rtsp.c 86.9 KB
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/*
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 * RTSP/SDP client
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 * Copyright (c) 2002 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * 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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 */
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#include "libavutil/avassert.h"
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#include "libavutil/base64.h"
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#include "libavutil/avstring.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/random_seed.h"
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#include "libavutil/dict.h"
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#include "libavutil/opt.h"
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#include "libavutil/time.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#if HAVE_POLL_H
#include <poll.h>
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#endif
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#include "internal.h"
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#include "network.h"
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#include "os_support.h"
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#include "http.h"
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#include "rtsp.h"
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#include "rtpdec.h"
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#include "rtpproto.h"
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#include "rdt.h"
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#include "rtpdec_formats.h"
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#include "rtpenc_chain.h"
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#include "url.h"
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#include "rtpenc.h"
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#include "mpegts.h"
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/* Timeout values for socket poll, in ms,
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 * and read_packet(), in seconds  */
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#define POLL_TIMEOUT_MS 100
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#define READ_PACKET_TIMEOUT_S 10
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#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
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#define SDP_MAX_SIZE 16384
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#define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
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#define DEFAULT_REORDERING_DELAY 100000
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#define OFFSET(x) offsetof(RTSPState, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
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#define ENC AV_OPT_FLAG_ENCODING_PARAM
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#define RTSP_FLAG_OPTS(name, longname) \
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    { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
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    { "filter_src", "Only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
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#define RTSP_MEDIATYPE_OPTS(name, longname) \
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    { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
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    { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
    { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
    { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }
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#define RTSP_REORDERING_OPTS() \
    { "reorder_queue_size", "Number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC }

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const AVOption ff_rtsp_options[] = {
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    { "initial_pause",  "Don't start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC },
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    FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
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    { "rtsp_transport", "RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
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    { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
    { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
    { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
    { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
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    RTSP_FLAG_OPTS("rtsp_flags", "RTSP flags"),
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    { "listen", "Wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" },
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    RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
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    { "min_port", "Minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
    { "max_port", "Maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
    { "timeout", "Maximum timeout (in seconds) to wait for incoming connections. -1 is infinite. Implies flag listen", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC },
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    { "stimeout", "timeout (in micro seconds) of socket i/o operations.", OFFSET(stimeout), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC },
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    RTSP_REORDERING_OPTS(),
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    { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
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    { NULL },
};

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static const AVOption sdp_options[] = {
    RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
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    { "custom_io", "Use custom IO", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" },
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    { "rtcp_to_source", "Send RTCP packets to the source address of received packets", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_RTCP_TO_SOURCE}, 0, 0, DEC, "rtsp_flags" },
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    RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
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    RTSP_REORDERING_OPTS(),
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    { NULL },
};

static const AVOption rtp_options[] = {
    RTSP_FLAG_OPTS("rtp_flags", "RTP flags"),
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    RTSP_REORDERING_OPTS(),
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    { NULL },
};

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static void get_word_until_chars(char *buf, int buf_size,
                                 const char *sep, const char **pp)
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{
    const char *p;
    char *q;

    p = *pp;
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    p += strspn(p, SPACE_CHARS);
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    q = buf;
    while (!strchr(sep, *p) && *p != '\0') {
        if ((q - buf) < buf_size - 1)
            *q++ = *p;
        p++;
    }
    if (buf_size > 0)
        *q = '\0';
    *pp = p;
}

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static void get_word_sep(char *buf, int buf_size, const char *sep,
                         const char **pp)
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{
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    if (**pp == '/') (*pp)++;
    get_word_until_chars(buf, buf_size, sep, pp);
}
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static void get_word(char *buf, int buf_size, const char **pp)
{
    get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
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}

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

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

    *start = AV_NOPTS_VALUE;
    *end = AV_NOPTS_VALUE;

    get_word_sep(buf, sizeof(buf), "-", &p);
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    av_parse_time(start, buf, 1);
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    if (*p == '-') {
        p++;
        get_word_sep(buf, sizeof(buf), "-", &p);
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        av_parse_time(end, buf, 1);
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    }
}

static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
{
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    struct addrinfo hints = { 0 }, *ai = NULL;
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    hints.ai_flags = AI_NUMERICHOST;
    if (getaddrinfo(buf, NULL, &hints, &ai))
        return -1;
    memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
    freeaddrinfo(ai);
    return 0;
}

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#if CONFIG_RTPDEC
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static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
                             RTSPStream *rtsp_st, AVCodecContext *codec)
{
    if (!handler)
        return;
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    if (codec)
        codec->codec_id          = handler->codec_id;
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    rtsp_st->dynamic_handler = handler;
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    if (handler->alloc) {
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        rtsp_st->dynamic_protocol_context = handler->alloc();
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        if (!rtsp_st->dynamic_protocol_context)
            rtsp_st->dynamic_handler = NULL;
    }
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}

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/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
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static int sdp_parse_rtpmap(AVFormatContext *s,
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                            AVStream *st, RTSPStream *rtsp_st,
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                            int payload_type, const char *p)
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{
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    AVCodecContext *codec = st->codec;
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    char buf[256];
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    int i;
    AVCodec *c;
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    const char *c_name;
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    /* See if we can handle this kind of payload.
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     * The space should normally not be there but some Real streams or
     * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
     * have a trailing space. */
    get_word_sep(buf, sizeof(buf), "/ ", &p);
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    if (payload_type < RTP_PT_PRIVATE) {
        /* We are in a standard case
         * (from http://www.iana.org/assignments/rtp-parameters). */
        codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
    }

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    if (codec->codec_id == AV_CODEC_ID_NONE) {
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        RTPDynamicProtocolHandler *handler =
            ff_rtp_handler_find_by_name(buf, codec->codec_type);
        init_rtp_handler(handler, rtsp_st, codec);
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        /* If no dynamic handler was found, check with the list of standard
         * allocated types, if such a stream for some reason happens to
         * use a private payload type. This isn't handled in rtpdec.c, since
         * the format name from the rtpmap line never is passed into rtpdec. */
        if (!rtsp_st->dynamic_handler)
            codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
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    }

    c = avcodec_find_decoder(codec->codec_id);
    if (c && c->name)
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        c_name = c->name;
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    else
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        c_name = "(null)";
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    get_word_sep(buf, sizeof(buf), "/", &p);
    i = atoi(buf);
    switch (codec->codec_type) {
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    case AVMEDIA_TYPE_AUDIO:
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        av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
        codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
        codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
        if (i > 0) {
            codec->sample_rate = i;
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            avpriv_set_pts_info(st, 32, 1, codec->sample_rate);
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            get_word_sep(buf, sizeof(buf), "/", &p);
            i = atoi(buf);
            if (i > 0)
                codec->channels = i;
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        }
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        av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
               codec->sample_rate);
        av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
               codec->channels);
        break;
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    case AVMEDIA_TYPE_VIDEO:
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        av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
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        if (i > 0)
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            avpriv_set_pts_info(st, 32, 1, i);
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        break;
    default:
        break;
    }
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    if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init)
        rtsp_st->dynamic_handler->init(s, st->index,
                                       rtsp_st->dynamic_protocol_context);
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    return 0;
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}

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/* parse the attribute line from the fmtp a line of an sdp response. This
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 * is broken out as a function because it is used in rtp_h264.c, which is
 * forthcoming. */
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int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
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                                char *value, int value_size)
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{
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    *p += strspn(*p, SPACE_CHARS);
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    if (**p) {
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        get_word_sep(attr, attr_size, "=", p);
        if (**p == '=')
            (*p)++;
        get_word_sep(value, value_size, ";", p);
        if (**p == ';')
            (*p)++;
        return 1;
    }
    return 0;
}

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typedef struct SDPParseState {
    /* SDP only */
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    struct sockaddr_storage default_ip;
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    int            default_ttl;
    int            skip_media;  ///< set if an unknown m= line occurs
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    int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
    struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
    int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
    struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
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} SDPParseState;

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static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
                                      struct RTSPSource ***dest, int *dest_count)
{
    RTSPSource *rtsp_src, *rtsp_src2;
    int i;
    for (i = 0; i < count; i++) {
        rtsp_src = addrs[i];
        rtsp_src2 = av_malloc(sizeof(*rtsp_src2));
        if (!rtsp_src2)
            continue;
        memcpy(rtsp_src2, rtsp_src, sizeof(*rtsp_src));
        dynarray_add(dest, dest_count, rtsp_src2);
    }
}

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static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
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                           int letter, const char *buf)
{
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    RTSPState *rt = s->priv_data;
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    char buf1[64], st_type[64];
    const char *p;
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    enum AVMediaType codec_type;
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    int payload_type, i;
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    AVStream *st;
    RTSPStream *rtsp_st;
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    RTSPSource *rtsp_src;
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    struct sockaddr_storage sdp_ip;
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    int ttl;

