3 * Copyright (c) 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
22 #include "libavutil/base64.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/parseutils.h"
27 #include "libavutil/random_seed.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/opt.h"
31 #include "avio_internal.h"
38 #include "os_support.h"
44 #include "rtpdec_formats.h"
45 #include "rtpenc_chain.h"
51 /* Timeout values for socket poll, in ms,
52 * and read_packet(), in seconds */
53 #define POLL_TIMEOUT_MS 100
54 #define READ_PACKET_TIMEOUT_S 10
55 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
56 #define SDP_MAX_SIZE 16384
57 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
58 #define DEFAULT_REORDERING_DELAY 100000
60 #define OFFSET(x) offsetof(RTSPState, x)
61 #define DEC AV_OPT_FLAG_DECODING_PARAM
62 #define ENC AV_OPT_FLAG_ENCODING_PARAM
64 #define RTSP_FLAG_OPTS(name, longname) \
65 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
66 { "filter_src", "Only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
68 #define RTSP_MEDIATYPE_OPTS(name, longname) \
69 { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { (1 << (AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
70 { "video", "Video", 0, AV_OPT_TYPE_CONST, {1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
71 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
72 { "data", "Data", 0, AV_OPT_TYPE_CONST, {1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }
74 const AVOption ff_rtsp_options[] = {
75 { "initial_pause", "Don't start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {0}, 0, 1, DEC },
76 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags)
77 { "rtsp_transport", "RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
78 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
79 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
80 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
81 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {(1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
82 RTSP_FLAG_OPTS("rtsp_flags", "RTSP flags"),
83 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
84 { "min_port", "Minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
85 { "max_port", "Maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
89 static const AVOption sdp_options[] = {
90 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
91 RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
95 static const AVOption rtp_options[] = {
96 RTSP_FLAG_OPTS("rtp_flags", "RTP flags"),
100 static void get_word_until_chars(char *buf, int buf_size,
101 const char *sep, const char **pp)
107 p += strspn(p, SPACE_CHARS);
109 while (!strchr(sep, *p) && *p != '\0') {
110 if ((q - buf) < buf_size - 1)
119 static void get_word_sep(char *buf, int buf_size, const char *sep,
122 if (**pp == '/') (*pp)++;
123 get_word_until_chars(buf, buf_size, sep, pp);
126 static void get_word(char *buf, int buf_size, const char **pp)
128 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
131 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
133 * Used for seeking in the rtp stream.
135 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
139 p += strspn(p, SPACE_CHARS);
140 if (!av_stristart(p, "npt=", &p))
143 *start = AV_NOPTS_VALUE;
144 *end = AV_NOPTS_VALUE;
146 get_word_sep(buf, sizeof(buf), "-", &p);
147 av_parse_time(start, buf, 1);
150 get_word_sep(buf, sizeof(buf), "-", &p);
151 av_parse_time(end, buf, 1);
153 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
154 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
157 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
159 struct addrinfo hints = { 0 }, *ai = NULL;
160 hints.ai_flags = AI_NUMERICHOST;
161 if (getaddrinfo(buf, NULL, &hints, &ai))
163 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
169 static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
170 RTSPStream *rtsp_st, AVCodecContext *codec)
174 codec->codec_id = handler->codec_id;
175 rtsp_st->dynamic_handler = handler;
176 if (handler->alloc) {
177 rtsp_st->dynamic_protocol_context = handler->alloc();
178 if (!rtsp_st->dynamic_protocol_context)
179 rtsp_st->dynamic_handler = NULL;
183 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
184 static int sdp_parse_rtpmap(AVFormatContext *s,
185 AVStream *st, RTSPStream *rtsp_st,
186 int payload_type, const char *p)
188 AVCodecContext *codec = st->codec;
194 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
195 * see if we can handle this kind of payload.
196 * The space should normally not be there but some Real streams or
197 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
198 * have a trailing space. */
199 get_word_sep(buf, sizeof(buf), "/ ", &p);
200 if (payload_type < RTP_PT_PRIVATE) {
201 /* We are in a standard case
202 * (from http://www.iana.org/assignments/rtp-parameters). */
203 /* search into AVRtpPayloadTypes[] */
204 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
207 if (codec->codec_id == CODEC_ID_NONE) {
208 RTPDynamicProtocolHandler *handler =
209 ff_rtp_handler_find_by_name(buf, codec->codec_type);
210 init_rtp_handler(handler, rtsp_st, codec);
211 /* If no dynamic handler was found, check with the list of standard
212 * allocated types, if such a stream for some reason happens to
213 * use a private payload type. This isn't handled in rtpdec.c, since
214 * the format name from the rtpmap line never is passed into rtpdec. */
215 if (!rtsp_st->dynamic_handler)
216 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
219 c = avcodec_find_decoder(codec->codec_id);
225 get_word_sep(buf, sizeof(buf), "/", &p);
227 switch (codec->codec_type) {
228 case AVMEDIA_TYPE_AUDIO:
229 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
230 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
231 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
233 codec->sample_rate = i;
234 avpriv_set_pts_info(st, 32, 1, codec->sample_rate);
235 get_word_sep(buf, sizeof(buf), "/", &p);
239 // TODO: there is a bug here; if it is a mono stream, and
240 // less than 22000Hz, faad upconverts to stereo and twice
