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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
20
 */
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
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#include <poll.h>
31
#endif
32
#include <strings.h>
33
#include "internal.h"
34
#include "network.h"
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#include "os_support.h"
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#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
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#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]);
504
                av_free(rtpctx);
505
            } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
506
                ff_rdt_parse_close(rtsp_st->transport_priv);
507
            else if (CONFIG_RTPDEC)
508
                rtp_parse_close(rtsp_st->transport_priv);
509
        }
510
        rtsp_st->transport_priv = NULL;
511
        if (rtsp_st->rtp_handle)
512
            url_close(rtsp_st->rtp_handle);
513
        rtsp_st->rtp_handle = NULL;
514
    }
515
}
516

    
517
/* close and free RTSP streams */
518
void ff_rtsp_close_streams(AVFormatContext *s)
519
{
520
    RTSPState *rt = s->priv_data;
521
    int i;
522
    RTSPStream *rtsp_st;
523

    
524
    ff_rtsp_undo_setup(s);
525
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
526
        rtsp_st = rt->rtsp_streams[i];
527
        if (rtsp_st) {
528
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
529
                rtsp_st->dynamic_handler->close(
530
                    rtsp_st->dynamic_protocol_context);
531
            av_free(rtsp_st);
532
        }
533
    }
534
    av_free(rt->rtsp_streams);
535
    if (rt->asf_ctx) {
536
        av_close_input_stream (rt->asf_ctx);
537
        rt->asf_ctx = NULL;
538
    }
539
    av_free(rt->p);
540
    av_free(rt->recvbuf);
541
}
542

    
543
static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
544
{
545
    RTSPState *rt = s->priv_data;
546
    AVStream *st = NULL;
547

    
548
    /* open the RTP context */
549
    if (rtsp_st->stream_index >= 0)
550
        st = s->streams[rtsp_st->stream_index];
551
    if (!st)
552
        s->ctx_flags |= AVFMTCTX_NOHEADER;
553

    
554
    if (s->oformat && CONFIG_RTSP_MUXER) {
555
        rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
556
                                      rtsp_st->rtp_handle,
557
                                      RTSP_TCP_MAX_PACKET_SIZE);
558
        /* Ownership of rtp_handle is passed to the rtp mux context */
559
        rtsp_st->rtp_handle = NULL;
560
    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
561
        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
562
                                            rtsp_st->dynamic_protocol_context,
563
                                            rtsp_st->dynamic_handler);
564
    else if (CONFIG_RTPDEC)
565
        rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
566
                                         rtsp_st->sdp_payload_type,
567
            (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
568
            ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
569

    
570
    if (!rtsp_st->transport_priv) {
571
         return AVERROR(ENOMEM);
572
    } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
573
        if (rtsp_st->dynamic_handler) {
574
            rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
575
                                           rtsp_st->dynamic_protocol_context,
576
                                           rtsp_st->dynamic_handler);
577
        }
578
    }
579

    
580
    return 0;
581
}
582

    
583
#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
584
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
585
{
586
    const char *p;
587
    int v;
588

    
589
    p = *pp;
590
    p += strspn(p, SPACE_CHARS);
591
    v = strtol(p, (char **)&p, 10);
592
    if (*p == '-') {
593
        p++;
594
        *min_ptr = v;
595
        v = strtol(p, (char **)&p, 10);
596
        *max_ptr = v;
597
    } else {
598
        *min_ptr = v;
599
        *max_ptr = v;
600
    }
601
    *pp = p;
602
}
603

    
604
/* XXX: only one transport specification is parsed */
605
static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
606
{
607
    char transport_protocol[16];
608
    char profile[16];
609
    char lower_transport[16];
610
    char parameter[16];
611
    RTSPTransportField *th;
612
    char buf[256];
613

    
614
    reply->nb_transports = 0;
615

    
616
    for (;;) {
617
        p += strspn(p, SPACE_CHARS);
618
        if (*p == '\0')
619
            break;
620

    
621
        th = &reply->transports[reply->nb_transports];
622

    
623
        get_word_sep(transport_protocol, sizeof(transport_protocol),
624
                     "/", &p);
625
        if (!strcasecmp (transport_protocol, "rtp")) {
626
            get_word_sep(profile, sizeof(profile), "/;,", &p);
627
            lower_transport[0] = '\0';
628
            /* rtp/avp/<protocol> */
629
            if (*p == '/') {
630
                get_word_sep(lower_transport, sizeof(lower_transport),
631
                             ";,", &p);
632
            }
633
            th->transport = RTSP_TRANSPORT_RTP;
634
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
635
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
636
            /* x-pn-tng/<protocol> */
637
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
638
            profile[0] = '\0';
639
            th->transport = RTSP_TRANSPORT_RDT;
640
        }
641
        if (!strcasecmp(lower_transport, "TCP"))
642
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
643
        else
644
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
645

    
646
        if (*p == ';')
647
            p++;
648
        /* get each parameter */
649
        while (*p != '\0' && *p != ',') {
650
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
651
            if (!strcmp(parameter, "port")) {
652
                if (*p == '=') {
653
                    p++;
654
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
655
                }
656
            } else if (!strcmp(parameter, "client_port")) {
657
                if (*p == '=') {
658
                    p++;
659
                    rtsp_parse_range(&th->client_port_min,
660
                                     &th->client_port_max, &p);
661
                }
662
            } else if (!strcmp(parameter, "server_port")) {
663
                if (*p == '=') {
664
                    p++;
665
                    rtsp_parse_range(&th->server_port_min,
666
                                     &th->server_port_max, &p);
667
                }
668
            } else if (!strcmp(parameter, "interleaved")) {
669
                if (*p == '=') {
670
                    p++;
671
                    rtsp_parse_range(&th->interleaved_min,
672
                                     &th->interleaved_max, &p);
673
                }
674
            } else if (!strcmp(parameter, "multicast")) {
675
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
676
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
677
            } else if (!strcmp(parameter, "ttl")) {
678
                if (*p == '=') {
679
                    p++;
680
                    th->ttl = strtol(p, (char **)&p, 10);
681
                }
682
            } else if (!strcmp(parameter, "destination")) {
683
                if (*p == '=') {
684
                    p++;
685
                    get_word_sep(buf, sizeof(buf), ";,", &p);
686
                    get_sockaddr(buf, &th->destination);
687
                }
688
            } else if (!strcmp(parameter, "source")) {
689
                if (*p == '=') {
690
                    p++;
691
                    get_word_sep(buf, sizeof(buf), ";,", &p);
692
                    av_strlcpy(th->source, buf, sizeof(th->source));
693
                }
694
            }
695

