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0
geforkt von Mirrors/Paper
Paper/patches/server/0646-Add-packet-limiter-config.patch

109 Zeilen
6.1 KiB
Diff

2023-09-23 00:33:14 +02:00
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Fri, 30 Oct 2020 22:37:16 -0700
Subject: [PATCH] Add packet limiter config
Example config:
packet-limiter:
kick-message: '&cSent too many packets'
limits:
all:
interval: 7.0
max-packet-rate: 500.0
ServerboundPlaceRecipePacket:
interval: 4.0
max-packet-rate: 5.0
action: DROP
all section refers to all incoming packets, the action for all is
hard coded to KICK.
For specific limits, the section name is the class's name,
and an action can be defined: DROP or KICK
If interval or rate are less-than 0, the limit is ignored
diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
Updated Upstream (Bukkit/CraftBukkit) (#10242) * Updated Upstream (Bukkit/CraftBukkit) Upstream has released updates that appear 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: a6a9d2a4 Remove some old ApiStatus.Experimental annotations be72314c SPIGOT-7300, PR-829: Add new DamageSource API providing enhanced information about entity damage b252cf05 SPIGOT-7576, PR-970: Add methods in MushroomCow to change stew effects b1c689bd PR-902: Add Server#isLoggingIPs to get log-ips configuration 08f86d1c PR-971: Add Player methods for client-side potion effects 2e3024a9 PR-963: Add API for in-world structures a23292a7 SPIGOT-7530, PR-948: Improve Resource Pack API with new 1.20.3 functionality 1851857b SPIGOT-3071, PR-969: Add entity spawn method with spawn reason cde4c52a SPIGOT-5553, PR-964: Add EntityKnockbackEvent CraftBukkit Changes: 38fd4bd50 Fix accidentally renamed internal damage method 80f0ce4be SPIGOT-7300, PR-1180: Add new DamageSource API providing enhanced information about entity damage 7e43f3b16 SPIGOT-7581: Fix typo in BlockMushroom ea14b7d90 SPIGOT-7576, PR-1347: Add methods in MushroomCow to change stew effects 4c687f243 PR-1259: Add Server#isLoggingIPs to get log-ips configuration 22a541a29 Improve support for per-world game rules cb7dccce2 PR-1348: Add Player methods for client-side potion effects b8d6109f0 PR-1335: Add API for in-world structures 4398a1b5b SPIGOT-7577: Make CraftWindCharge#explode discard the entity e74107678 Fix Crafter maximum stack size 0bb0f4f6a SPIGOT-7530, PR-1314: Improve Resource Pack API with new 1.20.3 functionality 4949f556d SPIGOT-3071, PR-1345: Add entity spawn method with spawn reason 20ac73ca2 PR-1353: Fix Structure#place not working as documented with 0 palette 3c1b77871 SPIGOT-6911, PR-1349: Change max book length in CraftMetaBook 333701839 SPIGOT-7572: Bee nests generated without bees f48f4174c SPIGOT-5553, PR-1336: Add EntityKnockbackEvent
2024-02-11 22:28:00 +01:00
index 37b16918451859c22f92bcbcbce05c16b8beff75..22a7f17180b76b6c3548d3b54ae8218a469401a8 100644
2023-09-23 00:33:14 +02:00
--- a/src/main/java/net/minecraft/network/Connection.java
+++ b/src/main/java/net/minecraft/network/Connection.java
@@ -128,6 +128,22 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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return null;
}
// Paper end - add utility methods
+ // Paper start - packet limiter
+ protected final Object PACKET_LIMIT_LOCK = new Object();
+ protected final @Nullable io.papermc.paper.util.IntervalledCounter allPacketCounts = io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.allPackets.isEnabled() ? new io.papermc.paper.util.IntervalledCounter(
+ (long)(io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.allPackets.interval() * 1.0e9)
+ ) : null;
+ protected final java.util.Map<Class<? extends net.minecraft.network.protocol.Packet<?>>, io.papermc.paper.util.IntervalledCounter> packetSpecificLimits = new java.util.HashMap<>();
+
+ private boolean stopReadingPackets;
+ private void killForPacketSpam() {
+ this.sendPacket(new ClientboundDisconnectPacket(io.papermc.paper.adventure.PaperAdventure.asVanilla(io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.kickMessage)), PacketSendListener.thenRun(() -> {
+ this.disconnect(io.papermc.paper.adventure.PaperAdventure.asVanilla(io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.kickMessage));
+ }), true);
+ this.setReadOnly();
+ this.stopReadingPackets = true;
+ }
+ // Paper end - packet limiter
public Connection(PacketFlow side) {
this.receiving = side;
@@ -220,6 +236,55 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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if (packetlistener == null) {
throw new IllegalStateException("Received a packet before the packet listener was initialized");
} else {
+ // Paper start - packet limiter
+ if (this.stopReadingPackets) {
+ return;
+ }
+ if (this.allPacketCounts != null ||
+ io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.overrides.containsKey(packet.getClass())) {
+ long time = System.nanoTime();
+ synchronized (PACKET_LIMIT_LOCK) {
+ if (this.allPacketCounts != null) {
+ this.allPacketCounts.updateAndAdd(1, time);
+ if (this.allPacketCounts.getRate() >= io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.allPackets.maxPacketRate()) {
+ this.killForPacketSpam();
+ return;
+ }
+ }
+
+ for (Class<?> check = packet.getClass(); check != Object.class; check = check.getSuperclass()) {
+ io.papermc.paper.configuration.GlobalConfiguration.PacketLimiter.PacketLimit packetSpecificLimit =
+ io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.overrides.get(check);
+ if (packetSpecificLimit == null || !packetSpecificLimit.isEnabled()) {
+ continue;
+ }
+ io.papermc.paper.util.IntervalledCounter counter = this.packetSpecificLimits.computeIfAbsent((Class)check, (clazz) -> {
+ return new io.papermc.paper.util.IntervalledCounter((long)(packetSpecificLimit.interval() * 1.0e9));
+ });
+ counter.updateAndAdd(1, time);
+ if (counter.getRate() >= packetSpecificLimit.maxPacketRate()) {
+ switch (packetSpecificLimit.action()) {
+ case DROP:
+ return;
+ case KICK:
+ String deobfedPacketName = io.papermc.paper.util.ObfHelper.INSTANCE.deobfClassName(check.getName());
+
+ String playerName;
+ if (this.packetListener instanceof net.minecraft.server.network.ServerCommonPacketListenerImpl impl) {
+ playerName = impl.getOwner().getName();
+ } else {
+ playerName = this.getLoggableAddress(net.minecraft.server.MinecraftServer.getServer().logIPs());
+ }
+
+ Connection.LOGGER.warn("{} kicked for packet spamming: {}", playerName, deobfedPacketName.substring(deobfedPacketName.lastIndexOf(".") + 1));
+ this.killForPacketSpam();
+ return;
+ }
+ }
+ }
+ }
+ }
+ // Paper end - packet limiter
if (packetlistener.shouldHandleMessage(packet)) {
try {
Connection.genericsFtw(packet, packetlistener);