// Copyright (c) 2009-2010 Satoshi Nakamoto // Copyright (c) 2009-2012 The Bitcoin developers // Distributed under the MIT/X11 software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. #include "irc.h" #include "db.h" #include "net.h" #include "init.h" #include "strlcpy.h" #include "addrman.h" #include "ui_interface.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); void ThreadOpenAddedConnections2(void* parg); #ifdef USE_UPNP void ThreadMapPort2(void* parg); #endif void ThreadDNSAddressSeed2(void* parg); bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOutbound = NULL, const char *strDest = NULL, bool fOneShot = false); struct LocalServiceInfo { int nScore; int nPort; }; // // Global state variables // bool fClient = false; bool fDiscover = true; bool fUseUPnP = false; uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK); static CCriticalSection cs_mapLocalHost; static map mapLocalHost; static bool vfReachable[NET_MAX] = {}; static bool vfLimited[NET_MAX] = {}; static CNode* pnodeLocalHost = NULL; uint64 nLocalHostNonce = 0; array vnThreadsRunning; static std::vector vhListenSocket; CAddrMan addrman; vector vNodes; CCriticalSection cs_vNodes; map mapRelay; deque > vRelayExpiration; CCriticalSection cs_mapRelay; map mapAlreadyAskedFor; static deque vOneShots; CCriticalSection cs_vOneShots; set setservAddNodeAddresses; CCriticalSection cs_setservAddNodeAddresses; static CSemaphore *semOutbound = NULL; void AddOneShot(string strDest) { LOCK(cs_vOneShots); vOneShots.push_back(strDest); } 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); } // find 'best' local address for a particular peer bool GetLocal(CService& addr, const CNetAddr *paddrPeer) { if (fNoListen) return false; int nBestScore = -1; int nBestReachability = -1; { LOCK(cs_mapLocalHost); for (map::iterator it = mapLocalHost.begin(); it != mapLocalHost.end(); it++) { int nScore = (*it).second.nScore; int nReachability = (*it).first.GetReachabilityFrom(paddrPeer); if (nReachability > nBestReachability || (nReachability == nBestReachability && nScore > nBestScore)) { addr = CService((*it).first, (*it).second.nPort); nBestReachability = nReachability; nBestScore = nScore; } } } return nBestScore >= 0; } // get best local address for a particular peer as a CAddress CAddress GetLocalAddress(const CNetAddr *paddrPeer) { CAddress ret(CService("0.0.0.0",0),0); CService addr; if (GetLocal(addr, paddrPeer)) { ret = CAddress(addr); ret.nServices = nLocalServices; ret.nTime = GetAdjustedTime(); } return ret; } bool RecvLine(SOCKET hSocket, string& strLine) { strLine = ""; loop { char c; int nBytes = recv(hSocket, &c, 1, 0); if (nBytes > 0) { if (c == '\n') continue; if (c == '\r') return true; strLine += c; if (strLine.size() >= 9000) return true; } else if (nBytes <= 0) { if (fShutdown) return false; if (nBytes < 0) { int nErr = WSAGetLastError(); if (nErr == WSAEMSGSIZE) continue; if (nErr == WSAEWOULDBLOCK || nErr == WSAEINTR || nErr == WSAEINPROGRESS) { Sleep(10); continue; } } if (!strLine.empty()) return true; if (nBytes == 0) { // socket closed printf("socket closed\n"); return false; } else { // socket error int nErr = WSAGetLastError(); printf("recv failed: %d\n", nErr); return false; } } } } // used when scores of local addresses may have changed // pushes better local address to peers void static AdvertizeLocal() { LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodes) { if (pnode->fSuccessfullyConnected) { CAddress addrLocal = GetLocalAddress(&pnode->addr); if (addrLocal.IsRoutable() && (CService)addrLocal != (CService)pnode->addrLocal) { pnode->PushAddress(addrLocal); pnode->addrLocal = addrLocal; } } } } void SetReachable(enum Network net, bool fFlag) { LOCK(cs_mapLocalHost); vfReachable[net] = fFlag; if (net == NET_IPV6 && fFlag) vfReachable[NET_IPV4] = true; } // learn a new local address bool AddLocal(const CService& addr, int nScore) { if (!addr.IsRoutable()) return false; if (!fDiscover && nScore < LOCAL_MANUAL) return false; if (IsLimited(addr)) return false; printf("AddLocal(%s,%i)\n", addr.ToString().c_str(), nScore); { LOCK(cs_mapLocalHost); bool fAlready = mapLocalHost.count(addr) > 0; LocalServiceInfo &info = mapLocalHost[addr]; if (!fAlready || nScore >= info.nScore) { info.nScore = nScore + (fAlready ? 