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 _DEFAULT_SOURCE
28 #define _BSD_SOURCE /* Needed for using struct ip_mreq with recent glibc */
31 #include "avio_internal.h"
32 #include "libavutil/parseutils.h"
33 #include "libavutil/fifo.h"
34 #include "libavutil/intreadwrite.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/log.h"
38 #include "libavutil/time.h"
41 #include "os_support.h"
47 /* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite.
48 * So, we provide a fallback here.
50 #define UDPLITE_SEND_CSCOV 10
51 #define UDPLITE_RECV_CSCOV 11
54 #ifndef IPPROTO_UDPLITE
55 #define IPPROTO_UDPLITE 136
58 #if HAVE_PTHREAD_CANCEL
62 #ifndef HAVE_PTHREAD_CANCEL
63 #define HAVE_PTHREAD_CANCEL 0
66 #ifndef IPV6_ADD_MEMBERSHIP
67 #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
68 #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
71 #define UDP_TX_BUF_SIZE 32768
72 #define UDP_MAX_PKT_SIZE 65536
73 #define UDP_HEADER_SIZE 8
75 typedef struct UDPContext {
87 struct sockaddr_storage dest_addr;
91 /* Circular Buffer variables for use in UDP receive code */
92 int circular_buffer_size;
94 int circular_buffer_error;
95 #if HAVE_PTHREAD_CANCEL
96 pthread_t circular_buffer_thread;
97 pthread_mutex_t mutex;
101 uint8_t tmp[UDP_MAX_PKT_SIZE+4];
105 struct sockaddr_storage local_addr_storage;
110 #define OFFSET(x) offsetof(UDPContext, x)
111 #define D AV_OPT_FLAG_DECODING_PARAM
112 #define E AV_OPT_FLAG_ENCODING_PARAM
113 static const AVOption options[] = {
114 { "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
115 { "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E },
116 { "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
117 { "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
118 { "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 },
119 { "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E },
120 { "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D|E },
121 { "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
122 { "broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
123 { "ttl", "Time to live (multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, INT_MAX, E },
124 { "connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
125 { "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 },
126 { "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D },
127 { "timeout", "set raise error timeout (only in read mode)", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, D },
128 { "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
129 { "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
133 static const AVClass udp_class = {
135 .item_name = av_default_item_name,
137 .version = LIBAVUTIL_VERSION_INT,
140 static const AVClass udplite_context_class = {
141 .class_name = "udplite",
142 .item_name = av_default_item_name,
144 .version = LIBAVUTIL_VERSION_INT,
147 static void log_net_error(void *ctx, int level, const char* prefix)
150 av_strerror(ff_neterrno(), errbuf, sizeof(errbuf));
151 av_log(ctx, level, "%s: %s\n", prefix, errbuf);
154 static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
155 struct sockaddr *addr)
157 #ifdef IP_MULTICAST_TTL
158 if (addr->sa_family == AF_INET) {
159 if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
160 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)");
165 #if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
166 if (addr->sa_family == AF_INET6) {
167 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
168 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS)");
176 static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
178 #ifdef IP_ADD_MEMBERSHIP
179 if (addr->sa_family == AF_INET) {
182 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
184 mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
186 mreq.imr_interface.s_addr= INADDR_ANY;
187 if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
188 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
193 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
194 if (addr->sa_family == AF_INET6) {
195 struct ipv6_mreq mreq6;
197 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
198 mreq6.ipv6mr_interface= 0;
199 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
200 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
208 static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,struct sockaddr *local_addr)
210 #ifdef IP_DROP_MEMBERSHIP
211 if (addr->sa_family == AF_INET) {
214 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
216 mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
218 mreq.imr_interface.s_addr= INADDR_ANY;
219 if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
220 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
225 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
226 if (addr->sa_family == AF_INET6) {
227 struct ipv6_mreq mreq6;
229 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
230 mreq6.ipv6mr_interface= 0;
