4b8e16d6814f8f64dfb7b69cd5e66f21265348fa
[libav.git] / libavformat / os_support.c
1 /*
2 * Various utilities for ffmpeg system
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 #define _DARWIN_C_SOURCE
26
27 #include "config.h"
28 #include "avformat.h"
29 #include <unistd.h>
30 #include <fcntl.h>
31 #include <sys/time.h>
32 #include "os_support.h"
33
34 #if CONFIG_NETWORK
35 #if !HAVE_POLL_H
36 #if HAVE_WINSOCK2_H
37 #include <winsock2.h>
38 #elif HAVE_SYS_SELECT_H
39 #include <sys/select.h>
40 #endif
41 #endif
42
43 #include "network.h"
44
45 #if !HAVE_INET_ATON
46 #include <stdlib.h>
47 #include <strings.h>
48
49 int ff_inet_aton (const char * str, struct in_addr * add)
50 {
51 unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0;
52
53 if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4)
54 return 0;
55
56 if (!add1 || (add1|add2|add3|add4) > 255) 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
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: ai->ai_protocol = IPPROTO_TCP; break;
129 case SOCK_DGRAM: ai->ai_protocol = IPPROTO_UDP; break;
130 default: ai->ai_protocol = 0; break;
131 }
132
133 ai->ai_addr = (struct sockaddr *)sin;
134 ai->ai_addrlen = sizeof(struct sockaddr_in);
135 if (hints && (hints->ai_flags & AI_CANONNAME))
136 ai->ai_canonname = h ? av_strdup(h->h_name) : NULL;
137
138 ai->ai_next = NULL;
139 return 0;
140 }
141
142 void ff_freeaddrinfo(struct addrinfo *res)
143 {
144 #if HAVE_WINSOCK2_H
145 void (WSAAPI *win_freeaddrinfo)(struct addrinfo *res);
146 HMODULE ws2mod = GetModuleHandle("ws2_32.dll");
147 win_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *res))
148 GetProcAddress(ws2mod, "freeaddrinfo");
149 if (win_freeaddrinfo) {
150 win_freeaddrinfo(res);
151 return;
152 }
153 #endif
154
155 av_free(res->ai_canonname);
156 av_free(res->ai_addr);
157 av_free(res);
158 }
159
160 int ff_getnameinfo(const struct sockaddr *sa, int salen,
161 char *host, int hostlen,
162 char *serv, int servlen, int flags)
163 {
164 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
165
166 #if HAVE_WINSOCK2_H
167 int (WSAAPI *win_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
168 char *host, DWORD hostlen,
169 char *serv, DWORD servlen, int flags);
170 HMODULE ws2mod = GetModuleHandle("ws2_32.dll");
171 win_getnameinfo = GetProcAddress(ws2mod, "getnameinfo");
172 if (win_getnameinfo)
173 return win_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
174 #endif
175
176 if (sa->sa_family != AF_INET)
177 return EAI_FAMILY;
178 if (!host && !serv)
179 return EAI_NONAME;
180
181 if (host && hostlen > 0) {
182 struct hostent *ent = NULL;
183 uint32_t a;
184 if (!(flags & NI_NUMERICHOST))
185 ent = gethostbyaddr((const char *)&sin->sin_addr,
186 sizeof(sin->sin_addr), AF_INET);
187
188 if (ent) {
189 snprintf(host, hostlen, "%s", ent->h_name);
190 } else if (flags & NI_NAMERQD) {
191 return EAI_NONAME;
192 } else {
193 a = ntohl(sin->sin_addr.s_addr);
194 snprintf(host, hostlen, "%d.%d.%d.%d",
195 ((a >> 24) & 0xff), ((a >> 16) & 0xff),
196 ((a >> 8) & 0xff), ( a & 0xff));
197 }
198 }
199
200 if (serv && servlen > 0) {
201 struct servent *ent = NULL;
202 if (!(flags & NI_NUMERICSERV))
203 ent = getservbyport(sin->sin_port, flags & NI_DGRAM ? "udp" : "tcp");
204
205 if (ent) {
206 snprintf(serv, servlen, "%s", ent->s_name);
207 } else
208 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
209 }
210
211 return 0;
212 }
213
214 const char *ff_gai_strerror(int ecode)
215 {
216 switch(ecode) {
217 case EAI_FAIL : return "A non-recoverable error occurred";
218 case EAI_FAMILY : return "The address family was not recognized or the address length was invalid for the specified family";
219 case EAI_NONAME : return "The name does not resolve for the supplied parameters";
220 }
221
222 return "Unknown error";
223 }
224 #endif
225
226 /* resolve host with also IP address parsing */
227 int resolve_host(struct in_addr *sin_addr, const char *hostname)
228 {
229
230 if (!ff_inet_aton(hostname, sin_addr)) {
231 #if HAVE_GETADDRINFO
232 struct addrinfo *ai, *cur;
233 struct addrinfo hints;
234 memset(&hints, 0, sizeof(hints));
235 hints.ai_family = AF_INET;
236 if (getaddrinfo(hostname, NULL, &hints, &ai))
237 return -1;
238 /* getaddrinfo returns a linked list of addrinfo structs.
