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2040 lines
61 KiB
2040 lines
61 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto |
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// Copyright (c) 2009-2014 The Bitcoin developers |
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// Distributed under the MIT/X11 software license, see the accompanying |
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// file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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#if defined(HAVE_CONFIG_H) |
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#include "config/bitcoin-config.h" |
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#endif |
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#include "net.h" |
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|
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#include "addrman.h" |
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#include "chainparams.h" |
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#include "core.h" |
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#include "ui_interface.h" |
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|
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#ifdef WIN32 |
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#include <string.h> |
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#else |
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#include <fcntl.h> |
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#endif |
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#ifdef USE_UPNP |
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#include <miniupnpc/miniupnpc.h> |
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#include <miniupnpc/miniwget.h> |
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#include <miniupnpc/upnpcommands.h> |
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#include <miniupnpc/upnperrors.h> |
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#endif |
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#include <boost/filesystem.hpp> |
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// Dump addresses to peers.dat every 15 minutes (900s) |
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#define DUMP_ADDRESSES_INTERVAL 900 |
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|
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#if !defined(HAVE_MSG_NOSIGNAL) && !defined(MSG_NOSIGNAL) |
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#define MSG_NOSIGNAL 0 |
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#endif |
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// Fix for ancient MinGW versions, that don't have defined these in ws2tcpip.h. |
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// Todo: Can be removed when our pull-tester is upgraded to a modern MinGW version. |
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#ifdef WIN32 |
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#ifndef PROTECTION_LEVEL_UNRESTRICTED |
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#define PROTECTION_LEVEL_UNRESTRICTED 10 |
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#endif |
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#ifndef IPV6_PROTECTION_LEVEL |
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#define IPV6_PROTECTION_LEVEL 23 |
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#endif |
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#endif |
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using namespace std; |
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using namespace boost; |
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namespace { |
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const int MAX_OUTBOUND_CONNECTIONS = 8; |
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struct ListenSocket { |
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SOCKET socket; |
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bool whitelisted; |
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ListenSocket(SOCKET socket, bool whitelisted) : socket(socket), whitelisted(whitelisted) {} |
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}; |
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} |
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// |
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// Global state variables |
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// |
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bool fDiscover = true; |
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bool fListen = true; |
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uint64_t nLocalServices = NODE_NETWORK; |
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CCriticalSection cs_mapLocalHost; |
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map<CNetAddr, LocalServiceInfo> mapLocalHost; |
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static bool vfReachable[NET_MAX] = {}; |
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static bool vfLimited[NET_MAX] = {}; |
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static CNode* pnodeLocalHost = NULL; |
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static CNode* pnodeSync = NULL; |
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uint64_t nLocalHostNonce = 0; |
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static std::vector<ListenSocket> vhListenSocket; |
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CAddrMan addrman; |
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int nMaxConnections = 125; |
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vector<CNode*> vNodes; |
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CCriticalSection cs_vNodes; |
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map<CInv, CDataStream> mapRelay; |
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deque<pair<int64_t, CInv> > vRelayExpiration; |
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CCriticalSection cs_mapRelay; |
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limitedmap<CInv, int64_t> mapAlreadyAskedFor(MAX_INV_SZ); |
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static deque<string> vOneShots; |
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CCriticalSection cs_vOneShots; |
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set<CNetAddr> setservAddNodeAddresses; |
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CCriticalSection cs_setservAddNodeAddresses; |
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vector<std::string> vAddedNodes; |
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CCriticalSection cs_vAddedNodes; |
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NodeId nLastNodeId = 0; |
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CCriticalSection cs_nLastNodeId; |
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static CSemaphore *semOutbound = NULL; |
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// Signals for message handling |
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static CNodeSignals g_signals; |
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CNodeSignals& GetNodeSignals() { return g_signals; } |
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void AddOneShot(string strDest) |
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{ |
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LOCK(cs_vOneShots); |
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vOneShots.push_back(strDest); |
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} |
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unsigned short GetListenPort() |
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{ |
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return (unsigned short)(GetArg("-port", Params().GetDefaultPort())); |
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} |
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// find 'best' local address for a particular peer |
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bool GetLocal(CService& addr, const CNetAddr *paddrPeer) |
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{ |
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if (!fListen) |
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return false; |
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int nBestScore = -1; |
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int nBestReachability = -1; |
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{ |
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LOCK(cs_mapLocalHost); |
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for (map<CNetAddr, LocalServiceInfo>::iterator it = mapLocalHost.begin(); it != mapLocalHost.end(); it++) |
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{ |
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int nScore = (*it).second.nScore; |
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int nReachability = (*it).first.GetReachabilityFrom(paddrPeer); |
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if (nReachability > nBestReachability || (nReachability == nBestReachability && nScore > nBestScore)) |
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{ |
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addr = CService((*it).first, (*it).second.nPort); |
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nBestReachability = nReachability; |
