FFmpeg coverage

Line	Branch	Exec	Source
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 "libavutil/avassert.h"
32			#include "libavutil/mem.h"
33			#include "libavutil/parseutils.h"
34			#include "libavutil/fifo.h"
35			#include "libavutil/intreadwrite.h"
36			#include "libavutil/opt.h"
37			#include "libavutil/log.h"
38			#include "libavutil/time.h"
39			#include "network.h"
40			#include "os_support.h"
41			#include "url.h"
42			#include "ip.h"
43
44			#ifdef __APPLE__
45			#include "TargetConditionals.h"
46			#endif
47
48			#if HAVE_UDPLITE_H
49			#include "udplite.h"
50			#else
51			/* On many Linux systems, udplite.h is missing but the kernel supports UDP-Lite.
52			* So, we provide a fallback here.
53			*/
54			#define UDPLITE_SEND_CSCOV 10
55			#define UDPLITE_RECV_CSCOV 11
56			#endif
57
58			#ifndef IPPROTO_UDPLITE
59			#define IPPROTO_UDPLITE 136
60			#endif
61
62			#if HAVE_W32THREADS
63			#undef HAVE_PTHREAD_CANCEL
64			#define HAVE_PTHREAD_CANCEL 1
65			#endif
66
67			#if HAVE_PTHREAD_CANCEL
68			#include "libavutil/thread.h"
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_RX_BUF_SIZE 393216
78			#define UDP_MAX_PKT_SIZE 65536
79			#define UDP_HEADER_SIZE 8
80
81			typedef struct UDPContext {
82			const AVClass *class;
83			int udp_fd;
84			int ttl;
85			int udplite_coverage;
86			int buffer_size;
87			int pkt_size;
88			int is_multicast;
89			int is_broadcast;
90			int local_port;
91			int reuse_socket;
92			int overrun_nonfatal;
93			struct sockaddr_storage dest_addr;
94			int dest_addr_len;
95			int is_connected;
96
97			/* Circular Buffer variables for use in UDP receive code */
98			int circular_buffer_size;
99			AVFifo *fifo;
100			int circular_buffer_error;
101			int64_t bitrate; /* number of bits to send per second */
102			int64_t burst_bits;
103			int close_req;
104			#if HAVE_PTHREAD_CANCEL
105			pthread_t circular_buffer_thread;
106			pthread_mutex_t mutex;
107			pthread_cond_t cond;
108			int thread_started;
109			#endif
110			uint8_t tmp[UDP_MAX_PKT_SIZE+4];
111			int remaining_in_dg;
112			char *localaddr;
113			int timeout;
114			struct sockaddr_storage local_addr_storage;
115			char *sources;
116			char *block;
117			IPSourceFilters filters;
118			} UDPContext;
119
120			#define OFFSET(x) offsetof(UDPContext, x)
121			#define D AV_OPT_FLAG_DECODING_PARAM
122			#define E AV_OPT_FLAG_ENCODING_PARAM
123			static const AVOption options[] = {
124			{ "buffer_size", "System data size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
125			{ "bitrate", "Bits to send per second", OFFSET(bitrate), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, .flags = E },
126			{ "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 },
127			{ "localport", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, D|E },
128			{ "local_port", "Local port", OFFSET(local_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
129			{ "localaddr", "Local address", OFFSET(localaddr), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
130			{ "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 },
131			{ "pkt_size", "Maximum UDP packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, .flags = D|E },
132			{ "reuse", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, D|E },
133			{ "reuse_socket", "explicitly allow reusing UDP sockets", OFFSET(reuse_socket), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, .flags = D|E },
134			{ "broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
135			{ "ttl", "Time to live (multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = 16 }, 0, 255, E },
136			{ "connect", "set if connect() should be called on socket", OFFSET(is_connected), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
137			{ "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 },
138			{ "overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, D },
139			{ "timeout", "set raise error timeout, in microseconds (only in read mode)",OFFSET(timeout), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, D },
140			{ "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
141			{ "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
142			{ NULL }
143			};
144
145			static const AVClass udp_class = {
146			.class_name = "udp",
147			.item_name = av_default_item_name,
148			.option = options,
149			.version = LIBAVUTIL_VERSION_INT,
150			};
151
152			static const AVClass udplite_context_class = {
153			.class_name = "udplite",
154			.item_name = av_default_item_name,
155			.option = options,
156			.version = LIBAVUTIL_VERSION_INT,
157			};
158
159		✗	static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
160			struct sockaddr *addr,
161			void *logctx)
162			{
163			int protocol, cmd;
164
165			/* There is some confusion in the world whether IP_MULTICAST_TTL
166			* takes a byte or an int as an argument.
