Group key renewal problem

Jouni Malinen jkmaline at cc.hut.fi
Sat Mar 11 15:23:19 EST 2006


On Sat, Mar 11, 2006 at 07:07:28PM +0100, Henrik Brix Andersen wrote:

> After the upgrade, my clients are disconnected at each group key
> renewal, with the following messages spewed in the system log
> (hostap-0.4.7 client):
> 
> Mar 11 18:58:48 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68

> (ipw2200-1.1.1 client):
> 
> Mar 11 19:00:48 fangorn CCMP: received packet without ExtIV flag from 00:02:6f:37:fc:68

Is that 00:02:6f:37:fc:68 the MAC address of your AP? If yes, it sounds
like the AP starts using incorrect encryption for broadcast/multicast
packets (WEP?) after rekeying. You could verify what kind of encryption
the AP is using by looking at /proc/net/hostap/wlan0/crypt before and
after rekeying.

-- 
Jouni Malinen                                            PGP id EFC895FA



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