summaryrefslogtreecommitdiff
path: root/libavformat/udp.c (plain)
blob: 3835f989c42ba1c55658bc47bd106b9cdea17b32
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 _DEFAULT_SOURCE
28#define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
29
30#include "avformat.h"
31#include "avio_internal.h"
32#include "libavutil/avassert.h"
33#include "libavutil/parseutils.h"
34#include "libavutil/fifo.h"
35#include "libavutil/intreadwrite.h"
36#include "libavutil/avstring.h"
37#include "libavutil/opt.h"
38#include "libavutil/log.h"
39#include "libavutil/time.h"
40#include "internal.h"
41#include "network.h"
42#include "os_support.h"
43#include "url.h"
44
45#ifdef __APPLE__
46#include "TargetConditionals.h"
47#endif
48
49#if HAVE_UDPLITE_H
50#include "udplite.h"
51#else
52/* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite.
53 * So, we provide a fallback here.
54 */
55#define UDPLITE_SEND_CSCOV 10
56#define UDPLITE_RECV_CSCOV 11
57#endif
58
59#ifndef IPPROTO_UDPLITE
60#define IPPROTO_UDPLITE 136
61#endif
62
63#if HAVE_PTHREAD_CANCEL
64#include <pthread.h>
65#endif
66
67#ifndef HAVE_PTHREAD_CANCEL
68#define HAVE_PTHREAD_CANCEL 0
69#endif
70
71#ifndef IPV6_ADD_MEMBERSHIP
72#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
73#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
74#endif
75
76#define UDP_TX_BUF_SIZE 32768
77#define UDP_MAX_PKT_SIZE 65536
78#define UDP_HEADER_SIZE 8
79
80typedef struct UDPContext {
81 const AVClass *class;
82 int udp_fd;
83 int ttl;
84 int udplite_coverage;
85 int buffer_size;
86 int pkt_size;
87 int is_multicast;
88 int is_broadcast;
89 int local_port;
90 int reuse_socket;
91 int overrun_nonfatal;
92 struct sockaddr_storage dest_addr;
93 int dest_addr_len;
94 int is_connected;
95
96 /* Circular Buffer variables for use in UDP receive code */
97 int circular_buffer_size;
98 AVFifoBuffer *fifo;
99 int circular_buffer_error;
100 int64_t bitrate; /* number of bits to send per second */
101 int64_t burst_bits;
102 int close_req;
103#if HAVE_PTHREAD_CANCEL
104 pthread_t circular_buffer_thread;
105 pthread_mutex_t mutex;
106 pthread_cond_t cond;
107 int thread_started;
108#endif
109 uint8_t tmp[UDP_MAX_PKT_SIZE+4];
110 int remaining_in_dg;
111 char *localaddr;
112 int timeout;
113 struct sockaddr_storage local_addr_storage;
114 char *sources;
115 char *block;
116} UDPContext;
117
118#define OFFSET(x) offsetof(UDPContext, x)
119#define D AV_OPT_FLAG_DECODING_PARAM
120#define E AV_OPT_FLAG_ENCODING_PARAM
121static const AVOption options[] = {
122 { "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
123 { "bitrate", "Bits to send per second", OFFSET(bitrate), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E },
124 { "burst_bits", "Max length of bursts in bits (when using bitrate)", OFFSET(burst_bits), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E },
125 { "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E },
126 { "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
127 { "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
128 { "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 },
129 { "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E },
130 { "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D|E },
131 { "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
132 { "broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
133 { "ttl", "Time to live (multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, E },
134 { "connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
135 { "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 },
136 { "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D },
137 { "timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
138 { "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
139 { "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
140 { NULL }
141};
142
143static const AVClass udp_class = {
144 .class_name = "udp",
145 .item_name = av_default_item_name,
146 .option = options,
147 .version = LIBAVUTIL_VERSION_INT,
148};
149
150static const AVClass udplite_context_class = {
151 .class_name = "udplite",
152 .item_name = av_default_item_name,
153 .option = options,
154 .version = LIBAVUTIL_VERSION_INT,
155};
156
157static void log_net_error(void *ctx, int level, const char* prefix)
158{
159 char errbuf[100];
160 av_strerror(ff_neterrno(), errbuf, sizeof(errbuf));
161 av_log(ctx, level, "%s: %s\n", prefix, errbuf);
162}
163
164static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
165 struct sockaddr *addr)
166{
167#ifdef IP_MULTICAST_TTL
168 if (addr->sa_family == AF_INET) {
169 if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
