SDIS1819-T4G10

import java.io.IOException;

import java.net.DatagramPacket;

import java.net.InetAddress;

import java.net.MulticastSocket;

import java.net.UnknownHostException;

public class Channel implements Runnable{

        protected MulticastSocket socket = null;

    protected byte[] buf = new byte[64000];

    private String IP;

    private int Port;

    private Peer peer;

    public Channel(String mcIP,int mcPort, Peer peer) {

            this.IP = mcIP;

            this.Port = mcPort;

            this.peer = peer;

    }

    public void run() {

            try{

                    this.socket = new MulticastSocket(this.Port);

        InetAddress group = InetAddress.getByName(this.IP);

        this.socket.joinGroup(group);

        while (true) {

            DatagramPacket packet = new DatagramPacket(buf, buf.length);

            this.socket.receive(packet);

            new Thread(new MessageParser(packet, peer)).start();

            String received = new String(

              packet.getData(), 0, packet.getLength());

            if ("end".equals(received)) {

                break;

            }

        }

        this.socket.leaveGroup(group);

        this.socket.close();

    }

            catch(IOException ex) {

                    System.out.println("Channel Exception:" + ex.toString());

                    ex.printStackTrace();

                    }

            }

        public void sendMessage(byte[] msg) throws UnknownHostException {

                DatagramPacket packet = new DatagramPacket(msg, msg.length, InetAddress.getByName(this.IP), this.Port);

                try {

                    this.socket.send(packet);

                } catch (IOException e) {

                        e.printStackTrace();

                }

        }

}