/*

 * Copyright (c) 2008, 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

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 */

/* @test

 * @bug 6717876

 * @summary Make java.net.NetworkInterface.getIndex() public

 */

import java.net.*;

import java.util.Arrays;

import java.util.Collections;

import java.util.Enumeration;

import static java.lang.System.out;

public class IndexTest {

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

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

        Enumeration<NetworkInterface> netifs = NetworkInterface.getNetworkInterfaces();

        NetworkInterface nif;

        while (netifs.hasMoreElements()) {

            nif = netifs.nextElement();

            // JDK-8022212, Skip (Windows) Teredo Tunneling Pseudo-Interface

            String dName = nif.getDisplayName();

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

                continue;

            int index = nif.getIndex();

            if (index >= 0) {

                NetworkInterface nif2 = NetworkInterface.getByIndex(index);

                if (! nif.equals(nif2)) {

                    out.printf("%nExpected interfaces to be the same, but got:%n");

                    displayInterfaceInformation(nif);

                    displayInterfaceInformation(nif2);

                    throw new RuntimeException("both interfaces should be equal");

                }

            }

        }

        try {

            nif = NetworkInterface.getByIndex(-1);

            out.printf("%ngetByIndex(-1) should have thrown, but instead returned:%n");

            displayInterfaceInformation(nif);

            throw new RuntimeException("Should have thrown IllegalArgumentException");

        } catch (IllegalArgumentException e) {

            // OK

        }

        // In all likelyhood, this interface should not exist.

        nif = NetworkInterface.getByIndex(Integer.MAX_VALUE - 1);

        if (nif != null) {

            out.printf("%ngetByIndex(MAX_VALUE - 1), expected null, got:%n");

            displayInterfaceInformation(nif);

            throw new RuntimeException("getByIndex() should have returned null");

        }

    }

    static void displayInterfaceInformation(NetworkInterface netint) throws SocketException {

        out.printf("Display name: %s%n", netint.getDisplayName());

        out.printf("Name: %s%n", netint.getName());

        Enumeration<InetAddress> inetAddresses = netint.getInetAddresses();

        for (InetAddress inetAddress : Collections.list(inetAddresses))

            out.printf("InetAddress: %s%n", inetAddress);

        out.printf("Up? %s%n", netint.isUp());

        out.printf("Loopback? %s%n", netint.isLoopback());

        out.printf("PointToPoint? %s%n", netint.isPointToPoint());

        out.printf("Supports multicast? %s%n", netint.supportsMulticast());

        out.printf("Virtual? %s%n", netint.isVirtual());

        out.printf("Hardware address: %s%n",

                    Arrays.toString(netint.getHardwareAddress()));

        out.printf("MTU: %s%n", netint.getMTU());

        out.printf("Index: %s%n", netint.getIndex());

        out.printf("%n");

     }

}