RRM: Send Radio Measurement response when beacon report scan fails

When failing to trigger scan for beacon report (e.g., when the
requested duration is not supported by the driver), send a
Radio Measurement response with the mode set to refused and don't
retry the scan.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>

wpa_supplicant/rrm.c

@@ -870,7 +870,7 @@ static void wpas_beacon_rep_table(struct wpa_supplicant *wpa_s,
 }
 
 
-static void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s)
+void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s)
 {
 	if (!is_multicast_ether_addr(wpa_s->rrm.dst_addr)) {
 		struct wpabuf *buf = NULL;

wpa_supplicant/scan.c

@@ -200,7 +200,8 @@ static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
 	wpa_scan_free_params(params);
 	work->ctx = NULL;
 	if (ret) {
-		int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ;
+		int retry = wpa_s->last_scan_req != MANUAL_SCAN_REQ &&
+			!wpa_s->beacon_rep_data.token;
 
 		if (wpa_s->disconnected)
 			retry = 0;
@@ -222,6 +223,10 @@ static void wpas_trigger_scan_cb(struct wpa_radio_work *work, int deinit)
 			/* Clear the scan_res_handler */
 			wpa_s->scan_res_handler = NULL;
 		}
+
+		if (wpa_s->beacon_rep_data.token)
+			wpas_rrm_refuse_request(wpa_s);
+
 		return;
 	}
 

wpa_supplicant/wpa_supplicant_i.h

@@ -1317,6 +1317,7 @@ void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
 					      const u8 *src,
 					      const u8 *frame, size_t len,
 					      int rssi);
+void wpas_rrm_refuse_request(struct wpa_supplicant *wpa_s);
 int wpas_beacon_rep_scan_process(struct wpa_supplicant *wpa_s,
 				 struct wpa_scan_results *scan_res,
 				 struct scan_info *info);