// Copyright (c) 2009-2010 Satoshi Nakamoto // 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" static const int MAX_OUTBOUND_CONNECTIONS = 8; void ThreadMessageHandler2(void* parg); void ThreadSocketHandler2(void* parg); void ThreadOpenConnections2(void* parg); bool OpenNetworkConnection(const CAddress& addrConnect); // // Global state variables // bool fClient = false; uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK); CAddress addrLocalHost(0, 0, nLocalServices); CNode* pnodeLocalHost = NULL; uint64 nLocalHostNonce = 0; array vnThreadsRunning; 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; CAddress addrProxy("127.0.0.1:9050"); 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) { hSocketRet = INVALID_SOCKET; SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (hSocket == INVALID_SOCKET) return false; #ifdef BSD int set = 1; setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int)); #endif bool fRoutable = !(addrConnect.GetByte(3) == 10 || (addrConnect.GetByte(3) == 192 && addrConnect.GetByte(2) == 168)); bool fProxy = (fUseProxy && fRoutable); struct sockaddr_in sockaddr = (fProxy ? addrProxy.GetSockAddr() : addrConnect.GetSockAddr()); if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR) { closesocket(hSocket); return false; } if (fProxy) { printf("proxy connecting %s\n", addrConnect.ToStringLog().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.ToStringLog().c_str()); } hSocketRet = hSocket; return true; } 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.c_str()); 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) { struct hostent* phostent = gethostbyname("checkip.dyndns.org"); if (phostent && phostent->h_addr_list && phostent->h_addr_list[0]) addrConnect = CAddress(*(u_long*)phostent->h_addr_list[0], htons(80)); } 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) { struct hostent* phostent = gethostbyname("www.showmyip.com"); if (phostent && phostent->h_addr_list && phostent->h_addr_list[0]) addrConnect = CAddress(*(u_long*)phostent->h_addr_list[0], htons(80)); } 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) foreach(CNode* pnode, vNodes) pnode->PushAddress(addr); } } } bool AddAddress(CAddress addr, int64 nTimePenalty) { if (!addr.IsRoutable()) return false; if (addr.ip == addrLocalHost.ip) return false; addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty); CRITICAL_BLOCK(cs_mapAddresses) { map, CAddress>::iterator it = mapAddresses.find(addr.GetKey()); if (it == mapAddresses.end()) { // New address printf("AddAddress(%s)\n", addr.ToStringLog().c_str()); mapAddresses.insert(make_pair(addr.GetKey(), addr)); CAddrDB().WriteAddress(addr); return true; } else { bool fUpdated = false; CAddress& 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; } if (fUpdated) CAddrDB().WriteAddress(addrFound); } } return false; } void AddressCurrentlyConnected(const CAddress& addr) { CRITICAL_BLOCK(cs_mapAddresses) { // Only if it's been published already map, CAddress>::iterator it = mapAddresses.find(addr.GetKey()); if (it != mapAddresses.end()) { CAddress& addrFound = (*it).second; int64 nUpdateInterval = 20 * 60; if (addrFound.nTime < GetAdjustedTime() - nUpdateInterval) { // Periodically update most recently seen time addrFound.nTime = GetAdjustedTime(); CAddrDB addrdb; addrdb.WriteAddress(addrFound); } } } } 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) { 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) 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) 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) foreach(CNode* pnode, vNodes) if (pnode != this) pnode->PushMessage("sub-cancel", nChannel); } } CNode* FindNode(unsigned int ip) { CRITICAL_BLOCK(cs_vNodes) { foreach(CNode* pnode, vNodes) if (pnode->addr.ip == ip) return (pnode); } return NULL; } CNode* FindNode(CAddress addr) { CRITICAL_BLOCK(cs_vNodes) { 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.ToStringLog().