firewall: add IPNetworkField

circle/dashboard/urls.py

@@ -5,5 +5,4 @@ from .views import IndexView, VmDetailView
 urlpatterns = patterns('',
                        url(r'^$', IndexView.as_view()),
                        url(r'^vm/(?P<id>\d+)/$', VmDetailView.as_view(),
-                           name='dashboard.views.detail'),
-)
+                           name='dashboard.views.detail'),)

circle/firewall/admin.py

@@ -38,8 +38,9 @@ class HostInline(contrib.admin.TabularInline):
 
 
 class VlanAdmin(admin.ModelAdmin):
-    list_display = ('vid', 'name', 'ipv4', 'net_ipv4', 'ipv6', 'net_ipv6',
+    list_display = ('vid', 'name', 'network4', 'network6',
                     'description', 'domain', 'snat_ip', )
+    search_fields = ('vid', 'name', 'network4', )
     ordering = ('vid', )
     inlines = (RuleInline, )
 

circle/firewall/fields.py

@@ -4,6 +4,8 @@ from django.db import models
 from django.utils.translation import ugettext_lazy as _
 from django.utils.ipv6 import is_valid_ipv6_address
 from south.modelsinspector import add_introspection_rules
+from django import forms
+from netaddr import IPNetwork, AddrFormatError
 import re
 
 
@@ -40,6 +42,77 @@ class MACAddressField(models.Field):
 add_introspection_rules([], ["firewall\.fields\.MACAddressField"])
 
 
+class IPNetworkFormField(forms.Field):
+    default_error_messages = {
+        'invalid': _(u'Enter a valid IP network. %s'),
+    }
+
+    def validate(self, value):
+        try:
+            return IPNetworkField.from_str(value, version=self.version)
+        except (AddrFormatError, TypeError), e:
+            raise ValidationError(self.default_error_messages['invalid']
+                                  % unicode(e))
+
+    def __init__(self, *args, **kwargs):
+        self.version = kwargs['version']
+        del kwargs['version']
+        super(IPNetworkFormField, self).__init__(*args, **kwargs)
+
+
+class IPNetworkField(models.Field):
+    description = _('IP Network object')
+    __metaclass__ = models.SubfieldBase
+
+    def __init__(self, version=4, *args, **kwargs):
+        kwargs['max_length'] = 100
+        self.version = version
+        super(IPNetworkField, self).__init__(*args, **kwargs)
+
+    @staticmethod
+    def from_str(value, version):
+        if not value or value == "":
+            return None
+
+        if isinstance(value, IPNetwork):
+            return value
+
+        return IPNetwork(value, version=version)
+
+    def get_internal_type(self):
+        return "CharField"
+
+    def to_python(self, value):
+        return IPNetworkField.from_str(value, self.version)
+
+    def get_db_prep_value(self, value, connection, prepared=False):
+        if not value or value == "":
+            return None
+
+        if isinstance(value, IPNetwork):
+            if self.version == 4:
+                return '.'.join(map(lambda x: "%03d" % x, value.ip.words))
+            else:
+                return ':'.join(map(lambda x: "%04X" % x, value.ip.words))
+        return value
+
+    def value_to_string(self, obj):
+        value = self._get_val_from_obj(obj)
+        return self.get_prep_value(value)
+
+    def clean(self, value, model_instance):
+        value = super(IPNetworkField, self).clean(value, model_instance)
+        return self.get_prep_value(value)
+
+    def formfield(self, **kwargs):
+        defaults = {'form_class': IPNetworkFormField}
+        defaults['version'] = self.version
+        defaults.update(kwargs)
+        return super(IPNetworkField, self).formfield(**defaults)
+
+add_introspection_rules([], ["^firewall\.fields\.IPNetworkField"])
+
+
 def val_alfanum(value):
     """Validate whether the parameter is a valid alphanumeric value."""
     if not alfanum_re.match(value):

circle/firewall/fw.py

@@ -203,7 +203,7 @@ class Firewall:
                 for d_vlan in s_vlan.snat_to.all():
                     self.iptablesnat('-A POSTROUTING -s %s -o %s -j SNAT '
                                      '--to-source %s' %
-                                     (s_vlan.net_ipv4(), d_vlan.interface,
+                                     (str(s_vlan.network4), d_vlan.interface,
                                       s_vlan.snat_ip))
 
