Re: Netfilter based application : any advice ?

["Saber zrelli" <saber_z@fastmail.fm>]

hi ,
so if i well understood  ; 
Netfilter doesn't offer packet injection , and i have to use libnet .
then , the other point :
I would like to capture in link level , 
Netfilter can aceess MAC adresses and other Ethernet parameters cause it
support it ,
but if for example i'm using wireless network and want to filter wireless
packets , does ethernet offer 802.11 specific methods , or is there a
standard link layer methods that supports all kind of protocols ?

thanks for clarifications.



On Mon, 15 Mar 2004 09:51:05 +0100, "Pablo Neira" <pablo@eurodev.net>
said:
> Hi,
> 
> Saber zrelli wrote:
> 
> >- Is it possible to send packets with Netfilter or not? ( if not i guess
> >using libnet will resolve the pb but better to have  
> >  every thing based on the same infrastructure)
> >  
> >
> 
> If you can do that in user space, have a look at libnet.You can forge
> packets in inject them.
> 
> 
> >- I would like to have the tool work with wireless protocol , does
> >Netfilter support non Ethernet proto and 802.11 particulary?
> >  
> >
> 
> This is transparent to netfilter since it's in OSI layer 3/4.
> 
> regards,
> Pablo
> 
-- 
  Saber Zrelli
  kanazawa university international house 
  kakuma-machi , kanazawa , Ishikawa 
  920-1192 Japan.