lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Wed, 21 Jul 2010 09:34:27 -0700
From:	Casey Leedom <leedom@...lsio.com>
To:	Andy Gospodarek <andy@...yhouse.net>
Cc:	Harald Hoyer <harald@...hat.com>,
	David Miller <davem@...emloft.net>, shemminger@...tta.com,
	bhutchings@...arflare.com, sassmann@...hat.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	gospo@...hat.com, gregory.v.rose@...el.com,
	alexander.h.duyck@...el.com
Subject: Re: [PATCH net-next] sysfs: add entry to indicate network interfaces with random MAC address

| From: Andy Gospodarek <andy@...yhouse.net>
| Date: Wednesday, July 21, 2010 08:07 am
| 
| Agreed.  The subtle difference between a locally assigned address that
| is persistent and one that is random would be helpful.

  And just to point out that this case _does_ exist: the igb/igbvf drivers use 
random_ether_addr() to generate a random, locally assigned MAC address for the 
PCI-E SR-IOV Virtual Function MAC Addresses while the cxgb4/cxgb4vf drivers use 
a persistent, non-random locally assigned MAC Addresses.

  Note that I am neither arguing for nor against the proposal.  I'm just 
pointing out an existence case for the distinction.  And yes, bit 1 being set in 
the first octet of a MAC address for locally assigned MAC Addresses is part of 
the IEEE 802 specification just as bit 0 being set in the same octet indicates 
that it's a multi-station address.

Casey
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists