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1
/*
2
 * RTSP/SDP client
3
 * Copyright (c) 2002 Fabrice Bellard
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

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

    
28
#include <sys/time.h>
29
#if HAVE_SYS_SELECT_H
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#include <sys/select.h>
31
#endif
32
#include <strings.h>
33
#include "internal.h"
34
#include "network.h"
35
#include "os_support.h"
36
#include "http.h"
37
#include "rtsp.h"
38

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

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

    
47
/* Timeout values for socket select, in ms,
48
 * and read_packet(), in seconds  */
49
#define SELECT_TIMEOUT_MS 100
50
#define READ_PACKET_TIMEOUT_S 10
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#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
                            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
    dprintf(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
            st = s->streams[s->nb_streams - 1];
277
            rtsp_st = st->priv_data;
278
            rtsp_st->sdp_ip = sdp_ip;
279
            rtsp_st->sdp_ttl = ttl;
280
        }
281
        break;
282
    case 's':
283
        av_metadata_set2(&s->metadata, "title", p, 0);
284
        break;
285
    case 'i':
286
        if (s->nb_streams == 0) {
287
            av_metadata_set2(&s->metadata, "comment", p, 0);
288
            break;
289
        }
290
        break;
291
    case 'm':
292
        /* new stream */
293
        s1->skip_media = 0;
294
        get_word(st_type, sizeof(st_type), &p);
295
        if (!strcmp(st_type, "audio")) {
296
            codec_type = AVMEDIA_TYPE_AUDIO;
297
        } else if (!strcmp(st_type, "video")) {
298
            codec_type = AVMEDIA_TYPE_VIDEO;
299
        } else if (!strcmp(st_type, "application")) {
300
            codec_type = AVMEDIA_TYPE_DATA;
301
        } else {
302
            s1->skip_media = 1;
303
            return;
304
        }
305
        rtsp_st = av_mallocz(sizeof(RTSPStream));
306
        if (!rtsp_st)
307
            return;
308
        rtsp_st->stream_index = -1;
309
        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
310

    
311
        rtsp_st->sdp_ip = s1->default_ip;
312
        rtsp_st->sdp_ttl = s1->default_ttl;
313

    
314
        get_word(buf1, sizeof(buf1), &p); /* port */
315
        rtsp_st->sdp_port = atoi(buf1);
316

    
317
        get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
318

    
319
        /* XXX: handle list of formats */
320
        get_word(buf1, sizeof(buf1), &p); /* format list */
321
        rtsp_st->sdp_payload_type = atoi(buf1);
322

    
323
        if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
324
            /* no corresponding stream */
325
        } else {
326
            st = av_new_stream(s, 0);
327
            if (!st)
328
                return;
329
            st->priv_data = rtsp_st;
330
            rtsp_st->stream_index = st->index;
331
            st->codec->codec_type = codec_type;
332
            if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
333
                RTPDynamicProtocolHandler *handler;
334
                /* if standard payload type, we can find the codec right now */
335
                ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
336
                if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
337
                    st->codec->sample_rate > 0)
338
                    av_set_pts_info(st, 32, 1, st->codec->sample_rate);
339
                /* Even static payload types may need a custom depacketizer */
340
                handler = ff_rtp_handler_find_by_id(
341
                              rtsp_st->sdp_payload_type, st->codec->codec_type);
342
                init_rtp_handler(handler, rtsp_st, st->codec);
343
            }
344
        }
345
        /* put a default control url */
346
        av_strlcpy(rtsp_st->control_url, rt->control_uri,
347
                   sizeof(rtsp_st->control_url));
348
        break;
349
    case 'a':
350
        if (av_strstart(p, "control:", &p)) {
351
            if (s->nb_streams == 0) {
352
                if (!strncmp(p, "rtsp://", 7))
353
                    av_strlcpy(rt->control_uri, p,
354
                               sizeof(rt->control_uri));
355
            } else {
356
                char proto[32];
357
                /* get the control url */
358
                st = s->streams[s->nb_streams - 1];
359
                rtsp_st = st->priv_data;
360

    
361
                /* XXX: may need to add full url resolution */
362
                av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
363
                             NULL, NULL, 0, p);
364
                if (proto[0] == '\0') {
365
                    /* relative control URL */
366
                    if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
367
                    av_strlcat(rtsp_st->control_url, "/",
368
                               sizeof(rtsp_st->control_url));
369
                    av_strlcat(rtsp_st->control_url, p,
370
                               sizeof(rtsp_st->control_url));
371
                } else
372
                    av_strlcpy(rtsp_st->control_url, p,
373
                               sizeof(rtsp_st->control_url));
374
            }
375
        } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
376
            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
377
            get_word(buf1, sizeof(buf1), &p);
378
            payload_type = atoi(buf1);
379
            st = s->streams[s->nb_streams - 1];
380
            rtsp_st = st->priv_data;
381
            sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
382
        } else if (av_strstart(p, "fmtp:", &p) ||
383
                   av_strstart(p, "framesize:", &p)) {
384
            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
385
            // let dynamic protocol handlers have a stab at the line.
386
            get_word(buf1, sizeof(buf1), &p);
387
            payload_type = atoi(buf1);
388
            for (i = 0; i < s->nb_streams; i++) {
389
                st      = s->streams[i];
390
                rtsp_st = st->priv_data;
391
                if (rtsp_st->sdp_payload_type == payload_type &&
392
                    rtsp_st->dynamic_handler &&
393
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
394
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
395
                        rtsp_st->dynamic_protocol_context, buf);
396
            }
397
        } else if (av_strstart(p, "range:", &p)) {
398
            int64_t start, end;
399

    
400
            // this is so that seeking on a streamed file can work.
401
            rtsp_parse_range_npt(p, &start, &end);
402
            s->start_time = start;
403
            /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
404
            s->duration   = (end == AV_NOPTS_VALUE) ?
405
                            AV_NOPTS_VALUE : end - start;
406
        } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
407
            if (atoi(p) == 1)
408
                rt->transport = RTSP_TRANSPORT_RDT;
409
        } else if (av_strstart(p, "SampleRate:integer;", &p) &&
410
                   s->nb_streams > 0) {
411
            st = s->streams[s->nb_streams - 1];
412
            st->codec->sample_rate = atoi(p);
413
        } else {
414
            if (rt->server_type == RTSP_SERVER_WMS)
415
                ff_wms_parse_sdp_a_line(s, p);
416
            if (s->nb_streams > 0) {
417
                if (rt->server_type == RTSP_SERVER_REAL)
418
                    ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
419

