char *)(parent.string + length_difference - 1))[0] != '.') { |
| 6876 | return FALSE; |
| 6877 | } |
| 6878 | } |
| 6879 | |
| 6880 | // strncasecmp does case-insensitive check for all UTF-8 strings (ignores non-ASCII characters) |
| 6881 | return strncasecmp(s1: parent.string + length_difference, s2: suffix.string, n: suffix.length) == 0; |
| 6882 | } |
| 6883 | |
| 6884 | static bool |
| 6885 | necp_hostname_matches_domain(struct substring hostname_substring, u_int8_t hostname_dot_count, char *domain, u_int8_t domain_dot_count) |
| 6886 | { |
| 6887 | if (hostname_substring.string == NULL || domain == NULL) { |
| 6888 | return hostname_substring.string == domain; |
| 6889 | } |
| 6890 | |
| 6891 | struct substring domain_substring; |
| 6892 | domain_substring.string = domain; |
| 6893 | domain_substring.length = strlen(s: domain); |
| 6894 | |
| 6895 | if (hostname_dot_count == domain_dot_count) { |
| 6896 | // strncasecmp does case-insensitive check for all UTF-8 strings (ignores non-ASCII characters) |
| 6897 | if (hostname_substring.length == domain_substring.length && |
| 6898 | strncasecmp(s1: hostname_substring.string, s2: domain_substring.string, n: hostname_substring.length) == 0) { |
| 6899 | return TRUE; |
| 6900 | } |
| 6901 | } else if (domain_dot_count < hostname_dot_count) { |
| 6902 | if (necp_check_suffix(parent: hostname_substring, suffix: domain_substring, TRUE)) { |
| 6903 | return TRUE; |
| 6904 | } |
| 6905 | } |
| 6906 | |
| 6907 | return FALSE; |
| 6908 | } |
| 6909 | |
| 6910 | bool |
| 6911 | net_domain_contains_hostname(char *hostname_string, char *domain_string) |
| 6912 | { |
| 6913 | if (hostname_string == NULL || |
| 6914 | domain_string == NULL) { |
| 6915 | return false; |
| 6916 | } |
| 6917 | |
| 6918 | struct substring hostname_substring; |
| 6919 | hostname_substring.string = hostname_string; |
| 6920 | hostname_substring.length = strlen(s: hostname_string); |
| 6921 | |
| 6922 | return necp_hostname_matches_domain(hostname_substring, |
| 6923 | hostname_dot_count: necp_count_dots(string: hostname_string, length: hostname_substring.length), |
| 6924 | domain: domain_string, |
| 6925 | domain_dot_count: necp_count_dots(string: domain_string, length: strlen(s: domain_string))); |
| 6926 | } |
| 6927 | |
| 6928 | #define NECP_MAX_STRING_LEN 1024 |
| 6929 | |
| 6930 | static char * |
| 6931 | necp_copy_string(char *string, size_t length) |
| 6932 | { |
| 6933 | char *copied_string = NULL; |
| 6934 | |
| 6935 | if (length > NECP_MAX_STRING_LEN) { |
| 6936 | return NULL; |
| 6937 | } |
| 6938 | |
| 6939 | copied_string = (char *)kalloc_data(length + 1, Z_WAITOK); |
| 6940 | if (copied_string == NULL) { |
| 6941 | return NULL; |
| 6942 | } |
| 6943 | |
| 6944 | memcpy(dst: copied_string, src: string, n: length); |
| 6945 | copied_string[length] = 0; |
| 6946 | |
| 6947 | return copied_string; |
| 6948 | } |
| 6949 | |
| 6950 | static u_int32_t |
| 6951 | necp_get_primary_direct_interface_index(void) |
| 6952 | { |
| 6953 | u_int32_t interface_index = IFSCOPE_NONE; |
| 6954 | |
| 6955 | ifnet_head_lock_shared(); |
| 6956 | struct ifnet *ordered_interface = NULL; |
| 6957 | TAILQ_FOREACH(ordered_interface, &ifnet_ordered_head, if_ordered_link) { |
| 6958 | const u_int8_t functional_type = if_functional_type(ordered_interface, TRUE); |
| 6959 | if (functional_type != IFRTYPE_FUNCTIONAL_UNKNOWN && |
| 6960 | functional_type != IFRTYPE_FUNCTIONAL_LOOPBACK) { |
| 6961 | // All known, non-loopback functional types represent direct physical interfaces (Wi-Fi, Cellular, Wired) |
| 6962 | interface_index = ordered_interface->if_index; |
| 6963 | break; |
| 6964 | } |
| 6965 | } |
| 6966 | ifnet_head_done(); |
| 6967 | |
| 6968 | return interface_index; |
| 6969 | } |
| 6970 | |
| 6971 | static inline bool |
| 6972 | necp_task_has_match_entitlement(task_t task) |
| 6973 | { |
| 6974 | return task != NULL && |
| 6975 | (IOTaskHasEntitlement(task, entitlement: "com.apple.private.necp.match") || |
| 6976 | IOTaskHasEntitlement(task, entitlement: "com.apple.developer.CaptiveNetworkPlugin")); |
| 6977 | } |
| 6978 | |
| 6979 | static inline void |
| 6980 | necp_get_parent_is_entitled(task_t task, struct necp_socket_info *info) |
| 6981 | { |
| 6982 | coalition_t coal = task_get_coalition(task, COALITION_TYPE_JETSAM); |
| 6983 | |
| 6984 | if (coal == COALITION_NULL || coalition_is_leader(task, coal)) { |
| 6985 | // No parent, nothing to do |
| 6986 | return; |
| 6987 | } |
| 6988 | |
| 6989 | task_t lead_task = coalition_get_leader(coal); |
| 6990 | if (lead_task != NULL) { |
| 6991 | info->is_entitled = necp_task_has_match_entitlement(task: lead_task); |
| 6992 | task_deallocate(lead_task); |
| 6993 | } |
| 6994 | } |
| 6995 | |
| 6996 | // Some processes, due to particular entitlements, require using an NECP client to |
| 6997 | // access networking. Returns true if the result should be a Drop. |
| 6998 | static inline bool |
| 6999 | necp_check_missing_client_drop(proc_t proc, struct necp_socket_info *info) |
| 7000 | { |
| 7001 | if (necp_is_platform_binary(proc)) { |
| 7002 | // This check is currently for the "on-demand-install-capable" |
| 7003 | // entitlement, which by definition cannot be a built-in platform |
| 7004 | // binary. |
| 7005 | return false; |
| 7006 | } |
| 7007 | |
| 7008 | task_t task = proc_task(proc ? proc : current_proc()); |
| 7009 | |
| 7010 | if (!info->has_client && |
| 7011 | task != NULL && |
| 7012 | IOTaskHasEntitlement(task, entitlement: "com.apple.developer.on-demand-install-capable")) { |
| 7013 | // Drop connections that don't use NECP clients and have the |
| 7014 | // com.apple.developer.on-demand-install-capable entitlement. |
| 7015 | // This effectively restricts those processes to only using |
| 7016 | // an NECP-aware path for networking. |
| 7017 | return true; |
| 7018 | } else { |
| 7019 | return false; |
| 7020 | } |
| 7021 | } |
| 7022 | |
| 7023 | static inline bool |
| 7024 | necp_check_restricted_multicast_drop(proc_t proc, struct necp_socket_info *info, bool check_minor_version) |
| 7025 | { |
| 7026 | if (!necp_restrict_multicast || proc == NULL) { |
| 7027 | return false; |
| 7028 | } |
| 7029 | |
| 7030 | // Check for multicast/broadcast here |
| 7031 | if (info->remote_addr.sa.sa_family == AF_INET) { |
| 7032 | if (!IN_MULTICAST(ntohl(info->remote_addr.sin.sin_addr.s_addr)) && |
| 7033 | info->remote_addr.sin.sin_addr.s_addr != INADDR_BROADCAST) { |
| 7034 | return false; |
| 7035 | } |
| 7036 | } else if (info->remote_addr.sa.sa_family == AF_INET6) { |
| 7037 | if (!IN6_IS_ADDR_MULTICAST(&info->remote_addr.sin6.sin6_addr)) { |
| 7038 | return false; |
| 7039 | } |
| 7040 | } else { |
| 7041 | // Not IPv4/IPv6 |
| 7042 | return false; |
| 7043 | } |
| 7044 | |
| 7045 | if (necp_is_platform_binary(proc)) { |
| 7046 | return false; |
| 7047 | } |
| 7048 | |
| 7049 | const uint32_t platform = proc_platform(proc); |
| 7050 | const uint32_t sdk = proc_sdk(proc); |
| 7051 | |
| 7052 | // Enforce for iOS, linked on or after version 14 |
| 7053 | // If the caller set `check_minor_version`, only enforce starting at 14.5 |
| 7054 | if ((platform != PLATFORM_IOS || |
| 7055 | sdk == 0 || |
| 7056 | (sdk >> 16) < 14 || |
| 7057 | (check_minor_version && (sdk >> 16) == 14 && ((sdk >> 8) & 0xff) < 5))) { |
| 7058 | return false; |
| 7059 | } |
| 7060 | |
| 7061 | // Allow entitled processes to use multicast |
| 7062 | task_t task = proc_task(proc); |
| 7063 | if (task != NULL && |
| 7064 | IOTaskHasEntitlement(task, entitlement: "com.apple.developer.networking.multicast")) { |
| 7065 | return false; |
| 7066 | } |
| 7067 | |
| 7068 | const uint32_t min_sdk = proc_min_sdk(proc); |
| 7069 | NECPLOG(LOG_INFO, "Dropping unentitled multicast (SDK 0x%x, min 0x%x)", sdk, min_sdk); |
| 7070 | |
| 7071 | return true; |
| 7072 | } |
| 7073 | |
| 7074 | #define NECP_KERNEL_ADDRESS_TYPE_CONDITIONS (NECP_KERNEL_CONDITION_LOCAL_START | NECP_KERNEL_CONDITION_LOCAL_END | NECP_KERNEL_CONDITION_LOCAL_PREFIX | NECP_KERNEL_CONDITION_REMOTE_START | NECP_KERNEL_CONDITION_REMOTE_END | NECP_KERNEL_CONDITION_REMOTE_PREFIX | NECP_KERNEL_CONDITION_LOCAL_EMPTY | NECP_KERNEL_CONDITION_REMOTE_EMPTY | NECP_KERNEL_CONDITION_LOCAL_NETWORKS | NECP_KERNEL_CONDITION_SCHEME_PORT) |
| 7075 | static void |
| 7076 | necp_application_fillout_info_locked(task_t task, uuid_t application_uuid, uuid_t real_application_uuid, uuid_t responsible_application_uuid, char *account, char *domain, char *url, pid_t pid, int32_t pid_version, uid_t uid, uid_t real_uid, u_int16_t protocol, u_int32_t bound_interface_index, u_int32_t traffic_class, union necp_sockaddr_union *local_addr, union necp_sockaddr_union *remote_addr, u_int16_t local_port, u_int16_t remote_port, bool has_client, bool has_system_signed_result, proc_t real_proc, proc_t proc, proc_t responsible_proc, u_int32_t drop_order, u_int32_t client_flags, u_int16_t scheme_port, struct necp_socket_info *info, bool is_loopback, bool is_delegated) |
| 7077 | { |
| 7078 | memset(s: info, c: 0, n: sizeof(struct necp_socket_info)); |
| 7079 | |
| 7080 | info->pid = pid; |
| 7081 | info->pid_version = pid_version; |
| 7082 | info->uid = uid; |
| 7083 | info->real_uid = real_uid; |
| 7084 | info->protocol = protocol; |
| 7085 | info->bound_interface_index = bound_interface_index; |
| 7086 | info->traffic_class = traffic_class; |
| 7087 | info->has_client = has_client; |
| 7088 | info->has_system_signed_result = has_system_signed_result; |
| 7089 | info->drop_order = drop_order; |
| 7090 | info->client_flags = client_flags; |
| 7091 | info->is_loopback = is_loopback; |
| 7092 | info->is_delegated = is_delegated; |
| 7093 | |
| 7094 | if ((necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) && |
| 7095 | info->bound_interface_index != IFSCOPE_NONE) { |
| 7096 | ifnet_head_lock_shared(); |
| 7097 | ifnet_t interface = ifindex2ifnet[info->bound_interface_index]; |
| 7098 | if (interface != NULL) { |
| 7099 | info->bound_interface_flags = interface->if_flags; |
| 7100 | info->bound_interface_eflags = interface->if_eflags; |
| 7101 | info->bound_interface_xflags = interface->if_xflags; |
| 7102 | } |
| 7103 | ifnet_head_done(); |
| 7104 | } |
| 7105 | |
| 7106 | if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_APP_ID && !uuid_is_null(uu: application_uuid)) { |
| 7107 | struct necp_uuid_id_mapping *existing_mapping = necp_uuid_lookup_app_id_locked(uuid: application_uuid); |
| 7108 | if (existing_mapping) { |
| 7109 | info->application_id = existing_mapping->id; |
| 7110 | } |
| 7111 | } |
| 7112 | |
| 7113 | if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID && !uuid_is_null(uu: real_application_uuid)) { |
| 7114 | if (uuid_compare(uu1: application_uuid, uu2: real_application_uuid) == 0) { |
| 7115 | info->real_application_id = info->application_id; |
| 7116 | } else { |
| 7117 | struct necp_uuid_id_mapping *existing_mapping = necp_uuid_lookup_app_id_locked(uuid: real_application_uuid); |
| 7118 | if (existing_mapping) { |
| 7119 | info->real_application_id = existing_mapping->id; |
| 7120 | } |
| 7121 | } |
| 7122 | } |
| 7123 | |
| 7124 | if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_APP_ID && !uuid_is_null(uu: responsible_application_uuid)) { |
| 7125 | struct necp_uuid_id_mapping *existing_mapping = necp_uuid_lookup_app_id_locked(uuid: responsible_application_uuid); |
| 7126 | if (existing_mapping != NULL) { |
| 7127 | info->real_application_id = info->application_id; |
| 7128 | info->application_id = existing_mapping->id; |
| 7129 | info->used_responsible_pid = true; |
| 7130 | } |
| 7131 | } |
| 7132 | |
| 7133 | if (info->used_responsible_pid) { |
| 7134 | proc = responsible_proc; |
| 7135 | } |
| 7136 | |
| 7137 | if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT && proc != NULL) { |
| 7138 | info->is_entitled = necp_task_has_match_entitlement(task); |
| 7139 | if (!info->is_entitled) { |
| 7140 | // Task does not have entitlement, check the parent task |
| 7141 | necp_get_parent_is_entitled(task, info); |
| 7142 | } |
| 7143 | } |
| 7144 | |
| 7145 | if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY && proc != NULL) { |
| 7146 | info->is_platform_binary = necp_is_platform_binary(proc) ? true : false; |
| 7147 | } |
| 7148 | |
| 7149 | if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY && real_proc != NULL) { |
| 7150 | info->real_is_platform_binary = (necp_is_platform_binary(proc: real_proc) ? true : false); |
| 7151 | } |
| 7152 | |
| 7153 | if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID && account != NULL) { |
| 7154 | struct necp_string_id_mapping *existing_mapping = necp_lookup_string_to_id_locked(list: &necp_account_id_list, string: account); |
| 7155 | if (existing_mapping) { |
| 7156 | info->account_id = existing_mapping->id; |
| 7157 | } |
| 7158 | } |
| 7159 | |
| 7160 | if ((necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_DOMAIN) || |
| 7161 | (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_EXACT_DOMAIN) || |
| 7162 | (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_DOMAIN_FILTER)) { |
| 7163 | info->domain = domain; |
| 7164 | } |
| 7165 | |
| 7166 | if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_URL) { |
| 7167 | info->url = url; |
| 7168 | } |
| 7169 | |
| 7170 | if ((necp_data_tracing_level && necp_data_tracing_port) || |
| 7171 | necp_restrict_multicast || |
| 7172 | (necp_kernel_application_policies_condition_mask & NECP_KERNEL_ADDRESS_TYPE_CONDITIONS)) { |
| 7173 | if (local_addr && local_addr->sa.sa_len > 0) { |
| 7174 | memcpy(dst: &info->local_addr, src: local_addr, n: local_addr->sa.sa_len); |
| 7175 | if (local_port != 0) { |
| 7176 | info->local_addr.sin6.sin6_port = local_port; |
| 7177 | } |
| 7178 | } else { |
| 7179 | if (remote_addr && remote_addr->sa.sa_len > 0) { |
| 7180 | info->local_addr.sa.sa_family = remote_addr->sa.sa_family; |
| 7181 | info->local_addr.sa.sa_len = remote_addr->sa.sa_len; |
| 7182 | } else { |
| 7183 | info->local_addr.sin6.sin6_family = AF_INET6; |
| 7184 | info->local_addr.sin6.sin6_len = sizeof(struct sockaddr_in6); |
| 7185 | } |
| 7186 | if (local_port != 0) { |
| 7187 | info->local_addr.sin6.sin6_port = local_port; |
| 7188 | } |
| 7189 | } |
| 7190 | if (remote_addr && remote_addr->sa.sa_len > 0) { |
| 7191 | memcpy(dst: &info->remote_addr, src: remote_addr, n: remote_addr->sa.sa_len); |
| 7192 | if (remote_port != 0) { |
| 7193 | info->remote_addr.sin6.sin6_port = remote_port; |
| 7194 | } |
| 7195 | } else if (remote_port != 0) { |
| 7196 | info->remote_addr.sin6.sin6_len = sizeof(struct sockaddr_in6); |
| 7197 | info->remote_addr.sin6.sin6_family = AF_INET6; |
| 7198 | info->remote_addr.sin6.sin6_port = remote_port; |
| 7199 | } |
| 7200 | } |
| 7201 | |
| 7202 | if (necp_kernel_application_policies_condition_mask & NECP_KERNEL_CONDITION_SCHEME_PORT) { |
| 7203 | info->scheme_port = scheme_port; |
| 7204 | } |
| 7205 | } |
| 7206 | |
| 7207 | static void |
| 7208 | necp_send_application_interface_denied_event(pid_t pid, uuid_t proc_uuid, u_int32_t if_functional_type) |
| 7209 | { |
| 7210 | struct kev_netpolicy_ifdenied ev_ifdenied; |
| 7211 | |
| 7212 | bzero(s: &ev_ifdenied, n: sizeof(ev_ifdenied)); |
| 7213 | |
| 7214 | ev_ifdenied.ev_data.epid = pid; |
| 7215 | uuid_copy(dst: ev_ifdenied.ev_data.euuid, src: proc_uuid); |
| 7216 | ev_ifdenied.ev_if_functional_type = if_functional_type; |
| 7217 | |
| 7218 | netpolicy_post_msg(KEV_NETPOLICY_IFDENIED, &ev_ifdenied.ev_data, sizeof(ev_ifdenied)); |
| 7219 | } |
| 7220 | |
| 7221 | static void |
| 7222 | necp_send_network_denied_event(pid_t pid, uuid_t proc_uuid, u_int32_t network_type) |
| 7223 | { |
| 7224 | struct kev_netpolicy_netdenied ev_netdenied = {}; |
| 7225 | |
| 7226 | bzero(s: &ev_netdenied, n: sizeof(ev_netdenied)); |
| 7227 | |
| 7228 | ev_netdenied.ev_data.epid = pid; |
| 7229 | uuid_copy(dst: ev_netdenied.ev_data.euuid, src: proc_uuid); |
| 7230 | ev_netdenied.ev_network_type = network_type; |
| 7231 | |
| 7232 | netpolicy_post_msg(KEV_NETPOLICY_NETDENIED, &ev_netdenied.ev_data, sizeof(ev_netdenied)); |
| 7233 | } |
| 7234 | |
| 7235 | extern char *proc_name_address(void *p); |
| 7236 | |
| 7237 | #define NECP_VERIFY_DELEGATION_ENTITLEMENT(_p, _c, _d) \ |
| 7238 | if (!has_checked_delegation_entitlement) { \ |
| 7239 | has_delegation_entitlement = (priv_check_cred(_c, PRIV_NET_PRIVILEGED_SOCKET_DELEGATE, 0) == 0); \ |
| 7240 | has_checked_delegation_entitlement = TRUE; \ |
| 7241 | } \ |
| 7242 | if (!has_delegation_entitlement) { \ |
| 7243 | NECPLOG(LOG_ERR, "%s(%d) does not hold the necessary entitlement to delegate network traffic for other processes by %s", \ |
| 7244 | proc_name_address(_p), proc_pid(_p), _d); \ |
| 7245 | break; \ |
| 7246 | } |
| 7247 | |
| 7248 | int |
| 7249 | necp_application_find_policy_match_internal(proc_t proc, |
| 7250 | u_int8_t *parameters, |
| 7251 | u_int32_t parameters_size, |
| 7252 | struct necp_aggregate_result *returned_result, |
| 7253 | u_int32_t *flags, |
| 7254 | u_int32_t *reason, |
| 7255 | u_int required_interface_index, |
| 7256 | const union necp_sockaddr_union *override_local_addr, |
| 7257 | const union necp_sockaddr_union *override_remote_addr, |
| 7258 | struct necp_client_endpoint *returned_v4_gateway, |
| 7259 | struct necp_client_endpoint *returned_v6_gateway, |
| 7260 | struct rtentry **returned_route, bool ignore_address, |
| 7261 | bool has_client, |
| 7262 | uuid_t *returned_override_euuid) |
| 7263 | { |
| 7264 | int error = 0; |
| 7265 | size_t offset = 0; |
| 7266 | |
| 7267 | struct necp_kernel_socket_policy *matched_policy = NULL; |
| 7268 | struct necp_socket_info info = {}; |
| 7269 | necp_kernel_policy_filter filter_control_unit = 0; |
| 7270 | necp_kernel_policy_result service_action = 0; |
| 7271 | necp_kernel_policy_service service = { 0, 0 }; |
| 7272 | |
| 7273 | u_int16_t protocol = 0; |
| 7274 | u_int32_t bound_interface_index = required_interface_index; |
| 7275 | u_int32_t traffic_class = 0; |
| 7276 | u_int32_t client_flags = 0; |
| 7277 | u_int16_t scheme_port = 0; |
| 7278 | union necp_sockaddr_union local_addr; |
| 7279 | union necp_sockaddr_union remote_addr; |
| 7280 | bool no_remote_addr = FALSE; |
| 7281 | u_int8_t remote_family = 0; |
| 7282 | bool no_local_addr = FALSE; |
| 7283 | u_int16_t local_port = 0; |
| 7284 | u_int16_t remote_port = 0; |
| 7285 | u_int32_t remote_endpoint_type = 0; |
| 7286 | bool remote_address_is_empty = false; |
| 7287 | necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE; |
| 7288 | bool is_delegated = false; |
| 7289 | |
| 7290 | if (override_local_addr) { |
| 7291 | memcpy(dst: &local_addr, src: override_local_addr, n: sizeof(local_addr)); |
| 7292 | } else { |
| 7293 | memset(s: &local_addr, c: 0, n: sizeof(local_addr)); |
| 7294 | } |
| 7295 | if (override_remote_addr) { |
| 7296 | memcpy(dst: &remote_addr, src: override_remote_addr, n: sizeof(remote_addr)); |
| 7297 | } else { |
| 7298 | memset(s: &remote_addr, c: 0, n: sizeof(remote_addr)); |
| 7299 | } |
| 7300 | |
| 7301 | // Initialize UID, PID, and UUIDs to the current process |
| 7302 | uid_t uid = 0; |
| 7303 | uid_t real_uid = 0; |
| 7304 | kauth_cred_t cred = kauth_cred_proc_ref(procp: proc); |
| 7305 | if (cred != NULL) { |
| 7306 | uid = kauth_cred_getuid(cred: cred); |
| 7307 | real_uid = uid; |
| 7308 | } |
| 7309 | task_t task = proc_task(proc); |
| 7310 | pid_t pid = proc_pid(proc); |
| 7311 | int32_t pid_version = proc_pidversion(proc); |
| 7312 | uuid_t application_uuid; |
| 7313 | uuid_clear(uu: application_uuid); |
| 7314 | uuid_t real_application_uuid; |
| 7315 | uuid_clear(uu: real_application_uuid); |
| 7316 | proc_getexecutableuuid(proc, real_application_uuid, sizeof(real_application_uuid)); |
| 7317 | uuid_copy(dst: application_uuid, src: real_application_uuid); |
| 7318 | uuid_t responsible_application_uuid; |
| 7319 | uuid_clear(uu: responsible_application_uuid); |
| 7320 | |
| 7321 | char *domain = NULL; |
| 7322 | char *url = NULL; |
| 7323 | char *account = NULL; |
| 7324 | |
| 7325 | #define NECP_MAX_REQUIRED_AGENTS 16 |
| 7326 | u_int32_t num_required_agent_types = 0; |
| 7327 | struct necp_client_parameter_netagent_type required_agent_types[NECP_MAX_REQUIRED_AGENTS]; |
| 7328 | memset(s: &required_agent_types, c: 0, n: sizeof(required_agent_types)); |
| 7329 | |
| 7330 | u_int32_t netagent_ids[NECP_MAX_NETAGENTS]; |
| 7331 | u_int32_t netagent_use_flags[NECP_MAX_NETAGENTS]; |
| 7332 | memset(s: &netagent_ids, c: 0, n: sizeof(netagent_ids)); |
| 7333 | memset(s: &netagent_use_flags, c: 0, n: sizeof(netagent_use_flags)); |
| 7334 | int netagent_cursor; |
| 7335 | |
| 7336 | bool has_checked_delegation_entitlement = false; |
| 7337 | bool has_delegation_entitlement = false; |
| 7338 | bool has_system_signed_result = false; |
| 7339 | |
| 7340 | proc_t responsible_proc = PROC_NULL; |
| 7341 | proc_t effective_proc = proc; |
| 7342 | bool release_eproc = false; |
| 7343 | necp_socket_bypass_type_t bypass_type = NECP_BYPASS_TYPE_NONE; |
| 7344 | |
| 7345 | u_int32_t flow_divert_aggregate_unit = 0; |
| 7346 | |
| 7347 | if (returned_result == NULL) { |
| 7348 | if (cred != NULL) { |
| 7349 | kauth_cred_unref(&cred); |
| 7350 | } |
| 7351 | return EINVAL; |
| 7352 | } |
| 7353 | |
| 7354 | if (returned_v4_gateway != NULL) { |
| 7355 | memset(s: returned_v4_gateway, c: 0, n: sizeof(struct necp_client_endpoint)); |
| 7356 | } |
| 7357 | |
| 7358 | if (returned_v6_gateway != NULL) { |
| 7359 | memset(s: returned_v6_gateway, c: 0, n: sizeof(struct necp_client_endpoint)); |
| 7360 | } |
| 7361 | |
| 7362 | if (returned_override_euuid != NULL) { |
| 7363 | uuid_clear(uu: *returned_override_euuid); |
| 7364 | } |
| 7365 | |
| 7366 | memset(s: returned_result, c: 0, n: sizeof(struct necp_aggregate_result)); |
| 7367 | |
| 7368 | u_int32_t drop_order = necp_process_drop_order(cred); |
| 7369 | |
| 7370 | necp_kernel_policy_result drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE; |
| 7371 | |
| 7372 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 7373 | if (necp_kernel_application_policies_count == 0 && necp_drop_management_order == 0) { |
| 7374 | if (necp_drop_all_order > 0 || drop_order > 0) { |
| 7375 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 7376 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 7377 | if (cred != NULL) { |
| 7378 | kauth_cred_unref(&cred); |
| 7379 | } |
| 7380 | return 0; |
| 7381 | } |
| 7382 | } |
| 7383 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 7384 | |
| 7385 | while ((offset + sizeof(u_int8_t) + sizeof(u_int32_t)) <= parameters_size) { |
| 7386 | u_int8_t type = necp_buffer_get_tlv_type(buffer: parameters, tlv_offset: offset); |
| 7387 | u_int32_t length = necp_buffer_get_tlv_length(buffer: parameters, tlv_offset: offset); |
| 7388 | |
| 7389 | if (length > (parameters_size - (offset + sizeof(u_int8_t) + sizeof(u_int32_t)))) { |
| 7390 | // If the length is larger than what can fit in the remaining parameters size, bail |
| 7391 | NECPLOG(LOG_ERR, "Invalid TLV length (%u)", length); |
| 7392 | break; |
| 7393 | } |
| 7394 | |
| 7395 | if (length > 0) { |
| 7396 | u_int8_t *value = necp_buffer_get_tlv_value(buffer: parameters, tlv_offset: offset, NULL); |
| 7397 | if (value != NULL) { |
| 7398 | switch (type) { |
| 7399 | case NECP_CLIENT_PARAMETER_APPLICATION: { |
| 7400 | if (length >= sizeof(uuid_t)) { |
| 7401 | if (uuid_compare(uu1: application_uuid, uu2: value) == 0) { |
| 7402 | // No delegation |
| 7403 | break; |
| 7404 | } |
| 7405 | |
| 7406 | NECP_VERIFY_DELEGATION_ENTITLEMENT(proc, cred, "euuid"); |
| 7407 | |
| 7408 | is_delegated = true; |
| 7409 | uuid_copy(dst: application_uuid, src: value); |
| 7410 | } |
| 7411 | break; |
| 7412 | } |
| 7413 | case NECP_CLIENT_PARAMETER_REAL_APPLICATION: { |
| 7414 | if (length >= sizeof(uuid_t)) { |
| 7415 | if (uuid_compare(uu1: real_application_uuid, uu2: value) == 0) { |
| 7416 | // No delegation |
| 7417 | break; |
| 7418 | } |
| 7419 | |
| 7420 | NECP_VERIFY_DELEGATION_ENTITLEMENT(proc, cred, "uuid"); |
| 7421 | |
| 7422 | is_delegated = true; |
| 7423 | uuid_copy(dst: real_application_uuid, src: value); |
| 7424 | } |
| 7425 | break; |
| 7426 | } |
| 7427 | case NECP_CLIENT_PARAMETER_PID: { |
| 7428 | if (length >= sizeof(pid_t)) { |
| 7429 | if (memcmp(s1: &pid, s2: value, n: sizeof(pid_t)) == 0) { |
| 7430 | // No delegation |
| 7431 | break; |
| 7432 | } |
| 7433 | |
| 7434 | NECP_VERIFY_DELEGATION_ENTITLEMENT(proc, cred, "pid"); |
| 7435 | |
| 7436 | is_delegated = true; |
| 7437 | memcpy(dst: &pid, src: value, n: sizeof(pid_t)); |
| 7438 | } |
| 7439 | break; |
| 7440 | } |
| 7441 | case NECP_CLIENT_PARAMETER_UID: { |
| 7442 | if (length >= sizeof(uid_t)) { |
| 7443 | if (memcmp(s1: &uid, s2: value, n: sizeof(uid_t)) == 0) { |
| 7444 | // No delegation |
| 7445 | break; |
| 7446 | } |
| 7447 | |
| 7448 | NECP_VERIFY_DELEGATION_ENTITLEMENT(proc, cred, "uid"); |
| 7449 | |
| 7450 | is_delegated = true; |
| 7451 | memcpy(dst: &uid, src: value, n: sizeof(uid_t)); |
| 7452 | } |
| 7453 | break; |
| 7454 | } |
| 7455 | case NECP_CLIENT_PARAMETER_DOMAIN: { |
| 7456 | domain = (char *)value; |
| 7457 | domain[length - 1] = 0; |
| 7458 | break; |
| 7459 | } |
| 7460 | case NECP_CLIENT_PARAMETER_URL: { |
| 7461 | url = (char *)value; |
| 7462 | url[length - 1] = 0; |
| 7463 | break; |
| 7464 | } |
| 7465 | case NECP_CLIENT_PARAMETER_ACCOUNT: { |
| 7466 | account = (char *)value; |
| 7467 | account[length - 1] = 0; |
| 7468 | break; |
| 7469 | } |
| 7470 | case NECP_CLIENT_PARAMETER_TRAFFIC_CLASS: { |
| 7471 | if (length >= sizeof(u_int32_t)) { |
| 7472 | memcpy(dst: &traffic_class, src: value, n: sizeof(u_int32_t)); |
| 7473 | } |
| 7474 | break; |
| 7475 | } |
| 7476 | case NECP_CLIENT_PARAMETER_IP_PROTOCOL: { |
| 7477 | if (length >= sizeof(u_int16_t)) { |
| 7478 | memcpy(dst: &protocol, src: value, n: sizeof(u_int16_t)); |
| 7479 | } else if (length >= sizeof(u_int8_t)) { |
| 7480 | memcpy(dst: &protocol, src: value, n: sizeof(u_int8_t)); |
| 7481 | } |
| 7482 | break; |
| 7483 | } |
| 7484 | case NECP_CLIENT_PARAMETER_BOUND_INTERFACE: { |
| 7485 | if (length <= IFXNAMSIZ && length > 0) { |
| 7486 | ifnet_t bound_interface = NULL; |
| 7487 | char interface_name[IFXNAMSIZ]; |
| 7488 | memcpy(dst: interface_name, src: value, n: length); |
| 7489 | interface_name[length - 1] = 0; // Make sure the string is NULL terminated |
| 7490 | if (ifnet_find_by_name(ifname: interface_name, interface: &bound_interface) == 0) { |
| 7491 | bound_interface_index = bound_interface->if_index; |
| 7492 | ifnet_release(interface: bound_interface); |
| 7493 | } |
| 7494 | } |
| 7495 | break; |
| 7496 | } |
| 7497 | case NECP_CLIENT_PARAMETER_LOCAL_ADDRESS: { |
| 7498 | if (ignore_address || override_local_addr) { |
| 7499 | break; |
| 7500 | } |
| 7501 | |
| 7502 | if (length >= sizeof(struct necp_policy_condition_addr)) { |
| 7503 | struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value; |
| 7504 | if (necp_address_is_valid(&address_struct->address.sa)) { |
| 7505 | memcpy(dst: &local_addr, src: &address_struct->address, n: sizeof(address_struct->address)); |
| 7506 | } |
| 7507 | } |
| 7508 | break; |
| 7509 | } |
| 7510 | case NECP_CLIENT_PARAMETER_REMOTE_ADDRESS: { |
| 7511 | if (ignore_address || override_remote_addr) { |
| 7512 | break; |
| 7513 | } |
| 7514 | |
| 7515 | if (length >= sizeof(struct necp_policy_condition_addr)) { |
| 7516 | struct necp_policy_condition_addr *address_struct = (struct necp_policy_condition_addr *)(void *)value; |
| 7517 | if (necp_address_is_valid(&address_struct->address.sa)) { |
| 7518 | memcpy(dst: &remote_addr, src: &address_struct->address, n: sizeof(address_struct->address)); |
| 7519 | } |
| 7520 | } |
| 7521 | break; |
| 7522 | } |
| 7523 | case NECP_CLIENT_PARAMETER_LOCAL_ENDPOINT: { |
| 7524 | if (ignore_address || override_local_addr) { |
| 7525 | break; |
| 7526 | } |
| 7527 | |
| 7528 | if (length >= sizeof(struct necp_client_endpoint)) { |
| 7529 | struct necp_client_endpoint *endpoint = (struct necp_client_endpoint *)(void *)value; |
| 7530 | if (endpoint->u.endpoint.endpoint_family == AF_UNSPEC && |
| 7531 | endpoint->u.endpoint.endpoint_port != 0) { |
| 7532 | // Save port |
| 7533 | local_port = endpoint->u.endpoint.endpoint_port; |
| 7534 | } |
| 7535 | } |
| 7536 | break; |
| 7537 | } |
| 7538 | case NECP_CLIENT_PARAMETER_REMOTE_ENDPOINT: { |
| 7539 | if (ignore_address || override_remote_addr) { |
| 7540 | break; |
| 7541 | } |
| 7542 | |
| 7543 | if (length >= sizeof(struct necp_client_endpoint)) { |
| 7544 | struct necp_client_endpoint *endpoint = (struct necp_client_endpoint *)(void *)value; |
| 7545 | if (endpoint->u.endpoint.endpoint_family == AF_UNSPEC) { |
| 7546 | remote_endpoint_type = endpoint->u.endpoint.endpoint_type; |
| 7547 | if (endpoint->u.endpoint.endpoint_port != 0) { |
| 7548 | // Save port |
| 7549 | remote_port = endpoint->u.endpoint.endpoint_port; |
| 7550 | } |
| 7551 | } else if (necp_addr_is_empty(addr: &endpoint->u.sa)) { |
| 7552 | remote_address_is_empty = true; |
| 7553 | } |
| 7554 | } |
| 7555 | break; |
| 7556 | } |
| 7557 | case NECP_CLIENT_PARAMETER_FLAGS: { |
| 7558 | if (length >= sizeof(client_flags)) { |
| 7559 | memcpy(dst: &client_flags, src: value, n: sizeof(client_flags)); |
| 7560 | } |
| 7561 | break; |
| 7562 | } |
| 7563 | case NECP_CLIENT_PARAMETER_REQUIRE_AGENT_TYPE: |
| 7564 | case NECP_CLIENT_PARAMETER_PREFER_AGENT_TYPE: { |
| 7565 | if (num_required_agent_types >= NECP_MAX_REQUIRED_AGENTS) { |
| 7566 | break; |
| 7567 | } |
| 7568 | if (length >= sizeof(struct necp_client_parameter_netagent_type)) { |
| 7569 | memcpy(dst: &required_agent_types[num_required_agent_types], src: value, n: sizeof(struct necp_client_parameter_netagent_type)); |
| 7570 | num_required_agent_types++; |
| 7571 | } |
| 7572 | break; |
| 7573 | } |
| 7574 | case NECP_CLIENT_PARAMETER_SCHEME_PORT: { |
| 7575 | if (length >= sizeof(scheme_port)) { |
| 7576 | memcpy(dst: &scheme_port, src: value, n: sizeof(scheme_port)); |
| 7577 | } |
| 7578 | break; |
| 7579 | } |
| 7580 | case NECP_CLIENT_PARAMETER_RESOLVER_TAG: { |
| 7581 | has_system_signed_result = true; |
| 7582 | struct necp_client_validatable *validatable = (struct necp_client_validatable *)value; |
| 7583 | if (length >= sizeof(struct necp_client_validatable)) { |
| 7584 | // Check for system-signed sign_type values |
| 7585 | if (validatable->signable.sign_type == NECP_CLIENT_SIGN_TYPE_SYSTEM_RESOLVER_ANSWER || |
| 7586 | validatable->signable.sign_type == NECP_CLIENT_SIGN_TYPE_SYSTEM_BROWSE_RESULT || |
| 7587 | validatable->signable.sign_type == NECP_CLIENT_SIGN_TYPE_SYSTEM_SERVICE_RESOLVER_ANSWER) { |
| 7588 | has_system_signed_result = true; |
| 7589 | } |
| 7590 | } |
| 7591 | break; |
| 7592 | } |
| 7593 | default: { |
| 7594 | break; |
| 7595 | } |
| 7596 | } |
| 7597 | } |
| 7598 | } |
| 7599 | |
| 7600 | offset += sizeof(u_int8_t) + sizeof(u_int32_t) + length; |
| 7601 | } |
| 7602 | |
| 7603 | // Check for loopback exception |
| 7604 | if (necp_pass_loopback > 0 && necp_is_loopback(SA(&local_addr.sa), SA(&remote_addr.sa), NULL, NULL, bound_interface_index)) { |
| 7605 | bypass_type = NECP_BYPASS_TYPE_LOOPBACK; |
| 7606 | } else if (bound_interface_index != IFSCOPE_NONE) { |
| 7607 | // Check for inter-process exception |
| 7608 | struct sockaddr *dst = SA(&remote_addr.sa); |
| 7609 | if (dst->sa_family == AF_INET6) { |
| 7610 | struct in6_addr *addrv6 = &(((struct sockaddr_in6 *)(void *)dst)->sin6_addr); |
| 7611 | if (NECP_IS_INTCOPROC_ADDRESS(addrv6)) { |
| 7612 | ifnet_head_lock_shared(); |
| 7613 | ifnet_t bound_interface = ifindex2ifnet[bound_interface_index]; |
| 7614 | if (bound_interface != NULL && IFNET_IS_INTCOPROC(bound_interface)) { |
| 7615 | bypass_type = NECP_BYPASS_TYPE_INTCOPROC; |
| 7616 | } |
| 7617 | ifnet_head_done(); |
| 7618 | } |
| 7619 | } |
| 7620 | } |
| 7621 | |
| 7622 | if (bypass_type == NECP_BYPASS_TYPE_INTCOPROC || (bypass_type == NECP_BYPASS_TYPE_LOOPBACK && necp_pass_loopback == NECP_LOOPBACK_PASS_ALL)) { |
| 7623 | returned_result->policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 7624 | returned_result->skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 7625 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_PASS; |
| 7626 | if (bypass_type == NECP_BYPASS_TYPE_LOOPBACK) { |
| 7627 | returned_result->routed_interface_index = lo_ifp->if_index; |
| 7628 | *flags |= (NECP_CLIENT_RESULT_FLAG_IS_LOCAL | NECP_CLIENT_RESULT_FLAG_IS_DIRECT); |
| 7629 | } else { |
| 7630 | returned_result->routed_interface_index = bound_interface_index; |
| 7631 | } |
| 7632 | if (cred != NULL) { |
| 7633 | kauth_cred_unref(&cred); |
| 7634 | } |
| 7635 | return 0; |
| 7636 | } |
| 7637 | |
| 7638 | if (drop_order != 0) { |
| 7639 | if (remote_endpoint_type == NECP_CLIENT_ENDPOINT_TYPE_APPLICATION_SERVICE || |
| 7640 | client_flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER || |
| 7641 | ((client_flags & NECP_CLIENT_PARAMETER_FLAG_INBOUND) && remote_address_is_empty)) { |
| 7642 | // Allow listeners, inbound connections without remote addresses, and |
| 7643 | // application service connections to bypass the unentitled drop order, |
| 7644 | // to allow them to connect to application services (not directly over |
| 7645 | // physical networking interfaces) |
| 7646 | drop_order = 0; |
| 7647 | } |
| 7648 | } |
| 7649 | |
| 7650 | if (proc_pid(effective_proc) != pid) { |
| 7651 | proc_t found_proc = proc_find(pid); |
| 7652 | if (found_proc != PROC_NULL) { |
| 7653 | effective_proc = found_proc; |
| 7654 | pid_version = proc_pidversion(effective_proc); |
| 7655 | release_eproc = true; |
| 7656 | } |
| 7657 | } |
| 7658 | #if defined(XNU_TARGET_OS_OSX) |
| 7659 | if (effective_proc->p_responsible_pid > 0 && effective_proc->p_responsible_pid != pid) { |
| 7660 | proc_getresponsibleuuid(effective_proc, responsible_application_uuid, sizeof(responsible_application_uuid)); |
| 7661 | responsible_proc = proc_find(pid: effective_proc->p_responsible_pid); |
| 7662 | } |
| 7663 | #endif /* defined(XNU_TARGET_OS_OSX) */ |
| 7664 | |
| 7665 | // Lock |
| 7666 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 7667 | |
| 7668 | u_int32_t route_rule_id_array[MAX_AGGREGATE_ROUTE_RULES]; |
| 7669 | size_t route_rule_id_array_count = 0; |
| 7670 | necp_application_fillout_info_locked(task, application_uuid, real_application_uuid, responsible_application_uuid, account, domain, url, pid, pid_version, uid, real_uid, protocol, bound_interface_index, traffic_class, local_addr: &local_addr, remote_addr: &remote_addr, local_port, remote_port, has_client, has_system_signed_result, real_proc: proc, proc: effective_proc, responsible_proc, drop_order, client_flags, scheme_port, info: &info, is_loopback: (bypass_type == NECP_BYPASS_TYPE_LOOPBACK), is_delegated); |
| 7671 | |
