bgscan: Deliver beacon loss event to bgscan modules

This adds a call to the notify_beacon_loss() callback functions when
beacon loss is detected. In addition, a new CTRL-EVENT-BEACON-LOSS event
is made available through the wpa_supplicant control interface.

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

src/common/wpa_ctrl.h

@@ -74,6 +74,8 @@ extern "C" {
 #define WPA_EVENT_NETWORK_NOT_FOUND "CTRL-EVENT-NETWORK-NOT-FOUND "
 /** Change in the signal level was reported by the driver */
 #define WPA_EVENT_SIGNAL_CHANGE "CTRL-EVENT-SIGNAL-CHANGE "
+/** Beacon loss reported by the driver */
+#define WPA_EVENT_BEACON_LOSS "CTRL-EVENT-BEACON-LOSS "
 /** Regulatory domain channel */
 #define WPA_EVENT_REGDOM_CHANGE "CTRL-EVENT-REGDOM-CHANGE "
 /** Channel switch (followed by freq=<MHz> and other channel parameters) */

wpa_supplicant/events.c

@@ -1,6 +1,6 @@
 /*
  * WPA Supplicant - Driver event processing
- * Copyright (c) 2003-2015, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2003-2017, Jouni Malinen <j@w1.fi>
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
@@ -4334,6 +4334,12 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
 			data->p2p_lo_stop.reason_code);
 #endif /* CONFIG_P2P */
 		break;
+	case EVENT_BEACON_LOSS:
+		if (!wpa_s->current_bss || !wpa_s->current_ssid)
+			break;
+		wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_BEACON_LOSS);
+		bgscan_notify_beacon_loss(wpa_s);
+		break;
 	default:
 		wpa_msg(wpa_s, MSG_INFO, "Unknown event %d", event);
 		break;