/*

 * Copyright (c) 2019, 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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 * questions.

 */

/* @test

 * @library /test/lib

 * @summary Test DatagramChannel local address after disconnect.

 * @requires (os.family != "mac")

 * @run testng/othervm AddressesAfterDisconnect

 * @run testng/othervm -Djava.net.preferIPv6Addresses=true AddressesAfterDisconnect

 * @run testng/othervm -Djava.net.preferIPv4Stack=true AddressesAfterDisconnect

 */

import jdk.test.lib.net.IPSupport;

import java.io.IOException;

import java.net.InetAddress;

import java.net.InetSocketAddress;

import java.net.SocketAddress;

import java.net.StandardProtocolFamily;

import java.nio.channels.DatagramChannel;

import org.testng.annotations.Test;

import static org.testng.Assert.assertEquals;

import static org.testng.Assert.assertTrue;

import static org.testng.Assert.assertFalse;

public class AddressesAfterDisconnect {

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

        new AddressesAfterDisconnect().execute();

    }

    @Test

    public void execute() throws IOException {

        IPSupport.throwSkippedExceptionIfNonOperational();

        boolean preferIPv6 = Boolean.getBoolean("java.net.preferIPv6Addresses");

        // test with default protocol family

        try (DatagramChannel dc = DatagramChannel.open()) {

            System.out.println("Test with default");

            dc.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));

            test(dc);

            test(dc);

        }

        if (IPSupport.hasIPv6()) {

            // test with IPv6 only

            System.out.println("Test with IPv6 only");

            try (DatagramChannel dc = DatagramChannel.open(StandardProtocolFamily.INET6)) {

                dc.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));

                test(dc);

                test(dc);

            }

        }

        if (IPSupport.hasIPv4() && !preferIPv6) {

            // test with IPv4 only

            System.out.println("Test with IPv4 only");

            try (DatagramChannel dc = DatagramChannel.open(StandardProtocolFamily.INET)) {

                dc.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));

                test(dc);

                test(dc);

            }

        }

    }

    /**

     * Connect DatagramChannel to a server, write a datagram and disconnect. Invoke

     * a second or subsequent time with the same DatagramChannel instance to check

     * that disconnect works as expected.

     */

    static void test(DatagramChannel dc) throws IOException {

        SocketAddress local = dc.getLocalAddress();

        try (DatagramChannel server = DatagramChannel.open()) {

            server.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));

            SocketAddress remote = server.getLocalAddress();

            dc.connect(remote);

            assertTrue(dc.isConnected());

            // comment the following two lines on OS X to see JDK-8231259

            assertEquals(dc.getLocalAddress(), local, "local address after connect");

            assertEquals(dc.getRemoteAddress(), remote, "remote address after connect");

            dc.disconnect();

            assertFalse(dc.isConnected());

            assertEquals(dc.getLocalAddress(), local, "local address after disconnect");

            assertEquals(dc.getRemoteAddress(), null, "remote address after disconnect");

        }

    }

}