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-rwxr-xr-xsrc/conf_mode/system-ip.py81
1 files changed, 81 insertions, 0 deletions
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)