Command equivalent in iw

Command equivalent in iw

[Larry Finger]

Someone using the rtlwifi code that is posted at GitHub wants to know the iw 
equivalent of "iwpriv wlan0 bandcfg" to limit the wireless interface to 802.11b, 
802.11g, or 802.11n. I only use simple iw commands, and I could not answer the 
question.

Thanks,

Larry

Re: Command equivalent in iw

[Emmanuel Grumbach]

On Thu, Jul 6, 2017 at 5:51 AM, Larry Finger <Larry.Finger@lwfinger.net> wrote:
>
> Someone using the rtlwifi code that is posted at GitHub wants to know the iw equivalent of "iwpriv wlan0 bandcfg" to limit the wireless interface to 802.11b, 802.11g, or 802.11n. I only use simple iw commands, and I could not answer the question.

This seems to be a private IOCTL and I can't find the code for that
handler in the kernel today. Even in wireless extensions..
I am not aware of something like this with iw today.

In iwlwifi we have module parameter for this since this should really
be used seldom.

Re: Command equivalent in iw

[Ben Greear]

On 07/06/2017 12:38 AM, Emmanuel Grumbach wrote:
> On Thu, Jul 6, 2017 at 5:51 AM, Larry Finger <Larry.Finger@lwfinger.net> wrote:
>>
>> Someone using the rtlwifi code that is posted at GitHub wants to know the iw equivalent of "iwpriv wlan0 bandcfg" to limit the wireless interface to 802.11b, 802.11g, or 802.11n. I only use simple iw commands, and I could not answer the question.
>
> This seems to be a private IOCTL and I can't find the code for that
> handler in the kernel today. Even in wireless extensions..
> I am not aware of something like this with iw today.
>
> In iwlwifi we have module parameter for this since this should really
> be used seldom.

I have some patches for wpa_supplicant and the wifi stack (and ath10k) that lets this work,
but it is fairly invasive, somewhat tricky to configure the supplicant properly,
and the kernel related patches were rejected some time back, so
it will only live in my trees for the foreseeable future.

If it is important to someone, they can find my kernels and hostapd and such here
and maybe google for past email from me about such things for hints:

https://github.com/greearb

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

Re: Command equivalent in iw

[Arend van Spriel]

On 06-07-17 16:36, Ben Greear wrote:
> 
> 
> On 07/06/2017 12:38 AM, Emmanuel Grumbach wrote:
>> On Thu, Jul 6, 2017 at 5:51 AM, Larry Finger
>> <Larry.Finger@lwfinger.net> wrote:
>>>
>>> Someone using the rtlwifi code that is posted at GitHub wants to know
>>> the iw equivalent of "iwpriv wlan0 bandcfg" to limit the wireless
>>> interface to 802.11b, 802.11g, or 802.11n. I only use simple iw
>>> commands, and I could not answer the question.
>>
>> This seems to be a private IOCTL and I can't find the code for that
>> handler in the kernel today. Even in wireless extensions..
>> I am not aware of something like this with iw today.
>>
>> In iwlwifi we have module parameter for this since this should really
>> be used seldom.
> 
> I have some patches for wpa_supplicant and the wifi stack (and ath10k)
> that lets this work,
> but it is fairly invasive, somewhat tricky to configure the supplicant
> properly,
> and the kernel related patches were rejected some time back, so
> it will only live in my trees for the foreseeable future.
> 
> If it is important to someone, they can find my kernels and hostapd and
> such here
> and maybe google for past email from me about such things for hints:
> 
> https://github.com/greearb

So what has been accepted in the kernel a while ago is to do the above
through devicetree configuration as it is considered a system use-case.
This was done by

commit e691ac2f75b69bee743f0370d79454ba4429b175
Author: Rafał Miłecki <rafal@milecki.pl>
Date:   Wed Jan 4 18:58:31 2017 +0100

    cfg80211: support ieee80211-freq-limit DT property

The DT property is handled by cfg80211 in net/wireless/of.c.

Regards,
Arend