Wireless extensions

modulename: wext.ko

configname: CONFIG_WIRELESS_EXT

Linux Kernel Configuration
└─>Networking support
└─>Wireless
└─>Wireless extensions
In linux kernel since version 2.6.17 (release Date: 2006-06-17)  
This option enables the legacy wireless extensions
(wireless network interface configuration via ioctls.)

Wireless extensions will be replaced by cfg80211 and
will be required only by legacy drivers that implement
wireless extension handlers. This option does not
affect the wireless-extension backward compatibility
code in cfg80211.

Say N (if you can) unless you know you need wireless
extensions for external modules.

source code: