[PATCH] wpa_supplicant: work around for drivers lacking direct scan

Jouni Malinen jkmaline at cc.hut.fi
Sun Jan 29 12:18:35 EST 2006


On Fri, Jan 27, 2006 at 02:41:34PM -0800, Derek Taubert wrote:

> This patch helps to find cloaked networks from wireless drivers that
> don't support a direct scan (such as the ipw2200 pre-WIRELESS_EXT v18).
> The association request causes the AP to respond, which is then picked
> up by the scan.
> 
> It's a nice alternative to turning on ap_scan=2 because:
> 1) It can be turned on per network.
> 2) Explicit security policies aren't required.

The scan command is expected not to break current association, but this
change would likely do that. I would like to be able to trigger new
background scans for finding about roaming and RSN pre-authentication
candidates. Your patch would make this configurable, so in that sense,
it should not be an issue for default settings. Anyway, this kind of
configuration adds some extra burden on users and/or wpa_supplicant
integration with network setup scripts since they would need to know
which drivers require this kind of workaround.

Which drivers has this been tested with?

-- 
Jouni Malinen                                            PGP id EFC895FA



More information about the HostAP mailing list