service-pppoe: T1878: option pppoe single-session implementation

  - renamed files to fit the schemas in the directories

1 files changed, 628 insertions, 0 deletions

diff --git a/src/conf_mode/service-pppoe.py b/src/conf_mode/service-pppoe.py
new file mode 100755
index 000000000..6aec9be98
--- /dev/null
+++ b/src/conf_mode/service-pppoe.py
@@ -0,0 +1,628 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018 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 sys
+import os
+import re
+import subprocess
+import jinja2
+import socket
+import time
+import syslog as sl
+
+from vyos.config import Config
+from vyos import ConfigError
+
+pidfile = r'/var/run/accel_pppoe.pid'
+pppoe_cnf_dir = r'/etc/accel-ppp/pppoe'
+chap_secrets = pppoe_cnf_dir + '/chap-secrets'
+pppoe_conf = pppoe_cnf_dir + '/pppoe.config'
+# accel-pppd -d -c /etc/accel-ppp/pppoe/pppoe.config -p /var/run/accel_pppoe.pid
+
+### config path creation
+if not os.path.exists(pppoe_cnf_dir):
+  os.makedirs(pppoe_cnf_dir)
+  sl.syslog(sl.LOG_NOTICE, pppoe_cnf_dir  + " created")
+
+pppoe_config = '''
+### generated by accel_pppoe.py ### 
+[modules]
+log_syslog
+pppoe
+{% if authentication['mode'] == 'radius' %}
+radius
+{% endif %}
+ippool
+{% if client_ipv6_pool %}
+ipv6pool
+ipv6_nd
+ipv6_dhcp
+{% endif %}
+chap-secrets
+auth_pap
+auth_chap_md5
+auth_mschap_v1
+auth_mschap_v2
+#pppd_compat
+shaper
+{% if snmp == 'enable' or snmp == 'enable-ma' %}
+net-snmp
+{% endif %}
+{% if limits %}
+connlimit
+{% endif %}
+
+[core]
+thread-count={{thread_cnt}}
+
+[log]
+syslog=accel-pppoe,daemon
+copy=1
+level=5
+
+{% if snmp == 'enable-ma' %}
+[snmp]
+master=1
+{% endif -%}
+
+[client-ip-range]
+disable
+
+{% if ppp_gw %}
+[ip-pool]
+gw-ip-address={{ppp_gw}}
+{% if client_ip_pool %}
+{{client_ip_pool}}
+{% endif -%}
+
+{% if client_ip_subnets %}
+{% for sn in client_ip_subnets %}
+{{sn}}
+{% endfor %}
+{% endif %}
+{% endif -%}
+
+{% if client_ipv6_pool %}
+[ipv6-pool]
+{% for prfx in client_ipv6_pool['prefix']: %}
+{{prfx}}
+{% endfor %}
+{% for prfx in client_ipv6_pool['delegate-prefix']: %}
+delegate={{prfx}}
+{% endfor %}
+{% endif %}
+
+{% if dns %}
+[dns]
+{% if dns[0] %}
+dns1={{dns[0]}}
+{% endif -%}
+{% if dns[1] %}
+dns2={{dns[1]}}
+{% endif -%}
+{% endif %}
+
+{% if dnsv6 %}
+[ipv6-dns]
+{% for srv in dnsv6: %}
+{{srv}}
+{% endfor %}
+{% endif %}
+
+{% if wins %}
+[wins]
+{% if wins[0] %}
+wins1={{wins[0]}}
+{% endif %}
+{% if wins[1] %}
+wins2={{wins[1]}}
+{% endif -%}
+{% endif -%}
+
+{% if authentication['mode'] == 'local' %}
+[chap-secrets]
+chap-secrets=/etc/accel-ppp/pppoe/chap-secrets
+{% endif -%}
+
+{% if authentication['mode'] == 'radius' %}
+[radius]
+{% for rsrv in authentication['radiussrv']: %}
+server={{rsrv}},{{authentication['radiussrv'][rsrv]['secret']}},\
+req-limit={{authentication['radiussrv'][rsrv]['req-limit']}},\
+fail-time={{authentication['radiussrv'][rsrv]['fail-time']}}
+{% endfor %}
+{% if authentication['radiusopt']['timeout'] %}
+timeout={{authentication['radiusopt']['timeout']}}
+{% endif %}
+{% if authentication['radiusopt']['acct-timeout'] %}
+acct-timeout={{authentication['radiusopt']['acct-timeout']}}
+{% endif %}
+{% if authentication['radiusopt']['max-try'] %}
+max-try={{authentication['radiusopt']['max-try']}}
+{% endif %}
+{% if authentication['radiusopt']['nas-id'] %}
+nas-identifier={{authentication['radiusopt']['nas-id']}}
+{% endif %}
+{% if authentication['radiusopt']['nas-ip'] %}
+nas-ip-address={{authentication['radiusopt']['nas-ip']}}
+{% endif -%}
+{% if authentication['radiusopt']['dae-srv'] %}
+dae-server={{authentication['radiusopt']['dae-srv']['ip-addr']}}:\
