LCOV - code coverage report
Current view: top level - libavformat - rtsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 14 1434 1.0 %
Date: 2017-12-15 11:05:35 Functions: 2 42 4.8 %

          Line data    Source code
       1             : /*
       2             :  * RTSP/SDP client
       3             :  * Copyright (c) 2002 Fabrice Bellard
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "libavutil/avassert.h"
      23             : #include "libavutil/base64.h"
      24             : #include "libavutil/avstring.h"
      25             : #include "libavutil/intreadwrite.h"
      26             : #include "libavutil/mathematics.h"
      27             : #include "libavutil/parseutils.h"
      28             : #include "libavutil/random_seed.h"
      29             : #include "libavutil/dict.h"
      30             : #include "libavutil/opt.h"
      31             : #include "libavutil/time.h"
      32             : #include "avformat.h"
      33             : #include "avio_internal.h"
      34             : 
      35             : #if HAVE_POLL_H
      36             : #include <poll.h>
      37             : #endif
      38             : #include "internal.h"
      39             : #include "network.h"
      40             : #include "os_support.h"
      41             : #include "http.h"
      42             : #include "rtsp.h"
      43             : 
      44             : #include "rtpdec.h"
      45             : #include "rtpproto.h"
      46             : #include "rdt.h"
      47             : #include "rtpdec_formats.h"
      48             : #include "rtpenc_chain.h"
      49             : #include "url.h"
      50             : #include "rtpenc.h"
      51             : #include "mpegts.h"
      52             : 
      53             : /* Timeout values for socket poll, in ms,
      54             :  * and read_packet(), in seconds  */
      55             : #define POLL_TIMEOUT_MS 100
      56             : #define READ_PACKET_TIMEOUT_S 10
      57             : #define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / POLL_TIMEOUT_MS
      58             : #define SDP_MAX_SIZE 16384
      59             : #define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
      60             : #define DEFAULT_REORDERING_DELAY 100000
      61             : 
      62             : #define OFFSET(x) offsetof(RTSPState, x)
      63             : #define DEC AV_OPT_FLAG_DECODING_PARAM
      64             : #define ENC AV_OPT_FLAG_ENCODING_PARAM
      65             : 
      66             : #define RTSP_FLAG_OPTS(name, longname) \
      67             :     { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
      68             :     { "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" }
      69             : 
      70             : #define RTSP_MEDIATYPE_OPTS(name, longname) \
      71             :     { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { .i64 = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
      72             :     { "video", "Video", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_VIDEO}, 0, 0, DEC, "allowed_media_types" }, \
      73             :     { "audio", "Audio", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_AUDIO}, 0, 0, DEC, "allowed_media_types" }, \
      74             :     { "data", "Data", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_DATA}, 0, 0, DEC, "allowed_media_types" }, \
      75             :     { "subtitle", "Subtitle", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << AVMEDIA_TYPE_SUBTITLE}, 0, 0, DEC, "allowed_media_types" }
      76             : 
      77             : #define COMMON_OPTS() \
      78             :     { "reorder_queue_size", "set number of packets to buffer for handling of reordered packets", OFFSET(reordering_queue_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC }, \
      79             :     { "buffer_size",        "Underlying protocol send/receive buffer size",                  OFFSET(buffer_size),           AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, DEC|ENC } \
      80             : 
      81             : 
      82             : const AVOption ff_rtsp_options[] = {
      83             :     { "initial_pause",  "do not start playing the stream immediately", OFFSET(initial_pause), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
      84             :     FF_RTP_FLAG_OPTS(RTSPState, rtp_muxer_flags),
      85             :     { "rtsp_transport", "set RTSP transport protocols", OFFSET(lower_transport_mask), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, DEC|ENC, "rtsp_transport" }, \
      86             :     { "udp", "UDP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
      87             :     { "tcp", "TCP", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_TCP}, 0, 0, DEC|ENC, "rtsp_transport" }, \
      88             :     { "udp_multicast", "UDP multicast", 0, AV_OPT_TYPE_CONST, {.i64 = 1 << RTSP_LOWER_TRANSPORT_UDP_MULTICAST}, 0, 0, DEC, "rtsp_transport" },
      89             :     { "http", "HTTP tunneling", 0, AV_OPT_TYPE_CONST, {.i64 = (1 << RTSP_LOWER_TRANSPORT_HTTP)}, 0, 0, DEC, "rtsp_transport" },
      90             :     RTSP_FLAG_OPTS("rtsp_flags", "set RTSP flags"),
      91             :     { "listen", "wait for incoming connections", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" },
      92             :     { "prefer_tcp", "try RTP via TCP first, if available", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_PREFER_TCP}, 0, 0, DEC|ENC, "rtsp_flags" },
      93             :     RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
      94             :     { "min_port", "set minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
      95             :     { "max_port", "set maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {.i64 = RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
      96             :     { "timeout", "set maximum timeout (in seconds) to wait for incoming connections (-1 is infinite, imply flag listen)", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC },
      97             :     { "stimeout", "set timeout (in microseconds) of socket TCP I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC },
      98             :     COMMON_OPTS(),
      99             :     { "user-agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
     100             :     { NULL },
     101             : };
     102             : 
     103             : static const AVOption sdp_options[] = {
     104             :     RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
     105             :     { "custom_io", "use custom I/O", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" },
     106             :     { "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" },
     107             :     RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
     108             :     COMMON_OPTS(),
     109             :     { NULL },
     110             : };
     111             : 
     112             : static const AVOption rtp_options[] = {
     113             :     RTSP_FLAG_OPTS("rtp_flags", "set RTP flags"),
     114             :     COMMON_OPTS(),
     115             :     { NULL },
     116             : };
     117             : 
     118             : 
     119           0 : static AVDictionary *map_to_opts(RTSPState *rt)
     120             : {
     121           0 :     AVDictionary *opts = NULL;
     122             :     char buf[256];
     123             : 
     124           0 :     snprintf(buf, sizeof(buf), "%d", rt->buffer_size);
     125           0 :     av_dict_set(&opts, "buffer_size", buf, 0);
     126             : 
     127           0 :     return opts;
     128             : }
     129             : 
     130           0 : static void get_word_until_chars(char *buf, int buf_size,
     131             :                                  const char *sep, const char **pp)
     132             : {
     133             :     const char *p;
     134             :     char *q;
     135             : 
     136           0 :     p = *pp;
     137           0 :     p += strspn(p, SPACE_CHARS);
     138           0 :     q = buf;
     139           0 :     while (!strchr(sep, *p) && *p != '\0') {
     140           0 :         if ((q - buf) < buf_size - 1)
     141           0 :             *q++ = *p;
     142           0 :         p++;
     143             :     }
     144           0 :     if (buf_size > 0)
     145           0 :         *q = '\0';
     146           0 :     *pp = p;
     147           0 : }
     148             : 
     149           0 : static void get_word_sep(char *buf, int buf_size, const char *sep,
     150             :                          const char **pp)
     151             : {
     152           0 :     if (**pp == '/') (*pp)++;
     153           0 :     get_word_until_chars(buf, buf_size, sep, pp);
     154           0 : }
     155             : 
     156           0 : static void get_word(char *buf, int buf_size, const char **pp)
     157             : {
     158           0 :     get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
     159           0 : }
     160             : 
     161             : /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
     162             :  *  and end time.
     163             :  *  Used for seeking in the rtp stream.
     164             :  */
     165           0 : static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
     166             : {
     167             :     char buf[256];
     168             : 
     169           0 :     p += strspn(p, SPACE_CHARS);
     170           0 :     if (!av_stristart(p, "npt=", &p))
     171           0 :         return;
     172             : 
     173           0 :     *start = AV_NOPTS_VALUE;
     174           0 :     *end = AV_NOPTS_VALUE;
     175             : 
     176           0 :     get_word_sep(buf, sizeof(buf), "-", &p);
     177           0 :     if (av_parse_time(start, buf, 1) < 0)
     178           0 :         return;
     179           0 :     if (*p == '-') {
     180           0 :         p++;
     181           0 :         get_word_sep(buf, sizeof(buf), "-", &p);
     182           0 :         if (av_parse_time(end, buf, 1) < 0)
     183           0 :             av_log(NULL, AV_LOG_DEBUG, "Failed to parse interval end specification '%s'\n", buf);
     184             :     }
     185             : }
     186             : 
     187           0 : static int get_sockaddr(AVFormatContext *s,
     188             :                         const char *buf, struct sockaddr_storage *sock)
     189             : {
     190           0 :     struct addrinfo hints = { 0 }, *ai = NULL;
     191             :     int ret;
     192             : 
     193           0 :     hints.ai_flags = AI_NUMERICHOST;
     194           0 :     if ((ret = getaddrinfo(buf, NULL, &hints, &ai))) {
     195           0 :         av_log(s, AV_LOG_ERROR, "getaddrinfo(%s): %s\n",
     196             :                buf,
     197             :                gai_strerror(ret));
     198           0 :         return -1;
     199             :     }
     200           0 :     memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
     201           0 :     freeaddrinfo(ai);
     202           0 :     return 0;
     203             : }
     204             : 
     205             : #if CONFIG_RTPDEC
     206           0 : static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
     207             :                              RTSPStream *rtsp_st, AVStream *st)
     208             : {
     209           0 :     AVCodecParameters *par = st ? st->codecpar : NULL;
     210           0 :     if (!handler)
     211           0 :         return;
     212           0 :     if (par)
     213           0 :         par->codec_id          = handler->codec_id;
     214           0 :     rtsp_st->dynamic_handler = handler;
     215           0 :     if (st)
     216           0 :         st->need_parsing = handler->need_parsing;
     217           0 :     if (handler->priv_data_size) {
     218           0 :         rtsp_st->dynamic_protocol_context = av_mallocz(handler->priv_data_size);
     219           0 :         if (!rtsp_st->dynamic_protocol_context)
     220           0 :             rtsp_st->dynamic_handler = NULL;
     221             :     }
     222             : }
     223             : 
     224           0 : static void finalize_rtp_handler_init(AVFormatContext *s, RTSPStream *rtsp_st,
     225             :                                       AVStream *st)
     226             : {
     227           0 :     if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init) {
     228           0 :         int ret = rtsp_st->dynamic_handler->init(s, st ? st->index : -1,
     229             :                                                  rtsp_st->dynamic_protocol_context);
     230           0 :         if (ret < 0) {
     231           0 :             if (rtsp_st->dynamic_protocol_context) {
     232           0 :                 if (rtsp_st->dynamic_handler->close)
     233           0 :                     rtsp_st->dynamic_handler->close(
     234             :                         rtsp_st->dynamic_protocol_context);
     235           0 :                 av_free(rtsp_st->dynamic_protocol_context);
     236             :             }
     237           0 :             rtsp_st->dynamic_protocol_context = NULL;
     238           0 :             rtsp_st->dynamic_handler = NULL;
     239             :         }
     240             :     }
     241           0 : }
     242             : 
     243             : /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
     244           0 : static int sdp_parse_rtpmap(AVFormatContext *s,
     245             :                             AVStream *st, RTSPStream *rtsp_st,
     246             :                             int payload_type, const char *p)
     247             : {
     248           0 :     AVCodecParameters *par = st->codecpar;
     249             :     char buf[256];
     250             :     int i;
     251             :     const AVCodecDescriptor *desc;
     252             :     const char *c_name;
     253             : 
     254             :     /* See if we can handle this kind of payload.
