FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/rtsp.c
Date: 2024-02-29 09:57:37
Exec Total Coverage
Lines: 14 1515 0.9%
Functions: 2 43 4.7%
Branches: 15 1134 1.3%

Line Branch Exec Source
1 /*
2 * RTSP/SDP client
3 * Copyright (c) 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 #include "config_components.h"
23
24 #include "libavutil/avassert.h"
25 #include "libavutil/base64.h"
26 #include "libavutil/bprint.h"
27 #include "libavutil/avstring.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/parseutils.h"
31 #include "libavutil/random_seed.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/time.h"
35 #include "libavcodec/codec_desc.h"
36 #include "avformat.h"
37 #include "avio_internal.h"
38
39 #if HAVE_POLL_H
40 #include <poll.h>
41 #endif
42 #include "internal.h"
43 #include "network.h"
44 #include "os_support.h"
45 #include "http.h"
46 #include "rtsp.h"
47
48 #include "rtpdec.h"
49 #include "rtpproto.h"
50 #include "rdt.h"
51 #include "rtpdec_formats.h"
52 #include "rtpenc_chain.h"
53 #include "url.h"
54 #include "rtpenc.h"
55 #include "mpegts.h"
56 #include "version.h"
57
58 /* Default timeout values for read packet in seconds */
59 #define READ_PACKET_TIMEOUT_S 10
60 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
61 #define DEFAULT_REORDERING_DELAY 100000
62
63 #define OFFSET(x) offsetof(RTSPState, x)
64 #define DEC AV_OPT_FLAG_DECODING_PARAM
65 #define ENC AV_OPT_FLAG_ENCODING_PARAM
66
67 #define RTSP_FLAG_OPTS(name, longname) \
68 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, .unit = "rtsp_flags" }, \
69 { "filter_src", "only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, .unit = "rtsp_flags" }
70
71 #define RTSP_MEDIATYPE_OPTS(name, longname) \
72 { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1 }, INT_MIN, INT_MAX, DEC, .unit = "allowed_media_types" }, \
73 { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, .unit = "allowed_media_types" }, \
74 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, .unit = "allowed_media_types" }, \
75 { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, .unit = "allowed_media_types" }, \
76 { "subtitle", "Subtitle", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_SUBTITLE}, 0, 0, DEC, .unit = "allowed_media_types" }
77
78 #define COMMON_OPTS() \
79 { "reorder_queue_size", "set number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC }, \
80 { "buffer_size", "Underlying protocol send/receive buffer size", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC|ENC }, \
81 { "pkt_size", "Underlying protocol send packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, ENC } \
82
83
84 const AVOption ff_rtsp_options[] = {
85 { "initial_pause", "do not start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
86 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
87 { "rtsp_transport", "set RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, .unit = "rtsp_transport" }, \
88 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, .unit = "rtsp_transport" }, \
89 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, .unit = "rtsp_transport" }, \
90 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, .unit = "rtsp_transport" },
91 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, .unit = "rtsp_transport" },
92 { "https", "HTTPS tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTPS )}, 0, 0, DEC, .unit = "rtsp_transport" },
93 RTSP_FLAG_OPTS("rtsp_flags", "set RTSP flags"),
94 { "listen", "wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, .unit = "rtsp_flags" },
95 { "prefer_tcp", "try RTP via TCP first, if available", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_PREFER_TCP}, 0, 0, DEC|ENC, .unit = "rtsp_flags" },
96 { "satip_raw", "export raw MPEG-TS stream instead of demuxing", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_SATIP_RAW}, 0, 0, DEC, .unit = "rtsp_flags" },
97 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
98 { "min_port", "set minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
99 { "max_port", "set maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
100 { "listen_timeout", "set maximum timeout (in seconds) to wait for incoming connections (-1 is infinite, imply flag listen)", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC },
101 { "timeout", "set timeout (in microseconds) of socket I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT64, {.i64 = 0}, INT_MIN, INT64_MAX, DEC },
102 COMMON_OPTS(),
103 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
104 { NULL },
105 };
106
107 static const AVOption sdp_options[] = {
108 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
109 { "custom_io", "use custom I/O", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, .unit = "rtsp_flags" },
110 { "rtcp_to_source", "send RTCP packets to the source address of received packets", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_RTCP_TO_SOURCE}, 0, 0, DEC, .unit = "rtsp_flags" },
111 { "listen_timeout", "set maximum timeout (in seconds) to wait for incoming connections", OFFSET(stimeout), AV_OPT_TYPE_DURATION, {.i64 = READ_PACKET_TIMEOUT_S*1000000}, INT_MIN, INT64_MAX, DEC },
112 { "localaddr", "local address", OFFSET(localaddr),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, \
113 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
114 COMMON_OPTS(),
115 { NULL },
116 };
117
118 static const AVOption rtp_options[] = {
119 RTSP_FLAG_OPTS("rtp_flags", "set RTP flags"),
120 { "listen_timeout", "set maximum timeout (in seconds) to wait for incoming connections", OFFSET(stimeout), AV_OPT_TYPE_DURATION, {.i64 = READ_PACKET_TIMEOUT_S*1000000}, INT_MIN, INT64_MAX, DEC },
121 { "localaddr", "local address", OFFSET(localaddr),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, \
122 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
123 COMMON_OPTS(),
124 { NULL },
125 };
126
127
128 static AVDictionary *map_to_opts(RTSPState *rt)
129 {
130 AVDictionary *opts = NULL;
131
132 av_dict_set_int(&opts, "buffer_size", rt->buffer_size, 0);
133 av_dict_set_int(&opts, "pkt_size", rt->pkt_size, 0);
134 if (rt->localaddr && rt->localaddr[0])
135 av_dict_set(&opts, "localaddr", rt->localaddr, 0);
136
137 return opts;
138 }
139
140 static void get_word_until_chars(char *buf, int buf_size,
141 const char *sep, const char **pp)
142 {
143 const char *p;
144 char *q;
145
146 p = *pp;
147 p += strspn(p, SPACE_CHARS);
148 q = buf;
149 while (!strchr(sep, *p) && *p != '\0') {
150 if ((q - buf) < buf_size - 1)
151 *q++ = *p;
152 p++;
153 }
154 if (buf_size > 0)
155 *q = '\0';
156 *pp = p;
157 }
158
159 static void get_word_sep(char *buf, int buf_size, const char *sep,
160 const char **pp)
161 {
162 if (**pp == '/') (*pp)++;
163 get_word_until_chars(buf, buf_size, sep, pp);
164 }
165
166 static void get_word(char *buf, int buf_size, const char **pp)
167 {
168 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
169 }
170
171 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
172 * and end time.
173 * Used for seeking in the rtp stream.
174 */
175 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
176 {
177 char buf[256];
178
179 p += strspn(p, SPACE_CHARS);
180 if (!av_stristart(p, "npt=", &p))
181 return;
182
183 *start = AV_NOPTS_VALUE;
184 *end = AV_NOPTS_VALUE;
185
186 get_word_sep(buf, sizeof(buf), "-", &p);
187 if (av_parse_time(start, buf, 1) < 0)
188 return;
189 if (*p == '-') {
190 p++;
191 get_word_sep(buf, sizeof(buf), "-", &p);
192 if (av_parse_time(end, buf, 1) < 0)
193 av_log(NULL, AV_LOG_DEBUG, "Failed to parse interval end specification '%s'\n", buf);
194 }
195 }
196
197 static int get_sockaddr(AVFormatContext *s,
198 const char *buf, struct sockaddr_storage *sock)
199 {
200 struct addrinfo hints = { 0 }, *ai = NULL;
201 int ret;
202
203 hints.ai_flags = AI_NUMERICHOST;
204 if ((ret = getaddrinfo(buf, NULL, &hints, &ai))) {
205 av_log(s, AV_LOG_ERROR, "getaddrinfo(%s): %s\n",
206 buf,
207 gai_strerror(ret));
208 return -1;
209 }
210 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
211 freeaddrinfo(ai);
212 return 0;
213 }
214
215 #if CONFIG_RTPDEC
216 static void init_rtp_handler(const RTPDynamicProtocolHandler *handler,
217 RTSPStream *rtsp_st, AVStream *st)
218 {
219 AVCodecParameters *par = st ? st->codecpar : NULL;
220 if (!handler)
221 return;
222 if (par)
223 par->codec_id = handler->codec_id;
224 rtsp_st->dynamic_handler = handler;
225 if (st)
226 ffstream(st)->need_parsing = handler->need_parsing;
227 if (handler->priv_data_size) {
228 rtsp_st->dynamic_protocol_context = av_mallocz(handler->priv_data_size);
229 if (!rtsp_st->dynamic_protocol_context)
230 rtsp_st->dynamic_handler = NULL;
231 }
232 }
233
234 static void finalize_rtp_handler_init(AVFormatContext *s, RTSPStream *rtsp_st,
235 AVStream *st)
236 {
237 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init) {
238 int ret = rtsp_st->dynamic_handler->init(s, st ? st->index : -1,
239 rtsp_st->dynamic_protocol_context);
240 if (ret < 0) {
241 if (rtsp_st->dynamic_protocol_context) {
242 if (rtsp_st->dynamic_handler->close)
243 rtsp_st->dynamic_handler->close(
244 rtsp_st->dynamic_protocol_context);
245 av_free(rtsp_st->dynamic_protocol_context);
246 }
247 rtsp_st->dynamic_protocol_context = NULL;
248 rtsp_st->dynamic_handler = NULL;
249 }
250 }
251 }
252
253 #if CONFIG_RTSP_DEMUXER
254 static int init_satip_stream(AVFormatContext *s)
255 {
256 RTSPState *rt = s->priv_data;
257 RTSPStream *rtsp_st = av_mallocz(sizeof(RTSPStream));
258 if (!rtsp_st)
259 return AVERROR(ENOMEM);
260 dynarray_add(&rt->rtsp_streams,
261 &rt->nb_rtsp_streams, rtsp_st);
262
263 rtsp_st->sdp_payload_type = 33; // MP2T
264 av_strlcpy(rtsp_st->control_url,
265 rt->control_uri, sizeof(rtsp_st->control_url));
266
267 if (rt->rtsp_flags & RTSP_FLAG_SATIP_RAW) {
268 AVStream *st = avformat_new_stream(s, NULL);
269 if (!st)
270 return AVERROR(ENOMEM);
271 st->id = rt->nb_rtsp_streams - 1;
272 rtsp_st->stream_index = st->index;
273 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
274 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
275 } else {
276 rtsp_st->stream_index = -1;
277 init_rtp_handler(&ff_mpegts_dynamic_handler, rtsp_st, NULL);
278 finalize_rtp_handler_init(s, rtsp_st, NULL);
279 }
280 return 0;
281 }
282 #endif
283
284 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
285 static int sdp_parse_rtpmap(AVFormatContext *s,
286 AVStream *st, RTSPStream *rtsp_st,
287 int payload_type, const char *p)
288 {
289 AVCodecParameters *par = st->codecpar;
290 char buf[256];
291 int i;
292 const AVCodecDescriptor *desc;
293 const char *c_name;
294
295 /* See if we can handle this kind of payload.
