-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathTunnel.c
1268 lines (1134 loc) · 32.2 KB
/
Tunnel.c
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
////////////////////////////////////////////////////////////////////////////////
//
// Global including files.
//
// Including the files for the system.
//
// These including files are generally used in different operation system.
//
////////////////////////////////////////////////////////////////////////////////
#include "Global.h"
//For windows.
#ifdef _MICROSOFT_WINDOWS
#include <windows.h>
#include <winioctl.h>
#include <winsock.h>
#endif
//For linux.
#ifdef _REDHAT_LINUX
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/select.h>
#endif
//Default Timeout
#define DEFAULT_TIMEOUT SECOND
////////////////////////////////////////////////////////////////////////////////
//
// Directorys
//
////////////////////////////////////////////////////////////////////////////////
//User Mode Device Directory
#define USER_MODE_DEVICE_DIRECTORY "\\\\.\\Global\\"
//System Device Directory
#define SYSTEM_DEVICE_DIRECTORY "\\Device\\"
//User Device Directory
#define USER_DEVICE_DIRECTORY "\\DosDevices\\Global\\"
//Tap Suffix
#define TAP_SUFFIX ".tap"
////////////////////////////////////////////////////////////////////////////////
//
// TAP IOCTLs.
//
////////////////////////////////////////////////////////////////////////////////
#define TAP_CONTROL_CODE(request,method) \
CTL_CODE(FILE_DEVICE_UNKNOWN,request,method,FILE_ANY_ACCESS)
//Version 8.1
#define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE(1,METHOD_BUFFERED)
#define TAP_IOCTL_GET_VERSION TAP_CONTROL_CODE(2,METHOD_BUFFERED)
#define TAP_IOCTL_GET_MTU TAP_CONTROL_CODE(3,METHOD_BUFFERED)
#define TAP_IOCTL_GET_INFO TAP_CONTROL_CODE(4,METHOD_BUFFERED)
#define TAP_IOCTL_CONFIG_POINT_TO_POINT TAP_CONTROL_CODE(5,METHOD_BUFFERED)
#define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE(6,METHOD_BUFFERED)
#define TAP_IOCTL_CONFIG_DHCP_MASQ TAP_CONTROL_CODE(7,METHOD_BUFFERED)
#define TAP_IOCTL_GET_LOG_LINE TAP_CONTROL_CODE(8,METHOD_BUFFERED)
#define TAP_IOCTL_CONFIG_DHCP_SET_OPT TAP_CONTROL_CODE(9,METHOD_BUFFERED)
//Version 8.2
#define TAP_IOCTL_CONFIG_TUN TAP_CONTROL_CODE (10, METHOD_BUFFERED)
////////////////////////////////////////////////////////////////////////////////
//
// Initialize tunnel environment.
//
////////////////////////////////////////////////////////////////////////////////
_BOOL InitializeTunnelEnvironment()
{
//Load adapters information list.
if(!LoadAdaptersInformationList())
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::InitializeTunnelEnvironment : fail to load adapters information list !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
//Show adapters information list.
ShowAdaptersInformationList();
//Load interface information list.
if(!LoadInterfaceInformationList())
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::InitializeTunnelEnvironment : fail to load interfaces information list !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
//Show interface information list.
ShowInterfaceInformationList();
//Load adapters.
if(!LoadNetworkAdapters())
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::InitializeTunnelEnvironment : fail to load network adapters !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FAILURE;
}
//Show adapters.
ShowNetworkAdapters();
//Load connections.
if(!LoadNetworkConnections())
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::InitializeTunnelEnvironment : fail to load network connections !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FAILURE;
}
//Show connections.
ShowNetworkConnections();
//Return true.
return _TRUE;
}
////////////////////////////////////////////////////////////////////////////////
//
// Uninitialize tunnel environment.
//
////////////////////////////////////////////////////////////////////////////////
void UninitializeTunnelEnvironment()
{
//Release connections.
ReleaseNetworkConnections();
//Release adapters.
ReleaseNetworkAdapters();
//Unload interface information list.
UnloadInterfaceInformationList();
//Unload adapters information list.
UnloadAdaptersInformationList();
}
////////////////////////////////////////////////////////////////////////////////
//
// Network ARP response.
