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,
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23   * Please see the License for the specific language governing rights and
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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  
37  /* Sandbox-specific calls for task based message filtering */
38  typedef boolean_t (*mach_msg_fetch_filter_policy_cbfunc_t) (struct task *task, void *portlabel,
39      mach_msg_id_t msgid, mach_msg_filter_id *fpid);
40  
41  struct mach_msg_filter_callbacks {
42  	unsigned int version;
43  	const mach_msg_fetch_filter_policy_cbfunc_t fetch_filter_policy;
44  };
45  
46  #define MACH_MSG_FILTER_CALLBACKS_VERSION_0 (0) /* up-to fetch_filter_policy */
47  #define MACH_MSG_FILTER_CALLBACKS_CURRENT MACH_MSG_FILTER_CALLBACKS_VERSION_0
48  
49  __BEGIN_DECLS
50  
51  int mach_msg_filter_register_callback(const struct mach_msg_filter_callbacks *callbacks);
52  
53  __END_DECLS
54  
55  #endif /* KERNEL_PRIVATE */
56  
57  #if XNU_KERNEL_PRIVATE
58  boolean_t mach_msg_fetch_filter_policy(void *portlabel, mach_msg_id_t msgh_id, mach_msg_filter_id *fid);
59  #endif /* XNU_KERNEL_PRIVATE */
60  
61  #endif /* _KERN_MACH_FILTER_H_ */