Merge branch 'feature-network-gui-improvements' into 'master'

Feature network gui improvements

* closes #358 Automatically select a free ipv4 address based on vlan (host creation)
* closes #357 Automatically generate ipv6 address from ipv4 (host creation/edit)
* closes #354 MAC address autocomplete
* closes #360 Add sensible default and help_text to Vlan.ipv6_template

See merge request !273

circle/firewall/fields.py

@@ -15,6 +15,7 @@
 # You should have received a copy of the GNU General Public License along
 # with CIRCLE.  If not, see <http://www.gnu.org/licenses/>.
 
+from string import ascii_letters
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
@@ -22,7 +23,7 @@ from django.utils.ipv6 import is_valid_ipv6_address
 from south.modelsinspector import add_introspection_rules
 from django import forms
 from netaddr import (IPAddress, IPNetwork, AddrFormatError, ZEROFILL,
-                     EUI, mac_unix)
+                     EUI, mac_unix, AddrConversionError)
 import re
 
 
@@ -31,7 +32,6 @@ domain_re = re.compile(r'^([A-Za-z0-9_-]\.?)+$')
 domain_wildcard_re = re.compile(r'^(\*\.)?([A-Za-z0-9_-]\.?)+$')
 ipv4_re = re.compile('^([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)$')
 reverse_domain_re = re.compile(r'^(%\([abcd]\)d|[a-z0-9.-])+$')
-ipv6_template_re = re.compile(r'^(%\([abcd]\)[dxX]|[A-Za-z0-9:-])+$')
 
 
 class mac_custom(mac_unix):
@@ -246,15 +246,60 @@ def val_reverse_domain(value):
         raise ValidationError(u'%s - invalid reverse domain name' % value)
 
 
-def is_valid_ipv6_template(value):
-    """Check whether the parameter is a valid ipv6 template."""
-    return ipv6_template_re.match(value) is not None
-
-
 def val_ipv6_template(value):
-    """Validate whether the parameter is a valid ipv6 template."""
-    if not is_valid_ipv6_template(value):
-        raise ValidationError(u'%s - invalid reverse ipv6 template' % value)
+    """Validate whether the parameter is a valid ipv6 template.
+
+    Normal use:
+    >>> val_ipv6_template("123::%(a)d:%(b)d:%(c)d:%(d)d")
+    >>> val_ipv6_template("::%(a)x:%(b)x:%(c)d:%(d)d")
+
+    Don't have to use all bytes from the left (no a):
+    >>> val_ipv6_template("::%(b)x:%(c)d:%(d)d")
+
+    But have to use all ones to the right (a, but no b):
+    >>> val_ipv6_template("::%(a)x:%(c)d:%(d)d")
+    Traceback (most recent call last):
+        ...
+    ValidationError: [u"template doesn't use parameter b"]
+
+    Detects valid templates building invalid ips:
+    >>> val_ipv6_template("xxx::%(a)d:%(b)d:%(c)d:%(d)d")
+    Traceback (most recent call last):
+        ...
+    ValidationError: [u'template renders invalid IPv6 address']
+
+    Also IPv4-compatible addresses are invalid:
+    >>> val_ipv6_template("::%(a)02x%(b)02x:%(c)d:%(d)d")
+    Traceback (most recent call last):
+        ...
+    ValidationError: [u'template results in IPv4 address']
+    """
+    tpl = {ascii_letters[i]: 255 for i in range(4)}
+    try:
+        v6 = value % tpl
+    except:
+        raise ValidationError(_('%s: invalid template') % value)
+
+    used = False
+    for i in ascii_letters[:4]:
+        try:
+            value % {k: tpl[k] for k in tpl if k != i}
+        except KeyError:
+            used = True  # ok, it misses this key
+        else:
+            if used:
+                raise ValidationError(
+                    _("template doesn't use parameter %s") % i)
+    try:
+        v6 = IPAddress(v6, 6)
+    except:
+        raise ValidationError(_('template renders invalid IPv6 address'))
+    try:
+        v6.ipv4()
+    except (AddrConversionError, AddrFormatError):
+        pass  # can't converted to ipv4 == it's real ipv6
+    else:
+        raise ValidationError(_('template results in IPv4 address'))
 
