iwlist scan output incorrect?

[Vitorio Okio]

On Mon, 17 Mar 2008 17:51:44 -0600, jim barnes wrote:

> On Monday 17 March 2008 15:10:40 Vitorio Okio wrote:
>> Yes the settings are in nvram.  Here is the output:
>>
>> ~#nvram show | grep aes
>> wl_crypto=aes
>> wl0_wds0=*,auto,aes,psk2,MyESSID,This_Is_My_Passphrase wl0_crypto=aes
> 
> Gosh, at this point I think a second opinion from a third party is in
> order... Preferably one with a different wireless card, who can verify
> the output of iwlist ethx scanning (or equivalent?).
> 
> I'm siding with the router config!

Well, considering the following I think the problem is either in 'iwlist' 
or in my card reporting to 'iwlist' incorrectly.

Again, here is my DD-WRT router nvram:

~ # nvram show | grep aes
wl_crypto=aes
wl0_wds0=*,auto,aes,psk2,MySSID,xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx
wl0_crypto=ae

Here is output of 'sudo iwlist eth1 wpakeys':

user at hostname:~$ sudo iwlist eth1 wpakeys
eth1      2 key sizes : 40, 104bits
          4 keys available :
                [1]: xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx (128 bits)
                     Address: 00:00:00:00:00:00
                     Algorithm: CCMP                 Flags: 0x00000001
                        tx-seq-valid
                [2]: xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx (128 bits)
                     Address: 00:00:00:00:00:00
                     Algorithm: CCMP                 Flags: 0x00000001
                        tx-seq-valid
                [3]: xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx-xxxx (128 bits)
                     Address: 00:00:00:00:00:00
                     Algorithm: CCMP                 Flags: 0x00000001
                        tx-seq-valid
Error reading wpa keys (SIOCGIWENCODEEXT): Invalid argument
          Current Transmit Key: [1]

And here is output of 'sudo iwlist eth1 genie':

user at hostname:~$ sudo iwlist eth1 genie
eth1    
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK

You can clearly see that the last 2 iwlist outputs are in complete 
contradiction each with other (note CCMP vs TKIP reported).

In addition I had this rendig:

user at hostname:~$ sudo lsmod | grep aes
aes                    28608  3

While both these rending nothing:

user at hostname:~$ sudo lsmod | grep ieee80211_crypt_tkip.ko
user at hostname:~$ sudo lsmod | grep ieee80211_crypt_tkip

That is, the only encryption related module loaded while I'm connected is 
'aes' module.

Thus I'm quite positive now that I'm connecting using WPA2-PSK/AES. And 
the problem is as stated above: either in iwlist or in bcm43xx reporting 
incorrectly. Actually this line in the iwlist output above probably 
supports the last suggested:

"Error reading wpa keys (SIOCGIWENCODEEXT): Invalid argument"