[ath9k-devel] WPA/WPA2 problem with ath9k

[ath9k-devel] WPA/WPA2 problem with ath9k

[Tamas Selmeci]

Hello all!

On our hotspot apart from Samsung mobiles everything is ok until there's 
no security switched on.

As soon as WPA/WPA2 (or any combination of them including TKIP/CCMP) is 
switched on, connecting to the AP becomes extremely slow and fails 
several times. Once it gets connected seems to work perfectly, but I 
can't beleive that it should be that slow.

Environment:
- linux-2.6.27-rc6;
- ath9k-compat: 2009-01-25 and 2009-02-11;
- AR5416
- hostapd-0.6.7

hostapd.conf is as follows:

interface=wlan0
driver=nl80211
hw_mode=g
country_code=DE
max_num_sta=32
# supported_rates=10 20 55 110 60 90 120 180 240 360 480 540
# ht_capab=[HT40-][SHORT-GI-20][SHORT-GI-40]
logger_syslog=1
logger_syslog_level=0
logger_stdout=-1
logger_stdout_level=0
debug=1
ctrl_interface_group=0
macaddr_acl=0
auth_algs=1
dump_file=/tmp/hostapd.dump
ssid=norbolataska
wpa=2
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP CCMP
rsn_pairwise=TKIP CCMP
ap_max_inactivity=120
wpa_psk=af8f7d04a3331126ee9fad0cf2dbba54728389d93d83ca1549dfda2727249890
channel=8

Do you have any idea what can be wrong? I heard that AR5416 is a rather 
buggy card, many of the bugs have been fixed in AR9160, but that's also 
problematic according to my experiences. Adding "ieee80211n=1" didn't 
solve the problem.

Regards,
-- 
Tamas Selmeci

[ath9k-devel] WPA/WPA2 problem with ath9k

[Luis R. Rodriguez]

On Fri, Feb 13, 2009 at 02:51:05AM -0800, Tamas Selmeci wrote:
> Hello all!
> 
> On our hotspot apart from Samsung mobiles everything is ok until there's
> no security switched on.
> 
> As soon as WPA/WPA2 (or any combination of them including TKIP/CCMP) is
> switched on, connecting to the AP becomes extremely slow and fails
> several times. Once it gets connected seems to work perfectly, but I
> can't beleive that it should be that slow.
> 
> Environment:
> - linux-2.6.27-rc6;
> - ath9k-compat: 2009-01-25 and 2009-02-11;
> - AR5416
> - hostapd-0.6.7
> 
> hostapd.conf is as follows:
> 
> interface=wlan0
> driver=nl80211
> hw_mode=g
> country_code=DE
> max_num_sta=32
> # supported_rates=10 20 55 110 60 90 120 180 240 360 480 540
> # ht_capab=[HT40-][SHORT-GI-20][SHORT-GI-40]
> logger_syslog=1
> logger_syslog_level=0
> logger_stdout=-1
> logger_stdout_level=0
> debug=1
> ctrl_interface_group=0
> macaddr_acl=0
> auth_algs=1
> dump_file=/tmp/hostapd.dump
> ssid=norbolataska
> wpa=2
> wpa_key_mgmt=WPA-PSK
> wpa_pairwise=TKIP CCMP
> rsn_pairwise=TKIP CCMP

Remove TKIP, 11n and TKIP are not friends. I forget the details but I think
the spec doesn't allow for it.

  Luis

[ath9k-devel] WPA/WPA2 problem with ath9k

[Tamas Selmeci]

Hello Luis!

Luis R. Rodriguez wrote:

[...]
>> wpa_pairwise=TKIP CCMP
>> rsn_pairwise=TKIP CCMP
> 
> Remove TKIP, 11n and TKIP are not friends. I forget the details but I think
> the spec doesn't allow for it.

Many thanks! This seems to solve my problem, without TKIP in WPA mode 
the clients connect seamlessly. By the way, I ask our tester to perform 
another thorough test with many clients...

Best regards,
-- 
Tamas Selmeci
R&D Engineer