# -*- coding: utf-8 -*-
"""Option Actions
====================
.. module:: pcapkit.vendor.ipv6.option_action
This module contains the vendor crawler for **Option Actions**,
which is automatically generating :class:`pcapkit.const.ipv6.option_action.OptionAction`.
"""
import collections
import sys
from typing import TYPE_CHECKING
from pcapkit.vendor.default import Vendor
if TYPE_CHECKING:
from collections import Counter
__all__ = ['OptionAction']
#: Unknown option action [:rfc:`8200#section-4.2`].
DATA = {
# skip over this option and continue processing the header.
0b00: 'skip',
# discard the packet.
0b01: 'discard',
# discard the packet and, regardless of whether or not the
# packet's Destination Address was a multicast address, send an
# ICMP Parameter Problem, Code 2, message to the packet's
# Source Address, pointing to the unrecognized Option Type.
0b10: 'discard_icmp_any',
# discard the packet and, only if the packet's Destination
# Address was not a multicast address, send an ICMP Parameter
# Problem, Code 2, message to the packet's Source Address,
# pointing to the unrecognized Option Type.
0b11: 'discard_icmp_unicast',
} # type: dict[int, str]
[docs]
class OptionAction(Vendor):
"""Option Actions"""
#: Value limit checker.
FLAG = 'isinstance(value, int) and 0 <= value <= 3'
def request(self) -> 'dict[int, str]': # type: ignore[override] # pylint: disable=arguments-differ
"""Fetch registry data.
Returns:
Registry data (:data:`~pcapkit.vendor.ipv6.option_action.DATA`).
"""
return DATA
def count(self, data: 'dict[int, str]') -> 'Counter[str]': # type: ignore[override]
"""Count field records.
Args:
data: Registry data.
Returns:
Field recordings.
"""
return collections.Counter(map(self.safe_name, data.values()))
def process(self, data: 'dict[int, str]') -> 'tuple[list[str], list[str]]': # type: ignore[override]
"""Process registry data.
Args:
data: Registry data.
Returns:
Enumeration fields and missing fields.
"""
enum = [] # type: list[str]
miss = [
"return extend_enum(cls, 'Unassigned_%d' % value, value)",
]
for code, name in DATA.items():
renm = self.rename(name, code) # type: ignore[arg-type]
enum.append(f"{renm} = {code}".ljust(76))
return enum, miss
if __name__ == '__main__':
sys.exit(OptionAction()) # type: ignore[arg-type]