src/net.cpp

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2012 The Bitcoin developers
   3 // Distributed under the MIT/X11 software license, see the accompanying
   4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #include "headers.h"
   7 #include "irc.h"
   8 #include "db.h"
   9 #include "net.h"
  10 #include "init.h"
  11 #include "strlcpy.h"
  12
  13 #ifdef WIN32
  14 #include <string.h>
  15 #endif
  16
  17 #ifdef USE_UPNP
  18 #include <miniupnpc/miniwget.h>
  19 #include <miniupnpc/miniupnpc.h>
  20 #include <miniupnpc/upnpcommands.h>
  21 #include <miniupnpc/upnperrors.h>
  22 #endif
  23
  24 using namespace std;
  25 using namespace boost;
  26
  27 static const int MAX_OUTBOUND_CONNECTIONS = 8;
  28
  29 void ThreadMessageHandler2(void* parg);
  30 void ThreadSocketHandler2(void* parg);
  31 void ThreadOpenConnections2(void* parg);
  32 void ThreadOpenAddedConnections2(void* parg);
  33 #ifdef USE_UPNP
  34 void ThreadMapPort2(void* parg);
  35 #endif
  36 void ThreadDNSAddressSeed2(void* parg);
  37 bool OpenNetworkConnection(const CAddress& addrConnect);
  38
  39
  40
  41
  42
  43 //
  44 // Global state variables
  45 //
  46 bool fClient = false;
  47 bool fAllowDNS = false;
  48 uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
  49 CAddress addrLocalHost(CService("0.0.0.0", 0), nLocalServices);
  50 static CNode* pnodeLocalHost = NULL;
  51 uint64 nLocalHostNonce = 0;
  52 array<int, 10> vnThreadsRunning;
  53 static SOCKET hListenSocket = INVALID_SOCKET;
  54
  55 vector<CNode*> vNodes;
  56 CCriticalSection cs_vNodes;
  57 map<vector<unsigned char>, CAddress> mapAddresses;
  58 CCriticalSection cs_mapAddresses;
  59 map<CInv, CDataStream> mapRelay;
  60 deque<pair<int64, CInv> > vRelayExpiration;
  61 CCriticalSection cs_mapRelay;
  62 map<CInv, int64> mapAlreadyAskedFor;
  63
  64
  65 set<CNetAddr> setservAddNodeAddresses;
  66 CCriticalSection cs_setservAddNodeAddresses;
  67
  68
  69
  70
  71 unsigned short GetListenPort()
  72 {
  73     return (unsigned short)(GetArg("-port", GetDefaultPort()));
  74 }
  75
  76 void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd)
  77 {
  78     // Filter out duplicate requests
  79     if (pindexBegin == pindexLastGetBlocksBegin && hashEnd == hashLastGetBlocksEnd)
  80         return;
  81     pindexLastGetBlocksBegin = pindexBegin;
  82     hashLastGetBlocksEnd = hashEnd;
  83
  84     PushMessage("getblocks", CBlockLocator(pindexBegin), hashEnd);
  85 }
  86
  87
  88
  89
  90
  91 bool GetMyExternalIP2(const CService& addrConnect, const char* pszGet, const char* pszKeyword, CNetAddr& ipRet)
  92 {
  93     SOCKET hSocket;
  94     if (!ConnectSocket(addrConnect, hSocket))
  95         return error("GetMyExternalIP() : connection to %s failed", addrConnect.ToString().c_str());
  96
  97     send(hSocket, pszGet, strlen(pszGet), MSG_NOSIGNAL);
  98
  99     string strLine;
 100     while (RecvLine(hSocket, strLine))
 101     {
 102         if (strLine.empty()) // HTTP response is separated from headers by blank line
 103         {
 104             loop
 105             {
 106                 if (!RecvLine(hSocket, strLine))
 107                 {
 108                     closesocket(hSocket);
 109                     return false;
 110                 }
 111                 if (pszKeyword == NULL)
 112                     break;
 113                 if (strLine.find(pszKeyword) != -1)
 114                 {
 115                     strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword));
 116                     break;
 117                 }
 118             }
 119             closesocket(hSocket);
 120             if (strLine.find("<") != -1)
 121                 strLine = strLine.substr(0, strLine.find("<"));
 122             strLine = strLine.substr(strspn(strLine.c_str(), " \t\n\r"));
 123             while (strLine.size() > 0 && isspace(strLine[strLine.size()-1]))
 124                 strLine.resize(strLine.size()-1);
 125             CService addr(strLine,0,true);
 126             printf("GetMyExternalIP() received [%s] %s\n", strLine.c_str(), addr.ToString().c_str());
 127             if (!addr.IsValid() || !addr.IsRoutable())
 128                 return false;
 129             ipRet.SetIP(addr);
 130             return true;
 131         }
 132     }
 133     closesocket(hSocket);
 134     return error("GetMyExternalIP() : connection closed");
 135 }
 136
 137 // We now get our external IP from the IRC server first and only use this as a backup
 138 bool GetMyExternalIP(CNetAddr& ipRet)
 139 {
 140     CService addrConnect;
 141     const char* pszGet;
 142     const char* pszKeyword;
 143
 144     if (fNoListen||fUseProxy)
 145         return false;
 146
 147     for (int nLookup = 0; nLookup <= 1; nLookup++)
 148     for (int nHost = 1; nHost <= 2; nHost++)
 149     {
 150         // We should be phasing out our use of sites like these.  If we need
 151         // replacements, we should ask for volunteers to put this simple
 152         // php file on their webserver that prints the client IP:
 153         //  <?php echo $_SERVER["REMOTE_ADDR"]; ?>
 154         if (nHost == 1)
 155         {
 156             addrConnect = CService("91.198.22.70",80); // checkip.dyndns.org
 157
 158             if (nLookup == 1)
 159             {
 160                 CService addrIP("checkip.dyndns.org", 80, true);
 161                 if (addrIP.IsValid())
 162                     addrConnect = addrIP;
 163             }
 164
 165             pszGet = "GET / HTTP/1.1\r\n"
 166                      "Host: checkip.dyndns.org\r\n"
 167                      "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
 168                      "Connection: close\r\n"
 169                      "\r\n";
 170
 171             pszKeyword = "Address:";
 172         }
 173         else if (nHost == 2)
 174         {
 175             addrConnect = CService("74.208.43.192", 80); // www.showmyip.com
 176
 177             if (nLookup == 1)
 178             {
 179                 CService addrIP("www.showmyip.com", 80, true);
 180                 if (addrIP.IsValid())
 181                     addrConnect = addrIP;
 182             }
 183
 184             pszGet = "GET /simple/ HTTP/1.1\r\n"
 185                      "Host: www.showmyip.com\r\n"
 186                      "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
 187                      "Connection: close\r\n"
 188                      "\r\n";
 189
 190             pszKeyword = NULL; // Returns just IP address
 191         }
 192
 193         if (GetMyExternalIP2(addrConnect, pszGet, pszKeyword, ipRet))
 194             return true;
 195     }
 196
 197     return false;
 198 }
 199
 200 void ThreadGetMyExternalIP(void* parg)
 201 {
 202     // Wait for IRC to get it first
 203     if (GetBoolArg("-irc", false))
 204     {
 205         for (int i = 0; i < 2 * 60; i++)
 206         {
 207             Sleep(1000);
 208             if (fGotExternalIP || fShutdown)
 209                 return;
 210         }
 211     }
 212
 213     // Fallback in case IRC fails to get it
 214     if (GetMyExternalIP(addrLocalHost))
 215     {
 216         printf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP().c_str());
 217         if (addrLocalHost.IsRoutable())
 218         {
 219             // If we already connected to a few before we had our IP, go back and addr them.
 220             // setAddrKnown automatically filters any duplicate sends.
