raw
genesis                 1 // Copyright (c) 2009-2010 Satoshi Nakamoto
genesis                 2 // Copyright (c) 2009-2012 The Bitcoin developers
genesis                 3 // Distributed under the MIT/X11 software license, see the accompanying
genesis                 4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
genesis                 5 
genesis                 6 #include "headers.h"
genesis                 7 #include "irc.h"
genesis                 8 #include "db.h"
genesis                 9 #include "net.h"
genesis                10 #include "init.h"
genesis                11 #include "strlcpy.h"
genesis                12 
genesis                13 
genesis                14 using namespace std;
genesis                15 using namespace boost;
genesis                16 
genesis                17 static const int MAX_OUTBOUND_CONNECTIONS = 8;
genesis                18 
genesis                19 void ThreadMessageHandler2(void* parg);
genesis                20 void ThreadSocketHandler2(void* parg);
genesis                21 void ThreadOpenConnections2(void* parg);
genesis                22 bool OpenNetworkConnection(const CAddress& addrConnect);
genesis                23 
genesis                24 
genesis                25 
genesis                26 
genesis                27 
genesis                28 //
genesis                29 // Global state variables
genesis                30 //
genesis                31 bool fClient = false;
genesis                32 bool fAllowDNS = false;
genesis                33 uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
genesis                34 CAddress addrLocalHost("0.0.0.0", 0, false, nLocalServices);
genesis                35 static CNode* pnodeLocalHost = NULL;
genesis                36 uint64 nLocalHostNonce = 0;
genesis                37 array<int, 10> vnThreadsRunning;
genesis                38 static SOCKET hListenSocket = INVALID_SOCKET;
genesis                39 
genesis                40 vector<CNode*> vNodes;
genesis                41 CCriticalSection cs_vNodes;
genesis                42 map<vector<unsigned char>, CAddress> mapAddresses;
genesis                43 CCriticalSection cs_mapAddresses;
genesis                44 map<CInv, CDataStream> mapRelay;
genesis                45 deque<pair<int64, CInv> > vRelayExpiration;
genesis                46 CCriticalSection cs_mapRelay;
genesis                47 map<CInv, int64> mapAlreadyAskedFor;
genesis                48 
genesis                49 // Settings
genesis                50 int fUseProxy = false;
genesis                51 int nConnectTimeout = 5000;
genesis                52 CAddress addrProxy("127.0.0.1",9050);
genesis                53 
genesis                54 
genesis                55 
genesis                56 
genesis                57 unsigned short GetListenPort()
genesis                58 {
genesis                59     return (unsigned short)(GetArg("-port", GetDefaultPort()));
genesis                60 }
genesis                61 
genesis                62 void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd)
genesis                63 {
genesis                64     // Filter out duplicate requests
genesis                65     if (pindexBegin == pindexLastGetBlocksBegin && hashEnd == hashLastGetBlocksEnd)
genesis                66         return;
genesis                67     pindexLastGetBlocksBegin = pindexBegin;
genesis                68     hashLastGetBlocksEnd = hashEnd;
genesis                69 
genesis                70     PushMessage("getblocks", CBlockLocator(pindexBegin), hashEnd);
genesis                71 }
genesis                72 
genesis                73 
genesis                74 
genesis                75 
genesis                76 
genesis                77 bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout)
genesis                78 {
genesis                79     hSocketRet = INVALID_SOCKET;
genesis                80 
genesis                81     SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
genesis                82     if (hSocket == INVALID_SOCKET)
genesis                83         return false;
genesis                84 #ifdef SO_NOSIGPIPE
genesis                85     int set = 1;
genesis                86     setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
genesis                87 #endif
genesis                88 
genesis                89     bool fProxy = (fUseProxy && addrConnect.IsRoutable());
genesis                90     struct sockaddr_in sockaddr = (fProxy ? addrProxy.GetSockAddr() : addrConnect.GetSockAddr());
genesis                91 
genesis                92     int fFlags = fcntl(hSocket, F_GETFL, 0);
genesis                93     if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
bitcoin-asciilife...   94 
genesis                95     {
genesis                96         closesocket(hSocket);
genesis                97         return false;
genesis                98     }
genesis                99 
genesis               100 
genesis               101     if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
genesis               102     {
genesis               103         // WSAEINVAL is here because some legacy version of winsock uses it
genesis               104         if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
genesis               105         {
genesis               106             struct timeval timeout;
genesis               107             timeout.tv_sec  = nTimeout / 1000;
genesis               108             timeout.tv_usec = (nTimeout % 1000) * 1000;
genesis               109 
genesis               110             fd_set fdset;
genesis               111             FD_ZERO(&fdset);
genesis               112             FD_SET(hSocket, &fdset);
genesis               113             int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
genesis               114             if (nRet == 0)
genesis               115             {
genesis               116                 printf("connection timeout\n");
genesis               117                 closesocket(hSocket);
genesis               118                 return false;
genesis               119             }
genesis               120             if (nRet == SOCKET_ERROR)
genesis               121             {
genesis               122                 printf("select() for connection failed: %i\n",WSAGetLastError());
genesis               123                 closesocket(hSocket);
genesis               124                 return false;
genesis               125             }
genesis               126             socklen_t nRetSize = sizeof(nRet);
genesis               127             if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
genesis               128             {
genesis               129                 printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
genesis               130                 closesocket(hSocket);
genesis               131                 return false;
genesis               132             }
genesis               133             if (nRet != 0)
genesis               134             {
genesis               135                 printf("connect() failed after select(): %s\n",strerror(nRet));
genesis               136                 closesocket(hSocket);
genesis               137                 return false;
genesis               138             }
genesis               139         }
genesis               140         else
genesis               141         {
genesis               142             printf("connect() failed: %i\n",WSAGetLastError());
genesis               143             closesocket(hSocket);
genesis               144             return false;
genesis               145         }
genesis               146     }
genesis               147 
genesis               148     /*
genesis               149     this isn't even strictly necessary
genesis               150     CNode::ConnectNode immediately turns the socket back to non-blocking
genesis               151     but we'll turn it back to blocking just in case
genesis               152     */
genesis               153     fFlags = fcntl(hSocket, F_GETFL, 0);
genesis               154     if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
genesis               155     {
genesis               156         closesocket(hSocket);
genesis               157         return false;
genesis               158     }
genesis               159 
genesis               160     if (fProxy)
genesis               161     {
genesis               162         printf("proxy connecting %s\n", addrConnect.ToString().c_str());
genesis               163         char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
genesis               164         memcpy(pszSocks4IP + 2, &addrConnect.port, 2);
genesis               165         memcpy(pszSocks4IP + 4, &addrConnect.ip, 4);
genesis               166         char* pszSocks4 = pszSocks4IP;
genesis               167         int nSize = sizeof(pszSocks4IP);
genesis               168 
genesis               169         int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
genesis               170         if (ret != nSize)
genesis               171         {
genesis               172             closesocket(hSocket);
genesis               173             return error("Error sending to proxy");
genesis               174         }
genesis               175         char pchRet[8];
genesis               176         if (recv(hSocket, pchRet, 8, 0) != 8)
genesis               177         {
genesis               178             closesocket(hSocket);
genesis               179             return error("Error reading proxy response");
genesis               180         }
genesis               181         if (pchRet[1] != 0x5a)
genesis               182         {
genesis               183             closesocket(hSocket);
genesis               184             if (pchRet[1] != 0x5b)
genesis               185                 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
genesis               186             return false;
genesis               187         }
