wpa_supplicant: authentication timeout problem
jagadish.nadimpalli at oneconvergence.com
Wed Jun 20 06:55:10 EDT 2007
Our wireless client has atheros wireless card (madwifi-0.9.3 driver).
The deployment, scenario and the problem I am facing are explained below.
There are two access points in range of wireless client.
(1) AP-1, configured with ssid: helloworld, Security mode: WPA2, channel:6)
(2) AP-2, configured with ssid: helloworld, Security mode: WPA2,
Our wireless client has to roam from AP-1 to AP-2 with minimal delay (In
order of milli seconds).
The authentication timeouts in wpa_supplicant source code are set around
200ms. I ran wpa_supplicant at client side
and associated to AP-1. After successful association with AP-1, I
switched off AP-1. Now it disassociated with AP-1.
Now it has to associate with AP-2. But I am observing authentication
timeouts (failed to authenticate) for some times. After some iterations
it is able to associate with AP-2.
If I introduce one second delay after getting disassociation event (for
AP-1) from the driver, I am able to associate
with AP-2 immediately after one second delay without any authentication
I tried to introduce delay less than one second. Still I am getting
(1) Why authentication timeouts occurred without one second delay? Is
this delay required (for some unknown reasons like key clean-up e.t.c.)?
(2) Is this a problem in madwifi driver or wpa_supplicant?
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