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https://github.com/PaperMC/Paper.git
synchronisiert 2024-12-16 11:30:06 +01:00
1358d1e914
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: 881e06e5 PR-725: Add Item Unlimited Lifetime APIs CraftBukkit Changes: 74c08312 SPIGOT-6962: Call EntityChangeBlockEvent when when FallingBlockEntity starts to fall 64db5126 SPIGOT-6959: Make /loot command ignore empty items for spawn 2d760831 Increase outdated build delay 9ed7e4fb SPIGOT-6138, SPIGOT-6415: Don't call CreatureSpawnEvent after cross-dimensional travel fc4ad813 SPIGOT-6895: Trees grown with applyBoneMeal() don't fire the StructureGrowthEvent 59733a2e SPIGOT-6961: Actually return a copy of the ItemMeta Spigot Changes: ffceeae3 SPIGOT-6956: Drop unload queue patch as attempt at fixing stop issue e19ddabd PR-1011: Add Item Unlimited Lifetime APIs 34d40b0e SPIGOT-2942: give command fires PlayerDropItemEvent, cancelling it causes Item Duplication
206 Zeilen
10 KiB
Diff
206 Zeilen
10 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <spottedleaf@spottedleaf.dev>
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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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PacketPlayInAutoRecipe:
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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/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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index 3d1319af2dbade4234025793303333cb95d9c019..cd601be6604fd81be8d58f6a46d39008fa8ecc20 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
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@@ -521,4 +521,102 @@ public class PaperConfig {
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itemValidationBookAuthorLength = getInt("settings.item-validation.book.author", itemValidationBookAuthorLength);
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itemValidationBookPageLength = getInt("settings.item-validation.book.page", itemValidationBookPageLength);
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}
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+
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+ public static final class PacketLimit {
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+ public final double packetLimitInterval;
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+ public final double maxPacketRate;
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+ public final ViolateAction violateAction;
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+
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+ public PacketLimit(final double packetLimitInterval, final double maxPacketRate, final ViolateAction violateAction) {
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+ this.packetLimitInterval = packetLimitInterval;
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+ this.maxPacketRate = maxPacketRate;
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+ this.violateAction = violateAction;
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+ }
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+
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+ public static enum ViolateAction {
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+ KICK, DROP;
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+ }
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+ }
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+
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+ public static String kickMessage;
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+ public static PacketLimit allPacketsLimit;
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+ public static java.util.Map<Class<? extends net.minecraft.network.protocol.Packet<?>>, PacketLimit> packetSpecificLimits = new java.util.HashMap<>();
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+
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+ private static void packetLimiter() {
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+ packetSpecificLimits.clear();
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+ kickMessage = org.bukkit.ChatColor.translateAlternateColorCodes('&', getString("settings.packet-limiter.kick-message", "&cSent too many packets"));
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+ allPacketsLimit = new PacketLimit(
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+ getDouble("settings.packet-limiter.limits.all.interval", 7.0),
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+ getDouble("settings.packet-limiter.limits.all.max-packet-rate", 500.0),
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+ PacketLimit.ViolateAction.KICK
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+ );
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+ if (allPacketsLimit.maxPacketRate <= 0.0 || allPacketsLimit.packetLimitInterval <= 0.0) {
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+ allPacketsLimit = null;
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+ }
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+ final ConfigurationSection section = config.getConfigurationSection("settings.packet-limiter.limits");
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+
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+ // add default packets
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+
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+ // auto recipe limiting
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+ getDouble("settings.packet-limiter.limits." +
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+ "PacketPlayInAutoRecipe" + ".interval", 4.0);
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+ getDouble("settings.packet-limiter.limits." +
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+ "PacketPlayInAutoRecipe" + ".max-packet-rate", 5.0);
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+ getString("settings.packet-limiter.limits." +
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+ "PacketPlayInAutoRecipe" + ".action", PacketLimit.ViolateAction.DROP.name());
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+
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+ final Map<String, String> mojangToSpigot = new HashMap<>();
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+ final Map<String, io.papermc.paper.util.ObfHelper.ClassMapping> maps = io.papermc.paper.util.ObfHelper.INSTANCE.mappingsByObfName();
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+ if (maps != null) {
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+ maps.forEach((spigotName, classMapping) ->
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+ mojangToSpigot.put(classMapping.mojangName(), classMapping.obfName()));
