---
libavformat/rtsp.c | 30 ++-
libavformat/rtsp.h | 12 ++
libavformat/rtspcodes.h | 14 ++
libavformat/rtspdec.c | 549 ++++++++++++++++++++++++++++++++++++++++++++---
4 files changed, 566 insertions(+), 39 deletions(-)
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index d4206a1..f98dc6b 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -63,7 +63,8 @@
#define RTSP_FLAG_OPTS(name, longname) \
{ name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC,
"rtsp_flags" }, \
- { "filter_src", "Only receive packets from the negotiated peer IP", 0,
AV_OPT_TYPE_CONST, {RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
+ { "filter_src", "Only receive packets from the negotiated peer IP", 0,
AV_OPT_TYPE_CONST, {RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }, \
+ { "listen", "Wait for incoming connections", 0, AV_OPT_TYPE_CONST,
{RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" }
#define RTSP_MEDIATYPE_OPTS(name, longname) \
{ name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { (1 <<
(AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
@@ -83,6 +84,7 @@ const AVOption ff_rtsp_options[] = {
RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the
server"),
{ "min_port", "Minimum local UDP port", OFFSET(rtp_port_min),
AV_OPT_TYPE_INT, {RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
{ "max_port", "Maximum local UDP port", OFFSET(rtp_port_max),
AV_OPT_TYPE_INT, {RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
+ { "timeout", "Maximum timeout (in seconds) to wait for incoming connections. -1
is infinite. Implies flag listen", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {-1}, INT_MIN,
INT_MAX, DEC },
{ NULL },
};
@@ -1714,14 +1716,24 @@ static int udp_read_packet(AVFormatContext *s,
RTSPStream **prtsp_st,
}
#if CONFIG_RTSP_DEMUXER
if (tcp_fd != -1 && p[0].revents & POLLIN) {
- RTSPMessageHeader reply;
-
- ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
- if (ret < 0)
- return ret;
- /* XXX: parse message */
- if (rt->state != RTSP_STATE_STREAMING)
- return 0;
+ if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
+ if (rt->state == RTSP_STATE_STREAMING) {
+ if (!ff_rtsp_parse_streaming_commands(s))
+ return AVERROR_EOF;
+ else
+ av_log(s, AV_LOG_WARNING,
+ "Unable to answer to TEARDOWN\n");
+ } else
+ return 0;
+ } else {
+ RTSPMessageHeader reply;
+ ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
+ if (ret < 0)
+ return ret;
+ /* XXX: parse message */
+ if (rt->state != RTSP_STATE_STREAMING)
+ return 0;
+ }
}
#endif
} else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
diff --git a/libavformat/rtsp.h b/libavformat/rtsp.h
index 41bf8bb..a1dbf33 100644
--- a/libavformat/rtsp.h
+++ b/libavformat/rtsp.h
@@ -372,11 +372,17 @@ typedef struct RTSPState {
* Minimum and maximum local UDP ports.
*/
int rtp_port_min, rtp_port_max;
+
+ /**
+ * Timeout to wait for incoming connections.
+ */
+ int initial_timeout;
} RTSPState;
#define RTSP_FLAG_FILTER_SRC 0x1 /**< Filter incoming UDP packets -
receive packets only from the right
source address and port. */
+#define RTSP_FLAG_LISTEN 0x2 /**< Wait for incoming connections. */
/**
* Describe a single stream, as identified by a single m= line block in the
@@ -529,6 +535,12 @@ int ff_rtsp_setup_input_streams(AVFormatContext *s,
RTSPMessageHeader *reply);
int ff_rtsp_setup_output_streams(AVFormatContext *s, const char *addr);
/**
+ * Parses RTSP commands (OPTIONS, PAUSE and TEARDOWN) on listen mode.
+ * @return 0 if SUCCESS and 1 if TEARDOWN Received
+ */
+int ff_rtsp_parse_streaming_commands(AVFormatContext *s);
+
+/**
* Parse an SDP description of streams by populating an RTSPState struct
* within the AVFormatContext; also allocate the RTP streams and the
* pollfd array used for UDP streams.
