349 lines
14 KiB
Python
349 lines
14 KiB
Python
from django.core.exceptions import ValidationError
|
|
from django.db import models
|
|
from django.utils.translation import ungettext, ugettext_lazy as _
|
|
|
|
from orchestra.core.validators import validate_ipv4_address, validate_ipv6_address, validate_ascii
|
|
from orchestra.utils.python import AttrDict
|
|
|
|
from . import settings, validators, utils
|
|
|
|
|
|
class DomainQuerySet(models.QuerySet):
|
|
def get_parent(self, name, top=False):
|
|
""" get the next domain on the chain """
|
|
split = name.split('.')
|
|
parent = None
|
|
for i in range(1, len(split)-1):
|
|
name = '.'.join(split[i:])
|
|
domain = Domain.objects.filter(name=name)
|
|
if domain:
|
|
parent = domain.get()
|
|
if not top:
|
|
return parent
|
|
return parent
|
|
|
|
|
|
class Domain(models.Model):
|
|
name = models.CharField(_("name"), max_length=256, unique=True, db_index=True,
|
|
help_text=_("Domain or subdomain name."),
|
|
validators=[
|
|
validators.validate_domain_name,
|
|
validators.validate_allowed_domain
|
|
])
|
|
account = models.ForeignKey('accounts.Account', verbose_name=_("Account"), blank=True,
|
|
related_name='domains', on_delete=models.CASCADE, help_text=_("Automatically selected for subdomains."))
|
|
top = models.ForeignKey('domains.Domain', null=True, related_name='subdomain_set',
|
|
editable=False, verbose_name=_("top domain"), on_delete=models.CASCADE)
|
|
serial = models.IntegerField(_("serial"), default=utils.generate_zone_serial, editable=False,
|
|
help_text=_("A revision number that changes whenever this domain is updated."))
|
|
refresh = models.CharField(_("refresh"), max_length=16, blank=True,
|
|
validators=[validators.validate_zone_interval],
|
|
help_text=_("The time a secondary DNS server waits before querying the primary DNS "
|
|
"server's SOA record to check for changes. When the refresh time expires, "
|
|
"the secondary DNS server requests a copy of the current SOA record from "
|
|
"the primary. The primary DNS server complies with this request. "
|
|
"The secondary DNS server compares the serial number of the primary DNS "
|
|
"server's current SOA record and the serial number in it's own SOA record. "
|
|
"If they are different, the secondary DNS server will request a zone "
|
|
"transfer from the primary DNS server. "
|
|
"The default value is <tt>%s</tt>.") % settings.DOMAINS_DEFAULT_REFRESH)
|
|
retry = models.CharField(_("retry"), max_length=16, blank=True,
|
|
validators=[validators.validate_zone_interval],
|
|
help_text=_("The time a secondary server waits before retrying a failed zone transfer. "
|
|
"Normally, the retry time is less than the refresh time. "
|
|
"The default value is <tt>%s</tt>.") % settings.DOMAINS_DEFAULT_RETRY)
|
|
expire = models.CharField(_("expire"), max_length=16, blank=True,
|
|
validators=[validators.validate_zone_interval],
|
|
help_text=_("The time that a secondary server will keep trying to complete a zone "
|
|
"transfer. If this time expires prior to a successful zone transfer, "
|
|
"the secondary server will expire its zone file. This means the secondary "
|
|
"will stop answering queries. "
|
|
"The default value is <tt>%s</tt>.") % settings.DOMAINS_DEFAULT_EXPIRE)
|
|
min_ttl = models.CharField(_("min TTL"), max_length=16, blank=True,
|
|
validators=[validators.validate_zone_interval],
|
|
help_text=_("The minimum time-to-live value applies to all resource records in the "
|
|
"zone file. This value is supplied in query responses to inform other "
|
|
"servers how long they should keep the data in cache. "
|
|
"The default value is <tt>%s</tt>.") % settings.DOMAINS_DEFAULT_MIN_TTL)
|
|
dns2136_address_match_list = models.CharField(max_length=80, default=settings.DOMAINS_DEFAULT_DNS2136,
|
|
blank=True,
|
|
help_text="A bind-9 'address_match_list' that will be granted permission to perform "
|
|
"dns2136 updates. Chiefly used to enable Let's Encrypt self-service validation.")