231 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
232 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
240 static struct addrinfo *udp_resolve_host(URLContext *h,
241 const char *hostname, int port,
242 int type, int family, int flags)
244 struct addrinfo hints = { 0 }, *res = 0;
247 const char *node = 0, *service = "0";
250 snprintf(sport, sizeof(sport), "%d", port);
253 if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
256 hints.ai_socktype = type;
257 hints.ai_family = family;
258 hints.ai_flags = flags;
259 if ((error = getaddrinfo(node, service, &hints, &res))) {
261 av_log(h, AV_LOG_ERROR, "getaddrinfo(%s, %s): %s\n",
262 node ? node : "unknown",
263 service ? service : "unknown",
264 gai_strerror(error));
270 static int udp_set_multicast_sources(URLContext *h,
271 int sockfd, struct sockaddr *addr,
272 int addr_len, char **sources,
273 int nb_sources, int include)
275 #if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32)
276 /* These ones are available in the microsoft SDK, but don't seem to work
277 * as on linux, so just prefer the v4-only approach there for now. */
279 for (i = 0; i < nb_sources; i++) {
280 struct group_source_req mreqs;
281 int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
282 struct addrinfo *sourceaddr = udp_resolve_host(h, sources[i], 0,
283 SOCK_DGRAM, AF_UNSPEC,
286 return AVERROR(ENOENT);
288 mreqs.gsr_interface = 0;
289 memcpy(&mreqs.gsr_group, addr, addr_len);
290 memcpy(&mreqs.gsr_source, sourceaddr->ai_addr, sourceaddr->ai_addrlen);
291 freeaddrinfo(sourceaddr);
293 if (setsockopt(sockfd, level,
294 include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
295 (const void *)&mreqs, sizeof(mreqs)) < 0) {
297 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
299 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
300 return ff_neterrno();
303 #elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
305 if (addr->sa_family != AF_INET) {
306 av_log(NULL, AV_LOG_ERROR,
307 "Setting multicast sources only supported for IPv4\n");
308 return AVERROR(EINVAL);
310 for (i = 0; i < nb_sources; i++) {
311 struct ip_mreq_source mreqs;
312 struct addrinfo *sourceaddr = udp_resolve_host(h, sources[i], 0,
313 SOCK_DGRAM, AF_UNSPEC,
316 return AVERROR(ENOENT);
317 if (sourceaddr->ai_addr->sa_family != AF_INET) {
318 freeaddrinfo(sourceaddr);
319 av_log(NULL, AV_LOG_ERROR, "%s is of incorrect protocol family\n",
321 return AVERROR(EINVAL);
324 mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
325 mreqs.imr_interface.s_addr = INADDR_ANY;
326 mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)sourceaddr->ai_addr)->sin_addr.s_addr;
327 freeaddrinfo(sourceaddr);
329 if (setsockopt(sockfd, IPPROTO_IP,
330 include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
331 (const void *)&mreqs, sizeof(mreqs)) < 0) {
333 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
335 log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
336 return ff_neterrno();
340 return AVERROR(ENOSYS);
344 static int udp_set_url(URLContext *h,
345 struct sockaddr_storage *addr,
346 const char *hostname, int port)
348 struct addrinfo *res0;
351 res0 = udp_resolve_host(h, hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
352 if (!res0) return AVERROR(EIO);
353 memcpy(addr, res0->ai_addr, res0->ai_addrlen);
354 addr_len = res0->ai_addrlen;
360 static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr,
361 socklen_t *addr_len, const char *localaddr)
363 UDPContext *s = h->priv_data;
365 struct addrinfo *res0, *res;
366 int family = AF_UNSPEC;
368 if (((struct sockaddr *) &s->dest_addr)->sa_family)
369 family = ((struct sockaddr *) &s->dest_addr)->sa_family;
370 res0 = udp_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL,
372 SOCK_DGRAM, family, AI_PASSIVE);
375 for (res = res0; res; res=res->ai_next) {
376 if (s->udplite_coverage)
377 udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE);
379 udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0);
380 if (udp_fd != -1) break;
381 log_net_error(NULL, AV_LOG_ERROR, "socket");
387 memcpy(addr, res->ai_addr, res->ai_addrlen);
388 *addr_len = res->ai_addrlen;
402 static int udp_port(struct sockaddr_storage *addr, int addr_len)
404 char sbuf[sizeof(int)*3+1];
407 if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
408 av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
412 return strtol(sbuf, NULL, 10);
417 * If no filename is given to av_open_input_file because you want to
418 * get the local port first, then you must call this function to set
419 * the remote server address.
421 * url syntax: udp://host:port[?option=val...]
422 * option: 'ttl=n' : set the ttl value (for multicast only)
423 * 'localport=n' : set the local port
424 * 'pkt_size=n' : set max packet size
425 * 'reuse=1' : enable reusing the socket
426 * 'overrun_nonfatal=1': survive in case of circular buffer overrun
428 * @param h media file context
429 * @param uri of the remote server
430 * @return zero if no error.
