| /* |
| * 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 "libavutil/avstring.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/random_seed.h" |
| #include "libavutil/time.h" |
| #include "avformat.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" |
| |
| 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[SDP_MAX_SIZE]; |
| 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 && request.content_length < sizeof(sdp) - 1) { |
| /* 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); |
| return AVERROR(EIO); |
| } |
| sdp[request.content_length] = '\0'; |
| av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp); |
| ret = ff_sdp_parse(s, 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=receive;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=receive;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, "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_mallocz_array(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, |
| }; |
| |
| AVInputFormat ff_rtsp_demuxer = { |
| .name = "rtsp", |
| .long_name = NULL_IF_CONFIG_SMALL("RTSP input"), |
| .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, |
| .flags = AVFMT_NOFILE, |
| .read_play = rtsp_read_play, |
| .read_pause = rtsp_read_pause, |
| .priv_class = &rtsp_demuxer_class, |
| }; |
