/*
* 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.shared.kerberos.codec.actions;
import org.apache.directory.shared.asn1.DecoderException;
import org.apache.directory.shared.asn1.ber.Asn1Container;
import org.apache.directory.shared.asn1.ber.Asn1Decoder;
import org.apache.directory.shared.asn1.ber.grammar.GrammarAction;
import org.apache.directory.shared.asn1.ber.tlv.TLV;
import org.apache.directory.shared.i18n.I18n;
import org.apache.directory.shared.kerberos.codec.hostAddress.HostAddressContainer;
import org.apache.directory.shared.kerberos.components.HostAddress;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The action used to read the HostAddress
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public abstract class AbstractReadHostAddress<E extends Asn1Container> extends GrammarAction<E>
{
/** The logger */
private static final Logger LOG = LoggerFactory.getLogger( AbstractReadHostAddress.class );
/** Speedup for logs */
private static final boolean IS_DEBUG = LOG.isDebugEnabled();
/**
* Instantiates a new AbstractReadAddress action.
*/
public AbstractReadHostAddress( String name )
{
super( name );
}
protected abstract void setAddress( HostAddress hostAddress, E container );
/**
* {@inheritDoc}
*/
public void action( E container ) throws DecoderException
{
TLV tlv = container.getCurrentTLV();
// The Length should not be null
if ( tlv.getLength() == 0 )
{
LOG.error( I18n.err( I18n.ERR_04066 ) );
// This will generate a PROTOCOL_ERROR
throw new DecoderException( I18n.err( I18n.ERR_04067 ) );
}
// Now, let's decode the HostAddress
Asn1Decoder hostAddressDecoder = new Asn1Decoder();
HostAddressContainer hostAddressContainer = new HostAddressContainer();
// Passes the Stream to the decoder
hostAddressContainer.setStream( container.getStream() );
// Decode the HostAddress PDU
try
{
hostAddressDecoder.decode( container.getStream(), hostAddressContainer );
}
catch ( DecoderException de )
{
throw de;
}
// Store the HostAddress in the container
HostAddress hostAddress = hostAddressContainer.getHostAddress();
// Update the expected length for the current TLV
tlv.setExpectedLength( tlv.getExpectedLength() - tlv.getLength() );
// Update the parent
container.updateParent();
setAddress( hostAddress, container );
if ( IS_DEBUG )
{
LOG.debug( "HostAddress : {}", hostAddress );
}
}
}