001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one
003     *  or more contributor license agreements.  See the NOTICE file
004     *  distributed with this work for additional information
005     *  regarding copyright ownership.  The ASF licenses this file
006     *  to you under the Apache License, Version 2.0 (the
007     *  "License"); you may not use this file except in compliance
008     *  with the License.  You may obtain a copy of the License at
009     *  
010     *    http://www.apache.org/licenses/LICENSE-2.0
011     *  
012     *  Unless required by applicable law or agreed to in writing,
013     *  software distributed under the License is distributed on an
014     *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     *  KIND, either express or implied.  See the License for the
016     *  specific language governing permissions and limitations
017     *  under the License. 
018     *  
019     */
020    
021    package org.apache.directory.server.dns.io.encoder;
022    
023    
024    import java.net.InetAddress;
025    import java.net.UnknownHostException;
026    
027    import org.apache.directory.server.dns.messages.ResourceRecord;
028    import org.apache.directory.server.dns.store.DnsAttribute;
029    import org.apache.mina.core.buffer.IoBuffer;
030    
031    
032    /**
033     * 3.4.1. A RDATA format
034     * 
035     *  +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
036     *  |                    ADDRESS                    |
037     *  +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
038     * 
039     * where:
040     * 
041     * ADDRESS         A 32 bit Internet address.
042     * 
043     * Hosts that have multiple Internet addresses will have multiple A
044     * records.
045     * 
046     * A records cause no additional section processing.  The RDATA section of
047     * an A line in a master file is an Internet address expressed as four
048     * decimal numbers separated by dots without any imbedded spaces (e.g.,
049     * "10.2.0.52" or "192.0.5.6").
050     * 
051     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
052     * @version $Rev: 725712 $, $Date: 2008-12-11 16:32:04 +0100 (Thu, 11 Dec 2008) $
053     */
054    public class AddressRecordEncoder extends ResourceRecordEncoder
055    {
056        protected void putResourceRecordData( IoBuffer byteBuffer, ResourceRecord record )
057        {
058            String ipAddress = record.get( DnsAttribute.IP_ADDRESS );
059    
060            try
061            {
062                byteBuffer.put( InetAddress.getByName( ipAddress ).getAddress() );
063            }
064            catch ( UnknownHostException uhe )
065            {
066            }
067        }
068    }