hostapd: add ubus link-measurements notifications

Notify external ubus subscribers of received link-measurement reports.

Signed-off-by: David Bauer <mail@david-bauer.net>

package/network/services/hostapd/patches/600-ubus_support.patch

@@ -423,6 +423,16 @@
  }
  
  
+@@ -352,6 +355,9 @@ void hostapd_handle_radio_measurement(st
+ 		   mgmt->u.action.u.rrm.action, MAC2STR(mgmt->sa));
+ 
+ 	switch (mgmt->u.action.u.rrm.action) {
++	case WLAN_RRM_LINK_MEASUREMENT_REPORT:
++		hostapd_ubus_handle_link_measurement(hapd, buf, len);
++		break;
+ 	case WLAN_RRM_RADIO_MEASUREMENT_REPORT:
+ 		hostapd_handle_radio_msmt_report(hapd, buf, len);
+ 		break;
 --- a/src/ap/vlan_init.c
 +++ b/src/ap/vlan_init.c
 @@ -22,6 +22,7 @@

package/network/services/hostapd/src/src/ap/ubus.c

@@ -1412,6 +1412,34 @@ hostapd_rrm_lm_req(struct ubus_context *ctx, struct ubus_object *obj,
 }
 
 
+void hostapd_ubus_handle_link_measurement(struct hostapd_data *hapd, const u8 *data, size_t len)
+{
+	const struct ieee80211_mgmt *mgmt = (const struct ieee80211_mgmt *) data;
+	const u8 *pos, *end;
+	u8 token;
+
+	end = data + len;
+	token = mgmt->u.action.u.rrm.dialog_token;
+	pos = mgmt->u.action.u.rrm.variable;
+
+	if (end - pos < 8)
+		return;
+
+	if (!hapd->ubus.obj.has_subscribers)
+		return;
+
+	blob_buf_init(&b, 0);
+	blobmsg_add_macaddr(&b, "address", mgmt->sa);
+	blobmsg_add_u16(&b, "dialog-token", token);
+	blobmsg_add_u16(&b, "rx-antenna-id", pos[4]);
+	blobmsg_add_u16(&b, "tx-antenna-id", pos[5]);
+	blobmsg_add_u16(&b, "rcpi", pos[6]);
+	blobmsg_add_u16(&b, "rsni", pos[7]);
+
+	ubus_notify(ctx, &hapd->ubus.obj, "link-measurement-report", b.head, -1);
+}
+
+
 #ifdef CONFIG_WNM_AP
 
 static int

package/network/services/hostapd/src/src/ap/ubus.h

@@ -47,6 +47,7 @@ void hostapd_ubus_add_vlan(struct hostapd_data *hapd, struct hostapd_vlan *vlan)
 void hostapd_ubus_remove_vlan(struct hostapd_data *hapd, struct hostapd_vlan *vlan);
 
 int hostapd_ubus_handle_event(struct hostapd_data *hapd, struct hostapd_ubus_request *req);
+void hostapd_ubus_handle_link_measurement(struct hostapd_data *hapd, const u8 *data, size_t len);
 void hostapd_ubus_notify(struct hostapd_data *hapd, const char *type, const u8 *mac);
 void hostapd_ubus_notify_beacon_report(struct hostapd_data *hapd,
 				       const u8 *addr, u8 token, u8 rep_mode,
@@ -98,6 +99,10 @@ static inline int hostapd_ubus_handle_event(struct hostapd_data *hapd, struct ho
 	return 0;
 }
 
+static inline void hostapd_ubus_handle_link_measurement(struct hostapd_data *hapd, const u8 *data, size_t len)
+{
+}
+
 static inline void hostapd_ubus_notify(struct hostapd_data *hapd, const char *type, const u8 *mac)
 {
 }