Do not use results from externally requested scan for network selection

It may not always be desirable to trigger reassociation or network
change based on scan results from externally to wpa_supplicant trigger
scan operations. Skip network selection and roaming determination if the
received scan result is known to be triggered by something external to
wpa_supplicant. The control interface SCAN command can be used to
request wpa_supplicant to determine the best network.

Signed-hostap: Jouni Malinen <j@w1.fi>

wpa_supplicant/events.c

@@ -1279,6 +1279,12 @@ static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
 
 	wpas_notify_scan_done(wpa_s, 1);
 
+	if (!wpa_s->own_scan_running && wpa_s->external_scan_running) {
+		wpa_dbg(wpa_s, MSG_DEBUG, "Do not use results from externally requested scan operation for network selection");
+		wpa_scan_results_free(scan_res);
+		return 0;
+	}
+
 	if (sme_proc_obss_scan(wpa_s) > 0) {
 		wpa_scan_results_free(scan_res);
 		return 0;