+{{authentication['radiusopt']['dae-srv']['port']}},\
+{{authentication['radiusopt']['dae-srv']['secret']}}
+{% endif -%}
+gw-ip-address={{ppp_gw}}
+verbose=1
+
+{% if authentication['radiusopt']['shaper'] %}
+[shaper]
+verbose=1
+attr={{authentication['radiusopt']['shaper']['attr']}}
+{% if authentication['radiusopt']['shaper']['vendor'] %}
+vendor={{authentication['radiusopt']['shaper']['vendor']}}
+{% endif -%}
+{% endif -%}
+{% endif %}
+
+[ppp]
+verbose=1
+check-ip=1
+single-session=replace
+{% if ppp_options['ccp'] %}
+ccp=1
+{% endif %}
+{% if ppp_options['min-mtu'] %}
+min-mtu={{ppp_options['min-mtu']}}
+{% else %}
+min-mtu={{mtu}}
+{% endif %}
+{% if ppp_options['mru'] %}
+mru={{ppp_options['mru']}}
+{% endif %}
+{% if ppp_options['mppe'] %}
+mppe={{ppp_options['mppe']}}
+{% else %}
+mppe=prefer
+{% endif %}
+{% if ppp_options['lcp-echo-interval'] %}
+lcp-echo-interval={{ppp_options['lcp-echo-interval']}}
+{% else %}
+lcp-echo-interval=30
+{% endif %}
+{% if ppp_options['lcp-echo-timeout'] %}
+lcp-echo-timeout={{ppp_options['lcp-echo-timeout']}}
+{% endif %}
+{% if ppp_options['lcp-echo-failure'] %}
+lcp-echo-failure={{ppp_options['lcp-echo-failure']}}
+{% else %}
+lcp-echo-failure=3
+{% endif %}
+{% if ppp_options['ipv4'] %}
+ipv4={{ppp_options['ipv4']}}
+{% endif %}
+{% if client_ipv6_pool %}
+ipv6=allow
+{% endif %}
+
+{% if ppp_options['ipv6'] %}
+ipv6={{ppp_options['ipv6']}}
+{% if ppp_options['ipv6-intf-id'] %}
+ipv6-intf-id={{ppp_options['ipv6-intf-id']}}
+{% endif %}
+{% if ppp_options['ipv6-peer-intf-id'] %}
+ipv6-peer-intf-id={{ppp_options['ipv6-peer-intf-id']}}
+{% endif %}
+{% if ppp_options['ipv6-accept-peer-intf-id'] %}
+ipv6-accept-peer-intf-id={{ppp_options['ipv6-accept-peer-intf-id']}}
+{% endif %}
+{% endif %}
+
+mtu={{mtu}}
+
+[pppoe]
+verbose=1
+{% if concentrator %}
+ac-name={{concentrator}}
+{% endif %}
+{% if interface %}
+{% for int in interface %}
+interface={{int}}
+{% if interface[int]['vlans'] %}
+vlan_mon={{interface[int]['vlans']|join(',')}}
+interface=re:{{int}}\.(409[0-6]|40[0-8][0-9]|[1-3][0-9]{3}|[1-9][0-9]{0,2})
+{% endif %}
+{% endfor -%}
+{% endif -%}
+{% if svc_name %}
+service-name={{svc_name}}
+{% endif -%}
+pado-delay=0
+
+{% if limits %}
+[connlimit]
+limit={{limits['conn-limit']}}
+burst={{limits['burst']}}
+timeout={{limits['timeout']}}
+{% endif %}
+
+[cli]
+tcp=127.0.0.1:2001
+'''
+
+### pppoe chap secrets
+chap_secrets_conf = '''
+# username  server  password  acceptable local IP addresses   shaper
+{% for user in authentication['local-users'] %}
+{% if authentication['local-users'][user]['state'] == 'enabled' %}
+{% if (authentication['local-users'][user]['upload']) and (authentication['local-users'][user]['download']) %}
+{{user}}\t*\t{{authentication['local-users'][user]['passwd']}}\t{{authentication['local-users'][user]['ip']}}\t\
+{{authentication['local-users'][user]['download']}}/{{authentication['local-users'][user]['upload']}}
+{% else %}
+{{user}}\t*\t{{authentication['local-users'][user]['passwd']}}\t{{authentication['local-users'][user]['ip']}}
+{% endif %}
+{% endif %}
+{% endfor %}
+'''
+###
+# inline helper functions
+###
+# depending on hw and threads, daemon needs a little to start
+# if it takes longer than 100 * 0.5 secs, exception is being raised
+# not sure if that's the best way to check it, but it worked so far quite well 
+###
+def chk_con():
+  cnt = 0
+  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+  while True:
+    try:
+      s.connect(("127.0.0.1", 2001))
+      break
+    except ConnectionRefusedError:
