f3967bcc50
bitcoin-config.h moved, but the old file is likely to still exist when reconfiguring or switching branches. This would've caused files to not rebuild correctly, and other strange problems. Make the path explicit so that the old one cannot be found. Core libs use config/bitcoin-config.h. Libs (like crypto) which don't want access to bitcoin's headers continue to use -Iconfig and #include bitcoin-config.h.
2008 lines
60 KiB
C++
2008 lines
60 KiB
C++
// 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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#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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#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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#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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using namespace std;
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using namespace boost;
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static const int MAX_OUTBOUND_CONNECTIONS = 8;
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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<SOCKET> 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(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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LogPrint("net", "connected %s\n", pszDest ? pszDest : addrConnect.ToString());
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// Set to non-blocking
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#ifdef WIN32
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u_long nOne = 1;
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if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR)
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LogPrintf("ConnectSocket() : ioctlsocket non-blocking setting failed, error %s\n", NetworkErrorString(WSAGetLastError()));
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#else
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if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
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LogPrintf("ConnectSocket() : fcntl non-blocking setting failed, error %s\n", NetworkErrorString(errno));
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#endif
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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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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 node %s\n", addrName);
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closesocket(hSocket);
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hSocket = INVALID_SOCKET;
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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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// 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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void CNode::PushVersion()
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{
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int nBestHeight = g_signals.GetHeight().get_value_or(0);
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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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RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
|
|
LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%s\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), addrYou.ToString(), addr.ToString());
|
|
PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
|
|
nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, std::vector<string>()), nBestHeight, true);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
std::map<CNetAddr, int64_t> CNode::setBanned;
|
|
CCriticalSection CNode::cs_setBanned;
|
|
|
|
void CNode::ClearBanned()
|
|
{
|
|
setBanned.clear();
|
|
}
|
|
|
|
bool CNode::IsBanned(CNetAddr ip)
|
|
{
|
|
bool fResult = false;
|
|
{
|
|
LOCK(cs_setBanned);
|
|
std::map<CNetAddr, int64_t>::iterator i = setBanned.find(ip);
|
|
if (i != setBanned.end())
|
|
{
|
|
int64_t t = (*i).second;
|
|
if (GetTime() < t)
|
|
fResult = true;
|
|
}
|
|
}
|
|
return fResult;
|
|
}
|
|
|
|
bool CNode::Ban(const CNetAddr &addr) {
|
|
int64_t banTime = GetTime()+GetArg("-bantime", 60*60*24); // Default 24-hour ban
|
|
{
|
|
LOCK(cs_setBanned);
|
|
if (setBanned[addr] < banTime)
|
|
setBanned[addr] = banTime;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#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);
|
|
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;
|
|
}
|
|
|
|
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(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, &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(SOCKET hListenSocket, vhListenSocket)
|
|
if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
|
|
{
|
|
struct sockaddr_storage sockaddr;
|
|
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))
|
|
LogPrintf("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)
|
|
LogPrintf("socket error accept failed: %s\n", NetworkErrorString(nErr));
|
|
}
|
|
else if (nInbound >= nMaxConnections - MAX_OUTBOUND_CONNECTIONS)
|
|
{
|
|
closesocket(hSocket);
|
|
}
|
|
else if (CNode::IsBanned(addr))
|
|
{
|
|
LogPrintf("connection from %s dropped (banned)\n", addr.ToString());
|
|
closesocket(hSocket);
|
|
}
|
|
else
|
|
{
|
|
LogPrint("net", "accepted connection %s\n", addr.ToString());
|
|
CNode* pnode = new CNode(hSocket, addr, "", true);
|
|
pnode->AddRef();
|
|
{
|
|
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\n", pnode->nLastRecv != 0, pnode->nLastSend != 0);
|
|
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().c_str()))
|
|
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)
|
|
{
|
|
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;
|
|
}
|
|
|
|
#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 %s)", 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 = 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
|
|
}
|
|
|
|
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);
|
|
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);
|
|
return false;
|
|
}
|
|
|
|
vhListenSocket.push_back(hListenSocket);
|
|
|
|
if (addrBind.IsRoutable() && fDiscover)
|
|
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(SOCKET hListenSocket, vhListenSocket)
|
|
if (hListenSocket != INVALID_SOCKET)
|
|
if (closesocket(hListenSocket) == SOCKET_ERROR)
|
|
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;
|
|
RAND_bytes((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;
|
|
}
|