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
85 struct sockaddr_storage dest_addr
;
89 /* Circular Buffer variables for use in UDP receive code */
90 int circular_buffer_size
;
92 int circular_buffer_error
;
93 #if HAVE_PTHREAD_CANCEL
94 pthread_t circular_buffer_thread
;
95 pthread_mutex_t mutex
;
99 uint8_t tmp
[UDP_MAX_PKT_SIZE
+4];
104 struct sockaddr_storage local_addr_storage
;
107 #define OFFSET(x) offsetof(UDPContext, x)
108 #define D AV_OPT_FLAG_DECODING_PARAM
109 #define E AV_OPT_FLAG_ENCODING_PARAM
110 static const AVOption options
[] = {
111 {"buffer_size", "set packet buffer size in bytes", OFFSET(buffer_size
), AV_OPT_TYPE_INT
, {.i64
= 0}, 0, INT_MAX
, D
|E
},
112 {"localport", "set local port to bind to", OFFSET(local_port
), AV_OPT_TYPE_INT
, {.i64
= 0}, 0, INT_MAX
, D
|E
},
113 {"localaddr", "choose local IP address", OFFSET(local_addr
), AV_OPT_TYPE_STRING
, {.str
= ""}, 0, 0, D
|E
},
114 {"udplite_coverage", "choose UDPLite head size which should be validated by checksum", OFFSET(udplite_coverage
), AV_OPT_TYPE_INT
, {.i64
= 0}, 0, INT_MAX
, D
|E
},
115 {"pkt_size", "set size of UDP packets", OFFSET(packet_size
), AV_OPT_TYPE_INT
, {.i64
= 1472}, 0, INT_MAX
, D
|E
},
116 {"reuse", "explicitly allow or disallow reusing UDP sockets", OFFSET(reuse_socket
), AV_OPT_TYPE_INT
, {.i64
= 0}, 0, 1, D
|E
},
117 {"broadcast", "explicitly allow or disallow broadcast destination", OFFSET(is_broadcast
), AV_OPT_TYPE_INT
, {.i64
= 0}, 0, 1, E
},
118 {"ttl", "set the time to live value (for multicast only)", OFFSET(ttl
), AV_OPT_TYPE_INT
, {.i64
= 16}, 0, INT_MAX
, E
},
119 {"connect", "set if connect() should be called on socket", OFFSET(is_connected
), AV_OPT_TYPE_INT
, {.i64
= 0}, 0, 1, D
|E
},
120 /* TODO 'sources', 'block' option */
121 {"fifo_size", "set the UDP receiving circular buffer size, expressed as a number of packets with size of 188 bytes", OFFSET(circular_buffer_size
), AV_OPT_TYPE_INT
, {.i64
= 7*4096}, 0, INT_MAX
, D
},
122 {"overrun_nonfatal", "survive in case of UDP receiving circular buffer overrun", OFFSET(overrun_nonfatal
), AV_OPT_TYPE_INT
, {.i64
= 0}, 0, 1, D
},
123 {"timeout", "set raise error timeout (only in read mode)", OFFSET(timeout
), AV_OPT_TYPE_INT
, {.i64
= 0}, 0, INT_MAX
, D
},
127 static const AVClass udp_context_class
= {
129 .item_name
= av_default_item_name
,
131 .version
= LIBAVUTIL_VERSION_INT
,
134 static const AVClass udplite_context_class
= {
135 .class_name
= "udplite",
136 .item_name
= av_default_item_name
,
138 .version
= LIBAVUTIL_VERSION_INT
,
141 static void log_net_error(void *ctx
, int level
, const char* prefix
)
144 av_strerror(ff_neterrno(), errbuf
, sizeof(errbuf
));
145 av_log(ctx
, level
, "%s: %s\n", prefix
, errbuf
);
148 static int udp_set_multicast_ttl(int sockfd
, int mcastTTL
,
149 struct sockaddr
*addr
)
151 #ifdef IP_MULTICAST_TTL
152 if (addr
->sa_family
== AF_INET
) {
153 if (setsockopt(sockfd
, IPPROTO_IP
, IP_MULTICAST_TTL
, &mcastTTL
, sizeof(mcastTTL
)) < 0) {
154 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(IP_MULTICAST_TTL)");
159 #if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
160 if (addr
->sa_family
== AF_INET6
) {
161 if (setsockopt(sockfd
, IPPROTO_IPV6
, IPV6_MULTICAST_HOPS
, &mcastTTL
, sizeof(mcastTTL
)) < 0) {
162 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(IPV6_MULTICAST_HOPS)");