170 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)");
171 return -1;
172 }
173 }
174#endif
175#if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
176 if (addr->sa_family == AF_INET6) {
177 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
178 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)");
179 return -1;
180 }
181 }
182#endif
183 return 0;
184}
185
186static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
187{
188#ifdef IP_ADD_MEMBERSHIP
189 if (addr->sa_family == AF_INET) {
190 struct ip_mreq mreq;
191
192 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
193 if (local_addr)
194 mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
195 else
196 mreq.imr_interface.s_addr= INADDR_ANY;
197 if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
198 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
199 return -1;
200 }
201 }
202#endif
203#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
204 if (addr->sa_family == AF_INET6) {
205 struct ipv6_mreq mreq6;
206
207 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
208 mreq6.ipv6mr_interface= 0;
209 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
210 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
211 return -1;
212 }
213 }
214#endif
215 return 0;
216}
217
218static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
219{
220#ifdef IP_DROP_MEMBERSHIP
221 if (addr->sa_family == AF_INET) {
222 struct ip_mreq mreq;
223
224 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
225 if (local_addr)
226 mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
227 else
228 mreq.imr_interface.s_addr= INADDR_ANY;
229 if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
230 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
231 return -1;
232 }
233 }
234#endif
235#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
236 if (addr->sa_family == AF_INET6) {
237 struct ipv6_mreq mreq6;
238
239 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
240 mreq6.ipv6mr_interface= 0;
241 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
242 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
243 return -1;
244 }
245 }
246#endif
247 return 0;
248}
249
250static struct addrinfo *udp_resolve_host(URLContext *h,
251 const char *hostname, int port,
252 int type, int family, int flags)
253{
254 struct addrinfo hints = { 0 }, *res = 0;
255 int error;
256 char sport[16];
257 const char *node = 0, *service = "0";
258
259 if (port > 0) {
260 snprintf(sport, sizeof(sport), "%d", port);
261 service = sport;
262 }
263 if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
264 node = hostname;
265 }
266 hints.ai_socktype = type;
267 hints.ai_family = family;
268 hints.ai_flags = flags;
269 if ((error = getaddrinfo(node, service, &hints, &res))) {
270 res = NULL;
271 av_log(h, AV_LOG_ERROR, "getaddrinfo(%s, %s): %s\n",
272 node ? node : "unknown",
273 service,
274 gai_strerror(error));
275 }
276
277 return res;
278}
279
280static int udp_set_multicast_sources(URLContext *h,
281 int sockfd, struct sockaddr *addr,
282 int addr_len, char **sources,
283 int nb_sources, int include)
284{
285#if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32) && (!defined(TARGET_OS_TV) || !TARGET_OS_TV)
286 /* These ones are available in the microsoft SDK, but don't seem to work
287 * as on linux, so just prefer the v4-only approach there for now. */
288 int i;
289 for (i = 0; i < nb_sources; i++) {
290 struct group_source_req mreqs;
291 int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
292 struct addrinfo *sourceaddr = udp_resolve_host(h, sources[i], 0,
293 SOCK_DGRAM, AF_UNSPEC,
294 0);
295 if (!sourceaddr)
296 return AVERROR(ENOENT);
297
298 mreqs.gsr_interface = 0;
299 memcpy(&mreqs.gsr_group, addr, addr_len);
300 memcpy(&mreqs.gsr_source, sourceaddr->ai_addr, sourceaddr->ai_addrlen);
301 freeaddrinfo(sourceaddr);
302
303 if (setsockopt(sockfd, level,
304 include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
305 (const void *)&mreqs, sizeof(mreqs)) < 0) {
306 if (include)
307 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
308 else
309 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
310 return ff_neterrno();
311 }
312 }
313#elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
314 int i;
315 if (addr->sa_family != AF_INET) {
316 av_log(NULL, AV_LOG_ERROR,
317 "Setting multicast sources only supported for IPv4\n");
318 return AVERROR(EINVAL);
319 }
320 for (i = 0; i < nb_sources; i++) {
321 struct ip_mreq_source mreqs;
322 struct addrinfo *sourceaddr = udp_resolve_host(h, sources[i], 0,
323 SOCK_DGRAM, AF_UNSPEC,
324 0);
325 if (!sourceaddr)
