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# Copyright 2019-2021 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 vyos.ifconfig import Interface
from vyos.util import dict_search
@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/
"""
iftype = 'geneve'
definition = {
**Interface.definition,
**{
'section': 'geneve',
'prefixes': ['gnv', ],
'bridgeable': True,
}
}
def _create(self):
# This table represents a mapping from VyOS internal config dict to
# arguments used by iproute2. For more information please refer to:
# - https://man7.org/linux/man-pages/man8/ip-link.8.html
mapping = {
'parameters.ip.dont_fragment': 'df set',
'parameters.ip.tos' : 'tos',
'parameters.ip.ttl' : 'ttl',
'parameters.ipv6.flowlabel' : 'flowlabel',
}
cmd = 'ip link add name {ifname} type {type} id {vni} remote {remote}'
for vyos_key, iproute2_key in mapping.items():
# dict_search will return an empty dict "{}" for valueless nodes like
# "parameters.nolearning" - thus we need to test the nodes existence
# by using isinstance()
tmp = dict_search(vyos_key, self.config)
if isinstance(tmp, dict):
cmd += f' {iproute2_key}'
elif tmp != None:
cmd += f' {iproute2_key} {tmp}'
self._cmd(cmd.format(**self.config))
# interface is always A/D down. It needs to be enabled explicitly
self.set_admin_state('down')
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