[Share]Funny flood fix!?

`Peter · February 13, 2010

Oh come on you are not serious. Are you gonna floodprotect the movebackwardtolocation? Players use it ALL the -beep-ing time.

Floodprotecting it is the most stupid thing i've ever heard.. Imo should be locked.

You are wrong..., Post a different fix.

@Addy, actually this seems like LAG :), so i wouldn't reccomend it. Nevertheless, you can add a different fix ( to block this packets, I am working on it ) :D

GoodT · February 14, 2010

New working code ;)... Thx xAddytzu for idea...

Index: /trunk/L2J/java/net/sf/l2j/gameserver/network/clientpackets/MoveBackwardToLocation.java
===================================================================
--- /trunk/L2J/java/net/sf/l2j/gameserver/network/clientpackets/MoveBackwardToLocation.java (revision 9)
+++ /trunk/L2J/java/net/sf/l2j/gameserver/network/clientpackets/MoveBackwardToLocation.java (revision 52)
@@ -25,4 +25,5 @@
import net.sf.l2j.gameserver.ai.CtrlIntention;
import net.sf.l2j.gameserver.model.L2CharPosition;
+import net.sf.l2j.gameserver.model.L2Object;
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.gameserver.network.SystemMessageId;
@@ -31,4 +32,5 @@
import net.sf.l2j.gameserver.network.serverpackets.SystemMessage;
import net.sf.l2j.gameserver.templates.L2WeaponType;
+import net.sf.l2j.gameserver.util.FloodProtector;
import net.sf.l2j.gameserver.util.IllegalPlayerAction;
import net.sf.l2j.gameserver.util.Util;
@@ -100,4 +102,8 @@
		if (activeChar == null)
			return;
+		
+		L2Object player = null;
+		if (!FloodProtector.getInstance().tryPerformAction(player.getObjectId(), FloodProtector.PROTECTED_PACKETS))
+			return;

		_curX = activeChar.getX();
Index: /trunk/L2J/java/net/sf/l2j/gameserver/util/FloodProtector.java
===================================================================
--- /trunk/L2J/java/net/sf/l2j/gameserver/util/FloodProtector.java (revision 31)
+++ /trunk/L2J/java/net/sf/l2j/gameserver/util/FloodProtector.java (revision 52)
@@ -34,4 +34,5 @@
	private static final Logger _log = Logger.getLogger(FloodProtector.class.getName());
	private static FloodProtector _instance;
+

	public static final FloodProtector getInstance()
@@ -76,6 +77,7 @@
	public static final int PROTECTED_GIVEITEMTOPET = 13;
	public static final int PROTECTED_BANKING_SYSTEM = 14;	
+	public static final int PROTECTED_PACKETS = 15;
public static final int PROTECTED_UNKNOWNPACKET = 16;
public static final int PROTECTED_BYPASS        = 17;

	// =========================================================

Belzebul · February 14, 2010

New working code ;)... Thx xAddytzu for idea...

Index: /trunk/L2J/java/net/sf/l2j/gameserver/network/clientpackets/MoveBackwardToLocation.java
===================================================================
--- /trunk/L2J/java/net/sf/l2j/gameserver/network/clientpackets/MoveBackwardToLocation.java (revision 9)
+++ /trunk/L2J/java/net/sf/l2j/gameserver/network/clientpackets/MoveBackwardToLocation.java (revision 52)
@@ -25,4 +25,5 @@
import net.sf.l2j.gameserver.ai.CtrlIntention;
import net.sf.l2j.gameserver.model.L2CharPosition;
+import net.sf.l2j.gameserver.model.L2Object;
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.gameserver.network.SystemMessageId;
@@ -31,4 +32,5 @@
import net.sf.l2j.gameserver.network.serverpackets.SystemMessage;
import net.sf.l2j.gameserver.templates.L2WeaponType;
+import net.sf.l2j.gameserver.util.FloodProtector;
import net.sf.l2j.gameserver.util.IllegalPlayerAction;
import net.sf.l2j.gameserver.util.Util;
@@ -100,4 +102,8 @@
		if (activeChar == null)
			return;
+		
+		L2Object player = null;
+		if (!FloodProtector.getInstance().tryPerformAction(player.getObjectId(), FloodProtector.PROTECTED_PACKETS))
+			return;