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nBestScore = nScore; |
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} |
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} |
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} |
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return nBestScore >= 0; |
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} |
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// get best local address for a particular peer as a CAddress |
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CAddress GetLocalAddress(const CNetAddr *paddrPeer) |
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{ |
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CAddress ret(CService("0.0.0.0",0),0); |
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CService addr; |
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if (GetLocal(addr, paddrPeer)) |
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{ |
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ret = CAddress(addr); |
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ret.nServices = nLocalServices; |
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ret.nTime = GetAdjustedTime(); |
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} |
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return ret; |
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} |
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bool RecvLine(SOCKET hSocket, string& strLine) |
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{ |
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strLine = ""; |
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while (true) |
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{ |
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char c; |
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int nBytes = recv(hSocket, &c, 1, 0); |
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if (nBytes > 0) |
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{ |
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if (c == '\n') |
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continue; |
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if (c == '\r') |
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return true; |
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strLine += c; |
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if (strLine.size() >= 9000) |
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return true; |
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} |
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else if (nBytes <= 0) |
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{ |
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boost::this_thread::interruption_point(); |
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if (nBytes < 0) |
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{ |
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int nErr = WSAGetLastError(); |
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if (nErr == WSAEMSGSIZE) |
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continue; |
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if (nErr == WSAEWOULDBLOCK || nErr == WSAEINTR || nErr == WSAEINPROGRESS) |
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{ |
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MilliSleep(10); |
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continue; |
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} |
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} |
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if (!strLine.empty()) |
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return true; |
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if (nBytes == 0) |
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{ |
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// socket closed |
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LogPrint("net", "socket closed\n"); |
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return false; |
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} |
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else |
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{ |
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// socket error |
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int nErr = WSAGetLastError(); |
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LogPrint("net", "recv failed: %s\n", NetworkErrorString(nErr)); |
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return false; |
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} |
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} |
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} |
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} |
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// used when scores of local addresses may have changed |
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// pushes better local address to peers |
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void static AdvertizeLocal() |
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{ |
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LOCK(cs_vNodes); |
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BOOST_FOREACH(CNode* pnode, vNodes) |
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{ |
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if (pnode->fSuccessfullyConnected) |
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{ |
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CAddress addrLocal = GetLocalAddress(&pnode->addr); |
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if (addrLocal.IsRoutable() && (CService)addrLocal != (CService)pnode->addrLocal) |
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{ |
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pnode->PushAddress(addrLocal); |
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pnode->addrLocal = addrLocal; |
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} |
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} |
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} |
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} |
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void SetReachable(enum Network net, bool fFlag) |
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{ |
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LOCK(cs_mapLocalHost); |
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vfReachable[net] = fFlag; |
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if (net == NET_IPV6 && fFlag) |
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vfReachable[NET_IPV4] = true; |
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} |
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// learn a new local address |
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bool AddLocal(const CService& addr, int nScore) |
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{ |
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if (!addr.IsRoutable()) |
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return false; |
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if (!fDiscover && nScore < LOCAL_MANUAL) |
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return false; |
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if (IsLimited(addr)) |
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return false; |
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LogPrintf("AddLocal(%s,%i)\n", addr.ToString(), nScore); |
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{ |
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LOCK(cs_mapLocalHost); |
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bool fAlready = mapLocalHost.count(addr) > 0; |
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LocalServiceInfo &info = mapLocalHost[addr]; |
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if (!fAlready || nScore >= info.nScore) { |
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info.nScore = nScore + (fAlready ? 1 : 0); |
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info.nPort = addr.GetPort(); |
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} |
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SetReachable(addr.GetNetwork()); |
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} |
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AdvertizeLocal(); |
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return true; |
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} |
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bool AddLocal(const CNetAddr &addr, int nScore) |
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{ |
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return AddLocal(CService(addr, GetListenPort()), nScore); |
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} |
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/** Make a particular network entirely off-limits (no automatic connects to it) */ |
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void SetLimited(enum Network net, bool fLimited) |
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{ |
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if (net == NET_UNROUTABLE) |
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return; |
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LOCK(cs_mapLocalHost); |
