/*
* 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.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetSocketAddress;
import com.aelitis.azureus.core.dht.DHT;
import com.aelitis.azureus.core.dht.transport.DHTTransportContact;
import com.aelitis.azureus.core.dht.transport.udp.DHTTransportUDP;
import com.aelitis.azureus.core.dht.transport.udp.impl.packethandler.DHTUDPPacketNetworkHandler;
import com.aelitis.azureus.core.dht.netcoords.*;
import com.aelitis.net.udp.uc.PRUDPPacketReply;
/**
* @author parg
*
*/
public class
DHTUDPPacketReply
extends PRUDPPacketReply
implements DHTUDPPacket
{
public static final int DHT_HEADER_SIZE =
PRUDPPacketReply.PR_HEADER_SIZE +
8 + // con id
1 + // ver
1 + // net
4; // instance
private DHTTransportUDPImpl transport;
private long connection_id;
private byte protocol_version;
private byte vendor_id = DHTTransportUDP.VENDOR_ID_NONE;
private int network;
private int target_instance_id;
private long skew;
private DHTNetworkPosition[] network_positions;
public
DHTUDPPacketReply(
DHTTransportUDPImpl _transport,
int _type,
int _trans_id,
long _conn_id,
DHTTransportContact _local_contact,
DHTTransportContact _remote_contact )
{
super( _type, _trans_id );
transport = _transport;
connection_id = _conn_id;
protocol_version = _remote_contact.getProtocolVersion();
// the target might be at a higher protocol version that us, so trim back if necessary
// as we obviously can't talk a higher version than what we are!
if ( protocol_version > _transport.getProtocolVersion()){
protocol_version = _transport.getProtocolVersion();
}
target_instance_id = _local_contact.getInstanceID();
skew = _remote_contact.getClockSkew();
}
protected
DHTUDPPacketReply(
DHTUDPPacketNetworkHandler network_handler,
InetSocketAddress originator,
DataInputStream is,
int type,
int trans_id )
throws IOException
{
super( type, trans_id );
setAddress( originator );
connection_id = is.readLong();
protocol_version = is.readByte();
if ( protocol_version >= DHTTransportUDP.PROTOCOL_VERSION_VENDOR_ID ){
vendor_id = is.readByte();
}
if ( protocol_version >= DHTTransportUDP.PROTOCOL_VERSION_NETWORKS ){
network = is.readInt();
}
if ( protocol_version < ( network == DHT.NW_CVS?DHTTransportUDP.PROTOCOL_VERSION_MIN_CVS:DHTTransportUDP.PROTOCOL_VERSION_MIN )){
throw( new IOException( "Invalid DHT protocol version, please update Azureus" ));
}
// we can only get the correct transport after decoding the network...
transport = network_handler.getTransport( this );
target_instance_id = is.readInt();
}
public DHTTransportUDPImpl
getTransport()
{
return( transport );
}
protected int
getTargetInstanceID()
{
return( target_instance_id );
}
public long
getConnectionId()
{
return( connection_id );
}
protected long
getClockSkew()
{
return( skew );
}
public byte
getProtocolVersion()
{
return( protocol_version );
}
protected byte
getVendorID()
{
return( vendor_id );
}
public int
getNetwork()
{
return( network );
}
public void
setNetwork(
int _network )
{
network = _network;
}
protected DHTNetworkPosition[]
getNetworkPositions()
{
return( network_positions );
}
protected void
setNetworkPositions(
DHTNetworkPosition[] _network_positions )
{
network_positions = _network_positions;
}
public void
serialise(
DataOutputStream os )
throws IOException
{
super.serialise(os);
// add to this and you need to adjust HEADER_SIZE above
os.writeLong( connection_id );
os.writeByte( protocol_version );
if ( protocol_version >= DHTTransportUDP.PROTOCOL_VERSION_VENDOR_ID ){
os.writeByte( DHTTransportUDP.VENDOR_ID_ME );
}
if ( protocol_version >= DHTTransportUDP.PROTOCOL_VERSION_NETWORKS ){
os.writeInt( network );
}
os.writeInt( target_instance_id );
}
public String
getString()
{
return( super.getString() + ",[con="+connection_id+",prot=" + protocol_version + ",ven=" + vendor_id + ",net="+network+"]");
}
}