src/net.cpp

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2011 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 __WXMSW__
  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 #ifdef USE_UPNP
  33 void ThreadMapPort2(void* parg);
  34 #endif
  35 void ThreadDNSAddressSeed2(void* parg);
  36 bool OpenNetworkConnection(const CAddress& addrConnect);
  37
  38
  39
  40
  41
  42 //
  43 // Global state variables
  44 //
  45 bool fClient = false;
  46 bool fAllowDNS = false;
  47 uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
  48 CAddress addrLocalHost("0.0.0.0", 0, false, nLocalServices);
  49 static CNode* pnodeLocalHost = NULL;
  50 uint64 nLocalHostNonce = 0;
  51 array<int, 10> vnThreadsRunning;
  52 static SOCKET hListenSocket = INVALID_SOCKET;
  53
  54 vector<CNode*> vNodes;
  55 CCriticalSection cs_vNodes;
  56 map<vector<unsigned char>, CAddress> mapAddresses;
  57 CCriticalSection cs_mapAddresses;
  58 map<CInv, CDataStream> mapRelay;
  59 deque<pair<int64, CInv> > vRelayExpiration;
  60 CCriticalSection cs_mapRelay;
  61 map<CInv, int64> mapAlreadyAskedFor;
  62
  63 // Settings
  64 int fUseProxy = false;
  65 int nConnectTimeout = 5000;
  66 CAddress addrProxy("127.0.0.1",9050);
  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 ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout)
  92 {
  93     hSocketRet = INVALID_SOCKET;
  94
  95     SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  96     if (hSocket == INVALID_SOCKET)
  97         return false;
  98 #ifdef SO_NOSIGPIPE
  99     int set = 1;
 100     setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
 101 #endif
 102
 103     bool fProxy = (fUseProxy && addrConnect.IsRoutable());
 104     struct sockaddr_in sockaddr = (fProxy ? addrProxy.GetSockAddr() : addrConnect.GetSockAddr());
 105
 106 #ifdef __WXMSW__
 107     u_long fNonblock = 1;
 108     if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
 109 #else
 110     int fFlags = fcntl(hSocket, F_GETFL, 0);
 111     if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
 112 #endif
 113     {
 114         closesocket(hSocket);
 115         return false;
 116     }
 117
 118
 119     if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
 120     {
 121         // WSAEINVAL is here because some legacy version of winsock uses it
 122         if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
 123         {
 124             struct timeval timeout;
 125             timeout.tv_sec  = nTimeout / 1000;
 126             timeout.tv_usec = (nTimeout % 1000) * 1000;
 127
 128             fd_set fdset;
 129             FD_ZERO(&fdset);
 130             FD_SET(hSocket, &fdset);
 131             int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
 132             if (nRet == 0)
 133             {
 134                 printf("connection timeout\n");
 135                 closesocket(hSocket);
 136                 return false;
 137             }
 138             if (nRet == SOCKET_ERROR)
 139             {
 140                 printf("select() for connection failed: %i\n",WSAGetLastError());
 141                 closesocket(hSocket);
 142                 return false;
 143             }
 144             socklen_t nRetSize = sizeof(nRet);
 145 #ifdef __WXMSW__
 146             if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
 147 #else
 148             if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
 149 #endif
 150             {
 151                 printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
 152                 closesocket(hSocket);
 153                 return false;
 154             }
 155             if (nRet != 0)
 156             {
 157                 printf("connect() failed after select(): %s\n",strerror(nRet));
 158                 closesocket(hSocket);
 159                 return false;
 160             }
 161         }
 162 #ifdef __WXMSW__
 163         else if (WSAGetLastError() != WSAEISCONN)
 164 #else
 165         else
 166 #endif
 167         {
 168             printf("connect() failed: %i\n",WSAGetLastError());
 169             closesocket(hSocket);
 170             return false;
 171         }
 172     }
 173
 174     /*
 175     this isn't even strictly necessary
 176     CNode::ConnectNode immediately turns the socket back to non-blocking
 177     but we'll turn it back to blocking just in case
 178     */
 179 #ifdef __WXMSW__
 180     fNonblock = 0;
 181     if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
 182 #else
 183     fFlags = fcntl(hSocket, F_GETFL, 0);
 184     if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
 185 #endif
 186     {
 187         closesocket(hSocket);
 188         return false;
 189     }
 190
 191     if (fProxy)
 192     {
 193         printf("proxy connecting %s\n", addrConnect.ToString().c_str());
 194         char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
 195         memcpy(pszSocks4IP + 2, &addrConnect.port, 2);
 196         memcpy(pszSocks4IP + 4, &addrConnect.ip, 4);
 197         char* pszSocks4 = pszSocks4IP;
 198         int nSize = sizeof(pszSocks4IP);
 199
 200         int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
 201         if (ret != nSize)
 202         {
 203             closesocket(hSocket);
 204             return error("Error sending to proxy");
 205         }
 206         char pchRet[8];
 207         if (recv(hSocket, pchRet, 8, 0) != 8)
 208         {
 209             closesocket(hSocket);
 210             return error("Error reading proxy response");
 211         }
 212         if (pchRet[1] != 0x5a)
 213         {
 214             closesocket(hSocket);
 215             if (pchRet[1] != 0x5b)
 216                 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
 217             return false;
 218         }
 219         printf("proxy connected %s\n", addrConnect.ToString().c_str());
 220     }
 221
 222     hSocketRet = hSocket;
 223     return true;
 224 }
 225
 226 // portDefault is in host order
 227 bool Lookup(const char *pszName, vector<CAddress>& vaddr, int nServices, int nMaxSolutions, bool fAllowLookup, int portDefault, bool fAllowPort)
 228 {
 229     vaddr.clear();
 230     if (pszName[0] == 0)
 231         return false;
 232     int port = portDefault;
 233     char psz[256];
 234     char *pszHost = psz;
 235     strlcpy(psz, pszName, sizeof(psz));
 236     if (fAllowPort)
 237     {
 238         char* pszColon = strrchr(psz+1,':');
 239         char *pszPortEnd = NULL;
 240         int portParsed = pszColon ? strtoul(pszColon+1, &pszPortEnd, 10) : 0;
 241         if (pszColon && pszPortEnd && pszPortEnd[0] == 0)
 242         {
 243             if (psz[0] == '[' && pszColon[-1] == ']')
 244             {
 245                 // Future: enable IPv6 colon-notation inside []
 246                 pszHost = psz+1;
 247                 pszColon[-1] = 0;
 248             }
 249             else
 250                 pszColon[0] = 0;
 251             port = portParsed;
 252             if (port < 0 || port > USHRT_MAX)
 253                 port = USHRT_MAX;
 254         }
 255     }
 256
 257     unsigned int addrIP = inet_addr(pszHost);
 258     if (addrIP != INADDR_NONE)
 259     {
 260         // valid IP address passed
 261         vaddr.push_back(CAddress(addrIP, port, nServices));
 262         return true;
 263     }
 264
 265     if (!fAllowLookup)
 266         return false;
 267
 268     struct hostent* phostent = gethostbyname(pszHost);
 269     if (!phostent)
 270         return false;
 271
 272     if (phostent->h_addrtype != AF_INET)
 273         return false;
 274
 275     char** ppAddr = phostent->h_addr_list;
 276     while (*ppAddr != NULL && vaddr.size() != nMaxSolutions)
 277     {
 278         CAddress addr(((struct in_addr*)ppAddr[0])->s_addr, port, nServices);
 279         if (addr.IsValid())
 280             vaddr.push_back(addr);
 281         ppAddr++;
 282     }
 283
 284     return (vaddr.size() > 0);
 285 }
 286
 287 // portDefault is in host order
 288 bool Lookup(const char *pszName, CAddress& addr, int nServices, bool fAllowLookup, int portDefault, bool fAllowPort)
 289 {
 290     vector<CAddress> vaddr;
 291     bool fRet = Lookup(pszName, vaddr, nServices, 1, fAllowLookup, portDefault, fAllowPort);
 292     if (fRet)
 293         addr = vaddr[0];
 294     return fRet;
 295 }
 296
 297 bool GetMyExternalIP2(const CAddress& addrConnect, const char* pszGet, const char* pszKeyword, unsigned int& ipRet)
 298 {
 299     SOCKET hSocket;
 300     if (!ConnectSocket(addrConnect, hSocket))
 301         return error("GetMyExternalIP() : connection to %s failed", addrConnect.ToString().c_str());
 302
 303     send(hSocket, pszGet, strlen(pszGet), MSG_NOSIGNAL);
 304
 305     string strLine;
 306     while (RecvLine(hSocket, strLine))
 307     {
 308         if (strLine.empty()) // HTTP response is separated from headers by blank line
 309         {
 310             loop
 311             {
 312                 if (!RecvLine(hSocket, strLine))