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vfLimited[net] = fLimited; |
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} |
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bool IsLimited(enum Network net) |
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{ |
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LOCK(cs_mapLocalHost); |
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return vfLimited[net]; |
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} |
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bool IsLimited(const CNetAddr &addr) |
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{ |
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return IsLimited(addr.GetNetwork()); |
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} |
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/** vote for a local address */ |
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bool SeenLocal(const CService& addr) |
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{ |
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{ |
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LOCK(cs_mapLocalHost); |
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if (mapLocalHost.count(addr) == 0) |
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return false; |
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mapLocalHost[addr].nScore++; |
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} |
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AdvertizeLocal(); |
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return true; |
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} |
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/** check whether a given address is potentially local */ |
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bool IsLocal(const CService& addr) |
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{ |
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LOCK(cs_mapLocalHost); |
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return mapLocalHost.count(addr) > 0; |
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} |
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/** check whether a given address is in a network we can probably connect to */ |
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bool IsReachable(const CNetAddr& addr) |
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{ |
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LOCK(cs_mapLocalHost); |
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enum Network net = addr.GetNetwork(); |
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return vfReachable[net] && !vfLimited[net]; |
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} |
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bool GetMyExternalIP2(const CService& addrConnect, const char* pszGet, const char* pszKeyword, CNetAddr& ipRet) |
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{ |
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SOCKET hSocket; |
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if (!ConnectSocket(addrConnect, hSocket)) |
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return error("GetMyExternalIP() : connection to %s failed", addrConnect.ToString()); |
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send(hSocket, pszGet, strlen(pszGet), MSG_NOSIGNAL); |
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string strLine; |
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while (RecvLine(hSocket, strLine)) |
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{ |
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if (strLine.empty()) // HTTP response is separated from headers by blank line |
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{ |
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while (true) |
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{ |
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if (!RecvLine(hSocket, strLine)) |
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{ |
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CloseSocket(hSocket); |
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return false; |
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} |
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if (pszKeyword == NULL) |
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break; |
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if (strLine.find(pszKeyword) != string::npos) |
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{ |
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strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword)); |
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break; |
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} |
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} |
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CloseSocket(hSocket); |
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if (strLine.find("<") != string::npos) |
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strLine = strLine.substr(0, strLine.find("<")); |
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strLine = strLine.substr(strspn(strLine.c_str(), " \t\n\r")); |
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while (strLine.size() > 0 && isspace(strLine[strLine.size()-1])) |
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strLine.resize(strLine.size()-1); |
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CService addr(strLine,0,true); |
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LogPrintf("GetMyExternalIP() received [%s] %s\n", strLine, addr.ToString()); |
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if (!addr.IsValid() || !addr.IsRoutable()) |
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return false; |
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ipRet.SetIP(addr); |
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return true; |
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} |
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} |
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CloseSocket(hSocket); |
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return error("GetMyExternalIP() : connection closed"); |
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} |
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bool GetMyExternalIP(CNetAddr& ipRet) |
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{ |
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CService addrConnect; |
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const char* pszGet; |
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const char* pszKeyword; |
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for (int nLookup = 0; nLookup <= 1; nLookup++) |
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for (int nHost = 1; nHost <= 2; nHost++) |
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{ |
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// We should be phasing out our use of sites like these. If we need |
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// replacements, we should ask for volunteers to put this simple |
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// php file on their web server that prints the client IP: |
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// <?php echo $_SERVER["REMOTE_ADDR"]; ?> |
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if (nHost == 1) |
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{ |
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addrConnect = CService("91.198.22.70", 80); // checkip.dyndns.org |
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if (nLookup == 1) |
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{ |
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CService addrIP("checkip.dyndns.org", 80, true); |
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if (addrIP.IsValid()) |
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addrConnect = addrIP; |
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} |
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pszGet = "GET / HTTP/1.1\r\n" |
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"Host: checkip.dyndns.org\r\n" |
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"User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n" |
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"Connection: close\r\n" |
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"\r\n"; |
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pszKeyword = "Address:"; |
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} |
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else if (nHost == 2) |
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{ |
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addrConnect = CService("74.208.43.192", 80); // www.showmyip.com |
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if (nLookup == 1) |
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{ |
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CService addrIP("www.showmyip.com", 80, true); |
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if (addrIP.IsValid()) |
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addrConnect = addrIP; |
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} |
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pszGet = "GET /simple/ HTTP/1.1\r\n" |
