1 | /* |
2 | * Copyright (c) 2014-2018 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/syslog.h> |
33 | #include <sys/queue.h> |
34 | #include <sys/malloc.h> |
35 | #include <libkern/OSMalloc.h> |
36 | #include <sys/kernel.h> |
37 | #include <sys/kern_control.h> |
38 | #include <sys/mbuf.h> |
39 | #include <sys/kpi_mbuf.h> |
40 | #include <sys/sysctl.h> |
41 | #include <sys/priv.h> |
42 | #include <sys/kern_event.h> |
43 | #include <sys/sysproto.h> |
44 | #include <net/network_agent.h> |
45 | #include <net/if_var.h> |
46 | #include <net/necp.h> |
47 | |
48 | u_int32_t netagent_debug = LOG_NOTICE; // 0=None, 1=Basic |
49 | |
50 | SYSCTL_NODE(_net, OID_AUTO, netagent, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "NetworkAgent" ); |
51 | SYSCTL_INT(_net_netagent, OID_AUTO, debug, CTLFLAG_LOCKED | CTLFLAG_RW, &netagent_debug, 0, "" ); |
52 | |
53 | static int netagent_registered_count = 0; |
54 | SYSCTL_INT(_net_netagent, OID_AUTO, registered_count , CTLFLAG_RD | CTLFLAG_LOCKED, |
55 | &netagent_registered_count, 0, "" ); |
56 | |
57 | static int netagent_active_count = 0; |
58 | SYSCTL_INT(_net_netagent, OID_AUTO, active_count , CTLFLAG_RD | CTLFLAG_LOCKED, |
59 | &netagent_active_count, 0, "" ); |
60 | |
61 | #define NETAGENTLOG(level, format, ...) do { \ |
62 | if (level <= netagent_debug) \ |
63 | log((level > LOG_NOTICE ? LOG_NOTICE : level), "%s: " format "\n", __FUNCTION__, __VA_ARGS__); \ |
64 | } while (0) |
65 | |
66 | #define NETAGENTLOG0(level, msg) do { \ |
67 | if (level <= netagent_debug) \ |
68 | log((level > LOG_NOTICE ? LOG_NOTICE : level), "%s: %s\n", __FUNCTION__, msg); \ |
69 | } while (0) |
70 | |
71 | struct netagent_client { |
72 | LIST_ENTRY(netagent_client) client_chain; |
73 | uuid_t client_id; |
74 | uuid_t client_proc_uuid; |
75 | pid_t client_pid; |
76 | }; |
77 | |
78 | LIST_HEAD(netagent_client_list_s, netagent_client); |
79 | |
80 | struct netagent_wrapper { |
81 | LIST_ENTRY(netagent_wrapper) master_chain; |
82 | u_int32_t control_unit; |
83 | netagent_event_f event_handler; |
84 | void *event_context; |
85 | u_int32_t generation; |
86 | u_int64_t use_count; |
87 | struct netagent_client_list_s pending_triggers_list; |
88 | struct netagent netagent; |
89 | }; |
90 | |
91 | struct netagent_session { |
92 | u_int32_t control_unit; // A control unit of 0 indicates an agent owned by the kernel |
93 | struct netagent_wrapper *wrapper; |
94 | netagent_event_f event_handler; |
95 | void *event_context; |
96 | }; |
97 | |
98 | typedef enum { |
99 | kNetagentErrorDomainPOSIX = 0, |
100 | kNetagentErrorDomainUserDefined = 1, |
101 | } netagent_error_domain_t; |
102 | |
103 | static LIST_HEAD(_netagent_list, netagent_wrapper) master_netagent_list; |
104 | |
105 | // Protected by netagent_lock |
106 | static u_int32_t g_next_generation = 1; |
107 | |
108 | static kern_ctl_ref netagent_kctlref; |
109 | static u_int32_t netagent_family; |
110 | static OSMallocTag netagent_malloc_tag; |
111 | static lck_grp_attr_t *netagent_grp_attr = NULL; |
112 | static lck_attr_t *netagent_mtx_attr = NULL; |
113 | static lck_grp_t *netagent_mtx_grp = NULL; |
114 | decl_lck_rw_data(static, netagent_lock); |
115 | |
116 | static errno_t netagent_register_control(void); |
117 | static errno_t netagent_ctl_connect(kern_ctl_ref kctlref, struct sockaddr_ctl *sac, |
118 | void **unitinfo); |
119 | static errno_t netagent_ctl_disconnect(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo); |
120 | static errno_t netagent_ctl_send(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, |
121 | mbuf_t m, int flags); |
122 | static void netagent_ctl_rcvd(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int flags); |
123 | static errno_t netagent_ctl_getopt(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, |
124 | int opt, void *data, size_t *len); |
125 | static errno_t netagent_ctl_setopt(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, |
126 | int opt, void *data, size_t len); |
127 | |
128 | static int netagent_send_ctl_data(u_int32_t control_unit, u_int8_t *buffer, size_t buffer_size); |
129 | |
130 | static struct netagent_session *netagent_create_session(u_int32_t control_unit); |
131 | static void netagent_delete_session(struct netagent_session *session); |
132 | |
133 | // Register |
134 | static void netagent_handle_register_message(struct netagent_session *session, u_int32_t message_id, |
135 | u_int32_t payload_length, mbuf_t packet, int offset); |
136 | static errno_t netagent_handle_register_setopt(struct netagent_session *session, u_int8_t *payload, |
137 | u_int32_t payload_length); |
138 | |
139 | // Unregister |
140 | static void netagent_handle_unregister_message(struct netagent_session *session, u_int32_t message_id, |
141 | u_int32_t payload_length, mbuf_t packet, int offset); |
142 | static errno_t netagent_handle_unregister_setopt(struct netagent_session *session, u_int8_t *payload, |
143 | u_int32_t payload_length); |
144 | |
145 | // Update |
146 | static void netagent_handle_update_message(struct netagent_session *session, u_int32_t message_id, |
147 | u_int32_t payload_length, mbuf_t packet, int offset); |
148 | static errno_t netagent_handle_update_setopt(struct netagent_session *session, u_int8_t *payload, |
149 | u_int32_t payload_length); |
150 | |
151 | // Assign nexus |
152 | static void netagent_handle_assign_nexus_message(struct netagent_session *session, u_int32_t message_id, |
153 | u_int32_t payload_length, mbuf_t packet, int offset); |
154 | static errno_t netagent_handle_assign_nexus_setopt(struct netagent_session *session, u_int8_t *payload, |
155 | u_int32_t payload_length); |
156 | |
157 | // Set/get assert count |
158 | static errno_t netagent_handle_use_count_setopt(struct netagent_session *session, u_int8_t *payload, size_t payload_length); |
159 | static errno_t netagent_handle_use_count_getopt(struct netagent_session *session, u_int8_t *buffer, size_t *buffer_length); |
160 | |
161 | static void netagent_handle_get(struct netagent_session *session, u_int32_t message_id, |
162 | u_int32_t payload_length, mbuf_t packet, int offset); |
163 | |
164 | static struct netagent_wrapper *netagent_find_agent_with_uuid(uuid_t uuid); |
165 | |
166 | errno_t |
167 | netagent_init(void) |
168 | { |
169 | errno_t result = 0; |
170 | |
171 | result = netagent_register_control(); |
172 | if (result != 0) { |
173 | goto done; |
174 | } |
175 | |
176 | netagent_grp_attr = lck_grp_attr_alloc_init(); |
177 | if (netagent_grp_attr == NULL) { |
178 | NETAGENTLOG0(LOG_ERR, "lck_grp_attr_alloc_init failed" ); |
179 | result = ENOMEM; |
180 | goto done; |
181 | } |
182 | |
183 | netagent_mtx_grp = lck_grp_alloc_init(NETAGENT_CONTROL_NAME, netagent_grp_attr); |
184 | if (netagent_mtx_grp == NULL) { |
185 | NETAGENTLOG0(LOG_ERR, "lck_grp_alloc_init failed" ); |
186 | result = ENOMEM; |
187 | goto done; |
188 | } |
189 | |
190 | netagent_mtx_attr = lck_attr_alloc_init(); |
191 | if (netagent_mtx_attr == NULL) { |
192 | NETAGENTLOG0(LOG_ERR, "lck_attr_alloc_init failed" ); |
193 | result = ENOMEM; |
194 | goto done; |
195 | } |
196 | |
197 | lck_rw_init(&netagent_lock, netagent_mtx_grp, netagent_mtx_attr); |
198 | |
199 | LIST_INIT(&master_netagent_list); |
200 | |
201 | done: |
202 | if (result != 0) { |
203 | if (netagent_mtx_attr != NULL) { |
204 | lck_attr_free(netagent_mtx_attr); |
205 | netagent_mtx_attr = NULL; |
206 | } |
207 | if (netagent_mtx_grp != NULL) { |
208 | lck_grp_free(netagent_mtx_grp); |
209 | netagent_mtx_grp = NULL; |
210 | } |
211 | if (netagent_grp_attr != NULL) { |
212 | lck_grp_attr_free(netagent_grp_attr); |
213 | netagent_grp_attr = NULL; |
214 | } |
215 | if (netagent_kctlref != NULL) { |
216 | ctl_deregister(netagent_kctlref); |
217 | netagent_kctlref = NULL; |
218 | } |
219 | } |
220 | return (result); |
221 | } |
222 | |
223 | static errno_t |
224 | netagent_register_control(void) |
225 | { |
226 | struct kern_ctl_reg kern_ctl; |
227 | errno_t result = 0; |
228 | |
229 | // Create a tag to allocate memory |
230 | netagent_malloc_tag = OSMalloc_Tagalloc(NETAGENT_CONTROL_NAME, OSMT_DEFAULT); |
231 | |
232 | // Find a unique value for our interface family |
233 | result = mbuf_tag_id_find(NETAGENT_CONTROL_NAME, &netagent_family); |
234 | if (result != 0) { |
235 | NETAGENTLOG(LOG_ERR, "mbuf_tag_id_find_internal failed: %d" , result); |
236 | return (result); |
237 | } |
238 | |
239 | bzero(&kern_ctl, sizeof(kern_ctl)); |
240 | strlcpy(kern_ctl.ctl_name, NETAGENT_CONTROL_NAME, sizeof(kern_ctl.ctl_name)); |
241 | kern_ctl.ctl_name[sizeof(kern_ctl.ctl_name) - 1] = 0; |
242 | kern_ctl.ctl_flags = CTL_FLAG_PRIVILEGED; // Require root |
243 | kern_ctl.ctl_sendsize = 64 * 1024; |
244 | kern_ctl.ctl_recvsize = 64 * 1024; |
245 | kern_ctl.ctl_connect = netagent_ctl_connect; |
246 | kern_ctl.ctl_disconnect = netagent_ctl_disconnect; |
247 | kern_ctl.ctl_send = netagent_ctl_send; |
248 | kern_ctl.ctl_rcvd = netagent_ctl_rcvd; |
249 | kern_ctl.ctl_setopt = netagent_ctl_setopt; |
250 | kern_ctl.ctl_getopt = netagent_ctl_getopt; |
251 | |
252 | result = ctl_register(&kern_ctl, &netagent_kctlref); |
253 | if (result != 0) { |
254 | NETAGENTLOG(LOG_ERR, "ctl_register failed: %d" , result); |
255 | return (result); |
256 | } |
257 | |
258 | return (0); |
259 | } |
260 | |
261 | static errno_t |
262 | netagent_ctl_connect(kern_ctl_ref kctlref, struct sockaddr_ctl *sac, void **unitinfo) |
263 | { |
264 | #pragma unused(kctlref) |
265 | *unitinfo = netagent_create_session(sac->sc_unit); |
266 | if (*unitinfo == NULL) { |
267 | // Could not allocate session |
268 | return (ENOBUFS); |
269 | } |
270 | |
271 | return (0); |
272 | } |
273 | |
274 | static errno_t |
275 | netagent_ctl_disconnect(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo) |
276 | { |
277 | #pragma unused(kctlref, unit) |
278 | struct netagent_session *session = (struct netagent_session *)unitinfo; |
279 | if (session != NULL) { |
280 | netagent_delete_session(session); |
281 | } |
282 | |
283 | return (0); |
284 | } |
285 | |
286 | // Kernel events |
287 | static void |