241 // the frequency. No problem, but the sample rate is being
242 // set here by the sdp line. Patch on its way. (rdm)
244 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
246 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
249 case AVMEDIA_TYPE_VIDEO:
250 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
252 avpriv_set_pts_info(st, 32, 1, i);
257 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init)
258 rtsp_st->dynamic_handler->init(s, st->index,
259 rtsp_st->dynamic_protocol_context);
263 /* parse the attribute line from the fmtp a line of an sdp response. This
264 * is broken out as a function because it is used in rtp_h264.c, which is
266 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
267 char *value, int value_size)
269 *p += strspn(*p, SPACE_CHARS);
271 get_word_sep(attr, attr_size, "=", p);
274 get_word_sep(value, value_size, ";", p);
282 typedef struct SDPParseState {
284 struct sockaddr_storage default_ip;
286 int skip_media; ///< set if an unknown m= line occurs
289 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
290 int letter, const char *buf)
292 RTSPState *rt = s->priv_data;
293 char buf1[64], st_type[64];
295 enum AVMediaType codec_type;
299 struct sockaddr_storage sdp_ip;
302 av_dlog(s, "sdp: %c='%s'\n", letter, buf);
305 if (s1->skip_media && letter != 'm')
309 get_word(buf1, sizeof(buf1), &p);
310 if (strcmp(buf1, "IN") != 0)
312 get_word(buf1, sizeof(buf1), &p);
313 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
315 get_word_sep(buf1, sizeof(buf1), "/", &p);
316 if (get_sockaddr(buf1, &sdp_ip))
321 get_word_sep(buf1, sizeof(buf1), "/", &p);
324 if (s->nb_streams == 0) {
325 s1->default_ip = sdp_ip;
326 s1->default_ttl = ttl;
328 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
329 rtsp_st->sdp_ip = sdp_ip;
330 rtsp_st->sdp_ttl = ttl;
334 av_dict_set(&s->metadata, "title", p, 0);
337 if (s->nb_streams == 0) {
338 av_dict_set(&s->metadata, "comment", p, 0);
345 codec_type = AVMEDIA_TYPE_UNKNOWN;
346 get_word(st_type, sizeof(st_type), &p);
347 if (!strcmp(st_type, "audio")) {
348 codec_type = AVMEDIA_TYPE_AUDIO;
349 } else if (!strcmp(st_type, "video")) {
350 codec_type = AVMEDIA_TYPE_VIDEO;
351 } else if (!strcmp(st_type, "application")) {
352 codec_type = AVMEDIA_TYPE_DATA;
354 if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
358 rtsp_st = av_mallocz(sizeof(RTSPStream));
361 rtsp_st->stream_index = -1;
362 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
364 rtsp_st->sdp_ip = s1->default_ip;
365 rtsp_st->sdp_ttl = s1->default_ttl;
367 get_word(buf1, sizeof(buf1), &p); /* port */
368 rtsp_st->sdp_port = atoi(buf1);
370 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
372 /* XXX: handle list of formats */
373 get_word(buf1, sizeof(buf1), &p); /* format list */
374 rtsp_st->sdp_payload_type = atoi(buf1);
376 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
377 /* no corresponding stream */
378 } else if (rt->server_type == RTSP_SERVER_WMS &&
379 codec_type == AVMEDIA_TYPE_DATA) {
380 /* RTX stream, a stream that carries all the other actual
381 * audio/video streams. Don't expose this to the callers. */
383 st = avformat_new_stream(s, NULL);
386 st->id = rt->nb_rtsp_streams - 1;
387 rtsp_st->stream_index = st->index;
388 st->codec->codec_type = codec_type;
389 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
390 RTPDynamicProtocolHandler *handler;
391 /* if standard payload type, we can find the codec right now */
392 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
393 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
394 st->codec->sample_rate > 0)
395 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
396 /* Even static payload types may need a custom depacketizer */
397 handler = ff_rtp_handler_find_by_id(
398 rtsp_st->sdp_payload_type, st->codec->codec_type);
399 init_rtp_handler(handler, rtsp_st, st->codec);
400 if (handler && handler->init)
401 handler->init(s, st->index,
402 rtsp_st->dynamic_protocol_context);
405 /* put a default control url */
406 av_strlcpy(rtsp_st->control_url, rt->control_uri,
407 sizeof(rtsp_st->control_url));
410 if (av_strstart(p, "control:", &p)) {
411 if (s->nb_streams == 0) {
412 if (!strncmp(p, "rtsp://", 7))
413 av_strlcpy(rt->control_uri, p,
414 sizeof(rt->control_uri));
417 /* get the control url */
418 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
420 /* XXX: may need to add full url resolution */
421 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
423 if (proto[0] == '\0') {
424 /* relative control URL */
425 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
426 av_strlcat(rtsp_st->control_url, "/",
427 sizeof(rtsp_st->control_url));
428 av_strlcat(rtsp_st->control_url, p,
429 sizeof(rtsp_st->control_url));
431 av_strlcpy(rtsp_st->control_url, p,
432 sizeof(rtsp_st->control_url));
434 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
435 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
436 get_word(buf1, sizeof(buf1), &p);
437 payload_type = atoi(buf1);
438 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
439 if (rtsp_st->stream_index >= 0) {
440 st = s->streams[rtsp_st->stream_index];
441 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
443 } else if (av_strstart(p, "fmtp:", &p) ||
444 av_strstart(p, "framesize:", &p)) {
445 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
446 // let dynamic protocol handlers have a stab at the line.
447 get_word(buf1, sizeof(buf1), &p);
448 payload_type = atoi(buf1);
449 for (i = 0; i < rt->nb_rtsp_streams; i++) {
450 rtsp_st = rt->rtsp_streams[i];
451 if (rtsp_st->sdp_payload_type == payload_type &&
452 rtsp_st->dynamic_handler &&
453 rtsp_st->dynamic_handler->parse_sdp_a_line)
454 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
455 rtsp_st->dynamic_protocol_context, buf);
457 } else if (av_strstart(p, "range:", &p)) {
460 // this is so that seeking on a streamed file can work.
461 rtsp_parse_range_npt(p, &start, &end);
462 s->start_time = start;
463 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
464 s->duration = (end == AV_NOPTS_VALUE) ?