diff --git a/libavformat/rtspcodes.h b/libavformat/rtspcodes.h
index 63ceb66..31ab336 100644
--- a/libavformat/rtspcodes.h
+++ b/libavformat/rtspcodes.h
@@ -37,4 +37,18 @@ RTSP_STATUS_SERVICE =503, /**< Service Unavailable */
RTSP_STATUS_VERSION =505, /**< RTSP Version not supported */
};
+enum RTSPMethod {
+ DESCRIBE,
+ ANNOUNCE,
+ OPTIONS,
+ SETUP,
+ PLAY,
+ PAUSE,
+ TEARDOWN,
+ GET_PARAMETER,
+ SET_PARAMETER,
+ REDIRECT,
+ RECORD,
+ UNKNOWN = -1,
+};
#endif /* AVFORMAT_RTSPCODES_H */
diff --git a/libavformat/rtspdec.c b/libavformat/rtspdec.c
index 6226f41..b603792 100644
--- a/libavformat/rtspdec.c
+++ b/libavformat/rtspdec.c
@@ -22,6 +22,7 @@
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
+#include "libavutil/random_seed.h"
#include "avformat.h"
#include "internal.h"
@@ -31,11 +32,30 @@
#include "rdt.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;
- ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
+ 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);
@@ -45,6 +65,403 @@ static int rtsp_read_close(AVFormatContext *s)
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;
+ 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(EFAULT);
+}
+
+static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code,
+ const char *extracontent, uint16_t seq)
+{
+ RTSPState *rt = s->priv_data;
+ char message[4096];
+ 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: LibAVFormat %d\r\n",
+ LIBAVFORMAT_VERSION_INT);
+ if (extracontent)
+ av_strlcat(message, extracontent, sizeof(message));
+ av_strlcat(message, "\r\n", sizeof(message));
+ av_dlog(s, "Sending response:\n%s", message);
+ ffurl_write(rt->rtsp_hd, message, strlen(message));
+
+ return 0;
+}
+
+static inline int check_sessionid(AVFormatContext *s,
+ unsigned char *session_id,
+ RTSPMessageHeader *request)
+{
+ if (session_id[0] && strcmp(session_id, request->session_id)) {
+ av_log(s, AV_LOG_ERROR, "Unexpected SessionId %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[1024];
+ int rbuflen, ret;
+ do {
+ ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
+ if (ret)
+ return ret;
+ if (rbuflen > 1) {
+ av_dlog(s, "Parsing[%d]: %s", rbuflen, rbuf);
+ ff_rtsp_parse_line(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, rt->session_id, request);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rtsp_read_announce(AVFormatContext *s)
+{
+ RTSPState *rt = s->priv_data;
+ RTSPMessageHeader request = { 0 };
+ char sdp[4096];
+ 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)) {
+ /* 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(E2BIG);
+}
+
+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[1024];
+ RTSPStream *rtsp_st;
+ char responseheaders[1024];
+ int localport = -1;
+ int transportidx = 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");
+ if (strcmp(rt->rtsp_streams[0]->control_url,
+ controlurl)) {
+ av_log(s, AV_LOG_ERROR, "Unable to find requested track\n");
+ return AVERROR_STREAM_NOT_FOUND;
+ }
+ rtsp_st = rt->rtsp_streams[0];
+ localport = rt->rtp_port_min;
+
+ 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;
+ }
+ snprintf(responseheaders, sizeof(responseheaders), "Transport: "
+ "RTP/AVP/TCP;unicast;mode=receive;source=%s;interleaved=%d-%d"
+ "\r\n", host, request.transports[0].interleaved_min,
+ request.transports[0].interleaved_max);
+ } else {
+ do {
+ ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL);
+ av_dlog(s, "Opening: %s", url);
+ ret = ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
+ &s->interrupt_callback, NULL);
+ 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_dlog(s, "Listening on: %d",
+ 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[1024];
+
+ ret = rtsp_read_request(s, &request, "RECORD");
+ if (ret)
+ return ret;
+ ret = check_sessionid(s, rt->session_id, &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 - line > methodsize - 1) {
+ av_log(s, AV_LOG_ERROR, "Method string too long\n");
+ return AVERROR(EFAULT);
+ }
+ 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;
+ }
+ }
+ searchlinept = strchr(linept, ' ');
+ if (searchlinept == NULL) {
+ 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(EFAULT);
+ }
+ memcpy(uri, linept, searchlinept - linept);
+ uri[searchlinept - linept] = '\0';
+ if (!strcmp(rt->control_uri, uri)) {
+ av_dlog(s, "Warning received \"%s\" doesn't"
+ " look like \"%s\".\n",
+ uri, rt->control_uri);
+ if (*methodcode == ANNOUNCE) {
+ av_log(s, AV_LOG_INFO,
+ "WARNING: Updating control URI to %s\n", uri);
+ strcpy(rt->control_uri, uri);
+ }