1 : 0); info.nPort = addr.GetPort(); } SetReachable(addr.GetNetwork()); } AdvertizeLocal(); return true; } bool AddLocal(const CNetAddr &addr, int nScore) { return AddLocal(CService(addr, GetListenPort()), nScore); } /** Make a particular network entirely off-limits (no automatic connects to it) */ void SetLimited(enum Network net, bool fLimited) { if (net == NET_UNROUTABLE) return; LOCK(cs_mapLocalHost); vfLimited[net] = fLimited; } bool IsLimited(enum Network net) { LOCK(cs_mapLocalHost); return vfLimited[net]; } bool IsLimited(const CNetAddr &addr) { return IsLimited(addr.GetNetwork()); } /** vote for a local address */ bool SeenLocal(const CService& addr) { { LOCK(cs_mapLocalHost); if (mapLocalHost.count(addr) == 0) return false; mapLocalHost[addr].nScore++; } AdvertizeLocal(); return true; } /** check whether a given address is potentially local */ bool IsLocal(const CService& addr) { LOCK(cs_mapLocalHost); return mapLocalHost.count(addr) > 0; } /** check whether a given address is in a network we can probably connect to */ bool IsReachable(const CNetAddr& addr) { LOCK(cs_mapLocalHost); enum Network net = addr.GetNetwork(); return vfReachable[net] && !vfLimited[net]; } bool GetMyExternalIP2(const CService& addrConnect, const char* pszGet, const char* pszKeyword, CNetAddr& 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) != string::npos) { strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword)); break; } } closesocket(hSocket); if (strLine.find("<") != string::npos) 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); CService addr(strLine,0,true); printf("GetMyExternalIP() received [%s] %s\n", strLine.c_str(), addr.ToString().c_str()); if (!addr.IsValid() || !addr.IsRoutable()) return false; ipRet.SetIP(addr); 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(CNetAddr& ipRet) { CService addrConnect; const char* pszGet; const char* pszKeyword; 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 web server that prints the client IP: // if (nHost == 1) { addrConnect = CService("91.198.22.70",80); // checkip.dyndns.org if (nLookup == 1) { CService 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 = CService("74.208.43.192", 80); // www.showmyip.com if (nLookup == 1) { CService 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) { // Make this thread recognisable as the external IP detection thread RenameThread("bitcoin-ext-ip"); CNetAddr addrLocalHost; if (GetMyExternalIP(addrLocalHost)) { printf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP().c_str()); AddLocal(addrLocalHost, LOCAL_HTTP); } } void AddressCurrentlyConnected(const CService& addr) { addrman.Connected(addr); } CNode* FindNode(const CNetAddr& ip) { { LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodes) if ((CNetAddr)pnode->addr == ip) return (pnode); } return NULL; } CNode* FindNode(std::string addrName) { LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodes) if (pnode->addrName == addrName) return (pnode); return NULL; } CNode* FindNode(const CService& addr) { { LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodes) if ((CService)pnode->addr == addr) return (pnode); } return NULL; } CNode* ConnectNode(CAddress addrConnect, const char *pszDest, int64 nTimeout) { if (pszDest == NULL) { if (IsLocal(addrConnect)) return NULL; // Look for an existing connection CNode* pnode = FindNode((CService)addrConnect); if (pnode) { if (nTimeout != 0) pnode->AddRef(nTimeout); else pnode->AddRef(); return pnode; } } /// debug print printf("trying connection %s lastseen=%.1fhrs\n", pszDest ? pszDest : addrConnect.ToString().c_str(), pszDest ? 