lib/getsockopt.c

   1 /* getsockopt.c --- wrappers for Windows getsockopt function
   2
   3    Copyright (C) 2008-2011 Free Software Foundation, Inc.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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 <http://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 memcpy. */
  30 #include <string.h>
  31
  32 /* Get set_winsock_errno, FD_TO_SOCKET etc. */
  33 #include "w32sock.h"
  34
  35 #undef getsockopt
  36
  37 int
  38 rpl_getsockopt (int fd, int level, int optname, void *optval, socklen_t *optlen)
  39 {
  40   int r;
  41   SOCKET sock = FD_TO_SOCKET (fd);
  42
  43   if (level == SOL_SOCKET && (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
  44     {
  45       int milliseconds;
  46       int milliseconds_len = sizeof (int);
  47       struct timeval tv;
  48       size_t n;
  49       r = getsockopt (sock, level, optname, (char *) &milliseconds,
  50                       &milliseconds_len);
  51       tv.tv_sec = milliseconds / 1000;
  52       tv.tv_usec = (milliseconds - 1000 * tv.tv_sec) * 1000;
  53       n = sizeof (struct timeval);
  54       if (n > *optlen)
  55         n = *optlen;
  56       memcpy (optval, &tv, n);
  57       *optlen = n;
  58     }
  59   else
  60     {
  61       r = getsockopt (sock, level, optname, optval, optlen);
  62     }
  63
  64   if (r < 0)
  65     set_winsock_errno ();
  66
  67   return r;
  68 }