FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/rtsp.c
Date: 2025-07-28 20:30:09
Exec Total Coverage
Lines: 14 1548 0.9%
Functions: 2 44 4.5%
Branches: 15 1158 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/mem.h"
31 #include "libavutil/parseutils.h"
32 #include "libavutil/random_seed.h"
33 #include "libavutil/dict.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/time.h"
36 #include "libavcodec/codec_desc.h"
37 #include "avformat.h"
38 #include "avio_internal.h"
39 #include "demux.h"
40
41 #if HAVE_POLL_H
42 #include <poll.h>
43 #endif
44 #include "internal.h"
45 #include "network.h"
46 #include "os_support.h"
47 #include "http.h"
48 #include "rtsp.h"
49
50 #include "rtpdec.h"
51 #include "rtpproto.h"
52 #include "rdt.h"
53 #include "rtpdec_formats.h"
54 #include "rtpenc_chain.h"
55 #include "url.h"
56 #include "tls.h"
57 #include "rtpenc.h"
58 #include "mpegts.h"
59 #include "version.h"
60
61 /* Default timeout values for read packet in seconds */
62 #define READ_PACKET_TIMEOUT_S 10
63 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
64 #define DEFAULT_REORDERING_DELAY 100000
65
66 #define OFFSET(x) offsetof(RTSPState, x)
67 #define DEC AV_OPT_FLAG_DECODING_PARAM
68 #define ENC AV_OPT_FLAG_ENCODING_PARAM
69
70 #define RTSP_FLAG_OPTS(name, longname) \
71 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, .unit = "rtsp_flags" }, \
72 { "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" }
73
74 #define RTSP_MEDIATYPE_OPTS(name, longname) \
75 { 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" }, \
76 { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, .unit = "allowed_media_types" }, \
77 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, .unit = "allowed_media_types" }, \
78 { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, .unit = "allowed_media_types" }, \
79 { "subtitle", "Subtitle", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_SUBTITLE}, 0, 0, DEC, .unit = "allowed_media_types" }
80
81 #define COMMON_OPTS() \
82 { "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 }, \
83 { "buffer_size", "Underlying protocol send/receive buffer size", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC|ENC }, \
84 { "pkt_size", "Underlying protocol send packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, ENC } \
85
86
87 const AVOption ff_rtsp_options[] = {
88 { "initial_pause", "do not start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
89 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
90 { "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" }, \
91 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, .unit = "rtsp_transport" }, \
92 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, .unit = "rtsp_transport" }, \
93 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, .unit = "rtsp_transport" },
94 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, .unit = "rtsp_transport" },
95 { "https", "HTTPS tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTPS )}, 0, 0, DEC, .unit = "rtsp_transport" },
96 RTSP_FLAG_OPTS("rtsp_flags", "set RTSP flags"),
97 { "listen", "wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, .unit = "rtsp_flags" },
98 { "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" },
99 { "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" },
100 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
101 { "min_port", "set minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
102 { "max_port", "set maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
103 { "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 },
104 { "timeout", "set timeout (in microseconds) of socket I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT64, {.i64 = 0}, INT_MIN, INT64_MAX, DEC },
105 COMMON_OPTS(),
106 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
107
108 // TLS options
109 FF_TLS_CLIENT_OPTIONS(RTSPState, tls_opts),
110 { NULL },
111 };
112
113 static const AVOption sdp_options[] = {
114 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
115 { "custom_io", "use custom I/O", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, .unit = "rtsp_flags" },
116 { "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" },
117 { "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 },
118 { "localaddr", "local address", OFFSET(localaddr),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, \
119 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
120 COMMON_OPTS(),
121 { NULL },
122 };
123
124 static const AVOption rtp_options[] = {
125 RTSP_FLAG_OPTS("rtp_flags", "set RTP flags"),
126 { "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 },
127 { "localaddr", "local address", OFFSET(localaddr),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, \
128 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
129 COMMON_OPTS(),
130 { NULL },
131 };
132
133
134 static AVDictionary *map_to_opts(RTSPState *rt)
135 {
136 AVDictionary *opts = NULL;
137
138 av_dict_set_int(&opts, "buffer_size", rt->buffer_size, 0);
139 av_dict_set_int(&opts, "pkt_size", rt->pkt_size, 0);
140 if (rt->localaddr && rt->localaddr[0])
141 av_dict_set(&opts, "localaddr", rt->localaddr, 0);
142
143 return opts;
144 }
145
146 #define ERR_RET(c) \
147 do { \
148 int ret = c; \
149 if (ret < 0) \
150 return ret; \
151 } while (0)
152
153 /**
154 * Add the TLS options of the given RTSPState to the dict
155 */
156 static int copy_tls_opts_dict(RTSPState *rt, AVDictionary **dict)
157 {
158 ERR_RET(av_dict_set_int(dict, "tls_verify", rt->tls_opts.verify, 0));
159 ERR_RET(av_dict_set(dict, "ca_file", rt->tls_opts.ca_file, 0));
160 ERR_RET(av_dict_set(dict, "cert_file", rt->tls_opts.cert_file, 0));
161 ERR_RET(av_dict_set(dict, "key_file", rt->tls_opts.key_file, 0));
162 ERR_RET(av_dict_set(dict, "verifyhost", rt->tls_opts.host, 0));
163
164 return 0;
165 }
166
167 #undef ERR_RET
168
169 static void get_word_until_chars(char *buf, int buf_size,
170 const char *sep, const char **pp)
171 {
172 const char *p;
173 char *q;
174
175 p = *pp;
176 p += strspn(p, SPACE_CHARS);
177 q = buf;
178 while (!strchr(sep, *p) && *p != '\0') {
179 if ((q - buf) < buf_size - 1)
180 *q++ = *p;
181 p++;
182 }
183 if (buf_size > 0)
184 *q = '\0';
185 *pp = p;
186 }
187
188 static void get_word_sep(char *buf, int buf_size, const char *sep,
189 const char **pp)
190 {
191 if (**pp == '/') (*pp)++;
192 get_word_until_chars(buf, buf_size, sep, pp);
193 }
194
195 static void get_word(char *buf, int buf_size, const char **pp)
196 {
197 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
198 }
199
200 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
201 * and end time.
202 * Used for seeking in the rtp stream.
203 */
204 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
205 {
206 char buf[256];
207
208 p += strspn(p, SPACE_CHARS);
209 if (!av_stristart(p, "npt=", &p))
210 return;
211
212 *start = AV_NOPTS_VALUE;
213 *end = AV_NOPTS_VALUE;
214
215 get_word_sep(buf, sizeof(buf), "-", &p);
216 if (av_parse_time(start, buf, 1) < 0)
217 return;
218 if (*p == '-') {
219 p++;
220 get_word_sep(buf, sizeof(buf), "-", &p);
221 if (av_parse_time(end, buf, 1) < 0)
222 av_log(NULL, AV_LOG_DEBUG, "Failed to parse interval end specification '%s'\n", buf);
223 }
224 }
225
226 static int get_sockaddr(AVFormatContext *s,
227 const char *buf, struct sockaddr_storage *sock)
228 {
229 struct addrinfo hints = { 0 }, *ai = NULL;
230 int ret;
231
232 hints.ai_flags = AI_NUMERICHOST;
233 if ((ret = getaddrinfo(buf, NULL, &hints, &ai))) {
234 av_log(s, AV_LOG_ERROR, "getaddrinfo(%s): %s\n",
235 buf,
236 gai_strerror(ret));
237 return -1;
238 }
239 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
240 freeaddrinfo(ai);
241 return 0;
242 }
243
244 #if CONFIG_RTPDEC
245 static void init_rtp_handler(const RTPDynamicProtocolHandler *handler,
246 RTSPStream *rtsp_st, AVStream *st)
247 {
248 AVCodecParameters *par = st ? st->codecpar : NULL;
249 if (!handler)
250 return;
251 if (par)
252 par->codec_id = handler->codec_id;
253 rtsp_st->dynamic_handler = handler;
254 if (st)
255 ffstream(st)->need_parsing = handler->need_parsing;
256 if (handler->priv_data_size) {
257 rtsp_st->dynamic_protocol_context = av_mallocz(handler->priv_data_size);
258 if (!rtsp_st->dynamic_protocol_context)
259 rtsp_st->dynamic_handler = NULL;
260 }
261 }
262
263 static void finalize_rtp_handler_init(AVFormatContext *s, RTSPStream *rtsp_st,
264 AVStream *st)
265 {
266 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init) {
267 int ret = rtsp_st->dynamic_handler->init(s, st ? st->index : -1,
268 rtsp_st->dynamic_protocol_context);
269 if (ret < 0) {
270 if (rtsp_st->dynamic_protocol_context) {
271 if (rtsp_st->dynamic_handler->close)
272 rtsp_st->dynamic_handler->close(
273 rtsp_st->dynamic_protocol_context);
274 av_free(rtsp_st->dynamic_protocol_context);
275 }
276 rtsp_st->dynamic_protocol_context = NULL;
277 rtsp_st->dynamic_handler = NULL;
278 }
279 }
280 }
281
282 #if CONFIG_RTSP_DEMUXER
283 static int init_satip_stream(AVFormatContext *s)
284 {
285 RTSPState *rt = s->priv_data;
286 RTSPStream *rtsp_st = av_mallocz(sizeof(RTSPStream));
287 if (!rtsp_st)
288 return AVERROR(ENOMEM);
289 dynarray_add(&rt->rtsp_streams,
290 &rt->nb_rtsp_streams, rtsp_st);
291
292 rtsp_st->sdp_payload_type = 33; // MP2T
293 av_strlcpy(rtsp_st->control_url,
294 rt->control_uri, sizeof(rtsp_st->control_url));
295
296 if (rt->rtsp_flags & RTSP_FLAG_SATIP_RAW) {
297 AVStream *st = avformat_new_stream(s, NULL);
298 if (!st)
299 return AVERROR(ENOMEM);
300 st->id = rt->nb_rtsp_streams - 1;
301 rtsp_st->stream_index = st->index;
302 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
303 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
304 } else {
305 rtsp_st->stream_index = -1;
306 init_rtp_handler(&ff_mpegts_dynamic_handler, rtsp_st, NULL);
307 finalize_rtp_handler_init(s, rtsp_st, NULL);
308 }
309 return 0;
310 }
311 #endif
312
313 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
314 static int sdp_parse_rtpmap(AVFormatContext *s,
315 AVStream *st, RTSPStream *rtsp_st,
316 int payload_type, const char *p)
317 {
318 AVCodecParameters *par = st->codecpar;
319 char buf[256];
320 int i;
321 const AVCodecDescriptor *desc;
322 const char *c_name;
323
324 /* See if we can handle this kind of payload.