465 AV_NOPTS_VALUE : end - start;
466 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
468 rt->transport = RTSP_TRANSPORT_RDT;
469 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
471 st = s->streams[s->nb_streams - 1];
472 st->codec->sample_rate = atoi(p);
474 if (rt->server_type == RTSP_SERVER_WMS)
475 ff_wms_parse_sdp_a_line(s, p);
476 if (s->nb_streams > 0) {
477 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
479 if (rt->server_type == RTSP_SERVER_REAL)
480 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
482 if (rtsp_st->dynamic_handler &&
483 rtsp_st->dynamic_handler->parse_sdp_a_line)
484 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
485 rtsp_st->stream_index,
486 rtsp_st->dynamic_protocol_context, buf);
493 int ff_sdp_parse(AVFormatContext *s, const char *content)
495 RTSPState *rt = s->priv_data;
498 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
499 * contain long SDP lines containing complete ASF Headers (several
500 * kB) or arrays of MDPR (RM stream descriptor) headers plus
501 * "rulebooks" describing their properties. Therefore, the SDP line
504 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
505 * in rtpdec_xiph.c. */
507 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
511 p += strspn(p, SPACE_CHARS);
519 /* get the content */
521 while (*p != '\n' && *p != '\r' && *p != '\0') {
522 if ((q - buf) < sizeof(buf) - 1)
527 sdp_parse_line(s, s1, letter, buf);
529 while (*p != '\n' && *p != '\0')
534 rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
535 if (!rt->p) return AVERROR(ENOMEM);
538 #endif /* CONFIG_RTPDEC */
540 void ff_rtsp_undo_setup(AVFormatContext *s)
542 RTSPState *rt = s->priv_data;
545 for (i = 0; i < rt->nb_rtsp_streams; i++) {
546 RTSPStream *rtsp_st = rt->rtsp_streams[i];
549 if (rtsp_st->transport_priv) {
551 AVFormatContext *rtpctx = rtsp_st->transport_priv;
552 av_write_trailer(rtpctx);
553 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
555 avio_close_dyn_buf(rtpctx->pb, &ptr);
558 avio_close(rtpctx->pb);
560 avformat_free_context(rtpctx);
561 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
562 ff_rdt_parse_close(rtsp_st->transport_priv);
563 else if (CONFIG_RTPDEC)
564 ff_rtp_parse_close(rtsp_st->transport_priv);
566 rtsp_st->transport_priv = NULL;
567 if (rtsp_st->rtp_handle)
568 ffurl_close(rtsp_st->rtp_handle);
569 rtsp_st->rtp_handle = NULL;
573 /* close and free RTSP streams */
574 void ff_rtsp_close_streams(AVFormatContext *s)
576 RTSPState *rt = s->priv_data;
580 ff_rtsp_undo_setup(s);
581 for (i = 0; i < rt->nb_rtsp_streams; i++) {
582 rtsp_st = rt->rtsp_streams[i];
584 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
585 rtsp_st->dynamic_handler->free(
586 rtsp_st->dynamic_protocol_context);
590 av_free(rt->rtsp_streams);
592 avformat_close_input(&rt->asf_ctx);
595 av_free(rt->recvbuf);
598 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
600 RTSPState *rt = s->priv_data;
603 /* open the RTP context */
604 if (rtsp_st->stream_index >= 0)
605 st = s->streams[rtsp_st->stream_index];
607 s->ctx_flags |= AVFMTCTX_NOHEADER;
609 if (s->oformat && CONFIG_RTSP_MUXER) {
610 int ret = ff_rtp_chain_mux_open(&rtsp_st->transport_priv, s, st,
612 RTSP_TCP_MAX_PACKET_SIZE);
613 /* Ownership of rtp_handle is passed to the rtp mux context */
614 rtsp_st->rtp_handle = NULL;
617 } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
618 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
619 rtsp_st->dynamic_protocol_context,
620 rtsp_st->dynamic_handler);
621 else if (CONFIG_RTPDEC)
622 rtsp_st->transport_priv = ff_rtp_parse_open(s, st, rtsp_st->rtp_handle,
623 rtsp_st->sdp_payload_type,
624 (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
625 ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
627 if (!rtsp_st->transport_priv) {
628 return AVERROR(ENOMEM);
629 } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
630 if (rtsp_st->dynamic_handler) {
631 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
632 rtsp_st->dynamic_protocol_context,
633 rtsp_st->dynamic_handler);
640 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
641 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
648 q += strspn(q, SPACE_CHARS);
649 v = strtol(q, &p, 10);
653 v = strtol(p, &p, 10);
662 /* XXX: only one transport specification is parsed */
663 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
665 char transport_protocol[16];
667 char lower_transport[16];
669 RTSPTransportField *th;
672 reply->nb_transports = 0;
675 p += strspn(p, SPACE_CHARS);
679 th = &reply->transports[reply->nb_transports];
681 get_word_sep(transport_protocol, sizeof(transport_protocol),
683 if (!av_strcasecmp (transport_protocol, "rtp")) {
684 get_word_sep(profile, sizeof(profile), "/;,", &p);
685 lower_transport[0] = '\0';
686 /* rtp/avp/<protocol> */
688 get_word_sep(lower_transport, sizeof(lower_transport),
691 th->transport = RTSP_TRANSPORT_RTP;
692 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
693 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
694 /* x-pn-tng/<protocol> */
695 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
697 th->transport = RTSP_TRANSPORT_RDT;
699 if (!av_strcasecmp(lower_transport, "TCP"))
700 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
702 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
706 /* get each parameter */
707 while (*p != '\0' && *p != ',') {
708 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
709 if (!strcmp(parameter, "port")) {
712 rtsp_parse_range(&th->port_min, &th->port_max, &p);
714 } else if (!strcmp(parameter, "client_port")) {
717 rtsp_parse_range(&th->client_port_min,
718 &th->client_port_max, &p);
720 } else if (!strcmp(parameter, "server_port")) {
723 rtsp_parse_range(&th->server_port_min,
724 &th->server_port_max, &p);
726 } else if (!strcmp(parameter, "interleaved")) {
729 rtsp_parse_range(&th->interleaved_min,
730 &th->interleaved_max, &p);
732 } else if (!strcmp(parameter, "multicast")) {
733 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
734 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
735 } else if (!strcmp(parameter, "ttl")) {
738 th->ttl = strtol(p, (char **)&p, 10);
740 } else if (!strcmp(parameter, "destination")) {
743 get_word_sep(buf, sizeof(buf), ";,", &p);
744 get_sockaddr(buf, &th->destination);
746 } else if (!strcmp(parameter, "source")) {
749 get_word_sep(buf, sizeof(buf), ";,", &p);
750 av_strlcpy(th->source, buf, sizeof(th->source));
754 while (*p != ';' && *p != '\0' && *p != ',')
762 reply->nb_transports++;
766 static void handle_rtp_info(RTSPState *rt, const char *url,
767 uint32_t seq, uint32_t rtptime)
770 if (!rtptime || !url[0])
772 if (rt->transport != RTSP_TRANSPORT_RTP)
774 for (i = 0; i < rt->nb_rtsp_streams; i++) {
775 RTSPStream *rtsp_st = rt->rtsp_streams[i];
776 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
779 if (!strcmp(rtsp_st->control_url, url)) {
