From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Howells <dhowells@redhat.com>
Subject: Re: Is it possible to get Rx timestamps in skb->tstamp?
Date: Wed, 19 Sep 2018 14:43:04 +0100
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To: Toke
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Toke Høiland-Jørgensen <toke@toke.dk> wrote:

> > Is it possible to tell a UDP socket that you'd like it to put
> > reception timestamps in skb->tstamp?
> 
> I think you probably want SO_TIMESTAMP*?
> 
> See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/networking/timestamping.txt

That seems to work.  I thought that only affected recvmsg() putting the
timestamp into the ancillary data buffer, but apparently not.

Thanks,
David