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