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vlmcsd-svn1065-2016-10-12-Hotbird64
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599 changed files with 72866 additions and 1999 deletions
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/* Declarations of socket constants, types, and functions.
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Copyright (C) 1991-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_SOCKET_H
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#define _SYS_SOCKET_H 1
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#include <features.h>
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__BEGIN_DECLS
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#include <sys/uio.h>
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#define __need_size_t
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#include <stddef.h>
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#ifdef __USE_GNU
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/* Get the __sigset_t definition. */
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# include <bits/sigset.h>
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#endif
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/* This operating system-specific header file defines the SOCK_*, PF_*,
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AF_*, MSG_*, SOL_*, and SO_* constants, and the `struct sockaddr',
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`struct msghdr', and `struct linger' types. */
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#include <bits/socket.h>
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#ifdef __USE_MISC
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/* This is the 4.3 BSD `struct sockaddr' format, which is used as wire
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format in the grotty old 4.3 `talk' protocol. */
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struct osockaddr
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{
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unsigned short int sa_family;
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unsigned char sa_data[14];
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};
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#endif
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/* The following constants should be used for the second parameter of
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`shutdown'. */
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enum
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{
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SHUT_RD = 0, /* No more receptions. */
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#define SHUT_RD SHUT_RD
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SHUT_WR, /* No more transmissions. */
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#define SHUT_WR SHUT_WR
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SHUT_RDWR /* No more receptions or transmissions. */
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#define SHUT_RDWR SHUT_RDWR
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};
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/* This is the type we use for generic socket address arguments.
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With GCC 2.7 and later, the funky union causes redeclarations or
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uses with any of the listed types to be allowed without complaint.
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G++ 2.7 does not support transparent unions so there we want the
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old-style declaration, too. */
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#if defined __cplusplus || !__GNUC_PREREQ (2, 7) || !defined __USE_GNU
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# define __SOCKADDR_ARG struct sockaddr *__restrict
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# define __CONST_SOCKADDR_ARG const struct sockaddr *
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#else
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/* Add more `struct sockaddr_AF' types here as necessary.
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These are all the ones I found on NetBSD and Linux. */
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# define __SOCKADDR_ALLTYPES \
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__SOCKADDR_ONETYPE (sockaddr) \
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__SOCKADDR_ONETYPE (sockaddr_at) \
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__SOCKADDR_ONETYPE (sockaddr_ax25) \
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__SOCKADDR_ONETYPE (sockaddr_dl) \
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__SOCKADDR_ONETYPE (sockaddr_eon) \
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__SOCKADDR_ONETYPE (sockaddr_in) \
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__SOCKADDR_ONETYPE (sockaddr_in6) \
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__SOCKADDR_ONETYPE (sockaddr_inarp) \
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__SOCKADDR_ONETYPE (sockaddr_ipx) \
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__SOCKADDR_ONETYPE (sockaddr_iso) \
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__SOCKADDR_ONETYPE (sockaddr_ns) \
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__SOCKADDR_ONETYPE (sockaddr_un) \
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__SOCKADDR_ONETYPE (sockaddr_x25)
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# define __SOCKADDR_ONETYPE(type) struct type *__restrict __##type##__;
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typedef union { __SOCKADDR_ALLTYPES
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} __SOCKADDR_ARG __attribute__ ((__transparent_union__));
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# undef __SOCKADDR_ONETYPE
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# define __SOCKADDR_ONETYPE(type) const struct type *__restrict __##type##__;
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typedef union { __SOCKADDR_ALLTYPES
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} __CONST_SOCKADDR_ARG __attribute__ ((__transparent_union__));
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# undef __SOCKADDR_ONETYPE
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#endif
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#ifdef __USE_GNU
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/* For `recvmmsg' and `sendmmsg'. */
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struct mmsghdr
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{
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struct msghdr msg_hdr; /* Actual message header. */
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unsigned int msg_len; /* Number of received or sent bytes for the
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entry. */
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};
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#endif
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/* Create a new socket of type TYPE in domain DOMAIN, using
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protocol PROTOCOL. If PROTOCOL is zero, one is chosen automatically.
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Returns a file descriptor for the new socket, or -1 for errors. */
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extern int socket (int __domain, int __type, int __protocol) __THROW;
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/* Create two new sockets, of type TYPE in domain DOMAIN and using
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protocol PROTOCOL, which are connected to each other, and put file
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descriptors for them in FDS[0] and FDS[1]. If PROTOCOL is zero,
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one will be chosen automatically. Returns 0 on success, -1 for errors. */
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extern int socketpair (int __domain, int __type, int __protocol,
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int __fds[2]) __THROW;
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/* Give the socket FD the local address ADDR (which is LEN bytes long). */
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extern int bind (int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len)
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__THROW;
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/* Put the local address of FD into *ADDR and its length in *LEN. */
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extern int getsockname (int __fd, __SOCKADDR_ARG __addr,
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socklen_t *__restrict __len) __THROW;
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/* Open a connection on socket FD to peer at ADDR (which LEN bytes long).
