/* * Created on Jun 11, 2009 * Created by Paul Gardner * * Copyright 2009 Vuze, Inc. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License only. * * This program 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 for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. */ package com.aelitis.azureus.core.util; import java.net.Inet6Address; import java.net.InetAddress; import java.net.UnknownHostException; import java.util.List; import org.gudy.azureus2.core3.util.Debug; public class DNSUtils { private static DNSUtilsIntf impl; static{ String cla = System.getProperty( "az.factory.dnsutils.impl", "com.aelitis.azureus.core.util.dns.DNSUtilsImpl" ); try{ impl = (DNSUtilsIntf)Class.forName( cla ).newInstance(); }catch( Throwable e ){ Debug.out( "Failed to instantiate impl: " + cla, e ); } } public static DNSUtilsIntf getSingleton() { return( impl ); } public interface DNSUtilsIntf { public DNSDirContext getInitialDirContext() throws Exception; public DNSDirContext getDirContextForServer( String dns_server_ip ) throws Exception; public Inet6Address getIPV6ByName( String host ) throws UnknownHostException; public List<InetAddress> getAllByName( String host ) throws UnknownHostException; public List<InetAddress> getAllByName( DNSUtils.DNSDirContext context, String host ) throws UnknownHostException; public List<String> getTXTRecords( String query ); public String getTXTRecord( String query ) throws UnknownHostException; } public interface DNSDirContext { public String getString(); } }