Support for 802.11 Action frames about dpkt HOT 2 OPEN

import sys
from dpkt import pcap, pcapng
from dpkt.radiotap import Radiotap

if __name__ == '__main__':
    file = sys.argv[1]
    print(f"Reading pcap from {file}")
    with open(file, mode='rb') as f:
        if file.endswith('.pcapng'):
            reader = pcapng.Reader(f)
        else:
            reader = pcap.Reader(f)

        assert reader.datalink() == pcap.DLT_IEEE802_11_RADIO

        count = 0
        for _, buffer in reader:
            count += 1
            packet = Radiotap(buffer)
            packet.pprint()
    print(f"Read {count} packets")