    
420
                rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
421
                if (rtsp_st->dynamic_handler &&
422
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
423
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s,
424
                        s->nb_streams - 1,
425
                        rtsp_st->dynamic_protocol_context, buf);
426
            }
427
        }
428
        break;
429
    }
430
}
431

    
432
int ff_sdp_parse(AVFormatContext *s, const char *content)
433
{
434
    const char *p;
435
    int letter;
436
    /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
437
     * contain long SDP lines containing complete ASF Headers (several
438
     * kB) or arrays of MDPR (RM stream descriptor) headers plus
439
     * "rulebooks" describing their properties. Therefore, the SDP line
440
     * buffer is large.
441
     *
442
     * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
443
     * in rtpdec_xiph.c. */
444
    char buf[16384], *q;
445
    SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
446

    
447
    memset(s1, 0, sizeof(SDPParseState));
448
    p = content;
449
    for (;;) {
450
        p += strspn(p, SPACE_CHARS);
451
        letter = *p;
452
        if (letter == '\0')
453
            break;
454
        p++;
455
        if (*p != '=')
456
            goto next_line;
457
        p++;
458
        /* get the content */
459
        q = buf;
460
        while (*p != '\n' && *p != '\r' && *p != '\0') {
461
            if ((q - buf) < sizeof(buf) - 1)
462
                *q++ = *p;
463
            p++;
464
        }
465
        *q = '\0';
466
        sdp_parse_line(s, s1, letter, buf);
467
    next_line:
468
        while (*p != '\n' && *p != '\0')
469
            p++;
470
        if (*p == '\n')
471
            p++;
472
    }
473
    return 0;
474
}
475
#endif /* CONFIG_RTPDEC */
476

    
477
/* close and free RTSP streams */
478
void ff_rtsp_close_streams(AVFormatContext *s)
479
{
480
    RTSPState *rt = s->priv_data;
481
    int i;
482
    RTSPStream *rtsp_st;
483

    
484
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
485
        rtsp_st = rt->rtsp_streams[i];
486
        if (rtsp_st) {
487
            if (rtsp_st->transport_priv) {
488
                if (s->oformat) {
489
                    AVFormatContext *rtpctx = rtsp_st->transport_priv;
490
                    av_write_trailer(rtpctx);
491
                    if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
492
                        uint8_t *ptr;
493
                        url_close_dyn_buf(rtpctx->pb, &ptr);
494
                        av_free(ptr);
495
                    } else {
496
                        url_fclose(rtpctx->pb);
497
                    }
498
                    av_metadata_free(&rtpctx->streams[0]->metadata);
499
                    av_metadata_free(&rtpctx->metadata);
500
                    av_free(rtpctx->streams[0]);
501
                    av_free(rtpctx);
502
                } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
503
                    ff_rdt_parse_close(rtsp_st->transport_priv);
504
                else if (CONFIG_RTPDEC)
505
                    rtp_parse_close(rtsp_st->transport_priv);
506
            }
507
            if (rtsp_st->rtp_handle)
508
                url_close(rtsp_st->rtp_handle);
509
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
510
                rtsp_st->dynamic_handler->close(
511
                    rtsp_st->dynamic_protocol_context);
512
        }
513
    }
514
    av_free(rt->rtsp_streams);
515
    if (rt->asf_ctx) {
516
        av_close_input_stream (rt->asf_ctx);
517
        rt->asf_ctx = NULL;
518
    }
519
    av_free(rt->recvbuf);
520
}
521

    
522
static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
523
{
524
    RTSPState *rt = s->priv_data;
525
    AVStream *st = NULL;
526

    
527
    /* open the RTP context */
528
    if (rtsp_st->stream_index >= 0)
529
        st = s->streams[rtsp_st->stream_index];
530
    if (!st)
531
        s->ctx_flags |= AVFMTCTX_NOHEADER;
532

    
533
    if (s->oformat && CONFIG_RTSP_MUXER) {
534
        rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
535
                                      rtsp_st->rtp_handle,
536
                                      RTSP_TCP_MAX_PACKET_SIZE);
537
        /* Ownership of rtp_handle is passed to the rtp mux context */
538
        rtsp_st->rtp_handle = NULL;
539
    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
540
        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
541
                                            rtsp_st->dynamic_protocol_context,
542
                                            rtsp_st->dynamic_handler);
543
    else if (CONFIG_RTPDEC)
544
        rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
545
                                         rtsp_st->sdp_payload_type,
546
            (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
547
            ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
548

    
549
    if (!rtsp_st->transport_priv) {
550
         return AVERROR(ENOMEM);
551
    } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
552
        if (rtsp_st->dynamic_handler) {
553
            rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
554
                                           rtsp_st->dynamic_protocol_context,
555
                                           rtsp_st->dynamic_handler);
556
        }
557
    }
558

    
559
    return 0;
560
}
561

    
562
#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
563
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
564
{
565
    const char *p;
566
    int v;
567

    
568
    p = *pp;
569
    p += strspn(p, SPACE_CHARS);
570
    v = strtol(p, (char **)&p, 10);
571
    if (*p == '-') {
572
        p++;
573
        *min_ptr = v;
574
        v = strtol(p, (char **)&p, 10);
575
        *max_ptr = v;
576
    } else {
577
        *min_ptr = v;
578
        *max_ptr = v;
579
    }
580
    *pp = p;
581
}
582

    
583
/* XXX: only one transport specification is parsed */
584
static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
585
{
586
    char transport_protocol[16];
587
    char profile[16];
588
    char lower_transport[16];
589
    char parameter[16];
590
    RTSPTransportField *th;
591
    char buf[256];
592

    
593
    reply->nb_transports = 0;
594

    
595
    for (;;) {
596
        p += strspn(p, SPACE_CHARS);
597
        if (*p == '\0')
598
            break;
599

    
600
        th = &reply->transports[reply->nb_transports];
601

    
602
        get_word_sep(transport_protocol, sizeof(transport_protocol),
603
                     "/", &p);
604
        if (!strcasecmp (transport_protocol, "rtp")) {
605
            get_word_sep(profile, sizeof(profile), "/;,", &p);
606
            lower_transport[0] = '\0';
607
            /* rtp/avp/<protocol> */
608
            if (*p == '/') {
609
                get_word_sep(lower_transport, sizeof(lower_transport),
610
                             ";,", &p);
611
            }
612
            th->transport = RTSP_TRANSPORT_RTP;
613
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
614
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
615
            /* x-pn-tng/<protocol> */
616
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
617
            profile[0] = '\0';
618
            th->transport = RTSP_TRANSPORT_RDT;
619
        }
620
        if (!strcasecmp(lower_transport, "TCP"))
621
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
622
        else
623
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
624