780 rtpctx->base_timestamp = rtptime;
786 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
789 char key[20], value[1024], url[1024] = "";
790 uint32_t seq = 0, rtptime = 0;
793 p += strspn(p, SPACE_CHARS);
796 get_word_sep(key, sizeof(key), "=", &p);
800 get_word_sep(value, sizeof(value), ";, ", &p);
802 if (!strcmp(key, "url"))
803 av_strlcpy(url, value, sizeof(url));
804 else if (!strcmp(key, "seq"))
805 seq = strtoul(value, NULL, 10);
806 else if (!strcmp(key, "rtptime"))
807 rtptime = strtoul(value, NULL, 10);
809 handle_rtp_info(rt, url, seq, rtptime);
818 handle_rtp_info(rt, url, seq, rtptime);
821 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
822 RTSPState *rt, const char *method)
826 /* NOTE: we do case independent match for broken servers */
828 if (av_stristart(p, "Session:", &p)) {
830 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
831 if (av_stristart(p, ";timeout=", &p) &&
832 (t = strtol(p, NULL, 10)) > 0) {
835 } else if (av_stristart(p, "Content-Length:", &p)) {
836 reply->content_length = strtol(p, NULL, 10);
837 } else if (av_stristart(p, "Transport:", &p)) {
838 rtsp_parse_transport(reply, p);
839 } else if (av_stristart(p, "CSeq:", &p)) {
840 reply->seq = strtol(p, NULL, 10);
841 } else if (av_stristart(p, "Range:", &p)) {
842 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
843 } else if (av_stristart(p, "RealChallenge1:", &p)) {
844 p += strspn(p, SPACE_CHARS);
845 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
846 } else if (av_stristart(p, "Server:", &p)) {
847 p += strspn(p, SPACE_CHARS);
848 av_strlcpy(reply->server, p, sizeof(reply->server));
849 } else if (av_stristart(p, "Notice:", &p) ||
850 av_stristart(p, "X-Notice:", &p)) {
851 reply->notice = strtol(p, NULL, 10);
852 } else if (av_stristart(p, "Location:", &p)) {
853 p += strspn(p, SPACE_CHARS);
854 av_strlcpy(reply->location, p , sizeof(reply->location));
855 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
856 p += strspn(p, SPACE_CHARS);
857 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
858 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
859 p += strspn(p, SPACE_CHARS);
860 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
861 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
862 p += strspn(p, SPACE_CHARS);
863 if (method && !strcmp(method, "DESCRIBE"))
864 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
865 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
866 p += strspn(p, SPACE_CHARS);
867 if (method && !strcmp(method, "PLAY"))
868 rtsp_parse_rtp_info(rt, p);
869 } else if (av_stristart(p, "Public:", &p) && rt) {
870 if (strstr(p, "GET_PARAMETER") &&
871 method && !strcmp(method, "OPTIONS"))
872 rt->get_parameter_supported = 1;
873 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
874 p += strspn(p, SPACE_CHARS);
875 rt->accept_dynamic_rate = atoi(p);
876 } else if (av_stristart(p, "Content-Type:", &p)) {
877 p += strspn(p, SPACE_CHARS);
878 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
882 /* skip a RTP/TCP interleaved packet */
883 void ff_rtsp_skip_packet(AVFormatContext *s)
885 RTSPState *rt = s->priv_data;
889 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
892 len = AV_RB16(buf + 1);
894 av_dlog(s, "skipping RTP packet len=%d\n", len);
899 if (len1 > sizeof(buf))
901 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
908 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
909 unsigned char **content_ptr,
910 int return_on_interleaved_data, const char *method)
912 RTSPState *rt = s->priv_data;
913 char buf[4096], buf1[1024], *q;
916 int ret, content_length, line_count = 0, request = 0;
917 unsigned char *content = NULL;
923 memset(reply, 0, sizeof(*reply));
925 /* parse reply (XXX: use buffers) */
926 rt->last_reply[0] = '\0';
930 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
931 av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
937 /* XXX: only parse it if first char on line ? */
938 if (return_on_interleaved_data) {
941 ff_rtsp_skip_packet(s);
942 } else if (ch != '\r') {
943 if ((q - buf) < sizeof(buf) - 1)
949 av_dlog(s, "line='%s'\n", buf);
951 /* test if last line */
955 if (line_count == 0) {
957 get_word(buf1, sizeof(buf1), &p);
958 if (!strncmp(buf1, "RTSP/", 5)) {
959 get_word(buf1, sizeof(buf1), &p);
960 reply->status_code = atoi(buf1);
961 av_strlcpy(reply->reason, p, sizeof(reply->reason));
963 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
964 get_word(buf1, sizeof(buf1), &p); // object
968 ff_rtsp_parse_line(reply, p, rt, method);
969 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
970 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
975 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
976 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
978 content_length = reply->content_length;
979 if (content_length > 0) {
980 /* leave some room for a trailing '\0' (useful for simple parsing) */
981 content = av_malloc(content_length + 1);
982 ffurl_read_complete(rt->rtsp_hd, content, content_length);
983 content[content_length] = '\0';
986 *content_ptr = content;
992 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
993 const char* ptr = buf;
995 if (!strcmp(reply->reason, "OPTIONS")) {
996 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
998 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
999 if (reply->session_id[0])
1000 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1003 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1005 av_strlcat(buf, "\r\n", sizeof(buf));
1007 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1008 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1011 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1013 rt->last_cmd_time = av_gettime();
1014 /* Even if the request from the server had data, it is not the data
1015 * that the caller wants or expects. The memory could also be leaked
1016 * if the actual following reply has content data. */
1018 av_freep(content_ptr);
1019 /* If method is set, this is called from ff_rtsp_send_cmd,
1020 * where a reply to exactly this request is awaited. For
1021 * callers from within packet receiving, we just want to
1022 * return to the caller and go back to receiving packets. */
1028 if (rt->seq != reply->seq) {
1029 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1030 rt->seq, reply->seq);
1034 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1035 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1036 reply->notice == 2306 /* Continuous Feed Terminated */) {
1037 rt->state = RTSP_STATE_IDLE;
1038 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1039 return AVERROR(EIO); /* data or server error */
1040 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1041 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1042 return AVERROR(EPERM);
1048 * Send a command to the RTSP server without waiting for the reply.
