socket communication over content switch

[jrayasam]

Hi,

I have a simple client server application which communicates through sockets. There is a content switch in between client and server that routes the request to a proper server machine. This content switch pings the server machines every 5 millisec to check the heartbeat. My server app is raising an System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> whenever the content switch is pinging and is trying to read the stream.

Inorder to avoid this I have used networkstream.dataavailable to check if there is request from the client or if it is just a ping from the contentswitch. But the networkstream.dataavailable is returning false even if there is data or a true request from true client. I can't use the IP to differentiate between contentswitch and actual client because the ip's are masked. How would I get rid of the I/O exception and read data when available.



My code snippet:

private void ProcessRequest(object param)

{

Socket inSocket = (Socket)param;

if (inSocket.Connected)

{

string clientIP = IPAddress.Parse(((IPEndPoint)inSocket.RemoteEndPoi nt).Address.ToString()).ToString();

NetworkStream networkStream = null;

System.IO.StreamWriter streamWriter = null;

System.IO.StreamReader streamReader = null;

try

{

networkStream = new NetworkStream(inSocket);

streamWriter = new System.IO.StreamWriter(networkStream);

streamReader = new System.IO.StreamReader(networkStream);

// Read data.



if (!networkStream.DataAvailable)

return; ---- This is always returning false. even if data is present. why is that so?



string line = streamReader.ReadLine();

//Parse data

..


//Report result back to the client

streamWriter.WriteLine((int)ret);

streamWriter.Flush();

}

catch (Exception ex)

{

Logger.write(ex.message.tostring());

}

finally

{

if (streamWriter != null) streamWriter.Close();

if (streamReader != null) streamReader.Close();

if (networkStream != null) networkStream.Close();

inSocket.Close();

}

}



Any help would be greatly appreciated. Thanks