forked from bitcoin/bitcoin
-
Notifications
You must be signed in to change notification settings - Fork 0
/
net.cpp
1602 lines (1371 loc) · 51.3 KB
/
net.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
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#include "headers.h"
#ifdef USE_UPNP
#include <miniupnpc/miniwget.h>
#include <miniupnpc/miniupnpc.h>
#include <miniupnpc/upnpcommands.h>
#include <miniupnpc/upnperrors.h>
#endif
static const int MAX_OUTBOUND_CONNECTIONS = 8;
void ThreadMessageHandler2(void* parg);
void ThreadSocketHandler2(void* parg);
void ThreadOpenConnections2(void* parg);
#ifdef USE_UPNP
void ThreadMapPort2(void* parg);
#endif
bool OpenNetworkConnection(const CAddress& addrConnect);
//
// Global state variables
//
bool fClient = false;
uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
CAddress addrLocalHost(0, 0, nLocalServices);
CNode* pnodeLocalHost = NULL;
uint64 nLocalHostNonce = 0;
array<int, 10> vnThreadsRunning;
SOCKET hListenSocket = INVALID_SOCKET;
vector<CNode*> vNodes;
CCriticalSection cs_vNodes;
map<vector<unsigned char>, CAddress> mapAddresses;
CCriticalSection cs_mapAddresses;
map<CInv, CDataStream> mapRelay;
deque<pair<int64, CInv> > vRelayExpiration;
CCriticalSection cs_mapRelay;
map<CInv, int64> mapAlreadyAskedFor;
// Settings
int fUseProxy = false;
CAddress addrProxy("127.0.0.1:9050");
void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd)
{
// Filter out duplicate requests
if (pindexBegin == pindexLastGetBlocksBegin && hashEnd == hashLastGetBlocksEnd)
return;
pindexLastGetBlocksBegin = pindexBegin;
hashLastGetBlocksEnd = hashEnd;
PushMessage("getblocks", CBlockLocator(pindexBegin), hashEnd);
}
bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet)
{
hSocketRet = INVALID_SOCKET;
SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (hSocket == INVALID_SOCKET)
return false;
#ifdef BSD
int set = 1;
setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
#endif
bool fRoutable = !(addrConnect.GetByte(3) == 10 || (addrConnect.GetByte(3) == 192 && addrConnect.GetByte(2) == 168));
bool fProxy = (fUseProxy && fRoutable);
struct sockaddr_in sockaddr = (fProxy ? addrProxy.GetSockAddr() : addrConnect.GetSockAddr());
if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
{
closesocket(hSocket);
return false;
}
if (fProxy)
{
printf("proxy connecting %s\n", addrConnect.ToStringLog().c_str());
char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
memcpy(pszSocks4IP + 2, &addrConnect.port, 2);
memcpy(pszSocks4IP + 4, &addrConnect.ip, 4);
char* pszSocks4 = pszSocks4IP;
int nSize = sizeof(pszSocks4IP);
int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
if (ret != nSize)
{
closesocket(hSocket);
return error("Error sending to proxy");
}
char pchRet[8];
if (recv(hSocket, pchRet, 8, 0) != 8)
{
closesocket(hSocket);
return error("Error reading proxy response");
}
if (pchRet[1] != 0x5a)
{
closesocket(hSocket);
if (pchRet[1] != 0x5b)
printf("ERROR: Proxy returned error %d\n", pchRet[1]);
return false;
}
printf("proxy connected %s\n", addrConnect.ToStringLog().c_str());
}
hSocketRet = hSocket;
return true;
}
bool GetMyExternalIP2(const CAddress& addrConnect, const char* pszGet, const char* pszKeyword, unsigned int& ipRet)
{
SOCKET hSocket;
if (!ConnectSocket(addrConnect, hSocket))
return error("GetMyExternalIP() : connection to %s failed", addrConnect.ToString().c_str());
send(hSocket, pszGet, strlen(pszGet), MSG_NOSIGNAL);
string strLine;
while (RecvLine(hSocket, strLine))
{
if (strLine.empty()) // HTTP response is separated from headers by blank line
{
loop
{
if (!RecvLine(hSocket, strLine))
{
closesocket(hSocket);
return false;
}
if (pszKeyword == NULL)
break;
if (strLine.find(pszKeyword) != -1)
{
strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword));
break;
}
}
closesocket(hSocket);
if (strLine.find("<") != -1)
strLine = strLine.substr(0, strLine.find("<"));
strLine = strLine.substr(strspn(strLine.c_str(), " \t\n\r"));
while (strLine.size() > 0 && isspace(strLine[strLine.size()-1]))
strLine.resize(strLine.size()-1);
CAddress addr(strLine.c_str());
printf("GetMyExternalIP() received [%s] %s\n", strLine.c_str(), addr.ToString().c_str());
if (addr.ip == 0 || addr.ip == INADDR_NONE || !addr.IsRoutable())
