FFmpeg coverage

Line	Branch	Exec	Source
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 "config_components.h"
23
24			#include "libavutil/avstring.h"
25			#include "libavutil/intreadwrite.h"
26			#include "libavutil/mathematics.h"
27			#include "libavutil/mem.h"
28			#include "libavutil/random_seed.h"
29			#include "libavutil/time.h"
30			#include "avformat.h"
31			#include "demux.h"
32
33			#include "internal.h"
34			#include "network.h"
35			#include "os_support.h"
36			#include "rtpproto.h"
37			#include "rtsp.h"
38			#include "rdt.h"
39			#include "tls.h"
40			#include "url.h"
41			#include "version.h"
42
43			static const struct RTSPStatusMessage {
44			enum RTSPStatusCode code;
45			const char *message;
46			} status_messages[] = {
47			{ RTSP_STATUS_OK, "OK" },
48			{ RTSP_STATUS_METHOD, "Method Not Allowed" },
49			{ RTSP_STATUS_BANDWIDTH, "Not Enough Bandwidth" },
50			{ RTSP_STATUS_SESSION, "Session Not Found" },
51			{ RTSP_STATUS_STATE, "Method Not Valid in This State" },
52			{ RTSP_STATUS_AGGREGATE, "Aggregate operation not allowed" },
53			{ RTSP_STATUS_ONLY_AGGREGATE, "Only aggregate operation allowed" },
54			{ RTSP_STATUS_TRANSPORT, "Unsupported transport" },
55			{ RTSP_STATUS_INTERNAL, "Internal Server Error" },
56			{ RTSP_STATUS_SERVICE, "Service Unavailable" },
57			{ RTSP_STATUS_VERSION, "RTSP Version not supported" },
58			{ 0, "NULL" }
59			};
60
61		✗	static int rtsp_read_close(AVFormatContext *s)
62			{
63		✗	RTSPState *rt = s->priv_data;
64
65		✗	if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN))
66		✗	ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
67
68		✗	ff_rtsp_close_streams(s);
69		✗	ff_rtsp_close_connections(s);
70		✗	ff_network_close();
71		✗	rt->real_setup = NULL;
72		✗	av_freep(&rt->real_setup_cache);
73		✗	return 0;
74			}
75
76		✗	static inline int read_line(AVFormatContext *s, char *rbuf, const int rbufsize,
77			int *rbuflen)
78			{
79		✗	RTSPState *rt = s->priv_data;
80		✗	int idx = 0;
81		✗	int ret = 0;
82		✗	*rbuflen = 0;
83
84			do {
85		✗	ret = ffurl_read_complete(rt->rtsp_hd, rbuf + idx, 1);
86		✗	if (ret <= 0)
87		✗	return ret ? ret : AVERROR_EOF;
88		✗	if (rbuf[idx] == '\r') {
89			/* Ignore */
90		✗	} else if (rbuf[idx] == '\n') {
91		✗	rbuf[idx] = '\0';
92		✗	*rbuflen = idx;
93		✗	return 0;
94			} else
95		✗	idx++;
96		✗	} while (idx < rbufsize);
97		✗	av_log(s, AV_LOG_ERROR, "Message too long\n");
98		✗	return AVERROR(EIO);
99			}
100
101		✗	static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code,
102			const char *extracontent, uint16_t seq)
103			{
104		✗	RTSPState *rt = s->priv_data;
105			char message[MAX_URL_SIZE];
106		✗	int index = 0;
107		✗	while (status_messages[index].code) {
108		✗	if (status_messages[index].code == code) {
109		✗	snprintf(message, sizeof(message), "RTSP/1.0 %d %s\r\n",
110		✗	code, status_messages[index].message);
111		✗	break;
112			}
113		✗	index++;
114			}
115		✗	if (!status_messages[index].code)
116		✗	return AVERROR(EINVAL);
117		✗	av_strlcatf(message, sizeof(message), "CSeq: %d\r\n", seq);
118		✗	av_strlcatf(message, sizeof(message), "Server: %s\r\n", LIBAVFORMAT_IDENT);
119		✗	if (extracontent)
120		✗	av_strlcat(message, extracontent, sizeof(message));
121		✗	av_strlcat(message, "\r\n", sizeof(message));
122		✗	av_log(s, AV_LOG_TRACE, "Sending response:\n%s", message);
123		✗	ffurl_write(rt->rtsp_hd_out, message, strlen(message));
124
125		✗	return 0;
126			}
127
128		✗	static inline int check_sessionid(AVFormatContext *s,
129			RTSPMessageHeader *request)
130			{
131		✗	RTSPState *rt = s->priv_data;
132		✗	unsigned char *session_id = rt->session_id;
133		✗	if (!session_id[0]) {
134		✗	av_log(s, AV_LOG_WARNING, "There is no session-id at the moment\n");
135		✗	return 0;
136			}
137		✗	if (strcmp(session_id, request->session_id)) {
138		✗	av_log(s, AV_LOG_ERROR, "Unexpected session-id %s\n",
139		✗	request->session_id);
140		✗	rtsp_send_reply(s, RTSP_STATUS_SESSION, NULL, request->seq);
141		✗	return AVERROR_STREAM_NOT_FOUND;
142			}
143		✗	return 0;
144			}
145
146		✗	static inline int rtsp_read_request(AVFormatContext *s,
147			RTSPMessageHeader *request,
148			const char *method)
149			{