326 return AVERROR(ENOENT);
327 if (sourceaddr->ai_addr->sa_family != AF_INET) {
328 freeaddrinfo(sourceaddr);
329 av_log(NULL, AV_LOG_ERROR, "%s is of incorrect protocol family\n",
330 sources[i]);
331 return AVERROR(EINVAL);
332 }
333
334 mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
335 mreqs.imr_interface.s_addr = INADDR_ANY;
336 mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)sourceaddr->ai_addr)->sin_addr.s_addr;
337 freeaddrinfo(sourceaddr);
338
339 if (setsockopt(sockfd, IPPROTO_IP,
340 include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
341 (const void *)&mreqs, sizeof(mreqs)) < 0) {
342 if (include)
343 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
344 else
345 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
346 return ff_neterrno();
347 }
348 }
349#else
350 return AVERROR(ENOSYS);
351#endif
352 return 0;
353}
354static int udp_set_url(URLContext *h,
355 struct sockaddr_storage *addr,
356 const char *hostname, int port)
357{
358 struct addrinfo *res0;
359 int addr_len;
360
361 res0 = udp_resolve_host(h, hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
362 if (!res0) return AVERROR(EIO);
363 memcpy(addr, res0->ai_addr, res0->ai_addrlen);
364 addr_len = res0->ai_addrlen;
365 freeaddrinfo(res0);
366
367 return addr_len;
368}
369
370static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr,
371 socklen_t *addr_len, const char *localaddr)
372{
373 UDPContext *s = h->priv_data;
374 int udp_fd = -1;
375 struct addrinfo *res0, *res;
376 int family = AF_UNSPEC;
377
378 if (((struct sockaddr *) &s->dest_addr)->sa_family)
379 family = ((struct sockaddr *) &s->dest_addr)->sa_family;
380 res0 = udp_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL,
381 s->local_port,
382 SOCK_DGRAM, family, AI_PASSIVE);
383 if (!res0)
384 goto fail;
385 for (res = res0; res; res=res->ai_next) {
386 if (s->udplite_coverage)
387 udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE);
388 else
389 udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0);
390 if (udp_fd != -1) break;
391 log_net_error(NULL, AV_LOG_ERROR, "socket");
392 }
393
394 if (udp_fd < 0)
395 goto fail;
396
397 memcpy(addr, res->ai_addr, res->ai_addrlen);
398 *addr_len = res->ai_addrlen;
399
400 freeaddrinfo(res0);
401
402 return udp_fd;
403
404 fail:
405 if (udp_fd >= 0)
406 closesocket(udp_fd);
407 if(res0)
408 freeaddrinfo(res0);
409 return -1;
410}
411
412static int udp_port(struct sockaddr_storage *addr, int addr_len)
413{
414 char sbuf[sizeof(int)*3+1];
415 int error;
416
417 if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
418 av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
419 return -1;
420 }
421
422 return strtol(sbuf, NULL, 10);
423}
424
425
426/**
427 * If no filename is given to av_open_input_file because you want to
428 * get the local port first, then you must call this function to set
429 * the remote server address.
430 *
431 * url syntax: udp://host:port[?option=val...]
432 * option: 'ttl=n' : set the ttl value (for multicast only)
433 * 'localport=n' : set the local port
434 * 'pkt_size=n' : set max packet size
435 * 'reuse=1' : enable reusing the socket
436 * 'overrun_nonfatal=1': survive in case of circular buffer overrun
437 *
438 * @param h media file context
439 * @param uri of the remote server
440 * @return zero if no error.
441 */
442int ff_udp_set_remote_url(URLContext *h, const char *uri)
443{
444 UDPContext *s = h->priv_data;
445 char hostname[256], buf[10];
446 int port;
447 const char *p;
448
449 av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
450
451 /* set the destination address */
452 s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port);
453 if (s->dest_addr_len < 0) {
454 return AVERROR(EIO);
455 }
456 s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
457 p = strchr(uri, '?');
458 if (p) {
459 if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
460 int was_connected = s->is_connected;
461 s->is_connected = strtol(buf, NULL, 10);
462 if (s->is_connected && !was_connected) {
463 if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
464 s->dest_addr_len)) {
465 s->is_connected = 0;
466 log_net_error(h, AV_LOG_ERROR, "connect");
467 return AVERROR(EIO);
468 }
469 }
470 }
471 }
472
473 return 0;
474}
475
476/**
477 * Return the local port used by the UDP connection
478 * @param h media file context
479 * @return the local port number
480 */
481int ff_udp_get_local_port(URLContext *h)
482{
483 UDPContext *s = h->priv_data;
484 return s->local_port;
485}
486
487/**
488 * Return the udp file handle for select() usage to wait for several RTP
489 * streams at the same time.