 313                 {
 314                     closesocket(hSocket);
 315                     return false;
 316                 }
 317                 if (pszKeyword == NULL)
 318                     break;
 319                 if (strLine.find(pszKeyword) != -1)
 320                 {
 321                     strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword));
 322                     break;
 323                 }
 324             }
 325             closesocket(hSocket);
 326             if (strLine.find("<") != -1)
 327                 strLine = strLine.substr(0, strLine.find("<"));
 328             strLine = strLine.substr(strspn(strLine.c_str(), " \t\n\r"));
 329             while (strLine.size() > 0 && isspace(strLine[strLine.size()-1]))
 330                 strLine.resize(strLine.size()-1);
 331             CAddress addr(strLine,0,true);
 332             printf("GetMyExternalIP() received [%s] %s\n", strLine.c_str(), addr.ToString().c_str());
 333             if (addr.ip == 0 || addr.ip == INADDR_NONE || !addr.IsRoutable())
 334                 return false;
 335             ipRet = addr.ip;
 336             return true;
 337         }
 338     }
 339     closesocket(hSocket);
 340     return error("GetMyExternalIP() : connection closed");
 341 }
 342
 343 // We now get our external IP from the IRC server first and only use this as a backup
 344 bool GetMyExternalIP(unsigned int& ipRet)
 345 {
 346     CAddress addrConnect;
 347     const char* pszGet;
 348     const char* pszKeyword;
 349
 350     if (fUseProxy)
 351         return false;
 352
 353     for (int nLookup = 0; nLookup <= 1; nLookup++)
 354     for (int nHost = 1; nHost <= 2; nHost++)
 355     {
 356         // We should be phasing out our use of sites like these.  If we need
 357         // replacements, we should ask for volunteers to put this simple
 358         // php file on their webserver that prints the client IP:
 359         //  <?php echo $_SERVER["REMOTE_ADDR"]; ?>
 360         if (nHost == 1)
 361         {
 362             addrConnect = CAddress("91.198.22.70",80); // checkip.dyndns.org
 363
 364             if (nLookup == 1)
 365             {
 366                 CAddress addrIP("checkip.dyndns.org", 80, true);
 367                 if (addrIP.IsValid())
 368                     addrConnect = addrIP;
 369             }
 370
 371             pszGet = "GET / HTTP/1.1\r\n"
 372                      "Host: checkip.dyndns.org\r\n"
 373                      "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
 374                      "Connection: close\r\n"
 375                      "\r\n";
 376
 377             pszKeyword = "Address:";
 378         }
 379         else if (nHost == 2)
 380         {
 381             addrConnect = CAddress("74.208.43.192", 80); // www.showmyip.com
 382
 383             if (nLookup == 1)
 384             {
 385                 CAddress addrIP("www.showmyip.com", 80, true);
 386                 if (addrIP.IsValid())
 387                     addrConnect = addrIP;
 388             }
 389
 390             pszGet = "GET /simple/ HTTP/1.1\r\n"
 391                      "Host: www.showmyip.com\r\n"
 392                      "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
 393                      "Connection: close\r\n"
 394                      "\r\n";
 395
 396             pszKeyword = NULL; // Returns just IP address
 397         }
 398
 399         if (GetMyExternalIP2(addrConnect, pszGet, pszKeyword, ipRet))
 400             return true;
 401     }
 402
 403     return false;
 404 }
 405
 406 void ThreadGetMyExternalIP(void* parg)
 407 {
 408     // Wait for IRC to get it first
 409     if (!GetBoolArg("-noirc"))
 410     {
 411         for (int i = 0; i < 2 * 60; i++)
 412         {
 413             Sleep(1000);
 414             if (fGotExternalIP || fShutdown)
 415                 return;
 416         }
 417     }
 418
 419     // Fallback in case IRC fails to get it
 420     if (GetMyExternalIP(addrLocalHost.ip))
 421     {
 422         printf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP().c_str());
 423         if (addrLocalHost.IsRoutable())
 424         {
 425             // If we already connected to a few before we had our IP, go back and addr them.
 426             // setAddrKnown automatically filters any duplicate sends.
 427             CAddress addr(addrLocalHost);
 428             addr.nTime = GetAdjustedTime();
 429             CRITICAL_BLOCK(cs_vNodes)
 430                 BOOST_FOREACH(CNode* pnode, vNodes)
 431                     pnode->PushAddress(addr);
 432         }
 433     }
 434 }
 435
 436
 437
 438
 439
 440 bool AddAddress(CAddress addr, int64 nTimePenalty, CAddrDB *pAddrDB)
 441 {
 442     if (!addr.IsRoutable())
 443         return false;
 444     if (addr.ip == addrLocalHost.ip)
 445         return false;
 446     addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty);
 447     bool fUpdated = false;
 448     bool fNew = false;
 449     CAddress addrFound = addr;
 450
 451     CRITICAL_BLOCK(cs_mapAddresses)
 452     {
 453         map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
 454         if (it == mapAddresses.end())
 455         {
 456             // New address
 457             printf("AddAddress(%s)\n", addr.ToString().c_str());
 458             mapAddresses.insert(make_pair(addr.GetKey(), addr));
 459             fUpdated = true;
 460             fNew = true;
 461         }
 462         else
 463         {
 464             addrFound = (*it).second;
 465             if ((addrFound.nServices | addr.nServices) != addrFound.nServices)
 466             {
 467                 // Services have been added
 468                 addrFound.nServices |= addr.nServices;
 469                 fUpdated = true;
 470             }
 471             bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60);
 472             int64 nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60);
 473             if (addrFound.nTime < addr.nTime - nUpdateInterval)
 474             {
 475                 // Periodically update most recently seen time
 476                 addrFound.nTime = addr.nTime;
 477                 fUpdated = true;
 478             }
 479         }
 480     }
 481     // There is a nasty deadlock bug if this is done inside the cs_mapAddresses
 482     // CRITICAL_BLOCK:
 483     // Thread 1:  begin db transaction (locks inside-db-mutex)
 484     //            then AddAddress (locks cs_mapAddresses)
 485     // Thread 2:  AddAddress (locks cs_mapAddresses)
 486     //             ... then db operation hangs waiting for inside-db-mutex
 487     if (fUpdated)
 488     {
 489         if (pAddrDB)
 490             pAddrDB->WriteAddress(addrFound);
 491         else
 492             CAddrDB().WriteAddress(addrFound);
 493     }
 494     return fNew;
 495 }
 496
 497 void AddressCurrentlyConnected(const CAddress& addr)
 498 {
 499     CAddress *paddrFound = NULL;
 500
 501     CRITICAL_BLOCK(cs_mapAddresses)
 502     {
 503         // Only if it's been published already
 504         map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
 505         if (it != mapAddresses.end())
 506             paddrFound = &(*it).second;
 507     }
 508
 509     if (paddrFound)
 510     {
 511         int64 nUpdateInterval = 20 * 60;
 512         if (paddrFound->nTime < GetAdjustedTime() - nUpdateInterval)
 513         {
 514             // Periodically update most recently seen time
 515             paddrFound->nTime = GetAdjustedTime();
 516             CAddrDB addrdb;
 517             addrdb.WriteAddress(*paddrFound);
 518         }
 519     }
 520 }
 521
 522
 523
 524
 525
 526 void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1)
 527 {
 528     // If the dialog might get closed before the reply comes back,
 529     // call this in the destructor so it doesn't get called after it's deleted.
 530     CRITICAL_BLOCK(cs_vNodes)
 531     {
 532         BOOST_FOREACH(CNode* pnode, vNodes)
 533         {
 534             CRITICAL_BLOCK(pnode->cs_mapRequests)
 535             {
 536                 for (map<uint256, CRequestTracker>::iterator mi = pnode->mapRequests.begin(); mi != pnode->mapRequests.end();)
 537                 {
 538                     CRequestTracker& tracker = (*mi).second;
 539                     if (tracker.fn == fn && tracker.param1 == param1)
 540                         pnode->mapRequests.erase(mi++);
 541                     else
 542                         mi++;
 543                 }
 544             }
 545         }
 546     }
 547 }
 548
 549
 550
 551
 552
 553
 554
 555 //
 556 // Subscription methods for the broadcast and subscription system.
 557 // Channel numbers are message numbers, i.e. MSG_TABLE and MSG_PRODUCT.
 558 //
 559 // The subscription system uses a meet-in-the-middle strategy.
 560 // With 100,000 nodes, if senders broadcast to 1000 random nodes and receivers
 561 // subscribe to 1000 random nodes, 99.995% (1 - 0.99^1000) of messages will get through.
