wlanapi.cs

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
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Net.NetworkInformation;
using System.Threading;
using System.Text;
using System.Diagnostics;
 
namespace NativeWifi
{
    public static class Wlan
    {
        #region P/Invoke API
        /// <summary>
        /// Defines various opcodes used to set and query parameters for an interface.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_INTF_OPCODE</c> type.
        /// </remarks>
        public enum WlanIntfOpcode
        {
            /// <summary>
            /// Opcode used to set or query whether auto config is enabled.
            /// </summary>
            AutoconfEnabled = 1,
            /// <summary>
            /// Opcode used to set or query whether background scan is enabled.
            /// </summary>
            BackgroundScanEnabled,
            /// <summary>
            /// Opcode used to set or query the media streaming mode of the driver.
            /// </summary>
            MediaStreamingMode,
            /// <summary>
            /// Opcode used to set or query the radio state.
            /// </summary>
            RadioState,
            /// <summary>
            /// Opcode used to set or query the BSS type of the interface.
            /// </summary>
            BssType,
            /// <summary>
            /// Opcode used to query the state of the interface.
            /// </summary>
            InterfaceState,
            /// <summary>
            /// Opcode used to query information about the current connection of the interface.
            /// </summary>
            CurrentConnection,
            /// <summary>
            /// Opcose used to query the current channel on which the wireless interface is operating.
            /// </summary>
            ChannelNumber,
            /// <summary>
            /// Opcode used to query the supported auth/cipher pairs for infrastructure mode.
            /// </summary>
            SupportedInfrastructureAuthCipherPairs,
            /// <summary>
            /// Opcode used to query the supported auth/cipher pairs for ad hoc mode.
            /// </summary>
            SupportedAdhocAuthCipherPairs,
            /// <summary>
            /// Opcode used to query the list of supported country or region strings.
            /// </summary>
            SupportedCountryOrRegionStringList,
            /// <summary>
            /// Opcode used to set or query the current operation mode of the wireless interface.
            /// </summary>
            CurrentOperationMode,
            /// <summary>
            /// Opcode used to query driver statistics.
            /// </summary>
            Statistics = 0x10000101,
            /// <summary>
            /// Opcode used to query the received signal strength.
            /// </summary>
            RSSI,
            SecurityStart = 0x20010000,
            SecurityEnd = 0x2fffffff,
            IhvStart = 0x30000000,
            IhvEnd = 0x3fffffff
        }
 
        /// <summary>
        /// Specifies the origin of automatic configuration (auto config) settings.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_OPCODE_VALUE_TYPE</c> type.
        /// </remarks>
        public enum WlanOpcodeValueType
        {
            /// <summary>
            /// The auto config settings were queried, but the origin of the settings was not determined.
            /// </summary>
            QueryOnly = 0,
            /// <summary>
            /// The auto config settings were set by group policy.
            /// </summary>
            SetByGroupPolicy = 1,
            /// <summary>
            /// The auto config settings were set by the user.
            /// </summary>
            SetByUser = 2,
            /// <summary>
            /// The auto config settings are invalid.
            /// </summary>
            Invalid = 3
        }
 
        public const uint WLAN_CLIENT_VERSION_XP_SP2 = 1;
        public const uint WLAN_CLIENT_VERSION_LONGHORN = 2;
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanOpenHandle(
            [In] UInt32 clientVersion,
            [In, Out] IntPtr pReserved,
            [Out] out UInt32 negotiatedVersion,
            [Out] out IntPtr clientHandle);
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanCloseHandle(
            [In] IntPtr clientHandle,
            [In, Out] IntPtr pReserved);
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanEnumInterfaces(
            [In] IntPtr clientHandle,
            [In, Out] IntPtr pReserved,
            [Out] out IntPtr ppInterfaceList);
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanQueryInterface(
            [In] IntPtr clientHandle,
            [In, MarshalAs(UnmanagedType.LPStruct)] Guid interfaceGuid,
            [In] WlanIntfOpcode opCode,
            [In, Out] IntPtr pReserved,
            [Out] out int dataSize,
            [Out] out IntPtr ppData,
            [Out] out WlanOpcodeValueType wlanOpcodeValueType);
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanSetInterface(
            [In] IntPtr clientHandle,
            [In, MarshalAs(UnmanagedType.LPStruct)] Guid interfaceGuid,
            [In] WlanIntfOpcode opCode,
            [In] uint dataSize,
            [In] IntPtr pData,
            [In, Out] IntPtr pReserved);
 
        /// <param name="pDot11Ssid">Not supported on Windows XP SP2: must be a <c>null</c> reference.</param>
        /// <param name="pIeData">Not supported on Windows XP SP2: must be a <c>null</c> reference.</param>
        [DllImport("wlanapi.dll")]
        public static extern int WlanScan(
            [In] IntPtr clientHandle,
            [In, MarshalAs(UnmanagedType.LPStruct)] Guid interfaceGuid,
            [In] IntPtr pDot11Ssid,
            [In] IntPtr pIeData,
            [In, Out] IntPtr pReserved);
 
        /// <summary>
        /// Defines flags passed to <see cref="WlanGetAvailableNetworkList"/>.
        /// </summary>
        [Flags]
        public enum WlanGetAvailableNetworkFlags
        {
            /// <summary>
            /// Include all ad-hoc network profiles in the available network list, including profiles that are not visible.
            /// </summary>
            IncludeAllAdhocProfiles = 0x00000001,
            /// <summary>
            /// Include all hidden network profiles in the available network list, including profiles that are not visible.
            /// </summary>
            IncludeAllManualHiddenProfiles = 0x00000002
        }
 
        /// <summary>
        /// The header of an array of information about available networks.
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        internal struct WlanAvailableNetworkListHeader
        {
            /// <summary>
            /// Contains the number of <see cref=""/> items following the header.
            /// </summary>
            public uint numberOfItems;
            /// <summary>
            /// The index of the current item. The index of the first item is 0.
            /// </summary>
            public uint index;
        }
 
        /// <summary>
        /// Contains various flags for the network.
        /// </summary>
        [Flags]
        public enum WlanAvailableNetworkFlags
        {
            /// <summary>
            /// This network is currently connected.
            /// </summary>
            Connected = 0x00000001,
            /// <summary>
            /// There is a profile for this network.
            /// </summary>
            HasProfile = 0x00000002
        }
 
        /// <summary>
        /// Contains information about an available wireless network.
        /// </summary>
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        public struct WlanAvailableNetwork
        {
            /// <summary>
            /// Contains the profile name associated with the network.
            /// If the network doesn't have a profile, this member will be empty.
            /// If multiple profiles are associated with the network, there will be multiple entries with the same SSID in the visible network list. Profile names are case-sensitive.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
            public string profileName;
            /// <summary>
            /// Contains the SSID of the visible wireless network.
            /// </summary>
            public Dot11Ssid dot11Ssid;
            /// <summary>
            /// Specifies whether the network is infrastructure or ad hoc.
            /// </summary>
            public Dot11BssType dot11BssType;
            /// <summary>
            /// Indicates the number of BSSIDs in the network.
            /// </summary>
            public uint numberOfBssids;
            /// <summary>
            /// Indicates whether the network is connectable or not.
            /// </summary>
            public bool networkConnectable;
            /// <summary>
            /// Indicates why a network cannot be connected to. This member is only valid when <see cref="networkConnectable"/> is <c>false</c>.
            /// </summary>
            public WlanReasonCode wlanNotConnectableReason;
            /// <summary>
            /// The number of PHY types supported on available networks.
            /// The maximum value of this field is 8. If more than 8 PHY types are supported, <see cref="morePhyTypes"/> must be set to <c>true</c>.
            /// </summary>
            private uint numberOfPhyTypes;
            /// <summary>
            /// Contains an array of <see cref="Dot11PhyType"/> values that represent the PHY types supported by the available networks.
            /// When <see cref="numberOfPhyTypes"/> is greater than 8, this array contains only the first 8 PHY types.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
            private Dot11PhyType[] dot11PhyTypes;
            /// <summary>
            /// Gets the <see cref="Dot11PhyType"/> values that represent the PHY types supported by the available networks.
            /// </summary>
            public Dot11PhyType[] Dot11PhyTypes
            {
                get
                {
                    Dot11PhyType[] ret = new Dot11PhyType[numberOfPhyTypes];
                    Array.Copy(dot11PhyTypes, ret, numberOfPhyTypes);
                    return ret;
                }
            }
            /// <summary>
            /// Specifies if there are more than 8 PHY types supported.
            /// When this member is set to <c>true</c>, an application must call <see cref="WlanClient.WlanInterface.GetNetworkBssList"/> to get the complete list of PHY types.
            /// <see cref="WlanBssEntry.phyId"/> contains the PHY type for an entry.
            /// </summary>
            public bool morePhyTypes;
            /// <summary>
            /// A percentage value that represents the signal quality of the network.
            /// This field contains a value between 0 and 100.
            /// A value of 0 implies an actual RSSI signal strength of -100 dbm.
            /// A value of 100 implies an actual RSSI signal strength of -50 dbm.
            /// You can calculate the RSSI signal strength value for values between 1 and 99 using linear interpolation.
            /// </summary>
            public uint wlanSignalQuality;
            /// <summary>
            /// Indicates whether security is enabled on the network.
            /// </summary>
            public bool securityEnabled;
            /// <summary>
            /// Indicates the default authentication algorithm used to join this network for the first time.
            /// </summary>
            public Dot11AuthAlgorithm dot11DefaultAuthAlgorithm;
            /// <summary>
            /// Indicates the default cipher algorithm to be used when joining this network.
            /// </summary>
            public Dot11CipherAlgorithm dot11DefaultCipherAlgorithm;
            /// <summary>
            /// Contains various flags for the network.
            /// </summary>
            public WlanAvailableNetworkFlags flags;
            /// <summary>
            /// Reserved for future use. Must be set to NULL.
            /// </summary>
            uint reserved;
        }
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanGetAvailableNetworkList(
            [In] IntPtr clientHandle,
            [In, MarshalAs(UnmanagedType.LPStruct)] Guid interfaceGuid,
            [In] WlanGetAvailableNetworkFlags flags,
            [In, Out] IntPtr reservedPtr,
            [Out] out IntPtr availableNetworkListPtr);
 