+      time.sleep(0.5)
+      cnt +=1
+      if cnt == 100:
+        raise("failed to start pppoe server")
+        break
+
+### chap_secrets file if auth mode local
+def write_chap_secrets(c):
+  tmpl = jinja2.Template(chap_secrets_conf, trim_blocks=True)
+  chap_secrets_txt = tmpl.render(c)
+  old_umask = os.umask(0o077)
+  open(chap_secrets,'w').write(chap_secrets_txt)
+  os.umask(old_umask)
+  sl.syslog(sl.LOG_NOTICE, chap_secrets + ' written')
+
+def accel_cmd(cmd=''):
+  if not cmd:
+    return None
+  try:
+    ret = subprocess.check_output(['/usr/bin/accel-cmd',cmd]).decode().strip()
+    return ret
+  except:
+    return 1
+
+#### check ig local-ip is in client pool subnet
+
+
+### 
+# inline helper functions end
+###
+
+def get_config():
+  c = Config()
+  if not c.exists('service pppoe-server'):
+    return None
+
+  config_data = {
+    'concentrator'      : 'vyos-ac',
+    'authentication'    : {
+      'local-users'     : {
+      },
+      'mode'            : 'local',
+      'radiussrv'       : {},
+      'radiusopt'       : {}
+    },
+    'client_ip_pool'    : '',
+    'client_ip_subnets' : [],
+    'client_ipv6_pool'  : {},
+    'interface'         : {},
+    'ppp_gw'            : '',
+    'svc_name'          : '',
+    'dns'               : [],
+    'dnsv6'             : [],
+    'wins'              : [],
+    'mtu'               : '1492',
+    'ppp_options'       : {},
+    'limits'            : {},
+    'snmp'              : 'disable'
+  }
+
+  c.set_level('service pppoe-server')
+  ### general options 
+  if c.exists('access-concentrator'):
+    config_data['concentrator'] = c.return_value('access-concentrator')
+  if c.exists('service-name'):
+    config_data['svc_name'] = c.return_value('service-name')
+  if c.exists('interface'):
+    for intfc in c.list_nodes('interface'):
+      config_data['interface'][intfc] = {'vlans' : []}
+      if c.exists('interface ' + intfc + ' vlan-id'):
+        config_data['interface'][intfc]['vlans'] += c.return_values('interface ' + intfc + ' vlan-id')
+      if c.exists('interface ' + intfc + ' vlan-range'):
+        config_data['interface'][intfc]['vlans'] +=c.return_values('interface ' + intfc + ' vlan-range')
+  if c.exists('local-ip'):
+    config_data['ppp_gw'] = c.return_value('local-ip')
+  if c.exists('dns-servers'):
+    if c.return_value('dns-servers server-1'):
+      config_data['dns'].append(c.return_value('dns-servers server-1'))
+    if c.return_value('dns-servers server-2'):
+      config_data['dns'].append(c.return_value('dns-servers server-2'))
+  if c.exists('dnsv6-servers'):
+    if c.return_value('dnsv6-servers server-1'):
+      config_data['dnsv6'].append(c.return_value('dnsv6-servers server-1'))
+    if c.return_value('dnsv6-servers server-2'):
+      config_data['dnsv6'].append(c.return_value('dnsv6-servers server-2'))
+    if c.return_value('dnsv6-servers server-3'):
+      config_data['dnsv6'].append(c.return_value('dnsv6-servers server-3'))
+  if c.exists('wins-servers'):
+    if c.return_value('wins-servers server-1'):
+      config_data['wins'].append(c.return_value('wins-servers server-1'))
+    if c.return_value('wins-servers server-2'):
+      config_data['wins'].append(c.return_value('wins-servers server-2'))
+  if c.exists('client-ip-pool'):
+    if c.exists('client-ip-pool start'):
+      config_data['client_ip_pool'] = c.return_value('client-ip-pool start') 
+      if c.exists('client-ip-pool stop'):
+        config_data['client_ip_pool'] += '-' + re.search('[0-9]+$', c.return_value('client-ip-pool stop')).group(0)
+      else:
