What are the chances of Phil Wood's patches getting ported?
If you mean the patches from
http://public.lanl.gov/cpw/
then the chances are no greater than the chances of memory mapping being added to BPF. :-)
I.e., the patches support use of Linux's memory-mapped PF_PACKET socket support; there's no equivalent memory-mapped BPF mechanism in any BSD, so there'd be nothing for a ported version to use - a memory-mapped BPF would have to be implemented before his changes could be ported.
Michael T. Stolarchuk was working on such a mechanism at one point:
http://www.tcpdump.org/lists/workers/2000/msg01156.html
but I don't know what happened to that. (He was working on it for OpenBSD, I think, and was, I think, relying on UVM:
http://www.ccrc.wustl.edu/pub/chuck/tech/uvm/
for it:
http://www.usenix.org/events/lisa2001/tech/stolarchuk/
.)
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