Reverse v6 validation, reverse domain name generation

domains/forms.py

@@ -175,6 +175,15 @@ class ReverseZoneForm(forms.ModelForm):
 
 		self.fields['nameservers'].queryset = self.fields['nameservers'].queryset.distinct()
 
+	def clean_prefix(self):
+		prefix = self.cleaned_data['prefix']
+
+		net = ipaddress.ip_network(prefix)
+		if net.version == 6 and net.prefixlen % 4 != 0:
+			raise forms.ValidationError("IPv6 reverse zone prefix length has to be a multiple of 4")
+
+		return prefix
+
 	def clean(self):
 		cleaned_data = super(ReverseZoneForm, self).clean()
 

domains/models.py

@@ -49,6 +49,9 @@ class Domain(MntdObject):
 	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,))
 
@@ -94,6 +97,24 @@ class ReverseZone(WhoisObject):
 	def getNetwork(self):
 		return ipaddress.ip_network(self.prefix())
 
+	def getZone(self):
+		net = self.parentNet.getNetwork()
+		if net.version == 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
+		else:
+			# ipv6
+			# thefuck ipaddress lib... _the_ _fuck_
+			zoneParts = net.reverse_pointer.split(".")[-2 - net.prefixlen // 4:]
+
+			return ".".join(zoneParts)
+
 	def get_absolute_url(self):
 		return reverse("domains:reversezone-show", args=(self.pk,))