Closing Socket while not yet connected

[FragMagnet]

Hi all,

I've run into a bit of a snag while dealing with asynchronous sockets. What I'm trying to do is set a timeout for which the server will listen for a connection from a client, at which point the object maintaining the server side connection will be disposed of through the use of a delegate.

The code is as follows:

public Bridge(string[] args, int inPort)
        {
            name = args[0];
            surname = args[1];
            password = args[2];

            // Sort out network related initialization
            port = inPort;
            
            Logger.Log("Bridge #" + port.ToString() + ": Initializing.", Helpers.LogLevel.Info);
            mainSock = new Socket(AddressFamily.InterNetwork,
                                  SocketType.Stream,
                                  ProtocolType.Tcp);
            IPEndPoint ipLocal = new IPEndPoint(IPAddress.Any, port);
            mainSock.Bind(ipLocal);
            mainSock.Listen(3);

            // Socket is initialized here
            mainSock.BeginAccept(new AsyncCallback(OnRequest),null);

            timer = new Timer(new TimerCallback(OnTimeout), null, 5000, Timeout.Infinite);

            Logger.Log("Bridge #" + port.ToString() + ": Completed Initialization successfully; waiting for client request.", Helpers.LogLevel.Info);
        }

        private void OnRequest(IAsyncResult result)
        {
            Logger.Log("Bridge #" + port.ToString() + ": Socket request received.", Helpers.LogLevel.Info);
            timer.Dispose();

            // Error gets thrown here after OnTimeout is triggered
            mainSock = mainSock.EndAccept(result);

            inClient = new Client((String[])Tools.ToArray(name, surname, password));

            // bind callback handlers for connections and disconnections of inClient
            inClient.Network.OnLogin += new NetworkManager.LoginCallback(ConnectionHandler);
            inClient.Network.OnDisconnected += new NetworkManager.DisconnectedCallback(DisconnectHandler);
            inClient.Self.OnChat += new AgentManager.ChatCallback(ChatHandler);

            // wait for connection signal 
        }

        private void OnTimeout(Object stateInfo)
        {
            Logger.Log("Bridge #" + port.ToString() + ": Connection timed out.", Helpers.LogLevel.Error);

            // Problem lies here
            mainSock.Close();

            timer.Dispose();
            OnBridgeTerm(port - portOffset);
        }

OnBridgeTerm is an event delegate that signals its owner class to destroy it, but of course resources have to be dealt with beforehand. Unfortunately, the timeout is there to remove the socket in the situation that it has not yet established a connection, and for this I can't seem to find the right method to get rid of it.

When using Close, I find that no errors are thrown, however, once OnTimeout finishes executing, OnRequest is instantly triggered even though the client clearly has not sent a connection request at all (that code is disabled).

What is the proper way to dispose of this pending socket? Am I even setting up the connection properly to begin with?