mirror of
https://github.com/PaperMC/Paper.git
synced 2024-11-23 19:15:32 +01:00
206 lines
10 KiB
Diff
206 lines
10 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Spottedleaf <spottedleaf@spottedleaf.dev>
|
|
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
|
|
PacketPlayInAutoRecipe:
|
|
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/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
index bc91acb8b7e407092102e39037fc6f3fd380a073..da3eca94623a81d178166cc4689bb95a829837cc 100644
|
|
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
|
|
@@ -521,4 +521,102 @@ public class PaperConfig {
|
|
itemValidationBookAuthorLength = getInt("settings.item-validation.book.author", itemValidationBookAuthorLength);
|
|
itemValidationBookPageLength = getInt("settings.item-validation.book.page", itemValidationBookPageLength);
|
|
}
|
|
+
|
|
+ public static final class PacketLimit {
|
|
+ public final double packetLimitInterval;
|
|
+ public final double maxPacketRate;
|
|
+ public final ViolateAction violateAction;
|
|
+
|
|
+ public PacketLimit(final double packetLimitInterval, final double maxPacketRate, final ViolateAction violateAction) {
|
|
+ this.packetLimitInterval = packetLimitInterval;
|
|
+ this.maxPacketRate = maxPacketRate;
|
|
+ this.violateAction = violateAction;
|
|
+ }
|
|
+
|
|
+ public static enum ViolateAction {
|
|
+ KICK, DROP;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ public static String kickMessage;
|
|
+ public static PacketLimit allPacketsLimit;
|
|
+ public static java.util.Map<Class<? extends net.minecraft.network.protocol.Packet<?>>, PacketLimit> packetSpecificLimits = new java.util.HashMap<>();
|
|
+
|
|
+ private static void packetLimiter() {
|
|
+ packetSpecificLimits.clear();
|
|
+ kickMessage = org.bukkit.ChatColor.translateAlternateColorCodes('&', getString("settings.packet-limiter.kick-message", "&cSent too many packets"));
|
|
+ allPacketsLimit = new PacketLimit(
|
|
+ getDouble("settings.packet-limiter.limits.all.interval", 7.0),
|
|
+ getDouble("settings.packet-limiter.limits.all.max-packet-rate", 500.0),
|
|
+ PacketLimit.ViolateAction.KICK
|
|
+ );
|
|
+ if (allPacketsLimit.maxPacketRate <= 0.0 || allPacketsLimit.packetLimitInterval <= 0.0) {
|
|
+ allPacketsLimit = null;
|
|
+ }
|
|
+ final ConfigurationSection section = config.getConfigurationSection("settings.packet-limiter.limits");
|
|
+
|
|
+ // add default packets
|
|
+
|
|
+ // auto recipe limiting
|
|
+ getDouble("settings.packet-limiter.limits." +
|
|
+ "PacketPlayInAutoRecipe" + ".interval", 4.0);
|
|
+ getDouble("settings.packet-limiter.limits." +
|
|
+ "PacketPlayInAutoRecipe" + ".max-packet-rate", 5.0);
|
|
+ getString("settings.packet-limiter.limits." +
|
|
+ "PacketPlayInAutoRecipe" + ".action", PacketLimit.ViolateAction.DROP.name());
|
|
+
|
|
+ final Map<String, String> mojangToSpigot = new HashMap<>();
|
|
+ final Map<String, io.papermc.paper.util.ObfHelper.ClassMapping> maps = io.papermc.paper.util.ObfHelper.INSTANCE.mappingsByObfName();
|
|
+ if (maps != null) {
|
|
+ maps.forEach((spigotName, classMapping) ->
|
|
+ mojangToSpigot.put(classMapping.mojangName(), classMapping.obfName()));
|
|
+ }
|
|
+
|
|
+ for (final String packetClassName : section.getKeys(false)) {
|
|
+ if (packetClassName.equals("all")) {
|
|
+ continue;
|
|
+ }
|
|
+ Class<?> packetClazz = null;
|
|
+
|
|
+ for (final String subpackage : List.of("game", "handshake", "login", "status")) {
|
|
+ final String fullName = "net.minecraft.network.protocol." + subpackage + "." + packetClassName;
|
|
+ try {
|
|
+ packetClazz = Class.forName(fullName);
|
|
+ break;
|
|
+ } catch (final ClassNotFoundException ex) {
|
|
+ try {
|
|
+ final String spigot = mojangToSpigot.get(fullName);
|
|
+ if (spigot != null) {
|
|
+ packetClazz = Class.forName(spigot);
|
|
+ }
|
|
+ } catch (final ClassNotFoundException ignore) {}
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (packetClazz == null || !net.minecraft.network.protocol.Packet.class.isAssignableFrom(packetClazz)) {
|
|
+ MinecraftServer.LOGGER.warn("Packet '" + packetClassName + "' does not exist, cannot limit it! Please update paper.yml");
