papermc/Spigot-API-Patches/0043-IllegalPacketEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 4 Dec 2016 01:19:14 -0500
Subject: [PATCH] IllegalPacketEvent

Fire an event when an illegal packet is received to let plugins handle it

Lets plugins change the kick message and if it should kick or not.

diff --git a/src/main/java/com/destroystokyo/paper/event/player/IllegalPacketEvent.java b/src/main/java/com/destroystokyo/paper/event/player/IllegalPacketEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..37a17f0bb2b9028cf0d3d320f5528fcb950f0d2c
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/player/IllegalPacketEvent.java
@@ -0,0 +1,70 @@
+package com.destroystokyo.paper.event.player;
+
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class IllegalPacketEvent extends PlayerEvent {
+    @Nullable private final String type;
+    @Nullable private final String ex;
+    @Nullable private String kickMessage;
+    private boolean shouldKick = true;
+
+    public IllegalPacketEvent(@NotNull Player player, @Nullable String type, @Nullable String kickMessage, @NotNull Exception e) {
+        super(player);
+        this.type = type;
+        this.kickMessage = kickMessage;
+        this.ex = e.getMessage();
+    }
+
+    public boolean isShouldKick() {
+        return shouldKick;
+    }
+
+    public void setShouldKick(boolean shouldKick) {
+        this.shouldKick = shouldKick;
+    }
+
+    @Nullable
+    public String getKickMessage() {
+        return kickMessage;
+    }
+
+    public void setKickMessage(@Nullable String kickMessage) {
+        this.kickMessage = kickMessage;
+    }
+
+    @Nullable
+    public String getType() {
+        return type;
+    }
+
+    @Nullable
+    public String getExceptionMessage() {
+        return ex;
+    }
+
+    private static final HandlerList handlers = new HandlerList();
+
+    @NotNull
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    public static void process(@NotNull Player player, @Nullable String type, @Nullable String kickMessage, @NotNull Exception exception) {
+        IllegalPacketEvent event = new IllegalPacketEvent(player, type, kickMessage, exception);
+        event.callEvent();
+        if (event.shouldKick) {
+            player.kickPlayer(kickMessage);
+        }
+        Bukkit.getLogger().severe(player.getName() + "/" + type + ": " + exception.getMessage());
+    }
+}