Firmware WIFI supplicant

[Mitch Bradley]

Here is what Lilian says about the WIFI supplicant support that is being 
added to the firmware:

The supplicant handles authentication with an AP.  The security modes 
supported currently are:

  1. no security
  2. WEP
  3. WPA-TKIP and WPA-AES
  4. WPA2-TKIP and WPA-AES

The supplicant expects a data structure, wifi-cfg, to contain 
information such as AP SSID, WEP key and its index (if the AP is in WEP 
mode), and WPA/WPA2 pairwise master key (if the AP is in WPA/WPA2 mode).

The supplicant scans the air and tries to locate the specified SSID.  If 
it is found, the supplicant gets the rest of the association information 
from the probe response, e.g., channel, security mode.  And when the 
supplicant verifies it is possible to continue with authentication with 
the AP, it starts the association and key handshaking process.