Experimental "nuke" protection

plugin.yml

@@ -3,7 +3,7 @@ name: NoCheat
 author: Evenprime
 
 main: cc.co.evenprime.bukkit.nocheat.NoCheat
-version: 1.07c
+version: 1.08
 
 softdepend: [ Permissions, CraftIRC ]
 

src/cc/co/evenprime/bukkit/nocheat/NoCheat.java

@@ -19,6 +19,7 @@ import cc.co.evenprime.bukkit.nocheat.actions.CustomAction;
 import cc.co.evenprime.bukkit.nocheat.checks.AirbuildCheck;
 import cc.co.evenprime.bukkit.nocheat.checks.BogusitemsCheck;
 import cc.co.evenprime.bukkit.nocheat.checks.Check;
+import cc.co.evenprime.bukkit.nocheat.checks.NukeCheck;
 import cc.co.evenprime.bukkit.nocheat.checks.MovingCheck;
 import cc.co.evenprime.bukkit.nocheat.checks.SpeedhackCheck;
 import cc.co.evenprime.bukkit.nocheat.config.NoCheatConfiguration;
@@ -68,6 +69,7 @@ public class NoCheat extends JavaPlugin implements CommandSender {
 	private Level ircLevel;
 	private Level consoleLevel;
 	private String ircTag;
+	private NukeCheck instantmineCheck;
 
 
 	public NoCheat() { 	
@@ -137,9 +139,10 @@ public class NoCheat extends JavaPlugin implements CommandSender {
 		speedhackCheck = new SpeedhackCheck(this, config);
 		airbuildCheck = new AirbuildCheck(this, config);
 		bogusitemsCheck = new BogusitemsCheck(this, config);
+		instantmineCheck = new NukeCheck(this, config);
 		
 		// just for convenience
-		checks = new Check[] { movingCheck, speedhackCheck, airbuildCheck, bogusitemsCheck };
+		checks = new Check[] { movingCheck, speedhackCheck, airbuildCheck, bogusitemsCheck, instantmineCheck };
 
 		if(!allowFlightSet && movingCheck.isActive()) {
 			Logger.getLogger("Minecraft").warning( "[NoCheat] you have set \"allow-flight=false\" in your server.properties file. That builtin anti-flying-mechanism will likely conflict with this plugin. Please consider deactivating it by setting it to \"true\"");

src/cc/co/evenprime/bukkit/nocheat/NoCheatData.java

@@ -8,6 +8,7 @@ import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 
 import cc.co.evenprime.bukkit.nocheat.data.AirbuildData;
+import cc.co.evenprime.bukkit.nocheat.data.NukeData;
 import cc.co.evenprime.bukkit.nocheat.data.MovingData;
 import cc.co.evenprime.bukkit.nocheat.data.PermissionData;
 import cc.co.evenprime.bukkit.nocheat.data.SpeedhackData;
@@ -28,6 +29,7 @@ public class NoCheatData {
 	public AirbuildData airbuild;
 
 	public PermissionData permission;
+	public NukeData nuke;
 
 
 

