sysdeps/unix/sysv/linux/setsockopt.c

   1 /* Copyright (C) 2015-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <sys/socket.h>
  19 #include <time.h>
  20 #include <sysdep.h>
  21 #include <socketcall.h>
  22 #include <socket-constants-time64.h>
  23
  24 static int
  25 setsockopt_syscall (int fd, int level, int optname, const void *optval,
  26                     socklen_t len)
  27 {
  28 #ifdef __ASSUME_SETSOCKOPT_SYSCALL
  29   return INLINE_SYSCALL_CALL (setsockopt, fd, level, optname, optval, len);
  30 #else
  31   return SOCKETCALL (setsockopt, fd, level, optname, optval, len);
  32 #endif
  33 }
  34
  35 #ifndef __ASSUME_TIME64_SYSCALLS
  36 static int
  37 setsockopt32 (int fd, int level, int optname, const void *optval,
  38               socklen_t len)
  39 {
  40   int r = -1;
  41
  42   if (level != SOL_SOCKET)
  43     return r;
  44
  45   switch (optname)
  46     {
  47     case COMPAT_SO_RCVTIMEO_NEW:
  48     case COMPAT_SO_SNDTIMEO_NEW:
  49       {
  50         if (len < sizeof (struct __timeval64))
  51           {
  52             __set_errno (EINVAL);
  53             break;
  54           }
  55
  56         struct __timeval64 *tv64 = (struct __timeval64 *) optval;
  57         if (! in_int32_t_range (tv64->tv_sec))
  58           {
  59             __set_errno (EOVERFLOW);
  60             break;
  61           }
  62
  63         if (optname == COMPAT_SO_RCVTIMEO_NEW)
  64           optname = COMPAT_SO_RCVTIMEO_OLD;
  65         if (optname == COMPAT_SO_SNDTIMEO_NEW)
  66           optname = COMPAT_SO_SNDTIMEO_OLD;
  67
  68         struct __timeval32 tv32 = valid_timeval64_to_timeval32 (*tv64);
  69
  70         r = setsockopt_syscall (fd, level, optname, &tv32, sizeof (tv32));
  71       }
  72       break;
  73
  74     case COMPAT_SO_TIMESTAMP_NEW:
  75     case COMPAT_SO_TIMESTAMPNS_NEW:
  76       {
  77         if (optname == COMPAT_SO_TIMESTAMP_NEW)
  78           optname = COMPAT_SO_TIMESTAMP_OLD;
  79         if (optname == COMPAT_SO_TIMESTAMPNS_NEW)
  80           optname = COMPAT_SO_TIMESTAMPNS_OLD;
  81         /* The expected type for the option is an 'int' for both types of
  82            timestamp formats, so there is no need to convert it.  */
  83         r = setsockopt_syscall (fd, level, optname, optval, len);
  84       }
  85       break;
  86     }
  87
  88   return r;
  89 }
  90 #endif
  91
  92 int
  93 __setsockopt (int fd, int level, int optname, const void *optval, socklen_t len)
  94 {
  95   int r = setsockopt_syscall (fd, level, optname, optval, len);
  96
  97 #ifndef __ASSUME_TIME64_SYSCALLS
  98   if (r == -1 && errno == ENOPROTOOPT)
  99     r = setsockopt32 (fd, level, optname, optval, len);
 100 #endif
 101
 102   return r;
 103 }
 104 libc_hidden_def (__setsockopt)
 105 weak_alias (__setsockopt, setsockopt)
 106 #if __TIMESIZE != 64
 107 weak_alias (__setsockopt, __setsockopt64)
 108 #endif