InetAddress ia = null;
int port = 0;
byte ttl = (byte) 1;
// read the address from the command line
try {
ia = InetAddress.getByName(args[0]);
port = Integer.parseInt(args[1]);
if (args.length > 2) ttl = (byte) Integer.parseInt(args[2]);
}
catch (Exception ex) {
System.err.println(ex);
System.err.println(
"Usage: java MulticastSender multicast_address port ttl");
System.exit(1);
}
byte[] data = "Here's some multicast data\r\n".getBytes();
DatagramPacket dp = new DatagramPacket(data, data.length, ia, port);
try {
MulticastSocket ms = new MulticastSocket();
ms.joinGroup(ia);
for (int i = 1; i < 10; i++) {
ms.send(dp, ttl);
}
ms.leaveGroup(ia);
ms.close();
}
catch (SocketException ex) {
System.err.println(ex);
}
catch (IOException ex) {
System.err.println(ex);
}