288 | netagent_post_event(uuid_t agent_uuid, u_int32_t event_code, bool update_necp) |
289 | { |
290 | if (update_necp) { |
291 | necp_update_all_clients(); |
292 | } |
293 | |
294 | struct kev_msg ev_msg; |
295 | memset(&ev_msg, 0, sizeof(ev_msg)); |
296 | |
297 | struct kev_netagent_data event_data; |
298 | |
299 | ev_msg.vendor_code = KEV_VENDOR_APPLE; |
300 | ev_msg.kev_class = KEV_NETWORK_CLASS; |
301 | ev_msg.kev_subclass = KEV_NETAGENT_SUBCLASS; |
302 | ev_msg.event_code = event_code; |
303 | |
304 | uuid_copy(event_data.netagent_uuid, agent_uuid); |
305 | ev_msg.dv[0].data_ptr = &event_data; |
306 | ev_msg.dv[0].data_length = sizeof(event_data); |
307 | |
308 | kev_post_msg(&ev_msg); |
309 | } |
310 | |
311 | // Message handling |
312 | static u_int8_t * |
313 | (u_int8_t *buffer, u_int8_t message_type, u_int8_t flags, |
314 | u_int32_t message_id, u_int32_t error, u_int32_t payload_length) |
315 | { |
316 | ((struct netagent_message_header *)(void *)buffer)->message_type = message_type; |
317 | ((struct netagent_message_header *)(void *)buffer)->message_flags = flags; |
318 | ((struct netagent_message_header *)(void *)buffer)->message_id = message_id; |
319 | ((struct netagent_message_header *)(void *)buffer)->message_error = error; |
320 | ((struct netagent_message_header *)(void *)buffer)->message_payload_length = payload_length; |
321 | return (buffer + sizeof(struct netagent_message_header)); |
322 | } |
323 | |
324 | static int |
325 | netagent_send_ctl_data(u_int32_t control_unit, u_int8_t *buffer, size_t buffer_size) |
326 | { |
327 | if (netagent_kctlref == NULL || control_unit == 0 || buffer == NULL || buffer_size == 0) { |
328 | return (EINVAL); |
329 | } |
330 | |
331 | return ctl_enqueuedata(netagent_kctlref, control_unit, buffer, buffer_size, CTL_DATA_EOR); |
332 | } |
333 | |
334 | static int |
335 | netagent_send_trigger(struct netagent_wrapper *wrapper, struct proc *p, u_int32_t flags, u_int32_t trigger_type) |
336 | { |
337 | int error = 0; |
338 | struct netagent_trigger_message *trigger_message = NULL; |
339 | u_int8_t *trigger = NULL; |
340 | size_t trigger_size = sizeof(struct netagent_message_header) + sizeof(struct netagent_trigger_message); |
341 | |
342 | MALLOC(trigger, u_int8_t *, trigger_size, M_NETAGENT, M_WAITOK); |
343 | if (trigger == NULL) { |
344 | return (ENOMEM); |
345 | } |
346 | |
347 | (void)netagent_buffer_write_message_header(trigger, trigger_type, 0, 0, 0, sizeof(struct netagent_trigger_message)); |
348 | |
349 | trigger_message = (struct netagent_trigger_message *)(void *)(trigger + sizeof(struct netagent_message_header)); |
350 | trigger_message->trigger_flags = flags; |
351 | if (p != NULL) { |
352 | trigger_message->trigger_pid = proc_pid(p); |
353 | proc_getexecutableuuid(p, trigger_message->trigger_proc_uuid, sizeof(trigger_message->trigger_proc_uuid)); |
354 | } else { |
355 | trigger_message->trigger_pid = 0; |
356 | uuid_clear(trigger_message->trigger_proc_uuid); |
357 | } |
358 | |
359 | if ((error = netagent_send_ctl_data(wrapper->control_unit, (u_int8_t *)trigger, trigger_size))) { |
360 | NETAGENTLOG(LOG_ERR, "Failed to send trigger message on control unit %d" , wrapper->control_unit); |
361 | } |
362 | |
363 | FREE(trigger, M_NETAGENT); |
364 | return (error); |
365 | } |
366 | |
367 | static int |
368 | netagent_send_client_message(struct netagent_wrapper *wrapper, uuid_t client_id, u_int8_t message_type) |
369 | { |
370 | int error = 0; |
371 | struct netagent_client_message *client_message = NULL; |
372 | u_int8_t *message = NULL; |
373 | size_t message_size = sizeof(struct netagent_message_header) + sizeof(struct netagent_client_message); |
374 | |
375 | MALLOC(message, u_int8_t *, message_size, M_NETAGENT, M_WAITOK); |
376 | if (message == NULL) { |
377 | return (ENOMEM); |
378 | } |
379 | |
380 | (void)netagent_buffer_write_message_header(message, message_type, 0, 0, 0, sizeof(struct netagent_client_message)); |
381 | |
382 | client_message = (struct netagent_client_message *)(void *)(message + sizeof(struct netagent_message_header)); |
383 | uuid_copy(client_message->client_id, client_id); |
384 | |
385 | if ((error = netagent_send_ctl_data(wrapper->control_unit, (u_int8_t *)message, message_size))) { |
386 | NETAGENTLOG(LOG_ERR, "Failed to send client message %d on control unit %d" , message_type, wrapper->control_unit); |
387 | } |
388 | |
389 | FREE(message, M_NETAGENT); |
390 | return (error); |
391 | } |
392 | |
393 | static int |
394 | netagent_send_success_response(struct netagent_session *session, u_int8_t message_type, u_int32_t message_id) |
395 | { |
396 | int error = 0; |
397 | u_int8_t *response = NULL; |
398 | size_t response_size = sizeof(struct netagent_message_header); |
399 | MALLOC(response, u_int8_t *, response_size, M_NETAGENT, M_WAITOK); |
400 | if (response == NULL) { |
401 | return (ENOMEM); |
402 | } |
403 | (void)netagent_buffer_write_message_header(response, message_type, NETAGENT_MESSAGE_FLAGS_RESPONSE, message_id, 0, 0); |
404 | |
405 | if ((error = netagent_send_ctl_data(session->control_unit, (u_int8_t *)response, response_size))) { |
406 | NETAGENTLOG0(LOG_ERR, "Failed to send response" ); |
407 | } |
408 | |
409 | FREE(response, M_NETAGENT); |
410 | return (error); |
411 | } |
412 | |
413 | static int |
414 | netagent_send_error_response(struct netagent_session *session, u_int8_t message_type, |
415 | u_int32_t message_id, u_int32_t error_code) |
416 | { |
417 | int error = 0; |
418 | u_int8_t *response = NULL; |
419 | size_t response_size = sizeof(struct netagent_message_header); |
420 | |
421 | if (session == NULL) { |
422 | NETAGENTLOG0(LOG_ERR, "Got a NULL session" ); |
423 | return (EINVAL); |
424 | } |
425 | |
426 | MALLOC(response, u_int8_t *, response_size, M_NETAGENT, M_WAITOK); |
427 | if (response == NULL) { |
428 | return (ENOMEM); |
429 | } |
430 | (void)netagent_buffer_write_message_header(response, message_type, NETAGENT_MESSAGE_FLAGS_RESPONSE, |
431 | message_id, error_code, 0); |
432 | |
433 | if ((error = netagent_send_ctl_data(session->control_unit, (u_int8_t *)response, response_size))) { |
434 | NETAGENTLOG0(LOG_ERR, "Failed to send response" ); |
435 | } |
436 | |
437 | FREE(response, M_NETAGENT); |
438 | return (error); |
439 | } |
440 | |
441 | static errno_t |
442 | netagent_ctl_send(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, mbuf_t packet, int flags) |
443 | { |
444 | #pragma unused(kctlref, unit, flags) |
445 | struct netagent_session *session = (struct netagent_session *)unitinfo; |
446 | struct netagent_message_header ; |
447 | int error = 0; |
448 | |
449 | if (session == NULL) { |
450 | NETAGENTLOG0(LOG_ERR, "Got a NULL session" ); |
451 | error = EINVAL; |
452 | goto done; |
453 | } |
454 | |
455 | if (mbuf_pkthdr_len(packet) < sizeof(header)) { |
456 | NETAGENTLOG(LOG_ERR, "Got a bad packet, length (%lu) < sizeof header (%lu)" , |
457 | mbuf_pkthdr_len(packet), sizeof(header)); |
458 | error = EINVAL; |
459 | goto done; |
460 | } |
461 | |
462 | error = mbuf_copydata(packet, 0, sizeof(header), &header); |
463 | if (error) { |
464 | NETAGENTLOG(LOG_ERR, "mbuf_copydata failed for the header: %d" , error); |
465 | error = ENOBUFS; |
466 | goto done; |
467 | } |
468 | |
469 | switch (header.message_type) { |
470 | case NETAGENT_MESSAGE_TYPE_REGISTER: { |
471 | netagent_handle_register_message(session, header.message_id, header.message_payload_length, |
472 | packet, sizeof(header)); |
473 | break; |
474 | } |
475 | case NETAGENT_MESSAGE_TYPE_UNREGISTER: { |
476 | netagent_handle_unregister_message(session, header.message_id, header.message_payload_length, |
477 | packet, sizeof(header)); |
478 | break; |
479 | } |
480 | case NETAGENT_MESSAGE_TYPE_UPDATE: { |
481 | netagent_handle_update_message(session, header.message_id, header.message_payload_length, |
482 | packet, sizeof(header)); |
483 | break; |
484 | } |
485 | case NETAGENT_MESSAGE_TYPE_GET: { |
486 | netagent_handle_get(session, header.message_id, header.message_payload_length, |
487 | packet, sizeof(header)); |
488 | break; |
489 | } |
490 | case NETAGENT_MESSAGE_TYPE_ASSERT: { |
491 | NETAGENTLOG0(LOG_ERR, "NETAGENT_MESSAGE_TYPE_ASSERT no longer supported" ); |
492 | break; |
493 | } |
494 | case NETAGENT_MESSAGE_TYPE_UNASSERT: { |
495 | NETAGENTLOG0(LOG_ERR, "NETAGENT_MESSAGE_TYPE_UNASSERT no longer supported" ); |
496 | break; |
497 | } |
498 | case NETAGENT_MESSAGE_TYPE_ASSIGN_NEXUS: { |
499 | netagent_handle_assign_nexus_message(session, header.message_id, header.message_payload_length, |
500 | packet, sizeof(header)); |
501 | break; |
502 | } |
503 | default: { |
504 | NETAGENTLOG(LOG_ERR, "Received unknown message type %d" , header.message_type); |
505 | netagent_send_error_response(session, header.message_type, header.message_id, |
506 | NETAGENT_MESSAGE_ERROR_UNKNOWN_TYPE); |
507 | break; |
508 | } |
509 | } |
510 | |
511 | done: |
512 | mbuf_freem(packet); |
513 | return (error); |
514 | } |
515 | |
516 | static void |
517 | netagent_ctl_rcvd(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int flags) |
518 | { |
519 | #pragma unused(kctlref, unit, unitinfo, flags) |
520 | return; |
521 | } |
522 | |
523 | static errno_t |
524 | netagent_ctl_getopt(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int opt, |
525 | void *data, size_t *len) |
526 | { |
527 | #pragma unused(kctlref, unit) |
528 | struct netagent_session *session = (struct netagent_session *)unitinfo; |
529 | errno_t error; |
530 | |
531 | if (session == NULL) { |
532 | NETAGENTLOG0(LOG_ERR, "Received a NULL session" ); |
533 | error = EINVAL; |
534 | goto done; |
535 | } |
536 | |
537 | switch (opt) { |
538 | case NETAGENT_OPTION_TYPE_USE_COUNT: { |
539 | NETAGENTLOG0(LOG_DEBUG, "Request to get use count" ); |
540 | error = netagent_handle_use_count_getopt(session, data, len); |
541 | } |
542 | break; |
543 | default: |
544 | NETAGENTLOG0(LOG_ERR, "Received unknown option" ); |
545 | error = ENOPROTOOPT; |
546 | break; |
547 | } |
548 | |
549 | done: |
550 | return (error); |
551 | } |
552 | |
553 | static errno_t |
554 | netagent_ctl_setopt(kern_ctl_ref kctlref, u_int32_t unit, void *unitinfo, int opt, |
