summaryrefslogtreecommitdiff
path: root/src/conf_mode/interfaces-wireless.py
blob: 9cbb4c1cdf4f89f4475389dba17f41e0eea8ddc4 (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
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
#!/usr/bin/env python3
#
# Copyright (C) 2019 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 jinja2 import Template
from copy import deepcopy
from sys import exit
from stat import S_IRWXU,S_IRGRP,S_IXGRP,S_IROTH,S_IXOTH
from pwd import getpwnam
from grp import getgrnam

from subprocess import Popen, PIPE
from psutil import pid_exists

from vyos.ifconfig import EthernetIf
from vyos.ifconfig_vlan import apply_vlan_config, verify_vlan_config
from vyos.configdict import list_diff, vlan_to_dict
from vyos.config import Config
from vyos import ConfigError

user = 'root'
group = 'vyattacfg'

# Please be careful if you edit the template.
config_hostapd_tmpl = """
### Autogenerated by interfaces-wireless.py ###
{% if description %}
# Description: {{ description }}
# User-friendly description of device; up to 32 octets encoded in UTF-8
device_name={{ description | truncate(32, True) }}
{% endif %}

# AP netdevice name (without 'ap' postfix, i.e., wlan0 uses wlan0ap for
# management frames with the Host AP driver); wlan0 with many nl80211 drivers
# Note: This attribute can be overridden by the values supplied with the '-i'
# command line parameter.
interface={{ intf }}

# Driver interface type (hostap/wired/none/nl80211/bsd);
# default: hostap). nl80211 is used with all Linux mac80211 drivers.
# Use driver=none if building hostapd as a standalone RADIUS server that does
# not control any wireless/wired driver.
driver=nl80211

#
# What about bridge?
#   bridge=br0
#   wds_sta=1
#

# Levels (minimum value for logged events):
#  0 = verbose debugging
#  1 = debugging
#  2 = informational messages
#  3 = notification
#  4 = warning
logger_syslog=-1
logger_syslog_level=0
logger_stdout=-1
logger_stdout_level=0

{%- if country_code %}

# Country code (ISO/IEC 3166-1). Used to set regulatory domain.
# Set as needed to indicate country in which device is operating.
# This can limit available channels and transmit power.
country_code={{ country_code }}

# Enable IEEE 802.11d. This advertises the country_code and the set of allowed
# channels and transmit power levels based on the regulatory limits. The
# country_code setting must be configured with the correct country for
# IEEE 802.11d functions.
ieee80211d=1
{% endif %}

{%- if ssid %}

# SSID to be used in IEEE 802.11 management frames
ssid={{ ssid }}
{% endif %}

{%- if channel %}

# Channel number (IEEE 802.11)
# (default: 0, i.e., not set)
# Please note that some drivers do not use this value from hostapd and the
# channel will need to be configured separately with iwconfig.
#
# If CONFIG_ACS build option is enabled, the channel can be selected
# automatically at run time by setting channel=acs_survey or channel=0, both of
# which will enable the ACS survey based algorithm.
channel={{ channel }}
{% endif %}

{%- if mode %}

# Operation mode (a = IEEE 802.11a (5 GHz), b = IEEE 802.11b (2.4 GHz),
# g = IEEE 802.11g (2.4 GHz), ad = IEEE 802.11ad (60 GHz); a/g options are used
# with IEEE 802.11n (HT), too, to specify band). For IEEE 802.11ac (VHT), this
# needs to be set to hw_mode=a. For IEEE 802.11ax (HE) on 6 GHz this needs
# to be set to hw_mode=a. When using ACS (see channel parameter), a
# special value "any" can be used to indicate that any support band can be used.
# This special case is currently supported only with drivers with which
# offloaded ACS is used.
{% if 'n' in mode -%}
hw_mode=g
ieee80211n=1
{% elif 'ac' in mode -%}
hw_mode=a
ieee80211h=1
ieee80211ac=1
{% else -%}
hw_mode={{ mode }}
{% endif %}
{% endif %}

# ieee80211w: Whether management frame protection (MFP) is enabled
# 0 = disabled (default)
# 1 = optional
# 2 = required
{% if 'disabled' in mgmt_frame_protection -%}
ieee80211w=0
{% elif 'optional' in mgmt_frame_protection -%}
ieee80211w=1
{% elif 'required' in mgmt_frame_protection -%}
ieee80211w=2
{% endif %}

# ht_capab: HT capabilities (list of flags)
# LDPC coding capability: [LDPC] = supported
# Supported channel width set: [HT40-] = both 20 MHz and 40 MHz with secondary
#	channel below the primary channel; [HT40+] = both 20 MHz and 40 MHz
#	with secondary channel above the primary channel
#	(20 MHz only if neither is set)
#	Note: There are limits on which channels can be used with HT40- and
#	HT40+. Following table shows the channels that may be available for
#	HT40- and HT40+ use per IEEE 802.11n Annex J:
#	freq		HT40-		HT40+
#	2.4 GHz		5-13		1-7 (1-9 in Europe/Japan)
#	5 GHz		40,48,56,64	36,44,52,60
#	(depending on the location, not all of these channels may be available
#	for use)
#	Please note that 40 MHz channels may switch their primary and secondary
#	channels if needed or creation of 40 MHz channel maybe rejected based
#	on overlapping BSSes. These changes are done automatically when hostapd
#	is setting up the 40 MHz channel.
# Spatial Multiplexing (SM) Power Save: [SMPS-STATIC] or [SMPS-DYNAMIC]
#	(SMPS disabled if neither is set)
# HT-greenfield: [GF] (disabled if not set)
# Short GI for 20 MHz: [SHORT-GI-20] (disabled if not set)
# Short GI for 40 MHz: [SHORT-GI-40] (disabled if not set)
# Tx STBC: [TX-STBC] (disabled if not set)
# Rx STBC: [RX-STBC1] (one spatial stream), [RX-STBC12] (one or two spatial
#	streams), or [RX-STBC123] (one, two, or three spatial streams); Rx STBC
#	disabled if none of these set
# HT-delayed Block Ack: [DELAYED-BA] (disabled if not set)
# Maximum A-MSDU length: [MAX-AMSDU-7935] for 7935 octets (3839 octets if not
#	set)
# DSSS/CCK Mode in 40 MHz: [DSSS_CCK-40] = allowed (not allowed if not set)
# 40 MHz intolerant [40-INTOLERANT] (not advertised if not set)
# L-SIG TXOP protection support: [LSIG-TXOP-PROT] (disabled if not set)
{% if cap_ht %}
ht_capab=
{%- endif -%}

{%- if cap_ht_40mhz_incapable -%}
[40-INTOLERANT]
{%- endif -%}

{%- if cap_ht_delayed_block_ack -%}
[DELAYED-BA]
{%- endif -%}

{%- if cap_ht_dsss_cck_40 -%}
[DSSS_CCK-40]
{%- endif -%}

{%- if cap_ht_greenfield -%}
[GF]
{%- endif -%}

{%- if cap_ht_ldpc -%}
[LDPC]
{%- endif -%}

{%- if cap_ht_lsig_protection -%}
[LSIG-TXOP-PROT]
{%- endif -%}

{%- if cap_ht_max_amsdu -%}
[MAX-AMSDU-{{ cap_ht_max_amsdu }}]
{%- endif -%}

{%- if cap_ht_smps -%}
[SMPS-{{ cap_ht_smps | upper }}]
{%- endif -%}

{%- if cap_ht_chan_set_width -%}
{%- for csw in cap_ht_chan_set_width -%}
[{{ csw | upper }}]
{%- endfor -%}
{%- endif -%}

