import java.net.*;
import java.util.*;
import java.io.IOException;

//package test;

class Main {

//      static String hostname = new String("bigoli.salatschuessel.net");
        static String hostname = new String("10.0.0.23");
        private final static String IPV4_UPNP_HOST = "239.255.255.250";


        private static InetAddress getUPNPAddress() throws IOException {
                return InetAddress.getByAddress(IPV4_UPNP_HOST, new byte[]{(byte) 239, (byte) 255, (byte) 255, (byte) 250});
        }

        public static void main(String args[]) throws SocketException, UnknownHostException, IOException{
                NetworkInterface ni = NetworkInterface.getByInetAddress(InetAddress.getByName(hostname));
System.out.println(ni);
                MulticastSocket ssdpSocket = new MulticastSocket();
                if (ni != null) {
                        ssdpSocket.setNetworkInterface(ni);

                        // force IPv4 address
                        Enumeration<InetAddress> enm = ni.getInetAddresses();
                        while (enm.hasMoreElements()) {
                                InetAddress ia = enm.nextElement();
                                if (!(ia instanceof Inet6Address)) {
                                        ssdpSocket.setInterface(ia);
                                        break;
                                }
                        }
                }
System.out.println("Sending message from multicast socket on network interface: " + ssdpSocket.getNetworkInterface());
System.out.println("Multicast socket is on interface: " + ssdpSocket.getInterface());
                ssdpSocket.setTimeToLive(32);
                ssdpSocket.joinGroup(getUPNPAddress());
                System.out.println("Socket Timeout: " + ssdpSocket.getSoTimeout());
                System.out.println("Socket TTL: " + ssdpSocket.getTimeToLive());
        }
}