//
////////////////////////////////////////////////////////////////////////////////
_BOOL NetworkARPResponse(NetworkTunnel* pTunnel,_MAC6 macDestination,_IPV4 ipDestination)
{
//Buffer
SimpleBuffer buffer;
//Ethernet Packet
EthernetPacket packet;
#ifdef _DEBUG
assert(pTunnel != NULL && pTunnel->lpHandle != INVALID_HANDLE_VALUE);
#endif
//Initialize packet.
InitializeEthernetPacket(&packet);
//Set ethernet packet.
//Set MAC source address.
memcpy(packet.header.macSource,pTunnel->macRemote,sizeof(_MAC6));
//Set MAC destination address.
memcpy(packet.header.macDestination,macDestination,sizeof(_MAC6));
//Set protocol type.
packet.header.nProtocolType = 0x0806;//ARP
//Set ARP packet.
//Initialize ARP packet.
InitializeARPPacket(&packet.arpPacket);
//Set opertaion.
packet.arpPacket.nOperation = 2;//ARP Response
//Set MAC source address.
memcpy(packet.arpPacket.macSource,pTunnel->macRemote,sizeof(_MAC6));
//Set IP source address.
memcpy(packet.arpPacket.ipSource,pTunnel->ipRemote,sizeof(_IPV4));
//Set MAC destination address.
memcpy(packet.arpPacket.macDestination,macDestination,sizeof(_MAC6));
//Set IP destination address.
memcpy(packet.arpPacket.ipDestination,ipDestination,sizeof(_IPV4));
#ifdef _DEBUG
//Dump packet.
DumpEthernetPacket(&packet);
#endif
//Initialize buffer.
InitializeBuffer(&buffer);
//Wrap packet.
if(!WrapEthernetPacket(&buffer,&packet))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkARPResponse : fail to wrap packet !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
//Log buffer.
LogBuffer(&buffer);
#endif
//Write response.
if(!WriteNetworkTunnel(pTunnel,(_BYTE *)buffer.block,&buffer.nCount))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkARPResponse : fail to write response !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
//Return true.
return _TRUE;
}
////////////////////////////////////////////////////////////////////////////////
//
// Network Ping response.
//
////////////////////////////////////////////////////////////////////////////////
_BOOL NetworkPingResponse(NetworkTunnel* pTunnel,_MAC6 macDestination,_IPV4 ipDestination,IPPacket* lpPacket)
{
//Buffer
SimpleBuffer buffer;
//Ethernet Packet
EthernetPacket packet;
#ifdef _DEBUG
assert(pTunnel != NULL && pTunnel->lpHandle != INVALID_HANDLE_VALUE);
assert(lpPacket != NULL);
#endif
//Initialize packet.
InitializeEthernetPacket(&packet);
//Set ethernet packet.
//Set MAC source address.
memcpy(packet.header.macSource,pTunnel->macRemote,sizeof(_MAC6));
//Set MAC destination address.
memcpy(packet.header.macDestination,macDestination,sizeof(_MAC6));
//Set protocol type.
packet.header.nProtocolType = 0x0800;//IP
//Initialize IP packet.
InitializeIPPacket(&packet.ipPacket);
//Set IP packet.
packet.ipPacket.nID = lpPacket->nID;
//Set protocol.
packet.ipPacket.nProtocol = 1;//ICMP
//Set IP source address.
memcpy(packet.ipPacket.ipSource,pTunnel->ipRemote,sizeof(_IPV4));
//Set IP destination address.
memcpy(packet.ipPacket.ipDestination,ipDestination,sizeof(_IPV4));
//Copy ICMP packet.
memcpy(&packet.ipPacket.icmpPacket,&lpPacket->icmpPacket,sizeof(ICMPPacket));
//Set type.
packet.ipPacket.icmpPacket.nType = 0;//Echo Response
//Set code.
packet.ipPacket.icmpPacket.nCode = 0;//Success
//Get checksum.
if(!GetICMPPacketChecksum(&packet.ipPacket.icmpPacket))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkPingResponse : fail to get checksum !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
//Set total length.
packet.ipPacket.nTotalLength = packet.ipPacket.nHeaderLength * sizeof(_UINT32) +
8 * sizeof(_UINT8) + packet.ipPacket.icmpPacket.buffer.nCount;
//Get checksum.
if(!GetIPPacketChecksum(&packet.ipPacket))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkPingResponse : fail to get checksum !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
//Dump packet.