genesis               188         printf("proxy connected %s\n", addrConnect.ToString().c_str());
genesis               189     }
genesis               190 
genesis               191     hSocketRet = hSocket;
genesis               192     return true;
genesis               193 }
genesis               194 
genesis               195 // portDefault is in host order
genesis               196 bool Lookup(const char *pszName, vector<CAddress>& vaddr, int nServices, int nMaxSolutions, bool fAllowLookup, int portDefault, bool fAllowPort)
genesis               197 {
genesis               198     vaddr.clear();
genesis               199     if (pszName[0] == 0)
genesis               200         return false;
genesis               201     int port = portDefault;
genesis               202     char psz[256];
genesis               203     char *pszHost = psz;
genesis               204     strlcpy(psz, pszName, sizeof(psz));
genesis               205     if (fAllowPort)
genesis               206     {
genesis               207         char* pszColon = strrchr(psz+1,':');
genesis               208         char *pszPortEnd = NULL;
genesis               209         int portParsed = pszColon ? strtoul(pszColon+1, &pszPortEnd, 10) : 0;
genesis               210         if (pszColon && pszPortEnd && pszPortEnd[0] == 0)
genesis               211         {
genesis               212             if (psz[0] == '[' && pszColon[-1] == ']')
genesis               213             {
genesis               214                 // Future: enable IPv6 colon-notation inside []
genesis               215                 pszHost = psz+1;
genesis               216                 pszColon[-1] = 0;
genesis               217             }
genesis               218             else
genesis               219                 pszColon[0] = 0;
genesis               220             port = portParsed;
genesis               221             if (port < 0 || port > USHRT_MAX)
genesis               222                 port = USHRT_MAX;
genesis               223         }
genesis               224     }
genesis               225 
genesis               226     unsigned int addrIP = inet_addr(pszHost);
genesis               227     if (addrIP != INADDR_NONE)
genesis               228     {
genesis               229         // valid IP address passed
genesis               230         vaddr.push_back(CAddress(addrIP, port, nServices));
genesis               231         return true;
genesis               232     }
genesis               233 
genesis               234     if (!fAllowLookup)
genesis               235         return false;
genesis               236 
genesis               237     struct hostent* phostent = gethostbyname(pszHost);
genesis               238     if (!phostent)
genesis               239         return false;
genesis               240 
genesis               241     if (phostent->h_addrtype != AF_INET)
genesis               242         return false;
genesis               243 
genesis               244     char** ppAddr = phostent->h_addr_list;
genesis               245     while (*ppAddr != NULL && vaddr.size() != nMaxSolutions)
genesis               246     {
genesis               247         CAddress addr(((struct in_addr*)ppAddr[0])->s_addr, port, nServices);
genesis               248         if (addr.IsValid())
genesis               249             vaddr.push_back(addr);
genesis               250         ppAddr++;
genesis               251     }
genesis               252 
genesis               253     return (vaddr.size() > 0);
genesis               254 }
genesis               255 
genesis               256 // portDefault is in host order
genesis               257 bool Lookup(const char *pszName, CAddress& addr, int nServices, bool fAllowLookup, int portDefault, bool fAllowPort)
genesis               258 {
genesis               259     vector<CAddress> vaddr;
genesis               260     bool fRet = Lookup(pszName, vaddr, nServices, 1, fAllowLookup, portDefault, fAllowPort);
genesis               261     if (fRet)
genesis               262         addr = vaddr[0];
genesis               263     return fRet;
genesis               264 }
genesis               265 
genesis               266 
genesis               267 void ThreadGetMyExternalIP(void* parg)
genesis               268 {
genesis               269     // Wait for IRC to get it first
genesis               270     if (!GetBoolArg("-noirc"))
genesis               271     {
genesis               272         for (int i = 0; i < 2 * 60; i++)
genesis               273         {
genesis               274             Sleep(1000);
genesis               275             if (fGotExternalIP || fShutdown)
genesis               276                 return;
genesis               277         }
genesis               278     }
genesis               279 
genesis               280     // Fallback in case IRC fails to get it
asciilifeform_zap...  281     // ... nope.
genesis               282 }
genesis               283 
genesis               284 
genesis               285 bool AddAddress(CAddress addr, int64 nTimePenalty, CAddrDB *pAddrDB)
genesis               286 {
genesis               287     if (!addr.IsRoutable())
genesis               288         return false;
genesis               289     if (addr.ip == addrLocalHost.ip)
genesis               290         return false;
genesis               291     addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty);
genesis               292     bool fUpdated = false;
genesis               293     bool fNew = false;
genesis               294     CAddress addrFound = addr;
genesis               295 
genesis               296     CRITICAL_BLOCK(cs_mapAddresses)
genesis               297     {
genesis               298         map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
genesis               299         if (it == mapAddresses.end())
genesis               300         {
genesis               301             // New address
genesis               302             printf("AddAddress(%s)\n", addr.ToString().c_str());
genesis               303             mapAddresses.insert(make_pair(addr.GetKey(), addr));
genesis               304             fUpdated = true;
genesis               305             fNew = true;
genesis               306         }
genesis               307         else
genesis               308         {
genesis               309             addrFound = (*it).second;
genesis               310             if ((addrFound.nServices | addr.nServices) != addrFound.nServices)
genesis               311             {
genesis               312                 // Services have been added
genesis               313                 addrFound.nServices |= addr.nServices;
genesis               314                 fUpdated = true;
genesis               315             }
genesis               316             bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60);
genesis               317             int64 nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60);
genesis               318             if (addrFound.nTime < addr.nTime - nUpdateInterval)
genesis               319             {
genesis               320                 // Periodically update most recently seen time
genesis               321                 addrFound.nTime = addr.nTime;
genesis               322                 fUpdated = true;
genesis               323             }
genesis               324         }
genesis               325     }
genesis               326     // There is a nasty deadlock bug if this is done inside the cs_mapAddresses
genesis               327     // CRITICAL_BLOCK:
genesis               328     // Thread 1:  begin db transaction (locks inside-db-mutex)
genesis               329     //            then AddAddress (locks cs_mapAddresses)
genesis               330     // Thread 2:  AddAddress (locks cs_mapAddresses)
genesis               331     //             ... then db operation hangs waiting for inside-db-mutex
genesis               332     if (fUpdated)
genesis               333     {
genesis               334         if (pAddrDB)
genesis               335             pAddrDB->WriteAddress(addrFound);
genesis               336         else
genesis               337             CAddrDB().WriteAddress(addrFound);
genesis               338     }
genesis               339     return fNew;
genesis               340 }
genesis               341 
genesis               342 void AddressCurrentlyConnected(const CAddress& addr)
genesis               343 {
genesis               344     CAddress *paddrFound = NULL;
genesis               345 
genesis               346     CRITICAL_BLOCK(cs_mapAddresses)
genesis               347     {
genesis               348         // Only if it's been published already
genesis               349         map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
genesis               350         if (it != mapAddresses.end())
genesis               351             paddrFound = &(*it).second;
genesis               352     }
genesis               353 
genesis               354     if (paddrFound)
genesis               355     {
genesis               356         int64 nUpdateInterval = 20 * 60;
genesis               357         if (paddrFound->nTime < GetAdjustedTime() - nUpdateInterval)
genesis               358         {
genesis               359             // Periodically update most recently seen time
genesis               360             paddrFound->nTime = GetAdjustedTime();
genesis               361             CAddrDB addrdb;
genesis               362             addrdb.WriteAddress(*paddrFound);
genesis               363         }
genesis               364     }
genesis               365 }
genesis               366 
genesis               367 
genesis               368 
genesis               369 
genesis               370 
genesis               371 void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1)
genesis               372 {
genesis               373     // If the dialog might get closed before the reply comes back,
genesis               374     // call this in the destructor so it doesn't get called after it's deleted.
