import dns.rdtypes.IN.A
import dns.rdtypes.IN.AAAA
from dns.zone import Zone
+from enum import Enum, auto
import hashlib
from ipaddress import ip_address, IPv4Address, IPv6Address, ip_network, IPv4Network, IPv6Network
import json
from pathlib import Path
import socket
import sys
-from typing import Optional, Dict, List, Self, Tuple, DefaultDict, TextIO
+from typing import Optional, Dict, List, Self, Tuple, DefaultDict, TextIO, TYPE_CHECKING
+
+
+if TYPE_CHECKING:
+ from nsconfig.daemon import NscDaemon
IPAddress = IPv4Address | IPv6Address
class NscNode:
- nsc_zone: 'NscZone'
+ nsc_zone: 'NscZonePrimary'
name: str
node: Node
_ttl: int
- def __init__(self, nsc_zone: 'NscZone', name: str) -> None:
+ def __init__(self, nsc_zone: 'NscZonePrimary', name: str) -> None:
self.nsc_zone = nsc_zone
self.name = name
self.node = nsc_zone.zone.find_node(name, create=True)
new_file.replace(file)
+class ZoneType(Enum):
+ primary = auto()
+ secondary = auto()
+
+
class NscZone:
nsc: 'Nsc'
name: str
- safe_name: str # For use in file names
- zone: Zone
- _min_ttl: int
+ safe_name: str # For use in file names
+ zone_type: ZoneType
reverse_for: Optional[IPNetwork]
- zone_file: Path
- state_file: Path
- state: NscZoneState
- prev_state: NscZoneState
- def __init__(self, nsc: 'Nsc', name: str, reverse_for: Optional[IPNetwork] = None, **kwargs) -> None:
+ def __init__(self,
+ nsc: 'Nsc',
+ name: str,
+ reverse_for: Optional[IPNetwork],
+ **kwargs) -> None:
self.nsc = nsc
self.name = name
self.safe_name = name.replace('/', '@')
self.config = NscZoneConfig(**kwargs).finalize()
- self.zone = dns.zone.Zone(origin=name, rdclass=RdataClass.IN)
- self._min_ttl = int(self.config.min_ttl.total_seconds())
self.reverse_for = reverse_for
- self.zone_file = nsc.zone_dir / self.safe_name
- self.state_file = nsc.state_dir / (self.safe_name + '.json')
+ def process(self) -> None:
+ pass
+
+
+class NscZonePrimary(NscZone):
+ zone: Zone
+ _min_ttl: int
+ zone_file: Path
+ state_file: Path
+ state: NscZoneState
+ prev_state: NscZoneState
+
+ def __init__(self, *args, **kwargs) -> None:
+ super().__init__(*args, **kwargs)
+
+ self.zone_type = ZoneType.primary
+ self.zone_file = self.nsc.zone_dir / self.safe_name
+ self.state_file = self.nsc.state_dir / (self.safe_name + '.json')
+
self.state = NscZoneState()
self.prev_state = NscZoneState()
self.prev_state.load(self.state_file)
+ self.zone = dns.zone.Zone(origin=self.name, rdclass=RdataClass.IN)
+ self._min_ttl = int(self.config.min_ttl.total_seconds())
self.update_soa()
def update_soa(self) -> None:
last_name = name
def _add_ipv4_reverse(self, addr: IPv4Address, ptr_to: Name) -> None:
- # Called only for addresses from this reverse network
- assert self.reverse_for is not None
+ assert isinstance(self.reverse_for, IPv4Network)
parts = str(addr).split('.')