170 static int udp_join_multicast_group(int sockfd
, struct sockaddr
*addr
,struct sockaddr
*local_addr
)
172 #ifdef IP_ADD_MEMBERSHIP
173 if (addr
->sa_family
== AF_INET
) {
176 mreq
.imr_multiaddr
.s_addr
= ((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
;
178 mreq
.imr_interface
= ((struct sockaddr_in
*)local_addr
)->sin_addr
;
180 mreq
.imr_interface
.s_addr
= INADDR_ANY
;
181 if (setsockopt(sockfd
, IPPROTO_IP
, IP_ADD_MEMBERSHIP
, (const void *)&mreq
, sizeof(mreq
)) < 0) {
182 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(IP_ADD_MEMBERSHIP)");
187 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
188 if (addr
->sa_family
== AF_INET6
) {
189 struct ipv6_mreq mreq6
;
191 memcpy(&mreq6
.ipv6mr_multiaddr
, &(((struct sockaddr_in6
*)addr
)->sin6_addr
), sizeof(struct in6_addr
));
192 mreq6
.ipv6mr_interface
= 0;
193 if (setsockopt(sockfd
, IPPROTO_IPV6
, IPV6_ADD_MEMBERSHIP
, &mreq6
, sizeof(mreq6
)) < 0) {
194 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(IPV6_ADD_MEMBERSHIP)");
202 static int udp_leave_multicast_group(int sockfd
, struct sockaddr
*addr
,struct sockaddr
*local_addr
)
204 #ifdef IP_DROP_MEMBERSHIP
205 if (addr
->sa_family
== AF_INET
) {
208 mreq
.imr_multiaddr
.s_addr
= ((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
;
210 mreq
.imr_interface
= ((struct sockaddr_in
*)local_addr
)->sin_addr
;
212 mreq
.imr_interface
.s_addr
= INADDR_ANY
;
213 if (setsockopt(sockfd
, IPPROTO_IP
, IP_DROP_MEMBERSHIP
, (const void *)&mreq
, sizeof(mreq
)) < 0) {
214 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(IP_DROP_MEMBERSHIP)");
219 #if HAVE_STRUCT_IPV6_MREQ && defined(IPPROTO_IPV6)
220 if (addr
->sa_family
== AF_INET6
) {
221 struct ipv6_mreq mreq6
;
223 memcpy(&mreq6
.ipv6mr_multiaddr
, &(((struct sockaddr_in6
*)addr
)->sin6_addr
), sizeof(struct in6_addr
));
224 mreq6
.ipv6mr_interface
= 0;
225 if (setsockopt(sockfd
, IPPROTO_IPV6
, IPV6_DROP_MEMBERSHIP
, &mreq6
, sizeof(mreq6
)) < 0) {
226 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(IPV6_DROP_MEMBERSHIP)");
234 static struct addrinfo
* udp_resolve_host(const char *hostname
, int port
,
235 int type
, int family
, int flags
)
237 struct addrinfo hints
= { 0 }, *res
= 0;
240 const char *node
= 0, *service
= "0";
243 snprintf(sport
, sizeof(sport
), "%d", port
);
246 if ((hostname
) && (hostname
[0] != '\0') && (hostname
[0] != '?')) {
249 hints
.ai_socktype
= type
;
250 hints
.ai_family
= family
;
251 hints
.ai_flags
= flags
;
252 if ((error
= getaddrinfo(node
, service
, &hints
, &res
))) {
254 av_log(NULL
, AV_LOG_ERROR
, "udp_resolve_host: %s\n", gai_strerror(error
));
260 static int udp_set_multicast_sources(int sockfd
, struct sockaddr
*addr
,
261 int addr_len
, char **sources
,
262 int nb_sources
, int include
)
264 #if HAVE_STRUCT_GROUP_SOURCE_REQ && defined(MCAST_BLOCK_SOURCE) && !defined(_WIN32)
265 /* These ones are available in the microsoft SDK, but don't seem to work
266 * as on linux, so just prefer the v4-only approach there for now. */
268 for (i
= 0; i
< nb_sources
; i
++) {
269 struct group_source_req mreqs
;
270 int level
= addr
->sa_family
== AF_INET
? IPPROTO_IP
: IPPROTO_IPV6
;
271 struct addrinfo
*sourceaddr
= udp_resolve_host(sources
[i
], 0,
272 SOCK_DGRAM
, AF_UNSPEC
,
275 return AVERROR(ENOENT
);
277 mreqs
.gsr_interface
= 0;
278 memcpy(&mreqs
.gsr_group
, addr
, addr_len
);