 
 def is_valid_ipv4_address(value):
@@ -284,12 +329,3 @@ def val_mx(value):
             domain_re.match(mx[1])):
         raise ValidationError(_("Bad MX address format. "
                                 "Should be: <priority>:<hostname>"))
-
-
-def convert_ipv4_to_ipv6(ipv6_template, ipv4):
-    """Convert IPv4 address string to IPv6 address string."""
-    m = ipv4.words
-    return IPAddress(ipv6_template % {'a': int(m[0]),
-                                      'b': int(m[1]),
-                                      'c': int(m[2]),
-                                      'd': int(m[3])})

circle/firewall/models.py

@@ -17,9 +17,11 @@
 # You should have received a copy of the GNU General Public License along
 # with CIRCLE.  If not, see <http://www.gnu.org/licenses/>.
 
-from itertools import islice, ifilter
+from string import ascii_letters
+from itertools import islice, ifilter, chain
+from math import ceil
 import logging
-from netaddr import IPSet, EUI, IPNetwork
+import random
 
 from django.contrib.auth.models import User
 from django.db import models
@@ -28,15 +30,17 @@ from django.utils.translation import ugettext_lazy as _
 from firewall.fields import (MACAddressField, val_alfanum, val_reverse_domain,
                              val_ipv6_template, val_domain, val_ipv4,
                              val_domain_wildcard,
-                             val_ipv6, val_mx, convert_ipv4_to_ipv6,
+                             val_ipv6, val_mx,
                              IPNetworkField, IPAddressField)
 from django.core.validators import MinValueValidator, MaxValueValidator
 import django.conf
 from django.db.models.signals import post_save, post_delete
-import random
+from celery.exceptions import TimeoutError
+from netaddr import IPSet, EUI, IPNetwork, IPAddress, ipv6_full
 
 from common.models import method_cache, WorkerNotFound, HumanSortField
 from firewall.tasks.local_tasks import reloadtask
+from firewall.tasks.remote_tasks import get_dhcp_clients
 from .iptables import IptRule
 from acl.models import AclBase
 
@@ -360,9 +364,19 @@ class Vlan(AclBase, models.Model):
                     'address is: "%(d)d.%(c)d.%(b)d.%(a)d.in-addr.arpa".'),
         default="%(d)d.%(c)d.%(b)d.%(a)d.in-addr.arpa")
     ipv6_template = models.TextField(
-        validators=[val_ipv6_template],
-        verbose_name=_('ipv6 template'),
-        default="2001:738:2001:4031:%(b)d:%(c)d:%(d)d:0")
+        blank=True,
+        help_text=_('Template for translating IPv4 addresses to IPv6. '
+                    'Automatically generated hosts in dual-stack networks '
+                    'will get this address. The template '
+                    'can contain four tokens: "%(a)d", "%(b)d", '
+                    '"%(c)d", and "%(d)d", representing the four bytes '
+                    'of the IPv4 address, respectively, in decimal notation. '
+                    'Moreover you can use any standard printf format '
+                    'specification like %(a)02x to get the first byte as two '
+                    'hexadecimal digits. Usual choices for mapping '
+                    '198.51.100.0/24 to 2001:0DB8:1:1::/64 would be '
+                    '"2001:db8:1:1:%(d)d::" and "2001:db8:1:1:%(d)02x00::".'),
+        validators=[val_ipv6_template], verbose_name=_('ipv6 template'))
     dhcp_pool = models.TextField(blank=True, verbose_name=_('DHCP pool'),
                                  help_text=_(
                                      'The address range of the DHCP pool: '
@@ -377,6 +391,87 @@ class Vlan(AclBase, models.Model):
     modified_at = models.DateTimeField(auto_now=True,
                                        verbose_name=_('modified at'))
 