432 int ff_udp_set_remote_url(URLContext *h, const char *uri)
434 UDPContext *s = h->priv_data;
435 char hostname[256], buf[10];
439 av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
441 /* set the destination address */
442 s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port);
443 if (s->dest_addr_len < 0) {
446 s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
447 p = strchr(uri, '?');
449 if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
450 int was_connected = s->is_connected;
451 s->is_connected = strtol(buf, NULL, 10);
452 if (s->is_connected && !was_connected) {
453 if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
456 log_net_error(h, AV_LOG_ERROR, "connect");
467 * Return the local port used by the UDP connection
468 * @param h media file context
469 * @return the local port number
471 int ff_udp_get_local_port(URLContext *h)
473 UDPContext *s = h->priv_data;
474 return s->local_port;
478 * Return the udp file handle for select() usage to wait for several RTP
479 * streams at the same time.
480 * @param h media file context
482 static int udp_get_file_handle(URLContext *h)
484 UDPContext *s = h->priv_data;
488 #if HAVE_PTHREAD_CANCEL
489 static void *circular_buffer_task( void *_URLContext)
491 URLContext *h = _URLContext;
492 UDPContext *s = h->priv_data;
495 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
496 pthread_mutex_lock(&s->mutex);
497 if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
498 av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
499 s->circular_buffer_error = AVERROR(EIO);
505 pthread_mutex_unlock(&s->mutex);
506 /* Blocking operations are always cancellation points;
507 see "General Information" / "Thread Cancelation Overview"
509 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
510 len = recv(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0);
511 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
512 pthread_mutex_lock(&s->mutex);
514 if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) {
515 s->circular_buffer_error = ff_neterrno();
520 AV_WL32(s->tmp, len);
522 if(av_fifo_space(s->fifo) < len + 4) {
524 if (s->overrun_nonfatal) {
525 av_log(h, AV_LOG_WARNING, "Circular buffer overrun. "
526 "Surviving due to overrun_nonfatal option\n");
529 av_log(h, AV_LOG_ERROR, "Circular buffer overrun. "
530 "To avoid, increase fifo_size URL option. "
531 "To survive in such case, use overrun_nonfatal option\n");
532 s->circular_buffer_error = AVERROR(EIO);
536 av_fifo_generic_write(s->fifo, s->tmp, len+4, NULL);
537 pthread_cond_signal(&s->cond);
541 pthread_cond_signal(&s->cond);
542 pthread_mutex_unlock(&s->mutex);
547 static int parse_source_list(char *buf, char **sources, int *num_sources,
554 char *next = strchr(source_start, ',');
557 sources[*num_sources] = av_strdup(source_start);
558 if (!sources[*num_sources])
559 return AVERROR(ENOMEM);
560 source_start = next + 1;
562 if (*num_sources >= max_sources || !next)
568 /* put it in UDP context */
569 /* return non zero if error */
570 static int udp_open(URLContext *h, const char *uri, int flags)
572 char hostname[1024], localaddr[1024] = "";
573 int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1;
574 UDPContext *s = h->priv_data;
578 struct sockaddr_storage my_addr;
580 int i, num_include_sources = 0, num_exclude_sources = 0;
581 char *include_sources[32], *exclude_sources[32];
585 is_output = !(flags & AVIO_FLAG_READ);
586 if (s->buffer_size < 0)
587 s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE;
590 if (parse_source_list(s->sources, include_sources,
591 &num_include_sources,
592 FF_ARRAY_ELEMS(include_sources)))
597 if (parse_source_list(s->block, exclude_sources, &num_exclude_sources,
598 FF_ARRAY_ELEMS(exclude_sources)))
603 h->max_packet_size = s->pkt_size;
605 p = strchr(uri, '?');
607 if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
609 s->reuse_socket = strtol(buf, &endptr, 10);
610 /* assume if no digits were found it is a request to enable it */
614 if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
616 s->overrun_nonfatal = strtol(buf, &endptr, 10);
617 /* assume if no digits were found it is a request to enable it */
619 s->overrun_nonfatal = 1;
620 if (!HAVE_PTHREAD_CANCEL)
621 av_log(h, AV_LOG_WARNING,
622 "'overrun_nonfatal' option was set but it is not supported "
623 "on this build (pthread support is required)\n");
625 if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
626 s->ttl = strtol(buf, NULL, 10);
628 if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
629 s->udplite_coverage = strtol(buf, NULL, 10);
631 if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
632 s->local_port = strtol(buf, NULL, 10);
634 if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
635 s->pkt_size = strtol(buf, NULL, 10);