    
625
        if (*p == ';')
626
            p++;
627
        /* get each parameter */
628
        while (*p != '\0' && *p != ',') {
629
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
630
            if (!strcmp(parameter, "port")) {
631
                if (*p == '=') {
632
                    p++;
633
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
634
                }
635
            } else if (!strcmp(parameter, "client_port")) {
636
                if (*p == '=') {
637
                    p++;
638
                    rtsp_parse_range(&th->client_port_min,
639
                                     &th->client_port_max, &p);
640
                }
641
            } else if (!strcmp(parameter, "server_port")) {
642
                if (*p == '=') {
643
                    p++;
644
                    rtsp_parse_range(&th->server_port_min,
645
                                     &th->server_port_max, &p);
646
                }
647
            } else if (!strcmp(parameter, "interleaved")) {
648
                if (*p == '=') {
649
                    p++;
650
                    rtsp_parse_range(&th->interleaved_min,
651
                                     &th->interleaved_max, &p);
652
                }
653
            } else if (!strcmp(parameter, "multicast")) {
654
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
655
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
656
            } else if (!strcmp(parameter, "ttl")) {
657
                if (*p == '=') {
658
                    p++;
659
                    th->ttl = strtol(p, (char **)&p, 10);
660
                }
661
            } else if (!strcmp(parameter, "destination")) {
662
                if (*p == '=') {
663
                    p++;
664
                    get_word_sep(buf, sizeof(buf), ";,", &p);
665
                    get_sockaddr(buf, &th->destination);
666
                }
667
            } else if (!strcmp(parameter, "source")) {
668
                if (*p == '=') {
669
                    p++;
670
                    get_word_sep(buf, sizeof(buf), ";,", &p);
671
                    av_strlcpy(th->source, buf, sizeof(th->source));
672
                }
673
            }
674

    
675
            while (*p != ';' && *p != '\0' && *p != ',')
676
                p++;
677
            if (*p == ';')
678
                p++;
679
        }
680
        if (*p == ',')
681
            p++;
682

    
683
        reply->nb_transports++;
684
    }
685
}
686

    
687
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
688
                        RTSPState *rt, const char *method)
689
{
690
    const char *p;
691

    
692
    /* NOTE: we do case independent match for broken servers */
693
    p = buf;
694
    if (av_stristart(p, "Session:", &p)) {
695
        int t;
696
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
697
        if (av_stristart(p, ";timeout=", &p) &&
698
            (t = strtol(p, NULL, 10)) > 0) {
699
            reply->timeout = t;
700
        }
701
    } else if (av_stristart(p, "Content-Length:", &p)) {
702
        reply->content_length = strtol(p, NULL, 10);
703
    } else if (av_stristart(p, "Transport:", &p)) {
704
        rtsp_parse_transport(reply, p);
705
    } else if (av_stristart(p, "CSeq:", &p)) {
706
        reply->seq = strtol(p, NULL, 10);
707
    } else if (av_stristart(p, "Range:", &p)) {
708
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
709
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
710
        p += strspn(p, SPACE_CHARS);
711
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
712
    } else if (av_stristart(p, "Server:", &p)) {
713
        p += strspn(p, SPACE_CHARS);
714
        av_strlcpy(reply->server, p, sizeof(reply->server));
715
    } else if (av_stristart(p, "Notice:", &p) ||
716
               av_stristart(p, "X-Notice:", &p)) {
717
        reply->notice = strtol(p, NULL, 10);
718
    } else if (av_stristart(p, "Location:", &p)) {
719
        p += strspn(p, SPACE_CHARS);
720
        av_strlcpy(reply->location, p , sizeof(reply->location));
721
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
722
        p += strspn(p, SPACE_CHARS);
723
        ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
724
    } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
725
        p += strspn(p, SPACE_CHARS);
726
        ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
727
    } else if (av_stristart(p, "Content-Base:", &p) && rt) {
728
        p += strspn(p, SPACE_CHARS);
729
        if (method && !strcmp(method, "DESCRIBE"))
730
            av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
731
    }
732
}
733

    
734
/* skip a RTP/TCP interleaved packet */
735
void ff_rtsp_skip_packet(AVFormatContext *s)
736
{
737
    RTSPState *rt = s->priv_data;
738
    int ret, len, len1;
739
    uint8_t buf[1024];
740

    
741
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
742
    if (ret != 3)
743
        return;
744
    len = AV_RB16(buf + 1);
745

    
746
    dprintf(s, "skipping RTP packet len=%d\n", len);
747

    
748
    /* skip payload */
749
    while (len > 0) {
750
        len1 = len;
751
        if (len1 > sizeof(buf))
752
            len1 = sizeof(buf);
753
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
754
        if (ret != len1)
755
            return;
756
        len -= len1;
757
    }
758
}
759

    
760
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
761
                       unsigned char **content_ptr,
762
                       int return_on_interleaved_data, const char *method)
763
{
764
    RTSPState *rt = s->priv_data;
765
    char buf[4096], buf1[1024], *q;
766
    unsigned char ch;
767
    const char *p;
768
    int ret, content_length, line_count = 0;
769
    unsigned char *content = NULL;
770

    
771
    memset(reply, 0, sizeof(*reply));
772

    
773
    /* parse reply (XXX: use buffers) */
774
    rt->last_reply[0] = '\0';
775
    for (;;) {
776
        q = buf;
777
        for (;;) {
778
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
779
#ifdef DEBUG_RTP_TCP
780
            dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
781
#endif
782
            if (ret != 1)
783
                return AVERROR_EOF;
784
            if (ch == '\n')
785
                break;
786
            if (ch == '$') {
787
                /* XXX: only parse it if first char on line ? */
788
                if (return_on_interleaved_data) {
789
                    return 1;
790
                } else
791
                    ff_rtsp_skip_packet(s);
792
            } else if (ch != '\r') {
793
                if ((q - buf) < sizeof(buf) - 1)
794
                    *q++ = ch;
795
            }
796
        }
797
        *q = '\0';
798

    
799
        dprintf(s, "line='%s'\n", buf);
800

    
801
        /* test if last line */
802
        if (buf[0] == '\0')
803
            break;
804
        p = buf;
805
        if (line_count == 0) {
806
            /* get reply code */
807
            get_word(buf1, sizeof(buf1), &p);
808
            get_word(buf1, sizeof(buf1), &p);
809
            reply->status_code = atoi(buf1);
810
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
811
        } else {
812
            ff_rtsp_parse_line(reply, p, rt, method);
813
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
814
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
815
        }
816
        line_count++;
817
    }
818

