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Re: [RFCv1] mac80211: Adds Software / Virtual AMP 80211

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Hi Johannes,

On Tue, Apr 10, 2012 at 02:24:58PM -0700, Johannes Berg wrote:
> On 4/10/2012 2:20 PM, Johannes Berg wrote:
> >>>I don't get this patch at all. Why am I reviewing some very very basic
> >>>skeleton code when we should be discussing userspace APIs (we have
> >>>already discussed them with a few people years ago), how the AMP is
> >>>going to be managed, how the security handshake is going to work, etc.
> >>
> >>adding AMP (meaning Bluetooth Alternate MAC/PHY in case anybody cares)
> >>for SoftMac WiFi cards should be done solely in kernel space between
> >>Bluetooth core and mac80211. All the FullMac cards will expose the HCI
> >>AMP directly via the Bluetooth core. See Marvell solution for example.
> >>
> >>If we require a userspace interaction, I think we are doing something
> >>wrong here. And as far as I can tell, the only tricky part is the WPA2
> >>PSK 4-way handshake. We would need a kernel implementation for that.
> >
> >You already know I disagree, I don't want this code re-implemented in
> >kernel space when adding a few tightly controlled APIs is all it needs
> >to use an existing implementation of the relevant mechanisms.
> 
> There are also additional complexities like wpa_supplicant having to
> know whether to set up/tear down a BT AMP interface for P2P
> concurrency etc.,

I am new to the wireless code but can new virtual interface separate those
interfaces? They can have different MAC addresses and you can run
wpa_supplicant for each virtual interface separately.

Best regards 
Andrei Emeltchenko 

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