279 memcpy(&mreqs
.gsr_source
, sourceaddr
->ai_addr
, sourceaddr
->ai_addrlen
);
280 freeaddrinfo(sourceaddr
);
282 if (setsockopt(sockfd
, level
,
283 include
? MCAST_JOIN_SOURCE_GROUP
: MCAST_BLOCK_SOURCE
,
284 (const void *)&mreqs
, sizeof(mreqs
)) < 0) {
286 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(MCAST_JOIN_SOURCE_GROUP)");
288 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(MCAST_BLOCK_SOURCE)");
289 return ff_neterrno();
292 #elif HAVE_STRUCT_IP_MREQ_SOURCE && defined(IP_BLOCK_SOURCE)
294 if (addr
->sa_family
!= AF_INET
) {
295 av_log(NULL
, AV_LOG_ERROR
,
296 "Setting multicast sources only supported for IPv4\n");
297 return AVERROR(EINVAL
);
299 for (i
= 0; i
< nb_sources
; i
++) {
300 struct ip_mreq_source mreqs
;
301 struct addrinfo
*sourceaddr
= udp_resolve_host(sources
[i
], 0,
302 SOCK_DGRAM
, AF_UNSPEC
,
305 return AVERROR(ENOENT
);
306 if (sourceaddr
->ai_addr
->sa_family
!= AF_INET
) {
307 freeaddrinfo(sourceaddr
);
308 av_log(NULL
, AV_LOG_ERROR
, "%s is of incorrect protocol family\n",
310 return AVERROR(EINVAL
);
313 mreqs
.imr_multiaddr
.s_addr
= ((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
;
314 mreqs
.imr_interface
.s_addr
= INADDR_ANY
;
315 mreqs
.imr_sourceaddr
.s_addr
= ((struct sockaddr_in
*)sourceaddr
->ai_addr
)->sin_addr
.s_addr
;
316 freeaddrinfo(sourceaddr
);
318 if (setsockopt(sockfd
, IPPROTO_IP
,
319 include
? IP_ADD_SOURCE_MEMBERSHIP
: IP_BLOCK_SOURCE
,
320 (const void *)&mreqs
, sizeof(mreqs
)) < 0) {
322 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(IP_ADD_SOURCE_MEMBERSHIP)");
324 log_net_error(NULL
, AV_LOG_ERROR
, "setsockopt(IP_BLOCK_SOURCE)");
325 return ff_neterrno();
329 return AVERROR(ENOSYS
);
333 static int udp_set_url(struct sockaddr_storage
*addr
,
334 const char *hostname
, int port
)
336 struct addrinfo
*res0
;
339 res0
= udp_resolve_host(hostname
, port
, SOCK_DGRAM
, AF_UNSPEC
, 0);
340 if (!res0
) return AVERROR(EIO
);
341 memcpy(addr
, res0
->ai_addr
, res0
->ai_addrlen
);
342 addr_len
= res0
->ai_addrlen
;
348 static int udp_socket_create(UDPContext
*s
, struct sockaddr_storage
*addr
,
349 socklen_t
*addr_len
, const char *localaddr
)
352 struct addrinfo
*res0
, *res
;
353 int family
= AF_UNSPEC
;
355 if (((struct sockaddr
*) &s
->dest_addr
)->sa_family
)
356 family
= ((struct sockaddr
*) &s
->dest_addr
)->sa_family
;
357 res0
= udp_resolve_host(localaddr
[0] ? localaddr
: NULL
, s
->local_port
,
358 SOCK_DGRAM
, family
, AI_PASSIVE
);
361 for (res
= res0
; res
; res
=res
->ai_next
) {
362 if (s
->udplite_coverage
)
363 udp_fd
= ff_socket(res
->ai_family
, SOCK_DGRAM
, IPPROTO_UDPLITE
);
365 udp_fd
= ff_socket(res
->ai_family
, SOCK_DGRAM
, 0);
366 if (udp_fd
!= -1) break;
367 log_net_error(NULL
, AV_LOG_ERROR
, "socket");
373 memcpy(addr
, res
->ai_addr
, res
->ai_addrlen
);
374 *addr_len
= res
->ai_addrlen
;
388 static int udp_port(struct sockaddr_storage
*addr
, int addr_len
)
390 char sbuf
[sizeof(int)*3+1];
393 if ((error
= getnameinfo((struct sockaddr
*)addr
, addr_len
, NULL
, 0, sbuf
, sizeof(sbuf
), NI_NUMERICSERV
)) != 0) {
394 av_log(NULL
, AV_LOG_ERROR
, "getnameinfo: %s\n", gai_strerror(error
));
398 return strtol(sbuf
, NULL
, 10);
403 * If no filename is given to av_open_input_file because you want to
404 * get the local port first, then you must call this function to set
405 * the remote server address.