    
819
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
820
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
821

    
822
    content_length = reply->content_length;
823
    if (content_length > 0) {
824
        /* leave some room for a trailing '\0' (useful for simple parsing) */
825
        content = av_malloc(content_length + 1);
826
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
827
        content[content_length] = '\0';
828
    }
829
    if (content_ptr)
830
        *content_ptr = content;
831
    else
832
        av_free(content);
833

    
834
    if (rt->seq != reply->seq) {
835
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
836
            rt->seq, reply->seq);
837
    }
838

    
839
    /* EOS */
840
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
841
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
842
        reply->notice == 2306 /* Continuous Feed Terminated */) {
843
        rt->state = RTSP_STATE_IDLE;
844
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
845
        return AVERROR(EIO); /* data or server error */
846
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
847
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
848
        return AVERROR(EPERM);
849

    
850
    return 0;
851
}
852

    
853
int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
854
                                        const char *method, const char *url,
855
                                        const char *headers,
856
                                        const unsigned char *send_content,
857
                                        int send_content_length)
858
{
859
    RTSPState *rt = s->priv_data;
860
    char buf[4096], *out_buf;
861
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
862

    
863
    /* Add in RTSP headers */
864
    out_buf = buf;
865
    rt->seq++;
866
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
867
    if (headers)
868
        av_strlcat(buf, headers, sizeof(buf));
869
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
870
    if (rt->session_id[0] != '\0' && (!headers ||
871
        !strstr(headers, "\nIf-Match:"))) {
872
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
873
    }
874
    if (rt->auth[0]) {
875
        char *str = ff_http_auth_create_response(&rt->auth_state,
876
                                                 rt->auth, url, method);
877
        if (str)
878
            av_strlcat(buf, str, sizeof(buf));
879
        av_free(str);
880
    }
881
    if (send_content_length > 0 && send_content)
882
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
883
    av_strlcat(buf, "\r\n", sizeof(buf));
884

    
885
    /* base64 encode rtsp if tunneling */
886
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
887
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
888
        out_buf = base64buf;
889
    }
890

    
891
    dprintf(s, "Sending:\n%s--\n", buf);
892

    
893
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
894
    if (send_content_length > 0 && send_content) {
895
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
896
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
897
                                    "with content data not supported\n");
898
            return AVERROR_PATCHWELCOME;
899
        }
900
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
901
    }
902
    rt->last_cmd_time = av_gettime();
903

    
904
    return 0;
905
}
906

    
907
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
908
                           const char *url, const char *headers)
909
{
910
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
911
}
912

    
913
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
914
                     const char *headers, RTSPMessageHeader *reply,
915
                     unsigned char **content_ptr)
916
{
917
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
918
                                         content_ptr, NULL, 0);
919
}
920

    
921
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
922
                                  const char *method, const char *url,
923
                                  const char *header,
924
                                  RTSPMessageHeader *reply,
925
                                  unsigned char **content_ptr,
926
                                  const unsigned char *send_content,
927
                                  int send_content_length)
928
{
929
    RTSPState *rt = s->priv_data;
930
    HTTPAuthType cur_auth_type;
931
    int ret;
932

    
933
retry:
934
    cur_auth_type = rt->auth_state.auth_type;
935
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
936
                                                   send_content,
937
                                                   send_content_length)))
938
        return ret;
939

    
940
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
941
        return ret;
942

    
943
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
944
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
945
        goto retry;
946

    
947
    if (reply->status_code > 400){
948
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
949
               method,
950
               reply->status_code,
951
               reply->reason);
952
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
953
    }
954

    
955
    return 0;
956
}
957

    
958
/**
959
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
960
 */
961
static int make_setup_request(AVFormatContext *s, const char *host, int port,
962
                              int lower_transport, const char *real_challenge)
963
{
964
    RTSPState *rt = s->priv_data;
965
    int rtx, j, i, err, interleave = 0;
966
    RTSPStream *rtsp_st;
967
    RTSPMessageHeader reply1, *reply = &reply1;
968
    char cmd[2048];
969
    const char *trans_pref;
970

    
971
    if (rt->transport == RTSP_TRANSPORT_RDT)
972
        trans_pref = "x-pn-tng";
973
    else
974
        trans_pref = "RTP/AVP";
975

    
976
    /* default timeout: 1 minute */
977
    rt->timeout = 60;
978

    
979
    /* for each stream, make the setup request */
980
    /* XXX: we assume the same server is used for the control of each
981
     * RTSP stream */
982

    
983
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
984
        char transport[2048];
985

    
986
        /**
987
         * WMS serves all UDP data over a single connection, the RTX, which
988
         * isn't necessarily the first in the SDP but has to be the first
989
         * to be set up, else the second/third SETUP will fail with a 461.
990
         */
991
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
992
             rt->server_type == RTSP_SERVER_WMS) {
993
            if (i == 0) {
994
                /* rtx first */
995
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
996
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
997
                    if (len >= 4 &&
998
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
999
                                "/rtx"))
1000
                        break;
1001
                }
1002
                if (rtx == rt->nb_rtsp_streams)
1003
                    return -1; /* no RTX found */
1004
                rtsp_st = rt->rtsp_streams[rtx];
1005
            } else
1006
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1007
        } else
1008
            rtsp_st = rt->rtsp_streams[i];
1009

    
1010
        /* RTP/UDP */
1011
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1012
            char buf[256];
1013

    
1014
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1015
                port = reply->transports[0].client_port_min;
1016
                goto have_port;
1017
            }
1018

    
1019
            /* first try in specified port range */
1020
            if (RTSP_RTP_PORT_MIN != 0) {
1021
                while (j <= RTSP_RTP_PORT_MAX) {
1022
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1023
                                "?localport=%d", j);
1024
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1025
                    j += 2;
1026
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1027
                        goto rtp_opened;
1028
                }
1029
            }
1030

    
1031
#if 0
1032
            /* then try on any port */
1033
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1034
                err = AVERROR_INVALIDDATA;
1035
                goto fail;
1036
            }
1037
#endif
1038

    
1039
        rtp_opened:
1040
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1041
        have_port:
1042
            snprintf(transport, sizeof(transport) - 1,
1043
                     "%s/UDP;", trans_pref);
1044
            if (rt->server_type != RTSP_SERVER_REAL)
1045
                av_strlcat(transport, "unicast;", sizeof(transport));
1046
            av_strlcatf(transport, sizeof(transport),
1047
                     "client_port=%d", port);
1048
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1049
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1050
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1051
        }
1052

