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/*
* Copyright (c) 2015, 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.
*/
import java.lang.reflect.Field;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.spi.NamingManager;
import com.sun.jndi.dns.DnsContext;
/**
* @bug 6991580
* @summary IPv6 Nameservers in resolv.conf throws NumberFormatException
*
* @author Severin Gehwolf
*/
public class IPv6NameserverPlatformParsingTest {
private static boolean foundIPv6 = false;
public static void main(String[] args) {
Hashtable<String, String> env = new Hashtable<>();
env.put(Context.INITIAL_CONTEXT_FACTORY, com.sun.jndi.dns.DnsContextFactory.class.getName());
String[] servers;
try {
Context ctx = NamingManager.getInitialContext(env);
if (!com.sun.jndi.dns.DnsContextFactory.platformServersAvailable()) {
throw new RuntimeException("FAIL: no platform servers available, test does not make sense");
}
DnsContext context = (DnsContext)ctx;
servers = getServersFromContext(context);
} catch (NamingException e) {
throw new RuntimeException(e);
}
for (String server: servers) {
System.out.println("DEBUG: 'nameserver = " + server + "'");
if (server.indexOf(':') >= 0 && server.indexOf('.') < 0) {
System.out.println("DEBUG: ==> Found IPv6 address in servers list: " + server);
foundIPv6 = true;
}
}
try {
new com.sun.jndi.dns.DnsClient(servers, 100, 1);
} catch (NumberFormatException e) {
throw new RuntimeException("FAIL: Tried to parse non-[]-encapsulated IPv6 address.", e);
} catch (Exception e) {
throw new RuntimeException("ERROR: Something unexpected happened.");
}
if (!foundIPv6) {
// This is a manual test, since it requires changing /etc/resolv.conf on Linux/Unix
// platforms. See comment as to how to run this test.
throw new RuntimeException("ERROR: No IPv6 address returned from platform.");
}
System.out.println("PASS: Found IPv6 address and DnsClient parsed it correctly.");
}
private static String[] getServersFromContext(DnsContext context) {
try {
Field serversField = DnsContext.class.getDeclaredField("servers");
serversField.setAccessible(true);
return (String[])serversField.get(context);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
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