407 * url syntax: udp://host:port[?option=val...]
408 * option: 'ttl=n' : set the ttl value (for multicast only)
409 * 'localport=n' : set the local port
410 * 'pkt_size=n' : set max packet size
411 * 'reuse=1' : enable reusing the socket
412 * 'overrun_nonfatal=1': survive in case of circular buffer overrun
414 * @param h media file context
415 * @param uri of the remote server
416 * @return zero if no error.
418 int ff_udp_set_remote_url(URLContext
*h
, const char *uri
)
420 UDPContext
*s
= h
->priv_data
;
421 char hostname
[256], buf
[10];
425 av_url_split(NULL
, 0, NULL
, 0, hostname
, sizeof(hostname
), &port
, NULL
, 0, uri
);
427 /* set the destination address */
428 s
->dest_addr_len
= udp_set_url(&s
->dest_addr
, hostname
, port
);
429 if (s
->dest_addr_len
< 0) {
432 s
->is_multicast
= ff_is_multicast_address((struct sockaddr
*) &s
->dest_addr
);
433 p
= strchr(uri
, '?');
435 if (av_find_info_tag(buf
, sizeof(buf
), "connect", p
)) {
436 int was_connected
= s
->is_connected
;
437 s
->is_connected
= strtol(buf
, NULL
, 10);
438 if (s
->is_connected
&& !was_connected
) {
439 if (connect(s
->udp_fd
, (struct sockaddr
*) &s
->dest_addr
,
442 log_net_error(h
, AV_LOG_ERROR
, "connect");
453 * Return the local port used by the UDP connection
454 * @param h media file context
455 * @return the local port number
457 int ff_udp_get_local_port(URLContext
*h
)
459 UDPContext
*s
= h
->priv_data
;
460 return s
->local_port
;
464 * Return the udp file handle for select() usage to wait for several RTP
465 * streams at the same time.
466 * @param h media file context
468 static int udp_get_file_handle(URLContext
*h
)
470 UDPContext
*s
= h
->priv_data
;
474 #if HAVE_PTHREAD_CANCEL
475 static void *circular_buffer_task( void *_URLContext
)
477 URLContext
*h
= _URLContext
;
478 UDPContext
*s
= h
->priv_data
;
481 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE
, &old_cancelstate
);
482 pthread_mutex_lock(&s
->mutex
);
483 if (ff_socket_nonblock(s
->udp_fd
, 0) < 0) {
484 av_log(h
, AV_LOG_ERROR
, "Failed to set blocking mode");
485 s
->circular_buffer_error
= AVERROR(EIO
);
491 pthread_mutex_unlock(&s
->mutex
);
492 /* Blocking operations are always cancellation points;
493 see "General Information" / "Thread Cancelation Overview"
495 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE
, &old_cancelstate
);
496 len
= recv(s
->udp_fd
, s
->tmp
+4, sizeof(s
->tmp
)-4, 0);
497 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE
, &old_cancelstate
);
498 pthread_mutex_lock(&s
->mutex
);
500 if (ff_neterrno() != AVERROR(EAGAIN
) && ff_neterrno() != AVERROR(EINTR
)) {
501 s
->circular_buffer_error
= ff_neterrno();
506 AV_WL32(s
->tmp
, len
);
508 if(av_fifo_space(s
->fifo
) < len
+ 4) {
510 if (s
->overrun_nonfatal
) {
511 av_log(h
, AV_LOG_WARNING
, "Circular buffer overrun. "
512 "Surviving due to overrun_nonfatal option\n");
515 av_log(h
, AV_LOG_ERROR
, "Circular buffer overrun. "
516 "To avoid, increase fifo_size URL option. "
517 "To survive in such case, use overrun_nonfatal option\n");
518 s
->circular_buffer_error
= AVERROR(EIO
);
522 av_fifo_generic_write(s
->fifo
, s
->tmp
, len
+4, NULL
);
523 pthread_cond_signal(&s
