Source code for pcapkit.const.ipv4.tos_ecn
# -*- coding: utf-8 -*-
# pylint: disable=line-too-long,consider-using-f-string
"""ToS ECN Field
===================
.. module:: pcapkit.const.ipv4.tos_ecn
This module contains the constant enumeration for **ToS ECN Field**,
which is automatically generated from :class:`pcapkit.vendor.ipv4.tos_ecn.ToSECN`.
"""
from aenum import IntEnum, extend_enum
__all__ = ['ToSECN']
[docs]
class ToSECN(IntEnum):
"""[ToSECN] ToS ECN Field"""
Not_ECT = 0b00
ECT_0b01 = 0b01
ECT_0b10 = 0b10
CE = 0b11
@staticmethod
def get(key: 'int | str', default: 'int' = -1) -> 'ToSECN':
"""Backport support for original codes.
Args:
key: Key to get enum item.
default: Default value if not found.
:meta private:
"""
if isinstance(key, int):
return ToSECN(key)
if key not in ToSECN._member_map_: # pylint: disable=no-member
return extend_enum(ToSECN, key, default)
return ToSECN[key] # type: ignore[misc]
[docs]
@classmethod
def _missing_(cls, value: 'int') -> 'ToSECN':
"""Lookup function used when value is not found.
Args:
value: Value to get enum item.
"""
if not (isinstance(value, int) and 0b00 <= value <= 0b11):
raise ValueError('%r is not a valid %s' % (value, cls.__name__))
return extend_enum(cls, 'Unassigned_0b%s' % bin(value)[2:].zfill(2), value)