From fb546789a1e7a9837f7766198a171d49cf2895b7 Mon Sep 17 00:00:00 2001
From: patrik <patrik@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Sat, 28 Jan 2012 21:34:11 +0000
Subject: [PATCH] Fixed bug that would make the script crash if no domain
 argument was specified.

---
 scripts/dns-srv-enum.nse | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/dns-srv-enum.nse b/scripts/dns-srv-enum.nse
index 1c6f081e1..d213a81b0 100644
--- a/scripts/dns-srv-enum.nse
+++ b/scripts/dns-srv-enum.nse
@@ -58,11 +58,11 @@ require 'dns'
 require 'tab'
 require 'target'
 
-prerule = function() return true end
-
 local arg_domain = stdnse.get_script_args(SCRIPT_NAME .. ".domain")
 local arg_filter = stdnse.get_script_args(SCRIPT_NAME .. ".filter")
 
+prerule = function() return not(not(arg_domain)) end
+
 local function parseSvcList(services)
 	local i = 1
 	return function()