| 7672 | int debug = NECP_ENABLE_DATA_TRACE((&info.local_addr), (&info.remote_addr), info.protocol, info.pid, info.bound_interface_index); |
| 7673 | NECP_DATA_TRACE_LOG_APP_LEVEL(debug, "APPLICATION", "START", 0, 0); |
| 7674 | |
| 7675 | necp_kernel_policy_id skip_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 7676 | matched_policy = necp_socket_find_policy_match_with_info_locked(policy_search_array: necp_kernel_socket_policies_app_layer_map, info: &info, return_filter: &filter_control_unit, return_route_rule_id_array: route_rule_id_array, return_route_rule_id_array_count: &route_rule_id_array_count, MAX_AGGREGATE_ROUTE_RULES, return_service_action: &service_action, return_service: &service, return_netagent_array: netagent_ids, return_netagent_use_flags_array: netagent_use_flags, NECP_MAX_NETAGENTS, required_agent_types, num_required_agent_types, proc: info.used_responsible_pid ? responsible_proc : effective_proc, pf_tag: 0, skip_policy_id: &skip_policy_id, NULL, return_drop_dest_policy_result: &drop_dest_policy_result, return_drop_all_bypass: &drop_all_bypass, return_flow_divert_aggregate_unit: &flow_divert_aggregate_unit, NULL, debug); |
| 7677 | |
| 7678 | // Check for loopback exception again after the policy match |
| 7679 | if (bypass_type == NECP_BYPASS_TYPE_LOOPBACK && |
| 7680 | necp_pass_loopback == NECP_LOOPBACK_PASS_WITH_FILTER && |
| 7681 | (matched_policy == NULL || matched_policy->result != NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT)) { |
| 7682 | if (filter_control_unit == NECP_FILTER_UNIT_NO_FILTER) { |
| 7683 | returned_result->filter_control_unit = 0; |
| 7684 | } else { |
| 7685 | returned_result->filter_control_unit = filter_control_unit; |
| 7686 | } |
| 7687 | |
| 7688 | if (flow_divert_aggregate_unit > 0) { |
| 7689 | returned_result->flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 7690 | } |
| 7691 | |
| 7692 | returned_result->policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 7693 | returned_result->skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 7694 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_PASS; |
| 7695 | returned_result->routed_interface_index = lo_ifp->if_index; |
| 7696 | *flags |= (NECP_CLIENT_RESULT_FLAG_IS_LOCAL | NECP_CLIENT_RESULT_FLAG_IS_DIRECT); |
| 7697 | error = 0; |
| 7698 | goto done; |
| 7699 | } |
| 7700 | |
| 7701 | if (matched_policy) { |
| 7702 | returned_result->policy_id = matched_policy->id; |
| 7703 | returned_result->skip_policy_id = skip_policy_id; |
| 7704 | returned_result->routing_result = matched_policy->result; |
| 7705 | memcpy(dst: &returned_result->routing_result_parameter, src: &matched_policy->result_parameter, n: sizeof(returned_result->routing_result_parameter)); |
| 7706 | if (returned_override_euuid != NULL && info.used_responsible_pid && !(matched_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID)) { |
| 7707 | uuid_copy(dst: *returned_override_euuid, src: responsible_application_uuid); |
| 7708 | } |
| 7709 | } else { |
| 7710 | bool drop_all = false; |
| 7711 | if (necp_drop_all_order > 0 || info.drop_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP) { |
| 7712 | // Mark socket as a drop if drop_all is set |
| 7713 | drop_all = true; |
| 7714 | if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) { |
| 7715 | drop_all_bypass = necp_check_drop_all_bypass_result(proc); |
| 7716 | } |
| 7717 | } |
| 7718 | if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) { |
| 7719 | returned_result->policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 7720 | returned_result->skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 7721 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 7722 | NECP_DATA_TRACE_LOG_APP_LEVEL(debug, "APPLICATION", "RESULT - DROP <NO MATCH>", 0, 0); |
| 7723 | } else { |
| 7724 | returned_result->policy_id = 0; |
| 7725 | returned_result->skip_policy_id = 0; |
| 7726 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_NONE; |
| 7727 | } |
| 7728 | } |
| 7729 | if (necp_check_missing_client_drop(proc, info: &info) || |
| 7730 | necp_check_restricted_multicast_drop(proc, info: &info, false)) { |
| 7731 | // Mark as drop |
| 7732 | returned_result->policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 7733 | returned_result->skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 7734 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 7735 | NECP_DATA_TRACE_LOG_APP_LEVEL(debug, "APPLICATION", "RESULT - DROP <NO CLIENT / MULTICAST>", 0, 0); |
| 7736 | } |
| 7737 | if (filter_control_unit == NECP_FILTER_UNIT_NO_FILTER) { |
| 7738 | returned_result->filter_control_unit = 0; |
| 7739 | } else { |
| 7740 | returned_result->filter_control_unit = filter_control_unit; |
| 7741 | } |
| 7742 | |
| 7743 | if (flow_divert_aggregate_unit > 0) { |
| 7744 | returned_result->flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 7745 | } |
| 7746 | |
| 7747 | returned_result->service_action = service_action; |
| 7748 | |
| 7749 | // Fetch service registration |
| 7750 | if (service.identifier != 0) { |
| 7751 | struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: service.identifier); |
| 7752 | if (mapping != NULL) { |
| 7753 | struct necp_service_registration *service_registration = NULL; |
| 7754 | uuid_copy(dst: returned_result->service_uuid, src: mapping->uuid); |
| 7755 | returned_result->service_data = service.data; |
| 7756 | if (service.identifier == NECP_NULL_SERVICE_ID) { |
| 7757 | // NULL service is always 'registered' |
| 7758 | returned_result->service_flags |= NECP_SERVICE_FLAGS_REGISTERED; |
| 7759 | } else { |
| 7760 | LIST_FOREACH(service_registration, &necp_registered_service_list, kernel_chain) { |
| 7761 | if (service.identifier == service_registration->service_id) { |
| 7762 | returned_result->service_flags |= NECP_SERVICE_FLAGS_REGISTERED; |
| 7763 | break; |
| 7764 | } |
| 7765 | } |
| 7766 | } |
| 7767 | } |
| 7768 | } |
| 7769 | |
| 7770 | // Handle netagents |
| 7771 | size_t netagent_i = 0; |
| 7772 | for (netagent_cursor = 0; netagent_cursor < NECP_MAX_NETAGENTS; netagent_cursor++) { |
| 7773 | struct necp_uuid_id_mapping *mapping = NULL; |
| 7774 | u_int32_t netagent_id = netagent_ids[netagent_cursor]; |
| 7775 | if (netagent_id == 0) { |
| 7776 | continue; |
| 7777 | } |
| 7778 | mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: netagent_id); |
| 7779 | if (mapping != NULL) { |
| 7780 | uuid_copy(dst: returned_result->netagents[netagent_i], src: mapping->uuid); |
| 7781 | returned_result->netagent_use_flags[netagent_i] = netagent_use_flags[netagent_cursor]; |
| 7782 | netagent_i++; |
| 7783 | } |
| 7784 | |
| 7785 | // If the flags say to remove, clear the local copy |
| 7786 | if (netagent_use_flags[netagent_cursor] & NECP_AGENT_USE_FLAG_REMOVE) { |
| 7787 | netagent_ids[netagent_cursor] = 0; |
| 7788 | } |
| 7789 | } |
| 7790 | |
| 7791 | // Do routing evaluation |
| 7792 | u_int output_bound_interface = bound_interface_index; |
| 7793 | if (returned_result->routing_result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED) { |
| 7794 | output_bound_interface = returned_result->routing_result_parameter.scoped_interface_index; |
| 7795 | } else if (returned_result->routing_result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL) { |
| 7796 | output_bound_interface = returned_result->routing_result_parameter.tunnel_interface_index; |
| 7797 | } else if (returned_result->routing_result == NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT) { |
| 7798 | output_bound_interface = necp_get_primary_direct_interface_index(); |
| 7799 | if (output_bound_interface == IFSCOPE_NONE) { |
| 7800 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 7801 | } else { |
| 7802 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED; |
| 7803 | returned_result->routing_result_parameter.scoped_interface_index = output_bound_interface; |
| 7804 | } |
| 7805 | } |
| 7806 | |
| 7807 | if (returned_result->routing_result == NECP_KERNEL_POLICY_RESULT_DROP && |
| 7808 | returned_result->routing_result_parameter.drop_flags & NECP_KERNEL_POLICY_DROP_FLAG_LOCAL_NETWORK) { |
| 7809 | if (!(matched_policy->result_parameter.drop_flags & NECP_KERNEL_POLICY_DROP_FLAG_SUPPRESS_ALERTS)) { |
| 7810 | // Trigger the event that we dropped due to a local network policy |
| 7811 | necp_send_network_denied_event(pid, proc_uuid: application_uuid, NETPOLICY_NETWORKTYPE_LOCAL); |
| 7812 | } |
| 7813 | if (reason != NULL) { |
| 7814 | *reason = NECP_CLIENT_RESULT_REASON_LOCAL_NETWORK_PROHIBITED; |
| 7815 | } |
| 7816 | } |
| 7817 | |
| 7818 | if (local_addr.sa.sa_len == 0 || |
| 7819 | (local_addr.sa.sa_family == AF_INET && local_addr.sin.sin_addr.s_addr == 0) || |
| 7820 | (local_addr.sa.sa_family == AF_INET6 && IN6_IS_ADDR_UNSPECIFIED(&local_addr.sin6.sin6_addr))) { |
| 7821 | no_local_addr = TRUE; |
| 7822 | } |
| 7823 | |
| 7824 | if (remote_addr.sa.sa_len == 0 || |
| 7825 | (remote_addr.sa.sa_family == AF_INET && remote_addr.sin.sin_addr.s_addr == 0) || |
| 7826 | (remote_addr.sa.sa_family == AF_INET6 && IN6_IS_ADDR_UNSPECIFIED(&remote_addr.sin6.sin6_addr))) { |
| 7827 | no_remote_addr = TRUE; |
| 7828 | remote_family = remote_addr.sa.sa_family; |
| 7829 | } |
| 7830 | |
| 7831 | returned_result->routed_interface_index = 0; |
| 7832 | struct rtentry *rt = NULL; |
| 7833 | if (!no_local_addr && (client_flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) != 0) { |
| 7834 | // Treat the output bound interface as the routed interface for local address |
| 7835 | // validation later. |
| 7836 | returned_result->routed_interface_index = output_bound_interface; |
| 7837 | } else { |
| 7838 | if (no_remote_addr) { |
| 7839 | memset(s: &remote_addr, c: 0, n: sizeof(remote_addr)); |
| 7840 | if (remote_family == AF_INET6) { |
| 7841 | // Reset address to :: |
| 7842 | remote_addr.sa.sa_family = AF_INET6; |
| 7843 | remote_addr.sa.sa_len = sizeof(struct sockaddr_in6); |
| 7844 | } else { |
| 7845 | // Reset address to 0.0.0.0 |
| 7846 | remote_addr.sa.sa_family = AF_INET; |
| 7847 | remote_addr.sa.sa_len = sizeof(struct sockaddr_in); |
| 7848 | } |
| 7849 | } |
| 7850 | |
| 7851 | rt = rtalloc1_scoped((struct sockaddr *)&remote_addr, 0, 0, |
| 7852 | output_bound_interface); |
| 7853 | |
| 7854 | if (remote_addr.sa.sa_family == AF_INET && rt != NULL && |
| 7855 | IS_INTF_CLAT46(rt->rt_ifp)) { |
| 7856 | rtfree(rt); |
| 7857 | rt = NULL; |
| 7858 | returned_result->routed_interface_index = 0; |
| 7859 | } |
| 7860 | |
| 7861 | if (no_remote_addr && remote_family == AF_UNSPEC && |
| 7862 | (rt == NULL || rt->rt_ifp == NULL)) { |
| 7863 | // Route lookup for default IPv4 failed, try IPv6 |
| 7864 | |
| 7865 | // Cleanup old route if necessary |
| 7866 | if (rt != NULL) { |
| 7867 | rtfree(rt); |
| 7868 | rt = NULL; |
| 7869 | } |
| 7870 | |
| 7871 | // Reset address to :: |
| 7872 | memset(s: &remote_addr, c: 0, n: sizeof(remote_addr)); |
| 7873 | remote_addr.sa.sa_family = AF_INET6; |
| 7874 | remote_addr.sa.sa_len = sizeof(struct sockaddr_in6); |
| 7875 | |
| 7876 | // Get route |
| 7877 | rt = rtalloc1_scoped((struct sockaddr *)&remote_addr, 0, 0, |
| 7878 | output_bound_interface); |
| 7879 | } |
| 7880 | |
| 7881 | if (rt != NULL && |
| 7882 | rt->rt_ifp != NULL) { |
| 7883 | returned_result->routed_interface_index = rt->rt_ifp->if_index; |
| 7884 | /* |
| 7885 | * For local addresses, we allow the interface scope to be |
| 7886 | * either the loopback interface or the interface hosting the |
| 7887 | * local address. |
| 7888 | */ |
| 7889 | if (bound_interface_index != IFSCOPE_NONE && |
| 7890 | rt->rt_ifa != NULL && rt->rt_ifa->ifa_ifp && |
| 7891 | (output_bound_interface == lo_ifp->if_index || |
| 7892 | rt->rt_ifp->if_index == lo_ifp->if_index || |
| 7893 | rt->rt_ifa->ifa_ifp->if_index == bound_interface_index)) { |
| 7894 | struct sockaddr_storage dst; |
| 7895 | unsigned int ifscope = bound_interface_index; |
| 7896 | |
| 7897 | /* |
| 7898 | * Transform dst into the internal routing table form |
| 7899 | */ |
| 7900 | (void) sa_copy((struct sockaddr *)&remote_addr, |
| 7901 | &dst, &ifscope); |
| 7902 | |
| 7903 | if ((rt->rt_ifp->if_index == lo_ifp->if_index) || |
| 7904 | rt_ifa_is_dst((struct sockaddr *)&dst, rt->rt_ifa)) { |
| 7905 | returned_result->routed_interface_index = |
| 7906 | bound_interface_index; |
| 7907 | } |
| 7908 | } |
| 7909 | } |
| 7910 | } |
| 7911 | |
| 7912 | if (returned_result->routed_interface_index != 0 && |
| 7913 | returned_result->routed_interface_index != lo_ifp->if_index && // Loopback can accept any local address |
| 7914 | !no_local_addr) { |
| 7915 | // Transform local_addr into the ifaddr form |
| 7916 | // IPv6 Scope IDs are always embedded in the ifaddr list |
| 7917 | struct sockaddr_storage local_address_sanitized; |
| 7918 | u_int ifscope = IFSCOPE_NONE; |
| 7919 | (void)sa_copy(SA(&local_addr.sa), &local_address_sanitized, &ifscope); |
| 7920 | SIN(&local_address_sanitized)->sin_port = 0; |
| 7921 | if (local_address_sanitized.ss_family == AF_INET6) { |
| 7922 | if (in6_embedded_scope || !IN6_IS_SCOPE_EMBED(&SIN6(&local_address_sanitized)->sin6_addr)) { |
| 7923 | SIN6(&local_address_sanitized)->sin6_scope_id = 0; |
| 7924 | } |
| 7925 | } |
| 7926 | |
| 7927 | // Validate local address on routed interface |
| 7928 | struct ifaddr *ifa = ifa_ifwithaddr_scoped((struct sockaddr *)&local_address_sanitized, returned_result->routed_interface_index); |
| 7929 | if (ifa == NULL) { |
| 7930 | // Interface address not found, reject route |
| 7931 | returned_result->routed_interface_index = 0; |
| 7932 | if (rt != NULL) { |
| 7933 | rtfree(rt); |
| 7934 | rt = NULL; |
| 7935 | } |
| 7936 | } else { |
| 7937 | ifaddr_release(ifaddr: ifa); |
| 7938 | ifa = NULL; |
| 7939 | } |
| 7940 | } |
| 7941 | |
| 7942 | if (flags != NULL) { |
| 7943 | #if SKYWALK && defined(XNU_TARGET_OS_OSX) |
| 7944 | enum net_filter_event_subsystems filters = net_filter_event_get_state(); |
| 7945 | |
| 7946 | if (filters & (NET_FILTER_EVENT_SOCKET | NET_FILTER_EVENT_INTERFACE | NET_FILTER_EVENT_IP)) { |
| 7947 | *flags |= NECP_CLIENT_RESULT_FLAG_KEXT_FILTER_PRESENT; |
| 7948 | } |
| 7949 | if (filters & NET_FILTER_EVENT_PF_PRIVATE_PROXY) { |
| 7950 | *flags |= NECP_CLIENT_RESULT_FLAG_PF_RULES_PRESENT; |
| 7951 | } |
| 7952 | if (filters & NET_FILTER_EVENT_ALF) { |
| 7953 | *flags |= NECP_CLIENT_RESULT_FLAG_ALF_PRESENT; |
| 7954 | } |
| 7955 | if (filters & NET_FILTER_EVENT_PARENTAL_CONTROLS) { |
| 7956 | *flags |= NECP_CLIENT_RESULT_FLAG_PARENTAL_CONTROLS_PRESENT; |
| 7957 | } |
| 7958 | #endif /* SKYWALK && defined(XNU_TARGET_OS_OSX) */ |
| 7959 | if ((client_flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) == 0) { |
| 7960 | // Check for local/direct |
| 7961 | bool is_local = FALSE; |
| 7962 | if (rt != NULL && (rt->rt_flags & RTF_LOCAL)) { |
| 7963 | is_local = TRUE; |
| 7964 | } else if (returned_result->routed_interface_index != 0 && |
| 7965 | !no_remote_addr) { |
| 7966 | // Clean up the address before comparison with interface addresses |
| 7967 | |
| 7968 | // Transform remote_addr into the ifaddr form |
| 7969 | // IPv6 Scope IDs are always embedded in the ifaddr list |
| 7970 | struct sockaddr_storage remote_address_sanitized; |
| 7971 | u_int ifscope = IFSCOPE_NONE; |
| 7972 | (void)sa_copy(SA(&remote_addr.sa), &remote_address_sanitized, &ifscope); |
| 7973 | SIN(&remote_address_sanitized)->sin_port = 0; |
| 7974 | if (remote_address_sanitized.ss_family == AF_INET6) { |
| 7975 | if (in6_embedded_scope || !IN6_IS_SCOPE_EMBED(&SIN6(&remote_address_sanitized)->sin6_addr)) { |
| 7976 | SIN6(&remote_address_sanitized)->sin6_scope_id = 0; |
| 7977 | } |
| 7978 | } |
| 7979 | |
| 7980 | // Check if remote address is an interface address |
| 7981 | struct ifaddr *ifa = ifa_ifwithaddr((struct sockaddr *)&remote_address_sanitized); |
| 7982 | if (ifa != NULL && ifa->ifa_ifp != NULL) { |
| 7983 | u_int if_index_for_remote_addr = ifa->ifa_ifp->if_index; |
| 7984 | if (if_index_for_remote_addr == returned_result->routed_interface_index || |
| 7985 | if_index_for_remote_addr == lo_ifp->if_index) { |
| 7986 | is_local = TRUE; |
| 7987 | } |
| 7988 | } |
| 7989 | if (ifa != NULL) { |
| 7990 | ifaddr_release(ifaddr: ifa); |
| 7991 | ifa = NULL; |
| 7992 | } |
| 7993 | } |
| 7994 | |
| 7995 | if (is_local) { |
| 7996 | *flags |= (NECP_CLIENT_RESULT_FLAG_IS_LOCAL | NECP_CLIENT_RESULT_FLAG_IS_DIRECT); |
| 7997 | } else if (rt != NULL) { |
| 7998 | if (rt->rt_flags & RTF_GLOBAL) { |
| 7999 | *flags |= NECP_CLIENT_RESULT_FLAG_IS_GLOBAL_INTERNET; |
| 8000 | } else if (!(rt->rt_flags & RTF_GATEWAY) && |
| 8001 | (rt->rt_ifa && rt->rt_ifa->ifa_ifp && !(rt->rt_ifa->ifa_ifp->if_flags & IFF_POINTOPOINT))) { |
| 8002 | // Route is directly accessible |
| 8003 | *flags |= NECP_CLIENT_RESULT_FLAG_IS_DIRECT; |
| 8004 | } |
| 8005 | } |
| 8006 | |
| 8007 | if (rt != NULL && |
| 8008 | rt->rt_ifp != NULL) { |
| 8009 | // Check probe status |
| 8010 | if (rt->rt_ifp->if_eflags & IFEF_PROBE_CONNECTIVITY) { |
| 8011 | *flags |= NECP_CLIENT_RESULT_FLAG_PROBE_CONNECTIVITY; |
| 8012 | } |
| 8013 | |
| 8014 | if (rt->rt_ifp->if_type == IFT_CELLULAR) { |
| 8015 | struct if_cellular_status_v1 *ifsr; |
| 8016 | |
| 8017 | ifnet_lock_shared(ifp: rt->rt_ifp); |
| 8018 | lck_rw_lock_exclusive(lck: &rt->rt_ifp->if_link_status_lock); |
| 8019 | |
| 8020 | if (rt->rt_ifp->if_link_status != NULL) { |
| 8021 | ifsr = &rt->rt_ifp->if_link_status->ifsr_u.ifsr_cell.if_cell_u.if_status_v1; |
| 8022 | |
| 8023 | if (ifsr->valid_bitmask & IF_CELL_UL_MSS_RECOMMENDED_VALID) { |
| 8024 | if (ifsr->mss_recommended == IF_CELL_UL_MSS_RECOMMENDED_NONE) { |
| 8025 | returned_result->mss_recommended = NECP_CLIENT_RESULT_RECOMMENDED_MSS_NONE; |
| 8026 | } else if (ifsr->mss_recommended == IF_CELL_UL_MSS_RECOMMENDED_MEDIUM) { |
| 8027 | returned_result->mss_recommended = NECP_CLIENT_RESULT_RECOMMENDED_MSS_MEDIUM; |
| 8028 | } else if (ifsr->mss_recommended == IF_CELL_UL_MSS_RECOMMENDED_LOW) { |
| 8029 | returned_result->mss_recommended = NECP_CLIENT_RESULT_RECOMMENDED_MSS_LOW; |
| 8030 | } |
| 8031 | } |
| 8032 | } |
| 8033 | lck_rw_done(lck: &rt->rt_ifp->if_link_status_lock); |
| 8034 | ifnet_lock_done(ifp: rt->rt_ifp); |
| 8035 | } |
| 8036 | |
| 8037 | // Check link quality |
| 8038 | if ((client_flags & NECP_CLIENT_PARAMETER_FLAG_DISCRETIONARY) && |
| 8039 | (rt->rt_ifp->if_interface_state.valid_bitmask & IF_INTERFACE_STATE_LQM_STATE_VALID) && |
| 8040 | rt->rt_ifp->if_interface_state.lqm_state == IFNET_LQM_THRESH_ABORT) { |
| 8041 | *flags |= NECP_CLIENT_RESULT_FLAG_LINK_QUALITY_ABORT; |
| 8042 | } |
| 8043 | |
| 8044 | // Check QoS marking (fastlane) |
| 8045 | for (size_t route_rule_index = 0; route_rule_index < route_rule_id_array_count; route_rule_index++) { |
| 8046 | if (necp_update_qos_marking(ifp: rt->rt_ifp, netagent_array: netagent_ids, NECP_MAX_NETAGENTS, route_rule_id: route_rule_id_array[route_rule_index])) { |
| 8047 | *flags |= NECP_CLIENT_RESULT_FLAG_ALLOW_QOS_MARKING; |
| 8048 | // If the route can use QoS markings, stop iterating route rules |
| 8049 | break; |
| 8050 | } |
| 8051 | } |
| 8052 | |
| 8053 | if (IFNET_IS_LOW_POWER(rt->rt_ifp)) { |
| 8054 | *flags |= NECP_CLIENT_RESULT_FLAG_INTERFACE_LOW_POWER; |
| 8055 | } |
| 8056 | |
| 8057 | if (traffic_class == SO_TC_BK_SYS) { |
| 8058 | // Block BK_SYS traffic if interface is throttled |
| 8059 | u_int32_t throttle_level = 0; |
| 8060 | if (ifnet_get_throttle(rt->rt_ifp, &throttle_level) == 0) { |
| 8061 | if (throttle_level == IFNET_THROTTLE_OPPORTUNISTIC) { |
| 8062 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 8063 | memset(s: &returned_result->routing_result_parameter, c: 0, n: sizeof(returned_result->routing_result_parameter)); |
| 8064 | } |
| 8065 | } |
| 8066 | } |
| 8067 | } |
| 8068 | } |
| 8069 | |
| 8070 | u_int interface_to_check = returned_result->routed_interface_index; |
| 8071 | if (interface_to_check == 0) { |
| 8072 | interface_to_check = output_bound_interface; |
| 8073 | } |
| 8074 | union necp_sockaddr_union default_address; |
| 8075 | struct rtentry *v4Route = NULL; |
| 8076 | struct rtentry *v6Route = NULL; |
| 8077 | |
| 8078 | memset(s: &default_address, c: 0, n: sizeof(default_address)); |
| 8079 | |
| 8080 | // Reset address to 0.0.0.0 |
| 8081 | default_address.sa.sa_family = AF_INET; |
| 8082 | default_address.sa.sa_len = sizeof(struct sockaddr_in); |
| 8083 | v4Route = rtalloc1_scoped((struct sockaddr *)&default_address, 0, 0, |
| 8084 | returned_result->routed_interface_index); |
| 8085 | |
| 8086 | // Reset address to :: |
| 8087 | default_address.sa.sa_family = AF_INET6; |
| 8088 | default_address.sa.sa_len = sizeof(struct sockaddr_in6); |
| 8089 | v6Route = rtalloc1_scoped((struct sockaddr *)&default_address, 0, 0, |
| 8090 | returned_result->routed_interface_index); |
| 8091 | |
| 8092 | if (v4Route != NULL) { |
| 8093 | if (v4Route->rt_ifp != NULL && !IS_INTF_CLAT46(v4Route->rt_ifp)) { |
| 8094 | *flags |= NECP_CLIENT_RESULT_FLAG_HAS_IPV4; |
| 8095 | } |
| 8096 | if (returned_v4_gateway != NULL && |
| 8097 | v4Route->rt_gateway != NULL && |
| 8098 | v4Route->rt_gateway->sa_len == sizeof(returned_v4_gateway->u.sin)) { |
| 8099 | memcpy(dst: &returned_v4_gateway->u.sin, src: v4Route->rt_gateway, n: sizeof(returned_v4_gateway->u.sin)); |
| 8100 | memset(s: &returned_v4_gateway->u.sin.sin_zero, c: 0, n: sizeof(returned_v4_gateway->u.sin.sin_zero)); |
| 8101 | } |
| 8102 | rtfree(v4Route); |
| 8103 | v4Route = NULL; |
| 8104 | } |
| 8105 | |
| 8106 | if (v6Route != NULL) { |
| 8107 | if (v6Route->rt_ifp != NULL) { |
| 8108 | *flags |= NECP_CLIENT_RESULT_FLAG_HAS_IPV6; |
| 8109 | |
| 8110 | if (ifnet_get_nat64prefix(v6Route->rt_ifp, returned_result->nat64_prefixes) == 0) { |
| 8111 | *flags |= NECP_CLIENT_RESULT_FLAG_HAS_NAT64; |
| 8112 | } |
| 8113 | } |
| 8114 | if (returned_v6_gateway != NULL && |
| 8115 | v6Route->rt_gateway != NULL && |
| 8116 | v6Route->rt_gateway->sa_len == sizeof(returned_v6_gateway->u.sin6)) { |
| 8117 | memcpy(dst: &returned_v6_gateway->u.sin6, src: v6Route->rt_gateway, n: sizeof(returned_v6_gateway->u.sin6)); |
| 8118 | } |
| 8119 | rtfree(v6Route); |
| 8120 | v6Route = NULL; |
| 8121 | } |
| 8122 | } |
| 8123 | |
| 8124 | // Take two passes through the rule list: first for rules that don't match based on agents, |
| 8125 | // second for rules that match based on agents. Since rules can modify the agent list itself, |
| 8126 | // this makes the logic more deterministic. This allows a non-agent matching rule to remove |
| 8127 | // an agent before it is used for matching later. |
| 8128 | size_t route_rule_index = 0; |
| 8129 | bool second_pass = false; |
| 8130 | while (route_rule_index < route_rule_id_array_count) { |
| 8131 | bool rule_matches_agents = necp_route_rule_matches_agents(route_rule_id: route_rule_id_array[route_rule_index]); |
| 8132 | if (rule_matches_agents != second_pass) { |
| 8133 | // Process rules that match based on agents only in the second pass |
| 8134 | route_rule_index++; |
| 8135 | if (route_rule_index == route_rule_id_array_count && !second_pass) { |
| 8136 | route_rule_index = 0; |
| 8137 | second_pass = true; |
| 8138 | } |
| 8139 | continue; |
| 8140 | } |
| 8141 | |
| 8142 | u_int32_t interface_type_denied = IFRTYPE_FUNCTIONAL_UNKNOWN; |
| 8143 | bool route_is_allowed = necp_route_is_allowed(route: rt, NULL, netagent_array: netagent_ids, NECP_MAX_NETAGENTS, route_rule_id: route_rule_id_array[route_rule_index], interface_type_denied: &interface_type_denied); |
| 8144 | if (!route_is_allowed) { |
| 8145 | // If the route is blocked, treat the lookup as a drop |
| 8146 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 8147 | memset(s: &returned_result->routing_result_parameter, c: 0, n: sizeof(returned_result->routing_result_parameter)); |
| 8148 | |
| 8149 | if (interface_type_denied != IFRTYPE_FUNCTIONAL_UNKNOWN) { |
| 8150 | if (reason != NULL) { |
| 8151 | if (interface_type_denied == IFRTYPE_FUNCTIONAL_CELLULAR) { |
| 8152 | *reason = NECP_CLIENT_RESULT_REASON_CELLULAR_DENIED; |
| 8153 | } else if (interface_type_denied == IFRTYPE_FUNCTIONAL_WIFI_INFRA) { |
| 8154 | *reason = NECP_CLIENT_RESULT_REASON_WIFI_DENIED; |
| 8155 | } |
| 8156 | } |
| 8157 | necp_send_application_interface_denied_event(pid, proc_uuid: application_uuid, if_functional_type: interface_type_denied); |
| 8158 | } |
| 8159 | // If the route gets denied, stop matching rules |
| 8160 | break; |
| 8161 | } |
| 8162 | |
| 8163 | // Check if there is a route rule that adds flow divert, if we don't already have a terminal policy result |
| 8164 | if (returned_result->routing_result == NECP_KERNEL_POLICY_RESULT_NONE) { |
| 8165 | u_int32_t flow_divert_control_unit = necp_route_get_flow_divert(route: rt, netagent_array: netagent_ids, NECP_MAX_NETAGENTS, |
| 8166 | route_rule_id: route_rule_id_array[route_rule_index], flow_divert_aggregate_unit: &flow_divert_aggregate_unit); |
| 8167 | if (flow_divert_control_unit != 0) { |
| 8168 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT; |
| 8169 | returned_result->routing_result_parameter.flow_divert_control_unit = flow_divert_control_unit; |
| 8170 | } |
| 8171 | if (flow_divert_aggregate_unit != 0) { |
| 8172 | returned_result->flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 8173 | } |
| 8174 | } |
| 8175 | |
| 8176 | // Check if there is a route rule that adds or removes an agent |
| 8177 | bool remove = false; |
| 8178 | u_int32_t netagent_id = necp_route_get_netagent(route: rt, netagent_array: netagent_ids, NECP_MAX_NETAGENTS, route_rule_id: route_rule_id_array[route_rule_index], remove: &remove); |
| 8179 | if (netagent_id != 0) { |
| 8180 | struct necp_uuid_id_mapping *mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: netagent_id); |
| 8181 | if (mapping != NULL) { |
| 8182 | bool agent_already_present = false; |
| 8183 | for (netagent_cursor = 0; netagent_cursor < NECP_MAX_NETAGENTS; netagent_cursor++) { |
| 8184 | if (uuid_compare(uu1: returned_result->netagents[netagent_cursor], uu2: mapping->uuid) == 0) { |
| 8185 | // Found the agent already present |
| 8186 | agent_already_present = true; |
| 8187 | if (remove) { |
| 8188 | // Mark as remove if necessary |
| 8189 | returned_result->netagent_use_flags[netagent_cursor] = NECP_AGENT_USE_FLAG_REMOVE; |
| 8190 | } |
| 8191 | } else if (uuid_is_null(uu: returned_result->netagents[netagent_cursor])) { |
| 8192 | // Found open slot |
| 8193 | if (!agent_already_present) { |
| 8194 | uuid_copy(dst: returned_result->netagents[netagent_cursor], src: mapping->uuid); |
| 8195 | if (remove) { |
| 8196 | returned_result->netagent_use_flags[netagent_cursor] = NECP_AGENT_USE_FLAG_REMOVE; |
| 8197 | } else { |
| 8198 | returned_result->netagent_use_flags[netagent_cursor] = 0; |
| 8199 | } |
| 8200 | } |
| 8201 | break; |
| 8202 | } |
| 8203 | } |
| 8204 | } |
| 8205 | |
| 8206 | // Update the local netagent_ids array for future evaluations |
| 8207 | if (remove) { |
| 8208 | // Check if the agent ID is in the array, and remove it |
| 8209 | for (netagent_cursor = 0; netagent_cursor < NECP_MAX_NETAGENTS; netagent_cursor++) { |
| 8210 | if (netagent_id == netagent_ids[netagent_cursor]) { |
| 8211 | netagent_ids[netagent_cursor] = 0; |
| 8212 | } |
| 8213 | } |
| 8214 | } else { |
| 8215 | // Check if the agent ID is not yet in the array, and add it |
| 8216 | bool found = false; |
| 8217 | for (netagent_cursor = 0; netagent_cursor < NECP_MAX_NETAGENTS; netagent_cursor++) { |
| 8218 | if (netagent_id == netagent_ids[netagent_cursor]) { |
| 8219 | found = true; |
| 8220 | break; |
| 8221 | } |
| 8222 | } |
| 8223 | if (!found) { |
| 8224 | for (netagent_cursor = 0; netagent_cursor < NECP_MAX_NETAGENTS; netagent_cursor++) { |
| 8225 | if (netagent_ids[netagent_cursor] == 0) { |
| 8226 | // Empty slot, add the agent |
| 8227 | netagent_ids[netagent_cursor] = netagent_id; |
| 8228 | break; |
| 8229 | } |
| 8230 | } |
| 8231 | } |
| 8232 | } |
| 8233 | } |
| 8234 | |
| 8235 | route_rule_index++; |
| 8236 | if (route_rule_index == route_rule_id_array_count && !second_pass) { |
| 8237 | route_rule_index = 0; |
| 8238 | second_pass = true; |
| 8239 | } |
| 8240 | } |
| 8241 | |
| 8242 | if (rt != NULL && rt->rt_ifp != NULL) { |
| 8243 | const bool is_listener = ((client_flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER) != 0); |
| 8244 | const bool is_browser = ((client_flags & NECP_CLIENT_PARAMETER_FLAG_BROWSE) != 0); |
| 8245 | const bool expensive_prohibited = ((client_flags & NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_EXPENSIVE) && |
| 8246 | IFNET_IS_EXPENSIVE(rt->rt_ifp)); |
| 8247 | const bool constrained_prohibited = ((client_flags & NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_CONSTRAINED) && |
| 8248 | IFNET_IS_CONSTRAINED(rt->rt_ifp)); |
| 8249 | const bool interface_type_blocked = !necp_route_is_interface_type_allowed(route: rt, NULL, proc, NULL); |
| 8250 | if (!is_listener && !is_browser) { |
| 8251 | if (reason != NULL) { |
| 8252 | if (expensive_prohibited) { |
| 8253 | *reason = NECP_CLIENT_RESULT_REASON_EXPENSIVE_PROHIBITED; |
| 8254 | } else if (constrained_prohibited) { |
| 8255 | *reason = NECP_CLIENT_RESULT_REASON_CONSTRAINED_PROHIBITED; |
| 8256 | } |
| 8257 | } |
| 8258 | if (expensive_prohibited || constrained_prohibited || interface_type_blocked) { |
| 8259 | // If a property of the interface was not allowed, treat it as a drop |
| 8260 | returned_result->routing_result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 8261 | memset(s: &returned_result->routing_result_parameter, c: 0, n: sizeof(returned_result->routing_result_parameter)); |
| 8262 | } |
| 8263 | } |
| 8264 | } |
| 8265 | |
| 8266 | if (rt != NULL) { |
| 8267 | if (returned_route != NULL) { |
| 8268 | *returned_route = rt; |
| 8269 | } else { |
| 8270 | rtfree(rt); |
| 8271 | } |
| 8272 | rt = NULL; |
| 8273 | } |
| 8274 | |
| 8275 | done: |
| 8276 | // Unlock |
| 8277 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 8278 | |
| 8279 | if (release_eproc && effective_proc != PROC_NULL) { |
| 8280 | proc_rele(p: effective_proc); |
| 8281 | } |
| 8282 | #if defined(XNU_TARGET_OS_OSX) |
| 8283 | if (responsible_proc != PROC_NULL) { |
| 8284 | proc_rele(p: responsible_proc); |
| 8285 | } |
| 8286 | #endif |
| 8287 | |
| 8288 | if (cred != NULL) { |
| 8289 | kauth_cred_unref(&cred); |
| 8290 | } |
| 8291 | |
| 8292 | return error; |
| 8293 | } |
| 8294 | |
| 8295 | static bool |
| 8296 | necp_is_route_local(union necp_sockaddr_union *remote_addr) |
| 8297 | { |
| 8298 | struct rtentry *rt = NULL; |
| 8299 | bool is_local = FALSE; |
| 8300 | |
| 8301 | if (remote_addr == NULL) { |
| 8302 | return NULL; |
| 8303 | } |
| 8304 | |
| 8305 | if (remote_addr->sa.sa_len == 0 || |
| 8306 | (remote_addr->sa.sa_family == AF_INET && remote_addr->sin.sin_addr.s_addr == 0) || |
| 8307 | (remote_addr->sa.sa_family == AF_INET6 && IN6_IS_ADDR_UNSPECIFIED(&remote_addr->sin6.sin6_addr))) { |
| 8308 | return FALSE; |
| 8309 | } |
| 8310 | |
| 8311 | // Lookup route regardless of the scoped interface to check if |
| 8312 | // remote address is in a local network. |
| 8313 | rt = rtalloc1_scoped((struct sockaddr *)remote_addr, 0, 0, 0); |
| 8314 | |
| 8315 | if (rt == NULL) { |
| 8316 | goto done; |
| 8317 | } |
| 8318 | if (remote_addr->sa.sa_family == AF_INET && IS_INTF_CLAT46(rt->rt_ifp)) { |
| 8319 | goto free_rt; |
| 8320 | } |
| 8321 | is_local = IS_NECP_DEST_IN_LOCAL_NETWORKS(rt); |
| 8322 | |
| 8323 | free_rt: |
| 8324 | rtfree(rt); |
| 8325 | |
| 8326 | done: |
| 8327 | return is_local; |
| 8328 | } |
| 8329 | |
| 8330 | static bool |
| 8331 | necp_socket_check_policy(struct necp_kernel_socket_policy *kernel_policy, necp_app_id app_id, necp_app_id real_app_id, uint8_t is_entitled, u_int32_t account_id, struct substring domain, u_int8_t domain_dot_count, const char *url, pid_t pid, int32_t pid_version, uid_t uid, uid_t real_uid, u_int32_t bound_interface_index, u_int32_t traffic_class, u_int16_t protocol, union necp_sockaddr_union *local, union necp_sockaddr_union *remote, struct necp_client_parameter_netagent_type *required_agent_types, u_int32_t num_required_agent_types, bool has_client, uint32_t client_flags, int is_platform_binary, bool has_signed_result, proc_t proc, u_int16_t pf_tag, u_int16_t scheme_port, struct rtentry *rt, bool is_loopback, int debug, bool real_is_platform_binary, u_int32_t bound_interface_flags, u_int32_t bound_interface_eflags, u_int32_t bound_interface_xflags, struct necp_socket_info *info, bool is_delegated) |
| 8332 | { |
| 8333 | if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES)) { |
| 8334 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) { |
| 8335 | u_int32_t cond_bound_interface_index = kernel_policy->cond_bound_interface ? kernel_policy->cond_bound_interface->if_index : 0; |
| 8336 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE, |
| 8337 | "NECP_KERNEL_CONDITION_BOUND_INTERFACE", cond_bound_interface_index, bound_interface_index); |
| 8338 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) { |
| 8339 | if (bound_interface_index == cond_bound_interface_index) { |
| 8340 | // No match, matches forbidden interface |
| 8341 | return FALSE; |
| 8342 | } |
| 8343 | } else { |
| 8344 | if (bound_interface_index != cond_bound_interface_index) { |
| 8345 | // No match, does not match required interface |
| 8346 | return FALSE; |
| 8347 | } |
| 8348 | } |
| 8349 | } |
| 8350 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) { |
| 8351 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS, |
| 8352 | "NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS - flags", kernel_policy->cond_bound_interface_flags, bound_interface_flags); |
| 8353 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS, |
| 8354 | "NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS - eflags", kernel_policy->cond_bound_interface_eflags, bound_interface_eflags); |
| 8355 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS, |
| 8356 | "NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS - xflags", kernel_policy->cond_bound_interface_xflags, bound_interface_xflags); |
| 8357 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) { |
| 8358 | if ((kernel_policy->cond_bound_interface_flags && (bound_interface_flags & kernel_policy->cond_bound_interface_flags)) || |
| 8359 | (kernel_policy->cond_bound_interface_eflags && (bound_interface_eflags & kernel_policy->cond_bound_interface_eflags)) || |
| 8360 | (kernel_policy->cond_bound_interface_xflags && (bound_interface_xflags & kernel_policy->cond_bound_interface_xflags))) { |
| 8361 | // No match, matches some forbidden interface flags |
| 8362 | return FALSE; |
| 8363 | } |
| 8364 | } else { |
| 8365 | if ((kernel_policy->cond_bound_interface_flags && !(bound_interface_flags & kernel_policy->cond_bound_interface_flags)) || |
| 8366 | (kernel_policy->cond_bound_interface_eflags && !(bound_interface_eflags & kernel_policy->cond_bound_interface_eflags)) || |
