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ffmpeg / libavformat / rtsp.c @ bb776f3b

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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.
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 *
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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>
29
#if HAVE_SYS_SELECT_H
30
#include <sys/select.h>
31
#endif
32
#include <strings.h>
33
#include "internal.h"
34
#include "network.h"
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#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 select, in ms,
48
 * and read_packet(), in seconds  */
49
#define SELECT_TIMEOUT_MS 100
50
#define READ_PACKET_TIMEOUT_S 10
51
#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / SELECT_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
                            AVCodecContext *codec, RTSPStream *rtsp_st,
139
                            int payload_type, const char *p)
140
{
141
    char buf[256];
142
    int i;
143
    AVCodec *c;
144
    const char *c_name;
145

    
146
    /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
147
     * see if we can handle this kind of payload.
148
     * The space should normally not be there but some Real streams or
149
     * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
150
     * have a trailing space. */
151
    get_word_sep(buf, sizeof(buf), "/ ", &p);
152
    if (payload_type >= RTP_PT_PRIVATE) {
153
        RTPDynamicProtocolHandler *handler =
154
            ff_rtp_handler_find_by_name(buf, codec->codec_type);
155
        init_rtp_handler(handler, rtsp_st, codec);
156
        /* If no dynamic handler was found, check with the list of standard
157
         * allocated types, if such a stream for some reason happens to
158
         * use a private payload type. This isn't handled in rtpdec.c, since
159
         * the format name from the rtpmap line never is passed into rtpdec. */
160
        if (!rtsp_st->dynamic_handler)
161
            codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
162
    } else {
163
        /* We are in a standard case
164
         * (from http://www.iana.org/assignments/rtp-parameters). */
165
        /* search into AVRtpPayloadTypes[] */
166
        codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
167
    }
168

    
169
    c = avcodec_find_decoder(codec->codec_id);
170
    if (c && c->name)
171
        c_name = c->name;
172
    else
173
        c_name = "(null)";
174

    
175
    get_word_sep(buf, sizeof(buf), "/", &p);
176
    i = atoi(buf);
177
    switch (codec->codec_type) {
178
    case AVMEDIA_TYPE_AUDIO:
179
        av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
180
        codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
181
        codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
182
        if (i > 0) {
183
            codec->sample_rate = i;
184
            get_word_sep(buf, sizeof(buf), "/", &p);
185
            i = atoi(buf);
186
            if (i > 0)
187
                codec->channels = i;
188
            // TODO: there is a bug here; if it is a mono stream, and
189
            // less than 22000Hz, faad upconverts to stereo and twice
190
            // the frequency.  No problem, but the sample rate is being
191
            // set here by the sdp line. Patch on its way. (rdm)
192
        }
193
        av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
194
               codec->sample_rate);
195
        av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
196
               codec->channels);
197
        break;
198
    case AVMEDIA_TYPE_VIDEO:
199
        av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
200
        break;
201
    default:
202
        break;
203
    }
204
    return 0;
205
}
206

    
207
/* parse the attribute line from the fmtp a line of an sdp response. This
208
 * is broken out as a function because it is used in rtp_h264.c, which is
209
 * forthcoming. */
210
int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
211
                                char *value, int value_size)
212
{
213
    *p += strspn(*p, SPACE_CHARS);
214
    if (**p) {
215
        get_word_sep(attr, attr_size, "=", p);
216
        if (**p == '=')
217
            (*p)++;
218
        get_word_sep(value, value_size, ";", p);
219
        if (**p == ';')
220
            (*p)++;
221
        return 1;
222
    }
223
    return 0;
224
}
225

    
226
typedef struct SDPParseState {
227
    /* SDP only */
228
    struct sockaddr_storage default_ip;
229
    int            default_ttl;
230
    int            skip_media;  ///< set if an unknown m= line occurs
231
} SDPParseState;
232

    
233
static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
234
                           int letter, const char *buf)
235
{
236
    RTSPState *rt = s->priv_data;
237
    char buf1[64], st_type[64];
238
    const char *p;
239
    enum AVMediaType codec_type;
240
    int payload_type, i;
241
    AVStream *st;
242
    RTSPStream *rtsp_st;
243
    struct sockaddr_storage sdp_ip;
244
    int ttl;
245

    
246
    dprintf(s, "sdp: %c='%s'\n", letter, buf);
247

    
248
    p = buf;
249
    if (s1->skip_media && letter != 'm')
250
        return;
251
    switch (letter) {
252
    case 'c':
253
        get_word(buf1, sizeof(buf1), &p);
254
        if (strcmp(buf1, "IN") != 0)
255
            return;
256
        get_word(buf1, sizeof(buf1), &p);
257
        if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
258
            return;
259
        get_word_sep(buf1, sizeof(buf1), "/", &p);
260
        if (get_sockaddr(buf1, &sdp_ip))
261
            return;
262
        ttl = 16;
263
        if (*p == '/') {
264
            p++;
265
            get_word_sep(buf1, sizeof(buf1), "/", &p);
266
            ttl = atoi(buf1);
267
        }
268
        if (s->nb_streams == 0) {
269
            s1->default_ip = sdp_ip;
270
            s1->default_ttl = ttl;
271
        } else {
272
            st = s->streams[s->nb_streams - 1];
273
            rtsp_st = st->priv_data;
274
            rtsp_st->sdp_ip = sdp_ip;
275
            rtsp_st->sdp_ttl = ttl;
276
        }
277
        break;
278
    case 's':
279
        av_metadata_set2(&s->metadata, "title", p, 0);
280
        break;
281
    case 'i':
282
        if (s->nb_streams == 0) {
283
            av_metadata_set2(&s->metadata, "comment", p, 0);
284
            break;
285
        }
286
        break;
287
    case 'm':
288
        /* new stream */
289
        s1->skip_media = 0;
290
        get_word(st_type, sizeof(st_type), &p);
291
        if (!strcmp(st_type, "audio")) {
292
            codec_type = AVMEDIA_TYPE_AUDIO;
293
        } else if (!strcmp(st_type, "video")) {
294
            codec_type = AVMEDIA_TYPE_VIDEO;
295
        } else if (!strcmp(st_type, "application")) {
296
            codec_type = AVMEDIA_TYPE_DATA;
297
        } else {
298
            s1->skip_media = 1;
299
            return;
300
        }
301
        rtsp_st = av_mallocz(sizeof(RTSPStream));
302
        if (!rtsp_st)
303
            return;
304
        rtsp_st->stream_index = -1;
305
        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
306

    
307
        rtsp_st->sdp_ip = s1->default_ip;
308
        rtsp_st->sdp_ttl = s1->default_ttl;
309

    
310
        get_word(buf1, sizeof(buf1), &p); /* port */
311
        rtsp_st->sdp_port = atoi(buf1);
312

    
313
        get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
314

    
315
        /* XXX: handle list of formats */
316
        get_word(buf1, sizeof(buf1), &p); /* format list */
317
        rtsp_st->sdp_payload_type = atoi(buf1);
318