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ if (!(section.get(packetClassName.concat(".interval")) instanceof Number) || !(section.get(packetClassName.concat(".max-packet-rate")) instanceof Number)) {
|
|
+ throw new RuntimeException("Packet limit setting " + packetClassName + " is missing interval or max-packet-rate!");
|
|
+ }
|
|
+
|
|
+ final String actionString = section.getString(packetClassName.concat(".action"), "KICK");
|
|
+ PacketLimit.ViolateAction action = PacketLimit.ViolateAction.KICK;
|
|
+ for (PacketLimit.ViolateAction test : PacketLimit.ViolateAction.values()) {
|
|
+ if (actionString.equalsIgnoreCase(test.name())) {
|
|
+ action = test;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ final double interval = section.getDouble(packetClassName.concat(".interval"));
|
|
+ final double rate = section.getDouble(packetClassName.concat(".max-packet-rate"));
|
|
+
|
|
+ if (interval > 0.0 && rate > 0.0) {
|
|
+ packetSpecificLimits.put((Class)packetClazz, new PacketLimit(interval, rate, action));
|
|
+ }
|
|
+ }
|
|
+ }
|
|
}
|
|
diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
|
|
index 47eadb4a08953a45300d769518af22b1463f4d11..b27610cde8eaa7ff35c777039a0ca9d8eab748fe 100644
|
|
--- a/src/main/java/net/minecraft/network/Connection.java
|
|
+++ b/src/main/java/net/minecraft/network/Connection.java
|
|
@@ -136,6 +136,22 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
|
|
}
|
|
}
|
|
// Paper end - allow controlled flushing
|
|
+ // Paper start - packet limiter
|
|
+ protected final Object PACKET_LIMIT_LOCK = new Object();
|
|
+ protected final io.papermc.paper.util.IntervalledCounter allPacketCounts = com.destroystokyo.paper.PaperConfig.allPacketsLimit != null ? new io.papermc.paper.util.IntervalledCounter(
|
|
+ (long)(com.destroystokyo.paper.PaperConfig.allPacketsLimit.packetLimitInterval * 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(org.bukkit.craftbukkit.util.CraftChatMessage.fromString(com.destroystokyo.paper.PaperConfig.kickMessage, true)[0]), (future) -> {
|
|
+ this.disconnect(org.bukkit.craftbukkit.util.CraftChatMessage.fromString(com.destroystokyo.paper.PaperConfig.kickMessage, true)[0]);
|
|
+ });
|
|
+ this.setReadOnly();
|
|
+ this.stopReadingPackets = true;
|
|
+ }
|
|
+ // Paper end - packet limiter
|
|
|
|
public Connection(PacketFlow side) {
|
|
this.receiving = side;
|
|
@@ -216,6 +232,45 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
|
|
|
|
protected void channelRead0(ChannelHandlerContext channelhandlercontext, Packet<?> packet) {
|
|
if (this.channel.isOpen()) {
|
|
+ // Paper start - packet limiter
|
|
+ if (this.stopReadingPackets) {
|
|
+ return;
|
|
+ }
|
|
+ if (this.allPacketCounts != null ||
|
|
+ com.destroystokyo.paper.PaperConfig.packetSpecificLimits.containsKey(packet.getClass())) {
|
|
+ long time = System.nanoTime();
|
|
+ synchronized (PACKET_LIMIT_LOCK) {
|
|
+ if (this.allPacketCounts != null) {
|
|
+ this.allPacketCounts.updateAndAdd(1, time);
|
|
+ if (this.allPacketCounts.getRate() >= com.destroystokyo.paper.PaperConfig.allPacketsLimit.maxPacketRate) {
|
|
+ this.killForPacketSpam();
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ for (Class<?> check = packet.getClass(); check != Object.class; check = check.getSuperclass()) {
|
|
+ com.destroystokyo.paper.PaperConfig.PacketLimit packetSpecificLimit =
|
|
+ com.destroystokyo.paper.PaperConfig.packetSpecificLimits.get(check);
|
|
+ if (packetSpecificLimit == null) {
|
|
+ continue;
|
|
+ }
|
|
+ io.papermc.paper.util.IntervalledCounter counter = this.packetSpecificLimits.computeIfAbsent((Class)check, (clazz) -> {
|
|
+ return new io.papermc.paper.util.IntervalledCounter((long)(packetSpecificLimit.packetLimitInterval * 1.0e9));
|
|
+ });
|
|
+ counter.updateAndAdd(1, time);
|
|
+ if (counter.getRate() >= packetSpecificLimit.maxPacketRate) {
|
|
+ switch (packetSpecificLimit.violateAction) {
|
|
+ case DROP:
|
|
+ return;
|
|
+ case KICK:
|
|
+ this.killForPacketSpam();
|
|
+ return;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ // Paper end - packet limiter
|
|
try {
|
|
Connection.genericsFtw(packet, this.packetListener);
|
|
} catch (RunningOnDifferentThreadException cancelledpackethandleexception) {
|