490 * @param h media file context
491 */
492static int udp_get_file_handle(URLContext *h)
493{
494 UDPContext *s = h->priv_data;
495 return s->udp_fd;
496}
497
498#if HAVE_PTHREAD_CANCEL
499static void *circular_buffer_task_rx( void *_URLContext)
500{
501 URLContext *h = _URLContext;
502 UDPContext *s = h->priv_data;
503 int old_cancelstate;
504
505 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
506 pthread_mutex_lock(&s->mutex);
507 if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
508 av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
509 s->circular_buffer_error = AVERROR(EIO);
510 goto end;
511 }
512 while(1) {
513 int len;
514
515 pthread_mutex_unlock(&s->mutex);
516 /* Blocking operations are always cancellation points;
517 see "General Information" / "Thread Cancelation Overview"
518 in Single Unix. */
519 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
520 len = recv(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0);
521 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
522 pthread_mutex_lock(&s->mutex);
523 if (len < 0) {
524 if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) {
525 s->circular_buffer_error = ff_neterrno();
526 goto end;
527 }
528 continue;
529 }
530 AV_WL32(s->tmp, len);
531
532 if(av_fifo_space(s->fifo) < len + 4) {
533 /* No Space left */
534 if (s->overrun_nonfatal) {
535 av_log(h, AV_LOG_WARNING, "Circular buffer overrun. "
536 "Surviving due to overrun_nonfatal option\n");
537 continue;
538 } else {
539 av_log(h, AV_LOG_ERROR, "Circular buffer overrun. "
540 "To avoid, increase fifo_size URL option. "
541 "To survive in such case, use overrun_nonfatal option\n");
542 s->circular_buffer_error = AVERROR(EIO);
543 goto end;
544 }
545 }
546 av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL);
547 pthread_cond_signal(&s->cond);
548 }
549
550end:
551 pthread_cond_signal(&s->cond);
552 pthread_mutex_unlock(&s->mutex);
553 return NULL;
554}
555
556static void *circular_buffer_task_tx( void *_URLContext)
557{
558 URLContext *h = _URLContext;
559 UDPContext *s = h->priv_data;
560 int old_cancelstate;
561 int64_t target_timestamp = av_gettime_relative();
562 int64_t start_timestamp = av_gettime_relative();
563 int64_t sent_bits = 0;
564 int64_t burst_interval = s->bitrate ? (s->burst_bits * 1000000 / s->bitrate) : 0;
565 int64_t max_delay = s->bitrate ? ((int64_t)h->max_packet_size * 8 * 1000000 / s->bitrate + 1) : 0;
566
567 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
568 pthread_mutex_lock(&s->mutex);
569
570 if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
571 av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
572 s->circular_buffer_error = AVERROR(EIO);
573 goto end;
574 }
575
576 for(;;) {
577 int len;
578 const uint8_t *p;
579 uint8_t tmp[4];
580 int64_t timestamp;
581
582 len=av_fifo_size(s->fifo);
583
584 while (len<4) {
585 if (s->close_req)
586 goto end;
587 if (pthread_cond_wait(&s->cond, &s->mutex) < 0) {
588 goto end;
589 }
590 len=av_fifo_size(s->fifo);
591 }
592
593 av_fifo_generic_read(s->fifo, tmp, 4, NULL);
594 len=AV_RL32(tmp);
595
596 av_assert0(len >= 0);
597 av_assert0(len <= sizeof(s->tmp));
598
599 av_fifo_generic_read(s->fifo, s->tmp, len, NULL);
600
601 pthread_mutex_unlock(&s->mutex);
602 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
603
604 if (s->bitrate) {
605 timestamp = av_gettime_relative();
606 if (timestamp < target_timestamp) {
607 int64_t delay = target_timestamp - timestamp;
608 if (delay > max_delay) {
609 delay = max_delay;
610 start_timestamp = timestamp + delay;
611 sent_bits = 0;
612 }
613 av_usleep(delay);
614 } else {
615 if (timestamp - burst_interval > target_timestamp) {
616 start_timestamp = timestamp - burst_interval;
617 sent_bits = 0;
618 }
619 }
620 sent_bits += len * 8;
621 target_timestamp = start_timestamp + sent_bits * 1000000 / s->bitrate;
622 }
623
624 p = s->tmp;
625 while (len) {
626 int ret;
627 av_assert0(len > 0);
628 if (!s->is_connected) {
629 ret = sendto (s->udp_fd, p, len, 0,
630 (struct sockaddr *) &s->dest_addr,
631 s->dest_addr_len);
632 } else
633 ret = send(s->udp_fd, p, len, 0);
634 if (ret >= 0) {
635 len -= ret;
636 p += ret;
637 } else {
638 ret = ff_neterrno();
639 if (ret != AVERROR(EAGAIN) && ret != AVERROR(EINTR)) {
640 pthread_mutex_lock(&s->mutex);
641 s->circular_buffer_error = ret;
642 pthread_mutex_unlock(&s->mutex);
643 return NULL;
644 }
645 }
646 }
647
648 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