return false;
ipRet = addr.ip;
return true;
}
}
closesocket(hSocket);
return error("GetMyExternalIP() : connection closed");
}
// We now get our external IP from the IRC server first and only use this as a backup
bool GetMyExternalIP(unsigned int& ipRet)
{
CAddress addrConnect;
const char* pszGet;
const char* pszKeyword;
if (fUseProxy)
return false;
for (int nLookup = 0; nLookup <= 1; nLookup++)
for (int nHost = 1; nHost <= 2; nHost++)
{
// We should be phasing out our use of sites like these. If we need
// replacements, we should ask for volunteers to put this simple
// php file on their webserver that prints the client IP:
// <?php echo $_SERVER["REMOTE_ADDR"]; ?>
if (nHost == 1)
{
addrConnect = CAddress("91.198.22.70:80"); // checkip.dyndns.org
if (nLookup == 1)
{
struct hostent* phostent = gethostbyname("checkip.dyndns.org");
if (phostent && phostent->h_addr_list && phostent->h_addr_list[0])
addrConnect = CAddress(*(u_long*)phostent->h_addr_list[0], htons(80));
}
pszGet = "GET / HTTP/1.1\r\n"
"Host: checkip.dyndns.org\r\n"
"User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
"Connection: close\r\n"
"\r\n";
pszKeyword = "Address:";
}
else if (nHost == 2)
{
addrConnect = CAddress("74.208.43.192:80"); // www.showmyip.com
if (nLookup == 1)
{
struct hostent* phostent = gethostbyname("www.showmyip.com");
if (phostent && phostent->h_addr_list && phostent->h_addr_list[0])
addrConnect = CAddress(*(u_long*)phostent->h_addr_list[0], htons(80));
}
pszGet = "GET /simple/ HTTP/1.1\r\n"
"Host: www.showmyip.com\r\n"
"User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
"Connection: close\r\n"
"\r\n";
pszKeyword = NULL; // Returns just IP address
}
if (GetMyExternalIP2(addrConnect, pszGet, pszKeyword, ipRet))
return true;
}
return false;
}
void ThreadGetMyExternalIP(void* parg)
{
// Wait for IRC to get it first
if (!GetBoolArg("-noirc"))
{
for (int i = 0; i < 2 * 60; i++)
{
Sleep(1000);
if (fGotExternalIP || fShutdown)
return;
}
}
// Fallback in case IRC fails to get it
if (GetMyExternalIP(addrLocalHost.ip))
{
printf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP().c_str());
if (addrLocalHost.IsRoutable())
{
// If we already connected to a few before we had our IP, go back and addr them.
// setAddrKnown automatically filters any duplicate sends.
CAddress addr(addrLocalHost);
addr.nTime = GetAdjustedTime();
CRITICAL_BLOCK(cs_vNodes)
foreach(CNode* pnode, vNodes)
pnode->PushAddress(addr);
}
}
}
bool AddAddress(CAddress addr, int64 nTimePenalty)
{
if (!addr.IsRoutable())
return false;
if (addr.ip == addrLocalHost.ip)
return false;
addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty);
CRITICAL_BLOCK(cs_mapAddresses)
{
map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
if (it == mapAddresses.end())
{
// New address
printf("AddAddress(%s)\n", addr.ToStringLog().c_str());
mapAddresses.insert(make_pair(addr.GetKey(), addr));
CAddrDB().WriteAddress(addr);
return true;
}
else
{
bool fUpdated = false;
CAddress& addrFound = (*it).second;
if ((addrFound.nServices | addr.nServices) != addrFound.nServices)
{
// Services have been added
addrFound.nServices |= addr.nServices;
fUpdated = true;
}
bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60);
int64 nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60);
if (addrFound.nTime < addr.nTime - nUpdateInterval)
{
// Periodically update most recently seen time
addrFound.nTime = addr.nTime;
fUpdated = true;
}
if (fUpdated)
CAddrDB().WriteAddress(addrFound);
}
}
return false;
}
void AddressCurrentlyConnected(const CAddress& addr)
{
CRITICAL_BLOCK(cs_mapAddresses)
{
// Only if it's been published already
map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
if (it != mapAddresses.end())
{
CAddress& addrFound = (*it).second;
int64 nUpdateInterval = 20 * 60;
if (addrFound.nTime < GetAdjustedTime() - nUpdateInterval)
{
// Periodically update most recently seen time
addrFound.nTime = GetAdjustedTime();
CAddrDB addrdb;
addrdb.WriteAddress(addrFound);
}
}
}
}
void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1)
{
// If the dialog might get closed before the reply comes back,
// call this in the destructor so it doesn't get called after it's deleted.
