| 1 | /* |
| 2 | * RTSP demuxer |
| 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/avstring.h" |
| 23 | #include "libavutil/intreadwrite.h" |
| 24 | #include "libavutil/mathematics.h" |
| 25 | #include "libavutil/random_seed.h" |
| 26 | #include "libavutil/time.h" |
| 27 | #include "avformat.h" |
| 28 | |
| 29 | #include "internal.h" |
| 30 | #include "network.h" |
| 31 | #include "os_support.h" |
| 32 | #include "rtpproto.h" |
| 33 | #include "rtsp.h" |
| 34 | #include "rdt.h" |
| 35 | #include "url.h" |
| 36 | |
| 37 | static const struct RTSPStatusMessage { |
| 38 | enum RTSPStatusCode code; |
| 39 | const char *message; |
| 40 | } status_messages[] = { |
| 41 | { RTSP_STATUS_OK, "OK" }, |
| 42 | { RTSP_STATUS_METHOD, "Method Not Allowed" }, |
| 43 | { RTSP_STATUS_BANDWIDTH, "Not Enough Bandwidth" }, |
| 44 | { RTSP_STATUS_SESSION, "Session Not Found" }, |
| 45 | { RTSP_STATUS_STATE, "Method Not Valid in This State" }, |
| 46 | { RTSP_STATUS_AGGREGATE, "Aggregate operation not allowed" }, |
| 47 | { RTSP_STATUS_ONLY_AGGREGATE, "Only aggregate operation allowed" }, |
| 48 | { RTSP_STATUS_TRANSPORT, "Unsupported transport" }, |
| 49 | { RTSP_STATUS_INTERNAL, "Internal Server Error" }, |
| 50 | { RTSP_STATUS_SERVICE, "Service Unavailable" }, |
| 51 | { RTSP_STATUS_VERSION, "RTSP Version not supported" }, |
| 52 | { 0, "NULL" } |
| 53 | }; |
| 54 | |
| 55 | static int rtsp_read_close(AVFormatContext *s) |
| 56 | { |
| 57 | RTSPState *rt = s->priv_data; |
| 58 | |
| 59 | if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) |
| 60 | ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL); |
| 61 | |
| 62 | ff_rtsp_close_streams(s); |
| 63 | ff_rtsp_close_connections(s); |
| 64 | ff_network_close(); |
| 65 | rt->real_setup = NULL; |
| 66 | av_freep(&rt->real_setup_cache); |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | static inline int read_line(AVFormatContext *s, char *rbuf, const int rbufsize, |
| 71 | int *rbuflen) |
| 72 | { |
| 73 | RTSPState *rt = s->priv_data; |
| 74 | int idx = 0; |
| 75 | int ret = 0; |
| 76 | *rbuflen = 0; |
| 77 | |
| 78 | do { |
| 79 | ret = ffurl_read_complete(rt->rtsp_hd, rbuf + idx, 1); |
| 80 | if (ret <= 0) |
| 81 | return ret ? ret : AVERROR_EOF; |
| 82 | if (rbuf[idx] == '\r') { |
| 83 | /* Ignore */ |
| 84 | } else if (rbuf[idx] == '\n') { |
| 85 | rbuf[idx] = '\0'; |
| 86 | *rbuflen = idx; |
| 87 | return 0; |
| 88 | } else |
| 89 | idx++; |
| 90 | } while (idx < rbufsize); |
| 91 | av_log(s, AV_LOG_ERROR, "Message too long\n"); |
| 92 | return AVERROR(EIO); |
| 93 | } |
| 94 | |
| 95 | static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code, |
| 96 | const char *extracontent, uint16_t seq) |
| 97 | { |
| 98 | RTSPState *rt = s->priv_data; |
| 99 | char message[4096]; |
| 100 | int index = 0; |
| 101 | while (status_messages[index].code) { |
| 102 | if (status_messages[index].code == code) { |
| 103 | snprintf(message, sizeof(message), "RTSP/1.0 %d %s\r\n", |
| 104 | code, status_messages[index].message); |
| 105 | break; |
| 106 | } |
| 107 | index++; |
| 108 | } |
| 109 | if (!status_messages[index].code) |
| 110 | return AVERROR(EINVAL); |
| 111 | av_strlcatf(message, sizeof(message), "CSeq: %d\r\n", seq); |
| 112 | av_strlcatf(message, sizeof(message), "Server: %s\r\n", LIBAVFORMAT_IDENT); |
| 113 | if (extracontent) |
| 114 | av_strlcat(message, extracontent, sizeof(message)); |
| 115 | av_strlcat(message, "\r\n", sizeof(message)); |
| 116 | av_dlog(s, "Sending response:\n%s", message); |
| 117 | ffurl_write(rt->rtsp_hd, message, strlen(message)); |
| 118 | |
| 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | static inline int check_sessionid(AVFormatContext *s, |
| 123 | RTSPMessageHeader *request) |
| 124 | { |
| 125 | RTSPState *rt = s->priv_data; |
| 126 | unsigned char *session_id = rt->session_id; |
| 127 | if (!session_id[0]) { |
| 128 | av_log(s, AV_LOG_WARNING, "There is no session-id at the moment\n"); |
| 129 | return 0; |
| 130 | } |
| 131 | if (strcmp(session_id, request->session_id)) { |
| 132 | av_log(s, AV_LOG_ERROR, "Unexpected session-id %s\n", |
| 133 | request->session_id); |
| 134 | rtsp_send_reply(s, RTSP_STATUS_SESSION, NULL, request->seq); |
