1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /* @test

    25  * @library /test/lib

    26  * @summary Test DatagramChannel local address after disconnect.

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

    28  * @run testng/othervm AddressesAfterDisconnect

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

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

    31  */

    32 

    33 import jdk.test.lib.net.IPSupport;

    34 

    35 import java.io.IOException;

    36 import java.net.InetAddress;

    37 import java.net.InetSocketAddress;

    38 import java.net.SocketAddress;

    39 import java.net.StandardProtocolFamily;

    40 import java.nio.channels.DatagramChannel;

    41 

    42 import org.testng.annotations.Test;

    43 import static org.testng.Assert.assertEquals;

    44 import static org.testng.Assert.assertTrue;

    45 import static org.testng.Assert.assertFalse;

    46 

    47 public class AddressesAfterDisconnect {

    48 

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

    50         new AddressesAfterDisconnect().execute();

    51     }

    52 

    53     @Test

    54     public void execute() throws IOException {

    55         IPSupport.throwSkippedExceptionIfNonOperational();

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

    57 

    58         // test with default protocol family

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

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

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

    62             test(dc);

    63             test(dc);

    64         }

    65 

    66         if (IPSupport.hasIPv6()) {

    67             // test with IPv6 only

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

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

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

    71                 test(dc);

    72                 test(dc);

    73             }

    74         }

    75 

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

    77             // test with IPv4 only

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

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

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

    81                 test(dc);

    82                 test(dc);

    83             }

    84         }

    85     }

    86 

    87     /**

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

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

    90      * that disconnect works as expected.

    91      */

    92     static void test(DatagramChannel dc) throws IOException {

    93         SocketAddress local = dc.getLocalAddress();

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

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

    96             SocketAddress remote = server.getLocalAddress();

    97             dc.connect(remote);

    98             assertTrue(dc.isConnected());

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

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

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

   102             dc.disconnect();

   103             assertFalse(dc.isConnected());

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

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

   106         }

   107     }

   108 

   109 }