Paper/patches/server/0787-Kick-on-main-for-illegal-chat.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Nassim Jahnke <nassim@njahnke.dev>
Date: Mon, 17 Jan 2022 19:47:19 +0100
Subject: [PATCH] Kick on main for illegal chat

Makes the PlayerKickEvent fire on the main thread for
illegal characters or chat out-of-order errors.

diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 60024e98de6a910e4db6d45d6be427a0dea6f568..c50ac593ad5db6b65015151bcc26a9b8ed510ba5 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2168,7 +2168,9 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
         }
         // CraftBukkit end
         if (ServerGamePacketListenerImpl.isChatMessageIllegal(packet.message())) {
+            this.server.scheduleOnMain(() -> { // Paper - push to main for event firing
             this.disconnect(Component.translatable("multiplayer.disconnect.illegal_characters"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_CHARACTERS); // Paper - add cause
+            }); // Paper - push to main for event firing
         } else {
             Optional<LastSeenMessages> optional = this.tryHandleChat(packet.message(), packet.timeStamp(), packet.lastSeenMessages());
 
@@ -2202,7 +2204,9 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
     @Override
     public void handleChatCommand(ServerboundChatCommandPacket packet) {
         if (ServerGamePacketListenerImpl.isChatMessageIllegal(packet.command())) {
+            this.server.scheduleOnMain(() -> { // Paper - push to main for event firing
             this.disconnect(Component.translatable("multiplayer.disconnect.illegal_characters"), org.bukkit.event.player.PlayerKickEvent.Cause.ILLEGAL_CHARACTERS); // Paper
+            }); // Paper - push to main for event firing
         } else {
             Optional<LastSeenMessages> optional = this.tryHandleChat(packet.command(), packet.timeStamp(), packet.lastSeenMessages());
 
@@ -2282,7 +2286,9 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
     private Optional<LastSeenMessages> tryHandleChat(String message, Instant timestamp, LastSeenMessages.Update acknowledgment) {
         if (!this.updateChatOrder(timestamp)) {
             ServerGamePacketListenerImpl.LOGGER.warn("{} sent out-of-order chat: '{}'", this.player.getName().getString(), message);
+            this.server.scheduleOnMain(() -> { // Paper - push to main
             this.disconnect(Component.translatable("multiplayer.disconnect.out_of_order_chat"), org.bukkit.event.player.PlayerKickEvent.Cause.OUT_OF_ORDER_CHAT); // Paper - kick event ca
+            }); // Paper - push to main
             return Optional.empty();
         } else if (this.player.isRemoved() || this.player.getChatVisibility() == ChatVisiblity.HIDDEN) { // CraftBukkit - dead men tell no tales
             this.send(new ClientboundSystemChatPacket(Component.translatable("chat.disabled.options").withStyle(ChatFormatting.RED), false));