>>I am prism3 user. I used ieee80211_ioctl.c with WI_RID_SCAN_REQ. But no
>> scan result came.

>Are there active WiFi stations in the area?

When I use WI_RID_SCAN_APS, I could get scan result from a non WPA AP.
But WI_RID_SCAN_REQ doesn't return result from same AP.