555 | void *data, size_t len) |
556 | { |
557 | #pragma unused(kctlref, unit) |
558 | struct netagent_session *session = (struct netagent_session *)unitinfo; |
559 | errno_t error; |
560 | |
561 | if (session == NULL) { |
562 | NETAGENTLOG0(LOG_ERR, "Received a NULL session" ); |
563 | error = EINVAL; |
564 | goto done; |
565 | } |
566 | |
567 | switch (opt) { |
568 | case NETAGENT_OPTION_TYPE_REGISTER: { |
569 | NETAGENTLOG0(LOG_DEBUG, "Request for registration" ); |
570 | error = netagent_handle_register_setopt(session, data, len); |
571 | } |
572 | break; |
573 | case NETAGENT_OPTION_TYPE_UPDATE: { |
574 | NETAGENTLOG0(LOG_DEBUG, "Request for update" ); |
575 | error = netagent_handle_update_setopt(session, data, len); |
576 | } |
577 | break; |
578 | case NETAGENT_OPTION_TYPE_UNREGISTER: { |
579 | NETAGENTLOG0(LOG_DEBUG, "Request for unregistration" ); |
580 | error = netagent_handle_unregister_setopt(session, data, len); |
581 | } |
582 | break; |
583 | case NETAGENT_OPTION_TYPE_ASSIGN_NEXUS: { |
584 | NETAGENTLOG0(LOG_DEBUG, "Request for assigning nexus" ); |
585 | error = netagent_handle_assign_nexus_setopt(session, data, len); |
586 | } |
587 | break; |
588 | case NETAGENT_OPTION_TYPE_USE_COUNT: { |
589 | NETAGENTLOG0(LOG_DEBUG, "Request to set use count" ); |
590 | error = netagent_handle_use_count_setopt(session, data, len); |
591 | } |
592 | break; |
593 | default: |
594 | NETAGENTLOG0(LOG_ERR, "Received unknown option" ); |
595 | error = ENOPROTOOPT; |
596 | break; |
597 | } |
598 | |
599 | done: |
600 | return (error); |
601 | } |
602 | |
603 | // Session Management |
604 | static struct netagent_session * |
605 | netagent_create_session(u_int32_t control_unit) |
606 | { |
607 | struct netagent_session *new_session = NULL; |
608 | |
609 | MALLOC(new_session, struct netagent_session *, sizeof(*new_session), M_NETAGENT, M_WAITOK); |
610 | if (new_session == NULL) { |
611 | goto done; |
612 | } |
613 | NETAGENTLOG(LOG_DEBUG, "Create agent session, control unit %d" , control_unit); |
614 | memset(new_session, 0, sizeof(*new_session)); |
615 | new_session->control_unit = control_unit; |
616 | new_session->wrapper = NULL; |
617 | done: |
618 | return (new_session); |
619 | } |
620 | |
621 | netagent_session_t netagent_create(netagent_event_f event_handler, void *context) |
622 | { |
623 | struct netagent_session *session = netagent_create_session(0); |
624 | if (session == NULL) { |
625 | return NULL; |
626 | } |
627 | |
628 | session->event_handler = event_handler; |
629 | session->event_context = context; |
630 | return session; |
631 | } |
632 | |
633 | static void |
634 | netagent_free_wrapper(struct netagent_wrapper *wrapper) |
635 | { |
636 | // Free any pending client triggers |
637 | struct netagent_client *search_client = NULL; |
638 | struct netagent_client *temp_client = NULL; |
639 | LIST_FOREACH_SAFE(search_client, &wrapper->pending_triggers_list, client_chain, temp_client) { |
640 | LIST_REMOVE(search_client, client_chain); |
641 | FREE(search_client, M_NETAGENT); |
642 | } |
643 | |
644 | // Free wrapper itself |
645 | FREE(wrapper, M_NETAGENT); |
646 | } |
647 | |
648 | static void |
649 | netagent_unregister_session_wrapper(struct netagent_session *session) |
650 | { |
651 | bool unregistered = FALSE; |
652 | uuid_t unregistered_uuid; |
653 | struct netagent_wrapper *wrapper = NULL; |
654 | lck_rw_lock_exclusive(&netagent_lock); |
655 | if (session != NULL) { |
656 | wrapper = session->wrapper; |
657 | if (wrapper != NULL) { |
658 | if (netagent_registered_count > 0) { |
659 | netagent_registered_count--; |
660 | } |
661 | if ((session->wrapper->netagent.netagent_flags & NETAGENT_FLAG_ACTIVE) && |
662 | netagent_active_count > 0) { |
663 | netagent_active_count--; |
664 | } |
665 | |
666 | LIST_REMOVE(wrapper, master_chain); |
667 | |
668 | unregistered = TRUE; |
669 | uuid_copy(unregistered_uuid, session->wrapper->netagent.netagent_uuid); |
670 | |
671 | netagent_free_wrapper(session->wrapper); |
672 | session->wrapper = NULL; |
673 | NETAGENTLOG0(LOG_DEBUG, "Unregistered agent" ); |
674 | } |
675 | } |
676 | lck_rw_done(&netagent_lock); |
677 | |
678 | if (unregistered) { |
679 | ifnet_clear_netagent(unregistered_uuid); |
680 | netagent_post_event(unregistered_uuid, KEV_NETAGENT_UNREGISTERED, TRUE); |
681 | } |
682 | } |
683 | |
684 | static void |
685 | netagent_delete_session(struct netagent_session *session) |
686 | { |
687 | if (session != NULL) { |
688 | netagent_unregister_session_wrapper(session); |
689 | FREE(session, M_NETAGENT); |
690 | } |
691 | } |
692 | |
693 | void netagent_destroy(netagent_session_t session) |
694 | { |
695 | return netagent_delete_session((struct netagent_session *)session); |
696 | } |
697 | |
698 | static int |
699 | netagent_packet_get_netagent_data_size(mbuf_t packet, int offset, int *err) |
700 | { |
701 | int error = 0; |
702 | |
703 | struct netagent netagent_peek; |
704 | memset(&netagent_peek, 0, sizeof(netagent_peek)); |
705 | |
706 | *err = 0; |
707 | |
708 | error = mbuf_copydata(packet, offset, sizeof(netagent_peek), &netagent_peek); |
709 | if (error) { |
710 | *err = ENOENT; |
711 | return (-1); |
712 | } |
713 | |
714 | return (netagent_peek.netagent_data_size); |
715 | } |
716 | |
717 | static errno_t |
718 | netagent_handle_register_inner(struct netagent_session *session, struct netagent_wrapper *new_wrapper) |
719 | { |
720 | lck_rw_lock_exclusive(&netagent_lock); |
721 | |
722 | new_wrapper->control_unit = session->control_unit; |
723 | new_wrapper->event_handler = session->event_handler; |
724 | new_wrapper->event_context = session->event_context; |
725 | new_wrapper->generation = g_next_generation++; |
726 | |
727 | session->wrapper = new_wrapper; |
728 | LIST_INSERT_HEAD(&master_netagent_list, new_wrapper, master_chain); |
729 | LIST_INIT(&new_wrapper->pending_triggers_list); |
730 | |
731 | new_wrapper->netagent.netagent_flags |= NETAGENT_FLAG_REGISTERED; |
732 | netagent_registered_count++; |
733 | if (new_wrapper->netagent.netagent_flags & NETAGENT_FLAG_ACTIVE) { |
734 | netagent_active_count++; |
735 | } |
736 | |
737 | lck_rw_done(&netagent_lock); |
738 | |
739 | return 0; |
740 | } |
741 | |
742 | errno_t |
743 | netagent_register(netagent_session_t _session, struct netagent *agent) |
744 | { |
745 | int data_size = 0; |
746 | struct netagent_wrapper *new_wrapper = NULL; |
747 | |
748 | struct netagent_session *session = (struct netagent_session *)_session; |
749 | if (session == NULL) { |
750 | NETAGENTLOG0(LOG_ERR, "Cannot register agent on NULL session" ); |
751 | return EINVAL; |
752 | } |
753 | |
754 | if (agent == NULL) { |
755 | NETAGENTLOG0(LOG_ERR, "Cannot register NULL agent" ); |
756 | return EINVAL; |
757 | } |
758 | |
759 | if (session->wrapper != NULL) { |
760 | NETAGENTLOG0(LOG_ERR, "Session already has a registered agent" ); |
761 | return EINVAL; |
762 | } |
763 | |
764 | data_size = agent->netagent_data_size; |
765 | if (data_size < 0 || data_size > NETAGENT_MAX_DATA_SIZE) { |
766 | NETAGENTLOG(LOG_ERR, "Register message size could not be read, data_size %d" , |
767 | data_size); |
768 | return EINVAL; |
769 | } |
770 | |
771 | MALLOC(new_wrapper, struct netagent_wrapper *, sizeof(*new_wrapper) + data_size, M_NETAGENT, M_WAITOK); |
772 | if (new_wrapper == NULL) { |
773 | NETAGENTLOG0(LOG_ERR, "Failed to allocate agent" ); |
774 | return ENOMEM; |
775 | } |
776 | |
777 | memset(new_wrapper, 0, sizeof(*new_wrapper) + data_size); |
778 | memcpy(&new_wrapper->netagent, agent, sizeof(struct netagent) + data_size); |
779 | |
780 | int error = netagent_handle_register_inner(session, new_wrapper); |
781 | if (error != 0) { |
782 | FREE(new_wrapper, M_NETAGENT); |
783 | return error; |
784 | } |
785 | |
786 | NETAGENTLOG0(LOG_DEBUG, "Registered new agent" ); |
787 | netagent_post_event(new_wrapper->netagent.netagent_uuid, KEV_NETAGENT_REGISTERED, TRUE); |
788 | |
789 | return 0; |
790 | } |
791 | |
792 | static errno_t |
793 | netagent_handle_register_setopt(struct netagent_session *session, u_int8_t *payload, |
794 | u_int32_t payload_length) |
795 | { |
796 | int data_size = 0; |
797 | struct netagent_wrapper *new_wrapper = NULL; |
798 | u_int32_t response_error = 0; |
799 | struct netagent *register_netagent = (struct netagent *)(void *)payload; |
800 | |
801 | if (session == NULL) { |
802 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
803 | response_error = EINVAL; |
804 | goto done; |
805 | } |
806 | |
807 | if (payload == NULL) { |
808 | NETAGENTLOG0(LOG_ERR, "No payload received" ); |
809 | response_error = EINVAL; |
810 | goto done; |
811 | } |
812 | |
813 | if (session->wrapper != NULL) { |
814 | NETAGENTLOG0(LOG_ERR, "Session already has a registered agent" ); |
815 | response_error = EINVAL; |
816 | goto done; |
817 | } |
818 | |
819 | if (payload_length < sizeof(struct netagent)) { |
820 | NETAGENTLOG(LOG_ERR, "Register message size too small for agent: (%u < %lu)" , |
821 | payload_length, sizeof(struct netagent)); |
822 | response_error = EINVAL; |
823 | goto done; |
824 | } |
825 | |
826 | data_size = register_netagent->netagent_data_size; |
827 | if (data_size < 0 || data_size > NETAGENT_MAX_DATA_SIZE) { |
828 | NETAGENTLOG(LOG_ERR, "Register message size could not be read, data_size %d" , data_size); |
829 | response_error = EINVAL; |
830 | goto done; |
831 | } |
832 | |
833 | if (payload_length != (sizeof(struct netagent) + data_size)) { |
834 | NETAGENTLOG(LOG_ERR, "Mismatch between data size and payload length (%lu != %u)" , (sizeof(struct netagent) + data_size), payload_length); |
835 | response_error = EINVAL; |
836 | goto done; |
837 | } |
838 | |
839 | MALLOC(new_wrapper, struct netagent_wrapper *, sizeof(*new_wrapper) + data_size, M_NETAGENT, M_WAITOK); |
840 | if (new_wrapper == NULL) { |
841 | NETAGENTLOG0(LOG_ERR, "Failed to allocate agent" ); |
842 | response_error = ENOMEM; |
843 | goto done; |
844 | } |
845 | |
846 | memset(new_wrapper, 0, sizeof(*new_wrapper) + data_size); |
847 | memcpy(&new_wrapper->netagent, register_netagent, sizeof(struct netagent) + data_size); |
848 | |
