netdev - Re: no reassembly for outgoing packets on RAW socket

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Message-ID: <4C08EB85.3050900@trash.net>
Date:	Fri, 04 Jun 2010 14:03:17 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	netdev@...r.kernel.org
Subject: Re: no reassembly for outgoing packets on RAW socket

Jiri Olsa wrote:
> hi,
> 
> I'd like to be able to sendout a single IP packet with MF flag set.
> 
> When using RAW sockets the packet will get stuck in the
> netfilter (NF_INET_LOCAL_OUT nf_defrag_ipv4 reassembly unit)
> and wont ever make it out..
> 
> I made a change which bypass the outgoing reassembly for
> RAW sockets, but I'm not sure wether it's too invasive..

That would break reassembly (and thus connection tracking) for cases
where its really intended.

> Is there any standard for RAW sockets behaviour?
> Or another way around? :)

You could use the NOTRACK target to bypass connection tracking.
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