l2j-server-game/L2J_Server_BETA/java/com/l2jserver/gameserver/network/L2GameClient.java

/*
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
package com.l2jserver.gameserver.network;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.Future;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.locks.ReentrantLock;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

import org.mmocore.network.MMOClient;
import org.mmocore.network.MMOConnection;
import org.mmocore.network.ReceivablePacket;

import com.l2jserver.Config;
import com.l2jserver.L2DatabaseFactory;
import com.l2jserver.gameserver.LoginServerThread;
import com.l2jserver.gameserver.LoginServerThread.SessionKey;
import com.l2jserver.gameserver.ThreadPoolManager;
import com.l2jserver.gameserver.datatables.CharNameTable;
import com.l2jserver.gameserver.datatables.ClanTable;
import com.l2jserver.gameserver.instancemanager.AntiFeedManager;
import com.l2jserver.gameserver.model.CharSelectInfoPackage;
import com.l2jserver.gameserver.model.L2Clan;
import com.l2jserver.gameserver.model.L2World;
import com.l2jserver.gameserver.model.actor.instance.L2PcInstance;
import com.l2jserver.gameserver.model.entity.L2Event;
import com.l2jserver.gameserver.model.entity.TvTEvent;
import com.l2jserver.gameserver.network.serverpackets.ActionFailed;
import com.l2jserver.gameserver.network.serverpackets.L2GameServerPacket;
import com.l2jserver.gameserver.network.serverpackets.ServerClose;
import com.l2jserver.gameserver.security.SecondaryPasswordAuth;
import com.l2jserver.gameserver.util.FloodProtectors;
import com.l2jserver.gameserver.util.Util;

/**
 * Represents a client connected on Game Server
 * @author  KenM
 */
public final class L2GameClient extends MMOClient<MMOConnection<L2GameClient>> implements Runnable
{
	protected static final Logger _log = Logger.getLogger(L2GameClient.class.getName());
	protected static final Logger _logAccounting = Logger.getLogger("accounting");
	
	/**
	 * CONNECTED	- client has just connected
	 * AUTHED		- client has authed but doesnt has character attached to it yet
	 * IN_GAME		- client has selected a char and is in game
	 * @author  KenM
	 */
	public static enum GameClientState { CONNECTED, AUTHED, IN_GAME }
	
	private GameClientState _state;

	// Info
	private final InetAddress _addr;
	private String _accountName;
	private SessionKey _sessionId;
	private L2PcInstance _activeChar;
	private final ReentrantLock _activeCharLock = new ReentrantLock();
	private SecondaryPasswordAuth _secondaryAuth;
	
	private boolean _isAuthedGG;
	private final long _connectionStartTime;
	private CharSelectInfoPackage[] _charSlotMapping = null;
	
	// floodprotectors
	private final FloodProtectors _floodProtectors = new FloodProtectors(this);
	
	// Task
	protected final ScheduledFuture<?> _autoSaveInDB;
	protected ScheduledFuture<?> _cleanupTask = null;
	
	private L2GameServerPacket _aditionalClosePacket;
	
	// Crypt
	private final GameCrypt _crypt;
	
	private final ClientStats _stats;
	
	private boolean _isDetached = false;
	
	private boolean _protocol;
	
	private final ArrayBlockingQueue<ReceivablePacket<L2GameClient>> _packetQueue;
	private final ReentrantLock _queueLock = new ReentrantLock();
	
	private int[][] trace;
	
	public L2GameClient(MMOConnection<L2GameClient> con)
	{
		super(con);
		_state = GameClientState.CONNECTED;
		_connectionStartTime = System.currentTimeMillis();
		_crypt = new GameCrypt();
		_stats = new ClientStats();
		