849 | response_error = netagent_handle_register_inner(session, new_wrapper); |
850 | if (response_error != 0) { |
851 | FREE(new_wrapper, M_NETAGENT); |
852 | goto done; |
853 | } |
854 | |
855 | NETAGENTLOG0(LOG_DEBUG, "Registered new agent" ); |
856 | netagent_post_event(new_wrapper->netagent.netagent_uuid, KEV_NETAGENT_REGISTERED, TRUE); |
857 | |
858 | done: |
859 | return response_error; |
860 | } |
861 | |
862 | static void |
863 | netagent_handle_register_message(struct netagent_session *session, u_int32_t message_id, |
864 | u_int32_t payload_length, mbuf_t packet, int offset) |
865 | { |
866 | int error; |
867 | int data_size = 0; |
868 | struct netagent_wrapper *new_wrapper = NULL; |
869 | u_int32_t response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
870 | uuid_t netagent_uuid; |
871 | uuid_clear(netagent_uuid); |
872 | |
873 | if (session == NULL) { |
874 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
875 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
876 | goto fail; |
877 | } |
878 | |
879 | if (session->wrapper != NULL) { |
880 | NETAGENTLOG0(LOG_ERR, "Session already has a registered agent" ); |
881 | response_error = NETAGENT_MESSAGE_ERROR_ALREADY_REGISTERED; |
882 | goto fail; |
883 | } |
884 | |
885 | if (payload_length < sizeof(struct netagent)) { |
886 | NETAGENTLOG(LOG_ERR, "Register message size too small for agent: (%u < %lu)" , |
887 | payload_length, sizeof(struct netagent)); |
888 | response_error = NETAGENT_MESSAGE_ERROR_INVALID_DATA; |
889 | goto fail; |
890 | } |
891 | |
892 | data_size = netagent_packet_get_netagent_data_size(packet, offset, &error); |
893 | if (error || data_size < 0 || data_size > NETAGENT_MAX_DATA_SIZE) { |
894 | NETAGENTLOG(LOG_ERR, "Register message size could not be read, error %d data_size %d" , |
895 | error, data_size); |
896 | response_error = NETAGENT_MESSAGE_ERROR_INVALID_DATA; |
897 | goto fail; |
898 | } |
899 | |
900 | MALLOC(new_wrapper, struct netagent_wrapper *, sizeof(*new_wrapper) + data_size, M_NETAGENT, M_WAITOK); |
901 | if (new_wrapper == NULL) { |
902 | NETAGENTLOG0(LOG_ERR, "Failed to allocate agent" ); |
903 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
904 | goto fail; |
905 | } |
906 | |
907 | memset(new_wrapper, 0, sizeof(*new_wrapper) + data_size); |
908 | |
909 | error = mbuf_copydata(packet, offset, sizeof(struct netagent) + data_size, |
910 | &new_wrapper->netagent); |
911 | if (error) { |
912 | NETAGENTLOG(LOG_ERR, "Failed to read data into agent structure: %d" , error); |
913 | FREE(new_wrapper, M_NETAGENT); |
914 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
915 | goto fail; |
916 | } |
917 | |
918 | (void)netagent_handle_register_inner(session, new_wrapper); |
919 | |
920 | NETAGENTLOG0(LOG_DEBUG, "Registered new agent" ); |
921 | netagent_send_success_response(session, NETAGENT_MESSAGE_TYPE_REGISTER, message_id); |
922 | netagent_post_event(new_wrapper->netagent.netagent_uuid, KEV_NETAGENT_REGISTERED, TRUE); |
923 | return; |
924 | fail: |
925 | netagent_send_error_response(session, NETAGENT_MESSAGE_TYPE_REGISTER, message_id, response_error); |
926 | } |
927 | |
928 | errno_t |
929 | netagent_unregister(netagent_session_t _session) |
930 | { |
931 | struct netagent_session *session = (struct netagent_session *)_session; |
932 | if (session == NULL) { |
933 | NETAGENTLOG0(LOG_ERR, "Cannot unregister NULL session" ); |
934 | return EINVAL; |
935 | } |
936 | |
937 | netagent_unregister_session_wrapper(session); |
938 | return 0; |
939 | } |
940 | |
941 | static errno_t |
942 | netagent_handle_unregister_setopt(struct netagent_session *session, u_int8_t *payload, |
943 | u_int32_t payload_length) |
944 | { |
945 | #pragma unused(payload, payload_length) |
946 | u_int32_t response_error = 0; |
947 | |
948 | if (session == NULL) { |
949 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
950 | response_error = EINVAL; |
951 | goto done; |
952 | } |
953 | |
954 | netagent_unregister_session_wrapper(session); |
955 | |
956 | done: |
957 | return response_error; |
958 | } |
959 | |
960 | static void |
961 | netagent_handle_unregister_message(struct netagent_session *session, u_int32_t message_id, |
962 | u_int32_t payload_length, mbuf_t packet, int offset) |
963 | { |
964 | #pragma unused(payload_length, packet, offset) |
965 | u_int32_t response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
966 | |
967 | if (session == NULL) { |
968 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
969 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
970 | goto fail; |
971 | } |
972 | |
973 | netagent_unregister_session_wrapper(session); |
974 | |
975 | netagent_send_success_response(session, NETAGENT_MESSAGE_TYPE_UNREGISTER, message_id); |
976 | return; |
977 | fail: |
978 | netagent_send_error_response(session, NETAGENT_MESSAGE_TYPE_UNREGISTER, message_id, response_error); |
979 | } |
980 | |
981 | static void |
982 | netagent_send_cellular_failed_event(struct netagent_wrapper *wrapper, |
983 | pid_t pid, uuid_t proc_uuid) |
984 | { |
985 | if (strncmp(wrapper->netagent.netagent_domain, "Cellular" , NETAGENT_DOMAINSIZE) != 0) { |
986 | return; |
987 | } |
988 | |
989 | struct kev_netpolicy_ifdenied ev_ifdenied; |
990 | |
991 | bzero(&ev_ifdenied, sizeof(ev_ifdenied)); |
992 | |
993 | ev_ifdenied.ev_data.epid = pid; |
994 | uuid_copy(ev_ifdenied.ev_data.euuid, proc_uuid); |
995 | ev_ifdenied.ev_if_functional_type = IFRTYPE_FUNCTIONAL_CELLULAR; |
996 | |
997 | netpolicy_post_msg(KEV_NETPOLICY_IFFAILED, &ev_ifdenied.ev_data, sizeof(ev_ifdenied)); |
998 | } |
999 | |
1000 | static errno_t |
1001 | netagent_handle_update_inner(struct netagent_session *session, struct netagent_wrapper *new_wrapper, u_int32_t data_size, u_int8_t *agent_changed, netagent_error_domain_t error_domain) |
1002 | { |
1003 | u_int32_t response_error = 0; |
1004 | |
1005 | if (agent_changed == NULL) { |
1006 | NETAGENTLOG0(LOG_ERR, "Invalid argument: agent_changed" ); |
1007 | return EINVAL; |
1008 | } |
1009 | |
1010 | lck_rw_lock_exclusive(&netagent_lock); |
1011 | |
1012 | if (uuid_compare(session->wrapper->netagent.netagent_uuid, new_wrapper->netagent.netagent_uuid) != 0 || |
1013 | memcmp(&session->wrapper->netagent.netagent_domain, &new_wrapper->netagent.netagent_domain, |
1014 | sizeof(new_wrapper->netagent.netagent_domain)) != 0 || |
1015 | memcmp(&session->wrapper->netagent.netagent_type, &new_wrapper->netagent.netagent_type, |
1016 | sizeof(new_wrapper->netagent.netagent_type)) != 0) { |
1017 | lck_rw_done(&netagent_lock); |
1018 | NETAGENTLOG0(LOG_ERR, "Basic agent parameters do not match, cannot update" ); |
1019 | if (error_domain == kNetagentErrorDomainPOSIX) { |
1020 | response_error = EINVAL; |
1021 | } else if (error_domain == kNetagentErrorDomainUserDefined) { |
1022 | response_error = NETAGENT_MESSAGE_ERROR_CANNOT_UPDATE; |
1023 | } |
1024 | return response_error; |
1025 | } |
1026 | |
1027 | new_wrapper->netagent.netagent_flags |= NETAGENT_FLAG_REGISTERED; |
1028 | if (session->wrapper->netagent.netagent_data_size == new_wrapper->netagent.netagent_data_size && |
1029 | memcmp(&session->wrapper->netagent, &new_wrapper->netagent, sizeof(struct netagent) + data_size) == 0) { |
1030 | // Agent is exactly identical, don't increment the generation count |
1031 | |
1032 | // Make a copy of the list of pending clients, and clear the current list |
1033 | struct netagent_client_list_s pending_triggers_list_copy; |
1034 | LIST_INIT(&pending_triggers_list_copy); |
1035 | struct netagent_client *search_client = NULL; |
1036 | struct netagent_client *temp_client = NULL; |
1037 | LIST_FOREACH_SAFE(search_client, &session->wrapper->pending_triggers_list, client_chain, temp_client) { |
1038 | LIST_REMOVE(search_client, client_chain); |
1039 | LIST_INSERT_HEAD(&pending_triggers_list_copy, search_client, client_chain); |
1040 | } |
1041 | lck_rw_done(&netagent_lock); |
1042 | |
1043 | // Update pending client triggers without holding a lock |
1044 | search_client = NULL; |
1045 | temp_client = NULL; |
1046 | LIST_FOREACH_SAFE(search_client, &pending_triggers_list_copy, client_chain, temp_client) { |
1047 | necp_force_update_client(search_client->client_id, session->wrapper->netagent.netagent_uuid, session->wrapper->generation); |
1048 | netagent_send_cellular_failed_event(new_wrapper, search_client->client_pid, search_client->client_proc_uuid); |
1049 | LIST_REMOVE(search_client, client_chain); |
1050 | FREE(search_client, M_NETAGENT); |
1051 | } |
1052 | NETAGENTLOG0(LOG_DEBUG, "Updated agent (no changes)" ); |
1053 | *agent_changed = FALSE; |
1054 | return response_error; |
1055 | } |
1056 | |
1057 | new_wrapper->generation = g_next_generation++; |
1058 | new_wrapper->use_count = session->wrapper->use_count; |
1059 | |
1060 | if ((new_wrapper->netagent.netagent_flags & NETAGENT_FLAG_ACTIVE) && |
1061 | !(session->wrapper->netagent.netagent_flags & NETAGENT_FLAG_ACTIVE)) { |
1062 | netagent_active_count++; |
1063 | } else if (!(new_wrapper->netagent.netagent_flags & NETAGENT_FLAG_ACTIVE) && |
1064 | (session->wrapper->netagent.netagent_flags & NETAGENT_FLAG_ACTIVE) && |
1065 | netagent_active_count > 0) { |
1066 | netagent_active_count--; |
1067 | } |
1068 | |
1069 | LIST_REMOVE(session->wrapper, master_chain); |
1070 | netagent_free_wrapper(session->wrapper); |
1071 | session->wrapper = new_wrapper; |
1072 | new_wrapper->control_unit = session->control_unit; |
1073 | new_wrapper->event_handler = session->event_handler; |
1074 | new_wrapper->event_context = session->event_context; |
1075 | LIST_INSERT_HEAD(&master_netagent_list, new_wrapper, master_chain); |
1076 | LIST_INIT(&new_wrapper->pending_triggers_list); |
1077 | |
1078 | NETAGENTLOG0(LOG_DEBUG, "Updated agent" ); |
1079 | *agent_changed = TRUE; |
1080 | |
1081 | lck_rw_done(&netagent_lock); |
1082 | |
1083 | return response_error; |
1084 | } |
1085 | |
1086 | errno_t |
1087 | netagent_update(netagent_session_t _session, struct netagent *agent) |
1088 | { |
1089 | u_int8_t agent_changed; |
1090 | int data_size = 0; |
1091 | struct netagent_wrapper *new_wrapper = NULL; |
1092 | |