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    av_dlog(s, "sdp: %c='%s'\n", letter, buf);
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    p = buf;
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    if (s1->skip_media && letter != 'm')
        return;
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    switch (letter) {
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    case 'c':
        get_word(buf1, sizeof(buf1), &p);
        if (strcmp(buf1, "IN") != 0)
            return;
        get_word(buf1, sizeof(buf1), &p);
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        if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
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            return;
        get_word_sep(buf1, sizeof(buf1), "/", &p);
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        if (get_sockaddr(buf1, &sdp_ip))
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            return;
        ttl = 16;
        if (*p == '/') {
            p++;
            get_word_sep(buf1, sizeof(buf1), "/", &p);
            ttl = atoi(buf1);
        }
        if (s->nb_streams == 0) {
            s1->default_ip = sdp_ip;
            s1->default_ttl = ttl;
        } else {
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            rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
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            rtsp_st->sdp_ip = sdp_ip;
            rtsp_st->sdp_ttl = ttl;
        }
        break;
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    case 's':
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        av_dict_set(&s->metadata, "title", p, 0);
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        break;
    case 'i':
        if (s->nb_streams == 0) {
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            av_dict_set(&s->metadata, "comment", p, 0);
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            break;
        }
        break;
    case 'm':
        /* new stream */
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        s1->skip_media = 0;
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        codec_type = AVMEDIA_TYPE_UNKNOWN;
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        get_word(st_type, sizeof(st_type), &p);
        if (!strcmp(st_type, "audio")) {
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            codec_type = AVMEDIA_TYPE_AUDIO;
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        } else if (!strcmp(st_type, "video")) {
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            codec_type = AVMEDIA_TYPE_VIDEO;
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        } else if (!strcmp(st_type, "application")) {
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            codec_type = AVMEDIA_TYPE_DATA;
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        }
        if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
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            s1->skip_media = 1;
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            return;
        }
        rtsp_st = av_mallocz(sizeof(RTSPStream));
        if (!rtsp_st)
            return;
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        rtsp_st->stream_index = -1;
        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
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        rtsp_st->sdp_ip = s1->default_ip;
        rtsp_st->sdp_ttl = s1->default_ttl;

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        copy_default_source_addrs(s1->default_include_source_addrs,
                                  s1->nb_default_include_source_addrs,
                                  &rtsp_st->include_source_addrs,
                                  &rtsp_st->nb_include_source_addrs);
        copy_default_source_addrs(s1->default_exclude_source_addrs,
                                  s1->nb_default_exclude_source_addrs,
                                  &rtsp_st->exclude_source_addrs,
                                  &rtsp_st->nb_exclude_source_addrs);

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

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        get_word(buf1, sizeof(buf1), &p); /* protocol */
        if (!strcmp(buf1, "udp"))
            rt->transport = RTSP_TRANSPORT_RAW;
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        else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
            rtsp_st->feedback = 1;
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        /* XXX: handle list of formats */
        get_word(buf1, sizeof(buf1), &p); /* format list */
        rtsp_st->sdp_payload_type = atoi(buf1);

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        if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
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            /* no corresponding stream */
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            if (rt->transport == RTSP_TRANSPORT_RAW) {
                if (!rt->ts && CONFIG_RTPDEC)
                    rt->ts = ff_mpegts_parse_open(s);
            } else {
                RTPDynamicProtocolHandler *handler;
                handler = ff_rtp_handler_find_by_id(
                              rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
                init_rtp_handler(handler, rtsp_st, NULL);
                if (handler && handler->init)
                    handler->init(s, -1, rtsp_st->dynamic_protocol_context);
            }
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        } else if (rt->server_type == RTSP_SERVER_WMS &&
                   codec_type == AVMEDIA_TYPE_DATA) {
            /* RTX stream, a stream that carries all the other actual
             * audio/video streams. Don't expose this to the callers. */
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        } else {
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            st = avformat_new_stream(s, NULL);
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            if (!st)
                return;
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            st->id = rt->nb_rtsp_streams - 1;
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            rtsp_st->stream_index = st->index;
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            st->codec->codec_type = codec_type;
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            if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
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                RTPDynamicProtocolHandler *handler;
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                /* if standard payload type, we can find the codec right now */
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                ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
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                if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
                    st->codec->sample_rate > 0)
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                    avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
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                /* Even static payload types may need a custom depacketizer */
                handler = ff_rtp_handler_find_by_id(
                              rtsp_st->sdp_payload_type, st->codec->codec_type);
                init_rtp_handler(handler, rtsp_st, st->codec);
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                if (handler && handler->init)
                    handler->init(s, st->index,
                                  rtsp_st->dynamic_protocol_context);
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            }
        }
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        /* put a default control url */
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        av_strlcpy(rtsp_st->control_url, rt->control_uri,
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                   sizeof(rtsp_st->control_url));
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        break;
    case 'a':
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        if (av_strstart(p, "control:", &p)) {
            if (s->nb_streams == 0) {
                if (!strncmp(p, "rtsp://", 7))
                    av_strlcpy(rt->control_uri, p,
                               sizeof(rt->control_uri));
            } else {
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                char proto[32];
                /* get the control url */
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                rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
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                /* XXX: may need to add full url resolution */
                av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
                             NULL, NULL, 0, p);
                if (proto[0] == '\0') {
                    /* relative control URL */
                    if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
                    av_strlcat(rtsp_st->control_url, "/",
                               sizeof(rtsp_st->control_url));
                    av_strlcat(rtsp_st->control_url, p,
                               sizeof(rtsp_st->control_url));
                } else
                    av_strlcpy(rtsp_st->control_url, p,
                               sizeof(rtsp_st->control_url));
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            }
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        } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
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            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
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            get_word(buf1, sizeof(buf1), &p);
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            payload_type = atoi(buf1);
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            rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
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            if (rtsp_st->stream_index >= 0) {
                st = s->streams[rtsp_st->stream_index];
                sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
            }
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        } else if (av_strstart(p, "fmtp:", &p) ||
                   av_strstart(p, "framesize:", &p)) {
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            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
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            // let dynamic protocol handlers have a stab at the line.
            get_word(buf1, sizeof(buf1), &p);
            payload_type = atoi(buf1);
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            for (i = 0; i < rt->nb_rtsp_streams; i++) {
                rtsp_st = rt->rtsp_streams[i];
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                if (rtsp_st->sdp_payload_type == payload_type &&
                    rtsp_st->dynamic_handler &&
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
                        rtsp_st->dynamic_protocol_context, buf);
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            }
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        } else if (av_strstart(p, "range:", &p)) {
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            int64_t start, end;

            // this is so that seeking on a streamed file can work.
            rtsp_parse_range_npt(p, &start, &end);
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            s->start_time = start;
            /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
            s->duration   = (end == AV_NOPTS_VALUE) ?
                            AV_NOPTS_VALUE : end - start;
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        } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
            if (atoi(p) == 1)
                rt->transport = RTSP_TRANSPORT_RDT;
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        } else if (av_strstart(p, "SampleRate:integer;", &p) &&
                   s->nb_streams > 0) {
            st = s->streams[s->nb_streams - 1];
            st->codec->sample_rate = atoi(p);
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        } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
            // RFC 4568
            rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
            get_word(buf1, sizeof(buf1), &p); // ignore tag
            get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
            p += strspn(p, SPACE_CHARS);
            if (av_strstart(p, "inline:", &p))
                get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
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        } else if (av_strstart(p, "source-filter:", &p)) {
            int exclude = 0;
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            get_word(buf1, sizeof(buf1), &p);
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            if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
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                return;
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            exclude = !strcmp(buf1, "excl");
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            get_word(buf1, sizeof(buf1), &p);
            if (strcmp(buf1, "IN") != 0)
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                return;
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            get_word(buf1, sizeof(buf1), &p);
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            if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
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                return;
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            // not checking that the destination address actually matches or is wildcard
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            get_word(buf1, sizeof(buf1), &p);

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            while (*p != '\0') {
                rtsp_src = av_mallocz(sizeof(*rtsp_src));
                if (!rtsp_src)
                    return;
                get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
                if (exclude) {
                    if (s->nb_streams == 0) {
                        dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
                    } else {
                        rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
                        dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
                    }
                } else {
                    if (s->nb_streams == 0) {
                        dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
                    } else {
                        rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
                        dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
                    }
                }
            }
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        } else {
            if (rt->server_type == RTSP_SERVER_WMS)
                ff_wms_parse_sdp_a_line(s, p);
            if (s->nb_streams > 0) {
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                rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];

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                if (rt->server_type == RTSP_SERVER_REAL)
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                    ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
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                if (rtsp_st->dynamic_handler &&
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
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                    rtsp_st->dynamic_handler->parse_sdp_a_line(s,
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                        rtsp_st->stream_index,
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                        rtsp_st->dynamic_protocol_context, buf);
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            }
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        }
        break;
    }
}

