/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.directory.server.dns;
import java.io.IOException;
import org.apache.directory.server.dns.protocol.DnsProtocolHandler;
import org.apache.directory.server.dns.store.RecordStore;
import org.apache.directory.server.dns.store.jndi.JndiRecordStoreImpl;
import org.apache.directory.server.protocol.shared.DirectoryBackedService;
import org.apache.directory.server.protocol.shared.transport.TcpTransport;
import org.apache.directory.server.protocol.shared.transport.Transport;
import org.apache.directory.server.protocol.shared.transport.UdpTransport;
import org.apache.mina.core.service.IoAcceptor;
import org.apache.mina.transport.socket.DatagramAcceptor;
import org.apache.mina.transport.socket.DatagramSessionConfig;
import org.apache.mina.transport.socket.nio.NioSocketAcceptor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Contains the configuration parameters for the DNS protocol provider.
*
* @org.apache.xbean.XBean
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev: 900029 $, $Date: 2010-01-16 22:57:56 +0100 (Sam, 16 jan 2010) $
*/
public class DnsServer extends DirectoryBackedService
{
private static final long serialVersionUID = 6943138644427163149L;
/** logger for this class */
private static final Logger LOG = LoggerFactory.getLogger( DnsServer.class.getName() );
/** The default IP port. */
private static final int DEFAULT_IP_PORT = 53;
/** The default service pid. */
private static final String SERVICE_PID_DEFAULT = "org.apache.directory.server.dns";
/** The default service name. */
private static final String SERVICE_NAME_DEFAULT = "ApacheDS DNS Service";
/**
* Creates a new instance of DnsConfiguration.
*/
public DnsServer()
{
super.setServiceId( SERVICE_PID_DEFAULT );
super.setServiceName( SERVICE_NAME_DEFAULT );
}
/**
* @throws IOException if we cannot bind to the specified ports
*/
public void start() throws IOException
{
RecordStore store = new JndiRecordStoreImpl( getSearchBaseDn(), getSearchBaseDn(), getDirectoryService() );
if ( ( transports == null ) || ( transports.size() == 0 ) )
{
// Default to UDP with port 53
// We have to create a DatagramAcceptor
UdpTransport transport = new UdpTransport( DEFAULT_IP_PORT );
setTransports( transport );
DatagramAcceptor acceptor = (DatagramAcceptor)transport.getAcceptor();
// Set the handler
acceptor.setHandler( new DnsProtocolHandler( this, store ) );
// Allow the port to be reused even if the socket is in TIME_WAIT state
((DatagramSessionConfig)acceptor.getSessionConfig()).setReuseAddress( true );
// Start the listener
acceptor.bind();
}
else
{
for ( Transport transport:transports )
{
// Get the acceptor
IoAcceptor acceptor = transport.getAcceptor();
// Set the handler
acceptor.setHandler( new DnsProtocolHandler( this, store ) );
if ( transport instanceof UdpTransport )
{
// Allow the port to be reused even if the socket is in TIME_WAIT state
((DatagramSessionConfig)acceptor.getSessionConfig()).setReuseAddress( true );
}
else
{
// Disable the disconnection of the clients on unbind
acceptor.setCloseOnDeactivation( false );
// Allow the port to be reused even if the socket is in TIME_WAIT state
((NioSocketAcceptor)acceptor).setReuseAddress( true );
// No Nagle's algorithm
((NioSocketAcceptor)acceptor).getSessionConfig().setTcpNoDelay( true );
}
// Start the listener
acceptor.bind();
}
}
LOG.info( "DNS service started." );
System.out.println( "DNS service started." );
}
public void stop() {
for ( Transport transport :getTransports() )
{
IoAcceptor acceptor = transport.getAcceptor();
if ( acceptor != null )
{
acceptor.dispose();
}
}
LOG.info( "DNS service stopped." );
System.out.println( "DNS service stopped." );
}
/**
* @see Object#toString()
*/
public String toString()
{
StringBuilder sb = new StringBuilder();
sb.append( "DNSServer[" ).append( getServiceName() ).append( "], listening on :" ).append( '\n' );
if ( getTransports() != null )
{
for ( Transport transport:getTransports() )
{
sb.append( " " ).append( transport ).append( '\n' );
}
}
return sb.toString();
}
}