    
1053
        /* RTP/TCP */
1054
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1055
            /** For WMS streams, the application streams are only used for
1056
             * UDP. When trying to set it up for TCP streams, the server
1057
             * will return an error. Therefore, we skip those streams. */
1058
            if (rt->server_type == RTSP_SERVER_WMS &&
1059
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1060
                    AVMEDIA_TYPE_DATA)
1061
                continue;
1062
            snprintf(transport, sizeof(transport) - 1,
1063
                     "%s/TCP;", trans_pref);
1064
            if (rt->server_type == RTSP_SERVER_WMS)
1065
                av_strlcat(transport, "unicast;", sizeof(transport));
1066
            av_strlcatf(transport, sizeof(transport),
1067
                        "interleaved=%d-%d",
1068
                        interleave, interleave + 1);
1069
            interleave += 2;
1070
        }
1071

    
1072
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1073
            snprintf(transport, sizeof(transport) - 1,
1074
                     "%s/UDP;multicast", trans_pref);
1075
        }
1076
        if (s->oformat) {
1077
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1078
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1079
                   rt->server_type == RTSP_SERVER_WMS)
1080
            av_strlcat(transport, ";mode=play", sizeof(transport));
1081
        snprintf(cmd, sizeof(cmd),
1082
                 "Transport: %s\r\n",
1083
                 transport);
1084
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1085
            char real_res[41], real_csum[9];
1086
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1087
                                              real_challenge);
1088
            av_strlcatf(cmd, sizeof(cmd),
1089
                        "If-Match: %s\r\n"
1090
                        "RealChallenge2: %s, sd=%s\r\n",
1091
                        rt->session_id, real_res, real_csum);
1092
        }
1093
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1094
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1095
            err = 1;
1096
            goto fail;
1097
        } else if (reply->status_code != RTSP_STATUS_OK ||
1098
                   reply->nb_transports != 1) {
1099
            err = AVERROR_INVALIDDATA;
1100
            goto fail;
1101
        }
1102

    
1103
        /* XXX: same protocol for all streams is required */
1104
        if (i > 0) {
1105
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1106
                reply->transports[0].transport != rt->transport) {
1107
                err = AVERROR_INVALIDDATA;
1108
                goto fail;
1109
            }
1110
        } else {
1111
            rt->lower_transport = reply->transports[0].lower_transport;
1112
            rt->transport = reply->transports[0].transport;
1113
        }
1114

    
1115
        /* Fail if the server responded with another lower transport mode
1116
         * than what we requested. */
1117
        if (reply->transports[0].lower_transport != lower_transport) {
1118
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1119
            err = AVERROR_INVALIDDATA;
1120
            goto fail;
1121
        }
1122

    
1123
        switch(reply->transports[0].lower_transport) {
1124
        case RTSP_LOWER_TRANSPORT_TCP:
1125
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1126
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1127
            break;
1128

    
1129
        case RTSP_LOWER_TRANSPORT_UDP: {
1130
            char url[1024];
1131

    
1132
            /* Use source address if specified */
1133
            if (reply->transports[0].source[0]) {
1134
                ff_url_join(url, sizeof(url), "rtp", NULL,
1135
                            reply->transports[0].source,
1136
                            reply->transports[0].server_port_min, NULL);
1137
            } else {
1138
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1139
                            reply->transports[0].server_port_min, NULL);
1140
            }
1141
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1142
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1143
                err = AVERROR_INVALIDDATA;
1144
                goto fail;
1145
            }
1146
            /* Try to initialize the connection state in a
1147
             * potential NAT router by sending dummy packets.
1148
             * RTP/RTCP dummy packets are used for RDT, too.
1149
             */
1150
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1151
                CONFIG_RTPDEC)
1152
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1153
            break;
1154
        }
1155
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1156
            char url[1024], namebuf[50];
1157
            struct sockaddr_storage addr;
1158
            int port, ttl;
1159

    
1160
            if (reply->transports[0].destination.ss_family) {
1161
                addr      = reply->transports[0].destination;
1162
                port      = reply->transports[0].port_min;
1163
                ttl       = reply->transports[0].ttl;
1164
            } else {
1165
                addr      = rtsp_st->sdp_ip;
1166
                port      = rtsp_st->sdp_port;
1167
                ttl       = rtsp_st->sdp_ttl;
1168
            }
1169
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1170
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1171
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1172
                        port, "?ttl=%d", ttl);
1173
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1174
                err = AVERROR_INVALIDDATA;
1175
                goto fail;
1176
            }
1177
            break;
1178
        }
1179
        }
1180

    
1181
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1182
            goto fail;
1183
    }
1184

    
1185
    if (reply->timeout > 0)
1186
        rt->timeout = reply->timeout;
1187

    
1188
    if (rt->server_type == RTSP_SERVER_REAL)
1189
        rt->need_subscription = 1;
1190

    
1191
    return 0;
1192

    
1193
fail:
1194
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1195
        if (rt->rtsp_streams[i]->rtp_handle) {
1196
            url_close(rt->rtsp_streams[i]->rtp_handle);
1197
            rt->rtsp_streams[i]->rtp_handle = NULL;
1198
        }
1199
    }
1200
    return err;
1201
}
1202

    
1203
void ff_rtsp_close_connections(AVFormatContext *s)
1204
{
1205
    RTSPState *rt = s->priv_data;
1206
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1207
    url_close(rt->rtsp_hd);
1208
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1209
}
1210

    
1211
int ff_rtsp_connect(AVFormatContext *s)
1212
{
1213
    RTSPState *rt = s->priv_data;
1214
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1215
    char *option_list, *option, *filename;
1216
    int port, err, tcp_fd;
1217
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1218
    int lower_transport_mask = 0;
1219
    char real_challenge[64];
1220
    struct sockaddr_storage peer;
1221
    socklen_t peer_len = sizeof(peer);
1222

    
1223
    if (!ff_network_init())
1224
        return AVERROR(EIO);
1225
redirect:
1226
    rt->control_transport = RTSP_MODE_PLAIN;
1227
    /* extract hostname and port */
1228
    av_url_split(NULL, 0, auth, sizeof(auth),
1229
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1230
    if (*auth) {
1231
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1232
    }
1233
    if (port < 0)
1234
        port = RTSP_DEFAULT_PORT;
1235