167			* BSD seems to indicate byte so we are going with that and use
168			* int and fall back to byte to be safe */
169		✗	switch (addr->sa_family) {
170			#ifdef IP_MULTICAST_TTL
171		✗	case AF_INET:
172		✗	protocol = IPPROTO_IP;
173		✗	cmd = IP_MULTICAST_TTL;
174		✗	break;
175			#endif
176			#ifdef IPV6_MULTICAST_HOPS
177		✗	case AF_INET6:
178		✗	protocol = IPPROTO_IPV6;
179		✗	cmd = IPV6_MULTICAST_HOPS;
180		✗	break;
181			#endif
182		✗	default:
183		✗	return 0;
184			}
185
186		✗	if (setsockopt(sockfd, protocol, cmd, &mcastTTL, sizeof(mcastTTL)) < 0) {
187			/* BSD compatibility */
188		✗	unsigned char ttl = (unsigned char) mcastTTL;
189
190		✗	ff_log_net_error(logctx, AV_LOG_DEBUG, "setsockopt(IPV4/IPV6 MULTICAST TTL)");
191		✗	if (setsockopt(sockfd, protocol, cmd, &ttl, sizeof(ttl)) < 0) {
192		✗	ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IPV4/IPV6 MULTICAST TTL)");
193		✗	return ff_neterrno();
194			}
195			}
196
197		✗	return 0;
198			}
199
200		✗	static int udp_join_multicast_group(int sockfd, struct sockaddr *addr,
201			struct sockaddr *local_addr, void *logctx)
202			{
203			#ifdef IP_ADD_MEMBERSHIP
204		✗	if (addr->sa_family == AF_INET) {
205			struct ip_mreq mreq;
206
207		✗	mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
208		✗	if (local_addr)
209		✗	mreq.imr_interface= ((struct sockaddr_in *)local_addr)->sin_addr;
210			else
211		✗	mreq.imr_interface.s_addr = INADDR_ANY;
212		✗	if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
213		✗	ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP)");
214		✗	return ff_neterrno();
215			}
216			}
217			#endif
218			#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
219		✗	if (addr->sa_family == AF_INET6) {
220			struct ipv6_mreq mreq6;
221
222		✗	memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
223			//TODO: Interface index should be looked up from local_addr
224		✗	mreq6.ipv6mr_interface = 0;
225		✗	if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
226		✗	ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP)");
227		✗	return ff_neterrno();
228			}
229			}
230			#endif
231		✗	return 0;
232			}
233
234		✗	static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr,
235			struct sockaddr *local_addr, void *logctx)
236			{
237			#ifdef IP_DROP_MEMBERSHIP
238		✗	if (addr->sa_family == AF_INET) {
239			struct ip_mreq mreq;
240
241		✗	mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
242		✗	if (local_addr)
243		✗	mreq.imr_interface = ((struct sockaddr_in *)local_addr)->sin_addr;
244			else
245		✗	mreq.imr_interface.s_addr = INADDR_ANY;
246		✗	if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
247		✗	ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP)");
248		✗	return -1;
249			}
250			}
251			#endif
252			#if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
253		✗	if (addr->sa_family == AF_INET6) {
254			struct ipv6_mreq mreq6;
255
256		✗	memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
257			//TODO: Interface index should be looked up from local_addr
258		✗	mreq6.ipv6mr_interface = 0;
259		✗	if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
260		✗	ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP)");
261		✗	return -1;
262			}
263			}
264			#endif
265		✗	return 0;
266			}
267
268		✗	static int udp_set_multicast_sources(URLContext *h,
269			int sockfd, struct sockaddr *addr,
270			int addr_len, struct sockaddr_storage *local_addr,
271			struct sockaddr_storage *sources,
272			int nb_sources, int include)
273			{
274			int i;
275		✗	if (addr->sa_family != AF_INET) {
276			#if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE)
277			/* For IPv4 prefer the old approach, as that alone works reliably on
278			* Windows and it also supports supplying the interface based on its
279			* address. */
280			int i;
281		✗	for (i = 0; i < nb_sources; i++) {
282			struct group_source_req mreqs;
283		✗	int level = addr->sa_family == AF_INET ? IPPROTO_IP : IPPROTO_IPV6;
284
285			//TODO: Interface index should be looked up from local_addr
286		✗	mreqs.gsr_interface = 0;
287		✗	memcpy(&mreqs.gsr_group, addr, addr_len);
288		✗	memcpy(&mreqs.gsr_source, &sources[i], sizeof(*sources));
289
290		✗	if (setsockopt(sockfd, level,
291			include ? MCAST_JOIN_SOURCE_GROUP : MCAST_BLOCK_SOURCE,
292			(const void *)&mreqs, sizeof(mreqs)) < 0) {
293		✗	if (include)
294		✗	ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
295			else
296		✗	ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(MCAST_BLOCK_SOURCE)");
297		✗	return ff_neterrno();
298			}
299			}
300		✗	return 0;
301			#else
302			av_log(h, AV_LOG_ERROR,
303			"Setting multicast sources only supported for IPv4\n");
304			return AVERROR(EINVAL);
305			#endif
306			}
307			#if HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
308		✗	for (i = 0; i < nb_sources; i++) {
309			struct ip_mreq_source mreqs;
310		✗	if (sources[i].ss_family != AF_INET) {
