Firewall using libpcap ??

[Biswajit Paul <biswajit () cair res in>]

hi ,

      i am trying to develop firewall using libpcap 
in user space.

       whenever packet comes to ethernet layer before
passing the packet to kernel protocol stack libpcap
takes a COPY of the packet.

       so is it possible to develop a userspace firewall
using libpcap where i require to intercept the packet and
process it before giving it to kernel protocol stack.


   looking for ur help.

With Regards

      Biswajit  

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