		_curX = activeChar.getX();
Index: /trunk/L2J/java/net/sf/l2j/gameserver/util/FloodProtector.java
===================================================================
--- /trunk/L2J/java/net/sf/l2j/gameserver/util/FloodProtector.java (revision 31)
+++ /trunk/L2J/java/net/sf/l2j/gameserver/util/FloodProtector.java (revision 52)
@@ -34,4 +34,5 @@
	private static final Logger _log = Logger.getLogger(FloodProtector.class.getName());
	private static FloodProtector _instance;
+

	public static final FloodProtector getInstance()
@@ -76,6 +77,7 @@
	public static final int PROTECTED_GIVEITEMTOPET = 13;
	public static final int PROTECTED_BANKING_SYSTEM = 14;	
+	public static final int PROTECTED_PACKETS = 15;
public static final int PROTECTED_UNKNOWNPACKET = 16;
public static final int PROTECTED_BYPASS        = 17;

	// =========================================================

this will really work?

Coyote™ · February 14, 2010

New working code ;)... Thx xAddytzu for idea...

Index: /trunk/L2J/java/net/sf/l2j/gameserver/network/clientpackets/MoveBackwardToLocation.java
===================================================================
--- /trunk/L2J/java/net/sf/l2j/gameserver/network/clientpackets/MoveBackwardToLocation.java (revision 9)
+++ /trunk/L2J/java/net/sf/l2j/gameserver/network/clientpackets/MoveBackwardToLocation.java (revision 52)
@@ -25,4 +25,5 @@
import net.sf.l2j.gameserver.ai.CtrlIntention;
import net.sf.l2j.gameserver.model.L2CharPosition;
+import net.sf.l2j.gameserver.model.L2Object;
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.gameserver.network.SystemMessageId;
@@ -31,4 +32,5 @@
import net.sf.l2j.gameserver.network.serverpackets.SystemMessage;
import net.sf.l2j.gameserver.templates.L2WeaponType;
+import net.sf.l2j.gameserver.util.FloodProtector;
import net.sf.l2j.gameserver.util.IllegalPlayerAction;
import net.sf.l2j.gameserver.util.Util;
@@ -100,4 +102,8 @@
		if (activeChar == null)
			return;
+		
+		L2Object player = null;
+		if (!FloodProtector.getInstance().tryPerformAction(player.getObjectId(), FloodProtector.PROTECTED_PACKETS))
+			return;

		_curX = activeChar.getX();
Index: /trunk/L2J/java/net/sf/l2j/gameserver/util/FloodProtector.java
===================================================================
--- /trunk/L2J/java/net/sf/l2j/gameserver/util/FloodProtector.java (revision 31)
+++ /trunk/L2J/java/net/sf/l2j/gameserver/util/FloodProtector.java (revision 52)
@@ -34,4 +34,5 @@
	private static final Logger _log = Logger.getLogger(FloodProtector.class.getName());
	private static FloodProtector _instance;
+

	public static final FloodProtector getInstance()
@@ -76,6 +77,7 @@
	public static final int PROTECTED_GIVEITEMTOPET = 13;
	public static final int PROTECTED_BANKING_SYSTEM = 14;	
+	public static final int PROTECTED_PACKETS = 15;
public static final int PROTECTED_UNKNOWNPACKET = 16;
public static final int PROTECTED_BYPASS        = 17;

	// =========================================================

Still

Oh come on you are not serious. Are you gonna floodprotect the movebackwardtolocation? Players use it ALL the -beep-ing time.

