1 /*
2 * RTSP/SDP client
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "config_components.h"
23
24 #include "libavutil/avassert.h"
25 #include "libavutil/base64.h"
26 #include "libavutil/bprint.h"
27 #include "libavutil/avstring.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/parseutils.h"
31 #include "libavutil/random_seed.h"
32 #include "libavutil/dict.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/time.h"
35 #include "avformat.h"
36 #include "avio_internal.h"
37
38 #if HAVE_POLL_H
39 #include <poll.h>
40 #endif
41 #include "internal.h"
42 #include "network.h"
43 #include "os_support.h"
44 #include "http.h"
45 #include "rtsp.h"
46
47 #include "rtpdec.h"
48 #include "rtpproto.h"
49 #include "rdt.h"
50 #include "rtpdec_formats.h"
51 #include "rtpenc_chain.h"
52 #include "url.h"
53 #include "rtpenc.h"
54 #include "mpegts.h"
55 #include "version.h"
56
57 /* Default timeout values for read packet in seconds */
58 #define READ_PACKET_TIMEOUT_S 10
59 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
60 #define DEFAULT_REORDERING_DELAY 100000
61
62 #define OFFSET(x) offsetof(RTSPState, x)
63 #define DEC AV_OPT_FLAG_DECODING_PARAM
64 #define ENC AV_OPT_FLAG_ENCODING_PARAM
65
66 #define RTSP_FLAG_OPTS(name, longname) \
67 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
68 { "filter_src", "only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
69
70 #define RTSP_MEDIATYPE_OPTS(name, longname) \
71 { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
72 { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
73 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
74 { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }, \
75 { "subtitle", "Subtitle", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_SUBTITLE}, 0, 0, DEC, "allowed_media_types" }
76
77 #define COMMON_OPTS() \
78 { "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 }, \
79 { "buffer_size", "Underlying protocol send/receive buffer size", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC|ENC }, \
80 { "pkt_size", "Underlying protocol send packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = 1472 }, -1, INT_MAX, ENC } \
81
82
83 const AVOption ff_rtsp_options[] = {
84 { "initial_pause", "do not start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
85 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
86 { "rtsp_transport", "set RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
87 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
88 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
89 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
90 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
91 { "https", "HTTPS tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTPS )}, 0, 0, DEC, "rtsp_transport" },
92 RTSP_FLAG_OPTS("rtsp_flags", "set RTSP flags"),
93 { "listen", "wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" },
94 { "prefer_tcp", "try RTP via TCP first, if available", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_PREFER_TCP}, 0, 0, DEC|ENC, "rtsp_flags" },
95 { "satip_raw", "export raw MPEG-TS stream instead of demuxing", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_SATIP_RAW}, 0, 0, DEC, "rtsp_flags" },
96 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
97 { "min_port", "set minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
98 { "max_port", "set maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
99 { "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 },
100 { "timeout", "set timeout (in microseconds) of socket I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT64, {.i64 = 0}, INT_MIN, INT64_MAX, DEC },
101 COMMON_OPTS(),
102 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
103 { NULL },
104 };
105
106 static const AVOption sdp_options[] = {
107 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
108 { "custom_io", "use custom I/O", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" },
109 { "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, "rtsp_flags" },
110 { "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 },
111 { "localaddr", "local address", OFFSET(localaddr),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, \
112 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
113 COMMON_OPTS(),
114 { NULL },
115 };
116
117 static const AVOption rtp_options[] = {
118 RTSP_FLAG_OPTS("rtp_flags", "set RTP flags"),
119 { "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 },
120 { "localaddr", "local address", OFFSET(localaddr),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, \
121 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
122 COMMON_OPTS(),
123 { NULL },
124 };
125
126
map_to_opts(RTSPState * rt)127 static AVDictionary *map_to_opts(RTSPState *rt)
128 {
129 AVDictionary *opts = NULL;
130
131 av_dict_set_int(&opts, "buffer_size", rt->buffer_size, 0);
132 av_dict_set_int(&opts, "pkt_size", rt->pkt_size, 0);
133 if (rt->localaddr && rt->localaddr[0])
134 av_dict_set(&opts, "localaddr", rt->localaddr, 0);
135
136 return opts;
137 }
138
get_word_until_chars(char * buf,int buf_size,const char * sep,const char ** pp)139 static void get_word_until_chars(char *buf, int buf_size,
140 const char *sep, const char **pp)
141 {
142 const char *p;
143 char *q;
144
145 p = *pp;
146 p += strspn(p, SPACE_CHARS);
147 q = buf;
148 while (!strchr(sep, *p) && *p != '\0') {
149 if ((q - buf) < buf_size - 1)
150 *q++ = *p;
151 p++;
152 }
153 if (buf_size > 0)
154 *q = '\0';
155 *pp = p;
156 }
157
get_word_sep(char * buf,int buf_size,const char * sep,const char ** pp)158 static void get_word_sep(char *buf, int buf_size, const char *sep,
159 const char **pp)
160 {
161 if (**pp == '/') (*pp)++;
162 get_word_until_chars(buf, buf_size, sep, pp);
163 }
164
get_word(char * buf,int buf_size,const char ** pp)165 static void get_word(char *buf, int buf_size, const char **pp)
166 {
167 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
168 }
169
170 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
171 * and end time.
172 * Used for seeking in the rtp stream.
173 */
rtsp_parse_range_npt(const char * p,int64_t * start,int64_t * end)174 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
175 {
176 char buf[256];
177
178 p += strspn(p, SPACE_CHARS);
179 if (!av_stristart(p, "npt=", &p))
180 return;
181
182 *start = AV_NOPTS_VALUE;
183 *end = AV_NOPTS_VALUE;
184
185 get_word_sep(buf, sizeof(buf), "-", &p);
186 if (av_parse_time(start, buf, 1) < 0)
187 return;
188 if (*p == '-') {
189 p++;
190 get_word_sep(buf, sizeof(buf), "-", &p);
191 if (av_parse_time(end, buf, 1) < 0)
192 av_log(NULL, AV_LOG_DEBUG, "Failed to parse interval end specification '%s'\n", buf);
193 }
194 }
195
get_sockaddr(AVFormatContext * s,const char * buf,struct sockaddr_storage * sock)196 static int get_sockaddr(AVFormatContext *s,
197 const char *buf, struct sockaddr_storage *sock)
198 {
199 struct addrinfo hints = { 0 }, *ai = NULL;
200 int ret;
201
202 hints.ai_flags = AI_NUMERICHOST;
203 if ((ret = getaddrinfo(buf, NULL, &hints, &ai))) {
204 av_log(s, AV_LOG_ERROR, "getaddrinfo(%s): %s\n",
205 buf,
206 gai_strerror(ret));
207 return -1;
208 }
209 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
210 freeaddrinfo(ai);
211 return 0;
212 }
213
214 #if CONFIG_RTPDEC
init_rtp_handler(const RTPDynamicProtocolHandler * handler,RTSPStream * rtsp_st,AVStream * st)215 static void init_rtp_handler(const RTPDynamicProtocolHandler *handler,
216 RTSPStream *rtsp_st, AVStream *st)
217 {
218 AVCodecParameters *par = st ? st->codecpar : NULL;
219 if (!handler)
220 return;
221 if (par)
222 par->codec_id = handler->codec_id;
223 rtsp_st->dynamic_handler = handler;
224 if (st)
225 ffstream(st)->need_parsing = handler->need_parsing;
226 if (handler->priv_data_size) {
227 rtsp_st->dynamic_protocol_context = av_mallocz(handler->priv_data_size);
228 if (!rtsp_st->dynamic_protocol_context)
229 rtsp_st->dynamic_handler = NULL;
230 }
231 }
232
finalize_rtp_handler_init(AVFormatContext * s,RTSPStream * rtsp_st,AVStream * st)233 static void finalize_rtp_handler_init(AVFormatContext *s, RTSPStream *rtsp_st,
234 AVStream *st)
235 {
236 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init) {
237 int ret = rtsp_st->dynamic_handler->init(s, st ? st->index : -1,
238 rtsp_st->dynamic_protocol_context);
239 if (ret < 0) {
240 if (rtsp_st->dynamic_protocol_context) {
241 if (rtsp_st->dynamic_handler->close)
242 rtsp_st->dynamic_handler->close(
243 rtsp_st->dynamic_protocol_context);
244 av_free(rtsp_st->dynamic_protocol_context);
245 }
246 rtsp_st->dynamic_protocol_context = NULL;
247 rtsp_st->dynamic_handler = NULL;
248 }
249 }
250 }
251
252 #if CONFIG_RTSP_DEMUXER
init_satip_stream(AVFormatContext * s)253 static int init_satip_stream(AVFormatContext *s)
254 {
255 RTSPState *rt = s->priv_data;
256 RTSPStream *rtsp_st = av_mallocz(sizeof(RTSPStream));
257 if (!rtsp_st)
258 return AVERROR(ENOMEM);
259 dynarray_add(&rt->rtsp_streams,
260 &rt->nb_rtsp_streams, rtsp_st);
261
262 rtsp_st->sdp_payload_type = 33; // MP2T
263 av_strlcpy(rtsp_st->control_url,
264 rt->control_uri, sizeof(rtsp_st->control_url));
265
266 if (rt->rtsp_flags & RTSP_FLAG_SATIP_RAW) {
267 AVStream *st = avformat_new_stream(s, NULL);
268 if (!st)
269 return AVERROR(ENOMEM);
270 st->id = rt->nb_rtsp_streams - 1;
271 rtsp_st->stream_index = st->index;
272 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
273 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
274 } else {
275 rtsp_st->stream_index = -1;
276 init_rtp_handler(&ff_mpegts_dynamic_handler, rtsp_st, NULL);
277 finalize_rtp_handler_init(s, rtsp_st, NULL);
278 }
279 return 0;
280 }
281 #endif
282
283 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
sdp_parse_rtpmap(AVFormatContext * s,AVStream * st,RTSPStream * rtsp_st,int payload_type,const char * p)284 static int sdp_parse_rtpmap(AVFormatContext *s,
285 AVStream *st, RTSPStream *rtsp_st,
286 int payload_type, const char *p)
287 {
288 AVCodecParameters *par = st->codecpar;
289 char buf[256];
290 int i;
291 const AVCodecDescriptor *desc;
292 const char *c_name;
293
294 /* See if we can handle this kind of payload.
