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

class PPP_ECP_Option_OUI(PPP_ECP_Option):
    fields_desc = [
        ByteEnumField("type", 0, _PPP_ecpopttypes),
        FieldLenField("len", None, length_of="data", fmt="B",
                      adjust=lambda _, val: val + 6),
        StrFixedLenField("oui", "", 3),
        ByteField("subtype", 0),
        StrLenField("data", "", length_from=lambda pkt: pkt.len - 6),
    ]


class PPP_ECP(Packet):
    fields_desc = [
        ByteEnumField("code", 1, _PPP_conftypes),
        XByteField("id", 0),
        FieldLenField("len", None, fmt="H", length_of="options",
                      adjust=lambda _, val: val + 4),
        PacketListField("options", [], PPP_ECP_Option,
                        length_from=lambda pkt: pkt.len - 4),
    ]

# Link Control Protocol (RFC 1661)


_PPP_lcptypes = {1: "Configure-Request",
                 2: "Configure-Ack",
                 3: "Configure-Nak",
                 4: "Configure-Reject",
                 5: "Terminate-Request",
                 6: "Terminate-Ack",

1: "OFPCR_ROLE_EQUAL",
                                            2: "OFPCR_ROLE_MASTER",
                                            3: "OFPCR_ROLE_SLAVE"}),
                   XIntField("pad", 0),
                   LongField("generation_id", 0)]


class OFPTRoleReply(OFPTRoleRequest):
    name = "OFPT_ROLE_REPLY"
    type = 25


class OFPTGetAsyncRequest(_ofp_header):
    name = "OFPT_GET_ASYNC_REQUEST"
    fields_desc = [ByteEnumField("version", 0x04, ofp_version),
                   ByteEnumField("type", 26, ofp_type),
                   ShortField("len", 8),
                   IntField("xid", 0)]


ofp_packet_in_reason = ["NO_MATCH",
                        "ACTION",
                        "INVALID_TTL"]

ofp_port_reason = ["ADD",
                   "DELETE",
                   "MODIFY"]

ofp_flow_removed_reason = ["IDLE_TIMEOUT",
                           "HARD_TIMEOUT",
                           "DELETE",
                           "GROUP_DELETE"]

]


ALLOWED_RETURN_CODE = {
    0: 'Success',
    1: 'Success',
    2: 'Success',
    128: 'Failure'
}


class MQTTSuback(Packet):
    name = "MQTT suback"
    fields_desc = [
        ShortField("msgid", None),
        ByteEnumField("retcode", None, ALLOWED_RETURN_CODE)
    ]


class MQTTTopic(Packet):
    name = "MQTT topic"
    fields_desc = [
        FieldLenField("len", None, length_of="topic"),
        StrLenField("topic", "", length_from=lambda pkt:pkt.len)
    ]

    def guess_payload_class(self, payload):
        return conf.padding_layer


def cb_topic(pkt, lst, cur, remain):
    """

class Dot15d4Cmd(Packet):
    name = "802.15.4 Command"
    fields_desc = [
        XLEShortField("dest_panid", 0xFFFF),
        # Users should correctly set the dest_addr field. By default is 0x0 for construction to work.  # noqa: E501
        dot15d4AddressField("dest_addr", 0x0, length_of="fcf_destaddrmode"),
        ConditionalField(XLEShortField("src_panid", 0x0), \
                         lambda pkt:util_srcpanid_present(pkt)),
        ConditionalField(dot15d4AddressField("src_addr", None,
                         length_of="fcf_srcaddrmode"),
                         lambda pkt:pkt.underlayer.getfieldval("fcf_srcaddrmode") != 0),  # noqa: E501
        # Security field present if fcf_security == True
        ConditionalField(PacketField("aux_sec_header", Dot15d4AuxSecurityHeader(), Dot15d4AuxSecurityHeader),  # noqa: E501
                         lambda pkt:pkt.underlayer.getfieldval("fcf_security") is True),  # noqa: E501
        ByteEnumField("cmd_id", 0, {
            1: "AssocReq",  # Association request
            2: "AssocResp",  # Association response
            3: "DisassocNotify",  # Disassociation notification
            4: "DataReq",  # Data request
            5: "PANIDConflictNotify",  # PAN ID conflict notification
            6: "OrphanNotify",  # Orphan notification
            7: "BeaconReq",  # Beacon request
            8: "CoordRealign",  # coordinator realignment
            9: "GTSReq"  # GTS request
            # 0x0a - 0xff reserved
        }),
        # TODO command payload
    ]

