Hostapd Multicast Group Key Issue on PowerPC vs x86

[Damon Southworth]

Jouni Malinen wrote:

>> The problem is related to the group key as when the connection is
>> authenticated multicast messages come straight through on the x86 box
>> but do not come through on the PowerPC box until a group key re-key
>> takes place which is 600 seconds by default. A dirty workaround would be
>> to drop the group re-key time but there is still a delay and the side
>> affect of constant group re-keying.
> 
> This could have something to do with the byte order of the RSC in the
> initial group keys. Are you using WPA or WPA2? TKIP or CCMP?

Hostapd is configured for WPA (wpa=1). I have left the selection of
TKIP/CCMP unspecified (default). The client can also select either. In
this configuration I suppose I would expect it to select TKIP which does
appear to be the case.

> 
> I would like to see both the configuration and detailed debug logs to
> see whether there is anything visible there as far as configuring the
> GTK is concerned.

Attached.

> 
>> Recent versions of the main components were used:
>> 	Hostapd 0.6.9
>> 	Wpasupplicant 0.6.4
>> 	madwifi 0.9.4
>> 	kernel 2.6.28.8
> 
> Is the same kernel/driver used for both the AP and client? Is PowerPC
> used only in the AP and client is x86?
> 

Clients are always x86 and use the same kernel and Madwifi drivers. It
is only the AP which is changing between PowerPC and x86.




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