    
1236
    /* search for options */
1237
    option_list = strrchr(path, '?');
1238
    if (option_list) {
1239
        /* Strip out the RTSP specific options, write out the rest of
1240
         * the options back into the same string. */
1241
        filename = option_list;
1242
        while (option_list) {
1243
            /* move the option pointer */
1244
            option = ++option_list;
1245
            option_list = strchr(option_list, '&');
1246
            if (option_list)
1247
                *option_list = 0;
1248

    
1249
            /* handle the options */
1250
            if (!strcmp(option, "udp")) {
1251
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1252
            } else if (!strcmp(option, "multicast")) {
1253
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1254
            } else if (!strcmp(option, "tcp")) {
1255
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1256
            } else if(!strcmp(option, "http")) {
1257
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1258
                rt->control_transport = RTSP_MODE_TUNNEL;
1259
            } else {
1260
                /* Write options back into the buffer, using memmove instead
1261
                 * of strcpy since the strings may overlap. */
1262
                int len = strlen(option);
1263
                memmove(++filename, option, len);
1264
                filename += len;
1265
                if (option_list) *filename = '&';
1266
            }
1267
        }
1268
        *filename = 0;
1269
    }
1270

    
1271
    if (!lower_transport_mask)
1272
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1273

    
1274
    if (s->oformat) {
1275
        /* Only UDP or TCP - UDP multicast isn't supported. */
1276
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1277
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1278
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1279
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1280
                                    "only UDP and TCP are supported for output.\n");
1281
            err = AVERROR(EINVAL);
1282
            goto fail;
1283
        }
1284
    }
1285

    
1286
    /* Construct the URI used in request; this is similar to s->filename,
1287
     * but with authentication credentials removed and RTSP specific options
1288
     * stripped out. */
1289
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1290
                host, port, "%s", path);
1291

    
1292
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1293
        /* set up initial handshake for tunneling */
1294
        char httpname[1024];
1295
        char sessioncookie[17];
1296
        char headers[1024];
1297

    
1298
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1299
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1300
                 av_get_random_seed(), av_get_random_seed());
1301

    
1302
        /* GET requests */
1303
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1304
            err = AVERROR(EIO);
1305
            goto fail;
1306
        }
1307

    
1308
        /* generate GET headers */
1309
        snprintf(headers, sizeof(headers),
1310
                 "x-sessioncookie: %s\r\n"
1311
                 "Accept: application/x-rtsp-tunnelled\r\n"
1312
                 "Pragma: no-cache\r\n"
1313
                 "Cache-Control: no-cache\r\n",
1314
                 sessioncookie);
1315
        ff_http_set_headers(rt->rtsp_hd, headers);
1316

    
1317
        /* complete the connection */
1318
        if (url_connect(rt->rtsp_hd)) {
1319
            err = AVERROR(EIO);
1320
            goto fail;
1321
        }
1322

    
1323
        /* POST requests */
1324
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1325
            err = AVERROR(EIO);
1326
            goto fail;
1327
        }
1328

    
1329
        /* generate POST headers */
1330
        snprintf(headers, sizeof(headers),
1331
                 "x-sessioncookie: %s\r\n"
1332
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1333
                 "Pragma: no-cache\r\n"
1334
                 "Cache-Control: no-cache\r\n"
1335
                 "Content-Length: 32767\r\n"
1336
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1337
                 sessioncookie);
1338
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1339
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1340

    
1341
        /* Initialize the authentication state for the POST session. The HTTP
1342
         * protocol implementation doesn't properly handle multi-pass
1343
         * authentication for POST requests, since it would require one of
1344
         * the following:
1345
         * - implementing Expect: 100-continue, which many HTTP servers
1346
         *   don't support anyway, even less the RTSP servers that do HTTP
1347
         *   tunneling
1348
         * - sending the whole POST data until getting a 401 reply specifying
1349
         *   what authentication method to use, then resending all that data
1350
         * - waiting for potential 401 replies directly after sending the
1351
         *   POST header (waiting for some unspecified time)
1352
         * Therefore, we copy the full auth state, which works for both basic
1353
         * and digest. (For digest, we would have to synchronize the nonce
1354
         * count variable between the two sessions, if we'd do more requests
1355
         * with the original session, though.)
1356
         */
1357
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1358

    
1359
        /* complete the connection */
1360
        if (url_connect(rt->rtsp_hd_out)) {
1361
            err = AVERROR(EIO);
1362
            goto fail;
1363
        }
1364
    } else {
1365
        /* open the tcp connection */
1366
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1367
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1368
            err = AVERROR(EIO);
1369
            goto fail;
1370
        }
1371
        rt->rtsp_hd_out = rt->rtsp_hd;
1372
    }
1373
    rt->seq = 0;
1374

    
1375
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1376
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1377
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1378
                    NULL, 0, NI_NUMERICHOST);
1379
    }
1380

    
1381
    /* request options supported by the server; this also detects server
1382
     * type */
1383
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1384
        cmd[0] = 0;
1385
        if (rt->server_type == RTSP_SERVER_REAL)
1386
            av_strlcat(cmd,
1387
                       /**
1388
                        * The following entries are required for proper
1389
                        * streaming from a Realmedia server. They are
1390
                        * interdependent in some way although we currently
1391
                        * don't quite understand how. Values were copied
1392
                        * from mplayer SVN r23589.
1393
                        * @param CompanyID is a 16-byte ID in base64
1394
                        * @param ClientChallenge is a 16-byte ID in hex
1395
                        */
1396
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1397
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1398
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1399
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1400
                       sizeof(cmd));
1401
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1402
        if (reply->status_code != RTSP_STATUS_OK) {
1403
            err = AVERROR_INVALIDDATA;
1404
            goto fail;
1405
        }
1406

    
1407
        /* detect server type if not standard-compliant RTP */
1408
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1409
            rt->server_type = RTSP_SERVER_REAL;
1410
            continue;
1411
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1412
            rt->server_type = RTSP_SERVER_WMS;
1413
        } else if (rt->server_type == RTSP_SERVER_REAL)
1414
            strcpy(real_challenge, reply->real_challenge);
1415
        break;
1416
    }
1417

    
1418
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1419
        err = ff_rtsp_setup_input_streams(s, reply);
1420
    else if (CONFIG_RTSP_MUXER)
1421
        err = ff_rtsp_setup_output_streams(s, host);
1422
    if (err)
1423
        goto fail;
1424

    
1425
    do {
1426
        int lower_transport = ff_log2_tab[lower_transport_mask &
1427
                                  ~(lower_transport_mask - 1)];
1428

