Connection breaks while using bittorrent

Wed Apr 26 02:35:02 PDT 2006

Hallo there,

I'm rather unexperienced with wpa_supplicant - using it for two days now.

My setup is as follows:
Access point is a "AVM Fritz!Box Fon 7050" (running linux, don't know much 
about it), WPA (1) encryption.
On the client side, I'm using a Centrino 2 notebook with ipw3945 chipset and 
the latest driver + wpa_supplicant 0.5.2.
I have been using this driver and the access point for some weeks with WEP128 
(and without wpa_supplicant) without any problems (although I didn't use 
bittorrent during that time, I'll try this later).

Now that I put WPA encryption (and therefore wpa_supplicant) into place, I 
experience sudden connection breaks while using bittorrent. I didn't notice 
any problems until today, when I wanted to download a file via Azureus (a 
Java bittorrent client).

Sorry, I just don't know where to look at, so I'll post some logs... I found 
the following in dmesg:

...
TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
N/A: Michael MIC verification failed for MSDU from 00:04:0e:7e:7a:58 keyidx=0
wlan: MSDU decryption/MIC verification failed (SA=00:04:0e:7e:7a:58 keyidx=0)
TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
N/A: Michael MIC verification failed for MSDU from 00:04:0e:7e:7a:58 keyidx=0
wlan: MSDU decryption/MIC verification failed (SA=00:04:0e:7e:7a:58 keyidx=0)
TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
N/A: Michael MIC verification failed for MSDU from 00:04:0e:7e:7a:58 keyidx=0
wlan: MSDU decryption/MIC verification failed (SA=00:04:0e:7e:7a:58 keyidx=0)
TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
TKIP: ICV error detected: STA=00:04:0e:7e:7a:58
...

and this pattern repeated. As soon as I shutdown Azureus, it's over, and the 
connection is stable again.

The wpa_cli says the following (while running azureus):

...
<2>CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
<2>Trying to associate with 00:04:0e:7e:7a:58 (SSID='something' freq=0 MHz)
<1>Cancelling scan request
<1>WPA: using IEEE 802.11i/D3.0
<1>WPA: using GTK TKIP
<1>WPA: using PTK TKIP
<1>WPA: using KEY_MGMT WPA-PSK
<1>Setting authentication timeout: 10 sec 0 usec
<2>CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
<2>Authentication with 00:00:00:00:00:00 timed out.
<1>Setting scan request: 0 sec 0 usec
<2>Trying to associate with 00:04:0e:7e:7a:58 (SSID='something' freq=0 MHz)
<1>Cancelling scan request
<1>WPA: using IEEE 802.11i/D3.0
<1>WPA: using GTK TKIP
<1>WPA: using PTK TKIP
<1>WPA: using KEY_MGMT WPA-PSK
<1>Setting authentication timeout: 10 sec 0 usec
<2>CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
<2>Authentication with 00:00:00:00:00:00 timed out.
<1>Setting scan request: 0 sec 0 usec
<2>Trying to associate with 00:04:0e:7e:7a:58 (SSID='something' freq=0 MHz)
<1>Cancelling scan request
<1>WPA: using IEEE 802.11i/D3.0
<1>WPA: using GTK TKIP
<1>WPA: using PTK TKIP
<1>WPA: using KEY_MGMT WPA-PSK
<1>Setting authentication timeout: 10 sec 0 usec
<2>CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
<2>Authentication with 00:00:00:00:00:00 timed out.
<1>Setting scan request: 0 sec 0 usec
<2>Trying to associate with 00:04:0e:7e:7a:58 (SSID='something' freq=0 MHz)
<1>Cancelling scan request
<1>WPA: using IEEE 802.11i/D3.0
<1>WPA: using GTK TKIP
<1>WPA: using PTK TKIP
<1>WPA: using KEY_MGMT WPA-PSK
<1>Setting authentication timeout: 10 sec 0 usec
<2>CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
<2>Authentication with 00:00:00:00:00:00 timed out.
<1>Setting scan request: 0 sec 0 usec
<2>Trying to associate with 00:04:0e:7e:7a:58 (SSID='something' freq=0 MHz)
<1>Cancelling scan request
<1>WPA: using IEEE 802.11i/D3.0
<1>WPA: using GTK TKIP
<1>WPA: using PTK TKIP
<1>WPA: using KEY_MGMT WPA-PSK
<1>Setting authentication timeout: 10 sec 0 usec
<2>CTRL-EVENT-DISCONNECTED - Disconnect event - remove keys
<2>Authentication with 00:00:00:00:00:00 timed out.
<1>Setting scan request: 0 sec 0 usec
<2>Trying to associate with 00:04:0e:7e:7a:58 (SSID='something' freq=0 MHz)
<1>Cancelling scan request
<1>WPA: using IEEE 802.11i/D3.0
<1>WPA: using GTK TKIP
<1>WPA: using PTK TKIP
<1>WPA: using KEY_MGMT WPA-PSK
<1>Setting authentication timeout: 10 sec 0 usec
<1>Associated to a new BSS: BSSID=00:04:0e:7e:7a:58
<2>Associated with 00:04:0e:7e:7a:58
<1>Setting authentication timeout: 10 sec 0 usec
<1>Setting authentication timeout: 10 sec 0 usec
<2>WPA: Key negotiation completed with 00:04:0e:7e:7a:58 [PTK=TKIP GTK=TKIP]
<1>Cancelling authentication timeout
<2>CTRL-EVENT-CONNECTED - Connection to 00:04:0e:7e:7a:58 completed (reauth)
...

The access point has some kind of log which says the following:

26.04.06 11:05:32 WLAN-Station angemeldet.
26.04.06 11:04:23 WLAN-Station abgemeldet.
26.04.06 11:03:57 WLAN-Station angemeldet.
26.04.06 11:02:48 WLAN-Station abgemeldet.
26.04.06 11:01:05 WLAN-Station angemeldet.
26.04.06 10:59:58 WLAN-Station abgemeldet.
26.04.06 10:58:19 WLAN-Station angemeldet.
26.04.06 10:57:11 WLAN-Station abgemeldet.
26.04.06 10:53:14 WLAN-Station angemeldet.
26.04.06 10:52:06 WLAN-Station abgemeldet.
26.04.06 10:50:11 WLAN-Station angemeldet.
26.04.06 10:49:02 WLAN-Station abgemeldet.
...

"angemeldet" = "logged on"
"abgemeldet" = "logged off"

Please tell me what else information could be useful, and I'll supply it.

Regards, Patrick.

-- 
Key ID: 0x86E346D4
Fingerprint: 7745 E1BE FA8B FBAD 76AB 2BFC C981 E686 86E3 46D4
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