1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2014 The Bitcoin Core developers
3 // Distributed under the MIT software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
6 #if defined(HAVE_CONFIG_H)
7 #include "config/bitcoin-config.h"
13 #include "chainparams.h"
14 #include "clientversion.h"
15 #include "primitives/transaction.h"
16 #include "scheduler.h"
17 #include "ui_interface.h"
18 #include "crypto/common.h"
27 #include <miniupnpc/miniupnpc.h>
28 #include <miniupnpc/miniwget.h>
29 #include <miniupnpc/upnpcommands.h>
30 #include <miniupnpc/upnperrors.h>
33 #include <boost/filesystem.hpp>
34 #include <boost/thread.hpp>
36 // Dump addresses to peers.dat every 15 minutes (900s)
37 #define DUMP_ADDRESSES_INTERVAL 900
39 #if !defined(HAVE_MSG_NOSIGNAL) && !defined(MSG_NOSIGNAL)
40 #define MSG_NOSIGNAL 0
43 // Fix for ancient MinGW versions, that don't have defined these in ws2tcpip.h.
44 // Todo: Can be removed when our pull-tester is upgraded to a modern MinGW version.
46 #ifndef PROTECTION_LEVEL_UNRESTRICTED
47 #define PROTECTION_LEVEL_UNRESTRICTED 10
49 #ifndef IPV6_PROTECTION_LEVEL
50 #define IPV6_PROTECTION_LEVEL 23
57 const int MAX_OUTBOUND_CONNECTIONS = 8;
63 ListenSocket(SOCKET socket, bool whitelisted) : socket(socket), whitelisted(whitelisted) {}
68 // Global state variables
70 bool fDiscover = true;
72 uint64_t nLocalServices = NODE_NETWORK;
73 CCriticalSection cs_mapLocalHost;
74 map<CNetAddr, LocalServiceInfo> mapLocalHost;
75 static bool vfReachable[NET_MAX] = {};
76 static bool vfLimited[NET_MAX] = {};
77 static CNode* pnodeLocalHost = NULL;
78 uint64_t nLocalHostNonce = 0;
79 static std::vector<ListenSocket> vhListenSocket;
81 int nMaxConnections = 125;
82 bool fAddressesInitialized = false;
84 vector<CNode*> vNodes;
85 CCriticalSection cs_vNodes;
86 map<CInv, CDataStream> mapRelay;
87 deque<pair<int64_t, CInv> > vRelayExpiration;
88 CCriticalSection cs_mapRelay;
89 limitedmap<CInv, int64_t> mapAlreadyAskedFor(MAX_INV_SZ);
91 static deque<string> vOneShots;
92 CCriticalSection cs_vOneShots;
94 set<CNetAddr> setservAddNodeAddresses;
95 CCriticalSection cs_setservAddNodeAddresses;
97 vector<std::string> vAddedNodes;
98 CCriticalSection cs_vAddedNodes;
100 NodeId nLastNodeId = 0;
101 CCriticalSection cs_nLastNodeId;
103 static CSemaphore *semOutbound = NULL;
104 boost::condition_variable messageHandlerCondition;
106 // Signals for message handling
107 static CNodeSignals g_signals;
108 CNodeSignals& GetNodeSignals() { return g_signals; }
110 void AddOneShot(string strDest)
113 vOneShots.push_back(strDest);
116 unsigned short GetListenPort()
118 return (unsigned short)(GetArg("-port", Params().GetDefaultPort()));
121 // find 'best' local address for a particular peer
122 bool GetLocal(CService& addr, const CNetAddr *paddrPeer)
128 int nBestReachability = -1;
130 LOCK(cs_mapLocalHost);
131 for (map<CNetAddr, LocalServiceInfo>::iterator it = mapLocalHost.begin(); it != mapLocalHost.end(); it++)
133 int nScore = (*it).second.nScore;
134 int nReachability = (*it).first.GetReachabilityFrom(paddrPeer);
135 if (nReachability > nBestReachability || (nReachability == nBestReachability && nScore > nBestScore))
137 addr = CService((*it).first, (*it).second.nPort);
138 nBestReachability = nReachability;
143 return nBestScore >= 0;
146 //! Convert the pnSeeds6 array into usable address objects.
147 static std::vector<CAddress> convertSeed6(const std::vector<SeedSpec6> &vSeedsIn)
149 // It'll only connect to one or two seed nodes because once it connects,
150 // it'll get a pile of addresses with newer timestamps.
151 // Seed nodes are given a random 'last seen time' of between one and two
153 const int64_t nOneWeek = 7*24*60*60;
154 std::vector<CAddress> vSeedsOut;
155 vSeedsOut.reserve(vSeedsIn.size());
156 for (std::vector<SeedSpec6>::const_iterator i(vSeedsIn.begin()); i != vSeedsIn.end(); ++i)
159 memcpy(&ip, i->addr, sizeof(ip));
160 CAddress addr(CService(ip, i->port));
161 addr.nTime = GetTime() - GetRand(nOneWeek) - nOneWeek;
162 vSeedsOut.push_back(addr);
167 // get best local address for a particular peer as a CAddress
168 // Otherwise, return the unroutable 0.0.0.0 but filled in with
169 // the normal parameters, since the IP may be changed to a useful
171 CAddress GetLocalAddress(const CNetAddr *paddrPeer)
173 CAddress ret(CService("0.0.0.0",GetListenPort()),0);
175 if (GetLocal(addr, paddrPeer))
177 ret = CAddress(addr);
179 ret.nServices = nLocalServices;
180 ret.nTime = GetAdjustedTime();
184 int GetnScore(const CService& addr)
186 LOCK(cs_mapLocalHost);
187 if (mapLocalHost.count(addr) == LOCAL_NONE)
189 return mapLocalHost[addr].nScore;
192 // Is our peer's addrLocal potentially useful as an external IP source?
193 bool IsPeerAddrLocalGood(CNode *pnode)
195 return fDiscover && pnode->addr.IsRoutable() && pnode->addrLocal.IsRoutable() &&
196 !IsLimited(pnode->addrLocal.GetNetwork());
199 // pushes our own address to a peer
200 void AdvertizeLocal(CNode *pnode)
202 if (fListen && pnode->fSuccessfullyConnected)
204 CAddress addrLocal = GetLocalAddress(&pnode->addr);
205 // If discovery is enabled, sometimes give our peer the address it
206 // tells us that it sees us as in case it has a better idea of our
207 // address than we do.
