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Date:      Tue, 16 May 2006 09:29:13 +0100
From:      David Malone <dwmalone@maths.tcd.ie>
To:        Max Laier <max@love2party.net>
Cc:        cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org
Subject:   Re: cvs commit: src/sys/netinet ip_fw2.c 
Message-ID:  <200605160929.aa90920@salmon.maths.tcd.ie>
In-Reply-To: Your message of "Tue, 16 May 2006 01:05:00 %2B0200." <52078.192.168.4.1.1147734300.squirrel@mail.abi01.homeunix.org> 

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> Interesting - thanks for the pointer.  Unless every stack DTRT we can't
> use the flow_id, though - or we break otherwise legal connections.  In the
> given case we would open a state with SYN+flow_id and got a reply SYNACK+0
> which wouldn't hash the same as the SYN we sent out.  No matching state,
> no connection.

Indeed - we need to get into the position where almost all stacks
do the right thing before we can use the flow label as a key of any
sort in the firewalling process. If people have noticed problems
with this, I'd be interested in knowing which stacks are incriminated.

	David.


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