     255             :      * The space should normally not be there but some Real streams or
     256             :      * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
     257             :      * have a trailing space. */
     258           0 :     get_word_sep(buf, sizeof(buf), "/ ", &p);
     259           0 :     if (payload_type < RTP_PT_PRIVATE) {
     260             :         /* We are in a standard case
     261             :          * (from http://www.iana.org/assignments/rtp-parameters). */
     262           0 :         par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
     263             :     }
     264             : 
     265           0 :     if (par->codec_id == AV_CODEC_ID_NONE) {
     266           0 :         RTPDynamicProtocolHandler *handler =
     267           0 :             ff_rtp_handler_find_by_name(buf, par->codec_type);
     268           0 :         init_rtp_handler(handler, rtsp_st, st);
     269             :         /* If no dynamic handler was found, check with the list of standard
     270             :          * allocated types, if such a stream for some reason happens to
     271             :          * use a private payload type. This isn't handled in rtpdec.c, since
     272             :          * the format name from the rtpmap line never is passed into rtpdec. */
     273           0 :         if (!rtsp_st->dynamic_handler)
     274           0 :             par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
     275             :     }
     276             : 
     277           0 :     desc = avcodec_descriptor_get(par->codec_id);
     278           0 :     if (desc && desc->name)
     279           0 :         c_name = desc->name;
     280             :     else
     281           0 :         c_name = "(null)";
     282             : 
     283           0 :     get_word_sep(buf, sizeof(buf), "/", &p);
     284           0 :     i = atoi(buf);
     285           0 :     switch (par->codec_type) {
     286           0 :     case AVMEDIA_TYPE_AUDIO:
     287           0 :         av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
     288           0 :         par->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
     289           0 :         par->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
     290           0 :         if (i > 0) {
     291           0 :             par->sample_rate = i;
     292           0 :             avpriv_set_pts_info(st, 32, 1, par->sample_rate);
     293           0 :             get_word_sep(buf, sizeof(buf), "/", &p);
     294           0 :             i = atoi(buf);
     295           0 :             if (i > 0)
     296           0 :                 par->channels = i;
     297             :         }
     298           0 :         av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
     299             :                par->sample_rate);
     300           0 :         av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
     301             :                par->channels);
     302           0 :         break;
     303           0 :     case AVMEDIA_TYPE_VIDEO:
     304           0 :         av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
     305           0 :         if (i > 0)
     306           0 :             avpriv_set_pts_info(st, 32, 1, i);
     307           0 :         break;
     308           0 :     default:
     309           0 :         break;
     310             :     }
     311           0 :     finalize_rtp_handler_init(s, rtsp_st, st);
     312           0 :     return 0;
     313             : }
     314             : 
     315             : /* parse the attribute line from the fmtp a line of an sdp response. This
     316             :  * is broken out as a function because it is used in rtp_h264.c, which is
     317             :  * forthcoming. */
     318           0 : int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
     319             :                                 char *value, int value_size)
     320             : {
     321           0 :     *p += strspn(*p, SPACE_CHARS);
     322           0 :     if (**p) {
     323           0 :         get_word_sep(attr, attr_size, "=", p);
     324           0 :         if (**p == '=')
     325           0 :             (*p)++;
     326           0 :         get_word_sep(value, value_size, ";", p);
     327           0 :         if (**p == ';')
     328           0 :             (*p)++;
     329           0 :         return 1;
     330             :     }
     331           0 :     return 0;
     332             : }
     333             : 
     334             : typedef struct SDPParseState {
     335             :     /* SDP only */
     336             :     struct sockaddr_storage default_ip;
     337             :     int            default_ttl;
     338             :     int            skip_media;  ///< set if an unknown m= line occurs
     339             :     int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
     340             :     struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
     341             :     int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
     342             :     struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
     343             :     int seen_rtpmap;
     344             :     int seen_fmtp;
     345             :     char delayed_fmtp[2048];
     346             : } SDPParseState;
     347             : 
     348           0 : static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
     349             :                                       struct RTSPSource ***dest, int *dest_count)
     350             : {
     351             :     RTSPSource *rtsp_src, *rtsp_src2;
     352             :     int i;
     353           0 :     for (i = 0; i < count; i++) {
     354           0 :         rtsp_src = addrs[i];
     355           0 :         rtsp_src2 = av_malloc(sizeof(*rtsp_src2));
     356           0 :         if (!rtsp_src2)
     357           0 :             continue;
     358           0 :         memcpy(rtsp_src2, rtsp_src, sizeof(*rtsp_src));
     359           0 :         dynarray_add(dest, dest_count, rtsp_src2);
     360             :     }
     361           0 : }
     362             : 
     363           0 : static void parse_fmtp(AVFormatContext *s, RTSPState *rt,
     364             :                        int payload_type, const char *line)
     365             : {
     366             :     int i;
     367             : 
     368           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
     369           0 :         RTSPStream *rtsp_st = rt->rtsp_streams[i];
     370           0 :         if (rtsp_st->sdp_payload_type == payload_type &&
     371           0 :             rtsp_st->dynamic_handler &&
     372           0 :             rtsp_st->dynamic_handler->parse_sdp_a_line) {
     373           0 :             rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
     374             :                 rtsp_st->dynamic_protocol_context, line);
     375             :         }
     376             :     }
     377           0 : }
     378             : 
     379           0 : static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
     380             :                            int letter, const char *buf)
     381             : {
     382           0 :     RTSPState *rt = s->priv_data;
     383             :     char buf1[64], st_type[64];
     384             :     const char *p;
     385             :     enum AVMediaType codec_type;
     386             :     int payload_type;
     387             :     AVStream *st;
     388             :     RTSPStream *rtsp_st;
     389             :     RTSPSource *rtsp_src;
     390             :     struct sockaddr_storage sdp_ip;
     391             :     int ttl;
     392             : 
     393           0 :     av_log(s, AV_LOG_TRACE, "sdp: %c='%s'\n", letter, buf);
     394             : 
     395           0 :     p = buf;
     396           0 :     if (s1->skip_media && letter != 'm')
     397           0 :         return;
     398           0 :     switch (letter) {
     399           0 :     case 'c':
     400           0 :         get_word(buf1, sizeof(buf1), &p);
     401           0 :         if (strcmp(buf1, "IN") != 0)
     402           0 :             return;
     403           0 :         get_word(buf1, sizeof(buf1), &p);
     404           0 :         if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
     405           0 :             return;
     406           0 :         get_word_sep(buf1, sizeof(buf1), "/", &p);
     407           0 :         if (get_sockaddr(s, buf1, &sdp_ip))
     408           0 :             return;
     409           0 :         ttl = 16;
     410           0 :         if (*p == '/') {
     411           0 :             p++;
     412           0 :             get_word_sep(buf1, sizeof(buf1), "/", &p);
     413           0 :             ttl = atoi(buf1);
     414             :         }
     415           0 :         if (s->nb_streams == 0) {
     416           0 :             s1->default_ip = sdp_ip;
     417           0 :             s1->default_ttl = ttl;
     418             :         } else {
     419           0 :             rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     420           0 :             rtsp_st->sdp_ip = sdp_ip;
     421           0 :             rtsp_st->sdp_ttl = ttl;
     422             :         }
     423           0 :         break;
     424           0 :     case 's':
     425           0 :         av_dict_set(&s->metadata, "title", p, 0);
     426           0 :         break;
     427           0 :     case 'i':
     428           0 :         if (s->nb_streams == 0) {
     429           0 :             av_dict_set(&s->metadata, "comment", p, 0);
     430           0 :             break;
     431             :         }
     432           0 :         break;
     433           0 :     case 'm':
     434             :         /* new stream */
     435           0 :         s1->skip_media  = 0;
     436           0 :         s1->seen_fmtp   = 0;
     437           0 :         s1->seen_rtpmap = 0;
     438           0 :         codec_type = AVMEDIA_TYPE_UNKNOWN;
     439           0 :         get_word(st_type, sizeof(st_type), &p);
     440           0 :         if (!strcmp(st_type, "audio")) {
     441           0 :             codec_type = AVMEDIA_TYPE_AUDIO;
     442           0 :         } else if (!strcmp(st_type, "video")) {
     443           0 :             codec_type = AVMEDIA_TYPE_VIDEO;
     444           0 :         } else if (!strcmp(st_type, "application")) {
     445           0 :             codec_type = AVMEDIA_TYPE_DATA;
     446           0 :         } else if (!strcmp(st_type, "text")) {
     447           0 :             codec_type = AVMEDIA_TYPE_SUBTITLE;
     448             :         }
     449           0 :         if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
     450           0 :             s1->skip_media = 1;
     451           0 :             return;
     452             :         }
     453           0 :         rtsp_st = av_mallocz(sizeof(RTSPStream));
     454           0 :         if (!rtsp_st)
     455           0 :             return;
     456           0 :         rtsp_st->stream_index = -1;
     457           0 :         dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
     458             : 
     459           0 :         rtsp_st->sdp_ip = s1->default_ip;
     460           0 :         rtsp_st->sdp_ttl = s1->default_ttl;
     461             : 
     462           0 :         copy_default_source_addrs(s1->default_include_source_addrs,
     463             :                                   s1->nb_default_include_source_addrs,
     464             :                                   &rtsp_st->include_source_addrs,
     465             :                                   &rtsp_st->nb_include_source_addrs);
     466           0 :         copy_default_source_addrs(s1->default_exclude_source_addrs,
     467             :                                   s1->nb_default_exclude_source_addrs,
     468             :                                   &rtsp_st->exclude_source_addrs,
     469             :                                   &rtsp_st->nb_exclude_source_addrs);
     470             : 
     471           0 :         get_word(buf1, sizeof(buf1), &p); /* port */
     472           0 :         rtsp_st->sdp_port = atoi(buf1);
     473             : 
     474           0 :         get_word(buf1, sizeof(buf1), &p); /* protocol */
     475           0 :         if (!strcmp(buf1, "udp"))
     476           0 :             rt->transport = RTSP_TRANSPORT_RAW;
     477           0 :         else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
     478           0 :             rtsp_st->feedback = 1;
     479             : 
     480             :         /* XXX: handle list of formats */
     481           0 :         get_word(buf1, sizeof(buf1), &p); /* format list */
     482           0 :         rtsp_st->sdp_payload_type = atoi(buf1);
     483             : 
     484           0 :         if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
     485             :             /* no corresponding stream */
     486           0 :             if (rt->transport == RTSP_TRANSPORT_RAW) {
     487           0 :                 if (CONFIG_RTPDEC && !rt->ts)
     488           0 :                     rt->ts = avpriv_mpegts_parse_open(s);
     489             :             } else {
     490             :                 RTPDynamicProtocolHandler *handler;
     491           0 :                 handler = ff_rtp_handler_find_by_id(
     492             :                               rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
     493           0 :                 init_rtp_handler(handler, rtsp_st, NULL);
     494           0 :                 finalize_rtp_handler_init(s, rtsp_st, NULL);
     495             :             }
     496           0 :         } else if (rt->server_type == RTSP_SERVER_WMS &&
     497             :                    codec_type == AVMEDIA_TYPE_DATA) {
     498             :             /* RTX stream, a stream that carries all the other actual
     499             :              * audio/video streams. Don't expose this to the callers. */
     500             :         } else {
     501           0 :             st = avformat_new_stream(s, NULL);
     502           0 :             if (!st)
     503           0 :                 return;
     504           0 :             st->id = rt->nb_rtsp_streams - 1;
     505           0 :             rtsp_st->stream_index = st->index;
     506           0 :             st->codecpar->codec_type = codec_type;
     507           0 :             if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
     508             :                 RTPDynamicProtocolHandler *handler;
     509             :                 /* if standard payload type, we can find the codec right now */
     510           0 :                 ff_rtp_get_codec_info(st->codecpar, rtsp_st->sdp_payload_type);
     511           0 :                 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
     512           0 :                     st->codecpar->sample_rate > 0)
     513           0 :                     avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
     514             :                 /* Even static payload types may need a custom depacketizer */
     515           0 :                 handler = ff_rtp_handler_find_by_id(
     516           0 :                               rtsp_st->sdp_payload_type, st->codecpar->codec_type);
     517           0 :                 init_rtp_handler(handler, rtsp_st, st);
     518           0 :                 finalize_rtp_handler_init(s, rtsp_st, st);
     519             :             }
     520           0 :             if (rt->default_lang[0])
     521           0 :                 av_dict_set(&st->metadata, "language", rt->default_lang, 0);
     522             :         }
     523             :         /* put a default control url */
     524           0 :         av_strlcpy(rtsp_st->control_url, rt->control_uri,
     525             :                    sizeof(rtsp_st->control_url));
     526           0 :         break;
     527           0 :     case 'a':
     528           0 :         if (av_strstart(p, "control:", &p)) {
     529           0 :             if (s->nb_streams == 0) {
     530           0 :                 if (!strncmp(p, "rtsp://", 7))
     531           0 :                     av_strlcpy(rt->control_uri, p,
     532             :                                sizeof(rt->control_uri));
     533             :             } else {
     534             :                 char proto[32];
     535             :                 /* get the control url */
     536           0 :                 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     537             : 
     538             :                 /* XXX: may need to add full url resolution */
     539           0 :                 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
     540             :                              NULL, NULL, 0, p);
     541           0 :                 if (proto[0] == '\0') {
     542             :                     /* relative control URL */
     543           0 :                     if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
     544           0 :                     av_strlcat(rtsp_st->control_url, "/",
     545             :                                sizeof(rtsp_st->control_url));
     546           0 :                     av_strlcat(rtsp_st->control_url, p,
     547             :                                sizeof(rtsp_st->control_url));
     548             :                 } else
     549           0 :                     av_strlcpy(rtsp_st->control_url, p,
     550             :                                sizeof(rtsp_st->control_url));
     551             :             }
     552           0 :         } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
     553             :             /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
     554           0 :             get_word(buf1, sizeof(buf1), &p);
     555           0 :             payload_type = atoi(buf1);
     556           0 :             rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     557           0 :             if (rtsp_st->stream_index >= 0) {
     558           0 :                 st = s->streams[rtsp_st->stream_index];
     559           0 :                 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
     560             :             }
     561           0 :             s1->seen_rtpmap = 1;
     562           0 :             if (s1->seen_fmtp) {
     563           0 :                 parse_fmtp(s, rt, payload_type, s1->delayed_fmtp);
     564             :             }
     565           0 :         } else if (av_strstart(p, "fmtp:", &p) ||
     566           0 :                    av_strstart(p, "framesize:", &p)) {
     567             :             // let dynamic protocol handlers have a stab at the line.
     568           0 :             get_word(buf1, sizeof(buf1), &p);
     569           0 :             payload_type = atoi(buf1);
     570           0 :             if (s1->seen_rtpmap) {
     571           0 :                 parse_fmtp(s, rt, payload_type, buf);
     572             :             } else {
     573           0 :                 s1->seen_fmtp = 1;
     574           0 :                 av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp));
     575             :             }
     576           0 :         } else if (av_strstart(p, "ssrc:", &p) && s->nb_streams > 0) {
     577           0 :             rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     578           0 :             get_word(buf1, sizeof(buf1), &p);
     579           0 :             rtsp_st->ssrc = strtoll(buf1, NULL, 10);
     580           0 :         } else if (av_strstart(p, "range:", &p)) {
     581             :             int64_t start, end;
     582             : 
     583             :             // this is so that seeking on a streamed file can work.
     584           0 :             rtsp_parse_range_npt(p, &start, &end);
     585           0 :             s->start_time = start;
     586             :             /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
     587           0 :             s->duration   = (end == AV_NOPTS_VALUE) ?