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"Host: www.showmyip.com\r\n" |
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"User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n" |
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"Connection: close\r\n" |
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"\r\n"; |
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pszKeyword = NULL; // Returns just IP address |
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} |
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if (GetMyExternalIP2(addrConnect, pszGet, pszKeyword, ipRet)) |
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return true; |
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} |
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return false; |
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} |
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void ThreadGetMyExternalIP() |
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{ |
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CNetAddr addrLocalHost; |
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if (GetMyExternalIP(addrLocalHost)) |
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{ |
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LogPrintf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP()); |
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AddLocal(addrLocalHost, LOCAL_HTTP); |
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} |
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} |
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void AddressCurrentlyConnected(const CService& addr) |
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{ |
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addrman.Connected(addr); |
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} |
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uint64_t CNode::nTotalBytesRecv = 0; |
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uint64_t CNode::nTotalBytesSent = 0; |
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CCriticalSection CNode::cs_totalBytesRecv; |
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CCriticalSection CNode::cs_totalBytesSent; |
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CNode* FindNode(const CNetAddr& ip) |
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{ |
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LOCK(cs_vNodes); |
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BOOST_FOREACH(CNode* pnode, vNodes) |
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if ((CNetAddr)pnode->addr == ip) |
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return (pnode); |
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return NULL; |
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} |
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CNode* FindNode(const std::string& addrName) |
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{ |
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LOCK(cs_vNodes); |
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BOOST_FOREACH(CNode* pnode, vNodes) |
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if (pnode->addrName == addrName) |
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return (pnode); |
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return NULL; |
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} |
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CNode* FindNode(const CService& addr) |
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{ |
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LOCK(cs_vNodes); |
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BOOST_FOREACH(CNode* pnode, vNodes) |
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if ((CService)pnode->addr == addr) |
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return (pnode); |
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return NULL; |
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} |
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CNode* ConnectNode(CAddress addrConnect, const char *pszDest) |
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{ |
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if (pszDest == NULL) { |
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if (IsLocal(addrConnect)) |
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return NULL; |
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// Look for an existing connection |
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CNode* pnode = FindNode((CService)addrConnect); |
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if (pnode) |
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{ |
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pnode->AddRef(); |
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return pnode; |
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} |
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} |
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/// debug print |
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LogPrint("net", "trying connection %s lastseen=%.1fhrs\n", |
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pszDest ? pszDest : addrConnect.ToString(), |
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pszDest ? 0.0 : (double)(GetAdjustedTime() - addrConnect.nTime)/3600.0); |
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// Connect |
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SOCKET hSocket; |
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if (pszDest ? ConnectSocketByName(addrConnect, hSocket, pszDest, Params().GetDefaultPort()) : ConnectSocket(addrConnect, hSocket)) |
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{ |
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addrman.Attempt(addrConnect); |
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|
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// Set to non-blocking |
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if (!SetSocketNonBlocking(hSocket, true)) |
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LogPrintf("ConnectNode: Setting socket to non-blocking failed, error %s\n", NetworkErrorString(WSAGetLastError())); |
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// Add node |
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CNode* pnode = new CNode(hSocket, addrConnect, pszDest ? pszDest : "", false); |
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pnode->AddRef(); |
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|
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{ |
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LOCK(cs_vNodes); |
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vNodes.push_back(pnode); |
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} |
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pnode->nTimeConnected = GetTime(); |
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return pnode; |
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} |
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return NULL; |
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} |
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void CNode::CloseSocketDisconnect() |
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{ |
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fDisconnect = true; |
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if (hSocket != INVALID_SOCKET) |
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{ |
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LogPrint("net", "disconnecting peer=%d\n", id); |
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CloseSocket(hSocket); |
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} |
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|
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// in case this fails, we'll empty the recv buffer when the CNode is deleted |
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TRY_LOCK(cs_vRecvMsg, lockRecv); |
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if (lockRecv) |
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vRecvMsg.clear(); |
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|
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// if this was the sync node, we'll need a new one |
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if (this == pnodeSync) |
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pnodeSync = NULL; |
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} |
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|
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void CNode::PushVersion() |
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{ |
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int nBestHeight = g_signals.GetHeight().get_value_or(0); |
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|
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/// when NTP implemented, change to just nTime = GetAdjustedTime() |
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int64_t nTime = (fInbound ? GetAdjustedTime() : GetTime()); |
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CAddress addrYou = (addr.IsRoutable() && !IsProxy(addr) ? addr : CAddress(CService("0.0.0.0",0))); |
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CAddress addrMe = GetLocalAddress(&addr); |
