Date: Wed, 11 Dec 1996 00:45:37 -0800 (PST) From: batie@agora.rdrop.com (Alan Batie) To: msmith@atrad.adelaide.edu.au (Michael Smith) Cc: softweyr@xmission.com, msmith@atrad.adelaide.edu.au, security@freebsd.org Subject: Re: Risk of having bpf0? (was URGENT: Packet sniffer found on my system) Message-ID: <m0vXkIL-0008vkC@agora.rdrop.com> In-Reply-To: <199612110634.RAA22676@genesis.atrad.adelaide.edu.au> from "Michael Smith" at Dec 11, 96 05:04:36 pm
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> Tcpdump does all this and lots more; the filter language is pretty powerful. Given that bpf implements a little software processor, you could probably demonstrate its equivalence to a turing machine. I'm not sure if the lack of back referencing jumps inhibits this or not, but I don't think so. So, yeah it's pretty powerful :-) (yeah, that's not tcpdump, but all tcpdump is is a compiler for this processor) -- Alan Batie ______ batie@agora.rdrop.com \ / Assimilate this! +1 503 452-0960 \ / --Worf, First Contact DE 3C 29 17 C0 49 7A 27 \/ 40 A5 3C 37 4A DA 52 B9 It is my policy to avoid purchase of any products from companies which use unrequested email advertisements or telephone solicitation.
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