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 }