internal RtspResponse HandlePullSetup(RtspRequestSetup request)
{
var response = request.CreateResponse();
if (string.IsNullOrEmpty(response.Session))
{
// TODO Allocate a real session ID
response.Session = sessionGenerator.Next().ToString();
}
var pushUri = GetPushUri(request.RtspUri.AbsolutePath);
RtspPushDescription description;
if (PushDescriptions.TryGetValue(pushUri, out description))
{
//TODO get port and multicast address from description.
var forwarder = description.GetForwarderFor(pushUri);
var transport = new RtspTransport();
RtspTransport newTransport = new RtspTransport()
{
IsMulticast = true,
Destination = forwarder.ForwardHostVideo,
Port = new PortCouple(forwarder.ForwardPortVideo, forwarder.ListenCommandPort)
};
response.Headers[RtspHeaderNames.Transport] = newTransport.ToString();
}
else
{
response.ReturnCode = 404;
}
return(response);
}
public void ToStringTCP()
{
RtspTransport transport = new RtspTransport()
{
LowerTransport = RtspTransport.LowerTransportType.TCP,
Interleaved = new PortCouple(0, 1),
};
Assert.AreEqual("RTP/AVP/TCP;interleaved=0-1", transport.ToString());
}
private void RTSP_ProcessSetupRequest(RtspRequestSetup message, RtspListener listener)
{
//
var setupMessage = message;
// Check the RTSP transport
// If it is UDP or Multicast, create the sockets
// If it is RTP over RTSP we send data via the RTSP Listener
// FIXME client may send more than one possible transport.
// very rare
RtspTransport transport = setupMessage.GetTransports()[0];
// Construct the Transport: reply from the Server to the client
Rtsp.UDPSocket udp_pair;
RtspTransport transport_reply = RTSP_ConstructReplyTransport(transport, out udp_pair);
bool mediaTransportSet = false;
if (transport_reply != null)
{
// Update the session with transport information
String copy_of_session_id = "";
// ToDo - Check the Track ID to determine if this is a SETUP for the Video Stream
// or a SETUP for an Audio Stream.
// In the SDP the H264 video track is TrackID 0
// Add the transports to the connection
if (contentBase != null)
{
string controlTrack = setupMessage.RtspUri.AbsoluteUri.Replace(contentBase, string.Empty);
var requestMedia = _sdpFile.Medias.FirstOrDefault(media =>
media.Attributs.FirstOrDefault(a => a.Key == "control" &&
(a.Value == controlTrack || "/" + a.Value == controlTrack)) != null);
if (requestMedia != null)
{
if (requestMedia.MediaType == Media.MediaTypes.video)
{
_videoClientTransport = transport;
_videoTransportReply = transport_reply;
// If we are sending in UDP mode, add the UDP Socket pair and the Client Hostname
if (_videoUdpPair != null)
{
ReleaseUDPSocket(_videoUdpPair);
}
_videoUdpPair = udp_pair;
mediaTransportSet = true;
if (setupMessage.Session == null)
{
_videoSessionId = _sessionHandle.ToString();
_sessionHandle++;
}
else
{
_videoSessionId = setupMessage.Session;
}
// Copy the Session ID
copy_of_session_id = _videoSessionId;
}
if (requestMedia.MediaType == Media.MediaTypes.audio)
{
_audioClientTransport = transport;
_audioTransportReply = transport_reply;
// If we are sending in UDP mode, add the UDP Socket pair and the Client Hostname
if (_audioUdpPair != null)
{
ReleaseUDPSocket(_audioUdpPair);
}
_audioUdpPair = udp_pair;
mediaTransportSet = true;
if (setupMessage.Session == null)
{
_audioSessionId = _sessionHandle.ToString();
_sessionHandle++;
}
else
{
_audioSessionId = setupMessage.Session;
}
// Copy the Session ID
copy_of_session_id = _audioSessionId;
}
}
}
if (false == mediaTransportSet)
{
Rtsp.Messages.RtspResponse setup_response = setupMessage.CreateResponse(_logger);
// unsuported mediatime
setup_response.ReturnCode = 415;
listener.SendMessage(setup_response);
}
else
{
Rtsp.Messages.RtspResponse setup_response = setupMessage.CreateResponse(_logger);
setup_response.Headers[Rtsp.Messages.RtspHeaderNames.Transport] = transport_reply.ToString();
setup_response.Session = copy_of_session_id;
setup_response.Timeout = timeout_in_seconds;
listener.SendMessage(setup_response);
}
}
else
{
Rtsp.Messages.RtspResponse setup_response = setupMessage.CreateResponse(_logger);
// unsuported transport
setup_response.ReturnCode = 461;
listener.SendMessage(setup_response);
}
if (false == mediaTransportSet)
{
if (udp_pair != null)
{
ReleaseUDPSocket(udp_pair);
udp_pair = null;
}
}
}
/// <summary>
/// Configures the transport and forwarder.
