119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/* sockets.c --- wrappers for Windows socket functions
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Copyright (C) 2008-2010 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Simon Josefsson */
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#include <config.h>
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/* Specification. */
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#include "sockets.h"
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#if WINDOWS_SOCKETS
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/* This includes winsock2.h on MinGW. */
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# include <sys/socket.h>
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# include "close-hook.h"
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/* Get set_winsock_errno, FD_TO_SOCKET etc. */
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# include "w32sock.h"
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static int
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close_fd_maybe_socket (int fd, const struct close_hook *remaining_list)
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{
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SOCKET sock;
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WSANETWORKEVENTS ev;
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/* Test whether fd refers to a socket. */
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sock = FD_TO_SOCKET (fd);
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ev.lNetworkEvents = 0xDEADBEEF;
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WSAEnumNetworkEvents (sock, NULL, &ev);
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if (ev.lNetworkEvents != 0xDEADBEEF)
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{
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/* fd refers to a socket. */
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/* FIXME: other applications, like squid, use an undocumented
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_free_osfhnd free function. But this is not enough: The 'osfile'
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flags for fd also needs to be cleared, but it is hard to access it.
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Instead, here we just close twice the file descriptor. */
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if (closesocket (sock))
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{
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set_winsock_errno ();
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return -1;
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}
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else
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{
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/* This call frees the file descriptor and does a
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CloseHandle ((HANDLE) _get_osfhandle (fd)), which fails. */
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_close (fd);
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return 0;
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}
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}
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else
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/* Some other type of file descriptor. */
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return execute_close_hooks (fd, remaining_list);
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}
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static struct close_hook close_sockets_hook;
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static int initialized_sockets_version /* = 0 */;
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#endif /* WINDOWS_SOCKETS */
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int
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gl_sockets_startup (int version _GL_UNUSED)
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{
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#if WINDOWS_SOCKETS
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if (version > initialized_sockets_version)
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{
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WSADATA data;
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int err;
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err = WSAStartup (version, &data);
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if (err != 0)
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return 1;
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if (data.wVersion < version)
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return 2;
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if (initialized_sockets_version == 0)
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register_close_hook (close_fd_maybe_socket, &close_sockets_hook);
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initialized_sockets_version = version;
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}
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#endif
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return 0;
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}
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int
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gl_sockets_cleanup (void)
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{
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#if WINDOWS_SOCKETS
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int err;
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initialized_sockets_version = 0;
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unregister_close_hook (&close_sockets_hook);
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err = WSACleanup ();
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if (err != 0)
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return 1;
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#endif
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return 0;
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}
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