325 * The space should normally not be there but some Real streams or
326 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
327 * have a trailing space. */
328 get_word_sep(buf, sizeof(buf), "/ ", &p);
329 if (payload_type < RTP_PT_PRIVATE) {
330 /* We are in a standard case
331 * (from http://www.iana.org/assignments/rtp-parameters). */
332 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
333 }
334
335 if (par->codec_id == AV_CODEC_ID_NONE) {
336 const RTPDynamicProtocolHandler *handler =
337 ff_rtp_handler_find_by_name(buf, par->codec_type);
338 init_rtp_handler(handler, rtsp_st, st);
339 /* If no dynamic handler was found, check with the list of standard
340 * allocated types, if such a stream for some reason happens to
341 * use a private payload type. This isn't handled in rtpdec.c, since
342 * the format name from the rtpmap line never is passed into rtpdec. */
343 if (!rtsp_st->dynamic_handler)
344 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
345 }
346
347 desc = avcodec_descriptor_get(par->codec_id);
348 if (desc && desc->name)
349 c_name = desc->name;
350 else
351 c_name = "(null)";
352
353 get_word_sep(buf, sizeof(buf), "/", &p);
354 i = atoi(buf);
355 switch (par->codec_type) {
356 case AVMEDIA_TYPE_AUDIO:
357 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
358 par->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
359 par->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
360 if (i > 0) {
361 par->sample_rate = i;
362 avpriv_set_pts_info(st, 32, 1, par->sample_rate);
363 get_word_sep(buf, sizeof(buf), "/", &p);
364 i = atoi(buf);
365 if (i > 0)
366 av_channel_layout_default(&par->ch_layout, i);
367 }
368 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
369 par->sample_rate);
370 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
371 par->ch_layout.nb_channels);
372 break;
373 case AVMEDIA_TYPE_VIDEO:
374 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
375 if (i > 0)
376 avpriv_set_pts_info(st, 32, 1, i);
377 break;
378 default:
379 break;
380 }
381 finalize_rtp_handler_init(s, rtsp_st, st);
382 return 0;
383 }
384
385 /* parse the attribute line from the fmtp a line of an sdp response. This
386 * is broken out as a function because it is used in rtp_h264.c, which is
387 * forthcoming. */
388 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
389 char *value, int value_size)
390 {
391 *p += strspn(*p, SPACE_CHARS);
392 if (**p) {
393 get_word_sep(attr, attr_size, "=", p);
394 if (**p == '=')
395 (*p)++;
396 get_word_sep(value, value_size, ";", p);
397 if (**p == ';')
398 (*p)++;
399 return 1;
400 }
401 return 0;
402 }
403
404 typedef struct SDPParseState {
405 /* SDP only */
406 struct sockaddr_storage default_ip;
407 int default_ttl;
408 int skip_media; ///< set if an unknown m= line occurs
409 int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
410 struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
411 int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
412 struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
413 int seen_rtpmap;
414 int seen_fmtp;
415 char delayed_fmtp[2048];
416 } SDPParseState;
417
418 static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
419 struct RTSPSource ***dest, int *dest_count)
420 {
421 RTSPSource *rtsp_src, *rtsp_src2;
422 int i;
423 for (i = 0; i < count; i++) {
424 rtsp_src = addrs[i];
425 rtsp_src2 = av_memdup(rtsp_src, sizeof(*rtsp_src));
426 if (!rtsp_src2)
427 continue;
428 dynarray_add(dest, dest_count, rtsp_src2);
429 }
430 }
431
432 static void parse_fmtp(AVFormatContext *s, RTSPState *rt,
433 int payload_type, const char *line)
434 {
435 int i;
436
437 for (i = 0; i < rt->nb_rtsp_streams; i++) {
438 RTSPStream *rtsp_st = rt->rtsp_streams[i];
439 if (rtsp_st->sdp_payload_type == payload_type &&
440 rtsp_st->dynamic_handler &&
441 rtsp_st->dynamic_handler->parse_sdp_a_line) {
442 rtsp_st->dynamic_handler->parse_sdp_a_line(s, rtsp_st->stream_index,
443 rtsp_st->dynamic_protocol_context, line);
444 }
445 }
446 }
447
448 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
449 int letter, const char *buf)
450 {
451 RTSPState *rt = s->priv_data;
452 char buf1[64], st_type[64];
453 const char *p;
454 enum AVMediaType codec_type;
455 int payload_type;
456 AVStream *st;
457 RTSPStream *rtsp_st;
458 RTSPSource *rtsp_src;
459 struct sockaddr_storage sdp_ip;
460 int ttl;
461
462 av_log(s, AV_LOG_TRACE, "sdp: %c='%s'\n", letter, buf);
463
464 p = buf;
465 if (s1->skip_media && letter != 'm')
466 return;
467 switch (letter) {
468 case 'c':
469 get_word(buf1, sizeof(buf1), &p);
470 if (strcmp(buf1, "IN") != 0)
471 return;
472 get_word(buf1, sizeof(buf1), &p);
473 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
474 return;
475 get_word_sep(buf1, sizeof(buf1), "/", &p);
476 if (get_sockaddr(s, buf1, &sdp_ip))
477 return;
478 ttl = 16;
479 if (*p == '/') {
480 p++;
481 get_word_sep(buf1, sizeof(buf1), "/", &p);
482 ttl = atoi(buf1);
483 }
484 if (s->nb_streams == 0) {
485 s1->default_ip = sdp_ip;
486 s1->default_ttl = ttl;
487 } else {
488 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
489 rtsp_st->sdp_ip = sdp_ip;
490 rtsp_st->sdp_ttl = ttl;
491 }
492 break;
493 case 's':
494 av_dict_set(&s->metadata, "title", p, 0);
495 break;
496 case 'i':
497 if (s->nb_streams == 0) {
498 av_dict_set(&s->metadata, "comment", p, 0);
499 break;
500 }
501 break;
502 case 'm':
503 /* new stream */
504 s1->skip_media = 0;
505 s1->seen_fmtp = 0;
506 s1->seen_rtpmap = 0;
507 codec_type = AVMEDIA_TYPE_UNKNOWN;
508 get_word(st_type, sizeof(st_type), &p);
509 if (!strcmp(st_type, "audio")) {
510 codec_type = AVMEDIA_TYPE_AUDIO;
511 } else if (!strcmp(st_type, "video")) {
512 codec_type = AVMEDIA_TYPE_VIDEO;
513 } else if (!strcmp(st_type, "application")) {
514 codec_type = AVMEDIA_TYPE_DATA;
515 } else if (!strcmp(st_type, "text")) {
516 codec_type = AVMEDIA_TYPE_SUBTITLE;
517 }
518 if (codec_type == AVMEDIA_TYPE_UNKNOWN ||
519 !(rt->media_type_mask & (1 << codec_type)) ||
520 rt->nb_rtsp_streams >= s->max_streams
521 ) {
522 s1->skip_media = 1;
523 return;
524 }
525 rtsp_st = av_mallocz(sizeof(RTSPStream));
526 if (!rtsp_st)
527 return;
528 rtsp_st->stream_index = -1;
529 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
530
531 rtsp_st->sdp_ip = s1->default_ip;
532 rtsp_st->sdp_ttl = s1->default_ttl;
533
534 copy_default_source_addrs(s1->default_include_source_addrs,
535 s1->nb_default_include_source_addrs,
536 &rtsp_st->include_source_addrs,
537 &rtsp_st->nb_include_source_addrs);
538 copy_default_source_addrs(s1->default_exclude_source_addrs,
539 s1->nb_default_exclude_source_addrs,
540 &rtsp_st->exclude_source_addrs,
541 &rtsp_st->nb_exclude_source_addrs);
542
543 get_word(buf1, sizeof(buf1), &p); /* port */
544 rtsp_st->sdp_port = atoi(buf1);
545
546 get_word(buf1, sizeof(buf1), &p); /* protocol */
547 if (!strcmp(buf1, "udp"))
548 rt->transport = RTSP_TRANSPORT_RAW;
549 else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
550 rtsp_st->feedback = 1;
551
552 /* XXX: handle list of formats */
553 get_word(buf1, sizeof(buf1), &p); /* format list */
554 rtsp_st->sdp_payload_type = atoi(buf1);
555
556 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
557 /* no corresponding stream */
558 if (rt->transport == RTSP_TRANSPORT_RAW) {
559 if (CONFIG_RTPDEC && !rt->ts)
560 rt->ts = avpriv_mpegts_parse_open(s);
561 } else {
562 const RTPDynamicProtocolHandler *handler;
563 handler = ff_rtp_handler_find_by_id(
564 rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
565 init_rtp_handler(handler, rtsp_st, NULL);
566 finalize_rtp_handler_init(s, rtsp_st, NULL);
567 }
568 } else if (rt->server_type == RTSP_SERVER_WMS &&
569 codec_type == AVMEDIA_TYPE_DATA) {
570 /* RTX stream, a stream that carries all the other actual
571 * audio/video streams. Don't expose this to the callers. */
572 } else {
573 st = avformat_new_stream(s, NULL);
574 if (!st)
575 return;
576 st->id = rt->nb_rtsp_streams - 1;
577 rtsp_st->stream_index = st->index;
578 st->codecpar->codec_type = codec_type;
579 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
580 const RTPDynamicProtocolHandler *handler;
581 /* if standard payload type, we can find the codec right now */
582 ff_rtp_get_codec_info(st->codecpar, rtsp_st->sdp_payload_type);
583 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
584 st->codecpar->sample_rate > 0)
585 avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
586 /* Even static payload types may need a custom depacketizer */
587 handler = ff_rtp_handler_find_by_id(
588 rtsp_st->sdp_payload_type, st->codecpar->codec_type);
589 init_rtp_handler(handler, rtsp_st, st);
590 finalize_rtp_handler_init(s, rtsp_st, st);
591 }
592 if (rt->default_lang[0])
593 av_dict_set(&st->metadata, "language", rt->default_lang, 0);
594 }
595 /* put a default control url */
596 av_strlcpy(rtsp_st->control_url, rt->control_uri,
597 sizeof(rtsp_st->control_url));
598 break;
599 case 'a':
600 if (av_strstart(p, "control:", &p)) {
601 if (rt->nb_rtsp_streams == 0) {
602 if (!strncmp(p, "rtsp://", 7))
603 av_strlcpy(rt->control_uri, p,
604 sizeof(rt->control_uri));
605 } else {
606 char proto[32];
607 /* get the control url */
608 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
609
610 /* XXX: may need to add full url resolution */
611 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
612 NULL, NULL, 0, p);
613 if (proto[0] == '\0') {
614 /* relative control URL */
615 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
616 av_strlcat(rtsp_st->control_url, "/",
617 sizeof(rtsp_st->control_url));
618 av_strlcat(rtsp_st->control_url, p,
619 sizeof(rtsp_st->control_url));
620 } else
621 av_strlcpy(rtsp_st->control_url, p,
622 sizeof(rtsp_st->control_url));
623 }
624 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
625 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
626 get_word(buf1, sizeof(buf1), &p);
627 payload_type = atoi(buf1);
628 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
629 if (rtsp_st->stream_index >= 0) {
630 st = s->streams[rtsp_st->stream_index];
631 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
632 }
633 s1->seen_rtpmap = 1;
634 if (s1->seen_fmtp) {
635 parse_fmtp(s, rt, payload_type, s1->delayed_fmtp);
636 }
637 } else if (av_strstart(p, "fmtp:", &p) ||
638 av_strstart(p, "framesize:", &p)) {
639 // let dynamic protocol handlers have a stab at the line.
640 get_word(buf1, sizeof(buf1), &p);
641 payload_type = atoi(buf1);
642 if (s1->seen_rtpmap) {
643 parse_fmtp(s, rt, payload_type, buf);
644 } else {
645 s1->seen_fmtp = 1;
646 av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp));
647 }
648 } else if (av_strstart(p, "framerate:", &p) && s->nb_streams > 0) {
649 // RFC 8866
650 double framerate;
651 if (av_sscanf(p, "%lf%c", &framerate, &(char){0}) == 1) {
652 st = s->streams[s->nb_streams - 1];
653 st->avg_frame_rate = av_d2q(framerate, INT_MAX);
654 }
655 } else if (av_strstart(p, "ssrc:", &p) && s->nb_streams > 0) {
656 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
657 get_word(buf1, sizeof(buf1), &p);
658 rtsp_st->ssrc = strtoll(buf1, NULL, 10);
659 } else if (av_strstart(p, "range:", &p)) {
660 int64_t start, end;
661
662 // this is so that seeking on a streamed file can work.