| 135 | return AVERROR_STREAM_NOT_FOUND; |
| 136 | } |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | static inline int rtsp_read_request(AVFormatContext *s, |
| 141 | RTSPMessageHeader *request, |
| 142 | const char *method) |
| 143 | { |
| 144 | RTSPState *rt = s->priv_data; |
| 145 | char rbuf[1024]; |
| 146 | int rbuflen, ret; |
| 147 | do { |
| 148 | ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); |
| 149 | if (ret) |
| 150 | return ret; |
| 151 | if (rbuflen > 1) { |
| 152 | av_dlog(s, "Parsing[%d]: %s\n", rbuflen, rbuf); |
| 153 | ff_rtsp_parse_line(request, rbuf, rt, method); |
| 154 | } |
| 155 | } while (rbuflen > 0); |
| 156 | if (request->seq != rt->seq + 1) { |
| 157 | av_log(s, AV_LOG_ERROR, "Unexpected Sequence number %d\n", |
| 158 | request->seq); |
| 159 | return AVERROR(EINVAL); |
| 160 | } |
| 161 | if (rt->session_id[0] && strcmp(method, "OPTIONS")) { |
| 162 | ret = check_sessionid(s, request); |
| 163 | if (ret) |
| 164 | return ret; |
| 165 | } |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | static int rtsp_read_announce(AVFormatContext *s) |
| 171 | { |
| 172 | RTSPState *rt = s->priv_data; |
| 173 | RTSPMessageHeader request = { 0 }; |
| 174 | char sdp[4096]; |
| 175 | int ret; |
| 176 | |
| 177 | ret = rtsp_read_request(s, &request, "ANNOUNCE"); |
| 178 | if (ret) |
| 179 | return ret; |
| 180 | rt->seq++; |
| 181 | if (strcmp(request.content_type, "application/sdp")) { |
| 182 | av_log(s, AV_LOG_ERROR, "Unexpected content type %s\n", |
| 183 | request.content_type); |
| 184 | rtsp_send_reply(s, RTSP_STATUS_SERVICE, NULL, request.seq); |
| 185 | return AVERROR_OPTION_NOT_FOUND; |
| 186 | } |
| 187 | if (request.content_length && request.content_length < sizeof(sdp) - 1) { |
| 188 | /* Read SDP */ |
| 189 | if (ffurl_read_complete(rt->rtsp_hd, sdp, request.content_length) |
| 190 | < request.content_length) { |
| 191 | av_log(s, AV_LOG_ERROR, |
| 192 | "Unable to get complete SDP Description in ANNOUNCE\n"); |
| 193 | rtsp_send_reply(s, RTSP_STATUS_INTERNAL, NULL, request.seq); |
| 194 | return AVERROR(EIO); |
| 195 | } |
| 196 | sdp[request.content_length] = '\0'; |
| 197 | av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp); |
| 198 | ret = ff_sdp_parse(s, sdp); |
| 199 | if (ret) |
| 200 | return ret; |
| 201 | rtsp_send_reply(s, RTSP_STATUS_OK, NULL, request.seq); |
| 202 | return 0; |
| 203 | } |
| 204 | av_log(s, AV_LOG_ERROR, |
| 205 | "Content-Length header value exceeds sdp allocated buffer (4KB)\n"); |
| 206 | rtsp_send_reply(s, RTSP_STATUS_INTERNAL, |
| 207 | "Content-Length exceeds buffer size", request.seq); |
| 208 | return AVERROR(EIO); |
| 209 | } |
| 210 | |
| 211 | static int rtsp_read_options(AVFormatContext *s) |
| 212 | { |
| 213 | RTSPState *rt = s->priv_data; |
| 214 | RTSPMessageHeader request = { 0 }; |
| 215 | int ret = 0; |
| 216 | |
| 217 | /* Parsing headers */ |
| 218 | ret = rtsp_read_request(s, &request, "OPTIONS"); |
| 219 | if (ret) |
| 220 | return ret; |
| 221 | rt->seq++; |
| 222 | /* Send Reply */ |
| 223 | rtsp_send_reply(s, RTSP_STATUS_OK, |
| 224 | "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD\r\n", |
| 225 | request.seq); |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl) |
| 230 | { |
| 231 | RTSPState *rt = s->priv_data; |
| 232 | RTSPMessageHeader request = { 0 }; |
| 233 | int ret = 0; |
| 234 | char url[1024]; |
| 235 | RTSPStream *rtsp_st; |
| 236 | char responseheaders[1024]; |
| 237 | int localport = -1; |
| 238 | int transportidx = 0; |
| 239 | int streamid = 0; |
| 240 | |
| 241 | ret = rtsp_read_request(s, &request, "SETUP"); |
| 242 | if (ret) |
| 243 | return ret; |
| 244 | rt->seq++; |
| 245 | if (!request.nb_transports) { |
| 246 | av_log(s, AV_LOG_ERROR, "No transport defined in SETUP\n"); |
| 247 | return AVERROR_INVALIDDATA; |
| 248 | } |
| 249 | for (transportidx = 0; transportidx < request.nb_transports; |
| 250 | transportidx++) { |
| 251 | if (!request.transports[transportidx].mode_record || |
| 252 | (request.transports[transportidx].lower_transport != |
| 253 | RTSP_LOWER_TRANSPORT_UDP && |
| 254 | request.transports[transportidx].lower_transport != |
| 255 | RTSP_LOWER_TRANSPORT_TCP)) { |
| 256 | av_log(s, AV_LOG_ERROR, "mode=record/receive not set or transport" |