    
319
        if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
320
            /* no corresponding stream */
321
        } else {
322
            st = av_new_stream(s, 0);
323
            if (!st)
324
                return;
325
            st->priv_data = rtsp_st;
326
            rtsp_st->stream_index = st->index;
327
            st->codec->codec_type = codec_type;
328
            if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
329
                RTPDynamicProtocolHandler *handler;
330
                /* if standard payload type, we can find the codec right now */
331
                ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
332
                /* Even static payload types may need a custom depacketizer */
333
                handler = ff_rtp_handler_find_by_id(
334
                              rtsp_st->sdp_payload_type, st->codec->codec_type);
335
                init_rtp_handler(handler, rtsp_st, st->codec);
336
            }
337
        }
338
        /* put a default control url */
339
        av_strlcpy(rtsp_st->control_url, rt->control_uri,
340
                   sizeof(rtsp_st->control_url));
341
        break;
342
    case 'a':
343
        if (av_strstart(p, "control:", &p)) {
344
            if (s->nb_streams == 0) {
345
                if (!strncmp(p, "rtsp://", 7))
346
                    av_strlcpy(rt->control_uri, p,
347
                               sizeof(rt->control_uri));
348
            } else {
349
                char proto[32];
350
                /* get the control url */
351
                st = s->streams[s->nb_streams - 1];
352
                rtsp_st = st->priv_data;
353

    
354
                /* XXX: may need to add full url resolution */
355
                av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
356
                             NULL, NULL, 0, p);
357
                if (proto[0] == '\0') {
358
                    /* relative control URL */
359
                    if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
360
                    av_strlcat(rtsp_st->control_url, "/",
361
                               sizeof(rtsp_st->control_url));
362
                    av_strlcat(rtsp_st->control_url, p,
363
                               sizeof(rtsp_st->control_url));
364
                } else
365
                    av_strlcpy(rtsp_st->control_url, p,
366
                               sizeof(rtsp_st->control_url));
367
            }
368
        } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
369
            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
370
            get_word(buf1, sizeof(buf1), &p);
371
            payload_type = atoi(buf1);
372
            st = s->streams[s->nb_streams - 1];
373
            rtsp_st = st->priv_data;
374
            sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
375
        } else if (av_strstart(p, "fmtp:", &p) ||
376
                   av_strstart(p, "framesize:", &p)) {
377
            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
378
            // let dynamic protocol handlers have a stab at the line.
379
            get_word(buf1, sizeof(buf1), &p);
380
            payload_type = atoi(buf1);
381
            for (i = 0; i < s->nb_streams; i++) {
382
                st      = s->streams[i];
383
                rtsp_st = st->priv_data;
384
                if (rtsp_st->sdp_payload_type == payload_type &&
385
                    rtsp_st->dynamic_handler &&
386
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
387
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
388
                        rtsp_st->dynamic_protocol_context, buf);
389
            }
390
        } else if (av_strstart(p, "range:", &p)) {
391
            int64_t start, end;
392

    
393
            // this is so that seeking on a streamed file can work.
394
            rtsp_parse_range_npt(p, &start, &end);
395
            s->start_time = start;
396
            /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
397
            s->duration   = (end == AV_NOPTS_VALUE) ?
398
                            AV_NOPTS_VALUE : end - start;
399
        } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
400
            if (atoi(p) == 1)
401
                rt->transport = RTSP_TRANSPORT_RDT;
402
        } else if (av_strstart(p, "SampleRate:integer;", &p) &&
403
                   s->nb_streams > 0) {
404
            st = s->streams[s->nb_streams - 1];
405
            st->codec->sample_rate = atoi(p);
406
        } else {
407
            if (rt->server_type == RTSP_SERVER_WMS)
408
                ff_wms_parse_sdp_a_line(s, p);
409
            if (s->nb_streams > 0) {
410
                if (rt->server_type == RTSP_SERVER_REAL)
411
                    ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
412

    
413
                rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
414
                if (rtsp_st->dynamic_handler &&
415
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
416
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s,
417
                        s->nb_streams - 1,
418
                        rtsp_st->dynamic_protocol_context, buf);
419
            }
420
        }
421
        break;
422
    }
423
}
424

    
425
int ff_sdp_parse(AVFormatContext *s, const char *content)
426
{
427
    const char *p;
428
    int letter;
429
    /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
430
     * contain long SDP lines containing complete ASF Headers (several
431
     * kB) or arrays of MDPR (RM stream descriptor) headers plus
432
     * "rulebooks" describing their properties. Therefore, the SDP line
433
     * buffer is large.
434
     *
435
     * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
436
     * in rtpdec_xiph.c. */
437
    char buf[16384], *q;
438
    SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
439

    
440
    memset(s1, 0, sizeof(SDPParseState));
441
    p = content;
442
    for (;;) {
443
        p += strspn(p, SPACE_CHARS);
444
        letter = *p;
445
        if (letter == '\0')
446
            break;
447
        p++;
448
        if (*p != '=')
449
            goto next_line;
450
        p++;
451
        /* get the content */
452
        q = buf;
453
        while (*p != '\n' && *p != '\r' && *p != '\0') {
454
            if ((q - buf) < sizeof(buf) - 1)
455
                *q++ = *p;
456
            p++;
457
        }
458
        *q = '\0';
459
        sdp_parse_line(s, s1, letter, buf);
460
    next_line:
461
        while (*p != '\n' && *p != '\0')
462
            p++;
463
        if (*p == '\n')
464
            p++;
465
    }
466
    return 0;
467
}
468
#endif /* CONFIG_RTPDEC */
469

    
470
/* close and free RTSP streams */
471
void ff_rtsp_close_streams(AVFormatContext *s)
472
{
473
    RTSPState *rt = s->priv_data;
474
    int i;
475
    RTSPStream *rtsp_st;
476

    
477
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
478
        rtsp_st = rt->rtsp_streams[i];
479
        if (rtsp_st) {
480
            if (rtsp_st->transport_priv) {
481
                if (s->oformat) {
482
                    AVFormatContext *rtpctx = rtsp_st->transport_priv;
483
                    av_write_trailer(rtpctx);
484
                    if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
485
                        uint8_t *ptr;
486
                        url_close_dyn_buf(rtpctx->pb, &ptr);
487
                        av_free(ptr);
488
                    } else {
489
                        url_fclose(rtpctx->pb);
490
                    }
491
                    av_metadata_free(&rtpctx->streams[0]->metadata);
492
                    av_metadata_free(&rtpctx->metadata);
493
                    av_free(rtpctx->streams[0]);
494
                    av_free(rtpctx);
495
                } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
496
                    ff_rdt_parse_close(rtsp_st->transport_priv);
497
                else if (CONFIG_RTPDEC)
498
                    rtp_parse_close(rtsp_st->transport_priv);
499
            }
500
            if (rtsp_st->rtp_handle)
501
                url_close(rtsp_st->rtp_handle);
502
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
503
                rtsp_st->dynamic_handler->close(
504
                    rtsp_st->dynamic_protocol_context);
505
        }
506
    }
507
    av_free(rt->rtsp_streams);
508
    if (rt->asf_ctx) {
509
        av_close_input_stream (rt->asf_ctx);
510
        rt->asf_ctx = NULL;
511
    }
512
    av_free(rt->recvbuf);
513
}
514

