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avcodec/x86/pngdsp: add missing emms at the end of add_png_paeth_prediction
[ffmpeg.git] / libavformat / rtsp.c
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 "libavutil/avassert.h"
23 #include "libavutil/base64.h"
24 #include "libavutil/bprint.h"
25 #include "libavutil/avstring.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/parseutils.h"
29 #include "libavutil/random_seed.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/time.h"
33 #include "avformat.h"
34 #include "avio_internal.h"
35
36 #if HAVE_POLL_H
37 #include <poll.h>
38 #endif
39 #include "internal.h"
40 #include "network.h"
41 #include "os_support.h"
42 #include "http.h"
43 #include "rtsp.h"
44
45 #include "rtpdec.h"
46 #include "rtpproto.h"
47 #include "rdt.h"
48 #include "rtpdec_formats.h"
49 #include "rtpenc_chain.h"
50 #include "url.h"
51 #include "rtpenc.h"
52 #include "mpegts.h"
53
54 /* Timeout values for socket poll, in ms,
55 * and read_packet(), in seconds */
56 #define POLL_TIMEOUT_MS 100
57 #define READ_PACKET_TIMEOUT_S 10
58 #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
59 #define SDP_MAX_SIZE 16384
60 #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
61 #define DEFAULT_REORDERING_DELAY 100000
62
63 #define OFFSET(x) offsetof(RTSPState, x)
64 #define DEC AV_OPT_FLAG_DECODING_PARAM
65 #define ENC AV_OPT_FLAG_ENCODING_PARAM
66
67 #define RTSP_FLAG_OPTS(name, longname) \
68 { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
69 { "filter_src", "only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
70
71 #define RTSP_MEDIATYPE_OPTS(name, longname) \
72 { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
73 { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
74 { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
75 { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }, \
76 { "subtitle", "Subtitle", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_SUBTITLE}, 0, 0, DEC, "allowed_media_types" }
77
78 #define COMMON_OPTS() \
79 { "reorder_queue_size", "set number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC }, \
80 { "buffer_size", "Underlying protocol send/receive buffer size", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC|ENC }, \
81 { "pkt_size", "Underlying protocol send packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, ENC } \
82
83
84 const AVOption ff_rtsp_options[] = {
85 { "initial_pause", "do not start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
86 FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
87 { "rtsp_transport", "set RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
88 { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
89 { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
90 { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
91 { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
92 { "https", "HTTPS tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTPS )}, 0, 0, DEC, "rtsp_transport" },
93 RTSP_FLAG_OPTS("rtsp_flags", "set RTSP flags"),
94 { "listen", "wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" },
95 { "prefer_tcp", "try RTP via TCP first, if available", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_PREFER_TCP}, 0, 0, DEC|ENC, "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 #if FF_API_OLD_RTSP_OPTIONS
101 { "timeout", "set maximum timeout (in seconds) to wait for incoming connections (-1 is infinite, imply flag listen) (deprecated, use listen_timeout)", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC },
102 { "stimeout", "set timeout (in microseconds) of socket TCP I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC },
103 #else
104 { "timeout", "set timeout (in microseconds) of socket TCP I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC },
105 #endif
106 COMMON_OPTS(),
107 { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
108 #if FF_API_OLD_RTSP_OPTIONS
109 { "user-agent", "override User-Agent header (deprecated, use user_agent)", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
110 #endif
111 { NULL },
112 };
113
114 static const AVOption sdp_options[] = {
115 RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
116 { "custom_io", "use custom I/O", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" },
117 { "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" },
118 RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
119 COMMON_OPTS(),
120 { NULL },
121 };
122
123 static const AVOption rtp_options[] = {
124 RTSP_FLAG_OPTS("rtp_flags", "set RTP flags"),
125 COMMON_OPTS(),
126 { NULL },
127 };
128
129
130 static AVDictionary *map_to_opts(RTSPState *rt)
131 {
132 AVDictionary *opts = NULL;
133 char buf[256];
134
135 snprintf(buf, sizeof(buf), "%d", rt->buffer_size);
136 av_dict_set(&opts, "buffer_size", buf, 0);
137 snprintf(buf, sizeof(buf), "%d", rt->pkt_size);
138 av_dict_set(&opts, "pkt_size", buf, 0);
139
140 return opts;
141 }
142
143 static void get_word_until_chars(char *buf, int buf_size,
144 const char *sep, const char **pp)
145 {
146 const char *p;
147 char *q;
148
149 p = *pp;
150 p += strspn(p, SPACE_CHARS);
151 q = buf;
152 while (!strchr(sep, *p) && *p != '\0') {
153 if ((q - buf) < buf_size - 1)
154 *q++ = *p;
155 p++;
156 }
157 if (buf_size > 0)
158 *q = '\0';
159 *pp = p;
160 }
161
162 static void get_word_sep(char *buf, int buf_size, const char *sep,
163 const char **pp)
164 {
165 if (**pp == '/') (*pp)++;
166 get_word_until_chars(buf, buf_size, sep, pp);
167 }
168
169 static void get_word(char *buf, int buf_size, const char **pp)
170 {
171 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
172 }
173
174 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
175 * and end time.
176 * Used for seeking in the rtp stream.
177 */
178 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
179 {
180 char buf[256];
181
182 p += strspn(p, SPACE_CHARS);
183 if (!av_stristart(p, "npt=", &p))
184 return;
185
186 *start = AV_NOPTS_VALUE;
187 *end = AV_NOPTS_VALUE;
188
189 get_word_sep(buf, sizeof(buf), "-", &p);
190 if (av_parse_time(start, buf, 1) < 0)
191 return;
192 if (*p == '-') {
193 p++;
194 get_word_sep(buf, sizeof(buf), "-", &p);
195 if (av_parse_time(end, buf, 1) < 0)
196 av_log(NULL, AV_LOG_DEBUG, "Failed to parse interval end specification '%s'\n", buf);
197 }
198 }
199
200 static int get_sockaddr(AVFormatContext *s,
201 const char *buf, struct sockaddr_storage *sock)
202 {
203 struct addrinfo hints = { 0 }, *ai = NULL;
204 int ret;
205
206 hints.ai_flags = AI_NUMERICHOST;
207 if ((ret = getaddrinfo(buf, NULL, &hints, &ai))) {
208 av_log(s, AV_LOG_ERROR, "getaddrinfo(%s): %s\n",
209 buf,
210 gai_strerror(ret));
211 return -1;
212 }
213 memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
214 freeaddrinfo(ai);
215 return 0;
216 }
217
218 #if CONFIG_RTPDEC
219 static void init_rtp_handler(const RTPDynamicProtocolHandler *handler,
220 RTSPStream *rtsp_st, AVStream *st)
221 {
222 AVCodecParameters *par = st ? st->codecpar : NULL;
223 if (!handler)
224 return;
225 if (par)
226 par->codec_id = handler->codec_id;
227 rtsp_st->dynamic_handler = handler;
228 if (st)
229 st->need_parsing = handler->need_parsing;
230 if (handler->priv_data_size) {
231 rtsp_st->dynamic_protocol_context = av_mallocz(handler->priv_data_size);
232 if (!rtsp_st->dynamic_protocol_context)
233 rtsp_st->dynamic_handler = NULL;
234 }
235 }
236
237 static void finalize_rtp_handler_init(AVFormatContext *s, RTSPStream *rtsp_st,
238 AVStream *st)
239 {
240 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init) {
241 int ret = rtsp_st->dynamic_handler->init(s, st ? st->index : -1,
242 rtsp_st->dynamic_protocol_context);
243 if (ret < 0) {
244 if (rtsp_st->dynamic_protocol_context) {
245 if (rtsp_st->dynamic_handler->close)
246 rtsp_st->dynamic_handler->close(
247 rtsp_st->dynamic_protocol_context);
248 av_free(rtsp_st->dynamic_protocol_context);
249 }
250 rtsp_st->dynamic_protocol_context = NULL;
251 rtsp_st->dynamic_handler = NULL;
252 }
253 }
254 }
255
256 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
257 static int sdp_parse_rtpmap(AVFormatContext *s,
258 AVStream *st, RTSPStream *rtsp_st,
259 int payload_type, const char *p)
260 {
261 AVCodecParameters *par = st->codecpar;
262 char buf[256];
263 int i;
264 const AVCodecDescriptor *desc;
265 const char *c_name;
266
267 /* See if we can handle this kind of payload.
