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https://github.com/PaperMC/Paper.git
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275173e538
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: 0c5d8709 SPIGOT-7400: Downgrade maven-resolver due to issues resolving certain depends 255c4fdb SPIGOT-7380: Add PlayerInteractEvent#getClickedPosition and ChiseledBookshelf#getSlot CraftBukkit Changes: b6b514b7e SPIGOT-7400: Downgrade maven-resolver due to issues resolving certain depends fcff84de9 SPIGOT-7399: Revert null check in CraftMetaItem#safelyAdd 44a4b5649 SPIGOT-7380: Add PlayerInteractEvent#getClickedPosition and ChiseledBookshelf#getSlot 676969d01 SPIGOT-7389: Handle setting null items in ChiseledBookshelf Inventory
99 lines
5.1 KiB
Diff
99 lines
5.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Fri, 30 Oct 2020 22:37:16 -0700
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Subject: [PATCH] Add packet limiter config
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Example config:
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packet-limiter:
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kick-message: '&cSent too many packets'
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limits:
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all:
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interval: 7.0
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max-packet-rate: 500.0
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ServerboundPlaceRecipePacket:
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interval: 4.0
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max-packet-rate: 5.0
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action: DROP
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all section refers to all incoming packets, the action for all is
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hard coded to KICK.
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For specific limits, the section name is the class's name,
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and an action can be defined: DROP or KICK
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If interval or rate are less-than 0, the limit is ignored
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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 890d14503e157d6c07a6db1f180f49f81118e301..347e1da7b5b890c297863736e62a8c225b112db2 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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@@ -158,6 +158,22 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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}
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}
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// Paper end - allow controlled flushing
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+ // Paper start - packet limiter
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+ protected final Object PACKET_LIMIT_LOCK = new Object();
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+ protected final @Nullable io.papermc.paper.util.IntervalledCounter allPacketCounts = io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.allPackets.isEnabled() ? new io.papermc.paper.util.IntervalledCounter(
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+ (long)(io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.allPackets.interval() * 1.0e9)
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+ ) : null;
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+ protected final java.util.Map<Class<? extends net.minecraft.network.protocol.Packet<?>>, io.papermc.paper.util.IntervalledCounter> packetSpecificLimits = new java.util.HashMap<>();
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+
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+ private boolean stopReadingPackets;
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+ private void killForPacketSpam() {
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+ this.sendPacket(new ClientboundDisconnectPacket(io.papermc.paper.adventure.PaperAdventure.asVanilla(io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.kickMessage)), PacketSendListener.thenRun(() -> {
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+ this.disconnect(io.papermc.paper.adventure.PaperAdventure.asVanilla(io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.kickMessage));
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+ }));
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+ this.setReadOnly();
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+ this.stopReadingPackets = true;
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+ }
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+ // Paper end - packet limiter
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public Connection(PacketFlow side) {
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this.receiving = side;
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@@ -246,6 +262,45 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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protected void channelRead0(ChannelHandlerContext channelhandlercontext, Packet<?> packet) {
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if (this.channel.isOpen()) {
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+ // Paper start - packet limiter
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+ if (this.stopReadingPackets) {
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+ return;
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+ }
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+ if (this.allPacketCounts != null ||
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+ io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.overrides.containsKey(packet.getClass())) {
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+ long time = System.nanoTime();
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+ synchronized (PACKET_LIMIT_LOCK) {
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+ if (this.allPacketCounts != null) {
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+ this.allPacketCounts.updateAndAdd(1, time);
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+ if (this.allPacketCounts.getRate() >= io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.allPackets.maxPacketRate()) {
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+ this.killForPacketSpam();
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+ return;
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+ }
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+ }
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+
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+ for (Class<?> check = packet.getClass(); check != Object.class; check = check.getSuperclass()) {
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+ io.papermc.paper.configuration.GlobalConfiguration.PacketLimiter.PacketLimit packetSpecificLimit =
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+ io.papermc.paper.configuration.GlobalConfiguration.get().packetLimiter.overrides.get(check);
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+ if (packetSpecificLimit == null || !packetSpecificLimit.isEnabled()) {
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+ continue;
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+ }
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+ io.papermc.paper.util.IntervalledCounter counter = this.packetSpecificLimits.computeIfAbsent((Class)check, (clazz) -> {
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+ return new io.papermc.paper.util.IntervalledCounter((long)(packetSpecificLimit.interval() * 1.0e9));
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+ });
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+ counter.updateAndAdd(1, time);
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+ if (counter.getRate() >= packetSpecificLimit.maxPacketRate()) {
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+ switch (packetSpecificLimit.action()) {
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+ case DROP:
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+ return;
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+ case KICK:
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+ this.killForPacketSpam();
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+ return;
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+ }
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+ }
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+ }
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+ }
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+ }
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+ // Paper end - packet limiter
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try {
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Connection.genericsFtw(packet, this.packetListener);
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} catch (RunningOnDifferentThreadException cancelledpackethandleexception) {
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