Paper/Spigot-Server-Patches/0564-Buffer-joins-to-world.patch

51 lines
2.4 KiB
Diff
Raw Normal View History

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Wed, 19 Aug 2020 05:05:54 +0100
Subject: [PATCH] Buffer joins to world
This patch buffers the number of logins which will attempt to join
the world per tick, this attempts to reduce the impact that join floods
has on the server
diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
2020-08-25 14:23:58 +02:00
index 9fc12595a566f216620a7fb296d2d30e22332689..f65d3545039a2c471819ab5950c171ef6193cdb4 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -452,4 +452,9 @@ public class PaperConfig {
maxPlayerAutoSavePerTick = (playerAutoSaveRate == -1 || playerAutoSaveRate > 100) ? 10 : 20;
}
}
+
+ public static int maxJoinsPerTick;
+ private static void maxJoinsPerTick() {
2020-08-25 14:23:58 +02:00
+ maxJoinsPerTick = getInt("settings.max-joins-per-tick", 3);
+ }
}
diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
index 48fc9f40050685ea08af8da54ae8a00cf3d8ee36..c9b36e6040f03e6cee46989bab8415d829f8eef4 100644
--- a/src/main/java/net/minecraft/server/NetworkManager.java
+++ b/src/main/java/net/minecraft/server/NetworkManager.java
@@ -363,10 +363,22 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
}
// Paper end
+ private static final int MAX_PER_TICK = com.destroystokyo.paper.PaperConfig.maxJoinsPerTick; // Paper
+ private static int joinAttemptsThisTick; // Paper
+ private static int currTick; // Paper
public void a() {
this.p();
+ // Paper start
+ if (currTick != MinecraftServer.currentTick) {
+ currTick = MinecraftServer.currentTick;
+ joinAttemptsThisTick = 0;
+ }
+ // Paper end
if (this.packetListener instanceof LoginListener) {
+ if ( ((LoginListener) this.packetListener).getLoginState() != LoginListener.EnumProtocolState.READY_TO_ACCEPT // Paper
+ || (joinAttemptsThisTick++ < MAX_PER_TICK)) { // Paper - limit the number of joins which can be processed each tick
((LoginListener) this.packetListener).tick();
+ } // Paper
}
if (this.packetListener instanceof PlayerConnection) {