Virtual Interface for P2P operations

[Pavel Roskin]

On 07/13/2011 03:19 AM, Johannes Berg wrote:
> On Tue, 2011-07-12 at 18:55 -0700, Jithu Jance wrote:
>> Thanks Jouni for your feedback. Agree with your suggestion that using
>> primary mac address for sending Tx NL_CMD_FRAME looks ugly and is not
>> the correct way to do it. May be exposing a network interface for p2p
>> device address interface would be a better approach and should work
>> with current supplicant. I will try this way.  Thanks again for your
>> valuable suggestions and sorry for the trouble.
>
> I think the correct way to handle this, short of exposing a separate
> netdev, would be to expose new nl80211 "start p2p" and "stop p2p"
> operations that wpa_s could use. These might internally create a (maybe
> hidden) netdev to use with the right operations.
>
> Having the driver just expose an interface isn't really a good solution
> imho, since for example its lifetime wouldn't be controlled the right
> way.

Can we use socket options?  As long as the socket is open, the hidden 
netdev exists.  When the socket closes for whatever reason, the hidden 
netdev is removed.

This way, the socket is remains bound to a specific vif.  It just 
becomes a socket with special properties.

-- 
Regards,
Pavel Roskin