295 * The space should normally not be there but some Real streams or
296 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
297 * have a trailing space. */
298 get_word_sep(buf, sizeof(buf), "/ ", &p);
299 if (payload_type < RTP_PT_PRIVATE) {
300 /* We are in a standard case
301 * (from http://www.iana.org/assignments/rtp-parameters). */
302 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
303 }
304
305 if (par->codec_id == AV_CODEC_ID_NONE) {
306 const RTPDynamicProtocolHandler *handler =
307 ff_rtp_handler_find_by_name(buf, par->codec_type);
308 init_rtp_handler(handler, rtsp_st, st);
309 /* If no dynamic handler was found, check with the list of standard
310 * allocated types, if such a stream for some reason happens to
311 * use a private payload type. This isn't handled in rtpdec.c, since
312 * the format name from the rtpmap line never is passed into rtpdec. */
313 if (!rtsp_st->dynamic_handler)
314 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
315 }
316
317 desc = avcodec_descriptor_get(par->codec_id);
318 if (desc && desc->name)
319 c_name = desc->name;
320 else
321 c_name = "(null)";
322
323 get_word_sep(buf, sizeof(buf), "/", &p);
324 i = atoi(buf);
325 switch (par->codec_type) {
326 case AVMEDIA_TYPE_AUDIO:
327 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
328 par->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
329 par->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
330 if (i > 0) {
331 par->sample_rate = i;
332 avpriv_set_pts_info(st, 32, 1, par->sample_rate);
333 get_word_sep(buf, sizeof(buf), "/", &p);
334 i = atoi(buf);
335 if (i > 0)
336 av_channel_layout_default(&par->ch_layout, i);
337 }
338 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
339 par->sample_rate);
340 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
341 par->ch_layout.nb_channels);
342 break;
343 case AVMEDIA_TYPE_VIDEO:
344 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
345 if (i > 0)
346 avpriv_set_pts_info(st, 32, 1, i);
347 break;
348 default:
349 break;
350 }
351 finalize_rtp_handler_init(s, rtsp_st, st);
352 return 0;
353 }
354
355 /* parse the attribute line from the fmtp a line of an sdp response. This
356 * is broken out as a function because it is used in rtp_h264.c, which is
357 * forthcoming. */
ff_rtsp_next_attr_and_value(const char ** p,char * attr,int attr_size,char * value,int value_size)358 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
359 char *value, int value_size)
360 {
361 *p += strspn(*p, SPACE_CHARS);
362 if (**p) {
363 get_word_sep(attr, attr_size, "=", p);
364 if (**p == '=')
365 (*p)++;
366 get_word_sep(value, value_size, ";", p);
367 if (**p == ';')
368 (*p)++;
369 return 1;
370 }
371 return 0;
372 }
373
374 typedef struct SDPParseState {
375 /* SDP only */
376 struct sockaddr_storage default_ip;
377 int default_ttl;
378 int skip_media; ///< set if an unknown m= line occurs
379 int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
380 struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
381 int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
382 struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
383 int seen_rtpmap;
384 int seen_fmtp;
385 char delayed_fmtp[2048];
386 } SDPParseState;
387
copy_default_source_addrs(struct RTSPSource ** addrs,int count,struct RTSPSource *** dest,int * dest_count)388 static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
389 struct RTSPSource ***dest, int *dest_count)
390 {
391 RTSPSource *rtsp_src, *rtsp_src2;
392 int i;
393 for (i = 0; i < count; i++) {
394 rtsp_src = addrs[i];
395 rtsp_src2 = av_memdup(rtsp_src, sizeof(*rtsp_src));
396 if (!rtsp_src2)
397 continue;
398 dynarray_add(dest, dest_count, rtsp_src2);
399 }
400 }
401
parse_fmtp(AVFormatContext * s,RTSPState * rt,int payload_type,const char * line)402 static void parse_fmtp(AVFormatContext *s, RTSPState *rt,
403 int payload_type, const char *line)
404 {
405 int i;
406
407 for (i = 0; i < rt->nb_rtsp_streams; i++) {
408 RTSPStream *rtsp_st = rt->rtsp_streams[i];
409 if (rtsp_st->sdp_payload_type == payload_type &&
410 rtsp_st->dynamic_handler &&
411 rtsp_st->dynamic_handler->parse_sdp_a_line) {
412 rtsp_st->dynamic_handler->parse_sdp_a_line(s, rtsp_st->stream_index,
413 rtsp_st->dynamic_protocol_context, line);
414 }
415 }
416 }
417
sdp_parse_line(AVFormatContext * s,SDPParseState * s1,int letter,const char * buf)418 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
419 int letter, const char *buf)
420 {
421 RTSPState *rt = s->priv_data;
422 char buf1[64], st_type[64];
423 const char *p;
424 enum AVMediaType codec_type;
425 int payload_type;
426 AVStream *st;
427 RTSPStream *rtsp_st;
428 RTSPSource *rtsp_src;
429 struct sockaddr_storage sdp_ip;
430 int ttl;
431
432 av_log(s, AV_LOG_TRACE, "sdp: %c='%s'\n", letter, buf);
433
434 p = buf;
435 if (s1->skip_media && letter != 'm')
436 return;
437 switch (letter) {
438 case 'c':
439 get_word(buf1, sizeof(buf1), &p);
440 if (strcmp(buf1, "IN") != 0)
441 return;
442 get_word(buf1, sizeof(buf1), &p);
443 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
444 return;
445 get_word_sep(buf1, sizeof(buf1), "/", &p);
446 if (get_sockaddr(s, buf1, &sdp_ip))
447 return;
448 ttl = 16;
449 if (*p == '/') {
450 p++;
451 get_word_sep(buf1, sizeof(buf1), "/", &p);
452 ttl = atoi(buf1);
453 }
454 if (s->nb_streams == 0) {
455 s1->default_ip = sdp_ip;
456 s1->default_ttl = ttl;
457 } else {
458 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
459 rtsp_st->sdp_ip = sdp_ip;
460 rtsp_st->sdp_ttl = ttl;
461 }
462 break;
463 case 's':
464 av_dict_set(&s->metadata, "title", p, 0);
465 break;
466 case 'i':
467 if (s->nb_streams == 0) {
468 av_dict_set(&s->metadata, "comment", p, 0);
469 break;
470 }
471 break;
472 case 'm':
473 /* new stream */
474 s1->skip_media = 0;
475 s1->seen_fmtp = 0;
476 s1->seen_rtpmap = 0;
477 codec_type = AVMEDIA_TYPE_UNKNOWN;
478 get_word(st_type, sizeof(st_type), &p);
479 if (!strcmp(st_type, "audio")) {
480 codec_type = AVMEDIA_TYPE_AUDIO;
481 } else if (!strcmp(st_type, "video")) {
482 codec_type = AVMEDIA_TYPE_VIDEO;
483 } else if (!strcmp(st_type, "application")) {
484 codec_type = AVMEDIA_TYPE_DATA;
485 } else if (!strcmp(st_type, "text")) {
486 codec_type = AVMEDIA_TYPE_SUBTITLE;
487 }
488 if (codec_type == AVMEDIA_TYPE_UNKNOWN ||
489 !(rt->media_type_mask & (1 << codec_type)) ||
490 rt->nb_rtsp_streams >= s->max_streams
491 ) {
492 s1->skip_media = 1;
493 return;
494 }
495 rtsp_st = av_mallocz(sizeof(RTSPStream));
496 if (!rtsp_st)
497 return;
498 rtsp_st->stream_index = -1;
499 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
500
501 rtsp_st->sdp_ip = s1->default_ip;
502 rtsp_st->sdp_ttl = s1->default_ttl;
503
504 copy_default_source_addrs(s1->default_include_source_addrs,
505 s1->nb_default_include_source_addrs,
506 &rtsp_st->include_source_addrs,
507 &rtsp_st->nb_include_source_addrs);
508 copy_default_source_addrs(s1->default_exclude_source_addrs,
509 s1->nb_default_exclude_source_addrs,
510 &rtsp_st->exclude_source_addrs,
511 &rtsp_st->nb_exclude_source_addrs);
512
513 get_word(buf1, sizeof(buf1), &p); /* port */
514 rtsp_st->sdp_port = atoi(buf1);
515
516 get_word(buf1, sizeof(buf1), &p); /* protocol */
517 if (!strcmp(buf1, "udp"))
518 rt->transport = RTSP_TRANSPORT_RAW;
519 else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
520 rtsp_st->feedback = 1;
521
522 /* XXX: handle list of formats */
523 get_word(buf1, sizeof(buf1), &p); /* format list */
524 rtsp_st->sdp_payload_type = atoi(buf1);
525
526 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
527 /* no corresponding stream */
528 if (rt->transport == RTSP_TRANSPORT_RAW) {
529 if (CONFIG_RTPDEC && !rt->ts)
530 rt->ts = avpriv_mpegts_parse_open(s);
531 } else {
532 const RTPDynamicProtocolHandler *handler;
533 handler = ff_rtp_handler_find_by_id(
534 rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
535 init_rtp_handler(handler, rtsp_st, NULL);
536 finalize_rtp_handler_init(s, rtsp_st, NULL);
537 }
538 } else if (rt->server_type == RTSP_SERVER_WMS &&
539 codec_type == AVMEDIA_TYPE_DATA) {
540 /* RTX stream, a stream that carries all the other actual
541 * audio/video streams. Don't expose this to the callers. */
542 } else {
543 st = avformat_new_stream(s, NULL);
544 if (!st)
545 return;
546 st->id = rt->nb_rtsp_streams - 1;
547 rtsp_st->stream_index = st->index;
548 st->codecpar->codec_type = codec_type;
549 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
550 const RTPDynamicProtocolHandler *handler;
551 /* if standard payload type, we can find the codec right now */
552 ff_rtp_get_codec_info(st->codecpar, rtsp_st->sdp_payload_type);
553 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
554 st->codecpar->sample_rate > 0)
555 avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
556 /* Even static payload types may need a custom depacketizer */
557 handler = ff_rtp_handler_find_by_id(
558 rtsp_st->sdp_payload_type, st->codecpar->codec_type);
559 init_rtp_handler(handler, rtsp_st, st);
560 finalize_rtp_handler_init(s, rtsp_st, st);
561 }
562 if (rt->default_lang[0])
563 av_dict_set(&st->metadata, "language", rt->default_lang, 0);
564 }
565 /* put a default control url */
566 av_strlcpy(rtsp_st->control_url, rt->control_uri,
567 sizeof(rtsp_st->control_url));
568 break;
569 case 'a':
570 if (av_strstart(p, "control:", &p)) {
571 if (rt->nb_rtsp_streams == 0) {
572 if (!strncmp(p, "rtsp://", 7))
573 av_strlcpy(rt->control_uri, p,
574 sizeof(rt->control_uri));
575 } else {
576 char proto[32];
577 /* get the control url */
578 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
579
580 /* XXX: may need to add full url resolution */
581 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
582 NULL, NULL, 0, p);
583 if (proto[0] == '\0') {
584 /* relative control URL */
585 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
586 av_strlcat(rtsp_st->control_url, "/",
587 sizeof(rtsp_st->control_url));
588 av_strlcat(rtsp_st->control_url, p,
589 sizeof(rtsp_st->control_url));
590 } else
591 av_strlcpy(rtsp_st->control_url, p,
592 sizeof(rtsp_st->control_url));
593 }
594 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
595 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
596 get_word(buf1, sizeof(buf1), &p);
597 payload_type = atoi(buf1);
598 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
599 if (rtsp_st->stream_index >= 0) {
600 st = s->streams[rtsp_st->stream_index];
601 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
602 }
603 s1->seen_rtpmap = 1;
604 if (s1->seen_fmtp) {
605 parse_fmtp(s, rt, payload_type, s1->delayed_fmtp);
606 }
607 } else if (av_strstart(p, "fmtp:", &p) ||
608 av_strstart(p, "framesize:", &p)) {
609 // let dynamic protocol handlers have a stab at the line.
610 get_word(buf1, sizeof(buf1), &p);
611 payload_type = atoi(buf1);
612 if (s1->seen_rtpmap) {
613 parse_fmtp(s, rt, payload_type, buf);
614 } else {
615 s1->seen_fmtp = 1;
616 av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp));
617 }
618 } else if (av_strstart(p, "ssrc:", &p) && s->nb_streams > 0) {
619 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
620 get_word(buf1, sizeof(buf1), &p);
621 rtsp_st->ssrc = strtoll(buf1, NULL, 10);
622 } else if (av_strstart(p, "range:", &p)) {
623 int64_t start, end;
624
625 // this is so that seeking on a streamed file can work.
626 rtsp_parse_range_npt(p, &start, &end);
627 s->start_time = start;
628 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
629 s->duration = (end == AV_NOPTS_VALUE) ?
