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+# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library. If not, see <http://www.gnu.org/licenses/>.
+
+from copy import deepcopy
+
+from vyos.ifconfig.interface import Interface
+
+
+@Interface.register
+class GeneveIf(Interface):
+ """
+ Geneve: Generic Network Virtualization Encapsulation
+
+ For more information please refer to:
+ https://tools.ietf.org/html/draft-gross-geneve-00
+ https://www.redhat.com/en/blog/what-geneve
+ https://developers.redhat.com/blog/2019/05/17/an-introduction-to-linux-virtual-interfaces-tunnels/#geneve
+ https://lwn.net/Articles/644938/
+ """
+
+ default = {
+ 'type': 'geneve',
+ 'vni': 0,
+ 'remote': '',
+ }
+ options = Interface.options + \
+ ['vni', 'remote']
+ definition = {
+ **Interface.definition,
+ **{
+ 'section': 'geneve',
+ 'prefixes': ['gnv', ],
+ 'bridgeable': True,
+ }
+ }
+
+ def _create(self):
+ cmd = 'ip link add name {ifname} type geneve id {vni} remote {remote}'.format(**self.config)
+ self._cmd(cmd)
+
+ # interface is always A/D down. It needs to be enabled explicitly
+ self.set_admin_state('down')
+
+ @classmethod
+ def get_config(cls):
+ """
+ GENEVE interfaces require a configuration when they are added using
+ iproute2. This static method will provide the configuration dictionary
+ used by this class.
+
+ Example:
+ >> dict = GeneveIf().get_config()
+ """
+ return deepcopy(cls.default)
+
+ def update(self, config):
+ """ General helper function which works on a dictionary retrived by
+ get_config_dict(). It's main intention is to consolidate the scattered
+ interface setup code and provide a single point of entry when workin
+ on any interface. """
+
+ # call base class first
+ super().update(config)
+
+ # Enable/Disable of an interface must always be done at the end of the
+ # derived class to make use of the ref-counting set_admin_state()
+ # function. We will only enable the interface if 'up' was called as
+ # often as 'down'. This is required by some interface implementations
+ # as certain parameters can only be changed when the interface is
+ # in admin-down state. This ensures the link does not flap during
+ # reconfiguration.
+ state = 'down' if 'disable' in config else 'up'
+ self.set_admin_state(state)