-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathBaseClient.cpp
4767 lines (4448 loc) · 182 KB
/
BaseClient.cpp
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
//this file is part of eMule
//Copyright (C)2002-2008 Merkur ( strEmail.Format("%s@%s", "devteam", "emule-project.net") / http://www.emule-project.net )
//
//This program is free software; you can redistribute it and/or
//modify it under the terms of the GNU General Public License
//as published by the Free Software Foundation; either
//version 2 of the License, or (at your option) any later version.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#include "stdafx.h"
#ifdef _DEBUG
#include "DebugHelpers.h"
#endif
#include "emule.h"
#include "UpDownClient.h"
#include "FriendList.h"
#include "Clientlist.h"
#include "OtherFunctions.h"
#include "PartFile.h"
#include "ListenSocket.h"
#include "Friend.h"
#include <zlib/zlib.h>
#include "Packets.h"
#include "Opcodes.h"
#include "SafeFile.h"
#include "Preferences.h"
#include "ClientCredits.h"
#include "IPFilter.h"
#include "Statistics.h"
#include "DownloadQueue.h"
#include "UploadQueue.h"
#include "SearchFile.h"
#include "SearchList.h"
#include "SharedFileList.h"
#include "Kademlia/Kademlia/Kademlia.h"
#include "Kademlia/Kademlia/Search.h"
#include "Kademlia/Kademlia/SearchManager.h"
#include "Kademlia/Kademlia/UDPFirewallTester.h"
#include "Kademlia/routing/RoutingZone.h"
#include "Kademlia/Utils/UInt128.h"
#include "Kademlia/Net/KademliaUDPListener.h"
#include "Kademlia/Kademlia/Prefs.h"
#include "emuledlg.h"
#include "TransferDlg.h"
#include "ChatWnd.h"
#include "CxImage/xImage.h"
#include "PreviewDlg.h"
#include "Exceptions.h"
#include "ClientUDPSocket.h"
#include "shahashset.h"
#include "Log.h"
#include "CaptchaGenerator.h"
//>>> WiZaRd::ClientAnalyzer
#include "./Mod/ClientAnalyzer.h"
#include "Version.h"
//<<< WiZaRd::ClientAnalyzer
#include "./Mod/ModIconMapping.h" //>>> WiZaRd::ModIconMapper
#include "./Mod/NetF/PartStatus.h" //>>> WiZaRd::Sub-Chunk-Transfer [Netfinity]
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define URLINDICATOR L"http:|www.|.de |.net |.com |.org |.to |.tk |.cc |.fr |ftp:|ed2k:|https:|ftp.|.info|.biz|.uk|.eu|.es|.tv|.cn|.tw|.ws|.nu|.jp"
IMPLEMENT_DYNAMIC(CClientException, CException)
IMPLEMENT_DYNAMIC(CUpDownClient, CObject)
CUpDownClient::CUpDownClient(CClientReqSocket* sender)
{
Init();
socket = sender;
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
CAddress IP;
if (socket)
{
SOCKADDR_IN6 sockAddr = {0};
int nSockAddrLen = sizeof(sockAddr);
socket->GetPeerName((SOCKADDR*)&sockAddr, &nSockAddrLen);
IP.FromSA((SOCKADDR*)&sockAddr, nSockAddrLen);
//IP.Convert(CAddress::IPv4); // check if its a mapped v4 address done in SetIP
}
SetIP(IP);
m_bOpenIPv6 = false;
//<<< WiZaRd::IPv6 [Xanatos]
#else
if (socket)
{
SOCKADDR_IN sockAddr = {0};
int nSockAddrLen = sizeof(sockAddr);
socket->GetPeerName((SOCKADDR*)&sockAddr, &nSockAddrLen);
SetIP(sockAddr.sin_addr.S_un.S_addr);
}
else
SetIP(0);
#endif
}
CUpDownClient::CUpDownClient(CPartFile* in_reqfile, const uint16 in_port, const UINT in_userid, const UINT in_serverip, const uint16 in_serverport, const bool ed2kID)
{
//Converting to the HybridID system.. The ED2K system didn't take into account of IP address ending in 0..
//All IP addresses ending in 0 were assumed to be a lowID because of the calculations.
Init();
reqfile = in_reqfile;
m_nUserPort = in_port;
//If this is a ED2K source, check if it's a lowID.. If not, convert it to a HyrbidID.
//Else, it's already in hybrid form.
if (ed2kID && !IsLowID(in_userid))
m_nUserIDHybrid = ntohl(in_userid);
else
m_nUserIDHybrid = in_userid;
//If highID and ED2K source, incoming ID and IP are equal..
