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89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
42 lines
2.9 KiB
Diff
42 lines
2.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Sat, 12 Dec 2020 23:45:28 +0000
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Subject: [PATCH] Limit recipe packets
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index e08c3e0d09896da60cbec7923882bc2263de1bae..5190939658fce990e166b7c4f5998dd030a156e8 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -257,6 +257,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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// CraftBukkit start - multithreaded fields
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private final AtomicInteger chatSpamTickCount = new AtomicInteger();
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private final java.util.concurrent.atomic.AtomicInteger tabSpamLimiter = new java.util.concurrent.atomic.AtomicInteger(); // Paper - configurable tab spam limits
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+ private final java.util.concurrent.atomic.AtomicInteger recipeSpamPackets = new java.util.concurrent.atomic.AtomicInteger(); // Paper - auto recipe limit
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// CraftBukkit end
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private int dropSpamTickCount;
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private double firstGoodX;
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@@ -376,6 +377,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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// CraftBukkit start
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for (int spam; (spam = this.chatSpamTickCount.get()) > 0 && !this.chatSpamTickCount.compareAndSet(spam, spam - 1); ) ;
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if (tabSpamLimiter.get() > 0) tabSpamLimiter.getAndDecrement(); // Paper - configurable tab spam limits
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+ if (recipeSpamPackets.get() > 0) recipeSpamPackets.getAndDecrement(); // Paper - auto recipe limit
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/* Use thread-safe field access instead
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if (this.chatSpamTickCount > 0) {
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--this.chatSpamTickCount;
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@@ -2978,6 +2980,14 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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@Override
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public void handlePlaceRecipe(ServerboundPlaceRecipePacket packet) {
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+ // Paper start - auto recipe limit
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+ if (!org.bukkit.Bukkit.isPrimaryThread()) {
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+ if (this.recipeSpamPackets.addAndGet(io.papermc.paper.configuration.GlobalConfiguration.get().spamLimiter.recipeSpamIncrement) > io.papermc.paper.configuration.GlobalConfiguration.get().spamLimiter.recipeSpamLimit) {
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+ this.server.scheduleOnMain(() -> this.disconnect(net.minecraft.network.chat.Component.translatable("disconnect.spam")));
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+ return;
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+ }
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+ }
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+ // Paper end - auto recipe limit
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PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
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this.player.resetLastActionTime();
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if (!this.player.isSpectator() && this.player.containerMenu.containerId == packet.getContainerId() && this.player.containerMenu instanceof RecipeBookMenu) {
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