296 * The space should normally not be there but some Real streams or
297 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
298 * have a trailing space. */
299 get_word_sep(buf, sizeof(buf), "/ ", &p);
300 if (payload_type < RTP_PT_PRIVATE) {
301 /* We are in a standard case
302 * (from http://www.iana.org/assignments/rtp-parameters). */
303 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
304 }
305
306 if (par->codec_id == AV_CODEC_ID_NONE) {
307 const RTPDynamicProtocolHandler *handler =
308 ff_rtp_handler_find_by_name(buf, par->codec_type);
309 init_rtp_handler(handler, rtsp_st, st);
310 /* If no dynamic handler was found, check with the list of standard
311 * allocated types, if such a stream for some reason happens to
312 * use a private payload type. This isn't handled in rtpdec.c, since
313 * the format name from the rtpmap line never is passed into rtpdec. */
314 if (!rtsp_st->dynamic_handler)
315 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
316 }
317
318 desc = avcodec_descriptor_get(par->codec_id);
319 if (desc && desc->name)
320 c_name = desc->name;
321 else
322 c_name = "(null)";
323
324 get_word_sep(buf, sizeof(buf), "/", &p);
325 i = atoi(buf);
326 switch (par->codec_type) {
327 case AVMEDIA_TYPE_AUDIO:
328 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
329 par->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
330 par->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
331 if (i > 0) {
332 par->sample_rate = i;
333 avpriv_set_pts_info(st, 32, 1, par->sample_rate);
334 get_word_sep(buf, sizeof(buf), "/", &p);
335 i = atoi(buf);
336 if (i > 0)
337 av_channel_layout_default(&par->ch_layout, i);
338 }
339 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
340 par->sample_rate);
341 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
342 par->ch_layout.nb_channels);
343 break;
344 case AVMEDIA_TYPE_VIDEO:
345 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
346 if (i > 0)
347 avpriv_set_pts_info(st, 32, 1, i);
348 break;
349 default:
350 break;
351 }
352 finalize_rtp_handler_init(s, rtsp_st, st);
353 return 0;
354 }
355
356 /* parse the attribute line from the fmtp a line of an sdp response. This
357 * is broken out as a function because it is used in rtp_h264.c, which is
358 * forthcoming. */
359 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
360 char *value, int value_size)
361 {
362 *p += strspn(*p, SPACE_CHARS);
363 if (**p) {
364 get_word_sep(attr, attr_size, "=", p);
365 if (**p == '=')
366 (*p)++;
367 get_word_sep(value, value_size, ";", p);
368 if (**p == ';')
369 (*p)++;
370 return 1;
371 }
372 return 0;
373 }
374
375 typedef struct SDPParseState {
376 /* SDP only */
377 struct sockaddr_storage default_ip;
378 int default_ttl;
379 int skip_media; ///< set if an unknown m= line occurs
380 int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
381 struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
382 int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
383 struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
384 int seen_rtpmap;
385 int seen_fmtp;
386 char delayed_fmtp[2048];
387 } SDPParseState;
388
389 static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
390 struct RTSPSource ***dest, int *dest_count)
391 {
392 RTSPSource *rtsp_src, *rtsp_src2;
393 int i;
394 for (i = 0; i < count; i++) {
395 rtsp_src = addrs[i];
396 rtsp_src2 = av_memdup(rtsp_src, sizeof(*rtsp_src));
397 if (!rtsp_src2)
398 continue;
399 dynarray_add(dest, dest_count, rtsp_src2);
400 }
401 }
402
403 static void parse_fmtp(AVFormatContext *s, RTSPState *rt,
404 int payload_type, const char *line)
405 {
406 int i;
407
408 for (i = 0; i < rt->nb_rtsp_streams; i++) {
409 RTSPStream *rtsp_st = rt->rtsp_streams[i];
410 if (rtsp_st->sdp_payload_type == payload_type &&
411 rtsp_st->dynamic_handler &&
412 rtsp_st->dynamic_handler->parse_sdp_a_line) {
413 rtsp_st->dynamic_handler->parse_sdp_a_line(s, rtsp_st->stream_index,
414 rtsp_st->dynamic_protocol_context, line);
415 }
416 }
417 }
418
419 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
420 int letter, const char *buf)
421 {
422 RTSPState *rt = s->priv_data;
423 char buf1[64], st_type[64];
424 const char *p;
425 enum AVMediaType codec_type;
426 int payload_type;
427 AVStream *st;
428 RTSPStream *rtsp_st;
429 RTSPSource *rtsp_src;
430 struct sockaddr_storage sdp_ip;
431 int ttl;
432
433 av_log(s, AV_LOG_TRACE, "sdp: %c='%s'\n", letter, buf);
434
435 p = buf;
436 if (s1->skip_media && letter != 'm')
437 return;
438 switch (letter) {
439 case 'c':
440 get_word(buf1, sizeof(buf1), &p);
441 if (strcmp(buf1, "IN") != 0)
442 return;
443 get_word(buf1, sizeof(buf1), &p);
444 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
445 return;
446 get_word_sep(buf1, sizeof(buf1), "/", &p);
447 if (get_sockaddr(s, buf1, &sdp_ip))
448 return;
449 ttl = 16;
450 if (*p == '/') {
451 p++;
452 get_word_sep(buf1, sizeof(buf1), "/", &p);
453 ttl = atoi(buf1);
454 }
455 if (s->nb_streams == 0) {
456 s1->default_ip = sdp_ip;
457 s1->default_ttl = ttl;
458 } else {
459 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
460 rtsp_st->sdp_ip = sdp_ip;
461 rtsp_st->sdp_ttl = ttl;
462 }
463 break;
464 case 's':
465 av_dict_set(&s->metadata, "title", p, 0);
466 break;
467 case 'i':
468 if (s->nb_streams == 0) {
469 av_dict_set(&s->metadata, "comment", p, 0);
470 break;
471 }
472 break;
473 case 'm':
474 /* new stream */
475 s1->skip_media = 0;
476 s1->seen_fmtp = 0;
477 s1->seen_rtpmap = 0;
478 codec_type = AVMEDIA_TYPE_UNKNOWN;
479 get_word(st_type, sizeof(st_type), &p);
480 if (!strcmp(st_type, "audio")) {
481 codec_type = AVMEDIA_TYPE_AUDIO;
482 } else if (!strcmp(st_type, "video")) {
483 codec_type = AVMEDIA_TYPE_VIDEO;
484 } else if (!strcmp(st_type, "application")) {
485 codec_type = AVMEDIA_TYPE_DATA;
486 } else if (!strcmp(st_type, "text")) {
487 codec_type = AVMEDIA_TYPE_SUBTITLE;
488 }
489 if (codec_type == AVMEDIA_TYPE_UNKNOWN ||
490 !(rt->media_type_mask & (1 << codec_type)) ||
491 rt->nb_rtsp_streams >= s->max_streams
492 ) {
493 s1->skip_media = 1;
494 return;
495 }
496 rtsp_st = av_mallocz(sizeof(RTSPStream));
497 if (!rtsp_st)
498 return;
499 rtsp_st->stream_index = -1;
500 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
501
502 rtsp_st->sdp_ip = s1->default_ip;
503 rtsp_st->sdp_ttl = s1->default_ttl;
504
505 copy_default_source_addrs(s1->default_include_source_addrs,
506 s1->nb_default_include_source_addrs,
507 &rtsp_st->include_source_addrs,
508 &rtsp_st->nb_include_source_addrs);
509 copy_default_source_addrs(s1->default_exclude_source_addrs,
510 s1->nb_default_exclude_source_addrs,
511 &rtsp_st->exclude_source_addrs,
512 &rtsp_st->nb_exclude_source_addrs);
513
514 get_word(buf1, sizeof(buf1), &p); /* port */
515 rtsp_st->sdp_port = atoi(buf1);
516
517 get_word(buf1, sizeof(buf1), &p); /* protocol */
518 if (!strcmp(buf1, "udp"))
519 rt->transport = RTSP_TRANSPORT_RAW;
520 else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
521 rtsp_st->feedback = 1;
522
523 /* XXX: handle list of formats */
524 get_word(buf1, sizeof(buf1), &p); /* format list */
525 rtsp_st->sdp_payload_type = atoi(buf1);
526
527 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
528 /* no corresponding stream */
529 if (rt->transport == RTSP_TRANSPORT_RAW) {
530 if (CONFIG_RTPDEC && !rt->ts)
531 rt->ts = avpriv_mpegts_parse_open(s);
532 } else {
533 const RTPDynamicProtocolHandler *handler;
534 handler = ff_rtp_handler_find_by_id(
535 rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
536 init_rtp_handler(handler, rtsp_st, NULL);
537 finalize_rtp_handler_init(s, rtsp_st, NULL);
538 }
539 } else if (rt->server_type == RTSP_SERVER_WMS &&
540 codec_type == AVMEDIA_TYPE_DATA) {
541 /* RTX stream, a stream that carries all the other actual
542 * audio/video streams. Don't expose this to the callers. */
543 } else {
544 st = avformat_new_stream(s, NULL);
545 if (!st)
546 return;
547 st->id = rt->nb_rtsp_streams - 1;
548 rtsp_st->stream_index = st->index;
549 st->codecpar->codec_type = codec_type;
550 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
551 const RTPDynamicProtocolHandler *handler;
552 /* if standard payload type, we can find the codec right now */
