ADD_PRESENT_ELEM
#define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id))
ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY);
ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS);
ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY);
ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY);