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2ba45a60 DM |
1 | /* |
2 | * various OS-feature replacement utilities | |
3 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard | |
4 | * copyright (c) 2002 Francois Revol | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /* needed by inet_aton() */ | |
24 | #define _SVID_SOURCE | |
25 | ||
26 | #include "config.h" | |
27 | #include "avformat.h" | |
28 | #include "os_support.h" | |
29 | ||
30 | #if CONFIG_NETWORK | |
31 | #include <fcntl.h> | |
32 | #if !HAVE_POLL_H | |
33 | #if HAVE_SYS_TIME_H | |
34 | #include <sys/time.h> | |
35 | #endif /* HAVE_SYS_TIME_H */ | |
36 | #if HAVE_WINSOCK2_H | |
37 | #include <winsock2.h> | |
38 | #elif HAVE_SYS_SELECT_H | |
39 | #include <sys/select.h> | |
40 | #endif /* HAVE_WINSOCK2_H */ | |
41 | #endif /* !HAVE_POLL_H */ | |
42 | ||
43 | #include "network.h" | |
44 | ||
45 | #if !HAVE_INET_ATON | |
46 | #include <stdlib.h> | |
47 | ||
48 | int ff_inet_aton(const char *str, struct in_addr *add) | |
49 | { | |
50 | unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0; | |
51 | ||
52 | if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4) | |
53 | return 0; | |
54 | ||
55 | if (!add1 || (add1 | add2 | add3 | add4) > 255) | |
56 | return 0; | |
57 | ||
58 | add->s_addr = htonl((add1 << 24) + (add2 << 16) + (add3 << 8) + add4); | |
59 | ||
60 | return 1; | |
61 | } | |
62 | #else | |
63 | int ff_inet_aton(const char *str, struct in_addr *add) | |
64 | { | |
65 | return inet_aton(str, add); | |
66 | } | |
67 | #endif /* !HAVE_INET_ATON */ | |
68 | ||
69 | #if !HAVE_GETADDRINFO | |
70 | int ff_getaddrinfo(const char *node, const char *service, | |
71 | const struct addrinfo *hints, struct addrinfo **res) | |
72 | { | |
73 | struct hostent *h = NULL; | |
74 | struct addrinfo *ai; | |
75 | struct sockaddr_in *sin; | |
76 | ||
77 | #if HAVE_WINSOCK2_H | |
78 | int (WSAAPI *win_getaddrinfo)(const char *node, const char *service, | |
79 | const struct addrinfo *hints, | |
80 | struct addrinfo **res); | |
81 | HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); | |
82 | win_getaddrinfo = GetProcAddress(ws2mod, "getaddrinfo"); | |
83 | if (win_getaddrinfo) | |
84 | return win_getaddrinfo(node, service, hints, res); | |
85 | #endif /* HAVE_WINSOCK2_H */ | |
86 | ||
87 | *res = NULL; | |
88 | sin = av_mallocz(sizeof(struct sockaddr_in)); | |
89 | if (!sin) | |
90 | return EAI_FAIL; | |
91 | sin->sin_family = AF_INET; | |
92 | ||
93 | if (node) { | |
94 | if (!ff_inet_aton(node, &sin->sin_addr)) { | |
95 | if (hints && (hints->ai_flags & AI_NUMERICHOST)) { | |
96 | av_free(sin); | |
97 | return EAI_FAIL; | |
98 | } | |
99 | h = gethostbyname(node); | |
100 | if (!h) { | |
101 | av_free(sin); | |
102 | return EAI_FAIL; | |
103 | } | |
104 | memcpy(&sin->sin_addr, h->h_addr_list[0], sizeof(struct in_addr)); | |
105 | } | |
106 | } else { | |
107 | if (hints && (hints->ai_flags & AI_PASSIVE)) | |
108 | sin->sin_addr.s_addr = INADDR_ANY; | |
109 | else | |
110 | sin->sin_addr.s_addr = INADDR_LOOPBACK; | |
111 | } | |
112 | ||
113 | /* Note: getaddrinfo allows service to be a string, which | |
114 | * should be looked up using getservbyname. */ | |
115 | if (service) | |
116 | sin->sin_port = htons(atoi(service)); | |
117 | ||
118 | ai = av_mallocz(sizeof(struct addrinfo)); | |
119 | if (!ai) { | |
120 | av_free(sin); | |
121 | return EAI_FAIL; | |
122 | } | |
123 | ||
124 | *res = ai; | |
125 | ai->ai_family = AF_INET; | |
126 | ai->ai_socktype = hints ? hints->ai_socktype : 0; | |
127 | switch (ai->ai_socktype) { | |
128 | case SOCK_STREAM: | |
129 | ai->ai_protocol = IPPROTO_TCP; | |
130 | break; | |
131 | case SOCK_DGRAM: | |
132 | ai->ai_protocol = IPPROTO_UDP; | |
133 | break; | |
134 | default: | |
135 | ai->ai_protocol = 0; | |
136 | break; | |
137 | } | |
138 | ||
139 | ai->ai_addr = (struct sockaddr *)sin; | |
140 | ai->ai_addrlen = sizeof(struct sockaddr_in); | |
141 | if (hints && (hints->ai_flags & AI_CANONNAME)) | |
142 | ai->ai_canonname = h ? av_strdup(h->h_name) : NULL; | |
143 | ||
144 | ai->ai_next = NULL; | |
145 | return 0; | |
146 | } | |
147 | ||
148 | void ff_freeaddrinfo(struct addrinfo *res) | |
149 | { | |
150 | #if HAVE_WINSOCK2_H | |
151 | void (WSAAPI *win_freeaddrinfo)(struct addrinfo *res); | |
152 | HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); | |
153 | win_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *res)) | |
154 | GetProcAddress(ws2mod, "freeaddrinfo"); | |
155 | if (win_freeaddrinfo) { | |
156 | win_freeaddrinfo(res); | |
157 | return; | |
158 | } | |
159 | #endif /* HAVE_WINSOCK2_H */ | |
160 | ||
161 | av_free(res->ai_canonname); | |
162 | av_free(res->ai_addr); | |
163 | av_free(res); | |
164 | } | |
165 | ||
166 | int ff_getnameinfo(const struct sockaddr *sa, int salen, | |
167 | char *host, int hostlen, | |
168 | char *serv, int servlen, int flags) | |
169 | { | |
170 | const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; | |
171 | ||
172 | #if HAVE_WINSOCK2_H | |
173 | int (WSAAPI *win_getnameinfo)(const struct sockaddr *sa, socklen_t salen, | |
174 | char *host, DWORD hostlen, | |
175 | char *serv, DWORD servlen, int flags); | |
176 | HMODULE ws2mod = GetModuleHandle("ws2_32.dll"); | |
177 | win_getnameinfo = GetProcAddress(ws2mod, "getnameinfo"); | |
178 | if (win_getnameinfo) | |
179 | return win_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags); | |
180 | #endif /* HAVE_WINSOCK2_H */ | |
181 | ||
182 | if (sa->sa_family != AF_INET) | |
183 | return EAI_FAMILY; | |
184 | if (!host && !serv) | |
185 | return EAI_NONAME; | |
186 | ||
187 | if (host && hostlen > 0) { | |
188 | struct hostent *ent = NULL; | |
189 | uint32_t a; | |
190 | if (!(flags & NI_NUMERICHOST)) | |
191 | ent = gethostbyaddr((const char *)&sin->sin_addr, | |
192 | sizeof(sin->sin_addr), AF_INET); | |
193 | ||
194 | if (ent) { | |
195 | snprintf(host, hostlen, "%s", ent->h_name); | |
196 | } else if (flags & NI_NAMERQD) { | |
197 | return EAI_NONAME; | |
198 | } else { | |
199 | a = ntohl(sin->sin_addr.s_addr); | |
200 | snprintf(host, hostlen, "%d.%d.%d.%d", | |
201 | ((a >> 24) & 0xff), ((a >> 16) & 0xff), | |
202 | ((a >> 8) & 0xff), (a & 0xff)); | |
203 | } | |
204 | } | |
205 | ||
206 | if (serv && servlen > 0) { | |
207 | struct servent *ent = NULL; | |
208 | #if HAVE_GETSERVBYPORT | |
209 | if (!(flags & NI_NUMERICSERV)) | |
210 | ent = getservbyport(sin->sin_port, flags & NI_DGRAM ? "udp" : "tcp"); | |
211 | #endif /* HAVE_GETSERVBYPORT */ | |
212 | ||
213 | if (ent) | |
214 | snprintf(serv, servlen, "%s", ent->s_name); | |
215 | else | |
216 | snprintf(serv, servlen, "%d", ntohs(sin->sin_port)); | |
217 | } | |
218 | ||
219 | return 0; | |
220 | } | |
221 | #endif /* !HAVE_GETADDRINFO */ | |
222 | ||
223 | #if !HAVE_GETADDRINFO || HAVE_WINSOCK2_H | |
224 | const char *ff_gai_strerror(int ecode) | |
225 | { | |
226 | switch (ecode) { | |
227 | case EAI_AGAIN: | |
228 | return "Temporary failure in name resolution"; | |