 562 //
 563
 564 bool AnySubscribed(unsigned int nChannel)
 565 {
 566     if (pnodeLocalHost->IsSubscribed(nChannel))
 567         return true;
 568     CRITICAL_BLOCK(cs_vNodes)
 569         BOOST_FOREACH(CNode* pnode, vNodes)
 570             if (pnode->IsSubscribed(nChannel))
 571                 return true;
 572     return false;
 573 }
 574
 575 bool CNode::IsSubscribed(unsigned int nChannel)
 576 {
 577     if (nChannel >= vfSubscribe.size())
 578         return false;
 579     return vfSubscribe[nChannel];
 580 }
 581
 582 void CNode::Subscribe(unsigned int nChannel, unsigned int nHops)
 583 {
 584     if (nChannel >= vfSubscribe.size())
 585         return;
 586
 587     if (!AnySubscribed(nChannel))
 588     {
 589         // Relay subscribe
 590         CRITICAL_BLOCK(cs_vNodes)
 591             BOOST_FOREACH(CNode* pnode, vNodes)
 592                 if (pnode != this)
 593                     pnode->PushMessage("subscribe", nChannel, nHops);
 594     }
 595
 596     vfSubscribe[nChannel] = true;
 597 }
 598
 599 void CNode::CancelSubscribe(unsigned int nChannel)
 600 {
 601     if (nChannel >= vfSubscribe.size())
 602         return;
 603
 604     // Prevent from relaying cancel if wasn't subscribed
 605     if (!vfSubscribe[nChannel])
 606         return;
 607     vfSubscribe[nChannel] = false;
 608
 609     if (!AnySubscribed(nChannel))
 610     {
 611         // Relay subscription cancel
 612         CRITICAL_BLOCK(cs_vNodes)
 613             BOOST_FOREACH(CNode* pnode, vNodes)
 614                 if (pnode != this)
 615                     pnode->PushMessage("sub-cancel", nChannel);
 616     }
 617 }
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627 CNode* FindNode(unsigned int ip)
 628 {
 629     CRITICAL_BLOCK(cs_vNodes)
 630     {
 631         BOOST_FOREACH(CNode* pnode, vNodes)
 632             if (pnode->addr.ip == ip)
 633                 return (pnode);
 634     }
 635     return NULL;
 636 }
 637
 638 CNode* FindNode(CAddress addr)
 639 {
 640     CRITICAL_BLOCK(cs_vNodes)
 641     {
 642         BOOST_FOREACH(CNode* pnode, vNodes)
 643             if (pnode->addr == addr)
 644                 return (pnode);
 645     }
 646     return NULL;
 647 }
 648
 649 CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
 650 {
 651     if (addrConnect.ip == addrLocalHost.ip)
 652         return NULL;
 653
 654     // Look for an existing connection
 655     CNode* pnode = FindNode(addrConnect.ip);
 656     if (pnode)
 657     {
 658         if (nTimeout != 0)
 659             pnode->AddRef(nTimeout);
 660         else
 661             pnode->AddRef();
 662         return pnode;
 663     }
 664
 665     /// debug print
 666     printf("trying connection %s lastseen=%.1fhrs lasttry=%.1fhrs\n",
 667         addrConnect.ToString().c_str(),
 668         (double)(addrConnect.nTime - GetAdjustedTime())/3600.0,
 669         (double)(addrConnect.nLastTry - GetAdjustedTime())/3600.0);
 670
 671     CRITICAL_BLOCK(cs_mapAddresses)
 672         mapAddresses[addrConnect.GetKey()].nLastTry = GetAdjustedTime();
 673
 674     // Connect
 675     SOCKET hSocket;
 676     if (ConnectSocket(addrConnect, hSocket))
 677     {
 678         /// debug print
 679         printf("connected %s\n", addrConnect.ToString().c_str());
 680
 681         // Set to nonblocking
 682 #ifdef __WXMSW__
 683         u_long nOne = 1;
 684         if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR)
 685             printf("ConnectSocket() : ioctlsocket nonblocking setting failed, error %d\n", WSAGetLastError());
 686 #else
 687         if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
 688             printf("ConnectSocket() : fcntl nonblocking setting failed, error %d\n", errno);
 689 #endif
 690
 691         // Add node
 692         CNode* pnode = new CNode(hSocket, addrConnect, false);
 693         if (nTimeout != 0)
 694             pnode->AddRef(nTimeout);
 695         else
 696             pnode->AddRef();
 697         CRITICAL_BLOCK(cs_vNodes)
 698             vNodes.push_back(pnode);
 699
 700         pnode->nTimeConnected = GetTime();
 701         return pnode;
 702     }
 703     else
 704     {
 705         return NULL;
 706     }
 707 }
 708
 709 void CNode::CloseSocketDisconnect()
 710 {
 711     fDisconnect = true;
 712     if (hSocket != INVALID_SOCKET)
 713     {
 714         if (fDebug)
 715             printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
 716         printf("disconnecting node %s\n", addr.ToString().c_str());
 717         closesocket(hSocket);
 718         hSocket = INVALID_SOCKET;
 719     }
 720 }
 721
 722 void CNode::Cleanup()
 723 {
 724     // All of a nodes broadcasts and subscriptions are automatically torn down
 725     // when it goes down, so a node has to stay up to keep its broadcast going.
 726
 727     // Cancel subscriptions
 728     for (unsigned int nChannel = 0; nChannel < vfSubscribe.size(); nChannel++)
 729         if (vfSubscribe[nChannel])
 730             CancelSubscribe(nChannel);
 731 }
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745 void ThreadSocketHandler(void* parg)
 746 {
 747     IMPLEMENT_RANDOMIZE_STACK(ThreadSocketHandler(parg));
 748     try
 749     {
 750         vnThreadsRunning[0]++;
 751         ThreadSocketHandler2(parg);
 752         vnThreadsRunning[0]--;
 753     }
 754     catch (std::exception& e) {
 755         vnThreadsRunning[0]--;
 756         PrintException(&e, "ThreadSocketHandler()");
 757     } catch (...) {
 758         vnThreadsRunning[0]--;
 759         throw; // support pthread_cancel()
 760     }
 761     printf("ThreadSocketHandler exiting\n");
 762 }
 763
 764 void ThreadSocketHandler2(void* parg)
 765 {
 766     printf("ThreadSocketHandler started\n");
 767     list<CNode*> vNodesDisconnected;
 768     int nPrevNodeCount = 0;
 769
 770     loop
 771     {
 772         //
 773         // Disconnect nodes
 774         //
 775         CRITICAL_BLOCK(cs_vNodes)
 776         {
 777             // Disconnect unused nodes
 778             vector<CNode*> vNodesCopy = vNodes;
 779             BOOST_FOREACH(CNode* pnode, vNodesCopy)
 780             {
 781                 if (pnode->fDisconnect ||
 782                     (pnode->GetRefCount() <= 0 && pnode->vRecv.empty() && pnode->vSend.empty()))
 783                 {
 784                     // remove from vNodes
 785                     vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
 786
 787                     // close socket and cleanup
 788                     pnode->CloseSocketDisconnect();
 789                     pnode->Cleanup();
 790
 791                     // hold in disconnected pool until all refs are released
 792                     pnode->nReleaseTime = max(pnode->nReleaseTime, GetTime() + 15 * 60);
 793                     if (pnode->fNetworkNode || pnode->fInbound)
 794                         pnode->Release();
 795                     vNodesDisconnected.push_back(pnode);
 796                 }
 797             }
 798
 799             // Delete disconnected nodes
 800             list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
 801             BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy)
 802             {
 803                 // wait until threads are done using it
 804                 if (pnode->GetRefCount() <= 0)
 805                 {
 806                     bool fDelete = false;
 807                     TRY_CRITICAL_BLOCK(pnode->cs_vSend)
 808                      TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
 809                       TRY_CRITICAL_BLOCK(pnode->cs_mapRequests)
 810                        TRY_CRITICAL_BLOCK(pnode->cs_inventory)
 811                         fDelete = true;
 812                     if (fDelete)
 813                     {
 814                         vNodesDisconnected.remove(pnode);
 815                         delete pnode;
 816                     }
 817                 }
 818             }
 819         }
 820         if (vNodes.size() != nPrevNodeCount)
 821         {
 822             nPrevNodeCount = vNodes.size();
 823             MainFrameRepaint();
 824         }
 825
 826
 827         //
 828         // Find which sockets have data to receive
 829         //
 830         struct timeval timeout;
 831         timeout.tv_sec  = 0;
 832         timeout.tv_usec = 50000; // frequency to poll pnode->vSend
 833
 834         fd_set fdsetRecv;
 835         fd_set fdsetSend;
 836         fd_set fdsetError;
 837         FD_ZERO(&fdsetRecv);
 838         FD_ZERO(&fdsetSend);
 839         FD_ZERO(&fdsetError);
 840         SOCKET hSocketMax = 0;
 841
 842         if(hListenSocket != INVALID_SOCKET)
 843             FD_SET(hListenSocket, &fdsetRecv);
 844         hSocketMax = max(hSocketMax, hListenSocket);
 845         CRITICAL_BLOCK(cs_vNodes)
 846         {
 847             BOOST_FOREACH(CNode* pnode, vNodes)
 848             {
 849                 if (pnode->hSocket == INVALID_SOCKET)
 850                     continue;
 851                 FD_SET(pnode->hSocket, &fdsetRecv);
 852                 FD_SET(pnode->hSocket, &fdsetError);
 853                 hSocketMax = max(hSocketMax, pnode->hSocket);
 854                 TRY_CRITICAL_BLOCK(pnode->cs_vSend)
 855                     if (!pnode->vSend.empty())
 856                         FD_SET(pnode->hSocket, &fdsetSend);
 857             }
 858         }
 859
 860         vnThreadsRunning[0]--;
 861         int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout);
 862         vnThreadsRunning[0]++;
 863         if (fShutdown)
 864             return;
 865         if (nSelect == SOCKET_ERROR)
 866         {
 867             int nErr = WSAGetLastError();
 868             if (hSocketMax > -1)
 869             {
 870                 printf("socket select error %d\n", nErr);
 871                 for (int i = 0; i <= hSocketMax; i++)
 872                     FD_SET(i, &fdsetRecv);
 873             }
 874             FD_ZERO(&fdsetSend);
 875             FD_ZERO(&fdsetError);
 876             Sleep(timeout.tv_usec/1000);
 877         }
 878
 879
 880         //
 881         // Accept new connections
 882         //
 883         if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
 884         {
 885             struct sockaddr_in sockaddr;
 886             socklen_t len = sizeof(sockaddr);
