From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Shane Freeder Date: Sun, 29 Jul 2018 05:02:15 +0100 Subject: [PATCH] Break up and make tab spam limits configurable Due to the changes in 1.13, clients will send a tab completion request for all bukkit commands in order to factor in the lack of support for brigadier and provide backwards support in the API. Craftbukkit, however; has moved the chat spam limiter to also interact with the tab completion request, which while good for avoiding abuse, causes 1.13 clients to easilly be kicked from a server in bukkit due to this. Removing the spam limit could cause issues for servers, however, there is no way for servers to manipulate this without blindly cancelling kick events, which only causes additional complications. This also causes issues in that the tab spam limit and chat share the same field but different limits, meaning that a player having typed a long command may be kicked from the server. Splitting the field up and making it configurable allows for server owners to take the burden of this into their own hand without having to rely on plugins doing unsafe things. diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java index 38d9abe5f34c17b66c8eaf40fac87fc16786f095..d991354d65305ab7d02666f7c3362e4136c3f6af 100644 --- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java +++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java @@ -262,6 +262,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic private long keepAliveChallenge; // CraftBukkit start - multithreaded fields private final AtomicInteger chatSpamTickCount = new AtomicInteger(); + private final java.util.concurrent.atomic.AtomicInteger tabSpamLimiter = new java.util.concurrent.atomic.AtomicInteger(); // Paper - configurable tab spam limits // CraftBukkit end private int dropSpamTickCount; private double firstGoodX; @@ -416,6 +417,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic this.server.getProfiler().pop(); // CraftBukkit start for (int spam; (spam = this.chatSpamTickCount.get()) > 0 && !this.chatSpamTickCount.compareAndSet(spam, spam - 1); ) ; + if (tabSpamLimiter.get() > 0) tabSpamLimiter.getAndDecrement(); // Paper - split to seperate variable /* Use thread-safe field access instead if (this.chatSpamTickCount > 0) { --this.chatSpamTickCount; @@ -793,7 +795,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic public void handleCustomCommandSuggestions(ServerboundCommandSuggestionPacket packet) { // PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel()); // Paper - run this async // CraftBukkit start - if (this.chatSpamTickCount.addAndGet(1) > 500 && !this.server.getPlayerList().isOp(this.player.getGameProfile())) { + if (this.chatSpamTickCount.addAndGet(io.papermc.paper.configuration.GlobalConfiguration.get().spamLimiter.tabSpamIncrement) > io.papermc.paper.configuration.GlobalConfiguration.get().spamLimiter.tabSpamLimit && !this.server.getPlayerList().isOp(this.player.getGameProfile())) { // Paper start - split and make configurable server.scheduleOnMain(() -> this.disconnect(Component.translatable("disconnect.spam", new Object[0]))); // Paper return; }