 221             CAddress addr(addrLocalHost);
 222             addr.nTime = GetAdjustedTime();
 223             CRITICAL_BLOCK(cs_vNodes)
 224                 BOOST_FOREACH(CNode* pnode, vNodes)
 225                     pnode->PushAddress(addr);
 226         }
 227     }
 228 }
 229
 230
 231
 232
 233
 234 bool AddAddress(CAddress addr, int64 nTimePenalty, CAddrDB *pAddrDB)
 235 {
 236     if (!addr.IsRoutable())
 237         return false;
 238     if ((CService)addr == (CService)addrLocalHost)
 239         return false;
 240     addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty);
 241     bool fUpdated = false;
 242     bool fNew = false;
 243     CAddress addrFound = addr;
 244
 245     CRITICAL_BLOCK(cs_mapAddresses)
 246     {
 247         map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
 248         if (it == mapAddresses.end())
 249         {
 250             // New address
 251             printf("AddAddress(%s)\n", addr.ToString().c_str());
 252             mapAddresses.insert(make_pair(addr.GetKey(), addr));
 253             fUpdated = true;
 254             fNew = true;
 255         }
 256         else
 257         {
 258             addrFound = (*it).second;
 259             if ((addrFound.nServices | addr.nServices) != addrFound.nServices)
 260             {
 261                 // Services have been added
 262                 addrFound.nServices |= addr.nServices;
 263                 fUpdated = true;
 264             }
 265             bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60);
 266             int64 nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60);
 267             if (addrFound.nTime < addr.nTime - nUpdateInterval)
 268             {
 269                 // Periodically update most recently seen time
 270                 addrFound.nTime = addr.nTime;
 271                 fUpdated = true;
 272             }
 273         }
 274     }
 275     // There is a nasty deadlock bug if this is done inside the cs_mapAddresses
 276     // CRITICAL_BLOCK:
 277     // Thread 1:  begin db transaction (locks inside-db-mutex)
 278     //            then AddAddress (locks cs_mapAddresses)
 279     // Thread 2:  AddAddress (locks cs_mapAddresses)
 280     //             ... then db operation hangs waiting for inside-db-mutex
 281     if (fUpdated)
 282     {
 283         if (pAddrDB)
 284             pAddrDB->WriteAddress(addrFound);
 285         else
 286             CAddrDB().WriteAddress(addrFound);
 287     }
 288     return fNew;
 289 }
 290
 291 void AddressCurrentlyConnected(const CService& addr)
 292 {
 293     CAddress *paddrFound = NULL;
 294
 295     CRITICAL_BLOCK(cs_mapAddresses)
 296     {
 297         // Only if it's been published already
 298         map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
 299         if (it != mapAddresses.end())
 300             paddrFound = &(*it).second;
 301     }
 302
 303     if (paddrFound)
 304     {
 305         int64 nUpdateInterval = 20 * 60;
 306         if (paddrFound->nTime < GetAdjustedTime() - nUpdateInterval)
 307         {
 308             // Periodically update most recently seen time
 309             paddrFound->nTime = GetAdjustedTime();
 310             CAddrDB addrdb;
 311             addrdb.WriteAddress(*paddrFound);
 312         }
 313     }
 314 }
 315
 316
 317
 318
 319
 320 void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1)
 321 {
 322     // If the dialog might get closed before the reply comes back,
 323     // call this in the destructor so it doesn't get called after it's deleted.
 324     CRITICAL_BLOCK(cs_vNodes)
 325     {
 326         BOOST_FOREACH(CNode* pnode, vNodes)
 327         {
 328             CRITICAL_BLOCK(pnode->cs_mapRequests)
 329             {
 330                 for (map<uint256, CRequestTracker>::iterator mi = pnode->mapRequests.begin(); mi != pnode->mapRequests.end();)
 331                 {
 332                     CRequestTracker& tracker = (*mi).second;
 333                     if (tracker.fn == fn && tracker.param1 == param1)
 334                         pnode->mapRequests.erase(mi++);
 335                     else
 336                         mi++;
 337                 }
 338             }
 339         }
 340     }
 341 }
 342
 343
 344
 345
 346
 347
 348
 349 //
 350 // Subscription methods for the broadcast and subscription system.
 351 // Channel numbers are message numbers, i.e. MSG_TABLE and MSG_PRODUCT.
 352 //
 353 // The subscription system uses a meet-in-the-middle strategy.
 354 // With 100,000 nodes, if senders broadcast to 1000 random nodes and receivers
 355 // subscribe to 1000 random nodes, 99.995% (1 - 0.99^1000) of messages will get through.
 356 //
 357
 358 bool AnySubscribed(unsigned int nChannel)
 359 {
 360     if (pnodeLocalHost->IsSubscribed(nChannel))
 361         return true;
 362     CRITICAL_BLOCK(cs_vNodes)
 363         BOOST_FOREACH(CNode* pnode, vNodes)
 364             if (pnode->IsSubscribed(nChannel))
 365                 return true;
 366     return false;
 367 }
 368
 369 bool CNode::IsSubscribed(unsigned int nChannel)
 370 {
 371     if (nChannel >= vfSubscribe.size())
 372         return false;
 373     return vfSubscribe[nChannel];
 374 }
 375
 376 void CNode::Subscribe(unsigned int nChannel, unsigned int nHops)
 377 {
 378     if (nChannel >= vfSubscribe.size())
 379         return;
 380
 381     if (!AnySubscribed(nChannel))
 382     {
 383         // Relay subscribe
 384         CRITICAL_BLOCK(cs_vNodes)
 385             BOOST_FOREACH(CNode* pnode, vNodes)
 386                 if (pnode != this)
 387                     pnode->PushMessage("subscribe", nChannel, nHops);
 388     }
 389
 390     vfSubscribe[nChannel] = true;
 391 }
 392
 393 void CNode::CancelSubscribe(unsigned int nChannel)
 394 {
 395     if (nChannel >= vfSubscribe.size())
 396         return;
 397
 398     // Prevent from relaying cancel if wasn't subscribed
 399     if (!vfSubscribe[nChannel])
 400         return;
 401     vfSubscribe[nChannel] = false;
 402
 403     if (!AnySubscribed(nChannel))
 404     {
 405         // Relay subscription cancel
 406         CRITICAL_BLOCK(cs_vNodes)
 407             BOOST_FOREACH(CNode* pnode, vNodes)
 408                 if (pnode != this)
 409                     pnode->PushMessage("sub-cancel", nChannel);
 410     }
 411 }
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421 CNode* FindNode(const CNetAddr& ip)
 422 {
 423     CRITICAL_BLOCK(cs_vNodes)
 424     {
 425         BOOST_FOREACH(CNode* pnode, vNodes)
 426             if ((CNetAddr)pnode->addr == ip)
 427                 return (pnode);
 428     }
 429     return NULL;
 430 }
 431
 432 CNode* FindNode(const CService& addr)
 433 {
 434     CRITICAL_BLOCK(cs_vNodes)
 435     {
 436         BOOST_FOREACH(CNode* pnode, vNodes)
 437             if ((CService)pnode->addr == addr)
 438                 return (pnode);
 439     }
 440     return NULL;
 441 }
 442
 443 CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
 444 {
 445     if ((CNetAddr)addrConnect == (CNetAddr)addrLocalHost)
 446         return NULL;
 447
 448     // Look for an existing connection
 449     CNode* pnode = FindNode((CService)addrConnect);
 450     if (pnode)
 451     {
 452         if (nTimeout != 0)
 453             pnode->AddRef(nTimeout);
 454         else
 455             pnode->AddRef();
 456         return pnode;
 457     }
 458
 459     /// debug print
 460     printf("trying connection %s lastseen=%.1fhrs lasttry=%.1fhrs\n",
 461         addrConnect.ToString().c_str(),
 462         (double)(addrConnect.nTime - GetAdjustedTime())/3600.0,
 463         (double)(addrConnect.nLastTry - GetAdjustedTime())/3600.0);
 464
 465     CRITICAL_BLOCK(cs_mapAddresses)
 466         mapAddresses[addrConnect.GetKey()].nLastTry = GetAdjustedTime();
 467
 468     // Connect
 469     SOCKET hSocket;
 470     if (ConnectSocket(addrConnect, hSocket))
 471     {
 472         /// debug print
 473         printf("connected %s\n", addrConnect.ToString().c_str());
 474
 475         // Set to nonblocking
 476 #ifdef WIN32
 477         u_long nOne = 1;
 478         if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR)
 479             printf("ConnectSocket() : ioctlsocket nonblocking setting failed, error %d\n", WSAGetLastError());
 480 #else
 481         if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
 482             printf("ConnectSocket() : fcntl nonblocking setting failed, error %d\n", errno);
 483 #endif
 484
 485         // Add node
 486         CNode* pnode = new CNode(hSocket, addrConnect, false);
 487         if (nTimeout != 0)
 488             pnode->AddRef(nTimeout);
 489         else
 490             pnode->AddRef();
 491         CRITICAL_BLOCK(cs_vNodes)
 492             vNodes.push_back(pnode);
 493
 494         pnode->nTimeConnected = GetTime();
 495         return pnode;
 496     }
 497     else
 498     {
 499         return NULL;
 500     }
 501 }
 502
 503 void CNode::CloseSocketDisconnect()
 504 {
 505     fDisconnect = true;
 506     if (hSocket != INVALID_SOCKET)
 507     {
 508         if (fDebug)
 509             printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
 510         printf("disconnecting node %s\n", addr.ToString().c_str());
 511         closesocket(hSocket);
 512         hSocket = INVALID_SOCKET;
 513     }
 514 }
 515
 516 void CNode::Cleanup()
 517 {
 518     // All of a nodes broadcasts and subscriptions are automatically torn down
 519     // when it goes down, so a node has to stay up to keep its broadcast going.