150		✗	RTSPState *rt = s->priv_data;
151			char rbuf[MAX_URL_SIZE];
152			int rbuflen, ret;
153			do {
154		✗	ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
155		✗	if (ret)
156		✗	return ret;
157		✗	if (rbuflen > 1) {
158		✗	av_log(s, AV_LOG_TRACE, "Parsing[%d]: %s\n", rbuflen, rbuf);
159		✗	ff_rtsp_parse_line(s, request, rbuf, rt, method);
160			}
161		✗	} while (rbuflen > 0);
162		✗	if (request->seq != rt->seq + 1) {
163		✗	av_log(s, AV_LOG_ERROR, "Unexpected Sequence number %d\n",
164			request->seq);
165		✗	return AVERROR(EINVAL);
166			}
167		✗	if (rt->session_id[0] && strcmp(method, "OPTIONS")) {
168		✗	ret = check_sessionid(s, request);
169		✗	if (ret)
170		✗	return ret;
171			}
172
173		✗	return 0;
174			}
175
176		✗	static int rtsp_read_announce(AVFormatContext *s)
177			{
178		✗	RTSPState *rt = s->priv_data;
179		✗	RTSPMessageHeader request = { 0 };
180			char *sdp;
181			int ret;
182
183		✗	ret = rtsp_read_request(s, &request, "ANNOUNCE");
184		✗	if (ret)
185		✗	return ret;
186		✗	rt->seq++;
187		✗	if (strcmp(request.content_type, "application/sdp")) {
188		✗	av_log(s, AV_LOG_ERROR, "Unexpected content type %s\n",
189			request.content_type);
190		✗	rtsp_send_reply(s, RTSP_STATUS_SERVICE, NULL, request.seq);
191		✗	return AVERROR_OPTION_NOT_FOUND;
192			}
193		✗	if (request.content_length) {
194		✗	sdp = av_malloc(request.content_length + 1);
195		✗	if (!sdp)
196		✗	return AVERROR(ENOMEM);
197
198			/* Read SDP */
199		✗	if (ffurl_read_complete(rt->rtsp_hd, sdp, request.content_length)
200		✗	< request.content_length) {
201		✗	av_log(s, AV_LOG_ERROR,
202			"Unable to get complete SDP Description in ANNOUNCE\n");
203		✗	rtsp_send_reply(s, RTSP_STATUS_INTERNAL, NULL, request.seq);
204		✗	av_free(sdp);
205		✗	return AVERROR(EIO);
206			}
207		✗	sdp[request.content_length] = '\0';
208		✗	av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp);
209		✗	ret = ff_sdp_parse(s, sdp);
210		✗	av_free(sdp);
211		✗	if (ret)
212		✗	return ret;
213		✗	rtsp_send_reply(s, RTSP_STATUS_OK, NULL, request.seq);
214		✗	return 0;
215			}
216		✗	av_log(s, AV_LOG_ERROR,
217			"Content-Length header value exceeds sdp allocated buffer (4KB)\n");
218		✗	rtsp_send_reply(s, RTSP_STATUS_INTERNAL,
219		✗	"Content-Length exceeds buffer size", request.seq);
220		✗	return AVERROR(EIO);
221			}
222
223		✗	static int rtsp_read_options(AVFormatContext *s)
224			{
225		✗	RTSPState *rt = s->priv_data;
226		✗	RTSPMessageHeader request = { 0 };
227		✗	int ret = 0;
228
229			/* Parsing headers */
230		✗	ret = rtsp_read_request(s, &request, "OPTIONS");
231		✗	if (ret)
232		✗	return ret;
233		✗	rt->seq++;
234			/* Send Reply */
235		✗	rtsp_send_reply(s, RTSP_STATUS_OK,
236			"Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD\r\n",
237		✗	request.seq);
238		✗	return 0;
239			}
240
241		✗	static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl)
242			{
243		✗	RTSPState *rt = s->priv_data;
244		✗	RTSPMessageHeader request = { 0 };
245		✗	int ret = 0;
246			char url[MAX_URL_SIZE];
247			RTSPStream *rtsp_st;
248			char responseheaders[MAX_URL_SIZE];
249		✗	int localport = -1;
250		✗	int transportidx = 0;
251		✗	int streamid = 0;
252
253		✗	ret = rtsp_read_request(s, &request, "SETUP");
254		✗	if (ret)
255		✗	return ret;
256		✗	rt->seq++;
257		✗	if (!request.nb_transports) {
258		✗	av_log(s, AV_LOG_ERROR, "No transport defined in SETUP\n");
259		✗	return AVERROR_INVALIDDATA;
260			}
261		✗	for (transportidx = 0; transportidx < request.nb_transports;
262		✗	transportidx++) {
263		✗	if (!request.transports[transportidx].mode_record ||
264		✗	(request.transports[transportidx].lower_transport !=
265		✗	RTSP_LOWER_TRANSPORT_UDP &&
266		✗	request.transports[transportidx].lower_transport !=
267			RTSP_LOWER_TRANSPORT_TCP)) {
268		✗	av_log(s, AV_LOG_ERROR, "mode=record/receive not set or transport"
269			" protocol not supported (yet)\n");
270		✗	return AVERROR_INVALIDDATA;
271			}
272			}
273		✗	if (request.nb_transports > 1)
274		✗	av_log(s, AV_LOG_WARNING, "More than one transport not supported, "
275			"using first of all\n");
276		✗	for (streamid = 0; streamid < rt->nb_rtsp_streams; streamid++) {
277		✗	if (!strcmp(rt->rtsp_streams[streamid]->control_url,