1050 * @param s RTSP (de)muxer context
1051 * @param method the method for the request
1052 * @param url the target url for the request
1053 * @param headers extra header lines to include in the request
1054 * @param send_content if non-null, the data to send as request body content
1055 * @param send_content_length the length of the send_content data, or 0 if
1056 * send_content is null
1058 * @return zero if success, nonzero otherwise
1060 static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
1061 const char *method, const char *url,
1062 const char *headers,
1063 const unsigned char *send_content,
1064 int send_content_length)
1066 RTSPState *rt = s->priv_data;
1067 char buf[4096], *out_buf;
1068 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1070 /* Add in RTSP headers */
1073 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1075 av_strlcat(buf, headers, sizeof(buf));
1076 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1077 if (rt->session_id[0] != '\0' && (!headers ||
1078 !strstr(headers, "\nIf-Match:"))) {
1079 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1082 char *str = ff_http_auth_create_response(&rt->auth_state,
1083 rt->auth, url, method);
1085 av_strlcat(buf, str, sizeof(buf));
1088 if (send_content_length > 0 && send_content)
1089 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1090 av_strlcat(buf, "\r\n", sizeof(buf));
1092 /* base64 encode rtsp if tunneling */
1093 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1094 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1095 out_buf = base64buf;
1098 av_dlog(s, "Sending:\n%s--\n", buf);
1100 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1101 if (send_content_length > 0 && send_content) {
1102 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1103 av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
1104 "with content data not supported\n");
1105 return AVERROR_PATCHWELCOME;
1107 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1109 rt->last_cmd_time = av_gettime();
1114 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1115 const char *url, const char *headers)
1117 return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1120 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1121 const char *headers, RTSPMessageHeader *reply,
1122 unsigned char **content_ptr)
1124 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1125 content_ptr, NULL, 0);
1128 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1129 const char *method, const char *url,
1131 RTSPMessageHeader *reply,
1132 unsigned char **content_ptr,
1133 const unsigned char *send_content,
1134 int send_content_length)
1136 RTSPState *rt = s->priv_data;
1137 HTTPAuthType cur_auth_type;
1138 int ret, attempts = 0;
1141 cur_auth_type = rt->auth_state.auth_type;
1142 if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1144 send_content_length)))
1147 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1151 if (reply->status_code == 401 &&
1152 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1153 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1156 if (reply->status_code > 400){
1157 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1161 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1167 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1168 int lower_transport, const char *real_challenge)
1170 RTSPState *rt = s->priv_data;
1171 int rtx = 0, j, i, err, interleave = 0, port_off;
1172 RTSPStream *rtsp_st;
1173 RTSPMessageHeader reply1, *reply = &reply1;
1175 const char *trans_pref;
1177 if (rt->transport == RTSP_TRANSPORT_RDT)
1178 trans_pref = "x-pn-tng";
1180 trans_pref = "RTP/AVP";
1182 /* default timeout: 1 minute */
1185 /* Choose a random starting offset within the first half of the
1186 * port range, to allow for a number of ports to try even if the offset
1187 * happens to be at the end of the random range. */
1188 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1189 /* even random offset */
1190 port_off -= port_off & 0x01;
1192 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1193 char transport[2048];
1196 * WMS serves all UDP data over a single connection, the RTX, which
1197 * isn't necessarily the first in the SDP but has to be the first
1198 * to be set up, else the second/third SETUP will fail with a 461.
1200 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1201 rt->server_type == RTSP_SERVER_WMS) {
1204 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1205 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1207 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1211 if (rtx == rt->nb_rtsp_streams)
1212 return -1; /* no RTX found */
1213 rtsp_st = rt->rtsp_streams[rtx];
1215 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1217 rtsp_st = rt->rtsp_streams[i];
1220 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1223 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1224 port = reply->transports[0].client_port_min;
1228 /* first try in specified port range */
1229 while (j <= rt->rtp_port_max) {
1230 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1231 "?localport=%d", j);
1232 /* we will use two ports per rtp stream (rtp and rtcp) */
1234 if (!ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1235 &s->interrupt_callback, NULL))
1238 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1243 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1245 snprintf(transport, sizeof(transport) - 1,
1246 "%s/UDP;", trans_pref);
1247 if (rt->server_type != RTSP_SERVER_REAL)
1248 av_strlcat(transport, "unicast;", sizeof(transport));
1249 av_strlcatf(transport, sizeof(transport),
1250 "client_port=%d", port);
1251 if (rt->transport == RTSP_TRANSPORT_RTP &&
1252 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1253 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1257 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1258 /* For WMS streams, the application streams are only used for
1259 * UDP. When trying to set it up for TCP streams, the server
1260 * will return an error. Therefore, we skip those streams. */
1261 if (rt->server_type == RTSP_SERVER_WMS &&
1262 (rtsp_st->stream_index < 0 ||
1263 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1266 snprintf(transport, sizeof(transport) - 1,
1267 "%s/TCP;", trans_pref);
1268 if (rt->transport != RTSP_TRANSPORT_RDT)
1269 av_strlcat(transport, "unicast;", sizeof(transport));
1270 av_strlcatf(transport, sizeof(transport),
1271 "interleaved=%d-%d",
1272 interleave, interleave + 1);
1276 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1277 snprintf(transport, sizeof(transport) - 1,
1278 "%s/UDP;multicast", trans_pref);
1281 av_strlcat(transport, ";mode=record", sizeof(transport));
1282 } else if (rt->server_type == RTSP_SERVER_REAL ||
1283 rt->server_type == RTSP_SERVER_WMS)
1284 av_strlcat(transport, ";mode=play", sizeof(transport));
1285 snprintf(cmd, sizeof(cmd),
1286 "Transport: %s\r\n",
1288 if (rt->accept_dynamic_rate)
1289 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1290 if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1291 char real_res[41], real_csum[9];
1292 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1294 av_strlcatf(cmd, sizeof(cmd),
1296 "RealChallenge2: %s, sd=%s\r\n",
1297 rt->session_id, real_res, real_csum);
1299 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1300 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1303 } else if (reply->status_code != RTSP_STATUS_OK ||
1304 reply->nb_transports != 1) {
1305 err = AVERROR_INVALIDDATA;
1309 /* XXX: same protocol for all streams is required */
1311 if (reply->transports[0].lower_transport != rt->lower_transport ||
1312 reply->transports[0].transport != rt->transport) {
1313 err = AVERROR_INVALIDDATA;
1317 rt->lower_transport = reply->transports[0].lower_transport;
1318 rt->transport = reply->transports[0].transport;
1321 /* Fail if the server responded with another lower transport mode
1322 * than what we requested. */
1323 if (reply->transports[0].lower_transport != lower_transport) {
1324 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1325 err = AVERROR_INVALIDDATA;
1329 switch(reply->transports[0].lower_transport) {
1330 case RTSP_LOWER_TRANSPORT_TCP:
1331 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1332 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1335 case RTSP_LOWER_TRANSPORT_UDP: {
1336 char url[1024], options[30] = "";
1338 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1339 av_strlcpy(options, "?connect=1", sizeof(options));
1340 /* Use source address if specified */
1341 if (reply->transports[0].source[0]) {
1342 ff_url_join(url, sizeof(url), "rtp", NULL,
1343 reply->transports[0].source,
1344 reply->transports[0].server_port_min, "%s", options);
1346 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1347 reply->transports[0].server_port_min, "%s", options);
1349 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1350 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1351 err = AVERROR_INVALIDDATA;
1354 /* Try to initialize the connection state in a
1355 * potential NAT router by sending dummy packets.
