Commit | Line | Data |
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2ba45a60 DM |
1 | /* |
2 | * UDP prototype streaming system | |
3 | * Copyright (c) 2000, 2001, 2002 Fabrice Bellard | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | /** | |
23 | * @file | |
24 | * UDP protocol | |
25 | */ | |
26 | ||
27 | #define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */ | |
28 | ||
29 | #include "avformat.h" | |
30 | #include "avio_internal.h" | |
31 | #include "libavutil/parseutils.h" | |
32 | #include "libavutil/fifo.h" | |
33 | #include "libavutil/intreadwrite.h" | |
34 | #include "libavutil/avstring.h" | |
35 | #include "libavutil/opt.h" | |
36 | #include "libavutil/log.h" | |
37 | #include "libavutil/time.h" | |
38 | #include "internal.h" | |
39 | #include "network.h" | |
40 | #include "os_support.h" | |
41 | #include "url.h" | |
42 | ||
f6fa7814 DM |
43 | #if HAVE_UDPLITE_H |
44 | #include "udplite.h" | |
45 | #else | |
46 | /* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite. | |
47 | * So, we provide a fallback here. | |
48 | */ | |
49 | #define UDPLITE_SEND_CSCOV 10 | |
50 | #define UDPLITE_RECV_CSCOV 11 | |
51 | #endif | |
52 | ||
53 | #ifndef IPPROTO_UDPLITE | |
54 | #define IPPROTO_UDPLITE 136 | |
55 | #endif | |
56 | ||
2ba45a60 DM |
57 | #if HAVE_PTHREAD_CANCEL |
58 | #include <pthread.h> | |
59 | #endif | |
60 | ||
61 | #ifndef HAVE_PTHREAD_CANCEL | |
62 | #define HAVE_PTHREAD_CANCEL 0 | |
63 | #endif | |
64 | ||
65 | #ifndef IPV6_ADD_MEMBERSHIP | |
66 | #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP | |
67 | #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP | |
68 | #endif | |
69 | ||
70 | #define UDP_TX_BUF_SIZE 32768 | |
71 | #define UDP_MAX_PKT_SIZE 65536 | |
f6fa7814 | 72 | #define UDP_HEADER_SIZE 8 |
2ba45a60 DM |
73 | |
74 | typedef struct { | |
75 | const AVClass *class; | |
76 | int udp_fd; | |
77 | int ttl; | |
f6fa7814 | 78 | int udplite_coverage; |
2ba45a60 DM |
79 | int buffer_size; |
80 | int is_multicast; | |
81 | int is_broadcast; | |
82 | int local_port; | |
83 | int reuse_socket; | |
84 | int overrun_nonfatal; | |
85 | struct sockaddr_storage dest_addr; | |
86 | int dest_addr_len; | |
87 | int is_connected; | |
88 | ||
89 | /* Circular Buffer variables for use in UDP receive code */ | |
90 | int circular_buffer_size; | |
91 | AVFifoBuffer *fifo; | |
92 | int circular_buffer_error; | |
93 | #if HAVE_PTHREAD_CANCEL | |
94 | pthread_t circular_buffer_thread; | |
95 | pthread_mutex_t mutex; | |
96 | pthread_cond_t cond; | |
97 | int thread_started; | |
98 | #endif | |
99 | uint8_t tmp[UDP_MAX_PKT_SIZE+4]; | |
100 | int remaining_in_dg; | |
101 | char *local_addr; | |
102 | int packet_size; | |
103 | int timeout; | |
104 | struct sockaddr_storage local_addr_storage; | |
105 | } UDPContext; | |
106 | ||
107 | #define OFFSET(x) offsetof(UDPContext, x) | |
108 | #define D AV_OPT_FLAG_DECODING_PARAM | |
109 | #define E AV_OPT_FLAG_ENCODING_PARAM | |
110 | static const AVOption options[] = { | |
111 | {"buffer_size", "set packet buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, | |
112 | {"localport", "set local port to bind to", OFFSET(local_port), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, | |
113 | {"localaddr", "choose local IP address", OFFSET(local_addr), AV_OPT_TYPE_STRING, {.str = ""}, 0, 0, D|E }, | |
f6fa7814 | 114 | {"udplite_coverage", "choose UDPLite head size which should be validated by checksum", OFFSET(udplite_coverage), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D|E }, |
2ba45a60 DM |
115 | {"pkt_size", "set size of UDP packets", OFFSET(packet_size), AV_OPT_TYPE_INT, {.i64 = 1472}, 0, INT_MAX, D|E }, |
116 | {"reuse", "explicitly allow or disallow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, | |
117 | {"broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E }, | |
118 | {"ttl", "set the time to live value (for multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, {.i64 = 16}, 0, INT_MAX, E }, | |
119 | {"connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, | |
120 | /* TODO 'sources', 'block' option */ | |
121 | {"fifo_size", "set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size), AV_OPT_TYPE_INT, {.i64 = 7*4096}, 0, INT_MAX, D }, | |
122 | {"overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D }, | |
123 | {"timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D }, | |
124 | {NULL} | |