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GetRandBytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce)); |
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if (fLogIPs) |
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LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), addrYou.ToString(), id); |
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else |
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LogPrint("net", "send version message: version %d, blocks=%d, us=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), id); |
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PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe, |
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nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, std::vector<string>()), nBestHeight, true); |
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} |
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std::map<CNetAddr, int64_t> CNode::setBanned; |
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CCriticalSection CNode::cs_setBanned; |
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|
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void CNode::ClearBanned() |
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{ |
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setBanned.clear(); |
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} |
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|
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bool CNode::IsBanned(CNetAddr ip) |
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{ |
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bool fResult = false; |
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{ |
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LOCK(cs_setBanned); |
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std::map<CNetAddr, int64_t>::iterator i = setBanned.find(ip); |
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if (i != setBanned.end()) |
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{ |
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int64_t t = (*i).second; |
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if (GetTime() < t) |
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fResult = true; |
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} |
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} |
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return fResult; |
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} |
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|
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bool CNode::Ban(const CNetAddr &addr) { |
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int64_t banTime = GetTime()+GetArg("-bantime", 60*60*24); // Default 24-hour ban |
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{ |
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LOCK(cs_setBanned); |
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if (setBanned[addr] < banTime) |
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setBanned[addr] = banTime; |
|
} |
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return true; |
|
} |
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|
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|
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std::vector<CSubNet> CNode::vWhitelistedRange; |
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CCriticalSection CNode::cs_vWhitelistedRange; |
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|
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bool CNode::IsWhitelistedRange(const CNetAddr &addr) { |
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LOCK(cs_vWhitelistedRange); |
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BOOST_FOREACH(const CSubNet& subnet, vWhitelistedRange) { |
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if (subnet.Match(addr)) |
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return true; |
|
} |
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return false; |
|
} |
|
|
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void CNode::AddWhitelistedRange(const CSubNet &subnet) { |
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LOCK(cs_vWhitelistedRange); |
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vWhitelistedRange.push_back(subnet); |
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} |
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|
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#undef X |
|
#define X(name) stats.name = name |
|
void CNode::copyStats(CNodeStats &stats) |
|
{ |
|
stats.nodeid = this->GetId(); |
|
X(nServices); |
|
X(nLastSend); |
|
X(nLastRecv); |
|
X(nTimeConnected); |
|
X(addrName); |
|
X(nVersion); |
|
X(cleanSubVer); |
|
X(fInbound); |
|
X(nStartingHeight); |
|
X(nSendBytes); |
|
X(nRecvBytes); |
|
X(fWhitelisted); |
|
stats.fSyncNode = (this == pnodeSync); |
|
|
|
// It is common for nodes with good ping times to suddenly become lagged, |
|
// due to a new block arriving or other large transfer. |
|
// Merely reporting pingtime might fool the caller into thinking the node was still responsive, |
|
// since pingtime does not update until the ping is complete, which might take a while. |
|
// So, if a ping is taking an unusually long time in flight, |
|
// the caller can immediately detect that this is happening. |
|
int64_t nPingUsecWait = 0; |
|
if ((0 != nPingNonceSent) && (0 != nPingUsecStart)) { |
|
nPingUsecWait = GetTimeMicros() - nPingUsecStart; |
|
} |
|
|
|
// Raw ping time is in microseconds, but show it to user as whole seconds (Bitcoin users should be well used to small numbers with many decimal places by now :) |
|
stats.dPingTime = (((double)nPingUsecTime) / 1e6); |
|
stats.dPingWait = (((double)nPingUsecWait) / 1e6); |
|
|
|
// Leave string empty if addrLocal invalid (not filled in yet) |
|
stats.addrLocal = addrLocal.IsValid() ? addrLocal.ToString() : ""; |
|
} |
|
#undef X |
|
|
|
// requires LOCK(cs_vRecvMsg) |
|
bool CNode::ReceiveMsgBytes(const char *pch, unsigned int nBytes) |
|
{ |
|
while (nBytes > 0) { |
|
|
|
// get current incomplete message, or create a new one |
|
if (vRecvMsg.empty() || |
|
vRecvMsg.back().complete()) |
|
vRecvMsg.push_back(CNetMessage(SER_NETWORK, nRecvVersion)); |
|
|
|
CNetMessage& msg = vRecvMsg.back(); |
|
|
|
// absorb network data |
|
int handled; |
|
if (!msg.in_data) |
|
handled = msg.readHeader(pch, nBytes); |
|
else |
|
handled = msg.readData(pch, nBytes); |
|
|
|
if (handled < 0) |
|
return false; |
|
|
|
pch += handled; |
|
nBytes -= handled; |
|
|
|
if (msg.complete()) |
|
msg.nTime = GetTimeMicros(); |
|
} |
|
|
|
return true; |
|
} |
|
|
|
int CNetMessage::readHeader(const char *pch, unsigned int nBytes) |
|
{ |
|
// copy data to temporary parsing buffer |
|
unsigned int nRemaining = 24 - nHdrPos; |
|
unsigned int nCopy = std::min(nRemaining, nBytes); |
|
|
|
memcpy(&hdrbuf[nHdrPos], pch, nCopy); |
|
nHdrPos += nCopy; |
|
|
|
// if header incomplete, exit |
|
if (nHdrPos < 24) |
|
return nCopy; |
|
|
|
// deserialize to CMessageHeader |
|
try { |
|
hdrbuf >> hdr; |
|
} |
|
catch (std::exception &e) { |
|
return -1; |
|
} |
|
|
|
// reject messages larger than MAX_SIZE |
|
if (hdr.nMessageSize > MAX_SIZE) |
|
return -1; |
|
|
|
// switch state to reading message data |
|
in_data = true; |
|
|
|
return nCopy; |
|
} |
|
|
|
int CNetMessage::readData(const char *pch, unsigned int nBytes) |
|
{ |
|
unsigned int nRemaining = hdr.nMessageSize - nDataPos; |
|
unsigned int nCopy = std::min(nRemaining, nBytes); |
|
|
|
if (vRecv.size() < nDataPos + nCopy) { |
|
// Allocate up to 256 KiB ahead, but never more than the total message size. |
|
vRecv.resize(std::min(hdr.nMessageSize, nDataPos + nCopy + 256 * 1024)); |
|
} |
|
|
|
memcpy(&vRecv[nDataPos], pch, nCopy); |
|
nDataPos += nCopy; |
|
|
|
return nCopy; |
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// requires LOCK(cs_vSend) |
|
void SocketSendData(CNode *pnode) |
|
{ |
|
std::deque<CSerializeData>::iterator it = pnode->vSendMsg.begin(); |
|
|
|
while (it != pnode->vSendMsg.end()) { |
|
const CSerializeData &data = *it; |
|
assert(data.size() > pnode->nSendOffset); |
|
int nBytes = send(pnode->hSocket, &data[pnode->nSendOffset], data.size() - pnode->nSendOffset, MSG_NOSIGNAL | MSG_DONTWAIT); |
|
if (nBytes > 0) { |
|
pnode->nLastSend = GetTime(); |
|
pnode->nSendBytes += nBytes; |
|
pnode->nSendOffset += nBytes; |
|
pnode->RecordBytesSent(nBytes); |
|
if (pnode->nSendOffset == data.size()) { |
|
pnode->nSendOffset = 0; |
|
pnode->nSendSize -= data.size(); |
|
it++; |
|
} else { |
|
// could not send full message; stop sending more |
|
break; |
|
} |
|
} else { |
|
if (nBytes < 0) { |
|
// error |
|
int nErr = WSAGetLastError(); |
|
if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS) |
|
{ |
|
LogPrintf("socket send error %s\n", NetworkErrorString(nErr)); |
|
pnode->CloseSocketDisconnect(); |
|
} |
|
} |
|
// couldn't send anything at all |
|
break; |
|
} |
|
} |
|
|
|
if (it == pnode->vSendMsg.end()) { |
|
assert(pnode->nSendOffset == 0); |
|
assert(pnode->nSendSize == 0); |
|
} |
|
pnode->vSendMsg.erase(pnode->vSendMsg.begin(), it); |
|
} |
|
|
|
static list<CNode*> vNodesDisconnected; |
|
|
|
void ThreadSocketHandler() |
|
{ |
|
unsigned int nPrevNodeCount = 0; |
|
while (true) |
|
{ |
|
// |
|
// Disconnect nodes |
|
// |
|
{ |
|
LOCK(cs_vNodes); |
|
// Disconnect unused nodes |
|
vector<CNode*> vNodesCopy = vNodes; |
|
