2 * UDP prototype streaming system
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
27 #define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
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"
40 #include "os_support.h"
46 /* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite.
47 * So, we provide a fallback here.
49 #define UDPLITE_SEND_CSCOV 10
50 #define UDPLITE_RECV_CSCOV 11
53 #ifndef IPPROTO_UDPLITE
54 #define IPPROTO_UDPLITE 136
57 #if HAVE_PTHREAD_CANCEL
61 #ifndef HAVE_PTHREAD_CANCEL
62 #define HAVE_PTHREAD_CANCEL 0
65 #ifndef IPV6_ADD_MEMBERSHIP
66 #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
67 #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
70 #define UDP_TX_BUF_SIZE 32768
71 #define UDP_MAX_PKT_SIZE 65536
72 #define UDP_HEADER_SIZE 8
74 typedef struct UDPContext {
86 struct sockaddr_storage dest_addr;
90 /* Circular Buffer variables for use in UDP receive code */
91 int circular_buffer_size;
93 int circular_buffer_error;
94 #if HAVE_PTHREAD_CANCEL
95 pthread_t circular_buffer_thread;
96 pthread_mutex_t mutex;
100 uint8_t tmp[UDP_MAX_PKT_SIZE+4];
104 struct sockaddr_storage local_addr_storage;
109 #define OFFSET(x) offsetof(UDPContext, x)
110 #define D AV_OPT_FLAG_DECODING_PARAM
111 #define E AV_OPT_FLAG_ENCODING_PARAM
112 static const AVOption options[] = {
113 { "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
114 { "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E },
115 { "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
116 { "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
117 { "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 },
118 { "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E },
119 { "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, D|E },
120 { "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, .flags = D|E },
121 { "broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E },
122 { "ttl", "Time to live (multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, E },
123 { "connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D|E },
124 { "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 },
125 { "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D },
126 { "timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
127 { "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
128 { "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
132 static const AVClass udp_class = {
134 .item_name = av_default_item_name,
136 .version = LIBAVUTIL_VERSION_INT,
139 static const AVClass udplite_context_class = {
140 .class_name = "udplite",
141 .item_name = av_default_item_name,
143 .version = LIBAVUTIL_VERSION_INT,
146 static void log_net_error(void *ctx, int level, const char* prefix)
149 av_strerror(ff_neterrno(), errbuf, sizeof(errbuf));
150 av_log(ctx, level, "%s: %s\n", prefix, errbuf);
153 static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
154 struct sockaddr *addr)
156 #ifdef IP_MULTICAST_TTL
157 if (addr->sa_family == AF_INET) {
158 if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
159 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)");
164 #if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
165 if (addr->sa_family == AF_INET6) {
166 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
167 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)");
175 static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
177 #ifdef IP_ADD_MEMBERSHIP
178 if (addr->sa_family == AF_INET) {
181 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
183 mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
185 mreq.imr_interface.s_addr= INADDR_ANY;
186 if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
187 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
192 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
193 if (addr->sa_family == AF_INET6) {
194 struct ipv6_mreq mreq6;
196 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
197 mreq6.ipv6mr_interface= 0;
198 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
199 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
207 static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
209 #ifdef IP_DROP_MEMBERSHIP
210 if (addr->sa_family == AF_INET) {
213 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
215 mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
217 mreq.imr_interface.s_addr= INADDR_ANY;
218 if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
219 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
224 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
225 if (addr->sa_family == AF_INET6) {
226 struct ipv6_mreq mreq6;
228 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
229 mreq6.ipv6mr_interface= 0;
230 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