    
515
static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
516
{
517
    RTSPState *rt = s->priv_data;
518
    AVStream *st = NULL;
519

    
520
    /* open the RTP context */
521
    if (rtsp_st->stream_index >= 0)
522
        st = s->streams[rtsp_st->stream_index];
523
    if (!st)
524
        s->ctx_flags |= AVFMTCTX_NOHEADER;
525

    
526
    if (s->oformat && CONFIG_RTSP_MUXER) {
527
        rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
528
                                      rtsp_st->rtp_handle,
529
                                      RTSP_TCP_MAX_PACKET_SIZE);
530
        /* Ownership of rtp_handle is passed to the rtp mux context */
531
        rtsp_st->rtp_handle = NULL;
532
    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
533
        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
534
                                            rtsp_st->dynamic_protocol_context,
535
                                            rtsp_st->dynamic_handler);
536
    else if (CONFIG_RTPDEC)
537
        rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
538
                                         rtsp_st->sdp_payload_type,
539
            (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
540
            ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
541

    
542
    if (!rtsp_st->transport_priv) {
543
         return AVERROR(ENOMEM);
544
    } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
545
        if (rtsp_st->dynamic_handler) {
546
            rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
547
                                           rtsp_st->dynamic_protocol_context,
548
                                           rtsp_st->dynamic_handler);
549
        }
550
    }
551

    
552
    return 0;
553
}
554

    
555
#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
556
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
557
{
558
    const char *p;
559
    int v;
560

    
561
    p = *pp;
562
    p += strspn(p, SPACE_CHARS);
563
    v = strtol(p, (char **)&p, 10);
564
    if (*p == '-') {
565
        p++;
566
        *min_ptr = v;
567
        v = strtol(p, (char **)&p, 10);
568
        *max_ptr = v;
569
    } else {
570
        *min_ptr = v;
571
        *max_ptr = v;
572
    }
573
    *pp = p;
574
}
575

    
576
/* XXX: only one transport specification is parsed */
577
static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
578
{
579
    char transport_protocol[16];
580
    char profile[16];
581
    char lower_transport[16];
582
    char parameter[16];
583
    RTSPTransportField *th;
584
    char buf[256];
585

    
586
    reply->nb_transports = 0;
587

    
588
    for (;;) {
589
        p += strspn(p, SPACE_CHARS);
590
        if (*p == '\0')
591
            break;
592

    
593
        th = &reply->transports[reply->nb_transports];
594

    
595
        get_word_sep(transport_protocol, sizeof(transport_protocol),
596
                     "/", &p);
597
        if (!strcasecmp (transport_protocol, "rtp")) {
598
            get_word_sep(profile, sizeof(profile), "/;,", &p);
599
            lower_transport[0] = '\0';
600
            /* rtp/avp/<protocol> */
601
            if (*p == '/') {
602
                get_word_sep(lower_transport, sizeof(lower_transport),
603
                             ";,", &p);
604
            }
605
            th->transport = RTSP_TRANSPORT_RTP;
606
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
607
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
608
            /* x-pn-tng/<protocol> */
609
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
610
            profile[0] = '\0';
611
            th->transport = RTSP_TRANSPORT_RDT;
612
        }
613
        if (!strcasecmp(lower_transport, "TCP"))
614
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
615
        else
616
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
617

    
618
        if (*p == ';')
619
            p++;
620
        /* get each parameter */
621
        while (*p != '\0' && *p != ',') {
622
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
623
            if (!strcmp(parameter, "port")) {
624
                if (*p == '=') {
625
                    p++;
626
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
627
                }
628
            } else if (!strcmp(parameter, "client_port")) {
629
                if (*p == '=') {
630
                    p++;
631
                    rtsp_parse_range(&th->client_port_min,
632
                                     &th->client_port_max, &p);
633
                }
634
            } else if (!strcmp(parameter, "server_port")) {
635
                if (*p == '=') {
636
                    p++;
637
                    rtsp_parse_range(&th->server_port_min,
638
                                     &th->server_port_max, &p);
639
                }
640
            } else if (!strcmp(parameter, "interleaved")) {
641
                if (*p == '=') {
642
                    p++;
643
                    rtsp_parse_range(&th->interleaved_min,
644
                                     &th->interleaved_max, &p);
645
                }
646
            } else if (!strcmp(parameter, "multicast")) {
647
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
648
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
649
            } else if (!strcmp(parameter, "ttl")) {
650
                if (*p == '=') {
651
                    p++;
652
                    th->ttl = strtol(p, (char **)&p, 10);
653
                }
654
            } else if (!strcmp(parameter, "destination")) {
655
                if (*p == '=') {
656
                    p++;
657
                    get_word_sep(buf, sizeof(buf), ";,", &p);
658
                    get_sockaddr(buf, &th->destination);
659
                }
660
            } else if (!strcmp(parameter, "source")) {
661
                if (*p == '=') {
662
                    p++;
663
                    get_word_sep(buf, sizeof(buf), ";,", &p);
664
                    av_strlcpy(th->source, buf, sizeof(th->source));
665
                }
666
            }
667

    
668
            while (*p != ';' && *p != '\0' && *p != ',')
669
                p++;
670
            if (*p == ';')
671
                p++;
672
        }
673
        if (*p == ',')
674
            p++;
675

    
676
        reply->nb_transports++;
677
    }
678
}
679

    
680
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
681
                        HTTPAuthState *auth_state)
682
{
683
    const char *p;
684

    
685
    /* NOTE: we do case independent match for broken servers */
686
    p = buf;
687
    if (av_stristart(p, "Session:", &p)) {
688
        int t;
689
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
690
        if (av_stristart(p, ";timeout=", &p) &&
691
            (t = strtol(p, NULL, 10)) > 0) {
692
            reply->timeout = t;
693
        }
694
    } else if (av_stristart(p, "Content-Length:", &p)) {
695
        reply->content_length = strtol(p, NULL, 10);
696
    } else if (av_stristart(p, "Transport:", &p)) {
697
        rtsp_parse_transport(reply, p);
698
    } else if (av_stristart(p, "CSeq:", &p)) {
699
        reply->seq = strtol(p, NULL, 10);
700
    } else if (av_stristart(p, "Range:", &p)) {
701
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
702
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
703
        p += strspn(p, SPACE_CHARS);
704
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
705
    } else if (av_stristart(p, "Server:", &p)) {
706
        p += strspn(p, SPACE_CHARS);
707
        av_strlcpy(reply->server, p, sizeof(reply->server));
708
    } else if (av_stristart(p, "Notice:", &p) ||
709
               av_stristart(p, "X-Notice:", &p)) {
710
        reply->notice = strtol(p, NULL, 10);
711
    } else if (av_stristart(p, "Location:", &p)) {
712
        p += strspn(p, SPACE_CHARS);
713
        av_strlcpy(reply->location, p , sizeof(reply->location));
714
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && auth_state) {
715
        p += strspn(p, SPACE_CHARS);
716
        ff_http_auth_handle_header(auth_state, "WWW-Authenticate", p);
717
    } else if (av_stristart(p, "Authentication-Info:", &p) && auth_state) {
718
        p += strspn(p, SPACE_CHARS);
719
        ff_http_auth_handle_header(auth_state, "Authentication-Info", p);
720
    } else if (av_stristart(p, "Content-Base:", &p)) {
721
        p += strspn(p, SPACE_CHARS);
722
        av_strlcpy(reply->content_base, p , sizeof(reply->content_base));
723
    }
724
}
725