BOOST_FOREACH(CNode* pnode, vNodesCopy) |
|
{ |
|
if (pnode->fDisconnect || |
|
(pnode->GetRefCount() <= 0 && pnode->vRecvMsg.empty() && pnode->nSendSize == 0 && pnode->ssSend.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(); |
|
|
|
// hold in disconnected pool until all refs are released |
|
if (pnode->fNetworkNode || pnode->fInbound) |
|
pnode->Release(); |
|
vNodesDisconnected.push_back(pnode); |
|
} |
|
} |
|
} |
|
{ |
|
// Delete disconnected nodes |
|
list<CNode*> 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_vRecvMsg, lockRecv); |
|
if (lockRecv) |
|
{ |
|
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(nPrevNodeCount); |
|
} |
|
|
|
// |
|
// 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(const ListenSocket& hListenSocket, vhListenSocket) { |
|
FD_SET(hListenSocket.socket, &fdsetRecv); |
|
hSocketMax = max(hSocketMax, hListenSocket.socket); |
|
have_fds = true; |
|
} |
|
|
|
{ |
|
LOCK(cs_vNodes); |
|
BOOST_FOREACH(CNode* pnode, vNodes) |
|
{ |
|
if (pnode->hSocket == INVALID_SOCKET) |
|
continue; |
|
FD_SET(pnode->hSocket, &fdsetError); |
|
hSocketMax = max(hSocketMax, pnode->hSocket); |
|
have_fds = true; |
|
|
|
// Implement the following logic: |
|
// * If there is data to send, select() for sending data. As this only |
|
// happens when optimistic write failed, we choose to first drain the |
|
// write buffer in this case before receiving more. This avoids |
|
// needlessly queueing received data, if the remote peer is not themselves |
|
// receiving data. This means properly utilizing TCP flow control signalling. |
|
// * Otherwise, if there is no (complete) message in the receive buffer, |
|
// or there is space left in the buffer, select() for receiving data. |
|
// * (if neither of the above applies, there is certainly one message |
|
// in the receiver buffer ready to be processed). |
|
// Together, that means that at least one of the following is always possible, |
|
// so we don't deadlock: |
|
// * We send some data. |
|
// * We wait for data to be received (and disconnect after timeout). |
|
// * We process a message in the buffer (message handler thread). |
|
{ |
|
TRY_LOCK(pnode->cs_vSend, lockSend); |
|
if (lockSend && !pnode->vSendMsg.empty()) { |
|
FD_SET(pnode->hSocket, &fdsetSend); |
|
continue; |
|
} |
|
} |
|
{ |
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv); |
|
if (lockRecv && ( |
|
pnode->vRecvMsg.empty() || !pnode->vRecvMsg.front().complete() || |
|
pnode->GetTotalRecvSize() <= ReceiveFloodSize())) |
|
FD_SET(pnode->hSocket, &fdsetRecv); |
|
} |
|
} |
|
} |
|
|
|
int nSelect = select(have_fds ? hSocketMax + 1 : 0, |
|
&fdsetRecv, &fdsetSend, &fdsetError, &timeout); |
|
boost::this_thread::interruption_point(); |
|
|
|
if (nSelect == SOCKET_ERROR) |
|
{ |
|
if (have_fds) |
|
{ |
|
int nErr = WSAGetLastError(); |
|
LogPrintf("socket select error %s\n", NetworkErrorString(nErr)); |
|
for (unsigned int i = 0; i <= hSocketMax; i++) |
|
FD_SET(i, &fdsetRecv); |
|
} |
|
FD_ZERO(&fdsetSend); |
|
FD_ZERO(&fdsetError); |
|
MilliSleep(timeout.tv_usec/1000); |
|
} |
|
|
|
// |
|
// Accept new connections |
|
// |
|
BOOST_FOREACH(const ListenSocket& hListenSocket, vhListenSocket) |
|
{ |
|
if (hListenSocket.socket != INVALID_SOCKET && FD_ISSET(hListenSocket.socket, &fdsetRecv)) |
|
{ |
|
struct sockaddr_storage sockaddr; |
|
socklen_t len = sizeof(sockaddr); |
|
SOCKET hSocket = accept(hListenSocket.socket, (struct sockaddr*)&sockaddr, &len); |
|
CAddress addr; |
|
int nInbound = 0; |
|
|
|
if (hSocket != INVALID_SOCKET) |
|
if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr)) |
|
LogPrintf("Warning: Unknown socket family\n"); |
|
|
|
bool whitelisted = hListenSocket.whitelisted || CNode::IsWhitelistedRange(addr); |
|
{ |
|
LOCK(cs_vNodes); |
|
BOOST_FOREACH(CNode* pnode, vNodes) |
|
if (pnode->fInbound) |
|
nInbound++; |
|
} |
|
|
|
if (hSocket == INVALID_SOCKET) |
|
{ |
|
int nErr = WSAGetLastError(); |
|
if (nErr != WSAEWOULDBLOCK) |
|
LogPrintf("socket error accept failed: %s\n", NetworkErrorString(nErr)); |
|
} |
|
else if (nInbound >= nMaxConnections - MAX_OUTBOUND_CONNECTIONS) |
|
{ |
|
CloseSocket(hSocket); |
|
} |
|
else if (CNode::IsBanned(addr) && !whitelisted) |
|
{ |
|
LogPrintf("connection from %s dropped (banned)\n", addr.ToString()); |
|
CloseSocket(hSocket); |
|
} |
|
else |
|
{ |
|
CNode* pnode = new CNode(hSocket, addr, "", true); |
|
pnode->AddRef(); |
|
pnode->fWhitelisted = whitelisted; |
|
|
|
{ |
|
LOCK(cs_vNodes); |
|
vNodes.push_back(pnode); |
|
} |
|
} |
|
} |
|
} |
|
|
|
// |
|
// Service each socket |
|
// |
|
vector<CNode*> vNodesCopy; |
|
{ |
|
LOCK(cs_vNodes); |
|
vNodesCopy = vNodes; |
|
BOOST_FOREACH(CNode* pnode, vNodesCopy) |
|
pnode->AddRef(); |
|
} |
|
BOOST_FOREACH(CNode* pnode, vNodesCopy) |
|
{ |
|
boost::this_thread::interruption_point(); |
|
|
|
// |
|
// Receive |
|
// |
|
if (pnode->hSocket == INVALID_SOCKET) |
|
continue; |
|
if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError)) |
|
{ |
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv); |
|
if (lockRecv) |
|
{ |
|
{ |
|
// typical socket buffer is 8K-64K |
|
char pchBuf[0x10000]; |
|
int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT); |
|
if (nBytes > 0) |
|
{ |
|
if (!pnode->ReceiveMsgBytes(pchBuf, nBytes)) |
|
pnode->CloseSocketDisconnect(); |
|
pnode->nLastRecv = GetTime(); |
|
pnode->nRecvBytes += nBytes; |
|
pnode->RecordBytesRecv(nBytes); |
|
} |
|
else if (nBytes == 0) |
|
{ |
|
// socket closed gracefully |
|
if (!pnode->fDisconnect) |
|
LogPrint("net", "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) |
|
LogPrintf("socket recv error %s\n", NetworkErrorString(nErr)); |
|
pnode->CloseSocketDisconnect(); |
|
} |
|
} |
|
} |
|
} |
|
} |
|
|
|
// |
|
// Send |
|
// |
|
if (pnode->hSocket == INVALID_SOCKET) |
|
continue; |
|
if (FD_ISSET(pnode->hSocket, &fdsetSend)) |
|
{ |
|
TRY_LOCK(pnode->cs_vSend, lockSend); |
|
if (lockSend) |
|
SocketSendData(pnode); |
|
} |
|
|
|
// |
|
// Inactivity checking |
|
// |
|
int64_t nTime = GetTime(); |
|
if (nTime - pnode->nTimeConnected > 60) |
|
{ |
|
if (pnode->nLastRecv == 0 || pnode->nLastSend == 0) |
|
{ |
|
LogPrint("net", "socket no message in first 60 seconds, %d %d from %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0, pnode->id); |
|
pnode->fDisconnect = true; |
|
} |
|
else if (nTime - pnode->nLastSend > TIMEOUT_INTERVAL) |
|
{ |
|
LogPrintf("socket sending timeout: %is\n", nTime - pnode->nLastSend); |
|
pnode->fDisconnect = true; |
|
} |
|
else if (nTime - pnode->nLastRecv > (pnode->nVersion > BIP0031_VERSION ? TIMEOUT_INTERVAL : 90*60)) |
|
{ |
|
LogPrintf("socket receive timeout: %is\n", nTime - pnode->nLastRecv); |
|
pnode->fDisconnect = true; |
|
} |
|
else if (pnode->nPingNonceSent && pnode->nPingUsecStart + TIMEOUT_INTERVAL * 1000000 < GetTimeMicros()) |
|
{ |
|
LogPrintf("ping timeout: %fs\n", 0.000001 * (GetTimeMicros() - pnode->nPingUsecStart)); |
|
pnode->fDisconnect = true; |
|
} |
|
} |
|
} |
|
{ |
|
LOCK(cs_vNodes); |
|
BOOST_FOREACH(CNode* pnode, vNodesCopy) |
|
pnode->Release(); |
|
} |
|
|
|
MilliSleep(10); |
|
} |
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef USE_UPNP |
|
void ThreadMapPort() |
|
{ |
|
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) |
|
LogPrintf("UPnP: GetExternalIPAddress() returned %d\n", r); |
|
else |
|
{ |
|
if(externalIPAddress[0]) |
|
{ |
|
LogPrintf("UPnP: ExternalIPAddress = %s\n", externalIPAddress); |
|
AddLocal(CNetAddr(externalIPAddress), LOCAL_UPNP); |
|
} |
|
else |
|
LogPrintf("UPnP: GetExternalIPAddress failed.\n"); |
|
} |
|
} |
|
|
|
string strDesc = "Bitcoin " + FormatFullVersion(); |
|
|
|
try { |
|
while (true) { |
|
#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) |
|
LogPrintf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n", |
|
port, port, lanaddr, r, strupnperror(r)); |
|
else |
|
LogPrintf("UPnP Port Mapping successful.\n");; |
|
|
|
MilliSleep(20*60*1000); // Refresh every 20 minutes |
|
} |
|
} |
|
catch (boost::thread_interrupted) |
|
{ |
|
r = UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype, port.c_str(), "TCP", 0); |
|
LogPrintf("UPNP_DeletePortMapping() returned : %d\n", r); |
|
freeUPNPDevlist(devlist); devlist = 0; |
|
FreeUPNPUrls(&urls); |
|
throw; |
|
} |
|
} else { |
|
LogPrintf("No valid UPnP IGDs found\n"); |
|
freeUPNPDevlist(devlist); devlist = 0; |
|
if (r != 0) |
|
FreeUPNPUrls(&urls); |
|
} |
|
} |
|
|
|
void MapPort(bool fUseUPnP) |
|
{ |
|
static boost::thread* upnp_thread = NULL; |
|
|
|
if (fUseUPnP) |
|
{ |
|
if (upnp_thread) { |
|
upnp_thread->interrupt(); |
|
upnp_thread->join(); |
|
delete upnp_thread; |
|
} |
|
upnp_thread = new boost::thread(boost::bind(&TraceThread<void (*)()>, "upnp", &ThreadMapPort)); |
|
} |
|
else if (upnp_thread) { |
|
upnp_thread->interrupt(); |
|
upnp_thread->join(); |
|
delete upnp_thread; |
|
upnp_thread = NULL; |
|
} |
|
} |
|
|
|
#else |
|
void MapPort(bool) |
|
{ |
|
// Intentionally left blank. |
|
} |
|
#endif |
|
|
|
|
|
|
|
|
|
|
|
|
|
void ThreadDNSAddressSeed() |
|
{ |
|
const vector<CDNSSeedData> &vSeeds = Params().DNSSeeds(); |
|
int found = 0; |
|
|
|
LogPrintf("Loading addresses from DNS seeds (could take a while)\n"); |
|
|
|
BOOST_FOREACH(const CDNSSeedData &seed, vSeeds) { |
|
if (HaveNameProxy()) { |
|
AddOneShot(seed.host); |
|
} else { |
|
vector<CNetAddr> vIPs; |
|
vector<CAddress> vAdd; |
|
if (LookupHost(seed.host.c_str(), vIPs)) |
|
{ |
|
BOOST_FOREACH(CNetAddr& ip, vIPs) |
|
{ |
|
int nOneDay = 24*3600; |
|