|
|
|
|
objects = DomainQuerySet.as_manager()
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
@property
|
|
def origin(self):
|
|
return self.top or self
|
|
|
|
@property
|
|
def is_top(self):
|
|
# don't cache, don't replace by top_id
|
|
try:
|
|
return not bool(self.top)
|
|
except Domain.DoesNotExist:
|
|
return False
|
|
|
|
@property
|
|
def subdomains(self):
|
|
return Domain.objects.filter(name__regex='\.%s$' % self.name)
|
|
|
|
def clean(self):
|
|
self.name = self.name.lower()
|
|
|
|
def save(self, *args, **kwargs):
|
|
""" create top relation """
|
|
update = False
|
|
if not self.pk:
|
|
top = self.get_parent(top=True)
|
|
if top:
|
|
self.top = top
|
|
self.account_id = self.account_id or top.account_id
|
|
else:
|
|
update = True
|
|
super(Domain, self).save(*args, **kwargs)
|
|
if update:
|
|
for domain in self.subdomains.exclude(pk=self.pk):
|
|
# queryset.update() is not used because we want to trigger backend to delete ex-topdomains
|
|
domain.top = self
|
|
domain.save(update_fields=('top',))
|
|
|
|
def get_description(self):
|
|
if self.is_top:
|
|
num = self.subdomains.count()
|
|
return ungettext(
|
|
_("top domain with one subdomain"),
|
|
_("top domain with %d subdomains") % num,
|
|
num)
|
|
return _("subdomain")
|
|
|
|
def get_absolute_url(self):
|
|
return 'http://%s' % self.name
|
|
|
|
def get_declared_records(self):
|
|
""" proxy method, needed for input validation, see helpers.domain_for_validation """
|
|
return self.records.all()
|
|
|
|
def get_subdomains(self):
|
|
""" proxy method, needed for input validation, see helpers.domain_for_validation """
|
|
return self.origin.subdomain_set.all().prefetch_related('records')
|
|
|
|
def get_parent(self, top=False):
|
|
return type(self).objects.get_parent(self.name, top=top)
|
|
|
|
def render_zone(self):
|
|
origin = self.origin
|
|
zone = origin.render_records()
|
|
tail = []
|
|
for subdomain in origin.get_subdomains():
|
|
if subdomain.name.startswith('*'):
|
|
# This subdomains needs to be rendered last in order to avoid undesired matches
|
|
tail.append(subdomain)
|
|
else:
|
|
zone += subdomain.render_records()
|
|
for subdomain in sorted(tail, key=lambda x: len(x.name), reverse=True):
|
|
zone += subdomain.render_records()
|
|
return zone.strip()
|
|
|
|
def refresh_serial(self):
|
|
""" Increases the domain serial number by one """
|
|
serial = utils.generate_zone_serial()
|
|
if serial <= self.serial:
|
|
num = int(str(self.serial)[8:]) + 1
|
|
if num >= 99:
|
|
raise ValueError('No more serial numbers for today')
|
|
serial = str(self.serial)[:8] + '%.2d' % num
|
|
serial = int(serial)
|
|
self.serial = serial
|
|
self.save(update_fields=('serial',))
|
|
|
|
def get_default_soa(self):
|
|
return ' '.join([
|
|
"%s." % settings.DOMAINS_DEFAULT_NAME_SERVER,
|
|
utils.format_hostmaster(settings.DOMAINS_DEFAULT_HOSTMASTER),
|
|
str(self.serial),
|
|
self.refresh or settings.DOMAINS_DEFAULT_REFRESH,
|
|
self.retry or settings.DOMAINS_DEFAULT_RETRY,
|
|
self.expire or settings.DOMAINS_DEFAULT_EXPIRE,
|
|
self.min_ttl or settings.DOMAINS_DEFAULT_MIN_TTL,
|
|
])
|
|
|
|
def get_default_records(self):
|
|
defaults = []
|
|
if self.is_top:
|
|
for ns in settings.DOMAINS_DEFAULT_NS:
|
|
defaults.append(AttrDict(
|
|
type=Record.NS,
|
|
value=ns
|
|
))
|
|
soa = self.get_default_soa()
|
|
defaults.insert(0, AttrDict(
|
|
type=Record.SOA,
|
|
value=soa
|
|
))
|
|
for mx in settings.DOMAINS_DEFAULT_MX:
|
|
defaults.append(AttrDict(
|
|
type=Record.MX,
|
|
value=mx
|
|
))
|
|
default_a = settings.DOMAINS_DEFAULT_A
|
|
if default_a:
|
|
defaults.append(AttrDict(
|
|
type=Record.A,
|
|
value=default_a
|
|
))
|
|
default_aaaa = settings.DOMAINS_DEFAULT_AAAA
|
|
if default_aaaa:
|
|
defaults.append(AttrDict(
|
|
type=Record.AAAA,
|
|
value=default_aaaa
|
|
))
|
|
return defaults
|
|
|
|
def record_is_implicit(self, record, types):
|
|
if record.type not in types:
|
|
if record.type is Record.NS:
|
|
