linux-kernel - Re: forcedeth

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Date:	Wed, 27 Sep 2006 16:57:04 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Martin Filip <bugtraq@...ula.net>
Cc:	Björn Steinbrink <B.Steinbrink@....de>,
	linux-kernel@...r.kernel.org, Ayaz Abdulla <aabdulla@...dia.com>
Subject: Re: forcedeth - WOL [SOLVED]

On Wed, 27 Sep 2006 22:38:06 +0200
Martin Filip <bugtraq@...ula.net> wrote:

> Hi,
> 
> Bj__rn Steinbrink p____e v St 27. 09. 2006 v 20:38 +0200:
> 
> > Did you check that WOL was enabled? I need to re-activate it after each
> > boot (I guess that's normal, not sure though).
> > The output of "ethtool eth0" should show:
> > 
> >         Supports Wake-on: g
> >         Wake-on: g
> > 
> Yes, of course :)
> 
> > Also, I remember a bugzilla entry in which it was said that the MAC was
> > somehow reversed by the driver. I that is still the case (I can't find
> > the bugzilla entry right now), you might just reverse the MAC address in
> > your WOL packet to workaround the bug.
> 
> Hey! this is really crazy :) but it works! To bo honest - I really do
> not know what crazy bug could cause problems like this. I thought it's
> NIC thing to manage all the work about WOL. I thought OS only sets NIC
> into "WOL mode".
> 
> But seeing this - one packet for windows and one magic packet for linux
> driver - I really do not get it.
> 

Are you saying that byte-reversing the MAC address make WOL work correctly?

What tool do you use to send the packet, and how is it being invoked?

Do we know if this reversal *always* happens with this driver, or only
sometimes?

Thanks.
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