test/jdk/java/net/NetworkInterface/NetworkInterfaceRetrievalTests.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 8179559
 */

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;

public class NetworkInterfaceRetrievalTests {
    public static void main(String[] args) throws Exception {
        int checkFailureCount = 0;

        try {
            Enumeration<NetworkInterface> en = NetworkInterface
                    .getNetworkInterfaces();
            while (en.hasMoreElements()) {
                NetworkInterface ni = en.nextElement();
                Enumeration<InetAddress> addrs = ni.getInetAddresses();
                System.out.println("############ Checking network interface + "
                        + ni + " #############");
                while (addrs.hasMoreElements()) {
                    InetAddress addr = addrs.nextElement();
                    System.out.println("************ Checking address  + "
                            + addr + " *************");
                    NetworkInterface addrNetIf = NetworkInterface
                            .getByInetAddress(addr);
                    if (addrNetIf.equals(ni)) {
                        System.out.println("Retreived net if " + addrNetIf
                                + " equal to owning net if " + ni);
                    } else {
                        System.out.println("Retreived net if " + addrNetIf
                                + "NOT  equal to owning net if " + ni
                                + "***********");
                        checkFailureCount++;
                    }

                }
            }

        } catch (Exception ex) {

        }

        if (checkFailureCount > 0) {
            throw new RuntimeException(
                    "NetworkInterface lookup by address didn't match owner network interface");
        }
    }
}