pcapfile/protocols/linklayer/wifi.py
def strip_mcs(self, idx):
        """strip(3 byte) radiotap.mcs which contains 802.11n bandwidth,
        mcs(modulation and coding scheme) and stbc(space time block coding)
        information.
        :idx: int
        :return: int
            idx
        :return: collections.namedtuple
        """
        mcs = collections.namedtuple(
            'mcs', ['known', 'index', 'have_bw', 'have_mcs', 'have_gi',
                    'have_format', 'have_fec', 'have_stbc', 'have_ness',
                    'ness_bit1'])

        idx = Radiotap.align(idx, 1)
        known, flags, index = struct.unpack_from('<BBB', self._rtap, idx)
        bits = format(flags, '032b')[::-1]

        mcs.known = known               # Known MCS information
        mcs.index = index               # MCS index
        mcs.have_bw = int(bits[0])      # Bandwidth
        mcs.have_mcs = int(bits[1])     # MCS
        mcs.have_gi = int(bits[2])      # Guard Interval
        mcs.have_format = int(bits[3])  # Format
        mcs.have_fec = int(bits[4])     # FEC(Forward Error Correction) type
        mcs.have_stbc = int(bits[5])    # Space Time Block Coding
        mcs.have_ness = int(bits[6])    # Number of Extension Spatial Streams
        mcs.ness_bit1 = int(bits[7])    # Number of Extension Spatial Streams bit 1
        return idx + 3, mcs
def strip_mcs(self, idx):
        """strip(3 byte) radiotap.mcs which contains 802.11n bandwidth,
        mcs(modulation and coding scheme) and stbc(space time block coding)
        information.
        :idx: int
        :return: int
            idx
        :return: collections.namedtuple
        """
        mcs = collections.namedtuple(
            'mcs', ['known', 'index', 'have_bw', 'have_mcs', 'have_gi',
                    'have_format', 'have_fec', 'have_stbc', 'have_ness',
                    'ness_bit1'])

        idx = Radiotap.align(idx, 1)
        known, flags, index = struct.unpack_from('<BBB', self._rtap, idx)
        bits = format(flags, '032b')[::-1]

        mcs.known = known               # Known MCS information
        mcs.index = index               # MCS index
        mcs.have_bw = int(bits[0])      # Bandwidth
        mcs.have_mcs = int(bits[1])     # MCS
        mcs.have_gi = int(bits[2])      # Guard Interval
        mcs.have_format = int(bits[3])  # Format
        mcs.have_fec = int(bits[4])     # FEC(Forward Error Correction) type
        mcs.have_stbc = int(bits[5])    # Space Time Block Coding
        mcs.have_ness = int(bits[6])    # Number of Extension Spatial Streams
        mcs.ness_bit1 = int(bits[7])    # Number of Extension Spatial Streams bit 1
        return idx + 3, mcs
def strip_mcs ( self , idx ) : mcs = collections . namedtuple ( 'mcs' , [ 'known' , 'index' , 'have_bw' , 'have_mcs' , 'have_gi' , 'have_format' , 'have_fec' , 'have_stbc' , 'have_ness' , 'ness_bit1' ] ) idx = Radiotap . align ( idx , 1 ) known , flags , index = struct . unpack_from ( '<BBB' , self . _rtap , idx ) bits = format ( flags , '032b' ) [ : : - 1 ] mcs . known = known # Known MCS information mcs . index = index # MCS index mcs . have_bw = int ( bits [ 0 ] ) # Bandwidth mcs . have_mcs = int ( bits [ 1 ] ) # MCS mcs . have_gi = int ( bits [ 2 ] ) # Guard Interval mcs . have_format = int ( bits [ 3 ] ) # Format mcs . have_fec = int ( bits [ 4 ] ) # FEC(Forward Error Correction) type mcs . have_stbc = int ( bits [ 5 ] ) # Space Time Block Coding mcs . have_ness = int ( bits [ 6 ] ) # Number of Extension Spatial Streams mcs . ness_bit1 = int ( bits [ 7 ] ) # Number of Extension Spatial Streams bit 1 return idx + 3 , mcs
strip(3 byte) radiotap.mcs which contains 802.11n bandwidth,
        mcs(modulation and coding scheme) and stbc(space time block coding)
        information.
        :idx: int
        :return: int
            idx
        :return: collections.namedtuple
strip ( 3 byte ) radiotap . mcs which contains 802 . 11n bandwidth mcs ( modulation and coding scheme ) and stbc ( space time block coding ) information . : idx : int : return : int idx : return : collections . namedtuple