CRITICAL_BLOCK(cs_vNodes)
{
foreach(CNode* pnode, vNodes)
{
CRITICAL_BLOCK(pnode->cs_mapRequests)
{
for (map<uint256, CRequestTracker>::iterator mi = pnode->mapRequests.begin(); mi != pnode->mapRequests.end();)
{
CRequestTracker& tracker = (*mi).second;
if (tracker.fn == fn && tracker.param1 == param1)
pnode->mapRequests.erase(mi++);
else
mi++;
}
}
}
}
}
//
// Subscription methods for the broadcast and subscription system.
// Channel numbers are message numbers, i.e. MSG_TABLE and MSG_PRODUCT.
//
// The subscription system uses a meet-in-the-middle strategy.
// With 100,000 nodes, if senders broadcast to 1000 random nodes and receivers
// subscribe to 1000 random nodes, 99.995% (1 - 0.99^1000) of messages will get through.
//
bool AnySubscribed(unsigned int nChannel)
{
if (pnodeLocalHost->IsSubscribed(nChannel))
return true;
CRITICAL_BLOCK(cs_vNodes)
foreach(CNode* pnode, vNodes)
if (pnode->IsSubscribed(nChannel))
return true;
return false;
}
bool CNode::IsSubscribed(unsigned int nChannel)
{
if (nChannel >= vfSubscribe.size())
return false;
return vfSubscribe[nChannel];
}
void CNode::Subscribe(unsigned int nChannel, unsigned int nHops)
{
if (nChannel >= vfSubscribe.size())
return;
if (!AnySubscribed(nChannel))
{
// Relay subscribe
CRITICAL_BLOCK(cs_vNodes)
foreach(CNode* pnode, vNodes)
if (pnode != this)
pnode->PushMessage("subscribe", nChannel, nHops);
}
vfSubscribe[nChannel] = true;
}
void CNode::CancelSubscribe(unsigned int nChannel)
{
if (nChannel >= vfSubscribe.size())
return;
// Prevent from relaying cancel if wasn't subscribed
if (!vfSubscribe[nChannel])
return;
vfSubscribe[nChannel] = false;
if (!AnySubscribed(nChannel))
{
// Relay subscription cancel
CRITICAL_BLOCK(cs_vNodes)
foreach(CNode* pnode, vNodes)
if (pnode != this)
pnode->PushMessage("sub-cancel", nChannel);
}
}
CNode* FindNode(unsigned int ip)
{
CRITICAL_BLOCK(cs_vNodes)
{
foreach(CNode* pnode, vNodes)
if (pnode->addr.ip == ip)
return (pnode);
}
return NULL;
}
CNode* FindNode(CAddress addr)
{
CRITICAL_BLOCK(cs_vNodes)
{
foreach(CNode* pnode, vNodes)
if (pnode->addr == addr)
return (pnode);
}
return NULL;
}
CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
{
if (addrConnect.ip == addrLocalHost.ip)
return NULL;
// Look for an existing connection
CNode* pnode = FindNode(addrConnect.ip);
if (pnode)
{
if (nTimeout != 0)
pnode->AddRef(nTimeout);
else
pnode->AddRef();
return pnode;
}
/// debug print
printf("trying connection %s lastseen=%.1fhrs lasttry=%.1fhrs\n",
addrConnect.ToStringLog().c_str(),
(double)(addrConnect.nTime - GetAdjustedTime())/3600.0,
(double)(addrConnect.nLastTry - GetAdjustedTime())/3600.0);
CRITICAL_BLOCK(cs_mapAddresses)
mapAddresses[addrConnect.GetKey()].nLastTry = GetAdjustedTime();
// Connect
SOCKET hSocket;
if (ConnectSocket(addrConnect, hSocket))
{
/// debug print
printf("connected %s\n", addrConnect.ToStringLog().c_str());
// Set to nonblocking
#ifdef __WXMSW__
u_long nOne = 1;
if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR)
printf("ConnectSocket() : ioctlsocket nonblocking setting failed, error %d\n", WSAGetLastError());
#else
if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
printf("ConnectSocket() : fcntl nonblocking setting failed, error %d\n", errno);
#endif
// Add node
