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# This file is part of dnmgmt, a number resource management system
# Licensed under GNU General Public License v3 or later
# Written by Sebastian Lohff (seba@someserver.de)
from django.db import models
from django.urls import reverse
from whoisdb.models import MntdObject, WhoisObject, Contact, InetNum
import ipaddress
# generally allow domains for .dn to be created
# allow owners of a subnet to create reverse dns record?
class Nameserver(MntdObject):
handleSuffix = "NS"
# dns name
# ip address, if glue
# ipv4/ipv6 address?
handle = None
name = models.CharField(max_length=256)
glueIPv4 = models.GenericIPAddressField(protocol='IPv4', blank=True, null=True)
glueIPv6 = models.GenericIPAddressField(protocol='IPv6', blank=True, null=True)
admin_c = models.ManyToManyField(Contact)
def getPK(self):
return self.pk
def get_absolute_url(self):
return reverse("domains:nameserver-show", args=(self.pk,))
def __str__(self):
return self.name
def getAppName(self):
return "domains"
def getNoDeleteReasons(self):
# nameservers can always be deleted
return []
class Domain(MntdObject):
handle = None
handleSuffix = "DOM"
name = models.CharField(max_length=67, unique=True, db_index=True)
nameservers = models.ManyToManyField(Nameserver, blank=True)
admin_c = models.ManyToManyField(Contact)
def getPK(self):
return self.name
def getZone(self):
return self.name
def get_absolute_url(self):
return reverse("domains:domain-show", args=(self.name,))
def __str__(self):
return self.name
def getAppName(self):
return "domains"
def getNoDeleteReasons(self):
reasons = []
nameservers = Nameserver.objects.filter(name__endswith="." + self.name)
for ns in nameservers:
# FIXME: check if the nameserver has a glue record.... and also if it is maintained by us
reasons.append("Nameserver %s depends on this domain" % ns.name)
return reasons
@classmethod
def fixName(clazz, name):
if not name.endswith("."):
name += "."
return name.lower()
class ReverseZone(WhoisObject):
handle = None
parentNet = models.ForeignKey(InetNum)
address = models.GenericIPAddressField(db_index=True)
netmask = models.PositiveIntegerField()
nameservers = models.ManyToManyField(Nameserver)
def getPK(self):
return self.pk
def prefix(self):
""" Helper function, mainly used in templates """
return "%s/%s" % (self.address, self.netmask)
def getNetwork(self):
return ipaddress.ip_network(self.prefix())
def getZone(self):
net = self.parentNet.getNetwork()
if net.version == 4:
# does not work with python3.4
## for these we delegate the full domain
#if 0 < net.prefixlen < 32 and net.prefixlen % 8 == 0:
# zoneParts = net.reverse_pointer.split(".")
# return ".".join(zoneParts[1:])
#else:
# # return RFC2317 compliant zone
# return net.reverse_pointer
parts = list(reversed(str(net.network_address).split(".")))
domain = ".".join(parts[4 - net.prefixlen // 8:]) + ".in-addr.arpa."
if net.prefixlen % 8 == 0:
# clean cut!
return domain
else:
# RFC2317 compliant!
rfc2317Domain = "%s/%s.%s" % (parts[4 - net.prefixlen // 8 - 1], net.prefixlen, domain)
return rfc2317Domain
else:
## does not work with python3.4
## ipv6
## thefuck ipaddress lib... _the_ _fuck_
#zoneParts = net.reverse_pointer.split(".")[-2 - net.prefixlen // 4:]
#return ".".join(zoneParts)
parts = list(reversed(net.exploded.split("/")[0].replace(":", "")))[32 - net.prefixlen // 4:]
return ".".join(parts) + ".ip6.arpa."
def get_absolute_url(self):
return reverse("domains:reversezone-show", args=(self.pk,))
def getAppName(self):
return "domains"
def __str__(self):
return "%s @ %s" % (self.prefix(), self.parentNet)
def getNoDeleteReasons(self):
return []
def canEdit(self, user):
if self.parentNet:
return self.parentNet.canEdit(user)
else:
return False