var PKT_TIMEOUT in sfdaq.c

["Guillaume Daleux" <guillaume.daleux () abovesecurity com>]

Hi all,

 

We had some problems with snort and snort daq which use 100% of processing power. After debugging, we saw that our 
system had a lot of call to poll function.

 

The function poll (call in daq) set with a default snort parameter (PKT_TIMEOUT = 1000) is called everytime and didn't 
respect this timeout of 1 second (maybe heisenbug because only one printf removed this problem).

 

We want to ask you, why this parameter is set to 1000 ms and not -1 ? The poll function is called to wait packets so 
why the snort daq uses a timeout and not directly value -1 which would block until a packet arrive ?

 

Can we patch snort and change PKT_TIMEOUT to -1 ?

 

 

Thanks for your answer.

 

 

Guillaume DALEUX

 

tel : 450.430.8166 x2279 | guillaume.daleux () abovesecurity com 

sans frais / toll free : 1.866.430.8166 | fax: 450.430.1858

 

Managed Security Services ∙ Information Risk Management

Surveillance ∙ Gestion Des Risques Informationnels
203 - 1919 boul. Lionel-Bertrand ∙ Boisbriand ∙ QC ∙ Canada ∙ J7H 1N8

www.abovesecurite.com <http://www.abovesecurite.com/>

------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing 
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/

_______________________________________________
Snort-devel mailing list
Snort-devel () lists sourceforge net
https://lists.sourceforge.net/lists/listinfo/snort-devel

Please visit http://blog.snort.org for the latest news about Snort!