/*

 * Copyright (c) 2001, 2013, 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 4405354 6594296 8058216

 * @run main Test

 * @run main/othervm -Djava.net.preferIPv4Stack=true Test

 * @summary Basic tests for NetworkInterface

 */

import java.net.NetworkInterface;

import java.net.InetAddress;

import java.util.Enumeration;

public class Test {

    static final boolean isWindows = System.getProperty("os.name").startsWith("Windows");

    public static void main(String args[]) throws Exception {

        Enumeration nifs = NetworkInterface.getNetworkInterfaces();

        while (nifs.hasMoreElements()) {

            NetworkInterface ni = (NetworkInterface)nifs.nextElement();

            //JDK-8038276: Should not test on Windows with Teredo Tunneling Pseudo-Interface

            String dName = ni.getDisplayName();

            if (isWindows && dName != null && dName.contains("Teredo"))

                continue;

            String name = ni.getName();

            System.out.println("\n" + name);

            /*

             * Enumeration the IP addresses on this interface

             */

            Enumeration addrs = ni.getInetAddresses();

            while (addrs.hasMoreElements()) {

                InetAddress addr = (InetAddress)addrs.nextElement();

                System.out.println(addr);

                if (NetworkInterface.getByInetAddress(addr) == null) {

                    throw new Exception("getByInetAddress returned null");

                }

            }

            System.out.println("getInetAddresses() test passed.");

            /*

             * Check equals and hashCode contract

             */

            NetworkInterface ni2 = NetworkInterface.getByName(name);

            if (!ni2.equals(ni)) {

                throw new Exception("getByName returned: " + ni2);

            }

            if (!ni.equals(ni2)) {

                throw new Exception("equals specification broken");

            }

            System.out.println("equals() tests passed.");

            if (ni2.hashCode() != ni.hashCode()) {

                throw new Exception("hashCode contract broken");

            }

            System.out.println("hashCode() test passed.");

            byte[] ba = ni.getHardwareAddress();

            if (ba != null && ba.length == 0) {

                throw new Exception("getHardwareAddress returned 0 length byte array");

            }

            System.out.println("getHardwareAddress() test passed.");

        }

        // misc tests :-

        //      getByXXX(null) should throw NPE

        //      getByXXX("garbage") should return null

        System.out.println("\nMiscellenous tests: ");

        try {

            NetworkInterface.getByName(null);

        } catch (NullPointerException npe) {

        }

        System.out.println("getByName(null) test passed.");

        try {

            NetworkInterface.getByInetAddress(null);

        } catch (NullPointerException npe) {

        }

        System.out.println("getByInetAddress(null) test passed.");

        if (NetworkInterface.getByName("not-a-valid-name") != null) {

            throw new Exception

                ("getByName returned unexpected interface: null expected");

        }

        System.out.println("getByName(<unknown>) test passed.");

        InetAddress ia = InetAddress.getByName("255.255.255.255");

        if (NetworkInterface.getByInetAddress(ia) != null) {

            throw new Exception

                ("getByInetAddress returned unexpected interface: null expected");

        }

        System.out.println("getByName(getByInetAddress(<unknown>) test passed.");

    }

}