        [Flags]
        public enum WlanProfileFlags
        {
            /// <remarks>
            /// The only option available on Windows XP SP2.
            /// </remarks>
            AllUser = 0,
            GroupPolicy = 1,
            User = 2
        }
 
 
        [DllImport("wlanapi.dll")]
        public static extern void WlanFreeMemory(IntPtr pMemory);
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanReasonCodeToString(
            [In] WlanReasonCode reasonCode,
            [In] int bufferSize,
            [In, Out] StringBuilder stringBuffer,
            IntPtr pReserved
        );
 
        /// <summary>
        /// Specifies where the notification comes from.
        /// </summary>
        [Flags]
        public enum WlanNotificationSource
        {
            None = 0,
            /// <summary>
            /// All notifications, including those generated by the 802.1X module.
            /// </summary>
            All = 0X0000FFFF,
            /// <summary>
            /// Notifications generated by the auto configuration module.
            /// </summary>
            ACM = 0X00000008,
            /// <summary>
            /// Notifications generated by MSM.
            /// </summary>
            MSM = 0X00000010,
            /// <summary>
            /// Notifications generated by the security module.
            /// </summary>
            Security = 0X00000020,
            /// <summary>
            /// Notifications generated by independent hardware vendors (IHV).
            /// </summary>
            IHV = 0X00000040
        }
 
        /// <summary>
        /// Indicates the type of an ACM (<see cref="WlanNotificationSource.ACM"/>) notification.
        /// </summary>
        /// <remarks>
        /// The enumeration identifiers correspond to the native <c>wlan_notification_acm_</c> identifiers.
        /// On Windows XP SP2, only the <c>ConnectionComplete</c> and <c>Disconnected</c> notifications are available.
        /// </remarks>
        public enum WlanNotificationCodeAcm
        {
            AutoconfEnabled = 1,
            AutoconfDisabled,
            BackgroundScanEnabled,
            BackgroundScanDisabled,
            BssTypeChange,
            PowerSettingChange,
            ScanComplete,
            ScanFail,
            ConnectionStart,
            ConnectionComplete,
            ConnectionAttemptFail,
            FilterListChange,
            InterfaceArrival,
            InterfaceRemoval,
            ProfileChange,
            ProfileNameChange,
            ProfilesExhausted,
            NetworkNotAvailable,
            NetworkAvailable,
            Disconnecting,
            Disconnected,
            AdhocNetworkStateChange
        }
 
        /// <summary>
        /// Indicates the type of an MSM (<see cref="WlanNotificationSource.MSM"/>) notification.
        /// </summary>
        /// <remarks>
        /// The enumeration identifiers correspond to the native <c>wlan_notification_msm_</c> identifiers.
        /// </remarks>
        public enum WlanNotificationCodeMsm
        {
            Associating = 1,
            Associated,
            Authenticating,
            Connected,
            RoamingStart,
            RoamingEnd,
            RadioStateChange,
            SignalQualityChange,
            Disassociating,
            Disconnected,
            PeerJoin,
            PeerLeave,
            AdapterRemoval,
            AdapterOperationModeChange
        }
 
        /// <summary>
        /// Contains information provided when registering for notifications.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_NOTIFICATION_DATA</c> type.
        /// </remarks>
        [StructLayout(LayoutKind.Sequential)]
        public struct WlanNotificationData
        {
            /// <summary>
            /// Specifies where the notification comes from.
            /// </summary>
            /// <remarks>
            /// On Windows XP SP2, this field must be set to <see cref="WlanNotificationSource.None"/>, <see cref="WlanNotificationSource.All"/> or <see cref="WlanNotificationSource.ACM"/>.
            /// </remarks>
            public WlanNotificationSource notificationSource;
            /// <summary>
            /// Indicates the type of notification. The value of this field indicates what type of associated data will be present in <see cref="dataPtr"/>.
            /// </summary>
            public int notificationCode;
            /// <summary>
            /// Indicates which interface the notification is for.
            /// </summary>
            public Guid interfaceGuid;
            /// <summary>
            /// Specifies the size of <see cref="dataPtr"/>, in bytes.
            /// </summary>
            public int dataSize;
            /// <summary>
            /// Pointer to additional data needed for the notification, as indicated by <see cref="notificationCode"/>.
            /// </summary>
            public IntPtr dataPtr;
 
            /// <summary>
            /// Gets the notification code (in the correct enumeration type) according to the notification source.
            /// </summary>
            public object NotificationCode
            {
                get
                {
                    if (notificationSource == WlanNotificationSource.MSM)
                        return (WlanNotificationCodeMsm)notificationCode;
                    else if (notificationSource == WlanNotificationSource.ACM)
                        return (WlanNotificationCodeAcm)notificationCode;
                    else
                        return notificationCode;
                }
 
            }
        }
 
        /// <summary>
        /// Defines the callback function which accepts WLAN notifications.
        /// </summary>
        public delegate void WlanNotificationCallbackDelegate(ref WlanNotificationData notificationData, IntPtr context);
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanRegisterNotification(
            [In] IntPtr clientHandle,
            [In] WlanNotificationSource notifSource,
            [In] bool ignoreDuplicate,
            [In] WlanNotificationCallbackDelegate funcCallback,
            [In] IntPtr callbackContext,
            [In] IntPtr reserved,
            [Out] out WlanNotificationSource prevNotifSource);
 
        /// <summary>
        /// Defines connection parameter flags.
        /// </summary>
        [Flags]
        public enum WlanConnectionFlags
        {
            /// <summary>
            /// Connect to the destination network even if the destination is a hidden network. A hidden network does not broadcast its SSID. Do not use this flag if the destination network is an ad-hoc network.
            /// <para>If the profile specified by <see cref="WlanConnectionParameters.profile"/> is not <c>null</c>, then this flag is ignored and the nonBroadcast profile element determines whether to connect to a hidden network.</para>
            /// </summary>
            HiddenNetwork = 0x00000001,
            /// <summary>
            /// Do not form an ad-hoc network. Only join an ad-hoc network if the network already exists. Do not use this flag if the destination network is an infrastructure network.
            /// </summary>
            AdhocJoinOnly = 0x00000002,
            /// <summary>
            /// Ignore the privacy bit when connecting to the network. Ignoring the privacy bit has the effect of ignoring whether packets are encryption and ignoring the method of encryption used. Only use this flag when connecting to an infrastructure network using a temporary profile.
            /// </summary>
            IgnorePrivacyBit = 0x00000004,
            /// <summary>
            /// Exempt EAPOL traffic from encryption and decryption. This flag is used when an application must send EAPOL traffic over an infrastructure network that uses Open authentication and WEP encryption. This flag must not be used to connect to networks that require 802.1X authentication. This flag is only valid when <see cref="WlanConnectionParameters.wlanConnectionMode"/> is set to <see cref="WlanConnectionMode.TemporaryProfile"/>. Avoid using this flag whenever possible.
            /// </summary>
            EapolPassthrough = 0x00000008
        }
 
        /// <summary>
        /// Specifies the parameters used when using the <see cref="WlanConnect"/> function.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_CONNECTION_PARAMETERS</c> type.
        /// </remarks>
        [StructLayout(LayoutKind.Sequential)]
        public struct WlanConnectionParameters
        {
            /// <summary>
            /// Specifies the mode of connection.
            /// </summary>
            public WlanConnectionMode wlanConnectionMode;
            /// <summary>
            /// Specifies the profile being used for the connection.
            /// The contents of the field depend on the <see cref="wlanConnectionMode"/>:
            /// <list type="table">
            /// <listheader>
            /// <term>Value of <see cref="wlanConnectionMode"/></term>
            /// <description>Contents of the profile string</description>
            /// </listheader>
            /// <item>
            /// <term><see cref="WlanConnectionMode.Profile"/></term>
            /// <description>The name of the profile used for the connection.</description>
            /// </item>
            /// <item>
            /// <term><see cref="WlanConnectionMode.TemporaryProfile"/></term>
            /// <description>The XML representation of the profile used for the connection.</description>
            /// </item>
            /// <item>
            /// <term><see cref="WlanConnectionMode.DiscoverySecure"/>, <see cref="WlanConnectionMode.DiscoveryUnsecure"/> or <see cref="WlanConnectionMode.Auto"/></term>
            /// <description><c>null</c></description>
            /// </item>
            /// </list>
            /// </summary>
            [MarshalAs(UnmanagedType.LPWStr)]
            public string profile;
            /// <summary>
            /// Pointer to a <see cref="Dot11Ssid"/> structure that specifies the SSID of the network to connect to.
            /// This field is optional. When set to <c>null</c>, all SSIDs in the profile will be tried.
            /// This field must not be <c>null</c> if <see cref="wlanConnectionMode"/> is set to <see cref="WlanConnectionMode.DiscoverySecure"/> or <see cref="WlanConnectionMode.DiscoveryUnsecure"/>.
            /// </summary>
            public IntPtr dot11SsidPtr;
            /// <summary>
            /// Pointer to a <see cref="Dot11BssidList"/> structure that contains the list of basic service set (BSS) identifiers desired for the connection.
            /// </summary>
            /// <remarks>
            /// On Windows XP SP2, must be set to <c>null</c>.
            /// </remarks>
            public IntPtr desiredBssidListPtr;
            /// <summary>
            /// A <see cref="Dot11BssType"/> value that indicates the BSS type of the network. If a profile is provided, this BSS type must be the same as the one in the profile.
            /// </summary>
            public Dot11BssType dot11BssType;
            /// <summary>
            /// Specifies ocnnection parameters.
            /// </summary>
            /// <remarks>
            /// On Windows XP SP2, must be set to 0.
            /// </remarks>
            public WlanConnectionFlags flags;
        }
 
        /// <summary>
        /// The connection state of an ad hoc network.
        /// </summary>
        public enum WlanAdhocNetworkState
        {
            /// <summary>
            /// The ad hoc network has been formed, but no client or host is connected to the network.
            /// </summary>
            Formed = 0,
            /// <summary>
            /// A client or host is connected to the ad hoc network.
            /// </summary>
            Connected = 1
        }
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanConnect(
            [In] IntPtr clientHandle,
            [In, MarshalAs(UnmanagedType.LPStruct)] Guid interfaceGuid,
            [In] ref WlanConnectionParameters connectionParameters,
            IntPtr pReserved);
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanDeleteProfile(
            [In] IntPtr clientHandle,
            [In, MarshalAs(UnmanagedType.LPStruct)] Guid interfaceGuid,
            [In, MarshalAs(UnmanagedType.LPWStr)] string profileName,
            IntPtr reservedPtr
        );
 
