internal RtspResponse HandleSetup(RtspRequestSetup request)
{
Contract.Requires(request != null);
Contract.Ensures(Contract.Result <RtspResponse>() != null);
var response = request.CreateResponse();
if (string.IsNullOrEmpty(response.Session))
{
// TODO Allocate a real session ID
response.Session = sessionGenerator.Next().ToString();
}
RtspPushDescription description;
if (!PushDescriptions.TryGetValue(request.RtspUri.AbsolutePath, out description))
{
response.ReturnCode = 404;
return(response);
}
bool configok = false;
foreach (var transport in request.GetTransports())
{
if (transport.LowerTransport == RtspTransport.LowerTransportType.UDP &&
!transport.IsMulticast
)
{
var forwarder = new UDPForwarder();
description.AddForwarders(response.Session, request.RtspUri.AbsolutePath, forwarder);
transport.ServerPort = new PortCouple(forwarder.ListenVideoPort);
response.Headers[RtspHeaderNames.Transport] = transport.ToString();
configok = true;
}
}
if (!configok)
{
response.ReturnCode = 461;
}
return(response);
}
/// <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();
_setupForwarder.Add(setupKey, forwarder);
return requestSetup;
}
/// <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>
/// 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);
}
