From 3dcfa8b32498a11d1cc8566a15f404faf3c87365 Mon Sep 17 00:00:00 2001
From: Nils Dagsson Moskopp <nils@dieweltistgarnichtso.net>
Date: Thu, 26 Aug 2021 01:32:51 +0200
Subject: [PATCH] Allow only meshnode glue in controller inventory

If a meshnode controller was trying to make sense of metadata from an
item other than meshnode glue, the server would crash. To prevent this,
only meshnode glue is allowed to be in a meshnode controller inventory.
---
 init.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/init.lua b/init.lua
index 1fcb337..90d8410 100644
--- a/init.lua
+++ b/init.lua
@@ -356,6 +356,9 @@ minetest.register_node("meshnode:controller", {
 		show_meshnode_formspec(pos, clicker)
 	end,
 	allow_metadata_inventory_put = function(pos, listname, index, stack, player)
+		if stack:get_name() ~= "meshnode:glue" then
+			return 0
+		end
 		local meta = stack:get_metadata()
 		if meta then
 			if vector.equals(minetest.string_to_pos(meta), pos) then