125 | }; | |
126 | ||
127 | static const AVClass udp_context_class = { | |
128 | .class_name = "udp", | |
129 | .item_name = av_default_item_name, | |
130 | .option = options, | |
131 | .version = LIBAVUTIL_VERSION_INT, | |
132 | }; | |
133 | ||
f6fa7814 DM |
134 | static const AVClass udplite_context_class = { |
135 | .class_name = "udplite", | |
136 | .item_name = av_default_item_name, | |
137 | .option = options, | |
138 | .version = LIBAVUTIL_VERSION_INT, | |
139 | }; | |
140 | ||
2ba45a60 DM |
141 | static void log_net_error(void *ctx, int level, const char* prefix) |
142 | { | |
143 | char errbuf[100]; | |
144 | av_strerror(ff_neterrno(), errbuf, sizeof(errbuf)); | |
145 | av_log(ctx, level, "%s: %s\n", prefix, errbuf); | |
146 | } | |
147 | ||
148 | static int udp_set_multicast_ttl(int sockfd, int mcastTTL, | |
149 | struct sockaddr *addr) | |
150 | { | |
151 | #ifdef IP_MULTICAST_TTL | |
152 | if (addr->sa_family == AF_INET) { | |
153 | if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) { | |
154 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)"); | |
155 | return -1; | |
156 | } | |
157 | } | |
158 | #endif | |
159 | #if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS) | |
160 | if (addr->sa_family == AF_INET6) { | |
161 | if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) { | |
162 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)"); | |
163 | return -1; | |
164 | } | |
165 | } | |
166 | #endif | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr) | |
171 | { | |
172 | #ifdef IP_ADD_MEMBERSHIP | |
173 | if (addr->sa_family == AF_INET) { | |
174 | struct ip_mreq mreq; | |
175 | ||
176 | mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; | |
177 | if (local_addr) | |
178 | mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr; | |
179 | else | |
180 | mreq.imr_interface.s_addr= INADDR_ANY; | |
181 | if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { | |
182 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)"); | |
183 | return -1; | |
184 | } | |
185 | } | |
186 | #endif | |
187 | #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6) | |
188 | if (addr->sa_family == AF_INET6) { | |
189 | struct ipv6_mreq mreq6; | |
190 | ||
191 | memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr)); | |
192 | mreq6.ipv6mr_interface= 0; | |
193 | if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) { | |
194 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)"); | |
195 | return -1; | |
196 | } | |
197 | } | |
198 | #endif | |
199 | return 0; | |
200 | } | |
201 | ||
202 | static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr) | |
203 | { | |
204 | #ifdef IP_DROP_MEMBERSHIP | |
205 | if (addr->sa_family == AF_INET) { | |
206 | struct ip_mreq mreq; | |
207 | ||
208 | mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; | |
209 | if (local_addr) | |
210 | mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr; | |
211 | else | |
212 | mreq.imr_interface.s_addr= INADDR_ANY; | |
213 | if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) { | |
214 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)"); | |
215 | return -1; | |
216 | } | |
217 | } | |
218 | #endif | |
219 | #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6) | |
220 | if (addr->sa_family == AF_INET6) { | |
221 | struct ipv6_mreq mreq6; | |
222 | ||
223 | memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr)); | |
224 | mreq6.ipv6mr_interface= 0; | |
225 | if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) { | |
226 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)"); | |
227 | return -1; | |
228 | } | |
229 | } | |
230 | #endif | |
231 | return 0; | |
232 | } | |
233 | ||
234 | static struct addrinfo* udp_resolve_host(const char *hostname, int port, | |
235 | int type, int family, int flags) | |
236 | { | |
237 | struct addrinfo hints = { 0 }, *res = 0; | |
238 | int error; | |
239 | char sport[16]; | |
240 | const char *node = 0, *service = "0"; | |
241 | ||
242 | if (port > 0) { | |
243 | snprintf(sport, sizeof(sport), "%d", port); | |
244 | service = sport; | |
245 | } | |
246 | if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) { | |
247 | node = hostname; | |
248 | } | |
249 | hints.ai_socktype = type; | |
250 | hints.ai_family = family; | |
251 | hints.ai_flags = flags; | |
252 | if ((error = getaddrinfo(node, service, &hints, &res))) { | |
253 | res = NULL; | |
