/*
* Created on Feb 24, 2005
* Created by Alon Rohter
* Copyright (C) 2004-2005 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 org.gudy.azureus2.pluginsimpl.local.messaging;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.util.*;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.core3.util.SHA1Simple;
import org.gudy.azureus2.plugins.PluginInterface;
import org.gudy.azureus2.plugins.download.*;
import org.gudy.azureus2.plugins.messaging.*;
import org.gudy.azureus2.plugins.messaging.generic.GenericMessageConnection;
import org.gudy.azureus2.plugins.messaging.generic.GenericMessageEndpoint;
import org.gudy.azureus2.plugins.messaging.generic.GenericMessageHandler;
import org.gudy.azureus2.plugins.messaging.generic.GenericMessageRegistration;
import org.gudy.azureus2.plugins.peers.*;
import com.aelitis.azureus.core.AzureusCore;
import com.aelitis.azureus.core.nat.NATTraversalHandler;
import com.aelitis.azureus.core.nat.NATTraverser;
import com.aelitis.azureus.core.networkmanager.NetworkConnection;
import com.aelitis.azureus.core.networkmanager.NetworkManager;
import com.aelitis.azureus.core.networkmanager.impl.TransportHelper;
import com.aelitis.azureus.core.peermanager.messaging.MessageStreamDecoder;
import com.aelitis.azureus.core.peermanager.messaging.MessageStreamEncoder;
import com.aelitis.azureus.core.peermanager.messaging.MessageStreamFactory;
/**
*
*/
public class MessageManagerImpl implements MessageManager, NATTraversalHandler {
private static MessageManagerImpl instance;
private final HashMap compat_checks = new HashMap();
private final DownloadManagerListener download_manager_listener = new DownloadManagerListener() {
public void downloadAdded( Download dwnld ) {
dwnld.addPeerListener( new DownloadPeerListener() {
public void peerManagerAdded( final Download download, PeerManager peer_manager ) {
peer_manager.addListener( new PeerManagerListener() {
public void peerAdded( PeerManager manager, final Peer peer ) {
peer.addListener( new PeerListener() {
public void stateChanged( int new_state ) {
if( new_state == Peer.TRANSFERING ) { //the peer handshake has completed
if( peer.supportsMessaging() ) { //if it supports advanced messaging
//see if it supports any registered message types
Message[] messages = peer.getSupportedMessages();
for( int i=0; i < messages.length; i++ ) {
Message msg = messages[i];
for( Iterator it = compat_checks.entrySet().iterator(); it.hasNext(); ) {
Map.Entry entry = (Map.Entry)it.next();
Message message = (Message)entry.getKey();
if( msg.getID().equals( message.getID() ) ) { //it does !
MessageManagerListener listener = (MessageManagerListener)entry.getValue();
listener.compatiblePeerFound( download, peer, message );
}
}
}
}
}
}
public void sentBadChunk( int piece_num, int total_bad_chunks ) { /*nothing*/ }
});
}
public void peerRemoved( PeerManager manager, Peer peer ) {
for( Iterator i = compat_checks.values().iterator(); i.hasNext(); ) {
MessageManagerListener listener = (MessageManagerListener)i.next();
listener.peerRemoved( download, peer );
}
}
});
}
public void peerManagerRemoved( Download download, PeerManager peer_manager ) { /* nothing */ }
});
}
public void downloadRemoved( Download download ) { /* nothing */ }
};
public static synchronized MessageManagerImpl
getSingleton(AzureusCore core)
{
if ( instance == null ){
instance = new MessageManagerImpl( core );
}
return instance;
}
private AzureusCore core;
private Map message_handlers = new HashMap();
private MessageManagerImpl(AzureusCore _core ) {
core = _core;
core.getNATTraverser().registerHandler( this );
}
public NATTraverser
getNATTraverser()
{
return( core.getNATTraverser());
}
public void registerMessageType( Message message ) throws MessageException {
try {
com.aelitis.azureus.core.peermanager.messaging.MessageManager.getSingleton().registerMessageType( new MessageAdapter( message ) );
}
catch( com.aelitis.azureus.core.peermanager.messaging.MessageException me ) {
throw new MessageException( me.getMessage() );
}
}
public void deregisterMessageType( Message message ) {
com.aelitis.azureus.core.peermanager.messaging.MessageManager.getSingleton().deregisterMessageType( new MessageAdapter( message ) );
}
public void locateCompatiblePeers( PluginInterface plug_interface, Message message, MessageManagerListener listener ) {
compat_checks.put( message, listener ); //TODO need to copy-on-write?