1356 * RTP/RTCP dummy packets are used for RDT, too.
1358 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1360 ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
1363 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1364 char url[1024], namebuf[50], optbuf[20] = "";
1365 struct sockaddr_storage addr;
1368 if (reply->transports[0].destination.ss_family) {
1369 addr = reply->transports[0].destination;
1370 port = reply->transports[0].port_min;
1371 ttl = reply->transports[0].ttl;
1373 addr = rtsp_st->sdp_ip;
1374 port = rtsp_st->sdp_port;
1375 ttl = rtsp_st->sdp_ttl;
1378 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1379 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1380 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1381 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1382 port, "%s", optbuf);
1383 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1384 &s->interrupt_callback, NULL) < 0) {
1385 err = AVERROR_INVALIDDATA;
1392 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1396 if (rt->nb_rtsp_streams && reply->timeout > 0)
1397 rt->timeout = reply->timeout;
1399 if (rt->server_type == RTSP_SERVER_REAL)
1400 rt->need_subscription = 1;
1405 ff_rtsp_undo_setup(s);
1409 void ff_rtsp_close_connections(AVFormatContext *s)
1411 RTSPState *rt = s->priv_data;
1412 if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
1413 ffurl_close(rt->rtsp_hd);
1414 rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1417 int ff_rtsp_connect(AVFormatContext *s)
1419 RTSPState *rt = s->priv_data;
1420 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1421 int port, err, tcp_fd;
1422 RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1423 int lower_transport_mask = 0;
1424 char real_challenge[64] = "";
1425 struct sockaddr_storage peer;
1426 socklen_t peer_len = sizeof(peer);
1428 if (rt->rtp_port_max < rt->rtp_port_min) {
1429 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1430 "than min port %d\n", rt->rtp_port_max,
1432 return AVERROR(EINVAL);
1435 if (!ff_network_init())
1436 return AVERROR(EIO);
1438 if (s->max_delay < 0) /* Not set by the caller */
1439 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1441 rt->control_transport = RTSP_MODE_PLAIN;
1442 if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
1443 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1444 rt->control_transport = RTSP_MODE_TUNNEL;
1446 /* Only pass through valid flags from here */
1447 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1450 lower_transport_mask = rt->lower_transport_mask;
1451 /* extract hostname and port */
1452 av_url_split(NULL, 0, auth, sizeof(auth),
1453 host, sizeof(host), &port, path, sizeof(path), s->filename);
1455 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1458 port = RTSP_DEFAULT_PORT;
1460 if (!lower_transport_mask)
1461 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1464 /* Only UDP or TCP - UDP multicast isn't supported. */
1465 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1466 (1 << RTSP_LOWER_TRANSPORT_TCP);
1467 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1468 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1469 "only UDP and TCP are supported for output.\n");
1470 err = AVERROR(EINVAL);
1475 /* Construct the URI used in request; this is similar to s->filename,
1476 * but with authentication credentials removed and RTSP specific options
1478 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1479 host, port, "%s", path);
1481 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1482 /* set up initial handshake for tunneling */
1483 char httpname[1024];
1484 char sessioncookie[17];
1487 ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1488 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1489 av_get_random_seed(), av_get_random_seed());
1492 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1493 &s->interrupt_callback) < 0) {
1498 /* generate GET headers */
1499 snprintf(headers, sizeof(headers),
1500 "x-sessioncookie: %s\r\n"
1501 "Accept: application/x-rtsp-tunnelled\r\n"
1502 "Pragma: no-cache\r\n"
1503 "Cache-Control: no-cache\r\n",
1505 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1507 /* complete the connection */
1508 if (ffurl_connect(rt->rtsp_hd, NULL)) {
1514 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1515 &s->interrupt_callback) < 0 ) {
1520 /* generate POST headers */
1521 snprintf(headers, sizeof(headers),
1522 "x-sessioncookie: %s\r\n"
1523 "Content-Type: application/x-rtsp-tunnelled\r\n"
1524 "Pragma: no-cache\r\n"
1525 "Cache-Control: no-cache\r\n"
1526 "Content-Length: 32767\r\n"
1527 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1529 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1530 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1532 /* Initialize the authentication state for the POST session. The HTTP
1533 * protocol implementation doesn't properly handle multi-pass
1534 * authentication for POST requests, since it would require one of
1536 * - implementing Expect: 100-continue, which many HTTP servers
1537 * don't support anyway, even less the RTSP servers that do HTTP
1539 * - sending the whole POST data until getting a 401 reply specifying
1540 * what authentication method to use, then resending all that data
1541 * - waiting for potential 401 replies directly after sending the
1542 * POST header (waiting for some unspecified time)
1543 * Therefore, we copy the full auth state, which works for both basic
1544 * and digest. (For digest, we would have to synchronize the nonce
1545 * count variable between the two sessions, if we'd do more requests
1546 * with the original session, though.)
