From owner-freebsd-net Fri Feb 15 8:21:39 2002 Delivered-To: freebsd-net@freebsd.org Received: from web21106.mail.yahoo.com (web21106.mail.yahoo.com [216.136.227.108]) by hub.freebsd.org (Postfix) with SMTP id A68CD37B427 for ; Fri, 15 Feb 2002 08:20:57 -0800 (PST) Message-ID: <20020215162056.49296.qmail@web21106.mail.yahoo.com> Received: from [152.15.63.69] by web21106.mail.yahoo.com via HTTP; Fri, 15 Feb 2002 08:20:56 PST Date: Fri, 15 Feb 2002 08:20:56 -0800 (PST) From: Vinod Namboodiri Subject: Re: MAC Layer of TCP/IP stack To: Jason Hunt Cc: freebsd-net@freebsd.org, freebsd-mobile@freebsd.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Not actually.Its more to run QoS experiments and need to customize some medium access protocols like csma/ca e.t.c.Guess i cant get to the csma protocol from the freebsd tcp/ip stack source code. Vinod --- Jason Hunt wrote: > If you mean that you would like to change the MAC > address that the card > has programmed into it, then yes you can change it, > but not perminatly. > The MAC address is hard-coded into the card, and is > restored on a reboot > if you change it. You can configure the machine to > use a MAC address that > you specify by using the option I've pasted below. > > This is from the ifconfig(8) man page: > > lladdr addr > Set the link-level address on an interface. > This can be used to > e.g. set a new MAC address on an ethernet > interface, though the > mechanism used is not ethernet-specific. The > address addr is > specified as a series of colon-separated hex > digits. If the > interface is already up when this option is > used, it will be > briefly brought down and then brought back > up again in order to > insure that the receive filter in the > underlying ethernet hard- > ware is properly reprogrammed. > > > Hope this helps. > > > On Thu, 14 Feb 2002, Vinod Namboodiri wrote: > > > Hi there.I am about to embark on a research > project > > wherein some changes need to be made in the MAC > layer > > of the TCP/IP stack.We have a wireless testbed > running > > on FreeBSD.I had a few doubts.can i make the > changes > > from the TCP/IP stack source code of FreeBSD?I > dont > > know much about the source code of the stack.or > would > > i need to be modifying the firmware of the > wireless > > network card which probably has the mac layer > code? > > > > Could use some help. > > Vinod > > > > > > __________________________________________________ > > Do You Yahoo!? > > Send FREE Valentine eCards with Yahoo! Greetings! > > http://greetings.yahoo.com > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-mobile" in the body of > the message > > > > > > __________________________________________________ Do You Yahoo!? Got something to say? Say it better with Yahoo! Video Mail http://mail.yahoo.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message