/*
* Created on Apr 30, 2004
* Created by Alon Rohter
* 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.peermanager.messaging.azureus;
import java.util.*;
import org.gudy.azureus2.core3.util.*;
import com.aelitis.azureus.core.peermanager.messaging.Message;
import com.aelitis.azureus.core.peermanager.messaging.MessageException;
import com.aelitis.azureus.core.peermanager.messaging.MessagingUtil;
/**
* AZ handshake message.
*/
public class AZHandshake implements AZMessage {
public static final int HANDSHAKE_TYPE_PLAIN = 0;
public static final int HANDSHAKE_TYPE_CRYPTO = 1;
private static final byte bss = DirectByteBuffer.SS_MSG;
private final byte version;
private DirectByteBuffer buffer = null;
private String description = null;
private final byte[] identity;
private final String client;
private final String client_version;
private final String[] avail_ids;
private final byte[] avail_versions;
private int tcp_port;
private int udp_port;
private int udp_non_data_port;
private final int handshake_type;
public AZHandshake( byte[] peer_identity,
String _client,
String version,
int tcp_listen_port,
int udp_listen_port,
int udp_non_data_listen_port,
String[] avail_msg_ids,
byte[] avail_msg_versions,
int _handshake_type,
byte _version ) {
this.identity = peer_identity;
this.client = _client;
this.client_version = version;
this.avail_ids = avail_msg_ids;
this.avail_versions = avail_msg_versions;
this.tcp_port = tcp_listen_port;
this.udp_port = udp_listen_port;
this.udp_non_data_port = udp_non_data_listen_port;
this.handshake_type = _handshake_type;
this.version = _version;
//verify given port info is ok
if( tcp_port < 0 || tcp_port > 65535 ) {
Debug.out( "given TCP listen port is invalid: " +tcp_port );
tcp_port = 0;
}
if( udp_port < 0 || udp_port > 65535 ) {
Debug.out( "given UDP listen port is invalid: " +udp_port );
udp_port = 0;
}
if( udp_non_data_port < 0 || udp_non_data_port > 65535 ) {
Debug.out( "given UDP non-data listen port is invalid: " +udp_non_data_port );
udp_non_data_port = 0;
}
}
public byte[] getIdentity() { return identity; }
public String getClient() { return client; }
public String getClientVersion() { return client_version; }
public String[] getMessageIDs() { return avail_ids; }
public byte[] getMessageVersions() { return avail_versions; }
public int getTCPListenPort() { return tcp_port; }
public int getUDPListenPort() { return udp_port; }
public int getUDPNonDataListenPort() { return udp_non_data_port; }
public int getHandshakeType() { return handshake_type; }
public String getID() { return AZMessage.ID_AZ_HANDSHAKE; }
public byte[] getIDBytes() { return AZMessage.ID_AZ_HANDSHAKE_BYTES; }
public String getFeatureID() { return AZMessage.AZ_FEATURE_ID; }
public int getFeatureSubID() { return AZMessage.SUBID_AZ_HANDSHAKE; }
public int getType() { return Message.TYPE_PROTOCOL_PAYLOAD; }
public byte getVersion() { return version; };
public String getDescription() {
if( description == null ) {
String msgs_desc = "";
for( int i=0; i < avail_ids.length; i++ ) {
String id = avail_ids[ i ];
byte ver = avail_versions[ i ];
if( id.equals( getID() ) ) continue; //skip ourself
msgs_desc += "[" +id+ ":" +ver+ "]";
}
description = getID()+ " from [" +ByteFormatter.nicePrint( identity, true )+ ", " +
client+ " " +client_version+ ", TCP/UDP ports " +tcp_port+ "/" +udp_port+ "/" + udp_non_data_port +
", handshake " + (getHandshakeType() == HANDSHAKE_TYPE_PLAIN ? "plain" : "crypto") +
