2009-09-29 13:18:59

by Holger Schurig

[permalink] [raw]
Subject: scan_request->nr_ssids never 0 ?

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?



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)

--
http://www.holgerschurig.de


2009-09-29 14:04:39

by Johannes Berg

[permalink] [raw]
Subject: Re: scan_request->nr_ssids never 0 ?

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


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