| 8367 | (kernel_policy->cond_bound_interface_xflags && !(bound_interface_xflags & kernel_policy->cond_bound_interface_xflags))) { |
| 8368 | // No match, does not match some required interface xflags |
| 8369 | return FALSE; |
| 8370 | } |
| 8371 | } |
| 8372 | } |
| 8373 | if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) && |
| 8374 | !(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS)) { |
| 8375 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", false, "Requiring no bound interface", 0, bound_interface_index); |
| 8376 | if (bound_interface_index != 0) { |
| 8377 | // No match, requires a non-bound packet |
| 8378 | return FALSE; |
| 8379 | } |
| 8380 | } |
| 8381 | } |
| 8382 | |
| 8383 | if (kernel_policy->condition_mask == 0) { |
| 8384 | return TRUE; |
| 8385 | } |
| 8386 | |
| 8387 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_APP_ID) { |
| 8388 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_APP_ID, |
| 8389 | "NECP_KERNEL_CONDITION_APP_ID", kernel_policy->cond_app_id, app_id); |
| 8390 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_APP_ID) { |
| 8391 | if (app_id == kernel_policy->cond_app_id) { |
| 8392 | // No match, matches forbidden application |
| 8393 | return FALSE; |
| 8394 | } |
| 8395 | } else { |
| 8396 | if (app_id != kernel_policy->cond_app_id) { |
| 8397 | // No match, does not match required application |
| 8398 | return FALSE; |
| 8399 | } |
| 8400 | } |
| 8401 | |
| 8402 | // Check signing identifier only after APP ID matched |
| 8403 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER || |
| 8404 | kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) { |
| 8405 | u_int8_t matched = necp_boolean_state_false; |
| 8406 | const char *signing_id = cs_identity_get(proc ? proc : current_proc()); |
| 8407 | NECP_DATA_TRACE_LOG_CONDITION_STR(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER, |
| 8408 | "NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER", |
| 8409 | kernel_policy->cond_signing_identifier ? kernel_policy->cond_signing_identifier : "<n/a>", |
| 8410 | signing_id ? signing_id : "<n/a>"); |
| 8411 | if (signing_id != NULL) { |
| 8412 | size_t signing_id_size = strlen(s: signing_id) + 1; |
| 8413 | if (memcmp(s1: signing_id, s2: kernel_policy->cond_signing_identifier, n: signing_id_size) == 0) { |
| 8414 | matched = necp_boolean_state_true; |
| 8415 | } |
| 8416 | } |
| 8417 | |
| 8418 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_SIGNING_IDENTIFIER) { |
| 8419 | if (matched == necp_boolean_state_true) { |
| 8420 | return FALSE; |
| 8421 | } |
| 8422 | } else { |
| 8423 | if (matched != necp_boolean_state_true) { |
| 8424 | return FALSE; |
| 8425 | } |
| 8426 | } |
| 8427 | } |
| 8428 | } |
| 8429 | |
| 8430 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) { |
| 8431 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REAL_APP_ID, |
| 8432 | "NECP_KERNEL_CONDITION_REAL_APP_ID", |
| 8433 | kernel_policy->cond_real_app_id, real_app_id); |
| 8434 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) { |
| 8435 | if (real_app_id == kernel_policy->cond_real_app_id) { |
| 8436 | // No match, matches forbidden application |
| 8437 | return FALSE; |
| 8438 | } |
| 8439 | } else { |
| 8440 | if (real_app_id != kernel_policy->cond_real_app_id) { |
| 8441 | // No match, does not match required application |
| 8442 | return FALSE; |
| 8443 | } |
| 8444 | } |
| 8445 | } |
| 8446 | |
| 8447 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_HAS_CLIENT) { |
| 8448 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", false, "NECP_KERNEL_CONDITION_HAS_CLIENT", 0, has_client); |
| 8449 | if (!has_client) { |
| 8450 | return FALSE; |
| 8451 | } |
| 8452 | } |
| 8453 | |
| 8454 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT) { |
| 8455 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", false, "NECP_KERNEL_CONDITION_ENTITLEMENT", 0, is_entitled); |
| 8456 | if (!is_entitled) { |
| 8457 | // Process is missing entitlement |
| 8458 | return FALSE; |
| 8459 | } |
| 8460 | } |
| 8461 | |
| 8462 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY) { |
| 8463 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", false, "NECP_KERNEL_CONDITION_PLATFORM_BINARY", 0, is_platform_binary); |
| 8464 | if (is_platform_binary == 0) { |
| 8465 | // Process is not platform binary |
| 8466 | return FALSE; |
| 8467 | } |
| 8468 | } |
| 8469 | |
| 8470 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SYSTEM_SIGNED_RESULT) { |
| 8471 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", false, "NECP_KERNEL_CONDITION_SYSTEM_SIGNED_RESULT", 0, is_platform_binary); |
| 8472 | if (has_signed_result == 0) { |
| 8473 | // Client did not have a system-signed result |
| 8474 | return FALSE; |
| 8475 | } |
| 8476 | } |
| 8477 | |
| 8478 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SDK_VERSION) { |
| 8479 | if (proc != NULL) { |
| 8480 | NECP_DATA_TRACE_LOG_CONDITION3(debug, "SOCKET", false, "NECP_KERNEL_CONDITION_SDK_VERSION", |
| 8481 | kernel_policy->cond_sdk_version.platform, |
| 8482 | kernel_policy->cond_sdk_version.min_version, |
| 8483 | kernel_policy->cond_sdk_version.version, |
| 8484 | proc_platform(proc), |
| 8485 | proc_min_sdk(proc), |
| 8486 | proc_sdk(proc)); |
| 8487 | if (kernel_policy->cond_sdk_version.platform != 0) { |
| 8488 | if (kernel_policy->cond_sdk_version.platform != proc_platform(proc)) { |
| 8489 | // Process does not match platform |
| 8490 | return FALSE; |
| 8491 | } |
| 8492 | } |
| 8493 | |
| 8494 | if (kernel_policy->cond_sdk_version.min_version != 0) { |
| 8495 | if (kernel_policy->cond_sdk_version.min_version > proc_min_sdk(proc)) { |
| 8496 | // Process min version is older than required min version |
| 8497 | return FALSE; |
| 8498 | } |
| 8499 | } |
| 8500 | |
| 8501 | if (kernel_policy->cond_sdk_version.version != 0) { |
| 8502 | if (kernel_policy->cond_sdk_version.version > proc_sdk(proc)) { |
| 8503 | // Process SDK version is older than required version |
| 8504 | return FALSE; |
| 8505 | } |
| 8506 | } |
| 8507 | } |
| 8508 | } |
| 8509 | |
| 8510 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT) { |
| 8511 | NECP_DATA_TRACE_LOG_CONDITION_STR(debug, "SOCKET", false, "NECP_KERNEL_CONDITION_CUSTOM_ENTITLEMENT", "n/a", kernel_policy->cond_custom_entitlement); |
| 8512 | if (kernel_policy->cond_custom_entitlement != NULL) { |
| 8513 | if (proc == NULL) { |
| 8514 | // No process found, cannot check entitlement |
| 8515 | return FALSE; |
| 8516 | } |
| 8517 | task_t task = proc_task(proc); |
| 8518 | if (task == NULL || |
| 8519 | !IOTaskHasEntitlement(task, entitlement: kernel_policy->cond_custom_entitlement)) { |
| 8520 | // Process is missing custom entitlement |
| 8521 | return FALSE; |
| 8522 | } |
| 8523 | } |
| 8524 | } |
| 8525 | |
| 8526 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_EXACT_DOMAIN) { |
| 8527 | NECP_DATA_TRACE_LOG_CONDITION_STR(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_EXACT_DOMAIN, |
| 8528 | "NECP_KERNEL_CONDITION_EXACT_DOMAIN", kernel_policy->cond_domain, domain.string); |
| 8529 | // Exact match requires the number of dots to match (no suffix matching allowed) |
| 8530 | bool domain_matches = (domain_dot_count == kernel_policy->cond_domain_dot_count && |
| 8531 | necp_hostname_matches_domain(hostname_substring: domain, hostname_dot_count: domain_dot_count, domain: kernel_policy->cond_domain, domain_dot_count: kernel_policy->cond_domain_dot_count)); |
| 8532 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_EXACT_DOMAIN) { |
| 8533 | if (domain_matches) { |
| 8534 | // No match, matches forbidden domain |
| 8535 | return FALSE; |
| 8536 | } |
| 8537 | } else { |
| 8538 | if (!domain_matches) { |
| 8539 | // No match, does not match required domain |
| 8540 | return FALSE; |
| 8541 | } |
| 8542 | } |
| 8543 | } else if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_DOMAIN) { |
| 8544 | NECP_DATA_TRACE_LOG_CONDITION_STR(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_DOMAIN, |
| 8545 | "NECP_KERNEL_CONDITION_DOMAIN", kernel_policy->cond_domain, domain.string); |
| 8546 | bool domain_matches = necp_hostname_matches_domain(hostname_substring: domain, hostname_dot_count: domain_dot_count, domain: kernel_policy->cond_domain, domain_dot_count: kernel_policy->cond_domain_dot_count); |
| 8547 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_DOMAIN) { |
| 8548 | if (domain_matches) { |
| 8549 | // No match, matches forbidden domain |
| 8550 | return FALSE; |
| 8551 | } |
| 8552 | } else { |
| 8553 | if (!domain_matches) { |
| 8554 | // No match, does not match required domain |
| 8555 | return FALSE; |
| 8556 | } |
| 8557 | } |
| 8558 | } |
| 8559 | |
| 8560 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_DOMAIN_FILTER) { |
| 8561 | struct necp_domain_filter *filter = necp_lookup_domain_filter(list: &necp_global_domain_filter_list, filter_id: kernel_policy->cond_domain_filter); |
| 8562 | if (filter != NULL && filter->filter != NULL) { |
| 8563 | bool domain_matches = net_bloom_filter_contains(filter: filter->filter, buffer: domain.string, length: domain.length); |
| 8564 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_DOMAIN_FILTER) { |
| 8565 | if (domain_matches) { |
| 8566 | // No match, matches forbidden domain |
| 8567 | return FALSE; |
| 8568 | } |
| 8569 | } else { |
| 8570 | if (!domain_matches) { |
| 8571 | // No match, does not match required domain |
| 8572 | return FALSE; |
| 8573 | } |
| 8574 | } |
| 8575 | } |
| 8576 | } |
| 8577 | |
| 8578 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_URL) { |
| 8579 | NECP_DATA_TRACE_LOG_CONDITION_STR(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_URL, |
| 8580 | "NECP_KERNEL_CONDITION_URL", kernel_policy->cond_url, url); |
| 8581 | bool url_matches = (url ? strncasecmp(s1: kernel_policy->cond_url, s2: url, n: strlen(s: kernel_policy->cond_url)) == 0 : false); |
| 8582 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_URL) { |
| 8583 | if (url_matches) { |
| 8584 | // No match, matches forbidden url |
| 8585 | return FALSE; |
| 8586 | } |
| 8587 | } else { |
| 8588 | if (!url_matches) { |
| 8589 | // No match, does not match required url |
| 8590 | return FALSE; |
| 8591 | } |
| 8592 | } |
| 8593 | } |
| 8594 | |
| 8595 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID) { |
| 8596 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID, |
| 8597 | "NECP_KERNEL_CONDITION_ACCOUNT_ID", |
| 8598 | kernel_policy->cond_account_id, account_id); |
| 8599 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID) { |
| 8600 | if (account_id == kernel_policy->cond_account_id) { |
| 8601 | // No match, matches forbidden account |
| 8602 | return FALSE; |
| 8603 | } |
| 8604 | } else { |
| 8605 | if (account_id != kernel_policy->cond_account_id) { |
| 8606 | // No match, does not match required account |
| 8607 | return FALSE; |
| 8608 | } |
| 8609 | } |
| 8610 | } |
| 8611 | |
| 8612 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PID) { |
| 8613 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PID, |
| 8614 | "NECP_KERNEL_CONDITION_PID", |
| 8615 | kernel_policy->cond_pid, pid); |
| 8616 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PID) { |
| 8617 | if (pid == kernel_policy->cond_pid) { |
| 8618 | // No match, matches forbidden pid |
| 8619 | return FALSE; |
| 8620 | } |
| 8621 | if (kernel_policy->cond_pid_version != 0 && pid_version == kernel_policy->cond_pid_version) { |
| 8622 | return FALSE; |
| 8623 | } |
| 8624 | } else { |
| 8625 | if (pid != kernel_policy->cond_pid) { |
| 8626 | // No match, does not match required pid |
| 8627 | return FALSE; |
| 8628 | } |
| 8629 | if (kernel_policy->cond_pid_version != 0 && pid_version != kernel_policy->cond_pid_version) { |
| 8630 | return FALSE; |
| 8631 | } |
| 8632 | } |
| 8633 | } |
| 8634 | |
| 8635 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_UID) { |
| 8636 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_UID, |
| 8637 | "NECP_KERNEL_CONDITION_UID", |
| 8638 | kernel_policy->cond_uid, uid); |
| 8639 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_UID) { |
| 8640 | if (uid == kernel_policy->cond_uid) { |
| 8641 | // No match, matches forbidden uid |
| 8642 | return FALSE; |
| 8643 | } |
| 8644 | } else { |
| 8645 | if (uid != kernel_policy->cond_uid) { |
| 8646 | // No match, does not match required uid |
| 8647 | return FALSE; |
| 8648 | } |
| 8649 | } |
| 8650 | } |
| 8651 | |
| 8652 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_UID) { |
| 8653 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REAL_UID, |
| 8654 | "NECP_KERNEL_CONDITION_REAL_UID", |
| 8655 | kernel_policy->cond_real_uid, real_uid); |
| 8656 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REAL_UID) { |
| 8657 | if (real_uid == kernel_policy->cond_real_uid) { |
| 8658 | // No match, matches forbidden uid |
| 8659 | return FALSE; |
| 8660 | } |
| 8661 | } else { |
| 8662 | if (real_uid != kernel_policy->cond_real_uid) { |
| 8663 | // No match, does not match required uid |
| 8664 | return FALSE; |
| 8665 | } |
| 8666 | } |
| 8667 | } |
| 8668 | |
| 8669 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) { |
| 8670 | NECP_DATA_TRACE_LOG_CONDITION3(debug, "SOCKET", false, "NECP_KERNEL_CONDITION_TRAFFIC_CLASS", |
| 8671 | kernel_policy->cond_traffic_class.start_tc, kernel_policy->cond_traffic_class.end_tc, 0, |
| 8672 | traffic_class, 0, 0); |
| 8673 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) { |
| 8674 | if (traffic_class >= kernel_policy->cond_traffic_class.start_tc && |
| 8675 | traffic_class <= kernel_policy->cond_traffic_class.end_tc) { |
| 8676 | // No match, matches forbidden traffic class |
| 8677 | return FALSE; |
| 8678 | } |
| 8679 | } else { |
| 8680 | if (traffic_class < kernel_policy->cond_traffic_class.start_tc || |
| 8681 | traffic_class > kernel_policy->cond_traffic_class.end_tc) { |
| 8682 | // No match, does not match required traffic class |
| 8683 | return FALSE; |
| 8684 | } |
| 8685 | } |
| 8686 | } |
| 8687 | |
| 8688 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) { |
| 8689 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PROTOCOL, |
| 8690 | "NECP_KERNEL_CONDITION_PROTOCOL", |
| 8691 | kernel_policy->cond_protocol, protocol); |
| 8692 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PROTOCOL) { |
| 8693 | if (protocol == kernel_policy->cond_protocol) { |
| 8694 | // No match, matches forbidden protocol |
| 8695 | return FALSE; |
| 8696 | } |
| 8697 | } else { |
| 8698 | if (protocol != kernel_policy->cond_protocol) { |
| 8699 | // No match, does not match required protocol |
| 8700 | return FALSE; |
| 8701 | } |
| 8702 | } |
| 8703 | } |
| 8704 | |
| 8705 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_AGENT_TYPE) { |
| 8706 | NECP_DATA_TRACE_LOG_CONDITION_STR3(debug, "SOCKET", false, "NECP_KERNEL_CONDITION_AGENT_TYPE", |
| 8707 | kernel_policy->cond_agent_type.agent_domain, kernel_policy->cond_agent_type.agent_type, "n/a", |
| 8708 | "n/a", "n/a", "n/a"); |
| 8709 | bool matches_agent_type = FALSE; |
| 8710 | for (u_int32_t i = 0; i < num_required_agent_types; i++) { |
| 8711 | struct necp_client_parameter_netagent_type *required_agent_type = &required_agent_types[i]; |
| 8712 | if ((strlen(s: kernel_policy->cond_agent_type.agent_domain) == 0 || |
| 8713 | strncmp(s1: required_agent_type->netagent_domain, s2: kernel_policy->cond_agent_type.agent_domain, NETAGENT_DOMAINSIZE) == 0) && |
| 8714 | (strlen(s: kernel_policy->cond_agent_type.agent_type) == 0 || |
| 8715 | strncmp(s1: required_agent_type->netagent_type, s2: kernel_policy->cond_agent_type.agent_type, NETAGENT_TYPESIZE) == 0)) { |
| 8716 | // Found a required agent that matches |
| 8717 | matches_agent_type = TRUE; |
| 8718 | break; |
| 8719 | } |
| 8720 | } |
| 8721 | if (!matches_agent_type) { |
| 8722 | return FALSE; |
| 8723 | } |
| 8724 | } |
| 8725 | |
| 8726 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) { |
| 8727 | bool is_local = FALSE; |
| 8728 | |
| 8729 | if (rt != NULL) { |
| 8730 | is_local = IS_NECP_DEST_IN_LOCAL_NETWORKS(rt); |
| 8731 | } else { |
| 8732 | is_local = necp_is_route_local(remote_addr: remote); |
| 8733 | } |
| 8734 | if (info != NULL) { |
| 8735 | info->is_local = is_local; |
| 8736 | } |
| 8737 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", false, "NECP_KERNEL_CONDITION_LOCAL_NETWORKS", 0, is_local); |
| 8738 | if (!is_local) { |
| 8739 | // Either no route to validate or no match for local networks |
| 8740 | return FALSE; |
| 8741 | } |
| 8742 | } |
| 8743 | |
| 8744 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) { |
| 8745 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 8746 | bool inRange = necp_is_addr_in_range(addr: (struct sockaddr *)local, range_start: (struct sockaddr *)&kernel_policy->cond_local_start, range_end: (struct sockaddr *)&kernel_policy->cond_local_end); |
| 8747 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_END, "local address range", 0, 0); |
| 8748 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 8749 | if (inRange) { |
| 8750 | return FALSE; |
| 8751 | } |
| 8752 | } else { |
| 8753 | if (!inRange) { |
| 8754 | return FALSE; |
| 8755 | } |
| 8756 | } |
| 8757 | } else if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) { |
| 8758 | bool inSubnet = necp_is_addr_in_subnet(addr: (struct sockaddr *)local, subnet_addr: (struct sockaddr *)&kernel_policy->cond_local_start, subnet_prefix: kernel_policy->cond_local_prefix); |
| 8759 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX, "local address with prefix", 0, 0); |
| 8760 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) { |
| 8761 | if (inSubnet) { |
| 8762 | return FALSE; |
| 8763 | } |
| 8764 | } else { |
| 8765 | if (!inSubnet) { |
| 8766 | return FALSE; |
| 8767 | } |
| 8768 | } |
| 8769 | } |
| 8770 | } |
| 8771 | |
| 8772 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) { |
| 8773 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 8774 | bool inRange = necp_is_addr_in_range(addr: (struct sockaddr *)remote, range_start: (struct sockaddr *)&kernel_policy->cond_remote_start, range_end: (struct sockaddr *)&kernel_policy->cond_remote_end); |
| 8775 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_END, "remote address range", 0, 0); |
| 8776 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 8777 | if (inRange) { |
| 8778 | return FALSE; |
| 8779 | } |
| 8780 | } else { |
| 8781 | if (!inRange) { |
| 8782 | return FALSE; |
| 8783 | } |
| 8784 | } |
| 8785 | } else if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) { |
| 8786 | bool inSubnet = necp_is_addr_in_subnet(addr: (struct sockaddr *)remote, subnet_addr: (struct sockaddr *)&kernel_policy->cond_remote_start, subnet_prefix: kernel_policy->cond_remote_prefix); |
| 8787 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX, "remote address with prefix", 0, 0); |
| 8788 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) { |
| 8789 | if (inSubnet) { |
| 8790 | return FALSE; |
| 8791 | } |
| 8792 | } else { |
| 8793 | if (!inSubnet) { |
| 8794 | return FALSE; |
| 8795 | } |
| 8796 | } |
| 8797 | } |
| 8798 | } |
| 8799 | |
| 8800 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) { |
| 8801 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS, |
| 8802 | "NECP_KERNEL_CONDITION_CLIENT_FLAGS", |
| 8803 | kernel_policy->cond_client_flags, client_flags); |
| 8804 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) { |
| 8805 | if ((client_flags & kernel_policy->cond_client_flags) == kernel_policy->cond_client_flags) { |
| 8806 | // Flags do match, and condition is negative, fail. |
| 8807 | return FALSE; |
| 8808 | } |
| 8809 | } else { |
| 8810 | if ((client_flags & kernel_policy->cond_client_flags) != kernel_policy->cond_client_flags) { |
| 8811 | // Flags do not match, fail. |
| 8812 | return FALSE; |
| 8813 | } |
| 8814 | } |
| 8815 | } |
| 8816 | |
| 8817 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) { |
| 8818 | bool isEmpty = necp_addr_is_empty(addr: (struct sockaddr *)local); |
| 8819 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY, |
| 8820 | "NECP_KERNEL_CONDITION_LOCAL_EMPTY", |
| 8821 | 0, isEmpty); |
| 8822 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_EMPTY) { |
| 8823 | if (isEmpty) { |
| 8824 | return FALSE; |
| 8825 | } |
| 8826 | } else { |
| 8827 | if (!isEmpty) { |
| 8828 | return FALSE; |
| 8829 | } |
| 8830 | } |
| 8831 | } |
| 8832 | |
| 8833 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY) { |
| 8834 | bool isEmpty = necp_addr_is_empty(addr: (struct sockaddr *)remote); |
| 8835 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY, |
| 8836 | "NECP_KERNEL_CONDITION_REMOTE_EMPTY", |
| 8837 | 0, isEmpty); |
| 8838 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_EMPTY) { |
| 8839 | if (isEmpty) { |
| 8840 | return FALSE; |
| 8841 | } |
| 8842 | } else { |
| 8843 | if (!isEmpty) { |
| 8844 | return FALSE; |
| 8845 | } |
| 8846 | } |
| 8847 | } |
| 8848 | |
| 8849 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SCHEME_PORT) { |
| 8850 | u_int16_t remote_port = 0; |
| 8851 | if (((struct sockaddr *)remote)->sa_family == AF_INET || ((struct sockaddr *)remote)->sa_family == AF_INET6) { |
| 8852 | remote_port = ((struct sockaddr_in *)remote)->sin_port; |
| 8853 | } |
| 8854 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_SCHEME_PORT, |
| 8855 | "NECP_KERNEL_CONDITION_SCHEME_PORT", |
| 8856 | scheme_port, remote_port); |
| 8857 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_SCHEME_PORT) { |
| 8858 | if (kernel_policy->cond_scheme_port == scheme_port || |
| 8859 | kernel_policy->cond_scheme_port == remote_port) { |
| 8860 | return FALSE; |
| 8861 | } |
| 8862 | } else { |
| 8863 | if (kernel_policy->cond_scheme_port != scheme_port && |
| 8864 | kernel_policy->cond_scheme_port != remote_port) { |
| 8865 | return FALSE; |
| 8866 | } |
| 8867 | } |
| 8868 | } |
| 8869 | |
| 8870 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) { |
| 8871 | NECP_DATA_TRACE_LOG_CONDITION(debug, "SOCKET", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS, |
| 8872 | "NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS", |
| 8873 | kernel_policy->cond_packet_filter_tags, |
| 8874 | pf_tag); |
| 8875 | bool tags_matched = false; |
| 8876 | if (kernel_policy->cond_packet_filter_tags & NECP_POLICY_CONDITION_PACKET_FILTER_TAG_STACK_DROP) { |
| 8877 | if (pf_tag == PF_TAG_ID_STACK_DROP) { |
| 8878 | tags_matched = true; |
| 8879 | } |
| 8880 | } |
| 8881 | |
| 8882 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) { |
| 8883 | if (tags_matched) { |
| 8884 | return FALSE; |
| 8885 | } |
| 8886 | } else { |
| 8887 | if (!tags_matched) { |
| 8888 | return FALSE; |
| 8889 | } |
| 8890 | } |
| 8891 | } |
| 8892 | |
| 8893 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_IS_LOOPBACK) { |
| 8894 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_IS_LOOPBACK) { |
| 8895 | if (is_loopback) { |
| 8896 | return FALSE; |
| 8897 | } |
| 8898 | } else { |
| 8899 | if (!is_loopback) { |
| 8900 | return FALSE; |
| 8901 | } |
| 8902 | } |
| 8903 | } |
| 8904 | |
| 8905 | if (is_delegated && (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY)) { |
| 8906 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY) { |
| 8907 | if (real_is_platform_binary) { |
| 8908 | return FALSE; |
| 8909 | } |
| 8910 | } else { |
| 8911 | if (!real_is_platform_binary) { |
| 8912 | return FALSE; |
| 8913 | } |
| 8914 | } |
| 8915 | } |
| 8916 | |
| 8917 | return TRUE; |
| 8918 | } |
| 8919 | |
| 8920 | static inline u_int32_t |
| 8921 | necp_socket_calc_flowhash_locked(struct necp_socket_info *info) |
| 8922 | { |
| 8923 | return net_flowhash(info, sizeof(*info), necp_kernel_socket_policies_gencount); |
| 8924 | } |
| 8925 | |
| 8926 | static void |
| 8927 | necp_socket_fillout_info_locked(struct inpcb *inp, struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, u_int32_t override_bound_interface, bool override_is_inbound, u_int32_t drop_order, proc_t *socket_proc, struct necp_socket_info *info, bool is_loopback) |
| 8928 | { |
| 8929 | struct socket *so = NULL; |
| 8930 | proc_t sock_proc = NULL; |
| 8931 | proc_t curr_proc = current_proc(); |
| 8932 | |
| 8933 | memset(s: info, c: 0, n: sizeof(struct necp_socket_info)); |
| 8934 | |
| 8935 | so = inp->inp_socket; |
| 8936 | |
| 8937 | info->drop_order = drop_order; |
| 8938 | info->is_loopback = is_loopback; |
| 8939 | info->is_delegated = ((so->so_flags & SOF_DELEGATED) ? true : false); |
| 8940 | |
| 8941 | if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_UID || |
| 8942 | necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_REAL_UID) { |
| 8943 | info->uid = kauth_cred_getuid(cred: so->so_cred); |
| 8944 | info->real_uid = info->uid; |
| 8945 | } |
| 8946 | |
| 8947 | if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_TRAFFIC_CLASS) { |
| 8948 | info->traffic_class = so->so_traffic_class; |
| 8949 | } |
| 8950 | |
| 8951 | if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_HAS_CLIENT) { |
| 8952 | info->has_client = !uuid_is_null(uu: inp->necp_client_uuid); |
| 8953 | } |
| 8954 | |
| 8955 | if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_CLIENT_FLAGS) { |
| 8956 | info->client_flags = 0; |
| 8957 | if (INP_NO_CONSTRAINED(inp)) { |
| 8958 | info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_CONSTRAINED; |
| 8959 | } |
| 8960 | if (INP_NO_EXPENSIVE(inp)) { |
| 8961 | info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_EXPENSIVE; |
| 8962 | } |
| 8963 | if (inp->inp_socket->so_flags1 & SOF1_CELLFALLBACK) { |
| 8964 | info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_FALLBACK_TRAFFIC; |
| 8965 | } |
| 8966 | if (inp->inp_socket->so_flags1 & SOF1_KNOWN_TRACKER) { |
| 8967 | info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_KNOWN_TRACKER; |
| 8968 | } |
| 8969 | if (inp->inp_socket->so_flags1 & SOF1_APPROVED_APP_DOMAIN) { |
| 8970 | info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_APPROVED_APP_DOMAIN; |
| 8971 | } |
| 8972 | if (inp->inp_socket->so_flags1 & SOF1_INBOUND || override_is_inbound) { |
| 8973 | info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_INBOUND; |
| 8974 | } |
| 8975 | if (inp->inp_socket->so_options & SO_ACCEPTCONN || |
| 8976 | inp->inp_flags2 & INP2_EXTERNAL_PORT) { |
| 8977 | info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_LISTENER; |
| 8978 | } |
| 8979 | if (inp->inp_socket->so_options & SO_NOWAKEFROMSLEEP) { |
| 8980 | info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_NO_WAKE_FROM_SLEEP; |
| 8981 | } |
| 8982 | if (inp->inp_socket->so_options & SO_REUSEPORT) { |
| 8983 | info->client_flags |= NECP_CLIENT_PARAMETER_FLAG_REUSE_LOCAL; |
| 8984 | } |
| 8985 | } |
| 8986 | |
| 8987 | if ((necp_data_tracing_level && necp_data_tracing_proto) || |
| 8988 | necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) { |
| 8989 | if (inp->inp_ip_p) { |
| 8990 | info->protocol = inp->inp_ip_p; |
| 8991 | } else { |
| 8992 | info->protocol = SOCK_PROTO(so); |
| 8993 | } |
| 8994 | } |
| 8995 | |
| 8996 | if (inp->inp_flags2 & INP2_WANT_APP_POLICY && necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_APP_ID) { |
| 8997 | u_int32_t responsible_application_id = 0; |
| 8998 | |
| 8999 | struct necp_uuid_id_mapping *existing_mapping = necp_uuid_lookup_app_id_locked(uuid: ((so->so_flags & SOF_DELEGATED) ? so->e_uuid : so->last_uuid)); |
| 9000 | if (existing_mapping) { |
| 9001 | info->application_id = existing_mapping->id; |
| 9002 | } |
| 9003 | |
| 9004 | #if defined(XNU_TARGET_OS_OSX) |
| 9005 | if (so->so_rpid > 0) { |
| 9006 | existing_mapping = necp_uuid_lookup_app_id_locked(uuid: so->so_ruuid); |
| 9007 | if (existing_mapping != NULL) { |
| 9008 | responsible_application_id = existing_mapping->id; |
| 9009 | } |
| 9010 | } |
| 9011 | #endif |
| 9012 | |
| 9013 | if (responsible_application_id > 0) { |
| 9014 | info->real_application_id = info->application_id; |
| 9015 | info->application_id = responsible_application_id; |
| 9016 | info->used_responsible_pid = true; |
| 9017 | } else if (!(so->so_flags & SOF_DELEGATED)) { |
| 9018 | info->real_application_id = info->application_id; |
| 9019 | } else if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID) { |
| 9020 | struct necp_uuid_id_mapping *real_existing_mapping = necp_uuid_lookup_app_id_locked(uuid: so->last_uuid); |
| 9021 | if (real_existing_mapping) { |
| 9022 | info->real_application_id = real_existing_mapping->id; |
| 9023 | } |
| 9024 | } |
| 9025 | } |
| 9026 | |
| 9027 | pid_t socket_pid = |
| 9028 | #if defined(XNU_TARGET_OS_OSX) |
| 9029 | info->used_responsible_pid ? so->so_rpid : |
| 9030 | #endif |
| 9031 | ((so->so_flags & SOF_DELEGATED) ? so->e_pid : so->last_pid); |
| 9032 | if (socket_pid && (socket_pid != proc_pid(curr_proc))) { |
| 9033 | sock_proc = proc_find(pid: socket_pid); |
| 9034 | if (socket_proc) { |
| 9035 | *socket_proc = sock_proc; |
| 9036 | } |
| 9037 | } |
| 9038 | |
| 9039 | if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_ENTITLEMENT) { |
| 9040 | const task_t task = proc_task(sock_proc != NULL ? sock_proc : curr_proc); |
| 9041 | info->is_entitled = necp_task_has_match_entitlement(task); |
| 9042 | if (!info->is_entitled) { |
| 9043 | // Task does not have entitlement, check the parent task |
| 9044 | necp_get_parent_is_entitled(task, info); |
| 9045 | } |
| 9046 | } |
| 9047 | |
| 9048 | if ((necp_data_tracing_level && necp_data_tracing_pid) || |
| 9049 | (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_PID)) { |
| 9050 | info->pid = socket_pid; |
| 9051 | info->pid_version = proc_pidversion(sock_proc != NULL ? sock_proc : curr_proc); |
| 9052 | } |
| 9053 | |
| 9054 | if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_PLATFORM_BINARY) { |
| 9055 | info->is_platform_binary = necp_is_platform_binary(proc: sock_proc ? sock_proc : curr_proc) ? true : false; |
| 9056 | } |
| 9057 | |
| 9058 | if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_DELEGATE_IS_PLATFORM_BINARY) { |
| 9059 | proc_t real_proc = curr_proc; |
| 9060 | bool release_real_proc = false; |
| 9061 | if (so->last_pid != proc_pid(real_proc)) { |
| 9062 | if (so->last_pid == socket_pid && sock_proc != NULL) { |
| 9063 | real_proc = sock_proc; |
| 9064 | } else { |
| 9065 | proc_t last_proc = proc_find(pid: so->last_pid); |
| 9066 | if (last_proc != NULL) { |
| 9067 | real_proc = last_proc; |
| 9068 | release_real_proc = true; |
| 9069 | } |
| 9070 | } |
| 9071 | } |
| 9072 | if (real_proc != NULL) { |
| 9073 | info->real_is_platform_binary = (necp_is_platform_binary(proc: real_proc) ? true : false); |
| 9074 | if (release_real_proc) { |
| 9075 | proc_rele(p: real_proc); |
| 9076 | } |
| 9077 | } |
| 9078 | } |
| 9079 | |
| 9080 | if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_ACCOUNT_ID && inp->inp_necp_attributes.inp_account != NULL) { |
| 9081 | struct necp_string_id_mapping *existing_mapping = necp_lookup_string_to_id_locked(list: &necp_account_id_list, string: inp->inp_necp_attributes.inp_account); |
| 9082 | if (existing_mapping) { |
| 9083 | info->account_id = existing_mapping->id; |
| 9084 | } |
| 9085 | } |
| 9086 | |
| 9087 | if ((necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_DOMAIN) || |
| 9088 | (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_EXACT_DOMAIN) || |
| 9089 | (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_DOMAIN_FILTER)) { |
| 9090 | info->domain = inp->inp_necp_attributes.inp_domain; |
| 9091 | } |
| 9092 | |
| 9093 | if (override_bound_interface) { |
| 9094 | info->bound_interface_index = override_bound_interface; |
| 9095 | } else { |
| 9096 | if ((inp->inp_flags & INP_BOUND_IF) && inp->inp_boundifp) { |
| 9097 | info->bound_interface_index = inp->inp_boundifp->if_index; |
| 9098 | } |
| 9099 | } |
| 9100 | |
| 9101 | if ((necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) && |
| 9102 | info->bound_interface_index != IFSCOPE_NONE) { |
| 9103 | ifnet_head_lock_shared(); |
| 9104 | ifnet_t interface = ifindex2ifnet[info->bound_interface_index]; |
| 9105 | if (interface != NULL) { |
| 9106 | info->bound_interface_flags = interface->if_flags; |
| 9107 | info->bound_interface_eflags = interface->if_eflags; |
| 9108 | info->bound_interface_xflags = interface->if_xflags; |
| 9109 | } |
| 9110 | ifnet_head_done(); |
| 9111 | } |
| 9112 | |
| 9113 | bool needs_address_for_signature = ((necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_SYSTEM_SIGNED_RESULT) && |
| 9114 | uuid_is_null(uu: inp->necp_client_uuid) && |
| 9115 | necp_socket_has_resolver_signature(inp)); |
| 9116 | if ((necp_data_tracing_level && necp_data_tracing_port) || |
| 9117 | necp_restrict_multicast || |
| 9118 | needs_address_for_signature || |
| 9119 | (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_ADDRESS_TYPE_CONDITIONS)) { |
| 9120 | if (override_local_addr != NULL) { |
| 9121 | if (override_local_addr->sa_family == AF_INET6 && override_local_addr->sa_len <= sizeof(struct sockaddr_in6)) { |
| 9122 | memcpy(dst: &info->local_addr, src: override_local_addr, n: override_local_addr->sa_len); |
| 9123 | if (IN6_IS_ADDR_V4MAPPED(&(info->local_addr.sin6.sin6_addr))) { |
| 9124 | struct sockaddr_in sin; |
| 9125 | in6_sin6_2_sin(sin: &sin, sin6: &(info->local_addr.sin6)); |
| 9126 | memset(s: &info->local_addr, c: 0, n: sizeof(union necp_sockaddr_union)); |
| 9127 | memcpy(dst: &info->local_addr, src: &sin, n: sin.sin_len); |
| 9128 | } |
| 9129 | } else if (override_local_addr->sa_family == AF_INET && override_local_addr->sa_len <= sizeof(struct sockaddr_in)) { |
| 9130 | memcpy(dst: &info->local_addr, src: override_local_addr, n: override_local_addr->sa_len); |
| 9131 | } |
| 9132 | } else { |
| 9133 | if (inp->inp_vflag & INP_IPV6) { |
| 9134 | ((struct sockaddr_in6 *)&info->local_addr)->sin6_family = AF_INET6; |
| 9135 | ((struct sockaddr_in6 *)&info->local_addr)->sin6_len = sizeof(struct sockaddr_in6); |
| 9136 | ((struct sockaddr_in6 *)&info->local_addr)->sin6_port = inp->inp_lport; |
| 9137 | memcpy(dst: &((struct sockaddr_in6 *)&info->local_addr)->sin6_addr, src: &inp->in6p_laddr, n: sizeof(struct in6_addr)); |
| 9138 | } else if (inp->inp_vflag & INP_IPV4) { |
| 9139 | ((struct sockaddr_in *)&info->local_addr)->sin_family = AF_INET; |
| 9140 | ((struct sockaddr_in *)&info->local_addr)->sin_len = sizeof(struct sockaddr_in); |
| 9141 | ((struct sockaddr_in *)&info->local_addr)->sin_port = inp->inp_lport; |
| 9142 | memcpy(dst: &((struct sockaddr_in *)&info->local_addr)->sin_addr, src: &inp->inp_laddr, n: sizeof(struct in_addr)); |
| 9143 | } |
| 9144 | } |
| 9145 | |
| 9146 | if (override_remote_addr != NULL) { |
| 9147 | if (override_remote_addr->sa_family == AF_INET6 && override_remote_addr->sa_len <= sizeof(struct sockaddr_in6)) { |
| 9148 | memcpy(dst: &info->remote_addr, src: override_remote_addr, n: override_remote_addr->sa_len); |
