/*
* Created on 22 Jun 2006
* Created by Paul Gardner
* Copyright (C) 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.udp;
import java.util.*;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.InetSocketAddress;
import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.config.ParameterListener;
import org.gudy.azureus2.core3.logging.LogEvent;
import org.gudy.azureus2.core3.logging.LogIDs;
import org.gudy.azureus2.core3.logging.Logger;
import org.gudy.azureus2.core3.util.AESemaphore;
import org.gudy.azureus2.core3.util.AEThread;
import org.gudy.azureus2.core3.util.Debug;
import com.aelitis.azureus.core.util.AEPriorityMixin;
import com.aelitis.net.udp.uc.PRUDPPacketHandler;
import com.aelitis.net.udp.uc.PRUDPPacketHandlerFactory;
import com.aelitis.net.udp.uc.PRUDPPrimordialHandler;
public class
NetworkGlueUDP
implements NetworkGlue, PRUDPPrimordialHandler, AEPriorityMixin
{
private static final LogIDs LOGID = LogIDs.NET;
private NetworkGlueListener listener;
private PRUDPPacketHandler handler;
private LinkedList msg_queue = new LinkedList();
private AESemaphore msg_queue_sem = new AESemaphore( "NetworkGlueUDP" );
private AESemaphore msg_queue_slot_sem = new AESemaphore( "NetworkGlueUDP", 128 );
private long total_packets_received;
private long total_bytes_received;
private long total_packets_sent;
private long total_bytes_sent;
protected
NetworkGlueUDP(
NetworkGlueListener _listener )
{
listener = _listener;
COConfigurationManager.addAndFireParameterListeners(
new String[]{ "UDP.Listen.Port", "UDP.Listen.Port.Enable" },
new ParameterListener()
{
public void
parameterChanged(
String name )
{
boolean enabled = COConfigurationManager.getBooleanParameter( "UDP.Listen.Port.Enable" );
if ( enabled ){
int port = COConfigurationManager.getIntParameter( "UDP.Listen.Port" );
if ( handler == null || port != handler.getPort()){
if ( handler != null ){
Logger.log(new LogEvent(LOGID, "Deactivating UDP listener on port " + handler.getPort()));
handler.removePrimordialHandler( NetworkGlueUDP.this );
}
Logger.log(new LogEvent(LOGID, "Activating UDP listener on port " + port ));
handler = PRUDPPacketHandlerFactory.getHandler( port );
handler.addPrimordialHandler( NetworkGlueUDP.this );
}
}else{
if ( handler != null ){
Logger.log(new LogEvent(LOGID, "Deactivating UDP listener on port " + handler.getPort()));
handler.removePrimordialHandler( NetworkGlueUDP.this );
}
}
}
});
new AEThread( "NetworkGlueUDP", true )
{
public void
runSupport()
{
while( true ){
InetSocketAddress target_address = null;
byte[] data = null;
msg_queue_sem.reserve();
synchronized( msg_queue ){
Object[] entry = (Object[])msg_queue.removeFirst();
target_address = (InetSocketAddress)entry[0];
data = (byte[])entry[1];
}
msg_queue_slot_sem.release();
total_packets_sent++;
total_bytes_sent += data.length;
try{
handler.primordialSend( data, target_address );
}catch( Throwable e ){
Logger.log(new LogEvent( LOGID, "Primordial UDP send failed: " + Debug.getNestedExceptionMessage(e)));
}finally{
try{
Thread.sleep(3);
}catch( Throwable e ){
}
}
}
}
}.start();
}
public int
getPriority()
{
return( AEPriorityMixin.PRIORITY_LOW );
}
public boolean
packetReceived(
DatagramPacket packet )
{
if ( packet.getLength() >= 12 ){
byte[] data = packet.getData();
// first and third word must have something set in mask: 0xfffff800
if ( ( ( data[0] & 0xff ) != 0 ||
( data[1] & 0xff ) != 0 ||
( data[2] & 0xf8 ) != 0 ) &&
( ( data[8] & 0xff ) != 0 ||
( data[9] & 0xff ) != 0 ||
( data[10]& 0xf8 ) != 0 )){
total_packets_received++;
total_bytes_received += packet.getLength();
listener.receive( handler.getPort(), new InetSocketAddress( packet.getAddress(), packet.getPort()), packet.getData(), packet.getLength());
// consume this packet
return( true );
}
}
// don't consume it, allow it to be passed on for further processing
return( false );
}
public int
send(
int local_port,
InetSocketAddress target,
byte[] data )
throws IOException
{
msg_queue_slot_sem.reserve();
synchronized( msg_queue ){
msg_queue.add( new Object[]{ target, data });
}
msg_queue_sem.release();
return( data.length );
}
public long[]
getStats()
{
return( new long[]{ total_packets_sent, total_bytes_sent, total_packets_received, total_bytes_received });
}
}