    
726
/* skip a RTP/TCP interleaved packet */
727
void ff_rtsp_skip_packet(AVFormatContext *s)
728
{
729
    RTSPState *rt = s->priv_data;
730
    int ret, len, len1;
731
    uint8_t buf[1024];
732

    
733
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
734
    if (ret != 3)
735
        return;
736
    len = AV_RB16(buf + 1);
737

    
738
    dprintf(s, "skipping RTP packet len=%d\n", len);
739

    
740
    /* skip payload */
741
    while (len > 0) {
742
        len1 = len;
743
        if (len1 > sizeof(buf))
744
            len1 = sizeof(buf);
745
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
746
        if (ret != len1)
747
            return;
748
        len -= len1;
749
    }
750
}
751

    
752
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
753
                       unsigned char **content_ptr,
754
                       int return_on_interleaved_data)
755
{
756
    RTSPState *rt = s->priv_data;
757
    char buf[4096], buf1[1024], *q;
758
    unsigned char ch;
759
    const char *p;
760
    int ret, content_length, line_count = 0;
761
    unsigned char *content = NULL;
762

    
763
    memset(reply, 0, sizeof(*reply));
764

    
765
    /* parse reply (XXX: use buffers) */
766
    rt->last_reply[0] = '\0';
767
    for (;;) {
768
        q = buf;
769
        for (;;) {
770
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
771
#ifdef DEBUG_RTP_TCP
772
            dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
773
#endif
774
            if (ret != 1)
775
                return AVERROR_EOF;
776
            if (ch == '\n')
777
                break;
778
            if (ch == '$') {
779
                /* XXX: only parse it if first char on line ? */
780
                if (return_on_interleaved_data) {
781
                    return 1;
782
                } else
783
                    ff_rtsp_skip_packet(s);
784
            } else if (ch != '\r') {
785
                if ((q - buf) < sizeof(buf) - 1)
786
                    *q++ = ch;
787
            }
788
        }
789
        *q = '\0';
790

    
791
        dprintf(s, "line='%s'\n", buf);
792

    
793
        /* test if last line */
794
        if (buf[0] == '\0')
795
            break;
796
        p = buf;
797
        if (line_count == 0) {
798
            /* get reply code */
799
            get_word(buf1, sizeof(buf1), &p);
800
            get_word(buf1, sizeof(buf1), &p);
801
            reply->status_code = atoi(buf1);
802
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
803
        } else {
804
            ff_rtsp_parse_line(reply, p, &rt->auth_state);
805
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
806
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
807
        }
808
        line_count++;
809
    }
810

    
811
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
812
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
813

    
814
    content_length = reply->content_length;
815
    if (content_length > 0) {
816
        /* leave some room for a trailing '\0' (useful for simple parsing) */
817
        content = av_malloc(content_length + 1);
818
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
819
        content[content_length] = '\0';
820
    }
821
    if (content_ptr)
822
        *content_ptr = content;
823
    else
824
        av_free(content);
825

    
826
    if (rt->seq != reply->seq) {
827
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
828
            rt->seq, reply->seq);
829
    }
830

    
831
    /* EOS */
832
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
833
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
834
        reply->notice == 2306 /* Continuous Feed Terminated */) {
835
        rt->state = RTSP_STATE_IDLE;
836
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
837
        return AVERROR(EIO); /* data or server error */
838
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
839
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
840
        return AVERROR(EPERM);
841

    
842
    return 0;
843
}
844

    
845
int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
846
                                        const char *method, const char *url,
847
                                        const char *headers,
848
                                        const unsigned char *send_content,
849
                                        int send_content_length)
850
{
851
    RTSPState *rt = s->priv_data;
852
    char buf[4096], *out_buf;
853
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
854

    
855
    /* Add in RTSP headers */
856
    out_buf = buf;
857
    rt->seq++;
858
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
859
    if (headers)
860
        av_strlcat(buf, headers, sizeof(buf));
861
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
862
    if (rt->session_id[0] != '\0' && (!headers ||
863
        !strstr(headers, "\nIf-Match:"))) {
864
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
865
    }
866
    if (rt->auth[0]) {
867
        char *str = ff_http_auth_create_response(&rt->auth_state,
868
                                                 rt->auth, url, method);
869
        if (str)
870
            av_strlcat(buf, str, sizeof(buf));
871
        av_free(str);
872
    }
873
    if (send_content_length > 0 && send_content)
874
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
875
    av_strlcat(buf, "\r\n", sizeof(buf));
876

    
877
    /* base64 encode rtsp if tunneling */
878
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
879
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
880
        out_buf = base64buf;
881
    }
882

    
883
    dprintf(s, "Sending:\n%s--\n", buf);
884

    
885
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
886
    if (send_content_length > 0 && send_content) {
887
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
888
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
889
                                    "with content data not supported\n");
890
            return AVERROR_PATCHWELCOME;
891
        }
892
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
893
    }
894
    rt->last_cmd_time = av_gettime();
895

    
896
    return 0;
897
}
898

    
899
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
900
                           const char *url, const char *headers)
901
{
902
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
903
}
904

    
905
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
906
                     const char *headers, RTSPMessageHeader *reply,
907
                     unsigned char **content_ptr)
908
{
909
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
910
                                         content_ptr, NULL, 0);
911
}
912

    
913
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
914
                                  const char *method, const char *url,
915
                                  const char *header,
916
                                  RTSPMessageHeader *reply,
917
                                  unsigned char **content_ptr,
918
                                  const unsigned char *send_content,
919
                                  int send_content_length)
920
{
921
    RTSPState *rt = s->priv_data;
922
    HTTPAuthType cur_auth_type;
923
    int ret;
924

    
925
retry:
926
    cur_auth_type = rt->auth_state.auth_type;
927
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
928
                                                   send_content,
929
                                                   send_content_length)))
930
        return ret;
931

    
932
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0) ) < 0)
933
        return ret;
934

    
935
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
936
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
937
        goto retry;
938

    
939
    if (reply->status_code > 400){
940
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
941
               method,
942
               reply->status_code,
943
               reply->reason);
944
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
945
    }
946

    
947
    return 0;
948
}
949

    
950
/**
951
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
952
 */
953
static int make_setup_request(AVFormatContext *s, const char *host, int port,
954
                              int lower_transport, const char *real_challenge)
955
{
956
    RTSPState *rt = s->priv_data;
957
    int rtx, j, i, err, interleave = 0;
958
    RTSPStream *rtsp_st;
959
    RTSPMessageHeader reply1, *reply = &reply1;
960
    char cmd[2048];
961
    const char *trans_pref;
962

