X-Git-Url: https://git.ralfj.de/zonemaker.git/blobdiff_plain/c77987cd158ecb42cca04f2b50e31b53432f5311..75353227531611c4eb6fdd12ee95a1e8eb1e96f5:/zonemaker/zone.py diff --git a/zonemaker/zone.py b/zonemaker/zone.py deleted file mode 100644 index 3033a23..0000000 --- a/zonemaker/zone.py +++ /dev/null @@ -1,168 +0,0 @@ -import re -from ipaddress import IPv4Address, IPv6Address -from typing import List, Dict, Any, Iterator - - -second = 1 -minute = 60*second -hour = 60*minute -day = 24*hour -week = 7*day - -def check_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) - if re.match(pattern, name): - return name - raise Exception(name+" is not a valid hostname") - -def time(time: int) -> str: - if time == 0: - return "0" - elif time % week == 0: - return str(time//week)+"w" - elif time % day == 0: - return str(time//day)+"d" - elif time % hour == 0: - return str(time//hour)+"h" - elif time % minute == 0: - return str(time//minute)+"m" - else: - return str(time) - -class Address: - # mypy does not know about the ipaddress types, so leave this class unannotated for now - def __init__(self, IPv4 = None, IPv6 = None) -> None: - if IPv4 is None and IPv6 is None: - raise Exception("There has to be at least one valid address!") - 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) - - def generate_rrs(self, owner: str, zone: 'Zone') -> Iterator: - if self._IPv4 is not None: - yield zone.RR(owner, 'A', self._IPv4) - if self._IPv6 is not None: - yield zone.RR(owner, 'AAAA', 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 - - def generate_rrs(self, owner: str, zone: 'Zone') -> Iterator: - if self._address is not None: - for rr in self._address.generate_rrs(owner, zone): - yield rr - # TODO - -class Service: - def __init__(self, SRV: str = None, TLSA: str=None) -> None: - self._SRV = None if SRV is None else check_hostname(SRV) - self._TLSA = TLSA - -class CName: - def __init__(self, name: str) -> None: - self._name = check_hostname(name) - - def generate_rrs(self, owner: str, zone: 'Zone') -> Iterator: - yield zone.RR(owner, 'CNAME', zone.abs_hostname(self._name)) - -class Delegation(): - def __init__(self, NS: str, DS: str = None) -> None: - self._NS = NS - self._DS = DS - - def generate_rrs(self, owner: str, zone: 'Zone') -> Iterator: - yield zone.RR(owner, 'NS', zone.abs_hostname(self._NS)) - # TODO DS - -class Zone: - def __init__(self, name: str, serialfile: str, dbfile: str, mail: str, NS: List[str], - secondary_refresh: int, secondary_retry: int, secondary_expire: int, - NX_TTL: int = None, A_TTL: int = None, other_TTL: int = None, - domains: Dict[str, Any] = {}) -> None: - self._serialfile = serialfile - self._dbfile = dbfile - - if not name.endswith('.'): raise Exception("Expected an absolute hostname") - self._name = check_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 = check_hostname(mail.replace('@', '.', 1)) - self._NS = list(map(check_hostname, NS)) - - self._refresh = secondary_refresh - self._retry = secondary_retry - self._expire = secondary_expire - - if other_TTL is None: raise Exception("Must give other_TTL") - self._NX_TTL = NX_TTL - self._A_TTL = self._AAAA_TTL = A_TTL - self._other_TTL = other_TTL - - self._domains = domains - - def RR(self, owner: str, recordType: str, data: str) -> str: - '''generate given RR, in textual representation''' - assert re.match(r'^[A-Z]+$', recordType), "got invalid record type" - # figure out TTL - attrname = "_"+recordType+"_TTL" - TTL = None # type: int - if hasattr(self, attrname): - TTL = getattr(self, attrname) - if TTL is None: - TTL = self._other_TTL - # be done - return "{0}\t{1}\t{2}\t{3}".format(self.abs_hostname(owner), TTL, recordType, data) - - def abs_hostname(self, name): - if name.endswith('.'): - return name - return name+"."+self._name - - def inc_serial(self) -> int: - # get serial - cur_serial = 0 - try: - with open(self._serialfile) as f: - cur_serial = int(f.read()) - except FileNotFoundError: - pass - # increment serial - cur_serial += 1 - # save serial - with open(self._serialfile, 'w') as f: - f.write(str(cur_serial)) - # be done - return cur_serial - - def generate_rrs(self) -> Iterator: - # SOA record - serial = self.inc_serial() - yield self.RR(self._name, 'SOA', - ('{NS} {mail} ({serial} {refresh} {retry} {expire} {NX_TTL}) ; '+ - '(serial refresh retry expire NX_TTL)').format( - NS=self.abs_hostname(self._NS[0]), mail=self._mail, serial=serial, - refresh=time(self._refresh), retry=time(self._retry), expire=time(self._expire), - NX_TTL=time(self._NX_TTL)) - ) - # NS records - for ns in self._NS: - yield self.RR(self._name, 'NS', self.abs_hostname(ns)) - - # all the rest - for name in sorted(self._domains.keys(), key=lambda s: list(reversed(s.split('.')))): - for rr in self._domains[name].generate_rrs(name, self): - yield rr - - def write(self) -> None: - for rr in self.generate_rrs(): - print(rr)