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Re: [PATCH 01/19] orinoco: Add ESSID specific scanning for Agere fw

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Dan Williams wrote:
On Wed, 2008-08-06 at 22:08 +0100, Dave wrote:
Dan Williams wrote:
Well, since the driver supports SSID scanning, we can use ap_scan=1
anyway.  ap_scan=2 is actually pretty evil since it depends on WEXT
ordering and whatnot.

ap_scan=1 requires the use of SIOCSIWWAP (to set desired BSSID), which
the Agere firmware doesn't support. The firmware only supports setting a
desired SSID (via SIOCSIWESSID), so Agere based orinoco is stuck with
ap_scan=2 :(

Symbol and Intersil don't have this problem.

In practice that shouldn't be a problem because drivers (at least
ipw2200 does this) usually roam BSSIDs anyway.  Technically a bug I
think.  But honestly, the driver needs to work with ap_scan=1 and I
don't see why it couldn't.

I had a reread of <http://hostap.epitest.fi/wpa_supplicant/devel/driver_wrapper.html>.
As a FullMAC driver without support for selecting the BSSID to associate with (or frequency in Managed mode), the only way I can see to make the driver work with ap_scan=1 is to silently ignore the SIOCSIWFREQ and SIOCSIWAP. I don't think this is an approach I would want to pursue.

That said, what's wrong with the ap_scan=2 mode? You've stated it's not great (and I'm prepared to believe it), but what is the actual problem?



Dave.
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