The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/un.h

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    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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