->cond
);
527 pthread_cond_signal(&s
->cond
);
528 pthread_mutex_unlock(&s
->mutex
);
533 static int parse_source_list(char *buf
, char **sources
, int *num_sources
,
540 char *next
= strchr(source_start
, ',');
543 sources
[*num_sources
] = av_strdup(source_start
);
544 if (!sources
[*num_sources
])
545 return AVERROR(ENOMEM
);
546 source_start
= next
+ 1;
548 if (*num_sources
>= max_sources
|| !next
)
554 /* put it in UDP context */
555 /* return non zero if error */
556 static int udp_open(URLContext
*h
, const char *uri
, int flags
)
558 char hostname
[1024], localaddr
[1024] = "";
559 int port
, udp_fd
= -1, tmp
, bind_ret
= -1, dscp
= -1;
560 UDPContext
*s
= h
->priv_data
;
564 struct sockaddr_storage my_addr
;
566 int reuse_specified
= 0;
567 int i
, num_include_sources
= 0, num_exclude_sources
= 0;
568 char *include_sources
[32], *exclude_sources
[32];
572 is_output
= !(flags
& AVIO_FLAG_READ
);
573 if (!s
->buffer_size
) /* if not set explicitly */
574 s
->buffer_size
= is_output
? UDP_TX_BUF_SIZE
: UDP_MAX_PKT_SIZE
;
576 p
= strchr(uri
, '?');
578 if (av_find_info_tag(buf
, sizeof(buf
), "reuse", p
)) {
580 s
->reuse_socket
= strtol(buf
, &endptr
, 10);
581 /* assume if no digits were found it is a request to enable it */
586 if (av_find_info_tag(buf
, sizeof(buf
), "overrun_nonfatal", p
)) {
588 s
->overrun_nonfatal
= strtol(buf
, &endptr
, 10);
589 /* assume if no digits were found it is a request to enable it */
591 s
->overrun_nonfatal
= 1;
592 if (!HAVE_PTHREAD_CANCEL
)
593 av_log(h
, AV_LOG_WARNING
,
594 "'overrun_nonfatal' option was set but it is not supported "
595 "on this build (pthread support is required)\n");
597 if (av_find_info_tag(buf
, sizeof(buf
), "ttl", p
)) {
598 s
->ttl
= strtol(buf
, NULL
, 10);
600 if (av_find_info_tag(buf
, sizeof(buf
), "udplite_coverage", p
)) {
601 s
->udplite_coverage
= strtol(buf
, NULL
, 10);
603 if (av_find_info_tag(buf
, sizeof(buf
), "localport", p
)) {
604 s
->local_port
= strtol(buf
, NULL
, 10);
606 if (av_find_info_tag(buf
, sizeof(buf
), "pkt_size", p
)) {
607 s
->packet_size
= strtol(buf
, NULL
, 10);
609 if (av_find_info_tag(buf
, sizeof(buf
), "buffer_size", p
)) {
610 s
->buffer_size
= strtol(buf
, NULL
, 10);
612 if (av_find_info_tag(buf
, sizeof(buf
), "connect", p
)) {
613 s
->is_connected
= strtol(buf
, NULL
, 10);
615 if (av_find_info_tag(buf
, sizeof(buf
), "dscp", p
)) {
616 dscp
= strtol(buf
, NULL
, 10);
618 if (av_find_info_tag(buf
, sizeof(buf
), "fifo_size", p
)) {
619 s
->circular_buffer_size
= strtol(buf
, NULL
, 10);
620 if (!HAVE_PTHREAD_CANCEL
)
621 av_log(h
, AV_LOG_WARNING
,
622 "'circular_buffer_size' option was set but it is not supported "
623 "on this build (pthread support is required)\n");
625 if (av_find_info_tag(buf
, sizeof(buf
), "localaddr", p
)) {
626 av_strlcpy(localaddr
, buf
, sizeof(localaddr
));
628 if (av_find_info_tag(buf
, sizeof(buf
), "sources", p
)) {
629 if (parse_source_list(buf
, include_sources
, &num_include_sources
,
630 FF_ARRAY_ELEMS(include_sources
)))
633 if (av_find_info_tag(buf
, sizeof(buf
), "block", p
)) {
634 if (parse_source_list(buf
, exclude_sources
, &num_exclude_sources
,
635 FF_ARRAY_ELEMS(exclude_sources
