attaching crystal report to a remote database server

The client program should not register this server as a computer running Kazaa, because it sends a reply. When you send a weird string to an instance of Kazaa running on port 1214, it immediately disconnects you. Hence, if you get a response, it is not Kazaa you connected to.

Here is the code I wrote for the fake Kazaa server:

FakeKazaa.cs

/////////////////////////////////////////////////////////////////////////////////////////

// A useless server to sit on port 1214 and wait for a connection, to fake the existance

// of Kazaa.

// I will attempt to make the client program realize it is fake, and not identify this

// server as Kazaa.

// Jim Peterson, 2006

/////////////////////////////////////////////////////////////////////////////////////////

using System;

using System.Text;

using System.Net;

using System.Net.Sockets;

public class FakeKazza

{

    public static void Main()

    {

        String IP_Adress = "";

        IPHostEntry localComputer = Dns.Resolve("localhost");

        IPAddress[] localIP = localComputer.AddressList;

        for (int i = 0; i < localIP.Length; i++) {

            IP_Adress = IP_Adress + localIP[i];

        }

        while (true) {

            try {

                IPAddress ipAd = IPAddress.Parse(IP_Adress);

                TcpListener listener1 = new TcpListener(ipAd, 1214);

                listener1.Start();

                Console.WriteLine("Fake Kazaa is running on portt 1214...");

                Socket s = listener1.AcceptSocket();

                Console.WriteLine("Connection accepted from this IP: " + s.RemoteEndPoint);

                byte[] b = new byte[100];

                int k = s.Receive(b);

                Console.WriteLine("Recieved a bunch of byytes:");

                    for (int i = 0; i < k; i++) {

                       Console.Write(Convert.ToChar(b[i]));

                    }

                ASCIIEncoding asen = new ASCIIEncoding();

                // Only send these bytes if you want the scanner to identify that

                // you are not Kazaa

                s.Send(asen.GetBytes("OK, I recieved your bytes"));

                Console.WriteLine("\nI sent the client aknowledgement");

                s.Close();

                listener1.Stop();

            }

            catch (Exception e) {

                Console.WriteLine("Ah, poo, an error: " + e);

            }

        }

    }

}

So, when we run the server, and then tell the client to scan "localhost", we should get the output:

The target is NOT running Kazaa.

Good! It works. Try commenting this line out of the server code:

s.Send(asen.GetBytes("OK, I recieved your bytes"));

And the result should be that the target is indeed running Kazaa.