| 257 | " protocol not supported (yet)\n"); |
| 258 | return AVERROR_INVALIDDATA; |
| 259 | } |
| 260 | } |
| 261 | if (request.nb_transports > 1) |
| 262 | av_log(s, AV_LOG_WARNING, "More than one transport not supported, " |
| 263 | "using first of all\n"); |
| 264 | for (streamid = 0; streamid < rt->nb_rtsp_streams; streamid++) { |
| 265 | if (!strcmp(rt->rtsp_streams[streamid]->control_url, |
| 266 | controlurl)) |
| 267 | break; |
| 268 | } |
| 269 | if (streamid == rt->nb_rtsp_streams) { |
| 270 | av_log(s, AV_LOG_ERROR, "Unable to find requested track\n"); |
| 271 | return AVERROR_STREAM_NOT_FOUND; |
| 272 | } |
| 273 | rtsp_st = rt->rtsp_streams[streamid]; |
| 274 | localport = rt->rtp_port_min; |
| 275 | |
| 276 | if (request.transports[0].lower_transport == RTSP_LOWER_TRANSPORT_TCP) { |
| 277 | rt->lower_transport = RTSP_LOWER_TRANSPORT_TCP; |
| 278 | if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { |
| 279 | rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); |
| 280 | return ret; |
| 281 | } |
| 282 | rtsp_st->interleaved_min = request.transports[0].interleaved_min; |
| 283 | rtsp_st->interleaved_max = request.transports[0].interleaved_max; |
| 284 | snprintf(responseheaders, sizeof(responseheaders), "Transport: " |
| 285 | "RTP/AVP/TCP;unicast;mode=receive;interleaved=%d-%d" |
| 286 | "\r\n", request.transports[0].interleaved_min, |
| 287 | request.transports[0].interleaved_max); |
| 288 | } else { |
| 289 | do { |
| 290 | ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL); |
| 291 | av_dlog(s, "Opening: %s", url); |
| 292 | ret = ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE, |
| 293 | &s->interrupt_callback, NULL); |
| 294 | if (ret) |
| 295 | localport += 2; |
| 296 | } while (ret || localport > rt->rtp_port_max); |
| 297 | if (localport > rt->rtp_port_max) { |
| 298 | rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); |
| 299 | return ret; |
| 300 | } |
| 301 | |
| 302 | av_dlog(s, "Listening on: %d", |
| 303 | ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle)); |
| 304 | if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { |
| 305 | rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); |
| 306 | return ret; |
| 307 | } |
| 308 | |
| 309 | localport = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle); |
| 310 | snprintf(responseheaders, sizeof(responseheaders), "Transport: " |
| 311 | "RTP/AVP/UDP;unicast;mode=receive;source=%s;" |
| 312 | "client_port=%d-%d;server_port=%d-%d\r\n", |
| 313 | host, request.transports[0].client_port_min, |
| 314 | request.transports[0].client_port_max, localport, |
| 315 | localport + 1); |
| 316 | } |
| 317 | |
| 318 | /* Establish sessionid if not previously set */ |
| 319 | /* Put this in a function? */ |
| 320 | /* RFC 2326: session id must be at least 8 digits */ |
| 321 | while (strlen(rt->session_id) < 8) |
| 322 | av_strlcatf(rt->session_id, 512, "%u", av_get_random_seed()); |
| 323 | |
| 324 | av_strlcatf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", |
| 325 | rt->session_id); |
| 326 | /* Send Reply */ |
| 327 | rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); |
| 328 | |
| 329 | rt->state = RTSP_STATE_PAUSED; |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | static int rtsp_read_record(AVFormatContext *s) |
| 334 | { |
| 335 | RTSPState *rt = s->priv_data; |
| 336 | RTSPMessageHeader request = { 0 }; |
| 337 | int ret = 0; |
| 338 | char responseheaders[1024]; |
| 339 | |
| 340 | ret = rtsp_read_request(s, &request, "RECORD"); |
| 341 | if (ret) |
| 342 | return ret; |
| 343 | ret = check_sessionid(s, &request); |
| 344 | if (ret) |
| 345 | return ret; |
| 346 | rt->seq++; |
| 347 | snprintf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", |
| 348 | rt->session_id); |
| 349 | rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); |
| 350 | |
| 351 | rt->state = RTSP_STATE_STREAMING; |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | static inline int parse_command_line(AVFormatContext *s, const char *line, |
| 356 | int linelen, char *uri, int urisize, |
| 357 | char *method, int methodsize, |
| 358 | enum RTSPMethod *methodcode) |
| 359 | { |
| 360 | RTSPState *rt = s->priv_data; |