637 if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
638 s->buffer_size = strtol(buf, NULL, 10);
640 if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
641 s->is_connected = strtol(buf, NULL, 10);
643 if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
644 dscp = strtol(buf, NULL, 10);
646 if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) {
647 s->circular_buffer_size = strtol(buf, NULL, 10);
648 if (!HAVE_PTHREAD_CANCEL)
649 av_log(h, AV_LOG_WARNING,
650 "'circular_buffer_size' option was set but it is not supported "
651 "on this build (pthread support is required)\n");
653 if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
654 av_strlcpy(localaddr, buf, sizeof(localaddr));
656 if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
657 if (parse_source_list(buf, include_sources, &num_include_sources,
658 FF_ARRAY_ELEMS(include_sources)))
661 if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
662 if (parse_source_list(buf, exclude_sources, &num_exclude_sources,
663 FF_ARRAY_ELEMS(exclude_sources)))
666 if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
667 s->timeout = strtol(buf, NULL, 10);
668 if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p))
669 s->is_broadcast = strtol(buf, NULL, 10);
671 /* handling needed to support options picking from both AVOption and URL */
672 s->circular_buffer_size *= 188;
673 if (flags & AVIO_FLAG_WRITE) {
674 h->max_packet_size = s->pkt_size;
676 h->max_packet_size = UDP_MAX_PKT_SIZE;
678 h->rw_timeout = s->timeout;
680 /* fill the dest addr */
681 av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
683 /* XXX: fix av_url_split */
684 if (hostname[0] == '\0' || hostname[0] == '?') {
685 /* only accepts null hostname if input */
686 if (!(flags & AVIO_FLAG_READ))
689 if (ff_udp_set_remote_url(h, uri) < 0)
693 if ((s->is_multicast || s->local_port <= 0) && (h->flags & AVIO_FLAG_READ))
694 s->local_port = port;
697 udp_fd = udp_socket_create(h, &my_addr, &len, localaddr);
699 udp_fd = udp_socket_create(h, &my_addr, &len, s->localaddr);
703 s->local_addr_storage=my_addr; //store for future multicast join
705 /* Follow the requested reuse option, unless it's multicast in which
706 * case enable reuse unless explicitly disabled.
708 if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
710 if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
714 if (s->is_broadcast) {
716 if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0)
721 /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
722 * The receiver coverage has to be less than or equal to the sender coverage.
723 * Otherwise, the receiver will drop all packets.
725 if (s->udplite_coverage) {
726 if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
727 av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
729 if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
730 av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
735 if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0)
739 /* If multicast, try binding the multicast address first, to avoid
740 * receiving UDP packets from other sources aimed at the same UDP
741 * port. This fails on windows. This makes sending to the same address
742 * using sendto() fail, so only do it if we're opened in read-only mode. */
743 if (s->is_multicast && !(h->flags & AVIO_FLAG_WRITE)) {
744 bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
746 /* bind to the local address if not multicast or if the multicast
748 /* the bind is needed to give a port to the socket now */
749 if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
750 log_net_error(h, AV_LOG_ERROR, "bind failed");
754 len = sizeof(my_addr);
755 getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
756 s->local_port = udp_port(&my_addr, len);
758 if (s->is_multicast) {
759 if (h->flags & AVIO_FLAG_WRITE) {
761 if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
764 if (h->flags & AVIO_FLAG_READ) {
766 if (num_include_sources && num_exclude_sources) {
767 av_log(h, AV_LOG_ERROR, "Simultaneously including and excluding multicast sources is not supported\n");
770 if (num_include_sources) {
771 if (udp_set_multicast_sources(h, udp_fd,
772 (struct sockaddr *)&s->dest_addr,
775 num_include_sources, 1) < 0)
778 if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage) < 0)
781 if (num_exclude_sources) {
782 if (udp_set_multicast_sources(h, udp_fd,
783 (struct sockaddr *)&s->dest_addr,
786 num_exclude_sources, 0) < 0)
793 /* limit the tx buf size to limit latency */
794 tmp = s->buffer_size;
795 if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
796 log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
800 /* set udp recv buffer size to the requested value (default 64K) */
801 tmp = s->buffer_size;