CAddress addr = CAddress(CService(ip, Params().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(seed.name, true)); |
|
} |
|
} |
|
|
|
LogPrintf("%d addresses found from DNS seeds\n", found); |
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void DumpAddresses() |
|
{ |
|
int64_t nStart = GetTimeMillis(); |
|
|
|
CAddrDB adb; |
|
adb.Write(addrman); |
|
|
|
LogPrint("net", "Flushed %d addresses to peers.dat %dms\n", |
|
addrman.size(), GetTimeMillis() - nStart); |
|
} |
|
|
|
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 ThreadOpenConnections() |
|
{ |
|
// Connect to specific addresses |
|
if (mapArgs.count("-connect") && mapMultiArgs["-connect"].size() > 0) |
|
{ |
|
for (int64_t 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++) |
|
{ |
|
MilliSleep(500); |
|
} |
|
} |
|
MilliSleep(500); |
|
} |
|
} |
|
|
|
// Initiate network connections |
|
int64_t nStart = GetTime(); |
|
while (true) |
|
{ |
|
ProcessOneShot(); |
|
|
|
MilliSleep(500); |
|
|
|
CSemaphoreGrant grant(*semOutbound); |
|
boost::this_thread::interruption_point(); |
|
|
|
// Add seed nodes if DNS seeds are all down (an infrastructure attack?). |
|
if (addrman.size() == 0 && (GetTime() - nStart > 60)) { |
|
static bool done = false; |
|
if (!done) { |
|
LogPrintf("Adding fixed seed nodes as DNS doesn't seem to be available.\n"); |
|
addrman.Add(Params().FixedSeeds(), CNetAddr("127.0.0.1")); |
|
done = true; |
|
} |
|
} |
|
|
|
// |
|
// 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<vector<unsigned char> > setConnected; |
|
{ |
|
LOCK(cs_vNodes); |
|
BOOST_FOREACH(CNode* pnode, vNodes) { |
|
if (!pnode->fInbound) { |
|
setConnected.insert(pnode->addr.GetGroup()); |
|
nOutbound++; |
|
} |
|
} |
|
} |
|
|
|
int64_t nANow = GetAdjustedTime(); |
|
|
|
int nTries = 0; |
|
while (true) |
|
{ |
|
// 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() != Params().GetDefaultPort() && nTries < 50) |
|
continue; |
|
|
|
addrConnect = addr; |
|
break; |
|
} |
|
|
|
if (addrConnect.IsValid()) |
|
OpenNetworkConnection(addrConnect, &grant); |
|
} |
|
} |
|
|
|
void ThreadOpenAddedConnections() |
|
{ |
|
{ |
|
LOCK(cs_vAddedNodes); |
|
vAddedNodes = mapMultiArgs["-addnode"]; |
|
} |
|
|
|
if (HaveNameProxy()) { |
|
while(true) { |
|
list<string> lAddresses(0); |
|
{ |
|
LOCK(cs_vAddedNodes); |
|
BOOST_FOREACH(string& strAddNode, vAddedNodes) |
|
lAddresses.push_back(strAddNode); |
|
} |
|
BOOST_FOREACH(string& strAddNode, lAddresses) { |
|
CAddress addr; |
|
CSemaphoreGrant grant(*semOutbound); |
|
OpenNetworkConnection(addr, &grant, strAddNode.c_str()); |
|
MilliSleep(500); |
|
} |
|
MilliSleep(120000); // Retry every 2 minutes |
|
} |
|
} |
|
|
|
for (unsigned int i = 0; true; i++) |
|
{ |
|
list<string> lAddresses(0); |
|
{ |
|
LOCK(cs_vAddedNodes); |
|
BOOST_FOREACH(string& strAddNode, vAddedNodes) |
|
lAddresses.push_back(strAddNode); |
|
} |
|
|
|
list<vector<CService> > lservAddressesToAdd(0); |
|
BOOST_FOREACH(string& strAddNode, lAddresses) |
|
{ |
|
vector<CService> vservNode(0); |
|
if(Lookup(strAddNode.c_str(), vservNode, Params().GetDefaultPort(), fNameLookup, 0)) |
|
{ |
|
lservAddressesToAdd.push_back(vservNode); |
|
{ |
|
LOCK(cs_setservAddNodeAddresses); |
|
BOOST_FOREACH(CService& serv, vservNode) |
|
setservAddNodeAddresses.insert(serv); |
|
} |
|
} |
|
} |
|
// 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 (list<vector<CService> >::iterator it = lservAddressesToAdd.begin(); it != lservAddressesToAdd.end(); it++) |
|
BOOST_FOREACH(CService& addrNode, *(it)) |
|
if (pnode->addr == addrNode) |
|
{ |
|
it = lservAddressesToAdd.erase(it); |
|
it--; |
|
break; |
|
} |
|
} |
|
BOOST_FOREACH(vector<CService>& vserv, lservAddressesToAdd) |
|
{ |
|
CSemaphoreGrant grant(*semOutbound); |
|
OpenNetworkConnection(CAddress(vserv[i % vserv.size()]), &grant); |
|
MilliSleep(500); |
|
} |
|
MilliSleep(120000); // Retry every 2 minutes |
|
} |
|
} |
|
|
|
// if successful, this moves the passed grant to the constructed node |
|
bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOutbound, const char *pszDest, bool fOneShot) |
|
{ |
|
// |
|
// Initiate outbound network connection |
|
// |
|
boost::this_thread::interruption_point(); |
|
if (!pszDest) { |
|
if (IsLocal(addrConnect) || |
|
FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect) || |
|
FindNode(addrConnect.ToStringIPPort())) |
|
return false; |
|
} else if (FindNode(pszDest)) |
|
return false; |
|
|
|
CNode* pnode = ConnectNode(addrConnect, pszDest); |
|
boost::this_thread::interruption_point(); |
|
|
|
if (!pnode) |
|
return false; |
|
if (grantOutbound) |
|
grantOutbound->MoveTo(pnode->grantOutbound); |
|
pnode->fNetworkNode = true; |
|
if (fOneShot) |
|
pnode->fOneShot = true; |
|
|
|
return true; |
|
} |
|
|
|
|
|
// for now, use a very simple selection metric: the node from which we received |
|
// most recently |
|
static int64_t NodeSyncScore(const CNode *pnode) { |
|
return pnode->nLastRecv; |
|
} |
|
|
|
void static StartSync(const vector<CNode*> &vNodes) { |
|
CNode *pnodeNewSync = NULL; |
|
int64_t nBestScore = 0; |
|
|
|
int nBestHeight = g_signals.GetHeight().get_value_or(0); |
|
|
|
// Iterate over all nodes |
|
BOOST_FOREACH(CNode* pnode, vNodes) { |
|
// check preconditions for allowing a sync |
|
if (!pnode->fClient && !pnode->fOneShot && |
|
!pnode->fDisconnect && pnode->fSuccessfullyConnected && |
|
(pnode->nStartingHeight > (nBestHeight - 144)) && |
|
(pnode->nVersion < NOBLKS_VERSION_START || pnode->nVersion >= NOBLKS_VERSION_END)) { |
|
// if ok, compare node's score with the best so far |
|
int64_t nScore = NodeSyncScore(pnode); |
|
if (pnodeNewSync == NULL || nScore > nBestScore) { |
|
pnodeNewSync = pnode; |
|
nBestScore = nScore; |
|
} |
|
} |
|
} |
|
// if a new sync candidate was found, start sync! |
|
if (pnodeNewSync) { |
|
pnodeNewSync->fStartSync = true; |
|
pnodeSync = pnodeNewSync; |
|
} |
|
} |
|
|
|
void ThreadMessageHandler() |
|
{ |
|
SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL); |
|
while (true) |
|
{ |
|
bool fHaveSyncNode = false; |
|
|
|
vector<CNode*> vNodesCopy; |
|
{ |
|
LOCK(cs_vNodes); |
|
vNodesCopy = vNodes; |
|
BOOST_FOREACH(CNode* pnode, vNodesCopy) { |
|
pnode->AddRef(); |
|
if (pnode == pnodeSync) |
|
fHaveSyncNode = true; |
|
} |
|
} |
|
|
|
if (!fHaveSyncNode) |
|
StartSync(vNodesCopy); |
|
|
|
// Poll the connected nodes for messages |
|
CNode* pnodeTrickle = NULL; |
|
if (!vNodesCopy.empty()) |
|
pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())]; |
|
|
|
bool fSleep = true; |
|
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy) |
|
{ |
|
if (pnode->fDisconnect) |
|
continue; |
|
|
|
// Receive messages |
|
{ |
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv); |
|
if (lockRecv) |
|
{ |
|
if (!g_signals.ProcessMessages(pnode)) |
|
pnode->CloseSocketDisconnect(); |
|
|
|
if (pnode->nSendSize < SendBufferSize()) |
|
{ |
|
if (!pnode->vRecvGetData.empty() || (!pnode->vRecvMsg.empty() && pnode->vRecvMsg[0].complete())) |
|
{ |
|
fSleep = false; |
|
} |
|
} |
|
} |
|
} |
|
boost::this_thread::interruption_point(); |
|
|
|
// Send messages |
|
{ |
|
TRY_LOCK(pnode->cs_vSend, lockSend); |
|
if (lockSend) |
|
g_signals.SendMessages(pnode, pnode == pnodeTrickle); |
|
} |
|
boost::this_thread::interruption_point(); |
|
} |
|
|
|
{ |
|
LOCK(cs_vNodes); |
|
BOOST_FOREACH(CNode* pnode, vNodesCopy) |
|
pnode->Release(); |
|
} |
|
|
|
if (fSleep) |
|
MilliSleep(100); |
|
} |
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
bool BindListenPort(const CService &addrBind, string& strError, bool fWhitelisted) |
|
{ |
|
strError = ""; |
|
int nOne = 1; |
|
|
|
// Create socket for listening for incoming connections |
|
struct sockaddr_storage sockaddr; |
|
socklen_t len = sizeof(sockaddr); |
|
if (!addrBind.GetSockAddr((struct sockaddr*)&sockaddr, &len)) |
|
{ |
|
strError = strprintf("Error: Bind address family for %s not supported", addrBind.ToString()); |
|
LogPrintf("%s\n", strError); |
|
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 %s)", NetworkErrorString(WSAGetLastError())); |
|
LogPrintf("%s\n", strError); |
|
return false; |
|
} |
|
|
|
#ifndef WIN32 |
|
#ifdef SO_NOSIGPIPE |
|
// Different way of disabling SIGPIPE on BSD |
|
setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int)); |
|
#endif |
|
// 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 |
|
|
|
// Set to non-blocking, incoming connections will also inherit this |
|
if (!SetSocketNonBlocking(hListenSocket, true)) { |
|
strError = strprintf("BindListenPort: Setting listening socket to non-blocking failed, error %s\n", NetworkErrorString(WSAGetLastError())); |
|
LogPrintf("%s\n", strError); |
|
return false; |
|
} |
|
|
|
// 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 |
|
#ifdef WIN32 |
|
setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&nOne, sizeof(int)); |
|
#else |
|
setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&nOne, sizeof(int)); |
|
#endif |
|
#endif |
|
#ifdef WIN32 |
|
int nProtLevel = PROTECTION_LEVEL_UNRESTRICTED; |
|
setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL, (const char*)&nProtLevel, sizeof(int)); |
|
#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 Core is probably already running."), addrBind.ToString()); |
|
else |
|
strError = strprintf(_("Unable to bind to %s on this computer (bind returned error %s)"), addrBind.ToString(), NetworkErrorString(nErr)); |
|
LogPrintf("%s\n", strError); |
|
CloseSocket(hListenSocket); |
|
return false; |
|
} |
|