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int ff_sdp_parse(AVFormatContext *s, const char *content)
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{
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    RTSPState *rt = s->priv_data;
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    const char *p;
593
    int letter, i;
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    /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
     * contain long SDP lines containing complete ASF Headers (several
     * kB) or arrays of MDPR (RM stream descriptor) headers plus
     * "rulebooks" describing their properties. Therefore, the SDP line
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     * buffer is large.
     *
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     * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
     * in rtpdec_xiph.c. */
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    char buf[16384], *q;
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    SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
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    p = content;
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    for (;;) {
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        p += strspn(p, SPACE_CHARS);
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        letter = *p;
        if (letter == '\0')
            break;
        p++;
        if (*p != '=')
            goto next_line;
        p++;
        /* get the content */
        q = buf;
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        while (*p != '\n' && *p != '\r' && *p != '\0') {
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            if ((q - buf) < sizeof(buf) - 1)
                *q++ = *p;
            p++;
        }
        *q = '\0';
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        sdp_parse_line(s, s1, letter, buf);
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    next_line:
        while (*p != '\n' && *p != '\0')
            p++;
        if (*p == '\n')
            p++;
    }
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    for (i = 0; i < s1->nb_default_include_source_addrs; i++)
        av_free(s1->default_include_source_addrs[i]);
    av_freep(&s1->default_include_source_addrs);
    for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
        av_free(s1->default_exclude_source_addrs[i]);
    av_freep(&s1->default_exclude_source_addrs);

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    rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
    if (!rt->p) return AVERROR(ENOMEM);
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    return 0;
}
642
#endif /* CONFIG_RTPDEC */
643

644
void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
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{
    RTSPState *rt = s->priv_data;
    int i;

    for (i = 0; i < rt->nb_rtsp_streams; i++) {
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
        if (!rtsp_st)
            continue;
        if (rtsp_st->transport_priv) {
            if (s->oformat) {
                AVFormatContext *rtpctx = rtsp_st->transport_priv;
                av_write_trailer(rtpctx);
                if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
                    uint8_t *ptr;
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                    if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
                        ff_rtsp_tcp_write_packet(s, rtsp_st);
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                    avio_close_dyn_buf(rtpctx->pb, &ptr);
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                    av_free(ptr);
                } else {
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                    avio_close(rtpctx->pb);
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                }
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                avformat_free_context(rtpctx);
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            } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
                ff_rdt_parse_close(rtsp_st->transport_priv);
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            else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC)
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                ff_rtp_parse_close(rtsp_st->transport_priv);
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        }
        rtsp_st->transport_priv = NULL;
        if (rtsp_st->rtp_handle)
674
            ffurl_close(rtsp_st->rtp_handle);
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        rtsp_st->rtp_handle = NULL;
    }
}

679
/* close and free RTSP streams */
680
void ff_rtsp_close_streams(AVFormatContext *s)
681
{
682
    RTSPState *rt = s->priv_data;
683
    int i, j;
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    RTSPStream *rtsp_st;

686
    ff_rtsp_undo_setup(s, 0);
687
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
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        rtsp_st = rt->rtsp_streams[i];
        if (rtsp_st) {
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
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                rtsp_st->dynamic_handler->free(
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                    rtsp_st->dynamic_protocol_context);
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            for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
                av_free(rtsp_st->include_source_addrs[j]);
            av_freep(&rtsp_st->include_source_addrs);
            for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
                av_free(rtsp_st->exclude_source_addrs[j]);
            av_freep(&rtsp_st->exclude_source_addrs);

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            av_free(rtsp_st);
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        }
    }
    av_free(rt->rtsp_streams);
    if (rt->asf_ctx) {
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        avformat_close_input(&rt->asf_ctx);
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    }
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    if (rt->ts && CONFIG_RTPDEC)
        ff_mpegts_parse_close(rt->ts);
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    av_free(rt->p);
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    av_free(rt->recvbuf);
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}

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int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
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{
    RTSPState *rt = s->priv_data;
    AVStream *st = NULL;
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    int reordering_queue_size = rt->reordering_queue_size;
    if (reordering_queue_size < 0) {
        if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
            reordering_queue_size = 0;
        else
            reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
    }
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    /* open the RTP context */
    if (rtsp_st->stream_index >= 0)
        st = s->streams[rtsp_st->stream_index];
    if (!st)
        s->ctx_flags |= AVFMTCTX_NOHEADER;

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    if (s->oformat && CONFIG_RTSP_MUXER) {
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        int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
                                        s, st, rtsp_st->rtp_handle,
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                                        RTSP_TCP_MAX_PACKET_SIZE,
                                        rtsp_st->stream_index);
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Reimar Döffinger committed
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        /* Ownership of rtp_handle is passed to the rtp mux context */
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        rtsp_st->rtp_handle = NULL;
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        if (ret < 0)
            return ret;
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    } else if (rt->transport == RTSP_TRANSPORT_RAW) {
        return 0; // Don't need to open any parser here
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    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
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        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
                                            rtsp_st->dynamic_protocol_context,
                                            rtsp_st->dynamic_handler);
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    else if (CONFIG_RTPDEC)
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        rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
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                                         rtsp_st->sdp_payload_type,
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                                         reordering_queue_size);
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    if (!rtsp_st->transport_priv) {
         return AVERROR(ENOMEM);
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    } else if (rt->transport == RTSP_TRANSPORT_RTP && CONFIG_RTPDEC) {
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        if (rtsp_st->dynamic_handler) {
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            ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
                                              rtsp_st->dynamic_protocol_context,
                                              rtsp_st->dynamic_handler);
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        }
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        if (rtsp_st->crypto_suite[0])
            ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
                                    rtsp_st->crypto_suite,
                                    rtsp_st->crypto_params);
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    }

    return 0;
}

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Martin Storsjö committed
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#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
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static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
{
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    const char *q;
    char *p;
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    int v;

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    q = *pp;
    q += strspn(q, SPACE_CHARS);
    v = strtol(q, &p, 10);
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    if (*p == '-') {
        p++;
        *min_ptr = v;
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        v = strtol(p, &p, 10);
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        *max_ptr = v;
    } else {
        *min_ptr = v;
        *max_ptr = v;
    }
    *pp = p;
}

/* XXX: only one transport specification is parsed */
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static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
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{
    char transport_protocol[16];
    char profile[16];
    char lower_transport[16];
    char parameter[16];
    RTSPTransportField *th;
    char buf[256];
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800
    reply->nb_transports = 0;
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802
    for (;;) {
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        p += strspn(p, SPACE_CHARS);
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        if (*p == '\0')
            break;

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

809
        get_word_sep(transport_protocol, sizeof(transport_protocol),
810
                     "/", &p);
811
        if (!av_strcasecmp (transport_protocol, "rtp")) {
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            get_word_sep(profile, sizeof(profile), "/;,", &p);
            lower_transport[0] = '\0';
            /* rtp/avp/<protocol> */
            if (*p == '/') {
                get_word_sep(lower_transport, sizeof(lower_transport),
                             ";,", &p);
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            }
            th->transport = RTSP_TRANSPORT_RTP;
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        } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
                   !av_strcasecmp (transport_protocol, "x-real-rdt")) {
822
            /* x-pn-tng/<protocol> */
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            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
            profile[0] = '\0';
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            th->transport = RTSP_TRANSPORT_RDT;
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        } else if (!av_strcasecmp(transport_protocol, "raw")) {
            get_word_sep(profile, sizeof(profile), "/;,", &p);
            lower_transport[0] = '\0';
            /* raw/raw/<protocol> */
            if (*p == '/') {
                get_word_sep(lower_transport, sizeof(lower_transport),
                             ";,", &p);
            }
            th->transport = RTSP_TRANSPORT_RAW;
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        }
836
        if (!av_strcasecmp(lower_transport, "TCP"))
837
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
838
        else
839
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
840

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        if (*p == ';')
            p++;
        /* get each parameter */
        while (*p != '\0' && *p != ',') {
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
            if (!strcmp(parameter, "port")) {
                if (*p == '=') {
                    p++;
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
                }
            } else if (!strcmp(parameter, "client_port")) {
                if (*p == '=') {
                    p++;
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                    rtsp_parse_range(&th->client_port_min,
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                                     &th->client_port_max, &p);
                }
            } else if (!strcmp(parameter, "server_port")) {
                if (*p == '=') {
                    p++;
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                    rtsp_parse_range(&th->server_port_min,
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                                     &th->server_port_max, &p);
                }
            } else if (!strcmp(parameter, "interleaved")) {
                if (*p == '=') {
                    p++;
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                    rtsp_parse_range(&th->interleaved_min,
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                                     &th->interleaved_max, &p);
                }
            } else if (!strcmp(parameter, "multicast")) {
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                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
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            } else if (!strcmp(parameter, "ttl")) {
                if (*p == '=') {
874
                    char *end;
875
                    p++;
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                    th->ttl = strtol(p, &end, 10);
                    p = end;
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                }
            } else if (!strcmp(parameter, "destination")) {
                if (*p == '=') {
                    p++;
                    get_word_sep(buf, sizeof(buf), ";,", &p);
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                    get_sockaddr(buf, &th->destination);
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                }
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            } else if (!strcmp(parameter, "source")) {
                if (*p == '=') {
                    p++;
                    get_word_sep(buf, sizeof(buf), ";,", &p);
                    av_strlcpy(th->source, buf, sizeof(th->source));
                }
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            } else if (!strcmp(parameter, "mode")) {
                if (*p == '=') {
                    p++;
                    get_word_sep(buf, sizeof(buf), ";, ", &p);
                    if (!strcmp(buf, "record") ||
                        !strcmp(buf, "receive"))
                        th->mode_record = 1;
                }
899
            }
900

