netdev - Re: [RFC] mac80211: disallow bridging managed/adhoc interfaces

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Date:	Tue, 17 Nov 2009 12:41:08 -0800
From:	Dan Williams <dcbw@...hat.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	Johannes Berg <johannes@...solutions.net>,
	Michael Buesch <mb@...sch.de>, netdev <netdev@...r.kernel.org>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	Felix Fietkau <nbd@...nwrt.org>
Subject: Re: [RFC] mac80211: disallow bridging managed/adhoc interfaces

On Tue, 2009-11-17 at 09:04 -0800, Stephen Hemminger wrote:
> On Tue, 17 Nov 2009 17:43:43 +0100
> Johannes Berg <johannes@...solutions.net> wrote:
> 
> > On Tue, 2009-11-17 at 08:37 -0800, Stephen Hemminger wrote:
> > 
> > > But there are people bridging wireless, and hostap even has a mode for
> > > that. 
> > 
> > But that's the AP side, which this patch doesn't attempt to prevent. It
> > just makes no sense to bridge when connected to an AP or part of an
> > IBSS.
> > 
> 
> Then how does this work now? And will your change break it?
> 
>                              kvm1
>                             /
>      ====> wlan0  --- bridge-- kvm2
>                             \
>                              kvm3

Are you sure 'bridge' isn't NAT-ed to wlan0 like libvirt/etc do by
default?  That's about the only way it can possibly work correctly with
wifi.

Dan


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