/* Checking macros for socket functions.

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Copyright (C) 2005-2018 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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# error "Never include <bits/socket2.h> directly; use <sys/socket.h> instead."

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#endif

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extern ssize_t __recv_chk (int __fd, void *__buf, size_t __n, size_t __buflen,

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int __flags);

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extern ssize_t __REDIRECT (__recv_alias, (int __fd, void *__buf, size_t __n,

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int __flags), recv);

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extern ssize_t __REDIRECT (__recv_chk_warn,

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(int __fd, void *__buf, size_t __n, size_t __buflen,

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int __flags), __recv_chk)

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__warnattr ("recv called with bigger length than size of destination "

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"buffer");

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__fortify_function ssize_t

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recv (int __fd, void *__buf, size_t __n, int __flags)

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{

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size_t sz = __glibc_objsize0 (__buf);

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if (__glibc_safe_or_unknown_len (__n, sizeof (char), sz))

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return __recv_alias (__fd, __buf, __n, __flags);

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if (__glibc_unsafe_len (__n, sizeof (char), sz))

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return __recv_chk_warn (__fd, __buf, __n, sz, __flags);

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return __recv_chk (__fd, __buf, __n, sz, __flags);

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}

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extern ssize_t __recvfrom_chk (int __fd, void *__restrict __buf, size_t __n,

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size_t __buflen, int __flags,

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__SOCKADDR_ARG __addr,

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socklen_t *__restrict __addr_len);

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extern ssize_t __REDIRECT (__recvfrom_alias,

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(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), recvfrom);

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extern ssize_t __REDIRECT (__recvfrom_chk_warn,

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(int __fd, void *__restrict __buf, size_t __n,

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size_t __buflen, int __flags,

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__SOCKADDR_ARG __addr,

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socklen_t *__restrict __addr_len), __recvfrom_chk)

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__warnattr ("recvfrom called with bigger length than size of "

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"destination buffer");

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__fortify_function ssize_t

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recvfrom (int __fd, void *__restrict __buf, size_t __n, int __flags,

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__SOCKADDR_ARG __addr, socklen_t *__restrict __addr_len)

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{

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size_t sz = __glibc_objsize0 (__buf);

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if (__glibc_safe_or_unknown_len (__n, sizeof (char), sz))

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return __recvfrom_alias (__fd, __buf, __n, __flags, __addr, __addr_len);

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if (__glibc_unsafe_len (__n, sizeof (char), sz))

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return __recvfrom_chk_warn (__fd, __buf, __n, sz, __flags, __addr,

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__addr_len);

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return __recvfrom_chk (__fd, __buf, __n, sz, __flags, __addr, __addr_len);

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}

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