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            while (*p != ';' && *p != '\0' && *p != ',')
                p++;
            if (*p == ';')
                p++;
        }
        if (*p == ',')
            p++;

        reply->nb_transports++;
    }
}

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static void handle_rtp_info(RTSPState *rt, const char *url,
                            uint32_t seq, uint32_t rtptime)
{
    int i;
    if (!rtptime || !url[0])
        return;
    if (rt->transport != RTSP_TRANSPORT_RTP)
        return;
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
        RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
        if (!rtpctx)
            continue;
        if (!strcmp(rtsp_st->control_url, url)) {
            rtpctx->base_timestamp = rtptime;
            break;
        }
    }
}

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

    for (;;) {
        p += strspn(p, SPACE_CHARS);
        if (!*p)
            break;
        get_word_sep(key, sizeof(key), "=", &p);
        if (*p != '=')
            break;
        p++;
        get_word_sep(value, sizeof(value), ";, ", &p);
        read++;
        if (!strcmp(key, "url"))
            av_strlcpy(url, value, sizeof(url));
        else if (!strcmp(key, "seq"))
952
            seq = strtoul(value, NULL, 10);
953
        else if (!strcmp(key, "rtptime"))
954
            rtptime = strtoul(value, NULL, 10);
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        if (*p == ',') {
            handle_rtp_info(rt, url, seq, rtptime);
            url[0] = '\0';
            seq = rtptime = 0;
            read = 0;
        }
        if (*p)
            p++;
    }
    if (read > 0)
        handle_rtp_info(rt, url, seq, rtptime);
}

968
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
969
                        RTSPState *rt, const char *method)
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{
    const char *p;

    /* NOTE: we do case independent match for broken servers */
    p = buf;
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    if (av_stristart(p, "Session:", &p)) {
976
        int t;
977
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
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        if (av_stristart(p, ";timeout=", &p) &&
            (t = strtol(p, NULL, 10)) > 0) {
            reply->timeout = t;
        }
982
    } else if (av_stristart(p, "Content-Length:", &p)) {
983
        reply->content_length = strtol(p, NULL, 10);
984
    } else if (av_stristart(p, "Transport:", &p)) {
985
        rtsp_parse_transport(reply, p);
986
    } else if (av_stristart(p, "CSeq:", &p)) {
987
        reply->seq = strtol(p, NULL, 10);
988
    } else if (av_stristart(p, "Range:", &p)) {
989
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
990
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
991
        p += strspn(p, SPACE_CHARS);
992
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
993
    } else if (av_stristart(p, "Server:", &p)) {
994
        p += strspn(p, SPACE_CHARS);
995
        av_strlcpy(reply->server, p, sizeof(reply->server));
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    } else if (av_stristart(p, "Notice:", &p) ||
               av_stristart(p, "X-Notice:", &p)) {
        reply->notice = strtol(p, NULL, 10);
999
    } else if (av_stristart(p, "Location:", &p)) {
1000
        p += strspn(p, SPACE_CHARS);
1001
        av_strlcpy(reply->location, p , sizeof(reply->location));
1002
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
1003
        p += strspn(p, SPACE_CHARS);
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        ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
    } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
1006
        p += strspn(p, SPACE_CHARS);
1007
        ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
1008
    } else if (av_stristart(p, "Content-Base:", &p) && rt) {
1009
        p += strspn(p, SPACE_CHARS);
1010 1011
        if (method && !strcmp(method, "DESCRIBE"))
            av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
1012 1013 1014 1015
    } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
        p += strspn(p, SPACE_CHARS);
        if (method && !strcmp(method, "PLAY"))
            rtsp_parse_rtp_info(rt, p);
1016 1017 1018 1019
    } else if (av_stristart(p, "Public:", &p) && rt) {
        if (strstr(p, "GET_PARAMETER") &&
            method && !strcmp(method, "OPTIONS"))
            rt->get_parameter_supported = 1;
1020 1021 1022
    } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
        p += strspn(p, SPACE_CHARS);
        rt->accept_dynamic_rate = atoi(p);
1023 1024 1025
    } else if (av_stristart(p, "Content-Type:", &p)) {
        p += strspn(p, SPACE_CHARS);
        av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
1026 1027 1028
    }
}

1029
/* skip a RTP/TCP interleaved packet */
1030
void ff_rtsp_skip_packet(AVFormatContext *s)
1031 1032 1033 1034 1035
{
    RTSPState *rt = s->priv_data;
    int ret, len, len1;
    uint8_t buf[1024];

1036
    ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
1037 1038
    if (ret != 3)
        return;
1039
    len = AV_RB16(buf + 1);
1040

1041
    av_dlog(s, "skipping RTP packet len=%d\n", len);
1042

1043 1044 1045 1046 1047
    /* skip payload */
    while (len > 0) {
        len1 = len;
        if (len1 > sizeof(buf))
            len1 = sizeof(buf);
1048
        ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
1049 1050 1051 1052 1053
        if (ret != len1)
            return;
        len -= len1;
    }
}
1054

1055
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
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1056
                       unsigned char **content_ptr,
1057
                       int return_on_interleaved_data, const char *method)
1058 1059 1060 1061 1062
{
    RTSPState *rt = s->priv_data;
    char buf[4096], buf1[1024], *q;
    unsigned char ch;
    const char *p;
1063
    int ret, content_length, line_count = 0, request = 0;
1064 1065
    unsigned char *content = NULL;

1066 1067 1068 1069
start:
    line_count = 0;
    request = 0;
    content = NULL;
1070
    memset(reply, 0, sizeof(*reply));
1071 1072 1073

    /* parse reply (XXX: use buffers) */
    rt->last_reply[0] = '\0';
1074
    for (;;) {
1075
        q = buf;
1076
        for (;;) {
1077
            ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
1078
            av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
1079
            if (ret != 1)
1080
                return AVERROR_EOF;
1081 1082
            if (ch == '\n')
                break;
1083 1084
            if (ch == '$') {
                /* XXX: only parse it if first char on line ? */
1085 1086 1087
                if (return_on_interleaved_data) {
                    return 1;
                } else
1088
                    ff_rtsp_skip_packet(s);
1089
            } else if (ch != '\r') {
1090 1091 1092 1093 1094
                if ((q - buf) < sizeof(buf) - 1)
                    *q++ = ch;
            }
        }
        *q = '\0';
1095

1096
        av_dlog(s, "line='%s'\n", buf);
1097

1098 1099 1100 1101 1102 1103 1104
        /* test if last line */
        if (buf[0] == '\0')
            break;
        p = buf;
        if (line_count == 0) {
            /* get reply code */
            get_word(buf1, sizeof(buf1), &p);
1105 1106 1107 1108 1109 1110 1111 1112 1113
            if (!strncmp(buf1, "RTSP/", 5)) {
                get_word(buf1, sizeof(buf1), &p);
                reply->status_code = atoi(buf1);
                av_strlcpy(reply->reason, p, sizeof(reply->reason));
            } else {
                av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
                get_word(buf1, sizeof(buf1), &p); // object
                request = 1;
            }
1114
        } else {
1115
            ff_rtsp_parse_line(reply, p, rt, method);
1116 1117
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1118 1119 1120
        }
        line_count++;
    }
1121

1122
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
1123
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1124

1125 1126 1127 1128
    content_length = reply->content_length;
    if (content_length > 0) {
        /* leave some room for a trailing '\0' (useful for simple parsing) */
        content = av_malloc(content_length + 1);
1129
        ffurl_read_complete(rt->rtsp_hd, content, content_length);
1130 1131 1132 1133
        content[content_length] = '\0';
    }
    if (content_ptr)
        *content_ptr = content;
1134 1135
    else
        av_free(content);
1136

1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167
    if (request) {
        char buf[1024];
        char base64buf[AV_BASE64_SIZE(sizeof(buf))];
        const char* ptr = buf;

        if (!strcmp(reply->reason, "OPTIONS")) {
            snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
            if (reply->seq)
                av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
            if (reply->session_id[0])
                av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
                                              reply->session_id);
        } else {
            snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
        }
        av_strlcat(buf, "\r\n", sizeof(buf));

        if (rt->control_transport == RTSP_MODE_TUNNEL) {
            av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
            ptr = base64buf;
        }
        ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));

        rt->last_cmd_time = av_gettime();
        /* Even if the request from the server had data, it is not the data
         * that the caller wants or expects. The memory could also be leaked
         * if the actual following reply has content data. */
        if (content_ptr)
            av_freep(content_ptr);
        /* If method is set, this is called from ff_rtsp_send_cmd,
         * where a reply to exactly this request is awaited. For
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1168
         * callers from within packet receiving, we just want to
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         * return to the caller and go back to receiving packets. */
        if (method)
            goto start;
        return 0;
    }

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

1180 1181 1182
    /* EOS */
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
1183
        reply->notice == 2306 /* Continuous Feed Terminated */) {
1184
        rt->state = RTSP_STATE_IDLE;
1185
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
1186
        return AVERROR(EIO); /* data or server error */
1187
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
1188 1189 1190
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
        return AVERROR(EPERM);

