FreeBSD/Linux Kernel Cross Reference
sys/sys/un.h
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1982, 1986, 1993
5 * The Regents of the University of California. 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 the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND 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 THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR 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, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)un.h 8.3 (Berkeley) 2/19/95
32 * $FreeBSD$
33 */
34
35 #ifndef _SYS_UN_H_
36 #define _SYS_UN_H_
37
38 #include <sys/cdefs.h>
39 #include <sys/_types.h>
40
41 #ifndef _SA_FAMILY_T_DECLARED
42 typedef __sa_family_t sa_family_t;
43 #define _SA_FAMILY_T_DECLARED
44 #endif
45
46 /*
47 * Historically, (struct sockaddr) needed to fit inside an mbuf.
48 * For this reason, UNIX domain sockets were therefore limited to
49 * 104 bytes. While this limit is no longer necessary, it is kept for
50 * binary compatibility reasons.
51 */
52 #define SUNPATHLEN 104
53
54 /*
55 * Definitions for UNIX IPC domain.
56 */
57 struct sockaddr_un {
58 unsigned char sun_len; /* sockaddr len including null */
59 sa_family_t sun_family; /* AF_UNIX */
60 char sun_path[SUNPATHLEN]; /* path name (gag) */
61 };
62
63 #if __BSD_VISIBLE
64
65 #define SOL_LOCAL 0 /* Options for local socket */
66
67 /* Socket options. */
68 #define LOCAL_PEERCRED 1 /* retrieve peer credentials */
69 #define LOCAL_CREDS 2 /* pass credentials to receiver */
70 #define LOCAL_CREDS_PERSISTENT 3 /* pass credentials to receiver */
71 #define LOCAL_CONNWAIT 4 /* connects block until accepted */
72
73 /* Start of reserved space for third-party socket options. */
74 #define LOCAL_VENDOR SO_VENDOR
75
76 #ifndef _KERNEL
77
78 /* actual length of an initialized sockaddr_un */
79 #define SUN_LEN(su) \
80 (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
81
82 #endif /* !_KERNEL */
83
84 #endif /* __BSD_VISIBLE */
85
86 #endif /* !_SYS_UN_H_ */
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