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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
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 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * 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
 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
#include "libavutil/base64.h"
23
#include "libavutil/avstring.h"
24
#include "libavutil/intreadwrite.h"
25
#include "libavutil/random_seed.h"
26
#include "avformat.h"
27

    
28
#include <sys/time.h>
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#if HAVE_POLL_H
30
#include <poll.h>
31
#endif
32
#include <strings.h>
33
#include "internal.h"
34
#include "network.h"
35
#include "os_support.h"
36
#include "http.h"
37
#include "rtsp.h"
38

    
39
#include "rtpdec.h"
40
#include "rdt.h"
41
#include "rtpdec_formats.h"
42
#include "rtpenc_chain.h"
43

    
44
//#define DEBUG
45
//#define DEBUG_RTP_TCP
46

    
47
/* Timeout values for socket poll, in ms,
48
 * and read_packet(), in seconds  */
49
#define POLL_TIMEOUT_MS 100
50
#define READ_PACKET_TIMEOUT_S 10
51
#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
52
#define SDP_MAX_SIZE 16384
53
#define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
54

    
55
static void get_word_until_chars(char *buf, int buf_size,
56
                                 const char *sep, const char **pp)
57
{
58
    const char *p;
59
    char *q;
60

    
61
    p = *pp;
62
    p += strspn(p, SPACE_CHARS);
63
    q = buf;
64
    while (!strchr(sep, *p) && *p != '\0') {
65
        if ((q - buf) < buf_size - 1)
66
            *q++ = *p;
67
        p++;
68
    }
69
    if (buf_size > 0)
70
        *q = '\0';
71
    *pp = p;
72
}
73

    
74
static void get_word_sep(char *buf, int buf_size, const char *sep,
75
                         const char **pp)
76
{
77
    if (**pp == '/') (*pp)++;
78
    get_word_until_chars(buf, buf_size, sep, pp);
79
}
80

    
81
static void get_word(char *buf, int buf_size, const char **pp)
82
{
83
    get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
84
}
85

    
86
/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
87
 *  and end time.
88
 *  Used for seeking in the rtp stream.
89
 */
90
static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
91
{
92
    char buf[256];
93

    
94
    p += strspn(p, SPACE_CHARS);
95
    if (!av_stristart(p, "npt=", &p))
96
        return;
97

    
98
    *start = AV_NOPTS_VALUE;
99
    *end = AV_NOPTS_VALUE;
100

    
101
    get_word_sep(buf, sizeof(buf), "-", &p);
102
    *start = parse_date(buf, 1);
103
    if (*p == '-') {
104
        p++;
105
        get_word_sep(buf, sizeof(buf), "-", &p);
106
        *end = parse_date(buf, 1);
107
    }
108
//    av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
109
//    av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
110
}
111

    
112
static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
113
{
114
    struct addrinfo hints, *ai = NULL;
115
    memset(&hints, 0, sizeof(hints));
116
    hints.ai_flags = AI_NUMERICHOST;
117
    if (getaddrinfo(buf, NULL, &hints, &ai))
118
        return -1;
119
    memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
120
    freeaddrinfo(ai);
121
    return 0;
122
}
123

    
124
#if CONFIG_RTPDEC
125
static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
126
                             RTSPStream *rtsp_st, AVCodecContext *codec)
127
{
128
    if (!handler)
129
        return;
130
    codec->codec_id          = handler->codec_id;
131
    rtsp_st->dynamic_handler = handler;
132
    if (handler->open)
133
        rtsp_st->dynamic_protocol_context = handler->open();
134
}
135

    
136
/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
137
static int sdp_parse_rtpmap(AVFormatContext *s,
138
                            AVStream *st, RTSPStream *rtsp_st,
139
                            int payload_type, const char *p)
140
{
141
    AVCodecContext *codec = st->codec;
142
    char buf[256];
143
    int i;
144
    AVCodec *c;
145
    const char *c_name;
146

    
147
    /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
148
     * see if we can handle this kind of payload.
149
     * The space should normally not be there but some Real streams or
150
     * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
151
     * have a trailing space. */
152
    get_word_sep(buf, sizeof(buf), "/ ", &p);
153
    if (payload_type >= RTP_PT_PRIVATE) {
154
        RTPDynamicProtocolHandler *handler =
155
            ff_rtp_handler_find_by_name(buf, codec->codec_type);
156
        init_rtp_handler(handler, rtsp_st, codec);
157
        /* If no dynamic handler was found, check with the list of standard
158
         * allocated types, if such a stream for some reason happens to
159
         * use a private payload type. This isn't handled in rtpdec.c, since
160
         * the format name from the rtpmap line never is passed into rtpdec. */
161
        if (!rtsp_st->dynamic_handler)
162
            codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
163
    } else {
164
        /* We are in a standard case
165
         * (from http://www.iana.org/assignments/rtp-parameters). */
166
        /* search into AVRtpPayloadTypes[] */
167
        codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
168
    }
169

    
170
    c = avcodec_find_decoder(codec->codec_id);
171
    if (c && c->name)
172
        c_name = c->name;
173
    else
174
        c_name = "(null)";
175

    
176
    get_word_sep(buf, sizeof(buf), "/", &p);
177
    i = atoi(buf);
178
    switch (codec->codec_type) {
179
    case AVMEDIA_TYPE_AUDIO:
180
        av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
181
        codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
182
        codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
183
        if (i > 0) {
184
            codec->sample_rate = i;
185
            av_set_pts_info(st, 32, 1, codec->sample_rate);
186
            get_word_sep(buf, sizeof(buf), "/", &p);
187
            i = atoi(buf);
188
            if (i > 0)
189
                codec->channels = i;
190
            // TODO: there is a bug here; if it is a mono stream, and
191
            // less than 22000Hz, faad upconverts to stereo and twice
192
            // the frequency.  No problem, but the sample rate is being
193
            // set here by the sdp line. Patch on its way. (rdm)
194
        }
195
        av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
196
               codec->sample_rate);
197
        av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
198
               codec->channels);
199
        break;
200
    case AVMEDIA_TYPE_VIDEO:
201
        av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
202
        if (i > 0)
203
            av_set_pts_info(st, 32, 1, i);
204
        break;
205
    default:
206
        break;
207
    }
208
    return 0;
209
}
210

    
211
/* parse the attribute line from the fmtp a line of an sdp response. This
212
 * is broken out as a function because it is used in rtp_h264.c, which is
213
 * forthcoming. */
214
int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
215
                                char *value, int value_size)
216
{
217
    *p += strspn(*p, SPACE_CHARS);
218
    if (**p) {
219
        get_word_sep(attr, attr_size, "=", p);
220
        if (**p == '=')
221
            (*p)++;
222
        get_word_sep(value, value_size, ";", p);
223
        if (**p == ';')
224
            (*p)++;
225
        return 1;
226
    }
227
    return 0;
228
}
229

    
230
typedef struct SDPParseState {
231
    /* SDP only */
232
    struct sockaddr_storage default_ip;
233
    int            default_ttl;
234
    int            skip_media;  ///< set if an unknown m= line occurs
235
} SDPParseState;
236

    
237
static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
238
                           int letter, const char *buf)
239
{
240
    RTSPState *rt = s->priv_data;
241
    char buf1[64], st_type[64];
242
    const char *p;
243
    enum AVMediaType codec_type;
244
    int payload_type, i;
245
    AVStream *st;
246
    RTSPStream *rtsp_st;
247
    struct sockaddr_storage sdp_ip;
248
    int ttl;
249