630 AV_NOPTS_VALUE : end - start;
631 } else if (av_strstart(p, "lang:", &p)) {
632 if (s->nb_streams > 0) {
633 get_word(buf1, sizeof(buf1), &p);
634 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
635 if (rtsp_st->stream_index >= 0) {
636 st = s->streams[rtsp_st->stream_index];
637 av_dict_set(&st->metadata, "language", buf1, 0);
638 }
639 } else
640 get_word(rt->default_lang, sizeof(rt->default_lang), &p);
641 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
642 if (atoi(p) == 1)
643 rt->transport = RTSP_TRANSPORT_RDT;
644 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
645 s->nb_streams > 0) {
646 st = s->streams[s->nb_streams - 1];
647 st->codecpar->sample_rate = atoi(p);
648 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
649 // RFC 4568
650 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
651 get_word(buf1, sizeof(buf1), &p); // ignore tag
652 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
653 p += strspn(p, SPACE_CHARS);
654 if (av_strstart(p, "inline:", &p))
655 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
656 } else if (av_strstart(p, "source-filter:", &p)) {
657 int exclude = 0;
658 get_word(buf1, sizeof(buf1), &p);
659 if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
660 return;
661 exclude = !strcmp(buf1, "excl");
662
663 get_word(buf1, sizeof(buf1), &p);
664 if (strcmp(buf1, "IN") != 0)
665 return;
666 get_word(buf1, sizeof(buf1), &p);
667 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
668 return;
669 // not checking that the destination address actually matches or is wildcard
670 get_word(buf1, sizeof(buf1), &p);
671
672 while (*p != '\0') {
673 rtsp_src = av_mallocz(sizeof(*rtsp_src));
674 if (!rtsp_src)
675 return;
676 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
677 if (exclude) {
678 if (s->nb_streams == 0) {
679 dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
680 } else {
681 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
682 dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
683 }
684 } else {
685 if (s->nb_streams == 0) {
686 dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
687 } else {
688 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
689 dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
690 }
691 }
692 }
693 } else {
694 if (rt->server_type == RTSP_SERVER_WMS)
695 ff_wms_parse_sdp_a_line(s, p);
696 if (s->nb_streams > 0) {
697 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
698
699 if (rt->server_type == RTSP_SERVER_REAL)
700 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
701
702 if (rtsp_st->dynamic_handler &&
703 rtsp_st->dynamic_handler->parse_sdp_a_line)
704 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
705 rtsp_st->stream_index,
706 rtsp_st->dynamic_protocol_context, buf);
707 }
708 }
709 break;
710 }
711 }
712
ff_sdp_parse(AVFormatContext * s,const char * content)713 int ff_sdp_parse(AVFormatContext *s, const char *content)
714 {
715 const char *p;
716 int letter, i;
717 char buf[SDP_MAX_SIZE], *q;
718 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
719
720 p = content;
721 for (;;) {
722 p += strspn(p, SPACE_CHARS);
723 letter = *p;
724 if (letter == '\0')
725 break;
726 p++;
727 if (*p != '=')
728 goto next_line;
729 p++;
730 /* get the content */
731 q = buf;
732 while (*p != '\n' && *p != '\r' && *p != '\0') {
733 if ((q - buf) < sizeof(buf) - 1)
734 *q++ = *p;
735 p++;
736 }
737 *q = '\0';
738 sdp_parse_line(s, s1, letter, buf);
739 next_line:
740 while (*p != '\n' && *p != '\0')
741 p++;
742 if (*p == '\n')
743 p++;
744 }
745
746 for (i = 0; i < s1->nb_default_include_source_addrs; i++)
747 av_freep(&s1->default_include_source_addrs[i]);
748 av_freep(&s1->default_include_source_addrs);
749 for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
750 av_freep(&s1->default_exclude_source_addrs[i]);
751 av_freep(&s1->default_exclude_source_addrs);
752
753 return 0;
754 }
755 #endif /* CONFIG_RTPDEC */
756
ff_rtsp_undo_setup(AVFormatContext * s,int send_packets)757 void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
758 {
759 RTSPState *rt = s->priv_data;
760 int i;
761
762 for (i = 0; i < rt->nb_rtsp_streams; i++) {
763 RTSPStream *rtsp_st = rt->rtsp_streams[i];
764 if (!rtsp_st)
765 continue;
766 if (rtsp_st->transport_priv) {
767 if (s->oformat) {
768 AVFormatContext *rtpctx = rtsp_st->transport_priv;
769 av_write_trailer(rtpctx);
770 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
771 if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
772 ff_rtsp_tcp_write_packet(s, rtsp_st);
773 ffio_free_dyn_buf(&rtpctx->pb);
774 } else {
775 avio_closep(&rtpctx->pb);
776 }
777 avformat_free_context(rtpctx);
778 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
779 ff_rdt_parse_close(rtsp_st->transport_priv);
780 else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
781 ff_rtp_parse_close(rtsp_st->transport_priv);
782 }
783 rtsp_st->transport_priv = NULL;
784 ffurl_closep(&rtsp_st->rtp_handle);
785 }
786 }
787
788 /* close and free RTSP streams */
ff_rtsp_close_streams(AVFormatContext * s)789 void ff_rtsp_close_streams(AVFormatContext *s)
790 {
791 RTSPState *rt = s->priv_data;
792 int i, j;
793 RTSPStream *rtsp_st;
794
795 ff_rtsp_undo_setup(s, 0);
796 for (i = 0; i < rt->nb_rtsp_streams; i++) {
797 rtsp_st = rt->rtsp_streams[i];
798 if (rtsp_st) {
799 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) {
800 if (rtsp_st->dynamic_handler->close)
801 rtsp_st->dynamic_handler->close(
802 rtsp_st->dynamic_protocol_context);
803 av_free(rtsp_st->dynamic_protocol_context);
804 }
805 for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
806 av_freep(&rtsp_st->include_source_addrs[j]);
807 av_freep(&rtsp_st->include_source_addrs);
808 for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
809 av_freep(&rtsp_st->exclude_source_addrs[j]);
810 av_freep(&rtsp_st->exclude_source_addrs);
811
812 av_freep(&rtsp_st);
813 }
814 }
815 av_freep(&rt->rtsp_streams);
816 if (rt->asf_ctx) {
817 avformat_close_input(&rt->asf_ctx);
818 }
819 if (CONFIG_RTPDEC && rt->ts)
820 avpriv_mpegts_parse_close(rt->ts);
821 av_freep(&rt->p);
822 av_freep(&rt->recvbuf);
823 }
824
ff_rtsp_open_transport_ctx(AVFormatContext * s,RTSPStream * rtsp_st)825 int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
826 {
827 RTSPState *rt = s->priv_data;
828 AVStream *st = NULL;
829 int reordering_queue_size = rt->reordering_queue_size;
830 if (reordering_queue_size < 0) {
831 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
832 reordering_queue_size = 0;
833 else
834 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
835 }
836
837 /* open the RTP context */
838 if (rtsp_st->stream_index >= 0)
839 st = s->streams[rtsp_st->stream_index];
840 if (!st)
841 s->ctx_flags |= AVFMTCTX_NOHEADER;
842
843 if (CONFIG_RTSP_MUXER && s->oformat && st) {
844 int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
845 s, st, rtsp_st->rtp_handle,
846 rt->pkt_size,
847 rtsp_st->stream_index);
848 /* Ownership of rtp_handle is passed to the rtp mux context */
849 rtsp_st->rtp_handle = NULL;
850 if (ret < 0)
851 return ret;
852 st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
853 } else if (rt->transport == RTSP_TRANSPORT_RAW) {
854 return 0; // Don't need to open any parser here
855 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT && st)
856 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
857 rtsp_st->dynamic_protocol_context,
858 rtsp_st->dynamic_handler);
859 else if (CONFIG_RTPDEC)
860 rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
861 rtsp_st->sdp_payload_type,
862 reordering_queue_size);
863
864 if (!rtsp_st->transport_priv) {
865 return AVERROR(ENOMEM);
866 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP &&
867 s->iformat) {
868 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
869 rtpctx->ssrc = rtsp_st->ssrc;
870 if (rtsp_st->dynamic_handler) {
871 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
872 rtsp_st->dynamic_protocol_context,
873 rtsp_st->dynamic_handler);
874 }
875 if (rtsp_st->crypto_suite[0])
876 ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
877 rtsp_st->crypto_suite,
878 rtsp_st->crypto_params);
879 }
880
881 return 0;
882 }
883
884 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
rtsp_parse_range(int * min_ptr,int * max_ptr,const char ** pp)885 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
886 {
887 const char *q;
888 char *p;
889 int v;
890
891 q = *pp;
892 q += strspn(q, SPACE_CHARS);
893 v = strtol(q, &p, 10);
894 if (*p == '-') {
895 p++;
896 *min_ptr = v;
897 v = strtol(p, &p, 10);
898 *max_ptr = v;
899 } else {
900 *min_ptr = v;
901 *max_ptr = v;
902 }
903 *pp = p;
904 }
905
906 /* XXX: only one transport specification is parsed */
rtsp_parse_transport(AVFormatContext * s,RTSPMessageHeader * reply,const char * p)907 static void rtsp_parse_transport(AVFormatContext *s,
908 RTSPMessageHeader *reply, const char *p)
909 {
910 char transport_protocol[16];
911 char profile[16];
912 char lower_transport[16];
913 char parameter[16];
914 RTSPTransportField *th;
915 char buf[256];
916
917 reply->nb_transports = 0;
918
919 for (;;) {
920 p += strspn(p, SPACE_CHARS);
921 if (*p == '\0')
922 break;
923
924 th = &reply->transports[reply->nb_transports];
925
926 get_word_sep(transport_protocol, sizeof(transport_protocol),
927 "/", &p);
928 if (!av_strcasecmp (transport_protocol, "rtp")) {
929 get_word_sep(profile, sizeof(profile), "/;,", &p);
930 lower_transport[0] = '\0';
931 /* rtp/avp/<protocol> */
932 if (*p == '/') {
933 get_word_sep(lower_transport, sizeof(lower_transport),
934 ";,", &p);
935 }
936 th->transport = RTSP_TRANSPORT_RTP;
937 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
938 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
939 /* x-pn-tng/<protocol> */
940 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
941 profile[0] = '\0';
942 th->transport = RTSP_TRANSPORT_RDT;
943 } else if (!av_strcasecmp(transport_protocol, "raw")) {
944 get_word_sep(profile, sizeof(profile), "/;,", &p);
945 lower_transport[0] = '\0';
946 /* raw/raw/<protocol> */
947 if (*p == '/') {
948 get_word_sep(lower_transport, sizeof(lower_transport),
949 ";,", &p);
950 }
951 th->transport = RTSP_TRANSPORT_RAW;
952 } else {
953 break;
954 }
955 if (!av_strcasecmp(lower_transport, "TCP"))
956 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
957 else
958 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
959
960 if (*p == ';')
961 p++;
962 /* get each parameter */
963 while (*p != '\0' && *p != ',') {
964 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
965 if (!strcmp(parameter, "port")) {
966 if (*p == '=') {
967 p++;
968 rtsp_parse_range(&th->port_min, &th->port_max, &p);
969 }
970 } else if (!strcmp(parameter, "client_port")) {
971 if (*p == '=') {
972 p++;
973 rtsp_parse_range(&th->client_port_min,
974 &th->client_port_max, &p);
975 }
976 } else if (!strcmp(parameter, "server_port")) {
977 if (*p == '=') {
978 p++;
979 rtsp_parse_range(&th->server_port_min,
980 &th->server_port_max, &p);
981 }
982 } else if (!strcmp(parameter, "interleaved")) {
983 if (*p == '=') {
984 p++;
985 rtsp_parse_range(&th->interleaved_min,
986 &th->interleaved_max, &p);
987 }
