From owner-freebsd-current@FreeBSD.ORG Thu Oct 20 14:24:55 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F362F16A428; Thu, 20 Oct 2005 14:24:54 +0000 (GMT) (envelope-from jim@netgate.com) Received: from netgate.com (mail.netgate.com [64.62.194.115]) by mx1.FreeBSD.org (Postfix) with ESMTP id 040BB43D6A; Thu, 20 Oct 2005 14:24:53 +0000 (GMT) (envelope-from jim@netgate.com) Received: by netgate.com (Postfix, from userid 45) id E340D280019; Thu, 20 Oct 2005 07:24:53 -0700 (PDT) Received: from [192.168.1.183] (rrcs-67-52-77-54.west.biz.rr.com [67.52.77.54]) by netgate.com (Postfix) with ESMTP id CCD2B280016; Thu, 20 Oct 2005 07:24:48 -0700 (PDT) In-Reply-To: <4357A115.50106@nortel.com> References: <43560B6A.4070505@mikulas.com> <20051019091559.GA45009@heff.fud.org.nz> <43565782.8080706@nortel.com> <4357A115.50106@nortel.com> Mime-Version: 1.0 (Apple Message framework v734) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <78A36290-42C1-4A63-893B-7B4DCDA5CF3C@netgate.com> Content-Transfer-Encoding: 7bit From: Jim Thompson Date: Thu, 20 Oct 2005 04:24:45 -1000 To: "Andrew Atrens" X-Mailer: Apple Mail (2.734) X-Spam-Checker-Version: SpamAssassin 3.0.3 (2005-04-27) on he-colo.netgate.com X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=AWL,BAYES_00 autolearn=ham version=3.0.3 Cc: freebsd-current@freebsd.org, Jiri Mikulas , Andrew Thompson Subject: Re: ath client bridge X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Oct 2005 14:24:55 -0000 On Oct 20, 2005, at 3:52 AM, Andrew Atrens wrote: > Jim Thompson wrote: > >> Now, answer this question: Where do you send the ACKs when SA != TA? >> > > SA I'm guessing. (Only one second of thought though :)). You'd treat > SA like a layer2 gateway. If you don't send an ACK back to TA, then TA will retry (potentially several times). (So the answer is 'TA'.) >>> There is a four address version of the packet header, but as I >>> recall the fourth >>> address is used by TKIP. >>> >> nope. >> > > Thanks. My answer was based on just snoopinig around in the > net80211 source > code - the only usages I found of ieee80211_frame_addr4 were in > crypto_ccmp and > crypto_tkip. because the net80211 code that implements WDS hasn't escaped the lab (yet). > >>> >>> So it's a problem with 802.11 standard. I think that's why they >>> came up with WDS. >>> I think there's some support for WDS in MadWiFi, but not yet in >>> the BSD stack(s). >>> >> As the term is commonly used, WDS *is* the 4-address frame format. >> > > Makes sense. Thought there might be more to it than that, for > instance AP's > tracking/coordinating with other AP's with the same ssid and > channel. But > I really haven't looked at it, to be completely honest. :) > > I know that when I put my laptop in AP mode (same channel and ssid > as my master > AP), on the laptop, I stop hearing packets coming from my master AP. The two APs have no (current) method to send packets to each other across the wireless media. Jim