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#!/usr/bin/env python3
#
# Copyright (C) 2020-2021 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.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'], key_mangling=('-', '_'))
if tmp:
for rule in (tmp or []):
src = leaf_node_changed(conf, ['policy', 'local-route', 'rule', rule, 'source'])
fwmk = leaf_node_changed(conf, ['policy', 'local-route', 'rule', rule, 'fwmark'])
if src:
dict = dict_merge({'rule_remove' : {rule : {'source' : src}}}, dict)
pbr.update(dict)
if fwmk:
dict = dict_merge({'rule_remove' : {rule : {'fwmark' : fwmk}}}, dict)
pbr.update(dict)
# delete policy local-route rule x source x.x.x.x
# delete policy local-route rule x fwmark x
if 'rule' in pbr:
for rule in pbr['rule']:
src = leaf_node_changed(conf, ['policy', 'local-route', 'rule', rule, 'source'])
fwmk = leaf_node_changed(conf, ['policy', 'local-route', 'rule', rule, 'fwmark'])
if src:
dict = dict_merge({'rule_remove' : {rule : {'source' : src}}}, dict)
pbr.update(dict)
if fwmk:
dict = dict_merge({'rule_remove' : {rule : {'fwmark' : fwmk}}}, 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] and 'fwmark' not in pbr['rule'][rule]:
raise ConfigError('Source address or fwmark is 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']:
if 'source' in pbr['rule_remove'][rule]:
for src in pbr['rule_remove'][rule]['source']:
call(f'ip rule del prio {rule} from {src}')
if 'fwmark' in pbr['rule_remove'][rule]:
for fwmk in pbr['rule_remove'][rule]['fwmark']:
call(f'ip rule del prio {rule} from all fwmark {fwmk}')
# Generate new config
if 'rule' in pbr:
for rule in pbr['rule']:
table = pbr['rule'][rule]['set']['table']
# Only source in the rule
# set policy local-route rule 100 source '203.0.113.1'
if 'source' in pbr['rule'][rule] and not 'fwmark' in pbr['rule'][rule]:
for src in pbr['rule'][rule]['source']:
call(f'ip rule add prio {rule} from {src} lookup {table}')
# Only fwmark in the rule
# set policy local-route rule 101 fwmark '23'
if 'fwmark' in pbr['rule'][rule] and not 'source' in pbr['rule'][rule]:
for fwmk in pbr['rule'][rule]['fwmark']:
call(f'ip rule add prio {rule} from all fwmark {fwmk} lookup {table}')
# Source and fwmark in the rule
# set policy local-route rule 100 source '203.0.113.1'
# set policy local-route rule 100 fwmark '23'
if 'source' in pbr['rule'][rule] and 'fwmark' in pbr['rule'][rule]:
for src in pbr['rule'][rule]['source']:
for fwmk in pbr['rule'][rule]['fwmark']:
call(f'ip rule add prio {rule} from {src} fwmark {fwmk} 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)
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