LCOV - code coverage report
Current view: top level - libavformat - rtsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 14 1438 1.0 %
Date: 2018-05-20 11:54:08 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             :     { "listen_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             : #if FF_API_OLD_RTSP_OPTIONS
      98             :     { "timeout", "set maximum timeout (in seconds) to wait for incoming connections (-1 is infinite, imply flag listen) (deprecated, use listen_timeout)", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC },
      99             :     { "stimeout", "set timeout (in microseconds) of socket TCP I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC },
     100             : #else
     101             :     { "timeout", "set timeout (in microseconds) of socket TCP I/O operations", OFFSET(stimeout), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC },
     102             : #endif
     103             :     COMMON_OPTS(),
     104             :     { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
     105             : #if FF_API_OLD_RTSP_OPTIONS
     106             :     { "user-agent", "override User-Agent header (deprecated, use user_agent)", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = LIBAVFORMAT_IDENT}, 0, 0, DEC },
     107             : #endif
     108             :     { NULL },
     109             : };
     110             : 
     111             : static const AVOption sdp_options[] = {
     112             :     RTSP_FLAG_OPTS("sdp_flags", "SDP flags"),
     113             :     { "custom_io", "use custom I/O", 0, AV_OPT_TYPE_CONST, {.i64 = RTSP_FLAG_CUSTOM_IO}, 0, 0, DEC, "rtsp_flags" },
     114             :     { "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" },
     115             :     RTSP_MEDIATYPE_OPTS("allowed_media_types", "set media types to accept from the server"),
     116             :     COMMON_OPTS(),
     117             :     { NULL },
     118             : };
     119             : 
     120             : static const AVOption rtp_options[] = {
     121             :     RTSP_FLAG_OPTS("rtp_flags", "set RTP flags"),
     122             :     COMMON_OPTS(),
     123             :     { NULL },
     124             : };
     125             : 
     126             : 
     127           0 : static AVDictionary *map_to_opts(RTSPState *rt)
     128             : {
     129           0 :     AVDictionary *opts = NULL;
     130             :     char buf[256];
     131             : 
     132           0 :     snprintf(buf, sizeof(buf), "%d", rt->buffer_size);
     133           0 :     av_dict_set(&opts, "buffer_size", buf, 0);
     134             : 
     135           0 :     return opts;
     136             : }
     137             : 
     138           0 : static void get_word_until_chars(char *buf, int buf_size,
     139             :                                  const char *sep, const char **pp)
     140             : {
     141             :     const char *p;
     142             :     char *q;
     143             : 
     144           0 :     p = *pp;
     145           0 :     p += strspn(p, SPACE_CHARS);
     146           0 :     q = buf;
     147           0 :     while (!strchr(sep, *p) && *p != '\0') {
     148           0 :         if ((q - buf) < buf_size - 1)
     149           0 :             *q++ = *p;
     150           0 :         p++;
     151             :     }
     152           0 :     if (buf_size > 0)
     153           0 :         *q = '\0';
     154           0 :     *pp = p;
     155           0 : }
     156             : 
     157           0 : static void get_word_sep(char *buf, int buf_size, const char *sep,
     158             :                          const char **pp)
     159             : {
     160           0 :     if (**pp == '/') (*pp)++;
     161           0 :     get_word_until_chars(buf, buf_size, sep, pp);
     162           0 : }
     163             : 
     164           0 : static void get_word(char *buf, int buf_size, const char **pp)
     165             : {
     166           0 :     get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
     167           0 : }
     168             : 
     169             : /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
     170             :  *  and end time.
     171             :  *  Used for seeking in the rtp stream.
     172             :  */
     173           0 : static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
     174             : {
     175             :     char buf[256];
     176             : 
     177           0 :     p += strspn(p, SPACE_CHARS);
     178           0 :     if (!av_stristart(p, "npt=", &p))
     179           0 :         return;
     180             : 
     181           0 :     *start = AV_NOPTS_VALUE;
     182           0 :     *end = AV_NOPTS_VALUE;
     183             : 
     184           0 :     get_word_sep(buf, sizeof(buf), "-", &p);
     185           0 :     if (av_parse_time(start, buf, 1) < 0)
     186           0 :         return;
     187           0 :     if (*p == '-') {
     188           0 :         p++;
     189           0 :         get_word_sep(buf, sizeof(buf), "-", &p);
     190           0 :         if (av_parse_time(end, buf, 1) < 0)
     191           0 :             av_log(NULL, AV_LOG_DEBUG, "Failed to parse interval end specification '%s'\n", buf);
     192             :     }
     193             : }
     194             : 
     195           0 : static int get_sockaddr(AVFormatContext *s,
     196             :                         const char *buf, struct sockaddr_storage *sock)
     197             : {
     198           0 :     struct addrinfo hints = { 0 }, *ai = NULL;
     199             :     int ret;
     200             : 
     201           0 :     hints.ai_flags = AI_NUMERICHOST;
     202           0 :     if ((ret = getaddrinfo(buf, NULL, &hints, &ai))) {
     203           0 :         av_log(s, AV_LOG_ERROR, "getaddrinfo(%s): %s\n",
     204             :                buf,
     205             :                gai_strerror(ret));
     206           0 :         return -1;
     207             :     }
     208           0 :     memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
     209           0 :     freeaddrinfo(ai);
     210           0 :     return 0;
     211             : }
     212             : 
     213             : #if CONFIG_RTPDEC
     214           0 : static void init_rtp_handler(const RTPDynamicProtocolHandler *handler,
     215             :                              RTSPStream *rtsp_st, AVStream *st)
     216             : {
     217           0 :     AVCodecParameters *par = st ? st->codecpar : NULL;
     218           0 :     if (!handler)
     219           0 :         return;
     220           0 :     if (par)
     221           0 :         par->codec_id          = handler->codec_id;
     222           0 :     rtsp_st->dynamic_handler = handler;
     223           0 :     if (st)
     224           0 :         st->need_parsing = handler->need_parsing;
     225           0 :     if (handler->priv_data_size) {
     226           0 :         rtsp_st->dynamic_protocol_context = av_mallocz(handler->priv_data_size);
     227           0 :         if (!rtsp_st->dynamic_protocol_context)
     228           0 :             rtsp_st->dynamic_handler = NULL;
     229             :     }
     230             : }
     231             : 
     232           0 : static void finalize_rtp_handler_init(AVFormatContext *s, RTSPStream *rtsp_st,
     233             :                                       AVStream *st)
     234             : {
     235           0 :     if (rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->init) {
     236           0 :         int ret = rtsp_st->dynamic_handler->init(s, st ? st->index : -1,
     237             :                                                  rtsp_st->dynamic_protocol_context);
     238           0 :         if (ret < 0) {
     239           0 :             if (rtsp_st->dynamic_protocol_context) {
     240           0 :                 if (rtsp_st->dynamic_handler->close)
     241           0 :                     rtsp_st->dynamic_handler->close(
     242             :                         rtsp_st->dynamic_protocol_context);
     243           0 :                 av_free(rtsp_st->dynamic_protocol_context);
     244             :             }
     245           0 :             rtsp_st->dynamic_protocol_context = NULL;
     246           0 :             rtsp_st->dynamic_handler = NULL;
     247             :         }
     248             :     }
     249           0 : }
     250             : 
     251             : /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
     252           0 : static int sdp_parse_rtpmap(AVFormatContext *s,
     253             :                             AVStream *st, RTSPStream *rtsp_st,
     254             :                             int payload_type, const char *p)
     255             : {
     256           0 :     AVCodecParameters *par = st->codecpar;
     257             :     char buf[256];
     258             :     int i;
     259             :     const AVCodecDescriptor *desc;
     260             :     const char *c_name;
     261             : 
     262             :     /* See if we can handle this kind of payload.
     263             :      * The space should normally not be there but some Real streams or
     264             :      * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
     265             :      * have a trailing space. */
     266           0 :     get_word_sep(buf, sizeof(buf), "/ ", &p);
     267           0 :     if (payload_type < RTP_PT_PRIVATE) {
     268             :         /* We are in a standard case
     269             :          * (from http://www.iana.org/assignments/rtp-parameters). */
     270           0 :         par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
     271             :     }
     272             : 
     273           0 :     if (par->codec_id == AV_CODEC_ID_NONE) {
     274           0 :         const RTPDynamicProtocolHandler *handler =
     275           0 :             ff_rtp_handler_find_by_name(buf, par->codec_type);
     276           0 :         init_rtp_handler(handler, rtsp_st, st);
     277             :         /* If no dynamic handler was found, check with the list of standard
     278             :          * allocated types, if such a stream for some reason happens to
     279             :          * use a private payload type. This isn't handled in rtpdec.c, since
     280             :          * the format name from the rtpmap line never is passed into rtpdec. */
     281           0 :         if (!rtsp_st->dynamic_handler)
     282           0 :             par->codec_id = ff_rtp_codec_id(buf, par->codec_type);
     283             :     }
     284             : 
     285           0 :     desc = avcodec_descriptor_get(par->codec_id);
     286           0 :     if (desc && desc->name)
     287           0 :         c_name = desc->name;
     288             :     else
     289           0 :         c_name = "(null)";
     290             : 
     291           0 :     get_word_sep(buf, sizeof(buf), "/", &p);
     292           0 :     i = atoi(buf);
     293           0 :     switch (par->codec_type) {
     294           0 :     case AVMEDIA_TYPE_AUDIO:
     295           0 :         av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
     296           0 :         par->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
     297           0 :         par->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
     298           0 :         if (i > 0) {
     299           0 :             par->sample_rate = i;
     300           0 :             avpriv_set_pts_info(st, 32, 1, par->sample_rate);
     301           0 :             get_word_sep(buf, sizeof(buf), "/", &p);
     302           0 :             i = atoi(buf);
     303           0 :             if (i > 0)
     304           0 :                 par->channels = i;
     305             :         }
     306           0 :         av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
     307             :                par->sample_rate);
     308           0 :         av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
     309             :                par->channels);
     310           0 :         break;
     311           0 :     case AVMEDIA_TYPE_VIDEO:
     312           0 :         av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
     313           0 :         if (i > 0)
     314           0 :             avpriv_set_pts_info(st, 32, 1, i);
     315           0 :         break;
     316           0 :     default:
     317           0 :         break;
     318             :     }
     319           0 :     finalize_rtp_handler_init(s, rtsp_st, st);
     320           0 :     return 0;
     321             : }
     322             : 
     323             : /* parse the attribute line from the fmtp a line of an sdp response. This
     324             :  * is broken out as a function because it is used in rtp_h264.c, which is
     325             :  * forthcoming. */
     326           0 : int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
     327             :                                 char *value, int value_size)
     328             : {
     329           0 :     *p += strspn(*p, SPACE_CHARS);
     330           0 :     if (**p) {
     331           0 :         get_word_sep(attr, attr_size, "=", p);
     332           0 :         if (**p == '=')
     333           0 :             (*p)++;
     334           0 :         get_word_sep(value, value_size, ";", p);
     335           0 :         if (**p == ';')
     336           0 :             (*p)++;
     337           0 :         return 1;
     338             :     }
     339           0 :     return 0;
     340             : }
     341             : 
     342             : typedef struct SDPParseState {
     343             :     /* SDP only */
     344             :     struct sockaddr_storage default_ip;
     345             :     int            default_ttl;
     346             :     int            skip_media;  ///< set if an unknown m= line occurs
     347             :     int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
     348             :     struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
     349             :     int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
     350             :     struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
     351             :     int seen_rtpmap;
     352             :     int seen_fmtp;
     353             :     char delayed_fmtp[2048];
     354             : } SDPParseState;
     355             : 
     356           0 : static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
     357             :                                       struct RTSPSource ***dest, int *dest_count)
     358             : {
     359             :     RTSPSource *rtsp_src, *rtsp_src2;
     360             :     int i;
     361           0 :     for (i = 0; i < count; i++) {
     362           0 :         rtsp_src = addrs[i];
     363           0 :         rtsp_src2 = av_malloc(sizeof(*rtsp_src2));
     364           0 :         if (!rtsp_src2)
     365           0 :             continue;
     366           0 :         memcpy(rtsp_src2, rtsp_src, sizeof(*rtsp_src));
     367           0 :         dynarray_add(dest, dest_count, rtsp_src2);
     368             :     }
     369           0 : }
     370             : 
     371           0 : static void parse_fmtp(AVFormatContext *s, RTSPState *rt,
     372             :                        int payload_type, const char *line)
     373             : {
     374             :     int i;
     375             : 
     376           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
     377           0 :         RTSPStream *rtsp_st = rt->rtsp_streams[i];
     378           0 :         if (rtsp_st->sdp_payload_type == payload_type &&
     379           0 :             rtsp_st->dynamic_handler &&
     380           0 :             rtsp_st->dynamic_handler->parse_sdp_a_line) {
     381           0 :             rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
     382             :                 rtsp_st->dynamic_protocol_context, line);
     383             :         }
     384             :     }
     385           0 : }
     386             : 
     387           0 : static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
     388             :                            int letter, const char *buf)
     389             : {
     390           0 :     RTSPState *rt = s->priv_data;
     391             :     char buf1[64], st_type[64];
     392             :     const char *p;
     393             :     enum AVMediaType codec_type;
     394             :     int payload_type;
     395             :     AVStream *st;
     396             :     RTSPStream *rtsp_st;
     397             :     RTSPSource *rtsp_src;
     398             :     struct sockaddr_storage sdp_ip;
     399             :     int ttl;
     400             : 
     401           0 :     av_log(s, AV_LOG_TRACE, "sdp: %c='%s'\n", letter, buf);
     402             : 
     403           0 :     p = buf;
     404           0 :     if (s1->skip_media && letter != 'm')
     405           0 :         return;
     406           0 :     switch (letter) {
     407           0 :     case 'c':
     408           0 :         get_word(buf1, sizeof(buf1), &p);
     409           0 :         if (strcmp(buf1, "IN") != 0)
     410           0 :             return;
     411           0 :         get_word(buf1, sizeof(buf1), &p);
     412           0 :         if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
     413           0 :             return;
     414           0 :         get_word_sep(buf1, sizeof(buf1), "/", &p);
     415           0 :         if (get_sockaddr(s, buf1, &sdp_ip))