     588           0 :                             AV_NOPTS_VALUE : end - start;
     589           0 :         } else if (av_strstart(p, "lang:", &p)) {
     590           0 :             if (s->nb_streams > 0) {
     591           0 :                 get_word(buf1, sizeof(buf1), &p);
     592           0 :                 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     593           0 :                 if (rtsp_st->stream_index >= 0) {
     594           0 :                     st = s->streams[rtsp_st->stream_index];
     595           0 :                     av_dict_set(&st->metadata, "language", buf1, 0);
     596             :                 }
     597             :             } else
     598           0 :                 get_word(rt->default_lang, sizeof(rt->default_lang), &p);
     599           0 :         } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
     600           0 :             if (atoi(p) == 1)
     601           0 :                 rt->transport = RTSP_TRANSPORT_RDT;
     602           0 :         } else if (av_strstart(p, "SampleRate:integer;", &p) &&
     603           0 :                    s->nb_streams > 0) {
     604           0 :             st = s->streams[s->nb_streams - 1];
     605           0 :             st->codecpar->sample_rate = atoi(p);
     606           0 :         } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
     607             :             // RFC 4568
     608           0 :             rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     609           0 :             get_word(buf1, sizeof(buf1), &p); // ignore tag
     610           0 :             get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
     611           0 :             p += strspn(p, SPACE_CHARS);
     612           0 :             if (av_strstart(p, "inline:", &p))
     613           0 :                 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
     614           0 :         } else if (av_strstart(p, "source-filter:", &p)) {
     615           0 :             int exclude = 0;
     616           0 :             get_word(buf1, sizeof(buf1), &p);
     617           0 :             if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
     618           0 :                 return;
     619           0 :             exclude = !strcmp(buf1, "excl");
     620             : 
     621           0 :             get_word(buf1, sizeof(buf1), &p);
     622           0 :             if (strcmp(buf1, "IN") != 0)
     623           0 :                 return;
     624           0 :             get_word(buf1, sizeof(buf1), &p);
     625           0 :             if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
     626           0 :                 return;
     627             :             // not checking that the destination address actually matches or is wildcard
     628           0 :             get_word(buf1, sizeof(buf1), &p);
     629             : 
     630           0 :             while (*p != '\0') {
     631           0 :                 rtsp_src = av_mallocz(sizeof(*rtsp_src));
     632           0 :                 if (!rtsp_src)
     633           0 :                     return;
     634           0 :                 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
     635           0 :                 if (exclude) {
     636           0 :                     if (s->nb_streams == 0) {
     637           0 :                         dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
     638             :                     } else {
     639           0 :                         rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     640           0 :                         dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
     641             :                     }
     642             :                 } else {
     643           0 :                     if (s->nb_streams == 0) {
     644           0 :                         dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
     645             :                     } else {
     646           0 :                         rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     647           0 :                         dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
     648             :                     }
     649             :                 }
     650             :             }
     651             :         } else {
     652           0 :             if (rt->server_type == RTSP_SERVER_WMS)
     653           0 :                 ff_wms_parse_sdp_a_line(s, p);
     654           0 :             if (s->nb_streams > 0) {
     655           0 :                 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     656             : 
     657           0 :                 if (rt->server_type == RTSP_SERVER_REAL)
     658           0 :                     ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
     659             : 
     660           0 :                 if (rtsp_st->dynamic_handler &&
     661           0 :                     rtsp_st->dynamic_handler->parse_sdp_a_line)
     662           0 :                     rtsp_st->dynamic_handler->parse_sdp_a_line(s,
     663             :                         rtsp_st->stream_index,
     664             :                         rtsp_st->dynamic_protocol_context, buf);
     665             :             }
     666             :         }
     667           0 :         break;
     668             :     }
     669             : }
     670             : 
     671           0 : int ff_sdp_parse(AVFormatContext *s, const char *content)
     672             : {
     673             :     const char *p;
     674             :     int letter, i;
     675             :     /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
     676             :      * contain long SDP lines containing complete ASF Headers (several
     677             :      * kB) or arrays of MDPR (RM stream descriptor) headers plus
     678             :      * "rulebooks" describing their properties. Therefore, the SDP line
     679             :      * buffer is large.
     680             :      *
     681             :      * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
     682             :      * in rtpdec_xiph.c. */
     683             :     char buf[16384], *q;
     684           0 :     SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
     685             : 
     686           0 :     p = content;
     687             :     for (;;) {
     688           0 :         p += strspn(p, SPACE_CHARS);
     689           0 :         letter = *p;
     690           0 :         if (letter == '\0')
     691           0 :             break;
     692           0 :         p++;
     693           0 :         if (*p != '=')
     694           0 :             goto next_line;
     695           0 :         p++;
     696             :         /* get the content */
     697           0 :         q = buf;
     698           0 :         while (*p != '\n' && *p != '\r' && *p != '\0') {
     699           0 :             if ((q - buf) < sizeof(buf) - 1)
     700           0 :                 *q++ = *p;
     701           0 :             p++;
     702             :         }
     703           0 :         *q = '\0';
     704           0 :         sdp_parse_line(s, s1, letter, buf);
     705           0 :     next_line:
     706           0 :         while (*p != '\n' && *p != '\0')
     707           0 :             p++;
     708           0 :         if (*p == '\n')
     709           0 :             p++;
     710             :     }
     711             : 
     712           0 :     for (i = 0; i < s1->nb_default_include_source_addrs; i++)
     713           0 :         av_freep(&s1->default_include_source_addrs[i]);
     714           0 :     av_freep(&s1->default_include_source_addrs);
     715           0 :     for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
     716           0 :         av_freep(&s1->default_exclude_source_addrs[i]);
     717           0 :     av_freep(&s1->default_exclude_source_addrs);
     718             : 
     719           0 :     return 0;
     720             : }
     721             : #endif /* CONFIG_RTPDEC */
     722             : 
     723           0 : void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
     724             : {
     725           0 :     RTSPState *rt = s->priv_data;
     726             :     int i;
     727             : 
     728           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
     729           0 :         RTSPStream *rtsp_st = rt->rtsp_streams[i];
     730           0 :         if (!rtsp_st)
     731           0 :             continue;
     732           0 :         if (rtsp_st->transport_priv) {
     733           0 :             if (s->oformat) {
     734           0 :                 AVFormatContext *rtpctx = rtsp_st->transport_priv;
     735           0 :                 av_write_trailer(rtpctx);
     736           0 :                 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
     737           0 :                     if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
     738           0 :                         ff_rtsp_tcp_write_packet(s, rtsp_st);
     739           0 :                     ffio_free_dyn_buf(&rtpctx->pb);
     740             :                 } else {
     741           0 :                     avio_closep(&rtpctx->pb);
     742             :                 }
     743           0 :                 avformat_free_context(rtpctx);
     744           0 :             } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
     745           0 :                 ff_rdt_parse_close(rtsp_st->transport_priv);
     746           0 :             else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
     747           0 :                 ff_rtp_parse_close(rtsp_st->transport_priv);
     748             :         }
     749           0 :         rtsp_st->transport_priv = NULL;
     750           0 :         if (rtsp_st->rtp_handle)
     751           0 :             ffurl_close(rtsp_st->rtp_handle);
     752           0 :         rtsp_st->rtp_handle = NULL;
     753             :     }
     754           0 : }
     755             : 
     756             : /* close and free RTSP streams */
     757           0 : void ff_rtsp_close_streams(AVFormatContext *s)
     758             : {
     759           0 :     RTSPState *rt = s->priv_data;
     760             :     int i, j;
     761             :     RTSPStream *rtsp_st;
     762             : 
     763           0 :     ff_rtsp_undo_setup(s, 0);
     764           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
     765           0 :         rtsp_st = rt->rtsp_streams[i];
     766           0 :         if (rtsp_st) {
     767           0 :             if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) {
     768           0 :                 if (rtsp_st->dynamic_handler->close)
     769           0 :                     rtsp_st->dynamic_handler->close(
     770           0 :                         rtsp_st->dynamic_protocol_context);
     771           0 :                 av_free(rtsp_st->dynamic_protocol_context);
     772             :             }
     773           0 :             for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
     774           0 :                 av_freep(&rtsp_st->include_source_addrs[j]);
     775           0 :             av_freep(&rtsp_st->include_source_addrs);
     776           0 :             for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
     777           0 :                 av_freep(&rtsp_st->exclude_source_addrs[j]);
     778           0 :             av_freep(&rtsp_st->exclude_source_addrs);
     779             : 
     780           0 :             av_freep(&rtsp_st);
     781             :         }
     782             :     }
     783           0 :     av_freep(&rt->rtsp_streams);
     784           0 :     if (rt->asf_ctx) {
     785           0 :         avformat_close_input(&rt->asf_ctx);
     786             :     }
     787           0 :     if (CONFIG_RTPDEC && rt->ts)
     788           0 :         avpriv_mpegts_parse_close(rt->ts);
     789           0 :     av_freep(&rt->p);
     790           0 :     av_freep(&rt->recvbuf);
     791           0 : }
     792             : 
     793           0 : int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
     794             : {
     795           0 :     RTSPState *rt = s->priv_data;
     796           0 :     AVStream *st = NULL;
     797           0 :     int reordering_queue_size = rt->reordering_queue_size;
     798           0 :     if (reordering_queue_size < 0) {
     799           0 :         if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
     800           0 :             reordering_queue_size = 0;
     801             :         else
     802           0 :             reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
     803             :     }
     804             : 
     805             :     /* open the RTP context */
     806           0 :     if (rtsp_st->stream_index >= 0)
     807           0 :         st = s->streams[rtsp_st->stream_index];
     808           0 :     if (!st)
     809           0 :         s->ctx_flags |= AVFMTCTX_NOHEADER;
     810             : 
     811           0 :     if (CONFIG_RTSP_MUXER && s->oformat && st) {
     812           0 :         int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
     813             :                                         s, st, rtsp_st->rtp_handle,
     814             :                                         RTSP_TCP_MAX_PACKET_SIZE,
     815             :                                         rtsp_st->stream_index);
     816             :         /* Ownership of rtp_handle is passed to the rtp mux context */
     817           0 :         rtsp_st->rtp_handle = NULL;
     818           0 :         if (ret < 0)
     819           0 :             return ret;
     820           0 :         st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
     821           0 :     } else if (rt->transport == RTSP_TRANSPORT_RAW) {
     822           0 :         return 0; // Don't need to open any parser here
     823           0 :     } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT && st)
     824           0 :         rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
     825           0 :                                             rtsp_st->dynamic_protocol_context,
     826             :                                             rtsp_st->dynamic_handler);
     827             :     else if (CONFIG_RTPDEC)
     828           0 :         rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
     829             :                                          rtsp_st->sdp_payload_type,
     830             :                                          reordering_queue_size);
     831             : 
     832           0 :     if (!rtsp_st->transport_priv) {
     833           0 :          return AVERROR(ENOMEM);
     834           0 :     } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP &&
     835           0 :                s->iformat) {
     836           0 :         RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
     837           0 :         rtpctx->ssrc = rtsp_st->ssrc;
     838           0 :         if (rtsp_st->dynamic_handler) {
     839           0 :             ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
     840             :                                               rtsp_st->dynamic_protocol_context,
     841             :                                               rtsp_st->dynamic_handler);
     842             :         }
     843           0 :         if (rtsp_st->crypto_suite[0])
     844           0 :             ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
     845           0 :                                     rtsp_st->crypto_suite,
     846           0 :                                     rtsp_st->crypto_params);
     847             :     }
     848             : 
     849           0 :     return 0;
     850             : }
     851             : 
     852             : #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
     853           0 : static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
     854             : {
     855             :     const char *q;
     856             :     char *p;
     857             :     int v;
     858             : 
     859           0 :     q = *pp;
     860           0 :     q += strspn(q, SPACE_CHARS);
     861           0 :     v = strtol(q, &p, 10);
     862           0 :     if (*p == '-') {
     863           0 :         p++;
     864           0 :         *min_ptr = v;
     865           0 :         v = strtol(p, &p, 10);
     866           0 :         *max_ptr = v;
     867             :     } else {
     868           0 :         *min_ptr = v;
     869           0 :         *max_ptr = v;
     870             :     }
     871           0 :     *pp = p;
     872           0 : }
     873             : 
     874             : /* XXX: only one transport specification is parsed */
     875           0 : static void rtsp_parse_transport(AVFormatContext *s,
     876             :                                  RTSPMessageHeader *reply, const char *p)
     877             : {
     878             :     char transport_protocol[16];
     879             :     char profile[16];
     880             :     char lower_transport[16];
     881             :     char parameter[16];
     882             :     RTSPTransportField *th;
     883             :     char buf[256];
     884             : 
     885           0 :     reply->nb_transports = 0;
     886             : 
     887             :     for (;;) {
     888           0 :         p += strspn(p, SPACE_CHARS);
     889           0 :         if (*p == '\0')
     890           0 :             break;
     891             : 
     892           0 :         th = &reply->transports[reply->nb_transports];
     893             : 
     894           0 :         get_word_sep(transport_protocol, sizeof(transport_protocol),
     895             :                      "/", &p);
     896           0 :         if (!av_strcasecmp (transport_protocol, "rtp")) {
     897           0 :             get_word_sep(profile, sizeof(profile), "/;,", &p);
     898           0 :             lower_transport[0] = '\0';
     899             :             /* rtp/avp/<protocol> */
     900           0 :             if (*p == '/') {
     901           0 :                 get_word_sep(lower_transport, sizeof(lower_transport),
     902             :                              ";,", &p);
     903             :             }
     904           0 :             th->transport = RTSP_TRANSPORT_RTP;
     905           0 :         } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
     906           0 :                    !av_strcasecmp (transport_protocol, "x-real-rdt")) {
     907             :             /* x-pn-tng/<protocol> */
     908           0 :             get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
     909           0 :             profile[0] = '\0';
     910           0 :             th->transport = RTSP_TRANSPORT_RDT;
     911           0 :         } else if (!av_strcasecmp(transport_protocol, "raw")) {
     912           0 :             get_word_sep(profile, sizeof(profile), "/;,", &p);
     913           0 :             lower_transport[0] = '\0';
     914             :             /* raw/raw/<protocol> */
     915           0 :             if (*p == '/') {
     916           0 :                 get_word_sep(lower_transport, sizeof(lower_transport),
     917             :                              ";,", &p);
     918             :             }
     919           0 :             th->transport = RTSP_TRANSPORT_RAW;
     920             :         }
     921           0 :         if (!av_strcasecmp(lower_transport, "TCP"))
     922           0 :             th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
     923             :         else
     924           0 :             th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
     925             : 
     926           0 :         if (*p == ';')
     927           0 :             p++;
     928             :         /* get each parameter */
     929           0 :         while (*p != '\0' && *p != ',') {
     930           0 :             get_word_sep(parameter, sizeof(parameter), "=;,", &p);