553 ff_rtp_get_codec_info(st->codecpar, rtsp_st->sdp_payload_type);
554 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
555 st->codecpar->sample_rate > 0)
556 avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
557 /* Even static payload types may need a custom depacketizer */
558 handler = ff_rtp_handler_find_by_id(
559 rtsp_st->sdp_payload_type, st->codecpar->codec_type);
560 init_rtp_handler(handler, rtsp_st, st);
561 finalize_rtp_handler_init(s, rtsp_st, st);
562 }
563 if (rt->default_lang[0])
564 av_dict_set(&st->metadata, "language", rt->default_lang, 0);
565 }
566 /* put a default control url */
567 av_strlcpy(rtsp_st->control_url, rt->control_uri,
568 sizeof(rtsp_st->control_url));
569 break;
570 case 'a':
571 if (av_strstart(p, "control:", &p)) {
572 if (rt->nb_rtsp_streams == 0) {
573 if (!strncmp(p, "rtsp://", 7))
574 av_strlcpy(rt->control_uri, p,
575 sizeof(rt->control_uri));
576 } else {
577 char proto[32];
578 /* get the control url */
579 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
580
581 /* XXX: may need to add full url resolution */
582 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
583 NULL, NULL, 0, p);
584 if (proto[0] == '\0') {
585 /* relative control URL */
586 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
587 av_strlcat(rtsp_st->control_url, "/",
588 sizeof(rtsp_st->control_url));
589 av_strlcat(rtsp_st->control_url, p,
590 sizeof(rtsp_st->control_url));
591 } else
592 av_strlcpy(rtsp_st->control_url, p,
593 sizeof(rtsp_st->control_url));
594 }
595 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
596 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
597 get_word(buf1, sizeof(buf1), &p);
598 payload_type = atoi(buf1);
599 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
600 if (rtsp_st->stream_index >= 0) {
601 st = s->streams[rtsp_st->stream_index];
602 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
603 }
604 s1->seen_rtpmap = 1;
605 if (s1->seen_fmtp) {
606 parse_fmtp(s, rt, payload_type, s1->delayed_fmtp);
607 }
608 } else if (av_strstart(p, "fmtp:", &p) ||
609 av_strstart(p, "framesize:", &p)) {
610 // let dynamic protocol handlers have a stab at the line.
611 get_word(buf1, sizeof(buf1), &p);
612 payload_type = atoi(buf1);
613 if (s1->seen_rtpmap) {
614 parse_fmtp(s, rt, payload_type, buf);
615 } else {
616 s1->seen_fmtp = 1;
617 av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp));
618 }
619 } else if (av_strstart(p, "ssrc:", &p) && s->nb_streams > 0) {
620 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
621 get_word(buf1, sizeof(buf1), &p);
622 rtsp_st->ssrc = strtoll(buf1, NULL, 10);
623 } else if (av_strstart(p, "range:", &p)) {
624 int64_t start, end;
625
626 // this is so that seeking on a streamed file can work.
627 rtsp_parse_range_npt(p, &start, &end);
628 s->start_time = start;
629 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
630 s->duration = (end == AV_NOPTS_VALUE) ?
631 AV_NOPTS_VALUE : end - start;
632 } else if (av_strstart(p, "lang:", &p)) {
633 if (s->nb_streams > 0) {
634 get_word(buf1, sizeof(buf1), &p);
635 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
636 if (rtsp_st->stream_index >= 0) {
637 st = s->streams[rtsp_st->stream_index];
638 av_dict_set(&st->metadata, "language", buf1, 0);
639 }
640 } else
641 get_word(rt->default_lang, sizeof(rt->default_lang), &p);
642 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
643 if (atoi(p) == 1)
644 rt->transport = RTSP_TRANSPORT_RDT;
645 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
646 s->nb_streams > 0) {
647 st = s->streams[s->nb_streams - 1];
648 st->codecpar->sample_rate = atoi(p);
649 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
650 // RFC 4568
651 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
652 get_word(buf1, sizeof(buf1), &p); // ignore tag
653 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
654 p += strspn(p, SPACE_CHARS);
655 if (av_strstart(p, "inline:", &p))
656 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
657 } else if (av_strstart(p, "source-filter:", &p)) {
658 int exclude = 0;
659 get_word(buf1, sizeof(buf1), &p);
660 if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
661 return;
662 exclude = !strcmp(buf1, "excl");
663
664 get_word(buf1, sizeof(buf1), &p);
665 if (strcmp(buf1, "IN") != 0)
666 return;
667 get_word(buf1, sizeof(buf1), &p);
668 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
669 return;
670 // not checking that the destination address actually matches or is wildcard
671 get_word(buf1, sizeof(buf1), &p);
672
673 while (*p != '\0') {
674 rtsp_src = av_mallocz(sizeof(*rtsp_src));
675 if (!rtsp_src)
676 return;
677 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
678 if (exclude) {
679 if (s->nb_streams == 0) {
680 dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
681 } else {
682 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
683 dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
684 }
685 } else {
686 if (s->nb_streams == 0) {
687 dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
688 } else {
689 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
690 dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
691 }
692 }
693 }
694 } else {
695 if (rt->server_type == RTSP_SERVER_WMS)
696 ff_wms_parse_sdp_a_line(s, p);
697 if (s->nb_streams > 0) {
698 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
699
700 if (rt->server_type == RTSP_SERVER_REAL)
701 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
702
703 if (rtsp_st->dynamic_handler &&
704 rtsp_st->dynamic_handler->parse_sdp_a_line)
705 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
706 rtsp_st->stream_index,
707 rtsp_st->dynamic_protocol_context, buf);
708 }
709 }
710 break;
711 }
712 }
713
714 int ff_sdp_parse(AVFormatContext *s, const char *content)
715 {
716 const char *p;
717 int letter, i;
718 char buf[SDP_MAX_SIZE], *q;
719 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
720
721 p = content;
722 for (;;) {
723 p += strspn(p, SPACE_CHARS);
724 letter = *p;
725 if (letter == '\0')
726 break;
727 p++;
728 if (*p != '=')
729 goto next_line;
730 p++;
731 /* get the content */
732 q = buf;
733 while (*p != '\n' && *p != '\r' && *p != '\0') {
734 if ((q - buf) < sizeof(buf) - 1)
735 *q++ = *p;
736 p++;
737 }
738 *q = '\0';
739 sdp_parse_line(s, s1, letter, buf);
740 next_line:
741 while (*p != '\n' && *p != '\0')
742 p++;
743 if (*p == '\n')
744 p++;
745 }
746
747 for (i = 0; i < s1->nb_default_include_source_addrs; i++)
748 av_freep(&s1->default_include_source_addrs[i]);
749 av_freep(&s1->default_include_source_addrs);
750 for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
751 av_freep(&s1->default_exclude_source_addrs[i]);
752 av_freep(&s1->default_exclude_source_addrs);
753
754 return 0;
755 }
756 #endif /* CONFIG_RTPDEC */
757
758 void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
759 {
760 RTSPState *rt = s->priv_data;
761 int i;
762
763 for (i = 0; i < rt->nb_rtsp_streams; i++) {
764 RTSPStream *rtsp_st = rt->rtsp_streams[i];
765 if (!rtsp_st)
766 continue;
767 if (rtsp_st->transport_priv) {
768 if (s->oformat) {
769 AVFormatContext *rtpctx = rtsp_st->transport_priv;
770 av_write_trailer(rtpctx);
771 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
772 if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
773 ff_rtsp_tcp_write_packet(s, rtsp_st);
774 ffio_free_dyn_buf(&rtpctx->pb);
775 } else {
776 avio_closep(&rtpctx->pb);
777 }
778 avformat_free_context(rtpctx);
779 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
780 ff_rdt_parse_close(rtsp_st->transport_priv);
781 else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
782 ff_rtp_parse_close(rtsp_st->transport_priv);
783 }
784 rtsp_st->transport_priv = NULL;
785 ffurl_closep(&rtsp_st->rtp_handle);
786 }
787 }
788
789 /* close and free RTSP streams */
790 void ff_rtsp_close_streams(AVFormatContext *s)
791 {
792 RTSPState *rt = s->priv_data;
793 int i, j;
794 RTSPStream *rtsp_st;
795
796 ff_rtsp_undo_setup(s, 0);
797 for (i = 0; i < rt->nb_rtsp_streams; i++) {
798 rtsp_st = rt->rtsp_streams[i];
799 if (rtsp_st) {
800 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) {
