/*
* Created on Jul 29, 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.networkmanager.impl;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.gudy.azureus2.core3.util.AddressUtils;
import org.gudy.azureus2.core3.util.Debug;
import com.aelitis.azureus.core.networkmanager.*;
import com.aelitis.azureus.core.networkmanager.Transport.ConnectListener;
import com.aelitis.azureus.core.peermanager.messaging.MessageStreamDecoder;
import com.aelitis.azureus.core.peermanager.messaging.MessageStreamEncoder;
/**
*
*/
public class
NetworkConnectionImpl
extends NetworkConnectionHelper
implements NetworkConnection
{
private final ConnectionEndpoint connection_endpoint;
private boolean connect_with_crypto;
private boolean allow_fallback;
private byte[][] shared_secrets;
private ConnectionListener connection_listener;
private boolean is_connected;
private byte is_lan_local = AddressUtils.LAN_LOCAL_MAYBE;
private final OutgoingMessageQueue outgoing_message_queue;
private final IncomingMessageQueueImpl incoming_message_queue;
private Transport transport;
private volatile ConnectionAttempt connection_attempt;
private volatile boolean closed;
/**
* Constructor for new OUTbound connection.
* The connection is not yet established upon instantiation; use connect() to do so.
* @param _remote_address to connect to
* @param encoder default message stream encoder to use for the outgoing queue
* @param decoder default message stream decoder to use for the incoming queue
*/
public NetworkConnectionImpl(
ConnectionEndpoint _target, MessageStreamEncoder encoder,
MessageStreamDecoder decoder, boolean _connect_with_crypto, boolean _allow_fallback,
byte[][] _shared_secrets )
{
connection_endpoint = _target;
connect_with_crypto = _connect_with_crypto;
allow_fallback = _allow_fallback;
shared_secrets = _shared_secrets;
is_connected = false;
outgoing_message_queue = new OutgoingMessageQueueImpl( encoder );
incoming_message_queue = new IncomingMessageQueueImpl( decoder, this );
}
/**
* Constructor for new INbound connection.
* The connection is assumed to be already established, by the given already-connected channel.
* @param _remote_channel connected by
* @param data_already_read bytestream already read during routing
* @param encoder default message stream encoder to use for the outgoing queue
* @param decoder default message stream decoder to use for the incoming queue
*/
public NetworkConnectionImpl( Transport _transport, MessageStreamEncoder encoder, MessageStreamDecoder decoder ) {
transport = _transport;
connection_endpoint = transport.getTransportEndpoint().getProtocolEndpoint().getConnectionEndpoint();
is_connected = true;
outgoing_message_queue = new OutgoingMessageQueueImpl( encoder );
outgoing_message_queue.setTransport( transport );
incoming_message_queue = new IncomingMessageQueueImpl( decoder, this );
}
public ConnectionEndpoint
getEndpoint()
{
return( connection_endpoint );
}
public void connect( ConnectionListener listener ) {
connect( null, listener );
}
public void connect( ByteBuffer initial_outbound_data, ConnectionListener listener ) {
this.connection_listener = listener;
if( is_connected ){
connection_listener.connectStarted();
connection_listener.connectSuccess( initial_outbound_data );
return;
}
if ( connection_attempt != null ){
Debug.out( "Connection attempt already active" );
listener.connectFailure( new Throwable( "Connection attempt already active" ));
return;
}
connection_attempt =
connection_endpoint.connectOutbound(
connect_with_crypto,
allow_fallback,
shared_secrets,
initial_outbound_data,
new Transport.ConnectListener() {
public void connectAttemptStarted() {
connection_listener.connectStarted();
}
public void connectSuccess( Transport _transport, ByteBuffer remaining_initial_data ) {
is_connected = true;
transport = _transport;
outgoing_message_queue.setTransport( transport );
connection_listener.connectSuccess( remaining_initial_data );
connection_attempt = null;
}
public void connectFailure( Throwable failure_msg ) {
is_connected = false;
connection_listener.connectFailure( failure_msg );
}
});
if ( closed ){
ConnectionAttempt ca = connection_attempt;
if ( ca != null ){
ca.abandon();
}
}
}