649 pthread_mutex_lock(&s->mutex);
650 }
651
652end:
653 pthread_mutex_unlock(&s->mutex);
654 return NULL;
655}
656
657
658#endif
659
660static int parse_source_list(char *buf, char **sources, int *num_sources,
661 int max_sources)
662{
663 char *source_start;
664
665 source_start = buf;
666 while (1) {
667 char *next = strchr(source_start, ',');
668 if (next)
669 *next = '\0';
670 sources[*num_sources] = av_strdup(source_start);
671 if (!sources[*num_sources])
672 return AVERROR(ENOMEM);
673 source_start = next + 1;
674 (*num_sources)++;
675 if (*num_sources >= max_sources || !next)
676 break;
677 }
678 return 0;
679}
680
681/* put it in UDP context */
682/* return non zero if error */
683static int udp_open(URLContext *h, const char *uri, int flags)
684{
685 char hostname[1024], localaddr[1024] = "";
686 int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1;
687 UDPContext *s = h->priv_data;
688 int is_output;
689 const char *p;
690 char buf[256];
691 struct sockaddr_storage my_addr;
692 socklen_t len;
693 int i, num_include_sources = 0, num_exclude_sources = 0;
694 char *include_sources[32], *exclude_sources[32];
695
696 h->is_streamed = 1;
697
698 is_output = !(flags & AVIO_FLAG_READ);
699 if (s->buffer_size < 0)
700 s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
701
702 if (s->sources) {
703 if (parse_source_list(s->sources, include_sources,
704 &num_include_sources,
705 FF_ARRAY_ELEMS(include_sources)))
706 goto fail;
707 }
708
709 if (s->block) {
710 if (parse_source_list(s->block, exclude_sources, &num_exclude_sources,
711 FF_ARRAY_ELEMS(exclude_sources)))
712 goto fail;
713 }
714
715 if (s->pkt_size > 0)
716 h->max_packet_size = s->pkt_size;
717
718 p = strchr(uri, '?');
719 if (p) {
720 if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
721 char *endptr = NULL;
722 s->reuse_socket = strtol(buf, &endptr, 10);
723 /* assume if no digits were found it is a request to enable it */
724 if (buf == endptr)
725 s->reuse_socket = 1;
726 }
727 if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
728 char *endptr = NULL;
729 s->overrun_nonfatal = strtol(buf, &endptr, 10);
730 /* assume if no digits were found it is a request to enable it */
731 if (buf == endptr)
732 s->overrun_nonfatal = 1;
733 if (!HAVE_PTHREAD_CANCEL)
734 av_log(h, AV_LOG_WARNING,
735 "'overrun_nonfatal' option was set but it is not supported "
736 "on this build (pthread support is required)\n");
737 }
738 if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
739 s->ttl = strtol(buf, NULL, 10);
740 }
741 if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
742 s->udplite_coverage = strtol(buf, NULL, 10);
743 }
744 if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
745 s->local_port = strtol(buf, NULL, 10);
746 }
747 if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
748 s->pkt_size = strtol(buf, NULL, 10);
749 }
750 if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
751 s->buffer_size = strtol(buf, NULL, 10);
752 }
753 if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
754 s->is_connected = strtol(buf, NULL, 10);
755 }
756 if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
757 dscp = strtol(buf, NULL, 10);
758 }
759 if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) {
760 s->circular_buffer_size = strtol(buf, NULL, 10);
761 if (!HAVE_PTHREAD_CANCEL)
762 av_log(h, AV_LOG_WARNING,
763 "'circular_buffer_size' option was set but it is not supported "
764 "on this build (pthread support is required)\n");
765 }
766 if (av_find_info_tag(buf, sizeof(buf), "bitrate", p)) {
767 s->bitrate = strtoll(buf, NULL, 10);
768 if (!HAVE_PTHREAD_CANCEL)
769 av_log(h, AV_LOG_WARNING,
770 "'bitrate' option was set but it is not supported "
771 "on this build (pthread support is required)\n");
772 }
773 if (av_find_info_tag(buf, sizeof(buf), "burst_bits", p)) {
774 s->burst_bits = strtoll(buf, NULL, 10);
775 }
776 if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
777 av_strlcpy(localaddr, buf, sizeof(localaddr));
778 }
779 if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
780 if (parse_source_list(buf, include_sources, &num_include_sources,
781 FF_ARRAY_ELEMS(include_sources)))
782 goto fail;
783 }
784 if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
785 if (parse_source_list(buf, exclude_sources, &num_exclude_sources,
786 FF_ARRAY_ELEMS(exclude_sources)))
787 goto fail;
788 }
789 if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
790 s->timeout = strtol(buf, NULL, 10);