802 if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
803 log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
806 if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
807 log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
809 av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
810 if(tmp < s->buffer_size)
811 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);
814 /* make the socket non-blocking */
815 ff_socket_nonblock(udp_fd, 1);
817 if (s->is_connected) {
818 if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
819 log_net_error(h, AV_LOG_ERROR, "connect");
824 for (i = 0; i < num_include_sources; i++)
825 av_freep(&include_sources[i]);
826 for (i = 0; i < num_exclude_sources; i++)
827 av_freep(&exclude_sources[i]);
831 #if HAVE_PTHREAD_CANCEL
832 if (!is_output && s->circular_buffer_size) {
835 /* start the task going */
836 s->fifo = av_fifo_alloc(s->circular_buffer_size);
837 ret = pthread_mutex_init(&s->mutex, NULL);
839 av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
842 ret = pthread_cond_init(&s->cond, NULL);
844 av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
847 ret = pthread_create(&s->circular_buffer_thread, NULL, circular_buffer_task, h);
849 av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
852 s->thread_started = 1;
857 #if HAVE_PTHREAD_CANCEL
859 pthread_cond_destroy(&s->cond);
861 pthread_mutex_destroy(&s->mutex);
866 av_fifo_freep(&s->fifo);
867 for (i = 0; i < num_include_sources; i++)
868 av_freep(&include_sources[i]);
869 for (i = 0; i < num_exclude_sources; i++)
870 av_freep(&exclude_sources[i]);
874 static int udplite_open(URLContext *h, const char *uri, int flags)
876 UDPContext *s = h->priv_data;
878 // set default checksum coverage
879 s->udplite_coverage = UDP_HEADER_SIZE;
881 return udp_open(h, uri, flags);
884 static int udp_read(URLContext *h, uint8_t *buf, int size)
886 UDPContext *s = h->priv_data;
888 #if HAVE_PTHREAD_CANCEL
889 int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
892 pthread_mutex_lock(&s->mutex);
894 avail = av_fifo_size(s->fifo);
895 if (avail) { // >=size) {
898 av_fifo_generic_read(s->fifo, tmp, 4, NULL);
901 av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
905 av_fifo_generic_read(s->fifo, buf, avail, NULL);
906 av_fifo_drain(s->fifo, AV_RL32(tmp) - avail);
907 pthread_mutex_unlock(&s->mutex);
909 } else if(s->circular_buffer_error){
910 int err = s->circular_buffer_error;
911 pthread_mutex_unlock(&s->mutex);
913 } else if(nonblock) {
914 pthread_mutex_unlock(&s->mutex);
915 return AVERROR(EAGAIN);
918 /* FIXME: using the monotonic clock would be better,
919 but it does not exist on all supported platforms. */
920 int64_t t = av_gettime() + 100000;
921 struct timespec tv = { .tv_sec = t / 1000000,
922 .tv_nsec = (t % 1000000) * 1000 };
923 if (pthread_cond_timedwait(&s->cond, &s->mutex, &tv) < 0) {
924 pthread_mutex_unlock(&s->mutex);
925 return AVERROR(errno == ETIMEDOUT ? EAGAIN : errno);
933 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
934 ret = ff_network_wait_fd(s->udp_fd, 0);
938 ret = recv(s->udp_fd, buf, size, 0);
940 return ret < 0 ? ff_neterrno() : ret;
943 static int udp_write(URLContext *h, const uint8_t *buf, int size)
945 UDPContext *s = h->priv_data;
948 if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
949 ret = ff_network_wait_fd(s->udp_fd, 1);
954 if (!s->is_connected) {
955 ret = sendto (s->udp_fd, buf, size, 0,
956 (struct sockaddr *) &s->dest_addr,
959 ret = send(s->udp_fd, buf, size, 0);
961 return ret < 0 ? ff_neterrno() : ret;
964 static int udp_close(URLContext *h)
966 UDPContext *s = h->priv_data;
968 if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
969 udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,(struct sockaddr *)&s->local_addr_storage);
970 closesocket(s->udp_fd);
971 #if HAVE_PTHREAD_CANCEL
972 if (s->thread_started) {
974 pthread_cancel(s->circular_buffer_thread);
975 ret = pthread_join(s->circular_buffer_thread, NULL);
977 av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
978 pthread_mutex_destroy(&s->mutex);
979 pthread_cond_destroy(&s->cond);
982 av_fifo_freep(&s->fifo);
986 const URLProtocol ff_udp_protocol = {
988 .url_open = udp_open,
989 .url_read = udp_read,
990 .url_write = udp_write,
991 .url_close = udp_close,
992 .url_get_file_handle = udp_get_file_handle,
993 .priv_data_size = sizeof(UDPContext),
994 .priv_data_class = &udp_class,
995 .flags = URL_PROTOCOL_FLAG_NETWORK,
998 const URLProtocol ff_udplite_protocol = {
1000 .url_open = udplite_open,
1001 .url_read = udp_read,
1002 .url_write = udp_write,
1003 .url_close = udp_close,
1004 .url_get_file_handle = udp_get_file_handle,
1005 .priv_data_size = sizeof(UDPContext),
1006 .priv_data_class = &udplite_context_class,
1007 .flags = URL_PROTOCOL_FLAG_NETWORK,