     416           0 :             return;
     417           0 :         ttl = 16;
     418           0 :         if (*p == '/') {
     419           0 :             p++;
     420           0 :             get_word_sep(buf1, sizeof(buf1), "/", &p);
     421           0 :             ttl = atoi(buf1);
     422             :         }
     423           0 :         if (s->nb_streams == 0) {
     424           0 :             s1->default_ip = sdp_ip;
     425           0 :             s1->default_ttl = ttl;
     426             :         } else {
     427           0 :             rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     428           0 :             rtsp_st->sdp_ip = sdp_ip;
     429           0 :             rtsp_st->sdp_ttl = ttl;
     430             :         }
     431           0 :         break;
     432           0 :     case 's':
     433           0 :         av_dict_set(&s->metadata, "title", p, 0);
     434           0 :         break;
     435           0 :     case 'i':
     436           0 :         if (s->nb_streams == 0) {
     437           0 :             av_dict_set(&s->metadata, "comment", p, 0);
     438           0 :             break;
     439             :         }
     440           0 :         break;
     441           0 :     case 'm':
     442             :         /* new stream */
     443           0 :         s1->skip_media  = 0;
     444           0 :         s1->seen_fmtp   = 0;
     445           0 :         s1->seen_rtpmap = 0;
     446           0 :         codec_type = AVMEDIA_TYPE_UNKNOWN;
     447           0 :         get_word(st_type, sizeof(st_type), &p);
     448           0 :         if (!strcmp(st_type, "audio")) {
     449           0 :             codec_type = AVMEDIA_TYPE_AUDIO;
     450           0 :         } else if (!strcmp(st_type, "video")) {
     451           0 :             codec_type = AVMEDIA_TYPE_VIDEO;
     452           0 :         } else if (!strcmp(st_type, "application")) {
     453           0 :             codec_type = AVMEDIA_TYPE_DATA;
     454           0 :         } else if (!strcmp(st_type, "text")) {
     455           0 :             codec_type = AVMEDIA_TYPE_SUBTITLE;
     456             :         }
     457           0 :         if (codec_type == AVMEDIA_TYPE_UNKNOWN || !(rt->media_type_mask & (1 << codec_type))) {
     458           0 :             s1->skip_media = 1;
     459           0 :             return;
     460             :         }
     461           0 :         rtsp_st = av_mallocz(sizeof(RTSPStream));
     462           0 :         if (!rtsp_st)
     463           0 :             return;
     464           0 :         rtsp_st->stream_index = -1;
     465           0 :         dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
     466             : 
     467           0 :         rtsp_st->sdp_ip = s1->default_ip;
     468           0 :         rtsp_st->sdp_ttl = s1->default_ttl;
     469             : 
     470           0 :         copy_default_source_addrs(s1->default_include_source_addrs,
     471             :                                   s1->nb_default_include_source_addrs,
     472             :                                   &rtsp_st->include_source_addrs,
     473             :                                   &rtsp_st->nb_include_source_addrs);
     474           0 :         copy_default_source_addrs(s1->default_exclude_source_addrs,
     475             :                                   s1->nb_default_exclude_source_addrs,
     476             :                                   &rtsp_st->exclude_source_addrs,
     477             :                                   &rtsp_st->nb_exclude_source_addrs);
     478             : 
     479           0 :         get_word(buf1, sizeof(buf1), &p); /* port */
     480           0 :         rtsp_st->sdp_port = atoi(buf1);
     481             : 
     482           0 :         get_word(buf1, sizeof(buf1), &p); /* protocol */
     483           0 :         if (!strcmp(buf1, "udp"))
     484           0 :             rt->transport = RTSP_TRANSPORT_RAW;
     485           0 :         else if (strstr(buf1, "/AVPF") || strstr(buf1, "/SAVPF"))
     486           0 :             rtsp_st->feedback = 1;
     487             : 
     488             :         /* XXX: handle list of formats */
     489           0 :         get_word(buf1, sizeof(buf1), &p); /* format list */
     490           0 :         rtsp_st->sdp_payload_type = atoi(buf1);
     491             : 
     492           0 :         if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
     493             :             /* no corresponding stream */
     494           0 :             if (rt->transport == RTSP_TRANSPORT_RAW) {
     495           0 :                 if (CONFIG_RTPDEC && !rt->ts)
     496           0 :                     rt->ts = avpriv_mpegts_parse_open(s);
     497             :             } else {
     498             :                 const RTPDynamicProtocolHandler *handler;
     499           0 :                 handler = ff_rtp_handler_find_by_id(
     500             :                               rtsp_st->sdp_payload_type, AVMEDIA_TYPE_DATA);
     501           0 :                 init_rtp_handler(handler, rtsp_st, NULL);
     502           0 :                 finalize_rtp_handler_init(s, rtsp_st, NULL);
     503             :             }
     504           0 :         } else if (rt->server_type == RTSP_SERVER_WMS &&
     505             :                    codec_type == AVMEDIA_TYPE_DATA) {
     506             :             /* RTX stream, a stream that carries all the other actual
     507             :              * audio/video streams. Don't expose this to the callers. */
     508             :         } else {
     509           0 :             st = avformat_new_stream(s, NULL);
     510           0 :             if (!st)
     511           0 :                 return;
     512           0 :             st->id = rt->nb_rtsp_streams - 1;
     513           0 :             rtsp_st->stream_index = st->index;
     514           0 :             st->codecpar->codec_type = codec_type;
     515           0 :             if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
     516             :                 const RTPDynamicProtocolHandler *handler;
     517             :                 /* if standard payload type, we can find the codec right now */
     518           0 :                 ff_rtp_get_codec_info(st->codecpar, rtsp_st->sdp_payload_type);
     519           0 :                 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
     520           0 :                     st->codecpar->sample_rate > 0)
     521           0 :                     avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
     522             :                 /* Even static payload types may need a custom depacketizer */
     523           0 :                 handler = ff_rtp_handler_find_by_id(
     524           0 :                               rtsp_st->sdp_payload_type, st->codecpar->codec_type);
     525           0 :                 init_rtp_handler(handler, rtsp_st, st);
     526           0 :                 finalize_rtp_handler_init(s, rtsp_st, st);
     527             :             }
     528           0 :             if (rt->default_lang[0])
     529           0 :                 av_dict_set(&st->metadata, "language", rt->default_lang, 0);
     530             :         }
     531             :         /* put a default control url */
     532           0 :         av_strlcpy(rtsp_st->control_url, rt->control_uri,
     533             :                    sizeof(rtsp_st->control_url));
     534           0 :         break;
     535           0 :     case 'a':
     536           0 :         if (av_strstart(p, "control:", &p)) {
     537           0 :             if (s->nb_streams == 0) {
     538           0 :                 if (!strncmp(p, "rtsp://", 7))
     539           0 :                     av_strlcpy(rt->control_uri, p,
     540             :                                sizeof(rt->control_uri));
     541             :             } else {
     542             :                 char proto[32];
     543             :                 /* get the control url */
     544           0 :                 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     545             : 
     546             :                 /* XXX: may need to add full url resolution */
     547           0 :                 av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
     548             :                              NULL, NULL, 0, p);
     549           0 :                 if (proto[0] == '\0') {
     550             :                     /* relative control URL */
     551           0 :                     if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
     552           0 :                     av_strlcat(rtsp_st->control_url, "/",
     553             :                                sizeof(rtsp_st->control_url));
     554           0 :                     av_strlcat(rtsp_st->control_url, p,
     555             :                                sizeof(rtsp_st->control_url));
     556             :                 } else
     557           0 :                     av_strlcpy(rtsp_st->control_url, p,
     558             :                                sizeof(rtsp_st->control_url));
     559             :             }
     560           0 :         } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
     561             :             /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
     562           0 :             get_word(buf1, sizeof(buf1), &p);
     563           0 :             payload_type = atoi(buf1);
     564           0 :             rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     565           0 :             if (rtsp_st->stream_index >= 0) {
     566           0 :                 st = s->streams[rtsp_st->stream_index];
     567           0 :                 sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
     568             :             }
     569           0 :             s1->seen_rtpmap = 1;
     570           0 :             if (s1->seen_fmtp) {
     571           0 :                 parse_fmtp(s, rt, payload_type, s1->delayed_fmtp);
     572             :             }
     573           0 :         } else if (av_strstart(p, "fmtp:", &p) ||
     574           0 :                    av_strstart(p, "framesize:", &p)) {
     575             :             // let dynamic protocol handlers have a stab at the line.
     576           0 :             get_word(buf1, sizeof(buf1), &p);
     577           0 :             payload_type = atoi(buf1);
     578           0 :             if (s1->seen_rtpmap) {
     579           0 :                 parse_fmtp(s, rt, payload_type, buf);
     580             :             } else {
     581           0 :                 s1->seen_fmtp = 1;
     582           0 :                 av_strlcpy(s1->delayed_fmtp, buf, sizeof(s1->delayed_fmtp));
     583             :             }
     584           0 :         } else if (av_strstart(p, "ssrc:", &p) && s->nb_streams > 0) {
     585           0 :             rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     586           0 :             get_word(buf1, sizeof(buf1), &p);
     587           0 :             rtsp_st->ssrc = strtoll(buf1, NULL, 10);
     588           0 :         } else if (av_strstart(p, "range:", &p)) {
     589             :             int64_t start, end;
     590             : 
     591             :             // this is so that seeking on a streamed file can work.
     592           0 :             rtsp_parse_range_npt(p, &start, &end);
     593           0 :             s->start_time = start;
     594             :             /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
     595           0 :             s->duration   = (end == AV_NOPTS_VALUE) ?
     596           0 :                             AV_NOPTS_VALUE : end - start;
     597           0 :         } else if (av_strstart(p, "lang:", &p)) {
     598           0 :             if (s->nb_streams > 0) {
     599           0 :                 get_word(buf1, sizeof(buf1), &p);
     600           0 :                 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     601           0 :                 if (rtsp_st->stream_index >= 0) {
     602           0 :                     st = s->streams[rtsp_st->stream_index];
     603           0 :                     av_dict_set(&st->metadata, "language", buf1, 0);
     604             :                 }
     605             :             } else
     606           0 :                 get_word(rt->default_lang, sizeof(rt->default_lang), &p);
     607           0 :         } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
     608           0 :             if (atoi(p) == 1)
     609           0 :                 rt->transport = RTSP_TRANSPORT_RDT;
     610           0 :         } else if (av_strstart(p, "SampleRate:integer;", &p) &&
     611           0 :                    s->nb_streams > 0) {
     612           0 :             st = s->streams[s->nb_streams - 1];
     613           0 :             st->codecpar->sample_rate = atoi(p);
     614           0 :         } else if (av_strstart(p, "crypto:", &p) && s->nb_streams > 0) {
     615             :             // RFC 4568
     616           0 :             rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     617           0 :             get_word(buf1, sizeof(buf1), &p); // ignore tag
     618           0 :             get_word(rtsp_st->crypto_suite, sizeof(rtsp_st->crypto_suite), &p);
     619           0 :             p += strspn(p, SPACE_CHARS);
     620           0 :             if (av_strstart(p, "inline:", &p))
     621           0 :                 get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
     622           0 :         } else if (av_strstart(p, "source-filter:", &p)) {
     623           0 :             int exclude = 0;
     624           0 :             get_word(buf1, sizeof(buf1), &p);
     625           0 :             if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
     626           0 :                 return;
     627           0 :             exclude = !strcmp(buf1, "excl");
     628             : 
     629           0 :             get_word(buf1, sizeof(buf1), &p);
     630           0 :             if (strcmp(buf1, "IN") != 0)
     631           0 :                 return;
     632           0 :             get_word(buf1, sizeof(buf1), &p);
     633           0 :             if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
     634           0 :                 return;
     635             :             // not checking that the destination address actually matches or is wildcard
     636           0 :             get_word(buf1, sizeof(buf1), &p);
     637             : 
     638           0 :             while (*p != '\0') {
     639           0 :                 rtsp_src = av_mallocz(sizeof(*rtsp_src));
     640           0 :                 if (!rtsp_src)
     641           0 :                     return;
     642           0 :                 get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
     643           0 :                 if (exclude) {
     644           0 :                     if (s->nb_streams == 0) {
     645           0 :                         dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
     646             :                     } else {
     647           0 :                         rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     648           0 :                         dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
     649             :                     }
     650             :                 } else {
     651           0 :                     if (s->nb_streams == 0) {
     652           0 :                         dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
     653             :                     } else {
     654           0 :                         rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     655           0 :                         dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
     656             :                     }
     657             :                 }
     658             :             }
     659             :         } else {
     660           0 :             if (rt->server_type == RTSP_SERVER_WMS)
     661           0 :                 ff_wms_parse_sdp_a_line(s, p);
     662           0 :             if (s->nb_streams > 0) {
     663           0 :                 rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
     664             : 
     665           0 :                 if (rt->server_type == RTSP_SERVER_REAL)
     666           0 :                     ff_real_parse_sdp_a_line(s, rtsp_st->stream_index, p);
     667             : 
     668           0 :                 if (rtsp_st->dynamic_handler &&
     669           0 :                     rtsp_st->dynamic_handler->parse_sdp_a_line)
     670           0 :                     rtsp_st->dynamic_handler->parse_sdp_a_line(s,
     671             :                         rtsp_st->stream_index,
     672             :                         rtsp_st->dynamic_protocol_context, buf);
     673             :             }
     674             :         }
     675           0 :         break;
     676             :     }
     677             : }
     678             : 
     679           0 : int ff_sdp_parse(AVFormatContext *s, const char *content)
     680             : {
     681             :     const char *p;
     682             :     int letter, i;
     683             :     /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
     684             :      * contain long SDP lines containing complete ASF Headers (several
     685             :      * kB) or arrays of MDPR (RM stream descriptor) headers plus
     686             :      * "rulebooks" describing their properties. Therefore, the SDP line
     687             :      * buffer is large.
