From 5be0ac591bf350f4c2d6d6d8b271ab62beed26e3 Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Mon, 23 May 2016 04:30:05 +0000
Subject: [PATCH] Avoid a crash when host has no domain configured

---
 scripts/broadcast-wpad-discover.nse | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/broadcast-wpad-discover.nse b/scripts/broadcast-wpad-discover.nse
index 6f049989a..8d781204c 100644
--- a/scripts/broadcast-wpad-discover.nse
+++ b/scripts/broadcast-wpad-discover.nse
@@ -151,7 +151,10 @@ local function dnsDiscover()
           -- first get all unique domain names
           if ( not(name:match("in%-addr.arpa$")) ) then
             local domain = name:match("^[^%.]-%.(.*)$")
-            domains[domain] = true
+            -- Check that the name has a domain component
+            if domain then
+              domains[domain] = true
+            end
           end
         end