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authorChristian Poessinger <christian@poessinger.com>2020-11-20 16:53:52 +0100
committerGitHub <noreply@github.com>2020-11-20 16:53:52 +0100
commit8bc6775a692e07b085a1a8e51edbf25f0c1f735c (patch)
tree0336f23a28bbcee6a28a9e1d83d7d4bc771e7207 /src/conf_mode/policy-local-route.py
parent7fce006670bf359459020798aed7f6b4dd6d5f6b (diff)
parent7606fa6081e2f6d76982056ca93003e6c5dbd685 (diff)
downloadvyos-1x-8bc6775a692e07b085a1a8e51edbf25f0c1f735c.tar.gz
vyos-1x-8bc6775a692e07b085a1a8e51edbf25f0c1f735c.zip
Merge pull request #614 from sever-sever/T439
policy-conf: T439: Add policy local-route PBR
Diffstat (limited to 'src/conf_mode/policy-local-route.py')
-rwxr-xr-xsrc/conf_mode/policy-local-route.py110
1 files changed, 110 insertions, 0 deletions
diff --git a/src/conf_mode/policy-local-route.py b/src/conf_mode/policy-local-route.py
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+++ b/src/conf_mode/policy-local-route.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 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.configdict import node_changed
+from vyos.configdict import leaf_node_changed
+from vyos.template import render
+from vyos.util import call
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+
+def get_config(config=None):
+
+ if config:
+ conf = config
+ else:
+ conf = Config()
+ base = ['policy', 'local-route']
+ pbr = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
+
+ # delete policy local-route
+ dict = {}
+ tmp = node_changed(conf, ['policy', 'local-route', 'rule'])
+ if tmp:
+ for rule in (tmp or []):
+ src = leaf_node_changed(conf, ['policy', 'local-route', 'rule', rule, 'source'])
+ if src:
+ dict = dict_merge({'rule_remove' : {rule : {'source' : src}}}, dict)
+ pbr.update(dict)
+
+ # delete policy local-route rule x source x.x.x.x
+ if 'rule' in pbr:
+ for rule in pbr['rule']:
+ src = leaf_node_changed(conf, ['policy', 'local-route', 'rule', rule, 'source'])
+ if src:
+ dict = dict_merge({'rule_remove' : {rule : {'source' : src}}}, dict)
+ pbr.update(dict)
+
+ return pbr
+
+def verify(pbr):
+ # bail out early - looks like removal from running config
+ if not pbr:
+ return None
+
+ if 'rule' in pbr:
+ for rule in pbr['rule']:
+ if 'source' not in pbr['rule'][rule]:
+ raise ConfigError('Source address required!')
+ else:
+ if 'set' not in pbr['rule'][rule] or 'table' not in pbr['rule'][rule]['set']:
+ raise ConfigError('Table set is required!')
+
+ return None
+
+def generate(pbr):
+ if not pbr:
+ return None
+
+ return None
+
+def apply(pbr):
+ if not pbr:
+ return None
+
+ # Delete old rule if needed
+ if 'rule_remove' in pbr:
+ for rule in pbr['rule_remove']:
+ for src in pbr['rule_remove'][rule]['source']:
+ call(f'ip rule del prio {rule} from {src}')
+
+ # Generate new config
+ if 'rule' in pbr:
+ for rule in pbr['rule']:
+ table = pbr['rule'][rule]['set']['table']
+ if pbr['rule'][rule]['source']:
+ for src in pbr['rule'][rule]['source']:
+ call(f'ip rule add prio {rule} from {src} lookup {table}')
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)