    
696
            while (*p != ';' && *p != '\0' && *p != ',')
697
                p++;
698
            if (*p == ';')
699
                p++;
700
        }
701
        if (*p == ',')
702
            p++;
703

    
704
        reply->nb_transports++;
705
    }
706
}
707

    
708
static void handle_rtp_info(RTSPState *rt, const char *url,
709
                            uint32_t seq, uint32_t rtptime)
710
{
711
    int i;
712
    if (!rtptime || !url[0])
713
        return;
714
    if (rt->transport != RTSP_TRANSPORT_RTP)
715
        return;
716
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
717
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
718
        RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
719
        if (!rtpctx)
720
            continue;
721
        if (!strcmp(rtsp_st->control_url, url)) {
722
            rtpctx->base_timestamp = rtptime;
723
            break;
724
        }
725
    }
726
}
727

    
728
static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
729
{
730
    int read = 0;
731
    char key[20], value[1024], url[1024] = "";
732
    uint32_t seq = 0, rtptime = 0;
733

    
734
    for (;;) {
735
        p += strspn(p, SPACE_CHARS);
736
        if (!*p)
737
            break;
738
        get_word_sep(key, sizeof(key), "=", &p);
739
        if (*p != '=')
740
            break;
741
        p++;
742
        get_word_sep(value, sizeof(value), ";, ", &p);
743
        read++;
744
        if (!strcmp(key, "url"))
745
            av_strlcpy(url, value, sizeof(url));
746
        else if (!strcmp(key, "seq"))
747
            seq = strtol(value, NULL, 10);
748
        else if (!strcmp(key, "rtptime"))
749
            rtptime = strtol(value, NULL, 10);
750
        if (*p == ',') {
751
            handle_rtp_info(rt, url, seq, rtptime);
752
            url[0] = '\0';
753
            seq = rtptime = 0;
754
            read = 0;
755
        }
756
        if (*p)
757
            p++;
758
    }
759
    if (read > 0)
760
        handle_rtp_info(rt, url, seq, rtptime);
761
}
762

    
763
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
764
                        RTSPState *rt, const char *method)
765
{
766
    const char *p;
767

    
768
    /* NOTE: we do case independent match for broken servers */
769
    p = buf;
770
    if (av_stristart(p, "Session:", &p)) {
771
        int t;
772
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
773
        if (av_stristart(p, ";timeout=", &p) &&
774
            (t = strtol(p, NULL, 10)) > 0) {
775
            reply->timeout = t;
776
        }
777
    } else if (av_stristart(p, "Content-Length:", &p)) {
778
        reply->content_length = strtol(p, NULL, 10);
779
    } else if (av_stristart(p, "Transport:", &p)) {
780
        rtsp_parse_transport(reply, p);
781
    } else if (av_stristart(p, "CSeq:", &p)) {
782
        reply->seq = strtol(p, NULL, 10);
783
    } else if (av_stristart(p, "Range:", &p)) {
784
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
785
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
786
        p += strspn(p, SPACE_CHARS);
787
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
788
    } else if (av_stristart(p, "Server:", &p)) {
789
        p += strspn(p, SPACE_CHARS);
790
        av_strlcpy(reply->server, p, sizeof(reply->server));
791
    } else if (av_stristart(p, "Notice:", &p) ||
792
               av_stristart(p, "X-Notice:", &p)) {
793
        reply->notice = strtol(p, NULL, 10);
794
    } else if (av_stristart(p, "Location:", &p)) {
795
        p += strspn(p, SPACE_CHARS);
796
        av_strlcpy(reply->location, p , sizeof(reply->location));
797
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
798
        p += strspn(p, SPACE_CHARS);
799
        ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
800
    } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
801
        p += strspn(p, SPACE_CHARS);
802
        ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
803
    } else if (av_stristart(p, "Content-Base:", &p) && rt) {
804
        p += strspn(p, SPACE_CHARS);
805
        if (method && !strcmp(method, "DESCRIBE"))
806
            av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
807
    } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
808
        p += strspn(p, SPACE_CHARS);
809
        if (method && !strcmp(method, "PLAY"))
810
            rtsp_parse_rtp_info(rt, p);
811
    }
812
}
813

    
814
/* skip a RTP/TCP interleaved packet */
815
void ff_rtsp_skip_packet(AVFormatContext *s)
816
{
817
    RTSPState *rt = s->priv_data;
818
    int ret, len, len1;
819
    uint8_t buf[1024];
820

    
821
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
822
    if (ret != 3)
823
        return;
824
    len = AV_RB16(buf + 1);
825

    
826
    av_dlog(s, "skipping RTP packet len=%d\n", len);
827

    
828
    /* skip payload */
829
    while (len > 0) {
830
        len1 = len;
831
        if (len1 > sizeof(buf))
832
            len1 = sizeof(buf);
833
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
834
        if (ret != len1)
835
            return;
836
        len -= len1;
837
    }
838
}
839

