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Re: [PATCH] mac80211: Send deauth to STA's upon AP stop

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On 30/07/2020 17:00, Johannes Berg wrote:
> External Email
>
>
> On Thu, 2020-06-25 at 13:29 +0300, Shay Bar wrote:
>> On 25/06/2020 12:51, Johannes Berg wrote:
>>> External Email
>>>
>>>
>>> On Sun, 2020-06-21 at 10:12 +0000, Shay Bar wrote:
>>>> Hi Johannes and Ben,
>>>>
>>>> To conclude this thread, hostapd doesn’t send any deauth/disassoc
>>>> upon AP stop (when hostapd is killed _or_ when "ifconfig down" the
>>>> AP interface).
>>> Right. I'm sort of suggesting you just shouldn't be doing this, and it
>>> doesn't seem like most people actually do, otherwise we'd have seen this
>>> issue before?
>>>
>> I shouldn't kill hostapd? Isn't this a very basic action?
>> What is the alternative for stopping the AP?
> I guess I would say to use hostapd_cli first to "disable" the
> interfaces?

Indeed, using hostapd_cli "DISABLE" will call hostapd_flush_old_stations() that will send broadcast deauth.
The problem is (mentioned before) that some stations (e.g. Samsung S8) ignore this broadcast (while it will not ignore unicast deauth/disassoc).

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