# -*- coding: utf-8 -*-
"""IPv6 Destination Options and Hop-by-Hop Options"""
import collections
import csv
import re
from pcapkit.vendor.default import Vendor
__all__ = ['Option']
#: IPv6 option registry.
DATA = {
# [RFC 8200] 0
0x00: ('pad', 'Pad1'),
0x01: ('padn', 'PadN'), # [RFC 8200]
# [RFC 2473] 1
0x04: ('tun', 'Tunnel Encapsulation Limit'),
# [RFC 2711] 2
0x05: ('ra', 'Router Alert'),
0x07: ('calipso', 'Common Architecture Label IPv6 Security Option'),
# [RFC 5570]
0x08: ('smf_dpd', 'Simplified Multicast Forwarding'), # [RFC 6621]
# [RFC 8250] 10
0x0F: ('pdm', 'Performance and Diagnostic Metrics'),
# [RFC 4782][RFC Errata 2034] 6
0x26: ('qs', 'Quick-Start'),
0x63: ('rpl', 'Routing Protocol for Low-Power and Lossy Networks'),
# [RFC 6553]
0x6D: ('mpl', 'Multicast Protocol for Low-Power and Lossy Networks'),
# [RFC 7731]
0x8B: ('ilnp', 'Identifier-Locator Network Protocol Nonce'), # [RFC 6744]
0x8C: ('lio', 'Line-Identification Option'), # [RFC 6788]
0xC2: ('jumbo', 'Jumbo Payload'), # [RFC 2675]
0xC9: ('home', 'Home Address'), # [RFC 6275]
0xEE: ('ip_dff', 'Depth-First Forwarding'), # [RFC 6971]
}
[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'
[docs] def count(self, data):
"""Count field records.
Args:
data (List[str]): CSV data.
Returns:
Counter: Field recordings.
"""
reader = csv.reader(data)
next(reader) # header
return collections.Counter(map(lambda item: self.safe_name(item[4]), reader)) # pylint: disable=map-builtin-not-iterating
[docs] def process(self, data):
"""Process CSV data.
Args:
data (List[str]): CSV data.
Returns:
List[str]: Enumeration fields.
List[str]: Missing fields.
"""
reader = csv.reader(data)
next(reader) # header
enum = list()
miss = [
"extend_enum(cls, 'Unassigned_0x%s' % hex(value)[2:].upper().zfill(2), value)",
'return cls(value)'
]
for item in reader:
if not item[0]:
continue
code = item[0]
dscp = item[4]
rfcs = item[5]
temp = list()
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]
subn = re.sub(r'.* \((.*)\)', r'\1', splt)
name = DATA.get(int(code, base=16), (str(),))[0].upper() or subn
desc = self.wrap_comment(re.sub(r'\r*\n', ' ', f'{name}{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__":
Option()