| 9149 | if (IN6_IS_ADDR_V4MAPPED(&(info->remote_addr.sin6.sin6_addr))) { |
| 9150 | struct sockaddr_in sin; |
| 9151 | in6_sin6_2_sin(sin: &sin, sin6: &(info->remote_addr.sin6)); |
| 9152 | memset(s: &info->remote_addr, c: 0, n: sizeof(union necp_sockaddr_union)); |
| 9153 | memcpy(dst: &info->remote_addr, src: &sin, n: sin.sin_len); |
| 9154 | } |
| 9155 | } else if (override_remote_addr->sa_family == AF_INET && override_remote_addr->sa_len <= sizeof(struct sockaddr_in)) { |
| 9156 | memcpy(dst: &info->remote_addr, src: override_remote_addr, n: override_remote_addr->sa_len); |
| 9157 | } |
| 9158 | } else { |
| 9159 | if (inp->inp_vflag & INP_IPV6) { |
| 9160 | ((struct sockaddr_in6 *)&info->remote_addr)->sin6_family = AF_INET6; |
| 9161 | ((struct sockaddr_in6 *)&info->remote_addr)->sin6_len = sizeof(struct sockaddr_in6); |
| 9162 | ((struct sockaddr_in6 *)&info->remote_addr)->sin6_port = inp->inp_fport; |
| 9163 | memcpy(dst: &((struct sockaddr_in6 *)&info->remote_addr)->sin6_addr, src: &inp->in6p_faddr, n: sizeof(struct in6_addr)); |
| 9164 | } else if (inp->inp_vflag & INP_IPV4) { |
| 9165 | ((struct sockaddr_in *)&info->remote_addr)->sin_family = AF_INET; |
| 9166 | ((struct sockaddr_in *)&info->remote_addr)->sin_len = sizeof(struct sockaddr_in); |
| 9167 | ((struct sockaddr_in *)&info->remote_addr)->sin_port = inp->inp_fport; |
| 9168 | memcpy(dst: &((struct sockaddr_in *)&info->remote_addr)->sin_addr, src: &inp->inp_faddr, n: sizeof(struct in_addr)); |
| 9169 | } |
| 9170 | } |
| 9171 | // Clear the embedded scope id from v6 addresses |
| 9172 | if (info->local_addr.sa.sa_family == AF_INET6) { |
| 9173 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&info->local_addr; |
| 9174 | if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr) && in6_embedded_scope) { |
| 9175 | if (sin6->sin6_addr.s6_addr16[1] != 0) { |
| 9176 | sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); |
| 9177 | sin6->sin6_addr.s6_addr16[1] = 0; |
| 9178 | } |
| 9179 | } |
| 9180 | } |
| 9181 | if (info->remote_addr.sa.sa_family == AF_INET6) { |
| 9182 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&info->remote_addr; |
| 9183 | if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr) && in6_embedded_scope) { |
| 9184 | if (sin6->sin6_addr.s6_addr16[1] != 0) { |
| 9185 | sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); |
| 9186 | sin6->sin6_addr.s6_addr16[1] = 0; |
| 9187 | } |
| 9188 | } |
| 9189 | } |
| 9190 | } |
| 9191 | |
| 9192 | if (necp_kernel_socket_policies_condition_mask & NECP_KERNEL_CONDITION_SYSTEM_SIGNED_RESULT) { |
| 9193 | // For checking sockets, only validate that there is an NECP client present. It will have |
| 9194 | // already checked for the signature. |
| 9195 | if (!uuid_is_null(uu: inp->necp_client_uuid)) { |
| 9196 | info->has_system_signed_result = true; |
| 9197 | } else { |
| 9198 | info->has_system_signed_result = necp_socket_resolver_signature_matches_address(inp, address: &info->remote_addr); |
| 9199 | } |
| 9200 | } |
| 9201 | } |
| 9202 | |
| 9203 | #define IS_NECP_KERNEL_POLICY_IP_RESULT(result) (result == NECP_KERNEL_POLICY_RESULT_PASS || result == NECP_KERNEL_POLICY_RESULT_DROP || result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL || result == NECP_KERNEL_POLICY_RESULT_ROUTE_RULES) |
| 9204 | |
| 9205 | static inline struct necp_kernel_socket_policy * |
| 9206 | necp_socket_find_policy_match_with_info_locked(struct necp_kernel_socket_policy **policy_search_array, struct necp_socket_info *info, |
| 9207 | necp_kernel_policy_filter *return_filter, |
| 9208 | u_int32_t *return_route_rule_id_array, size_t *return_route_rule_id_array_count, size_t route_rule_id_array_count, |
| 9209 | necp_kernel_policy_result *return_service_action, necp_kernel_policy_service *return_service, |
| 9210 | u_int32_t *return_netagent_array, u_int32_t *return_netagent_use_flags_array, size_t netagent_array_count, |
| 9211 | struct necp_client_parameter_netagent_type *required_agent_types, |
| 9212 | u_int32_t num_required_agent_types, proc_t proc, u_int16_t pf_tag, necp_kernel_policy_id *skip_policy_id, struct rtentry *rt, |
| 9213 | necp_kernel_policy_result *return_drop_dest_policy_result, necp_drop_all_bypass_check_result_t *return_drop_all_bypass, |
| 9214 | u_int32_t *return_flow_divert_aggregate_unit, struct socket *so, int debug) |
| 9215 | { |
| 9216 | struct necp_kernel_socket_policy *matched_policy = NULL; |
| 9217 | u_int32_t skip_order = 0; |
| 9218 | u_int32_t skip_session_order = 0; |
| 9219 | bool skipped_ip_result = false; |
| 9220 | size_t route_rule_id_count = 0; |
| 9221 | int i; |
| 9222 | u_int32_t netagent_ids[NECP_MAX_NETAGENTS]; |
| 9223 | u_int32_t netagent_use_flags[NECP_MAX_NETAGENTS]; |
| 9224 | memset(s: &netagent_ids, c: 0, n: sizeof(netagent_ids)); |
| 9225 | memset(s: &netagent_use_flags, c: 0, n: sizeof(netagent_use_flags)); |
| 9226 | size_t netagent_cursor = 0; |
| 9227 | necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE; |
| 9228 | if (return_drop_all_bypass != NULL) { |
| 9229 | *return_drop_all_bypass = drop_all_bypass; |
| 9230 | } |
| 9231 | |
| 9232 | if (netagent_array_count > NECP_MAX_NETAGENTS) { |
| 9233 | netagent_array_count = NECP_MAX_NETAGENTS; |
| 9234 | } |
| 9235 | |
| 9236 | // Pre-process domain for quick matching |
| 9237 | struct substring domain_substring = necp_trim_dots_and_stars(string: info->domain, length: info->domain ? strlen(s: info->domain) : 0); |
| 9238 | u_int8_t domain_dot_count = necp_count_dots(string: domain_substring.string, length: domain_substring.length); |
| 9239 | |
| 9240 | if (return_filter != NULL) { |
| 9241 | *return_filter = 0; |
| 9242 | } |
| 9243 | |
| 9244 | if (return_route_rule_id_array_count != NULL) { |
| 9245 | *return_route_rule_id_array_count = 0; |
| 9246 | } |
| 9247 | |
| 9248 | if (return_service_action != NULL) { |
| 9249 | *return_service_action = 0; |
| 9250 | } |
| 9251 | |
| 9252 | if (return_service != NULL) { |
| 9253 | return_service->identifier = 0; |
| 9254 | return_service->data = 0; |
| 9255 | } |
| 9256 | |
| 9257 | // Do not subject layer-2 filter to NECP policies, return a PASS policy |
| 9258 | if (necp_pass_interpose > 0 && info->client_flags & NECP_CLIENT_PARAMETER_FLAG_INTERPOSE) { |
| 9259 | return &pass_policy; |
| 9260 | } |
| 9261 | |
| 9262 | *return_drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE; |
| 9263 | |
| 9264 | if (policy_search_array != NULL) { |
| 9265 | for (i = 0; policy_search_array[i] != NULL; i++) { |
| 9266 | NECP_DATA_TRACE_LOG_POLICY(debug, "SOCKET", "EXAMINING"); |
| 9267 | |
| 9268 | if (necp_drop_all_order != 0 && policy_search_array[i]->session_order >= necp_drop_all_order) { |
| 9269 | // We've hit a drop all rule |
| 9270 | if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) { |
| 9271 | drop_all_bypass = necp_check_drop_all_bypass_result(proc); |
| 9272 | if (return_drop_all_bypass != NULL) { |
| 9273 | *return_drop_all_bypass = drop_all_bypass; |
| 9274 | } |
| 9275 | } |
| 9276 | if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) { |
| 9277 | NECP_DATA_TRACE_LOG_SOCKET_RESULT(debug, so, "SOCKET", "RESULT - DROP - (session order > drop-all order)"); |
| 9278 | break; |
| 9279 | } |
| 9280 | } |
| 9281 | if (necp_drop_dest_policy.entry_count != 0 && |
| 9282 | necp_address_matches_drop_dest_policy(&info->remote_addr, policy_search_array[i]->session_order)) { |
| 9283 | // We've hit a drop by destination address rule |
| 9284 | *return_drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 9285 | break; |
| 9286 | } |
| 9287 | if (info->drop_order != 0 && policy_search_array[i]->session_order >= info->drop_order) { |
| 9288 | // We've hit a drop order for this socket |
| 9289 | break; |
| 9290 | } |
| 9291 | if (skip_session_order && policy_search_array[i]->session_order >= skip_session_order) { |
| 9292 | // Done skipping |
| 9293 | skip_order = 0; |
| 9294 | skip_session_order = 0; |
| 9295 | // If we didn't skip any policy with IP result, no need to save the skip for IP evaluation. |
| 9296 | if (skip_policy_id && *skip_policy_id != NECP_KERNEL_POLICY_ID_NONE && !skipped_ip_result) { |
| 9297 | *skip_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 9298 | NECP_DATA_TRACE_LOG_POLICY(debug, "SOCKET", "SKIP (cleared saved skip)"); |
| 9299 | } |
| 9300 | } |
| 9301 | if (skip_order) { |
| 9302 | if (policy_search_array[i]->order < skip_order) { |
| 9303 | // Skip this policy |
| 9304 | // Remember if we skipped an interesting PASS/DROP/IP_TUNNEL/ROUTE_RULES policy. If we |
| 9305 | // didn't, clear out the return value for skip ID when we are done with each session.' |
| 9306 | if (IS_NECP_KERNEL_POLICY_IP_RESULT(policy_search_array[i]->result)) { |
| 9307 | skipped_ip_result = true; |
| 9308 | NECP_DATA_TRACE_LOG_POLICY(debug, "SOCKET", "SKIPPING IP RESULT"); |
| 9309 | } |
| 9310 | NECP_DATA_TRACE_LOG_POLICY(debug, "SOCKET", "SKIP (session order < skip-order)"); |
| 9311 | continue; |
| 9312 | } else { |
| 9313 | // Done skipping |
| 9314 | skip_order = 0; |
| 9315 | skip_session_order = 0; |
| 9316 | } |
| 9317 | } else if (skip_session_order) { |
| 9318 | // Skip this policy |
| 9319 | // Remember if we skipped an interesting PASS/DROP/IP_TUNNEL/ROUTE_RULES policy. If we |
| 9320 | // didn't, clear out the return value for skip ID when we are done with each session.' |
| 9321 | if (IS_NECP_KERNEL_POLICY_IP_RESULT(policy_search_array[i]->result)) { |
| 9322 | skipped_ip_result = true; |
| 9323 | NECP_DATA_TRACE_LOG_POLICY(debug, "SOCKET", "SKIPPING IP RESULT"); |
| 9324 | } |
| 9325 | NECP_DATA_TRACE_LOG_POLICY(debug, "SOCKET", "SKIP (skip-session-order)"); |
| 9326 | continue; |
| 9327 | } |
| 9328 | |
| 9329 | if (necp_socket_check_policy(kernel_policy: policy_search_array[i], app_id: info->application_id, real_app_id: info->real_application_id, is_entitled: info->is_entitled, account_id: info->account_id, domain: domain_substring, domain_dot_count, url: info->url, pid: info->pid, pid_version: info->pid_version, uid: info->uid, real_uid: info->real_uid, bound_interface_index: info->bound_interface_index, traffic_class: info->traffic_class, protocol: info->protocol, local: &info->local_addr, remote: &info->remote_addr, required_agent_types, num_required_agent_types, has_client: info->has_client, client_flags: info->client_flags, is_platform_binary: info->is_platform_binary, has_signed_result: info->has_system_signed_result, proc, pf_tag, scheme_port: info->scheme_port, rt, is_loopback: info->is_loopback, debug, real_is_platform_binary: info->real_is_platform_binary, bound_interface_flags: info->bound_interface_flags, bound_interface_eflags: info->bound_interface_eflags, bound_interface_xflags: info->bound_interface_xflags, info, is_delegated: info->is_delegated)) { |
| 9330 | if (!debug && necp_data_tracing_session_order) { |
| 9331 | if ((necp_data_tracing_session_order == policy_search_array[i]->session_order) && |
| 9332 | (!necp_data_tracing_policy_order || (necp_data_tracing_policy_order == policy_search_array[i]->order))) { |
| 9333 | NECP_DATA_TRACE_LOG_SOCKET_RESULT(true, so, "SOCKET", "DEBUG - MATCHED POLICY"); |
| 9334 | } |
| 9335 | } |
| 9336 | |
| 9337 | if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_SOCKET_FILTER) { |
| 9338 | if (return_filter && *return_filter != NECP_FILTER_UNIT_NO_FILTER) { |
| 9339 | necp_kernel_policy_filter control_unit = policy_search_array[i]->result_parameter.filter_control_unit; |
| 9340 | if (control_unit == NECP_FILTER_UNIT_NO_FILTER) { |
| 9341 | *return_filter = control_unit; |
| 9342 | } else { |
| 9343 | // Preserve pre-existing connections only if all filters preserve. |
| 9344 | bool preserve_bit_off = false; |
| 9345 | if ((*return_filter && !(*return_filter & NECP_MASK_PRESERVE_CONNECTIONS)) || |
| 9346 | (control_unit && !(control_unit & NECP_MASK_PRESERVE_CONNECTIONS))) { |
| 9347 | preserve_bit_off = true; |
| 9348 | } |
| 9349 | *return_filter |= control_unit; |
| 9350 | if (preserve_bit_off == true) { |
| 9351 | *return_filter &= ~NECP_MASK_PRESERVE_CONNECTIONS; |
| 9352 | } |
| 9353 | } |
| 9354 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9355 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) Filter %d", info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, policy_search_array[i]->result_parameter.filter_control_unit); |
| 9356 | } |
| 9357 | } |
| 9358 | continue; |
| 9359 | } else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_ROUTE_RULES) { |
| 9360 | if (return_route_rule_id_array && route_rule_id_count < route_rule_id_array_count) { |
| 9361 | return_route_rule_id_array[route_rule_id_count++] = policy_search_array[i]->result_parameter.route_rule_id; |
| 9362 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9363 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) Route Rule %d", info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, policy_search_array[i]->result_parameter.route_rule_id); |
| 9364 | } |
| 9365 | } |
| 9366 | continue; |
| 9367 | } else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_USE_NETAGENT || |
| 9368 | policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED) { |
| 9369 | if (netagent_cursor < netagent_array_count) { |
| 9370 | bool agent_already_present = false; |
| 9371 | for (size_t netagent_i = 0; netagent_i < netagent_cursor; netagent_i++) { |
| 9372 | if (netagent_ids[netagent_i] == policy_search_array[i]->result_parameter.netagent_id) { |
| 9373 | // Already present. Mark the "SCOPED" flag if flags are necessary. |
| 9374 | agent_already_present = true; |
| 9375 | if (!(netagent_use_flags[netagent_i] & NECP_AGENT_USE_FLAG_REMOVE) && |
| 9376 | policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED) { |
| 9377 | netagent_use_flags[netagent_i] |= NECP_AGENT_USE_FLAG_SCOPE; |
| 9378 | } |
| 9379 | } |
| 9380 | } |
| 9381 | |
| 9382 | if (!agent_already_present) { |
| 9383 | netagent_ids[netagent_cursor] = policy_search_array[i]->result_parameter.netagent_id; |
| 9384 | if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED) { |
| 9385 | netagent_use_flags[netagent_cursor] |= NECP_AGENT_USE_FLAG_SCOPE; |
| 9386 | } |
| 9387 | netagent_cursor++; |
| 9388 | } |
| 9389 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9390 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) %s Netagent %d", |
| 9391 | info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, |
| 9392 | policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_USE_NETAGENT ? "Use": "Scope", |
| 9393 | policy_search_array[i]->result_parameter.netagent_id); |
| 9394 | } |
| 9395 | } |
| 9396 | continue; |
| 9397 | } else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_REMOVE_NETAGENT) { |
| 9398 | bool agent_already_present = false; |
| 9399 | for (size_t netagent_i = 0; netagent_i < netagent_cursor; netagent_i++) { |
| 9400 | if (netagent_ids[netagent_i] == policy_search_array[i]->result_parameter.netagent_id) { |
| 9401 | // Already present. Mark the "REMOVE" flag if flags are supported, or just clear the entry |
| 9402 | agent_already_present = true; |
| 9403 | netagent_use_flags[netagent_i] = NECP_AGENT_USE_FLAG_REMOVE; |
| 9404 | } |
| 9405 | } |
| 9406 | if (!agent_already_present && netagent_cursor < netagent_array_count) { |
| 9407 | // If not present, and flags are supported, add an entry with the "REMOVE" flag |
| 9408 | netagent_ids[netagent_cursor] = policy_search_array[i]->result_parameter.netagent_id; |
| 9409 | netagent_use_flags[netagent_cursor] = NECP_AGENT_USE_FLAG_REMOVE; |
| 9410 | netagent_cursor++; |
| 9411 | } |
| 9412 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9413 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) Remove Netagent %d", |
| 9414 | info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, |
| 9415 | policy_search_array[i]->result_parameter.netagent_id); |
| 9416 | } |
| 9417 | continue; |
| 9418 | } else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT) { |
| 9419 | u_int32_t control_unit = policy_search_array[i]->result_parameter.flow_divert_control_unit; |
| 9420 | if (control_unit & FLOW_DIVERT_IS_TRANSPARENT) { |
| 9421 | /* For transparent proxies, accumulate the control unit and continue to the next policy */ |
| 9422 | if (return_flow_divert_aggregate_unit != NULL) { |
| 9423 | *return_flow_divert_aggregate_unit |= (control_unit & ~FLOW_DIVERT_IS_TRANSPARENT); |
| 9424 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9425 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy: (Application %d Real Application %d BoundInterface %d Proto %d) flow divert %u", info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, control_unit); |
| 9426 | } |
| 9427 | } |
| 9428 | continue; |
| 9429 | } |
| 9430 | } |
| 9431 | |
| 9432 | // Matched policy is a skip. Do skip and continue. |
| 9433 | if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 9434 | NECP_DATA_TRACE_LOG_POLICY(debug, "SOCKET", "MATCHED SKIP POLICY"); |
| 9435 | skip_order = policy_search_array[i]->result_parameter.skip_policy_order; |
| 9436 | skip_session_order = policy_search_array[i]->session_order + 1; |
| 9437 | if (skip_policy_id && *skip_policy_id == NECP_KERNEL_POLICY_ID_NONE) { |
| 9438 | *skip_policy_id = policy_search_array[i]->id; |
| 9439 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9440 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy: MATCHED SKIP POLICY (Application %d Real Application %d BoundInterface %d Proto %d) set skip_policy_id %d", info->application_id, info->real_application_id, info->bound_interface_index, info->protocol, *skip_policy_id); |
| 9441 | } |
| 9442 | } |
| 9443 | continue; |
| 9444 | } |
| 9445 | |
| 9446 | // Matched an allow unentitled, which clears any drop order |
| 9447 | if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_ALLOW_UNENTITLED) { |
| 9448 | info->drop_order = 0; |
| 9449 | continue; |
| 9450 | } |
| 9451 | |
| 9452 | // Passed all tests, found a match |
| 9453 | matched_policy = policy_search_array[i]; |
| 9454 | NECP_DATA_TRACE_LOG_SOCKET_RESULT(debug, so, "SOCKET", "RESULT - MATCHED POLICY"); |
| 9455 | break; |
| 9456 | } |
| 9457 | } |
| 9458 | } |
| 9459 | |
| 9460 | if (return_netagent_array != NULL) { |
| 9461 | if (return_netagent_use_flags_array != NULL) { |
| 9462 | memcpy(dst: return_netagent_array, src: &netagent_ids, n: sizeof(u_int32_t) * netagent_array_count); |
| 9463 | memcpy(dst: return_netagent_use_flags_array, src: &netagent_use_flags, n: sizeof(u_int32_t) * netagent_array_count); |
| 9464 | } else { |
| 9465 | for (size_t netagent_i = 0; netagent_i < netagent_array_count; netagent_i++) { |
| 9466 | if (!(netagent_use_flags[netagent_i] & NECP_AGENT_USE_FLAG_REMOVE)) { |
| 9467 | return_netagent_array[netagent_i] = netagent_ids[netagent_i]; |
| 9468 | } else { |
| 9469 | return_netagent_array[netagent_i] = 0; |
| 9470 | } |
| 9471 | } |
| 9472 | } |
| 9473 | } |
| 9474 | |
| 9475 | if (return_route_rule_id_array_count != NULL) { |
| 9476 | *return_route_rule_id_array_count = route_rule_id_count; |
| 9477 | } |
| 9478 | return matched_policy; |
| 9479 | } |
| 9480 | |
| 9481 | static bool |
| 9482 | necp_socket_uses_interface(struct inpcb *inp, u_int32_t interface_index) |
| 9483 | { |
| 9484 | bool found_match = FALSE; |
| 9485 | ifaddr_t ifa; |
| 9486 | union necp_sockaddr_union address_storage; |
| 9487 | int family = AF_INET; |
| 9488 | |
| 9489 | ifnet_head_lock_shared(); |
| 9490 | ifnet_t interface = ifindex2ifnet[interface_index]; |
| 9491 | ifnet_head_done(); |
| 9492 | |
| 9493 | if (inp == NULL || interface == NULL) { |
| 9494 | return FALSE; |
| 9495 | } |
| 9496 | |
| 9497 | if (inp->inp_vflag & INP_IPV4) { |
| 9498 | family = AF_INET; |
| 9499 | } else if (inp->inp_vflag & INP_IPV6) { |
| 9500 | family = AF_INET6; |
| 9501 | } else { |
| 9502 | return FALSE; |
| 9503 | } |
| 9504 | |
| 9505 | // Match socket address against interface addresses |
| 9506 | ifnet_lock_shared(ifp: interface); |
| 9507 | TAILQ_FOREACH(ifa, &interface->if_addrhead, ifa_link) { |
| 9508 | if (ifaddr_address(ifaddr: ifa, SA(&address_storage.sa), addr_size: sizeof(address_storage)) == 0) { |
| 9509 | if (address_storage.sa.sa_family != family) { |
| 9510 | continue; |
| 9511 | } |
| 9512 | |
| 9513 | if (family == AF_INET) { |
| 9514 | if (memcmp(s1: &address_storage.sin.sin_addr, s2: &inp->inp_laddr, n: sizeof(inp->inp_laddr)) == 0) { |
| 9515 | found_match = TRUE; |
| 9516 | break; |
| 9517 | } |
| 9518 | } else if (family == AF_INET6) { |
| 9519 | if (memcmp(s1: &address_storage.sin6.sin6_addr, s2: &inp->in6p_laddr, n: sizeof(inp->in6p_laddr)) == 0) { |
| 9520 | found_match = TRUE; |
| 9521 | break; |
| 9522 | } |
| 9523 | } |
| 9524 | } |
| 9525 | } |
| 9526 | ifnet_lock_done(ifp: interface); |
| 9527 | |
| 9528 | return found_match; |
| 9529 | } |
| 9530 | |
| 9531 | static inline bool |
| 9532 | necp_socket_is_connected(struct inpcb *inp) |
| 9533 | { |
| 9534 | return inp->inp_socket->so_state & (SS_ISCONNECTING | SS_ISCONNECTED | SS_ISDISCONNECTING); |
| 9535 | } |
| 9536 | |
| 9537 | static inline necp_socket_bypass_type_t |
| 9538 | necp_socket_bypass(struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, struct inpcb *inp) |
| 9539 | { |
| 9540 | if (necp_pass_loopback > 0 && necp_is_loopback(local_addr: override_local_addr, remote_addr: override_remote_addr, inp, NULL, IFSCOPE_NONE)) { |
| 9541 | return NECP_BYPASS_TYPE_LOOPBACK; |
| 9542 | } else if (necp_is_intcoproc(inp, NULL)) { |
| 9543 | return NECP_BYPASS_TYPE_INTCOPROC; |
| 9544 | } |
| 9545 | |
| 9546 | return NECP_BYPASS_TYPE_NONE; |
| 9547 | } |
| 9548 | |
| 9549 | static inline void |
| 9550 | necp_socket_ip_tunnel_tso(struct inpcb *inp) |
| 9551 | { |
| 9552 | u_int tunnel_interface_index = inp->inp_policyresult.results.result_parameter.tunnel_interface_index; |
| 9553 | ifnet_t tunnel_interface = NULL; |
| 9554 | |
| 9555 | ifnet_head_lock_shared(); |
| 9556 | tunnel_interface = ifindex2ifnet[tunnel_interface_index]; |
| 9557 | ifnet_head_done(); |
| 9558 | |
| 9559 | if (tunnel_interface != NULL) { |
| 9560 | tcp_set_tso(intotcpcb(inp), ifp: tunnel_interface); |
| 9561 | } |
| 9562 | } |
| 9563 | |
| 9564 | static inline void |
| 9565 | necp_unscope(struct inpcb *inp) |
| 9566 | { |
| 9567 | // If the current policy result is "socket scoped" and the pcb was actually re-scoped as a result, then un-bind the pcb |
| 9568 | if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED && (inp->inp_flags2 & INP2_SCOPED_BY_NECP)) { |
| 9569 | inp->inp_flags &= ~INP_BOUND_IF; |
| 9570 | inp->inp_boundifp = NULL; |
| 9571 | } |
| 9572 | } |
| 9573 | |
| 9574 | static inline void |
| 9575 | necp_clear_tunnel(struct inpcb *inp) |
| 9576 | { |
| 9577 | if (inp->inp_boundifp != NULL && inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL) { |
| 9578 | inp->inp_flags &= ~INP_BOUND_IF; |
| 9579 | inp->inp_boundifp = NULL; |
| 9580 | } |
| 9581 | } |
| 9582 | |
| 9583 | static inline bool |
| 9584 | necp_socket_verify_netagents(u_int32_t *netagent_ids, int debug, struct socket *so) |
| 9585 | { |
| 9586 | // Verify netagents |
| 9587 | for (int netagent_cursor = 0; netagent_cursor < NECP_MAX_NETAGENTS; netagent_cursor++) { |
| 9588 | struct necp_uuid_id_mapping *mapping = NULL; |
| 9589 | u_int32_t netagent_id = netagent_ids[netagent_cursor]; |
| 9590 | if (netagent_id == 0) { |
| 9591 | continue; |
| 9592 | } |
| 9593 | mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: netagent_id); |
| 9594 | if (mapping != NULL) { |
| 9595 | u_int32_t agent_flags = 0; |
| 9596 | agent_flags = netagent_get_flags(uuid: mapping->uuid); |
| 9597 | if (agent_flags & NETAGENT_FLAG_REGISTERED) { |
| 9598 | if (agent_flags & NETAGENT_FLAG_ACTIVE) { |
| 9599 | continue; |
| 9600 | } else if ((agent_flags & NETAGENT_FLAG_VOLUNTARY) == 0) { |
| 9601 | if (agent_flags & NETAGENT_FLAG_KERNEL_ACTIVATED) { |
| 9602 | int trigger_error = 0; |
| 9603 | trigger_error = netagent_kernel_trigger(uuid: mapping->uuid); |
| 9604 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9605 | NECPLOG(LOG_ERR, "DATA-TRACE: Socket Policy: <so %llx> Triggering inactive agent (%d), error %d", (unsigned long long)so, netagent_id, trigger_error); |
| 9606 | } |
| 9607 | } |
| 9608 | return false; |
| 9609 | } |
| 9610 | } |
| 9611 | } |
| 9612 | } |
| 9613 | return true; |
| 9614 | } |
| 9615 | |
| 9616 | necp_kernel_policy_id |
| 9617 | necp_socket_find_policy_match(struct inpcb *inp, struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, u_int32_t override_bound_interface) |
| 9618 | { |
| 9619 | struct socket *so = NULL; |
| 9620 | necp_kernel_policy_filter filter_control_unit = 0; |
| 9621 | struct necp_kernel_socket_policy *matched_policy = NULL; |
| 9622 | necp_kernel_policy_id matched_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 9623 | necp_kernel_policy_result service_action = 0; |
| 9624 | necp_kernel_policy_service service = { 0, 0 }; |
| 9625 | u_int32_t drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE; |
| 9626 | necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE; |
| 9627 | proc_t socket_proc = NULL; |
| 9628 | necp_socket_bypass_type_t bypass_type = NECP_BYPASS_TYPE_NONE; |
| 9629 | |
| 9630 | u_int32_t netagent_ids[NECP_MAX_NETAGENTS]; |
| 9631 | memset(s: &netagent_ids, c: 0, n: sizeof(netagent_ids)); |
| 9632 | |
| 9633 | struct necp_socket_info info = {}; |
| 9634 | |
| 9635 | u_int32_t flow_divert_aggregate_unit = 0; |
| 9636 | |
| 9637 | if (inp == NULL) { |
| 9638 | return NECP_KERNEL_POLICY_ID_NONE; |
| 9639 | } |
| 9640 | |
| 9641 | // Ignore invalid addresses |
| 9642 | if (override_local_addr != NULL && |
| 9643 | !necp_address_is_valid(override_local_addr)) { |
| 9644 | override_local_addr = NULL; |
| 9645 | } |
| 9646 | if (override_remote_addr != NULL && |
| 9647 | !necp_address_is_valid(override_remote_addr)) { |
| 9648 | override_remote_addr = NULL; |
| 9649 | } |
| 9650 | |
| 9651 | so = inp->inp_socket; |
| 9652 | |
| 9653 | u_int32_t drop_order = necp_process_drop_order(so->so_cred); |
| 9654 | |
| 9655 | // Don't lock. Possible race condition, but we don't want the performance hit. |
| 9656 | if (necp_drop_management_order == 0 && |
| 9657 | (necp_kernel_socket_policies_count == 0 || |
| 9658 | (!(inp->inp_flags2 & INP2_WANT_APP_POLICY) && necp_kernel_socket_policies_non_app_count == 0))) { |
| 9659 | if (necp_drop_all_order > 0 || drop_order > 0) { |
| 9660 | inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9661 | inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9662 | inp->inp_policyresult.policy_gencount = 0; |
| 9663 | inp->inp_policyresult.app_id = 0; |
| 9664 | inp->inp_policyresult.flowhash = 0; |
| 9665 | inp->inp_policyresult.results.filter_control_unit = 0; |
| 9666 | inp->inp_policyresult.results.flow_divert_aggregate_unit = 0; |
| 9667 | inp->inp_policyresult.results.route_rule_id = 0; |
| 9668 | if (necp_socket_bypass(override_local_addr, override_remote_addr, inp) != NECP_BYPASS_TYPE_NONE) { |
| 9669 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_PASS; |
| 9670 | } else { |
| 9671 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 9672 | } |
| 9673 | } |
| 9674 | return NECP_KERNEL_POLICY_ID_NONE; |
| 9675 | } |
| 9676 | |
| 9677 | // Check for loopback exception |
| 9678 | bypass_type = necp_socket_bypass(override_local_addr, override_remote_addr, inp); |
| 9679 | if (bypass_type == NECP_BYPASS_TYPE_INTCOPROC || (bypass_type == NECP_BYPASS_TYPE_LOOPBACK && necp_pass_loopback == NECP_LOOPBACK_PASS_ALL)) { |
| 9680 | // Mark socket as a pass |
| 9681 | necp_unscope(inp); |
| 9682 | inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9683 | inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9684 | inp->inp_policyresult.policy_gencount = 0; |
| 9685 | inp->inp_policyresult.app_id = 0; |
| 9686 | inp->inp_policyresult.flowhash = 0; |
| 9687 | inp->inp_policyresult.results.filter_control_unit = 0; |
| 9688 | inp->inp_policyresult.results.flow_divert_aggregate_unit = 0; |
| 9689 | inp->inp_policyresult.results.route_rule_id = 0; |
| 9690 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_PASS; |
| 9691 | return NECP_KERNEL_POLICY_ID_NONE; |
| 9692 | } |
| 9693 | |
| 9694 | // Lock |
| 9695 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 9696 | necp_socket_fillout_info_locked(inp, override_local_addr, override_remote_addr, override_bound_interface, false, drop_order, socket_proc: &socket_proc, info: &info, is_loopback: (bypass_type == NECP_BYPASS_TYPE_LOOPBACK)); |
| 9697 | |
| 9698 | int debug = NECP_ENABLE_DATA_TRACE((&info.local_addr), (&info.remote_addr), info.protocol, info.pid, info.bound_interface_index); |
| 9699 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - INP UPDATE", "START", 0, 0); |
| 9700 | |
| 9701 | // Check info |
| 9702 | u_int32_t flowhash = necp_socket_calc_flowhash_locked(info: &info); |
| 9703 | if (inp->inp_policyresult.policy_id != NECP_KERNEL_POLICY_ID_NONE && |
| 9704 | inp->inp_policyresult.policy_gencount == necp_kernel_socket_policies_gencount && |
| 9705 | inp->inp_policyresult.flowhash == flowhash) { |
| 9706 | // If already matched this socket on this generation of table, skip |
| 9707 | |
| 9708 | // Unlock |
| 9709 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 9710 | |
| 9711 | if (socket_proc) { |
| 9712 | proc_rele(p: socket_proc); |
| 9713 | } |
| 9714 | |
| 9715 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9716 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy - INP UPDATE - RESULT - CACHED <MATCHED>: %p (BoundInterface %d Proto %d) Policy %d Result %d Parameter %d", |
| 9717 | inp->inp_socket, info.bound_interface_index, info.protocol, |
| 9718 | inp->inp_policyresult.policy_id, |
| 9719 | inp->inp_policyresult.results.result, |
| 9720 | inp->inp_policyresult.results.result_parameter.tunnel_interface_index); |
| 9721 | } |
| 9722 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - INP UPDATE", "RESULT - CACHED <MATCHED>", inp->inp_policyresult.policy_id, 0); |
| 9723 | return inp->inp_policyresult.policy_id; |
| 9724 | } |
| 9725 | |
| 9726 | inp->inp_policyresult.app_id = info.application_id; |
| 9727 | |
| 9728 | // Match socket to policy |
| 9729 | necp_kernel_policy_id skip_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 9730 | u_int32_t route_rule_id_array[MAX_AGGREGATE_ROUTE_RULES] = {}; |
| 9731 | size_t route_rule_id_array_count = 0; |
| 9732 | |
| 9733 | matched_policy = necp_socket_find_policy_match_with_info_locked(policy_search_array: necp_kernel_socket_policies_map[NECP_SOCKET_MAP_APP_ID_TO_BUCKET(info.application_id)], info: &info, return_filter: &filter_control_unit, return_route_rule_id_array: route_rule_id_array, return_route_rule_id_array_count: &route_rule_id_array_count, MAX_AGGREGATE_ROUTE_RULES, return_service_action: &service_action, return_service: &service, return_netagent_array: netagent_ids, NULL, NECP_MAX_NETAGENTS, NULL, num_required_agent_types: 0, proc: socket_proc ? socket_proc : current_proc(), pf_tag: 0, skip_policy_id: &skip_policy_id, rt: inp->inp_route.ro_rt, return_drop_dest_policy_result: &drop_dest_policy_result, return_drop_all_bypass: &drop_all_bypass, return_flow_divert_aggregate_unit: &flow_divert_aggregate_unit, so, debug); |
| 9734 | |
| 9735 | // Check for loopback exception again after the policy match |
| 9736 | if (bypass_type == NECP_BYPASS_TYPE_LOOPBACK && |
| 9737 | necp_pass_loopback == NECP_LOOPBACK_PASS_WITH_FILTER && |
| 9738 | (matched_policy == NULL || matched_policy->result != NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT)) { |
| 9739 | // Mark socket as a pass |
| 9740 | necp_unscope(inp); |
| 9741 | inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9742 | inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9743 | inp->inp_policyresult.policy_gencount = 0; |
| 9744 | inp->inp_policyresult.app_id = 0; |
| 9745 | inp->inp_policyresult.flowhash = 0; |
| 9746 | inp->inp_policyresult.results.filter_control_unit = filter_control_unit; |
| 9747 | inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 9748 | inp->inp_policyresult.results.route_rule_id = 0; |
| 9749 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_PASS; |
| 9750 | |
| 9751 | // Unlock |
| 9752 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 9753 | |
| 9754 | if (socket_proc) { |
| 9755 | proc_rele(p: socket_proc); |
| 9756 | } |
| 9757 | |
| 9758 | return NECP_KERNEL_POLICY_ID_NONE; |
| 9759 | } |
| 9760 | |
| 9761 | // Verify netagents |
| 9762 | if (necp_socket_verify_netagents(netagent_ids, debug, so) == false) { |
| 9763 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9764 | NECPLOG(LOG_ERR, "DATA-TRACE: Socket Policy: <so %llx> (BoundInterface %d Proto %d) Dropping packet because agent is not active", (unsigned long long)so, info.bound_interface_index, info.protocol); |
| 9765 | } |
| 9766 | |
| 9767 | // Mark socket as a drop if required agent is not active |
| 9768 | inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9769 | inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9770 | inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount; |
| 9771 | inp->inp_policyresult.flowhash = flowhash; |
| 9772 | inp->inp_policyresult.results.filter_control_unit = 0; |
| 9773 | inp->inp_policyresult.results.flow_divert_aggregate_unit = 0; |
| 9774 | inp->inp_policyresult.results.route_rule_id = 0; |
| 9775 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 9776 | |
| 9777 | // Unlock |
| 9778 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 9779 | |
| 9780 | if (socket_proc) { |
| 9781 | proc_rele(p: socket_proc); |
| 9782 | } |
| 9783 | |
| 9784 | return NECP_KERNEL_POLICY_ID_NONE; |
| 9785 | } |
| 9786 | |
| 9787 | u_int32_t route_rule_id = 0; |
| 9788 | if (route_rule_id_array_count == 1) { |
| 9789 | route_rule_id = route_rule_id_array[0]; |
| 9790 | } else if (route_rule_id_array_count > 1) { |
| 9791 | route_rule_id = necp_create_aggregate_route_rule(rule_ids: route_rule_id_array); |
| 9792 | } |
| 9793 | |
| 9794 | bool reset_tcp_tunnel_interface = false; |
| 9795 | bool send_local_network_denied_event = false; |
| 9796 | if (matched_policy) { |
| 9797 | // For PASS policy result, clear previous rescope / tunnel inteface |
| 9798 | if (matched_policy->result == NECP_KERNEL_POLICY_RESULT_PASS && |
| 9799 | (info.client_flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER || info.is_local)) { |
| 9800 | necp_unscope(inp); |
| 9801 | necp_clear_tunnel(inp); |
| 9802 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9803 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - INP UPDATE", "socket unscoped for PASS result", inp->inp_policyresult.policy_id, 0); |
| 9804 | } |
| 9805 | } |
| 9806 | matched_policy_id = matched_policy->id; |
| 9807 | inp->inp_policyresult.policy_id = matched_policy->id; |
| 9808 | inp->inp_policyresult.skip_policy_id = skip_policy_id; |
| 9809 | inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount; |
