#!/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/>. import os from sys import exit from vyos.config import Config from vyos.configdict import dict_merge from vyos.util import dict_search from vyos.util import sysctl_write from vyos.util import write_file from vyos.xml import defaults from vyos import ConfigError from vyos import airbag airbag.enable() def get_config(config=None): if config: conf = config else: conf = Config() base = ['system', 'ipv6'] 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): # configure multipath tmp = dict_search('multipath.layer4_hashing', opt) value = '1' if (tmp != None) else '0' sysctl_write('net.ipv6.fib_multipath_hash_policy', value) # Apply ND threshold values # table_size has a default value - thus the key always exists size = int(dict_search('neighbor.table_size', opt)) # Amount upon reaching which the records begin to be cleared immediately sysctl_write('net.ipv6.neigh.default.gc_thresh3', size) # Amount after which the records begin to be cleaned after 5 seconds sysctl_write('net.ipv6.neigh.default.gc_thresh2', size // 2) # Minimum number of stored records is indicated which is not cleared sysctl_write('net.ipv6.neigh.default.gc_thresh1', size // 8) # enable/disable IPv6 forwarding tmp = dict_search('disable_forwarding', opt) value = '0' if (tmp != None) else '1' write_file('/proc/sys/net/ipv6/conf/all/forwarding', value) # configure IPv6 strict-dad tmp = dict_search('strict_dad', opt) value = '2' if (tmp != None) else '1' for root, dirs, files in os.walk('/proc/sys/net/ipv6/conf'): for name in files: if name == 'accept_dad': write_file(os.path.join(root, name), value) if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)