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Limit auto recipe packets

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This commit is contained in:
Shane Freeder 2020-12-12 23:53:40 +00:00
parent 9c9583cd2b
commit 458db6206d
1 changed files with 84 additions and 0 deletions
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Spigot-Server-Patches/0615-Limit-recipe-packets.patch Normal file
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@ -0,0 +1,84 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Sat, 12 Dec 2020 23:45:28 +0000
Subject: [PATCH] Limit recipe packets
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index 6ab0a51b421dc696aec292f2db955311c9cc31e3..cdf1177ca7b4b1b0808176c455f62b395146da50 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -326,6 +326,13 @@ public class PaperConfig {
tabSpamLimit = getInt("settings.spam-limiter.tab-spam-limit", tabSpamLimit);
}
+ public static int autoRecipeIncrement = 1;
+ public static int autoRecipeLimit = 20;
+ private static void autoRecipieLimiters() {
+ autoRecipeIncrement = getInt("settings.spam-limiter.recipe-spam-increment", autoRecipeIncrement);
+ autoRecipeLimit = getInt("settings.spam-limiter.recipe-spam-limit", autoRecipeLimit);
+ }
+
public static boolean velocitySupport;
public static boolean velocityOnlineMode;
public static byte[] velocitySecretKey;
diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index 0aac84e9800788947bb75b04307ba6fffb57dab8..3e1f88bce8e0ba95f73bca204549db0c65b1465e 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -1,5 +1,6 @@
package net.minecraft.server;
+import com.destroystokyo.paper.PaperConfig;
import com.google.common.collect.Lists;
import com.google.common.primitives.Doubles;
import com.google.common.primitives.Floats;
@@ -21,7 +22,7 @@ import java.util.function.Consumer;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.annotation.Nullable;
-import org.apache.commons.lang3.StringEscapeUtils;
+
import org.apache.commons.lang3.StringUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
@@ -29,6 +30,8 @@ import org.apache.logging.log4j.Logger;
// CraftBukkit start
import java.util.concurrent.ExecutionException;
import java.util.concurrent.atomic.AtomicIntegerFieldUpdater;
+
+import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.craftbukkit.entity.CraftPlayer;
import org.bukkit.craftbukkit.event.CraftEventFactory;
@@ -85,6 +88,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
private volatile int chatThrottle;
private static final AtomicIntegerFieldUpdater chatSpamField = AtomicIntegerFieldUpdater.newUpdater(PlayerConnection.class, "chatThrottle");
private final java.util.concurrent.atomic.AtomicInteger tabSpamLimiter = new java.util.concurrent.atomic.AtomicInteger(); // Paper - configurable tab spam limits
+ private final java.util.concurrent.atomic.AtomicInteger recipeSpamPackets = new java.util.concurrent.atomic.AtomicInteger(); // Paper - auto recipe limit
// CraftBukkit end
private int j;
private final Int2ShortMap k = new Int2ShortOpenHashMap();
@@ -233,6 +237,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
// CraftBukkit start
for (int spam; (spam = this.chatThrottle) > 0 && !chatSpamField.compareAndSet(this, spam, spam - 1); ) ;
if (tabSpamLimiter.get() > 0) tabSpamLimiter.getAndDecrement(); // Paper - split to seperate variable
+ if (recipeSpamPackets.get() > 0) recipeSpamPackets.getAndDecrement(); // Paper
/* Use thread-safe field access instead
if (this.chatThrottle > 0) {
--this.chatThrottle;
@@ -2617,6 +2622,14 @@ public class PlayerConnection implements PacketListenerPlayIn {
@Override
public void a(PacketPlayInAutoRecipe packetplayinautorecipe) {
+ // Paper start
+ if (!Bukkit.isPrimaryThread()) {
+ if (recipeSpamPackets.addAndGet(PaperConfig.autoRecipeIncrement) > PaperConfig.autoRecipeLimit) {
+ minecraftServer.scheduleOnMain(() -> this.disconnect(new ChatMessage("disconnect.spam", new Object[0]))); // Paper
+ return;
+ }
+ }
+ // Paper end
PlayerConnectionUtils.ensureMainThread(packetplayinautorecipe, this, this.player.getWorldServer());
this.player.resetIdleTimer();
if (!this.player.isSpectator() && this.player.activeContainer.windowId == packetplayinautorecipe.b() && this.player.activeContainer.c(this.player) && this.player.activeContainer instanceof ContainerRecipeBook) {