254 | av_log(NULL, AV_LOG_ERROR, "udp_resolve_host: %s\n", gai_strerror(error)); | |
255 | } | |
256 | ||
257 | return res; | |
258 | } | |
259 | ||
260 | static int udp_set_multicast_sources(int sockfd, struct sockaddr *addr, | |
261 | int addr_len, char **sources, | |
262 | int nb_sources, int include) | |
263 | { | |
264 | #if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32) | |
265 | /* These ones are available in the microsoft SDK, but don't seem to work | |
266 | * as on linux, so just prefer the v4-only approach there for now. */ | |
267 | int i; | |
268 | for (i = 0; i < nb_sources; i++) { | |
269 | struct group_source_req mreqs; | |
270 | int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6; | |
271 | struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0, | |
272 | SOCK_DGRAM, AF_UNSPEC, | |
273 | 0); | |
274 | if (!sourceaddr) | |
275 | return AVERROR(ENOENT); | |
276 | ||
277 | mreqs.gsr_interface = 0; | |
278 | memcpy(&mreqs.gsr_group, addr, addr_len); | |
279 | memcpy(&mreqs.gsr_source, sourceaddr->ai_addr, sourceaddr->ai_addrlen); | |
280 | freeaddrinfo(sourceaddr); | |
281 | ||
282 | if (setsockopt(sockfd, level, | |
283 | include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE, | |
284 | (const void *)&mreqs, sizeof(mreqs)) < 0) { | |
285 | if (include) | |
286 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)"); | |
287 | else | |
288 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)"); | |
289 | return ff_neterrno(); | |
290 | } | |
291 | } | |
292 | #elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE) | |
293 | int i; | |
294 | if (addr->sa_family != AF_INET) { | |
295 | av_log(NULL, AV_LOG_ERROR, | |
296 | "Setting multicast sources only supported for IPv4\n"); | |
297 | return AVERROR(EINVAL); | |
298 | } | |
299 | for (i = 0; i < nb_sources; i++) { | |
300 | struct ip_mreq_source mreqs; | |
301 | struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0, | |
302 | SOCK_DGRAM, AF_UNSPEC, | |
303 | 0); | |
304 | if (!sourceaddr) | |
305 | return AVERROR(ENOENT); | |
306 | if (sourceaddr->ai_addr->sa_family != AF_INET) { | |
307 | freeaddrinfo(sourceaddr); | |
308 | av_log(NULL, AV_LOG_ERROR, "%s is of incorrect protocol family\n", | |
309 | sources[i]); | |
310 | return AVERROR(EINVAL); | |
311 | } | |
312 | ||
313 | mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr; | |
314 | mreqs.imr_interface.s_addr = INADDR_ANY; | |
315 | mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)sourceaddr->ai_addr)->sin_addr.s_addr; | |
316 | freeaddrinfo(sourceaddr); | |
317 | ||
318 | if (setsockopt(sockfd, IPPROTO_IP, | |
319 | include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE, | |
320 | (const void *)&mreqs, sizeof(mreqs)) < 0) { | |
321 | if (include) | |
322 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)"); | |
323 | else | |
324 | log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)"); | |
325 | return ff_neterrno(); | |
326 | } | |
327 | } | |
328 | #else | |
329 | return AVERROR(ENOSYS); | |
330 | #endif | |
331 | return 0; | |
332 | } | |
333 | static int udp_set_url(struct sockaddr_storage *addr, | |
334 | const char *hostname, int port) | |
335 | { | |
336 | struct addrinfo *res0; | |
337 | int addr_len; | |
338 | ||
339 | res0 = udp_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0); | |
340 | if (!res0) return AVERROR(EIO); | |
341 | memcpy(addr, res0->ai_addr, res0->ai_addrlen); | |
342 | addr_len = res0->ai_addrlen; | |
343 | freeaddrinfo(res0); | |
344 | ||
345 | return addr_len; | |
346 | } | |
347 | ||
348 | static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr, | |
349 | socklen_t *addr_len, const char *localaddr) | |
350 | { | |
351 | int udp_fd = -1; | |
352 | struct addrinfo *res0, *res; | |
353 | int family = AF_UNSPEC; | |
354 | ||
355 | if (((struct sockaddr *) &s->dest_addr)->sa_family) | |
356 | family = ((struct sockaddr *) &s->dest_addr)->sa_family; | |
357 | res0 = udp_resolve_host(localaddr[0] ? localaddr : NULL, s->local_port, | |
358 | SOCK_DGRAM, family, AI_PASSIVE); | |
359 | if (!res0) | |
360 | goto fail; | |
361 | for (res = res0; res; res=res->ai_next) { | |
f6fa7814 DM |
362 | if (s->udplite_coverage) |
363 | udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE); | |
364 | else | |
365 | udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0); | |
2ba45a60 DM |
366 | if (udp_fd != -1) break; |