//If highID and Kad source, incoming IP needs ntohl for the IP
if (!HasLowID() && ed2kID)
#ifdef IPV6_SUPPORT
m_nConnectIP = CAddress(ntohl(in_userid)); //>>> WiZaRd::IPv6 [Xanatos]
#else
m_nConnectIP = in_userid;
#endif
else if (!HasLowID())
#ifdef IPV6_SUPPORT
m_nConnectIP = CAddress(in_userid); //>>> WiZaRd::IPv6 [Xanatos]
#else
m_nConnectIP = ntohl(in_userid);
#endif
m_dwServerIP = in_serverip;
m_nServerPort = in_serverport;
// #ifdef _DEBUG
// theApp.QueueLogLineEx(LOG_INFO, L"New client instance with ID: %u - ed2kID? %s - lowID? %s - hybridID: %u", in_userid, ed2kID ? GetResString(IDS_YES) : GetResString(IDS_NO), IsLowID(in_userid) ? GetResString(IDS_YES) : GetResString(IDS_NO), m_nUserIDHybrid);
// #endif
}
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
CUpDownClient::CUpDownClient(CPartFile* in_reqfile, const uint16 in_port, const CAddress& IP, const UINT in_serverip, const uint16 in_serverport, const bool /*ed2kID*/)
{
Init();
reqfile = in_reqfile;
m_nUserPort = in_port;
m_nUserIDHybrid = IP.ToIPv4();
m_nConnectIP = IP;
m_dwServerIP = in_serverip;
m_nServerPort = in_serverport;
// #ifdef _DEBUG
// theApp.QueueLogLineEx(LOG_INFO, L"New IPv6 client instance with IP: %u - ed2kID? %s - hybridID: %u", ipstr(IP), ed2kID ? GetResString(IDS_YES) : GetResString(IDS_NO), m_nUserIDHybrid);
// #endif
}
//<<< WiZaRd::IPv6 [Xanatos]
#endif
void CUpDownClient::Init()
{
reqfile = NULL;
socket = NULL;
m_iModIconIndex = MODMAP_NONE; //>>> WiZaRd::ModIconMapper
//>>> WiZaRd::ZZUL Upload [ZZ]
m_nCurQueueSessionUp = 0;
m_nCurSessionPayloadUp = 0;
m_addedPayloadQueueSession = 0;
m_bScheduledForRemoval = false;
m_bScheduledForRemovalWillKeepWaitingTimeIntact = false;
//<<< WiZaRd::ZZUL Upload [ZZ]
m_uiFailedUDPPacketsInARow = 0; //>>> WiZaRd::Detect UDP problem clients
m_abyUpPartStatusHidden = NULL; //>>> WiZaRd::Intelligent SOTN
//>>> WiZaRd::ClientAnalyzer
m_fAICHHashRequested = FALSE; //>>> Security
m_fSourceExchangeRequested = FALSE; //>>> Security
m_uiRealVersion = 0;
pAntiLeechData = NULL;
//<<< WiZaRd::ClientAnalyzer
//>>> WiZaRd::ICS [enkeyDEV]
m_abyIncPartStatus = NULL;
m_incompletepartVer = 0;
//<<< WiZaRd::ICS [enkeyDEV]
//>>> WiZaRd::Unsolicited PartStatus [Netfinity]
m_byFileRequestState = 0;
//<<< WiZaRd::Unsolicited PartStatus [Netfinity]
#ifdef ANTI_HIDEOS
m_abySeenPartStatus = NULL; //>>> WiZaRd::AntiHideOS [netfinity]
#endif
m_nChatstate = MS_NONE;
m_nKadState = KS_NONE;
m_nChatCaptchaState = CA_NONE;
m_nUploadState = US_NONE;
m_nDownloadState = DS_NONE;
m_SecureIdentState = IS_UNAVAILABLE;
m_nConnectingState = CCS_NONE;
credits = NULL;
m_nSumForAvgUpDataRate = 0;
//>>> WiZaRd::Fix for LowID slots only on connection [VQB]
//m_bAddNextConnect = false;
m_dwWouldHaveGottenUploadSlotIfNotLowIdTick = 0;
//<<< WiZaRd::Fix for LowID slots only on connection [VQB]
m_cShowDR = 0;
m_nUDPPort = 0;
m_nKadPort = 0;
m_nTransferredUp = 0;
m_cAsked = 0;
m_cDownAsked = 0;
m_nUpDatarate = 0;
m_pszUsername = 0;
m_nUserIDHybrid = 0;
m_dwServerIP = 0;
m_nServerPort = 0;
m_iFileListRequested = 0;
m_dwLastUpRequest = 0;
m_bEmuleProtocol = false;
m_bCompleteSource = false;
m_bFriendSlot = false;
m_bCommentDirty = false;
m_bReaskPending = false;
m_bUDPPending = false;
m_byEmuleVersion = 0;
m_nUserPort = 0;
//>>> WiZaRd::Sub-Chunk-Transfer [Netfinity]
m_pPartStatus = NULL;
m_pUpPartStatus = NULL;
m_nProtocolRevision = PROTOCOL_REVISION_0;
//m_nPartCount = 0;
//m_nUpPartCount = 0;
//m_abyPartStatus = 0;
//m_abyUpPartStatus = 0;
//<<< WiZaRd::Sub-Chunk-Transfer [Netfinity]
m_dwUploadTime = 0;
m_nTransferredDown = 0;
m_nDownDatarate = 0;
m_nDownDataRateMS = 0;
m_dwLastBlockReceived = 0;
m_byDataCompVer = 0;
m_byUDPVer = 0;
m_bySourceExchange1Ver = 0;
m_byAcceptCommentVer = 0;
m_byExtendedRequestsVer = 0;
m_nRemoteQueueRank = 0;
m_dwLastSourceRequest = 0;