988 } else if (!strcmp(parameter, "multicast")) {
989 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
990 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
991 } else if (!strcmp(parameter, "ttl")) {
992 if (*p == '=') {
993 char *end;
994 p++;
995 th->ttl = strtol(p, &end, 10);
996 p = end;
997 }
998 } else if (!strcmp(parameter, "destination")) {
999 if (*p == '=') {
1000 p++;
1001 get_word_sep(buf, sizeof(buf), ";,", &p);
1002 get_sockaddr(s, buf, &th->destination);
1003 }
1004 } else if (!strcmp(parameter, "source")) {
1005 if (*p == '=') {
1006 p++;
1007 get_word_sep(buf, sizeof(buf), ";,", &p);
1008 av_strlcpy(th->source, buf, sizeof(th->source));
1009 }
1010 } else if (!strcmp(parameter, "mode")) {
1011 if (*p == '=') {
1012 p++;
1013 get_word_sep(buf, sizeof(buf), ";, ", &p);
1014 if (!strcmp(buf, "record") ||
1015 !strcmp(buf, "receive"))
1016 th->mode_record = 1;
1017 }
1018 }
1019
1020 while (*p != ';' && *p != '\0' && *p != ',')
1021 p++;
1022 if (*p == ';')
1023 p++;
1024 }
1025 if (*p == ',')
1026 p++;
1027
1028 reply->nb_transports++;
1029 if (reply->nb_transports >= RTSP_MAX_TRANSPORTS)
1030 break;
1031 }
1032 }
1033
handle_rtp_info(RTSPState * rt,const char * url,uint32_t seq,uint32_t rtptime)1034 static void handle_rtp_info(RTSPState *rt, const char *url,
1035 uint32_t seq, uint32_t rtptime)
1036 {
1037 int i;
1038 if (!rtptime || !url[0])
1039 return;
1040 if (rt->transport != RTSP_TRANSPORT_RTP)
1041 return;
1042 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1043 RTSPStream *rtsp_st = rt->rtsp_streams[i];
1044 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1045 if (!rtpctx)
1046 continue;
1047 if (!strcmp(rtsp_st->control_url, url)) {
1048 rtpctx->base_timestamp = rtptime;
1049 break;
1050 }
1051 }
1052 }
1053
rtsp_parse_rtp_info(RTSPState * rt,const char * p)1054 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
1055 {
1056 int read = 0;
1057 char key[20], value[MAX_URL_SIZE], url[MAX_URL_SIZE] = "";
1058 uint32_t seq = 0, rtptime = 0;
1059
1060 for (;;) {
1061 p += strspn(p, SPACE_CHARS);
1062 if (!*p)
1063 break;
1064 get_word_sep(key, sizeof(key), "=", &p);
1065 if (*p != '=')
1066 break;
1067 p++;
1068 get_word_sep(value, sizeof(value), ";, ", &p);
1069 read++;
1070 if (!strcmp(key, "url"))
1071 av_strlcpy(url, value, sizeof(url));
1072 else if (!strcmp(key, "seq"))
1073 seq = strtoul(value, NULL, 10);
1074 else if (!strcmp(key, "rtptime"))
1075 rtptime = strtoul(value, NULL, 10);
1076 if (*p == ',') {
1077 handle_rtp_info(rt, url, seq, rtptime);
1078 url[0] = '\0';
1079 seq = rtptime = 0;
1080 read = 0;
1081 }
1082 if (*p)
1083 p++;
1084 }
1085 if (read > 0)
1086 handle_rtp_info(rt, url, seq, rtptime);
1087 }
1088
ff_rtsp_parse_line(AVFormatContext * s,RTSPMessageHeader * reply,const char * buf,RTSPState * rt,const char * method)1089 void ff_rtsp_parse_line(AVFormatContext *s,
1090 RTSPMessageHeader *reply, const char *buf,
1091 RTSPState *rt, const char *method)
1092 {
1093 const char *p;
1094
1095 /* NOTE: we do case independent match for broken servers */
1096 p = buf;
1097 if (av_stristart(p, "Session:", &p)) {
1098 int t;
1099 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
1100 if (av_stristart(p, ";timeout=", &p) &&
1101 (t = strtol(p, NULL, 10)) > 0) {
1102 reply->timeout = t;
1103 }
1104 } else if (av_stristart(p, "Content-Length:", &p)) {
1105 reply->content_length = strtol(p, NULL, 10);
1106 } else if (av_stristart(p, "Transport:", &p)) {
1107 rtsp_parse_transport(s, reply, p);
1108 } else if (av_stristart(p, "CSeq:", &p)) {
1109 reply->seq = strtol(p, NULL, 10);
1110 } else if (av_stristart(p, "Range:", &p)) {
1111 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1112 } else if (av_stristart(p, "RealChallenge1:", &p)) {
1113 p += strspn(p, SPACE_CHARS);
1114 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1115 } else if (av_stristart(p, "Server:", &p)) {
1116 p += strspn(p, SPACE_CHARS);
1117 av_strlcpy(reply->server, p, sizeof(reply->server));
1118 } else if (av_stristart(p, "Notice:", &p) ||
1119 av_stristart(p, "X-Notice:", &p)) {
1120 reply->notice = strtol(p, NULL, 10);
1121 } else if (av_stristart(p, "Location:", &p)) {
1122 p += strspn(p, SPACE_CHARS);
1123 av_strlcpy(reply->location, p , sizeof(reply->location));
1124 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
1125 p += strspn(p, SPACE_CHARS);
1126 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
1127 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1128 p += strspn(p, SPACE_CHARS);
1129 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1130 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1131 p += strspn(p, SPACE_CHARS);
1132 if (method && !strcmp(method, "DESCRIBE"))
1133 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1134 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
1135 p += strspn(p, SPACE_CHARS);
1136 if (method && !strcmp(method, "PLAY"))
1137 rtsp_parse_rtp_info(rt, p);
1138 } else if (av_stristart(p, "Public:", &p) && rt) {
1139 if (strstr(p, "GET_PARAMETER") &&
1140 method && !strcmp(method, "OPTIONS"))
1141 rt->get_parameter_supported = 1;
1142 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
1143 p += strspn(p, SPACE_CHARS);
1144 rt->accept_dynamic_rate = atoi(p);
1145 } else if (av_stristart(p, "Content-Type:", &p)) {
1146 p += strspn(p, SPACE_CHARS);
1147 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1148 } else if (av_stristart(p, "com.ses.streamID:", &p)) {
1149 p += strspn(p, SPACE_CHARS);
1150 av_strlcpy(reply->stream_id, p, sizeof(reply->stream_id));
1151 }
1152 }
1153
1154 /* skip a RTP/TCP interleaved packet */
ff_rtsp_skip_packet(AVFormatContext * s)1155 int ff_rtsp_skip_packet(AVFormatContext *s)
1156 {
1157 RTSPState *rt = s->priv_data;
1158 int ret, len, len1;
1159 uint8_t buf[MAX_URL_SIZE];
1160
1161 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1162 if (ret != 3)
1163 return ret < 0 ? ret : AVERROR(EIO);
1164 len = AV_RB16(buf + 1);
1165
1166 av_log(s, AV_LOG_TRACE, "skipping RTP packet len=%d\n", len);
1167
1168 /* skip payload */
1169 while (len > 0) {
1170 len1 = len;
1171 if (len1 > sizeof(buf))
1172 len1 = sizeof(buf);
1173 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1174 if (ret != len1)
1175 return ret < 0 ? ret : AVERROR(EIO);
1176 len -= len1;
1177 }
1178
1179 return 0;
1180 }
1181
ff_rtsp_read_reply(AVFormatContext * s,RTSPMessageHeader * reply,unsigned char ** content_ptr,int return_on_interleaved_data,const char * method)1182 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
1183 unsigned char **content_ptr,
1184 int return_on_interleaved_data, const char *method)
1185 {
1186 RTSPState *rt = s->priv_data;
1187 char buf[MAX_URL_SIZE], buf1[MAX_URL_SIZE], *q;
1188 unsigned char ch;
1189 const char *p;
1190 int ret, content_length, line_count, request;
1191 unsigned char *content;
1192
1193 start:
1194 line_count = 0;
1195 request = 0;
1196 content = NULL;
1197 memset(reply, 0, sizeof(*reply));
1198
1199 /* parse reply (XXX: use buffers) */
1200 rt->last_reply[0] = '\0';
1201 for (;;) {
1202 q = buf;
1203 for (;;) {
1204 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1205 av_log(s, AV_LOG_TRACE, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1206 if (ret != 1)
1207 return ret < 0 ? ret : AVERROR(EIO);
1208 if (ch == '\n')
1209 break;
1210 if (ch == '$' && q == buf) {
1211 if (return_on_interleaved_data) {
1212 return 1;
1213 } else {
1214 ret = ff_rtsp_skip_packet(s);
1215 if (ret < 0)
1216 return ret;
1217 }
1218 } else if (ch != '\r') {
1219 if ((q - buf) < sizeof(buf) - 1)
1220 *q++ = ch;
1221 }
1222 }
1223 *q = '\0';
1224
1225 av_log(s, AV_LOG_TRACE, "line='%s'\n", buf);
1226
1227 /* test if last line */
1228 if (buf[0] == '\0')
1229 break;
1230 p = buf;
1231 if (line_count == 0) {
1232 /* get reply code */
1233 get_word(buf1, sizeof(buf1), &p);
1234 if (!strncmp(buf1, "RTSP/", 5)) {
1235 get_word(buf1, sizeof(buf1), &p);
1236 reply->status_code = atoi(buf1);
1237 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1238 } else {
1239 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1240 get_word(buf1, sizeof(buf1), &p); // object
1241 request = 1;
1242 }
1243 } else {
1244 ff_rtsp_parse_line(s, reply, p, rt, method);
1245 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1246 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1247 }
1248 line_count++;
1249 }
1250
1251 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1252 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1253
1254 content_length = reply->content_length;
1255 if (content_length > 0) {
1256 /* leave some room for a trailing '\0' (useful for simple parsing) */
1257 content = av_malloc(content_length + 1);
1258 if (!content)
1259 return AVERROR(ENOMEM);
1260 if ((ret = ffurl_read_complete(rt->rtsp_hd, content, content_length)) != content_length) {
1261 av_freep(&content);
1262 return ret < 0 ? ret : AVERROR(EIO);
1263 }
1264 content[content_length] = '\0';
1265 }
1266 if (content_ptr)
1267 *content_ptr = content;
1268 else
1269 av_freep(&content);
1270
1271 if (request) {
1272 char buf[MAX_URL_SIZE];
1273 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1274 const char* ptr = buf;
1275
1276 if (!strcmp(reply->reason, "OPTIONS") ||
1277 !strcmp(reply->reason, "GET_PARAMETER")) {
1278 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1279 if (reply->seq)
1280 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1281 if (reply->session_id[0])
1282 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1283 reply->session_id);
1284 } else {
1285 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1286 }
1287 av_strlcat(buf, "\r\n", sizeof(buf));
1288
1289 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1290 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1291 ptr = base64buf;
1292 }
1293 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1294
1295 rt->last_cmd_time = av_gettime_relative();
1296 /* Even if the request from the server had data, it is not the data
1297 * that the caller wants or expects. The memory could also be leaked
1298 * if the actual following reply has content data. */
1299 if (content_ptr)
1300 av_freep(content_ptr);
1301 /* If method is set, this is called from ff_rtsp_send_cmd,
1302 * where a reply to exactly this request is awaited. For
1303 * callers from within packet receiving, we just want to
1304 * return to the caller and go back to receiving packets. */
1305 if (method)
1306 goto start;
1307 return 0;
1308 }
1309
1310 if (rt->seq != reply->seq) {
1311 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1312 rt->seq, reply->seq);
1313 }
1314
1315 /* EOS */
1316 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1317 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1318 reply->notice == 2306 /* Continuous Feed Terminated */) {
1319 rt->state = RTSP_STATE_IDLE;
1320 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1321 return AVERROR(EIO); /* data or server error */
1322 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1323 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1324 return AVERROR(EPERM);
1325
1326 return 0;
1327 }
1328
1329 /**
1330 * Send a command to the RTSP server without waiting for the reply.