278			controlurl))
279		✗	break;
280			}
281		✗	if (streamid == rt->nb_rtsp_streams) {
282		✗	av_log(s, AV_LOG_ERROR, "Unable to find requested track\n");
283		✗	return AVERROR_STREAM_NOT_FOUND;
284			}
285		✗	rtsp_st = rt->rtsp_streams[streamid];
286		✗	localport = rt->rtp_port_min;
287
288			/* check if the stream has already been setup */
289		✗	if (rtsp_st->transport_priv) {
290		✗	if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
291		✗	ff_rdt_parse_close(rtsp_st->transport_priv);
292		✗	else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
293		✗	ff_rtp_parse_close(rtsp_st->transport_priv);
294		✗	rtsp_st->transport_priv = NULL;
295			}
296		✗	if (rtsp_st->rtp_handle)
297		✗	ffurl_closep(&rtsp_st->rtp_handle);
298
299		✗	if (request.transports[0].lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
300		✗	rt->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
301		✗	if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) {
302		✗	rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
303		✗	return ret;
304			}
305		✗	rtsp_st->interleaved_min = request.transports[0].interleaved_min;
306		✗	rtsp_st->interleaved_max = request.transports[0].interleaved_max;
307		✗	snprintf(responseheaders, sizeof(responseheaders), "Transport: "
308			"RTP/AVP/TCP;unicast;mode=record;interleaved=%d-%d"
309			"\r\n", request.transports[0].interleaved_min,
310			request.transports[0].interleaved_max);
311			} else {
312			do {
313		✗	AVDictionary *opts = NULL;
314		✗	av_dict_set_int(&opts, "buffer_size", rt->buffer_size, 0);
315		✗	ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL);
316		✗	av_log(s, AV_LOG_TRACE, "Opening: %s\n", url);
317		✗	ret = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
318		✗	&s->interrupt_callback, &opts,
319		✗	s->protocol_whitelist, s->protocol_blacklist, NULL);
320		✗	av_dict_free(&opts);
321		✗	if (ret)
322		✗	localport += 2;
323		✗	} while (ret || localport > rt->rtp_port_max);
324		✗	if (localport > rt->rtp_port_max) {
325		✗	rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
326		✗	return ret;
327			}
328
329		✗	av_log(s, AV_LOG_TRACE, "Listening on: %d\n",
330			ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle));
331		✗	if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) {
332		✗	rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
333		✗	return ret;
334			}
335
336		✗	localport = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
337		✗	snprintf(responseheaders, sizeof(responseheaders), "Transport: "
338			"RTP/AVP/UDP;unicast;mode=record;source=%s;"
339			"client_port=%d-%d;server_port=%d-%d\r\n",
340			host, request.transports[0].client_port_min,
341			request.transports[0].client_port_max, localport,
342			localport + 1);
343			}
344
345			/* Establish sessionid if not previously set */
346			/* Put this in a function? */
347			/* RFC 2326: session id must be at least 8 digits */
348		✗	while (strlen(rt->session_id) < 8)
349		✗	av_strlcatf(rt->session_id, 512, "%u", av_get_random_seed());
350
351		✗	av_strlcatf(responseheaders, sizeof(responseheaders), "Session: %s\r\n",
352		✗	rt->session_id);
353			/* Send Reply */
354		✗	rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq);
355
356		✗	rt->state = RTSP_STATE_PAUSED;
357		✗	return 0;
358			}
359
360		✗	static int rtsp_read_record(AVFormatContext *s)
361			{
362		✗	RTSPState *rt = s->priv_data;
363		✗	RTSPMessageHeader request = { 0 };
364		✗	int ret = 0;
365			char responseheaders[MAX_URL_SIZE];
366
367		✗	ret = rtsp_read_request(s, &request, "RECORD");
368		✗	if (ret)
369		✗	return ret;
370		✗	ret = check_sessionid(s, &request);
371		✗	if (ret)
372		✗	return ret;
373		✗	rt->seq++;
374		✗	snprintf(responseheaders, sizeof(responseheaders), "Session: %s\r\n",
375		✗	rt->session_id);
376		✗	rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq);
377
378		✗	rt->state = RTSP_STATE_STREAMING;
379		✗	return 0;
380			}
381
382		✗	static inline int parse_command_line(AVFormatContext *s, const char *line,
383			int linelen, char *uri, int urisize,
384			char *method, int methodsize,
385			enum RTSPMethod *methodcode)
386			{
387		✗	RTSPState *rt = s->priv_data;