src/cc/co/evenprime/bukkit/nocheat/checks/NukeCheck.java

@@ -0,0 +1,119 @@
+package cc.co.evenprime.bukkit.nocheat.checks;
+
+import java.util.Locale;
+import java.util.logging.Level;
+
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.block.Block;
+import org.bukkit.event.Event;
+import org.bukkit.event.Listener;
+import org.bukkit.event.Event.Priority;
+import org.bukkit.event.block.BlockBreakEvent;
+import org.bukkit.event.block.BlockDamageEvent;
+import org.bukkit.plugin.PluginManager;
+import org.bukkit.util.Vector;
+
+import cc.co.evenprime.bukkit.nocheat.ConfigurationException;
+import cc.co.evenprime.bukkit.nocheat.NoCheat;
+import cc.co.evenprime.bukkit.nocheat.config.NoCheatConfiguration;
+import cc.co.evenprime.bukkit.nocheat.data.NukeData;
+import cc.co.evenprime.bukkit.nocheat.data.PermissionData;
+import cc.co.evenprime.bukkit.nocheat.listeners.NukeBlockListener;
+
+
+public class NukeCheck extends Check {
+
+	private String kickMessage;
+	private String logMessage;
+	
+	public NukeCheck(NoCheat plugin, NoCheatConfiguration config) {
+
+		super(plugin, "nuke", PermissionData.PERMISSION_NUKE, config);
+
+	}
+
+	@Override
+	protected void configure(NoCheatConfiguration config) {
+
+		
+		
+		try {
+			kickMessage = config.getStringValue("nuke.kickmessage");
+			logMessage = config.getStringValue("nuke.logmessage").
+			replace("[player]", "%1$s");
+			
+			setActive(config.getBooleanValue("active.nuke"));
+		} catch (ConfigurationException e) {
+			setActive(false);
+			e.printStackTrace();
+		}
+	}
+
+	public void check(BlockBreakEvent event) {
+
+		if(skipCheck(event.getPlayer())) {
+			return;
+		}
+		
+		NukeData data = NukeData.get(event.getPlayer());
+		
+		Block block = event.getBlock();
+
+		Location eyes = event.getPlayer().getEyeLocation();
+		Vector direction = eyes.getDirection();
+
+		double x1 = (double)block.getX() - eyes.getX();
+		double y1 = (double)block.getY() - eyes.getY();
+		double z1 = (double)block.getZ() - eyes.getZ();
+
+		double x2 = x1 + 1;
+		double y2 = y1 + 1;
+		double z2 = z1 + 1;
+
+		double factor = 1 + direction.distance(new Vector(x1 + 0.5, y1 + 0.5, z1 + 0.5));
+		double errorMargin = 1.2 / factor;
+		
+
+		if(factor * direction.getX() >= x1 - errorMargin && factor * direction.getY() >= y1 - errorMargin && factor * direction.getZ() >= z1 - errorMargin &&
+		   factor * direction.getX() <= x2 + errorMargin && factor * direction.getY() <= y2 + errorMargin && factor * direction.getZ() <= z2 + errorMargin) {
+			if(data.counter > 0) {
+				data.counter--;
+			}
+		}
+		else {
+			data.counter++;
+			event.setCancelled(true);
+			
+			if(data.counter > 20) {
+				
+				String log = String.format(Locale.US, logMessage, event.getPlayer().getName());
+				
+				plugin.log(Level.SEVERE, log);
+				
+				event.getPlayer().kickPlayer(kickMessage);
+				data.counter = 0; // Reset to prevent problems on next login
+			}
+		}
+
+		
+	}
+
+	public void check(BlockDamageEvent event) {
+
+	}
+
+	@Override
+	protected void registerListeners() {
+		PluginManager pm = Bukkit.getServer().getPluginManager();
+
+		Listener blockListener = new NukeBlockListener(this);
+
+		// Register listeners for moving check
+		pm.registerEvent(Event.Type.BLOCK_BREAK, blockListener, Priority.Lowest, plugin);
+		pm.registerEvent(Event.Type.BLOCK_DAMAGE, blockListener, Priority.Monitor, plugin);
+
+
+	}
+
+}

src/cc/co/evenprime/bukkit/nocheat/config/NoCheatConfiguration.java

@@ -104,6 +104,8 @@ public class NoCheatConfiguration {
 					SimpleYaml.getBoolean("active.airbuild", false, yamlContent)));
 			activeNode.add(new BooleanOption("bogusitems", 
 					SimpleYaml.getBoolean("active.bogusitems", false, yamlContent)));
+			activeNode.add(new BooleanOption("nuke", 
+					SimpleYaml.getBoolean("active.nuke", false, yamlContent)));
 		}
 
 		/*** SPEEDHACK section ***/
@@ -230,6 +232,21 @@ public class NoCheatConfiguration {
 					SimpleYaml.getBoolean("bogusitems.checkops", false, yamlContent)));
 		}
 		
+
+		/*** NUKE section ***/
+		{
+			ParentOption nukeNode = new ParentOption("nuke", false);
+			root.add(nukeNode);
+			
+			nukeNode.add(new BooleanOption("checkops", 
+					SimpleYaml.getBoolean("nuke.checkops", false, yamlContent)));
+			nukeNode.add(new LongStringOption("logmessage", 
+					SimpleYaml.getString("nuke.logmessage", "Nuke: [player] tried to nuke the world", yamlContent)));
+			nukeNode.add(new LongStringOption("kickmessage", 
+					SimpleYaml.getString("nuke.kickmessage", "No nuking allowed", yamlContent)));
+			
+		}
+
 		/*** CUSTOMACTIONS section ***/
 		{
 			ParentOption customActionsNode = new ParentOption("customactions", true);

src/cc/co/evenprime/bukkit/nocheat/data/NukeData.java

@@ -0,0 +1,21 @@
+package cc.co.evenprime.bukkit.nocheat.data;
+
+import org.bukkit.entity.Player;
+
+import cc.co.evenprime.bukkit.nocheat.NoCheatData;
+
+public class NukeData {
+	
+	public int counter = 0;
+
+	public static NukeData get(Player p) {
+
+		NoCheatData data = NoCheatData.getPlayerData(p);
+
+		if(data.nuke == null) {
+			data.nuke = new NukeData();
+		}
+
+		return data.nuke;
+	}
+}

src/cc/co/evenprime/bukkit/nocheat/data/PermissionData.java

@@ -6,10 +6,10 @@ import cc.co.evenprime.bukkit.nocheat.NoCheatData;
 
 public class PermissionData {
 
-	public long lastUpdate[] = new long[10];
-	public boolean cache[] = new boolean[10];
+	public long lastUpdate[] = new long[11];
+	public boolean cache[] = new boolean[11];
 	