    
250
    av_dlog(s, "sdp: %c='%s'\n", letter, buf);
251

    
252
    p = buf;
253
    if (s1->skip_media && letter != 'm')
254
        return;
255
    switch (letter) {
256
    case 'c':
257
        get_word(buf1, sizeof(buf1), &p);
258
        if (strcmp(buf1, "IN") != 0)
259
            return;
260
        get_word(buf1, sizeof(buf1), &p);
261
        if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
262
            return;
263
        get_word_sep(buf1, sizeof(buf1), "/", &p);
264
        if (get_sockaddr(buf1, &sdp_ip))
265
            return;
266
        ttl = 16;
267
        if (*p == '/') {
268
            p++;
269
            get_word_sep(buf1, sizeof(buf1), "/", &p);
270
            ttl = atoi(buf1);
271
        }
272
        if (s->nb_streams == 0) {
273
            s1->default_ip = sdp_ip;
274
            s1->default_ttl = ttl;
275
        } else {
276
            rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
277
            rtsp_st->sdp_ip = sdp_ip;
278
            rtsp_st->sdp_ttl = ttl;
279
        }
280
        break;
281
    case 's':
282
        av_metadata_set2(&s->metadata, "title", p, 0);
283
        break;
284
    case 'i':
285
        if (s->nb_streams == 0) {
286
            av_metadata_set2(&s->metadata, "comment", p, 0);
287
            break;
288
        }
289
        break;
290
    case 'm':
291
        /* new stream */
292
        s1->skip_media = 0;
293
        get_word(st_type, sizeof(st_type), &p);
294
        if (!strcmp(st_type, "audio")) {
295
            codec_type = AVMEDIA_TYPE_AUDIO;
296
        } else if (!strcmp(st_type, "video")) {
297
            codec_type = AVMEDIA_TYPE_VIDEO;
298
        } else if (!strcmp(st_type, "application")) {
299
            codec_type = AVMEDIA_TYPE_DATA;
300
        } else {
301
            s1->skip_media = 1;
302
            return;
303
        }
304
        rtsp_st = av_mallocz(sizeof(RTSPStream));
305
        if (!rtsp_st)
306
            return;
307
        rtsp_st->stream_index = -1;
308
        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
309

    
310
        rtsp_st->sdp_ip = s1->default_ip;
311
        rtsp_st->sdp_ttl = s1->default_ttl;
312

    
313
        get_word(buf1, sizeof(buf1), &p); /* port */
314
        rtsp_st->sdp_port = atoi(buf1);
315

    
316
        get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
317

    
318
        /* XXX: handle list of formats */
319
        get_word(buf1, sizeof(buf1), &p); /* format list */
320
        rtsp_st->sdp_payload_type = atoi(buf1);
321

    
322
        if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
323
            /* no corresponding stream */
324
        } else {
325
            st = av_new_stream(s, 0);
326
            if (!st)
327
                return;
328
            rtsp_st->stream_index = st->index;
329
            st->codec->codec_type = codec_type;
330
            if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
331
                RTPDynamicProtocolHandler *handler;
332
                /* if standard payload type, we can find the codec right now */
333
                ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
334
                if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
335
                    st->codec->sample_rate > 0)
336
                    av_set_pts_info(st, 32, 1, st->codec->sample_rate);
337
                /* Even static payload types may need a custom depacketizer */
338
                handler = ff_rtp_handler_find_by_id(
339
                              rtsp_st->sdp_payload_type, st->codec->codec_type);
340
                init_rtp_handler(handler, rtsp_st, st->codec);
341
            }
342
        }
343
        /* put a default control url */
344
        av_strlcpy(rtsp_st->control_url, rt->control_uri,
345
                   sizeof(rtsp_st->control_url));
346
        break;
347
    case 'a':
348
        if (av_strstart(p, "control:", &p)) {
349
            if (s->nb_streams == 0) {
350
                if (!strncmp(p, "rtsp://", 7))
351
                    av_strlcpy(rt->control_uri, p,
352
                               sizeof(rt->control_uri));
353
            } else {
354
                char proto[32];
355
                /* get the control url */
356
                rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
357

    
358
                /* XXX: may need to add full url resolution */
359
                av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
360
                             NULL, NULL, 0, p);
361
                if (proto[0] == '\0') {
362
                    /* relative control URL */
363
                    if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
364
                    av_strlcat(rtsp_st->control_url, "/",
365
                               sizeof(rtsp_st->control_url));
366
                    av_strlcat(rtsp_st->control_url, p,
367
                               sizeof(rtsp_st->control_url));
368
                } else
369
                    av_strlcpy(rtsp_st->control_url, p,
370
                               sizeof(rtsp_st->control_url));
371
            }
372
        } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
373
            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
374
            get_word(buf1, sizeof(buf1), &p);
375
            payload_type = atoi(buf1);
376
            st = s->streams[s->nb_streams - 1];
377
            rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
378
            sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
379
        } else if (av_strstart(p, "fmtp:", &p) ||
380
                   av_strstart(p, "framesize:", &p)) {
381
            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
382
            // let dynamic protocol handlers have a stab at the line.
383
            get_word(buf1, sizeof(buf1), &p);
384
            payload_type = atoi(buf1);
385
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
386
                rtsp_st = rt->rtsp_streams[i];
387
                if (rtsp_st->sdp_payload_type == payload_type &&
388
                    rtsp_st->dynamic_handler &&
389
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
390
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
391
                        rtsp_st->dynamic_protocol_context, buf);
392
            }
393
        } else if (av_strstart(p, "range:", &p)) {
394
            int64_t start, end;
395

    
396
            // this is so that seeking on a streamed file can work.
397
            rtsp_parse_range_npt(p, &start, &end);
398
            s->start_time = start;
399
            /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
400
            s->duration   = (end == AV_NOPTS_VALUE) ?
401
                            AV_NOPTS_VALUE : end - start;
402
        } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
403
            if (atoi(p) == 1)
404
                rt->transport = RTSP_TRANSPORT_RDT;
405
        } else if (av_strstart(p, "SampleRate:integer;", &p) &&
406
                   s->nb_streams > 0) {
407
            st = s->streams[s->nb_streams - 1];
408
            st->codec->sample_rate = atoi(p);
409
        } else {
410
            if (rt->server_type == RTSP_SERVER_WMS)
411
                ff_wms_parse_sdp_a_line(s, p);
412
            if (s->nb_streams > 0) {
413
                if (rt->server_type == RTSP_SERVER_REAL)
414
                    ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
415

    
416
                rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
417
                if (rtsp_st->dynamic_handler &&
418
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
419
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s,
420
                        s->nb_streams - 1,
421
                        rtsp_st->dynamic_protocol_context, buf);
422
            }
423
        }
424
        break;
425
    }
426
}
427

    
428
/**
429
 * Parse the sdp description and allocate the rtp streams and the
430
 * pollfd array used for udp ones.
431
 */
432

    
433
int ff_sdp_parse(AVFormatContext *s, const char *content)
434
{
435
    RTSPState *rt = s->priv_data;
436
    const char *p;
437
    int letter;
438
    /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
439
     * contain long SDP lines containing complete ASF Headers (several
440
     * kB) or arrays of MDPR (RM stream descriptor) headers plus
441
     * "rulebooks" describing their properties. Therefore, the SDP line
442
     * buffer is large.
443
     *
444
     * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
445
     * in rtpdec_xiph.c. */
446
    char buf[16384], *q;
447
    SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
448

    
449
    memset(s1, 0, sizeof(SDPParseState));
450
    p = content;
451
    for (;;) {
452
        p += strspn(p, SPACE_CHARS);
453
        letter = *p;
454
        if (letter == '\0')
455
            break;
456
        p++;
457
        if (*p != '=')
458
            goto next_line;
459
        p++;
460
        /* get the content */
461
        q = buf;
462
        while (*p != '\n' && *p != '\r' && *p != '\0') {
463
            if ((q - buf) < sizeof(buf) - 1)
464
                *q++ = *p;
465
            p++;
466
        }
467
        *q = '\0';
468
        sdp_parse_line(s, s1, letter, buf);
469
    next_line:
470
        while (*p != '\n' && *p != '\0')
471
            p++;
472
        if (*p == '\n')
473
            p++;
474
    }
475
    rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
476
    if (!rt->p) return AVERROR(ENOMEM);
477
    return 0;
478
}
479
#endif /* CONFIG_RTPDEC */
480

