On 25/06/2020 12:51, Johannes Berg wrote:
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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?
This is causing a situation where stations keep sending unicast frames
to a down AP interface as it doesn’t know it's gone down.
I tried your suggestion and sent 1 deauth/disassoc as broadcast
(instead of unicast to each STA), but some stations (e.g. Samsung S8)
Ignore this broadcast (while it will not ignore unicast deauth/disassoc).
Although not indicated in the standard, I think it's better to let STA
Know AP gone down by sending this unicast deauth to each STA
(as this patch does).
I'm not really sure. That's a _lot_ of frames and potentially quite a
long time. In the patch, as written, I'm not even convinced you can be
sure that they will all make it out to the air?
I agree, but what's the alternative?
Thanks,
Shay
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