How to use the scapy.fields.XByteField function in scapy

lambda pkt: pkt.reportType in [0x07, 0x08]),
    ]

    @staticmethod
    def get_log(pkt):
        return pkt.sprintf("%UDS.service%"), repr(pkt)


bind_layers(UDS, UDS_RDTCI, service=0x19)


class UDS_RDTCIPR(Packet):
    name = 'ReadDTCInformationPositiveResponse'
    fields_desc = [
        ByteEnumField('reportType', 0, UDS_RDTCI.reportTypes),
        ConditionalField(XByteField('DTCStatusAvailabilityMask', 0),
                         lambda pkt: pkt.reportType in [0x01, 0x07, 0x11,
                                                        0x12, 0x02, 0x0A,
                                                        0x0B, 0x0C, 0x0D,
                                                        0x0E, 0x0F, 0x13,
                                                        0x15]),
        ConditionalField(ByteEnumField('DTCFormatIdentifier', 0,
                                       {0: 'ISO15031-6DTCFormat',
                                        1: 'UDS-1DTCFormat',
                                        2: 'SAEJ1939-73DTCFormat',
                                        3: 'ISO11992-4DTCFormat'}),
                         lambda pkt: pkt.reportType in [0x01, 0x07,
                                                        0x11, 0x12]),
        ConditionalField(ShortField('DTCCount', 0),
                         lambda pkt: pkt.reportType in [0x01, 0x07,
                                                        0x11, 0x12]),
        ConditionalField(StrField('DTCAndStatusRecord', 0),

class ModbusPDU06WriteSingleRegisterResponse(Packet):
    name = "Write Single Register Response"
    fields_desc = [XByteField("funcCode", 0x06),
                   XShortField("registerAddr", 0x0000),
                   XShortField("registerValue", 0x0000)]


class ModbusPDU06WriteSingleRegisterError(Packet):
    name = "Write Single Register Exception"
    fields_desc = [XByteField("funcCode", 0x86),
                   ByteEnumField("exceptCode", 1, _modbus_exceptions)]


class ModbusPDU07ReadExceptionStatusRequest(Packet):
    name = "Read Exception Status"
    fields_desc = [XByteField("funcCode", 0x07)]

    def extract_padding(self, s):
        return b"", None


class ModbusPDU07ReadExceptionStatusResponse(Packet):
    name = "Read Exception Status Response"
    fields_desc = [XByteField("funcCode", 0x07),
                   XByteField("startAddr", 0x00)]


class ModbusPDU07ReadExceptionStatusError(Packet):
    name = "Read Exception Status Exception"
    fields_desc = [XByteField("funcCode", 0x87),
                   ByteEnumField("exceptCode", 1, _modbus_exceptions)]

lambda pkt:(0x1A5 >= pkt.__offset and 0x1A6 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("PCIClassCodeSubClass", 0x00),
                         lambda pkt:(0x1A6 >= pkt.__offset and 0x1A7 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("PCIRevisionID", 0x00),
                         lambda pkt:(0x1A7 >= pkt.__offset and 0x1A8 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XShortField("PCISubsystemID", 0x0000),
                         lambda pkt:(0x1A8 >= pkt.__offset and 0x1AA <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XShortField("PCISybsystemVendorID", 0x0000),
                         lambda pkt:(0x1AA >= pkt.__offset and 0x1AC <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(StrFixedLenField("reserved_8",
                                          b"\x00" * 64,
                                          64),
                         lambda pkt:(0x1AC >= pkt.__offset and 0x1EC <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("OverrideIGMPDefaults", 0x00),
                         lambda pkt:(0x1EC >= pkt.__offset and 0x1ED <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("ConfigFlags", 0x00),
                         lambda pkt:(0x1ED >= pkt.__offset and 0x1EE <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("NumCpToSend_PLFrames", 0x00),
                         lambda pkt:(0x1EE >= pkt.__offset and 0x1EF <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(StrFixedLenField("reserved_9",
                                          b"\x00" * 29,
                                          29),
                         lambda pkt:(0x1EF >= pkt.__offset and 0x20C <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("UniCastPriority", 0x00),
                         lambda pkt:(0x20C >= pkt.__offset and 0x20D <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("McastPriority", 0x00),
                         lambda pkt:(0x20D >= pkt.__offset and 0x20E <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("IGMPPriority", 0x00),
                         lambda pkt:(0x20E >= pkt.__offset and 0x20F <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("AVStreamPriority", 0x00),
                         lambda pkt:(0x20F >= pkt.__offset and 0x210 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(LEIntField("PriorityTTL_0", 0),