1093 | struct netagent_session *session = (struct netagent_session *)_session; |
1094 | if (session == NULL) { |
1095 | NETAGENTLOG0(LOG_ERR, "Cannot update agent on NULL session" ); |
1096 | return EINVAL; |
1097 | } |
1098 | |
1099 | if (agent == NULL) { |
1100 | NETAGENTLOG0(LOG_ERR, "Cannot register NULL agent" ); |
1101 | return EINVAL; |
1102 | } |
1103 | |
1104 | if (session->wrapper == NULL) { |
1105 | NETAGENTLOG0(LOG_ERR, "Session has no agent to update" ); |
1106 | return EINVAL; |
1107 | } |
1108 | |
1109 | data_size = agent->netagent_data_size; |
1110 | if (data_size > NETAGENT_MAX_DATA_SIZE) { |
1111 | NETAGENTLOG(LOG_ERR, "Update message size (%u > %u) too large" , data_size, NETAGENT_MAX_DATA_SIZE); |
1112 | return EINVAL; |
1113 | } |
1114 | |
1115 | MALLOC(new_wrapper, struct netagent_wrapper *, sizeof(*new_wrapper) + data_size, M_NETAGENT, M_WAITOK); |
1116 | if (new_wrapper == NULL) { |
1117 | NETAGENTLOG0(LOG_ERR, "Failed to allocate agent" ); |
1118 | return ENOMEM; |
1119 | } |
1120 | |
1121 | memset(new_wrapper, 0, sizeof(*new_wrapper) + data_size); |
1122 | memcpy(&new_wrapper->netagent, agent, sizeof(struct netagent) + data_size); |
1123 | |
1124 | int error = netagent_handle_update_inner(session, new_wrapper, data_size, &agent_changed, kNetagentErrorDomainPOSIX); |
1125 | if (error == 0) { |
1126 | netagent_post_event(session->wrapper->netagent.netagent_uuid, KEV_NETAGENT_UPDATED, agent_changed); |
1127 | if (agent_changed == FALSE) { |
1128 | // The session wrapper does not need the "new_wrapper" as nothing changed |
1129 | FREE(new_wrapper, M_NETAGENT); |
1130 | } |
1131 | } else { |
1132 | FREE(new_wrapper, M_NETAGENT); |
1133 | return error; |
1134 | } |
1135 | |
1136 | return 0; |
1137 | } |
1138 | |
1139 | static errno_t |
1140 | netagent_handle_update_setopt(struct netagent_session *session, u_int8_t *payload, u_int32_t payload_length) |
1141 | { |
1142 | u_int32_t data_size = 0; |
1143 | struct netagent_wrapper *new_wrapper = NULL; |
1144 | errno_t response_error = 0; |
1145 | struct netagent *update_netagent = (struct netagent *)(void *)payload; |
1146 | u_int8_t agent_changed; |
1147 | |
1148 | if (session == NULL) { |
1149 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
1150 | response_error = EINVAL; |
1151 | goto done; |
1152 | } |
1153 | |
1154 | if (payload == NULL) { |
1155 | NETAGENTLOG0(LOG_ERR, "No payload received" ); |
1156 | response_error = EINVAL; |
1157 | goto done; |
1158 | } |
1159 | |
1160 | if (session->wrapper == NULL) { |
1161 | NETAGENTLOG0(LOG_ERR, "Session has no agent to update" ); |
1162 | response_error = ENOENT; |
1163 | goto done; |
1164 | } |
1165 | |
1166 | if (payload_length < sizeof(struct netagent)) { |
1167 | NETAGENTLOG(LOG_ERR, "Update message size too small for agent: (%u < %lu)" , |
1168 | payload_length, sizeof(struct netagent)); |
1169 | response_error = EINVAL; |
1170 | goto done; |
1171 | } |
1172 | |
1173 | data_size = update_netagent->netagent_data_size; |
1174 | if (data_size > NETAGENT_MAX_DATA_SIZE) { |
1175 | NETAGENTLOG(LOG_ERR, "Update message size (%u > %u) too large" , data_size, NETAGENT_MAX_DATA_SIZE); |
1176 | response_error = EINVAL; |
1177 | goto done; |
1178 | } |
1179 | |
1180 | if (payload_length != (sizeof(struct netagent) + data_size)) { |
1181 | NETAGENTLOG(LOG_ERR, "Mismatch between data size and payload length (%lu != %u)" , (sizeof(struct netagent) + data_size), payload_length); |
1182 | response_error = EINVAL; |
1183 | goto done; |
1184 | } |
1185 | |
1186 | MALLOC(new_wrapper, struct netagent_wrapper *, sizeof(*new_wrapper) + data_size, M_NETAGENT, M_WAITOK); |
1187 | if (new_wrapper == NULL) { |
1188 | NETAGENTLOG0(LOG_ERR, "Failed to allocate agent" ); |
1189 | response_error = ENOMEM; |
1190 | goto done; |
1191 | } |
1192 | |
1193 | memset(new_wrapper, 0, sizeof(*new_wrapper) + data_size); |
1194 | memcpy(&new_wrapper->netagent, update_netagent, sizeof(struct netagent) + data_size); |
1195 | |
1196 | response_error = netagent_handle_update_inner(session, new_wrapper, data_size, &agent_changed, kNetagentErrorDomainPOSIX); |
1197 | if (response_error == 0) { |
1198 | netagent_post_event(session->wrapper->netagent.netagent_uuid, KEV_NETAGENT_UPDATED, agent_changed); |
1199 | if (agent_changed == FALSE) { |
1200 | // The session wrapper does not need the "new_wrapper" as nothing changed |
1201 | FREE(new_wrapper, M_NETAGENT); |
1202 | } |
1203 | } else { |
1204 | FREE(new_wrapper, M_NETAGENT); |
1205 | } |
1206 | |
1207 | done: |
1208 | return response_error; |
1209 | } |
1210 | |
1211 | static void |
1212 | netagent_handle_update_message(struct netagent_session *session, u_int32_t message_id, |
1213 | u_int32_t payload_length, mbuf_t packet, int offset) |
1214 | { |
1215 | int error; |
1216 | int data_size = 0; |
1217 | struct netagent_wrapper *new_wrapper = NULL; |
1218 | u_int32_t response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1219 | u_int8_t agent_changed; |
1220 | |
1221 | if (session == NULL) { |
1222 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
1223 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1224 | goto fail; |
1225 | } |
1226 | |
1227 | if (session->wrapper == NULL) { |
1228 | NETAGENTLOG0(LOG_ERR, "Session has no agent to update" ); |
1229 | response_error = NETAGENT_MESSAGE_ERROR_NOT_REGISTERED; |
1230 | goto fail; |
1231 | } |
1232 | |
1233 | if (payload_length < sizeof(struct netagent)) { |
1234 | NETAGENTLOG(LOG_ERR, "Update message size too small for agent: (%u < %lu)" , |
1235 | payload_length, sizeof(struct netagent)); |
1236 | response_error = NETAGENT_MESSAGE_ERROR_INVALID_DATA; |
1237 | goto fail; |
1238 | } |
1239 | |
1240 | data_size = netagent_packet_get_netagent_data_size(packet, offset, &error); |
1241 | if (error || data_size < 0 || data_size > NETAGENT_MAX_DATA_SIZE) { |
1242 | NETAGENTLOG(LOG_ERR, "Update message size could not be read, error %d data_size %d" , |
1243 | error, data_size); |
1244 | response_error = NETAGENT_MESSAGE_ERROR_INVALID_DATA; |
1245 | goto fail; |
1246 | } |
1247 | |
1248 | MALLOC(new_wrapper, struct netagent_wrapper *, sizeof(*new_wrapper) + data_size, M_NETAGENT, M_WAITOK); |
1249 | if (new_wrapper == NULL) { |
1250 | NETAGENTLOG0(LOG_ERR, "Failed to allocate agent" ); |
1251 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1252 | goto fail; |
1253 | } |
1254 | |
1255 | memset(new_wrapper, 0, sizeof(*new_wrapper) + data_size); |
1256 | |
1257 | error = mbuf_copydata(packet, offset, sizeof(struct netagent) + data_size, &new_wrapper->netagent); |
1258 | if (error) { |
1259 | NETAGENTLOG(LOG_ERR, "Failed to read data into agent structure: %d" , error); |
1260 | FREE(new_wrapper, M_NETAGENT); |
1261 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1262 | goto fail; |
1263 | } |
1264 | |
1265 | response_error = netagent_handle_update_inner(session, new_wrapper, data_size, &agent_changed , kNetagentErrorDomainUserDefined); |
1266 | if (response_error != 0) { |
1267 | FREE(new_wrapper, M_NETAGENT); |
1268 | goto fail; |
1269 | } |
1270 | |
1271 | netagent_send_success_response(session, NETAGENT_MESSAGE_TYPE_UPDATE, message_id); |
1272 | netagent_post_event(session->wrapper->netagent.netagent_uuid, KEV_NETAGENT_UPDATED, agent_changed); |
1273 | |
1274 | if (agent_changed == FALSE) { |
1275 | // The session wrapper does not need the "new_wrapper" as nothing changed |
1276 | FREE(new_wrapper, M_NETAGENT); |
1277 | } |
1278 | |
1279 | return; |
1280 | fail: |
1281 | netagent_send_error_response(session, NETAGENT_MESSAGE_TYPE_UPDATE, message_id, response_error); |
1282 | } |
1283 | |
1284 | static void |
1285 | netagent_handle_get(struct netagent_session *session, u_int32_t message_id, |
1286 | u_int32_t payload_length, mbuf_t packet, int offset) |
1287 | { |
1288 | #pragma unused(payload_length, packet, offset) |
1289 | u_int8_t *response = NULL; |
1290 | u_int8_t *cursor = NULL; |
1291 | u_int32_t response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1292 | |
1293 | if (session == NULL) { |
1294 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
1295 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1296 | goto fail; |
1297 | } |
1298 | |
1299 | if (session->wrapper == NULL) { |
1300 | NETAGENTLOG0(LOG_ERR, "Session has no agent to get" ); |
1301 | response_error = NETAGENT_MESSAGE_ERROR_NOT_REGISTERED; |
1302 | goto fail; |
1303 | } |
1304 | |
1305 | lck_rw_lock_shared(&netagent_lock); |
1306 | |
1307 | size_t response_size = sizeof(struct netagent_message_header) + sizeof(session->wrapper->netagent) |
1308 | + session->wrapper->netagent.netagent_data_size; |
1309 | MALLOC(response, u_int8_t *, response_size, M_NETAGENT, M_WAITOK); |
1310 | if (response == NULL) { |
1311 | goto fail; |
1312 | } |
1313 | |
1314 | cursor = response; |
1315 | cursor = netagent_buffer_write_message_header(cursor, NETAGENT_MESSAGE_TYPE_GET, |
1316 | NETAGENT_MESSAGE_FLAGS_RESPONSE, message_id, 0, |
1317 | response_size - sizeof(struct netagent_message_header)); |
1318 | memcpy(cursor, &session->wrapper->netagent, sizeof(session->wrapper->netagent) + |
1319 | session->wrapper->netagent.netagent_data_size); |
1320 | |
1321 | lck_rw_done(&netagent_lock); |
1322 | |
1323 | if (!netagent_send_ctl_data(session->control_unit, (u_int8_t *)response, response_size)) { |
1324 | NETAGENTLOG0(LOG_ERR, "Failed to send response" ); |
1325 | } |
1326 | FREE(response, M_NETAGENT); |
1327 | return; |
1328 | fail: |
1329 | netagent_send_error_response(session, NETAGENT_MESSAGE_TYPE_GET, message_id, response_error); |
1330 | } |
1331 | |
1332 | errno_t |
1333 | netagent_assign_nexus(netagent_session_t _session, uuid_t necp_client_uuid, |
1334 | void *assign_message, size_t assigned_results_length) |
1335 | { |
1336 | struct netagent_session *session = (struct netagent_session *)_session; |
1337 | if (session == NULL) { |
1338 | NETAGENTLOG0(LOG_ERR, "Cannot assign nexus from NULL session" ); |
1339 | return EINVAL; |
1340 | } |
1341 | |
1342 | if (session->wrapper == NULL) { |
1343 | NETAGENTLOG0(LOG_ERR, "Session has no agent" ); |
1344 | return ENOENT; |
