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authorChristian Breunig <christian@breunig.cc>2023-12-30 23:25:20 +0100
committerChristian Breunig <christian@breunig.cc>2023-12-31 23:49:48 +0100
commit4ef110fd2c501b718344c72d495ad7e16d2bd465 (patch)
treee98bf08f93c029ec4431a3b6ca078e7562e0cc58 /src/conf_mode/system_ipv6.py
parent2286b8600da6c631b17e1d5b9b341843e50f9abf (diff)
downloadvyos-1x-4ef110fd2c501b718344c72d495ad7e16d2bd465.tar.gz
vyos-1x-4ef110fd2c501b718344c72d495ad7e16d2bd465.zip
T5474: establish common file name pattern for XML conf mode commands
We will use _ as CLI level divider. The XML definition filename and also the Python helper should match the CLI node. Example: set interfaces ethernet -> interfaces_ethernet.xml.in set interfaces bond -> interfaces_bond.xml.in set service dhcp-server -> service_dhcp-server-xml.in
Diffstat (limited to 'src/conf_mode/system_ipv6.py')
-rwxr-xr-xsrc/conf_mode/system_ipv6.py120
1 files changed, 120 insertions, 0 deletions
diff --git a/src/conf_mode/system_ipv6.py b/src/conf_mode/system_ipv6.py
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+++ b/src/conf_mode/system_ipv6.py
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+#!/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)