[ath9k-devel] Can't associate with a particular AP

[kang haiyang <hykang@dongniannetworks.com>]

from the failed wireshark log, i saw there is inconsistent information 
in reassociation response:
in capability tag: ap tells client that it supports 40Mhz, but in the HT 
info tags it tells client that it only support 20Mhz.

i don't know if this maybe bother some particular clients.

Best Regards,
kang haiyang


On 10/23/2011 10:25 PM, Julien Valroff wrote:
> Hi,
>
> Le dimanche 16 oct. 2011 ? 17:31:44 (+0200 CEST), Adrian Chadd a ?crit :
>> Can you please grab a third device and grab a dump of the actual
>> probe/association frames?
>>
>> I think it'd be helpful to see what's changed.
> I have tried and captured the association process from my 2 other laptops
> using wireshark, but unfortunately, I am unable to capture packets in
> monitoring mode: in Wireshark, the box is not greyed out, but I cannot tick
> it.
>
> I've tried reading the Wireshark documentation on this point, but I could
> not see anything about this problem.
>
> I have followed Peter's instructions and the ones described in [0] both
> with the same results.
>
> But still, I have been able to capture something from the problematic
> laptop, you will find the wireshark logs attached.
>
> When failing to associate, I can see a lot of lines as follows:
> 50	11.081661	ba:f4:8a:c6:c8:44 (TA)	74:2f:68:57:2c:dc (RA)	802.11	46	Request-to-send, Flags=........C
>
> followed by:
> 166	23.082827	ba:f4:8a:c6:c8:44	74:2f:68:57:2c:dc	802.11	56	Deauthentication, SN=1142, FN=0, Flags=........C
>
> where:
> ba:f4:8a:c6:c8:44 is my AP
> 74:2f:68:57:2c:dc is my Atheros wlan NIC
>
> When the association succeeds, I notice the MAC address of the AP changes:
> 99	5.752088	c6:6e:27:a6:be:a4	74:2f:68:57:2c:dc	802.11	272	Probe Response, SN=269, FN=0, Flags=........C, BI=100, SSID=Kirya
>                        ^^^^
>
> Which is confirmed by iwlist scan.
> Before the association:
> Cell 01 - Address: BA:F4:8A:C6:C8:44
>          Channel:3
>          Frequency:2.422 GHz (Channel 3)
>          Quality=26/70  Signal level=-84 dBm
>          Encryption key:on
>          ESSID:"Kirya"
>
> After the succeeded association:
> Cell 04 - Address: C6:6E:27:A6:BE:A4
>          Channel:3
>          Frequency:2.422 GHz (Channel 3)
>          Quality=70/70  Signal level=-35 dBm
>          Encryption key:on
>          ESSID:"Kirya"
>
> How is this possible?
>
> Please continue and CC me as I am not subscribed to the list.
>
> Cheers,
> Julien
>
> [0] http://wiki.wireshark.org/CaptureSetup/WLAN#Linux
>
>
>
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