    
1429
        err = make_setup_request(s, host, port, lower_transport,
1430
                                 rt->server_type == RTSP_SERVER_REAL ?
1431
                                     real_challenge : NULL);
1432
        if (err < 0)
1433
            goto fail;
1434
        lower_transport_mask &= ~(1 << lower_transport);
1435
        if (lower_transport_mask == 0 && err == 1) {
1436
            err = FF_NETERROR(EPROTONOSUPPORT);
1437
            goto fail;
1438
        }
1439
    } while (err);
1440

    
1441
    rt->state = RTSP_STATE_IDLE;
1442
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1443
    return 0;
1444
 fail:
1445
    ff_rtsp_close_streams(s);
1446
    ff_rtsp_close_connections(s);
1447
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1448
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1449
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1450
               reply->status_code,
1451
               s->filename);
1452
        goto redirect;
1453
    }
1454
    ff_network_close();
1455
    return err;
1456
}
1457
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1458

    
1459
#if CONFIG_RTPDEC
1460
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1461
                           uint8_t *buf, int buf_size, int64_t wait_end)
1462
{
1463
    RTSPState *rt = s->priv_data;
1464
    RTSPStream *rtsp_st;
1465
    fd_set rfds;
1466
    int fd, fd_rtcp, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1467
    struct timeval tv;
1468

    
1469
    for (;;) {
1470
        if (url_interrupt_cb())
1471
            return AVERROR(EINTR);
1472
        if (wait_end && wait_end - av_gettime() < 0)
1473
            return AVERROR(EAGAIN);
1474
        FD_ZERO(&rfds);
1475
        if (rt->rtsp_hd) {
1476
            tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1477
            FD_SET(tcp_fd, &rfds);
1478
        } else {
1479
            fd_max = 0;
1480
            tcp_fd = -1;
1481
        }
1482
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1483
            rtsp_st = rt->rtsp_streams[i];
1484
            if (rtsp_st->rtp_handle) {
1485
                fd = url_get_file_handle(rtsp_st->rtp_handle);
1486
                fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1487
                if (FFMAX(fd, fd_rtcp) > fd_max)
1488
                    fd_max = FFMAX(fd, fd_rtcp);
1489
                FD_SET(fd, &rfds);
1490
                FD_SET(fd_rtcp, &rfds);
1491
            }
1492
        }
1493
        tv.tv_sec = 0;
1494
        tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1495
        n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1496
        if (n > 0) {
1497
            timeout_cnt = 0;
1498
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1499
                rtsp_st = rt->rtsp_streams[i];
1500
                if (rtsp_st->rtp_handle) {
1501
                    fd = url_get_file_handle(rtsp_st->rtp_handle);
1502
                    fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1503
                    if (FD_ISSET(fd_rtcp, &rfds) || FD_ISSET(fd, &rfds)) {
1504
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1505
                        if (ret > 0) {
1506
                            *prtsp_st = rtsp_st;
1507
                            return ret;
1508
                        }
1509
                    }
1510
                }
1511
            }
1512
#if CONFIG_RTSP_DEMUXER
1513
            if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1514
                RTSPMessageHeader reply;
1515

    
1516
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1517
                if (ret < 0)
1518
                    return ret;
1519
                /* XXX: parse message */
1520
                if (rt->state != RTSP_STATE_STREAMING)
1521
                    return 0;
1522
            }
1523
#endif
1524
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1525
            return FF_NETERROR(ETIMEDOUT);
1526
        } else if (n < 0 && errno != EINTR)
1527
            return AVERROR(errno);
1528
    }
1529
}
1530

    
1531
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1532
{
1533
    RTSPState *rt = s->priv_data;
1534
    int ret, len;
1535
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1536
    int64_t wait_end = 0;
1537

    
1538
    if (rt->nb_byes == rt->nb_rtsp_streams)
1539
        return AVERROR_EOF;
1540

    
1541
    /* get next frames from the same RTP packet */
1542
    if (rt->cur_transport_priv) {
1543
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1544
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1545
        } else
1546
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1547
        if (ret == 0) {
1548
            rt->cur_transport_priv = NULL;
1549
            return 0;
1550
        } else if (ret == 1) {
1551
            return 0;
1552
        } else
1553
            rt->cur_transport_priv = NULL;
1554
    }
1555

    
1556
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1557
        int i;
1558
        int64_t first_queue_time = 0;
1559
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1560
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1561
            int64_t queue_time;
1562
            if (!rtpctx)
1563
                continue;
1564
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1565
            if (queue_time && (queue_time - first_queue_time < 0 ||
1566
                               !first_queue_time)) {
1567
                first_queue_time = queue_time;
1568
                first_queue_st   = rt->rtsp_streams[i];
1569
            }
1570
        }
1571
        if (first_queue_time)
1572
            wait_end = first_queue_time + s->max_delay;
1573
    }
1574

    
1575
    /* read next RTP packet */
1576
 redo:
1577
    if (!rt->recvbuf) {
1578
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1579
        if (!rt->recvbuf)
1580
            return AVERROR(ENOMEM);
1581
    }
1582

    
1583
    switch(rt->lower_transport) {
1584
    default:
1585
#if CONFIG_RTSP_DEMUXER
1586
    case RTSP_LOWER_TRANSPORT_TCP:
1587
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1588
        break;
1589
#endif
1590
    case RTSP_LOWER_TRANSPORT_UDP:
1591
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1592
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1593
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1594
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1595
        break;
1596
    }
1597
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1598
        rt->transport == RTSP_TRANSPORT_RTP) {
1599
        rtsp_st = first_queue_st;
1600
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1601
        goto end;
1602
    }
1603
    if (len < 0)
1604
        return len;
1605
    if (len == 0)
1606
        return AVERROR_EOF;
1607
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1608
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1609
    } else {
1610
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1611
        if (ret < 0) {
1612
            /* Either bad packet, or a RTCP packet. Check if the
1613
             * first_rtcp_ntp_time field was initialized. */
1614
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1615
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1616
                /* first_rtcp_ntp_time has been initialized for this stream,
1617
                 * copy the same value to all other uninitialized streams,
1618
                 * in order to map their timestamp origin to the same ntp time
1619
                 * as this one. */
1620
                int i;
1621
                AVStream *st = NULL;
1622
                if (rtsp_st->stream_index >= 0)
1623
                    st = s->streams[rtsp_st->stream_index];
1624
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1625
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1626
                    AVStream *st2 = NULL;
1627
                    if (rt->rtsp_streams[i]->stream_index >= 0)
1628
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1629
                    if (rtpctx2 && st && st2 &&
1630
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1631
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1632
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
1633
                            rtpctx->rtcp_ts_offset, st->time_base,
1634
                            st2->time_base);
1635
                    }
1636
                }
1637
            }
1638
            if (ret == -RTCP_BYE) {
1639
                rt->nb_byes++;
1640