)))
638 if (!is_output
&& av_find_info_tag(buf
, sizeof(buf
), "timeout", p
))
639 s
->timeout
= strtol(buf
, NULL
, 10);
640 if (is_output
&& av_find_info_tag(buf
, sizeof(buf
), "broadcast", p
))
641 s
->is_broadcast
= strtol(buf
, NULL
, 10);
643 /* handling needed to support options picking from both AVOption and URL */
644 s
->circular_buffer_size
*= 188;
645 if (flags
& AVIO_FLAG_WRITE
) {
646 h
->max_packet_size
= s
->packet_size
;
648 h
->max_packet_size
= UDP_MAX_PKT_SIZE
;
650 h
->rw_timeout
= s
->timeout
;
652 /* fill the dest addr */
653 av_url_split(NULL
, 0, NULL
, 0, hostname
, sizeof(hostname
), &port
, NULL
, 0, uri
);
655 /* XXX: fix av_url_split */
656 if (hostname
[0] == '\0' || hostname
[0] == '?') {
657 /* only accepts null hostname if input */
658 if (!(flags
& AVIO_FLAG_READ
))
661 if (ff_udp_set_remote_url(h
, uri
) < 0)
665 if ((s
->is_multicast
|| !s
->local_port
) && (h
->flags
& AVIO_FLAG_READ
))
666 s
->local_port
= port
;
667 udp_fd
= udp_socket_create(s
, &my_addr
, &len
, localaddr
[0] ? localaddr
: s
->local_addr
);
671 s
->local_addr_storage
=my_addr
; //store for future multicast join
673 /* Follow the requested reuse option, unless it's multicast in which
674 * case enable reuse unless explicitly disabled.
676 if (s
->reuse_socket
|| (s
->is_multicast
&& !reuse_specified
)) {
678 if (setsockopt (udp_fd
, SOL_SOCKET
, SO_REUSEADDR
, &(s
->reuse_socket
), sizeof(s
->reuse_socket
)) != 0)
682 if (s
->is_broadcast
) {
684 if (setsockopt (udp_fd
, SOL_SOCKET
, SO_BROADCAST
, &(s
->is_broadcast
), sizeof(s
->is_broadcast
)) != 0)
689 /* Set the checksum coverage for UDP-Lite (RFC 3828) for sending and receiving.
690 * The receiver coverage has to be less than or equal to the sender coverage.
691 * Otherwise, the receiver will drop all packets.
693 if (s
->udplite_coverage
) {
694 if (setsockopt (udp_fd
, IPPROTO_UDPLITE
, UDPLITE_SEND_CSCOV
, &(s
->udplite_coverage
), sizeof(s
->udplite_coverage
)) != 0)
695 av_log(h
, AV_LOG_WARNING
, "socket option UDPLITE_SEND_CSCOV not available");
697 if (setsockopt (udp_fd
, IPPROTO_UDPLITE
, UDPLITE_RECV_CSCOV
, &(s
->udplite_coverage
), sizeof(s
->udplite_coverage
)) != 0)
698 av_log(h
, AV_LOG_WARNING
, "socket option UDPLITE_RECV_CSCOV not available");
703 if (setsockopt (udp_fd
, IPPROTO_IP
, IP_TOS
, &dscp
, sizeof(dscp
)) != 0)
707 /* If multicast, try binding the multicast address first, to avoid
708 * receiving UDP packets from other sources aimed at the same UDP
709 * port. This fails on windows. This makes sending to the same address
710 * using sendto() fail, so only do it if we're opened in read-only mode. */
711 if (s
->is_multicast
&& !(h
->flags
& AVIO_FLAG_WRITE
)) {
712 bind_ret
= bind(udp_fd
,(struct sockaddr
*)&s
->dest_addr
, len
);
714 /* bind to the local address if not multicast or if the multicast
716 /* the bind is needed to give a port to the socket now */
717 if (bind_ret
< 0 && bind(udp_fd
,(struct sockaddr
*)&my_addr
, len
) < 0) {
718 log_net_error(h
, AV_LOG_ERROR
, "bind failed");
722 len
= sizeof(my_addr
);
723 getsockname(udp_fd
, (struct sockaddr
*)&my_addr
, &len
);
724 s
->local_port
= udp_port(&my_addr
, len
);