    
963
    if (rt->transport == RTSP_TRANSPORT_RDT)
964
        trans_pref = "x-pn-tng";
965
    else
966
        trans_pref = "RTP/AVP";
967

    
968
    /* default timeout: 1 minute */
969
    rt->timeout = 60;
970

    
971
    /* for each stream, make the setup request */
972
    /* XXX: we assume the same server is used for the control of each
973
     * RTSP stream */
974

    
975
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
976
        char transport[2048];
977

    
978
        /**
979
         * WMS serves all UDP data over a single connection, the RTX, which
980
         * isn't necessarily the first in the SDP but has to be the first
981
         * to be set up, else the second/third SETUP will fail with a 461.
982
         */
983
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
984
             rt->server_type == RTSP_SERVER_WMS) {
985
            if (i == 0) {
986
                /* rtx first */
987
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
988
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
989
                    if (len >= 4 &&
990
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
991
                                "/rtx"))
992
                        break;
993
                }
994
                if (rtx == rt->nb_rtsp_streams)
995
                    return -1; /* no RTX found */
996
                rtsp_st = rt->rtsp_streams[rtx];
997
            } else
998
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
999
        } else
1000
            rtsp_st = rt->rtsp_streams[i];
1001

    
1002
        /* RTP/UDP */
1003
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1004
            char buf[256];
1005

    
1006
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1007
                port = reply->transports[0].client_port_min;
1008
                goto have_port;
1009
            }
1010

    
1011
            /* first try in specified port range */
1012
            if (RTSP_RTP_PORT_MIN != 0) {
1013
                while (j <= RTSP_RTP_PORT_MAX) {
1014
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1015
                                "?localport=%d", j);
1016
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1017
                    j += 2;
1018
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1019
                        goto rtp_opened;
1020
                }
1021
            }
1022

    
1023
#if 0
1024
            /* then try on any port */
1025
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1026
                err = AVERROR_INVALIDDATA;
1027
                goto fail;
1028
            }
1029
#endif
1030

    
1031
        rtp_opened:
1032
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1033
        have_port:
1034
            snprintf(transport, sizeof(transport) - 1,
1035
                     "%s/UDP;", trans_pref);
1036
            if (rt->server_type != RTSP_SERVER_REAL)
1037
                av_strlcat(transport, "unicast;", sizeof(transport));
1038
            av_strlcatf(transport, sizeof(transport),
1039
                     "client_port=%d", port);
1040
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1041
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1042
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1043
        }
1044

    
1045
        /* RTP/TCP */
1046
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1047
            /** For WMS streams, the application streams are only used for
1048
             * UDP. When trying to set it up for TCP streams, the server
1049
             * will return an error. Therefore, we skip those streams. */
1050
            if (rt->server_type == RTSP_SERVER_WMS &&
1051
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1052
                    AVMEDIA_TYPE_DATA)
1053
                continue;
1054
            snprintf(transport, sizeof(transport) - 1,
1055
                     "%s/TCP;", trans_pref);
1056
            if (rt->server_type == RTSP_SERVER_WMS)
1057
                av_strlcat(transport, "unicast;", sizeof(transport));
1058
            av_strlcatf(transport, sizeof(transport),
1059
                        "interleaved=%d-%d",
1060
                        interleave, interleave + 1);
1061
            interleave += 2;
1062
        }
1063

    
1064
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1065
            snprintf(transport, sizeof(transport) - 1,
1066
                     "%s/UDP;multicast", trans_pref);
1067
        }
1068
        if (s->oformat) {
1069
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1070
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1071
                   rt->server_type == RTSP_SERVER_WMS)
1072
            av_strlcat(transport, ";mode=play", sizeof(transport));
1073
        snprintf(cmd, sizeof(cmd),
1074
                 "Transport: %s\r\n",
1075
                 transport);
1076
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1077
            char real_res[41], real_csum[9];
1078
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1079
                                              real_challenge);
1080
            av_strlcatf(cmd, sizeof(cmd),
1081
                        "If-Match: %s\r\n"
1082
                        "RealChallenge2: %s, sd=%s\r\n",
1083
                        rt->session_id, real_res, real_csum);
1084
        }
1085
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1086
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1087
            err = 1;
1088
            goto fail;
1089
        } else if (reply->status_code != RTSP_STATUS_OK ||
1090
                   reply->nb_transports != 1) {
1091
            err = AVERROR_INVALIDDATA;
1092
            goto fail;
1093
        }
1094

    
1095
        /* XXX: same protocol for all streams is required */
1096
        if (i > 0) {
1097
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1098
                reply->transports[0].transport != rt->transport) {
1099
                err = AVERROR_INVALIDDATA;
1100
                goto fail;
1101
            }
1102
        } else {
1103
            rt->lower_transport = reply->transports[0].lower_transport;
1104
            rt->transport = reply->transports[0].transport;
1105
        }
1106

    
1107
        /* close RTP connection if not chosen */
1108
        if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1109
            (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1110
            url_close(rtsp_st->rtp_handle);
1111
            rtsp_st->rtp_handle = NULL;
1112
        }
1113

    
1114
        switch(reply->transports[0].lower_transport) {
1115
        case RTSP_LOWER_TRANSPORT_TCP:
1116
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1117
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1118
            break;
1119

    
1120
        case RTSP_LOWER_TRANSPORT_UDP: {
1121
            char url[1024];
1122

    
1123
            /* Use source address if specified */
1124
            if (reply->transports[0].source[0]) {
1125
                ff_url_join(url, sizeof(url), "rtp", NULL,
1126
                            reply->transports[0].source,
1127
                            reply->transports[0].server_port_min, NULL);
1128
            } else {
1129
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1130
                            reply->transports[0].server_port_min, NULL);
1131
            }
1132
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1133
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1134
                err = AVERROR_INVALIDDATA;
1135
                goto fail;
1136
            }
1137
            /* Try to initialize the connection state in a
1138
             * potential NAT router by sending dummy packets.
1139
             * RTP/RTCP dummy packets are used for RDT, too.
1140
             */
1141
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1142
                CONFIG_RTPDEC)
1143
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1144
            break;
1145
        }
1146
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1147
            char url[1024], namebuf[50];
1148
            struct sockaddr_storage addr;
1149
            int port, ttl;
1150

    
1151
            if (reply->transports[0].destination.ss_family) {
1152
                addr      = reply->transports[0].destination;
1153
                port      = reply->transports[0].port_min;
1154
                ttl       = reply->transports[0].ttl;
1155
            } else {
1156
                addr      = rtsp_st->sdp_ip;
1157
                port      = rtsp_st->sdp_port;
1158
                ttl       = rtsp_st->sdp_ttl;
1159
            }
1160
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1161
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1162
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1163
                        port, "?ttl=%d", ttl);
1164
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1165
                err = AVERROR_INVALIDDATA;
1166
                goto fail;
1167
            }
1168
            break;
1169
        }
1170
        }
1171

