From 8a175d127d03e83f8c4c65f50c358daaa52b630d Mon Sep 17 00:00:00 2001
From: djalal <djalal@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Wed, 9 Nov 2011 12:39:01 +0000
Subject: [PATCH] o [NSE] added a debug message in the prerule to show that
 some arguments are missing.

---
 scripts/dns-brute.nse | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/scripts/dns-brute.nse b/scripts/dns-brute.nse
index 2c2314aaa..0afe1f99f 100644
--- a/scripts/dns-brute.nse
+++ b/scripts/dns-brute.nse
@@ -29,7 +29,13 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 categories = {"intrusive", "discovery"}
 
 prerule = function()
-	return stdnse.get_script_args("dns-brute.domain")
+    if not stdnse.get_script_args("dns-brute.domain") then
+      stdnse.print_debug(3,
+        "Skipping '%s' %s, 'dns-brute.domain' argument is missing.",
+        SCRIPT_NAME, SCRIPT_TYPE)
+      return false
+    end
+    return true
 end
 
 hostrule = function(host)