		_packetQueue = new ArrayBlockingQueue<ReceivablePacket<L2GameClient>>(Config.CLIENT_PACKET_QUEUE_SIZE);
		
		if (Config.CHAR_STORE_INTERVAL > 0)
		{
			_autoSaveInDB = ThreadPoolManager.getInstance().scheduleGeneralAtFixedRate(
					new AutoSaveTask(), 300000L, (Config.CHAR_STORE_INTERVAL*60000L)
			);
		}
		else
		{
			_autoSaveInDB = null;
		}

		try
		{
			_addr = con != null ? con.getInetAddress() : InetAddress.getLocalHost();
		}
		catch (UnknownHostException e)
		{
			throw new Error("Unable to determine localhost address.");
		}
	}
	
	public byte[] enableCrypt()
	{
		byte[] key = BlowFishKeygen.getRandomKey();
		_crypt.setKey(key);
		return key;
	}
	
	public GameClientState getState()
	{
		return _state;
	}
	
	public void setState(GameClientState pState)
	{
		if (_state != pState)
		{
			_state = pState;
			_packetQueue.clear();
		}
	}
	
	public ClientStats getStats()
	{
		return _stats;
	}

	/**
	 * Returns cached connection IP address, for checking detached clients.
	 * For loaded offline traders returns localhost address.
	 */
	public InetAddress getConnectionAddress()
	{
		return _addr;
	}

	public long getConnectionStartTime()
	{
		return _connectionStartTime;
	}
	
	@Override
	public boolean decrypt(ByteBuffer buf, int size)
	{
		_crypt.decrypt(buf.array(), buf.position(), size);
		return true;
	}
	
	@Override
	public boolean encrypt(final ByteBuffer buf, final int size)
	{
		_crypt.encrypt(buf.array(), buf.position(), size);
		buf.position(buf.position() + size);
		return true;
	}
	
	public L2PcInstance getActiveChar()
	{
		return _activeChar;
	}
	
	public void setActiveChar(L2PcInstance pActiveChar)
	{
		_activeChar = pActiveChar;
		//JIV remove - done on spawn
		/*if (_activeChar != null)
		{
			L2World.getInstance().storeObject(getActiveChar());
		}*/
	}
	
	public ReentrantLock getActiveCharLock()
	{
		return _activeCharLock;
	}
	
	public FloodProtectors getFloodProtectors()
	{
		return _floodProtectors;
	}
	
	public void setGameGuardOk(boolean val)
	{
		_isAuthedGG = val;
	}
	
	public boolean isAuthedGG()
	{
		return _isAuthedGG;
	}
	
	public void setAccountName(String pAccountName)
	{
		_accountName = pAccountName;
		
		if (Config.SECOND_AUTH_ENABLED)
			_secondaryAuth = new SecondaryPasswordAuth(this);
	}
	
	public String getAccountName()
	{
		return _accountName;
	}
	
	public void setSessionId(SessionKey sk)
	{
		_sessionId = sk;
	}
	
	public SessionKey getSessionId()
	{
		return _sessionId;
	}
	
	public void sendPacket(L2GameServerPacket gsp)
	{
		if (_isDetached) return;
		
		// Packets from invisible chars sends only to GMs
		if (gsp.isInvisible() && getActiveChar() != null && !getActiveChar().isGM())
			return;
		
		getConnection().sendPacket(gsp);
		gsp.runImpl();
	}
	
	public boolean isDetached()
	{
		return _isDetached;
	}
	
	public void setDetached(boolean b)
	{
		_isDetached = b;
	}
	
	/**
	 * Method to handle character deletion
	 * 
	 * @return a byte:
	 * <li>-1: Error: No char was found for such charslot, caught exception, etc...
	 * <li> 0: character is not member of any clan, proceed with deletion
	 * <li> 1: character is member of a clan, but not clan leader
	 * <li> 2: character is clan leader
	 */
	public byte markToDeleteChar(int charslot)
	{
		int objid = getObjectIdForSlot(charslot);
		
		if (objid < 0)
			return -1;
		
		Connection con = null;
		
		try
		{
			con = L2DatabaseFactory.getInstance().getConnection();
			
			PreparedStatement statement = con.prepareStatement("SELECT clanId FROM characters WHERE charId=?");
			statement.setInt(1, objid);
			ResultSet rs = statement.executeQuery();
			
			rs.next();
			
			int clanId = rs.getInt(1);
			byte answer = 0;
			if (clanId != 0)
			{
				L2Clan clan = ClanTable.getInstance().getClan(clanId);
				
				if (clan == null)
					answer = 0; // jeezes!
				else if (clan.getLeaderId() == objid)
					answer = 2;
				else
					answer = 1;
			}
			
			rs.close();
			statement.close();
			