726 if (s
->is_multicast
) {
727 if (h
->flags
& AVIO_FLAG_WRITE
) {
729 if (udp_set_multicast_ttl(udp_fd
, s
->ttl
, (struct sockaddr
*)&s
->dest_addr
) < 0)
732 if (h
->flags
& AVIO_FLAG_READ
) {
734 if (num_include_sources
&& num_exclude_sources
) {
735 av_log(h
, AV_LOG_ERROR
, "Simultaneously including and excluding multicast sources is not supported\n");
738 if (num_include_sources
) {
739 if (udp_set_multicast_sources(udp_fd
, (struct sockaddr
*)&s
->dest_addr
, s
->dest_addr_len
, include_sources
, num_include_sources
, 1) < 0)
742 if (udp_join_multicast_group(udp_fd
, (struct sockaddr
*)&s
->dest_addr
,(struct sockaddr
*)&s
->local_addr_storage
) < 0)
745 if (num_exclude_sources
) {
746 if (udp_set_multicast_sources(udp_fd
, (struct sockaddr
*)&s
->dest_addr
, s
->dest_addr_len
, exclude_sources
, num_exclude_sources
, 0) < 0)
753 /* limit the tx buf size to limit latency */
754 tmp
= s
->buffer_size
;
755 if (setsockopt(udp_fd
, SOL_SOCKET
, SO_SNDBUF
, &tmp
, sizeof(tmp
)) < 0) {
756 log_net_error(h
, AV_LOG_ERROR
, "setsockopt(SO_SNDBUF)");
760 /* set udp recv buffer size to the requested value (default 64K) */
761 tmp
= s
->buffer_size
;
762 if (setsockopt(udp_fd
, SOL_SOCKET
, SO_RCVBUF
, &tmp
, sizeof(tmp
)) < 0) {
763 log_net_error(h
, AV_LOG_WARNING
, "setsockopt(SO_RECVBUF)");
766 if (getsockopt(udp_fd
, SOL_SOCKET
, SO_RCVBUF
, &tmp
, &len
) < 0) {
767 log_net_error(h
, AV_LOG_WARNING
, "getsockopt(SO_RCVBUF)");
769 av_log(h
, AV_LOG_DEBUG
, "end receive buffer size reported is %d\n", tmp
);
770 if(tmp
< s
->buffer_size
)
771 av_log(h
, AV_LOG_WARNING
, "attempted to set receive buffer to size %d but it only ended up set as %d", s
->buffer_size
, tmp
);
774 /* make the socket non-blocking */
775 ff_socket_nonblock(udp_fd
, 1);
777 if (s
->is_connected
) {
778 if (connect(udp_fd
, (struct sockaddr
*) &s
->dest_addr
, s
->dest_addr_len
)) {
779 log_net_error(h
, AV_LOG_ERROR
, "connect");
784 for (i
= 0; i
< num_include_sources
; i
++)
785 av_freep(&include_sources
[i
]);
786 for (i
= 0; i
< num_exclude_sources
; i
++)
787 av_freep(&exclude_sources
[i
]);
791 #if HAVE_PTHREAD_CANCEL
792 if (!is_output
&& s
->circular_buffer_size
) {
795 /* start the task going */
796 s
->fifo
= av_fifo_alloc(s
->circular_buffer_size
);
797 ret
= pthread_mutex_init(&s
->mutex
, NULL
);
799 av_log(h
, AV_LOG_ERROR
, "pthread_mutex_init failed : %s\n", strerror(ret
));
802 ret
= pthread_cond_init(&s
->cond
, NULL
);
804 av_log(h
, AV_LOG_ERROR
, "pthread_cond_init failed : %s\n", strerror(ret
));
807 ret
= pthread_create(&s
->circular_buffer_thread
, NULL
, circular_buffer_task
, h
);
809 av_log(h
, AV_LOG_ERROR
, "pthread_create failed : %s\n", strerror(ret
));
812 s
->thread_started
= 1;
817 #if HAVE_PTHREAD_CANCEL
819 pthread_cond_destroy(&s
->cond
);
821 pthread_mutex_destroy(&s
->mutex
);
826 av_fifo_freep(&s
->fifo
);
827 for (i
= 0; i
< num_include_sources
; i
++)
828 av_freep(&include_sources
[i
]);
829 for (i
= 0; i
< num_exclude_sources
; i
++)
830 av_freep(&exclude_sources
[i
]);
834 static int udplite_open(URLContext
*h
, const char *uri
, int flags
)
836 UDPContext
*s
= h
->priv_data
;
838 // set default checksum coverage
