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2ba45a60 DM |
1 | /* |
2 | * RTSP demuxer | |
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/avstring.h" | |
23 | #include "libavutil/intreadwrite.h" | |
24 | #include "libavutil/mathematics.h" | |
25 | #include "libavutil/random_seed.h" | |
26 | #include "libavutil/time.h" | |
27 | #include "avformat.h" | |
28 | ||
29 | #include "internal.h" | |
30 | #include "network.h" | |
31 | #include "os_support.h" | |
32 | #include "rtpproto.h" | |
33 | #include "rtsp.h" | |
34 | #include "rdt.h" | |
35 | #include "url.h" | |
36 | ||
37 | static const struct RTSPStatusMessage { | |
38 | enum RTSPStatusCode code; | |
39 | const char *message; | |
40 | } status_messages[] = { | |
41 | { RTSP_STATUS_OK, "OK" }, | |
42 | { RTSP_STATUS_METHOD, "Method Not Allowed" }, | |
43 | { RTSP_STATUS_BANDWIDTH, "Not Enough Bandwidth" }, | |
44 | { RTSP_STATUS_SESSION, "Session Not Found" }, | |
45 | { RTSP_STATUS_STATE, "Method Not Valid in This State" }, | |
46 | { RTSP_STATUS_AGGREGATE, "Aggregate operation not allowed" }, | |
47 | { RTSP_STATUS_ONLY_AGGREGATE, "Only aggregate operation allowed" }, | |
48 | { RTSP_STATUS_TRANSPORT, "Unsupported transport" }, | |
49 | { RTSP_STATUS_INTERNAL, "Internal Server Error" }, | |
50 | { RTSP_STATUS_SERVICE, "Service Unavailable" }, | |
51 | { RTSP_STATUS_VERSION, "RTSP Version not supported" }, | |
52 | { 0, "NULL" } | |
53 | }; | |
54 | ||
55 | static int rtsp_read_close(AVFormatContext *s) | |
56 | { | |
57 | RTSPState *rt = s->priv_data; | |
58 | ||
59 | if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) | |
60 | ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL); | |
61 | ||
62 | ff_rtsp_close_streams(s); | |
63 | ff_rtsp_close_connections(s); | |
64 | ff_network_close(); | |
65 | rt->real_setup = NULL; | |
66 | av_freep(&rt->real_setup_cache); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | static inline int read_line(AVFormatContext *s, char *rbuf, const int rbufsize, | |
71 | int *rbuflen) | |
72 | { | |
73 | RTSPState *rt = s->priv_data; | |
74 | int idx = 0; | |
75 | int ret = 0; | |
76 | *rbuflen = 0; | |
77 | ||
78 | do { | |
79 | ret = ffurl_read_complete(rt->rtsp_hd, rbuf + idx, 1); | |
80 | if (ret <= 0) | |
81 | return ret ? ret : AVERROR_EOF; | |
82 | if (rbuf[idx] == '\r') { | |
83 | /* Ignore */ | |
84 | } else if (rbuf[idx] == '\n') { | |
85 | rbuf[idx] = '\0'; | |
86 | *rbuflen = idx; | |
87 | return 0; | |
88 | } else | |
89 | idx++; | |
90 | } while (idx < rbufsize); | |
91 | av_log(s, AV_LOG_ERROR, "Message too long\n"); | |
92 | return AVERROR(EIO); | |
93 | } | |
94 | ||
95 | static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code, | |
96 | const char *extracontent, uint16_t seq) | |
97 | { | |
98 | RTSPState *rt = s->priv_data; | |
99 | char message[4096]; | |
100 | int index = 0; | |
101 | while (status_messages[index].code) { | |
102 | if (status_messages[index].code == code) { | |
103 | snprintf(message, sizeof(message), "RTSP/1.0 %d %s\r\n", | |
104 | code, status_messages[index].message); | |
105 | break; | |
106 | } | |
107 | index++; | |
108 | } | |
109 | if (!status_messages[index].code) | |
110 | return AVERROR(EINVAL); | |
111 | av_strlcatf(message, sizeof(message), "CSeq: %d\r\n", seq); | |
112 | av_strlcatf(message, sizeof(message), "Server: %s\r\n", LIBAVFORMAT_IDENT); | |
113 | if (extracontent) | |
114 | av_strlcat(message, extracontent, sizeof(message)); | |
115 | av_strlcat(message, "\r\n", sizeof(message)); | |
116 | av_dlog(s, "Sending response:\n%s", message); | |
117 | ffurl_write(rt->rtsp_hd, message, strlen(message)); | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | static inline int check_sessionid(AVFormatContext *s, | |
123 | RTSPMessageHeader *request) | |
124 | { | |
125 | RTSPState *rt = s->priv_data; | |
126 | unsigned char *session_id = rt->session_id; | |
127 | if (!session_id[0]) { | |
128 | av_log(s, AV_LOG_WARNING, "There is no session-id at the moment\n"); | |
129 | return 0; | |
130 | } | |
131 | if (strcmp(session_id, request->session_id)) { | |
132 | av_log(s, AV_LOG_ERROR, "Unexpected session-id %s\n", | |
133 | request->session_id); | |
134 | rtsp_send_reply(s, RTSP_STATUS_SESSION, NULL, request->seq); | |
135 | return AVERROR_STREAM_NOT_FOUND; | |