 520
 521     // Cancel subscriptions
 522     for (unsigned int nChannel = 0; nChannel < vfSubscribe.size(); nChannel++)
 523         if (vfSubscribe[nChannel])
 524             CancelSubscribe(nChannel);
 525 }
 526
 527
 528 void CNode::PushVersion()
 529 {
 530     /// when NTP implemented, change to just nTime = GetAdjustedTime()
 531     int64 nTime = (fInbound ? GetAdjustedTime() : GetTime());
 532     CAddress addrYou = (fUseProxy ? CAddress(CService("0.0.0.0",0)) : addr);
 533     CAddress addrMe = (fUseProxy ? CAddress(CService("0.0.0.0",0)) : addrLocalHost);
 534     RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
 535     PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
 536                 nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, std::vector<string>()), nBestHeight);
 537 }
 538
 539
 540
 541
 542
 543 std::map<CNetAddr, int64> CNode::setBanned;
 544 CCriticalSection CNode::cs_setBanned;
 545
 546 void CNode::ClearBanned()
 547 {
 548     setBanned.clear();
 549 }
 550
 551 bool CNode::IsBanned(CNetAddr ip)
 552 {
 553     bool fResult = false;
 554     CRITICAL_BLOCK(cs_setBanned)
 555     {
 556         std::map<CNetAddr, int64>::iterator i = setBanned.find(ip);
 557         if (i != setBanned.end())
 558         {
 559             int64 t = (*i).second;
 560             if (GetTime() < t)
 561                 fResult = true;
 562         }
 563     }
 564     return fResult;
 565 }
 566
 567 bool CNode::Misbehaving(int howmuch)
 568 {
 569     if (addr.IsLocal())
 570     {
 571         printf("Warning: local node %s misbehaving\n", addr.ToString().c_str());
 572         return false;
 573     }
 574
 575     nMisbehavior += howmuch;
 576     if (nMisbehavior >= GetArg("-banscore", 100))
 577     {
 578         int64 banTime = GetTime()+GetArg("-bantime", 60*60*24);  // Default 24-hour ban
 579         CRITICAL_BLOCK(cs_setBanned)
 580             if (setBanned[addr] < banTime)
 581                 setBanned[addr] = banTime;
 582         CloseSocketDisconnect();
 583         printf("Disconnected %s for misbehavior (score=%d)\n", addr.ToString().c_str(), nMisbehavior);
 584         return true;
 585     }
 586     return false;
 587 }
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600 void ThreadSocketHandler(void* parg)
 601 {
 602     IMPLEMENT_RANDOMIZE_STACK(ThreadSocketHandler(parg));
 603     try
 604     {
 605         vnThreadsRunning[0]++;
 606         ThreadSocketHandler2(parg);
 607         vnThreadsRunning[0]--;
 608     }
 609     catch (std::exception& e) {
 610         vnThreadsRunning[0]--;
 611         PrintException(&e, "ThreadSocketHandler()");
 612     } catch (...) {
 613         vnThreadsRunning[0]--;
 614         throw; // support pthread_cancel()
 615     }
 616     printf("ThreadSocketHandler exiting\n");
 617 }
 618
 619 void ThreadSocketHandler2(void* parg)
 620 {
 621     printf("ThreadSocketHandler started\n");
 622     list<CNode*> vNodesDisconnected;
 623     int nPrevNodeCount = 0;
 624
 625     loop
 626     {
 627         //
 628         // Disconnect nodes
 629         //
 630         CRITICAL_BLOCK(cs_vNodes)
 631         {
 632             // Disconnect unused nodes
 633             vector<CNode*> vNodesCopy = vNodes;
 634             BOOST_FOREACH(CNode* pnode, vNodesCopy)
 635             {
 636                 if (pnode->fDisconnect ||
 637                     (pnode->GetRefCount() <= 0 && pnode->vRecv.empty() && pnode->vSend.empty()))
 638                 {
 639                     // remove from vNodes
 640                     vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
 641
 642                     // close socket and cleanup
 643                     pnode->CloseSocketDisconnect();
 644                     pnode->Cleanup();
 645
 646                     // hold in disconnected pool until all refs are released
 647                     pnode->nReleaseTime = max(pnode->nReleaseTime, GetTime() + 15 * 60);
 648                     if (pnode->fNetworkNode || pnode->fInbound)
 649                         pnode->Release();
 650                     vNodesDisconnected.push_back(pnode);
 651                 }
 652             }
 653
 654             // Delete disconnected nodes
 655             list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
 656             BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy)
 657             {
 658                 // wait until threads are done using it
 659                 if (pnode->GetRefCount() <= 0)
 660                 {
 661                     bool fDelete = false;
 662                     TRY_CRITICAL_BLOCK(pnode->cs_vSend)
 663                      TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
 664                       TRY_CRITICAL_BLOCK(pnode->cs_mapRequests)
 665                        TRY_CRITICAL_BLOCK(pnode->cs_inventory)
 666                         fDelete = true;
 667                     if (fDelete)
 668                     {
 669                         vNodesDisconnected.remove(pnode);
 670                         delete pnode;
 671                     }
 672                 }
 673             }
 674         }
 675         if (vNodes.size() != nPrevNodeCount)
 676         {
 677             nPrevNodeCount = vNodes.size();
 678             MainFrameRepaint();
 679         }
 680
 681
 682         //
 683         // Find which sockets have data to receive
 684         //
 685         struct timeval timeout;
 686         timeout.tv_sec  = 0;
 687         timeout.tv_usec = 50000; // frequency to poll pnode->vSend
 688
 689         fd_set fdsetRecv;
 690         fd_set fdsetSend;
 691         fd_set fdsetError;
 692         FD_ZERO(&fdsetRecv);
 693         FD_ZERO(&fdsetSend);
 694         FD_ZERO(&fdsetError);
 695         SOCKET hSocketMax = 0;
 696
 697         if(hListenSocket != INVALID_SOCKET)
 698             FD_SET(hListenSocket, &fdsetRecv);
 699         hSocketMax = max(hSocketMax, hListenSocket);
 700         CRITICAL_BLOCK(cs_vNodes)
 701         {
 702             BOOST_FOREACH(CNode* pnode, vNodes)
 703             {
 704                 if (pnode->hSocket == INVALID_SOCKET)
 705                     continue;
 706                 FD_SET(pnode->hSocket, &fdsetRecv);
 707                 FD_SET(pnode->hSocket, &fdsetError);
 708                 hSocketMax = max(hSocketMax, pnode->hSocket);
 709                 TRY_CRITICAL_BLOCK(pnode->cs_vSend)
 710                     if (!pnode->vSend.empty())
 711                         FD_SET(pnode->hSocket, &fdsetSend);
 712             }
 713         }
 714
 715         vnThreadsRunning[0]--;
 716         int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout);
 717         vnThreadsRunning[0]++;
 718         if (fShutdown)
 719             return;
 720         if (nSelect == SOCKET_ERROR)
 721         {
 722             int nErr = WSAGetLastError();
 723             if (hSocketMax > -1)
 724             {
 725                 printf("socket select error %d\n", nErr);
 726                 for (int i = 0; i <= hSocketMax; i++)
 727                     FD_SET(i, &fdsetRecv);
 728             }
 729             FD_ZERO(&fdsetSend);
 730             FD_ZERO(&fdsetError);
 731             Sleep(timeout.tv_usec/1000);
 732         }
 733
 734
 735         //
 736         // Accept new connections
 737         //
 738         if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
 739         {
 740             struct sockaddr_in sockaddr;
 741             socklen_t len = sizeof(sockaddr);
 742             SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
 743             CAddress addr(sockaddr);
 744             int nInbound = 0;
 745
 746             CRITICAL_BLOCK(cs_vNodes)
 747                 BOOST_FOREACH(CNode* pnode, vNodes)
 748                 if (pnode->fInbound)
 749                     nInbound++;
 750             if (hSocket == INVALID_SOCKET)
 751             {
 752                 if (WSAGetLastError() != WSAEWOULDBLOCK)
 753                     printf("socket error accept failed: %d\n", WSAGetLastError());
 754             }
 755             else if (nInbound >= GetArg("-maxconnections", 125) - MAX_OUTBOUND_CONNECTIONS)
 756             {
 757                 CRITICAL_BLOCK(cs_setservAddNodeAddresses)
 758                     if (!setservAddNodeAddresses.count(addr))
 759                         closesocket(hSocket);
 760             }
 761             else if (CNode::IsBanned(addr))
 762             {
 763                 printf("connetion from %s dropped (banned)\n", addr.ToString().c_str());
 764                 closesocket(hSocket);
 765             }
 766             else
 767             {
 768                 printf("accepted connection %s\n", addr.ToString().c_str());
 769                 CNode* pnode = new CNode(hSocket, addr, true);
 770                 pnode->AddRef();
 771                 CRITICAL_BLOCK(cs_vNodes)
 772                     vNodes.push_back(pnode);
 773             }
 774         }
 775
 776
 777         //
 778         // Service each socket
 779         //
 780         vector<CNode*> vNodesCopy;
 781         CRITICAL_BLOCK(cs_vNodes)
 782         {
 783             vNodesCopy = vNodes;
 784             BOOST_FOREACH(CNode* pnode, vNodesCopy)
 785                 pnode->AddRef();
 786         }
 787         BOOST_FOREACH(CNode* pnode, vNodesCopy)
 788         {
 789             if (fShutdown)
 790                 return;
 791
 792             //
 793             // Receive
 794             //
 795             if (pnode->hSocket == INVALID_SOCKET)
 796                 continue;
