package Courses.CCN.Prog_Assn1;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;

public class PingClient {

	/**
	 * Client to send pings to a port
	 * @throws SocketException
	 */
	public static void main(String[] args) throws SocketException {
		if (args.length != 2) {
	         System.out.println("Required arguments: <host-name> <port-number>");
	         return;
	      }

		InetAddress address = null;
		try {
			address = InetAddress.getByName(args[0]);
		} catch (UnknownHostException e) {
			System.out.println("Hostname resolution error.");
			e.printStackTrace();
		}
		int port = Integer.parseInt(args[1]);

		System.out.println(address);
		System.out.println(port);

		DatagramPacket packet = new DatagramPacket(new byte[128], 128, address, port);
		DatagramSocket clientSocket = new DatagramSocket();

		for(int i = 0; i <= 9; i++) {
			try {
				clientSocket.send(packet);
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

}