136 | } | |
137 | return 0; | |
138 | } | |
139 | ||
140 | static inline int rtsp_read_request(AVFormatContext *s, | |
141 | RTSPMessageHeader *request, | |
142 | const char *method) | |
143 | { | |
144 | RTSPState *rt = s->priv_data; | |
145 | char rbuf[1024]; | |
146 | int rbuflen, ret; | |
147 | do { | |
148 | ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); | |
149 | if (ret) | |
150 | return ret; | |
151 | if (rbuflen > 1) { | |
152 | av_dlog(s, "Parsing[%d]: %s\n", rbuflen, rbuf); | |
153 | ff_rtsp_parse_line(request, rbuf, rt, method); | |
154 | } | |
155 | } while (rbuflen > 0); | |
156 | if (request->seq != rt->seq + 1) { | |
157 | av_log(s, AV_LOG_ERROR, "Unexpected Sequence number %d\n", | |
158 | request->seq); | |
159 | return AVERROR(EINVAL); | |
160 | } | |
161 | if (rt->session_id[0] && strcmp(method, "OPTIONS")) { | |
162 | ret = check_sessionid(s, request); | |
163 | if (ret) | |
164 | return ret; | |
165 | } | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | static int rtsp_read_announce(AVFormatContext *s) | |
171 | { | |
172 | RTSPState *rt = s->priv_data; | |
173 | RTSPMessageHeader request = { 0 }; | |
174 | char sdp[4096]; | |
175 | int ret; | |
176 | ||
177 | ret = rtsp_read_request(s, &request, "ANNOUNCE"); | |
178 | if (ret) | |
179 | return ret; | |
180 | rt->seq++; | |
181 | if (strcmp(request.content_type, "application/sdp")) { | |
182 | av_log(s, AV_LOG_ERROR, "Unexpected content type %s\n", | |
183 | request.content_type); | |
184 | rtsp_send_reply(s, RTSP_STATUS_SERVICE, NULL, request.seq); | |
185 | return AVERROR_OPTION_NOT_FOUND; | |
186 | } | |
187 | if (request.content_length && request.content_length < sizeof(sdp) - 1) { | |
188 | /* Read SDP */ | |
189 | if (ffurl_read_complete(rt->rtsp_hd, sdp, request.content_length) | |
190 | < request.content_length) { | |
191 | av_log(s, AV_LOG_ERROR, | |
192 | "Unable to get complete SDP Description in ANNOUNCE\n"); | |
193 | rtsp_send_reply(s, RTSP_STATUS_INTERNAL, NULL, request.seq); | |
194 | return AVERROR(EIO); | |
195 | } | |
196 | sdp[request.content_length] = '\0'; | |
197 | av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp); | |
198 | ret = ff_sdp_parse(s, sdp); | |
199 | if (ret) | |
200 | return ret; | |
201 | rtsp_send_reply(s, RTSP_STATUS_OK, NULL, request.seq); | |
202 | return 0; | |
203 | } | |
204 | av_log(s, AV_LOG_ERROR, | |
205 | "Content-Length header value exceeds sdp allocated buffer (4KB)\n"); | |
206 | rtsp_send_reply(s, RTSP_STATUS_INTERNAL, | |
207 | "Content-Length exceeds buffer size", request.seq); | |
208 | return AVERROR(EIO); | |
209 | } | |
210 | ||
211 | static int rtsp_read_options(AVFormatContext *s) | |
212 | { | |
213 | RTSPState *rt = s->priv_data; | |
214 | RTSPMessageHeader request = { 0 }; | |
215 | int ret = 0; | |
216 | ||
217 | /* Parsing headers */ | |
218 | ret = rtsp_read_request(s, &request, "OPTIONS"); | |
219 | if (ret) | |
220 | return ret; | |
221 | rt->seq++; | |
222 | /* Send Reply */ | |
223 | rtsp_send_reply(s, RTSP_STATUS_OK, | |
224 | "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD\r\n", | |
225 | request.seq); | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl) | |
230 | { | |
231 | RTSPState *rt = s->priv_data; | |
232 | RTSPMessageHeader request = { 0 }; | |
233 | int ret = 0; | |
234 | char url[1024]; | |
235 | RTSPStream *rtsp_st; | |
236 | char responseheaders[1024]; | |
237 | int localport = -1; | |
238 | int transportidx = 0; | |
239 | int streamid = 0; | |
240 | ||
241 | ret = rtsp_read_request(s, &request, "SETUP"); | |
242 | if (ret) | |
243 | return ret; | |
244 | rt->seq++; | |
245 | if (!request.nb_transports) { | |
246 | av_log(s, AV_LOG_ERROR, "No transport defined in SETUP\n"); | |
247 | return AVERROR_INVALIDDATA; | |
248 | } | |
249 | for (transportidx = 0; transportidx < request.nb_transports; | |
250 | transportidx++) { | |
251 | if (!request.transports[transportidx].mode_record || | |
252 | (request.transports[transportidx].lower_transport != | |
253 | RTSP_LOWER_TRANSPORT_UDP && | |
254 | request.transports[transportidx].lower_transport != | |
255 | RTSP_LOWER_TRANSPORT_TCP)) { | |
256 | av_log(s, AV_LOG_ERROR, "mode=record/receive not set or transport" | |
257 | " protocol not supported (yet)\n"); | |