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.ToStringLog().c_str()); // Set to nonblocking #ifdef __WXMSW__ 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.ToStringLog().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); } 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; 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; 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) { foreach(CNode* pnode, vNodes) { if (pnode->hSocket == INVALID_SOCKET || pnode->hSocket < 0) 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(); 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(sockaddr); int nInbound = 0; CRITICAL_BLOCK(cs_vNodes) 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 { printf("accepted connection %s\n", addr.ToStringLog().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; foreach(CNode* pnode, vNodesCopy) pnode->AddRef(); } 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 > 1000*GetArg("-maxreceivebuffer", 10*1000)) { 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() > 1000*GetArg("-maxsendbuffer", 10*1000)) { 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) { foreach(CNode* pnode, vNodesCopy) pnode->Release(); } Sleep(10); } } static const char *strDNSSeed[] = { "bitseed.xf2.org", }; void DNSAddressSeed() { int found = 0; printf("Loading addresses from DNS seeds (could take a while)\n"); for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) { struct hostent* phostent = gethostbyname(strDNSSeed[seed_idx]); if (!phostent) continue; for (int host = 0; phostent->h_addr_list[host] != NULL; host++) { CAddress addr(*(unsigned int*)phostent->h_addr_list[host], GetDefaultPort(), NODE_NETWORK); addr.nTime = 0; if (addr.IsValid() && addr.GetByte(3) != 127) { AddAddress(addr); found++; } } } printf("%d addresses found from DNS seeds\n", found); } unsigned int pnSeed[] = { 0x1ddb1032, 0x6242ce40, 0x52d6a445, 0x2dd7a445, 0x8a53cd47, 0x73263750, 0xda23c257, 0xecd4ed57, 0x0a40ec59, 0x75dce160, 0x7df76791, 0x89370bad, 0xa4f214ad, 0x767700ae, 0x638b0418, 0x868a1018, 0xcd9f332e, 0x0129653e, 0xcc92dc3e, 0x96671640, 0x56487e40, 0x5b66f440, 0xb1d01f41, 0xf1dc6041, 0xc1d12b42, 0x86ba1243, 0x6be4df43, 0x6d4cef43, 0xd18e0644, 0x1ab0b344, 0x6584a345, 0xe7c1a445, 0x58cea445, 0xc5daa445, 0x21dda445, 0x3d3b5346, 0x13e55347, 0x1080d24a, 0x8e611e4b, 0x81518e4b, 0x6c839e4b, 0xe2ad0a4c, 0xfbbc0a4c, 0x7f5b6e4c, 0x7244224e, 0x1300554e, 0x20690652, 0x5a48b652, 0x75c5c752, 0x4335cc54, 0x340fd154, 0x87c07455, 0x087b2b56, 0x8a133a57, 0xac23c257, 0x70374959, 0xfb63d45b, 0xb9a1685c, 0x180d765c, 0x674f645d, 0x04d3495e, 0x1de44b5e, 0x4ee8a362, 0x0ded1b63, 0xc1b04b6d, 0x8d921581, 0x97b7ea82, 0x1cf83a8e, 0x91490bad, 0x09dc75ae, 0x9a6d79ae, 0xa26d79ae, 0x0fd08fae, 0x0f3e3fb2, 0x4f944fb2, 0xcca448b8, 0x3ecd6ab8, 0xa9d5a5bc, 0x8d0119c1, 0x045997d5, 0xca019dd9, 0x0d526c4d, 0xabf1ba44, 0x66b1ab55, 0x1165f462, 0x3ed7cbad, 0xa38fae6e, 0x3bd2cbad, 0xd36f0547, 0x20df7840, 0x7a337742, 0x549f8e4b, 0x9062365c, 0xd399f562, 0x2b5274a1, 0x8edfa153, 0x3bffb347, 0x7074bf58, 0xb74fcbad, 0x5b5a795b, 0x02fa29ce, 0x5a6738d4, 0xe8a1d23e, 0xef98c445, 0x4b0f494c, 0xa2bc1e56, 0x7694ad63, 0xa4a800c3, 0x05fda6cd, 0x9f22175e, 0x364a795b, 0x536285d5, 0xac44c9d4, 0x0b06254d, 0x150c2fd4, 0x32a50dcc, 0xfd79ce48, 0xf15cfa53, 0x66c01e60, 