1331 *
1332 * @param s RTSP (de)muxer context
1333 * @param method the method for the request
1334 * @param url the target url for the request
1335 * @param headers extra header lines to include in the request
1336 * @param send_content if non-null, the data to send as request body content
1337 * @param send_content_length the length of the send_content data, or 0 if
1338 * send_content is null
1339 *
1340 * @return zero if success, nonzero otherwise
1341 */
rtsp_send_cmd_with_content_async(AVFormatContext * s,const char * method,const char * url,const char * headers,const unsigned char * send_content,int send_content_length)1342 static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
1343 const char *method, const char *url,
1344 const char *headers,
1345 const unsigned char *send_content,
1346 int send_content_length)
1347 {
1348 RTSPState *rt = s->priv_data;
1349 char buf[MAX_URL_SIZE], *out_buf;
1350 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1351
1352 if (!rt->rtsp_hd_out)
1353 return AVERROR(ENOTCONN);
1354
1355 /* Add in RTSP headers */
1356 out_buf = buf;
1357 rt->seq++;
1358 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1359 if (headers)
1360 av_strlcat(buf, headers, sizeof(buf));
1361 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1362 av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", rt->user_agent);
1363 if (rt->session_id[0] != '\0' && (!headers ||
1364 !strstr(headers, "\nIf-Match:"))) {
1365 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1366 }
1367 if (rt->auth[0]) {
1368 char *str = ff_http_auth_create_response(&rt->auth_state,
1369 rt->auth, url, method);
1370 if (str)
1371 av_strlcat(buf, str, sizeof(buf));
1372 av_free(str);
1373 }
1374 if (send_content_length > 0 && send_content)
1375 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1376 av_strlcat(buf, "\r\n", sizeof(buf));
1377
1378 /* base64 encode rtsp if tunneling */
1379 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1380 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1381 out_buf = base64buf;
1382 }
1383
1384 av_log(s, AV_LOG_TRACE, "Sending:\n%s--\n", buf);
1385
1386 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1387 if (send_content_length > 0 && send_content) {
1388 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1389 avpriv_report_missing_feature(s, "Tunneling of RTSP requests with content data");
1390 return AVERROR_PATCHWELCOME;
1391 }
1392 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1393 }
1394 rt->last_cmd_time = av_gettime_relative();
1395
1396 return 0;
1397 }
1398
ff_rtsp_send_cmd_async(AVFormatContext * s,const char * method,const char * url,const char * headers)1399 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1400 const char *url, const char *headers)
1401 {
1402 return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1403 }
1404
ff_rtsp_send_cmd(AVFormatContext * s,const char * method,const char * url,const char * headers,RTSPMessageHeader * reply,unsigned char ** content_ptr)1405 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1406 const char *headers, RTSPMessageHeader *reply,
1407 unsigned char **content_ptr)
1408 {
1409 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1410 content_ptr, NULL, 0);
1411 }
1412
ff_rtsp_send_cmd_with_content(AVFormatContext * s,const char * method,const char * url,const char * header,RTSPMessageHeader * reply,unsigned char ** content_ptr,const unsigned char * send_content,int send_content_length)1413 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1414 const char *method, const char *url,
1415 const char *header,
1416 RTSPMessageHeader *reply,
1417 unsigned char **content_ptr,
1418 const unsigned char *send_content,
1419 int send_content_length)
1420 {
1421 RTSPState *rt = s->priv_data;
1422 HTTPAuthType cur_auth_type;
1423 int ret, attempts = 0;
1424
1425 retry:
1426 cur_auth_type = rt->auth_state.auth_type;
1427 if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
1428 send_content,
1429 send_content_length)))
1430 return ret;
1431
1432 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1433 return ret;
1434 attempts++;
1435
1436 if (reply->status_code == 401 &&
1437 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1438 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1439 goto retry;
1440
1441 if (reply->status_code > 400){
1442 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1443 method,
1444 reply->status_code,
1445 reply->reason);
1446 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1447 }
1448
1449 return 0;
1450 }
1451
ff_rtsp_make_setup_request(AVFormatContext * s,const char * host,int port,int lower_transport,const char * real_challenge)1452 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1453 int lower_transport, const char *real_challenge)
1454 {
1455 RTSPState *rt = s->priv_data;
1456 int rtx = 0, j, i, err, interleave = 0, port_off = 0;
1457 RTSPStream *rtsp_st;
1458 RTSPMessageHeader reply1, *reply = &reply1;
1459 char cmd[MAX_URL_SIZE];
1460 const char *trans_pref;
1461
1462 if (rt->transport == RTSP_TRANSPORT_RDT)
1463 trans_pref = "x-pn-tng";
1464 else if (rt->transport == RTSP_TRANSPORT_RAW)
1465 trans_pref = "RAW/RAW";
1466 else
1467 trans_pref = "RTP/AVP";
1468
1469 /* default timeout: 1 minute */
1470 rt->timeout = 60;
1471
1472 /* Choose a random starting offset within the first half of the
1473 * port range, to allow for a number of ports to try even if the offset
1474 * happens to be at the end of the random range. */
1475 if (rt->rtp_port_max - rt->rtp_port_min >= 4) {
1476 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1477 /* even random offset */
1478 port_off -= port_off & 0x01;
1479 }
1480
1481 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1482 char transport[MAX_URL_SIZE];
1483
1484 /*
1485 * WMS serves all UDP data over a single connection, the RTX, which
1486 * isn't necessarily the first in the SDP but has to be the first
1487 * to be set up, else the second/third SETUP will fail with a 461.
1488 */
1489 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1490 rt->server_type == RTSP_SERVER_WMS) {
1491 if (i == 0) {
1492 /* rtx first */
1493 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1494 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1495 if (len >= 4 &&
1496 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1497 "/rtx"))
1498 break;
1499 }
1500 if (rtx == rt->nb_rtsp_streams)
1501 return -1; /* no RTX found */
1502 rtsp_st = rt->rtsp_streams[rtx];
1503 } else
1504 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1505 } else
1506 rtsp_st = rt->rtsp_streams[i];
1507
1508 /* RTP/UDP */
1509 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1510 char buf[256];
1511
1512 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1513 port = reply->transports[0].client_port_min;
1514 goto have_port;
1515 }
1516
1517 /* first try in specified port range */
1518 while (j + 1 <= rt->rtp_port_max) {
1519 AVDictionary *opts = map_to_opts(rt);
1520
1521 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1522 "?localport=%d", j);
1523 /* we will use two ports per rtp stream (rtp and rtcp) */
1524 j += 2;
1525 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1526 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1527
1528 av_dict_free(&opts);
1529
1530 if (!err)
1531 goto rtp_opened;
1532 }
1533 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1534 err = AVERROR(EIO);
1535 goto fail;
1536
1537 rtp_opened:
1538 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1539 have_port:
1540 av_strlcpy(transport, trans_pref, sizeof(transport));
1541 av_strlcat(transport,
1542 rt->server_type == RTSP_SERVER_SATIP ? ";" : "/UDP;",
1543 sizeof(transport));
1544 if (rt->server_type != RTSP_SERVER_REAL)
1545 av_strlcat(transport, "unicast;", sizeof(transport));
1546 av_strlcatf(transport, sizeof(transport),
1547 "client_port=%d", port);
1548 if (rt->transport == RTSP_TRANSPORT_RTP &&
1549 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1550 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1551 }
1552
1553 /* RTP/TCP */
1554 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1555 /* For WMS streams, the application streams are only used for
1556 * UDP. When trying to set it up for TCP streams, the server
1557 * will return an error. Therefore, we skip those streams. */
1558 if (rt->server_type == RTSP_SERVER_WMS &&
1559 (rtsp_st->stream_index < 0 ||
1560 s->streams[rtsp_st->stream_index]->codecpar->codec_type ==
1561 AVMEDIA_TYPE_DATA))
1562 continue;
1563 snprintf(transport, sizeof(transport) - 1,
1564 "%s/TCP;", trans_pref);
1565 if (rt->transport != RTSP_TRANSPORT_RDT)
1566 av_strlcat(transport, "unicast;", sizeof(transport));
1567 av_strlcatf(transport, sizeof(transport),
1568 "interleaved=%d-%d",
1569 interleave, interleave + 1);
1570 interleave += 2;
1571 }
1572
1573 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1574 snprintf(transport, sizeof(transport) - 1,
1575 "%s/UDP;multicast", trans_pref);
1576 }
1577 if (s->oformat) {
1578 av_strlcat(transport, ";mode=record", sizeof(transport));
1579 } else if (rt->server_type == RTSP_SERVER_REAL ||
1580 rt->server_type == RTSP_SERVER_WMS)
1581 av_strlcat(transport, ";mode=play", sizeof(transport));
1582 snprintf(cmd, sizeof(cmd),
1583 "Transport: %s\r\n",
1584 transport);
1585 if (rt->accept_dynamic_rate)
1586 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1587 if (CONFIG_RTPDEC && i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1588 char real_res[41], real_csum[9];
1589 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1590 real_challenge);
1591 av_strlcatf(cmd, sizeof(cmd),
1592 "If-Match: %s\r\n"
1593 "RealChallenge2: %s, sd=%s\r\n",
1594 rt->session_id, real_res, real_csum);
1595 }
1596 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1597 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1598 err = 1;
1599 goto fail;
1600 } else if (reply->status_code != RTSP_STATUS_OK ||
1601 reply->nb_transports != 1) {
1602 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
1603 goto fail;
1604 }
1605
1606 if (rt->server_type == RTSP_SERVER_SATIP && reply->stream_id[0]) {
1607 char proto[128], host[128], path[512], auth[128];
1608 int port;
1609 av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host),
1610 &port, path, sizeof(path), rt->control_uri);
1611 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host,
1612 port, "/stream=%s", reply->stream_id);
1613 }
1614
1615 /* XXX: same protocol for all streams is required */
1616 if (i > 0) {
1617 if (reply->transports[0].lower_transport != rt->lower_transport ||
1618 reply->transports[0].transport != rt->transport) {
1619 err = AVERROR_INVALIDDATA;
1620 goto fail;
1621 }
1622 } else {
1623 rt->lower_transport = reply->transports[0].lower_transport;
1624 rt->transport = reply->transports[0].transport;
1625 }
1626
1627 /* Fail if the server responded with another lower transport mode
1628 * than what we requested. */
1629 if (reply->transports[0].lower_transport != lower_transport) {
1630 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1631 err = AVERROR_INVALIDDATA;
1632 goto fail;
1633 }
1634
1635 switch(reply->transports[0].lower_transport) {
1636 case RTSP_LOWER_TRANSPORT_TCP:
1637 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1638 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1639 break;
1640
1641 case RTSP_LOWER_TRANSPORT_UDP: {