 797             if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
 798             {
 799                 TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
 800                 {
 801                     CDataStream& vRecv = pnode->vRecv;
 802                     unsigned int nPos = vRecv.size();
 803
 804                     if (nPos > ReceiveBufferSize()) {
 805                         if (!pnode->fDisconnect)
 806                             printf("socket recv flood control disconnect (%d bytes)\n", vRecv.size());
 807                         pnode->CloseSocketDisconnect();
 808                     }
 809                     else {
 810                         // typical socket buffer is 8K-64K
 811                         char pchBuf[0x10000];
 812                         int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
 813                         if (nBytes > 0)
 814                         {
 815                             vRecv.resize(nPos + nBytes);
 816                             memcpy(&vRecv[nPos], pchBuf, nBytes);
 817                             pnode->nLastRecv = GetTime();
 818                         }
 819                         else if (nBytes == 0)
 820                         {
 821                             // socket closed gracefully
 822                             if (!pnode->fDisconnect)
 823                                 printf("socket closed\n");
 824                             pnode->CloseSocketDisconnect();
 825                         }
 826                         else if (nBytes < 0)
 827                         {
 828                             // error
 829                             int nErr = WSAGetLastError();
 830                             if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
 831                             {
 832                                 if (!pnode->fDisconnect)
 833                                     printf("socket recv error %d\n", nErr);
 834                                 pnode->CloseSocketDisconnect();
 835                             }
 836                         }
 837                     }
 838                 }
 839             }
 840
 841             //
 842             // Send
 843             //
 844             if (pnode->hSocket == INVALID_SOCKET)
 845                 continue;
 846             if (FD_ISSET(pnode->hSocket, &fdsetSend))
 847             {
 848                 TRY_CRITICAL_BLOCK(pnode->cs_vSend)
 849                 {
 850                     CDataStream& vSend = pnode->vSend;
 851                     if (!vSend.empty())
 852                     {
 853                         int nBytes = send(pnode->hSocket, &vSend[0], vSend.size(), MSG_NOSIGNAL | MSG_DONTWAIT);
 854                         if (nBytes > 0)
 855                         {
 856                             vSend.erase(vSend.begin(), vSend.begin() + nBytes);
 857                             pnode->nLastSend = GetTime();
 858                         }
 859                         else if (nBytes < 0)
 860                         {
 861                             // error
 862                             int nErr = WSAGetLastError();
 863                             if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
 864                             {
 865                                 printf("socket send error %d\n", nErr);
 866                                 pnode->CloseSocketDisconnect();
 867                             }
 868                         }
 869                         if (vSend.size() > SendBufferSize()) {
 870                             if (!pnode->fDisconnect)
 871                                 printf("socket send flood control disconnect (%d bytes)\n", vSend.size());
 872                             pnode->CloseSocketDisconnect();
 873                         }
 874                     }
 875                 }
 876             }
 877
 878             //
 879             // Inactivity checking
 880             //
 881             if (pnode->vSend.empty())
 882                 pnode->nLastSendEmpty = GetTime();
 883             if (GetTime() - pnode->nTimeConnected > 60)
 884             {
 885                 if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
 886                 {
 887                     printf("socket no message in first 60 seconds, %d %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0);
 888                     pnode->fDisconnect = true;
 889                 }
 890                 else if (GetTime() - pnode->nLastSend > 90*60 && GetTime() - pnode->nLastSendEmpty > 90*60)
 891                 {
 892                     printf("socket not sending\n");
 893                     pnode->fDisconnect = true;
 894                 }
 895                 else if (GetTime() - pnode->nLastRecv > 90*60)
 896                 {
 897                     printf("socket inactivity timeout\n");
 898                     pnode->fDisconnect = true;
 899                 }
 900             }
 901         }
 902         CRITICAL_BLOCK(cs_vNodes)
 903         {
 904             BOOST_FOREACH(CNode* pnode, vNodesCopy)
 905                 pnode->Release();
 906         }
 907
 908         Sleep(10);
 909     }
 910 }
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920 #ifdef USE_UPNP
 921 void ThreadMapPort(void* parg)
 922 {
 923     IMPLEMENT_RANDOMIZE_STACK(ThreadMapPort(parg));
 924     try
 925     {
 926         vnThreadsRunning[5]++;
 927         ThreadMapPort2(parg);
 928         vnThreadsRunning[5]--;
 929     }
 930     catch (std::exception& e) {
 931         vnThreadsRunning[5]--;
 932         PrintException(&e, "ThreadMapPort()");
 933     } catch (...) {
 934         vnThreadsRunning[5]--;
 935         PrintException(NULL, "ThreadMapPort()");
 936     }
 937     printf("ThreadMapPort exiting\n");
 938 }
 939
 940 void ThreadMapPort2(void* parg)
 941 {
 942     printf("ThreadMapPort started\n");
 943
 944     char port[6];
 945     sprintf(port, "%d", GetListenPort());
 946
 947     const char * multicastif = 0;
 948     const char * minissdpdpath = 0;
 949     struct UPNPDev * devlist = 0;
 950     char lanaddr[64];
 951
 952 #ifndef UPNPDISCOVER_SUCCESS
 953     /* miniupnpc 1.5 */
 954     devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0);
 955 #else
 956     /* miniupnpc 1.6 */
 957     int error = 0;
 958     devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0, 0, &error);
 959 #endif
 960
 961     struct UPNPUrls urls;
 962     struct IGDdatas data;
 963     int r;
 964
 965     r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
 966     if (r == 1)
 967     {
 968         string strDesc = "Bitcoin " + FormatFullVersion();
 969 #ifndef UPNPDISCOVER_SUCCESS
 970         /* miniupnpc 1.5 */
 971         r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
 972                             port, port, lanaddr, strDesc.c_str(), "TCP", 0);
 973 #else
 974         /* miniupnpc 1.6 */
 975         r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
 976                             port, port, lanaddr, strDesc.c_str(), "TCP", 0, "0");
 977 #endif
 978
 979         if(r!=UPNPCOMMAND_SUCCESS)
 980             printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
 981                 port, port, lanaddr, r, strupnperror(r));
 982         else
 983             printf("UPnP Port Mapping successful.\n");
 984         int i = 1;
 985         loop {
 986             if (fShutdown || !fUseUPnP)
 987             {
 988                 r = UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype, port, "TCP", 0);
 989                 printf("UPNP_DeletePortMapping() returned : %d\n", r);
 990                 freeUPNPDevlist(devlist); devlist = 0;
 991                 FreeUPNPUrls(&urls);
 992                 return;
 993             }
 994             if (i % 600 == 0) // Refresh every 20 minutes
 995             {
 996 #ifndef UPNPDISCOVER_SUCCESS
 997                 /* miniupnpc 1.5 */
 998                 r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
 999                                     port, port, lanaddr, strDesc.c_str(), "TCP", 0);
1000 #else
1001                 /* miniupnpc 1.6 */
1002                 r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
1003                                     port, port, lanaddr, strDesc.c_str(), "TCP", 0, "0");
1004 #endif
1005
1006                 if(r!=UPNPCOMMAND_SUCCESS)
1007                     printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
1008                         port, port, lanaddr, r, strupnperror(r));
1009                 else
1010                     printf("UPnP Port Mapping successful.\n");;
1011             }
1012             Sleep(2000);
1013             i++;
1014         }
1015     } else {
1016         printf("No valid UPnP IGDs found\n");
1017         freeUPNPDevlist(devlist); devlist = 0;
1018         if (r != 0)
1019             FreeUPNPUrls(&urls);
1020         loop {
1021             if (fShutdown || !fUseUPnP)
1022                 return;
1023             Sleep(2000);
1024         }
1025     }
1026 }
1027
1028 void MapPort(bool fMapPort)
1029 {
1030     if (fUseUPnP != fMapPort)
1031     {
1032         fUseUPnP = fMapPort;
1033         WriteSetting("fUseUPnP", fUseUPnP);
1034     }
1035     if (fUseUPnP && vnThreadsRunning[5] < 1)
1036     {
1037         if (!CreateThread(ThreadMapPort, NULL))
1038             printf("Error: ThreadMapPort(ThreadMapPort) failed\n");
1039     }
1040 }
1041 #else
1042 void MapPort(bool /* unused fMapPort */)
1043 {
1044     // Intentionally left blank.