    
481
void ff_rtsp_undo_setup(AVFormatContext *s)
482
{
483
    RTSPState *rt = s->priv_data;
484
    int i;
485

    
486
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
487
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
488
        if (!rtsp_st)
489
            continue;
490
        if (rtsp_st->transport_priv) {
491
            if (s->oformat) {
492
                AVFormatContext *rtpctx = rtsp_st->transport_priv;
493
                av_write_trailer(rtpctx);
494
                if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
495
                    uint8_t *ptr;
496
                    url_close_dyn_buf(rtpctx->pb, &ptr);
497
                    av_free(ptr);
498
                } else {
499
                    url_fclose(rtpctx->pb);
500
                }
501
                av_metadata_free(&rtpctx->streams[0]->metadata);
502
                av_metadata_free(&rtpctx->metadata);
503
                av_free(rtpctx->streams[0]->codec->extradata);
504
                av_free(rtpctx->streams[0]->codec);
505
                av_free(rtpctx->streams[0]->info);
506
                av_free(rtpctx->streams[0]);
507
                av_free(rtpctx);
508
            } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
509
                ff_rdt_parse_close(rtsp_st->transport_priv);
510
            else if (CONFIG_RTPDEC)
511
                rtp_parse_close(rtsp_st->transport_priv);
512
        }
513
        rtsp_st->transport_priv = NULL;
514
        if (rtsp_st->rtp_handle)
515
            url_close(rtsp_st->rtp_handle);
516
        rtsp_st->rtp_handle = NULL;
517
    }
518
}
519

    
520
/* close and free RTSP streams */
521
void ff_rtsp_close_streams(AVFormatContext *s)
522
{
523
    RTSPState *rt = s->priv_data;
524
    int i;
525
    RTSPStream *rtsp_st;
526

    
527
    ff_rtsp_undo_setup(s);
528
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
529
        rtsp_st = rt->rtsp_streams[i];
530
        if (rtsp_st) {
531
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
532
                rtsp_st->dynamic_handler->close(
533
                    rtsp_st->dynamic_protocol_context);
534
            av_free(rtsp_st);
535
        }
536
    }
537
    av_free(rt->rtsp_streams);
538
    if (rt->asf_ctx) {
539
        av_close_input_stream (rt->asf_ctx);
540
        rt->asf_ctx = NULL;
541
    }
542
    av_free(rt->p);
543
    av_free(rt->recvbuf);
544
}
545

    
546
static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
547
{
548
    RTSPState *rt = s->priv_data;
549
    AVStream *st = NULL;
550

    
551
    /* open the RTP context */
552
    if (rtsp_st->stream_index >= 0)
553
        st = s->streams[rtsp_st->stream_index];
554
    if (!st)
555
        s->ctx_flags |= AVFMTCTX_NOHEADER;
556

    
557
    if (s->oformat && CONFIG_RTSP_MUXER) {
558
        rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
559
                                      rtsp_st->rtp_handle,
560
                                      RTSP_TCP_MAX_PACKET_SIZE);
561
        /* Ownership of rtp_handle is passed to the rtp mux context */
562
        rtsp_st->rtp_handle = NULL;
563
    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
564
        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
565
                                            rtsp_st->dynamic_protocol_context,
566
                                            rtsp_st->dynamic_handler);
567
    else if (CONFIG_RTPDEC)
568
        rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
569
                                         rtsp_st->sdp_payload_type,
570
            (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
571
            ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
572

    
573
    if (!rtsp_st->transport_priv) {
574
         return AVERROR(ENOMEM);
575
    } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
576
        if (rtsp_st->dynamic_handler) {
577
            rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
578
                                           rtsp_st->dynamic_protocol_context,
579
                                           rtsp_st->dynamic_handler);
580
        }
581
    }
582

    
583
    return 0;
584
}
585

    
586
#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
587
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
588
{
589
    const char *p;
590
    int v;
591

    
592
    p = *pp;
593
    p += strspn(p, SPACE_CHARS);
594
    v = strtol(p, (char **)&p, 10);
595
    if (*p == '-') {
596
        p++;
597
        *min_ptr = v;
598
        v = strtol(p, (char **)&p, 10);
599
        *max_ptr = v;
600
    } else {
601
        *min_ptr = v;
602
        *max_ptr = v;
603
    }
604
    *pp = p;
605
}
606

    
607
/* XXX: only one transport specification is parsed */
608
static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
609
{
610
    char transport_protocol[16];
611
    char profile[16];
612
    char lower_transport[16];
613
    char parameter[16];
614
    RTSPTransportField *th;
615
    char buf[256];
616

    
617
    reply->nb_transports = 0;
618

    
619
    for (;;) {
620
        p += strspn(p, SPACE_CHARS);
621
        if (*p == '\0')
622
            break;
623

    
624
        th = &reply->transports[reply->nb_transports];
625

    
626
        get_word_sep(transport_protocol, sizeof(transport_protocol),
627
                     "/", &p);
628
        if (!strcasecmp (transport_protocol, "rtp")) {
629
            get_word_sep(profile, sizeof(profile), "/;,", &p);
630
            lower_transport[0] = '\0';
631
            /* rtp/avp/<protocol> */
632
            if (*p == '/') {
633
                get_word_sep(lower_transport, sizeof(lower_transport),
634
                             ";,", &p);
635
            }
636
            th->transport = RTSP_TRANSPORT_RTP;
637
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
638
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
639
            /* x-pn-tng/<protocol> */
640
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
641
            profile[0] = '\0';
642
            th->transport = RTSP_TRANSPORT_RDT;
643
        }
644
        if (!strcasecmp(lower_transport, "TCP"))
645
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
646
        else
647
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
648

    
649
        if (*p == ';')
650
            p++;
651
        /* get each parameter */
652
        while (*p != '\0' && *p != ',') {
653
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
654
            if (!strcmp(parameter, "port")) {
655
                if (*p == '=') {
656
                    p++;
657
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
658
                }
659
            } else if (!strcmp(parameter, "client_port")) {
660
                if (*p == '=') {
661
                    p++;
662
                    rtsp_parse_range(&th->client_port_min,
663
                                     &th->client_port_max, &p);
664
                }
665
            } else if (!strcmp(parameter, "server_port")) {
666
                if (*p == '=') {
667
                    p++;
668
                    rtsp_parse_range(&th->server_port_min,
669
                                     &th->server_port_max, &p);
670
                }
671
            } else if (!strcmp(parameter, "interleaved")) {
672
                if (*p == '=') {
673
                    p++;
674
                    rtsp_parse_range(&th->interleaved_min,
675
                                     &th->interleaved_max, &p);
676
                }
677
            } else if (!strcmp(parameter, "multicast")) {
678
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
679
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
680
            } else if (!strcmp(parameter, "ttl")) {
681
                if (*p == '=') {
682
                    p++;
683
                    th->ttl = strtol(p, (char **)&p, 10);
684
                }
685
            } else if (!strcmp(parameter, "destination")) {
686
                if (*p == '=') {
687
                    p++;
688
                    get_word_sep(buf, sizeof(buf), ";,", &p);
689
                    get_sockaddr(buf, &th->destination);
690
                }
691
            } else if (!strcmp(parameter, "source")) {
692
                if (*p == '=') {
693
                    p++;
694
                    get_word_sep(buf, sizeof(buf), ";,", &p);
695
                    av_strlcpy(th->source, buf, sizeof(th->source));
696
                }
697
            }
698

    
699
            while (*p != ';' && *p != '\0' && *p != ',')
700
                p++;
701
            if (*p == ';')
702
                p++;
703
        }
704
        if (*p == ',')
705
            p++;
706

