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#!/usr/bin/env python3
#
# Copyright (C) 2018-2020 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
import re
from copy import deepcopy
from socket import socket, AF_INET, SOCK_STREAM
from sys import exit
from time import sleep
from vyos.config import Config
from vyos import ConfigError
from vyos.util import call, get_half_cpus
from vyos.template import render
pptp_conf = '/run/accel-pppd/pptp.conf'
pptp_chap_secrets = '/run/accel-pppd/pptp.chap-secrets'
default_pptp = {
'authentication': {
'mode': 'local',
'local-users': {
},
'radiussrv': {},
'auth_proto': 'auth_mschap_v2',
'mppe': 'require'
},
'chap_secrets_file': pptp_chap_secrets, # used in Jinja2 template
'outside_addr': '',
'dns': [],
'wins': [],
'client_ip_pool': '',
'mtu': '1436',
'thread_cnt': get_half_cpus()
}
def get_config():
c = Config()
if not c.exists(['vpn', 'pptp', 'remote-access']):
return None
c.set_level(['vpn', 'pptp', 'remote-access'])
pptp = deepcopy(default_pptp)
### general options ###
if c.exists(['dns-servers', 'server-1']):
pptp['dns'].append(c.return_value(['dns-servers', 'server-1']))
if c.exists(['dns-servers', 'server-2']):
pptp['dns'].append(c.return_value(['dns-servers', 'server-2']))
if c.exists(['wins-servers', 'server-1']):
pptp['wins'].append(
c.return_value(['wins-servers', 'server-1']))
if c.exists(['wins-servers', 'server-2']):
pptp['wins'].append(
c.return_value(['wins-servers', 'server-2']))
if c.exists(['outside-address']):
pptp['outside_addr'] = c.return_value(['outside-address'])
# auth local
if c.exists(['authentication', 'mode', 'local']):
if c.exists(['authentication', 'local-users', 'username']):
for usr in c.list_nodes(['authentication', 'local-users', 'username']):
pptp['authentication']['local-users'].update(
{
usr: {
'passwd': '',
'state': 'enabled',
'ip': ''
}
}
)
if c.exists(['authentication', 'local-users', 'username', usr, 'password']):
pptp['authentication']['local-users'][usr]['passwd'] = c.return_value(
['authentication', 'local-users', 'username', usr, 'password'])
if c.exists(['authentication', 'local-users', 'username', usr, 'disable']):
pptp['authentication']['local-users'][usr]['state'] = 'disable'
if c.exists(['authentication', 'local-users', 'username', usr, 'static-ip']):
pptp['authentication']['local-users'][usr]['ip'] = c.return_value(
['authentication', 'local-users', 'username', usr, 'static-ip'])
# authentication mode radius servers and settings
if c.exists(['authentication', 'mode', 'radius']):
pptp['authentication']['mode'] = 'radius'
rsrvs = c.list_nodes(['authentication', 'radius', 'server'])
for rsrv in rsrvs:
if not c.return_value(['authentication', 'radius', 'server', rsrv, 'fail-time']):
ftime = '0'
else:
ftime = c.return_value(
['authentication', 'radius', 'server', rsrv, 'fail-time'])
if not c.return_value(['authentication', 'radius-server', rsrv, 'req-limit']):
reql = '0'
else:
reql = c.return_value(
['authentication', 'radius', 'server', rsrv, 'req-limit'])
pptp['authentication']['radiussrv'].update(
{
rsrv: {
'secret': c.return_value(['authentication', 'radius', 'server', rsrv, 'key']),
'fail-time': ftime,
'req-limit': reql
}
}
)
if c.exists(['client-ip-pool']):
if c.exists(['client-ip-pool', 'start']):
pptp['client_ip_pool'] = c.return_value(
['client-ip-pool', 'start'])
if c.exists(['client-ip-pool', 'stop']):
pptp['client_ip_pool'] += '-' + \
re.search(
'[0-9]+$', c.return_value(['client-ip-pool', 'stop'])).group(0)
if c.exists(['mtu']):
pptp['mtu'] = c.return_value(['mtu'])
# gateway address
if c.exists(['gateway-address']):
pptp['gw_ip'] = c.return_value(['gateway-address'])
else:
pptp['gw_ip'] = re.sub(
'[0-9]+$', '1', pptp['client_ip_pool'])
if c.exists(['authentication', 'require']):
if c.return_value(['authentication', 'require']) == 'pap':
pptp['authentication']['auth_proto'] = 'auth_pap'
if c.return_value(['authentication', 'require']) == 'chap':
pptp['authentication']['auth_proto'] = 'auth_chap_md5'
if c.return_value(['authentication', 'require']) == 'mschap':
pptp['authentication']['auth_proto'] = 'auth_mschap_v1'
if c.return_value(['authentication', 'require']) == 'mschap-v2':
pptp['authentication']['auth_proto'] = 'auth_mschap_v2'
if c.exists(['authentication', 'mppe']):
pptp['authentication']['mppe'] = c.return_value(
['authentication', 'mppe'])
return pptp
def verify(pptp):
if not pptp:
return None
if pptp['authentication']['mode'] == 'local':
if not pptp['authentication']['local-users']:
raise ConfigError(
'pptp-server authentication local-users required')
for usr in pptp['authentication']['local-users']:
if not pptp['authentication']['local-users'][usr]['passwd']:
raise ConfigError('user ' + usr + ' requires a password')
if pptp['authentication']['mode'] == 'radius':
if len(pptp['authentication']['radiussrv']) == 0:
raise ConfigError('radius server required')
for rsrv in pptp['authentication']['radiussrv']:
if pptp['authentication']['radiussrv'][rsrv]['secret'] == None:
raise ConfigError('radius server ' + rsrv +
' needs a secret configured')
def generate(pptp):
if not pptp:
return None
dirname = os.path.dirname(pptp_conf)
if not os.path.exists(dirname):
os.mkdir(dirname)
render(pptp_conf, 'pptp/pptp.config.tmpl', pptp, trim_blocks=True)
if pptp['authentication']['local-users']:
old_umask = os.umask(0o077)
render(pptp_chap_secrets, 'pptp/chap-secrets.tmpl', pptp, trim_blocks=True)
os.umask(old_umask)
def apply(pptp):
if not pptp:
call('systemctl stop accel-ppp@pptp.service')
for file in [pptp_conf, pptp_chap_secrets]:
if os.path.exists(file):
os.unlink(file)
return None
call('systemctl restart accel-ppp@pptp.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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