o [NSE] Added the scripts rtsp-url-brute, rtsp-methods and the supporting rtsp

library. The scripts check the supported RTSP methods and attempt to brute
  force valid RTSP urls. [Patrik]

scripts/rtsp-methods.nse

@@ -0,0 +1,47 @@
+description = [[
+Finds out what methods are supported by the RTSP server.
+]]
+
+---
+-- @usage
+-- nmap -p 554 --script rtsp-methods <ip>
+--
+-- @output
+-- PORT    STATE SERVICE
+-- 554/tcp open  rtsp
+-- | rtsp-methods: 
+-- |_  DESCRIBE, SETUP, PLAY, TEARDOWN, OPTIONS
+--
+-- @args rtsp-methods.path the path to query, defaults to "*" which queries
+--       the server itself, rather than a specific url.
+--
+
+--
+-- Version 0.1
+-- Created 23/10/2011 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
+--
+author = "Patrik Karlsson <patrik@cqure.net>"
+license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
+categories = {"default", "safe"}
+
+require 'rtsp'
+require 'shortport'
+
+portrule = shortport.port_or_service(554, "rtsp", "tcp", "open")
+
+action = function(host, port)
+	local path = stdnse.get_script_args('rtsp-methods.path') or '*'
+	local helper = rtsp.Helper:new(host, port)
+	local status = helper:connect()
+	if ( not(status) ) then
+		stdnse.print_debug(2, "ERROR: Failed to connect to RTSP server")
+		return
+	end
+
+	local response
+	status, response = helper:options(path)
+	helper:close()
+	if ( status ) then
+		return stdnse.format_output(true, response.headers['Public'])
+	end
+end