311		✗	av_log(h, AV_LOG_ERROR, "Source/block address %d is of incorrect protocol family\n", i + 1);
312		✗	return AVERROR(EINVAL);
313			}
314
315		✗	mreqs.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
316		✗	if (local_addr)
317		✗	mreqs.imr_interface = ((struct sockaddr_in *)local_addr)->sin_addr;
318			else
319		✗	mreqs.imr_interface.s_addr = INADDR_ANY;
320		✗	mreqs.imr_sourceaddr.s_addr = ((struct sockaddr_in *)&sources[i])->sin_addr.s_addr;
321
322		✗	if (setsockopt(sockfd, IPPROTO_IP,
323			include ? IP_ADD_SOURCE_MEMBERSHIP : IP_BLOCK_SOURCE,
324			(const void *)&mreqs, sizeof(mreqs)) < 0) {
325		✗	if (include)
326		✗	ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
327			else
328		✗	ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(IP_BLOCK_SOURCE)");
329		✗	return ff_neterrno();
330			}
331			}
332			#else
333			return AVERROR(ENOSYS);
334			#endif
335		✗	return 0;
336			}
337		✗	static int udp_set_url(URLContext *h,
338			struct sockaddr_storage *addr,
339			const char *hostname, int port)
340			{
341			struct addrinfo *res0;
342			int addr_len;
343
344		✗	res0 = ff_ip_resolve_host(h, 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;
348		✗	freeaddrinfo(res0);
349
350		✗	return addr_len;
351			}
352
353		✗	static int udp_socket_create(URLContext *h, struct sockaddr_storage *addr,
354			socklen_t *addr_len, const char *localaddr)
355			{
356		✗	UDPContext *s = h->priv_data;
357		✗	int udp_fd = -1;
358			struct addrinfo *res0, *res;
359		✗	int family = AF_UNSPEC;
360
361		✗	if (((struct sockaddr *) &s->dest_addr)->sa_family)
362		✗	family = ((struct sockaddr *) &s->dest_addr)->sa_family;
363		✗	res0 = ff_ip_resolve_host(h, (localaddr && localaddr[0]) ? localaddr : NULL,
364			s->local_port,
365			SOCK_DGRAM, family, AI_PASSIVE);
366		✗	if (!res0)
367		✗	goto fail;
368		✗	for (res = res0; res; res=res->ai_next) {
369		✗	if (s->udplite_coverage)
370		✗	udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, IPPROTO_UDPLITE, h);
371			else
372		✗	udp_fd = ff_socket(res->ai_family, SOCK_DGRAM, 0, h);
373		✗	if (udp_fd != -1) break;
374		✗	ff_log_net_error(h, AV_LOG_ERROR, "socket");
375			}
376
377		✗	if (udp_fd < 0)
378		✗	goto fail;
379
380		✗	memcpy(addr, res->ai_addr, res->ai_addrlen);
381		✗	*addr_len = res->ai_addrlen;
382
383		✗	freeaddrinfo(res0);
384
385		✗	return udp_fd;
386
387		✗	fail:
388		✗	if (udp_fd >= 0)
389		✗	closesocket(udp_fd);
390		✗	if(res0)
391		✗	freeaddrinfo(res0);
392		✗	return -1;
393			}
394
395		✗	static int udp_port(struct sockaddr_storage *addr, int addr_len)
396			{
397			char sbuf[sizeof(int)*3+1];
398			int error;
399
400		✗	if ((error = getnameinfo((struct sockaddr *)addr, addr_len, NULL, 0, sbuf, sizeof(sbuf), NI_NUMERICSERV)) != 0) {
401		✗	av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(error));
402		✗	return -1;
403			}
404
405		✗	return strtol(sbuf, NULL, 10);
406			}
407
408
409			/**
410			* If no filename is given to av_open_input_file because you want to
411			* get the local port first, then you must call this function to set
412			* the remote server address.
413			*
414			* url syntax: udp://host:port[?option=val...]
415			* option: 'ttl=n' : set the ttl value (for multicast only)
416			* 'localport=n' : set the local port
417			* 'pkt_size=n' : set max packet size
418			* 'reuse=1' : enable reusing the socket
419			* 'overrun_nonfatal=1': survive in case of circular buffer overrun
420			*
421			* @param h media file context
422			* @param uri of the remote server
423			* @return zero if no error.
424			*/
425		✗	int ff_udp_set_remote_url(URLContext *h, const char *uri)
426			{
427		✗	UDPContext *s = h->priv_data;
428			char hostname[256], buf[10];
429			int port;
430			const char *p;
431
432		✗	av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
433
434			/* set the destination address */
435		✗	s->dest_addr_len = udp_set_url(h, &s->dest_addr, hostname, port);
436		✗	if (s->dest_addr_len < 0) {
437		✗	return AVERROR(EIO);
438			}
439		✗	s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr);
440		✗	p = strchr(uri, '?');
441		✗	if (p) {
442		✗	if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
443		✗	int was_connected = s->is_connected;
444		✗	s->is_connected = strtol(buf, NULL, 10);
445		✗	if (s->is_connected && !was_connected) {
446		✗	if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr,
447		✗	s->dest_addr_len)) {
448		✗	s->is_connected = 0;
449		✗	ff_log_net_error(h, AV_LOG_ERROR, "connect");
450		✗	return AVERROR(EIO);
451			}
452			}
453			}
454			}
455
456		✗	return 0;
457			}
458
459			/**
460			* Return the local port used by the UDP connection
461			* @param h media file context
462			* @return the local port number
463			*/
464		✗	int ff_udp_get_local_port(URLContext *h)
465			{
466		✗	UDPContext *s = h->priv_data;
467		✗	return s->local_port;
468			}
469
470			/**
471			* Return the udp file handle for select() usage to wait for several RTP
472			* streams at the same time.
