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service_pppoe-server.py
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service_pppoe-server.py
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#!/usr/bin/env python3
#
# Copyright (C) 2018-2024 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.configdict import is_node_changed
from vyos.configverify import verify_interface_exists
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_name_servers
from vyos.accel_ppp_util import verify_accel_ppp_wins_servers
from vyos.accel_ppp_util import verify_accel_ppp_authentication
from vyos.accel_ppp_util import verify_accel_ppp_ip_pool
from vyos.accel_ppp_util import get_pools_in_order
from vyos import ConfigError
from vyos import airbag
airbag.enable()
pppoe_conf = r'/run/accel-pppd/pppoe.conf'
pppoe_chap_secrets = r'/run/accel-pppd/pppoe.chap-secrets'
def convert_pado_delay(pado_delay):
new_pado_delay = {'delays_without_sessions': [],
'delays_with_sessions': []}
for delay, sessions in pado_delay.items():
if not sessions:
new_pado_delay['delays_without_sessions'].append(delay)
else:
new_pado_delay['delays_with_sessions'].append((delay, int(sessions['sessions'])))
return new_pado_delay
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['service', 'pppoe-server']
if not conf.exists(base):
return None
# retrieve common dictionary keys
pppoe = get_accel_dict(conf, base, pppoe_chap_secrets)
if dict_search('client_ip_pool', pppoe):
# Multiple named pools require ordered values T5099
pppoe['ordered_named_pools'] = get_pools_in_order(dict_search('client_ip_pool', pppoe))
if dict_search('pado_delay', pppoe):
pado_delay = dict_search('pado_delay', pppoe)
pppoe['pado_delay'] = convert_pado_delay(pado_delay)
# reload-or-restart does not implemented in accel-ppp
# use this workaround until it will be implemented
# https://phabricator.accel-ppp.org/T3
conditions = [is_node_changed(conf, base + ['client-ip-pool']),
is_node_changed(conf, base + ['client-ipv6-pool']),
is_node_changed(conf, base + ['interface'])]
if any(conditions):
pppoe.update({'restart_required': {}})
pppoe['server_type'] = 'pppoe'
return pppoe
def verify_pado_delay(pppoe):
if 'pado_delay' in pppoe:
pado_delay = pppoe['pado_delay']
delays_without_sessions = pado_delay['delays_without_sessions']
if 'disable' in delays_without_sessions:
raise ConfigError(
'Number of sessions must be specified for "pado-delay disable"'
)
if len(delays_without_sessions) > 1:
raise ConfigError(
f'Cannot add more then ONE pado-delay without sessions, '
f'but {len(delays_without_sessions)} were set'
)
if 'disable' in [delay[0] for delay in pado_delay['delays_with_sessions']]:
# need to sort delays by sessions to verify if there is no delay
# for sessions after disabling
sorted_pado_delay = sorted(pado_delay['delays_with_sessions'], key=lambda k_v: k_v[1])
last_delay = sorted_pado_delay[-1]
if last_delay[0] != 'disable':
raise ConfigError(
f'Cannot add pado-delay after disabled sessions, but '
f'"pado-delay {last_delay[0]} sessions {last_delay[1]}" was set'
)
def verify(pppoe):
if not pppoe:
return None
verify_accel_ppp_authentication(pppoe)
verify_accel_ppp_ip_pool(pppoe)
verify_accel_ppp_name_servers(pppoe)
verify_accel_ppp_wins_servers(pppoe)
verify_pado_delay(pppoe)
if 'interface' not in pppoe:
raise ConfigError('At least one listen interface must be defined!')
# Check is interface exists in the system
for interface in pppoe['interface']:
verify_interface_exists(pppoe, interface, warning_only=True)
return None
def generate(pppoe):
if not pppoe:
return None
render(pppoe_conf, 'accel-ppp/pppoe.config.j2', pppoe)
if dict_search('authentication.mode', pppoe) == 'local':
render(pppoe_chap_secrets, 'accel-ppp/chap-secrets.config_dict.j2',
pppoe, permission=0o640)
return None
def apply(pppoe):
systemd_service = 'accel-ppp@pppoe.service'
if not pppoe:
call(f'systemctl stop {systemd_service}')
for file in [pppoe_conf, pppoe_chap_secrets]:
if os.path.exists(file):
os.unlink(file)
return None
if 'restart_required' in pppoe:
call(f'systemctl restart {systemd_service}')
else:
call(f'systemctl reload-or-restart {systemd_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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