"] supports " +msgs_desc;
}
return description;
}
public DirectByteBuffer[] getData() {
if( buffer == null ) {
Map payload_map = new HashMap();
//client info
payload_map.put( "identity", identity );
payload_map.put( "client", client );
payload_map.put( "version", client_version );
payload_map.put( "tcp_port", new Long( tcp_port ) );
payload_map.put( "udp_port", new Long( udp_port ) );
payload_map.put( "udp2_port", new Long( udp_non_data_port ) );
payload_map.put( "handshake_type", new Long( handshake_type ) );
//available message list
List message_list = new ArrayList();
for( int i=0; i < avail_ids.length; i++ ) {
String id = avail_ids[ i ];
byte ver = avail_versions[ i ];
if( id.equals( getID() )) continue; //skip ourself
Map msg = new HashMap();
msg.put( "id", id );
msg.put( "ver", new byte[]{ ver } );
message_list.add( msg );
}
payload_map.put( "messages", message_list );
// random padding if crypto
if ( handshake_type == AZHandshake.HANDSHAKE_TYPE_CRYPTO ){
payload_map.put( "pad", new byte[(int)( Math.random() * AZMessageFactory.AZ_HANDSHAKE_PAD_MAX )]);
}
buffer = MessagingUtil.convertPayloadToBencodedByteStream( payload_map, DirectByteBuffer.AL_MSG_AZ_HAND );
if( buffer.remaining( bss ) > 1200 ) System.out.println( "Generated AZHandshake size = " +buffer.remaining( bss )+ " bytes" );
}
return new DirectByteBuffer[]{ buffer };
}
public Message deserialize( DirectByteBuffer data, byte version ) throws MessageException {
Map root = MessagingUtil.convertBencodedByteStreamToPayload( data, 100, getID() );
byte[] id = (byte[])root.get( "identity" );
if( id == null ) throw new MessageException( "id == null" );
if( id.length != 20 ) throw new MessageException( "id.length != 20: " +id.length );
byte[] raw_name = (byte[])root.get( "client" );
if( raw_name == null ) throw new MessageException( "raw_name == null" );
String name = new String( raw_name );
byte[] raw_ver = (byte[])root.get( "version" );
if( raw_ver == null ) throw new MessageException( "raw_ver == null" );
String client_version = new String( raw_ver );
Long tcp_lport = (Long)root.get( "tcp_port" );
if( tcp_lport == null ) { //old handshake
tcp_lport = new Long( 0 );
}
Long udp_lport = (Long)root.get( "udp_port" );
if( udp_lport == null ) { //old handshake
udp_lport = new Long( 0 );
}
Long udp2_lport = (Long)root.get( "udp2_port" );
if( udp2_lport == null ) { //old handshake
udp2_lport = udp_lport;
}
Long h_type = (Long)root.get( "handshake_type" );
if( h_type == null ) { //only 2307+ send type
h_type = new Long( HANDSHAKE_TYPE_PLAIN );
}
List raw_msgs = (List) root.get("messages");
if (raw_msgs == null) throw new MessageException("raw_msgs == null");
String[] ids = new String[raw_msgs.size()];
byte[] vers = new byte[raw_msgs.size()];
int pos = 0;
for (Iterator i = raw_msgs.iterator(); i.hasNext();) {
Map msg = (Map) i.next();
byte[] mid = (byte[]) msg.get("id");
if (mid == null) throw new MessageException("mid == null");
ids[pos] = new String(mid);
byte[] ver = (byte[]) msg.get("ver");
if (ver == null) throw new MessageException("ver == null");
if (ver.length != 1) throw new MessageException("ver.length != 1");
vers[pos] = ver[0];
pos++;
}
return new AZHandshake( id, name, client_version, tcp_lport.intValue(), udp_lport.intValue(), udp2_lport.intValue(), ids, vers, h_type.intValue(), version );
}
public void destroy() {
if( buffer != null ) buffer.returnToPool();
}
}
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