801 if (rtsp_st->dynamic_handler->close)
802 rtsp_st->dynamic_handler->close(
803 rtsp_st->dynamic_protocol_context);
804 av_free(rtsp_st->dynamic_protocol_context);
805 }
806 for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
807 av_freep(&rtsp_st->include_source_addrs[j]);
808 av_freep(&rtsp_st->include_source_addrs);
809 for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
810 av_freep(&rtsp_st->exclude_source_addrs[j]);
811 av_freep(&rtsp_st->exclude_source_addrs);
812
813 av_freep(&rtsp_st);
814 }
815 }
816 av_freep(&rt->rtsp_streams);
817 if (rt->asf_ctx) {
818 avformat_close_input(&rt->asf_ctx);
819 }
820 if (CONFIG_RTPDEC && rt->ts)
821 avpriv_mpegts_parse_close(rt->ts);
822 av_freep(&rt->p);
823 av_freep(&rt->recvbuf);
824 }
825
826 int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
827 {
828 RTSPState *rt = s->priv_data;
829 AVStream *st = NULL;
830 int reordering_queue_size = rt->reordering_queue_size;
831 if (reordering_queue_size < 0) {
832 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
833 reordering_queue_size = 0;
834 else
835 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
836 }
837
838 /* open the RTP context */
839 if (rtsp_st->stream_index >= 0)
840 st = s->streams[rtsp_st->stream_index];
841 if (!st)
842 s->ctx_flags |= AVFMTCTX_NOHEADER;
843
844 if (CONFIG_RTSP_MUXER && s->oformat && st) {
845 int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
846 s, st, rtsp_st->rtp_handle,
847 rt->pkt_size,
848 rtsp_st->stream_index);
849 /* Ownership of rtp_handle is passed to the rtp mux context */
850 rtsp_st->rtp_handle = NULL;
851 if (ret < 0)
852 return ret;
853 st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
854 } else if (rt->transport == RTSP_TRANSPORT_RAW) {
855 return 0; // Don't need to open any parser here
856 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT && st)
857 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
858 rtsp_st->dynamic_protocol_context,
859 rtsp_st->dynamic_handler);
860 else if (CONFIG_RTPDEC)
861 rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
862 rtsp_st->sdp_payload_type,
863 reordering_queue_size);
864
865 if (!rtsp_st->transport_priv) {
866 return AVERROR(ENOMEM);
867 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP &&
868 s->iformat) {
869 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
870 rtpctx->ssrc = rtsp_st->ssrc;
871 if (rtsp_st->dynamic_handler) {
872 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
873 rtsp_st->dynamic_protocol_context,
874 rtsp_st->dynamic_handler);
875 }
876 if (rtsp_st->crypto_suite[0])
877 ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
878 rtsp_st->crypto_suite,
879 rtsp_st->crypto_params);
880 }
881
882 return 0;
883 }
884
885 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
886 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
887 {
888 const char *q;
889 char *p;
890 int v;
891
892 q = *pp;
893 q += strspn(q, SPACE_CHARS);
894 v = strtol(q, &p, 10);
895 if (*p == '-') {
896 p++;
897 *min_ptr = v;
898 v = strtol(p, &p, 10);
899 *max_ptr = v;
900 } else {
901 *min_ptr = v;
902 *max_ptr = v;
903 }
904 *pp = p;
905 }
906
907 /* XXX: only one transport specification is parsed */
908 static void rtsp_parse_transport(AVFormatContext *s,
909 RTSPMessageHeader *reply, const char *p)
910 {
911 char transport_protocol[16];
912 char profile[16];
913 char lower_transport[16];
914 char parameter[16];
915 RTSPTransportField *th;
916 char buf[256];
917
918 reply->nb_transports = 0;
919
920 for (;;) {
921 p += strspn(p, SPACE_CHARS);
922 if (*p == '\0')
923 break;
924
925 th = &reply->transports[reply->nb_transports];
926
927 get_word_sep(transport_protocol, sizeof(transport_protocol),
928 "/", &p);
929 if (!av_strcasecmp (transport_protocol, "rtp")) {
930 get_word_sep(profile, sizeof(profile), "/;,", &p);
931 lower_transport[0] = '\0';
932 /* rtp/avp/<protocol> */
933 if (*p == '/') {
934 get_word_sep(lower_transport, sizeof(lower_transport),
935 ";,", &p);
936 }
937 th->transport = RTSP_TRANSPORT_RTP;
938 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
939 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
940 /* x-pn-tng/<protocol> */
941 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
942 profile[0] = '\0';
943 th->transport = RTSP_TRANSPORT_RDT;
944 } else if (!av_strcasecmp(transport_protocol, "raw")) {
945 get_word_sep(profile, sizeof(profile), "/;,", &p);
946 lower_transport[0] = '\0';
947 /* raw/raw/<protocol> */
948 if (*p == '/') {
949 get_word_sep(lower_transport, sizeof(lower_transport),
950 ";,", &p);
951 }
952 th->transport = RTSP_TRANSPORT_RAW;
953 } else {
954 break;
955 }
956 if (!av_strcasecmp(lower_transport, "TCP"))
957 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
958 else
959 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
960
961 if (*p == ';')
962 p++;
963 /* get each parameter */
964 while (*p != '\0' && *p != ',') {
965 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
966 if (!strcmp(parameter, "port")) {
967 if (*p == '=') {
968 p++;
969 rtsp_parse_range(&th->port_min, &th->port_max, &p);
970 }
971 } else if (!strcmp(parameter, "client_port")) {
972 if (*p == '=') {
973 p++;
974 rtsp_parse_range(&th->client_port_min,
975 &th->client_port_max, &p);
976 }
977 } else if (!strcmp(parameter, "server_port")) {
978 if (*p == '=') {
979 p++;
980 rtsp_parse_range(&th->server_port_min,
981 &th->server_port_max, &p);
982 }
983 } else if (!strcmp(parameter, "interleaved")) {
984 if (*p == '=') {
985 p++;
986 rtsp_parse_range(&th->interleaved_min,
987 &th->interleaved_max, &p);
988 }
989 } else if (!strcmp(parameter, "multicast")) {
990 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
991 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
992 } else if (!strcmp(parameter, "ttl")) {
993 if (*p == '=') {
994 char *end;
995 p++;
996 th->ttl = strtol(p, &end, 10);
997 p = end;
998 }
999 } else if (!strcmp(parameter, "destination")) {
1000 if (*p == '=') {
1001 p++;
1002 get_word_sep(buf, sizeof(buf), ";,", &p);
1003 get_sockaddr(s, buf, &th->destination);
1004 }
1005 } else if (!strcmp(parameter, "source")) {
1006 if (*p == '=') {
1007 p++;
1008 get_word_sep(buf, sizeof(buf), ";,", &p);
1009 av_strlcpy(th->source, buf, sizeof(th->source));
1010 }
1011 } else if (!strcmp(parameter, "mode")) {
1012 if (*p == '=') {
1013 p++;
1014 get_word_sep(buf, sizeof(buf), ";, ", &p);
1015 if (!av_strcasecmp(buf, "record") ||
1016 !av_strcasecmp(buf, "receive"))
1017 th->mode_record = 1;
1018 }
1019 }
1020
1021 while (*p != ';' && *p != '\0' && *p != ',')
1022 p++;
1023 if (*p == ';')
1024 p++;
1025 }
1026 if (*p == ',')
1027 p++;
1028
1029 reply->nb_transports++;
1030 if (reply->nb_transports >= RTSP_MAX_TRANSPORTS)
1031 break;
1032 }
1033 }
1034
1035 static void handle_rtp_info(RTSPState *rt, const char *url,
1036 uint32_t seq, uint32_t rtptime)
1037 {
1038 int i;
1039 if (!rtptime || !url[0])
1040 return;
1041 if (rt->transport != RTSP_TRANSPORT_RTP)
1042 return;
1043 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1044 RTSPStream *rtsp_st = rt->rtsp_streams[i];
1045 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1046 if (!rtpctx)
1047 continue;
1048 if (!strcmp(rtsp_st->control_url, url)) {
1049 rtpctx->base_timestamp = rtptime;
1050 break;
1051 }
1052 }
1053 }
1054
1055 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
1056 {
1057 int read = 0;
1058 char key[20], value[MAX_URL_SIZE], url[MAX_URL_SIZE] = "";
1059 uint32_t seq = 0, rtptime = 0;
1060
1061 for (;;) {
1062 p += strspn(p, SPACE_CHARS);
1063 if (!*p)
1064 break;
1065 get_word_sep(key, sizeof(key), "=", &p);
1066 if (*p != '=')
1067 break;
1068 p++;
1069 get_word_sep(value, sizeof(value), ";, ", &p);
1070 read++;
1071 if (!strcmp(key, "url"))
1072 av_strlcpy(url, value, sizeof(url));
1073 else if (!strcmp(key, "seq"))
1074 seq = strtoul(value, NULL, 10);
1075 else if (!strcmp(key, "rtptime"))
1076 rtptime = strtoul(value, NULL, 10);
1077 if (*p == ',') {
1078 handle_rtp_info(rt, url, seq, rtptime);
1079 url[0] = '\0';
1080 seq = rtptime = 0;
1081 read = 0;
1082 }
1083 if (*p)
1084 p++;
1085 }
1086 if (read > 0)
1087 handle_rtp_info(rt, url, seq, rtptime);
1088 }
1089