DumpEthernetPacket(&packet);
#endif
//Initialize buffer.
InitializeBuffer(&buffer);
//Wrap packet.
if(!WrapEthernetPacket(&buffer,&packet))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkPingResponse : fail to wrap packet !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
//Log buffer.
LogBuffer(&buffer);
#endif
//Write response.
if(!WriteNetworkTunnel(pTunnel,(_BYTE *)buffer.block,&buffer.nCount))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkPingResponse : fail to write response !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
//Return true.
return _TRUE;
}
////////////////////////////////////////////////////////////////////////////////
//
// Network L2TP Out.
//
////////////////////////////////////////////////////////////////////////////////
_BOOL NetworkL2TPOut(NetworkTunnel* pTunnel,IPPacket* lpPacket)
{
#ifdef _DEBUG
assert(pTunnel != NULL && pTunnel->lpHandle != INVALID_HANDLE_VALUE);
assert(lpPacket != NULL);
#endif
//Send udp data.
if(!SendUDPBuffer(pTunnel->socketUDP,(_BYTE *)lpPacket->udpPacket.buffer.block,&lpPacket->udpPacket.buffer.nCount))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkL2TPOut : fail to send L2TP packet !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
//Return true.
return _TRUE;
}
////////////////////////////////////////////////////////////////////////////////
//
// Network read process.
//
////////////////////////////////////////////////////////////////////////////////
_BOOL NetworkReadProcess(_OBJECT lpObject)
{
//Network Tunnel
NetworkTunnel* pTunnel;
//Simple Buffer
SimpleBuffer buffer;
//Ethernet Packet
EthernetPacket packet;
#ifdef _DEBUG
assert(lpObject != NULL);
#endif
//Change argument.
pTunnel = (NetworkTunnel *)lpObject;
#ifdef _DEBUG
assert(pTunnel->socketUDP != _INVALID_SOCKET);
#endif
//Initialize buffer.
InitializeBuffer(&buffer);
//Set count.
buffer.nCount = BLOCK_SIZE;
//Try to read it.
if(!ReadNetworkTunnel(pTunnel,(_BYTE *)&buffer.block,&buffer.nCount))
{
//Return true.
return _TRUE;
}
//Check count.
if(buffer.nCount <= 0)
{
//Return true.
return _TRUE;
}
//Add read size.
pTunnel->nReadSize += buffer.nCount;
#ifdef _DEBUG
//Log buffer.
LogBuffer(&buffer);
#endif
//Unwrap packet.
if(!UnwrapEthernetPacket(&buffer,&packet))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkReadProcess : fail to unwrap packet !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _TRUE;
}
#ifdef _DEBUG
//Dump packet.
DumpEthernetPacket(&packet);
#endif
//Check packet.
if(packet.header.nProtocolType == 0x0806)
{
//Check destination.
if(memcmp(packet.arpPacket.ipDestination,pTunnel->ipRemote,sizeof(_IPV4)) != 0)
{
//Return true.
return _TRUE;
}
//Network ARP response.
if(!NetworkARPResponse(pTunnel,packet.arpPacket.macSource,packet.arpPacket.ipSource))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkReadProcess : fail to do ARP response !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
}
}
else if(packet.header.nProtocolType == 0x0800)
{
//Check destination.
if(memcmp(packet.ipPacket.ipDestination,pTunnel->ipRemote,sizeof(_IPV4)) != 0)
{
//Return true.
return _TRUE;
}
//Check protocol type.
if(packet.ipPacket.nProtocol == 1)
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkReadProcess : ICMP packet was received !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Check icmp type.
if(packet.ipPacket.icmpPacket.nType == 8)
{
//Do ping response.
if(!NetworkPingResponse(pTunnel,packet.header.macSource,packet.ipPacket.ipSource,&packet.ipPacket))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkReadProcess : fail to do ping response !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
}
}
}
else if(packet.ipPacket.nProtocol == 17)
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkReadProcess : UDP packet was received !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Check icmp type.
if(packet.ipPacket.udpPacket.nDestinationPort = 1701)
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkReadProcess : L2TP packet was received !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Send L2TP packet.
if(!NetworkL2TPOut(pTunnel,&packet.ipPacket))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkReadProcess : L2TP packet was received !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
}
else
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkReadProcess : L2TP packet was sent !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
}
}
}
}
else
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkReadProcess : packet was discarded !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
}
//Return true.
return _TRUE;
}
////////////////////////////////////////////////////////////////////////////////
//
// Network write process.