 887             SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
 888             CAddress addr(sockaddr);
 889             int nInbound = 0;
 890
 891             CRITICAL_BLOCK(cs_vNodes)
 892                 BOOST_FOREACH(CNode* pnode, vNodes)
 893                 if (pnode->fInbound)
 894                     nInbound++;
 895             if (hSocket == INVALID_SOCKET)
 896             {
 897                 if (WSAGetLastError() != WSAEWOULDBLOCK)
 898                     printf("socket error accept failed: %d\n", WSAGetLastError());
 899             }
 900             else if (nInbound >= GetArg("-maxconnections", 125) - MAX_OUTBOUND_CONNECTIONS)
 901             {
 902                 closesocket(hSocket);
 903             }
 904             else
 905             {
 906                 printf("accepted connection %s\n", addr.ToString().c_str());
 907                 CNode* pnode = new CNode(hSocket, addr, true);
 908                 pnode->AddRef();
 909                 CRITICAL_BLOCK(cs_vNodes)
 910                     vNodes.push_back(pnode);
 911             }
 912         }
 913
 914
 915         //
 916         // Service each socket
 917         //
 918         vector<CNode*> vNodesCopy;
 919         CRITICAL_BLOCK(cs_vNodes)
 920         {
 921             vNodesCopy = vNodes;
 922             BOOST_FOREACH(CNode* pnode, vNodesCopy)
 923                 pnode->AddRef();
 924         }
 925         BOOST_FOREACH(CNode* pnode, vNodesCopy)
 926         {
 927             if (fShutdown)
 928                 return;
 929
 930             //
 931             // Receive
 932             //
 933             if (pnode->hSocket == INVALID_SOCKET)
 934                 continue;
 935             if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
 936             {
 937                 TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
 938                 {
 939                     CDataStream& vRecv = pnode->vRecv;
 940                     unsigned int nPos = vRecv.size();
 941
 942                     if (nPos > ReceiveBufferSize()) {
 943                         if (!pnode->fDisconnect)
 944                             printf("socket recv flood control disconnect (%d bytes)\n", vRecv.size());
 945                         pnode->CloseSocketDisconnect();
 946                     }
 947                     else {
 948                         // typical socket buffer is 8K-64K
 949                         char pchBuf[0x10000];
 950                         int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
 951                         if (nBytes > 0)
 952                         {
 953                             vRecv.resize(nPos + nBytes);
 954                             memcpy(&vRecv[nPos], pchBuf, nBytes);
 955                             pnode->nLastRecv = GetTime();
 956                         }
 957                         else if (nBytes == 0)
 958                         {
 959                             // socket closed gracefully
 960                             if (!pnode->fDisconnect)
 961                                 printf("socket closed\n");
 962                             pnode->CloseSocketDisconnect();
 963                         }
 964                         else if (nBytes < 0)
 965                         {
 966                             // error
 967                             int nErr = WSAGetLastError();
 968                             if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
 969                             {
 970                                 if (!pnode->fDisconnect)
 971                                     printf("socket recv error %d\n", nErr);
 972                                 pnode->CloseSocketDisconnect();
 973                             }
 974                         }
 975                     }
 976                 }
 977             }
 978
 979             //
 980             // Send
 981             //
 982             if (pnode->hSocket == INVALID_SOCKET)
 983                 continue;
 984             if (FD_ISSET(pnode->hSocket, &fdsetSend))
 985             {
 986                 TRY_CRITICAL_BLOCK(pnode->cs_vSend)
 987                 {
 988                     CDataStream& vSend = pnode->vSend;
 989                     if (!vSend.empty())
 990                     {
 991                         int nBytes = send(pnode->hSocket, &vSend[0], vSend.size(), MSG_NOSIGNAL | MSG_DONTWAIT);
 992                         if (nBytes > 0)
 993                         {
 994                             vSend.erase(vSend.begin(), vSend.begin() + nBytes);
 995                             pnode->nLastSend = GetTime();
 996                         }
 997                         else if (nBytes < 0)
 998                         {
 999                             // error
1000                             int nErr = WSAGetLastError();
1001                             if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
1002                             {
1003                                 printf("socket send error %d\n", nErr);
1004                                 pnode->CloseSocketDisconnect();
1005                             }
1006                         }
1007                         if (vSend.size() > SendBufferSize()) {
1008                             if (!pnode->fDisconnect)
1009                                 printf("socket send flood control disconnect (%d bytes)\n", vSend.size());
1010                             pnode->CloseSocketDisconnect();
1011                         }
1012                     }
1013                 }
1014             }
1015
1016             //
1017             // Inactivity checking
1018             //
1019             if (pnode->vSend.empty())
1020                 pnode->nLastSendEmpty = GetTime();
1021             if (GetTime() - pnode->nTimeConnected > 60)
1022             {
1023                 if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
1024                 {
1025                     printf("socket no message in first 60 seconds, %d %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0);
1026                     pnode->fDisconnect = true;
1027                 }
1028                 else if (GetTime() - pnode->nLastSend > 90*60 && GetTime() - pnode->nLastSendEmpty > 90*60)
1029                 {
1030                     printf("socket not sending\n");
1031                     pnode->fDisconnect = true;
1032                 }
1033                 else if (GetTime() - pnode->nLastRecv > 90*60)
1034                 {
1035                     printf("socket inactivity timeout\n");
1036                     pnode->fDisconnect = true;
1037                 }
1038             }
1039         }
1040         CRITICAL_BLOCK(cs_vNodes)
1041         {
1042             BOOST_FOREACH(CNode* pnode, vNodesCopy)
1043                 pnode->Release();
1044         }
1045
1046         Sleep(10);
1047     }
1048 }
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058 #ifdef USE_UPNP
1059 void ThreadMapPort(void* parg)
1060 {
1061     IMPLEMENT_RANDOMIZE_STACK(ThreadMapPort(parg));
1062     try
1063     {
1064         vnThreadsRunning[5]++;
1065         ThreadMapPort2(parg);
1066         vnThreadsRunning[5]--;
1067     }
1068     catch (std::exception& e) {
1069         vnThreadsRunning[5]--;
1070         PrintException(&e, "ThreadMapPort()");
1071     } catch (...) {
1072         vnThreadsRunning[5]--;
1073         PrintException(NULL, "ThreadMapPort()");
1074     }
1075     printf("ThreadMapPort exiting\n");
1076 }
1077
1078 void ThreadMapPort2(void* parg)
1079 {
1080     printf("ThreadMapPort started\n");
1081
1082     char port[6];
1083     sprintf(port, "%d", GetListenPort());
1084
1085     const char * multicastif = 0;
1086     const char * minissdpdpath = 0;
1087     struct UPNPDev * devlist = 0;
1088     char lanaddr[64];
1089
1090 #ifndef UPNPDISCOVER_SUCCESS
1091     /* miniupnpc 1.5 */
1092     devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0);
1093 #else
1094     /* miniupnpc 1.6 */
1095     int error = 0;
1096     devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0, 0, &error);
1097 #endif
1098
1099     struct UPNPUrls urls;
1100     struct IGDdatas data;
1101     int r;
1102
1103     r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
1104     if (r == 1)
1105     {
1106         string strDesc = "Bitcoin " + FormatFullVersion();
1107 #ifndef UPNPDISCOVER_SUCCESS
1108     /* miniupnpc 1.5 */
1109         r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
1110                             port, port, lanaddr, strDesc.c_str(), "TCP", 0);
1111 #else
1112     /* miniupnpc 1.6 */
1113         r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
1114                             port, port, lanaddr, strDesc.c_str(), "TCP", 0, "0");
1115 #endif
1116
1117         if(r!=UPNPCOMMAND_SUCCESS)
1118             printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
1119                 port, port, lanaddr, r, strupnperror(r));
1120         else
1121             printf("UPnP Port Mapping successful.\n");
1122         loop {
1123             if (fShutdown || !fUseUPnP)
1124             {
1125                 r = UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype, port, "TCP", 0);
1126                 printf("UPNP_DeletePortMapping() returned : %d\n", r);
1127                 freeUPNPDevlist(devlist); devlist = 0;
1128                 FreeUPNPUrls(&urls);
1129                 return;
1130             }
1131             Sleep(2000);
1132         }
1133     } else {
1134         printf("No valid UPnP IGDs found\n");
1135         freeUPNPDevlist(devlist); devlist = 0;
1136         if (r != 0)
1137             FreeUPNPUrls(&urls);
1138         loop {
1139             if (fShutdown || !fUseUPnP)
1140                 return;
1141             Sleep(2000);
1142         }
1143     }
1144 }
1145
1146 void MapPort(bool fMapPort)
1147 {
1148     if (fUseUPnP != fMapPort)
1149     {
1150         fUseUPnP = fMapPort;
1151         WriteSetting("fUseUPnP", fUseUPnP);
1152     }
1153     if (fUseUPnP && vnThreadsRunning[5] < 1)
1154     {
1155         if (!CreateThread(ThreadMapPort, NULL))
1156             printf("Error: ThreadMapPort(ThreadMapPort) failed\n");
1157     }
1158 }
1159 #else
1160 void MapPort(bool /* unused fMapPort */)
1161 {
1162     // Intentionally left blank.