    
707
        reply->nb_transports++;
708
    }
709
}
710

    
711
static void handle_rtp_info(RTSPState *rt, const char *url,
712
                            uint32_t seq, uint32_t rtptime)
713
{
714
    int i;
715
    if (!rtptime || !url[0])
716
        return;
717
    if (rt->transport != RTSP_TRANSPORT_RTP)
718
        return;
719
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
720
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
721
        RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
722
        if (!rtpctx)
723
            continue;
724
        if (!strcmp(rtsp_st->control_url, url)) {
725
            rtpctx->base_timestamp = rtptime;
726
            break;
727
        }
728
    }
729
}
730

    
731
static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
732
{
733
    int read = 0;
734
    char key[20], value[1024], url[1024] = "";
735
    uint32_t seq = 0, rtptime = 0;
736

    
737
    for (;;) {
738
        p += strspn(p, SPACE_CHARS);
739
        if (!*p)
740
            break;
741
        get_word_sep(key, sizeof(key), "=", &p);
742
        if (*p != '=')
743
            break;
744
        p++;
745
        get_word_sep(value, sizeof(value), ";, ", &p);
746
        read++;
747
        if (!strcmp(key, "url"))
748
            av_strlcpy(url, value, sizeof(url));
749
        else if (!strcmp(key, "seq"))
750
            seq = strtol(value, NULL, 10);
751
        else if (!strcmp(key, "rtptime"))
752
            rtptime = strtol(value, NULL, 10);
753
        if (*p == ',') {
754
            handle_rtp_info(rt, url, seq, rtptime);
755
            url[0] = '\0';
756
            seq = rtptime = 0;
757
            read = 0;
758
        }
759
        if (*p)
760
            p++;
761
    }
762
    if (read > 0)
763
        handle_rtp_info(rt, url, seq, rtptime);
764
}
765

    
766
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
767
                        RTSPState *rt, const char *method)
768
{
769
    const char *p;
770

    
771
    /* NOTE: we do case independent match for broken servers */
772
    p = buf;
773
    if (av_stristart(p, "Session:", &p)) {
774
        int t;
775
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
776
        if (av_stristart(p, ";timeout=", &p) &&
777
            (t = strtol(p, NULL, 10)) > 0) {
778
            reply->timeout = t;
779
        }
780
    } else if (av_stristart(p, "Content-Length:", &p)) {
781
        reply->content_length = strtol(p, NULL, 10);
782
    } else if (av_stristart(p, "Transport:", &p)) {
783
        rtsp_parse_transport(reply, p);
784
    } else if (av_stristart(p, "CSeq:", &p)) {
785
        reply->seq = strtol(p, NULL, 10);
786
    } else if (av_stristart(p, "Range:", &p)) {
787
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
788
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
789
        p += strspn(p, SPACE_CHARS);
790
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
791
    } else if (av_stristart(p, "Server:", &p)) {
792
        p += strspn(p, SPACE_CHARS);
793
        av_strlcpy(reply->server, p, sizeof(reply->server));
794
    } else if (av_stristart(p, "Notice:", &p) ||
795
               av_stristart(p, "X-Notice:", &p)) {
796
        reply->notice = strtol(p, NULL, 10);
797
    } else if (av_stristart(p, "Location:", &p)) {
798
        p += strspn(p, SPACE_CHARS);
799
        av_strlcpy(reply->location, p , sizeof(reply->location));
800
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
801
        p += strspn(p, SPACE_CHARS);
802
        ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
803
    } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
804
        p += strspn(p, SPACE_CHARS);
805
        ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
806
    } else if (av_stristart(p, "Content-Base:", &p) && rt) {
807
        p += strspn(p, SPACE_CHARS);
808
        if (method && !strcmp(method, "DESCRIBE"))
809
            av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
810
    } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
811
        p += strspn(p, SPACE_CHARS);
812
        if (method && !strcmp(method, "PLAY"))
813
            rtsp_parse_rtp_info(rt, p);
814
    }
815
}
816

    
817
/* skip a RTP/TCP interleaved packet */
818
void ff_rtsp_skip_packet(AVFormatContext *s)
819
{
820
    RTSPState *rt = s->priv_data;
821
    int ret, len, len1;
822
    uint8_t buf[1024];
823

    
824
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
825
    if (ret != 3)
826
        return;
827
    len = AV_RB16(buf + 1);
828

    
829
    av_dlog(s, "skipping RTP packet len=%d\n", len);
830

    
831
    /* skip payload */
832
    while (len > 0) {
833
        len1 = len;
834
        if (len1 > sizeof(buf))
835
            len1 = sizeof(buf);
836
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
837
        if (ret != len1)
838
            return;
839
        len -= len1;
840
    }
841
}
842

    
843
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
844
                       unsigned char **content_ptr,
845
                       int return_on_interleaved_data, const char *method)
846
{
847
    RTSPState *rt = s->priv_data;
848
    char buf[4096], buf1[1024], *q;
849
    unsigned char ch;
850
    const char *p;
851
    int ret, content_length, line_count = 0;
852
    unsigned char *content = NULL;
853

    
854
    memset(reply, 0, sizeof(*reply));
855

    
856
    /* parse reply (XXX: use buffers) */
857
    rt->last_reply[0] = '\0';
858
    for (;;) {
859
        q = buf;
860
        for (;;) {
861
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
862
#ifdef DEBUG_RTP_TCP
863
            av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
864
#endif
865
            if (ret != 1)
866
                return AVERROR_EOF;
867
            if (ch == '\n')
868
                break;
869
            if (ch == '$') {
870
                /* XXX: only parse it if first char on line ? */
871
                if (return_on_interleaved_data) {
872
                    return 1;
873
                } else
874
                    ff_rtsp_skip_packet(s);
875
            } else if (ch != '\r') {
876
                if ((q - buf) < sizeof(buf) - 1)
877
                    *q++ = ch;
878
            }
879
        }
880
        *q = '\0';
881

    
882
        av_dlog(s, "line='%s'\n", buf);
883

    
884
        /* test if last line */
885
        if (buf[0] == '\0')
886
            break;
887
        p = buf;
888
        if (line_count == 0) {
889
            /* get reply code */
890
            get_word(buf1, sizeof(buf1), &p);
891
            get_word(buf1, sizeof(buf1), &p);
892
            reply->status_code = atoi(buf1);
893
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
894
        } else {
895
            ff_rtsp_parse_line(reply, p, rt, method);
896
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
897
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
898
        }
899
        line_count++;
900
    }
901

    
902
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
903
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
904

    
905
    content_length = reply->content_length;
906
    if (content_length > 0) {
907
        /* leave some room for a trailing '\0' (useful for simple parsing) */
908
        content = av_malloc(content_length + 1);
909
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
910
        content[content_length] = '\0';
911
    }
912
    if (content_ptr)
913
        *content_ptr = content;
914
    else
915
        av_free(content);
916

    
917
    if (rt->seq != reply->seq) {
918
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
919
            rt->seq, reply->seq);
920
    }
921

    
922
    /* EOS */
923
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
924
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
925
        reply->notice == 2306 /* Continuous Feed Terminated */) {
926
        rt->state = RTSP_STATE_IDLE;
927
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
928
        return AVERROR(EIO); /* data or server error */
929
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
930
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
931
        return AVERROR(EPERM);
932

    
933
    return 0;
934
}
935

    
936
/**
937
 * Send a command to the RTSP server without waiting for the reply.
938
 *
939
 * @param s RTSP (de)muxer context
940
 * @param method the method for the request
941
 * @param url the target url for the request
942
 * @param headers extra header lines to include in the request
943
 * @param send_content if non-null, the data to send as request body content
944
 * @param send_content_length the length of the send_content data, or 0 if
945
 *                            send_content is null
946
 *
947
 * @return zero if success, nonzero otherwise
948
 */
949
static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
950
                                               const char *method, const char *url,
951
                                               const char *headers,
952
                                               const unsigned char *send_content,
953
                                               int send_content_length)
954
{
955
    RTSPState *rt = s->priv_data;
956
    char buf[4096], *out_buf;
957
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
958