388			const char *linept, *searchlinept;
389		✗	linept = strchr(line, ' ');
390
391		✗	if (!linept) {
392		✗	av_log(s, AV_LOG_ERROR, "Error parsing method string\n");
393		✗	return AVERROR_INVALIDDATA;
394			}
395
396		✗	if (linept - line > methodsize - 1) {
397		✗	av_log(s, AV_LOG_ERROR, "Method string too long\n");
398		✗	return AVERROR(EIO);
399			}
400		✗	memcpy(method, line, linept - line);
401		✗	method[linept - line] = '\0';
402		✗	linept++;
403		✗	if (!strcmp(method, "ANNOUNCE"))
404		✗	*methodcode = ANNOUNCE;
405		✗	else if (!strcmp(method, "OPTIONS"))
406		✗	*methodcode = OPTIONS;
407		✗	else if (!strcmp(method, "RECORD"))
408		✗	*methodcode = RECORD;
409		✗	else if (!strcmp(method, "SETUP"))
410		✗	*methodcode = SETUP;
411		✗	else if (!strcmp(method, "PAUSE"))
412		✗	*methodcode = PAUSE;
413		✗	else if (!strcmp(method, "TEARDOWN"))
414		✗	*methodcode = TEARDOWN;
415			else
416		✗	*methodcode = UNKNOWN;
417			/* Check method with the state */
418		✗	if (rt->state == RTSP_STATE_IDLE) {
419		✗	if ((*methodcode != ANNOUNCE) && (*methodcode != OPTIONS)) {
420		✗	av_log(s, AV_LOG_ERROR, "Unexpected command in Idle State %s\n",
421			line);
422		✗	return AVERROR_PROTOCOL_NOT_FOUND;
423			}
424		✗	} else if (rt->state == RTSP_STATE_PAUSED) {
425		✗	if ((*methodcode != OPTIONS) && (*methodcode != RECORD)
426		✗	&& (*methodcode != SETUP)) {
427		✗	av_log(s, AV_LOG_ERROR, "Unexpected command in Paused State %s\n",
428			line);
429		✗	return AVERROR_PROTOCOL_NOT_FOUND;
430			}
431		✗	} else if (rt->state == RTSP_STATE_STREAMING) {
432		✗	if ((*methodcode != PAUSE) && (*methodcode != OPTIONS)
433		✗	&& (*methodcode != TEARDOWN)) {
434		✗	av_log(s, AV_LOG_ERROR, "Unexpected command in Streaming State"
435			" %s\n", line);
436		✗	return AVERROR_PROTOCOL_NOT_FOUND;
437			}
438			} else {
439		✗	av_log(s, AV_LOG_ERROR, "Unexpected State [%d]\n", rt->state);
440		✗	return AVERROR_BUG;
441			}
442
443		✗	searchlinept = strchr(linept, ' ');
444		✗	if (!searchlinept) {
445		✗	av_log(s, AV_LOG_ERROR, "Error parsing message URI\n");
446		✗	return AVERROR_INVALIDDATA;
447			}
448		✗	if (searchlinept - linept > urisize - 1) {
449		✗	av_log(s, AV_LOG_ERROR, "uri string length exceeded buffer size\n");
450		✗	return AVERROR(EIO);
451			}
452		✗	memcpy(uri, linept, searchlinept - linept);
453		✗	uri[searchlinept - linept] = '\0';
454		✗	if (strcmp(rt->control_uri, uri)) {
455			char host[128], path[512], auth[128];
456			int port;
457			char ctl_host[128], ctl_path[512], ctl_auth[128];
458			int ctl_port;
459		✗	av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port,
460			path, sizeof(path), uri);
461		✗	av_url_split(NULL, 0, ctl_auth, sizeof(ctl_auth), ctl_host,
462			sizeof(ctl_host), &ctl_port, ctl_path, sizeof(ctl_path),
463		✗	rt->control_uri);
464		✗	if (strcmp(host, ctl_host))
465		✗	av_log(s, AV_LOG_INFO, "Host %s differs from expected %s\n",
466			host, ctl_host);
467		✗	if (strcmp(path, ctl_path) && *methodcode != SETUP)
468		✗	av_log(s, AV_LOG_WARNING, "WARNING: Path %s differs from expected"
469			" %s\n", path, ctl_path);
470		✗	if (*methodcode == ANNOUNCE) {
471		✗	av_log(s, AV_LOG_INFO,
472			"Updating control URI to %s\n", uri);
473		✗	av_strlcpy(rt->control_uri, uri, sizeof(rt->control_uri));
474			}
475			}
476
477		✗	linept = searchlinept + 1;
478		✗	if (!av_strstart(linept, "RTSP/1.0", NULL)) {
479		✗	av_log(s, AV_LOG_ERROR, "Error parsing protocol or version\n");
480		✗	return AVERROR_PROTOCOL_NOT_FOUND;
481			}
482		✗	return 0;
483			}
484
485		✗	int ff_rtsp_parse_streaming_commands(AVFormatContext *s)
486			{
487		✗	RTSPState *rt = s->priv_data;
488			unsigned char rbuf[MAX_URL_SIZE];
489			unsigned char method[10];
490			char uri[500];
491			int ret;
492		✗	int rbuflen = 0;
493		✗	RTSPMessageHeader request = { 0 };
494			enum RTSPMethod methodcode;
495
496		✗	ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
497		✗	if (ret < 0)
498		✗	return ret;
499		✗	av_log(s, AV_LOG_TRACE, "Parsing[%d]: %s\n", rbuflen, rbuf);
500		✗	ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method,
501			sizeof(method), &methodcode);
502		✗	if (ret) {
503		✗	av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n");
504		✗	return ret;
