/// <summary>
/// Sends a Rtsp Response on the given client session
/// </summary>
/// <param name="message">The RtspResponse to send</param> If this was byte[] then it could handle http
/// <param name="ci">The session to send the response on</param>
internal void ProcessSendRtspMessage(RtspMessage message, ClientSession session, bool sendResponse = true)
{
//Todo have a SupportedFeatures and RequiredFeatures HashSet.
//Check Require Header
// And
/* Add Unsupported Header if needed
Require: play.basic, con.persistent
(basic play, TCP is supported)
setup.playing means that setup and teardown can be used in the play state.
*/
//If we have a session
if (session == null || session.IsDisposed) return;
try
{
//if there is a message to send
if (message != null && false == message.IsDisposed)
{
//AddServerHeaders()->
if (false == message.ContainsHeader(RtspHeaders.Server)) message.SetHeader(RtspHeaders.Server, ServerName);
if (false == message.ContainsHeader(RtspHeaders.Date)) message.SetHeader(RtspHeaders.Date, DateTime.UtcNow.ToString("r"));
#region RFC2326 12.38 Timestamp / Delay
/*
12.38 Timestamp
The timestamp general header describes when the client sent the
request to the server. The value of the timestamp is of significance
only to the client and may use any timescale. The server MUST echo
the exact same value and MAY, if it has accurate information about
this, add a floating point number indicating the number of seconds
that has elapsed since it has received the request. The timestamp is
used by the client to compute the round-trip time to the server so
that it can adjust the timeout value for retransmissions.
Timestamp = "Timestamp" ":" *(DIGIT) [ "." *(DIGIT) ] [ delay ]
delay = *(DIGIT) [ "." *(DIGIT) ]
*/
if (false == message.ContainsHeader(RtspHeaders.Timestamp)
&&
session.LastRequest != null
&&
session.LastRequest.ContainsHeader(RtspHeaders.Timestamp))
{
////Apparently not joined with ;
////message.SetHeader(RtspHeaders.Timestamp, session.LastRequest[RtspHeaders.Timestamp] + "delay=" + (DateTime.UtcNow - session.LastRequest.Created).TotalSeconds);
//Set the value of the Timestamp header as given
message.AppendOrSetHeader(RtspHeaders.Timestamp, session.LastRequest[RtspHeaders.Timestamp]);
//Add a delay datum
message.AppendOrSetHeader(RtspHeaders.Timestamp, "delay=" + (DateTime.UtcNow - session.LastRequest.Created).TotalSeconds);
}
#endregion
string sess = message.GetHeader(RtspHeaders.Session);
//Check for a session header
if (false == string.IsNullOrWhiteSpace(sess))
{
//Add the timeout header if there was a session header.
if (RtspClientInactivityTimeout > TimeSpan.Zero && false == sess.Contains("timeout")) message.AppendOrSetHeader(RtspHeaders.Session, "timeout=" + (int)(RtspClientInactivityTimeout.TotalSeconds / 2));
}
//Oops
//if (session.m_RtspSocket.ProtocolType == ProtocolType.Tcp && session.Attached.Count > 0) response.SetHeader("Ignore", "$0\09\r\n$\0:\0");
//Dispose the last response
if (session.LastResponse != null) session.LastResponse.Dispose();
//Todo
//Content-Encoding should be the same as the request's if possible..
//If sending a response
if (sendResponse)
{
//Log response
if (Logger != null) Logger.LogResponse(message, session);
session.SendRtspData((session.LastResponse = message).ToBytes());
}//Otherwise just update the property
else session.LastResponse = message;
//Indicate the session is not disconnected
session.IsDisconnected = false;
//Indicate the last response was sent now.
session.LastResponse.Transferred = DateTime.UtcNow;
}
else
{
//Test the connectivity and start another receive
session.SendRtspData(Media.Common.MemorySegment.EmptyBytes);
}
}
catch (Exception ex)
{
if (Logger != null) Logger.LogException(ex);
//if a socket exception occured then handle it.
if (session != null && ex is SocketException) HandleClientSocketException((SocketException)ex, session);
}
}
internal void ProcessClientBuffer(ClientSession session, int received)
{
if (session == null || session.IsDisposed || received <= 0) return;
try
{
//Use a segment around the data received which is already in the buffer.
using (Common.MemorySegment data = new Common.MemorySegment(session.m_Buffer.Array, session.m_Buffer.Offset, received))
{
if (data[0] == RtpClient.BigEndianFrameControl)
{
if (session.m_RtpClient == null) return;
received -= session.m_RtpClient.ProcessFrameData(session.m_Buffer.Array, session.m_Buffer.Offset, received, session.m_RtspSocket);
}
if (received <= 0) return;
//Ensure the message is really Rtsp
RtspMessage request = new RtspMessage(data);
//Check for validity
if (request.MessageType != RtspMessageType.Invalid)
{
//Process the request when complete
if (request.IsComplete)
{
ProcessRtspRequest(request, session);
return;
}
} //Otherwise if LastRequest is not disposed then attempt completion with the invalid data
else if (session.LastRequest != null && false == session.LastRequest.IsDisposed)
{
//Indicate a CompleteFrom is occuring
Media.Common.ILoggingExtensions.Log(Logger, "Session:" + session.Id + " Attempting to complete previous mesage with buffer of " + data.Count + " bytes.");
//Attempt to complete it
received = session.LastRequest.CompleteFrom(null, data);
//If nothing was recieved then do nothing.
if (received == 0)
{
Media.Common.ILoggingExtensions.Log(Logger, "Session:" + session.Id + "Did not use buffer of " + data.Count + " bytes.");
//return;
}
Media.Common.ILoggingExtensions.Log(Logger, "Session:" + session.Id + " used " + received + " of buffer bytes");
//Account for the received data
session.m_Receieved += received;
//Determine how to process the messge
switch (session.LastRequest.MessageType)
{
case RtspMessageType.Response:
case RtspMessageType.Invalid:
{
//Ensure the session is still connected.
session.SendRtspData(Media.Common.MemorySegment.EmptyBytes);
return;
}
case RtspMessageType.Request:
{
//If the request is complete now then process it
if (session.LastRequest.IsComplete)
{
//Process the request (it may not be complete yet)
ProcessRtspRequest(session.LastRequest, session);
return;
}
goto case RtspMessageType.Invalid;
}
}
}
//Log the invalid request
Media.Common.ILoggingExtensions.Log(Logger, "Received Invalid Message:" + request + " \r\nFor Session:" + session.Id);
if (session.LastRequest != null) session.LastRequest.Dispose();
//Store it for now to allow completion.
session.LastRequest = request;
//Ensure the session is still connected.
session.SendRtspData(Media.Common.MemorySegment.EmptyBytes);
}
}
catch(Exception ex)
{
if (Logger != null) Logger.LogException(ex);
}
}