LogPrintf("Bound to %s\n", addrBind.ToString()); |
|
|
|
// Listen for incoming connections |
|
if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR) |
|
{ |
|
strError = strprintf(_("Error: Listening for incoming connections failed (listen returned error %s)"), NetworkErrorString(WSAGetLastError())); |
|
LogPrintf("%s\n", strError); |
|
CloseSocket(hListenSocket); |
|
return false; |
|
} |
|
|
|
vhListenSocket.push_back(ListenSocket(hListenSocket, fWhitelisted)); |
|
|
|
if (addrBind.IsRoutable() && fDiscover && !fWhitelisted) |
|
AddLocal(addrBind, LOCAL_BIND); |
|
|
|
return true; |
|
} |
|
|
|
void static Discover(boost::thread_group& threadGroup) |
|
{ |
|
if (!fDiscover) |
|
return; |
|
|
|
#ifdef WIN32 |
|
// Get local host IP |
|
char pszHostName[1000] = ""; |
|
if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR) |
|
{ |
|
vector<CNetAddr> 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)) |
|
LogPrintf("IPv4 %s: %s\n", ifa->ifa_name, addr.ToString()); |
|
} |
|
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)) |
|
LogPrintf("IPv6 %s: %s\n", ifa->ifa_name, addr.ToString()); |
|
} |
|
} |
|
freeifaddrs(myaddrs); |
|
} |
|
#endif |
|
|
|
// Don't use external IPv4 discovery, when -onlynet="IPv6" |
|
if (!IsLimited(NET_IPV4)) |
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "ext-ip", &ThreadGetMyExternalIP)); |
|
} |
|
|
|
void StartNode(boost::thread_group& threadGroup) |
|
{ |
|
if (semOutbound == NULL) { |
|
// initialize semaphore |
|
int nMaxOutbound = min(MAX_OUTBOUND_CONNECTIONS, nMaxConnections); |
|
semOutbound = new CSemaphore(nMaxOutbound); |
|
} |
|
|
|
if (pnodeLocalHost == NULL) |
|
pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress(CService("127.0.0.1", 0), nLocalServices)); |
|
|
|
Discover(threadGroup); |
|
|
|
// |
|
// Start threads |
|
// |
|
|
|
if (!GetBoolArg("-dnsseed", true)) |
|
LogPrintf("DNS seeding disabled\n"); |
|
else |
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "dnsseed", &ThreadDNSAddressSeed)); |
|
|
|
// Map ports with UPnP |
|
MapPort(GetBoolArg("-upnp", DEFAULT_UPNP)); |
|
|
|
// Send and receive from sockets, accept connections |
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "net", &ThreadSocketHandler)); |
|
|
|
// Initiate outbound connections from -addnode |
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "addcon", &ThreadOpenAddedConnections)); |
|
|
|
// Initiate outbound connections |
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "opencon", &ThreadOpenConnections)); |
|
|
|
// Process messages |
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "msghand", &ThreadMessageHandler)); |
|
|
|
// Dump network addresses |
|
threadGroup.create_thread(boost::bind(&LoopForever<void (*)()>, "dumpaddr", &DumpAddresses, DUMP_ADDRESSES_INTERVAL * 1000)); |
|
} |
|
|
|
bool StopNode() |
|
{ |
|
LogPrintf("StopNode()\n"); |
|
MapPort(false); |
|
if (semOutbound) |
|
for (int i=0; i<MAX_OUTBOUND_CONNECTIONS; i++) |
|
semOutbound->post(); |
|
MilliSleep(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(ListenSocket& hListenSocket, vhListenSocket) |
|
if (hListenSocket.socket != INVALID_SOCKET) |
|
if (!CloseSocket(hListenSocket.socket)) |
|
LogPrintf("CloseSocket(hListenSocket) failed with error %s\n", NetworkErrorString(WSAGetLastError())); |
|
|
|
// clean up some globals (to help leak detection) |
|
BOOST_FOREACH(CNode *pnode, vNodes) |
|
delete pnode; |
|
BOOST_FOREACH(CNode *pnode, vNodesDisconnected) |
|
delete pnode; |
|
vNodes.clear(); |
|
vNodesDisconnected.clear(); |
|
vhListenSocket.clear(); |
|
delete semOutbound; |
|
semOutbound = NULL; |
|
delete pnodeLocalHost; |
|
pnodeLocalHost = NULL; |
|
|
|
#ifdef WIN32 |
|
// Shutdown Windows Sockets |
|
WSACleanup(); |
|
#endif |
|
} |
|
} |
|
instance_of_cnetcleanup; |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void RelayTransaction(const CTransaction& tx) |
|
{ |
|
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION); |
|
ss.reserve(10000); |
|
ss << tx; |
|
RelayTransaction(tx, ss); |
|
} |
|
|
|
void RelayTransaction(const CTransaction& tx, const CDataStream& ss) |
|
{ |
|
CInv inv(MSG_TX, tx.GetHash()); |
|
{ |
|
LOCK(cs_mapRelay); |
|
// Expire old relay messages |
|
while (!vRelayExpiration.empty() && vRelayExpiration.front().first < GetTime()) |
|
{ |
|
mapRelay.erase(vRelayExpiration.front().second); |
|
vRelayExpiration.pop_front(); |
|
} |
|
|
|
// Save original serialized message so newer versions are preserved |
|
mapRelay.insert(std::make_pair(inv, ss)); |
|
vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, inv)); |
|
} |
|
LOCK(cs_vNodes); |
|
BOOST_FOREACH(CNode* pnode, vNodes) |
|
{ |
|
if(!pnode->fRelayTxes) |
|
continue; |
|
LOCK(pnode->cs_filter); |
|
if (pnode->pfilter) |
|
{ |
|
if (pnode->pfilter->IsRelevantAndUpdate(tx)) |
|
pnode->PushInventory(inv); |
|
} else |
|
pnode->PushInventory(inv); |
|
} |
|
} |
|
|
|
void CNode::RecordBytesRecv(uint64_t bytes) |
|
{ |
|
LOCK(cs_totalBytesRecv); |
|
nTotalBytesRecv += bytes; |
|
} |
|
|
|
void CNode::RecordBytesSent(uint64_t bytes) |
|
{ |
|
LOCK(cs_totalBytesSent); |
|
nTotalBytesSent += bytes; |
|
} |
|
|
|
uint64_t CNode::GetTotalBytesRecv() |
|
{ |
|
LOCK(cs_totalBytesRecv); |
|
return nTotalBytesRecv; |
|
} |
|
|
|
uint64_t CNode::GetTotalBytesSent() |
|
{ |
|
LOCK(cs_totalBytesSent); |
|
return nTotalBytesSent; |
|
} |
|
|
|
void CNode::Fuzz(int nChance) |
|
{ |
|
if (!fSuccessfullyConnected) return; // Don't fuzz initial handshake |
|
if (GetRand(nChance) != 0) return; // Fuzz 1 of every nChance messages |
|
|
|
switch (GetRand(3)) |
|
{ |
|
case 0: |
|
// xor a random byte with a random value: |
|
if (!ssSend.empty()) { |
|
CDataStream::size_type pos = GetRand(ssSend.size()); |
|
ssSend[pos] ^= (unsigned char)(GetRand(256)); |
|
} |
|
break; |
|
case 1: |
|
// delete a random byte: |
|
if (!ssSend.empty()) { |
|
CDataStream::size_type pos = GetRand(ssSend.size()); |
|
ssSend.erase(ssSend.begin()+pos); |
|
} |
|
break; |
|
case 2: |
|
// insert a random byte at a random position |
|
{ |
|
CDataStream::size_type pos = GetRand(ssSend.size()); |
|
char ch = (char)GetRand(256); |
|
ssSend.insert(ssSend.begin()+pos, ch); |
|
} |
|
break; |
|
} |
|
// Chance of more than one change half the time: |
|
// (more changes exponentially less likely): |
|
Fuzz(2); |
|
} |
|
|
|
// |
|
// CAddrDB |
|
// |
|
|
|
CAddrDB::CAddrDB() |
|
{ |
|
pathAddr = GetDataDir() / "peers.dat"; |
|
} |
|
|
|
bool CAddrDB::Write(const CAddrMan& addr) |
|
{ |
|
// Generate random temporary filename |
|
unsigned short randv = 0; |
|
GetRandBytes((unsigned char*)&randv, sizeof(randv)); |
|
std::string tmpfn = strprintf("peers.dat.%04x", randv); |
|
|
|
// serialize addresses, checksum data up to that point, then append csum |
|
CDataStream ssPeers(SER_DISK, CLIENT_VERSION); |
|
ssPeers << FLATDATA(Params().MessageStart()); |
|
ssPeers << addr; |
|
uint256 hash = Hash(ssPeers.begin(), ssPeers.end()); |
|
ssPeers << hash; |
|
|
|
// open temp output file, and associate with CAutoFile |
|
boost::filesystem::path pathTmp = GetDataDir() / tmpfn; |
|
FILE *file = fopen(pathTmp.string().c_str(), "wb"); |
|
CAutoFile fileout = CAutoFile(file, SER_DISK, CLIENT_VERSION); |
|
if (!fileout) |
|
return error("%s : Failed to open file %s", __func__, pathTmp.string()); |
|
|
|
// Write and commit header, data |
|
try { |
|
fileout << ssPeers; |
|
} |
|
catch (std::exception &e) { |
|
return error("%s : Serialize or I/O error - %s", __func__, e.what()); |
|
} |
|
FileCommit(fileout); |
|
fileout.fclose(); |
|
|
|
// replace existing peers.dat, if any, with new peers.dat.XXXX |
|
if (!RenameOver(pathTmp, pathAddr)) |
|
return error("%s : Rename-into-place failed", __func__); |
|
|
|
return true; |
|
} |
|
|
|
bool CAddrDB::Read(CAddrMan& addr) |
|
{ |
|
// open input file, and associate with CAutoFile |
|
FILE *file = fopen(pathAddr.string().c_str(), "rb"); |
|
CAutoFile filein = CAutoFile(file, SER_DISK, CLIENT_VERSION); |
|
if (!filein) |
|
return error("%s : Failed to open file %s", __func__, pathAddr.string()); |
|
|
|
// use file size to size memory buffer |
|
int fileSize = boost::filesystem::file_size(pathAddr); |
|
int dataSize = fileSize - sizeof(uint256); |
|
// Don't try to resize to a negative number if file is small |
|
if (dataSize < 0) |
|
dataSize = 0; |
|
vector<unsigned char> vchData; |
|
vchData.resize(dataSize); |
|
uint256 hashIn; |
|
|
|
// read data and checksum from file |
|
try { |
|
filein.read((char *)&vchData[0], dataSize); |
|
filein >> hashIn; |
|
} |
|
catch (std::exception &e) { |
|
return error("%s : Deserialize or I/O error - %s", __func__, e.what()); |
|
} |
|
filein.fclose(); |
|
|
|
CDataStream ssPeers(vchData, SER_DISK, CLIENT_VERSION); |
|
|
|
// verify stored checksum matches input data |
|
uint256 hashTmp = Hash(ssPeers.begin(), ssPeers.end()); |
|
if (hashIn != hashTmp) |
|
return error("%s : Checksum mismatch, data corrupted", __func__); |
|
|
|
unsigned char pchMsgTmp[4]; |
|
try { |
|
// de-serialize file header (network specific magic number) and .. |
|
ssPeers >> FLATDATA(pchMsgTmp); |
|
|
|
// ... verify the network matches ours |
|
if (memcmp(pchMsgTmp, Params().MessageStart(), sizeof(pchMsgTmp))) |
|
return error("%s : Invalid network magic number", __func__); |
|
|
|
// de-serialize address data into one CAddrMan object |
|
ssPeers >> addr; |
|
} |
|
catch (std::exception &e) { |
|
return error("%s : Deserialize or I/O error - %s", __func__, e.what()); |
|
} |
|
|
|
return true; |
|
}
|
|
|