     688             :      *
     689             :      * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
     690             :      * in rtpdec_xiph.c. */
     691             :     char buf[16384], *q;
     692           0 :     SDPParseState sdp_parse_state = { { 0 } }, *s1 = &sdp_parse_state;
     693             : 
     694           0 :     p = content;
     695             :     for (;;) {
     696           0 :         p += strspn(p, SPACE_CHARS);
     697           0 :         letter = *p;
     698           0 :         if (letter == '\0')
     699           0 :             break;
     700           0 :         p++;
     701           0 :         if (*p != '=')
     702           0 :             goto next_line;
     703           0 :         p++;
     704             :         /* get the content */
     705           0 :         q = buf;
     706           0 :         while (*p != '\n' && *p != '\r' && *p != '\0') {
     707           0 :             if ((q - buf) < sizeof(buf) - 1)
     708           0 :                 *q++ = *p;
     709           0 :             p++;
     710             :         }
     711           0 :         *q = '\0';
     712           0 :         sdp_parse_line(s, s1, letter, buf);
     713           0 :     next_line:
     714           0 :         while (*p != '\n' && *p != '\0')
     715           0 :             p++;
     716           0 :         if (*p == '\n')
     717           0 :             p++;
     718             :     }
     719             : 
     720           0 :     for (i = 0; i < s1->nb_default_include_source_addrs; i++)
     721           0 :         av_freep(&s1->default_include_source_addrs[i]);
     722           0 :     av_freep(&s1->default_include_source_addrs);
     723           0 :     for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
     724           0 :         av_freep(&s1->default_exclude_source_addrs[i]);
     725           0 :     av_freep(&s1->default_exclude_source_addrs);
     726             : 
     727           0 :     return 0;
     728             : }
     729             : #endif /* CONFIG_RTPDEC */
     730             : 
     731           0 : void ff_rtsp_undo_setup(AVFormatContext *s, int send_packets)
     732             : {
     733           0 :     RTSPState *rt = s->priv_data;
     734             :     int i;
     735             : 
     736           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
     737           0 :         RTSPStream *rtsp_st = rt->rtsp_streams[i];
     738           0 :         if (!rtsp_st)
     739           0 :             continue;
     740           0 :         if (rtsp_st->transport_priv) {
     741           0 :             if (s->oformat) {
     742           0 :                 AVFormatContext *rtpctx = rtsp_st->transport_priv;
     743           0 :                 av_write_trailer(rtpctx);
     744           0 :                 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
     745           0 :                     if (CONFIG_RTSP_MUXER && rtpctx->pb && send_packets)
     746           0 :                         ff_rtsp_tcp_write_packet(s, rtsp_st);
     747           0 :                     ffio_free_dyn_buf(&rtpctx->pb);
     748             :                 } else {
     749           0 :                     avio_closep(&rtpctx->pb);
     750             :                 }
     751           0 :                 avformat_free_context(rtpctx);
     752           0 :             } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT)
     753           0 :                 ff_rdt_parse_close(rtsp_st->transport_priv);
     754           0 :             else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP)
     755           0 :                 ff_rtp_parse_close(rtsp_st->transport_priv);
     756             :         }
     757           0 :         rtsp_st->transport_priv = NULL;
     758           0 :         if (rtsp_st->rtp_handle)
     759           0 :             ffurl_close(rtsp_st->rtp_handle);
     760           0 :         rtsp_st->rtp_handle = NULL;
     761             :     }
     762           0 : }
     763             : 
     764             : /* close and free RTSP streams */
     765           0 : void ff_rtsp_close_streams(AVFormatContext *s)
     766             : {
     767           0 :     RTSPState *rt = s->priv_data;
     768             :     int i, j;
     769             :     RTSPStream *rtsp_st;
     770             : 
     771           0 :     ff_rtsp_undo_setup(s, 0);
     772           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
     773           0 :         rtsp_st = rt->rtsp_streams[i];
     774           0 :         if (rtsp_st) {
     775           0 :             if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) {
     776           0 :                 if (rtsp_st->dynamic_handler->close)
     777           0 :                     rtsp_st->dynamic_handler->close(
     778           0 :                         rtsp_st->dynamic_protocol_context);
     779           0 :                 av_free(rtsp_st->dynamic_protocol_context);
     780             :             }
     781           0 :             for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
     782           0 :                 av_freep(&rtsp_st->include_source_addrs[j]);
     783           0 :             av_freep(&rtsp_st->include_source_addrs);
     784           0 :             for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
     785           0 :                 av_freep(&rtsp_st->exclude_source_addrs[j]);
     786           0 :             av_freep(&rtsp_st->exclude_source_addrs);
     787             : 
     788           0 :             av_freep(&rtsp_st);
     789             :         }
     790             :     }
     791           0 :     av_freep(&rt->rtsp_streams);
     792           0 :     if (rt->asf_ctx) {
     793           0 :         avformat_close_input(&rt->asf_ctx);
     794             :     }
     795           0 :     if (CONFIG_RTPDEC && rt->ts)
     796           0 :         avpriv_mpegts_parse_close(rt->ts);
     797           0 :     av_freep(&rt->p);
     798           0 :     av_freep(&rt->recvbuf);
     799           0 : }
     800             : 
     801           0 : int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
     802             : {
     803           0 :     RTSPState *rt = s->priv_data;
     804           0 :     AVStream *st = NULL;
     805           0 :     int reordering_queue_size = rt->reordering_queue_size;
     806           0 :     if (reordering_queue_size < 0) {
     807           0 :         if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
     808           0 :             reordering_queue_size = 0;
     809             :         else
     810           0 :             reordering_queue_size = RTP_REORDER_QUEUE_DEFAULT_SIZE;
     811             :     }
     812             : 
     813             :     /* open the RTP context */
     814           0 :     if (rtsp_st->stream_index >= 0)
     815           0 :         st = s->streams[rtsp_st->stream_index];
     816           0 :     if (!st)
     817           0 :         s->ctx_flags |= AVFMTCTX_NOHEADER;
     818             : 
     819           0 :     if (CONFIG_RTSP_MUXER && s->oformat && st) {
     820           0 :         int ret = ff_rtp_chain_mux_open((AVFormatContext **)&rtsp_st->transport_priv,
     821             :                                         s, st, rtsp_st->rtp_handle,
     822             :                                         RTSP_TCP_MAX_PACKET_SIZE,
     823             :                                         rtsp_st->stream_index);
     824             :         /* Ownership of rtp_handle is passed to the rtp mux context */
     825           0 :         rtsp_st->rtp_handle = NULL;
     826           0 :         if (ret < 0)
     827           0 :             return ret;
     828           0 :         st->time_base = ((AVFormatContext*)rtsp_st->transport_priv)->streams[0]->time_base;
     829           0 :     } else if (rt->transport == RTSP_TRANSPORT_RAW) {
     830           0 :         return 0; // Don't need to open any parser here
     831           0 :     } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT && st)
     832           0 :         rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
     833           0 :                                             rtsp_st->dynamic_protocol_context,
     834             :                                             rtsp_st->dynamic_handler);
     835             :     else if (CONFIG_RTPDEC)
     836           0 :         rtsp_st->transport_priv = ff_rtp_parse_open(s, st,
     837             :                                          rtsp_st->sdp_payload_type,
     838             :                                          reordering_queue_size);
     839             : 
     840           0 :     if (!rtsp_st->transport_priv) {
     841           0 :          return AVERROR(ENOMEM);
     842           0 :     } else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP &&
     843           0 :                s->iformat) {
     844           0 :         RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
     845           0 :         rtpctx->ssrc = rtsp_st->ssrc;
     846           0 :         if (rtsp_st->dynamic_handler) {
     847           0 :             ff_rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
     848             :                                               rtsp_st->dynamic_protocol_context,
     849             :                                               rtsp_st->dynamic_handler);
     850             :         }
     851           0 :         if (rtsp_st->crypto_suite[0])
     852           0 :             ff_rtp_parse_set_crypto(rtsp_st->transport_priv,
     853           0 :                                     rtsp_st->crypto_suite,
     854           0 :                                     rtsp_st->crypto_params);
     855             :     }
     856             : 
     857           0 :     return 0;
     858             : }
     859             : 
     860             : #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
     861           0 : static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
     862             : {
     863             :     const char *q;
     864             :     char *p;
     865             :     int v;
     866             : 
     867           0 :     q = *pp;
     868           0 :     q += strspn(q, SPACE_CHARS);
     869           0 :     v = strtol(q, &p, 10);
     870           0 :     if (*p == '-') {
     871           0 :         p++;
     872           0 :         *min_ptr = v;
     873           0 :         v = strtol(p, &p, 10);
     874           0 :         *max_ptr = v;
     875             :     } else {
     876           0 :         *min_ptr = v;
     877           0 :         *max_ptr = v;
     878             :     }
     879           0 :     *pp = p;
     880           0 : }
     881             : 
     882             : /* XXX: only one transport specification is parsed */
     883           0 : static void rtsp_parse_transport(AVFormatContext *s,
     884             :                                  RTSPMessageHeader *reply, const char *p)
     885             : {
     886             :     char transport_protocol[16];
     887             :     char profile[16];
     888             :     char lower_transport[16];
     889             :     char parameter[16];
     890             :     RTSPTransportField *th;
     891             :     char buf[256];
     892             : 
     893           0 :     reply->nb_transports = 0;
     894             : 
     895             :     for (;;) {
     896           0 :         p += strspn(p, SPACE_CHARS);
     897           0 :         if (*p == '\0')
     898           0 :             break;
     899             : 
     900           0 :         th = &reply->transports[reply->nb_transports];
     901             : 
     902           0 :         get_word_sep(transport_protocol, sizeof(transport_protocol),
     903             :                      "/", &p);
     904           0 :         if (!av_strcasecmp (transport_protocol, "rtp")) {
     905           0 :             get_word_sep(profile, sizeof(profile), "/;,", &p);
     906           0 :             lower_transport[0] = '\0';
     907             :             /* rtp/avp/<protocol> */
     908           0 :             if (*p == '/') {
     909           0 :                 get_word_sep(lower_transport, sizeof(lower_transport),
     910             :                              ";,", &p);
     911             :             }
     912           0 :             th->transport = RTSP_TRANSPORT_RTP;
     913           0 :         } else if (!av_strcasecmp (transport_protocol, "x-pn-tng") ||
     914           0 :                    !av_strcasecmp (transport_protocol, "x-real-rdt")) {
     915             :             /* x-pn-tng/<protocol> */
     916           0 :             get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
     917           0 :             profile[0] = '\0';
     918           0 :             th->transport = RTSP_TRANSPORT_RDT;
     919           0 :         } else if (!av_strcasecmp(transport_protocol, "raw")) {
     920           0 :             get_word_sep(profile, sizeof(profile), "/;,", &p);
     921           0 :             lower_transport[0] = '\0';
     922             :             /* raw/raw/<protocol> */
     923           0 :             if (*p == '/') {
     924           0 :                 get_word_sep(lower_transport, sizeof(lower_transport),
     925             :                              ";,", &p);
     926             :             }
     927           0 :             th->transport = RTSP_TRANSPORT_RAW;
     928             :         }
     929           0 :         if (!av_strcasecmp(lower_transport, "TCP"))
     930           0 :             th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
     931             :         else
     932           0 :             th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
     933             : 
     934           0 :         if (*p == ';')
     935           0 :             p++;
     936             :         /* get each parameter */
     937           0 :         while (*p != '\0' && *p != ',') {
     938           0 :             get_word_sep(parameter, sizeof(parameter), "=;,", &p);
     939           0 :             if (!strcmp(parameter, "port")) {
     940           0 :                 if (*p == '=') {
     941           0 :                     p++;
     942           0 :                     rtsp_parse_range(&th->port_min, &th->port_max, &p);
     943             :                 }
     944           0 :             } else if (!strcmp(parameter, "client_port")) {
     945           0 :                 if (*p == '=') {
     946           0 :                     p++;
     947           0 :                     rtsp_parse_range(&th->client_port_min,
     948             :                                      &th->client_port_max, &p);
     949             :                 }
     950           0 :             } else if (!strcmp(parameter, "server_port")) {
     951           0 :                 if (*p == '=') {
     952           0 :                     p++;
     953           0 :                     rtsp_parse_range(&th->server_port_min,
     954             :                                      &th->server_port_max, &p);
     955             :                 }
     956           0 :             } else if (!strcmp(parameter, "interleaved")) {
     957           0 :                 if (*p == '=') {
     958           0 :                     p++;
     959           0 :                     rtsp_parse_range(&th->interleaved_min,
     960             :                                      &th->interleaved_max, &p);
     961             :                 }
     962           0 :             } else if (!strcmp(parameter, "multicast")) {
     963           0 :                 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
     964           0 :                     th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
     965           0 :             } else if (!strcmp(parameter, "ttl")) {
     966           0 :                 if (*p == '=') {
     967             :                     char *end;
     968           0 :                     p++;
     969           0 :                     th->ttl = strtol(p, &end, 10);
     970           0 :                     p = end;
     971             :                 }
     972           0 :             } else if (!strcmp(parameter, "destination")) {
     973           0 :                 if (*p == '=') {
     974           0 :                     p++;
     975           0 :                     get_word_sep(buf, sizeof(buf), ";,", &p);
     976           0 :                     get_sockaddr(s, buf, &th->destination);
     977             :                 }
     978           0 :             } else if (!strcmp(parameter, "source")) {
     979           0 :                 if (*p == '=') {
     980           0 :                     p++;
     981           0 :                     get_word_sep(buf, sizeof(buf), ";,", &p);
     982           0 :                     av_strlcpy(th->source, buf, sizeof(th->source));
     983             :                 }
     984           0 :             } else if (!strcmp(parameter, "mode")) {
