I am trying to set an ssid using ifconfig as shown below. 

#ifconfig wlan0 ssid netgear

IOCTL which gets called in the driver is : SIOCS80211NWID

Using copyin I am trying to copy the contents as shown below. 

Something like below.
if (!copyin((((caddr_t) ifr)+ sizeof(struct ifreq)), &nwid, sizeof(struct ieee80211_nwid))){

When i dump the data, I only see wlan0 but the ssid name netgear. 

Can somebody help me out on this, why the driver does not receive the entire information ?

I have dumped the data up-to 1000 bytes, and I only see "wlan0".