{%- if cap_ht_short_gi -%}
{%- for gi in cap_ht_short_gi -%}
[SHORT-GI-{{ gi }}]
{%- endfor -%}
{%- endif -%}

{%- if cap_ht_stbc_tx -%}
[TX-STBC]
{%- endif -%}
{%- if cap_ht_stbc_rx -%}
[RX-STBC{{ cap_ht_stbc_rx }}]
{%- endif %}

# Required for full HT and VHT functionality
wme_enabled=1

{% if cap_ht_powersave -%}
# WMM-PS Unscheduled Automatic Power Save Delivery [U-APSD]
# Enable this flag if U-APSD supported outside hostapd (eg., Firmware/driver)
uapsd_advertisement_enabled=1
{%- endif %}

{% if cap_req_ht -%}
# Require stations to support HT PHY (reject association if they do not)
require_ht=1
{% endif %}

# vht_capab: VHT capabilities (list of flags)
#
# vht_max_mpdu_len: [MAX-MPDU-7991] [MAX-MPDU-11454]
# Indicates maximum MPDU length
# 0 = 3895 octets (default)
# 1 = 7991 octets
# 2 = 11454 octets
# 3 = reserved
#
# supported_chan_width: [VHT160] [VHT160-80PLUS80]
# Indicates supported Channel widths
# 0 = 160 MHz & 80+80 channel widths are not supported (default)
# 1 = 160 MHz channel width is supported
# 2 = 160 MHz & 80+80 channel widths are supported
# 3 = reserved
#
# Rx LDPC coding capability: [RXLDPC]
# Indicates support for receiving LDPC coded pkts
# 0 = Not supported (default)
# 1 = Supported
#
# Short GI for 80 MHz: [SHORT-GI-80]
# Indicates short GI support for reception of packets transmitted with TXVECTOR
# params format equal to VHT and CBW = 80Mhz
# 0 = Not supported (default)
# 1 = Supported
#
# Short GI for 160 MHz: [SHORT-GI-160]
# Indicates short GI support for reception of packets transmitted with TXVECTOR
# params format equal to VHT and CBW = 160Mhz
# 0 = Not supported (default)
# 1 = Supported
#
# Tx STBC: [TX-STBC-2BY1]
# Indicates support for the transmission of at least 2x1 STBC
# 0 = Not supported (default)
# 1 = Supported
#
# Rx STBC: [RX-STBC-1] [RX-STBC-12] [RX-STBC-123] [RX-STBC-1234]
# Indicates support for the reception of PPDUs using STBC
# 0 = Not supported (default)
# 1 = support of one spatial stream
# 2 = support of one and two spatial streams
# 3 = support of one, two and three spatial streams
# 4 = support of one, two, three and four spatial streams
# 5,6,7 = reserved
#
# SU Beamformer Capable: [SU-BEAMFORMER]
# Indicates support for operation as a single user beamformer
# 0 = Not supported (default)
# 1 = Supported
#
# SU Beamformee Capable: [SU-BEAMFORMEE]
# Indicates support for operation as a single user beamformee
# 0 = Not supported (default)
# 1 = Supported
#
# Compressed Steering Number of Beamformer Antennas Supported:
# [BF-ANTENNA-2] [BF-ANTENNA-3] [BF-ANTENNA-4]
#   Beamformee's capability indicating the maximum number of beamformer
#   antennas the beamformee can support when sending compressed beamforming
#   feedback
# If SU beamformer capable, set to maximum value minus 1
# else reserved (default)
#
# Number of Sounding Dimensions:
# [SOUNDING-DIMENSION-2] [SOUNDING-DIMENSION-3] [SOUNDING-DIMENSION-4]
# Beamformer's capability indicating the maximum value of the NUM_STS parameter
# in the TXVECTOR of a VHT NDP
# If SU beamformer capable, set to maximum value minus 1
# else reserved (default)
#
# MU Beamformer Capable: [MU-BEAMFORMER]
# Indicates support for operation as an MU beamformer
# 0 = Not supported or sent by Non-AP STA (default)
# 1 = Supported
#
# VHT TXOP PS: [VHT-TXOP-PS]
# Indicates whether or not the AP supports VHT TXOP Power Save Mode
#  or whether or not the STA is in VHT TXOP Power Save mode
# 0 = VHT AP doesn't support VHT TXOP PS mode (OR) VHT STA not in VHT TXOP PS
#  mode
# 1 = VHT AP supports VHT TXOP PS mode (OR) VHT STA is in VHT TXOP power save
#  mode
#
# +HTC-VHT Capable: [HTC-VHT]
# Indicates whether or not the STA supports receiving a VHT variant HT Control
# field.
# 0 = Not supported (default)
# 1 = supported
#
# Maximum A-MPDU Length Exponent: [MAX-A-MPDU-LEN-EXP0]..[MAX-A-MPDU-LEN-EXP7]
# Indicates the maximum length of A-MPDU pre-EOF padding that the STA can recv
# This field is an integer in the range of 0 to 7.
# The length defined by this field is equal to
# 2 pow(13 + Maximum A-MPDU Length Exponent) -1 octets
#
# VHT Link Adaptation Capable: [VHT-LINK-ADAPT2] [VHT-LINK-ADAPT3]
# Indicates whether or not the STA supports link adaptation using VHT variant
# HT Control field
# If +HTC-VHTcapable is 1
#  0 = (no feedback) if the STA does not provide VHT MFB (default)
#  1 = reserved
#  2 = (Unsolicited) if the STA provides only unsolicited VHT MFB
#  3 = (Both) if the STA can provide VHT MFB in response to VHT MRQ and if the
#      STA provides unsolicited VHT MFB
# Reserved if +HTC-VHTcapable is 0
#
# Rx Antenna Pattern Consistency: [RX-ANTENNA-PATTERN]
# Indicates the possibility of Rx antenna pattern change
# 0 = Rx antenna pattern might change during the lifetime of an association
# 1 = Rx antenna pattern does not change during the lifetime of an association
#
# Tx Antenna Pattern Consistency: [TX-ANTENNA-PATTERN]
# Indicates the possibility of Tx antenna pattern change
# 0 = Tx antenna pattern might change during the lifetime of an association
# 1 = Tx antenna pattern does not change during the lifetime of an association
{% if cap_vht %}
vht_capab=
{%- endif -%}

{%- if cap_vht_max_mpdu -%}
[MAX-MPDU-{{ cap_vht_max_mpdu }}]
{%- endif -%}

{%- if cap_vht_max_mpdu_exp -%}
[MAX-A-MPDU-LEN-EXP{{ cap_vht_max_mpdu_exp }}]
{%- endif -%}

{%- if cap_vht_chan_set_width -%}
[MAX-A-MPDU-LEN-EXP{{ cap_vht_max_mpdu_exp }}]
{%- endif -%}

