Connection/disconnection problems with wpa_supplicant and hostapd when using WPA2 encryption

Adrien Decostre ad.decostre at gmail.com
Mon Jan 23 06:39:20 EST 2012


Dear all,


I am currently doing some tests with wpa_supplicant and hostapd and I
am facing a quite strange connection/disconnection problem when using
WPA2.
When the WiFi client (using wpa_supplicant) tries to associate to the
AP (managed by hostapd) is several times disconnected from the network
before finally receiving an IP address and finally being able to
transmit data.

Apparently, the client is 1st correctly associated (message “State:
ASSOCIATING -> ASSOCIATED” visible in the wpa_supplicant log) but the
client is soon after disconnected due to authentication problem with
the following error message:

WPA: drop TX EAPOL in non-IEEE 802.1X mode (type=1 len=0)
Authentication with 00:0e:8e:3b:05:6d timed out.
BSSID 00:0e:8e:3b:05:6d blacklist count incremented to 2
wpa_driver_wext_disassociate
No keys have been configured - skip key clearing
State: ASSOCIATED -> DISCONNECTED.



After this the client restarts the association/authentication
procedure and after a few tries the authentication succeed. The SSID
of the base was well broadcasted during the above described test.
Up to now, I have never seen this problem when connecting without
authentication.
I can connect without problem with Windows PC with WPA2 enabled, so I
would suspect that the AP is correctly configured.

Would anyone know the reason for this “connection/disconnection” problem?
Would this be a known issue or is it related to incorrect
configuration of hostapd or wpa_supplicant (relevant part of the
config files are given below)?

Thanks in advance for any help.

Best regards


Adrien


Wpa_supplicant config file:
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=root
network={
        ssid=**********************
        proto=RSN
        key_mgmt=WPA-PSK
        pairwise=CCMP
        psk=26ec2d449940baabfedadc640589fb0a1ee5d0ebb9dd8e02f7e2345d1318b244
        priority=20
}

Hostapd config file related to WPA2:
…

##### WPA/IEEE 802.11i configuration
wpa=2 #for WPA2 encryption
wpa_pairwise=CCMP
rsn_pairwise=CCMP

wpa_passphrase=clickshare
wpa_key_mgmt=WPA-PSK
wpa_group_rekey=6000
wpa_strict_rekey=1
…


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