    
840
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
841
                       unsigned char **content_ptr,
842
                       int return_on_interleaved_data, const char *method)
843
{
844
    RTSPState *rt = s->priv_data;
845
    char buf[4096], buf1[1024], *q;
846
    unsigned char ch;
847
    const char *p;
848
    int ret, content_length, line_count = 0;
849
    unsigned char *content = NULL;
850

    
851
    memset(reply, 0, sizeof(*reply));
852

    
853
    /* parse reply (XXX: use buffers) */
854
    rt->last_reply[0] = '\0';
855
    for (;;) {
856
        q = buf;
857
        for (;;) {
858
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
859
#ifdef DEBUG_RTP_TCP
860
            av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
861
#endif
862
            if (ret != 1)
863
                return AVERROR_EOF;
864
            if (ch == '\n')
865
                break;
866
            if (ch == '$') {
867
                /* XXX: only parse it if first char on line ? */
868
                if (return_on_interleaved_data) {
869
                    return 1;
870
                } else
871
                    ff_rtsp_skip_packet(s);
872
            } else if (ch != '\r') {
873
                if ((q - buf) < sizeof(buf) - 1)
874
                    *q++ = ch;
875
            }
876
        }
877
        *q = '\0';
878

    
879
        av_dlog(s, "line='%s'\n", buf);
880

    
881
        /* test if last line */
882
        if (buf[0] == '\0')
883
            break;
884
        p = buf;
885
        if (line_count == 0) {
886
            /* get reply code */
887
            get_word(buf1, sizeof(buf1), &p);
888
            get_word(buf1, sizeof(buf1), &p);
889
            reply->status_code = atoi(buf1);
890
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
891
        } else {
892
            ff_rtsp_parse_line(reply, p, rt, method);
893
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
894
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
895
        }
896
        line_count++;
897
    }
898

    
899
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
900
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
901

    
902
    content_length = reply->content_length;
903
    if (content_length > 0) {
904
        /* leave some room for a trailing '\0' (useful for simple parsing) */
905
        content = av_malloc(content_length + 1);
906
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
907
        content[content_length] = '\0';
908
    }
909
    if (content_ptr)
910
        *content_ptr = content;
911
    else
912
        av_free(content);
913

    
914
    if (rt->seq != reply->seq) {
915
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
916
            rt->seq, reply->seq);
917
    }
918

    
919
    /* EOS */
920
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
921
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
922
        reply->notice == 2306 /* Continuous Feed Terminated */) {
923
        rt->state = RTSP_STATE_IDLE;
924
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
925
        return AVERROR(EIO); /* data or server error */
926
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
927
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
928
        return AVERROR(EPERM);
929

    
930
    return 0;
931
}
932

    
933
/**
934
 * Send a command to the RTSP server without waiting for the reply.
935
 *
936
 * @param s RTSP (de)muxer context
937
 * @param method the method for the request
938
 * @param url the target url for the request
939
 * @param headers extra header lines to include in the request
940
 * @param send_content if non-null, the data to send as request body content
941
 * @param send_content_length the length of the send_content data, or 0 if
942
 *                            send_content is null
943
 *
944
 * @return zero if success, nonzero otherwise
945
 */
946
static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
947
                                               const char *method, const char *url,
948
                                               const char *headers,
949
                                               const unsigned char *send_content,
950
                                               int send_content_length)
951
{
952
    RTSPState *rt = s->priv_data;
953
    char buf[4096], *out_buf;
954
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
955

    
956
    /* Add in RTSP headers */
957
    out_buf = buf;
958
    rt->seq++;
959
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
960
    if (headers)
961
        av_strlcat(buf, headers, sizeof(buf));
962
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
963
    if (rt->session_id[0] != '\0' && (!headers ||
964
        !strstr(headers, "\nIf-Match:"))) {
965
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
966
    }
967
    if (rt->auth[0]) {
968
        char *str = ff_http_auth_create_response(&rt->auth_state,
969
                                                 rt->auth, url, method);
970
        if (str)
971
            av_strlcat(buf, str, sizeof(buf));
972
        av_free(str);
973
    }
974
    if (send_content_length > 0 && send_content)
975
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
976
    av_strlcat(buf, "\r\n", sizeof(buf));
977

    
978
    /* base64 encode rtsp if tunneling */
979
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
980
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
981
        out_buf = base64buf;
982
    }
983

    
984
    av_dlog(s, "Sending:\n%s--\n", buf);
985

    
986
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
987
    if (send_content_length > 0 && send_content) {
988
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
989
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
990
                                    "with content data not supported\n");
991
            return AVERROR_PATCHWELCOME;
992
        }
993
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
994
    }
995
    rt->last_cmd_time = av_gettime();
996

    
997
    return 0;
998
}
999

    
1000
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1001
                           const char *url, const char *headers)
1002
{
1003
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1004
}
1005

    
1006
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1007
                     const char *headers, RTSPMessageHeader *reply,
1008
                     unsigned char **content_ptr)
1009
{
1010
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1011
                                         content_ptr, NULL, 0);
1012
}
1013

    
1014
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1015
                                  const char *method, const char *url,
1016
                                  const char *header,
1017
                                  RTSPMessageHeader *reply,
1018
                                  unsigned char **content_ptr,
1019
                                  const unsigned char *send_content,
1020
                                  int send_content_length)
1021
{
1022
    RTSPState *rt = s->priv_data;
1023
    HTTPAuthType cur_auth_type;
1024
    int ret;
1025

    
1026
retry:
1027
    cur_auth_type = rt->auth_state.auth_type;
1028
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1029
                                                   send_content,
1030
                                                   send_content_length)))
1031
        return ret;
1032

    
1033
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1034
        return ret;
1035

    
1036
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1037
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
1038
        goto retry;
1039

    
1040
    if (reply->status_code > 400){
1041
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1042
               method,
1043
               reply->status_code,
1044
               reply->reason);
1045
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1046
    }
1047