    
959
    /* Add in RTSP headers */
960
    out_buf = buf;
961
    rt->seq++;
962
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
963
    if (headers)
964
        av_strlcat(buf, headers, sizeof(buf));
965
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
966
    if (rt->session_id[0] != '\0' && (!headers ||
967
        !strstr(headers, "\nIf-Match:"))) {
968
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
969
    }
970
    if (rt->auth[0]) {
971
        char *str = ff_http_auth_create_response(&rt->auth_state,
972
                                                 rt->auth, url, method);
973
        if (str)
974
            av_strlcat(buf, str, sizeof(buf));
975
        av_free(str);
976
    }
977
    if (send_content_length > 0 && send_content)
978
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
979
    av_strlcat(buf, "\r\n", sizeof(buf));
980

    
981
    /* base64 encode rtsp if tunneling */
982
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
983
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
984
        out_buf = base64buf;
985
    }
986

    
987
    av_dlog(s, "Sending:\n%s--\n", buf);
988

    
989
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
990
    if (send_content_length > 0 && send_content) {
991
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
992
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
993
                                    "with content data not supported\n");
994
            return AVERROR_PATCHWELCOME;
995
        }
996
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
997
    }
998
    rt->last_cmd_time = av_gettime();
999

    
1000
    return 0;
1001
}
1002

    
1003
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1004
                           const char *url, const char *headers)
1005
{
1006
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1007
}
1008

    
1009
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1010
                     const char *headers, RTSPMessageHeader *reply,
1011
                     unsigned char **content_ptr)
1012
{
1013
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1014
                                         content_ptr, NULL, 0);
1015
}
1016

    
1017
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1018
                                  const char *method, const char *url,
1019
                                  const char *header,
1020
                                  RTSPMessageHeader *reply,
1021
                                  unsigned char **content_ptr,
1022
                                  const unsigned char *send_content,
1023
                                  int send_content_length)
1024
{
1025
    RTSPState *rt = s->priv_data;
1026
    HTTPAuthType cur_auth_type;
1027
    int ret;
1028

    
1029
retry:
1030
    cur_auth_type = rt->auth_state.auth_type;
1031
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1032
                                                   send_content,
1033
                                                   send_content_length)))
1034
        return ret;
1035

    
1036
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1037
        return ret;
1038

    
1039
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1040
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
1041
        goto retry;
1042

    
1043
    if (reply->status_code > 400){
1044
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1045
               method,
1046
               reply->status_code,
1047
               reply->reason);
1048
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1049
    }
1050

    
1051
    return 0;
1052
}
1053

    
1054
/**
1055
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1056
 */
1057
int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1058
                              int lower_transport, const char *real_challenge)
1059
{
1060
    RTSPState *rt = s->priv_data;
1061
    int rtx, j, i, err, interleave = 0;
1062
    RTSPStream *rtsp_st;
1063
    RTSPMessageHeader reply1, *reply = &reply1;
1064
    char cmd[2048];
1065
    const char *trans_pref;
1066

    
1067
    if (rt->transport == RTSP_TRANSPORT_RDT)
1068
        trans_pref = "x-pn-tng";
1069
    else
1070
        trans_pref = "RTP/AVP";
1071

    
1072
    /* default timeout: 1 minute */
1073
    rt->timeout = 60;
1074

    
1075
    /* for each stream, make the setup request */
1076
    /* XXX: we assume the same server is used for the control of each
1077
     * RTSP stream */
1078

    
1079
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1080
        char transport[2048];
1081

    
1082
        /**
1083
         * WMS serves all UDP data over a single connection, the RTX, which
1084
         * isn't necessarily the first in the SDP but has to be the first
1085
         * to be set up, else the second/third SETUP will fail with a 461.
1086
         */
1087
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1088
             rt->server_type == RTSP_SERVER_WMS) {
1089
            if (i == 0) {
1090
                /* rtx first */
1091
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1092
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
1093
                    if (len >= 4 &&
1094
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1095
                                "/rtx"))
1096
                        break;
1097
                }
1098
                if (rtx == rt->nb_rtsp_streams)
1099
                    return -1; /* no RTX found */
1100
                rtsp_st = rt->rtsp_streams[rtx];
1101
            } else
1102
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1103
        } else
1104
            rtsp_st = rt->rtsp_streams[i];
1105

    
1106
        /* RTP/UDP */
1107
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1108
            char buf[256];
1109

    
1110
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1111
                port = reply->transports[0].client_port_min;
1112
                goto have_port;
1113
            }
1114

    
1115
            /* first try in specified port range */
1116
            if (RTSP_RTP_PORT_MIN != 0) {
1117
                while (j <= RTSP_RTP_PORT_MAX) {
1118
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1119
                                "?localport=%d", j);
1120
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1121
                    j += 2;
1122
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1123
                        goto rtp_opened;
1124
                }
1125
            }
1126

    
1127
#if 0
1128
            /* then try on any port */
1129
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1130
                err = AVERROR_INVALIDDATA;
1131
                goto fail;
1132
            }
1133
#else
1134
            av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1135
            err = AVERROR(EIO);
1136
            goto fail;
1137
#endif
1138

    
1139
        rtp_opened:
1140
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1141
        have_port:
1142
            snprintf(transport, sizeof(transport) - 1,
1143
                     "%s/UDP;", trans_pref);
1144
            if (rt->server_type != RTSP_SERVER_REAL)
1145
                av_strlcat(transport, "unicast;", sizeof(transport));
1146
            av_strlcatf(transport, sizeof(transport),
1147
                     "client_port=%d", port);
1148
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1149
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1150
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1151
        }
1152

    
1153
        /* RTP/TCP */
1154
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1155
            /** For WMS streams, the application streams are only used for
1156
             * UDP. When trying to set it up for TCP streams, the server
1157
             * will return an error. Therefore, we skip those streams. */
1158
            if (rt->server_type == RTSP_SERVER_WMS &&
1159
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1160
                    AVMEDIA_TYPE_DATA)
1161
                continue;
1162
            snprintf(transport, sizeof(transport) - 1,
1163
                     "%s/TCP;", trans_pref);
1164
            if (rt->server_type == RTSP_SERVER_WMS)
1165
                av_strlcat(transport, "unicast;", sizeof(transport));
1166
            av_strlcatf(transport, sizeof(transport),
1167
                        "interleaved=%d-%d",
1168
                        interleave, interleave + 1);
1169
            interleave += 2;
1170
        }
1171

    
1172
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1173
            snprintf(transport, sizeof(transport) - 1,
1174
                     "%s/UDP;multicast", trans_pref);
1175
        }
1176
        if (s->oformat) {
1177
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1178
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1179
                   rt->server_type == RTSP_SERVER_WMS)
1180
            av_strlcat(transport, ";mode=play", sizeof(transport));
1181
        snprintf(cmd, sizeof(cmd),
1182
                 "Transport: %s\r\n",
1183
                 transport);
1184
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1185
            char real_res[41], real_csum[9];
1186
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1187
                                              real_challenge);
1188
            av_strlcatf(cmd, sizeof(cmd),
1189
                        "If-Match: %s\r\n"
1190
                        "RealChallenge2: %s, sd=%s\r\n",
1191
                        rt->session_id, real_res, real_csum);
1192
        }
1193
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1194
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1195
            err = 1;
1196
            goto fail;
1197
        } else if (reply->status_code != RTSP_STATUS_OK ||
1198
                   reply->nb_transports != 1) {
1199
            err = AVERROR_INVALIDDATA;
1200
            goto fail;
1201
        }
1202

    
1203
        /* XXX: same protocol for all streams is required */
1204
        if (i > 0) {
1205
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1206
                reply->transports[0].transport != rt->transport) {
1207
                err = AVERROR_INVALIDDATA;
1208
                goto fail;
1209
            }
1210
        } else {
1211
            rt->lower_transport = reply->transports[0].lower_transport;
1212
            rt->transport = reply->transports[0].transport;
1213
        }
1214