791 if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p))
792 s->is_broadcast = strtol(buf, NULL, 10);
793 }
794 /* handling needed to support options picking from both AVOption and URL */
795 s->circular_buffer_size *= 188;
796 if (flags & AVIO_FLAG_WRITE) {
797 h->max_packet_size = s->pkt_size;
798 } else {
799 h->max_packet_size = UDP_MAX_PKT_SIZE;
800 }
801 h->rw_timeout = s->timeout;
802
803 /* fill the dest addr */
804 av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
805
806 /* XXX: fix av_url_split */
807 if (hostname[0] == '\0' || hostname[0] == '?') {
808 /* only accepts null hostname if input */
809 if (!(flags & AVIO_FLAG_READ))
810 goto fail;
811 } else {
812 if (ff_udp_set_remote_url(h, uri) < 0)
813 goto fail;
814 }
815
816 if ((s->is_multicast || s->local_port <= 0) && (h->flags & AVIO_FLAG_READ))
817 s->local_port = port;
818
819 if (localaddr[0])
820 udp_fd = udp_socket_create(h, &my_addr, &len, localaddr);
821 else
822 udp_fd = udp_socket_create(h, &my_addr, &len, s->localaddr);
823 if (udp_fd < 0)
824 goto fail;
825
826 s->local_addr_storage=my_addr; //store for future multicast join
827
828 /* Follow the requested reuse option, unless it's multicast in which
829 * case enable reuse unless explicitly disabled.
830 */
831 if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
832 s->reuse_socket = 1;
833 if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
834 goto fail;
835 }
836
837 if (s->is_broadcast) {
838#ifdef SO_BROADCAST
839 if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
840#endif
841 goto fail;
842 }
843
844 /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
845 * The receiver coverage has to be less than or equal to the sender coverage.
846 * Otherwise, the receiver will drop all packets.
847 */
848 if (s->udplite_coverage) {
849 if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
850 av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
851
852 if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
853 av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
854 }
855
856 if (dscp >= 0) {
857 dscp <<= 2;
858 if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
859 goto fail;
860 }
861
862 /* If multicast, try binding the multicast address first, to avoid
863 * receiving UDP packets from other sources aimed at the same UDP
864 * port. This fails on windows. This makes sending to the same address
865 * using sendto() fail, so only do it if we're opened in read-only mode. */
866 if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
867 bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
868 }
869 /* bind to the local address if not multicast or if the multicast
870 * bind failed */
871 /* the bind is needed to give a port to the socket now */
872 if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
873 log_net_error(h, AV_LOG_ERROR, "bind failed");
874 goto fail;
875 }
876
877 len = sizeof(my_addr);
878 getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
879 s->local_port = udp_port(&my_addr, len);
880
881 if (s->is_multicast) {
882 if (h->flags & AVIO_FLAG_WRITE) {
883 /* output */
884 if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
885 goto fail;
886 }
887 if (h->flags & AVIO_FLAG_READ) {
888 /* input */
889 if (num_include_sources && num_exclude_sources) {
890 av_log(h, AV_LOG_ERROR, "Simultaneously including and excluding multicast sources is not supported\n");
891 goto fail;
892 }
893 if (num_include_sources) {
894 if (udp_set_multicast_sources(h, udp_fd,
895 (struct sockaddr *)&s->dest_addr,
896 s->dest_addr_len,
897 include_sources,
898 num_include_sources, 1) < 0)
899 goto fail;
900 } else {
901 if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
902 goto fail;
903 }
904 if (num_exclude_sources) {
905 if (udp_set_multicast_sources(h, udp_fd,
906 (struct sockaddr *)&s->dest_addr,
907 s->dest_addr_len,
908 exclude_sources,
909 num_exclude_sources, 0) < 0)
910 goto fail;
911 }
912 }
913 }
914
915 if (is_output) {
916 /* limit the tx buf size to limit latency */
917 tmp = s->buffer_size;
918 if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
919 log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
920 goto fail;
921 }
922 } else {
923 /* set udp recv buffer size to the requested value (default 64K) */
924 tmp = s->buffer_size;
925 if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
926 log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
927 }
928 len = sizeof(tmp);
929 if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