+    def clean(self):
+        super(Vlan, self).clean()
+        if self.ipv6_template:
+            if not self.network6:
+                raise ValidationError(
+                    _("You cannot specify an IPv6 template if there is no "
+                      "IPv6 network set."))
+            for i in (self.network4[1], self.network4[-1]):
+                i6 = self.convert_ipv4_to_ipv6(i)
+                if i6 not in self.network6:
+                    raise ValidationError(
+                        _("%(ip6)s (translated from %(ip4)s) is outside of "
+                          "the IPv6 network.") % {"ip4": i, "ip6": i6})
+        if self.network6:
+            tpl, prefixlen = self._magic_ipv6_template(self.network4,
+                                                       self.network6)
+            if not self.ipv6_template:
+                self.ipv6_template = tpl
+            if not self.host_ipv6_prefixlen:
+                self.host_ipv6_prefixlen = prefixlen
+
+    @staticmethod
+    def _host_bytes(prefixlen, maxbytes):
+        return int(ceil((maxbytes - prefixlen / 8.0)))
+
+    @staticmethod
+    def _append_hexa(s, v, lasthalf):
+        if lasthalf:  # can use last half word
+            assert s[-1] == "0" or s[-1].endswith("00")
+            if s[-1].endswith("00"):
+                s[-1] = s[-1][:-2]
+            s[-1] += "%({})02x".format(v)
+            s[-1].lstrip("0")
+        else:
+            s.append("%({})02x00".format(v))
+
+    @classmethod
+    def _magic_ipv6_template(cls, network4, network6, verbose=None):
+        """Offer a sensible ipv6_template value.
+
+        Based on prefix lengths the method magically selects verbose (decimal)
+        format:
+        >>> Vlan._magic_ipv6_template(IPNetwork("198.51.100.0/24"),
+        ...                           IPNetwork("2001:0DB8:1:1::/64"))
+        ('2001:db8:1:1:%(d)d::', 80)
+
+        However you can explicitly select non-verbose, i.e. hexa format:
+        >>> Vlan._magic_ipv6_template(IPNetwork("198.51.100.0/24"),
+        ...                           IPNetwork("2001:0DB8:1:1::/64"), False)
+        ('2001:db8:1:1:%(d)02x00::', 72)
+        """
+        host4_bytes = cls._host_bytes(network4.prefixlen, 4)
+        host6_bytes = cls._host_bytes(network6.prefixlen, 16)
+        if host4_bytes > host6_bytes:
+            raise ValidationError(
+                _("IPv6 network is too small to map IPv4 addresses to it."))
+        letters = ascii_letters[4-host4_bytes:4]
+        remove = host6_bytes // 2
+        ipstr = network6.network.format(ipv6_full)
+        s = ipstr.split(":")[0:-remove]
+        if verbose is None:  # use verbose format if net6 much wider
+            verbose = 2 * (host4_bytes + 1) < host6_bytes
+        if verbose:
+            for i in letters:
+                s.append("%({})d".format(i))
+        else:
+            remain = host6_bytes
+            for i in letters:
+                cls._append_hexa(s, i, remain % 2 == 1)
+                remain -= 1
+        if host6_bytes > host4_bytes:
+            s.append(":")
+        tpl = ":".join(s)
+        # compute prefix length
+        mask = int(IPAddress(tpl % {"a": 1, "b": 1, "c": 1, "d": 1}))
+        prefixlen = 128
+        while mask % 2 == 0:
+            mask /= 2
+            prefixlen -= 1
+        return (tpl, prefixlen)
+
     def __unicode__(self):
         return "%s - %s" % ("managed" if self.managed else "unmanaged",
                             self.name)
@@ -402,7 +497,7 @@ class Vlan(AclBase, models.Model):
             logger.debug("Found unused IPv4 address %s.", ipv4)
             ipv6 = None
             if self.network6 is not None:
-                ipv6 = convert_ipv4_to_ipv6(self.ipv6_template, ipv4)
+                ipv6 = self.convert_ipv4_to_ipv6(ipv4)
                 if ipv6 in used_v6:
                     continue
                 else:
@@ -411,6 +506,20 @@ class Vlan(AclBase, models.Model):
         else:
             raise ValidationError(_("All IP addresses are already in use."))
 
