/*
* Created on 21-Jan-2005
* Created by Paul Gardner
* Copyright (C) 2004, 2005, 2006 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.dht.transport.udp.impl;
import java.io.*;
import java.util.*;
import com.aelitis.azureus.core.dht.transport.udp.impl.packethandler.DHTUDPPacketNetworkHandler;
import com.aelitis.net.udp.uc.PRUDPPacketHandler;
import com.aelitis.net.udp.uc.PRUDPPacketReply;
import com.aelitis.net.udp.uc.PRUDPPacketReplyDecoder;
import com.aelitis.net.udp.uc.PRUDPPacketRequest;
import com.aelitis.net.udp.uc.PRUDPPacketRequestDecoder;
/**
* @author parg
*
*/
public class
DHTUDPPacketHelper
{
public static final int PACKET_MAX_BYTES = 1400;
// these actions have to co-exist with the tracker ones when the connection
// is shared, hence 1024
public static final int ACT_REQUEST_PING = 1024;
public static final int ACT_REPLY_PING = 1025;
public static final int ACT_REQUEST_STORE = 1026;
public static final int ACT_REPLY_STORE = 1027;
public static final int ACT_REQUEST_FIND_NODE = 1028;
public static final int ACT_REPLY_FIND_NODE = 1029;
public static final int ACT_REQUEST_FIND_VALUE = 1030;
public static final int ACT_REPLY_FIND_VALUE = 1031;
public static final int ACT_REPLY_ERROR = 1032;
public static final int ACT_REPLY_STATS = 1033;
public static final int ACT_REQUEST_STATS = 1034;
public static final int ACT_DATA = 1035;
public static final int ACT_REQUEST_KEY_BLOCK = 1036;
public static final int ACT_REPLY_KEY_BLOCK = 1037;
private static boolean registered = false;
protected static void
registerCodecs()
{
if ( registered ){
return;
}
registered = true;
PRUDPPacketRequestDecoder request_decoder =
new PRUDPPacketRequestDecoder()
{
public PRUDPPacketRequest
decode(
PRUDPPacketHandler handler,
DataInputStream is,
long connection_id,
int action,
int transaction_id )
throws IOException
{
if ( handler == null ){
// most likely cause is DHT packet ending up on the UDP tracker as it'll get
// router here but with a null-handler
throw( new IOException( "No handler available for DHT packet decode" ));
}
DHTUDPPacketNetworkHandler network_handler = (DHTUDPPacketNetworkHandler)handler.getRequestHandler();
if ( network_handler == null ){
// we an get this after a port change and the old port listener is still running (e.g.
// its still doing UDP tracker)
throw( new IOException( "No network handler available for DHT packet decode" ));
}
switch( action ){
case ACT_REQUEST_PING:
{
return( new DHTUDPPacketRequestPing(network_handler,is, connection_id,transaction_id));
}
case ACT_REQUEST_STORE:
{
return( new DHTUDPPacketRequestStore(network_handler,is, connection_id,transaction_id));
}
case ACT_REQUEST_FIND_NODE:
{
return( new DHTUDPPacketRequestFindNode(network_handler,is, connection_id,transaction_id));
}
case ACT_REQUEST_FIND_VALUE:
{
return( new DHTUDPPacketRequestFindValue(network_handler,is, connection_id,transaction_id));
}
case ACT_REQUEST_STATS:
{
return( new DHTUDPPacketRequestStats(network_handler,is, connection_id, transaction_id));
}
case ACT_DATA:
{
return( new DHTUDPPacketData(network_handler,is, connection_id, transaction_id));
}
case ACT_REQUEST_KEY_BLOCK:
{
return( new DHTUDPPacketRequestKeyBlock(network_handler,is, connection_id, transaction_id));
}
default:
{
throw( new IOException( "Unknown action type" ));
}
}
}
};
Map request_decoders = new HashMap();
request_decoders.put( new Integer( ACT_REQUEST_PING ), request_decoder );
request_decoders.put( new Integer( ACT_REQUEST_STORE ), request_decoder );
request_decoders.put( new Integer( ACT_REQUEST_FIND_NODE ), request_decoder );
request_decoders.put( new Integer( ACT_REQUEST_FIND_VALUE ), request_decoder );
request_decoders.put( new Integer( ACT_REQUEST_STATS ), request_decoder );
request_decoders.put( new Integer( ACT_DATA ), request_decoder );
request_decoders.put( new Integer( ACT_REQUEST_KEY_BLOCK ), request_decoder );
PRUDPPacketRequest.registerDecoders( request_decoders );
PRUDPPacketReplyDecoder reply_decoder =
new PRUDPPacketReplyDecoder()
{
public PRUDPPacketReply
decode(
PRUDPPacketHandler handler,
DataInputStream is,
int action,
int transaction_id )
throws IOException
{
if ( handler == null ){
// most likely cause is DHT packet ending up on the UDP tracker as it'll get
// router here but with a null-handler
throw( new IOException( "No handler available for DHT packet decode" ));
}
DHTUDPPacketNetworkHandler network_handler = (DHTUDPPacketNetworkHandler)handler.getRequestHandler();
if ( network_handler == null ){
// we an get this after a port change and the old port listener is still running (e.g.
// its still doing UDP tracker)
throw( new IOException( "No network handler available for DHT packet decode" ));
}
switch( action ){
case ACT_REPLY_PING:
{
return( new DHTUDPPacketReplyPing(network_handler,is, transaction_id));
}
case ACT_REPLY_STORE:
{
return( new DHTUDPPacketReplyStore(network_handler,is, transaction_id));
}
case ACT_REPLY_FIND_NODE:
{
return( new DHTUDPPacketReplyFindNode(network_handler, is, transaction_id));
}
case ACT_REPLY_FIND_VALUE:
{
return( new DHTUDPPacketReplyFindValue(network_handler, is, transaction_id));
}
case ACT_REPLY_ERROR:
{
return( new DHTUDPPacketReplyError(network_handler, is, transaction_id));
}
case ACT_REPLY_STATS:
{
return( new DHTUDPPacketReplyStats( network_handler, is, transaction_id));
}
case ACT_REPLY_KEY_BLOCK:
{
return( new DHTUDPPacketReplyKeyBlock( network_handler, is, transaction_id));
}
default:
{
throw( new IOException( "Unknown action type" ));
}
}
}
};
Map reply_decoders = new HashMap();
reply_decoders.put( new Integer( ACT_REPLY_PING ), reply_decoder );
reply_decoders.put( new Integer( ACT_REPLY_STORE ), reply_decoder );
reply_decoders.put( new Integer( ACT_REPLY_FIND_NODE ), reply_decoder );
reply_decoders.put( new Integer( ACT_REPLY_FIND_VALUE ), reply_decoder );
reply_decoders.put( new Integer( ACT_REPLY_ERROR ), reply_decoder );
reply_decoders.put( new Integer( ACT_REPLY_STATS ), reply_decoder );
reply_decoders.put( new Integer( ACT_REPLY_KEY_BLOCK ), reply_decoder );
PRUDPPacketReply.registerDecoders( reply_decoders );
}
}
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