InetAddress group = null;
int port = 0;
// read the address from the command line
try {
group = InetAddress.getByName(args[0]);
port = Integer.parseInt(args[1]);
} // end try
catch (Exception ex) {
// ArrayIndexOutOfBoundsException, NumberFormatException,
// or UnknownHostException
System.err.println(
"Usage: java MulticastSniffer multicast_address port");
System.exit(1);
}
MulticastSocket ms = null;
try {
ms = new MulticastSocket(port);
ms.joinGroup(group);
byte[] buffer = new byte[8192];
while (true) {
DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
ms.receive(dp);
String s = new String(dp.getData());
System.out.println(s);
}
}
catch (IOException ex) {
System.err.println(ex);
}
finally {
if (ms != null) {
try {
ms.leaveGroup(group);
ms.close();
}
catch (IOException ex) {}
}
}
