Connecting external registrar to wpa_supplicant?

Jouni Malinen j at
Fri Mar 4 06:39:34 PST 2016

On Fri, Mar 04, 2016 at 03:26:17PM +0100, Morten Bruun wrote:

> The wpa_supplicant in the Homebrew AP is external registrar for
> the two radios. The communication between these are kept on a
> subnet that I do not wish to expose.

Why would you use an ER within the AP when hostpad has internal

> I would like to authenticate enrollees using an external
> registrar, but I'm not sure how to do that, hence the 'magic
> component'.

What is this "external registrar"? Normally, WPS ER would refer to a
component like "wpa_supplicant (ER mode)" you had in the diagram, but
that would be outside the AP device and would communicate with UPnP (to
the WPS code in hostapd).

> I was thinking if hostapd could be used for this. But I can't see
> exactly how this could be done. Do I need to build my own UPnP
> component to do the communication between the wpa_supplicant in
> the AP and the external registrar.

hostapd as WPS AP and wpa_supplicant as WPS ER include implementation of
UPnP component for using the standard WPS protocol.

Jouni Malinen                                            PGP id EFC895FA

More information about the Hostap mailing list