268 * The space should normally not be there but some Real streams or
269 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
270 * have a trailing space. */
271 get_word_sep(buf, sizeof(buf), "/ ", &p);
272 if (payload_type < RTP_PT_PRIVATE) {
273 /* We are in a standard case
274 * (from http://www.iana.org/assignments/rtp-parameters). */
275 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
276 }
277
278 if (par->codec_id == AV_CODEC_ID_NONE) {
279 const RTPDynamicProtocolHandler *handler =
280 ff_rtp_handler_find_by_name(buf, par->codec_type);
281 init_rtp_handler(handler, rtsp_st, st);
282 /* If no dynamic handler was found, check with the list of standard
283 * allocated types, if such a stream for some reason happens to
284 * use a private payload type. This isn't handled in rtpdec.c, since
285 * the format name from the rtpmap line never is passed into rtpdec. */
286 if (!rtsp_st->dynamic_handler)
287 par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
288 }
289
290 desc = avcodec_descriptor_get(par->codec_id);
291 if (desc && desc->name)
292 c_name = desc->name;
293 else
294 c_name = "(null)";
295
296 get_word_sep(buf, sizeof(buf), "/", &p);
297 i = atoi(buf);
298 switch (par->codec_type) {
299 case AVMEDIA_TYPE_AUDIO:
300 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
301 par->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
302 par->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
303 if (i > 0) {
304 par->sample_rate = i;
305 avpriv_set_pts_info(st, 32, 1, par->sample_rate);
306 get_word_sep(buf, sizeof(buf), "/", &p);
307 i = atoi(buf);
308 if (i > 0)
309 par->channels = i;
310 }
311 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
312 par->sample_rate);
313 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
314 par->channels);
315 break;
316 case AVMEDIA_TYPE_VIDEO:
317 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
318 if (i > 0)
319 avpriv_set_pts_info(st, 32, 1, i);
320 break;
321 default:
322 break;
323 }
324 finalize_rtp_handler_init(s, rtsp_st, st);
325 return 0;
326 }
327
328 /* parse the attribute line from the fmtp a line of an sdp response. This
329 * is broken out as a function because it is used in rtp_h264.c, which is
330 * forthcoming. */
331 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
332 char *value, int value_size)
333 {
334 *p += strspn(*p, SPACE_CHARS);
335 if (**p) {
336 get_word_sep(attr, attr_size, "=", p);
337 if (**p == '=')
338 (*p)++;
339 get_word_sep(value, value_size, ";", p);
340 if (**p == ';')
341 (*p)++;
342 return 1;
343 }
344 return 0;
345 }
346
347 typedef struct SDPParseState {
348 /* SDP only */
349 struct sockaddr_storage default_ip;
350 int default_ttl;
351 int skip_media; ///< set if an unknown m= line occurs
352 int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
353 struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
354 int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
355 struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
356 int seen_rtpmap;
357 int seen_fmtp;
358 char delayed_fmtp[2048];
359 } SDPParseState;
360
361 static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
362 struct RTSPSource ***dest, int *dest_count)
363 {
364 RTSPSource *rtsp_src, *rtsp_src2;
365 int i;
366 for (i = 0; i < count; i++) {
367 rtsp_src = addrs[i];
368 rtsp_src2 = av_malloc(sizeof(*rtsp_src2));
369 if (!rtsp_src2)
370 continue;
371 memcpy(rtsp_src2, rtsp_src, sizeof(*rtsp_src));
372 dynarray_add(dest, dest_count, rtsp_src2);
373 }
374 }
375
376 static void parse_fmtp(AVFormatContext *s, RTSPState *rt,
377 int payload_type, const char *line)
378 {
379 int i;
380
381 for (i = 0; i < rt->nb_rtsp_streams; i++) {
382 RTSPStream *rtsp_st = rt->rtsp_streams[i];
383 if (rtsp_st->sdp_payload_type == payload_type &&
384 rtsp_st->dynamic_handler &&
385 rtsp_st->dynamic_handler->parse_sdp_a_line) {
386 rtsp_st->dynamic_handler->parse_sdp_a_line(s, rtsp_st->stream_index,
387 rtsp_st->dynamic_protocol_context, line);
388 }
389 }
390 }
391
392 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
393 int letter, const char *buf)
394 {
395 RTSPState *rt = s->priv_data;
396 char buf1[64], st_type[64];
397 const char *p;
398 enum AVMediaType codec_type;
399 int payload_type;
400 AVStream *st;
401 RTSPStream *rtsp_st;
402 RTSPSource *rtsp_src;
403 struct sockaddr_storage sdp_ip;
404 int ttl;
405
406 av_log(s, AV_LOG_TRACE, "sdp: %c='%s'\n", letter, buf);
407
408 p = buf;
409 if (s1->skip_media && letter != 'm')
410 return;
411 switch (letter) {
412 case 'c':
413 get_word(buf1, sizeof(buf1), &p);
414 if (strcmp(buf1, "IN") != 0)
415 return;
416 get_word(buf1, sizeof(buf1), &p);
417 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
418 return;
419 get_word_sep(buf1, sizeof(buf1), "/", &p);
420 if (get_sockaddr(s, buf1, &sdp_ip))
421 return;
422 ttl = 16;
423 if (*p == '/') {
424 p++;
425 get_word_sep(buf1, sizeof(buf1), "/", &p);
426 ttl = atoi(buf1);
427 }
428 if (s->nb_streams == 0) {
429 s1->default_ip = sdp_ip;
430 s1->default_ttl = ttl;
431 } else {
432 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
433 rtsp_st->sdp_ip = sdp_ip;
434 rtsp_st->sdp_ttl = ttl;
435 }
436 break;
437 case 's':
438 av_dict_set(&s->metadata, "title", p, 0);
439 break;
440 case 'i':
441 if (s->nb_streams == 0) {
442 av_dict_set(&s->metadata, "comment", p, 0);
443 break;
444 }
445 break;
446 case 'm':
447 /* new stream */
448 s1->skip_media = 0;
449 s1->seen_fmtp = 0;
450 s1->seen_rtpmap = 0;
451 codec_type = AVMEDIA_TYPE_UNKNOWN;
452 get_word(st_type, sizeof(st_type), &p);
453 if (!strcmp(st_type, "audio")) {
454 codec_type = AVMEDIA_TYPE_AUDIO;
455 } else if (!strcmp(st_type, "video")) {
456 codec_type = AVMEDIA_TYPE_VIDEO;
457 } else if (!strcmp(st_type, "application")) {
458 codec_type = AVMEDIA_TYPE_DATA;
459 } else if (!strcmp(st_type, "text")) {
460 codec_type = AVMEDIA_TYPE_SUBTITLE;
461 }
462 if (codec_type == AVMEDIA_TYPE_UNKNOWN ||
463 !(rt->media_type_mask & (1 << codec_type)) ||
464 rt->nb_rtsp_streams >= s->max_streams
465 ) {
466 s1->skip_media = 1;
467 return;
468 }
469 rtsp_st = av_mallocz(sizeof(RTSPStream));
470 if (!rtsp_st)
471 return;
472 rtsp_st->stream_index = -1;
473 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
474
475 rtsp_st->sdp_ip = s1->default_ip;
476 rtsp_st->sdp_ttl = s1->default_ttl;
477
478 copy_default_source_addrs(s1->default_include_source_addrs,
479 s1->nb_default_include_source_addrs,
480 &rtsp_st->include_source_addrs,
481 &rtsp_st->nb_include_source_addrs);
482 copy_default_source_addrs(s1->default_exclude_source_addrs,
483 s1->nb_default_exclude_source_addrs,
484 &rtsp_st->exclude_source_addrs,
485 &rtsp_st->nb_exclude_source_addrs);
486
487 get_word(buf1, sizeof(buf1), &p); /* port */
488 rtsp_st->sdp_port = atoi(buf1);
489
490 get_word(buf1, sizeof(buf1), &p); /* protocol */
491 if (!strcmp(buf1, "udp"))
492 rt->transport = RTSP_TRANSPORT_RAW;
493 else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
494 rtsp_st->feedback = 1;
495
496 /* XXX: handle list of formats */
497 get_word(buf1, sizeof(buf1), &p); /* format list */
498 rtsp_st->sdp_payload_type = atoi(buf1);
499
500 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
501 /* no corresponding stream */
502 if (rt->transport == RTSP_TRANSPORT_RAW) {
503 if (CONFIG_RTPDEC && !rt->ts)
504 rt->ts = avpriv_mpegts_parse_open(s);
505 } else {
506 const RTPDynamicProtocolHandler *handler;
507 handler = ff_rtp_handler_find_by_id(
508 rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
509 init_rtp_handler(handler, rtsp_st, NULL);
510 finalize_rtp_handler_init(s, rtsp_st, NULL);
511 }
512 } else if (rt->server_type == RTSP_SERVER_WMS &&
513 codec_type == AVMEDIA_TYPE_DATA) {
514 /* RTX stream, a stream that carries all the other actual
515 * audio/video streams. Don't expose this to the callers. */
516 } else {
517 st = avformat_new_stream(s, NULL);
518 if (!st)
519 return;
520 st->id = rt->nb_rtsp_streams - 1;
521 rtsp_st->stream_index = st->index;
522 st->codecpar->codec_type = codec_type;
523 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
524 const RTPDynamicProtocolHandler *handler;
525 /* if standard payload type, we can find the codec right now */
526 ff_rtp_get_codec_info(st->codecpar, rtsp_st->sdp_payload_type);
527 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
528 st->codecpar->sample_rate > 0)
529 avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
530 /* Even static payload types may need a custom depacketizer */
531 handler = ff_rtp_handler_find_by_id(
532 rtsp_st->sdp_payload_type, st->codecpar->codec_type);
533 init_rtp_handler(handler, rtsp_st, st);
534 finalize_rtp_handler_init(s, rtsp_st, st);
535 }
536 if (rt->default_lang[0])
537 av_dict_set(&st->metadata, "language", rt->default_lang, 0);
538 }
539 /* put a default control url */
540 av_strlcpy(rtsp_st->control_url, rt->control_uri,
541 sizeof(rtsp_st->control_url));
542 break;
543 case 'a':
544 if (av_strstart(p, "control:", &p)) {
545 if (s->nb_streams == 0) {
546 if (!strncmp(p, "rtsp://", 7))
547 av_strlcpy(rt->control_uri, p,
548 sizeof(rt->control_uri));
549 } else {
550 char proto[32];
551 /* get the control url */
552 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
553
554 /* XXX: may need to add full url resolution */
555 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
556 NULL, NULL, 0, p);
557 if (proto[0] == '\0') {
558 /* relative control URL */
559 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
560 av_strlcat(rtsp_st->control_url, "/",
561 sizeof(rtsp_st->control_url));
562 av_strlcat(rtsp_st->control_url, p,
563 sizeof(rtsp_st->control_url));
564 } else
565 av_strlcpy(rtsp_st->control_url, p,
566 sizeof(rtsp_st->control_url));
567 }
568 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
569 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
570 get_word(buf1, sizeof(buf1), &p);
571 payload_type = atoi(buf1);
572 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
573 if (rtsp_st->stream_index >= 0) {
574 st = s->streams[rtsp_st->stream_index];
575 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
576 }
577 s1->seen_rtpmap = 1;
578 if (s1->seen_fmtp) {
579 parse_fmtp(s, rt, payload_type, s1->delayed_fmtp);
580 }
581 } else if (av_strstart(p, "fmtp:", &p) ||
582 av_strstart(p, "framesize:", &p)) {
583 // let dynamic protocol handlers have a stab at the line.
584 get_word(buf1, sizeof(buf1), &p);
585 payload_type = atoi(buf1);
586 if (s1->seen_rtpmap) {
587 parse_fmtp(s, rt, payload_type, buf);
588 } else {
589 s1->seen_fmtp = 1;
590 av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp));
591 }
592 } else if (av_strstart(p, "ssrc:", &p) && s->nb_streams > 0) {
593 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
594 get_word(buf1, sizeof(buf1), &p);
595 rtsp_st->ssrc = strtoll(buf1, NULL, 10);
596 } else if (av_strstart(p, "range:", &p)) {
597 int64_t start, end;
598
599 // this is so that seeking on a streamed file can work.
600 rtsp_parse_range_npt(p, &start, &end);
601 s->start_time = start;
602 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
603 s->duration = (end == AV_NOPTS_VALUE) ?
