netdev - Re: [PATCH rfc 1/4] net-timestamp: pull headers for SOCK

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Message-ID: <20141127123040.GA4443@localhost.localdomain>
Date:	Thu, 27 Nov 2014 13:30:40 +0100
From:	Richard Cochran <richardcochran@...il.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Willem de Bruijn <willemb@...gle.com>,
	David Miller <davem@...emloft.net>,
	Network Development <netdev@...r.kernel.org>
Subject: Re: [PATCH rfc 1/4] net-timestamp: pull headers for SOCK_STREAM

On Wed, Nov 26, 2014 at 04:36:39PM -0800, Andy Lutomirski wrote:
> Is there any reason to believe that unconditionally dropping the
> headers would break anything?  I find it a bit hard to believe that
> anyone has actually implemented logic to figure out *what* L2 header
> type should be decoded and decode it.

Documentation/networking/timestamping/timestamping.c

				else if (!memcmp(sync, data + res - sizeof(sync),
							sizeof(sync)))
					printf(" => GOT OUR DATA BACK (HURRAY!)");

The example program looks from the end of the buffer, ignoring the lower headers.

Thanks,
Richard


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