663 rtsp_parse_range_npt(p, &start, &end);
664 s->start_time = start;
665 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
666 s->duration = (end == AV_NOPTS_VALUE) ?
667 AV_NOPTS_VALUE : end - start;
668 } else if (av_strstart(p, "lang:", &p)) {
669 if (s->nb_streams > 0) {
670 get_word(buf1, sizeof(buf1), &p);
671 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
672 if (rtsp_st->stream_index >= 0) {
673 st = s->streams[rtsp_st->stream_index];
674 av_dict_set(&st->metadata, "language", buf1, 0);
675 }
676 } else
677 get_word(rt->default_lang, sizeof(rt->default_lang), &p);
678 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
679 if (atoi(p) == 1)
680 rt->transport = RTSP_TRANSPORT_RDT;
681 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
682 s->nb_streams > 0) {
683 st = s->streams[s->nb_streams - 1];
684 st->codecpar->sample_rate = atoi(p);
685 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
686 // RFC 4568
687 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
688 get_word(buf1, sizeof(buf1), &p); // ignore tag
689 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
690 p += strspn(p, SPACE_CHARS);
691 if (av_strstart(p, "inline:", &p))
692 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
693 } else if (av_strstart(p, "source-filter:", &p)) {
694 int exclude = 0;
695 get_word(buf1, sizeof(buf1), &p);
696 if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
697 return;
698 exclude = !strcmp(buf1, "excl");
699
700 get_word(buf1, sizeof(buf1), &p);
701 if (strcmp(buf1, "IN") != 0)
702 return;
703 get_word(buf1, sizeof(buf1), &p);
704 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
705 return;
706 // not checking that the destination address actually matches or is wildcard
707 get_word(buf1, sizeof(buf1), &p);
708
709 while (*p != '\0') {
710 rtsp_src = av_mallocz(sizeof(*rtsp_src));
711 if (!rtsp_src)
712 return;
713 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
714 if (exclude) {
715 if (s->nb_streams == 0) {
716 dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
717 } else {
718 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
719 dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
720 }
721 } else {
722 if (s->nb_streams == 0) {
723 dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
724 } else {
725 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
726 dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
727 }
728 }
729 }
730 } else {
731 if (rt->server_type == RTSP_SERVER_WMS)
732 ff_wms_parse_sdp_a_line(s, p);
733 if (s->nb_streams > 0) {
734 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
735
736 if (rt->server_type == RTSP_SERVER_REAL)
737 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
738
739 if (rtsp_st->dynamic_handler &&
740 rtsp_st->dynamic_handler->parse_sdp_a_line)
741 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
742 rtsp_st->stream_index,
743 rtsp_st->dynamic_protocol_context, buf);
744 }
745 }
746 break;
747 }
748 }
749
750 int ff_sdp_parse(AVFormatContext *s, const char *content)
751 {
752 const char *p;
753 int letter, i;
754 char buf[SDP_MAX_SIZE], *q;
755 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
756
757 p = content;
758 for (;;) {
759 p += strspn(p, SPACE_CHARS);
760 letter = *p;
761 if (letter == '\0')
762 break;
763 p++;
764 if (*p != '=')
765 goto next_line;
766 p++;
767 /* get the content */
768 q = buf;
769 while (*p != '\n' && *p != '\r' && *p != '\0') {
770 if ((q - buf) < sizeof(buf) - 1)
771 *q++ = *p;
772 p++;
773 }
774 *q = '\0';
775 sdp_parse_line(s, s1, letter, buf);
776 next_line:
777 while (*p != '\n' && *p != '\0')
778 p++;
779 if (*p == '\n')
780 p++;
781 }
782
783 for (i = 0; i < s1->nb_default_include_source_addrs; i++)
784 av_freep(&s1->default_include_source_addrs[i]);
785 av_freep(&s1->default_include_source_addrs);
786 for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
787 av_freep(&s1->default_exclude_source_addrs[i]);
788 av_freep(&s1->default_exclude_source_addrs);
789
790 return 0;
791 }
792 #endif /* CONFIG_RTPDEC */
793
794 void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
795 {
796 RTSPState *rt = s->priv_data;
797 int i;
798
799 for (i = 0; i < rt->nb_rtsp_streams; i++) {
800 RTSPStream *rtsp_st = rt->rtsp_streams[i];
801 if (!rtsp_st)
802 continue;
803 if (rtsp_st->transport_priv) {
804 if (s->oformat) {
805 AVFormatContext *rtpctx = rtsp_st->transport_priv;
806 av_write_trailer(rtpctx);
807 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
808 if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
809 ff_rtsp_tcp_write_packet(s, rtsp_st);
810 ffio_free_dyn_buf(&rtpctx->pb);
811 } else {
812 avio_closep(&rtpctx->pb);
813 }
814 avformat_free_context(rtpctx);
815 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
816 ff_rdt_parse_close(rtsp_st->transport_priv);
817 else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
818 ff_rtp_parse_close(rtsp_st->transport_priv);
819 }
820 rtsp_st->transport_priv = NULL;
821 ffurl_closep(&rtsp_st->rtp_handle);
822 }
823 }
824
825 /* close and free RTSP streams */
826 void ff_rtsp_close_streams(AVFormatContext *s)
827 {
828 RTSPState *rt = s->priv_data;
829 int i, j;
830 RTSPStream *rtsp_st;
831
832 ff_rtsp_undo_setup(s, 0);
833 for (i = 0; i < rt->nb_rtsp_streams; i++) {
834 rtsp_st = rt->rtsp_streams[i];
835 if (rtsp_st) {
836 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) {
837 if (rtsp_st->dynamic_handler->close)
838 rtsp_st->dynamic_handler->close(
839 rtsp_st->dynamic_protocol_context);
840 av_free(rtsp_st->dynamic_protocol_context);
841 }
842 for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
843 av_freep(&rtsp_st->include_source_addrs[j]);
844 av_freep(&rtsp_st->include_source_addrs);
845 for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
846 av_freep(&rtsp_st->exclude_source_addrs[j]);
847 av_freep(&rtsp_st->exclude_source_addrs);
848
849 av_freep(&rtsp_st);
850 }
851 }
852 av_freep(&rt->rtsp_streams);
853 if (rt->asf_ctx) {
854 avformat_close_input(&rt->asf_ctx);
855 }
856 if (CONFIG_RTPDEC && rt->ts)
857 avpriv_mpegts_parse_close(rt->ts);
858 av_freep(&rt->p);
859 av_freep(&rt->recvbuf);
860 }
861
862 int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
863 {
864 RTSPState *rt = s->priv_data;
865 AVStream *st = NULL;
866 int reordering_queue_size = rt->reordering_queue_size;
867 if (reordering_queue_size < 0) {
868 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
869 reordering_queue_size = 0;
870 else
871 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
872 }
873
874 /* open the RTP context */
875 if (rtsp_st->stream_index >= 0)
876 st = s->streams[rtsp_st->stream_index];
877 if (!st)
878 s->ctx_flags |= AVFMTCTX_NOHEADER;
879
880 if (CONFIG_RTSP_MUXER && s->oformat && st) {
881 int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
882 s, st, rtsp_st->rtp_handle,
883 rt->pkt_size,
884 rtsp_st->stream_index);
885 /* Ownership of rtp_handle is passed to the rtp mux context */
886 rtsp_st->rtp_handle = NULL;
887 if (ret < 0)
888 return ret;
889 st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
890 } else if (rt->transport == RTSP_TRANSPORT_RAW) {
891 return 0; // Don't need to open any parser here
892 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT && st)
893 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
894 rtsp_st->dynamic_protocol_context,
895 rtsp_st->dynamic_handler);
896 else if (CONFIG_RTPDEC)
897 rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
898 rtsp_st->sdp_payload_type,
899 reordering_queue_size);
900
901 if (!rtsp_st->transport_priv) {
902 return AVERROR(ENOMEM);
903 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP &&
904 s->iformat) {
905 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
906 rtpctx->ssrc = rtsp_st->ssrc;
907 if (rtsp_st->dynamic_handler) {
908 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
909 rtsp_st->dynamic_protocol_context,
910 rtsp_st->dynamic_handler);
911 }
912 if (rtsp_st->crypto_suite[0])
913 ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
914 rtsp_st->crypto_suite,
915 rtsp_st->crypto_params);
916 }
917
918 return 0;
919 }
920
921 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
922 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
923 {
924 const char *q;
925 char *p;
926 int v;
927
928 q = *pp;
929 q += strspn(q, SPACE_CHARS);
930 v = strtol(q, &p, 10);
931 if (*p == '-') {
932 p++;
933 *min_ptr = v;
934 v = strtol(p, &p, 10);
935 *max_ptr = v;
936 } else {
937 *min_ptr = v;
938 *max_ptr = v;
939 }
940 *pp = p;
941 }
942
943 /* XXX: only one transport specification is parsed */
944 static void rtsp_parse_transport(AVFormatContext *s,
945 RTSPMessageHeader *reply, const char *p)
946 {
947 char transport_protocol[16];
948 char profile[16];
949 char lower_transport[16];
950 char parameter[16];
951 RTSPTransportField *th;
952 char buf[256];
953
954 reply->nb_transports = 0;
955
956 for (;;) {
957 p += strspn(p, SPACE_CHARS);
958 if (*p == '\0')
959 break;
960
961 th = &reply->transports[reply->nb_transports];
962
963 get_word_sep(transport_protocol, sizeof(transport_protocol),
964 "/", &p);
965 if (!av_strcasecmp (transport_protocol, "rtp")) {
966 get_word_sep(profile, sizeof(profile), "/;,", &p);
967 lower_transport[0] = '\0';
968 /* rtp/avp/<protocol> */
969 if (*p == '/') {
970 get_word_sep(lower_transport, sizeof(lower_transport),
971 ";,", &p);
972 }
973 th->transport = RTSP_TRANSPORT_RTP;
974 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
975 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
976 /* x-pn-tng/<protocol> */
977 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
978 profile[0] = '\0';
979 th->transport = RTSP_TRANSPORT_RDT;
980 } else if (!av_strcasecmp(transport_protocol, "raw")) {
981 get_word_sep(profile, sizeof(profile), "/;,", &p);
982 lower_transport[0] = '\0';
983 /* raw/raw/<protocol> */
984 if (*p == '/') {
985 get_word_sep(lower_transport, sizeof(lower_transport),
986 ";,", &p);
987 }
988 th->transport = RTSP_TRANSPORT_RAW;
989 } else {
990 break;
991 }
992 if (!av_strcasecmp(lower_transport, "TCP"))
993 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
994 else
995 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
996
997 if (*p == ';')
998 p++;
999 /* get each parameter */
1000 while (*p != '\0' && *p != ',') {
1001 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
1002 if (!strcmp(parameter, "port")) {
1003 if (*p == '=') {
1004 p++;
1005 rtsp_parse_range(&th->port_min, &th->port_max, &p);
1006 }
1007 } else if (!strcmp(parameter, "client_port")) {
1008 if (*p == '=') {
1009 p++;
1010 rtsp_parse_range(&th->client_port_min,
1011 &th->client_port_max, &p);
1012 }
1013 } else if (!strcmp(parameter, "server_port")) {
1014 if (*p == '=') {
1015 p++;
1016 rtsp_parse_range(&th->server_port_min,
1017 &th->server_port_max, &p);
1018 }
1019 } else if (!strcmp(parameter, "interleaved")) {
1020 if (*p == '=') {
