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/cdefs.h>
33__FBSDID("$FreeBSD$");
34
35#include <sys/param.h>
36#include <sys/socket.h>
37
38#include <security/audit/audit.h>
39
40#include <bsm/audit_record.h>
41#include <bsm/audit_socket_type.h>
42
43struct bsm_socket_type {
44	u_short	bst_bsm_socket_type;
45	int	bst_local_socket_type;
46};
47
48#define	ST_NO_LOCAL_MAPPING	-600
49
50static const struct bsm_socket_type bsm_socket_types[] = {
51	{ BSM_SOCK_DGRAM, SOCK_DGRAM },
52	{ BSM_SOCK_STREAM, SOCK_STREAM },
53	{ BSM_SOCK_RAW, SOCK_RAW },
54	{ BSM_SOCK_RDM, SOCK_RDM },
55	{ BSM_SOCK_SEQPACKET, SOCK_SEQPACKET },
56};
57static const int bsm_socket_types_count = nitems(bsm_socket_types);
58
59static const struct bsm_socket_type *
60bsm_lookup_local_socket_type(int local_socket_type)
61{
62	int i;
63
64	for (i = 0; i < bsm_socket_types_count; i++) {
65		if (bsm_socket_types[i].bst_local_socket_type ==
66		    local_socket_type)
67			return (&bsm_socket_types[i]);
68	}
69	return (NULL);
70}
71
72u_short
73au_socket_type_to_bsm(int local_socket_type)
74{
75	const struct bsm_socket_type *bstp;
76
77	bstp = bsm_lookup_local_socket_type(local_socket_type);
78	if (bstp == NULL)
79		return (BSM_SOCK_UNKNOWN);
80	return (bstp->bst_bsm_socket_type);
81}
82
83static const struct bsm_socket_type *
84bsm_lookup_bsm_socket_type(u_short bsm_socket_type)
85{
86	int i;
87
88	for (i = 0; i < bsm_socket_types_count; i++) {
89		if (bsm_socket_types[i].bst_bsm_socket_type ==
90		    bsm_socket_type)
91			return (&bsm_socket_types[i]);
92	}
93	return (NULL);
94}
95
96int
97au_bsm_to_socket_type(u_short bsm_socket_type, int *local_socket_typep)
98{
99	const struct bsm_socket_type *bstp;
100
101	bstp = bsm_lookup_bsm_socket_type(bsm_socket_type);
102	if (bstp == NULL || bstp->bst_local_socket_type)
103		return (-1);
104	*local_socket_typep = bstp->bst_local_socket_type;
105	return (0);
106}
107