208 if (IsPeerAddrLocalGood(pnode) && (!addrLocal.IsRoutable() ||
209 GetRand((GetnScore(addrLocal) > LOCAL_MANUAL) ? 8:2) == 0))
211 addrLocal.SetIP(pnode->addrLocal);
213 if (addrLocal.IsRoutable())
215 pnode->PushAddress(addrLocal);
220 void SetReachable(enum Network net, bool fFlag)
222 LOCK(cs_mapLocalHost);
223 vfReachable[net] = fFlag;
224 if (net == NET_IPV6 && fFlag)
225 vfReachable[NET_IPV4] = true;
228 // learn a new local address
229 bool AddLocal(const CService& addr, int nScore)
231 if (!addr.IsRoutable())
234 if (!fDiscover && nScore < LOCAL_MANUAL)
240 LogPrintf("AddLocal(%s,%i)\n", addr.ToString(), nScore);
243 LOCK(cs_mapLocalHost);
244 bool fAlready = mapLocalHost.count(addr) > 0;
245 LocalServiceInfo &info = mapLocalHost[addr];
246 if (!fAlready || nScore >= info.nScore) {
247 info.nScore = nScore + (fAlready ? 1 : 0);
248 info.nPort = addr.GetPort();
250 SetReachable(addr.GetNetwork());
256 bool AddLocal(const CNetAddr &addr, int nScore)
258 return AddLocal(CService(addr, GetListenPort()), nScore);
261 /** Make a particular network entirely off-limits (no automatic connects to it) */
262 void SetLimited(enum Network net, bool fLimited)
264 if (net == NET_UNROUTABLE)
266 LOCK(cs_mapLocalHost);
267 vfLimited[net] = fLimited;
270 bool IsLimited(enum Network net)
272 LOCK(cs_mapLocalHost);
273 return vfLimited[net];
276 bool IsLimited(const CNetAddr &addr)
278 return IsLimited(addr.GetNetwork());
281 /** vote for a local address */
282 bool SeenLocal(const CService& addr)
285 LOCK(cs_mapLocalHost);
286 if (mapLocalHost.count(addr) == 0)
288 mapLocalHost[addr].nScore++;
294 /** check whether a given address is potentially local */
295 bool IsLocal(const CService& addr)
297 LOCK(cs_mapLocalHost);
298 return mapLocalHost.count(addr) > 0;
301 /** check whether a given network is one we can probably connect to */
302 bool IsReachable(enum Network net)
304 LOCK(cs_mapLocalHost);
305 return vfReachable[net] && !vfLimited[net];
308 /** check whether a given address is in a network we can probably connect to */
309 bool IsReachable(const CNetAddr& addr)
311 enum Network net = addr.GetNetwork();
312 return IsReachable(net);
315 void AddressCurrentlyConnected(const CService& addr)
317 addrman.Connected(addr);
321 uint64_t CNode::nTotalBytesRecv = 0;
322 uint64_t CNode::nTotalBytesSent = 0;
323 CCriticalSection CNode::cs_totalBytesRecv;
324 CCriticalSection CNode::cs_totalBytesSent;
326 CNode* FindNode(const CNetAddr& ip)
329 BOOST_FOREACH(CNode* pnode, vNodes)
330 if ((CNetAddr)pnode->addr == ip)
335 CNode* FindNode(const std::string& addrName)
338 BOOST_FOREACH(CNode* pnode, vNodes)
339 if (pnode->addrName == addrName)
344 CNode* FindNode(const CService& addr)
347 BOOST_FOREACH(CNode* pnode, vNodes)
348 if ((CService)pnode->addr == addr)
353 CNode* ConnectNode(CAddress addrConnect, const char *pszDest)
355 if (pszDest == NULL) {
356 if (IsLocal(addrConnect))
359 // Look for an existing connection
360 CNode* pnode = FindNode((CService)addrConnect);
369 LogPrint("net", "trying connection %s lastseen=%.1fhrs\n",
370 pszDest ? pszDest : addrConnect.ToString(),
371 pszDest ? 0.0 : (double)(GetAdjustedTime() - addrConnect.nTime)/3600.0);
375 bool proxyConnectionFailed = false;
376 if (pszDest ? ConnectSocketByName(addrConnect, hSocket, pszDest, Params().GetDefaultPort(), nConnectTimeout, &proxyConnectionFailed) :
377 ConnectSocket(addrConnect, hSocket, nConnectTimeout, &proxyConnectionFailed))
379 if (!IsSelectableSocket(hSocket)) {
380 LogPrintf("Cannot create connection: non-selectable socket created (fd >= FD_SETSIZE ?)\n");
381 CloseSocket(hSocket);
385 addrman.Attempt(addrConnect);
388 CNode* pnode = new CNode(hSocket, addrConnect, pszDest ? pszDest : "", false);
393 vNodes.push_back(pnode);
396 pnode->nTimeConnected = GetTime();
399 } else if (!proxyConnectionFailed) {
400 // If connecting to the node failed, and failure is not caused by a problem connecting to
401 // the proxy, mark this as an attempt.
402 addrman.Attempt(addrConnect);
408 void CNode::CloseSocketDisconnect()
411 if (hSocket != INVALID_SOCKET)
413 LogPrint("net", "disconnecting peer=%d\n", id);
414 CloseSocket(hSocket);
417 // in case this fails, we'll empty the recv buffer when the CNode is deleted
418 TRY_LOCK(cs_vRecvMsg, lockRecv);
423 void CNode::PushVersion()
425 int nBestHeight = g_signals.GetHeight().get_value_or(0);
427 int64_t nTime = (fInbound ? GetAdjustedTime() : GetTime());
428 CAddress addrYou = (addr.IsRoutable() && !IsProxy(addr) ? addr : CAddress(CService("0.0.0.0",0)));
429 CAddress addrMe = GetLocalAddress(&addr);
430 GetRandBytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
432 LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), addrYou.ToString(), id);
434 LogPrint("net", "send version message: version %d, blocks=%d, us=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), id);
435 PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
436 nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, std::vector<string>()), nBestHeight, true);
443 std::map<CNetAddr, int64_t> CNode::setBanned;
444 CCriticalSection CNode::cs_setBanned;
446 void CNode::ClearBanned()
451 bool CNode::IsBanned(CNetAddr ip)
453 bool fResult = false;
456 std::map<CNetAddr, int64_t>::iterator i = setBanned.find(ip);
457 if (i != setBanned.end())
459 int64_t t = (*i).second;
467 bool CNode::Ban(const CNetAddr &addr) {
468 int64_t banTime = GetTime()+GetArg("-bantime", 60*60*24); // Default 24-hour ban
471 if (setBanned[addr] < banTime)
472 setBanned[addr] = banTime;
478 std::vector<CSubNet> CNode::vWhitelistedRange;
479 CCriticalSection CNode::cs_vWhitelistedRange;
481 bool CNode::IsWhitelistedRange(const CNetAddr &addr) {
482 LOCK(cs_vWhitelistedRange);
483 BOOST_FOREACH(const CSubNet& subnet, vWhitelistedRange) {
484 if (subnet.Match(addr))
490 void CNode::AddWhitelistedRange(const CSubNet &subnet) {
491 LOCK(cs_vWhitelistedRange);
492 vWhitelistedRange.push_back(subnet);
496 #define X(name) stats.name = name
497 void CNode::copyStats(CNodeStats &stats)
499 stats.nodeid = this->GetId();
514 // It is common for nodes with good ping times to suddenly become lagged,
515 // due to a new block arriving or other large transfer.
516 // Merely reporting pingtime might fool the caller into thinking the node was still responsive,
517 // since pingtime does not update until the ping is complete, which might take a while.
518 // So, if a ping is taking an unusually long time in flight,
519 // the caller can immediately detect that this is happening.