			// Setting delete time
			if (answer == 0)
			{
				if (Config.DELETE_DAYS == 0)
					deleteCharByObjId(objid);
				else
				{
					statement = con.prepareStatement("UPDATE characters SET deletetime=? WHERE charId=?");
					statement.setLong(1, System.currentTimeMillis() + Config.DELETE_DAYS*86400000L); // 24*60*60*1000 = 86400000
					statement.setInt(2, objid);
					statement.execute();
					statement.close();
				}
				
				LogRecord record = new LogRecord(Level.WARNING, "Delete");
				record.setParameters(new Object[]{objid, L2GameClient.this});
				_logAccounting.log(record);
			}
			
			return answer;
		}
		catch (Exception e)
		{
			_log.log(Level.SEVERE, "Error updating delete time of character.", e);
			return -1;
		}
		finally
		{
			L2DatabaseFactory.close(con);
		}
	}
	
	/**
	 * Save the L2PcInstance to the database.
	 */
	public void saveCharToDisk()
	{
		try
		{
			L2PcInstance player = L2GameClient.this.getActiveChar();
			if (player != null)
			{
				player.store();
				player.storeRecommendations();
				if (Config.UPDATE_ITEMS_ON_CHAR_STORE)
				{
					player.getInventory().updateDatabase();
					player.getWarehouse().updateDatabase();
				}
			}
		}
		catch (Exception e)
		{
			_log.log(Level.SEVERE, "Error saving character..", e);
		}
	}
	
	public void markRestoredChar(int charslot) throws Exception
	{
		//have to make sure active character must be nulled
		/*if (getActiveChar() != null)
		{
			saveCharToDisk (getActiveChar());
			if (Config.DEBUG) _log.fine("active Char saved");
			this.setActiveChar(null);
		}*/
		
		int objid = getObjectIdForSlot(charslot);
		if (objid < 0)
			return;
		Connection con = null;
		try
		{
			con = L2DatabaseFactory.getInstance().getConnection();
			PreparedStatement statement = con.prepareStatement("UPDATE characters SET deletetime=0 WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
		}
		catch (Exception e)
		{
			_log.log(Level.SEVERE, "Error restoring character.", e);
		}
		finally
		{
			L2DatabaseFactory.close(con);
		}
		
		LogRecord record = new LogRecord(Level.WARNING, "Restore");
		record.setParameters(new Object[]{objid, L2GameClient.this});
		_logAccounting.log(record);
	}
	
	public static void deleteCharByObjId(int objid)
	{
		if (objid < 0)
			return;
		
		CharNameTable.getInstance().removeName(objid);
		
		Connection con = null;
		
		try
		{
			con = L2DatabaseFactory.getInstance().getConnection();
			PreparedStatement statement ;
			
			statement = con.prepareStatement("DELETE FROM character_contacts WHERE charId=? OR contactId=?");
			statement.setInt(1, objid);
			statement.setInt(2, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_friends WHERE charId=? OR friendId=?");
			statement.setInt(1, objid);
			statement.setInt(2, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_hennas WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_macroses WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_quests WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_quest_global_data WHERE charId=?");
			statement.setInt(1, objid);
			statement.executeUpdate();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_recipebook WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_shortcuts WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_skills WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_skills_save WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_subclasses WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM heroes WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM olympiad_nobles WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM seven_signs WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM pets WHERE item_obj_id IN (SELECT object_id FROM items WHERE items.owner_id=?)");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM item_attributes WHERE itemId IN (SELECT object_id FROM items WHERE items.owner_id=?)");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM items WHERE owner_id=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM merchant_lease WHERE player_id=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_raid_points WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_reco_bonus WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM character_instance_time WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
			
			statement = con.prepareStatement("DELETE FROM characters WHERE charId=?");
			statement.setInt(1, objid);
			statement.execute();
			statement.close();
		}
		catch (Exception e)
		{
			_log.log(Level.SEVERE, "Error deleting character.", e);
		}
		finally
		{
			L2DatabaseFactory.close(con);
		}
	}
	
	public L2PcInstance loadCharFromDisk(int charslot)
	{
		final int objId = getObjectIdForSlot(charslot);
		if (objId < 0)
			return null;