| 9810 | inp->inp_policyresult.flowhash = flowhash; |
| 9811 | inp->inp_policyresult.results.filter_control_unit = filter_control_unit; |
| 9812 | inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 9813 | inp->inp_policyresult.results.route_rule_id = route_rule_id; |
| 9814 | inp->inp_policyresult.results.result = matched_policy->result; |
| 9815 | memcpy(dst: &inp->inp_policyresult.results.result_parameter, src: &matched_policy->result_parameter, n: sizeof(matched_policy->result_parameter)); |
| 9816 | |
| 9817 | if (info.used_responsible_pid && (matched_policy->condition_mask & NECP_KERNEL_CONDITION_REAL_APP_ID)) { |
| 9818 | inp->inp_policyresult.app_id = info.real_application_id; |
| 9819 | } |
| 9820 | |
| 9821 | if (necp_socket_is_connected(inp) && |
| 9822 | (matched_policy->result == NECP_KERNEL_POLICY_RESULT_DROP || |
| 9823 | (matched_policy->result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && !necp_socket_uses_interface(inp, interface_index: matched_policy->result_parameter.tunnel_interface_index)))) { |
| 9824 | NECPLOG(LOG_ERR, "Marking socket in state %d as defunct", so->so_state); |
| 9825 | sosetdefunct(current_proc(), so, SHUTDOWN_SOCKET_LEVEL_NECP | SHUTDOWN_SOCKET_LEVEL_DISCONNECT_ALL, TRUE); |
| 9826 | } else if (necp_socket_is_connected(inp) && |
| 9827 | matched_policy->result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && |
| 9828 | info.protocol == IPPROTO_TCP) { |
| 9829 | // Reset TCP socket interface based parameters if tunnel policy changes |
| 9830 | reset_tcp_tunnel_interface = true; |
| 9831 | } |
| 9832 | |
| 9833 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9834 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy: %p (BoundInterface %d Proto %d) Policy %d Skip %d Result %d Parameter %d", inp->inp_socket, info.bound_interface_index, info.protocol, matched_policy->id, skip_policy_id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index); |
| 9835 | } |
| 9836 | |
| 9837 | if (matched_policy->result == NECP_KERNEL_POLICY_RESULT_DROP && |
| 9838 | matched_policy->result_parameter.drop_flags & NECP_KERNEL_POLICY_DROP_FLAG_LOCAL_NETWORK && |
| 9839 | !(matched_policy->result_parameter.drop_flags & NECP_KERNEL_POLICY_DROP_FLAG_SUPPRESS_ALERTS)) { |
| 9840 | // Trigger the event that we dropped due to a local network policy |
| 9841 | send_local_network_denied_event = true; |
| 9842 | } |
| 9843 | } else { |
| 9844 | bool drop_all = false; |
| 9845 | if (necp_drop_all_order > 0 || info.drop_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP) { |
| 9846 | // Mark socket as a drop if set |
| 9847 | drop_all = true; |
| 9848 | if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) { |
| 9849 | drop_all_bypass = necp_check_drop_all_bypass_result(proc: socket_proc ? socket_proc : current_proc()); |
| 9850 | } |
| 9851 | } |
| 9852 | |
| 9853 | // Check if there is a route rule that adds flow divert, if we don't already have a terminal policy result |
| 9854 | u_int32_t flow_divert_control_unit = necp_route_get_flow_divert(NULL, netagent_array: netagent_ids, NECP_MAX_NETAGENTS, route_rule_id, flow_divert_aggregate_unit: &flow_divert_aggregate_unit); |
| 9855 | if (flow_divert_control_unit != 0) { |
| 9856 | inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9857 | inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9858 | inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount; |
| 9859 | inp->inp_policyresult.flowhash = flowhash; |
| 9860 | inp->inp_policyresult.results.filter_control_unit = filter_control_unit; |
| 9861 | inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 9862 | inp->inp_policyresult.results.route_rule_id = route_rule_id; |
| 9863 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT; |
| 9864 | inp->inp_policyresult.results.result_parameter.flow_divert_control_unit = flow_divert_control_unit; |
| 9865 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - INP UPDATE", "FLOW DIVERT <ROUTE RULE>", 0, 0); |
| 9866 | } else if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) { |
| 9867 | inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9868 | inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9869 | inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount; |
| 9870 | inp->inp_policyresult.flowhash = flowhash; |
| 9871 | inp->inp_policyresult.results.filter_control_unit = 0; |
| 9872 | inp->inp_policyresult.results.flow_divert_aggregate_unit = 0; |
| 9873 | inp->inp_policyresult.results.route_rule_id = 0; |
| 9874 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 9875 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - INP UPDATE", "RESULT - DROP <NO MATCH>", 0, 0); |
| 9876 | } else { |
| 9877 | // Mark non-matching socket so we don't re-check it |
| 9878 | necp_unscope(inp); |
| 9879 | if (info.client_flags & NECP_CLIENT_PARAMETER_FLAG_LISTENER || info.is_local) { |
| 9880 | necp_clear_tunnel(inp); |
| 9881 | } |
| 9882 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 9883 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - INP UPDATE", "socket unscoped for <NO MATCH>", inp->inp_policyresult.policy_id, 0); |
| 9884 | } |
| 9885 | inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9886 | inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9887 | inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount; |
| 9888 | inp->inp_policyresult.flowhash = flowhash; |
| 9889 | inp->inp_policyresult.results.filter_control_unit = filter_control_unit; // We may have matched a filter, so mark it! |
| 9890 | inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 9891 | inp->inp_policyresult.results.route_rule_id = route_rule_id; // We may have matched a route rule, so mark it! |
| 9892 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_NONE; |
| 9893 | } |
| 9894 | } |
| 9895 | |
| 9896 | if (necp_check_missing_client_drop(proc: socket_proc ? socket_proc : current_proc(), info: &info) || |
| 9897 | necp_check_restricted_multicast_drop(proc: socket_proc ? socket_proc : current_proc(), info: &info, false)) { |
| 9898 | // Mark as drop |
| 9899 | inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9900 | inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 9901 | inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount; |
| 9902 | inp->inp_policyresult.flowhash = flowhash; |
| 9903 | inp->inp_policyresult.results.filter_control_unit = 0; |
| 9904 | inp->inp_policyresult.results.flow_divert_aggregate_unit = 0; |
| 9905 | inp->inp_policyresult.results.route_rule_id = 0; |
| 9906 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 9907 | } |
| 9908 | |
| 9909 | // Unlock |
| 9910 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 9911 | |
| 9912 | if (reset_tcp_tunnel_interface) { |
| 9913 | // Update MSS when not holding the policy lock to avoid recursive locking |
| 9914 | tcp_mtudisc(inp, 0); |
| 9915 | |
| 9916 | // Update TSO flag based on the tunnel interface |
| 9917 | necp_socket_ip_tunnel_tso(inp); |
| 9918 | } |
| 9919 | |
| 9920 | if (send_local_network_denied_event && inp->inp_policyresult.network_denied_notifies == 0) { |
| 9921 | inp->inp_policyresult.network_denied_notifies++; |
| 9922 | necp_send_network_denied_event(pid: ((so->so_flags & SOF_DELEGATED) ? so->e_pid : so->last_pid), |
| 9923 | proc_uuid: ((so->so_flags & SOF_DELEGATED) ? so->e_uuid : so->last_uuid), |
| 9924 | NETPOLICY_NETWORKTYPE_LOCAL); |
| 9925 | } |
| 9926 | |
| 9927 | if (socket_proc) { |
| 9928 | proc_rele(p: socket_proc); |
| 9929 | } |
| 9930 | |
| 9931 | return matched_policy_id; |
| 9932 | } |
| 9933 | |
| 9934 | static bool |
| 9935 | necp_ip_output_check_policy(struct necp_kernel_ip_output_policy *kernel_policy, necp_kernel_policy_id socket_policy_id, necp_kernel_policy_id socket_skip_policy_id, u_int32_t bound_interface_index, u_int32_t last_interface_index, u_int16_t protocol, union necp_sockaddr_union *local, union necp_sockaddr_union *remote, struct rtentry *rt, u_int16_t pf_tag, int debug) |
| 9936 | { |
| 9937 | u_int32_t bound_interface_flags = 0; |
| 9938 | u_int32_t bound_interface_eflags = 0; |
| 9939 | u_int32_t bound_interface_xflags = 0; |
| 9940 | |
| 9941 | if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_ALL_INTERFACES)) { |
| 9942 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) { |
| 9943 | u_int32_t cond_bound_interface_index = kernel_policy->cond_bound_interface ? kernel_policy->cond_bound_interface->if_index : 0; |
| 9944 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE, |
| 9945 | "NECP_KERNEL_CONDITION_BOUND_INTERFACE", |
| 9946 | cond_bound_interface_index, bound_interface_index); |
| 9947 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) { |
| 9948 | if (bound_interface_index == cond_bound_interface_index) { |
| 9949 | // No match, matches forbidden interface |
| 9950 | return FALSE; |
| 9951 | } |
| 9952 | } else { |
| 9953 | if (bound_interface_index != cond_bound_interface_index) { |
| 9954 | // No match, does not match required interface |
| 9955 | return FALSE; |
| 9956 | } |
| 9957 | } |
| 9958 | } |
| 9959 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) { |
| 9960 | if (bound_interface_index != IFSCOPE_NONE) { |
| 9961 | ifnet_head_lock_shared(); |
| 9962 | ifnet_t interface = ifindex2ifnet[bound_interface_index]; |
| 9963 | if (interface != NULL) { |
| 9964 | bound_interface_flags = interface->if_flags; |
| 9965 | bound_interface_eflags = interface->if_eflags; |
| 9966 | bound_interface_xflags = interface->if_xflags; |
| 9967 | } |
| 9968 | ifnet_head_done(); |
| 9969 | } |
| 9970 | |
| 9971 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS, |
| 9972 | "NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS - flags", kernel_policy->cond_bound_interface_flags, bound_interface_flags); |
| 9973 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS, |
| 9974 | "NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS - eflags", kernel_policy->cond_bound_interface_eflags, bound_interface_eflags); |
| 9975 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS, |
| 9976 | "NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS - xflags", kernel_policy->cond_bound_interface_xflags, bound_interface_xflags); |
| 9977 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS) { |
| 9978 | if ((kernel_policy->cond_bound_interface_flags && (bound_interface_flags & kernel_policy->cond_bound_interface_flags)) || |
| 9979 | (kernel_policy->cond_bound_interface_eflags && (bound_interface_eflags & kernel_policy->cond_bound_interface_eflags)) || |
| 9980 | (kernel_policy->cond_bound_interface_xflags && (bound_interface_xflags & kernel_policy->cond_bound_interface_xflags))) { |
| 9981 | // No match, matches some forbidden interface flags |
| 9982 | return FALSE; |
| 9983 | } |
| 9984 | } else { |
| 9985 | if ((kernel_policy->cond_bound_interface_flags && !(bound_interface_flags & kernel_policy->cond_bound_interface_flags)) || |
| 9986 | (kernel_policy->cond_bound_interface_eflags && !(bound_interface_eflags & kernel_policy->cond_bound_interface_eflags)) || |
| 9987 | (kernel_policy->cond_bound_interface_xflags && !(bound_interface_xflags & kernel_policy->cond_bound_interface_xflags))) { |
| 9988 | // No match, does not match some required interface xflags |
| 9989 | return FALSE; |
| 9990 | } |
| 9991 | } |
| 9992 | } |
| 9993 | if (!(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE) && |
| 9994 | !(kernel_policy->condition_mask & NECP_KERNEL_CONDITION_BOUND_INTERFACE_FLAGS)) { |
| 9995 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", false, "Requiring no bound interface", 0, bound_interface_index); |
| 9996 | if (bound_interface_index != 0) { |
| 9997 | // No match, requires a non-bound packet |
| 9998 | return FALSE; |
| 9999 | } |
| 10000 | } |
| 10001 | } |
| 10002 | |
| 10003 | if (kernel_policy->condition_mask == 0) { |
| 10004 | return TRUE; |
| 10005 | } |
| 10006 | |
| 10007 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_POLICY_ID) { |
| 10008 | necp_kernel_policy_id matched_policy_id = |
| 10009 | kernel_policy->result == NECP_KERNEL_POLICY_RESULT_SKIP ? socket_skip_policy_id : socket_policy_id; |
| 10010 | NECP_DATA_TRACE_LOG_CONDITION3(debug, "IP", false, |
| 10011 | "NECP_KERNEL_CONDITION_POLICY_ID", |
| 10012 | kernel_policy->cond_policy_id, 0, 0, |
| 10013 | matched_policy_id, socket_policy_id, socket_skip_policy_id); |
| 10014 | if (matched_policy_id != kernel_policy->cond_policy_id) { |
| 10015 | // No match, does not match required id |
| 10016 | return FALSE; |
| 10017 | } |
| 10018 | } |
| 10019 | |
| 10020 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LAST_INTERFACE) { |
| 10021 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", false, |
| 10022 | "NECP_KERNEL_CONDITION_LAST_INTERFACE", |
| 10023 | kernel_policy->cond_last_interface_index, last_interface_index); |
| 10024 | if (last_interface_index != kernel_policy->cond_last_interface_index) { |
| 10025 | return FALSE; |
| 10026 | } |
| 10027 | } |
| 10028 | |
| 10029 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PROTOCOL) { |
| 10030 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PROTOCOL, |
| 10031 | "NECP_KERNEL_CONDITION_PROTOCOL", |
| 10032 | kernel_policy->cond_protocol, protocol); |
| 10033 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PROTOCOL) { |
| 10034 | if (protocol == kernel_policy->cond_protocol) { |
| 10035 | // No match, matches forbidden protocol |
| 10036 | return FALSE; |
| 10037 | } |
| 10038 | } else { |
| 10039 | if (protocol != kernel_policy->cond_protocol) { |
| 10040 | // No match, does not match required protocol |
| 10041 | return FALSE; |
| 10042 | } |
| 10043 | } |
| 10044 | } |
| 10045 | |
| 10046 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_NETWORKS) { |
| 10047 | bool is_local = FALSE; |
| 10048 | |
| 10049 | if (rt != NULL) { |
| 10050 | is_local = IS_NECP_DEST_IN_LOCAL_NETWORKS(rt); |
| 10051 | } else { |
| 10052 | is_local = necp_is_route_local(remote_addr: remote); |
| 10053 | } |
| 10054 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", false, "NECP_KERNEL_CONDITION_LOCAL_NETWORKS", 0, is_local); |
| 10055 | if (!is_local) { |
| 10056 | // Either no route to validate or no match for local networks |
| 10057 | return FALSE; |
| 10058 | } |
| 10059 | } |
| 10060 | |
| 10061 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_START) { |
| 10062 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 10063 | bool inRange = necp_is_addr_in_range(addr: (struct sockaddr *)local, range_start: (struct sockaddr *)&kernel_policy->cond_local_start, range_end: (struct sockaddr *)&kernel_policy->cond_local_end); |
| 10064 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_END, "local address range", 0, 0); |
| 10065 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_END) { |
| 10066 | if (inRange) { |
| 10067 | return FALSE; |
| 10068 | } |
| 10069 | } else { |
| 10070 | if (!inRange) { |
| 10071 | return FALSE; |
| 10072 | } |
| 10073 | } |
| 10074 | } else if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) { |
| 10075 | bool inSubnet = necp_is_addr_in_subnet(addr: (struct sockaddr *)local, subnet_addr: (struct sockaddr *)&kernel_policy->cond_local_start, subnet_prefix: kernel_policy->cond_local_prefix); |
| 10076 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX, "local address with prefix", 0, 0); |
| 10077 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_LOCAL_PREFIX) { |
| 10078 | if (inSubnet) { |
| 10079 | return FALSE; |
| 10080 | } |
| 10081 | } else { |
| 10082 | if (!inSubnet) { |
| 10083 | return FALSE; |
| 10084 | } |
| 10085 | } |
| 10086 | } |
| 10087 | } |
| 10088 | |
| 10089 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_START) { |
| 10090 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 10091 | bool inRange = necp_is_addr_in_range(addr: (struct sockaddr *)remote, range_start: (struct sockaddr *)&kernel_policy->cond_remote_start, range_end: (struct sockaddr *)&kernel_policy->cond_remote_end); |
| 10092 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_END, "remote address range", 0, 0); |
| 10093 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_END) { |
| 10094 | if (inRange) { |
| 10095 | return FALSE; |
| 10096 | } |
| 10097 | } else { |
| 10098 | if (!inRange) { |
| 10099 | return FALSE; |
| 10100 | } |
| 10101 | } |
| 10102 | } else if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) { |
| 10103 | bool inSubnet = necp_is_addr_in_subnet(addr: (struct sockaddr *)remote, subnet_addr: (struct sockaddr *)&kernel_policy->cond_remote_start, subnet_prefix: kernel_policy->cond_remote_prefix); |
| 10104 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX, "remote address with prefix", 0, 0); |
| 10105 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_REMOTE_PREFIX) { |
| 10106 | if (inSubnet) { |
| 10107 | return FALSE; |
| 10108 | } |
| 10109 | } else { |
| 10110 | if (!inSubnet) { |
| 10111 | return FALSE; |
| 10112 | } |
| 10113 | } |
| 10114 | } |
| 10115 | } |
| 10116 | |
| 10117 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_SCHEME_PORT) { |
| 10118 | u_int16_t remote_port = 0; |
| 10119 | if (((struct sockaddr *)remote)->sa_family == AF_INET || ((struct sockaddr *)remote)->sa_family == AF_INET6) { |
| 10120 | remote_port = ((struct sockaddr_in *)remote)->sin_port; |
| 10121 | } |
| 10122 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_SCHEME_PORT, |
| 10123 | "NECP_KERNEL_CONDITION_SCHEME_PORT", |
| 10124 | 0, remote_port); |
| 10125 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_SCHEME_PORT) { |
| 10126 | if (kernel_policy->cond_scheme_port == remote_port) { |
| 10127 | return FALSE; |
| 10128 | } |
| 10129 | } else { |
| 10130 | if (kernel_policy->cond_scheme_port != remote_port) { |
| 10131 | return FALSE; |
| 10132 | } |
| 10133 | } |
| 10134 | } |
| 10135 | |
| 10136 | if (kernel_policy->condition_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) { |
| 10137 | bool tags_matched = false; |
| 10138 | NECP_DATA_TRACE_LOG_CONDITION(debug, "IP", kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS, |
| 10139 | "NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS", |
| 10140 | kernel_policy->cond_packet_filter_tags, pf_tag); |
| 10141 | if (kernel_policy->cond_packet_filter_tags & NECP_POLICY_CONDITION_PACKET_FILTER_TAG_STACK_DROP) { |
| 10142 | if ((pf_tag & PF_TAG_ID_STACK_DROP) == PF_TAG_ID_STACK_DROP) { |
| 10143 | tags_matched = true; |
| 10144 | } |
| 10145 | |
| 10146 | if (kernel_policy->condition_negated_mask & NECP_KERNEL_CONDITION_PACKET_FILTER_TAGS) { |
| 10147 | if (tags_matched) { |
| 10148 | return FALSE; |
| 10149 | } |
| 10150 | } else { |
| 10151 | if (!tags_matched) { |
| 10152 | return FALSE; |
| 10153 | } |
| 10154 | } |
| 10155 | } |
| 10156 | } |
| 10157 | |
| 10158 | return TRUE; |
| 10159 | } |
| 10160 | |
| 10161 | static inline struct necp_kernel_ip_output_policy * |
| 10162 | necp_ip_output_find_policy_match_locked(necp_kernel_policy_id socket_policy_id, necp_kernel_policy_id socket_skip_policy_id, u_int32_t bound_interface_index, u_int32_t last_interface_index, u_int16_t protocol, union necp_sockaddr_union *local_addr, union necp_sockaddr_union *remote_addr, struct rtentry *rt, u_int16_t pf_tag, u_int32_t *return_route_rule_id, necp_kernel_policy_result *return_drop_dest_policy_result, necp_drop_all_bypass_check_result_t *return_drop_all_bypass, int debug) |
| 10163 | { |
| 10164 | u_int32_t skip_order = 0; |
| 10165 | u_int32_t skip_session_order = 0; |
| 10166 | struct necp_kernel_ip_output_policy *matched_policy = NULL; |
| 10167 | struct necp_kernel_ip_output_policy **policy_search_array = necp_kernel_ip_output_policies_map[NECP_IP_OUTPUT_MAP_ID_TO_BUCKET(socket_policy_id)]; |
| 10168 | u_int32_t route_rule_id_array[MAX_AGGREGATE_ROUTE_RULES]; |
| 10169 | size_t route_rule_id_count = 0; |
| 10170 | necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE; |
| 10171 | if (return_drop_all_bypass != NULL) { |
| 10172 | *return_drop_all_bypass = drop_all_bypass; |
| 10173 | } |
| 10174 | |
| 10175 | if (return_route_rule_id != NULL) { |
| 10176 | *return_route_rule_id = 0; |
| 10177 | } |
| 10178 | |
| 10179 | *return_drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE; |
| 10180 | |
| 10181 | if (policy_search_array != NULL) { |
| 10182 | for (int i = 0; policy_search_array[i] != NULL; i++) { |
| 10183 | NECP_DATA_TRACE_LOG_POLICY(debug, "IP", "EXAMINING"); |
| 10184 | if (necp_drop_all_order != 0 && policy_search_array[i]->session_order >= necp_drop_all_order) { |
| 10185 | // We've hit a drop all rule |
| 10186 | if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) { |
| 10187 | drop_all_bypass = necp_check_drop_all_bypass_result(NULL); |
| 10188 | if (return_drop_all_bypass != NULL) { |
| 10189 | *return_drop_all_bypass = drop_all_bypass; |
| 10190 | } |
| 10191 | } |
| 10192 | if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) { |
| 10193 | NECP_DATA_TRACE_LOG_IP_RESULT(debug, "IP", "RESULT - DROP (session order > drop-all order)"); |
| 10194 | break; |
| 10195 | } |
| 10196 | } |
| 10197 | if (necp_drop_dest_policy.entry_count > 0 && |
| 10198 | necp_address_matches_drop_dest_policy(remote_addr, policy_search_array[i]->session_order)) { |
| 10199 | // We've hit a drop by destination address rule |
| 10200 | *return_drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 10201 | NECP_DATA_TRACE_LOG_IP_RESULT(debug, "IP", "RESULT - DROP (destination address rule)"); |
| 10202 | break; |
| 10203 | } |
| 10204 | if (skip_session_order && policy_search_array[i]->session_order >= skip_session_order) { |
| 10205 | // Done skipping |
| 10206 | skip_order = 0; |
| 10207 | skip_session_order = 0; |
| 10208 | } |
| 10209 | if (skip_order) { |
| 10210 | if (policy_search_array[i]->order < skip_order) { |
| 10211 | // Skip this policy |
| 10212 | NECP_DATA_TRACE_LOG_POLICY(debug, "IP", "SKIP (session order < skip-order)"); |
| 10213 | continue; |
| 10214 | } else { |
| 10215 | // Done skipping |
| 10216 | skip_order = 0; |
| 10217 | skip_session_order = 0; |
| 10218 | } |
| 10219 | } else if (skip_session_order) { |
| 10220 | // Skip this policy |
| 10221 | NECP_DATA_TRACE_LOG_POLICY(debug, "IP", "SKIP (skip-session-order)"); |
| 10222 | continue; |
| 10223 | } |
| 10224 | |
| 10225 | if (necp_ip_output_check_policy(kernel_policy: policy_search_array[i], socket_policy_id, socket_skip_policy_id, bound_interface_index, last_interface_index, protocol, local: local_addr, remote: remote_addr, rt, pf_tag, debug)) { |
| 10226 | if (!debug && necp_data_tracing_session_order) { |
| 10227 | if ((necp_data_tracing_session_order == policy_search_array[i]->session_order) && |
| 10228 | (!necp_data_tracing_policy_order || (necp_data_tracing_policy_order == policy_search_array[i]->order))) { |
| 10229 | NECP_DATA_TRACE_LOG_IP_RESULT(true, "IP", "DEBUG - MATCHED POLICY"); |
| 10230 | } |
| 10231 | } |
| 10232 | |
| 10233 | if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_ROUTE_RULES) { |
| 10234 | if (return_route_rule_id != NULL && route_rule_id_count < MAX_AGGREGATE_ROUTE_RULES) { |
| 10235 | route_rule_id_array[route_rule_id_count++] = policy_search_array[i]->result_parameter.route_rule_id; |
| 10236 | } |
| 10237 | continue; |
| 10238 | } else if (policy_search_array[i]->result == NECP_KERNEL_POLICY_RESULT_SKIP) { |
| 10239 | skip_order = policy_search_array[i]->result_parameter.skip_policy_order; |
| 10240 | skip_session_order = policy_search_array[i]->session_order + 1; |
| 10241 | NECP_DATA_TRACE_LOG_POLICY(debug, "IP", "MATCHED SKIP POLICY"); |
| 10242 | continue; |
| 10243 | } |
| 10244 | |
| 10245 | // Passed all tests, found a match |
| 10246 | matched_policy = policy_search_array[i]; |
| 10247 | NECP_DATA_TRACE_LOG_IP_RESULT(debug, "IP", "RESULT - MATCHED POLICY"); |
| 10248 | break; |
| 10249 | } |
| 10250 | } |
| 10251 | } |
| 10252 | |
| 10253 | if (route_rule_id_count == 1) { |
| 10254 | *return_route_rule_id = route_rule_id_array[0]; |
| 10255 | } else if (route_rule_id_count > 1) { |
| 10256 | *return_route_rule_id = necp_create_aggregate_route_rule(rule_ids: route_rule_id_array); |
| 10257 | } |
| 10258 | |
| 10259 | return matched_policy; |
| 10260 | } |
| 10261 | |
| 10262 | static inline bool |
| 10263 | necp_output_bypass(struct mbuf *packet) |
| 10264 | { |
| 10265 | if (necp_pass_loopback > 0 && necp_is_loopback(NULL, NULL, NULL, packet, IFSCOPE_NONE)) { |
| 10266 | return true; |
| 10267 | } |
| 10268 | if (necp_pass_keepalives > 0 && necp_get_is_keepalive_from_packet(packet)) { |
| 10269 | return true; |
| 10270 | } |
| 10271 | if (necp_is_intcoproc(NULL, packet)) { |
| 10272 | return true; |
| 10273 | } |
| 10274 | return false; |
| 10275 | } |
| 10276 | |
| 10277 | necp_kernel_policy_id |
| 10278 | necp_ip_output_find_policy_match(struct mbuf *packet, int flags, struct ip_out_args *ipoa, struct rtentry *rt, |
| 10279 | necp_kernel_policy_result *result, necp_kernel_policy_result_parameter *result_parameter) |
| 10280 | { |
| 10281 | struct ip *ip = NULL; |
| 10282 | int hlen = sizeof(struct ip); |
| 10283 | necp_kernel_policy_id socket_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 10284 | necp_kernel_policy_id socket_skip_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 10285 | necp_kernel_policy_id matched_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 10286 | struct necp_kernel_ip_output_policy *matched_policy = NULL; |
| 10287 | u_int16_t protocol = 0; |
| 10288 | u_int32_t bound_interface_index = 0; |
| 10289 | u_int32_t last_interface_index = 0; |
| 10290 | union necp_sockaddr_union local_addr = { }; |
| 10291 | union necp_sockaddr_union remote_addr = { }; |
| 10292 | u_int32_t drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE; |
| 10293 | necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE; |
| 10294 | u_int16_t pf_tag = 0; |
| 10295 | |
| 10296 | if (result) { |
| 10297 | *result = 0; |
| 10298 | } |
| 10299 | |
| 10300 | if (result_parameter) { |
| 10301 | memset(s: result_parameter, c: 0, n: sizeof(*result_parameter)); |
| 10302 | } |
| 10303 | |
| 10304 | if (packet == NULL) { |
| 10305 | return NECP_KERNEL_POLICY_ID_NONE; |
| 10306 | } |
| 10307 | |
| 10308 | socket_policy_id = necp_get_policy_id_from_packet(packet); |
| 10309 | socket_skip_policy_id = necp_get_skip_policy_id_from_packet(packet); |
| 10310 | pf_tag = necp_get_packet_filter_tags_from_packet(packet); |
| 10311 | |
| 10312 | // Exit early for an empty list |
| 10313 | // Don't lock. Possible race condition, but we don't want the performance hit. |
| 10314 | if (necp_kernel_ip_output_policies_count == 0 || |
| 10315 | (socket_policy_id == NECP_KERNEL_POLICY_ID_NONE && necp_kernel_ip_output_policies_non_id_count == 0 && necp_drop_dest_policy.entry_count == 0)) { |
| 10316 | if (necp_drop_all_order > 0) { |
| 10317 | matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 10318 | if (result) { |
| 10319 | if (necp_output_bypass(packet)) { |
| 10320 | *result = NECP_KERNEL_POLICY_RESULT_PASS; |
| 10321 | } else { |
| 10322 | *result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 10323 | } |
| 10324 | } |
| 10325 | } |
| 10326 | |
| 10327 | return matched_policy_id; |
| 10328 | } |
| 10329 | |
| 10330 | // Check for loopback exception |
| 10331 | if (necp_output_bypass(packet)) { |
| 10332 | matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 10333 | if (result) { |
| 10334 | *result = NECP_KERNEL_POLICY_RESULT_PASS; |
| 10335 | } |
| 10336 | return matched_policy_id; |
| 10337 | } |
| 10338 | |
| 10339 | last_interface_index = necp_get_last_interface_index_from_packet(packet); |
| 10340 | |
| 10341 | // Process packet to get relevant fields |
| 10342 | ip = mtod(packet, struct ip *); |
| 10343 | #ifdef _IP_VHL |
| 10344 | hlen = _IP_VHL_HL(ip->ip_vhl) << 2; |
| 10345 | #else |
| 10346 | hlen = ip->ip_hl << 2; |
| 10347 | #endif |
| 10348 | |
| 10349 | protocol = ip->ip_p; |
| 10350 | |
| 10351 | if ((flags & IP_OUTARGS) && (ipoa != NULL) && |
| 10352 | (ipoa->ipoa_flags & IPOAF_BOUND_IF) && |
| 10353 | ipoa->ipoa_boundif != IFSCOPE_NONE) { |
| 10354 | bound_interface_index = ipoa->ipoa_boundif; |
| 10355 | } |
| 10356 | |
| 10357 | local_addr.sin.sin_family = AF_INET; |
| 10358 | local_addr.sin.sin_len = sizeof(struct sockaddr_in); |
| 10359 | memcpy(dst: &local_addr.sin.sin_addr, src: &ip->ip_src, n: sizeof(ip->ip_src)); |
| 10360 | |
| 10361 | remote_addr.sin.sin_family = AF_INET; |
| 10362 | remote_addr.sin.sin_len = sizeof(struct sockaddr_in); |
| 10363 | memcpy(dst: &((struct sockaddr_in *)&remote_addr)->sin_addr, src: &ip->ip_dst, n: sizeof(ip->ip_dst)); |
| 10364 | |
| 10365 | switch (protocol) { |
| 10366 | case IPPROTO_TCP: { |
| 10367 | struct tcphdr th; |
| 10368 | if ((int)(hlen + sizeof(th)) <= packet->m_pkthdr.len) { |
| 10369 | m_copydata(packet, hlen, sizeof(th), (u_int8_t *)&th); |
| 10370 | ((struct sockaddr_in *)&local_addr)->sin_port = th.th_sport; |
| 10371 | ((struct sockaddr_in *)&remote_addr)->sin_port = th.th_dport; |
| 10372 | } |
| 10373 | break; |
| 10374 | } |
| 10375 | case IPPROTO_UDP: { |
| 10376 | struct udphdr uh; |
| 10377 | if ((int)(hlen + sizeof(uh)) <= packet->m_pkthdr.len) { |
| 10378 | m_copydata(packet, hlen, sizeof(uh), (u_int8_t *)&uh); |
| 10379 | ((struct sockaddr_in *)&local_addr)->sin_port = uh.uh_sport; |
| 10380 | ((struct sockaddr_in *)&remote_addr)->sin_port = uh.uh_dport; |
| 10381 | } |
| 10382 | break; |
| 10383 | } |
| 10384 | default: { |
| 10385 | ((struct sockaddr_in *)&local_addr)->sin_port = 0; |
| 10386 | ((struct sockaddr_in *)&remote_addr)->sin_port = 0; |
| 10387 | break; |
| 10388 | } |
| 10389 | } |
| 10390 | |
| 10391 | // Match packet to policy |
| 10392 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 10393 | u_int32_t route_rule_id = 0; |
| 10394 | |
| 10395 | int debug = NECP_ENABLE_DATA_TRACE((&local_addr), (&remote_addr), protocol, 0, bound_interface_index); |
| 10396 | NECP_DATA_TRACE_LOG_IP4(debug, "IP4", "START"); |
| 10397 | |
| 10398 | matched_policy = necp_ip_output_find_policy_match_locked(socket_policy_id, socket_skip_policy_id, bound_interface_index, last_interface_index, protocol, local_addr: &local_addr, remote_addr: &remote_addr, rt, pf_tag, return_route_rule_id: &route_rule_id, return_drop_dest_policy_result: &drop_dest_policy_result, return_drop_all_bypass: &drop_all_bypass, debug); |
| 10399 | if (matched_policy) { |
| 10400 | matched_policy_id = matched_policy->id; |
| 10401 | if (result) { |
| 10402 | *result = matched_policy->result; |
| 10403 | } |
| 10404 | |
| 10405 | if (result_parameter) { |
| 10406 | memcpy(dst: result_parameter, src: &matched_policy->result_parameter, n: sizeof(matched_policy->result_parameter)); |
| 10407 | } |
| 10408 | |
| 10409 | if (route_rule_id != 0 && |
| 10410 | packet->m_pkthdr.necp_mtag.necp_route_rule_id == 0) { |
| 10411 | packet->m_pkthdr.necp_mtag.necp_route_rule_id = route_rule_id; |
| 10412 | } |
| 10413 | |
| 10414 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 10415 | NECPLOG(LOG_DEBUG, "DATA-TRACE: IP Output: RESULT - MATCHED (ID %d BoundInterface %d LastInterface %d Proto %d) Policy %d Result %d Parameter %d Route Rule %u", socket_policy_id, bound_interface_index, last_interface_index, protocol, matched_policy->id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index, route_rule_id); |
| 10416 | } |
| 10417 | } else { |
| 10418 | bool drop_all = false; |
| 10419 | /* |
| 10420 | * Apply drop-all only to packets which have never matched a primary policy (check |
| 10421 | * if the packet saved policy id is none or falls within the socket policy id range). |
| 10422 | */ |
| 10423 | if (socket_policy_id < NECP_KERNEL_POLICY_ID_FIRST_VALID_IP && |
| 10424 | (necp_drop_all_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP)) { |
| 10425 | drop_all = true; |
| 10426 | if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) { |
| 10427 | drop_all_bypass = necp_check_drop_all_bypass_result(NULL); |
| 10428 | } |
| 10429 | } |
| 10430 | if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) { |
| 10431 | matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 10432 | if (result) { |
| 10433 | *result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 10434 | NECP_DATA_TRACE_LOG_IP4(debug, "IP4", "RESULT - DROP <NO MATCH>"); |
| 10435 | } |
| 10436 | } else if (route_rule_id != 0 && |
| 10437 | packet->m_pkthdr.necp_mtag.necp_route_rule_id == 0) { |
| 10438 | // If we matched a route rule, mark it |
| 10439 | packet->m_pkthdr.necp_mtag.necp_route_rule_id = route_rule_id; |
| 10440 | } |
| 10441 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 10442 | NECPLOG(LOG_DEBUG, "DATA-TRACE: IP Output: RESULT - NO MATCH (ID %d BoundInterface %d LastInterface %d Proto %d)", socket_policy_id, bound_interface_index, last_interface_index, protocol); |
| 10443 | } |
| 10444 | } |
| 10445 | |
| 10446 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 10447 | |
| 10448 | return matched_policy_id; |
| 10449 | } |
| 10450 | |
| 10451 | necp_kernel_policy_id |
| 10452 | necp_ip6_output_find_policy_match(struct mbuf *packet, int flags, struct ip6_out_args *ip6oa, struct rtentry *rt, |
| 10453 | necp_kernel_policy_result *result, necp_kernel_policy_result_parameter *result_parameter) |
| 10454 | { |
| 10455 | struct ip6_hdr *ip6 = NULL; |
| 10456 | int next = -1; |
| 10457 | int offset = 0; |
| 10458 | necp_kernel_policy_id socket_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 10459 | necp_kernel_policy_id socket_skip_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 10460 | necp_kernel_policy_id matched_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 10461 | struct necp_kernel_ip_output_policy *matched_policy = NULL; |
| 10462 | u_int16_t protocol = 0; |
| 10463 | u_int32_t bound_interface_index = 0; |
| 10464 | u_int32_t last_interface_index = 0; |
| 10465 | union necp_sockaddr_union local_addr = { }; |
| 10466 | union necp_sockaddr_union remote_addr = { }; |
| 10467 | u_int32_t drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE; |
| 10468 | necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE; |
| 10469 | u_int16_t pf_tag = 0; |
| 10470 | |
| 10471 | if (result) { |
| 10472 | *result = 0; |
| 10473 | } |
| 10474 | |
| 10475 | if (result_parameter) { |
| 10476 | memset(s: result_parameter, c: 0, n: sizeof(*result_parameter)); |
| 10477 | } |
| 10478 | |
| 10479 | if (packet == NULL) { |
| 10480 | return NECP_KERNEL_POLICY_ID_NONE; |
| 10481 | } |
| 10482 | |
| 10483 | socket_policy_id = necp_get_policy_id_from_packet(packet); |
| 10484 | socket_skip_policy_id = necp_get_skip_policy_id_from_packet(packet); |
| 10485 | pf_tag = necp_get_packet_filter_tags_from_packet(packet); |
| 10486 | |
| 10487 | // Exit early for an empty list |
| 10488 | // Don't lock. Possible race condition, but we don't want the performance hit. |
| 10489 | if (necp_drop_management_order == 0 && |
| 10490 | (necp_kernel_ip_output_policies_count == 0 || |
