# -*- coding: utf-8 -*-
"""Destination Options and Hop-by-Hop Options
================================================
.. module:: pcapkit.vendor.ipv6.option
This module contains the vendor crawler for **Destination Options and Hop-by-Hop Options**,
which is automatically generating :class:`pcapkit.const.ipv6.option.Option`.
"""
import collections
import csv
import re
import sys
from typing import TYPE_CHECKING
from pcapkit.vendor.default import Vendor
if TYPE_CHECKING:
from collections import Counter
__all__ = ['Option']
[docs]
class Option(Vendor):
"""Destination Options and Hop-by-Hop Options"""
#: Value limit checker.
FLAG = 'isinstance(value, int) and 0x00 <= value <= 0xFF'
#: Link to registry.
LINK = 'https://www.iana.org/assignments/ipv6-parameters/ipv6-parameters-2.csv'
def count(self, data: 'list[str]') -> 'Counter[str]':
"""Count field records.
Args:
data: Registry data.
Returns:
Field recordings.
"""
reader = csv.reader(data)
next(reader) # header
return collections.Counter(map(lambda item: self.safe_name(item[4]), reader))
def process(self, data: 'list[str]') -> 'tuple[list[str], list[str]]':
"""Process CSV data.
Args:
data: CSV data.
Returns:
Enumeration fields and missing fields.
"""
reader = csv.reader(data)
next(reader) # header
enum = [] # type: list[str]
miss = [
"return extend_enum(cls, 'Unassigned_0x%s' % hex(value)[2:].upper().zfill(2), value)",
]
for item in reader:
if not item[0]:
continue
code = item[0]
dscp = item[4]
rfcs = item[5]
temp = [] # type: list[str]
for rfc in filter(None, re.split(r'\[|\]', rfcs)):
if re.match(r'\d+', rfc):
continue
if 'RFC' in rfc and re.match(r'\d+', rfc[3:]):
#temp.append(f'[{rfc[:3]} {rfc[3:]}]')
temp.append(f'[:rfc:`{rfc[3:]}`]')
else:
temp.append(f'[{rfc}]'.replace('_', ' '))
tmp1 = f" {''.join(temp)}" if rfcs else ''
splt = re.split(r' \[\d+\]', dscp)[0]
name = re.sub(r'.* \((.*)\)', r'\1', splt)
if re.fullmatch(r'[0-9a-zA-Z]+', name) is None or name.upper() == 'DEPRECATED':
name = re.sub(r'(.*) \(.*\)', r'\1', splt)
desc = self.wrap_comment(re.sub(r'\r*\n', ' ', f'{splt}{tmp1}', re.MULTILINE))
renm = self.rename(name or 'Unassigned', code, original=dscp)
pres = f"{renm} = {code}"
sufs = f'#: {desc}'
#if len(pres) > 74:
# sufs = f"\n{' '*80}{sufs}"
#enum.append(f'{pres.ljust(76)}{sufs}')
enum.append(f'{sufs}\n {pres}')
return enum, miss
if __name__ == '__main__':
sys.exit(Option()) # type: ignore[arg-type]