		L2PcInstance character = L2World.getInstance().getPlayer(objId);
		if (character != null)
		{
			// exploit prevention, should not happens in normal way
			_log.severe("Attempt of double login: " + character.getName()+"("+objId+") "+getAccountName());
			if (character.getClient() != null)
				character.getClient().closeNow();
			else
			{
				character.deleteMe();
			}
			return null;
		}
		
		character = L2PcInstance.load(objId);
		if (character != null)
		{
			
			// preinit some values for each login
			character.setRunning();	// running is default
			character.standUp();		// standing is default
			
			character.refreshOverloaded();
			character.refreshExpertisePenalty();
			character.setOnlineStatus(true, false);
		}
		else
		{
			_log.severe("could not restore in slot: "+ charslot);
		}
		
		//setCharacter(character);
		return character;
	}
	
	/**
	 * @param chars
	 */
	public void setCharSelection(CharSelectInfoPackage[] chars)
	{
		_charSlotMapping = chars;
	}
	
	public CharSelectInfoPackage getCharSelection(int charslot)
	{
		if (_charSlotMapping == null || charslot < 0 || charslot >= _charSlotMapping.length)
			return null;
		return _charSlotMapping[charslot];
	}
	
	public SecondaryPasswordAuth getSecondaryAuth()
	{
		return _secondaryAuth;
	}

	public void close(L2GameServerPacket gsp)
	{
		if (getConnection() == null)
			return; // ofline shop
		if (_aditionalClosePacket != null)
			getConnection().close(new L2GameServerPacket[] {_aditionalClosePacket, gsp});
		else
			getConnection().close(gsp);
	}
	
	public void close(L2GameServerPacket[] gspArray)
	{
		if (getConnection() == null)
			return; // ofline shop
		getConnection().close(gspArray);
	}

	/**
	 * @param charslot
	 * @return
	 */
	private int getObjectIdForSlot(int charslot)
	{
		final CharSelectInfoPackage info = getCharSelection(charslot);
		if (info == null)
		{
			_log.warning(toString()+" tried to delete Character in slot "+charslot+" but no characters exits at that slot.");
			return -1;
		}
		return info.getObjectId();
	}
	
	@Override
	protected void onForcedDisconnection()
	{
		LogRecord record = new LogRecord(Level.WARNING, "Disconnected abnormally");
		record.setParameters(new Object[]{L2GameClient.this});
		_logAccounting.log(record);
	}
	
	@Override
	protected void onDisconnection()
	{
		// no long running tasks here, do it async
		try
		{
			ThreadPoolManager.getInstance().executeTask(new DisconnectTask());
		}
		catch (RejectedExecutionException e)
		{
			// server is closing
		}
	}
	
	/**
	 * Close client connection with {@link ServerClose} packet
	 */
	public void closeNow()
	{
		_isDetached = true; // prevents more packets execution
		close(ServerClose.STATIC_PACKET);
		synchronized (this)
		{
			if (_cleanupTask != null)
				cancelCleanup();
			_cleanupTask = ThreadPoolManager.getInstance().scheduleGeneral(new CleanupTask(), 0); //instant
		}
	}
	
	/**
	 * Produces the best possible string representation of this client.
	 */
	@Override
	public String toString()
	{
		try
		{
			InetAddress address = getConnection().getInetAddress();
			switch (getState())
			{
				case CONNECTED:
					return "[IP: "+(address == null ? "disconnected" : address.getHostAddress())+"]";
				case AUTHED:
					return "[Account: "+getAccountName()+" - IP: "+(address == null ? "disconnected" : address.getHostAddress())+"]";
				case IN_GAME:
					return "[Character: "+(getActiveChar() == null ? "disconnected" : getActiveChar().getName()+"["+getActiveChar().getObjectId()+"]")+" - Account: "+getAccountName()+" - IP: "+(address == null ? "disconnected" : address.getHostAddress())+"]";
				default:
					throw new IllegalStateException("Missing state on switch");
			}
		}
		catch (NullPointerException e)
		{
			return "[Character read failed due to disconnect]";
		}
	}
	
	class DisconnectTask implements Runnable
	{
		
		/**
		 * @see java.lang.Runnable#run()
		 */
		@Override
		public void run()
		{
			boolean fast = true;
			
			try
			{
				final L2PcInstance player = L2GameClient.this.getActiveChar();
				if (player != null && !isDetached())
				{
					setDetached(true);
					if (!player.isInOlympiadMode()
							&& !player.isFestivalParticipant()
							&& !TvTEvent.isPlayerParticipant(player.getObjectId())
							&& !player.isInJail()
							&& player.getVehicle() == null)
					{
						if ((player.isInStoreMode() && Config.OFFLINE_TRADE_ENABLE)
								|| (player.isInCraftMode() && Config.OFFLINE_CRAFT_ENABLE))
						{
							player.leaveParty();
							