{%- if cap_vht_chan_set_width -%}
{%- if '2' in cap_vht_chan_set_width -%}
[VHT160]
{%- elif '3' in cap_vht_chan_set_width -%}
[VHT160-80PLUS80]
{%- endif -%}
{%- endif -%}

{%- if cap_vht_stbc_tx -%}
[TX-STBC-2BY1]
{%- endif -%}

{%- if cap_vht_stbc_rx -%}
[RX-STBC-{{ cap_vht_stbc_rx }}]
{%- endif -%}

{%- if cap_vht_link_adaptation -%}
{%- if 'unsolicited' in cap_vht_link_adaptation -%}
[VHT-LINK-ADAPT2]
{%- elif 'both' in cap_vht_link_adaptation -%}
[VHT-LINK-ADAPT3]
{%- endif -%}
{%- endif -%}

{%- if cap_vht_short_gi -%}
{%- for gi in cap_vht_short_gi -%}
[SHORT-GI-{{ gi }}]
{%- endfor -%}
{%- endif -%}

{%- if cap_vht_ldpc -%}
[RXLDPC]
{%- endif -%}

{%- if cap_vht_tx_powersave -%}
[VHT-TXOP-PS]
{%- endif -%}

{%- if cap_vht_vht_cf -%}
[HTC-VHT]
{%- endif -%}

{%- if cap_vht_beamform -%}
{%- for beamform in cap_vht_beamform -%}
{%- if 'single-user-beamformer' in beamform -%}
[SU-BEAMFORMER]
{%- elif 'single-user-beamformee' in beamform -%}
[SU-BEAMFORMEE]
{%- elif 'multi-user-beamformer' in beamform -%}
[MU-BEAMFORMER]
{%- elif 'multi-user-beamformee' in beamform -%}
[MU-BEAMFORMEE]
{%- endif -%}
{%- endfor -%}
{%- endif -%}

{%- if cap_vht_antenna_fixed -%}
[RX-ANTENNA-PATTERN][TX-ANTENNA-PATTERN]
{%- endif -%}

{%- if cap_vht_antenna_cnt -%}
{%- for beamform in cap_vht_beamform -%}
{%- if 'single-user-beamformer' in beamform -%}
[BF-ANTENNA-{{ cap_vht_antenna_cnt|int -1 }}][SOUNDING-DIMENSION-{{ cap_vht_antenna_cnt|int -1}}]
{%- else -%}
[BF-ANTENNA-{{ cap_vht_antenna_cnt }}][SOUNDING-DIMENSION-{{ cap_vht_antenna_cnt }}]
{%- endif -%}
{%- endfor -%}
{%- endif %}

# ieee80211n: Whether IEEE 802.11n (HT) is enabled
# 0 = disabled (default)
# 1 = enabled
# Note: You will also need to enable WMM for full HT functionality.
# Note: hw_mode=g (2.4 GHz) and hw_mode=a (5 GHz) is used to specify the band.
{% if cap_req_vht -%}
ieee80211n=0
# Require stations to support VHT PHY (reject association if they do not)
require_vht=1
{% endif %}

{% if cap_vht_center_freq_1 -%}
# center freq = 5 GHz + (5 * index)
# So index 42 gives center freq 5.210 GHz
# which is channel 42 in 5G band
vht_oper_centr_freq_seg0_idx={{ cap_vht_center_freq_1 }}
{% endif %}

{% if cap_vht_center_freq_2 -%}
# center freq = 5 GHz + (5 * index)
# So index 159 gives center freq 5.795 GHz
# which is channel 159 in 5G band
vht_oper_centr_freq_seg1_idx={{ cap_vht_center_freq_2 }}
{% endif %}

{% if disable_broadcast_ssid -%}
# Send empty SSID in beacons and ignore probe request frames that do not
# specify full SSID, i.e., require stations to know SSID.
# default: disabled (0)
# 1 = send empty (length=0) SSID in beacon and ignore probe request for
#     broadcast SSID
# 2 = clear SSID (ASCII 0), but keep the original length (this may be required
#     with some clients that do not support empty SSID) and ignore probe
#     requests for broadcast SSID
ignore_broadcast_ssid=1
{% endif %}

# Station MAC address -based authentication
# Please note that this kind of access control requires a driver that uses
# hostapd to take care of management frame processing and as such, this can be
# used with driver=hostap or driver=nl80211, but not with driver=atheros.
# 0 = accept unless in deny list
# 1 = deny unless in accept list
# 2 = use external RADIUS server (accept/deny lists are searched first)
macaddr_acl=0

{% if max_stations -%}
# Maximum number of stations allowed in station table. New stations will be
# rejected after the station table is full. IEEE 802.11 has a limit of 2007
# different association IDs, so this number should not be larger than that.
# (default: 2007)
max_num_sta={{ max_stations }}
{% endif %}

{% if isolate_stations -%}
# Client isolation can be used to prevent low-level bridging of frames between
# associated stations in the BSS. By default, this bridging is allowed.
ap_isolate=1
{% endif %}

{% if reduce_transmit_power -%}
# Add Power Constraint element to Beacon and Probe Response frames
# This config option adds Power Constraint element when applicable and Country
# element is added. Power Constraint element is required by Transmit Power
# Control. This can be used only with ieee80211d=1.
# Valid values are 0..255.
local_pwr_constraint={{ reduce_transmit_power }}
{% endif %}

{% if expunge_failing_stations -%}
# Disassociate stations based on excessive transmission failures or other
# indications of connection loss. This depends on the driver capabilities and
# may not be available with all drivers.
disassoc_low_ack=1
{% endif %}

{% if sec_wep -%}
# IEEE 802.11 specifies two authentication algorithms. hostapd can be
# configured to allow both of these or only one. Open system authentication
# should be used with IEEE 802.1X.
# Bit fields of allowed authentication algorithms:
# bit 0 = Open System Authentication
# bit 1 = Shared Key Authentication (requires WEP)
auth_algs=2

# WEP rekeying (disabled if key lengths are not set or are set to 0)
# Key lengths for default/broadcast and individual/unicast keys:
# 5 = 40-bit WEP (also known as 64-bit WEP with 40 secret bits)
# 13 = 104-bit WEP (also known as 128-bit WEP with 104 secret bits)
wep_key_len_broadcast=5
wep_key_len_unicast=5

# Static WEP key configuration
#
# The key number to use when transmitting.
# It must be between 0 and 3, and the corresponding key must be set.
# default: not set
wep_default_key=0

# The WEP keys to use.
# A key may be a quoted string or unquoted hexadecimal digits.
# The key length should be 5, 13, or 16 characters, or 10, 26, or 32
# digits, depending on whether 40-bit (64-bit), 104-bit (128-bit), or
# 128-bit (152-bit) WEP is used.
# Only the default key must be supplied; the others are optional.
{% if sec_wep_key -%}
{% for key in sec_wep_key -%}
wep_key{{ loop.index -1 }}={{ key}}
{% endfor %}
{%- endif %}

{% elif sec_wpa -%}
##### WPA/IEEE 802.11i configuration ##########################################

