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#!/usr/bin/env python3
#
# Copyright (C) 2019-2023 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 get_accel_dict
from vyos.template import render
from vyos.utils.process import call
from vyos.utils.dict import dict_search
from vyos.accel_ppp_util import verify_accel_ppp_base_service
from vyos.accel_ppp_util import verify_accel_ppp_ip_pool
from vyos.accel_ppp_util import get_pools_in_order
from vyos.base import Warning
from vyos import ConfigError
from vyos import airbag
airbag.enable()
l2tp_conf = '/run/accel-pppd/l2tp.conf'
l2tp_chap_secrets = '/run/accel-pppd/l2tp.chap-secrets'
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['vpn', 'l2tp', 'remote-access']
if not conf.exists(base):
return None
# retrieve common dictionary keys
l2tp = get_accel_dict(conf, base, l2tp_chap_secrets)
if dict_search('client_ip_pool', l2tp):
# Multiple named pools require ordered values T5099
l2tp['ordered_named_pools'] = get_pools_in_order(
dict_search('client_ip_pool', l2tp))
l2tp['ip6_column'] = []
if dict_search('client_ipv6_pool.prefix', l2tp):
l2tp['ip6_column'].append('ipv6')
if dict_search('client_ipv6_pool.delegate', l2tp):
l2tp['ip6_column'].append('ip6-db')
l2tp['server_type'] = 'l2tp'
return l2tp
def verify(l2tp):
if not l2tp:
return None
verify_accel_ppp_base_service(l2tp)
if dict_search('authentication.radius.dynamic_author.server', l2tp):
if not dict_search('authentication.radius.dynamic_author.key', l2tp):
raise ConfigError('DA/CoE server key required!')
if dict_search('authentication.mode', l2tp) in ['local', 'noauth']:
if not dict_search('client_ip_pool', l2tp) and not dict_search('client_ipv6_pool', l2tp):
raise ConfigError(
"L2TP local auth mode requires local client-ip-pool or client-ipv6-pool to be configured!")
if dict_search('client_ip_pool', l2tp) and not dict_search('default_pool', l2tp):
Warning("'default-pool' is not defined")
verify_accel_ppp_ip_pool(l2tp)
if 'wins_server' in l2tp and len(l2tp['wins_server']) > 2:
raise ConfigError(
'Not more then two WINS name-servers can be configured')
return None
def generate(l2tp):
if not l2tp:
return None
render(l2tp_conf, 'accel-ppp/l2tp.config.j2', l2tp)
if dict_search('authentication.mode', l2tp) == 'local':
render(l2tp_chap_secrets, 'accel-ppp/chap-secrets.config_dict.j2',
l2tp, permission=0o640)
return None
def apply(l2tp):
if not l2tp:
call('systemctl stop accel-ppp@l2tp.service')
for file in [l2tp_chap_secrets, l2tp_conf]:
if os.path.exists(file):
os.unlink(file)
return None
call('systemctl restart accel-ppp@l2tp.service')
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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