+    def convert_ipv4_to_ipv6(self, ipv4):
+        """Convert IPv4 address string to IPv6 address string."""
+        if isinstance(ipv4, basestring):
+            ipv4 = IPAddress(ipv4, 4)
+        nums = {ascii_letters[i]: int(ipv4.words[i]) for i in range(4)}
+        return IPAddress(self.ipv6_template % nums)
+
+    def get_dhcp_clients(self):
+        macs = set(i.mac for i in self.host_set.all())
+        return [{"mac": k, "ip": v["ip"], "hostname": v["hostname"]}
+                for k, v in chain(*(fw.get_dhcp_clients().iteritems()
+                                    for fw in Firewall.objects.all() if fw))
+                if v["interface"] == self.name and EUI(k) not in macs]
+
 
 class VlanGroup(models.Model):
     """
@@ -581,8 +690,7 @@ class Host(models.Model):
 
     def save(self, *args, **kwargs):
         if not self.id and self.ipv6 == "auto":
-            self.ipv6 = convert_ipv4_to_ipv6(self.vlan.ipv6_template,
-                                             self.ipv4)
+            self.ipv6 = self.vlan.convert_ipv4_to_ipv6(self.ipv4)
         self.full_clean()
 
         super(Host, self).save(*args, **kwargs)
@@ -838,7 +946,7 @@ class Firewall(models.Model):
         return self.name
 
     @method_cache(30)
-    def get_remote_queue_name(self, queue_id):
+    def get_remote_queue_name(self, queue_id="firewall"):
         """Returns the name of the remote celery queue for this node.
 
         Throws Exception if there is no worker on the queue.
@@ -851,6 +959,20 @@ class Firewall(models.Model):
         else:
             raise WorkerNotFound()
 
+    @method_cache(20)
+    def get_dhcp_clients(self):
+        try:
+            return get_dhcp_clients.apply_async(
+                queue=self.get_remote_queue_name(), expires=60).get(timeout=2)
+        except TimeoutError:
+            logger.info("get_dhcp_clients task timed out")
+        except IOError:
+            logger.exception("get_dhcp_clients failed. "
+                             "maybe syslog isn't readble by firewall worker")
+        except:
+            logger.exception("get_dhcp_clients failed")
+        return None
+
 
 class Domain(models.Model):
     name = models.CharField(max_length=40, validators=[val_domain],

circle/firewall/tasks/remote_tasks.py

@@ -62,5 +62,6 @@ def reload_blacklist(data):
 
 
 @celery.task(name='firewall.get_dhcp_clients')
-def get_dhcp_clients(data):
+def get_dhcp_clients():
+    # {'00:21:5a:73:72:cd': {'interface': 'OFF', 'ip': None, 'hostname': None}}
     pass

circle/firewall/tests/test_firewall.py

@@ -78,6 +78,7 @@ class GetNewAddressTestCase(TestCase):
         self.vlan = Vlan(vid=1, name='test', network4='10.0.0.0/29',
                          network6='2001:738:2001:4031::/80', domain=d,
                          owner=self.u1)
+        self.vlan.clean()
         self.vlan.save()
         self.vlan.host_set.all().delete()
         for i in [1] + range(3, 6):
@@ -85,6 +86,9 @@ class GetNewAddressTestCase(TestCase):
                  ipv4='10.0.0.%d' % i, vlan=self.vlan,
                  owner=self.u1).save()
 
+    def tearDown(self):
+        self.vlan.delete()
+
     def test_new_addr_w_empty_vlan(self):
         self.vlan.host_set.all().delete()
         self.vlan.get_new_address()
@@ -96,12 +100,6 @@ class GetNewAddressTestCase(TestCase):
                  owner=self.u1).save()
         self.assertRaises(ValidationError, self.vlan.get_new_address)
 
-    def test_all_addr_in_use_w_ipv6(self):
-        Host(hostname='h-x', mac='01:02:03:04:05:06',
-             ipv4='10.0.0.6', ipv6='2001:738:2001:4031:0:0:2:0',
-             vlan=self.vlan, owner=self.u1).save()
-        self.assertRaises(ValidationError, self.vlan.get_new_address)
-
     def test_new_addr(self):
         used_v4 = IPSet(self.vlan.host_set.values_list('ipv4', flat=True))
         assert self.vlan.get_new_address()['ipv4'] not in used_v4

circle/network/forms.py

@@ -15,13 +15,13 @@
 # You should have received a copy of the GNU General Public License along
 # with CIRCLE.  If not, see <http://www.gnu.org/licenses/>.
 