1021 p++;
1022 rtsp_parse_range(&th->interleaved_min,
1023 &th->interleaved_max, &p);
1024 }
1025 } else if (!strcmp(parameter, "multicast")) {
1026 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
1027 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1028 } else if (!strcmp(parameter, "ttl")) {
1029 if (*p == '=') {
1030 char *end;
1031 p++;
1032 th->ttl = strtol(p, &end, 10);
1033 p = end;
1034 }
1035 } else if (!strcmp(parameter, "destination")) {
1036 if (*p == '=') {
1037 p++;
1038 get_word_sep(buf, sizeof(buf), ";,", &p);
1039 get_sockaddr(s, buf, &th->destination);
1040 }
1041 } else if (!strcmp(parameter, "source")) {
1042 if (*p == '=') {
1043 p++;
1044 get_word_sep(buf, sizeof(buf), ";,", &p);
1045 av_strlcpy(th->source, buf, sizeof(th->source));
1046 }
1047 } else if (!strcmp(parameter, "mode")) {
1048 if (*p == '=') {
1049 p++;
1050 get_word_sep(buf, sizeof(buf), ";, ", &p);
1051 if (!av_strcasecmp(buf, "record") ||
1052 !av_strcasecmp(buf, "receive"))
1053 th->mode_record = 1;
1054 }
1055 }
1056
1057 while (*p != ';' && *p != '\0' && *p != ',')
1058 p++;
1059 if (*p == ';')
1060 p++;
1061 }
1062 if (*p == ',')
1063 p++;
1064
1065 reply->nb_transports++;
1066 if (reply->nb_transports >= RTSP_MAX_TRANSPORTS)
1067 break;
1068 }
1069 }
1070
1071 static void handle_rtp_info(RTSPState *rt, const char *url,
1072 uint32_t seq, uint32_t rtptime)
1073 {
1074 int i;
1075 if (!rtptime || !url[0])
1076 return;
1077 if (rt->transport != RTSP_TRANSPORT_RTP)
1078 return;
1079 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1080 RTSPStream *rtsp_st = rt->rtsp_streams[i];
1081 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1082 if (!rtpctx)
1083 continue;
1084 if (!strcmp(rtsp_st->control_url, url)) {
1085 rtpctx->base_timestamp = rtptime;
1086 break;
1087 }
1088 }
1089 }
1090
1091 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
1092 {
1093 int read = 0;
1094 char key[20], value[MAX_URL_SIZE], url[MAX_URL_SIZE] = "";
1095 uint32_t seq = 0, rtptime = 0;
1096
1097 for (;;) {
1098 p += strspn(p, SPACE_CHARS);
1099 if (!*p)
1100 break;
1101 get_word_sep(key, sizeof(key), "=", &p);
1102 if (*p != '=')
1103 break;
1104 p++;
1105 get_word_sep(value, sizeof(value), ";, ", &p);
1106 read++;
1107 if (!strcmp(key, "url"))
1108 av_strlcpy(url, value, sizeof(url));
1109 else if (!strcmp(key, "seq"))
1110 seq = strtoul(value, NULL, 10);
1111 else if (!strcmp(key, "rtptime"))
1112 rtptime = strtoul(value, NULL, 10);
1113 if (*p == ',') {
1114 handle_rtp_info(rt, url, seq, rtptime);
1115 url[0] = '\0';
1116 seq = rtptime = 0;
1117 read = 0;
1118 }
1119 if (*p)
1120 p++;
1121 }
1122 if (read > 0)
1123 handle_rtp_info(rt, url, seq, rtptime);
1124 }
1125
1126 void ff_rtsp_parse_line(AVFormatContext *s,
1127 RTSPMessageHeader *reply, const char *buf,
1128 RTSPState *rt, const char *method)
1129 {
1130 const char *p;
1131
1132 /* NOTE: we do case independent match for broken servers */
1133 p = buf;
1134 if (av_stristart(p, "Session:", &p)) {
1135 int t;
1136 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
1137 if (av_stristart(p, ";timeout=", &p) &&
1138 (t = strtol(p, NULL, 10)) > 0) {
1139 reply->timeout = t;
1140 }
1141 } else if (av_stristart(p, "Content-Length:", &p)) {
1142 reply->content_length = strtol(p, NULL, 10);
1143 } else if (av_stristart(p, "Transport:", &p)) {
1144 rtsp_parse_transport(s, reply, p);
1145 } else if (av_stristart(p, "CSeq:", &p)) {
1146 reply->seq = strtol(p, NULL, 10);
1147 } else if (av_stristart(p, "Range:", &p)) {
1148 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1149 } else if (av_stristart(p, "RealChallenge1:", &p)) {
1150 p += strspn(p, SPACE_CHARS);
1151 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1152 } else if (av_stristart(p, "Server:", &p)) {
1153 p += strspn(p, SPACE_CHARS);
1154 av_strlcpy(reply->server, p, sizeof(reply->server));
1155 } else if (av_stristart(p, "Notice:", &p) ||
1156 av_stristart(p, "X-Notice:", &p)) {
1157 reply->notice = strtol(p, NULL, 10);
1158 } else if (av_stristart(p, "Location:", &p)) {
1159 p += strspn(p, SPACE_CHARS);
1160 av_strlcpy(reply->location, p , sizeof(reply->location));
1161 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
1162 p += strspn(p, SPACE_CHARS);
1163 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
1164 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1165 p += strspn(p, SPACE_CHARS);
1166 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1167 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1168 p += strspn(p, SPACE_CHARS);
1169 if (method && !strcmp(method, "DESCRIBE"))
1170 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1171 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
1172 p += strspn(p, SPACE_CHARS);
1173 if (method && !strcmp(method, "PLAY"))
1174 rtsp_parse_rtp_info(rt, p);
1175 } else if (av_stristart(p, "Public:", &p) && rt) {
1176 if (strstr(p, "GET_PARAMETER") &&
1177 method && !strcmp(method, "OPTIONS"))
1178 rt->get_parameter_supported = 1;
1179 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
1180 p += strspn(p, SPACE_CHARS);
1181 rt->accept_dynamic_rate = atoi(p);
1182 } else if (av_stristart(p, "Content-Type:", &p)) {
1183 p += strspn(p, SPACE_CHARS);
1184 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1185 } else if (av_stristart(p, "com.ses.streamID:", &p)) {
1186 p += strspn(p, SPACE_CHARS);
1187 av_strlcpy(reply->stream_id, p, sizeof(reply->stream_id));
1188 }
1189 }
1190
1191 /* skip a RTP/TCP interleaved packet */
1192 int ff_rtsp_skip_packet(AVFormatContext *s)
1193 {
1194 RTSPState *rt = s->priv_data;
1195 int ret, len, len1;
1196 uint8_t buf[MAX_URL_SIZE];
1197
1198 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1199 if (ret != 3)
1200 return ret < 0 ? ret : AVERROR(EIO);
1201 len = AV_RB16(buf + 1);
1202
1203 av_log(s, AV_LOG_TRACE, "skipping RTP packet len=%d\n", len);
1204
1205 /* skip payload */
1206 while (len > 0) {
1207 len1 = len;
1208 if (len1 > sizeof(buf))
1209 len1 = sizeof(buf);
1210 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1211 if (ret != len1)
1212 return ret < 0 ? ret : AVERROR(EIO);
1213 len -= len1;
1214 }
1215
1216 return 0;
1217 }
1218
1219 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
1220 unsigned char **content_ptr,
1221 int return_on_interleaved_data, const char *method)
1222 {
1223 RTSPState *rt = s->priv_data;
1224 char buf[MAX_URL_SIZE], buf1[MAX_URL_SIZE], *q;
1225 unsigned char ch;
1226 const char *p;
1227 int ret, content_length, line_count, request;
1228 unsigned char *content;
1229
1230 start:
1231 line_count = 0;
1232 request = 0;
1233 content = NULL;
1234 memset(reply, 0, sizeof(*reply));
1235
1236 /* parse reply (XXX: use buffers) */
1237 rt->last_reply[0] = '\0';
1238 for (;;) {
1239 q = buf;
1240 for (;;) {
1241 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1242 av_log(s, AV_LOG_TRACE, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1243 if (ret != 1)
1244 return ret < 0 ? ret : AVERROR(EIO);
1245 if (ch == '\n')
1246 break;
1247 if (ch == '$' && q == buf) {
1248 if (return_on_interleaved_data) {
1249 return 1;
1250 } else {
1251 ret = ff_rtsp_skip_packet(s);
1252 if (ret < 0)
1253 return ret;
1254 }
1255 } else if (ch != '\r') {
1256 if ((q - buf) < sizeof(buf) - 1)
1257 *q++ = ch;
1258 }
1259 }
1260 *q = '\0';
1261
1262 av_log(s, AV_LOG_TRACE, "line='%s'\n", buf);
1263
1264 /* test if last line */
1265 if (buf[0] == '\0')
1266 break;
1267 p = buf;
1268 if (line_count == 0) {
1269 /* get reply code */
1270 get_word(buf1, sizeof(buf1), &p);
1271 if (!strncmp(buf1, "RTSP/", 5)) {
1272 get_word(buf1, sizeof(buf1), &p);
1273 reply->status_code = atoi(buf1);
1274 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1275 } else {
1276 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1277 get_word(buf1, sizeof(buf1), &p); // object
1278 request = 1;
1279 }
1280 } else {
1281 ff_rtsp_parse_line(s, reply, p, rt, method);
1282 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1283 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1284 }
1285 line_count++;
1286 }
1287
1288 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1289 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1290
1291 content_length = reply->content_length;
1292 if (content_length > 0) {
1293 /* leave some room for a trailing '\0' (useful for simple parsing) */
1294 content = av_malloc(content_length + 1);
1295 if (!content)
1296 return AVERROR(ENOMEM);
1297 if ((ret = ffurl_read_complete(rt->rtsp_hd, content, content_length)) != content_length) {
1298 av_freep(&content);
1299 return ret < 0 ? ret : AVERROR(EIO);
1300 }
1301 content[content_length] = '\0';
1302 }
1303 if (content_ptr)
1304 *content_ptr = content;
1305 else
1306 av_freep(&content);
1307
1308 if (request) {
1309 char buf[MAX_URL_SIZE];
1310 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1311 const char* ptr = buf;
1312
1313 if (!strcmp(reply->reason, "OPTIONS") ||
1314 !strcmp(reply->reason, "GET_PARAMETER")) {
1315 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1316 if (reply->seq)
1317 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1318 if (reply->session_id[0])
1319 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1320 reply->session_id);
1321 } else {
1322 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1323 }
1324 av_strlcat(buf, "\r\n", sizeof(buf));
1325
1326 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1327 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1328 ptr = base64buf;
1329 }
1330 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1331
1332 rt->last_cmd_time = av_gettime_relative();
1333 /* Even if the request from the server had data, it is not the data
1334 * that the caller wants or expects. The memory could also be leaked
1335 * if the actual following reply has content data. */
1336 if (content_ptr)
1337 av_freep(content_ptr);
1338 /* If method is set, this is called from ff_rtsp_send_cmd,
1339 * where a reply to exactly this request is awaited. For
1340 * callers from within packet receiving, we just want to
1341 * return to the caller and go back to receiving packets. */
1342 if (method)
1343 goto start;
1344 return 0;
1345 }
1346
1347 if (rt->seq != reply->seq) {
1348 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1349 rt->seq, reply->seq);
1350 }
1351
1352 /* EOS */
1353 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1354 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1355 reply->notice == 2306 /* Continuous Feed Terminated */) {
1356 rt->state = RTSP_STATE_IDLE;
1357 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1358 return AVERROR(EIO); /* data or server error */
1359 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1360 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1361 return AVERROR(EPERM);
1362
1363 return 0;
1364 }
1365
1366 /**
1367 * Send a command to the RTSP server without waiting for the reply.