1642 char url[MAX_URL_SIZE], options[30] = "";
1643 const char *peer = host;
1644
1645 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1646 av_strlcpy(options, "?connect=1", sizeof(options));
1647 /* Use source address if specified */
1648 if (reply->transports[0].source[0])
1649 peer = reply->transports[0].source;
1650 ff_url_join(url, sizeof(url), "rtp", NULL, peer,
1651 reply->transports[0].server_port_min, "%s", options);
1652 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1653 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1654 err = AVERROR_INVALIDDATA;
1655 goto fail;
1656 }
1657 break;
1658 }
1659 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1660 char url[MAX_URL_SIZE], namebuf[50], optbuf[20] = "";
1661 struct sockaddr_storage addr;
1662 int port, ttl;
1663 AVDictionary *opts = map_to_opts(rt);
1664
1665 if (reply->transports[0].destination.ss_family) {
1666 addr = reply->transports[0].destination;
1667 port = reply->transports[0].port_min;
1668 ttl = reply->transports[0].ttl;
1669 } else {
1670 addr = rtsp_st->sdp_ip;
1671 port = rtsp_st->sdp_port;
1672 ttl = rtsp_st->sdp_ttl;
1673 }
1674 if (ttl > 0)
1675 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1676 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1677 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1678 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1679 port, "%s", optbuf);
1680 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1681 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1682 av_dict_free(&opts);
1683
1684 if (err < 0) {
1685 err = AVERROR_INVALIDDATA;
1686 goto fail;
1687 }
1688 break;
1689 }
1690 }
1691
1692 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1693 goto fail;
1694 }
1695
1696 if (rt->nb_rtsp_streams && reply->timeout > 0)
1697 rt->timeout = reply->timeout;
1698
1699 if (rt->server_type == RTSP_SERVER_REAL)
1700 rt->need_subscription = 1;
1701
1702 return 0;
1703
1704 fail:
1705 ff_rtsp_undo_setup(s, 0);
1706 return err;
1707 }
1708
ff_rtsp_close_connections(AVFormatContext * s)1709 void ff_rtsp_close_connections(AVFormatContext *s)
1710 {
1711 RTSPState *rt = s->priv_data;
1712 if (rt->rtsp_hd_out != rt->rtsp_hd)
1713 ffurl_closep(&rt->rtsp_hd_out);
1714 rt->rtsp_hd_out = NULL;
1715 ffurl_closep(&rt->rtsp_hd);
1716 }
1717
ff_rtsp_connect(AVFormatContext * s)1718 int ff_rtsp_connect(AVFormatContext *s)
1719 {
1720 RTSPState *rt = s->priv_data;
1721 char proto[128], host[1024], path[1024];
1722 char tcpname[1024], cmd[MAX_URL_SIZE], auth[128];
1723 const char *lower_rtsp_proto = "tcp";
1724 int port, err, tcp_fd;
1725 RTSPMessageHeader reply1, *reply = &reply1;
1726 int lower_transport_mask = 0;
1727 int default_port = RTSP_DEFAULT_PORT;
1728 int https_tunnel = 0;
1729 char real_challenge[64] = "";
1730 struct sockaddr_storage peer;
1731 socklen_t peer_len = sizeof(peer);
1732
1733 if (rt->rtp_port_max < rt->rtp_port_min) {
1734 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1735 "than min port %d\n", rt->rtp_port_max,
1736 rt->rtp_port_min);
1737 return AVERROR(EINVAL);
1738 }
1739
1740 if (!ff_network_init())
1741 return AVERROR(EIO);
1742
1743 if (s->max_delay < 0) /* Not set by the caller */
1744 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1745
1746 rt->control_transport = RTSP_MODE_PLAIN;
1747 if (rt->lower_transport_mask & ((1 << RTSP_LOWER_TRANSPORT_HTTP) |
1748 (1 << RTSP_LOWER_TRANSPORT_HTTPS))) {
1749 https_tunnel = !!(rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTPS));
1750 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1751 rt->control_transport = RTSP_MODE_TUNNEL;
1752 }
1753 /* Only pass through valid flags from here */
1754 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1755
1756 redirect:
1757 memset(&reply1, 0, sizeof(reply1));
1758 /* extract hostname and port */
1759 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
1760 host, sizeof(host), &port, path, sizeof(path), s->url);
1761
1762 if (!strcmp(proto, "rtsps")) {
1763 lower_rtsp_proto = "tls";
1764 default_port = RTSPS_DEFAULT_PORT;
1765 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1766 } else if (!strcmp(proto, "satip")) {
1767 av_strlcpy(proto, "rtsp", sizeof(proto));
1768 rt->server_type = RTSP_SERVER_SATIP;
1769 }
1770
1771 if (*auth) {
1772 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1773 }
1774 if (port < 0)
1775 port = default_port;
1776
1777 lower_transport_mask = rt->lower_transport_mask;
1778
1779 if (!lower_transport_mask)
1780 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1781
1782 if (s->oformat) {
1783 /* Only UDP or TCP - UDP multicast isn't supported. */
1784 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1785 (1 << RTSP_LOWER_TRANSPORT_TCP);
1786 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1787 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1788 "only UDP and TCP are supported for output.\n");
1789 err = AVERROR(EINVAL);
1790 goto fail;
1791 }
1792 }
1793
1794 /* Construct the URI used in request; this is similar to s->url,
1795 * but with authentication credentials removed and RTSP specific options
1796 * stripped out. */
1797 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
1798 host, port, "%s", path);
1799
1800 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1801 /* set up initial handshake for tunneling */
1802 char httpname[1024];
1803 char sessioncookie[17];
1804 char headers[1024];
1805 AVDictionary *options = NULL;
1806
1807 av_dict_set_int(&options, "timeout", rt->stimeout, 0);
1808
1809 ff_url_join(httpname, sizeof(httpname), https_tunnel ? "https" : "http", auth, host, port, "%s", path);
1810 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1811 av_get_random_seed(), av_get_random_seed());
1812
1813 /* GET requests */
1814 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1815 &s->interrupt_callback) < 0) {
1816 err = AVERROR(EIO);
1817 goto fail;
1818 }
1819
1820 /* generate GET headers */
1821 snprintf(headers, sizeof(headers),
1822 "x-sessioncookie: %s\r\n"
1823 "Accept: application/x-rtsp-tunnelled\r\n"
1824 "Pragma: no-cache\r\n"
1825 "Cache-Control: no-cache\r\n",
1826 sessioncookie);
1827 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1828
1829 if (!rt->rtsp_hd->protocol_whitelist && s->protocol_whitelist) {
1830 rt->rtsp_hd->protocol_whitelist = av_strdup(s->protocol_whitelist);
1831 if (!rt->rtsp_hd->protocol_whitelist) {
1832 err = AVERROR(ENOMEM);
1833 goto fail;
1834 }
1835 }
1836
1837 /* complete the connection */
1838 if (ffurl_connect(rt->rtsp_hd, &options)) {
1839 av_dict_free(&options);
1840 err = AVERROR(EIO);
1841 goto fail;
1842 }
1843
1844 /* POST requests */
1845 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1846 &s->interrupt_callback) < 0 ) {
1847 err = AVERROR(EIO);
1848 goto fail;
1849 }
1850
1851 /* generate POST headers */
1852 snprintf(headers, sizeof(headers),
1853 "x-sessioncookie: %s\r\n"
1854 "Content-Type: application/x-rtsp-tunnelled\r\n"
1855 "Pragma: no-cache\r\n"
1856 "Cache-Control: no-cache\r\n"
1857 "Content-Length: 32767\r\n"
1858 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1859 sessioncookie);
1860 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1861 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1862 av_opt_set(rt->rtsp_hd_out->priv_data, "send_expect_100", "0", 0);
1863
1864 /* Initialize the authentication state for the POST session. The HTTP
1865 * protocol implementation doesn't properly handle multi-pass
1866 * authentication for POST requests, since it would require one of
1867 * the following:
1868 * - implementing Expect: 100-continue, which many HTTP servers
1869 * don't support anyway, even less the RTSP servers that do HTTP
1870 * tunneling
1871 * - sending the whole POST data until getting a 401 reply specifying
1872 * what authentication method to use, then resending all that data
1873 * - waiting for potential 401 replies directly after sending the
1874 * POST header (waiting for some unspecified time)
1875 * Therefore, we copy the full auth state, which works for both basic
1876 * and digest. (For digest, we would have to synchronize the nonce
1877 * count variable between the two sessions, if we'd do more requests
1878 * with the original session, though.)
1879 */
1880 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1881
1882 /* complete the connection */
1883 if (ffurl_connect(rt->rtsp_hd_out, &options)) {
1884 av_dict_free(&options);
1885 err = AVERROR(EIO);
1886 goto fail;
1887 }
1888 av_dict_free(&options);
1889 } else {
1890 int ret;
1891 /* open the tcp connection */
1892 ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
1893 host, port,
1894 "?timeout=%"PRId64, rt->stimeout);
1895 if ((ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1896 &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL)) < 0) {
1897 err = ret;
1898 goto fail;
1899 }
1900 rt->rtsp_hd_out = rt->rtsp_hd;
1901 }
1902 rt->seq = 0;
1903
1904 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1905 if (tcp_fd < 0) {
1906 err = tcp_fd;
1907 goto fail;
1908 }
1909 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1910 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1911 NULL, 0, NI_NUMERICHOST);
1912 }
1913
1914 /* request options supported by the server; this also detects server
1915 * type */
1916 if (rt->server_type != RTSP_SERVER_SATIP)
1917 rt->server_type = RTSP_SERVER_RTP;
1918 for (;;) {
1919 cmd[0] = 0;
1920 if (rt->server_type == RTSP_SERVER_REAL)
1921 av_strlcat(cmd,
1922 /*
1923 * The following entries are required for proper
1924 * streaming from a Realmedia server. They are
1925 * interdependent in some way although we currently
1926 * don't quite understand how. Values were copied
1927 * from mplayer SVN r23589.
1928 * ClientChallenge is a 16-byte ID in hex
1929 * CompanyID is a 16-byte ID in base64
1930 */
1931 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1932 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1933 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1934 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1935 sizeof(cmd));
1936 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1937 if (reply->status_code != RTSP_STATUS_OK) {
1938 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
1939 goto fail;
1940 }
1941
1942 /* detect server type if not standard-compliant RTP */
1943 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1944 rt->server_type = RTSP_SERVER_REAL;
1945 continue;
1946 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1947 rt->server_type = RTSP_SERVER_WMS;
1948 } else if (rt->server_type == RTSP_SERVER_REAL)
1949 strcpy(real_challenge, reply->real_challenge);
1950 break;
1951 }
1952
1953 #if CONFIG_RTSP_DEMUXER
1954 if (s->iformat) {
1955 if (rt->server_type == RTSP_SERVER_SATIP)
1956 err = init_satip_stream(s);
1957 else
1958 err = ff_rtsp_setup_input_streams(s, reply);
1959 } else
1960 #endif
1961 if (CONFIG_RTSP_MUXER)
1962 err = ff_rtsp_setup_output_streams(s, host);
1963 else
1964 av_assert0(0);
1965 if (err)
1966 goto fail;
1967
1968 do {
1969 int lower_transport = ff_log2_tab[lower_transport_mask &
1970 ~(lower_transport_mask - 1)];
1971
1972 if ((lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP))
1973 && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP))
1974 lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1975
1976 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1977 rt->server_type == RTSP_SERVER_REAL ?
