/*
* Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.
*
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* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
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*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
import java.nio.channels.*;
import java.nio.charset.Charset;
import java.net.*;
import java.io.IOException;
import java.util.*;
/**
* Sample multicast sender to send a message in a multicast datagram
* to a given group.
*/
public class Sender {
private static void usage() {
System.err.println("usage: java Sender group:port[@interface] message");
System.exit(-1);
}
public static void main(String[] args) throws IOException {
if (args.length < 2)
usage();
MulticastAddress target = MulticastAddress.parse(args[0]);
// create socket
ProtocolFamily family = StandardProtocolFamily.INET;
if (target.group() instanceof Inet6Address)
family = StandardProtocolFamily.INET6;
DatagramChannel dc = DatagramChannel.open(family).bind(new InetSocketAddress(0));
if (target.interf() != null) {
dc.setOption(StandardSocketOptions.IP_MULTICAST_IF, target.interf());
}
// send multicast packet
dc.send(Charset.defaultCharset().encode(args[1]),
new InetSocketAddress(target.group(), target.port()));
dc.close();
}
}