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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * 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.

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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);

        }

    }

}