Return-path: Received: from nbd.name ([46.4.11.11]:49355 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932185Ab1EaUWv (ORCPT ); Tue, 31 May 2011 16:22:51 -0400 Message-ID: <4DE54E16.7000709@openwrt.org> (sfid-20110531_222254_607187_875FC504) Date: Tue, 31 May 2011 22:22:46 +0200 From: Felix Fietkau MIME-Version: 1.0 To: Johannes Berg CC: linux-wireless@vger.kernel.org, linville@tuxdriver.com Subject: Re: [PATCH 2/3] mac80211: create a STA entry for a WDS interface after receiving a beacon References: <1306869394-83047-1-git-send-email-nbd@openwrt.org> <1306869394-83047-2-git-send-email-nbd@openwrt.org> <1306870354.29989.1.camel@jlt3.sipsolutions.net> <4DE543E2.9070600@openwrt.org> <1306872395.29989.3.camel@jlt3.sipsolutions.net> In-Reply-To: <1306872395.29989.3.camel@jlt3.sipsolutions.net> Content-Type: text/plain; charset=UTF-8; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 2011-05-31 10:06 PM, Johannes Berg wrote: > On Tue, 2011-05-31 at 21:39 +0200, Felix Fietkau wrote: >> On 2011-05-31 9:32 PM, Johannes Berg wrote: >> > On Tue, 2011-05-31 at 21:16 +0200, Felix Fietkau wrote: >> >> When a STA entry is created too early, a lot of essential information >> >> required for rate control is missing. >> > >> > I don't understand how you can rely on beacons for WDS. >> You usually set up WDS links between APs on the same channel, each >> running both a normal AP vif and a WDS vif. The remote AP's beacons are >> then used to detect the capabilities of the peer. > > I don't think we can rely on "usually" unless we also enforce that > somehow. Otherwise this link will basically be dead. There's nothing > that requires you to add WDS to an AP interface only after all. I don't think using WDS without APs makes any sense. Since WDS alone does not use beacons or probe requests, there's nothing else that would ensure that rate information, HT capabilities, etc. get exchanged. - Felix