//
////////////////////////////////////////////////////////////////////////////////
_BOOL NetworkWriteProcess(_OBJECT lpObject)
{
//Network Tunnel
NetworkTunnel* pTunnel;
//Simple Buffer
SimpleBuffer buffer;
//IP Packet
EthernetPacket packet;
#ifdef _DEBUG
assert(lpObject != NULL);
#endif
//Change argument.
pTunnel = (NetworkTunnel *)lpObject;
#ifdef _DEBUG
assert(pTunnel->socketUDP != _INVALID_SOCKET);
#endif
//Initialize buffer.
InitializeBuffer(&buffer);
//Set count.
buffer.nCount = BLOCK_SIZE;
//Receive buffer.
if(!ReceiveUDPBuffer(pTunnel->socketUDP,(_BYTE *)buffer.block,&buffer.nCount))
{
//Return true.
return _TRUE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkWriteProcess : receive UDP packet !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
//Check count,
if(buffer.nCount <= 0)
{
//Return true.
return _TRUE;
}
//Add write size.
pTunnel->nWriteSize += buffer.nCount;
#ifdef _DEBUG
//Log buffer.
LogBuffer(&buffer);
#endif
//Initialize packet.
InitializeEthernetPacket(&packet);
//Set ethernet packet.
//Set MAC source address.
memcpy(packet.header.macSource,pTunnel->macRemote,sizeof(_MAC6));
//Set MAC destination address.
memcpy(packet.header.macDestination,pTunnel->macLocal,sizeof(_MAC6));
//Set protocol type.
packet.header.nProtocolType = 0x0800;//IP
//Initialize IP packet.
InitializeIPPacket(&packet.ipPacket);
//Set IP packet.
//packet.ipPacket.nID = 0;
//Set protocol.
packet.ipPacket.nProtocol = 17;//UDP
//Set IP source address.
memcpy(packet.ipPacket.ipSource,pTunnel->ipRemote,sizeof(_IPV4));
//Set IP destination address.
memcpy(packet.ipPacket.ipDestination,pTunnel->ipLocal,sizeof(_IPV4));
//Get udp packet.
//Set source port.
packet.ipPacket.udpPacket.nSourcePort = 1701;
//Set destination port.
packet.ipPacket.udpPacket.nDestinationPort = 1701;
//Set
packet.ipPacket.udpPacket.nLength = buffer.nCount + 4 * sizeof(_UINT16);
//Copy buffer.
memcpy(&packet.ipPacket.udpPacket.buffer,&buffer,sizeof(SimpleBuffer));
//Set checksum.
packet.ipPacket.udpPacket.nChecksum = 0;
//Get checksum.
if(!GetUDPPacketChecksum(packet.ipPacket.ipSource,packet.ipPacket.ipDestination,&packet.ipPacket.udpPacket))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkWriteResponse : fail to get checksum !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
//Set total length.
packet.ipPacket.nTotalLength = packet.ipPacket.nHeaderLength * sizeof(_UINT32) + packet.ipPacket.udpPacket.nLength;
//Get checksum.
if(!GetIPPacketChecksum(&packet.ipPacket))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkWriteResponse : fail to get checksum !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
//Dump packet.
DumpEthernetPacket(&packet);
#endif
//Initialize buffer.
InitializeBuffer(&buffer);
//Wrap packet.
if(!WrapEthernetPacket(&buffer,&packet))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkWriteResponse : fail to wrap packet !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
//Log buffer.
LogBuffer(&buffer);
#endif
//Print.
PrintLine(stdout,"--------------------UDP packet was sent--------------------");
//Write response.
if(!WriteNetworkTunnel(pTunnel,(_BYTE *)buffer.block,&buffer.nCount))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::NetworkWriteResponse : fail to write response !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
//Return true.
return _TRUE;
}
////////////////////////////////////////////////////////////////////////////////
//
// Initialize network tunnel.