| 361 | const char *linept, *searchlinept; |
| 362 | linept = strchr(line, ' '); |
| 363 | |
| 364 | if (!linept) { |
| 365 | av_log(s, AV_LOG_ERROR, "Error parsing method string\n"); |
| 366 | return AVERROR_INVALIDDATA; |
| 367 | } |
| 368 | |
| 369 | if (linept - line > methodsize - 1) { |
| 370 | av_log(s, AV_LOG_ERROR, "Method string too long\n"); |
| 371 | return AVERROR(EIO); |
| 372 | } |
| 373 | memcpy(method, line, linept - line); |
| 374 | method[linept - line] = '\0'; |
| 375 | linept++; |
| 376 | if (!strcmp(method, "ANNOUNCE")) |
| 377 | *methodcode = ANNOUNCE; |
| 378 | else if (!strcmp(method, "OPTIONS")) |
| 379 | *methodcode = OPTIONS; |
| 380 | else if (!strcmp(method, "RECORD")) |
| 381 | *methodcode = RECORD; |
| 382 | else if (!strcmp(method, "SETUP")) |
| 383 | *methodcode = SETUP; |
| 384 | else if (!strcmp(method, "PAUSE")) |
| 385 | *methodcode = PAUSE; |
| 386 | else if (!strcmp(method, "TEARDOWN")) |
| 387 | *methodcode = TEARDOWN; |
| 388 | else |
| 389 | *methodcode = UNKNOWN; |
| 390 | /* Check method with the state */ |
| 391 | if (rt->state == RTSP_STATE_IDLE) { |
| 392 | if ((*methodcode != ANNOUNCE) && (*methodcode != OPTIONS)) { |
| 393 | av_log(s, AV_LOG_ERROR, "Unexpected command in Idle State %s\n", |
| 394 | line); |
| 395 | return AVERROR_PROTOCOL_NOT_FOUND; |
| 396 | } |
| 397 | } else if (rt->state == RTSP_STATE_PAUSED) { |
| 398 | if ((*methodcode != OPTIONS) && (*methodcode != RECORD) |
| 399 | && (*methodcode != SETUP)) { |
| 400 | av_log(s, AV_LOG_ERROR, "Unexpected command in Paused State %s\n", |
| 401 | line); |
| 402 | return AVERROR_PROTOCOL_NOT_FOUND; |
| 403 | } |
| 404 | } else if (rt->state == RTSP_STATE_STREAMING) { |
| 405 | if ((*methodcode != PAUSE) && (*methodcode != OPTIONS) |
| 406 | && (*methodcode != TEARDOWN)) { |
| 407 | av_log(s, AV_LOG_ERROR, "Unexpected command in Streaming State" |
| 408 | " %s\n", line); |
| 409 | return AVERROR_PROTOCOL_NOT_FOUND; |
| 410 | } |
| 411 | } else { |
| 412 | av_log(s, AV_LOG_ERROR, "Unexpected State [%d]\n", rt->state); |
| 413 | return AVERROR_BUG; |
| 414 | } |
| 415 | |
| 416 | searchlinept = strchr(linept, ' '); |
| 417 | if (!searchlinept) { |
| 418 | av_log(s, AV_LOG_ERROR, "Error parsing message URI\n"); |
| 419 | return AVERROR_INVALIDDATA; |
| 420 | } |
| 421 | if (searchlinept - linept > urisize - 1) { |
| 422 | av_log(s, AV_LOG_ERROR, "uri string length exceeded buffer size\n"); |
| 423 | return AVERROR(EIO); |
| 424 | } |
| 425 | memcpy(uri, linept, searchlinept - linept); |
| 426 | uri[searchlinept - linept] = '\0'; |
| 427 | if (strcmp(rt->control_uri, uri)) { |
| 428 | char host[128], path[512], auth[128]; |
| 429 | int port; |
| 430 | char ctl_host[128], ctl_path[512], ctl_auth[128]; |
| 431 | int ctl_port; |
| 432 | av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port, |
| 433 | path, sizeof(path), uri); |
| 434 | av_url_split(NULL, 0, ctl_auth, sizeof(ctl_auth), ctl_host, |
| 435 | sizeof(ctl_host), &ctl_port, ctl_path, sizeof(ctl_path), |
| 436 | rt->control_uri); |
| 437 | if (strcmp(host, ctl_host)) |
| 438 | av_log(s, AV_LOG_INFO, "Host %s differs from expected %s\n", |
| 439 | host, ctl_host); |
| 440 | if (strcmp(path, ctl_path) && *methodcode != SETUP) |
| 441 | av_log(s, AV_LOG_WARNING, "WARNING: Path %s differs from expected" |
| 442 | " %s\n", path, ctl_path); |
| 443 | if (*methodcode == ANNOUNCE) { |
| 444 | av_log(s, AV_LOG_INFO, |
| 445 | "Updating control URI to %s\n", uri); |
| 446 | av_strlcpy(rt->control_uri, uri, sizeof(rt->control_uri)); |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | linept = searchlinept + 1; |
| 451 | if (!av_strstart(linept, "RTSP/1.0", NULL)) { |
| 452 | av_log(s, AV_LOG_ERROR, "Error parsing protocol or version\n"); |
| 453 | return AVERROR_PROTOCOL_NOT_FOUND; |
| 454 | } |
| 455 | return 0; |
| 456 | } |
| 457 | |
| 458 | int ff_rtsp_parse_streaming_commands(AVFormatContext *s) |
| 459 | { |
| 460 | RTSPState *rt = s->priv_data; |
| 461 | unsigned char rbuf[4096]; |
| 462 | unsigned char method[10]; |
| 463 | char uri[500]; |
| 464 | int ret; |
| 465 | int rbuflen = 0; |
| 466 | RTSPMessageHeader request = { 0 }; |
| 467 | enum RTSPMethod methodcode; |
| 468 | |