520 int64_t nPingUsecWait = 0;
521 if ((0 != nPingNonceSent) && (0 != nPingUsecStart)) {
522 nPingUsecWait = GetTimeMicros() - nPingUsecStart;
525 // 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 :)
526 stats.dPingTime = (((double)nPingUsecTime) / 1e6);
527 stats.dPingWait = (((double)nPingUsecWait) / 1e6);
529 // Leave string empty if addrLocal invalid (not filled in yet)
530 stats.addrLocal = addrLocal.IsValid() ? addrLocal.ToString() : "";
534 // requires LOCK(cs_vRecvMsg)
535 bool CNode::ReceiveMsgBytes(const char *pch, unsigned int nBytes)
539 // get current incomplete message, or create a new one
540 if (vRecvMsg.empty() ||
541 vRecvMsg.back().complete())
542 vRecvMsg.push_back(CNetMessage(Params().MessageStart(), SER_NETWORK, nRecvVersion));
544 CNetMessage& msg = vRecvMsg.back();
546 // absorb network data
549 handled = msg.readHeader(pch, nBytes);
551 handled = msg.readData(pch, nBytes);
556 if (msg.in_data && msg.hdr.nMessageSize > MAX_PROTOCOL_MESSAGE_LENGTH) {
557 LogPrint("net", "Oversized message from peer=%i, disconnecting\n", GetId());
564 if (msg.complete()) {
565 msg.nTime = GetTimeMicros();
566 messageHandlerCondition.notify_one();
573 int CNetMessage::readHeader(const char *pch, unsigned int nBytes)
575 // copy data to temporary parsing buffer
576 unsigned int nRemaining = 24 - nHdrPos;
577 unsigned int nCopy = std::min(nRemaining, nBytes);
579 memcpy(&hdrbuf[nHdrPos], pch, nCopy);
582 // if header incomplete, exit
586 // deserialize to CMessageHeader
590 catch (const std::exception&) {
594 // reject messages larger than MAX_SIZE
595 if (hdr.nMessageSize > MAX_SIZE)
598 // switch state to reading message data
604 int CNetMessage::readData(const char *pch, unsigned int nBytes)
606 unsigned int nRemaining = hdr.nMessageSize - nDataPos;
607 unsigned int nCopy = std::min(nRemaining, nBytes);
609 if (vRecv.size() < nDataPos + nCopy) {
610 // Allocate up to 256 KiB ahead, but never more than the total message size.
611 vRecv.resize(std::min(hdr.nMessageSize, nDataPos + nCopy + 256 * 1024));
614 memcpy(&vRecv[nDataPos], pch, nCopy);
628 // requires LOCK(cs_vSend)
629 void SocketSendData(CNode *pnode)
631 std::deque<CSerializeData>::iterator it = pnode->vSendMsg.begin();
633 while (it != pnode->vSendMsg.end()) {
634 const CSerializeData &data = *it;
635 assert(data.size() > pnode->nSendOffset);
636 int nBytes = send(pnode->hSocket, &data[pnode->nSendOffset], data.size() - pnode->nSendOffset, MSG_NOSIGNAL | MSG_DONTWAIT);
638 pnode->nLastSend = GetTime();
639 pnode->nSendBytes += nBytes;
640 pnode->nSendOffset += nBytes;
641 pnode->RecordBytesSent(nBytes);
642 if (pnode->nSendOffset == data.size()) {
643 pnode->nSendOffset = 0;
644 pnode->nSendSize -= data.size();
647 // could not send full message; stop sending more
653 int nErr = WSAGetLastError();
654 if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
656 LogPrintf("socket send error %s\n", NetworkErrorString(nErr));
657 pnode->CloseSocketDisconnect();
660 // couldn't send anything at all
665 if (it == pnode->vSendMsg.end()) {
666 assert(pnode->nSendOffset == 0);
667 assert(pnode->nSendSize == 0);
669 pnode->vSendMsg.erase(pnode->vSendMsg.begin(), it);
672 static list<CNode*> vNodesDisconnected;
674 void ThreadSocketHandler()
676 unsigned int nPrevNodeCount = 0;
684 // Disconnect unused nodes
685 vector<CNode*> vNodesCopy = vNodes;
686 BOOST_FOREACH(CNode* pnode, vNodesCopy)
688 if (pnode->fDisconnect ||
689 (pnode->GetRefCount() <= 0 && pnode->vRecvMsg.empty() && pnode->nSendSize == 0 && pnode->ssSend.empty()))
691 // remove from vNodes
692 vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
694 // release outbound grant (if any)
695 pnode->grantOutbound.Release();
697 // close socket and cleanup
698 pnode->CloseSocketDisconnect();
700 // hold in disconnected pool until all refs are released
701 if (pnode->fNetworkNode || pnode->fInbound)
703 vNodesDisconnected.push_back(pnode);
708 // Delete disconnected nodes
709 list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
710 BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy)
712 // wait until threads are done using it
713 if (pnode->GetRefCount() <= 0)
715 bool fDelete = false;
717 TRY_LOCK(pnode->cs_vSend, lockSend);
720 TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
723 TRY_LOCK(pnode->cs_inventory, lockInv);
731 vNodesDisconnected.remove(pnode);
737 if(vNodes.size() != nPrevNodeCount) {
738 nPrevNodeCount = vNodes.size();
739 uiInterface.NotifyNumConnectionsChanged(nPrevNodeCount);
743 // Find which sockets have data to receive
745 struct timeval timeout;
747 timeout.tv_usec = 50000; // frequency to poll pnode->vSend
754 FD_ZERO(&fdsetError);
755 SOCKET hSocketMax = 0;
756 bool have_fds = false;
758 BOOST_FOREACH(const ListenSocket& hListenSocket, vhListenSocket) {
759 FD_SET(hListenSocket.socket, &fdsetRecv);
760 hSocketMax = max(hSocketMax, hListenSocket.socket);
766 BOOST_FOREACH(CNode* pnode, vNodes)
768 if (pnode->hSocket == INVALID_SOCKET)
770 FD_SET(pnode->hSocket, &fdsetError);
771 hSocketMax = max(hSocketMax, pnode->hSocket);
774 // Implement the following logic:
775 // * If there is data to send, select() for sending data. As this only
776 // happens when optimistic write failed, we choose to first drain the
777 // write buffer in this case before receiving more. This avoids
778 // needlessly queueing received data, if the remote peer is not themselves
779 // receiving data. This means properly utilizing TCP flow control signalling.
780 // * Otherwise, if there is no (complete) message in the receive buffer,
781 // or there is space left in the buffer, select() for receiving data.
782 // * (if neither of the above applies, there is certainly one message
783 // in the receiver buffer ready to be processed).
784 // Together, that means that at least one of the following is always possible,
785 // so we don't deadlock:
786 // * We send some data.
787 // * We wait for data to be received (and disconnect after timeout).
788 // * We process a message in the buffer (message handler thread).
