netdev - Re: Asserting ECN from userspace?

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Message-ID: <m2hb3l3cgq.fsf@firstfloor.org>
Date:	Thu, 06 Oct 2011 16:52:05 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	David Täht <dave.taht@...il.com>
Cc:	netdev@...r.kernel.org, bloat-devel@...ts.bufferbloat.net
Subject: Re: Asserting ECN from userspace?

David Täht <dave.taht@...il.com> writes:
>
> And twiddling them, on a per stream basis, for a single packet, would
> seem to require something more robust than setsockopt/getsockopt
> (although that would work for udp streams)

With netfilter nf_queue you can construct a rule that passes packets
through user space and reinjects them.

I would suggest to just use that to modify the ECN bits.

I'm sure with reasonable google skills you can find some examples
how to do this on the web.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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