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