1345 | } |
1346 | |
1347 | // Note that if the error is 0, NECP has taken over our malloc'ed buffer |
1348 | int error = necp_assign_client_result(session->wrapper->netagent.netagent_uuid, necp_client_uuid, assign_message, assigned_results_length); |
1349 | if (error) { |
1350 | // necp_assign_client_result returns POSIX errors; don't error for ENOENT |
1351 | NETAGENTLOG((error == ENOENT ? LOG_DEBUG : LOG_ERR), "Client assignment failed: %d" , error); |
1352 | return error; |
1353 | } |
1354 | |
1355 | NETAGENTLOG0(LOG_DEBUG, "Agent assigned nexus properties to client" ); |
1356 | return 0; |
1357 | } |
1358 | |
1359 | errno_t |
1360 | netagent_update_flow_protoctl_event(netagent_session_t _session, |
1361 | uuid_t client_id, uint32_t protoctl_event_code, |
1362 | uint32_t protoctl_event_val, uint32_t protoctl_event_tcp_seq_number) |
1363 | { |
1364 | struct netagent_session *session = (struct netagent_session *)_session; |
1365 | int error = 0; |
1366 | |
1367 | if (session == NULL) { |
1368 | NETAGENTLOG0(LOG_ERR, "Cannot assign nexus from NULL session" ); |
1369 | return (EINVAL); |
1370 | } |
1371 | |
1372 | if (session->wrapper == NULL) { |
1373 | NETAGENTLOG0(LOG_ERR, "Session has no agent" ); |
1374 | return (ENOENT); |
1375 | } |
1376 | |
1377 | error = necp_update_flow_protoctl_event(session->wrapper->netagent.netagent_uuid, |
1378 | client_id, protoctl_event_code, protoctl_event_val, protoctl_event_tcp_seq_number); |
1379 | |
1380 | return (error); |
1381 | } |
1382 | |
1383 | static errno_t |
1384 | netagent_handle_assign_nexus_setopt(struct netagent_session *session, u_int8_t *payload, |
1385 | u_int32_t payload_length) |
1386 | { |
1387 | errno_t response_error = 0; |
1388 | struct netagent_assign_nexus_message *assign_nexus_netagent = (struct netagent_assign_nexus_message *)(void *)payload; |
1389 | uuid_t client_id; |
1390 | u_int8_t *assigned_results = NULL; |
1391 | |
1392 | if (session == NULL) { |
1393 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
1394 | response_error = ENOENT; |
1395 | goto done; |
1396 | } |
1397 | |
1398 | if (payload == NULL) { |
1399 | NETAGENTLOG0(LOG_ERR, "No payload received" ); |
1400 | response_error = EINVAL; |
1401 | goto done; |
1402 | } |
1403 | |
1404 | if (session->wrapper == NULL) { |
1405 | NETAGENTLOG0(LOG_ERR, "Session has no agent to get" ); |
1406 | response_error = ENOENT; |
1407 | goto done; |
1408 | } |
1409 | |
1410 | if (payload_length < sizeof(uuid_t)) { |
1411 | NETAGENTLOG0(LOG_ERR, "Assign message is too short" ); |
1412 | response_error = EINVAL; |
1413 | goto done; |
1414 | } |
1415 | |
1416 | memcpy(client_id, assign_nexus_netagent->assign_client_id, sizeof(client_id)); |
1417 | size_t assigned_results_length = (payload_length - sizeof(client_id)); |
1418 | |
1419 | if (assigned_results_length > 0) { |
1420 | MALLOC(assigned_results, u_int8_t *, assigned_results_length, M_NETAGENT, M_WAITOK); |
1421 | if (assigned_results == NULL) { |
1422 | NETAGENTLOG(LOG_ERR, "Failed to allocate assign message (%lu bytes)" , assigned_results_length); |
1423 | response_error = ENOMEM; |
1424 | goto done; |
1425 | } |
1426 | memcpy(assigned_results, assign_nexus_netagent->assign_necp_results, assigned_results_length); |
1427 | } |
1428 | |
1429 | // Note that if the error is 0, NECP has taken over our malloc'ed buffer |
1430 | response_error = necp_assign_client_result(session->wrapper->netagent.netagent_uuid, client_id, assigned_results, assigned_results_length); |
1431 | if (response_error) { |
1432 | // necp_assign_client_result returns POSIX errors |
1433 | if (assigned_results) { |
1434 | FREE(assigned_results, M_NETAGENT); |
1435 | } |
1436 | NETAGENTLOG(LOG_ERR, "Client assignment failed: %d" , response_error); |
1437 | goto done; |
1438 | } |
1439 | |
1440 | NETAGENTLOG0(LOG_DEBUG, "Agent assigned nexus properties to client" ); |
1441 | done: |
1442 | return response_error; |
1443 | } |
1444 | |
1445 | |
1446 | static void |
1447 | netagent_handle_assign_nexus_message(struct netagent_session *session, u_int32_t message_id, |
1448 | u_int32_t payload_length, mbuf_t packet, int offset) |
1449 | { |
1450 | int error = 0; |
1451 | u_int32_t response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1452 | uuid_t client_id; |
1453 | u_int8_t *assigned_results = NULL; |
1454 | |
1455 | if (session == NULL) { |
1456 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
1457 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1458 | goto fail; |
1459 | } |
1460 | |
1461 | if (session->wrapper == NULL) { |
1462 | NETAGENTLOG0(LOG_ERR, "Session has no agent to get" ); |
1463 | response_error = NETAGENT_MESSAGE_ERROR_NOT_REGISTERED; |
1464 | goto fail; |
1465 | } |
1466 | |
1467 | if (payload_length < sizeof(uuid_t)) { |
1468 | NETAGENTLOG0(LOG_ERR, "Assign message is too short" ); |
1469 | response_error = NETAGENT_MESSAGE_ERROR_INVALID_DATA; |
1470 | goto fail; |
1471 | } |
1472 | |
1473 | error = mbuf_copydata(packet, offset, sizeof(client_id), &client_id); |
1474 | if (error) { |
1475 | NETAGENTLOG(LOG_ERR, "Failed to read uuid for assign message: %d" , error); |
1476 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1477 | goto fail; |
1478 | } |
1479 | |
1480 | size_t assigned_results_length = (payload_length - sizeof(client_id)); |
1481 | if (assigned_results_length > 0) { |
1482 | MALLOC(assigned_results, u_int8_t *, assigned_results_length, M_NETAGENT, M_WAITOK); |
1483 | if (assigned_results == NULL) { |
1484 | NETAGENTLOG(LOG_ERR, "Failed to allocate assign message (%lu bytes)" , assigned_results_length); |
1485 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1486 | goto fail; |
1487 | } |
1488 | |
1489 | error = mbuf_copydata(packet, offset + sizeof(client_id), assigned_results_length, assigned_results); |
1490 | if (error) { |
1491 | FREE(assigned_results, M_NETAGENT); |
1492 | NETAGENTLOG(LOG_ERR, "Failed to read assign message: %d" , error); |
1493 | response_error = NETAGENT_MESSAGE_ERROR_INTERNAL; |
1494 | goto fail; |
1495 | } |
1496 | } |
1497 | |
1498 | // Note that if the error is 0, NECP has taken over our malloc'ed buffer |
1499 | error = necp_assign_client_result(session->wrapper->netagent.netagent_uuid, client_id, assigned_results, assigned_results_length); |
1500 | if (error) { |
1501 | if (assigned_results) { |
1502 | FREE(assigned_results, M_NETAGENT); |
1503 | } |
1504 | NETAGENTLOG(LOG_ERR, "Client assignment failed: %d" , error); |
1505 | response_error = NETAGENT_MESSAGE_ERROR_CANNOT_ASSIGN; |
1506 | goto fail; |
1507 | } |
1508 | |
1509 | NETAGENTLOG0(LOG_DEBUG, "Agent assigned nexus properties to client" ); |
1510 | netagent_send_success_response(session, NETAGENT_MESSAGE_TYPE_ASSIGN_NEXUS, message_id); |
1511 | return; |
1512 | fail: |
1513 | netagent_send_error_response(session, NETAGENT_MESSAGE_TYPE_ASSIGN_NEXUS, message_id, response_error); |
1514 | } |
1515 | |
1516 | errno_t |
1517 | netagent_handle_use_count_setopt(struct netagent_session *session, u_int8_t *payload, size_t payload_length) |
1518 | { |
1519 | errno_t response_error = 0; |
1520 | uint64_t use_count = 0; |
1521 | |
1522 | if (session == NULL) { |
1523 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
1524 | response_error = ENOENT; |
1525 | goto done; |
1526 | } |
1527 | |
1528 | if (payload == NULL) { |
1529 | NETAGENTLOG0(LOG_ERR, "No payload received" ); |
1530 | response_error = EINVAL; |
1531 | goto done; |
1532 | } |
1533 | |
1534 | if (payload_length != sizeof(use_count)) { |
1535 | NETAGENTLOG(LOG_ERR, "Payload length is invalid (%lu)" , payload_length); |
1536 | response_error = EINVAL; |
1537 | goto done; |
1538 | } |
1539 | |
1540 | memcpy(&use_count, payload, sizeof(use_count)); |
1541 | |
1542 | lck_rw_lock_shared(&netagent_lock); |
1543 | |
1544 | if (session->wrapper == NULL) { |
1545 | NETAGENTLOG0(LOG_ERR, "Session has no agent registered" ); |
1546 | response_error = ENOENT; |
1547 | lck_rw_done(&netagent_lock); |
1548 | goto done; |
1549 | } |
1550 | |
1551 | session->wrapper->use_count = use_count; |
1552 | |
1553 | lck_rw_done(&netagent_lock); |
1554 | |
1555 | done: |
1556 | return response_error; |
1557 | } |
1558 | |
1559 | errno_t |
1560 | netagent_handle_use_count_getopt(struct netagent_session *session, u_int8_t *buffer, size_t *buffer_length) |
1561 | { |
1562 | errno_t response_error = 0; |
1563 | uint64_t use_count = 0; |
1564 | |
1565 | if (session == NULL) { |
1566 | NETAGENTLOG0(LOG_ERR, "Failed to find session" ); |
1567 | response_error = ENOENT; |
1568 | goto done; |
1569 | } |
1570 | |
1571 | if (buffer == NULL) { |
1572 | NETAGENTLOG0(LOG_ERR, "No payload received" ); |
1573 | response_error = EINVAL; |
1574 | goto done; |
1575 | } |
1576 | |
1577 | if (*buffer_length != sizeof(use_count)) { |
1578 | NETAGENTLOG(LOG_ERR, "Buffer length is invalid (%lu)" , *buffer_length); |
1579 | response_error = EINVAL; |
1580 | goto done; |
1581 | } |
1582 | |
1583 | lck_rw_lock_shared(&netagent_lock); |
1584 | |
1585 | if (session->wrapper == NULL) { |
1586 | NETAGENTLOG0(LOG_ERR, "Session has no agent registered" ); |
1587 | response_error = ENOENT; |
1588 | lck_rw_done(&netagent_lock); |
1589 | goto done; |
1590 | } |
1591 | |
1592 | use_count = session->wrapper->use_count; |
1593 | lck_rw_done(&netagent_lock); |
1594 | |
1595 | memcpy(buffer, &use_count, sizeof(use_count)); |
1596 | *buffer_length = sizeof(use_count); |
1597 | |
1598 | done: |
1599 | return response_error; |
1600 | } |
1601 | |
1602 | static struct netagent_wrapper * |
1603 | netagent_find_agent_with_uuid(uuid_t uuid) |
1604 | { |
1605 | struct netagent_wrapper *search_netagent = NULL; |
1606 | |
1607 | LIST_FOREACH(search_netagent, &master_netagent_list, master_chain) { |
1608 | if (uuid_compare(search_netagent->netagent.netagent_uuid, uuid) == 0) { |
1609 | return (search_netagent); |
1610 | } |
1611 | } |
1612 | |
1613 | return (NULL); |
1614 | } |
1615 | |
1616 | void |
1617 | netagent_post_updated_interfaces(uuid_t uuid) |
1618 | { |
1619 | struct netagent_wrapper *wrapper = NULL; |
1620 | lck_rw_lock_shared(&netagent_lock); |
1621 | wrapper = netagent_find_agent_with_uuid(uuid); |
