Line data    Source code

       1             : /* Checking macros for socket functions.
       2             :    Copyright (C) 2005-2022 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, see
      17             :    <https://www.gnu.org/licenses/>.  */
      18             : 
      19             : #ifndef _SYS_SOCKET_H
      20             : # error "Never include <bits/socket2.h> directly; use <sys/socket.h> instead."
      21             : #endif
      22             : 
      23             : extern ssize_t __recv_chk (int __fd, void *__buf, size_t __n, size_t __buflen,
      24             :                            int __flags);
      25             : extern ssize_t __REDIRECT (__recv_alias, (int __fd, void *__buf, size_t __n,
      26             :                                           int __flags), recv);
      27             : extern ssize_t __REDIRECT (__recv_chk_warn,
      28             :                            (int __fd, void *__buf, size_t __n, size_t __buflen,
      29             :                             int __flags), __recv_chk)
      30             :      __warnattr ("recv called with bigger length than size of destination "
      31             :                  "buffer");
      32             : 
      33             : __fortify_function ssize_t
      34       95664 : recv (int __fd, void *__buf, size_t __n, int __flags)
      35             : {
      36       47832 :   size_t sz = __glibc_objsize0 (__buf);
      37       47832 :   if (__glibc_safe_or_unknown_len (__n, sizeof (char), sz))
      38       47832 :     return __recv_alias (__fd, __buf, __n, __flags);
      39           0 :   if (__glibc_unsafe_len (__n, sizeof (char), sz))
      40           0 :     return __recv_chk_warn (__fd, __buf, __n, sz, __flags);
      41           0 :   return __recv_chk (__fd, __buf, __n, sz, __flags);
      42             : }
      43             : 
      44             : extern ssize_t __recvfrom_chk (int __fd, void *__restrict __buf, size_t __n,
      45             :                                size_t __buflen, int __flags,
      46             :                                __SOCKADDR_ARG __addr,
      47             :                                socklen_t *__restrict __addr_len);
      48             : extern ssize_t __REDIRECT (__recvfrom_alias,
      49             :                            (int __fd, void *__restrict __buf, size_t __n,
      50             :                             int __flags, __SOCKADDR_ARG __addr,
      51             :                             socklen_t *__restrict __addr_len), recvfrom);
      52             : extern ssize_t __REDIRECT (__recvfrom_chk_warn,
      53             :                            (int __fd, void *__restrict __buf, size_t __n,
      54             :                             size_t __buflen, int __flags,
      55             :                             __SOCKADDR_ARG __addr,
      56             :                             socklen_t *__restrict __addr_len), __recvfrom_chk)
      57             :      __warnattr ("recvfrom called with bigger length than size of "
      58             :                  "destination buffer");
      59             : 
      60             : __fortify_function ssize_t
      61        4312 : recvfrom (int __fd, void *__restrict __buf, size_t __n, int __flags,
      62             :           __SOCKADDR_ARG __addr, socklen_t *__restrict __addr_len)
      63             : {
      64        2156 :   size_t sz = __glibc_objsize0 (__buf);
      65        2156 :   if (__glibc_safe_or_unknown_len (__n, sizeof (char), sz))
      66        2156 :     return __recvfrom_alias (__fd, __buf, __n, __flags, __addr, __addr_len);
      67           0 :   if (__glibc_unsafe_len (__n, sizeof (char), sz))
      68           0 :     return __recvfrom_chk_warn (__fd, __buf, __n, sz, __flags, __addr,
      69             :                                 __addr_len);
      70           0 :   return __recvfrom_chk (__fd, __buf, __n, sz, __flags, __addr, __addr_len);
      71             : }