Paper/Spigot-Server-Patches/0071-Add-velocity-warnings.patch

From d6c51d8cff479bbb46e78b7dd5808e7a5c59d2b1 Mon Sep 17 00:00:00 2001
From: Joseph Hirschfeld <joe@ibj.io>
Date: Thu, 3 Mar 2016 02:48:12 -0600
Subject: [PATCH] Add velocity warnings


diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
index f61f6cd..5934be1 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -204,6 +204,12 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
     }
 
     public void setVelocity(Vector vel) {
+        // Paper start - Warn server owners when plugins try to set super high velocities
+        if (!(this instanceof org.bukkit.entity.Projectile) && (vel.getX() > 4 || vel.getX() < -4 || vel.getY() > 4 || vel.getY() < -4 || vel.getZ() > 4 || vel.getZ() < -4)) {
+            getServer().getLogger().warning("Excessive velocity set detected: tried to set velocity of entity #" + getEntityId() + " to (" + vel.getX() + "," + vel.getY() + "," + vel.getZ() + ").");
+            Thread.dumpStack();
+        }
+        // Paper end
         entity.motX = vel.getX();
         entity.motY = vel.getY();
         entity.motZ = vel.getZ();
-- 
2.8.0