    
1048
    return 0;
1049
}
1050

    
1051
/**
1052
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1053
 */
1054
int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1055
                              int lower_transport, const char *real_challenge)
1056
{
1057
    RTSPState *rt = s->priv_data;
1058
    int rtx, j, i, err, interleave = 0;
1059
    RTSPStream *rtsp_st;
1060
    RTSPMessageHeader reply1, *reply = &reply1;
1061
    char cmd[2048];
1062
    const char *trans_pref;
1063

    
1064
    if (rt->transport == RTSP_TRANSPORT_RDT)
1065
        trans_pref = "x-pn-tng";
1066
    else
1067
        trans_pref = "RTP/AVP";
1068

    
1069
    /* default timeout: 1 minute */
1070
    rt->timeout = 60;
1071

    
1072
    /* for each stream, make the setup request */
1073
    /* XXX: we assume the same server is used for the control of each
1074
     * RTSP stream */
1075

    
1076
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1077
        char transport[2048];
1078

    
1079
        /**
1080
         * WMS serves all UDP data over a single connection, the RTX, which
1081
         * isn't necessarily the first in the SDP but has to be the first
1082
         * to be set up, else the second/third SETUP will fail with a 461.
1083
         */
1084
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1085
             rt->server_type == RTSP_SERVER_WMS) {
1086
            if (i == 0) {
1087
                /* rtx first */
1088
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1089
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
1090
                    if (len >= 4 &&
1091
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1092
                                "/rtx"))
1093
                        break;
1094
                }
1095
                if (rtx == rt->nb_rtsp_streams)
1096
                    return -1; /* no RTX found */
1097
                rtsp_st = rt->rtsp_streams[rtx];
1098
            } else
1099
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1100
        } else
1101
            rtsp_st = rt->rtsp_streams[i];
1102

    
1103
        /* RTP/UDP */
1104
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1105
            char buf[256];
1106

    
1107
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1108
                port = reply->transports[0].client_port_min;
1109
                goto have_port;
1110
            }
1111

    
1112
            /* first try in specified port range */
1113
            if (RTSP_RTP_PORT_MIN != 0) {
1114
                while (j <= RTSP_RTP_PORT_MAX) {
1115
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1116
                                "?localport=%d", j);
1117
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1118
                    j += 2;
1119
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1120
                        goto rtp_opened;
1121
                }
1122
            }
1123

    
1124
#if 0
1125
            /* then try on any port */
1126
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1127
                err = AVERROR_INVALIDDATA;
1128
                goto fail;
1129
            }
1130
#else
1131
            av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1132
            err = AVERROR(EIO);
1133
            goto fail;
1134
#endif
1135

    
1136
        rtp_opened:
1137
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1138
        have_port:
1139
            snprintf(transport, sizeof(transport) - 1,
1140
                     "%s/UDP;", trans_pref);
1141
            if (rt->server_type != RTSP_SERVER_REAL)
1142
                av_strlcat(transport, "unicast;", sizeof(transport));
1143
            av_strlcatf(transport, sizeof(transport),
1144
                     "client_port=%d", port);
1145
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1146
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1147
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1148
        }
1149

    
1150
        /* RTP/TCP */
1151
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1152
            /** For WMS streams, the application streams are only used for
1153
             * UDP. When trying to set it up for TCP streams, the server
1154
             * will return an error. Therefore, we skip those streams. */
1155
            if (rt->server_type == RTSP_SERVER_WMS &&
1156
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1157
                    AVMEDIA_TYPE_DATA)
1158
                continue;
1159
            snprintf(transport, sizeof(transport) - 1,
1160
                     "%s/TCP;", trans_pref);
1161
            if (rt->server_type == RTSP_SERVER_WMS)
1162
                av_strlcat(transport, "unicast;", sizeof(transport));
1163
            av_strlcatf(transport, sizeof(transport),
1164
                        "interleaved=%d-%d",
1165
                        interleave, interleave + 1);
1166
            interleave += 2;
1167
        }
1168

    
1169
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1170
            snprintf(transport, sizeof(transport) - 1,
1171
                     "%s/UDP;multicast", trans_pref);
1172
        }
1173
        if (s->oformat) {
1174
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1175
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1176
                   rt->server_type == RTSP_SERVER_WMS)
1177
            av_strlcat(transport, ";mode=play", sizeof(transport));
1178
        snprintf(cmd, sizeof(cmd),
1179
                 "Transport: %s\r\n",
1180
                 transport);
1181
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1182
            char real_res[41], real_csum[9];
1183
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1184
                                              real_challenge);
1185
            av_strlcatf(cmd, sizeof(cmd),
1186
                        "If-Match: %s\r\n"
1187
                        "RealChallenge2: %s, sd=%s\r\n",
1188
                        rt->session_id, real_res, real_csum);
1189
        }
1190
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1191
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1192
            err = 1;
1193
            goto fail;
1194
        } else if (reply->status_code != RTSP_STATUS_OK ||
1195
                   reply->nb_transports != 1) {
1196
            err = AVERROR_INVALIDDATA;
1197
            goto fail;
1198
        }
1199

    
1200
        /* XXX: same protocol for all streams is required */
1201
        if (i > 0) {
1202
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1203
                reply->transports[0].transport != rt->transport) {
1204
                err = AVERROR_INVALIDDATA;
1205
                goto fail;
1206
            }
1207
        } else {
1208
            rt->lower_transport = reply->transports[0].lower_transport;
1209
            rt->transport = reply->transports[0].transport;
1210
        }
1211

    
1212
        /* Fail if the server responded with another lower transport mode
1213
         * than what we requested. */
1214
        if (reply->transports[0].lower_transport != lower_transport) {
1215
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1216
            err = AVERROR_INVALIDDATA;
1217
            goto fail;
1218
        }
1219

    
1220
        switch(reply->transports[0].lower_transport) {
1221
        case RTSP_LOWER_TRANSPORT_TCP:
1222
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1223
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1224
            break;
1225