    
1641
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1642
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1643

    
1644
                if (rt->nb_byes == rt->nb_rtsp_streams)
1645
                    return AVERROR_EOF;
1646
            }
1647
        }
1648
    }
1649
end:
1650
    if (ret < 0)
1651
        goto redo;
1652
    if (ret == 1)
1653
        /* more packets may follow, so we save the RTP context */
1654
        rt->cur_transport_priv = rtsp_st->transport_priv;
1655

    
1656
    return ret;
1657
}
1658
#endif /* CONFIG_RTPDEC */
1659

    
1660
#if CONFIG_SDP_DEMUXER
1661
static int sdp_probe(AVProbeData *p1)
1662
{
1663
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1664

    
1665
    /* we look for a line beginning "c=IN IP" */
1666
    while (p < p_end && *p != '\0') {
1667
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1668
            av_strstart(p, "c=IN IP", NULL))
1669
            return AVPROBE_SCORE_MAX / 2;
1670

    
1671
        while (p < p_end - 1 && *p != '\n') p++;
1672
        if (++p >= p_end)
1673
            break;
1674
        if (*p == '\r')
1675
            p++;
1676
    }
1677
    return 0;
1678
}
1679

    
1680
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1681
{
1682
    RTSPState *rt = s->priv_data;
1683
    RTSPStream *rtsp_st;
1684
    int size, i, err;
1685
    char *content;
1686
    char url[1024];
1687

    
1688
    if (!ff_network_init())
1689
        return AVERROR(EIO);
1690

    
1691
    /* read the whole sdp file */
1692
    /* XXX: better loading */
1693
    content = av_malloc(SDP_MAX_SIZE);
1694
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1695
    if (size <= 0) {
1696
        av_free(content);
1697
        return AVERROR_INVALIDDATA;
1698
    }
1699
    content[size] ='\0';
1700

    
1701
    ff_sdp_parse(s, content);
1702
    av_free(content);
1703

    
1704
    /* open each RTP stream */
1705
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1706
        char namebuf[50];
1707
        rtsp_st = rt->rtsp_streams[i];
1708

    
1709
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1710
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1711
        ff_url_join(url, sizeof(url), "rtp", NULL,
1712
                    namebuf, rtsp_st->sdp_port,
1713
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1714
                    rtsp_st->sdp_ttl);
1715
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1716
            err = AVERROR_INVALIDDATA;
1717
            goto fail;
1718
        }
1719
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1720
            goto fail;
1721
    }
1722
    return 0;
1723
fail:
1724
    ff_rtsp_close_streams(s);
1725
    ff_network_close();
1726
    return err;
1727
}
1728

    
1729
static int sdp_read_close(AVFormatContext *s)
1730
{
1731
    ff_rtsp_close_streams(s);
1732
    ff_network_close();
1733
    return 0;
1734
}
1735

    
1736
AVInputFormat sdp_demuxer = {
1737
    "sdp",
1738
    NULL_IF_CONFIG_SMALL("SDP"),
1739
    sizeof(RTSPState),
1740
    sdp_probe,
1741
    sdp_read_header,
1742
    ff_rtsp_fetch_packet,
1743
    sdp_read_close,
1744
};
1745
#endif /* CONFIG_SDP_DEMUXER */
1746

    
1747
#if CONFIG_RTP_DEMUXER
1748
static int rtp_probe(AVProbeData *p)
1749
{
1750
    if (av_strstart(p->filename, "rtp:", NULL))
1751
        return AVPROBE_SCORE_MAX;
1752
    return 0;
1753
}
1754

    
1755
static int rtp_read_header(AVFormatContext *s,
1756
                           AVFormatParameters *ap)
1757
{
1758
    uint8_t recvbuf[1500];
1759
    char host[500], sdp[500];
1760
    int ret, port;
1761
    URLContext* in = NULL;
1762
    int payload_type;
1763
    AVCodecContext codec;
1764
    struct sockaddr_storage addr;
1765
    ByteIOContext pb;
1766
    socklen_t addrlen = sizeof(addr);
1767

    
1768
    if (!ff_network_init())
1769
        return AVERROR(EIO);
1770

    
1771
    ret = url_open(&in, s->filename, URL_RDONLY);
1772
    if (ret)
1773
        goto fail;
1774

    
1775
    while (1) {
1776
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1777
        if (ret == AVERROR(EAGAIN))
1778
            continue;
1779
        if (ret < 0)
1780
            goto fail;
1781
        if (ret < 12) {
1782
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1783
            continue;
1784
        }
1785

    
1786
        if ((recvbuf[0] & 0xc0) != 0x80) {
1787
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1788
                                      "received\n");
1789
            continue;
1790
        }
1791

    
1792
        payload_type = recvbuf[1] & 0x7f;
1793
        break;
1794
    }
1795
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1796
    url_close(in);
1797
    in = NULL;
1798

    
1799
    memset(&codec, 0, sizeof(codec));
1800
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1801
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1802
                                "without an SDP file describing it\n",
1803
                                 payload_type);
1804
        goto fail;
1805
    }
1806
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1807
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1808
                                  "properly you need an SDP file "
1809
                                  "describing it\n");
1810
    }
1811

    
1812
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1813
                 NULL, 0, s->filename);
1814

    
1815
    snprintf(sdp, sizeof(sdp),
1816
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1817
             addr.ss_family == AF_INET ? 4 : 6, host,
1818
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1819
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1820
             port, payload_type);
1821
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1822

    
1823
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1824
    s->pb = &pb;
1825

    
1826
    /* sdp_read_header initializes this again */
1827
    ff_network_close();
1828

    
1829
    ret = sdp_read_header(s, ap);
1830
    s->pb = NULL;
1831
    return ret;
1832

    
1833
fail:
1834
    if (in)
1835
        url_close(in);
1836
    ff_network_close();
1837
    return ret;
1838
}
1839

    
1840
AVInputFormat rtp_demuxer = {
1841
    "rtp",
1842
    NULL_IF_CONFIG_SMALL("RTP input format"),
1843
    sizeof(RTSPState),
1844
    rtp_probe,
1845
    rtp_read_header,
1846
    ff_rtsp_fetch_packet,
1847
    sdp_read_close,
1848
    .flags = AVFMT_NOFILE,
1849
};
1850
#endif /* CONFIG_RTP_DEMUXER */
1851