258 | return AVERROR_INVALIDDATA; | |
259 | } | |
260 | } | |
261 | if (request.nb_transports > 1) | |
262 | av_log(s, AV_LOG_WARNING, "More than one transport not supported, " | |
263 | "using first of all\n"); | |
264 | for (streamid = 0; streamid < rt->nb_rtsp_streams; streamid++) { | |
265 | if (!strcmp(rt->rtsp_streams[streamid]->control_url, | |
266 | controlurl)) | |
267 | break; | |
268 | } | |
269 | if (streamid == rt->nb_rtsp_streams) { | |
270 | av_log(s, AV_LOG_ERROR, "Unable to find requested track\n"); | |
271 | return AVERROR_STREAM_NOT_FOUND; | |
272 | } | |
273 | rtsp_st = rt->rtsp_streams[streamid]; | |
274 | localport = rt->rtp_port_min; | |
275 | ||
276 | if (request.transports[0].lower_transport == RTSP_LOWER_TRANSPORT_TCP) { | |
277 | rt->lower_transport = RTSP_LOWER_TRANSPORT_TCP; | |
278 | if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { | |
279 | rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); | |
280 | return ret; | |
281 | } | |
282 | rtsp_st->interleaved_min = request.transports[0].interleaved_min; | |
283 | rtsp_st->interleaved_max = request.transports[0].interleaved_max; | |
284 | snprintf(responseheaders, sizeof(responseheaders), "Transport: " | |
285 | "RTP/AVP/TCP;unicast;mode=receive;interleaved=%d-%d" | |
286 | "\r\n", request.transports[0].interleaved_min, | |
287 | request.transports[0].interleaved_max); | |
288 | } else { | |
289 | do { | |
290 | ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL); | |
291 | av_dlog(s, "Opening: %s", url); | |
292 | ret = ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE, | |
293 | &s->interrupt_callback, NULL); | |
294 | if (ret) | |
295 | localport += 2; | |
296 | } while (ret || localport > rt->rtp_port_max); | |
297 | if (localport > rt->rtp_port_max) { | |
298 | rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); | |
299 | return ret; | |
300 | } | |
301 | ||
302 | av_dlog(s, "Listening on: %d", | |
303 | ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle)); | |
304 | if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { | |
305 | rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); | |
306 | return ret; | |
307 | } | |
308 | ||
309 | localport = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle); | |
310 | snprintf(responseheaders, sizeof(responseheaders), "Transport: " | |
311 | "RTP/AVP/UDP;unicast;mode=receive;source=%s;" | |
312 | "client_port=%d-%d;server_port=%d-%d\r\n", | |
313 | host, request.transports[0].client_port_min, | |
314 | request.transports[0].client_port_max, localport, | |
315 | localport + 1); | |
316 | } | |
317 | ||
318 | /* Establish sessionid if not previously set */ | |
319 | /* Put this in a function? */ | |
320 | /* RFC 2326: session id must be at least 8 digits */ | |
321 | while (strlen(rt->session_id) < 8) | |
322 | av_strlcatf(rt->session_id, 512, "%u", av_get_random_seed()); | |
323 | ||
324 | av_strlcatf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", | |
325 | rt->session_id); | |
326 | /* Send Reply */ | |
327 | rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); | |
328 | ||
329 | rt->state = RTSP_STATE_PAUSED; | |
330 | return 0; | |
331 | } | |
332 | ||
333 | static int rtsp_read_record(AVFormatContext *s) | |
334 | { | |
335 | RTSPState *rt = s->priv_data; | |
336 | RTSPMessageHeader request = { 0 }; | |
337 | int ret = 0; | |
338 | char responseheaders[1024]; | |
339 | ||
340 | ret = rtsp_read_request(s, &request, "RECORD"); | |
341 | if (ret) | |
342 | return ret; | |
343 | ret = check_sessionid(s, &request); | |
344 | if (ret) | |
345 | return ret; | |
346 | rt->seq++; | |
347 | snprintf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", | |
348 | rt->session_id); | |
349 | rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); | |
350 | ||
351 | rt->state = RTSP_STATE_STREAMING; | |
352 | return 0; | |
353 | } | |
354 | ||
355 | static inline int parse_command_line(AVFormatContext *s, const char *line, | |
356 | int linelen, char *uri, int urisize, | |
357 | char *method, int methodsize, | |
358 | enum RTSPMethod *methodcode) | |
359 | { | |
360 | RTSPState *rt = s->priv_data; | |
361 | const char *linept, *searchlinept; | |
362 | linept = strchr(line, ' '); | |
f6fa7814 | 363 | |
2ba45a60 DM |
364 | if (!linept) { |