1548 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1550 /* complete the connection */
1551 if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
1556 /* open the tcp connection */
1557 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1558 if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1559 &s->interrupt_callback, NULL) < 0) {
1563 rt->rtsp_hd_out = rt->rtsp_hd;
1567 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1568 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1569 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1570 NULL, 0, NI_NUMERICHOST);
1573 /* request options supported by the server; this also detects server
1575 for (rt->server_type = RTSP_SERVER_RTP;;) {
1577 if (rt->server_type == RTSP_SERVER_REAL)
1580 * The following entries are required for proper
1581 * streaming from a Realmedia server. They are
1582 * interdependent in some way although we currently
1583 * don't quite understand how. Values were copied
1584 * from mplayer SVN r23589.
1585 * ClientChallenge is a 16-byte ID in hex
1586 * CompanyID is a 16-byte ID in base64
1588 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1589 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1590 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1591 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1593 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1594 if (reply->status_code != RTSP_STATUS_OK) {
1595 err = AVERROR_INVALIDDATA;
1599 /* detect server type if not standard-compliant RTP */
1600 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1601 rt->server_type = RTSP_SERVER_REAL;
1603 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1604 rt->server_type = RTSP_SERVER_WMS;
1605 } else if (rt->server_type == RTSP_SERVER_REAL)
1606 strcpy(real_challenge, reply->real_challenge);
1610 if (s->iformat && CONFIG_RTSP_DEMUXER)
1611 err = ff_rtsp_setup_input_streams(s, reply);
1612 else if (CONFIG_RTSP_MUXER)
1613 err = ff_rtsp_setup_output_streams(s, host);
1618 int lower_transport = ff_log2_tab[lower_transport_mask &
1619 ~(lower_transport_mask - 1)];
1621 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1622 rt->server_type == RTSP_SERVER_REAL ?
1623 real_challenge : NULL);
1626 lower_transport_mask &= ~(1 << lower_transport);
1627 if (lower_transport_mask == 0 && err == 1) {
1628 err = AVERROR(EPROTONOSUPPORT);
1633 rt->lower_transport_mask = lower_transport_mask;
1634 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1635 rt->state = RTSP_STATE_IDLE;
1636 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1639 ff_rtsp_close_streams(s);
1640 ff_rtsp_close_connections(s);
1641 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1642 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1643 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1651 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1654 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1655 uint8_t *buf, int buf_size, int64_t wait_end)
1657 RTSPState *rt = s->priv_data;
1658 RTSPStream *rtsp_st;
1659 int n, i, ret, tcp_fd, timeout_cnt = 0;
1661 struct pollfd *p = rt->p;
1664 if (ff_check_interrupt(&s->interrupt_callback))
1665 return AVERROR_EXIT;
1666 if (wait_end && wait_end - av_gettime() < 0)
1667 return AVERROR(EAGAIN);
1670 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1671 p[max_p].fd = tcp_fd;
1672 p[max_p++].events = POLLIN;
1676 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1677 rtsp_st = rt->rtsp_streams[i];
1678 if (rtsp_st->rtp_handle) {
1679 p[max_p].fd = ffurl_get_file_handle(rtsp_st->rtp_handle);
1680 p[max_p++].events = POLLIN;
1681 p[max_p].fd = ff_rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1682 p[max_p++].events = POLLIN;
1685 n = poll(p, max_p, POLL_TIMEOUT_MS);
1687 int j = 1 - (tcp_fd == -1);
1689 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1690 rtsp_st = rt->rtsp_streams[i];
1691 if (rtsp_st->rtp_handle) {
1692 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1693 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1695 *prtsp_st = rtsp_st;
1702 #if CONFIG_RTSP_DEMUXER
1703 if (tcp_fd != -1 && p[0].revents & POLLIN) {
1704 RTSPMessageHeader reply;
1706 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1709 /* XXX: parse message */
1710 if (rt->state != RTSP_STATE_STREAMING)
1714 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1715 return AVERROR(ETIMEDOUT);
1716 } else if (n < 0 && errno != EINTR)
1717 return AVERROR(errno);
1721 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1723 RTSPState *rt = s->priv_data;
1725 RTSPStream *rtsp_st, *first_queue_st = NULL;
1726 int64_t wait_end = 0;
1728 if (rt->nb_byes == rt->nb_rtsp_streams)
1731 /* get next frames from the same RTP packet */
1732 if (rt->cur_transport_priv) {
1733 if (rt->transport == RTSP_TRANSPORT_RDT) {
1734 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1736 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1738 rt->cur_transport_priv = NULL;
1740 } else if (ret == 1) {
1743 rt->cur_transport_priv = NULL;
1746 if (rt->transport == RTSP_TRANSPORT_RTP) {
1748 int64_t first_queue_time = 0;
1749 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1750 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1754 queue_time = ff_rtp_queued_packet_time(rtpctx);
1755 if (queue_time && (queue_time - first_queue_time < 0 ||
1756 !first_queue_time)) {
1757 first_queue_time = queue_time;
1758 first_queue_st = rt->rtsp_streams[i];
1761 if (first_queue_time)
1762 wait_end = first_queue_time + s->max_delay;
1765 /* read next RTP packet */
1768 rt->recvbuf = av_malloc(RECVBUF_SIZE);
1770 return AVERROR(ENOMEM);
1773 switch(rt->lower_transport) {
1775 #if CONFIG_RTSP_DEMUXER
1776 case RTSP_LOWER_TRANSPORT_TCP:
1777 len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1780 case RTSP_LOWER_TRANSPORT_UDP:
1781 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1782 len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1783 if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1784 ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1787 if (len == AVERROR(EAGAIN) && first_queue_st &&
1788 rt->transport == RTSP_TRANSPORT_RTP) {
1789 rtsp_st = first_queue_st;