# Enable WPA. Setting this variable configures the AP to require WPA (either
# WPA-PSK or WPA-RADIUS/EAP based on other configuration). For WPA-PSK, either
# wpa_psk or wpa_passphrase must be set and wpa_key_mgmt must include WPA-PSK.
# Instead of wpa_psk / wpa_passphrase, wpa_psk_radius might suffice.
# For WPA-RADIUS/EAP, ieee8021x must be set (but without dynamic WEP keys),
# RADIUS authentication server must be configured, and WPA-EAP must be included
# in wpa_key_mgmt.
# This field is a bit field that can be used to enable WPA (IEEE 802.11i/D3.0)
# and/or WPA2 (full IEEE 802.11i/RSN):
# bit0 = WPA
# bit1 = IEEE 802.11i/RSN (WPA2) (dot11RSNAEnabled)
{% if 'both' in sec_wpa_mode -%}
wpa=3
{%- elif 'wpa2' in sec_wpa_mode -%}
wpa=2
{%- elif 'wpa' in sec_wpa_mode -%}
wpa=1
{%- endif %}

{% if sec_wpa_cipher -%}
# Set of accepted cipher suites (encryption algorithms) for pairwise keys
# (unicast packets). This is a space separated list of algorithms:
# CCMP = AES in Counter mode with CBC-MAC (CCMP-128)
# TKIP = Temporal Key Integrity Protocol
# CCMP-256 = AES in Counter mode with CBC-MAC with 256-bit key
# GCMP = Galois/counter mode protocol (GCMP-128)
# GCMP-256 = Galois/counter mode protocol with 256-bit key
# Group cipher suite (encryption algorithm for broadcast and multicast frames)
# is automatically selected based on this configuration. If only CCMP is
# allowed as the pairwise cipher, group cipher will also be CCMP. Otherwise,
# TKIP will be used as the group cipher. The optional group_cipher parameter can
# be used to override this automatic selection.
{% if 'wpa2' in sec_wpa_mode -%}
# Pairwise cipher for RSN/WPA2 (default: use wpa_pairwise value)
rsn_pairwise={{ sec_wpa_cipher | join(" ") }}
{% else -%}
# Pairwise cipher for WPA (v1) (default: TKIP)
wpa_pairwise={{ sec_wpa_cipher | join(" ") }}
{%- endif -%}
{% endif %}

{% if sec_wpa_passphrase -%}
# IEEE 802.11 specifies two authentication algorithms. hostapd can be
# configured to allow both of these or only one. Open system authentication
# should be used with IEEE 802.1X.
# Bit fields of allowed authentication algorithms:
# bit 0 = Open System Authentication
# bit 1 = Shared Key Authentication (requires WEP)
auth_algs=1

# WPA pre-shared keys for WPA-PSK. This can be either entered as a 256-bit
# secret in hex format (64 hex digits), wpa_psk, or as an ASCII passphrase
# (8..63 characters) that will be converted to PSK. This conversion uses SSID
# so the PSK changes when ASCII passphrase is used and the SSID is changed.
wpa_passphrase={{ sec_wpa_passphrase }}

# Set of accepted key management algorithms (WPA-PSK, WPA-EAP, or both). The
# entries are separated with a space. WPA-PSK-SHA256 and WPA-EAP-SHA256 can be
# added to enable SHA256-based stronger algorithms.
# WPA-PSK = WPA-Personal / WPA2-Personal
# WPA-PSK-SHA256 = WPA2-Personal using SHA256
wpa_key_mgmt=WPA-PSK

{% elif sec_wpa_radius -%}
##### IEEE 802.1X-2004 related configuration ##################################
# Require IEEE 802.1X authorization
ieee8021x=1

# Set of accepted key management algorithms (WPA-PSK, WPA-EAP, or both). The
# entries are separated with a space. WPA-PSK-SHA256 and WPA-EAP-SHA256 can be
# added to enable SHA256-based stronger algorithms.
# WPA-EAP = WPA-Enterprise / WPA2-Enterprise
# WPA-EAP-SHA256 = WPA2-Enterprise using SHA256
wpa_key_mgmt=WPA-EAP

{% if sec_wpa_radius_source -%}
# RADIUS client forced local IP address for the access point
# Normally the local IP address is determined automatically based on configured
# IP addresses, but this field can be used to force a specific address to be
# used, e.g., when the device has multiple IP addresses.
radius_client_addr={{ sec_wpa_radius_source }}

# The own IP address of the access point (used as NAS-IP-Address)
own_ip_addr={{ sec_wpa_radius_source }}
{% else %}
# The own IP address of the access point (used as NAS-IP-Address)
own_ip_addr=127.0.0.1
{% endif %}

{% for radius in sec_wpa_radius -%}
{%- if not radius.disabled -%}
# RADIUS authentication server
auth_server_addr={{ radius.server }}
auth_server_port={{ radius.port }}
auth_server_shared_secret={{ radius.key }}
{% if radius.acc_port -%}
# RADIUS accounting server
acct_server_addr={{ radius.server }}
acct_server_port={{ radius.acc_port }}
acct_server_shared_secret={{ radius.key }}
{% endif %}
{% endif %}
{% endfor %}

{% endif %}

{% else %}
# Open system
auth_algs=1
{% endif %}

# TX queue parameters (EDCF / bursting)
# tx_queue_<queue name>_<param>
# queues: data0, data1, data2, data3
#		(data0 is the highest priority queue)
# parameters:
#   aifs: AIFS (default 2)
#   cwmin: cwMin (1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191,
#	   16383, 32767)
#   cwmax: cwMax (same values as cwMin, cwMax >= cwMin)
#   burst: maximum length (in milliseconds with precision of up to 0.1 ms) for
#          bursting
#
# Default WMM parameters (IEEE 802.11 draft; 11-03-0504-03-000e):
# These parameters are used by the access point when transmitting frames
# to the clients.
#
# Low priority / AC_BK = background
tx_queue_data3_aifs=7
tx_queue_data3_cwmin=15
tx_queue_data3_cwmax=1023
tx_queue_data3_burst=0
# Note: for IEEE 802.11b mode: cWmin=31 cWmax=1023 burst=0
#
# Normal priority / AC_BE = best effort
tx_queue_data2_aifs=3
tx_queue_data2_cwmin=15
tx_queue_data2_cwmax=63
tx_queue_data2_burst=0
# Note: for IEEE 802.11b mode: cWmin=31 cWmax=127 burst=0
#
# High priority / AC_VI = video
tx_queue_data1_aifs=1
tx_queue_data1_cwmin=7
tx_queue_data1_cwmax=15
tx_queue_data1_burst=3.0
# Note: for IEEE 802.11b mode: cWmin=15 cWmax=31 burst=6.0
#
# Highest priority / AC_VO = voice
tx_queue_data0_aifs=1
tx_queue_data0_cwmin=3
tx_queue_data0_cwmax=7
tx_queue_data0_burst=1.5

# Default WMM parameters (IEEE 802.11 draft; 11-03-0504-03-000e):
# for 802.11a or 802.11g networks
# These parameters are sent to WMM clients when they associate.
# The parameters will be used by WMM clients for frames transmitted to the
# access point.
#
# note - txop_limit is in units of 32microseconds
# note - acm is admission control mandatory flag. 0 = admission control not
# required, 1 = mandatory
# note - Here cwMin and cmMax are in exponent form. The actual cw value used
# will be (2^n)-1 where n is the value given here. The allowed range for these
# wmm_ac_??_{cwmin,cwmax} is 0..15 with cwmax >= cwmin.
#
wmm_enabled=1

