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
24 extern ssize_t __recv_chk (int __fd, void *__buf, size_t __n, size_t __buflen,
25 int __flags);
26 extern ssize_t __REDIRECT (__recv_alias, (int __fd, void *__buf, size_t __n,
27 int __flags), recv);
28 extern 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
recv(int __fd,void * __buf,size_t __n,int __flags)35 recv (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
48 extern 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);
52 extern 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);
56 extern 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
recvfrom(int __fd,void * __restrict __buf,size_t __n,int __flags,__SOCKADDR_ARG __addr,socklen_t * __restrict __addr_len)65 recvfrom (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