231 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
239 static struct addrinfo* udp_resolve_host(const char *hostname, int port,
240 int type, int family, int flags)
242 struct addrinfo hints = { 0 }, *res = 0;
245 const char *node = 0, *service = "0";
248 snprintf(sport, sizeof(sport), "%d", port);
251 if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
254 hints.ai_socktype = type;
255 hints.ai_family = family;
256 hints.ai_flags = flags;
257 if ((error = getaddrinfo(node, service, &hints, &res))) {
259 av_log(NULL, AV_LOG_ERROR, "udp_resolve_host: %s\n", gai_strerror(error));
265 static int udp_set_multicast_sources(int sockfd, struct sockaddr *addr,
266 int addr_len, char **sources,
267 int nb_sources, int include)
269 #if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32)
270 /* These ones are available in the microsoft SDK, but don't seem to work
271 * as on linux, so just prefer the v4-only approach there for now. */
273 for (i = 0; i < nb_sources; i++) {
274 struct group_source_req mreqs;
275 int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
276 struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0,
277 SOCK_DGRAM, AF_UNSPEC,
280 return AVERROR(ENOENT);
282 mreqs.gsr_interface = 0;
283 memcpy(&mreqs.gsr_group, addr, addr_len);
284 memcpy(&mreqs.gsr_source, sourceaddr->ai_addr, sourceaddr->ai_addrlen);
285 freeaddrinfo(sourceaddr);
287 if (setsockopt(sockfd, level,
288 include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
289 (const void *)&mreqs, sizeof(mreqs)) < 0) {
291 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
293 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
294 return ff_neterrno();
297 #elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
299 if (addr->sa_family != AF_INET) {
300 av_log(NULL, AV_LOG_ERROR,
301 "Setting multicast sources only supported for IPv4\n");
302 return AVERROR(EINVAL);
304 for (i = 0; i < nb_sources; i++) {
305 struct ip_mreq_source mreqs;
306 struct addrinfo *sourceaddr = udp_resolve_host(sources[i], 0,
307 SOCK_DGRAM, AF_UNSPEC,
310 return AVERROR(ENOENT);
311 if (sourceaddr->ai_addr->sa_family != AF_INET) {
312 freeaddrinfo(sourceaddr);
313 av_log(NULL, AV_LOG_ERROR, "%s is of incorrect protocol family\n",
315 return AVERROR(EINVAL);
318 mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
319 mreqs.imr_interface.s_addr = INADDR_ANY;
320 mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)sourceaddr->ai_addr)->sin_addr.s_addr;
321 freeaddrinfo(sourceaddr);
323 if (setsockopt(sockfd, IPPROTO_IP,
324 include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
325 (const void *)&mreqs, sizeof(mreqs)) < 0) {
327 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
329 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
330 return ff_neterrno();
334 return AVERROR(ENOSYS);
338 static int udp_set_url(struct sockaddr_storage *addr,
339 const char *hostname, int port)
341 struct addrinfo *res0;
344 res0 = udp_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
345 if (!res0) return AVERROR(EIO);
346 memcpy(addr, res0->ai_addr, res0->ai_addrlen);
347 addr_len = res0->ai_addrlen;
353 static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr,
354 socklen_t *addr_len, const char *localaddr)
357 struct addrinfo *res0, *res;
358 int family = AF_UNSPEC;
360 if (((struct sockaddr *) &s->dest_addr)->sa_family)
361 family = ((struct sockaddr *) &s->dest_addr)->sa_family;
362 res0 = udp_resolve_host((localaddr && localaddr[0]) ? localaddr : NULL, s->local_port,
363 SOCK_DGRAM, family, AI_PASSIVE);
366 for (res = res0; res; res=res->ai_next) {
367 if (s->udplite_coverage)
368 udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE);
370 udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0);
371 if (udp_fd != -1) break;
372 log_net_error(NULL, AV_LOG_ERROR, "socket");
378 memcpy(addr, res->ai_addr, res->ai_addrlen);
379 *addr_len = res->ai_addrlen;
393 static int udp_port(struct sockaddr_storage *addr, int addr_len)
395 char sbuf[sizeof(int)*3+1];
398 if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
399 av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
403 return strtol(sbuf, NULL, 10);
408 * If no filename is given to av_open_input_file because you want to
409 * get the local port first, then you must call this function to set
410 * the remote server address.
412 * url syntax: udp://host:port[?option=val...]
413 * option: 'ttl=n' : set the ttl value (for multicast only)
414 * 'localport=n' : set the local port
415 * 'pkt_size=n' : set max packet size
416 * 'reuse=1' : enable reusing the socket
417 * 'overrun_nonfatal=1': survive in case of circular buffer overrun
419 * @param h media file context
420 * @param uri of the remote server
421 * @return zero if no error.