/// </summary>
/// <param name="aMessage">A message.</param>
/// <param name="forwarder">The preset forwarder.</param>
/// <returns>The configured forwarder.</returns>
private static Forwarder ConfigureTransportAndForwarder(RtspMessage aMessage, UDPForwarder forwarder)
{
RtspTransport transport = RtspTransport.Parse(aMessage.Headers[RtspHeaderNames.Transport]);
Forwarder resultForwarder;
if (transport.LowerTransport == RtspTransport.LowerTransportType.UDP)
{
if (transport.ServerPort != null)
{
forwarder.SourcePortVideo = transport.ServerPort.First;
forwarder.ForwardPortCommand = transport.ServerPort.Second;
}
resultForwarder = forwarder;
}
else
{
TCPtoUDPForwader TCPForwarder = new TCPtoUDPForwader();
TCPForwarder.ForwardCommand = aMessage.SourcePort;
TCPForwarder.SourceInterleavedVideo = transport.Interleaved.First;
TCPForwarder.ForwardInterleavedCommand = transport.Interleaved.Second;
// we need to transfer already getted values
TCPForwarder.ForwardHostVideo = forwarder.ForwardHostVideo;
TCPForwarder.ForwardPortVideo = forwarder.ForwardPortVideo;
TCPForwarder.SourcePortCommand = forwarder.SourcePortCommand;
TCPForwarder.ToMulticast = forwarder.ToMulticast;
resultForwarder = TCPForwarder;
}
if (resultForwarder.ToMulticast)
{
// Setup port and destination multicast.
resultForwarder.ForwardHostVideo = CreateNextMulticastAddress();
resultForwarder.ForwardPortVideo = forwarder.FromForwardVideoPort;
RtspTransport newTransport = new RtspTransport()
{
IsMulticast = true,
Destination = resultForwarder.ForwardHostVideo,
Port = new PortCouple(resultForwarder.ForwardPortVideo, resultForwarder.ListenCommandPort)
};
if ((resultForwarder is UDPForwarder && forwarder.ForwardPortCommand == 0) ||
(resultForwarder is TCPtoUDPForwader && (resultForwarder as TCPtoUDPForwader).ForwardInterleavedCommand == 0))
{
newTransport.Port = null;
}
aMessage.Headers[RtspHeaderNames.Transport] = newTransport.ToString();
}
else
{
RtspTransport newTransport = new RtspTransport()
{
IsMulticast = false,
Destination = forwarder.ForwardHostVideo,
ClientPort = new PortCouple(resultForwarder.ForwardPortVideo, resultForwarder.SourcePortCommand),
ServerPort = new PortCouple(resultForwarder.FromForwardVideoPort, resultForwarder.ListenCommandPort)
};
if ((resultForwarder is UDPForwarder && forwarder.ForwardPortCommand == 0) ||
(resultForwarder is TCPtoUDPForwader && (resultForwarder as TCPtoUDPForwader).ForwardInterleavedCommand == 0))
{
newTransport.ServerPort = null;
}
aMessage.Headers[RtspHeaderNames.Transport] = newTransport.ToString();
}
return(resultForwarder);
}
/// <summary>
/// Handles a request setup.
/// </summary>
/// <param name="destination">The destination.</param>
/// <param name="requestSetup">The request setup.</param>
/// <returns>The rewritten message</returns>
/// <remarks>
/// The destination can be modified.
/// </remarks>
private RtspMessage HandleRequestSetup(ref RtspListener destination, RtspRequestSetup requestSetup)
{
Contract.Requires(requestSetup != null);
Contract.Requires(destination != null);
Contract.Ensures(Contract.Result <RtspMessage>() != null);
Contract.Ensures(Contract.ValueAtReturn(out destination) != null);
// look if we already have a multicast streaming playing for this URI.
foreach (var session in _activesSession.Values)
{
if (session.State == RtspSession.SessionState.Playing && session.ListOfForwader.ContainsKey(requestSetup.RtspUri))
{
Forwarder existingForwarder = session.ListOfForwader[requestSetup.RtspUri];
if (existingForwarder != null && existingForwarder.ToMulticast)
{
RtspResponse returnValue = requestSetup.CreateResponse();
returnValue.Headers[RtspHeaderNames.Transport] = new RtspTransport()
{
IsMulticast = true,
Destination = existingForwarder.ForwardHostVideo,
Port = new PortCouple(existingForwarder.ForwardPortVideo, existingForwarder.ListenCommandPort),
}.ToString();
returnValue.Session = session.Name;
destination = requestSetup.SourcePort;
return(returnValue);
}
}
}
string setupKey = requestSetup.SourcePort.RemoteAdress + "SEQ" + requestSetup.CSeq.ToString(CultureInfo.InvariantCulture);
RtspTransport selectedTransport = SelectTransport(requestSetup);
// We do not handle asked transport so return directly.