if( compat_checks.size() == 1 ) { //only register global peer locator listener once
plug_interface.getDownloadManager().addListener( download_manager_listener );
}
}
public void cancelCompatiblePeersLocation( MessageManagerListener orig_listener ) {
for( Iterator it = compat_checks.values().iterator(); it.hasNext(); ) {
MessageManagerListener listener = (MessageManagerListener)it.next();
if( listener == orig_listener ) {
it.remove();
break;
}
}
}
public GenericMessageRegistration
registerGenericMessageType(
final String _type,
final String description,
final int stream_crypto,
final GenericMessageHandler handler )
throws MessageException
{
final String type = "AEGEN:" + _type;
final byte[] type_bytes = type.getBytes();
final byte[][] shared_secrets = new byte[][]{ new SHA1Simple().calculateHash( type_bytes ) };
synchronized( message_handlers ){
message_handlers.put( type, handler );
}
final NetworkManager.ByteMatcher matcher =
new NetworkManager.ByteMatcher()
{
public int
matchThisSizeOrBigger()
{
return( maxSize());
}
public int
maxSize()
{
return type_bytes.length;
}
public int
minSize()
{
return maxSize();
}
public Object
matches(
TransportHelper transport, ByteBuffer to_compare, int port )
{
int old_limit = to_compare.limit();
to_compare.limit( to_compare.position() + maxSize() );
boolean matches = to_compare.equals( ByteBuffer.wrap( type_bytes ) );
to_compare.limit( old_limit ); //restore buffer structure
return matches?"":null;
}
public Object
minMatches(
TransportHelper transport, ByteBuffer to_compare, int port )
{
return( matches( transport, to_compare, port ));
}
public byte[][]
getSharedSecrets()
{
return( shared_secrets );
}
public int
getSpecificPort()
{
return( -1 );
}
};
NetworkManager.getSingleton().requestIncomingConnectionRouting(
matcher,
new NetworkManager.RoutingListener()
{
public void
connectionRouted(
final NetworkConnection connection, Object routing_data )
{
try{
ByteBuffer[] skip_buffer = { ByteBuffer.allocate(type_bytes.length) };
connection.getTransport().read( skip_buffer, 0, 1 );
if ( skip_buffer[0].remaining() != 0 ){
Debug.out( "incomplete read" );
}
GenericMessageEndpointImpl endpoint = new GenericMessageEndpointImpl( connection.getEndpoint());
GenericMessageConnectionDirect direct_connection =
GenericMessageConnectionDirect.receive(
endpoint,
type,
description,
stream_crypto,
shared_secrets );
GenericMessageConnectionImpl new_connection = new GenericMessageConnectionImpl( MessageManagerImpl.this, direct_connection );
direct_connection.connect( connection );
if ( handler.accept( new_connection )){
new_connection.accepted();
}else{
connection.close( "connection not accepted" );
}
}catch( Throwable e ){
Debug.printStackTrace(e);
connection.close( e==null?null:Debug.getNestedExceptionMessage(e));
}
}
public boolean
autoCryptoFallback()
{
return( stream_crypto != MessageManager.STREAM_ENCRYPTION_RC4_REQUIRED );
}
},
new MessageStreamFactory() {
public MessageStreamEncoder createEncoder() { return new GenericMessageEncoder();}
public MessageStreamDecoder createDecoder() { return new GenericMessageDecoder(type, description);}
});
return(
new GenericMessageRegistration()
{
public GenericMessageEndpoint
createEndpoint(
InetSocketAddress notional_target )
{
return( new GenericMessageEndpointImpl( notional_target ));
}
public GenericMessageConnection
createConnection(
GenericMessageEndpoint endpoint )
throws MessageException
{
return( new GenericMessageConnectionImpl( MessageManagerImpl.this, type, description, (GenericMessageEndpointImpl)endpoint, stream_crypto, shared_secrets ));
}
public void
cancel()
{
NetworkManager.getSingleton().cancelIncomingConnectionRouting( matcher );
synchronized( message_handlers ){
message_handlers.remove( type );
}
}
});
}
protected GenericMessageHandler
getHandler(
String type )
{
synchronized( message_handlers ){
return((GenericMessageHandler)message_handlers.get( type ));
}
}
/* NATTraversalHandler methods
*/
public int
getType()
{
return( NATTraverser.TRAVERSE_REASON_GENERIC_MESSAGING );
}
public String
getName()
{
return( "Generic Messaging" );
}
public Map
process(
InetSocketAddress originator,
Map message )
{
return( GenericMessageConnectionIndirect.receive( this, originator, message ));
}
}