public boolean send(String msg, String bindAddr, int bindPort) {
try {
MulticastSocket msock;
if ((bindAddr) != null && (0 < bindPort)) {
msock = new MulticastSocket(null);
msock.bind(new InetSocketAddress(bindAddr, bindPort));
} else msock = new MulticastSocket();
DatagramPacket dgmPacket = new DatagramPacket(msg.getBytes(), msg.length(), ssdpMultiGroup);
// Thnaks for Tho Beisch (11/09/04)
msock.setTimeToLive(4);
msock.send(dgmPacket);
msock.close();
} catch (Exception e) {
Debug.warning(e);
return false;
}
return true;
}
void closeMulticastSocket() {
if (mcast_sock != null) {
try {
if (mcast_addr != null) {
// by sending a dummy packet the thread will be awakened
sendDummyPacket(mcast_addr.getIpAddress(), mcast_addr.getPort());
Util.sleep(300);
mcast_sock.leaveGroup(mcast_addr.getIpAddress());
}
mcast_sock.close(); // this will cause the mcast receiver thread to break out of its loop
mcast_sock = null;
if (Trace.trace) {
Trace.info("UDP.closeMulticastSocket()", "multicast socket closed");
}
} catch (IOException ex) {
}
mcast_addr = null;
}
}
public static void main(String[] args) throws IOException {
MulticastSocket socket = new MulticastSocket(4446);
InetAddress address = InetAddress.getByName("230.0.0.1");
socket.joinGroup(address);
DatagramPacket packet;
// get a few quotes
for (int i = 0; i < 5; i++) {
byte[] buf = new byte[256];
packet = new DatagramPacket(buf, buf.length);
socket.receive(packet);
String received = new String(packet.getData(), 0, packet.getLength());
System.out.println("Quote of the Moment: " + received);
}
socket.leaveGroup(address);
socket.close();
}
