test/jdk/java/net/NetworkInterface/SubNetworkInterfaceTest.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 8168840
 * @summary InetAddress.getByName() throws java.net.UnknownHostException no such
 * interface when used with virtual interfaces on Solaris
 */
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Collections;
import java.util.Enumeration;

public class SubNetworkInterfaceTest {

    public static void main(String args[]) throws SocketException, UnknownHostException {
        Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();
        for (NetworkInterface netIf : Collections.list(nets)) {
            doReverseLookup(netIf);
        }
    }

    static void doReverseLookup(NetworkInterface netIf) throws SocketException, UnknownHostException {
        for (NetworkInterface subIf : Collections.list(netIf.getSubInterfaces())) {
            Enumeration<InetAddress> subInetAddresses = subIf.getInetAddresses();
            while (subInetAddresses != null && subInetAddresses.hasMoreElements()) {
                InetAddress inetAddress = subInetAddresses.nextElement();
                String reversalString = inetAddress.getHostAddress();
                //should not throw UHE in case of virtual sub interface
                InetAddress.getByName(reversalString);
            }
        }
    }
}