genesis               375     CRITICAL_BLOCK(cs_vNodes)
genesis               376     {
genesis               377         BOOST_FOREACH(CNode* pnode, vNodes)
genesis               378         {
genesis               379             CRITICAL_BLOCK(pnode->cs_mapRequests)
genesis               380             {
genesis               381                 for (map<uint256, CRequestTracker>::iterator mi = pnode->mapRequests.begin(); mi != pnode->mapRequests.end();)
genesis               382                 {
genesis               383                     CRequestTracker& tracker = (*mi).second;
genesis               384                     if (tracker.fn == fn && tracker.param1 == param1)
genesis               385                         pnode->mapRequests.erase(mi++);
genesis               386                     else
genesis               387                         mi++;
genesis               388                 }
genesis               389             }
genesis               390         }
genesis               391     }
genesis               392 }
genesis               393 
genesis               394 
genesis               395 
genesis               396 
genesis               397 
genesis               398 
genesis               399 
genesis               400 //
genesis               401 // Subscription methods for the broadcast and subscription system.
genesis               402 // Channel numbers are message numbers, i.e. MSG_TABLE and MSG_PRODUCT.
genesis               403 //
genesis               404 // The subscription system uses a meet-in-the-middle strategy.
genesis               405 // With 100,000 nodes, if senders broadcast to 1000 random nodes and receivers
genesis               406 // subscribe to 1000 random nodes, 99.995% (1 - 0.99^1000) of messages will get through.
genesis               407 //
genesis               408 
genesis               409 bool AnySubscribed(unsigned int nChannel)
genesis               410 {
genesis               411     if (pnodeLocalHost->IsSubscribed(nChannel))
genesis               412         return true;
genesis               413     CRITICAL_BLOCK(cs_vNodes)
genesis               414         BOOST_FOREACH(CNode* pnode, vNodes)
genesis               415             if (pnode->IsSubscribed(nChannel))
genesis               416                 return true;
genesis               417     return false;
genesis               418 }
genesis               419 
genesis               420 bool CNode::IsSubscribed(unsigned int nChannel)
genesis               421 {
genesis               422     if (nChannel >= vfSubscribe.size())
genesis               423         return false;
genesis               424     return vfSubscribe[nChannel];
genesis               425 }
genesis               426 
genesis               427 void CNode::Subscribe(unsigned int nChannel, unsigned int nHops)
genesis               428 {
genesis               429     if (nChannel >= vfSubscribe.size())
genesis               430         return;
genesis               431 
genesis               432     if (!AnySubscribed(nChannel))
genesis               433     {
genesis               434         // Relay subscribe
genesis               435         CRITICAL_BLOCK(cs_vNodes)
genesis               436             BOOST_FOREACH(CNode* pnode, vNodes)
genesis               437                 if (pnode != this)
genesis               438                     pnode->PushMessage("subscribe", nChannel, nHops);
genesis               439     }
genesis               440 
genesis               441     vfSubscribe[nChannel] = true;
genesis               442 }
genesis               443 
genesis               444 void CNode::CancelSubscribe(unsigned int nChannel)
genesis               445 {
genesis               446     if (nChannel >= vfSubscribe.size())
genesis               447         return;
genesis               448 
genesis               449     // Prevent from relaying cancel if wasn't subscribed
genesis               450     if (!vfSubscribe[nChannel])
genesis               451         return;
genesis               452     vfSubscribe[nChannel] = false;
genesis               453 
genesis               454     if (!AnySubscribed(nChannel))
genesis               455     {
genesis               456         // Relay subscription cancel
genesis               457         CRITICAL_BLOCK(cs_vNodes)
genesis               458             BOOST_FOREACH(CNode* pnode, vNodes)
genesis               459                 if (pnode != this)
genesis               460                     pnode->PushMessage("sub-cancel", nChannel);
genesis               461     }
genesis               462 }
genesis               463 
genesis               464 
genesis               465 
genesis               466 
genesis               467 
genesis               468 
genesis               469 
genesis               470 
genesis               471 
genesis               472 CNode* FindNode(unsigned int ip)
genesis               473 {
genesis               474     CRITICAL_BLOCK(cs_vNodes)
genesis               475     {
genesis               476         BOOST_FOREACH(CNode* pnode, vNodes)
genesis               477             if (pnode->addr.ip == ip)
genesis               478                 return (pnode);
genesis               479     }
genesis               480     return NULL;
genesis               481 }
genesis               482 
genesis               483 CNode* FindNode(CAddress addr)
genesis               484 {
genesis               485     CRITICAL_BLOCK(cs_vNodes)
genesis               486     {
genesis               487         BOOST_FOREACH(CNode* pnode, vNodes)
genesis               488             if (pnode->addr == addr)
genesis               489                 return (pnode);
genesis               490     }
genesis               491     return NULL;
genesis               492 }
genesis               493 
genesis               494 CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
genesis               495 {
genesis               496     if (addrConnect.ip == addrLocalHost.ip)
genesis               497         return NULL;
genesis               498 
genesis               499     // Look for an existing connection
genesis               500     CNode* pnode = FindNode(addrConnect.ip);
genesis               501     if (pnode)
genesis               502     {
genesis               503         if (nTimeout != 0)
genesis               504             pnode->AddRef(nTimeout);
genesis               505         else
genesis               506             pnode->AddRef();
genesis               507         return pnode;
genesis               508     }
genesis               509 
genesis               510     /// debug print
genesis               511     printf("trying connection %s lastseen=%.1fhrs lasttry=%.1fhrs\n",
genesis               512         addrConnect.ToString().c_str(),
genesis               513         (double)(addrConnect.nTime - GetAdjustedTime())/3600.0,
genesis               514         (double)(addrConnect.nLastTry - GetAdjustedTime())/3600.0);
genesis               515 
genesis               516     CRITICAL_BLOCK(cs_mapAddresses)
genesis               517         mapAddresses[addrConnect.GetKey()].nLastTry = GetAdjustedTime();
genesis               518 
genesis               519     // Connect
genesis               520     SOCKET hSocket;
genesis               521     if (ConnectSocket(addrConnect, hSocket))
genesis               522     {
genesis               523         /// debug print
genesis               524         printf("connected %s\n", addrConnect.ToString().c_str());
genesis               525 
genesis               526         // Set to nonblocking
genesis               527         if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
genesis               528             printf("ConnectSocket() : fcntl nonblocking setting failed, error %d\n", errno);
genesis               529 
genesis               530         // Add node
genesis               531         CNode* pnode = new CNode(hSocket, addrConnect, false);
genesis               532         if (nTimeout != 0)
genesis               533             pnode->AddRef(nTimeout);
genesis               534         else
genesis               535             pnode->AddRef();
genesis               536         CRITICAL_BLOCK(cs_vNodes)
genesis               537             vNodes.push_back(pnode);
genesis               538 
genesis               539         pnode->nTimeConnected = GetTime();
genesis               540         return pnode;
genesis               541     }
genesis               542     else
genesis               543     {
genesis               544         return NULL;
genesis               545     }
genesis               546 }
genesis               547 
genesis               548 void CNode::CloseSocketDisconnect()
genesis               549 {
genesis               550     fDisconnect = true;
genesis               551     if (hSocket != INVALID_SOCKET)
genesis               552     {
genesis               553         if (fDebug)
genesis               554             printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
genesis               555         printf("disconnecting node %s\n", addr.ToString().c_str());
genesis               556         closesocket(hSocket);
genesis               557         hSocket = INVALID_SOCKET;
genesis               558     }
genesis               559 }
genesis               560 
genesis               561 void CNode::Cleanup()
genesis               562 {
genesis               563     // All of a nodes broadcasts and subscriptions are automatically torn down
genesis               564     // when it goes down, so a node has to stay up to keep its broadcast going.
