| /* | |
| * RTSP demuxer | |
| * Copyright (c) 2002 Fabrice Bellard | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| #include "config_components.h" | |
| #include "libavutil/avstring.h" | |
| #include "libavutil/intreadwrite.h" | |
| #include "libavutil/mathematics.h" | |
| #include "libavutil/random_seed.h" | |
| #include "libavutil/time.h" | |
| #include "avformat.h" | |
| #include "demux.h" | |
| #include "internal.h" | |
| #include "network.h" | |
| #include "os_support.h" | |
| #include "rtpproto.h" | |
| #include "rtsp.h" | |
| #include "rdt.h" | |
| #include "tls.h" | |
| #include "url.h" | |
| #include "version.h" | |
| static const struct RTSPStatusMessage { | |
| enum RTSPStatusCode code; | |
| const char *message; | |
| } status_messages[] = { | |
| { RTSP_STATUS_OK, "OK" }, | |
| { RTSP_STATUS_METHOD, "Method Not Allowed" }, | |
| { RTSP_STATUS_BANDWIDTH, "Not Enough Bandwidth" }, | |
| { RTSP_STATUS_SESSION, "Session Not Found" }, | |
| { RTSP_STATUS_STATE, "Method Not Valid in This State" }, | |
| { RTSP_STATUS_AGGREGATE, "Aggregate operation not allowed" }, | |
| { RTSP_STATUS_ONLY_AGGREGATE, "Only aggregate operation allowed" }, | |
| { RTSP_STATUS_TRANSPORT, "Unsupported transport" }, | |
| { RTSP_STATUS_INTERNAL, "Internal Server Error" }, | |
| { RTSP_STATUS_SERVICE, "Service Unavailable" }, | |
| { RTSP_STATUS_VERSION, "RTSP Version not supported" }, | |
| { 0, "NULL" } | |
| }; | |
| static int rtsp_read_close(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) | |
| ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL); | |
| ff_rtsp_close_streams(s); | |
| ff_rtsp_close_connections(s); | |
| ff_network_close(); | |
| rt->real_setup = NULL; | |
| av_freep(&rt->real_setup_cache); | |
| return 0; | |
| } | |
| static inline int read_line(AVFormatContext *s, char *rbuf, const int rbufsize, | |
| int *rbuflen) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| int idx = 0; | |
| int ret = 0; | |
| *rbuflen = 0; | |
| do { | |
| ret = ffurl_read_complete(rt->rtsp_hd, rbuf + idx, 1); | |
| if (ret <= 0) | |
| return ret ? ret : AVERROR_EOF; | |
| if (rbuf[idx] == '\r') { | |
| /* Ignore */ | |
| } else if (rbuf[idx] == '\n') { | |
| rbuf[idx] = '\0'; | |
| *rbuflen = idx; | |
| return 0; | |
| } else | |
| idx++; | |
| } while (idx < rbufsize); | |
| av_log(s, AV_LOG_ERROR, "Message too long\n"); | |
| return AVERROR(EIO); | |
| } | |
| static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code, | |
| const char *extracontent, uint16_t seq) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| char message[MAX_URL_SIZE]; | |
| int index = 0; | |
| while (status_messages[index].code) { | |
| if (status_messages[index].code == code) { | |
| snprintf(message, sizeof(message), "RTSP/1.0 %d %s\r\n", | |
| code, status_messages[index].message); | |
| break; | |
| } | |
| index++; | |
| } | |
| if (!status_messages[index].code) | |
| return AVERROR(EINVAL); | |
| av_strlcatf(message, sizeof(message), "CSeq: %d\r\n", seq); | |
| av_strlcatf(message, sizeof(message), "Server: %s\r\n", LIBAVFORMAT_IDENT); | |
| if (extracontent) | |
| av_strlcat(message, extracontent, sizeof(message)); | |
| av_strlcat(message, "\r\n", sizeof(message)); | |
| av_log(s, AV_LOG_TRACE, "Sending response:\n%s", message); | |
| ffurl_write(rt->rtsp_hd_out, message, strlen(message)); | |
| return 0; | |
| } | |
| static inline int check_sessionid(AVFormatContext *s, | |
| RTSPMessageHeader *request) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| unsigned char *session_id = rt->session_id; | |
| if (!session_id[0]) { | |
| av_log(s, AV_LOG_WARNING, "There is no session-id at the moment\n"); | |
| return 0; | |
| } | |
| if (strcmp(session_id, request->session_id)) { | |
| av_log(s, AV_LOG_ERROR, "Unexpected session-id %s\n", | |
| request->session_id); | |
| rtsp_send_reply(s, RTSP_STATUS_SESSION, NULL, request->seq); | |
| return AVERROR_STREAM_NOT_FOUND; | |
