hostapd: Only update already-set beacons when processing OLBC

When hostapd is about to start an AP using HT40, it starts a scan to
check whether it is allowed or not. If OLBC is detected before the
scan has completed, it sets the beacons prematurely.

To fix this, instead of setting all beacons when OLBC is detected,
only update the ones that have already been started.

Signed-off-by: Luciano Coelho <coelho@ti.com>

src/ap/ap_list.c

@@ -318,7 +318,7 @@ void ap_list_process_beacon(struct hostapd_iface *iface,
 #endif /* CONFIG_IEEE80211N */
 
 	if (set_beacon)
-		ieee802_11_set_beacons(iface);
+		ieee802_11_update_beacons(iface);
 }
 
 
@@ -373,7 +373,7 @@ static void ap_list_timer(void *eloop_ctx, void *timeout_ctx)
 	}
 
 	if (set_beacon)
-		ieee802_11_set_beacons(iface);
+		ieee802_11_update_beacons(iface);
 }
 
 

src/ap/beacon.c

@@ -700,4 +700,14 @@ void ieee802_11_set_beacons(struct hostapd_iface *iface)
 		ieee802_11_set_beacon(iface->bss[i]);
 }
 
+
+/* only update beacons if started */
+void ieee802_11_update_beacons(struct hostapd_iface *iface)
+{
+	size_t i;
+	for (i = 0; i < iface->num_bss; i++)
+		if (iface->bss[i]->beacon_set_done)
+			ieee802_11_set_beacon(iface->bss[i]);
+}
+
 #endif /* CONFIG_NATIVE_WINDOWS */

src/ap/beacon.h

@@ -22,5 +22,6 @@ void handle_probe_req(struct hostapd_data *hapd,
 		      const struct ieee80211_mgmt *mgmt, size_t len);
 void ieee802_11_set_beacon(struct hostapd_data *hapd);
 void ieee802_11_set_beacons(struct hostapd_iface *iface);
+void ieee802_11_update_beacons(struct hostapd_iface *iface);
 
 #endif /* BEACON_H */