     985           0 :                 if (*p == '=') {
     986           0 :                     p++;
     987           0 :                     get_word_sep(buf, sizeof(buf), ";, ", &p);
     988           0 :                     if (!strcmp(buf, "record") ||
     989           0 :                         !strcmp(buf, "receive"))
     990           0 :                         th->mode_record = 1;
     991             :                 }
     992             :             }
     993             : 
     994           0 :             while (*p != ';' && *p != '\0' && *p != ',')
     995           0 :                 p++;
     996           0 :             if (*p == ';')
     997           0 :                 p++;
     998             :         }
     999           0 :         if (*p == ',')
    1000           0 :             p++;
    1001             : 
    1002           0 :         reply->nb_transports++;
    1003           0 :         if (reply->nb_transports >= RTSP_MAX_TRANSPORTS)
    1004           0 :             break;
    1005             :     }
    1006           0 : }
    1007             : 
    1008           0 : static void handle_rtp_info(RTSPState *rt, const char *url,
    1009             :                             uint32_t seq, uint32_t rtptime)
    1010             : {
    1011             :     int i;
    1012           0 :     if (!rtptime || !url[0])
    1013           0 :         return;
    1014           0 :     if (rt->transport != RTSP_TRANSPORT_RTP)
    1015           0 :         return;
    1016           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
    1017           0 :         RTSPStream *rtsp_st = rt->rtsp_streams[i];
    1018           0 :         RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
    1019           0 :         if (!rtpctx)
    1020           0 :             continue;
    1021           0 :         if (!strcmp(rtsp_st->control_url, url)) {
    1022           0 :             rtpctx->base_timestamp = rtptime;
    1023           0 :             break;
    1024             :         }
    1025             :     }
    1026             : }
    1027             : 
    1028           0 : static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
    1029             : {
    1030           0 :     int read = 0;
    1031           0 :     char key[20], value[1024], url[1024] = "";
    1032           0 :     uint32_t seq = 0, rtptime = 0;
    1033             : 
    1034             :     for (;;) {
    1035           0 :         p += strspn(p, SPACE_CHARS);
    1036           0 :         if (!*p)
    1037           0 :             break;
    1038           0 :         get_word_sep(key, sizeof(key), "=", &p);
    1039           0 :         if (*p != '=')
    1040           0 :             break;
    1041           0 :         p++;
    1042           0 :         get_word_sep(value, sizeof(value), ";, ", &p);
    1043           0 :         read++;
    1044           0 :         if (!strcmp(key, "url"))
    1045           0 :             av_strlcpy(url, value, sizeof(url));
    1046           0 :         else if (!strcmp(key, "seq"))
    1047           0 :             seq = strtoul(value, NULL, 10);
    1048           0 :         else if (!strcmp(key, "rtptime"))
    1049           0 :             rtptime = strtoul(value, NULL, 10);
    1050           0 :         if (*p == ',') {
    1051           0 :             handle_rtp_info(rt, url, seq, rtptime);
    1052           0 :             url[0] = '\0';
    1053           0 :             seq = rtptime = 0;
    1054           0 :             read = 0;
    1055             :         }
    1056           0 :         if (*p)
    1057           0 :             p++;
    1058             :     }
    1059           0 :     if (read > 0)
    1060           0 :         handle_rtp_info(rt, url, seq, rtptime);
    1061           0 : }
    1062             : 
    1063           0 : void ff_rtsp_parse_line(AVFormatContext *s,
    1064             :                         RTSPMessageHeader *reply, const char *buf,
    1065             :                         RTSPState *rt, const char *method)
    1066             : {
    1067             :     const char *p;
    1068             : 
    1069             :     /* NOTE: we do case independent match for broken servers */
    1070           0 :     p = buf;
    1071           0 :     if (av_stristart(p, "Session:", &p)) {
    1072             :         int t;
    1073           0 :         get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
    1074           0 :         if (av_stristart(p, ";timeout=", &p) &&
    1075           0 :             (t = strtol(p, NULL, 10)) > 0) {
    1076           0 :             reply->timeout = t;
    1077             :         }
    1078           0 :     } else if (av_stristart(p, "Content-Length:", &p)) {
    1079           0 :         reply->content_length = strtol(p, NULL, 10);
    1080           0 :     } else if (av_stristart(p, "Transport:", &p)) {
    1081           0 :         rtsp_parse_transport(s, reply, p);
    1082           0 :     } else if (av_stristart(p, "CSeq:", &p)) {
    1083           0 :         reply->seq = strtol(p, NULL, 10);
    1084           0 :     } else if (av_stristart(p, "Range:", &p)) {
    1085           0 :         rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
    1086           0 :     } else if (av_stristart(p, "RealChallenge1:", &p)) {
    1087           0 :         p += strspn(p, SPACE_CHARS);
    1088           0 :         av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
    1089           0 :     } else if (av_stristart(p, "Server:", &p)) {
    1090           0 :         p += strspn(p, SPACE_CHARS);
    1091           0 :         av_strlcpy(reply->server, p, sizeof(reply->server));
    1092           0 :     } else if (av_stristart(p, "Notice:", &p) ||
    1093           0 :                av_stristart(p, "X-Notice:", &p)) {
    1094           0 :         reply->notice = strtol(p, NULL, 10);
    1095           0 :     } else if (av_stristart(p, "Location:", &p)) {
    1096           0 :         p += strspn(p, SPACE_CHARS);
    1097           0 :         av_strlcpy(reply->location, p , sizeof(reply->location));
    1098           0 :     } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
    1099           0 :         p += strspn(p, SPACE_CHARS);
    1100           0 :         ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
    1101           0 :     } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
    1102           0 :         p += strspn(p, SPACE_CHARS);
    1103           0 :         ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
    1104           0 :     } else if (av_stristart(p, "Content-Base:", &p) && rt) {
    1105           0 :         p += strspn(p, SPACE_CHARS);
    1106           0 :         if (method && !strcmp(method, "DESCRIBE"))
    1107           0 :             av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
    1108           0 :     } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
    1109           0 :         p += strspn(p, SPACE_CHARS);
    1110           0 :         if (method && !strcmp(method, "PLAY"))
    1111           0 :             rtsp_parse_rtp_info(rt, p);
    1112           0 :     } else if (av_stristart(p, "Public:", &p) && rt) {
    1113           0 :         if (strstr(p, "GET_PARAMETER") &&
    1114           0 :             method && !strcmp(method, "OPTIONS"))
    1115           0 :             rt->get_parameter_supported = 1;
    1116           0 :     } else if (av_stristart(p, "x-Accept-Dynamic-Rate:", &p) && rt) {
    1117           0 :         p += strspn(p, SPACE_CHARS);
    1118           0 :         rt->accept_dynamic_rate = atoi(p);
    1119           0 :     } else if (av_stristart(p, "Content-Type:", &p)) {
    1120           0 :         p += strspn(p, SPACE_CHARS);
    1121           0 :         av_strlcpy(reply->content_type, p, sizeof(reply->content_type));
    1122             :     }
    1123           0 : }
    1124             : 
    1125             : /* skip a RTP/TCP interleaved packet */
    1126           0 : void ff_rtsp_skip_packet(AVFormatContext *s)
    1127             : {
    1128           0 :     RTSPState *rt = s->priv_data;
    1129             :     int ret, len, len1;
    1130             :     uint8_t buf[1024];
    1131             : 
    1132           0 :     ret = ffurl_read_complete(rt->rtsp_hd, buf, 3);
    1133           0 :     if (ret != 3)
    1134           0 :         return;
    1135           0 :     len = AV_RB16(buf + 1);
    1136             : 
    1137           0 :     av_log(s, AV_LOG_TRACE, "skipping RTP packet len=%d\n", len);
    1138             : 
    1139             :     /* skip payload */
    1140           0 :     while (len > 0) {
    1141           0 :         len1 = len;
    1142           0 :         if (len1 > sizeof(buf))
    1143           0 :             len1 = sizeof(buf);
    1144           0 :         ret = ffurl_read_complete(rt->rtsp_hd, buf, len1);
    1145           0 :         if (ret != len1)
    1146           0 :             return;
    1147           0 :         len -= len1;
    1148             :     }
    1149             : }
    1150             : 
    1151           0 : int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
    1152             :                        unsigned char **content_ptr,
    1153             :                        int return_on_interleaved_data, const char *method)
    1154             : {
    1155           0 :     RTSPState *rt = s->priv_data;
    1156             :     char buf[4096], buf1[1024], *q;
    1157             :     unsigned char ch;
    1158             :     const char *p;
    1159           0 :     int ret, content_length, line_count = 0, request = 0;
    1160           0 :     unsigned char *content = NULL;
    1161             : 
    1162           0 : start:
    1163           0 :     line_count = 0;
    1164           0 :     request = 0;
    1165           0 :     content = NULL;
    1166           0 :     memset(reply, 0, sizeof(*reply));
    1167             : 
    1168             :     /* parse reply (XXX: use buffers) */
    1169           0 :     rt->last_reply[0] = '\0';
    1170             :     for (;;) {
    1171           0 :         q = buf;
    1172             :         for (;;) {
    1173           0 :             ret = ffurl_read_complete(rt->rtsp_hd, &ch, 1);
    1174           0 :             av_log(s, AV_LOG_TRACE, "ret=%d c=%02x [%c]\n", ret, ch, ch);
    1175           0 :             if (ret != 1)
    1176           0 :                 return AVERROR_EOF;
    1177           0 :             if (ch == '\n')
    1178           0 :                 break;
    1179           0 :             if (ch == '$' && q == buf) {
    1180           0 :                 if (return_on_interleaved_data) {
    1181           0 :                     return 1;
    1182             :                 } else
    1183           0 :                     ff_rtsp_skip_packet(s);
    1184           0 :             } else if (ch != '\r') {
    1185           0 :                 if ((q - buf) < sizeof(buf) - 1)
    1186           0 :                     *q++ = ch;
    1187             :             }
    1188             :         }
    1189           0 :         *q = '\0';
    1190             : 
    1191           0 :         av_log(s, AV_LOG_TRACE, "line='%s'\n", buf);
    1192             : 
    1193             :         /* test if last line */
    1194           0 :         if (buf[0] == '\0')
    1195           0 :             break;
    1196           0 :         p = buf;
    1197           0 :         if (line_count == 0) {
    1198             :             /* get reply code */
    1199           0 :             get_word(buf1, sizeof(buf1), &p);
    1200           0 :             if (!strncmp(buf1, "RTSP/", 5)) {
    1201           0 :                 get_word(buf1, sizeof(buf1), &p);
    1202           0 :                 reply->status_code = atoi(buf1);
    1203           0 :                 av_strlcpy(reply->reason, p, sizeof(reply->reason));
    1204             :             } else {
    1205           0 :                 av_strlcpy(reply->reason, buf1, sizeof(reply->reason)); // method
    1206           0 :                 get_word(buf1, sizeof(buf1), &p); // object
    1207           0 :                 request = 1;
    1208             :             }
    1209             :         } else {
    1210           0 :             ff_rtsp_parse_line(s, reply, p, rt, method);
    1211           0 :             av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
    1212           0 :             av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
    1213             :         }
    1214           0 :         line_count++;
    1215             :     }
    1216             : 
    1217           0 :     if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0' && !request)
    1218           0 :         av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
    1219             : 
    1220           0 :     content_length = reply->content_length;
    1221           0 :     if (content_length > 0) {
    1222             :         /* leave some room for a trailing '\0' (useful for simple parsing) */
    1223           0 :         content = av_malloc(content_length + 1);
    1224           0 :         if (!content)
    1225           0 :             return AVERROR(ENOMEM);
    1226           0 :         ffurl_read_complete(rt->rtsp_hd, content, content_length);
    1227           0 :         content[content_length] = '\0';
    1228             :     }
    1229           0 :     if (content_ptr)
    1230           0 :         *content_ptr = content;
    1231             :     else
    1232           0 :         av_freep(&content);
    1233             : 
    1234           0 :     if (request) {
    1235             :         char buf[1024];
    1236             :         char base64buf[AV_BASE64_SIZE(sizeof(buf))];
    1237           0 :         const char* ptr = buf;
    1238             : 
    1239           0 :         if (!strcmp(reply->reason, "OPTIONS")) {
    1240           0 :             snprintf(buf, sizeof(buf), "RTSP/1.0 200 OK\r\n");
    1241           0 :             if (reply->seq)
    1242           0 :                 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", reply->seq);
    1243           0 :             if (reply->session_id[0])
    1244           0 :                 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n",
    1245           0 :                                               reply->session_id);
    1246             :         } else {
    1247           0 :             snprintf(buf, sizeof(buf), "RTSP/1.0 501 Not Implemented\r\n");
    1248             :         }
    1249           0 :         av_strlcat(buf, "\r\n", sizeof(buf));
    1250             : 
    1251           0 :         if (rt->control_transport == RTSP_MODE_TUNNEL) {
    1252           0 :             av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
    1253           0 :             ptr = base64buf;
    1254             :         }
    1255           0 :         ffurl_write(rt->rtsp_hd_out, ptr, strlen(ptr));
    1256             : 
    1257           0 :         rt->last_cmd_time = av_gettime_relative();
    1258             :         /* Even if the request from the server had data, it is not the data
    1259             :          * that the caller wants or expects. The memory could also be leaked
    1260             :          * if the actual following reply has content data. */
    1261           0 :         if (content_ptr)
    1262           0 :             av_freep(content_ptr);
    1263             :         /* If method is set, this is called from ff_rtsp_send_cmd,
    1264             :          * where a reply to exactly this request is awaited. For
    1265             :          * callers from within packet receiving, we just want to
    1266             :          * return to the caller and go back to receiving packets. */
    1267           0 :         if (method)
    1268           0 :             goto start;
    1269           0 :         return 0;
    1270             :     }
    1271             : 
    1272           0 :     if (rt->seq != reply->seq) {
    1273           0 :         av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
    1274             :             rt->seq, reply->seq);
    1275             :     }
    1276             : 
    1277             :     /* EOS */
    1278           0 :     if (reply->notice == 2101 /* End-of-Stream Reached */      ||
    1279           0 :         reply->notice == 2104 /* Start-of-Stream Reached */    ||
    1280           0 :         reply->notice == 2306 /* Continuous Feed Terminated */) {
    1281           0 :         rt->state = RTSP_STATE_IDLE;
    1282           0 :     } else if (reply->notice >= 4400 && reply->notice < 5500) {
    1283           0 :         return AVERROR(EIO); /* data or server error */
    1284           0 :     } else if (reply->notice == 2401 /* Ticket Expired */ ||
    1285           0 :              (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
    1286           0 :         return AVERROR(EPERM);
    1287             : 
    1288           0 :     return 0;
    1289             : }
    1290             : 
    1291             : /**
    1292             :  * Send a command to the RTSP server without waiting for the reply.
