#!/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.layer4_hashing', 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)