netdev - Re: [patch net-next 2/3] netfilter: ip6_tables: use reasm skb for matching

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Message-ID: <20131106141845.GC2458@minipsycho.orion>
Date:	Wed, 6 Nov 2013 15:18:45 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	Florian Westphal <fw@...len.de>, netdev@...r.kernel.org,
	davem@...emloft.net, pablo@...filter.org,
	netfilter-devel@...r.kernel.org, yoshfuji@...ux-ipv6.org,
	kadlec@...ckhole.kfki.hu, mleitner@...hat.com,
	kuznet@....inr.ac.ru, jmorris@...ei.org, wensong@...ux-vs.org,
	horms@...ge.net.au, ja@....bg, edumazet@...gle.com,
	pshelar@...ira.com, jasowang@...hat.com,
	alexander.h.duyck@...el.com, coreteam@...filter.org
Subject: Re: [patch net-next 2/3] netfilter: ip6_tables: use reasm skb for
 matching

>> >So if someone wants to change this, simply *only* pass the reassembled
>> >packet through the netfilter hooks and drop the fragments, as in IPv4.
>> 
>> This is unfortunatelly not possible because in forwarding use case, the
>> fragments have to be send out as they come in.
>
>No, the IPv6 NAT patches fixed that, we still do proper refragmentation
>and we still respect the original fragment sizes, thus are not responsible
>for potentially exceeding the PMTU on the following path.

Can you please point where this is done. Where the original fragment
sizes are stored and in which code are they restored? Thanks.

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