sven
a3f53767e4
to DB driven to permit user modification: modified: netbox_dns_bridge/models.py Add 4 cols for values. modified: netbox_dns_bridge/migrations/0003_catalogzone_and_per_zone_identifier.py Adjust migration. This expects that the last migration the user has is 0002 (<=v1.5.8) modified: netbox_dns_bridge/jobs/notify.py modified: netbox_dns_bridge/management/commands/dns_transfer_endpoint/catalog_zone_manager.py Update to use new db values for SOA creation. Change UI to permit editing for SOA values and disable member identifier editing. modified: netbox_dns_bridge/forms.py modified: netbox_dns_bridge/navigation.py new file: netbox_dns_bridge/templates/netbox_dns_bridge/catalog_zone_edit.html new file: netbox_dns_bridge/templates/netbox_dns_bridge/catalog_zone_list.html new file: netbox_dns_bridge/templates/netbox_dns_bridge/catalog_zone_members.html deleted: netbox_dns_bridge/templates/netbox_dns_bridge/catz_overview.html modified: netbox_dns_bridge/tables.py modified: netbox_dns_bridge/urls.py modified: netbox_dns_bridge/views.py modified: netbox_dns_bridge/filtersets.py GUI components are entirely AI generated. Plumbing also with AI assist but code verified.
319 lines
10 KiB
Python
319 lines
10 KiB
Python
import dns.message
|
|
import dns.name
|
|
import dns.opcode
|
|
import dns.query
|
|
import dns.rdatatype
|
|
import dns.rdataclass
|
|
import dns.rrset
|
|
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, Record
|
|
from netbox_dns_bridge.utils import get_logger
|
|
from netbox_dns_bridge.models import SeenTransferClients, CatalogZone
|
|
|
|
LOGGER = get_logger(__name__)
|
|
SETTINGS = settings.PLUGINS_CONFIG.get("netbox_dns_bridge", {})
|
|
|
|
|
|
def _load_tsig_key(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 _send_notify(
|
|
zone_name,
|
|
soa_serial,
|
|
targets,
|
|
tsig_key,
|
|
view_name,
|
|
notify_over_tcp,
|
|
port,
|
|
log_prefix="NOTIFY",
|
|
soa_refresh=60,
|
|
soa_retry=10,
|
|
soa_expire=1209600,
|
|
soa_minimum=0,
|
|
):
|
|
"""Build a DNS NOTIFY message for *zone_name* and send it to every target IP."""
|
|
fqdn = dns.name.from_text(zone_name, dns.name.root).to_text()
|
|
msg = dns.message.make_query(fqdn, dns.rdatatype.SOA)
|
|
msg.flags |= dns.flags.AA
|
|
msg.set_opcode(dns.opcode.NOTIFY)
|
|
|
|
soa_rdata = dns.rdata.from_text(
|
|
dns.rdataclass.IN,
|
|
dns.rdatatype.SOA,
|
|
f"invalid. invalid. {soa_serial} {soa_refresh} {soa_retry} {soa_expire} {soa_minimum}",
|
|
)
|
|
msg.answer.append(dns.rrset.from_rdata(fqdn, 0, soa_rdata))
|
|
msg.use_tsig(keyring={tsig_key.name: tsig_key}, keyname=tsig_key.name)
|
|
|
|
for target in targets:
|
|
try:
|
|
if notify_over_tcp:
|
|
LOGGER.debug(f"Sending {log_prefix} over TCP")
|
|
dns.query.tcp(msg, target, port=port, timeout=2)
|
|
else:
|
|
LOGGER.debug(f"Sending {log_prefix} over UDP")
|
|
dns.query.udp(msg, target, port=port, timeout=2)
|
|
|
|
LOGGER.info(
|
|
f"{log_prefix} sent: {target} {view_name}/{fqdn} {soa_serial}"
|
|
)
|
|
except Exception as e:
|
|
LOGGER.error(
|
|
f"{log_prefix} failed: {target}:{port}"
|
|
f" {view_name}/{fqdn} {soa_serial}: {e}"
|
|
)
|
|
|
|
|
|
class SendClientNotify(JobRunner):
|
|
class Meta:
|
|
name = "Send DNS NOTIFY"
|
|
|
|
def run(self, *args, **kwargs):
|
|
notify_over_tcp = SETTINGS.get("notify_over_tcp", False)
|
|
port = SETTINGS.get("notify_client_port", 53)
|
|
view_name = kwargs["view_name"]
