+static void wpas_mbo_send_wnm_notification(struct wpa_supplicant *wpa_s)
+{
+ struct wpabuf *buf;
+ int res;
+
+ /*
+ * Send WNM-Notification Request frame only in case of a change in
+ * non-preferred channels list during association, if the AP supports
+ * MBO.
+ */
+ if (wpa_s->wpa_state != WPA_COMPLETED || !wpa_s->current_bss ||
+ !wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE))
+ return;
+
+ buf = wpabuf_alloc(512);
+ if (!buf)
+ return;
+
+ wpabuf_put_u8(buf, WLAN_ACTION_WNM);
+ wpabuf_put_u8(buf, WNM_NOTIFICATION_REQ);
+ wpa_s->mbo_wnm_token++;
+ if (wpa_s->mbo_wnm_token == 0)
+ wpa_s->mbo_wnm_token++;
+ wpabuf_put_u8(buf, wpa_s->mbo_wnm_token);
+ wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC); /* Type */
+
+ wpas_mbo_non_pref_chan_attrs(wpa_s, buf, 1);
+
+ res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
+ wpa_s->own_addr, wpa_s->bssid,
+ wpabuf_head(buf), wpabuf_len(buf), 0);
+ if (res < 0)
+ wpa_printf(MSG_DEBUG,
+ "Failed to send WNM-Notification Request frame with non-preferred channel list");
+
+ wpabuf_free(buf);
+}
+
+