m_dwLastSourceAnswer = 0;
m_dwLastAskedForSources = 0;
m_byCompatibleClient = 0;
m_nSourceFrom = SF_SERVER;
m_bIsHybrid = false;
m_bIsML=false;
m_Friend = NULL;
m_uFileRating=0;
(void)m_strFileComment;
m_fMessageFiltered = 0;
m_fIsSpammer = 0;
m_cMessagesReceived = 0;
m_cMessagesSent = 0;
m_nCurSessionUp = 0;
m_nCurSessionDown = 0;
m_nCurSessionPayloadDown = 0;
m_nSumForAvgDownDataRate = 0;
m_clientSoft=SO_UNKNOWN;
m_bRemoteQueueFull = false;
md4clr(m_achUserHash);
SetBuddyID(NULL);
m_nBuddyIP = 0;
m_nBuddyPort = 0;
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
CAddress IP;
SetIP(IP);
m_bOpenIPv6 = false;
//<<< WiZaRd::IPv6 [Xanatos]
#else
SetIP(0);
#endif
m_fHashsetRequestingAICH = 0;
m_fHashsetRequestingMD4 = 0;
m_fSharedDirectories = 0;
m_fSentCancelTransfer = 0;
m_nClientVersion = 0;
m_lastRefreshedDLDisplay = 0;
m_dwDownStartTime = 0;
m_nLastBlockOffset = (uint64)-1;
m_bUnicodeSupport = false;
//m_dwLastSignatureIP = 0; //>>> WiZaRd::IPv6 [Xanatos]
m_bySupportSecIdent = 0;
m_byInfopacketsReceived = IP_NONE;
m_lastPartAsked = (uint16)-1;
m_nUpCompleteSourcesCount = _UI16_MAX; //>>> WiZaRd::Use client info only if sent!
m_fSupportsPreview = 0;
m_fPreviewReqPending = 0;
m_fPreviewAnsPending = 0;
m_bTransferredDownMini = false;
m_addedPayloadQueueSession = 0;
m_nCurQueueSessionPayloadUp = 0; // PENDING: Is this necessary? ResetSessionUp()...
m_lastRefreshedULDisplay = ::GetTickCount();
//>>> WiZaRd::More GPLEvilDoers
m_bGPLEvilDoerNick = false;
m_bGPLEvilDoerMod = false;
//<<< WiZaRd::More GPLEvilDoers
m_bHelloAnswerPending = false;
m_fNoViewSharedFiles = 0;
m_bMultiPacket = 0;
md4clr(requpfileid);
m_nTotalUDPPackets = 0;
m_nFailedUDPPackets = 0;
m_nUrlStartPos = (uint64)-1;
m_fNeedOurPublicIP = 0;
m_random_update_wait = (UINT)(rand()/(RAND_MAX/1000));
m_bSourceExchangeSwapped = false; // ZZ:DownloadManager
m_dwLastTriedToConnect = ::GetTickCount()-20*60*1000; // ZZ:DownloadManager
m_fQueueRankPending = 0;
m_fUnaskQueueRankRecv = 0;
m_fFailedFileIdReqs = 0;
m_slotNumber = 0;
lastSwapForSourceExchangeTick = 0;
m_pReqFileAICHHash = NULL;
m_fSupportsAICH = 0;
m_fAICHRequested = FALSE;
m_byKadVersion = 0;
SetLastBuddyPingPongTime();
m_fSentOutOfPartReqs = 0;
m_fSupportsLargeFiles = 0;
m_fExtMultiPacket = 0;
m_fRequestsCryptLayer = 0;
m_fSupportsCryptLayer = 0;
m_fRequiresCryptLayer = 0;
m_fSupportsSourceEx2 = 0;
m_fSupportsCaptcha = 0;
m_fDirectUDPCallback = 0;
m_cCaptchasSent = 0;
m_fSupportsFileIdent = 0;
//>>> WiZaRd::ModProt
m_fSupportsModProt = 0;
m_bSupportsLowIDUDPPing = false; //>>> LowID UDP Ping Support
//<<< WiZaRd::ModProt
#ifdef IPV6_SUPPORT
m_fSupportsIPv6 = 0; //>>> WiZaRd::IPv6 [Xanatos]
#endif
#ifdef NAT_TRAVERSAL
m_fSupportsNatTraversal = 0; //>>> WiZaRd::NatTraversal [Xanatos]
#endif
m_fSupportsExtendedXS = 0; //>>> WiZaRd::ExtendedXS [Xanatos]
m_iQueueRankDifference = 0; //>>> WiZaRd::QR History
}
CUpDownClient::~CUpDownClient()
{
//>>> WiZaRd::ICS [enkeyDEV]
delete[] m_abyIncPartStatus;
m_abyIncPartStatus = NULL;
//<<< WiZaRd::ICS [enkeyDEV]
#ifdef ANTI_HIDEOS
//>>> WiZaRd::AntiHideOS [netfinity]
delete[] m_abySeenPartStatus;
m_abySeenPartStatus = NULL;
//<<< WiZaRd::AntiHideOS [netfinity]
#endif
//>>> WiZaRd::Intelligent SOTN
delete[] m_abyUpPartStatusHidden;
m_abyUpPartStatusHidden = NULL;
//<<< WiZaRd::Intelligent SOTN
//>>> WiZaRd::ClientAnalyzer
if (pAntiLeechData)
theApp.antileechlist->ResetParent(this);
//<<< WiZaRd::ClientAnalyzer
if (IsAICHReqPending())
{
m_fAICHRequested = FALSE;
CAICHRecoveryHashSet::ClientAICHRequestFailed(this);
}
if (GetFriend() != NULL)
{
if (GetFriend()->IsTryingToConnect())
GetFriend()->UpdateFriendConnectionState(FCR_DELETED);
m_Friend->SetLinkedClient(NULL);
}
ASSERT(m_nConnectingState == CCS_NONE || !theApp.emuledlg->IsRunning());
theApp.clientlist->RemoveClient(this, L"Destructing client object");