-from django.forms import ModelForm
+from django.forms import ModelForm, widgets
 from django.core.urlresolvers import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
 
 from crispy_forms.helper import FormHelper
 from crispy_forms.layout import Layout, Fieldset, Div, Submit, BaseInput
-from crispy_forms.bootstrap import FormActions
+from crispy_forms.bootstrap import FormActions, FieldWithButtons, StrictButton
 
 from firewall.models import (Host, Vlan, Domain, Group, Record, BlacklistItem,
                              Rule, VlanGroup, SwitchPort)
@@ -122,8 +122,12 @@ class HostForm(ModelForm):
             Fieldset(
                 _('Network'),
                 'vlan',
-                'ipv4',
-                'ipv6',
+                FieldWithButtons('ipv4', StrictButton(
+                    '<i class="fa fa-magic"></i>', css_id="ipv4-magic",
+                    title=_("Generate random address."))),
+                FieldWithButtons('ipv6', StrictButton(
+                    '<i class="fa fa-magic"></i>', css_id="ipv6-magic",
+                    title=_("Generate IPv6 pair of IPv4 address."))),
                 'shared_ip',
                 'external_ipv4',
             ),
@@ -252,7 +256,9 @@ class VlanForm(ModelForm):
             Fieldset(
                 _('IPv6'),
                 'network6',
-                'ipv6_template',
+                FieldWithButtons('ipv6_template', StrictButton(
+                    '<i class="fa fa-magic"></i>', css_id="ipv6-tpl-magic",
+                    title=_("Generate sensible template."))),
                 'host_ipv6_prefixlen',
             ),
             Fieldset(
@@ -277,6 +283,9 @@ class VlanForm(ModelForm):
 
     class Meta:
         model = Vlan
+        widgets = {
+            'ipv6_template': widgets.TextInput,
+        }
 
 
 class VlanGroupForm(ModelForm):

circle/network/static/js/network.js

@@ -28,6 +28,49 @@ function getURLParameter(name) {
     );
 }
 
+function doBlink(id, count) {
+    if (count > 0) {
+        $(id).parent().delay(200).queue(function() {
+            $(this).delay(200).queue(function() {
+                $(this).removeClass("has-warning").dequeue();
+                doBlink(id, count-1);});
+            $(this).addClass("has-warning").dequeue()
+        });
+    }
+}
+
 $(function() {
   $("[title]").tooltip();
+
+$("#ipv6-magic").click(function() {
+    $.ajax({url: window.location,
+            data: {ipv4: $("[name=ipv4]").val(),
+                   vlan: $("[name=vlan]").val()},
+            success: function(data) {
+                       $("[name=ipv6]").val(data.ipv6);
+            }});
+});
+$("#ipv4-magic").click(function() {
+    $.ajax({url: window.location,
+            data: {vlan: $("[name=vlan]").val()},
+            success: function(data) {
+                $("[name=ipv4]").val(data.ipv4);
+                if ($("[name=ipv6]").val() != data.ipv6) {
+                    doBlink("[name=ipv6]", 3);
+                }
+                $("[name=ipv6]").val(data.ipv6);
+            }});
+});
+$("#ipv6-tpl-magic").click(function() {
+    $.ajax({url: window.location,
+            data: {network4: $("[name=network4]").val(),
+                   network6: $("[name=network6]").val()},
+            success: function(data) {
+                       $("[name=ipv6_template]").val(data.ipv6_template);
+                       if ($("[name=host_ipv6_prefixlen]").val() != data.host_ipv6_prefixlen) {
+                           doBlink("[name=host_ipv6_prefixlen]", 3);
+                       }
+                       $("[name=host_ipv6_prefixlen]").val(data.host_ipv6_prefixlen);
+            }});
+});
 });

circle/network/tables.py

@@ -15,14 +15,30 @@
 # You should have received a copy of the GNU General Public License along
 # with CIRCLE.  If not, see <http://www.gnu.org/licenses/>.
 