1045 }
1046 #endif
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057 static const char *strDNSSeed[] = {
1058     "bitseed.xf2.org",
1059     "dnsseed.bluematt.me",
1060     "seed.bitcoin.sipa.be",
1061     "dnsseed.bitcoin.dashjr.org",
1062 };
1063
1064 void ThreadDNSAddressSeed(void* parg)
1065 {
1066     IMPLEMENT_RANDOMIZE_STACK(ThreadDNSAddressSeed(parg));
1067     try
1068     {
1069         vnThreadsRunning[6]++;
1070         ThreadDNSAddressSeed2(parg);
1071         vnThreadsRunning[6]--;
1072     }
1073     catch (std::exception& e) {
1074         vnThreadsRunning[6]--;
1075         PrintException(&e, "ThreadDNSAddressSeed()");
1076     } catch (...) {
1077         vnThreadsRunning[6]--;
1078         throw; // support pthread_cancel()
1079     }
1080     printf("ThreadDNSAddressSeed exiting\n");
1081 }
1082
1083 void ThreadDNSAddressSeed2(void* parg)
1084 {
1085     printf("ThreadDNSAddressSeed started\n");
1086     int found = 0;
1087
1088     if (!fTestNet)
1089     {
1090         printf("Loading addresses from DNS seeds (could take a while)\n");
1091
1092         for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
1093             vector<CNetAddr> vaddr;
1094             if (LookupHost(strDNSSeed[seed_idx], vaddr))
1095             {
1096                 CAddrDB addrDB;
1097                 addrDB.TxnBegin();
1098                 BOOST_FOREACH (CNetAddr& ip, vaddr)
1099                 {
1100                     if (ip.IsRoutable())
1101                     {
1102                         CAddress addr(CService(ip, GetDefaultPort()), NODE_NETWORK);
1103                         addr.nTime = 0;
1104                         AddAddress(addr, 0, &addrDB);
1105                         found++;
1106                     }
1107                 }
1108                 addrDB.TxnCommit();  // Save addresses (it's ok if this fails)
1109             }
1110         }
1111     }
1112
1113     printf("%d addresses found from DNS seeds\n", found);
1114 }
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127 unsigned int pnSeed[] =
1128 {
1129     0x959bd347, 0xf8de42b2, 0x73bc0518, 0xea6edc50, 0x21b00a4d, 0xc725b43d, 0xd665464d, 0x1a2a770e,
1130     0x27c93946, 0x65b2fa46, 0xb80ae255, 0x66b3b446, 0xb1877a3e, 0x6ee89e3e, 0xc3175b40, 0x2a01a83c,
1131     0x95b1363a, 0xa079ad3d, 0xe6ca801f, 0x027f4f4a, 0x34f7f03a, 0xf790f04a, 0x16ca801f, 0x2f4d5e40,
1132     0x3a4d5e40, 0xc43a322e, 0xc8159753, 0x14d4724c, 0x7919a118, 0xe0bdb34e, 0x68a16b2e, 0xff64b44d,
1133     0x6099115b, 0x9b57b05b, 0x7bd1b4ad, 0xdf95944f, 0x29d2b73d, 0xafa8db79, 0xe247ba41, 0x24078348,
1134     0xf722f03c, 0x33567ebc, 0xace64ed4, 0x984d3932, 0xb5f34e55, 0x27b7024d, 0x94579247, 0x8894042e,
1135     0x9357d34c, 0x1063c24b, 0xcaa228b1, 0xa3c5a8b2, 0x5dc64857, 0xa2c23643, 0xa8369a54, 0x31203077,
1136     0x00707c5c, 0x09fc0b3a, 0x272e9e2e, 0xf80f043e, 0x9449ca3e, 0x5512c33e, 0xd106b555, 0xe8024157,
1137     0xe288ec29, 0xc79c5461, 0xafb63932, 0xdb02ab4b, 0x0e512777, 0x8a145a4c, 0xb201ff4f, 0x5e09314b,
1138     0xcd9bfbcd, 0x1c023765, 0x4394e75c, 0xa728bd4d, 0x65331552, 0xa98420b1, 0x89ecf559, 0x6e80801f,
1139     0xf404f118, 0xefd62b51, 0x05918346, 0x9b186d5f, 0xacabab46, 0xf912e255, 0xc188ea62, 0xcc55734e,
1140     0xc668064d, 0xd77a4558, 0x46201c55, 0xf17dfc80, 0xf7142f2e, 0x87bfb718, 0x8aa54fb2, 0xc451d518,
1141     0xc4ae8831, 0x8dd44d55, 0x5bbd206c, 0x64536b5d, 0x5c667e60, 0x3b064242, 0xfe963a42, 0xa28e6dc8,
1142     0xe8a9604a, 0xc989464e, 0xd124a659, 0x50065140, 0xa44dfe5e, 0x1079e655, 0x3fb986d5, 0x47895b18,
1143     0x7d3ce4ad, 0x4561ba50, 0x296eec62, 0x255b41ad, 0xaed35ec9, 0x55556f12, 0xc7d3154d, 0x3297b65d,
1144     0x8930121f, 0xabf42e4e, 0x4a29e044, 0x1212685d, 0x676c1e40, 0xce009744, 0x383a8948, 0xa2dbd0ad,
1145     0xecc2564d, 0x07dbc252, 0x887ee24b, 0x5171644c, 0x6bb798c1, 0x847f495d, 0x4cbb7145, 0x3bb81c32,
1146     0x45eb262e, 0xc8015a4e, 0x250a361b, 0xf694f946, 0xd64a183e, 0xd4f1dd59, 0x8f20ffd4, 0x51d9e55c,
1147     0x09521763, 0x5e02002e, 0x32c8074d, 0xe685762e, 0x8290b0bc, 0x762a922e, 0xfc5ee754, 0x83a24829,
1148     0x775b224d, 0x6295bb4d, 0x38ec0555, 0xbffbba50, 0xe5560260, 0x86b16a7c, 0xd372234e, 0x49a3c24b,
1149     0x2f6a171f, 0x4d75ed60, 0xae94115b, 0xcb543744, 0x63080c59, 0x3f9c724c, 0xc977ce18, 0x532efb18,
1150     0x69dc3b2e, 0x5f94d929, 0x1732bb4d, 0x9c814b4d, 0xe6b3762e, 0xc024f662, 0x8face35b, 0x6b5b044d,
1151     0x798c7b57, 0x79a6b44c, 0x067d3057, 0xf9e94e5f, 0x91cbe15b, 0x71405eb2, 0x2662234e, 0xcbcc4a6d,
1152     0xbf69d54b, 0xa79b4e55, 0xec6d3e51, 0x7c0b3c02, 0x60f83653, 0x24c1e15c, 0x1110b62e, 0x10350f59,
1153     0xa56f1d55, 0x3509e7a9, 0xeb128354, 0x14268e2e, 0x934e28bc, 0x8e32692e, 0x8331a21f, 0x3e633932,
1154     0xc812b12e, 0xc684bf2e, 0x80112d2e, 0xe0ddc96c, 0xc630ca4a, 0x5c09b3b2, 0x0b580518, 0xc8e9d54b,
1155     0xd169aa43, 0x17d0d655, 0x1d029963, 0x7ff87559, 0xcb701f1f, 0x6fa3e85d, 0xe45e9a54, 0xf05d1802,
1156     0x44d03b2e, 0x837b692e, 0xccd4354e, 0x3d6da13c, 0x3423084d, 0xf707c34a, 0x55f6db3a, 0xad26e442,
1157     0x6233a21f, 0x09e80e59, 0x8caeb54d, 0xbe870941, 0xb407d20e, 0x20b51018, 0x56fb152e, 0x460d2a4e,
1158     0xbb9a2946, 0x560eb12e, 0xed83dd29, 0xd6724f53, 0xa50aafb8, 0x451346d9, 0x88348e2e, 0x7312fead,
1159     0x8ecaf96f, 0x1bda4e5f, 0xf1671e40, 0x3c8c3e3b, 0x4716324d, 0xdde24ede, 0xf98cd17d, 0xa91d4644,
1160     0x28124eb2, 0x147d5129, 0xd022042e, 0x61733d3b, 0xad0d5e02, 0x8ce2932e, 0xe5c18502, 0x549c1e32,
1161     0x9685801f, 0x86e217ad, 0xd948214b, 0x4110f462, 0x3a2e894e, 0xbd35492e, 0x87e0d558, 0x64b8ef7d,
1162     0x7c3eb962, 0x72a84b3e, 0x7cd667c9, 0x28370a2e, 0x4bc60e7b, 0x6fc1ec60, 0x14a6983f, 0x86739a4b,
1163     0x46954e5f, 0x32e2e15c, 0x2e9326cf, 0xe5801c5e, 0x379607b2, 0x32151145, 0xf0e39744, 0xacb54c55,
1164     0xa37dfb60, 0x83b55cc9, 0x388f7ca5, 0x15034f5f, 0x3e94965b, 0x68e0ffad, 0x35280f59, 0x8fe190cf,
1165     0x7c6ba5b2, 0xa5e9db43, 0x4ee1fc60, 0xd9d94e5f, 0x04040677, 0x0ea9b35e, 0x5961f14f, 0x67fda063,
1166     0xa48a5a31, 0xc6524e55, 0x283d325e, 0x3f37515f, 0x96b94b3e, 0xacce620e, 0x6481cc5b, 0xa4a06d4b,
1167     0x9e95d2d9, 0xe40c03d5, 0xc2f4514b, 0xb79aad44, 0xf64be843, 0xb2064070, 0xfca00455, 0x429dfa4e,
1168     0x2323f173, 0xeda4185e, 0xabd5227d, 0x9efd4d58, 0xb1104758, 0x4811e955, 0xbd9ab355, 0xe921f44b,
1169     0x9f166dce, 0x09e279b2, 0xe0c9ac7b, 0x7901a5ad, 0xa145d4b0, 0x79104671, 0xec31e35a, 0x4fe0b555,
1170     0xc7d9cbad, 0xad057f55, 0xe94cc759, 0x7fe0b043, 0xe4529f2e, 0x0d4dd4b2, 0x9f11a54d, 0x031e2e4e,
1171     0xe6014f5f, 0x11d1ca6c, 0x26bd7f61, 0xeb86854f, 0x4d347b57, 0x116bbe2e, 0xdba7234e, 0x7bcbfd2e,
1172     0x174dd4b2, 0x6686762e, 0xb089ba50, 0xc6258246, 0x087e767b, 0xc4a8cb4a, 0x595dba50, 0x7f0ae502,
1173     0x7b1dbd5a, 0xa0603492, 0x57d1af4b, 0x9e21ffd4, 0x6393064d, 0x7407376e, 0xe484762e, 0x122a4e53,
1174     0x4a37aa43, 0x3888a6be, 0xee77864e, 0x039c8dd5, 0x688d89af, 0x0e988f62, 0x08218246, 0xfc2f8246,
1175     0xd1d97040, 0xd64cd4b2, 0x5ae4a6b8, 0x7d0de9bc, 0x8d304d61, 0x06c5c672, 0xa4c8bd4d, 0xe0fd373b,
