1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 2008 Apple Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1.  Redistributions of source code must retain the above copyright
11  *     notice, this list of conditions and the following disclaimer.
12  * 2.  Redistributions in binary form must reproduce the above copyright
13  *     notice, this list of conditions and the following disclaimer in the
14  *     documentation and/or other materials provided with the distribution.
15  * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
16  *     its contributors may be used to endorse or promote products derived
17  *     from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR
23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
28  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #include <sys/param.h>
33 #include <sys/socket.h>
34 
35 #include <security/audit/audit.h>
36 
37 #include <bsm/audit_record.h>
38 #include <bsm/audit_socket_type.h>
39 
40 struct bsm_socket_type {
41 	u_short	bst_bsm_socket_type;
42 	int	bst_local_socket_type;
43 };
44 
45 #define	ST_NO_LOCAL_MAPPING	-600
46 
47 static const struct bsm_socket_type bsm_socket_types[] = {
48 	{ BSM_SOCK_DGRAM, SOCK_DGRAM },
49 	{ BSM_SOCK_STREAM, SOCK_STREAM },
50 	{ BSM_SOCK_RAW, SOCK_RAW },
51 	{ BSM_SOCK_RDM, SOCK_RDM },
52 	{ BSM_SOCK_SEQPACKET, SOCK_SEQPACKET },
53 };
54 static const int bsm_socket_types_count = nitems(bsm_socket_types);
55 
56 static const struct bsm_socket_type *
57 bsm_lookup_local_socket_type(int local_socket_type)
58 {
59 	int i;
60 
61 	for (i = 0; i < bsm_socket_types_count; i++) {
62 		if (bsm_socket_types[i].bst_local_socket_type ==
63 		    local_socket_type)
64 			return (&bsm_socket_types[i]);
65 	}
66 	return (NULL);
67 }
68 
69 u_short
70 au_socket_type_to_bsm(int local_socket_type)
71 {
72 	const struct bsm_socket_type *bstp;
73 
74 	bstp = bsm_lookup_local_socket_type(local_socket_type);
75 	if (bstp == NULL)
76 		return (BSM_SOCK_UNKNOWN);
77 	return (bstp->bst_bsm_socket_type);
78 }
79 
80 static const struct bsm_socket_type *
81 bsm_lookup_bsm_socket_type(u_short bsm_socket_type)
82 {
83 	int i;
84 
85 	for (i = 0; i < bsm_socket_types_count; i++) {
86 		if (bsm_socket_types[i].bst_bsm_socket_type ==
87 		    bsm_socket_type)
88 			return (&bsm_socket_types[i]);
89 	}
90 	return (NULL);
91 }
92 
93 int
94 au_bsm_to_socket_type(u_short bsm_socket_type, int *local_socket_typep)
95 {
96 	const struct bsm_socket_type *bstp;
97 
98 	bstp = bsm_lookup_bsm_socket_type(bsm_socket_type);
99 	if (bstp == NULL || bstp->bst_local_socket_type)
100 		return (-1);
101 	*local_socket_typep = bstp->bst_local_socket_type;
102 	return (0);
103 }
104