Pcap to read packets received on a character device

[narender <dnarenderreddy () gmail com>]

Hi ,
I would like to know if its possible to know if its possible to read packets
from a linux character device using libpcap.
If yes, I would like to know how this can be achieved. I have an application
which writes packets to the character device
and these packets are to be read by another application, do some processing
and hand it back.

I was checkin the code in pcap-linux.c where we have hooks for DAG and
SEPTEL devices. Should it be done in the similar way.


Also I would like to know if I can set the filters in libpcap for this
character device so that I can ignore packets which are not of
any interest to me and avoid them from being copied to the user space.

Can I also make use of the ring buffer mechanism to avoid buffer copy. How
can this be done.


Regards
Narender
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