							// If the L2PcInstance has Pet, unsummon it
							if (player.getPet() != null)
							{
								player.getPet().setRestoreSummon(true);
								
								player.getPet().unSummon(player);
								// dead pet wasnt unsummoned, broadcast npcinfo changes (pet will be without owner name - means owner offline)
								if (player.getPet() != null)
									player.getPet().broadcastNpcInfo(0);
							}
							
							if (Config.OFFLINE_SET_NAME_COLOR)
							{
								player.getAppearance().setNameColor(Config.OFFLINE_NAME_COLOR);
								player.broadcastUserInfo();
							}
							if (player.getOfflineStartTime() == 0)
								player.setOfflineStartTime(System.currentTimeMillis());
							
							LogRecord record = new LogRecord(Level.INFO, "Entering offline mode");
							record.setParameters(new Object[]{L2GameClient.this});
							_logAccounting.log(record);
							return;
						}
					}
					if (player.isInCombat() || player.isLocked())
					{
						fast = false;
					}
				}
				cleanMe(fast);
			}
			catch (Exception e1)
			{
				_log.log(Level.WARNING, "Error while disconnecting client.", e1);
			}
		}
	}
	
	public void cleanMe(boolean fast)
	{
		try
		{
			synchronized(this)
			{
				if (_cleanupTask == null)
				{
					_cleanupTask = ThreadPoolManager.getInstance().scheduleGeneral(new CleanupTask(), fast ? 5 : 15000L);
				}
			}
		}
		catch (Exception e1)
		{
			_log.log(Level.WARNING, "Error during cleanup.", e1);
		}
	}
	
	class CleanupTask implements Runnable
	{
		/**
		 * @see java.lang.Runnable#run()
		 */
		@Override
		public void run()
		{
			try
			{
				// we are going to manually save the char bellow thus we can force the cancel
				if (_autoSaveInDB != null)
				{
					_autoSaveInDB.cancel(true);
					//ThreadPoolManager.getInstance().removeGeneral((Runnable) _autoSaveInDB);
				}
				
				L2PcInstance player = L2GameClient.this.getActiveChar();
				if (player != null) // this should only happen on connection loss
				{
					if (player.isLocked())
					{
						_log.log(Level.WARNING, "Player "+player.getName()+" still performing subclass actions during disconnect.");
					}
					
					// we store all data from players who are disconnected while in an event in order to restore it in the next login
					if (L2Event.isParticipant(player))
					{
						L2Event.savePlayerEventStatus(player);
					}

					// prevent closing again
					player.setClient(null);
					
					if (player.isOnline())
					{
						player.deleteMe();
						AntiFeedManager.getInstance().onDisconnect(L2GameClient.this);
					}
				}
				L2GameClient.this.setActiveChar(null);
			}
			catch (Exception e1)
			{
				_log.log(Level.WARNING, "Error while cleanup client.", e1);
			}
			finally
			{
				LoginServerThread.getInstance().sendLogout(L2GameClient.this.getAccountName());
			}
		}
	}
	
	class AutoSaveTask implements Runnable
	{
		@Override
		public void run()
		{
			try
			{
				L2PcInstance player = L2GameClient.this.getActiveChar();
				if (player != null && player.isOnline()) // safety precaution
				{
					saveCharToDisk();
					if (player.getPet() != null)
						player.getPet().store();
				}
			}
			catch (Exception e)
			{
				_log.log(Level.SEVERE, "Error on AutoSaveTask.", e);
			}
		}
	}
	
	public boolean isProtocolOk()
	{
		return _protocol;
	}
	public void setProtocolOk(boolean b)
	{
		_protocol = b;
	}
	
	public boolean handleCheat(String punishment)
	{
		if (_activeChar != null)
		{
			Util.handleIllegalPlayerAction(_activeChar, toString()+": "+punishment, Config.DEFAULT_PUNISH);
			return true;
		}
		
		Logger _logAudit = Logger.getLogger("audit");
		_logAudit.log(Level.INFO, "AUDIT: Client "+toString()+" kicked for reason: "+punishment);
		closeNow();
		return false;
	}
	
