//******************************************************************//
// Remove a connection to the list of connections in a threadsafe //
// way. //
//******************************************************************//
public void RemoveConnection(ThreadConnection connection)
{
//*******************************************************//
// To assist with debugging only wait one second (which //
// is a loooong time) and log a console message if timed //
// out. //
//*******************************************************//
bool timedOut = !sem.WaitOne(1000);
if (timedOut)
{
Console.WriteLine("Wait timed out removing connection");
}
listConnections.Remove(connection);
try
{
sem.Release();
}
catch (Exception e) { }
Console.Write("Object removed from list of connections. List now contains ");
Console.Write(listConnections.Count);
Console.WriteLine(" connections.");
}
//******************************************************************//
// Add a new connection to the list of connections in a threadsafe //
// way. //
//******************************************************************//
public void AddConnection(ThreadConnection newConnection)
{
//*******************************************************//
// To assist with debugging only wait one second (which //
// is a loooong time) and log a console message if timed //
// out. //
//*******************************************************//
bool timedOut = sem.WaitOne(1000);
if (timedOut)
{
Console.WriteLine("Wait timed out adding new connection");
}
listConnections.Add(newConnection);
sem.Release();
}
//******************************************************************//
// Start the sort of proxy. //
//******************************************************************//
private void StartProxy()
{
//**************************************************************//
// Try to create a listening socket. //
//**************************************************************//
try
{
listeningSocket = new TcpListener(System.Net.IPAddress.Any, port);
listeningSocket.Start();
Console.WriteLine("Listening socket started"); //Why don't these echo!
}
catch (Exception ee)
{
Console.WriteLine(ee.Message, "Error opening listening socket");
return;
}
//**************************************************************//
// This next bit just prints out the IP address and the host. //
// There must be a neater way to do this - Nigel. //
//**************************************************************//
Console.Out.WriteLine("Listener running");
localHostInfo = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());
foreach (IPAddress address in localHostInfo.AddressList)
{
Console.WriteLine("I have Ip address " + address.ToString());
}
//**************************************************************//
// Sit and wait until something attempts to connect to us. //
// //
// We block (i.e. wait) on the listeningSocket.AcceptSocket(); //
// When it does, we get passed a new connection. //
// //
// This run() method (I have called it run() to make C# look //
// like Java) You will find that this form (Thread) won't //
// respond wo any Windows events (try it), as it is blocking in //
// the code below. //
//**************************************************************//
while (true)
{
connection = listeningSocket.AcceptSocket();
//***********************************************************//
//We have now accepted a connection. //
// //
//There are several ways to do this next bit. Here I make a//
//network stream and use it to create two other streams, an //
//input and an output stream. Life gets easier at that //
//point. //
//***********************************************************//
ThreadConnection threadConnection = new ThreadConnection(connection, this);
//***********************************************************//
// Create a new Thread to manage the connection that receives//
// data. If you are a Java programmer, this looks like a //
// load of hokum cokum.. //
//***********************************************************//
Thread threadRunner = new Thread(new ThreadStart(threadConnection.run));
threadRunner.Start();
Console.WriteLine("Created new connection class");
}
}