0 : (double)(GetAdjustedTime() - addrConnect.nTime)/3600.0); // Connect SOCKET hSocket; if (pszDest ? ConnectSocketByName(addrConnect, hSocket, pszDest, GetDefaultPort()) : ConnectSocket(addrConnect, hSocket)) { addrman.Attempt(addrConnect); /// debug print printf("connected %s\n", pszDest ? pszDest : addrConnect.ToString().c_str()); // Set to non-blocking #ifdef WIN32 u_long nOne = 1; if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR) printf("ConnectSocket() : ioctlsocket non-blocking setting failed, error %d\n", WSAGetLastError()); #else if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR) printf("ConnectSocket() : fcntl non-blocking setting failed, error %d\n", errno); #endif // Add node CNode* pnode = new CNode(hSocket, addrConnect, pszDest ? pszDest : "", false); if (nTimeout != 0) pnode->AddRef(nTimeout); else pnode->AddRef(); { LOCK(cs_vNodes); vNodes.push_back(pnode); } pnode->nTimeConnected = GetTime(); return pnode; } else { return NULL; } } void CNode::CloseSocketDisconnect() { fDisconnect = true; if (hSocket != INVALID_SOCKET) { printf("disconnecting node %s\n", addrName.c_str()); closesocket(hSocket); hSocket = INVALID_SOCKET; vRecv.clear(); } } void CNode::Cleanup() { } void CNode::PushVersion() { /// when NTP implemented, change to just nTime = GetAdjustedTime() int64 nTime = (fInbound ? GetAdjustedTime() : GetTime()); CAddress addrYou = (addr.IsRoutable() && !IsProxy(addr) ? addr : CAddress(CService("0.0.0.0",0))); CAddress addrMe = GetLocalAddress(&addr); RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce)); printf("send version message: version %d, blocks=%d, us=%s, them=%s, peer=%s\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString().c_str(), addrYou.ToString().c_str(), addr.ToString().c_str()); PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe, nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, std::vector()), nBestHeight); } std::map CNode::setBanned; CCriticalSection CNode::cs_setBanned; void CNode::ClearBanned() { setBanned.clear(); } bool CNode::IsBanned(CNetAddr ip) { bool fResult = false; { LOCK(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 (delta: %d)!\n", addrName.c_str(), howmuch); return false; } nMisbehavior += howmuch; if (nMisbehavior >= GetArg("-banscore", 100)) { int64 banTime = GetTime()+GetArg("-bantime", 60*60*24); // Default 24-hour ban printf("Misbehaving: %s (%d -> %d) DISCONNECTING\n", addr.ToString().c_str(), nMisbehavior-howmuch, nMisbehavior); { LOCK(cs_setBanned); if (setBanned[addr] < banTime) setBanned[addr] = banTime; } CloseSocketDisconnect(); return true; } else printf("Misbehaving: %s (%d -> %d)\n", addr.ToString().c_str(), nMisbehavior-howmuch, nMisbehavior); return false; } #undef X #define X(name) stats.name = name void CNode::copyStats(CNodeStats &stats) { X(nServices); X(nLastSend); X(nLastRecv); X(nTimeConnected); X(addrName); X(nVersion); X(strSubVer); X(fInbound); X(nReleaseTime); X(nStartingHeight); X(nMisbehavior); } #undef X void ThreadSocketHandler(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadSocketHandler(parg)); // Make this thread recognisable as the networking thread RenameThread("bitcoin-net"); try { vnThreadsRunning[THREAD_SOCKETHANDLER]++; ThreadSocketHandler2(parg); vnThreadsRunning[THREAD_SOCKETHANDLER]--; } catch (std::exception& e) { vnThreadsRunning[THREAD_SOCKETHANDLER]--; PrintException(&e, "ThreadSocketHandler()"); } catch (...) { vnThreadsRunning[THREAD_SOCKETHANDLER]--; throw; // support pthread_cancel() } printf("ThreadSocketHandler exited\n"); } void ThreadSocketHandler2(void* parg) { printf("ThreadSocketHandler started\n"); list vNodesDisconnected; unsigned int nPrevNodeCount = 0; loop { // // Disconnect nodes // { LOCK(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()); // release outbound grant (if any) pnode->grantOutbound.Release(); // 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_LOCK(pnode->cs_vSend, lockSend); if (lockSend) { TRY_LOCK(pnode->cs_vRecv, lockRecv); if (lockRecv) { TRY_LOCK(pnode->cs_mapRequests, lockReq); if (lockReq) { TRY_LOCK(pnode->cs_inventory, lockInv); if (lockInv) fDelete = true; } } } } if (fDelete) { vNodesDisconnected.remove(pnode); delete pnode; } } } } if (vNodes.size() != nPrevNodeCount) { nPrevNodeCount = vNodes.size(); uiInterface.NotifyNumConnectionsChanged(vNodes.size()); } // // 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; bool have_fds = false; BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket) { FD_SET(hListenSocket, &fdsetRecv); hSocketMax = max(hSocketMax, hListenSocket); have_fds = true; } { LOCK(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); have_fds = true; { TRY_LOCK(pnode->cs_vSend, lockSend); if (lockSend && !pnode->vSend.empty()) FD_SET(pnode->hSocket, &fdsetSend); } } } vnThreadsRunning[THREAD_SOCKETHANDLER]--; int nSelect = select(have_fds ? hSocketMax + 1 : 0, &fdsetRecv, &fdsetSend, &fdsetError, &timeout); vnThreadsRunning[THREAD_SOCKETHANDLER]++; if (fShutdown) return; if (nSelect == SOCKET_ERROR) { if (have_fds) { int nErr = WSAGetLastError(); printf("socket select error %d\n", nErr); for (unsigned int i = 0; i <= hSocketMax; i++) FD_SET(i, &fdsetRecv); } FD_ZERO(&fdsetSend); FD_ZERO(&fdsetError); Sleep(timeout.tv_usec/1000); } // // Accept new connections // BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket) if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv)) { #ifdef USE_IPV6 struct sockaddr_storage sockaddr; #else struct sockaddr sockaddr; #endif socklen_t len = sizeof(sockaddr); SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len); CAddress addr; int nInbound = 0; if (hSocket != INVALID_SOCKET) if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr)) printf("Warning: Unknown socket family\n"); { LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodes) if (pnode->fInbound) nInbound++; } if (hSocket == INVALID_SOCKET) { int nErr = WSAGetLastError(); if (nErr != WSAEWOULDBLOCK) printf("socket error accept failed: %d\n", nErr); } else if (nInbound >= GetArg("-maxconnections", 125) - MAX_OUTBOUND_CONNECTIONS) { { LOCK(cs_setservAddNodeAddresses); if (!setservAddNodeAddresses.count(addr)) closesocket(hSocket); } } else if (CNode::IsBanned(addr)) { printf("connection 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(); { LOCK(cs_vNodes); vNodes.push_back(pnode); } } } // // Service each socket // vector vNodesCopy; { LOCK(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_LOCK(pnode->cs_vRecv, lockRecv); if (lockRecv) { 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_LOCK(pnode->cs_vSend, lockSend); if (lockSend) { 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(); } } } } } // // 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; } } } { LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodesCopy) pnode->Release(); } Sleep(10); } } #ifdef USE_UPNP void ThreadMapPort(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadMapPort(parg)); // Make this thread recognisable as the UPnP thread RenameThread("bitcoin-UPnP"); try { vnThreadsRunning[THREAD_UPNP]++; ThreadMapPort2(parg); vnThreadsRunning[THREAD_UPNP]--; } catch (std::exception& e) { vnThreadsRunning[THREAD_UPNP]--; PrintException(&e, "ThreadMapPort()"); } catch (...) { vnThreadsRunning[THREAD_UPNP]--; PrintException(NULL, "ThreadMapPort()"); } printf("ThreadMapPort exited\n"); } void ThreadMapPort2(void* parg) { printf("ThreadMapPort started\n"); std::string port = strprintf("%u", 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 (fDiscover) { 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); AddLocal(CNetAddr(externalIPAddress), LOCAL_UPNP); } 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.c_str(), port.c_str(), lanaddr, strDesc.c_str(), "TCP", 0); #else /* miniupnpc 1.6 */ r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype, port.c_str(), port.c_str(), lanaddr, strDesc.c_str(), "TCP", 0, "0"); #endif if(r!=UPNPCOMMAND_SUCCESS) printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n", port.c_str(), port.c_str(), 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.c_str(), "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.c_str(), port.c_str(), lanaddr, strDesc.c_str(), "TCP", 0); #else /* miniupnpc 1.6 */ r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype, port.c_str(), port.c_str(), lanaddr, strDesc.c_str(), "TCP", 0, "0"); #endif if(r!