netdev - Re: [RFC] ethernet: avoid pre-assigned OUI values in random_ether

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Date:	Sun, 15 May 2011 13:20:50 -0700
From:	Joe Perches <joe@...ches.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Stephen Hemminger <shemminger@...tta.com>, netdev@...r.kernel.org
Subject: Re: [RFC] ethernet: avoid pre-assigned OUI values in
 random_ether_addr

On Sun, 2011-05-15 at 21:46 +0200, Eric Dumazet wrote:
> Le vendredi 13 mai 2011 à 17:17 -0700, Stephen Hemminger a écrit :
> > There are some addresses in the assigned vendor block that don't obey
> > the locally assigned convention. These should be avoided by random_ether_addr
> > assignment.
> We call random_ether_addr() for some virtual devices, maybe we can add a
> __random_ether_addr() helper for them and not avoid these OUI ?

Unless it's speed critical, it's probably not worthwhile.

I think that using get_random_bytes, because it can drain
the entropy pool, may not be a great thing to do.

There's little value in crypto secure OUI's for random
ethernet addresses.

I think using get_random_int or random32 is probably good
enough.

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