790 TRY_LOCK(pnode->cs_vSend, lockSend);
791 if (lockSend && !pnode->vSendMsg.empty()) {
792 FD_SET(pnode->hSocket, &fdsetSend);
797 TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
799 pnode->vRecvMsg.empty() || !pnode->vRecvMsg.front().complete() ||
800 pnode->GetTotalRecvSize() <= ReceiveFloodSize()))
801 FD_SET(pnode->hSocket, &fdsetRecv);
806 int nSelect = select(have_fds ? hSocketMax + 1 : 0,
807 &fdsetRecv, &fdsetSend, &fdsetError, &timeout);
808 boost::this_thread::interruption_point();
810 if (nSelect == SOCKET_ERROR)
814 int nErr = WSAGetLastError();
815 LogPrintf("socket select error %s\n", NetworkErrorString(nErr));
816 for (unsigned int i = 0; i <= hSocketMax; i++)
817 FD_SET(i, &fdsetRecv);
820 FD_ZERO(&fdsetError);
821 MilliSleep(timeout.tv_usec/1000);
825 // Accept new connections
827 BOOST_FOREACH(const ListenSocket& hListenSocket, vhListenSocket)
829 if (hListenSocket.socket != INVALID_SOCKET && FD_ISSET(hListenSocket.socket, &fdsetRecv))
831 struct sockaddr_storage sockaddr;
832 socklen_t len = sizeof(sockaddr);
833 SOCKET hSocket = accept(hListenSocket.socket, (struct sockaddr*)&sockaddr, &len);
837 if (hSocket != INVALID_SOCKET)
838 if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr))
839 LogPrintf("Warning: Unknown socket family\n");
841 bool whitelisted = hListenSocket.whitelisted || CNode::IsWhitelistedRange(addr);
844 BOOST_FOREACH(CNode* pnode, vNodes)
849 if (hSocket == INVALID_SOCKET)
851 int nErr = WSAGetLastError();
852 if (nErr != WSAEWOULDBLOCK)
853 LogPrintf("socket error accept failed: %s\n", NetworkErrorString(nErr));
855 else if (!IsSelectableSocket(hSocket))
857 LogPrintf("connection from %s dropped: non-selectable socket\n", addr.ToString());
858 CloseSocket(hSocket);
860 else if (nInbound >= nMaxConnections - MAX_OUTBOUND_CONNECTIONS)
862 LogPrint("net", "connection from %s dropped (full)\n", addr.ToString());
863 CloseSocket(hSocket);
865 else if (CNode::IsBanned(addr) && !whitelisted)
867 LogPrintf("connection from %s dropped (banned)\n", addr.ToString());
868 CloseSocket(hSocket);
872 CNode* pnode = new CNode(hSocket, addr, "", true);
874 pnode->fWhitelisted = whitelisted;
878 vNodes.push_back(pnode);
885 // Service each socket
887 vector<CNode*> vNodesCopy;
891 BOOST_FOREACH(CNode* pnode, vNodesCopy)
894 BOOST_FOREACH(CNode* pnode, vNodesCopy)
896 boost::this_thread::interruption_point();
901 if (pnode->hSocket == INVALID_SOCKET)
903 if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
905 TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
909 // typical socket buffer is 8K-64K
910 char pchBuf[0x10000];
911 int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
914 if (!pnode->ReceiveMsgBytes(pchBuf, nBytes))
915 pnode->CloseSocketDisconnect();
916 pnode->nLastRecv = GetTime();
917 pnode->nRecvBytes += nBytes;
918 pnode->RecordBytesRecv(nBytes);
920 else if (nBytes == 0)
922 // socket closed gracefully
923 if (!pnode->fDisconnect)
924 LogPrint("net", "socket closed\n");
925 pnode->CloseSocketDisconnect();
930 int nErr = WSAGetLastError();
931 if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
933 if (!pnode->fDisconnect)
934 LogPrintf("socket recv error %s\n", NetworkErrorString(nErr));
935 pnode->CloseSocketDisconnect();
945 if (pnode->hSocket == INVALID_SOCKET)
947 if (FD_ISSET(pnode->hSocket, &fdsetSend))
949 TRY_LOCK(pnode->cs_vSend, lockSend);
951 SocketSendData(pnode);
955 // Inactivity checking
957 int64_t nTime = GetTime();
958 if (nTime - pnode->nTimeConnected > 60)
960 if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
962 LogPrint("net", "socket no message in first 60 seconds, %d %d from %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0, pnode->id);
963 pnode->fDisconnect = true;
965 else if (nTime - pnode->nLastSend > TIMEOUT_INTERVAL)
967 LogPrintf("socket sending timeout: %is\n", nTime - pnode->nLastSend);
968 pnode->fDisconnect = true;
970 else if (nTime - pnode->nLastRecv > (pnode->nVersion > BIP0031_VERSION ? TIMEOUT_INTERVAL : 90*60))
972 LogPrintf("socket receive timeout: %is\n", nTime - pnode->nLastRecv);
973 pnode->fDisconnect = true;
975 else if (pnode->nPingNonceSent && pnode->nPingUsecStart + TIMEOUT_INTERVAL * 1000000 < GetTimeMicros())
977 LogPrintf("ping timeout: %fs\n", 0.000001 * (GetTimeMicros() - pnode->nPingUsecStart));
978 pnode->fDisconnect = true;
984 BOOST_FOREACH(CNode* pnode, vNodesCopy)
1001 std::string port = strprintf("%u", GetListenPort());
1002 const char * multicastif = 0;
1003 const char * minissdpdpath = 0;
1004 struct UPNPDev * devlist = 0;
1007 #ifndef UPNPDISCOVER_SUCCESS
1009 devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0);
1010 #elif MINIUPNPC_API_VERSION < 14
1013 devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0, 0, &error);
1015 /* miniupnpc 1.9.20150730 */
1017 devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0, 0, 2, &error);
1020 struct UPNPUrls urls;
1021 struct IGDdatas data;
1024 r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
1028 char externalIPAddress[40];
1029 r = UPNP_GetExternalIPAddress(urls.controlURL, data.first.servicetype, externalIPAddress);
1030 if(r != UPNPCOMMAND_SUCCESS)
1031 LogPrintf("UPnP: GetExternalIPAddress() returned %d\n", r);
1034 if(externalIPAddress[0])
1036 LogPrintf("UPnP: ExternalIPAddress = %s\n", externalIPAddress);
1037 AddLocal(CNetAddr(externalIPAddress), LOCAL_UPNP);
1040 LogPrintf("UPnP: GetExternalIPAddress failed.\n");
1044 string strDesc = "Bitcoin " + FormatFullVersion();
1048 #ifndef UPNPDISCOVER_SUCCESS
1050 r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
1051 port.c_str(), port.c_str(), lanaddr, strDesc.c_str(), "TCP", 0);
1054 r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
1055 port.c_str(), port.c_str(), lanaddr, strDesc.c_str(), "TCP", 0, "0");
1058 if(r!=UPNPCOMMAND_SUCCESS)
1059 LogPrintf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
1060 port, port, lanaddr, r, strupnperror(r));
1062 LogPrintf("UPnP Port Mapping successful.\n");;
1064 MilliSleep(20*60*1000); // Refresh every 20 minutes
1067 catch (const boost::thread_interrupted&)
1069 r = UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype, port.c_str(), "TCP", 0);
1070 LogPrintf("UPNP_DeletePortMapping() returned: %d\n", r);
1071 freeUPNPDevlist(devlist); devlist = 0;
1072 FreeUPNPUrls(&urls);
1076 LogPrintf("No valid UPnP IGDs found\n");
1077 freeUPNPDevlist(devlist); devlist = 0;
1079 FreeUPNPUrls(&urls);
1083 void MapPort(bool fUseUPnP)
1085 static boost::thread* upnp_thread = NULL;
1090 upnp_thread->interrupt();
1091 upnp_thread->join();
1094 upnp_thread = new boost::thread(boost::bind(&TraceThread<void (*)()>, "upnp", &ThreadMapPort));
1096 else if (upnp_thread) {
1097 upnp_thread->interrupt();
1098 upnp_thread->join();
1107 // Intentionally left blank.