1368 *
1369 * @param s RTSP (de)muxer context
1370 * @param method the method for the request
1371 * @param url the target url for the request
1372 * @param headers extra header lines to include in the request
1373 * @param send_content if non-null, the data to send as request body content
1374 * @param send_content_length the length of the send_content data, or 0 if
1375 * send_content is null
1376 *
1377 * @return zero if success, nonzero otherwise
1378 */
1379 static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
1380 const char *method, const char *url,
1381 const char *headers,
1382 const unsigned char *send_content,
1383 int send_content_length)
1384 {
1385 RTSPState *rt = s->priv_data;
1386 char buf[MAX_URL_SIZE], *out_buf;
1387 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1388
1389 if (!rt->rtsp_hd_out)
1390 return AVERROR(ENOTCONN);
1391
1392 /* Add in RTSP headers */
1393 out_buf = buf;
1394 rt->seq++;
1395 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1396 if (headers)
1397 av_strlcat(buf, headers, sizeof(buf));
1398 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1399 av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", rt->user_agent);
1400 if (rt->session_id[0] != '\0' && (!headers ||
1401 !strstr(headers, "\nIf-Match:"))) {
1402 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1403 }
1404 if (rt->auth[0]) {
1405 char *str = ff_http_auth_create_response(&rt->auth_state,
1406 rt->auth, url, method);
1407 if (str)
1408 av_strlcat(buf, str, sizeof(buf));
1409 av_free(str);
1410 }
1411 if (send_content_length > 0 && send_content)
1412 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1413 av_strlcat(buf, "\r\n", sizeof(buf));
1414
1415 /* base64 encode rtsp if tunneling */
1416 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1417 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1418 out_buf = base64buf;
1419 }
1420
1421 av_log(s, AV_LOG_TRACE, "Sending:\n%s--\n", buf);
1422
1423 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1424 if (send_content_length > 0 && send_content) {
1425 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1426 avpriv_report_missing_feature(s, "Tunneling of RTSP requests with content data");
1427 return AVERROR_PATCHWELCOME;
1428 }
1429 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1430 }
1431 rt->last_cmd_time = av_gettime_relative();
1432
1433 return 0;
1434 }
1435
1436 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1437 const char *url, const char *headers)
1438 {
1439 return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1440 }
1441
1442 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1443 const char *headers, RTSPMessageHeader *reply,
1444 unsigned char **content_ptr)
1445 {
1446 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1447 content_ptr, NULL, 0);
1448 }
1449
1450 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1451 const char *method, const char *url,
1452 const char *header,
1453 RTSPMessageHeader *reply,
1454 unsigned char **content_ptr,
1455 const unsigned char *send_content,
1456 int send_content_length)
1457 {
1458 RTSPState *rt = s->priv_data;
1459 HTTPAuthType cur_auth_type;
1460 int ret, attempts = 0;
1461
1462 retry:
1463 cur_auth_type = rt->auth_state.auth_type;
1464 if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
1465 send_content,
1466 send_content_length)) < 0)
1467 return ret;
1468
1469 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1470 return ret;
1471 attempts++;
1472
1473 if (reply->status_code == 401 &&
1474 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1475 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1476 goto retry;
1477
1478 if (reply->status_code > 400){
1479 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1480 method,
1481 reply->status_code,
1482 reply->reason);
1483 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1484 }
1485
1486 return 0;
1487 }
1488
1489 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1490 int lower_transport, const char *real_challenge)
1491 {
1492 RTSPState *rt = s->priv_data;
1493 int rtx = 0, j, i, err, interleave = 0, port_off = 0;
1494 RTSPStream *rtsp_st;
1495 RTSPMessageHeader reply1, *reply = &reply1;
1496 char cmd[MAX_URL_SIZE];
1497 const char *trans_pref;
1498
1499 memset(&reply1, 0, sizeof(reply1));
1500
1501 if (rt->transport == RTSP_TRANSPORT_RDT)
1502 trans_pref = "x-pn-tng";
1503 else if (rt->transport == RTSP_TRANSPORT_RAW)
1504 trans_pref = "RAW/RAW";
1505 else
1506 trans_pref = "RTP/AVP";
1507
1508 /* default timeout: 1 minute */
1509 rt->timeout = 60;
1510
1511 /* Choose a random starting offset within the first half of the
1512 * port range, to allow for a number of ports to try even if the offset
1513 * happens to be at the end of the random range. */
1514 if (rt->rtp_port_max - rt->rtp_port_min >= 4) {
1515 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1516 /* even random offset */
1517 port_off -= port_off & 0x01;
1518 }
1519
1520 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1521 char transport[MAX_URL_SIZE];
1522
1523 /*
1524 * WMS serves all UDP data over a single connection, the RTX, which
1525 * isn't necessarily the first in the SDP but has to be the first
1526 * to be set up, else the second/third SETUP will fail with a 461.
1527 */
1528 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1529 rt->server_type == RTSP_SERVER_WMS) {
1530 if (i == 0) {
1531 /* rtx first */
1532 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1533 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1534 if (len >= 4 &&
1535 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1536 "/rtx"))
1537 break;
1538 }
1539 if (rtx == rt->nb_rtsp_streams)
1540 return -1; /* no RTX found */
1541 rtsp_st = rt->rtsp_streams[rtx];
1542 } else
1543 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1544 } else
1545 rtsp_st = rt->rtsp_streams[i];
1546
1547 /* RTP/UDP */
1548 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1549 char buf[256];
1550
1551 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1552 port = reply->transports[0].client_port_min;
1553 goto have_port;
1554 }
1555
1556 /* first try in specified port range */
1557 while (j + 1 <= rt->rtp_port_max) {
1558 AVDictionary *opts = map_to_opts(rt);
1559
1560 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1561 "?localport=%d", j);
1562 /* we will use two ports per rtp stream (rtp and rtcp) */
1563 j += 2;
1564 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1565 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1566
1567 av_dict_free(&opts);
1568
1569 if (!err)
1570 goto rtp_opened;
1571 }
1572 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1573 err = AVERROR(EIO);
1574 goto fail;
1575
1576 rtp_opened:
1577 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1578 have_port:
1579 av_strlcpy(transport, trans_pref, sizeof(transport));
1580 av_strlcat(transport,
1581 rt->server_type == RTSP_SERVER_SATIP ? ";" : "/UDP;",
1582 sizeof(transport));
1583 if (rt->server_type != RTSP_SERVER_REAL)
1584 av_strlcat(transport, "unicast;", sizeof(transport));
1585 av_strlcatf(transport, sizeof(transport),
1586 "client_port=%d", port);
1587 if (rt->transport == RTSP_TRANSPORT_RTP &&
1588 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1589 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1590 }
1591
1592 /* RTP/TCP */
1593 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1594 /* For WMS streams, the application streams are only used for
1595 * UDP. When trying to set it up for TCP streams, the server
1596 * will return an error. Therefore, we skip those streams. */
1597 if (rt->server_type == RTSP_SERVER_WMS &&
1598 (rtsp_st->stream_index < 0 ||
1599 s->streams[rtsp_st->stream_index]->codecpar->codec_type ==
1600 AVMEDIA_TYPE_DATA))
1601 continue;
1602 snprintf(transport, sizeof(transport) - 1,
1603 "%s/TCP;", trans_pref);
1604 if (rt->transport != RTSP_TRANSPORT_RDT)
1605 av_strlcat(transport, "unicast;", sizeof(transport));
1606 av_strlcatf(transport, sizeof(transport),
1607 "interleaved=%d-%d",
1608 interleave, interleave + 1);
1609 interleave += 2;
1610 }
1611
1612 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1613 snprintf(transport, sizeof(transport) - 1,
1614 "%s/UDP;multicast", trans_pref);
1615 } else {
1616 err = AVERROR(EINVAL);
1617 goto fail; // transport would be uninitialized
1618 }
1619
1620 if (s->oformat) {
1621 av_strlcat(transport, ";mode=record", sizeof(transport));
1622 } else if (rt->server_type == RTSP_SERVER_REAL ||
1623 rt->server_type == RTSP_SERVER_WMS)
1624 av_strlcat(transport, ";mode=play", sizeof(transport));
1625 snprintf(cmd, sizeof(cmd),
1626 "Transport: %s\r\n",
1627 transport);
1628 if (rt->accept_dynamic_rate)
1629 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1630 if (CONFIG_RTPDEC && i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1631 char real_res[41], real_csum[9];
1632 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1633 real_challenge);
1634 av_strlcatf(cmd, sizeof(cmd),
1635 "If-Match: %s\r\n"
1636 "RealChallenge2: %s, sd=%s\r\n",
1637 rt->session_id, real_res, real_csum);
1638 }
1639 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1640 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1641 err = 1;
1642 goto fail;
1643 } else if (reply->status_code != RTSP_STATUS_OK ||
1644 reply->nb_transports != 1) {
1645 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
1646 goto fail;
1647 }
1648
1649 if (rt->server_type == RTSP_SERVER_SATIP && reply->stream_id[0]) {
1650 char proto[128], host[128], path[512], auth[128];
1651 int port;
1652 av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host),
1653 &port, path, sizeof(path), rt->control_uri);
1654 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host,
1655 port, "/stream=%s", reply->stream_id);
1656 }
1657
1658 /* XXX: same protocol for all streams is required */
1659 if (i > 0) {
1660 if (reply->transports[0].lower_transport != rt->lower_transport ||
1661 reply->transports[0].transport != rt->transport) {
1662 err = AVERROR_INVALIDDATA;
1663 goto fail;
1664 }
1665 } else {
1666 rt->lower_transport = reply->transports[0].lower_transport;
1667 rt->transport = reply->transports[0].transport;
1668 }
1669
1670 /* Fail if the server responded with another lower transport mode
1671 * than what we requested. */
1672 if (reply->transports[0].lower_transport != lower_transport) {
1673 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1674 err = AVERROR_INVALIDDATA;
1675 goto fail;
1676 }
1677
1678 switch(reply->transports[0].lower_transport) {
1679 case RTSP_LOWER_TRANSPORT_TCP:
1680 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1681 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1682 break;
1683
1684 case RTSP_LOWER_TRANSPORT_UDP: {
1685 char url[MAX_URL_SIZE], options[30] = "";
1686 const char *peer = host;
1687
1688 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1689 av_strlcpy(options, "?connect=1", sizeof(options));
1690 /* Use source address if specified */
1691 if (reply->transports[0].source[0])
1692 peer = reply->transports[0].source;
1693 ff_url_join(url, sizeof(url), "rtp", NULL, peer,
1694 reply->transports[0].server_port_min, "%s", options);
1695 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1696 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1697 err = AVERROR_INVALIDDATA;
1698 goto fail;
