networks: Ability to configure generic interfaces

After batman-adv kernel driver takes over the Wi-Fi network interface
and provides a bat0 interface, this interface shows up as device type
'batadv'.  This type is not recognized by network manager is dealt with
as a generic device.  Configuring this device for IPv4/IPv6 in
auto/shared mode etc. works fine.  So, add the ability to configure
generic interfaces.

plinth/modules/networks/forms.py

@@ -124,6 +124,21 @@ available over this interfaces. Select Internal only for trusted networks.'),
         return ipv4
 
 
+class GenericForm(ConnectionForm):
+    """Form to create/edit a generic connection."""
+    def __init__(self, *args, **kwargs):
+        """Initialize the form, populate interface choices."""
+        super(GenericForm, self).__init__(*args, **kwargs)
+        choices = self._get_interface_choices(nm.DeviceType.GENERIC)
+        self.fields['interface'].choices = choices
+
+    def get_settings(self):
+        """Return settings dict from cleaned data."""
+        settings = super().get_settings()
+        settings['common']['type'] = 'generic'
+        return settings
+
+
 class EthernetForm(ConnectionForm):
     """Form to create/edit a ethernet connection."""
     def __init__(self, *args, **kwargs):

plinth/modules/networks/networks.py

@@ -23,8 +23,8 @@ from django.utils.translation import ugettext as _, ugettext_lazy
 from django.views.decorators.http import require_POST
 from logging import Logger
 
-from .forms import (ConnectionTypeSelectForm, EthernetForm, PPPoEForm,
+from .forms import (ConnectionTypeSelectForm, EthernetForm, GenericForm,
-                    WifiForm)
+                    PPPoEForm, WifiForm)
 from plinth import network
 
 
@@ -113,7 +113,9 @@ def edit(request, uuid):
     form_data = {'name': connection.get_id()}
 
     if request.method == 'POST':
-        if connection.get_connection_type() == '802-11-wireless':
+        if connection.get_connection_type() == 'generic':
+            form = GenericForm(request.POST)
+        elif connection.get_connection_type() == '802-11-wireless':
             form = WifiForm(request.POST)
         elif connection.get_connection_type() == '802-3-ethernet':
             form = EthernetForm(request.POST)
@@ -156,7 +158,9 @@ def edit(request, uuid):
             if second_dns:
                 form_data['ipv4_second_dns'] = second_dns
 
-        if settings_connection.get_connection_type() == '802-11-wireless':
+        if settings_connection.get_connection_type() == 'generic':
+            form = GenericForm(form_data)
+        elif settings_connection.get_connection_type() == '802-11-wireless':
             settings_wireless = connection.get_setting_wireless()
             form_data['ssid'] = settings_wireless.get_ssid().get_data()
             form_data['mode'] = settings_wireless.get_mode()
@@ -242,7 +246,9 @@ def add(request):
         form = ConnectionTypeSelectForm(request.POST)
         if form.is_valid():
             connection_type = form.cleaned_data['connection_type']
-            if connection_type == '802-3-ethernet':
+            if connection_type == 'generic':
+                return redirect(reverse_lazy('networks:add_generic'))
+            elif connection_type == '802-3-ethernet':
                 return redirect(reverse_lazy('networks:add_ethernet'))
             elif connection_type == '802-11-wireless':
                 return redirect(reverse_lazy('networks:add_wifi'))
@@ -256,6 +262,24 @@ def add(request):
                                  'form': form})
 
 
+def add_generic(request):
+    """Serve generic connection create form."""
+    form = None
+
+    if request.method == 'POST':
+        form = GenericForm(request.POST)
+        if form.is_valid():
+            network.add_connection(form.get_settings())
+            return redirect(reverse_lazy('networks:index'))
+    else:
+        form = GenericForm()
+
+    return TemplateResponse(request, 'connections_create.html',
+                            {'title': _('Adding New Generic Connection'),
+                             'subsubmenu': subsubmenu,
+                             'form': form})
+
+
 def add_ethernet(request):
     """Serve ethernet connection create form."""
     form = None

plinth/modules/networks/urls.py

@@ -34,6 +34,7 @@ urlpatterns = [
         name='deactivate'),
     url(r'^sys/networks/scan/$', views.scan, name='scan'),
     url(r'^sys/networks/add/$', views.add, name='add'),
+    url(r'^sys/networks/add/generic/$', views.add_generic, name='add_generic'),
     url(r'^sys/networks/add/ethernet/$', views.add_ethernet,
         name='add_ethernet'),
     url(r'^sys/networks/add/pppoe/$', views.add_pppoe, name='add_pppoe'),

plinth/network.py

@@ -36,7 +36,8 @@ logger = logging.getLogger(__name__)
 CONNECTION_TYPE_NAMES = collections.OrderedDict([
     ('802-3-ethernet', _('Ethernet')),
     ('802-11-wireless', _('Wi-Fi')),
-    ('pppoe', _('PPPoE'))
+    ('pppoe', _('PPPoE')),
+    ('generic', _('Generic')),
 ])