// Copyright (c) 2009-2010 Satoshi Nakamoto // Copyright (c) 2009-2012 The Bitcoin developers // Distributed under the MIT/X11 software license, see the accompanying // file license.txt or http://www.opensource.org/licenses/mit-license.php. #include "headers.h" #include "irc.h" #include "db.h" #include "net.h" #include "init.h" #include "strlcpy.h" #ifdef WIN32 #include #endif #ifdef USE_UPNP #include #include #include #include #endif using namespace std; using namespace boost; static const int MAX_OUTBOUND_CONNECTIONS = 8; void ThreadMessageHandler2(void* parg); void ThreadSocketHandler2(void* parg); void ThreadOpenConnections2(void* parg); #ifdef USE_UPNP void ThreadMapPort2(void* parg); #endif void ThreadDNSAddressSeed2(void* parg); bool OpenNetworkConnection(const CAddress& addrConnect); // // Global state variables // bool fClient = false; bool fAllowDNS = false; uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK); CAddress addrLocalHost("0.0.0.0", 0, false, nLocalServices); static CNode* pnodeLocalHost = NULL; uint64 nLocalHostNonce = 0; array vnThreadsRunning; static SOCKET hListenSocket = INVALID_SOCKET; vector vNodes; CCriticalSection cs_vNodes; map, CAddress> mapAddresses; CCriticalSection cs_mapAddresses; map mapRelay; deque > vRelayExpiration; CCriticalSection cs_mapRelay; map mapAlreadyAskedFor; // Settings int fUseProxy = false; int nConnectTimeout = 5000; CAddress addrProxy("127.0.0.1",9050); unsigned short GetListenPort() { return (unsigned short)(GetArg("-port", GetDefaultPort())); } void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd) { // Filter out duplicate requests if (pindexBegin == pindexLastGetBlocksBegin && hashEnd == hashLastGetBlocksEnd) return; pindexLastGetBlocksBegin = pindexBegin; hashLastGetBlocksEnd = hashEnd; PushMessage("getblocks", CBlockLocator(pindexBegin), hashEnd); } bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout) { hSocketRet = INVALID_SOCKET; SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (hSocket == INVALID_SOCKET) return false; #ifdef SO_NOSIGPIPE int set = 1; setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int)); #endif bool fProxy = (fUseProxy && addrConnect.IsRoutable()); struct sockaddr_in sockaddr = (fProxy ? addrProxy.GetSockAddr() : addrConnect.GetSockAddr()); #ifdef WIN32 u_long fNonblock = 1; if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR) #else int fFlags = fcntl(hSocket, F_GETFL, 0); if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1) #endif { closesocket(hSocket); return false; } if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR) { // WSAEINVAL is here because some legacy version of winsock uses it if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL) { struct timeval timeout; timeout.tv_sec = nTimeout / 1000; timeout.tv_usec = (nTimeout % 1000) * 1000; fd_set fdset; FD_ZERO(&fdset); FD_SET(hSocket, &fdset); int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout); if (nRet == 0) { printf("connection timeout\n"); closesocket(hSocket); return false; } if (nRet == SOCKET_ERROR) { printf("select() for connection failed: %i\n",WSAGetLastError()); closesocket(hSocket); return false; } socklen_t nRetSize = sizeof(nRet); #ifdef WIN32 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR) #else if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR) #endif { printf("getsockopt() for connection failed: %i\n",WSAGetLastError()); closesocket(hSocket); return false; } if (nRet != 0) { printf("connect() failed after select(): %s\n",strerror(nRet)); closesocket(hSocket); return false; } } #ifdef WIN32 else if (WSAGetLastError() != WSAEISCONN) #else else #endif { printf("connect() failed: %i\n",WSAGetLastError()); closesocket(hSocket); return false; } } /* this isn't even strictly necessary CNode::ConnectNode immediately turns the socket back to non-blocking but we'll turn it back to blocking just in case */ #ifdef WIN32 fNonblock = 0; if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR) #else fFlags = fcntl(hSocket, F_GETFL, 0); if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR) #endif { closesocket(hSocket); return false; } if (fProxy) { printf("proxy connecting %s\n", addrConnect.ToString().c_str()); char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user"; memcpy(pszSocks4IP + 2, &addrConnect.port, 2); memcpy(pszSocks4IP + 4, &addrConnect.ip, 4); char* pszSocks4 = pszSocks4IP; int nSize = sizeof(pszSocks4IP); int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL); if (ret != nSize) { closesocket(hSocket); return error("Error sending to proxy"); } char pchRet[8]; if (recv(hSocket, pchRet, 8, 0) != 8) { closesocket(hSocket); return error("Error reading proxy response"); } if (pchRet[1] != 0x5a) { closesocket(hSocket); if (pchRet[1] != 0x5b) printf("ERROR: Proxy returned error %d\n", pchRet[1]); return false; } printf("proxy connected %s\n", addrConnect.ToString().c_str()); } hSocketRet = hSocket; return true; } // portDefault is in host order bool Lookup(const char *pszName, vector& vaddr, int nServices, int nMaxSolutions, bool fAllowLookup, int portDefault, bool fAllowPort) { vaddr.clear(); if (pszName[0] == 0) return false; int port = portDefault; char psz[256]; char *pszHost = psz; strlcpy(psz, pszName, sizeof(psz)); if (fAllowPort) { char* pszColon = strrchr(psz+1,':'); char *pszPortEnd = NULL; int portParsed = pszColon ? strtoul(pszColon+1, &pszPortEnd, 10) : 0; if (pszColon && pszPortEnd && pszPortEnd[0] == 0) { if (psz[0] == '[' && pszColon[-1] == ']') { // Future: enable IPv6 colon-notation inside [] pszHost = psz+1; pszColon[-1] = 0; } else pszColon[0] = 0; port = portParsed; if (port < 0 || port > USHRT_MAX) port = USHRT_MAX; } } unsigned int addrIP = inet_addr(pszHost); if (addrIP != INADDR_NONE) { // valid IP address passed vaddr.push_back(CAddress(addrIP, port, nServices)); return true; } if (!fAllowLookup) return false; struct hostent* phostent = gethostbyname(pszHost); if (!phostent) return false; if (phostent->h_addrtype != AF_INET) return false; char** ppAddr = phostent->h_addr_list; while (*ppAddr != NULL && vaddr.size() != nMaxSolutions) { CAddress