/*
* 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.kerberos.protocol.codec;
import java.io.IOException;
import org.apache.directory.api.asn1.AbstractAsn1Object;
import org.apache.directory.api.asn1.EncoderException;
import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolEncoderAdapter;
import org.apache.mina.filter.codec.ProtocolEncoderOutput;
/**
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class KerberosEncoder extends ProtocolEncoderAdapter
{
public void encode( IoSession session, Object message, ProtocolEncoderOutput out ) throws IOException
{
AbstractAsn1Object asn1Obj = ( AbstractAsn1Object ) message;
boolean isTcp = !session.getTransportMetadata().isConnectionless();
IoBuffer response = null;
IoBuffer kerberosMessage = null;
int responseLength = asn1Obj.computeLength();
kerberosMessage = IoBuffer.allocate( responseLength );
if ( isTcp )
{
response = IoBuffer.allocate( responseLength + 4 );
}
else
{
response = kerberosMessage;
}
try
{
asn1Obj.encode( kerberosMessage.buf() );
if ( isTcp )
{
response.putInt( responseLength );
response.put( kerberosMessage.buf().array() );
}
response.flip();
out.write( response );
}
catch ( EncoderException e )
{
throw new IOException( e.getMessage() );
}
}
}