0x6bc26661, 0xc03b47ae, 0x4dda1b81, 0x3285a4c1, 0x883ca96d, 0x35d60a4c, 0xdae09744, 0x2e314d61, 0x84e247cf, 0x6c814552, 0x3a1cc658, 0x98d8f382, 0xe584cb5b, 0x15e86057, 0x7b01504e, 0xd852dd48, 0x56382f56, 0x0a5df454, 0xa0d18d18, 0x2e89b148, 0xa79c114c, 0xcbdcd054, 0x5523bc43, 0xa9832640, 0x8a066144, 0x3894c3bc, 0xab76bf58, 0x6a018ac1, 0xfebf4f43, 0x2f26c658, 0x31102f4e, 0x85e929d5, 0x2a1c175e, 0xfc6c2cd1, 0x27b04b6d, 0xdf024650, 0x161748b8, 0x28be6580, 0x57be6580, 0x1cee677a, 0xaa6bb742, 0x9a53964b, 0x0a5a2d4d, 0x2434c658, 0x9a494f57, 0x1ebb0e48, 0xf610b85d, 0x077ecf44, 0x085128bc, 0x5ba17a18, 0x27ca1b42, 0xf8a00b56, 0xfcd4c257, 0xcf2fc15e, 0xd897e052, 0x4cada04f, 0x2f35f6d5, 0x382ce8c9, 0xe523984b, 0x3f946846, 0x60c8be43, 0x41da6257, 0xde0be142, 0xae8a544b, 0xeff0c254, 0x1e0f795b, 0xaeb28890, 0xca16acd9, 0x1e47ddd8, 0x8c8c4829, 0xd27dc747, 0xd53b1663, 0x4096b163, 0x9c8dd958, 0xcb12f860, 0x9e79305c, 0x40c1a445, 0x4a90c2bc, 0x2c3a464d, 0x2727f23c, 0x30b04b6d, 0x59024cb8, 0xa091e6ad, 0x31b04b6d, 0xc29d46a6, 0x63934fb2, 0xd9224dbe, 0x9f5910d8, 0x7f530a6b, 0x752e9c95, 0x65453548, 0xa484be46, 0xce5a1b59, 0x710e0718, 0x46a13d18, 0xdaaf5318, 0xc4a8ff53, 0x87abaa52, 0xb764cf51, 0xb2025d4a, 0x6d351e41, 0xc035c33e, 0xa432c162, 0x61ef34ae, 0xd16fddbc, 0x0870e8c1, 0x3070e8c1, 0x9c71e8c1, 0xa4992363, 0x85a1f663, 0x4184e559, 0x18d96ed8, 0x17b8dbd5, 0x60e7cd18, 0xe5ee104c, 0xab17ac62, 0x1e786e1b, 0x5d23b762, 0xf2388fae, 0x88270360, 0x9e5b3d80, 0x7da518b2, 0xb5613b45, 0x1ad41f3e, 0xd550854a, 0x8617e9a9, 0x925b229c, 0xf2e92542, 0x47af0544, 0x73b5a843, 0xb9b7a0ad, 0x03a748d0, 0x0a6ff862, 0x6694df62, 0x3bfac948, 0x8e098f4f, 0x746916c3, 0x02f38e4f, 0x40bb1243, 0x6a54d162, 0x6008414b, 0xa513794c, 0x514aa343, 0x63781747, 0xdbb6795b, 0xed065058, 0x42d24b46, 0x1518794c, 0x9b271681, 0x73e4ffad, 0x0654784f, 0x438dc945, 0x641846a6, 0x2d1b0944, 0x94b59148, 0x8d369558, 0xa5a97662, 0x8b705b42, 0xce9204ae, 0x8d584450, 0x2df61555, 0xeebff943, 0x2e75fb4d, 0x3ef8fc57, 0x9921135e, 0x8e31042e, 0xb5afad43, 0x89ecedd1, 0x9cfcc047, 0x8fcd0f4c, 0xbe49f5ad, 0x146a8d45, 0x98669ab8, 0x98d9175e, 0xd1a8e46d, 0x839a3ab8, 0x40a0016c, 0x6d27c257, 0x977fffad, 0x7baa5d5d, 0x1213be43, 0xb167e5a9, 0x640fe8ca, 0xbc9ea655, 0x0f820a4c, 0x0f097059, 0x69ac957c, 0x366d8453, 0xb1ba2844, 0x8857f081, 0x70b5be63, 0xc545454b, 0xaf36ded1, 0xb5a4b052, 0x21f062d1, 0x72ab89b2, 0x74a45318, 0x8312e6bc, 0xb916965f, 0x8aa7c858, 0xfe7effad, }; 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++) { foreach(string strAddr, mapMultiArgs["-connect"]) { CAddress addr(strAddr, NODE_NETWORK); 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")) { foreach(string strAddr, mapMultiArgs["-addnode"]) { CAddress addr(strAddr, NODE_NETWORK); if (addr.IsValid()) { OpenNetworkConnection(addr); Sleep(500); if (fShutdown) return; } } } // Initiate network connections int64 nStart = GetTime(); loop { // Limit outbound connections vnThreadsRunning[1]--; Sleep(500); loop { int nOutbound = 0; CRITICAL_BLOCK(cs_vNodes) foreach(CNode* pnode, vNodes) if (!pnode->fInbound) nOutbound++; int nMaxOutboundConnections = MAX_OUTBOUND_CONNECTIONS; nMaxOutboundConnections = min(nMaxOutboundConnections, (int)GetArg("-maxconnections", 125)); if (nOutbound < nMaxOutboundConnections) break; Sleep(2000); if (fShutdown) return; } vnThreadsRunning[1]++; if (fShutdown) return; CRITICAL_BLOCK(cs_mapAddresses) { // Add seed nodes if IRC isn't working static bool fSeedUsed; bool fTOR = (fUseProxy && addrProxy.port == htons(9050)); if (mapAddresses.empty() && (GetTime() - nStart > 60 || fTOR) && !fTestNet) { 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. CAddress