        [DllImport("wlanapi.dll")]
        public static extern int WlanGetNetworkBssList(
            [In] IntPtr clientHandle,
            [In, MarshalAs(UnmanagedType.LPStruct)] Guid interfaceGuid,
            [In] IntPtr dot11SsidInt,
            [In] Dot11BssType dot11BssType,
            [In] bool securityEnabled,
            IntPtr reservedPtr,
            [Out] out IntPtr wlanBssList
        );
 
        [StructLayout(LayoutKind.Sequential)]
        internal struct WlanBssListHeader
        {
            internal uint totalSize;
            internal uint numberOfItems;
        }
 
        /// <summary>
        /// Contains information about a basic service set (BSS).
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        public struct WlanBssEntry
        {
            /// <summary>
            /// Contains the SSID of the access point (AP) associated with the BSS.
            /// </summary>
            public Dot11Ssid dot11Ssid;
            /// <summary>
            /// The identifier of the PHY on which the AP is operating.
            /// </summary>
            public uint phyId;
            /// <summary>
            /// Contains the BSS identifier.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
            public byte[] dot11Bssid;
            /// <summary>
            /// Specifies whether the network is infrastructure or ad hoc.
            /// </summary>
            public Dot11BssType dot11BssType;
            public Dot11PhyType dot11BssPhyType;
            /// <summary>
            /// The received signal strength in dBm.
            /// </summary>
            public int rssi;
            /// <summary>
            /// The link quality reported by the driver. Ranges from 0-100.
            /// </summary>
            public uint linkQuality;
            /// <summary>
            /// If 802.11d is not implemented, the network interface card (NIC) must set this field to TRUE. If 802.11d is implemented (but not necessarily enabled), the NIC must set this field to TRUE if the BSS operation complies with the configured regulatory domain.
            /// </summary>
            public bool inRegDomain;
            /// <summary>
            /// Contains the beacon interval value from the beacon packet or probe response.
            /// </summary>
            public ushort beaconPeriod;
            /// <summary>
            /// The timestamp from the beacon packet or probe response.
            /// </summary>
            public ulong timestamp;
            /// <summary>
            /// The host timestamp value when the beacon or probe response is received.
            /// </summary>
            public ulong hostTimestamp;
            /// <summary>
            /// The capability value from the beacon packet or probe response.
            /// </summary>
            public ushort capabilityInformation;
            /// <summary>
            /// The frequency of the center channel, in kHz.
            /// </summary>
            public uint chCenterFrequency;
            /// <summary>
            /// Contains the set of data transfer rates supported by the BSS.
            /// </summary>
            public WlanRateSet wlanRateSet;
            /// <summary>
            /// Offset of the information element (IE) data blob.
            /// </summary>
            public uint ieOffset;
            /// <summary>
            /// Size of the IE data blob, in bytes.
            /// </summary>
            public uint ieSize;
        }
 
        /// <summary>
        /// Contains the set of supported data rates.
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        public struct WlanRateSet
        {
            /// <summary>
            /// The length, in bytes, of <see cref="rateSet"/>.
            /// </summary>
            private uint rateSetLength;
            /// <summary>
            /// An array of supported data transfer rates.
            /// If the rate is a basic rate, the first bit of the rate value is set to 1.
            /// A basic rate is the data transfer rate that all stations in a basic service set (BSS) can use to receive frames from the wireless medium.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 126)]
            private ushort[] rateSet;
 
            public ushort[] Rates
            {
                get
                {
                    ushort[] rates = new ushort[rateSetLength / sizeof(ushort)];
                    Array.Copy(rateSet, rates, rates.Length);
                    return rates;
                }
            }
 
            /// <summary>
            /// CalculateS the data transfer rate in Mbps for an arbitrary supported rate.
            /// </summary>
            /// <param name="rate"></param>
            /// <returns></returns>
            public double GetRateInMbps(int rate)
            {
                return (rateSet[rate] & 0x7FFF) * 0.5;
            }
        }
 
        /// <summary>
        /// Represents an error occuring during WLAN operations which indicate their failure via a <see cref="WlanReasonCode"/>.
        /// </summary>
        public class WlanException : Exception
        {
            private WlanReasonCode reasonCode;
 
            WlanException(WlanReasonCode reasonCode)
            {
                this.reasonCode = reasonCode;
            }
 
            /// <summary>
            /// Gets the WLAN reason code.
            /// </summary>
            /// <value>The WLAN reason code.</value>
            public WlanReasonCode ReasonCode
            {
                get { return reasonCode; }
            }
 
            /// <summary>
            /// Gets a message that describes the reason code.
            /// </summary>
            /// <value></value>
            /// <returns>The error message that explains the reason for the exception, or an empty string("").</returns>
            public override string Message
            {
                get
                {
                    StringBuilder sb = new StringBuilder(1024);
                    if (WlanReasonCodeToString(reasonCode, sb.Capacity, sb, IntPtr.Zero) == 0)
                        return sb.ToString();
                    else
                        return string.Empty;
                }
            }
        }
 
        // TODO: .NET-ify the WlanReasonCode enum (naming convention + docs).
 
        /// <summary>
        /// Specifies reasons for a failure of a WLAN operation.
        /// </summary>
        /// <remarks>
        /// To get the WLAN API native reason code identifiers, prefix the identifiers with <c>WLAN_REASON_CODE_</c>.
        /// </remarks>
        public enum WlanReasonCode
        {
            Success = 0,
            // general codes
            UNKNOWN = 0x10000 + 1,
 
            RANGE_SIZE = 0x10000,
            BASE = 0x10000 + RANGE_SIZE,
 
            // range for Auto Config
            //
            AC_BASE = 0x10000 + RANGE_SIZE,
            AC_CONNECT_BASE = (AC_BASE + RANGE_SIZE / 2),
            AC_END = (AC_BASE + RANGE_SIZE - 1),
 
            // range for profile manager
            // it has profile adding failure reason codes, but may not have
            // connection reason codes
            //
            PROFILE_BASE = 0x10000 + (7 * RANGE_SIZE),
            PROFILE_CONNECT_BASE = (PROFILE_BASE + RANGE_SIZE / 2),
            PROFILE_END = (PROFILE_BASE + RANGE_SIZE - 1),
 
            // range for MSM
            //
            MSM_BASE = 0x10000 + (2 * RANGE_SIZE),
            MSM_CONNECT_BASE = (MSM_BASE + RANGE_SIZE / 2),
            MSM_END = (MSM_BASE + RANGE_SIZE - 1),
 
            // range for MSMSEC
            //
            MSMSEC_BASE = 0x10000 + (3 * RANGE_SIZE),
            MSMSEC_CONNECT_BASE = (MSMSEC_BASE + RANGE_SIZE / 2),
            MSMSEC_END = (MSMSEC_BASE + RANGE_SIZE - 1),
 
            // AC network incompatible reason codes
            //
            NETWORK_NOT_COMPATIBLE = (AC_BASE + 1),
            PROFILE_NOT_COMPATIBLE = (AC_BASE + 2),
 
            // AC connect reason code
            //
            NO_AUTO_CONNECTION = (AC_CONNECT_BASE + 1),
            NOT_VISIBLE = (AC_CONNECT_BASE + 2),
            GP_DENIED = (AC_CONNECT_BASE + 3),
            USER_DENIED = (AC_CONNECT_BASE + 4),
            BSS_TYPE_NOT_ALLOWED = (AC_CONNECT_BASE + 5),
            IN_FAILED_LIST = (AC_CONNECT_BASE + 6),
            IN_BLOCKED_LIST = (AC_CONNECT_BASE + 7),
            SSID_LIST_TOO_LONG = (AC_CONNECT_BASE + 8),
            CONNECT_CALL_FAIL = (AC_CONNECT_BASE + 9),
            SCAN_CALL_FAIL = (AC_CONNECT_BASE + 10),
            NETWORK_NOT_AVAILABLE = (AC_CONNECT_BASE + 11),
            PROFILE_CHANGED_OR_DELETED = (AC_CONNECT_BASE + 12),
            KEY_MISMATCH = (AC_CONNECT_BASE + 13),
            USER_NOT_RESPOND = (AC_CONNECT_BASE + 14),
 
            // Profile validation errors
            //
            INVALID_PROFILE_SCHEMA = (PROFILE_BASE + 1),
            PROFILE_MISSING = (PROFILE_BASE + 2),
            INVALID_PROFILE_NAME = (PROFILE_BASE + 3),
            INVALID_PROFILE_TYPE = (PROFILE_BASE + 4),
            INVALID_PHY_TYPE = (PROFILE_BASE + 5),
            MSM_SECURITY_MISSING = (PROFILE_BASE + 6),
            IHV_SECURITY_NOT_SUPPORTED = (PROFILE_BASE + 7),
            IHV_OUI_MISMATCH = (PROFILE_BASE + 8),
            // IHV OUI not present but there is IHV settings in profile
            IHV_OUI_MISSING = (PROFILE_BASE + 9),
            // IHV OUI is present but there is no IHV settings in profile
            IHV_SETTINGS_MISSING = (PROFILE_BASE + 10),
            // both/conflict MSMSec and IHV security settings exist in profile
            CONFLICT_SECURITY = (PROFILE_BASE + 11),
            // no IHV or MSMSec security settings in profile
            SECURITY_MISSING = (PROFILE_BASE + 12),
            INVALID_BSS_TYPE = (PROFILE_BASE + 13),
            INVALID_ADHOC_CONNECTION_MODE = (PROFILE_BASE + 14),
            NON_BROADCAST_SET_FOR_ADHOC = (PROFILE_BASE + 15),
            AUTO_SWITCH_SET_FOR_ADHOC = (PROFILE_BASE + 16),
            AUTO_SWITCH_SET_FOR_MANUAL_CONNECTION = (PROFILE_BASE + 17),
            IHV_SECURITY_ONEX_MISSING = (PROFILE_BASE + 18),
            PROFILE_SSID_INVALID = (PROFILE_BASE + 19),
            TOO_MANY_SSID = (PROFILE_BASE + 20),
 
