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#!/usr/bin/env python3
#
# Copyright (C) 2019-2020 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 vyos.config import Config
from vyos.configdict import dict_merge
from vyos.util import call
from vyos.util import dict_search
from vyos.xml import defaults
from vyos import ConfigError
from vyos import airbag
airbag.enable()
def sysctl(name, value):
call(f'sysctl -wq {name}={value}')
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['system', 'ip']
opt = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
# We have gathered the dict representation of the CLI, but there are default
# options which we need to update into the dictionary retrived.
default_values = defaults(base)
opt = dict_merge(default_values, opt)
return opt
def verify(opt):
pass
def generate(opt):
pass
def apply(opt):
size = int(dict_search('arp.table_size', opt))
if size:
# apply ARP threshold values
sysctl('net.ipv4.neigh.default.gc_thresh3', str(size))
sysctl('net.ipv4.neigh.default.gc_thresh2', str(size // 2))
sysctl('net.ipv4.neigh.default.gc_thresh1', str(size // 8))
# enable/disable IPv4 forwarding
tmp = '1'
if 'disable_forwarding' in opt:
tmp = '0'
sysctl('net.ipv4.conf.all.forwarding', tmp)
tmp = '0'
# configure multipath - dict_search() returns an empty dict if key was found
if isinstance(dict_search('multipath.ignore_unreachable_nexthops', opt), dict):
tmp = '1'
sysctl('net.ipv4.fib_multipath_use_neigh', tmp)
tmp = '0'
if isinstance(dict_search('multipath.ignore_unreachable_nexthops', opt), dict):
tmp = '1'
sysctl('net.ipv4.fib_multipath_hash_policy', tmp)
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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