| } | |
| return 0; | |
| } | |
| static inline int rtsp_read_request(AVFormatContext *s, | |
| RTSPMessageHeader *request, | |
| const char *method) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| char rbuf[MAX_URL_SIZE]; | |
| int rbuflen, ret; | |
| do { | |
| ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); | |
| if (ret) | |
| return ret; | |
| if (rbuflen > 1) { | |
| av_log(s, AV_LOG_TRACE, "Parsing[%d]: %s\n", rbuflen, rbuf); | |
| ff_rtsp_parse_line(s, request, rbuf, rt, method); | |
| } | |
| } while (rbuflen > 0); | |
| if (request->seq != rt->seq + 1) { | |
| av_log(s, AV_LOG_ERROR, "Unexpected Sequence number %d\n", | |
| request->seq); | |
| return AVERROR(EINVAL); | |
| } | |
| if (rt->session_id[0] && strcmp(method, "OPTIONS")) { | |
| ret = check_sessionid(s, request); | |
| if (ret) | |
| return ret; | |
| } | |
| return 0; | |
| } | |
| static int rtsp_read_announce(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| RTSPMessageHeader request = { 0 }; | |
| char *sdp; | |
| int ret; | |
| ret = rtsp_read_request(s, &request, "ANNOUNCE"); | |
| if (ret) | |
| return ret; | |
| rt->seq++; | |
| if (strcmp(request.content_type, "application/sdp")) { | |
| av_log(s, AV_LOG_ERROR, "Unexpected content type %s\n", | |
| request.content_type); | |
| rtsp_send_reply(s, RTSP_STATUS_SERVICE, NULL, request.seq); | |
| return AVERROR_OPTION_NOT_FOUND; | |
| } | |
| if (request.content_length) { | |
| sdp = av_malloc(request.content_length + 1); | |
| if (!sdp) | |
| return AVERROR(ENOMEM); | |
| /* Read SDP */ | |
| if (ffurl_read_complete(rt->rtsp_hd, sdp, request.content_length) | |
| < request.content_length) { | |
| av_log(s, AV_LOG_ERROR, | |
| "Unable to get complete SDP Description in ANNOUNCE\n"); | |
| rtsp_send_reply(s, RTSP_STATUS_INTERNAL, NULL, request.seq); | |
| av_free(sdp); | |
| return AVERROR(EIO); | |
| } | |
| sdp[request.content_length] = '\0'; | |
| av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp); | |
| ret = ff_sdp_parse(s, sdp); | |
| av_free(sdp); | |
| if (ret) | |
| return ret; | |
| rtsp_send_reply(s, RTSP_STATUS_OK, NULL, request.seq); | |
| return 0; | |
| } | |
| av_log(s, AV_LOG_ERROR, | |
| "Content-Length header value exceeds sdp allocated buffer (4KB)\n"); | |
| rtsp_send_reply(s, RTSP_STATUS_INTERNAL, | |
| "Content-Length exceeds buffer size", request.seq); | |
| return AVERROR(EIO); | |
| } | |
| static int rtsp_read_options(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| RTSPMessageHeader request = { 0 }; | |
| int ret = 0; | |
| /* Parsing headers */ | |
| ret = rtsp_read_request(s, &request, "OPTIONS"); | |
| if (ret) | |
| return ret; | |
| rt->seq++; | |
| /* Send Reply */ | |
| rtsp_send_reply(s, RTSP_STATUS_OK, | |
| "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD\r\n", | |
| request.seq); | |
| return 0; | |
| } | |
| static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| RTSPMessageHeader request = { 0 }; | |
| int ret = 0; | |
| char url[MAX_URL_SIZE]; | |
| RTSPStream *rtsp_st; | |
| char responseheaders[MAX_URL_SIZE]; | |
| int localport = -1; | |
| int transportidx = 0; | |
| int streamid = 0; | |
| ret = rtsp_read_request(s, &request, "SETUP"); | |
| if (ret) | |
| return ret; | |
| rt->seq++; | |
| if (!request.nb_transports) { | |
| av_log(s, AV_LOG_ERROR, "No transport defined in SETUP\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| for (transportidx = 0; transportidx < request.nb_transports; | |
| transportidx++) { | |
| if (!request.transports[transportidx].mode_record || | |
| (request.transports[transportidx].lower_transport != | |
| RTSP_LOWER_TRANSPORT_UDP && | |
| request.transports[transportidx].lower_transport != | |
| RTSP_LOWER_TRANSPORT_TCP)) { | |
| av_log(s, AV_LOG_ERROR, "mode=record/receive not set or transport" | |
| " protocol not supported (yet)\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| } | |
| if (request.nb_transports > 1) | |
