diff options
| -rw-r--r-- | interface-definitions/system-ip.xml.in | 58 | ||||
| -rwxr-xr-x | src/conf_mode/system-ip.py | 81 |
2 files changed, 139 insertions, 0 deletions
diff --git a/interface-definitions/system-ip.xml.in b/interface-definitions/system-ip.xml.in new file mode 100644 index 000000000..14b3b8a07 --- /dev/null +++ b/interface-definitions/system-ip.xml.in @@ -0,0 +1,58 @@ +<?xml version="1.0"?> +<interfaceDefinition> + <node name="system"> + <children> + <node name="ip" owner="${vyos_conf_scripts_dir}/system-ip.py"> + <properties> + <help>IPv4 Settings</help> + <priority>400</priority> + </properties> + <children> + <node name="arp"> + <properties> + <help>Parameters for ARP cache</help> + </properties> + <children> + <leafNode name="table-size"> + <properties> + <help>Maximum number of entries to keep in the ARP cache</help> + <completionHelp> + <list>1024 2048 4096 8192 16384 32768</list> + </completionHelp> + <constraint> + <regex>(1024|2048|4096|8192|16384|32768)</regex> + </constraint> + </properties> + </leafNode> + </children> + </node> + <leafNode name="disable-forwarding"> + <properties> + <help>Disable IPv4 forwarding on all interfaces</help> + <valueless/> + </properties> + </leafNode> + <node name="multipath"> + <properties> + <help>IPv4 multipath settings</help> + </properties> + <children> + <leafNode name="ignore-unreachable-nexthops"> + <properties> + <help>Ignore next hops that are not in the ARP table</help> + <valueless/> + </properties> + </leafNode> + <leafNode name="layer4-hashing"> + <properties> + <help>Use layer 4 information for ECMP hashing</help> + <valueless/> + </properties> + </leafNode> + </children> + </node> + </children> + </node> + </children> + </node> +</interfaceDefinition> diff --git a/src/conf_mode/system-ip.py b/src/conf_mode/system-ip.py new file mode 100755 index 000000000..335507411 --- /dev/null +++ b/src/conf_mode/system-ip.py @@ -0,0 +1,81 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2019 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 copy import deepcopy +from vyos.config import Config +from vyos import ConfigError + +default_config_data = { + 'arp_table': 8192, + 'ipv4_forward': '1', + 'mp_unreach_nexthop': '0', + 'mp_layer4_hashing': '0' +} + +def sysctl(name, value): + os.system('sysctl -wq {}={}'.format(name, value)) + +def get_config(): + ip_opt = deepcopy(default_config_data) + conf = Config() + conf.set_level('system ip') + if conf.exists(''): + if conf.exists('arp table-size'): + ip_opt['arp_table'] = int(conf.return_value('arp table-size')) + + if conf.exists('disable-forwarding'): + ip_opt['ipv4_forward'] = '0' + + if conf.exists('multipath ignore-unreachable-nexthops'): + ip_opt['mp_unreach_nexthop'] = '1' + + if conf.exists('multipath layer4-hashing'): + ip_opt['mp_layer4_hashing'] = '1' + + return ip_opt + +def verify(ip_opt): + pass + +def generate(ip_opt): + pass + +def apply(ip_opt): + # apply ARP threshold values + sysctl('net.ipv4.neigh.default.gc_thresh3', ip_opt['arp_table']) + sysctl('net.ipv4.neigh.default.gc_thresh2', ip_opt['arp_table'] // 2) + sysctl('net.ipv4.neigh.default.gc_thresh1', ip_opt['arp_table'] // 8) + + # enable/disable IPv4 forwarding + with open('/proc/sys/net/ipv4/conf/all/forwarding', 'w') as f: + f.write(ip_opt['ipv4_forward']) + + # configure multipath + sysctl('net.ipv4.fib_multipath_use_neigh', ip_opt['mp_unreach_nexthop']) + sysctl('net.ipv4.fib_multipath_hash_policy', ip_opt['mp_layer4_hashing']) + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) |