    def mysummary(self):
        return self.sprintf("802.15.4 Command %Dot15d4Cmd.cmd_id% ( %Dot15dCmd.src_panid%:%Dot15d4Cmd.src_addr% -> %Dot15d4Cmd.dest_panid%:%Dot15d4Cmd.dest_addr% )")  # noqa: E501

TACACSACNTSTATUS = {1: 'Success',
                    2: 'Error',
                    33: 'Follow'}


class TacacsAccountingRequest(Packet):

    '''

    Tacacs accounting request body from section 6.1
    https://tools.ietf.org/html/draft-ietf-opsawg-tacacs-06#section-6.1

    '''

    name = 'Tacacs Accounting Request Body'
    fields_desc = [ByteEnumField('flags', 0, TACACSACNTFLAGS),
                   ByteEnumField('authen_method', 0, TACACSAUTHORTYPE),
                   ByteEnumField('priv_lvl', 1, TACACSPRIVLEVEL),
                   ByteEnumField('authen_type', 1, TACACSAUTHENTYPE),
                   ByteEnumField('authen_service', 1, TACACSAUTHENSERVICE),
                   FieldLenField('user_len', None, fmt='!B', length_of='user'),
                   FieldLenField('port_len', None, fmt='!B', length_of='port'),
                   FieldLenField('rem_addr_len', None, fmt='!B', length_of='rem_addr'),  # noqa: E501
                   FieldLenField('arg_cnt', None, fmt='!B', count_of='arg_len_list'),  # noqa: E501
                   FieldListField('arg_len_list', [], ByteField('', 0),
                                  length_from=lambda pkt: pkt.arg_cnt),
                   StrLenField('user', '', length_from=lambda x: x.user_len),
                   StrLenField('port', '', length_from=lambda x: x.port_len),
                   StrLenField('rem_addr', '', length_from=lambda x: x.rem_addr_len)]  # noqa: E501

    def guess_payload_class(self, pay):
        if self.arg_cnt > 0:

]

    def mysummary(self):
        return self.sprintf("802.15.4 Association Response Payload ( Association Status: %Dot15d4CmdAssocResp.association_status% Assigned Address: %Dot15d4CmdAssocResp.short_address% )")  # noqa: E501


class Dot15d4CmdDisassociation(Packet):
    name = "802.15.4 Disassociation Notification Payload"
    fields_desc = [
        # Disassociation Reason
        # 0x00 == Reserved
        # 0x01 == The coordinator wishes the device to leave the PAN
        # 0x02 == The device wishes to leave the PAN
        # 0x03 - 0x7f == Reserved
        # 0x80 - 0xff == Reserved for MAC primitive enumeration values
        ByteEnumField("disassociation_reason", 0x02, {1: 'coord_wishes_device_to_leave', 2: 'device_wishes_to_leave'}),  # noqa: E501
    ]

    def mysummary(self):
        return self.sprintf("802.15.4 Disassociation Notification Payload ( Disassociation Reason %Dot15d4CmdDisassociation.disassociation_reason% )")  # noqa: E501


class Dot15d4CmdGTSReq(Packet):
    name = "802.15.4 GTS request command"
    fields_desc = [
        # GTS Characteristics field (1 octet)
        # Reserved (bits 6-7)
        BitField("reserved", 0, 2),
        # Characteristics Type (bit 5)
        BitField("charact_type", 0, 1),
        # GTS Direction (bit 4)
        BitField("gts_dir", 0, 1),

