From 54aa49bd3dccd1b9b209cbd4f81b08208d586b3a Mon Sep 17 00:00:00 2001 From: Benjamin James Harrison-Sims Date: Sun, 14 Apr 2013 21:19:57 +0500 Subject: [PATCH] Prevent handshake spam from invalid names. diff --git a/src/main/java/net/minecraft/server/Packet2Handshake.java b/src/main/java/net/minecraft/server/Packet2Handshake.java index 343af93..aa6609b 100644 --- a/src/main/java/net/minecraft/server/Packet2Handshake.java +++ b/src/main/java/net/minecraft/server/Packet2Handshake.java @@ -1,5 +1,7 @@ package net.minecraft.server; +import org.bukkit.craftbukkit.Spigot; + import java.io.DataInputStream; import java.io.DataOutputStream; @@ -19,6 +21,7 @@ public class Packet2Handshake extends Packet { this.b = a(datainputstream, 16); this.c = a(datainputstream, 255); this.d = datainputstream.readInt(); + if(!Spigot.validName.matcher(this.b).matches()) throw new IOException("Invalid name!"); // Spigot } public void a(DataOutputStream dataoutputstream) throws IOException { // CraftBukkit - throws IOException diff --git a/src/main/java/org/bukkit/craftbukkit/Spigot.java b/src/main/java/org/bukkit/craftbukkit/Spigot.java index 490553b..1f61d23 100644 --- a/src/main/java/org/bukkit/craftbukkit/Spigot.java +++ b/src/main/java/org/bukkit/craftbukkit/Spigot.java @@ -6,6 +6,7 @@ import java.net.InetAddress; import java.util.ArrayList; import java.util.List; import java.util.logging.Level; +import java.util.regex.Pattern; import net.minecraft.server.AxisAlignedBB; import net.minecraft.server.Chunk; import net.minecraft.server.Entity; @@ -16,12 +17,17 @@ import net.minecraft.server.EntityComplexPart; import net.minecraft.server.EntityCreature; import net.minecraft.server.EntityEnderCrystal; import net.minecraft.server.EntityEnderDragon; +import net.minecraft.server.EntityExperienceOrb; import net.minecraft.server.EntityFireball; import net.minecraft.server.EntityFireworks; +import net.minecraft.server.EntityGhast; import net.minecraft.server.EntityHuman; +import net.minecraft.server.EntityItem; import net.minecraft.server.EntityItemFrame; import net.minecraft.server.EntityLiving; import net.minecraft.server.EntityMonster; +import net.minecraft.server.EntityPainting; +import net.minecraft.server.EntityPlayer; import net.minecraft.server.EntityProjectile; import net.minecraft.server.EntitySheep; import net.minecraft.server.EntitySlime; @@ -30,6 +36,7 @@ import net.minecraft.server.EntityWeather; import net.minecraft.server.EntityWither; import net.minecraft.server.MathHelper; import net.minecraft.server.MinecraftServer; +import net.minecraft.server.Packet255KickDisconnect; import net.minecraft.server.PendingConnection; import net.minecraft.server.World; import org.bukkit.Bukkit; @@ -50,6 +57,7 @@ public class Spigot { private static Metrics metrics; public static List bungeeIPs; public static int textureResolution = 16; + public static final Pattern validName = Pattern.compile("^[a-zA-Z0-9_-]{2,16}$"); public static void initialize(CraftServer server, SimpleCommandMap commandMap, YamlConfiguration configuration) { commandMap.register("bukkit", new org.bukkit.craftbukkit.command.TicksPerSecondCommand("tps")); @@ -376,7 +384,9 @@ public class Spigot { } /** - * Gets the range an entity should be 'tracked' by players and visible in the client. + * Gets the range an entity should be 'tracked' by players and visible in + * the client. + * * @param entity * @param defaultRange Default range defined by Mojang * @return -- 1.8.2.1