# Low priority / AC_BK = background
wmm_ac_bk_cwmin=4
wmm_ac_bk_cwmax=10
wmm_ac_bk_aifs=7
wmm_ac_bk_txop_limit=0
wmm_ac_bk_acm=0
# Note: for IEEE 802.11b mode: cWmin=5 cWmax=10
#
# Normal priority / AC_BE = best effort
wmm_ac_be_aifs=3
wmm_ac_be_cwmin=4
wmm_ac_be_cwmax=10
wmm_ac_be_txop_limit=0
wmm_ac_be_acm=0
# Note: for IEEE 802.11b mode: cWmin=5 cWmax=7
#
# High priority / AC_VI = video
wmm_ac_vi_aifs=2
wmm_ac_vi_cwmin=3
wmm_ac_vi_cwmax=4
wmm_ac_vi_txop_limit=94
wmm_ac_vi_acm=0
# Note: for IEEE 802.11b mode: cWmin=4 cWmax=5 txop_limit=188
#
# Highest priority / AC_VO = voice
wmm_ac_vo_aifs=2
wmm_ac_vo_cwmin=2
wmm_ac_vo_cwmax=3
wmm_ac_vo_txop_limit=47
wmm_ac_vo_acm=0

"""

# Please be careful if you edit the template.
config_wpa_suppl_tmpl = """
# WPA supplicant config
network={
    ssid="{{ ssid }}"
{%- if sec_wpa_passphrase %}
    psk="{{ sec_wpa_passphrase }}"
{% else %}
    key_mgmt=NONE
{% endif %}
}

"""

default_config_data = {
    'address': [],
    'address_remove': [],
    'cap_ht' : False,
    'cap_ht_40mhz_incapable' : False,
    'cap_ht_powersave' : False,
    'cap_ht_chan_set_width' : '',
    'cap_ht_delayed_block_ack' : False,
    'cap_ht_dsss_cck_40' : False,
    'cap_ht_greenfield' : False,
    'cap_ht_ldpc' : False,
    'cap_ht_lsig_protection' : False,
    'cap_ht_max_amsdu' : '',
    'cap_ht_short_gi' :  [],
    'cap_ht_smps' : '',
    'cap_ht_stbc_rx' : '',
    'cap_ht_stbc_tx' : False,
    'cap_req_ht' : False,
    'cap_req_vht' : False,
    'cap_vht' : False,
    'cap_vht_antenna_cnt' : '',
    'cap_vht_antenna_fixed' : False,
    'cap_vht_beamform' : '',
    'cap_vht_center_freq_1' : '',
    'cap_vht_center_freq_2' : '',
    'cap_vht_chan_set_width' : '',
    'cap_vht_ldpc' : False,
    'cap_vht_link_adaptation' : False,
    'cap_vht_max_mpdu_exp' : '',
    'cap_vht_max_mpdu' : '',
    'cap_vht_short_gi' : [],
    'cap_vht_stbc_rx' : '',
    'cap_vht_stbc_tx' : False,
    'cap_vht_tx_powersave' : False,
    'cap_vht_vht_cf' : False,
    'channel': '',
    'country_code': '',
    'description': '',
    'deleted': False,
    'dhcp_client_id': '',
    'dhcp_hostname': '',
    'dhcp_vendor_class_id': '',
    'dhcpv6_prm_only': False,
    'dhcpv6_temporary': False,
    'disable': False,
    'disable_broadcast_ssid' : False,
    'disable_link_detect' : 1,
    'expunge_failing_stations' : False,
    'hw_id' : '',
    'intf': '',
    'isolate_stations' : False,
    'ip_disable_arp_filter': 1,
    'ip_enable_arp_accept': 0,
    'ip_enable_arp_announce': 0,
    'ip_enable_arp_ignore': 0,
    'mac' : '',
    'max_stations' : '',
    'mgmt_frame_protection' : 'disabled',
    'mode' : 'g',
    'phy' : '',
    'reduce_transmit_power' : '',
    'sec_wep' : False,
    'sec_wep_key' : [],
    'sec_wpa' : False,
    'sec_wpa_cipher' : [],
    'sec_wpa_mode' : 'both',
    'sec_wpa_passphrase' : '',
    'sec_wpa_radius' : [],
    'ssid' : '',
    'type' : 'monitor',
    'vif': [],
    'vif_remove': [],
    'vrf': ''
}

def get_conf_file(conf_type, intf):
    cfg_dir = '/var/run/' + conf_type

    # create directory on demand
    if not os.path.exists(cfg_dir):
        os.mkdir(cfg_dir)
        # fix permissions - corresponds to mode 755
        os.chmod(cfg_dir, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
        uid = getpwnam(user).pw_uid
        gid = getgrnam(group).gr_gid
        os.chown(cfg_dir, uid, gid)

    cfg_file = cfg_dir + r'/{}.cfg'.format(intf)
    return cfg_file

def get_pid(conf_type, intf):
    cfg_dir = '/var/run/' + conf_type

    # create directory on demand
    if not os.path.exists(cfg_dir):
        os.mkdir(cfg_dir)
        # fix permissions - corresponds to mode 755
        os.chmod(cfg_dir, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
        uid = getpwnam(user).pw_uid
        gid = getgrnam(group).gr_gid
        os.chown(cfg_dir, uid, gid)

    cfg_file = cfg_dir + r'/{}.pid'.format(intf)
    return cfg_file


def get_wpa_suppl_config_name(intf):
    cfg_dir = '/var/run/wpa_supplicant'

    # create directory on demand
    if not os.path.exists(cfg_dir):
        os.mkdir(cfg_dir)
        # fix permissions - corresponds to mode 755
        os.chmod(cfg_dir, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
        uid = getpwnam(user).pw_uid
        gid = getgrnam(group).gr_gid
        os.chown(cfg_dir, uid, gid)

    cfg_file = cfg_dir + r'/{}.cfg'.format(intf)
    return cfg_file

def subprocess_cmd(command):
    p = Popen(command, stdout=PIPE, shell=True)
    p.communicate()

def get_config():
    wifi = deepcopy(default_config_data)
    conf = Config()

    # determine tagNode instance
    if 'VYOS_TAGNODE_VALUE' not in os.environ:
        raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified')

    wifi['intf'] = os.environ['VYOS_TAGNODE_VALUE']

    # check if wireless interface has been removed
    cfg_base = 'interfaces wireless ' + wifi['intf']
    if not conf.exists(cfg_base):
        wifi['deleted'] = True
        # we can not bail out early as wireless interface can not be removed
        # Kernel will complain with: RTNETLINK answers: Operation not supported.
        # Thus we need to remove individual settings
        return wifi

    # set new configuration level
    conf.set_level(cfg_base)

    # retrieve configured interface addresses
    if conf.exists('address'):
        wifi['address'] = conf.return_values('address')

    # get interface addresses (currently effective) - to determine which
    # address is no longer valid and needs to be removed
    eff_addr = conf.return_effective_values('address')
    wifi['address_remove'] = list_diff(eff_addr, wifi['address'])