839 s
->udplite_coverage
= UDP_HEADER_SIZE
;
841 return udp_open(h
, uri
, flags
);
844 static int udp_read(URLContext
*h
, uint8_t *buf
, int size
)
846 UDPContext
*s
= h
->priv_data
;
848 #if HAVE_PTHREAD_CANCEL
849 int avail
, nonblock
= h
->flags
& AVIO_FLAG_NONBLOCK
;
852 pthread_mutex_lock(&s
->mutex
);
854 avail
= av_fifo_size(s
->fifo
);
855 if (avail
) { // >=size) {
858 av_fifo_generic_read(s
->fifo
, tmp
, 4, NULL
);
861 av_log(h
, AV_LOG_WARNING
, "Part of datagram lost due to insufficient buffer size\n");
865 av_fifo_generic_read(s
->fifo
, buf
, avail
, NULL
);
866 av_fifo_drain(s
->fifo
, AV_RL32(tmp
) - avail
);
867 pthread_mutex_unlock(&s
->mutex
);
869 } else if(s
->circular_buffer_error
){
870 int err
= s
->circular_buffer_error
;
871 pthread_mutex_unlock(&s
->mutex
);
873 } else if(nonblock
) {
874 pthread_mutex_unlock(&s
->mutex
);
875 return AVERROR(EAGAIN
);
878 /* FIXME: using the monotonic clock would be better,
879 but it does not exist on all supported platforms. */
880 int64_t t
= av_gettime() + 100000;
881 struct timespec tv
= { .tv_sec
= t
/ 1000000,
882 .tv_nsec
= (t
% 1000000) * 1000 };
883 if (pthread_cond_timedwait(&s
->cond
, &s
->mutex
, &tv
) < 0) {
884 pthread_mutex_unlock(&s
->mutex
);
885 return AVERROR(errno
== ETIMEDOUT
? EAGAIN
: errno
);
893 if (!(h
->flags
& AVIO_FLAG_NONBLOCK
)) {
894 ret
= ff_network_wait_fd(s
->udp_fd
, 0);
898 ret
= recv(s
->udp_fd
, buf
, size
, 0);
900 return ret
< 0 ? ff_neterrno() : ret
;
903 static int udp_write(URLContext
*h
, const uint8_t *buf
, int size
)
905 UDPContext
*s
= h
->priv_data
;
908 if (!(h
->flags
& AVIO_FLAG_NONBLOCK
)) {
909 ret
= ff_network_wait_fd(s
->udp_fd
, 1);
914 if (!s
->is_connected
) {
915 ret
= sendto (s
->udp_fd
, buf
, size
, 0,
916 (struct sockaddr
*) &s
->dest_addr
,
919 ret
= send(s
->udp_fd
, buf
, size
, 0);
921 return ret
< 0 ? ff_neterrno() : ret
;
924 static int udp_close(URLContext
*h
)
926 UDPContext
*s
= h
->priv_data
;
928 if (s
->is_multicast
&& (h
->flags
& AVIO_FLAG_READ
))
929 udp_leave_multicast_group(s
->udp_fd
, (struct sockaddr
*)&s
->dest_addr
,(struct sockaddr
*)&s
->local_addr_storage
);
930 closesocket(s
->udp_fd
);
931 #if HAVE_PTHREAD_CANCEL
932 if (s
->thread_started
) {
934 pthread_cancel(s
->circular_buffer_thread
);
935 ret
= pthread_join(s
->circular_buffer_thread
, NULL
);
937 av_log(h
, AV_LOG_ERROR
, "pthread_join(): %s\n", strerror(ret
));
938 pthread_mutex_destroy(&s
->mutex
);
939 pthread_cond_destroy(&s
->cond
);
942 av_fifo_freep(&s
->fifo
);
946 URLProtocol ff_udp_protocol
= {
948 .url_open
= udp_open
,
949 .url_read
= udp_read
,
950 .url_write
= udp_write
,
951 .url_close
= udp_close
,
952 .url_get_file_handle
= udp_get_file_handle
,
953 .priv_data_size
= sizeof(UDPContext
),
954 .priv_data_class
= &udp_context_class
,
955 .flags
= URL_PROTOCOL_FLAG_NETWORK
,
958 URLProtocol ff_udplite_protocol
= {
960 .url_open
= udplite_open
,
961 .url_read
= udp_read
,
962 .url_write
= udp_write
,
963 .url_close
= udp_close
,
964 .url_get_file_handle
= udp_get_file_handle
,
965 .priv_data_size
= sizeof(UDPContext
),
966 .priv_data_class
= &udplite_context_class
,
967 .flags
= URL_PROTOCOL_FLAG_NETWORK
,