//
////////////////////////////////////////////////////////////////////////////////
void InitializeNetworkTunnel(NetworkTunnel* pTunnel)
{
#ifdef _DEBUG
assert(pTunnel != NULL);
#endif
//Clear.
memset(pTunnel,0,sizeof(NetworkTunnel));
//Set handle.
pTunnel->lpHandle = INVALID_HANDLE_VALUE;
//Clear socket.
pTunnel->socketUDP = _INVALID_SOCKET;
//Create overlapped.
pTunnel->lpRead = (OVERLAPPED *)malloc(sizeof(OVERLAPPED));
#ifdef _DEBG
assert(pTunnel->lpRead != NULL);
#endif
//Clear.
memset(pTunnel->lpRead,0,sizeof(OVERLAPPED));
//Set the read event.
((OVERLAPPED *)pTunnel->lpRead)->hEvent = INVALID_HANDLE_VALUE;
((OVERLAPPED *)pTunnel->lpRead)->Offset = 0;
((OVERLAPPED *)pTunnel->lpRead)->OffsetHigh = 0;
//Create overlapped.
pTunnel->lpWrite = (OVERLAPPED *)malloc(sizeof(OVERLAPPED));
#ifdef _DEBG
assert(pTunnel->lpWrite != NULL);
#endif
//Clear.
memset(pTunnel->lpWrite,0,sizeof(OVERLAPPED));
//Set the read event.
((OVERLAPPED *)pTunnel->lpWrite)->hEvent = INVALID_HANDLE_VALUE;
((OVERLAPPED *)pTunnel->lpWrite)->Offset = 0;
((OVERLAPPED *)pTunnel->lpWrite)->OffsetHigh = 0;
//Initialize thread.
InitializeThread(&pTunnel->readThread);
//Set name.
strcpy(pTunnel->readThread.strName,"NetworkReadProcess");
//Set process.
pTunnel->readThread.lpProcess = NetworkReadProcess;
//Set object.
pTunnel->readThread.lpObject = pTunnel;
//Set wait time.
pTunnel->readThread.nWaitTime = 0;
//Initialize thread.
InitializeThread(&pTunnel->writeThread);
//Set name.
strcpy(pTunnel->writeThread.strName,"NetworkWriteProcess");
//Set process.
pTunnel->writeThread.lpProcess = NetworkWriteProcess;
//Set object.
pTunnel->writeThread.lpObject = pTunnel;
//Set wait time.
pTunnel->writeThread.nWaitTime = 0;
}
////////////////////////////////////////////////////////////////////////////////
//
// Uninitialize network tunnel.
//
////////////////////////////////////////////////////////////////////////////////
void UninitializeNetworkTunnel(NetworkTunnel* pTunnel)
{
#ifdef _DEBUG
assert(pTunnel != NULL);
#endif
//Check result.
if(pTunnel->lpRead != NULL)
{
//Delete.
free(pTunnel->lpRead);
//Clear.
pTunnel->lpRead = NULL;
}
//Check result.
if(pTunnel->lpWrite != NULL)
{
//Delete.
free(pTunnel->lpWrite);
//Clear.
pTunnel->lpWrite = NULL;
}
}
////////////////////////////////////////////////////////////////////////////////
//
// Set TAP network tunnel status.
//
////////////////////////////////////////////////////////////////////////////////
_BOOL SetTAPNetworkTunnelStatus(NetworkTunnel* pTunnel,_BOOL bStatus)
{
//Length.
_INT32 nLength;
//Timeout.
SimpleTimeout timeout;
#ifdef _DEBUG
assert(pTunnel != NULL);
#endif
//Set length.
nLength = 0;
//Set status.
if(!DeviceIoControl(pTunnel->lpHandle,TAP_IOCTL_SET_MEDIA_STATUS,
&bStatus,sizeof(_BOOL),
&bStatus,sizeof(_BOOL),&nLength,NULL))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::SetTAPNetworkTunnelStatus : fail to set status of device !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::SetTAPNetworkTunnelStatus : wait its changing !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Initialize timeout.
InitializeTimeout(&timeout);
//Set timeout.
timeout.timeConsumed = DEFAULT_TIMEOUT;
//Wait device to come up.
while(!IsTimeout(&timeout)) SleepMilliseconds(SECOND);
#ifdef _DEBUG
LogRequestedEvent("Tunnel::SetTAPNetworkTunnelStatus : finish waiting !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Return true.
return _TRUE;
}
////////////////////////////////////////////////////////////////////////////////
//
// Open TAP network tunnel.