    1293             :  *
    1294             :  * @param s RTSP (de)muxer context
    1295             :  * @param method the method for the request
    1296             :  * @param url the target url for the request
    1297             :  * @param headers extra header lines to include in the request
    1298             :  * @param send_content if non-null, the data to send as request body content
    1299             :  * @param send_content_length the length of the send_content data, or 0 if
    1300             :  *                            send_content is null
    1301             :  *
    1302             :  * @return zero if success, nonzero otherwise
    1303             :  */
    1304           0 : static int rtsp_send_cmd_with_content_async(AVFormatContext *s,
    1305             :                                             const char *method, const char *url,
    1306             :                                             const char *headers,
    1307             :                                             const unsigned char *send_content,
    1308             :                                             int send_content_length)
    1309             : {
    1310           0 :     RTSPState *rt = s->priv_data;
    1311             :     char buf[4096], *out_buf;
    1312             :     char base64buf[AV_BASE64_SIZE(sizeof(buf))];
    1313             : 
    1314             :     /* Add in RTSP headers */
    1315           0 :     out_buf = buf;
    1316           0 :     rt->seq++;
    1317           0 :     snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
    1318           0 :     if (headers)
    1319           0 :         av_strlcat(buf, headers, sizeof(buf));
    1320           0 :     av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
    1321           0 :     av_strlcatf(buf, sizeof(buf), "User-Agent: %s\r\n",  rt->user_agent);
    1322           0 :     if (rt->session_id[0] != '\0' && (!headers ||
    1323           0 :         !strstr(headers, "\nIf-Match:"))) {
    1324           0 :         av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
    1325             :     }
    1326           0 :     if (rt->auth[0]) {
    1327           0 :         char *str = ff_http_auth_create_response(&rt->auth_state,
    1328           0 :                                                  rt->auth, url, method);
    1329           0 :         if (str)
    1330           0 :             av_strlcat(buf, str, sizeof(buf));
    1331           0 :         av_free(str);
    1332             :     }
    1333           0 :     if (send_content_length > 0 && send_content)
    1334           0 :         av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
    1335           0 :     av_strlcat(buf, "\r\n", sizeof(buf));
    1336             : 
    1337             :     /* base64 encode rtsp if tunneling */
    1338           0 :     if (rt->control_transport == RTSP_MODE_TUNNEL) {
    1339           0 :         av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
    1340           0 :         out_buf = base64buf;
    1341             :     }
    1342             : 
    1343           0 :     av_log(s, AV_LOG_TRACE, "Sending:\n%s--\n", buf);
    1344             : 
    1345           0 :     ffurl_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
    1346           0 :     if (send_content_length > 0 && send_content) {
    1347           0 :         if (rt->control_transport == RTSP_MODE_TUNNEL) {
    1348           0 :             avpriv_report_missing_feature(s, "Tunneling of RTSP requests with content data");
    1349           0 :             return AVERROR_PATCHWELCOME;
    1350             :         }
    1351           0 :         ffurl_write(rt->rtsp_hd_out, send_content, send_content_length);
    1352             :     }
    1353           0 :     rt->last_cmd_time = av_gettime_relative();
    1354             : 
    1355           0 :     return 0;
    1356             : }
    1357             : 
    1358           0 : int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
    1359             :                            const char *url, const char *headers)
    1360             : {
    1361           0 :     return rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
    1362             : }
    1363             : 
    1364           0 : int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
    1365             :                      const char *headers, RTSPMessageHeader *reply,
    1366             :                      unsigned char **content_ptr)
    1367             : {
    1368           0 :     return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
    1369             :                                          content_ptr, NULL, 0);
    1370             : }
    1371             : 
    1372           0 : int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
    1373             :                                   const char *method, const char *url,
    1374             :                                   const char *header,
    1375             :                                   RTSPMessageHeader *reply,
    1376             :                                   unsigned char **content_ptr,
    1377             :                                   const unsigned char *send_content,
    1378             :                                   int send_content_length)
    1379             : {
    1380           0 :     RTSPState *rt = s->priv_data;
    1381             :     HTTPAuthType cur_auth_type;
    1382           0 :     int ret, attempts = 0;
    1383             : 
    1384           0 : retry:
    1385           0 :     cur_auth_type = rt->auth_state.auth_type;
    1386           0 :     if ((ret = rtsp_send_cmd_with_content_async(s, method, url, header,
    1387             :                                                 send_content,
    1388             :                                                 send_content_length)))
    1389           0 :         return ret;
    1390             : 
    1391           0 :     if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
    1392           0 :         return ret;
    1393           0 :     attempts++;
    1394             : 
    1395           0 :     if (reply->status_code == 401 &&
    1396           0 :         (cur_auth_type == HTTP_AUTH_NONE || rt->auth_state.stale) &&
    1397           0 :         rt->auth_state.auth_type != HTTP_AUTH_NONE && attempts < 2)
    1398           0 :         goto retry;
    1399             : 
    1400           0 :     if (reply->status_code > 400){
    1401           0 :         av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
    1402             :                method,
    1403           0 :                reply->status_code,
    1404           0 :                reply->reason);
    1405           0 :         av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
    1406             :     }
    1407             : 
    1408           0 :     return 0;
    1409             : }
    1410             : 
    1411           0 : int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
    1412             :                               int lower_transport, const char *real_challenge)
    1413             : {
    1414           0 :     RTSPState *rt = s->priv_data;
    1415           0 :     int rtx = 0, j, i, err, interleave = 0, port_off;
    1416             :     RTSPStream *rtsp_st;
    1417           0 :     RTSPMessageHeader reply1, *reply = &reply1;
    1418             :     char cmd[2048];
    1419             :     const char *trans_pref;
    1420             : 
    1421           0 :     if (rt->transport == RTSP_TRANSPORT_RDT)
    1422           0 :         trans_pref = "x-pn-tng";
    1423           0 :     else if (rt->transport == RTSP_TRANSPORT_RAW)
    1424           0 :         trans_pref = "RAW/RAW";
    1425             :     else
    1426           0 :         trans_pref = "RTP/AVP";
    1427             : 
    1428             :     /* default timeout: 1 minute */
    1429           0 :     rt->timeout = 60;
    1430             : 
    1431             :     /* Choose a random starting offset within the first half of the
    1432             :      * port range, to allow for a number of ports to try even if the offset
    1433             :      * happens to be at the end of the random range. */
    1434           0 :     port_off = av_get_random_seed() % ((rt->rtp_port_max - rt->rtp_port_min)/2);
    1435             :     /* even random offset */
    1436           0 :     port_off -= port_off & 0x01;
    1437             : 
    1438           0 :     for (j = rt->rtp_port_min + port_off, i = 0; i < rt->nb_rtsp_streams; ++i) {
    1439             :         char transport[2048];
    1440             : 
    1441             :         /*
    1442             :          * WMS serves all UDP data over a single connection, the RTX, which
    1443             :          * isn't necessarily the first in the SDP but has to be the first
    1444             :          * to be set up, else the second/third SETUP will fail with a 461.
    1445             :          */
    1446           0 :         if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
    1447           0 :              rt->server_type == RTSP_SERVER_WMS) {
    1448           0 :             if (i == 0) {
    1449             :                 /* rtx first */
    1450           0 :                 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
    1451           0 :                     int len = strlen(rt->rtsp_streams[rtx]->control_url);
    1452           0 :                     if (len >= 4 &&
    1453           0 :                         !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
    1454             :                                 "/rtx"))
    1455           0 :                         break;
    1456             :                 }
    1457           0 :                 if (rtx == rt->nb_rtsp_streams)
    1458           0 :                     return -1; /* no RTX found */
    1459           0 :                 rtsp_st = rt->rtsp_streams[rtx];
    1460             :             } else
    1461           0 :                 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
    1462             :         } else
    1463           0 :             rtsp_st = rt->rtsp_streams[i];
    1464             : 
    1465             :         /* RTP/UDP */
    1466           0 :         if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
    1467             :             char buf[256];
    1468             : 
    1469           0 :             if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
    1470           0 :                 port = reply->transports[0].client_port_min;
    1471           0 :                 goto have_port;
    1472             :             }
    1473             : 
    1474             :             /* first try in specified port range */
    1475           0 :             while (j <= rt->rtp_port_max) {
    1476           0 :                 AVDictionary *opts = map_to_opts(rt);
    1477             : 
    1478           0 :                 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
    1479             :                             "?localport=%d", j);
    1480             :                 /* we will use two ports per rtp stream (rtp and rtcp) */
    1481           0 :                 j += 2;
    1482           0 :                 err = ffurl_open_whitelist(&rtsp_st->rtp_handle, buf, AVIO_FLAG_READ_WRITE,
    1483           0 :                                  &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
    1484             : 
    1485           0 :                 av_dict_free(&opts);
    1486             : 
    1487           0 :                 if (!err)
    1488           0 :                     goto rtp_opened;
    1489             :             }
    1490           0 :             av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
    1491           0 :             err = AVERROR(EIO);
    1492           0 :             goto fail;
    1493             : 
    1494           0 :         rtp_opened:
    1495           0 :             port = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
    1496           0 :         have_port:
    1497           0 :             snprintf(transport, sizeof(transport) - 1,
    1498             :                      "%s/UDP;", trans_pref);
    1499           0 :             if (rt->server_type != RTSP_SERVER_REAL)
    1500           0 :                 av_strlcat(transport, "unicast;", sizeof(transport));
    1501           0 :             av_strlcatf(transport, sizeof(transport),
    1502             :                      "client_port=%d", port);
    1503           0 :             if (rt->transport == RTSP_TRANSPORT_RTP &&
    1504           0 :                 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
    1505           0 :                 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
    1506             :         }
    1507             : 
    1508             :         /* RTP/TCP */
    1509           0 :         else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
    1510             :             /* For WMS streams, the application streams are only used for
    1511             :              * UDP. When trying to set it up for TCP streams, the server
    1512             :              * will return an error. Therefore, we skip those streams. */
    1513           0 :             if (rt->server_type == RTSP_SERVER_WMS &&
    1514           0 :                 (rtsp_st->stream_index < 0 ||
    1515           0 :                  s->streams[rtsp_st->stream_index]->codecpar->codec_type ==
    1516             :                     AVMEDIA_TYPE_DATA))
    1517           0 :                 continue;
    1518           0 :             snprintf(transport, sizeof(transport) - 1,
    1519             :                      "%s/TCP;", trans_pref);
    1520           0 :             if (rt->transport != RTSP_TRANSPORT_RDT)
    1521           0 :                 av_strlcat(transport, "unicast;", sizeof(transport));
    1522           0 :             av_strlcatf(transport, sizeof(transport),
    1523             :                         "interleaved=%d-%d",
    1524             :                         interleave, interleave + 1);
    1525           0 :             interleave += 2;
    1526             :         }
    1527             : 
    1528           0 :         else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
    1529           0 :             snprintf(transport, sizeof(transport) - 1,
    1530             :                      "%s/UDP;multicast", trans_pref);
    1531             :         }
    1532           0 :         if (s->oformat) {
    1533           0 :             av_strlcat(transport, ";mode=record", sizeof(transport));
    1534           0 :         } else if (rt->server_type == RTSP_SERVER_REAL ||
    1535           0 :                    rt->server_type == RTSP_SERVER_WMS)
    1536           0 :             av_strlcat(transport, ";mode=play", sizeof(transport));
    1537           0 :         snprintf(cmd, sizeof(cmd),
    1538             :                  "Transport: %s\r\n",
    1539             :                  transport);
    1540           0 :         if (rt->accept_dynamic_rate)
    1541           0 :             av_strlcat(cmd, "x-Dynamic-Rate: 0\r\n", sizeof(cmd));
    1542           0 :         if (CONFIG_RTPDEC && i == 0 && rt->server_type == RTSP_SERVER_REAL) {
    1543             :             char real_res[41], real_csum[9];
    1544           0 :             ff_rdt_calc_response_and_checksum(real_res, real_csum,
    1545             :                                               real_challenge);
    1546           0 :             av_strlcatf(cmd, sizeof(cmd),
    1547             :                         "If-Match: %s\r\n"
    1548             :                         "RealChallenge2: %s, sd=%s\r\n",
    1549           0 :                         rt->session_id, real_res, real_csum);
    1550             :         }
    1551           0 :         ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
    1552           0 :         if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
    1553           0 :             err = 1;
    1554           0 :             goto fail;
    1555           0 :         } else if (reply->status_code != RTSP_STATUS_OK ||
    1556           0 :                    reply->nb_transports != 1) {
    1557           0 :             err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
    1558           0 :             goto fail;
    1559             :         }
    1560             : 
    1561             :         /* XXX: same protocol for all streams is required */
    1562           0 :         if (i > 0) {
    1563           0 :             if (reply->transports[0].lower_transport != rt->lower_transport ||
    1564           0 :                 reply->transports[0].transport != rt->transport) {
    1565           0 :                 err = AVERROR_INVALIDDATA;
    1566           0 :                 goto fail;
    1567             :             }
    1568             :         } else {
    1569           0 :             rt->lower_transport = reply->transports[0].lower_transport;
    1570           0 :             rt->transport = reply->transports[0].transport;
    1571             :         }
    1572             : 
    1573             :         /* Fail if the server responded with another lower transport mode
    1574             :          * than what we requested. */
    1575           0 :         if (reply->transports[0].lower_transport != lower_transport) {
    1576           0 :             av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
    1577           0 :             err = AVERROR_INVALIDDATA;
    1578           0 :             goto fail;
    1579             :         }
    1580             : 
    1581           0 :         switch(reply->transports[0].lower_transport) {
    1582           0 :         case RTSP_LOWER_TRANSPORT_TCP:
    1583           0 :             rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
    1584           0 :             rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
    1585           0 :             break;
    1586             : 
    1587           0 :         case RTSP_LOWER_TRANSPORT_UDP: {
    1588           0 :             char url[1024], options[30] = "";
    1589           0 :             const char *peer = host;
    1590             : 
    1591           0 :             if (rt->rtsp_flags & RTSP_FLAG_FILTER_SRC)
