Sven Luethi
5747b044b6
modified: management/commands/dns-export-zone.py modified: management/commands/dns-export-zones.py modified: management/commands/dns-transfer-endpoint.py modified: notify_handler.py modified: request_handler.py Guard all db requests against broken database connections.
87 lines
3.1 KiB
Python
87 lines
3.1 KiB
Python
import dns.message
|
|
import dns.name
|
|
import dns.opcode
|
|
import dns.query
|
|
import dns.rdatatype
|
|
import dns.tsig
|
|
from django.conf import settings
|
|
from django.utils import timezone
|
|
from django.db import close_old_connections, OperationalError
|
|
from netbox.jobs import JobRunner
|
|
from netbox_dns.models import View, Zone
|
|
from .logger import get_logger
|
|
from .models import SeenTransferClients
|
|
|
|
logger = get_logger(__name__)
|
|
SETTINGS = settings.PLUGINS_CONFIG["netbox_dns_bridge"]
|
|
|
|
|
|
class SendDNSNotify(JobRunner):
|
|
class Meta:
|
|
name = "Send DNS NOTIFY"
|
|
|
|
def _load_tsig_key(self, view_name: str) -> dns.tsig.Key:
|
|
tsig_keys = SETTINGS.get("tsig_keys", {})
|
|
if view_name not in tsig_keys:
|
|
raise RuntimeError(f"No TSIG key configured for view '{view_name}'")
|
|
|
|
key_data = tsig_keys[view_name]
|
|
raw_key_name = key_data.get("keyname")
|
|
secret = key_data.get("secret")
|
|
algorithm = key_data.get("algorithm")
|
|
if not algorithm:
|
|
raise RuntimeError(
|
|
f"Missing 'algorithm' in TSIG key configuration for view '{view_name}'"
|
|
)
|
|
|
|
if not raw_key_name or not secret:
|
|
raise RuntimeError(
|
|
f"Incomplete TSIG key configuration for view '{view_name}'"
|
|
)
|
|
|
|
key_name = dns.name.from_text(raw_key_name, origin=None).canonicalize()
|
|
if not key_name.is_absolute():
|
|
key_name = key_name.concatenate(dns.name.root)
|
|
|
|
return dns.tsig.Key(name=key_name, secret=secret, algorithm=algorithm)
|
|
|
|
def run(self, *args, **kwargs):
|
|
view_name = kwargs["view_name"]
|
|
zone_name = kwargs["zone_name"]
|
|
|
|
try:
|
|
view = View.objects.get(name=view_name)
|
|
tsig_key = self._load_tsig_key(view_name)
|
|
cutoff_hours = SETTINGS.get("notify_client_alive_threshold_hours", 24)
|
|
seen_cutoff = timezone.now() - timezone.timedelta(hours=cutoff_hours)
|
|
clients = SeenTransferClients.objects.filter(
|
|
view=view, last_seen__gte=seen_cutoff
|
|
)
|
|
|
|
for name in (zone_name, "catz", f"{view_name}.catz"):
|
|
msg = dns.message.make_query(name, dns.rdatatype.SOA)
|
|
msg.flags = 0
|
|
msg.set_opcode(dns.opcode.NOTIFY)
|
|
msg.use_tsig(keyring={tsig_key.name: tsig_key}, keyname=tsig_key.name)
|
|
|
|
for client in clients:
|
|
try:
|
|
dns.query.udp(msg, client.source_ip, timeout=2)
|
|
self.logger.info(
|
|
f"NOTIFY sent to {client.source_ip} for zone {name}"
|
|
)
|
|
except Exception as e:
|
|
self.logger.error(
|
|
f"NOTIFY failed for {client.source_ip} zone {name}: {e}"
|
|
)
|
|
except OperationalError as e:
|
|
self.logger.error(f"NOTIFY failed due to unexpected error: {e}")
|
|
close_old_connections()
|
|
|
|
|
|
def schedule(zone: Zone):
|
|
SendDNSNotify.enqueue(
|
|
zone_name=zone.name,
|
|
view_name=zone.view.name,
|
|
)
|