| 469 | ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); |
| 470 | if (ret < 0) |
| 471 | return ret; |
| 472 | ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method, |
| 473 | sizeof(method), &methodcode); |
| 474 | if (ret) { |
| 475 | av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n"); |
| 476 | return ret; |
| 477 | } |
| 478 | |
| 479 | ret = rtsp_read_request(s, &request, method); |
| 480 | if (ret) |
| 481 | return ret; |
| 482 | rt->seq++; |
| 483 | if (methodcode == PAUSE) { |
| 484 | rt->state = RTSP_STATE_PAUSED; |
| 485 | ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq); |
| 486 | // TODO: Missing date header in response |
| 487 | } else if (methodcode == OPTIONS) { |
| 488 | ret = rtsp_send_reply(s, RTSP_STATUS_OK, |
| 489 | "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, " |
| 490 | "RECORD\r\n", request.seq); |
| 491 | } else if (methodcode == TEARDOWN) { |
| 492 | rt->state = RTSP_STATE_IDLE; |
| 493 | ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq); |
| 494 | return 0; |
| 495 | } |
| 496 | return ret; |
| 497 | } |
| 498 | |
| 499 | static int rtsp_read_play(AVFormatContext *s) |
| 500 | { |
| 501 | RTSPState *rt = s->priv_data; |
| 502 | RTSPMessageHeader reply1, *reply = &reply1; |
| 503 | int i; |
| 504 | char cmd[1024]; |
| 505 | |
| 506 | av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state); |
| 507 | rt->nb_byes = 0; |
| 508 | |
| 509 | if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { |
| 510 | if (rt->transport == RTSP_TRANSPORT_RTP) { |
| 511 | for (i = 0; i < rt->nb_rtsp_streams; i++) { |
| 512 | RTSPStream *rtsp_st = rt->rtsp_streams[i]; |
| 513 | RTPDemuxContext *rtpctx = rtsp_st->transport_priv; |
| 514 | if (!rtpctx) |
| 515 | continue; |
| 516 | ff_rtp_reset_packet_queue(rtpctx); |
| 517 | rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE; |
| 518 | rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE; |
| 519 | rtpctx->base_timestamp = 0; |
| 520 | rtpctx->timestamp = 0; |
| 521 | rtpctx->unwrapped_timestamp = 0; |
| 522 | rtpctx->rtcp_ts_offset = 0; |
| 523 | } |
| 524 | } |
| 525 | if (rt->state == RTSP_STATE_PAUSED) { |
| 526 | cmd[0] = 0; |
| 527 | } else { |
| 528 | snprintf(cmd, sizeof(cmd), |
| 529 | "Range: npt=%"PRId64".%03"PRId64"-\r\n", |
| 530 | rt->seek_timestamp / AV_TIME_BASE, |
| 531 | rt->seek_timestamp / (AV_TIME_BASE / 1000) % 1000); |
| 532 | } |
| 533 | ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL); |
| 534 | if (reply->status_code != RTSP_STATUS_OK) { |
| 535 | return ff_rtsp_averror(reply->status_code, -1); |
| 536 | } |
| 537 | if (rt->transport == RTSP_TRANSPORT_RTP && |
| 538 | reply->range_start != AV_NOPTS_VALUE) { |
| 539 | for (i = 0; i < rt->nb_rtsp_streams; i++) { |
| 540 | RTSPStream *rtsp_st = rt->rtsp_streams[i]; |
| 541 | RTPDemuxContext *rtpctx = rtsp_st->transport_priv; |
| 542 | AVStream *st = NULL; |
| 543 | if (!rtpctx || rtsp_st->stream_index < 0) |
| 544 | continue; |
| 545 | st = s->streams[rtsp_st->stream_index]; |
| 546 | rtpctx->range_start_offset = |
| 547 | av_rescale_q(reply->range_start, AV_TIME_BASE_Q, |
| 548 | st->time_base); |
| 549 | } |
| 550 | } |
| 551 | } |
| 552 | rt->state = RTSP_STATE_STREAMING; |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | /* pause the stream */ |
| 557 | static int rtsp_read_pause(AVFormatContext *s) |
| 558 | { |
| 559 | RTSPState *rt = s->priv_data; |
| 560 | RTSPMessageHeader reply1, *reply = &reply1; |
| 561 | |
| 562 | if (rt->state != RTSP_STATE_STREAMING) |
| 563 | return 0; |
| 564 | else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { |
| 565 | ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL); |
| 566 | if (reply->status_code != RTSP_STATUS_OK) { |
| 567 | return ff_rtsp_averror(reply->status_code, -1); |
| 568 | } |
| 569 | } |
| 570 | rt->state = RTSP_STATE_PAUSED; |
| 571 | return 0; |
| 572 | } |
| 573 | |
| 574 | int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply) |
| 575 | { |
| 576 | RTSPState *rt = s->priv_data; |
| 577 | char cmd[1024]; |
| 578 | unsigned char *content = NULL; |
| 579 | int ret; |
| 580 | |
| 581 | /* describe the stream */ |
| 582 | snprintf(cmd, sizeof(cmd), |
| 583 | "Accept: application/sdp\r\n"); |
| 584 | if (rt->server_type == RTSP_SERVER_REAL) { |