| av_log(s, AV_LOG_WARNING, "More than one transport not supported, " | |
| "using first of all\n"); | |
| for (streamid = 0; streamid < rt->nb_rtsp_streams; streamid++) { | |
| if (!strcmp(rt->rtsp_streams[streamid]->control_url, | |
| controlurl)) | |
| break; | |
| } | |
| if (streamid == rt->nb_rtsp_streams) { | |
| av_log(s, AV_LOG_ERROR, "Unable to find requested track\n"); | |
| return AVERROR_STREAM_NOT_FOUND; | |
| } | |
| rtsp_st = rt->rtsp_streams[streamid]; | |
| localport = rt->rtp_port_min; | |
| /* check if the stream has already been setup */ | |
| if (rtsp_st->transport_priv) { | |
| if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RDT) | |
| ff_rdt_parse_close(rtsp_st->transport_priv); | |
| else if (CONFIG_RTPDEC && rt->transport == RTSP_TRANSPORT_RTP) | |
| ff_rtp_parse_close(rtsp_st->transport_priv); | |
| rtsp_st->transport_priv = NULL; | |
| } | |
| if (rtsp_st->rtp_handle) | |
| ffurl_closep(&rtsp_st->rtp_handle); | |
| if (request.transports[0].lower_transport == RTSP_LOWER_TRANSPORT_TCP) { | |
| rt->lower_transport = RTSP_LOWER_TRANSPORT_TCP; | |
| if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { | |
| rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); | |
| return ret; | |
| } | |
| rtsp_st->interleaved_min = request.transports[0].interleaved_min; | |
| rtsp_st->interleaved_max = request.transports[0].interleaved_max; | |
| snprintf(responseheaders, sizeof(responseheaders), "Transport: " | |
| "RTP/AVP/TCP;unicast;mode=record;interleaved=%d-%d" | |
| "\r\n", request.transports[0].interleaved_min, | |
| request.transports[0].interleaved_max); | |
| } else { | |
| do { | |
| AVDictionary *opts = NULL; | |
| av_dict_set_int(&opts, "buffer_size", rt->buffer_size, 0); | |
| ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL); | |
| av_log(s, AV_LOG_TRACE, "Opening: %s\n", url); | |
| ret = ffurl_open_whitelist(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE, | |
| &s->interrupt_callback, &opts, | |
| s->protocol_whitelist, s->protocol_blacklist, NULL); | |
| av_dict_free(&opts); | |
| if (ret) | |
| localport += 2; | |
| } while (ret || localport > rt->rtp_port_max); | |
| if (localport > rt->rtp_port_max) { | |
| rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); | |
| return ret; | |
| } | |
| av_log(s, AV_LOG_TRACE, "Listening on: %d\n", | |
| ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle)); | |
| if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { | |
| rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); | |
| return ret; | |
| } | |
| localport = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle); | |
| snprintf(responseheaders, sizeof(responseheaders), "Transport: " | |
| "RTP/AVP/UDP;unicast;mode=record;source=%s;" | |
| "client_port=%d-%d;server_port=%d-%d\r\n", | |
| host, request.transports[0].client_port_min, | |
| request.transports[0].client_port_max, localport, | |
| localport + 1); | |
| } | |
| /* Establish sessionid if not previously set */ | |
| /* Put this in a function? */ | |
| /* RFC 2326: session id must be at least 8 digits */ | |
| while (strlen(rt->session_id) < 8) | |
| av_strlcatf(rt->session_id, 512, "%u", av_get_random_seed()); | |
| av_strlcatf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", | |
| rt->session_id); | |
| /* Send Reply */ | |
| rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); | |
| rt->state = RTSP_STATE_PAUSED; | |
| return 0; | |
| } | |
| static int rtsp_read_record(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| RTSPMessageHeader request = { 0 }; | |
| int ret = 0; | |
| char responseheaders[MAX_URL_SIZE]; | |
| ret = rtsp_read_request(s, &request, "RECORD"); | |
| if (ret) | |
| return ret; | |
| ret = check_sessionid(s, &request); | |
| if (ret) | |
| return ret; | |
| rt->seq++; | |
| snprintf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", | |
| rt->session_id); | |
| rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); | |
| rt->state = RTSP_STATE_STREAMING; | |
| return 0; | |
| } | |
| static inline int parse_command_line(AVFormatContext *s, const char *line, | |
| int linelen, char *uri, int urisize, | |
| char *method, int methodsize, | |
| enum RTSPMethod *methodcode) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| const char *linept, *searchlinept; | |
| linept = strchr(line, ' '); | |
| if (!linept) { | |
| av_log(s, AV_LOG_ERROR, "Error parsing method string\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if (linept - line > methodsize - 1) { | |
| av_log(s, AV_LOG_ERROR, "Method string too long\n"); | |
| return AVERROR(EIO); | |
| } | |
| memcpy(method, line, linept - line); | |
| method[linept - line] = '\0'; | |
| linept++; | |
| if (!strcmp(method, "ANNOUNCE")) | |
| *methodcode = ANNOUNCE; | |
| else if (!strcmp(method, "OPTIONS")) | |
| *methodcode = OPTIONS; | |
| else if (!strcmp(method, "RECORD")) | |
| *methodcode = RECORD; | |
| else if (!strcmp(method, "SETUP")) | |
| *methodcode = SETUP; | |
| else if (!strcmp(method, "PAUSE")) | |
| *methodcode = PAUSE; | |
| else if (!strcmp(method, "TEARDOWN")) | |
| *methodcode = TEARDOWN; | |
| else | |
| *methodcode = UNKNOWN; | |
| /* Check method with the state */ | |
| if (rt->state == RTSP_STATE_IDLE) { | |
| if ((*methodcode != ANNOUNCE) && (*methodcode != OPTIONS)) { | |
| av_log(s, AV_LOG_ERROR, "Unexpected command in Idle State %s\n", | |
| line); | |
| return AVERROR_PROTOCOL_NOT_FOUND; | |
| } | |
| } else if (rt->state == RTSP_STATE_PAUSED) { | |
| if ((*methodcode != OPTIONS) && (*methodcode != RECORD) | |
| && (*methodcode != SETUP)) { | |
| av_log(s, AV_LOG_ERROR, "Unexpected command in Paused State %s\n", | |
| line); | |
| return AVERROR_PROTOCOL_NOT_FOUND; | |
| } | |
| } else if (rt->state == RTSP_STATE_STREAMING) { | |
| if ((*methodcode != PAUSE) && (*methodcode != OPTIONS) | |
| && (*methodcode != TEARDOWN)) { | |
| av_log(s, AV_LOG_ERROR, "Unexpected command in Streaming State" | |
| " %s\n", line); | |
| return AVERROR_PROTOCOL_NOT_FOUND; | |
| } | |
| } else { | |
| av_log(s, AV_LOG_ERROR, "Unexpected State [%d]\n", rt->state); | |
| return AVERROR_BUG; | |
| } | |
| searchlinept = strchr(linept, ' '); | |
| if (!searchlinept) { | |
| av_log(s, AV_LOG_ERROR, "Error parsing message URI\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if (searchlinept - linept > urisize - 1) { | |
| av_log(s, AV_LOG_ERROR, "uri string length exceeded buffer size\n"); | |
| return AVERROR(EIO); | |
| } | |
| memcpy(uri, linept, searchlinept - linept); | |
| uri[searchlinept - linept] = '\0'; | |
| if (strcmp(rt->control_uri, uri)) { | |
| char host[128], path[512], auth[128]; | |
| int port; | |
| char ctl_host[128], ctl_path[512], ctl_auth[128]; | |
| int ctl_port; | |
| av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port, | |
| path, sizeof(path), uri); | |
| av_url_split(NULL, 0, ctl_auth, sizeof(ctl_auth), ctl_host, | |
| sizeof(ctl_host), &ctl_port, ctl_path, sizeof(ctl_path), | |
| rt->control_uri); | |
| if (strcmp(host, ctl_host)) | |
| av_log(s, AV_LOG_INFO, "Host %s differs from expected %s\n", | |
| host, ctl_host); | |
| if (strcmp(path, ctl_path) && *methodcode != SETUP) | |
| av_log(s, AV_LOG_WARNING, "WARNING: Path %s differs from expected" | |
| " %s\n", path, ctl_path); | |
| if (*methodcode == ANNOUNCE) { | |
| av_log(s, AV_LOG_INFO, | |
| "Updating control URI to %s\n", uri); | |
| av_strlcpy(rt->control_uri, uri, sizeof(rt->control_uri)); | |
| } | |
| } | |
| linept = searchlinept + 1; | |
| if (!av_strstart(linept, "RTSP/1.0", NULL)) { | |
| av_log(s, AV_LOG_ERROR, "Error parsing protocol or version\n"); | |
| return AVERROR_PROTOCOL_NOT_FOUND; | |
| } | |
| return 0; | |
| } | |
| int ff_rtsp_parse_streaming_commands(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| unsigned char rbuf[MAX_URL_SIZE]; | |
| unsigned char method[10]; | |
