Change reverse domain creation order

With refactoring the get_reverse_domain_name
function, we change the reverse domain checking to
a reverse order. In this way we check the lowest class
(more specific) reverse zone first. When an existing domain found we use it to create the reverse PTR records. If no one existing can be find, The most specific address will be used.

app/models.py

@@ -644,17 +644,21 @@ class Domain(db.Model):
         return {'status': 'ok', 'msg': 'Reverse lookup domain already exists'}
 
     def get_reverse_domain_name(self, reverse_host_address):
+        c = 1
         if re.search('ip6.arpa', reverse_host_address):
-            for i in range(31,3,-1):
+            for i in range(1,32,1):
                 address = re.search('((([a-f0-9]\.){'+ str(i) +'})(?P<ipname>.+6.arpa)\.?)', reverse_host_address)
                 if None != self.get_id_by_name(address.group('ipname')):
+                    c = i
                     break
+            return re.search('((([a-f0-9]\.){'+ str(c) +'})(?P<ipname>.+6.arpa)\.?)', reverse_host_address).group('ipname')
         else:
-            for i in range(3,0,-1):
+            for i in range(1,4,1):
                 address = re.search('((([0-9]+\.){'+ str(i) +'})(?P<ipname>.+r.arpa)\.?)', reverse_host_address)
                 if None != self.get_id_by_name(address.group('ipname')):
+                    c = i
                     break
-        return address.group('ipname')
+            return re.search('((([0-9]+\.){'+ str(c) +'})(?P<ipname>.+r.arpa)\.?)', reverse_host_address).group('ipname')
 
     def delete(self, domain_name):
         """