MLME-MICHAELMICFAILURE problem madwifi<->hostapd

Queisser, Andrew VfB Stuttgart '07!! andrew.queisser
Mon Jun 4 08:39:24 PDT 2007

> On Fri, Jun 01, 2007 at 08:45:20PM -0000, Queisser, Andrew 
> (VfB Stuttgart '07!!) wrote:
> > I think there's a madwifi bug when running hostapd regarding the 
> > custom wireless event MLME-MICHAELMICFAILURE. It appears 
> that madwifi 
> > should be sending the source address as part of this event and is 
> > instead sending the destination address. This happens in 
> > ieee80211_linux.c of madwifi so I reported this to the 
> madwifi developers list.
> Yes, I noticed a change to madwifi repository that fixed this 
> couple of minutes ago. Though, I think the fix was incorrect, 
> but at least the source address part should now be correct.
> > I'd be interested if anyone has seen TKIP countermeasures 
> with madwifi 
> > working in hostapd at all since it seems like it would 
> never work due 
> > to hostapd disregarding the MIC failure notifications from madwifi.
> I've never tested this with madwifi, but I would have assumed 
> that someone has since this is part of Wi-Fi certification 
> requirements..
> -- 
> Jouni Malinen                                            PGP 
> id EFC895FA

I've tested the updated madwifi driver and now I correctly
see the TKIP countermeasures starting in hostapd when I send 
bad packets.

Just out of curiosity, Jouni, what do you think is incorrect
about the fix?


More information about the Hostap mailing list