1 /* getsockopt.c --- wrappers for Windows getsockopt function
2
3 Copyright (C) 2008-2021 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 <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 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
rpl_getsockopt(int fd,int level,int optname,void * optval,socklen_t * optlen)38 rpl_getsockopt (int fd, int level, int optname, void *optval, socklen_t *optlen)
39 {
40 SOCKET sock = FD_TO_SOCKET (fd);
41
42 if (sock == INVALID_SOCKET)
43 {
44 errno = EBADF;
45 return -1;
46 }
47 else
48 {
49 int r;
50
51 if (level == SOL_SOCKET
52 && (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO))
53 {
54 int milliseconds;
55 int milliseconds_len = sizeof (int);
56 struct timeval tv;
57 size_t n;
58
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;
68 }
69 else
70 {
71 r = getsockopt (sock, level, optname, optval, optlen);
72 }
73
74 if (r < 0)
75 set_winsock_errno ();
76
77 return r;
78 }
79 }
80