/*
* Created on 17 Sep 2007
* Created by Allan Crooks
* Copyright (C) 2007 Aelitis, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* AELITIS, SAS au capital de 46,603.30 euros
* 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
*/
package com.aelitis.azureus.core.peermanager.messaging.bittorrent.ltep;
import java.util.HashMap;
import java.util.Map;
import org.gudy.azureus2.core3.util.DirectByteBuffer;
import com.aelitis.azureus.core.peermanager.messaging.Message;
import com.aelitis.azureus.core.peermanager.messaging.MessageException;
import com.aelitis.azureus.core.peermanager.messaging.MessageManager;
import com.aelitis.azureus.core.peermanager.messaging.bittorrent.BTMessageDecoder;
/**
* @author Allan Crooks
*
*/
public class LTMessageDecoder extends BTMessageDecoder {
private Map<Byte,byte[]> entension_handlers = new HashMap<Byte, byte[]>();
public LTMessageDecoder() {}
protected Message createMessage(DirectByteBuffer ref_buff) throws MessageException {
// Check to see if it is a LT-extension message. If not, delegate to BTMessageDecoder.
int old_position = ref_buff.position(DirectByteBuffer.SS_MSG);
byte id = ref_buff.get(DirectByteBuffer.SS_MSG);
if (id != 20) {
ref_buff.position(DirectByteBuffer.SS_MSG, old_position);
return super.createMessage(ref_buff);
}
// Here is where we decode the message.
id = ref_buff.get(DirectByteBuffer.SS_MSG);
switch(id) {
case 0:
return MessageManager.getSingleton().createMessage(LTMessage.ID_LT_HANDSHAKE_BYTES, ref_buff, (byte)1);
case 1:
return MessageManager.getSingleton().createMessage(LTMessage.ID_UT_PEX_BYTES, ref_buff, (byte)1);
case 3:
return MessageManager.getSingleton().createMessage(LTMessage.ID_UT_METADATA_BYTES, ref_buff, (byte)1);
case 4:
return MessageManager.getSingleton().createMessage(LTMessage.ID_UT_UPLOAD_ONLY_BYTES, ref_buff, (byte)1);
default: {
byte[] message_id;
synchronized( entension_handlers ){
message_id = entension_handlers.get( id );
}
if ( message_id != null ){
return MessageManager.getSingleton().createMessage( message_id, ref_buff, (byte)1);
}
System.out.println( "Unknown LTEP message id [" +id+ "]" );
throw new MessageException( "Unknown LTEP message id [" +id+ "]" );
}
}
}
public void
addExtensionHandler(
byte id,
byte[] message_id )
{
synchronized( entension_handlers ){
entension_handlers.put( id, message_id );
}
}
}