604 AV_NOPTS_VALUE : end - start;
605 } else if (av_strstart(p, "lang:", &p)) {
606 if (s->nb_streams > 0) {
607 get_word(buf1, sizeof(buf1), &p);
608 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
609 if (rtsp_st->stream_index >= 0) {
610 st = s->streams[rtsp_st->stream_index];
611 av_dict_set(&st->metadata, "language", buf1, 0);
612 }
613 } else
614 get_word(rt->default_lang, sizeof(rt->default_lang), &p);
615 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
616 if (atoi(p) == 1)
617 rt->transport = RTSP_TRANSPORT_RDT;
618 } else if (av_strstart(p, "SampleRate:integer;", &p) &&
619 s->nb_streams > 0) {
620 st = s->streams[s->nb_streams - 1];
621 st->codecpar->sample_rate = atoi(p);
622 } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
623 // RFC 4568
624 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
625 get_word(buf1, sizeof(buf1), &p); // ignore tag
626 get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
627 p += strspn(p, SPACE_CHARS);
628 if (av_strstart(p, "inline:", &p))
629 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
630 } else if (av_strstart(p, "source-filter:", &p)) {
631 int exclude = 0;
632 get_word(buf1, sizeof(buf1), &p);
633 if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
634 return;
635 exclude = !strcmp(buf1, "excl");
636
637 get_word(buf1, sizeof(buf1), &p);
638 if (strcmp(buf1, "IN") != 0)
639 return;
640 get_word(buf1, sizeof(buf1), &p);
641 if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
642 return;
643 // not checking that the destination address actually matches or is wildcard
644 get_word(buf1, sizeof(buf1), &p);
645
646 while (*p != '\0') {
647 rtsp_src = av_mallocz(sizeof(*rtsp_src));
648 if (!rtsp_src)
649 return;
650 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
651 if (exclude) {
652 if (s->nb_streams == 0) {
653 dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
654 } else {
655 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
656 dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
657 }
658 } else {
659 if (s->nb_streams == 0) {
660 dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
661 } else {
662 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
663 dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
664 }
665 }
666 }
667 } else {
668 if (rt->server_type == RTSP_SERVER_WMS)
669 ff_wms_parse_sdp_a_line(s, p);
670 if (s->nb_streams > 0) {
671 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
672
673 if (rt->server_type == RTSP_SERVER_REAL)
674 ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
675
676 if (rtsp_st->dynamic_handler &&
677 rtsp_st->dynamic_handler->parse_sdp_a_line)
678 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
679 rtsp_st->stream_index,
680 rtsp_st->dynamic_protocol_context, buf);
681 }
682 }
683 break;
684 }
685 }
686
687 int ff_sdp_parse(AVFormatContext *s, const char *content)
688 {
689 const char *p;
690 int letter, i;
691 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
692 * contain long SDP lines containing complete ASF Headers (several
693 * kB) or arrays of MDPR (RM stream descriptor) headers plus
694 * "rulebooks" describing their properties. Therefore, the SDP line
695 * buffer is large.
696 *
697 * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
698 * in rtpdec_xiph.c. */
699 char buf[16384], *q;
700 SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
701
702 p = content;
703 for (;;) {
704 p += strspn(p, SPACE_CHARS);
705 letter = *p;
706 if (letter == '\0')
707 break;
708 p++;
709 if (*p != '=')
710 goto next_line;
711 p++;
712 /* get the content */
713 q = buf;
714 while (*p != '\n' && *p != '\r' && *p != '\0') {
715 if ((q - buf) < sizeof(buf) - 1)
716 *q++ = *p;
717 p++;
718 }
719 *q = '\0';
720 sdp_parse_line(s, s1, letter, buf);
721 next_line:
722 while (*p != '\n' && *p != '\0')
723 p++;
724 if (*p == '\n')
725 p++;
726 }
727
728 for (i = 0; i < s1->nb_default_include_source_addrs; i++)
729 av_freep(&s1->default_include_source_addrs[i]);
730 av_freep(&s1->default_include_source_addrs);
731 for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
732 av_freep(&s1->default_exclude_source_addrs[i]);
733 av_freep(&s1->default_exclude_source_addrs);
734
735 return 0;
736 }
737 #endif /* CONFIG_RTPDEC */
738
739 void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
740 {
741 RTSPState *rt = s->priv_data;
742 int i;
743
744 for (i = 0; i < rt->nb_rtsp_streams; i++) {
745 RTSPStream *rtsp_st = rt->rtsp_streams[i];
746 if (!rtsp_st)
747 continue;
748 if (rtsp_st->transport_priv) {
749 if (s->oformat) {
750 AVFormatContext *rtpctx = rtsp_st->transport_priv;
751 av_write_trailer(rtpctx);
752 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
753 if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
754 ff_rtsp_tcp_write_packet(s, rtsp_st);
755 ffio_free_dyn_buf(&rtpctx->pb);
756 } else {
757 avio_closep(&rtpctx->pb);
758 }
759 avformat_free_context(rtpctx);
760 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
761 ff_rdt_parse_close(rtsp_st->transport_priv);
762 else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
763 ff_rtp_parse_close(rtsp_st->transport_priv);
764 }
765 rtsp_st->transport_priv = NULL;
766 ffurl_closep(&rtsp_st->rtp_handle);
767 }
768 }
769
770 /* close and free RTSP streams */
771 void ff_rtsp_close_streams(AVFormatContext *s)
772 {
773 RTSPState *rt = s->priv_data;
774 int i, j;
775 RTSPStream *rtsp_st;
776
777 ff_rtsp_undo_setup(s, 0);
778 for (i = 0; i < rt->nb_rtsp_streams; i++) {
779 rtsp_st = rt->rtsp_streams[i];
780 if (rtsp_st) {
781 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) {
782 if (rtsp_st->dynamic_handler->close)
783 rtsp_st->dynamic_handler->close(
784 rtsp_st->dynamic_protocol_context);
785 av_free(rtsp_st->dynamic_protocol_context);
786 }
787 for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
788 av_freep(&rtsp_st->include_source_addrs[j]);
789 av_freep(&rtsp_st->include_source_addrs);
790 for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
791 av_freep(&rtsp_st->exclude_source_addrs[j]);
792 av_freep(&rtsp_st->exclude_source_addrs);
793
794 av_freep(&rtsp_st);
795 }
796 }
797 av_freep(&rt->rtsp_streams);
798 if (rt->asf_ctx) {
799 avformat_close_input(&rt->asf_ctx);
800 }
801 if (CONFIG_RTPDEC && rt->ts)
802 avpriv_mpegts_parse_close(rt->ts);
803 av_freep(&rt->p);
804 av_freep(&rt->recvbuf);
805 }
806
807 int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
808 {
809 RTSPState *rt = s->priv_data;
810 AVStream *st = NULL;
811 int reordering_queue_size = rt->reordering_queue_size;
812 if (reordering_queue_size < 0) {
813 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
814 reordering_queue_size = 0;
815 else
816 reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
817 }
818
819 /* open the RTP context */
820 if (rtsp_st->stream_index >= 0)
821 st = s->streams[rtsp_st->stream_index];
822 if (!st)
823 s->ctx_flags |= AVFMTCTX_NOHEADER;
824
825 if (CONFIG_RTSP_MUXER && s->oformat && st) {
826 int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
827 s, st, rtsp_st->rtp_handle,
828 RTSP_TCP_MAX_PACKET_SIZE,
829 rtsp_st->stream_index);
830 /* Ownership of rtp_handle is passed to the rtp mux context */
831 rtsp_st->rtp_handle = NULL;
832 if (ret < 0)
833 return ret;
834 st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
835 } else if (rt->transport == RTSP_TRANSPORT_RAW) {
836 return 0; // Don't need to open any parser here
837 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT && st)
838 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
839 rtsp_st->dynamic_protocol_context,
840 rtsp_st->dynamic_handler);
841 else if (CONFIG_RTPDEC)
842 rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
843 rtsp_st->sdp_payload_type,
844 reordering_queue_size);
845
846 if (!rtsp_st->transport_priv) {
847 return AVERROR(ENOMEM);
848 } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP &&
849 s->iformat) {
850 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
851 rtpctx->ssrc = rtsp_st->ssrc;
852 if (rtsp_st->dynamic_handler) {
853 ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
854 rtsp_st->dynamic_protocol_context,
855 rtsp_st->dynamic_handler);
856 }
857 if (rtsp_st->crypto_suite[0])
858 ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
859 rtsp_st->crypto_suite,
860 rtsp_st->crypto_params);
861 }
862
863 return 0;
864 }
865
866 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
867 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
868 {
869 const char *q;
870 char *p;
871 int v;
872
873 q = *pp;
874 q += strspn(q, SPACE_CHARS);
875 v = strtol(q, &p, 10);
876 if (*p == '-') {
877 p++;
878 *min_ptr = v;
879 v = strtol(p, &p, 10);
880 *max_ptr = v;
881 } else {
882 *min_ptr = v;
883 *max_ptr = v;
884 }
885 *pp = p;
886 }
887
888 /* XXX: only one transport specification is parsed */
889 static void rtsp_parse_transport(AVFormatContext *s,
890 RTSPMessageHeader *reply, const char *p)
891 {
892 char transport_protocol[16];
893 char profile[16];
894 char lower_transport[16];
895 char parameter[16];
896 RTSPTransportField *th;
897 char buf[256];
898
899 reply->nb_transports = 0;
900
901 for (;;) {
902 p += strspn(p, SPACE_CHARS);
903 if (*p == '\0')
904 break;
905
906 th = &reply->transports[reply->nb_transports];
907
908 get_word_sep(transport_protocol, sizeof(transport_protocol),
909 "/", &p);
910 if (!av_strcasecmp (transport_protocol, "rtp")) {
911 get_word_sep(profile, sizeof(profile), "/;,", &p);
912 lower_transport[0] = '\0';
913 /* rtp/avp/<protocol> */
914 if (*p == '/') {
915 get_word_sep(lower_transport, sizeof(lower_transport),
916 ";,", &p);
917 }
918 th->transport = RTSP_TRANSPORT_RTP;
919 } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
920 !av_strcasecmp (transport_protocol, "x-real-rdt")) {
921 /* x-pn-tng/<protocol> */
922 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
923 profile[0] = '\0';
924 th->transport = RTSP_TRANSPORT_RDT;
925 } else if (!av_strcasecmp(transport_protocol, "raw")) {
926 get_word_sep(profile, sizeof(profile), "/;,", &p);
927 lower_transport[0] = '\0';
928 /* raw/raw/<protocol> */
929 if (*p == '/') {
930 get_word_sep(lower_transport, sizeof(lower_transport),
931 ";,", &p);
932 }
933 th->transport = RTSP_TRANSPORT_RAW;
934 } else {
935 break;
936 }
937 if (!av_strcasecmp(lower_transport, "TCP"))
938 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
939 else
940 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
941
942 if (*p == ';')
943 p++;
944 /* get each parameter */
945 while (*p != '\0' && *p != ',') {
946 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
947 if (!strcmp(parameter, "port")) {
948 if (*p == '=') {
949 p++;
950 rtsp_parse_range(&th->port_min, &th->port_max, &p);
951 }
952 } else if (!strcmp(parameter, "client_port")) {
