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Subject: Re: Implementing Mikrotik IE
From:   Johannes Berg <johannes@sipsolutions.net>
To:     Josef Miegl <josef@miegl.cz>
Cc:     Sebastian Gottschall <s.gottschall@newmedia-net.de>,
        linux-wireless <linux-wireless@vger.kernel.org>
Date:   Thu, 22 Aug 2019 09:00:18 +0200
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On Wed, 2019-08-21 at 23:17 +0200, Josef Miegl wrote:
> On August 21, 2019 10:12:26 PM GMT+02:00, Johannes Berg <johannes@sipsolutions.net> wrote:
> > What AP are you trying to connect to? Have you tried adding some other
> > random vendor IE, with an OUI that the AP is almost certain to not
> > know?
> > Maybe it's actually interpreting this somehow?
> > 
> > Would you be willing to show sniffer captures so we could take a look?
> > 
> > johannes
> 
> Of course it's interpreting the IE. Random vendor IE works fine. 

Ok, that wasn't really clear to me until now.

> Let me explain why I'm even bothering with sending this mikrotik IE in
> association requests. The Mikrotik IE has a flag that tells the AP if
> the station wants WDS. Setting that flag and sending the mikrotik IE
> is required for transparent bridging with a mikrotik AP.

Aha, ok.

> Sending the Mikrotik IE with the WDS bit set to 0 works fine. 

Even more curious :-)

> Now I'm sure this is a problem on Mikrotiks side, however in ubnts
> airos this works as expected, and since their airos is probably based
> on openwrt there has to be a way to make this work.
> 
> I will send you the captures, however there doesn't seem to be
> anything much interesting in them.

Indeed, it seems unlikely I could get anything from that.

Do you have a successful handshake done by a "real" client
implementation?

Perhaps it expects the 4-way-HS to already be in 4-addr frame format, or
something else special in the 4-way-HS if you have WDS?

johannes