1191
    return 0;
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}

1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
/**
 * Send a command to the RTSP server without waiting for the reply.
 *
 * @param s RTSP (de)muxer context
 * @param method the method for the request
 * @param url the target url for the request
 * @param headers extra header lines to include in the request
 * @param send_content if non-null, the data to send as request body content
 * @param send_content_length the length of the send_content data, or 0 if
 *                            send_content is null
 *
 * @return zero if success, nonzero otherwise
 */
1207 1208 1209 1210 1211
static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
                                            const char *method, const char *url,
                                            const char *headers,
                                            const unsigned char *send_content,
                                            int send_content_length)
1212 1213
{
    RTSPState *rt = s->priv_data;
1214 1215
    char buf[4096], *out_buf;
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
1216

1217 1218
    /* Add in RTSP headers */
    out_buf = buf;
1219
    rt->seq++;
1220 1221 1222
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
    if (headers)
        av_strlcat(buf, headers, sizeof(buf));
1223
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1224
    av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n",  rt->user_agent);
1225 1226
    if (rt->session_id[0] != '\0' && (!headers ||
        !strstr(headers, "\nIf-Match:"))) {
1227
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1228
    }
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    if (rt->auth[0]) {
        char *str = ff_http_auth_create_response(&rt->auth_state,
                                                 rt->auth, url, method);
        if (str)
            av_strlcat(buf, str, sizeof(buf));
        av_free(str);
    }
1236 1237
    if (send_content_length > 0 && send_content)
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1238
    av_strlcat(buf, "\r\n", sizeof(buf));
1239

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

1246
    av_dlog(s, "Sending:\n%s--\n", buf);
1247

1248
    ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
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    if (send_content_length > 0 && send_content) {
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
                                    "with content data not supported\n");
            return AVERROR_PATCHWELCOME;
        }
1255
        ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
1256
    }
1257
    rt->last_cmd_time = av_gettime();
1258 1259

    return 0;
1260 1261
}

1262
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1263
                           const char *url, const char *headers)
1264
{
1265
    return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
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}

1268
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1269 1270
                     const char *headers, RTSPMessageHeader *reply,
                     unsigned char **content_ptr)
1271
{
1272
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1273
                                         content_ptr, NULL, 0);
1274 1275
}

1276
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1277 1278 1279 1280 1281 1282
                                  const char *method, const char *url,
                                  const char *header,
                                  RTSPMessageHeader *reply,
                                  unsigned char **content_ptr,
                                  const unsigned char *send_content,
                                  int send_content_length)
1283
{
1284 1285
    RTSPState *rt = s->priv_data;
    HTTPAuthType cur_auth_type;
1286
    int ret, attempts = 0;
1287 1288 1289

retry:
    cur_auth_type = rt->auth_state.auth_type;
1290 1291 1292
    if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
                                                send_content,
                                                send_content_length)))
1293
        return ret;
1294

1295
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1296
        return ret;
1297
    attempts++;
1298

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    if (reply->status_code == 401 &&
        (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
        rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
1302
        goto retry;
1303

1304
    if (reply->status_code > 400){
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1305
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1306
               method,
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1307 1308
               reply->status_code,
               reply->reason);
1309 1310 1311
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
    }

1312
    return 0;
1313 1314
}

1315
int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1316
                              int lower_transport, const char *real_challenge)
1317 1318
{
    RTSPState *rt = s->priv_data;
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1319
    int rtx = 0, j, i, err, interleave = 0, port_off;
1320
    RTSPStream *rtsp_st;
1321
    RTSPMessageHeader reply1, *reply = &reply1;
1322
    char cmd[2048];
1323 1324
    const char *trans_pref;

1325
    if (rt->transport == RTSP_TRANSPORT_RDT)
1326
        trans_pref = "x-pn-tng";
1327 1328
    else if (rt->transport == RTSP_TRANSPORT_RAW)
        trans_pref = "RAW/RAW";
1329 1330
    else
        trans_pref = "RTP/AVP";
1331

1332 1333 1334
    /* default timeout: 1 minute */
    rt->timeout = 60;

1335 1336 1337 1338
    /* Choose a random starting offset within the first half of the
     * port range, to allow for a number of ports to try even if the offset
     * happens to be at the end of the random range. */
    port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
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1339 1340
    /* even random offset */
    port_off -= port_off & 0x01;
1341

1342
    for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
1343 1344
        char transport[2048];

1345
        /*
1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356
         * WMS serves all UDP data over a single connection, the RTX, which
         * isn't necessarily the first in the SDP but has to be the first
         * to be set up, else the second/third SETUP will fail with a 461.
         */
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
             rt->server_type == RTSP_SERVER_WMS) {
            if (i == 0) {
                /* rtx first */
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
                    if (len >= 4 &&
1357 1358
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
                                "/rtx"))
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                        break;
                }
                if (rtx == rt->nb_rtsp_streams)
                    return -1; /* no RTX found */
                rtsp_st = rt->rtsp_streams[rtx];
            } else
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
        } else
1367
            rtsp_st = rt->rtsp_streams[i];
1368 1369

        /* RTP/UDP */
1370
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1371 1372
            char buf[256];

1373 1374 1375 1376 1377
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
                port = reply->transports[0].client_port_min;
                goto have_port;
            }

1378
            /* first try in specified port range */
1379
            while (j <= rt->rtp_port_max) {
1380 1381 1382 1383 1384 1385 1386
                ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
                            "?localport=%d", j);
                /* we will use two ports per rtp stream (rtp and rtcp) */
                j += 2;
                if (!ffurl_open(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
                               &s->interrupt_callback, NULL))
                    goto rtp_opened;
1387
            }
1388 1389 1390
            av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
            err = AVERROR(EIO);
            goto fail;
1391 1392

        rtp_opened:
1393
            port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1394
        have_port:
1395
            snprintf(transport, sizeof(transport) - 1,
1396 1397 1398 1399 1400
                     "%s/UDP;", trans_pref);
            if (rt->server_type != RTSP_SERVER_REAL)
                av_strlcat(transport, "unicast;", sizeof(transport));
            av_strlcatf(transport, sizeof(transport),
                     "client_port=%d", port);
1401 1402
            if (rt->transport == RTSP_TRANSPORT_RTP &&
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1403
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1404 1405 1406
        }

        /* RTP/TCP */
1407
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1408
            /* For WMS streams, the application streams are only used for
1409 1410 1411
             * UDP. When trying to set it up for TCP streams, the server
             * will return an error. Therefore, we skip those streams. */
            if (rt->server_type == RTSP_SERVER_WMS &&
1412 1413 1414
                (rtsp_st->stream_index < 0 ||
                 s->streams[rtsp_st->stream_index]->codec->codec_type ==
                    AVMEDIA_TYPE_DATA))
1415
                continue;
1416
            snprintf(transport, sizeof(transport) - 1,
1417
                     "%s/TCP;", trans_pref);
1418
            if (rt->transport != RTSP_TRANSPORT_RDT)
1419 1420 1421 1422 1423
                av_strlcat(transport, "unicast;", sizeof(transport));
            av_strlcatf(transport, sizeof(transport),
                        "interleaved=%d-%d",
                        interleave, interleave + 1);
            interleave += 2;
1424 1425
        }

1426
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1427
            snprintf(transport, sizeof(transport) - 1,
1428
                     "%s/UDP;multicast", trans_pref);
1429
        }
1430
        if (s->oformat) {
1431
            av_strlcat(transport, ";mode=record", sizeof(transport));
1432
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1433
                   rt->server_type == RTSP_SERVER_WMS)
1434
            av_strlcat(transport, ";mode=play", sizeof(transport));
1435
        snprintf(cmd, sizeof(cmd),
1436
                 "Transport: %s\r\n",
1437
                 transport);
1438 1439
        if (rt->accept_dynamic_rate)
            av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
1440
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1441 1442 1443 1444 1445 1446 1447 1448
            char real_res[41], real_csum[9];
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
                                              real_challenge);
            av_strlcatf(cmd, sizeof(cmd),
                        "If-Match: %s\r\n"
                        "RealChallenge2: %s, sd=%s\r\n",
                        rt->session_id, real_res, real_csum);
        }
1449
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1450 1451 1452
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
            err = 1;
            goto fail;
1453 1454
        } else if (reply->status_code != RTSP_STATUS_OK ||
                   reply->nb_transports != 1) {
1455 1456 1457 1458 1459 1460
            err = AVERROR_INVALIDDATA;
            goto fail;
        }

        /* XXX: same protocol for all streams is required */
        if (i > 0) {
1461 1462
            if (reply->transports[0].lower_transport != rt->lower_transport ||
                reply->transports[0].transport != rt->transport) {
1463 1464 1465 1466
                err = AVERROR_INVALIDDATA;
                goto fail;
            }
        } else {
1467
            rt->lower_transport = reply->transports[0].lower_transport;
1468
            rt->transport = reply->transports[0].transport;
1469 1470
        }

1471 1472 1473 1474 1475 1476
        /* Fail if the server responded with another lower transport mode
         * than what we requested. */
        if (reply->transports[0].lower_transport != lower_transport) {
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
            err = AVERROR_INVALIDDATA;
            goto fail;
1477 1478
        }

1479 1480
        switch(reply->transports[0].lower_transport) {
        case RTSP_LOWER_TRANSPORT_TCP:
1481 1482 1483
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
            break;
1484