genesis               565 
genesis               566     // Cancel subscriptions
genesis               567     for (unsigned int nChannel = 0; nChannel < vfSubscribe.size(); nChannel++)
genesis               568         if (vfSubscribe[nChannel])
genesis               569             CancelSubscribe(nChannel);
genesis               570 }
genesis               571 
genesis               572 
genesis               573 std::map<unsigned int, int64> CNode::setBanned;
genesis               574 CCriticalSection CNode::cs_setBanned;
genesis               575 
genesis               576 void CNode::ClearBanned()
genesis               577 {
genesis               578     setBanned.clear();
genesis               579 }
genesis               580 
genesis               581 bool CNode::IsBanned(unsigned int ip)
genesis               582 {
genesis               583     bool fResult = false;
genesis               584     CRITICAL_BLOCK(cs_setBanned)
genesis               585     {
genesis               586         std::map<unsigned int, int64>::iterator i = setBanned.find(ip);
genesis               587         if (i != setBanned.end())
genesis               588         {
genesis               589             int64 t = (*i).second;
genesis               590             if (GetTime() < t)
genesis               591                 fResult = true;
genesis               592         }
genesis               593     }
genesis               594     return fResult;
genesis               595 }
genesis               596 
genesis               597 bool CNode::Misbehaving(int howmuch)
genesis               598 {
genesis               599     if (addr.IsLocal())
genesis               600     {
genesis               601         printf("Warning: local node %s misbehaving\n", addr.ToString().c_str());
genesis               602         return false;
genesis               603     }
genesis               604 
genesis               605     nMisbehavior += howmuch;
genesis               606     if (nMisbehavior >= GetArg("-banscore", 100))
genesis               607     {
genesis               608         int64 banTime = GetTime()+GetArg("-bantime", 60*60*24);  // Default 24-hour ban
genesis               609         CRITICAL_BLOCK(cs_setBanned)
genesis               610             if (setBanned[addr.ip] < banTime)
genesis               611                 setBanned[addr.ip] = banTime;
genesis               612         CloseSocketDisconnect();
genesis               613         printf("Disconnected %s for misbehavior (score=%d)\n", addr.ToString().c_str(), nMisbehavior);
genesis               614         return true;
genesis               615     }
genesis               616     return false;
genesis               617 }
genesis               618 
genesis               619 
genesis               620 
genesis               621 
genesis               622 
genesis               623 
genesis               624 
genesis               625 
genesis               626 
genesis               627 
genesis               628 
genesis               629 
genesis               630 void ThreadSocketHandler(void* parg)
genesis               631 {
genesis               632     IMPLEMENT_RANDOMIZE_STACK(ThreadSocketHandler(parg));
genesis               633     try
genesis               634     {
genesis               635         vnThreadsRunning[0]++;
genesis               636         ThreadSocketHandler2(parg);
genesis               637         vnThreadsRunning[0]--;
genesis               638     }
genesis               639     catch (std::exception& e) {
genesis               640         vnThreadsRunning[0]--;
genesis               641         PrintException(&e, "ThreadSocketHandler()");
genesis               642     } catch (...) {
genesis               643         vnThreadsRunning[0]--;
genesis               644         throw; // support pthread_cancel()
genesis               645     }
genesis               646     printf("ThreadSocketHandler exiting\n");
genesis               647 }
genesis               648 
genesis               649 void ThreadSocketHandler2(void* parg)
genesis               650 {
genesis               651     printf("ThreadSocketHandler started\n");
genesis               652     list<CNode*> vNodesDisconnected;
genesis               653     int nPrevNodeCount = 0;
genesis               654 
genesis               655     loop
genesis               656     {
genesis               657         //
genesis               658         // Disconnect nodes
genesis               659         //
genesis               660         CRITICAL_BLOCK(cs_vNodes)
genesis               661         {
genesis               662             // Disconnect unused nodes
genesis               663             vector<CNode*> vNodesCopy = vNodes;
genesis               664             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis               665             {
genesis               666                 if (pnode->fDisconnect ||
genesis               667                     (pnode->GetRefCount() <= 0 && pnode->vRecv.empty() && pnode->vSend.empty()))
genesis               668                 {
genesis               669                     // remove from vNodes
genesis               670                     vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
genesis               671 
genesis               672                     // close socket and cleanup
genesis               673                     pnode->CloseSocketDisconnect();
genesis               674                     pnode->Cleanup();
genesis               675 
genesis               676                     // hold in disconnected pool until all refs are released
genesis               677                     pnode->nReleaseTime = max(pnode->nReleaseTime, GetTime() + 15 * 60);
genesis               678                     if (pnode->fNetworkNode || pnode->fInbound)
genesis               679                         pnode->Release();
genesis               680                     vNodesDisconnected.push_back(pnode);
genesis               681                 }
genesis               682             }
genesis               683 
genesis               684             // Delete disconnected nodes
genesis               685             list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
genesis               686             BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy)
genesis               687             {
genesis               688                 // wait until threads are done using it
genesis               689                 if (pnode->GetRefCount() <= 0)
genesis               690                 {
genesis               691                     bool fDelete = false;
genesis               692                     TRY_CRITICAL_BLOCK(pnode->cs_vSend)
genesis               693                      TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
genesis               694                       TRY_CRITICAL_BLOCK(pnode->cs_mapRequests)
genesis               695                        TRY_CRITICAL_BLOCK(pnode->cs_inventory)
genesis               696                         fDelete = true;
genesis               697                     if (fDelete)
genesis               698                     {
genesis               699                         vNodesDisconnected.remove(pnode);
genesis               700                         delete pnode;
genesis               701                     }
genesis               702                 }
genesis               703             }
genesis               704         }
genesis               705         if (vNodes.size() != nPrevNodeCount)
genesis               706         {
genesis               707             nPrevNodeCount = vNodes.size();
genesis               708             MainFrameRepaint();
genesis               709         }
genesis               710 
genesis               711 
genesis               712         //
genesis               713         // Find which sockets have data to receive
genesis               714         //
genesis               715         struct timeval timeout;
genesis               716         timeout.tv_sec  = 0;
genesis               717         timeout.tv_usec = 50000; // frequency to poll pnode->vSend
genesis               718 
genesis               719         fd_set fdsetRecv;
genesis               720         fd_set fdsetSend;
genesis               721         fd_set fdsetError;
genesis               722         FD_ZERO(&fdsetRecv);
genesis               723         FD_ZERO(&fdsetSend);
genesis               724         FD_ZERO(&fdsetError);
genesis               725         SOCKET hSocketMax = 0;
genesis               726 
genesis               727         if(hListenSocket != INVALID_SOCKET)
genesis               728             FD_SET(hListenSocket, &fdsetRecv);
genesis               729         hSocketMax = max(hSocketMax, hListenSocket);
genesis               730         CRITICAL_BLOCK(cs_vNodes)
genesis               731         {
genesis               732             BOOST_FOREACH(CNode* pnode, vNodes)
genesis               733             {
genesis               734                 if (pnode->hSocket == INVALID_SOCKET)
genesis               735                     continue;
genesis               736                 FD_SET(pnode->hSocket, &fdsetRecv);
genesis               737                 FD_SET(pnode->hSocket, &fdsetError);
genesis               738                 hSocketMax = max(hSocketMax, pnode->hSocket);
genesis               739                 TRY_CRITICAL_BLOCK(pnode->cs_vSend)
genesis               740                     if (!pnode->vSend.empty())
genesis               741                         FD_SET(pnode->hSocket, &fdsetSend);
genesis               742             }
genesis               743         }
genesis               744 
genesis               745         vnThreadsRunning[0]--;
genesis               746         int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout);
genesis               747         vnThreadsRunning[0]++;
genesis               748         if (fShutdown)
genesis               749             return;
genesis               750         if (nSelect == SOCKET_ERROR)