    
1226
        case RTSP_LOWER_TRANSPORT_UDP: {
1227
            char url[1024], options[30] = "";
1228

    
1229
            if (rt->filter_source)
1230
                av_strlcpy(options, "?connect=1", sizeof(options));
1231
            /* Use source address if specified */
1232
            if (reply->transports[0].source[0]) {
1233
                ff_url_join(url, sizeof(url), "rtp", NULL,
1234
                            reply->transports[0].source,
1235
                            reply->transports[0].server_port_min, options);
1236
            } else {
1237
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1238
                            reply->transports[0].server_port_min, options);
1239
            }
1240
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1241
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1242
                err = AVERROR_INVALIDDATA;
1243
                goto fail;
1244
            }
1245
            /* Try to initialize the connection state in a
1246
             * potential NAT router by sending dummy packets.
1247
             * RTP/RTCP dummy packets are used for RDT, too.
1248
             */
1249
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1250
                CONFIG_RTPDEC)
1251
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1252
            break;
1253
        }
1254
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1255
            char url[1024], namebuf[50];
1256
            struct sockaddr_storage addr;
1257
            int port, ttl;
1258

    
1259
            if (reply->transports[0].destination.ss_family) {
1260
                addr      = reply->transports[0].destination;
1261
                port      = reply->transports[0].port_min;
1262
                ttl       = reply->transports[0].ttl;
1263
            } else {
1264
                addr      = rtsp_st->sdp_ip;
1265
                port      = rtsp_st->sdp_port;
1266
                ttl       = rtsp_st->sdp_ttl;
1267
            }
1268
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1269
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1270
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1271
                        port, "?ttl=%d", ttl);
1272
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1273
                err = AVERROR_INVALIDDATA;
1274
                goto fail;
1275
            }
1276
            break;
1277
        }
1278
        }
1279

    
1280
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1281
            goto fail;
1282
    }
1283

    
1284
    if (reply->timeout > 0)
1285
        rt->timeout = reply->timeout;
1286

    
1287
    if (rt->server_type == RTSP_SERVER_REAL)
1288
        rt->need_subscription = 1;
1289

    
1290
    return 0;
1291

    
1292
fail:
1293
    ff_rtsp_undo_setup(s);
1294
    return err;
1295
}
1296

    
1297
void ff_rtsp_close_connections(AVFormatContext *s)
1298
{
1299
    RTSPState *rt = s->priv_data;
1300
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1301
    url_close(rt->rtsp_hd);
1302
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1303
}
1304

    
1305
int ff_rtsp_connect(AVFormatContext *s)
1306
{
1307
    RTSPState *rt = s->priv_data;
1308
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1309
    char *option_list, *option, *filename;
1310
    int port, err, tcp_fd;
1311
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1312
    int lower_transport_mask = 0;
1313
    char real_challenge[64] = "";
1314
    struct sockaddr_storage peer;
1315
    socklen_t peer_len = sizeof(peer);
1316

    
1317
    if (!ff_network_init())
1318
        return AVERROR(EIO);
1319
redirect:
1320
    rt->control_transport = RTSP_MODE_PLAIN;
1321
    /* extract hostname and port */
1322
    av_url_split(NULL, 0, auth, sizeof(auth),
1323
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1324
    if (*auth) {
1325
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1326
    }
1327
    if (port < 0)
1328
        port = RTSP_DEFAULT_PORT;
1329

    
1330
    /* search for options */
1331
    option_list = strrchr(path, '?');
1332
    if (option_list) {
1333
        /* Strip out the RTSP specific options, write out the rest of
1334
         * the options back into the same string. */
1335
        filename = option_list;
1336
        while (option_list) {
1337
            /* move the option pointer */
1338
            option = ++option_list;
1339
            option_list = strchr(option_list, '&');
1340
            if (option_list)
1341
                *option_list = 0;
1342

    
1343
            /* handle the options */
1344
            if (!strcmp(option, "udp")) {
1345
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1346
            } else if (!strcmp(option, "multicast")) {
1347
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1348
            } else if (!strcmp(option, "tcp")) {
1349
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1350
            } else if(!strcmp(option, "http")) {
1351
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1352
                rt->control_transport = RTSP_MODE_TUNNEL;
1353
            } else if (!strcmp(option, "filter_src")) {
1354
                rt->filter_source = 1;
1355
            } else {
1356
                /* Write options back into the buffer, using memmove instead
1357
                 * of strcpy since the strings may overlap. */
1358
                int len = strlen(option);
1359
                memmove(++filename, option, len);
1360
                filename += len;
1361
                if (option_list) *filename = '&';
1362
            }
1363
        }
1364
        *filename = 0;
1365
    }
1366

    
1367
    if (!lower_transport_mask)
1368
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1369

    
1370
    if (s->oformat) {
1371
        /* Only UDP or TCP - UDP multicast isn't supported. */
1372
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1373
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1374
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1375
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1376
                                    "only UDP and TCP are supported for output.\n");
1377
            err = AVERROR(EINVAL);
1378
            goto fail;
1379
        }
1380
    }
1381

    
1382
    /* Construct the URI used in request; this is similar to s->filename,
1383
     * but with authentication credentials removed and RTSP specific options
1384
     * stripped out. */
1385
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1386
                host, port, "%s", path);
1387

    
1388
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1389
        /* set up initial handshake for tunneling */
1390
        char httpname[1024];
1391
        char sessioncookie[17];
1392
        char headers[1024];
1393

    
1394
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1395
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1396
                 av_get_random_seed(), av_get_random_seed());
1397

    
1398
        /* GET requests */
1399
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1400
            err = AVERROR(EIO);
1401
            goto fail;
1402
        }
1403

    
1404
        /* generate GET headers */
1405
        snprintf(headers, sizeof(headers),
1406
                 "x-sessioncookie: %s\r\n"
1407
                 "Accept: application/x-rtsp-tunnelled\r\n"
1408
                 "Pragma: no-cache\r\n"
1409
                 "Cache-Control: no-cache\r\n",
1410
                 sessioncookie);
1411
        ff_http_set_headers(rt->rtsp_hd, headers);
1412

    
1413
        /* complete the connection */
1414
        if (url_connect(rt->rtsp_hd)) {
1415
            err = AVERROR(EIO);
1416
            goto fail;
1417
        }
1418

    
1419
        /* POST requests */
1420
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1421
            err = AVERROR(EIO);
1422
            goto fail;
1423
        }
1424

    
1425
        /* generate POST headers */
1426
        snprintf(headers, sizeof(headers),
1427
                 "x-sessioncookie: %s\r\n"
1428
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1429
                 "Pragma: no-cache\r\n"
1430
                 "Cache-Control: no-cache\r\n"
1431
                 "Content-Length: 32767\r\n"
1432
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1433
                 sessioncookie);
1434
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1435
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1436

    
1437
        /* Initialize the authentication state for the POST session. The HTTP
1438
         * protocol implementation doesn't properly handle multi-pass
1439
         * authentication for POST requests, since it would require one of
1440
         * the following:
1441
         * - implementing Expect: 100-continue, which many HTTP servers
1442
         *   don't support anyway, even less the RTSP servers that do HTTP
1443
         *   tunneling
1444
         * - sending the whole POST data until getting a 401 reply specifying
1445
         *   what authentication method to use, then resending all that data
1446
         * - waiting for potential 401 replies directly after sending the
1447
         *   POST header (waiting for some unspecified time)
1448
         * Therefore, we copy the full auth state, which works for both basic
1449
         * and digest. (For digest, we would have to synchronize the nonce
1450
         * count variable between the two sessions, if we'd do more requests
1451
         * with the original session, though.)
1452
         */
1453
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1454

    
1455
        /* complete the connection */
1456
        if (url_connect(rt->rtsp_hd_out)) {
1457
            err = AVERROR(EIO);
1458
            goto fail;
1459
        }
1460
    } else {
1461
        /* open the tcp connection */
1462
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1463
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1464
            err = AVERROR(EIO);
1465
            goto fail;
1466
        }
1467
        rt->rtsp_hd_out = rt->rtsp_hd;
1468
    }
1469
    rt->seq = 0;
1470

    
1471
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1472
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1473
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1474
                    NULL, 0, NI_NUMERICHOST);
1475
    }
1476

    
1477
    /* request options supported by the server; this also detects server
1478
     * type */
1479
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1480
        cmd[0] = 0;
1481
        if (rt->server_type == RTSP_SERVER_REAL)
1482
            av_strlcat(cmd,
1483
                       /**
1484
                        * The following entries are required for proper
1485
                        * streaming from a Realmedia server. They are
1486
                        * interdependent in some way although we currently
1487
                        * don't quite understand how. Values were copied
1488
                        * from mplayer SVN r23589.
1489
                        * @param CompanyID is a 16-byte ID in base64
1490
                        * @param ClientChallenge is a 16-byte ID in hex
1491
                        */
1492
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1493
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1494
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1495
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1496
                       sizeof(cmd));
1497
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1498
        if (reply->status_code != RTSP_STATUS_OK) {
1499
            err = AVERROR_INVALIDDATA;
1500
            goto fail;
1501
        }
1502

    
1503
        /* detect server type if not standard-compliant RTP */
1504
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1505
            rt->server_type = RTSP_SERVER_REAL;
1506
            continue;
1507
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1508
            rt->server_type = RTSP_SERVER_WMS;
1509
        } else if (rt->server_type == RTSP_SERVER_REAL)
1510
            strcpy(real_challenge, reply->real_challenge);
1511
        break;
1512
    }
1513

    
1514
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1515
        err = ff_rtsp_setup_input_streams(s, reply);
1516
    else if (CONFIG_RTSP_MUXER)
1517
        err = ff_rtsp_setup_output_streams(s, host);
1518
    if (err)
1519
        goto fail;
1520

    
1521
    do {
1522
        int lower_transport = ff_log2_tab[lower_transport_mask &
1523
                                  ~(lower_transport_mask - 1)];
1524

    
1525
        err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1526
                                 rt->server_type == RTSP_SERVER_REAL ?
1527
                                     real_challenge : NULL);
1528
        if (err < 0)
1529
            goto fail;
1530
        lower_transport_mask &= ~(1 << lower_transport);
1531
        if (lower_transport_mask == 0 && err == 1) {
1532
            err = FF_NETERROR(EPROTONOSUPPORT);
1533
            goto fail;
1534
        }
1535
    } while (err);
1536

    
1537
    rt->lower_transport_mask = lower_transport_mask;
1538
    av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1539
    rt->state = RTSP_STATE_IDLE;
1540
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1541
    return 0;
1542
 fail:
1543
    ff_rtsp_close_streams(s);
1544
    ff_rtsp_close_connections(s);
1545
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1546
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1547
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1548
               reply->status_code,
1549
               s->filename);
1550
        goto redirect;
1551
    }
1552
    ff_network_close();
1553
    return err;
1554
}
1555
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1556

    
1557
#if CONFIG_RTPDEC
1558
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1559
                           uint8_t *buf, int buf_size, int64_t wait_end)
1560
{
1561
    RTSPState *rt = s->priv_data;
1562
    RTSPStream *rtsp_st;
1563
    int n, i, ret, tcp_fd, timeout_cnt = 0;
1564
    int max_p = 0;
1565
    struct pollfd *p = rt->p;
1566

