On Tue, Oct 16, 2001 at 09:22:10PM -0700, Jitendra Sankpal wrote:
> We know that libpcap uses BPF for packet filtering.

Only on BSD.  It uses other mechanisms on other OSes.

> Can we use/change the code of BPF so as to use libpcap
> & bpf for packet filtering FIREWALL.

No, that wouldn't be sufficient.  As per my previous mail, libpcap has
no mechanism for writing packets; you'd have to add that as well.

Most if not all of the BSDs that have BPF also have their own packet
filtering mechanism, I think, which could be used to implement a
firewall.
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