1 | /* |
2 | * Copyright (c) 2020 Apple Computer, 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 | #ifndef _KERN_MACH_FILTER_H_ |
30 | #define _KERN_MACH_FILTER_H_ |
31 | |
32 | #if KERNEL_PRIVATE |
33 | |
34 | #include <sys/cdefs.h> |
35 | #include <mach/message.h> |
36 | #include <mach/port.h> |
37 | |
38 | /* Sandbox-specific calls for task based message filtering */ |
39 | typedef boolean_t (*mach_msg_fetch_filter_policy_cbfunc_t) (struct task *task, void *portlabel, |
40 | mach_msg_id_t msgid, mach_msg_filter_id *fpid); |
41 | |
42 | typedef kern_return_t (*mach_msg_filter_alloc_service_port_sblabel_cbfunc_t) (mach_service_port_info_t service_port_info, |
43 | void **sblabel); |
44 | |
45 | typedef void (*mach_msg_filter_dealloc_service_port_sblabel_cbfunc_t) (void *sblabel); |
46 | |
47 | typedef void* (*mach_msg_filter_derive_sblabel_from_service_port_cbfunc_t) (void *service_port_sblabel, |
48 | boolean_t *send_side_filtering); |
49 | |
50 | typedef kern_return_t (*mach_msg_filter_get_connection_port_filter_policy_cbfunc_t) (void *service_port_sblabel, |
51 | void *connection_port_sblabel, uint64_t *fpid); |
52 | |
53 | /* Will be called with the port lock held */ |
54 | typedef void (*mach_msg_filter_retain_sblabel_cbfunc_t) (void * sblabel); |
55 | |
56 | struct mach_msg_filter_callbacks { |
57 | unsigned int version; |
58 | /* v0 */ |
59 | const mach_msg_fetch_filter_policy_cbfunc_t fetch_filter_policy; |
60 | |
61 | /* v1 */ |
62 | const mach_msg_filter_alloc_service_port_sblabel_cbfunc_t alloc_service_port_sblabel; |
63 | const mach_msg_filter_dealloc_service_port_sblabel_cbfunc_t dealloc_service_port_sblabel; |
64 | const mach_msg_filter_derive_sblabel_from_service_port_cbfunc_t derive_sblabel_from_service_port; |
65 | const mach_msg_filter_get_connection_port_filter_policy_cbfunc_t get_connection_port_filter_policy; |
66 | const mach_msg_filter_retain_sblabel_cbfunc_t retain_sblabel; |
67 | }; |
68 | |
69 | #define MACH_MSG_FILTER_CALLBACKS_VERSION_0 (0) /* up-to fetch_filter_policy */ |
70 | #define MACH_MSG_FILTER_CALLBACKS_VERSION_1 (1) /* up-to derive_sblabel_from_service_port */ |
71 | #define MACH_MSG_FILTER_CALLBACKS_CURRENT MACH_MSG_FILTER_CALLBACKS_VERSION_1 |
72 | |
73 | __BEGIN_DECLS |
74 | |
75 | int mach_msg_filter_register_callback(const struct mach_msg_filter_callbacks *callbacks); |
76 | |
77 | __END_DECLS |
78 | |
79 | #endif /* KERNEL_PRIVATE */ |
80 | |
81 | #if XNU_KERNEL_PRIVATE |
82 | extern struct mach_msg_filter_callbacks mach_msg_filter_callbacks; |
83 | |
84 | static inline bool __pure2 |
85 | mach_msg_filter_at_least(unsigned int version) |
86 | { |
87 | if (version == 0) { |
88 | /* |
89 | * a non initialized cb struct looks the same as v0 |
90 | * so we need a null check for that one |
91 | */ |
92 | return mach_msg_filter_callbacks.fetch_filter_policy != NULL; |
93 | } |
94 | return mach_msg_filter_callbacks.version >= version; |
95 | } |
96 | |
97 | /* v0 */ |
98 | #define mach_msg_fetch_filter_policy_callback \ |
99 | (mach_msg_filter_callbacks.fetch_filter_policy) |
100 | |
101 | /* v1 */ |
102 | #define mach_msg_filter_alloc_service_port_sblabel_callback \ |
103 | (mach_msg_filter_callbacks.alloc_service_port_sblabel) |
104 | #define mach_msg_filter_dealloc_service_port_sblabel_callback \ |
105 | (mach_msg_filter_callbacks.dealloc_service_port_sblabel) |
106 | #define mach_msg_filter_derive_sblabel_from_service_port_callback \ |
107 | (mach_msg_filter_callbacks.derive_sblabel_from_service_port) |
108 | #define mach_msg_filter_get_connection_port_filter_policy_callback \ |
109 | (mach_msg_filter_callbacks.get_connection_port_filter_policy) |
110 | #define mach_msg_filter_retain_sblabel_callback \ |
111 | (mach_msg_filter_callbacks.retain_sblabel) |
112 | |
113 | extern |
114 | boolean_t mach_msg_fetch_filter_policy(void *portlabel, mach_msg_id_t msgh_id, mach_msg_filter_id *fid); |
115 | #endif /* XNU_KERNEL_PRIVATE */ |
116 | |
117 | #endif /* _KERN_MACH_FILTER_H_ */ |
118 | |