1163 }
1164 #endif
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175 static const char *strDNSSeed[] = {
1176     "bitseed.xf2.org",
1177     "dnsseed.bluematt.me",
1178     "seed.bitcoin.sipa.be",
1179     "dnsseed.bitcoin.dashjr.org",
1180 };
1181
1182 void ThreadDNSAddressSeed(void* parg)
1183 {
1184     IMPLEMENT_RANDOMIZE_STACK(ThreadDNSAddressSeed(parg));
1185     try
1186     {
1187         vnThreadsRunning[6]++;
1188         ThreadDNSAddressSeed2(parg);
1189         vnThreadsRunning[6]--;
1190     }
1191     catch (std::exception& e) {
1192         vnThreadsRunning[6]--;
1193         PrintException(&e, "ThreadDNSAddressSeed()");
1194     } catch (...) {
1195         vnThreadsRunning[6]--;
1196         throw; // support pthread_cancel()
1197     }
1198     printf("ThreadDNSAddressSeed exiting\n");
1199 }
1200
1201 void ThreadDNSAddressSeed2(void* parg)
1202 {
1203     printf("ThreadDNSAddressSeed started\n");
1204     int found = 0;
1205
1206     if (!fTestNet)
1207     {
1208         printf("Loading addresses from DNS seeds (could take a while)\n");
1209
1210         for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
1211             vector<CAddress> vaddr;
1212             if (Lookup(strDNSSeed[seed_idx], vaddr, NODE_NETWORK, -1, true))
1213             {
1214                 CAddrDB addrDB;
1215                 addrDB.TxnBegin();
1216                 BOOST_FOREACH (CAddress& addr, vaddr)
1217                 {
1218                     if (addr.GetByte(3) != 127)
1219                     {
1220                         addr.nTime = 0;
1221                         AddAddress(addr, 0, &addrDB);
1222                         found++;
1223                     }
1224                 }
1225                 addrDB.TxnCommit();  // Save addresses (it's ok if this fails)
1226             }
1227         }
1228     }
1229
1230     printf("%d addresses found from DNS seeds\n", found);
1231 }
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244 unsigned int pnSeed[] =
1245 {
1246     0x6884ac63, 0x3ffecead, 0x2919b953, 0x0942fe50, 0x7a1d922e, 0xcdd6734a, 0x953a5bb6, 0x2c46922e,
1247     0xe2a5f143, 0xaa39103a, 0xa06afa5c, 0x135ffd59, 0xe8e82863, 0xf61ef029, 0xf75f042e, 0x2b363532,
1248     0x29b2df42, 0x16b1f64e, 0xd46e281b, 0x5280bf58, 0x60372229, 0x1be58e4f, 0xa8496f45, 0x1fb1a057,
1249     0x756b3844, 0x3bb79445, 0x0b375518, 0xcccb0102, 0xb682bf2e, 0x46431c02, 0x3a81073a, 0xa3771f1f,
1250     0x213a121f, 0x85dc2c1b, 0x56b4323b, 0xb34e8945, 0x3c40b33d, 0xfa276418, 0x1f818d29, 0xebe1e344,
1251     0xf6160a18, 0xf4fa384a, 0x34b09558, 0xb882b543, 0xe3ce2253, 0x6abf56d8, 0xe91b1155, 0x688ee6ad,
1252     0x2efc6058, 0x4792cd47, 0x0c32f757, 0x4c813a46, 0x8c93644a, 0x37507444, 0x813ad218, 0xdac06d4a,
1253     0xe4c63e4b, 0x21a1ea3c, 0x8d88556f, 0x30e9173a, 0x041f681b, 0xdc77ba50, 0xc0072753, 0xceddd44f,
1254     0x052d1743, 0xe3c77a4a, 0x13981c3a, 0x5685d918, 0x3c0e4e70, 0x3e56fb54, 0xb676ae0c, 0xac93c859,
1255     0x22279f43, 0x975a4542, 0xe527f071, 0xea162f2e, 0x3c65a32e, 0x5be5713b, 0x961ec418, 0xb202922e,
1256     0x5ef7be50, 0xce49f53e, 0x05803b47, 0x8463b055, 0x78576153, 0x3ec2ae3a, 0x4bbd7118, 0xafcee043,
1257     0x56a3e8ba, 0x6174de4d, 0x8d01ba4b, 0xc9af564e, 0xdbc9c547, 0xa627474d, 0xdada9244, 0xd3b3083a,
1258     0x523e071f, 0xd6b96f18, 0xbd527c46, 0xdf2bbb4d, 0xd37b4a4b, 0x3a6a2158, 0xc064b055, 0x18a8e055,
1259     0xec4dae3b, 0x0540416c, 0x475b4fbe, 0x064803b2, 0x48e9f062, 0x2898524b, 0xd315ff43, 0xf786d247,
1260     0xc7ea2f3e, 0xc087f043, 0xc163354b, 0x8250284d, 0xed300029, 0xbf36e05c, 0x8eb3ae4c, 0xe7aa623e,
1261     0x7ced0274, 0xdd362c1b, 0x362b995a, 0xca26b629, 0x3fc41618, 0xb97b364e, 0xa05b8729, 0x0f5e3c43,
1262     0xdf942618, 0x6aeb9b5b, 0xbf04762e, 0xfaaeb118, 0x87579958, 0x76520044, 0xc2660c5b, 0x628b201b,
1263     0xf193932e, 0x1c0ad045, 0xff908346, 0x8da9d4da, 0xed201c1f, 0xa47a2b1b, 0x330007d4, 0x8ba1ed47,
1264     0xb2f02d44, 0x7db62c1b, 0x781c454b, 0xc0300029, 0xb7062a45, 0x88b52e3a, 0x78dd6b63, 0x1cb9b718,
1265     0x5d358e47, 0x59912c3b, 0x79607544, 0x5197f759, 0xc023be48, 0xd1013743, 0x0f354057, 0x8e3aac3b,
1266     0x4114693e, 0x22316318, 0xe27dda50, 0x878eac3b, 0x4948a21f, 0x5db7f24c, 0x8ccb6157, 0x26a5de18,
1267     0x0a11bd43, 0x27bb1e41, 0x60a7a951, 0x3e16b35e, 0x07888b53, 0x5648a853, 0x0149fe50, 0xd070a34f,
1268     0x6454c96d, 0xd6e54758, 0xa96dc152, 0x65447861, 0xf6bdf95e, 0x10400202, 0x2c29d483, 0x18174732,
1269     0x1d840618, 0x12e61818, 0x089d3f3c, 0x917e931f, 0xd1b0c90e, 0x25bd3c42, 0xeb05775b, 0x7d550c59,
1270     0x6cfacb01, 0xe4224444, 0xa41dd943, 0x0f5aa643, 0x5e33731b, 0x81036d50, 0x6f46a0d1, 0x7731be43,
1271     0x14840e18, 0xf1e8d059, 0x661d2b1f, 0x40a3201b, 0x9407b843, 0xedf0254d, 0x7bd1a5bc, 0x073dbe51,
1272     0xe864a97b, 0x2efd947b, 0xb9ca0e45, 0x4e2113ad, 0xcc305731, 0xd39ca63c, 0x733df918, 0xda172b1f,
1273     0xaa03b34d, 0x7230fd4d, 0xf1ce6e3a, 0x2e9fab43, 0xa4010750, 0xa928bd18, 0x6809be42, 0xb19de348,
1274     0xff956270, 0x0d795f51, 0xd2dec247, 0x6df5774b, 0xbac11f79, 0xdfb05c75, 0x887683d8, 0xa1e83632,
1275     0x2c0f7671, 0x28bcb65d, 0xac2a7545, 0x3eebfc60, 0x304ad7c4, 0xa215a462, 0xc86f0f58, 0xcfb92ebe,
1276     0x5e23ed82, 0xf506184b, 0xec0f19b7, 0x060c59ad, 0x86ee3174, 0x85380774, 0xa199a562, 0x02b507ae,
1277     0x33eb2163, 0xf2112b1f, 0xb702ba50, 0x131b9618, 0x90ccd04a, 0x08f3273b, 0xecb61718, 0x64b8b44d,
1278     0x182bf4dc, 0xc7b68286, 0x6e318d5f, 0xfdb03654, 0xb3272e54, 0xe014ad4b, 0x274e4a31, 0x7806375c,
1279     0xbc34a748, 0x1b5ad94a, 0x6b54d10e, 0x73e2ae6e, 0x5529d483, 0x8455a76d, 0x99c13f47, 0x1d811741,
1280     0xa9782a78, 0x0b00464d, 0x7266ea50, 0x532dab46, 0x33e1413e, 0x780d0c18, 0x0fb0854e, 0x03370155,
1281     0x2693042e, 0xfa3d824a, 0x2bb1681b, 0x37ea2a18, 0x7fb8414b, 0x32e0713b, 0xacf38d3f, 0xa282716f,
1282     0xb1a09d7b, 0xa04b764b, 0x83c94d18, 0x05ee4c6d, 0x0e795f51, 0x46984352, 0xf80fc247, 0x3fccb946,
1283     0xd7ae244b, 0x0a8e0a4c, 0x57b141bc, 0x3647bed1, 0x1431b052, 0x803a8bbb, 0xfc69056b, 0xf5991862,
1284     0x14963b2e, 0xd35d5dda, 0xc6c73574, 0xc8f1405b, 0x0ca4224d, 0xecd36071, 0xa9461754, 0xe7a0ed72,
