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