IPv6NameserverPlatformParsingTest.java revision 11798:8000249dcb2a 
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
24import java.lang.reflect.Field;
25import java.util.Hashtable;
26
27import javax.naming.Context;
28import javax.naming.NamingException;
29import javax.naming.spi.NamingManager;
30
31import com.sun.jndi.dns.DnsContext;
32
33/**
34 * @test
35 * @bug 6991580
36 * @summary IPv6 Nameservers in resolv.conf throws NumberFormatException
37 * @run main/manual IPv6NameserverPlatformParsingTest
38 *
39 * In order to run this test be sure to place, for example, the following
40 * snippet into your platform's {@code /etc/resolv.conf}:
41 * <pre>
42 * nameserver 127.0.0.1
43 * nameserver 2001:4860:4860::8888
44 * nameserver [::1]:5353
45 * nameserver 127.0.0.1:5353
46 * </pre>
47 *
48 * Then, run this test as manual jtreg test.
49 *
50 * @author Severin Gehwolf
51 *
52 */
53public class IPv6NameserverPlatformParsingTest {
54
55    private static boolean foundIPv6 = false;
56
57    public static void main(String[] args) {
58        Hashtable<String, String> env = new Hashtable<>();
59        env.put(Context.INITIAL_CONTEXT_FACTORY, com.sun.jndi.dns.DnsContextFactory.class.getName());
60
61        String[] servers;
62        try {
63            Context ctx = NamingManager.getInitialContext(env);
64            if (!com.sun.jndi.dns.DnsContextFactory.platformServersAvailable()) {
65                throw new RuntimeException("FAIL: no platform servers available, test does not make sense");
66            }
67            DnsContext context = (DnsContext)ctx;
68            servers = getServersFromContext(context);
69        } catch (NamingException e) {
70            throw new RuntimeException(e);
71        }
72        for (String server: servers) {
73            System.out.println("DEBUG: 'nameserver = " + server + "'");
74            if (server.indexOf(':') >= 0 && server.indexOf('.') < 0) {
75                System.out.println("DEBUG: ==> Found IPv6 address in servers list: " + server);
76                foundIPv6 = true;
77            }
78        }
79        try {
80            new com.sun.jndi.dns.DnsClient(servers, 100, 1);
81        } catch (NumberFormatException e) {
82            throw new RuntimeException("FAIL: Tried to parse non-[]-encapsulated IPv6 address.", e);
83        } catch (Exception e) {
84            throw new RuntimeException("ERROR: Something unexpected happened.");
85        }
86        if (!foundIPv6) {
87            // This is a manual test, since it requires changing /etc/resolv.conf on Linux/Unix
88            // platforms. See comment as to how to run this test.
89            throw new RuntimeException("ERROR: No IPv6 address returned from platform.");
90        }
91        System.out.println("PASS: Found IPv6 address and DnsClient parsed it correctly.");
92    }
93
94    private static String[] getServersFromContext(DnsContext context) {
95        try {
96            Field serversField = DnsContext.class.getDeclaredField("servers");
97            serversField.setAccessible(true);
98            return (String[])serversField.get(context);
99        } catch (Exception e) {
100            throw new RuntimeException(e);
101        }
102    }
103
104}
105