From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755010AbYABCnK (ORCPT ); Tue, 1 Jan 2008 21:43:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752654AbYABCm5 (ORCPT ); Tue, 1 Jan 2008 21:42:57 -0500 Received: from dallas.jonmasters.org ([72.29.103.172]:56368 "EHLO dallas.jonmasters.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752582AbYABCm4 (ORCPT ); Tue, 1 Jan 2008 21:42:56 -0500 Subject: Re: Get physical MAC address From: Jon Masters To: Theewara Vorakosit Cc: linux-kernel@vger.kernel.org In-Reply-To: References: Content-Type: text/plain Organization: World Organi[sz]ation Of Broken Dreams Date: Tue, 01 Jan 2008 21:42:18 -0500 Message-Id: <1199241738.3300.63.camel@perihelion> Mime-Version: 1.0 X-Mailer: Evolution 2.12.2 (2.12.2-2.fc8) Content-Transfer-Encoding: 7bit X-SA-Do-Not-Run: Yes X-SA-Exim-Connect-IP: 74.92.29.237 X-SA-Exim-Mail-From: jonathan@jonmasters.org X-SA-Exim-Scanned: No (on dallas.jonmasters.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2007-12-31 at 12:39 +0700, Theewara Vorakosit wrote: > I get MAC address from ioctl. However, ifconfig can change this MAC > address. Can I get a real physical MAC address of the NIC? Forgive me reading into your mail...this smells a bit like some kind of licensing/compliance thing. Just bear in mind that using the MAC to verify the identity of a machine is utterly useless and pointless - anyone can trivially fool your software[0] to see what it "wants". Jon. [0] We used to have to do far worse kludgery in college, in order to prevent the silly powers that be who "banned" network cards other than those made by one manufacturer from being used on their little network.