930 log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
931 } else {
932 av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
933 if(tmp < s->buffer_size)
934 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);
935 }
936
937 /* make the socket non-blocking */
938 ff_socket_nonblock(udp_fd, 1);
939 }
940 if (s->is_connected) {
941 if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
942 log_net_error(h, AV_LOG_ERROR, "connect");
943 goto fail;
944 }
945 }
946
947 for (i = 0; i < num_include_sources; i++)
948 av_freep(&include_sources[i]);
949 for (i = 0; i < num_exclude_sources; i++)
950 av_freep(&exclude_sources[i]);
951
952 s->udp_fd = udp_fd;
953
954#if HAVE_PTHREAD_CANCEL
955 /*
956 Create thread in case of:
957 1. Input and circular_buffer_size is set
958 2. Output and bitrate and circular_buffer_size is set
959 */
960
961 if (is_output && s->bitrate && !s->circular_buffer_size) {
962 /* Warn user in case of 'circular_buffer_size' is not set */
963 av_log(h, AV_LOG_WARNING,"'bitrate' option was set but 'circular_buffer_size' is not, but required\n");
964 }
965
966 if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
967 int ret;
968
969 /* start the task going */
970 s->fifo = av_fifo_alloc(s->circular_buffer_size);
971 ret = pthread_mutex_init(&s->mutex, NULL);
972 if (ret != 0) {
973 av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
974 goto fail;
975 }
976 ret = pthread_cond_init(&s->cond, NULL);
977 if (ret != 0) {
978 av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
979 goto cond_fail;
980 }
981 ret = pthread_create(&s->circular_buffer_thread, NULL, is_output?circular_buffer_task_tx:circular_buffer_task_rx, h);
982 if (ret != 0) {
983 av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
984 goto thread_fail;
985 }
986 s->thread_started = 1;
987 }
988#endif
989
990 return 0;
991#if HAVE_PTHREAD_CANCEL
992 thread_fail:
993 pthread_cond_destroy(&s->cond);
994 cond_fail:
995 pthread_mutex_destroy(&s->mutex);
996#endif
997 fail:
998 if (udp_fd >= 0)
999 closesocket(udp_fd);
1000 av_fifo_freep(&s->fifo);
1001 for (i = 0; i < num_include_sources; i++)
1002 av_freep(&include_sources[i]);
1003 for (i = 0; i < num_exclude_sources; i++)
1004 av_freep(&exclude_sources[i]);
1005 return AVERROR(EIO);
1006}
1007
1008static int udplite_open(URLContext *h, const char *uri, int flags)
1009{
1010 UDPContext *s = h->priv_data;
1011
1012 // set default checksum coverage
1013 s->udplite_coverage = UDP_HEADER_SIZE;
1014
1015 return udp_open(h, uri, flags);
1016}
1017
1018static int udp_read(URLContext *h, uint8_t *buf, int size)
1019{
1020 UDPContext *s = h->priv_data;
1021 int ret;
1022#if HAVE_PTHREAD_CANCEL
1023 int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
1024
1025 if (s->fifo) {
1026 pthread_mutex_lock(&s->mutex);
1027 do {
1028 avail = av_fifo_size(s->fifo);
1029 if (avail) { // >=size) {
1030 uint8_t tmp[4];
1031
1032 av_fifo_generic_read(s->fifo, tmp, 4, NULL);
1033 avail= AV_RL32(tmp);
1034 if(avail > size){
1035 av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
1036 avail= size;
1037 }
1038
1039 av_fifo_generic_read(s->fifo, buf, avail, NULL);
1040 av_fifo_drain(s->fifo, AV_RL32(tmp) - avail);
1041 pthread_mutex_unlock(&s->mutex);
1042 return avail;
1043 } else if(s->circular_buffer_error){
1044 int err = s->circular_buffer_error;
1045 pthread_mutex_unlock(&s->mutex);
1046 return err;
1047 } else if(nonblock) {
1048 pthread_mutex_unlock(&s->mutex);
1049 return AVERROR(EAGAIN);
1050 }
1051 else {
1052 /* FIXME: using the monotonic clock would be better,
1053 but it does not exist on all supported platforms. */
1054 int64_t t = av_gettime() + 100000;
1055 struct timespec tv = { .tv_sec = t / 1000000,
1056 .tv_nsec = (t % 1000000) * 1000 };
1057 if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) {
1058 pthread_mutex_unlock(&s->mutex);
1059 return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno);
1060 }
1061 nonblock = 1;
1062 }
1063 } while( 1);
1064 }
1065#endif
1066
1067 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1068 ret = ff_network_wait_fd(s->udp_fd, 0);
1069 if (ret < 0)
1070 return ret;
1071 }
1072 ret = recv(s->udp_fd, buf, size, 0);
1073
1074 return ret < 0 ? ff_neterrno() : ret;
1075}
1076
1077static int udp_write(URLContext *h, const uint8_t *buf, int size)
1078{
1079 UDPContext *s = h->priv_data;
1080 int ret;
1081
1082#if HAVE_PTHREAD_CANCEL
1083 if (s->fifo) {
1084 uint8_t tmp[4];
1085
1086 pthread_mutex_lock(&s->mutex);
