On 11/28/12 8:57 AM, "Johannes Berg" [off-list ref] wrote:

quoted

quoted

BTW, is there any limitation to remain on channel commands, like will
they
work on AP ifaces, Ad-Hoc ifaces, MultiSSID in general, etc?

I hope not. There may be some practical issues with not all drivers
supporting this, but remain-on-channel is the mechanism we use for
supporting concurrent operations (e.g., P2P negotiations or GAS/ANQP)
and
making this work in all combinations would be important regardless.

FWIW, right now our plan for iwlwifi is to only really support it with
the P2P Device wdev, but I'm not sure what implications that has in
terms of support for GAS/ANQP etc. We might have to revisit that.

GAS/ANQP is pre-association if that makes any difference. Anyway, quite a
few new things will start depending on off channel Action frames and
everything I'm working on this area will most likely be using r-o-c..

Maybe we should start advertising where it's supported so wpa_s/hostapd
can disable/enable features appropriately?

Yeah, sounds reasonable. I guess you could also reject the r-o-c command,
but it is cleaner if this can be determined beforehand.

- Jouni