genesis               751         {
genesis               752             int nErr = WSAGetLastError();
genesis               753             if (hSocketMax > -1)
genesis               754             {
genesis               755                 printf("socket select error %d\n", nErr);
genesis               756                 for (int i = 0; i <= hSocketMax; i++)
genesis               757                     FD_SET(i, &fdsetRecv);
genesis               758             }
genesis               759             FD_ZERO(&fdsetSend);
genesis               760             FD_ZERO(&fdsetError);
genesis               761             Sleep(timeout.tv_usec/1000);
genesis               762         }
genesis               763 
genesis               764 
genesis               765         //
genesis               766         // Accept new connections
genesis               767         //
genesis               768         if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
genesis               769         {
genesis               770             struct sockaddr_in sockaddr;
genesis               771             socklen_t len = sizeof(sockaddr);
genesis               772             SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
genesis               773             CAddress addr;
genesis               774             int nInbound = 0;
genesis               775 
genesis               776             if (hSocket != INVALID_SOCKET)
genesis               777                 addr = CAddress(sockaddr);
genesis               778 
genesis               779             CRITICAL_BLOCK(cs_vNodes)
genesis               780                 BOOST_FOREACH(CNode* pnode, vNodes)
genesis               781                 if (pnode->fInbound)
genesis               782                     nInbound++;
genesis               783 
genesis               784             if (hSocket == INVALID_SOCKET)
genesis               785             {
genesis               786                 if (WSAGetLastError() != WSAEWOULDBLOCK)
genesis               787                     printf("socket error accept failed: %d\n", WSAGetLastError());
genesis               788             }
genesis               789             else if (nInbound >= GetArg("-maxconnections", 125) - MAX_OUTBOUND_CONNECTIONS)
genesis               790             {
genesis               791                 closesocket(hSocket);
genesis               792             }
genesis               793             else if (CNode::IsBanned(addr.ip))
genesis               794             {
genesis               795                 printf("connection from %s dropped (banned)\n", addr.ToString().c_str());
genesis               796                 closesocket(hSocket);
genesis               797             }
genesis               798             else
genesis               799             {
genesis               800                 printf("accepted connection %s\n", addr.ToString().c_str());
genesis               801                 CNode* pnode = new CNode(hSocket, addr, true);
genesis               802                 pnode->AddRef();
genesis               803                 CRITICAL_BLOCK(cs_vNodes)
genesis               804                     vNodes.push_back(pnode);
genesis               805             }
genesis               806         }
genesis               807 
genesis               808 
genesis               809         //
genesis               810         // Service each socket
genesis               811         //
genesis               812         vector<CNode*> vNodesCopy;
genesis               813         CRITICAL_BLOCK(cs_vNodes)
genesis               814         {
genesis               815             vNodesCopy = vNodes;
genesis               816             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis               817                 pnode->AddRef();
genesis               818         }
genesis               819         BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis               820         {
genesis               821             if (fShutdown)
genesis               822                 return;
genesis               823 
genesis               824             //
genesis               825             // Receive
genesis               826             //
genesis               827             if (pnode->hSocket == INVALID_SOCKET)
genesis               828                 continue;
genesis               829             if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
genesis               830             {
genesis               831                 TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
genesis               832                 {
genesis               833                     CDataStream& vRecv = pnode->vRecv;
genesis               834                     unsigned int nPos = vRecv.size();
genesis               835 
genesis               836                     if (nPos > ReceiveBufferSize()) {
genesis               837                         if (!pnode->fDisconnect)
genesis               838                             printf("socket recv flood control disconnect (%d bytes)\n", vRecv.size());
genesis               839                         pnode->CloseSocketDisconnect();
genesis               840                     }
genesis               841                     else {
genesis               842                         // typical socket buffer is 8K-64K
genesis               843                         char pchBuf[0x10000];
genesis               844                         int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
genesis               845                         if (nBytes > 0)
genesis               846                         {
genesis               847                             vRecv.resize(nPos + nBytes);
genesis               848                             memcpy(&vRecv[nPos], pchBuf, nBytes);
genesis               849                             pnode->nLastRecv = GetTime();
genesis               850                         }
genesis               851                         else if (nBytes == 0)
genesis               852                         {
genesis               853                             // socket closed gracefully
genesis               854                             if (!pnode->fDisconnect)
genesis               855                                 printf("socket closed\n");
genesis               856                             pnode->CloseSocketDisconnect();
genesis               857                         }
genesis               858                         else if (nBytes < 0)
genesis               859                         {
genesis               860                             // error
genesis               861                             int nErr = WSAGetLastError();
genesis               862                             if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
genesis               863                             {
genesis               864                                 if (!pnode->fDisconnect)
genesis               865                                     printf("socket recv error %d\n", nErr);
genesis               866                                 pnode->CloseSocketDisconnect();
genesis               867                             }
genesis               868                         }
genesis               869                     }
genesis               870                 }
genesis               871             }
genesis               872 
genesis               873             //
genesis               874             // Send
genesis               875             //
genesis               876             if (pnode->hSocket == INVALID_SOCKET)
genesis               877                 continue;
genesis               878             if (FD_ISSET(pnode->hSocket, &fdsetSend))
genesis               879             {
genesis               880                 TRY_CRITICAL_BLOCK(pnode->cs_vSend)
genesis               881                 {
genesis               882                     CDataStream& vSend = pnode->vSend;
genesis               883                     if (!vSend.empty())
genesis               884                     {
genesis               885                         int nBytes = send(pnode->hSocket, &vSend[0], vSend.size(), MSG_NOSIGNAL | MSG_DONTWAIT);
genesis               886                         if (nBytes > 0)
genesis               887                         {
genesis               888                             vSend.erase(vSend.begin(), vSend.begin() + nBytes);
genesis               889                             pnode->nLastSend = GetTime();
genesis               890                         }
genesis               891                         else if (nBytes < 0)
genesis               892                         {
genesis               893                             // error
genesis               894                             int nErr = WSAGetLastError();
genesis               895                             if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
genesis               896                             {
genesis               897                                 printf("socket send error %d\n", nErr);
genesis               898                                 pnode->CloseSocketDisconnect();
genesis               899                             }
genesis               900                         }
genesis               901                         if (vSend.size() > SendBufferSize()) {
genesis               902                             if (!pnode->fDisconnect)
genesis               903                                 printf("socket send flood control disconnect (%d bytes)\n", vSend.size());
genesis               904                             pnode->CloseSocketDisconnect();
genesis               905                         }
genesis               906                     }
genesis               907                 }
genesis               908             }
genesis               909 
genesis               910             //
genesis               911             // Inactivity checking
genesis               912             //
