Re: How to use "pcap" on a router ???

[Ury Segal <ury_segal () yahoo com>]

Hi!

I'd prefer calling "pcap_open_live()" twice,
set the appropriate filters (which may be
different), call "get_selectable_fd()" on each 
pcap_t, and then use select() to pick up packets 
from any interface that may have some ready. That

way I don't have to deal with threads.

However on some situations you'd have to use 
threads. For example, if you have a lot of 
processing done per-packet and you want to take
advantage of a multi-CPU machine.

--- kashif <kashifj () gmail com> wrote:

> Dear,
>
> I have configured my PC running RedHat Linux
> 9.0 into a router by
> turning on the ip_forwarding facility of it. It
> got TWO LAN cards...and if i
> run two instances of *pcap* one for each LAN
> card for capturing
> packets, it works fine....But i intend writing
> an application wherein
> i need the
> information captured by both the instances..I
> mean if i want to
> capture packets from both the LAN cards
> simultaneously in one
> application..should i use threading to
> accomplish this?...Any
> suggestion...
>
> Regards,
> kj
> -
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--ury
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