367 | log_net_error(NULL, AV_LOG_ERROR, "socket"); | |
368 | } | |
369 | ||
370 | if (udp_fd < 0) | |
371 | goto fail; | |
372 | ||
373 | memcpy(addr, res->ai_addr, res->ai_addrlen); | |
374 | *addr_len = res->ai_addrlen; | |
375 | ||
376 | freeaddrinfo(res0); | |
377 | ||
378 | return udp_fd; | |
379 | ||
380 | fail: | |
381 | if (udp_fd >= 0) | |
382 | closesocket(udp_fd); | |
383 | if(res0) | |
384 | freeaddrinfo(res0); | |
385 | return -1; | |
386 | } | |
387 | ||
388 | static int udp_port(struct sockaddr_storage *addr, int addr_len) | |
389 | { | |
390 | char sbuf[sizeof(int)*3+1]; | |
391 | int error; | |
392 | ||
393 | if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) { | |
394 | av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error)); | |
395 | return -1; | |
396 | } | |
397 | ||
398 | return strtol(sbuf, NULL, 10); | |
399 | } | |
400 | ||
401 | ||
402 | /** | |
403 | * If no filename is given to av_open_input_file because you want to | |
404 | * get the local port first, then you must call this function to set | |
405 | * the remote server address. | |
406 | * | |
407 | * url syntax: udp://host:port[?option=val...] | |
408 | * option: 'ttl=n' : set the ttl value (for multicast only) | |
409 | * 'localport=n' : set the local port | |
410 | * 'pkt_size=n' : set max packet size | |
411 | * 'reuse=1' : enable reusing the socket | |
412 | * 'overrun_nonfatal=1': survive in case of circular buffer overrun | |
413 | * | |
414 | * @param h media file context | |
415 | * @param uri of the remote server | |
416 | * @return zero if no error. | |
417 | */ | |
418 | int ff_udp_set_remote_url(URLContext *h, const char *uri) | |
419 | { | |
420 | UDPContext *s = h->priv_data; | |
421 | char hostname[256], buf[10]; | |
422 | int port; | |
423 | const char *p; | |
424 | ||
425 | av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); | |
426 | ||
427 | /* set the destination address */ | |
428 | s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port); | |
429 | if (s->dest_addr_len < 0) { | |
430 | return AVERROR(EIO); | |
431 | } | |
432 | s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr); | |
433 | p = strchr(uri, '?'); | |
434 | if (p) { | |
435 | if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { | |
436 | int was_connected = s->is_connected; | |
437 | s->is_connected = strtol(buf, NULL, 10); | |
438 | if (s->is_connected && !was_connected) { | |
439 | if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr, | |
440 | s->dest_addr_len)) { | |
441 | s->is_connected = 0; | |
442 | log_net_error(h, AV_LOG_ERROR, "connect"); | |
443 | return AVERROR(EIO); | |
444 | } | |
445 | } | |
446 | } | |
447 | } | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
452 | /** | |
453 | * Return the local port used by the UDP connection | |
454 | * @param h media file context | |
455 | * @return the local port number | |
456 | */ | |
457 | int ff_udp_get_local_port(URLContext *h) | |
458 | { | |
459 | UDPContext *s = h->priv_data; | |
460 | return s->local_port; | |
461 | } | |
462 | ||
463 | /** | |
464 | * Return the udp file handle for select() usage to wait for several RTP | |
465 | * streams at the same time. | |
466 | * @param h media file context | |
467 | */ | |
468 | static int udp_get_file_handle(URLContext *h) | |
469 | { | |
470 | UDPContext *s = h->priv_data; | |
471 | return s->udp_fd; | |
472 | } | |
473 | ||
474 | #if HAVE_PTHREAD_CANCEL | |
475 | static void *circular_buffer_task( void *_URLContext) | |
476 | { | |
477 | URLContext *h = _URLContext; | |
478 | UDPContext *s = h->priv_data; | |
479 | int old_cancelstate; | |
480 | ||
481 | pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); | |
482 | pthread_mutex_lock(&s->mutex); | |
483 | if (ff_socket_nonblock(s->udp_fd, 0) < 0) { | |
484 | av_log(h, AV_LOG_ERROR, "Failed to set blocking mode"); | |
485 | s->circular_buffer_error = AVERROR(EIO); | |
486 | goto end; | |
487 | } | |
488 | while(1) { | |
489 | int len; | |
490 | ||
491 | pthread_mutex_unlock(&s->mutex); | |
492 | /* Blocking operations are always cancellation points; | |
493 | see "General Information" / "Thread Cancelation Overview" | |
494 | in Single Unix. */ | |
495 | pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate); | |
496 | len = recv(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0); | |
497 | pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate); | |
