Re: WPA and WPA2

[Johannes Berg <johannes@sipsolutions.net>]

Just a small correction:

On Wed, 2017-05-24 at 11:44 -0500, Dan Williams wrote:
> 
> For RSN, they are 1 = PMK, 2 = GMK, 3 = GMK2, 4 seems unused.

PTK and GTK, and in theory you could have more than two GTKs but that's
not usually done.

> Because WEXT is pretty convoluted, I woudn't necessarily try to
> translate what eg ks_wlan_set_encode_ext() is doing directly to
> cfg80211, but to understand how the firmware interface works and then
> just write the cfg80211 code to the firmware interface.
> 
> Basically, you have the following modes:
> 
> a) open, no encryption
> b) WEP encryption (4 possible WEP keys, each either 40 or 104 bits)
> c) WPA/RSN (PMK and GMK are computed by wpa_supplicant and supplied
> to you, just need to send to firmware)

Again, PTK/GTK :)

> And to answer Johannes, this firmware looks much more fullmac than
> softmac; BSS selection seems left up to the firmware.  You just send
> it a "connect with these parameters" command (HIF_INFRA_SET_REQ)
> including channels, SSID, BSSID, mode, etc and it does everything.

Yeah. Makes sense then.

johannes