1176     0x575ebe4d, 0x72d26277, 0x55570f55, 0x77b154d9, 0xe214293a, 0xfc740f4b, 0xfe3f6a57, 0xa9c55f02,
1177     0xae4054db, 0x2394d918, 0xb511b24a, 0xb8741ab2, 0x0758e65e, 0xc7b5795b, 0xb0a30a4c, 0xaf7f170c,
1178     0xf3b4762e, 0x8179576d, 0x738a1581, 0x4b95b64c, 0x9829b618, 0x1bea932e, 0x7bdeaa4b, 0xcb5e0281,
1179     0x65618f54, 0x0658474b, 0x27066acf, 0x40556d65, 0x7d204d53, 0xf28bc244, 0xdce23455, 0xadc0ff54,
1180     0x3863c948, 0xcee34e5f, 0xdeb85e02, 0x2ed17a61, 0x6a7b094d, 0x7f0cfc40, 0x59603f54, 0x3220afbc,
1181     0xb5dfd962, 0x125d21c0, 0x13f8d243, 0xacfefb4e, 0x86c2c147, 0x3d8bbd59, 0xbd02a21f, 0x2593042e,
1182     0xc6a17a7c, 0x28925861, 0xb487ed44, 0xb5f4fd6d, 0x90c28a45, 0x5a14f74d, 0x43d71b4c, 0x728ebb5d,
1183     0x885bf950, 0x08134dd0, 0x38ec046e, 0xc575684b, 0x50082d2e, 0xa2f47757, 0x270f86ae, 0xf3ff6462,
1184     0x10ed3f4e, 0x4b58d462, 0xe01ce23e, 0x8c5b092e, 0x63e52f4e, 0x22c1e85d, 0xa908f54e, 0x8591624f,
1185     0x2c0fb94e, 0xa280ba3c, 0xb6f41b4c, 0x24f9aa47, 0x27201647, 0x3a3ea6dc, 0xa14fc3be, 0x3c34bdd5,
1186     0x5b8d4f5b, 0xaadeaf4b, 0xc71cab50, 0x15697a4c, 0x9a1a734c, 0x2a037d81, 0x2590bd59, 0x48ec2741,
1187     0x53489c5b, 0x7f00314b, 0x2170d362, 0xf2e92542, 0x42c10b44, 0x98f0f118, 0x883a3456, 0x099a932e,
1188     0xea38f7bc, 0x644e9247, 0xbb61b62e, 0x30e0863d, 0x5f51be54, 0x207215c7, 0x5f306c45, 0xaa7f3932,
1189     0x98da7d45, 0x4e339b59, 0x2e411581, 0xa808f618, 0xad2c0c59, 0x54476741, 0x09e99fd1, 0x5db8f752,
1190     0xc16df8bd, 0x1dd4b44f, 0x106edf2e, 0x9e15c180, 0x2ad6b56f, 0x633a5332, 0xff33787c, 0x077cb545,
1191     0x6610be6d, 0x75aad2c4, 0x72fb4d5b, 0xe81e0f59, 0x576f6332, 0x47333373, 0x351ed783, 0x2d90fb50,
1192     0x8d5e0f6c, 0x5b27a552, 0xdb293ebb, 0xe55ef950, 0x4b133ad8, 0x75df975a, 0x7b6a8740, 0xa899464b,
1193     0xfab15161, 0x10f8b64d, 0xd055ea4d, 0xee8e146b, 0x4b14afb8, 0x4bc1c44a, 0x9b961dcc, 0xd111ff43,
1194     0xfca0b745, 0xc800e412, 0x0afad9d1, 0xf751c350, 0xf9f0cccf, 0xa290a545, 0x8ef13763, 0x7ec70d59,
1195     0x2b066acf, 0x65496c45, 0xade02c1b, 0xae6eb077, 0x92c1e65b, 0xc064e6a9, 0xc649e56d, 0x5287a243,
1196     0x36de4f5b, 0x5b1df6ad, 0x65c39a59, 0xdba805b2, 0x20067aa8, 0x6457e56d, 0x3cee26cf, 0xfd3ff26d,
1197     0x04f86d4a, 0x06b8e048, 0xa93bcd5c, 0x91135852, 0xbe90a643, 0x8fa0094d, 0x06d8215f, 0x2677094d,
1198     0xd735685c, 0x164a00c9, 0x5209ac5f, 0xa9564c5c, 0x3b504f5f, 0xcc826bd0, 0x4615042e, 0x5fe13b4a,
1199     0x8c81b86d, 0x879ab68c, 0x1de564b8, 0x434487d8, 0x2dcb1b63, 0x82ab524a, 0xb0676abb, 0xa13d9c62,
1200     0xdbb5b86d, 0x5b7f4b59, 0xaddfb44d, 0xad773532, 0x3997054c, 0x72cebd89, 0xb194544c, 0xc5b8046e,
1201     0x6e1adeb2, 0xaa5abb51, 0xefb54b44, 0x15efc54f, 0xe9f1bc4d, 0x5f401b6c, 0x97f018ad, 0xc82f9252,
1202     0x2cdc762e, 0x8e52e56d, 0x1827175e, 0x9b7d7d80, 0xb2ad6845, 0x51065140, 0x71180a18, 0x5b27006c,
1203     0x0621e255, 0x721cbe58, 0x670c0cb8, 0xf8bd715d, 0xe0bdc5d9, 0xed843501, 0x4b84554d, 0x7f1a18bc,
1204     0x53bcaf47, 0x5729d35f, 0xf0dda246, 0x22382bd0, 0x4d641fb0, 0x316afcde, 0x50a22f1f, 0x73608046,
1205     0xc461d84a, 0xb2dbe247,
1206 };
1207
1208
1209
1210 void ThreadOpenConnections(void* parg)
1211 {
1212     IMPLEMENT_RANDOMIZE_STACK(ThreadOpenConnections(parg));
1213     try
1214     {
1215         vnThreadsRunning[1]++;
1216         ThreadOpenConnections2(parg);
1217         vnThreadsRunning[1]--;
1218     }
1219     catch (std::exception& e) {
1220         vnThreadsRunning[1]--;
1221         PrintException(&e, "ThreadOpenConnections()");
1222     } catch (...) {
1223         vnThreadsRunning[1]--;
1224         PrintException(NULL, "ThreadOpenConnections()");
1225     }
1226     printf("ThreadOpenConnections exiting\n");
1227 }
1228
1229 void ThreadOpenConnections2(void* parg)
1230 {
1231     printf("ThreadOpenConnections started\n");
1232
1233     // Connect to specific addresses
1234     if (mapArgs.count("-connect"))
1235     {
1236         for (int64 nLoop = 0;; nLoop++)
1237         {
1238             BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
1239             {
1240                 CAddress addr(CService(strAddr, GetDefaultPort(), fAllowDNS));
1241                 if (addr.IsValid())
1242                     OpenNetworkConnection(addr);
1243                 for (int i = 0; i < 10 && i < nLoop; i++)
1244                 {
1245                     Sleep(500);
1246                     if (fShutdown)
1247                         return;
1248                 }
1249             }
1250         }
1251     }
1252
1253     // Initiate network connections
1254     int64 nStart = GetTime();
1255     loop
1256     {
1257         // Limit outbound connections
1258         vnThreadsRunning[1]--;
1259         Sleep(500);
1260         loop
1261         {
1262             int nOutbound = 0;
1263             CRITICAL_BLOCK(cs_vNodes)
1264                 BOOST_FOREACH(CNode* pnode, vNodes)
1265                     if (!pnode->fInbound)
1266                         nOutbound++;
1267             int nMaxOutboundConnections = MAX_OUTBOUND_CONNECTIONS;
1268             nMaxOutboundConnections = min(nMaxOutboundConnections, (int)GetArg("-maxconnections", 125));
1269             if (nOutbound < nMaxOutboundConnections)
1270                 break;
1271             Sleep(2000);
1272             if (fShutdown)
1273                 return;
1274         }
1275         vnThreadsRunning[1]++;
1276         if (fShutdown)
1277             return;
1278
1279         bool fAddSeeds = false;
1280
1281         CRITICAL_BLOCK(cs_mapAddresses)
1282         {
1283             // Add seed nodes if IRC isn't working
1284             bool fTOR = (fUseProxy && addrProxy.GetPort() == 9050);
1285             if (mapAddresses.empty() && (GetTime() - nStart > 60 || fTOR) && !fTestNet)
1286                 fAddSeeds = true;
1287         }
1288
1289         if (fAddSeeds)
1290         {
1291             for (int i = 0; i < ARRAYLEN(pnSeed); i++)
1292             {
1293                 // It'll only connect to one or two seed nodes because once it connects,
1294                 // it'll get a pile of addresses with newer timestamps.
1295                 // Seed nodes are given a random 'last seen time' of between one and two
1296                 // weeks ago.
1297                 const int64 nOneWeek = 7*24*60*60;
1298                 struct in_addr ip;
1299                 memcpy(&ip, &pnSeed[i], sizeof(ip));
1300                 CAddress addr(CService(ip, GetDefaultPort()));
1301                 addr.nTime = GetTime()-GetRand(nOneWeek)-nOneWeek;
1302                 AddAddress(addr);
1303             }
1304         }
1305
1306         //
1307         // Choose an address to connect to based on most recently seen
1308         //
1309         CAddress addrConnect;
1310         int64 nBest = std::numeric_limits<int64>::min();
1311
1312         // Only connect to one address per a.b.?.? range.
1313         // Do this here so we don't have to critsect vNodes inside mapAddresses critsect.
