Re: [NSE] modbus-enum.nse, modbus discovery script

[David Fifield <david () bamsoftware com>]

On Fri, Dec 17, 2010 at 12:01:02PM -0600, Bob Radvanovsky wrote:
> P.S.  I am hoping to develop a common development framework criteria
> for the NMAP NSE scripting language specifically for SCADA and
> industrial automation devices, and wanted some feedback from you two
> (Alexendar and David for starters) about what would be the best method
> for developing enumeration and validation scripts in which you have
> common methods of determining such devices?  I'm open to any
> suggestions...thanks!  ;)

It sounds like you want to create a library, perhaps scada.lua or
modbus.lua. The best way to start is by copying the structure of an
existing library.

http://nmap.org/book/nse-library.html

Libraries get more review, because it's harder to change them down the
line. My advice is if you have a function and you're not sure the
interface to it is really solid, just put it in a script as a local
function, where it can be copied to a library later when needed. That's
better than spending weeks and weeks getting a library "perfect."

David Fifield
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