            // MSM network incompatible reasons
            //
            UNSUPPORTED_SECURITY_SET_BY_OS = (MSM_BASE + 1),
            UNSUPPORTED_SECURITY_SET = (MSM_BASE + 2),
            BSS_TYPE_UNMATCH = (MSM_BASE + 3),
            PHY_TYPE_UNMATCH = (MSM_BASE + 4),
            DATARATE_UNMATCH = (MSM_BASE + 5),
 
            // MSM connection failure reasons, to be defined
            // failure reason codes
            //
            // user called to disconnect
            USER_CANCELLED = (MSM_CONNECT_BASE + 1),
            // got disconnect while associating
            ASSOCIATION_FAILURE = (MSM_CONNECT_BASE + 2),
            // timeout for association
            ASSOCIATION_TIMEOUT = (MSM_CONNECT_BASE + 3),
            // pre-association security completed with failure
            PRE_SECURITY_FAILURE = (MSM_CONNECT_BASE + 4),
            // fail to start post-association security
            START_SECURITY_FAILURE = (MSM_CONNECT_BASE + 5),
            // post-association security completed with failure
            SECURITY_FAILURE = (MSM_CONNECT_BASE + 6),
            // security watchdog timeout
            SECURITY_TIMEOUT = (MSM_CONNECT_BASE + 7),
            // got disconnect from driver when roaming
            ROAMING_FAILURE = (MSM_CONNECT_BASE + 8),
            // failed to start security for roaming
            ROAMING_SECURITY_FAILURE = (MSM_CONNECT_BASE + 9),
            // failed to start security for adhoc-join
            ADHOC_SECURITY_FAILURE = (MSM_CONNECT_BASE + 10),
            // got disconnection from driver
            DRIVER_DISCONNECTED = (MSM_CONNECT_BASE + 11),
            // driver operation failed
            DRIVER_OPERATION_FAILURE = (MSM_CONNECT_BASE + 12),
            // Ihv service is not available
            IHV_NOT_AVAILABLE = (MSM_CONNECT_BASE + 13),
            // Response from ihv timed out
            IHV_NOT_RESPONDING = (MSM_CONNECT_BASE + 14),
            // Timed out waiting for driver to disconnect
            DISCONNECT_TIMEOUT = (MSM_CONNECT_BASE + 15),
            // An internal error prevented the operation from being completed.
            INTERNAL_FAILURE = (MSM_CONNECT_BASE + 16),
            // UI Request timed out.
            UI_REQUEST_TIMEOUT = (MSM_CONNECT_BASE + 17),
            // Roaming too often, post security is not completed after 5 times.
            TOO_MANY_SECURITY_ATTEMPTS = (MSM_CONNECT_BASE + 18),
 
            // MSMSEC reason codes
            //
 
            MSMSEC_MIN = MSMSEC_BASE,
 
            // Key index specified is not valid
            MSMSEC_PROFILE_INVALID_KEY_INDEX = (MSMSEC_BASE + 1),
            // Key required, PSK present
            MSMSEC_PROFILE_PSK_PRESENT = (MSMSEC_BASE + 2),
            // Invalid key length
            MSMSEC_PROFILE_KEY_LENGTH = (MSMSEC_BASE + 3),
            // Invalid PSK length
            MSMSEC_PROFILE_PSK_LENGTH = (MSMSEC_BASE + 4),
            // No auth/cipher specified
            MSMSEC_PROFILE_NO_AUTH_CIPHER_SPECIFIED = (MSMSEC_BASE + 5),
            // Too many auth/cipher specified
            MSMSEC_PROFILE_TOO_MANY_AUTH_CIPHER_SPECIFIED = (MSMSEC_BASE + 6),
            // Profile contains duplicate auth/cipher
            MSMSEC_PROFILE_DUPLICATE_AUTH_CIPHER = (MSMSEC_BASE + 7),
            // Profile raw data is invalid (1x or key data)
            MSMSEC_PROFILE_RAWDATA_INVALID = (MSMSEC_BASE + 8),
            // Invalid auth/cipher combination
            MSMSEC_PROFILE_INVALID_AUTH_CIPHER = (MSMSEC_BASE + 9),
            // 802.1x disabled when it's required to be enabled
            MSMSEC_PROFILE_ONEX_DISABLED = (MSMSEC_BASE + 10),
            // 802.1x enabled when it's required to be disabled
            MSMSEC_PROFILE_ONEX_ENABLED = (MSMSEC_BASE + 11),
            MSMSEC_PROFILE_INVALID_PMKCACHE_MODE = (MSMSEC_BASE + 12),
            MSMSEC_PROFILE_INVALID_PMKCACHE_SIZE = (MSMSEC_BASE + 13),
            MSMSEC_PROFILE_INVALID_PMKCACHE_TTL = (MSMSEC_BASE + 14),
            MSMSEC_PROFILE_INVALID_PREAUTH_MODE = (MSMSEC_BASE + 15),
            MSMSEC_PROFILE_INVALID_PREAUTH_THROTTLE = (MSMSEC_BASE + 16),
            // PreAuth enabled when PMK cache is disabled
            MSMSEC_PROFILE_PREAUTH_ONLY_ENABLED = (MSMSEC_BASE + 17),
            // Capability matching failed at network
            MSMSEC_CAPABILITY_NETWORK = (MSMSEC_BASE + 18),
            // Capability matching failed at NIC
            MSMSEC_CAPABILITY_NIC = (MSMSEC_BASE + 19),
            // Capability matching failed at profile
            MSMSEC_CAPABILITY_PROFILE = (MSMSEC_BASE + 20),
            // Network does not support specified discovery type
            MSMSEC_CAPABILITY_DISCOVERY = (MSMSEC_BASE + 21),
            // Passphrase contains invalid character
            MSMSEC_PROFILE_PASSPHRASE_CHAR = (MSMSEC_BASE + 22),
            // Key material contains invalid character
            MSMSEC_PROFILE_KEYMATERIAL_CHAR = (MSMSEC_BASE + 23),
            // Wrong key type specified for the auth/cipher pair
            MSMSEC_PROFILE_WRONG_KEYTYPE = (MSMSEC_BASE + 24),
            // "Mixed cell" suspected (AP not beaconing privacy, we have privacy enabled profile)
            MSMSEC_MIXED_CELL = (MSMSEC_BASE + 25),
            // Auth timers or number of timeouts in profile is incorrect
            MSMSEC_PROFILE_AUTH_TIMERS_INVALID = (MSMSEC_BASE + 26),
            // Group key update interval in profile is incorrect
            MSMSEC_PROFILE_INVALID_GKEY_INTV = (MSMSEC_BASE + 27),
            // "Transition network" suspected, trying legacy 802.11 security
            MSMSEC_TRANSITION_NETWORK = (MSMSEC_BASE + 28),
            // Key contains characters which do not map to ASCII
            MSMSEC_PROFILE_KEY_UNMAPPED_CHAR = (MSMSEC_BASE + 29),
            // Capability matching failed at profile (auth not found)
            MSMSEC_CAPABILITY_PROFILE_AUTH = (MSMSEC_BASE + 30),
            // Capability matching failed at profile (cipher not found)
            MSMSEC_CAPABILITY_PROFILE_CIPHER = (MSMSEC_BASE + 31),
 
            // Failed to queue UI request
            MSMSEC_UI_REQUEST_FAILURE = (MSMSEC_CONNECT_BASE + 1),
            // 802.1x authentication did not start within configured time
            MSMSEC_AUTH_START_TIMEOUT = (MSMSEC_CONNECT_BASE + 2),
            // 802.1x authentication did not complete within configured time
            MSMSEC_AUTH_SUCCESS_TIMEOUT = (MSMSEC_CONNECT_BASE + 3),
            // Dynamic key exchange did not start within configured time
            MSMSEC_KEY_START_TIMEOUT = (MSMSEC_CONNECT_BASE + 4),
            // Dynamic key exchange did not succeed within configured time
            MSMSEC_KEY_SUCCESS_TIMEOUT = (MSMSEC_CONNECT_BASE + 5),
            // Message 3 of 4 way handshake has no key data (RSN/WPA)
            MSMSEC_M3_MISSING_KEY_DATA = (MSMSEC_CONNECT_BASE + 6),
            // Message 3 of 4 way handshake has no IE (RSN/WPA)
            MSMSEC_M3_MISSING_IE = (MSMSEC_CONNECT_BASE + 7),
            // Message 3 of 4 way handshake has no Group Key (RSN)
            MSMSEC_M3_MISSING_GRP_KEY = (MSMSEC_CONNECT_BASE + 8),
            // Matching security capabilities of IE in M3 failed (RSN/WPA)
            MSMSEC_PR_IE_MATCHING = (MSMSEC_CONNECT_BASE + 9),
            // Matching security capabilities of Secondary IE in M3 failed (RSN)
            MSMSEC_SEC_IE_MATCHING = (MSMSEC_CONNECT_BASE + 10),
            // Required a pairwise key but AP configured only group keys
            MSMSEC_NO_PAIRWISE_KEY = (MSMSEC_CONNECT_BASE + 11),
            // Message 1 of group key handshake has no key data (RSN/WPA)
            MSMSEC_G1_MISSING_KEY_DATA = (MSMSEC_CONNECT_BASE + 12),
            // Message 1 of group key handshake has no group key
            MSMSEC_G1_MISSING_GRP_KEY = (MSMSEC_CONNECT_BASE + 13),
            // AP reset secure bit after connection was secured
            MSMSEC_PEER_INDICATED_INSECURE = (MSMSEC_CONNECT_BASE + 14),
            // 802.1x indicated there is no authenticator but profile requires 802.1x
            MSMSEC_NO_AUTHENTICATOR = (MSMSEC_CONNECT_BASE + 15),
            // Plumbing settings to NIC failed
            MSMSEC_NIC_FAILURE = (MSMSEC_CONNECT_BASE + 16),
            // Operation was cancelled by caller
            MSMSEC_CANCELLED = (MSMSEC_CONNECT_BASE + 17),
            // Key was in incorrect format
            MSMSEC_KEY_FORMAT = (MSMSEC_CONNECT_BASE + 18),
            // Security downgrade detected
            MSMSEC_DOWNGRADE_DETECTED = (MSMSEC_CONNECT_BASE + 19),
            // PSK mismatch suspected
            MSMSEC_PSK_MISMATCH_SUSPECTED = (MSMSEC_CONNECT_BASE + 20),
            // Forced failure because connection method was not secure
            MSMSEC_FORCED_FAILURE = (MSMSEC_CONNECT_BASE + 21),
            // ui request couldn't be queued or user pressed cancel
            MSMSEC_SECURITY_UI_FAILURE = (MSMSEC_CONNECT_BASE + 22),
 