)


class PPP_LCP_Code_Reject(PPP_LCP):
    fields_desc = [
        ByteEnumField("code", 7, _PPP_lcptypes),
        XByteField("id", 0),
        FieldLenField("len", None, fmt="H", length_of="rejected_packet",
                      adjust=lambda _, val: val + 4),
        PacketField("rejected_packet", None, PPP_LCP),
    ]


class PPP_LCP_Protocol_Reject(PPP_LCP):
    fields_desc = [
        ByteEnumField("code", 8, _PPP_lcptypes),
        XByteField("id", 0),
        FieldLenField("len", None, fmt="H", length_of="rejected_information",
                      adjust=lambda _, val: val + 6),
        ShortEnumField("rejected_protocol", None, _PPP_PROTOCOLS),
        PacketField("rejected_information", None, Packet),
    ]


class PPP_LCP_Discard_Request(PPP_LCP):
    fields_desc = [
        ByteEnumField("code", 11, _PPP_lcptypes),
        XByteField("id", 0),
        FieldLenField("len", None, fmt="H", length_of="data",
                      adjust=lambda _, val: val + 8),
        IntField("magic_number", None),
        StrLenField("data", "", length_from=lambda pkt: pkt.len - 8),

BitField("instance", 0, 4),
                   ShortField("PortNumber", RandShort())]


class IE_APN_Restriction(gtp.IE_Base):
    name = "IE APN Restriction"
    fields_desc = [ByteEnumField("ietype", 127, IEType),
                   ShortField("length", None),
                   BitField("CR_flag", 0, 4),
                   BitField("instance", 0, 4),
                   ByteField("APN_Restriction", 0)]


class IE_SelectionMode(gtp.IE_Base):
    name = "IE Selection Mode"
    fields_desc = [ByteEnumField("ietype", 128, IEType),
                   ShortField("length", None),
                   BitField("CR_flag", 0, 4),
                   BitField("instance", 0, 4),
                   BitField("SPARE", 0, 6),
                   BitField("SelectionMode", 0, 2)]


class IE_MMBR(gtp.IE_Base):
    name = "IE Max MBR/APN-AMBR (MMBR)"
    fields_desc = [ByteEnumField("ietype", 72, IEType),
                   ShortField("length", None),
                   BitField("CR_flag", 0, 4),
                   BitField("instance", 0, 4),
                   IntField("uplink_rate", 0),
                   IntField("downlink_rate", 0)]

"INFO_FLAG_PPS_SYNC",
    "INFO_FLAG_MONITOR",
    "INFO_FLAG_FILEGEN",
]


class NTPInfoPeerList(Packet):

    """
    Used to return raw lists of peers.
    """
    name = "info_peer_list"
    fields_desc = [
        IPField("addr", "0.0.0.0"),
        ShortField("port", 0),
        ByteEnumField("hmode", 0, _ntp_modes),
        FlagsField("flags", 0, 8, _peer_flags),
        IntField("v6_flag", 0),
        IntField("unused1", 0),
        IP6Field("addr6", "::")
    ]


class NTPInfoPeerSummary(Packet):
    """
    Sort of the info that ntpdc returns by default.
    """
    name = "info_peer_summary"
    fields_desc = [
        IPField("dstaddr", "0.0.0.0"),
        IPField("srcaddr", "0.0.0.0"),
        ShortField("srcport", 0),

15: "L1 LAN Hello",
    16: "L2 LAN Hello",
    17: "P2P Hello",
    18: "L1 LSP",
    20: "L2 LSP",
    24: "L1 CSNP",
    25: "L2 CSNP",
    26: "L1 PSNP",
    27: "L2 PSNP"
}


class ISIS_CommonHdr(Packet):
    name = "ISIS Common Header"
    fields_desc = [
        ByteEnumField("nlpid", 0x83, network_layer_protocol_ids),
        ByteField("hdrlen", None),
        ByteField("version", 1),
        ByteField("idlen", 0),
        ByteEnumField("pdutype", None, _isis_pdu_names),
        ByteField("pduversion", 1),
        ByteField("hdrreserved", 0),
        ByteField("maxareaaddr", 0)
    ]

    def post_build(self, pkt, pay):
        # calculating checksum if requested
        pdu = pkt + pay
        checksumInfo = self[1].checksum_info(self.hdrlen)

        if checksumInfo is not None:
            (cbegin, cpos) = checksumInfo