if self.is_top:
|
|
return True
|
|
elif record.type is Record.SOA:
|
|
if self.is_top:
|
|
return True
|
|
else:
|
|
has_a = Record.A in types
|
|
has_aaaa = Record.AAAA in types
|
|
is_host = self.is_top or not types or has_a or has_aaaa
|
|
if is_host:
|
|
if record.type is Record.MX:
|
|
return True
|
|
elif not has_a and not has_aaaa:
|
|
return True
|
|
return False
|
|
|
|
def get_records(self):
|
|
types = set()
|
|
records = utils.RecordStorage()
|
|
for record in self.get_declared_records():
|
|
types.add(record.type)
|
|
if record.type == record.SOA:
|
|
# Update serial and insert at 0
|
|
value = record.value.split()
|
|
value[2] = str(self.serial)
|
|
records.insert(0, AttrDict(
|
|
type=record.SOA,
|
|
ttl=record.get_ttl(),
|
|
value=' '.join(value)
|
|
))
|
|
else:
|
|
records.append(AttrDict(
|
|
type=record.type,
|
|
ttl=record.get_ttl(),
|
|
value=record.value
|
|
))
|
|
for record in self.get_default_records():
|
|
if self.record_is_implicit(record, types):
|
|
if record.type is Record.SOA:
|
|
records.insert(0, record)
|
|
else:
|
|
records.append(record)
|
|
return records
|
|
|
|
def render_records(self):
|
|
result = ''
|
|
for record in self.get_records():
|
|
name = '{name}.{spaces}'.format(
|
|
name=self.name,
|
|
spaces=' ' * (37-len(self.name))
|
|
)
|
|
ttl = record.get('ttl', settings.DOMAINS_DEFAULT_TTL)
|
|
ttl = '{spaces}{ttl}'.format(
|
|
spaces=' ' * (7-len(ttl)),
|
|
ttl=ttl
|
|
)
|
|
type = '{type} {spaces}'.format(
|
|
type=record.type,
|
|
spaces=' ' * (7-len(record.type))
|
|
)
|
|
result += '{name} {ttl} IN {type} {value}\n'.format(
|
|
name=name,
|
|
ttl=ttl,
|
|
type=type,
|
|
value=record.value
|
|
)
|
|
return result
|
|
|
|
def has_default_mx(self):
|
|
records = self.get_records()
|
|
for record in records.by_type('MX'):
|
|
for default in settings.DOMAINS_DEFAULT_MX:
|
|
if record.value.endswith(' %s' % default.split()[-1]):
|
|
return True
|
|
return False
|
|
|
|
|
|
class Record(models.Model):
|
|
""" Represents a domain resource record """
|
|
MX = 'MX'
|
|
NS = 'NS'
|
|
CNAME = 'CNAME'
|
|
A = 'A'
|
|
AAAA = 'AAAA'
|
|
SRV = 'SRV'
|
|
TXT = 'TXT'
|
|
SPF = 'SPF'
|
|
SOA = 'SOA'
|
|
|
|
TYPE_CHOICES = (
|
|
(MX, "MX"),
|
|
(NS, "NS"),
|
|
(CNAME, "CNAME"),
|
|
(A, _("A (IPv4 address)")),
|
|
(AAAA, _("AAAA (IPv6 address)")),
|
|
(SRV, "SRV"),
|
|
(TXT, "TXT"),
|
|
(SPF, "SPF"),
|
|
)
|
|
|
|
VALIDATORS = {
|
|
MX: (validators.validate_mx_record,),
|
|
NS: (validators.validate_zone_label,),
|
|
A: (validate_ipv4_address,),
|
|
AAAA: (validate_ipv6_address,),
|
|
CNAME: (validators.validate_zone_label,),
|
|
TXT: (validate_ascii, validators.validate_quoted_record),
|
|
SPF: (validate_ascii, validators.validate_quoted_record),
|
|
SRV: (validators.validate_srv_record,),
|
|
SOA: (validators.validate_soa_record,),
|
|
}
|
|
|
|
domain = models.ForeignKey(Domain, verbose_name=_("domain"), related_name='records', on_delete=models.CASCADE)
|
|
ttl = models.CharField(_("TTL"), max_length=8, blank=True,
|
|
help_text=_("Record TTL, defaults to %s") % settings.DOMAINS_DEFAULT_TTL,
|
|
validators=[validators.validate_zone_interval])
|
|
type = models.CharField(_("type"), max_length=32, choices=TYPE_CHOICES)
|
|
# max_length bumped from 256 to 1024 (arbitrary) on August 2019.
|
|
value = models.CharField(_("value"), max_length=1024,
|
|
help_text=_("MX, NS and CNAME records sould end with a dot."))
|
|
|
|
def __str__(self):
|
|
return "%s %s IN %s %s" % (self.domain, self.get_ttl(), self.type, self.value)
|
|
|
|
def clean(self):
|
|
""" validates record value based on its type """
|
|
# validate value
|
|
if self.type != self.TXT:
|
|
self.value = self.value.lower().strip()
|
|
if self.type:
|
|
for validator in self.VALIDATORS.get(self.type, []):
|
|
try:
|
|
validator(self.value)
|
|
except ValidationError as error:
|
|
raise ValidationError({
|
|
'value': error,
|
|
})
|
|
|
|
def get_ttl(self):
|
|
return self.ttl or settings.DOMAINS_DEFAULT_TTL
|