From: Ralf Jung Date: Sun, 9 Nov 2014 17:05:05 +0000 (+0100) Subject: start actually writing something X-Git-Url: https://git.ralfj.de/zonemaker.git/commitdiff_plain/dc522c047192e9e5835cb4a8a4a583d130a11ebb?ds=sidebyside;hp=c10d6915434773f5b9bc9784b73d18cdc8cf3389 start actually writing something --- diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..087ec42 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +__pycache__ +ralfj.de.py diff --git a/zone-maker b/zone-maker index 100b17a..2d52a78 100755 --- a/zone-maker +++ b/zone-maker @@ -1,5 +1,7 @@ #!/usr/bin/python3 import sys, os +from zonemaker.zone import Zone +from typing import Sequence def load_module(name, path, write_bytecode = False): import importlib.machinery @@ -9,10 +11,9 @@ def load_module(name, path, write_bytecode = False): sys.dont_write_bytecode = old_val return module -def make_zone(filename): +def make_zone(filename: str) -> None: zonefile = load_module(os.path.basename(filename), filename) - zones = zonefile.__zones__ - # TODO do something more clever with the zones + zones = zonefile.__zones__ # type: Sequence[Zone] for zone in zones: zone.write(sys.stdout) diff --git a/zonemaker/zone.py b/zonemaker/zone.py index f8390a4..c30cab1 100644 --- a/zonemaker/zone.py +++ b/zonemaker/zone.py @@ -1,24 +1,48 @@ import re from ipaddress import IPv4Address, IPv6Address -from typing import List, Dict, Any +from typing import List, Dict, Any, Iterator second = 1 minute = 60*second hour = 60*minute day = 24*hour +week = 7*day -def hostname(name: str) -> str: +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) - print(pattern) if re.match(pattern, name): 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" + 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: - def __init__(self, IPv4: str = None, IPv6: str = None) -> None: + # mypy does not know about the ipaddress types, so leave this class unannotated for now + def __init__(self, IPv4 = None, IPv6 = None) -> None: self._IPv4 = None if IPv4 is None else IPv4Address(IPv4) self._IPv6 = None if IPv6 is None else IPv6Address(IPv6) @@ -35,37 +59,58 @@ class Name: class Service: def __init__(self, SRV: str = None, TLSA: str=None) -> None: - self._SRV = SRV + self._SRV = None if SRV is None else check_hostname(SRV) self._TLSA = TLSA class CName: def __init__(self, name: str) -> None: - self._name = name + self._name = check_hostname(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 + + def __str__(self) -> str: + return "{0}\t{1}\t{2}\t{3}".format(self._owner, self._TTL, self._recordType, self._data) + class Zone: def __init__(self, name: str, mail: str, NS: List[str], - secondary_refresh: int, secondary_retry: int, secondary_discard: int, + 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._name = hostname(name) + 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 = hostname(mail.replace('@', '.', 1)) - self._NS = list(map(hostname, NS)) + self._mail = check_hostname(mail.replace('@', '.', 1)) + self._NS = list(map(check_hostname, NS)) - self._secondary_refresh = secondary_refresh - self._secondary_retry = secondary_retry - self._secondary_discard = secondary_discard + self._refresh = secondary_refresh + 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 self._other_TTL = other_TTL - def write(self, file): - raise NotImplementedError() + 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 write(self, file:Any) -> None: + for rr in self.generate_rrs(): + print(rr)