473			* @param h media file context
474			*/
475		✗	static int udp_get_file_handle(URLContext *h)
476			{
477		✗	UDPContext *s = h->priv_data;
478		✗	return s->udp_fd;
479			}
480
481			#if HAVE_PTHREAD_CANCEL
482		✗	static void *circular_buffer_task_rx( void *_URLContext)
483			{
484		✗	URLContext *h = _URLContext;
485		✗	UDPContext *s = h->priv_data;
486			int old_cancelstate;
487
488		✗	ff_thread_setname("udp-rx");
489
490		✗	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
491		✗	pthread_mutex_lock(&s->mutex);
492		✗	if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
493		✗	av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
494		✗	s->circular_buffer_error = AVERROR(EIO);
495		✗	goto end;
496			}
497		✗	while(1) {
498			int len;
499			struct sockaddr_storage addr;
500		✗	socklen_t addr_len = sizeof(addr);
501
502		✗	pthread_mutex_unlock(&s->mutex);
503			/* Blocking operations are always cancellation points;
504			see "General Information" / "Thread Cancelation Overview"
505			in Single Unix. */
506		✗	pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_cancelstate);
507		✗	len = recvfrom(s->udp_fd, s->tmp+4, sizeof(s->tmp)-4, 0, (struct sockaddr *)&addr, &addr_len);
508		✗	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_cancelstate);
509		✗	pthread_mutex_lock(&s->mutex);
510		✗	if (len < 0) {
511		✗	if (ff_neterrno() != AVERROR(EAGAIN) && ff_neterrno() != AVERROR(EINTR)) {
512		✗	s->circular_buffer_error = ff_neterrno();
513		✗	goto end;
514			}
515		✗	continue;
516			}
517		✗	if (ff_ip_check_source_lists(&addr, &s->filters))
518		✗	continue;
519		✗	AV_WL32(s->tmp, len);
520
521		✗	if (av_fifo_can_write(s->fifo) < len + 4) {
522			/* No Space left */
523		✗	if (s->overrun_nonfatal) {
524		✗	av_log(h, AV_LOG_WARNING, "Circular buffer overrun. "
525			"Surviving due to overrun_nonfatal option\n");
526		✗	continue;
527			} else {
528		✗	av_log(h, AV_LOG_ERROR, "Circular buffer overrun. "
529			"To avoid, increase fifo_size URL option. "
530			"To survive in such case, use overrun_nonfatal option\n");
531		✗	s->circular_buffer_error = AVERROR(EIO);
532		✗	goto end;
533			}
534			}
535		✗	av_fifo_write(s->fifo, s->tmp, len + 4);
536		✗	pthread_cond_signal(&s->cond);
537			}
538
539		✗	end:
540		✗	pthread_cond_signal(&s->cond);
541		✗	pthread_mutex_unlock(&s->mutex);
542		✗	return NULL;
543			}
544
545		✗	static void *circular_buffer_task_tx( void *_URLContext)
546			{
547		✗	URLContext *h = _URLContext;
548		✗	UDPContext *s = h->priv_data;
549		✗	int64_t target_timestamp = av_gettime_relative();
550		✗	int64_t start_timestamp = av_gettime_relative();
551		✗	int64_t sent_bits = 0;
552		✗	int64_t burst_interval = s->bitrate ? (s->burst_bits * 1000000 / s->bitrate) : 0;
553		✗	int64_t max_delay = s->bitrate ? ((int64_t)h->max_packet_size * 8 * 1000000 / s->bitrate + 1) : 0;
554
555		✗	ff_thread_setname("udp-tx");
556
557		✗	pthread_mutex_lock(&s->mutex);
558
559		✗	if (ff_socket_nonblock(s->udp_fd, 0) < 0) {
560		✗	av_log(h, AV_LOG_ERROR, "Failed to set blocking mode");
561		✗	s->circular_buffer_error = AVERROR(EIO);
562		✗	goto end;
563			}
564
565		✗	for(;;) {
566			int len;
567			const uint8_t *p;
568			uint8_t tmp[4];
569			int64_t timestamp;
570
571		✗	len = av_fifo_can_read(s->fifo);
572
573		✗	while (len<4) {
574		✗	if (s->close_req)
575		✗	goto end;
576		✗	pthread_cond_wait(&s->cond, &s->mutex);
577		✗	len = av_fifo_can_read(s->fifo);
578			}
579
580		✗	av_fifo_read(s->fifo, tmp, 4);
581		✗	len = AV_RL32(tmp);
582
583		✗	av_assert0(len >= 0);
584		✗	av_assert0(len <= sizeof(s->tmp));
585
586		✗	av_fifo_read(s->fifo, s->tmp, len);
587
588		✗	pthread_mutex_unlock(&s->mutex);
589
590		✗	if (s->bitrate) {
591		✗	timestamp = av_gettime_relative();
592		✗	if (timestamp < target_timestamp) {
593		✗	int64_t delay = target_timestamp - timestamp;
594		✗	if (delay > max_delay) {
595		✗	delay = max_delay;
596		✗	start_timestamp = timestamp + delay;
597		✗	sent_bits = 0;
598			}
599		✗	av_usleep(delay);
600			} else {
601		✗	if (timestamp - burst_interval > target_timestamp) {
602		✗	start_timestamp = timestamp - burst_interval;
603		✗	sent_bits = 0;
604			}
605			}
606		✗	sent_bits += len * 8;
607		✗	target_timestamp = start_timestamp + sent_bits * 1000000 / s->bitrate;
608			}
609
610		✗	p = s->tmp;
611		✗	while (len) {
612			int ret;
613		✗	av_assert0(len > 0);
614		✗	if (!s->is_connected) {
615		✗	ret = sendto (s->udp_fd, p, len, 0,
616		✗	(struct sockaddr *) &s->dest_addr,
617		✗	s->dest_addr_len);
618			} else
619		✗	ret = send(s->udp_fd, p, len, 0);
620		✗	if (ret >= 0) {
621		✗	len -= ret;
622		✗	p += ret;
623			} else {
624		✗	ret = ff_neterrno();
625		✗	if (ret != AVERROR(EAGAIN) && ret != AVERROR(EINTR)) {
626		✗	pthread_mutex_lock(&s->mutex);
627		✗	s->circular_buffer_error = ret;
628		✗	pthread_mutex_unlock(&s->mutex);
629		✗	return NULL;
630			}
631			}
632			}
633
634		✗	pthread_mutex_lock(&s->mutex);
635			}
636
637		✗	end:
638		✗	pthread_mutex_unlock(&s->mutex);
639		✗	return NULL;
640			}
641
642
643			#endif
644
645			/* put it in UDP context */
646			/* return non zero if error */
647		✗	static int udp_open(URLContext *h, const char *uri, int flags)
648			{
649			char hostname[1024];