1485
        case RTSP_LOWER_TRANSPORT_UDP: {
1486
            char url[1024], options[30] = "";
1487
            const char *peer = host;
1488

1489
            if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
1490
                av_strlcpy(options, "?connect=1", sizeof(options));
1491
            /* Use source address if specified */
1492 1493 1494 1495
            if (reply->transports[0].source[0])
                peer = reply->transports[0].source;
            ff_url_join(url, sizeof(url), "rtp", NULL, peer,
                        reply->transports[0].server_port_min, "%s", options);
1496
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1497
                ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1498 1499
                err = AVERROR_INVALIDDATA;
                goto fail;
1500
            }
1501 1502 1503 1504
            /* Try to initialize the connection state in a
             * potential NAT router by sending dummy packets.
             * RTP/RTCP dummy packets are used for RDT, too.
             */
1505 1506
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
                CONFIG_RTPDEC)
1507
                ff_rtp_send_punch_packets(rtsp_st->rtp_handle);
1508
            break;
1509 1510
        }
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1511
            char url[1024], namebuf[50], optbuf[20] = "";
1512
            struct sockaddr_storage addr;
1513 1514
            int port, ttl;

1515 1516
            if (reply->transports[0].destination.ss_family) {
                addr      = reply->transports[0].destination;
1517 1518 1519
                port      = reply->transports[0].port_min;
                ttl       = reply->transports[0].ttl;
            } else {
1520
                addr      = rtsp_st->sdp_ip;
1521 1522 1523
                port      = rtsp_st->sdp_port;
                ttl       = rtsp_st->sdp_ttl;
            }
1524 1525
            if (ttl > 0)
                snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
1526 1527 1528
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1529
                        port, "%s", optbuf);
1530
            if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
1531
                           &s->interrupt_callback, NULL) < 0) {
1532 1533
                err = AVERROR_INVALIDDATA;
                goto fail;
1534 1535 1536
            }
            break;
        }
1537
        }
1538

1539
        if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
1540
            goto fail;
1541 1542
    }

1543
    if (rt->nb_rtsp_streams && reply->timeout > 0)
1544 1545
        rt->timeout = reply->timeout;

1546
    if (rt->server_type == RTSP_SERVER_REAL)
1547 1548
        rt->need_subscription = 1;

1549 1550 1551
    return 0;

fail:
1552
    ff_rtsp_undo_setup(s, 0);
1553 1554 1555
    return err;
}

1556 1557 1558
void ff_rtsp_close_connections(AVFormatContext *s)
{
    RTSPState *rt = s->priv_data;
1559 1560
    if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
    ffurl_close(rt->rtsp_hd);
1561
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1562 1563
}

1564
int ff_rtsp_connect(AVFormatContext *s)
1565 1566
{
    RTSPState *rt = s->priv_data;
1567
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1568
    int port, err, tcp_fd;
1569
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1570
    int lower_transport_mask = 0;
1571
    char real_challenge[64] = "";
1572 1573
    struct sockaddr_storage peer;
    socklen_t peer_len = sizeof(peer);
1574

1575 1576 1577 1578 1579 1580 1581
    if (rt->rtp_port_max < rt->rtp_port_min) {
        av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
                                "than min port %d\n", rt->rtp_port_max,
                                                      rt->rtp_port_min);
        return AVERROR(EINVAL);
    }

1582 1583
    if (!ff_network_init())
        return AVERROR(EIO);
1584

1585
    if (s->max_delay < 0) /* Not set by the caller */
1586
        s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
1587

1588
    rt->control_transport = RTSP_MODE_PLAIN;
1589 1590 1591 1592 1593 1594 1595 1596 1597
    if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
        rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
        rt->control_transport = RTSP_MODE_TUNNEL;
    }
    /* Only pass through valid flags from here */
    rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;

redirect:
    lower_transport_mask = rt->lower_transport_mask;
1598
    /* extract hostname and port */
1599
    av_url_split(NULL, 0, auth, sizeof(auth),
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1600
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1601
    if (*auth) {
1602
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1603
    }
1604 1605 1606
    if (port < 0)
        port = RTSP_DEFAULT_PORT;

1607
    if (!lower_transport_mask)
1608
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1609

1610
    if (s->oformat) {
1611 1612 1613
        /* Only UDP or TCP - UDP multicast isn't supported. */
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1614
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1615
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1616
                                    "only UDP and TCP are supported for output.\n");
1617 1618 1619 1620 1621
            err = AVERROR(EINVAL);
            goto fail;
        }
    }

1622 1623 1624 1625 1626 1627
    /* Construct the URI used in request; this is similar to s->filename,
     * but with authentication credentials removed and RTSP specific options
     * stripped out. */
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
                host, port, "%s", path);

1628 1629 1630 1631 1632 1633
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
        /* set up initial handshake for tunneling */
        char httpname[1024];
        char sessioncookie[17];
        char headers[1024];

1634
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1635 1636 1637 1638
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
                 av_get_random_seed(), av_get_random_seed());

        /* GET requests */
1639 1640
        if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
                        &s->interrupt_callback) < 0) {
1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651
            err = AVERROR(EIO);
            goto fail;
        }

        /* generate GET headers */
        snprintf(headers, sizeof(headers),
                 "x-sessioncookie: %s\r\n"
                 "Accept: application/x-rtsp-tunnelled\r\n"
                 "Pragma: no-cache\r\n"
                 "Cache-Control: no-cache\r\n",
                 sessioncookie);
1652
        av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
1653 1654

        /* complete the connection */
1655
        if (ffurl_connect(rt->rtsp_hd, NULL)) {
1656 1657 1658 1659 1660
            err = AVERROR(EIO);
            goto fail;
        }

        /* POST requests */
1661 1662
        if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
                        &s->interrupt_callback) < 0 ) {
1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
            err = AVERROR(EIO);
            goto fail;
        }

        /* generate POST headers */
        snprintf(headers, sizeof(headers),
                 "x-sessioncookie: %s\r\n"
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
                 "Pragma: no-cache\r\n"
                 "Cache-Control: no-cache\r\n"
                 "Content-Length: 32767\r\n"
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
                 sessioncookie);
1676
        av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
1677
        av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
1678

1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696
        /* Initialize the authentication state for the POST session. The HTTP
         * protocol implementation doesn't properly handle multi-pass
         * authentication for POST requests, since it would require one of
         * the following:
         * - implementing Expect: 100-continue, which many HTTP servers
         *   don't support anyway, even less the RTSP servers that do HTTP
         *   tunneling
         * - sending the whole POST data until getting a 401 reply specifying
         *   what authentication method to use, then resending all that data
         * - waiting for potential 401 replies directly after sending the
         *   POST header (waiting for some unspecified time)
         * Therefore, we copy the full auth state, which works for both basic
         * and digest. (For digest, we would have to synchronize the nonce
         * count variable between the two sessions, if we'd do more requests
         * with the original session, though.)
         */
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);

1697
        /* complete the connection */
1698
        if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
1699 1700 1701
            err = AVERROR(EIO);
            goto fail;
        }
1702
    } else {
1703
        /* open the tcp connection */
1704 1705
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port,
                    "?timeout=%d", rt->stimeout);
1706
        if (ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
1707
                       &s->interrupt_callback, NULL) < 0) {
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1708 1709 1710
            err = AVERROR(EIO);
            goto fail;
        }
1711
        rt->rtsp_hd_out = rt->rtsp_hd;
1712
    }
1713 1714
    rt->seq = 0;

1715
    tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1716 1717 1718 1719 1720
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
                    NULL, 0, NI_NUMERICHOST);
    }

1721 1722
    /* request options supported by the server; this also detects server
     * type */
1723
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1724
        cmd[0] = 0;
1725
        if (rt->server_type == RTSP_SERVER_REAL)
1726
            av_strlcat(cmd,
1727
                       /*
1728 1729 1730 1731 1732
                        * The following entries are required for proper
                        * streaming from a Realmedia server. They are
                        * interdependent in some way although we currently
                        * don't quite understand how. Values were copied
                        * from mplayer SVN r23589.
1733 1734
                        *   ClientChallenge is a 16-byte ID in hex
                        *   CompanyID is a 16-byte ID in base64
1735 1736 1737 1738 1739 1740
                        */
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
                       sizeof(cmd));
1741
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1742 1743 1744 1745 1746 1747
        if (reply->status_code != RTSP_STATUS_OK) {
            err = AVERROR_INVALIDDATA;
            goto fail;
        }

        /* detect server type if not standard-compliant RTP */
1748 1749
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
            rt->server_type = RTSP_SERVER_REAL;
1750
            continue;
1751
        } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
1752
            rt->server_type = RTSP_SERVER_WMS;
1753
        } else if (rt->server_type == RTSP_SERVER_REAL)
1754 1755 1756 1757
            strcpy(real_challenge, reply->real_challenge);
        break;
    }

1758
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1759
        err = ff_rtsp_setup_input_streams(s, reply);
1760
    else if (CONFIG_RTSP_MUXER)
1761
        err = ff_rtsp_setup_output_streams(s, host);
1762
    if (err)
1763 1764
        goto fail;

1765
    do {
1766 1767
        int lower_transport = ff_log2_tab[lower_transport_mask &
                                  ~(lower_transport_mask - 1)];
1768

