array limits

Hi,

just a small question, but how big could you make an array.
Will the 
performance drop significantly if you have a big array?
maybe something like "data[0] - data[3000]". I
want to know because I 
grab some large content from a file with a lot of lines and
split the 
lines up in an array.
My file is not that big, but others could be. I did this
because I want 
to use it in a report, but only for about the first 20
lines, or are 
there other ways to do this.

Thanks,

Ferdy
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Hi Ferdy,

I don't have an exact value at hand, but NASL scripts are
memory- 
contrained and can not allocate more than 80 megs of ram
(total) or  
40 megs in a row.

It might be big enough for your needs, but then again you
probably  
want to do something else than an array.


				-- Renaud

On May 19, 2007, at 7:56 PM, Ferdy Riphagen wrote:

> Hi,
>
> just a small question, but how big could you make an
array. Will  
> the performance drop significantly if you have a big
array?
> maybe something like "data[0] - data[3000]".
I want to know because  
> I grab some large content from a file with a lot of
lines and split  
> the lines up in an array.
> My file is not that big, but others could be. I did
this because I  
> want to use it in a report, but only for about the
first 20 lines,  
> or are there other ways to do this.
>
> Thanks,
>
> Ferdy
> _______________________________________________
> Plugins-writers mailing list
> Plugins-writerslist.nessus.org
> http://mail.nessus.org/mailman/listinfo/plugins-writers
>

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Renaud Deraison wrote:
>
>
> Hi Ferdy,
>
> I don't have an exact value at hand, but NASL scripts
are 
> memory-contrained and can not allocate more than 80
megs of ram 
> (total) or 40 megs in a row.
>
> It might be big enough for your needs, but then again
you probably 
> want to do something else than an array.
>
Hi Renaud, thanks but I don't now how to do it other than
with the split 
function.
The script is grabbing a file from a FTP server, and than I
split to 
report the first 20 lines (as a prove)
Here is a part of the config, it's grabbing the config-file
from an 
Cisco IOS router via it's vulnerable FTP server, although 
ftp_anonymous.nasl could detect it too.
Maybe an array of 3000 was a bit overwhelmed, it could be
less lines.

if (strlen(recv_config)) {
	# Only report a few lines, configs could be very big.
	# Change n <= 20 in a larger number if you would like to
see more. 
	lines = (split(recv_config));
	config = "";
	for(n = 0; n <= 20; n++) config += lines[n]; 

	report = string(
		desc,  "rnrn",
	        "Plugin output :rnrn",
		"Partial startup-config file:rn",
	        config);




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Ferdy Riphagen wrote:
> Renaud Deraison wrote:
>>
>>
>> Hi Ferdy,
>>
>> I don't have an exact value at hand, but NASL
scripts are 
>> memory-contrained and can not allocate more than 80
megs of ram 
>> (total) or 40 megs in a row.
>>
>> It might be big enough for your needs, but then
again you probably 
>> want to do something else than an array.
>>
> Hi Renaud, thanks but I don't now how to do it other
than with the 
> split function.
> The script is grabbing a file from a FTP server, and
than I split to 
> report the first 20 lines (as a prove)
> Here is a part of the config, it's grabbing the
config-file from an 
> Cisco IOS router via it's vulnerable FTP server,
although 
> ftp_anonymous.nasl could detect it too.
found it ftp_recv_data(socket:soc2, line:500); not totally
correct, but 
retrieving the config in total is not needed anymore, and it
speed up 
things.

--Ferdy--

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