1285     0x559e8346, 0x1c9beec1, 0xc786ea4a, 0x9561b44d, 0x9788074d, 0x1a69934f, 0x23c5614c, 0x07c79d4b,
1286     0xc7ee52db, 0xc72df351, 0xcb135e44, 0xa0988346, 0xc211fc4c, 0x87dec34b, 0x1381074d, 0x04a65cb7,
1287     0x4409083a, 0x4a407a4c, 0x92b8d37d, 0xacf50b4d, 0xa58aa5bc, 0x448f801f, 0x9c83762e, 0x6fd5734a,
1288     0xfe2d454b, 0x84144c55, 0x05190e4c, 0xb2151448, 0x63867a3e, 0x16099018, 0x9c010d3c, 0x962d8f3d,
1289     0xd51ee453, 0x9d86801f, 0x68e87b47, 0x6bf7bb73, 0x5fc7910e, 0x10d90118, 0x3db04442, 0x729d3e4b,
1290     0xc397d842, 0x57bb15ad, 0x72f31f4e, 0xc9380043, 0x2bb24e18, 0xd9b8ab50, 0xb786801f, 0xf4dc4847,
1291     0x85f4bb51, 0x4435995b, 0x5ba07e40, 0x2c57392e, 0x3628124b, 0x9839b64b, 0x6fe8b24d, 0xaddce847,
1292     0x75260e45, 0x0c572a43, 0xfea21902, 0xb9f9742e, 0x5a70d443, 0x8fc5910e, 0x868d4744, 0x56245e02,
1293     0xd7eb5f02, 0x35c12c1b, 0x4373034b, 0x8786554c, 0xa6facf18, 0x4b11a31f, 0x3570664e, 0x5a64bc42,
1294     0x0b03983f, 0x8f457e4c, 0x0fd874c3, 0xb6cf31b2, 0x2bbc2d4e, 0x146ca5b2, 0x9d00b150, 0x048a4153,
1295     0xca4dcd43, 0xc1607cca, 0x8234cf57, 0x9c7daead, 0x3dc07658, 0xea5c6e4c, 0xf1a0084e, 0x16d2ee53,
1296     0x1b849418, 0xfe913a47, 0x1e988f62, 0x208b644c, 0xc55ee980, 0xbdbce747, 0xf59a384e, 0x0f56091b,
1297     0x7417b745, 0x0c37344e, 0x2c62ab47, 0xf8533a4d, 0x8030084d, 0x76b93c4b, 0xda6ea0ad, 0x3c54f618,
1298     0x63b0de1f, 0x7370d858, 0x1a70bb4c, 0xdda63b2e, 0x60b2ba50, 0x1ba7d048, 0xbe1b2c1b, 0xabea5747,
1299     0x29ad2e4d, 0xe8cd7642, 0x66c80e18, 0x138bf34a, 0xc6145e44, 0x2586794c, 0x07bc5478, 0x0da0b14d,
1300     0x8f95354e, 0x9eb11c62, 0xa1545e46, 0x2e7a2602, 0x408c9c3d, 0x59065d55, 0xf51d1a4c, 0x3bbc6a4e,
1301     0xc71b2a2e, 0xcdaaa545, 0x17d659d0, 0x5202e7ad, 0xf1b68445, 0x93375961, 0xbd88a043, 0x066ad655,
1302     0x890f6318, 0x7b7dca47, 0x99bdd662, 0x3bb4fc53, 0x1231efdc, 0xc0a99444, 0x96bbea47, 0x61ed8748,
1303     0x27dfa73b, 0x8d4d1754, 0x3460042e, 0x551f0c4c, 0x8d0e0718, 0x162ddc53, 0x53231718, 0x1ecd65d0,
1304     0x944d28bc, 0x3b79d058, 0xaff97fbc, 0x4860006c, 0xc101c90e, 0xace41743, 0xa5975d4c, 0x5cc2703e,
1305     0xb55a4450, 0x02d18840, 0xee2765ae, 0xd6012fd5, 0x24c94d7d, 0x8c6eec47, 0x7520ba5d, 0x9e15e460,
1306     0x8510b04c, 0x75ec3847, 0x1dfa6661, 0xe172b3ad, 0x5744c90e, 0x52a0a152, 0x8d6fad18, 0x67b74b6d,
1307     0x93a089b2, 0x0f3ac5d5, 0xe5de1855, 0x43d25747, 0x4bad804a, 0x55b408d8, 0x60a36441, 0xf553e860,
1308     0xdb2fa2c8, 0x03152b32, 0xdd27a7d5, 0x3116a8b8, 0x0a1d708c, 0xeee2f13c, 0x6acf436f, 0xce6eb4ca,
1309     0x101cd3d9, 0x1c48a6b8, 0xe57d6f44, 0x93dcf562,
1310 };
1311
1312
1313
1314 void ThreadOpenConnections(void* parg)
1315 {
1316     IMPLEMENT_RANDOMIZE_STACK(ThreadOpenConnections(parg));
1317     try
1318     {
1319         vnThreadsRunning[1]++;
1320         ThreadOpenConnections2(parg);
1321         vnThreadsRunning[1]--;
1322     }
1323     catch (std::exception& e) {
1324         vnThreadsRunning[1]--;
1325         PrintException(&e, "ThreadOpenConnections()");
1326     } catch (...) {
1327         vnThreadsRunning[1]--;
1328         PrintException(NULL, "ThreadOpenConnections()");
1329     }
1330     printf("ThreadOpenConnections exiting\n");
1331 }
1332
1333 void ThreadOpenConnections2(void* parg)
1334 {
1335     printf("ThreadOpenConnections started\n");
1336
1337     // Connect to specific addresses
1338     if (mapArgs.count("-connect"))
1339     {
1340         for (int64 nLoop = 0;; nLoop++)
1341         {
1342             BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
1343             {
1344                 CAddress addr(strAddr, fAllowDNS);
1345                 if (addr.IsValid())
1346                     OpenNetworkConnection(addr);
1347                 for (int i = 0; i < 10 && i < nLoop; i++)
1348                 {
1349                     Sleep(500);
1350                     if (fShutdown)
1351                         return;
1352                 }
1353             }
1354         }
1355     }
1356
1357     // Connect to manually added nodes first
1358     if (mapArgs.count("-addnode"))
1359     {
1360         BOOST_FOREACH(string strAddr, mapMultiArgs["-addnode"])
1361         {
1362             CAddress addr(strAddr, fAllowDNS);
1363             if (addr.IsValid())
1364             {
1365                 OpenNetworkConnection(addr);
1366                 Sleep(500);
1367                 if (fShutdown)
1368                     return;
1369             }
1370         }
1371     }
1372
1373     // Initiate network connections
1374     int64 nStart = GetTime();
1375     loop
1376     {
1377         // Limit outbound connections
1378         vnThreadsRunning[1]--;
1379         Sleep(500);
1380         loop
1381         {
1382             int nOutbound = 0;
1383             CRITICAL_BLOCK(cs_vNodes)
1384                 BOOST_FOREACH(CNode* pnode, vNodes)
1385                     if (!pnode->fInbound)
1386                         nOutbound++;
1387             int nMaxOutboundConnections = MAX_OUTBOUND_CONNECTIONS;
1388             nMaxOutboundConnections = min(nMaxOutboundConnections, (int)GetArg("-maxconnections", 125));
1389             if (nOutbound < nMaxOutboundConnections)
1390                 break;
1391             Sleep(2000);
1392             if (fShutdown)
1393                 return;
1394         }
1395         vnThreadsRunning[1]++;
1396         if (fShutdown)
1397             return;
1398
1399         bool fAddSeeds = false;
1400
1401         CRITICAL_BLOCK(cs_mapAddresses)
1402         {
1403             // Add seed nodes if IRC isn't working
1404             bool fTOR = (fUseProxy && addrProxy.port == htons(9050));
1405             if (mapAddresses.empty() && (GetTime() - nStart > 60 || fUseProxy) && !fTestNet)
1406                 fAddSeeds = true;
1407         }
1408
1409         if (fAddSeeds)
1410         {
1411             for (int i = 0; i < ARRAYLEN(pnSeed); i++)
1412             {
1413                 // It'll only connect to one or two seed nodes because once it connects,
1414                 // it'll get a pile of addresses with newer timestamps.
