ring buffer in freebsd (for bpf sniffing)

[John]

I've been talking with Luca Deri about a paper he wrote (
http://luca.ntop.org/Ring.pdf). In it he says he plans to port
this to FreeBSD. I was just wondering if anyone has looked this 
his work. I'd help him but seeing as this is way over my perl skills
head i though i would post over here about it. 

The code is over here.

http://prdownloads.sourceforge.net/ntop/ring-1.0.tar.gz?download

If you haven't read the paper you should. It shows how much polling
helps bpf capturing on FreeBSD, and compares this with linux.
The patches add code to bpf and nic drivers from the looks of it.