if (socket)
{
socket->client = 0;
socket->Safe_Delete();
}
free(m_pszUsername);
//>>> WiZaRd::Sub-Chunk-Transfer [Netfinity]
delete m_pPartStatus;
m_pPartStatus = NULL;
delete m_pUpPartStatus;
m_pUpPartStatus = NULL;
//delete[] m_abyPartStatus;
//m_abyPartStatus = NULL;
//delete[] m_abyUpPartStatus;
//m_abyUpPartStatus = NULL;
//<<< WiZaRd::Sub-Chunk-Transfer [Netfinity]
ClearUploadBlockRequests();
for (POSITION pos = m_DownloadBlocks_list.GetHeadPosition(); pos != 0;)
delete m_DownloadBlocks_list.GetNext(pos);
for (POSITION pos = m_RequestedFiles_list.GetHeadPosition(); pos != 0;)
delete m_RequestedFiles_list.GetNext(pos);
for (POSITION pos = m_PendingBlocks_list.GetHeadPosition(); pos != 0;)
{
Pending_Block_Struct *pending = m_PendingBlocks_list.GetNext(pos);
delete pending->block;
// Not always allocated
if (pending->zStream)
{
inflateEnd(pending->zStream);
delete pending->zStream;
}
delete pending;
}
for (POSITION pos = m_WaitingPackets_list.GetHeadPosition(); pos != 0;)
delete m_WaitingPackets_list.GetNext(pos);
DEBUG_ONLY(theApp.listensocket->Debug_ClientDeleted(this));
SetUploadFileID(NULL);
m_fileReaskTimes.RemoveAll(); // ZZ:DownloadManager (one resk timestamp for each file)
delete m_pReqFileAICHHash;
}
void CUpDownClient::ClearHelloProperties()
{
m_uiRealVersion = 0; //>>> WiZaRd::ClientAnalyzer
m_nUDPPort = 0;
m_byUDPVer = 0;
m_byDataCompVer = 0;
m_byEmuleVersion = 0;
m_bySourceExchange1Ver = 0;
m_byAcceptCommentVer = 0;
m_byExtendedRequestsVer = 0;
m_byCompatibleClient = 0;
m_nKadPort = 0;
m_bySupportSecIdent = 0;
m_fSupportsPreview = 0;
m_nClientVersion = 0;
m_fSharedDirectories = 0;
m_bMultiPacket = 0;
m_byKadVersion = 0;
m_fSupportsLargeFiles = 0;
m_fExtMultiPacket = 0;
m_fRequestsCryptLayer = 0;
m_fSupportsCryptLayer = 0;
m_fRequiresCryptLayer = 0;
m_fSupportsSourceEx2 = 0;
m_fSupportsCaptcha = 0;
m_fDirectUDPCallback = 0;
m_fSupportsFileIdent = 0;
m_strModVersion.Empty(); //>>> WiZaRd::Missing code?
m_incompletepartVer = 0; //>>> WiZaRd::ICS [enkeyDEV]
m_nProtocolRevision = PROTOCOL_REVISION_0; //>>> WiZaRd::Sub-Chunk-Transfer [Netfinity]
//>>> WiZaRd::ModProt
//Clear all mod flags here, too
m_fSupportsModProt = 0;
m_bSupportsLowIDUDPPing = false; //>>> LowID UDP Ping Support
//<<< WiZaRd::ModProt
}
bool CUpDownClient::ProcessHelloPacket(const uchar* pachPacket, UINT nSize)
{
CSafeMemFile data(pachPacket, nSize);
const uint8 hashSize = data.ReadUInt8(); // read size of userhash
if (hashSize != 16)
{
CString strMessage = L"";
strMessage.Format(L"Client %s sent wrong hashsize (%u) in hello packet!", DbgGetClientInfo(), hashSize);
throw strMessage;
}
// reset all client properties; a client may not send a particular emule tag any longer
ClearHelloProperties();
return ProcessHelloTypePacket(&data);
}
bool CUpDownClient::ProcessHelloAnswer(const uchar* pachPacket, UINT nSize)
{
CSafeMemFile data(pachPacket, nSize);
bool bIsMule = ProcessHelloTypePacket(&data);
m_bHelloAnswerPending = false;
return bIsMule;
}
bool CUpDownClient::ProcessHelloTypePacket(CSafeMemFile* data)
{
bool bDbgInfo = thePrefs.GetUseDebugDevice();
m_strHelloInfo.Empty();
// clear hello properties which can be changed _only_ on receiving OP_Hello/OP_HelloAnswer
m_bIsHybrid = false;
m_bIsML = false;
m_fNoViewSharedFiles = 0;
m_bUnicodeSupport = false;
data->ReadHash16(m_achUserHash);
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"Hash=%s (%s)", md4str(m_achUserHash), DbgGetHashTypeString(m_achUserHash));
m_nUserIDHybrid = data->ReadUInt32();
// #ifdef _DEBUG
// theApp.QueueLogLineEx(LOG_INFO, L"Read hybridID from hello: %u (%s)", m_nUserIDHybrid, DbgGetClientInfo());
// #endif
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L" UserID=%u (%s)", m_nUserIDHybrid, ipstr(m_nUserIDHybrid));
uint16 nUserPort = data->ReadUInt16(); // hmm clientport is sent twice - why?