1415                 // Seed nodes are given a random 'last seen time' of between one and two
1416                 // weeks ago.
1417                 const int64 nOneWeek = 7*24*60*60;
1418                 CAddress addr;
1419                 addr.ip = pnSeed[i];
1420                 addr.nTime = GetTime()-GetRand(nOneWeek)-nOneWeek;
1421                 AddAddress(addr);
1422             }
1423         }
1424
1425         //
1426         // Choose an address to connect to based on most recently seen
1427         //
1428         CAddress addrConnect;
1429         int64 nBest = INT64_MIN;
1430
1431         // Only connect to one address per a.b.?.? range.
1432         // Do this here so we don't have to critsect vNodes inside mapAddresses critsect.
1433         set<unsigned int> setConnected;
1434         CRITICAL_BLOCK(cs_vNodes)
1435             BOOST_FOREACH(CNode* pnode, vNodes)
1436                 setConnected.insert(pnode->addr.ip & 0x0000ffff);
1437
1438         CRITICAL_BLOCK(cs_mapAddresses)
1439         {
1440             BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
1441             {
1442                 const CAddress& addr = item.second;
1443                 if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.ip & 0x0000ffff))
1444                     continue;
1445                 int64 nSinceLastSeen = GetAdjustedTime() - addr.nTime;
1446                 int64 nSinceLastTry = GetAdjustedTime() - addr.nLastTry;
1447
1448                 // Randomize the order in a deterministic way, putting the standard port first
1449                 int64 nRandomizer = (uint64)(nStart * 4951 + addr.nLastTry * 9567851 + addr.ip * 7789) % (2 * 60 * 60);
1450                 if (addr.port != htons(GetDefaultPort()))
1451                     nRandomizer += 2 * 60 * 60;
1452
1453                 // Last seen  Base retry frequency
1454                 //   <1 hour   10 min
1455                 //    1 hour    1 hour
1456                 //    4 hours   2 hours
1457                 //   24 hours   5 hours
1458                 //   48 hours   7 hours
1459                 //    7 days   13 hours
1460                 //   30 days   27 hours
1461                 //   90 days   46 hours
1462                 //  365 days   93 hours
1463                 int64 nDelay = (int64)(3600.0 * sqrt(fabs((double)nSinceLastSeen) / 3600.0) + nRandomizer);
1464
1465                 // Fast reconnect for one hour after last seen
1466                 if (nSinceLastSeen < 60 * 60)
1467                     nDelay = 10 * 60;
1468
1469                 // Limit retry frequency
1470                 if (nSinceLastTry < nDelay)
1471                     continue;
1472
1473                 // If we have IRC, we'll be notified when they first come online,
1474                 // and again every 24 hours by the refresh broadcast.
1475                 if (nGotIRCAddresses > 0 && vNodes.size() >= 2 && nSinceLastSeen > 24 * 60 * 60)
1476                     continue;
1477
1478                 // Only try the old stuff if we don't have enough connections
1479                 if (vNodes.size() >= 8 && nSinceLastSeen > 24 * 60 * 60)
1480                     continue;
1481
1482                 // If multiple addresses are ready, prioritize by time since
1483                 // last seen and time since last tried.
1484                 int64 nScore = min(nSinceLastTry, (int64)24 * 60 * 60) - nSinceLastSeen - nRandomizer;
1485                 if (nScore > nBest)
1486                 {
1487                     nBest = nScore;
1488                     addrConnect = addr;
1489                 }
1490             }
1491         }
1492
1493         if (addrConnect.IsValid())
1494             OpenNetworkConnection(addrConnect);
1495     }
1496 }
1497
1498 bool OpenNetworkConnection(const CAddress& addrConnect)
1499 {
1500     //
1501     // Initiate outbound network connection
1502     //
1503     if (fShutdown)
1504         return false;
1505     if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() || FindNode(addrConnect.ip))
1506         return false;
1507
1508     vnThreadsRunning[1]--;
1509     CNode* pnode = ConnectNode(addrConnect);
1510     vnThreadsRunning[1]++;
1511     if (fShutdown)
1512         return false;
1513     if (!pnode)
1514         return false;
1515     pnode->fNetworkNode = true;
1516
1517     return true;
1518 }
1519
1520
1521
1522
1523
1524
1525
1526
1527 void ThreadMessageHandler(void* parg)
1528 {
1529     IMPLEMENT_RANDOMIZE_STACK(ThreadMessageHandler(parg));
1530     try
1531     {
1532         vnThreadsRunning[2]++;
1533         ThreadMessageHandler2(parg);
1534         vnThreadsRunning[2]--;
1535     }
1536     catch (std::exception& e) {
1537         vnThreadsRunning[2]--;
1538         PrintException(&e, "ThreadMessageHandler()");
1539     } catch (...) {
1540         vnThreadsRunning[2]--;
1541         PrintException(NULL, "ThreadMessageHandler()");
1542     }
1543     printf("ThreadMessageHandler exiting\n");
1544 }
1545
1546 void ThreadMessageHandler2(void* parg)
1547 {
1548     printf("ThreadMessageHandler started\n");
1549     SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
1550     while (!fShutdown)
1551     {
1552         vector<CNode*> vNodesCopy;
1553         CRITICAL_BLOCK(cs_vNodes)
1554         {
1555             vNodesCopy = vNodes;
1556             BOOST_FOREACH(CNode* pnode, vNodesCopy)
1557                 pnode->AddRef();
1558         }
1559
1560         // Poll the connected nodes for messages
1561         CNode* pnodeTrickle = NULL;
1562         if (!vNodesCopy.empty())
1563             pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
1564         BOOST_FOREACH(CNode* pnode, vNodesCopy)
1565         {
1566             // Receive messages
1567             TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
1568                 ProcessMessages(pnode);
1569             if (fShutdown)
1570                 return;
1571
1572             // Send messages
1573             TRY_CRITICAL_BLOCK(pnode->cs_vSend)
1574                 SendMessages(pnode, pnode == pnodeTrickle);
1575             if (fShutdown)
1576                 return;
1577         }
1578
1579         CRITICAL_BLOCK(cs_vNodes)
1580         {
1581             BOOST_FOREACH(CNode* pnode, vNodesCopy)
1582                 pnode->Release();
1583         }
1584
1585         // Wait and allow messages to bunch up.
1586         // Reduce vnThreadsRunning so StopNode has permission to exit while
1587         // we're sleeping, but we must always check fShutdown after doing this.
