summaryrefslogtreecommitdiff
path: root/src/conf_mode/service-pppoe.py
blob: 6aec9be9812dd00d93c3da15ff25099f4d40d04d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
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)