wpa_supplicant: Problem with freq_list scan filter

Janusz Dziedzic janusz.dziedzic at tieto.com
Fri Aug 8 03:23:28 EDT 2014


On 7 August 2014 16:05, Bojan Prtvar <bojan.prtvar at rt-rk.com> wrote:
> Hello,
>
> Background:
> We are using wpa_supplicant (v2.0-devel-4.2.2)on Android embedded device.
> We had a requirement to support only networks in 5GHz range. In order to
> support it, we back-ported [1] patch and added config option
> freq_list=5180 5200 5220 5240 5260 5280 5300 5320 5500 5520 5540 5560
> 5580 5600 5620 5640 5660 5680 5700
> After this, Android only reports networks from 5GHz range and everything
> seemed OK.
>
So, small change to android framework and adding
bssid=f8:d1:11:a6:1b:b0 to network block.
Should fix the issue.

> Problem statement:
> There is a problem in following scenario.
> We have two networks(same ssid,same password) one in 5GHz other in 2GHz
> range. We connect  device to supported 5GHz network, and then turn off
> that AP. After a while, device automatically connects to unwanted 2GHz
> network. Please find wpa_supplicant logs in [2].
> 5GHz AP is f8:d1:11:a6:1b:b0
> 2GHz AP is f8:d1:11:c4:4b:dc
>
> Could this be a wpa_supplicant issue or Android WiFi framework is to blame?
> Any help would be highly appreciated.
>
Seems like supplicant bug? Back to scan all freq?

BR
Janusz


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