//
////////////////////////////////////////////////////////////////////////////////
_BOOL OpenTAPNetworkTunnel(NetworkTunnel* pTunnel)
{
//Status.
//Length.
_INT32 nLength;
//Device Path
_PASCALSTRING strDevicePath;
#ifdef _DEBUG
assert(pTunnel != NULL && strlen(pTunnel->strGuid) > 0);
#endif
//Format device path.
Format(strDevicePath,"%s%s%s",USER_MODE_DEVICE_DIRECTORY,pTunnel->strGuid,TAP_SUFFIX);
#ifdef _DEBUG
LogRequestedFormat(LOG_TUNNEL | LOG_INFORMATION,
"Tunnel::OpenTAPNetworkTunnel : device path(%s) !",strDevicePath);
#endif
//Create file.
pTunnel->lpHandle = CreateFile(strDevicePath,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ,
0,
OPEN_EXISTING,
FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED,
0);
//Check result.
if(pTunnel->lpHandle == INVALID_HANDLE_VALUE)
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : fail to open device !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : device was opened !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Set length.
nLength = 0;
//Get version.
if(!DeviceIoControl(pTunnel->lpHandle,TAP_IOCTL_GET_VERSION,
&pTunnel->nVersion,3 * sizeof(_UINT32),
&pTunnel->nVersion,3 * sizeof(_UINT32),&nLength,NULL))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : fail to get version of device !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedFormat(LOG_TUNNEL | LOG_INFORMATION,
"Tunnel::OpenTAPNetworkTunnel : version(%d.%d %s) !",
pTunnel->nVersion[0],pTunnel->nVersion[1],pTunnel->nVersion[2] ? "Debug" : "Release");
#endif
//Set length.
nLength = 0;
//Get MTU
if(!DeviceIoControl(pTunnel->lpHandle,TAP_IOCTL_GET_MTU,
&pTunnel->nMTUSize,sizeof(_UINT32),
&pTunnel->nMTUSize,sizeof(_UINT32),&nLength,NULL))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : fail to get MTU of device !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedFormat(LOG_TUNNEL | LOG_INFORMATION,
"Tunnel::OpenTAPNetworkTunnel : MTU(%d) !",pTunnel->nMTUSize);
#endif
//Set status.
if(!SetTAPNetworkTunnelStatus(pTunnel,_TRUE))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : fail to enable device !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : device was enabled !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Set local address.
if(!SetNetworkTunnelLocalAddress(pTunnel))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : fail to set local address !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : local address was set !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Create I/O event used for overlapped reads.
((OVERLAPPED *)pTunnel->lpRead)->hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
//Check result.
if(((OVERLAPPED *)pTunnel->lpRead)->hEvent == INVALID_HANDLE_VALUE)
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : Cannot create I/O event for reading !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : create I/O event for reading !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
//Create I/O event used for overlapped writes.
((OVERLAPPED *)pTunnel->lpWrite)->hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
//Check result.
if(((OVERLAPPED *)pTunnel->lpWrite)->hEvent == INVALID_HANDLE_VALUE)
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : cannot create I/O event for writing !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : create I/O event for writing !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Create socket.
pTunnel->socketUDP = ConnectUDPServer(pTunnel->strPeerAddress,pTunnel->nPeerPort);
//Check result.
if(pTunnel->socketUDP == _INVALID_SOCKET)
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : fail to connect server !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : server was connected !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Start write.
if(!StartupThread(&pTunnel->writeThread))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : fail to startup write thread !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : read thread was startup !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Start read.
if(!StartupThread(&pTunnel->readThread))
{
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : fail to startup read thread !",
LOG_TUNNEL | LOG_EXCEPTION);
#endif
return _FALSE;
}
#ifdef _DEBUG
LogRequestedEvent("Tunnel::OpenTAPNetworkTunnel : read thread was startup !",
LOG_TUNNEL | LOG_INFORMATION);
#endif
//Return true.
return _TRUE;
}
////////////////////////////////////////////////////////////////////////////////
//
// Open network tunnel.
//
////////////////////////////////////////////////////////////////////////////////