Class LcEMI

scapy/contrib/knx.py:311–352

# cEMI blocks

class LcEMI(Packet):
    name = "L_cEMI"
    fields_desc = [
        FieldLenField("additional_information_length", 0, fmt="B",
                      length_of="additional_information"),
        StrLenField("additional_information", None,
                    length_from=lambda pkt: pkt.additional_information_length),
        # Controlfield 1 (1 byte made of 8*1 bits)
        BitEnumField("frame_type", 1, 1, {
            1: "standard"
        }),
        BitField("reserved_1", 0, 1),
        BitField("repeat_on_error", 1, 1),
        BitEnumField("broadcast_type", 1, 1, {
            1: "domain"
        }),
        BitEnumField("priority", 3, 2, {
            3: "low"
        }),
        BitField("ack_request", 0, 1),
        BitField("confirmation_error", 0, 1),
        # Controlfield 2 (1 byte made of 1+3+4 bits)
        BitEnumField("address_type", 1, 1, {
            1: "group"
        }),
        BitField("hop_count", 6, 3),
        BitField("extended_frame_format", 0, 4),
        KNXAddressField("source_address", None),
        KNXGroupField("destination_address", "1/2/3"),
        FieldLenField("npdu_length", 0x01, fmt="B", length_of="data"),
        # TPCI and APCI (2 byte made of 1+1+4+4+6 bits)
        BitEnumField("packet_type", 0, 1, {
            0: "data"
        }),
        BitEnumField("sequence_type", 0, 1, {
            0: "unnumbered"
        }),
        BitField("reserved_2", 0, 4),
        BitEnumField("acpi", 2, 4, KNX_ACPI_CODES),
        BitField("data", 0, 6)

    ]


class DPcEMI(Packet):