/// <summary>
/// Handles the response to a setup message.
/// </summary>
/// <param name="message">A response message.</param>
private void HandleResponseToSetup(RtspResponse message)
{
RtspRequest original = message.OriginalRequest;
string setupKey = original.SourcePort.RemoteAdress + "SEQ" + message.CSeq.ToString(CultureInfo.InvariantCulture);
if (message.IsOk)
{
Forwarder forwarder = ConfigureTransportAndForwarder(message, _setupForwarder[setupKey]);
RtspSession newSession;
string sessionKey = RtspSession.GetSessionName(original.RtspUri, message.Session);
if (_activesSession.ContainsKey(sessionKey))
{
newSession = _activesSession[sessionKey];
_logger.Info("There was an already a session with ths ID {0}", newSession.Name);
}
else
{
_logger.Info("Create a new session with the ID {0}", sessionKey);
newSession = new RtspSession();
newSession.Name = message.Session;
newSession.Destination = original.RtspUri.Authority;
_activesSession.Add(sessionKey, newSession);
}
newSession.AddForwarder(original.RtspUri, forwarder);
newSession.Timeout = message.Timeout;
}
// No needed here anymore.
_setupForwarder.Remove(setupKey);
}
/// <summary>
/// Handles the request play.
/// Do not forward message if already playing
/// </summary>
/// <param name="destination">The destination.</param>
/// <param name="requestPlay">The request play.</param>
/// <returns>The message to transmit</returns>
private RtspMessage HandleRequestPlay(ref RtspListener destination, RtspRequestPlay requestPlay)
{
Contract.Requires(requestPlay != null);
Contract.Requires(destination != null);
Contract.Ensures(Contract.Result <RtspMessage>() != null);
Contract.Ensures(Contract.ValueAtReturn(out destination) != null);
string sessionKey = RtspSession.GetSessionName(requestPlay.RtspUri, requestPlay.Session);
if (_activesSession.ContainsKey(sessionKey))
{
RtspSession session = _activesSession[sessionKey];
// si on est dèjà en play on n'envoie pas la commande a la source.
if (session.State == RtspSession.SessionState.Playing)
{
session.Start(requestPlay.SourcePort.RemoteAdress);
RtspResponse returnValue = requestPlay.CreateResponse();
destination = requestPlay.SourcePort;
return(returnValue);
}
// ajoute un client
session.Start(requestPlay.SourcePort.RemoteAdress);
}
return(requestPlay);
}
/// <summary>
/// Updates the state of the session.
/// </summary>
/// <param name="message">A response message.</param>
private void UpdateSessionState(RtspResponse message)
{
// if no session can be found
if (message.OriginalRequest == null ||
(message.Session == null && message.OriginalRequest.Session == null) ||
message.OriginalRequest.RtspUri == null)
{
return;
}
// voir a mettre dans la message....
string curentSession = message.Session != null ? message.Session : message.OriginalRequest.Session;
//Update session state and handle special message
string sessionKey = RtspSession.GetSessionName(message.OriginalRequest.RtspUri, curentSession);
if (_activesSession.ContainsKey(sessionKey))
{
if (message.ReturnCode >= 300 && message.ReturnCode < 400)
{
_activesSession[sessionKey].State = RtspSession.SessionState.Init;
}
else if (message.ReturnCode < 300)
{
switch (message.OriginalRequest.RequestTyped)
{
case RtspRequest.RequestType.SETUP:
if (_activesSession[sessionKey].State == RtspSession.SessionState.Init)
{
_activesSession[sessionKey].State = RtspSession.SessionState.Ready;
}
break;
case RtspRequest.RequestType.PLAY:
if (_activesSession[sessionKey].State == RtspSession.SessionState.Ready)
{
_activesSession[sessionKey].State = RtspSession.SessionState.Playing;
}
break;
case RtspRequest.RequestType.RECORD:
if (_activesSession[sessionKey].State == RtspSession.SessionState.Ready)
{
_activesSession[sessionKey].State = RtspSession.SessionState.Recording;
}
break;
case RtspRequest.RequestType.PAUSE:
if (_activesSession[sessionKey].State == RtspSession.SessionState.Playing ||
_activesSession[sessionKey].State == RtspSession.SessionState.Recording)
{
_activesSession[sessionKey].State = RtspSession.SessionState.Ready;
}
break;
case RtspRequest.RequestType.TEARDOWN:
_activesSession[sessionKey].State = RtspSession.SessionState.Init;
break;
}
}
}
else
{
_logger.Warn("Command {0} for session {1} which was not found", message.OriginalRequest.RequestTyped, sessionKey);
}
}
/// <summary>
/// Handles request message.
/// </summary>
/// <param name="message">A message, can be rewriten.</param>
/// <returns>The destination</returns>
private RtspListener HandleRequest(ref RtspMessage message)
{
Contract.Requires(message != null);
Contract.Requires(message is RtspRequest);
Contract.Ensures(Contract.Result <RtspListener>() != null);
Contract.Ensures(Contract.ValueAtReturn(out message) != null);
RtspRequest request = message as RtspRequest;
RtspListener destination;
// Do not forward, direct respond because we do not know where to send.
if (request.RtspUri == null || request.RtspUri.AbsolutePath.Split(new char[] { '/' }, 3).Length < 3)
{
destination = HandleRequestWithoutUrl(ref message);
}
else
{
try
{
// get the real destination
request.RtspUri = RewriteUri(request.RtspUri);
destination = GetRtspListenerForDestination(request.RtspUri);
// Handle setup
RtspRequestSetup requestSetup = request as RtspRequestSetup;
if (requestSetup != null)
{
message = HandleRequestSetup(ref destination, requestSetup);
}
//Handle Play Reques
RtspRequestPlay requestPlay = request as RtspRequestPlay;
if (requestPlay != null)
{
message = HandleRequestPlay(ref destination, requestPlay);
}
//Update session state and handle special message
if (request.Session != null && request.RtspUri != null)
{
string sessionKey = RtspSession.GetSessionName(request.RtspUri, request.Session);
if (_activesSession.ContainsKey(sessionKey))
{
_activesSession[sessionKey].Handle(request);
switch (request.RequestTyped)
{
// start here to start early
//case RtspRequest.RequestType.PLAY:
// _activesSession[sessionKey].Start(request.SourcePort.RemoteAdress);
// break;
case RtspRequest.RequestType.TEARDOWN:
_activesSession[sessionKey].Stop(request.SourcePort.RemoteAdress);
if (!_activesSession[sessionKey].IsNeeded)
{
_activesSession.Remove(sessionKey);
}
else
{
// system still need the server to send data do not send him the message.
// reponds to client directly.
destination = request.SourcePort;
message = request.CreateResponse();
}
break;
}
}
else
{
_logger.Warn("Command {0} for session {1} which was not found", request.RequestTyped, sessionKey);
}
}
}
catch (Exception error)
{
_logger.Error("Error during handle of request", error);
destination = request.SourcePort;
RtspResponse theDirectResponse = request.CreateResponse();
theDirectResponse.ReturnCode = 500;
message = theDirectResponse;
}
}
return(destination);
}