1314         set<vector<unsigned char> > setConnected;
1315         CRITICAL_BLOCK(cs_vNodes)
1316             BOOST_FOREACH(CNode* pnode, vNodes)
1317                 setConnected.insert(pnode->addr.GetGroup());
1318
1319         int64 nANow = GetAdjustedTime();
1320
1321         CRITICAL_BLOCK(cs_mapAddresses)
1322         {
1323             BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
1324             {
1325                 const CAddress& addr = item.second;
1326                 if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.GetGroup()))
1327                     continue;
1328                 int64 nSinceLastSeen = nANow - addr.nTime;
1329                 int64 nSinceLastTry = nANow - addr.nLastTry;
1330
1331                 // Randomize the order in a deterministic way, putting the standard port first
1332                 int64 nRandomizer = (uint64)(nStart * 4951 + addr.nLastTry * 9567851 + addr.GetHash()) % (2 * 60 * 60);
1333                 if (addr.GetPort() != GetDefaultPort())
1334                     nRandomizer += 2 * 60 * 60;
1335
1336                 // Last seen  Base retry frequency
1337                 //   <1 hour   10 min
1338                 //    1 hour    1 hour
1339                 //    4 hours   2 hours
1340                 //   24 hours   5 hours
1341                 //   48 hours   7 hours
1342                 //    7 days   13 hours
1343                 //   30 days   27 hours
1344                 //   90 days   46 hours
1345                 //  365 days   93 hours
1346                 int64 nDelay = (int64)(3600.0 * sqrt(fabs((double)nSinceLastSeen) / 3600.0) + nRandomizer);
1347
1348                 // Fast reconnect for one hour after last seen
1349                 if (nSinceLastSeen < 60 * 60)
1350                     nDelay = 10 * 60;
1351
1352                 // Limit retry frequency
1353                 if (nSinceLastTry < nDelay)
1354                     continue;
1355
1356                 // If we have IRC, we'll be notified when they first come online,
1357                 // and again every 24 hours by the refresh broadcast.
1358                 if (nGotIRCAddresses > 0 && vNodes.size() >= 2 && nSinceLastSeen > 24 * 60 * 60)
1359                     continue;
1360
1361                 // Only try the old stuff if we don't have enough connections
1362                 if (vNodes.size() >= 8 && nSinceLastSeen > 24 * 60 * 60)
1363                     continue;
1364
1365                 // If multiple addresses are ready, prioritize by time since
1366                 // last seen and time since last tried.
1367                 int64 nScore = min(nSinceLastTry, (int64)24 * 60 * 60) - nSinceLastSeen - nRandomizer;
1368                 if (nScore > nBest)
1369                 {
1370                     nBest = nScore;
1371                     addrConnect = addr;
1372                 }
1373             }
1374         }
1375
1376         if (addrConnect.IsValid())
1377             OpenNetworkConnection(addrConnect);
1378     }
1379 }
1380
1381 void ThreadOpenAddedConnections(void* parg)
1382 {
1383     IMPLEMENT_RANDOMIZE_STACK(ThreadOpenAddedConnections(parg));
1384     try
1385     {
1386         vnThreadsRunning[7]++;
1387         ThreadOpenAddedConnections2(parg);
1388         vnThreadsRunning[7]--;
1389     }
1390     catch (std::exception& e) {
1391         vnThreadsRunning[7]--;
1392         PrintException(&e, "ThreadOpenAddedConnections()");
1393     } catch (...) {
1394         vnThreadsRunning[7]--;
1395         PrintException(NULL, "ThreadOpenAddedConnections()");
1396     }
1397     printf("ThreadOpenAddedConnections exiting\n");
1398 }
1399
1400 void ThreadOpenAddedConnections2(void* parg)
1401 {
1402     printf("ThreadOpenAddedConnections started\n");
1403
1404     if (mapArgs.count("-addnode") == 0)
1405         return;
1406
1407     vector<vector<CService> > vservAddressesToAdd(0);
1408     BOOST_FOREACH(string& strAddNode, mapMultiArgs["-addnode"])
1409     {
1410         vector<CService> vservNode(0);
1411         if(Lookup(strAddNode.c_str(), vservNode, GetDefaultPort(), fAllowDNS, 0))
1412         {
1413             vservAddressesToAdd.push_back(vservNode);
1414             CRITICAL_BLOCK(cs_setservAddNodeAddresses)
1415                 BOOST_FOREACH(CService& serv, vservNode)
1416                     setservAddNodeAddresses.insert(serv);
1417         }
1418     }
1419     loop
1420     {
1421         vector<vector<CService> > vservConnectAddresses = vservAddressesToAdd;
1422         // Attempt to connect to each IP for each addnode entry until at least one is successful per addnode entry
1423         // (keeping in mind that addnode entries can have many IPs if fAllowDNS)
1424         CRITICAL_BLOCK(cs_vNodes)
1425             BOOST_FOREACH(CNode* pnode, vNodes)
1426                 for (vector<vector<CService> >::iterator it = vservConnectAddresses.begin(); it != vservConnectAddresses.end(); it++)
1427                     BOOST_FOREACH(CService& addrNode, *(it))
1428                         if (pnode->addr == addrNode)
1429                         {
1430                             it = vservConnectAddresses.erase(it);
1431                             it--;
1432                             break;
1433                         }
1434         BOOST_FOREACH(vector<CService>& vserv, vservConnectAddresses)
1435         {
1436             OpenNetworkConnection(CAddress(*(vserv.begin())));
1437             Sleep(500);
1438             if (fShutdown)
1439                 return;
1440         }
1441         if (fShutdown)
1442             return;
1443         vnThreadsRunning[7]--;
1444         Sleep(120000); // Retry every 2 minutes
1445         vnThreadsRunning[7]++;
1446         if (fShutdown)
1447             return;
1448     }
1449 }
1450
1451 bool OpenNetworkConnection(const CAddress& addrConnect)
1452 {
1453     //
1454     // Initiate outbound network connection
1455     //
1456     if (fShutdown)
1457         return false;
1458     if ((CNetAddr)addrConnect == (CNetAddr)addrLocalHost || !addrConnect.IsIPv4() ||
1459         FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect))
1460         return false;
1461
1462     vnThreadsRunning[1]--;
1463     CNode* pnode = ConnectNode(addrConnect);
1464     vnThreadsRunning[1]++;
1465     if (fShutdown)
1466         return false;
1467     if (!pnode)
1468         return false;
1469     pnode->fNetworkNode = true;
1470
1471     return true;
1472 }
1473
1474
1475
1476
1477
1478
1479
1480
1481 void ThreadMessageHandler(void* parg)
1482 {
1483     IMPLEMENT_RANDOMIZE_STACK(ThreadMessageHandler(parg));
1484     try
1485     {
1486         vnThreadsRunning[2]++;
1487         ThreadMessageHandler2(parg);
1488         vnThreadsRunning[2]--;
1489     }
1490     catch (std::exception& e) {
1491         vnThreadsRunning[2]--;
1492         PrintException(&e, "ThreadMessageHandler()");
1493     } catch (...) {
1494         vnThreadsRunning[2]--;
1495         PrintException(NULL, "ThreadMessageHandler()");
1496     }
1497     printf("ThreadMessageHandler exiting\n");
1498 }
1499
1500 void ThreadMessageHandler2(void* parg)
1501 {
1502     printf("ThreadMessageHandler started\n");
1503     SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
1504     while (!fShutdown)
1505     {
1506         vector<CNode*> vNodesCopy;
1507         CRITICAL_BLOCK(cs_vNodes)
1508         {
1509             vNodesCopy = vNodes;
1510             BOOST_FOREACH(CNode* pnode, vNodesCopy)
1511                 pnode->AddRef();
1512         }
1513
1514         // Poll the connected nodes for messages
1515         CNode* pnodeTrickle = NULL;
1516         if (!vNodesCopy.empty())
1517             pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
1518         BOOST_FOREACH(CNode* pnode, vNodesCopy)
1519         {
1520             // Receive messages
1521             TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
1522                 ProcessMessages(pnode);
1523             if (fShutdown)
1524                 return;
1525
1526             // Send messages
1527             TRY_CRITICAL_BLOCK(pnode->cs_vSend)
1528                 SendMessages(pnode, pnode == pnodeTrickle);
1529             if (fShutdown)
1530                 return;
1531         }
1532
1533         CRITICAL_BLOCK(cs_vNodes)
1534         {
1535             BOOST_FOREACH(CNode* pnode, vNodesCopy)
1536                 pnode->Release();
1537         }
1538
1539         // Wait and allow messages to bunch up.
1540         // Reduce vnThreadsRunning so StopNode has permission to exit while
1541         // we're sleeping, but we must always check fShutdown after doing this.