953 if (*p == '=') {
954 p++;
955 rtsp_parse_range(&th->client_port_min,
956 &th->client_port_max, &p);
957 }
958 } else if (!strcmp(parameter, "server_port")) {
959 if (*p == '=') {
960 p++;
961 rtsp_parse_range(&th->server_port_min,
962 &th->server_port_max, &p);
963 }
964 } else if (!strcmp(parameter, "interleaved")) {
965 if (*p == '=') {
966 p++;
967 rtsp_parse_range(&th->interleaved_min,
968 &th->interleaved_max, &p);
969 }
970 } else if (!strcmp(parameter, "multicast")) {
971 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
972 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
973 } else if (!strcmp(parameter, "ttl")) {
974 if (*p == '=') {
975 char *end;
976 p++;
977 th->ttl = strtol(p, &end, 10);
978 p = end;
979 }
980 } else if (!strcmp(parameter, "destination")) {
981 if (*p == '=') {
982 p++;
983 get_word_sep(buf, sizeof(buf), ";,", &p);
984 get_sockaddr(s, buf, &th->destination);
985 }
986 } else if (!strcmp(parameter, "source")) {
987 if (*p == '=') {
988 p++;
989 get_word_sep(buf, sizeof(buf), ";,", &p);
990 av_strlcpy(th->source, buf, sizeof(th->source));
991 }
992 } else if (!strcmp(parameter, "mode")) {
993 if (*p == '=') {
994 p++;
995 get_word_sep(buf, sizeof(buf), ";, ", &p);
996 if (!strcmp(buf, "record") ||
997 !strcmp(buf, "receive"))
998 th->mode_record = 1;
999 }
1000 }
1001
1002 while (*p != ';' && *p != '\0' && *p != ',')
1003 p++;
1004 if (*p == ';')
1005 p++;
1006 }
1007 if (*p == ',')
1008 p++;
1009
1010 reply->nb_transports++;
1011 if (reply->nb_transports >= RTSP_MAX_TRANSPORTS)
1012 break;
1013 }
1014 }
1015
1016 static void handle_rtp_info(RTSPState *rt, const char *url,
1017 uint32_t seq, uint32_t rtptime)
1018 {
1019 int i;
1020 if (!rtptime || !url[0])
1021 return;
1022 if (rt->transport != RTSP_TRANSPORT_RTP)
1023 return;
1024 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1025 RTSPStream *rtsp_st = rt->rtsp_streams[i];
1026 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1027 if (!rtpctx)
1028 continue;
1029 if (!strcmp(rtsp_st->control_url, url)) {
1030 rtpctx->base_timestamp = rtptime;
1031 break;
1032 }
1033 }
1034 }
1035
1036 static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
1037 {
1038 int read = 0;
1039 char key[20], value[1024], url[1024] = "";
1040 uint32_t seq = 0, rtptime = 0;
1041
1042 for (;;) {
1043 p += strspn(p, SPACE_CHARS);
1044 if (!*p)
1045 break;
1046 get_word_sep(key, sizeof(key), "=", &p);
1047 if (*p != '=')
1048 break;
1049 p++;
1050 get_word_sep(value, sizeof(value), ";, ", &p);
1051 read++;
1052 if (!strcmp(key, "url"))
1053 av_strlcpy(url, value, sizeof(url));
1054 else if (!strcmp(key, "seq"))
1055 seq = strtoul(value, NULL, 10);
1056 else if (!strcmp(key, "rtptime"))
1057 rtptime = strtoul(value, NULL, 10);
1058 if (*p == ',') {
1059 handle_rtp_info(rt, url, seq, rtptime);
1060 url[0] = '\0';
1061 seq = rtptime = 0;
1062 read = 0;
1063 }
1064 if (*p)
1065 p++;
1066 }
1067 if (read > 0)
1068 handle_rtp_info(rt, url, seq, rtptime);
1069 }
1070
1071 void ff_rtsp_parse_line(AVFormatContext *s,
1072 RTSPMessageHeader *reply, const char *buf,
1073 RTSPState *rt, const char *method)
1074 {
1075 const char *p;
1076
1077 /* NOTE: we do case independent match for broken servers */
1078 p = buf;
1079 if (av_stristart(p, "Session:", &p)) {
1080 int t;
1081 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
1082 if (av_stristart(p, ";timeout=", &p) &&
1083 (t = strtol(p, NULL, 10)) > 0) {
1084 reply->timeout = t;
1085 }
1086 } else if (av_stristart(p, "Content-Length:", &p)) {
1087 reply->content_length = strtol(p, NULL, 10);
1088 } else if (av_stristart(p, "Transport:", &p)) {
1089 rtsp_parse_transport(s, reply, p);
1090 } else if (av_stristart(p, "CSeq:", &p)) {
1091 reply->seq = strtol(p, NULL, 10);
1092 } else if (av_stristart(p, "Range:", &p)) {
1093 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1094 } else if (av_stristart(p, "RealChallenge1:", &p)) {
1095 p += strspn(p, SPACE_CHARS);
1096 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1097 } else if (av_stristart(p, "Server:", &p)) {
1098 p += strspn(p, SPACE_CHARS);
1099 av_strlcpy(reply->server, p, sizeof(reply->server));
1100 } else if (av_stristart(p, "Notice:", &p) ||
1101 av_stristart(p, "X-Notice:", &p)) {
1102 reply->notice = strtol(p, NULL, 10);
1103 } else if (av_stristart(p, "Location:", &p)) {
1104 p += strspn(p, SPACE_CHARS);
1105 av_strlcpy(reply->location, p , sizeof(reply->location));
1106 } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
1107 p += strspn(p, SPACE_CHARS);
1108 ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
1109 } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1110 p += strspn(p, SPACE_CHARS);
1111 ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1112 } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1113 p += strspn(p, SPACE_CHARS);
1114 if (method && !strcmp(method, "DESCRIBE"))
1115 av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1116 } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
1117 p += strspn(p, SPACE_CHARS);
1118 if (method && !strcmp(method, "PLAY"))
1119 rtsp_parse_rtp_info(rt, p);
1120 } else if (av_stristart(p, "Public:", &p) && rt) {
1121 if (strstr(p, "GET_PARAMETER") &&
1122 method && !strcmp(method, "OPTIONS"))
1123 rt->get_parameter_supported = 1;
1124 } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
1125 p += strspn(p, SPACE_CHARS);
1126 rt->accept_dynamic_rate = atoi(p);
1127 } else if (av_stristart(p, "Content-Type:", &p)) {
1128 p += strspn(p, SPACE_CHARS);
1129 av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1130 }
1131 }
1132
1133 /* skip a RTP/TCP interleaved packet */
1134 void ff_rtsp_skip_packet(AVFormatContext *s)
1135 {
1136 RTSPState *rt = s->priv_data;
1137 int ret, len, len1;
1138 uint8_t buf[1024];
1139
1140 ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1141 if (ret != 3)
1142 return;
1143 len = AV_RB16(buf + 1);
1144
1145 av_log(s, AV_LOG_TRACE, "skipping RTP packet len=%d\n", len);
1146
1147 /* skip payload */
1148 while (len > 0) {
1149 len1 = len;
1150 if (len1 > sizeof(buf))
1151 len1 = sizeof(buf);
1152 ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1153 if (ret != len1)
1154 return;
1155 len -= len1;
1156 }
1157 }
1158
1159 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
1160 unsigned char **content_ptr,
1161 int return_on_interleaved_data, const char *method)
1162 {
1163 RTSPState *rt = s->priv_data;
1164 char buf[4096], buf1[1024], *q;
1165 unsigned char ch;
1166 const char *p;
1167 int ret, content_length, line_count = 0, request = 0;
1168 unsigned char *content = NULL;
1169
1170 start:
1171 line_count = 0;
1172 request = 0;
1173 content = NULL;
1174 memset(reply, 0, sizeof(*reply));
1175
1176 /* parse reply (XXX: use buffers) */
1177 rt->last_reply[0] = '\0';
1178 for (;;) {
1179 q = buf;
1180 for (;;) {
1181 ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1182 av_log(s, AV_LOG_TRACE, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1183 if (ret != 1)
1184 return AVERROR_EOF;
1185 if (ch == '\n')
1186 break;
1187 if (ch == '$' && q == buf) {
1188 if (return_on_interleaved_data) {
1189 return 1;
1190 } else
1191 ff_rtsp_skip_packet(s);
1192 } else if (ch != '\r') {
1193 if ((q - buf) < sizeof(buf) - 1)
1194 *q++ = ch;
1195 }
1196 }
1197 *q = '\0';
1198
1199 av_log(s, AV_LOG_TRACE, "line='%s'\n", buf);
1200
1201 /* test if last line */
1202 if (buf[0] == '\0')
1203 break;
1204 p = buf;
1205 if (line_count == 0) {
1206 /* get reply code */
1207 get_word(buf1, sizeof(buf1), &p);
1208 if (!strncmp(buf1, "RTSP/", 5)) {
1209 get_word(buf1, sizeof(buf1), &p);
1210 reply->status_code = atoi(buf1);
1211 av_strlcpy(reply->reason, p, sizeof(reply->reason));
1212 } else {
1213 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
1214 get_word(buf1, sizeof(buf1), &p); // object
1215 request = 1;
1216 }
1217 } else {
1218 ff_rtsp_parse_line(s, reply, p, rt, method);
1219 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1220 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1221 }
1222 line_count++;
1223 }
1224
1225 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1226 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1227
1228 content_length = reply->content_length;
1229 if (content_length > 0) {
1230 /* leave some room for a trailing '\0' (useful for simple parsing) */
1231 content = av_malloc(content_length + 1);
1232 if (!content)
1233 return AVERROR(ENOMEM);
1234 ffurl_read_complete(rt->rtsp_hd, content, content_length);
1235 content[content_length] = '\0';
1236 }
1237 if (content_ptr)
1238 *content_ptr = content;
1239 else
1240 av_freep(&content);
1241
1242 if (request) {
1243 char buf[1024];
1244 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1245 const char* ptr = buf;
1246
1247 if (!strcmp(reply->reason, "OPTIONS")) {
1248 snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
1249 if (reply->seq)
1250 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
1251 if (reply->session_id[0])
1252 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
1253 reply->session_id);
1254 } else {
1255 snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
1256 }
1257 av_strlcat(buf, "\r\n", sizeof(buf));
1258
1259 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1260 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1261 ptr = base64buf;
1262 }
1263 ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
1264
1265 rt->last_cmd_time = av_gettime_relative();
1266 /* Even if the request from the server had data, it is not the data
1267 * that the caller wants or expects. The memory could also be leaked
1268 * if the actual following reply has content data. */
1269 if (content_ptr)
1270 av_freep(content_ptr);
1271 /* If method is set, this is called from ff_rtsp_send_cmd,
1272 * where a reply to exactly this request is awaited. For
1273 * callers from within packet receiving, we just want to
1274 * return to the caller and go back to receiving packets. */
1275 if (method)
1276 goto start;
1277 return 0;
1278 }
1279
1280 if (rt->seq != reply->seq) {
1281 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
1282 rt->seq, reply->seq);
1283 }
1284
1285 /* EOS */
1286 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1287 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1288 reply->notice == 2306 /* Continuous Feed Terminated */) {
1289 rt->state = RTSP_STATE_IDLE;
1290 } else if (reply->notice >= 4400 && reply->notice < 5500) {
1291 return AVERROR(EIO); /* data or server error */
1292 } else if (reply->notice == 2401 /* Ticket Expired */ ||
1293 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1294 return AVERROR(EPERM);
1295
1296 return 0;
1297 }
1298
1299 /**
1300 * Send a command to the RTSP server without waiting for the reply.