1116 void ThreadDNSAddressSeed()
1118 // goal: only query DNS seeds if address need is acute
1119 if ((addrman.size() > 0) &&
1120 (!GetBoolArg("-forcednsseed", false))) {
1121 MilliSleep(11 * 1000);
1124 if (vNodes.size() >= 2) {
1125 LogPrintf("P2P peers available. Skipped DNS seeding.\n");
1130 const vector<CDNSSeedData> &vSeeds = Params().DNSSeeds();
1133 LogPrintf("Loading addresses from DNS seeds (could take a while)\n");
1135 BOOST_FOREACH(const CDNSSeedData &seed, vSeeds) {
1136 if (HaveNameProxy()) {
1137 AddOneShot(seed.host);
1139 vector<CNetAddr> vIPs;
1140 vector<CAddress> vAdd;
1141 if (LookupHost(seed.host.c_str(), vIPs))
1143 BOOST_FOREACH(CNetAddr& ip, vIPs)
1145 int nOneDay = 24*3600;
1146 CAddress addr = CAddress(CService(ip, Params().GetDefaultPort()));
1147 addr.nTime = GetTime() - 3*nOneDay - GetRand(4*nOneDay); // use a random age between 3 and 7 days old
1148 vAdd.push_back(addr);
1152 addrman.Add(vAdd, CNetAddr(seed.name, true));
1156 LogPrintf("%d addresses found from DNS seeds\n", found);
1170 void DumpAddresses()
1172 int64_t nStart = GetTimeMillis();
1177 LogPrint("net", "Flushed %d addresses to peers.dat %dms\n",
1178 addrman.size(), GetTimeMillis() - nStart);
1181 void static ProcessOneShot()
1186 if (vOneShots.empty())
1188 strDest = vOneShots.front();
1189 vOneShots.pop_front();
1192 CSemaphoreGrant grant(*semOutbound, true);
1194 if (!OpenNetworkConnection(addr, &grant, strDest.c_str(), true))
1195 AddOneShot(strDest);
1199 void ThreadOpenConnections()
1201 // Connect to specific addresses
1202 if (mapArgs.count("-connect") && mapMultiArgs["-connect"].size() > 0)
1204 for (int64_t nLoop = 0;; nLoop++)
1207 BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
1210 OpenNetworkConnection(addr, NULL, strAddr.c_str());
1211 for (int i = 0; i < 10 && i < nLoop; i++)
1220 // Initiate network connections
1221 int64_t nStart = GetTime();
1228 CSemaphoreGrant grant(*semOutbound);
1229 boost::this_thread::interruption_point();
1231 // Add seed nodes if DNS seeds are all down (an infrastructure attack?).
1232 if (addrman.size() == 0 && (GetTime() - nStart > 60)) {
1233 static bool done = false;
1235 LogPrintf("Adding fixed seed nodes as DNS doesn't seem to be available.\n");
1236 addrman.Add(convertSeed6(Params().FixedSeeds()), CNetAddr("127.0.0.1"));
1242 // Choose an address to connect to based on most recently seen
1244 CAddress addrConnect;
1246 // Only connect out to one peer per network group (/16 for IPv4).
1247 // Do this here so we don't have to critsect vNodes inside mapAddresses critsect.
1249 set<vector<unsigned char> > setConnected;
1252 BOOST_FOREACH(CNode* pnode, vNodes) {
1253 if (!pnode->fInbound) {
1254 setConnected.insert(pnode->addr.GetGroup());
1260 int64_t nANow = GetAdjustedTime();
1265 CAddrInfo addr = addrman.Select();
1267 // if we selected an invalid address, restart
1268 if (!addr.IsValid() || setConnected.count(addr.GetGroup()) || IsLocal(addr))
1271 // If we didn't find an appropriate destination after trying 100 addresses fetched from addrman,
1272 // stop this loop, and let the outer loop run again (which sleeps, adds seed nodes, recalculates
1273 // already-connected network ranges, ...) before trying new addrman addresses.
1278 if (IsLimited(addr))
1281 // only consider very recently tried nodes after 30 failed attempts
1282 if (nANow - addr.nLastTry < 600 && nTries < 30)
1285 // do not allow non-default ports, unless after 50 invalid addresses selected already
1286 if (addr.GetPort() != Params().GetDefaultPort() && nTries < 50)
1293 if (addrConnect.IsValid())
1294 OpenNetworkConnection(addrConnect, &grant);
1298 void ThreadOpenAddedConnections()
1301 LOCK(cs_vAddedNodes);
1302 vAddedNodes = mapMultiArgs["-addnode"];
1305 if (HaveNameProxy()) {
1307 list<string> lAddresses(0);
1309 LOCK(cs_vAddedNodes);
1310 BOOST_FOREACH(string& strAddNode, vAddedNodes)
1311 lAddresses.push_back(strAddNode);
1313 BOOST_FOREACH(string& strAddNode, lAddresses) {
1315 CSemaphoreGrant grant(*semOutbound);
1316 OpenNetworkConnection(addr, &grant, strAddNode.c_str());
1319 MilliSleep(120000); // Retry every 2 minutes
1323 for (unsigned int i = 0; true; i++)
1325 list<string> lAddresses(0);
1327 LOCK(cs_vAddedNodes);
1328 BOOST_FOREACH(string& strAddNode, vAddedNodes)
1329 lAddresses.push_back(strAddNode);
1332 list<vector<CService> > lservAddressesToAdd(0);
1333 BOOST_FOREACH(string& strAddNode, lAddresses)
1335 vector<CService> vservNode(0);
1336 if(Lookup(strAddNode.c_str(), vservNode, Params().GetDefaultPort(), fNameLookup, 0))
1338 lservAddressesToAdd.push_back(vservNode);
1340 LOCK(cs_setservAddNodeAddresses);
1341 BOOST_FOREACH(CService& serv, vservNode)
1342 setservAddNodeAddresses.insert(serv);
1346 // Attempt to connect to each IP for each addnode entry until at least one is successful per addnode entry
1347 // (keeping in mind that addnode entries can have many IPs if fNameLookup)
1350 BOOST_FOREACH(CNode* pnode, vNodes)
1351 for (list<vector<CService> >::iterator it = lservAddressesToAdd.begin(); it != lservAddressesToAdd.end(); it++)
1352 BOOST_FOREACH(CService& addrNode, *(it))
1353 if (pnode->addr == addrNode)
1355 it = lservAddressesToAdd.erase(it);
1360 BOOST_FOREACH(vector<CService>& vserv, lservAddressesToAdd)
1362 CSemaphoreGrant grant(*semOutbound);
1363 OpenNetworkConnection(CAddress(vserv[i % vserv.size()]), &grant);
1366 MilliSleep(120000); // Retry every 2 minutes
1370 // if successful, this moves the passed grant to the constructed node
1371 bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOutbound, const char *pszDest, bool fOneShot)
1374 // Initiate outbound network connection
1376 boost::this_thread::interruption_point();
1378 if (IsLocal(addrConnect) ||
1379 FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect) ||
1380 FindNode(addrConnect.ToStringIPPort()))
1382 } else if (FindNode(std::string(pszDest)))
1385 CNode* pnode = ConnectNode(addrConnect, pszDest);
1386 boost::this_thread::interruption_point();
1391 grantOutbound->MoveTo(pnode->grantOutbound);
1392 pnode->fNetworkNode = true;
1394 pnode->fOneShot = true;
1400 void ThreadMessageHandler()
1402 boost::mutex condition_mutex;
1403 boost::unique_lock<boost::mutex> lock(condition_mutex);
1405 SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