| 10491 | (socket_policy_id == NECP_KERNEL_POLICY_ID_NONE && necp_kernel_ip_output_policies_non_id_count == 0 && necp_drop_dest_policy.entry_count == 0))) { |
| 10492 | if (necp_drop_all_order > 0) { |
| 10493 | matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 10494 | if (result) { |
| 10495 | if (necp_output_bypass(packet)) { |
| 10496 | *result = NECP_KERNEL_POLICY_RESULT_PASS; |
| 10497 | } else { |
| 10498 | *result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 10499 | } |
| 10500 | } |
| 10501 | } |
| 10502 | |
| 10503 | return matched_policy_id; |
| 10504 | } |
| 10505 | |
| 10506 | // Check for loopback exception |
| 10507 | if (necp_output_bypass(packet)) { |
| 10508 | matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 10509 | if (result) { |
| 10510 | *result = NECP_KERNEL_POLICY_RESULT_PASS; |
| 10511 | } |
| 10512 | return matched_policy_id; |
| 10513 | } |
| 10514 | |
| 10515 | last_interface_index = necp_get_last_interface_index_from_packet(packet); |
| 10516 | |
| 10517 | // Process packet to get relevant fields |
| 10518 | ip6 = mtod(packet, struct ip6_hdr *); |
| 10519 | |
| 10520 | if ((flags & IPV6_OUTARGS) && (ip6oa != NULL) && |
| 10521 | (ip6oa->ip6oa_flags & IP6OAF_BOUND_IF) && |
| 10522 | ip6oa->ip6oa_boundif != IFSCOPE_NONE) { |
| 10523 | bound_interface_index = ip6oa->ip6oa_boundif; |
| 10524 | } |
| 10525 | |
| 10526 | ((struct sockaddr_in6 *)&local_addr)->sin6_family = AF_INET6; |
| 10527 | ((struct sockaddr_in6 *)&local_addr)->sin6_len = sizeof(struct sockaddr_in6); |
| 10528 | memcpy(dst: &((struct sockaddr_in6 *)&local_addr)->sin6_addr, src: &ip6->ip6_src, n: sizeof(ip6->ip6_src)); |
| 10529 | |
| 10530 | ((struct sockaddr_in6 *)&remote_addr)->sin6_family = AF_INET6; |
| 10531 | ((struct sockaddr_in6 *)&remote_addr)->sin6_len = sizeof(struct sockaddr_in6); |
| 10532 | memcpy(dst: &((struct sockaddr_in6 *)&remote_addr)->sin6_addr, src: &ip6->ip6_dst, n: sizeof(ip6->ip6_dst)); |
| 10533 | |
| 10534 | offset = ip6_lasthdr(packet, 0, IPPROTO_IPV6, &next); |
| 10535 | if (offset >= 0 && packet->m_pkthdr.len >= offset) { |
| 10536 | protocol = next; |
| 10537 | switch (protocol) { |
| 10538 | case IPPROTO_TCP: { |
| 10539 | struct tcphdr th; |
| 10540 | if ((int)(offset + sizeof(th)) <= packet->m_pkthdr.len) { |
| 10541 | m_copydata(packet, offset, sizeof(th), (u_int8_t *)&th); |
| 10542 | ((struct sockaddr_in6 *)&local_addr)->sin6_port = th.th_sport; |
| 10543 | ((struct sockaddr_in6 *)&remote_addr)->sin6_port = th.th_dport; |
| 10544 | } |
| 10545 | break; |
| 10546 | } |
| 10547 | case IPPROTO_UDP: { |
| 10548 | struct udphdr uh; |
| 10549 | if ((int)(offset + sizeof(uh)) <= packet->m_pkthdr.len) { |
| 10550 | m_copydata(packet, offset, sizeof(uh), (u_int8_t *)&uh); |
| 10551 | ((struct sockaddr_in6 *)&local_addr)->sin6_port = uh.uh_sport; |
| 10552 | ((struct sockaddr_in6 *)&remote_addr)->sin6_port = uh.uh_dport; |
| 10553 | } |
| 10554 | break; |
| 10555 | } |
| 10556 | default: { |
| 10557 | ((struct sockaddr_in6 *)&local_addr)->sin6_port = 0; |
| 10558 | ((struct sockaddr_in6 *)&remote_addr)->sin6_port = 0; |
| 10559 | break; |
| 10560 | } |
| 10561 | } |
| 10562 | } |
| 10563 | |
| 10564 | // Match packet to policy |
| 10565 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 10566 | u_int32_t route_rule_id = 0; |
| 10567 | |
| 10568 | int debug = NECP_ENABLE_DATA_TRACE((&local_addr), (&remote_addr), protocol, 0, bound_interface_index); |
| 10569 | NECP_DATA_TRACE_LOG_IP6(debug, "IP6", "START"); |
| 10570 | |
| 10571 | matched_policy = necp_ip_output_find_policy_match_locked(socket_policy_id, socket_skip_policy_id, bound_interface_index, last_interface_index, protocol, local_addr: &local_addr, remote_addr: &remote_addr, rt, pf_tag, return_route_rule_id: &route_rule_id, return_drop_dest_policy_result: &drop_dest_policy_result, return_drop_all_bypass: &drop_all_bypass, debug); |
| 10572 | if (matched_policy) { |
| 10573 | matched_policy_id = matched_policy->id; |
| 10574 | if (result) { |
| 10575 | *result = matched_policy->result; |
| 10576 | } |
| 10577 | |
| 10578 | if (result_parameter) { |
| 10579 | memcpy(dst: result_parameter, src: &matched_policy->result_parameter, n: sizeof(matched_policy->result_parameter)); |
| 10580 | } |
| 10581 | |
| 10582 | if (route_rule_id != 0 && |
| 10583 | packet->m_pkthdr.necp_mtag.necp_route_rule_id == 0) { |
| 10584 | packet->m_pkthdr.necp_mtag.necp_route_rule_id = route_rule_id; |
| 10585 | } |
| 10586 | |
| 10587 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 10588 | NECPLOG(LOG_DEBUG, "DATA-TRACE: IP6 Output: RESULT - MATCHED (ID %d BoundInterface %d LastInterface %d Proto %d) Policy %d Result %d Parameter %d Route Rule %u", socket_policy_id, bound_interface_index, last_interface_index, protocol, matched_policy->id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index, route_rule_id); |
| 10589 | } |
| 10590 | } else { |
| 10591 | bool drop_all = false; |
| 10592 | /* |
| 10593 | * Apply drop-all only to packets which have never matched a primary policy (check |
| 10594 | * if the packet saved policy id is none or falls within the socket policy id range). |
| 10595 | */ |
| 10596 | if (socket_policy_id < NECP_KERNEL_POLICY_ID_FIRST_VALID_IP && |
| 10597 | (necp_drop_all_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP)) { |
| 10598 | drop_all = true; |
| 10599 | if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) { |
| 10600 | drop_all_bypass = necp_check_drop_all_bypass_result(NULL); |
| 10601 | } |
| 10602 | } |
| 10603 | if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) { |
| 10604 | matched_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 10605 | if (result) { |
| 10606 | *result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 10607 | NECP_DATA_TRACE_LOG_IP6(debug, "IP6", "RESULT - DROP <NO MATCH>"); |
| 10608 | } |
| 10609 | } else if (route_rule_id != 0 && |
| 10610 | packet->m_pkthdr.necp_mtag.necp_route_rule_id == 0) { |
| 10611 | // If we matched a route rule, mark it |
| 10612 | packet->m_pkthdr.necp_mtag.necp_route_rule_id = route_rule_id; |
| 10613 | } |
| 10614 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 10615 | NECPLOG(LOG_DEBUG, "DATA-TRACE: IP6 Output: RESULT - NO MATCH (ID %d BoundInterface %d LastInterface %d Proto %d)", socket_policy_id, bound_interface_index, last_interface_index, protocol); |
| 10616 | } |
| 10617 | } |
| 10618 | |
| 10619 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 10620 | |
| 10621 | return matched_policy_id; |
| 10622 | } |
| 10623 | |
| 10624 | // Utilities |
| 10625 | static bool |
| 10626 | necp_is_addr_in_range(struct sockaddr *addr, struct sockaddr *range_start, struct sockaddr *range_end) |
| 10627 | { |
| 10628 | int cmp = 0; |
| 10629 | |
| 10630 | if (addr == NULL || range_start == NULL || range_end == NULL) { |
| 10631 | return FALSE; |
| 10632 | } |
| 10633 | |
| 10634 | /* Must be greater than or equal to start */ |
| 10635 | cmp = necp_addr_compare(sa1: addr, sa2: range_start, check_port: 1); |
| 10636 | if (cmp != 0 && cmp != 1) { |
| 10637 | return FALSE; |
| 10638 | } |
| 10639 | |
| 10640 | /* Must be less than or equal to end */ |
| 10641 | cmp = necp_addr_compare(sa1: addr, sa2: range_end, check_port: 1); |
| 10642 | if (cmp != 0 && cmp != -1) { |
| 10643 | return FALSE; |
| 10644 | } |
| 10645 | |
| 10646 | return TRUE; |
| 10647 | } |
| 10648 | |
| 10649 | static bool |
| 10650 | necp_is_range_in_range(struct sockaddr *inner_range_start, struct sockaddr *inner_range_end, struct sockaddr *range_start, struct sockaddr *range_end) |
| 10651 | { |
| 10652 | int cmp = 0; |
| 10653 | |
| 10654 | if (inner_range_start == NULL || inner_range_end == NULL || range_start == NULL || range_end == NULL) { |
| 10655 | return FALSE; |
| 10656 | } |
| 10657 | |
| 10658 | /* Must be greater than or equal to start */ |
| 10659 | cmp = necp_addr_compare(sa1: inner_range_start, sa2: range_start, check_port: 1); |
| 10660 | if (cmp != 0 && cmp != 1) { |
| 10661 | return FALSE; |
| 10662 | } |
| 10663 | |
| 10664 | /* Must be less than or equal to end */ |
| 10665 | cmp = necp_addr_compare(sa1: inner_range_end, sa2: range_end, check_port: 1); |
| 10666 | if (cmp != 0 && cmp != -1) { |
| 10667 | return FALSE; |
| 10668 | } |
| 10669 | |
| 10670 | return TRUE; |
| 10671 | } |
| 10672 | |
| 10673 | static bool |
| 10674 | necp_is_addr_in_subnet(struct sockaddr *addr, struct sockaddr *subnet_addr, u_int8_t subnet_prefix) |
| 10675 | { |
| 10676 | if (addr == NULL || subnet_addr == NULL) { |
| 10677 | return FALSE; |
| 10678 | } |
| 10679 | |
| 10680 | if (addr->sa_family != subnet_addr->sa_family || addr->sa_len != subnet_addr->sa_len) { |
| 10681 | return FALSE; |
| 10682 | } |
| 10683 | |
| 10684 | switch (addr->sa_family) { |
| 10685 | case AF_INET: { |
| 10686 | if (satosin(subnet_addr)->sin_port != 0 && |
| 10687 | satosin(addr)->sin_port != satosin(subnet_addr)->sin_port) { |
| 10688 | return FALSE; |
| 10689 | } |
| 10690 | return necp_buffer_compare_with_bit_prefix(p1: (u_int8_t *)&satosin(addr)->sin_addr, p2: (u_int8_t *)&satosin(subnet_addr)->sin_addr, bits: subnet_prefix); |
| 10691 | } |
| 10692 | case AF_INET6: { |
| 10693 | if (satosin6(subnet_addr)->sin6_port != 0 && |
| 10694 | satosin6(addr)->sin6_port != satosin6(subnet_addr)->sin6_port) { |
| 10695 | return FALSE; |
| 10696 | } |
| 10697 | if (satosin6(addr)->sin6_scope_id && |
| 10698 | satosin6(subnet_addr)->sin6_scope_id && |
| 10699 | satosin6(addr)->sin6_scope_id != satosin6(subnet_addr)->sin6_scope_id) { |
| 10700 | return FALSE; |
| 10701 | } |
| 10702 | return necp_buffer_compare_with_bit_prefix(p1: (u_int8_t *)&satosin6(addr)->sin6_addr, p2: (u_int8_t *)&satosin6(subnet_addr)->sin6_addr, bits: subnet_prefix); |
| 10703 | } |
| 10704 | default: { |
| 10705 | return FALSE; |
| 10706 | } |
| 10707 | } |
| 10708 | |
| 10709 | return FALSE; |
| 10710 | } |
| 10711 | |
| 10712 | /* |
| 10713 | * Return values: |
| 10714 | * -1: sa1 < sa2 |
| 10715 | * 0: sa1 == sa2 |
| 10716 | * 1: sa1 > sa2 |
| 10717 | * 2: Not comparable or error |
| 10718 | */ |
| 10719 | static int |
| 10720 | necp_addr_compare(struct sockaddr *sa1, struct sockaddr *sa2, int check_port) |
| 10721 | { |
| 10722 | int result = 0; |
| 10723 | int port_result = 0; |
| 10724 | |
| 10725 | if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { |
| 10726 | return 2; |
| 10727 | } |
| 10728 | |
| 10729 | if (sa1->sa_len == 0) { |
| 10730 | return 0; |
| 10731 | } |
| 10732 | |
| 10733 | switch (sa1->sa_family) { |
| 10734 | case AF_INET: { |
| 10735 | if (sa1->sa_len != sizeof(struct sockaddr_in)) { |
| 10736 | return 2; |
| 10737 | } |
| 10738 | |
| 10739 | result = memcmp(s1: &satosin(sa1)->sin_addr.s_addr, s2: &satosin(sa2)->sin_addr.s_addr, n: sizeof(satosin(sa1)->sin_addr.s_addr)); |
| 10740 | |
| 10741 | if (check_port) { |
| 10742 | if (satosin(sa1)->sin_port < satosin(sa2)->sin_port) { |
| 10743 | port_result = -1; |
| 10744 | } else if (satosin(sa1)->sin_port > satosin(sa2)->sin_port) { |
| 10745 | port_result = 1; |
| 10746 | } |
| 10747 | |
| 10748 | if (result == 0) { |
| 10749 | result = port_result; |
| 10750 | } else if ((result > 0 && port_result < 0) || (result < 0 && port_result > 0)) { |
| 10751 | return 2; |
| 10752 | } |
| 10753 | } |
| 10754 | |
| 10755 | break; |
| 10756 | } |
| 10757 | case AF_INET6: { |
| 10758 | if (sa1->sa_len != sizeof(struct sockaddr_in6)) { |
| 10759 | return 2; |
| 10760 | } |
| 10761 | |
| 10762 | if (satosin6(sa1)->sin6_scope_id != satosin6(sa2)->sin6_scope_id) { |
| 10763 | return 2; |
| 10764 | } |
| 10765 | |
| 10766 | result = memcmp(s1: &satosin6(sa1)->sin6_addr.s6_addr[0], s2: &satosin6(sa2)->sin6_addr.s6_addr[0], n: sizeof(struct in6_addr)); |
| 10767 | |
| 10768 | if (check_port) { |
| 10769 | if (satosin6(sa1)->sin6_port < satosin6(sa2)->sin6_port) { |
| 10770 | port_result = -1; |
| 10771 | } else if (satosin6(sa1)->sin6_port > satosin6(sa2)->sin6_port) { |
| 10772 | port_result = 1; |
| 10773 | } |
| 10774 | |
| 10775 | if (result == 0) { |
| 10776 | result = port_result; |
| 10777 | } else if ((result > 0 && port_result < 0) || (result < 0 && port_result > 0)) { |
| 10778 | return 2; |
| 10779 | } |
| 10780 | } |
| 10781 | |
| 10782 | break; |
| 10783 | } |
| 10784 | default: { |
| 10785 | result = memcmp(s1: sa1, s2: sa2, n: sa1->sa_len); |
| 10786 | break; |
| 10787 | } |
| 10788 | } |
| 10789 | |
| 10790 | if (result < 0) { |
| 10791 | result = (-1); |
| 10792 | } else if (result > 0) { |
| 10793 | result = (1); |
| 10794 | } |
| 10795 | |
| 10796 | return result; |
| 10797 | } |
| 10798 | |
| 10799 | static bool |
| 10800 | necp_buffer_compare_with_bit_prefix(u_int8_t *p1, u_int8_t *p2, u_int32_t bits) |
| 10801 | { |
| 10802 | u_int8_t mask; |
| 10803 | |
| 10804 | /* Handle null pointers */ |
| 10805 | if (p1 == NULL || p2 == NULL) { |
| 10806 | return p1 == p2; |
| 10807 | } |
| 10808 | |
| 10809 | while (bits >= 8) { |
| 10810 | if (*p1++ != *p2++) { |
| 10811 | return FALSE; |
| 10812 | } |
| 10813 | bits -= 8; |
| 10814 | } |
| 10815 | |
| 10816 | if (bits > 0) { |
| 10817 | mask = ~((1 << (8 - bits)) - 1); |
| 10818 | if ((*p1 & mask) != (*p2 & mask)) { |
| 10819 | return FALSE; |
| 10820 | } |
| 10821 | } |
| 10822 | return TRUE; |
| 10823 | } |
| 10824 | |
| 10825 | static bool |
| 10826 | necp_addr_is_empty(struct sockaddr *addr) |
| 10827 | { |
| 10828 | if (addr == NULL) { |
| 10829 | return TRUE; |
| 10830 | } |
| 10831 | |
| 10832 | if (addr->sa_len == 0) { |
| 10833 | return TRUE; |
| 10834 | } |
| 10835 | |
| 10836 | switch (addr->sa_family) { |
| 10837 | case AF_INET: { |
| 10838 | static struct sockaddr_in ipv4_empty_address = { |
| 10839 | .sin_len = sizeof(struct sockaddr_in), |
| 10840 | .sin_family = AF_INET, |
| 10841 | .sin_port = 0, |
| 10842 | .sin_addr = { .s_addr = 0 }, // 0.0.0.0 |
| 10843 | .sin_zero = {0}, |
| 10844 | }; |
| 10845 | if (necp_addr_compare(sa1: addr, sa2: (struct sockaddr *)&ipv4_empty_address, check_port: 0) == 0) { |
| 10846 | return TRUE; |
| 10847 | } else { |
| 10848 | return FALSE; |
| 10849 | } |
| 10850 | } |
| 10851 | case AF_INET6: { |
| 10852 | static struct sockaddr_in6 ipv6_empty_address = { |
| 10853 | .sin6_len = sizeof(struct sockaddr_in6), |
| 10854 | .sin6_family = AF_INET6, |
| 10855 | .sin6_port = 0, |
| 10856 | .sin6_flowinfo = 0, |
| 10857 | .sin6_addr = IN6ADDR_ANY_INIT, // :: |
| 10858 | .sin6_scope_id = 0, |
| 10859 | }; |
| 10860 | if (necp_addr_compare(sa1: addr, sa2: (struct sockaddr *)&ipv6_empty_address, check_port: 0) == 0) { |
| 10861 | return TRUE; |
| 10862 | } else { |
| 10863 | return FALSE; |
| 10864 | } |
| 10865 | } |
| 10866 | default: |
| 10867 | return FALSE; |
| 10868 | } |
| 10869 | |
| 10870 | return FALSE; |
| 10871 | } |
| 10872 | |
| 10873 | static bool |
| 10874 | necp_update_qos_marking(struct ifnet *ifp, u_int32_t *netagent_array, size_t netagent_array_count, u_int32_t route_rule_id) |
| 10875 | { |
| 10876 | bool qos_marking = FALSE; |
| 10877 | int exception_index = 0; |
| 10878 | struct necp_route_rule *route_rule = NULL; |
| 10879 | |
| 10880 | route_rule = necp_lookup_route_rule_locked(list: &necp_route_rules, route_rule_id); |
| 10881 | if (route_rule == NULL) { |
| 10882 | qos_marking = FALSE; |
| 10883 | goto done; |
| 10884 | } |
| 10885 | |
| 10886 | if (route_rule->match_netagent_id != 0) { |
| 10887 | if (netagent_array == NULL || netagent_array_count == 0) { |
| 10888 | // No agents, ignore rule |
| 10889 | goto done; |
| 10890 | } |
| 10891 | bool found_match = FALSE; |
| 10892 | for (size_t agent_index = 0; agent_index < netagent_array_count; agent_index++) { |
| 10893 | if (route_rule->match_netagent_id == netagent_array[agent_index]) { |
| 10894 | found_match = TRUE; |
| 10895 | break; |
| 10896 | } |
| 10897 | } |
| 10898 | if (!found_match) { |
| 10899 | // Agents don't match, ignore rule |
| 10900 | goto done; |
| 10901 | } |
| 10902 | } |
| 10903 | |
| 10904 | qos_marking = (route_rule->default_action == NECP_ROUTE_RULE_QOS_MARKING) ? TRUE : FALSE; |
| 10905 | |
| 10906 | if (ifp == NULL) { |
| 10907 | goto done; |
| 10908 | } |
| 10909 | |
| 10910 | for (exception_index = 0; exception_index < MAX_ROUTE_RULE_INTERFACES; exception_index++) { |
| 10911 | if (route_rule->exception_if_indices[exception_index] == 0) { |
| 10912 | break; |
| 10913 | } |
| 10914 | if (route_rule->exception_if_actions[exception_index] != NECP_ROUTE_RULE_QOS_MARKING) { |
| 10915 | continue; |
| 10916 | } |
| 10917 | if (route_rule->exception_if_indices[exception_index] == ifp->if_index) { |
| 10918 | qos_marking = TRUE; |
| 10919 | if (necp_debug > 2) { |
| 10920 | NECPLOG(LOG_DEBUG, "QoS Marking : Interface match %d for Rule %d Allowed %d", |
| 10921 | route_rule->exception_if_indices[exception_index], route_rule_id, qos_marking); |
| 10922 | } |
| 10923 | goto done; |
| 10924 | } |
| 10925 | } |
| 10926 | |
| 10927 | if ((route_rule->cellular_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_CELLULAR(ifp)) || |
| 10928 | (route_rule->wifi_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_WIFI(ifp)) || |
| 10929 | (route_rule->wired_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_WIRED(ifp)) || |
| 10930 | (route_rule->expensive_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_EXPENSIVE(ifp)) || |
| 10931 | (route_rule->constrained_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_CONSTRAINED(ifp)) || |
| 10932 | (route_rule->companion_action == NECP_ROUTE_RULE_QOS_MARKING && IFNET_IS_COMPANION_LINK(ifp))) { |
| 10933 | qos_marking = TRUE; |
| 10934 | if (necp_debug > 2) { |
| 10935 | NECPLOG(LOG_DEBUG, "QoS Marking: C:%d WF:%d W:%d E:%d Cn:%d Cmpn:%d for Rule %d Allowed %d", |
| 10936 | route_rule->cellular_action, route_rule->wifi_action, route_rule->wired_action, |
| 10937 | route_rule->expensive_action, route_rule->constrained_action, route_rule->companion_action, route_rule_id, qos_marking); |
| 10938 | } |
| 10939 | goto done; |
| 10940 | } |
| 10941 | done: |
| 10942 | if (necp_debug > 1) { |
| 10943 | NECPLOG(LOG_DEBUG, "QoS Marking: Rule %d ifp %s Allowed %d", |
| 10944 | route_rule_id, ifp ? ifp->if_xname : "", qos_marking); |
| 10945 | } |
| 10946 | return qos_marking; |
| 10947 | } |
| 10948 | |
| 10949 | bool |
| 10950 | necp_lookup_current_qos_marking(int32_t *qos_marking_gencount, struct rtentry *route, struct ifnet *interface, u_int32_t route_rule_id, bool old_qos_marking) |
| 10951 | { |
| 10952 | bool new_qos_marking = old_qos_marking; |
| 10953 | struct ifnet *ifp = interface; |
| 10954 | |
| 10955 | if (net_qos_policy_restricted == 0) { |
| 10956 | return new_qos_marking; |
| 10957 | } |
| 10958 | |
| 10959 | /* |
| 10960 | * This is racy but we do not need the performance hit of taking necp_kernel_policy_lock |
| 10961 | */ |
| 10962 | if (*qos_marking_gencount == necp_kernel_socket_policies_gencount) { |
| 10963 | return new_qos_marking; |
| 10964 | } |
| 10965 | |
| 10966 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 10967 | |
| 10968 | if (ifp == NULL && route != NULL) { |
| 10969 | ifp = route->rt_ifp; |
| 10970 | } |
| 10971 | /* |
| 10972 | * By default, until we have a interface, do not mark and reevaluate the Qos marking policy |
| 10973 | */ |
| 10974 | if (ifp == NULL || route_rule_id == 0) { |
| 10975 | new_qos_marking = FALSE; |
| 10976 | goto done; |
| 10977 | } |
| 10978 | |
| 10979 | if (ROUTE_RULE_IS_AGGREGATE(route_rule_id)) { |
| 10980 | struct necp_aggregate_route_rule *aggregate_route_rule = necp_lookup_aggregate_route_rule_locked(route_rule_id); |
| 10981 | if (aggregate_route_rule != NULL) { |
| 10982 | int index = 0; |
| 10983 | for (index = 0; index < MAX_AGGREGATE_ROUTE_RULES; index++) { |
| 10984 | u_int32_t sub_route_rule_id = aggregate_route_rule->rule_ids[index]; |
| 10985 | if (sub_route_rule_id == 0) { |
| 10986 | break; |
| 10987 | } |
| 10988 | new_qos_marking = necp_update_qos_marking(ifp, NULL, netagent_array_count: 0, route_rule_id: sub_route_rule_id); |
| 10989 | if (new_qos_marking == TRUE) { |
| 10990 | break; |
| 10991 | } |
| 10992 | } |
| 10993 | } |
| 10994 | } else { |
| 10995 | new_qos_marking = necp_update_qos_marking(ifp, NULL, netagent_array_count: 0, route_rule_id); |
| 10996 | } |
| 10997 | /* |
| 10998 | * Now that we have an interface we remember the gencount |
| 10999 | */ |
| 11000 | *qos_marking_gencount = necp_kernel_socket_policies_gencount; |
| 11001 | |
| 11002 | done: |
| 11003 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 11004 | return new_qos_marking; |
| 11005 | } |
| 11006 | |
| 11007 | void |
| 11008 | necp_socket_update_qos_marking(struct inpcb *inp, struct rtentry *route, u_int32_t route_rule_id) |
| 11009 | { |
| 11010 | bool qos_marking = inp->inp_socket->so_flags1 & SOF1_QOSMARKING_ALLOWED ? TRUE : FALSE; |
| 11011 | |
| 11012 | if (net_qos_policy_restricted == 0) { |
| 11013 | return; |
| 11014 | } |
| 11015 | if (inp->inp_socket == NULL) { |
| 11016 | return; |
| 11017 | } |
| 11018 | if ((inp->inp_socket->so_flags1 & SOF1_QOSMARKING_POLICY_OVERRIDE)) { |
| 11019 | return; |
| 11020 | } |
| 11021 | |
| 11022 | qos_marking = necp_lookup_current_qos_marking(qos_marking_gencount: &(inp->inp_policyresult.results.qos_marking_gencount), route, NULL, route_rule_id, old_qos_marking: qos_marking); |
| 11023 | |
| 11024 | if (qos_marking == TRUE) { |
| 11025 | inp->inp_socket->so_flags1 |= SOF1_QOSMARKING_ALLOWED; |
| 11026 | } else { |
| 11027 | inp->inp_socket->so_flags1 &= ~SOF1_QOSMARKING_ALLOWED; |
| 11028 | } |
| 11029 | } |
| 11030 | |
| 11031 | static bool |
| 11032 | necp_route_is_lqm_abort(struct ifnet *ifp, struct ifnet *delegated_ifp) |
| 11033 | { |
| 11034 | if (ifp != NULL && |
| 11035 | (ifp->if_interface_state.valid_bitmask & IF_INTERFACE_STATE_LQM_STATE_VALID) && |
| 11036 | ifp->if_interface_state.lqm_state == IFNET_LQM_THRESH_ABORT) { |
| 11037 | return true; |
| 11038 | } |
| 11039 | if (delegated_ifp != NULL && |
| 11040 | (delegated_ifp->if_interface_state.valid_bitmask & IF_INTERFACE_STATE_LQM_STATE_VALID) && |
| 11041 | delegated_ifp->if_interface_state.lqm_state == IFNET_LQM_THRESH_ABORT) { |
| 11042 | return true; |
| 11043 | } |
| 11044 | return false; |
| 11045 | } |
| 11046 | |
| 11047 | static bool |
| 11048 | necp_route_is_allowed_inner(struct rtentry *route, struct ifnet *ifp, u_int32_t *netagent_array, size_t netagent_array_count, |
| 11049 | u_int32_t route_rule_id, u_int32_t *interface_type_denied) |
| 11050 | { |
| 11051 | bool default_is_allowed = TRUE; |
| 11052 | u_int8_t type_aggregate_action = NECP_ROUTE_RULE_NONE; |
| 11053 | int exception_index = 0; |
| 11054 | struct ifnet *delegated_ifp = NULL; |
| 11055 | struct necp_route_rule *route_rule = NULL; |
| 11056 | |
| 11057 | route_rule = necp_lookup_route_rule_locked(list: &necp_route_rules, route_rule_id); |
| 11058 | if (route_rule == NULL) { |
| 11059 | return TRUE; |
| 11060 | } |
| 11061 | |
| 11062 | if (route_rule->match_netagent_id != 0) { |
| 11063 | if (netagent_array == NULL || netagent_array_count == 0) { |
| 11064 | // No agents, ignore rule |
| 11065 | return TRUE; |
| 11066 | } |
| 11067 | bool found_match = FALSE; |
| 11068 | for (size_t agent_index = 0; agent_index < netagent_array_count; agent_index++) { |
| 11069 | if (route_rule->match_netagent_id == netagent_array[agent_index]) { |
| 11070 | found_match = TRUE; |
| 11071 | break; |
| 11072 | } |
| 11073 | } |
| 11074 | if (!found_match) { |
| 11075 | // Agents don't match, ignore rule |
| 11076 | return TRUE; |
| 11077 | } |
| 11078 | } |
| 11079 | |
| 11080 | default_is_allowed = IS_NECP_ROUTE_RULE_DENY(route_rule->default_action) ? FALSE : TRUE; |
| 11081 | if (ifp == NULL && route != NULL) { |
| 11082 | ifp = route->rt_ifp; |
| 11083 | } |
| 11084 | if (ifp == NULL) { |
| 11085 | if (necp_debug > 1 && !default_is_allowed) { |
| 11086 | NECPLOG(LOG_DEBUG, "Route Allowed: No interface for route, using default for Rule %d Allowed %d", route_rule_id, default_is_allowed); |
| 11087 | } |
| 11088 | return default_is_allowed; |
| 11089 | } |
| 11090 | |
| 11091 | delegated_ifp = ifp->if_delegated.ifp; |
| 11092 | for (exception_index = 0; exception_index < MAX_ROUTE_RULE_INTERFACES; exception_index++) { |
| 11093 | if (route_rule->exception_if_indices[exception_index] == 0) { |
| 11094 | break; |
| 11095 | } |
| 11096 | if (route_rule->exception_if_indices[exception_index] == ifp->if_index || |
| 11097 | (delegated_ifp != NULL && route_rule->exception_if_indices[exception_index] == delegated_ifp->if_index)) { |
| 11098 | if (route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_DENY_LQM_ABORT) { |
| 11099 | const bool lqm_abort = necp_route_is_lqm_abort(ifp, delegated_ifp); |
| 11100 | if (necp_debug > 1 && lqm_abort) { |
| 11101 | NECPLOG(LOG_DEBUG, "Route Allowed: Interface match %d for Rule %d Deny LQM Abort", |
| 11102 | route_rule->exception_if_indices[exception_index], route_rule_id); |
| 11103 | } |
| 11104 | return false; |
| 11105 | } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->exception_if_actions[exception_index])) { |
| 11106 | if (necp_debug > 1) { |
| 11107 | NECPLOG(LOG_DEBUG, "Route Allowed: Interface match %d for Rule %d Allowed %d", route_rule->exception_if_indices[exception_index], route_rule_id, (IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[exception_index]) ? FALSE : TRUE)); |
| 11108 | } |
| 11109 | if (IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[exception_index]) && route_rule->effective_type != 0 && interface_type_denied != NULL) { |
| 11110 | *interface_type_denied = route_rule->effective_type; |
| 11111 | } |
| 11112 | return IS_NECP_ROUTE_RULE_DENY(route_rule->exception_if_actions[exception_index]) ? FALSE : TRUE; |
| 11113 | } |
| 11114 | } |
| 11115 | } |
| 11116 | |
| 11117 | if (IFNET_IS_CELLULAR(ifp)) { |
| 11118 | if (route_rule->cellular_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) { |
| 11119 | if (necp_route_is_lqm_abort(ifp, delegated_ifp)) { |
| 11120 | if (interface_type_denied != NULL) { |
| 11121 | *interface_type_denied = IFRTYPE_FUNCTIONAL_CELLULAR; |
| 11122 | if (route_rule->effective_type != 0) { |
| 11123 | *interface_type_denied = route_rule->effective_type; |
| 11124 | } |
| 11125 | } |
| 11126 | // Mark aggregate action as deny |
| 11127 | type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE; |
| 11128 | } |
| 11129 | } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->cellular_action)) { |
| 11130 | if (interface_type_denied != NULL) { |
| 11131 | *interface_type_denied = IFRTYPE_FUNCTIONAL_CELLULAR; |
| 11132 | if (route_rule->effective_type != 0) { |
| 11133 | *interface_type_denied = route_rule->effective_type; |
| 11134 | } |
| 11135 | } |
| 11136 | if (type_aggregate_action == NECP_ROUTE_RULE_NONE || |
| 11137 | (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE && |
| 11138 | IS_NECP_ROUTE_RULE_DENY(route_rule->cellular_action))) { |
| 11139 | // Deny wins if there is a conflict |
| 11140 | type_aggregate_action = route_rule->cellular_action; |
| 11141 | } |
| 11142 | } |
| 11143 | } |
| 11144 | |
| 11145 | if (IFNET_IS_WIFI(ifp)) { |
| 11146 | if (route_rule->wifi_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) { |
| 11147 | if (necp_route_is_lqm_abort(ifp, delegated_ifp)) { |
| 11148 | if (interface_type_denied != NULL) { |
| 11149 | *interface_type_denied = IFRTYPE_FUNCTIONAL_WIFI_INFRA; |
| 11150 | if (route_rule->effective_type != 0) { |
| 11151 | *interface_type_denied = route_rule->effective_type; |
| 11152 | } |
| 11153 | } |
| 11154 | // Mark aggregate action as deny |
| 11155 | type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE; |
| 11156 | } |
| 11157 | } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->wifi_action)) { |
| 11158 | if (interface_type_denied != NULL) { |
| 11159 | *interface_type_denied = IFRTYPE_FUNCTIONAL_WIFI_INFRA; |
| 11160 | if (route_rule->effective_type != 0) { |
| 11161 | *interface_type_denied = route_rule->effective_type; |
| 11162 | } |
| 11163 | } |
| 11164 | if (type_aggregate_action == NECP_ROUTE_RULE_NONE || |
| 11165 | (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE && |
| 11166 | IS_NECP_ROUTE_RULE_DENY(route_rule->wifi_action))) { |
| 11167 | // Deny wins if there is a conflict |
| 11168 | type_aggregate_action = route_rule->wifi_action; |
| 11169 | } |
| 11170 | } |
| 11171 | } |
| 11172 | |
| 11173 | if (IFNET_IS_COMPANION_LINK(ifp) || |
| 11174 | (ifp->if_delegated.ifp != NULL && IFNET_IS_COMPANION_LINK(ifp->if_delegated.ifp))) { |
| 11175 | if (route_rule->companion_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) { |
| 11176 | if (necp_route_is_lqm_abort(ifp, delegated_ifp)) { |
| 11177 | if (interface_type_denied != NULL) { |
| 11178 | *interface_type_denied = IFRTYPE_FUNCTIONAL_COMPANIONLINK; |
| 11179 | if (route_rule->effective_type != 0) { |
| 11180 | *interface_type_denied = route_rule->effective_type; |
| 11181 | } |
| 11182 | } |
| 11183 | // Mark aggregate action as deny |
| 11184 | type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE; |
| 11185 | } |
| 11186 | } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->companion_action)) { |
| 11187 | if (interface_type_denied != NULL) { |
| 11188 | *interface_type_denied = IFRTYPE_FUNCTIONAL_COMPANIONLINK; |
| 11189 | if (route_rule->effective_type != 0) { |
| 11190 | *interface_type_denied = route_rule->effective_type; |
| 11191 | } |
| 11192 | } |
| 11193 | if (type_aggregate_action == NECP_ROUTE_RULE_NONE || |
| 11194 | (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE && |
| 11195 | IS_NECP_ROUTE_RULE_DENY(route_rule->companion_action))) { |
| 11196 | // Deny wins if there is a conflict |
| 11197 | type_aggregate_action = route_rule->companion_action; |
| 11198 | } |
| 11199 | } |
| 11200 | } |
| 11201 | |
| 11202 | if (IFNET_IS_WIRED(ifp)) { |
| 11203 | if (route_rule->wired_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) { |
| 11204 | if (necp_route_is_lqm_abort(ifp, delegated_ifp)) { |
| 11205 | if (interface_type_denied != NULL) { |
| 11206 | *interface_type_denied = IFRTYPE_FUNCTIONAL_WIRED; |
| 11207 | if (route_rule->effective_type != 0) { |
| 11208 | *interface_type_denied = route_rule->effective_type; |
| 11209 | } |
| 11210 | } |
| 11211 | // Mark aggregate action as deny |
| 11212 | type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE; |
| 11213 | } |
| 11214 | } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->wired_action)) { |
| 11215 | if (interface_type_denied != NULL) { |
| 11216 | *interface_type_denied = IFRTYPE_FUNCTIONAL_WIRED; |
| 11217 | if (route_rule->effective_type != 0) { |
| 11218 | *interface_type_denied = route_rule->effective_type; |
| 11219 | } |
| 11220 | } |
| 11221 | if (type_aggregate_action == NECP_ROUTE_RULE_NONE || |
| 11222 | (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE && |
| 11223 | IS_NECP_ROUTE_RULE_DENY(route_rule->wired_action))) { |
| 11224 | // Deny wins if there is a conflict |
| 11225 | type_aggregate_action = route_rule->wired_action; |
| 11226 | } |
| 11227 | } |
| 11228 | } |
| 11229 | |
| 11230 | if (IFNET_IS_EXPENSIVE(ifp)) { |
| 11231 | if (route_rule->expensive_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) { |
| 11232 | if (necp_route_is_lqm_abort(ifp, delegated_ifp)) { |
| 11233 | // Mark aggregate action as deny |
| 11234 | type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE; |
| 11235 | } |
| 11236 | } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->expensive_action)) { |
| 11237 | if (type_aggregate_action == NECP_ROUTE_RULE_NONE || |
| 11238 | (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE && |
| 11239 | IS_NECP_ROUTE_RULE_DENY(route_rule->expensive_action))) { |
| 11240 | // Deny wins if there is a conflict |
| 11241 | type_aggregate_action = route_rule->expensive_action; |
| 11242 | } |
| 11243 | } |
| 11244 | } |
| 11245 | |
| 11246 | if (IFNET_IS_CONSTRAINED(ifp)) { |
| 11247 | if (route_rule->constrained_action == NECP_ROUTE_RULE_DENY_LQM_ABORT) { |
| 11248 | if (necp_route_is_lqm_abort(ifp, delegated_ifp)) { |
| 11249 | // Mark aggregate action as deny |
| 11250 | type_aggregate_action = NECP_ROUTE_RULE_DENY_INTERFACE; |
| 11251 | } |
| 11252 | } else if (IS_NECP_ROUTE_RULE_ALLOW_OR_DENY(route_rule->constrained_action)) { |
| 11253 | if (type_aggregate_action == NECP_ROUTE_RULE_NONE || |
| 11254 | (type_aggregate_action == NECP_ROUTE_RULE_ALLOW_INTERFACE && |
| 11255 | IS_NECP_ROUTE_RULE_DENY(route_rule->constrained_action))) { |
| 11256 | // Deny wins if there is a conflict |
| 11257 | type_aggregate_action = route_rule->constrained_action; |
| 11258 | } |
| 11259 | } |
| 11260 | } |
| 11261 | |
| 11262 | if (type_aggregate_action != NECP_ROUTE_RULE_NONE) { |
| 11263 | if (necp_debug > 1) { |
| 11264 | NECPLOG(LOG_DEBUG, "Route Allowed: C:%d WF:%d W:%d E:%d Cmpn:%d for Rule %d Allowed %d", route_rule->cellular_action, route_rule->wifi_action, route_rule->wired_action, route_rule->expensive_action, route_rule->companion_action, route_rule_id, (IS_NECP_ROUTE_RULE_DENY(type_aggregate_action) ? FALSE : TRUE)); |
| 11265 | } |
| 11266 | return IS_NECP_ROUTE_RULE_DENY(type_aggregate_action) ? FALSE : TRUE; |
| 11267 | } |
| 11268 | |
| 11269 | if (necp_debug > 1 && !default_is_allowed) { |
| 11270 | NECPLOG(LOG_DEBUG, "Route Allowed: Using default for Rule %d Allowed %d", route_rule_id, default_is_allowed); |
| 11271 | } |
| 11272 | return default_is_allowed; |
| 11273 | } |
| 11274 | |
| 11275 | static bool |
| 11276 | necp_proc_is_allowed_on_management_interface(proc_t proc) |
| 11277 | { |
| 11278 | bool allowed = false; |
| 11279 | const task_t task = proc_task(proc); |
| 11280 | |
| 11281 | if (task != NULL) { |
| 11282 | if (IOTaskHasEntitlement(task, INTCOPROC_RESTRICTED_ENTITLEMENT) == true |
| 11283 | || IOTaskHasEntitlement(task, MANAGEMENT_DATA_ENTITLEMENT) == true |
| 11284 | #if DEBUG || DEVELOPMENT |
| 11285 | || IOTaskHasEntitlement(task, INTCOPROC_RESTRICTED_ENTITLEMENT_DEVELOPMENT) == true |
| 11286 | || IOTaskHasEntitlement(task, MANAGEMENT_DATA_ENTITLEMENT_DEVELOPMENT) == true |
| 11287 | #endif /* DEBUG || DEVELOPMENT */ |
| 11288 | ) { |
| 11289 | allowed = true; |
| 11290 | } |
| 11291 | } |
| 11292 | return allowed; |
| 11293 | } |
| 11294 | |
| 11295 | __attribute__((noinline)) |
| 11296 | static void |
| 11297 | necp_log_interface_not_allowed(struct ifnet *ifp, proc_t proc, struct inpcb *inp) |
| 11298 | { |
| 11299 | char buf[128]; |
| 11300 | |
| 11301 | if (inp != NULL) { |
| 11302 | inp_snprintf_tuple(inp, buf, sizeof(buf)); |
| 11303 | } else { |
| 11304 | *buf = 0; |
| 11305 | } |
| 11306 | os_log(OS_LOG_DEFAULT, |
| 11307 | "necp_route_is_interface_type_allowed %s:%d %s not allowed on management interface %s", |
| 11308 | proc != NULL ? proc_best_name(proc) : proc_best_name(current_proc()), |
| 11309 | proc != NULL ? proc_getpid(proc) : proc_selfpid(), |
| 11310 | inp != NULL ? buf : "", |
