Re: [NSE] Getting a backtrace?

[Ron <ron () skullsecurity net>]

Patrick Donnelly wrote:
> On Fri, Oct 24, 2008 at 8:47 AM, Ron <ron () skullsecurity net> wrote:
>
> As of right now NSE does not print out a backtrace (it could easily if
> there is a general desire for this). You can get the information when
> debugging by hooking your action function (emphasis on "when
> debugging") like so:
>
> function action (host, port)
>  -- your script does stuff
> end
>
> -- ... other stuff in file
>
> local real_action = action;
>
> function action (...)
>   local t = {n = select("#", ...), ...};
>   local status, ret = xpcall(function() return real_action(unpack(t,
> 1, t.n)) end,
>       debug.traceback)
>   if not status then error(ret) end
>   return ret
> end
>
> Cheers,

So, I implemented that in one of my scripts, to see how it works, and I
am getting this error message:

SCRIPT ENGINE: ./scripts/smb-enumusers.nse:501: attempt to yield across
metamethod/C-call boundary
stack traceback:
        [C]: in function 'connect'
        [string "local yield, connect, socket_lock = ...;..."]:6: in
function 'connect'


It looks like it's getting an error inside the connect() function. Is
there a bug in the implementation of connect(), or is something else
going on here?


-- 
Ron Bowes
http://www.skullsecurity.org/
http://www.javaop.com/

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