1408 vector<CNode*> vNodesCopy;
1411 vNodesCopy = vNodes;
1412 BOOST_FOREACH(CNode* pnode, vNodesCopy) {
1417 // Poll the connected nodes for messages
1418 CNode* pnodeTrickle = NULL;
1419 if (!vNodesCopy.empty())
1420 pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
1424 BOOST_FOREACH(CNode* pnode, vNodesCopy)
1426 if (pnode->fDisconnect)
1431 TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
1434 if (!g_signals.ProcessMessages(pnode))
1435 pnode->CloseSocketDisconnect();
1437 if (pnode->nSendSize < SendBufferSize())
1439 if (!pnode->vRecvGetData.empty() || (!pnode->vRecvMsg.empty() && pnode->vRecvMsg[0].complete()))
1446 boost::this_thread::interruption_point();
1450 TRY_LOCK(pnode->cs_vSend, lockSend);
1452 g_signals.SendMessages(pnode, pnode == pnodeTrickle || pnode->fWhitelisted);
1454 boost::this_thread::interruption_point();
1459 BOOST_FOREACH(CNode* pnode, vNodesCopy)
1464 messageHandlerCondition.timed_wait(lock, boost::posix_time::microsec_clock::universal_time() + boost::posix_time::milliseconds(100));
1473 bool BindListenPort(const CService &addrBind, string& strError, bool fWhitelisted)
1478 // Create socket for listening for incoming connections
1479 struct sockaddr_storage sockaddr;
1480 socklen_t len = sizeof(sockaddr);
1481 if (!addrBind.GetSockAddr((struct sockaddr*)&sockaddr, &len))
1483 strError = strprintf("Error: Bind address family for %s not supported", addrBind.ToString());
1484 LogPrintf("%s\n", strError);
1488 SOCKET hListenSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
1489 if (hListenSocket == INVALID_SOCKET)
1491 strError = strprintf("Error: Couldn't open socket for incoming connections (socket returned error %s)", NetworkErrorString(WSAGetLastError()));
1492 LogPrintf("%s\n", strError);
1495 if (!IsSelectableSocket(hListenSocket))
1497 strError = "Error: Couldn't create a listenable socket for incoming connections";
1498 LogPrintf("%s\n", strError);
1505 // Different way of disabling SIGPIPE on BSD
1506 setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
1508 // Allow binding if the port is still in TIME_WAIT state after
1509 // the program was closed and restarted.
1510 setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int));
1512 setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (const char*)&nOne, sizeof(int));
1515 // Set to non-blocking, incoming connections will also inherit this
1516 if (!SetSocketNonBlocking(hListenSocket, true)) {
1517 strError = strprintf("BindListenPort: Setting listening socket to non-blocking failed, error %s\n", NetworkErrorString(WSAGetLastError()));
1518 LogPrintf("%s\n", strError);
1522 // some systems don't have IPV6_V6ONLY but are always v6only; others do have the option
1523 // and enable it by default or not. Try to enable it, if possible.
1524 if (addrBind.IsIPv6()) {
1527 setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&nOne, sizeof(int));
1529 setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&nOne, sizeof(int));
1533 int nProtLevel = PROTECTION_LEVEL_UNRESTRICTED;
1534 setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL, (const char*)&nProtLevel, sizeof(int));
1538 if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
1540 int nErr = WSAGetLastError();
1541 if (nErr == WSAEADDRINUSE)
1542 strError = strprintf(_("Unable to bind to %s on this computer. Bitcoin Core is probably already running."), addrBind.ToString());
1544 strError = strprintf(_("Unable to bind to %s on this computer (bind returned error %s)"), addrBind.ToString(), NetworkErrorString(nErr));
1545 LogPrintf("%s\n", strError);
1546 CloseSocket(hListenSocket);
1549 LogPrintf("Bound to %s\n", addrBind.ToString());
1551 // Listen for incoming connections
1552 if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR)
1554 strError = strprintf(_("Error: Listening for incoming connections failed (listen returned error %s)"), NetworkErrorString(WSAGetLastError()));
1555 LogPrintf("%s\n", strError);
1556 CloseSocket(hListenSocket);
1560 vhListenSocket.push_back(ListenSocket(hListenSocket, fWhitelisted));
1562 if (addrBind.IsRoutable() && fDiscover && !fWhitelisted)
1563 AddLocal(addrBind, LOCAL_BIND);
1568 void static Discover(boost::thread_group& threadGroup)
1574 // Get local host IP
1575 char pszHostName[256] = "";
1576 if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR)
1578 vector<CNetAddr> vaddr;
1579 if (LookupHost(pszHostName, vaddr))
1581 BOOST_FOREACH (const CNetAddr &addr, vaddr)
1583 if (AddLocal(addr, LOCAL_IF))
1584 LogPrintf("%s: %s - %s\n", __func__, pszHostName, addr.ToString());
1589 // Get local host ip
1590 struct ifaddrs* myaddrs;
1591 if (getifaddrs(&myaddrs) == 0)
1593 for (struct ifaddrs* ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next)
1595 if (ifa->ifa_addr == NULL) continue;
1596 if ((ifa->ifa_flags & IFF_UP) == 0) continue;
1597 if (strcmp(ifa->ifa_name, "lo") == 0) continue;
1598 if (strcmp(ifa->ifa_name, "lo0") == 0) continue;
1599 if (ifa->ifa_addr->sa_family == AF_INET)
1601 struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr);
1602 CNetAddr addr(s4->sin_addr);
1603 if (AddLocal(addr, LOCAL_IF))
1604 LogPrintf("%s: IPv4 %s: %s\n", __func__, ifa->ifa_name, addr.ToString());
1606 else if (ifa->ifa_addr->sa_family == AF_INET6)
1608 struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr);
1609 CNetAddr addr(s6->sin6_addr);
1610 if (AddLocal(addr, LOCAL_IF))
1611 LogPrintf("%s: IPv6 %s: %s\n", __func__, ifa->ifa_name, addr.ToString());
1614 freeifaddrs(myaddrs);
1619 void StartNode(boost::thread_group& threadGroup, CScheduler& scheduler)
1621 uiInterface.InitMessage(_("Loading addresses..."));
1622 // Load addresses for peers.dat
1623 int64_t nStart = GetTimeMillis();
1626 if (!adb.Read(addrman))
1627 LogPrintf("Invalid or missing peers.dat; recreating\n");
1629 LogPrintf("Loaded %i addresses from peers.dat %dms\n",
1630 addrman.size(), GetTimeMillis() - nStart);
1631 fAddressesInitialized = true;
1633 if (semOutbound == NULL) {
1634 // initialize semaphore
1635 int nMaxOutbound = min(MAX_OUTBOUND_CONNECTIONS, nMaxConnections);
1636 semOutbound = new CSemaphore(nMaxOutbound);
1639 if (pnodeLocalHost == NULL)
1640 pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress(CService("127.0.0.1", 0), nLocalServices));
1642 Discover(threadGroup);
