1/* Checking macros for socket functions.
2   Copyright (C) 2005, 2007 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Lesser General Public
7   License as published by the Free Software Foundation; either
8   version 2.1 of the License, or (at your option) any later version.
9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, write to the Free
17   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18   02111-1307 USA.  */
19
20#ifndef _SYS_SOCKET_H
21# error "Never include <bits/socket2.h> directly; use <sys/socket.h> instead."
22#endif
23
24extern ssize_t __recv_chk (int __fd, void *__buf, size_t __n, size_t __buflen,
25			   int __flags);
26extern ssize_t __REDIRECT (__recv_alias, (int __fd, void *__buf, size_t __n,
27					  int __flags), recv);
28extern ssize_t __REDIRECT (__recv_chk_warn,
29			   (int __fd, void *__buf, size_t __n, size_t __buflen,
30			    int __flags), __recv_chk)
31     __warnattr ("recv called with bigger length than size of destination "
32		 "buffer");
33
34__extern_always_inline ssize_t
35recv (int __fd, void *__buf, size_t __n, int __flags)
36{
37  if (__bos0 (__buf) != (size_t) -1)
38    {
39      if (!__builtin_constant_p (__n))
40	return __recv_chk (__fd, __buf, __n, __bos0 (__buf), __flags);
41
42      if (__n > __bos0 (__buf))
43	return __recv_chk_warn (__fd, __buf, __n, __bos0 (__buf), __flags);
44    }
45  return __recv_alias (__fd, __buf, __n, __flags);
46}
47
48extern ssize_t __recvfrom_chk (int __fd, void *__restrict __buf, size_t __n,
49			       size_t __buflen, int __flags,
50			       __SOCKADDR_ARG __addr,
51			       socklen_t *__restrict __addr_len);
52extern ssize_t __REDIRECT (__recvfrom_alias,
53			   (int __fd, void *__restrict __buf, size_t __n,
54			    int __flags, __SOCKADDR_ARG __addr,
55			    socklen_t *__restrict __addr_len), recvfrom);
56extern ssize_t __REDIRECT (__recvfrom_chk_warn,
57			   (int __fd, void *__restrict __buf, size_t __n,
58			    size_t __buflen, int __flags,
59			    __SOCKADDR_ARG __addr,
60			    socklen_t *__restrict __addr_len), __recvfrom_chk)
61     __warnattr ("recvfrom called with bigger length than size of "
62		 "destination buffer");
63
64__extern_always_inline ssize_t
65recvfrom (int __fd, void *__restrict __buf, size_t __n, int __flags,
66	  __SOCKADDR_ARG __addr, socklen_t *__restrict __addr_len)
67{
68  if (__bos0 (__buf) != (size_t) -1)
69    {
70      if (!__builtin_constant_p (__n))
71	return __recvfrom_chk (__fd, __buf, __n, __bos0 (__buf), __flags,
72			       __addr, __addr_len);
73      if (__n > __bos0 (__buf))
74	return __recvfrom_chk_warn (__fd, __buf, __n, __bos0 (__buf), __flags,
75				    __addr, __addr_len);
76    }
77  return __recvfrom_alias (__fd, __buf, __n, __flags, __addr, __addr_len);
78}
79