1/*
2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 *   - Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 *
11 *   - Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 *
15 *   - Neither the name of Oracle nor the names of its
16 *     contributors may be used to endorse or promote products derived
17 *     from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * This source code is provided to illustrate the usage of a given feature
34 * or technique and has been deliberately simplified. Additional steps
35 * required for a production-quality application, such as security checks,
36 * input validation and proper error handling, might not be present in
37 * this sample code.
38 */
39
40
41import java.nio.channels.*;
42import java.nio.charset.Charset;
43import java.net.*;
44import java.io.IOException;
45import java.util.*;
46
47/**
48 * Sample multicast sender to send a message in a multicast datagram
49 * to a given group.
50 */
51
52public class Sender {
53
54    private static void usage() {
55        System.err.println("usage: java Sender group:port[@interface] message");
56        System.exit(-1);
57    }
58
59    public static void main(String[] args) throws IOException {
60        if (args.length < 2)
61            usage();
62
63        MulticastAddress target = MulticastAddress.parse(args[0]);
64
65        // create socket
66        ProtocolFamily family = StandardProtocolFamily.INET;
67        if (target.group() instanceof Inet6Address)
68            family = StandardProtocolFamily.INET6;
69        DatagramChannel dc = DatagramChannel.open(family).bind(new InetSocketAddress(0));
70        if (target.interf() != null) {
71            dc.setOption(StandardSocketOptions.IP_MULTICAST_IF, target.interf());
72        }
73
74        // send multicast packet
75        dc.send(Charset.defaultCharset().encode(args[1]),
76                new InetSocketAddress(target.group(), target.port()));
77        dc.close();
78    }
79
80}
81