1588         vnThreadsRunning[2]--;
1589         Sleep(100);
1590         if (fRequestShutdown)
1591             Shutdown(NULL);
1592         vnThreadsRunning[2]++;
1593         if (fShutdown)
1594             return;
1595     }
1596 }
1597
1598
1599
1600
1601
1602
1603 bool BindListenPort(string& strError)
1604 {
1605     strError = "";
1606     int nOne = 1;
1607     addrLocalHost.port = htons(GetListenPort());
1608
1609 #ifdef __WXMSW__
1610     // Initialize Windows Sockets
1611     WSADATA wsadata;
1612     int ret = WSAStartup(MAKEWORD(2,2), &wsadata);
1613     if (ret != NO_ERROR)
1614     {
1615         strError = strprintf("Error: TCP/IP socket library failed to start (WSAStartup returned error %d)", ret);
1616         printf("%s\n", strError.c_str());
1617         return false;
1618     }
1619 #endif
1620
1621     // Create socket for listening for incoming connections
1622     hListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
1623     if (hListenSocket == INVALID_SOCKET)
1624     {
1625         strError = strprintf("Error: Couldn't open socket for incoming connections (socket returned error %d)", WSAGetLastError());
1626         printf("%s\n", strError.c_str());
1627         return false;
1628     }
1629
1630 #ifdef SO_NOSIGPIPE
1631     // Different way of disabling SIGPIPE on BSD
1632     setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
1633 #endif
1634
1635 #ifndef __WXMSW__
1636     // Allow binding if the port is still in TIME_WAIT state after
1637     // the program was closed and restarted.  Not an issue on windows.
1638     setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int));
1639 #endif
1640
1641 #ifdef __WXMSW__
1642     // Set to nonblocking, incoming connections will also inherit this
1643     if (ioctlsocket(hListenSocket, FIONBIO, (u_long*)&nOne) == SOCKET_ERROR)
1644 #else
1645     if (fcntl(hListenSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
1646 #endif
1647     {
1648         strError = strprintf("Error: Couldn't set properties on socket for incoming connections (error %d)", WSAGetLastError());
1649         printf("%s\n", strError.c_str());
1650         return false;
1651     }
1652
1653     // The sockaddr_in structure specifies the address family,
1654     // IP address, and port for the socket that is being bound
1655     struct sockaddr_in sockaddr;
1656     memset(&sockaddr, 0, sizeof(sockaddr));
1657     sockaddr.sin_family = AF_INET;
1658     sockaddr.sin_addr.s_addr = INADDR_ANY; // bind to all IPs on this computer
1659     sockaddr.sin_port = htons(GetListenPort());
1660     if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
1661     {
1662         int nErr = WSAGetLastError();
1663         if (nErr == WSAEADDRINUSE)
1664             strError = strprintf(_("Unable to bind to port %d on this computer.  Bitcoin is probably already running."), ntohs(sockaddr.sin_port));
1665         else
1666             strError = strprintf("Error: Unable to bind to port %d on this computer (bind returned error %d)", ntohs(sockaddr.sin_port), nErr);
1667         printf("%s\n", strError.c_str());
1668         return false;
1669     }
1670     printf("Bound to port %d\n", ntohs(sockaddr.sin_port));
1671
1672     // Listen for incoming connections
1673     if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR)
1674     {
1675         strError = strprintf("Error: Listening for incoming connections failed (listen returned error %d)", WSAGetLastError());
1676         printf("%s\n", strError.c_str());
1677         return false;
1678     }
1679
1680     return true;
1681 }
1682
1683 void StartNode(void* parg)
1684 {
1685     if (pnodeLocalHost == NULL)
1686         pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress("127.0.0.1", 0, false, nLocalServices));
1687
1688 #ifdef __WXMSW__
1689     // Get local host ip
1690     char pszHostName[1000] = "";
1691     if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR)
1692     {
1693         vector<CAddress> vaddr;
1694         if (Lookup(pszHostName, vaddr, nLocalServices, -1, true))
1695             BOOST_FOREACH (const CAddress &addr, vaddr)
1696                 if (addr.GetByte(3) != 127)
1697                 {
1698                     addrLocalHost = addr;
1699                     break;
1700                 }
1701     }
1702 #else
1703     // Get local host ip
1704     struct ifaddrs* myaddrs;
1705     if (getifaddrs(&myaddrs) == 0)
1706     {
1707         for (struct ifaddrs* ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next)
1708         {
1709             if (ifa->ifa_addr == NULL) continue;
1710             if ((ifa->ifa_flags & IFF_UP) == 0) continue;
1711             if (strcmp(ifa->ifa_name, "lo") == 0) continue;
1712             if (strcmp(ifa->ifa_name, "lo0") == 0) continue;
1713             char pszIP[100];
1714             if (ifa->ifa_addr->sa_family == AF_INET)
1715             {
1716                 struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr);
1717                 if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s4->sin_addr), pszIP, sizeof(pszIP)) != NULL)
1718                     printf("ipv4 %s: %s\n", ifa->ifa_name, pszIP);
1719
1720                 // Take the first IP that isn't loopback 127.x.x.x
1721                 CAddress addr(*(unsigned int*)&s4->sin_addr, GetListenPort(), nLocalServices);
1722                 if (addr.IsValid() && addr.GetByte(3) != 127)
1723                 {
1724                     addrLocalHost = addr;
1725                     break;
1726                 }
1727             }
1728             else if (ifa->ifa_addr->sa_family == AF_INET6)
1729             {
1730                 struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr);
1731                 if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s6->sin6_addr), pszIP, sizeof(pszIP)) != NULL)
1732                     printf("ipv6 %s: %s\n", ifa->ifa_name, pszIP);
1733             }
1734         }
1735         freeifaddrs(myaddrs);
1736     }
1737 #endif
1738     printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
1739
1740     if (fUseProxy || mapArgs.count("-connect") || fNoListen)
1741     {
1742         // Proxies can't take incoming connections
1743         addrLocalHost.ip = CAddress("0.0.0.0").ip;
1744         printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
1745     }
1746     else
1747     {
1748         CreateThread(ThreadGetMyExternalIP, NULL);
1749     }
1750
1751     //
1752     // Start threads
1753     //
1754
1755     if (GetBoolArg("-nodnsseed"))
1756         printf("DNS seeding disabled\n");
1757     else
1758         if (!CreateThread(ThreadDNSAddressSeed, NULL))
1759             printf("Error: CreateThread(ThreadDNSAddressSeed) failed\n");
1760
1761     // Map ports with UPnP
1762     if (fHaveUPnP)
1763         MapPort(fUseUPnP);
1764
1765     // Get addresses from IRC and advertise ours
1766     if (!CreateThread(ThreadIRCSeed, NULL))
1767         printf("Error: CreateThread(ThreadIRCSeed) failed\n");
1768
1769     // Send and receive from sockets, accept connections
1770     if (!CreateThread(ThreadSocketHandler, NULL))
1771         printf("Error: CreateThread(ThreadSocketHandler) failed\n");
1772
1773     // Initiate outbound connections
1774     if (!CreateThread(ThreadOpenConnections, NULL))
1775         printf("Error: CreateThread(ThreadOpenConnections) failed\n");
1776
1777     // Process messages
1778     if (!CreateThread(ThreadMessageHandler, NULL))
1779         printf("Error: CreateThread(ThreadMessageHandler) failed\n");
1780
1781     // Generate coins in the background
1782     GenerateBitcoins(fGenerateBitcoins, pwalletMain);
1783 }
1784
1785 bool StopNode()
1786 {
1787     printf("StopNode()\n");
1788     fShutdown = true;
1789     nTransactionsUpdated++;
1790     int64 nStart = GetTime();
1791     while (vnThreadsRunning[0] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0
1792 #ifdef USE_UPNP
1793         || vnThreadsRunning[5] > 0
1794 #endif
1795     )
1796     {
1797         if (GetTime() - nStart > 20)
1798             break;
1799         Sleep(20);
1800     }
1801     if (vnThreadsRunning[0] > 0) printf("ThreadSocketHandler still running\n");
1802     if (vnThreadsRunning[1] > 0) printf("ThreadOpenConnections still running\n");
1803     if (vnThreadsRunning[2] > 0) printf("ThreadMessageHandler still running\n");
1804     if (vnThreadsRunning[3] > 0) printf("ThreadBitcoinMiner still running\n");
1805     if (vnThreadsRunning[4] > 0) printf("ThreadRPCServer still running\n");
1806     if (fHaveUPnP && vnThreadsRunning[5] > 0) printf("ThreadMapPort still running\n");
1807     if (vnThreadsRunning[6] > 0) printf("ThreadDNSAddressSeed still running\n");
1808     while (vnThreadsRunning[2] > 0 || vnThreadsRunning[4] > 0)
1809         Sleep(20);
1810     Sleep(50);
1811
1812     return true;
1813 }
1814
1815 class CNetCleanup
1816 {
1817 public:
1818     CNetCleanup()
1819     {
1820     }
1821     ~CNetCleanup()
1822     {
1823         // Close sockets
1824         BOOST_FOREACH(CNode* pnode, vNodes)
1825             if (pnode->hSocket != INVALID_SOCKET)
1826                 closesocket(pnode->hSocket);
1827         if (hListenSocket != INVALID_SOCKET)
1828             if (closesocket(hListenSocket) == SOCKET_ERROR)
1829                 printf("closesocket(hListenSocket) failed with error %d\n", WSAGetLastError());
1830
1831 #ifdef __WXMSW__
1832         // Shutdown Windows Sockets
1833         WSACleanup();
1834 #endif
1835     }
1836 }
1837 instance_of_cnetcleanup;