    
1172
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1173
            goto fail;
1174
    }
1175

    
1176
    if (reply->timeout > 0)
1177
        rt->timeout = reply->timeout;
1178

    
1179
    if (rt->server_type == RTSP_SERVER_REAL)
1180
        rt->need_subscription = 1;
1181

    
1182
    return 0;
1183

    
1184
fail:
1185
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1186
        if (rt->rtsp_streams[i]->rtp_handle) {
1187
            url_close(rt->rtsp_streams[i]->rtp_handle);
1188
            rt->rtsp_streams[i]->rtp_handle = NULL;
1189
        }
1190
    }
1191
    return err;
1192
}
1193

    
1194
void ff_rtsp_close_connections(AVFormatContext *s)
1195
{
1196
    RTSPState *rt = s->priv_data;
1197
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1198
    url_close(rt->rtsp_hd);
1199
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1200
}
1201

    
1202
int ff_rtsp_connect(AVFormatContext *s)
1203
{
1204
    RTSPState *rt = s->priv_data;
1205
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1206
    char *option_list, *option, *filename;
1207
    int port, err, tcp_fd;
1208
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1209
    int lower_transport_mask = 0;
1210
    char real_challenge[64];
1211
    struct sockaddr_storage peer;
1212
    socklen_t peer_len = sizeof(peer);
1213

    
1214
    if (!ff_network_init())
1215
        return AVERROR(EIO);
1216
redirect:
1217
    rt->control_transport = RTSP_MODE_PLAIN;
1218
    /* extract hostname and port */
1219
    av_url_split(NULL, 0, auth, sizeof(auth),
1220
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1221
    if (*auth) {
1222
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1223
    }
1224
    if (port < 0)
1225
        port = RTSP_DEFAULT_PORT;
1226

    
1227
    /* search for options */
1228
    option_list = strrchr(path, '?');
1229
    if (option_list) {
1230
        /* Strip out the RTSP specific options, write out the rest of
1231
         * the options back into the same string. */
1232
        filename = option_list;
1233
        while (option_list) {
1234
            /* move the option pointer */
1235
            option = ++option_list;
1236
            option_list = strchr(option_list, '&');
1237
            if (option_list)
1238
                *option_list = 0;
1239

    
1240
            /* handle the options */
1241
            if (!strcmp(option, "udp")) {
1242
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1243
            } else if (!strcmp(option, "multicast")) {
1244
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1245
            } else if (!strcmp(option, "tcp")) {
1246
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1247
            } else if(!strcmp(option, "http")) {
1248
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1249
                rt->control_transport = RTSP_MODE_TUNNEL;
1250
            } else {
1251
                /* Write options back into the buffer, using memmove instead
1252
                 * of strcpy since the strings may overlap. */
1253
                int len = strlen(option);
1254
                memmove(++filename, option, len);
1255
                filename += len;
1256
                if (option_list) *filename = '&';
1257
            }
1258
        }
1259
        *filename = 0;
1260
    }
1261

    
1262
    if (!lower_transport_mask)
1263
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1264

    
1265
    if (s->oformat) {
1266
        /* Only UDP or TCP - UDP multicast isn't supported. */
1267
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1268
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1269
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1270
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1271
                                    "only UDP and TCP are supported for output.\n");
1272
            err = AVERROR(EINVAL);
1273
            goto fail;
1274
        }
1275
    }
1276

    
1277
    /* Construct the URI used in request; this is similar to s->filename,
1278
     * but with authentication credentials removed and RTSP specific options
1279
     * stripped out. */
1280
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1281
                host, port, "%s", path);
1282

    
1283
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1284
        /* set up initial handshake for tunneling */
1285
        char httpname[1024];
1286
        char sessioncookie[17];
1287
        char headers[1024];
1288

    
1289
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1290
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1291
                 av_get_random_seed(), av_get_random_seed());
1292

    
1293
        /* GET requests */
1294
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1295
            err = AVERROR(EIO);
1296
            goto fail;
1297
        }
1298

    
1299
        /* generate GET headers */
1300
        snprintf(headers, sizeof(headers),
1301
                 "x-sessioncookie: %s\r\n"
1302
                 "Accept: application/x-rtsp-tunnelled\r\n"
1303
                 "Pragma: no-cache\r\n"
1304
                 "Cache-Control: no-cache\r\n",
1305
                 sessioncookie);
1306
        ff_http_set_headers(rt->rtsp_hd, headers);
1307

    
1308
        /* complete the connection */
1309
        if (url_connect(rt->rtsp_hd)) {
1310
            err = AVERROR(EIO);
1311
            goto fail;
1312
        }
1313

    
1314
        /* POST requests */
1315
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1316
            err = AVERROR(EIO);
1317
            goto fail;
1318
        }
1319

    
1320
        /* generate POST headers */
1321
        snprintf(headers, sizeof(headers),
1322
                 "x-sessioncookie: %s\r\n"
1323
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1324
                 "Pragma: no-cache\r\n"
1325
                 "Cache-Control: no-cache\r\n"
1326
                 "Content-Length: 32767\r\n"
1327
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1328
                 sessioncookie);
1329
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1330
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1331

    
1332
        /* Initialize the authentication state for the POST session. The HTTP
1333
         * protocol implementation doesn't properly handle multi-pass
1334
         * authentication for POST requests, since it would require one of
1335
         * the following:
1336
         * - implementing Expect: 100-continue, which many HTTP servers
1337
         *   don't support anyway, even less the RTSP servers that do HTTP
1338
         *   tunneling
1339
         * - sending the whole POST data until getting a 401 reply specifying
1340
         *   what authentication method to use, then resending all that data
1341
         * - waiting for potential 401 replies directly after sending the
1342
         *   POST header (waiting for some unspecified time)
1343
         * Therefore, we copy the full auth state, which works for both basic
1344
         * and digest. (For digest, we would have to synchronize the nonce
1345
         * count variable between the two sessions, if we'd do more requests
1346
         * with the original session, though.)
1347
         */
1348
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1349

    
1350
        /* complete the connection */
1351
        if (url_connect(rt->rtsp_hd_out)) {
1352
            err = AVERROR(EIO);
1353
            goto fail;
1354
        }
1355
    } else {
1356
        /* open the tcp connection */
1357
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1358
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1359
            err = AVERROR(EIO);
1360
            goto fail;
1361
        }
1362
        rt->rtsp_hd_out = rt->rtsp_hd;
1363
    }
1364
    rt->seq = 0;
1365

    
1366
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1367
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1368
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1369
                    NULL, 0, NI_NUMERICHOST);
1370
    }
1371