parts = parts[self.reverse_for.prefixlen // 8:]
name = '.'.join(reversed(parts))
self.n(name).PTR(ptr_to)
def _add_ipv6_reverse(self, addr: IPv6Address, ptr_to: Name) -> None:
- # Called only for addresses from this reverse network
- assert self.reverse_for is not None
+ assert isinstance(self.reverse_for, IPv6Network)
parts = addr.exploded.replace(':', "")
parts = parts[self.reverse_for.prefixlen // 4:]
name = '.'.join(reversed(parts))
print(f'WARNING: Serial number overflow for zone {self.name}, current is {self.state.serial}')
def process(self) -> None:
- self.gen_hash()
- self.gen_serial()
+ if self.zone_type == ZoneType.primary:
+ self.gen_hash()
+ self.gen_serial()
def write_zone(self) -> None:
self.update_soa()
def write_state(self) -> None:
self.state.save(self.state_file)
+ def is_changed(self) -> bool:
+ return self.state.serial != self.prev_state.serial
+
+
+class NscZoneSecondary(NscZone):
+ primary_server: IPAddress
+ secondary_file: Path
+
+ def __init__(self, *args, primary_server=IPAddress, **kwargs) -> None:
+ super().__init__(*args, **kwargs)
+ self.zone_type = ZoneType.secondary
+ self.primary_server = primary_server
+ self.secondary_file = self.nsc.secondary_dir / self.safe_name
+
class Nsc:
start_time: datetime
root_dir: Path
state_dir: Path
zone_dir: Path
+ secondary_dir: Path
+ daemon: 'NscDaemon' # Set by DaemonConfig class
- def __init__(self, directory: str = '.', **kwargs) -> None:
+ def __init__(self,
+ directory: str = '.',
+ daemon: Optional['NscDaemon'] = None,
+ **kwargs) -> None:
self.start_time = datetime.now()
self.zones = {}
self.default_zone_config = NscZoneConfig(**kwargs)
self.state_dir.mkdir(parents=True, exist_ok=True)
self.zone_dir = self.root_dir / 'zone'
self.zone_dir.mkdir(parents=True, exist_ok=True)
-
- def add_zone(self, *args, inherit_config: Optional[NscZoneConfig] = None, **kwargs) -> Zone:
+ self.secondary_dir = self.root_dir / 'secondary'
+ self.secondary_dir.mkdir(parents=True, exist_ok=True)
+
+ if daemon is None:
+ from nsconfig.daemon import NscDaemonNull
+ daemon = NscDaemonNull()
+ self.daemon = daemon
+ daemon.setup(self)
+
+ def add_zone(self,
+ name: Optional[str] = None,
+ reverse_for: str | IPNetwork | None = None,
+ follow_primary: str | IPAddress | None = None,
+ inherit_config: Optional[NscZoneConfig] = None,
+ **kwargs) -> Zone:
if inherit_config is None:
inherit_config = self.default_zone_config
- z = NscZone(self, *args, inherit_config=inherit_config, **kwargs)
- assert z.name not in self.zones
- self.zones[z.name] = z
- return z
- def add_reverse_zone(self, net: str | IPNetwork, name: Optional[str] = None, **kwargs) -> Zone:
- if not (isinstance(net, IPv4Network) or isinstance(net, IPv6Network)):
- net = ip_network(net, strict=True)
- name = name or self._reverse_zone_name(net)
- return self.add_zone(name, reverse_for=net, **kwargs)
+ if reverse_for is not None:
+ if isinstance(reverse_for, str):
+ reverse_for = ip_network(reverse_for, strict=True)
+ name = name or self._reverse_zone_name(reverse_for)
+ assert name is not None
+ assert name not in self.zones
+
+ z: NscZone
+ if follow_primary is None:
+ z = NscZonePrimary(self, name, reverse_for=reverse_for, inherit_config=inherit_config, **kwargs)
+ else:
+ if isinstance(follow_primary, str):
+ follow_primary = ip_address(follow_primary)
+ z = NscZoneSecondary(self, name, reverse_for=reverse_for, primary_server=follow_primary, inherit_config=inherit_config, **kwargs)
+
+ self.zones[name] = z
+ return z
def _reverse_zone_name(self, net: IPNetwork) -> str:
if isinstance(net, IPv4Network):
def fill_reverse(self) -> None:
for z in self.zones.values():
- if z.reverse_for is not None:
+ if isinstance(z, NscZonePrimary) and z.reverse_for is not None:
if isinstance(z.reverse_for, IPv4Network):
for addr4, ptr_list in self.ipv4_reverse.items():
if addr4 in z.reverse_for: