import java.io.IOException;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.MulticastSocket;

public class VoteMulticastSender {

  public static final int CANDIDATEID = 475;
  
  public static void main(String args[]) throws IOException {

    if ((args.length < 2) || (args.length > 3)) { // Test # of args
      throw new IllegalArgumentException("Parameter(s): <Multicast Addr> <Port> [<TTL>]");
    }

    InetAddress destAddr = InetAddress.getByName(args[0]); // Destination
    if (!destAddr.isMulticastAddress()) { // Test if multicast address
      throw new IllegalArgumentException("Not a multicast address");
    }

    int destPort = Integer.parseInt(args[1]); // Destination port
    int TTL = (args.length == 3) ? Integer.parseInt(args[2]) : 1; // Set TTL

    MulticastSocket sock = new MulticastSocket();
    sock.setTimeToLive(TTL); // Set TTL for all datagrams
    
    VoteMsgCoder coder = new VoteMsgTextCoder();
    
    VoteMsg vote = new VoteMsg(true, true, CANDIDATEID, 1000001L);

    // Create and send a datagram
    byte[] msg = coder.toWire(vote);
    DatagramPacket message = new DatagramPacket(msg, msg.length, destAddr, destPort);
    System.out.println("Sending Text-Encoded Request (" + msg.length + " bytes): ");
    System.out.println(vote);
    sock.send(message);

    sock.close();
  }
}