1978 real_challenge : NULL);
1979 if (err < 0)
1980 goto fail;
1981 lower_transport_mask &= ~(1 << lower_transport);
1982 if (lower_transport_mask == 0 && err == 1) {
1983 err = AVERROR(EPROTONOSUPPORT);
1984 goto fail;
1985 }
1986 } while (err);
1987
1988 rt->lower_transport_mask = lower_transport_mask;
1989 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1990 rt->state = RTSP_STATE_IDLE;
1991 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1992 return 0;
1993 fail:
1994 ff_rtsp_close_streams(s);
1995 ff_rtsp_close_connections(s);
1996 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1997 char *new_url = av_strdup(reply->location);
1998 if (!new_url) {
1999 err = AVERROR(ENOMEM);
2000 goto fail2;
2001 }
2002 ff_format_set_url(s, new_url);
2003 rt->session_id[0] = '\0';
2004 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
2005 reply->status_code,
2006 s->url);
2007 goto redirect;
2008 }
2009 fail2:
2010 ff_network_close();
2011 return err;
2012 }
2013 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
2014
2015 #if CONFIG_RTPDEC
2016 #if CONFIG_RTSP_DEMUXER
parse_rtsp_message(AVFormatContext * s)2017 static int parse_rtsp_message(AVFormatContext *s)
2018 {
2019 RTSPState *rt = s->priv_data;
2020 int ret;
2021
2022 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
2023 if (rt->state == RTSP_STATE_STREAMING) {
2024 return ff_rtsp_parse_streaming_commands(s);
2025 } else
2026 return AVERROR_EOF;
2027 } else {
2028 RTSPMessageHeader reply;
2029 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
2030 if (ret < 0)
2031 return ret;
2032 /* XXX: parse message */
2033 if (rt->state != RTSP_STATE_STREAMING)
2034 return 0;
2035 }
2036
2037 return 0;
2038 }
2039 #endif
2040
udp_read_packet(AVFormatContext * s,RTSPStream ** prtsp_st,uint8_t * buf,int buf_size,int64_t wait_end)2041 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
2042 uint8_t *buf, int buf_size, int64_t wait_end)
2043 {
2044 RTSPState *rt = s->priv_data;
2045 RTSPStream *rtsp_st;
2046 int n, i, ret;
2047 struct pollfd *p = rt->p;
2048 int *fds = NULL, fdsnum, fdsidx;
2049 int64_t runs = rt->stimeout / POLLING_TIME / 1000;
2050
2051 if (!p) {
2052 p = rt->p = av_malloc_array(2 * rt->nb_rtsp_streams + 1, sizeof(*p));
2053 if (!p)
2054 return AVERROR(ENOMEM);
2055
2056 if (rt->rtsp_hd) {
2057 p[rt->max_p].fd = ffurl_get_file_handle(rt->rtsp_hd);
2058 p[rt->max_p++].events = POLLIN;
2059 }
2060 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2061 rtsp_st = rt->rtsp_streams[i];
2062 if (rtsp_st->rtp_handle) {
2063 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
2064 &fds, &fdsnum)) {
2065 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
2066 return ret;
2067 }
2068 if (fdsnum != 2) {
2069 av_log(s, AV_LOG_ERROR,
2070 "Number of fds %d not supported\n", fdsnum);
2071 return AVERROR_INVALIDDATA;
2072 }
2073 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
2074 p[rt->max_p].fd = fds[fdsidx];
2075 p[rt->max_p++].events = POLLIN;
2076 }
2077 av_freep(&fds);
2078 }
2079 }
2080 }
2081
2082 for (;;) {
2083 if (ff_check_interrupt(&s->interrupt_callback))
2084 return AVERROR_EXIT;
2085 if (wait_end && wait_end - av_gettime_relative() < 0)
2086 return AVERROR(EAGAIN);
2087 n = poll(p, rt->max_p, POLLING_TIME);
2088 if (n > 0) {
2089 int j = rt->rtsp_hd ? 1 : 0;
2090 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2091 rtsp_st = rt->rtsp_streams[i];
2092 if (rtsp_st->rtp_handle) {
2093 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
2094 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
2095 if (ret > 0) {
2096 *prtsp_st = rtsp_st;
2097 return ret;
2098 }
2099 }
2100 j+=2;
2101 }
2102 }
2103 #if CONFIG_RTSP_DEMUXER
2104 if (rt->rtsp_hd && p[0].revents & POLLIN) {
2105 if ((ret = parse_rtsp_message(s)) < 0) {
2106 return ret;
2107 }
2108 }
2109 #endif
2110 } else if (n == 0 && rt->stimeout > 0 && --runs <= 0) {
2111 return AVERROR(ETIMEDOUT);
2112 } else if (n < 0 && errno != EINTR)
2113 return AVERROR(errno);
2114 }
2115 }
2116
pick_stream(AVFormatContext * s,RTSPStream ** rtsp_st,const uint8_t * buf,int len)2117 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
2118 const uint8_t *buf, int len)
2119 {
2120 RTSPState *rt = s->priv_data;
2121 int i;
2122 if (len < 0)
2123 return len;
2124 if (rt->nb_rtsp_streams == 1) {
2125 *rtsp_st = rt->rtsp_streams[0];
2126 return len;
2127 }
2128 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
2129 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
2130 int no_ssrc = 0;
2131 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2132 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2133 if (!rtpctx)
2134 continue;
2135 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
2136 *rtsp_st = rt->rtsp_streams[i];
2137 return len;
2138 }
2139 if (!rtpctx->ssrc)
2140 no_ssrc = 1;
2141 }
2142 if (no_ssrc) {
2143 av_log(s, AV_LOG_WARNING,
2144 "Unable to pick stream for packet - SSRC not known for "
2145 "all streams\n");
2146 return AVERROR(EAGAIN);
2147 }
2148 } else {
2149 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2150 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
2151 *rtsp_st = rt->rtsp_streams[i];
2152 return len;
2153 }
2154 }
2155 }
2156 }
2157 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
2158 return AVERROR(EAGAIN);
2159 }
2160
read_packet(AVFormatContext * s,RTSPStream ** rtsp_st,RTSPStream * first_queue_st,int64_t wait_end)2161 static int read_packet(AVFormatContext *s,
2162 RTSPStream **rtsp_st, RTSPStream *first_queue_st,
2163 int64_t wait_end)
2164 {
2165 RTSPState *rt = s->priv_data;
2166 int len;
2167
2168 switch(rt->lower_transport) {
2169 default:
2170 #if CONFIG_RTSP_DEMUXER
2171 case RTSP_LOWER_TRANSPORT_TCP:
2172 len = ff_rtsp_tcp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2173 break;
2174 #endif
2175 case RTSP_LOWER_TRANSPORT_UDP:
2176 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
2177 len = udp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2178 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2179 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, (*rtsp_st)->rtp_handle, NULL, len);
2180 break;
2181 case RTSP_LOWER_TRANSPORT_CUSTOM:
2182 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
2183 wait_end && wait_end < av_gettime_relative())
2184 len = AVERROR(EAGAIN);
2185 else
2186 len = avio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2187 len = pick_stream(s, rtsp_st, rt->recvbuf, len);
2188 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2189 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, NULL, s->pb, len);
2190 break;
2191 }
2192
2193 if (len == 0)
2194 return AVERROR_EOF;
2195
2196 return len;
2197 }
2198
ff_rtsp_fetch_packet(AVFormatContext * s,AVPacket * pkt)2199 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
2200 {
2201 RTSPState *rt = s->priv_data;
2202 int ret, len;
2203 RTSPStream *rtsp_st, *first_queue_st = NULL;
2204 int64_t wait_end = 0;
2205
2206 if (rt->nb_byes == rt->nb_rtsp_streams)
2207 return AVERROR_EOF;
2208
2209 /* get next frames from the same RTP packet */
2210 if (rt->cur_transport_priv) {
2211 if (rt->transport == RTSP_TRANSPORT_RDT) {
2212 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2213 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2214 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2215 } else if (CONFIG_RTPDEC && rt->ts) {
2216 ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
2217 if (ret >= 0) {
2218 rt->recvbuf_pos += ret;
2219 ret = rt->recvbuf_pos < rt->recvbuf_len;
2220 }
2221 } else
2222 ret = -1;
2223 if (ret == 0) {
2224 rt->cur_transport_priv = NULL;
2225 return 0;
2226 } else if (ret == 1) {
2227 return 0;
2228 } else
2229 rt->cur_transport_priv = NULL;
2230 }
2231
2232 redo:
2233 if (rt->transport == RTSP_TRANSPORT_RTP) {
2234 int i;
2235 int64_t first_queue_time = 0;
2236 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2237 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2238 int64_t queue_time;
2239 if (!rtpctx)
2240 continue;
2241 queue_time = ff_rtp_queued_packet_time(rtpctx);
2242 if (queue_time && (queue_time - first_queue_time < 0 ||
2243 !first_queue_time)) {
2244 first_queue_time = queue_time;
2245 first_queue_st = rt->rtsp_streams[i];
2246 }
2247 }
2248 if (first_queue_time) {
2249 wait_end = first_queue_time + s->max_delay;
2250 } else {
2251 wait_end = 0;
2252 first_queue_st = NULL;
2253 }
2254 }
2255
2256 /* read next RTP packet */
2257 if (!rt->recvbuf) {
2258 rt->recvbuf = av_malloc(RECVBUF_SIZE);
2259 if (!rt->recvbuf)
2260 return AVERROR(ENOMEM);
2261 }
2262
2263 len = read_packet(s, &rtsp_st, first_queue_st, wait_end);
2264 if (len == AVERROR(EAGAIN) && first_queue_st &&
2265 rt->transport == RTSP_TRANSPORT_RTP) {
2266 av_log(s, AV_LOG_WARNING,
2267 "max delay reached. need to consume packet\n");
2268 rtsp_st = first_queue_st;
2269 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
2270 goto end;
2271 }
2272 if (len < 0)
2273 return len;
2274
2275 if (rt->transport == RTSP_TRANSPORT_RDT) {
2276 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2277 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2278 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2279 if (rtsp_st->feedback) {
2280 AVIOContext *pb = NULL;
2281 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
2282 pb = s->pb;
2283 ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
2284 }
2285 if (ret < 0) {
2286 /* Either bad packet, or a RTCP packet. Check if the
2287 * first_rtcp_ntp_time field was initialized. */
2288 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
2289 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
2290 /* first_rtcp_ntp_time has been initialized for this stream,
2291 * copy the same value to all other uninitialized streams,
2292 * in order to map their timestamp origin to the same ntp time
2293 * as this one. */
2294 int i;
2295 AVStream *st = NULL;
2296 if (rtsp_st->stream_index >= 0)
2297 st = s->streams[rtsp_st->stream_index];
2298 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2299 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
2300 AVStream *st2 = NULL;
2301 if (rt->rtsp_streams[i]->stream_index >= 0)
2302 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
2303 if (rtpctx2 && st && st2 &&
2304 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2305 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
2306 rtpctx2->rtcp_ts_offset = av_rescale_q(
2307 rtpctx->rtcp_ts_offset, st->time_base,
2308 st2->time_base);
2309 }
2310 }