365 | av_log(s, AV_LOG_ERROR, "Error parsing method string\n"); | |
366 | return AVERROR_INVALIDDATA; | |
367 | } | |
f6fa7814 | 368 | |
2ba45a60 DM |
369 | if (linept - line > methodsize - 1) { |
370 | av_log(s, AV_LOG_ERROR, "Method string too long\n"); | |
371 | return AVERROR(EIO); | |
372 | } | |
373 | memcpy(method, line, linept - line); | |
374 | method[linept - line] = '\0'; | |
375 | linept++; | |
376 | if (!strcmp(method, "ANNOUNCE")) | |
377 | *methodcode = ANNOUNCE; | |
378 | else if (!strcmp(method, "OPTIONS")) | |
379 | *methodcode = OPTIONS; | |
380 | else if (!strcmp(method, "RECORD")) | |
381 | *methodcode = RECORD; | |
382 | else if (!strcmp(method, "SETUP")) | |
383 | *methodcode = SETUP; | |
384 | else if (!strcmp(method, "PAUSE")) | |
385 | *methodcode = PAUSE; | |
386 | else if (!strcmp(method, "TEARDOWN")) | |
387 | *methodcode = TEARDOWN; | |
388 | else | |
389 | *methodcode = UNKNOWN; | |
390 | /* Check method with the state */ | |
391 | if (rt->state == RTSP_STATE_IDLE) { | |
392 | if ((*methodcode != ANNOUNCE) && (*methodcode != OPTIONS)) { | |
393 | av_log(s, AV_LOG_ERROR, "Unexpected command in Idle State %s\n", | |
394 | line); | |
395 | return AVERROR_PROTOCOL_NOT_FOUND; | |
396 | } | |
397 | } else if (rt->state == RTSP_STATE_PAUSED) { | |
398 | if ((*methodcode != OPTIONS) && (*methodcode != RECORD) | |
399 | && (*methodcode != SETUP)) { | |
400 | av_log(s, AV_LOG_ERROR, "Unexpected command in Paused State %s\n", | |
401 | line); | |
402 | return AVERROR_PROTOCOL_NOT_FOUND; | |
403 | } | |
404 | } else if (rt->state == RTSP_STATE_STREAMING) { | |
405 | if ((*methodcode != PAUSE) && (*methodcode != OPTIONS) | |
406 | && (*methodcode != TEARDOWN)) { | |
407 | av_log(s, AV_LOG_ERROR, "Unexpected command in Streaming State" | |
408 | " %s\n", line); | |
409 | return AVERROR_PROTOCOL_NOT_FOUND; | |
410 | } | |
411 | } else { | |
412 | av_log(s, AV_LOG_ERROR, "Unexpected State [%d]\n", rt->state); | |
413 | return AVERROR_BUG; | |
414 | } | |
415 | ||
416 | searchlinept = strchr(linept, ' '); | |
417 | if (!searchlinept) { | |
418 | av_log(s, AV_LOG_ERROR, "Error parsing message URI\n"); | |
419 | return AVERROR_INVALIDDATA; | |
420 | } | |
421 | if (searchlinept - linept > urisize - 1) { | |
422 | av_log(s, AV_LOG_ERROR, "uri string length exceeded buffer size\n"); | |
423 | return AVERROR(EIO); | |
424 | } | |
425 | memcpy(uri, linept, searchlinept - linept); | |
426 | uri[searchlinept - linept] = '\0'; | |
427 | if (strcmp(rt->control_uri, uri)) { | |
428 | char host[128], path[512], auth[128]; | |
429 | int port; | |
430 | char ctl_host[128], ctl_path[512], ctl_auth[128]; | |
431 | int ctl_port; | |
432 | av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port, | |
433 | path, sizeof(path), uri); | |
434 | av_url_split(NULL, 0, ctl_auth, sizeof(ctl_auth), ctl_host, | |
435 | sizeof(ctl_host), &ctl_port, ctl_path, sizeof(ctl_path), | |
436 | rt->control_uri); | |
437 | if (strcmp(host, ctl_host)) | |
438 | av_log(s, AV_LOG_INFO, "Host %s differs from expected %s\n", | |
439 | host, ctl_host); | |
440 | if (strcmp(path, ctl_path) && *methodcode != SETUP) | |
441 | av_log(s, AV_LOG_WARNING, "WARNING: Path %s differs from expected" | |
442 | " %s\n", path, ctl_path); | |
443 | if (*methodcode == ANNOUNCE) { | |
444 | av_log(s, AV_LOG_INFO, | |
445 | "Updating control URI to %s\n", uri); | |
446 | av_strlcpy(rt->control_uri, uri, sizeof(rt->control_uri)); | |
447 | } | |
448 | } | |
449 | ||
450 | linept = searchlinept + 1; | |
451 | if (!av_strstart(linept, "RTSP/1.0", NULL)) { | |
452 | av_log(s, AV_LOG_ERROR, "Error parsing protocol or version\n"); | |
453 | return AVERROR_PROTOCOL_NOT_FOUND; | |
454 | } | |
455 | return 0; | |
456 | } | |
457 | ||
458 | int ff_rtsp_parse_streaming_commands(AVFormatContext *s) | |
459 | { | |
460 | RTSPState *rt = s->priv_data; | |
461 | unsigned char rbuf[4096]; | |
462 | unsigned char method[10]; | |
463 | char uri[500]; | |
464 | int ret; | |
465 | int rbuflen = 0; | |
466 | RTSPMessageHeader request = { 0 }; | |
467 | enum RTSPMethod methodcode; | |
468 | ||
469 | ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); | |
470 | if (ret < 0) | |
471 | return ret; | |
472 | ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method, | |
473 | sizeof(method), &methodcode); | |
