import java.net.*;
import java.io.*;

public class UDPDiscardClient {

  public final static int DEFAULT_PORT = 9;

  public static void main(String[] args) {

    String hostname;
    int port = DEFAULT_PORT;

    if (args.length > 0) {
      hostname = args[0];
      try {
      	port = Integer.parseInt(args[1]);
      }
      catch (Exception ex) {
        // use default port
      }
    }
    else {
      hostname = "localhost";
    }

    try {
      InetAddress server = InetAddress.getByName(hostname);
      BufferedReader userInput 
       = new BufferedReader(new InputStreamReader(System.in));
      DatagramSocket theSocket = new DatagramSocket();
      while (true) {
        String theLine = userInput.readLine();
        if (theLine.equals(".")) break;
        byte[] data = theLine.getBytes();
        DatagramPacket theOutput 
         = new DatagramPacket(data, data.length, server, port);
        theSocket.send(theOutput);
      }  // end while
    }  // end try
    catch (UnknownHostException uhex) {
      System.err.println(uhex);
    }  
    catch (SocketException sex) {
      System.err.println(sex);
    }
    catch (IOException ioex) {
      System.err.println(ioex);
    }

  }  // end main

}