         # hard-wired rules

circle/firewall/models.py

@@ -6,7 +6,7 @@ from django.forms import ValidationError
 from django.utils.translation import ugettext_lazy as _
 from firewall.fields import (MACAddressField, val_alfanum, val_reverse_domain,
                              val_domain, val_ipv4, val_ipv6, val_mx,
-                             ipv4_2_ipv6)
+                             ipv4_2_ipv6, IPNetworkField)
 from django.core.validators import MinValueValidator, MaxValueValidator
 import django.conf
 from django.db.models.signals import post_save
@@ -70,8 +70,9 @@ class Rule(models.Model):
                               help_text=_("If network address translation "
                                           "shoud be done."))
     nat_dport = models.IntegerField(blank=True, null=True,
-                                    help_text=_(
-                                        "Rewrite destination port number to."),
+                                    help_text=_("Rewrite destination port "
+                                                "number to this if NAT is "
+                                                "needed."),
                                     validators=[MinValueValidator(1),
                                                 MaxValueValidator(65535)])
     created_at = models.DateTimeField(
@@ -169,39 +170,31 @@ class Vlan(models.Model):
                             verbose_name=_('Name'),
                             help_text=_('The short name of the subnet.'),
                             validators=[val_alfanum])
-    prefix4 = models.IntegerField(
-        default=16, verbose_name=_('IPv4 prefix length'),
-        help_text=_('The prefix length of the IPv4 subnet.'))
-    prefix6 = models.IntegerField(
-        default=80, verbose_name=_('IPv6 prefix length'),
-        help_text=_('The prefix length of the IPv6 subnet.'))
     interface = models.CharField(max_length=20, unique=True,
                                  verbose_name=_('interface'), help_text=_(
                                      'The name of network interface the '
                                      'gateway should serve this network on. '
                                      'For example vlan0004 or eth2.'))
-    net4 = models.GenericIPAddressField(protocol='ipv4', unique=True,
-                                        verbose_name=_('IPv4 network'),
-                                        help_text=_('The network address of '
-                                                    'the IPv4 subnet.'))
-    net6 = models.GenericIPAddressField(protocol='ipv6', unique=True,
-                                        verbose_name=_('IPv6 network'),
-                                        help_text=_('The network address of '
-                                                    'the IPv6 subnet.'))
-    ipv4 = models.GenericIPAddressField(protocol='ipv4', unique=True,
-                                        verbose_name=_('IPv4 address'),
-                                        help_text=_(
-                                            'The IPv4 address of the gateway. '
-                                            'Recommended value is the last '
-                                            'valid address of the subnet, '
-                                            'for example '
-                                            '10.4.255.254 for 10.4.0.0/16.'))
-    ipv6 = models.GenericIPAddressField(protocol='ipv6',
-                                        unique=True,
-                                        verbose_name=_('IPv6 address'),
-                                        help_text=_(
-                                            'The IPv6 address of the '
-                                            'gateway.'))
+    network4 = IPNetworkField(unique=False,
+                              version=4,
+                              null=True,
+                              blank=True,
+                              verbose_name=_('IPv4 address/prefix'),
+                              help_text=_(
+                                  'The IPv4 address and the prefix length '
+                                  'of the gateway.'
+                                  'Recommended value is the last '
+                                  'valid address of the subnet, '
+                                  'for example '
+                                  '10.4.255.254/16 for 10.4.0.0/16.'))
+    network6 = IPNetworkField(unique=False,
+                              version=6,
+                              null=True,
+                              blank=True,
+                              verbose_name=_('IPv6 address/prefix'),
+                              help_text=_(
+                                  'The IPv6 address and the prefix length '
+                                  'of the gateway.'))
     snat_ip = models.GenericIPAddressField(protocol='ipv4', blank=True,
                                            null=True,
                                            verbose_name=_('NAT IP address'),
@@ -257,18 +250,37 @@ class Vlan(models.Model):
     def __unicode__(self):
         return self.name
 
-    def net_ipv6(self):
-        """String representation of selected IPv6 network."""
-        return self.net6 + "/" + unicode(self.prefix6)
-
-    def net_ipv4(self):
-        """String representation of selected IPv4 network."""
-        return self.net4 + "/" + unicode(self.prefix4)
-
     @models.permalink
     def get_absolute_url(self):
         return ('network.vlan', None, {'vid': self.vid})
 
+    @property
+    def net4(self):
+        return self.network4.network
+
+    @property
+    def ipv4(self):
+        return self.network4.ip
+
+    @property
+    def prefix4(self):
+        return self.network4.prefixlen
+
+    @property
+    def net6(self):
+        return self.network6.network
+
+    @property
+    def ipv6(self):
+        return self.network6.ip
+
+    @property
+    def prefix6(self):
+        return self.network6.prefixlen
+
+    def __unicode__(self):
+        return self.name
+
 
 class VlanGroup(models.Model):
     """
@@ -389,6 +401,14 @@ class Host(models.Model):
     def __unicode__(self):
         return self.hostname
 
+    @property
+    def incoming_rules(self):
+        return self.rules.filter(direction='1')
+
+    @property
+    def outgoing_rules(self):
+        return self.rules.filter(direction='0')
+
     def save(self, *args, **kwargs):
         id = self.id
         if not self.id and self.ipv6 == "auto":

requirements/base.txt

@@ -10,3 +10,4 @@ logutils==0.3.3
 netaddr==0.7.10
 South==0.8.1
 psycopg2==2.5.1
+netaddr==0.7.10