650		✗	int port, udp_fd = -1, tmp, bind_ret = -1, dscp = -1;
651		✗	UDPContext *s = h->priv_data;
652			int is_output;
653			const char *p;
654			char buf[256];
655			struct sockaddr_storage my_addr;
656			socklen_t len;
657			int ret;
658
659		✗	h->is_streamed = 1;
660
661		✗	is_output = !(flags & AVIO_FLAG_READ);
662		✗	if (s->buffer_size < 0)
663		✗	s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_RX_BUF_SIZE;
664
665		✗	if (s->sources) {
666		✗	if ((ret = ff_ip_parse_sources(h, s->sources, &s->filters)) < 0)
667		✗	goto fail;
668			}
669
670		✗	if (s->block) {
671		✗	if ((ret = ff_ip_parse_blocks(h, s->block, &s->filters)) < 0)
672		✗	goto fail;
673			}
674
675		✗	p = strchr(uri, '?');
676		✗	if (p) {
677		✗	if (av_find_info_tag(buf, sizeof(buf), "reuse", p)) {
678		✗	char *endptr = NULL;
679		✗	s->reuse_socket = strtol(buf, &endptr, 10);
680			/* assume if no digits were found it is a request to enable it */
681		✗	if (buf == endptr)
682		✗	s->reuse_socket = 1;
683			}
684		✗	if (av_find_info_tag(buf, sizeof(buf), "overrun_nonfatal", p)) {
685		✗	char *endptr = NULL;
686		✗	s->overrun_nonfatal = strtol(buf, &endptr, 10);
687			/* assume if no digits were found it is a request to enable it */
688		✗	if (buf == endptr)
689		✗	s->overrun_nonfatal = 1;
690			if (!HAVE_PTHREAD_CANCEL)
691			av_log(h, AV_LOG_WARNING,
692			"'overrun_nonfatal' option was set but it is not supported "
693			"on this build (pthread support is required)\n");
694			}
695		✗	if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
696		✗	s->ttl = strtol(buf, NULL, 10);
697		✗	if (s->ttl < 0 || s->ttl > 255) {
698		✗	av_log(h, AV_LOG_ERROR, "ttl(%d) should be in range [0,255]\n", s->ttl);
699		✗	ret = AVERROR(EINVAL);
700		✗	goto fail;
701			}
702			}
703		✗	if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
704		✗	s->udplite_coverage = strtol(buf, NULL, 10);
705			}
706		✗	if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
707		✗	s->local_port = strtol(buf, NULL, 10);
708			}
709		✗	if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
710		✗	s->pkt_size = strtol(buf, NULL, 10);
711			}
712		✗	if (av_find_info_tag(buf, sizeof(buf), "buffer_size", p)) {
713		✗	s->buffer_size = strtol(buf, NULL, 10);
714			}
715		✗	if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
716		✗	s->is_connected = strtol(buf, NULL, 10);
717			}
718		✗	if (av_find_info_tag(buf, sizeof(buf), "dscp", p)) {
719		✗	dscp = strtol(buf, NULL, 10);
720			}
721		✗	if (av_find_info_tag(buf, sizeof(buf), "fifo_size", p)) {
722		✗	s->circular_buffer_size = strtol(buf, NULL, 10);
723			if (!HAVE_PTHREAD_CANCEL)
724			av_log(h, AV_LOG_WARNING,
725			"'circular_buffer_size' option was set but it is not supported "
726			"on this build (pthread support is required)\n");
727			}
728		✗	if (av_find_info_tag(buf, sizeof(buf), "bitrate", p)) {
729		✗	s->bitrate = strtoll(buf, NULL, 10);
730			if (!HAVE_PTHREAD_CANCEL)
731			av_log(h, AV_LOG_WARNING,
732			"'bitrate' option was set but it is not supported "
733			"on this build (pthread support is required)\n");
734			}
735		✗	if (av_find_info_tag(buf, sizeof(buf), "burst_bits", p)) {
736		✗	s->burst_bits = strtoll(buf, NULL, 10);
737			}
738		✗	if (av_find_info_tag(buf, sizeof(buf), "localaddr", p)) {
739		✗	av_freep(&s->localaddr);
740		✗	s->localaddr = av_strdup(buf);
741		✗	if (!s->localaddr) {
742		✗	ret = AVERROR(ENOMEM);
743		✗	goto fail;
744			}
745			}
746		✗	if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
747		✗	if ((ret = ff_ip_parse_sources(h, buf, &s->filters)) < 0)
748		✗	goto fail;
749			}
750		✗	if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
751		✗	if ((ret = ff_ip_parse_blocks(h, buf, &s->filters)) < 0)
752		✗	goto fail;
753			}
754		✗	if (!is_output && av_find_info_tag(buf, sizeof(buf), "timeout", p))
755		✗	s->timeout = strtol(buf, NULL, 10);
756		✗	if (is_output && av_find_info_tag(buf, sizeof(buf), "broadcast", p))
757		✗	s->is_broadcast = strtol(buf, NULL, 10);
758			}
759			/* handling needed to support options picking from both AVOption and URL */
760		✗	s->circular_buffer_size *= 188;
761		✗	if (flags & AVIO_FLAG_WRITE) {
762		✗	h->max_packet_size = s->pkt_size;
763			} else {
764		✗	h->max_packet_size = UDP_MAX_PKT_SIZE;
765			}
766		✗	h->rw_timeout = s->timeout;
767
768			/* fill the dest addr */
769		✗	av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
770
771			/* XXX: fix av_url_split */
772		✗	if (hostname[0] == '\0' || hostname[0] == '?') {
773			/* only accepts null hostname if input */
774		✗	if (!(flags & AVIO_FLAG_READ)) {
775		✗	ret = AVERROR(EINVAL);
776		✗	goto fail;
777			}
778			} else {
779		✗	if ((ret = ff_udp_set_remote_url(h, uri)) < 0)
780		✗	goto fail;
781			}
782
783		✗	if ((s->is_multicast || s->local_port <= 0) && (h->flags & AVIO_FLAG_READ))
784		✗	s->local_port = port;
785
786		✗	udp_fd = udp_socket_create(h, &my_addr, &len, s->localaddr);
787		✗	if (udp_fd < 0) {
788		✗	ret = AVERROR(EIO);
789		✗	goto fail;
790			}
791
792		✗	s->local_addr_storage=my_addr; //store for future multicast join
793
794			/* Follow the requested reuse option, unless it's multicast in which
795			* case enable reuse unless explicitly disabled.