498 | pthread_mutex_lock(&s->mutex); | |
499 | if (len < 0) { | |
500 | if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) { | |
501 | s->circular_buffer_error = ff_neterrno(); | |
502 | goto end; | |
503 | } | |
504 | continue; | |
505 | } | |
506 | AV_WL32(s->tmp, len); | |
507 | ||
508 | if(av_fifo_space(s->fifo) < len + 4) { | |
509 | /* No Space left */ | |
510 | if (s->overrun_nonfatal) { | |
511 | av_log(h, AV_LOG_WARNING, "Circular buffer overrun. " | |
512 | "Surviving due to overrun_nonfatal option\n"); | |
513 | continue; | |
514 | } else { | |
515 | av_log(h, AV_LOG_ERROR, "Circular buffer overrun. " | |
516 | "To avoid, increase fifo_size URL option. " | |
517 | "To survive in such case, use overrun_nonfatal option\n"); | |
518 | s->circular_buffer_error = AVERROR(EIO); | |
519 | goto end; | |
520 | } | |
521 | } | |
522 | av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL); | |
523 | pthread_cond_signal(&s->cond); | |
524 | } | |
525 | ||
526 | end: | |
527 | pthread_cond_signal(&s->cond); | |
528 | pthread_mutex_unlock(&s->mutex); | |
529 | return NULL; | |
530 | } | |
531 | #endif | |
532 | ||
533 | static int parse_source_list(char *buf, char **sources, int *num_sources, | |
534 | int max_sources) | |
535 | { | |
536 | char *source_start; | |
537 | ||
538 | source_start = buf; | |
539 | while (1) { | |
540 | char *next = strchr(source_start, ','); | |
541 | if (next) | |
542 | *next = '\0'; | |
543 | sources[*num_sources] = av_strdup(source_start); | |
544 | if (!sources[*num_sources]) | |
545 | return AVERROR(ENOMEM); | |
546 | source_start = next + 1; | |
547 | (*num_sources)++; | |
548 | if (*num_sources >= max_sources || !next) | |
549 | break; | |
550 | } | |
551 | return 0; | |
552 | } | |
553 | ||
554 | /* put it in UDP context */ | |
555 | /* return non zero if error */ | |
556 | static int udp_open(URLContext *h, const char *uri, int flags) | |
557 | { | |
558 | char hostname[1024], localaddr[1024] = ""; | |
f6fa7814 | 559 | int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1; |
2ba45a60 DM |
560 | UDPContext *s = h->priv_data; |
561 | int is_output; | |
562 | const char *p; | |
563 | char buf[256]; | |
564 | struct sockaddr_storage my_addr; | |
565 | socklen_t len; | |
566 | int reuse_specified = 0; | |
567 | int i, num_include_sources = 0, num_exclude_sources = 0; | |
568 | char *include_sources[32], *exclude_sources[32]; | |
569 | ||
570 | h->is_streamed = 1; | |
571 | ||
572 | is_output = !(flags & AVIO_FLAG_READ); | |
573 | if (!s->buffer_size) /* if not set explicitly */ | |
574 | s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE; | |
575 | ||
576 | p = strchr(uri, '?'); | |
577 | if (p) { | |
578 | if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) { | |
579 | char *endptr = NULL; | |
580 | s->reuse_socket = strtol(buf, &endptr, 10); | |
581 | /* assume if no digits were found it is a request to enable it */ | |
582 | if (buf == endptr) | |
583 | s->reuse_socket = 1; | |
584 | reuse_specified = 1; | |
585 | } | |
586 | if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) { | |
587 | char *endptr = NULL; | |
588 | s->overrun_nonfatal = strtol(buf, &endptr, 10); | |
589 | /* assume if no digits were found it is a request to enable it */ | |
590 | if (buf == endptr) | |
591 | s->overrun_nonfatal = 1; | |
592 | if (!HAVE_PTHREAD_CANCEL) | |
593 | av_log(h, AV_LOG_WARNING, | |
594 | "'overrun_nonfatal' option was set but it is not supported " | |
595 | "on this build (pthread support is required)\n"); | |
596 | } | |
597 | if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) { | |
598 | s->ttl = strtol(buf, NULL, 10); | |
599 | } | |
f6fa7814 DM |
600 | if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) { |
601 | s->udplite_coverage = strtol(buf, NULL, 10); | |
602 | } | |
2ba45a60 DM |
603 | if (av_find_info_tag(buf, sizeof(buf), "localport", p)) { |
604 | s->local_port = strtol(buf, NULL, 10); | |
605 | } | |
606 | if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) { | |
607 | s->packet_size = strtol(buf, NULL, 10); | |
608 | } | |
609 | if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) { | |
610 | s->buffer_size = strtol(buf, NULL, 10); | |
611 | } | |
612 | if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { | |
613 | s->is_connected = strtol(buf, NULL, 10); | |
614 | } | |
f6fa7814 DM |
615 | if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) { |