1090 void ff_rtsp_parse_line(AVFormatContext *s,
1091 RTSPMessageHeader *reply, const char *buf,
1092 RTSPState *rt, const char *method)
1093 {
1094 const char *p;
1095
1096 /* NOTE: we do case independent match for broken servers */
1097 p = buf;
1098 if (av_stristart(p, "Session:", &p)) {
1099 int t;
1100 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
1101 if (av_stristart(p, ";timeout=", &p) &&
1102 (t = strtol(p, NULL, 10)) > 0) {
1103 reply->timeout = t;
1104 }
1105 } else if (av_stristart(p, "Content-Length:", &p)) {
1106 reply->content_length = strtol(p, NULL, 10);
1107 } else if (av_stristart(p, "Transport:", &p)) {
1108 rtsp_parse_transport(s, reply, p);
1109 } else if (av_stristart(p, "CSeq:", &p)) {
1110 reply->seq = strtol(p, NULL, 10);
1111 } else if (av_stristart(p, "Range:", &p)) {
1112 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1113 } else if (av_stristart(p, "RealChallenge1:", &p)) {
1114 p += strspn(p, SPACE_CHARS);
1115 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1116 } else if (av_stristart(p, "Server:", &p)) {
1117 p += strspn(p, SPACE_CHARS);
1118 av_strlcpy(reply->server, p, sizeof(reply->server));
1119 } else if (av_stristart(p, "Notice:", &p) ||
1120 av_stristart(p, "X-Notice:", &p)) {
1121 reply->notice = strtol(p, NULL, 10);
1122 } else if (av_stristart(p, "Location:", &p)) {
1123 p += strspn(p, SPACE_CHARS);
1124 av_strlcpy(reply->location, p , sizeof(reply->location));
1125 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
1126 p += strspn(p, SPACE_CHARS);
1127 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
1128 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1129 p += strspn(p, SPACE_CHARS);
1130 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1131 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1132 p += strspn(p, SPACE_CHARS);
1133 if (method && !strcmp(method, "DESCRIBE"))
1134 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1135 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
1136 p += strspn(p, SPACE_CHARS);
1137 if (method && !strcmp(method, "PLAY"))
1138 rtsp_parse_rtp_info(rt, p);
1139 } else if (av_stristart(p, "Public:", &p) && rt) {
1140 if (strstr(p, "GET_PARAMETER") &&
1141 method && !strcmp(method, "OPTIONS"))
1142 rt->get_parameter_supported = 1;
1143 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
1144 p += strspn(p, SPACE_CHARS);
1145 rt->accept_dynamic_rate = atoi(p);
1146 } else if (av_stristart(p, "Content-Type:", &p)) {
1147 p += strspn(p, SPACE_CHARS);
1148 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1149 } else if (av_stristart(p, "com.ses.streamID:", &p)) {
1150 p += strspn(p, SPACE_CHARS);
1151 av_strlcpy(reply->stream_id, p, sizeof(reply->stream_id));
1152 }
1153 }
1154
1155 /* skip a RTP/TCP interleaved packet */
1156 int ff_rtsp_skip_packet(AVFormatContext *s)
1157 {
1158 RTSPState *rt = s->priv_data;
1159 int ret, len, len1;
1160 uint8_t buf[MAX_URL_SIZE];
1161
1162 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1163 if (ret != 3)
1164 return ret < 0 ? ret : AVERROR(EIO);
1165 len = AV_RB16(buf + 1);
1166
1167 av_log(s, AV_LOG_TRACE, "skipping RTP packet len=%d\n", len);
1168
1169 /* skip payload */
1170 while (len > 0) {
1171 len1 = len;
1172 if (len1 > sizeof(buf))
1173 len1 = sizeof(buf);
1174 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1175 if (ret != len1)
1176 return ret < 0 ? ret : AVERROR(EIO);
1177 len -= len1;
1178 }
1179
1180 return 0;
1181 }
1182
1183 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
1184 unsigned char **content_ptr,
1185 int return_on_interleaved_data, const char *method)
1186 {
1187 RTSPState *rt = s->priv_data;
1188 char buf[MAX_URL_SIZE], buf1[MAX_URL_SIZE], *q;
1189 unsigned char ch;
1190 const char *p;
1191 int ret, content_length, line_count, request;
1192 unsigned char *content;
1193
1194 start:
1195 line_count = 0;
1196 request = 0;
1197 content = NULL;
1198 memset(reply, 0, sizeof(*reply));
1199
1200 /* parse reply (XXX: use buffers) */
1201 rt->last_reply[0] = '\0';
1202 for (;;) {
1203 q = buf;
1204 for (;;) {
1205 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1206 av_log(s, AV_LOG_TRACE, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1207 if (ret != 1)
1208 return ret < 0 ? ret : AVERROR(EIO);
1209 if (ch == '\n')
1210 break;
1211 if (ch == '$' && q == buf) {
1212 if (return_on_interleaved_data) {
1213 return 1;
1214 } else {
1215 ret = ff_rtsp_skip_packet(s);
1216 if (ret < 0)
1217 return ret;
1218 }
1219 } else if (ch != '\r') {
1220 if ((q - buf) < sizeof(buf) - 1)
1221 *q++ = ch;
1222 }
1223 }
1224 *q = '\0';
1225
1226 av_log(s, AV_LOG_TRACE, "line='%s'\n", buf);
1227
1228 /* test if last line */
1229 if (buf[0] == '\0')
1230 break;
1231 p = buf;
1232 if (line_count == 0) {
1233 /* get reply code */
1234 get_word(buf1, sizeof(buf1), &p);
1235 if (!strncmp(buf1, "RTSP/", 5)) {
1236 get_word(buf1, sizeof(buf1), &p);
1237 reply->status_code = atoi(buf1);
1238 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1239 } else {
1240 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1241 get_word(buf1, sizeof(buf1), &p); // object
1242 request = 1;
1243 }
1244 } else {
1245 ff_rtsp_parse_line(s, reply, p, rt, method);
1246 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1247 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1248 }
1249 line_count++;
1250 }
1251
1252 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1253 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1254
1255 content_length = reply->content_length;
1256 if (content_length > 0) {
1257 /* leave some room for a trailing '\0' (useful for simple parsing) */
1258 content = av_malloc(content_length + 1);
1259 if (!content)
1260 return AVERROR(ENOMEM);
1261 if ((ret = ffurl_read_complete(rt->rtsp_hd, content, content_length)) != content_length) {
1262 av_freep(&content);
1263 return ret < 0 ? ret : AVERROR(EIO);
1264 }
1265 content[content_length] = '\0';
1266 }
1267 if (content_ptr)
1268 *content_ptr = content;
1269 else
1270 av_freep(&content);
1271
1272 if (request) {
1273 char buf[MAX_URL_SIZE];
1274 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1275 const char* ptr = buf;
1276
1277 if (!strcmp(reply->reason, "OPTIONS") ||
1278 !strcmp(reply->reason, "GET_PARAMETER")) {
1279 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1280 if (reply->seq)
1281 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1282 if (reply->session_id[0])
1283 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1284 reply->session_id);
1285 } else {
1286 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1287 }
1288 av_strlcat(buf, "\r\n", sizeof(buf));
1289
1290 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1291 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1292 ptr = base64buf;
1293 }
1294 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1295
1296 rt->last_cmd_time = av_gettime_relative();
1297 /* Even if the request from the server had data, it is not the data
1298 * that the caller wants or expects. The memory could also be leaked
1299 * if the actual following reply has content data. */
1300 if (content_ptr)
1301 av_freep(content_ptr);
1302 /* If method is set, this is called from ff_rtsp_send_cmd,
1303 * where a reply to exactly this request is awaited. For
1304 * callers from within packet receiving, we just want to
1305 * return to the caller and go back to receiving packets. */
1306 if (method)
1307 goto start;
1308 return 0;
1309 }
1310
1311 if (rt->seq != reply->seq) {
1312 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1313 rt->seq, reply->seq);
1314 }
1315
1316 /* EOS */
1317 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1318 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1319 reply->notice == 2306 /* Continuous Feed Terminated */) {
1320 rt->state = RTSP_STATE_IDLE;
1321 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1322 return AVERROR(EIO); /* data or server error */
1323 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1324 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1325 return AVERROR(EPERM);
1326
1327 return 0;
1328 }
1329
1330 /**
1331 * Send a command to the RTSP server without waiting for the reply.