if (selectedTransport == null)
{
_logger.Info("No transport asked are supported, sorry");
RtspResponse returnValue = requestSetup.CreateResponse();
// Unsupported transport;
returnValue.ReturnCode = 461;
destination = requestSetup.SourcePort;
return(returnValue);
}
UDPForwarder forwarder = new UDPForwarder();
forwarder.ToMulticast = selectedTransport.IsMulticast;
// this part of config is only valid in unicast.
if (!selectedTransport.IsMulticast)
{
forwarder.ForwardPortVideo = selectedTransport.ClientPort.First;
forwarder.SourcePortCommand = selectedTransport.ClientPort.Second;
// If the client did not set the destination.. get it from TCP source
if (!string.IsNullOrEmpty(selectedTransport.Destination))
{
forwarder.ForwardHostVideo = selectedTransport.Destination;
}
else
{
forwarder.ForwardHostVideo = requestSetup.SourcePort.RemoteAdress.Split(':')[0];
_logger.Debug("Destination get from TCP port {0}", forwarder.ForwardHostVideo);
}
}
// Configured the transport asked.
forwarder.ForwardHostCommand = destination.RemoteAdress.Split(':')[0];
RtspTransport firstNewTransport = new RtspTransport()
{
IsMulticast = false,
ClientPort = new PortCouple(forwarder.ListenVideoPort, forwarder.FromForwardCommandPort),
};
RtspTransport secondTransport = new RtspTransport()
{
IsMulticast = false,
LowerTransport = RtspTransport.LowerTransportType.TCP,
};
requestSetup.Headers[RtspHeaderNames.Transport] = firstNewTransport.ToString() + ", " + secondTransport.ToString();
requestSetup.Headers[RtspHeaderNames.Transport] = firstNewTransport.ToString();// +", " + secondTransport.ToString();
_setupForwarder.Add(setupKey, forwarder);
return(requestSetup);
}
// Process each RTSP message that is received
private void RTSP_Message_Received(object sender, RtspChunkEventArgs e)
{
// Cast the 'sender' and 'e' into the RTSP Listener (the Socket) and the RTSP Message
var listener = sender as RtspListener;
var message = e.Message as RtspMessage;
Console.WriteLine("RTSP message received " + message);
// Handle OPTIONS message
if (message is RtspRequestOptions)
{
// Create the reponse to OPTIONS
var options_response = (e.Message as RtspRequestOptions).CreateResponse();
listener.SendMessage(options_response);
}
// Handle DESCRIBE message
if (message is RtspRequestDescribe)
{
var requested_url = (message as RtspRequestDescribe).RtspUri.ToString();
Console.WriteLine("Request for " + requested_url);
// TODO. Check the requsted_url is valid. In this example we accept any RTSP URL
// Make the Base64 SPS and PPS
var raw_sps = h264_encoder.GetRawSPS(); // no 0x00 0x00 0x00 0x01 or 32 bit size header
var raw_pps = h264_encoder.GetRawPPS(); // no 0x00 0x00 0x00 0x01 or 32 bit size header
var sps_str = Convert.ToBase64String(raw_sps);
var pps_str = Convert.ToBase64String(raw_pps);
var sdp = new StringBuilder();
// Generate the SDP
// The sprop-parameter-sets provide the SPS and PPS for H264 video
// The packetization-mode defines the H264 over RTP payloads used but is Optional
sdp.Append("v=0\n");
sdp.Append("o=user 123 0 IN IP4 0.0.0.0\n");
sdp.Append("s=SharpRTSP Test Camera\n");
sdp.Append("m=video 0 RTP/AVP 96\n");
sdp.Append("c=IN IP4 0.0.0.0\n");
sdp.Append("a=control:trackID=0\n");
sdp.Append("a=rtpmap:96 H264/90000\n");
sdp.Append("a=fmtp:96 profile-level-id=42A01E; sprop-parameter-sets=" + sps_str + "," + pps_str + ";\n");
var sdp_bytes = Encoding.ASCII.GetBytes(sdp.ToString());
// Create the reponse to DESCRIBE
// This must include the Session Description Protocol (SDP)
var describe_response = (e.Message as RtspRequestDescribe).CreateResponse();
describe_response.AddHeader("Content-Base: " + requested_url);
describe_response.AddHeader("Content-Type: application/sdp");
describe_response.Data = sdp_bytes;
describe_response.AdjustContentLength();
listener.SendMessage(describe_response);
}
// Handle SETUP message
if (message is RtspRequestSetup)
{
//
var setupMessage = message as RtspRequestSetup;
// Check the RTSP transport
// If it is UDP or Multicast, create the sockets
// If it is RTP over RTSP we send data via the RTSP Listener
// FIXME client may send more than one possible transport.