| char uri[500]; | |
| int ret; | |
| int rbuflen = 0; | |
| RTSPMessageHeader request = { 0 }; | |
| enum RTSPMethod methodcode; | |
| ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); | |
| if (ret < 0) | |
| return ret; | |
| av_log(s, AV_LOG_TRACE, "Parsing[%d]: %s\n", rbuflen, rbuf); | |
| ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method, | |
| sizeof(method), &methodcode); | |
| if (ret) { | |
| av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n"); | |
| return ret; | |
| } | |
| ret = rtsp_read_request(s, &request, method); | |
| if (ret) | |
| return ret; | |
| rt->seq++; | |
| if (methodcode == PAUSE) { | |
| rt->state = RTSP_STATE_PAUSED; | |
| ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq); | |
| // TODO: Missing date header in response | |
| } else if (methodcode == OPTIONS) { | |
| ret = rtsp_send_reply(s, RTSP_STATUS_OK, | |
| "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, " | |
| "RECORD\r\n", request.seq); | |
| } else if (methodcode == TEARDOWN) { | |
| rt->state = RTSP_STATE_IDLE; | |
| ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq); | |
| } | |
| return ret; | |
| } | |
| static int rtsp_read_play(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| RTSPMessageHeader reply1, *reply = &reply1; | |
| int i; | |
| char cmd[MAX_URL_SIZE]; | |
| av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state); | |
| rt->nb_byes = 0; | |
| if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP) { | |
| for (i = 0; i < rt->nb_rtsp_streams; i++) { | |
| RTSPStream *rtsp_st = rt->rtsp_streams[i]; | |
| /* Try to initialize the connection state in a | |
| * potential NAT router by sending dummy packets. | |
| * RTP/RTCP dummy packets are used for RDT, too. | |
| */ | |
| if (rtsp_st->rtp_handle && | |
| !(rt->server_type == RTSP_SERVER_WMS && i > 1)) | |
| ff_rtp_send_punch_packets(rtsp_st->rtp_handle); | |
| } | |
| } | |
| if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { | |
| if (rt->transport == RTSP_TRANSPORT_RTP) { | |
| for (i = 0; i < rt->nb_rtsp_streams; i++) { | |
| RTSPStream *rtsp_st = rt->rtsp_streams[i]; | |
| RTPDemuxContext *rtpctx = rtsp_st->transport_priv; | |
| if (!rtpctx) | |
| continue; | |
| ff_rtp_reset_packet_queue(rtpctx); | |
| rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE; | |
| rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE; | |
| rtpctx->base_timestamp = 0; | |
| rtpctx->timestamp = 0; | |
| rtpctx->unwrapped_timestamp = 0; | |
| rtpctx->rtcp_ts_offset = 0; | |
| } | |
| } | |
| if (rt->state == RTSP_STATE_PAUSED) { | |
| cmd[0] = 0; | |
| } else { | |
| snprintf(cmd, sizeof(cmd), | |
| "Range: npt=%"PRId64".%03"PRId64"-\r\n", | |
| rt->seek_timestamp / AV_TIME_BASE, | |
| rt->seek_timestamp / (AV_TIME_BASE / 1000) % 1000); | |
| } | |
| ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL); | |
| if (reply->status_code != RTSP_STATUS_OK) { | |
| return ff_rtsp_averror(reply->status_code, -1); | |
| } | |
| if (rt->transport == RTSP_TRANSPORT_RTP && | |
| reply->range_start != AV_NOPTS_VALUE) { | |
| for (i = 0; i < rt->nb_rtsp_streams; i++) { | |
| RTSPStream *rtsp_st = rt->rtsp_streams[i]; | |
| RTPDemuxContext *rtpctx = rtsp_st->transport_priv; | |
| AVStream *st = NULL; | |
| if (!rtpctx || rtsp_st->stream_index < 0) | |
| continue; | |
| st = s->streams[rtsp_st->stream_index]; | |
| rtpctx->range_start_offset = | |
| av_rescale_q(reply->range_start, AV_TIME_BASE_Q, | |
| st->time_base); | |
| } | |
| } | |
| } | |
| rt->state = RTSP_STATE_STREAMING; | |
| return 0; | |
| } | |
| /* pause the stream */ | |
| static int rtsp_read_pause(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| RTSPMessageHeader reply1, *reply = &reply1; | |
| if (rt->state != RTSP_STATE_STREAMING) | |
| return 0; | |
| else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { | |
| ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL); | |