1332 *
1333 * @param s RTSP (de)muxer context
1334 * @param method the method for the request
1335 * @param url the target url for the request
1336 * @param headers extra header lines to include in the request
1337 * @param send_content if non-null, the data to send as request body content
1338 * @param send_content_length the length of the send_content data, or 0 if
1339 * send_content is null
1340 *
1341 * @return zero if success, nonzero otherwise
1342 */
1343 static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
1344 const char *method, const char *url,
1345 const char *headers,
1346 const unsigned char *send_content,
1347 int send_content_length)
1348 {
1349 RTSPState *rt = s->priv_data;
1350 char buf[MAX_URL_SIZE], *out_buf;
1351 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1352
1353 if (!rt->rtsp_hd_out)
1354 return AVERROR(ENOTCONN);
1355
1356 /* Add in RTSP headers */
1357 out_buf = buf;
1358 rt->seq++;
1359 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1360 if (headers)
1361 av_strlcat(buf, headers, sizeof(buf));
1362 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1363 av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", rt->user_agent);
1364 if (rt->session_id[0] != '\0' && (!headers ||
1365 !strstr(headers, "\nIf-Match:"))) {
1366 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1367 }
1368 if (rt->auth[0]) {
1369 char *str = ff_http_auth_create_response(&rt->auth_state,
1370 rt->auth, url, method);
1371 if (str)
1372 av_strlcat(buf, str, sizeof(buf));
1373 av_free(str);
1374 }
1375 if (send_content_length > 0 && send_content)
1376 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1377 av_strlcat(buf, "\r\n", sizeof(buf));
1378
1379 /* base64 encode rtsp if tunneling */
1380 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1381 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1382 out_buf = base64buf;
1383 }
1384
1385 av_log(s, AV_LOG_TRACE, "Sending:\n%s--\n", buf);
1386
1387 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1388 if (send_content_length > 0 && send_content) {
1389 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1390 avpriv_report_missing_feature(s, "Tunneling of RTSP requests with content data");
1391 return AVERROR_PATCHWELCOME;
1392 }
1393 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1394 }
1395 rt->last_cmd_time = av_gettime_relative();
1396
1397 return 0;
1398 }
1399
1400 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1401 const char *url, const char *headers)
1402 {
1403 return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1404 }
1405
1406 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1407 const char *headers, RTSPMessageHeader *reply,
1408 unsigned char **content_ptr)
1409 {
1410 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1411 content_ptr, NULL, 0);
1412 }
1413
1414 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1415 const char *method, const char *url,
1416 const char *header,
1417 RTSPMessageHeader *reply,
1418 unsigned char **content_ptr,
1419 const unsigned char *send_content,
1420 int send_content_length)
1421 {
1422 RTSPState *rt = s->priv_data;
1423 HTTPAuthType cur_auth_type;
1424 int ret, attempts = 0;
1425
1426 retry:
1427 cur_auth_type = rt->auth_state.auth_type;
1428 if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
1429 send_content,
1430 send_content_length)))
1431 return ret;
1432
1433 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1434 return ret;
1435 attempts++;
1436
1437 if (reply->status_code == 401 &&
1438 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1439 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1440 goto retry;
1441
1442 if (reply->status_code > 400){
1443 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1444 method,
1445 reply->status_code,
1446 reply->reason);
1447 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1448 }
1449
1450 return 0;
1451 }
1452
1453 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1454 int lower_transport, const char *real_challenge)
1455 {
1456 RTSPState *rt = s->priv_data;
1457 int rtx = 0, j, i, err, interleave = 0, port_off = 0;
1458 RTSPStream *rtsp_st;
1459 RTSPMessageHeader reply1, *reply = &reply1;
1460 char cmd[MAX_URL_SIZE];
1461 const char *trans_pref;
1462
1463 if (rt->transport == RTSP_TRANSPORT_RDT)
1464 trans_pref = "x-pn-tng";
1465 else if (rt->transport == RTSP_TRANSPORT_RAW)
1466 trans_pref = "RAW/RAW";
1467 else
1468 trans_pref = "RTP/AVP";
1469
1470 /* default timeout: 1 minute */
1471 rt->timeout = 60;
1472
1473 /* Choose a random starting offset within the first half of the
1474 * port range, to allow for a number of ports to try even if the offset
1475 * happens to be at the end of the random range. */
1476 if (rt->rtp_port_max - rt->rtp_port_min >= 4) {
1477 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1478 /* even random offset */
1479 port_off -= port_off & 0x01;
1480 }
1481
1482 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1483 char transport[MAX_URL_SIZE];
1484
1485 /*
1486 * WMS serves all UDP data over a single connection, the RTX, which
1487 * isn't necessarily the first in the SDP but has to be the first
1488 * to be set up, else the second/third SETUP will fail with a 461.
1489 */
1490 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1491 rt->server_type == RTSP_SERVER_WMS) {
1492 if (i == 0) {
1493 /* rtx first */
1494 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1495 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1496 if (len >= 4 &&
1497 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1498 "/rtx"))
1499 break;
1500 }
1501 if (rtx == rt->nb_rtsp_streams)
1502 return -1; /* no RTX found */
1503 rtsp_st = rt->rtsp_streams[rtx];
1504 } else
1505 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1506 } else
1507 rtsp_st = rt->rtsp_streams[i];
1508
1509 /* RTP/UDP */
1510 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1511 char buf[256];
1512
1513 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1514 port = reply->transports[0].client_port_min;
1515 goto have_port;
1516 }
1517
1518 /* first try in specified port range */
1519 while (j + 1 <= rt->rtp_port_max) {
1520 AVDictionary *opts = map_to_opts(rt);
1521
1522 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1523 "?localport=%d", j);
1524 /* we will use two ports per rtp stream (rtp and rtcp) */
1525 j += 2;
1526 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1527 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1528
1529 av_dict_free(&opts);
1530
1531 if (!err)
1532 goto rtp_opened;
1533 }
1534 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1535 err = AVERROR(EIO);
1536 goto fail;
1537
1538 rtp_opened:
1539 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1540 have_port:
1541 av_strlcpy(transport, trans_pref, sizeof(transport));
1542 av_strlcat(transport,
1543 rt->server_type == RTSP_SERVER_SATIP ? ";" : "/UDP;",
1544 sizeof(transport));
1545 if (rt->server_type != RTSP_SERVER_REAL)
1546 av_strlcat(transport, "unicast;", sizeof(transport));
1547 av_strlcatf(transport, sizeof(transport),
1548 "client_port=%d", port);
1549 if (rt->transport == RTSP_TRANSPORT_RTP &&
1550 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1551 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1552 }
1553
1554 /* RTP/TCP */
1555 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1556 /* For WMS streams, the application streams are only used for
1557 * UDP. When trying to set it up for TCP streams, the server
1558 * will return an error. Therefore, we skip those streams. */
1559 if (rt->server_type == RTSP_SERVER_WMS &&
1560 (rtsp_st->stream_index < 0 ||
1561 s->streams[rtsp_st->stream_index]->codecpar->codec_type ==
1562 AVMEDIA_TYPE_DATA))
1563 continue;
1564 snprintf(transport, sizeof(transport) - 1,
1565 "%s/TCP;", trans_pref);
1566 if (rt->transport != RTSP_TRANSPORT_RDT)
1567 av_strlcat(transport, "unicast;", sizeof(transport));
1568 av_strlcatf(transport, sizeof(transport),
1569 "interleaved=%d-%d",
1570 interleave, interleave + 1);
1571 interleave += 2;
1572 }
1573
1574 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1575 snprintf(transport, sizeof(transport) - 1,
1576 "%s/UDP;multicast", trans_pref);
1577 }
1578 if (s->oformat) {
1579 av_strlcat(transport, ";mode=record", sizeof(transport));
1580 } else if (rt->server_type == RTSP_SERVER_REAL ||
1581 rt->server_type == RTSP_SERVER_WMS)
1582 av_strlcat(transport, ";mode=play", sizeof(transport));
1583 snprintf(cmd, sizeof(cmd),
1584 "Transport: %s\r\n",
1585 transport);
1586 if (rt->accept_dynamic_rate)
1587 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1588 if (CONFIG_RTPDEC && i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1589 char real_res[41], real_csum[9];
1590 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1591 real_challenge);
1592 av_strlcatf(cmd, sizeof(cmd),
1593 "If-Match: %s\r\n"
1594 "RealChallenge2: %s, sd=%s\r\n",
1595 rt->session_id, real_res, real_csum);
1596 }
1597 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1598 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1599 err = 1;
1600 goto fail;
1601 } else if (reply->status_code != RTSP_STATUS_OK ||
1602 reply->nb_transports != 1) {
1603 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
1604 goto fail;
1605 }
1606
1607 if (rt->server_type == RTSP_SERVER_SATIP && reply->stream_id[0]) {
1608 char proto[128], host[128], path[512], auth[128];
1609 int port;
1610 av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host),
1611 &port, path, sizeof(path), rt->control_uri);
1612 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host,
1613 port, "/stream=%s", reply->stream_id);
1614 }
1615
1616 /* XXX: same protocol for all streams is required */
1617 if (i > 0) {
1618 if (reply->transports[0].lower_transport != rt->lower_transport ||
1619 reply->transports[0].transport != rt->transport) {
1620 err = AVERROR_INVALIDDATA;
1621 goto fail;
1622 }
1623 } else {
1624 rt->lower_transport = reply->transports[0].lower_transport;
1625 rt->transport = reply->transports[0].transport;
1626 }
1627
1628 /* Fail if the server responded with another lower transport mode
