jdk/test/java/net/MulticastSocket/JoinLeave.java

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/*
 * @test
 * @bug 4091811 4148753 4102731
 * @summary Test java.net.MulticastSocket joinGroup and leaveGroup
 * @library /lib/testlibrary
 * @build jdk.testlibrary.NetworkConfiguration
 * @run main JoinLeave
 */

import java.io.IOException;
import java.io.UncheckedIOException;
import java.net.InetAddress;
import java.net.MulticastSocket;
import java.net.NetworkInterface;
import jdk.testlibrary.NetworkConfiguration;

public class JoinLeave {

    public static void main(String args[]) throws IOException  {
        InetAddress ip4Group = InetAddress.getByName("224.80.80.80");
        InetAddress ip6Group = InetAddress.getByName("ff02::a");

        NetworkConfiguration nc = NetworkConfiguration.probe();
        nc.ip4MulticastInterfaces().forEach(nic -> joinLeave(ip4Group, nic));
        nc.ip6MulticastInterfaces().forEach(nic -> joinLeave(ip6Group, nic));
    }

    static void joinLeave(InetAddress group, NetworkInterface nif)
    {
        System.out.println("Joining:" + group + " on " + nif);
        try (MulticastSocket soc = new MulticastSocket()) {
            soc.setNetworkInterface(nif);
            soc.joinGroup(group);
            soc.leaveGroup(group);
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }
}