1 /*

     2  * Copyright (c) 2012, 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  * @bug 7132924

    26  * @summary Test DatagramChannel.disconnect when DatagramChannel is connected to an IPv4 socket

    27  * @run main Disconnect

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

    29  */

    30 

    31 import java.net.*;

    32 import java.nio.*;

    33 import java.nio.channels.*;

    34 import java.io.IOException;

    35 

    36 public class Disconnect {

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

    38         // test with default protocol family

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

    40             test(dc);

    41             test(dc);

    42         }

    43 

    44         // test with IPv4 only

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

    46             test(dc);

    47             test(dc);

    48         }

    49     }

    50 

    51     /**

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

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

    54      * that disconnect works as expected.

    55      */

    56     static void test(DatagramChannel dc) throws IOException {

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

    58             server.bind(new InetSocketAddress(0));

    59 

    60             InetAddress lh = InetAddress.getLocalHost();

    61             dc.connect(new InetSocketAddress(lh, server.socket().getLocalPort()));

    62 

    63             dc.write(ByteBuffer.wrap("hello".getBytes()));

    64 

    65             ByteBuffer bb = ByteBuffer.allocate(100);

    66             server.receive(bb);

    67 

    68             dc.disconnect();

    69 

    70             try {

    71                 dc.write(ByteBuffer.wrap("another message".getBytes()));

    72                 throw new RuntimeException("write should fail, not connected");

    73             } catch (NotYetConnectedException expected) {

    74             }

    75         }

    76     }

    77 }