genesis               913             if (pnode->vSend.empty())
genesis               914                 pnode->nLastSendEmpty = GetTime();
genesis               915             if (GetTime() - pnode->nTimeConnected > 60)
genesis               916             {
genesis               917                 if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
genesis               918                 {
genesis               919                     printf("socket no message in first 60 seconds, %d %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0);
genesis               920                     pnode->fDisconnect = true;
genesis               921                 }
genesis               922                 else if (GetTime() - pnode->nLastSend > 90*60 && GetTime() - pnode->nLastSendEmpty > 90*60)
genesis               923                 {
genesis               924                     printf("socket not sending\n");
genesis               925                     pnode->fDisconnect = true;
genesis               926                 }
genesis               927                 else if (GetTime() - pnode->nLastRecv > 90*60)
genesis               928                 {
genesis               929                     printf("socket inactivity timeout\n");
genesis               930                     pnode->fDisconnect = true;
genesis               931                 }
genesis               932             }
genesis               933         }
genesis               934         CRITICAL_BLOCK(cs_vNodes)
genesis               935         {
genesis               936             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis               937                 pnode->Release();
genesis               938         }
genesis               939 
genesis               940         Sleep(10);
genesis               941     }
genesis               942 }
genesis               943 
genesis               944 
genesis               945 void ThreadOpenConnections(void* parg)
genesis               946 {
genesis               947     IMPLEMENT_RANDOMIZE_STACK(ThreadOpenConnections(parg));
genesis               948     try
genesis               949     {
genesis               950         vnThreadsRunning[1]++;
genesis               951         ThreadOpenConnections2(parg);
genesis               952         vnThreadsRunning[1]--;
genesis               953     }
genesis               954     catch (std::exception& e) {
genesis               955         vnThreadsRunning[1]--;
genesis               956         PrintException(&e, "ThreadOpenConnections()");
genesis               957     } catch (...) {
genesis               958         vnThreadsRunning[1]--;
genesis               959         PrintException(NULL, "ThreadOpenConnections()");
genesis               960     }
genesis               961     printf("ThreadOpenConnections exiting\n");
genesis               962 }
genesis               963 
genesis               964 void ThreadOpenConnections2(void* parg)
genesis               965 {
genesis               966     printf("ThreadOpenConnections started\n");
genesis               967 
genesis               968     // Connect to specific addresses
genesis               969     if (mapArgs.count("-connect"))
genesis               970     {
genesis               971         for (int64 nLoop = 0;; nLoop++)
genesis               972         {
genesis               973             BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
genesis               974             {
genesis               975                 CAddress addr(strAddr, fAllowDNS);
genesis               976                 if (addr.IsValid())
genesis               977                     OpenNetworkConnection(addr);
genesis               978                 for (int i = 0; i < 10 && i < nLoop; i++)
genesis               979                 {
genesis               980                     Sleep(500);
genesis               981                     if (fShutdown)
genesis               982                         return;
genesis               983                 }
genesis               984             }
genesis               985         }
genesis               986     }
genesis               987 
genesis               988     // Connect to manually added nodes first
genesis               989     if (mapArgs.count("-addnode"))
genesis               990     {
genesis               991         BOOST_FOREACH(string strAddr, mapMultiArgs["-addnode"])
genesis               992         {
genesis               993             CAddress addr(strAddr, fAllowDNS);
genesis               994             if (addr.IsValid())
genesis               995             {
genesis               996                 OpenNetworkConnection(addr);
genesis               997                 Sleep(500);
genesis               998                 if (fShutdown)
genesis               999                     return;
genesis              1000             }
genesis              1001         }
genesis              1002     }
genesis              1003 
genesis              1004     // Initiate network connections
genesis              1005     int64 nStart = GetTime();
genesis              1006     loop
genesis              1007     {
genesis              1008         vnThreadsRunning[1]--;
genesis              1009         Sleep(500);
genesis              1010         vnThreadsRunning[1]++;
genesis              1011         if (fShutdown)
genesis              1012             return;
genesis              1013 
genesis              1014         // Limit outbound connections
genesis              1015         loop
genesis              1016         {
genesis              1017             int nOutbound = 0;
genesis              1018             CRITICAL_BLOCK(cs_vNodes)
genesis              1019                 BOOST_FOREACH(CNode* pnode, vNodes)
genesis              1020                     if (!pnode->fInbound)
genesis              1021                         nOutbound++;
genesis              1022             int nMaxOutboundConnections = MAX_OUTBOUND_CONNECTIONS;
genesis              1023             nMaxOutboundConnections = min(nMaxOutboundConnections, (int)GetArg("-maxconnections", 125));
genesis              1024             if (nOutbound < nMaxOutboundConnections)
genesis              1025                 break;
genesis              1026             vnThreadsRunning[1]--;
genesis              1027             Sleep(2000);
genesis              1028             vnThreadsRunning[1]++;
genesis              1029             if (fShutdown)
genesis              1030                 return;
genesis              1031         }
genesis              1032 
genesis              1033         //
genesis              1034         // Choose an address to connect to based on most recently seen
genesis              1035         //
genesis              1036         CAddress addrConnect;
genesis              1037         int64 nBest = INT64_MIN;
genesis              1038 
genesis              1039         // Only connect to one address per a.b.?.? range.
genesis              1040         // Do this here so we don't have to critsect vNodes inside mapAddresses critsect.
genesis              1041         set<unsigned int> setConnected;
genesis              1042         CRITICAL_BLOCK(cs_vNodes)
genesis              1043             BOOST_FOREACH(CNode* pnode, vNodes)
genesis              1044                 setConnected.insert(pnode->addr.ip & 0x0000ffff);
genesis              1045 
genesis              1046         int64 nANow = GetAdjustedTime();
genesis              1047 
genesis              1048         CRITICAL_BLOCK(cs_mapAddresses)
genesis              1049         {
genesis              1050             BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
genesis              1051             {
genesis              1052                 const CAddress& addr = item.second;
genesis              1053                 if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.ip & 0x0000ffff))
genesis              1054                     continue;
genesis              1055                 int64 nSinceLastSeen = nANow - addr.nTime;
genesis              1056                 int64 nSinceLastTry = nANow - addr.nLastTry;
genesis              1057 
genesis              1058                 // Randomize the order in a deterministic way, putting the standard port first
genesis              1059                 int64 nRandomizer = (uint64)(nStart * 4951 + addr.nLastTry * 9567851 + addr.ip * 7789) % (2 * 60 * 60);
genesis              1060                 if (addr.port != htons(GetDefaultPort()))
genesis              1061                     nRandomizer += 2 * 60 * 60;
genesis              1062 
genesis              1063                 // Last seen  Base retry frequency
genesis              1064                 //   <1 hour   10 min
genesis              1065                 //    1 hour    1 hour
genesis              1066                 //    4 hours   2 hours
genesis              1067                 //   24 hours   5 hours
genesis              1068                 //   48 hours   7 hours
genesis              1069                 //    7 days   13 hours
genesis              1070                 //   30 days   27 hours
genesis              1071                 //   90 days   46 hours
genesis              1072                 //  365 days   93 hours
genesis              1073                 int64 nDelay = (int64)(3600.0 * sqrt(fabs((double)nSinceLastSeen) / 3600.0) + nRandomizer);
genesis              1074 
genesis              1075                 // Fast reconnect for one hour after last seen
genesis              1076                 if (nSinceLastSeen < 60 * 60)
genesis              1077                     nDelay = 10 * 60;
genesis              1078 
genesis              1079                 // Limit retry frequency
genesis              1080                 if (nSinceLastTry < nDelay)
genesis              1081                     continue;
genesis              1082 
genesis              1083                 // If we have IRC, we'll be notified when they first come online,
genesis              1084                 // and again every 24 hours by the refresh broadcast.