474 | if (ret) { | |
475 | av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n"); | |
476 | return ret; | |
477 | } | |
478 | ||
479 | ret = rtsp_read_request(s, &request, method); | |
480 | if (ret) | |
481 | return ret; | |
482 | rt->seq++; | |
483 | if (methodcode == PAUSE) { | |
484 | rt->state = RTSP_STATE_PAUSED; | |
485 | ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq); | |
486 | // TODO: Missing date header in response | |
487 | } else if (methodcode == OPTIONS) { | |
488 | ret = rtsp_send_reply(s, RTSP_STATUS_OK, | |
489 | "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, " | |
490 | "RECORD\r\n", request.seq); | |
491 | } else if (methodcode == TEARDOWN) { | |
492 | rt->state = RTSP_STATE_IDLE; | |
493 | ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq); | |
494 | return 0; | |
495 | } | |
496 | return ret; | |
497 | } | |
498 | ||
499 | static int rtsp_read_play(AVFormatContext *s) | |
500 | { | |
501 | RTSPState *rt = s->priv_data; | |
502 | RTSPMessageHeader reply1, *reply = &reply1; | |
503 | int i; | |
504 | char cmd[1024]; | |
505 | ||
506 | av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state); | |
507 | rt->nb_byes = 0; | |
508 | ||
509 | if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { | |
510 | if (rt->transport == RTSP_TRANSPORT_RTP) { | |
511 | for (i = 0; i < rt->nb_rtsp_streams; i++) { | |
512 | RTSPStream *rtsp_st = rt->rtsp_streams[i]; | |
513 | RTPDemuxContext *rtpctx = rtsp_st->transport_priv; | |
514 | if (!rtpctx) | |
515 | continue; | |
516 | ff_rtp_reset_packet_queue(rtpctx); | |
517 | rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE; | |
518 | rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE; | |
519 | rtpctx->base_timestamp = 0; | |
520 | rtpctx->timestamp = 0; | |
521 | rtpctx->unwrapped_timestamp = 0; | |
522 | rtpctx->rtcp_ts_offset = 0; | |
523 | } | |
524 | } | |
525 | if (rt->state == RTSP_STATE_PAUSED) { | |
526 | cmd[0] = 0; | |
527 | } else { | |
528 | snprintf(cmd, sizeof(cmd), | |
529 | "Range: npt=%"PRId64".%03"PRId64"-\r\n", | |
530 | rt->seek_timestamp / AV_TIME_BASE, | |
531 | rt->seek_timestamp / (AV_TIME_BASE / 1000) % 1000); | |
532 | } | |
533 | ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL); | |
534 | if (reply->status_code != RTSP_STATUS_OK) { | |
f6fa7814 | 535 | return ff_rtsp_averror(reply->status_code, -1); |
2ba45a60 DM |
536 | } |
537 | if (rt->transport == RTSP_TRANSPORT_RTP && | |
538 | reply->range_start != AV_NOPTS_VALUE) { | |
539 | for (i = 0; i < rt->nb_rtsp_streams; i++) { | |
540 | RTSPStream *rtsp_st = rt->rtsp_streams[i]; | |
541 | RTPDemuxContext *rtpctx = rtsp_st->transport_priv; | |
542 | AVStream *st = NULL; | |
543 | if (!rtpctx || rtsp_st->stream_index < 0) | |
544 | continue; | |
545 | st = s->streams[rtsp_st->stream_index]; | |
546 | rtpctx->range_start_offset = | |
547 | av_rescale_q(reply->range_start, AV_TIME_BASE_Q, | |
548 | st->time_base); | |
549 | } | |
550 | } | |
551 | } | |
552 | rt->state = RTSP_STATE_STREAMING; | |
553 | return 0; | |
554 | } | |
555 | ||
556 | /* pause the stream */ | |
557 | static int rtsp_read_pause(AVFormatContext *s) | |
558 | { | |
559 | RTSPState *rt = s->priv_data; | |
560 | RTSPMessageHeader reply1, *reply = &reply1; | |
561 | ||
562 | if (rt->state != RTSP_STATE_STREAMING) | |
563 | return 0; | |
564 | else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { | |
565 | ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL); | |
566 | if (reply->status_code != RTSP_STATUS_OK) { | |
f6fa7814 | 567 | return ff_rtsp_averror(reply->status_code, -1); |
2ba45a60 DM |
568 | } |
569 | } | |
570 | rt->state = RTSP_STATE_PAUSED; | |
571 | return 0; | |
572 | } | |
573 | ||
574 | int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply) | |
575 | { | |
576 | RTSPState *rt = s->priv_data; | |
577 | char cmd[1024]; | |
578 | unsigned char *content = NULL; | |
579 | int ret; | |
580 | ||
581 | /* describe the stream */ | |
582 | snprintf(cmd, sizeof(cmd), | |
583 | "Accept: application/sdp\r\n"); | |
584 | if (rt->server_type == RTSP_SERVER_REAL) { | |
585 | /** | |
586 | * The Require: attribute is needed for proper streaming from | |
587 | * Realmedia servers. | |
588 | */ | |
589 | av_strlcat(cmd, | |
590 | "Require: com.real.retain-entity-for-setup\r\n", | |
