Re: [PATCHv3 2/2] mac80211: in AD-HOC mode wait for the AUTH response

[Nicolas Cavallari <Nicolas.Cavallari@lri.fr>]

On 31/01/2013 14:34, Johannes Berg wrote:
> That seems reasonable. Actually there's no reason for wpa_s to "reset
> the [...] sta_info", all it really has to do is set it to unauthorized
> if it detects it was rebooted, and then start key negotiation again, I
> think?

I'm not sure why Antonio resetted the sta_info. Not resetting it when a node reboot is
detected from userspace works for me anyway.

>> If we want a working node reboot detection with the current wpasupplicant, we need, in
>> IBSS mode, to only make the kernel send NEW_STA when a station is authenticated. There's
>> not much choice here.
>>
>> If it's acceptable to not have node reboot detection with current wpasupplicant, we could
>> make a future wpasupplicant add a flag saying it supports the new IBSS_STA event, and the
>> kernel would only do reboot detection in this case.
> 
> I think that's acceptable, but if it requires a wpa_s change anyway we
> could just implement reboot detection there instead of adding all these
> new events etc.? I.e. rather than having a new supplicant say "OK I will
> listen to the right event when handling reboot detection", it could just
> use the existing infrastructure and implement it itself?

Well i already have wpa_supplicant patches for that. Might just need to clean that up a
bit so it's at least configurable.

But now i'm reminded that transmitting management frames from userspace requires a
frequency. For wpasupp to be race-free during ibss merges, we should have a way to
transmit management frames to the current bss without specifying a frequency...

(Will once said he uses fixed-channel, so he is not affected)