    
1372
    /* request options supported by the server; this also detects server
1373
     * type */
1374
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1375
        cmd[0] = 0;
1376
        if (rt->server_type == RTSP_SERVER_REAL)
1377
            av_strlcat(cmd,
1378
                       /**
1379
                        * The following entries are required for proper
1380
                        * streaming from a Realmedia server. They are
1381
                        * interdependent in some way although we currently
1382
                        * don't quite understand how. Values were copied
1383
                        * from mplayer SVN r23589.
1384
                        * @param CompanyID is a 16-byte ID in base64
1385
                        * @param ClientChallenge is a 16-byte ID in hex
1386
                        */
1387
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1388
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1389
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1390
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1391
                       sizeof(cmd));
1392
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1393
        if (reply->status_code != RTSP_STATUS_OK) {
1394
            err = AVERROR_INVALIDDATA;
1395
            goto fail;
1396
        }
1397

    
1398
        /* detect server type if not standard-compliant RTP */
1399
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1400
            rt->server_type = RTSP_SERVER_REAL;
1401
            continue;
1402
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1403
            rt->server_type = RTSP_SERVER_WMS;
1404
        } else if (rt->server_type == RTSP_SERVER_REAL)
1405
            strcpy(real_challenge, reply->real_challenge);
1406
        break;
1407
    }
1408

    
1409
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1410
        err = ff_rtsp_setup_input_streams(s, reply);
1411
    else if (CONFIG_RTSP_MUXER)
1412
        err = ff_rtsp_setup_output_streams(s, host);
1413
    if (err)
1414
        goto fail;
1415

    
1416
    do {
1417
        int lower_transport = ff_log2_tab[lower_transport_mask &
1418
                                  ~(lower_transport_mask - 1)];
1419

    
1420
        err = make_setup_request(s, host, port, lower_transport,
1421
                                 rt->server_type == RTSP_SERVER_REAL ?
1422
                                     real_challenge : NULL);
1423
        if (err < 0)
1424
            goto fail;
1425
        lower_transport_mask &= ~(1 << lower_transport);
1426
        if (lower_transport_mask == 0 && err == 1) {
1427
            err = FF_NETERROR(EPROTONOSUPPORT);
1428
            goto fail;
1429
        }
1430
    } while (err);
1431

    
1432
    rt->state = RTSP_STATE_IDLE;
1433
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1434
    return 0;
1435
 fail:
1436
    ff_rtsp_close_streams(s);
1437
    ff_rtsp_close_connections(s);
1438
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1439
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1440
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1441
               reply->status_code,
1442
               s->filename);
1443
        goto redirect;
1444
    }
1445
    ff_network_close();
1446
    return err;
1447
}
1448
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1449

    
1450
#if CONFIG_RTPDEC
1451
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1452
                           uint8_t *buf, int buf_size, int64_t wait_end)
1453
{
1454
    RTSPState *rt = s->priv_data;
1455
    RTSPStream *rtsp_st;
1456
    fd_set rfds;
1457
    int fd, fd_rtcp, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1458
    struct timeval tv;
1459

    
1460
    for (;;) {
1461
        if (url_interrupt_cb())
1462
            return AVERROR(EINTR);
1463
        if (wait_end && wait_end - av_gettime() < 0)
1464
            return AVERROR(EAGAIN);
1465
        FD_ZERO(&rfds);
1466
        if (rt->rtsp_hd) {
1467
            tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1468
            FD_SET(tcp_fd, &rfds);
1469
        } else {
1470
            fd_max = 0;
1471
            tcp_fd = -1;
1472
        }
1473
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1474
            rtsp_st = rt->rtsp_streams[i];
1475
            if (rtsp_st->rtp_handle) {
1476
                fd = url_get_file_handle(rtsp_st->rtp_handle);
1477
                fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1478
                if (FFMAX(fd, fd_rtcp) > fd_max)
1479
                    fd_max = FFMAX(fd, fd_rtcp);
1480
                FD_SET(fd, &rfds);
1481
                FD_SET(fd_rtcp, &rfds);
1482
            }
1483
        }
1484
        tv.tv_sec = 0;
1485
        tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1486
        n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1487
        if (n > 0) {
1488
            timeout_cnt = 0;
1489
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1490
                rtsp_st = rt->rtsp_streams[i];
1491
                if (rtsp_st->rtp_handle) {
1492
                    fd = url_get_file_handle(rtsp_st->rtp_handle);
1493
                    fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1494
                    if (FD_ISSET(fd_rtcp, &rfds) || FD_ISSET(fd, &rfds)) {
1495
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1496
                        if (ret > 0) {
1497
                            *prtsp_st = rtsp_st;
1498
                            return ret;
1499
                        }
1500
                    }
1501
                }
1502
            }
1503
#if CONFIG_RTSP_DEMUXER
1504
            if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1505
                RTSPMessageHeader reply;
1506

    
1507
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0);
1508
                if (ret < 0)
1509
                    return ret;
1510
                /* XXX: parse message */
1511
                if (rt->state != RTSP_STATE_STREAMING)
1512
                    return 0;
1513
            }
1514
#endif
1515
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1516
            return FF_NETERROR(ETIMEDOUT);
1517
        } else if (n < 0 && errno != EINTR)
1518
            return AVERROR(errno);
1519
    }
1520
}
1521

    
1522
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1523
{
1524
    RTSPState *rt = s->priv_data;
1525
    int ret, len;
1526
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1527
    int64_t wait_end = 0;
1528

    
1529
    if (rt->nb_byes == rt->nb_rtsp_streams)
1530
        return AVERROR_EOF;
1531

    
1532
    /* get next frames from the same RTP packet */
1533
    if (rt->cur_transport_priv) {
1534
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1535
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1536
        } else
1537
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1538
        if (ret == 0) {
1539
            rt->cur_transport_priv = NULL;
1540
            return 0;
1541
        } else if (ret == 1) {
1542
            return 0;
1543
        } else
1544
            rt->cur_transport_priv = NULL;
1545
    }
1546

    
1547
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1548
        int i;
1549
        int64_t first_queue_time = 0;
1550
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1551
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1552
            int64_t queue_time = ff_rtp_queued_packet_time(rtpctx);
1553
            if (queue_time && (queue_time - first_queue_time < 0 ||
1554
                               !first_queue_time)) {
1555
                first_queue_time = queue_time;
1556
                first_queue_st   = rt->rtsp_streams[i];
1557
            }
1558
        }
1559
        if (first_queue_time)
1560
            wait_end = first_queue_time + s->max_delay;
1561
    }
1562

    
1563
    /* read next RTP packet */
1564
 redo:
1565
    if (!rt->recvbuf) {
1566
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1567
        if (!rt->recvbuf)
1568
            return AVERROR(ENOMEM);
1569
    }
1570

