Class RadioTap

scapy/layers/dot11.py:305–573

# RADIOTAP

class RadioTap(Packet):
    name = "RadioTap"
    deprecated_fields = {
        "Channel": ("ChannelFrequency", "2.4.3"),
        "ChannelFlags2": ("ChannelPlusFlags", "2.4.3"),
        "ChannelNumber": ("ChannelPlusNumber", "2.4.3"),
    }
    fields_desc = [
        ByteField('version', 0),
        ByteField('pad', 0),
        LEShortField('len', None),
        FlagsField('present', None, -32, _rt_present),  # noqa: E501
        # Extended presence mask
        ConditionalField(PacketListField("Ext", [], next_cls_cb=_next_radiotap_extpm), lambda pkt: pkt.present and pkt.present.Ext),  # noqa: E501
        # RadioTap fields - each starts with a ReversePadField
        # to handle padding

        # TSFT
        ConditionalField(
            ReversePadField(
                LELongField("mac_timestamp", 0),
                8
            ),
            lambda pkt: pkt.present and pkt.present.TSFT),
        # Flags
        ConditionalField(
            FlagsField("Flags", None, -8, _rt_flags),
            lambda pkt: pkt.present and pkt.present.Flags),
        # Rate
        ConditionalField(
            ScalingField("Rate", 0, scaling=0.5,
                         unit="Mbps", fmt="B"),
            lambda pkt: pkt.present and pkt.present.Rate),
        # Channel
        ConditionalField(
            ReversePadField(
                LEShortField("ChannelFrequency", 0),
                2
            ),
            lambda pkt: pkt.present and pkt.present.Channel),
        ConditionalField(
            FlagsField("ChannelFlags", None, -16, _rt_channelflags),
            lambda pkt: pkt.present and pkt.present.Channel),
        # dBm_AntSignal
        ConditionalField(
            ScalingField("dBm_AntSignal", 0,
                         unit="dBm", fmt="b"),
            lambda pkt: pkt.present and pkt.present.dBm_AntSignal),
        # dBm_AntNoise
        ConditionalField(
            ScalingField("dBm_AntNoise", 0,
                         unit="dBm", fmt="b"),
            lambda pkt: pkt.present and pkt.present.dBm_AntNoise),
        # Lock_Quality
        ConditionalField(
            ReversePadField(
                LEShortField("Lock_Quality", 0),
                2