+        raise ConfigError('client ip pool stop required')
+    if c.exists('client-ip-pool subnet'):
+      config_data['client_ip_subnets'] = c.return_values('client-ip-pool subnet')
+  if c.exists('client-ipv6-pool prefix'):
+    config_data['client_ipv6_pool']['prefix'] = c.return_values('client-ipv6-pool prefix')
+    if c.exists('client-ipv6-pool delegate-prefix'):
+      config_data['client_ipv6_pool']['delegate-prefix'] = c.return_values('client-ipv6-pool delegate-prefix')
+  if c.exists('limits'):
+    if c.exists('limits burst'):
+      config_data['limits']['burst'] = str(c.return_value('limits burst'))
+    if c.exists('limits timeout'):
+      config_data['limits']['timeout'] = str(c.return_value('limits timeout'))
+    if c.exists('limits connection-limit'):
+      config_data['limits']['conn-limit'] = str(c.return_value('limits connection-limit'))
+  if c.exists('snmp'):
+    config_data['snmp'] = 'enable'
+  if c.exists('snmp master-agent'):
+    config_data['snmp'] = 'enable-ma'
+
+  #### authentication mode local
+  if not c.exists('authentication mode'):
+    raise ConfigError('pppoe-server authentication mode required')
+    
+  if c.exists('authentication mode local'):
+    if c.exists('authentication local-users username'):
+      for usr in c.list_nodes('authentication local-users username'):
+        config_data['authentication']['local-users'].update(
+          {
+            usr : {
+              'passwd'    : None,
+              'state'     : 'enabled',
+              'ip'        : '*',
+              'upload'    : None,
+              'download'  : None
+            }
+          }
+        )
+        if c.exists('authentication local-users username ' + usr + ' password'):
+          config_data['authentication']['local-users'][usr]['passwd'] = c.return_value('authentication local-users username ' + usr + ' password')
+        if c.exists('authentication local-users username ' + usr + ' disable'):
+          config_data['authentication']['local-users'][usr]['state'] = 'disable'
+        if c.exists('authentication local-users username ' + usr + ' static-ip'):
+          config_data['authentication']['local-users'][usr]['ip'] = c.return_value('authentication local-users username ' + usr + ' static-ip')
+        if c.exists('authentication local-users username ' + usr + ' rate-limit download'):
+          config_data['authentication']['local-users'][usr]['download'] = c.return_value('authentication local-users username ' + usr + ' rate-limit download')
+        if c.exists('authentication local-users username ' + usr + ' rate-limit upload'):
+          config_data['authentication']['local-users'][usr]['upload'] = c.return_value('authentication local-users username ' + usr + ' rate-limit upload')
+
+    ### authentication mode radius servers and settings
+
+  if c.exists('authentication mode radius'):
+    config_data['authentication']['mode'] = 'radius'
+    rsrvs = c.list_nodes('authentication radius-server')
+    for rsrv in rsrvs:
+      if c.return_value('authentication radius-server ' + rsrv + ' fail-time') == None:
+        ftime = '0'
+      else:
+        ftime = str(c.return_value('authentication radius-server ' + rsrv + ' fail-time'))
+      if c.return_value('authentication radius-server ' + rsrv + ' req-limit') == None:
+        reql = '0'
+      else:
+        reql = str(c.return_value('authentication radius-server ' + rsrv + ' req-limit'))
+      config_data['authentication']['radiussrv'].update(
+        {
+          rsrv  : {
+            'secret'  : c.return_value('authentication radius-server ' + rsrv + ' secret'),