591 | sizeof(cmd)); | |
592 | } | |
593 | ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content); | |
2ba45a60 DM |
594 | if (reply->status_code != RTSP_STATUS_OK) { |
595 | av_freep(&content); | |
f6fa7814 | 596 | return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA); |
2ba45a60 | 597 | } |
f6fa7814 DM |
598 | if (!content) |
599 | return AVERROR_INVALIDDATA; | |
2ba45a60 DM |
600 | |
601 | av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", content); | |
602 | /* now we got the SDP description, we parse it */ | |
603 | ret = ff_sdp_parse(s, (const char *)content); | |
604 | av_freep(&content); | |
605 | if (ret < 0) | |
606 | return ret; | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | static int rtsp_listen(AVFormatContext *s) | |
612 | { | |
613 | RTSPState *rt = s->priv_data; | |
f6fa7814 | 614 | char proto[128], host[128], path[512], auth[128]; |
2ba45a60 DM |
615 | char uri[500]; |
616 | int port; | |
f6fa7814 | 617 | int default_port = RTSP_DEFAULT_PORT; |
2ba45a60 | 618 | char tcpname[500]; |
f6fa7814 | 619 | const char *lower_proto = "tcp"; |
2ba45a60 DM |
620 | unsigned char rbuf[4096]; |
621 | unsigned char method[10]; | |
622 | int rbuflen = 0; | |
623 | int ret; | |
624 | enum RTSPMethod methodcode; | |
625 | ||
626 | /* extract hostname and port */ | |
f6fa7814 DM |
627 | av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host), |
628 | &port, path, sizeof(path), s->filename); | |
2ba45a60 DM |
629 | |
630 | /* ff_url_join. No authorization by now (NULL) */ | |
f6fa7814 | 631 | ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host, |
2ba45a60 DM |
632 | port, "%s", path); |
633 | ||
f6fa7814 DM |
634 | if (!strcmp(proto, "rtsps")) { |
635 | lower_proto = "tls"; | |
636 | default_port = RTSPS_DEFAULT_PORT; | |
637 | } | |
638 | ||
2ba45a60 | 639 | if (port < 0) |
f6fa7814 | 640 | port = default_port; |
2ba45a60 DM |
641 | |
642 | /* Create TCP connection */ | |
f6fa7814 | 643 | ff_url_join(tcpname, sizeof(tcpname), lower_proto, NULL, host, port, |
2ba45a60 DM |
644 | "?listen&listen_timeout=%d", rt->initial_timeout * 1000); |
645 | ||
646 | if (ret = ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE, | |
647 | &s->interrupt_callback, NULL)) { | |
648 | av_log(s, AV_LOG_ERROR, "Unable to open RTSP for listening\n"); | |
649 | return ret; | |
650 | } | |
651 | rt->state = RTSP_STATE_IDLE; | |
652 | rt->rtsp_hd_out = rt->rtsp_hd; | |
653 | for (;;) { /* Wait for incoming RTSP messages */ | |
654 | ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); | |
655 | if (ret < 0) | |
656 | return ret; | |
657 | ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method, | |
658 | sizeof(method), &methodcode); | |
659 | if (ret) { | |
660 | av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n"); | |
661 | return ret; | |
662 | } | |
663 | ||
664 | if (methodcode == ANNOUNCE) { | |
665 | ret = rtsp_read_announce(s); | |
666 | rt->state = RTSP_STATE_PAUSED; | |
667 | } else if (methodcode == OPTIONS) { | |
668 | ret = rtsp_read_options(s); | |
669 | } else if (methodcode == RECORD) { | |
670 | ret = rtsp_read_record(s); | |
671 | if (!ret) | |
672 | return 0; // We are ready for streaming | |
673 | } else if (methodcode == SETUP) | |
674 | ret = rtsp_read_setup(s, host, uri); | |
675 | if (ret) { | |
676 | ffurl_close(rt->rtsp_hd); | |
677 | return AVERROR_INVALIDDATA; | |
678 | } | |
679 | } | |
680 | return 0; | |
681 | } | |
682 | ||
683 | static int rtsp_probe(AVProbeData *p) | |
684 | { | |
f6fa7814 DM |
685 | if ( |
686 | #if CONFIG_TLS_PROTOCOL | |
687 | av_strstart(p->filename, "rtsps:", NULL) || | |
688 | #endif | |
689 | av_strstart(p->filename, "rtsp:", NULL)) | |
2ba45a60 DM |
690 | return AVPROBE_SCORE_MAX; |
691 | return 0; | |
692 | } | |
693 | ||
694 | static int rtsp_read_header(AVFormatContext *s) | |
695 | { | |
696 | RTSPState *rt = s->priv_data; | |
697 | int ret; | |
698 | ||
699 | if (rt->initial_timeout > 0) | |
700 | rt->rtsp_flags |= RTSP_FLAG_LISTEN; | |
701 | ||
702 | if (rt->rtsp_flags & RTSP_FLAG_LISTEN) { | |
703 | ret = rtsp_listen(s); | |
704 | if (ret) | |
705 | return ret; | |
706 | } else { | |
707 | ret = ff_rtsp_connect(s); | |
708 | if (ret) | |
709 | return ret; | |
710 | ||
