l2j-server-game/L2_GameServer/java/net/sf/l2j/gameserver/clientpackets/ProtocolVersion.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 net.sf.l2j.gameserver.clientpackets;

import java.util.logging.Logger;

import net.sf.l2j.Config;
import net.sf.l2j.gameserver.serverpackets.KeyPacket;

/**
 * This class ...
 *
 * @version $Revision: 1.5.2.8.2.8 $ $Date: 2005/04/02 10:43:04 $
 */
public final class ProtocolVersion extends L2GameClientPacket
{
	private static final String _C__00_PROTOCOLVERSION = "[C] 00 ProtocolVersion";
	static Logger _log = Logger.getLogger(ProtocolVersion.class.getName());

    private int _version;

	@Override
	protected void readImpl()
	{
		_version  = readD();
	}

	@Override
	protected void runImpl()
	{
		// this packet is never encrypted
		if (_version == -2)
		{
            if (Config.DEBUG) _log.info("Ping received");
			// this is just a ping attempt from the new C2 client
            getClient().closeNow();
		}
        else if (_version < Config.MIN_PROTOCOL_REVISION || _version > Config.MAX_PROTOCOL_REVISION)
        {
            _log.info("Client: "+getClient().toString()+" -> Protocol Revision: " + _version + " is invalid. Minimum is "+Config.MIN_PROTOCOL_REVISION+" and Maximum is "+Config.MAX_PROTOCOL_REVISION+" are supported. Closing connection.");
            _log.warning("Wrong Protocol Version "+_version);
            getClient().closeNow();
        }
        else
        {
        	if (Config.DEBUG)
        	{
        		_log.fine("Client Protocol Revision is ok: "+_version);
        	}

        	KeyPacket pk = new KeyPacket(getClient().enableCrypt());
        	getClient().sendPacket(pk);
        }
	}

	/* (non-Javadoc)
	 * @see net.sf.l2j.gameserver.clientpackets.ClientBasePacket#getType()
	 */
	@Override
	public String getType()
	{
		return _C__00_PROTOCOLVERSION;
	}
}