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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)
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