1 /*

     2  * Copyright 2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /**

    25  * @test

    26  * @bug 6376404

    27  * @summary InetAddress needs a getLoopbackAddress

    28  */

    29 import java.net.*;

    30 

    31 public class GetLoopbackAddress

    32 {

    33     static InetAddress IPv4Loopback;

    34     static InetAddress IPv6Loopback;

    35 

    36     static {

    37         try {

    38             IPv4Loopback = InetAddress.getByAddress(

    39                 new byte[] {0x7F,0x00,0x00,0x01});

    40 

    41             IPv6Loopback = InetAddress.getByAddress(

    42                 new byte[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

    43                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01});

    44         } catch (UnknownHostException e) {

    45         }

    46     }

    47 

    48     public static void main(String[] args) {

    49         InetAddress addr = InetAddress.getLoopbackAddress();

    50 

    51         if (!(addr.equals(IPv4Loopback) || addr.equals(IPv6Loopback)))

    52             throw new RuntimeException("Failed: getLoopbackAddress" +

    53                  " not returning a valid loopback address");

    54 

    55         InetAddress addr2 = InetAddress.getLoopbackAddress();

    56 

    57         if (addr != addr2)

    58             throw new RuntimeException("Failed: getLoopbackAddress" +

    59                 " should return a reference to the same InetAddress loopback instance.");

    60     }

    61 }