1301 *
1302 * @param s RTSP (de)muxer context
1303 * @param method the method for the request
1304 * @param url the target url for the request
1305 * @param headers extra header lines to include in the request
1306 * @param send_content if non-null, the data to send as request body content
1307 * @param send_content_length the length of the send_content data, or 0 if
1308 * send_content is null
1309 *
1310 * @return zero if success, nonzero otherwise
1311 */
1312 static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
1313 const char *method, const char *url,
1314 const char *headers,
1315 const unsigned char *send_content,
1316 int send_content_length)
1317 {
1318 RTSPState *rt = s->priv_data;
1319 char buf[4096], *out_buf;
1320 char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1321
1322 if (!rt->rtsp_hd_out)
1323 return AVERROR(ENOTCONN);
1324
1325 /* Add in RTSP headers */
1326 out_buf = buf;
1327 rt->seq++;
1328 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1329 if (headers)
1330 av_strlcat(buf, headers, sizeof(buf));
1331 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1332 av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n", rt->user_agent);
1333 if (rt->session_id[0] != '\0' && (!headers ||
1334 !strstr(headers, "\nIf-Match:"))) {
1335 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1336 }
1337 if (rt->auth[0]) {
1338 char *str = ff_http_auth_create_response(&rt->auth_state,
1339 rt->auth, url, method);
1340 if (str)
1341 av_strlcat(buf, str, sizeof(buf));
1342 av_free(str);
1343 }
1344 if (send_content_length > 0 && send_content)
1345 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1346 av_strlcat(buf, "\r\n", sizeof(buf));
1347
1348 /* base64 encode rtsp if tunneling */
1349 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1350 av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
1351 out_buf = base64buf;
1352 }
1353
1354 av_log(s, AV_LOG_TRACE, "Sending:\n%s--\n", buf);
1355
1356 ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
1357 if (send_content_length > 0 && send_content) {
1358 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1359 avpriv_report_missing_feature(s, "Tunneling of RTSP requests with content data");
1360 return AVERROR_PATCHWELCOME;
1361 }
1362 ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1363 }
1364 rt->last_cmd_time = av_gettime_relative();
1365
1366 return 0;
1367 }
1368
1369 int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1370 const char *url, const char *headers)
1371 {
1372 return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1373 }
1374
1375 int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1376 const char *headers, RTSPMessageHeader *reply,
1377 unsigned char **content_ptr)
1378 {
1379 return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1380 content_ptr, NULL, 0);
1381 }
1382
1383 int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1384 const char *method, const char *url,
1385 const char *header,
1386 RTSPMessageHeader *reply,
1387 unsigned char **content_ptr,
1388 const unsigned char *send_content,
1389 int send_content_length)
1390 {
1391 RTSPState *rt = s->priv_data;
1392 HTTPAuthType cur_auth_type;
1393 int ret, attempts = 0;
1394
1395 retry:
1396 cur_auth_type = rt->auth_state.auth_type;
1397 if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
1398 send_content,
1399 send_content_length)) < 0)
1400 return ret;
1401
1402 if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1403 return ret;
1404 attempts++;
1405
1406 if (reply->status_code == 401 &&
1407 (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
1408 rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1409 goto retry;
1410
1411 if (reply->status_code > 400){
1412 av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1413 method,
1414 reply->status_code,
1415 reply->reason);
1416 av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1417 }
1418
1419 return 0;
1420 }
1421
1422 int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1423 int lower_transport, const char *real_challenge)
1424 {
1425 RTSPState *rt = s->priv_data;
1426 int rtx = 0, j, i, err, interleave = 0, port_off;
1427 RTSPStream *rtsp_st;
1428 RTSPMessageHeader reply1, *reply = &reply1;
1429 char cmd[2048];
1430 const char *trans_pref;
1431
1432 memset(&reply1, 0, sizeof(reply1));
1433
1434 if (rt->transport == RTSP_TRANSPORT_RDT)
1435 trans_pref = "x-pn-tng";
1436 else if (rt->transport == RTSP_TRANSPORT_RAW)
1437 trans_pref = "RAW/RAW";
1438 else
1439 trans_pref = "RTP/AVP";
1440
1441 /* default timeout: 1 minute */
1442 rt->timeout = 60;
1443
1444 /* Choose a random starting offset within the first half of the
1445 * port range, to allow for a number of ports to try even if the offset
1446 * happens to be at the end of the random range. */
1447 port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
1448 /* even random offset */
1449 port_off -= port_off & 0x01;
1450
1451 for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1452 char transport[2048];
1453
1454 /*
1455 * WMS serves all UDP data over a single connection, the RTX, which
1456 * isn't necessarily the first in the SDP but has to be the first
1457 * to be set up, else the second/third SETUP will fail with a 461.
1458 */
1459 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1460 rt->server_type == RTSP_SERVER_WMS) {
1461 if (i == 0) {
1462 /* rtx first */
1463 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1464 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1465 if (len >= 4 &&
1466 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1467 "/rtx"))
1468 break;
1469 }
1470 if (rtx == rt->nb_rtsp_streams)
1471 return -1; /* no RTX found */
1472 rtsp_st = rt->rtsp_streams[rtx];
1473 } else
1474 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1475 } else
1476 rtsp_st = rt->rtsp_streams[i];
1477
1478 /* RTP/UDP */
1479 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1480 char buf[256];
1481
1482 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1483 port = reply->transports[0].client_port_min;
1484 goto have_port;
1485 }
1486
1487 /* first try in specified port range */
1488 while (j <= rt->rtp_port_max) {
1489 AVDictionary *opts = map_to_opts(rt);
1490
1491 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1492 "?localport=%d", j);
1493 /* we will use two ports per rtp stream (rtp and rtcp) */
1494 j += 2;
1495 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
1496 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1497
1498 av_dict_free(&opts);
1499
1500 if (!err)
1501 goto rtp_opened;
1502 }
1503 av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1504 err = AVERROR(EIO);
1505 goto fail;
1506
1507 rtp_opened:
1508 port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1509 have_port:
1510 snprintf(transport, sizeof(transport) - 1,
1511 "%s/UDP;", trans_pref);
1512 if (rt->server_type != RTSP_SERVER_REAL)
1513 av_strlcat(transport, "unicast;", sizeof(transport));
1514 av_strlcatf(transport, sizeof(transport),
1515 "client_port=%d", port);
1516 if (rt->transport == RTSP_TRANSPORT_RTP &&
1517 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1518 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1519 }
1520
1521 /* RTP/TCP */
1522 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1523 /* For WMS streams, the application streams are only used for
1524 * UDP. When trying to set it up for TCP streams, the server
1525 * will return an error. Therefore, we skip those streams. */
1526 if (rt->server_type == RTSP_SERVER_WMS &&
1527 (rtsp_st->stream_index < 0 ||
1528 s->streams[rtsp_st->stream_index]->codecpar->codec_type ==
1529 AVMEDIA_TYPE_DATA))
1530 continue;
1531 snprintf(transport, sizeof(transport) - 1,
1532 "%s/TCP;", trans_pref);
1533 if (rt->transport != RTSP_TRANSPORT_RDT)
1534 av_strlcat(transport, "unicast;", sizeof(transport));
1535 av_strlcatf(transport, sizeof(transport),
1536 "interleaved=%d-%d",
1537 interleave, interleave + 1);
1538 interleave += 2;
1539 }
1540
1541 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1542 snprintf(transport, sizeof(transport) - 1,
1543 "%s/UDP;multicast", trans_pref);
1544 } else {
1545 err = AVERROR(EINVAL);
1546 goto fail; // transport would be uninitialized
1547 }
1548
1549 if (s->oformat) {
1550 av_strlcat(transport, ";mode=record", sizeof(transport));
1551 } else if (rt->server_type == RTSP_SERVER_REAL ||
1552 rt->server_type == RTSP_SERVER_WMS)
1553 av_strlcat(transport, ";mode=play", sizeof(transport));
1554 snprintf(cmd, sizeof(cmd),
1555 "Transport: %s\r\n",
1556 transport);
1557 if (rt->accept_dynamic_rate)
1558 av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1559 if (CONFIG_RTPDEC && i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1560 char real_res[41], real_csum[9];
1561 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1562 real_challenge);
1563 av_strlcatf(cmd, sizeof(cmd),
1564 "If-Match: %s\r\n"
1565 "RealChallenge2: %s, sd=%s\r\n",
1566 rt->session_id, real_res, real_csum);
1567 }
1568 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1569 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1570 err = 1;
1571 goto fail;
1572 } else if (reply->status_code != RTSP_STATUS_OK ||
1573 reply->nb_transports != 1) {
1574 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
1575 goto fail;
1576 }
1577
1578 /* XXX: same protocol for all streams is required */
1579 if (i > 0) {
1580 if (reply->transports[0].lower_transport != rt->lower_transport ||
1581 reply->transports[0].transport != rt->transport) {
1582 err = AVERROR_INVALIDDATA;
1583 goto fail;
1584 }
1585 } else {
1586 rt->lower_transport = reply->transports[0].lower_transport;
1587 rt->transport = reply->transports[0].transport;
1588 }
1589
1590 /* Fail if the server responded with another lower transport mode
1591 * than what we requested. */
1592 if (reply->transports[0].lower_transport != lower_transport) {
1593 av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1594 err = AVERROR_INVALIDDATA;
1595 goto fail;
1596 }
1597
1598 switch(reply->transports[0].lower_transport) {
1599 case RTSP_LOWER_TRANSPORT_TCP:
1600 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1601 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1602 break;
1603
1604 case RTSP_LOWER_TRANSPORT_UDP: {
1605 char url[1024], options[30] = "";
1606 const char *peer = host;
1607
1608 if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1609 av_strlcpy(options, "?connect=1", sizeof(options));
1610 /* Use source address if specified */
1611 if (reply->transports[0].source[0])
1612 peer = reply->transports[0].source;
1613 ff_url_join(url, sizeof(url), "rtp", NULL, peer,
