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Date: Wed, 04 Apr 2012 12:13:13 +0200
From: Andre Oppermann <andre@freebsd.org>
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Cc: darrenr@freebsd.org, freebsd-net@freebsd.org
Subject: Re: FreeBSD TCP ignores zero window size
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On 04.04.2012 17:03, perryh@pluto.rain.com wrote:
> Andre Oppermann<andre@freebsd.org>  wrote:
>
>> The other side is retransmitting data we have already received
>> and acknowledged ... That behavior is totally non-compliant.
>
> Any chance our ack of that data got dropped/lost enroute, and the
> other side is resending after timing out?

The correct ACK is retransmitted about a dozen times for
re-synchronization.  Unlikely that all of them get lost.
On top of it the RST to terminate the session has the
correct SEQ.  Something's munging the SEQ/ACK space along
the way here.

-- 
Andre