+from netaddr import EUI
 from django.utils.translation import ugettext_lazy as _
+from django.utils.html import format_html
 
 from django_tables2 import Table, A
-from django_tables2.columns import LinkColumn, TemplateColumn
+from django_tables2.columns import LinkColumn, TemplateColumn, Column
 
 from firewall.models import Host, Vlan, Domain, Group, Record, Rule, SwitchPort
 
 
+class MACColumn(Column):
+    def render(self, value):
+        if isinstance(value, basestring):
+            try:
+                value = EUI(value)
+            except:
+                return value
+        try:
+            return format_html('<abbr title="{0}">{1}</abbr>',
+                               value.oui.registration().org, value)
+        except:
+            return value
+
+
 class BlacklistItemTable(Table):
     ipv4 = LinkColumn('network.blacklist', args=[A('pk')])
 
@@ -55,9 +71,7 @@ class GroupTable(Table):
 
 class HostTable(Table):
     hostname = LinkColumn('network.host', args=[A('pk')])
-    mac = TemplateColumn(
-        template_name="network/columns/mac.html"
-    )
+    mac = MACColumn()
 
     class Meta:
         model = Host
@@ -108,6 +122,20 @@ class SmallHostTable(Table):
         attrs = {'class': 'table table-striped table-condensed'}
         fields = ('hostname', 'ipv4')
         order_by = ('vlan', 'hostname', )
+        empty_text = _("No hosts.")
+
+
+class SmallDhcpTable(Table):
+    mac = MACColumn(verbose_name=_("MAC address"))
+    hostname = Column(verbose_name=_("hostname"))
+    ip = Column(verbose_name=_("requested IP"))
+    register = TemplateColumn(
+        template_name="network/columns/host-register.html",
+        attrs={"th": {"style": "display: none;"}})
+
+    class Meta:
+        attrs = {'class': 'table table-striped table-condensed'}
+        empty_text = _("No hosts.")
 
 
 class RecordTable(Table):

circle/network/templates/network/columns/host-register.html

+{% load i18n %}
+<a href="{% url "network.host_create" %}?vlan={{ object.pk }}&amp;mac={{ record.mac }}&amp;hostname={{ record.hostname }}&amp;ipv4={{ record.ip }}"
+    title="{% trans "register host" %}"><i class="fa fa-plus-circle"></i></a>

circle/network/templates/network/columns/mac.html

-{% load i18n %}
-
-<span title="{% blocktrans with vendor=record.hw_vendor|default:"n/a" %}Vendor: {{vendor}}{% endblocktrans %}">{{ record.mac }}</span>

circle/network/templates/network/vlan-edit.html

@@ -19,9 +19,16 @@
   </div>
   <div class="col-sm-6">
     <div class="page-header">
+      <a href="{% url "network.host_create" %}?vlan={{vlan.pk}}" class="btn btn-success pull-right"><i class="fa fa-plus-circle"></i> {% trans "Create a new host" %}</a>
       <h3>{% trans "Host list" %}</h3>
     </div>
     {% render_table host_list %}
+
+    <div class="page-header">
+      <h3>{% trans "Unregistered hosts" %}</h3>
+    </div>
+    {% render_table dhcp_list %}
+
     <div class="page-header">
       <h3>{% trans "Manage access" %}</h3>
     </div>

circle/network/views.py

@@ -15,11 +15,13 @@
 # You should have received a copy of the GNU General Public License along
 # with CIRCLE.  If not, see <http://www.gnu.org/licenses/>.
 
