internal void UnmarkAllASDUs()
{
if (asduQueue != null)
{
asduQueue.UnmarkAllASDUs();
}
}
private void HandleConnection()
{
byte[] bytes = new byte[300];
try
{
try
{
running = true;
if (tlsSecInfo != null)
{
DebugLog("Setup TLS");
RemoteCertificateValidationCallback validationCallback = CertificateValidationCallback;
if (tlsSecInfo.CertificateValidationCallback != null)
{
validationCallback = tlsSecInfo.CertificateValidationCallback;
}
SslStream sslStream = new SslStream(socketStream, true, validationCallback);
bool authenticationSuccess = false;
try
{
sslStream.AuthenticateAsServer(tlsSecInfo.OwnCertificate, true, System.Security.Authentication.SslProtocols.Tls, false);
if (sslStream.IsAuthenticated == true)
{
socketStream = sslStream;
authenticationSuccess = true;
}
}
catch (IOException e)
{
if (e.GetBaseException() != null)
{
DebugLog("TLS authentication error: " + e.GetBaseException().Message);
}
else
{
DebugLog("TLS authentication error: " + e.Message);
}
}
if (authenticationSuccess == true)
{
socketStream = sslStream;
}
else
{
DebugLog("TLS authentication failed");
running = false;
}
}
if (running)
{
socketStream.ReadTimeout = 50;
callbackThread = new Thread(ProcessASDUs);
callbackThread.Start();
ResetT3Timeout();
}
while (running)
{
try
{
// Receive the response from the remote device.
int bytesRec = receiveMessage(bytes);
if (bytesRec > 0)
{
DebugLog("RCVD: " + BitConverter.ToString(bytes, 0, bytesRec));
if (HandleMessage(bytes, bytesRec) == false)
{
/* close connection on error */
running = false;
}
if (unconfirmedReceivedIMessages >= apciParameters.W)
{
lastConfirmationTime = SystemUtils.currentTimeMillis();
unconfirmedReceivedIMessages = 0;
timeoutT2Triggered = false;
SendSMessage();
}
}
else if (bytesRec == -1)
{
running = false;
}
}
catch (System.IO.IOException)
{
running = false;
}
if (fileServer != null)
{
fileServer.HandleFileTransmission();
}
if (handleTimeouts() == false)
{
running = false;
}
if (running)
{
if (isActive)
{
SendWaitingASDUs();
}
Thread.Sleep(1);
}
}
isActive = false;
DebugLog("CLOSE CONNECTION!");
// Release the socket.
socket.Shutdown(SocketShutdown.Both);
socket.Close();
socketStream.Dispose();
socket.Dispose();
DebugLog("CONNECTION CLOSED!");
}
catch (ArgumentNullException ane)
{
DebugLog("ArgumentNullException : " + ane.ToString());
}
catch (SocketException se)
{
DebugLog("SocketException : " + se.ToString());
}
catch (Exception e)
{
DebugLog("Unexpected exception : " + e.ToString());
}
}
catch (Exception e)
{
DebugLog(e.ToString());
}
// unmark unconfirmed messages in queue if k-buffer not empty
if (oldestSentASDU != -1)
{
asduQueue.UnmarkAllASDUs();
}
server.Remove(this);
if (callbackThreadRunning)
{
callbackThreadRunning = false;
callbackThread.Join();
}
DebugLog("Connection thread finished");
}