return name
raise Exception(name+" is not a valid hostname")
-def abs_hostname(name: str, root: str = None) -> str:
- if name.endswith('.'):
- return name
- if root is None:
- raise Exception("Name {0} was expected to be absolute, but it is not".format(name))
- if not root.endswith('.'):
- raise Exception("Root {0} was expected to be absolute, but it is not".format(name))
- return name+"."+root
-
def time(time: int) -> str:
if time == 0:
return "0"
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 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:
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:
- pass
-
-class RR():
- def __init__(self, owner: str, TTL: int, recordType: str, data: str) -> None:
- assert owner.endswith('.') # users have to make this absolute first
- self._owner = owner
- self._TTL = TTL
- self._recordType = recordType
- self._data = data
+ self._NS = NS
+ self._DS = DS
- def __str__(self) -> str:
- return "{0}\t{1}\t{2}\t{3}".format(self._owner, self._TTL, self._recordType, self._data)
+ 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, mail: str, NS: List[str],
+ 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('@')
self._retry = secondary_retry
self._expire = secondary_expire
- 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
+ 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 generate_rrs(self) -> Iterator[RR]:
- serial = -1
- yield (RR(abs_hostname(self._name), self._other_TTL, 'SOA',
- '{NS} {mail} ({serial} {refresh} {retry} {expire} {NX_TTL})'.format(
- NS=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))
- ))
+ 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, file:Any) -> None:
- for rr in self.generate_rrs():
- print(rr)
+ def write(self) -> None:
+ with open(self._dbfile, 'w') as f:
+ for rr in self.generate_rrs():
+ f.write(rr+"\n")
+ print(rr)
projects / zonemaker.git / blobdiff