1629 * than what we requested. */
1630 if (reply->transports[0].lower_transport != lower_transport) {
1631 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1632 err = AVERROR_INVALIDDATA;
1633 goto fail;
1634 }
1635
1636 switch(reply->transports[0].lower_transport) {
1637 case RTSP_LOWER_TRANSPORT_TCP:
1638 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1639 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1640 break;
1641
1642 case RTSP_LOWER_TRANSPORT_UDP: {
1643 char url[MAX_URL_SIZE], options[30] = "";
1644 const char *peer = host;
1645
1646 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1647 av_strlcpy(options, "?connect=1", sizeof(options));
1648 /* Use source address if specified */
1649 if (reply->transports[0].source[0])
1650 peer = reply->transports[0].source;
1651 ff_url_join(url, sizeof(url), "rtp", NULL, peer,
1652 reply->transports[0].server_port_min, "%s", options);
1653 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1654 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1655 err = AVERROR_INVALIDDATA;
1656 goto fail;
1657 }
1658 break;
1659 }
1660 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1661 char url[MAX_URL_SIZE], namebuf[50], optbuf[20] = "";
1662 struct sockaddr_storage addr;
1663 int port, ttl;
1664 AVDictionary *opts = map_to_opts(rt);
1665
1666 if (reply->transports[0].destination.ss_family) {
1667 addr = reply->transports[0].destination;
1668 port = reply->transports[0].port_min;
1669 ttl = reply->transports[0].ttl;
1670 } else {
1671 addr = rtsp_st->sdp_ip;
1672 port = rtsp_st->sdp_port;
1673 ttl = rtsp_st->sdp_ttl;
1674 }
1675 if (ttl > 0)
1676 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1677 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1678 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1679 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1680 port, "%s", optbuf);
1681 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1682 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1683 av_dict_free(&opts);
1684
1685 if (err < 0) {
1686 err = AVERROR_INVALIDDATA;
1687 goto fail;
1688 }
1689 break;
1690 }
1691 }
1692
1693 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1694 goto fail;
1695 }
1696
1697 if (rt->nb_rtsp_streams && reply->timeout > 0)
1698 rt->timeout = reply->timeout;
1699
1700 if (rt->server_type == RTSP_SERVER_REAL)
1701 rt->need_subscription = 1;
1702
1703 return 0;
1704
1705 fail:
1706 ff_rtsp_undo_setup(s, 0);
1707 return err;
1708 }
1709
1710 void ff_rtsp_close_connections(AVFormatContext *s)
1711 {
1712 RTSPState *rt = s->priv_data;
1713 if (rt->rtsp_hd_out != rt->rtsp_hd)
1714 ffurl_closep(&rt->rtsp_hd_out);
1715 rt->rtsp_hd_out = NULL;
1716 ffurl_closep(&rt->rtsp_hd);
1717 }
1718
1719 int ff_rtsp_connect(AVFormatContext *s)
1720 {
1721 RTSPState *rt = s->priv_data;
1722 char proto[128], host[1024], path[1024];
1723 char tcpname[1024], cmd[MAX_URL_SIZE], auth[128];
1724 const char *lower_rtsp_proto = "tcp";
1725 int port, err, tcp_fd;
1726 RTSPMessageHeader reply1, *reply = &reply1;
1727 int lower_transport_mask = 0;
1728 int default_port = RTSP_DEFAULT_PORT;
1729 int https_tunnel = 0;
1730 char real_challenge[64] = "";
1731 struct sockaddr_storage peer;
1732 socklen_t peer_len = sizeof(peer);
1733
1734 if (rt->rtp_port_max < rt->rtp_port_min) {
1735 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1736 "than min port %d\n", rt->rtp_port_max,
1737 rt->rtp_port_min);
1738 return AVERROR(EINVAL);
1739 }
1740
1741 if (!ff_network_init())
1742 return AVERROR(EIO);
1743
1744 if (s->max_delay < 0) /* Not set by the caller */
1745 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1746
1747 rt->control_transport = RTSP_MODE_PLAIN;
1748 if (rt->lower_transport_mask & ((1 << RTSP_LOWER_TRANSPORT_HTTP) |
1749 (1 << RTSP_LOWER_TRANSPORT_HTTPS))) {
1750 https_tunnel = !!(rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTPS));
1751 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1752 rt->control_transport = RTSP_MODE_TUNNEL;
1753 }
1754 /* Only pass through valid flags from here */
1755 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1756
1757 redirect:
1758 memset(&reply1, 0, sizeof(reply1));
1759 /* extract hostname and port */
1760 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
1761 host, sizeof(host), &port, path, sizeof(path), s->url);
1762
1763 if (!strcmp(proto, "rtsps")) {
1764 lower_rtsp_proto = "tls";
1765 default_port = RTSPS_DEFAULT_PORT;
1766 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1767 } else if (!strcmp(proto, "satip")) {
1768 av_strlcpy(proto, "rtsp", sizeof(proto));
1769 rt->server_type = RTSP_SERVER_SATIP;
1770 }
1771
1772 if (*auth) {
1773 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1774 }
1775 if (port < 0)
1776 port = default_port;
1777
1778 lower_transport_mask = rt->lower_transport_mask;
1779
1780 if (!lower_transport_mask)
1781 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1782
1783 if (s->oformat) {
1784 /* Only UDP or TCP - UDP multicast isn't supported. */
1785 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1786 (1 << RTSP_LOWER_TRANSPORT_TCP);
1787 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1788 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1789 "only UDP and TCP are supported for output.\n");
1790 err = AVERROR(EINVAL);
1791 goto fail;
1792 }
1793 }
1794
1795 /* Construct the URI used in request; this is similar to s->url,
1796 * but with authentication credentials removed and RTSP specific options
1797 * stripped out. */
1798 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
1799 host, port, "%s", path);
1800
1801 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1802 /* set up initial handshake for tunneling */
1803 char httpname[1024];
1804 char sessioncookie[17];
1805 char headers[1024];
1806 AVDictionary *options = NULL;
1807
1808 av_dict_set_int(&options, "timeout", rt->stimeout, 0);
1809
1810 ff_url_join(httpname, sizeof(httpname), https_tunnel ? "https" : "http", auth, host, port, "%s", path);
1811 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1812 av_get_random_seed(), av_get_random_seed());
1813
1814 /* GET requests */
1815 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1816 &s->interrupt_callback) < 0) {
1817 err = AVERROR(EIO);
1818 goto fail;
1819 }
1820
1821 /* generate GET headers */
1822 snprintf(headers, sizeof(headers),
1823 "x-sessioncookie: %s\r\n"
1824 "Accept: application/x-rtsp-tunnelled\r\n"
1825 "Pragma: no-cache\r\n"
1826 "Cache-Control: no-cache\r\n",
1827 sessioncookie);
1828 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1829
1830 if (!rt->rtsp_hd->protocol_whitelist && s->protocol_whitelist) {
1831 rt->rtsp_hd->protocol_whitelist = av_strdup(s->protocol_whitelist);
1832 if (!rt->rtsp_hd->protocol_whitelist) {
1833 err = AVERROR(ENOMEM);
1834 goto fail;
1835 }
1836 }
1837
1838 /* complete the connection */
1839 if (ffurl_connect(rt->rtsp_hd, &options)) {
1840 av_dict_free(&options);
1841 err = AVERROR(EIO);
1842 goto fail;
1843 }
1844
1845 /* POST requests */
1846 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1847 &s->interrupt_callback) < 0 ) {
1848 err = AVERROR(EIO);
1849 goto fail;
1850 }
1851
1852 /* generate POST headers */
1853 snprintf(headers, sizeof(headers),
1854 "x-sessioncookie: %s\r\n"
1855 "Content-Type: application/x-rtsp-tunnelled\r\n"
1856 "Pragma: no-cache\r\n"
1857 "Cache-Control: no-cache\r\n"
1858 "Content-Length: 32767\r\n"
1859 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1860 sessioncookie);
1861 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1862 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1863 av_opt_set(rt->rtsp_hd_out->priv_data, "send_expect_100", "0", 0);
1864
1865 /* Initialize the authentication state for the POST session. The HTTP
1866 * protocol implementation doesn't properly handle multi-pass
1867 * authentication for POST requests, since it would require one of
1868 * the following:
1869 * - implementing Expect: 100-continue, which many HTTP servers
1870 * don't support anyway, even less the RTSP servers that do HTTP
1871 * tunneling
1872 * - sending the whole POST data until getting a 401 reply specifying
1873 * what authentication method to use, then resending all that data
1874 * - waiting for potential 401 replies directly after sending the
1875 * POST header (waiting for some unspecified time)
1876 * Therefore, we copy the full auth state, which works for both basic
1877 * and digest. (For digest, we would have to synchronize the nonce
1878 * count variable between the two sessions, if we'd do more requests
1879 * with the original session, though.)
1880 */
1881 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1882
1883 /* complete the connection */
1884 if (ffurl_connect(rt->rtsp_hd_out, &options)) {
1885 av_dict_free(&options);
1886 err = AVERROR(EIO);
1887 goto fail;
1888 }
1889 av_dict_free(&options);
1890 } else {
1891 int ret;
1892 /* open the tcp connection */
1893 ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
1894 host, port,
1895 "?timeout=%"PRId64, rt->stimeout);
1896 if ((ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1897 &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL)) < 0) {
1898 err = ret;
1899 goto fail;
1900 }
1901 rt->rtsp_hd_out = rt->rtsp_hd;
1902 }
1903 rt->seq = 0;
1904
1905 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1906 if (tcp_fd < 0) {
1907 err = tcp_fd;
1908 goto fail;
1909 }
1910 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1911 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1912 NULL, 0, NI_NUMERICHOST);
1913 }
1914
1915 /* request options supported by the server; this also detects server
1916 * type */
1917 if (rt->server_type != RTSP_SERVER_SATIP)
1918 rt->server_type = RTSP_SERVER_RTP;
1919 for (;;) {
1920 cmd[0] = 0;
1921 if (rt->server_type == RTSP_SERVER_REAL)
1922 av_strlcat(cmd,
1923 /*
1924 * The following entries are required for proper
1925 * streaming from a Realmedia server. They are
1926 * interdependent in some way although we currently
1927 * don't quite understand how. Values were copied
1928 * from mplayer SVN r23589.