1699 }
1700 break;
1701 }
1702 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1703 char url[MAX_URL_SIZE], namebuf[50], optbuf[20] = "";
1704 struct sockaddr_storage addr;
1705 int port, ttl;
1706 AVDictionary *opts = map_to_opts(rt);
1707
1708 if (reply->transports[0].destination.ss_family) {
1709 addr = reply->transports[0].destination;
1710 port = reply->transports[0].port_min;
1711 ttl = reply->transports[0].ttl;
1712 } else {
1713 addr = rtsp_st->sdp_ip;
1714 port = rtsp_st->sdp_port;
1715 ttl = rtsp_st->sdp_ttl;
1716 }
1717 if (ttl > 0)
1718 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1719 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1720 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1721 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1722 port, "%s", optbuf);
1723 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1724 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1725 av_dict_free(&opts);
1726
1727 if (err < 0) {
1728 err = AVERROR_INVALIDDATA;
1729 goto fail;
1730 }
1731 break;
1732 }
1733 }
1734
1735 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1736 goto fail;
1737 }
1738
1739 if (rt->nb_rtsp_streams && reply->timeout > 0)
1740 rt->timeout = reply->timeout;
1741
1742 if (rt->server_type == RTSP_SERVER_REAL)
1743 rt->need_subscription = 1;
1744
1745 return 0;
1746
1747 fail:
1748 ff_rtsp_undo_setup(s, 0);
1749 return err;
1750 }
1751
1752 void ff_rtsp_close_connections(AVFormatContext *s)
1753 {
1754 RTSPState *rt = s->priv_data;
1755 if (rt->rtsp_hd_out != rt->rtsp_hd)
1756 ffurl_closep(&rt->rtsp_hd_out);
1757 rt->rtsp_hd_out = NULL;
1758 ffurl_closep(&rt->rtsp_hd);
1759 }
1760
1761 int ff_rtsp_connect(AVFormatContext *s)
1762 {
1763 RTSPState *rt = s->priv_data;
1764 char proto[128], host[1024], path[2048];
1765 char tcpname[1024], cmd[MAX_URL_SIZE], auth[128];
1766 const char *lower_rtsp_proto = "tcp";
1767 int port, err, tcp_fd;
1768 RTSPMessageHeader reply1, *reply = &reply1;
1769 int lower_transport_mask = 0;
1770 int default_port = RTSP_DEFAULT_PORT;
1771 int https_tunnel = 0;
1772 char real_challenge[64] = "";
1773 struct sockaddr_storage peer;
1774 socklen_t peer_len = sizeof(peer);
1775
1776 if (rt->rtp_port_max < rt->rtp_port_min) {
1777 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1778 "than min port %d\n", rt->rtp_port_max,
1779 rt->rtp_port_min);
1780 return AVERROR(EINVAL);
1781 }
1782
1783 if (!ff_network_init())
1784 return AVERROR(EIO);
1785
1786 if (s->max_delay < 0) /* Not set by the caller */
1787 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1788
1789 rt->control_transport = RTSP_MODE_PLAIN;
1790 if (rt->lower_transport_mask & ((1 << RTSP_LOWER_TRANSPORT_HTTP) |
1791 (1 << RTSP_LOWER_TRANSPORT_HTTPS))) {
1792 https_tunnel = !!(rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTPS));
1793 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1794 rt->control_transport = RTSP_MODE_TUNNEL;
1795 }
1796 /* Only pass through valid flags from here */
1797 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1798
1799 redirect:
1800 memset(&reply1, 0, sizeof(reply1));
1801 /* extract hostname and port */
1802 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
1803 host, sizeof(host), &port, path, sizeof(path), s->url);
1804
1805 if (!strcmp(proto, "rtsps")) {
1806 lower_rtsp_proto = "tls";
1807 default_port = RTSPS_DEFAULT_PORT;
1808 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1809 } else if (!strcmp(proto, "satip")) {
1810 av_strlcpy(proto, "rtsp", sizeof(proto));
1811 rt->server_type = RTSP_SERVER_SATIP;
1812 }
1813
1814 if (*auth) {
1815 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1816 }
1817 if (port < 0)
1818 port = default_port;
1819
1820 lower_transport_mask = rt->lower_transport_mask;
1821
1822 if (!lower_transport_mask)
1823 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1824
1825 if (s->oformat) {
1826 /* Only UDP or TCP - UDP multicast isn't supported. */
1827 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1828 (1 << RTSP_LOWER_TRANSPORT_TCP);
1829 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1830 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1831 "only UDP and TCP are supported for output.\n");
1832 err = AVERROR(EINVAL);
1833 goto fail;
1834 }
1835 }
1836
1837 /* Construct the URI used in request; this is similar to s->url,
1838 * but with authentication credentials removed and RTSP specific options
1839 * stripped out. */
1840 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
1841 host, port, "%s", path);
1842
1843 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1844 /* set up initial handshake for tunneling */
1845 char httpname[1024];
1846 char sessioncookie[17];
1847 char headers[1024];
1848 AVDictionary *options = NULL;
1849
1850 av_dict_set_int(&options, "timeout", rt->stimeout, 0);
1851 if (https_tunnel) {
1852 int ret = copy_tls_opts_dict(rt, &options);
1853 if (ret < 0) {
1854 av_dict_free(&options);
1855 err = ret;
1856 goto fail;
1857 }
1858 }
1859
1860 ff_url_join(httpname, sizeof(httpname), https_tunnel ? "https" : "http", auth, host, port, "%s", path);
1861 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1862 av_get_random_seed(), av_get_random_seed());
1863
1864 /* GET requests */
1865 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1866 &s->interrupt_callback) < 0) {
1867 av_dict_free(&options);
1868 err = AVERROR(EIO);
1869 goto fail;
1870 }
1871
1872 /* generate GET headers */
1873 snprintf(headers, sizeof(headers),
1874 "x-sessioncookie: %s\r\n"
1875 "Accept: application/x-rtsp-tunnelled\r\n"
1876 "Pragma: no-cache\r\n"
1877 "Cache-Control: no-cache\r\n",
1878 sessioncookie);
1879 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1880
1881 if (!rt->rtsp_hd->protocol_whitelist && s->protocol_whitelist) {
1882 rt->rtsp_hd->protocol_whitelist = av_strdup(s->protocol_whitelist);
1883 if (!rt->rtsp_hd->protocol_whitelist) {
1884 av_dict_free(&options);
1885 err = AVERROR(ENOMEM);
1886 goto fail;
1887 }
1888 }
1889
1890 /* complete the connection */
1891 if (ffurl_connect(rt->rtsp_hd, &options)) {
1892 av_dict_free(&options);
1893 err = AVERROR(EIO);
1894 goto fail;
1895 }
1896
1897 /* POST requests */
1898 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1899 &s->interrupt_callback) < 0 ) {
1900 av_dict_free(&options);
1901 err = AVERROR(EIO);
1902 goto fail;
1903 }
1904
1905 /* generate POST headers */
1906 snprintf(headers, sizeof(headers),
1907 "x-sessioncookie: %s\r\n"
1908 "Content-Type: application/x-rtsp-tunnelled\r\n"
1909 "Pragma: no-cache\r\n"
1910 "Cache-Control: no-cache\r\n"
1911 "Content-Length: 32767\r\n"
1912 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1913 sessioncookie);
1914 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1915 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1916 av_opt_set(rt->rtsp_hd_out->priv_data, "send_expect_100", "0", 0);
1917
1918 /* Initialize the authentication state for the POST session. The HTTP
1919 * protocol implementation doesn't properly handle multi-pass
1920 * authentication for POST requests, since it would require one of
1921 * the following:
1922 * - implementing Expect: 100-continue, which many HTTP servers
1923 * don't support anyway, even less the RTSP servers that do HTTP
1924 * tunneling
1925 * - sending the whole POST data until getting a 401 reply specifying
1926 * what authentication method to use, then resending all that data
1927 * - waiting for potential 401 replies directly after sending the
1928 * POST header (waiting for some unspecified time)
1929 * Therefore, we copy the full auth state, which works for both basic
1930 * and digest. (For digest, we would have to synchronize the nonce
1931 * count variable between the two sessions, if we'd do more requests
1932 * with the original session, though.)
1933 */
1934 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1935
1936 /* complete the connection */
1937 if (ffurl_connect(rt->rtsp_hd_out, &options)) {
1938 av_dict_free(&options);
1939 err = AVERROR(EIO);
1940 goto fail;
1941 }
1942 av_dict_free(&options);
1943 } else {
1944 int ret;
1945 /* open the tcp connection */
1946 AVDictionary *proto_opts = NULL;
1947 if (strcmp("tls", lower_rtsp_proto) == 0) {
1948 ret = copy_tls_opts_dict(rt, &proto_opts);
1949 if (ret < 0) {
1950 av_dict_free(&proto_opts);
1951 err = ret;
1952 goto fail;
1953 }
1954 }
1955
1956 ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
1957 host, port,
1958 "?timeout=%"PRId64, rt->stimeout);
1959 if ((ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1960 &s->interrupt_callback, &proto_opts, s->protocol_whitelist, s->protocol_blacklist, NULL)) < 0) {
1961 av_dict_free(&proto_opts);
1962 err = ret;
1963 goto fail;
1964 }
1965 av_dict_free(&proto_opts);
1966 rt->rtsp_hd_out = rt->rtsp_hd;
1967 }
1968 rt->seq = 0;
1969
1970 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1971 if (tcp_fd < 0) {
1972 err = tcp_fd;
1973 goto fail;
1974 }
1975 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1976 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1977 NULL, 0, NI_NUMERICHOST);
1978 }
1979
1980 /* request options supported by the server; this also detects server
1981 * type */
1982 if (rt->server_type != RTSP_SERVER_SATIP)
1983 rt->server_type = RTSP_SERVER_RTP;
1984 for (;;) {
1985 cmd[0] = 0;
1986 if (rt->server_type == RTSP_SERVER_REAL)
1987 av_strlcat(cmd,
1988 /*
1989 * The following entries are required for proper
1990 * streaming from a Realmedia server. They are
1991 * interdependent in some way although we currently
1992 * don't quite understand how. Values were copied
1993 * from mplayer SVN r23589.
1994 * ClientChallenge is a 16-byte ID in hex
1995 * CompanyID is a 16-byte ID in base64
1996 */
1997 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1998 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1999 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
2000 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
2001 sizeof(cmd));
2002 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
2003 if (reply->status_code != RTSP_STATUS_OK) {
2004 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
2005 goto fail;
2006 }
2007
2008 /* detect server type if not standard-compliant RTP */
2009 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
2010 rt->server_type = RTSP_SERVER_REAL;
2011 continue;
2012 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
2013 rt->server_type = RTSP_SERVER_WMS;
2014 } else if (rt->server_type == RTSP_SERVER_REAL)
2015 strcpy(real_challenge, reply->real_challenge);
2016 break;
2017 }
2018
2019 #if CONFIG_RTSP_DEMUXER
2020 if (s->iformat) {
2021 if (rt->server_type == RTSP_SERVER_SATIP)
2022 err = init_satip_stream(s);
2023 else
2024 err = ff_rtsp_setup_input_streams(s, reply);
2025 } else
2026 #endif
2027 if (CONFIG_RTSP_MUXER)
2028 err = ff_rtsp_setup_output_streams(s, host);
2029 else
2030 av_unreachable("Either muxer or demuxer must be enabled");
2031 if (err)
2032 goto fail;
2033
2034 do {
2035 int lower_transport = ff_log2_tab[lower_transport_mask &
2036 ~(lower_transport_mask - 1)];
2037
2038 if ((lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP))
2039 && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP))
2040 lower_transport = RTSP_LOWER_TRANSPORT_TCP;
2041
2042 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
2043 rt->server_type == RTSP_SERVER_REAL ?