    # 40MHz intolerance, use 20MHz only
    if conf.exists('capabilities ht 40mhz-incapable'):
        wifi['cap_ht'] = True
        wifi['cap_ht_40mhz_incapable'] = True

    # WMM-PS Unscheduled Automatic Power Save Delivery [U-APSD]
    if conf.exists('capabilities ht auto-powersave'):
        wifi['cap_ht'] = True
        wifi['cap_ht_powersave'] = True

    # Supported channel set width
    if conf.exists('capabilities ht channel-set-width'):
        wifi['cap_ht'] = True
        wifi['cap_ht_chan_set_width'] = conf.return_values('capabilities ht channel-set-width')

    # HT-delayed Block Ack
    if conf.exists('capabilities ht delayed-block-ack'):
        wifi['cap_ht'] = True
        wifi['cap_ht_delayed_block_ack'] = True

    # DSSS/CCK Mode in 40 MHz
    if conf.exists('capabilities ht dsss-cck-40'):
        wifi['cap_ht'] = True
        wifi['cap_ht_dsss_cck_40'] = True

    # HT-greenfield capability
    if conf.exists('capabilities ht greenfield'):
        wifi['cap_ht'] = True
        wifi['cap_ht_greenfield'] = True

    # LDPC coding capability
    if conf.exists('capabilities ht ldpc'):
        wifi['cap_ht'] = True
        wifi['cap_ht_ldpc'] = True

    # L-SIG TXOP protection capability
    if conf.exists('capabilities ht lsig-protection'):
        wifi['cap_ht'] = True
        wifi['cap_ht_lsig_protection'] = True

    # Set Maximum A-MSDU length
    if conf.exists('capabilities ht max-amsdu'):
        wifi['cap_ht'] = True
        wifi['cap_ht_max_amsdu'] = conf.return_value('capabilities ht max-amsdu')

    # Short GI capabilities
    if conf.exists('capabilities ht short-gi'):
        wifi['cap_ht'] = True
        wifi['cap_ht_short_gi'] = conf.return_values('capabilities ht short-gi')

    # Spatial Multiplexing Power Save (SMPS) settings
    if conf.exists('capabilities ht smps'):
        wifi['cap_ht'] = True
        wifi['cap_ht_smps'] = conf.return_value('capabilities ht smps')

    # Support for receiving PPDU using STBC (Space Time Block Coding)
    if conf.exists('capabilities ht stbc rx'):
        wifi['cap_ht'] = True
        wifi['cap_ht_stbc_rx'] = conf.return_value('capabilities ht stbc rx')

    # Support for sending PPDU using STBC (Space Time Block Coding)
    if conf.exists('capabilities ht stbc tx'):
        wifi['cap_ht'] = True
        wifi['cap_ht_stbc_tx'] = True

    # Require stations to support HT PHY (reject association if they do not)
    if conf.exists('capabilities require-ht'):
        wifi['cap_req_ht'] = True

    # Require stations to support VHT PHY (reject association if they do not)
    if conf.exists('capabilities require-vht'):
        wifi['cap_req_vht'] = True

    # Number of antennas on this card
    if conf.exists('capabilities vht antenna-count'):
        wifi['cap_vht'] = True
        wifi['cap_vht_antenna_cnt'] = conf.return_value('capabilities vht antenna-count')

    # set if antenna pattern does not change during the lifetime of an association
    if conf.exists('capabilities vht antenna-pattern-fixed'):
        wifi['cap_vht'] = True
        wifi['cap_vht_antenna_fixed'] = True

    # Beamforming capabilities
    if conf.exists('capabilities vht beamform'):
        wifi['cap_vht'] = True
        wifi['cap_vht_beamform'] = conf.return_values('capabilities vht beamform')

    # VHT operating channel center frequency - center freq 1 (for use with 80, 80+80 and 160 modes)
    if conf.exists('capabilities vht center-channel-freq freq-1'):
        wifi['cap_vht'] = True
        wifi['cap_vht_center_freq_1'] = conf.return_value('capabilities vht center-channel-freq freq-1')

    # VHT operating channel center frequency - center freq 2 (for use with the 80+80 mode)
    if conf.exists('capabilities vht center-channel-freq freq-2'):
        wifi['cap_vht'] = True
        wifi['cap_vht_center_freq_2'] = conf.return_value('capabilities vht center-channel-freq freq-2')

    # VHT operating Channel width
    if conf.exists('capabilities vht channel-set-width'):
        wifi['cap_vht'] = True
        wifi['cap_vht_chan_set_width'] = conf.return_value('capabilities vht channel-set-width')

    # LDPC coding capability
    if conf.exists('capabilities vht ldpc'):
        wifi['cap_vht'] = True
        wifi['cap_vht_ldpc'] = True

    # VHT link adaptation capabilities
    if conf.exists('capabilities vht link-adaptation'):
        wifi['cap_vht'] = True
        wifi['cap_vht_link_adaptation'] = True

    # Set the maximum length of A-MPDU pre-EOF padding that the station can receive
    if conf.exists('capabilities vht max-mpdu-exp'):
        wifi['cap_vht'] = True
        wifi['cap_vht_max_mpdu_exp'] = conf.return_value('capabilities vht max-mpdu-exp')

    # Increase Maximum MPDU length
    if conf.exists('capabilities vht max-mpdu'):
        wifi['cap_vht'] = True
        wifi['cap_vht_max_mpdu'] = conf.return_value('capabilities vht max-mpdu')

    # Increase Maximum MPDU length
    if conf.exists('capabilities vht short-gi'):
        wifi['cap_vht'] = True
        wifi['cap_vht_short_gi'] = conf.return_values('capabilities vht short-gi')

    # Support for receiving PPDU using STBC (Space Time Block Coding)
    if conf.exists('capabilities vht stbc rx'):
        wifi['cap_vht'] = True
        wifi['cap_vht_stbc_rx'] = conf.return_value('capabilities vht stbc rx')

    # Support for the transmission of at least 2x1 STBC (Space Time Block Coding)
    if conf.exists('capabilities vht stbc tx'):
        wifi['cap_vht'] = True
        wifi['cap_vht_stbc_tx'] = True

    # Support for VHT TXOP Power Save Mode
    if conf.exists('capabilities vht tx-powersave'):
        wifi['cap_vht'] = True
        wifi['cap_vht_tx_powersave'] = True

    # STA supports receiving a VHT variant HT Control field
    if conf.exists('capabilities vht vht-cf'):
        wifi['cap_vht'] = True
        wifi['cap_vht_vht_cf'] = True

    # Wireless radio channel
    if conf.exists('channel'):
        wifi['channel'] = conf.return_value('channel')

    # retrieve interface description
    if conf.exists('description'):
        wifi['description'] = conf.return_value('description')

    # get DHCP client identifier
    if conf.exists('dhcp-options client-id'):
        wifi['dhcp_client_id'] = conf.return_value('dhcp-options client-id')

    # DHCP client host name (overrides the system host name)
    if conf.exists('dhcp-options host-name'):
        wifi['dhcp_hostname'] = conf.return_value('dhcp-options host-name')