-	public static final String[] permissionNames = new String[10];
+	public static final String[] permissionNames = new String[11];
 	
 	public static final int PERMISSION_MOVING = 0;
 	public static final int PERMISSION_FLYING = 1;
@@ -21,6 +21,7 @@ public class PermissionData {
 	public static final int PERMISSION_ITEMDUPE = 7;
 	public static final int PERMISSION_FAKESNEAK = 8;
 	public static final int PERMISSION_FASTSWIM = 9;
+	public static final int PERMISSION_NUKE = 10;
 	
 	static {
 		permissionNames[PERMISSION_AIRBUILD] = "nocheat.airbuild";
@@ -33,6 +34,7 @@ public class PermissionData {
 		permissionNames[PERMISSION_ITEMDUPE] = "nocheat.itemdupe";
 		permissionNames[PERMISSION_FAKESNEAK] = "nocheat.fakesneak";
 		permissionNames[PERMISSION_FASTSWIM] = "nocheat.fastswim";
+		permissionNames[PERMISSION_NUKE] = "nocheat.nuke";
 	}
 	
 	public static PermissionData get(Player p) {

src/cc/co/evenprime/bukkit/nocheat/listeners/NukeBlockListener.java

@@ -0,0 +1,30 @@
+package cc.co.evenprime.bukkit.nocheat.listeners;
+
+import org.bukkit.event.block.BlockBreakEvent;
+import org.bukkit.event.block.BlockDamageEvent;
+import org.bukkit.event.block.BlockListener;
+
+import cc.co.evenprime.bukkit.nocheat.checks.NukeCheck;
+
+public class NukeBlockListener extends BlockListener {
+
+	private NukeCheck check;
+	
+	public NukeBlockListener(NukeCheck check) {
+		this.check = check;
+		
+	}
+	@Override
+	public void onBlockDamage(BlockDamageEvent event) {
+		
+		//System.out.println("Damage "+ event.getInstaBreak() + " " + event.getItemInHand() + " " + event.getBlock());
+		check.check(event);
+	}
+	
+	@Override
+	public void onBlockBreak(BlockBreakEvent event) {
+		//System.out.println("Break "+ event.getPlayer() + " " + event.getBlock());
+		check.check(event);
+	}
+	
+}

src/cc/co/evenprime/bukkit/nocheat/wizard/gui/Explainations.java

@@ -32,6 +32,10 @@ public class Explainations {
 				"If one of your plugins intentionally produces such bogus items, you should not activate this (or you'll likely lose them).\n" +
 				"By default OPs are not checked (can be changed in the 'bogusitems' section).\n" +
 				"(Permissions plugin): Only players that don't have the permission 'nocheat.bogusitems' will be checked.");
+		set("active.nuke", "If activated, players will no longer be allowed to destroy blocks that are not in front of them.\n" +
+				"Because this is done by most 'nuke' hack-clients, it is easy to prevent (for now). If a player tries destroying\n" +
+				"blocks that are outside his field of sight, he'll get kicked from the server.\n" +
+				"This is only a temporary solution (and will probably not hold for long), but it's better than nothing, I guess...");
 		
 		set("logging.filename", "Determines where the various messages by NoCheat are stored at, if logging to file is activated.");
 		set("logging.logtofile", "Determine what severeness messages need to have to be printed to the logfile.\n" +
@@ -172,6 +176,12 @@ public class Explainations {
 		
 		set("bedteleport.checkops", "Also check players with OP-status, unless there is another reason\n" +
 				"to not check them, e.g. they got the relevant permission from a Permissions plugin.");
+		
+		set("nuke.logmessage", "The message that appears in your logs if somebody gets kicked for trying to nuke\n" +
+				"the server map");
+		set("nuke.kickmessage", "The message that is shown to players that get kicked for nuking");
+		set("nuke.checkops",  "Also check players with OP-status, unless there is another reason\n" +
+				"to not check them, e.g. they got the relevant permission from a Permissions plugin.");
 	}
 	
 	private static void set(String id, String text) {