lambda pkt:(0x1FB2 >= pkt.__offset and 0x1FB6 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("GoodSoundCountThreshold", 0),
                         lambda pkt:(0x1FB6 >= pkt.__offset and 0x1FB7 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("SoundCountThreshold_GoodSoundCountPass", 0),  # noqa: E501
                         lambda pkt:(0x1FB7 >= pkt.__offset and 0x1FB8 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("SoundCountThreshold_GoodSoundCountFail", 0),  # noqa: E501
                         lambda pkt:(0x1FB8 >= pkt.__offset and 0x1FB9 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XShortField("reserved_21", 0),
                         lambda pkt:(0x1FB9 >= pkt.__offset and 0x1FBB <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("ExclusiveTxPbs_percentage", 0),
                         lambda pkt:(0x1FBB >= pkt.__offset and 0x1FBC <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("ExclusiveRxPbs_percentage", 0),
                         lambda pkt:(0x1FBC >= pkt.__offset and 0x1FBD <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("OptimizationBackwardCompatible", 0),
                         lambda pkt:(0x1FBD >= pkt.__offset and 0x1FBE <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("reserved_21", 0),
                         lambda pkt:(0x1FBE >= pkt.__offset and 0x1FBF <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("MaxPbsPerSymbol", 0),
                         lambda pkt:(0x1FBF >= pkt.__offset and 0x1FC0 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("MaxModulation", 0),
                         lambda pkt:(0x1FC0 >= pkt.__offset and 0x1FC1 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("ContinuousRx", 0),
                         lambda pkt:(0x1FC1 >= pkt.__offset and 0x1FC2 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(StrFixedLenField("reserved_22",
                                          b"\x00" * 6,
                                          6),
                         lambda pkt:(0x1FC2 >= pkt.__offset and 0x1FC8 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("PBControlStatus", 0),
                         lambda pkt:(0x1FC8 >= pkt.__offset and 0x1FC9 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("STAMembershipMaskEnabled", 0),
                         lambda pkt:(0x1FC9 >= pkt.__offset and 0x1FCA <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("ExitDefaultEnabled", 0),

class ONUObject(Packet):
    """ Object Context: ONU Object """
    name = "Object Context: ONU Object"
    fields_desc = [ByteEnumField("branch", 0xD6, OamBranchEnum),
                   ShortEnumField("leaf", 0x0009, ObjectContextEnum),
                   XByteField("length", 6),
                   MACField("mac", "54:42:e2:22:11:00")
                   ]

class GpioObject(Packet):
    """ Object Context: GPIO Object """
    name = "Object Context: GPIO Object"
    fields_desc = [ByteEnumField("branch", 0xD6, OamBranchEnum),
                   ShortEnumField("leaf", 0x000B, ObjectContextEnum),
                   XByteField("length", 1),
                   XByteField("condition", 1)
                   ]

####
#### 0x09 - BRANCH ATTRIBUTES
####
class PhyAdminControl(Packet):
    """ Variable Descriptor: Phy Admin Control """
    name = "Phy Admin Control"
    fields_desc = [ByteEnumField("branch", 0x09, OamBranchEnum),
                   XShortField("leaf", 0x0005),
                   ]

class PhyAdminControlEnableSet(Packet):
    """ Variable Descriptor: Phy Admin Control Enable """
    name = "Phy Admin Control Enable"
    fields_desc = [ByteEnumField("branch", 0x09, OamBranchEnum),

lambda pkt:(0x114 >= pkt.__offset and 0x115 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("NumOfPeerNodes", 0x00),
                         lambda pkt:(0x115 >= pkt.__offset and 0x116 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(PacketListField("PeerNodes", "", PeerNode, length_from=lambda x: 56),  # noqa: E501
                         lambda pkt:(0x116 >= pkt.__offset and 0x11C <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(StrFixedLenField("reserved_5",
                                          b"\x00" * 62,
                                          62),
                         lambda pkt:(0x146 >= pkt.__offset and 0x14e <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("OverideModeDefaults", 0x00),
                         lambda pkt:(0x18C >= pkt.__offset and 0x18D <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("DisableFlowControl", 0x00),
                         lambda pkt:(0x18D >= pkt.__offset and 0x18E <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("AdvertisementCapabilities", 0x00),
                         lambda pkt:(0x18E >= pkt.__offset and 0x18F <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("OverrideMeteringDefaults", 0x00),
                         lambda pkt:(0x18F >= pkt.__offset and 0x190 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(LEIntField("MaxFramesPerSec", 0),
                         lambda pkt:(0x190 >= pkt.__offset and 0x194 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("DisableAutoNegotiation", 0x00),
                         lambda pkt:(0x194 >= pkt.__offset and 0x195 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("EnetSpeedSetting", 0x00),
                         lambda pkt:(0x195 >= pkt.__offset and 0x196 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("EnetDuplexSetting", 0x00),
                         lambda pkt:(0x196 >= pkt.__offset and 0x197 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("DisableTxFlowControl", 0x00),
                         lambda pkt:(0x197 >= pkt.__offset and 0x198 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("DisableRxFlowControl", 0x00),
                         lambda pkt:(0x198 >= pkt.__offset and 0x199 <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("PhyAddressSelection", 0x00),
                         lambda pkt:(0x199 >= pkt.__offset and 0x19A <= pkt.__offset + pkt.__length)),  # noqa: E501
        ConditionalField(XByteField("PhyAddressSelection_Data", 0x00),