711 | rt->real_setup_cache = !s->nb_streams ? NULL : | |
712 | av_mallocz_array(s->nb_streams, 2 * sizeof(*rt->real_setup_cache)); | |
713 | if (!rt->real_setup_cache && s->nb_streams) | |
714 | return AVERROR(ENOMEM); | |
715 | rt->real_setup = rt->real_setup_cache + s->nb_streams; | |
716 | ||
717 | if (rt->initial_pause) { | |
718 | /* do not start immediately */ | |
719 | } else { | |
f6fa7814 | 720 | if ((ret = rtsp_read_play(s)) < 0) { |
2ba45a60 DM |
721 | ff_rtsp_close_streams(s); |
722 | ff_rtsp_close_connections(s); | |
f6fa7814 | 723 | return ret; |
2ba45a60 DM |
724 | } |
725 | } | |
726 | } | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
731 | int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, | |
732 | uint8_t *buf, int buf_size) | |
733 | { | |
734 | RTSPState *rt = s->priv_data; | |
735 | int id, len, i, ret; | |
736 | RTSPStream *rtsp_st; | |
737 | ||
738 | av_dlog(s, "tcp_read_packet:\n"); | |
739 | redo: | |
740 | for (;;) { | |
741 | RTSPMessageHeader reply; | |
742 | ||
743 | ret = ff_rtsp_read_reply(s, &reply, NULL, 1, NULL); | |
744 | if (ret < 0) | |
745 | return ret; | |
746 | if (ret == 1) /* received '$' */ | |
747 | break; | |
748 | /* XXX: parse message */ | |
749 | if (rt->state != RTSP_STATE_STREAMING) | |
750 | return 0; | |
751 | } | |
752 | ret = ffurl_read_complete(rt->rtsp_hd, buf, 3); | |
753 | if (ret != 3) | |
754 | return -1; | |
755 | id = buf[0]; | |
756 | len = AV_RB16(buf + 1); | |
757 | av_dlog(s, "id=%d len=%d\n", id, len); | |
758 | if (len > buf_size || len < 8) | |
759 | goto redo; | |
760 | /* get the data */ | |
761 | ret = ffurl_read_complete(rt->rtsp_hd, buf, len); | |
762 | if (ret != len) | |
763 | return -1; | |
764 | if (rt->transport == RTSP_TRANSPORT_RDT && | |
765 | ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0) | |
766 | return -1; | |
767 | ||
768 | /* find the matching stream */ | |
769 | for (i = 0; i < rt->nb_rtsp_streams; i++) { | |
770 | rtsp_st = rt->rtsp_streams[i]; | |
771 | if (id >= rtsp_st->interleaved_min && | |
772 | id <= rtsp_st->interleaved_max) | |
773 | goto found; | |
774 | } | |
775 | goto redo; | |
776 | found: | |
777 | *prtsp_st = rtsp_st; | |
778 | return len; | |
779 | } | |
780 | ||
781 | static int resetup_tcp(AVFormatContext *s) | |
782 | { | |
783 | RTSPState *rt = s->priv_data; | |
784 | char host[1024]; | |
785 | int port; | |
786 | ||
787 | av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0, | |
788 | s->filename); | |
789 | ff_rtsp_undo_setup(s, 0); | |
790 | return ff_rtsp_make_setup_request(s, host, port, RTSP_LOWER_TRANSPORT_TCP, | |
791 | rt->real_challenge); | |
792 | } | |
793 | ||
794 | static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt) | |
795 | { | |
796 | RTSPState *rt = s->priv_data; | |
797 | int ret; | |
798 | RTSPMessageHeader reply1, *reply = &reply1; | |
799 | char cmd[1024]; | |
800 | ||
801 | retry: | |
802 | if (rt->server_type == RTSP_SERVER_REAL) { | |
803 | int i; | |
804 | ||
805 | for (i = 0; i < s->nb_streams; i++) | |
806 | rt->real_setup[i] = s->streams[i]->discard; | |
807 | ||
808 | if (!rt->need_subscription) { | |
809 | if (memcmp (rt->real_setup, rt->real_setup_cache, | |
810 | sizeof(enum AVDiscard) * s->nb_streams)) { | |
811 | snprintf(cmd, sizeof(cmd), | |
812 | "Unsubscribe: %s\r\n", | |
813 | rt->last_subscription); | |
814 | ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, | |
815 | cmd, reply, NULL); | |
816 | if (reply->status_code != RTSP_STATUS_OK) | |
f6fa7814 | 817 | return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA); |
2ba45a60 DM |
818 | rt->need_subscription = 1; |
819 | } | |
820 | } | |
821 | ||
822 | if (rt->need_subscription) { | |
823 | int r, rule_nr, first = 1; | |
824 | ||
825 | memcpy(rt->real_setup_cache, rt->real_setup, | |
826 | sizeof(enum AVDiscard) * s->nb_streams); | |
827 | rt->last_subscription[0] = 0; | |
828 | ||
829 | snprintf(cmd, sizeof(cmd), | |
830 | "Subscribe: "); | |
831 | for (i = 0; i < rt->nb_rtsp_streams; i++) { | |
832 | rule_nr = 0; | |
833 | for (r = 0; r < s->nb_streams; r++) { | |
834 | if (s->streams[r]->id == i) { | |
835 | if (s->streams[r]->discard != AVDISCARD_ALL) { | |
836 | if (!first) | |
837 | av_strlcat(rt->last_subscription, ",", | |
838 | sizeof(rt->last_subscription)); | |
839 | ff_rdt_subscribe_rule( | |