1790 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1797 if (rt->transport == RTSP_TRANSPORT_RDT) {
1798 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1800 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1802 /* Either bad packet, or a RTCP packet. Check if the
1803 * first_rtcp_ntp_time field was initialized. */
1804 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1805 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1806 /* first_rtcp_ntp_time has been initialized for this stream,
1807 * copy the same value to all other uninitialized streams,
1808 * in order to map their timestamp origin to the same ntp time
1811 AVStream *st = NULL;
1812 if (rtsp_st->stream_index >= 0)
1813 st = s->streams[rtsp_st->stream_index];
1814 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1815 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1816 AVStream *st2 = NULL;
1817 if (rt->rtsp_streams[i]->stream_index >= 0)
1818 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1819 if (rtpctx2 && st && st2 &&
1820 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1821 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1822 rtpctx2->rtcp_ts_offset = av_rescale_q(
1823 rtpctx->rtcp_ts_offset, st->time_base,
1828 if (ret == -RTCP_BYE) {
1831 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1832 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1834 if (rt->nb_byes == rt->nb_rtsp_streams)
1843 /* more packets may follow, so we save the RTP context */
1844 rt->cur_transport_priv = rtsp_st->transport_priv;
1848 #endif /* CONFIG_RTPDEC */
1850 #if CONFIG_SDP_DEMUXER
1851 static int sdp_probe(AVProbeData *p1)
1853 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1855 /* we look for a line beginning "c=IN IP" */
1856 while (p < p_end && *p != '\0') {
1857 if (p + sizeof("c=IN IP") - 1 < p_end &&
1858 av_strstart(p, "c=IN IP", NULL))
1859 return AVPROBE_SCORE_MAX / 2;
1861 while (p < p_end - 1 && *p != '\n') p++;
1870 static int sdp_read_header(AVFormatContext *s)
1872 RTSPState *rt = s->priv_data;
1873 RTSPStream *rtsp_st;
1878 if (!ff_network_init())
1879 return AVERROR(EIO);
1881 if (s->max_delay < 0) /* Not set by the caller */
1882 s->max_delay = DEFAULT_REORDERING_DELAY;
1884 /* read the whole sdp file */
1885 /* XXX: better loading */
1886 content = av_malloc(SDP_MAX_SIZE);
1887 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
1890 return AVERROR_INVALIDDATA;
1892 content[size] ='\0';
1894 err = ff_sdp_parse(s, content);
1898 /* open each RTP stream */
1899 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1901 rtsp_st = rt->rtsp_streams[i];
1903 getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1904 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1905 ff_url_join(url, sizeof(url), "rtp", NULL,
1906 namebuf, rtsp_st->sdp_port,
1907 "?localport=%d&ttl=%d&connect=%d", rtsp_st->sdp_port,
1909 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0);
1910 if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1911 &s->interrupt_callback, NULL) < 0) {
1912 err = AVERROR_INVALIDDATA;
1915 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1920 ff_rtsp_close_streams(s);
1925 static int sdp_read_close(AVFormatContext *s)
1927 ff_rtsp_close_streams(s);
1932 static const AVClass sdp_demuxer_class = {
1933 .class_name = "SDP demuxer",
1934 .item_name = av_default_item_name,
1935 .option = sdp_options,
1936 .version = LIBAVUTIL_VERSION_INT,
1939 AVInputFormat ff_sdp_demuxer = {
1941 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
1942 .priv_data_size = sizeof(RTSPState),
1943 .read_probe = sdp_probe,
1944 .read_header = sdp_read_header,
1945 .read_packet = ff_rtsp_fetch_packet,
1946 .read_close = sdp_read_close,
1947 .priv_class = &sdp_demuxer_class,
1949 #endif /* CONFIG_SDP_DEMUXER */
1951 #if CONFIG_RTP_DEMUXER
1952 static int rtp_probe(AVProbeData *p)
1954 if (av_strstart(p->filename, "rtp:", NULL))
1955 return AVPROBE_SCORE_MAX;
1959 static int rtp_read_header(AVFormatContext *s)
1961 uint8_t recvbuf[1500];
1962 char host[500], sdp[500];
1964 URLContext* in = NULL;
1966 AVCodecContext codec = { 0 };
1967 struct sockaddr_storage addr;
1969 socklen_t addrlen = sizeof(addr);
1970 RTSPState *rt = s->priv_data;
1972 if (!ff_network_init())
1973 return AVERROR(EIO);
1975 ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ,
1976 &s->interrupt_callback, NULL);
1981 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
1982 if (ret == AVERROR(EAGAIN))
1987 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1991 if ((recvbuf[0] & 0xc0) != 0x80) {
1992 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1997 if (RTP_PT_IS_RTCP(recvbuf[1]))
2000 payload_type = recvbuf[1] & 0x7f;
2003 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2007 if (ff_rtp_get_codec_info(&codec, payload_type)) {
2008 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2009 "without an SDP file describing it\n",
2013 if (codec.codec_type != AVMEDIA_TYPE_DATA) {
2014 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2015 "properly you need an SDP file "
2019 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2020 NULL, 0, s->filename);
2022 snprintf(sdp, sizeof(sdp),
2023 "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
2024 addr.ss_family == AF_INET ? 4 : 6, host,
2025 codec.codec_type == AVMEDIA_TYPE_DATA ? "application" :
2026 codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2027 port, payload_type);
2028 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
2030 ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
2033 /* sdp_read_header initializes this again */
2036 rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1;
2038 ret = sdp_read_header(s);
2049 static const AVClass rtp_demuxer_class = {
2050 .class_name = "RTP demuxer",
2051 .item_name = av_default_item_name,
2052 .option = rtp_options,
2053 .version = LIBAVUTIL_VERSION_INT,
2056 AVInputFormat ff_rtp_demuxer = {
2058 .long_name = NULL_IF_CONFIG_SMALL("RTP input format"),
2059 .priv_data_size = sizeof(RTSPState),
2060 .read_probe = rtp_probe,
2061 .read_header = rtp_read_header,
2062 .read_packet = ff_rtsp_fetch_packet,
2063 .read_close = sdp_read_close,
2064 .flags = AVFMT_NOFILE,
2065 .priv_class = &rtp_demuxer_class,
2067 #endif /* CONFIG_RTP_DEMUXER */