+from netaddr import IPNetwork
 from django.views.generic import (TemplateView, UpdateView, DeleteView,
                                   CreateView)
+from django.core.exceptions import ValidationError
 from django.core.urlresolvers import reverse_lazy
-from django.shortcuts import render, redirect
-from django.http import HttpResponse
+from django.shortcuts import render, redirect, get_object_or_404
+from django.http import HttpResponse, Http404
 
 from django_tables2 import SingleTableView
 
@@ -29,7 +31,7 @@ from vm.models import Interface
 from .tables import (HostTable, VlanTable, SmallHostTable, DomainTable,
                      GroupTable, RecordTable, BlacklistItemTable, RuleTable,
                      VlanGroupTable, SmallRuleTable, SmallGroupRuleTable,
-                     SmallRecordTable, SwitchPortTable)
+                     SmallRecordTable, SwitchPortTable, SmallDhcpTable, )
 from .forms import (HostForm, VlanForm, DomainForm, GroupForm, RecordForm,
                     BlacklistItemForm, RuleForm, VlanGroupForm, SwitchPortForm)
 
@@ -41,10 +43,36 @@ from braces.views import LoginRequiredMixin, SuperuserRequiredMixin
 # from django.db.models import Q
 from operator import itemgetter
 from itertools import chain
-import json
 from dashboard.views import AclUpdateView
 from dashboard.forms import AclUserOrGroupAddForm
 
+from django.utils import simplejson
+
+try:
+    from django.http import JsonResponse
+except ImportError:
+    class JsonResponse(HttpResponse):
+        """JSON response for Django < 1.7
+        https://gist.github.com/philippeowagner/3179eb475fe1795d6515
+        """
+        def __init__(self, content, mimetype='application/json',
+                     status=None, content_type=None):
+            super(JsonResponse, self).__init__(
+                content=simplejson.dumps(content),
+                mimetype=mimetype,
+                status=status,
+                content_type=content_type)
+
+
+class MagicMixin(object):
+
+    def get(self, *args, **kwargs):
+        if self.request.is_ajax():
+            result = self._get_ajax(*args, **kwargs)
+            return JsonResponse({k: unicode(result[k] or "") for k in result})
+        else:
+            return super(MagicMixin, self).get(*args, **kwargs)
+
 
 class InitialOwnerMixin(FormMixin):
     def get_initial(self):
@@ -310,6 +338,25 @@ class GroupDelete(LoginRequiredMixin, SuperuserRequiredMixin, DeleteView):
         return context
 
 
+class HostMagicMixin(MagicMixin):
+    def _get_ajax(self, *args, **kwargs):
+        GET = self.request.GET
+        result = {}
+        vlan = get_object_or_404(Vlan.objects, pk=GET.get("vlan", ""))
+        if "ipv4" in GET:
+            try:
+                result["ipv6"] = vlan.convert_ipv4_to_ipv6(GET["ipv4"]) or ""
+            except:
+                result["ipv6"] = ""
+        else:
+            try:
+                result.update(vlan.get_new_address())
+            except ValidationError:
+                result["ipv4"] = ""
+                result["ipv6"] = ""
+        return result
+
+
 class HostList(LoginRequiredMixin, SuperuserRequiredMixin, SingleTableView):
     model = Host
     table_class = HostTable
@@ -331,15 +378,15 @@ class HostList(LoginRequiredMixin, SuperuserRequiredMixin, SingleTableView):
         return data
 
 
-class HostDetail(LoginRequiredMixin, SuperuserRequiredMixin,
+class HostDetail(HostMagicMixin, LoginRequiredMixin, SuperuserRequiredMixin,
                  SuccessMessageMixin, UpdateView):
     model = Host
     template_name = "network/host-edit.html"
     form_class = HostForm
     success_message = _(u'Successfully modified host %(hostname)s!')
 
-    def get(self, request, *args, **kwargs):
-        if request.is_ajax():
+    def _get_ajax(self, *args, **kwargs):
+        if "vlan" not in self.request.GET:
             host = Host.objects.get(pk=kwargs['pk'])
             host = {
                 'hostname': host.hostname,
@@ -347,11 +394,13 @@ class HostDetail(LoginRequiredMixin, SuperuserRequiredMixin,
                 'ipv6': str(host.ipv6),
                 'fqdn': host.get_fqdn()
             }
-            return HttpResponse(json.dumps(host),
-                                content_type="application/json")
+            return host
         else:
-            self.object = self.get_object()
-            return super(HostDetail, self).get(request, *args, **kwargs)
+            return super(HostDetail, self)._get_ajax(*args, **kwargs)
+
+    def get(self, request, *args, **kwargs):
+        self.object = self.get_object()
+        return super(HostDetail, self).get(request, *args, **kwargs)
 
     def post(self, request, *args, **kwargs):
         pk = self.kwargs.get('pk')
@@ -402,13 +451,29 @@ class HostDetail(LoginRequiredMixin, SuperuserRequiredMixin,
             return reverse_lazy('network.host', kwargs=self.kwargs)
 
