From owner-freebsd-mobile Thu May 2 2:17:27 2002 Delivered-To: freebsd-mobile@freebsd.org Received: from cain.gsoft.com.au (genesi.lnk.telstra.net [139.130.136.161]) by hub.freebsd.org (Postfix) with ESMTP id 0FE7137B41A; Thu, 2 May 2002 02:17:22 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by cain.gsoft.com.au (8.12.2/8.12.2) with ESMTP id g429H9Bh036792; Thu, 2 May 2002 18:47:10 +0930 (CST) (envelope-from doconnor@gsoft.com.au) Subject: Re: Ad-Hoc with Windows? From: "Daniel O'Connor" To: "Greg 'groggy' Lehey" Cc: freebsd-mobile@FreeBSD.org, Wes Peters , Jerry Dunham , Jerry Dunham , jdunham@texas.net In-Reply-To: <20020502183058.A52284@wantadilla.lemis.com> References: <1020327165.442.165.camel@chowder.gsoft.com.au> <20020502183058.A52284@wantadilla.lemis.com> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.3 Date: 02 May 2002 18:47:08 +0930 Message-Id: <1020331032.442.168.camel@chowder.gsoft.com.au> Mime-Version: 1.0 X-Spam-Status: No, hits=-5 required=5 X-Spam-Level: (-5) X-Scanned-By: MIMEDefang 2.6 (www dot roaringpenguin dot com slash mimedefang) Sender: owner-freebsd-mobile@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Thu, 2002-05-02 at 18:30, Greg 'groggy' Lehey wrote: > The real issue here is that you're using the Lucent "demo ad-hoc" mode > instead of the "ad-hoc" mode that the 802.11 standard claims is a > slang term for IBSS mode. I've just (hopefully) completed a > protracted discussion with Wes Peters and Jerry Dunham (copied) on the > subject. > > Basically, IBSS mode (the IEEE 802.11 sanctioned peer-to-peer mode) is > the only one which works generally. That's why we couldn't get any > connectivity with the Linux people on 27 December last year > (http://www.lemis.com/~grog/xmas-bbq-2001.html for those of you who > weren't there). We were running in demo ad-hoc mode, while Chris and > Rusty were trying to connect in IBSS mode, so it couldn't work. Since > then (at the LCA in February) we clarified the situation. The > results: Right.. Knew I should have brought my AP :) > > - The BSDs are doing it wrong. We should be using IBSS mode, not demo > ad-hoc. > - IBSS mode works with all systems I've tried it with. > - To set IBSS mode with Lucent cards, use -p 1 (just like managed mode > or whatever we'll call it this time). > - At least one interface must also do -c 1 (create IBSS). Note that > it says in the man page that it doesn't work. The man page lies. > - In all cases we've seen, the resultant BSSID is the MAC address of > the IBSS interface with the first octet xored with 0x02. I'd be > interested to hear if anybody finds another value. The standard > just says the BSSID will be random. > - On the Lucent cards, you don't get a signal strength indication. OK.. > > One of the details about which Wes and I couldn't agree was whether an > IBSS can route to the outside world. I say yes, because any system in > the IBSS can have other interfaces as well. This isn't covered in the > 802.11 standard, of course. Wes says no, because the 802.11 standard > (available for free from > http://standards.ieee.org/getieee802/download/802.11-1999.pdf, which > is nevertheless a web page) says that interconnection only works with > BSS (i.e. managed) mode. I claim that this just refers to link-level > interconnection, and that IP routing has nothing to do with 802.11. > Comments welcome. > > Greg > -- > See complete headers for address and phone numbers -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 9A8C 569F 685A D928 5140 AE4B 319B 41F4 5D17 FDD5 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message