840 | rt->last_subscription, | |
841 | sizeof(rt->last_subscription), i, rule_nr); | |
842 | first = 0; | |
843 | } | |
844 | rule_nr++; | |
845 | } | |
846 | } | |
847 | } | |
848 | av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription); | |
849 | ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, | |
850 | cmd, reply, NULL); | |
851 | if (reply->status_code != RTSP_STATUS_OK) | |
f6fa7814 | 852 | return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA); |
2ba45a60 DM |
853 | rt->need_subscription = 0; |
854 | ||
855 | if (rt->state == RTSP_STATE_STREAMING) | |
856 | rtsp_read_play (s); | |
857 | } | |
858 | } | |
859 | ||
860 | ret = ff_rtsp_fetch_packet(s, pkt); | |
861 | if (ret < 0) { | |
862 | if (ret == AVERROR(ETIMEDOUT) && !rt->packets) { | |
863 | if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP && | |
864 | rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) { | |
865 | RTSPMessageHeader reply1, *reply = &reply1; | |
866 | av_log(s, AV_LOG_WARNING, "UDP timeout, retrying with TCP\n"); | |
867 | if (rtsp_read_pause(s) != 0) | |
868 | return -1; | |
869 | // TEARDOWN is required on Real-RTSP, but might make | |
870 | // other servers close the connection. | |
871 | if (rt->server_type == RTSP_SERVER_REAL) | |
872 | ff_rtsp_send_cmd(s, "TEARDOWN", rt->control_uri, NULL, | |
873 | reply, NULL); | |
874 | rt->session_id[0] = '\0'; | |
875 | if (resetup_tcp(s) == 0) { | |
876 | rt->state = RTSP_STATE_IDLE; | |
877 | rt->need_subscription = 1; | |
878 | if (rtsp_read_play(s) != 0) | |
879 | return -1; | |
880 | goto retry; | |
881 | } | |
882 | } | |
883 | } | |
884 | return ret; | |
885 | } | |
886 | rt->packets++; | |
887 | ||
888 | if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) { | |
889 | /* send dummy request to keep TCP connection alive */ | |
f6fa7814 | 890 | if ((av_gettime_relative() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2 || |
2ba45a60 DM |
891 | rt->auth_state.stale) { |
892 | if (rt->server_type == RTSP_SERVER_WMS || | |
893 | (rt->server_type != RTSP_SERVER_REAL && | |
894 | rt->get_parameter_supported)) { | |
895 | ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL); | |
896 | } else { | |
897 | ff_rtsp_send_cmd_async(s, "OPTIONS", rt->control_uri, NULL); | |
898 | } | |
899 | /* The stale flag should be reset when creating the auth response in | |
900 | * ff_rtsp_send_cmd_async, but reset it here just in case we never | |
901 | * called the auth code (if we didn't have any credentials set). */ | |
902 | rt->auth_state.stale = 0; | |
903 | } | |
904 | } | |
905 | ||
906 | return 0; | |
907 | } | |
908 | ||
909 | static int rtsp_read_seek(AVFormatContext *s, int stream_index, | |
910 | int64_t timestamp, int flags) | |
911 | { | |
912 | RTSPState *rt = s->priv_data; | |
f6fa7814 | 913 | int ret; |
2ba45a60 DM |
914 | |
915 | rt->seek_timestamp = av_rescale_q(timestamp, | |
916 | s->streams[stream_index]->time_base, | |
917 | AV_TIME_BASE_Q); | |
918 | switch(rt->state) { | |
919 | default: | |
920 | case RTSP_STATE_IDLE: | |
921 | break; | |
922 | case RTSP_STATE_STREAMING: | |
f6fa7814 DM |
923 | if ((ret = rtsp_read_pause(s)) != 0) |
924 | return ret; | |
2ba45a60 | 925 | rt->state = RTSP_STATE_SEEKING; |
f6fa7814 DM |
926 | if ((ret = rtsp_read_play(s)) != 0) |
927 | return ret; | |
2ba45a60 DM |
928 | break; |
929 | case RTSP_STATE_PAUSED: | |
930 | rt->state = RTSP_STATE_IDLE; | |
931 | break; | |
932 | } | |
933 | return 0; | |
934 | } | |
935 | ||
936 | static const AVClass rtsp_demuxer_class = { | |
937 | .class_name = "RTSP demuxer", | |
938 | .item_name = av_default_item_name, | |
939 | .option = ff_rtsp_options, | |
940 | .version = LIBAVUTIL_VERSION_INT, | |
941 | }; | |
942 | ||
943 | AVInputFormat ff_rtsp_demuxer = { | |
944 | .name = "rtsp", | |
945 | .long_name = NULL_IF_CONFIG_SMALL("RTSP input"), | |
946 | .priv_data_size = sizeof(RTSPState), | |
947 | .read_probe = rtsp_probe, | |
948 | .read_header = rtsp_read_header, | |
949 | .read_packet = rtsp_read_packet, | |
950 | .read_close = rtsp_read_close, | |
951 | .read_seek = rtsp_read_seek, | |
952 | .flags = AVFMT_NOFILE, | |
953 | .read_play = rtsp_read_play, | |
954 | .read_pause = rtsp_read_pause, | |
955 | .priv_class = &rtsp_demuxer_class, | |
956 | }; |