     931           0 :             if (!strcmp(parameter, "port")) {
     932           0 :                 if (*p == '=') {
     933           0 :                     p++;
     934           0 :                     rtsp_parse_range(&th->port_min, &th->port_max, &p);
     935             :                 }
     936           0 :             } else if (!strcmp(parameter, "client_port")) {
     937           0 :                 if (*p == '=') {
     938           0 :                     p++;
     939           0 :                     rtsp_parse_range(&th->client_port_min,
     940             :                                      &th->client_port_max, &p);
     941             :                 }
     942           0 :             } else if (!strcmp(parameter, "server_port")) {
     943           0 :                 if (*p == '=') {
     944           0 :                     p++;
     945           0 :                     rtsp_parse_range(&th->server_port_min,
     946             :                                      &th->server_port_max, &p);
     947             :                 }
     948           0 :             } else if (!strcmp(parameter, "interleaved")) {
     949           0 :                 if (*p == '=') {
     950           0 :                     p++;
     951           0 :                     rtsp_parse_range(&th->interleaved_min,
     952             :                                      &th->interleaved_max, &p);
     953             :                 }
     954           0 :             } else if (!strcmp(parameter, "multicast")) {
     955           0 :                 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
     956           0 :                     th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
     957           0 :             } else if (!strcmp(parameter, "ttl")) {
     958           0 :                 if (*p == '=') {
     959             :                     char *end;
     960           0 :                     p++;
     961           0 :                     th->ttl = strtol(p, &end, 10);
     962           0 :                     p = end;
     963             :                 }
     964           0 :             } else if (!strcmp(parameter, "destination")) {
     965           0 :                 if (*p == '=') {
     966           0 :                     p++;
     967           0 :                     get_word_sep(buf, sizeof(buf), ";,", &p);
     968           0 :                     get_sockaddr(s, buf, &th->destination);
     969             :                 }
     970           0 :             } else if (!strcmp(parameter, "source")) {
     971           0 :                 if (*p == '=') {
     972           0 :                     p++;
     973           0 :                     get_word_sep(buf, sizeof(buf), ";,", &p);
     974           0 :                     av_strlcpy(th->source, buf, sizeof(th->source));
     975             :                 }
     976           0 :             } else if (!strcmp(parameter, "mode")) {
     977           0 :                 if (*p == '=') {
     978           0 :                     p++;
     979           0 :                     get_word_sep(buf, sizeof(buf), ";, ", &p);
     980           0 :                     if (!strcmp(buf, "record") ||
     981           0 :                         !strcmp(buf, "receive"))
     982           0 :                         th->mode_record = 1;
     983             :                 }
     984             :             }
     985             : 
     986           0 :             while (*p != ';' && *p != '\0' && *p != ',')
     987           0 :                 p++;
     988           0 :             if (*p == ';')
     989           0 :                 p++;
     990             :         }
     991           0 :         if (*p == ',')
     992           0 :             p++;
     993             : 
     994           0 :         reply->nb_transports++;
     995           0 :         if (reply->nb_transports >= RTSP_MAX_TRANSPORTS)
     996           0 :             break;
     997             :     }
     998           0 : }
     999             : 
    1000           0 : static void handle_rtp_info(RTSPState *rt, const char *url,
    1001             :                             uint32_t seq, uint32_t rtptime)
    1002             : {
    1003             :     int i;
    1004           0 :     if (!rtptime || !url[0])
    1005           0 :         return;
    1006           0 :     if (rt->transport != RTSP_TRANSPORT_RTP)
    1007           0 :         return;
    1008           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
    1009           0 :         RTSPStream *rtsp_st = rt->rtsp_streams[i];
    1010           0 :         RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
    1011           0 :         if (!rtpctx)
    1012           0 :             continue;
    1013           0 :         if (!strcmp(rtsp_st->control_url, url)) {
    1014           0 :             rtpctx->base_timestamp = rtptime;
    1015           0 :             break;
    1016             :         }
    1017             :     }
    1018             : }
    1019             : 
    1020           0 : static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
    1021             : {
    1022           0 :     int read = 0;
    1023           0 :     char key[20], value[1024], url[1024] = "";
    1024           0 :     uint32_t seq = 0, rtptime = 0;
    1025             : 
    1026             :     for (;;) {
    1027           0 :         p += strspn(p, SPACE_CHARS);
    1028           0 :         if (!*p)
    1029           0 :             break;
    1030           0 :         get_word_sep(key, sizeof(key), "=", &p);
    1031           0 :         if (*p != '=')
    1032           0 :             break;
    1033           0 :         p++;
    1034           0 :         get_word_sep(value, sizeof(value), ";, ", &p);
    1035           0 :         read++;
    1036           0 :         if (!strcmp(key, "url"))
    1037           0 :             av_strlcpy(url, value, sizeof(url));
    1038           0 :         else if (!strcmp(key, "seq"))
    1039           0 :             seq = strtoul(value, NULL, 10);
    1040           0 :         else if (!strcmp(key, "rtptime"))
    1041           0 :             rtptime = strtoul(value, NULL, 10);
    1042           0 :         if (*p == ',') {
    1043           0 :             handle_rtp_info(rt, url, seq, rtptime);
    1044           0 :             url[0] = '\0';
    1045           0 :             seq = rtptime = 0;
    1046           0 :             read = 0;
    1047             :         }
    1048           0 :         if (*p)
    1049           0 :             p++;
    1050             :     }
    1051           0 :     if (read > 0)
    1052           0 :         handle_rtp_info(rt, url, seq, rtptime);
    1053           0 : }
    1054             : 
    1055           0 : void ff_rtsp_parse_line(AVFormatContext *s,
    1056             :                         RTSPMessageHeader *reply, const char *buf,
    1057             :                         RTSPState *rt, const char *method)
    1058             : {
    1059             :     const char *p;
    1060             : 
    1061             :     /* NOTE: we do case independent match for broken servers */
    1062           0 :     p = buf;
    1063           0 :     if (av_stristart(p, "Session:", &p)) {
    1064             :         int t;
    1065           0 :         get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
    1066           0 :         if (av_stristart(p, ";timeout=", &p) &&
    1067           0 :             (t = strtol(p, NULL, 10)) > 0) {
    1068           0 :             reply->timeout = t;
    1069             :         }
    1070           0 :     } else if (av_stristart(p, "Content-Length:", &p)) {
    1071           0 :         reply->content_length = strtol(p, NULL, 10);
    1072           0 :     } else if (av_stristart(p, "Transport:", &p)) {
    1073           0 :         rtsp_parse_transport(s, reply, p);
    1074           0 :     } else if (av_stristart(p, "CSeq:", &p)) {
    1075           0 :         reply->seq = strtol(p, NULL, 10);
    1076           0 :     } else if (av_stristart(p, "Range:", &p)) {
    1077           0 :         rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
    1078           0 :     } else if (av_stristart(p, "RealChallenge1:", &p)) {
    1079           0 :         p += strspn(p, SPACE_CHARS);
    1080           0 :         av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
    1081           0 :     } else if (av_stristart(p, "Server:", &p)) {
    1082           0 :         p += strspn(p, SPACE_CHARS);
    1083           0 :         av_strlcpy(reply->server, p, sizeof(reply->server));
    1084           0 :     } else if (av_stristart(p, "Notice:", &p) ||
    1085           0 :                av_stristart(p, "X-Notice:", &p)) {
    1086           0 :         reply->notice = strtol(p, NULL, 10);
    1087           0 :     } else if (av_stristart(p, "Location:", &p)) {
    1088           0 :         p += strspn(p, SPACE_CHARS);
    1089           0 :         av_strlcpy(reply->location, p , sizeof(reply->location));
    1090           0 :     } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
    1091           0 :         p += strspn(p, SPACE_CHARS);
    1092           0 :         ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
    1093           0 :     } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
    1094           0 :         p += strspn(p, SPACE_CHARS);
    1095           0 :         ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
    1096           0 :     } else if (av_stristart(p, "Content-Base:", &p) && rt) {
    1097           0 :         p += strspn(p, SPACE_CHARS);
    1098           0 :         if (method && !strcmp(method, "DESCRIBE"))
    1099           0 :             av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
    1100           0 :     } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
    1101           0 :         p += strspn(p, SPACE_CHARS);
    1102           0 :         if (method && !strcmp(method, "PLAY"))
    1103           0 :             rtsp_parse_rtp_info(rt, p);
    1104           0 :     } else if (av_stristart(p, "Public:", &p) && rt) {
    1105           0 :         if (strstr(p, "GET_PARAMETER") &&
    1106           0 :             method && !strcmp(method, "OPTIONS"))
    1107           0 :             rt->get_parameter_supported = 1;
    1108           0 :     } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
    1109           0 :         p += strspn(p, SPACE_CHARS);
    1110           0 :         rt->accept_dynamic_rate = atoi(p);
    1111           0 :     } else if (av_stristart(p, "Content-Type:", &p)) {
    1112           0 :         p += strspn(p, SPACE_CHARS);
    1113           0 :         av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
    1114             :     }
    1115           0 : }
    1116             : 
    1117             : /* skip a RTP/TCP interleaved packet */
    1118           0 : void ff_rtsp_skip_packet(AVFormatContext *s)
    1119             : {
    1120           0 :     RTSPState *rt = s->priv_data;
    1121             :     int ret, len, len1;
    1122             :     uint8_t buf[1024];
    1123             : 
    1124           0 :     ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
    1125           0 :     if (ret != 3)
    1126           0 :         return;
    1127           0 :     len = AV_RB16(buf + 1);
    1128             : 
    1129           0 :     av_log(s, AV_LOG_TRACE, "skipping RTP packet len=%d\n", len);
    1130             : 
    1131             :     /* skip payload */
    1132           0 :     while (len > 0) {
    1133           0 :         len1 = len;
    1134           0 :         if (len1 > sizeof(buf))
    1135           0 :             len1 = sizeof(buf);
    1136           0 :         ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
    1137           0 :         if (ret != len1)
    1138           0 :             return;
    1139           0 :         len -= len1;
    1140             :     }
    1141             : }
    1142             : 
    1143           0 : int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
    1144             :                        unsigned char **content_ptr,
    1145             :                        int return_on_interleaved_data, const char *method)
    1146             : {
    1147           0 :     RTSPState *rt = s->priv_data;
    1148             :     char buf[4096], buf1[1024], *q;
    1149             :     unsigned char ch;
    1150             :     const char *p;
    1151           0 :     int ret, content_length, line_count = 0, request = 0;
    1152           0 :     unsigned char *content = NULL;
    1153             : 
    1154           0 : start:
    1155           0 :     line_count = 0;
    1156           0 :     request = 0;
    1157           0 :     content = NULL;
    1158           0 :     memset(reply, 0, sizeof(*reply));
    1159             : 
    1160             :     /* parse reply (XXX: use buffers) */
    1161           0 :     rt->last_reply[0] = '\0';
    1162             :     for (;;) {
    1163           0 :         q = buf;
    1164             :         for (;;) {
    1165           0 :             ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
    1166           0 :             av_log(s, AV_LOG_TRACE, "ret=%d c=%02x [%c]\n", ret, ch, ch);
    1167           0 :             if (ret != 1)
    1168           0 :                 return AVERROR_EOF;
    1169           0 :             if (ch == '\n')
    1170           0 :                 break;
    1171           0 :             if (ch == '$' && q == buf) {
    1172           0 :                 if (return_on_interleaved_data) {
    1173           0 :                     return 1;
    1174             :                 } else
    1175           0 :                     ff_rtsp_skip_packet(s);
    1176           0 :             } else if (ch != '\r') {
    1177           0 :                 if ((q - buf) < sizeof(buf) - 1)
    1178           0 :                     *q++ = ch;
    1179             :             }
    1180             :         }
    1181           0 :         *q = '\0';
    1182             : 
    1183           0 :         av_log(s, AV_LOG_TRACE, "line='%s'\n", buf);
    1184             : 
    1185             :         /* test if last line */
    1186           0 :         if (buf[0] == '\0')
    1187           0 :             break;
    1188           0 :         p = buf;
    1189           0 :         if (line_count == 0) {
    1190             :             /* get reply code */
    1191           0 :             get_word(buf1, sizeof(buf1), &p);
    1192           0 :             if (!strncmp(buf1, "RTSP/", 5)) {
    1193           0 :                 get_word(buf1, sizeof(buf1), &p);
    1194           0 :                 reply->status_code = atoi(buf1);
    1195           0 :                 av_strlcpy(reply->reason, p, sizeof(reply->reason));
    1196             :             } else {
    1197           0 :                 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
    1198           0 :                 get_word(buf1, sizeof(buf1), &p); // object
    1199           0 :                 request = 1;
    1200             :             }
    1201             :         } else {
    1202           0 :             ff_rtsp_parse_line(s, reply, p, rt, method);
    1203           0 :             av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
    1204           0 :             av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
    1205             :         }
    1206           0 :         line_count++;
    1207             :     }
    1208             : 
    1209           0 :     if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
    1210           0 :         av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
    1211             : 
    1212           0 :     content_length = reply->content_length;
    1213           0 :     if (content_length > 0) {
    1214             :         /* leave some room for a trailing '\0' (useful for simple parsing) */
    1215           0 :         content = av_malloc(content_length + 1);
    1216           0 :         if (!content)
    1217           0 :             return AVERROR(ENOMEM);
    1218           0 :         ffurl_read_complete(rt->rtsp_hd, content, content_length);
    1219           0 :         content[content_length] = '\0';
    1220             :     }
    1221           0 :     if (content_ptr)
    1222           0 :         *content_ptr = content;
    1223             :     else
    1224           0 :         av_freep(&content);
    1225             : 
    1226           0 :     if (request) {
    1227             :         char buf[1024];
    1228             :         char base64buf[AV_BASE64_SIZE(sizeof(buf))];
    1229           0 :         const char* ptr = buf;
    1230             : 
    1231           0 :         if (!strcmp(reply->reason, "OPTIONS")) {
    1232           0 :             snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
    1233           0 :             if (reply->seq)
    1234           0 :                 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
    1235           0 :             if (reply->session_id[0])
    1236           0 :                 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
    1237           0 :                                               reply->session_id);
    1238             :         } else {
    1239           0 :             snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
    1240             :         }
    1241           0 :         av_strlcat(buf, "\r\n", sizeof(buf));
    1242             : 
    1243           0 :         if (rt->control_transport == RTSP_MODE_TUNNEL) {
    1244           0 :             av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
    1245           0 :             ptr = base64buf;
    1246             :         }
    1247           0 :         ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
    1248             : 
    1249           0 :         rt->last_cmd_time = av_gettime_relative();
    1250             :         /* Even if the request from the server had data, it is not the data
    1251             :          * that the caller wants or expects. The memory could also be leaked
    1252             :          * if the actual following reply has content data. */
    1253           0 :         if (content_ptr)
    1254           0 :             av_freep(content_ptr);
    1255             :         /* If method is set, this is called from ff_rtsp_send_cmd,
    1256             :          * where a reply to exactly this request is awaited. For
    1257             :          * callers from within packet receiving, we just want to
    1258             :          * return to the caller and go back to receiving packets. */
    1259           0 :         if (method)
    1260           0 :             goto start;
    1261           0 :         return 0;
    1262             :     }
    1263             : 
    1264           0 :     if (rt->seq != reply->seq) {
    1265           0 :         av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
    1266             :             rt->seq, reply->seq);
    1267             :     }
    1268             : 
    1269             :     /* EOS */
    1270           0 :     if (reply->notice == 2101 /* End-of-Stream Reached */      ||
    1271           0 :         reply->notice == 2104 /* Start-of-Stream Reached */    ||
    1272           0 :         reply->notice == 2306 /* Continuous Feed Terminated */) {
    1273           0 :         rt->state = RTSP_STATE_IDLE;
    1274           0 :     } else if (reply->notice >= 4400 && reply->notice < 5500) {
    1275           0 :         return AVERROR(EIO); /* data or server error */
    1276           0 :     } else if (reply->notice == 2401 /* Ticket Expired */ ||
    1277           0 :              (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
    1278           0 :         return AVERROR(EPERM);
    1279             : 
    1280           0 :     return 0;
    1281             : }
    1282             : 
    1283             : /**
    1284             :  * Send a command to the RTSP server without waiting for the reply.
