Paper/Spigot-Server-Patches/0176-revert-serverside-behavior-of-keepalives.patch
Aikar 36f34f01c0
Updated Upstream (Bukkit/CraftBukkit)
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
da9ef3c5 #496: Add methods to get/set ItemStacks in EquipmentSlots
3abebc9f #492: Let Tameable extend Animals rather than Entity
941111a0 #495: Expose ItemStack and hand used in PlayerShearEntityEvent
4fe19cae #494: InventoryView - Add missing Brewing FUEL_TIME

CraftBukkit Changes:
933e9094 #664: Add methods to get/set ItemStacks in EquipmentSlots
18722312 #662: Expose ItemStack and hand used in PlayerShearEntityEvent
2020-05-06 06:05:22 -04:00

76 lines
4.5 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Sun, 15 Oct 2017 00:29:07 +0100
Subject: [PATCH] revert serverside behavior of keepalives
This patch intends to bump up the time that a client has to reply to the
server back to 30 seconds as per pre 1.12.2, which allowed clients
more than enough time to reply potentially allowing them to be less
tempermental due to lag spikes on the network thread, e.g. that caused
by plugins that are interacting with netty.
We also add a system property to allow people to tweak how long the server
will wait for a reply. There is a compromise here between lower and higher
values, lower values will mean that dead connections can be closed sooner,
whereas higher values will make this less sensitive to issues such as spikes
from networking or during connections flood of chunk packets on slower clients,
at the cost of dead connections being kept open for longer.
diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index d4a649a83f8e0497898108c52faf4baf9ba824f9..2a3771d0650b404dd0729c63dd0bacb40213197d 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -70,7 +70,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
private final MinecraftServer minecraftServer;
public EntityPlayer player;
private int e;
- private long lastKeepAlive; private void setLastPing(long lastPing) { this.lastKeepAlive = lastPing;}; private long getLastPing() { return this.lastKeepAlive;}; // Paper - OBFHELPER
+ private long lastKeepAlive = SystemUtils.getMonotonicMillis(); private void setLastPing(long lastPing) { this.lastKeepAlive = lastPing;}; private long getLastPing() { return this.lastKeepAlive;}; // Paper - OBFHELPER
private boolean awaitingKeepAlive; private void setPendingPing(boolean isPending) { this.awaitingKeepAlive = isPending;}; private boolean isPendingPing() { return this.awaitingKeepAlive;}; // Paper - OBFHELPER
private long h; private void setKeepAliveID(long keepAliveID) { this.h = keepAliveID;}; private long getKeepAliveID() {return this.h; }; // Paper - OBFHELPER
// CraftBukkit start - multithreaded fields
@@ -101,6 +101,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
private int E;
private int receivedMovePackets;
private int processedMovePackets;
+ private static final long KEEPALIVE_LIMIT = Long.getLong("paper.playerconnection.keepalive", 30) * 1000; // Paper - provide property to set keepalive limit
public PlayerConnection(MinecraftServer minecraftserver, NetworkManager networkmanager, EntityPlayer entityplayer) {
this.minecraftServer = minecraftserver;
@@ -182,18 +183,26 @@ public class PlayerConnection implements PacketListenerPlayIn {
}
this.minecraftServer.getMethodProfiler().enter("keepAlive");
- long i = SystemUtils.getMonotonicMillis();
-
- if (i - this.lastKeepAlive >= 25000L) { // CraftBukkit
- if (this.awaitingKeepAlive) {
+ // Paper Start - give clients a longer time to respond to pings as per pre 1.12.2 timings
+ // This should effectively place the keepalive handling back to "as it was" before 1.12.2
+ long currentTime = SystemUtils.getMonotonicMillis();
+ long elapsedTime = currentTime - this.getLastPing();
+
+ if (this.isPendingPing()) {
+ if (!this.processedDisconnect && elapsedTime >= KEEPALIVE_LIMIT) { // check keepalive limit, don't fire if already disconnected
+ PlayerConnection.LOGGER.warn("{} was kicked due to keepalive timeout!", this.player.getName()); // more info
this.disconnect(new ChatMessage("disconnect.timeout", new Object[0]));
- } else {
- this.awaitingKeepAlive = true;
- this.lastKeepAlive = i;
- this.h = i;
- this.sendPacket(new PacketPlayOutKeepAlive(this.h));
+ }
+ } else {
+ if (elapsedTime >= 15000L) { // 15 seconds
+ this.setPendingPing(true);
+ this.setLastPing(currentTime);
+ this.setKeepAliveID(currentTime);
+ this.sendPacket(new PacketPlayOutKeepAlive(this.getKeepAliveID()));
+
}
}
+ // Paper end
this.minecraftServer.getMethodProfiler().exit();
// CraftBukkit start