2044 real_challenge : NULL);
2045 if (err < 0)
2046 goto fail;
2047 lower_transport_mask &= ~(1 << lower_transport);
2048 if (lower_transport_mask == 0 && err == 1) {
2049 err = AVERROR(EPROTONOSUPPORT);
2050 goto fail;
2051 }
2052 } while (err);
2053
2054 rt->lower_transport_mask = lower_transport_mask;
2055 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
2056 rt->state = RTSP_STATE_IDLE;
2057 rt->seek_timestamp = 0; /* default is to start stream at position zero */
2058 return 0;
2059 fail:
2060 ff_rtsp_close_streams(s);
2061 ff_rtsp_close_connections(s);
2062 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
2063 char *new_url = av_strdup(reply->location);
2064 if (!new_url) {
2065 err = AVERROR(ENOMEM);
2066 goto fail2;
2067 }
2068 ff_format_set_url(s, new_url);
2069 rt->session_id[0] = '\0';
2070 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
2071 reply->status_code,
2072 s->url);
2073 goto redirect;
2074 }
2075 fail2:
2076 ff_network_close();
2077 return err;
2078 }
2079 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
2080
2081 #if CONFIG_RTPDEC
2082 #if CONFIG_RTSP_DEMUXER
2083 static int parse_rtsp_message(AVFormatContext *s)
2084 {
2085 RTSPState *rt = s->priv_data;
2086 int ret;
2087
2088 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
2089 if (rt->state == RTSP_STATE_STREAMING) {
2090 return ff_rtsp_parse_streaming_commands(s);
2091 } else
2092 return AVERROR_EOF;
2093 } else {
2094 RTSPMessageHeader reply;
2095 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
2096 if (ret < 0)
2097 return ret;
2098 /* XXX: parse message */
2099 if (rt->state != RTSP_STATE_STREAMING)
2100 return 0;
2101 }
2102
2103 return 0;
2104 }
2105 #endif
2106
2107 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
2108 uint8_t *buf, int buf_size, int64_t wait_end)
2109 {
2110 RTSPState *rt = s->priv_data;
2111 RTSPStream *rtsp_st;
2112 int n, i, ret;
2113 struct pollfd *p = rt->p;
2114 int *fds = NULL, fdsnum, fdsidx;
2115 int64_t runs = rt->stimeout / POLLING_TIME / 1000;
2116
2117 if (!p) {
2118 p = rt->p = av_malloc_array(2 * rt->nb_rtsp_streams + 1, sizeof(*p));
2119 if (!p)
2120 return AVERROR(ENOMEM);
2121
2122 if (rt->rtsp_hd) {
2123 p[rt->max_p].fd = ffurl_get_file_handle(rt->rtsp_hd);
2124 p[rt->max_p++].events = POLLIN;
2125 }
2126 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2127 rtsp_st = rt->rtsp_streams[i];
2128 if (rtsp_st->rtp_handle) {
2129 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
2130 &fds, &fdsnum)) {
2131 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
2132 return ret;
2133 }
2134 if (fdsnum != 2) {
2135 av_log(s, AV_LOG_ERROR,
2136 "Number of fds %d not supported\n", fdsnum);
2137 av_freep(&fds);
2138 return AVERROR_INVALIDDATA;
2139 }
2140 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
2141 p[rt->max_p].fd = fds[fdsidx];
2142 p[rt->max_p++].events = POLLIN;
2143 }
2144 av_freep(&fds);
2145 }
2146 }
2147 }
2148
2149 for (;;) {
2150 if (ff_check_interrupt(&s->interrupt_callback))
2151 return AVERROR_EXIT;
2152 if (wait_end && wait_end - av_gettime_relative() < 0)
2153 return AVERROR(EAGAIN);
2154 n = poll(p, rt->max_p, POLLING_TIME);
2155 if (n > 0) {
2156 int j = rt->rtsp_hd ? 1 : 0;
2157 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2158 rtsp_st = rt->rtsp_streams[i];
2159 if (rtsp_st->rtp_handle) {
2160 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
2161 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
2162 if (ret > 0) {
2163 *prtsp_st = rtsp_st;
2164 return ret;
2165 }
2166 }
2167 j+=2;
2168 }
2169 }
2170 #if CONFIG_RTSP_DEMUXER
2171 if (rt->rtsp_hd && p[0].revents & POLLIN) {
2172 if ((ret = parse_rtsp_message(s)) < 0) {
2173 return ret;
2174 }
2175 }
2176 #endif
2177 } else if (n == 0 && rt->stimeout > 0 && --runs <= 0) {
2178 return AVERROR(ETIMEDOUT);
2179 } else if (n < 0 && errno != EINTR)
2180 return AVERROR(errno);
2181 }
2182 }
2183
2184 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
2185 const uint8_t *buf, int len)
2186 {
2187 RTSPState *rt = s->priv_data;
2188 int i;
2189 if (len < 0)
2190 return len;
2191 if (rt->nb_rtsp_streams == 1) {
2192 *rtsp_st = rt->rtsp_streams[0];
2193 return len;
2194 }
2195 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
2196 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
2197 int no_ssrc = 0;
2198 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2199 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2200 if (!rtpctx)
2201 continue;
2202 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
2203 *rtsp_st = rt->rtsp_streams[i];
2204 return len;
2205 }
2206 if (!rtpctx->ssrc)
2207 no_ssrc = 1;
2208 }
2209 if (no_ssrc) {
2210 av_log(s, AV_LOG_WARNING,
2211 "Unable to pick stream for packet - SSRC not known for "
2212 "all streams\n");
2213 return AVERROR(EAGAIN);
2214 }
2215 } else {
2216 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2217 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
2218 *rtsp_st = rt->rtsp_streams[i];
2219 return len;
2220 }
2221 }
2222 }
2223 }
2224 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
2225 return AVERROR(EAGAIN);
2226 }
2227
2228 static int read_packet(AVFormatContext *s,
2229 RTSPStream **rtsp_st, RTSPStream *first_queue_st,
2230 int64_t wait_end)
2231 {
2232 RTSPState *rt = s->priv_data;
2233 int len;
2234
2235 switch(rt->lower_transport) {
2236 default:
2237 #if CONFIG_RTSP_DEMUXER
2238 case RTSP_LOWER_TRANSPORT_TCP:
2239 len = ff_rtsp_tcp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2240 break;
2241 #endif
2242 case RTSP_LOWER_TRANSPORT_UDP:
2243 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
2244 len = udp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2245 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2246 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, (*rtsp_st)->rtp_handle, NULL, len);
2247 break;
2248 case RTSP_LOWER_TRANSPORT_CUSTOM:
2249 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
2250 wait_end && wait_end < av_gettime_relative())
2251 len = AVERROR(EAGAIN);
2252 else
2253 len = avio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2254 len = pick_stream(s, rtsp_st, rt->recvbuf, len);
2255 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2256 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, NULL, s->pb, len);
2257 break;
2258 }
2259
2260 if (len == 0)
2261 return AVERROR_EOF;
2262
2263 return len;
2264 }
2265
2266 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
2267 {
2268 RTSPState *rt = s->priv_data;
2269 int ret, len;
2270 RTSPStream *rtsp_st, *first_queue_st = NULL;
2271 int64_t wait_end = 0;
2272
2273 if (rt->nb_byes == rt->nb_rtsp_streams)
2274 return AVERROR_EOF;
2275
2276 /* get next frames from the same RTP packet */
2277 if (rt->cur_transport_priv) {
2278 if (rt->transport == RTSP_TRANSPORT_RDT) {
2279 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2280 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2281 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2282 } else if (CONFIG_RTPDEC && rt->ts) {
2283 ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
2284 if (ret >= 0) {
2285 rt->recvbuf_pos += ret;
2286 ret = rt->recvbuf_pos < rt->recvbuf_len;
2287 }
2288 } else
2289 ret = -1;
2290 if (ret == 0) {
2291 rt->cur_transport_priv = NULL;
2292 return 0;
2293 } else if (ret == 1) {
2294 return 0;
2295 } else
2296 rt->cur_transport_priv = NULL;
2297 }
2298
2299 redo:
2300 if (rt->transport == RTSP_TRANSPORT_RTP) {
2301 int i;
2302 int64_t first_queue_time = 0;
2303 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2304 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2305 int64_t queue_time;
2306 if (!rtpctx)
2307 continue;
2308 queue_time = ff_rtp_queued_packet_time(rtpctx);
2309 if (queue_time && (queue_time - first_queue_time < 0 ||
2310 !first_queue_time)) {
2311 first_queue_time = queue_time;
2312 first_queue_st = rt->rtsp_streams[i];
2313 }
2314 }
2315 if (first_queue_time) {
2316 wait_end = first_queue_time + s->max_delay;
2317 } else {
2318 wait_end = 0;
2319 first_queue_st = NULL;
2320 }
2321 }
2322
2323 /* read next RTP packet */
2324 if (!rt->recvbuf) {
2325 rt->recvbuf = av_malloc(RECVBUF_SIZE);
2326 if (!rt->recvbuf)
2327 return AVERROR(ENOMEM);
2328 }
2329
2330 len = read_packet(s, &rtsp_st, first_queue_st, wait_end);
2331 if (len == AVERROR(EAGAIN) && first_queue_st &&
2332 rt->transport == RTSP_TRANSPORT_RTP) {
2333 av_log(s, AV_LOG_WARNING,
2334 "max delay reached. need to consume packet\n");
2335 rtsp_st = first_queue_st;
2336 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
2337 goto end;
2338 }
2339 if (len < 0)
2340 return len;
2341
2342 if (rt->transport == RTSP_TRANSPORT_RDT) {
2343 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2344 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2345 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2346 if (rtsp_st->feedback) {
2347 AVIOContext *pb = NULL;
2348 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
2349 pb = s->pb;
2350 ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
2351 }
2352 if (ret < 0) {
2353 /* Either bad packet, or a RTCP packet. Check if the
2354 * first_rtcp_ntp_time field was initialized. */
2355 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
2356 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
2357 /* first_rtcp_ntp_time has been initialized for this stream,
2358 * copy the same value to all other uninitialized streams,
2359 * in order to map their timestamp origin to the same ntp time
2360 * as this one. */
2361 int i;
2362 AVStream *st = NULL;
2363 if (rtsp_st->stream_index >= 0)
2364 st = s->streams[rtsp_st->stream_index];
2365 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2366 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
2367 AVStream *st2 = NULL;
2368 if (rt->rtsp_streams[i]->stream_index >= 0)
2369 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
2370 if (rtpctx2 && st && st2 &&
2371 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2372 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
2373 rtpctx2->rtcp_ts_offset = av_rescale_q(
2374 rtpctx->rtcp_ts_offset, st->time_base,
2375 st2->time_base);
2376 }
2377 }
2378 // Make real NTP start time available in AVFormatContext
2379 if (s->start_time_realtime == AV_NOPTS_VALUE) {
2380 s->start_time_realtime = ff_parse_ntp_time(rtpctx->first_rtcp_ntp_time) - NTP_OFFSET_US;
2381 if (rtpctx->st) {
2382 s->start_time_realtime -=
2383 av_rescale_q (rtpctx->rtcp_ts_offset, rtpctx->st->time_base, AV_TIME_BASE_Q);
2384 }
2385 }
2386 }
2387 if (ret == -RTCP_BYE) {
2388 rt->nb_byes++;
2389
2390 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
2391 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
2392
2393 if (rt->nb_byes == rt->nb_rtsp_streams)
2394 return AVERROR_EOF;
2395 }
2396 }
2397 } else if (CONFIG_RTPDEC && rt->ts) {
2398 ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
2399 if (ret >= 0) {
2400 if (ret < len) {
2401 rt->recvbuf_len = len;
2402 rt->recvbuf_pos = ret;
2403 rt->cur_transport_priv = rt->ts;
2404 return 1;
2405 } else {
2406 ret = 0;
2407 }
2408 }
2409 } else {
2410 return AVERROR_INVALIDDATA;
2411 }
2412 end:
2413 if (ret < 0)
2414 goto redo;
2415 if (ret == 1)
2416 /* more packets may follow, so we save the RTP context */
2417 rt->cur_transport_priv = rtsp_st->transport_priv;
2418
2419 return ret;
2420 }
2421 #endif /* CONFIG_RTPDEC */
2422
2423 #if CONFIG_SDP_DEMUXER
2424 7240 static int sdp_probe(const AVProbeData *p1)
2425 {
2426 7240 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2427
2428 /* we look for a line beginning "c=IN IP" */
2429
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572384 while (p < p_end && *p != '\0') {
2430
3/4
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✓ Branch 1 taken 139 times.