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L" Port=%u", nUserPort);
DWORD dwEmuleTags = 0;
bool bPrTag = false;
UINT tagcount = data->ReadUInt32();
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L" Tags=%u", tagcount);
//>>> WiZaRd::ClientAnalyzer
bool bNick = false;
bool bMod = false;
//>>> zz_fly::Bad Shareaza detection
bool bWasUDPPortSent = false;
bool bIsBadShareaza = false;
//<<< zz_fly::Bad Shareaza detection
//<<< WiZaRd::ClientAnalyzer
for (UINT i = 0; i < tagcount; i++)
{
CTag temptag(data, true);
switch (temptag.GetNameID())
{
case CT_NAME:
if (temptag.IsStr())
{
free(m_pszUsername);
m_pszUsername = _tcsdup(temptag.GetStr());
if (bDbgInfo)
{
if (m_pszUsername) //filter username for bad chars
{
TCHAR* psz = m_pszUsername;
while (*psz != L'\0')
{
if (*psz == L'\n' || *psz == L'\r')
*psz = L' ';
psz++;
}
}
m_strHelloInfo.AppendFormat(L"\n Name='%s'", m_pszUsername);
}
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
bNick = true; //>>> WiZaRd::ClientAnalyzer
break;
case CT_VERSION:
if (temptag.IsInt())
{
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n Version=%u", temptag.GetInt());
m_nClientVersion = temptag.GetInt();
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
case CT_PORT:
if (temptag.IsInt())
{
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n Port=%u", temptag.GetInt());
nUserPort = (uint16)temptag.GetInt();
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
case CT_MOD_VERSION:
if (temptag.IsStr())
m_strModVersion = temptag.GetStr();
else if (temptag.IsInt())
m_strModVersion.Format(L"ModID=%u", temptag.GetInt());
else
m_strModVersion = L"ModID=<Unknown>";
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ModID=%s", m_strModVersion);
bMod = true; //>>> WiZaRd::ClientAnalyzer
break;
case CT_EMULE_UDPPORTS:
// 16 KAD Port
// 16 UDP Port
if (temptag.IsInt())
{
m_nKadPort = (uint16)(temptag.GetInt() >> 16);
m_nUDPPort = (uint16)temptag.GetInt();
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n KadPort=%u UDPPort=%u", m_nKadPort, m_nUDPPort);
dwEmuleTags |= 1;
bWasUDPPortSent = true; //>>> WiZaRd::ClientAnalyzer //>>> zz_fly::Bad Shareaza detection
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
case CT_EMULE_BUDDYUDP:
// 16 --Reserved for future use--
// 16 BUDDY Port
if (temptag.IsInt())
{
m_nBuddyPort = (uint16)temptag.GetInt();
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n BuddyPort=%u", m_nBuddyPort);
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
case CT_EMULE_BUDDYIP:
// 32 BUDDY IP
if (temptag.IsInt())
{
m_nBuddyIP = temptag.GetInt();
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n BuddyIP=%s", ipstr(m_nBuddyIP));
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
#ifdef NAT_TRAVERSAL
//>>> WiZaRd::NatTraversal [Xanatos]
case CT_EMULE_BUDDYID:
if (temptag.IsHash())
{
SetBuddyID(temptag.GetHash());
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n BuddyID=%s", md4str(temptag.GetHash()));
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
//<<< WiZaRd::NatTraversal [Xanatos]
#endif
case CT_EMULE_MISCOPTIONS1:
// 3 AICH Version (0 = not supported)
// 1 Unicode
// 4 UDP version
// 4 Data compression version
// 4 Secure Ident
// 4 Source Exchange - deprecated
// 4 Ext. Requests
// 4 Comments
// 1 PeerChache supported
// 1 No 'View Shared Files' supported
// 1 MultiPacket - deprecated with FileIdentifiers/MultipacketExt2
// 1 Preview
if (temptag.IsInt())
{
m_fSupportsAICH = (temptag.GetInt() >> 29) & 0x07;
m_bUnicodeSupport = (temptag.GetInt() >> 28) & 0x01;
m_byUDPVer = (uint8)((temptag.GetInt() >> 24) & 0x0f);
m_byDataCompVer = (uint8)((temptag.GetInt() >> 20) & 0x0f);
m_bySupportSecIdent = (uint8)((temptag.GetInt() >> 16) & 0x0f);