505			}
506
507		✗	ret = rtsp_read_request(s, &request, method);
508		✗	if (ret)
509		✗	return ret;
510		✗	rt->seq++;
511		✗	if (methodcode == PAUSE) {
512		✗	rt->state = RTSP_STATE_PAUSED;
513		✗	ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq);
514			// TODO: Missing date header in response
515		✗	} else if (methodcode == OPTIONS) {
516		✗	ret = rtsp_send_reply(s, RTSP_STATUS_OK,
517			"Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, "
518		✗	"RECORD\r\n", request.seq);
519		✗	} else if (methodcode == TEARDOWN) {
520		✗	rt->state = RTSP_STATE_IDLE;
521		✗	ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq);
522			}
523		✗	return ret;
524			}
525
526		✗	static int rtsp_read_play(AVFormatContext *s)
527			{
528		✗	RTSPState *rt = s->priv_data;
529		✗	RTSPMessageHeader reply1, *reply = &reply1;
530			int i;
531			char cmd[MAX_URL_SIZE];
532
533		✗	av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
534		✗	rt->nb_byes = 0;
535
536		✗	if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
537		✗	for (i = 0; i < rt->nb_rtsp_streams; i++) {
538		✗	RTSPStream *rtsp_st = rt->rtsp_streams[i];
539			/* Try to initialize the connection state in a
540			* potential NAT router by sending dummy packets.
541			* RTP/RTCP dummy packets are used for RDT, too.
542			*/
543		✗	if (rtsp_st->rtp_handle &&
544		✗	!(rt->server_type == RTSP_SERVER_WMS && i > 1))
545		✗	ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
546			}
547			}
548		✗	if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
549		✗	if (rt->transport == RTSP_TRANSPORT_RTP) {
550		✗	for (i = 0; i < rt->nb_rtsp_streams; i++) {
551		✗	RTSPStream *rtsp_st = rt->rtsp_streams[i];
552		✗	RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
553		✗	if (!rtpctx)
554		✗	continue;
555		✗	ff_rtp_reset_packet_queue(rtpctx);
556		✗	rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE;
557		✗	rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE;
558		✗	rtpctx->base_timestamp = 0;
559		✗	rtpctx->timestamp = 0;
560		✗	rtpctx->unwrapped_timestamp = 0;
561		✗	rtpctx->rtcp_ts_offset = 0;
562			}
563			}
564		✗	if (rt->state == RTSP_STATE_PAUSED) {
565		✗	cmd[0] = 0;
566			} else {
567		✗	snprintf(cmd, sizeof(cmd),
568			"Range: npt=%"PRId64".%03"PRId64"-\r\n",
569		✗	rt->seek_timestamp / AV_TIME_BASE,
570		✗	rt->seek_timestamp / (AV_TIME_BASE / 1000) % 1000);
571			}
572		✗	ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL);
573		✗	if (reply->status_code != RTSP_STATUS_OK) {
574		✗	return ff_rtsp_averror(reply->status_code, -1);
575			}
576		✗	if (rt->transport == RTSP_TRANSPORT_RTP &&
577		✗	reply->range_start != AV_NOPTS_VALUE) {
578		✗	for (i = 0; i < rt->nb_rtsp_streams; i++) {
579		✗	RTSPStream *rtsp_st = rt->rtsp_streams[i];
580		✗	RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
581		✗	AVStream *st = NULL;
582		✗	if (!rtpctx || rtsp_st->stream_index < 0)
583		✗	continue;
584
585		✗	st = s->streams[rtsp_st->stream_index];
586		✗	rtpctx->range_start_offset =
587		✗	av_rescale_q(reply->range_start, AV_TIME_BASE_Q,
588			st->time_base);
589			}
590			}
591			}
592		✗	rt->state = RTSP_STATE_STREAMING;
593		✗	return 0;
594			}
595
596			/* pause the stream */
597		✗	static int rtsp_read_pause(AVFormatContext *s)
598			{
599		✗	RTSPState *rt = s->priv_data;
600		✗	RTSPMessageHeader reply1, *reply = &reply1;
601
602		✗	if (rt->state != RTSP_STATE_STREAMING)
603		✗	return 0;
604		✗	else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
605		✗	ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL);
606		✗	if (reply->status_code != RTSP_STATUS_OK) {
607		✗	return ff_rtsp_averror(reply->status_code, -1);
608			}
609			}
610		✗	rt->state = RTSP_STATE_PAUSED;
611		✗	return 0;
612			}
613
614		✗	int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
615			{
616		✗	RTSPState *rt = s->priv_data;
617			char cmd[MAX_URL_SIZE];
618		✗	unsigned char *content = NULL;
619			int ret;
620
621			/* describe the stream */
622		✗	snprintf(cmd, sizeof(cmd),
623			"Accept: application/sdp\r\n");
624		✗	if (rt->server_type == RTSP_SERVER_REAL) {
625			/**
626			* The Require: attribute is needed for proper streaming from
627			* Realmedia servers.
