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.IOExc eption: 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.d ataavailable to check if there is request from the client or if it is just a ping from the contentswitch. But the networkstream.d ataavailable 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.Conne cted)

{

string clientIP = IPAddress.Parse (((IPEndPoint)i nSocket.RemoteE ndPoint).Addres s.ToString()).T oString();

NetworkStream networkStream = null;

System.IO.Strea mWriter streamWriter = null;

System.IO.Strea mReader streamReader = null;

try

{

networkStream = new NetworkStream(i nSocket);

streamWriter = new System.IO.Strea mWriter(network Stream);

streamReader = new System.IO.Strea mReader(network Stream);

// Read data.



if (!networkStream .DataAvailable)

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



string line = streamReader.Re adLine();

//Parse data

..


//Report result back to the client

streamWriter.Wr iteLine((int)re t);

streamWriter.Fl ush();

}

catch (Exception ex)

{

Logger.write(ex .message.tostri ng());

}

finally

{

if (streamWriter != null) streamWriter.Cl ose();

if (streamReader != null) streamReader.Cl ose();

if (networkStream != null) networkStream.C lose();

inSocket.Close( );

}

}



Any help would be greatly appreciated. Thanks