Floodprotecting it is the most stupid thing i've ever heard.. Imo should be locked.

Belzebul · February 14, 2010

so, this fix may be useful with a config. When a cheater is trying to hack you with funny flood, you enable the protection, even it produces lag to players.

xAddytzu · February 14, 2010

no, you can do new floodprotector for block consecutive packets.. it's a simple way

GoKu · February 15, 2010

creates a bit of lag, but thanks for share

Setekh · February 15, 2010

http://www.maxcheaters.com/forum/index.php?topic=124395.0;msg=872797

Damn dude this topic is useless... Sorry addy but this is quite a braind dead thing to do... damn....

Belzebul · February 15, 2010

so, does somebody knows how to fix that? if does, please share it with us ;)

thank you.

GoodT · February 19, 2010

I have one idea, but not tested, just written...

Index: C:/Workspace/L2_GameServer_It/java/config/server.properties
===================================================================
--- C:/Workspace/L2_GameServer_It/java/config/server.properties	(revision 1025)
+++ C:/Workspace/L2_GameServer_It/java/config/server.properties	(working copy)
@@ -69,6 +69,16 @@
# Define how many players are allowed to play simultaneously on your server.
MaximumOnlineUsers=100

+# Activate Protection for knownPacket flooding
+MaxPacketProtection = False
+# How much known packets before punishment.
+# If the player send more than 100 knownPackets per second, the player get punished.
+KnownPacketsBeforeBan = 100
+# Punishments
+# 1 - broadcast warning to gms only
+# 2 - kick player (default)
+# 3 - kick & ban player (Accesslevel -99)
+KnownPacketsPunishment = 2

# Minimum and maximum protocol revision that server allow to connect.
# You must keep MinProtocolRevision <= MaxProtocolRevision.
Index: C:/Workspace/L2_GameServer_It/java/net/sf/l2j/Config.java
===================================================================
--- C:/Workspace/L2_GameServer_It/java/net/sf/l2j/Config.java	(revision 1025)
+++ C:/Workspace/L2_GameServer_It/java/net/sf/l2j/Config.java	(working copy)
@@ -78,6 +78,10 @@
     /** Maximum number of players allowed to play simultaneously on server */
     public static int   MAXIMUM_ONLINE_USERS;
     
+    public static boolean ENABLE_MAX_PACKET_PROTECTION;
+    public static int MAX_KNOWN_PACKETS;
+    public static int KNOWN_PACKETS_PUNiSHMENT;
+    
     // Setting for serverList
     /** Displays [] in front of server name ? */
     public static boolean SERVER_LIST_BRACKET;
@@ -1120,6 +1124,10 @@

                 MAX_CHARACTERS_NUMBER_PER_ACCOUNT = Integer.parseInt(serverSettings.getProperty("CharMaxNumber", "0"));
                 MAXIMUM_ONLINE_USERS        = Integer.parseInt(serverSettings.getProperty("MaximumOnlineUsers", "100"));
+                
+                ENABLE_MAX_PACKET_PROTECTION = Boolean.parseBoolean(serverSettings.getProperty("MaxPacketProtection", "false"));
+                MAX_KNOWN_PACKETS = Integer.parseInt(serverSettings.getProperty("KnownPacketsBeforeBan", "5"));
+                KNOWN_PACKETS_PUNiSHMENT = Integer.parseInt(serverSettings.getProperty("KnownPacketsPunishment", "2"));
                