| if (reply->status_code != RTSP_STATUS_OK) { | |
| return ff_rtsp_averror(reply->status_code, -1); | |
| } | |
| } | |
| rt->state = RTSP_STATE_PAUSED; | |
| return 0; | |
| } | |
| int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| char cmd[MAX_URL_SIZE]; | |
| unsigned char *content = NULL; | |
| int ret; | |
| /* describe the stream */ | |
| snprintf(cmd, sizeof(cmd), | |
| "Accept: application/sdp\r\n"); | |
| if (rt->server_type == RTSP_SERVER_REAL) { | |
| /** | |
| * The Require: attribute is needed for proper streaming from | |
| * Realmedia servers. | |
| */ | |
| av_strlcat(cmd, | |
| "Require: com.real.retain-entity-for-setup\r\n", | |
| sizeof(cmd)); | |
| } | |
| ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content); | |
| if (reply->status_code != RTSP_STATUS_OK) { | |
| av_freep(&content); | |
| return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA); | |
| } | |
| if (!content) | |
| return AVERROR_INVALIDDATA; | |
| av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", content); | |
| /* now we got the SDP description, we parse it */ | |
| ret = ff_sdp_parse(s, (const char *)content); | |
| av_freep(&content); | |
| if (ret < 0) | |
| return ret; | |
| return 0; | |
| } | |
| static int rtsp_listen(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| char proto[128], host[128], path[512], auth[128]; | |
| char uri[500]; | |
| int port; | |
| int default_port = RTSP_DEFAULT_PORT; | |
| char tcpname[500]; | |
| const char *lower_proto = "tcp"; | |
| unsigned char rbuf[MAX_URL_SIZE]; | |
| unsigned char method[10]; | |
| int rbuflen = 0; | |
| int ret; | |
| enum RTSPMethod methodcode; | |
| if (!ff_network_init()) | |
| return AVERROR(EIO); | |
| /* extract hostname and port */ | |
| av_url_split(proto, sizeof(proto), auth, sizeof(auth), host, sizeof(host), | |
| &port, path, sizeof(path), s->url); | |
| /* ff_url_join. No authorization by now (NULL) */ | |
| ff_url_join(rt->control_uri, sizeof(rt->control_uri), proto, NULL, host, | |
| port, "%s", path); | |
| if (!strcmp(proto, "rtsps")) { | |
| lower_proto = "tls"; | |
| default_port = RTSPS_DEFAULT_PORT; | |
| } | |
| if (port < 0) | |
| port = default_port; | |
| /* Create TCP connection */ | |
| ff_url_join(tcpname, sizeof(tcpname), lower_proto, NULL, host, port, | |
| "?listen&listen_timeout=%d", rt->initial_timeout * 1000); | |
| if (ret = ffurl_open_whitelist(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE, | |
| &s->interrupt_callback, NULL, | |
| s->protocol_whitelist, s->protocol_blacklist, NULL)) { | |
| av_log(s, AV_LOG_ERROR, "Unable to open RTSP for listening\n"); | |
| goto fail; | |
| } | |
| rt->state = RTSP_STATE_IDLE; | |
| rt->rtsp_hd_out = rt->rtsp_hd; | |
| for (;;) { /* Wait for incoming RTSP messages */ | |
| ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); | |
| if (ret < 0) | |
| goto fail; | |
| av_log(s, AV_LOG_TRACE, "Parsing[%d]: %s\n", rbuflen, rbuf); | |
| ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method, | |
| sizeof(method), &methodcode); | |
| if (ret) { | |
| av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n"); | |
| goto fail; | |
| } | |
| if (methodcode == ANNOUNCE) { | |
| ret = rtsp_read_announce(s); | |
| rt->state = RTSP_STATE_PAUSED; | |
| } else if (methodcode == OPTIONS) { | |
| ret = rtsp_read_options(s); | |
| } else if (methodcode == RECORD) { | |
| ret = rtsp_read_record(s); | |
| if (!ret) | |
| return 0; // We are ready for streaming | |
| } else if (methodcode == SETUP) | |
| ret = rtsp_read_setup(s, host, uri); | |
| if (ret) { | |
| ret = AVERROR_INVALIDDATA; | |
| goto fail; | |
| } | |
| } | |
| fail: | |
| ff_rtsp_close_streams(s); | |
| ff_rtsp_close_connections(s); | |
| ff_network_close(); | |
| return ret; | |
| } | |
| static int rtsp_probe(const AVProbeData *p) | |
| { | |
| if ( | |
| #if CONFIG_TLS_PROTOCOL | |
| av_strstart(p->filename, "rtsps:", NULL) || | |
| #endif | |