796			*/
797		✗	if (s->reuse_socket > 0 || (s->is_multicast && s->reuse_socket < 0)) {
798		✗	s->reuse_socket = 1;
799		✗	if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0) {
800		✗	ret = ff_neterrno();
801		✗	goto fail;
802			}
803			}
804
805		✗	if (s->is_broadcast) {
806			#ifdef SO_BROADCAST
807		✗	if (setsockopt (udp_fd, SOL_SOCKET, SO_BROADCAST, &(s->is_broadcast), sizeof(s->is_broadcast)) != 0) {
808		✗	ret = ff_neterrno();
809		✗	goto fail;
810			}
811			#else
812			ret = AVERROR(ENOSYS);
813			goto fail;
814			#endif
815			}
816
817			/* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
818			* The receiver coverage has to be less than or equal to the sender coverage.
819			* Otherwise, the receiver will drop all packets.
820			*/
821		✗	if (s->udplite_coverage) {
822		✗	if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
823		✗	av_log(h, AV_LOG_WARNING, "socket option UDPLITE_SEND_CSCOV not available");
824
825		✗	if (setsockopt (udp_fd, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV, &(s->udplite_coverage), sizeof(s->udplite_coverage)) != 0)
826		✗	av_log(h, AV_LOG_WARNING, "socket option UDPLITE_RECV_CSCOV not available");
827			}
828
829		✗	if (dscp >= 0) {
830		✗	dscp <<= 2;
831		✗	if (setsockopt (udp_fd, IPPROTO_IP, IP_TOS, &dscp, sizeof(dscp)) != 0) {
832		✗	ret = ff_neterrno();
833		✗	goto fail;
834			}
835			}
836
837			/* If multicast, try binding the multicast address first, to avoid
838			* receiving UDP packets from other sources aimed at the same UDP
839			* port. This fails on windows. This makes sending to the same address
840			* using sendto() fail, so only do it if we're opened in read-only mode. */
841		✗	if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) {
842		✗	bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
843			}
844			/* bind to the local address if not multicast or if the multicast
845			* bind failed */
846			/* the bind is needed to give a port to the socket now */
847		✗	if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) {
848		✗	ff_log_net_error(h, AV_LOG_ERROR, "bind failed");
849		✗	ret = ff_neterrno();
850		✗	goto fail;
851			}
852
853		✗	len = sizeof(my_addr);
854		✗	getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
855		✗	s->local_port = udp_port(&my_addr, len);
856
857		✗	if (s->is_multicast) {
858		✗	if (h->flags & AVIO_FLAG_WRITE) {
859			/* output */
860		✗	if ((ret = udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr, h)) < 0)
861		✗	goto fail;
862			}
863		✗	if (h->flags & AVIO_FLAG_READ) {
864			/* input */
865		✗	if (s->filters.nb_include_addrs) {
866		✗	if ((ret = udp_set_multicast_sources(h, udp_fd,
867		✗	(struct sockaddr *)&s->dest_addr,
868			s->dest_addr_len, &s->local_addr_storage,
869			s->filters.include_addrs,
870			s->filters.nb_include_addrs, 1)) < 0)
871		✗	goto fail;
872			} else {
873		✗	if ((ret = udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr,
874		✗	(struct sockaddr *)&s->local_addr_storage, h)) < 0)
875		✗	goto fail;
876			}
877		✗	if (s->filters.nb_exclude_addrs) {
878		✗	if ((ret = udp_set_multicast_sources(h, udp_fd,
879		✗	(struct sockaddr *)&s->dest_addr,
880			s->dest_addr_len, &s->local_addr_storage,
881			s->filters.exclude_addrs,
882			s->filters.nb_exclude_addrs, 0)) < 0)
883		✗	goto fail;
884			}
885			}
886			}
887
888		✗	if (is_output) {
889			/* limit the tx buf size to limit latency */
890		✗	tmp = s->buffer_size;
891		✗	if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
892		✗	ff_log_net_error(h, AV_LOG_ERROR, "setsockopt(SO_SNDBUF)");
893		✗	ret = ff_neterrno();
894		✗	goto fail;
895			}
896			} else {
897			/* set udp recv buffer size to the requested value (default UDP_RX_BUF_SIZE) */
898		✗	tmp = s->buffer_size;
899		✗	if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) {
900		✗	ff_log_net_error(h, AV_LOG_WARNING, "setsockopt(SO_RECVBUF)");
901			}
902		✗	len = sizeof(tmp);
903		✗	if (getsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, &len) < 0) {
904		✗	ff_log_net_error(h, AV_LOG_WARNING, "getsockopt(SO_RCVBUF)");
905			} else {
906		✗	av_log(h, AV_LOG_DEBUG, "end receive buffer size reported is %d\n", tmp);
907		✗	if(tmp < s->buffer_size)
908		✗	av_log(h, AV_LOG_WARNING, "attempted to set receive buffer to size %d but it only ended up set as %d\n", s->buffer_size, tmp);
909			}
910
911			/* make the socket non-blocking */
912		✗	ff_socket_nonblock(udp_fd, 1);
913			}
914		✗	if (s->is_connected) {
915		✗	if (connect(udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) {
916		✗	ff_log_net_error(h, AV_LOG_ERROR, "connect");