+            'fail-time' : ftime,
+            'req-limit' : reql 
+            }
+        }
+      )
+
+    #### advanced radius-setting
+    if c.exists('authentication radius-settings'):
+      if c.exists('authentication radius-settings acct-timeout'):
+        config_data['authentication']['radiusopt']['acct-timeout'] = c.return_value('authentication radius-settings acct-timeout')
+      if c.exists('authentication radius-settings max-try'):
+        config_data['authentication']['radiusopt']['max-try'] = c.return_value('authentication radius-settings max-try')
+      if c.exists('authentication radius-settings timeout'):
+        config_data['authentication']['radiusopt']['timeout'] = c.return_value('authentication radius-settings timeout')
+      if c.exists('authentication radius-settings nas-identifier'):
+        config_data['authentication']['radiusopt']['nas-id'] = c.return_value('authentication radius-settings nas-identifier')
+      if c.exists('authentication radius-settings nas-ip-address'):
+        config_data['authentication']['radiusopt']['nas-ip'] = c.return_value('authentication radius-settings nas-ip-address')
+      if c.exists('authentication radius-settings dae-server'):
+        config_data['authentication']['radiusopt'].update(
+          {
+            'dae-srv' : {
+              'ip-addr' : c.return_value('authentication radius-settings dae-server ip-address'),
+              'port'    : c.return_value('authentication radius-settings dae-server port'),
+              'secret'  : str(c.return_value('authentication radius-settings dae-server secret'))
+            }
+          }
+        )
+      #### filter-id is the internal accel default if attribute is empty
+      #### set here as default for visibility which may change in the future
+      if c.exists('authentication radius-settings rate-limit enable'):
+        if not c.exists('authentication radius-settings rate-limit attribute'):
+          config_data['authentication']['radiusopt']['shaper'] = {
+            'attr'  : 'Filter-Id'
+          }
+        else:
+          config_data['authentication']['radiusopt']['shaper'] = {
+          'attr'  : c.return_value('authentication radius-settings rate-limit attribute')
+          }
+        if c.exists('authentication radius-settings rate-limit vendor'):
+          config_data['authentication']['radiusopt']['shaper']['vendor'] = c.return_value('authentication radius-settings rate-limit vendor')
+
+  if c.exists('mtu'):
+    config_data['mtu'] = c.return_value('mtu')
+
+  ### ppp_options
+  ppp_options = {}
+  if c.exists('ppp-options'):
+    if c.exists('ppp-options ccp'):
+      ppp_options['ccp'] = c.return_value('ppp-options ccp')
+    if c.exists('ppp-options min-mtu'):
+      ppp_options['min-mtu'] = c.return_value('ppp-options min-mtu')
+    if c.exists('ppp-options mru'):
+      ppp_options['mru'] = c.return_value('ppp-options mru')
+    if c.exists('ppp-options mppe deny'):
+      ppp_options['mppe'] = 'deny'
+    if c.exists('ppp-options mppe require'):
+      ppp_options['mppe'] = 'requre'
+    if c.exists('ppp-options mppe prefer'):
+      ppp_options['mppe'] = 'prefer'
+    if c.exists('ppp-options lcp-echo-failure'):
+      ppp_options['lcp-echo-failure'] = c.return_value('ppp-options lcp-echo-failure')
+    if c.exists('ppp-options lcp-echo-interval'):
+      ppp_options['lcp-echo-interval'] = c.return_value('ppp-options lcp-echo-interval')
+    if c.exists('ppp-options ipv4'):
+      ppp_options['ipv4'] = c.return_value('ppp-options ipv4')
+    if c.exists('ppp-options ipv6'):