| av_strstart(p->filename, "satip:", NULL) || | |
| av_strstart(p->filename, "rtsp:", NULL)) | |
| return AVPROBE_SCORE_MAX; | |
| return 0; | |
| } | |
| static int rtsp_read_header(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| int ret; | |
| if (rt->initial_timeout > 0) | |
| rt->rtsp_flags |= RTSP_FLAG_LISTEN; | |
| if (rt->rtsp_flags & RTSP_FLAG_LISTEN) { | |
| ret = rtsp_listen(s); | |
| if (ret) | |
| return ret; | |
| } else { | |
| ret = ff_rtsp_connect(s); | |
| if (ret) | |
| return ret; | |
| rt->real_setup_cache = !s->nb_streams ? NULL : | |
| av_calloc(s->nb_streams, 2 * sizeof(*rt->real_setup_cache)); | |
| if (!rt->real_setup_cache && s->nb_streams) { | |
| ret = AVERROR(ENOMEM); | |
| goto fail; | |
| } | |
| rt->real_setup = rt->real_setup_cache + s->nb_streams; | |
| if (rt->initial_pause) { | |
| /* do not start immediately */ | |
| } else { | |
| ret = rtsp_read_play(s); | |
| if (ret < 0) | |
| goto fail; | |
| } | |
| } | |
| return 0; | |
| fail: | |
| rtsp_read_close(s); | |
| return ret; | |
| } | |
| int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, | |
| uint8_t *buf, int buf_size) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| int id, len, i, ret; | |
| RTSPStream *rtsp_st; | |
| av_log(s, AV_LOG_TRACE, "tcp_read_packet:\n"); | |
| redo: | |
| for (;;) { | |
| RTSPMessageHeader reply; | |
| ret = ff_rtsp_read_reply(s, &reply, NULL, 1, NULL); | |
| if (ret < 0) | |
| return ret; | |
| if (ret == 1) /* received '$' */ | |
| break; | |
| /* XXX: parse message */ | |
| if (rt->state != RTSP_STATE_STREAMING) | |
| return 0; | |
| } | |
| ret = ffurl_read_complete(rt->rtsp_hd, buf, 3); | |
| if (ret != 3) | |
| return AVERROR(EIO); | |
| id = buf[0]; | |
| len = AV_RB16(buf + 1); | |
| av_log(s, AV_LOG_TRACE, "id=%d len=%d\n", id, len); | |
| if (len > buf_size || len < 8) | |
| goto redo; | |
| /* get the data */ | |
| ret = ffurl_read_complete(rt->rtsp_hd, buf, len); | |
| if (ret != len) | |
| return AVERROR(EIO); | |
| if (rt->transport == RTSP_TRANSPORT_RDT && | |
| (ret = ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL)) < 0) | |
| return ret; | |
| /* find the matching stream */ | |
| for (i = 0; i < rt->nb_rtsp_streams; i++) { | |
| rtsp_st = rt->rtsp_streams[i]; | |
| if (id >= rtsp_st->interleaved_min && | |
| id <= rtsp_st->interleaved_max) | |
| goto found; | |
| } | |
| goto redo; | |
| found: | |
| *prtsp_st = rtsp_st; | |
| return len; | |
| } | |
| static int resetup_tcp(AVFormatContext *s) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| char host[1024]; | |
| int port; | |
| av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0, | |
| s->url); | |
| ff_rtsp_undo_setup(s, 0); | |
| return ff_rtsp_make_setup_request(s, host, port, RTSP_LOWER_TRANSPORT_TCP, | |
| rt->real_challenge); | |
| } | |
| static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| int ret; | |
| RTSPMessageHeader reply1, *reply = &reply1; | |
| char cmd[MAX_URL_SIZE]; | |
| retry: | |
| if (rt->server_type == RTSP_SERVER_REAL) { | |
| int i; | |
| for (i = 0; i < s->nb_streams; i++) | |
| rt->real_setup[i] = s->streams[i]->discard; | |
| if (!rt->need_subscription) { | |
| if (memcmp (rt->real_setup, rt->real_setup_cache, | |
| sizeof(enum AVDiscard) * s->nb_streams)) { | |
| snprintf(cmd, sizeof(cmd), | |
| "Unsubscribe: %s\r\n", | |
| rt->last_subscription); | |
| ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, | |
| cmd, reply, NULL); | |
| if (reply->status_code != RTSP_STATUS_OK) | |
| return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA); | |
| rt->need_subscription = 1; | |
| } | |
| } | |
| if (rt->need_subscription) { | |
| int r, rule_nr, first = 1; | |
| memcpy(rt->real_setup_cache, rt->real_setup, | |
| sizeof(enum AVDiscard) * s->nb_streams); | |
| rt->last_subscription[0] = 0; | |
| snprintf(cmd, sizeof(cmd), | |
| "Subscribe: "); | |
| for (i = 0; i < rt->nb_rtsp_streams; i++) { | |
| rule_nr = 0; | |