    1592           0 :                 av_strlcpy(options, "?connect=1", sizeof(options));
    1593             :             /* Use source address if specified */
    1594           0 :             if (reply->transports[0].source[0])
    1595           0 :                 peer = reply->transports[0].source;
    1596           0 :             ff_url_join(url, sizeof(url), "rtp", NULL, peer,
    1597             :                         reply->transports[0].server_port_min, "%s", options);
    1598           0 :             if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
    1599           0 :                 ff_rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
    1600           0 :                 err = AVERROR_INVALIDDATA;
    1601           0 :                 goto fail;
    1602             :             }
    1603           0 :             break;
    1604             :         }
    1605           0 :         case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
    1606           0 :             char url[1024], namebuf[50], optbuf[20] = "";
    1607             :             struct sockaddr_storage addr;
    1608             :             int port, ttl;
    1609             : 
    1610           0 :             if (reply->transports[0].destination.ss_family) {
    1611           0 :                 addr      = reply->transports[0].destination;
    1612           0 :                 port      = reply->transports[0].port_min;
    1613           0 :                 ttl       = reply->transports[0].ttl;
    1614             :             } else {
    1615           0 :                 addr      = rtsp_st->sdp_ip;
    1616           0 :                 port      = rtsp_st->sdp_port;
    1617           0 :                 ttl       = rtsp_st->sdp_ttl;
    1618             :             }
    1619           0 :             if (ttl > 0)
    1620           0 :                 snprintf(optbuf, sizeof(optbuf), "?ttl=%d", ttl);
    1621           0 :             getnameinfo((struct sockaddr*) &addr, sizeof(addr),
    1622             :                         namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
    1623           0 :             ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
    1624             :                         port, "%s", optbuf);
    1625           0 :             if (ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
    1626           0 :                            &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL) < 0) {
    1627           0 :                 err = AVERROR_INVALIDDATA;
    1628           0 :                 goto fail;
    1629             :             }
    1630           0 :             break;
    1631             :         }
    1632             :         }
    1633             : 
    1634           0 :         if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
    1635           0 :             goto fail;
    1636             :     }
    1637             : 
    1638           0 :     if (rt->nb_rtsp_streams && reply->timeout > 0)
    1639           0 :         rt->timeout = reply->timeout;
    1640             : 
    1641           0 :     if (rt->server_type == RTSP_SERVER_REAL)
    1642           0 :         rt->need_subscription = 1;
    1643             : 
    1644           0 :     return 0;
    1645             : 
    1646           0 : fail:
    1647           0 :     ff_rtsp_undo_setup(s, 0);
    1648           0 :     return err;
    1649             : }
    1650             : 
    1651           0 : void ff_rtsp_close_connections(AVFormatContext *s)
    1652             : {
    1653           0 :     RTSPState *rt = s->priv_data;
    1654           0 :     if (rt->rtsp_hd_out != rt->rtsp_hd) ffurl_close(rt->rtsp_hd_out);
    1655           0 :     ffurl_close(rt->rtsp_hd);
    1656           0 :     rt->rtsp_hd = rt->rtsp_hd_out = NULL;
    1657           0 : }
    1658             : 
    1659           0 : int ff_rtsp_connect(AVFormatContext *s)
    1660             : {
    1661           0 :     RTSPState *rt = s->priv_data;
    1662             :     char proto[128], host[1024], path[1024];
    1663             :     char tcpname[1024], cmd[2048], auth[128];
    1664           0 :     const char *lower_rtsp_proto = "tcp";
    1665             :     int port, err, tcp_fd;
    1666           0 :     RTSPMessageHeader reply1 = {0}, *reply = &reply1;
    1667           0 :     int lower_transport_mask = 0;
    1668           0 :     int default_port = RTSP_DEFAULT_PORT;
    1669           0 :     char real_challenge[64] = "";
    1670             :     struct sockaddr_storage peer;
    1671           0 :     socklen_t peer_len = sizeof(peer);
    1672             : 
    1673           0 :     if (rt->rtp_port_max < rt->rtp_port_min) {
    1674           0 :         av_log(s, AV_LOG_ERROR, "Invalid UDP port range, max port %d less "
    1675             :                                 "than min port %d\n", rt->rtp_port_max,
    1676             :                                                       rt->rtp_port_min);
    1677           0 :         return AVERROR(EINVAL);
    1678             :     }
    1679             : 
    1680           0 :     if (!ff_network_init())
    1681           0 :         return AVERROR(EIO);
    1682             : 
    1683           0 :     if (s->max_delay < 0) /* Not set by the caller */
    1684           0 :         s->max_delay = s->iformat ? DEFAULT_REORDERING_DELAY : 0;
    1685             : 
    1686           0 :     rt->control_transport = RTSP_MODE_PLAIN;
    1687           0 :     if (rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_HTTP)) {
    1688           0 :         rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
    1689           0 :         rt->control_transport = RTSP_MODE_TUNNEL;
    1690             :     }
    1691             :     /* Only pass through valid flags from here */
    1692           0 :     rt->lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
    1693             : 
    1694           0 : redirect:
    1695             :     /* extract hostname and port */
    1696           0 :     av_url_split(proto, sizeof(proto), auth, sizeof(auth),
    1697           0 :                  host, sizeof(host), &port, path, sizeof(path), s->url);
    1698             : 
    1699           0 :     if (!strcmp(proto, "rtsps")) {
    1700           0 :         lower_rtsp_proto         = "tls";
    1701           0 :         default_port             = RTSPS_DEFAULT_PORT;
    1702           0 :         rt->lower_transport_mask = 1 << RTSP_LOWER_TRANSPORT_TCP;
    1703             :     }
    1704             : 
    1705           0 :     if (*auth) {
    1706           0 :         av_strlcpy(rt->auth, auth, sizeof(rt->auth));
    1707             :     }
    1708           0 :     if (port < 0)
    1709           0 :         port = default_port;
    1710             : 
    1711           0 :     lower_transport_mask = rt->lower_transport_mask;
    1712             : 
    1713           0 :     if (!lower_transport_mask)
    1714           0 :         lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
    1715             : 
    1716           0 :     if (s->oformat) {
    1717             :         /* Only UDP or TCP - UDP multicast isn't supported. */
    1718           0 :         lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
    1719             :                                 (1 << RTSP_LOWER_TRANSPORT_TCP);
    1720           0 :         if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
    1721           0 :             av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
    1722             :                                     "only UDP and TCP are supported for output.\n");
    1723           0 :             err = AVERROR(EINVAL);
    1724           0 :             goto fail;
    1725             :         }
    1726             :     }
    1727             : 
    1728             :     /* Construct the URI used in request; this is similar to s->url,
    1729             :      * but with authentication credentials removed and RTSP specific options
    1730             :      * stripped out. */
    1731           0 :     ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL,
    1732             :                 host, port, "%s", path);
    1733             : 
    1734           0 :     if (rt->control_transport == RTSP_MODE_TUNNEL) {
    1735             :         /* set up initial handshake for tunneling */
    1736             :         char httpname[1024];
    1737             :         char sessioncookie[17];
    1738             :         char headers[1024];
    1739             : 
    1740           0 :         ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
    1741           0 :         snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
    1742             :                  av_get_random_seed(), av_get_random_seed());
    1743             : 
    1744             :         /* GET requests */
    1745           0 :         if (ffurl_alloc(&rt->rtsp_hd, httpname, AVIO_FLAG_READ,
    1746           0 :                         &s->interrupt_callback) < 0) {
    1747           0 :             err = AVERROR(EIO);
    1748           0 :             goto fail;
    1749             :         }
    1750             : 
    1751             :         /* generate GET headers */
    1752           0 :         snprintf(headers, sizeof(headers),
    1753             :                  "x-sessioncookie: %s\r\n"
    1754             :                  "Accept: application/x-rtsp-tunnelled\r\n"
    1755             :                  "Pragma: no-cache\r\n"
    1756             :                  "Cache-Control: no-cache\r\n",
    1757             :                  sessioncookie);
    1758           0 :         av_opt_set(rt->rtsp_hd->priv_data, "headers", headers, 0);
    1759             : 
    1760           0 :         if (!rt->rtsp_hd->protocol_whitelist && s->protocol_whitelist) {
    1761           0 :             rt->rtsp_hd->protocol_whitelist = av_strdup(s->protocol_whitelist);
    1762           0 :             if (!rt->rtsp_hd->protocol_whitelist) {
    1763           0 :                 err = AVERROR(ENOMEM);
    1764           0 :                 goto fail;
    1765             :             }
    1766             :         }
    1767             : 
    1768             :         /* complete the connection */
    1769           0 :         if (ffurl_connect(rt->rtsp_hd, NULL)) {
    1770           0 :             err = AVERROR(EIO);
    1771           0 :             goto fail;
    1772             :         }
    1773             : 
    1774             :         /* POST requests */
    1775           0 :         if (ffurl_alloc(&rt->rtsp_hd_out, httpname, AVIO_FLAG_WRITE,
    1776           0 :                         &s->interrupt_callback) < 0 ) {
    1777           0 :             err = AVERROR(EIO);
    1778           0 :             goto fail;
    1779             :         }
    1780             : 
    1781             :         /* generate POST headers */
    1782           0 :         snprintf(headers, sizeof(headers),
    1783             :                  "x-sessioncookie: %s\r\n"
    1784             :                  "Content-Type: application/x-rtsp-tunnelled\r\n"
    1785             :                  "Pragma: no-cache\r\n"
    1786             :                  "Cache-Control: no-cache\r\n"
    1787             :                  "Content-Length: 32767\r\n"
    1788             :                  "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
    1789             :                  sessioncookie);
    1790           0 :         av_opt_set(rt->rtsp_hd_out->priv_data, "headers", headers, 0);
    1791           0 :         av_opt_set(rt->rtsp_hd_out->priv_data, "chunked_post", "0", 0);
    1792             : 
    1793             :         /* Initialize the authentication state for the POST session. The HTTP
    1794             :          * protocol implementation doesn't properly handle multi-pass
    1795             :          * authentication for POST requests, since it would require one of
    1796             :          * the following:
    1797             :          * - implementing Expect: 100-continue, which many HTTP servers
    1798             :          *   don't support anyway, even less the RTSP servers that do HTTP
    1799             :          *   tunneling
    1800             :          * - sending the whole POST data until getting a 401 reply specifying
    1801             :          *   what authentication method to use, then resending all that data
    1802             :          * - waiting for potential 401 replies directly after sending the
    1803             :          *   POST header (waiting for some unspecified time)
    1804             :          * Therefore, we copy the full auth state, which works for both basic
    1805             :          * and digest. (For digest, we would have to synchronize the nonce
    1806             :          * count variable between the two sessions, if we'd do more requests
    1807             :          * with the original session, though.)
    1808             :          */
    1809           0 :         ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
    1810             : 
    1811             :         /* complete the connection */
    1812           0 :         if (ffurl_connect(rt->rtsp_hd_out, NULL)) {
    1813           0 :             err = AVERROR(EIO);
    1814           0 :             goto fail;
    1815             :         }
    1816             :     } else {
    1817             :         int ret;
    1818             :         /* open the tcp connection */
    1819           0 :         ff_url_join(tcpname, sizeof(tcpname), lower_rtsp_proto, NULL,
    1820             :                     host, port,
    1821             :                     "?timeout=%d", rt->stimeout);
    1822           0 :         if ((ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
    1823           0 :                        &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL)) < 0) {
    1824           0 :             err = ret;
    1825           0 :             goto fail;
    1826             :         }
    1827           0 :         rt->rtsp_hd_out = rt->rtsp_hd;
    1828             :     }
    1829           0 :     rt->seq = 0;
    1830             : 
    1831           0 :     tcp_fd = ffurl_get_file_handle(rt->rtsp_hd);
    1832           0 :     if (tcp_fd < 0) {
    1833           0 :         err = tcp_fd;
    1834           0 :         goto fail;
    1835             :     }
    1836           0 :     if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
    1837           0 :         getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
    1838             :                     NULL, 0, NI_NUMERICHOST);
    1839             :     }
    1840             : 
    1841             :     /* request options supported by the server; this also detects server
    1842             :      * type */
    1843           0 :     for (rt->server_type = RTSP_SERVER_RTP;;) {
    1844           0 :         cmd[0] = 0;
    1845           0 :         if (rt->server_type == RTSP_SERVER_REAL)
    1846           0 :             av_strlcat(cmd,
    1847             :                        /*
    1848             :                         * The following entries are required for proper
    1849             :                         * streaming from a Realmedia server. They are
    1850             :                         * interdependent in some way although we currently
    1851             :                         * don't quite understand how. Values were copied
    1852             :                         * from mplayer SVN r23589.
    1853             :                         *   ClientChallenge is a 16-byte ID in hex
    1854             :                         *   CompanyID is a 16-byte ID in base64
    1855             :                         */
    1856             :                        "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
    1857             :                        "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
    1858             :                        "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
    1859             :                        "GUID: 00000000-0000-0000-0000-000000000000\r\n",
    1860             :                        sizeof(cmd));
    1861           0 :         ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
    1862           0 :         if (reply->status_code != RTSP_STATUS_OK) {
    1863           0 :             err = ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA);
    1864           0 :             goto fail;
    1865             :         }
    1866             : 
    1867             :         /* detect server type if not standard-compliant RTP */
    1868           0 :         if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
    1869           0 :             rt->server_type = RTSP_SERVER_REAL;
    1870           0 :             continue;
    1871           0 :         } else if (!av_strncasecmp(reply->server, "WMServer/", 9)) {
    1872           0 :             rt->server_type = RTSP_SERVER_WMS;
    1873           0 :         } else if (rt->server_type == RTSP_SERVER_REAL)
    1874           0 :             strcpy(real_challenge, reply->real_challenge);
    1875           0 :         break;
    1876             :     }
    1877             : 
    1878           0 :     if (CONFIG_RTSP_DEMUXER && s->iformat)
    1879           0 :         err = ff_rtsp_setup_input_streams(s, reply);
    1880             :     else if (CONFIG_RTSP_MUXER)
    1881           0 :         err = ff_rtsp_setup_output_streams(s, host);
    1882             :     else
    1883             :         av_assert0(0);
    1884           0 :     if (err)
    1885           0 :         goto fail;
    1886             : 
    1887             :     do {
    1888           0 :         int lower_transport = ff_log2_tab[lower_transport_mask &
    1889           0 :                                   ~(lower_transport_mask - 1)];
    1890             : 
    1891           0 :         if ((lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP))
    1892           0 :                 && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP))
    1893           0 :             lower_transport = RTSP_LOWER_TRANSPORT_TCP;
    1894             : 
    1895           0 :         err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
    1896           0 :                                  rt->server_type == RTSP_SERVER_REAL ?