m_bySourceExchange1Ver = (uint8)((temptag.GetInt() >> 12) & 0x0f);
m_byExtendedRequestsVer = (uint8)((temptag.GetInt() >> 8) & 0x0f);
m_byAcceptCommentVer = (uint8)((temptag.GetInt() >> 4) & 0x0f);
UINT m_fPeerCache = (temptag.GetInt() >> 3) & 0x01;
m_fNoViewSharedFiles = (temptag.GetInt() >> 2) & 0x01;
m_bMultiPacket = (temptag.GetInt() >> 1) & 0x01;
m_fSupportsPreview = (temptag.GetInt() >> 0) & 0x01;
dwEmuleTags |= 2;
if (bDbgInfo)
{
m_strHelloInfo.AppendFormat(L"\n PeerCache=%u UDPVer=%u DataComp=%u SecIdent=%u SrcExchg=%u"
L" ExtReq=%u Commnt=%u Preview=%u NoViewFiles=%u Unicode=%u",
m_fPeerCache, m_byUDPVer, m_byDataCompVer, m_bySupportSecIdent, m_bySourceExchange1Ver,
m_byExtendedRequestsVer, m_byAcceptCommentVer, m_fSupportsPreview, m_fNoViewSharedFiles, m_bUnicodeSupport);
}
//>>> WiZaRd::ClientAnalyzer
//>>> zz_fly::Bad Shareaza detection
if (!bWasUDPPortSent)
bIsBadShareaza = true;
//<<< zz_fly::Bad Shareaza detection
//<<< WiZaRd::ClientAnalyzer
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
case CT_EMULE_MISCOPTIONS2:
// 18 Reserved
// 1 Supports new FileIdentifiers/MultipacketExt2
// 1 Direct UDP Callback supported and available
// 1 Supports ChatCaptchas
// 1 Supports SourceExachnge2 Packets, ignores SX1 Packet Version
// 1 Requires CryptLayer
// 1 Requests CryptLayer
// 1 Supports CryptLayer
// 1 Reserved (ModBit)
// 1 Ext Multipacket (Hash+Size instead of Hash) - deprecated with FileIdentifiers/MultipacketExt2
// 1 Large Files (includes support for 64bit tags)
// 4 Kad Version - will go up to version 15 only (may need to add another field at some point in the future)
if (temptag.IsInt())
{
m_fSupportsFileIdent = (temptag.GetInt() >> 13) & 0x01;
m_fDirectUDPCallback = (temptag.GetInt() >> 12) & 0x01;
m_fSupportsCaptcha = (temptag.GetInt() >> 11) & 0x01;
m_fSupportsSourceEx2 = (temptag.GetInt() >> 10) & 0x01;
m_fRequiresCryptLayer = (temptag.GetInt() >> 9) & 0x01;
m_fRequestsCryptLayer = (temptag.GetInt() >> 8) & 0x01;
m_fSupportsCryptLayer = (temptag.GetInt() >> 7) & 0x01;
//>>> WiZaRd::ModProt
// reserved 1
m_fSupportsModProt = (temptag.GetInt() >> 6) & 0x01;
//<<< WiZaRd::ModProt
m_fExtMultiPacket = (temptag.GetInt() >> 5) & 0x01;
m_fSupportsLargeFiles = (temptag.GetInt() >> 4) & 0x01;
m_byKadVersion = (uint8)((temptag.GetInt() >> 0) & 0x0f);
dwEmuleTags |= 8;
if (bDbgInfo)
//>>> WiZaRd::ModProt
m_strHelloInfo.AppendFormat(L"\n KadVersion=%u, LargeFiles=%u ExtMultiPacket=%u CryptLayerSupport=%u CryptLayerRequest=%u CryptLayerRequires=%u m_fSupportsSourceEx2=%u SupportsCaptcha=%u DirectUDPCallback=%u m_fSupportsModProt=%u", m_byKadVersion, m_fSupportsLargeFiles, m_fExtMultiPacket, m_fSupportsCryptLayer, m_fRequestsCryptLayer, m_fRequiresCryptLayer, m_fSupportsSourceEx2, m_fSupportsCaptcha, m_fDirectUDPCallback, m_fSupportsModProt);
//m_strHelloInfo.AppendFormat(L"\n KadVersion=%u, LargeFiles=%u ExtMultiPacket=%u CryptLayerSupport=%u CryptLayerRequest=%u CryptLayerRequires=%u SupportsSourceEx2=%u SupportsCaptcha=%u DirectUDPCallback=%u", m_byKadVersion, m_fSupportsLargeFiles, m_fExtMultiPacket, m_fSupportsCryptLayer, m_fRequestsCryptLayer, m_fRequiresCryptLayer, m_fSupportsSourceEx2, m_fSupportsCaptcha, m_fDirectUDPCallback);
//<<< WiZaRd::ModProt
m_fRequestsCryptLayer &= m_fSupportsCryptLayer;
m_fRequiresCryptLayer &= m_fRequestsCryptLayer;
//>>> WiZaRd::ClientAnalyzer
//>>> zz_fly::Bad Shareaza detection
if (!bWasUDPPortSent)
bIsBadShareaza = true;
//<<< zz_fly::Bad Shareaza detection
//<<< WiZaRd::ClientAnalyzer
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
case CT_EMULE_VERSION:
// 8 Compatible Client ID
// 7 Mjr Version (Doesn't really matter..)
