Date: Thu, 11 Dec 2003 18:54:36 -0800 From: Guy Harris <guy@alum.mit.edu> To: Michael Sierchio <kudzu@tenebras.com> Cc: consume-thenet@lists.consume.net Subject: Re: ANNOUNCE: net/tcpdump Radiotap-aware port committed. Message-ID: <85615588-2C4E-11D8-8759-000A958097E4@alum.mit.edu>
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> 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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