IPv4Only.java

/*
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 * 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.
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/* @test
 * @bug 6964714 8226928
 * @run main/othervm -Djava.net.preferIPv4Stack=true IPv4Only
 * @summary Test the networkinterface listing with java.net.preferIPv4Stack=true.
 */


import java.net.*;
import java.util.*;


public class IPv4Only {
    public static void main(String[] args) throws Exception {
        Enumeration<NetworkInterface> nifs = NetworkInterface.getNetworkInterfaces();
        while (nifs.hasMoreElements()) {
            NetworkInterface nif = nifs.nextElement();
            Enumeration<InetAddress> addrs = nif.getInetAddresses();
            while (addrs.hasMoreElements()) {
               InetAddress hostAddr = addrs.nextElement();
               if ( hostAddr instanceof Inet6Address ){
                    throw new RuntimeException( "NetworkInterfaceV6List failed - found v6 address " + hostAddr.getHostAddress() );
               }
            }
        }
    }
}