// 7 Min Version (Only need 0-99)
// 3 Upd Version (Only need 0-5)
// 7 Bld Version (Only need 0-99) -- currently not used
if (temptag.IsInt())
{
m_byCompatibleClient = (uint8)((temptag.GetInt() >> 24));
m_uiRealVersion = temptag.GetInt(); //>>> WiZaRd::ClientAnalyzer
m_nClientVersion = temptag.GetInt() & 0x00ffffff;
m_byEmuleVersion = 0x99;
m_fSharedDirectories = 1;
dwEmuleTags |= 4;
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ClientVer=%u.%u.%u.%u Comptbl=%u", (m_nClientVersion >> 17) & 0x7f, (m_nClientVersion >> 10) & 0x7f, (m_nClientVersion >> 7) & 0x07, m_nClientVersion & 0x7f, m_byCompatibleClient);
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
//>>> WiZaRd::ICS [enkeyDEV]
case ET_INCOMPLETEPARTS:
if (temptag.IsInt())
{
m_incompletepartVer = (uint8)temptag.GetInt();
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n IncVer=%u", m_incompletepartVer);
}
break;
//flow over
//<<< WiZaRd::ICS [enkeyDEV]
//>>> WiZaRd::IPv6 [Xanatos]
#ifdef IPV6_SUPPORT
case CT_NEOMULE_YOUR_IP:
if (temptag.IsInt())
{
CAddress UserIPv4(_ntohl(temptag.GetInt()));
// IPv6-TODO: do something with it
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n YourIPv4=%s", ipstr(UserIPv4));
}
else if (temptag.IsHash())
{
CAddress UserIPv6(temptag.GetHash());
// IPv6-TODO: do something with it
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n YourIPv6=%s", ipstr(UserIPv6));
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
case CT_NEOMULE_IP_V6:
if (temptag.IsHash())
{
SetIPv6(CAddress(temptag.GetHash()));
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n IPv6=%s", ipstr(m_UserIPv6));
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
break;
#endif
//<<< WiZaRd::IPv6 [Xanatos]
//>>> WiZaRd::ModProt
case CT_NEOMULE_MISCOPTIONS:
if (temptag.IsInt())
{
#ifdef IPV6_SUPPORT
m_fSupportsIPv6 = (temptag.GetInt() >> 2) & 0x01; //>>> WiZaRd::IPv6 [Xanatos]
#else
UINT m_fSupportsIPv6 = (temptag.GetInt() >> 2) & 0x01; //>>> WiZaRd::IPv6 [Xanatos]
#endif
#ifdef NAT_TRAVERSAL
m_fSupportsNatTraversal = (temptag.GetInt() >> 1) & 0x01; //>>> WiZaRd::NatTraversal [Xanatos]
#elif defined(_DEBUG) || defined(USE_DEBUG_DEVICE)
UINT m_fSupportsNatTraversal = (temptag.GetInt() >> 1) & 0x01; //>>> WiZaRd::NatTraversal [Xanatos]
#endif
m_fSupportsExtendedXS = (temptag.GetInt() >> 0) & 0x01; //>>> WiZaRd::ExtendedXS [Xanatos]
#if defined(_DEBUG) || defined(USE_DEBUG_DEVICE)
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n IPv6=%u NatTraversal=%u ExtendedXS=%u", m_fSupportsIPv6, m_fSupportsNatTraversal, m_fSupportsExtendedXS);
#endif
}
#if defined(_DEBUG) || defined(USE_DEBUG_DEVICE)
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
#endif
break;
//<<< WiZaRd::ModProt
default:
// Since eDonkeyHybrid 1.3 is no longer sending the additional Int32 at the end of the Hello packet,
// we use the "pr=1" tag to determine them.
if (temptag.GetName() && temptag.GetName()[0]=='p' && temptag.GetName()[1]=='r')
{
//>>> WiZaRd::Sub-Chunk-Transfer [Netfinity]
if (temptag.IsInt())
{
m_nProtocolRevision = temptag.GetInt();
m_strHelloInfo.AppendFormat(L"\n ProtocolRevision=%u", m_nProtocolRevision);
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkType=%s", temptag.GetFullInfo());
//<<< WiZaRd::Sub-Chunk-Transfer [Netfinity]
bPrTag = true;
}
else if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***UnkTag=%s", temptag.GetFullInfo());
}
}
m_nUserPort = nUserPort;
m_dwServerIP = data->ReadUInt32();
m_nServerPort = data->ReadUInt16();
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n Server=%s:%u", ipstr(m_dwServerIP), m_nServerPort);
// Check for additional data in Hello packet to determine client's software version.
//
// *) eDonkeyHybrid 0.40 - 1.2 sends an additional Int32. (Since 1.3 they don't send it any longer.)