1087
1088 /*
1089 Return error if last tx failed.
1090 Here we can't know on which packet error was, but it needs to know that error exists.
1091 */
1092 if (s->circular_buffer_error<0) {
1093 int err=s->circular_buffer_error;
1094 pthread_mutex_unlock(&s->mutex);
1095 return err;
1096 }
1097
1098 if(av_fifo_space(s->fifo) < size + 4) {
1099 /* What about a partial packet tx ? */
1100 pthread_mutex_unlock(&s->mutex);
1101 return AVERROR(ENOMEM);
1102 }
1103 AV_WL32(tmp, size);
1104 av_fifo_generic_write(s->fifo, tmp, 4, NULL); /* size of packet */
1105 av_fifo_generic_write(s->fifo, (uint8_t *)buf, size, NULL); /* the data */
1106 pthread_cond_signal(&s->cond);
1107 pthread_mutex_unlock(&s->mutex);
1108 return size;
1109 }
1110#endif
1111 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1112 ret = ff_network_wait_fd(s->udp_fd, 1);
1113 if (ret < 0)
1114 return ret;
1115 }
1116
1117 if (!s->is_connected) {
1118 ret = sendto (s->udp_fd, buf, size, 0,
1119 (struct sockaddr *) &s->dest_addr,
1120 s->dest_addr_len);
1121 } else
1122 ret = send(s->udp_fd, buf, size, 0);
1123
1124 return ret < 0 ? ff_neterrno() : ret;
1125}
1126
1127static int udp_close(URLContext *h)
1128{
1129 UDPContext *s = h->priv_data;
1130
1131#if HAVE_PTHREAD_CANCEL
1132 // Request close once writing is finished
1133 if (s->thread_started && !(h->flags & AVIO_FLAG_READ)) {
1134 pthread_mutex_lock(&s->mutex);
1135 s->close_req = 1;
1136 pthread_cond_signal(&s->cond);
1137 pthread_mutex_unlock(&s->mutex);
1138 }
1139#endif
1140
1141 if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
1142 udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage);
1143#if HAVE_PTHREAD_CANCEL
1144 if (s->thread_started) {
1145 int ret;
1146 // Cancel only read, as write has been signaled as success to the user
1147 if (h->flags & AVIO_FLAG_READ)
1148 pthread_cancel(s->circular_buffer_thread);
1149 ret = pthread_join(s->circular_buffer_thread, NULL);
1150 if (ret != 0)
1151 av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
1152 pthread_mutex_destroy(&s->mutex);
1153 pthread_cond_destroy(&s->cond);
1154 }
1155#endif
1156 closesocket(s->udp_fd);
1157 av_fifo_freep(&s->fifo);
1158 return 0;
1159}
1160
1161const URLProtocol ff_udp_protocol = {
1162 .name = "udp",
1163 .url_open = udp_open,
1164 .url_read = udp_read,
1165 .url_write = udp_write,
1166 .url_close = udp_close,
1167 .url_get_file_handle = udp_get_file_handle,
1168 .priv_data_size = sizeof(UDPContext),
1169 .priv_data_class = &udp_class,
1170 .flags = URL_PROTOCOL_FLAG_NETWORK,
1171};
1172
1173const URLProtocol ff_udplite_protocol = {
1174 .name = "udplite",
1175 .url_open = udplite_open,
1176 .url_read = udp_read,
1177 .url_write = udp_write,
1178 .url_close = udp_close,
1179 .url_get_file_handle = udp_get_file_handle,
1180 .priv_data_size = sizeof(UDPContext),
1181 .priv_data_class = &udplite_context_class,
1182 .flags = URL_PROTOCOL_FLAG_NETWORK,
1183};
1184
generated by cgit at 2024-05-17 06:59:27 (GMT)