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Fix a few of my patches being formatted incorrectly & fix the Minecart/Boat lag/crash exploit (#13)

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* Fix a few of my patches being formatted incorrectly

* Limit amount of vehicle collision checks to 3 and discard vehicles if they collide with more than 15 other entities
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Allink 2022-04-28 08:55:02 +01:00 committed by GitHub
parent dc1a5399f7
commit 6f32742d79
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3 changed files with 117 additions and 8 deletions
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patches/server/0030-Limit-amount-of-vehicle-collision-checks-to-3-and-di.patch Normal file
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@ -0,0 +1,109 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Business Goose <arclicious@vivaldi.net>
Date: Thu, 21 Apr 2022 13:52:32 +0100
Subject: [PATCH] Limit amount of vehicle collision checks to 3 and discard
vehicles if they collide with more than 15 other entities
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java b/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
index 309bafd257d4932cfd69c2c212b32306938cd234..17c6aef70089730d9ca3d20d242f6755851b9494 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/AbstractMinecart.java
@@ -8,6 +8,7 @@ import com.mojang.datafixers.util.Pair;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
+import java.util.concurrent.TimeUnit;
import javax.annotation.Nullable;
import net.minecraft.BlockUtil;
import net.minecraft.Util;
@@ -109,6 +110,7 @@ public abstract class AbstractMinecart extends Entity {
private double flyingX = 0.949999988079071D; // Paper - restore vanilla precision
private double flyingY = 0.949999988079071D; // Paper - restore vanilla precision
private double flyingZ = 0.949999988079071D; // Paper - restore vanilla precision
+ private long lastLargeCollision = 0L; // Scissors - Add a collision debounce
public double maxSpeed = 0.4D;
// CraftBukkit end
@@ -425,8 +427,10 @@ public abstract class AbstractMinecart extends Entity {
if (this.getMinecartType() == AbstractMinecart.Type.RIDEABLE && this.getDeltaMovement().horizontalDistanceSqr() > 0.01D) {
List<Entity> list = this.level.getEntities(this, this.getBoundingBox().inflate(0.20000000298023224D, 0.0D, 0.20000000298023224D), EntitySelector.pushableBy(this));
- if (!list.isEmpty()) {
- for (int l = 0; l < list.size(); ++l) {
+ // Scissors - Add a collision debounce
+ if (!list.isEmpty() && (System.currentTimeMillis() - lastLargeCollision) >= TimeUnit.SECONDS.toMillis(5)) { // Using TimeUnit for better code readability
+ // Scissors - Limit amount of vehicle collision checks to 3 maximum
+ for (int l = 0; l < Math.min(3, list.size()); ++l) {
Entity entity = (Entity) list.get(l);
if (!(entity instanceof Player) && !(entity instanceof IronGolem) && !(entity instanceof AbstractMinecart) && !this.isVehicle() && !entity.isPassenger()) {
@@ -453,6 +457,16 @@ public abstract class AbstractMinecart extends Entity {
entity.push(this);
}
}
+
+ // Scissors - Add a collision debounce
+ if (list.size() > 3) {
+ lastLargeCollision = System.currentTimeMillis();
+ }
+
+ // Scissors - Delete entity if the collision amount is over 15
+ if (list.size() > 15) {
+ this.discard();
+ }
}
} else {
Iterator iterator = this.level.getEntities(this, this.getBoundingBox().inflate(0.20000000298023224D, 0.0D, 0.20000000298023224D)).iterator();
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/Boat.java b/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
index 391454a58d18d7373b974e094fd62514ca0d0b6b..52b75015c89be054ef2bfe1f4780a69540b0f032 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/Boat.java
@@ -4,6 +4,7 @@ import com.google.common.collect.Lists;
import com.google.common.collect.UnmodifiableIterator;
import java.util.Iterator;
import java.util.List;
+import java.util.concurrent.TimeUnit;
import javax.annotation.Nullable;
import net.minecraft.BlockUtil;
import net.minecraft.core.BlockPos;
@@ -108,6 +109,7 @@ public class Boat extends Entity {
public double unoccupiedDeceleration = -1;
public boolean landBoats = false;
// CraftBukkit end
+ private long lastLargeCollision = 0L; // Scissors - Add a collision debounce
public Boat(EntityType<? extends Boat> type, Level world) {
super(type, world);
@@ -400,10 +402,12 @@ public class Boat extends Entity {
this.checkInsideBlocks();
List<Entity> list = this.level.getEntities(this, this.getBoundingBox().inflate(0.20000000298023224D, -0.009999999776482582D, 0.20000000298023224D), EntitySelector.pushableBy(this));
- if (!list.isEmpty()) {
+ // Scissors - Add collision debounce
+ if (!list.isEmpty() && (System.currentTimeMillis() - lastLargeCollision) >= TimeUnit.SECONDS.toMillis(5)) { // Using TimeUnit for better code readability
boolean flag = !this.level.isClientSide && !(this.getControllingPassenger() instanceof Player);
- for (int j = 0; j < list.size(); ++j) {
+ // Scissors - Limit amount of vehicle collision checks to 3 maximum
+ for (int j = 0; j < Math.min(3, list.size()); ++j) {
Entity entity = (Entity) list.get(j);
if (!entity.hasPassenger(this)) {
@@ -414,6 +418,16 @@ public class Boat extends Entity {
}
}
}
+
+ // Scissors - Add collision debounce
+ if (list.size() > 3) {
+ lastLargeCollision = System.currentTimeMillis();
+ }
+
+ // Scissors - Delete entity if the collision amount is over 15
+ if (list.size() > 15) {
+ this.discard();
+ }
}
}