Portscanning for Kazaa using C# Sockets

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

// 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);

}

}

}

}