On Tue, 2009-09-29 at 15:18 +0200, Holger Schurig wrote:

Even when I do an "iw xxx scan trigger", scan_request->nr_ssids 
is always 1 in my driver.

Is this a bug or a feature?

# iw wlan0 scan trigger passive

However, scan_request->ssids[0].ssid_len is 0.

So to ask my firmware for an SSID scan, I need to do 

 if (req->n_ssids && req->ssid[0].ssid_len)

instead of simply

 if (req->n_ssids)

No. You need to ask it to probe for the wildcard SSID, which is 0 bytes
long.

johannes