gnulib/import/setsockopt.c

   1 /* setsockopt.c --- wrappers for Windows setsockopt function
   2
   3    Copyright (C) 2008-2022 Free Software Foundation, Inc.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    This file 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
  13    GNU Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* Written by Paolo Bonzini */
  19
  20 #include <config.h>
  21
  22 #define WIN32_LEAN_AND_MEAN
  23 /* Get winsock2.h. */
  24 #include <sys/socket.h>
  25
  26 /* Get struct timeval. */
  27 #include <sys/time.h>
  28
  29 /* Get set_winsock_errno, FD_TO_SOCKET etc. */
  30 #include "w32sock.h"
  31
  32 #undef setsockopt
  33
  34 int
  35 rpl_setsockopt (int fd, int level, int optname, const void *optval, socklen_t optlen)
  36 {
  37   SOCKET sock = FD_TO_SOCKET (fd);
  38   int r;
  39
  40   if (sock == INVALID_SOCKET)
  41     {
  42       errno = EBADF;
  43       return -1;
  44     }
  45   else
  46     {
  47       if (level == SOL_SOCKET
  48           && (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
  49         {
  50           const struct timeval *tv = optval;
  51           int milliseconds = tv->tv_sec * 1000 + tv->tv_usec / 1000;
  52           optval = &milliseconds;
  53           r = setsockopt (sock, level, optname, optval, sizeof (int));
  54         }
  55       else
  56         {
  57           r = setsockopt (sock, level, optname, optval, optlen);
  58         }
  59
  60       if (r < 0)
  61         set_winsock_errno ();
  62
  63       return r;
  64     }
  65 }