    
1215
        /* Fail if the server responded with another lower transport mode
1216
         * than what we requested. */
1217
        if (reply->transports[0].lower_transport != lower_transport) {
1218
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1219
            err = AVERROR_INVALIDDATA;
1220
            goto fail;
1221
        }
1222

    
1223
        switch(reply->transports[0].lower_transport) {
1224
        case RTSP_LOWER_TRANSPORT_TCP:
1225
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1226
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1227
            break;
1228

    
1229
        case RTSP_LOWER_TRANSPORT_UDP: {
1230
            char url[1024], options[30] = "";
1231

    
1232
            if (rt->filter_source)
1233
                av_strlcpy(options, "?connect=1", sizeof(options));
1234
            /* Use source address if specified */
1235
            if (reply->transports[0].source[0]) {
1236
                ff_url_join(url, sizeof(url), "rtp", NULL,
1237
                            reply->transports[0].source,
1238
                            reply->transports[0].server_port_min, options);
1239
            } else {
1240
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1241
                            reply->transports[0].server_port_min, options);
1242
            }
1243
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1244
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1245
                err = AVERROR_INVALIDDATA;
1246
                goto fail;
1247
            }
1248
            /* Try to initialize the connection state in a
1249
             * potential NAT router by sending dummy packets.
1250
             * RTP/RTCP dummy packets are used for RDT, too.
1251
             */
1252
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1253
                CONFIG_RTPDEC)
1254
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1255
            break;
1256
        }
1257
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1258
            char url[1024], namebuf[50];
1259
            struct sockaddr_storage addr;
1260
            int port, ttl;
1261

    
1262
            if (reply->transports[0].destination.ss_family) {
1263
                addr      = reply->transports[0].destination;
1264
                port      = reply->transports[0].port_min;
1265
                ttl       = reply->transports[0].ttl;
1266
            } else {
1267
                addr      = rtsp_st->sdp_ip;
1268
                port      = rtsp_st->sdp_port;
1269
                ttl       = rtsp_st->sdp_ttl;
1270
            }
1271
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1272
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1273
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1274
                        port, "?ttl=%d", ttl);
1275
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1276
                err = AVERROR_INVALIDDATA;
1277
                goto fail;
1278
            }
1279
            break;
1280
        }
1281
        }
1282

    
1283
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1284
            goto fail;
1285
    }
1286

    
1287
    if (reply->timeout > 0)
1288
        rt->timeout = reply->timeout;
1289

    
1290
    if (rt->server_type == RTSP_SERVER_REAL)
1291
        rt->need_subscription = 1;
1292

    
1293
    return 0;
1294

    
1295
fail:
1296
    ff_rtsp_undo_setup(s);
1297
    return err;
1298
}
1299

    
1300
void ff_rtsp_close_connections(AVFormatContext *s)
1301
{
1302
    RTSPState *rt = s->priv_data;
1303
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1304
    url_close(rt->rtsp_hd);
1305
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1306
}
1307

    
1308
int ff_rtsp_connect(AVFormatContext *s)
1309
{
1310
    RTSPState *rt = s->priv_data;
1311
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1312
    char *option_list, *option, *filename;
1313
    int port, err, tcp_fd;
1314
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1315
    int lower_transport_mask = 0;
1316
    char real_challenge[64] = "";
1317
    struct sockaddr_storage peer;
1318
    socklen_t peer_len = sizeof(peer);
1319

    
1320
    if (!ff_network_init())
1321
        return AVERROR(EIO);
1322
redirect:
1323
    rt->control_transport = RTSP_MODE_PLAIN;
1324
    /* extract hostname and port */
1325
    av_url_split(NULL, 0, auth, sizeof(auth),
1326
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1327
    if (*auth) {
1328
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1329
    }
1330
    if (port < 0)
1331
        port = RTSP_DEFAULT_PORT;
1332

    
1333
    /* search for options */
1334
    option_list = strrchr(path, '?');
1335
    if (option_list) {
1336
        /* Strip out the RTSP specific options, write out the rest of
1337
         * the options back into the same string. */
1338
        filename = option_list;
1339
        while (option_list) {
1340
            /* move the option pointer */
1341
            option = ++option_list;
1342
            option_list = strchr(option_list, '&');
1343
            if (option_list)
1344
                *option_list = 0;
1345

    
1346
            /* handle the options */
1347
            if (!strcmp(option, "udp")) {
1348
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1349
            } else if (!strcmp(option, "multicast")) {
1350
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1351
            } else if (!strcmp(option, "tcp")) {
1352
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1353
            } else if(!strcmp(option, "http")) {
1354
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1355
                rt->control_transport = RTSP_MODE_TUNNEL;
1356
            } else if (!strcmp(option, "filter_src")) {
1357
                rt->filter_source = 1;
1358
            } else {
1359
                /* Write options back into the buffer, using memmove instead
1360
                 * of strcpy since the strings may overlap. */
1361
                int len = strlen(option);
1362
                memmove(++filename, option, len);
1363
                filename += len;
1364
                if (option_list) *filename = '&';
1365
            }
1366
        }
1367
        *filename = 0;
1368
    }
1369

    
1370
    if (!lower_transport_mask)
1371
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1372

    
1373
    if (s->oformat) {
1374
        /* Only UDP or TCP - UDP multicast isn't supported. */
1375
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1376
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1377
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1378
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1379
                                    "only UDP and TCP are supported for output.\n");
1380
            err = AVERROR(EINVAL);
1381
            goto fail;
1382
        }
1383
    }
1384

    
1385
    /* Construct the URI used in request; this is similar to s->filename,
1386
     * but with authentication credentials removed and RTSP specific options
1387
     * stripped out. */
1388
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1389
                host, port, "%s", path);
1390

    
1391
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1392
        /* set up initial handshake for tunneling */
1393
        char httpname[1024];
1394
        char sessioncookie[17];
1395
        char headers[1024];
1396

    
1397
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1398
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1399
                 av_get_random_seed(), av_get_random_seed());
1400

    
1401
        /* GET requests */
1402
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1403
            err = AVERROR(EIO);
1404
            goto fail;
1405
        }
1406

    
1407
        /* generate GET headers */
1408
        snprintf(headers, sizeof(headers),
1409
                 "x-sessioncookie: %s\r\n"
1410
                 "Accept: application/x-rtsp-tunnelled\r\n"
1411
                 "Pragma: no-cache\r\n"
1412
                 "Cache-Control: no-cache\r\n",
1413
                 sessioncookie);
1414
        ff_http_set_headers(rt->rtsp_hd, headers);
1415

    
1416
        /* complete the connection */
1417
        if (url_connect(rt->rtsp_hd)) {
1418
            err = AVERROR(EIO);
1419
            goto fail;
1420
        }
1421

    
1422
        /* POST requests */
1423
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1424
            err = AVERROR(EIO);
1425
            goto fail;
1426
        }
1427

    
1428
        /* generate POST headers */
1429
        snprintf(headers, sizeof(headers),
1430
                 "x-sessioncookie: %s\r\n"
1431
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1432
                 "Pragma: no-cache\r\n"
1433
                 "Cache-Control: no-cache\r\n"
1434
                 "Content-Length: 32767\r\n"
1435
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1436
                 sessioncookie);
1437
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1438
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1439

    
1440
        /* Initialize the authentication state for the POST session. The HTTP
1441
         * protocol implementation doesn't properly handle multi-pass
1442
         * authentication for POST requests, since it would require one of
1443
         * the following:
1444
         * - implementing Expect: 100-continue, which many HTTP servers
1445
         *   don't support anyway, even less the RTSP servers that do HTTP
1446
         *   tunneling
1447
         * - sending the whole POST data until getting a 401 reply specifying
1448
         *   what authentication method to use, then resending all that data
1449
         * - waiting for potential 401 replies directly after sending the
1450
         *   POST header (waiting for some unspecified time)
1451
         * Therefore, we copy the full auth state, which works for both basic
1452
         * and digest. (For digest, we would have to synchronize the nonce
1453
         * count variable between the two sessions, if we'd do more requests
1454
         * with the original session, though.)
1455
         */
1456
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1457