628			*/
629		✗	av_strlcat(cmd,
630			"Require: com.real.retain-entity-for-setup\r\n",
631			sizeof(cmd));
632			}
633		✗	ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content);
634		✗	if (reply->status_code != RTSP_STATUS_OK) {
635		✗	av_freep(&content);
636		✗	return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
637			}
638		✗	if (!content)
639		✗	return AVERROR_INVALIDDATA;
640
641		✗	av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", content);
642			/* now we got the SDP description, we parse it */
643		✗	ret = ff_sdp_parse(s, (const char *)content);
644		✗	av_freep(&content);
645		✗	if (ret < 0)
646		✗	return ret;
647
648		✗	return 0;
649			}
650
651		✗	static int rtsp_listen(AVFormatContext *s)
652			{
653		✗	RTSPState *rt = s->priv_data;
654			char proto[128], host[128], path[512], auth[128];
655			char uri[500];
656			int port;
657		✗	int default_port = RTSP_DEFAULT_PORT;
658			char tcpname[500];
659		✗	const char *lower_proto = "tcp";
660			unsigned char rbuf[MAX_URL_SIZE];
661			unsigned char method[10];
662		✗	int rbuflen = 0;
663			int ret;
664			enum RTSPMethod methodcode;
665
666		✗	if (!ff_network_init())
667		✗	return AVERROR(EIO);
668
669			/* extract hostname and port */
670		✗	av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host),
671		✗	&port, path, sizeof(path), s->url);
672
673			/* ff_url_join. No authorization by now (NULL) */
674		✗	ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host,
675			port, "%s", path);
676
677		✗	if (!strcmp(proto, "rtsps")) {
678		✗	lower_proto = "tls";
679		✗	default_port = RTSPS_DEFAULT_PORT;
680			}
681
682		✗	if (port < 0)
683		✗	port = default_port;
684
685			/* Create TCP connection */
686		✗	ff_url_join(tcpname, sizeof(tcpname), lower_proto, NULL, host, port,
687		✗	"?listen&listen_timeout=%d", rt->initial_timeout * 1000);
688
689		✗	if (ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
690		✗	&s->interrupt_callback, NULL,
691		✗	s->protocol_whitelist, s->protocol_blacklist, NULL)) {
692		✗	av_log(s, AV_LOG_ERROR, "Unable to open RTSP for listening\n");
693		✗	goto fail;
694			}
695		✗	rt->state = RTSP_STATE_IDLE;
696		✗	rt->rtsp_hd_out = rt->rtsp_hd;
697			for (;;) { /* Wait for incoming RTSP messages */
698		✗	ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
699		✗	if (ret < 0)
700		✗	goto fail;
701		✗	av_log(s, AV_LOG_TRACE, "Parsing[%d]: %s\n", rbuflen, rbuf);
702		✗	ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method,
703			sizeof(method), &methodcode);
704		✗	if (ret) {
705		✗	av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n");
706		✗	goto fail;
707			}
708
709		✗	if (methodcode == ANNOUNCE) {
710		✗	ret = rtsp_read_announce(s);
711		✗	rt->state = RTSP_STATE_PAUSED;
712		✗	} else if (methodcode == OPTIONS) {
713		✗	ret = rtsp_read_options(s);
714		✗	} else if (methodcode == RECORD) {
715		✗	ret = rtsp_read_record(s);
716		✗	if (!ret)
717		✗	return 0; // We are ready for streaming
718		✗	} else if (methodcode == SETUP)
719		✗	ret = rtsp_read_setup(s, host, uri);
720		✗	if (ret) {
721		✗	ret = AVERROR_INVALIDDATA;
722		✗	goto fail;
723			}
724			}
725		✗	fail:
726		✗	ff_rtsp_close_streams(s);
727		✗	ff_rtsp_close_connections(s);
728		✗	ff_network_close();
729		✗	return ret;
730			}
731
732		3843	static int rtsp_probe(const AVProbeData *p)
733			{
734	1/2 ✓ Branch 0 taken 3843 times. ✗ Branch 1 not taken.	3843	if (
735			#if CONFIG_TLS_PROTOCOL
736			av_strstart(p->filename, "rtsps:", NULL) ||
737			#endif
738	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 3843 times.	7686	av_strstart(p->filename, "satip:", NULL) ||
739		3843	av_strstart(p->filename, "rtsp:", NULL))
740		✗	return AVPROBE_SCORE_MAX;
741		3843	return 0;
742			}
743
744		✗	static int rtsp_read_header(AVFormatContext *s)
745			{
746		✗	RTSPState *rt = s->priv_data;
747			int ret;
748
749		✗	if (rt->initial_timeout > 0)
750		✗	rt->rtsp_flags |= RTSP_FLAG_LISTEN;
751
752		✗	if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
753		✗	ret = rtsp_listen(s);
754		✗	if (ret)
755		✗	return ret;
756			} else {
757		✗	ret = ff_rtsp_connect(s);
758		✗	if (ret)
759		✗	return ret;
760
761		✗	rt->real_setup_cache = !s->nb_streams ? NULL :
762		✗	av_calloc(s->nb_streams, 2 * sizeof(*rt->real_setup_cache));
763		✗	if (!rt->real_setup_cache && s->nb_streams) {
764		✗	ret = AVERROR(ENOMEM);
765		✗	goto fail;
766			}
767		✗	rt->real_setup = rt->real_setup_cache + s->nb_streams;
768
769		✗	if (rt->initial_pause) {
770			/* do not start immediately */
771			} else {
772		✗	ret = rtsp_read_play(s);
773		✗	if (ret < 0)
774		✗	goto fail;
775			}
776			}
777
778		✗	return 0;
779
780		✗	fail:
781		✗	rtsp_read_close(s);
782		✗	return ret;
783			}
784
785		✗	int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
786			uint8_t *buf, int buf_size)
787			{
788		✗	RTSPState *rt = s->priv_data;
789			int id, len, i, ret;
790			RTSPStream *rtsp_st;
791
792		✗	av_log(s, AV_LOG_TRACE, "tcp_read_packet:\n");
793		✗	redo:
794		✗	for (;;) {
795			RTSPMessageHeader reply;
796
797		✗	ret = ff_rtsp_read_reply(s, &reply, NULL, 1, NULL);
798		✗	if (ret < 0)
799		✗	return ret;
800		✗	if (ret == 1) /* received '$' */
801		✗	break;
802			/* XXX: parse message */
803		✗	if (rt->state != RTSP_STATE_STREAMING)
804		✗	return 0;
805			}
806		✗	ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
807		✗	if (ret != 3)
808		✗	return AVERROR(EIO);
809		✗	id = buf[0];
810		✗	len = AV_RB16(buf + 1);
811		✗	av_log(s, AV_LOG_TRACE, "id=%d len=%d\n", id, len);
812		✗	if (len > buf_size || len < 8)
813		✗	goto redo;
814			/* get the data */
815		✗	ret = ffurl_read_complete(rt->rtsp_hd, buf, len);
816		✗	if (ret != len)
817		✗	return AVERROR(EIO);
818		✗	if (rt->transport == RTSP_TRANSPORT_RDT &&
819		✗	(ret = ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL)) < 0)
820		✗	return ret;
821
822			/* find the matching stream */
823		✗	for (i = 0; i < rt->nb_rtsp_streams; i++) {
824		✗	rtsp_st = rt->rtsp_streams[i];
825		✗	if (id >= rtsp_st->interleaved_min &&
826		✗	id <= rtsp_st->interleaved_max)
827		✗	goto found;
828			}
829		✗	goto redo;
830		✗	found:
831		✗	*prtsp_st = rtsp_st;
832		✗	return len;
833			}
834
835		✗	static int resetup_tcp(AVFormatContext *s)
836			{
837		✗	RTSPState *rt = s->priv_data;
838			char host[1024];
839			int port;
840
841		✗	av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0,
842		✗	s->url);
843		✗	ff_rtsp_undo_setup(s, 0);
844		✗	return ff_rtsp_make_setup_request(s, host, port, RTSP_LOWER_TRANSPORT_TCP,
845		✗	rt->real_challenge);
846			}
847
848		✗	static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
849			{
850		✗	RTSPState *rt = s->priv_data;
851			int ret;
852		✗	RTSPMessageHeader reply1, *reply = &reply1;
853			char cmd[MAX_URL_SIZE];
854
855		✗	retry:
856		✗	if (rt->server_type == RTSP_SERVER_REAL) {
857			int i;
858
859		✗	for (i = 0; i < s->nb_streams; i++)
860		✗	rt->real_setup[i] = s->streams[i]->discard;
861
862		✗	if (!rt->need_subscription) {
863		✗	if (memcmp (rt->real_setup, rt->real_setup_cache,
864		✗	sizeof(enum AVDiscard) * s->nb_streams)) {
865		✗	snprintf(cmd, sizeof(cmd),
866			"Unsubscribe: %s\r\n",
867		✗	rt->last_subscription);
868		✗	ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
869			cmd, reply, NULL);
870		✗	if (reply->status_code != RTSP_STATUS_OK)
871		✗	return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
872		✗	rt->need_subscription = 1;
873			}
874			}
875
876		✗	if (rt->need_subscription) {
877		✗	int r, rule_nr, first = 1;
878
879		✗	memcpy(rt->real_setup_cache, rt->real_setup,
880		✗	sizeof(enum AVDiscard) * s->nb_streams);
881		✗	rt->last_subscription[0] = 0;
882
883		✗	snprintf(cmd, sizeof(cmd),
884			"Subscribe: ");
885		✗	for (i = 0; i < rt->nb_rtsp_streams; i++) {
886		✗	rule_nr = 0;
887		✗	for (r = 0; r < s->nb_streams; r++) {
888		✗	if (s->streams[r]->id == i) {