| for (r = 0; r < s->nb_streams; r++) { | |
| if (s->streams[r]->id == i) { | |
| if (s->streams[r]->discard != AVDISCARD_ALL) { | |
| if (!first) | |
| av_strlcat(rt->last_subscription, ",", | |
| sizeof(rt->last_subscription)); | |
| ff_rdt_subscribe_rule( | |
| rt->last_subscription, | |
| sizeof(rt->last_subscription), i, rule_nr); | |
| first = 0; | |
| } | |
| rule_nr++; | |
| } | |
| } | |
| } | |
| av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription); | |
| ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, | |
| cmd, reply, NULL); | |
| if (reply->status_code != RTSP_STATUS_OK) | |
| return ff_rtsp_averror(reply->status_code, AVERROR_INVALIDDATA); | |
| rt->need_subscription = 0; | |
| if (rt->state == RTSP_STATE_STREAMING) | |
| rtsp_read_play (s); | |
| } | |
| } | |
| ret = ff_rtsp_fetch_packet(s, pkt); | |
| if (ret < 0) { | |
| if (ret == AVERROR(ETIMEDOUT) && !rt->packets) { | |
| if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP && | |
| rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) { | |
| RTSPMessageHeader reply1, *reply = &reply1; | |
| av_log(s, AV_LOG_WARNING, "UDP timeout, retrying with TCP\n"); | |
| if (rtsp_read_pause(s) != 0) | |
| return -1; | |
| // TEARDOWN is required on Real-RTSP, but might make | |
| // other servers close the connection. | |
| if (rt->server_type == RTSP_SERVER_REAL) | |
| ff_rtsp_send_cmd(s, "TEARDOWN", rt->control_uri, NULL, | |
| reply, NULL); | |
| rt->session_id[0] = '\0'; | |
| if (resetup_tcp(s) == 0) { | |
| rt->state = RTSP_STATE_IDLE; | |
| rt->need_subscription = 1; | |
| if (rtsp_read_play(s) != 0) | |
| return -1; | |
| goto retry; | |
| } | |
| } | |
| } | |
| return ret; | |
| } | |
| rt->packets++; | |
| if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) { | |
| /* send dummy request to keep TCP connection alive */ | |
| if ((av_gettime_relative() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2 || | |
| rt->auth_state.stale) { | |
| if (rt->server_type == RTSP_SERVER_WMS || | |
| (rt->server_type != RTSP_SERVER_REAL && | |
| rt->get_parameter_supported)) { | |
| ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL); | |
| } else { | |
| ff_rtsp_send_cmd_async(s, "OPTIONS", rt->control_uri, NULL); | |
| } | |
| /* The stale flag should be reset when creating the auth response in | |
| * ff_rtsp_send_cmd_async, but reset it here just in case we never | |
| * called the auth code (if we didn't have any credentials set). */ | |
| rt->auth_state.stale = 0; | |
| } | |
| } | |
| return 0; | |
| } | |
| static int rtsp_read_seek(AVFormatContext *s, int stream_index, | |
| int64_t timestamp, int flags) | |
| { | |
| RTSPState *rt = s->priv_data; | |
| int ret; | |
| rt->seek_timestamp = av_rescale_q(timestamp, | |
| s->streams[stream_index]->time_base, | |
| AV_TIME_BASE_Q); | |
| switch(rt->state) { | |
| default: | |
| case RTSP_STATE_IDLE: | |
| break; | |
| case RTSP_STATE_STREAMING: | |
| if ((ret = rtsp_read_pause(s)) != 0) | |
| return ret; | |
| rt->state = RTSP_STATE_SEEKING; | |
| if ((ret = rtsp_read_play(s)) != 0) | |
| return ret; | |
| break; | |
| case RTSP_STATE_PAUSED: | |
| rt->state = RTSP_STATE_IDLE; | |
| break; | |
| } | |
| return 0; | |
| } | |
| static const AVClass rtsp_demuxer_class = { | |
| .class_name = "RTSP demuxer", | |
| .item_name = av_default_item_name, | |
| .option = ff_rtsp_options, | |
| .version = LIBAVUTIL_VERSION_INT, | |
| }; | |
| const FFInputFormat ff_rtsp_demuxer = { | |
| .p.name = "rtsp", | |
| .p.long_name = NULL_IF_CONFIG_SMALL("RTSP input"), | |
| .p.flags = AVFMT_NOFILE, | |
| .p.priv_class = &rtsp_demuxer_class, | |
| .priv_data_size = sizeof(RTSPState), | |
| .read_probe = rtsp_probe, | |
| .read_header = rtsp_read_header, | |
| .read_packet = rtsp_read_packet, | |
| .read_close = rtsp_read_close, | |
| .read_seek = rtsp_read_seek, | |
| .read_play = rtsp_read_play, | |
| .read_pause = rtsp_read_pause, | |
| }; |