code: def parse_vendor_ie(payload):
          
          output = {}
          oui = struct.unpack('BBB', payload[0:3])
          oui = b'-'.join([('%02x' % o).encode('ascii') for o in oui])
          oui_type = struct.unpack('B', payload[3:4])[0]
          oui_data = payload[4:]
          output['oui'] = oui.upper()
          output['oui_type'] = oui_type
          output['oui_data'] = oui_data
          return output
docs: parse vendor specific information element
          oui -> organizationally unique identifier
          first 3 bytes of mac addresses
          see:https://www.wireshark.org/tools/oui-lookup.html
          strip wlan_mgt.tag.oui(3 bytes),
          wlan_mgt.tag.vendor.oui.type(1 byte)
          wlan_mgt.tag.vendor.data (varies)
          :payload: ctypes.structure
          :return: dict
              {'oui':00-11-22, 'oui_type':1, 'oui_data':ctypes.structure}