nl80211: Add DFS offload support using upstream nl80211 definitions

Add generic DFS offload support using the nl80211 feature that was
recently added to the mac80211-next tree. This uses the already
available DFS offload infrastructure that was previously used with
vendor specific definitions and just sets necessary flags (DFS_OFFLOAD
ext_feature) and forawrds CAC_STARTED event for processing.

Signed-off-by: Dmitry Lebed <lebed.dmitry@gmail.com>

src/drivers/driver_nl80211_capa.c

@@ -411,6 +411,10 @@ static void wiphy_info_ext_feature_flags(struct wiphy_info_data *info,
 	if (ext_feature_isset(ext_features, len,
 			      NL80211_EXT_FEATURE_MFP_OPTIONAL))
 		capa->flags |= WPA_DRIVER_FLAGS_MFP_OPTIONAL;
+
+	if (ext_feature_isset(ext_features, len,
+			      NL80211_EXT_FEATURE_DFS_OFFLOAD))
+		capa->flags |= WPA_DRIVER_FLAGS_DFS_OFFLOAD;
 }
 
 

src/drivers/driver_nl80211_event.c

@@ -1592,6 +1592,9 @@ static void nl80211_radar_event(struct wpa_driver_nl80211_data *drv,
 		wpa_supplicant_event(drv->ctx, EVENT_DFS_PRE_CAC_EXPIRED,
 				     &data);
 		break;
+	case NL80211_RADAR_CAC_STARTED:
+		wpa_supplicant_event(drv->ctx, EVENT_DFS_CAC_STARTED, &data);
+		break;
 	default:
 		wpa_printf(MSG_DEBUG, "nl80211: Unknown radar event %d "
 			   "received", event_type);