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 */
33
34#ifndef _SYS_UN_H_
35#define _SYS_UN_H_
36
37#include <sys/cdefs.h>
38#include <sys/_types.h>
39
40#ifndef _SA_FAMILY_T_DECLARED
41typedef	__sa_family_t	sa_family_t;
42#define	_SA_FAMILY_T_DECLARED
43#endif
44
45/*
46 * Historically, (struct sockaddr) needed to fit inside an mbuf.
47 * For this reason, UNIX domain sockets were therefore limited to
48 * 104 bytes. While this limit is no longer necessary, it is kept for
49 * binary compatibility reasons.
50 */
51#define	SUNPATHLEN	104
52
53/*
54 * Definitions for UNIX IPC domain.
55 */
56struct sockaddr_un {
57	unsigned char	sun_len;	/* sockaddr len including null */
58	sa_family_t	sun_family;	/* AF_UNIX */
59	char	sun_path[SUNPATHLEN];	/* path name (gag) */
60};
61
62#if __BSD_VISIBLE
63
64#define	SOL_LOCAL		0	/* Options for local socket */
65
66/* Socket options. */
67#define	LOCAL_PEERCRED		1	/* retrieve peer credentials */
68#define	LOCAL_CREDS		2	/* pass credentials to receiver */
69#define	LOCAL_CREDS_PERSISTENT	3	/* pass credentials to receiver */
70#define	LOCAL_CONNWAIT		4	/* connects block until accepted */
71
72/* Start of reserved space for third-party socket options. */
73#define	LOCAL_VENDOR		SO_VENDOR
74
75#ifndef _KERNEL
76
77/* actual length of an initialized sockaddr_un */
78#define SUN_LEN(su) \
79	(sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
80
81#endif /* !_KERNEL */
82
83#endif /* __BSD_VISIBLE */
84
85#endif /* !_SYS_UN_H_ */