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 org.apache.directory.server.dns.messages.ResourceRecord;
025    import org.apache.directory.server.dns.store.DnsAttribute;
026    import org.apache.mina.core.buffer.IoBuffer;
027    
028    
029    /**
030     * 3.3.11. NS RDATA format
031     * 
032     *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
033     *     /                   NSDNAME                     /
034     *     /                                               /
035     *     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
036     * 
037     * where:
038     * 
039     * NSDNAME         A <domain-name> which specifies a host which should be
040     *                 authoritative for the specified class and domain.
041     * 
042     * NS records cause both the usual additional section processing to locate
043     * a type A record, and, when used in a referral, a special search of the
044     * zone in which they reside for glue information.
045     * 
046     * The NS RR states that the named host should be expected to have a zone
047     * starting at owner name of the specified class.  Note that the class may
048     * not indicate the protocol family which should be used to communicate
049     * with the host, although it is typically a strong hint.  For example,
050     * hosts which are name servers for either Internet (IN) or Hesiod (HS)
051     * class information are normally queried using IN class protocols.
052     * 
053     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
054     * @version $Rev: 725712 $, $Date: 2008-12-11 17:32:04 +0200 (Thu, 11 Dec 2008) $
055     */
056    public class NameServerRecordEncoder extends ResourceRecordEncoder
057    {
058        protected void putResourceRecordData( IoBuffer byteBuffer, ResourceRecord record )
059        {
060            String domainName = record.get( DnsAttribute.DOMAIN_NAME );
061    
062            putDomainName( byteBuffer, domainName );
063        }
064    }