    
1458
        /* complete the connection */
1459
        if (url_connect(rt->rtsp_hd_out)) {
1460
            err = AVERROR(EIO);
1461
            goto fail;
1462
        }
1463
    } else {
1464
        /* open the tcp connection */
1465
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1466
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1467
            err = AVERROR(EIO);
1468
            goto fail;
1469
        }
1470
        rt->rtsp_hd_out = rt->rtsp_hd;
1471
    }
1472
    rt->seq = 0;
1473

    
1474
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1475
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1476
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1477
                    NULL, 0, NI_NUMERICHOST);
1478
    }
1479

    
1480
    /* request options supported by the server; this also detects server
1481
     * type */
1482
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1483
        cmd[0] = 0;
1484
        if (rt->server_type == RTSP_SERVER_REAL)
1485
            av_strlcat(cmd,
1486
                       /**
1487
                        * The following entries are required for proper
1488
                        * streaming from a Realmedia server. They are
1489
                        * interdependent in some way although we currently
1490
                        * don't quite understand how. Values were copied
1491
                        * from mplayer SVN r23589.
1492
                        * @param CompanyID is a 16-byte ID in base64
1493
                        * @param ClientChallenge is a 16-byte ID in hex
1494
                        */
1495
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1496
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1497
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1498
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1499
                       sizeof(cmd));
1500
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1501
        if (reply->status_code != RTSP_STATUS_OK) {
1502
            err = AVERROR_INVALIDDATA;
1503
            goto fail;
1504
        }
1505

    
1506
        /* detect server type if not standard-compliant RTP */
1507
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1508
            rt->server_type = RTSP_SERVER_REAL;
1509
            continue;
1510
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1511
            rt->server_type = RTSP_SERVER_WMS;
1512
        } else if (rt->server_type == RTSP_SERVER_REAL)
1513
            strcpy(real_challenge, reply->real_challenge);
1514
        break;
1515
    }
1516

    
1517
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1518
        err = ff_rtsp_setup_input_streams(s, reply);
1519
    else if (CONFIG_RTSP_MUXER)
1520
        err = ff_rtsp_setup_output_streams(s, host);
1521
    if (err)
1522
        goto fail;
1523

    
1524
    do {
1525
        int lower_transport = ff_log2_tab[lower_transport_mask &
1526
                                  ~(lower_transport_mask - 1)];
1527

    
1528
        err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1529
                                 rt->server_type == RTSP_SERVER_REAL ?
1530
                                     real_challenge : NULL);
1531
        if (err < 0)
1532
            goto fail;
1533
        lower_transport_mask &= ~(1 << lower_transport);
1534
        if (lower_transport_mask == 0 && err == 1) {
1535
            err = FF_NETERROR(EPROTONOSUPPORT);
1536
            goto fail;
1537
        }
1538
    } while (err);
1539

    
1540
    rt->lower_transport_mask = lower_transport_mask;
1541
    av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1542
    rt->state = RTSP_STATE_IDLE;
1543
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1544
    return 0;
1545
 fail:
1546
    ff_rtsp_close_streams(s);
1547
    ff_rtsp_close_connections(s);
1548
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1549
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1550
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1551
               reply->status_code,
1552
               s->filename);
1553
        goto redirect;
1554
    }
1555
    ff_network_close();
1556
    return err;
1557
}
1558
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1559

    
1560
#if CONFIG_RTPDEC
1561
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1562
                           uint8_t *buf, int buf_size, int64_t wait_end)
1563
{
1564
    RTSPState *rt = s->priv_data;
1565
    RTSPStream *rtsp_st;
1566
    int n, i, ret, tcp_fd, timeout_cnt = 0;
1567
    int max_p = 0;
1568
    struct pollfd *p = rt->p;
1569

    
1570
    for (;;) {
1571
        if (url_interrupt_cb())
1572
            return AVERROR(EINTR);
1573
        if (wait_end && wait_end - av_gettime() < 0)
1574
            return AVERROR(EAGAIN);
1575
        max_p = 0;
1576
        if (rt->rtsp_hd) {
1577
            tcp_fd = url_get_file_handle(rt->rtsp_hd);
1578
            p[max_p].fd = tcp_fd;
1579
            p[max_p++].events = POLLIN;
1580
        } else {
1581
            tcp_fd = -1;
1582
        }
1583
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1584
            rtsp_st = rt->rtsp_streams[i];
1585
            if (rtsp_st->rtp_handle) {
1586
                p[max_p].fd = url_get_file_handle(rtsp_st->rtp_handle);
1587
                p[max_p++].events = POLLIN;
1588
                p[max_p].fd = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1589
                p[max_p++].events = POLLIN;
1590
            }
1591
        }
1592
        n = poll(p, max_p, POLL_TIMEOUT_MS);
1593
        if (n > 0) {
1594
            int j = 1 - (tcp_fd == -1);
1595
            timeout_cnt = 0;
1596
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1597
                rtsp_st = rt->rtsp_streams[i];
1598
                if (rtsp_st->rtp_handle) {
1599
                    if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1600
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1601
                        if (ret > 0) {
1602
                            *prtsp_st = rtsp_st;
1603
                            return ret;
1604
                        }
1605
                    }
1606
                    j+=2;
1607
                }
1608
            }
1609
#if CONFIG_RTSP_DEMUXER
1610
            if (tcp_fd != -1 && p[0].revents & POLLIN) {
1611
                RTSPMessageHeader reply;
1612

    
1613
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1614
                if (ret < 0)
1615
                    return ret;
1616
                /* XXX: parse message */
1617
                if (rt->state != RTSP_STATE_STREAMING)
1618
                    return 0;
1619
            }
1620
#endif
1621
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1622
            return FF_NETERROR(ETIMEDOUT);
1623
        } else if (n < 0 && errno != EINTR)
1624
            return AVERROR(errno);
1625
    }
1626
}
1627

    
1628
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1629
{
1630
    RTSPState *rt = s->priv_data;
1631
    int ret, len;
1632
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1633
    int64_t wait_end = 0;
1634

    
1635
    if (rt->nb_byes == rt->nb_rtsp_streams)
1636
        return AVERROR_EOF;
1637

    
1638
    /* get next frames from the same RTP packet */
1639
    if (rt->cur_transport_priv) {
1640
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1641
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1642
        } else
1643
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1644
        if (ret == 0) {
1645
            rt->cur_transport_priv = NULL;
1646
            return 0;
1647
        } else if (ret == 1) {
1648
            return 0;
1649
        } else
1650
            rt->cur_transport_priv = NULL;
1651
    }
1652

    
1653
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1654
        int i;
1655
        int64_t first_queue_time = 0;
1656
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1657
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1658
            int64_t queue_time;
1659
            if (!rtpctx)
1660
                continue;
1661
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1662
            if (queue_time && (queue_time - first_queue_time < 0 ||
1663
                               !first_queue_time)) {
1664
                first_queue_time = queue_time;
1665
                first_queue_st   = rt->rtsp_streams[i];
1666
            }
1667
        }
1668
        if (first_queue_time)
1669
            wait_end = first_queue_time + s->max_delay;
1670
    }
1671

    
1672
    /* read next RTP packet */
1673
 redo:
1674
    if (!rt->recvbuf) {
1675
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1676
        if (!rt->recvbuf)
1677
            return AVERROR(ENOMEM);
1678
    }
1679

