Home page logo
/

nmap-dev logo Nmap Development mailing list archives

Re: [NSE] Draft - targets-sniffer.nse
From: Djalal Harouni <tixxdz () opendz org>
Date: Sun, 3 Apr 2011 16:37:26 +0100

On 2011-04-03 13:32:21 +0100, Nick Nikolaou wrote:
I also noticed that when the script captures a large number of IPs
(thousands - I tested this while on a Skype video call) it  won't add the
targets with target.add(unpack(sniffed_targets)) :

NSE: targets-sniffer threw an error!
./targets-sniffer.nse:109: too many results to unpack
stack traceback:
[C]: in function 'unpack'
 ./targets-sniffer.nse:109: in function <./targets-sniffer.nse:51>
(tail call): ?
Yes, you are adding lot of targets in a one call, actually there is a 
check inside Lua 'LUAI_MAXCSTACK == 8000' to avoid consuming the stack,
and there is also another _global_ special argument 'max-newtargets',
wich can be used to limit the number of added targets to avoid memory
starvation, however this last one is subject of debate. I think an
argument like this can have its use case in this targets-sniffer script.
(remember 'max-newtargets' is a global one: for all the scripts).


We may have to change this back to the old method of adding one address at a
time. That would also make output of IP address easier since we could check
for duplicates before printing the addresses.

The script doesn't output the IP address for now (except with -d) but I'll
add that functionality once we decide how I should go about adding addresses
to newtargets.
Yes we must change it, and since the script can add lot of targets, and
since the pcap_receive() will yield, we can consider Lua coroutines [1].


[1] http://nmap.org/book/nse-parallelism.html

_______________________________________________
Sent through the nmap-dev mailing list
http://cgi.insecure.org/mailman/listinfo/nmap-dev
Archived at http://seclists.org/nmap-dev/


-- 
tixxdz
http://opendz.org
_______________________________________________
Sent through the nmap-dev mailing list
http://cgi.insecure.org/mailman/listinfo/nmap-dev
Archived at http://seclists.org/nmap-dev/


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]
AlienVault