616 | dscp = strtol(buf, NULL, 10); | |
617 | } | |
2ba45a60 DM |
618 | if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) { |
619 | s->circular_buffer_size = strtol(buf, NULL, 10); | |
620 | if (!HAVE_PTHREAD_CANCEL) | |
621 | av_log(h, AV_LOG_WARNING, | |
622 | "'circular_buffer_size' option was set but it is not supported " | |
623 | "on this build (pthread support is required)\n"); | |
624 | } | |
625 | if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) { | |
626 | av_strlcpy(localaddr, buf, sizeof(localaddr)); | |
627 | } | |
628 | if (av_find_info_tag(buf, sizeof(buf), "sources", p)) { | |
629 | if (parse_source_list(buf, include_sources, &num_include_sources, | |
630 | FF_ARRAY_ELEMS(include_sources))) | |
631 | goto fail; | |
632 | } | |
633 | if (av_find_info_tag(buf, sizeof(buf), "block", p)) { | |
634 | if (parse_source_list(buf, exclude_sources, &num_exclude_sources, | |
635 | FF_ARRAY_ELEMS(exclude_sources))) | |
636 | goto fail; | |
637 | } | |
638 | if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p)) | |
639 | s->timeout = strtol(buf, NULL, 10); | |
640 | if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p)) | |
641 | s->is_broadcast = strtol(buf, NULL, 10); | |
642 | } | |
643 | /* handling needed to support options picking from both AVOption and URL */ | |
644 | s->circular_buffer_size *= 188; | |
645 | if (flags & AVIO_FLAG_WRITE) { | |
646 | h->max_packet_size = s->packet_size; | |
647 | } else { | |
648 | h->max_packet_size = UDP_MAX_PKT_SIZE; | |
649 | } | |
650 | h->rw_timeout = s->timeout; | |
651 | ||
652 | /* fill the dest addr */ | |
653 | av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); | |
654 | ||
655 | /* XXX: fix av_url_split */ | |
656 | if (hostname[0] == '\0' || hostname[0] == '?') { | |
657 | /* only accepts null hostname if input */ | |
658 | if (!(flags & AVIO_FLAG_READ)) | |
659 | goto fail; | |
660 | } else { | |
661 | if (ff_udp_set_remote_url(h, uri) < 0) | |
662 | goto fail; | |
663 | } | |
664 | ||
665 | if ((s->is_multicast || !s->local_port) && (h->flags & AVIO_FLAG_READ)) | |
666 | s->local_port = port; | |
667 | udp_fd = udp_socket_create(s, &my_addr, &len, localaddr[0] ? localaddr : s->local_addr); | |
668 | if (udp_fd < 0) | |
669 | goto fail; | |
670 | ||
671 | s->local_addr_storage=my_addr; //store for future multicast join | |
672 | ||
673 | /* Follow the requested reuse option, unless it's multicast in which | |
674 | * case enable reuse unless explicitly disabled. | |
675 | */ | |
676 | if (s->reuse_socket || (s->is_multicast && !reuse_specified)) { | |
677 | s->reuse_socket = 1; | |
678 | if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0) | |
679 | goto fail; | |
680 | } | |
681 | ||
682 | if (s->is_broadcast) { | |
683 | #ifdef SO_BROADCAST | |
684 | if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0) | |
685 | #endif | |
686 | goto fail; | |
687 | } | |
688 | ||
f6fa7814 DM |
689 | /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving. |
690 | * The receiver coverage has to be less than or equal to the sender coverage. | |
691 | * Otherwise, the receiver will drop all packets. | |
692 | */ | |
693 | if (s->udplite_coverage) { | |
694 | if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0) | |
695 | av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available"); | |
696 | ||
697 | if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0) | |
698 | av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available"); | |
699 | } | |
700 | ||
701 | if (dscp >= 0) { | |
702 | dscp <<= 2; | |
703 | if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0) | |
704 | goto fail; | |
705 | } | |
706 | ||
2ba45a60 DM |
707 | /* If multicast, try binding the multicast address first, to avoid |
708 | * receiving UDP packets from other sources aimed at the same UDP | |
709 | * port. This fails on windows. This makes sending to the same address | |
710 | * using sendto() fail, so only do it if we're opened in read-only mode. */ | |
711 | if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) { | |
712 | bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len); | |
713 | } | |
714 | /* bind to the local address if not multicast or if the multicast | |
715 | * bind failed */ | |
716 | /* the bind is needed to give a port to the socket now */ | |
717 | if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) { | |