1614 reply->transports[0].server_port_min, "%s", options);
1615 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1616 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617 err = AVERROR_INVALIDDATA;
1618 goto fail;
1619 }
1620 break;
1621 }
1622 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1623 char url[1024], namebuf[50], optbuf[20] = "";
1624 struct sockaddr_storage addr;
1625 int port, ttl;
1626 AVDictionary *opts = map_to_opts(rt);
1627
1628 if (reply->transports[0].destination.ss_family) {
1629 addr = reply->transports[0].destination;
1630 port = reply->transports[0].port_min;
1631 ttl = reply->transports[0].ttl;
1632 } else {
1633 addr = rtsp_st->sdp_ip;
1634 port = rtsp_st->sdp_port;
1635 ttl = rtsp_st->sdp_ttl;
1636 }
1637 if (ttl > 0)
1638 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1639 getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1640 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1641 ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1642 port, "%s", optbuf);
1643 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1644 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
1645 av_dict_free(&opts);
1646
1647 if (err < 0) {
1648 err = AVERROR_INVALIDDATA;
1649 goto fail;
1650 }
1651 break;
1652 }
1653 }
1654
1655 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1656 goto fail;
1657 }
1658
1659 if (rt->nb_rtsp_streams && reply->timeout > 0)
1660 rt->timeout = reply->timeout;
1661
1662 if (rt->server_type == RTSP_SERVER_REAL)
1663 rt->need_subscription = 1;
1664
1665 return 0;
1666
1667 fail:
1668 ff_rtsp_undo_setup(s, 0);
1669 return err;
1670 }
1671
1672 void ff_rtsp_close_connections(AVFormatContext *s)
1673 {
1674 RTSPState *rt = s->priv_data;
1675 if (rt->rtsp_hd_out != rt->rtsp_hd)
1676 ffurl_closep(&rt->rtsp_hd_out);
1677 rt->rtsp_hd_out = NULL;
1678 ffurl_closep(&rt->rtsp_hd);
1679 }
1680
1681 int ff_rtsp_connect(AVFormatContext *s)
1682 {
1683 RTSPState *rt = s->priv_data;
1684 char proto[128], host[1024], path[1024];
1685 char tcpname[1024], cmd[2048], auth[128];
1686 const char *lower_rtsp_proto = "tcp";
1687 int port, err, tcp_fd;
1688 RTSPMessageHeader reply1, *reply = &reply1;
1689 int lower_transport_mask = 0;
1690 int default_port = RTSP_DEFAULT_PORT;
1691 int https_tunnel = 0;
1692 char real_challenge[64] = "";
1693 struct sockaddr_storage peer;
1694 socklen_t peer_len = sizeof(peer);
1695
1696 if (rt->rtp_port_max < rt->rtp_port_min) {
1697 av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
1698 "than min port %d\n", rt->rtp_port_max,
1699 rt->rtp_port_min);
1700 return AVERROR(EINVAL);
1701 }
1702
1703 if (!ff_network_init())
1704 return AVERROR(EIO);
1705
1706 if (s->max_delay < 0) /* Not set by the caller */
1707 s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1708
1709 rt->control_transport = RTSP_MODE_PLAIN;
1710 if (rt->lower_transport_mask & ((1 << RTSP_LOWER_TRANSPORT_HTTP) |
1711 (1 << RTSP_LOWER_TRANSPORT_HTTPS))) {
1712 https_tunnel = !!(rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTPS));
1713 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1714 rt->control_transport = RTSP_MODE_TUNNEL;
1715 }
1716 /* Only pass through valid flags from here */
1717 rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1718
1719 redirect:
1720 memset(&reply1, 0, sizeof(reply1));
1721 /* extract hostname and port */
1722 av_url_split(proto, sizeof(proto), auth, sizeof(auth),
1723 host, sizeof(host), &port, path, sizeof(path), s->url);
1724
1725 if (!strcmp(proto, "rtsps")) {
1726 lower_rtsp_proto = "tls";
1727 default_port = RTSPS_DEFAULT_PORT;
1728 rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
1729 }
1730
1731 if (*auth) {
1732 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1733 }
1734 if (port < 0)
1735 port = default_port;
1736
1737 lower_transport_mask = rt->lower_transport_mask;
1738
1739 if (!lower_transport_mask)
1740 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1741
1742 if (s->oformat) {
1743 /* Only UDP or TCP - UDP multicast isn't supported. */
1744 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1745 (1 << RTSP_LOWER_TRANSPORT_TCP);
1746 if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1747 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1748 "only UDP and TCP are supported for output.\n");
1749 err = AVERROR(EINVAL);
1750 goto fail;
1751 }
1752 }
1753
1754 /* Construct the URI used in request; this is similar to s->url,
1755 * but with authentication credentials removed and RTSP specific options
1756 * stripped out. */
1757 ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
1758 host, port, "%s", path);
1759
1760 if (rt->control_transport == RTSP_MODE_TUNNEL) {
1761 /* set up initial handshake for tunneling */
1762 char httpname[1024];
1763 char sessioncookie[17];
1764 char headers[1024];
1765 AVDictionary *options = NULL;
1766
1767 av_dict_set_int(&options, "timeout", rt->stimeout, 0);
1768
1769 ff_url_join(httpname, sizeof(httpname), https_tunnel ? "https" : "http", auth, host, port, "%s", path);
1770 snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1771 av_get_random_seed(), av_get_random_seed());
1772
1773 /* GET requests */
1774 if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
1775 &s->interrupt_callback) < 0) {
1776 err = AVERROR(EIO);
1777 goto fail;
1778 }
1779
1780 /* generate GET headers */
1781 snprintf(headers, sizeof(headers),
1782 "x-sessioncookie: %s\r\n"
1783 "Accept: application/x-rtsp-tunnelled\r\n"
1784 "Pragma: no-cache\r\n"
1785 "Cache-Control: no-cache\r\n",
1786 sessioncookie);
1787 av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1788
1789 if (!rt->rtsp_hd->protocol_whitelist && s->protocol_whitelist) {
1790 rt->rtsp_hd->protocol_whitelist = av_strdup(s->protocol_whitelist);
1791 if (!rt->rtsp_hd->protocol_whitelist) {
1792 err = AVERROR(ENOMEM);
1793 goto fail;
1794 }
1795 }
1796
1797 /* complete the connection */
1798 if (ffurl_connect(rt->rtsp_hd, &options)) {
1799 av_dict_free(&options);
1800 err = AVERROR(EIO);
1801 goto fail;
1802 }
1803
1804 /* POST requests */
1805 if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
1806 &s->interrupt_callback) < 0 ) {
1807 err = AVERROR(EIO);
1808 goto fail;
1809 }
1810
1811 /* generate POST headers */
1812 snprintf(headers, sizeof(headers),
1813 "x-sessioncookie: %s\r\n"
1814 "Content-Type: application/x-rtsp-tunnelled\r\n"
1815 "Pragma: no-cache\r\n"
1816 "Cache-Control: no-cache\r\n"
1817 "Content-Length: 32767\r\n"
1818 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1819 sessioncookie);
1820 av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1821 av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1822 av_opt_set(rt->rtsp_hd_out->priv_data, "send_expect_100", "0", 0);
1823
1824 /* Initialize the authentication state for the POST session. The HTTP
1825 * protocol implementation doesn't properly handle multi-pass
1826 * authentication for POST requests, since it would require one of
1827 * the following:
1828 * - implementing Expect: 100-continue, which many HTTP servers
1829 * don't support anyway, even less the RTSP servers that do HTTP
1830 * tunneling
1831 * - sending the whole POST data until getting a 401 reply specifying
1832 * what authentication method to use, then resending all that data
1833 * - waiting for potential 401 replies directly after sending the
1834 * POST header (waiting for some unspecified time)
1835 * Therefore, we copy the full auth state, which works for both basic
1836 * and digest. (For digest, we would have to synchronize the nonce
1837 * count variable between the two sessions, if we'd do more requests
1838 * with the original session, though.)
1839 */
1840 ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1841
1842 /* complete the connection */
1843 if (ffurl_connect(rt->rtsp_hd_out, &options)) {
1844 av_dict_free(&options);
1845 err = AVERROR(EIO);
1846 goto fail;
1847 }
1848 av_dict_free(&options);
1849 } else {
1850 int ret;
1851 /* open the tcp connection */
1852 ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
1853 host, port,
1854 "?timeout=%d", rt->stimeout);
1855 if ((ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1856 &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL)) < 0) {
1857 err = ret;
1858 goto fail;
1859 }
1860 rt->rtsp_hd_out = rt->rtsp_hd;
1861 }
1862 rt->seq = 0;
1863
1864 tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1865 if (tcp_fd < 0) {
1866 err = tcp_fd;
1867 goto fail;
1868 }
1869 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1870 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1871 NULL, 0, NI_NUMERICHOST);
1872 }
1873
1874 /* request options supported by the server; this also detects server
1875 * type */
1876 for (rt->server_type = RTSP_SERVER_RTP;;) {
1877 cmd[0] = 0;
1878 if (rt->server_type == RTSP_SERVER_REAL)
1879 av_strlcat(cmd,
1880 /*
1881 * The following entries are required for proper
1882 * streaming from a Realmedia server. They are
1883 * interdependent in some way although we currently
1884 * don't quite understand how. Values were copied
1885 * from mplayer SVN r23589.
1886 * ClientChallenge is a 16-byte ID in hex
1887 * CompanyID is a 16-byte ID in base64
1888 */
1889 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1890 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1891 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1892 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1893 sizeof(cmd));
1894 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1895 if (reply->status_code != RTSP_STATUS_OK) {
1896 err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
1897 goto fail;
1898 }
1899
1900 /* detect server type if not standard-compliant RTP */
1901 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1902 rt->server_type = RTSP_SERVER_REAL;
1903 continue;
1904 } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1905 rt->server_type = RTSP_SERVER_WMS;
1906 } else if (rt->server_type == RTSP_SERVER_REAL)
1907 strcpy(real_challenge, reply->real_challenge);
1908 break;
1909 }
1910
1911 if (CONFIG_RTSP_DEMUXER && s->iformat)
1912 err = ff_rtsp_setup_input_streams(s, reply);
1913 else if (CONFIG_RTSP_MUXER)
1914 err = ff_rtsp_setup_output_streams(s, host);
1915 else
1916 av_assert0(0);
1917 if (err)
1918 goto fail;
1919
1920 do {
1921 int lower_transport = ff_log2_tab[lower_transport_mask &
1922 ~(lower_transport_mask - 1)];
1923
1924 if ((lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP))
1925 && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP))
1926 lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1927
1928 err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1929 rt->server_type == RTSP_SERVER_REAL ?