239 * Even if we set ai_family = AF_INET above, make sure
240 * that the returned one actually is of the correct type. */
241 for (cur = ai; cur; cur = cur->ai_next) {
242 if (cur->ai_family == AF_INET) {
243 *sin_addr = ((struct sockaddr_in *)cur->ai_addr)->sin_addr;
244 freeaddrinfo(ai);
245 return 0;
246 }
247 }
248 freeaddrinfo(ai);
249 return -1;
250 #else
251 struct hostent *hp;
252 hp = gethostbyname(hostname);
253 if (!hp)
254 return -1;
255 memcpy(sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
256 #endif
257 }
258 return 0;
259 }
260
261 int ff_socket_nonblock(int socket, int enable)
262 {
263 #if HAVE_WINSOCK2_H
264 return ioctlsocket(socket, FIONBIO, &enable);
265 #else
266 if (enable)
267 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK);
268 else
269 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK);
270 #endif
271 }
272 #endif /* CONFIG_NETWORK */
273
274 #if CONFIG_FFSERVER
275 #if !HAVE_POLL_H
276 int poll(struct pollfd *fds, nfds_t numfds, int timeout)
277 {
278 fd_set read_set;
279 fd_set write_set;
280 fd_set exception_set;
281 nfds_t i;
282 int n;
283 int rc;
284
285 #if HAVE_WINSOCK2_H
286 if (numfds >= FD_SETSIZE) {
287 errno = EINVAL;
288 return -1;
289 }
290 #endif
291
292 FD_ZERO(&read_set);
293 FD_ZERO(&write_set);
294 FD_ZERO(&exception_set);
295
296 n = -1;
297 for(i = 0; i < numfds; i++) {
298 if (fds[i].fd < 0)
299 continue;
300 #if !HAVE_WINSOCK2_H
301 if (fds[i].fd >= FD_SETSIZE) {
302 errno = EINVAL;
303 return -1;
304 }
305 #endif
306
307 if (fds[i].events & POLLIN) FD_SET(fds[i].fd, &read_set);
308 if (fds[i].events & POLLOUT) FD_SET(fds[i].fd, &write_set);
309 if (fds[i].events & POLLERR) FD_SET(fds[i].fd, &exception_set);
310
311 if (fds[i].fd > n)
312 n = fds[i].fd;
313 };
314
315 if (n == -1)
316 /* Hey!? Nothing to poll, in fact!!! */
317 return 0;
318
319 if (timeout < 0)
320 rc = select(n+1, &read_set, &write_set, &exception_set, NULL);
321 else {
322 struct timeval tv;
323
324 tv.tv_sec = timeout / 1000;
325 tv.tv_usec = 1000 * (timeout % 1000);
326 rc = select(n+1, &read_set, &write_set, &exception_set, &tv);
327 };
328
329 if (rc < 0)
330 return rc;
331
332 for(i = 0; i < (nfds_t) n; i++) {
333 fds[i].revents = 0;
334
335 if (FD_ISSET(fds[i].fd, &read_set)) fds[i].revents |= POLLIN;
336 if (FD_ISSET(fds[i].fd, &write_set)) fds[i].revents |= POLLOUT;
337 if (FD_ISSET(fds[i].fd, &exception_set)) fds[i].revents |= POLLERR;
338 };
339
340 return rc;
341 }
342 #endif /* HAVE_POLL_H */
343 #endif /* CONFIG_FFSERVER */
344