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1 | /* sockets.c --- wrappers for Windows socket functions |
2 | ||
49114fd4 | 3 | Copyright (C) 2008-2011 Free Software Foundation, Inc. |
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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 Simon Josefsson */ | |
19 | ||
20 | #include <config.h> | |
21 | ||
22 | /* Specification. */ | |
23 | #include "sockets.h" | |
24 | ||
25 | #if WINDOWS_SOCKETS | |
26 | ||
27 | /* This includes winsock2.h on MinGW. */ | |
28 | # include <sys/socket.h> | |
29 | ||
dd7d0148 | 30 | # include "fd-hook.h" |
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31 | |
32 | /* Get set_winsock_errno, FD_TO_SOCKET etc. */ | |
33 | # include "w32sock.h" | |
34 | ||
35 | static int | |
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36 | close_fd_maybe_socket (const struct fd_hook *remaining_list, |
37 | gl_close_fn primary, | |
38 | int fd) | |
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39 | { |
40 | SOCKET sock; | |
41 | WSANETWORKEVENTS ev; | |
42 | ||
43 | /* Test whether fd refers to a socket. */ | |
44 | sock = FD_TO_SOCKET (fd); | |
45 | ev.lNetworkEvents = 0xDEADBEEF; | |
46 | WSAEnumNetworkEvents (sock, NULL, &ev); | |
47 | if (ev.lNetworkEvents != 0xDEADBEEF) | |
48 | { | |
49 | /* fd refers to a socket. */ | |
50 | /* FIXME: other applications, like squid, use an undocumented | |
51 | _free_osfhnd free function. But this is not enough: The 'osfile' | |
52 | flags for fd also needs to be cleared, but it is hard to access it. | |
53 | Instead, here we just close twice the file descriptor. */ | |
54 | if (closesocket (sock)) | |
55 | { | |
56 | set_winsock_errno (); | |
57 | return -1; | |
58 | } | |
59 | else | |
60 | { | |
61 | /* This call frees the file descriptor and does a | |
62 | CloseHandle ((HANDLE) _get_osfhandle (fd)), which fails. */ | |
63 | _close (fd); | |
64 | return 0; | |
65 | } | |
66 | } | |
67 | else | |
68 | /* Some other type of file descriptor. */ | |
dd7d0148 | 69 | return execute_close_hooks (remaining_list, primary, fd); |
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70 | } |
71 | ||
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72 | static int |
73 | ioctl_fd_maybe_socket (const struct fd_hook *remaining_list, | |
74 | gl_ioctl_fn primary, | |
75 | int fd, int request, void *arg) | |
76 | { | |
77 | SOCKET sock; | |
78 | WSANETWORKEVENTS ev; | |
79 | ||
80 | /* Test whether fd refers to a socket. */ | |
81 | sock = FD_TO_SOCKET (fd); | |
82 | ev.lNetworkEvents = 0xDEADBEEF; | |
83 | WSAEnumNetworkEvents (sock, NULL, &ev); | |
84 | if (ev.lNetworkEvents != 0xDEADBEEF) | |
85 | { | |
86 | /* fd refers to a socket. */ | |
87 | if (ioctlsocket (sock, request, arg) < 0) | |
88 | { | |
89 | set_winsock_errno (); | |
90 | return -1; | |
91 | } | |
92 | else | |
93 | return 0; | |
94 | } | |
95 | else | |
96 | /* Some other type of file descriptor. */ | |
97 | return execute_ioctl_hooks (remaining_list, primary, fd, request, arg); | |
98 | } | |
99 | ||
100 | static struct fd_hook fd_sockets_hook; | |
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101 | |
102 | static int initialized_sockets_version /* = 0 */; | |
103 | ||
104 | #endif /* WINDOWS_SOCKETS */ | |
105 | ||
106 | int | |
107 | gl_sockets_startup (int version _GL_UNUSED) | |
108 | { | |
109 | #if WINDOWS_SOCKETS | |
110 | if (version > initialized_sockets_version) | |
111 | { | |
112 | WSADATA data; | |
113 | int err; | |
114 | ||
115 | err = WSAStartup (version, &data); | |
116 | if (err != 0) | |
117 | return 1; | |
118 | ||
119 | if (data.wVersion < version) | |
120 | return 2; | |
121 | ||
122 | if (initialized_sockets_version == 0) | |
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123 | register_fd_hook (close_fd_maybe_socket, ioctl_fd_maybe_socket, |
124 | &fd_sockets_hook); | |
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125 | |
126 | initialized_sockets_version = version; | |
127 | } | |
128 | #endif | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
133 | int | |
134 | gl_sockets_cleanup (void) | |
135 | { | |
136 | #if WINDOWS_SOCKETS | |
137 | int err; | |
138 | ||
139 | initialized_sockets_version = 0; | |
140 | ||
dd7d0148 | 141 | unregister_fd_hook (&fd_sockets_hook); |
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142 | |
143 | err = WSACleanup (); | |
144 | if (err != 0) | |
145 | return 1; | |
146 | #endif | |
147 | ||
148 | return 0; | |
149 | } |