addr(((struct in_addr*)ppAddr[0])->s_addr, port, nServices); if (addr.IsValid()) vaddr.push_back(addr); ppAddr++; } return (vaddr.size() > 0); } // portDefault is in host order bool Lookup(const char *pszName, CAddress& addr, int nServices, bool fAllowLookup, int portDefault, bool fAllowPort) { vector vaddr; bool fRet = Lookup(pszName, vaddr, nServices, 1, fAllowLookup, portDefault, fAllowPort); if (fRet) addr = vaddr[0]; return fRet; } bool GetMyExternalIP2(const CAddress& addrConnect, const char* pszGet, const char* pszKeyword, unsigned int& ipRet) { SOCKET hSocket; if (!ConnectSocket(addrConnect, hSocket)) return error("GetMyExternalIP() : connection to %s failed", addrConnect.ToString().c_str()); send(hSocket, pszGet, strlen(pszGet), MSG_NOSIGNAL); string strLine; while (RecvLine(hSocket, strLine)) { if (strLine.empty()) // HTTP response is separated from headers by blank line { loop { if (!RecvLine(hSocket, strLine)) { closesocket(hSocket); return false; } if (pszKeyword == NULL) break; if (strLine.find(pszKeyword) != -1) { strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword)); break; } } closesocket(hSocket); if (strLine.find("<") != -1) strLine = strLine.substr(0, strLine.find("<")); strLine = strLine.substr(strspn(strLine.c_str(), " \t\n\r")); while (strLine.size() > 0 && isspace(strLine[strLine.size()-1])) strLine.resize(strLine.size()-1); CAddress addr(strLine,0,true); printf("GetMyExternalIP() received [%s] %s\n", strLine.c_str(), addr.ToString().c_str()); if (addr.ip == 0 || addr.ip == INADDR_NONE || !addr.IsRoutable()) return false; ipRet = addr.ip; return true; } } closesocket(hSocket); return error("GetMyExternalIP() : connection closed"); } // We now get our external IP from the IRC server first and only use this as a backup bool GetMyExternalIP(unsigned int& ipRet) { CAddress addrConnect; const char* pszGet; const char* pszKeyword; if (fUseProxy) return false; for (int nLookup = 0; nLookup <= 1; nLookup++) for (int nHost = 1; nHost <= 2; nHost++) { // We should be phasing out our use of sites like these. If we need // replacements, we should ask for volunteers to put this simple // php file on their webserver that prints the client IP: // if (nHost == 1) { addrConnect = CAddress("91.198.22.70",80); // checkip.dyndns.org if (nLookup == 1) { CAddress addrIP("checkip.dyndns.org", 80, true); if (addrIP.IsValid()) addrConnect = addrIP; } pszGet = "GET / HTTP/1.1\r\n" "Host: checkip.dyndns.org\r\n" "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n" "Connection: close\r\n" "\r\n"; pszKeyword = "Address:"; } else if (nHost == 2) { addrConnect = CAddress("74.208.43.192", 80); // www.showmyip.com if (nLookup == 1) { CAddress addrIP("www.showmyip.com", 80, true); if (addrIP.IsValid()) addrConnect = addrIP; } pszGet = "GET /simple/ HTTP/1.1\r\n" "Host: www.showmyip.com\r\n" "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n" "Connection: close\r\n" "\r\n"; pszKeyword = NULL; // Returns just IP address } if (GetMyExternalIP2(addrConnect, pszGet, pszKeyword, ipRet)) return true; } return false; } void ThreadGetMyExternalIP(void* parg) { // Wait for IRC to get it first if (!GetBoolArg("-noirc")) { for (int i = 0; i < 2 * 60; i++) { Sleep(1000); if (fGotExternalIP || fShutdown) return; } } // Fallback in case IRC fails to get it if (GetMyExternalIP(addrLocalHost.ip)) { printf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP().c_str()); if (addrLocalHost.IsRoutable()) { // If we already connected to a few before we had our IP, go back and addr them. // setAddrKnown automatically filters any duplicate sends. CAddress addr(addrLocalHost); addr.nTime = GetAdjustedTime(); CRITICAL_BLOCK(cs_vNodes) BOOST_FOREACH(CNode* pnode, vNodes) pnode->PushAddress(addr); } } } bool AddAddress(CAddress addr, int64 nTimePenalty, CAddrDB *pAddrDB) { if (!addr.IsRoutable()) return false; if (addr.ip == addrLocalHost.ip) return false; addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty); bool fUpdated = false; bool fNew = false; CAddress addrFound = addr; CRITICAL_BLOCK(cs_mapAddresses) { map, CAddress>::iterator it = mapAddresses.find(addr.GetKey()); if (it == mapAddresses.end()) { // New address printf("AddAddress(%s)\n", addr.ToString().c_str()); mapAddresses.insert(make_pair(addr.GetKey(), addr)); fUpdated = true; fNew = true; } else { addrFound = (*it).second; if ((addrFound.nServices | addr.nServices) != addrFound.nServices) { // Services have been added addrFound.nServices |= addr.nServices; fUpdated = true; } bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60); int64 nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60); if (addrFound.nTime < addr.nTime - nUpdateInterval) { // Periodically update most recently seen time addrFound.nTime = addr.nTime; fUpdated = true; } } } // There is a nasty deadlock bug if this is done inside the cs_mapAddresses // CRITICAL_BLOCK: // Thread 1: begin db transaction (locks inside-db-mutex) // then AddAddress (locks cs_mapAddresses) // Thread 2: AddAddress (locks cs_mapAddresses) // ... then db operation hangs waiting for inside-db-mutex if (fUpdated) { if (pAddrDB) pAddrDB->WriteAddress(addrFound); else CAddrDB().WriteAddress(addrFound); } return fNew; } void AddressCurrentlyConnected(const CAddress& addr) { CAddress *paddrFound = NULL; CRITICAL_BLOCK(cs_mapAddresses) { // Only if it's been published already map, CAddress>::iterator it = mapAddresses.find(addr.GetKey()); if (it != mapAddresses.end()) paddrFound = &(*it).second; } if (paddrFound) { int64 nUpdateInterval = 20 * 60; if (paddrFound->nTime < GetAdjustedTime() - nUpdateInterval) { // Periodically update most recently seen time paddrFound->nTime = GetAdjustedTime(); CAddrDB addrdb; addrdb.WriteAddress(*paddrFound); } } } void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1) { // If the dialog might get closed before the reply comes back, // call this in the destructor so it doesn't get called after it's deleted. CRITICAL_BLOCK(cs_vNodes) { BOOST_FOREACH(CNode* pnode, vNodes) { CRITICAL_BLOCK(pnode->cs_mapRequests) { for (map::iterator mi = pnode->mapRequests.begin(); mi != pnode->mapRequests.end();) { CRequestTracker& tracker = (*mi).second; if (tracker.fn == fn && tracker.param1 == param1) pnode->mapRequests.erase(mi++); else mi++; } } } } } // // Subscription methods for the broadcast and subscription system. // Channel numbers are message numbers, i.e. MSG_TABLE and MSG_PRODUCT. // // The subscription system uses a meet-in-the-middle strategy. // With 100,000 nodes, if senders broadcast to 1000 random nodes and receivers // subscribe to 1000 random nodes, 99.995% (1 - 0.99^1000) of messages will get through. // bool AnySubscribed(unsigned int nChannel) { if (pnodeLocalHost->IsSubscribed(nChannel)) return true; CRITICAL_BLOCK(cs_vNodes) BOOST_FOREACH(CNode* pnode, vNodes) if (pnode->IsSubscribed(nChannel)) return true; return false; } bool CNode::IsSubscribed(unsigned int nChannel) { if (nChannel >= vfSubscribe.size()) return false; return vfSubscribe[nChannel]; } void CNode::Subscribe(unsigned int nChannel, unsigned int nHops) { if (nChannel >= vfSubscribe.size()) return; if (!AnySubscribed(nChannel)) { // Relay subscribe CRITICAL_BLOCK(cs_vNodes) BOOST_FOREACH(CNode* pnode, vNodes) if (pnode != this) pnode->PushMessage("subscribe", nChannel, nHops); } vfSubscribe[nChannel] = true; } void CNode::CancelSubscribe(unsigned int nChannel) { if (nChannel >= vfSubscribe.size()) return; // Prevent from relaying cancel if wasn't subscribed if (!vfSubscribe[nChannel]) return; vfSubscribe[nChannel] = false; if (!AnySubscribed(nChannel)) { // Relay subscription cancel CRITICAL_BLOCK(cs_vNodes) BOOST_FOREACH(CNode* pnode, vNodes) if (pnode != this) pnode->PushMessage("sub-cancel", nChannel); } } CNode* FindNode(unsigned int ip) { CRITICAL_BLOCK(cs_vNodes) { BOOST_FOREACH(CNode* pnode, vNodes) if (pnode->addr.ip == ip) return (pnode); } return NULL; } CNode* FindNode(CAddress addr) { CRITICAL_BLOCK(cs_vNodes) { BOOST_FOREACH(CNode* pnode, vNodes) if (pnode->addr == addr) return (pnode); } return NULL; } CNode* ConnectNode(CAddress addrConnect, int64 nTimeout) { if (addrConnect.ip == addrLocalHost.ip) return NULL; // Look for an existing connection CNode* pnode = FindNode(addrConnect.ip); if (pnode) { if (nTimeout != 0) pnode->AddRef(nTimeout); else pnode->AddRef(); return pnode; } /// debug print printf("trying connection %s lastseen=%.1fhrs lasttry=%.1fhrs\n", addrConnect.ToString().c_str(), (double)(addrConnect.nTime - GetAdjustedTime())/3600.0, (double)(addrConnect.nLastTry - GetAdjustedTime())/3600.0); CRITICAL_BLOCK(cs_mapAddresses) mapAddresses[addrConnect.GetKey()].nLastTry = GetAdjustedTime(); // Connect SOCKET hSocket; if (ConnectSocket(addrConnect, hSocket)) { /// debug print printf("connected %s\n", addrConnect.ToString().c_str()); // Set to nonblocking #ifdef WIN32 u_long nOne = 1; if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR) printf("ConnectSocket() : ioctlsocket nonblocking setting failed, error %d\n", WSAGetLastError()); #else if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR) printf("ConnectSocket() : fcntl nonblocking setting failed, error %d\n", errno); #endif // Add node CNode* pnode = new CNode(hSocket, addrConnect, false); if (nTimeout != 0) pnode->AddRef(nTimeout); else pnode->AddRef(); CRITICAL_BLOCK(cs_vNodes) vNodes.push_back(pnode); pnode->nTimeConnected = GetTime(); return pnode; } else { return NULL; } } void CNode::CloseSocketDisconnect() { fDisconnect = true; if (hSocket != INVALID_SOCKET) { if (fDebug) printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str()); printf("disconnecting node %s\n", addr.ToString().c_str()); closesocket(hSocket); hSocket = INVALID_SOCKET; } } void CNode::Cleanup() { // All of a nodes broadcasts and subscriptions are automatically torn down // when it goes down, so a node has to stay up to keep its broadcast going. // Cancel subscriptions for (unsigned int nChannel = 0; nChannel < vfSubscribe.size(); nChannel++) if (vfSubscribe[nChannel]) CancelSubscribe(nChannel); } std::map CNode::setBanned; CCriticalSection CNode::cs_setBanned; void CNode::ClearBanned() { setBanned.clear(); } bool CNode::IsBanned(unsigned int ip) { bool fResult = false; CRITICAL_BLOCK(cs_setBanned) { std::map::iterator i = setBanned.find(ip); if (i != setBanned.end()) { int64 t = (*i).second; if (GetTime() < t) fResult = true; } } return fResult; } bool CNode::Misbehaving(int howmuch) { if (addr.IsLocal()) { printf("Warning: local node %s misbehaving\n", addr.ToString().c_str()); return false; } nMisbehavior += howmuch; if (nMisbehavior >= GetArg("-banscore", 100)) { int64 banTime = GetTime()+GetArg("-bantime", 60*60*24); // Default 24-hour ban CRITICAL_BLOCK(cs_setBanned) if (setBanned[addr.ip] < banTime) setBanned[addr.ip] = banTime; CloseSocketDisconnect(); printf("Disconnected %s for misbehavior (score=%d)\n", addr.ToString().c_str(), nMisbehavior); return true; } return false; } void ThreadSocketHandler(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadSocketHandler(parg)); try { vnThreadsRunning[0]++; ThreadSocketHandler2(parg); vnThreadsRunning[0]--; } catch (std::exception& e) { vnThreadsRunning[0]--; PrintException(&e, "ThreadSocketHandler()"); } catch (...) { vnThreadsRunning[0]--; throw; // support pthread_cancel() } printf("ThreadSocketHandler exiting\n"); } void ThreadSocketHandler2(void* parg) { printf("ThreadSocketHandler started\n"); list vNodesDisconnected; int nPrevNodeCount = 0; loop { // // Disconnect nodes // CRITICAL_BLOCK(cs_vNodes) { // Disconnect unused nodes vector vNodesCopy = vNodes; BOOST_FOREACH(CNode* pnode, vNodesCopy) { if (pnode->fDisconnect || (pnode->GetRefCount() <= 0 && pnode->vRecv.empty() && pnode->vSend.empty())) { // remove from vNodes vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end()); // close socket and cleanup pnode->CloseSocketDisconnect(); pnode->Cleanup(); // hold in disconnected pool until all refs are released pnode->nReleaseTime = max(pnode->nReleaseTime, GetTime() + 15 * 60); if (pnode->fNetworkNode || pnode->fInbound) pnode->Release(); vNodesDisconnected.push_back(pnode); } } // Delete disconnected nodes