=UPNPCOMMAND_SUCCESS) printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n", port.c_str(), port.c_str(), 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() { if (fUseUPnP && vnThreadsRunning[THREAD_UPNP] < 1) { if (!NewThread(ThreadMapPort, NULL)) printf("Error: ThreadMapPort(ThreadMapPort) failed\n"); } } #else void MapPort() { // Intentionally left blank. } #endif // DNS seeds // Each pair gives a source name and a seed name. // The first name is used as information source for addrman. // The second name should resolve to a list of seed addresses. static const char *strDNSSeed[][2] = { {"bitcoin.sipa.be", "seed.bitcoin.sipa.be"}, {"bluematt.me", "dnsseed.bluematt.me"}, {"dashjr.org", "dnsseed.bitcoin.dashjr.org"}, {"xf2.org", "bitseed.xf2.org"}, }; void ThreadDNSAddressSeed(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadDNSAddressSeed(parg)); // Make this thread recognisable as the DNS seeding thread RenameThread("bitcoin-dnsseed"); try { vnThreadsRunning[THREAD_DNSSEED]++; ThreadDNSAddressSeed2(parg); vnThreadsRunning[THREAD_DNSSEED]--; } catch (std::exception& e) { vnThreadsRunning[THREAD_DNSSEED]--; PrintException(&e, "ThreadDNSAddressSeed()"); } catch (...) { vnThreadsRunning[THREAD_DNSSEED]--; throw; // support pthread_cancel() } printf("ThreadDNSAddressSeed exited\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 (unsigned int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) { if (GetNameProxy()) { AddOneShot(strDNSSeed[seed_idx][1]); } else { vector vaddr; vector vAdd; if (LookupHost(strDNSSeed[seed_idx][1], vaddr)) { BOOST_FOREACH(CNetAddr& ip, vaddr) { int nOneDay = 24*3600; CAddress addr = CAddress(CService(ip, GetDefaultPort())); addr.nTime = GetTime() - 3*nOneDay - GetRand(4*nOneDay); // use a random age between 3 and 7 days old vAdd.push_back(addr); found++; } } addrman.Add(vAdd, CNetAddr(strDNSSeed[seed_idx][0], true)); } } } 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 DumpAddresses() { int64 nStart = GetTimeMillis(); CAddrDB adb; adb.Write(addrman); printf("Flushed %d addresses to peers.dat %"PRI64d"ms\n", addrman.size(), GetTimeMillis() - nStart); } void ThreadDumpAddress2(void* parg) { vnThreadsRunning[THREAD_DUMPADDRESS]++; while (!fShutdown) { DumpAddresses(); vnThreadsRunning[THREAD_DUMPADDRESS]--; Sleep(100000); vnThreadsRunning[THREAD_DUMPADDRESS]++; } vnThreadsRunning[THREAD_DUMPADDRESS]--; } void ThreadDumpAddress(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadDumpAddress(parg)); // Make this thread recognisable as the address dumping thread RenameThread("bitcoin-adrdump"); try { ThreadDumpAddress2(parg); } catch (std::exception& e) { PrintException(&e, "ThreadDumpAddress()"); } printf("ThreadDumpAddress exited\n"); } void ThreadOpenConnections(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadOpenConnections(parg)); // Make this thread recognisable as the connection opening thread RenameThread("bitcoin-opencon"); try { vnThreadsRunning[THREAD_OPENCONNECTIONS]++; ThreadOpenConnections2(parg); vnThreadsRunning[THREAD_OPENCONNECTIONS]--; } catch (std::exception& e) { vnThreadsRunning[THREAD_OPENCONNECTIONS]--; PrintException(&e, "ThreadOpenConnections()"); } catch (...) { vnThreadsRunning[THREAD_OPENCONNECTIONS]--; PrintException(NULL, "ThreadOpenConnections()"); } printf("ThreadOpenConnections exited\n"); } void static ProcessOneShot() { string strDest; { LOCK(cs_vOneShots); if (vOneShots.empty()) return; strDest = vOneShots.front(); vOneShots.pop_front(); } CAddress addr; CSemaphoreGrant grant(*semOutbound, true); if (grant) { if (!OpenNetworkConnection(addr, &grant, strDest.c_str(), true)) AddOneShot(strDest); } } void ThreadOpenConnections2(void* parg) { printf("ThreadOpenConnections started\n"); // Connect to specific addresses if (mapArgs.count("-connect") && mapMultiArgs["-connect"].size() > 0) { for (int64 nLoop = 0;; nLoop++) { ProcessOneShot(); BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"]) { CAddress addr; OpenNetworkConnection(addr, NULL, strAddr.c_str()); for (int i = 0; i < 10 && i < nLoop; i++) { Sleep(500); if (fShutdown) return; } } Sleep(500); } } // Initiate network connections int64 nStart = GetTime(); loop { ProcessOneShot(); vnThreadsRunning[THREAD_OPENCONNECTIONS]--; Sleep(500); vnThreadsRunning[THREAD_OPENCONNECTIONS]++; if (fShutdown) return; vnThreadsRunning[THREAD_OPENCONNECTIONS]--; CSemaphoreGrant grant(*semOutbound); vnThreadsRunning[THREAD_OPENCONNECTIONS]++; if (fShutdown) return; // Add seed nodes if IRC isn't working if (addrman.size()==0 && (GetTime() - nStart > 60) && !fTestNet) { std::vector vAdd; for (unsigned 