58 lines
2.9 KiB
Diff
58 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: 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/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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index faa1b775e45563b93ac1d5b904938b1f5ad8d80c..545948f20efd6c8dd42140b565af94cd6b52b661 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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@@ -457,4 +457,9 @@ public class PaperConfig {
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maxPlayerAutoSavePerTick = (playerAutoSaveRate == -1 || playerAutoSaveRate > 100) ? 10 : 20;
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}
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}
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+
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+ public static int maxJoinsPerTick;
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+ private static void maxJoinsPerTick() {
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+ maxJoinsPerTick = getInt("settings.max-joins-per-tick", 3);
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+ }
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}
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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 7607bf75968cc32d616e2b44e89901b3681b1131..d32b96a5f51d745869cfc40c01c54de58e1eb843 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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@@ -37,6 +37,7 @@ import net.minecraft.network.protocol.Packet;
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import net.minecraft.network.protocol.PacketFlow;
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import net.minecraft.network.protocol.game.ClientboundDisconnectPacket;
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import net.minecraft.network.protocol.login.ClientboundLoginDisconnectPacket;
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+import net.minecraft.server.MinecraftServer;
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import net.minecraft.server.RunningOnDifferentThreadException;
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import net.minecraft.server.network.ServerGamePacketListenerImpl;
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import net.minecraft.server.network.ServerLoginPacketListenerImpl;
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@@ -373,10 +374,22 @@ 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 = com.destroystokyo.paper.PaperConfig.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 (currTick != MinecraftServer.currentTick) {
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+ currTick = MinecraftServer.currentTick;
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+ joinAttemptsThisTick = 0;
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+ }
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+ // Paper end
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if (this.packetListener instanceof ServerLoginPacketListenerImpl) {
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+ if ( ((ServerLoginPacketListenerImpl) this.packetListener).getLoginState() != ServerLoginPacketListenerImpl.State.READY_TO_ACCEPT // Paper
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+ || (joinAttemptsThisTick++ < MAX_PER_TICK)) { // Paper - limit the number of joins which can be processed each tick
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((ServerLoginPacketListenerImpl) this.packetListener).tick();
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+ } // Paper
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}
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if (this.packetListener instanceof ServerGamePacketListenerImpl) {
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