93 lines
3.8 KiB
C
93 lines
3.8 KiB
C
/****************************************************************************
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* include/sys/un.h
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYS_UN_H
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#define __INCLUDE_SYS_UN_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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/* The sys/un.> header defines the type sa_family_t as described in
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* sys/socket.h.
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*/
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#include <sys/socket.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* The size of sun_path is not specified. Different implementations us
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* different sizes. BSD4.3 uses a size of 108; BSD4.4 uses a size of 104.
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* Most implementation use a size that ranges from 92 to 108. Applications
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* should not assume a particular length for sun_path.
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*
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* _POSIX_PATH_MAX would be a good choice too.
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*/
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#define UNIX_PATH_MAX 108
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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/* A UNIX domain socket address is represented in the following structure.
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* This structure must be cast compatible with struct sockaddr.
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*/
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struct sockaddr_un
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{
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sa_family_t sun_family; /* AF_UNIX */
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char sun_path[UNIX_PATH_MAX]; /* pathname */
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};
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/* There are three types of addresses:
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*
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* 1. pathname: sun_path holds a null terminated string. The allocated
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* size may be variable: sizeof(sa_family_t) + strlen(pathname) + 1
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* 2. unnamed: A unix socket that is not bound to any name. This case
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* there is no path. The allocated size may be sizeof(sa_family_t)
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* 3. abstract. The abstract path is destinguished because the pathname
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* consists of only the NUL terminator. The allocated size is then
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* sizeof(s_family_t) + 1.
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*/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#endif /* __INCLUDE_SYS_UN_H */
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