                 MIN_PROTOCOL_REVISION   = Integer.parseInt(serverSettings.getProperty("MinProtocolRevision", "660"));
                 MAX_PROTOCOL_REVISION   = Integer.parseInt(serverSettings.getProperty("MaxProtocolRevision", "665"));
@@ -2082,6 +2090,10 @@
         else if (pName.equalsIgnoreCase("AutoDeleteInvalidQuestData")) AUTODELETE_INVALID_QUEST_DATA = Boolean.valueOf(pValue);

         else if (pName.equalsIgnoreCase("MaximumOnlineUsers")) MAXIMUM_ONLINE_USERS = Integer.parseInt(pValue);
+        
+        else if (pName.equalsIgnoreCase("MaxPacketProtection")) ENABLE_MAX_PACKET_PROTECTION = Boolean.parseBoolean(pValue);
+        else if (pName.equalsIgnoreCase("KnownPacketsBeforeBan")) MAX_KNOWN_PACKETS = Integer.parseInt(pValue);
+        else if (pName.equalsIgnoreCase("KnownPacketsPunishment")) KNOWN_PACKETS_PUNiSHMENT = Integer.parseInt(pValue);

         else if (pName.equalsIgnoreCase("ZoneTown")) ZONE_TOWN = Integer.parseInt(pValue);

Index: C:/Workspace/L2_GameServer_It/java/net/sf/l2j/gameserver/network/L2GameClient.java
===================================================================
--- C:/Workspace/L2_GameServer_It/java/net/sf/l2j/gameserver/network/L2GameClient.java	(revision 1025)
+++ C:/Workspace/L2_GameServer_It/java/net/sf/l2j/gameserver/network/L2GameClient.java	(working copy)
@@ -41,6 +41,7 @@
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.gameserver.model.entity.L2Event;
import net.sf.l2j.gameserver.serverpackets.L2GameServerPacket;
+import net.sf.l2j.gameserver.util.FloodProtector;
import net.sf.l2j.util.EventData;

import com.l2jserver.mmocore.network.MMOClient;
@@ -84,6 +85,9 @@
	// Flood protection
	public byte packetsSentInSec = 0;
	public int packetsSentStartTick = 0;
+	 
+    // KnownPacket protection
+    private int knownPacketCount = 100;

	public L2GameClient(MMOConnection<L2GameClient> con)
	{
@@ -489,6 +493,26 @@
     	}
     }
     
+    public boolean checkknownPackets()
+	{
+		if(this.getActiveChar() != null && 
+				!FloodProtector.getInstance().tryPerformAction(this.getActiveChar().getObjectId(), FloodProtector.PROTECTED_KNOWNPACKET))
+		{
+			knownPacketCount++;
+			if (knownPacketCount >= Config.MAX_KNOWN_PACKETS)
+			{
+				return true;
+			}
+			else
+				return false;
+		}
+		else
+		{
+			knownPacketCount = 0;
+			return false;
+		}
+	}
+    
     /**
      * Produces the best possible string representation of this client.
      */
Index: C:/Workspace/L2_GameServer_It/java/net/sf/l2j/gameserver/network/L2GamePacketHandler.java
===================================================================
--- C:/Workspace/L2_GameServer_It/java/net/sf/l2j/gameserver/network/L2GamePacketHandler.java	(revision 1025)
+++ C:/Workspace/L2_GameServer_It/java/net/sf/l2j/gameserver/network/L2GamePacketHandler.java	(working copy)
@@ -18,10 +18,13 @@
package net.sf.l2j.gameserver.network;

import java.nio.ByteBuffer;
+import java.sql.Time;
import java.util.concurrent.RejectedExecutionException;
import java.util.logging.Logger;

import net.sf.l2j.Config;
+import net.sf.l2j.gameserver.GmListTable;
+import net.sf.l2j.gameserver.LoginServerThread;
import net.sf.l2j.gameserver.ThreadPoolManager;
import net.sf.l2j.gameserver.clientpackets.*;
import net.sf.l2j.gameserver.network.L2GameClient.GameClientState;
@@ -811,6 +814,8 @@
      	byte[] array = new byte[size];
      	buf.get(array);
      	_log.warning(Util.printData(array, size));
+     	if (Config.ENABLE_MAX_PACKET_PROTECTION)
+     		knownPacketProtection(client);
	}

