-import re
-from ipaddress import IPv4Address, IPv6Address
-from typing import List, Dict, Any
-
-
-second = 1
-minute = 60*second
-hour = 60*minute
-day = 24*hour
-
-def hostname(name: str) -> str:
- # check hostname for validity
- label = r'[a-zA-Z90-9]([a-zA-Z90-9-]{0,61}[a-zA-Z90-9])?' # must not start or end with hyphen
- pattern = r'^{0}(\.{0})*\.?'.format(label)
- print(pattern)
- if re.match(pattern, name):
- return name
- raise Exception(name+" is not a valid hostname")
-
-class Address:
- def __init__(self, IPv4: str = None, IPv6: str = None) -> None:
- self._IPv4 = None if IPv4 is None else IPv4Address(IPv4)
- self._IPv6 = None if IPv6 is None else IPv6Address(IPv6)
-
- def IPv4(self):
- return Address(IPv4 = self._IPv4)
-
- def IPv6(self):
- return Address(IPv6 = self._IPv6)
-
-class Name:
- def __init__(self, address: Address = None, MX: List = None,
- TCP: Dict[int, Any] = None, UDP: Dict[int, Any] = None) -> None:
- self._address = address
-
-class Service:
- def __init__(self, SRV: str = None, TLSA: str=None) -> None:
- self._SRV = SRV
- self._TLSA = TLSA
-
-class CName:
- def __init__(self, name: str) -> None:
- self._name = name
-
-class Delegation():
- def __init__(self, NS: str, DS: str = None) -> None:
- pass
-
-class Zone:
- def __init__(self, name: str, mail: str, NS: List[str],
- secondary_refresh: int, secondary_retry: int, secondary_discard: int,
- NX_TTL: int = None, A_TTL: int = None, other_TTL: int = None,
- domains: Dict[str, Any] = {}) -> None:
- self._name = hostname(name)
- if not mail.endswith('.'): raise Exception("Mail must be absolute, end with a dot")
- atpos = mail.find('@')
- if atpos < 0 or atpos > mail.find('.'): raise Exception("Mail must contain an @ before the first dot")
- self._mail = hostname(mail.replace('@', '.', 1))
- self._NS = list(map(hostname, NS))
-
- self._secondary_refresh = secondary_refresh
- self._secondary_retry = secondary_retry
- self._secondary_discard = secondary_discard
-
- assert other_TTL is not None
- self._NX_TTL = other_TTL if NX_TTL is None else NX_TTL
- self._A_TTL = other_TTL if A_TTL is None else A_TTL
- self._other_TTL = other_TTL
-
- def write(self, file):
- raise NotImplementedError()