1769
        err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1770
                                 rt->server_type == RTSP_SERVER_REAL ?
1771
                                     real_challenge : NULL);
1772
        if (err < 0)
1773
            goto fail;
1774 1775
        lower_transport_mask &= ~(1 << lower_transport);
        if (lower_transport_mask == 0 && err == 1) {
1776
            err = AVERROR(EPROTONOSUPPORT);
1777 1778 1779
            goto fail;
        }
    } while (err);
1780

1781 1782
    rt->lower_transport_mask = lower_transport_mask;
    av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1783
    rt->state = RTSP_STATE_IDLE;
1784
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1785 1786
    return 0;
 fail:
1787
    ff_rtsp_close_streams(s);
1788
    ff_rtsp_close_connections(s);
1789
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1790 1791 1792 1793 1794 1795
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
               reply->status_code,
               s->filename);
        goto redirect;
    }
1796
    ff_network_close();
1797 1798
    return err;
}
1799
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1800

1801
#if CONFIG_RTPDEC
1802
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1803
                           uint8_t *buf, int buf_size, int64_t wait_end)
1804 1805 1806
{
    RTSPState *rt = s->priv_data;
    RTSPStream *rtsp_st;
1807 1808 1809
    int n, i, ret, tcp_fd, timeout_cnt = 0;
    int max_p = 0;
    struct pollfd *p = rt->p;
1810
    int *fds = NULL, fdsnum, fdsidx;
1811

1812
    for (;;) {
1813
        if (ff_check_interrupt(&s->interrupt_callback))
1814
            return AVERROR_EXIT;
1815 1816
        if (wait_end && wait_end - av_gettime() < 0)
            return AVERROR(EAGAIN);
1817
        max_p = 0;
1818
        if (rt->rtsp_hd) {
1819
            tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
1820 1821
            p[max_p].fd = tcp_fd;
            p[max_p++].events = POLLIN;
1822 1823 1824
        } else {
            tcp_fd = -1;
        }
1825
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1826 1827
            rtsp_st = rt->rtsp_streams[i];
            if (rtsp_st->rtp_handle) {
1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842
                if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
                                                      &fds, &fdsnum)) {
                    av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
                    return ret;
                }
                if (fdsnum != 2) {
                    av_log(s, AV_LOG_ERROR,
                           "Number of fds %d not supported\n", fdsnum);
                    return AVERROR_INVALIDDATA;
                }
                for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
                    p[max_p].fd       = fds[fdsidx];
                    p[max_p++].events = POLLIN;
                }
                av_free(fds);
1843 1844
            }
        }
1845
        n = poll(p, max_p, POLL_TIMEOUT_MS);
1846
        if (n > 0) {
1847
            int j = 1 - (tcp_fd == -1);
1848
            timeout_cnt = 0;
1849
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1850 1851
                rtsp_st = rt->rtsp_streams[i];
                if (rtsp_st->rtp_handle) {
1852
                    if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1853
                        ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
1854 1855 1856 1857 1858
                        if (ret > 0) {
                            *prtsp_st = rtsp_st;
                            return ret;
                        }
                    }
1859
                    j+=2;
1860 1861
                }
            }
1862
#if CONFIG_RTSP_DEMUXER
1863
            if (tcp_fd != -1 && p[0].revents & POLLIN) {
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Jordi Ortiz committed
1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881
                if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
                    if (rt->state == RTSP_STATE_STREAMING) {
                        if (!ff_rtsp_parse_streaming_commands(s))
                            return AVERROR_EOF;
                        else
                            av_log(s, AV_LOG_WARNING,
                                   "Unable to answer to TEARDOWN\n");
                    } else
                        return 0;
                } else {
                    RTSPMessageHeader reply;
                    ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
                    if (ret < 0)
                        return ret;
                    /* XXX: parse message */
                    if (rt->state != RTSP_STATE_STREAMING)
                        return 0;
                }
1882
            }
1883
#endif
1884
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1885
            return AVERROR(ETIMEDOUT);
1886 1887
        } else if (n < 0 && errno != EINTR)
            return AVERROR(errno);
1888 1889 1890
    }
}

1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934
static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
                       const uint8_t *buf, int len)
{
    RTSPState *rt = s->priv_data;
    int i;
    if (len < 0)
        return len;
    if (rt->nb_rtsp_streams == 1) {
        *rtsp_st = rt->rtsp_streams[0];
        return len;
    }
    if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
        if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
            int no_ssrc = 0;
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
                RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
                if (!rtpctx)
                    continue;
                if (rtpctx->ssrc == AV_RB32(&buf[4])) {
                    *rtsp_st = rt->rtsp_streams[i];
                    return len;
                }
                if (!rtpctx->ssrc)
                    no_ssrc = 1;
            }
            if (no_ssrc) {
                av_log(s, AV_LOG_WARNING,
                       "Unable to pick stream for packet - SSRC not known for "
                       "all streams\n");
                return AVERROR(EAGAIN);
            }
        } else {
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
                if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
                    *rtsp_st = rt->rtsp_streams[i];
                    return len;
                }
            }
        }
    }
    av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
    return AVERROR(EAGAIN);
}

1935
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1936 1937 1938
{
    RTSPState *rt = s->priv_data;
    int ret, len;
1939 1940
    RTSPStream *rtsp_st, *first_queue_st = NULL;
    int64_t wait_end = 0;
1941

1942 1943 1944
    if (rt->nb_byes == rt->nb_rtsp_streams)
        return AVERROR_EOF;

1945 1946
    /* get next frames from the same RTP packet */
    if (rt->cur_transport_priv) {
1947
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1948
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1949
        } else if (rt->transport == RTSP_TRANSPORT_RTP) {
1950
            ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1951 1952 1953 1954 1955 1956
        } else if (rt->ts && CONFIG_RTPDEC) {
            ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
            if (ret >= 0) {
                rt->recvbuf_pos += ret;
                ret = rt->recvbuf_pos < rt->recvbuf_len;
            }
1957
        } else
1958
            ret = -1;
1959 1960 1961 1962 1963
        if (ret == 0) {
            rt->cur_transport_priv = NULL;
            return 0;
        } else if (ret == 1) {
            return 0;
1964
        } else
1965 1966 1967
            rt->cur_transport_priv = NULL;
    }

1968
redo:
1969 1970 1971 1972 1973
    if (rt->transport == RTSP_TRANSPORT_RTP) {
        int i;
        int64_t first_queue_time = 0;
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1974 1975 1976 1977
            int64_t queue_time;
            if (!rtpctx)
                continue;
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1978 1979 1980 1981 1982 1983
            if (queue_time && (queue_time - first_queue_time < 0 ||
                               !first_queue_time)) {
                first_queue_time = queue_time;
                first_queue_st   = rt->rtsp_streams[i];
            }
        }
1984
        if (first_queue_time) {
1985
            wait_end = first_queue_time + s->max_delay;
1986 1987 1988 1989
        } else {
            wait_end = 0;
            first_queue_st = NULL;
        }
1990 1991
    }

1992
    /* read next RTP packet */
1993 1994 1995 1996 1997 1998
    if (!rt->recvbuf) {
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
        if (!rt->recvbuf)
            return AVERROR(ENOMEM);
    }

1999 2000
    switch(rt->lower_transport) {
    default:
2001
#if CONFIG_RTSP_DEMUXER
2002
    case RTSP_LOWER_TRANSPORT_TCP:
2003
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
2004
        break;
2005
#endif
2006 2007
    case RTSP_LOWER_TRANSPORT_UDP:
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
2008
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
2009
        if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
2010 2011 2012
            ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, rtsp_st->rtp_handle, NULL, len);
        break;
    case RTSP_LOWER_TRANSPORT_CUSTOM:
2013 2014 2015 2016 2017
        if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
            wait_end && wait_end < av_gettime())
            len = AVERROR(EAGAIN);
        else
            len = ffio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
2018 2019 2020
        len = pick_stream(s, &rtsp_st, rt->recvbuf, len);
        if (len > 0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
            ff_rtp_check_and_send_back_rr(rtsp_st->transport_priv, NULL, s->pb, len);
2021 2022
        break;
    }
2023 2024 2025
    if (len == AVERROR(EAGAIN) && first_queue_st &&
        rt->transport == RTSP_TRANSPORT_RTP) {
        rtsp_st = first_queue_st;
2026
        ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
2027 2028
        goto end;
    }
2029 2030 2031 2032
    if (len < 0)
        return len;
    if (len == 0)
        return AVERROR_EOF;
2033
    if (rt->transport == RTSP_TRANSPORT_RDT) {
2034
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2035
    } else if (rt->transport == RTSP_TRANSPORT_RTP) {
2036
        ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
2037 2038 2039 2040 2041 2042
        if (rtsp_st->feedback) {
            AVIOContext *pb = NULL;
            if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
                pb = s->pb;
            ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
        }
2043 2044 2045 2046 2047 2048 2049 2050 2051 2052
        if (ret < 0) {
            /* Either bad packet, or a RTCP packet. Check if the
             * first_rtcp_ntp_time field was initialized. */
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
                /* first_rtcp_ntp_time has been initialized for this stream,
                 * copy the same value to all other uninitialized streams,
                 * in order to map their timestamp origin to the same ntp time
                 * as this one. */
                int i;
2053 2054 2055
                AVStream *st = NULL;
                if (rtsp_st->stream_index >= 0)
                    st = s->streams[rtsp_st->stream_index];
2056
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
2057
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
2058 2059 2060 2061 2062
                    AVStream *st2 = NULL;
                    if (rt->rtsp_streams[i]->stream_index >= 0)
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
                    if (rtpctx2 && st && st2 &&
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
2063
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
2064 2065 2066 2067
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
                            rtpctx->rtcp_ts_offset, st->time_base,
                            st2->time_base);
                    }
2068 2069
                }
            }
2070 2071 2072 2073 2074 2075 2076 2077 2078
            if (ret == -RTCP_BYE) {
                rt->nb_byes++;

