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Re: Pondering: how to improve mac80211 roaming ...

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On Thu, Aug 14, 2008 at 10:05:27AM +0300, Kalle Valo wrote:

> What about PMKSA caching? Shouldn't user space need to provide PMKIDs
> (or the IEs) to mac80211 before association?

There are two possible designs for this. In wpa_supplicant terms,
ap_scan=2 would most likely mean that driver is responsible for
generating the RSN IE, including PMKID list, and wpa_supplicant is
providing the driver a list of currently available PMKs (PMKIDs for
them). In ap_scan=1, there is option for the driver to use the RSN IE
from wpa_supplicant (which is something that mac80211 is doing at the
moment) and in that case, yes, PMKIDs would indeed need to be updated
in the RSN IE just before association.
 
-- 
Jouni Malinen                                            PGP id EFC895FA
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