list vNodesDisconnectedCopy = vNodesDisconnected; BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy) { // wait until threads are done using it if (pnode->GetRefCount() <= 0) { bool fDelete = false; TRY_CRITICAL_BLOCK(pnode->cs_vSend) TRY_CRITICAL_BLOCK(pnode->cs_vRecv) TRY_CRITICAL_BLOCK(pnode->cs_mapRequests) TRY_CRITICAL_BLOCK(pnode->cs_inventory) fDelete = true; if (fDelete) { vNodesDisconnected.remove(pnode); delete pnode; } } } } if (vNodes.size() != nPrevNodeCount) { nPrevNodeCount = vNodes.size(); MainFrameRepaint(); } // // Find which sockets have data to receive // struct timeval timeout; timeout.tv_sec = 0; timeout.tv_usec = 50000; // frequency to poll pnode->vSend fd_set fdsetRecv; fd_set fdsetSend; fd_set fdsetError; FD_ZERO(&fdsetRecv); FD_ZERO(&fdsetSend); FD_ZERO(&fdsetError); SOCKET hSocketMax = 0; if(hListenSocket != INVALID_SOCKET) FD_SET(hListenSocket, &fdsetRecv); hSocketMax = max(hSocketMax, hListenSocket); CRITICAL_BLOCK(cs_vNodes) { BOOST_FOREACH(CNode* pnode, vNodes) { if (pnode->hSocket == INVALID_SOCKET) continue; FD_SET(pnode->hSocket, &fdsetRecv); FD_SET(pnode->hSocket, &fdsetError); hSocketMax = max(hSocketMax, pnode->hSocket); TRY_CRITICAL_BLOCK(pnode->cs_vSend) if (!pnode->vSend.empty()) FD_SET(pnode->hSocket, &fdsetSend); } } vnThreadsRunning[0]--; int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout); vnThreadsRunning[0]++; if (fShutdown) return; if (nSelect == SOCKET_ERROR) { int nErr = WSAGetLastError(); if (hSocketMax > -1) { printf("socket select error %d\n", nErr); for (int i = 0; i <= hSocketMax; i++) FD_SET(i, &fdsetRecv); } FD_ZERO(&fdsetSend); FD_ZERO(&fdsetError); Sleep(timeout.tv_usec/1000); } // // Accept new connections // if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv)) { struct sockaddr_in sockaddr; socklen_t len = sizeof(sockaddr); SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len); CAddress addr; int nInbound = 0; if (hSocket != INVALID_SOCKET) addr = CAddress(sockaddr); CRITICAL_BLOCK(cs_vNodes) BOOST_FOREACH(CNode* pnode, vNodes) if (pnode->fInbound) nInbound++; if (hSocket == INVALID_SOCKET) { if (WSAGetLastError() != WSAEWOULDBLOCK) printf("socket error accept failed: %d\n", WSAGetLastError()); } else if (nInbound >= GetArg("-maxconnections", 125) - MAX_OUTBOUND_CONNECTIONS) { closesocket(hSocket); } else if (CNode::IsBanned(addr.ip)) { printf("connetion from %s dropped (banned)\n", addr.ToString().c_str()); closesocket(hSocket); } else { printf("accepted connection %s\n", addr.ToString().c_str()); CNode* pnode = new CNode(hSocket, addr, true); pnode->AddRef(); CRITICAL_BLOCK(cs_vNodes) vNodes.push_back(pnode); } } // // Service each socket // vector vNodesCopy; CRITICAL_BLOCK(cs_vNodes) { vNodesCopy = vNodes; BOOST_FOREACH(CNode* pnode, vNodesCopy) pnode->AddRef(); } BOOST_FOREACH(CNode* pnode, vNodesCopy) { if (fShutdown) return; // // Receive // if (pnode->hSocket == INVALID_SOCKET) continue; if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError)) { TRY_CRITICAL_BLOCK(pnode->cs_vRecv) { CDataStream& vRecv = pnode->vRecv; unsigned int nPos = vRecv.size(); if (nPos > ReceiveBufferSize()) { if (!pnode->fDisconnect) printf("socket recv flood control disconnect (%d bytes)\n", vRecv.size()); pnode->CloseSocketDisconnect(); } else { // typical socket buffer is 8K-64K char pchBuf[0x10000]; int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT); if (nBytes > 0) { vRecv.resize(nPos + nBytes); memcpy(&vRecv[nPos], pchBuf, nBytes); pnode->nLastRecv = GetTime(); } else if (nBytes == 0) { // socket closed gracefully if (!pnode->fDisconnect) printf("socket closed\n"); pnode->CloseSocketDisconnect(); } else if (nBytes < 0) { // error int nErr = WSAGetLastError(); if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS) { if (!pnode->fDisconnect) printf("socket recv error %d\n", nErr); pnode->CloseSocketDisconnect(); } } } } } // // Send // if (pnode->hSocket == INVALID_SOCKET) continue; if (FD_ISSET(pnode->hSocket, &fdsetSend)) { TRY_CRITICAL_BLOCK(pnode->cs_vSend) { CDataStream& vSend = pnode->vSend; if (!vSend.empty()) { int nBytes = send(pnode->hSocket, &vSend[0], vSend.size(), MSG_NOSIGNAL | MSG_DONTWAIT); if (nBytes > 0) { vSend.erase(vSend.begin(), vSend.begin() + nBytes); pnode->nLastSend = GetTime(); } else if (nBytes < 0) { // error int nErr = WSAGetLastError(); if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS) { printf("socket send error %d\n", nErr); pnode->CloseSocketDisconnect(); } } if (vSend.size() > SendBufferSize()) { if (!pnode->fDisconnect) printf("socket send flood control disconnect (%d bytes)\n", vSend.size()); pnode->CloseSocketDisconnect(); } } } } // // Inactivity checking // if (pnode->vSend.empty()) pnode->nLastSendEmpty = GetTime(); if (GetTime() - pnode->nTimeConnected > 60) { if (pnode->nLastRecv == 0 || pnode->nLastSend == 0) { printf("socket no message in first 60 seconds, %d %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0); pnode->fDisconnect = true; } else if (GetTime() - pnode->nLastSend > 90*60 && GetTime() - pnode->nLastSendEmpty > 90*60) { printf("socket not sending\n"); pnode->fDisconnect = true; } else if (GetTime() - pnode->nLastRecv > 90*60) { printf("socket inactivity timeout\n"); pnode->fDisconnect = true; } } } CRITICAL_BLOCK(cs_vNodes) { BOOST_FOREACH(CNode* pnode, vNodesCopy) pnode->Release(); } Sleep(10); } } #ifdef USE_UPNP void ThreadMapPort(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadMapPort(parg)); try { vnThreadsRunning[5]++; ThreadMapPort2(parg); vnThreadsRunning[5]--; } catch (std::exception& e) { vnThreadsRunning[5]--; PrintException(&e, "ThreadMapPort()"); } catch (...) { vnThreadsRunning[5]--; PrintException(NULL, "ThreadMapPort()"); } printf("ThreadMapPort exiting\n"); } void ThreadMapPort2(void* parg) { printf("ThreadMapPort started\n"); char port[6]; sprintf(port, "%d", GetListenPort()); const char * multicastif = 0; const char * minissdpdpath = 0; struct UPNPDev * devlist = 0; char lanaddr[64]; #ifndef UPNPDISCOVER_SUCCESS /* miniupnpc 1.5 */ devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0); #else /* miniupnpc 1.6 */ int error = 0; devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0, 0, &error); #endif struct UPNPUrls urls; struct IGDdatas data; int r; r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr)); if (r == 1) { if (!addrLocalHost.IsRoutable()) { char externalIPAddress[40]; r = UPNP_GetExternalIPAddress(urls.controlURL, data.first.servicetype, externalIPAddress); if(r != UPNPCOMMAND_SUCCESS) printf("UPnP: GetExternalIPAddress() returned %d\n", r); else { if(externalIPAddress[0]) { printf("UPnP: ExternalIPAddress = %s\n", externalIPAddress); CAddress addrExternalFromUPnP(externalIPAddress, 0, false, nLocalServices); if (addrExternalFromUPnP.IsRoutable()) addrLocalHost = addrExternalFromUPnP; } else printf("UPnP: GetExternalIPAddress failed.