423 int ff_udp_set_remote_url(URLContext *h, const char *uri)
425 UDPContext *s = h->priv_data;
426 char hostname[256], buf[10];
430 av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
432 /* set the destination address */
433 s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port);
434 if (s->dest_addr_len < 0) {
437 s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
438 p = strchr(uri, '?');
440 if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
441 int was_connected = s->is_connected;
442 s->is_connected = strtol(buf, NULL, 10);
443 if (s->is_connected && !was_connected) {
444 if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
447 log_net_error(h, AV_LOG_ERROR, "connect");
458 * Return the local port used by the UDP connection
459 * @param h media file context
460 * @return the local port number
462 int ff_udp_get_local_port(URLContext *h)
464 UDPContext *s = h->priv_data;
465 return s->local_port;
469 * Return the udp file handle for select() usage to wait for several RTP
470 * streams at the same time.
471 * @param h media file context
473 static int udp_get_file_handle(URLContext *h)
475 UDPContext *s = h->priv_data;
479 #if HAVE_PTHREAD_CANCEL
480 static void *circular_buffer_task( void *_URLContext)
482 URLContext *h = _URLContext;
483 UDPContext *s = h->priv_data;
486 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
487 pthread_mutex_lock(&s->mutex);
488 if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
489 av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
490 s->circular_buffer_error = AVERROR(EIO);
496 pthread_mutex_unlock(&s->mutex);
497 /* Blocking operations are always cancellation points;
498 see "General Information" / "Thread Cancelation Overview"
500 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
501 len = recv(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0);
502 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
503 pthread_mutex_lock(&s->mutex);
505 if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) {
506 s->circular_buffer_error = ff_neterrno();
511 AV_WL32(s->tmp, len);
513 if(av_fifo_space(s->fifo) < len + 4) {
515 if (s->overrun_nonfatal) {
516 av_log(h, AV_LOG_WARNING, "Circular buffer overrun. "
517 "Surviving due to overrun_nonfatal option\n");
520 av_log(h, AV_LOG_ERROR, "Circular buffer overrun. "
521 "To avoid, increase fifo_size URL option. "
522 "To survive in such case, use overrun_nonfatal option\n");
523 s->circular_buffer_error = AVERROR(EIO);
527 av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL);
528 pthread_cond_signal(&s->cond);
532 pthread_cond_signal(&s->cond);
533 pthread_mutex_unlock(&s->mutex);
538 static int parse_source_list(char *buf, char **sources, int *num_sources,
545 char *next = strchr(source_start, ',');
548 sources[*num_sources] = av_strdup(source_start);
549 if (!sources[*num_sources])
550 return AVERROR(ENOMEM);
551 source_start = next + 1;
553 if (*num_sources >= max_sources || !next)
559 /* put it in UDP context */
560 /* return non zero if error */
561 static int udp_open(URLContext *h, const char *uri, int flags)
563 char hostname[1024], localaddr[1024] = "";
564 int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1;
565 UDPContext *s = h->priv_data;
569 struct sockaddr_storage my_addr;
571 int i, num_include_sources = 0, num_exclude_sources = 0;
572 char *include_sources[32], *exclude_sources[32];
576 is_output = !(flags & AVIO_FLAG_READ);
577 if (s->buffer_size < 0)
578 s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
581 if (parse_source_list(s->sources, include_sources,
582 &num_include_sources,
583 FF_ARRAY_ELEMS(include_sources)))
588 if (parse_source_list(s->block, exclude_sources, &num_exclude_sources,
589 FF_ARRAY_ELEMS(exclude_sources)))
594 h->max_packet_size = s->pkt_size;
596 p = strchr(uri, '?');
598 if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
600 s->reuse_socket = strtol(buf, &endptr, 10);
601 /* assume if no digits were found it is a request to enable it */
605 if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
607 s->overrun_nonfatal = strtol(buf, &endptr, 10);
608 /* assume if no digits were found it is a request to enable it */
610 s->overrun_nonfatal = 1;
611 if (!HAVE_PTHREAD_CANCEL)
612 av_log(h, AV_LOG_WARNING,
613 "'overrun_nonfatal' option was set but it is not supported "
614 "on this build (pthread support is required)\n");
616 if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
617 s->ttl = strtol(buf, NULL, 10);
619 if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
620 s->udplite_coverage = strtol(buf, NULL, 10);
622 if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
623 s->local_port = strtol(buf, NULL, 10);
625 if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