    1285             :  *
    1286             :  * @param s RTSP (de)muxer context
    1287             :  * @param method the method for the request
    1288             :  * @param url the target url for the request
    1289             :  * @param headers extra header lines to include in the request
    1290             :  * @param send_content if non-null, the data to send as request body content
    1291             :  * @param send_content_length the length of the send_content data, or 0 if
    1292             :  *                            send_content is null
    1293             :  *
    1294             :  * @return zero if success, nonzero otherwise
    1295             :  */
    1296           0 : static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
    1297             :                                             const char *method, const char *url,
    1298             :                                             const char *headers,
    1299             :                                             const unsigned char *send_content,
    1300             :                                             int send_content_length)
    1301             : {
    1302           0 :     RTSPState *rt = s->priv_data;
    1303             :     char buf[4096], *out_buf;
    1304             :     char base64buf[AV_BASE64_SIZE(sizeof(buf))];
    1305             : 
    1306             :     /* Add in RTSP headers */
    1307           0 :     out_buf = buf;
    1308           0 :     rt->seq++;
    1309           0 :     snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
    1310           0 :     if (headers)
    1311           0 :         av_strlcat(buf, headers, sizeof(buf));
    1312           0 :     av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
    1313           0 :     av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n",  rt->user_agent);
    1314           0 :     if (rt->session_id[0] != '\0' && (!headers ||
    1315           0 :         !strstr(headers, "\nIf-Match:"))) {
    1316           0 :         av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
    1317             :     }
    1318           0 :     if (rt->auth[0]) {
    1319           0 :         char *str = ff_http_auth_create_response(&rt->auth_state,
    1320           0 :                                                  rt->auth, url, method);
    1321           0 :         if (str)
    1322           0 :             av_strlcat(buf, str, sizeof(buf));
    1323           0 :         av_free(str);
    1324             :     }
    1325           0 :     if (send_content_length > 0 && send_content)
    1326           0 :         av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
    1327           0 :     av_strlcat(buf, "\r\n", sizeof(buf));
    1328             : 
    1329             :     /* base64 encode rtsp if tunneling */
    1330           0 :     if (rt->control_transport == RTSP_MODE_TUNNEL) {
    1331           0 :         av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
    1332           0 :         out_buf = base64buf;
    1333             :     }
    1334             : 
    1335           0 :     av_log(s, AV_LOG_TRACE, "Sending:\n%s--\n", buf);
    1336             : 
    1337           0 :     ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
    1338           0 :     if (send_content_length > 0 && send_content) {
    1339           0 :         if (rt->control_transport == RTSP_MODE_TUNNEL) {
    1340           0 :             avpriv_report_missing_feature(s, "Tunneling of RTSP requests with content data");
    1341           0 :             return AVERROR_PATCHWELCOME;
    1342             :         }
    1343           0 :         ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
    1344             :     }
    1345           0 :     rt->last_cmd_time = av_gettime_relative();
    1346             : 
    1347           0 :     return 0;
    1348             : }
    1349             : 
    1350           0 : int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
    1351             :                            const char *url, const char *headers)
    1352             : {
    1353           0 :     return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
    1354             : }
    1355             : 
    1356           0 : int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
    1357             :                      const char *headers, RTSPMessageHeader *reply,
    1358             :                      unsigned char **content_ptr)
    1359             : {
    1360           0 :     return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
    1361             :                                          content_ptr, NULL, 0);
    1362             : }
    1363             : 
    1364           0 : int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
    1365             :                                   const char *method, const char *url,
    1366             :                                   const char *header,
    1367             :                                   RTSPMessageHeader *reply,
    1368             :                                   unsigned char **content_ptr,
    1369             :                                   const unsigned char *send_content,
    1370             :                                   int send_content_length)
    1371             : {
    1372           0 :     RTSPState *rt = s->priv_data;
    1373             :     HTTPAuthType cur_auth_type;
    1374           0 :     int ret, attempts = 0;
    1375             : 
    1376           0 : retry:
    1377           0 :     cur_auth_type = rt->auth_state.auth_type;
    1378           0 :     if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
    1379             :                                                 send_content,
    1380             :                                                 send_content_length)))
    1381           0 :         return ret;
    1382             : 
    1383           0 :     if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
    1384           0 :         return ret;
    1385           0 :     attempts++;
    1386             : 
    1387           0 :     if (reply->status_code == 401 &&
    1388           0 :         (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
    1389           0 :         rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
    1390           0 :         goto retry;
    1391             : 
    1392           0 :     if (reply->status_code > 400){
    1393           0 :         av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
    1394             :                method,
    1395           0 :                reply->status_code,
    1396           0 :                reply->reason);
    1397           0 :         av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
    1398             :     }
    1399             : 
    1400           0 :     return 0;
    1401             : }
    1402             : 
    1403           0 : int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
    1404             :                               int lower_transport, const char *real_challenge)
    1405             : {
    1406           0 :     RTSPState *rt = s->priv_data;
    1407           0 :     int rtx = 0, j, i, err, interleave = 0, port_off;
    1408             :     RTSPStream *rtsp_st;
    1409           0 :     RTSPMessageHeader reply1, *reply = &reply1;
    1410             :     char cmd[2048];
    1411             :     const char *trans_pref;
    1412             : 
    1413           0 :     if (rt->transport == RTSP_TRANSPORT_RDT)
    1414           0 :         trans_pref = "x-pn-tng";
    1415           0 :     else if (rt->transport == RTSP_TRANSPORT_RAW)
    1416           0 :         trans_pref = "RAW/RAW";
    1417             :     else
    1418           0 :         trans_pref = "RTP/AVP";
    1419             : 
    1420             :     /* default timeout: 1 minute */
    1421           0 :     rt->timeout = 60;
    1422             : 
    1423             :     /* Choose a random starting offset within the first half of the
    1424             :      * port range, to allow for a number of ports to try even if the offset
    1425             :      * happens to be at the end of the random range. */
    1426           0 :     port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
    1427             :     /* even random offset */
    1428           0 :     port_off -= port_off & 0x01;
    1429             : 
    1430           0 :     for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
    1431             :         char transport[2048];
    1432             : 
    1433             :         /*
    1434             :          * WMS serves all UDP data over a single connection, the RTX, which
    1435             :          * isn't necessarily the first in the SDP but has to be the first
    1436             :          * to be set up, else the second/third SETUP will fail with a 461.
    1437             :          */
    1438           0 :         if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
    1439           0 :              rt->server_type == RTSP_SERVER_WMS) {
    1440           0 :             if (i == 0) {
    1441             :                 /* rtx first */
    1442           0 :                 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
    1443           0 :                     int len = strlen(rt->rtsp_streams[rtx]->control_url);
    1444           0 :                     if (len >= 4 &&
    1445           0 :                         !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
    1446             :                                 "/rtx"))
    1447           0 :                         break;
    1448             :                 }
    1449           0 :                 if (rtx == rt->nb_rtsp_streams)
    1450           0 :                     return -1; /* no RTX found */
    1451           0 :                 rtsp_st = rt->rtsp_streams[rtx];
    1452             :             } else
    1453           0 :                 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
    1454             :         } else
    1455           0 :             rtsp_st = rt->rtsp_streams[i];
    1456             : 
    1457             :         /* RTP/UDP */
    1458           0 :         if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
    1459             :             char buf[256];
    1460             : 
    1461           0 :             if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
    1462           0 :                 port = reply->transports[0].client_port_min;
    1463           0 :                 goto have_port;
    1464             :             }
    1465             : 
    1466             :             /* first try in specified port range */
    1467           0 :             while (j <= rt->rtp_port_max) {
    1468           0 :                 AVDictionary *opts = map_to_opts(rt);
    1469             : 
    1470           0 :                 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
    1471             :                             "?localport=%d", j);
    1472             :                 /* we will use two ports per rtp stream (rtp and rtcp) */
    1473           0 :                 j += 2;
    1474           0 :                 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
    1475           0 :                                  &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
    1476             : 
    1477           0 :                 av_dict_free(&opts);
    1478             : 
    1479           0 :                 if (!err)
    1480           0 :                     goto rtp_opened;
    1481             :             }
    1482           0 :             av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
    1483           0 :             err = AVERROR(EIO);
    1484           0 :             goto fail;
    1485             : 
    1486           0 :         rtp_opened:
    1487           0 :             port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
    1488           0 :         have_port:
    1489           0 :             snprintf(transport, sizeof(transport) - 1,
    1490             :                      "%s/UDP;", trans_pref);
    1491           0 :             if (rt->server_type != RTSP_SERVER_REAL)
    1492           0 :                 av_strlcat(transport, "unicast;", sizeof(transport));
    1493           0 :             av_strlcatf(transport, sizeof(transport),
    1494             :                      "client_port=%d", port);
    1495           0 :             if (rt->transport == RTSP_TRANSPORT_RTP &&
    1496           0 :                 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
    1497           0 :                 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
    1498             :         }
    1499             : 
    1500             :         /* RTP/TCP */
    1501           0 :         else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
    1502             :             /* For WMS streams, the application streams are only used for
    1503             :              * UDP. When trying to set it up for TCP streams, the server
    1504             :              * will return an error. Therefore, we skip those streams. */
    1505           0 :             if (rt->server_type == RTSP_SERVER_WMS &&
    1506           0 :                 (rtsp_st->stream_index < 0 ||
    1507           0 :                  s->streams[rtsp_st->stream_index]->codecpar->codec_type ==
    1508             :                     AVMEDIA_TYPE_DATA))
    1509           0 :                 continue;
    1510           0 :             snprintf(transport, sizeof(transport) - 1,
    1511             :                      "%s/TCP;", trans_pref);
    1512           0 :             if (rt->transport != RTSP_TRANSPORT_RDT)
    1513           0 :                 av_strlcat(transport, "unicast;", sizeof(transport));
    1514           0 :             av_strlcatf(transport, sizeof(transport),
    1515             :                         "interleaved=%d-%d",
    1516             :                         interleave, interleave + 1);
    1517           0 :             interleave += 2;
    1518             :         }
    1519             : 
    1520           0 :         else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
    1521           0 :             snprintf(transport, sizeof(transport) - 1,
    1522             :                      "%s/UDP;multicast", trans_pref);
    1523             :         }
    1524           0 :         if (s->oformat) {
    1525           0 :             av_strlcat(transport, ";mode=record", sizeof(transport));
    1526           0 :         } else if (rt->server_type == RTSP_SERVER_REAL ||
    1527           0 :                    rt->server_type == RTSP_SERVER_WMS)
    1528           0 :             av_strlcat(transport, ";mode=play", sizeof(transport));
    1529           0 :         snprintf(cmd, sizeof(cmd),
    1530             :                  "Transport: %s\r\n",
    1531             :                  transport);
    1532           0 :         if (rt->accept_dynamic_rate)
    1533           0 :             av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
    1534           0 :         if (CONFIG_RTPDEC && i == 0 && rt->server_type == RTSP_SERVER_REAL) {
    1535             :             char real_res[41], real_csum[9];
    1536           0 :             ff_rdt_calc_response_and_checksum(real_res, real_csum,
    1537             :                                               real_challenge);
    1538           0 :             av_strlcatf(cmd, sizeof(cmd),
    1539             :                         "If-Match: %s\r\n"
    1540             :                         "RealChallenge2: %s, sd=%s\r\n",
    1541           0 :                         rt->session_id, real_res, real_csum);
    1542             :         }
    1543           0 :         ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
    1544           0 :         if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
    1545           0 :             err = 1;
    1546           0 :             goto fail;
    1547           0 :         } else if (reply->status_code != RTSP_STATUS_OK ||
    1548           0 :                    reply->nb_transports != 1) {
    1549           0 :             err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
    1550           0 :             goto fail;
    1551             :         }
    1552             : 
    1553             :         /* XXX: same protocol for all streams is required */
    1554           0 :         if (i > 0) {
    1555           0 :             if (reply->transports[0].lower_transport != rt->lower_transport ||
    1556           0 :                 reply->transports[0].transport != rt->transport) {
    1557           0 :                 err = AVERROR_INVALIDDATA;
    1558           0 :                 goto fail;
    1559             :             }
    1560             :         } else {
    1561           0 :             rt->lower_transport = reply->transports[0].lower_transport;
    1562           0 :             rt->transport = reply->transports[0].transport;
    1563             :         }
    1564             : 
    1565             :         /* Fail if the server responded with another lower transport mode
    1566             :          * than what we requested. */
    1567           0 :         if (reply->transports[0].lower_transport != lower_transport) {
    1568           0 :             av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
    1569           0 :             err = AVERROR_INVALIDDATA;
    1570           0 :             goto fail;
    1571             :         }
    1572             : 
    1573           0 :         switch(reply->transports[0].lower_transport) {
    1574           0 :         case RTSP_LOWER_TRANSPORT_TCP:
    1575           0 :             rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
    1576           0 :             rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
    1577           0 :             break;
    1578             : 
    1579           0 :         case RTSP_LOWER_TRANSPORT_UDP: {
    1580           0 :             char url[1024], options[30] = "";
    1581           0 :             const char *peer = host;
    1582             : 
    1583           0 :             if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
