From owner-freebsd-mobile Sat Aug 17 14:50:19 2002 Delivered-To: freebsd-mobile@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id DB7DE37B406 for ; Sat, 17 Aug 2002 14:50:15 -0700 (PDT) Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id E5DE343E65 for ; Sat, 17 Aug 2002 14:50:14 -0700 (PDT) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.12.3/8.12.3) with ESMTP id g7HLoDQe010926; Sat, 17 Aug 2002 15:50:13 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Sat, 17 Aug 2002 15:49:29 -0600 (MDT) Message-Id: <20020817.154929.130696556.imp@bsdimp.com> To: eyurtese@turkuamk.fi Cc: mobile@FreeBSD.ORG Subject: Re: IBSS and BSS with multiple FreeBSD Wireless Gateways From: "M. Warner Losh" In-Reply-To: References: X-Mailer: Mew version 2.1 on Emacs 21.2 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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 In message: Evren Yurtesen writes: : Is it possible to use FreeBSD with IBSS or BSS mode as a bridge to : overcome line of sight issues? and provide roaming for mobile users? "bridge" is likely not the word that you want to use here. The wi driver cannot act as a bridge, except when it is being used in hostap mode. Otherwise, there are some weird issues that I can't exactly recall, but that tend to screw people up a lot on. Ideally, you'd want to have two APs that talked to each other, maybe via a third party proxie. However, none of that code is currently implemented in FreeBSD's hostap stuff. : What is the biggest problem if we are using IBSS mode? Association might be the biggest issue, but if you make everybody a ibss-master this is minimized. Also, if you have ancient firmware on some prism2 (like less than 0.6) and/or old firmware on lucent cards (in the 6.0.6 range), then you'll have issues wrt standards conformance. : Another question is if we are using IBSS mode and 2 clients are close : to each other but the gateway is little bit more far away. Does it cause : the clients to choose each other instead of the gateway because they : have stronger signal? If this happens, wouldnt this cause the link to : the gateway be broken? IBSS mode causes people to try to talk directly to each other as much as possible. I don't know what the relaying rules for ibss are, but if you need to rely on a man in the middle, then you are likely going to be frustrated. I've never tried it, so maybe it just works, but I kinda doubt it. Grab, read and understand the 802.11 spec :-) Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message