Firewall using libpcap

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

           Is it possible to build a user space firewall using
libpcap library.
            libpcap takes a copy of packet and the orginal
packet and the orginal packet  continues its journey through 
the kernel protocol stack independent of libpcap processing.
           where as in case of firewall we require to intercept 
the orginal packet process it and then  submit it to protocol 
stack.
           but i have seen snort using libpcap capable of packet 
dropping packet . How is it possible.

     egarly waiting for the response.

  With warm regards,
    PAUL

-
This is the TCPDUMP workers list. It is archived at
http://www.tcpdump.org/lists/workers/index.html
To unsubscribe use mailto:tcpdump-workers-request () tcpdump org?body=unsubscribe