1542         vnThreadsRunning[2]--;
1543         Sleep(100);
1544         if (fRequestShutdown)
1545             Shutdown(NULL);
1546         vnThreadsRunning[2]++;
1547         if (fShutdown)
1548             return;
1549     }
1550 }
1551
1552
1553
1554
1555
1556
1557 bool BindListenPort(string& strError)
1558 {
1559     strError = "";
1560     int nOne = 1;
1561     addrLocalHost.SetPort(GetListenPort());
1562
1563 #ifdef WIN32
1564     // Initialize Windows Sockets
1565     WSADATA wsadata;
1566     int ret = WSAStartup(MAKEWORD(2,2), &wsadata);
1567     if (ret != NO_ERROR)
1568     {
1569         strError = strprintf("Error: TCP/IP socket library failed to start (WSAStartup returned error %d)", ret);
1570         printf("%s\n", strError.c_str());
1571         return false;
1572     }
1573 #endif
1574
1575     // Create socket for listening for incoming connections
1576     hListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1577     if (hListenSocket == INVALID_SOCKET)
1578     {
1579         strError = strprintf("Error: Couldn't open socket for incoming connections (socket returned error %d)", WSAGetLastError());
1580         printf("%s\n", strError.c_str());
1581         return false;
1582     }
1583
1584 #ifdef SO_NOSIGPIPE
1585     // Different way of disabling SIGPIPE on BSD
1586     setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
1587 #endif
1588
1589 #ifndef WIN32
1590     // Allow binding if the port is still in TIME_WAIT state after
1591     // the program was closed and restarted.  Not an issue on windows.
1592     setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int));
1593 #endif
1594
1595 #ifdef WIN32
1596     // Set to nonblocking, incoming connections will also inherit this
1597     if (ioctlsocket(hListenSocket, FIONBIO, (u_long*)&nOne) == SOCKET_ERROR)
1598 #else
1599     if (fcntl(hListenSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
1600 #endif
1601     {
1602         strError = strprintf("Error: Couldn't set properties on socket for incoming connections (error %d)", WSAGetLastError());
1603         printf("%s\n", strError.c_str());
1604         return false;
1605     }
1606
1607     // The sockaddr_in structure specifies the address family,
1608     // IP address, and port for the socket that is being bound
1609     struct sockaddr_in sockaddr;
1610     memset(&sockaddr, 0, sizeof(sockaddr));
1611     sockaddr.sin_family = AF_INET;
1612     sockaddr.sin_addr.s_addr = INADDR_ANY; // bind to all IPs on this computer
1613     sockaddr.sin_port = htons(GetListenPort());
1614     if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
1615     {
1616         int nErr = WSAGetLastError();
1617         if (nErr == WSAEADDRINUSE)
1618             strError = strprintf(_("Unable to bind to port %d on this computer.  Bitcoin is probably already running."), ntohs(sockaddr.sin_port));
1619         else
1620             strError = strprintf("Error: Unable to bind to port %d on this computer (bind returned error %d)", ntohs(sockaddr.sin_port), nErr);
1621         printf("%s\n", strError.c_str());
1622         return false;
1623     }
1624     printf("Bound to port %d\n", ntohs(sockaddr.sin_port));
1625
1626     // Listen for incoming connections
1627     if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR)
1628     {
1629         strError = strprintf("Error: Listening for incoming connections failed (listen returned error %d)", WSAGetLastError());
1630         printf("%s\n", strError.c_str());
1631         return false;
1632     }
1633
1634     return true;
1635 }
1636
1637 void StartNode(void* parg)
1638 {
1639     if (pnodeLocalHost == NULL)
1640         pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress(CService("127.0.0.1", 0), nLocalServices));
1641
1642 #ifdef WIN32
1643     // Get local host ip
1644     char pszHostName[1000] = "";
1645     if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR)
1646     {
1647         vector<CNetAddr> vaddr;
1648         if (LookupHost(pszHostName, vaddr))
1649             BOOST_FOREACH (const CNetAddr &addr, vaddr)
1650                 if (!addr.IsLocal())
1651                 {
1652                     addrLocalHost.SetIP(addr);
1653                     break;
1654                 }
1655     }
1656 #else
1657     // Get local host ip
1658     struct ifaddrs* myaddrs;
1659     if (getifaddrs(&myaddrs) == 0)
1660     {
1661         for (struct ifaddrs* ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next)
1662         {
1663             if (ifa->ifa_addr == NULL) continue;
1664             if ((ifa->ifa_flags & IFF_UP) == 0) continue;
1665             if (strcmp(ifa->ifa_name, "lo") == 0) continue;
1666             if (strcmp(ifa->ifa_name, "lo0") == 0) continue;
1667             char pszIP[100];
1668             if (ifa->ifa_addr->sa_family == AF_INET)
1669             {
1670                 struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr);
1671                 if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s4->sin_addr), pszIP, sizeof(pszIP)) != NULL)
1672                     printf("ipv4 %s: %s\n", ifa->ifa_name, pszIP);
1673
1674                 // Take the first IP that isn't loopback 127.x.x.x
1675                 CAddress addr(CService(s4->sin_addr, GetListenPort()), nLocalServices);
1676                 if (addr.IsValid() && !addr.IsLocal())
1677                 {
1678                     addrLocalHost = addr;
1679                     break;
1680                 }
1681             }
1682             else if (ifa->ifa_addr->sa_family == AF_INET6)
1683             {
1684                 struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr);
1685                 if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s6->sin6_addr), pszIP, sizeof(pszIP)) != NULL)
1686                     printf("ipv6 %s: %s\n", ifa->ifa_name, pszIP);
1687             }
1688         }
1689         freeifaddrs(myaddrs);
1690     }
1691 #endif
1692     printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
1693
1694     if (fUseProxy || mapArgs.count("-connect") || fNoListen)
1695     {
1696         // Proxies can't take incoming connections
1697         addrLocalHost.SetIP(CNetAddr("0.0.0.0"));
1698         printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
1699     }
1700     else
1701     {
1702         CreateThread(ThreadGetMyExternalIP, NULL);
1703     }
1704
1705     //
1706     // Start threads
1707     //
1708
1709     if (!GetBoolArg("-dnsseed", true))
1710         printf("DNS seeding disabled\n");
1711     else
1712         if (!CreateThread(ThreadDNSAddressSeed, NULL))
1713             printf("Error: CreateThread(ThreadDNSAddressSeed) failed\n");
1714
1715     // Map ports with UPnP
1716     if (fHaveUPnP)
1717         MapPort(fUseUPnP);
1718
1719     // Get addresses from IRC and advertise ours
1720     if (!CreateThread(ThreadIRCSeed, NULL))
1721         printf("Error: CreateThread(ThreadIRCSeed) failed\n");
1722
1723     // Send and receive from sockets, accept connections
1724     if (!CreateThread(ThreadSocketHandler, NULL))
1725         printf("Error: CreateThread(ThreadSocketHandler) failed\n");
1726
1727     // Initiate outbound connections from -addnode
1728     if (!CreateThread(ThreadOpenAddedConnections, NULL))
1729         printf("Error: CreateThread(ThreadOpenAddedConnections) failed\n");
1730
1731     // Initiate outbound connections
1732     if (!CreateThread(ThreadOpenConnections, NULL))
1733         printf("Error: CreateThread(ThreadOpenConnections) failed\n");
1734
1735     // Process messages
1736     if (!CreateThread(ThreadMessageHandler, NULL))
1737         printf("Error: CreateThread(ThreadMessageHandler) failed\n");
1738
1739     // Generate coins in the background
1740     GenerateBitcoins(fGenerateBitcoins, pwalletMain);
1741 }
1742
1743 bool StopNode()
1744 {
1745     printf("StopNode()\n");
1746     fShutdown = true;
1747     nTransactionsUpdated++;
1748     int64 nStart = GetTime();
1749     while (vnThreadsRunning[0] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0
1750         || (fHaveUPnP && vnThreadsRunning[5] > 0) || vnThreadsRunning[6] > 0 || vnThreadsRunning[7] > 0
1751     )
1752     {
1753         if (GetTime() - nStart > 20)
1754             break;
1755         Sleep(20);
1756     }
1757     if (vnThreadsRunning[0] > 0) printf("ThreadSocketHandler still running\n");
1758     if (vnThreadsRunning[1] > 0) printf("ThreadOpenConnections still running\n");
1759     if (vnThreadsRunning[2] > 0) printf("ThreadMessageHandler still running\n");
1760     if (vnThreadsRunning[3] > 0) printf("ThreadBitcoinMiner still running\n");
1761     if (vnThreadsRunning[4] > 0) printf("ThreadRPCServer still running\n");
1762     if (fHaveUPnP && vnThreadsRunning[5] > 0) printf("ThreadMapPort still running\n");
1763     if (vnThreadsRunning[6] > 0) printf("ThreadDNSAddressSeed still running\n");
1764     if (vnThreadsRunning[7] > 0) printf("ThreadOpenAddedConnections still running\n");
1765     while (vnThreadsRunning[2] > 0 || vnThreadsRunning[4] > 0)
1766         Sleep(20);
1767     Sleep(50);
1768
1769     return true;
1770 }
1771
1772 class CNetCleanup
1773 {
1774 public:
1775     CNetCleanup()
1776     {
1777     }
1778     ~CNetCleanup()
1779     {
1780         // Close sockets
1781         BOOST_FOREACH(CNode* pnode, vNodes)
1782             if (pnode->hSocket != INVALID_SOCKET)
1783                 closesocket(pnode->hSocket);
1784         if (hListenSocket != INVALID_SOCKET)
1785             if (closesocket(hListenSocket) == SOCKET_ERROR)
1786                 printf("closesocket(hListenSocket) failed with error %d\n", WSAGetLastError());
1787
1788 #ifdef WIN32
1789         // Shutdown Windows Sockets
1790         WSACleanup();
1791 #endif
1792     }
1793 }
1794 instance_of_cnetcleanup;