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81 lines
3.0 KiB
81 lines
3.0 KiB
/*
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* Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of Oracle nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This source code is provided to illustrate the usage of a given feature
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* or technique and has been deliberately simplified. Additional steps
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* required for a production-quality application, such as security checks,
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* input validation and proper error handling, might not be present in
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* this sample code.
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*/
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import java.nio.channels.*;
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import java.nio.charset.Charset;
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import java.net.*;
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import java.io.IOException;
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import java.util.*;
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/**
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* Sample multicast sender to send a message in a multicast datagram
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* to a given group.
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*/
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public class Sender {
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private static void usage() {
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System.err.println("usage: java Sender group:port[@interface] message");
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System.exit(-1);
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}
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public static void main(String[] args) throws IOException {
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if (args.length < 2)
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usage();
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MulticastAddress target = MulticastAddress.parse(args[0]);
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// create socket
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ProtocolFamily family = StandardProtocolFamily.INET;
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if (target.group() instanceof Inet6Address)
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family = StandardProtocolFamily.INET6;
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DatagramChannel dc = DatagramChannel.open(family).bind(new InetSocketAddress(0));
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if (target.interf() != null) {
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dc.setOption(StandardSocketOptions.IP_MULTICAST_IF, target.interf());
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}
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// send multicast packet
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dc.send(Charset.defaultCharset().encode(args[1]),
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new InetSocketAddress(target.group(), target.port()));
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dc.close();
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}
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}
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