addr; addr.ip = pnSeed[i]; addr.nTime = 0; AddAddress(addr); } fSeedUsed = true; } if (fSeedUsed && mapAddresses.size() > ARRAYLEN(pnSeed) + 100) { // Disconnect seed nodes set setSeed(pnSeed, pnSeed + ARRAYLEN(pnSeed)); static int64 nSeedDisconnected; if (nSeedDisconnected == 0) { nSeedDisconnected = GetTime(); CRITICAL_BLOCK(cs_vNodes) foreach(CNode* pnode, vNodes) if (setSeed.count(pnode->addr.ip)) pnode->fDisconnect = true; } // Keep setting timestamps to 0 so they won't reconnect if (GetTime() - nSeedDisconnected < 60 * 60) { foreach(PAIRTYPE(const vector, CAddress)& item, mapAddresses) { if (setSeed.count(item.second.ip) && item.second.nTime != 0) { item.second.nTime = 0; CAddrDB().WriteAddress(item.second); } } } } } // // 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) foreach(CNode* pnode, vNodes) setConnected.insert(pnode->addr.ip & 0x0000ffff); CRITICAL_BLOCK(cs_mapAddresses) { 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 = GetAdjustedTime() - addr.nTime; int64 nSinceLastTry = GetAdjustedTime() - 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 != 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)) 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; foreach(CNode* pnode, vNodesCopy) pnode->AddRef(); } // Poll the connected nodes for messages CNode* pnodeTrickle = NULL; if (!vNodesCopy.empty()) pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())]; 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) { 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 = GetDefaultPort(); #ifdef __WXMSW__ // 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 BSD // Different way of disabling SIGPIPE on BSD setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int)); #endif #ifndef __WXMSW__ // 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 __WXMSW__ // 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 = GetDefaultPort(); 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", nLocalServices)); #ifdef __WXMSW__ // Get local host ip char pszHostName[1000] = ""; if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR) { struct hostent* phostent = gethostbyname(pszHostName); if (phostent) { // Take the first IP that isn't loopback 127.x.x.x for (int i = 0; phostent->h_addr_list[i] != NULL; i++) printf("host ip %d: %s\n", i, CAddress(*(unsigned int*)phostent->h_addr_list[i]).ToStringIP().c_str()); for (int i = 0; phostent->h_addr_list[i] != NULL; i++) { CAddress addr(*(unsigned int*)phostent->h_addr_list[i], GetDefaultPort(), nLocalServices); if (addr.IsValid() && 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, GetDefaultPort(), 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 // // Get addresses from IRC and advertise ours if (!CreateThread(ThreadIRCSeed, NULL)) printf("Error: CreateThread(ThreadIRCSeed) failed\n"); // Send and receive from sockets, accept connections pthread_t hThreadSocketHandler = CreateThread(ThreadSocketHandler, NULL, true); // 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); } bool StopNode() { printf("StopNode()\n"); fShutdown = true; nTransactionsUpdated++; int64 nStart = GetTime(); while (vnThreadsRunning[0] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0) { 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"); while (vnThreadsRunning[2] > 0 || vnThreadsRunning[4] > 0) Sleep(20); Sleep(50); return true; } class CNetCleanup { public: CNetCleanup() { } ~CNetCleanup() { // Close sockets 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 __WXMSW__ // Shutdown Windows Sockets WSACleanup(); #endif } } instance_of_cnetcleanup;