From owner-freebsd-net@FreeBSD.ORG Wed Sep 8 18:44:01 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 11C5616A4CE for ; Wed, 8 Sep 2004 18:44:01 +0000 (GMT) Received: from mail-svr1.cs.utah.edu (mail-svr1.cs.utah.edu [155.98.64.200]) by mx1.FreeBSD.org (Postfix) with ESMTP id DDEE343D49 for ; Wed, 8 Sep 2004 18:44:00 +0000 (GMT) (envelope-from vaibhave@cs.utah.edu) Received: from faith.cs.utah.edu (faith.cs.utah.edu [155.98.65.40]) by mail-svr1.cs.utah.edu (Postfix) with ESMTP id B5FD0346F3 for ; Wed, 8 Sep 2004 12:44:00 -0600 (MDT) Received: by faith.cs.utah.edu (Postfix, from userid 4969) id 3AC7F2EC21; Wed, 8 Sep 2004 12:43:58 -0600 (MDT) Received: from localhost (localhost [127.0.0.1]) by faith.cs.utah.edu (Postfix) with ESMTP id 5D4E334406 for ; Wed, 8 Sep 2004 18:43:58 +0000 (UTC) Date: Wed, 8 Sep 2004 12:43:58 -0600 (MDT) From: Vaibhave Agarwal To: freebsd-net@freebsd.org Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Subject: carrier sensing in fxp drivers X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 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, 08 Sep 2004 18:44:01 -0000 hi In ieee 802.3 CSMA/CD, is it possible that i could check a register value set by hardware card or by some other way i could detect in the driver, as soon as the card senses that there is a packet on the wire ( i.e. even before the reception of the whole packet). Anybody's help would be highly appreciated. thanks vaibhave