1622 | lck_rw_done(&netagent_lock); |
1623 | |
1624 | if (wrapper != NULL) { |
1625 | netagent_post_event(uuid, KEV_NETAGENT_UPDATED_INTERFACES, TRUE); |
1626 | } else { |
1627 | NETAGENTLOG0(LOG_DEBUG, "Interface event with no associated agent" ); |
1628 | } |
1629 | |
1630 | return; |
1631 | } |
1632 | |
1633 | static u_int32_t |
1634 | netagent_dump_get_data_size_locked() |
1635 | { |
1636 | struct netagent_wrapper *search_netagent = NULL; |
1637 | u_int32_t total_netagent_data_size = 0; |
1638 | // Traverse the master list to know how much data the client needs to allocate to get the list of agent UUIDs |
1639 | LIST_FOREACH(search_netagent, &master_netagent_list, master_chain) { |
1640 | total_netagent_data_size += sizeof(search_netagent->netagent.netagent_uuid); |
1641 | } |
1642 | return total_netagent_data_size; |
1643 | } |
1644 | |
1645 | static void |
1646 | netagent_dump_copy_data_locked(u_int8_t *buffer, u_int32_t buffer_length) |
1647 | { |
1648 | size_t response_size = 0; |
1649 | u_int8_t *cursor = NULL; |
1650 | struct netagent_wrapper *search_netagent = NULL; |
1651 | |
1652 | response_size = buffer_length; // We already know that buffer_length is the same as total_netagent_data_size. |
1653 | cursor = buffer; |
1654 | LIST_FOREACH(search_netagent, &master_netagent_list, master_chain) { |
1655 | memcpy(cursor, search_netagent->netagent.netagent_uuid, sizeof(search_netagent->netagent.netagent_uuid)); |
1656 | cursor += sizeof(search_netagent->netagent.netagent_uuid); |
1657 | } |
1658 | } |
1659 | |
1660 | int |
1661 | netagent_ioctl(u_long cmd, caddr_t data) |
1662 | { |
1663 | int error = 0; |
1664 | |
1665 | switch (cmd) { |
1666 | case SIOCGIFAGENTLIST32: |
1667 | case SIOCGIFAGENTLIST64: { |
1668 | /* Check entitlement if the client requests agent dump */ |
1669 | errno_t cred_result = priv_check_cred(kauth_cred_get(), PRIV_NET_PRIVILEGED_NECP_POLICIES, 0); |
1670 | if (cred_result != 0) { |
1671 | NETAGENTLOG0(LOG_ERR, "Client does not hold the necessary entitlement to get netagent information" ); |
1672 | return EINVAL; |
1673 | } |
1674 | break; |
1675 | } |
1676 | default: |
1677 | break; |
1678 | } |
1679 | |
1680 | lck_rw_lock_shared(&netagent_lock); |
1681 | switch (cmd) { |
1682 | case SIOCGIFAGENTDATA32: { |
1683 | struct netagent_req32 *ifsir32 = (struct netagent_req32 *)(void *)data; |
1684 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(ifsir32->netagent_uuid); |
1685 | if (wrapper == NULL) { |
1686 | error = ENOENT; |
1687 | break; |
1688 | } |
1689 | uuid_copy(ifsir32->netagent_uuid, wrapper->netagent.netagent_uuid); |
1690 | memcpy(ifsir32->netagent_domain, wrapper->netagent.netagent_domain, sizeof(ifsir32->netagent_domain)); |
1691 | memcpy(ifsir32->netagent_type, wrapper->netagent.netagent_type, sizeof(ifsir32->netagent_type)); |
1692 | memcpy(ifsir32->netagent_desc, wrapper->netagent.netagent_desc, sizeof(ifsir32->netagent_desc)); |
1693 | ifsir32->netagent_flags = wrapper->netagent.netagent_flags; |
1694 | if (ifsir32->netagent_data_size == 0) { |
1695 | // First pass, client wants data size |
1696 | ifsir32->netagent_data_size = wrapper->netagent.netagent_data_size; |
1697 | } else if (ifsir32->netagent_data != USER_ADDR_NULL && |
1698 | ifsir32->netagent_data_size == wrapper->netagent.netagent_data_size) { |
1699 | // Second pass, client wants data buffer filled out |
1700 | error = copyout(wrapper->netagent.netagent_data, ifsir32->netagent_data, wrapper->netagent.netagent_data_size); |
1701 | } else { |
1702 | error = EINVAL; |
1703 | } |
1704 | break; |
1705 | } |
1706 | case SIOCGIFAGENTDATA64: { |
1707 | struct netagent_req64 *ifsir64 = (struct netagent_req64 *)(void *)data; |
1708 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(ifsir64->netagent_uuid); |
1709 | if (wrapper == NULL) { |
1710 | error = ENOENT; |
1711 | break; |
1712 | } |
1713 | uuid_copy(ifsir64->netagent_uuid, wrapper->netagent.netagent_uuid); |
1714 | memcpy(ifsir64->netagent_domain, wrapper->netagent.netagent_domain, sizeof(ifsir64->netagent_domain)); |
1715 | memcpy(ifsir64->netagent_type, wrapper->netagent.netagent_type, sizeof(ifsir64->netagent_type)); |
1716 | memcpy(ifsir64->netagent_desc, wrapper->netagent.netagent_desc, sizeof(ifsir64->netagent_desc)); |
1717 | ifsir64->netagent_flags = wrapper->netagent.netagent_flags; |
1718 | if (ifsir64->netagent_data_size == 0) { |
1719 | // First pass, client wants data size |
1720 | ifsir64->netagent_data_size = wrapper->netagent.netagent_data_size; |
1721 | } else if (ifsir64->netagent_data != USER_ADDR_NULL && |
1722 | ifsir64->netagent_data_size == wrapper->netagent.netagent_data_size) { |
1723 | // Second pass, client wants data buffer filled out |
1724 | error = copyout(wrapper->netagent.netagent_data, ifsir64->netagent_data, wrapper->netagent.netagent_data_size); |
1725 | } else { |
1726 | error = EINVAL; |
1727 | } |
1728 | break; |
1729 | } |
1730 | case SIOCGIFAGENTLIST32: { |
1731 | struct netagentlist_req32 *ifsir32 = (struct netagentlist_req32 *)(void *)data; |
1732 | if (ifsir32->data_size == 0) { |
1733 | // First pass, client wants data size |
1734 | ifsir32->data_size = netagent_dump_get_data_size_locked(); |
1735 | } else if (ifsir32->data != USER_ADDR_NULL && |
1736 | ifsir32->data_size > 0 && |
1737 | ifsir32->data_size == netagent_dump_get_data_size_locked()) { |
1738 | // Second pass, client wants data buffer filled out |
1739 | u_int8_t *response = NULL; |
1740 | MALLOC(response, u_int8_t *, ifsir32->data_size, M_NETAGENT, M_NOWAIT | M_ZERO); |
1741 | if (response == NULL) { |
1742 | error = ENOMEM; |
1743 | break; |
1744 | } |
1745 | |
1746 | netagent_dump_copy_data_locked(response, ifsir32->data_size); |
1747 | error = copyout(response, ifsir32->data, ifsir32->data_size); |
1748 | FREE(response, M_NETAGENT); |
1749 | } else { |
1750 | error = EINVAL; |
1751 | } |
1752 | break; |
1753 | } |
1754 | case SIOCGIFAGENTLIST64: { |
1755 | struct netagentlist_req64 *ifsir64 = (struct netagentlist_req64 *)(void *)data; |
1756 | if (ifsir64->data_size == 0) { |
1757 | // First pass, client wants data size |
1758 | ifsir64->data_size = netagent_dump_get_data_size_locked(); |
1759 | } else if (ifsir64->data != USER_ADDR_NULL && |
1760 | ifsir64->data_size > 0 && |
1761 | ifsir64->data_size == netagent_dump_get_data_size_locked()) { |
1762 | // Second pass, client wants data buffer filled out |
1763 | u_int8_t *response = NULL; |
1764 | MALLOC(response, u_int8_t *, ifsir64->data_size, M_NETAGENT, M_NOWAIT | M_ZERO); |
1765 | if (response == NULL) { |
1766 | error = ENOMEM; |
1767 | break; |
1768 | } |
1769 | |
1770 | netagent_dump_copy_data_locked(response, ifsir64->data_size); |
1771 | error = copyout(response, ifsir64->data, ifsir64->data_size); |
1772 | FREE(response, M_NETAGENT); |
1773 | } else { |
1774 | error = EINVAL; |
1775 | } |
1776 | break; |
1777 | } |
1778 | default: { |
1779 | error = EINVAL; |
1780 | break; |
1781 | } |
1782 | } |
1783 | lck_rw_done(&netagent_lock); |
1784 | return (error); |
1785 | } |
1786 | |
1787 | u_int32_t |
1788 | netagent_get_flags(uuid_t uuid) |
1789 | { |
1790 | u_int32_t flags = 0; |
1791 | lck_rw_lock_shared(&netagent_lock); |
1792 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(uuid); |
1793 | if (wrapper != NULL) { |
1794 | flags = wrapper->netagent.netagent_flags; |
1795 | } else { |
1796 | NETAGENTLOG0(LOG_DEBUG, "Flags requested for invalid netagent" ); |
1797 | } |
1798 | lck_rw_done(&netagent_lock); |
1799 | |
1800 | return (flags); |
1801 | } |
1802 | |
1803 | u_int32_t |
1804 | netagent_get_generation(uuid_t uuid) |
1805 | { |
1806 | u_int32_t generation = 0; |
1807 | lck_rw_lock_shared(&netagent_lock); |
1808 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(uuid); |
1809 | if (wrapper != NULL) { |
1810 | generation = wrapper->generation; |
1811 | } else { |
1812 | NETAGENTLOG0(LOG_DEBUG, "Generation requested for invalid netagent" ); |
1813 | } |
1814 | lck_rw_done(&netagent_lock); |
1815 | |
1816 | return (generation); |
1817 | } |
1818 | |
1819 | bool |
1820 | netagent_get_agent_domain_and_type(uuid_t uuid, char *domain, char *type) |
1821 | { |
1822 | bool found = FALSE; |
1823 | if (domain == NULL || type == NULL) { |
1824 | NETAGENTLOG(LOG_ERR, "Invalid arguments for netagent_get_agent_domain_and_type %p %p" , domain, type); |
1825 | return (FALSE); |
1826 | } |
1827 | |
1828 | lck_rw_lock_shared(&netagent_lock); |
1829 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(uuid); |
1830 | if (wrapper != NULL) { |
1831 | found = TRUE; |
1832 | memcpy(domain, wrapper->netagent.netagent_domain, NETAGENT_DOMAINSIZE); |
1833 | memcpy(type, wrapper->netagent.netagent_type, NETAGENT_TYPESIZE); |
1834 | } else { |
1835 | NETAGENTLOG0(LOG_ERR, "Type requested for invalid netagent" ); |
1836 | } |
1837 | lck_rw_done(&netagent_lock); |
1838 | |
1839 | return (found); |
1840 | } |
1841 | |
1842 | int |
1843 | netagent_kernel_trigger(uuid_t uuid) |
1844 | { |
1845 | int error = 0; |
1846 | |
1847 | lck_rw_lock_shared(&netagent_lock); |
1848 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(uuid); |
1849 | if (wrapper == NULL) { |
1850 | NETAGENTLOG0(LOG_ERR, "Requested netagent for kernel trigger could not be found" ); |
1851 | error = ENOENT; |
1852 | goto done; |
1853 | } |
1854 | |
1855 | if ((wrapper->netagent.netagent_flags & NETAGENT_FLAG_KERNEL_ACTIVATED) == 0) { |
1856 | NETAGENTLOG0(LOG_ERR, "Requested netagent for kernel trigger is not kernel activated" ); |
1857 | // Agent does not accept kernel triggers |
1858 | error = EINVAL; |
1859 | goto done; |
1860 | } |
1861 | |
1862 | if ((wrapper->netagent.netagent_flags & NETAGENT_FLAG_ACTIVE)) { |
1863 | // Agent already active |
1864 | NETAGENTLOG0(LOG_INFO, "Requested netagent for kernel trigger is already active" ); |
1865 | error = 0; |
1866 | goto done; |
1867 | } |
1868 | |
1869 | error = netagent_send_trigger(wrapper, current_proc(), NETAGENT_TRIGGER_FLAG_KERNEL, NETAGENT_MESSAGE_TYPE_TRIGGER); |
1870 | NETAGENTLOG((error ? LOG_ERR : LOG_INFO), "Triggered netagent from kernel (error %d)" , error); |
1871 | done: |
1872 | lck_rw_done(&netagent_lock); |
1873 | return (error); |
1874 | } |
1875 | |
1876 | int |
1877 | netagent_client_message_with_params(uuid_t agent_uuid, |
1878 | uuid_t necp_client_uuid, |
1879 | pid_t pid, |
1880 | void *handle, |
1881 | u_int8_t message_type, |
1882 | struct necp_client_nexus_parameters *parameters, |
1883 | void **assigned_results, |
1884 | size_t *assigned_results_length) |
1885 | { |
1886 | int error = 0; |
1887 | |
1888 | if (message_type != NETAGENT_MESSAGE_TYPE_CLIENT_TRIGGER && |
1889 | message_type != NETAGENT_MESSAGE_TYPE_CLIENT_ASSERT && |
1890 | message_type != NETAGENT_MESSAGE_TYPE_CLIENT_UNASSERT && |
1891 | message_type != NETAGENT_MESSAGE_TYPE_REQUEST_NEXUS && |
1892 | message_type != NETAGENT_MESSAGE_TYPE_CLOSE_NEXUS && |
1893 | message_type != NETAGENT_MESSAGE_TYPE_ABORT_NEXUS) { |
1894 | NETAGENTLOG(LOG_ERR, "Client netagent message type (%d) is invalid" , message_type); |
1895 | return(EINVAL); |
1896 | } |
1897 | |
1898 | lck_rw_lock_shared(&netagent_lock); |
1899 | bool should_unlock = TRUE; |
1900 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(agent_uuid); |
1901 | if (wrapper == NULL) { |
1902 | NETAGENTLOG0(LOG_DEBUG, "Requested netagent for nexus instance could not be found" ); |
1903 | error = ENOENT; |
1904 | goto done; |
1905 | } |
1906 | |
1907 | if (message_type == NETAGENT_MESSAGE_TYPE_CLIENT_TRIGGER) { |
1908 | if ((wrapper->netagent.netagent_flags & NETAGENT_FLAG_USER_ACTIVATED) == 0) { |
1909 | // Agent does not accept user triggers |
1910 | // Don't log, since this is a common case used to trigger events that cellular data is blocked, etc. |
1911 | error = ENOTSUP; |
1912 | |
1913 | |
1914 | pid_t report_pid = 0; |
1915 | uuid_t report_proc_uuid = {}; |
1916 | if (parameters != NULL) { |
1917 | report_pid = parameters->epid; |
1918 | uuid_copy(report_proc_uuid, parameters->euuid); |
1919 | } else { |
1920 | struct proc *p = current_proc(); |
1921 | if (p != NULL) { |
1922 | report_pid = proc_pid(p); |
1923 | proc_getexecutableuuid(p, report_proc_uuid, sizeof(report_proc_uuid)); |
1924 | } |
1925 | } |
1926 | netagent_send_cellular_failed_event(wrapper, report_pid, report_proc_uuid); |
1927 | goto done; |
1928 | } |
1929 | } else if (message_type == NETAGENT_MESSAGE_TYPE_REQUEST_NEXUS || |
1930 | message_type == NETAGENT_MESSAGE_TYPE_CLOSE_NEXUS || |
1931 | message_type == NETAGENT_MESSAGE_TYPE_ABORT_NEXUS) { |
1932 | if ((wrapper->netagent.netagent_flags & NETAGENT_FLAG_NEXUS_PROVIDER) == 0) { |
1933 | NETAGENTLOG0(LOG_ERR, "Requested netagent for nexus instance is not a nexus provider" ); |
1934 | // Agent is not a nexus provider |
1935 | error = EINVAL; |
1936 | goto done; |
1937 | } |
1938 | |
1939 | if ((wrapper->netagent.netagent_flags & NETAGENT_FLAG_ACTIVE) == 0) { |
1940 | // Agent not active |
1941 | NETAGENTLOG0(LOG_INFO, "Requested netagent for nexus instance is not active" ); |
1942 | error = EINVAL; |
1943 | goto done; |
1944 | } |
1945 | } |
1946 | |
1947 | if (wrapper->control_unit == 0) { |
1948 | if (wrapper->event_handler == NULL) { |
1949 | // No event handler registered for kernel agent |
1950 | error = EINVAL; |
1951 | } else { |
1952 | // We hold the shared lock during the event handler callout, so it is expected |
1953 | // that the event handler will not lead to any registrations or unregistrations |
1954 | // of network agents. |
1955 | error = wrapper->event_handler(message_type, necp_client_uuid, pid, handle, |
1956 | wrapper->event_context, parameters, |
1957 | assigned_results, assigned_results_length); |
1958 | if (error != 0) { |
1959 | VERIFY(assigned_results == NULL || *assigned_results == NULL); |
1960 | VERIFY(assigned_results_length == NULL || *assigned_results_length == 0); |
1961 | } |
1962 | } |
1963 | } else { |
1964 | // ABORT_NEXUS is kernel-private, so translate it for userspace nexus |
1965 | if (message_type == NETAGENT_MESSAGE_TYPE_ABORT_NEXUS) { |
1966 | message_type = NETAGENT_MESSAGE_TYPE_CLOSE_NEXUS; |
1967 | } |
1968 | |
1969 | error = netagent_send_client_message(wrapper, necp_client_uuid, message_type); |
1970 | if (error == 0 && message_type == NETAGENT_MESSAGE_TYPE_CLIENT_TRIGGER) { |
1971 | if (lck_rw_lock_shared_to_exclusive(&netagent_lock)) { |
1972 | // Grab the lock exclusively to add a pending client to the list |
1973 | struct netagent_client *new_pending_client = NULL; |
1974 | MALLOC(new_pending_client, struct netagent_client *, sizeof(*new_pending_client), M_NETAGENT, M_WAITOK); |
1975 | if (new_pending_client == NULL) { |
1976 | NETAGENTLOG0(LOG_ERR, "Failed to allocate client for trigger" ); |
1977 | } else { |
1978 | uuid_copy(new_pending_client->client_id, necp_client_uuid); |
1979 | if (parameters != NULL) { |
1980 | new_pending_client->client_pid = parameters->epid; |
1981 | uuid_copy(new_pending_client->client_proc_uuid, parameters->euuid); |
1982 | } else { |
1983 | struct proc *p = current_proc(); |
1984 | if (p != NULL) { |
1985 | new_pending_client->client_pid = proc_pid(p); |
1986 | proc_getexecutableuuid(p, new_pending_client->client_proc_uuid, sizeof(new_pending_client->client_proc_uuid)); |
1987 | } |
1988 | } |
1989 | LIST_INSERT_HEAD(&wrapper->pending_triggers_list, new_pending_client, client_chain); |
1990 | } |
1991 | } else { |
1992 | // If lck_rw_lock_shared_to_exclusive fails, it unlocks automatically |
1993 | should_unlock = FALSE; |
1994 | } |
1995 | } |
1996 | } |
1997 | NETAGENTLOG(((error && error != ENOENT) ? LOG_ERR : LOG_INFO), "Send message %d for client (error %d)" , message_type, error); |
1998 | if (message_type == NETAGENT_MESSAGE_TYPE_CLIENT_TRIGGER) { |
1999 | uuid_string_t uuid_str; |
2000 | uuid_unparse(agent_uuid, uuid_str); |
2001 | NETAGENTLOG(LOG_NOTICE, "Triggered network agent %s, error = %d" , uuid_str, error); |
2002 | } |
2003 | done: |
2004 | if (should_unlock) { |
2005 | lck_rw_done(&netagent_lock); |
2006 | } |
2007 | return (error); |
2008 | } |
2009 | |
2010 | int |
2011 | netagent_client_message(uuid_t agent_uuid, uuid_t necp_client_uuid, pid_t pid, void *handle, u_int8_t message_type) |
2012 | { |
2013 | return (netagent_client_message_with_params(agent_uuid, necp_client_uuid, pid, handle, message_type, NULL, NULL, NULL)); |
2014 | } |
2015 | |
2016 | int |
2017 | netagent_use(uuid_t agent_uuid, uint64_t *out_use_count) |
2018 | { |
2019 | int error = 0; |
2020 | |
2021 | lck_rw_lock_exclusive(&netagent_lock); |
2022 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(agent_uuid); |
2023 | if (wrapper == NULL) { |
2024 | NETAGENTLOG0(LOG_ERR, "netagent_assert: Requested netagent UUID is not registered" ); |
2025 | error = ENOENT; |
2026 | goto done; |
2027 | } |
2028 | |
2029 | uint64_t current_count = wrapper->use_count; |
2030 | wrapper->use_count++; |
2031 | |
2032 | if (out_use_count != NULL) { |
2033 | *out_use_count = current_count; |
2034 | } |
2035 | |
2036 | done: |
2037 | lck_rw_done(&netagent_lock); |
2038 | return (error); |
2039 | } |
2040 | |
2041 | int |
2042 | netagent_copyout(uuid_t agent_uuid, user_addr_t user_addr, u_int32_t user_size) |
2043 | { |
2044 | int error = 0; |
2045 | |
2046 | lck_rw_lock_shared(&netagent_lock); |
2047 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(agent_uuid); |
2048 | if (wrapper == NULL) { |
2049 | NETAGENTLOG0(LOG_DEBUG, "Requested netagent for nexus instance could not be found" ); |
2050 | error = ENOENT; |
2051 | goto done; |
2052 | } |
2053 | |
2054 | u_int32_t total_size = (sizeof(struct netagent) + wrapper->netagent.netagent_data_size); |
2055 | if (user_size < total_size) { |
2056 | NETAGENTLOG(LOG_ERR, "Provided user buffer is too small (%u < %u)" , user_size, total_size); |
2057 | error = EINVAL; |
2058 | goto done; |
2059 | } |
2060 | |
2061 | error = copyout(&wrapper->netagent, user_addr, total_size); |
2062 | |
2063 | NETAGENTLOG((error ? LOG_ERR : LOG_DEBUG), "Copied agent content (error %d)" , error); |
2064 | done: |
2065 | lck_rw_done(&netagent_lock); |
2066 | return (error); |
2067 | } |
2068 | |
2069 | int |
2070 | netagent_trigger(struct proc *p, struct netagent_trigger_args *uap, int32_t *retval) |
2071 | { |
2072 | #pragma unused(p, retval) |
2073 | uuid_t agent_uuid; |
2074 | int error = 0; |
2075 | |
2076 | if (uap == NULL) { |
2077 | NETAGENTLOG0(LOG_ERR, "uap == NULL" ); |
2078 | return (EINVAL); |
2079 | } |
2080 | |
2081 | if (uap->agent_uuid) { |
2082 | if (uap->agent_uuidlen != sizeof(uuid_t)) { |
2083 | NETAGENTLOG(LOG_ERR, "Incorrect length (got %llu, expected %lu)" , |
2084 | uap->agent_uuidlen, sizeof(uuid_t)); |
2085 | return (ERANGE); |
2086 | } |
2087 | |
2088 | error = copyin(uap->agent_uuid, agent_uuid, sizeof(uuid_t)); |
2089 | if (error) { |
2090 | NETAGENTLOG(LOG_ERR, "copyin error (%d)" , error); |
2091 | return (error); |
2092 | } |
2093 | } |
2094 | |
2095 | if (uuid_is_null(agent_uuid)) { |
2096 | NETAGENTLOG0(LOG_ERR, "Requested netagent UUID is empty" ); |
2097 | return (EINVAL); |
2098 | } |
2099 | |
2100 | lck_rw_lock_shared(&netagent_lock); |
2101 | struct netagent_wrapper *wrapper = netagent_find_agent_with_uuid(agent_uuid); |
2102 | if (wrapper == NULL) { |
2103 | NETAGENTLOG0(LOG_ERR, "Requested netagent UUID is not registered" ); |
2104 | error = ENOENT; |
2105 | goto done; |
2106 | } |
2107 | |
2108 | if ((wrapper->netagent.netagent_flags & NETAGENT_FLAG_USER_ACTIVATED) == 0) { |
2109 | // Agent does not accept triggers |
2110 | NETAGENTLOG0(LOG_ERR, "Requested netagent UUID is not eligible for triggering" ); |
2111 | error = ENOTSUP; |
2112 | goto done; |
2113 | } |
2114 | |
2115 | if ((wrapper->netagent.netagent_flags & NETAGENT_FLAG_ACTIVE)) { |
2116 | // Agent already active |
2117 | NETAGENTLOG0(LOG_INFO, "Requested netagent UUID is already active" ); |
2118 | error = 0; |
2119 | goto done; |
2120 | } |
2121 | |
2122 | error = netagent_send_trigger(wrapper, p, NETAGENT_TRIGGER_FLAG_USER, NETAGENT_MESSAGE_TYPE_TRIGGER); |
2123 | NETAGENTLOG((error ? LOG_ERR : LOG_INFO), "Triggered netagent (error %d)" , error); |
2124 | done: |
2125 | lck_rw_done(&netagent_lock); |
2126 | return (error); |
2127 | } |
2128 | |