netdev - Re: Miscalculated TCP ACK ?

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Message-ID: <CAPbw_hy7xjhWSsiHnB9HN+ROCEUNzOS8aPsFwjvdY4FY+pRVjw@mail.gmail.com>
Date:	Mon, 22 Aug 2011 13:05:16 -0500
From:	Gabriel Beddingfield <gabrbedd@...il.com>
To:	netdev@...r.kernel.org
Subject: Re: Miscalculated TCP ACK ?

On Mon, Aug 22, 2011 at 12:19 PM, Daniel Baluta <daniel.baluta@...il.com> wrote:
>>> It appears to me that the ACK is off-by-one (should have been 27676).
>>> The server replies again with retransmissions.  This is with several
>>> kernel versions on local machines, ranging from 2.6.31 to 2.6.38.
>
>> Not a bug if frame carried a FIN

The server packet had the FIN bit set.

> Well then, why do retransmissions occur?
> Gabriel could you post the full capture file?

Sure: http://gabe.is-a-geek.org/tmp/20110822-skyward-conversation-segment.tcpdump

I clipped the conversation to the vicinity of the problem.

-gabriel
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