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Alternative Keepalive Handling

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This commit is contained in:
William Blake Galbreath
2025-01-05 12:26:40 -08:00
committed by granny
parent 32db32c5ae
commit 4c9961c7d1
3 changed files with 53 additions and 73 deletions
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73
patches/server/0017-Alternative-Keepalive-Handling.patch
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@@ -1,73 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Fri, 11 Oct 2019 00:17:39 -0500
Subject: [PATCH] Alternative Keepalive Handling
diff --git a/net/minecraft/server/network/ServerCommonPacketListenerImpl.java b/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
index 92749b57d3a2b2ffee79436319513248846296b6..df48c2754dc1ebd52addd8ae768cba5916ce3969 100644
--- a/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
+++ b/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
@@ -80,6 +80,7 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
private long keepAliveChallenge;
private long closedListenerTime;
private boolean closed = false;
+ private it.unimi.dsi.fastutil.longs.LongList keepAlives = new it.unimi.dsi.fastutil.longs.LongArrayList(); // Purpur
private int latency;
private volatile boolean suspendFlushingOnServerThread = false;
public final java.util.Map<java.util.UUID, net.kyori.adventure.resource.ResourcePackCallback> packCallbacks = new java.util.concurrent.ConcurrentHashMap<>(); // Paper - adventure resource pack callbacks
@@ -137,6 +138,16 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
@Override
public void handleKeepAlive(ServerboundKeepAlivePacket packet) {
+ // Purpur start
+ if (org.purpurmc.purpur.PurpurConfig.useAlternateKeepAlive) {
+ if (this.keepAlivePending && !keepAlives.isEmpty() && keepAlives.contains(packet.getId())) {
+ int ping = (int) (Util.getMillis() - packet.getId());
+ this.latency = (this.latency * 3 + ping) / 4;
+ this.keepAlivePending = false;
+ keepAlives.clear(); // we got a valid response, lets roll with it and forget the rest
+ }
+ } else
+ // Purpur end
//PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel()); // CraftBukkit // Paper - handle ServerboundKeepAlivePacket async
if (this.keepAlivePending && packet.getId() == this.keepAliveChallenge) {
int i = (int) (Util.getMillis() - this.keepAliveTime);
@@ -269,6 +280,21 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
long currentTime = Util.getMillis();
long elapsedTime = currentTime - this.keepAliveTime;
+ // Purpur start
+ if (org.purpurmc.purpur.PurpurConfig.useAlternateKeepAlive) {
+ if (elapsedTime >= 1000L) { // 1 second
+ if (this.keepAlivePending && !this.processedDisconnect && keepAlives.size() * 1000L >= KEEPALIVE_LIMIT) {
+ this.disconnect(ServerCommonPacketListenerImpl.TIMEOUT_DISCONNECTION_MESSAGE, org.bukkit.event.player.PlayerKickEvent.Cause.TIMEOUT);
+ } else if (this.checkIfClosed(currentTime)) {
+ this.keepAlivePending = true;
+ this.keepAliveTime = currentTime; // hijack this field for 1 second intervals
+ this.keepAlives.add(currentTime); // currentTime is ID
+ this.send(new ClientboundKeepAlivePacket(currentTime));
+ }
+ }
+ } else
+ // Purpur end
+
if (!this.isSingleplayerOwner() && elapsedTime >= 15000L) { // Paper - use vanilla's 15000L between keep alive packets
if (this.keepAlivePending && !this.processedDisconnect && elapsedTime >= KEEPALIVE_LIMIT) { // Paper - check keepalive limit, don't fire if already disconnected
this.disconnect(ServerCommonPacketListenerImpl.TIMEOUT_DISCONNECTION_MESSAGE, PlayerKickEvent.Cause.TIMEOUT); // Paper - kick event cause
diff --git a/src/main/java/org/purpurmc/purpur/PurpurConfig.java b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
index bfa985913f3f750a0727a567d3b5951b4d6ed4ca..2ca6cc6ba72339459d9591a89995521a3c81d111 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
@@ -201,6 +201,11 @@ public class PurpurConfig {
laggingThreshold = getDouble("settings.lagging-threshold", laggingThreshold);
}
+ public static boolean useAlternateKeepAlive = false;
+ private static void useAlternateKeepAlive() {
+ useAlternateKeepAlive = getBoolean("settings.use-alternate-keepalive", useAlternateKeepAlive);
+ }
+
public static int barrelRows = 3;
public static boolean enderChestSixRows = false;
public static boolean enderChestPermissionRows = false;