genesis              1085                 if (nGotIRCAddresses > 0 && vNodes.size() >= 2 && nSinceLastSeen > 24 * 60 * 60)
genesis              1086                     continue;
genesis              1087 
genesis              1088                 // Only try the old stuff if we don't have enough connections
genesis              1089                 if (vNodes.size() >= 8 && nSinceLastSeen > 24 * 60 * 60)
genesis              1090                     continue;
genesis              1091 
genesis              1092                 // If multiple addresses are ready, prioritize by time since
genesis              1093                 // last seen and time since last tried.
genesis              1094                 int64 nScore = min(nSinceLastTry, (int64)24 * 60 * 60) - nSinceLastSeen - nRandomizer;
genesis              1095                 if (nScore > nBest)
genesis              1096                 {
genesis              1097                     nBest = nScore;
genesis              1098                     addrConnect = addr;
genesis              1099                 }
genesis              1100             }
genesis              1101         }
genesis              1102 
genesis              1103         if (addrConnect.IsValid())
genesis              1104             OpenNetworkConnection(addrConnect);
genesis              1105     }
genesis              1106 }
genesis              1107 
genesis              1108 bool OpenNetworkConnection(const CAddress& addrConnect)
genesis              1109 {
genesis              1110     //
genesis              1111     // Initiate outbound network connection
genesis              1112     //
genesis              1113     if (fShutdown)
genesis              1114         return false;
genesis              1115     if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() ||
genesis              1116         FindNode(addrConnect.ip) || CNode::IsBanned(addrConnect.ip))
genesis              1117         return false;
genesis              1118 
genesis              1119     vnThreadsRunning[1]--;
genesis              1120     CNode* pnode = ConnectNode(addrConnect);
genesis              1121     vnThreadsRunning[1]++;
genesis              1122     if (fShutdown)
genesis              1123         return false;
genesis              1124     if (!pnode)
genesis              1125         return false;
genesis              1126     pnode->fNetworkNode = true;
genesis              1127 
genesis              1128     return true;
genesis              1129 }
genesis              1130 
genesis              1131 
genesis              1132 
genesis              1133 
genesis              1134 
genesis              1135 
genesis              1136 
genesis              1137 
genesis              1138 void ThreadMessageHandler(void* parg)
genesis              1139 {
genesis              1140     IMPLEMENT_RANDOMIZE_STACK(ThreadMessageHandler(parg));
genesis              1141     try
genesis              1142     {
genesis              1143         vnThreadsRunning[2]++;
genesis              1144         ThreadMessageHandler2(parg);
genesis              1145         vnThreadsRunning[2]--;
genesis              1146     }
genesis              1147     catch (std::exception& e) {
genesis              1148         vnThreadsRunning[2]--;
genesis              1149         PrintException(&e, "ThreadMessageHandler()");
genesis              1150     } catch (...) {
genesis              1151         vnThreadsRunning[2]--;
genesis              1152         PrintException(NULL, "ThreadMessageHandler()");
genesis              1153     }
genesis              1154     printf("ThreadMessageHandler exiting\n");
genesis              1155 }
genesis              1156 
genesis              1157 void ThreadMessageHandler2(void* parg)
genesis              1158 {
genesis              1159     printf("ThreadMessageHandler started\n");
genesis              1160     SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
genesis              1161     while (!fShutdown)
genesis              1162     {
genesis              1163         vector<CNode*> vNodesCopy;
genesis              1164         CRITICAL_BLOCK(cs_vNodes)
genesis              1165         {
genesis              1166             vNodesCopy = vNodes;
genesis              1167             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis              1168                 pnode->AddRef();
genesis              1169         }
genesis              1170 
genesis              1171         // Poll the connected nodes for messages
genesis              1172         CNode* pnodeTrickle = NULL;
genesis              1173         if (!vNodesCopy.empty())
genesis              1174             pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
genesis              1175         BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis              1176         {
genesis              1177             // Receive messages
genesis              1178             TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
genesis              1179                 ProcessMessages(pnode);
genesis              1180             if (fShutdown)
genesis              1181                 return;
genesis              1182 
genesis              1183             // Send messages
genesis              1184             TRY_CRITICAL_BLOCK(pnode->cs_vSend)
genesis              1185                 SendMessages(pnode, pnode == pnodeTrickle);
genesis              1186             if (fShutdown)
genesis              1187                 return;
genesis              1188         }
genesis              1189 
genesis              1190         CRITICAL_BLOCK(cs_vNodes)
genesis              1191         {
genesis              1192             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis              1193                 pnode->Release();
genesis              1194         }
genesis              1195 
genesis              1196         // Wait and allow messages to bunch up.
genesis              1197         // Reduce vnThreadsRunning so StopNode has permission to exit while
genesis              1198         // we're sleeping, but we must always check fShutdown after doing this.
genesis              1199         vnThreadsRunning[2]--;
genesis              1200         Sleep(100);
genesis              1201         if (fRequestShutdown)
genesis              1202             Shutdown(NULL);
genesis              1203         vnThreadsRunning[2]++;
genesis              1204         if (fShutdown)
genesis              1205             return;
genesis              1206     }
genesis              1207 }
genesis              1208 
genesis              1209 
genesis              1210 
genesis              1211 
genesis              1212 
genesis              1213 
genesis              1214 bool BindListenPort(string& strError)
genesis              1215 {
genesis              1216     strError = "";
genesis              1217     int nOne = 1;
genesis              1218     addrLocalHost.port = htons(GetListenPort());
genesis              1219 
genesis              1220     // Create socket for listening for incoming connections
genesis              1221     hListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
genesis              1222     if (hListenSocket == INVALID_SOCKET)
genesis              1223     {
genesis              1224         strError = strprintf("Error: Couldn't open socket for incoming connections (socket returned error %d)", WSAGetLastError());
genesis              1225         printf("%s\n", strError.c_str());
genesis              1226         return false;
genesis              1227     }
genesis              1228 
genesis              1229 #ifdef SO_NOSIGPIPE
genesis              1230     // Different way of disabling SIGPIPE on BSD
genesis              1231     setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
genesis              1232 #endif
genesis              1233 
genesis              1234     // Allow binding if the port is still in TIME_WAIT state after
genesis              1235     // the program was closed and restarted.  Not an issue on windows.
