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efbed65ab4
Commit
0a90cabf19
@ -28,10 +28,45 @@ import de.steamwar.techhider.TechHider;
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import org.bukkit.Bukkit;
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import org.bukkit.entity.Player;
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import java.util.function.Function;
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public class AntiNocom {
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public AntiNocom() {
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TinyProtocol.instance.addFilter(blockDig, this::onDig);
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if(Core.getVersion() > 8) {
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registerUseItem();
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}
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}
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private void registerUseItem() {
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Class<?> useItem = Reflection.getClass("{nms.network.protocol.game}.PacketPlayInUseItem");
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Function<Object, Object> getPosition;
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if(Core.getVersion() > 12) {
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Class<?> movingObjectPositionBlock = Reflection.getClass("{nms.world.phys}.MovingObjectPositionBlock");
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Reflection.FieldAccessor<?> useItemPosition = Reflection.getField(useItem, movingObjectPositionBlock, 0);
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Reflection.FieldAccessor<?> movingBlockPosition = Reflection.getField(movingObjectPositionBlock, TechHider.blockPosition, 0);
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getPosition = (packet) -> movingBlockPosition.get(useItemPosition.get(packet));
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} else {
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getPosition = Reflection.getField(blockDig, TechHider.blockPosition, 0)::get;
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}
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TinyProtocol.instance.addFilter(useItem, (player, packet) -> {
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Object pos = getPosition.apply(packet);
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int x = TechHider.blockPositionX.get(pos);
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int z = TechHider.blockPositionZ.get(pos);
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if(!player.getWorld().isChunkLoaded(ProtocolUtils.posToChunk(x), ProtocolUtils.posToChunk(z))) {
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Bukkit.getScheduler().runTask(Core.getInstance(), () -> player.kickPlayer(null));
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SWException.log(player.getName() + " kicked for using item on unloaded block (potential NoCom-DOS attack)", x + " " + z);
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return null;
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}
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return packet;
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});
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}
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private static final Class<?> blockDig = Reflection.getClass("{nms.network.protocol.game}.PacketPlayInBlockDig");
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