1930 real_challenge : NULL);
1931 if (err < 0)
1932 goto fail;
1933 lower_transport_mask &= ~(1 << lower_transport);
1934 if (lower_transport_mask == 0 && err == 1) {
1935 err = AVERROR(EPROTONOSUPPORT);
1936 goto fail;
1937 }
1938 } while (err);
1939
1940 rt->lower_transport_mask = lower_transport_mask;
1941 av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1942 rt->state = RTSP_STATE_IDLE;
1943 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1944 return 0;
1945 fail:
1946 ff_rtsp_close_streams(s);
1947 ff_rtsp_close_connections(s);
1948 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1949 char *new_url = av_strdup(reply->location);
1950 if (!new_url) {
1951 err = AVERROR(ENOMEM);
1952 goto fail2;
1953 }
1954 ff_format_set_url(s, new_url);
1955 rt->session_id[0] = '\0';
1956 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1957 reply->status_code,
1958 s->url);
1959 goto redirect;
1960 }
1961 fail2:
1962 ff_network_close();
1963 return err;
1964 }
1965 #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1966
1967 #if CONFIG_RTPDEC
1968 static int parse_rtsp_message(AVFormatContext *s)
1969 {
1970 RTSPState *rt = s->priv_data;
1971 int ret;
1972
1973 if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
1974 if (rt->state == RTSP_STATE_STREAMING) {
1975 if (!ff_rtsp_parse_streaming_commands(s))
1976 return AVERROR_EOF;
1977 else
1978 av_log(s, AV_LOG_WARNING,
1979 "Unable to answer to TEARDOWN\n");
1980 } else
1981 return 0;
1982 } else {
1983 RTSPMessageHeader reply;
1984 ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1985 if (ret < 0)
1986 return ret;
1987 /* XXX: parse message */
1988 if (rt->state != RTSP_STATE_STREAMING)
1989 return 0;
1990 }
1991
1992 return 0;
1993 }
1994
1995 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1996 uint8_t *buf, int buf_size, int64_t wait_end)
1997 {
1998 RTSPState *rt = s->priv_data;
1999 RTSPStream *rtsp_st;
2000 int n, i, ret, timeout_cnt = 0;
2001 struct pollfd *p = rt->p;
2002 int *fds = NULL, fdsnum, fdsidx;
2003
2004 if (!p) {
2005 p = rt->p = av_malloc_array(2 * (rt->nb_rtsp_streams + 1), sizeof(struct pollfd));
2006 if (!p)
2007 return AVERROR(ENOMEM);
2008
2009 if (rt->rtsp_hd) {
2010 p[rt->max_p].fd = ffurl_get_file_handle(rt->rtsp_hd);
2011 p[rt->max_p++].events = POLLIN;
2012 }
2013 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2014 rtsp_st = rt->rtsp_streams[i];
2015 if (rtsp_st->rtp_handle) {
2016 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
2017 &fds, &fdsnum)) {
2018 av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
2019 return ret;
2020 }
2021 if (fdsnum != 2) {
2022 av_log(s, AV_LOG_ERROR,
2023 "Number of fds %d not supported\n", fdsnum);
2024 return AVERROR_INVALIDDATA;
2025 }
2026 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
2027 p[rt->max_p].fd = fds[fdsidx];
2028 p[rt->max_p++].events = POLLIN;
2029 }
2030 av_freep(&fds);
2031 }
2032 }
2033 }
2034
2035 for (;;) {
2036 if (ff_check_interrupt(&s->interrupt_callback))
2037 return AVERROR_EXIT;
2038 if (wait_end && wait_end - av_gettime_relative() < 0)
2039 return AVERROR(EAGAIN);
2040 n = poll(p, rt->max_p, POLL_TIMEOUT_MS);
2041 if (n > 0) {
2042 int j = rt->rtsp_hd ? 1 : 0;
2043 timeout_cnt = 0;
2044 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2045 rtsp_st = rt->rtsp_streams[i];
2046 if (rtsp_st->rtp_handle) {
2047 if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
2048 ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
2049 if (ret > 0) {
2050 *prtsp_st = rtsp_st;
2051 return ret;
2052 }
2053 }
2054 j+=2;
2055 }
2056 }
2057 #if CONFIG_RTSP_DEMUXER
2058 if (rt->rtsp_hd && p[0].revents & POLLIN) {
2059 if ((ret = parse_rtsp_message(s)) < 0) {
2060 return ret;
2061 }
2062 }
2063 #endif
2064 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
2065 return AVERROR(ETIMEDOUT);
2066 } else if (n < 0 && errno != EINTR)
2067 return AVERROR(errno);
2068 }
2069 }
2070
2071 static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
2072 const uint8_t *buf, int len)
2073 {
2074 RTSPState *rt = s->priv_data;
2075 int i;
2076 if (len < 0)
2077 return len;
2078 if (rt->nb_rtsp_streams == 1) {
2079 *rtsp_st = rt->rtsp_streams[0];
2080 return len;
2081 }
2082 if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
2083 if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
2084 int no_ssrc = 0;
2085 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2086 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2087 if (!rtpctx)
2088 continue;
2089 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
2090 *rtsp_st = rt->rtsp_streams[i];
2091 return len;
2092 }
2093 if (!rtpctx->ssrc)
2094 no_ssrc = 1;
2095 }
2096 if (no_ssrc) {
2097 av_log(s, AV_LOG_WARNING,
2098 "Unable to pick stream for packet - SSRC not known for "
2099 "all streams\n");
2100 return AVERROR(EAGAIN);
2101 }
2102 } else {
2103 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2104 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
2105 *rtsp_st = rt->rtsp_streams[i];
2106 return len;
2107 }
2108 }
2109 }
2110 }
2111 av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
2112 return AVERROR(EAGAIN);
2113 }
2114
2115 static int read_packet(AVFormatContext *s,
2116 RTSPStream **rtsp_st, RTSPStream *first_queue_st,
2117 int64_t wait_end)
2118 {
2119 RTSPState *rt = s->priv_data;
2120 int len;
2121
2122 switch(rt->lower_transport) {
2123 default:
2124 #if CONFIG_RTSP_DEMUXER
2125 case RTSP_LOWER_TRANSPORT_TCP:
2126 len = ff_rtsp_tcp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2127 break;
2128 #endif
2129 case RTSP_LOWER_TRANSPORT_UDP:
2130 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
2131 len = udp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2132 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2133 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, (*rtsp_st)->rtp_handle, NULL, len);
2134 break;
2135 case RTSP_LOWER_TRANSPORT_CUSTOM:
2136 if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
2137 wait_end && wait_end < av_gettime_relative())
2138 len = AVERROR(EAGAIN);
2139 else
2140 len = avio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2141 len = pick_stream(s, rtsp_st, rt->recvbuf, len);
2142 if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2143 ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, NULL, s->pb, len);
2144 break;
2145 }
2146
2147 if (len == 0)
2148 return AVERROR_EOF;
2149
2150 return len;
2151 }
2152
2153 int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
2154 {
2155 RTSPState *rt = s->priv_data;
2156 int ret, len;
2157 RTSPStream *rtsp_st, *first_queue_st = NULL;
2158 int64_t wait_end = 0;
2159
2160 if (rt->nb_byes == rt->nb_rtsp_streams)
2161 return AVERROR_EOF;
2162
2163 /* get next frames from the same RTP packet */
2164 if (rt->cur_transport_priv) {
2165 if (rt->transport == RTSP_TRANSPORT_RDT) {
2166 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2167 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2168 ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
2169 } else if (CONFIG_RTPDEC && rt->ts) {
2170 ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
2171 if (ret >= 0) {
2172 rt->recvbuf_pos += ret;
2173 ret = rt->recvbuf_pos < rt->recvbuf_len;
2174 }
2175 } else
2176 ret = -1;
2177 if (ret == 0) {
2178 rt->cur_transport_priv = NULL;
2179 return 0;
2180 } else if (ret == 1) {
2181 return 0;
2182 } else
2183 rt->cur_transport_priv = NULL;
2184 }
2185
2186 redo:
2187 if (rt->transport == RTSP_TRANSPORT_RTP) {
2188 int i;
2189 int64_t first_queue_time = 0;
2190 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2191 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
2192 int64_t queue_time;
2193 if (!rtpctx)
2194 continue;
2195 queue_time = ff_rtp_queued_packet_time(rtpctx);
2196 if (queue_time && (queue_time - first_queue_time < 0 ||
2197 !first_queue_time)) {
2198 first_queue_time = queue_time;
2199 first_queue_st = rt->rtsp_streams[i];
2200 }
2201 }
2202 if (first_queue_time) {
2203 wait_end = first_queue_time + s->max_delay;
2204 } else {
2205 wait_end = 0;
2206 first_queue_st = NULL;
2207 }
2208 }
2209
2210 /* read next RTP packet */
2211 if (!rt->recvbuf) {
2212 rt->recvbuf = av_malloc(RECVBUF_SIZE);
2213 if (!rt->recvbuf)
2214 return AVERROR(ENOMEM);
2215 }
2216
2217 len = read_packet(s, &rtsp_st, first_queue_st, wait_end);
2218 if (len == AVERROR(EAGAIN) && first_queue_st &&
2219 rt->transport == RTSP_TRANSPORT_RTP) {
2220 av_log(s, AV_LOG_WARNING,
2221 "max delay reached. need to consume packet\n");
2222 rtsp_st = first_queue_st;
2223 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
2224 goto end;
2225 }
2226 if (len < 0)
2227 return len;
2228
2229 if (rt->transport == RTSP_TRANSPORT_RDT) {
2230 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2231 } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2232 ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2233 if (rtsp_st->feedback) {
2234 AVIOContext *pb = NULL;
2235 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
2236 pb = s->pb;
2237 ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
2238 }
2239 if (ret < 0) {
2240 /* Either bad packet, or a RTCP packet. Check if the
2241 * first_rtcp_ntp_time field was initialized. */
2242 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
2243 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
2244 /* first_rtcp_ntp_time has been initialized for this stream,
2245 * copy the same value to all other uninitialized streams,
2246 * in order to map their timestamp origin to the same ntp time
2247 * as this one. */
2248 int i;
2249 AVStream *st = NULL;
2250 if (rtsp_st->stream_index >= 0)
2251 st = s->streams[rtsp_st->stream_index];
2252 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2253 RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
2254 AVStream *st2 = NULL;
2255 if (rt->rtsp_streams[i]->stream_index >= 0)
2256 st2 = s->streams[rt->rtsp_streams[i]->stream_index];
2257 if (rtpctx2 && st && st2 &&
