malloc-h: New module.
[gnulib.git] / lib / getsockopt.c
blobbc645cdae0da3d99499df3785e5bd3c58b2247a3
1 /* getsockopt.c --- wrappers for Windows getsockopt function
3 Copyright (C) 2008-2020 Free Software Foundation, Inc.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU 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.
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 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
18 /* Written by Paolo Bonzini */
20 #include <config.h>
22 #define WIN32_LEAN_AND_MEAN
23 /* Get winsock2.h. */
24 #include <sys/socket.h>
26 /* Get struct timeval. */
27 #include <sys/time.h>
29 /* Get memcpy. */
30 #include <string.h>
32 /* Get set_winsock_errno, FD_TO_SOCKET etc. */
33 #include "w32sock.h"
35 #undef getsockopt
37 int
38 rpl_getsockopt (int fd, int level, int optname, void *optval, socklen_t *optlen)
40 SOCKET sock = FD_TO_SOCKET (fd);
42 if (sock == INVALID_SOCKET)
44 errno = EBADF;
45 return -1;
47 else
49 int r;
51 if (level == SOL_SOCKET
52 && (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
54 int milliseconds;
55 int milliseconds_len = sizeof (int);
56 struct timeval tv;
57 size_t n;
59 r = getsockopt (sock, level, optname, (char *) &milliseconds,
60 &milliseconds_len);
61 tv.tv_sec = milliseconds / 1000;
62 tv.tv_usec = (milliseconds - 1000 * tv.tv_sec) * 1000;
63 n = sizeof (struct timeval);
64 if (n > *optlen)
65 n = *optlen;
66 memcpy (optval, &tv, n);
67 *optlen = n;
69 else
71 r = getsockopt (sock, level, optname, optval, optlen);
74 if (r < 0)
75 set_winsock_errno ();
77 return r;