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Date:	Wed, 30 Mar 2016 23:35:40 -0400
From:	Willem de Bruijn <>
To:	Soheil Hassas Yeganeh <>
Cc:	David Miller <>,
	Network Development <>,
	Willem de Bruijn <>,
	Eric Dumazet <>,
	Yuchung Cheng <>,
	Neal Cardwell <>,
	Martin KaFai Lau <>,
	Soheil Hassas Yeganeh <>
Subject: Re: [PATCH net-next 2/8] tcp: accept SOF_TIMESTAMPING_OPT_ID for
 passive TFO

On Wed, Mar 30, 2016 at 6:37 PM, Soheil Hassas Yeganeh
<> wrote:
> From: Soheil Hassas Yeganeh <>
> SOF_TIMESTAMPING_OPT_ID is set to get data-independent IDs
> to associate timestamps with send calls. For TCP connections,
> tp->snd_una is used as the starting point to calculate
> relative IDs.
> This socket option will fail if set before the handshake on a
> passive TCP fast open connection with data in SYN or SYN/ACK,
> since setsockopt requires the connection to be in the
> To address these, instead of limiting the option to the
> ESTABLISHED state, accept the SOF_TIMESTAMPING_OPT_ID option as
> long as the connection is not in LISTEN or CLOSE states.
> Signed-off-by: Soheil Hassas Yeganeh <>

Acked-by: Willem de Bruijn <>

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