XByteField("length", 0x0a),
                   XByteField("num_queue_sets", 4),
                   XByteField("values", 1),
                   XShortField("threshold0", 0x800),
                   XShortField("threshold1", 0x1000),
                   XShortField("threshold2", 0x1800),
                   XShortField("threshold3", 0x2000),
                   ]

class UnicastLogicalLinkReportThresholdsSet(Packet):
    """ Variable Descriptor: Report Thresholds Unicast Logical Link Set"""
    name = "Report Thresholds Unicast Logical Link Set"
    fields_desc = [ByteEnumField("branch", 0xD7, OamBranchEnum),
                   XShortField("leaf", 0x000b),
                   XByteField("length", 0x0a),
                   XByteField("num_queue_sets", 4),
                   XByteField("values", 1),
                   XShortField("threshold0", 0x2800),
                   XShortField("threshold1", 0x5000),
                   XShortField("threshold2", 0x7800),
                   XShortField("threshold3", 0xa000),
                   ]

class LogicalLinkForwarding(Packet):
    """ Variable Descriptor: Logical Link Forwarding """
    name = "Logical Link Forwarding"
    fields_desc = [ByteEnumField("branch", 0xD7, OamBranchEnum),
                   XShortField("leaf", 0x000c),
                   ]

class OamFrameRate(Packet):
    """ Variable Descriptor: OAM Frame Rate """

XByteField("LLID2-numq", 1),
                   XByteField("l2Q0-size",  32),
                   XByteField("LLID3-numq", 1),
                   XByteField("l3Q0-size",  32),
                   XByteField("LLID4-numq", 1),
                   XByteField("l4Q0-size",  32),
                   XByteField("LLID5-numq", 1),
                   XByteField("l5Q0-size",  32),
                   XByteField("LLID6-numq", 1),
                   XByteField("l6Q0-size",  32),
                   XByteField("LLID7-numq", 1),
                   XByteField("l7Q0-size",  32),
                   XByteField("LLID8-numq", 1),
                   XByteField("l8Q0-size",  32),
                   XByteField("LLID9-numq", 1),
                   XByteField("l9Q0-size",  32),
                   XByteField("LLID10-numq", 1),
                   XByteField("l10Q0-size",  32),
                   XByteField("LLID11-numq", 1),
                   XByteField("l11Q0-size",  32),
                   XByteField("LLID12-numq", 1),
                   XByteField("l12Q0-size",  32),
                   XByteField("LLID13-numq", 1),
                   XByteField("l13Q0-size",  32),
                   XByteField("LLID14-numq", 1),
                   XByteField("l14Q0-size",  32),
                   XByteField("LLID15-numq", 1),
                   XByteField("l15Q0-size",  16),
                   XByteField("numPort",    DFLT_NUM_UNI_PORTS),
                   XByteField("Port0-numq", DFLT_NUM_PORT_QUEUES),
                   XByteField("p0Q0-size",  DFLT_LLID_QUEUE_SIZE),
                   ]

bind_layers(CRO, ACTION_SERVICE, cmd=0x21)


# ##### DTOs ######

class DEFAULT_DTO(Packet):
    fields_desc = [
        StrFixedLenField('load', b'\xff' * 5, length=5),
    ]


class GET_CCP_VERSION_DTO(Packet):
    fields_desc = [
        XByteField('main_protocol_version', 0),
        XByteField('release_version', 0),
        StrFixedLenField('ccp_reserved', b'\x00' * 3, length=3)
    ]


class EXCHANGE_ID_DTO(Packet):
    fields_desc = [
        ByteField('slave_device_ID_length', 0),
        ByteField('data_type_qualifier', 0),
        ByteField('resource_availability_mask', 0),
        ByteField('resource_protection_mask', 0),
        StrFixedLenField('ccp_reserved', b'\xff' * 1, length=1),
    ]


class GET_SEED_DTO(Packet):

"""

from scapy.fields import ByteEnumField, ByteField, IPField, LongField, \
    ShortField, XByteField
from scapy.packet import Packet, bind_layers, bind_bottom_up
from scapy.layers.inet import IP, UDP


class MobileIP(Packet):
    name = "Mobile IP (RFC3344)"
    fields_desc = [ByteEnumField("type", 1, {1: "RRQ", 3: "RRP"})]


class MobileIPRRQ(Packet):
    name = "Mobile IP Registration Request (RFC3344)"
    fields_desc = [XByteField("flags", 0),
                   ShortField("lifetime", 180),
                   IPField("homeaddr", "0.0.0.0"),
                   IPField("haaddr", "0.0.0.0"),
                   IPField("coaddr", "0.0.0.0"),
                   LongField("id", 0), ]


class MobileIPRRP(Packet):
    name = "Mobile IP Registration Reply (RFC3344)"
    fields_desc = [ByteField("code", 0),
                   ShortField("lifetime", 180),
                   IPField("homeaddr", "0.0.0.0"),
                   IPField("haaddr", "0.0.0.0"),
                   LongField("id", 0), ]