CNode* pnode = new CNode(hSocket, addrConnect, false);
if (nTimeout != 0)
pnode->AddRef(nTimeout);
else
pnode->AddRef();
CRITICAL_BLOCK(cs_vNodes)
vNodes.push_back(pnode);
pnode->nTimeConnected = GetTime();
return pnode;
}
else
{
return NULL;
}
}
void CNode::CloseSocketDisconnect()
{
fDisconnect = true;
if (hSocket != INVALID_SOCKET)
{
if (fDebug)
printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
printf("disconnecting node %s\n", addr.ToStringLog().c_str());
closesocket(hSocket);
hSocket = INVALID_SOCKET;
}
}
void CNode::Cleanup()
{
// All of a nodes broadcasts and subscriptions are automatically torn down
// when it goes down, so a node has to stay up to keep its broadcast going.
// Cancel subscriptions
for (unsigned int nChannel = 0; nChannel < vfSubscribe.size(); nChannel++)
if (vfSubscribe[nChannel])
CancelSubscribe(nChannel);
}
void ThreadSocketHandler(void* parg)
{
IMPLEMENT_RANDOMIZE_STACK(ThreadSocketHandler(parg));
try
{
vnThreadsRunning[0]++;
ThreadSocketHandler2(parg);
vnThreadsRunning[0]--;
}
catch (std::exception& e) {
vnThreadsRunning[0]--;
PrintException(&e, "ThreadSocketHandler()");
} catch (...) {
vnThreadsRunning[0]--;
throw; // support pthread_cancel()
}
printf("ThreadSocketHandler exiting\n");
}
void ThreadSocketHandler2(void* parg)
{
printf("ThreadSocketHandler started\n");
list<CNode*> vNodesDisconnected;
int nPrevNodeCount = 0;
loop
{
//
// Disconnect nodes
//
CRITICAL_BLOCK(cs_vNodes)
{
// Disconnect unused nodes
vector<CNode*> vNodesCopy = vNodes;
foreach(CNode* pnode, vNodesCopy)
{
if (pnode->fDisconnect ||
(pnode->GetRefCount() <= 0 && pnode->vRecv.empty() && pnode->vSend.empty()))
{
// remove from vNodes
vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
// close socket and cleanup
pnode->CloseSocketDisconnect();
pnode->Cleanup();
// hold in disconnected pool until all refs are released
pnode->nReleaseTime = max(pnode->nReleaseTime, GetTime() + 15 * 60);
if (pnode->fNetworkNode || pnode->fInbound)
pnode->Release();
vNodesDisconnected.push_back(pnode);
}
}
// Delete disconnected nodes
list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
foreach(CNode* pnode, vNodesDisconnectedCopy)
{
// wait until threads are done using it
if (pnode->GetRefCount() <= 0)
{
bool fDelete = false;
TRY_CRITICAL_BLOCK(pnode->cs_vSend)
TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
TRY_CRITICAL_BLOCK(pnode->cs_mapRequests)
TRY_CRITICAL_BLOCK(pnode->cs_inventory)
fDelete = true;
if (fDelete)
{
vNodesDisconnected.remove(pnode);
delete pnode;
}
}
}
}
if (vNodes.size() != nPrevNodeCount)
{
nPrevNodeCount = vNodes.size();
MainFrameRepaint();
}
//
// Find which sockets have data to receive
//
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 50000; // frequency to poll pnode->vSend
fd_set fdsetRecv;
fd_set fdsetSend;
fd_set fdsetError;
FD_ZERO(&fdsetRecv);
FD_ZERO(&fdsetSend);
FD_ZERO(&fdsetError);
SOCKET hSocketMax = 0;
if(hListenSocket != INVALID_SOCKET)
FD_SET(hListenSocket, &fdsetRecv);
hSocketMax = max(hSocketMax, hListenSocket);
CRITICAL_BLOCK(cs_vNodes)
{
foreach(CNode* pnode, vNodes)
{
if (pnode->hSocket == INVALID_SOCKET || pnode->hSocket < 0)
continue;
FD_SET(pnode->hSocket, &fdsetRecv);
FD_SET(pnode->hSocket, &fdsetError);
hSocketMax = max(hSocketMax, pnode->hSocket);
TRY_CRITICAL_BLOCK(pnode->cs_vSend)
