code: def get_fixed_capabils(payload):
          
          if len(payload) != 2:
              return None
          capabils = {}
          fix_cap = struct.unpack('H', payload)[0]
          cap_bits = format(fix_cap, '016b')[::-1]
          capabils['ess'] = int(cap_bits[0])             # Extended Service Set
          capabils['ibss'] = int(cap_bits[1])            # Independent Basic Service Set
          capabils['priv'] = int(cap_bits[4])            # Privacy
          capabils['short_preamble'] = int(cap_bits[5])  # Short Preamble
          capabils['pbcc'] = int(cap_bits[6])            # Packet Binary Convolutional Code
          capabils['chan_agility'] = int(cap_bits[7])    # Channel Agility
          capabils['spec_man'] = int(cap_bits[8])        # Spectrum Management
          capabils['short_slot'] = int(cap_bits[10])     # Short Slot Time
          capabils['apsd'] = int(cap_bits[11])           # Automatic Power Save Delivery
          capabils['radio_meas'] = int(cap_bits[12])     # Radio Measurement
          capabils['dss_ofdm'] = int(cap_bits[13])       # Direct Spread Spectrum
          capabils['del_back'] = int(cap_bits[14])       # Delayed Block Acknowledgement
          capabils['imm_back'] = int(cap_bits[15])       # Immediate Block Acknowledgement
          return capabils
docs: strip(2 byte) wlan_mgt.fixed.capabilities
          :payload: ctypes.structure
              2 byte
          :return: dict
              None in error