\n"); } } string strDesc = "Bitcoin " + FormatFullVersion(); #ifndef UPNPDISCOVER_SUCCESS /* miniupnpc 1.5 */ r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype, port, port, lanaddr, strDesc.c_str(), "TCP", 0); #else /* miniupnpc 1.6 */ r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype, port, port, lanaddr, strDesc.c_str(), "TCP", 0, "0"); #endif if(r!=UPNPCOMMAND_SUCCESS) printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n", port, port, lanaddr, r, strupnperror(r)); else printf("UPnP Port Mapping successful.\n"); int i = 1; loop { if (fShutdown || !fUseUPnP) { r = UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype, port, "TCP", 0); printf("UPNP_DeletePortMapping() returned : %d\n", r); freeUPNPDevlist(devlist); devlist = 0; FreeUPNPUrls(&urls); return; } if (i % 600 == 0) // Refresh every 20 minutes { #ifndef UPNPDISCOVER_SUCCESS /* miniupnpc 1.5 */ r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype, port, port, lanaddr, strDesc.c_str(), "TCP", 0); #else /* miniupnpc 1.6 */ r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype, port, port, lanaddr, strDesc.c_str(), "TCP", 0, "0"); #endif if(r!=UPNPCOMMAND_SUCCESS) printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n", port, port, lanaddr, r, strupnperror(r)); else printf("UPnP Port Mapping successful.\n");; } Sleep(2000); i++; } } else { printf("No valid UPnP IGDs found\n"); freeUPNPDevlist(devlist); devlist = 0; if (r != 0) FreeUPNPUrls(&urls); loop { if (fShutdown || !fUseUPnP) return; Sleep(2000); } } } void MapPort(bool fMapPort) { if (fUseUPnP != fMapPort) { fUseUPnP = fMapPort; WriteSetting("fUseUPnP", fUseUPnP); } if (fUseUPnP && vnThreadsRunning[5] < 1) { if (!CreateThread(ThreadMapPort, NULL)) printf("Error: ThreadMapPort(ThreadMapPort) failed\n"); } } #else void MapPort(bool /* unused fMapPort */) { // Intentionally left blank. } #endif static const char *strDNSSeed[] = { "bitseed.xf2.org", "dnsseed.bluematt.me", "seed.bitcoin.sipa.be", "dnsseed.bitcoin.dashjr.org", }; void ThreadDNSAddressSeed(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadDNSAddressSeed(parg)); try { vnThreadsRunning[6]++; ThreadDNSAddressSeed2(parg); vnThreadsRunning[6]--; } catch (std::exception& e) { vnThreadsRunning[6]--; PrintException(&e, "ThreadDNSAddressSeed()"); } catch (...) { vnThreadsRunning[6]--; throw; // support pthread_cancel() } printf("ThreadDNSAddressSeed exiting\n"); } void ThreadDNSAddressSeed2(void* parg) { printf("ThreadDNSAddressSeed started\n"); int found = 0; if (!fTestNet) { printf("Loading addresses from DNS seeds (could take a while)\n"); for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) { vector vaddr; if (Lookup(strDNSSeed[seed_idx], vaddr, NODE_NETWORK, -1, true)) { CAddrDB addrDB; addrDB.TxnBegin(); BOOST_FOREACH (CAddress& addr, vaddr) { if (addr.GetByte(3) != 127) { addr.nTime = 0; AddAddress(addr, 0, &addrDB); found++; } } addrDB.TxnCommit(); // Save addresses (it's ok if this fails) } } } printf("%d addresses found from DNS seeds\n", found); } unsigned int pnSeed[] = { 0x959bd347, 0xf8de42b2, 0x73bc0518, 0xea6edc50, 0x21b00a4d, 0xc725b43d, 0xd665464d, 0x1a2a770e, 0x27c93946, 0x65b2fa46, 0xb80ae255, 0x66b3b446, 0xb1877a3e, 0x6ee89e3e, 0xc3175b40, 0x2a01a83c, 0x95b1363a, 0xa079ad3d, 0xe6ca801f, 0x027f4f4a, 0x34f7f03a, 0xf790f04a, 0x16ca801f, 0x2f4d5e40, 0x3a4d5e40, 0xc43a322e, 0xc8159753, 0x14d4724c, 0x7919a118, 0xe0bdb34e, 0x68a16b2e, 0xff64b44d, 0x6099115b, 0x9b57b05b, 0x7bd1b4ad, 0xdf95944f, 0x29d2b73d, 0xafa8db79, 0xe247ba41, 0x24078348, 0xf722f03c, 0x33567ebc, 0xace64ed4, 0x984d3932, 0xb5f34e55, 0x27b7024d, 0x94579247, 0x8894042e, 0x9357d34c, 0x1063c24b, 0xcaa228b1, 0xa3c5a8b2, 0x5dc64857, 0xa2c23643, 0xa8369a54, 0x31203077, 0x00707c5c, 0x09fc0b3a, 0x272e9e2e, 0xf80f043e, 0x9449ca3e, 0x5512c33e, 0xd106b555, 0xe8024157, 0xe288ec29, 0xc79c5461, 0xafb63932, 0xdb02ab4b, 0x0e512777, 0x8a145a4c, 0xb201ff4f, 0x5e09314b, 0xcd9bfbcd, 0x1c023765, 0x4394e75c, 0xa728bd4d, 0x65331552, 0xa98420b1, 0x89ecf559, 0x6e80801f, 0xf404f118, 0xefd62b51, 0x05918346, 0x9b186d5f, 0xacabab46, 0xf912e255, 0xc188ea62, 0xcc55734e, 0xc668064d, 0xd77a4558, 0x46201c55, 0xf17dfc80, 0xf7142f2e, 0x87bfb718, 0x8aa54fb2, 0xc451d518, 0xc4ae8831, 0x8dd44d55, 0x5bbd206c, 0x64536b5d, 0x5c667e60, 0x3b064242, 0xfe963a42, 0xa28e6dc8, 0xe8a9604a, 0xc989464e, 0xd124a659, 0x50065140, 0xa44dfe5e, 0x1079e655, 0x3fb986d5, 0x47895b18, 0x7d3ce4ad, 0x4561ba50, 0x296eec62, 0x255b41ad, 0xaed35ec9, 0x55556f12, 0xc7d3154d, 0x3297b65d, 0x8930121f, 0xabf42e4e, 0x4a29e044, 0x1212685d, 0x676c1e40, 0xce009744, 0x383a8948, 0xa2dbd0ad, 0xecc2564d, 0x07dbc252, 0x887ee24b, 0x5171644c, 0x6bb798c1, 0x847f495d, 0x4cbb7145, 0x3bb81c32, 0x45eb262e, 0xc8015a4e, 0x250a361b, 0xf694f946, 0xd64a183e, 0xd4f1dd59, 0x8f20ffd4, 0x51d9e55c, 0x09521763, 0x5e02002e, 0x32c8074d, 0xe685762e, 0x8290b0bc, 0x762a922e, 0xfc5ee754, 0x83a24829, 0x775b224d, 0x6295bb4d, 0x38ec0555, 0xbffbba50, 0xe5560260, 0x86b16a7c, 0xd372234e, 0x49a3c24b, 0x2f6a171f, 0x4d75ed60, 0xae94115b, 0xcb543744, 0x63080c59, 0x3f9c724c, 0xc977ce18, 0x532efb18, 0x69dc3b2e, 0x5f94d929, 0x1732bb4d, 0x9c814b4d, 0xe6b3762e, 0xc024f662, 0x8face35b, 0x6b5b044d, 0x798c7b57, 0x79a6b44c, 0x067d3057, 0xf9e94e5f, 0x91cbe15b, 0x71405eb2, 0x2662234e, 0xcbcc4a6d, 0xbf69d54b, 0xa79b4e55, 0xec6d3e51, 0x7c0b3c02, 0x60f83653, 0x24c1e15c, 0x1110b62e, 0x10350f59, 0xa56f1d55, 0x3509e7a9, 0xeb128354, 0x14268e2e, 0x934e28bc, 0x8e32692e, 0x8331a21f, 0x3e633932, 0xc812b12e, 0xc684bf2e, 0x80112d2e, 0xe0ddc96c, 0xc630ca4a, 0x5c09b3b2, 0x0b580518, 0xc8e9d54b, 0xd169aa43, 0x17d0d655, 0x1d029963, 0x7ff87559, 0xcb701f1f, 0x6fa3e85d, 0xe45e9a54, 0xf05d1802, 0x44d03b2e, 0x837b692e, 0xccd4354e, 0x3d6da13c, 0x3423084d, 0xf707c34a, 0x55f6db3a, 0xad26e442, 0x6233a21f, 0x09e80e59, 0x8caeb54d, 0xbe870941, 0xb407d20e, 0x20b51018, 0x56fb152e, 0x460d2a4e, 0xbb9a2946, 0x560eb12e, 0xed83dd29, 0xd6724f53, 0xa50aafb8, 0x451346d9, 0x88348e2e, 0x7312fead, 0x8ecaf96f, 0x1bda4e5f, 0xf1671e40, 0x3c8c3e3b, 0x4716324d, 0xdde24ede, 0xf98cd17d, 0xa91d4644, 0x28124eb2, 0x147d5129, 0xd022042e, 0x61733d3b, 0xad0d5e02, 0x8ce2932e, 0xe5c18502, 0x549c1e32, 0x9685801f, 0x86e217ad, 0xd948214b, 0x4110f462, 0x3a2e894e, 0xbd35492e, 0x87e0d558, 0x64b8ef7d, 0x7c3eb962, 0x72a84b3e, 0x7cd667c9, 0x28370a2e, 0x4bc60e7b, 0x6fc1ec60, 0x14a6983f, 0x86739a4b, 0x46954e5f, 0x32e2e15c, 0x2e9326cf, 0xe5801c5e, 0x379607b2, 0x32151145, 0xf0e39744, 0xacb54c55, 0xa37dfb60, 0x83b55cc9, 0x388f7ca5, 0x15034f5f, 0x3e94965b, 0x68e0ffad, 0x35280f59, 0x8fe190cf, 0x7c6ba5b2, 0xa5e9db43, 0x4ee1fc60, 0xd9d94e5f, 0x04040677, 0x0ea9b35e, 0x5961f14f, 0x67fda063, 0xa48a5a31, 0xc6524e55, 0x283d325e, 0x3f37515f, 0x96b94b3e, 0xacce620e, 0x6481cc5b, 0xa4a06d4b, 0x9e95d2d9, 0xe40c03d5, 0xc2f4514b, 0xb79aad44, 0xf64be843, 0xb2064070, 0xfca00455, 0x429dfa4e, 0x2323f173, 0xeda4185e, 0xabd5227d, 0x9efd4d58, 0xb1104758, 0x4811e955, 0xbd9ab355, 0xe921f44b, 0x9f166dce, 0x09e279b2, 0xe0c9ac7b, 0x7901a5ad, 0xa145d4b0, 0x79104671, 0xec31e35a, 0x4fe0b555, 0xc7d9cbad, 0xad057f55, 0xe94cc759, 0x7fe0b043, 0xe4529f2e, 0x0d4dd4b2, 0x9f11a54d, 0x031e2e4e, 0xe6014f5f, 0x11d1ca6c, 0x26bd7f61, 0xeb86854f, 0x4d347b57, 0x116bbe2e, 0xdba7234e, 0x7bcbfd2e, 0x174dd4b2, 0x6686762e, 0xb089ba50, 0xc6258246, 0x087e767b, 0xc4a8cb4a, 0x595dba50, 0x7f0ae502, 0x7b1dbd5a, 0xa0603492, 0x57d1af4b, 0x9e21ffd4, 0x6393064d, 0x7407376e, 0xe484762e, 0x122a4e53, 0x4a37aa43, 0x3888a6be, 0xee77864e, 0x039c8dd5, 0x688d89af, 0x0e988f62, 0x08218246, 0xfc2f8246, 0xd1d97040, 0xd64cd4b2, 0x5ae4a6b8, 0x7d0de9bc, 0x8d304d61, 0x06c5c672, 0xa4c8bd4d, 0xe0fd373b, 0x575ebe4d, 0x72d26277, 0x55570f55, 0x77b154d9, 0xe214293a, 0xfc740f4b, 0xfe3f6a57, 0xa9c55f02, 0xae4054db, 0x2394d918, 0xb511b24a, 0xb8741ab2, 0x0758e65e, 0xc7b5795b, 0xb0a30a4c, 0xaf7f170c, 0xf3b4762e, 0x8179576d, 0x738a1581, 0x4b95b64c, 0x9829b618, 0x1bea932e, 0x7bdeaa4b, 0xcb5e0281, 0x65618f54, 0x0658474b, 0x27066acf, 0x40556d65, 0x7d204d53, 0xf28bc244, 0xdce23455, 0xadc0ff54, 0x3863c948, 0xcee34e5f, 0xdeb85e02, 0x2ed17a61, 0x6a7b094d, 0x7f0cfc40, 0x59603f54, 0x3220afbc, 0xb5dfd962, 0x125d21c0, 0x13f8d243, 0xacfefb4e, 0x86c2c147, 0x3d8bbd59, 0xbd02a21f, 0x2593042e, 0xc6a17a7c, 0x28925861, 0xb487ed44, 0xb5f4fd6d, 0x90c28a45, 0x5a14f74d, 0x43d71b4c, 0x728ebb5d, 0x885bf950, 0x08134dd0, 0x38ec046e, 0xc575684b, 0x50082d2e, 0xa2f47757, 0x270f86ae, 0xf3ff6462, 0x10ed3f4e, 0x4b58d462, 0xe01ce23e, 0x8c5b092e, 0x63e52f4e, 0x22c1e85d, 0xa908f54e, 0x8591624f, 0x2c0fb94e, 0xa280ba3c, 0xb6f41b4c, 0x24f9aa47, 0x27201647, 0x3a3ea6dc, 0xa14fc3be, 0x3c34bdd5, 0x5b8d4f5b, 0xaadeaf4b, 0xc71cab50, 0x15697a4c, 0x9a1a734c, 0x2a037d81, 0x2590bd59, 0x48ec2741, 0x53489c5b, 0x7f00314b, 0x2170d362, 0xf2e92542, 0x42c10b44, 0x98f0f118, 0x883a3456, 0x099a932e, 0xea38f7bc, 0x644e9247, 0xbb61b62e, 0x30e0863d, 0x5f51be54, 0x207215c7, 0x5f306c45, 0xaa7f3932, 0x98da7d45, 0x4e339b59, 0x2e411581, 0xa808f618, 0xad2c0c59, 0x54476741, 0x09e99fd1, 0x5db8f752, 0xc16df8bd, 0x1dd4b44f, 0x106edf2e, 0x9e15c180, 0x2ad6b56f, 0x633a5332, 0xff33787c, 0x077cb545, 0x6610be6d, 0x75aad2c4, 0x72fb4d5b, 0xe81e0f59, 0x576f6332, 0x47333373, 0x351ed783, 0x2d90fb50, 0x8d5e0f6c, 0x5b27a552, 0xdb293ebb, 0xe55ef950, 0x4b133ad8, 0x75df975a, 0x7b6a8740, 0xa899464b, 0xfab15161, 0x10f8b64d, 0xd055ea4d, 0xee8e146b, 0x4b14afb8, 0x4bc1c44a, 0x9b961dcc, 0xd111ff43, 0xfca0b745, 0xc800e412, 0x0afad9d1, 0xf751c350, 0xf9f0cccf, 0xa290a545, 0x8ef13763, 0x7ec70d59, 0x2b066acf, 0x65496c45, 0xade02c1b, 0xae6eb077, 0x92c1e65b, 0xc064e6a9, 0xc649e56d, 0x5287a243, 0x36de4f5b, 0x5b1df6ad, 0x65c39a59, 0xdba805b2, 0x20067aa8, 0x6457e56d, 0x3cee26cf, 0xfd3ff26d, 0x04f86d4a, 0x06b8e048, 0xa93bcd5c, 0x91135852, 0xbe90a643, 0x8fa0094d, 0x06d8215f, 0x2677094d, 0xd735685c, 0x164a00c9, 0x5209ac5f, 0xa9564c5c, 0x3b504f5f, 0xcc826bd0, 0x4615042e, 0x5fe13b4a, 0x8c81b86d, 0x879ab68c, 0x1de564b8, 0x434487d8, 0x2dcb1b63, 0x82ab524a, 0xb0676abb, 0xa13d9c62, 0xdbb5b86d, 0x5b7f4b59, 0xaddfb44d, 0xad773532, 0x3997054c, 0x72cebd89, 0xb194544c, 0xc5b8046e, 0x6e1adeb2, 0xaa5abb51, 0xefb54b44, 0x15efc54f, 0xe9f1bc4d, 0x5f401b6c, 0x97f018ad, 0xc82f9252, 0x2cdc762e, 0x8e52e56d, 0x1827175e, 0x9b7d7d80, 0xb2ad6845, 0x51065140, 0x71180a18, 0x5b27006c, 0x0621e255, 0x721cbe58, 0x670c0cb8, 0xf8bd715d, 0xe0bdc5d9, 0xed843501, 0x4b84554d, 0x7f1a18bc, 0x53bcaf47, 0x5729d35f, 0xf0dda246, 0x22382bd0, 0x4d641fb0, 0x316afcde, 0x50a22f1f, 0x73608046, 0xc461d84a, 0xb2dbe247, }; void ThreadOpenConnections(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadOpenConnections(parg)); try { vnThreadsRunning[1]++; ThreadOpenConnections2(parg); vnThreadsRunning[1]--; } catch (std::exception& e) { vnThreadsRunning[1]--; PrintException(&e, "ThreadOpenConnections()"); } catch (...) { vnThreadsRunning[1]--; PrintException(NULL, "ThreadOpenConnections()"); } printf("ThreadOpenConnections exiting\n"); } void ThreadOpenConnections2(void* parg) { printf("ThreadOpenConnections started\n"); // Connect to specific addresses if (mapArgs.count("-connect")) { for (int64 nLoop = 0;; nLoop++) { BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"]) { CAddress addr(strAddr, fAllowDNS); if (addr.IsValid()) OpenNetworkConnection(addr); for (int i = 0; i < 10 && i < nLoop; i++) { Sleep(500); if (fShutdown) return; } } } } // Connect to manually added nodes first if (mapArgs.count("-addnode")) { BOOST_FOREACH(string strAddr, mapMultiArgs["-addnode"]) { CAddress addr(strAddr, fAllowDNS); if (addr.IsValid()) { OpenNetworkConnection(addr); Sleep(500); if (fShutdown) return; } } } // Initiate network connections int64 nStart = GetTime(); loop { vnThreadsRunning[1]--; Sleep(500); vnThreadsRunning[1]++; if (fShutdown) return; // Limit outbound connections loop { int nOutbound = 0; CRITICAL_BLOCK(cs_vNodes) BOOST_FOREACH(CNode* pnode, vNodes) if (!pnode->fInbound) nOutbound++; int nMaxOutboundConnections = MAX_OUTBOUND_CONNECTIONS; nMaxOutboundConnections = min(nMaxOutboundConnections, (int)GetArg("-maxconnections", 125)); if (nOutbound < nMaxOutboundConnections) break; vnThreadsRunning[1]--; Sleep(2000); vnThreadsRunning[1]++; if (fShutdown) return; } bool fAddSeeds = false; CRITICAL_BLOCK(cs_mapAddresses) { // Add seed nodes if IRC isn't working bool fTOR = (fUseProxy && addrProxy.port == htons(9050)); if (mapAddresses.empty() && (GetTime() - nStart > 60 || fUseProxy) && !fTestNet) fAddSeeds = true; } if (fAddSeeds) { for (int i = 0; i < ARRAYLEN(pnSeed); i++) { // It'll only connect to one or two seed nodes because once it connects, // it'll get a pile of addresses with newer timestamps. // Seed nodes are given a random 'last seen time' of between one and two // weeks ago. const int64 nOneWeek = 7*24*60*60; CAddress addr; addr.ip = pnSeed[i]; addr.nTime = GetTime()-GetRand(nOneWeek)-nOneWeek; AddAddress(addr); } } // // Choose an address to connect to based on most recently seen // CAddress addrConnect; int64 nBest = INT64_MIN; // Only connect to one address per a.b.?.? range. // Do this here so we don't have to critsect vNodes inside mapAddresses critsect. set setConnected; CRITICAL_BLOCK(cs_vNodes) BOOST_FOREACH(CNode* pnode, vNodes) setConnected.insert(pnode->addr.ip & 0x0000ffff); int64 nANow = GetAdjustedTime(); CRITICAL_BLOCK(cs_mapAddresses) { BOOST_FOREACH(const PAIRTYPE(vector, CAddress)& item, mapAddresses) { const CAddress& addr = item.second; if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.ip & 0x0000ffff)) continue; int64 nSinceLastSeen = nANow - addr.nTime; int64 nSinceLastTry = nANow - addr.nLastTry; // Randomize the order in a deterministic way, putting the standard port first int64 nRandomizer = (uint64)(nStart * 4951 + addr.nLastTry * 9567851 + addr.ip * 7789) % (2 * 60 * 60); if (addr.port != htons(GetDefaultPort())) nRandomizer += 2 * 60 * 60; // Last seen Base retry frequency // <1 hour 10 min // 1 hour 1 hour // 4 hours 2 hours // 24 hours 5 hours // 48 hours 7 hours // 7 days 13 hours // 30 days 27 hours // 90 days 46 hours // 365 days 93 hours int64 nDelay = (int64)(3600.0 * sqrt(fabs((double)nSinceLastSeen) / 3600.0) + nRandomizer); // Fast reconnect for one hour after last seen if (nSinceLastSeen < 60 * 60) nDelay = 10 * 60; // Limit retry frequency if (nSinceLastTry < nDelay) continue; // If we have IRC, we'll be notified when they first come online, // and again every 24 hours by the refresh broadcast. if (nGotIRCAddresses > 0 && vNodes.size() >= 2 && nSinceLastSeen > 24 * 60 * 60) continue; // Only try the old stuff if we don't have enough connections if (vNodes.size() >= 8 && nSinceLastSeen > 24 * 60 * 60) continue; // If multiple addresses are ready, prioritize by time since // last seen and time since last tried. int64 nScore = min(nSinceLastTry, (int64)24 * 60 * 60) - nSinceLastSeen - nRandomizer; if (nScore > nBest) { nBest = nScore; addrConnect = addr; } } } if (addrConnect.IsValid()) OpenNetworkConnection(addrConnect); } } bool OpenNetworkConnection(const CAddress& addrConnect) { // // Initiate outbound network connection // if (fShutdown) return false; if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() || FindNode(addrConnect.ip) || CNode::IsBanned(addrConnect.ip)) return false; vnThreadsRunning[1]--; CNode* pnode = ConnectNode(addrConnect); vnThreadsRunning[1]++; if (fShutdown) return false; if (!pnode) return false; pnode->fNetworkNode = true; return true; } void ThreadMessageHandler(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadMessageHandler(parg)); try { vnThreadsRunning[2]++; ThreadMessageHandler2(parg); vnThreadsRunning[2]--; } catch (std::exception& e) { vnThreadsRunning[2]--; PrintException(&e, "ThreadMessageHandler()"); } catch (...) { vnThreadsRunning[2]--; PrintException(NULL, "ThreadMessageHandler()"); } printf("ThreadMessageHandler exiting\n"); } void ThreadMessageHandler2(void* parg) { printf("ThreadMessageHandler started\n"); SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL); while (!fShutdown) { vector vNodesCopy; CRITICAL_BLOCK(cs_vNodes) { vNodesCopy = vNodes; BOOST_FOREACH(CNode* pnode, vNodesCopy) pnode->AddRef(); } // Poll the connected nodes for messages CNode* pnodeTrickle = NULL; if (!vNodesCopy.empty()) pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())]; BOOST_FOREACH(CNode* pnode, vNodesCopy) { // Receive messages TRY_CRITICAL_BLOCK(pnode->cs_vRecv) ProcessMessages(pnode); if (fShutdown) return; // Send messages TRY_CRITICAL_BLOCK(pnode->cs_vSend) SendMessages(pnode, pnode == pnodeTrickle); if (fShutdown) return; } CRITICAL_BLOCK(cs_vNodes) { BOOST_FOREACH(CNode* pnode, vNodesCopy) pnode->Release(); } // Wait and allow messages to bunch up. // Reduce vnThreadsRunning so StopNode has permission to exit while // we're sleeping, but we must always check fShutdown after doing this. vnThreadsRunning[2]--; Sleep(100); if (fRequestShutdown) Shutdown(NULL); vnThreadsRunning[2]++; if (fShutdown) return; } } bool BindListenPort(string& strError) { strError = ""; int nOne = 1; addrLocalHost.port = htons(GetListenPort()); #ifdef WIN32 // Initialize Windows Sockets WSADATA wsadata; int ret = WSAStartup(MAKEWORD(2,2), &wsadata); if (ret != NO_ERROR) { strError = strprintf("Error: TCP/IP socket library failed to start (WSAStartup returned error %d)", ret); printf("%s\n", strError.c_str()); return false; } #endif // Create socket for listening for incoming connections hListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (hListenSocket == INVALID_SOCKET) { strError = strprintf("Error: Couldn't open socket for incoming connections (socket returned error %d)", WSAGetLastError()); printf("%s\n", strError.c_str()); return