if (!pnode->vSend.empty())
FD_SET(pnode->hSocket, &fdsetSend);
}
}
vnThreadsRunning[0]--;
int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout);
vnThreadsRunning[0]++;
if (fShutdown)
return;
if (nSelect == SOCKET_ERROR)
{
int nErr = WSAGetLastError();
printf("socket select error %d\n", nErr);
for (int i = 0; i <= hSocketMax; i++)
FD_SET(i, &fdsetRecv);
FD_ZERO(&fdsetSend);
FD_ZERO(&fdsetError);
Sleep(timeout.tv_usec/1000);
}
//
// Accept new connections
//
if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
{
struct sockaddr_in sockaddr;
socklen_t len = sizeof(sockaddr);
SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
CAddress addr(sockaddr);
int nInbound = 0;
CRITICAL_BLOCK(cs_vNodes)
foreach(CNode* pnode, vNodes)
if (pnode->fInbound)
nInbound++;
if (hSocket == INVALID_SOCKET)
{
if (WSAGetLastError() != WSAEWOULDBLOCK)
printf("socket error accept failed: %d\n", WSAGetLastError());
}
else if (nInbound >= GetArg("-maxconnections", 125) - MAX_OUTBOUND_CONNECTIONS)
{
closesocket(hSocket);
}
else
{
printf("accepted connection %s\n", addr.ToStringLog().c_str());
CNode* pnode = new CNode(hSocket, addr, true);
pnode->AddRef();
CRITICAL_BLOCK(cs_vNodes)
vNodes.push_back(pnode);
}
}
//
// Service each socket
//
vector<CNode*> vNodesCopy;
CRITICAL_BLOCK(cs_vNodes)
{
vNodesCopy = vNodes;
foreach(CNode* pnode, vNodesCopy)
pnode->AddRef();
}
foreach(CNode* pnode, vNodesCopy)
{
if (fShutdown)
return;
//
// Receive
//
if (pnode->hSocket == INVALID_SOCKET)
continue;
if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
{
TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
{
CDataStream& vRecv = pnode->vRecv;
unsigned int nPos = vRecv.size();
if (nPos > 1000*GetArg("-maxreceivebuffer", 10*1000)) {
if (!pnode->fDisconnect)
printf("socket recv flood control disconnect (%d bytes)\n", vRecv.size());
pnode->CloseSocketDisconnect();
}
else {
// typical socket buffer is 8K-64K
char pchBuf[0x10000];
int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
if (nBytes > 0)
{
vRecv.resize(nPos + nBytes);
memcpy(&vRecv[nPos], pchBuf, nBytes);
pnode->nLastRecv = GetTime();
}
else if (nBytes == 0)
{
// socket closed gracefully
if (!pnode->fDisconnect)
printf("socket closed\n");
pnode->CloseSocketDisconnect();
}
else if (nBytes < 0)
{
// error
int nErr = WSAGetLastError();
if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
{
if (!pnode->fDisconnect)
printf("socket recv error %d\n", nErr);
pnode->CloseSocketDisconnect();
}
}
}
}
}
//
// Send
//
if (pnode->hSocket == INVALID_SOCKET)
continue;
if (FD_ISSET(pnode->hSocket, &fdsetSend))
{
TRY_CRITICAL_BLOCK(pnode->cs_vSend)
{
CDataStream& vSend = pnode->vSend;
if (!vSend.empty())
{
int nBytes = send(pnode->hSocket, &vSend[0], vSend.size(), MSG_NOSIGNAL | MSG_DONTWAIT);
if (nBytes > 0)
{
vSend.erase(vSend.begin(), vSend.begin() + nBytes);
pnode->nLastSend = GetTime();
}
else if (nBytes < 0)
{
// error
int nErr = WSAGetLastError();
if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
{
printf("socket send error %d\n", nErr);
pnode->CloseSocketDisconnect();
}
}
if (vSend.size() > 1000*GetArg("-maxsendbuffer", 10*1000)) {
if (!pnode->fDisconnect)
printf("socket send flood control disconnect (%d bytes)\n", vSend.size());
pnode->CloseSocketDisconnect();
}
}
}
}
//
