wpa_supplicant_req_scan
wpa_supplicant_req_scan(wpa_s, 0, 0);
void wpa_supplicant_req_scan(struct wpa_supplicant *, int, int);
wpa_supplicant_req_scan(wpa_s, 0, 0);
wpa_supplicant_req_scan(wpa_s, 5, 0); /* wait 5 seconds */
wpa_supplicant_req_scan(wpa_s, 0, 100000);
wpa_supplicant_req_scan(wpa_s, 0, 100000);