From: Patrick McHardy <kaber@trash.net>
To: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
Cc: Jan Engelhardt <jengelh@medozas.de>,
Stephen Hemminger <shemminger@vyatta.com>,
netfilter-devel@vger.kernel.org
Subject: Re: conntrack h323 reassembly
Date: Sat, 01 May 2010 18:27:43 +0200 [thread overview]
Message-ID: <4BDC567F.8080608@trash.net> (raw)
In-Reply-To: <4BDC33BF.2060303@plouf.fr.eu.org>
Pascal Hambourg wrote:
> Jan Engelhardt a écrit :
>> On Thursday 2010-04-29 01:55, Stephen Hemminger wrote:
>>
>>> It seems that h323 conntrack module can't handle TCP fragments.
>> Fragments should not normally happen, as nf_conntrack loads
>> nf_defrag.
>
> What about IPv6 fragments ? IIUC the IPv6 conntrack only performs a
> "virtual" reassembly. Can and do the conntrack helpers use the virtually
> reassembled datagrams ?
>
> (Although IIUC TCP fragmentation should be very unlikely, as the TCP
> layer is informed about the path MTU and should adjust the segment size
> accordingly.)
Yes, the "virtual" reassembled packet is also passed to the helpers.
The message is most likely a false positive caused by non-H.323 traffic.
I'll switch it to pr_debug().
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prev parent reply other threads:[~2010-05-01 16:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-28 23:55 conntrack h323 reassembly Stephen Hemminger
2010-04-29 9:56 ` Jan Engelhardt
2010-05-01 13:59 ` Pascal Hambourg
2010-05-01 16:27 ` Patrick McHardy [this message]
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