    
1567
    for (;;) {
1568
        if (url_interrupt_cb())
1569
            return AVERROR(EINTR);
1570
        if (wait_end && wait_end - av_gettime() < 0)
1571
            return AVERROR(EAGAIN);
1572
        max_p = 0;
1573
        if (rt->rtsp_hd) {
1574
            tcp_fd = url_get_file_handle(rt->rtsp_hd);
1575
            p[max_p].fd = tcp_fd;
1576
            p[max_p++].events = POLLIN;
1577
        } else {
1578
            tcp_fd = -1;
1579
        }
1580
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1581
            rtsp_st = rt->rtsp_streams[i];
1582
            if (rtsp_st->rtp_handle) {
1583
                p[max_p].fd = url_get_file_handle(rtsp_st->rtp_handle);
1584
                p[max_p++].events = POLLIN;
1585
                p[max_p].fd = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1586
                p[max_p++].events = POLLIN;
1587
            }
1588
        }
1589
        n = poll(p, max_p, POLL_TIMEOUT_MS);
1590
        if (n > 0) {
1591
            int j = 1 - (tcp_fd == -1);
1592
            timeout_cnt = 0;
1593
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1594
                rtsp_st = rt->rtsp_streams[i];
1595
                if (rtsp_st->rtp_handle) {
1596
                    if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1597
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1598
                        if (ret > 0) {
1599
                            *prtsp_st = rtsp_st;
1600
                            return ret;
1601
                        }
1602
                    }
1603
                    j+=2;
1604
                }
1605
            }
1606
#if CONFIG_RTSP_DEMUXER
1607
            if (tcp_fd != -1 && p[0].revents & POLLIN) {
1608
                RTSPMessageHeader reply;
1609

    
1610
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1611
                if (ret < 0)
1612
                    return ret;
1613
                /* XXX: parse message */
1614
                if (rt->state != RTSP_STATE_STREAMING)
1615
                    return 0;
1616
            }
1617
#endif
1618
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1619
            return FF_NETERROR(ETIMEDOUT);
1620
        } else if (n < 0 && errno != EINTR)
1621
            return AVERROR(errno);
1622
    }
1623
}
1624

    
1625
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1626
{
1627
    RTSPState *rt = s->priv_data;
1628
    int ret, len;
1629
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1630
    int64_t wait_end = 0;
1631

    
1632
    if (rt->nb_byes == rt->nb_rtsp_streams)
1633
        return AVERROR_EOF;
1634

    
1635
    /* get next frames from the same RTP packet */
1636
    if (rt->cur_transport_priv) {
1637
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1638
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1639
        } else
1640
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1641
        if (ret == 0) {
1642
            rt->cur_transport_priv = NULL;
1643
            return 0;
1644
        } else if (ret == 1) {
1645
            return 0;
1646
        } else
1647
            rt->cur_transport_priv = NULL;
1648
    }
1649

    
1650
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1651
        int i;
1652
        int64_t first_queue_time = 0;
1653
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1654
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1655
            int64_t queue_time;
1656
            if (!rtpctx)
1657
                continue;
1658
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1659
            if (queue_time && (queue_time - first_queue_time < 0 ||
1660
                               !first_queue_time)) {
1661
                first_queue_time = queue_time;
1662
                first_queue_st   = rt->rtsp_streams[i];
1663
            }
1664
        }
1665
        if (first_queue_time)
1666
            wait_end = first_queue_time + s->max_delay;
1667
    }
1668

    
1669
    /* read next RTP packet */
1670
 redo:
1671
    if (!rt->recvbuf) {
1672
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1673
        if (!rt->recvbuf)
1674
            return AVERROR(ENOMEM);
1675
    }
1676

    
1677
    switch(rt->lower_transport) {
1678
    default:
1679
#if CONFIG_RTSP_DEMUXER
1680
    case RTSP_LOWER_TRANSPORT_TCP:
1681
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1682
        break;
1683
#endif
1684
    case RTSP_LOWER_TRANSPORT_UDP:
1685
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1686
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1687
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1688
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1689
        break;
1690
    }
1691
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1692
        rt->transport == RTSP_TRANSPORT_RTP) {
1693
        rtsp_st = first_queue_st;
1694
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1695
        goto end;
1696
    }
1697
    if (len < 0)
1698
        return len;
1699
    if (len == 0)
1700
        return AVERROR_EOF;
1701
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1702
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1703
    } else {
1704
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1705
        if (ret < 0) {
1706
            /* Either bad packet, or a RTCP packet. Check if the
1707
             * first_rtcp_ntp_time field was initialized. */
1708
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1709
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1710
                /* first_rtcp_ntp_time has been initialized for this stream,
1711
                 * copy the same value to all other uninitialized streams,
1712
                 * in order to map their timestamp origin to the same ntp time
1713
                 * as this one. */
1714
                int i;
1715
                AVStream *st = NULL;
1716
                if (rtsp_st->stream_index >= 0)
1717
                    st = s->streams[rtsp_st->stream_index];
1718
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1719
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1720
                    AVStream *st2 = NULL;
1721
                    if (rt->rtsp_streams[i]->stream_index >= 0)
1722
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1723
                    if (rtpctx2 && st && st2 &&
1724
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1725
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1726
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
1727
                            rtpctx->rtcp_ts_offset, st->time_base,
1728
                            st2->time_base);
1729
                    }
1730
                }
1731
            }
1732
            if (ret == -RTCP_BYE) {
1733
                rt->nb_byes++;
1734

    
1735
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1736
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1737

    
1738
                if (rt->nb_byes == rt->nb_rtsp_streams)
1739
                    return AVERROR_EOF;
1740
            }
1741
        }
1742
    }
1743
end:
1744
    if (ret < 0)
1745
        goto redo;
1746
    if (ret == 1)
1747
        /* more packets may follow, so we save the RTP context */
1748
        rt->cur_transport_priv = rtsp_st->transport_priv;
1749