718 | log_net_error(h, AV_LOG_ERROR, "bind failed"); | |
719 | goto fail; | |
720 | } | |
721 | ||
722 | len = sizeof(my_addr); | |
723 | getsockname(udp_fd, (struct sockaddr *)&my_addr, &len); | |
724 | s->local_port = udp_port(&my_addr, len); | |
725 | ||
726 | if (s->is_multicast) { | |
727 | if (h->flags & AVIO_FLAG_WRITE) { | |
728 | /* output */ | |
729 | if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0) | |
730 | goto fail; | |
731 | } | |
732 | if (h->flags & AVIO_FLAG_READ) { | |
733 | /* input */ | |
734 | if (num_include_sources && num_exclude_sources) { | |
735 | av_log(h, AV_LOG_ERROR, "Simultaneously including and excluding multicast sources is not supported\n"); | |
736 | goto fail; | |
737 | } | |
738 | if (num_include_sources) { | |
739 | if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, include_sources, num_include_sources, 1) < 0) | |
740 | goto fail; | |
741 | } else { | |
742 | if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0) | |
743 | goto fail; | |
744 | } | |
745 | if (num_exclude_sources) { | |
746 | if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, exclude_sources, num_exclude_sources, 0) < 0) | |
747 | goto fail; | |
748 | } | |
749 | } | |
750 | } | |
751 | ||
752 | if (is_output) { | |
753 | /* limit the tx buf size to limit latency */ | |
754 | tmp = s->buffer_size; | |
755 | if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) { | |
756 | log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)"); | |
757 | goto fail; | |
758 | } | |
759 | } else { | |
760 | /* set udp recv buffer size to the requested value (default 64K) */ | |
761 | tmp = s->buffer_size; | |
762 | if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) { | |
763 | log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)"); | |
764 | } | |
765 | len = sizeof(tmp); | |
766 | if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) { | |
767 | log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)"); | |
768 | } else { | |
769 | av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp); | |
770 | if(tmp < s->buffer_size) | |
771 | av_log(h, AV_LOG_WARNING, "attempted to set receive buffer to size %d but it only ended up set as %d", s->buffer_size, tmp); | |
772 | } | |
773 | ||
774 | /* make the socket non-blocking */ | |
775 | ff_socket_nonblock(udp_fd, 1); | |
776 | } | |
777 | if (s->is_connected) { | |
778 | if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) { | |
779 | log_net_error(h, AV_LOG_ERROR, "connect"); | |
780 | goto fail; | |
781 | } | |
782 | } | |
783 | ||
784 | for (i = 0; i < num_include_sources; i++) | |
785 | av_freep(&include_sources[i]); | |
786 | for (i = 0; i < num_exclude_sources; i++) | |
787 | av_freep(&exclude_sources[i]); | |
788 | ||
789 | s->udp_fd = udp_fd; | |
790 | ||
791 | #if HAVE_PTHREAD_CANCEL | |
792 | if (!is_output && s->circular_buffer_size) { | |
793 | int ret; | |
794 | ||
795 | /* start the task going */ | |
796 | s->fifo = av_fifo_alloc(s->circular_buffer_size); | |
797 | ret = pthread_mutex_init(&s->mutex, NULL); | |
798 | if (ret != 0) { | |
799 | av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret)); | |
800 | goto fail; | |
801 | } | |
802 | ret = pthread_cond_init(&s->cond, NULL); | |
803 | if (ret != 0) { | |
804 | av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret)); | |
805 | goto cond_fail; | |
806 | } | |
807 | ret = pthread_create(&s->circular_buffer_thread, NULL, circular_buffer_task, h); | |
808 | if (ret != 0) { | |
809 | av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret)); | |
810 | goto thread_fail; | |
811 | } | |
812 | s->thread_started = 1; | |
813 | } | |
814 | #endif | |
815 | ||
816 | return 0; | |
817 | #if HAVE_PTHREAD_CANCEL | |
818 | thread_fail: | |
819 | pthread_cond_destroy(&s->cond); | |
820 | cond_fail: | |
821 | pthread_mutex_destroy(&s->mutex); | |
822 | #endif | |
823 | fail: | |
824 | if (udp_fd >= 0) | |
825 | closesocket(udp_fd); | |
826 | av_fifo_freep(&s->fifo); | |
827 | for (i = 0; i < num_include_sources; i++) | |
828 | av_freep(&include_sources[i]); | |
829 | for (i = 0; i < num_exclude_sources; i++) | |
830 | av_freep(&exclude_sources[i]); | |
831 | return AVERROR(EIO); | |
832 | } | |
833 | ||
f6fa7814 DM |
834 | static int udplite_open(URLContext *h, const char *uri, int flags) |
835 | { | |
836 | UDPContext *s = h->priv_data; | |
837 | ||
