netdev - Re: strange Mac OSX RST behavior

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Message-ID: <5776B5E9.4080100@akamai.com>
Date:	Fri, 1 Jul 2016 14:26:49 -0400
From:	Jason Baron <jbaron@...mai.com>
To:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
CC:	Rick Jones <rick.jones2@....com>, <linux-kernel@...r.kernel.org>,
	<netdev@...r.kernel.org>, <davem@...emloft.net>,
	<eric.dumazet@...il.com>
Subject: Re: strange Mac OSX RST behavior



On 07/01/2016 02:16 PM, One Thousand Gnomes wrote:
>> yes, we do in fact see a POLLRDHUP from the FIN in this case and
>> read of zero, but we still have more data to write to the socket, and
>> b/c the RST is dropped here, the socket stays in TIME_WAIT until
>> things eventually time out...
> 
> After the FIN when you send/retransmit your next segment do you then get
> a valid RST back from the Mac end?
> 
> Alan
> 

No, we only get the single RST after the FIN from the Mac side which
is dropped. I would have expected the RST from the Mac after the
retransmits, but we don't see any further transmits from the Mac.
And the linux socket stays in CLOSE-WAIT (i mistakingly said
TIME_WAIT above).

For reference, I put the packet exchange in my initial mail.

Thanks,

-Jason