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

                if (rt->nb_byes == rt->nb_rtsp_streams)
                    return AVERROR_EOF;
            }
2079
        }
2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091
    } else if (rt->ts && CONFIG_RTPDEC) {
        ret = ff_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
        if (ret >= 0) {
            if (ret < len) {
                rt->recvbuf_len = len;
                rt->recvbuf_pos = ret;
                rt->cur_transport_priv = rt->ts;
                return 1;
            } else {
                ret = 0;
            }
        }
2092 2093
    } else {
        return AVERROR_INVALIDDATA;
2094
    }
2095
end:
2096 2097
    if (ret < 0)
        goto redo;
2098
    if (ret == 1)
2099 2100 2101 2102 2103
        /* more packets may follow, so we save the RTP context */
        rt->cur_transport_priv = rtsp_st->transport_priv;

    return ret;
}
2104
#endif /* CONFIG_RTPDEC */
2105

2106
#if CONFIG_SDP_DEMUXER
2107
static int sdp_probe(AVProbeData *p1)
2108
{
2109
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
2110

2111
    /* we look for a line beginning "c=IN IP" */
2112
    while (p < p_end && *p != '\0') {
2113 2114
        if (p + sizeof("c=IN IP") - 1 < p_end &&
            av_strstart(p, "c=IN IP", NULL))
2115
            return AVPROBE_SCORE_EXTENSION;
2116

2117
        while (p < p_end - 1 && *p != '\n') p++;
2118
        if (++p >= p_end)
2119 2120 2121 2122
            break;
        if (*p == '\r')
            p++;
    }
2123 2124 2125
    return 0;
}

2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136
static void append_source_addrs(char *buf, int size, const char *name,
                                int count, struct RTSPSource **addrs)
{
    int i;
    if (!count)
        return;
    av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
    for (i = 1; i < count; i++)
        av_strlcatf(buf, size, ",%s", addrs[i]->addr);
}

2137
static int sdp_read_header(AVFormatContext *s)
2138
{
2139
    RTSPState *rt = s->priv_data;
2140 2141 2142 2143 2144
    RTSPStream *rtsp_st;
    int size, i, err;
    char *content;
    char url[1024];

2145 2146 2147
    if (!ff_network_init())
        return AVERROR(EIO);

2148
    if (s->max_delay < 0) /* Not set by the caller */
2149
        s->max_delay = DEFAULT_REORDERING_DELAY;
2150 2151
    if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
        rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
2152

2153 2154 2155
    /* read the whole sdp file */
    /* XXX: better loading */
    content = av_malloc(SDP_MAX_SIZE);
2156
    size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
2157 2158 2159 2160 2161 2162
    if (size <= 0) {
        av_free(content);
        return AVERROR_INVALIDDATA;
    }
    content[size] ='\0';

2163
    err = ff_sdp_parse(s, content);
2164
    av_free(content);
2165
    if (err) goto fail;
2166 2167

    /* open each RTP stream */
2168
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
2169
        char namebuf[50];
2170
        rtsp_st = rt->rtsp_streams[i];
2171

2172 2173 2174 2175 2176
        if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
            getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
            ff_url_join(url, sizeof(url), "rtp", NULL,
                        namebuf, rtsp_st->sdp_port,
2177 2178 2179 2180
                        "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
                        rtsp_st->sdp_port, rtsp_st->sdp_ttl,
                        rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
                        rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
2181 2182 2183 2184 2185 2186 2187

            append_source_addrs(url, sizeof(url), "sources",
                                rtsp_st->nb_include_source_addrs,
                                rtsp_st->include_source_addrs);
            append_source_addrs(url, sizeof(url), "block",
                                rtsp_st->nb_exclude_source_addrs,
                                rtsp_st->exclude_source_addrs);
2188 2189 2190 2191 2192
            if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
                           &s->interrupt_callback, NULL) < 0) {
                err = AVERROR_INVALIDDATA;
                goto fail;
            }
2193
        }
2194
        if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
2195
            goto fail;
2196 2197
    }
    return 0;
2198
fail:
2199
    ff_rtsp_close_streams(s);
2200
    ff_network_close();
2201 2202 2203 2204 2205
    return err;
}

static int sdp_read_close(AVFormatContext *s)
{
2206
    ff_rtsp_close_streams(s);
2207
    ff_network_close();
2208 2209 2210
    return 0;
}

2211 2212 2213 2214 2215 2216 2217
static const AVClass sdp_demuxer_class = {
    .class_name     = "SDP demuxer",
    .item_name      = av_default_item_name,
    .option         = sdp_options,
    .version        = LIBAVUTIL_VERSION_INT,
};

2218
AVInputFormat ff_sdp_demuxer = {
2219 2220 2221 2222 2223 2224 2225
    .name           = "sdp",
    .long_name      = NULL_IF_CONFIG_SMALL("SDP"),
    .priv_data_size = sizeof(RTSPState),
    .read_probe     = sdp_probe,
    .read_header    = sdp_read_header,
    .read_packet    = ff_rtsp_fetch_packet,
    .read_close     = sdp_read_close,
2226
    .priv_class     = &sdp_demuxer_class,
2227
};
2228
#endif /* CONFIG_SDP_DEMUXER */
2229

2230
#if CONFIG_RTP_DEMUXER
2231 2232 2233 2234 2235 2236 2237
static int rtp_probe(AVProbeData *p)
{
    if (av_strstart(p->filename, "rtp:", NULL))
        return AVPROBE_SCORE_MAX;
    return 0;
}

2238
static int rtp_read_header(AVFormatContext *s)
2239
{
2240
    uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
2241 2242 2243 2244
    char host[500], sdp[500];
    int ret, port;
    URLContext* in = NULL;
    int payload_type;
2245
    AVCodecContext codec = { 0 };
2246
    struct sockaddr_storage addr;
2247
    AVIOContext pb;
2248
    socklen_t addrlen = sizeof(addr);
2249
    RTSPState *rt = s->priv_data;
2250 2251 2252 2253

    if (!ff_network_init())
        return AVERROR(EIO);

2254
    ret = ffurl_open(&in, s->filename, AVIO_FLAG_READ,
2255
                     &s->interrupt_callback, NULL);
2256 2257 2258 2259
    if (ret)
        goto fail;

    while (1) {
2260
        ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275
        if (ret == AVERROR(EAGAIN))
            continue;
        if (ret < 0)
            goto fail;
        if (ret < 12) {
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
            continue;
        }

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

2276
        if (RTP_PT_IS_RTCP(recvbuf[1]))
2277 2278
            continue;

2279 2280 2281
        payload_type = recvbuf[1] & 0x7f;
        break;
    }
2282
    getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
2283
    ffurl_close(in);
2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308
    in = NULL;

    if (ff_rtp_get_codec_info(&codec, payload_type)) {
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
                                "without an SDP file describing it\n",
                                 payload_type);
        goto fail;
    }
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
                                  "properly you need an SDP file "
                                  "describing it\n");
    }

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

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

2309
    ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
2310 2311 2312 2313 2314
    s->pb = &pb;

    /* sdp_read_header initializes this again */
    ff_network_close();

2315 2316
    rt->media_type_mask = (1 << (AVMEDIA_TYPE_DATA+1)) - 1;

2317
    ret = sdp_read_header(s);
2318 2319 2320 2321 2322
    s->pb = NULL;
    return ret;

fail:
    if (in)
2323
        ffurl_close(in);
2324 2325 2326 2327
    ff_network_close();
    return ret;
}

2328 2329 2330 2331 2332 2333 2334
static const AVClass rtp_demuxer_class = {
    .class_name     = "RTP demuxer",
    .item_name      = av_default_item_name,
    .option         = rtp_options,
    .version        = LIBAVUTIL_VERSION_INT,
};

2335
AVInputFormat ff_rtp_demuxer = {
2336
    .name           = "rtp",
2337
    .long_name      = NULL_IF_CONFIG_SMALL("RTP input"),
2338 2339 2340 2341 2342
    .priv_data_size = sizeof(RTSPState),
    .read_probe     = rtp_probe,
    .read_header    = rtp_read_header,
    .read_packet    = ff_rtsp_fetch_packet,
    .read_close     = sdp_read_close,
2343 2344
    .flags          = AVFMT_NOFILE,
    .priv_class     = &rtp_demuxer_class,
2345
};
2346
#endif /* CONFIG_RTP_DEMUXER */