+      ppp_options['ipv6'] = c.return_value('ppp-options ipv6')
+    if c.exists('ppp-options ipv6-accept-peer-intf-id'):
+      ppp_options['ipv6-accept-peer-intf-id']= 1
+    if c.exists('ppp-options ipv6-intf-id'):
+      ppp_options['ipv6-intf-id'] = c.return_value('ppp-options ipv6-intf-id') 
+    if c.exists('ppp-options ipv6-peer-intf-id'):
+      ppp_options['ipv6-peer-intf-id'] = c.return_value('ppp-options ipv6-peer-intf-id')
+    if c.exists('ppp-options lcp-echo-timeout'):
+      ppp_options['lcp-echo-timeout'] = c.return_value('ppp-options lcp-echo-timeout')
+
+  if len(ppp_options) !=0:
+    config_data['ppp_options'] = ppp_options
+
+  return config_data
+
+def verify(c):
+  if c == None:
+    return None
+  ### vertify auth settings
+  if c['authentication']['mode'] == 'local':
+    if not c['authentication']['local-users']:
+      raise ConfigError('pppoe-server authentication local-users required')
+
+    for usr in c['authentication']['local-users']:
+      if not c['authentication']['local-users'][usr]['passwd']:
+        raise ConfigError('user ' + usr + ' requires a password')
+      ### if up/download is set, check that both have a value
+      if c['authentication']['local-users'][usr]['upload']:
+        if not c['authentication']['local-users'][usr]['download']:
+          raise ConfigError('user ' + usr + ' requires download speed value')
+      if c['authentication']['local-users'][usr]['download']:
+        if not c['authentication']['local-users'][usr]['upload']:
+          raise ConfigError('user ' + usr + ' requires upload speed value')
+
+  if c['authentication']['mode'] == 'radius':
+    if len(c['authentication']['radiussrv']) == 0:
+      raise ConfigError('radius server required')
+    for rsrv in c['authentication']['radiussrv']:
+      if c['authentication']['radiussrv'][rsrv]['secret'] == None:
+        raise ConfigError('radius server ' + rsrv + ' needs a secret configured')
+
+  ### local ippool and gateway settings config checks
+
+  if c['client_ip_subnets'] or c['client_ip_pool']:
+    if not c['ppp_gw']:
+      raise ConfigError('pppoe-server local-ip required')
+      
+  if c['ppp_gw'] and not c['client_ip_subnets'] and not c['client_ip_pool']:
+    print ("Warning: No pppoe client IPv4 pool defined") 
+
+def generate(c):
+  if c == None:
+    return None
+  
+  ### accel-cmd reload doesn't work so any change results in a restart of the daemon
+  try:
+    if os.cpu_count() == 1:
+      c['thread_cnt'] = 1
+    else:
+      c['thread_cnt'] = int(os.cpu_count()/2)
+  except KeyError:
+    if os.cpu_count() == 1:
+      c['thread_cnt'] = 1
+    else:
+      c['thread_cnt'] = int(os.cpu_count()/2)
+
+  tmpl = jinja2.Template(pppoe_config, trim_blocks=True)
+  config_text = tmpl.render(c)
+  open(pppoe_conf,'w').write(config_text)
+
+  if c['authentication']['local-users']:
+      write_chap_secrets(c)
+
+  return c
+
+def apply(c):
+  if c == None:
+    if os.path.exists(pidfile):
+      accel_cmd('shutdown hard')
+      if os.path.exists(pidfile):
+        os.remove(pidfile)
+    return None
+
+  if not os.path.exists(pidfile):
+    ret = subprocess.call(['/usr/sbin/accel-pppd','-c',pppoe_conf,'-p',pidfile,'-d'])
+    chk_con()
+    if ret !=0 and os.path.exists(pidfile):
+      os.remove(pidfile)
+      raise ConfigError('accel-pppd failed to start')
+  else:
+    accel_cmd('restart')
+    sl.syslog(sl.LOG_NOTICE, "reloading config via daemon restart")
+
+if __name__ == '__main__':
+  try:
+    c = get_config()
+    verify(c)
+    generate(c)
+    apply(c)
+  except ConfigError as e:
+    print(e)
+    sys.exit(1)