Hi! I have the same problem with wpasuplicant and ndiswrapper. Renice
often works, but not every time and it is uncomfortable with
Networkmanager. So I searched in the source.
My conclusion: After the last handshake packet from the access point
has arrived, the computer sends its last packet and than sets the wpa
key. But at this time sending of the last handshake packet is still in
progress and setting the key disturbs this process. Inserting a pause
between this two actions solves the problem.
wpa.c:
void wpa_supplicant_process_3_of_4(..)
{
.
.
wpa_supplicant_send_4_of_4()
-> wpa_eapol_key_send()
-> wpa_sm_ether_send()
-> wpa_ether_send()
-> l2_packet_send()
-> sendto()
.
.
usleep(10);
.
.
wpa_supplicant_install_ptk()
-> wpa_sm_set_key()
-> wpa_driver_wext_set_key()
-> ioctl()
.
.
}
--
[ndiswrapper] [wg511] fails to associate
https://bugs.launchpad.net/bugs/207446
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