| 585 | /** |
| 586 | * The Require: attribute is needed for proper streaming from |
| 587 | * Realmedia servers. |
| 588 | */ |
| 589 | av_strlcat(cmd, |
| 590 | "Require: com.real.retain-entity-for-setup\r\n", |
| 591 | sizeof(cmd)); |
| 592 | } |
| 593 | ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content); |
| 594 | if (reply->status_code != RTSP_STATUS_OK) { |
| 595 | av_freep(&content); |
| 596 | return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA); |
| 597 | } |
| 598 | if (!content) |
| 599 | return AVERROR_INVALIDDATA; |
| 600 | |
| 601 | av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", content); |
| 602 | /* now we got the SDP description, we parse it */ |
| 603 | ret = ff_sdp_parse(s, (const char *)content); |
| 604 | av_freep(&content); |
| 605 | if (ret < 0) |
| 606 | return ret; |
| 607 | |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | static int rtsp_listen(AVFormatContext *s) |
| 612 | { |
| 613 | RTSPState *rt = s->priv_data; |
| 614 | char proto[128], host[128], path[512], auth[128]; |
| 615 | char uri[500]; |
| 616 | int port; |
| 617 | int default_port = RTSP_DEFAULT_PORT; |
| 618 | char tcpname[500]; |
| 619 | const char *lower_proto = "tcp"; |
| 620 | unsigned char rbuf[4096]; |
| 621 | unsigned char method[10]; |
| 622 | int rbuflen = 0; |
| 623 | int ret; |
| 624 | enum RTSPMethod methodcode; |
| 625 | |
| 626 | /* extract hostname and port */ |
| 627 | av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host), |
| 628 | &port, path, sizeof(path), s->filename); |
| 629 | |
| 630 | /* ff_url_join. No authorization by now (NULL) */ |
| 631 | ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host, |
| 632 | port, "%s", path); |
| 633 | |
| 634 | if (!strcmp(proto, "rtsps")) { |
| 635 | lower_proto = "tls"; |
| 636 | default_port = RTSPS_DEFAULT_PORT; |
| 637 | } |
| 638 | |
| 639 | if (port < 0) |
| 640 | port = default_port; |
| 641 | |
| 642 | /* Create TCP connection */ |
| 643 | ff_url_join(tcpname, sizeof(tcpname), lower_proto, NULL, host, port, |
| 644 | "?listen&listen_timeout=%d", rt->initial_timeout * 1000); |
| 645 | |
| 646 | if (ret = ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE, |
| 647 | &s->interrupt_callback, NULL)) { |
| 648 | av_log(s, AV_LOG_ERROR, "Unable to open RTSP for listening\n"); |
| 649 | return ret; |
| 650 | } |
| 651 | rt->state = RTSP_STATE_IDLE; |
| 652 | rt->rtsp_hd_out = rt->rtsp_hd; |
| 653 | for (;;) { /* Wait for incoming RTSP messages */ |
| 654 | ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); |
| 655 | if (ret < 0) |
| 656 | return ret; |
| 657 | ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method, |
| 658 | sizeof(method), &methodcode); |
| 659 | if (ret) { |
| 660 | av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n"); |
| 661 | return ret; |
| 662 | } |
| 663 | |
| 664 | if (methodcode == ANNOUNCE) { |
| 665 | ret = rtsp_read_announce(s); |
| 666 | rt->state = RTSP_STATE_PAUSED; |
| 667 | } else if (methodcode == OPTIONS) { |
| 668 | ret = rtsp_read_options(s); |
| 669 | } else if (methodcode == RECORD) { |
| 670 | ret = rtsp_read_record(s); |
| 671 | if (!ret) |
| 672 | return 0; // We are ready for streaming |
| 673 | } else if (methodcode == SETUP) |
| 674 | ret = rtsp_read_setup(s, host, uri); |
| 675 | if (ret) { |
| 676 | ffurl_close(rt->rtsp_hd); |
| 677 | return AVERROR_INVALIDDATA; |
| 678 | } |
| 679 | } |
| 680 | return 0; |
| 681 | } |
| 682 | |
| 683 | static int rtsp_probe(AVProbeData *p) |
| 684 | { |
| 685 | if ( |
| 686 | #if CONFIG_TLS_PROTOCOL |
| 687 | av_strstart(p->filename, "rtsps:", NULL) || |
| 688 | #endif |
| 689 | av_strstart(p->filename, "rtsp:", NULL)) |
| 690 | return AVPROBE_SCORE_MAX; |
| 691 | return 0; |
| 692 | } |
| 693 | |
| 694 | static int rtsp_read_header(AVFormatContext *s) |
| 695 | { |
| 696 | RTSPState *rt = s->priv_data; |
| 697 | int ret; |
| 698 | |
| 699 | if (rt->initial_timeout > 0) |
| 700 | rt->rtsp_flags |= RTSP_FLAG_LISTEN; |
| 701 | |
| 702 | if (rt->rtsp_flags & RTSP_FLAG_LISTEN) { |
| 703 | ret = rtsp_listen(s); |
| 704 | if (ret) |
| 705 | return ret; |
| 706 | } else { |
| 707 | ret = ff_rtsp_connect(s); |
| 708 | if (ret) |
| 709 | return ret; |