|
|
zone_name = kwargs["zone_name"]
|
|
soa_serial = kwargs["soa_serial"]
|
|
soa_refresh = kwargs.get("soa_refresh", 60)
|
|
soa_retry = kwargs.get("soa_retry", 10)
|
|
soa_expire = kwargs.get("soa_expire", 1209600)
|
|
soa_minimum = kwargs.get("soa_minimum", 0)
|
|
|
|
try:
|
|
view = View.objects.get(name=view_name)
|
|
tsig_key = _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 = list(
|
|
SeenTransferClients.objects.filter(
|
|
view=view, last_seen__gte=seen_cutoff
|
|
).values_list("source_ip", flat=True)
|
|
)
|
|
|
|
_send_notify(
|
|
zone_name, soa_serial, clients, tsig_key,
|
|
view_name, notify_over_tcp, port, log_prefix="NOTIFY",
|
|
soa_refresh=soa_refresh, soa_retry=soa_retry,
|
|
soa_expire=soa_expire, soa_minimum=soa_minimum,
|
|
)
|
|
|
|
except View.DoesNotExist as e:
|
|
LOGGER.error(f"Failed to get view for NOTIFY: {e}")
|
|
|
|
except OperationalError as e:
|
|
LOGGER.error(f"NOTIFY failed due to unexpected error: {e}")
|
|
close_old_connections()
|
|
|
|
|
|
class SendNSNotify(JobRunner):
|
|
"""Send a NOTIFY straight to a zone's own nameservers.
|
|
|
|
Unlike ``SendClientNotify`` (which notifies clients that previously queried
|
|
the transfer endpoint), this job resolves the addresses of the zone's
|
|
configured nameservers from NetBox DNS itself and notifies each of them so
|
|
they pick up the changed zone quickly.
|
|
"""
|
|
|
|
class Meta:
|
|
name = "Send DNS NOTIFY to zone nameservers"
|
|
|
|
def run(self, *args, **kwargs):
|
|
notify_over_tcp = SETTINGS.get("notify_over_tcp", False)
|
|
port = SETTINGS.get("notify_ns_port", 53)
|
|
view_name = kwargs["view_name"]
|
|
zone_name = kwargs["zone_name"]
|
|
soa_serial = kwargs["soa_serial"]
|
|
|
|
try:
|
|
zone = Zone.objects.get(pk=kwargs["zone_id"])
|
|
except Zone.DoesNotExist:
|
|
LOGGER.error(f"NS NOTIFY: zone id {kwargs['zone_id']} no longer exists")
|
|
return
|
|
except OperationalError as e:
|
|
LOGGER.error(f"NS NOTIFY failed due to unexpected error: {e}")
|
|
close_old_connections()
|
|
return
|
|
|
|
ns_targets = _resolve_zone_nameserver_ips(zone)
|
|
if not ns_targets:
|
|
LOGGER.warning(
|
|
f"NS NOTIFY: no nameserver addresses found in NetBox DNS for "
|
|
f"{view_name}/{zone_name} — skipping"
|
|
)
|
|
return
|
|
|
|
try:
|
|
tsig_key = _load_tsig_key(view_name)
|
|
except RuntimeError as e:
|
|
LOGGER.error(f"NS NOTIFY aborted for {view_name}/{zone_name}: {e}")
|
|
return
|
|
|
|
_send_notify(
|
|
zone_name, soa_serial, ns_targets, tsig_key,
|
|
view_name, notify_over_tcp, port, log_prefix="NS NOTIFY",
|
|
)
|
|
|
|
|
|
def _get_soa_serial(zone: Zone):
|
|
"""Return the current SOA serial of a zone parsed from its SOA record."""
|
|
try:
|
|
soa_record = Record.objects.filter(zone=zone, type="SOA", active=True).first()
|
|
if soa_record is None:
|
|
LOGGER.error(f"Zone {zone.name} has no active SOA record — skipping NOTIFY")
|
|
return None
|
|
|
|
return int(soa_record.value.split()[2])
|
|
|
|
except OperationalError as e:
|
|
LOGGER.error(f"DB ERROR while fetching SOA for zone {zone.name}: {e}")
|
|
close_old_connections()
|
|
return None
|
|
except (ValueError, IndexError) as e:
|
|
LOGGER.error(f"Failed to parse SOA serial for zone {zone.name}: {e}")
|
|
return None
|
|
|
|
|
|
def _resolve_zone_nameserver_ips(zone: Zone) -> list:
|
|
"""Resolve the zone's nameserver hostnames to IPs using NetBox DNS records.