genesis              1236     setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int));
genesis              1237 
genesis              1238     if (fcntl(hListenSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
genesis              1239     {
genesis              1240         strError = strprintf("Error: Couldn't set properties on socket for incoming connections (error %d)", WSAGetLastError());
genesis              1241         printf("%s\n", strError.c_str());
genesis              1242         return false;
genesis              1243     }
genesis              1244 
genesis              1245     // The sockaddr_in structure specifies the address family,
genesis              1246     // IP address, and port for the socket that is being bound
genesis              1247     struct sockaddr_in sockaddr;
genesis              1248     memset(&sockaddr, 0, sizeof(sockaddr));
genesis              1249     sockaddr.sin_family = AF_INET;
genesis              1250     sockaddr.sin_addr.s_addr = INADDR_ANY; // bind to all IPs on this computer
genesis              1251     sockaddr.sin_port = htons(GetListenPort());
genesis              1252     if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
genesis              1253     {
genesis              1254         int nErr = WSAGetLastError();
genesis              1255         if (nErr == WSAEADDRINUSE)
genesis              1256             strError = strprintf(_("Unable to bind to port %d on this computer.  Bitcoin is probably already running."), ntohs(sockaddr.sin_port));
genesis              1257         else
genesis              1258             strError = strprintf("Error: Unable to bind to port %d on this computer (bind returned error %d)", ntohs(sockaddr.sin_port), nErr);
genesis              1259         printf("%s\n", strError.c_str());
genesis              1260         return false;
genesis              1261     }
genesis              1262     printf("Bound to port %d\n", ntohs(sockaddr.sin_port));
genesis              1263 
genesis              1264     // Listen for incoming connections
genesis              1265     if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR)
genesis              1266     {
genesis              1267         strError = strprintf("Error: Listening for incoming connections failed (listen returned error %d)", WSAGetLastError());
genesis              1268         printf("%s\n", strError.c_str());
genesis              1269         return false;
genesis              1270     }
genesis              1271 
genesis              1272     return true;
genesis              1273 }
genesis              1274 
genesis              1275 void StartNode(void* parg)
genesis              1276 {
genesis              1277     if (pnodeLocalHost == NULL)
genesis              1278         pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress("127.0.0.1", 0, false, nLocalServices));
genesis              1279 
genesis              1280     // Get local host ip
genesis              1281     struct ifaddrs* myaddrs;
genesis              1282     if (getifaddrs(&myaddrs) == 0)
genesis              1283     {
genesis              1284         for (struct ifaddrs* ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next)
genesis              1285         {
genesis              1286             if (ifa->ifa_addr == NULL) continue;
genesis              1287             if ((ifa->ifa_flags & IFF_UP) == 0) continue;
genesis              1288             if (strcmp(ifa->ifa_name, "lo") == 0) continue;
genesis              1289             if (strcmp(ifa->ifa_name, "lo0") == 0) continue;
genesis              1290             char pszIP[100];
genesis              1291             if (ifa->ifa_addr->sa_family == AF_INET)
genesis              1292             {
genesis              1293                 struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr);
genesis              1294                 if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s4->sin_addr), pszIP, sizeof(pszIP)) != NULL)
genesis              1295                     printf("ipv4 %s: %s\n", ifa->ifa_name, pszIP);
genesis              1296 
genesis              1297                 // Take the first IP that isn't loopback 127.x.x.x
genesis              1298                 CAddress addr(*(unsigned int*)&s4->sin_addr, GetListenPort(), nLocalServices);
genesis              1299                 if (addr.IsValid() && addr.GetByte(3) != 127)
genesis              1300                 {
genesis              1301                     addrLocalHost = addr;
genesis              1302                     break;
genesis              1303                 }
genesis              1304             }
genesis              1305             else if (ifa->ifa_addr->sa_family == AF_INET6)
genesis              1306             {
genesis              1307                 struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr);
genesis              1308                 if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s6->sin6_addr), pszIP, sizeof(pszIP)) != NULL)
genesis              1309                     printf("ipv6 %s: %s\n", ifa->ifa_name, pszIP);
genesis              1310             }
genesis              1311         }
genesis              1312         freeifaddrs(myaddrs);
genesis              1313     }
bitcoin-asciilife... 1314 
genesis              1315     printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
genesis              1316 
genesis              1317     if (fUseProxy || mapArgs.count("-connect") || fNoListen)
genesis              1318     {
genesis              1319         // Proxies can't take incoming connections
genesis              1320         addrLocalHost.ip = CAddress("0.0.0.0").ip;
genesis              1321         printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
genesis              1322     }
genesis              1323     else
genesis              1324     {
genesis              1325         CreateThread(ThreadGetMyExternalIP, NULL);
genesis              1326     }
genesis              1327 
genesis              1328     //
genesis              1329     // Start threads
genesis              1330     //
genesis              1331 
genesis              1332     // Get addresses from IRC and advertise ours
genesis              1333     if (!CreateThread(ThreadIRCSeed, NULL))
genesis              1334         printf("Error: CreateThread(ThreadIRCSeed) failed\n");
genesis              1335 
genesis              1336     // Send and receive from sockets, accept connections
genesis              1337     if (!CreateThread(ThreadSocketHandler, NULL))
genesis              1338         printf("Error: CreateThread(ThreadSocketHandler) failed\n");
genesis              1339 
genesis              1340     // Initiate outbound connections
genesis              1341     if (!CreateThread(ThreadOpenConnections, NULL))
genesis              1342         printf("Error: CreateThread(ThreadOpenConnections) failed\n");
genesis              1343 
genesis              1344     // Process messages
genesis              1345     if (!CreateThread(ThreadMessageHandler, NULL))
genesis              1346         printf("Error: CreateThread(ThreadMessageHandler) failed\n");
genesis              1347 
genesis              1348     // Generate coins in the background
genesis              1349     GenerateBitcoins(fGenerateBitcoins, pwalletMain);
genesis              1350 }
genesis              1351 
genesis              1352 bool StopNode()
genesis              1353 {
genesis              1354     printf("StopNode()\n");
genesis              1355     fShutdown = true;
genesis              1356     nTransactionsUpdated++;
genesis              1357     int64 nStart = GetTime();
genesis              1358     while (vnThreadsRunning[0] > 0 || vnThreadsRunning[1] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0
genesis              1359     )
genesis              1360     {
genesis              1361         if (GetTime() - nStart > 20)
genesis              1362             break;
genesis              1363         Sleep(20);
genesis              1364     }
genesis              1365     if (vnThreadsRunning[0] > 0) printf("ThreadSocketHandler still running\n");
genesis              1366     if (vnThreadsRunning[1] > 0) printf("ThreadOpenConnections still running\n");
genesis              1367     if (vnThreadsRunning[2] > 0) printf("ThreadMessageHandler still running\n");
genesis              1368     if (vnThreadsRunning[3] > 0) printf("ThreadBitcoinMiner still running\n");
genesis              1369     if (vnThreadsRunning[4] > 0) printf("ThreadRPCServer still running\n");
genesis              1370     while (vnThreadsRunning[2] > 0 || vnThreadsRunning[4] > 0)
genesis              1371         Sleep(20);
genesis              1372     Sleep(50);
genesis              1373 
genesis              1374     return true;
genesis              1375 }
genesis              1376 
genesis              1377 class CNetCleanup
genesis              1378 {
genesis              1379 public:
genesis              1380     CNetCleanup()
genesis              1381     {
genesis              1382     }
genesis              1383     ~CNetCleanup()
genesis              1384     {
genesis              1385         // Close sockets
genesis              1386         BOOST_FOREACH(CNode* pnode, vNodes)
genesis              1387             if (pnode->hSocket != INVALID_SOCKET)
genesis              1388                 closesocket(pnode->hSocket);
genesis              1389         if (hListenSocket != INVALID_SOCKET)
genesis              1390             if (closesocket(hListenSocket) == SOCKET_ERROR)
genesis              1391                 printf("closesocket(hListenSocket) failed with error %d\n", WSAGetLastError());
genesis              1392 
genesis              1393     }
genesis              1394 }
genesis              1395 instance_of_cnetcleanup;