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44 lines
2.1 KiB
Diff
44 lines
2.1 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: Wed, 19 Aug 2020 05:05:54 +0100
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Subject: [PATCH] Buffer joins to world
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This patch buffers the number of logins which will attempt to join
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the world per tick, this attempts to reduce the impact that join floods
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has on the server
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diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
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index dc3dea801a673462e767ad37268ec77ac95d214c..959d39e81cdde6fda90fcc95f842146448b4c6e4 100644
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--- a/src/main/java/net/minecraft/network/Connection.java
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+++ b/src/main/java/net/minecraft/network/Connection.java
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@@ -449,14 +449,29 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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}
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// Paper end
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+ private static final int MAX_PER_TICK = io.papermc.paper.configuration.GlobalConfiguration.get().misc.maxJoinsPerTick; // Paper
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+ private static int joinAttemptsThisTick; // Paper
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+ private static int currTick; // Paper
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public void tick() {
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this.flushQueue();
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+ // Paper start
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+ if (Connection.currTick != net.minecraft.server.MinecraftServer.currentTick) {
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+ Connection.currTick = net.minecraft.server.MinecraftServer.currentTick;
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+ Connection.joinAttemptsThisTick = 0;
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+ }
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+ // Paper end
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PacketListener packetlistener = this.packetListener;
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if (packetlistener instanceof TickablePacketListener) {
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TickablePacketListener tickablepacketlistener = (TickablePacketListener) packetlistener;
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+ // Paper start - limit the number of joins which can be processed each tick
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+ if (!(this.packetListener instanceof net.minecraft.server.network.ServerLoginPacketListenerImpl loginPacketListener)
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+ || loginPacketListener.state != net.minecraft.server.network.ServerLoginPacketListenerImpl.State.READY_TO_ACCEPT
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+ || Connection.joinAttemptsThisTick++ < MAX_PER_TICK) {
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tickablepacketlistener.tick();
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+ }
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+ // Paper end
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}
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if (!this.isConnected() && !this.disconnectionHandled) {
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