    
1571
    switch(rt->lower_transport) {
1572
    default:
1573
#if CONFIG_RTSP_DEMUXER
1574
    case RTSP_LOWER_TRANSPORT_TCP:
1575
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1576
        break;
1577
#endif
1578
    case RTSP_LOWER_TRANSPORT_UDP:
1579
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1580
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1581
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1582
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1583
        break;
1584
    }
1585
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1586
        rt->transport == RTSP_TRANSPORT_RTP) {
1587
        rtsp_st = first_queue_st;
1588
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1589
        goto end;
1590
    }
1591
    if (len < 0)
1592
        return len;
1593
    if (len == 0)
1594
        return AVERROR_EOF;
1595
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1596
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1597
    } else {
1598
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1599
        if (ret < 0) {
1600
            /* Either bad packet, or a RTCP packet. Check if the
1601
             * first_rtcp_ntp_time field was initialized. */
1602
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1603
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1604
                /* first_rtcp_ntp_time has been initialized for this stream,
1605
                 * copy the same value to all other uninitialized streams,
1606
                 * in order to map their timestamp origin to the same ntp time
1607
                 * as this one. */
1608
                int i;
1609
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1610
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1611
                    if (rtpctx2 &&
1612
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE)
1613
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1614
                }
1615
            }
1616
            if (ret == -RTCP_BYE) {
1617
                rt->nb_byes++;
1618

    
1619
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1620
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1621

    
1622
                if (rt->nb_byes == rt->nb_rtsp_streams)
1623
                    return AVERROR_EOF;
1624
            }
1625
        }
1626
    }
1627
end:
1628
    if (ret < 0)
1629
        goto redo;
1630
    if (ret == 1)
1631
        /* more packets may follow, so we save the RTP context */
1632
        rt->cur_transport_priv = rtsp_st->transport_priv;
1633

    
1634
    return ret;
1635
}
1636
#endif /* CONFIG_RTPDEC */
1637

    
1638
#if CONFIG_SDP_DEMUXER
1639
static int sdp_probe(AVProbeData *p1)
1640
{
1641
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1642

    
1643
    /* we look for a line beginning "c=IN IP" */
1644
    while (p < p_end && *p != '\0') {
1645
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1646
            av_strstart(p, "c=IN IP", NULL))
1647
            return AVPROBE_SCORE_MAX / 2;
1648

    
1649
        while (p < p_end - 1 && *p != '\n') p++;
1650
        if (++p >= p_end)
1651
            break;
1652
        if (*p == '\r')
1653
            p++;
1654
    }
1655
    return 0;
1656
}
1657

    
1658
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1659
{
1660
    RTSPState *rt = s->priv_data;
1661
    RTSPStream *rtsp_st;
1662
    int size, i, err;
1663
    char *content;
1664
    char url[1024];
1665

    
1666
    if (!ff_network_init())
1667
        return AVERROR(EIO);
1668

    
1669
    /* read the whole sdp file */
1670
    /* XXX: better loading */
1671
    content = av_malloc(SDP_MAX_SIZE);
1672
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1673
    if (size <= 0) {
1674
        av_free(content);
1675
        return AVERROR_INVALIDDATA;
1676
    }
1677
    content[size] ='\0';
1678

    
1679
    ff_sdp_parse(s, content);
1680
    av_free(content);
1681

    
1682
    /* open each RTP stream */
1683
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1684
        char namebuf[50];
1685
        rtsp_st = rt->rtsp_streams[i];
1686

    
1687
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1688
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1689
        ff_url_join(url, sizeof(url), "rtp", NULL,
1690
                    namebuf, rtsp_st->sdp_port,
1691
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1692
                    rtsp_st->sdp_ttl);
1693
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1694
            err = AVERROR_INVALIDDATA;
1695
            goto fail;
1696
        }
1697
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1698
            goto fail;
1699
    }
1700
    return 0;
1701
fail:
1702
    ff_rtsp_close_streams(s);
1703
    ff_network_close();
1704
    return err;
1705
}
1706

    
1707
static int sdp_read_close(AVFormatContext *s)
1708
{
1709
    ff_rtsp_close_streams(s);
1710
    ff_network_close();
1711
    return 0;
1712
}
1713

    
1714
AVInputFormat sdp_demuxer = {
1715
    "sdp",
1716
    NULL_IF_CONFIG_SMALL("SDP"),
1717
    sizeof(RTSPState),
1718
    sdp_probe,
1719
    sdp_read_header,
1720
    ff_rtsp_fetch_packet,
1721
    sdp_read_close,
1722
};
1723
#endif /* CONFIG_SDP_DEMUXER */
1724

    
1725
#if CONFIG_RTP_DEMUXER
1726
static int rtp_probe(AVProbeData *p)
1727
{
1728
    if (av_strstart(p->filename, "rtp:", NULL))
1729
        return AVPROBE_SCORE_MAX;
1730
    return 0;
1731
}
1732

    
1733
static int rtp_read_header(AVFormatContext *s,
1734
                           AVFormatParameters *ap)
1735
{
1736
    uint8_t recvbuf[1500];
1737
    char host[500], sdp[500];
1738
    int ret, port;
1739
    URLContext* in = NULL;
1740
    int payload_type;
1741
    AVCodecContext codec;
1742
    struct sockaddr_storage addr;
1743
    ByteIOContext pb;
1744
    socklen_t addrlen = sizeof(addr);
1745

    
1746
    if (!ff_network_init())
1747
        return AVERROR(EIO);
1748

    
1749
    ret = url_open(&in, s->filename, URL_RDONLY);
1750
    if (ret)
1751
        goto fail;
1752

    
1753
    while (1) {
1754
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1755
        if (ret == AVERROR(EAGAIN))
1756
            continue;
1757
        if (ret < 0)
1758
            goto fail;
1759
        if (ret < 12) {
1760
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1761
            continue;
1762
        }
1763

    
1764
        if ((recvbuf[0] & 0xc0) != 0x80) {
1765
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1766
                                      "received\n");
1767
            continue;
1768
        }
1769

    
1770
        payload_type = recvbuf[1] & 0x7f;
1771
        break;
1772
    }
1773
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1774
    url_close(in);
1775
    in = NULL;
1776

    
1777
    memset(&codec, 0, sizeof(codec));
1778
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1779
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1780
                                "without an SDP file describing it\n",
1781
                                 payload_type);
1782
        goto fail;
1783
    }
1784
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1785
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1786
                                  "properly you need an SDP file "
1787
                                  "describing it\n");
1788
    }
1789

    
1790
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1791
                 NULL, 0, s->filename);
1792

    
1793
    snprintf(sdp, sizeof(sdp),
1794
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1795
             addr.ss_family == AF_INET ? 4 : 6, host,
1796
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1797
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1798
             port, payload_type);
1799
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1800

    
1801
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1802
    s->pb = &pb;
1803

    
1804
    /* sdp_read_header initializes this again */
1805
    ff_network_close();
1806

    
1807
    ret = sdp_read_header(s, ap);
1808
    s->pb = NULL;
1809
    return ret;
1810

    
1811
fail:
1812
    if (in)
1813
        url_close(in);
1814
    ff_network_close();
1815
    return ret;
1816
}
1817

    
1818
AVInputFormat rtp_demuxer = {
1819
    "rtp",
1820
    NULL_IF_CONFIG_SMALL("RTP input format"),
1821
    sizeof(RTSPState),
1822
    rtp_probe,
1823
    rtp_read_header,
1824
    ff_rtsp_fetch_packet,
1825
    sdp_read_close,
1826
    .flags = AVFMT_NOFILE,
1827
};
1828
#endif /* CONFIG_RTP_DEMUXER */
1829