// Inactivity checking
//
if (pnode->vSend.empty())
pnode->nLastSendEmpty = GetTime();
if (GetTime() - pnode->nTimeConnected > 60)
{
if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
{
printf("socket no message in first 60 seconds, %d %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0);
pnode->fDisconnect = true;
}
else if (GetTime() - pnode->nLastSend > 90*60 && GetTime() - pnode->nLastSendEmpty > 90*60)
{
printf("socket not sending\n");
pnode->fDisconnect = true;
}
else if (GetTime() - pnode->nLastRecv > 90*60)
{
printf("socket inactivity timeout\n");
pnode->fDisconnect = true;
}
}
}
CRITICAL_BLOCK(cs_vNodes)
{
foreach(CNode* pnode, vNodesCopy)
pnode->Release();
}
Sleep(10);
}
}
#ifdef USE_UPNP
void ThreadMapPort(void* parg)
{
IMPLEMENT_RANDOMIZE_STACK(ThreadMapPort(parg));
try
{
vnThreadsRunning[5]++;
ThreadMapPort2(parg);
vnThreadsRunning[5]--;
}
catch (std::exception& e) {
vnThreadsRunning[5]--;
PrintException(&e, "ThreadMapPort()");
} catch (...) {
vnThreadsRunning[5]--;
PrintException(NULL, "ThreadMapPort()");
}
printf("ThreadMapPort exiting\n");
}
void ThreadMapPort2(void* parg)
{
printf("ThreadMapPort started\n");
char port[6];
sprintf(port, "%d", ntohs(GetDefaultPort()));
const char * rootdescurl = 0;
const char * multicastif = 0;
const char * minissdpdpath = 0;
struct UPNPDev * devlist = 0;
char lanaddr[64];
devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0);
struct UPNPUrls urls;
struct IGDdatas data;
int r;
r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
if (r == 1)
{
char intClient[16];
char intPort[6];
#ifndef __WXMSW__
r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
port, port, lanaddr, 0, "TCP", 0);
#else
r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
port, port, lanaddr, 0, "TCP", 0, "0");
#endif
if(r!=UPNPCOMMAND_SUCCESS)
printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
port, port, lanaddr, r, strupnperror(r));
else
printf("UPnP Port Mapping successful.\n");
loop {
if (fShutdown || !fUseUPnP)
{
r = UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype, port, "TCP", 0);
printf("UPNP_DeletePortMapping() returned : %d\n", r);
freeUPNPDevlist(devlist); devlist = 0;
FreeUPNPUrls(&urls);
return;
}
Sleep(2000);
}
} else {
printf("No valid UPnP IGDs found\n");
freeUPNPDevlist(devlist); devlist = 0;
if (r != 0)
FreeUPNPUrls(&urls);
loop {
if (fShutdown || !fUseUPnP)
return;
Sleep(2000);
}
}
}
void MapPort(bool fMapPort)
{
if (fUseUPnP != fMapPort)
{
fUseUPnP = fMapPort;
CWalletDB().WriteSetting("fUseUPnP", fUseUPnP);
}
if (fUseUPnP && vnThreadsRunning[5] < 1)
{
if (!CreateThread(ThreadMapPort, NULL))
printf("Error: ThreadMapPort(ThreadMapPort) failed\n");
}
}
#endif
static const char *strDNSSeed[] = {
"bitseed.xf2.org",
"bitseed.bitcoin.org.uk",
};
void DNSAddressSeed()
{
int found = 0;
printf("Loading addresses from DNS seeds (could take a while)\n");
for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
struct hostent* phostent = gethostbyname(strDNSSeed[seed_idx]);
if (!phostent)
continue;
for (int host = 0; phostent->h_addr_list[host] != NULL; host++) {
CAddress addr(*(unsigned int*)phostent->h_addr_list[host],
GetDefaultPort(), NODE_NETWORK);
addr.nTime = 0;
if (addr.IsValid() && addr.GetByte(3) != 127) {
AddAddress(addr);
found++;
}
}
}