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Date:      Mon, 20 Sep 1999 10:36:09 -0600
From:      Nate Williams <nate@mt.sri.com>
To:        "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net>
Cc:        jobe@attrition.org (Jobe), security@FreeBSD.ORG
Subject:   Re: Real-time alarms
Message-ID:  <199909201636.KAA01106@mt.sri.com>
In-Reply-To: <199909200629.XAA57821@gndrsh.dnsmgr.net>
References:  <Pine.LNX.3.96.990919225507.13128G-100000@forced.attrition.org> <199909200629.XAA57821@gndrsh.dnsmgr.net>

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> Myself, I like the idea of how bpf handles the filtering side.  Compile
> up an expression and shove it into the kernel so you minimize copy out
> operations.

FWIW, I agree completely, and actually looked a bit into this.  However,
figuring out how to do that in the as-yet mostly unspecified audit
records is time-consuming.  Let's get it working first, then see what
falls out, including a potential re-write of the entire auditing record
so that 'apf' can be implemented. :)

(As a point of reference, Solaris 'claims' to have kernel level
filtering, but it turns out that it just sets a 'flag' in the audit
record that tells the userland program whether or not the user asked for
this record, so the filtering is done at userland. *blah*)


Nate




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