1 /*
2  * Copyright (c) 2006, 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 package test.java.net.InetAddress;
24 
25 /**
26  * @test
27  * @bug 6376404 8201545
28  * @summary InetAddress needs a getLoopbackAddress
29  */
30 import java.net.*;
31 import org.testng.annotations.Test;
32 import org.testng.Assert;
33 
34 public class GetLoopbackAddress
35 {
36     static InetAddress IPv4Loopback;
37     static InetAddress IPv6Loopback;
38 
39     static {
40         try {
41             IPv4Loopback = InetAddress.getByAddress(
42                     new byte[] {0x7F,0x00,0x00,0x01});
43 
44             IPv6Loopback = InetAddress.getByAddress(
45                     new byte[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
46                             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01});
47         } catch (UnknownHostException e) {
48         }
49     }
50 
51     @Test
testLoopbackAddresses()52     public void testLoopbackAddresses() throws Exception {
53         InetAddress addr = InetAddress.getLoopbackAddress();
54 
55         if (!(addr.equals(IPv4Loopback) || addr.equals(IPv6Loopback))) {
56             Assert.fail("Failed: getLoopbackAddress" +
57                     " not returning a valid loopback address");
58         }
59 
60         InetAddress addr2 = InetAddress.getLoopbackAddress();
61 
62         Assert.assertEquals(addr, addr2);
63 
64         InetAddress addrFromNullHost = InetAddress.getByName(null);
65         Assert.assertTrue(addrFromNullHost.isLoopbackAddress());
66 
67         InetAddress addrFromEmptyHost = InetAddress.getByName("");
68         Assert.assertTrue(addrFromEmptyHost.isLoopbackAddress());
69 
70         InetAddress[] addrsByNull = InetAddress.getAllByName(null);
71         Assert.assertTrue(addrsByNull[0].isLoopbackAddress());
72         InetAddress[] addrsByEmpty = InetAddress.getAllByName("");
73         Assert.assertTrue(addrsByEmpty[0].isLoopbackAddress());
74     }
75 }