1648 if (!GetBoolArg("-dnsseed", true))
1649 LogPrintf("DNS seeding disabled\n");
1651 threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "dnsseed", &ThreadDNSAddressSeed));
1653 // Map ports with UPnP
1654 MapPort(GetBoolArg("-upnp", DEFAULT_UPNP));
1656 // Send and receive from sockets, accept connections
1657 threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "net", &ThreadSocketHandler));
1659 // Initiate outbound connections from -addnode
1660 threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "addcon", &ThreadOpenAddedConnections));
1662 // Initiate outbound connections
1663 threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "opencon", &ThreadOpenConnections));
1666 threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "msghand", &ThreadMessageHandler));
1668 // Dump network addresses
1669 scheduler.scheduleEvery(&DumpAddresses, DUMP_ADDRESSES_INTERVAL);
1674 LogPrintf("StopNode()\n");
1677 for (int i=0; i<MAX_OUTBOUND_CONNECTIONS; i++)
1678 semOutbound->post();
1680 if (fAddressesInitialized)
1683 fAddressesInitialized = false;
1697 BOOST_FOREACH(CNode* pnode, vNodes)
1698 if (pnode->hSocket != INVALID_SOCKET)
1699 CloseSocket(pnode->hSocket);
1700 BOOST_FOREACH(ListenSocket& hListenSocket, vhListenSocket)
1701 if (hListenSocket.socket != INVALID_SOCKET)
1702 if (!CloseSocket(hListenSocket.socket))
1703 LogPrintf("CloseSocket(hListenSocket) failed with error %s\n", NetworkErrorString(WSAGetLastError()));
1705 // clean up some globals (to help leak detection)
1706 BOOST_FOREACH(CNode *pnode, vNodes)
1708 BOOST_FOREACH(CNode *pnode, vNodesDisconnected)
1711 vNodesDisconnected.clear();
1712 vhListenSocket.clear();
1715 delete pnodeLocalHost;
1716 pnodeLocalHost = NULL;
1719 // Shutdown Windows Sockets
1724 instance_of_cnetcleanup;
1732 void RelayTransaction(const CTransaction& tx)
1734 CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
1737 RelayTransaction(tx, ss);
1740 void RelayTransaction(const CTransaction& tx, const CDataStream& ss)
1742 CInv inv(MSG_TX, tx.GetHash());
1745 // Expire old relay messages
1746 while (!vRelayExpiration.empty() && vRelayExpiration.front().first < GetTime())
1748 mapRelay.erase(vRelayExpiration.front().second);
1749 vRelayExpiration.pop_front();
1752 // Save original serialized message so newer versions are preserved
1753 mapRelay.insert(std::make_pair(inv, ss));
1754 vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, inv));
1757 BOOST_FOREACH(CNode* pnode, vNodes)
1759 if(!pnode->fRelayTxes)
1761 LOCK(pnode->cs_filter);
1764 if (pnode->pfilter->IsRelevantAndUpdate(tx))
1765 pnode->PushInventory(inv);
1767 pnode->PushInventory(inv);
1771 void CNode::RecordBytesRecv(uint64_t bytes)
1773 LOCK(cs_totalBytesRecv);
1774 nTotalBytesRecv += bytes;
1777 void CNode::RecordBytesSent(uint64_t bytes)
1779 LOCK(cs_totalBytesSent);
1780 nTotalBytesSent += bytes;
1783 uint64_t CNode::GetTotalBytesRecv()
1785 LOCK(cs_totalBytesRecv);
1786 return nTotalBytesRecv;
1789 uint64_t CNode::GetTotalBytesSent()
1791 LOCK(cs_totalBytesSent);
1792 return nTotalBytesSent;
1795 void CNode::Fuzz(int nChance)
1797 if (!fSuccessfullyConnected) return; // Don't fuzz initial handshake
1798 if (GetRand(nChance) != 0) return; // Fuzz 1 of every nChance messages
1803 // xor a random byte with a random value:
1804 if (!ssSend.empty()) {
1805 CDataStream::size_type pos = GetRand(ssSend.size());
1806 ssSend[pos] ^= (unsigned char)(GetRand(256));
1810 // delete a random byte:
1811 if (!ssSend.empty()) {
1812 CDataStream::size_type pos = GetRand(ssSend.size());
1813 ssSend.erase(ssSend.begin()+pos);
1817 // insert a random byte at a random position
1819 CDataStream::size_type pos = GetRand(ssSend.size());
1820 char ch = (char)GetRand(256);
1821 ssSend.insert(ssSend.begin()+pos, ch);
1825 // Chance of more than one change half the time:
1826 // (more changes exponentially less likely):
1836 pathAddr = GetDataDir() / "peers.dat";
1839 bool CAddrDB::Write(const CAddrMan& addr)
1841 // Generate random temporary filename
1842 unsigned short randv = 0;
1843 GetRandBytes((unsigned char*)&randv, sizeof(randv));
1844 std::string tmpfn = strprintf("peers.dat.%04x", randv);
1846 // serialize addresses, checksum data up to that point, then append csum
1847 CDataStream ssPeers(SER_DISK, CLIENT_VERSION);
1848 ssPeers << FLATDATA(Params().MessageStart());
1850 uint256 hash = Hash(ssPeers.begin(), ssPeers.end());
1853 // open temp output file, and associate with CAutoFile
1854 boost::filesystem::path pathTmp = GetDataDir() / tmpfn;
1855 FILE *file = fopen(pathTmp.string().c_str(), "wb");
1856 CAutoFile fileout(file, SER_DISK, CLIENT_VERSION);
1857 if (fileout.IsNull())
1858 return error("%s: Failed to open file %s", __func__, pathTmp.string());
1860 // Write and commit header, data
1864 catch (const std::exception& e) {
1865 return error("%s: Serialize or I/O error - %s", __func__, e.what());
1867 FileCommit(fileout.Get());
1870 // replace existing peers.dat, if any, with new peers.dat.XXXX
1871 if (!RenameOver(pathTmp, pathAddr))
1872 return error("%s: Rename-into-place failed", __func__);
1877 bool CAddrDB::Read(CAddrMan& addr)
1879 // open input file, and associate with CAutoFile
1880 FILE *file = fopen(pathAddr.string().c_str(), "rb");
1881 CAutoFile filein(file, SER_DISK, CLIENT_VERSION);
1882 if (filein.IsNull())
1883 return error("%s: Failed to open file %s", __func__, pathAddr.string());
1885 // use file size to size memory buffer
1886 int fileSize = boost::filesystem::file_size(pathAddr);
1887 int dataSize = fileSize - sizeof(uint256);
1888 // Don't try to resize to a negative number if file is small
1891 vector<unsigned char> vchData;
1892 vchData.resize(dataSize);
1895 // read data and checksum from file
1897 filein.read((char *)&vchData[0], dataSize);
1900 catch (const std::exception& e) {
1901 return error("%s: Deserialize or I/O error - %s", __func__, e.what());
1905 CDataStream ssPeers(vchData, SER_DISK, CLIENT_VERSION);
1907 // verify stored checksum matches input data
1908 uint256 hashTmp = Hash(ssPeers.begin(), ssPeers.end());
1909 if (hashIn != hashTmp)
1910 return error("%s: Checksum mismatch, data corrupted", __func__);
1912 unsigned char pchMsgTmp[4];
1914 // de-serialize file header (network specific magic number) and ..
