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-rwxr-xr-xsrc/conf_mode/conntrack_sync.py116
1 files changed, 116 insertions, 0 deletions
diff --git a/src/conf_mode/conntrack_sync.py b/src/conf_mode/conntrack_sync.py
new file mode 100755
index 000000000..e0a414745
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+++ b/src/conf_mode/conntrack_sync.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2021 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_interface_exists
+from vyos.util import call
+from vyos.util import dict_search
+from vyos.util import read_file
+from vyos.template import render
+from vyos.template import get_ipv4
+from vyos.validate import is_addr_assigned
+from vyos.xml import defaults
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+config_file = '/run/conntrackd/conntrackd.conf'
+
+def get_config(config=None):
+ if config:
+ conf = config
+ else:
+ conf = Config()
+ base = ['service', 'conntrack-sync']
+ if not conf.exists(base):
+ return None
+
+ conntrack = conf.get_config_dict(base, key_mangling=('-', '_'),
+ get_first_key=True)
+ # We have gathered the dict representation of the CLI, but there are default
+ # options which we need to update into the dictionary retrived.
+ default_values = defaults(base)
+ conntrack = dict_merge(default_values, conntrack)
+
+ conntrack['hash_size'] = read_file('/sys/module/nf_conntrack/parameters/hashsize')
+ conntrack['table_size'] = read_file('/proc/sys/net/netfilter/nf_conntrack_max')
+
+ conntrack['vrrp'] = conf.get_config_dict(['high-availability', 'vrrp', 'sync-group'],
+ get_first_key=True)
+
+ return conntrack
+
+def verify(conntrack):
+ if not conntrack:
+ return None
+
+ if 'interface' not in conntrack:
+ raise ConfigError('Interface not defined!')
+
+ for interface in conntrack['interface']:
+ verify_interface_exists(interface)
+ # Interface must not only exist, it must also carry an IP address
+ if len(get_ipv4(interface)) < 1:
+ raise ConfigError(f'Interface {interface} requires an IP address!')
+
+ if 'expect_sync' in conntrack:
+ if len(conntrack['expect_sync']) > 1 and 'all' in conntrack['expect_sync']:
+ raise ConfigError('Cannot configure all with other protocol')
+
+ if 'listen_address' in conntrack:
+ address = conntrack['listen_address']
+ if not is_addr_assigned(address):
+ raise ConfigError(f'Specified listen-address {address} not assigned to any interface!')
+
+ vrrp_group = dict_search('failover_mechanism.vrrp.sync_group', conntrack)
+ if vrrp_group == None:
+ raise ConfigError(f'No VRRP sync-group defined!')
+ if vrrp_group not in conntrack['vrrp']:
+ raise ConfigError(f'VRRP sync-group {vrrp_group} not configured!')
+
+ return None
+
+def generate(conntrack):
+ if not conntrack:
+ if os.path.isfile(config_file):
+ os.unlink(config_file)
+ return None
+
+ render(config_file, 'conntrackd/conntrackd.conf.tmpl', conntrack)
+
+ return None
+
+def apply(conntrack):
+ if not conntrack:
+ call('systemctl stop conntrackd.service')
+ return None
+
+ call('systemctl restart conntrackd.service')
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)