| 11311 | ifp->if_xname); |
| 11312 | } |
| 11313 | |
| 11314 | static bool |
| 11315 | necp_route_is_interface_type_allowed(struct rtentry *route, struct ifnet *ifp, proc_t proc, struct inpcb *inp) |
| 11316 | { |
| 11317 | if (if_management_interface_check_needed == false) { |
| 11318 | return true; |
| 11319 | } |
| 11320 | if (necp_drop_management_order == 0) { |
| 11321 | return true; |
| 11322 | } |
| 11323 | if (ifp == NULL && route != NULL) { |
| 11324 | ifp = route->rt_ifp; |
| 11325 | } |
| 11326 | if (ifp == NULL) { |
| 11327 | return true; |
| 11328 | } |
| 11329 | |
| 11330 | if (IFNET_IS_MANAGEMENT(ifp)) { |
| 11331 | bool allowed = true; |
| 11332 | |
| 11333 | if (inp != NULL) { |
| 11334 | /* |
| 11335 | * The entitlement check is already performed for socket flows |
| 11336 | */ |
| 11337 | allowed = INP_MANAGEMENT_ALLOWED(inp); |
| 11338 | } else if (proc != NULL) { |
| 11339 | allowed = necp_proc_is_allowed_on_management_interface(proc); |
| 11340 | } |
| 11341 | if (__improbable(if_management_verbose > 1 && allowed == false)) { |
| 11342 | necp_log_interface_not_allowed(ifp, proc, inp); |
| 11343 | } |
| 11344 | return allowed; |
| 11345 | } |
| 11346 | return true; |
| 11347 | } |
| 11348 | |
| 11349 | static bool |
| 11350 | necp_route_is_allowed(struct rtentry *route, struct ifnet *interface, u_int32_t *netagent_array, size_t netagent_array_count, |
| 11351 | u_int32_t route_rule_id, u_int32_t *interface_type_denied) |
| 11352 | { |
| 11353 | if ((route == NULL && interface == NULL && netagent_array == NULL) || route_rule_id == 0) { |
| 11354 | if (necp_debug > 1) { |
| 11355 | NECPLOG(LOG_DEBUG, "Route Allowed: no route or interface, Rule %d Allowed %d", route_rule_id, TRUE); |
| 11356 | } |
| 11357 | return TRUE; |
| 11358 | } |
| 11359 | |
| 11360 | if (ROUTE_RULE_IS_AGGREGATE(route_rule_id)) { |
| 11361 | struct necp_aggregate_route_rule *aggregate_route_rule = necp_lookup_aggregate_route_rule_locked(route_rule_id); |
| 11362 | if (aggregate_route_rule != NULL) { |
| 11363 | int index = 0; |
| 11364 | for (index = 0; index < MAX_AGGREGATE_ROUTE_RULES; index++) { |
| 11365 | u_int32_t sub_route_rule_id = aggregate_route_rule->rule_ids[index]; |
| 11366 | if (sub_route_rule_id == 0) { |
| 11367 | break; |
| 11368 | } |
| 11369 | if (!necp_route_is_allowed_inner(route, ifp: interface, netagent_array, netagent_array_count, route_rule_id: sub_route_rule_id, interface_type_denied)) { |
| 11370 | return FALSE; |
| 11371 | } |
| 11372 | } |
| 11373 | } |
| 11374 | } else { |
| 11375 | return necp_route_is_allowed_inner(route, ifp: interface, netagent_array, netagent_array_count, route_rule_id, interface_type_denied); |
| 11376 | } |
| 11377 | |
| 11378 | return TRUE; |
| 11379 | } |
| 11380 | |
| 11381 | static bool |
| 11382 | necp_route_rule_matches_agents(u_int32_t route_rule_id) |
| 11383 | { |
| 11384 | struct necp_route_rule *route_rule = necp_lookup_route_rule_locked(list: &necp_route_rules, route_rule_id); |
| 11385 | if (route_rule == NULL) { |
| 11386 | return false; |
| 11387 | } |
| 11388 | |
| 11389 | return route_rule->match_netagent_id != 0; |
| 11390 | } |
| 11391 | |
| 11392 | static uint32_t |
| 11393 | necp_route_get_netagent(struct rtentry *route, u_int32_t *netagent_array, size_t netagent_array_count, u_int32_t route_rule_id, bool *remove) |
| 11394 | { |
| 11395 | if (remove == NULL) { |
| 11396 | return 0; |
| 11397 | } |
| 11398 | |
| 11399 | struct necp_route_rule *route_rule = necp_lookup_route_rule_locked(list: &necp_route_rules, route_rule_id); |
| 11400 | if (route_rule == NULL) { |
| 11401 | return 0; |
| 11402 | } |
| 11403 | |
| 11404 | // No netagent, skip |
| 11405 | if (route_rule->netagent_id == 0) { |
| 11406 | return 0; |
| 11407 | } |
| 11408 | |
| 11409 | if (route_rule->match_netagent_id != 0) { |
| 11410 | if (netagent_array == NULL || netagent_array_count == 0) { |
| 11411 | // No agents, ignore rule |
| 11412 | return 0; |
| 11413 | } |
| 11414 | bool found_match = FALSE; |
| 11415 | for (size_t agent_index = 0; agent_index < netagent_array_count; agent_index++) { |
| 11416 | if (route_rule->match_netagent_id == netagent_array[agent_index]) { |
| 11417 | found_match = TRUE; |
| 11418 | break; |
| 11419 | } |
| 11420 | } |
| 11421 | if (!found_match) { |
| 11422 | // Agents don't match, ignore rule |
| 11423 | return 0; |
| 11424 | } |
| 11425 | } |
| 11426 | |
| 11427 | struct ifnet *ifp = route != NULL ? route->rt_ifp : NULL; |
| 11428 | if (ifp == NULL) { |
| 11429 | // No interface, apply the default action |
| 11430 | if (route_rule->default_action == NECP_ROUTE_RULE_USE_NETAGENT || |
| 11431 | route_rule->default_action == NECP_ROUTE_RULE_REMOVE_NETAGENT) { |
| 11432 | *remove = (route_rule->default_action == NECP_ROUTE_RULE_REMOVE_NETAGENT); |
| 11433 | return route_rule->netagent_id; |
| 11434 | } |
| 11435 | return 0; |
| 11436 | } |
| 11437 | |
| 11438 | for (int exception_index = 0; exception_index < MAX_ROUTE_RULE_INTERFACES; exception_index++) { |
| 11439 | if (route_rule->exception_if_indices[exception_index] == 0) { |
| 11440 | break; |
| 11441 | } |
| 11442 | if (route_rule->exception_if_indices[exception_index] == ifp->if_index && |
| 11443 | route_rule->exception_if_actions[exception_index] != NECP_ROUTE_RULE_NONE) { |
| 11444 | if (route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_USE_NETAGENT || |
| 11445 | route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_REMOVE_NETAGENT) { |
| 11446 | *remove = (route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_REMOVE_NETAGENT); |
| 11447 | return route_rule->netagent_id; |
| 11448 | } |
| 11449 | return 0; |
| 11450 | } |
| 11451 | } |
| 11452 | |
| 11453 | if (ifp->if_type == IFT_CELLULAR && |
| 11454 | route_rule->cellular_action != NECP_ROUTE_RULE_NONE) { |
| 11455 | if (route_rule->cellular_action == NECP_ROUTE_RULE_USE_NETAGENT || |
| 11456 | route_rule->cellular_action == NECP_ROUTE_RULE_REMOVE_NETAGENT) { |
| 11457 | *remove = (route_rule->cellular_action == NECP_ROUTE_RULE_REMOVE_NETAGENT); |
| 11458 | return route_rule->netagent_id; |
| 11459 | } |
| 11460 | return 0; |
| 11461 | } |
| 11462 | |
| 11463 | if (ifp->if_family == IFNET_FAMILY_ETHERNET && ifp->if_subfamily == IFNET_SUBFAMILY_WIFI && |
| 11464 | route_rule->wifi_action != NECP_ROUTE_RULE_NONE) { |
| 11465 | if ((route_rule->wifi_action == NECP_ROUTE_RULE_USE_NETAGENT || |
| 11466 | route_rule->wifi_action == NECP_ROUTE_RULE_REMOVE_NETAGENT)) { |
| 11467 | *remove = (route_rule->wifi_action == NECP_ROUTE_RULE_REMOVE_NETAGENT); |
| 11468 | return route_rule->netagent_id; |
| 11469 | } |
| 11470 | return 0; |
| 11471 | } |
| 11472 | |
| 11473 | if (IFNET_IS_COMPANION_LINK(ifp) && |
| 11474 | route_rule->companion_action != NECP_ROUTE_RULE_NONE) { |
| 11475 | if ((route_rule->companion_action == NECP_ROUTE_RULE_USE_NETAGENT || |
| 11476 | route_rule->companion_action == NECP_ROUTE_RULE_REMOVE_NETAGENT)) { |
| 11477 | *remove = (route_rule->companion_action == NECP_ROUTE_RULE_REMOVE_NETAGENT); |
| 11478 | return route_rule->netagent_id; |
| 11479 | } |
| 11480 | return 0; |
| 11481 | } |
| 11482 | |
| 11483 | if ((ifp->if_family == IFNET_FAMILY_ETHERNET || ifp->if_family == IFNET_FAMILY_FIREWIRE) && |
| 11484 | route_rule->wired_action != NECP_ROUTE_RULE_NONE) { |
| 11485 | if ((route_rule->wired_action == NECP_ROUTE_RULE_USE_NETAGENT || |
| 11486 | route_rule->wired_action == NECP_ROUTE_RULE_REMOVE_NETAGENT)) { |
| 11487 | *remove = (route_rule->wired_action == NECP_ROUTE_RULE_REMOVE_NETAGENT); |
| 11488 | return route_rule->netagent_id; |
| 11489 | } |
| 11490 | return 0; |
| 11491 | } |
| 11492 | |
| 11493 | if (ifp->if_eflags & IFEF_EXPENSIVE && |
| 11494 | route_rule->expensive_action != NECP_ROUTE_RULE_NONE) { |
| 11495 | if (route_rule->expensive_action == NECP_ROUTE_RULE_USE_NETAGENT || |
| 11496 | route_rule->expensive_action == NECP_ROUTE_RULE_REMOVE_NETAGENT) { |
| 11497 | *remove = (route_rule->expensive_action == NECP_ROUTE_RULE_REMOVE_NETAGENT); |
| 11498 | return route_rule->netagent_id; |
| 11499 | } |
| 11500 | return 0; |
| 11501 | } |
| 11502 | |
| 11503 | if (ifp->if_xflags & IFXF_CONSTRAINED && |
| 11504 | route_rule->constrained_action != NECP_ROUTE_RULE_NONE) { |
| 11505 | if (route_rule->constrained_action == NECP_ROUTE_RULE_USE_NETAGENT || |
| 11506 | route_rule->constrained_action == NECP_ROUTE_RULE_REMOVE_NETAGENT) { |
| 11507 | *remove = (route_rule->constrained_action == NECP_ROUTE_RULE_REMOVE_NETAGENT); |
| 11508 | return route_rule->netagent_id; |
| 11509 | } |
| 11510 | return 0; |
| 11511 | } |
| 11512 | |
| 11513 | // No more specific case matched, apply the default action |
| 11514 | if (route_rule->default_action == NECP_ROUTE_RULE_USE_NETAGENT || |
| 11515 | route_rule->default_action == NECP_ROUTE_RULE_REMOVE_NETAGENT) { |
| 11516 | *remove = (route_rule->default_action == NECP_ROUTE_RULE_REMOVE_NETAGENT); |
| 11517 | return route_rule->netagent_id; |
| 11518 | } |
| 11519 | |
| 11520 | return 0; |
| 11521 | } |
| 11522 | |
| 11523 | static uint32_t |
| 11524 | necp_route_get_flow_divert_inner(struct rtentry *route, u_int32_t *netagent_array, size_t netagent_array_count, u_int32_t route_rule_id) |
| 11525 | { |
| 11526 | struct necp_route_rule *route_rule = necp_lookup_route_rule_locked(list: &necp_route_rules, route_rule_id); |
| 11527 | if (route_rule == NULL) { |
| 11528 | return 0; |
| 11529 | } |
| 11530 | |
| 11531 | // No control unit, skip |
| 11532 | if (route_rule->control_unit == 0) { |
| 11533 | return 0; |
| 11534 | } |
| 11535 | |
| 11536 | if (route_rule->match_netagent_id != 0) { |
| 11537 | if (netagent_array == NULL || netagent_array_count == 0) { |
| 11538 | // No agents, ignore rule |
| 11539 | return 0; |
| 11540 | } |
| 11541 | bool found_match = FALSE; |
| 11542 | for (size_t agent_index = 0; agent_index < netagent_array_count; agent_index++) { |
| 11543 | if (route_rule->match_netagent_id == netagent_array[agent_index]) { |
| 11544 | found_match = TRUE; |
| 11545 | break; |
| 11546 | } |
| 11547 | } |
| 11548 | if (!found_match) { |
| 11549 | // Agents don't match, ignore rule |
| 11550 | return 0; |
| 11551 | } |
| 11552 | } |
| 11553 | |
| 11554 | struct ifnet *ifp = route != NULL ? route->rt_ifp : NULL; |
| 11555 | if (ifp == NULL) { |
| 11556 | // No interface, apply the default action |
| 11557 | if (route_rule->default_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11558 | return route_rule->control_unit; |
| 11559 | } |
| 11560 | return 0; |
| 11561 | } |
| 11562 | |
| 11563 | for (int exception_index = 0; exception_index < MAX_ROUTE_RULE_INTERFACES; exception_index++) { |
| 11564 | if (route_rule->exception_if_indices[exception_index] == 0) { |
| 11565 | break; |
| 11566 | } |
| 11567 | if (route_rule->exception_if_indices[exception_index] == ifp->if_index && |
| 11568 | route_rule->exception_if_actions[exception_index] != NECP_ROUTE_RULE_NONE) { |
| 11569 | if (route_rule->exception_if_actions[exception_index] == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11570 | return route_rule->control_unit; |
| 11571 | } |
| 11572 | return 0; |
| 11573 | } |
| 11574 | } |
| 11575 | |
| 11576 | if (ifp->if_type == IFT_CELLULAR && |
| 11577 | route_rule->cellular_action != NECP_ROUTE_RULE_NONE) { |
| 11578 | if (route_rule->cellular_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11579 | return route_rule->control_unit; |
| 11580 | } |
| 11581 | return 0; |
| 11582 | } |
| 11583 | |
| 11584 | if (ifp->if_family == IFNET_FAMILY_ETHERNET && ifp->if_subfamily == IFNET_SUBFAMILY_WIFI && |
| 11585 | route_rule->wifi_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11586 | if (route_rule->wifi_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11587 | return route_rule->control_unit; |
| 11588 | } |
| 11589 | return 0; |
| 11590 | } |
| 11591 | |
| 11592 | if (IFNET_IS_COMPANION_LINK(ifp) && |
| 11593 | route_rule->companion_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11594 | if (route_rule->companion_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11595 | return route_rule->control_unit; |
| 11596 | } |
| 11597 | return 0; |
| 11598 | } |
| 11599 | |
| 11600 | if ((ifp->if_family == IFNET_FAMILY_ETHERNET || ifp->if_family == IFNET_FAMILY_FIREWIRE) && |
| 11601 | route_rule->wired_action != NECP_ROUTE_RULE_NONE) { |
| 11602 | if (route_rule->wired_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11603 | return route_rule->control_unit; |
| 11604 | } |
| 11605 | return 0; |
| 11606 | } |
| 11607 | |
| 11608 | if (ifp->if_eflags & IFEF_EXPENSIVE && |
| 11609 | route_rule->expensive_action != NECP_ROUTE_RULE_NONE) { |
| 11610 | if (route_rule->expensive_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11611 | return route_rule->control_unit; |
| 11612 | } |
| 11613 | return 0; |
| 11614 | } |
| 11615 | |
| 11616 | if (ifp->if_xflags & IFXF_CONSTRAINED && |
| 11617 | route_rule->constrained_action != NECP_ROUTE_RULE_NONE) { |
| 11618 | if (route_rule->constrained_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11619 | return route_rule->control_unit; |
| 11620 | } |
| 11621 | return 0; |
| 11622 | } |
| 11623 | |
| 11624 | // No more specific case matched, apply the default action |
| 11625 | if (route_rule->default_action == NECP_ROUTE_RULE_DIVERT_SOCKET) { |
| 11626 | return route_rule->control_unit; |
| 11627 | } |
| 11628 | return 0; |
| 11629 | } |
| 11630 | |
| 11631 | static uint32_t |
| 11632 | necp_route_get_flow_divert(struct rtentry *route, u_int32_t *netagent_array, size_t netagent_array_count, u_int32_t route_rule_id, |
| 11633 | u_int32_t *flow_divert_aggregate_unit) |
| 11634 | { |
| 11635 | if ((route == NULL && netagent_array == NULL) || route_rule_id == 0 || flow_divert_aggregate_unit == NULL) { |
| 11636 | return 0; |
| 11637 | } |
| 11638 | |
| 11639 | if (ROUTE_RULE_IS_AGGREGATE(route_rule_id)) { |
| 11640 | struct necp_aggregate_route_rule *aggregate_route_rule = necp_lookup_aggregate_route_rule_locked(route_rule_id); |
| 11641 | if (aggregate_route_rule != NULL) { |
| 11642 | int index = 0; |
| 11643 | for (index = 0; index < MAX_AGGREGATE_ROUTE_RULES; index++) { |
| 11644 | u_int32_t sub_route_rule_id = aggregate_route_rule->rule_ids[index]; |
| 11645 | if (sub_route_rule_id == 0) { |
| 11646 | break; |
| 11647 | } |
| 11648 | uint32_t control_unit = necp_route_get_flow_divert_inner(route, netagent_array, netagent_array_count, route_rule_id: sub_route_rule_id); |
| 11649 | if (control_unit & FLOW_DIVERT_IS_TRANSPARENT) { |
| 11650 | // For transparent proxies, accumulate the control unit and continue to the next route rule |
| 11651 | *flow_divert_aggregate_unit |= (control_unit & ~FLOW_DIVERT_IS_TRANSPARENT); |
| 11652 | continue; |
| 11653 | } |
| 11654 | |
| 11655 | if (control_unit != 0) { |
| 11656 | return control_unit; |
| 11657 | } |
| 11658 | } |
| 11659 | } |
| 11660 | } else { |
| 11661 | uint32_t control_unit = necp_route_get_flow_divert_inner(route, netagent_array, netagent_array_count, route_rule_id); |
| 11662 | if (control_unit & FLOW_DIVERT_IS_TRANSPARENT) { |
| 11663 | // For transparent proxies, accumulate the control unit and let the caller continue |
| 11664 | *flow_divert_aggregate_unit |= (control_unit & ~FLOW_DIVERT_IS_TRANSPARENT); |
| 11665 | return 0; |
| 11666 | } |
| 11667 | return control_unit; |
| 11668 | } |
| 11669 | |
| 11670 | return 0; |
| 11671 | } |
| 11672 | |
| 11673 | bool |
| 11674 | necp_packet_is_allowed_over_interface(struct mbuf *packet, struct ifnet *interface) |
| 11675 | { |
| 11676 | bool is_allowed = true; |
| 11677 | u_int32_t route_rule_id = necp_get_route_rule_id_from_packet(packet); |
| 11678 | if (route_rule_id != 0 && |
| 11679 | interface != NULL) { |
| 11680 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 11681 | is_allowed = necp_route_is_allowed(NULL, interface, NULL, netagent_array_count: 0, route_rule_id: necp_get_route_rule_id_from_packet(packet), NULL); |
| 11682 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 11683 | } |
| 11684 | return is_allowed; |
| 11685 | } |
| 11686 | |
| 11687 | static bool |
| 11688 | necp_netagents_allow_traffic(u_int32_t *netagent_ids, size_t netagent_id_count) |
| 11689 | { |
| 11690 | size_t netagent_cursor; |
| 11691 | for (netagent_cursor = 0; netagent_cursor < netagent_id_count; netagent_cursor++) { |
| 11692 | struct necp_uuid_id_mapping *mapping = NULL; |
| 11693 | u_int32_t netagent_id = netagent_ids[netagent_cursor]; |
| 11694 | if (netagent_id == 0) { |
| 11695 | continue; |
| 11696 | } |
| 11697 | mapping = necp_uuid_lookup_uuid_with_service_id_locked(local_id: netagent_id); |
| 11698 | if (mapping != NULL) { |
| 11699 | u_int32_t agent_flags = 0; |
| 11700 | agent_flags = netagent_get_flags(uuid: mapping->uuid); |
| 11701 | if (agent_flags & NETAGENT_FLAG_REGISTERED) { |
| 11702 | if (agent_flags & NETAGENT_FLAG_ACTIVE) { |
| 11703 | continue; |
| 11704 | } else if ((agent_flags & NETAGENT_FLAG_VOLUNTARY) == 0) { |
| 11705 | return FALSE; |
| 11706 | } |
| 11707 | } |
| 11708 | } |
| 11709 | } |
| 11710 | return TRUE; |
| 11711 | } |
| 11712 | |
| 11713 | static bool |
| 11714 | necp_packet_filter_tags_receive(u_int16_t pf_tag, u_int32_t pass_flags) |
| 11715 | { |
| 11716 | bool allowed_to_receive = TRUE; |
| 11717 | |
| 11718 | if (pf_tag == PF_TAG_ID_STACK_DROP && |
| 11719 | (pass_flags & NECP_KERNEL_POLICY_PASS_PF_TAG) != NECP_KERNEL_POLICY_PASS_PF_TAG) { |
| 11720 | allowed_to_receive = FALSE; |
| 11721 | } |
| 11722 | |
| 11723 | return allowed_to_receive; |
| 11724 | } |
| 11725 | |
| 11726 | static bool |
| 11727 | necp_socket_is_allowed_to_send_recv_internal(struct inpcb *inp, struct sockaddr *override_local_addr, struct sockaddr *override_remote_addr, ifnet_t input_interface, u_int16_t pf_tag, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id, necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags) |
| 11728 | { |
| 11729 | u_int32_t verifyifindex = input_interface ? input_interface->if_index : 0; |
| 11730 | bool allowed_to_receive = TRUE; |
| 11731 | struct necp_socket_info info = {}; |
| 11732 | u_int32_t flowhash = 0; |
| 11733 | necp_kernel_policy_result service_action = 0; |
| 11734 | necp_kernel_policy_service service = { 0, 0 }; |
| 11735 | u_int32_t route_rule_id = 0; |
| 11736 | struct rtentry *route = NULL; |
| 11737 | u_int32_t interface_type_denied = IFRTYPE_FUNCTIONAL_UNKNOWN; |
| 11738 | necp_kernel_policy_result drop_dest_policy_result = NECP_KERNEL_POLICY_RESULT_NONE; |
| 11739 | necp_drop_all_bypass_check_result_t drop_all_bypass = NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE; |
| 11740 | u_int32_t netagent_ids[NECP_MAX_NETAGENTS]; |
| 11741 | proc_t socket_proc = NULL; |
| 11742 | necp_kernel_policy_filter filter_control_unit = 0; |
| 11743 | u_int32_t pass_flags = 0; |
| 11744 | u_int32_t flow_divert_aggregate_unit = 0; |
| 11745 | necp_socket_bypass_type_t bypass_type = NECP_BYPASS_TYPE_NONE; |
| 11746 | |
| 11747 | memset(s: &netagent_ids, c: 0, n: sizeof(netagent_ids)); |
| 11748 | |
| 11749 | if (return_policy_id) { |
| 11750 | *return_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 11751 | } |
| 11752 | if (return_skip_policy_id) { |
| 11753 | *return_skip_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 11754 | } |
| 11755 | if (return_route_rule_id) { |
| 11756 | *return_route_rule_id = 0; |
| 11757 | } |
| 11758 | if (return_pass_flags) { |
| 11759 | *return_pass_flags = 0; |
| 11760 | } |
| 11761 | |
| 11762 | if (inp == NULL) { |
| 11763 | goto done; |
| 11764 | } |
| 11765 | |
| 11766 | route = inp->inp_route.ro_rt; |
| 11767 | |
| 11768 | struct socket *so = inp->inp_socket; |
| 11769 | |
| 11770 | u_int32_t drop_order = necp_process_drop_order(so->so_cred); |
| 11771 | |
| 11772 | // Don't lock. Possible race condition, but we don't want the performance hit. |
| 11773 | if (necp_drop_management_order == 0 && |
| 11774 | (necp_kernel_socket_policies_count == 0 || |
| 11775 | (!(inp->inp_flags2 & INP2_WANT_APP_POLICY) && necp_kernel_socket_policies_non_app_count == 0))) { |
| 11776 | if (necp_drop_all_order > 0 || drop_order > 0) { |
| 11777 | if (necp_socket_bypass(override_local_addr, override_remote_addr, inp) != NECP_BYPASS_TYPE_NONE) { |
| 11778 | allowed_to_receive = TRUE; |
| 11779 | } else { |
| 11780 | allowed_to_receive = FALSE; |
| 11781 | } |
| 11782 | } |
| 11783 | goto done; |
| 11784 | } |
| 11785 | |
| 11786 | // If this socket is connected, or we are not taking addresses into account, try to reuse last result |
| 11787 | if ((necp_socket_is_connected(inp) || (override_local_addr == NULL && override_remote_addr == NULL)) && inp->inp_policyresult.policy_id != NECP_KERNEL_POLICY_ID_NONE) { |
| 11788 | bool policies_have_changed = FALSE; |
| 11789 | bool route_allowed = necp_route_is_interface_type_allowed(route, ifp: input_interface, NULL, inp); |
| 11790 | if (inp->inp_policyresult.policy_gencount != necp_kernel_socket_policies_gencount) { |
| 11791 | policies_have_changed = TRUE; |
| 11792 | } else { |
| 11793 | if (inp->inp_policyresult.results.route_rule_id != 0) { |
| 11794 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 11795 | if (!necp_route_is_allowed(route, interface: input_interface, NULL, netagent_array_count: 0, route_rule_id: inp->inp_policyresult.results.route_rule_id, interface_type_denied: &interface_type_denied)) { |
| 11796 | route_allowed = FALSE; |
| 11797 | } |
| 11798 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 11799 | } |
| 11800 | } |
| 11801 | |
| 11802 | if (!policies_have_changed) { |
| 11803 | if (!route_allowed || |
| 11804 | inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_DROP || |
| 11805 | inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT || |
| 11806 | (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && input_interface && |
| 11807 | inp->inp_policyresult.results.result_parameter.tunnel_interface_index != verifyifindex)) { |
| 11808 | allowed_to_receive = FALSE; |
| 11809 | } else { |
| 11810 | if (return_policy_id) { |
| 11811 | *return_policy_id = inp->inp_policyresult.policy_id; |
| 11812 | } |
| 11813 | if (return_skip_policy_id) { |
| 11814 | *return_skip_policy_id = inp->inp_policyresult.skip_policy_id; |
| 11815 | } |
| 11816 | if (return_route_rule_id) { |
| 11817 | *return_route_rule_id = inp->inp_policyresult.results.route_rule_id; |
| 11818 | } |
| 11819 | if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_PASS) { |
| 11820 | pass_flags = inp->inp_policyresult.results.result_parameter.pass_flags; |
| 11821 | } |
| 11822 | } |
| 11823 | goto done; |
| 11824 | } |
| 11825 | } |
| 11826 | |
| 11827 | // Check for loopback exception |
| 11828 | bypass_type = necp_socket_bypass(override_local_addr, override_remote_addr, inp); |
| 11829 | if (bypass_type == NECP_BYPASS_TYPE_INTCOPROC || (bypass_type == NECP_BYPASS_TYPE_LOOPBACK && necp_pass_loopback == NECP_LOOPBACK_PASS_ALL)) { |
| 11830 | allowed_to_receive = TRUE; |
| 11831 | goto done; |
| 11832 | } |
| 11833 | |
| 11834 | // Actually calculate policy result |
| 11835 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 11836 | necp_socket_fillout_info_locked(inp, override_local_addr, override_remote_addr, override_bound_interface: 0, override_is_inbound: input_interface != NULL ? true : false, drop_order, socket_proc: &socket_proc, info: &info, is_loopback: (bypass_type == NECP_BYPASS_TYPE_LOOPBACK)); |
| 11837 | |
| 11838 | int debug = NECP_ENABLE_DATA_TRACE((&info.local_addr), (&info.remote_addr), info.protocol, info.pid, info.bound_interface_index); |
| 11839 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - DATA PATH", "START", 0, 0); |
| 11840 | |
| 11841 | flowhash = necp_socket_calc_flowhash_locked(info: &info); |
| 11842 | if (inp->inp_policyresult.policy_id != NECP_KERNEL_POLICY_ID_NONE && |
| 11843 | inp->inp_policyresult.policy_gencount == necp_kernel_socket_policies_gencount && |
| 11844 | inp->inp_policyresult.flowhash == flowhash) { |
| 11845 | if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_DROP || |
| 11846 | inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT || |
| 11847 | (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && input_interface && |
| 11848 | inp->inp_policyresult.results.result_parameter.tunnel_interface_index != verifyifindex) || |
| 11849 | !necp_route_is_interface_type_allowed(route, ifp: input_interface, NULL, inp) || |
| 11850 | (inp->inp_policyresult.results.route_rule_id != 0 && |
| 11851 | !necp_route_is_allowed(route, interface: input_interface, NULL, netagent_array_count: 0, route_rule_id: inp->inp_policyresult.results.route_rule_id, interface_type_denied: &interface_type_denied))) { |
| 11852 | allowed_to_receive = FALSE; |
| 11853 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - DATA PATH", "RESULT - CACHED <DROP>", 0, 0); |
| 11854 | } else { |
| 11855 | if (return_policy_id) { |
| 11856 | *return_policy_id = inp->inp_policyresult.policy_id; |
| 11857 | } |
| 11858 | if (return_route_rule_id) { |
| 11859 | *return_route_rule_id = inp->inp_policyresult.results.route_rule_id; |
| 11860 | } |
| 11861 | if (return_skip_policy_id) { |
| 11862 | *return_skip_policy_id = inp->inp_policyresult.skip_policy_id; |
| 11863 | } |
| 11864 | if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_PASS) { |
| 11865 | pass_flags = inp->inp_policyresult.results.result_parameter.pass_flags; |
| 11866 | } |
| 11867 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 11868 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy - Send/Recv - RESULT - CACHED <MATCHED>: %p (BoundInterface %d Proto %d) Policy %d Skip %d Result %d Parameter %d", |
| 11869 | inp->inp_socket, info.bound_interface_index, info.protocol, |
| 11870 | inp->inp_policyresult.policy_id, |
| 11871 | inp->inp_policyresult.skip_policy_id, |
| 11872 | inp->inp_policyresult.results.result, |
| 11873 | inp->inp_policyresult.results.result_parameter.tunnel_interface_index); |
| 11874 | } |
| 11875 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - DATA PATH", "RESULT - CACHED <MATCHED>", |
| 11876 | return_policy_id ? *return_policy_id : 0, return_skip_policy_id ? *return_skip_policy_id : 0); |
| 11877 | } |
| 11878 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 11879 | goto done; |
| 11880 | } |
| 11881 | |
| 11882 | u_int32_t route_rule_id_array[MAX_AGGREGATE_ROUTE_RULES]; |
| 11883 | size_t route_rule_id_array_count = 0; |
| 11884 | struct necp_kernel_socket_policy *matched_policy = necp_socket_find_policy_match_with_info_locked(policy_search_array: necp_kernel_socket_policies_map[NECP_SOCKET_MAP_APP_ID_TO_BUCKET(info.application_id)], info: &info, return_filter: &filter_control_unit, return_route_rule_id_array: route_rule_id_array, return_route_rule_id_array_count: &route_rule_id_array_count, MAX_AGGREGATE_ROUTE_RULES, return_service_action: &service_action, return_service: &service, return_netagent_array: netagent_ids, NULL, NECP_MAX_NETAGENTS, NULL, num_required_agent_types: 0, proc: socket_proc ? socket_proc : current_proc(), pf_tag, skip_policy_id: return_skip_policy_id, rt: inp->inp_route.ro_rt, return_drop_dest_policy_result: &drop_dest_policy_result, return_drop_all_bypass: &drop_all_bypass, return_flow_divert_aggregate_unit: &flow_divert_aggregate_unit, so, debug); |
| 11885 | |
| 11886 | // Check for loopback exception again after the policy match |
| 11887 | if (bypass_type == NECP_BYPASS_TYPE_LOOPBACK && |
| 11888 | necp_pass_loopback == NECP_LOOPBACK_PASS_WITH_FILTER && |
| 11889 | (matched_policy == NULL || matched_policy->result != NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT)) { |
| 11890 | // If policies haven't changed since last evaluation, do not update filter result in order to |
| 11891 | // preserve the very first filter result for the socket. Otherwise, update the filter result to |
| 11892 | // allow content filter to detect and drop pre-existing flows. |
| 11893 | if (inp->inp_policyresult.policy_gencount != necp_kernel_socket_policies_gencount && |
| 11894 | inp->inp_policyresult.results.filter_control_unit != filter_control_unit) { |
| 11895 | inp->inp_policyresult.results.filter_control_unit = filter_control_unit; |
| 11896 | } |
| 11897 | if (inp->inp_policyresult.results.flow_divert_aggregate_unit != flow_divert_aggregate_unit) { |
| 11898 | inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 11899 | } |
| 11900 | allowed_to_receive = TRUE; |
| 11901 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 11902 | goto done; |
| 11903 | } |
| 11904 | |
| 11905 | if (info.protocol != IPPROTO_UDP) { |
| 11906 | goto skip_agent_check; |
| 11907 | } |
| 11908 | |
| 11909 | // Verify netagents |
| 11910 | if (necp_socket_verify_netagents(netagent_ids, debug, so) == false) { |
| 11911 | if (necp_debug > 1 || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 11912 | NECPLOG(LOG_ERR, "DATA-TRACE: Socket Policy: <so %llx> (BoundInterface %d Proto %d) Dropping packet because agent is not active", (unsigned long long)so, info.bound_interface_index, info.protocol); |
| 11913 | } |
| 11914 | |
| 11915 | // Mark socket as a drop if required agent is not active |
| 11916 | inp->inp_policyresult.policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 11917 | inp->inp_policyresult.skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 11918 | inp->inp_policyresult.policy_gencount = necp_kernel_socket_policies_gencount; |
| 11919 | inp->inp_policyresult.flowhash = flowhash; |
| 11920 | inp->inp_policyresult.results.filter_control_unit = 0; |
| 11921 | inp->inp_policyresult.results.flow_divert_aggregate_unit = 0; |
| 11922 | inp->inp_policyresult.results.route_rule_id = 0; |
| 11923 | inp->inp_policyresult.results.result = NECP_KERNEL_POLICY_RESULT_DROP; |
| 11924 | |
| 11925 | // Unlock |
| 11926 | allowed_to_receive = FALSE; |
| 11927 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 11928 | goto done; |
| 11929 | } |
| 11930 | |
| 11931 | skip_agent_check: |
| 11932 | |
| 11933 | if (route_rule_id_array_count == 1) { |
| 11934 | route_rule_id = route_rule_id_array[0]; |
| 11935 | } else if (route_rule_id_array_count > 1) { |
| 11936 | route_rule_id = necp_create_aggregate_route_rule(rule_ids: route_rule_id_array); |
| 11937 | } |
| 11938 | |
| 11939 | bool send_local_network_denied_event = false; |
| 11940 | if (matched_policy != NULL) { |
| 11941 | if (matched_policy->result == NECP_KERNEL_POLICY_RESULT_DROP && |
| 11942 | matched_policy->result_parameter.drop_flags & NECP_KERNEL_POLICY_DROP_FLAG_LOCAL_NETWORK && |
| 11943 | !(matched_policy->result_parameter.drop_flags & NECP_KERNEL_POLICY_DROP_FLAG_SUPPRESS_ALERTS)) { |
| 11944 | // Trigger the event that we dropped due to a local network policy |
| 11945 | send_local_network_denied_event = true; |
| 11946 | } |
| 11947 | |
| 11948 | if (matched_policy->result == NECP_KERNEL_POLICY_RESULT_DROP || |
| 11949 | matched_policy->result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT || |
| 11950 | (matched_policy->result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && input_interface && |
| 11951 | matched_policy->result_parameter.tunnel_interface_index != verifyifindex) || |
| 11952 | !necp_route_is_interface_type_allowed(route, ifp: input_interface, NULL, inp) || |
| 11953 | (route_rule_id != 0 && |
| 11954 | !necp_route_is_allowed(route, interface: input_interface, netagent_array: netagent_ids, NECP_MAX_NETAGENTS, route_rule_id, interface_type_denied: &interface_type_denied)) || |
| 11955 | !necp_netagents_allow_traffic(netagent_ids, NECP_MAX_NETAGENTS)) { |
| 11956 | allowed_to_receive = FALSE; |
| 11957 | } else { |
| 11958 | if (return_policy_id) { |
| 11959 | *return_policy_id = matched_policy->id; |
| 11960 | } |
| 11961 | if (return_route_rule_id) { |
| 11962 | *return_route_rule_id = route_rule_id; |
| 11963 | } |
| 11964 | if (matched_policy->result == NECP_KERNEL_POLICY_RESULT_PASS) { |
| 11965 | pass_flags = matched_policy->result_parameter.pass_flags; |
| 11966 | } |
| 11967 | // If policies haven't changed since last evaluation, do not update filter result in order to |
| 11968 | // preserve the very first filter result for the socket. Otherwise, update the filter result to |
| 11969 | // allow content filter to detect and drop pre-existing flows. |
| 11970 | if (inp->inp_policyresult.policy_gencount != necp_kernel_socket_policies_gencount && |
| 11971 | inp->inp_policyresult.results.filter_control_unit != filter_control_unit) { |
| 11972 | inp->inp_policyresult.results.filter_control_unit = filter_control_unit; |
| 11973 | } |
| 11974 | if (inp->inp_policyresult.results.flow_divert_aggregate_unit != flow_divert_aggregate_unit) { |
| 11975 | inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 11976 | } |
| 11977 | } |
| 11978 | |
| 11979 | if ((necp_debug > 1 && matched_policy->id != inp->inp_policyresult.policy_id) || NECP_DATA_TRACE_POLICY_ON(debug)) { |
| 11980 | NECPLOG(LOG_DEBUG, "DATA-TRACE: Socket Policy - Send/Recv: %p (BoundInterface %d Proto %d) Policy %d Result %d Parameter %d Allowed %d <filter_control_unit %d flow_divert_aggregate_unit %d>", |
| 11981 | inp->inp_socket, info.bound_interface_index, info.protocol, matched_policy->id, matched_policy->result, matched_policy->result_parameter.tunnel_interface_index, allowed_to_receive, filter_control_unit, flow_divert_aggregate_unit); |
| 11982 | } |
| 11983 | } else { |
| 11984 | bool drop_all = false; |
| 11985 | if (necp_drop_all_order > 0 || info.drop_order > 0 || drop_dest_policy_result == NECP_KERNEL_POLICY_RESULT_DROP) { |
| 11986 | drop_all = true; |
| 11987 | if (drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_NONE) { |
| 11988 | drop_all_bypass = necp_check_drop_all_bypass_result(proc: socket_proc ? socket_proc : current_proc()); |
| 11989 | } |
| 11990 | } |
| 11991 | if (drop_all && drop_all_bypass == NECP_DROP_ALL_BYPASS_CHECK_RESULT_FALSE) { |
| 11992 | allowed_to_receive = FALSE; |
| 11993 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - DATA PATH", "RESULT - DROP - NO MATCH", 0, 0); |
| 11994 | } else { |
| 11995 | if (return_policy_id) { |
| 11996 | *return_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 11997 | } |
| 11998 | if (return_route_rule_id) { |
| 11999 | *return_route_rule_id = route_rule_id; |
| 12000 | } |
| 12001 | |
| 12002 | // If policies haven't changed since last evaluation, do not update filter result in order to |
| 12003 | // preserve the very first filter result for the socket. Otherwise, update the filter result to |
| 12004 | // allow content filter to detect and drop pre-existing flows. |
| 12005 | if (inp->inp_policyresult.policy_gencount != necp_kernel_socket_policies_gencount && |
| 12006 | inp->inp_policyresult.results.filter_control_unit != filter_control_unit) { |
| 12007 | inp->inp_policyresult.results.filter_control_unit = filter_control_unit; |
| 12008 | } |
| 12009 | if (inp->inp_policyresult.results.flow_divert_aggregate_unit != flow_divert_aggregate_unit) { |
