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/*
* Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8133196
* @summary test functionality of getOriginalHostName(InetAddress)
* @modules java.base/jdk.internal.access
*/
import java.net.InetAddress;
import jdk.internal.access.JavaNetInetAddressAccess;
import jdk.internal.access.SharedSecrets;
public class getOriginalHostName {
private static final JavaNetInetAddressAccess jna =
SharedSecrets.getJavaNetInetAddressAccess();
public static void main(String[] args) throws Exception {
final String HOST = "localhost";
InetAddress ia = null;
ia = getInetAddress(HOST);
if (ia != null) testInetAddress(ia, HOST);
ia = InetAddress.getByAddress(HOST, new byte[] { 1, 2, 3, 4});
testInetAddress(ia, HOST);
ia = InetAddress.getByName("255.255.255.0");
testInetAddress(ia, null);
ia = InetAddress.getByAddress(new byte[]{1,1,1,1});
testInetAddress(ia, null);
ia = InetAddress.getLocalHost();
testInetAddress(ia, ia.getHostName());
ia = InetAddress.getLoopbackAddress();
testInetAddress(ia, ia.getHostName());
}
private static InetAddress getInetAddress(String host) {
try {
return InetAddress.getByName(host);
} catch (java.net.UnknownHostException uhe) {
System.out.println("Skipping " + host + " due to " + uhe);
return null;
}
}
private static void testInetAddress(InetAddress ia, String expected)
throws Exception {
System.out.println("Testing InetAddress: " + ia);
System.out.println("Expecting original hostname of : " + expected);
String origHostName = jna.getOriginalHostName(ia);
System.out.println("via JavaNetAccess: " + origHostName);
if (origHostName == null && expected != null) {
throw new RuntimeException("Unexpected null. Testing:" + expected);
} else if (expected != null && !origHostName.equals(expected)) {
throw new RuntimeException("Unexpected hostname :" + origHostName);
} else if (expected == null && origHostName != null) {
throw new RuntimeException("Unexpected origHostName: " + origHostName);
}
}
}
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