    1584           0 :                 av_strlcpy(options, "?connect=1", sizeof(options));
    1585             :             /* Use source address if specified */
    1586           0 :             if (reply->transports[0].source[0])
    1587           0 :                 peer = reply->transports[0].source;
    1588           0 :             ff_url_join(url, sizeof(url), "rtp", NULL, peer,
    1589             :                         reply->transports[0].server_port_min, "%s", options);
    1590           0 :             if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
    1591           0 :                 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
    1592           0 :                 err = AVERROR_INVALIDDATA;
    1593           0 :                 goto fail;
    1594             :             }
    1595           0 :             break;
    1596             :         }
    1597           0 :         case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
    1598           0 :             char url[1024], namebuf[50], optbuf[20] = "";
    1599             :             struct sockaddr_storage addr;
    1600             :             int port, ttl;
    1601             : 
    1602           0 :             if (reply->transports[0].destination.ss_family) {
    1603           0 :                 addr      = reply->transports[0].destination;
    1604           0 :                 port      = reply->transports[0].port_min;
    1605           0 :                 ttl       = reply->transports[0].ttl;
    1606             :             } else {
    1607           0 :                 addr      = rtsp_st->sdp_ip;
    1608           0 :                 port      = rtsp_st->sdp_port;
    1609           0 :                 ttl       = rtsp_st->sdp_ttl;
    1610             :             }
    1611           0 :             if (ttl > 0)
    1612           0 :                 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
    1613           0 :             getnameinfo((struct sockaddr*) &addr, sizeof(addr),
    1614             :                         namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
    1615           0 :             ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
    1616             :                         port, "%s", optbuf);
    1617           0 :             if (ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
    1618           0 :                            &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL) < 0) {
    1619           0 :                 err = AVERROR_INVALIDDATA;
    1620           0 :                 goto fail;
    1621             :             }
    1622           0 :             break;
    1623             :         }
    1624             :         }
    1625             : 
    1626           0 :         if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
    1627           0 :             goto fail;
    1628             :     }
    1629             : 
    1630           0 :     if (rt->nb_rtsp_streams && reply->timeout > 0)
    1631           0 :         rt->timeout = reply->timeout;
    1632             : 
    1633           0 :     if (rt->server_type == RTSP_SERVER_REAL)
    1634           0 :         rt->need_subscription = 1;
    1635             : 
    1636           0 :     return 0;
    1637             : 
    1638           0 : fail:
    1639           0 :     ff_rtsp_undo_setup(s, 0);
    1640           0 :     return err;
    1641             : }
    1642             : 
    1643           0 : void ff_rtsp_close_connections(AVFormatContext *s)
    1644             : {
    1645           0 :     RTSPState *rt = s->priv_data;
    1646           0 :     if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
    1647           0 :     ffurl_close(rt->rtsp_hd);
    1648           0 :     rt->rtsp_hd = rt->rtsp_hd_out = NULL;
    1649           0 : }
    1650             : 
    1651           0 : int ff_rtsp_connect(AVFormatContext *s)
    1652             : {
    1653           0 :     RTSPState *rt = s->priv_data;
    1654             :     char proto[128], host[1024], path[1024];
    1655             :     char tcpname[1024], cmd[2048], auth[128];
    1656           0 :     const char *lower_rtsp_proto = "tcp";
    1657             :     int port, err, tcp_fd;
    1658           0 :     RTSPMessageHeader reply1 = {0}, *reply = &reply1;
    1659           0 :     int lower_transport_mask = 0;
    1660           0 :     int default_port = RTSP_DEFAULT_PORT;
    1661           0 :     char real_challenge[64] = "";
    1662             :     struct sockaddr_storage peer;
    1663           0 :     socklen_t peer_len = sizeof(peer);
    1664             : 
    1665           0 :     if (rt->rtp_port_max < rt->rtp_port_min) {
    1666           0 :         av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
    1667             :                                 "than min port %d\n", rt->rtp_port_max,
    1668             :                                                       rt->rtp_port_min);
    1669           0 :         return AVERROR(EINVAL);
    1670             :     }
    1671             : 
    1672           0 :     if (!ff_network_init())
    1673           0 :         return AVERROR(EIO);
    1674             : 
    1675           0 :     if (s->max_delay < 0) /* Not set by the caller */
    1676           0 :         s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
    1677             : 
    1678           0 :     rt->control_transport = RTSP_MODE_PLAIN;
    1679           0 :     if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
    1680           0 :         rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
    1681           0 :         rt->control_transport = RTSP_MODE_TUNNEL;
    1682             :     }
    1683             :     /* Only pass through valid flags from here */
    1684           0 :     rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
    1685             : 
    1686           0 : redirect:
    1687             :     /* extract hostname and port */
    1688           0 :     av_url_split(proto, sizeof(proto), auth, sizeof(auth),
    1689           0 :                  host, sizeof(host), &port, path, sizeof(path), s->filename);
    1690             : 
    1691           0 :     if (!strcmp(proto, "rtsps")) {
    1692           0 :         lower_rtsp_proto         = "tls";
    1693           0 :         default_port             = RTSPS_DEFAULT_PORT;
    1694           0 :         rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
    1695             :     }
    1696             : 
    1697           0 :     if (*auth) {
    1698           0 :         av_strlcpy(rt->auth, auth, sizeof(rt->auth));
    1699             :     }
    1700           0 :     if (port < 0)
    1701           0 :         port = default_port;
    1702             : 
    1703           0 :     lower_transport_mask = rt->lower_transport_mask;
    1704             : 
    1705           0 :     if (!lower_transport_mask)
    1706           0 :         lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
    1707             : 
    1708           0 :     if (s->oformat) {
    1709             :         /* Only UDP or TCP - UDP multicast isn't supported. */
    1710           0 :         lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
    1711             :                                 (1 << RTSP_LOWER_TRANSPORT_TCP);
    1712           0 :         if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
    1713           0 :             av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
    1714             :                                     "only UDP and TCP are supported for output.\n");
    1715           0 :             err = AVERROR(EINVAL);
    1716           0 :             goto fail;
    1717             :         }
    1718             :     }
    1719             : 
    1720             :     /* Construct the URI used in request; this is similar to s->filename,
    1721             :      * but with authentication credentials removed and RTSP specific options
    1722             :      * stripped out. */
    1723           0 :     ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
    1724             :                 host, port, "%s", path);
    1725             : 
    1726           0 :     if (rt->control_transport == RTSP_MODE_TUNNEL) {
    1727             :         /* set up initial handshake for tunneling */
    1728             :         char httpname[1024];
    1729             :         char sessioncookie[17];
    1730             :         char headers[1024];
    1731             : 
    1732           0 :         ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
    1733           0 :         snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
    1734             :                  av_get_random_seed(), av_get_random_seed());
    1735             : 
    1736             :         /* GET requests */
    1737           0 :         if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
    1738           0 :                         &s->interrupt_callback) < 0) {
    1739           0 :             err = AVERROR(EIO);
    1740           0 :             goto fail;
    1741             :         }
    1742             : 
    1743             :         /* generate GET headers */
    1744           0 :         snprintf(headers, sizeof(headers),
    1745             :                  "x-sessioncookie: %s\r\n"
    1746             :                  "Accept: application/x-rtsp-tunnelled\r\n"
    1747             :                  "Pragma: no-cache\r\n"
    1748             :                  "Cache-Control: no-cache\r\n",
    1749             :                  sessioncookie);
    1750           0 :         av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
    1751             : 
    1752           0 :         if (!rt->rtsp_hd->protocol_whitelist && s->protocol_whitelist) {
    1753           0 :             rt->rtsp_hd->protocol_whitelist = av_strdup(s->protocol_whitelist);
    1754           0 :             if (!rt->rtsp_hd->protocol_whitelist) {
    1755           0 :                 err = AVERROR(ENOMEM);
    1756           0 :                 goto fail;
    1757             :             }
    1758             :         }
    1759             : 
    1760             :         /* complete the connection */
    1761           0 :         if (ffurl_connect(rt->rtsp_hd, NULL)) {
    1762           0 :             err = AVERROR(EIO);
    1763           0 :             goto fail;
    1764             :         }
    1765             : 
    1766             :         /* POST requests */
    1767           0 :         if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
    1768           0 :                         &s->interrupt_callback) < 0 ) {
    1769           0 :             err = AVERROR(EIO);
    1770           0 :             goto fail;
    1771             :         }
    1772             : 
    1773             :         /* generate POST headers */
    1774           0 :         snprintf(headers, sizeof(headers),
    1775             :                  "x-sessioncookie: %s\r\n"
    1776             :                  "Content-Type: application/x-rtsp-tunnelled\r\n"
    1777             :                  "Pragma: no-cache\r\n"
    1778             :                  "Cache-Control: no-cache\r\n"
    1779             :                  "Content-Length: 32767\r\n"
    1780             :                  "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
    1781             :                  sessioncookie);
    1782           0 :         av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
    1783           0 :         av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
    1784             : 
    1785             :         /* Initialize the authentication state for the POST session. The HTTP
    1786             :          * protocol implementation doesn't properly handle multi-pass
    1787             :          * authentication for POST requests, since it would require one of
    1788             :          * the following:
    1789             :          * - implementing Expect: 100-continue, which many HTTP servers
    1790             :          *   don't support anyway, even less the RTSP servers that do HTTP
    1791             :          *   tunneling
    1792             :          * - sending the whole POST data until getting a 401 reply specifying
    1793             :          *   what authentication method to use, then resending all that data
    1794             :          * - waiting for potential 401 replies directly after sending the
    1795             :          *   POST header (waiting for some unspecified time)
    1796             :          * Therefore, we copy the full auth state, which works for both basic
    1797             :          * and digest. (For digest, we would have to synchronize the nonce
    1798             :          * count variable between the two sessions, if we'd do more requests
    1799             :          * with the original session, though.)
    1800             :          */
    1801           0 :         ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
    1802             : 
    1803             :         /* complete the connection */
    1804           0 :         if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
    1805           0 :             err = AVERROR(EIO);
    1806           0 :             goto fail;
    1807             :         }
    1808             :     } else {
    1809             :         int ret;
    1810             :         /* open the tcp connection */
    1811           0 :         ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
    1812             :                     host, port,
    1813             :                     "?timeout=%d", rt->stimeout);
    1814           0 :         if ((ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
    1815           0 :                        &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL)) < 0) {
    1816           0 :             err = ret;
    1817           0 :             goto fail;
    1818             :         }
    1819           0 :         rt->rtsp_hd_out = rt->rtsp_hd;
    1820             :     }
    1821           0 :     rt->seq = 0;
    1822             : 
    1823           0 :     tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
    1824           0 :     if (tcp_fd < 0) {
    1825           0 :         err = tcp_fd;
    1826           0 :         goto fail;
    1827             :     }
    1828           0 :     if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
    1829           0 :         getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
    1830             :                     NULL, 0, NI_NUMERICHOST);
    1831             :     }
    1832             : 
    1833             :     /* request options supported by the server; this also detects server
    1834             :      * type */
    1835           0 :     for (rt->server_type = RTSP_SERVER_RTP;;) {
    1836           0 :         cmd[0] = 0;
    1837           0 :         if (rt->server_type == RTSP_SERVER_REAL)
    1838           0 :             av_strlcat(cmd,
    1839             :                        /*
    1840             :                         * The following entries are required for proper
    1841             :                         * streaming from a Realmedia server. They are
    1842             :                         * interdependent in some way although we currently
    1843             :                         * don't quite understand how. Values were copied
    1844             :                         * from mplayer SVN r23589.
    1845             :                         *   ClientChallenge is a 16-byte ID in hex
    1846             :                         *   CompanyID is a 16-byte ID in base64
    1847             :                         */
    1848             :                        "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
    1849             :                        "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
    1850             :                        "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
    1851             :                        "GUID: 00000000-0000-0000-0000-000000000000\r\n",
    1852             :                        sizeof(cmd));
    1853           0 :         ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
    1854           0 :         if (reply->status_code != RTSP_STATUS_OK) {
    1855           0 :             err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
    1856           0 :             goto fail;
    1857             :         }
    1858             : 
    1859             :         /* detect server type if not standard-compliant RTP */
    1860           0 :         if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
    1861           0 :             rt->server_type = RTSP_SERVER_REAL;
    1862           0 :             continue;
    1863           0 :         } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
    1864           0 :             rt->server_type = RTSP_SERVER_WMS;
    1865           0 :         } else if (rt->server_type == RTSP_SERVER_REAL)
    1866           0 :             strcpy(real_challenge, reply->real_challenge);
    1867           0 :         break;
    1868             :     }
    1869             : 
    1870           0 :     if (CONFIG_RTSP_DEMUXER && s->iformat)
    1871           0 :         err = ff_rtsp_setup_input_streams(s, reply);
    1872             :     else if (CONFIG_RTSP_MUXER)
    1873           0 :         err = ff_rtsp_setup_output_streams(s, host);
    1874             :     else
    1875             :         av_assert0(0);
    1876           0 :     if (err)
    1877           0 :         goto fail;
    1878             : 
    1879             :     do {
    1880           0 :         int lower_transport = ff_log2_tab[lower_transport_mask &
    1881           0 :                                   ~(lower_transport_mask - 1)];
    1882             : 
    1883           0 :         if ((lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP))
    1884           0 :                 && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP))
    1885           0 :             lower_transport = RTSP_LOWER_TRANSPORT_TCP;
    1886             : 
    1887           0 :         err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
    1888           0 :                                  rt->server_type == RTSP_SERVER_REAL ?
