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? > 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? johannes