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✓ Branch 3 taken 568174 times.
1136487 if (sizeof("c=IN IP") - 1 < p_end - p &&
2431 568174 av_strstart(p, "c=IN IP", NULL))
2432 return AVPROBE_SCORE_EXTENSION;
2433
2434
4/4
✓ Branch 0 taken 92664891 times.
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92668060 while (p < p_end - 1 && *p != '\n') p++;
2435
2/2
✓ Branch 0 taken 3169 times.
✓ Branch 1 taken 565144 times.
568313 if (++p >= p_end)
2436 3169 break;
2437
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✓ Branch 0 taken 3370 times.
✓ Branch 1 taken 561774 times.
565144 if (*p == '\r')
2438 3370 p++;
2439 }
2440 7240 return 0;
2441 }
2442
2443 static void append_source_addrs(char *buf, int size, const char *name,
2444 int count, struct RTSPSource **addrs)
2445 {
2446 int i;
2447 if (!count)
2448 return;
2449 av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
2450 for (i = 1; i < count; i++)
2451 av_strlcatf(buf, size, ",%s", addrs[i]->addr);
2452 }
2453
2454 static int sdp_read_header(AVFormatContext *s)
2455 {
2456 RTSPState *rt = s->priv_data;
2457 RTSPStream *rtsp_st;
2458 int i, err;
2459 char url[MAX_URL_SIZE];
2460 AVBPrint bp;
2461
2462 if (!ff_network_init())
2463 return AVERROR(EIO);
2464
2465 if (s->max_delay < 0) /* Not set by the caller */
2466 s->max_delay = DEFAULT_REORDERING_DELAY;
2467 if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
2468 rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
2469
2470 /* read the whole sdp file */
2471 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
2472 err = avio_read_to_bprint(s->pb, &bp, INT_MAX);
2473 if (err < 0 ) {
2474 ff_network_close();
2475 av_bprint_finalize(&bp, NULL);
2476 return err;
2477 }
2478 err = ff_sdp_parse(s, bp.str);
2479 av_bprint_finalize(&bp, NULL);
2480 if (err) goto fail;
2481
2482 /* open each RTP stream */
2483 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2484 char namebuf[50];
2485 rtsp_st = rt->rtsp_streams[i];
2486
2487 if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
2488 AVDictionary *opts = map_to_opts(rt);
2489 char buf[MAX_URL_SIZE];
2490 const char *p;
2491
2492 err = getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip,
2493 sizeof(rtsp_st->sdp_ip),
2494 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2495 if (err) {
2496 av_log(s, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(err));
2497 err = AVERROR(EIO);
2498 av_dict_free(&opts);
2499 goto fail;
2500 }
2501 ff_url_join(url, sizeof(url), "rtp", NULL,
2502 namebuf, rtsp_st->sdp_port,
2503 "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
2504 rtsp_st->sdp_port, rtsp_st->sdp_ttl,
2505 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
2506 rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
2507
2508 p = strchr(s->url, '?');
2509 if (p && av_find_info_tag(buf, sizeof(buf), "localaddr", p))
2510 av_strlcatf(url, sizeof(url), "&localaddr=%s", buf);
2511 else if (rt->localaddr && rt->localaddr[0])
2512 av_strlcatf(url, sizeof(url), "&localaddr=%s", rt->localaddr);
2513 append_source_addrs(url, sizeof(url), "sources",
2514 rtsp_st->nb_include_source_addrs,
2515 rtsp_st->include_source_addrs);
2516 append_source_addrs(url, sizeof(url), "block",
2517 rtsp_st->nb_exclude_source_addrs,
2518 rtsp_st->exclude_source_addrs);
2519 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ,
2520 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
2521
2522 av_dict_free(&opts);
2523
2524 if (err < 0) {
2525 err = AVERROR_INVALIDDATA;
2526 goto fail;
2527 }
2528 }
2529 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2530 goto fail;
2531 }
2532 return 0;
2533 fail:
2534 ff_rtsp_close_streams(s);
2535 ff_network_close();
2536 return err;
2537 }
2538
2539 static int sdp_read_close(AVFormatContext *s)
2540 {
2541 ff_rtsp_close_streams(s);
2542 ff_network_close();
2543 return 0;
2544 }
2545
2546 static const AVClass sdp_demuxer_class = {
2547 .class_name = "SDP demuxer",
2548 .item_name = av_default_item_name,
2549 .option = sdp_options,
2550 .version = LIBAVUTIL_VERSION_INT,
2551 };
2552
2553 const FFInputFormat ff_sdp_demuxer = {
2554 .p.name = "sdp",
2555 .p.long_name = NULL_IF_CONFIG_SMALL("SDP"),
2556 .p.priv_class = &sdp_demuxer_class,
2557 .priv_data_size = sizeof(RTSPState),
2558 .read_probe = sdp_probe,
2559 .read_header = sdp_read_header,
2560 .read_packet = ff_rtsp_fetch_packet,
2561 .read_close = sdp_read_close,
2562 };
2563 #endif /* CONFIG_SDP_DEMUXER */
2564
2565 #if CONFIG_RTP_DEMUXER
2566 3876 static int rtp_probe(const AVProbeData *p)
2567 {
2568
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✗ Branch 1 not taken.
✓ Branch 2 taken 3876 times.
3876 if (av_strstart(p->filename, "rtp:", NULL))
2569 return AVPROBE_SCORE_MAX;
2570 3876 return 0;
2571 }
2572
2573 static int rtp_read_header(AVFormatContext *s)
2574 {
2575 uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
2576 char host[500], filters_buf[1000];
2577 int ret, port;
2578 URLContext* in = NULL;
2579 int payload_type;
2580 AVCodecParameters *par = NULL;
2581 struct sockaddr_storage addr;
2582 FFIOContext pb;
2583 socklen_t addrlen = sizeof(addr);
2584 RTSPState *rt = s->priv_data;
2585 const char *p;
2586 AVBPrint sdp;
2587 AVDictionary *opts = NULL;
2588
2589 if (!ff_network_init())
2590 return AVERROR(EIO);
2591
2592 opts = map_to_opts(rt);
2593 ret = ffurl_open_whitelist(&in, s->url, AVIO_FLAG_READ,
2594 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
2595 av_dict_free(&opts);
2596 if (ret)
2597 goto fail;
2598
2599 while (1) {
2600 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2601 if (ret == AVERROR(EAGAIN))
2602 continue;
2603 if (ret < 0)
2604 goto fail;
2605 if (ret < 12) {
2606 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
2607 continue;
2608 }
2609
2610 if ((recvbuf[0] & 0xc0) != 0x80) {
2611 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
2612 "received\n");
2613 continue;
2614 }
2615
2616 if (RTP_PT_IS_RTCP(recvbuf[1]))
2617 continue;
2618
2619 payload_type = recvbuf[1] & 0x7f;
2620 break;
2621 }
2622 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2623 ffurl_closep(&in);
2624
2625 par = avcodec_parameters_alloc();
2626 if (!par) {
2627 ret = AVERROR(ENOMEM);
2628 goto fail;
2629 }
2630
2631 if (ff_rtp_get_codec_info(par, payload_type)) {
2632 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2633 "without an SDP file describing it\n",
2634 payload_type);
2635 ret = AVERROR_INVALIDDATA;
2636 goto fail;
2637 }
2638 if (par->codec_type != AVMEDIA_TYPE_DATA) {
2639 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2640 "properly you need an SDP file "
2641 "describing it\n");
2642 }
2643
2644 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2645 NULL, 0, s->url);
2646
2647 av_bprint_init(&sdp, 0, AV_BPRINT_SIZE_UNLIMITED);
2648 av_bprintf(&sdp, "v=0\r\nc=IN IP%d %s\r\n",
2649 addr.ss_family == AF_INET ? 4 : 6, host);
2650
2651 p = strchr(s->url, '?');
2652 if (p) {
2653 static const char filters[][2][8] = { { "sources", "incl" },
2654 { "block", "excl" } };
2655 int i;
2656 char *q;
2657 for (i = 0; i < FF_ARRAY_ELEMS(filters); i++) {
2658 if (av_find_info_tag(filters_buf, sizeof(filters_buf), filters[i][0], p)) {
2659 q = filters_buf;
2660 while ((q = strchr(q, ',')) != NULL)
2661 *q = ' ';
2662 av_bprintf(&sdp, "a=source-filter:%s IN IP%d %s %s\r\n",
2663 filters[i][1],
2664 addr.ss_family == AF_INET ? 4 : 6, host,
2665 filters_buf);
2666 }
2667 }
2668 }
2669
2670 av_bprintf(&sdp, "m=%s %d RTP/AVP %d\r\n",
2671 par->codec_type == AVMEDIA_TYPE_DATA ? "application" :
2672 par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2673 port, payload_type);
2674 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp.str);
2675 if (!av_bprint_is_complete(&sdp))
2676 goto fail_nobuf;
2677 avcodec_parameters_free(&par);
2678
2679 ffio_init_read_context(&pb, sdp.str, sdp.len);
2680 s->pb = &pb.pub;
2681
2682 /* if sdp_read_header() fails then following ff_network_close() cancels out */
2683 /* ff_network_init() at the start of this function. Otherwise it cancels out */
2684 /* ff_network_init() inside sdp_read_header() */
2685 ff_network_close();
2686
2687 rt->media_type_mask = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1;
2688
2689 ret = sdp_read_header(s);
2690 s->pb = NULL;
2691 av_bprint_finalize(&sdp, NULL);
2692 return ret;
2693
2694 fail_nobuf:
2695 ret = AVERROR(ENOMEM);
2696 av_log(s, AV_LOG_ERROR, "rtp_read_header(): not enough buffer space for sdp-headers\n");
2697 av_bprint_finalize(&sdp, NULL);
2698 fail:
2699 avcodec_parameters_free(&par);
2700 ffurl_closep(&in);
2701 ff_network_close();
2702 return ret;
2703 }
2704
2705 static const AVClass rtp_demuxer_class = {
2706 .class_name = "RTP demuxer",
2707 .item_name = av_default_item_name,
2708 .option = rtp_options,
2709 .version = LIBAVUTIL_VERSION_INT,
2710 };
2711
2712 const FFInputFormat ff_rtp_demuxer = {
2713 .p.name = "rtp",
2714 .p.long_name = NULL_IF_CONFIG_SMALL("RTP input"),
2715 .p.flags = AVFMT_NOFILE,
2716 .p.priv_class = &rtp_demuxer_class,
2717 .priv_data_size = sizeof(RTSPState),
2718 .read_probe = rtp_probe,
2719 .read_header = rtp_read_header,
2720 .read_packet = ff_rtsp_fetch_packet,
2721 .read_close = sdp_read_close,
2722 };
2723 #endif /* CONFIG_RTP_DEMUXER */
2724