889		✗	if (s->streams[r]->discard != AVDISCARD_ALL) {
890		✗	if (!first)
891		✗	av_strlcat(rt->last_subscription, ",",
892			sizeof(rt->last_subscription));
893		✗	ff_rdt_subscribe_rule(
894		✗	rt->last_subscription,
895			sizeof(rt->last_subscription), i, rule_nr);
896		✗	first = 0;
897			}
898		✗	rule_nr++;
899			}
900			}
901			}
902		✗	av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
903		✗	ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
904			cmd, reply, NULL);
905		✗	if (reply->status_code != RTSP_STATUS_OK)
906		✗	return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
907		✗	rt->need_subscription = 0;
908
909		✗	if (rt->state == RTSP_STATE_STREAMING)
910		✗	rtsp_read_play (s);
911			}
912			}
913
914		✗	ret = ff_rtsp_fetch_packet(s, pkt);
915		✗	if (ret < 0) {
916		✗	if (ret == AVERROR(ETIMEDOUT) && !rt->packets) {
917		✗	if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
918		✗	rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) {
919		✗	RTSPMessageHeader reply1, *reply = &reply1;
920		✗	av_log(s, AV_LOG_WARNING, "UDP timeout, retrying with TCP\n");
921		✗	if (rtsp_read_pause(s) != 0)
922		✗	return -1;
923			// TEARDOWN is required on Real-RTSP, but might make
924			// other servers close the connection.
925		✗	if (rt->server_type == RTSP_SERVER_REAL)
926		✗	ff_rtsp_send_cmd(s, "TEARDOWN", rt->control_uri, NULL,
927			reply, NULL);
928		✗	rt->session_id[0] = '\0';
929		✗	if (resetup_tcp(s) == 0) {
930		✗	rt->state = RTSP_STATE_IDLE;
931		✗	rt->need_subscription = 1;
932		✗	if (rtsp_read_play(s) != 0)
933		✗	return -1;
934		✗	goto retry;
935			}
936			}
937			}
938		✗	return ret;
939			}
940		✗	rt->packets++;
941
942		✗	if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) {
943			/* send dummy request to keep TCP connection alive */
944		✗	if ((av_gettime_relative() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2 ||
945		✗	rt->auth_state.stale) {
946		✗	if (rt->server_type == RTSP_SERVER_WMS ||
947		✗	(rt->server_type != RTSP_SERVER_REAL &&
948		✗	rt->get_parameter_supported)) {
949		✗	ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
950			} else {
951		✗	ff_rtsp_send_cmd_async(s, "OPTIONS", rt->control_uri, NULL);
952			}
953			/* The stale flag should be reset when creating the auth response in
954			* ff_rtsp_send_cmd_async, but reset it here just in case we never
955			* called the auth code (if we didn't have any credentials set). */
956		✗	rt->auth_state.stale = 0;
957			}
958			}
959
960		✗	return 0;
961			}
962
963		✗	static int rtsp_read_seek(AVFormatContext *s, int stream_index,
964			int64_t timestamp, int flags)
965			{
966		✗	RTSPState *rt = s->priv_data;
967			int ret;
968
969		✗	rt->seek_timestamp = av_rescale_q(timestamp,
970		✗	s->streams[stream_index]->time_base,
971		✗	AV_TIME_BASE_Q);
972		✗	switch(rt->state) {
973		✗	default:
974			case RTSP_STATE_IDLE:
975		✗	break;
976		✗	case RTSP_STATE_STREAMING:
977		✗	if ((ret = rtsp_read_pause(s)) != 0)
978		✗	return ret;
979		✗	rt->state = RTSP_STATE_SEEKING;
980		✗	if ((ret = rtsp_read_play(s)) != 0)
981		✗	return ret;
982		✗	break;
983		✗	case RTSP_STATE_PAUSED:
984		✗	rt->state = RTSP_STATE_IDLE;
985		✗	break;
986			}
987		✗	return 0;
988			}
989
990			static const AVClass rtsp_demuxer_class = {
991			.class_name = "RTSP demuxer",
992			.item_name = av_default_item_name,
993			.option = ff_rtsp_options,
994			.version = LIBAVUTIL_VERSION_INT,
995			};
996
997			const FFInputFormat ff_rtsp_demuxer = {
998			.p.name = "rtsp",
999			.p.long_name = NULL_IF_CONFIG_SMALL("RTSP input"),
1000			.p.flags = AVFMT_NOFILE,
1001			.p.priv_class = &rtsp_demuxer_class,
1002			.priv_data_size = sizeof(RTSPState),
1003			.read_probe = rtsp_probe,
1004			.read_header = rtsp_read_header,
1005			.read_packet = rtsp_read_packet,
1006			.read_close = rtsp_read_close,
1007			.read_seek = rtsp_read_seek,
1008			.read_play = rtsp_read_play,
1009			.read_pause = rtsp_read_pause,
1010			};
1011