    1889             :                                      real_challenge : NULL);
    1890           0 :         if (err < 0)
    1891           0 :             goto fail;
    1892           0 :         lower_transport_mask &= ~(1 << lower_transport);
    1893           0 :         if (lower_transport_mask == 0 && err == 1) {
    1894           0 :             err = AVERROR(EPROTONOSUPPORT);
    1895           0 :             goto fail;
    1896             :         }
    1897           0 :     } while (err);
    1898             : 
    1899           0 :     rt->lower_transport_mask = lower_transport_mask;
    1900           0 :     av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
    1901           0 :     rt->state = RTSP_STATE_IDLE;
    1902           0 :     rt->seek_timestamp = 0; /* default is to start stream at position zero */
    1903           0 :     return 0;
    1904           0 :  fail:
    1905           0 :     ff_rtsp_close_streams(s);
    1906           0 :     ff_rtsp_close_connections(s);
    1907           0 :     if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
    1908           0 :         av_strlcpy(s->filename, reply->location, sizeof(s->filename));
    1909           0 :         rt->session_id[0] = '\0';
    1910           0 :         av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
    1911           0 :                reply->status_code,
    1912           0 :                s->filename);
    1913           0 :         goto redirect;
    1914             :     }
    1915           0 :     ff_network_close();
    1916           0 :     return err;
    1917             : }
    1918             : #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
    1919             : 
    1920             : #if CONFIG_RTPDEC
    1921           0 : static int parse_rtsp_message(AVFormatContext *s)
    1922             : {
    1923           0 :     RTSPState *rt = s->priv_data;
    1924             :     int ret;
    1925             : 
    1926           0 :     if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
    1927           0 :         if (rt->state == RTSP_STATE_STREAMING) {
    1928           0 :             if (!ff_rtsp_parse_streaming_commands(s))
    1929           0 :                 return AVERROR_EOF;
    1930             :             else
    1931           0 :                 av_log(s, AV_LOG_WARNING,
    1932             :                        "Unable to answer to TEARDOWN\n");
    1933             :         } else
    1934           0 :             return 0;
    1935             :     } else {
    1936             :         RTSPMessageHeader reply;
    1937           0 :         ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
    1938           0 :         if (ret < 0)
    1939           0 :             return ret;
    1940             :         /* XXX: parse message */
    1941           0 :         if (rt->state != RTSP_STATE_STREAMING)
    1942           0 :             return 0;
    1943             :     }
    1944             : 
    1945           0 :     return 0;
    1946             : }
    1947             : 
    1948           0 : static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
    1949             :                            uint8_t *buf, int buf_size, int64_t wait_end)
    1950             : {
    1951           0 :     RTSPState *rt = s->priv_data;
    1952             :     RTSPStream *rtsp_st;
    1953           0 :     int n, i, ret, timeout_cnt = 0;
    1954           0 :     struct pollfd *p = rt->p;
    1955           0 :     int *fds = NULL, fdsnum, fdsidx;
    1956             : 
    1957           0 :     if (!p) {
    1958           0 :         p = rt->p = av_malloc_array(2 * (rt->nb_rtsp_streams + 1), sizeof(struct pollfd));
    1959           0 :         if (!p)
    1960           0 :             return AVERROR(ENOMEM);
    1961             : 
    1962           0 :         if (rt->rtsp_hd) {
    1963           0 :             p[rt->max_p].fd = ffurl_get_file_handle(rt->rtsp_hd);
    1964           0 :             p[rt->max_p++].events = POLLIN;
    1965             :         }
    1966           0 :         for (i = 0; i < rt->nb_rtsp_streams; i++) {
    1967           0 :             rtsp_st = rt->rtsp_streams[i];
    1968           0 :             if (rtsp_st->rtp_handle) {
    1969           0 :                 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
    1970             :                                                       &fds, &fdsnum)) {
    1971           0 :                     av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
    1972           0 :                     return ret;
    1973             :                 }
    1974           0 :                 if (fdsnum != 2) {
    1975           0 :                     av_log(s, AV_LOG_ERROR,
    1976             :                            "Number of fds %d not supported\n", fdsnum);
    1977           0 :                     return AVERROR_INVALIDDATA;
    1978             :                 }
    1979           0 :                 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
    1980           0 :                     p[rt->max_p].fd       = fds[fdsidx];
    1981           0 :                     p[rt->max_p++].events = POLLIN;
    1982             :                 }
    1983           0 :                 av_freep(&fds);
    1984             :             }
    1985             :         }
    1986             :     }
    1987             : 
    1988             :     for (;;) {
    1989           0 :         if (ff_check_interrupt(&s->interrupt_callback))
    1990           0 :             return AVERROR_EXIT;
    1991           0 :         if (wait_end && wait_end - av_gettime_relative() < 0)
    1992           0 :             return AVERROR(EAGAIN);
    1993           0 :         n = poll(p, rt->max_p, POLL_TIMEOUT_MS);
    1994           0 :         if (n > 0) {
    1995           0 :             int j = rt->rtsp_hd ? 1 : 0;
    1996           0 :             timeout_cnt = 0;
    1997           0 :             for (i = 0; i < rt->nb_rtsp_streams; i++) {
    1998           0 :                 rtsp_st = rt->rtsp_streams[i];
    1999           0 :                 if (rtsp_st->rtp_handle) {
    2000           0 :                     if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
    2001           0 :                         ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
    2002           0 :                         if (ret > 0) {
    2003           0 :                             *prtsp_st = rtsp_st;
    2004           0 :                             return ret;
    2005             :                         }
    2006             :                     }
    2007           0 :                     j+=2;
    2008             :                 }
    2009             :             }
    2010             : #if CONFIG_RTSP_DEMUXER
    2011           0 :             if (rt->rtsp_hd && p[0].revents & POLLIN) {
    2012           0 :                 if ((ret = parse_rtsp_message(s)) < 0) {
    2013           0 :                     return ret;
    2014             :                 }
    2015             :             }
    2016             : #endif
    2017           0 :         } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
    2018           0 :             return AVERROR(ETIMEDOUT);
    2019           0 :         } else if (n < 0 && errno != EINTR)
    2020           0 :             return AVERROR(errno);
    2021             :     }
    2022             : }
    2023             : 
    2024           0 : static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
    2025             :                        const uint8_t *buf, int len)
    2026             : {
    2027           0 :     RTSPState *rt = s->priv_data;
    2028             :     int i;
    2029           0 :     if (len < 0)
    2030           0 :         return len;
    2031           0 :     if (rt->nb_rtsp_streams == 1) {
    2032           0 :         *rtsp_st = rt->rtsp_streams[0];
    2033           0 :         return len;
    2034             :     }
    2035           0 :     if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
    2036           0 :         if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
    2037           0 :             int no_ssrc = 0;
    2038           0 :             for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2039           0 :                 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
    2040           0 :                 if (!rtpctx)
    2041           0 :                     continue;
    2042           0 :                 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
    2043           0 :                     *rtsp_st = rt->rtsp_streams[i];
    2044           0 :                     return len;
    2045             :                 }
    2046           0 :                 if (!rtpctx->ssrc)
    2047           0 :                     no_ssrc = 1;
    2048             :             }
    2049           0 :             if (no_ssrc) {
    2050           0 :                 av_log(s, AV_LOG_WARNING,
    2051             :                        "Unable to pick stream for packet - SSRC not known for "
    2052             :                        "all streams\n");
    2053           0 :                 return AVERROR(EAGAIN);
    2054             :             }
    2055             :         } else {
    2056           0 :             for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2057           0 :                 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
    2058           0 :                     *rtsp_st = rt->rtsp_streams[i];
    2059           0 :                     return len;
    2060             :                 }
    2061             :             }
    2062             :         }
    2063             :     }
    2064           0 :     av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
    2065           0 :     return AVERROR(EAGAIN);
    2066             : }
    2067             : 
    2068           0 : static int read_packet(AVFormatContext *s,
    2069             :                        RTSPStream **rtsp_st, RTSPStream *first_queue_st,
    2070             :                        int64_t wait_end)
    2071             : {
    2072           0 :     RTSPState *rt = s->priv_data;
    2073             :     int len;
    2074             : 
    2075           0 :     switch(rt->lower_transport) {
    2076           0 :     default:
    2077             : #if CONFIG_RTSP_DEMUXER
    2078             :     case RTSP_LOWER_TRANSPORT_TCP:
    2079           0 :         len = ff_rtsp_tcp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE);
    2080           0 :         break;
    2081             : #endif
    2082           0 :     case RTSP_LOWER_TRANSPORT_UDP:
    2083             :     case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
    2084           0 :         len = udp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
    2085           0 :         if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
    2086           0 :             ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, (*rtsp_st)->rtp_handle, NULL, len);
    2087           0 :         break;
    2088           0 :     case RTSP_LOWER_TRANSPORT_CUSTOM:
    2089           0 :         if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
    2090           0 :             wait_end && wait_end < av_gettime_relative())
    2091           0 :             len = AVERROR(EAGAIN);
    2092             :         else
    2093           0 :             len = avio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
    2094           0 :         len = pick_stream(s, rtsp_st, rt->recvbuf, len);
    2095           0 :         if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
    2096           0 :             ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, NULL, s->pb, len);
    2097           0 :         break;
    2098             :     }
    2099             : 
    2100           0 :     if (len == 0)
    2101           0 :         return AVERROR_EOF;
    2102             : 
    2103           0 :     return len;
    2104             : }
    2105             : 
    2106           0 : int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
    2107             : {
    2108           0 :     RTSPState *rt = s->priv_data;
    2109             :     int ret, len;
    2110           0 :     RTSPStream *rtsp_st, *first_queue_st = NULL;
    2111           0 :     int64_t wait_end = 0;
    2112             : 
    2113           0 :     if (rt->nb_byes == rt->nb_rtsp_streams)
    2114           0 :         return AVERROR_EOF;
    2115             : 
    2116             :     /* get next frames from the same RTP packet */
    2117           0 :     if (rt->cur_transport_priv) {
    2118           0 :         if (rt->transport == RTSP_TRANSPORT_RDT) {
    2119           0 :             ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
    2120           0 :         } else if (rt->transport == RTSP_TRANSPORT_RTP) {
    2121           0 :             ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
    2122           0 :         } else if (CONFIG_RTPDEC && rt->ts) {
    2123           0 :             ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
    2124           0 :             if (ret >= 0) {
    2125           0 :                 rt->recvbuf_pos += ret;
    2126           0 :                 ret = rt->recvbuf_pos < rt->recvbuf_len;
    2127             :             }
    2128             :         } else
    2129           0 :             ret = -1;
    2130           0 :         if (ret == 0) {
    2131           0 :             rt->cur_transport_priv = NULL;
    2132           0 :             return 0;
    2133           0 :         } else if (ret == 1) {
    2134           0 :             return 0;
    2135             :         } else
    2136           0 :             rt->cur_transport_priv = NULL;
    2137             :     }
    2138             : 
    2139           0 : redo:
    2140           0 :     if (rt->transport == RTSP_TRANSPORT_RTP) {
    2141             :         int i;
    2142           0 :         int64_t first_queue_time = 0;
    2143           0 :         for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2144           0 :             RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
    2145             :             int64_t queue_time;
    2146           0 :             if (!rtpctx)
    2147           0 :                 continue;
    2148           0 :             queue_time = ff_rtp_queued_packet_time(rtpctx);
    2149           0 :             if (queue_time && (queue_time - first_queue_time < 0 ||
    2150             :                                !first_queue_time)) {
    2151           0 :                 first_queue_time = queue_time;
    2152           0 :                 first_queue_st   = rt->rtsp_streams[i];
    2153             :             }
    2154             :         }
    2155           0 :         if (first_queue_time) {
    2156           0 :             wait_end = first_queue_time + s->max_delay;
    2157             :         } else {
    2158           0 :             wait_end = 0;
    2159           0 :             first_queue_st = NULL;
    2160             :         }
    2161             :     }
    2162             : 
    2163             :     /* read next RTP packet */
    2164           0 :     if (!rt->recvbuf) {
    2165           0 :         rt->recvbuf = av_malloc(RECVBUF_SIZE);
    2166           0 :         if (!rt->recvbuf)
    2167           0 :             return AVERROR(ENOMEM);
    2168             :     }
    2169             : 
    2170           0 :     len = read_packet(s, &rtsp_st, first_queue_st, wait_end);
    2171           0 :     if (len == AVERROR(EAGAIN) && first_queue_st &&
    2172           0 :         rt->transport == RTSP_TRANSPORT_RTP) {
    2173           0 :         av_log(s, AV_LOG_WARNING,
    2174             :                 "max delay reached. need to consume packet\n");
    2175           0 :         rtsp_st = first_queue_st;
    2176           0 :         ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
    2177           0 :         goto end;
    2178             :     }
    2179           0 :     if (len < 0)
    2180           0 :         return len;
    2181             : 
    2182           0 :     if (rt->transport == RTSP_TRANSPORT_RDT) {
    2183           0 :         ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
    2184           0 :     } else if (rt->transport == RTSP_TRANSPORT_RTP) {
    2185           0 :         ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
    2186           0 :         if (rtsp_st->feedback) {
    2187           0 :             AVIOContext *pb = NULL;
    2188           0 :             if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
    2189           0 :                 pb = s->pb;
    2190           0 :             ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
    2191             :         }
    2192           0 :         if (ret < 0) {
    2193             :             /* Either bad packet, or a RTCP packet. Check if the
    2194             :              * first_rtcp_ntp_time field was initialized. */
    2195           0 :             RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
    2196           0 :             if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
    2197             :                 /* first_rtcp_ntp_time has been initialized for this stream,
    2198             :                  * copy the same value to all other uninitialized streams,
    2199             :                  * in order to map their timestamp origin to the same ntp time
    2200             :                  * as this one. */
    2201             :                 int i;
    2202           0 :                 AVStream *st = NULL;