229 | case EAI_BADFLAGS: | |
230 | return "Invalid flags for ai_flags"; | |
231 | case EAI_FAIL: | |
232 | return "A non-recoverable error occurred"; | |
233 | case EAI_FAMILY: | |
234 | return "The address family was not recognized or the address " | |
235 | "length was invalid for the specified family"; | |
236 | case EAI_MEMORY: | |
237 | return "Memory allocation failure"; | |
238 | #if EAI_NODATA != EAI_NONAME | |
239 | case EAI_NODATA: | |
240 | return "No address associated with hostname"; | |
241 | #endif /* EAI_NODATA != EAI_NONAME */ | |
242 | case EAI_NONAME: | |
243 | return "The name does not resolve for the supplied parameters"; | |
244 | case EAI_SERVICE: | |
245 | return "servname not supported for ai_socktype"; | |
246 | case EAI_SOCKTYPE: | |
247 | return "ai_socktype not supported"; | |
248 | } | |
249 | ||
250 | return "Unknown error"; | |
251 | } | |
252 | #endif /* !HAVE_GETADDRINFO || HAVE_WINSOCK2_H */ | |
253 | ||
254 | int ff_socket_nonblock(int socket, int enable) | |
255 | { | |
256 | #if HAVE_WINSOCK2_H | |
257 | u_long param = enable; | |
258 | return ioctlsocket(socket, FIONBIO, ¶m); | |
259 | #else | |
260 | if (enable) | |
261 | return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK); | |
262 | else | |
263 | return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK); | |
264 | #endif /* HAVE_WINSOCK2_H */ | |
265 | } | |
266 | ||
267 | #if !HAVE_POLL_H | |
268 | int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout) | |
269 | { | |
270 | fd_set read_set; | |
271 | fd_set write_set; | |
272 | fd_set exception_set; | |
273 | nfds_t i; | |
274 | int n; | |
275 | int rc; | |
276 | ||
277 | #if HAVE_WINSOCK2_H | |
278 | if (numfds >= FD_SETSIZE) { | |
279 | errno = EINVAL; | |
280 | return -1; | |
281 | } | |
282 | #endif /* HAVE_WINSOCK2_H */ | |
283 | ||
284 | FD_ZERO(&read_set); | |
285 | FD_ZERO(&write_set); | |
286 | FD_ZERO(&exception_set); | |
287 | ||
288 | n = 0; | |
289 | for (i = 0; i < numfds; i++) { | |
290 | if (fds[i].fd < 0) | |
291 | continue; | |
292 | #if !HAVE_WINSOCK2_H | |
293 | if (fds[i].fd >= FD_SETSIZE) { | |
294 | errno = EINVAL; | |
295 | return -1; | |
296 | } | |
297 | #endif /* !HAVE_WINSOCK2_H */ | |
298 | ||
299 | if (fds[i].events & POLLIN) | |
300 | FD_SET(fds[i].fd, &read_set); | |
301 | if (fds[i].events & POLLOUT) | |
302 | FD_SET(fds[i].fd, &write_set); | |
303 | if (fds[i].events & POLLERR) | |
304 | FD_SET(fds[i].fd, &exception_set); | |
305 | ||
306 | if (fds[i].fd >= n) | |
307 | n = fds[i].fd + 1; | |
308 | } | |
309 | ||
310 | if (n == 0) | |
311 | /* Hey!? Nothing to poll, in fact!!! */ | |
312 | return 0; | |
313 | ||
314 | if (timeout < 0) { | |
315 | rc = select(n, &read_set, &write_set, &exception_set, NULL); | |
316 | } else { | |
317 | struct timeval tv; | |
318 | tv.tv_sec = timeout / 1000; | |
319 | tv.tv_usec = 1000 * (timeout % 1000); | |
320 | rc = select(n, &read_set, &write_set, &exception_set, &tv); | |
321 | } | |
322 | ||
323 | if (rc < 0) | |
324 | return rc; | |
325 | ||
326 | for (i = 0; i < numfds; i++) { | |
327 | fds[i].revents = 0; | |
328 | ||
329 | if (FD_ISSET(fds[i].fd, &read_set)) | |
330 | fds[i].revents |= POLLIN; | |
331 | if (FD_ISSET(fds[i].fd, &write_set)) | |
332 | fds[i].revents |= POLLOUT; | |
333 | if (FD_ISSET(fds[i].fd, &exception_set)) | |
334 | fds[i].revents |= POLLERR; | |
335 | } | |
336 | ||
337 | return rc; | |
338 | } | |
339 | #endif /* !HAVE_POLL_H */ | |
340 | ||
341 | #endif /* CONFIG_NETWORK */ |