            MSMSEC_MAX = MSMSEC_END
        }
 
        /// <summary>
        /// Contains information about connection related notifications.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_CONNECTION_NOTIFICATION_DATA</c> type.
        /// </remarks>
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        public struct WlanConnectionNotificationData
        {
            /// <remarks>
            /// On Windows XP SP 2, only <see cref="WlanConnectionMode.Profile"/> is supported.
            /// </remarks>
            public WlanConnectionMode wlanConnectionMode;
            /// <summary>
            /// The name of the profile used for the connection. Profile names are case-sensitive.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public string profileName;
            /// <summary>
            /// The SSID of the association.
            /// </summary>
            public Dot11Ssid dot11Ssid;
            /// <summary>
            /// The BSS network type.
            /// </summary>
            public Dot11BssType dot11BssType;
            /// <summary>
            /// Indicates whether security is enabled for this connection.
            /// </summary>
            public bool securityEnabled;
            /// <summary>
            /// Indicates the reason for an operation failure.
            /// This field has a value of <see cref="WlanReasonCode.Success"/> for all connection-related notifications except <see cref="WlanNotificationCodeAcm.ConnectionComplete"/>.
            /// If the connection fails, this field indicates the reason for the failure.
            /// </summary>
            public WlanReasonCode wlanReasonCode;
            /// <summary>
            /// This field contains the XML presentation of the profile used for discovery, if the connection succeeds.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 1)]
            public string profileXml;
        }
 
        /// <summary>
        /// Indicates the state of an interface.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_INTERFACE_STATE</c> type.
        /// </remarks>
        public enum WlanInterfaceState
        {
            /// <summary>
            /// The interface is not ready to operate.
            /// </summary>
            NotReady = 0,
            /// <summary>
            /// The interface is connected to a network.
            /// </summary>
            Connected = 1,
            /// <summary>
            /// The interface is the first node in an ad hoc network. No peer has connected.
            /// </summary>
            AdHocNetworkFormed = 2,
            /// <summary>
            /// The interface is disconnecting from the current network.
            /// </summary>
            Disconnecting = 3,
            /// <summary>
            /// The interface is not connected to any network.
            /// </summary>
            Disconnected = 4,
            /// <summary>
            /// The interface is attempting to associate with a network.
            /// </summary>
            Associating = 5,
            /// <summary>
            /// Auto configuration is discovering the settings for the network.
            /// </summary>
            Discovering = 6,
            /// <summary>
            /// The interface is in the process of authenticating.
            /// </summary>
            Authenticating = 7
        }
 
        /// <summary>
        /// Contains the SSID of an interface.
        /// </summary>
        public struct Dot11Ssid
        {
            /// <summary>
            /// The length, in bytes, of the <see cref="SSID"/> array.
            /// </summary>
            public uint SSIDLength;
            /// <summary>
            /// The SSID.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
            public byte[] SSID;
        }
 
        /// <summary>
        /// Defines an 802.11 PHY and media type.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>DOT11_PHY_TYPE</c> type.
        /// </remarks>
        public enum Dot11PhyType : uint
        {
            /// <summary>
            /// Specifies an unknown or uninitialized PHY type.
            /// </summary>
            Unknown = 0,
            /// <summary>
            /// Specifies any PHY type.
            /// </summary>
            Any = Unknown,
            /// <summary>
            /// Specifies a frequency-hopping spread-spectrum (FHSS) PHY. Bluetooth devices can use FHSS or an adaptation of FHSS.
            /// </summary>
            FHSS = 1,
            /// <summary>
            /// Specifies a direct sequence spread spectrum (DSSS) PHY.
            /// </summary>
            DSSS = 2,
            /// <summary>
            /// Specifies an infrared (IR) baseband PHY.
            /// </summary>
            IrBaseband = 3,
            /// <summary>
            /// Specifies an orthogonal frequency division multiplexing (OFDM) PHY. 802.11a devices can use OFDM.
            /// </summary>
            OFDM = 4,
            /// <summary>
            /// Specifies a high-rate DSSS (HRDSSS) PHY.
            /// </summary>
            HRDSSS = 5,
            /// <summary>
            /// Specifies an extended rate PHY (ERP). 802.11g devices can use ERP.
            /// </summary>
            ERP = 6,
            /// <summary>
            /// Specifies the start of the range that is used to define PHY types that are developed by an independent hardware vendor (IHV).
            /// </summary>
            IHV_Start = 0x80000000,
            /// <summary>
            /// Specifies the end of the range that is used to define PHY types that are developed by an independent hardware vendor (IHV).
            /// </summary>
            IHV_End = 0xffffffff
        }
 
        /// <summary>
        /// Defines a basic service set (BSS) network type.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>DOT11_BSS_TYPE</c> type.
        /// </remarks>
        public enum Dot11BssType
        {
            /// <summary>
            /// Specifies an infrastructure BSS network.
            /// </summary>
            Infrastructure = 1,
            /// <summary>
            /// Specifies an independent BSS (IBSS) network.
            /// </summary>
            Independent = 2,
            /// <summary>
            /// Specifies either infrastructure or IBSS network.
            /// </summary>
            Any = 3
        }
 
        /// <summary>
        /// Contains association attributes for a connection
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_ASSOCIATION_ATTRIBUTES</c> type.
        /// </remarks>
        [StructLayout(LayoutKind.Sequential)]
        public struct WlanAssociationAttributes
        {
            /// <summary>
            /// The SSID of the association.
            /// </summary>
            public Dot11Ssid dot11Ssid;
            /// <summary>
            /// Specifies whether the network is infrastructure or ad hoc.
            /// </summary>
            public Dot11BssType dot11BssType;
            /// <summary>
            /// The BSSID of the association.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
            public byte[] _dot11Bssid;
            /// <summary>
            /// The physical type of the association.
            /// </summary>
            public Dot11PhyType dot11PhyType;
            /// <summary>
            /// The position of the <see cref="Dot11PhyType"/> value in the structure containing the list of PHY types.
            /// </summary>
            public uint dot11PhyIndex;
            /// <summary>
            /// A percentage value that represents the signal quality of the network.
            /// This field contains a value between 0 and 100.
            /// A value of 0 implies an actual RSSI signal strength of -100 dbm.
            /// A value of 100 implies an actual RSSI signal strength of -50 dbm.
            /// You can calculate the RSSI signal strength value for values between 1 and 99 using linear interpolation.
            /// </summary>
            public uint wlanSignalQuality;
            /// <summary>
            /// The receiving rate of the association.
            /// </summary>
            public uint rxRate;
            /// <summary>
            /// The transmission rate of the association.
            /// </summary>
            public uint txRate;
 
            /// <summary>
            /// Gets the BSSID of the associated access point.
            /// </summary>
            /// <value>The BSSID.</value>
            public PhysicalAddress Dot11Bssid
            {
                get { return new PhysicalAddress(_dot11Bssid); }
            }
        }
 
        /// <summary>
        /// Defines the mode of connection.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_CONNECTION_MODE</c> type.
        /// </remarks>
        public enum WlanConnectionMode
        {
            /// <summary>
            /// A profile will be used to make the connection.
            /// </summary>
            Profile = 0,
            /// <summary>
            /// A temporary profile will be used to make the connection.
            /// </summary>
            TemporaryProfile,
            /// <summary>
            /// Secure discovery will be used to make the connection.
            /// </summary>
            DiscoverySecure,
            /// <summary>
            /// Unsecure discovery will be used to make the connection.
            /// </summary>
            DiscoveryUnsecure,
            /// <summary>
            /// A connection will be made automatically, generally using a persistent profile.
            /// </summary>
            Auto,
            /// <summary>
            /// Not used.
            /// </summary>
            Invalid
        }
 
        /// <summary>
        /// Defines a wireless LAN authentication algorithm.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>DOT11_AUTH_ALGORITHM</c> type.
        /// </remarks>
        public enum Dot11AuthAlgorithm : uint
        {
            /// <summary>
            /// Specifies an IEEE 802.11 Open System authentication algorithm.
            /// </summary>
            IEEE80211_Open = 1,
            /// <summary>
            /// Specifies an 802.11 Shared Key authentication algorithm that requires the use of a pre-shared Wired Equivalent Privacy (WEP) key for the 802.11 authentication.
            /// </summary>
            IEEE80211_SharedKey = 2,
            /// <summary>
            /// Specifies a Wi-Fi Protected Access (WPA) algorithm. IEEE 802.1X port authentication is performed by the supplicant, authenticator, and authentication server. Cipher keys are dynamically derived through the authentication process.
            /// <para>This algorithm is valid only for BSS types of <see cref="Dot11BssType.Infrastructure"/>.</para>
            /// <para>When the WPA algorithm is enabled, the 802.11 station will associate only with an access point whose beacon or probe responses contain the authentication suite of type 1 (802.1X) within the WPA information element (IE).</para>
            /// </summary>
            WPA = 3,
            /// <summary>
            /// Specifies a WPA algorithm that uses preshared keys (PSK). IEEE 802.1X port authentication is performed by the supplicant and authenticator. Cipher keys are dynamically derived through a preshared key that is used on both the supplicant and authenticator.
            /// <para>This algorithm is valid only for BSS types of <see cref="Dot11BssType.Infrastructure"/>.</para>
            /// <para>When the WPA PSK algorithm is enabled, the 802.11 station will associate only with an access point whose beacon or probe responses contain the authentication suite of type 2 (preshared key) within the WPA IE.</para>
            /// </summary>
            WPA_PSK = 4,
            /// <summary>
            /// This value is not supported.
            /// </summary>
            WPA_None = 5,
            /// <summary>
            /// Specifies an 802.11i Robust Security Network Association (RSNA) algorithm. WPA2 is one such algorithm. IEEE 802.1X port authentication is performed by the supplicant, authenticator, and authentication server. Cipher keys are dynamically derived through the authentication process.
            /// <para>This algorithm is valid only for BSS types of <see cref="Dot11BssType.Infrastructure"/>.</para>
            /// <para>When the RSNA algorithm is enabled, the 802.11 station will associate only with an access point whose beacon or probe responses contain the authentication suite of type 1 (802.1X) within the RSN IE.</para>
            /// </summary>
            RSNA = 6,
            /// <summary>
            /// Specifies an 802.11i RSNA algorithm that uses PSK. IEEE 802.1X port authentication is performed by the supplicant and authenticator. Cipher keys are dynamically derived through a preshared key that is used on both the supplicant and authenticator.
            /// <para>This algorithm is valid only for BSS types of <see cref="Dot11BssType.Infrastructure"/>.</para>
            /// <para>When the RSNA PSK algorithm is enabled, the 802.11 station will associate only with an access point whose beacon or probe responses contain the authentication suite of type 2(preshared key) within the RSN IE.</para>
            /// </summary>
            RSNA_PSK = 7,
            /// <summary>
            /// Indicates the start of the range that specifies proprietary authentication algorithms that are developed by an IHV.
            /// </summary>
            /// <remarks>
            /// This enumerator is valid only when the miniport driver is operating in Extensible Station (ExtSTA) mode.
            /// </remarks>
            IHV_Start = 0x80000000,
            /// <summary>
            /// Indicates the end of the range that specifies proprietary authentication algorithms that are developed by an IHV.
            /// </summary>
            /// <remarks>
            /// This enumerator is valid only when the miniport driver is operating in Extensible Station (ExtSTA) mode.
            /// </remarks>
            IHV_End = 0xffffffff
        }
 