false; } #ifdef SO_NOSIGPIPE // Different way of disabling SIGPIPE on BSD setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int)); #endif #ifndef WIN32 // Allow binding if the port is still in TIME_WAIT state after // the program was closed and restarted. Not an issue on windows. setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int)); #endif #ifdef WIN32 // Set to nonblocking, incoming connections will also inherit this if (ioctlsocket(hListenSocket, FIONBIO, (u_long*)&nOne) == SOCKET_ERROR) #else if (fcntl(hListenSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR) #endif { strError = strprintf("Error: Couldn't set properties on socket for incoming connections (error %d)", WSAGetLastError()); printf("%s\n", strError.c_str()); return false; } // The sockaddr_in structure specifies the address family, // IP address, and port for the socket that is being bound struct sockaddr_in sockaddr; memset(&sockaddr, 0, sizeof(sockaddr)); sockaddr.sin_family = AF_INET; sockaddr.sin_addr.s_addr = INADDR_ANY; // bind to all IPs on this computer sockaddr.sin_port = htons(GetListenPort()); if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR) { int nErr = WSAGetLastError(); if (nErr == WSAEADDRINUSE) strError = strprintf(_("Unable to bind to port %d on this computer. Bitcoin is probably already running."), ntohs(sockaddr.sin_port)); else strError = strprintf("Error: Unable to bind to port %d on this computer (bind returned error %d)", ntohs(sockaddr.sin_port), nErr); printf("%s\n", strError.c_str()); return false; } printf("Bound to port %d\n", ntohs(sockaddr.sin_port)); // Listen for incoming connections if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR) { strError = strprintf("Error: Listening for incoming connections failed (listen returned error %d)", WSAGetLastError()); printf("%s\n", strError.c_str()); return false; } return true; } void StartNode(void* parg) { if (pnodeLocalHost == NULL) pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress("127.0.0.1", 0, false, nLocalServices)); #ifdef WIN32 // Get local host ip char pszHostName[1000] = ""; if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR) { vector vaddr; if (Lookup(pszHostName, vaddr, nLocalServices, -1, true)) BOOST_FOREACH (const CAddress &addr, vaddr) if (addr.GetByte(3) != 127) { addrLocalHost = addr; break; } } #else // Get local host ip struct ifaddrs* myaddrs; if (getifaddrs(&myaddrs) == 0) { for (struct ifaddrs* ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next) { if (ifa->ifa_addr == NULL) continue; if ((ifa->ifa_flags & IFF_UP) == 0) continue; if (strcmp(ifa->ifa_name, "lo") == 0) continue; if (strcmp(ifa->ifa_name, "lo0") == 0) continue; char pszIP[100]; if (ifa->ifa_addr->sa_family == AF_INET) { struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr); if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s4->sin_addr), pszIP, sizeof(pszIP)) != NULL) printf("ipv4 %s: %s\n", ifa->ifa_name, pszIP); // Take the first IP that isn't loopback 127.x.x.x CAddress addr(*(unsigned int*)&s4->sin_addr, GetListenPort(), nLocalServices); if (addr.IsValid() && addr.GetByte(3) != 127) { addrLocalHost = addr; break; } } else if (ifa->ifa_addr->sa_family == AF_INET6) { struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr); if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s6->sin6_addr), pszIP, sizeof(pszIP)) != NULL) printf("ipv6 %s: %s\n", ifa->ifa_name, pszIP); } } freeifaddrs(myaddrs); } #endif printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str()); if (fUseProxy || mapArgs.count("-connect") || fNoListen) { // Proxies can't take incoming connections addrLocalHost.ip = CAddress("0.0.0.0").ip; printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str()); } else { CreateThread(ThreadGetMyExternalIP, NULL); } // // Start threads // if (GetBoolArg("-nodnsseed")) printf("DNS seeding disabled\n"); else if (!CreateThread(ThreadDNSAddressSeed, NULL)) printf("Error: CreateThread(ThreadDNSAddressSeed) failed\n"); // Map ports with UPnP if (fHaveUPnP) MapPort(fUseUPnP); // Get addresses from IRC and advertise ours if (!CreateThread(ThreadIRCSeed, NULL)) printf("Error: CreateThread(ThreadIRCSeed) failed\n"); // Send and receive from sockets, accept connections if (!CreateThread(ThreadSocketHandler, NULL)) printf("Error: CreateThread(ThreadSocketHandler) failed\n"); // Initiate outbound connections if (!CreateThread(ThreadOpenConnections, NULL)) printf("Error: CreateThread(ThreadOpenConnections) failed\n"); // Process messages if (!CreateThread(ThreadMessageHandler, NULL)) printf("Error: CreateThread(ThreadMessageHandler) failed\n"); // Generate coins in the background GenerateBitcoins(fGenerateBitcoins, pwalletMain); } bool StopNode() { printf("StopNode()\n"); fShutdown = true; nTransactionsUpdated++; int64 nStart = GetTime(); while (vnThreadsRunning[0] > 0 || vnThreadsRunning[1] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0 #ifdef USE_UPNP || vnThreadsRunning[5] > 0 #endif ) { if (GetTime() - nStart > 20) break; Sleep(20); } if (vnThreadsRunning[0] > 0) printf("ThreadSocketHandler still running\n"); if (vnThreadsRunning[1] > 0) printf("ThreadOpenConnections still running\n"); if (vnThreadsRunning[2] > 0) printf("ThreadMessageHandler still running\n"); if (vnThreadsRunning[3] > 0) printf("ThreadBitcoinMiner still running\n"); if (vnThreadsRunning[4] > 0) printf("ThreadRPCServer still running\n"); if (fHaveUPnP && vnThreadsRunning[5] > 0) printf("ThreadMapPort still running\n"); if (vnThreadsRunning[6] > 0) printf("ThreadDNSAddressSeed still running\n"); while (vnThreadsRunning[2] > 0 || vnThreadsRunning[4] > 0) Sleep(20); Sleep(50); return true; } class CNetCleanup { public: CNetCleanup() { } ~CNetCleanup() { // Close sockets BOOST_FOREACH(CNode* pnode, vNodes) if (pnode->hSocket != INVALID_SOCKET) closesocket(pnode->hSocket); if (hListenSocket != INVALID_SOCKET) if (closesocket(hListenSocket) == SOCKET_ERROR) printf("closesocket(hListenSocket) failed with error %d\n", WSAGetLastError()); #ifdef WIN32 // Shutdown Windows Sockets WSACleanup(); #endif } } instance_of_cnetcleanup;