626 s->pkt_size = strtol(buf, NULL, 10);
628 if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
629 s->buffer_size = strtol(buf, NULL, 10);
631 if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
632 s->is_connected = strtol(buf, NULL, 10);
634 if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
635 dscp = strtol(buf, NULL, 10);
637 if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) {
638 s->circular_buffer_size = strtol(buf, NULL, 10);
639 if (!HAVE_PTHREAD_CANCEL)
640 av_log(h, AV_LOG_WARNING,
641 "'circular_buffer_size' option was set but it is not supported "
642 "on this build (pthread support is required)\n");
644 if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
645 av_strlcpy(localaddr, buf, sizeof(localaddr));
647 if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
648 if (parse_source_list(buf, include_sources, &num_include_sources,
649 FF_ARRAY_ELEMS(include_sources)))
652 if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
653 if (parse_source_list(buf, exclude_sources, &num_exclude_sources,
654 FF_ARRAY_ELEMS(exclude_sources)))
657 if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
658 s->timeout = strtol(buf, NULL, 10);
659 if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p))
660 s->is_broadcast = strtol(buf, NULL, 10);
662 /* handling needed to support options picking from both AVOption and URL */
663 s->circular_buffer_size *= 188;
664 if (flags & AVIO_FLAG_WRITE) {
665 h->max_packet_size = s->pkt_size;
667 h->max_packet_size = UDP_MAX_PKT_SIZE;
669 h->rw_timeout = s->timeout;
671 /* fill the dest addr */
672 av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
674 /* XXX: fix av_url_split */
675 if (hostname[0] == '\0' || hostname[0] == '?') {
676 /* only accepts null hostname if input */
677 if (!(flags & AVIO_FLAG_READ))
680 if (ff_udp_set_remote_url(h, uri) < 0)
684 if ((s->is_multicast || s->local_port <= 0) && (h->flags & AVIO_FLAG_READ))
685 s->local_port = port;
688 udp_fd = udp_socket_create(s, &my_addr, &len, localaddr);
690 udp_fd = udp_socket_create(s, &my_addr, &len, s->localaddr);
694 s->local_addr_storage=my_addr; //store for future multicast join
696 /* Follow the requested reuse option, unless it's multicast in which
697 * case enable reuse unless explicitly disabled.
699 if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
701 if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
705 if (s->is_broadcast) {
707 if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
712 /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
713 * The receiver coverage has to be less than or equal to the sender coverage.
714 * Otherwise, the receiver will drop all packets.
716 if (s->udplite_coverage) {
717 if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
718 av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
720 if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
721 av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
726 if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
730 /* If multicast, try binding the multicast address first, to avoid
731 * receiving UDP packets from other sources aimed at the same UDP
732 * port. This fails on windows. This makes sending to the same address
733 * using sendto() fail, so only do it if we're opened in read-only mode. */
734 if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
735 bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
737 /* bind to the local address if not multicast or if the multicast
739 /* the bind is needed to give a port to the socket now */
740 if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
741 log_net_error(h, AV_LOG_ERROR, "bind failed");
745 len = sizeof(my_addr);
746 getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
747 s->local_port = udp_port(&my_addr, len);
749 if (s->is_multicast) {
750 if (h->flags & AVIO_FLAG_WRITE) {
752 if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
755 if (h->flags & AVIO_FLAG_READ) {
757 if (num_include_sources && num_exclude_sources) {
758 av_log(h, AV_LOG_ERROR, "Simultaneously including and excluding multicast sources is not supported\n");
761 if (num_include_sources) {
762 if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, include_sources, num_include_sources, 1) < 0)
765 if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
768 if (num_exclude_sources) {
769 if (udp_set_multicast_sources(udp_fd, (struct sockaddr *)&s->dest_addr, s->dest_addr_len, exclude_sources, num_exclude_sources, 0) < 0)
776 /* limit the tx buf size to limit latency */
777 tmp = s->buffer_size;
778 if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
779 log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
783 /* set udp recv buffer size to the requested value (default 64K) */
