From 4ef110fd2c501b718344c72d495ad7e16d2bd465 Mon Sep 17 00:00:00 2001 From: Christian Breunig Date: Sat, 30 Dec 2023 23:25:20 +0100 Subject: 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 --- src/conf_mode/system_ip.py | 143 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100755 src/conf_mode/system_ip.py (limited to 'src/conf_mode/system_ip.py') diff --git a/src/conf_mode/system_ip.py b/src/conf_mode/system_ip.py new file mode 100755 index 000000000..7612e2c0d --- /dev/null +++ b/src/conf_mode/system_ip.py @@ -0,0 +1,143 @@ +#!/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 . + +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 call +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', 'ip'] + + 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'] = 'ip' + + # 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): + # Apply ARP threshold values + # table_size has a default value - thus the key always exists + size = int(dict_search('arp.table_size', opt)) + # Amount upon reaching which the records begin to be cleared immediately + sysctl_write('net.ipv4.neigh.default.gc_thresh3', size) + # Amount after which the records begin to be cleaned after 5 seconds + sysctl_write('net.ipv4.neigh.default.gc_thresh2', size // 2) + # Minimum number of stored records is indicated which is not cleared + sysctl_write('net.ipv4.neigh.default.gc_thresh1', size // 8) + + # enable/disable IPv4 forwarding + tmp = dict_search('disable_forwarding', opt) + value = '0' if (tmp != None) else '1' + write_file('/proc/sys/net/ipv4/conf/all/forwarding', value) + + # enable/disable IPv4 directed broadcast forwarding + tmp = dict_search('disable_directed_broadcast', opt) + value = '0' if (tmp != None) else '1' + write_file('/proc/sys/net/ipv4/conf/all/bc_forwarding', value) + + # configure multipath + tmp = dict_search('multipath.ignore_unreachable_nexthops', opt) + value = '1' if (tmp != None) else '0' + sysctl_write('net.ipv4.fib_multipath_use_neigh', value) + + tmp = dict_search('multipath.layer4_hashing', opt) + value = '1' if (tmp != None) else '0' + sysctl_write('net.ipv4.fib_multipath_hash_policy', value) + + # configure TCP options (defaults as of Linux 6.4) + tmp = dict_search('tcp.mss.probing', opt) + if tmp is None: + value = 0 + elif tmp == 'on-icmp-black-hole': + value = 1 + elif tmp == 'force': + value = 2 + else: + # Shouldn't happen + raise ValueError("TCP MSS probing is neither 'on-icmp-black-hole' nor 'force'!") + sysctl_write('net.ipv4.tcp_mtu_probing', value) + + tmp = dict_search('tcp.mss.base', opt) + value = '1024' if (tmp is None) else tmp + sysctl_write('net.ipv4.tcp_base_mss', value) + + tmp = dict_search('tcp.mss.floor', opt) + value = '48' if (tmp is None) else tmp + sysctl_write('net.ipv4.tcp_mtu_probe_floor', 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'ip 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) -- cgit v1.2.3