From 0461b74b2286f77b5ebcd48d8cccb7ddcf2a3395 Mon Sep 17 00:00:00 2001
From: Laurence Jones <laurence.jones@live.co.uk>
Date: Tue, 7 Nov 2023 08:39:25 +0000
Subject: [PATCH] Add a nil check to the parse ip function (#50)

---
 lib/crowdsec.lua | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/crowdsec.lua b/lib/crowdsec.lua
index 644f8ca..4d37c42 100644
--- a/lib/crowdsec.lua
+++ b/lib/crowdsec.lua
@@ -151,6 +151,9 @@ local function item_to_string(item, scope)
   end
 
   local ip_network_address, is_ipv4 = iputils.parseIPAddress(ip)
+  if ip_network_address == nil then
+    return nil
+  end 
   if is_ipv4 then
     ip_version = "ipv4"
     if cidr == nil then
@@ -393,6 +396,9 @@ function csmod.allowIp(ip)
   csmod.SetupStream()
 
   local key = item_to_string(ip, "ip")
+  if key == nil then
+    return true, nil, "Check failed '" .. ip .. "' has no valid IP address"
+  end
   local key_parts = {}
   for i in key.gmatch(key, "([^_]+)") do
     table.insert(key_parts, i)