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; struct in_addr ip; memcpy(&ip, &pnSeed[i], sizeof(ip)); CAddress addr(CService(ip, GetDefaultPort())); addr.nTime = GetTime()-GetRand(nOneWeek)-nOneWeek; vAdd.push_back(addr); } addrman.Add(vAdd, CNetAddr("127.0.0.1")); } // // Choose an address to connect to based on most recently seen // CAddress addrConnect; // Only connect out to one peer per network group (/16 for IPv4). // Do this here so we don't have to critsect vNodes inside mapAddresses critsect. int nOutbound = 0; set > setConnected; { LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodes) { if (!pnode->fInbound) { setConnected.insert(pnode->addr.GetGroup()); nOutbound++; } } } int64 nANow = GetAdjustedTime(); int nTries = 0; loop { // use an nUnkBias between 10 (no outgoing connections) and 90 (8 outgoing connections) CAddress addr = addrman.Select(10 + min(nOutbound,8)*10); // if we selected an invalid address, restart if (!addr.IsValid() || setConnected.count(addr.GetGroup()) || IsLocal(addr)) break; // If we didn't find an appropriate destination after trying 100 addresses fetched from addrman, // stop this loop, and let the outer loop run again (which sleeps, adds seed nodes, recalculates // already-connected network ranges, ...) before trying new addrman addresses. nTries++; if (nTries > 100) break; if (IsLimited(addr)) continue; // only consider very recently tried nodes after 30 failed attempts if (nANow - addr.nLastTry < 600 && nTries < 30) continue; // do not allow non-default ports, unless after 50 invalid addresses selected already if (addr.GetPort() != GetDefaultPort() && nTries < 50) continue; addrConnect = addr; break; } if (addrConnect.IsValid()) OpenNetworkConnection(addrConnect, &grant); } } void ThreadOpenAddedConnections(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadOpenAddedConnections(parg)); // Make this thread recognisable as the connection opening thread RenameThread("bitcoin-opencon"); try { vnThreadsRunning[THREAD_ADDEDCONNECTIONS]++; ThreadOpenAddedConnections2(parg); vnThreadsRunning[THREAD_ADDEDCONNECTIONS]--; } catch (std::exception& e) { vnThreadsRunning[THREAD_ADDEDCONNECTIONS]--; PrintException(&e, "ThreadOpenAddedConnections()"); } catch (...) { vnThreadsRunning[THREAD_ADDEDCONNECTIONS]--; PrintException(NULL, "ThreadOpenAddedConnections()"); } printf("ThreadOpenAddedConnections exited\n"); } void ThreadOpenAddedConnections2(void* parg) { printf("ThreadOpenAddedConnections started\n"); if (mapArgs.count("-addnode") == 0) return; if (GetNameProxy()) { while(!fShutdown) { BOOST_FOREACH(string& strAddNode, mapMultiArgs["-addnode"]) { CAddress addr; CSemaphoreGrant grant(*semOutbound); OpenNetworkConnection(addr, &grant, strAddNode.c_str()); Sleep(500); } vnThreadsRunning[THREAD_ADDEDCONNECTIONS]--; Sleep(120000); // Retry every 2 minutes vnThreadsRunning[THREAD_ADDEDCONNECTIONS]++; } return; } vector > vservAddressesToAdd(0); BOOST_FOREACH(string& strAddNode, mapMultiArgs["-addnode"]) { vector vservNode(0); if(Lookup(strAddNode.c_str(), vservNode, GetDefaultPort(), fNameLookup, 0)) { vservAddressesToAdd.push_back(vservNode); { LOCK(cs_setservAddNodeAddresses); BOOST_FOREACH(CService& serv, vservNode) setservAddNodeAddresses.insert(serv); } } } loop { vector > vservConnectAddresses = vservAddressesToAdd; // Attempt to connect to each IP for each addnode entry until at least one is successful per addnode entry // (keeping in mind that addnode entries can have many IPs if fNameLookup) { LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodes) for (vector >::iterator it = vservConnectAddresses.begin(); it != vservConnectAddresses.end(); it++) BOOST_FOREACH(CService& addrNode, *(it)) if (pnode->addr == addrNode) { it = vservConnectAddresses.erase(it); it--; break; } } BOOST_FOREACH(vector& vserv, vservConnectAddresses) { CSemaphoreGrant grant(*semOutbound); OpenNetworkConnection(CAddress(*(vserv.begin())), &grant); Sleep(500); if (fShutdown) return; } if (fShutdown) return; vnThreadsRunning[THREAD_ADDEDCONNECTIONS]--; Sleep(120000); // Retry every 2 minutes vnThreadsRunning[THREAD_ADDEDCONNECTIONS]++; if (fShutdown) return; } } // if successful, this