local bin = require "bin"
local ipOps = require "ipOps"
local srvloc = require "srvloc"
local stdnse = require "stdnse"
local table = require "table"

description = [[
Attempts to use the Service Location Protocol to discover Novell NetWare Core Protocol (NCP) servers.
]]

---
--
--@output
-- Pre-scan script results:
-- | broadcast-novell-locate: 
-- |   Tree name: CQURE-LABTREE
-- |   Server name: linux-l84t
-- |   Addresses
-- |_    192.168.56.33
--
--

-- Version 0.1
-- Created 04/26/2011 - v0.1 - created by Patrik Karlsson

author = "Patrik Karlsson"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"broadcast", "safe"}


prerule = function() return true end

function action()

	local helper = srvloc.Helper:new()
	
	local status, bindery = helper:ServiceRequest("bindery.novell", "DEFAULT")
	if ( not(status) or not(bindery) ) then
		helper:close()
		return
	end
	bindery = bindery[1]
	local srvname = bindery:match("%/%/%/(.*)$")
	
	local status, attrib = helper:AttributeRequest(bindery, "DEFAULT", "svcaddr-ws")
	helper:close()
	attrib = attrib:match("^%(svcaddr%-ws=(.*)%)$")
	if ( not(attrib) ) then return end

	local attribs = stdnse.strsplit(",", attrib)
	if ( not(attribs) ) then return end

	local addrs = { name = "Addresses"}
	local ips = {}
	for _, attr in ipairs(attribs) do
		local addr = attr:match("^%d*%-%d*%-%d*%-(........)")
		if ( addr ) then
			local pos, dw_addr = bin.unpack( "<I", bin.pack("H", addr) )
			local ip = ipOps.fromdword(dw_addr)
			
			if ( not(ips[ip]) ) then
				table.insert(addrs, ip)
				ips[ip] = ip
			end
		end
	end

	local output = {}
	local status, treename = helper:ServiceRequest("ndap.novell", "DEFAULT")
	if ( status ) then 
		treename = treename[1]
		treename = treename:match("%/%/%/(.*)%.$")
		table.insert(output, ("Tree name: %s"):format(treename))
	end
	table.insert(output, ("Server name: %s"):format(srvname))
	table.insert(output, addrs)
		
	return stdnse.format_output(true, output)
end