    1897             :                                      real_challenge : NULL);
    1898           0 :         if (err < 0)
    1899           0 :             goto fail;
    1900           0 :         lower_transport_mask &= ~(1 << lower_transport);
    1901           0 :         if (lower_transport_mask == 0 && err == 1) {
    1902           0 :             err = AVERROR(EPROTONOSUPPORT);
    1903           0 :             goto fail;
    1904             :         }
    1905           0 :     } while (err);
    1906             : 
    1907           0 :     rt->lower_transport_mask = lower_transport_mask;
    1908           0 :     av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
    1909           0 :     rt->state = RTSP_STATE_IDLE;
    1910           0 :     rt->seek_timestamp = 0; /* default is to start stream at position zero */
    1911           0 :     return 0;
    1912           0 :  fail:
    1913           0 :     ff_rtsp_close_streams(s);
    1914           0 :     ff_rtsp_close_connections(s);
    1915           0 :     if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
    1916           0 :         char *new_url = av_strdup(reply->location);
    1917           0 :         if (!new_url) {
    1918           0 :             err = AVERROR(ENOMEM);
    1919           0 :             goto fail2;
    1920             :         }
    1921           0 :         ff_format_set_url(s, new_url);
    1922           0 :         rt->session_id[0] = '\0';
    1923           0 :         av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
    1924           0 :                reply->status_code,
    1925             :                s->url);
    1926           0 :         goto redirect;
    1927             :     }
    1928           0 :  fail2:
    1929           0 :     ff_network_close();
    1930           0 :     return err;
    1931             : }
    1932             : #endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
    1933             : 
    1934             : #if CONFIG_RTPDEC
    1935           0 : static int parse_rtsp_message(AVFormatContext *s)
    1936             : {
    1937           0 :     RTSPState *rt = s->priv_data;
    1938             :     int ret;
    1939             : 
    1940           0 :     if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
    1941           0 :         if (rt->state == RTSP_STATE_STREAMING) {
    1942           0 :             if (!ff_rtsp_parse_streaming_commands(s))
    1943           0 :                 return AVERROR_EOF;
    1944             :             else
    1945           0 :                 av_log(s, AV_LOG_WARNING,
    1946             :                        "Unable to answer to TEARDOWN\n");
    1947             :         } else
    1948           0 :             return 0;
    1949             :     } else {
    1950             :         RTSPMessageHeader reply;
    1951           0 :         ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
    1952           0 :         if (ret < 0)
    1953           0 :             return ret;
    1954             :         /* XXX: parse message */
    1955           0 :         if (rt->state != RTSP_STATE_STREAMING)
    1956           0 :             return 0;
    1957             :     }
    1958             : 
    1959           0 :     return 0;
    1960             : }
    1961             : 
    1962           0 : static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
    1963             :                            uint8_t *buf, int buf_size, int64_t wait_end)
    1964             : {
    1965           0 :     RTSPState *rt = s->priv_data;
    1966             :     RTSPStream *rtsp_st;
    1967           0 :     int n, i, ret, timeout_cnt = 0;
    1968           0 :     struct pollfd *p = rt->p;
    1969           0 :     int *fds = NULL, fdsnum, fdsidx;
    1970             : 
    1971           0 :     if (!p) {
    1972           0 :         p = rt->p = av_malloc_array(2 * (rt->nb_rtsp_streams + 1), sizeof(struct pollfd));
    1973           0 :         if (!p)
    1974           0 :             return AVERROR(ENOMEM);
    1975             : 
    1976           0 :         if (rt->rtsp_hd) {
    1977           0 :             p[rt->max_p].fd = ffurl_get_file_handle(rt->rtsp_hd);
    1978           0 :             p[rt->max_p++].events = POLLIN;
    1979             :         }
    1980           0 :         for (i = 0; i < rt->nb_rtsp_streams; i++) {
    1981           0 :             rtsp_st = rt->rtsp_streams[i];
    1982           0 :             if (rtsp_st->rtp_handle) {
    1983           0 :                 if (ret = ffurl_get_multi_file_handle(rtsp_st->rtp_handle,
    1984             :                                                       &fds, &fdsnum)) {
    1985           0 :                     av_log(s, AV_LOG_ERROR, "Unable to recover rtp ports\n");
    1986           0 :                     return ret;
    1987             :                 }
    1988           0 :                 if (fdsnum != 2) {
    1989           0 :                     av_log(s, AV_LOG_ERROR,
    1990             :                            "Number of fds %d not supported\n", fdsnum);
    1991           0 :                     return AVERROR_INVALIDDATA;
    1992             :                 }
    1993           0 :                 for (fdsidx = 0; fdsidx < fdsnum; fdsidx++) {
    1994           0 :                     p[rt->max_p].fd       = fds[fdsidx];
    1995           0 :                     p[rt->max_p++].events = POLLIN;
    1996             :                 }
    1997           0 :                 av_freep(&fds);
    1998             :             }
    1999             :         }
    2000             :     }
    2001             : 
    2002             :     for (;;) {
    2003           0 :         if (ff_check_interrupt(&s->interrupt_callback))
    2004           0 :             return AVERROR_EXIT;
    2005           0 :         if (wait_end && wait_end - av_gettime_relative() < 0)
    2006           0 :             return AVERROR(EAGAIN);
    2007           0 :         n = poll(p, rt->max_p, POLL_TIMEOUT_MS);
    2008           0 :         if (n > 0) {
    2009           0 :             int j = rt->rtsp_hd ? 1 : 0;
    2010           0 :             timeout_cnt = 0;
    2011           0 :             for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2012           0 :                 rtsp_st = rt->rtsp_streams[i];
    2013           0 :                 if (rtsp_st->rtp_handle) {
    2014           0 :                     if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
    2015           0 :                         ret = ffurl_read(rtsp_st->rtp_handle, buf, buf_size);
    2016           0 :                         if (ret > 0) {
    2017           0 :                             *prtsp_st = rtsp_st;
    2018           0 :                             return ret;
    2019             :                         }
    2020             :                     }
    2021           0 :                     j+=2;
    2022             :                 }
    2023             :             }
    2024             : #if CONFIG_RTSP_DEMUXER
    2025           0 :             if (rt->rtsp_hd && p[0].revents & POLLIN) {
    2026           0 :                 if ((ret = parse_rtsp_message(s)) < 0) {
    2027           0 :                     return ret;
    2028             :                 }
    2029             :             }
    2030             : #endif
    2031           0 :         } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
    2032           0 :             return AVERROR(ETIMEDOUT);
    2033           0 :         } else if (n < 0 && errno != EINTR)
    2034           0 :             return AVERROR(errno);
    2035             :     }
    2036             : }
    2037             : 
    2038           0 : static int pick_stream(AVFormatContext *s, RTSPStream **rtsp_st,
    2039             :                        const uint8_t *buf, int len)
    2040             : {
    2041           0 :     RTSPState *rt = s->priv_data;
    2042             :     int i;
    2043           0 :     if (len < 0)
    2044           0 :         return len;
    2045           0 :     if (rt->nb_rtsp_streams == 1) {
    2046           0 :         *rtsp_st = rt->rtsp_streams[0];
    2047           0 :         return len;
    2048             :     }
    2049           0 :     if (len >= 8 && rt->transport == RTSP_TRANSPORT_RTP) {
    2050           0 :         if (RTP_PT_IS_RTCP(rt->recvbuf[1])) {
    2051           0 :             int no_ssrc = 0;
    2052           0 :             for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2053           0 :                 RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
    2054           0 :                 if (!rtpctx)
    2055           0 :                     continue;
    2056           0 :                 if (rtpctx->ssrc == AV_RB32(&buf[4])) {
    2057           0 :                     *rtsp_st = rt->rtsp_streams[i];
    2058           0 :                     return len;
    2059             :                 }
    2060           0 :                 if (!rtpctx->ssrc)
    2061           0 :                     no_ssrc = 1;
    2062             :             }
    2063           0 :             if (no_ssrc) {
    2064           0 :                 av_log(s, AV_LOG_WARNING,
    2065             :                        "Unable to pick stream for packet - SSRC not known for "
    2066             :                        "all streams\n");
    2067           0 :                 return AVERROR(EAGAIN);
    2068             :             }
    2069             :         } else {
    2070           0 :             for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2071           0 :                 if ((buf[1] & 0x7f) == rt->rtsp_streams[i]->sdp_payload_type) {
    2072           0 :                     *rtsp_st = rt->rtsp_streams[i];
    2073           0 :                     return len;
    2074             :                 }
    2075             :             }
    2076             :         }
    2077             :     }
    2078           0 :     av_log(s, AV_LOG_WARNING, "Unable to pick stream for packet\n");
    2079           0 :     return AVERROR(EAGAIN);
    2080             : }
    2081             : 
    2082           0 : static int read_packet(AVFormatContext *s,
    2083             :                        RTSPStream **rtsp_st, RTSPStream *first_queue_st,
    2084             :                        int64_t wait_end)
    2085             : {
    2086           0 :     RTSPState *rt = s->priv_data;
    2087             :     int len;
    2088             : 
    2089           0 :     switch(rt->lower_transport) {
    2090           0 :     default:
    2091             : #if CONFIG_RTSP_DEMUXER
    2092             :     case RTSP_LOWER_TRANSPORT_TCP:
    2093           0 :         len = ff_rtsp_tcp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE);
    2094           0 :         break;
    2095             : #endif
    2096           0 :     case RTSP_LOWER_TRANSPORT_UDP:
    2097             :     case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
    2098           0 :         len = udp_read_packet(s, rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
    2099           0 :         if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
    2100           0 :             ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, (*rtsp_st)->rtp_handle, NULL, len);
    2101           0 :         break;
    2102           0 :     case RTSP_LOWER_TRANSPORT_CUSTOM:
    2103           0 :         if (first_queue_st && rt->transport == RTSP_TRANSPORT_RTP &&
    2104           0 :             wait_end && wait_end < av_gettime_relative())
    2105           0 :             len = AVERROR(EAGAIN);
    2106             :         else
    2107           0 :             len = avio_read_partial(s->pb, rt->recvbuf, RECVBUF_SIZE);
    2108           0 :         len = pick_stream(s, rtsp_st, rt->recvbuf, len);
    2109           0 :         if (len > 0 && (*rtsp_st)->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
    2110           0 :             ff_rtp_check_and_send_back_rr((*rtsp_st)->transport_priv, NULL, s->pb, len);
    2111           0 :         break;
    2112             :     }
    2113             : 
    2114           0 :     if (len == 0)
    2115           0 :         return AVERROR_EOF;
    2116             : 
    2117           0 :     return len;
    2118             : }
    2119             : 
    2120           0 : int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
    2121             : {
    2122           0 :     RTSPState *rt = s->priv_data;
    2123             :     int ret, len;
    2124           0 :     RTSPStream *rtsp_st, *first_queue_st = NULL;
    2125           0 :     int64_t wait_end = 0;
    2126             : 
    2127           0 :     if (rt->nb_byes == rt->nb_rtsp_streams)
    2128           0 :         return AVERROR_EOF;
    2129             : 
    2130             :     /* get next frames from the same RTP packet */
    2131           0 :     if (rt->cur_transport_priv) {
    2132           0 :         if (rt->transport == RTSP_TRANSPORT_RDT) {
    2133           0 :             ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
    2134           0 :         } else if (rt->transport == RTSP_TRANSPORT_RTP) {
    2135           0 :             ret = ff_rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
    2136           0 :         } else if (CONFIG_RTPDEC && rt->ts) {
    2137           0 :             ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf + rt->recvbuf_pos, rt->recvbuf_len - rt->recvbuf_pos);
    2138           0 :             if (ret >= 0) {
    2139           0 :                 rt->recvbuf_pos += ret;
    2140           0 :                 ret = rt->recvbuf_pos < rt->recvbuf_len;
    2141             :             }
    2142             :         } else
    2143           0 :             ret = -1;
    2144           0 :         if (ret == 0) {
    2145           0 :             rt->cur_transport_priv = NULL;
    2146           0 :             return 0;
    2147           0 :         } else if (ret == 1) {
    2148           0 :             return 0;
    2149             :         } else
    2150           0 :             rt->cur_transport_priv = NULL;
    2151             :     }
    2152             : 
    2153           0 : redo:
    2154           0 :     if (rt->transport == RTSP_TRANSPORT_RTP) {
    2155             :         int i;
    2156           0 :         int64_t first_queue_time = 0;
    2157           0 :         for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2158           0 :             RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
    2159             :             int64_t queue_time;
    2160           0 :             if (!rtpctx)
    2161           0 :                 continue;
    2162           0 :             queue_time = ff_rtp_queued_packet_time(rtpctx);
    2163           0 :             if (queue_time && (queue_time - first_queue_time < 0 ||
    2164             :                                !first_queue_time)) {
    2165           0 :                 first_queue_time = queue_time;
    2166           0 :                 first_queue_st   = rt->rtsp_streams[i];
    2167             :             }
    2168             :         }
    2169           0 :         if (first_queue_time) {
    2170           0 :             wait_end = first_queue_time + s->max_delay;
    2171             :         } else {
    2172           0 :             wait_end = 0;
    2173           0 :             first_queue_st = NULL;
    2174             :         }
    2175             :     }
    2176             : 
    2177             :     /* read next RTP packet */
    2178           0 :     if (!rt->recvbuf) {
    2179           0 :         rt->recvbuf = av_malloc(RECVBUF_SIZE);
    2180           0 :         if (!rt->recvbuf)
    2181           0 :             return AVERROR(ENOMEM);
    2182             :     }
    2183             : 
    2184           0 :     len = read_packet(s, &rtsp_st, first_queue_st, wait_end);
    2185           0 :     if (len == AVERROR(EAGAIN) && first_queue_st &&
    2186           0 :         rt->transport == RTSP_TRANSPORT_RTP) {
    2187           0 :         av_log(s, AV_LOG_WARNING,
    2188             :                 "max delay reached. need to consume packet\n");
    2189           0 :         rtsp_st = first_queue_st;
    2190           0 :         ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
    2191           0 :         goto end;
    2192             :     }
    2193           0 :     if (len < 0)
    2194           0 :         return len;
    2195             : 
    2196           0 :     if (rt->transport == RTSP_TRANSPORT_RDT) {
    2197           0 :         ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
    2198           0 :     } else if (rt->transport == RTSP_TRANSPORT_RTP) {
    2199           0 :         ret = ff_rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
    2200           0 :         if (rtsp_st->feedback) {
    2201           0 :             AVIOContext *pb = NULL;
    2202           0 :             if (rt->lower_transport == RTSP_LOWER_TRANSPORT_CUSTOM)
    2203           0 :                 pb = s->pb;
    2204           0 :             ff_rtp_send_rtcp_feedback(rtsp_st->transport_priv, rtsp_st->rtp_handle, pb);
    2205             :         }
    2206           0 :         if (ret < 0) {
    2207             :             /* Either bad packet, or a RTCP packet. Check if the
    2208             :              * first_rtcp_ntp_time field was initialized. */
    2209           0 :             RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
    2210           0 :             if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
    2211             :                 /* first_rtcp_ntp_time has been initialized for this stream,
    2212             :                  * copy the same value to all other uninitialized streams,
