1 /*
   2  * Copyright (c) 2015, 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 /*
  25  * @test
  26  * @bug 8133196
  27  * @summary test functionality of getOriginalHostName(InetAddress)
  28  * @modules java.base/jdk.internal.misc
  29  */
  30 
  31 import java.io.*;
  32 import java.net.InetAddress;
  33 
  34 import jdk.internal.misc.JavaNetInetAddressAccess;
  35 import jdk.internal.misc.SharedSecrets;
  36 
  37 public class getOriginalHostName {
  38 
  39     private static final JavaNetInetAddressAccess jna =
  40         SharedSecrets.getJavaNetInetAddressAccess();
  41 
  42     public static void main(String[] args) throws Exception {
  43         final String HOST = "dummyserver.java.net";
  44         InetAddress ia = null;
  45         ia = InetAddress.getByName(HOST);
  46         testInetAddress(ia, HOST);
  47         ia = InetAddress.getByName("255.255.255.0");
  48         testInetAddress(ia, null);
  49         ia = InetAddress.getByAddress(new byte[]{1,1,1,1});
  50         testInetAddress(ia, null);
  51         ia = InetAddress.getLocalHost();
  52         testInetAddress(ia, ia.getHostName());
  53         ia = InetAddress.getLoopbackAddress();
  54         testInetAddress(ia, ia.getHostName());
  55     }
  56 
  57 
  58     private static void testInetAddress(InetAddress ia, String expected)
  59         throws Exception {
  60 
  61         System.out.println("Testing InetAddress: " + ia);
  62         System.out.println("Expecting original hostname of : " + expected);
  63         String origHostName = jna.getOriginalHostName(ia);
  64         System.out.println("via JavaNetAccess: " + origHostName);
  65         if (origHostName == null && expected != null) {
  66             throw new RuntimeException("Unexpected null. Testing:" + expected);
  67         } else if (expected != null && !origHostName.equals(expected)) {
  68             throw new RuntimeException("Unexpected hostname :" + origHostName);
  69         } else if (expected == null && origHostName != null) {
  70             throw new RuntimeException("Unexpected origHostName: " + origHostName);
  71         }
  72     }
  73 }