    
1680
    switch(rt->lower_transport) {
1681
    default:
1682
#if CONFIG_RTSP_DEMUXER
1683
    case RTSP_LOWER_TRANSPORT_TCP:
1684
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1685
        break;
1686
#endif
1687
    case RTSP_LOWER_TRANSPORT_UDP:
1688
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1689
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1690
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1691
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1692
        break;
1693
    }
1694
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1695
        rt->transport == RTSP_TRANSPORT_RTP) {
1696
        rtsp_st = first_queue_st;
1697
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1698
        goto end;
1699
    }
1700
    if (len < 0)
1701
        return len;
1702
    if (len == 0)
1703
        return AVERROR_EOF;
1704
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1705
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1706
    } else {
1707
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1708
        if (ret < 0) {
1709
            /* Either bad packet, or a RTCP packet. Check if the
1710
             * first_rtcp_ntp_time field was initialized. */
1711
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1712
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1713
                /* first_rtcp_ntp_time has been initialized for this stream,
1714
                 * copy the same value to all other uninitialized streams,
1715
                 * in order to map their timestamp origin to the same ntp time
1716
                 * as this one. */
1717
                int i;
1718
                AVStream *st = NULL;
1719
                if (rtsp_st->stream_index >= 0)
1720
                    st = s->streams[rtsp_st->stream_index];
1721
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1722
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1723
                    AVStream *st2 = NULL;
1724
                    if (rt->rtsp_streams[i]->stream_index >= 0)
1725
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1726
                    if (rtpctx2 && st && st2 &&
1727
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1728
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1729
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
1730
                            rtpctx->rtcp_ts_offset, st->time_base,
1731
                            st2->time_base);
1732
                    }
1733
                }
1734
            }
1735
            if (ret == -RTCP_BYE) {
1736
                rt->nb_byes++;
1737

    
1738
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1739
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1740

    
1741
                if (rt->nb_byes == rt->nb_rtsp_streams)
1742
                    return AVERROR_EOF;
1743
            }
1744
        }
1745
    }
1746
end:
1747
    if (ret < 0)
1748
        goto redo;
1749
    if (ret == 1)
1750
        /* more packets may follow, so we save the RTP context */
1751
        rt->cur_transport_priv = rtsp_st->transport_priv;
1752

    
1753
    return ret;
1754
}
1755
#endif /* CONFIG_RTPDEC */
1756

    
1757
#if CONFIG_SDP_DEMUXER
1758
static int sdp_probe(AVProbeData *p1)
1759
{
1760
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1761

    
1762
    /* we look for a line beginning "c=IN IP" */
1763
    while (p < p_end && *p != '\0') {
1764
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1765
            av_strstart(p, "c=IN IP", NULL))
1766
            return AVPROBE_SCORE_MAX / 2;
1767

    
1768
        while (p < p_end - 1 && *p != '\n') p++;
1769
        if (++p >= p_end)
1770
            break;
1771
        if (*p == '\r')
1772
            p++;
1773
    }
1774
    return 0;
1775
}
1776

    
1777
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1778
{
1779
    RTSPState *rt = s->priv_data;
1780
    RTSPStream *rtsp_st;
1781
    int size, i, err;
1782
    char *content;
1783
    char url[1024];
1784

    
1785
    if (!ff_network_init())
1786
        return AVERROR(EIO);
1787

    
1788
    /* read the whole sdp file */
1789
    /* XXX: better loading */
1790
    content = av_malloc(SDP_MAX_SIZE);
1791
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1792
    if (size <= 0) {
1793
        av_free(content);
1794
        return AVERROR_INVALIDDATA;
1795
    }
1796
    content[size] ='\0';
1797

    
1798
    err = ff_sdp_parse(s, content);
1799
    av_free(content);
1800
    if (err) goto fail;
1801

    
1802
    /* open each RTP stream */
1803
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1804
        char namebuf[50];
1805
        rtsp_st = rt->rtsp_streams[i];
1806

    
1807
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1808
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1809
        ff_url_join(url, sizeof(url), "rtp", NULL,
1810
                    namebuf, rtsp_st->sdp_port,
1811
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1812
                    rtsp_st->sdp_ttl);
1813
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1814
            err = AVERROR_INVALIDDATA;
1815
            goto fail;
1816
        }
1817
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1818
            goto fail;
1819
    }
1820
    return 0;
1821
fail:
1822
    ff_rtsp_close_streams(s);
1823
    ff_network_close();
1824
    return err;
1825
}
1826

    
1827
static int sdp_read_close(AVFormatContext *s)
1828
{
1829
    ff_rtsp_close_streams(s);
1830
    ff_network_close();
1831
    return 0;
1832
}
1833

    
1834
AVInputFormat ff_sdp_demuxer = {
1835
    "sdp",
1836
    NULL_IF_CONFIG_SMALL("SDP"),
1837
    sizeof(RTSPState),
1838
    sdp_probe,
1839
    sdp_read_header,
1840
    ff_rtsp_fetch_packet,
1841
    sdp_read_close,
1842
};
1843
#endif /* CONFIG_SDP_DEMUXER */
1844

    
1845
#if CONFIG_RTP_DEMUXER
1846
static int rtp_probe(AVProbeData *p)
1847
{
1848
    if (av_strstart(p->filename, "rtp:", NULL))
1849
        return AVPROBE_SCORE_MAX;
1850
    return 0;
1851
}
1852

    
1853
static int rtp_read_header(AVFormatContext *s,
1854
                           AVFormatParameters *ap)
1855
{
1856
    uint8_t recvbuf[1500];
1857
    char host[500], sdp[500];
1858
    int ret, port;
1859
    URLContext* in = NULL;
1860
    int payload_type;
1861
    AVCodecContext codec;
1862
    struct sockaddr_storage addr;
1863
    ByteIOContext pb;
1864
    socklen_t addrlen = sizeof(addr);
1865

    
1866
    if (!ff_network_init())
1867
        return AVERROR(EIO);
1868

    
1869
    ret = url_open(&in, s->filename, URL_RDONLY);
1870
    if (ret)
1871
        goto fail;
1872

    
1873
    while (1) {
1874
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1875
        if (ret == AVERROR(EAGAIN))
1876
            continue;
1877
        if (ret < 0)
1878
            goto fail;
1879
        if (ret < 12) {
1880
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1881
            continue;
1882
        }
1883

    
1884
        if ((recvbuf[0] & 0xc0) != 0x80) {
1885
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1886
                                      "received\n");
1887
            continue;
1888
        }
1889

    
1890
        payload_type = recvbuf[1] & 0x7f;
1891
        break;
1892
    }
1893
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1894
    url_close(in);
1895
    in = NULL;
1896

    
1897
    memset(&codec, 0, sizeof(codec));
1898
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1899
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1900
                                "without an SDP file describing it\n",
1901
                                 payload_type);
1902
        goto fail;
1903
    }
1904
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1905
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1906
                                  "properly you need an SDP file "
1907
                                  "describing it\n");
1908
    }
1909

    
1910
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1911
                 NULL, 0, s->filename);
1912

    
1913
    snprintf(sdp, sizeof(sdp),
1914
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1915
             addr.ss_family == AF_INET ? 4 : 6, host,
1916
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1917
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1918
             port, payload_type);
1919
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1920

    
1921
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1922
    s->pb = &pb;
1923

    
1924
    /* sdp_read_header initializes this again */
1925
    ff_network_close();
1926

    
1927
    ret = sdp_read_header(s, ap);
1928
    s->pb = NULL;
1929
    return ret;
1930

    
1931
fail:
1932
    if (in)
1933
        url_close(in);
1934
    ff_network_close();
1935
    return ret;
1936
}
1937

    
1938
AVInputFormat ff_rtp_demuxer = {
1939
    "rtp",
1940
    NULL_IF_CONFIG_SMALL("RTP input format"),
1941
    sizeof(RTSPState),
1942
    rtp_probe,
1943
    rtp_read_header,
1944
    ff_rtsp_fetch_packet,
1945
    sdp_read_close,
1946
    .flags = AVFMT_NOFILE,
1947
};
1948
#endif /* CONFIG_RTP_DEMUXER */
1949