2311 // Make real NTP start time available in AVFormatContext
2312 if (s->start_time_realtime == AV_NOPTS_VALUE) {
2313 s->start_time_realtime = av_rescale (rtpctx->first_rtcp_ntp_time - (NTP_OFFSET << 32), 1000000, 1LL << 32);
2314 if (rtpctx->st) {
2315 s->start_time_realtime -=
2316 av_rescale_q (rtpctx->rtcp_ts_offset, rtpctx->st->time_base, AV_TIME_BASE_Q);
2317 }
2318 }
2319 }
2320 if (ret == -RTCP_BYE) {
2321 rt->nb_byes++;
2322
2323 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
2324 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
2325
2326 if (rt->nb_byes == rt->nb_rtsp_streams)
2327 return AVERROR_EOF;
2328 }
2329 }
2330 } else if (CONFIG_RTPDEC && rt->ts) {
2331 ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
2332 if (ret >= 0) {
2333 if (ret < len) {
2334 rt->recvbuf_len = len;
2335 rt->recvbuf_pos = ret;
2336 rt->cur_transport_priv = rt->ts;
2337 return 1;
2338 } else {
2339 ret = 0;
2340 }
2341 }
2342 } else {
2343 return AVERROR_INVALIDDATA;
2344 }
2345 end:
2346 if (ret < 0)
2347 goto redo;
2348 if (ret == 1)
2349 /* more packets may follow, so we save the RTP context */
2350 rt->cur_transport_priv = rtsp_st->transport_priv;
2351
2352 return ret;
2353 }
2354 #endif /* CONFIG_RTPDEC */
2355
2356 #if CONFIG_SDP_DEMUXER
sdp_probe(const AVProbeData * p1)2357 static int sdp_probe(const AVProbeData *p1)
2358 {
2359 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2360
2361 /* we look for a line beginning "c=IN IP" */
2362 while (p < p_end && *p != '\0') {
2363 if (sizeof("c=IN IP") - 1 < p_end - p &&
2364 av_strstart(p, "c=IN IP", NULL))
2365 return AVPROBE_SCORE_EXTENSION;
2366
2367 while (p < p_end - 1 && *p != '\n') p++;
2368 if (++p >= p_end)
2369 break;
2370 if (*p == '\r')
2371 p++;
2372 }
2373 return 0;
2374 }
2375
append_source_addrs(char * buf,int size,const char * name,int count,struct RTSPSource ** addrs)2376 static void append_source_addrs(char *buf, int size, const char *name,
2377 int count, struct RTSPSource **addrs)
2378 {
2379 int i;
2380 if (!count)
2381 return;
2382 av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
2383 for (i = 1; i < count; i++)
2384 av_strlcatf(buf, size, ",%s", addrs[i]->addr);
2385 }
2386
sdp_read_header(AVFormatContext * s)2387 static int sdp_read_header(AVFormatContext *s)
2388 {
2389 RTSPState *rt = s->priv_data;
2390 RTSPStream *rtsp_st;
2391 int i, err;
2392 char url[MAX_URL_SIZE];
2393 AVBPrint bp;
2394
2395 if (!ff_network_init())
2396 return AVERROR(EIO);
2397
2398 if (s->max_delay < 0) /* Not set by the caller */
2399 s->max_delay = DEFAULT_REORDERING_DELAY;
2400 if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
2401 rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
2402
2403 /* read the whole sdp file */
2404 av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED);
2405 err = avio_read_to_bprint(s->pb, &bp, INT_MAX);
2406 if (err < 0 ) {
2407 ff_network_close();
2408 av_bprint_finalize(&bp, NULL);
2409 return err;
2410 }
2411 err = ff_sdp_parse(s, bp.str);
2412 av_bprint_finalize(&bp, NULL);
2413 if (err) goto fail;
2414
2415 /* open each RTP stream */
2416 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2417 char namebuf[50];
2418 rtsp_st = rt->rtsp_streams[i];
2419
2420 if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
2421 AVDictionary *opts = map_to_opts(rt);
2422 char buf[MAX_URL_SIZE];
2423 const char *p;
2424
2425 err = getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip,
2426 sizeof(rtsp_st->sdp_ip),
2427 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2428 if (err) {
2429 av_log(s, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(err));
2430 err = AVERROR(EIO);
2431 av_dict_free(&opts);
2432 goto fail;
2433 }
2434 ff_url_join(url, sizeof(url), "rtp", NULL,
2435 namebuf, rtsp_st->sdp_port,
2436 "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
2437 rtsp_st->sdp_port, rtsp_st->sdp_ttl,
2438 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
2439 rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
2440
2441 p = strchr(s->url, '?');
2442 if (p && av_find_info_tag(buf, sizeof(buf), "localaddr", p))
2443 av_strlcatf(url, sizeof(url), "&localaddr=%s", buf);
2444 else if (rt->localaddr && rt->localaddr[0])
2445 av_strlcatf(url, sizeof(url), "&localaddr=%s", rt->localaddr);
2446 append_source_addrs(url, sizeof(url), "sources",
2447 rtsp_st->nb_include_source_addrs,
2448 rtsp_st->include_source_addrs);
2449 append_source_addrs(url, sizeof(url), "block",
2450 rtsp_st->nb_exclude_source_addrs,
2451 rtsp_st->exclude_source_addrs);
2452 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ,
2453 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
2454
2455 av_dict_free(&opts);
2456
2457 if (err < 0) {
2458 err = AVERROR_INVALIDDATA;
2459 goto fail;
2460 }
2461 }
2462 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2463 goto fail;
2464 }
2465 return 0;
2466 fail:
2467 ff_rtsp_close_streams(s);
2468 ff_network_close();
2469 return err;
2470 }
2471
sdp_read_close(AVFormatContext * s)2472 static int sdp_read_close(AVFormatContext *s)
2473 {
2474 ff_rtsp_close_streams(s);
2475 ff_network_close();
2476 return 0;
2477 }
2478
2479 static const AVClass sdp_demuxer_class = {
2480 .class_name = "SDP demuxer",
2481 .item_name = av_default_item_name,
2482 .option = sdp_options,
2483 .version = LIBAVUTIL_VERSION_INT,
2484 };
2485
2486 const AVInputFormat ff_sdp_demuxer = {
2487 .name = "sdp",
2488 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
2489 .priv_data_size = sizeof(RTSPState),
2490 .read_probe = sdp_probe,
2491 .read_header = sdp_read_header,
2492 .read_packet = ff_rtsp_fetch_packet,
2493 .read_close = sdp_read_close,
2494 .priv_class = &sdp_demuxer_class,
2495 };
2496 #endif /* CONFIG_SDP_DEMUXER */
2497
2498 #if CONFIG_RTP_DEMUXER
rtp_probe(const AVProbeData * p)2499 static int rtp_probe(const AVProbeData *p)
2500 {
2501 if (av_strstart(p->filename, "rtp:", NULL))
2502 return AVPROBE_SCORE_MAX;
2503 return 0;
2504 }
2505
rtp_read_header(AVFormatContext * s)2506 static int rtp_read_header(AVFormatContext *s)
2507 {
2508 uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
2509 char host[500], filters_buf[1000];
2510 int ret, port;
2511 URLContext* in = NULL;
2512 int payload_type;
2513 AVCodecParameters *par = NULL;
2514 struct sockaddr_storage addr;
2515 FFIOContext pb;
2516 socklen_t addrlen = sizeof(addr);
2517 RTSPState *rt = s->priv_data;
2518 const char *p;
2519 AVBPrint sdp;
2520 AVDictionary *opts = NULL;
2521
2522 if (!ff_network_init())
2523 return AVERROR(EIO);
2524
2525 opts = map_to_opts(rt);
2526 ret = ffurl_open_whitelist(&in, s->url, AVIO_FLAG_READ,
2527 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
2528 av_dict_free(&opts);
2529 if (ret)
2530 goto fail;
2531
2532 while (1) {
2533 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2534 if (ret == AVERROR(EAGAIN))
2535 continue;
2536 if (ret < 0)
2537 goto fail;
2538 if (ret < 12) {
2539 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
2540 continue;
2541 }
2542
2543 if ((recvbuf[0] & 0xc0) != 0x80) {
2544 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
2545 "received\n");
2546 continue;
2547 }
2548
2549 if (RTP_PT_IS_RTCP(recvbuf[1]))
2550 continue;
2551
2552 payload_type = recvbuf[1] & 0x7f;
2553 break;
2554 }
2555 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2556 ffurl_closep(&in);
2557
2558 par = avcodec_parameters_alloc();
2559 if (!par) {
2560 ret = AVERROR(ENOMEM);
2561 goto fail;
2562 }
2563
2564 if (ff_rtp_get_codec_info(par, payload_type)) {
2565 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2566 "without an SDP file describing it\n",
2567 payload_type);
2568 ret = AVERROR_INVALIDDATA;
2569 goto fail;
2570 }
2571 if (par->codec_type != AVMEDIA_TYPE_DATA) {
2572 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2573 "properly you need an SDP file "
2574 "describing it\n");
2575 }
2576
2577 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2578 NULL, 0, s->url);
2579
2580 av_bprint_init(&sdp, 0, AV_BPRINT_SIZE_UNLIMITED);
2581 av_bprintf(&sdp, "v=0\r\nc=IN IP%d %s\r\n",
2582 addr.ss_family == AF_INET ? 4 : 6, host);
2583
2584 p = strchr(s->url, '?');
2585 if (p) {
2586 static const char filters[][2][8] = { { "sources", "incl" },
2587 { "block", "excl" } };
2588 int i;
2589 char *q;
2590 for (i = 0; i < FF_ARRAY_ELEMS(filters); i++) {
2591 if (av_find_info_tag(filters_buf, sizeof(filters_buf), filters[i][0], p)) {
2592 q = filters_buf;
2593 while ((q = strchr(q, ',')) != NULL)
2594 *q = ' ';
2595 av_bprintf(&sdp, "a=source-filter:%s IN IP%d %s %s\r\n",
2596 filters[i][1],
2597 addr.ss_family == AF_INET ? 4 : 6, host,
2598 filters_buf);
2599 }
2600 }
2601 }
2602
2603 av_bprintf(&sdp, "m=%s %d RTP/AVP %d\r\n",
2604 par->codec_type == AVMEDIA_TYPE_DATA ? "application" :
2605 par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2606 port, payload_type);
2607 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp.str);
2608 if (!av_bprint_is_complete(&sdp))
2609 goto fail_nobuf;
2610 avcodec_parameters_free(&par);
2611
2612 ffio_init_context(&pb, sdp.str, sdp.len, 0, NULL, NULL, NULL, NULL);
2613 s->pb = &pb.pub;
2614
2615 /* if sdp_read_header() fails then following ff_network_close() cancels out */
2616 /* ff_network_init() at the start of this function. Otherwise it cancels out */
2617 /* ff_network_init() inside sdp_read_header() */
2618 ff_network_close();
2619
2620 rt->media_type_mask = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1;
2621
2622 ret = sdp_read_header(s);
2623 s->pb = NULL;
2624 av_bprint_finalize(&sdp, NULL);
2625 return ret;
2626
2627 fail_nobuf:
2628 ret = AVERROR(ENOMEM);
2629 av_log(s, AV_LOG_ERROR, "rtp_read_header(): not enough buffer space for sdp-headers\n");
2630 av_bprint_finalize(&sdp, NULL);
2631 fail:
2632 avcodec_parameters_free(&par);
2633 ffurl_closep(&in);
2634 ff_network_close();
2635 return ret;
2636 }
2637
2638 static const AVClass rtp_demuxer_class = {
2639 .class_name = "RTP demuxer",
2640 .item_name = av_default_item_name,
2641 .option = rtp_options,
2642 .version = LIBAVUTIL_VERSION_INT,
2643 };
2644
2645 const AVInputFormat ff_rtp_demuxer = {
2646 .name = "rtp",
2647 .long_name = NULL_IF_CONFIG_SMALL("RTP input"),
2648 .priv_data_size = sizeof(RTSPState),
2649 .read_probe = rtp_probe,
2650 .read_header = rtp_read_header,
2651 .read_packet = ff_rtsp_fetch_packet,
2652 .read_close = sdp_read_close,
2653 .flags = AVFMT_NOFILE,
2654 .priv_class = &rtp_demuxer_class,
2655 };
2656 #endif /* CONFIG_RTP_DEMUXER */
2657