1 /*
2  * Copyright (c) 2012, 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  * Portions Copyright (c) 2012 IBM Corporation
26  */
27 
28 /* @test
29  * @bug 7163874 8133015
30  * @summary InetAddress.isReachable is returning false
31  *          for InetAdress 0.0.0.0 and ::0
32  * @run main PingThis
33  * @run main/othervm -Djava.net.preferIPv4Stack=true PingThis
34  */
35 
36 import java.net.Inet6Address;
37 import java.net.InetAddress;
38 import java.net.NetworkInterface;
39 import java.util.ArrayList;
40 import java.util.Collections;
41 import java.util.Iterator;
42 import java.util.List;
43 
44 public class PingThis {
hasIPv6()45     private static boolean hasIPv6() throws Exception {
46         List<NetworkInterface> nics = Collections.list(NetworkInterface
47                 .getNetworkInterfaces());
48         for (NetworkInterface nic : nics) {
49             List<InetAddress> addrs = Collections.list(nic.getInetAddresses());
50             for (InetAddress addr : addrs) {
51                 if (addr instanceof Inet6Address)
52                     return true;
53             }
54         }
55 
56         return false;
57     }
58 
main(String args[])59     public static void main(String args[]) throws Exception {
60         if (System.getProperty("os.name").startsWith("Windows")) {
61             return;
62         }
63 
64         boolean preferIPv4Stack = "true".equals(System
65                 .getProperty("java.net.preferIPv4Stack"));
66         List<String> addrs = new ArrayList<String>();
67         InetAddress inetAddress = null;
68 
69         addrs.add("0.0.0.0");
70         if (!preferIPv4Stack) {
71             if (hasIPv6()) {
72                 addrs.add("::0");
73             }
74         }
75 
76         for (String addr : addrs) {
77             inetAddress = InetAddress.getByName(addr);
78             System.out.println("The target ip is "
79                     + inetAddress.getHostAddress());
80             boolean isReachable = inetAddress.isReachable(3000);
81             System.out.println("the target is reachable: " + isReachable);
82             if (isReachable) {
83                 System.out.println("Test passed ");
84             } else {
85                 System.out.println("Test failed ");
86                 throw new Exception("address " + inetAddress.getHostAddress()
87                         + " can not be reachable!");
88             }
89         }
90     }
91 }
92