Re: manufacturer information for address-info.nse

[Djalal Harouni <tixxdz () opendz org>]

On Sat, Sep 24, 2011 at 11:16:23PM +0400, Vasiliy Kulikov wrote:
> On Sat, Sep 24, 2011 at 09:21 -0700, David Fifield wrote:
> > On Sat, Sep 24, 2011 at 05:00:10PM +0400, Vasiliy Kulikov wrote:
> > > FWIW, while this is not a big deal for this specific usage, but there is
> > > a race condition as nmap.registry is a global variable.  If two parallel
> > > invocations of the script simultaneously test nmap.registry.mac they
> > > both recalc and set mac.prefixes variable.  For this usage it's harmless
> > > as Lua has a garbage collector and recalc doesn't do anything significant.
> >
> > No, that's not how parallelism works in NSE. See
> > http://www.lua.org/manual/5.1/manual.html#2.11. It's not possible for
> > two scripts to access this value simultaneously because only one script
> > runs at a time.
>
> Ah, so all NSE scripts are run as coroutines, which run not in parallel
> unless yield is called, even if run against different target hosts?  I
> didn't know that, thank you for the information!
You can find the list of the functions that will yield here:
http://seclists.org/nmap-dev/2011/q3/534

-- 
tixxdz
http://opendz.org
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