2258 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2259 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
2260 rtpctx2->rtcp_ts_offset = av_rescale_q(
2261 rtpctx->rtcp_ts_offset, st->time_base,
2262 st2->time_base);
2263 }
2264 }
2265 // Make real NTP start time available in AVFormatContext
2266 if (s->start_time_realtime == AV_NOPTS_VALUE) {
2267 s->start_time_realtime = av_rescale (rtpctx->first_rtcp_ntp_time - (NTP_OFFSET << 32), 1000000, 1LL << 32);
2268 if (rtpctx->st) {
2269 s->start_time_realtime -=
2270 av_rescale (rtpctx->rtcp_ts_offset,
2271 (uint64_t) rtpctx->st->time_base.num * 1000000,
2272 rtpctx->st->time_base.den);
2273 }
2274 }
2275 }
2276 if (ret == -RTCP_BYE) {
2277 rt->nb_byes++;
2278
2279 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
2280 rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
2281
2282 if (rt->nb_byes == rt->nb_rtsp_streams)
2283 return AVERROR_EOF;
2284 }
2285 }
2286 } else if (CONFIG_RTPDEC && rt->ts) {
2287 ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
2288 if (ret >= 0) {
2289 if (ret < len) {
2290 rt->recvbuf_len = len;
2291 rt->recvbuf_pos = ret;
2292 rt->cur_transport_priv = rt->ts;
2293 return 1;
2294 } else {
2295 ret = 0;
2296 }
2297 }
2298 } else {
2299 return AVERROR_INVALIDDATA;
2300 }
2301 end:
2302 if (ret < 0)
2303 goto redo;
2304 if (ret == 1)
2305 /* more packets may follow, so we save the RTP context */
2306 rt->cur_transport_priv = rtsp_st->transport_priv;
2307
2308 return ret;
2309 }
2310 #endif /* CONFIG_RTPDEC */
2311
2312 #if CONFIG_SDP_DEMUXER
2313 static int sdp_probe(const AVProbeData *p1)
2314 {
2315 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2316
2317 /* we look for a line beginning "c=IN IP" */
2318 while (p < p_end && *p != '\0') {
2319 if (sizeof("c=IN IP") - 1 < p_end - p &&
2320 av_strstart(p, "c=IN IP", NULL))
2321 return AVPROBE_SCORE_EXTENSION;
2322
2323 while (p < p_end - 1 && *p != '\n') p++;
2324 if (++p >= p_end)
2325 break;
2326 if (*p == '\r')
2327 p++;
2328 }
2329 return 0;
2330 }
2331
2332 static void append_source_addrs(char *buf, int size, const char *name,
2333 int count, struct RTSPSource **addrs)
2334 {
2335 int i;
2336 if (!count)
2337 return;
2338 av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
2339 for (i = 1; i < count; i++)
2340 av_strlcatf(buf, size, ",%s", addrs[i]->addr);
2341 }
2342
2343 static int sdp_read_header(AVFormatContext *s)
2344 {
2345 RTSPState *rt = s->priv_data;
2346 RTSPStream *rtsp_st;
2347 int size, i, err;
2348 char *content;
2349 char url[1024];
2350
2351 if (!ff_network_init())
2352 return AVERROR(EIO);
2353
2354 if (s->max_delay < 0) /* Not set by the caller */
2355 s->max_delay = DEFAULT_REORDERING_DELAY;
2356 if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
2357 rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
2358
2359 /* read the whole sdp file */
2360 /* XXX: better loading */
2361 content = av_malloc(SDP_MAX_SIZE);
2362 if (!content)
2363 return AVERROR(ENOMEM);
2364 size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
2365 if (size <= 0) {
2366 av_free(content);
2367 return AVERROR_INVALIDDATA;
2368 }
2369 content[size] ='\0';
2370
2371 err = ff_sdp_parse(s, content);
2372 av_freep(&content);
2373 if (err) goto fail;
2374
2375 /* open each RTP stream */
2376 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2377 char namebuf[50];
2378 rtsp_st = rt->rtsp_streams[i];
2379
2380 if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
2381 AVDictionary *opts = map_to_opts(rt);
2382
2383 err = getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip,
2384 sizeof(rtsp_st->sdp_ip),
2385 namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
2386 if (err) {
2387 av_log(s, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(err));
2388 err = AVERROR(EIO);
2389 av_dict_free(&opts);
2390 goto fail;
2391 }
2392 ff_url_join(url, sizeof(url), "rtp", NULL,
2393 namebuf, rtsp_st->sdp_port,
2394 "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
2395 rtsp_st->sdp_port, rtsp_st->sdp_ttl,
2396 rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
2397 rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
2398
2399 append_source_addrs(url, sizeof(url), "sources",
2400 rtsp_st->nb_include_source_addrs,
2401 rtsp_st->include_source_addrs);
2402 append_source_addrs(url, sizeof(url), "block",
2403 rtsp_st->nb_exclude_source_addrs,
2404 rtsp_st->exclude_source_addrs);
2405 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ,
2406 &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
2407
2408 av_dict_free(&opts);
2409
2410 if (err < 0) {
2411 err = AVERROR_INVALIDDATA;
2412 goto fail;
2413 }
2414 }
2415 if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2416 goto fail;
2417 }
2418 return 0;
2419 fail:
2420 ff_rtsp_close_streams(s);
2421 ff_network_close();
2422 return err;
2423 }
2424
2425 static int sdp_read_close(AVFormatContext *s)
2426 {
2427 ff_rtsp_close_streams(s);
2428 ff_network_close();
2429 return 0;
2430 }
2431
2432 static const AVClass sdp_demuxer_class = {
2433 .class_name = "SDP demuxer",
2434 .item_name = av_default_item_name,
2435 .option = sdp_options,
2436 .version = LIBAVUTIL_VERSION_INT,
2437 };
2438
2439 AVInputFormat ff_sdp_demuxer = {
2440 .name = "sdp",
2441 .long_name = NULL_IF_CONFIG_SMALL("SDP"),
2442 .priv_data_size = sizeof(RTSPState),
2443 .read_probe = sdp_probe,
2444 .read_header = sdp_read_header,
2445 .read_packet = ff_rtsp_fetch_packet,
2446 .read_close = sdp_read_close,
2447 .priv_class = &sdp_demuxer_class,
2448 };
2449 #endif /* CONFIG_SDP_DEMUXER */
2450
2451 #if CONFIG_RTP_DEMUXER
2452 static int rtp_probe(const AVProbeData *p)
2453 {
2454 if (av_strstart(p->filename, "rtp:", NULL))
2455 return AVPROBE_SCORE_MAX;
2456 return 0;
2457 }
2458
2459 static int rtp_read_header(AVFormatContext *s)
2460 {
2461 uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
2462 char host[500], filters_buf[1000];
2463 int ret, port;
2464 URLContext* in = NULL;
2465 int payload_type;
2466 AVCodecParameters *par = NULL;
2467 struct sockaddr_storage addr;
2468 AVIOContext pb;
2469 socklen_t addrlen = sizeof(addr);
2470 RTSPState *rt = s->priv_data;
2471 const char *p;
2472 AVBPrint sdp;
2473
2474 if (!ff_network_init())
2475 return AVERROR(EIO);
2476
2477 ret = ffurl_open_whitelist(&in, s->url, AVIO_FLAG_READ,
2478 &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL);
2479 if (ret)
2480 goto fail;
2481
2482 while (1) {
2483 ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2484 if (ret == AVERROR(EAGAIN))
2485 continue;
2486 if (ret < 0)
2487 goto fail;
2488 if (ret < 12) {
2489 av_log(s, AV_LOG_WARNING, "Received too short packet\n");
2490 continue;
2491 }
2492
2493 if ((recvbuf[0] & 0xc0) != 0x80) {
2494 av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
2495 "received\n");
2496 continue;
2497 }
2498
2499 if (RTP_PT_IS_RTCP(recvbuf[1]))
2500 continue;
2501
2502 payload_type = recvbuf[1] & 0x7f;
2503 break;
2504 }
2505 getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2506 ffurl_closep(&in);
2507
2508 par = avcodec_parameters_alloc();
2509 if (!par) {
2510 ret = AVERROR(ENOMEM);
2511 goto fail;
2512 }
2513
2514 if (ff_rtp_get_codec_info(par, payload_type)) {
2515 av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
2516 "without an SDP file describing it\n",
2517 payload_type);
2518 goto fail;
2519 }
2520 if (par->codec_type != AVMEDIA_TYPE_DATA) {
2521 av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
2522 "properly you need an SDP file "
2523 "describing it\n");
2524 }
2525
2526 av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
2527 NULL, 0, s->url);
2528
2529 av_bprint_init(&sdp, 0, AV_BPRINT_SIZE_UNLIMITED);
2530 av_bprintf(&sdp, "v=0\r\nc=IN IP%d %s\r\n",
2531 addr.ss_family == AF_INET ? 4 : 6, host);
2532
2533 p = strchr(s->url, '?');
2534 if (p) {
2535 static const char filters[][2][8] = { { "sources", "incl" },
2536 { "block", "excl" } };
2537 int i;
2538 char *q;
2539 for (i = 0; i < FF_ARRAY_ELEMS(filters); i++) {
2540 if (av_find_info_tag(filters_buf, sizeof(filters_buf), filters[i][0], p)) {
2541 q = filters_buf;
2542 while ((q = strchr(q, ',')) != NULL)
2543 *q = ' ';
2544 av_bprintf(&sdp, "a=source-filter:%s IN IP%d %s %s\r\n",
2545 filters[i][1],
2546 addr.ss_family == AF_INET ? 4 : 6, host,
2547 filters_buf);
2548 }
2549 }
2550 }
2551
2552 av_bprintf(&sdp, "m=%s %d RTP/AVP %d\r\n",
2553 par->codec_type == AVMEDIA_TYPE_DATA ? "application" :
2554 par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
2555 port, payload_type);
2556 av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp.str);
2557 if (!av_bprint_is_complete(&sdp))
2558 goto fail_nobuf;
2559 avcodec_parameters_free(&par);
2560
2561 ffio_init_context(&pb, sdp.str, sdp.len, 0, NULL, NULL, NULL, NULL);
2562 s->pb = &pb;
2563
2564 /* sdp_read_header initializes this again */
2565 ff_network_close();
2566
2567 rt->media_type_mask = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1;
2568
2569 ret = sdp_read_header(s);
2570 s->pb = NULL;
2571 av_bprint_finalize(&sdp, NULL);
2572 return ret;
2573
2574 fail_nobuf:
2575 ret = AVERROR(ENOMEM);
2576 av_log(s, AV_LOG_ERROR, "rtp_read_header(): not enough buffer space for sdp-headers\n");
2577 av_bprint_finalize(&sdp, NULL);
2578 fail:
2579 avcodec_parameters_free(&par);
2580 ffurl_closep(&in);
2581 ff_network_close();
2582 return ret;
2583 }
2584
2585 static const AVClass rtp_demuxer_class = {
2586 .class_name = "RTP demuxer",
2587 .item_name = av_default_item_name,
2588 .option = rtp_options,
2589 .version = LIBAVUTIL_VERSION_INT,
2590 };
2591
2592 AVInputFormat ff_rtp_demuxer = {
2593 .name = "rtp",
2594 .long_name = NULL_IF_CONFIG_SMALL("RTP input"),
2595 .priv_data_size = sizeof(RTSPState),
2596 .read_probe = rtp_probe,
2597 .read_header = rtp_read_header,
2598 .read_packet = ff_rtsp_fetch_packet,
2599 .read_close = sdp_read_close,
2600 .flags = AVFMT_NOFILE,
2601 .priv_class = &rtp_demuxer_class,
2602 };
2603 #endif /* CONFIG_RTP_DEMUXER */
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