    2203           0 :                 if (rtsp_st->stream_index >= 0)
    2204           0 :                     st = s->streams[rtsp_st->stream_index];
    2205           0 :                 for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2206           0 :                     RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
    2207           0 :                     AVStream *st2 = NULL;
    2208           0 :                     if (rt->rtsp_streams[i]->stream_index >= 0)
    2209           0 :                         st2 = s->streams[rt->rtsp_streams[i]->stream_index];
    2210           0 :                     if (rtpctx2 && st && st2 &&
    2211           0 :                         rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
    2212           0 :                         rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
    2213           0 :                         rtpctx2->rtcp_ts_offset = av_rescale_q(
    2214             :                             rtpctx->rtcp_ts_offset, st->time_base,
    2215             :                             st2->time_base);
    2216             :                     }
    2217             :                 }
    2218             :                 // Make real NTP start time available in AVFormatContext
    2219           0 :                 if (s->start_time_realtime == AV_NOPTS_VALUE) {
    2220           0 :                     s->start_time_realtime = av_rescale (rtpctx->first_rtcp_ntp_time - (NTP_OFFSET << 32), 1000000, 1LL << 32);
    2221           0 :                     if (rtpctx->st) {
    2222           0 :                         s->start_time_realtime -=
    2223           0 :                             av_rescale (rtpctx->rtcp_ts_offset,
    2224           0 :                                         (uint64_t) rtpctx->st->time_base.num * 1000000,
    2225           0 :                                                    rtpctx->st->time_base.den);
    2226             :                     }
    2227             :                 }
    2228             :             }
    2229           0 :             if (ret == -RTCP_BYE) {
    2230           0 :                 rt->nb_byes++;
    2231             : 
    2232           0 :                 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
    2233           0 :                        rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
    2234             : 
    2235           0 :                 if (rt->nb_byes == rt->nb_rtsp_streams)
    2236           0 :                     return AVERROR_EOF;
    2237             :             }
    2238             :         }
    2239           0 :     } else if (CONFIG_RTPDEC && rt->ts) {
    2240           0 :         ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
    2241           0 :         if (ret >= 0) {
    2242           0 :             if (ret < len) {
    2243           0 :                 rt->recvbuf_len = len;
    2244           0 :                 rt->recvbuf_pos = ret;
    2245           0 :                 rt->cur_transport_priv = rt->ts;
    2246           0 :                 return 1;
    2247             :             } else {
    2248           0 :                 ret = 0;
    2249             :             }
    2250             :         }
    2251             :     } else {
    2252           0 :         return AVERROR_INVALIDDATA;
    2253             :     }
    2254           0 : end:
    2255           0 :     if (ret < 0)
    2256           0 :         goto redo;
    2257           0 :     if (ret == 1)
    2258             :         /* more packets may follow, so we save the RTP context */
    2259           0 :         rt->cur_transport_priv = rtsp_st->transport_priv;
    2260             : 
    2261           0 :     return ret;
    2262             : }
    2263             : #endif /* CONFIG_RTPDEC */
    2264             : 
    2265             : #if CONFIG_SDP_DEMUXER
    2266        6130 : static int sdp_probe(AVProbeData *p1)
    2267             : {
    2268        6130 :     const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
    2269             : 
    2270             :     /* we look for a line beginning "c=IN IP" */
    2271      284851 :     while (p < p_end && *p != '\0') {
    2272      550702 :         if (sizeof("c=IN IP") - 1 < p_end - p &&
    2273      275332 :             av_strstart(p, "c=IN IP", NULL))
    2274           0 :             return AVPROBE_SCORE_EXTENSION;
    2275             : 
    2276      275370 :         while (p < p_end - 1 && *p != '\n') p++;
    2277      275370 :         if (++p >= p_end)
    2278        2779 :             break;
    2279      272591 :         if (*p == '\r')
    2280        2177 :             p++;
    2281             :     }
    2282        6130 :     return 0;
    2283             : }
    2284             : 
    2285           0 : static void append_source_addrs(char *buf, int size, const char *name,
    2286             :                                 int count, struct RTSPSource **addrs)
    2287             : {
    2288             :     int i;
    2289           0 :     if (!count)
    2290           0 :         return;
    2291           0 :     av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
    2292           0 :     for (i = 1; i < count; i++)
    2293           0 :         av_strlcatf(buf, size, ",%s", addrs[i]->addr);
    2294             : }
    2295             : 
    2296           0 : static int sdp_read_header(AVFormatContext *s)
    2297             : {
    2298           0 :     RTSPState *rt = s->priv_data;
    2299             :     RTSPStream *rtsp_st;
    2300             :     int size, i, err;
    2301             :     char *content;
    2302             :     char url[1024];
    2303             : 
    2304           0 :     if (!ff_network_init())
    2305           0 :         return AVERROR(EIO);
    2306             : 
    2307           0 :     if (s->max_delay < 0) /* Not set by the caller */
    2308           0 :         s->max_delay = DEFAULT_REORDERING_DELAY;
    2309           0 :     if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
    2310           0 :         rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
    2311             : 
    2312             :     /* read the whole sdp file */
    2313             :     /* XXX: better loading */
    2314           0 :     content = av_malloc(SDP_MAX_SIZE);
    2315           0 :     if (!content)
    2316           0 :         return AVERROR(ENOMEM);
    2317           0 :     size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
    2318           0 :     if (size <= 0) {
    2319           0 :         av_free(content);
    2320           0 :         return AVERROR_INVALIDDATA;
    2321             :     }
    2322           0 :     content[size] ='\0';
    2323             : 
    2324           0 :     err = ff_sdp_parse(s, content);
    2325           0 :     av_freep(&content);
    2326           0 :     if (err) goto fail;
    2327             : 
    2328             :     /* open each RTP stream */
    2329           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2330             :         char namebuf[50];
    2331           0 :         rtsp_st = rt->rtsp_streams[i];
    2332             : 
    2333           0 :         if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
    2334           0 :             AVDictionary *opts = map_to_opts(rt);
    2335             : 
    2336           0 :             err = getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip,
    2337             :                               sizeof(rtsp_st->sdp_ip),
    2338             :                               namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
    2339           0 :             if (err) {
    2340           0 :                 av_log(s, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(err));
    2341           0 :                 err = AVERROR(EIO);
    2342           0 :                 av_dict_free(&opts);
    2343           0 :                 goto fail;
    2344             :             }
    2345           0 :             ff_url_join(url, sizeof(url), "rtp", NULL,
    2346             :                         namebuf, rtsp_st->sdp_port,
    2347             :                         "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
    2348             :                         rtsp_st->sdp_port, rtsp_st->sdp_ttl,
    2349           0 :                         rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
    2350           0 :                         rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
    2351             : 
    2352           0 :             append_source_addrs(url, sizeof(url), "sources",
    2353             :                                 rtsp_st->nb_include_source_addrs,
    2354             :                                 rtsp_st->include_source_addrs);
    2355           0 :             append_source_addrs(url, sizeof(url), "block",
    2356             :                                 rtsp_st->nb_exclude_source_addrs,
    2357             :                                 rtsp_st->exclude_source_addrs);
    2358           0 :             err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ,
    2359           0 :                            &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
    2360             : 
    2361           0 :             av_dict_free(&opts);
    2362             : 
    2363           0 :             if (err < 0) {
    2364           0 :                 err = AVERROR_INVALIDDATA;
    2365           0 :                 goto fail;
    2366             :             }
    2367             :         }
    2368           0 :         if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
    2369           0 :             goto fail;
    2370             :     }
    2371           0 :     return 0;
    2372           0 : fail:
    2373           0 :     ff_rtsp_close_streams(s);
    2374           0 :     ff_network_close();
    2375           0 :     return err;
    2376             : }
    2377             : 
    2378           0 : static int sdp_read_close(AVFormatContext *s)
    2379             : {
    2380           0 :     ff_rtsp_close_streams(s);
    2381           0 :     ff_network_close();
    2382           0 :     return 0;
    2383             : }
    2384             : 
    2385             : static const AVClass sdp_demuxer_class = {
    2386             :     .class_name     = "SDP demuxer",
    2387             :     .item_name      = av_default_item_name,
    2388             :     .option         = sdp_options,
    2389             :     .version        = LIBAVUTIL_VERSION_INT,
    2390             : };
    2391             : 
    2392             : AVInputFormat ff_sdp_demuxer = {
    2393             :     .name           = "sdp",
    2394             :     .long_name      = NULL_IF_CONFIG_SMALL("SDP"),
    2395             :     .priv_data_size = sizeof(RTSPState),
    2396             :     .read_probe     = sdp_probe,
    2397             :     .read_header    = sdp_read_header,
    2398             :     .read_packet    = ff_rtsp_fetch_packet,
    2399             :     .read_close     = sdp_read_close,
    2400             :     .priv_class     = &sdp_demuxer_class,
    2401             : };
    2402             : #endif /* CONFIG_SDP_DEMUXER */
    2403             : 
    2404             : #if CONFIG_RTP_DEMUXER
    2405        3209 : static int rtp_probe(AVProbeData *p)
    2406             : {
    2407        3209 :     if (av_strstart(p->filename, "rtp:", NULL))
    2408           0 :         return AVPROBE_SCORE_MAX;
    2409        3209 :     return 0;
    2410             : }
    2411             : 
    2412           0 : static int rtp_read_header(AVFormatContext *s)
    2413             : {
    2414             :     uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
    2415             :     char host[500], sdp[500];
    2416             :     int ret, port;
    2417           0 :     URLContext* in = NULL;
    2418             :     int payload_type;
    2419           0 :     AVCodecParameters *par = NULL;
    2420             :     struct sockaddr_storage addr;
    2421             :     AVIOContext pb;
    2422           0 :     socklen_t addrlen = sizeof(addr);
    2423           0 :     RTSPState *rt = s->priv_data;
    2424             : 
    2425           0 :     if (!ff_network_init())
    2426           0 :         return AVERROR(EIO);
    2427             : 
    2428           0 :     ret = ffurl_open_whitelist(&in, s->filename, AVIO_FLAG_READ,
    2429           0 :                      &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL);
    2430           0 :     if (ret)
    2431           0 :         goto fail;
    2432             : 
    2433             :     while (1) {
    2434           0 :         ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
    2435           0 :         if (ret == AVERROR(EAGAIN))
    2436           0 :             continue;
    2437           0 :         if (ret < 0)
    2438           0 :             goto fail;
    2439           0 :         if (ret < 12) {
    2440           0 :             av_log(s, AV_LOG_WARNING, "Received too short packet\n");
    2441           0 :             continue;
    2442             :         }
    2443             : 
    2444           0 :         if ((recvbuf[0] & 0xc0) != 0x80) {
    2445           0 :             av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
    2446             :                                       "received\n");
    2447           0 :             continue;
    2448             :         }
    2449             : 
    2450           0 :         if (RTP_PT_IS_RTCP(recvbuf[1]))
    2451           0 :             continue;
    2452             : 
    2453           0 :         payload_type = recvbuf[1] & 0x7f;
    2454           0 :         break;
    2455             :     }
    2456           0 :     getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
    2457           0 :     ffurl_close(in);
    2458           0 :     in = NULL;
    2459             : 
    2460           0 :     par = avcodec_parameters_alloc();
    2461           0 :     if (!par) {
    2462           0 :         ret = AVERROR(ENOMEM);
    2463           0 :         goto fail;
    2464             :     }
    2465             : 
    2466           0 :     if (ff_rtp_get_codec_info(par, payload_type)) {
    2467           0 :         av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
    2468             :                                 "without an SDP file describing it\n",
    2469             :                                  payload_type);
    2470           0 :         goto fail;
    2471             :     }
    2472           0 :     if (par->codec_type != AVMEDIA_TYPE_DATA) {
    2473           0 :         av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
    2474             :                                   "properly you need an SDP file "
    2475             :                                   "describing it\n");
    2476             :     }
    2477             : 
    2478           0 :     av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
    2479           0 :                  NULL, 0, s->filename);
    2480             : 
    2481           0 :     snprintf(sdp, sizeof(sdp),
    2482             :              "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
    2483           0 :              addr.ss_family == AF_INET ? 4 : 6, host,
    2484           0 :              par->codec_type == AVMEDIA_TYPE_DATA  ? "application" :
    2485           0 :              par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
    2486             :              port, payload_type);
    2487           0 :     av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
    2488           0 :     avcodec_parameters_free(&par);
    2489             : 
    2490           0 :     ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
    2491           0 :     s->pb = &pb;
    2492             : 
    2493             :     /* sdp_read_header initializes this again */
    2494           0 :     ff_network_close();
    2495             : 
    2496           0 :     rt->media_type_mask = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1;
    2497             : 
    2498           0 :     ret = sdp_read_header(s);
    2499           0 :     s->pb = NULL;
    2500           0 :     return ret;
    2501             : 
    2502           0 : fail:
    2503           0 :     avcodec_parameters_free(&par);
    2504           0 :     if (in)
    2505           0 :         ffurl_close(in);
    2506           0 :     ff_network_close();
    2507           0 :     return ret;
    2508             : }
    2509             : 
    2510             : static const AVClass rtp_demuxer_class = {
    2511             :     .class_name     = "RTP demuxer",
    2512             :     .item_name      = av_default_item_name,
    2513             :     .option         = rtp_options,
    2514             :     .version        = LIBAVUTIL_VERSION_INT,
    2515             : };
    2516             : 
    2517             : AVInputFormat ff_rtp_demuxer = {
    2518             :     .name           = "rtp",
    2519             :     .long_name      = NULL_IF_CONFIG_SMALL("RTP input"),
    2520             :     .priv_data_size = sizeof(RTSPState),
    2521             :     .read_probe     = rtp_probe,
    2522             :     .read_header    = rtp_read_header,
    2523             :     .read_packet    = ff_rtsp_fetch_packet,
    2524             :     .read_close     = sdp_read_close,
    2525             :     .flags          = AVFMT_NOFILE,
    2526             :     .priv_class     = &rtp_demuxer_class,
    2527             : };
    2528             : #endif /* CONFIG_RTP_DEMUXER */

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