    2213             :                  * in order to map their timestamp origin to the same ntp time
    2214             :                  * as this one. */
    2215             :                 int i;
    2216           0 :                 AVStream *st = NULL;
    2217           0 :                 if (rtsp_st->stream_index >= 0)
    2218           0 :                     st = s->streams[rtsp_st->stream_index];
    2219           0 :                 for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2220           0 :                     RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
    2221           0 :                     AVStream *st2 = NULL;
    2222           0 :                     if (rt->rtsp_streams[i]->stream_index >= 0)
    2223           0 :                         st2 = s->streams[rt->rtsp_streams[i]->stream_index];
    2224           0 :                     if (rtpctx2 && st && st2 &&
    2225           0 :                         rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
    2226           0 :                         rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
    2227           0 :                         rtpctx2->rtcp_ts_offset = av_rescale_q(
    2228             :                             rtpctx->rtcp_ts_offset, st->time_base,
    2229             :                             st2->time_base);
    2230             :                     }
    2231             :                 }
    2232             :                 // Make real NTP start time available in AVFormatContext
    2233           0 :                 if (s->start_time_realtime == AV_NOPTS_VALUE) {
    2234           0 :                     s->start_time_realtime = av_rescale (rtpctx->first_rtcp_ntp_time - (NTP_OFFSET << 32), 1000000, 1LL << 32);
    2235           0 :                     if (rtpctx->st) {
    2236           0 :                         s->start_time_realtime -=
    2237           0 :                             av_rescale (rtpctx->rtcp_ts_offset,
    2238           0 :                                         (uint64_t) rtpctx->st->time_base.num * 1000000,
    2239           0 :                                                    rtpctx->st->time_base.den);
    2240             :                     }
    2241             :                 }
    2242             :             }
    2243           0 :             if (ret == -RTCP_BYE) {
    2244           0 :                 rt->nb_byes++;
    2245             : 
    2246           0 :                 av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
    2247           0 :                        rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
    2248             : 
    2249           0 :                 if (rt->nb_byes == rt->nb_rtsp_streams)
    2250           0 :                     return AVERROR_EOF;
    2251             :             }
    2252             :         }
    2253           0 :     } else if (CONFIG_RTPDEC && rt->ts) {
    2254           0 :         ret = avpriv_mpegts_parse_packet(rt->ts, pkt, rt->recvbuf, len);
    2255           0 :         if (ret >= 0) {
    2256           0 :             if (ret < len) {
    2257           0 :                 rt->recvbuf_len = len;
    2258           0 :                 rt->recvbuf_pos = ret;
    2259           0 :                 rt->cur_transport_priv = rt->ts;
    2260           0 :                 return 1;
    2261             :             } else {
    2262           0 :                 ret = 0;
    2263             :             }
    2264             :         }
    2265             :     } else {
    2266           0 :         return AVERROR_INVALIDDATA;
    2267             :     }
    2268           0 : end:
    2269           0 :     if (ret < 0)
    2270           0 :         goto redo;
    2271           0 :     if (ret == 1)
    2272             :         /* more packets may follow, so we save the RTP context */
    2273           0 :         rt->cur_transport_priv = rtsp_st->transport_priv;
    2274             : 
    2275           0 :     return ret;
    2276             : }
    2277             : #endif /* CONFIG_RTPDEC */
    2278             : 
    2279             : #if CONFIG_SDP_DEMUXER
    2280        6217 : static int sdp_probe(AVProbeData *p1)
    2281             : {
    2282        6217 :     const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
    2283             : 
    2284             :     /* we look for a line beginning "c=IN IP" */
    2285      293922 :     while (p < p_end && *p != '\0') {
    2286      568620 :         if (sizeof("c=IN IP") - 1 < p_end - p &&
    2287      284291 :             av_strstart(p, "c=IN IP", NULL))
    2288           0 :             return AVPROBE_SCORE_EXTENSION;
    2289             : 
    2290      284329 :         while (p < p_end - 1 && *p != '\n') p++;
    2291      284329 :         if (++p >= p_end)
    2292        2841 :             break;
    2293      281488 :         if (*p == '\r')
    2294        2261 :             p++;
    2295             :     }
    2296        6217 :     return 0;
    2297             : }
    2298             : 
    2299           0 : static void append_source_addrs(char *buf, int size, const char *name,
    2300             :                                 int count, struct RTSPSource **addrs)
    2301             : {
    2302             :     int i;
    2303           0 :     if (!count)
    2304           0 :         return;
    2305           0 :     av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
    2306           0 :     for (i = 1; i < count; i++)
    2307           0 :         av_strlcatf(buf, size, ",%s", addrs[i]->addr);
    2308             : }
    2309             : 
    2310           0 : static int sdp_read_header(AVFormatContext *s)
    2311             : {
    2312           0 :     RTSPState *rt = s->priv_data;
    2313             :     RTSPStream *rtsp_st;
    2314             :     int size, i, err;
    2315             :     char *content;
    2316             :     char url[1024];
    2317             : 
    2318           0 :     if (!ff_network_init())
    2319           0 :         return AVERROR(EIO);
    2320             : 
    2321           0 :     if (s->max_delay < 0) /* Not set by the caller */
    2322           0 :         s->max_delay = DEFAULT_REORDERING_DELAY;
    2323           0 :     if (rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)
    2324           0 :         rt->lower_transport = RTSP_LOWER_TRANSPORT_CUSTOM;
    2325             : 
    2326             :     /* read the whole sdp file */
    2327             :     /* XXX: better loading */
    2328           0 :     content = av_malloc(SDP_MAX_SIZE);
    2329           0 :     if (!content)
    2330           0 :         return AVERROR(ENOMEM);
    2331           0 :     size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
    2332           0 :     if (size <= 0) {
    2333           0 :         av_free(content);
    2334           0 :         return AVERROR_INVALIDDATA;
    2335             :     }
    2336           0 :     content[size] ='\0';
    2337             : 
    2338           0 :     err = ff_sdp_parse(s, content);
    2339           0 :     av_freep(&content);
    2340           0 :     if (err) goto fail;
    2341             : 
    2342             :     /* open each RTP stream */
    2343           0 :     for (i = 0; i < rt->nb_rtsp_streams; i++) {
    2344             :         char namebuf[50];
    2345           0 :         rtsp_st = rt->rtsp_streams[i];
    2346             : 
    2347           0 :         if (!(rt->rtsp_flags & RTSP_FLAG_CUSTOM_IO)) {
    2348           0 :             AVDictionary *opts = map_to_opts(rt);
    2349             : 
    2350           0 :             err = getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip,
    2351             :                               sizeof(rtsp_st->sdp_ip),
    2352             :                               namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
    2353           0 :             if (err) {
    2354           0 :                 av_log(s, AV_LOG_ERROR, "getnameinfo: %s\n", gai_strerror(err));
    2355           0 :                 err = AVERROR(EIO);
    2356           0 :                 av_dict_free(&opts);
    2357           0 :                 goto fail;
    2358             :             }
    2359           0 :             ff_url_join(url, sizeof(url), "rtp", NULL,
    2360             :                         namebuf, rtsp_st->sdp_port,
    2361             :                         "?localport=%d&ttl=%d&connect=%d&write_to_source=%d",
    2362             :                         rtsp_st->sdp_port, rtsp_st->sdp_ttl,
    2363           0 :                         rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0,
    2364           0 :                         rt->rtsp_flags & RTSP_FLAG_RTCP_TO_SOURCE ? 1 : 0);
    2365             : 
    2366           0 :             append_source_addrs(url, sizeof(url), "sources",
    2367             :                                 rtsp_st->nb_include_source_addrs,
    2368             :                                 rtsp_st->include_source_addrs);
    2369           0 :             append_source_addrs(url, sizeof(url), "block",
    2370             :                                 rtsp_st->nb_exclude_source_addrs,
    2371             :                                 rtsp_st->exclude_source_addrs);
    2372           0 :             err = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ,
    2373           0 :                            &s->interrupt_callback, &opts, s->protocol_whitelist, s->protocol_blacklist, NULL);
    2374             : 
    2375           0 :             av_dict_free(&opts);
    2376             : 
    2377           0 :             if (err < 0) {
    2378           0 :                 err = AVERROR_INVALIDDATA;
    2379           0 :                 goto fail;
    2380             :             }
    2381             :         }
    2382           0 :         if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
    2383           0 :             goto fail;
    2384             :     }
    2385           0 :     return 0;
    2386           0 : fail:
    2387           0 :     ff_rtsp_close_streams(s);
    2388           0 :     ff_network_close();
    2389           0 :     return err;
    2390             : }
    2391             : 
    2392           0 : static int sdp_read_close(AVFormatContext *s)
    2393             : {
    2394           0 :     ff_rtsp_close_streams(s);
    2395           0 :     ff_network_close();
    2396           0 :     return 0;
    2397             : }
    2398             : 
    2399             : static const AVClass sdp_demuxer_class = {
    2400             :     .class_name     = "SDP demuxer",
    2401             :     .item_name      = av_default_item_name,
    2402             :     .option         = sdp_options,
    2403             :     .version        = LIBAVUTIL_VERSION_INT,
    2404             : };
    2405             : 
    2406             : AVInputFormat ff_sdp_demuxer = {
    2407             :     .name           = "sdp",
    2408             :     .long_name      = NULL_IF_CONFIG_SMALL("SDP"),
    2409             :     .priv_data_size = sizeof(RTSPState),
    2410             :     .read_probe     = sdp_probe,
    2411             :     .read_header    = sdp_read_header,
    2412             :     .read_packet    = ff_rtsp_fetch_packet,
    2413             :     .read_close     = sdp_read_close,
    2414             :     .priv_class     = &sdp_demuxer_class,
    2415             : };
    2416             : #endif /* CONFIG_SDP_DEMUXER */
    2417             : 
    2418             : #if CONFIG_RTP_DEMUXER
    2419        3254 : static int rtp_probe(AVProbeData *p)
    2420             : {
    2421        3254 :     if (av_strstart(p->filename, "rtp:", NULL))
    2422           0 :         return AVPROBE_SCORE_MAX;
    2423        3254 :     return 0;
    2424             : }
    2425             : 
    2426           0 : static int rtp_read_header(AVFormatContext *s)
    2427             : {
    2428             :     uint8_t recvbuf[RTP_MAX_PACKET_LENGTH];
    2429             :     char host[500], sdp[500];
    2430             :     int ret, port;
    2431           0 :     URLContext* in = NULL;
    2432             :     int payload_type;
    2433           0 :     AVCodecParameters *par = NULL;
    2434             :     struct sockaddr_storage addr;
    2435             :     AVIOContext pb;
    2436           0 :     socklen_t addrlen = sizeof(addr);
    2437           0 :     RTSPState *rt = s->priv_data;
    2438             : 
    2439           0 :     if (!ff_network_init())
    2440           0 :         return AVERROR(EIO);
    2441             : 
    2442           0 :     ret = ffurl_open_whitelist(&in, s->url, AVIO_FLAG_READ,
    2443           0 :                      &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL);
    2444           0 :     if (ret)
    2445           0 :         goto fail;
    2446             : 
    2447             :     while (1) {
    2448           0 :         ret = ffurl_read(in, recvbuf, sizeof(recvbuf));
    2449           0 :         if (ret == AVERROR(EAGAIN))
    2450           0 :             continue;
    2451           0 :         if (ret < 0)
    2452           0 :             goto fail;
    2453           0 :         if (ret < 12) {
    2454           0 :             av_log(s, AV_LOG_WARNING, "Received too short packet\n");
    2455           0 :             continue;
    2456             :         }
    2457             : 
    2458           0 :         if ((recvbuf[0] & 0xc0) != 0x80) {
    2459           0 :             av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
    2460             :                                       "received\n");
    2461           0 :             continue;
    2462             :         }
    2463             : 
    2464           0 :         if (RTP_PT_IS_RTCP(recvbuf[1]))
    2465           0 :             continue;
    2466             : 
    2467           0 :         payload_type = recvbuf[1] & 0x7f;
    2468           0 :         break;
    2469             :     }
    2470           0 :     getsockname(ffurl_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
    2471           0 :     ffurl_close(in);
    2472           0 :     in = NULL;
    2473             : 
    2474           0 :     par = avcodec_parameters_alloc();
    2475           0 :     if (!par) {
    2476           0 :         ret = AVERROR(ENOMEM);
    2477           0 :         goto fail;
    2478             :     }
    2479             : 
    2480           0 :     if (ff_rtp_get_codec_info(par, payload_type)) {
    2481           0 :         av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
    2482             :                                 "without an SDP file describing it\n",
    2483             :                                  payload_type);
    2484           0 :         goto fail;
    2485             :     }
    2486           0 :     if (par->codec_type != AVMEDIA_TYPE_DATA) {
    2487           0 :         av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
    2488             :                                   "properly you need an SDP file "
    2489             :                                   "describing it\n");
    2490             :     }
    2491             : 
    2492           0 :     av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
    2493           0 :                  NULL, 0, s->url);
    2494             : 
    2495           0 :     snprintf(sdp, sizeof(sdp),
    2496             :              "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
    2497           0 :              addr.ss_family == AF_INET ? 4 : 6, host,
    2498           0 :              par->codec_type == AVMEDIA_TYPE_DATA  ? "application" :
    2499           0 :              par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
    2500             :              port, payload_type);
    2501           0 :     av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
    2502           0 :     avcodec_parameters_free(&par);
    2503             : 
    2504           0 :     ffio_init_context(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
    2505           0 :     s->pb = &pb;
    2506             : 
    2507             :     /* sdp_read_header initializes this again */
    2508           0 :     ff_network_close();
    2509             : 
    2510           0 :     rt->media_type_mask = (1 << (AVMEDIA_TYPE_SUBTITLE+1)) - 1;
    2511             : 
    2512           0 :     ret = sdp_read_header(s);
    2513           0 :     s->pb = NULL;
    2514           0 :     return ret;
    2515             : 
    2516           0 : fail:
    2517           0 :     avcodec_parameters_free(&par);
    2518           0 :     if (in)
    2519           0 :         ffurl_close(in);
    2520           0 :     ff_network_close();
    2521           0 :     return ret;
    2522             : }
    2523             : 
    2524             : static const AVClass rtp_demuxer_class = {
    2525             :     .class_name     = "RTP demuxer",
    2526             :     .item_name      = av_default_item_name,
    2527             :     .option         = rtp_options,
    2528             :     .version        = LIBAVUTIL_VERSION_INT,
    2529             : };
    2530             : 
    2531             : AVInputFormat ff_rtp_demuxer = {
    2532             :     .name           = "rtp",
    2533             :     .long_name      = NULL_IF_CONFIG_SMALL("RTP input"),
    2534             :     .priv_data_size = sizeof(RTSPState),
    2535             :     .read_probe     = rtp_probe,
    2536             :     .read_header    = rtp_read_header,
    2537             :     .read_packet    = ff_rtsp_fetch_packet,
    2538             :     .read_close     = sdp_read_close,
    2539             :     .flags          = AVFMT_NOFILE,
    2540             :     .priv_class     = &rtp_demuxer_class,
    2541             : };
    2542             : #endif /* CONFIG_RTP_DEMUXER */

Generated by: LCOV version 1.13