784 tmp = s->buffer_size;
785 if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
786 log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
789 if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
790 log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
792 av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
793 if(tmp < s->buffer_size)
794 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);
797 /* make the socket non-blocking */
798 ff_socket_nonblock(udp_fd, 1);
800 if (s->is_connected) {
801 if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
802 log_net_error(h, AV_LOG_ERROR, "connect");
807 for (i = 0; i < num_include_sources; i++)
808 av_freep(&include_sources[i]);
809 for (i = 0; i < num_exclude_sources; i++)
810 av_freep(&exclude_sources[i]);
814 #if HAVE_PTHREAD_CANCEL
815 if (!is_output && s->circular_buffer_size) {
818 /* start the task going */
819 s->fifo = av_fifo_alloc(s->circular_buffer_size);
820 ret = pthread_mutex_init(&s->mutex, NULL);
822 av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
825 ret = pthread_cond_init(&s->cond, NULL);
827 av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
830 ret = pthread_create(&s->circular_buffer_thread, NULL, circular_buffer_task, h);
832 av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
835 s->thread_started = 1;
840 #if HAVE_PTHREAD_CANCEL
842 pthread_cond_destroy(&s->cond);
844 pthread_mutex_destroy(&s->mutex);
849 av_fifo_freep(&s->fifo);
850 for (i = 0; i < num_include_sources; i++)
851 av_freep(&include_sources[i]);
852 for (i = 0; i < num_exclude_sources; i++)
853 av_freep(&exclude_sources[i]);
857 static int udplite_open(URLContext *h, const char *uri, int flags)
859 UDPContext *s = h->priv_data;
861 // set default checksum coverage
862 s->udplite_coverage = UDP_HEADER_SIZE;
864 return udp_open(h, uri, flags);
867 static int udp_read(URLContext *h, uint8_t *buf, int size)
869 UDPContext *s = h->priv_data;
871 #if HAVE_PTHREAD_CANCEL
872 int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
875 pthread_mutex_lock(&s->mutex);
877 avail = av_fifo_size(s->fifo);
878 if (avail) { // >=size) {
881 av_fifo_generic_read(s->fifo, tmp, 4, NULL);
884 av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
888 av_fifo_generic_read(s->fifo, buf, avail, NULL);
889 av_fifo_drain(s->fifo, AV_RL32(tmp) - avail);
890 pthread_mutex_unlock(&s->mutex);
892 } else if(s->circular_buffer_error){
893 int err = s->circular_buffer_error;
894 pthread_mutex_unlock(&s->mutex);
896 } else if(nonblock) {
897 pthread_mutex_unlock(&s->mutex);
898 return AVERROR(EAGAIN);
901 /* FIXME: using the monotonic clock would be better,
902 but it does not exist on all supported platforms. */
903 int64_t t = av_gettime() + 100000;
904 struct timespec tv = { .tv_sec = t / 1000000,
905 .tv_nsec = (t % 1000000) * 1000 };
906 if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) {
907 pthread_mutex_unlock(&s->mutex);
908 return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno);
916 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
917 ret = ff_network_wait_fd(s->udp_fd, 0);
921 ret = recv(s->udp_fd, buf, size, 0);
923 return ret < 0 ? ff_neterrno() : ret;
926 static int udp_write(URLContext *h, const uint8_t *buf, int size)
928 UDPContext *s = h->priv_data;
931 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
932 ret = ff_network_wait_fd(s->udp_fd, 1);
937 if (!s->is_connected) {
938 ret = sendto (s->udp_fd, buf, size, 0,
939 (struct sockaddr *) &s->dest_addr,
942 ret = send(s->udp_fd, buf, size, 0);
944 return ret < 0 ? ff_neterrno() : ret;
947 static int udp_close(URLContext *h)
949 UDPContext *s = h->priv_data;
951 if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
952 udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage);
953 closesocket(s->udp_fd);
954 #if HAVE_PTHREAD_CANCEL
955 if (s->thread_started) {
957 pthread_cancel(s->circular_buffer_thread);
958 ret = pthread_join(s->circular_buffer_thread, NULL);
960 av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
961 pthread_mutex_destroy(&s->mutex);
962 pthread_cond_destroy(&s->cond);
965 av_fifo_freep(&s->fifo);
969 URLProtocol ff_udp_protocol = {
971 .url_open = udp_open,
972 .url_read = udp_read,
973 .url_write = udp_write,
974 .url_close = udp_close,
975 .url_get_file_handle = udp_get_file_handle,
976 .priv_data_size = sizeof(UDPContext),
977 .priv_data_class = &udp_class,
978 .flags = URL_PROTOCOL_FLAG_NETWORK,
981 URLProtocol ff_udplite_protocol = {
983 .url_open = udplite_open,
984 .url_read = udp_read,
985 .url_write = udp_write,
986 .url_close = udp_close,
987 .url_get_file_handle = udp_get_file_handle,
988 .priv_data_size = sizeof(UDPContext),
989 .priv_data_class = &udplite_context_class,
990 .flags = URL_PROTOCOL_FLAG_NETWORK,