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Date:      Thu, 13 Mar 2008 07:13:00 +0000 (UTC)
From:      "Bjoern A. Zeeb" <bz@FreeBSD.org>
To:        Mike Silbersack <silby@silby.com>
Cc:        freebsd-net@freebsd.org, "d.s. al coda" <coda.trigger@gmail.com>
Subject:   Re: TCP options order changed in FreeBSD 7, incompatible with some routers
Message-ID:  <20080313071242.Q50685@maildrop.int.zabbadoz.net>
In-Reply-To: <20080312235523.I60219@odysseus.silby.com>
References:  <f90b44e40803111756h517b373ala8afdff9395b7fac@mail.gmail.com> <20080312144207.P50685@maildrop.int.zabbadoz.net> <20080312235523.I60219@odysseus.silby.com>

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On Wed, 12 Mar 2008, Mike Silbersack wrote:

>
> On Wed, 12 Mar 2008, Bjoern A. Zeeb wrote:
>
>> On Tue, 11 Mar 2008, d.s. al coda wrote:
>> 
>>> - FreeBSD 7 has <mss 1412, sackOK, eol> (there is of course an aligning 
>>> nop
>>> after the eol, which tcpdump skips)
>> 
>> Which is a bug (the nop after the EOL) that I recently fixed in HEAD.
>> I am still curious to know if it's only ordering or the invalid padding
>> or both that keeps clients from connecting. The problem is getting
>> hands on such a problematic "client".
>
> Bjoern, can you get that fix MFC'd ASAP?

I'll do that the next hours.


> I've e-mailed a tcpdump developer asking how we can enhance it so that it 
> prints out <..., eol, nop> so that we can detect such errors more easily in 
> the future.
>
> I wish I had paid more attention to that part of the previous thread on this 
> topic!
>
> -Mike
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-- 
Bjoern A. Zeeb                                 bzeeb at Zabbadoz dot NeT
Software is harder than hardware  so better get it right the first time.



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