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interfaces-geneve.py
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interfaces-geneve.py
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#!/usr/bin/env python3
#
# Copyright (C) 2019-2022 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from sys import exit
from netifaces import interfaces
from vyos.config import Config
from vyos.configdict import get_interface_dict
from vyos.configdict import is_node_changed
from vyos.configverify import verify_address
from vyos.configverify import verify_mtu_ipv6
from vyos.configverify import verify_bridge_delete
from vyos.configverify import verify_mirror_redirect
from vyos.configverify import verify_bond_bridge_member
from vyos.ifconfig import GeneveIf
from vyos import ConfigError
from vyos import airbag
airbag.enable()
def get_config(config=None):
"""
Retrive CLI config as dictionary. Dictionary can never be empty, as at least the
interface name will be added or a deleted flag
"""
if config:
conf = config
else:
conf = Config()
base = ['interfaces', 'geneve']
ifname, geneve = get_interface_dict(conf, base)
# GENEVE interfaces are picky and require recreation if certain parameters
# change. But a GENEVE interface should - of course - not be re-created if
# it's description or IP address is adjusted. Feels somehow logic doesn't it?
for cli_option in ['remote', 'vni', 'parameters']:
if is_node_changed(conf, base + [ifname, cli_option]):
geneve.update({'rebuild_required': {}})
return geneve
def verify(geneve):
if 'deleted' in geneve:
verify_bridge_delete(geneve)
return None
verify_mtu_ipv6(geneve)
verify_address(geneve)
verify_bond_bridge_member(geneve)
verify_mirror_redirect(geneve)
if 'remote' not in geneve:
raise ConfigError('Remote side must be configured')
if 'vni' not in geneve:
raise ConfigError('VNI must be configured')
return None
def generate(geneve):
return None
def apply(geneve):
# Check if GENEVE interface already exists
if 'rebuild_required' in geneve or 'delete' in geneve:
if geneve['ifname'] in interfaces():
g = GeneveIf(geneve['ifname'])
# GENEVE is super picky and the tunnel always needs to be recreated,
# thus we can simply always delete it first.
g.remove()
if 'deleted' not in geneve:
# Finally create the new interface
g = GeneveIf(**geneve)
g.update(geneve)
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)

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