61 lines
2.4 KiB
Diff
61 lines
2.4 KiB
Diff
From 0472f861774f4b595adfe6554d6418095218be90 Mon Sep 17 00:00:00 2001
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From: Benjamin James Harrison-Sims <tehrainbowguy@gmail.com>
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Date: Sun, 14 Apr 2013 21:19:57 +0500
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Subject: [PATCH] Prevent handshake spam from invalid names.
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diff --git a/src/main/java/net/minecraft/server/Packet2Handshake.java b/src/main/java/net/minecraft/server/Packet2Handshake.java
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index 343af93..aa6609b 100644
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--- a/src/main/java/net/minecraft/server/Packet2Handshake.java
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+++ b/src/main/java/net/minecraft/server/Packet2Handshake.java
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@@ -1,5 +1,7 @@
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package net.minecraft.server;
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+import org.bukkit.craftbukkit.Spigot;
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+
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import java.io.DataInputStream;
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import java.io.DataOutputStream;
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@@ -19,6 +21,7 @@ public class Packet2Handshake extends Packet {
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this.b = a(datainputstream, 16);
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this.c = a(datainputstream, 255);
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this.d = datainputstream.readInt();
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+ if(!Spigot.validName.matcher(this.b).matches()) throw new IOException("Invalid name!"); // Spigot
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}
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public void a(DataOutputStream dataoutputstream) throws IOException { // CraftBukkit - throws IOException
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diff --git a/src/main/java/org/bukkit/craftbukkit/Spigot.java b/src/main/java/org/bukkit/craftbukkit/Spigot.java
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index 7fafe01..2f4dcd9 100644
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--- a/src/main/java/org/bukkit/craftbukkit/Spigot.java
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+++ b/src/main/java/org/bukkit/craftbukkit/Spigot.java
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@@ -6,6 +6,7 @@ import java.net.InetAddress;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.logging.Level;
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+import java.util.regex.Pattern;
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import net.minecraft.server.AxisAlignedBB;
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import net.minecraft.server.Chunk;
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import net.minecraft.server.Entity;
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@@ -56,6 +57,7 @@ public class Spigot {
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private static Metrics metrics;
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public static List<String> bungeeIPs;
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public static int textureResolution = 16;
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+ public static final Pattern validName = Pattern.compile("^[a-zA-Z0-9_-]{2,16}$");
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public static void initialize(CraftServer server, SimpleCommandMap commandMap, YamlConfiguration configuration) {
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commandMap.register("bukkit", new org.bukkit.craftbukkit.command.TicksPerSecondCommand("tps"));
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@@ -380,7 +382,9 @@ public class Spigot {
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}
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/**
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- * Gets the range an entity should be 'tracked' by players and visible in the client.
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+ * Gets the range an entity should be 'tracked' by players and visible in
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+ * the client.
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+ *
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* @param entity
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* @param defaultRange Default range defined by Mojang
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* @return
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--
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1.8.2.1
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