917		✗	ret = ff_neterrno();
918		✗	goto fail;
919			}
920			}
921
922		✗	s->udp_fd = udp_fd;
923
924			#if HAVE_PTHREAD_CANCEL
925			/*
926			Create thread in case of:
927			1. Input and circular_buffer_size is set
928			2. Output and bitrate and circular_buffer_size is set
929			*/
930
931		✗	if (is_output && s->bitrate && !s->circular_buffer_size) {
932			/* Warn user in case of 'circular_buffer_size' is not set */
933		✗	av_log(h, AV_LOG_WARNING,"'bitrate' option was set but 'circular_buffer_size' is not, but required\n");
934			}
935
936		✗	if ((!is_output && s->circular_buffer_size) || (is_output && s->bitrate && s->circular_buffer_size)) {
937			/* start the task going */
938		✗	s->fifo = av_fifo_alloc2(s->circular_buffer_size, 1, 0);
939		✗	if (!s->fifo) {
940		✗	ret = AVERROR(ENOMEM);
941		✗	goto fail;
942			}
943		✗	ret = pthread_mutex_init(&s->mutex, NULL);
944		✗	if (ret != 0) {
945		✗	av_log(h, AV_LOG_ERROR, "pthread_mutex_init failed : %s\n", strerror(ret));
946		✗	ret = AVERROR(ret);
947		✗	goto fail;
948			}
949		✗	ret = pthread_cond_init(&s->cond, NULL);
950		✗	if (ret != 0) {
951		✗	av_log(h, AV_LOG_ERROR, "pthread_cond_init failed : %s\n", strerror(ret));
952		✗	ret = AVERROR(ret);
953		✗	goto cond_fail;
954			}
955		✗	ret = pthread_create(&s->circular_buffer_thread, NULL, is_output?circular_buffer_task_tx:circular_buffer_task_rx, h);
956		✗	if (ret != 0) {
957		✗	av_log(h, AV_LOG_ERROR, "pthread_create failed : %s\n", strerror(ret));
958		✗	ret = AVERROR(ret);
959		✗	goto thread_fail;
960			}
961		✗	s->thread_started = 1;
962			}
963			#endif
964
965		✗	return 0;
966			#if HAVE_PTHREAD_CANCEL
967		✗	thread_fail:
968		✗	pthread_cond_destroy(&s->cond);
969		✗	cond_fail:
970		✗	pthread_mutex_destroy(&s->mutex);
971			#endif
972		✗	fail:
973		✗	if (udp_fd >= 0)
974		✗	closesocket(udp_fd);
975		✗	av_fifo_freep2(&s->fifo);
976		✗	ff_ip_reset_filters(&s->filters);
977		✗	return ret;
978			}
979
980		✗	static int udplite_open(URLContext *h, const char *uri, int flags)
981			{
982		✗	UDPContext *s = h->priv_data;
983
984			// set default checksum coverage
985		✗	s->udplite_coverage = UDP_HEADER_SIZE;
986
987		✗	return udp_open(h, uri, flags);
988			}
989
990		✗	static int udp_read(URLContext *h, uint8_t *buf, int size)
991			{
992		✗	UDPContext *s = h->priv_data;
993			int ret;
994			struct sockaddr_storage addr;
995		✗	socklen_t addr_len = sizeof(addr);
996			#if HAVE_PTHREAD_CANCEL
997		✗	int avail, nonblock = h->flags & AVIO_FLAG_NONBLOCK;
998
999		✗	if (s->fifo) {
1000		✗	pthread_mutex_lock(&s->mutex);
1001			do {
1002		✗	avail = av_fifo_can_read(s->fifo);
1003		✗	if (avail) { // >=size) {
1004			uint8_t tmp[4];
1005
1006		✗	av_fifo_read(s->fifo, tmp, 4);
1007		✗	avail = AV_RL32(tmp);
1008		✗	if(avail > size){
1009		✗	av_log(h, AV_LOG_WARNING, "Part of datagram lost due to insufficient buffer size\n");
1010		✗	avail = size;
1011			}
1012
1013		✗	av_fifo_read(s->fifo, buf, avail);
1014		✗	av_fifo_drain2(s->fifo, AV_RL32(tmp) - avail);
1015		✗	pthread_mutex_unlock(&s->mutex);
1016		✗	return avail;
1017		✗	} else if(s->circular_buffer_error){
1018		✗	int err = s->circular_buffer_error;
1019		✗	pthread_mutex_unlock(&s->mutex);
1020		✗	return err;
1021		✗	} else if(nonblock) {
1022		✗	pthread_mutex_unlock(&s->mutex);
1023		✗	return AVERROR(EAGAIN);
1024			} else {
1025			/* FIXME: using the monotonic clock would be better,
1026			but it does not exist on all supported platforms. */
1027		✗	int64_t t = av_gettime() + 100000;
1028		✗	struct timespec tv = { .tv_sec = t / 1000000,
1029		✗	.tv_nsec = (t % 1000000) * 1000 };
1030		✗	int err = pthread_cond_timedwait(&s->cond, &s->mutex, &tv);
1031		✗	if (err) {
1032		✗	pthread_mutex_unlock(&s->mutex);
1033		✗	return AVERROR(err == ETIMEDOUT ? EAGAIN : err);
1034			}
1035		✗	nonblock = 1;
1036			}
1037			} while(1);
1038			}
1039			#endif
1040
1041		✗	if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1042		✗	ret = ff_network_wait_fd(s->udp_fd, 0);
1043		✗	if (ret < 0)
1044		✗	return ret;
1045			}
1046		✗	ret = recvfrom(s->udp_fd, buf, size, 0, (struct sockaddr *)&addr, &addr_len);
1047		✗	if (ret < 0)
1048		✗	return ff_neterrno();
1049		✗	if (ff_ip_check_source_lists(&addr, &s->filters))
1050		✗	return AVERROR(EINTR);
1051		✗	return ret;
1052			}
1053
1054		✗	static int udp_write(URLContext *h, const uint8_t *buf, int size)
1055			{
1056		✗	UDPContext *s = h->priv_data;
1057			int ret;
1058
1059			#if HAVE_PTHREAD_CANCEL
1060		✗	if (s->fifo) {
1061			uint8_t tmp[4];
1062
1063		✗	pthread_mutex_lock(&s->mutex);