    # DHCP client vendor identifier
    if conf.exists('dhcp-options vendor-class-id'):
        wifi['dhcp_vendor_class_id'] = conf.return_value('dhcp-options vendor-class-id')

    # DHCPv6 only acquire config parameters, no address
    if conf.exists('dhcpv6-options parameters-only'):
        wifi['dhcpv6_prm_only'] = conf.return_value('dhcpv6-options parameters-only')

    # DHCPv6 temporary IPv6 address
    if conf.exists('dhcpv6-options temporary'):
        wifi['dhcpv6_temporary'] = conf.return_value('dhcpv6-options temporary')

    # Disable broadcast of SSID from access-point
    if conf.exists('disable-broadcast-ssid'):
        wifi['disable_broadcast_ssid'] = True

    # ignore link state changes on this interface
    if conf.exists('disable-link-detect'):
        wifi['disable_link_detect'] = 2

    # Disassociate stations based on excessive transmission failures
    if conf.exists('expunge-failing-stations'):
        wifi['expunge_failing_stations'] = True

    # retrieve real hardware address
    if conf.exists('hw-id'):
        wifi['hw_id'] = conf.return_value('hw-id')

    # Isolate stations on the AP so they cannot see each other
    if conf.exists('isolate-stations'):
        wifi['isolate_stations'] = True

    # ARP filter configuration
    if conf.exists('ip disable-arp-filter'):
        wifi['ip_disable_arp_filter'] = 0

    # ARP enable accept
    if conf.exists('ip enable-arp-accept'):
        wifi['ip_enable_arp_accept'] = 1

    # ARP enable announce
    if conf.exists('ip enable-arp-announce'):
        wifi['ip_enable_arp_announce'] = 1

    # ARP enable ignore
    if conf.exists('ip enable-arp-ignore'):
        wifi['ip_enable_arp_ignore'] = 1

    # Media Access Control (MAC) address
    if conf.exists('mac'):
        wifi['mac'] = conf.return_value('mac')

    # Maximum number of wireless radio stations
    if conf.exists('max-stations'):
        wifi['max_stations'] = conf.return_value('max-stations')

    # Management Frame Protection (MFP) according to IEEE 802.11w
    if conf.exists('mgmt-frame-protection'):
        wifi['mgmt_frame_protection'] = conf.return_value('mgmt-frame-protection')

    # Wireless radio mode
    if conf.exists('mode'):
        wifi['mode'] = conf.return_value('mode')

    # retrieve VRF instance
    if conf.exists('vrf'):
        wifi['vrf'] = conf.return_value('vrf')

    # Wireless physical device
    if conf.exists('phy'):
        wifi['phy'] = conf.return_value('phy')

    # Transmission power reduction in dBm
    if conf.exists('reduce-transmit-power'):
        wifi['reduce_transmit_power'] = conf.return_value('reduce-transmit-power')

    # WEP enabled?
    if conf.exists('security wep'):
        wifi['sec_wep'] = True

    # WEP encryption key(s)
    if conf.exists('security wep key'):
        wifi['sec_wep_key'] = conf.return_values('security wep key')

    # WPA enabled?
    if conf.exists('security wpa'):
        wifi['sec_wpa'] = True

    # WPA Cipher suite
    if conf.exists('security wpa cipher'):
        wifi['sec_wpa_cipher'] = conf.return_values('security wpa cipher')

    # WPA mode
    if conf.exists('security wpa mode'):
        wifi['sec_wpa_mode'] = conf.return_value('security wpa mode')

    # WPA default ciphers depend on WPA mode
    if not wifi['sec_wpa_cipher']:
        if wifi['sec_wpa_mode'] == 'wpa':
            wifi['sec_wpa_cipher'].append('TKIP')
            wifi['sec_wpa_cipher'].append('CCMP')

        elif wifi['sec_wpa_mode'] == 'wpa2':
            wifi['sec_wpa_cipher'].append('CCMP')

        elif wifi['sec_wpa_mode'] == 'both':
            wifi['sec_wpa_cipher'].append('CCMP')
            wifi['sec_wpa_cipher'].append('TKIP')

    # WPA personal shared pass phrase
    if conf.exists('security wpa passphrase'):
        wifi['sec_wpa_passphrase'] = conf.return_value('security wpa passphrase')

    # WPA RADIUS source address
    if conf.exists('security wpa radius source-address'):
        wifi['sec_wpa_radius_source'] = conf.return_value('security wpa radius source-address')

    # WPA RADIUS server
    for server in conf.list_nodes('security wpa radius server'):
        # set new configuration level
        conf.set_level(cfg_base + ' security wpa radius server ' + server)
        radius = {
            'server' : server,
            'acc_port' : '',
            'disabled': False,
            'port' : 1812,
            'key' : ''
        }

        # RADIUS server port
        if conf.exists('port'):
            radius['port'] = int(conf.return_value('port'))

        # receive RADIUS accounting info
        if conf.exists('accounting'):
            radius['acc_port'] = radius['port'] + 1

        # Check if RADIUS server was temporary disabled
        if conf.exists(['disable']):
            radius['disabled'] = True

        # RADIUS server shared-secret
        if conf.exists('key'):
            radius['key'] = conf.return_value('key')

        # append RADIUS server to list of servers
        wifi['sec_wpa_radius'].append(radius)

    # re-set configuration level to parse new nodes
    conf.set_level(cfg_base)

    # Wireless access-point service set identifier (SSID)
    if conf.exists('ssid'):
        wifi['ssid'] = conf.return_value('ssid')

    # Wireless device type for this interface
    if conf.exists('type'):
        wifi['type'] = conf.return_value('type')

    # re-set configuration level to parse new nodes
    conf.set_level(cfg_base)
    # Determine vif interfaces (currently effective) - to determine which
    # vif interface is no longer present and needs to be removed
    eff_intf = conf.list_effective_nodes('vif')
    act_intf = conf.list_nodes('vif')
    wifi['vif_remove'] = list_diff(eff_intf, act_intf)

    if conf.exists('vif'):
        for vif in conf.list_nodes('vif'):
            # set config level to vif interface
            conf.set_level(cfg_base + ' vif ' + vif)
            wifi['vif'].append(vlan_to_dict(conf))

    # disable interface
    if conf.exists('disable'):
        wifi['disable'] = True

    # retrieve configured regulatory domain
    conf.set_level('system')
    if conf.exists('wifi-regulatory-domain'):
        wifi['country_code'] = conf.return_value('wifi-regulatory-domain')

    return wifi


def verify(wifi):
    if wifi['deleted']:
        return None

    if wifi['type'] != 'monitor' and not wifi['ssid']:
        raise ConfigError('SSID must be set for {}'.format(wifi['intf']))

    if wifi['type'] == 'access-point':
        c = Config()
        if not c.exists('system wifi-regulatory-domain'):
            raise ConfigError('Wireless regulatory domain is mandatory,\n' \
                              'use "set system wifi-regulatory-domain".')

        if not wifi['channel']:
            raise ConfigError('Channel must be set for {}'.format(wifi['intf']))

    if len(wifi['sec_wep_key']) > 4:
        raise ConfigError('No more then 4 WEP keys configurable')

    if wifi['cap_vht'] and not wifi['cap_ht']:
        raise ConfigError('Specify HT flags if you want to use VHT!')

