From: Nepenthes Development Team <nepenthesdev@gmail.com>
To: Jan Engelhardt <jengelh@medozas.de>
Cc: netfilter-devel@vger.kernel.org
Subject: Re: TCPMSS clamp-mss-to-pmtu breaks packets that have no MSS set (incl. solution)
Date: Tue, 3 Aug 2010 09:29:10 +0200 [thread overview]
Message-ID: <AANLkTim=BLAwLo_VXG1OJ=4ewL2joS_HyGh3SbW6KutC@mail.gmail.com> (raw)
In-Reply-To: <alpine.LSU.2.01.1008021714500.13406@obet.zrqbmnf.qr>
Hi,
On Mon, Aug 2, 2010 at 5:16 PM, Jan Engelhardt <jengelh@medozas.de> wrote:
> If a packet has no MSS option, none will be added no more.
> (commit v2.6.34-rc1~233^2~154^2~44)
git log -1 -p v2.6.34-rc1~233^2~154^2~44
I found some changes to prevent setting an MSS if the SYN packet has a
payload already, and to prevent it from increasing the MSS, but
nothing to prevent if from setting the MSS if there was no MSS set
before.
The code to add an MSS option if none exists still exists,
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=net/netfilter/xt_TCPMSS.c;h=62ec021fbd50ddd278da5f9f53756587d83fb786;hb=HEAD#l116
Markus
next prev parent reply other threads:[~2010-08-03 7:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-30 1:01 TCPMSS clamp-mss-to-pmtu breaks packets that have no MSS set (incl. solution) Daniel Gibson
2010-08-02 15:16 ` Jan Engelhardt
2010-08-03 7:29 ` Nepenthes Development Team [this message]
2010-08-23 1:45 ` Daniel Gibson
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