	/**
	 * Returns false if client can receive packets.
	 * True if detached, or flood detected, or queue overflow detected and queue still not empty.
	 */
	public boolean dropPacket()
	{
		if (_isDetached) // detached clients can't receive any packets
			return true;
		
		// flood protection
		if (getStats().countPacket(_packetQueue.size()))
		{
			sendPacket(ActionFailed.STATIC_PACKET);
			return true;
		}
		
		return getStats().dropPacket();
	}
	
	/**
	 * Counts buffer underflow exceptions.
	 */
	public void onBufferUnderflow()
	{
		if (getStats().countUnderflowException())
		{
			_log.severe("Client " + toString() + " - Disconnected: Too many buffer underflow exceptions.");
			closeNow();
			return;
		}
		if (_state == GameClientState.CONNECTED) // in CONNECTED state kick client immediately
		{
			if (Config.PACKET_HANDLER_DEBUG)
				_log.severe("Client " + toString() + " - Disconnected, too many buffer underflows in non-authed state.");
			closeNow();
		}
	}
	
	/**
	 * Counts unknown packets
	 */
	public void onUnknownPacket()
	{
		if (getStats().countUnknownPacket())
		{
			_log.severe("Client " + toString() + " - Disconnected: Too many unknown packets.");
			closeNow();
			return;
		}
		if (_state == GameClientState.CONNECTED) // in CONNECTED state kick client immediately
		{
			if (Config.PACKET_HANDLER_DEBUG)
				_log.severe("Client " + toString() + " - Disconnected, too many unknown packets in non-authed state.");
			closeNow();
		}
	}
	
	/**
	 * Add packet to the queue and start worker thread if needed
	 */
	public void execute(ReceivablePacket<L2GameClient> packet)
	{
		if (getStats().countFloods())
		{
			_log.severe("Client " + toString() + " - Disconnected, too many floods:"+getStats().longFloods+" long and "+getStats().shortFloods+" short.");
			closeNow();
			return;
		}
		
		if (!_packetQueue.offer(packet))
		{
			if (getStats().countQueueOverflow())
			{
				_log.severe("Client " + toString() + " - Disconnected, too many queue overflows.");
				closeNow();
			}
			else
				sendPacket(ActionFailed.STATIC_PACKET);
			
			return;
		}
		
		if (_queueLock.isLocked()) // already processing
			return;
		
		try
		{
			if (_state == GameClientState.CONNECTED)
			{
				if (getStats().processedPackets > 3)
				{
					if (Config.PACKET_HANDLER_DEBUG)
						_log.severe("Client " + toString() + " - Disconnected, too many packets in non-authed state.");
					closeNow();
					return;
				}
				
				ThreadPoolManager.getInstance().executeIOPacket(this);
			}
			else
				ThreadPoolManager.getInstance().executePacket(this);
		}
		catch (RejectedExecutionException e)
		{
			// if the server is shutdown we ignore
			if (!ThreadPoolManager.getInstance().isShutdown())
			{
				_log.severe("Failed executing: "+packet.getClass().getSimpleName()+" for Client: "+toString());
			}
		}
	}
	
	@Override
	public void run()
	{
		if (!_queueLock.tryLock())
			return;
		
		try
		{
			int count = 0;
			while (true)
			{
				final ReceivablePacket<L2GameClient> packet = _packetQueue.poll();
				if (packet == null) // queue is empty
					return;
				
				if (_isDetached) // clear queue immediately after detach
				{
					_packetQueue.clear();
					return;
				}
				
				try
				{
					packet.run();
				}
				catch (Exception e)
				{
					_log.severe("Exception during execution "+packet.getClass().getSimpleName()+", client: "+toString()+","+e.getMessage());
				}
				
				count++;
				if (getStats().countBurst(count))
					return;
			}
		}
		finally
		{
			_queueLock.unlock();
		}
	}
	
	public void setClientTracert(int[][] tracert)
	{
		trace = tracert;
	}
	
	public int[][] getTrace()
	{
		return trace;
	}
	
	private boolean cancelCleanup()
	{
		Future<?> task = _cleanupTask;
		if (task != null)
		{
			_cleanupTask = null;
			return task.cancel(true);
		}
		return false;
	}
	
	public void setAditionalClosePacket(L2GameServerPacket _aditionalClosePacket)
	{
		this._aditionalClosePacket = _aditionalClosePacket;
	}
}