What is the ieee80211_scanner variable?

[Adrian Chadd]

hi,

I replied on iRC but, for reference.

The scanner array here is the per-mode scanner (AP, STA, etc.) that
implements how you should do channel scanning and selection. It's set by
net80211 by default and you normally don't need to go change it.



-adrian


On Sat, 28 Jul 2018 at 17:13, Farhan Khan <khanzf at gmail.com> wrote:

> Hi all,
>
> What is "ieee80211_scanner *scanners", as defined in ieee80211_scan.c
> and how is it set?
>
> I am trying to figure out why my driver does not produce any results
> when I run "ifconfig wlan0 scan". I traced the ioctl that ifconfig(8)
> sends up to ieee80211_start_scan(). Here it will run
> ieee80211_scanner_get(), which appears to check if the "scanners"
> variable is set to not-NULL, and if so, return that value. Back in
> ieee80211_start_scan() if the value is NULL, it will return 0. The
> surrounding debug printf message suggests that this means the card is
> not able to scan.
>
> Where is this value set? What is it? It seems to be defined within
> net80211(4) and not at the driver-level?
> Am I missing something? Please explain.
>
> Thanks,
>
> --
> Farhan Khan
> PGP Fingerprint: B28D 2726 E2BC A97E 3854 5ABE 9A9F 00BC D525 16EE
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