 
-class HostCreate(LoginRequiredMixin, SuperuserRequiredMixin,
+class HostCreate(HostMagicMixin, LoginRequiredMixin, SuperuserRequiredMixin,
                  SuccessMessageMixin, InitialOwnerMixin, CreateView):
     model = Host
     template_name = "network/host-create.html"
     form_class = HostForm
     success_message = _(u'Successfully created host %(hostname)s!')
 
+    def get_initial(self):
+        initial = super(HostCreate, self).get_initial()
+
+        for i in ("vlan", "mac", "hostname"):
+            if i in self.request.GET and i not in self.request.POST:
+                initial[i] = self.request.GET[i]
+        if "vlan" in initial:
+            if not initial['vlan'].isnumeric():
+                raise Http404()
+            vlan = get_object_or_404(Vlan.objects, pk=initial['vlan'])
+            try:
+                initial.update(vlan.get_new_address())
+            except ValidationError as e:
+                messages.error(self.request, e.message)
+        return initial
+
 
 class HostDelete(LoginRequiredMixin, SuperuserRequiredMixin, DeleteView):
     model = Host
@@ -644,7 +709,21 @@ class VlanAclUpdateView(AclUpdateView):
     model = Vlan
 
 
-class VlanDetail(LoginRequiredMixin, SuperuserRequiredMixin,
+class VlanMagicMixin(MagicMixin):
+    def _get_ajax(self, *args, **kwargs):
+        GET = self.request.GET
+        result = {}
+        if "network4" in GET and "network6" in GET:
+            try:
+                result["ipv6_template"], result["host_ipv6_prefixlen"] = (
+                    Vlan._magic_ipv6_template(IPNetwork(GET['network4']),
+                                              IPNetwork(GET['network6'])))
+            except:
+                result["ipv6_template"] = result["host_ipv6_prefixlen"] = ""
+        return result
+
+
+class VlanDetail(VlanMagicMixin, LoginRequiredMixin, SuperuserRequiredMixin,
                  SuccessMessageMixin, UpdateView):
     model = Vlan
     template_name = "network/vlan-edit.html"
@@ -656,6 +735,7 @@ class VlanDetail(LoginRequiredMixin, SuperuserRequiredMixin,
     def get_context_data(self, **kwargs):
         context = super(VlanDetail, self).get_context_data(**kwargs)
         context['host_list'] = SmallHostTable(self.object.host_set.all())
+        context['dhcp_list'] = SmallDhcpTable(self.object.get_dhcp_clients())
         context['vlan_vid'] = self.kwargs.get('vid')
         context['acl'] = AclUpdateView.get_acl_data(
             self.object, self.request.user, 'network.vlan-acl')
@@ -665,7 +745,7 @@ class VlanDetail(LoginRequiredMixin, SuperuserRequiredMixin,
     success_url = reverse_lazy('network.vlan_list')
 
 
-class VlanCreate(LoginRequiredMixin, SuperuserRequiredMixin,
+class VlanCreate(VlanMagicMixin, LoginRequiredMixin, SuperuserRequiredMixin,
                  SuccessMessageMixin, InitialOwnerMixin, CreateView):
     model = Vlan
     template_name = "network/vlan-create.html"

circle/vm/tests/test_models.py

@@ -177,6 +177,7 @@ class InterfaceTestCase(TestCase):
         d.save()
         v = Vlan(vid=55, network4='127.0.0.1/8',
                  network6='2001::1/32', domain=d)
+        v.clean()
         v.save()
         Interface.create(i, v, managed=True, owner=owner)