// very rare
var transport = setupMessage.GetTransports()[0];
// Construct the Transport: reply from the Server to the client
var transport_reply = new RtspTransport();
if (transport.LowerTransport == RtspTransport.LowerTransportType.TCP)
{
// RTP over RTSP mode}
transport_reply.LowerTransport = RtspTransport.LowerTransportType.TCP;
transport_reply.Interleaved = new PortCouple(transport.Interleaved.First, transport.Interleaved.Second);
}
if (transport.LowerTransport == RtspTransport.LowerTransportType.UDP &&
transport.IsMulticast == false)
{
// RTP over UDP mode}
// Create a pair of UDP sockets
// Pass the Port of the two sockets back in the reply
transport_reply.LowerTransport = RtspTransport.LowerTransportType.UDP;
transport_reply.IsMulticast = false;
transport_reply.ClientPort = transport.ClientPort; // FIX
// for now until implemented
transport_reply = null;
}
if (transport.LowerTransport == RtspTransport.LowerTransportType.UDP &&
transport.IsMulticast)
{
// RTP over Multicast UDP mode}
// Create a pair of UDP sockets in Multicast Mode
// Pass the Ports of the two sockets back in the reply
transport_reply.LowerTransport = RtspTransport.LowerTransportType.UDP;
transport_reply.IsMulticast = true;
transport_reply.Port = new PortCouple(7000, 7001); // FIX
// for now until implemented
transport_reply = null;
}
if (transport_reply != null)
{
var new_session = new RTPSession();
new_session.listener = listener;
new_session.sequence_number = (UInt16)rnd.Next(65535); // start with a random 16 bit sequence number
new_session.ssrc = 1;
// Add the transports to the Session
new_session.client_transport = transport;
new_session.transport_reply = transport_reply;
lock (rtp_list)
{
// Create a 'Session' and add it to the Session List
// ToDo - Check the Track ID. In the SDP the H264 video track is TrackID 0
// Place Lock() here so the Session Count and the addition to the list is locked
new_session.session_id = session_count.ToString();
// Add the new session to the Sessions List
rtp_list.Add(new_session);
session_count++;
}
var setup_response = setupMessage.CreateResponse();
setup_response.Headers[RtspHeaderNames.Transport] = transport_reply.ToString();
setup_response.Session = new_session.session_id;
listener.SendMessage(setup_response);
}
else
{
var setup_response = setupMessage.CreateResponse();
// unsuported transport
setup_response.ReturnCode = 461;
listener.SendMessage(setup_response);
}
}
// Handle PLAY message
if (message is RtspRequestPlay)
{
lock (rtp_list)
{
// Search for the Session in the Sessions List. Change the state of "PLAY"
foreach (var session in rtp_list)
{
if (session.session_id.Equals(message.Session))
{
// found the session
session.play = true;
break;
}
}
}
// ToDo - only send back the OK response if the Session in the RTSP message was found
var play_response = (e.Message as RtspRequestPlay).CreateResponse();
listener.SendMessage(play_response);
}
// Handle PLAUSE message
if (message is RtspRequestPause)
{
lock (rtp_list)
{
// Search for the Session in the Sessions List. Change the state of "PLAY"
foreach (var session in rtp_list)
{
if (session.session_id.Equals(message.Session))
{
// found the session
session.play = false;
break;
}
}
}
// ToDo - only send back the OK response if the Session in the RTSP message was found
var pause_response = (e.Message as RtspRequestPause).CreateResponse();
listener.SendMessage(pause_response);
}
// Handle GET_PARAMETER message, often used as a Keep Alive
if (message is RtspRequestGetParameter)
{
// Create the reponse to GET_PARAMETER
var getparameter_response = (e.Message as RtspRequestGetParameter).CreateResponse();
listener.SendMessage(getparameter_response);
}
// Handle TEARDOWN
if (message is RtspRequestTeardown)
{
lock (rtp_list)
{
// Search for the Session in the Sessions List.
foreach (var session in rtp_list.ToArray()) // Convert to ToArray so we can delete from the rtp_list
{
if (session.session_id.Equals(message.Session))
{
// TODO - Close UDP or Multicast transport
// For TCP there is no transport to close
rtp_list.Remove(session);
// Close the RTSP socket
listener.Dispose();
}
}
}
}
}
public void ToStringUDPUnicast()
{
RtspTransport transport = new RtspTransport()
{
LowerTransport = RtspTransport.LowerTransportType.UDP,
IsMulticast = false,
ClientPort = new PortCouple(5000, 5001),
ServerPort = new PortCouple(5002, 5003),
Destination = "1.2.3.4"
};
Assert.AreEqual("RTP/AVP/UDP;unicast;destination=1.2.3.4;client_port=5000-5001;server_port=5002-5003", transport.ToString());
}