| 12010 | inp->inp_policyresult.results.flow_divert_aggregate_unit = flow_divert_aggregate_unit; |
| 12011 | } |
| 12012 | } |
| 12013 | } |
| 12014 | |
| 12015 | if (necp_check_restricted_multicast_drop(proc: socket_proc ? socket_proc : current_proc(), info: &info, true)) { |
| 12016 | allowed_to_receive = FALSE; |
| 12017 | NECP_DATA_TRACE_LOG_SOCKET(debug, so, "SOCKET - DATA PATH", "RESULT - DROP - MULTICAST", 0, 0); |
| 12018 | } |
| 12019 | |
| 12020 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 12021 | |
| 12022 | if (send_local_network_denied_event && inp->inp_policyresult.network_denied_notifies == 0) { |
| 12023 | inp->inp_policyresult.network_denied_notifies++; |
| 12024 | necp_send_network_denied_event(pid: ((so->so_flags & SOF_DELEGATED) ? so->e_pid : so->last_pid), |
| 12025 | proc_uuid: ((so->so_flags & SOF_DELEGATED) ? so->e_uuid : so->last_uuid), |
| 12026 | NETPOLICY_NETWORKTYPE_LOCAL); |
| 12027 | } |
| 12028 | |
| 12029 | done: |
| 12030 | if (return_pass_flags != NULL) { |
| 12031 | *return_pass_flags = pass_flags; |
| 12032 | } |
| 12033 | |
| 12034 | if (pf_tag != 0 && allowed_to_receive) { |
| 12035 | allowed_to_receive = necp_packet_filter_tags_receive(pf_tag, pass_flags); |
| 12036 | } |
| 12037 | |
| 12038 | if (!allowed_to_receive && interface_type_denied != IFRTYPE_FUNCTIONAL_UNKNOWN) { |
| 12039 | soevent(so: inp->inp_socket, hint: (SO_FILT_HINT_LOCKED | SO_FILT_HINT_IFDENIED)); |
| 12040 | } |
| 12041 | |
| 12042 | if (socket_proc) { |
| 12043 | proc_rele(p: socket_proc); |
| 12044 | } |
| 12045 | |
| 12046 | return allowed_to_receive; |
| 12047 | } |
| 12048 | |
| 12049 | bool |
| 12050 | necp_socket_is_allowed_to_send_recv_v4(struct inpcb *inp, u_int16_t local_port, u_int16_t remote_port, struct in_addr *local_addr, struct in_addr *remote_addr, ifnet_t input_interface, u_int16_t pf_tag, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id, necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags) |
| 12051 | { |
| 12052 | struct sockaddr_in local = {}; |
| 12053 | struct sockaddr_in remote = {}; |
| 12054 | local.sin_family = remote.sin_family = AF_INET; |
| 12055 | local.sin_len = remote.sin_len = sizeof(struct sockaddr_in); |
| 12056 | local.sin_port = local_port; |
| 12057 | remote.sin_port = remote_port; |
| 12058 | memcpy(dst: &local.sin_addr, src: local_addr, n: sizeof(local.sin_addr)); |
| 12059 | memcpy(dst: &remote.sin_addr, src: remote_addr, n: sizeof(remote.sin_addr)); |
| 12060 | |
| 12061 | return necp_socket_is_allowed_to_send_recv_internal(inp, override_local_addr: (struct sockaddr *)&local, override_remote_addr: (struct sockaddr *)&remote, input_interface, |
| 12062 | pf_tag, return_policy_id, return_route_rule_id, return_skip_policy_id, return_pass_flags); |
| 12063 | } |
| 12064 | |
| 12065 | bool |
| 12066 | necp_socket_is_allowed_to_send_recv_v6(struct inpcb *inp, u_int16_t local_port, u_int16_t remote_port, struct in6_addr *local_addr, struct in6_addr *remote_addr, ifnet_t input_interface, u_int16_t pf_tag, necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id, necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags) |
| 12067 | { |
| 12068 | struct sockaddr_in6 local = {}; |
| 12069 | struct sockaddr_in6 remote = {}; |
| 12070 | local.sin6_family = remote.sin6_family = AF_INET6; |
| 12071 | local.sin6_len = remote.sin6_len = sizeof(struct sockaddr_in6); |
| 12072 | local.sin6_port = local_port; |
| 12073 | remote.sin6_port = remote_port; |
| 12074 | memcpy(dst: &local.sin6_addr, src: local_addr, n: sizeof(local.sin6_addr)); |
| 12075 | memcpy(dst: &remote.sin6_addr, src: remote_addr, n: sizeof(remote.sin6_addr)); |
| 12076 | |
| 12077 | return necp_socket_is_allowed_to_send_recv_internal(inp, override_local_addr: (struct sockaddr *)&local, override_remote_addr: (struct sockaddr *)&remote, input_interface, |
| 12078 | pf_tag, return_policy_id, return_route_rule_id, return_skip_policy_id, return_pass_flags); |
| 12079 | } |
| 12080 | |
| 12081 | bool |
| 12082 | necp_socket_is_allowed_to_send_recv(struct inpcb *inp, ifnet_t input_interface, u_int16_t pf_tag, necp_kernel_policy_id *return_policy_id, |
| 12083 | u_int32_t *return_route_rule_id, necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags) |
| 12084 | { |
| 12085 | return necp_socket_is_allowed_to_send_recv_internal(inp, NULL, NULL, input_interface, pf_tag, |
| 12086 | return_policy_id, return_route_rule_id, |
| 12087 | return_skip_policy_id, return_pass_flags); |
| 12088 | } |
| 12089 | |
| 12090 | int |
| 12091 | necp_mark_packet_from_socket(struct mbuf *packet, struct inpcb *inp, necp_kernel_policy_id policy_id, u_int32_t route_rule_id, |
| 12092 | necp_kernel_policy_id skip_policy_id, u_int32_t pass_flags) |
| 12093 | { |
| 12094 | if (packet == NULL || inp == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12095 | return EINVAL; |
| 12096 | } |
| 12097 | |
| 12098 | // Mark ID for Pass and IP Tunnel |
| 12099 | if (policy_id != NECP_KERNEL_POLICY_ID_NONE) { |
| 12100 | packet->m_pkthdr.necp_mtag.necp_policy_id = policy_id; |
| 12101 | } else if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_PASS || |
| 12102 | inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL) { |
| 12103 | packet->m_pkthdr.necp_mtag.necp_policy_id = inp->inp_policyresult.policy_id; |
| 12104 | } else { |
| 12105 | packet->m_pkthdr.necp_mtag.necp_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 12106 | } |
| 12107 | packet->m_pkthdr.necp_mtag.necp_last_interface_index = 0; |
| 12108 | if (route_rule_id != 0) { |
| 12109 | packet->m_pkthdr.necp_mtag.necp_route_rule_id = route_rule_id; |
| 12110 | } else { |
| 12111 | packet->m_pkthdr.necp_mtag.necp_route_rule_id = inp->inp_policyresult.results.route_rule_id; |
| 12112 | } |
| 12113 | packet->m_pkthdr.necp_mtag.necp_app_id = (inp->inp_policyresult.app_id >= UINT16_MAX ? (inp->inp_policyresult.app_id - UINT16_MAX) : inp->inp_policyresult.app_id); |
| 12114 | |
| 12115 | if (skip_policy_id != NECP_KERNEL_POLICY_ID_NONE && |
| 12116 | skip_policy_id != NECP_KERNEL_POLICY_ID_NO_MATCH) { |
| 12117 | // Only mark the skip policy if it is a valid policy ID |
| 12118 | packet->m_pkthdr.necp_mtag.necp_skip_policy_id = skip_policy_id; |
| 12119 | } else if (inp->inp_policyresult.results.filter_control_unit == NECP_FILTER_UNIT_NO_FILTER) { |
| 12120 | // Overload the meaning of "NECP_KERNEL_POLICY_ID_NO_MATCH" |
| 12121 | // to indicate that NECP_FILTER_UNIT_NO_FILTER was set |
| 12122 | // See necp_get_skip_policy_id_from_packet() and |
| 12123 | // necp_packet_should_skip_filters(). |
| 12124 | packet->m_pkthdr.necp_mtag.necp_skip_policy_id = NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 12125 | } else { |
| 12126 | packet->m_pkthdr.necp_mtag.necp_skip_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 12127 | } |
| 12128 | |
| 12129 | if (((pass_flags & NECP_KERNEL_POLICY_PASS_PF_TAG) == NECP_KERNEL_POLICY_PASS_PF_TAG) || |
| 12130 | ((inp->inp_policyresult.results.result_parameter.pass_flags & NECP_KERNEL_POLICY_PASS_PF_TAG) == NECP_KERNEL_POLICY_PASS_PF_TAG)) { |
| 12131 | m_pftag(packet)->pftag_tag = PF_TAG_ID_SYSTEM_SERVICE; |
| 12132 | } |
| 12133 | |
| 12134 | return 0; |
| 12135 | } |
| 12136 | |
| 12137 | int |
| 12138 | necp_mark_packet_from_ip(struct mbuf *packet, necp_kernel_policy_id policy_id) |
| 12139 | { |
| 12140 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12141 | return EINVAL; |
| 12142 | } |
| 12143 | |
| 12144 | // Mark ID for Pass and IP Tunnel |
| 12145 | if (policy_id != NECP_KERNEL_POLICY_ID_NONE) { |
| 12146 | packet->m_pkthdr.necp_mtag.necp_policy_id = policy_id; |
| 12147 | } else { |
| 12148 | packet->m_pkthdr.necp_mtag.necp_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 12149 | } |
| 12150 | |
| 12151 | return 0; |
| 12152 | } |
| 12153 | |
| 12154 | int |
| 12155 | necp_mark_packet_from_ip_with_skip(struct mbuf *packet, necp_kernel_policy_id policy_id, necp_kernel_policy_id skip_policy_id) |
| 12156 | { |
| 12157 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12158 | return EINVAL; |
| 12159 | } |
| 12160 | |
| 12161 | // Mark ID for Pass and IP Tunnel |
| 12162 | if (policy_id != NECP_KERNEL_POLICY_ID_NONE) { |
| 12163 | packet->m_pkthdr.necp_mtag.necp_policy_id = policy_id; |
| 12164 | } else { |
| 12165 | packet->m_pkthdr.necp_mtag.necp_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 12166 | } |
| 12167 | |
| 12168 | if (skip_policy_id != NECP_KERNEL_POLICY_ID_NONE) { |
| 12169 | packet->m_pkthdr.necp_mtag.necp_skip_policy_id = skip_policy_id; |
| 12170 | } else { |
| 12171 | packet->m_pkthdr.necp_mtag.necp_skip_policy_id = NECP_KERNEL_POLICY_ID_NONE; |
| 12172 | } |
| 12173 | return 0; |
| 12174 | } |
| 12175 | |
| 12176 | int |
| 12177 | necp_mark_packet_from_interface(struct mbuf *packet, ifnet_t interface) |
| 12178 | { |
| 12179 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12180 | return EINVAL; |
| 12181 | } |
| 12182 | |
| 12183 | // Mark ID for Pass and IP Tunnel |
| 12184 | if (interface != NULL) { |
| 12185 | packet->m_pkthdr.necp_mtag.necp_last_interface_index = interface->if_index; |
| 12186 | } |
| 12187 | |
| 12188 | return 0; |
| 12189 | } |
| 12190 | |
| 12191 | int |
| 12192 | necp_mark_packet_as_keepalive(struct mbuf *packet, bool is_keepalive) |
| 12193 | { |
| 12194 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12195 | return EINVAL; |
| 12196 | } |
| 12197 | |
| 12198 | if (is_keepalive) { |
| 12199 | packet->m_pkthdr.pkt_flags |= PKTF_KEEPALIVE; |
| 12200 | } else { |
| 12201 | packet->m_pkthdr.pkt_flags &= ~PKTF_KEEPALIVE; |
| 12202 | } |
| 12203 | |
| 12204 | return 0; |
| 12205 | } |
| 12206 | |
| 12207 | necp_kernel_policy_id |
| 12208 | necp_get_policy_id_from_packet(struct mbuf *packet) |
| 12209 | { |
| 12210 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12211 | return NECP_KERNEL_POLICY_ID_NONE; |
| 12212 | } |
| 12213 | |
| 12214 | return packet->m_pkthdr.necp_mtag.necp_policy_id; |
| 12215 | } |
| 12216 | |
| 12217 | necp_kernel_policy_id |
| 12218 | necp_get_skip_policy_id_from_packet(struct mbuf *packet) |
| 12219 | { |
| 12220 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12221 | return NECP_KERNEL_POLICY_ID_NONE; |
| 12222 | } |
| 12223 | |
| 12224 | // Check for overloaded value. See necp_mark_packet_from_socket(). |
| 12225 | if (packet->m_pkthdr.necp_mtag.necp_skip_policy_id == NECP_KERNEL_POLICY_ID_NO_MATCH) { |
| 12226 | return NECP_KERNEL_POLICY_ID_NONE; |
| 12227 | } |
| 12228 | |
| 12229 | return packet->m_pkthdr.necp_mtag.necp_skip_policy_id; |
| 12230 | } |
| 12231 | |
| 12232 | u_int16_t |
| 12233 | necp_get_packet_filter_tags_from_packet(struct mbuf *packet) |
| 12234 | { |
| 12235 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12236 | return 0; |
| 12237 | } |
| 12238 | |
| 12239 | return m_pftag(packet)->pftag_tag; |
| 12240 | } |
| 12241 | |
| 12242 | bool |
| 12243 | necp_packet_should_skip_filters(struct mbuf *packet) |
| 12244 | { |
| 12245 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12246 | return false; |
| 12247 | } |
| 12248 | |
| 12249 | // Check for overloaded value. See necp_mark_packet_from_socket(). |
| 12250 | return packet->m_pkthdr.necp_mtag.necp_skip_policy_id == NECP_KERNEL_POLICY_ID_NO_MATCH; |
| 12251 | } |
| 12252 | |
| 12253 | u_int32_t |
| 12254 | necp_get_last_interface_index_from_packet(struct mbuf *packet) |
| 12255 | { |
| 12256 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12257 | return 0; |
| 12258 | } |
| 12259 | |
| 12260 | return packet->m_pkthdr.necp_mtag.necp_last_interface_index; |
| 12261 | } |
| 12262 | |
| 12263 | u_int32_t |
| 12264 | necp_get_route_rule_id_from_packet(struct mbuf *packet) |
| 12265 | { |
| 12266 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12267 | return 0; |
| 12268 | } |
| 12269 | |
| 12270 | return packet->m_pkthdr.necp_mtag.necp_route_rule_id; |
| 12271 | } |
| 12272 | |
| 12273 | int |
| 12274 | necp_get_app_uuid_from_packet(struct mbuf *packet, |
| 12275 | uuid_t app_uuid) |
| 12276 | { |
| 12277 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12278 | return EINVAL; |
| 12279 | } |
| 12280 | |
| 12281 | bool found_mapping = FALSE; |
| 12282 | if (packet->m_pkthdr.necp_mtag.necp_app_id != 0) { |
| 12283 | lck_rw_lock_shared(lck: &necp_kernel_policy_lock); |
| 12284 | necp_app_id app_id = (packet->m_pkthdr.necp_mtag.necp_app_id < UINT16_MAX ? (packet->m_pkthdr.necp_mtag.necp_app_id + UINT16_MAX) : packet->m_pkthdr.necp_mtag.necp_app_id); |
| 12285 | struct necp_uuid_id_mapping *entry = necp_uuid_lookup_uuid_with_app_id_locked(local_id: app_id); |
| 12286 | if (entry != NULL) { |
| 12287 | uuid_copy(dst: app_uuid, src: entry->uuid); |
| 12288 | found_mapping = true; |
| 12289 | } |
| 12290 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 12291 | } |
| 12292 | if (!found_mapping) { |
| 12293 | uuid_clear(uu: app_uuid); |
| 12294 | } |
| 12295 | return 0; |
| 12296 | } |
| 12297 | |
| 12298 | bool |
| 12299 | necp_get_is_keepalive_from_packet(struct mbuf *packet) |
| 12300 | { |
| 12301 | if (packet == NULL || !(packet->m_flags & M_PKTHDR)) { |
| 12302 | return FALSE; |
| 12303 | } |
| 12304 | |
| 12305 | return packet->m_pkthdr.pkt_flags & PKTF_KEEPALIVE; |
| 12306 | } |
| 12307 | |
| 12308 | u_int32_t |
| 12309 | necp_socket_get_content_filter_control_unit(struct socket *so) |
| 12310 | { |
| 12311 | struct inpcb *inp = sotoinpcb(so); |
| 12312 | |
| 12313 | if (inp == NULL) { |
| 12314 | return 0; |
| 12315 | } |
| 12316 | return inp->inp_policyresult.results.filter_control_unit; |
| 12317 | } |
| 12318 | |
| 12319 | bool |
| 12320 | necp_socket_should_use_flow_divert(struct inpcb *inp) |
| 12321 | { |
| 12322 | if (inp == NULL) { |
| 12323 | return FALSE; |
| 12324 | } |
| 12325 | |
| 12326 | return !(inp->inp_socket->so_flags1 & SOF1_FLOW_DIVERT_SKIP) && |
| 12327 | (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT || |
| 12328 | (inp->inp_policyresult.results.flow_divert_aggregate_unit != 0)); |
| 12329 | } |
| 12330 | |
| 12331 | u_int32_t |
| 12332 | necp_socket_get_flow_divert_control_unit(struct inpcb *inp, uint32_t *aggregate_unit) |
| 12333 | { |
| 12334 | if (inp == NULL) { |
| 12335 | return 0; |
| 12336 | } |
| 12337 | |
| 12338 | if (inp->inp_socket->so_flags1 & SOF1_FLOW_DIVERT_SKIP) { |
| 12339 | return 0; |
| 12340 | } |
| 12341 | |
| 12342 | if (aggregate_unit != NULL && |
| 12343 | inp->inp_policyresult.results.flow_divert_aggregate_unit != 0) { |
| 12344 | *aggregate_unit = inp->inp_policyresult.results.flow_divert_aggregate_unit; |
| 12345 | } |
| 12346 | |
| 12347 | if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT) { |
| 12348 | return inp->inp_policyresult.results.result_parameter.flow_divert_control_unit; |
| 12349 | } |
| 12350 | |
| 12351 | return 0; |
| 12352 | } |
| 12353 | |
| 12354 | bool |
| 12355 | necp_socket_should_rescope(struct inpcb *inp) |
| 12356 | { |
| 12357 | if (inp == NULL) { |
| 12358 | return FALSE; |
| 12359 | } |
| 12360 | |
| 12361 | return inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED || |
| 12362 | inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT; |
| 12363 | } |
| 12364 | |
| 12365 | u_int |
| 12366 | necp_socket_get_rescope_if_index(struct inpcb *inp) |
| 12367 | { |
| 12368 | if (inp == NULL) { |
| 12369 | return 0; |
| 12370 | } |
| 12371 | |
| 12372 | if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED) { |
| 12373 | return inp->inp_policyresult.results.result_parameter.scoped_interface_index; |
| 12374 | } else if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT) { |
| 12375 | return necp_get_primary_direct_interface_index(); |
| 12376 | } |
| 12377 | |
| 12378 | return 0; |
| 12379 | } |
| 12380 | |
| 12381 | u_int32_t |
| 12382 | necp_socket_get_effective_mtu(struct inpcb *inp, u_int32_t current_mtu) |
| 12383 | { |
| 12384 | if (inp == NULL) { |
| 12385 | return current_mtu; |
| 12386 | } |
| 12387 | |
| 12388 | if (inp->inp_policyresult.results.result == NECP_KERNEL_POLICY_RESULT_IP_TUNNEL && |
| 12389 | (inp->inp_flags & INP_BOUND_IF) && |
| 12390 | inp->inp_boundifp) { |
| 12391 | u_int bound_interface_index = inp->inp_boundifp->if_index; |
| 12392 | u_int tunnel_interface_index = inp->inp_policyresult.results.result_parameter.tunnel_interface_index; |
| 12393 | |
| 12394 | // The result is IP Tunnel, and is rescoping from one interface to another. Recalculate MTU. |
| 12395 | if (bound_interface_index != tunnel_interface_index) { |
| 12396 | ifnet_t tunnel_interface = NULL; |
| 12397 | |
| 12398 | ifnet_head_lock_shared(); |
| 12399 | tunnel_interface = ifindex2ifnet[tunnel_interface_index]; |
| 12400 | ifnet_head_done(); |
| 12401 | |
| 12402 | if (tunnel_interface != NULL) { |
| 12403 | u_int32_t direct_tunnel_mtu = tunnel_interface->if_mtu; |
| 12404 | u_int32_t delegate_tunnel_mtu = (tunnel_interface->if_delegated.ifp != NULL) ? tunnel_interface->if_delegated.ifp->if_mtu : 0; |
| 12405 | if (delegate_tunnel_mtu != 0 && |
| 12406 | strncmp(s1: tunnel_interface->if_name, s2: "ipsec", n: strlen(s: "ipsec")) == 0) { |
| 12407 | // For ipsec interfaces, calculate the overhead from the delegate interface |
| 12408 | u_int32_t tunnel_overhead = (u_int32_t)(esp_hdrsiz(NULL) + sizeof(struct ip6_hdr)); |
| 12409 | if (delegate_tunnel_mtu > tunnel_overhead) { |
| 12410 | delegate_tunnel_mtu -= tunnel_overhead; |
| 12411 | } |
| 12412 | |
| 12413 | if (delegate_tunnel_mtu < direct_tunnel_mtu) { |
| 12414 | // If the (delegate - overhead) < direct, return (delegate - overhead) |
| 12415 | return delegate_tunnel_mtu; |
| 12416 | } else { |
| 12417 | // Otherwise return direct |
| 12418 | return direct_tunnel_mtu; |
| 12419 | } |
| 12420 | } else { |
| 12421 | // For non-ipsec interfaces, just return the tunnel MTU |
| 12422 | return direct_tunnel_mtu; |
| 12423 | } |
| 12424 | } |
| 12425 | } |
| 12426 | } |
| 12427 | |
| 12428 | // By default, just return the MTU passed in |
| 12429 | return current_mtu; |
| 12430 | } |
| 12431 | |
| 12432 | ifnet_t |
| 12433 | necp_get_ifnet_from_result_parameter(necp_kernel_policy_result_parameter *result_parameter) |
| 12434 | { |
| 12435 | if (result_parameter == NULL) { |
| 12436 | return NULL; |
| 12437 | } |
| 12438 | |
| 12439 | return ifindex2ifnet[result_parameter->tunnel_interface_index]; |
| 12440 | } |
| 12441 | |
| 12442 | bool |
| 12443 | necp_packet_can_rebind_to_ifnet(struct mbuf *packet, struct ifnet *interface, struct route *new_route, int family) |
| 12444 | { |
| 12445 | bool found_match = FALSE; |
| 12446 | bool can_rebind = FALSE; |
| 12447 | ifaddr_t ifa; |
| 12448 | union necp_sockaddr_union address_storage; |
| 12449 | |
| 12450 | if (packet == NULL || interface == NULL || new_route == NULL || (family != AF_INET && family != AF_INET6)) { |
| 12451 | return FALSE; |
| 12452 | } |
| 12453 | |
| 12454 | // Match source address against interface addresses |
| 12455 | ifnet_lock_shared(ifp: interface); |
| 12456 | TAILQ_FOREACH(ifa, &interface->if_addrhead, ifa_link) { |
| 12457 | if (ifaddr_address(ifaddr: ifa, SA(&address_storage.sa), addr_size: sizeof(address_storage)) == 0) { |
| 12458 | if (address_storage.sa.sa_family != family) { |
| 12459 | continue; |
| 12460 | } |
| 12461 | |
| 12462 | if (family == AF_INET) { |
| 12463 | struct ip *ip = mtod(packet, struct ip *); |
| 12464 | if (memcmp(s1: &address_storage.sin.sin_addr, s2: &ip->ip_src, n: sizeof(ip->ip_src)) == 0) { |
| 12465 | found_match = TRUE; |
| 12466 | break; |
| 12467 | } |
| 12468 | } else if (family == AF_INET6) { |
| 12469 | struct ip6_hdr *ip6 = mtod(packet, struct ip6_hdr *); |
| 12470 | if (memcmp(s1: &address_storage.sin6.sin6_addr, s2: &ip6->ip6_src, n: sizeof(ip6->ip6_src)) == 0) { |
| 12471 | found_match = TRUE; |
| 12472 | break; |
| 12473 | } |
| 12474 | } |
| 12475 | } |
| 12476 | } |
| 12477 | const uint32_t if_idx = interface->if_index; |
| 12478 | ifnet_lock_done(ifp: interface); |
| 12479 | |
| 12480 | // If source address matched, attempt to construct a route to the destination address |
| 12481 | if (found_match) { |
| 12482 | ROUTE_RELEASE(new_route); |
| 12483 | |
| 12484 | if (family == AF_INET) { |
| 12485 | struct ip *ip = mtod(packet, struct ip *); |
| 12486 | struct sockaddr_in *dst4 = (struct sockaddr_in *)(void *)&new_route->ro_dst; |
| 12487 | dst4->sin_family = AF_INET; |
| 12488 | dst4->sin_len = sizeof(struct sockaddr_in); |
| 12489 | dst4->sin_addr = ip->ip_dst; |
| 12490 | rtalloc_scoped(new_route, if_idx); |
| 12491 | if (!ROUTE_UNUSABLE(new_route)) { |
| 12492 | can_rebind = TRUE; |
| 12493 | } |
| 12494 | } else if (family == AF_INET6) { |
| 12495 | struct ip6_hdr *ip6 = mtod(packet, struct ip6_hdr *); |
| 12496 | struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)(void *)&new_route->ro_dst; |
| 12497 | dst6->sin6_family = AF_INET6; |
| 12498 | dst6->sin6_len = sizeof(struct sockaddr_in6); |
| 12499 | dst6->sin6_addr = ip6->ip6_dst; |
| 12500 | rtalloc_scoped(new_route, if_idx); |
| 12501 | if (!ROUTE_UNUSABLE(new_route)) { |
| 12502 | can_rebind = TRUE; |
| 12503 | } |
| 12504 | } |
| 12505 | } |
| 12506 | |
| 12507 | return can_rebind; |
| 12508 | } |
| 12509 | |
| 12510 | static bool |
| 12511 | necp_addr_is_loopback(struct sockaddr *address) |
| 12512 | { |
| 12513 | if (address == NULL) { |
| 12514 | return FALSE; |
| 12515 | } |
| 12516 | |
| 12517 | if (address->sa_family == AF_INET) { |
| 12518 | return ntohl(((struct sockaddr_in *)(void *)address)->sin_addr.s_addr) == INADDR_LOOPBACK; |
| 12519 | } else if (address->sa_family == AF_INET6) { |
| 12520 | if (!IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)(void *)address)->sin6_addr)) { |
| 12521 | return IN6_IS_ADDR_LOOPBACK(&((struct sockaddr_in6 *)(void *)address)->sin6_addr); |
| 12522 | } else { |
| 12523 | // Match ::ffff:127.0.0.1 loopback address |
| 12524 | in6_addr_t *in6_addr_ptr = &(((struct sockaddr_in6 *)(void *)address)->sin6_addr); |
| 12525 | return *(const __uint32_t *)(const void *)(&in6_addr_ptr->s6_addr[12]) == ntohl(INADDR_LOOPBACK); |
| 12526 | } |
| 12527 | } |
| 12528 | |
| 12529 | return FALSE; |
| 12530 | } |
| 12531 | |
| 12532 | static bool |
| 12533 | necp_is_loopback(struct sockaddr *local_addr, struct sockaddr *remote_addr, struct inpcb *inp, struct mbuf *packet, u_int32_t bound_interface_index) |
| 12534 | { |
| 12535 | // Note: This function only checks for the loopback addresses. |
| 12536 | // In the future, we may want to expand to also allow any traffic |
| 12537 | // going through the loopback interface, but until then, this |
| 12538 | // check is cheaper. |
| 12539 | |
| 12540 | if (local_addr != NULL && necp_addr_is_loopback(address: local_addr)) { |
| 12541 | return TRUE; |
| 12542 | } |
| 12543 | |
| 12544 | if (remote_addr != NULL && necp_addr_is_loopback(address: remote_addr)) { |
| 12545 | return TRUE; |
| 12546 | } |
| 12547 | |
| 12548 | if (inp != NULL) { |
| 12549 | if ((inp->inp_flags & INP_BOUND_IF) && inp->inp_boundifp && (inp->inp_boundifp->if_flags & IFF_LOOPBACK)) { |
| 12550 | return TRUE; |
| 12551 | } |
| 12552 | if (inp->inp_vflag & INP_IPV4) { |
| 12553 | if (ntohl(inp->inp_laddr.s_addr) == INADDR_LOOPBACK || |
| 12554 | ntohl(inp->inp_faddr.s_addr) == INADDR_LOOPBACK) { |
| 12555 | return TRUE; |
| 12556 | } |
| 12557 | } else if (inp->inp_vflag & INP_IPV6) { |
| 12558 | if (IN6_IS_ADDR_LOOPBACK(&inp->in6p_laddr) || |
| 12559 | IN6_IS_ADDR_LOOPBACK(&inp->in6p_faddr)) { |
| 12560 | return TRUE; |
| 12561 | } |
| 12562 | } |
| 12563 | } else if (bound_interface_index != IFSCOPE_NONE && lo_ifp->if_index == bound_interface_index) { |
| 12564 | return TRUE; |
| 12565 | } |
| 12566 | |
| 12567 | if (packet != NULL) { |
| 12568 | struct ip *ip = mtod(packet, struct ip *); |
| 12569 | if (ip->ip_v == 4) { |
| 12570 | if (ntohl(ip->ip_src.s_addr) == INADDR_LOOPBACK) { |
| 12571 | return TRUE; |
| 12572 | } |
| 12573 | if (ntohl(ip->ip_dst.s_addr) == INADDR_LOOPBACK) { |
| 12574 | return TRUE; |
| 12575 | } |
| 12576 | } else if (ip->ip_v == 6) { |
| 12577 | struct ip6_hdr *ip6 = mtod(packet, struct ip6_hdr *); |
| 12578 | if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src)) { |
| 12579 | return TRUE; |
| 12580 | } |
| 12581 | if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) { |
| 12582 | return TRUE; |
| 12583 | } |
| 12584 | } |
| 12585 | } |
| 12586 | |
| 12587 | return FALSE; |
| 12588 | } |
| 12589 | |
| 12590 | static bool |
| 12591 | necp_is_intcoproc(struct inpcb *inp, struct mbuf *packet) |
| 12592 | { |
| 12593 | if (inp != NULL) { |
| 12594 | if (!(inp->inp_vflag & INP_IPV6)) { |
| 12595 | return false; |
| 12596 | } |
| 12597 | if (INP_INTCOPROC_ALLOWED(inp)) { |
| 12598 | return true; |
| 12599 | } |
| 12600 | if ((inp->inp_flags & INP_BOUND_IF) && |
| 12601 | IFNET_IS_INTCOPROC(inp->inp_boundifp)) { |
| 12602 | return true; |
| 12603 | } |
| 12604 | return false; |
| 12605 | } |
| 12606 | if (packet != NULL) { |
| 12607 | struct ip6_hdr *ip6 = mtod(packet, struct ip6_hdr *); |
| 12608 | struct in6_addr *addrv6 = &ip6->ip6_dst; |
| 12609 | if ((ip6->ip6_vfc & IPV6_VERSION_MASK) == IPV6_VERSION && |
| 12610 | NECP_IS_INTCOPROC_ADDRESS(addrv6)) { |
| 12611 | return true; |
| 12612 | } |
| 12613 | } |
| 12614 | |
| 12615 | return false; |
| 12616 | } |
| 12617 | |
| 12618 | static bool |
| 12619 | necp_address_matches_drop_dest_policy(union necp_sockaddr_union *sau, u_int32_t session_order) |
| 12620 | { |
| 12621 | char dest_str[MAX_IPv6_STR_LEN]; |
| 12622 | |
| 12623 | if (necp_drop_dest_debug > 0) { |
| 12624 | if (sau->sa.sa_family == AF_INET) { |
| 12625 | (void) inet_ntop(AF_INET, &sau->sin.sin_addr, dest_str, sizeof(dest_str)); |
| 12626 | } else if (sau->sa.sa_family == AF_INET6) { |
| 12627 | (void) inet_ntop(AF_INET6, &sau->sin6.sin6_addr, dest_str, sizeof(dest_str)); |
| 12628 | } else { |
| 12629 | dest_str[0] = 0; |
| 12630 | } |
| 12631 | } |
| 12632 | for (u_int32_t i = 0; i < necp_drop_dest_policy.entry_count; i++) { |
| 12633 | struct necp_drop_dest_entry *necp_drop_dest_entry = &necp_drop_dest_policy.entries[i]; |
| 12634 | struct necp_policy_condition_addr *npca = &necp_drop_dest_entry->cond_addr; |
| 12635 | |
| 12636 | if (session_order >= necp_drop_dest_entry->order && necp_is_addr_in_subnet(SA(&sau->sa), SA(&npca->address.sa), subnet_prefix: npca->prefix)) { |
| 12637 | if (necp_drop_dest_debug > 0) { |
| 12638 | char subnet_str[MAX_IPv6_STR_LEN]; |
| 12639 | struct proc *p = current_proc(); |
| 12640 | pid_t pid = proc_pid(p); |
| 12641 | |
| 12642 | if (sau->sa.sa_family == AF_INET) { |
| 12643 | (void) inet_ntop(AF_INET, &npca->address.sin, subnet_str, sizeof(subnet_str)); |
| 12644 | os_log(OS_LOG_DEFAULT, "%s (process %s:%u) %s matches %s/%u", __func__, proc_best_name(p), pid, dest_str, subnet_str, npca->prefix); |
| 12645 | } else if (sau->sa.sa_family == AF_INET6) { |
| 12646 | (void) inet_ntop(AF_INET6, &npca->address.sin6, subnet_str, sizeof(subnet_str)); |
| 12647 | os_log(OS_LOG_DEFAULT, "%s (process %s:%u) %s matches %s/%u", __func__, proc_best_name(p), pid, dest_str, subnet_str, npca->prefix); |
| 12648 | } |
| 12649 | } |
| 12650 | return true; |
| 12651 | } |
| 12652 | } |
| 12653 | if (necp_drop_dest_debug > 1) { |
| 12654 | struct proc *p = current_proc(); |
| 12655 | pid_t pid = proc_pid(p); |
| 12656 | |
| 12657 | os_log(OS_LOG_DEFAULT, "%s (process %s:%u) %s no match", __func__, proc_best_name(p), pid, dest_str); |
| 12658 | } |
| 12659 | return false; |
| 12660 | } |
| 12661 | |
| 12662 | static int |
| 12663 | sysctl_handle_necp_drop_dest_level SYSCTL_HANDLER_ARGS |
| 12664 | { |
| 12665 | #pragma unused(arg1, arg2, oidp) |
| 12666 | int changed = 0; |
| 12667 | int error = 0; |
| 12668 | struct necp_drop_dest_policy tmp_drop_dest_policy; |
| 12669 | struct proc *p = current_proc(); |
| 12670 | pid_t pid = proc_pid(p); |
| 12671 | |
| 12672 | if (req->newptr != USER_ADDR_NULL && proc_suser(p: current_proc()) != 0 && |
| 12673 | priv_check_cred(cred: kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, flags: 0) != 0) { |
| 12674 | NECPLOG(LOG_ERR, "%s (process %s:%u) not permitted", __func__, proc_best_name(p), pid); |
| 12675 | return EPERM; |
| 12676 | } |
| 12677 | if (req->newptr != USER_ADDR_NULL && req->newlen != sizeof(struct necp_drop_dest_policy)) { |
| 12678 | NECPLOG(LOG_ERR, "%s (process %s:%u) bad newlen %lu", __func__, proc_best_name(p), pid, req->newlen); |
| 12679 | return EINVAL; |
| 12680 | } |
| 12681 | |
| 12682 | memcpy(dst: &tmp_drop_dest_policy, src: &necp_drop_dest_policy, n: sizeof(struct necp_drop_dest_policy)); |
| 12683 | error = sysctl_io_opaque(req, pValue: &tmp_drop_dest_policy, valueSize: sizeof(struct necp_drop_dest_policy), changed: &changed); |
| 12684 | if (error != 0) { |
| 12685 | NECPLOG(LOG_ERR, "%s (process %s:%u) sysctl_io_opaque() error %d", __func__, proc_best_name(p), pid, error); |
| 12686 | return error; |
| 12687 | } |
| 12688 | if (changed == 0 || req->newptr == USER_ADDR_NULL) { |
| 12689 | return error; |
| 12690 | } |
| 12691 | |
| 12692 | // |
| 12693 | // Validate the passed parameters |
| 12694 | // |
| 12695 | if (tmp_drop_dest_policy.entry_count >= MAX_NECP_DROP_DEST_LEVEL_ADDRS) { |
| 12696 | NECPLOG(LOG_ERR, "%s (process %s:%u) bad entry_count %u", __func__, proc_best_name(p), pid, tmp_drop_dest_policy.entry_count); |
| 12697 | return EINVAL; |
| 12698 | } |
| 12699 | for (u_int32_t i = 0; i < tmp_drop_dest_policy.entry_count; i++) { |
| 12700 | struct necp_drop_dest_entry *tmp_drop_dest_entry = &tmp_drop_dest_policy.entries[i]; |
| 12701 | struct necp_policy_condition_addr *npca = &tmp_drop_dest_entry->cond_addr; |
| 12702 | |
| 12703 | switch (tmp_drop_dest_entry->level) { |
| 12704 | case NECP_SESSION_PRIORITY_UNKNOWN: |
| 12705 | if (tmp_drop_dest_policy.entry_count != 0) { |
| 12706 | NECPLOG(LOG_ERR, "%s (process %s:%u) NECP_SESSION_PRIORITY_UNKNOWN bad entry_count %u", __func__, proc_best_name(p), pid, tmp_drop_dest_policy.entry_count); |
| 12707 | return EINVAL; |
| 12708 | } |
| 12709 | break; |
| 12710 | case NECP_SESSION_PRIORITY_CONTROL: |
| 12711 | case NECP_SESSION_PRIORITY_CONTROL_1: |
| 12712 | case NECP_SESSION_PRIORITY_PRIVILEGED_TUNNEL: |
| 12713 | case NECP_SESSION_PRIORITY_HIGH: |
| 12714 | case NECP_SESSION_PRIORITY_HIGH_1: |
| 12715 | case NECP_SESSION_PRIORITY_HIGH_2: |
| 12716 | case NECP_SESSION_PRIORITY_HIGH_3: |
| 12717 | case NECP_SESSION_PRIORITY_HIGH_4: |
| 12718 | case NECP_SESSION_PRIORITY_HIGH_RESTRICTED: |
| 12719 | case NECP_SESSION_PRIORITY_DEFAULT: |
| 12720 | case NECP_SESSION_PRIORITY_LOW: |
| 12721 | if (tmp_drop_dest_policy.entry_count == 0) { |
| 12722 | NECPLOG(LOG_ERR, "%s (process %s:%u) priority %u entry_count 0", __func__, proc_best_name(p), pid, tmp_drop_dest_entry->level); |
| 12723 | return EINVAL; |
| 12724 | } |
| 12725 | break; |
| 12726 | default: { |
| 12727 | NECPLOG(LOG_ERR, "%s (process %s:%u) bad level %u", __func__, proc_best_name(p), pid, tmp_drop_dest_entry->level); |
| 12728 | return EINVAL; |
| 12729 | } |
| 12730 | } |
| 12731 | |
| 12732 | switch (npca->address.sa.sa_family) { |
| 12733 | case AF_INET: { |
| 12734 | if (npca->prefix > 32) { |
| 12735 | NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET bad prefix %u", __func__, proc_best_name(p), pid, npca->prefix); |
| 12736 | return EINVAL; |
| 12737 | } |
| 12738 | if (npca->address.sin.sin_len != sizeof(struct sockaddr_in)) { |
| 12739 | NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET bad sin_len %u", __func__, proc_best_name(p), pid, npca->address.sin.sin_len); |
| 12740 | return EINVAL; |
| 12741 | } |
| 12742 | if (npca->address.sin.sin_port != 0) { |
| 12743 | NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET bad sin_port %u, not zero", __func__, proc_best_name(p), pid, npca->address.sin.sin_port); |
| 12744 | return EINVAL; |
| 12745 | } |
| 12746 | break; |
| 12747 | } |
| 12748 | case AF_INET6: { |
| 12749 | if (npca->prefix > 128) { |
| 12750 | NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad prefix %u", __func__, proc_best_name(p), pid, npca->prefix); |
| 12751 | return EINVAL; |
| 12752 | } |
| 12753 | if (npca->address.sin6.sin6_len != sizeof(struct sockaddr_in6)) { |
| 12754 | NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad sin6_len %u", __func__, proc_best_name(p), pid, npca->address.sin6.sin6_len); |
| 12755 | return EINVAL; |
| 12756 | } |
| 12757 | if (npca->address.sin6.sin6_port != 0) { |
| 12758 | NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad sin6_port %u, not zero", __func__, proc_best_name(p), pid, npca->address.sin6.sin6_port); |
| 12759 | return EINVAL; |
| 12760 | } |
| 12761 | if (npca->address.sin6.sin6_flowinfo != 0) { |
| 12762 | NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad sin6_flowinfo %u, not zero", __func__, proc_best_name(p), pid, npca->address.sin6.sin6_flowinfo); |
| 12763 | return EINVAL; |
| 12764 | } |
| 12765 | if (npca->address.sin6.sin6_scope_id != 0) { |
| 12766 | NECPLOG(LOG_ERR, "%s (process %s:%u) AF_INET6 bad sin6_scope_id %u, not zero", __func__, proc_best_name(p), pid, npca->address.sin6.sin6_scope_id); |
| 12767 | return EINVAL; |
| 12768 | } |
| 12769 | break; |
| 12770 | } |
| 12771 | default: { |
| 12772 | return EINVAL; |
| 12773 | } |
| 12774 | } |
| 12775 | } |
| 12776 | |
| 12777 | // |
| 12778 | // Commit the changed policy |
| 12779 | // |
| 12780 | lck_rw_lock_exclusive(lck: &necp_kernel_policy_lock); |
| 12781 | memset(s: &necp_drop_dest_policy, c: 0, n: sizeof(struct necp_drop_dest_policy)); |
| 12782 | |
| 12783 | necp_drop_dest_policy.entry_count = tmp_drop_dest_policy.entry_count; |
| 12784 | for (u_int32_t i = 0; i < tmp_drop_dest_policy.entry_count; i++) { |
| 12785 | struct necp_drop_dest_entry *tmp_drop_dest_entry = &tmp_drop_dest_policy.entries[i]; |
| 12786 | struct necp_drop_dest_entry *necp_drop_dest_entry = &necp_drop_dest_policy.entries[i]; |
| 12787 | |
| 12788 | memcpy(dst: necp_drop_dest_entry, src: tmp_drop_dest_entry, n: sizeof(struct necp_drop_dest_entry)); |
| 12789 | |
| 12790 | necp_drop_dest_entry->order = necp_get_first_order_for_priority(priority: necp_drop_dest_entry->level); |
| 12791 | } |
| 12792 | lck_rw_done(lck: &necp_kernel_policy_lock); |
| 12793 | |
| 12794 | return 0; |
| 12795 | } |
| 12796 | |
| 12797 | const char* |
| 12798 | necp_get_address_string(union necp_sockaddr_union *address, char addr_str[MAX_IPv6_STR_LEN]) |
| 12799 | { |
| 12800 | uint16_t fam = address->sa.sa_family; |
| 12801 | memset(s: addr_str, c: 0, MAX_IPv6_STR_LEN); |
| 12802 | if (fam == AF_INET) { |
| 12803 | (void) inet_ntop(AF_INET, &address->sin.sin_addr, addr_str, MAX_IPv6_STR_LEN); |
| 12804 | } else if (fam == AF_INET6) { |
| 12805 | (void) inet_ntop(AF_INET6, &address->sin6.sin6_addr, addr_str, MAX_IPv6_STR_LEN); |
| 12806 | } |
| 12807 | return addr_str; |
| 12808 | } |
| 12809 |
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