    
1750
    return ret;
1751
}
1752
#endif /* CONFIG_RTPDEC */
1753

    
1754
#if CONFIG_SDP_DEMUXER
1755
static int sdp_probe(AVProbeData *p1)
1756
{
1757
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1758

    
1759
    /* we look for a line beginning "c=IN IP" */
1760
    while (p < p_end && *p != '\0') {
1761
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1762
            av_strstart(p, "c=IN IP", NULL))
1763
            return AVPROBE_SCORE_MAX / 2;
1764

    
1765
        while (p < p_end - 1 && *p != '\n') p++;
1766
        if (++p >= p_end)
1767
            break;
1768
        if (*p == '\r')
1769
            p++;
1770
    }
1771
    return 0;
1772
}
1773

    
1774
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1775
{
1776
    RTSPState *rt = s->priv_data;
1777
    RTSPStream *rtsp_st;
1778
    int size, i, err;
1779
    char *content;
1780
    char url[1024];
1781

    
1782
    if (!ff_network_init())
1783
        return AVERROR(EIO);
1784

    
1785
    /* read the whole sdp file */
1786
    /* XXX: better loading */
1787
    content = av_malloc(SDP_MAX_SIZE);
1788
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1789
    if (size <= 0) {
1790
        av_free(content);
1791
        return AVERROR_INVALIDDATA;
1792
    }
1793
    content[size] ='\0';
1794

    
1795
    err = ff_sdp_parse(s, content);
1796
    av_free(content);
1797
    if (err) goto fail;
1798

    
1799
    /* open each RTP stream */
1800
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1801
        char namebuf[50];
1802
        rtsp_st = rt->rtsp_streams[i];
1803

    
1804
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1805
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1806
        ff_url_join(url, sizeof(url), "rtp", NULL,
1807
                    namebuf, rtsp_st->sdp_port,
1808
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1809
                    rtsp_st->sdp_ttl);
1810
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1811
            err = AVERROR_INVALIDDATA;
1812
            goto fail;
1813
        }
1814
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1815
            goto fail;
1816
    }
1817
    return 0;
1818
fail:
1819
    ff_rtsp_close_streams(s);
1820
    ff_network_close();
1821
    return err;
1822
}
1823

    
1824
static int sdp_read_close(AVFormatContext *s)
1825
{
1826
    ff_rtsp_close_streams(s);
1827
    ff_network_close();
1828
    return 0;
1829
}
1830

    
1831
AVInputFormat ff_sdp_demuxer = {
1832
    "sdp",
1833
    NULL_IF_CONFIG_SMALL("SDP"),
1834
    sizeof(RTSPState),
1835
    sdp_probe,
1836
    sdp_read_header,
1837
    ff_rtsp_fetch_packet,
1838
    sdp_read_close,
1839
};
1840
#endif /* CONFIG_SDP_DEMUXER */
1841

    
1842
#if CONFIG_RTP_DEMUXER
1843
static int rtp_probe(AVProbeData *p)
1844
{
1845
    if (av_strstart(p->filename, "rtp:", NULL))
1846
        return AVPROBE_SCORE_MAX;
1847
    return 0;
1848
}
1849

    
1850
static int rtp_read_header(AVFormatContext *s,
1851
                           AVFormatParameters *ap)
1852
{
1853
    uint8_t recvbuf[1500];
1854
    char host[500], sdp[500];
1855
    int ret, port;
1856
    URLContext* in = NULL;
1857
    int payload_type;
1858
    AVCodecContext codec;
1859
    struct sockaddr_storage addr;
1860
    ByteIOContext pb;
1861
    socklen_t addrlen = sizeof(addr);
1862

    
1863
    if (!ff_network_init())
1864
        return AVERROR(EIO);
1865

    
1866
    ret = url_open(&in, s->filename, URL_RDONLY);
1867
    if (ret)
1868
        goto fail;
1869

    
1870
    while (1) {
1871
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1872
        if (ret == AVERROR(EAGAIN))
1873
            continue;
1874
        if (ret < 0)
1875
            goto fail;
1876
        if (ret < 12) {
1877
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1878
            continue;
1879
        }
1880

    
1881
        if ((recvbuf[0] & 0xc0) != 0x80) {
1882
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1883
                                      "received\n");
1884
            continue;
1885
        }
1886

    
1887
        payload_type = recvbuf[1] & 0x7f;
1888
        break;
1889
    }
1890
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1891
    url_close(in);
1892
    in = NULL;
1893

    
1894
    memset(&codec, 0, sizeof(codec));
1895
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1896
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1897
                                "without an SDP file describing it\n",
1898
                                 payload_type);
1899
        goto fail;
1900
    }
1901
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1902
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1903
                                  "properly you need an SDP file "
1904
                                  "describing it\n");
1905
    }
1906

    
1907
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1908
                 NULL, 0, s->filename);
1909

    
1910
    snprintf(sdp, sizeof(sdp),
1911
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1912
             addr.ss_family == AF_INET ? 4 : 6, host,
1913
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1914
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1915
             port, payload_type);
1916
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1917

    
1918
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1919
    s->pb = &pb;
1920

    
1921
    /* sdp_read_header initializes this again */
1922
    ff_network_close();
1923

    
1924
    ret = sdp_read_header(s, ap);
1925
    s->pb = NULL;
1926
    return ret;
1927

    
1928
fail:
1929
    if (in)
1930
        url_close(in);
1931
    ff_network_close();
1932
    return ret;
1933
}
1934

    
1935
AVInputFormat ff_rtp_demuxer = {
1936
    "rtp",
1937
    NULL_IF_CONFIG_SMALL("RTP input format"),
1938
    sizeof(RTSPState),
1939
    rtp_probe,
1940
    rtp_read_header,
1941
    ff_rtsp_fetch_packet,
1942
    sdp_read_close,
1943
    .flags = AVFMT_NOFILE,
1944
};
1945
#endif /* CONFIG_RTP_DEMUXER */
1946