| 710 | |
| 711 | rt->real_setup_cache = !s->nb_streams ? NULL : |
| 712 | av_mallocz_array(s->nb_streams, 2 * sizeof(*rt->real_setup_cache)); |
| 713 | if (!rt->real_setup_cache && s->nb_streams) |
| 714 | return AVERROR(ENOMEM); |
| 715 | rt->real_setup = rt->real_setup_cache + s->nb_streams; |
| 716 | |
| 717 | if (rt->initial_pause) { |
| 718 | /* do not start immediately */ |
| 719 | } else { |
| 720 | if ((ret = rtsp_read_play(s)) < 0) { |
| 721 | ff_rtsp_close_streams(s); |
| 722 | ff_rtsp_close_connections(s); |
| 723 | return ret; |
| 724 | } |
| 725 | } |
| 726 | } |
| 727 | |
| 728 | return 0; |
| 729 | } |
| 730 | |
| 731 | int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, |
| 732 | uint8_t *buf, int buf_size) |
| 733 | { |
| 734 | RTSPState *rt = s->priv_data; |
| 735 | int id, len, i, ret; |
| 736 | RTSPStream *rtsp_st; |
| 737 | |
| 738 | av_dlog(s, "tcp_read_packet:\n"); |
| 739 | redo: |
| 740 | for (;;) { |
| 741 | RTSPMessageHeader reply; |
| 742 | |
| 743 | ret = ff_rtsp_read_reply(s, &reply, NULL, 1, NULL); |
| 744 | if (ret < 0) |
| 745 | return ret; |
| 746 | if (ret == 1) /* received '$' */ |
| 747 | break; |
| 748 | /* XXX: parse message */ |
| 749 | if (rt->state != RTSP_STATE_STREAMING) |
| 750 | return 0; |
| 751 | } |
| 752 | ret = ffurl_read_complete(rt->rtsp_hd, buf, 3); |
| 753 | if (ret != 3) |
| 754 | return -1; |
| 755 | id = buf[0]; |
| 756 | len = AV_RB16(buf + 1); |
| 757 | av_dlog(s, "id=%d len=%d\n", id, len); |
| 758 | if (len > buf_size || len < 8) |
| 759 | goto redo; |
| 760 | /* get the data */ |
| 761 | ret = ffurl_read_complete(rt->rtsp_hd, buf, len); |
| 762 | if (ret != len) |
| 763 | return -1; |
| 764 | if (rt->transport == RTSP_TRANSPORT_RDT && |
| 765 | ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0) |
| 766 | return -1; |
| 767 | |
| 768 | /* find the matching stream */ |
| 769 | for (i = 0; i < rt->nb_rtsp_streams; i++) { |
| 770 | rtsp_st = rt->rtsp_streams[i]; |
| 771 | if (id >= rtsp_st->interleaved_min && |
| 772 | id <= rtsp_st->interleaved_max) |
| 773 | goto found; |
| 774 | } |
| 775 | goto redo; |
| 776 | found: |
| 777 | *prtsp_st = rtsp_st; |
| 778 | return len; |
| 779 | } |
| 780 | |
| 781 | static int resetup_tcp(AVFormatContext *s) |
| 782 | { |
| 783 | RTSPState *rt = s->priv_data; |
| 784 | char host[1024]; |
| 785 | int port; |
| 786 | |
| 787 | av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0, |
| 788 | s->filename); |
| 789 | ff_rtsp_undo_setup(s, 0); |
| 790 | return ff_rtsp_make_setup_request(s, host, port, RTSP_LOWER_TRANSPORT_TCP, |
| 791 | rt->real_challenge); |
| 792 | } |
| 793 | |
| 794 | static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 795 | { |
| 796 | RTSPState *rt = s->priv_data; |
| 797 | int ret; |
| 798 | RTSPMessageHeader reply1, *reply = &reply1; |
| 799 | char cmd[1024]; |
| 800 | |
| 801 | retry: |
| 802 | if (rt->server_type == RTSP_SERVER_REAL) { |
| 803 | int i; |
| 804 | |
| 805 | for (i = 0; i < s->nb_streams; i++) |
| 806 | rt->real_setup[i] = s->streams[i]->discard; |
| 807 | |
| 808 | if (!rt->need_subscription) { |
| 809 | if (memcmp (rt->real_setup, rt->real_setup_cache, |
| 810 | sizeof(enum AVDiscard) * s->nb_streams)) { |
| 811 | snprintf(cmd, sizeof(cmd), |
| 812 | "Unsubscribe: %s\r\n", |
| 813 | rt->last_subscription); |
| 814 | ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, |
| 815 | cmd, reply, NULL); |
| 816 | if (reply->status_code != RTSP_STATUS_OK) |
| 817 | return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA); |
| 818 | rt->need_subscription = 1; |
| 819 | } |
| 820 | } |
| 821 | |
| 822 | if (rt->need_subscription) { |
| 823 | int r, rule_nr, first = 1; |
| 824 | |
| 825 | memcpy(rt->real_setup_cache, rt->real_setup, |
| 826 | sizeof(enum AVDiscard) * s->nb_streams); |
| 827 | rt->last_subscription[0] = 0; |
| 828 | |
| 829 | snprintf(cmd, sizeof(cmd), |
| 830 | "Subscribe: "); |
| 831 | for (i = 0; i < rt->nb_rtsp_streams; i++) { |
| 832 | rule_nr = 0; |
| 833 | for (r = 0; r < s->nb_streams; r++) { |
| 834 | if (s->streams[r]->id == i) { |
| 835 | if (s->streams[r]->discard != AVDISCARD_ALL) { |
| 836 | if (!first) |
| 837 | av_strlcat(rt->last_subscription, ",", |
