src/win32/winsock.c

   1 /*****************************************************************************
   2  * winsock.c: POSIX replacements for Winsock
   3  *****************************************************************************
   4  * Copyright © 2006-2008 Rémi Denis-Courmont
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <vlc_common.h>
  26 #include <vlc_network.h>
  27
  28 #if 0
  29 ssize_t vlc_sendmsg (int s, struct msghdr *hdr, int flags)
  30 {
  31     /* WSASendMsg would be more straightforward, and would support ancillary
  32      * data, but it's not yet in mingw32. */
  33     if ((hdr->msg_iovlen > 100) || (hdr->msg_controllen > 0))
  34     {
  35         errno = EINVAL;
  36         return -1;
  37     }
  38
  39     WSABUF buf[hdr->msg_iovlen];
  40     for (size_t i = 0; i < sizeof (buf) / sizeof (buf[0]); i++)
  41         buf[i].buf = hdr->msg_iov[i].iov_base,
  42         buf[i].len = hdr->msg_iov[i].iov_len;
  43
  44     DWORD sent;
  45     if (WSASendTo (s, buf, sizeof (buf) / sizeof (buf[0]), &sent, flags,
  46                    hdr->msg_name, hdr->msg_namelen, NULL, NULL) == 0)
  47         return sent;
  48     return -1;
  49 }
  50
  51 ssize_t vlc_recvmsg (int s, struct msghdr *hdr, int flags)
  52 {
  53     /* WSARecvMsg would be more straightforward, and would support ancillary
  54      * data, but it's not yet in mingw32. */
  55     if (hdr->msg_iovlen > 100)
  56     {
  57         errno = EINVAL;
  58         return -1;
  59     }
  60
  61     WSABUF buf[hdr->msg_iovlen];
  62     for (size_t i = 0; i < sizeof (buf) / sizeof (buf[0]); i++)
  63         buf[i].buf = hdr->msg_iov[i].iov_base,
  64         buf[i].len = hdr->msg_iov[i].iov_len;
  65
  66     DWORD recvd, dwFlags = flags;
  67     INT fromlen = hdr->msg_namelen;
  68     hdr->msg_controllen = 0;
  69     hdr->msg_flags = 0;
  70
  71     int ret = WSARecvFrom (s, buf, sizeof (buf) / sizeof (buf[0]), &recvd,
  72                            &dwFlags, hdr->msg_name, &fromlen, NULL, NULL);
  73     hdr->msg_namelen = fromlen;
  74     hdr->msg_flags = dwFlags;
  75     if (ret == 0)
  76         return recvd;
  77
  78 #ifdef MSG_TRUNC
  79     if (WSAGetLastError() == WSAEMSGSIZE)
  80     {
  81         hdr->msg_flags |= MSG_TRUNC;
  82         return recvd;
  83     }
  84 #else
  85 # warning Out-of-date Winsock header files!
  86 #endif
  87     return -1;
  88 }
  89 #endif