From owner-freebsd-net@FreeBSD.ORG Wed Jul 24 01:00:54 2013 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 4743E919 for ; Wed, 24 Jul 2013 01:00:54 +0000 (UTC) (envelope-from zbeeble@gmail.com) Received: from mail-ve0-x22d.google.com (mail-ve0-x22d.google.com [IPv6:2607:f8b0:400c:c01::22d]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 089B9201F for ; Wed, 24 Jul 2013 01:00:53 +0000 (UTC) Received: by mail-ve0-f173.google.com with SMTP id jw11so6516415veb.4 for ; Tue, 23 Jul 2013 18:00:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=VbvbNBey4brmVDpgSAZbgDX/cPkvho6o0nWMt5Jlunc=; b=aNgUP5jLdeXq7d6jvVqpTZ9JxO71QtI4xA9GnVogtPoEyyE83E2GUiYOi+0Ux5s+bf Cy6gMSbTF6BBk1vaZUvyM2LAQ610Uc2pseUiJD2S3MEmfx7N1D62Tg6GXkzzfY9s8HjR 8BaCHP7aTZdq3lDKJQ1Fk3p94qIEd/CytS6bhm1pVD5TSkbhwmo3ohblrebAjpJHI0AM pEA70x9fljAcfEKW3k5NHRC90VHAsFUgzbMFDtE/FotkTxY+zyv4X7Z1FEEsfS9E9BhU gngRoYw/EQ7weyCmT4KE7HdnZDIKWCWfxVGZaqbt4Kl0GvpQnTmYLIcDQT6tLCC3VC3A R4Rw== MIME-Version: 1.0 X-Received: by 10.58.234.161 with SMTP id uf1mr12701626vec.57.1374627653244; Tue, 23 Jul 2013 18:00:53 -0700 (PDT) Received: by 10.221.22.199 with HTTP; Tue, 23 Jul 2013 18:00:53 -0700 (PDT) In-Reply-To: References: <06BA4BD5-BE4E-4184-AFBB-D7FD4B2597D9@your.org> <3341F665-B179-4A99-B48A-81EE3D0478A6@your.org> Date: Tue, 23 Jul 2013 21:00:53 -0400 Message-ID: Subject: Re: Duplicate Address Detection misfire? From: Zaphod Beeblebrox To: Kevin Day Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 Cc: FreeBSD Net X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jul 2013 01:00:54 -0000 Doesn't my original suggestion still stand... regardless of how this particular problem is fixed? That is: if the sending MAC address is _our_ MAC address, then the address is not duplicate. It seems a simple change (unless the function that processes the packet would have difficulty determining the MAC address) and it seems to be infallible logic. In fact, if we receive a packet from our own MAC address, shouldn't we drop and log it?