// *) MLdonkey sends an additional Int32
//
if (data->GetLength() - data->GetPosition() == sizeof(UINT))
{
UINT test = data->ReadUInt32();
if (test == 'KDLM')
{
m_bIsML = true;
if (bDbgInfo)
m_strHelloInfo += L"\n ***AddData: \"MLDK\"";
}
else
{
m_bIsHybrid = true;
if (bDbgInfo)
m_strHelloInfo.AppendFormat(L"\n ***AddData: UINT=%u (0x%08x)", test, test);
}
}
else if (bDbgInfo && data->GetPosition() < data->GetLength())
{
UINT uAddHelloDataSize = (UINT)(data->GetLength() - data->GetPosition());
if (uAddHelloDataSize == sizeof(UINT))
{
DWORD dwAddHelloInt32 = data->ReadUInt32();
m_strHelloInfo.AppendFormat(L"\n ***AddData: UINT=%u (0x%08x)", dwAddHelloInt32, dwAddHelloInt32);
}
else if (uAddHelloDataSize == sizeof(UINT)+sizeof(uint16))
{
DWORD dwAddHelloInt32 = data->ReadUInt32();
WORD w = data->ReadUInt16();
m_strHelloInfo.AppendFormat(L"\n ***AddData: UINT=%u (0x%08x), uint16=%u (0x%04x)", dwAddHelloInt32, dwAddHelloInt32, w, w);
}
else
m_strHelloInfo.AppendFormat(L"\n ***AddData: %u bytes", uAddHelloDataSize);
}
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
CAddress IP;
SOCKADDR_IN6 sockAddr = {0};
int nSockAddrLen = sizeof(sockAddr);
socket->GetPeerName((SOCKADDR*)&sockAddr, &nSockAddrLen);
IP.FromSA((SOCKADDR*)&sockAddr, nSockAddrLen);
//IP.Convert(CAddress::IPv4); // check if its a maped v4 address done in SetIP
SetIP(IP);
//<<< WiZaRd::IPv6 [Xanatos]
#else
SOCKADDR_IN sockAddr = {0};
int nSockAddrLen = sizeof(sockAddr);
socket->GetPeerName((SOCKADDR*)&sockAddr, &nSockAddrLen);
SetIP(sockAddr.sin_addr.S_un.S_addr);
#endif
//(a)If this is a highID user, store the ID in the Hybrid format.
//(b)Some older clients will not send a ID, these client are HighID users that are not connected to a server.
//(c)Kad users with a *.*.*.0 IPs will look like a lowID user they are actually a highID user.. They can be detected easily
//because they will send a ID that is the same as their IP.
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
if (!HasLowID() || m_nUserIDHybrid == 0 || m_nUserIDHybrid == _ntohl(GetIP().ToIPv4()))
m_nUserIDHybrid = GetIP().ToIPv4();
//<<< WiZaRd::IPv6 [Xanatos]
#else
if (!HasLowID() || m_nUserIDHybrid == 0 || m_nUserIDHybrid == GetIP())
m_nUserIDHybrid = ntohl(GetIP());
#endif
CClientCredits* pFoundCredits = theApp.clientcredits->GetCredit(m_achUserHash);
if (credits == NULL)
{
credits = pFoundCredits;
#ifdef IPV6_SUPPORT
//>>> WiZaRd::IPv6 [Xanatos]
if (GetConnectIP().GetType() == CAddress::IPv4 // IPv6-TODO: Add IPv6 ban list
&& !theApp.clientlist->ComparePriorUserhash(_ntohl(GetConnectIP().ToIPv4()), m_nUserPort, pFoundCredits))
//<<< WiZaRd::IPv6 [Xanatos]
#else
if (!theApp.clientlist->ComparePriorUserhash(GetConnectIP(), m_nUserPort, pFoundCredits))
#endif
{
if (thePrefs.GetLogBannedClients())
AddDebugLogLine(false, L"Clients: %s (%s), Banreason: Userhash changed (Found in TrackedClientsList)", GetUserName(), ipstr(GetConnectIP()));
Ban();
}
}
else if (credits != pFoundCredits)
{
// userhash change ok, however two hours "waittime" before it can be used
credits = pFoundCredits;
if (thePrefs.GetLogBannedClients())
AddDebugLogLine(false, L"Clients: %s (%s), Banreason: Userhash changed", GetUserName(), ipstr(GetConnectIP()));
Ban();
}
if (GetFriend() != NULL && GetFriend()->HasUserhash() && md4cmp(GetFriend()->m_abyUserhash, m_achUserHash) != 0)
{
// this isnt our friend anymore and it will be removed/replaced, tell our friendobject about it
if (GetFriend()->IsTryingToConnect())
GetFriend()->UpdateFriendConnectionState(FCR_USERHASHFAILED); // this will remove our linked friend
else
GetFriend()->SetLinkedClient(NULL);
}
// do not replace friendobjects which have no userhash, but the fitting ip with another friend object with the
// fitting userhash (both objects would fit to this instance), as this could lead to unwanted results
if (GetFriend() == NULL || GetFriend()->HasUserhash() || GetFriend()->m_dwLastUsedIP != GetConnectIP()
|| GetFriend()->m_nLastUsedPort != GetUserPort())
{
if ((m_Friend = theApp.friendlist->SearchFriend(m_achUserHash, GetConnectIP(), m_nUserPort)) != NULL)
{
// Link the friend to that client
m_Friend->SetLinkedClient(this);
}
else
{
// avoid that an unwanted client instance keeps a friend slot
SetFriendSlot(false);
}
}
else
{
// however, copy over our userhash in this case
md4cpy(GetFriend()->m_abyUserhash, m_achUserHash);
}