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Date: Wed, 3 Oct 2007 10:52:43 -0700
From: "Jack Vogel" <jfvogel@gmail.com>
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	"FreeBSD Current" <freebsd-current@freebsd.org>
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Subject: RFC: Capability addition for IEEE 1588
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I am adding support into the em driver for PTP, what I would prefer doing is
to add interface capability support: IFCAP_TSYNC or something like that.
The driver will then enable/disable the feature.

Are there other vendor's hardware providing this support such that a
net/if.h capability would be justified?

There was also some other defines that are needed, an ethertype
for instance, I forget what it was offhand but I did notice it wasn't
there yet.

Cheers,

Jack