1929 * ClientChallenge is a 16-byte ID in hex
1930 * CompanyID is a 16-byte ID in base64
1931 */
1932 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1933 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1934 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1935 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1936 sizeof(cmd));
1937 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1938 if (reply->status_code != RTSP_STATUS_OK) {
1939 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
1940 goto fail;
1941 }
1942
1943 /* detect server type if not standard-compliant RTP */
1944 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1945 rt->server_type = RTSP_SERVER_REAL;
1946 continue;
1947 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1948 rt->server_type = RTSP_SERVER_WMS;
1949 } else if (rt->server_type == RTSP_SERVER_REAL)
1950 strcpy(real_challenge, reply->real_challenge);
1951 break;
1952 }
1953
1954 #if CONFIG_RTSP_DEMUXER
1955 if (s->iformat) {
1956 if (rt->server_type == RTSP_SERVER_SATIP)
1957 err = init_satip_stream(s);
1958 else
1959 err = ff_rtsp_setup_input_streams(s, reply);
1960 } else
1961 #endif
1962 if (CONFIG_RTSP_MUXER)
1963 err = ff_rtsp_setup_output_streams(s, host);
1964 else
1965 av_assert0(0);
1966 if (err)
1967 goto fail;
1968
1969 do {
1970 int lower_transport = ff_log2_tab[lower_transport_mask &
1971 ~(lower_transport_mask - 1)];
1972
1973 if ((lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP))
1974 && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP))
1975 lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1976
1977 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1978 rt->server_type == RTSP_SERVER_REAL ?
1979 real_challenge : NULL);
1980 if (err < 0)
1981 goto fail;
1982 lower_transport_mask &= ~(1 << lower_transport);
1983 if (lower_transport_mask == 0 && err == 1) {
1984 err = AVERROR(EPROTONOSUPPORT);
1985 goto fail;
1986 }
1987 } while (err);
1988
1989 rt->lower_transport_mask = lower_transport_mask;
1990 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1991 rt->state = RTSP_STATE_IDLE;
1992 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1993 return 0;
1994 fail:
1995 ff_rtsp_close_streams(s);
1996 ff_rtsp_close_connections(s);
1997 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1998 char *new_url = av_strdup(reply->location);
1999 if (!new_url) {
2000 err = AVERROR(ENOMEM);
2001 goto fail2;
2002 }
2003 ff_format_set_url(s, new_url);
2004 rt->session_id[0] = '\0';
2005 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
2006 reply->status_code,
2007 s->url);
2008 goto redirect;
2009 }
2010 fail2:
2011 ff_network_close();
2012 return err;
2013 }
2014 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
2015
2016 #if CONFIG_RTPDEC
2017 #if CONFIG_RTSP_DEMUXER
2018 static int parse_rtsp_message(AVFormatContext *s)
2019 {
2020 RTSPState *rt = s->priv_data;
2021 int ret;
2022
2023 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
2024 if (rt->state == RTSP_STATE_STREAMING) {
2025 return ff_rtsp_parse_streaming_commands(s);
2026 } else
2027 return AVERROR_EOF;
2028 } else {
2029 RTSPMessageHeader reply;
2030 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
2031 if (ret < 0)
2032 return ret;
2033 /* XXX: parse message */
2034 if (rt->state != RTSP_STATE_STREAMING)
2035 return 0;
2036 }
2037
2038 return 0;
2039 }
2040 #endif
2041
2042 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
2043 uint8_t *buf, int buf_size, int64_t wait_end)
2044 {
2045 RTSPState *rt = s->priv_data;
2046 RTSPStream *rtsp_st;
2047 int n, i, ret;
2048 struct pollfd *p = rt->p;
2049 int *fds = NULL, fdsnum, fdsidx;
2050 int64_t runs = rt->stimeout / POLLING_TIME / 1000;
2051
2052 if (!p) {
2053 p = rt->p = av_malloc_array(2 * rt->nb_rtsp_streams + 1, sizeof(*p));
2054 if (!p)
2055 return AVERROR(ENOMEM);
2056
2057 if (rt->rtsp_hd) {
2058 p[rt->max_p].fd = ffurl_get_file_handle(rt->rtsp_hd);
2059 p[rt->max_p++].events = POLLIN;
2060 }
2061 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2062 rtsp_st = rt->rtsp_streams[i];
2063 if (rtsp_st->rtp_handle) {
2064 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
2065 &fds, &fdsnum)) {
2066 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
2067 return ret;
2068 }
2069 if (fdsnum != 2) {
2070 av_log(s, AV_LOG_ERROR,
2071 "Number of fds %d not supported\n", fdsnum);
2072 return AVERROR_INVALIDDATA;
2073 }
2074 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
2075 p[rt->max_p].fd = fds[fdsidx];
2076 p[rt->max_p++].events = POLLIN;
2077 }
2078 av_freep(&fds);
2079 }
2080 }
2081 }
2082
2083 for (;;) {
2084 if (ff_check_interrupt(&s->interrupt_callback))
2085 return AVERROR_EXIT;
2086 if (wait_end && wait_end - av_gettime_relative() < 0)
2087 return AVERROR(EAGAIN);
2088 n = poll(p, rt->max_p, POLLING_TIME);
2089 if (n > 0) {
2090 int j = rt->rtsp_hd ? 1 : 0;
2091 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2092 rtsp_st = rt->rtsp_streams[i];
2093 if (rtsp_st->rtp_handle) {
2094 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
2095 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
2096 if (ret > 0) {
2097 *prtsp_st = rtsp_st;
2098 return ret;
2099 }
2100 }
2101 j+=2;
2102 }
2103 }
2104 #if CONFIG_RTSP_DEMUXER
2105 if (rt->rtsp_hd && p[0].revents & POLLIN) {
2106 if ((ret = parse_rtsp_message(s)) < 0) {
2107 return ret;
2108 }
2109 }
2110 #endif
2111 } else if (n == 0 && rt->stimeout > 0 && --runs <= 0) {
2112 return AVERROR(ETIMEDOUT);
2113 } else if (n < 0 && errno != EINTR)
2114 return AVERROR(errno);
2115 }
2116 }
2117
2118 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
2119 const uint8_t *buf, int len)
2120 {
2121 RTSPState *rt = s->priv_data;
2122 int i;
2123 if (len < 0)
2124 return len;
2125 if (rt->nb_rtsp_streams == 1) {
2126 *rtsp_st = rt->rtsp_streams[0];
2127 return len;
2128 }
2129 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
2130 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
2131 int no_ssrc = 0;
2132 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2133 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2134 if (!rtpctx)
2135 continue;
2136 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
2137 *rtsp_st = rt->rtsp_streams[i];
2138 return len;
2139 }
2140 if (!rtpctx->ssrc)
2141 no_ssrc = 1;
2142 }
2143 if (no_ssrc) {
2144 av_log(s, AV_LOG_WARNING,
2145 "Unable to pick stream for packet - SSRC not known for "
2146 "all streams\n");
2147 return AVERROR(EAGAIN);
2148 }
2149 } else {
2150 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2151 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
2152 *rtsp_st = rt->rtsp_streams[i];
2153 return len;
2154 }
2155 }
2156 }
2157 }
2158 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
2159 return AVERROR(EAGAIN);
2160 }
2161
2162 static int read_packet(AVFormatContext *s,
2163 RTSPStream **rtsp_st, RTSPStream *first_queue_st,
2164 int64_t wait_end)
2165 {
2166 RTSPState *rt = s->priv_data;
2167 int len;
2168
2169 switch(rt->lower_transport) {
2170 default:
2171 #if CONFIG_RTSP_DEMUXER
2172 case RTSP_LOWER_TRANSPORT_TCP:
2173 len = ff_rtsp_tcp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2174 break;
2175 #endif
2176 case RTSP_LOWER_TRANSPORT_UDP:
2177 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
2178 len = udp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2179 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2180 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, (*rtsp_st)->rtp_handle, NULL, len);
2181 break;
2182 case RTSP_LOWER_TRANSPORT_CUSTOM:
2183 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
2184 wait_end && wait_end < av_gettime_relative())
2185 len = AVERROR(EAGAIN);
2186 else
2187 len = avio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2188 len = pick_stream(s, rtsp_st, rt->recvbuf, len);
2189 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2190 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, NULL, s->pb, len);
2191 break;
2192 }
2193
2194 if (len == 0)
2195 return AVERROR_EOF;
2196
2197 return len;
2198 }
2199
2200 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
2201 {
2202 RTSPState *rt = s->priv_data;
2203 int ret, len;
2204 RTSPStream *rtsp_st, *first_queue_st = NULL;
2205 int64_t wait_end = 0;
2206
2207 if (rt->nb_byes == rt->nb_rtsp_streams)
2208 return AVERROR_EOF;
2209
2210 /* get next frames from the same RTP packet */
2211 if (rt->cur_transport_priv) {
2212 if (rt->transport == RTSP_TRANSPORT_RDT) {
2213 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2214 } else if (rt->transport == RTSP_TRANSPORT_RTP)