838 | // set default checksum coverage | |
839 | s->udplite_coverage = UDP_HEADER_SIZE; | |
840 | ||
841 | return udp_open(h, uri, flags); | |
842 | } | |
843 | ||
2ba45a60 DM |
844 | static int udp_read(URLContext *h, uint8_t *buf, int size) |
845 | { | |
846 | UDPContext *s = h->priv_data; | |
847 | int ret; | |
848 | #if HAVE_PTHREAD_CANCEL | |
849 | int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK; | |
850 | ||
851 | if (s->fifo) { | |
852 | pthread_mutex_lock(&s->mutex); | |
853 | do { | |
854 | avail = av_fifo_size(s->fifo); | |
855 | if (avail) { // >=size) { | |
856 | uint8_t tmp[4]; | |
857 | ||
858 | av_fifo_generic_read(s->fifo, tmp, 4, NULL); | |
859 | avail= AV_RL32(tmp); | |
860 | if(avail > size){ | |
861 | av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n"); | |
862 | avail= size; | |
863 | } | |
864 | ||
865 | av_fifo_generic_read(s->fifo, buf, avail, NULL); | |
866 | av_fifo_drain(s->fifo, AV_RL32(tmp) - avail); | |
867 | pthread_mutex_unlock(&s->mutex); | |
868 | return avail; | |
869 | } else if(s->circular_buffer_error){ | |
870 | int err = s->circular_buffer_error; | |
871 | pthread_mutex_unlock(&s->mutex); | |
872 | return err; | |
873 | } else if(nonblock) { | |
874 | pthread_mutex_unlock(&s->mutex); | |
875 | return AVERROR(EAGAIN); | |
876 | } | |
877 | else { | |
878 | /* FIXME: using the monotonic clock would be better, | |
879 | but it does not exist on all supported platforms. */ | |
880 | int64_t t = av_gettime() + 100000; | |
881 | struct timespec tv = { .tv_sec = t / 1000000, | |
882 | .tv_nsec = (t % 1000000) * 1000 }; | |
883 | if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) { | |
884 | pthread_mutex_unlock(&s->mutex); | |
885 | return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno); | |
886 | } | |
887 | nonblock = 1; | |
888 | } | |
889 | } while( 1); | |
890 | } | |
891 | #endif | |
892 | ||
893 | if (!(h->flags & AVIO_FLAG_NONBLOCK)) { | |
894 | ret = ff_network_wait_fd(s->udp_fd, 0); | |
895 | if (ret < 0) | |
896 | return ret; | |
897 | } | |
898 | ret = recv(s->udp_fd, buf, size, 0); | |
899 | ||
900 | return ret < 0 ? ff_neterrno() : ret; | |
901 | } | |
902 | ||
903 | static int udp_write(URLContext *h, const uint8_t *buf, int size) | |
904 | { | |
905 | UDPContext *s = h->priv_data; | |
906 | int ret; | |
907 | ||
908 | if (!(h->flags & AVIO_FLAG_NONBLOCK)) { | |
909 | ret = ff_network_wait_fd(s->udp_fd, 1); | |
910 | if (ret < 0) | |
911 | return ret; | |
912 | } | |
913 | ||
914 | if (!s->is_connected) { | |
915 | ret = sendto (s->udp_fd, buf, size, 0, | |
916 | (struct sockaddr *) &s->dest_addr, | |
917 | s->dest_addr_len); | |
918 | } else | |
919 | ret = send(s->udp_fd, buf, size, 0); | |
920 | ||
921 | return ret < 0 ? ff_neterrno() : ret; | |
922 | } | |
923 | ||
924 | static int udp_close(URLContext *h) | |
925 | { | |
926 | UDPContext *s = h->priv_data; | |
927 | ||
928 | if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) | |
929 | udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage); | |
930 | closesocket(s->udp_fd); | |
931 | #if HAVE_PTHREAD_CANCEL | |
932 | if (s->thread_started) { | |
933 | int ret; | |
934 | pthread_cancel(s->circular_buffer_thread); | |
935 | ret = pthread_join(s->circular_buffer_thread, NULL); | |
936 | if (ret != 0) | |
937 | av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret)); | |
938 | pthread_mutex_destroy(&s->mutex); | |
939 | pthread_cond_destroy(&s->cond); | |
940 | } | |
941 | #endif | |
942 | av_fifo_freep(&s->fifo); | |
943 | return 0; | |
944 | } | |
945 | ||
946 | URLProtocol ff_udp_protocol = { | |
947 | .name = "udp", | |
948 | .url_open = udp_open, | |
949 | .url_read = udp_read, | |
950 | .url_write = udp_write, | |
951 | .url_close = udp_close, | |
952 | .url_get_file_handle = udp_get_file_handle, | |
953 | .priv_data_size = sizeof(UDPContext), | |
954 | .priv_data_class = &udp_context_class, | |
955 | .flags = URL_PROTOCOL_FLAG_NETWORK, | |
956 | }; | |
f6fa7814 DM |
957 | |
958 | URLProtocol ff_udplite_protocol = { | |
959 | .name = "udplite", | |
960 | .url_open = udplite_open, | |
961 | .url_read = udp_read, | |
962 | .url_write = udp_write, | |
963 | .url_close = udp_close, | |
964 | .url_get_file_handle = udp_get_file_handle, | |
965 | .priv_data_size = sizeof(UDPContext), | |
966 | .priv_data_class = &udplite_context_class, | |
967 | .flags = URL_PROTOCOL_FLAG_NETWORK, | |
968 | }; |