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For connectionless socket types, just set the default address to send to
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and the only address from which to accept transmissions.
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Return 0 on success, -1 for errors.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int connect (int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len);
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/* Put the address of the peer connected to socket FD into *ADDR
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(which is *LEN bytes long), and its actual length into *LEN. */
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extern int getpeername (int __fd, __SOCKADDR_ARG __addr,
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socklen_t *__restrict __len) __THROW;
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/* Send N bytes of BUF to socket FD. Returns the number sent or -1.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern ssize_t send (int __fd, const void *__buf, size_t __n, int __flags);
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/* Read N bytes into BUF from socket FD.
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Returns the number read or -1 for errors.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern ssize_t recv (int __fd, void *__buf, size_t __n, int __flags);
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/* Send N bytes of BUF on socket FD to peer at address ADDR (which is
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ADDR_LEN bytes long). Returns the number sent, or -1 for errors.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern ssize_t sendto (int __fd, const void *__buf, size_t __n,
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int __flags, __CONST_SOCKADDR_ARG __addr,
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socklen_t __addr_len);
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/* Read N bytes into BUF through socket FD.
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If ADDR is not NULL, fill in *ADDR_LEN bytes of it with tha address of
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the sender, and store the actual size of the address in *ADDR_LEN.
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Returns the number of bytes read or -1 for errors.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern ssize_t recvfrom (int __fd, void *__restrict __buf, size_t __n,
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int __flags, __SOCKADDR_ARG __addr,
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socklen_t *__restrict __addr_len);
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/* Send a message described MESSAGE on socket FD.
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Returns the number of bytes sent, or -1 for errors.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern ssize_t sendmsg (int __fd, const struct msghdr *__message,
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int __flags);
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#ifdef __USE_GNU
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/* Send a VLEN messages as described by VMESSAGES to socket FD.
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Returns the number of datagrams successfully written or -1 for errors.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int sendmmsg (int __fd, struct mmsghdr *__vmessages,
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unsigned int __vlen, int __flags);
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#endif
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/* Receive a message as described by MESSAGE from socket FD.
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Returns the number of bytes read or -1 for errors.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern ssize_t recvmsg (int __fd, struct msghdr *__message, int __flags);
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#ifdef __USE_GNU
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/* Receive up to VLEN messages as described by VMESSAGES from socket FD.
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Returns the number of messages received or -1 for errors.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int recvmmsg (int __fd, struct mmsghdr *__vmessages,
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unsigned int __vlen, int __flags,
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struct timespec *__tmo);
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#endif
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/* Put the current value for socket FD's option OPTNAME at protocol level LEVEL
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into OPTVAL (which is *OPTLEN bytes long), and set *OPTLEN to the value's
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actual length. Returns 0 on success, -1 for errors. */
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extern int getsockopt (int __fd, int __level, int __optname,
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void *__restrict __optval,
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socklen_t *__restrict __optlen) __THROW;
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/* Set socket FD's option OPTNAME at protocol level LEVEL
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to *OPTVAL (which is OPTLEN bytes long).
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Returns 0 on success, -1 for errors. */
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extern int setsockopt (int __fd, int __level, int __optname,
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const void *__optval, socklen_t __optlen) __THROW;
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/* Prepare to accept connections on socket FD.
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N connection requests will be queued before further requests are refused.
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Returns 0 on success, -1 for errors. */
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extern int listen (int __fd, int __n) __THROW;
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/* Await a connection on socket FD.
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When a connection arrives, open a new socket to communicate with it,
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set *ADDR (which is *ADDR_LEN bytes long) to the address of the connecting
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peer and *ADDR_LEN to the address's actual length, and return the
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new socket's descriptor, or -1 for errors.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int accept (int __fd, __SOCKADDR_ARG __addr,
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socklen_t *__restrict __addr_len);
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#ifdef __USE_GNU
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/* Similar to 'accept' but takes an additional parameter to specify flags.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int accept4 (int __fd, __SOCKADDR_ARG __addr,
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socklen_t *__restrict __addr_len, int __flags);
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#endif
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/* Shut down all or part of the connection open on socket FD.
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HOW determines what to shut down:
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SHUT_RD = No more receptions;
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SHUT_WR = No more transmissions;
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SHUT_RDWR = No more receptions or transmissions.
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Returns 0 on success, -1 for errors. */
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extern int shutdown (int __fd, int __how) __THROW;
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#ifdef __USE_XOPEN2K
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/* Determine wheter socket is at a out-of-band mark. */
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extern int sockatmark (int __fd) __THROW;
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#endif
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#ifdef __USE_MISC
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/* FDTYPE is S_IFSOCK or another S_IF* macro defined in <sys/stat.h>;
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returns 1 if FD is open on an object of the indicated type, 0 if not,
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or -1 for errors (setting errno). */
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extern int isfdtype (int __fd, int __fdtype) __THROW;
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#endif
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/* Define some macros helping to catch buffer overflows. */
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#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
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# include <bits/socket2.h>
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#endif
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__END_DECLS
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#endif /* sys/socket.h */
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