moves the passed grant to the constructed node bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOutbound, const char *strDest, bool fOneShot) { // // Initiate outbound network connection // if (fShutdown) return false; if (!strDest) if (IsLocal(addrConnect) || FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect) || FindNode(addrConnect.ToStringIPPort().c_str())) return false; if (strDest && FindNode(strDest)) return false; vnThreadsRunning[THREAD_OPENCONNECTIONS]--; CNode* pnode = ConnectNode(addrConnect, strDest); vnThreadsRunning[THREAD_OPENCONNECTIONS]++; if (fShutdown) return false; if (!pnode) return false; if (grantOutbound) grantOutbound->MoveTo(pnode->grantOutbound); pnode->fNetworkNode = true; if (fOneShot) pnode->fOneShot = true; return true; } void ThreadMessageHandler(void* parg) { IMPLEMENT_RANDOMIZE_STACK(ThreadMessageHandler(parg)); // Make this thread recognisable as the message handling thread RenameThread("bitcoin-msghand"); try { vnThreadsRunning[THREAD_MESSAGEHANDLER]++; ThreadMessageHandler2(parg); vnThreadsRunning[THREAD_MESSAGEHANDLER]--; } catch (std::exception& e) { vnThreadsRunning[THREAD_MESSAGEHANDLER]--; PrintException(&e, "ThreadMessageHandler()"); } catch (...) { vnThreadsRunning[THREAD_MESSAGEHANDLER]--; PrintException(NULL, "ThreadMessageHandler()"); } printf("ThreadMessageHandler exited\n"); } void ThreadMessageHandler2(void* parg) { printf("ThreadMessageHandler started\n"); SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL); while (!fShutdown) { vector vNodesCopy; { LOCK(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_LOCK(pnode->cs_vRecv, lockRecv); if (lockRecv) ProcessMessages(pnode); } if (fShutdown) return; // Send messages { TRY_LOCK(pnode->cs_vSend, lockSend); if (lockSend) SendMessages(pnode, pnode == pnodeTrickle); } if (fShutdown) return; } { LOCK(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[THREAD_MESSAGEHANDLER]--; Sleep(100); if (fRequestShutdown) StartShutdown(); vnThreadsRunning[THREAD_MESSAGEHANDLER]++; if (fShutdown) return; } } bool BindListenPort(const CService &addrBind, string& strError) { strError = ""; int nOne = 1; #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 #ifdef USE_IPV6 struct sockaddr_storage sockaddr; #else struct sockaddr sockaddr; #endif socklen_t len = sizeof(sockaddr); if (!addrBind.GetSockAddr((struct sockaddr*)&sockaddr, &len)) { strError = strprintf("Error: bind address family for %s not supported", addrBind.ToString().c_str()); printf("%s\n", strError.c_str()); return false; } SOCKET hListenSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, 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 non-blocking, 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; } #ifdef USE_IPV6 // some systems don't have IPV6_V6ONLY but are always v6only; others do have the option // and enable it by default or not. Try to enable it, if possible. if (addrBind.IsIPv6()) { #ifdef IPV6_V6ONLY setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&nOne, sizeof(int)); #endif #ifdef WIN32 int nProtLevel = 10 /* PROTECTION_LEVEL_UNRESTRICTED */; int nParameterId = 23 /* IPV6_PROTECTION_LEVEl */; // this call is allowed to fail setsockopt(hListenSocket, IPPROTO_IPV6, nParameterId, (const char*)&nProtLevel, sizeof(int)); #endif } #endif if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR) { int nErr = WSAGetLastError(); if (nErr == WSAEADDRINUSE) strError = strprintf(_("Unable to bind to %s on this computer. Bitcoin is probably already running."), addrBind.ToString().c_str()); else strError = strprintf(_("Unable to bind to %s on this computer (bind returned error %d, %s)"), addrBind.ToString().c_str(), nErr, strerror(nErr)); printf("%s\n", strError.c_str()); return false; } printf("Bound to %s\n", addrBind.ToString().c_str()); // 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; } vhListenSocket.push_back(hListenSocket); if (addrBind.IsRoutable() && fDiscover) AddLocal(addrBind, LOCAL_BIND); return true; } void static Discover() { if (!fDiscover) return; #ifdef WIN32 // Get local host IP char pszHostName[1000] = ""; if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR) { vector vaddr; if (LookupHost(pszHostName, vaddr)) { BOOST_FOREACH (const CNetAddr &addr, vaddr) { AddLocal(addr, LOCAL_IF); } } } #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; if (ifa->ifa_addr->sa_family == AF_INET) { struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr); CNetAddr addr(s4->sin_addr); if (AddLocal(addr, LOCAL_IF)) printf("IPv4 %s: %s\n", ifa->ifa_name, addr.ToString().c_str()); } #ifdef USE_IPV6 else if (ifa->ifa_addr->sa_family == AF_INET6) { struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr); CNetAddr addr(s6->sin6_addr); if (AddLocal(addr, LOCAL_IF)) printf("IPv6 %s: %s\n", ifa->ifa_name, addr.ToString().c_str()); } #endif } freeifaddrs(myaddrs); } #endif // Don't use external IPv4 discovery, when -onlynet="IPv6" if (!IsLimited(NET_IPV4)) NewThread(ThreadGetMyExternalIP, NULL); } void StartNode(void* parg) { // Make this thread recognisable as the startup thread RenameThread("bitcoin-start"); if (semOutbound == NULL) { // initialize semaphore int nMaxOutbound = min(MAX_OUTBOUND_CONNECTIONS, (int)GetArg("-maxconnections", 125)); semOutbound = new CSemaphore(nMaxOutbound); } if (pnodeLocalHost == NULL) pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress(CService("127.0.0.1", 0), nLocalServices)); Discover(); // // Start threads // if (!GetBoolArg("-dnsseed", true)) printf("DNS seeding disabled\n"); else if (!NewThread(ThreadDNSAddressSeed, NULL)) printf("Error: NewThread(ThreadDNSAddressSeed) failed\n"); // Map ports with UPnP if (fUseUPnP) MapPort(); // Get addresses from IRC and advertise ours if (!NewThread(ThreadIRCSeed, NULL)) printf("Error: NewThread(ThreadIRCSeed) failed\n"); // Send and receive from sockets, accept connections if (!NewThread(ThreadSocketHandler, NULL)) printf("Error: NewThread(ThreadSocketHandler) failed\n"); // Initiate outbound connections from -addnode if (!NewThread(ThreadOpenAddedConnections, NULL)) printf("Error: NewThread(ThreadOpenAddedConnections) failed\n"); // Initiate outbound connections if (!NewThread(ThreadOpenConnections, NULL)) printf("Error: NewThread(ThreadOpenConnections) failed\n"); // Process messages if (!NewThread(ThreadMessageHandler, NULL)) printf("Error: NewThread(ThreadMessageHandler) failed\n"); // Dump network addresses if (!NewThread(ThreadDumpAddress, NULL)) printf("Error; NewThread(ThreadDumpAddress) failed\n"); // Generate coins in the background GenerateBitcoins(GetBoolArg("-gen", false), pwalletMain); } bool StopNode() { printf("StopNode()\n"); fShutdown = true; nTransactionsUpdated++; int64 nStart = GetTime(); if (semOutbound) for (int i=0; ipost(); do { int nThreadsRunning = 0; for (int n = 0; n < THREAD_MAX; n++) nThreadsRunning += vnThreadsRunning[n]; if (nThreadsRunning == 0) break; if (GetTime() - nStart > 20) break; Sleep(20); } while(true); if (vnThreadsRunning[THREAD_SOCKETHANDLER] > 0) printf("ThreadSocketHandler still running\n"); if (vnThreadsRunning[THREAD_OPENCONNECTIONS] > 0) printf("ThreadOpenConnections still running\n"); if (vnThreadsRunning[THREAD_MESSAGEHANDLER] > 0) printf("ThreadMessageHandler still running\n"); if (vnThreadsRunning[THREAD_MINER] > 0) printf("ThreadBitcoinMiner still running\n"); if (vnThreadsRunning[THREAD_RPCLISTENER] > 0) printf("ThreadRPCListener still running\n"); if (vnThreadsRunning[THREAD_RPCHANDLER] > 0) printf("ThreadsRPCServer still running\n"); #ifdef USE_UPNP if (vnThreadsRunning[THREAD_UPNP] > 0) printf("ThreadMapPort still running\n"); #endif if (vnThreadsRunning[THREAD_DNSSEED] > 0) printf("ThreadDNSAddressSeed still running\n"); if (vnThreadsRunning[THREAD_ADDEDCONNECTIONS] > 0) printf("ThreadOpenAddedConnections still running\n"); if (vnThreadsRunning[THREAD_DUMPADDRESS] > 0) printf("ThreadDumpAddresses still running\n"); while (vnThreadsRunning[THREAD_MESSAGEHANDLER] > 0 || vnThreadsRunning[THREAD_RPCHANDLER] > 0) Sleep(20); Sleep(50); DumpAddresses(); return true; } class CNetCleanup { public: CNetCleanup() { } ~CNetCleanup() { // Close sockets BOOST_FOREACH(CNode* pnode, vNodes) if (pnode->hSocket != INVALID_SOCKET) closesocket(pnode->hSocket); BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket) 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;