| 838 | sizeof(rt->last_subscription)); |
| 839 | ff_rdt_subscribe_rule( |
| 840 | rt->last_subscription, |
| 841 | sizeof(rt->last_subscription), i, rule_nr); |
| 842 | first = 0; |
| 843 | } |
| 844 | rule_nr++; |
| 845 | } |
| 846 | } |
| 847 | } |
| 848 | av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription); |
| 849 | ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, |
| 850 | cmd, reply, NULL); |
| 851 | if (reply->status_code != RTSP_STATUS_OK) |
| 852 | return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA); |
| 853 | rt->need_subscription = 0; |
| 854 | |
| 855 | if (rt->state == RTSP_STATE_STREAMING) |
| 856 | rtsp_read_play (s); |
| 857 | } |
| 858 | } |
| 859 | |
| 860 | ret = ff_rtsp_fetch_packet(s, pkt); |
| 861 | if (ret < 0) { |
| 862 | if (ret == AVERROR(ETIMEDOUT) && !rt->packets) { |
| 863 | if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP && |
| 864 | rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) { |
| 865 | RTSPMessageHeader reply1, *reply = &reply1; |
| 866 | av_log(s, AV_LOG_WARNING, "UDP timeout, retrying with TCP\n"); |
| 867 | if (rtsp_read_pause(s) != 0) |
| 868 | return -1; |
| 869 | // TEARDOWN is required on Real-RTSP, but might make |
| 870 | // other servers close the connection. |
| 871 | if (rt->server_type == RTSP_SERVER_REAL) |
| 872 | ff_rtsp_send_cmd(s, "TEARDOWN", rt->control_uri, NULL, |
| 873 | reply, NULL); |
| 874 | rt->session_id[0] = '\0'; |
| 875 | if (resetup_tcp(s) == 0) { |
| 876 | rt->state = RTSP_STATE_IDLE; |
| 877 | rt->need_subscription = 1; |
| 878 | if (rtsp_read_play(s) != 0) |
| 879 | return -1; |
| 880 | goto retry; |
| 881 | } |
| 882 | } |
| 883 | } |
| 884 | return ret; |
| 885 | } |
| 886 | rt->packets++; |
| 887 | |
| 888 | if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) { |
| 889 | /* send dummy request to keep TCP connection alive */ |
| 890 | if ((av_gettime_relative() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2 || |
| 891 | rt->auth_state.stale) { |
| 892 | if (rt->server_type == RTSP_SERVER_WMS || |
| 893 | (rt->server_type != RTSP_SERVER_REAL && |
| 894 | rt->get_parameter_supported)) { |
| 895 | ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL); |
| 896 | } else { |
| 897 | ff_rtsp_send_cmd_async(s, "OPTIONS", rt->control_uri, NULL); |
| 898 | } |
| 899 | /* The stale flag should be reset when creating the auth response in |
| 900 | * ff_rtsp_send_cmd_async, but reset it here just in case we never |
| 901 | * called the auth code (if we didn't have any credentials set). */ |
| 902 | rt->auth_state.stale = 0; |
| 903 | } |
| 904 | } |
| 905 | |
| 906 | return 0; |
| 907 | } |
| 908 | |
| 909 | static int rtsp_read_seek(AVFormatContext *s, int stream_index, |
| 910 | int64_t timestamp, int flags) |
| 911 | { |
| 912 | RTSPState *rt = s->priv_data; |
| 913 | int ret; |
| 914 | |
| 915 | rt->seek_timestamp = av_rescale_q(timestamp, |
| 916 | s->streams[stream_index]->time_base, |
| 917 | AV_TIME_BASE_Q); |
| 918 | switch(rt->state) { |
| 919 | default: |
| 920 | case RTSP_STATE_IDLE: |
| 921 | break; |
| 922 | case RTSP_STATE_STREAMING: |
| 923 | if ((ret = rtsp_read_pause(s)) != 0) |
| 924 | return ret; |
| 925 | rt->state = RTSP_STATE_SEEKING; |
| 926 | if ((ret = rtsp_read_play(s)) != 0) |
| 927 | return ret; |
| 928 | break; |
| 929 | case RTSP_STATE_PAUSED: |
| 930 | rt->state = RTSP_STATE_IDLE; |
| 931 | break; |
| 932 | } |
| 933 | return 0; |
| 934 | } |
| 935 | |
| 936 | static const AVClass rtsp_demuxer_class = { |
| 937 | .class_name = "RTSP demuxer", |
| 938 | .item_name = av_default_item_name, |
| 939 | .option = ff_rtsp_options, |
| 940 | .version = LIBAVUTIL_VERSION_INT, |
| 941 | }; |
| 942 | |
| 943 | AVInputFormat ff_rtsp_demuxer = { |
| 944 | .name = "rtsp", |
| 945 | .long_name = NULL_IF_CONFIG_SMALL("RTSP input"), |
| 946 | .priv_data_size = sizeof(RTSPState), |
| 947 | .read_probe = rtsp_probe, |
| 948 | .read_header = rtsp_read_header, |
| 949 | .read_packet = rtsp_read_packet, |
| 950 | .read_close = rtsp_read_close, |
| 951 | .read_seek = rtsp_read_seek, |
| 952 | .flags = AVFMT_NOFILE, |
| 953 | .read_play = rtsp_read_play, |
| 954 | .read_pause = rtsp_read_pause, |
| 955 | .priv_class = &rtsp_demuxer_class, |
| 956 | }; |