netdev - Re: [Bug 24842] New: Compatibility issue with uggly Windows RFC1323 implementation.

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Message-Id: <20101216.140851.15238748.davem@davemloft.net>
Date:	Thu, 16 Dec 2010 14:08:51 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	dmitriy.balakin@...neiron.ru, shemminger@...tta.com,
	netdev@...r.kernel.org
Subject: Re: [Bug 24842] New: Compatibility issue with uggly Windows
 RFC1323 implementation.

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Mon, 13 Dec 2010 23:31:02 +0100

> [PATCH net-next-2.6] tcp: relax tcp_paws_check()
> 
> Some windows versions have wrong RFC1323 implementations, with SYN and
> SYNACKS messages containing zero tcp timestamps.
> 
> We relaxed in commit fc1ad92dfc4e363 the passive connection case
> (Windows connects to a linux machine), but the reverse case (linux
> connects to a Windows machine) has an analogue problem when tsvals from
> windows machine are 'negative' (high order bit set) : PAWS triggers and
> we drops incoming messages.
> 
> Fix this by making zero ts_recent value special, allowing frame to be
> processed.
> 
> Based on a report and initial patch from Dmitiy Balakin
> 
> Bugzilla reference : https://bugzilla.kernel.org/show_bug.cgi?id=24842
> 
> Reported-by: dmitriy.balakin@...neiron.ru
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied to net-next-2.6, thanks!
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