diff options
Diffstat (limited to 'src/conf_mode/system_ipv6.py')
| -rwxr-xr-x | src/conf_mode/system_ipv6.py | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/conf_mode/system_ipv6.py b/src/conf_mode/system_ipv6.py new file mode 100755 index 000000000..90a1a8087 --- /dev/null +++ b/src/conf_mode/system_ipv6.py @@ -0,0 +1,120 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2019-2023 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.configverify import verify_route_map +from vyos.template import render_to_string +from vyos.utils.dict import dict_search +from vyos.utils.file import write_file +from vyos.utils.process import is_systemd_service_active +from vyos.utils.system import sysctl_write +from vyos import ConfigError +from vyos import frr +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, + with_recursive_defaults=True) + + # When working with FRR we need to know the corresponding address-family + opt['afi'] = 'ipv6' + + # We also need the route-map information from the config + # + # XXX: one MUST always call this without the key_mangling() option! See + # vyos.configverify.verify_common_route_maps() for more information. + tmp = {'policy' : {'route-map' : conf.get_config_dict(['policy', 'route-map'], + get_first_key=True)}} + # Merge policy dict into "regular" config dict + opt = dict_merge(tmp, opt) + return opt + +def verify(opt): + if 'protocol' in opt: + for protocol, protocol_options in opt['protocol'].items(): + if 'route_map' in protocol_options: + verify_route_map(protocol_options['route_map'], opt) + return + +def generate(opt): + opt['frr_zebra_config'] = render_to_string('frr/zebra.route-map.frr.j2', opt) + return + +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) + + # During startup of vyos-router that brings up FRR, the service is not yet + # running when this script is called first. Skip this part and wait for initial + # commit of the configuration to trigger this statement + if is_systemd_service_active('frr.service'): + zebra_daemon = 'zebra' + # Save original configuration prior to starting any commit actions + frr_cfg = frr.FRRConfig() + + # The route-map used for the FIB (zebra) is part of the zebra daemon + frr_cfg.load_configuration(zebra_daemon) + frr_cfg.modify_section(r'ipv6 protocol \w+ route-map [-a-zA-Z0-9.]+', stop_pattern='(\s|!)') + if 'frr_zebra_config' in opt: + frr_cfg.add_before(frr.default_add_before, opt['frr_zebra_config']) + frr_cfg.commit_configuration(zebra_daemon) + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) |