XP sends "deauthentication" after ieee802_1x authentication finishs

[yuannong at emobilenetworks.com]

Hi,

I encontered a very strange problem with following setting:

 Hostap driver 0.2.4, Linux2.4, and WindowsXP as a client. The problem comes
when I turn on i802.1x authentication by using freeradius. The authentication method
is PEAP.

 In fact everything works pretty well. The i802.1x authentication works fine,
but several seconds after the i802.1x authentication finishs, XP always sends
out a ieee802.11 "deauthentication" frame with reason code 3:(Station has left
the basic service area..)

last part of the log looks:
IEEE 802.1X: 00:09:5b:69:64:e7 BE_AUTH entering state SUCCESS
IEEE 802.1X: Sending EAP Packet to 00:09:5b:69:64:e7 (identifier 9)
IEEE 802.1X: 00:09:5b:69:64:e7 REAUTH_TIMER entering state INITIALIZE
IEEE 802.1X: 00:09:5b:69:64:e7 AUTH_PAE entering state AUTHENTICATED
wlan0: STA 00:09:5b:69:64:e7 IEEE 802.1X: authenticated
IEEE 802.1X: 00:09:5b:69:64:e7 BE_AUTH entering state IDLE
Received 40 bytes management frame
RX frame - hexdump(len=40): 0a 02 d5 00 00 09 5b 69 64 e7 00 09 5b 2f 96 b2 00
09 5b 2f 96 b2 20 77 aa aa 03 00 00 00 88 8e 01 00 00 04 03 09 00 04
DATA (TX callback) ACK
IEEE 802.1X: 00:09:5b:69:64:e7 TX status - version=1 type=0 length=4 - ack=1
IEEE 802.1X: 00:09:5b:69:64:e7 Port Timers TICK (timers: 29 0 3599 29)
IEEE 802.1X: 00:09:5b:69:64:e7 Port Timers TICK (timers: 28 0 3598 28)
IEEE 802.1X: 00:09:5b:69:64:e7 Port Timers TICK (timers: 27 0 3597 27)
IEEE 802.1X: 00:09:5b:69:64:e7 Port Timers TICK (timers: 26 0 3596 26)
IEEE 802.1X: 00:09:5b:69:64:e7 Port Timers TICK (timers: 25 0 3595 25)
Received 26 bytes management frame
RX frame - hexdump(len=26): c0 00 11 93 00 09 5b 2f 96 b2 00 09 5b 69 64 e7 cb
3d 55 5d 5e 43 f0 ba 03 00
MGMT
MGMT: BSSID=cb:3d:55:5d:5e:43 not our address
IEEE 802.1X: 00:09:5b:69:64:e7 Port Timers TICK (timers: 24 0 3594 2

Is this an XP problem, or AP problem?

-yuannong