1915 ssPeers >> FLATDATA(pchMsgTmp);
1917 // ... verify the network matches ours
1918 if (memcmp(pchMsgTmp, Params().MessageStart(), sizeof(pchMsgTmp)))
1919 return error("%s: Invalid network magic number", __func__);
1921 // de-serialize address data into one CAddrMan object
1924 catch (const std::exception& e) {
1925 return error("%s: Deserialize or I/O error - %s", __func__, e.what());
1931 unsigned int ReceiveFloodSize() { return 1000*GetArg("-maxreceivebuffer", 5*1000); }
1932 unsigned int SendBufferSize() { return 1000*GetArg("-maxsendbuffer", 1*1000); }
1934 CNode::CNode(SOCKET hSocketIn, CAddress addrIn, std::string addrNameIn, bool fInboundIn) :
1935 ssSend(SER_NETWORK, INIT_PROTO_VERSION),
1936 addrKnown(5000, 0.001),
1937 setInventoryKnown(SendBufferSize() / 1000)
1940 hSocket = hSocketIn;
1941 nRecvVersion = INIT_PROTO_VERSION;
1946 nTimeConnected = GetTime();
1949 addrName = addrNameIn == "" ? addr.ToStringIPPort() : addrNameIn;
1952 fWhitelisted = false;
1954 fClient = false; // set by version message
1955 fInbound = fInboundIn;
1956 fNetworkNode = false;
1957 fSuccessfullyConnected = false;
1958 fDisconnect = false;
1962 hashContinue = uint256();
1963 nStartingHeight = -1;
1966 pfilter = new CBloomFilter();
1970 fPingQueued = false;
1973 LOCK(cs_nLastNodeId);
1978 LogPrint("net", "Added connection to %s peer=%d\n", addrName, id);
1980 LogPrint("net", "Added connection peer=%d\n", id);
1982 // Be shy and don't send version until we hear
1983 if (hSocket != INVALID_SOCKET && !fInbound)
1986 GetNodeSignals().InitializeNode(GetId(), this);
1991 CloseSocket(hSocket);
1996 GetNodeSignals().FinalizeNode(GetId());
1999 void CNode::AskFor(const CInv& inv)
2001 if (mapAskFor.size() > MAPASKFOR_MAX_SZ)
2003 // We're using mapAskFor as a priority queue,
2004 // the key is the earliest time the request can be sent
2005 int64_t nRequestTime;
2006 limitedmap<CInv, int64_t>::const_iterator it = mapAlreadyAskedFor.find(inv);
2007 if (it != mapAlreadyAskedFor.end())
2008 nRequestTime = it->second;
2011 LogPrint("net", "askfor %s %d (%s) peer=%d\n", inv.ToString(), nRequestTime, DateTimeStrFormat("%H:%M:%S", nRequestTime/1000000), id);
2013 // Make sure not to reuse time indexes to keep things in the same order
2014 int64_t nNow = GetTimeMicros() - 1000000;
2015 static int64_t nLastTime;
2017 nNow = std::max(nNow, nLastTime);
2020 // Each retry is 2 minutes after the last
2021 nRequestTime = std::max(nRequestTime + 2 * 60 * 1000000, nNow);
2022 if (it != mapAlreadyAskedFor.end())
2023 mapAlreadyAskedFor.update(it, nRequestTime);
2025 mapAlreadyAskedFor.insert(std::make_pair(inv, nRequestTime));
2026 mapAskFor.insert(std::make_pair(nRequestTime, inv));
2029 void CNode::BeginMessage(const char* pszCommand) EXCLUSIVE_LOCK_FUNCTION(cs_vSend)
2031 ENTER_CRITICAL_SECTION(cs_vSend);
2032 assert(ssSend.size() == 0);
2033 ssSend << CMessageHeader(Params().MessageStart(), pszCommand, 0);
2034 LogPrint("net", "sending: %s ", SanitizeString(pszCommand));
2037 void CNode::AbortMessage() UNLOCK_FUNCTION(cs_vSend)
2041 LEAVE_CRITICAL_SECTION(cs_vSend);
2043 LogPrint("net", "(aborted)\n");
2046 void CNode::EndMessage() UNLOCK_FUNCTION(cs_vSend)
2048 // The -*messagestest options are intentionally not documented in the help message,
2049 // since they are only used during development to debug the networking code and are
2050 // not intended for end-users.
2051 if (mapArgs.count("-dropmessagestest") && GetRand(GetArg("-dropmessagestest", 2)) == 0)
2053 LogPrint("net", "dropmessages DROPPING SEND MESSAGE\n");
2057 if (mapArgs.count("-fuzzmessagestest"))
2058 Fuzz(GetArg("-fuzzmessagestest", 10));
2060 if (ssSend.size() == 0)
2062 LEAVE_CRITICAL_SECTION(cs_vSend);
2066 unsigned int nSize = ssSend.size() - CMessageHeader::HEADER_SIZE;
2067 WriteLE32((uint8_t*)&ssSend[CMessageHeader::MESSAGE_SIZE_OFFSET], nSize);
2070 uint256 hash = Hash(ssSend.begin() + CMessageHeader::HEADER_SIZE, ssSend.end());
2071 unsigned int nChecksum = 0;
2072 memcpy(&nChecksum, &hash, sizeof(nChecksum));
2073 assert(ssSend.size () >= CMessageHeader::CHECKSUM_OFFSET + sizeof(nChecksum));
2074 memcpy((char*)&ssSend[CMessageHeader::CHECKSUM_OFFSET], &nChecksum, sizeof(nChecksum));
2076 LogPrint("net", "(%d bytes) peer=%d\n", nSize, id);
2078 std::deque<CSerializeData>::iterator it = vSendMsg.insert(vSendMsg.end(), CSerializeData());
2079 ssSend.GetAndClear(*it);
2080 nSendSize += (*it).size();
2082 // If write queue empty, attempt "optimistic write"
2083 if (it == vSendMsg.begin())
2084 SocketSendData(this);
2086 LEAVE_CRITICAL_SECTION(cs_vSend);