public Transport
detachTransport()
{
Transport t = transport;
transport = new bogusTransport( transport );
close();
return( t );
}
public void close() {
NetworkManager.getSingleton().stopTransferProcessing( this );
closed = true;
if ( connection_attempt != null ){
connection_attempt.abandon();
}
if ( transport != null ){
transport.close( "Tidy close" );
}
incoming_message_queue.destroy();
outgoing_message_queue.destroy();
is_connected = false;
}
public void notifyOfException( Throwable error ) {
if( connection_listener != null ) {
connection_listener.exceptionThrown( error );
}
else {
Debug.out( "notifyOfException():: connection_listener == null for exception: " +error.getMessage() );
}
}
public OutgoingMessageQueue getOutgoingMessageQueue() { return outgoing_message_queue; }
public IncomingMessageQueue getIncomingMessageQueue() { return incoming_message_queue; }
public void
startMessageProcessing()
{
NetworkManager.getSingleton().startTransferProcessing( this );
}
public void enableEnhancedMessageProcessing( boolean enable ) {
if( enable ) {
NetworkManager.getSingleton().upgradeTransferProcessing( this );
}
else {
NetworkManager.getSingleton().downgradeTransferProcessing( this );
}
}
public Transport getTransport() { return transport; }
public TransportBase getTransportBase() { return transport; }
public int
getMssSize()
{
if ( transport == null ){
return( NetworkManager.getMinMssSize());
}else{
return( transport.getMssSize());
}
}
public String toString() {
return( transport==null?connection_endpoint.getDescription():transport.getDescription() );
}
public boolean isConnected() {
return is_connected;
}
public boolean isLANLocal() {
if ( is_lan_local == AddressUtils.LAN_LOCAL_MAYBE ){
is_lan_local = AddressUtils.isLANLocalAddress( connection_endpoint.getNotionalAddress());
}
return( is_lan_local == AddressUtils.LAN_LOCAL_YES );
}
public String
getString()
{
return( "tran=" + (transport==null?"null":transport.getDescription()+",w_ready=" + transport.isReadyForWrite(null)+",r_ready=" + transport.isReadyForRead( null ))+ ",in=" + incoming_message_queue.getPercentDoneOfCurrentMessage() +
",out=" + outgoing_message_queue.getTotalSize() + ",owner=" + (connection_listener==null?"null":connection_listener.getDescription()));
}
protected static class
bogusTransport
implements Transport
{
private Transport transport;
protected
bogusTransport(
Transport _transport )
{
transport = _transport;
}
public boolean
isReadyForWrite(
EventWaiter waiter )
{
return( false );
}
public boolean
isReadyForRead(
EventWaiter waiter )
{
return( false );
}
public boolean
isTCP()
{
return( transport.isTCP());
}
public String
getDescription()
{
return( transport.getDescription());
}
public int
getMssSize()
{
return( transport.getMssSize());
}
public void
setAlreadyRead(
ByteBuffer bytes_already_read )
{
Debug.out( "Bogus Transport Operation" );
}
public TransportEndpoint
getTransportEndpoint()
{
return( transport.getTransportEndpoint());
}
public boolean
isEncrypted()
{
return( transport.isEncrypted());
}
public String
getEncryption()
{
return( transport.getEncryption());
}
public void
setReadyForRead()
{
Debug.out( "Bogus Transport Operation" );
}
public long
write(
ByteBuffer[] buffers,
int array_offset,
int length )
throws IOException
{
Debug.out( "Bogus Transport Operation" );
throw( new IOException( "Bogus transport!" ));
}
public long
read(
ByteBuffer[] buffers, int array_offset, int length )
throws IOException
{
Debug.out( "Bogus Transport Operation" );
throw( new IOException( "Bogus transport!" ));
}
public void
setTransportMode(
int mode )
{
Debug.out( "Bogus Transport Operation" );
}
public int
getTransportMode()
{
return( transport.getTransportMode());
}
public void
connectOutbound(
ByteBuffer initial_data,
ConnectListener listener )
{
Debug.out( "Bogus Transport Operation" );
listener.connectFailure( new Throwable( "Bogus Transport" ));
}
public void
connectedInbound()
{
Debug.out( "Bogus Transport Operation" );
}
public void
close(
String reason )
{
// we get here after detaching a transport and then closing the peer connection
}
public void
setTrace(
boolean on )
{
}
}
}
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