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Date:      Fri, 5 Aug 2016 10:03:23 +0200
From:      Jan Bramkamp <crest@rlwinm.de>
To:        freebsd-ipfw@freebsd.org
Subject:   Re: IPFW: more "orthogonal? state operations, push into 11?
Message-ID:  <033c79d5-2a66-1000-7d2b-c81fdb287690@rlwinm.de>
In-Reply-To: <24bf65d1-1b4f-07a0-5a3c-93fd906f5705@freebsd.org>
References:  <9229d4f7-8466-57b0-c954-117736102bd7@FreeBSD.org> <5755F0D3.9060909@FreeBSD.org> <5759DB79.10205@FreeBSD.org> <3d09497c-136c-e217-154c-ba00e6879c6f@freebsd.org> <20160616005016.A15883@sola.nimnet.asn.au> <d7bef617-70a4-f761-7d09-9413eb720b11@freebsd.org> <64d6bdea-fa32-f16f-2fdd-abd33d54d04e@freebsd.org> <46d5cfde-c4ac-ebd0-3c13-2759037621f3@FreeBSD.org> <11a5d41b-109a-434b-e8e0-7ed2826a8cc9@FreeBSD.org> <ee745842-c33e-4e73-f84c-6eb11f283b51@FreeBSD.org> <a3e98e25-4c0d-56ad-5640-0b6f13ebeb21@freebsd.org> <6c2ebc59-c5b8-5be0-8842-897b2de44d1f@FreeBSD.org> <3c3d7026-ea60-c0dd-527b-edd841274585@freebsd.org> <20160805034606.K56585@sola.nimnet.asn.au> <24bf65d1-1b4f-07a0-5a3c-93fd906f5705@freebsd.org>

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On 05/08/16 06:36, Julian Elischer wrote:
> I ended up having to do this via an ugly use of skiptos where packets
> I wanted to forward, were identified early and then sent to a duplicate
> set of
> rules which also did the divert,  but then did the forward. I think
> there were
> about 25 rules duplicated.

You could deduplicate this with a call/return pair but good luck ever 
debugging it if something goes wrong because the call/return stack is 
tied to the mbuf "allowing" you to call during igress and return during 
egress for maximal confusion.



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