        /// <summary>
        /// Defines a cipher algorithm for data encryption and decryption.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>DOT11_CIPHER_ALGORITHM</c> type.
        /// </remarks>
        public enum Dot11CipherAlgorithm : uint
        {
            /// <summary>
            /// Specifies that no cipher algorithm is enabled or supported.
            /// </summary>
            None = 0x00,
            /// <summary>
            /// Specifies a Wired Equivalent Privacy (WEP) algorithm, which is the RC4-based algorithm that is specified in the 802.11-1999 standard. This enumerator specifies the WEP cipher algorithm with a 40-bit cipher key.
            /// </summary>
            WEP40 = 0x01,
            /// <summary>
            /// Specifies a Temporal Key Integrity Protocol (TKIP) algorithm, which is the RC4-based cipher suite that is based on the algorithms that are defined in the WPA specification and IEEE 802.11i-2004 standard. This cipher also uses the Michael Message Integrity Code (MIC) algorithm for forgery protection.
            /// </summary>
            TKIP = 0x02,
            /// <summary>
            /// Specifies an AES-CCMP algorithm, as specified in the IEEE 802.11i-2004 standard and RFC 3610. Advanced Encryption Standard (AES) is the encryption algorithm defined in FIPS PUB 197.
            /// </summary>
            CCMP = 0x04,
            /// <summary>
            /// Specifies a WEP cipher algorithm with a 104-bit cipher key.
            /// </summary>
            WEP104 = 0x05,
            /// <summary>
            /// Specifies a Robust Security Network (RSN) Use Group Key cipher suite. For more information about the Use Group Key cipher suite, refer to Clause 7.3.2.9.1 of the IEEE 802.11i-2004 standard.
            /// </summary>
            WPA_UseGroup = 0x100,
            /// <summary>
            /// Specifies a Wifi Protected Access (WPA) Use Group Key cipher suite. For more information about the Use Group Key cipher suite, refer to Clause 7.3.2.9.1 of the IEEE 802.11i-2004 standard.
            /// </summary>
            RSN_UseGroup = 0x100,
            /// <summary>
            /// Specifies a WEP cipher algorithm with a cipher key of any length.
            /// </summary>
            WEP = 0x101,
            /// <summary>
            /// Specifies the start of the range that is used to define proprietary cipher algorithms that are developed by an independent hardware vendor (IHV).
            /// </summary>
            IHV_Start = 0x80000000,
            /// <summary>
            /// Specifies the end of the range that is used to define proprietary cipher algorithms that are developed by an IHV.
            /// </summary>
            IHV_End = 0xffffffff
        }
 
        /// <summary>
        /// Defines the security attributes for a wireless connection.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_SECURITY_ATTRIBUTES</c> type.
        /// </remarks>
        [StructLayout(LayoutKind.Sequential)]
        public struct WlanSecurityAttributes
        {
            /// <summary>
            /// Indicates whether security is enabled for this connection.
            /// </summary>
            [MarshalAs(UnmanagedType.Bool)]
            public bool securityEnabled;
            [MarshalAs(UnmanagedType.Bool)]
            public bool oneXEnabled;
            /// <summary>
            /// The authentication algorithm.
            /// </summary>
            public Dot11AuthAlgorithm dot11AuthAlgorithm;
            /// <summary>
            /// The cipher algorithm.
            /// </summary>
            public Dot11CipherAlgorithm dot11CipherAlgorithm;
        }
 
        /// <summary>
        /// Defines the attributes of a wireless connection.
        /// </summary>
        /// <remarks>
        /// Corresponds to the native <c>WLAN_CONNECTION_ATTRIBUTES</c> type.
        /// </remarks>
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        public struct WlanConnectionAttributes
        {
            /// <summary>
            /// The state of the interface.
            /// </summary>
            public WlanInterfaceState isState;
            /// <summary>
            /// The mode of the connection.
            /// </summary>
            public WlanConnectionMode wlanConnectionMode;
            /// <summary>
            /// The name of the profile used for the connection. Profile names are case-sensitive.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
            public string profileName;
            /// <summary>
            /// The attributes of the association.
            /// </summary>
            public WlanAssociationAttributes wlanAssociationAttributes;
            /// <summary>
            /// The security attributes of the connection.
            /// </summary>
            public WlanSecurityAttributes wlanSecurityAttributes;
        }
 
        /// <summary>
        /// Contains information about a LAN interface.
        /// </summary>
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
        public struct WlanInterfaceInfo
        {
            /// <summary>
            /// The GUID of the interface.
            /// </summary>
            public Guid interfaceGuid;
            /// <summary>
            /// The description of the interface.
            /// </summary>
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
            public string interfaceDescription;
            /// <summary>
            /// The current state of the interface.
            /// </summary>
            public WlanInterfaceState isState;
        }
 
        /// <summary>
        /// The header of the list returned by <see cref="WlanEnumInterfaces"/>.
        /// </summary>
        [StructLayout(LayoutKind.Sequential)]
        internal struct WlanInterfaceInfoListHeader
        {
            public uint numberOfItems;
            public uint index;
        }
         
 
        /// <summary>
        /// Flags that specifiy the miniport driver's current operation mode.
        /// </summary>
        [Flags]
        public enum Dot11OperationMode : uint
        {
            Unknown = 0x00000000,
            Station = 0x00000001,
            AP = 0x00000002,
            /// <summary>
            /// Specifies that the miniport driver supports the Extensible Station (ExtSTA) operation mode.
            /// </summary>
            ExtensibleStation = 0x00000004,
            /// <summary>
            /// Specifies that the miniport driver supports the Network Monitor (NetMon) operation mode.
            /// </summary>
            NetworkMonitor = 0x80000000
        }
        #endregion
 
        /// <summary>
        /// Helper method to wrap calls to Native WiFi API methods.
        /// If the method falls, throws an exception containing the error code.
        /// </summary>
        /// <param name="win32ErrorCode">The error code.</param>
        [DebuggerStepThrough]
        internal static void ThrowIfError(int win32ErrorCode)
        {
            if (win32ErrorCode != 0)
                throw new Win32Exception(win32ErrorCode);
        }
    }
    /// <summary>
    /// Represents a client to the Zeroconf (Native Wifi) service.
    /// </summary>
    /// <remarks>
    /// This class is the entrypoint to Native Wifi management. To manage WiFi settings, create an instance
    /// of this class.
    /// </remarks>
    public class WlanClient
    {
        /// <summary>
        /// Represents a Wifi network interface.
        /// </summary>
        public class WlanInterface
        {
            private WlanClient client;
            private Wlan.WlanInterfaceInfo info;
 
            #region Events
            /// <summary>
            /// Represents a method that will handle <see cref="WlanNotification"/> events.
            /// </summary>
            /// <param name="notifyData">The notification data.</param>
            public delegate void WlanNotificationEventHandler(Wlan.WlanNotificationData notifyData);
 
            /// <summary>
            /// Represents a method that will handle <see cref="WlanConnectionNotification"/> events.
            /// </summary>
            /// <param name="notifyData">The notification data.</param>
            /// <param name="connNotifyData">The notification data.</param>
            public delegate void WlanConnectionNotificationEventHandler(Wlan.WlanNotificationData notifyData, Wlan.WlanConnectionNotificationData connNotifyData);
 
            /// <summary>
            /// Represents a method that will handle <see cref="WlanReasonNotification"/> events.
            /// </summary>
            /// <param name="notifyData">The notification data.</param>
            /// <param name="reasonCode">The reason code.</param>
            public delegate void WlanReasonNotificationEventHandler(Wlan.WlanNotificationData notifyData, Wlan.WlanReasonCode reasonCode);
 
            /// <summary>
            /// Occurs when an event of any kind occurs on a WLAN interface.
            /// </summary>
            public event WlanNotificationEventHandler WlanNotification;
 
            /// <summary>
            /// Occurs when a WLAN interface changes connection state.
            /// </summary>
            public event WlanConnectionNotificationEventHandler WlanConnectionNotification;
 
            /// <summary>
            /// Occurs when a WLAN operation fails due to some reason.
            /// </summary>
            public event WlanReasonNotificationEventHandler WlanReasonNotification;
 
            #endregion
 
 
            internal WlanInterface(WlanClient client, Wlan.WlanInterfaceInfo info)
            {
                this.client = client;
                this.info = info;
            }
 
            /// <summary>
            /// Sets a parameter of the interface whose data type is <see cref="int"/>.
            /// </summary>
            /// <param name="opCode">The opcode of the parameter.</param>
            /// <param name="value">The value to set.</param>
            private void SetInterfaceInt(Wlan.WlanIntfOpcode opCode, int value)
            {
                IntPtr valuePtr = Marshal.AllocHGlobal(sizeof(int));
                Marshal.WriteInt32(valuePtr, value);
                try
                {
                    Wlan.ThrowIfError(
                        Wlan.WlanSetInterface(client.clientHandle, info.interfaceGuid, opCode, sizeof(int), valuePtr, IntPtr.Zero));
                }
                finally
                {
                    Marshal.FreeHGlobal(valuePtr);
                }
            }
 