	private void printDebugDoubleOpcode(int opcode, int id2, ByteBuffer buf, GameClientState state, L2GameClient client)
@@ -820,7 +825,50 @@
      	byte[] array = new byte[size]; 
      	buf.get(array);
      	_log.warning(Util.printData(array, size));
+     	if (Config.ENABLE_MAX_PACKET_PROTECTION)
+     		knownPacketProtection(client);
	}
+	
+	private void knownPacketProtection(L2GameClient client)
+	{
+		if(client.getActiveChar() != null && client.checkknownPackets())
+		{
+			punish(client);
+			return;
+		}
+	}
+	
+	private void punish(L2GameClient client)
+	{
+		switch(Config.KNOWN_PACKETS_PUNiSHMENT)
+		{
+			case(1):
+				if (client.getActiveChar() != null)
+				{
+					GmListTable.broadcastMessageToGMs("Player " + client.getActiveChar().toString() + " flooding known packets.");
+				}
+				break;
+			case(2):
+				_log.warning("PacketProtection: " + client.toString() + " got kicked due flooding of known packets");
+				if (client.getActiveChar() != null) 
+				{
+					GmListTable.broadcastMessageToGMs("Player " + client.getActiveChar().toString() + " flooding known packets and got kicked.");
+					client.getActiveChar().sendMessage("You are will be kicked for known packet flooding, GM informed.");
+					client.getActiveChar().closeNetConnection();
+				}
+				break;
+			case(3):
+				_log.warning("PacketProtection: " + client.toString() + " got banned due flooding of known packets");
+				LoginServerThread.getInstance().sendAccessLevel(client.getAccountName(), -99);
+				if(client.getActiveChar() != null)
+				{
+					GmListTable.broadcastMessageToGMs("Player " + client.getActiveChar().toString() + " flooding known packets and got banned.");
+					client.getActiveChar().sendMessage("You are banned for known packet flooding, GM informed.");
+					client.getActiveChar().closeNetConnection();
+				}
+				break;
+		}
+	}

	// impl
	public L2GameClient create(MMOConnection<L2GameClient> con)
Index: C:/Workspace/L2_GameServer_It/java/net/sf/l2j/gameserver/util/FloodProtector.java
===================================================================
--- C:/Workspace/L2_GameServer_It/java/net/sf/l2j/gameserver/util/FloodProtector.java	(revision 1025)
+++ C:/Workspace/L2_GameServer_It/java/net/sf/l2j/gameserver/util/FloodProtector.java	(working copy)
@@ -50,15 +50,16 @@

	// =========================================================
	// Enum
-	private static final int PROTECTEDACTIONSIZE = 3;
+	private static final int PROTECTEDACTIONSIZE = 4;

	// reuse delays for protected actions (in game ticks 1 tick = 100ms)
-	private static final int[] REUSEDELAY = new int[]{ 4, 42, 42 };
+	private static final int[] REUSEDELAY = new int[]{ 4, 42, 42, 15 };

	// protected actions
	public static final int PROTECTED_USEITEM	= 0;
	public static final int PROTECTED_ROLLDICE	= 1;
	public static final int PROTECTED_FIREWORK	= 2;
+	public static final int PROTECTED_KNOWNPACKET = 100;

	// =========================================================
	// Constructor

down · February 19, 2010

Thank u for this mate! rly great job!

L33N · February 22, 2010

i will try it ! tnx

Setekh · February 22, 2010

Access filter, heard about it?

Known packet protection.. lol that sounds...well.... STUPID!

DominiQue · February 22, 2010

Known packet protection.. lol that sounds...well.... STUPID!

here must agree with u :)

GoodT · February 22, 2010

:D, players send to server max. +/- 100 packets for second, when they send more - they want lag server!!!

And name of protection? Its really irrelevant.

Important its, that works ;).

Keep smile guys :P.

[Share]Funny flood fix!?

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