|
|
|
|
For each nameserver assigned to the zone, matching active A/AAAA records
|
|
within the same view are looked up in NetBox DNS. Returns a de-duplicated,
|
|
order-preserving list of IP addresses.
|
|
"""
|
|
ips = []
|
|
try:
|
|
nameservers = list(zone.nameservers.all())
|
|
view = zone.view
|
|
|
|
for nameserver in nameservers:
|
|
fqdn = dns.name.from_text(nameserver.name, dns.name.root).to_text()
|
|
# Match both with and without a trailing dot to be resilient against
|
|
# how the fqdn is stored on the Record model.
|
|
candidates = {fqdn, fqdn.rstrip(".")}
|
|
|
|
records = Record.objects.filter(
|
|
fqdn__in=list(candidates),
|
|
type__in=["A", "AAAA"],
|
|
active=True,
|
|
zone__view=view,
|
|
)
|
|
for record in records:
|
|
if record.value not in ips:
|
|
ips.append(record.value)
|
|
|
|
except OperationalError as e:
|
|
LOGGER.error(f"DB ERROR while resolving nameservers for {zone.name}: {e}")
|
|
close_old_connections()
|
|
|
|
return ips
|
|
|
|
|
|
def _notify_ns_enabled(zone) -> bool:
|
|
"""Return True if a NOTIFY to the zone's nameservers should be sent.
|
|
|
|
Enabled either globally for every zone via ``notify_ns_all_zones`` or per
|
|
zone when the boolean custom field named by ``notify_ns_custom_field_name``
|
|
is set to True on the zone.
|
|
"""
|
|
if SETTINGS.get("notify_ns_all_zones", False):
|
|
return True
|
|
|
|
cf_name = SETTINGS.get("notify_ns_custom_field_name")
|
|
if not cf_name:
|
|
return False
|
|
|
|
custom_fields = getattr(zone, "custom_field_data", None) or {}
|
|
return custom_fields.get(cf_name) is True
|
|
|
|
|
|
def schedule_client_notify(zone: Zone):
|
|
if not SETTINGS.get("notify_clients", False):
|
|
return
|
|
|
|
soa_serial = _get_soa_serial(zone)
|
|
if soa_serial is None:
|
|
return
|
|
|
|
SendClientNotify.enqueue(
|
|
zone_name=zone.name,
|
|
view_name=zone.view.name,
|
|
soa_serial=soa_serial,
|
|
)
|
|
|
|
|
|
def schedule_ns_notify(zone: Zone):
|
|
if not _notify_ns_enabled(zone):
|
|
return
|
|
|
|
soa_serial = _get_soa_serial(zone)
|
|
if soa_serial is None:
|
|
return
|
|
|
|
SendNSNotify.enqueue(
|
|
zone_id=zone.pk,
|
|
zone_name=zone.name,
|
|
view_name=zone.view.name,
|
|
soa_serial=soa_serial,
|
|
)
|
|
|
|
|
|
def schedule_catalog_zone_notify(view: View):
|
|
if not SETTINGS.get("notify_clients", False):
|
|
return
|
|
|
|
try:
|
|
catalog_zone = view.catalog_zone
|
|
except CatalogZone.DoesNotExist:
|
|
return
|
|
|
|
serial = catalog_zone.soa_serial
|
|
soa_refresh = catalog_zone.soa_refresh
|
|
soa_retry = catalog_zone.soa_retry
|
|
soa_expire = catalog_zone.soa_expire
|
|
soa_minimum = catalog_zone.soa_minimum
|
|
|
|
SendClientNotify.enqueue(
|
|
zone_name="catz",
|
|
soa_serial=serial,
|
|
view_name=view.name,
|
|
soa_refresh=soa_refresh,
|
|
soa_retry=soa_retry,
|
|
soa_expire=soa_expire,
|
|
soa_minimum=soa_minimum,
|
|
)
|
|
SendClientNotify.enqueue(
|
|
zone_name=f"{view.name}.catz",
|
|
soa_serial=serial,
|
|
view_name=view.name,
|
|
soa_refresh=soa_refresh,
|
|
soa_retry=soa_retry,
|
|
soa_expire=soa_expire,
|
|
soa_minimum=soa_minimum,
|
|
)
|