Subject: Re: scan_request->nr_ssids never 0 ?
From: Johannes Berg <johannes@sipsolutions.net>
To: Holger Schurig <hs4233@mail.mn-solutions.de>
Cc: linux-wireless@vger.kernel.org
In-Reply-To: <200909291518.46655.hs4233@mail.mn-solutions.de>
References: <200909291518.46655.hs4233@mail.mn-solutions.de>
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Date: Tue, 29 Sep 2009 16:04:06 +0200
Message-Id: <1254233047.30589.0.camel@johannes.local>
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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=20
> is always 1 in my driver.
>=20
> Is this a bug or a feature?

# iw wlan0 scan trigger passive

> However, scan_request->ssids[0].ssid_len is 0.
>=20
> So to ask my firmware for an SSID scan, I need to do=20
>=20
>  if (req->n_ssids && req->ssid[0].ssid_len)
>=20
> instead of simply
>=20
>  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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