Locating Group Client From Group Owner

[Padmanabha, Seshadri K.]

Hi Jouni,

Sorry about the confusion. Autonomous GO is beaconing and looking for potential GC. Group has not been formed yet. I wish to pick and ping the right candidate before group formation starts. Hope this clarifies.

Regards,
Sesh

-----Original Message-----
From: Jouni Malinen [mailto:j at w1.fi] 
Sent: Friday, February 05, 2016 2:38 PM
To: Padmanabha, Seshadri K.
Cc: hostap at lists.infradead.org
Subject: Re: Locating Group Client From Group Owner

On Thu, Feb 04, 2016 at 08:41:57PM +0000, Padmanabha, Seshadri K. wrote:
> I have an Autonomous GO running on a device with display and IO options. My group clients have displays without IO capability. 
> I wish to locate GC from GO by sending a message ( triggering an audible/visual action ). This trigger should not initiate any sought of connection handshake.
> 
> Based on state machine (https://w1.fi/wpa_supplicant/devel/p2p.html), I've tried to restrict myself to discovery state messages.
> Option 1 -
> run p2p_find on both sides and fire out  p2p_sd_request during this interval and wait for response. GC can use this as dummy trigger. This does not work consistently all the time. Is there a cleaner option or ways to improve reliability for stated option?

I'm not sure I understood the use case correctly.. Why would you look at the P2P state machine of SD if the peer devices are already in the group (which is how I interpret that use of "group client/GC" here)? Wouldn't it be simpler to just implement this as a normal Data frame to the association peer device and implement this completely independently of the P2P state machine and P2P Action frames.

-- 
Jouni Malinen                                            PGP id EFC895FA