    if wifi['cap_vht_beamform'] and wifi['cap_vht_antenna_cnt'] == 1:
        raise ConfigError('Cannot use beam forming with just one antenna!')

    if wifi['sec_wep'] and (len(wifi['sec_wep_key']) == 0):
        raise ConfigError('Missing WEP keys')

    if wifi['sec_wpa'] and not (wifi['sec_wpa_passphrase'] or wifi['sec_wpa_radius']):
        raise ConfigError('Misssing WPA key or RADIUS server')

    for radius in wifi['sec_wpa_radius']:
        if not radius['key']:
            raise ConfigError('Misssing RADIUS shared secret key for server: {}'.format(radius['server']))

    vrf_name = wifi['vrf']
    if vrf_name and vrf_name not in interfaces():
        raise ConfigError(f'VRF "{vrf_name}" does not exist')

    # use common function to verify VLAN configuration
    verify_vlan_config(wifi)

    return None

def generate(wifi):
    pid = 0
    # always stop hostapd service first before reconfiguring it
    pidfile = get_pid('hostapd', wifi['intf'])
    if os.path.isfile(pidfile):
        pid = 0
        with open(pidfile, 'r') as f:
            pid = int(f.read())

    if pid_exists(pid):
        cmd  = 'start-stop-daemon --stop --quiet'
        cmd += ' --pidfile ' + pidfile
        subprocess_cmd(cmd)

    # always stop wpa_supplicant service first before reconfiguring it
    pidfile = get_pid('wpa_supplicant', wifi['intf'])
    if os.path.isfile(pidfile):
        pid = 0
        with open(pidfile, 'r') as f:
            pid = int(f.read())

    if pid_exists(pid):
        cmd  = 'start-stop-daemon --stop --quiet'
        cmd += ' --pidfile ' + pidfile
        subprocess_cmd(cmd)

    # Delete config files if interface is removed
    if wifi['deleted']:
        if os.path.isfile(get_conf_file('hostapd', wifi['intf'])):
            os.unlink(get_conf_file('hostapd', wifi['intf']))

        if os.path.isfile(get_conf_file('wpa_supplicant', wifi['intf'])):
            os.unlink(get_conf_file('wpa_supplicant', wifi['intf']))

        return None

    # render appropriate new config files depending on access-point or station mode
    if wifi['type'] == 'access-point':
        tmpl = Template(config_hostapd_tmpl)
        config_text = tmpl.render(wifi)
        with open(get_conf_file('hostapd', wifi['intf']), 'w') as f:
            f.write(config_text)

    elif wifi['type'] == 'station':
        tmpl = Template(config_wpa_suppl_tmpl)
        config_text = tmpl.render(wifi)
        with open(get_conf_file('wpa_supplicant', wifi['intf']), 'w') as f:
            f.write(config_text)

    return None

def apply(wifi):
    w = EthernetIf(wifi['intf'])
    if wifi['deleted']:
        # delete interface
        w.remove()
    else:
        # Some parts e.g. MAC address can't be changed when interface is up
        w.set_state('down')

        # update interface description used e.g. within SNMP
        w.set_alias(wifi['description'])

        # get DHCP config dictionary and update values
        opt = w.get_dhcp_options()

        if wifi['dhcp_client_id']:
            opt['client_id'] = wifi['dhcp_client_id']

        if wifi['dhcp_hostname']:
            opt['hostname'] = wifi['dhcp_hostname']

        if wifi['dhcp_vendor_class_id']:
            opt['vendor_class_id'] = wifi['dhcp_vendor_class_id']

        # store DHCP config dictionary - used later on when addresses are aquired
        w.set_dhcp_options(opt)

        # get DHCPv6 config dictionary and update values
        opt = w.get_dhcpv6_options()

        if wifi['dhcpv6_prm_only']:
            opt['dhcpv6_prm_only'] = True

        if wifi['dhcpv6_temporary']:
            opt['dhcpv6_temporary'] = True

        # store DHCPv6 config dictionary - used later on when addresses are aquired
        w.set_dhcpv6_options(opt)

        # ignore link state changes
        w.set_link_detect(wifi['disable_link_detect'])

        # assign to VRF
        if wifi['vrf']:
            w.add_vrf(wifi['vrf'])
        else:
            w.del_vrf(wifi['vrf'])

        # Change interface MAC address - re-set to real hardware address (hw-id)
        # if custom mac is removed
        if wifi['mac']:
            w.set_mac(wifi['mac'])
        else:
            w.set_mac(wifi['hw_id'])

        # configure ARP filter configuration
        w.set_arp_filter(wifi['ip_disable_arp_filter'])
        # configure ARP accept
        w.set_arp_accept(wifi['ip_enable_arp_accept'])
        # configure ARP announce
        w.set_arp_announce(wifi['ip_enable_arp_announce'])
        # configure ARP ignore
        w.set_arp_ignore(wifi['ip_enable_arp_ignore'])

        # Enable/Disable interface
        if wifi['disable']:
            w.set_state('down')
        else:
            w.set_state('up')

        # Configure interface address(es)
        # - not longer required addresses get removed first
        # - newly addresses will be added second
        for addr in wifi['address_remove']:
            w.del_addr(addr)
        for addr in wifi['address']:
            w.add_addr(addr)

        # remove no longer required VLAN interfaces (vif)
        for vif in wifi['vif_remove']:
            e.del_vlan(vif)

        # create VLAN interfaces (vif)
        for vif in wifi['vif']:
            # QoS priority mapping can only be set during interface creation
            # so we delete the interface first if required.
            if vif['egress_qos_changed'] or vif['ingress_qos_changed']:
                try:
                    # on system bootup the above condition is true but the interface
                    # does not exists, which throws an exception, but that's legal
                    e.del_vlan(vif['id'])
                except:
                    pass

            vlan = e.add_vlan(vif['id'])
            apply_vlan_config(vlan, vif)

    # Physical interface is now configured. Proceed by starting hostapd or
    # wpa_supplicant daemon. When type is monitor we can just skip this.
    if wifi['type'] == 'access-point':
        cmd  = 'start-stop-daemon --start --quiet'
        cmd += ' --exec /usr/sbin/hostapd'
        # now pass arguments to hostapd binary
        cmd += ' -- -B'
        cmd += ' -P {}'.format(get_pid('hostapd', wifi['intf']))
        cmd += ' {}'.format(get_conf_file('hostapd', wifi['intf']))

        # execute assembled command
        subprocess_cmd(cmd)

    elif wifi['type'] == 'station':
        cmd  = 'start-stop-daemon --start --quiet'
        cmd += ' --exec /sbin/wpa_supplicant'
        # now pass arguments to hostapd binary
        cmd += ' -- -s -B -D nl80211'
        cmd += ' -P {}'.format(get_pid('wpa_supplicant', wifi['intf']))
        cmd += ' -i {}'.format(wifi['intf'])
        cmd += ' -c {}'.format(get_conf_file('wpa_supplicant', wifi['intf']))

        # execute assembled command
        subprocess_cmd(cmd)

    return None

if __name__ == '__main__':
    try:
        c = get_config()
        verify(c)
        generate(c)
        apply(c)
    except ConfigError as e:
        print(e)
        exit(1)