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+ }
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+
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+ for (final String packetClassName : section.getKeys(false)) {
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+ if (packetClassName.equals("all")) {
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+ continue;
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+ }
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+ Class<?> packetClazz = null;
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+
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+ for (final String subpackage : List.of("game", "handshake", "login", "status")) {
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+ final String fullName = "net.minecraft.network.protocol." + subpackage + "." + packetClassName;
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+ try {
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+ packetClazz = Class.forName(fullName);
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+ break;
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+ } catch (final ClassNotFoundException ex) {
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+ try {
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+ final String spigot = mojangToSpigot.get(fullName);
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+ if (spigot != null) {
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+ packetClazz = Class.forName(spigot);
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+ }
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+ } catch (final ClassNotFoundException ignore) {}
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+ }
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+ }
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+
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+ if (packetClazz == null || !net.minecraft.network.protocol.Packet.class.isAssignableFrom(packetClazz)) {
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+ MinecraftServer.LOGGER.warn("Packet '" + packetClassName + "' does not exist, cannot limit it! Please update paper.yml");
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+ continue;
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+ }
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+
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+ if (!(section.get(packetClassName.concat(".interval")) instanceof Number) || !(section.get(packetClassName.concat(".max-packet-rate")) instanceof Number)) {
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+ throw new RuntimeException("Packet limit setting " + packetClassName + " is missing interval or max-packet-rate!");
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+ }
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+
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+ final String actionString = section.getString(packetClassName.concat(".action"), "KICK");
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+ PacketLimit.ViolateAction action = PacketLimit.ViolateAction.KICK;
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+ for (PacketLimit.ViolateAction test : PacketLimit.ViolateAction.values()) {
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+ if (actionString.equalsIgnoreCase(test.name())) {
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+ action = test;
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+ break;
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+ }
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+ }
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+
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+ final double interval = section.getDouble(packetClassName.concat(".interval"));
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+ final double rate = section.getDouble(packetClassName.concat(".max-packet-rate"));
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+
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+ if (interval > 0.0 && rate > 0.0) {
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+ packetSpecificLimits.put((Class)packetClazz, new PacketLimit(interval, rate, action));
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+ }
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+ }
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+ }
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}
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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 47eadb4a08953a45300d769518af22b1463f4d11..b27610cde8eaa7ff35c777039a0ca9d8eab748fe 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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@@ -136,6 +136,22 @@ 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 io.papermc.paper.util.IntervalledCounter allPacketCounts = com.destroystokyo.paper.PaperConfig.allPacketsLimit != null ? new io.papermc.paper.util.IntervalledCounter(
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+ (long)(com.destroystokyo.paper.PaperConfig.allPacketsLimit.packetLimitInterval * 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(org.bukkit.craftbukkit.util.CraftChatMessage.fromString(com.destroystokyo.paper.PaperConfig.kickMessage, true)[0]), (future) -> {
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+ this.disconnect(org.bukkit.craftbukkit.util.CraftChatMessage.fromString(com.destroystokyo.paper.PaperConfig.kickMessage, true)[0]);
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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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@@ -216,6 +232,45 @@ 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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+ com.destroystokyo.paper.PaperConfig.packetSpecificLimits.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() >= com.destroystokyo.paper.PaperConfig.allPacketsLimit.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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+ com.destroystokyo.paper.PaperConfig.PacketLimit packetSpecificLimit =
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+ com.destroystokyo.paper.PaperConfig.packetSpecificLimits.get(check);
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+ if (packetSpecificLimit == null) {
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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.packetLimitInterval * 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.violateAction) {
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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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