test/jdk/java/net/MulticastSocket/TestDefaults.java

/*
 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 4488458
 * @summary Test that MutlicastSocket.getInterface, getTimeToLive, and
 *          getLoopbackMode work as expected on Linux 2.2 kernel
 *          if IPv6 is enabled.
 */
import java.net.*;

public class TestDefaults {

    public static void main(String args[]) throws Exception {
        MulticastSocket mc = new MulticastSocket();

        int ttl = mc.getTimeToLive();
        InetAddress ia = mc.getInterface();
        boolean mode = mc.getLoopbackMode();

        System.out.println("Default multicast settings:");
        System.out.println("      ttl: " + ttl);
        System.out.println("interface: " + ia);
        System.out.println(" loopback: " + mode);

        if (ttl != 1) {
            throw new Exception("Default ttl != 1  -- test failed!!!");
        }

    }
}