            /// <summary>
            /// Gets a parameter of the interface whose data type is <see cref="int"/>.
            /// </summary>
            /// <param name="opCode">The opcode of the parameter.</param>
            /// <returns>The integer value.</returns>
            private int GetInterfaceInt(Wlan.WlanIntfOpcode opCode)
            {
                IntPtr valuePtr;
                int valueSize;
                Wlan.WlanOpcodeValueType opcodeValueType;
                Wlan.ThrowIfError(
                    Wlan.WlanQueryInterface(client.clientHandle, info.interfaceGuid, opCode, IntPtr.Zero, out valueSize, out valuePtr, out opcodeValueType));
                try
                {
                    return Marshal.ReadInt32(valuePtr);
                }
                finally
                {
                    Wlan.WlanFreeMemory(valuePtr);
                }
            }
 
            /// <summary>
            /// Gets or sets a value indicating whether this <see cref="WlanInterface"/> is automatically configured.
            /// </summary>
            /// <value><c>true</c> if "autoconf" is enabled; otherwise, <c>false</c>.</value>
            public bool Autoconf
            {
                get
                {
                    return GetInterfaceInt(Wlan.WlanIntfOpcode.AutoconfEnabled) != 0;
                }
                set
                {
                    SetInterfaceInt(Wlan.WlanIntfOpcode.AutoconfEnabled, value ? 1 : 0);
                }
            }
 
            /// <summary>
            /// Gets or sets the BSS type for the indicated interface.
            /// </summary>
            /// <value>The type of the BSS.</value>
            public Wlan.Dot11BssType BssType
            {
                get
                {
                    return (Wlan.Dot11BssType) GetInterfaceInt(Wlan.WlanIntfOpcode.BssType);
                }
                set
                {
                    SetInterfaceInt(Wlan.WlanIntfOpcode.BssType, (int)value);
                }
            }
 
            /// <summary>
            /// Gets the state of the interface.
            /// </summary>
            /// <value>The state of the interface.</value>
            public Wlan.WlanInterfaceState InterfaceState
            {
                get
                {
                    return (Wlan.WlanInterfaceState)GetInterfaceInt(Wlan.WlanIntfOpcode.InterfaceState);
                }
            }
 
            /// <summary>
            /// Gets the channel.
            /// </summary>
            /// <value>The channel.</value>
            /// <remarks>Not supported on Windows XP SP2.</remarks>
            public int Channel
            {
                get
                {
                    return GetInterfaceInt(Wlan.WlanIntfOpcode.ChannelNumber);
                }
            }
 
            /// <summary>
            /// Gets the RSSI.
            /// </summary>
            /// <value>The RSSI.</value>
            /// <remarks>Not supported on Windows XP SP2.</remarks>
            public int RSSI
            {
                get
                {
                    return GetInterfaceInt(Wlan.WlanIntfOpcode.RSSI);
                }
            }
 
            /// <summary>
            /// Gets the current operation mode.
            /// </summary>
            /// <value>The current operation mode.</value>
            /// <remarks>Not supported on Windows XP SP2.</remarks>
            public Wlan.Dot11OperationMode CurrentOperationMode
            {
                get
                {
                    return (Wlan.Dot11OperationMode) GetInterfaceInt(Wlan.WlanIntfOpcode.CurrentOperationMode);
                }
            }
 
            /// <summary>
            /// Gets the attributes of the current connection.
            /// </summary>
            /// <value>The current connection attributes.</value>
            /// <exception cref="Win32Exception">An exception with code 0x0000139F (The group or resource is not in the correct state to perform the requested operation.) will be thrown if the interface is not connected to a network.</exception>
            public Wlan.WlanConnectionAttributes CurrentConnection
            {
                get
                {
                    int valueSize;
                    IntPtr valuePtr;
                    Wlan.WlanOpcodeValueType opcodeValueType;
                    Wlan.ThrowIfError(
                        Wlan.WlanQueryInterface(client.clientHandle, info.interfaceGuid, Wlan.WlanIntfOpcode.CurrentConnection, IntPtr.Zero, out valueSize, out valuePtr, out opcodeValueType));
                    try
                    {
                            return (Wlan.WlanConnectionAttributes)Marshal.PtrToStructure(valuePtr, typeof(Wlan.WlanConnectionAttributes));
                    }
                    finally
                    {
                        Wlan.WlanFreeMemory(valuePtr);
                    }
                }
            }
 
            /// <summary>
            /// Requests a scan for available networks.
            /// </summary>
            /// <remarks>
            /// The method returns immediately. Progress is reported through the <see cref="WlanNotification"/> event.
            /// </remarks>
            public void Scan()
            {
                Wlan.ThrowIfError(
                    Wlan.WlanScan(client.clientHandle, info.interfaceGuid, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero));
            }
 
            /// <summary>
            /// Converts a pointer to a available networks list (header + entries) to an array of available network entries.
            /// </summary>
            /// <param name="bssListPtr">A pointer to an available networks list's header.</param>
            /// <returns>An array of available network entries.</returns>
            private Wlan.WlanAvailableNetwork[] ConvertAvailableNetworkListPtr(IntPtr availNetListPtr)
            {
                Wlan.WlanAvailableNetworkListHeader availNetListHeader = (Wlan.WlanAvailableNetworkListHeader)Marshal.PtrToStructure(availNetListPtr, typeof(Wlan.WlanAvailableNetworkListHeader));
                long availNetListIt = availNetListPtr.ToInt64() + Marshal.SizeOf(typeof(Wlan.WlanAvailableNetworkListHeader));
                Wlan.WlanAvailableNetwork[] availNets = new Wlan.WlanAvailableNetwork[availNetListHeader.numberOfItems];
                for (int i = 0; i < availNetListHeader.numberOfItems; ++i)
                {
                    availNets[i] = (Wlan.WlanAvailableNetwork)Marshal.PtrToStructure(new IntPtr(availNetListIt), typeof(Wlan.WlanAvailableNetwork));
                    availNetListIt += Marshal.SizeOf(typeof(Wlan.WlanAvailableNetwork));
                }
                return availNets;
            }
 
            /// <summary>
            /// Retrieves the list of available networks.
            /// </summary>
            /// <param name="flags">Controls the type of networks returned.</param>
            /// <returns>A list of the available networks.</returns>
            public Wlan.WlanAvailableNetwork[] GetAvailableNetworkList(Wlan.WlanGetAvailableNetworkFlags flags)
            {
                IntPtr availNetListPtr;
                Wlan.ThrowIfError(
                    Wlan.WlanGetAvailableNetworkList(client.clientHandle, info.interfaceGuid, flags, IntPtr.Zero, out availNetListPtr));
                try
                {
                    return ConvertAvailableNetworkListPtr(availNetListPtr);
                }
                finally
                {
                    Wlan.WlanFreeMemory(availNetListPtr);
                }
            }
 
            /// <summary>
            /// Converts a pointer to a BSS list (header + entries) to an array of BSS entries.
            /// </summary>
            /// <param name="bssListPtr">A pointer to a BSS list's header.</param>
            /// <returns>An array of BSS entries.</returns>
            private Wlan.WlanBssEntry[] ConvertBssListPtr(IntPtr bssListPtr)
            {
                Wlan.WlanBssListHeader bssListHeader = (Wlan.WlanBssListHeader)Marshal.PtrToStructure(bssListPtr, typeof(Wlan.WlanBssListHeader));
                long bssListIt = bssListPtr.ToInt64() + Marshal.SizeOf(typeof(Wlan.WlanBssListHeader));
                Wlan.WlanBssEntry[] bssEntries = new Wlan.WlanBssEntry[bssListHeader.numberOfItems];
                for (int i=0; i<bssListHeader.numberOfItems; ++i)
                {
                    bssEntries[i] = (Wlan.WlanBssEntry)Marshal.PtrToStructure(new IntPtr(bssListIt), typeof(Wlan.WlanBssEntry));
                    bssListIt += Marshal.SizeOf(typeof(Wlan.WlanBssEntry));
                }
                return bssEntries;
            }
 
            /// <summary>
            /// Retrieves the basic service sets (BSS) list of all available networks.
            /// </summary>
            public Wlan.WlanBssEntry[] GetNetworkBssList()
            {
                IntPtr bssListPtr;
                Wlan.ThrowIfError(
                    Wlan.WlanGetNetworkBssList(client.clientHandle, info.interfaceGuid, IntPtr.Zero, Wlan.Dot11BssType.Any, false, IntPtr.Zero, out bssListPtr));
                try
                {
                    return ConvertBssListPtr(bssListPtr);
                }
                finally
                {
                    Wlan.WlanFreeMemory(bssListPtr);
                }
            }
 
            /// <summary>
            /// Retrieves the basic service sets (BSS) list of the specified network.
            /// </summary>
            /// <param name="ssid">Specifies the SSID of the network from which the BSS list is requested.</param>
            /// <param name="bssType">Indicates the BSS type of the network.</param>
            /// <param name="securityEnabled">Indicates whether security is enabled on the network.</param>
            public Wlan.WlanBssEntry[] GetNetworkBssList(Wlan.Dot11Ssid ssid, Wlan.Dot11BssType bssType, bool securityEnabled)
            {
                IntPtr ssidPtr = Marshal.AllocHGlobal(Marshal.SizeOf(ssid));
                Marshal.StructureToPtr(ssid, ssidPtr, false);
                try
                {
                    IntPtr bssListPtr;
                    Wlan.ThrowIfError(
                        Wlan.WlanGetNetworkBssList(client.clientHandle, info.interfaceGuid, ssidPtr, bssType, securityEnabled, IntPtr.Zero, out bssListPtr));
                    try
                    {
                        return ConvertBssListPtr(bssListPtr);
                    }
                    finally
                    {
                        Wlan.WlanFreeMemory(bssListPtr);
                    }
                }
                finally
                {
                    Marshal.FreeHGlobal(ssidPtr);
                }
            }
 