1064
1065			/*
1066			Return error if last tx failed.
1067			Here we can't know on which packet error was, but it needs to know that error exists.
1068			*/
1069		✗	if (s->circular_buffer_error<0) {
1070		✗	int err = s->circular_buffer_error;
1071		✗	pthread_mutex_unlock(&s->mutex);
1072		✗	return err;
1073			}
1074
1075		✗	if (av_fifo_can_write(s->fifo) < size + 4) {
1076			/* What about a partial packet tx ? */
1077		✗	pthread_mutex_unlock(&s->mutex);
1078		✗	return AVERROR(ENOMEM);
1079			}
1080		✗	AV_WL32(tmp, size);
1081		✗	av_fifo_write(s->fifo, tmp, 4); /* size of packet */
1082		✗	av_fifo_write(s->fifo, buf, size); /* the data */
1083		✗	pthread_cond_signal(&s->cond);
1084		✗	pthread_mutex_unlock(&s->mutex);
1085		✗	return size;
1086			}
1087			#endif
1088		✗	if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
1089		✗	ret = ff_network_wait_fd(s->udp_fd, 1);
1090		✗	if (ret < 0)
1091		✗	return ret;
1092			}
1093
1094		✗	if (!s->is_connected) {
1095		✗	ret = sendto (s->udp_fd, buf, size, 0,
1096		✗	(struct sockaddr *) &s->dest_addr,
1097		✗	s->dest_addr_len);
1098			} else
1099		✗	ret = send(s->udp_fd, buf, size, 0);
1100
1101		✗	return ret < 0 ? ff_neterrno() : ret;
1102			}
1103
1104		✗	static int udp_close(URLContext *h)
1105			{
1106		✗	UDPContext *s = h->priv_data;
1107
1108			#if HAVE_PTHREAD_CANCEL
1109			// Request close once writing is finished
1110		✗	if (s->thread_started && !(h->flags & AVIO_FLAG_READ)) {
1111		✗	pthread_mutex_lock(&s->mutex);
1112		✗	s->close_req = 1;
1113		✗	pthread_cond_signal(&s->cond);
1114		✗	pthread_mutex_unlock(&s->mutex);
1115			}
1116			#endif
1117
1118		✗	if (s->is_multicast && (h->flags & AVIO_FLAG_READ))
1119		✗	udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr,
1120		✗	(struct sockaddr *)&s->local_addr_storage, h);
1121			#if HAVE_PTHREAD_CANCEL
1122		✗	if (s->thread_started) {
1123			int ret;
1124			// Cancel only read, as write has been signaled as success to the user
1125		✗	if (h->flags & AVIO_FLAG_READ) {
1126			#ifdef _WIN32
1127			/* recvfrom() is not a cancellation point for win32, so we shutdown
1128			* the socket and abort pending IO, subsequent recvfrom() calls
1129			* will fail with WSAESHUTDOWN causing the thread to exit. */
1130			shutdown(s->udp_fd, SD_RECEIVE);
1131			CancelIoEx((HANDLE)(SOCKET)s->udp_fd, NULL);
1132			#else
1133		✗	pthread_cancel(s->circular_buffer_thread);
1134			#endif
1135			}
1136		✗	ret = pthread_join(s->circular_buffer_thread, NULL);
1137		✗	if (ret != 0)
1138		✗	av_log(h, AV_LOG_ERROR, "pthread_join(): %s\n", strerror(ret));
1139		✗	pthread_mutex_destroy(&s->mutex);
1140		✗	pthread_cond_destroy(&s->cond);
1141			}
1142			#endif
1143		✗	closesocket(s->udp_fd);
1144		✗	av_fifo_freep2(&s->fifo);
1145		✗	ff_ip_reset_filters(&s->filters);
1146		✗	return 0;
1147			}
1148
1149			const URLProtocol ff_udp_protocol = {
1150			.name = "udp",
1151			.url_open = udp_open,
1152			.url_read = udp_read,
1153			.url_write = udp_write,
1154			.url_close = udp_close,
1155			.url_get_file_handle = udp_get_file_handle,
1156			.priv_data_size = sizeof(UDPContext),
1157			.priv_data_class = &udp_class,
1158			.flags = URL_PROTOCOL_FLAG_NETWORK,
1159			};
1160
1161			const URLProtocol ff_udplite_protocol = {
1162			.name = "udplite",
1163			.url_open = udplite_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 = &udplite_context_class,
1170			.flags = URL_PROTOCOL_FLAG_NETWORK,
1171			};
1172