/// <summary>
/// Callback method for asynchronous read
/// </summary>
/// <param name="ar"></param>
public void ReadCallBack(IAsyncResult ar)
{
TcpState tcpState = (TcpState)ar.AsyncState;
NetworkStream networkStream = tcpState.NetworkStream;
try
{
int bytesRead = networkStream.EndRead(ar);
if (bytesRead > 0)
{
// Send back received date
byte[] receivedData = new byte[bytesRead];
Array.Copy(tcpState.DataBuffer, receivedData, bytesRead);
networkStream.Write(receivedData, 0, receivedData.Length);
// Raise event
if (OnDataReceived != null)
{
OnDataReceived(receivedData);
}
// Reset timeouut watch
tcpState.TimeoutWatch = DateTime.Now;
networkStream.BeginRead(tcpState.DataBuffer, 0, tcpState.DataBuffer.Length, new AsyncCallback(ReadCallBack), tcpState);
}
else
{
// We are hooked in CLOSE_WAIT state, so close
tcpClient.Client.Close();
}
}
catch (IOException ioException)
{
// Rethrow every exception that is not socketException
if (ioException.InnerException.GetType() == typeof(SocketException))
{
SocketException socketException = (SocketException)ioException.InnerException;
// Report every error but ConnectionReset
if (socketException.SocketErrorCode != SocketError.ConnectionReset && OnSocketException != null)
{
OnSocketException(socketException);
Stop();
}
}
else if (ioException.InnerException.GetType() != typeof(ObjectDisposedException))
{
throw ioException;
}
}
}
/// <summary>
/// Main thread method
/// </summary>
private void ServerThread()
{
try
{
// Start listening
tcpListener.Start();
// Main loop
while (serverRunning)
{
tcpClient = tcpListener.AcceptTcpClient();
// Raise event when client is connected
if (OnConnect != null)
{
OnConnect(tcpClient.Client.RemoteEndPoint);
}
// Start exchanging the data when client is connected
if (tcpClient != null && tcpClient.Client.Connected)
{
// Init state object
TcpState tcpState = new TcpState();
tcpState.NetworkStream = new NetworkStream(tcpClient.Client);
tcpState.DataBuffer = new byte[tcpClient.ReceiveBufferSize];
tcpState.TimeoutWatch = DateTime.Now;
tcpState.NetworkStream.BeginRead(tcpState.DataBuffer, 0, tcpState.DataBuffer.Length, new AsyncCallback(ReadCallBack), tcpState);
bool timeOut = false;
while (tcpClient.Client.Connected && serverRunning && !timeOut)
{
TimeSpan timeoutSpan = DateTime.Now - tcpState.TimeoutWatch;
if (timeoutSpan.Seconds >= ConnectionTimeout)
{
timeOut = true;
}
}
// Raise disconnect event
if (OnDisconnect != null)
{
OnDisconnect(timeOut);
}
tcpClient.Close();
}
}
}
catch (SocketException socketException)
{
// Report every error but Interrupted, thrown by tcpListener when stopping the server
if (socketException.SocketErrorCode != SocketError.Interrupted && OnSocketException != null)
{
OnSocketException(socketException);
Stop();
}
}
Stop();
}
