How to check if WEP authetication is failed in linux - linux-kernel

Question

If using the WEP security in open mode, then how can client running Linux kernel can check that Authentication is failed because of wrong key, but association was successful because it's an WEP open mode.

Answer 1

You will see this in wpa_supplican's log. It will look somehow like this (sorry, just random example I found in Internet):
[ 778.327092] wlan0: associated
[ 778.332503] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 788.334222] wlan0: disassociating from 00:1c:f0:b1:80:6a by local choice (reason=3)
[ 788.341433] cfg80211: Calling CRDA for country: US
[ 788.342348] wlan0: deauthenticating from 00:1c:f0:b1:80:6a by local choice (reason=3)
[ 789.122029] wlan0: no IPv6 routers present
[ 789.263341] wlan0: authenticate with 00:1c:f0:b1:80:6a (try 1)
[ 789.463049] wlan0: authenticate with 00:1c:f0:b1:80:6a (try 2)
[ 789.663048] wlan0: authenticate with 00:1c:f0:b1:80:6a (try 3)
[ 789.863057] wlan0: authentication with 00:1c:f0:b1:80:6a timed out
As you could see from the log above, client has been successfully associated (778.327092), but failed on the authentication stage (789.863057).
You could also use *wpa_cli* and its 'status' command:
> status
bssid=00:1c:f0:b1:80:6a
ssid=KLUK2
id=1
mode=station
pairwise_cipher=NONE
group_cipher=NONE
key_mgmt=IEEE 802.1X (no WPA)
wpa_state=ASSOCIATED
Supplicant PAE state=CONNECTING
suppPortStatus=Unauthorized
EAP state=IDLE
<2>Authentication with 00:1c:f0:b1:80:6a timed out.
> <2>CTRL-EVENT-DISCONNECTED bssid=00:00:00:00:00:00 reason=3
> <2>CTRL-EVENT-DISCONNECTED bssid=00:00:00:00:00:00 reason=3
> <2>CTRL-EVENT-SCAN-RESULTS
> <2>Trying to authenticate with 00:1c:f0:b1:80:6a (SSID='KLUK2' freq=2437 MHz)
<2>CTRL-EVENT-SCAN-RESULTS
<2>CTRL-EVENT-BSS-REMOVED 0 00:1d:19:cd:43:a1
> <2>CTRL-EVENT-BSS-REMOVED 1 00:24:fe:82:ea:d9
> <2>CTRL-EVENT-BSS-REMOVED 2 00:04:0e:8e:a7:fe
> <2>CTRL-EVENT-SCAN-RESULTS