 
 
            internal void OnWlanConnection(Wlan.WlanNotificationData notifyData, Wlan.WlanConnectionNotificationData connNotifyData)
            {
                if (WlanConnectionNotification != null)
                    WlanConnectionNotification(notifyData, connNotifyData);
            }
 
            internal void OnWlanReason(Wlan.WlanNotificationData notifyData, Wlan.WlanReasonCode reasonCode)
            {
                if (WlanReasonNotification != null)
                    WlanReasonNotification(notifyData, reasonCode);
            }
 
            internal void OnWlanNotification(Wlan.WlanNotificationData notifyData)
            {
                if (WlanNotification != null)
                    WlanNotification(notifyData);
            }
 
            /// <summary>
            /// Gets the network interface of this wireless interface.
            /// </summary>
            /// <remarks>
            /// The network interface allows querying of generic network properties such as the interface's IP address.
            /// </remarks>
            public NetworkInterface NetworkInterface
            {
                get
                {
                    // Do not cache the NetworkInterface; We need it fresh
                    // each time cause otherwise it caches the IP information.
                    foreach (NetworkInterface netIface in NetworkInterface.GetAllNetworkInterfaces())
                    {
                        Guid netIfaceGuid = new Guid(netIface.Id);
                        if (netIfaceGuid.Equals(info.interfaceGuid))
                        {
                            return netIface;
                        }
                    }
                    return null;
                }
            }
 
            /// <summary>
            /// The GUID of the interface (same content as the <see cref="System.Net.NetworkInformation.NetworkInterface.Id"/> value).
            /// </summary>
            public Guid InterfaceGuid
            {
                get { return info.interfaceGuid; }
            }
 
            /// <summary>
            /// The description of the interface.
            /// This is a user-immutable string containing the vendor and model name of the adapter.
            /// </summary>
            public string InterfaceDescription
            {
                get { return info.interfaceDescription; }
            }
 
            /// <summary>
            /// The friendly name given to the interface by the user (e.g. "Local Area Network Connection").
            /// </summary>
            public string InterfaceName
            {
                get { return NetworkInterface.Name; }
            }
        }
 
        private IntPtr clientHandle;
        private uint negotiatedVersion;
        private Wlan.WlanNotificationCallbackDelegate wlanNotificationCallback;
 
        private Dictionary<Guid,WlanInterface> ifaces = new Dictionary<Guid,WlanInterface>();
 
        /// <summary>
        /// Creates a new instance of a Native Wifi service client.
        /// </summary>
        public WlanClient()
        {
            Wlan.ThrowIfError(
                Wlan.WlanOpenHandle(Wlan.WLAN_CLIENT_VERSION_XP_SP2, IntPtr.Zero, out negotiatedVersion, out clientHandle));
            try
            {
                Wlan.WlanNotificationSource prevSrc;
                wlanNotificationCallback = new Wlan.WlanNotificationCallbackDelegate(OnWlanNotification);
                Wlan.ThrowIfError(
                    Wlan.WlanRegisterNotification(clientHandle, Wlan.WlanNotificationSource.All, false, wlanNotificationCallback, IntPtr.Zero, IntPtr.Zero, out prevSrc));
            }
            catch
            {
                Wlan.WlanCloseHandle(clientHandle, IntPtr.Zero);
                throw;
            }
        }
 
        ~WlanClient()
        {
            Wlan.WlanCloseHandle(clientHandle, IntPtr.Zero);
        }
 
        private Wlan.WlanConnectionNotificationData? ParseWlanConnectionNotification(ref Wlan.WlanNotificationData notifyData)
        {
            int expectedSize = Marshal.SizeOf(typeof(Wlan.WlanConnectionNotificationData));
            if (notifyData.dataSize < expectedSize)
                return null;
 
            Wlan.WlanConnectionNotificationData connNotifyData =
                (Wlan.WlanConnectionNotificationData)
                Marshal.PtrToStructure(notifyData.dataPtr, typeof(Wlan.WlanConnectionNotificationData));
            if (connNotifyData.wlanReasonCode == Wlan.WlanReasonCode.Success)
            {
                IntPtr profileXmlPtr = new IntPtr(
                    notifyData.dataPtr.ToInt64() +
                    Marshal.OffsetOf(typeof(Wlan.WlanConnectionNotificationData), "profileXml").ToInt64());
                connNotifyData.profileXml = Marshal.PtrToStringUni(profileXmlPtr);
            }
            return connNotifyData;
        }
 
        private void OnWlanNotification(ref Wlan.WlanNotificationData notifyData, IntPtr context)
        {
            WlanInterface wlanIface = ifaces.ContainsKey(notifyData.interfaceGuid) ? ifaces[notifyData.interfaceGuid] : null;
 
            switch(notifyData.notificationSource)
            {
                case Wlan.WlanNotificationSource.ACM:
                    switch((Wlan.WlanNotificationCodeAcm)notifyData.notificationCode)
                    {
                        case Wlan.WlanNotificationCodeAcm.ConnectionStart:
                        case Wlan.WlanNotificationCodeAcm.ConnectionComplete:
                        case Wlan.WlanNotificationCodeAcm.ConnectionAttemptFail:
                        case Wlan.WlanNotificationCodeAcm.Disconnecting:
                        case Wlan.WlanNotificationCodeAcm.Disconnected:
                            Wlan.WlanConnectionNotificationData? connNotifyData = ParseWlanConnectionNotification(ref notifyData);
                            if (connNotifyData.HasValue)
                                if (wlanIface != null)
                                    wlanIface.OnWlanConnection(notifyData, connNotifyData.Value);
                            break;
                        case Wlan.WlanNotificationCodeAcm.ScanFail:
                            {
                                int expectedSize = Marshal.SizeOf(typeof (Wlan.WlanReasonCode));
                                if (notifyData.dataSize >= expectedSize)
                                {
                                    Wlan.WlanReasonCode reasonCode = (Wlan.WlanReasonCode) Marshal.ReadInt32(notifyData.dataPtr);
                                    if (wlanIface != null)
                                        wlanIface.OnWlanReason(notifyData, reasonCode);
                                }
                            }
                            break;
                    }
                    break;
                case Wlan.WlanNotificationSource.MSM:
                    switch((Wlan.WlanNotificationCodeMsm)notifyData.notificationCode)
                    {
                        case Wlan.WlanNotificationCodeMsm.Associating:
                        case Wlan.WlanNotificationCodeMsm.Associated:
                        case Wlan.WlanNotificationCodeMsm.Authenticating:
                        case Wlan.WlanNotificationCodeMsm.Connected:
                        case Wlan.WlanNotificationCodeMsm.RoamingStart:
                        case Wlan.WlanNotificationCodeMsm.RoamingEnd:
                        case Wlan.WlanNotificationCodeMsm.Disassociating:
                        case Wlan.WlanNotificationCodeMsm.Disconnected:
                        case Wlan.WlanNotificationCodeMsm.PeerJoin:
                        case Wlan.WlanNotificationCodeMsm.PeerLeave:
                        case Wlan.WlanNotificationCodeMsm.AdapterRemoval:
                            Wlan.WlanConnectionNotificationData? connNotifyData = ParseWlanConnectionNotification(ref notifyData);
                            if (connNotifyData.HasValue)
                                if (wlanIface != null)
                                    wlanIface.OnWlanConnection(notifyData, connNotifyData.Value);
                            break;
                    }
                    break;
            }
             
            if (wlanIface != null)
                wlanIface.OnWlanNotification(notifyData);
        }
 
        /// <summary>
        /// Gets the WLAN interfaces.
        /// </summary>
        /// <value>The WLAN interfaces.</value>
        public WlanInterface[] Interfaces
        {
            get
            {
                IntPtr ifaceList;
                Wlan.ThrowIfError(
                    Wlan.WlanEnumInterfaces(clientHandle, IntPtr.Zero, out ifaceList));
                try
                {
                    Wlan.WlanInterfaceInfoListHeader header =
                        (Wlan.WlanInterfaceInfoListHeader) Marshal.PtrToStructure(ifaceList, typeof (Wlan.WlanInterfaceInfoListHeader));
                    Int64 listIterator = ifaceList.ToInt64() + Marshal.SizeOf(header);
                    WlanInterface[] interfaces = new WlanInterface[header.numberOfItems];
                    List<Guid> currentIfaceGuids = new List<Guid>();
                    for (int i = 0; i < header.numberOfItems; ++i)
                    {
                        Wlan.WlanInterfaceInfo info =
                            (Wlan.WlanInterfaceInfo) Marshal.PtrToStructure(new IntPtr(listIterator), typeof (Wlan.WlanInterfaceInfo));
                        listIterator += Marshal.SizeOf(info);
                        WlanInterface wlanIface;
                        currentIfaceGuids.Add(info.interfaceGuid);
                        if (ifaces.ContainsKey(info.interfaceGuid))
                            wlanIface = ifaces[info.interfaceGuid];
                        else
                            wlanIface = new WlanInterface(this, info);
                        interfaces[i] = wlanIface;
                        ifaces[info.interfaceGuid] = wlanIface;
                    }
 
                    // Remove stale interfaces
                    Queue<Guid> deadIfacesGuids = new Queue<Guid>();
                    foreach (Guid ifaceGuid in ifaces.Keys)
                    {
                        if (!currentIfaceGuids.Contains(ifaceGuid))
                            deadIfacesGuids.Enqueue(ifaceGuid);
                    }
                    while(deadIfacesGuids.Count != 0)
                    {
                        Guid deadIfaceGuid = deadIfacesGuids.Dequeue();
                        ifaces.Remove(deadIfaceGuid);
                    }
 
                    return interfaces;
                }
                finally
                {
                    Wlan.WlanFreeMemory(ifaceList);
                }
            }
        }
 
        /// <summary>
        /// Gets a string that describes a specified reason code.
        /// </summary>
        /// <param name="reasonCode">The reason code.</param>
        /// <returns>The string.</returns>
        public string GetStringForReasonCode(Wlan.WlanReasonCode reasonCode)
        {
            StringBuilder sb = new StringBuilder(1024); // the 1024 size here is arbitrary; the WlanReasonCodeToString docs fail to specify a recommended size
            Wlan.ThrowIfError(
                Wlan.WlanReasonCodeToString(reasonCode, sb.Capacity, sb, IntPtr.Zero));
            return sb.ToString();
        }
    }
}