69dc5b51a0
027de94Use network group instead of CNetAddr in final pass to select node to disconnect (Patrick Strateman)000c18aFix comment (Patrick Strateman)fed3094Acquire cs_vNodes before changing refrence counts (Patrick Strateman)69ee1aaCNodeRef copy constructor and assignment operator (Patrick Strateman)dc81dd0Return false early if vEvictionCandidates is empty (Patrick Strateman)17f3533Better support for nodes with non-standard nMaxConnections (Patrick Strateman)1317cd1RAII wrapper for CNode* (Patrick Strateman)df23937Add comments to AttemptToEvictConnection (Patrick Strateman)a8f6e45Remove redundant whiteconnections option (Patrick Strateman)b105ba3Prefer to disconnect peers in favor of whitelisted peers (Patrick Strateman)2c70153AttemptToEvictConnection (Patrick Strateman)4bac601Record nMinPingUsecTime (Patrick Strateman)ae037b7Refactor: Move failure conditions to the top of AcceptConnection (Patrick Strateman)1ef4817Refactor: Bail early in AcceptConnection (Patrick Strateman)541a1ddRefactor: AcceptConnection (Patrick Strateman)
2496 lines
75 KiB
C++
2496 lines
75 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2014 The Bitcoin Core developers
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// Distributed under the MIT 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 "clientversion.h"
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#include "crypto/common.h"
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#include "hash.h"
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#include "primitives/transaction.h"
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#include "scheduler.h"
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#include "ui_interface.h"
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#include "utilstrencodings.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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#include <boost/thread.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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// Fix for ancient MinGW versions, that don't have defined these in ws2tcpip.h.
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// Todo: Can be removed when our pull-tester is upgraded to a modern MinGW version.
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#ifdef WIN32
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#ifndef PROTECTION_LEVEL_UNRESTRICTED
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#define PROTECTION_LEVEL_UNRESTRICTED 10
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#endif
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#ifndef IPV6_PROTECTION_LEVEL
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#define IPV6_PROTECTION_LEVEL 23
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#endif
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#endif
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using namespace std;
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namespace {
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const int MAX_OUTBOUND_CONNECTIONS = 8;
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struct ListenSocket {
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SOCKET socket;
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bool whitelisted;
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ListenSocket(SOCKET socket, bool whitelisted) : socket(socket), whitelisted(whitelisted) {}
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};
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}
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//
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// Global state variables
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//
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bool fDiscover = true;
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bool fListen = true;
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uint64_t nLocalServices = NODE_NETWORK;
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CCriticalSection cs_mapLocalHost;
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map<CNetAddr, LocalServiceInfo> mapLocalHost;
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static bool vfReachable[NET_MAX] = {};
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static bool vfLimited[NET_MAX] = {};
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static CNode* pnodeLocalHost = NULL;
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uint64_t nLocalHostNonce = 0;
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static std::vector<ListenSocket> vhListenSocket;
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CAddrMan addrman;
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int nMaxConnections = DEFAULT_MAX_PEER_CONNECTIONS;
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bool fAddressesInitialized = false;
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std::string strSubVersion;
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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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boost::condition_variable messageHandlerCondition;
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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(const std::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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//! Convert the pnSeeds6 array into usable address objects.
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static std::vector<CAddress> convertSeed6(const std::vector<SeedSpec6> &vSeedsIn)
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{
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// It'll only connect to one or two seed nodes because once it connects,
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// it'll get a pile of addresses with newer timestamps.
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// Seed nodes are given a random 'last seen time' of between one and two
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// weeks ago.
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const int64_t nOneWeek = 7*24*60*60;
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std::vector<CAddress> vSeedsOut;
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vSeedsOut.reserve(vSeedsIn.size());
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for (std::vector<SeedSpec6>::const_iterator i(vSeedsIn.begin()); i != vSeedsIn.end(); ++i)
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{
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struct in6_addr ip;
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memcpy(&ip, i->addr, sizeof(ip));
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CAddress addr(CService(ip, i->port));
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addr.nTime = GetTime() - GetRand(nOneWeek) - nOneWeek;
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vSeedsOut.push_back(addr);
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}
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return vSeedsOut;
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}
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// get best local address for a particular peer as a CAddress
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// Otherwise, return the unroutable 0.0.0.0 but filled in with
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// the normal parameters, since the IP may be changed to a useful
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// one by discovery.
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CAddress GetLocalAddress(const CNetAddr *paddrPeer)
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{
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CAddress ret(CService("0.0.0.0",GetListenPort()),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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}
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ret.nServices = nLocalServices;
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ret.nTime = GetAdjustedTime();
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return ret;
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}
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int GetnScore(const CService& addr)
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{
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LOCK(cs_mapLocalHost);
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if (mapLocalHost.count(addr) == LOCAL_NONE)
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return 0;
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return mapLocalHost[addr].nScore;
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}
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// Is our peer's addrLocal potentially useful as an external IP source?
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bool IsPeerAddrLocalGood(CNode *pnode)
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{
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return fDiscover && pnode->addr.IsRoutable() && pnode->addrLocal.IsRoutable() &&
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!IsLimited(pnode->addrLocal.GetNetwork());
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}
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// pushes our own address to a peer
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void AdvertizeLocal(CNode *pnode)
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{
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if (fListen && pnode->fSuccessfullyConnected)
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{
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CAddress addrLocal = GetLocalAddress(&pnode->addr);
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// If discovery is enabled, sometimes give our peer the address it
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// tells us that it sees us as in case it has a better idea of our
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// address than we do.
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if (IsPeerAddrLocalGood(pnode) && (!addrLocal.IsRoutable() ||
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GetRand((GetnScore(addrLocal) > LOCAL_MANUAL) ? 8:2) == 0))
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{
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addrLocal.SetIP(pnode->addrLocal);
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}
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if (addrLocal.IsRoutable())
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{
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pnode->PushAddress(addrLocal);
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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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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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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 network is one we can probably connect to */
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bool IsReachable(enum Network net)
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{
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LOCK(cs_mapLocalHost);
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return vfReachable[net] && !vfLimited[net];
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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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enum Network net = addr.GetNetwork();
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return IsReachable(net);
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}
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void AddressCurrentlyConnected(const CService& addr)
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{
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addrman.Connected(addr);
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}
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uint64_t CNode::nTotalBytesRecv = 0;
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uint64_t CNode::nTotalBytesSent = 0;
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CCriticalSection CNode::cs_totalBytesRecv;
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CCriticalSection CNode::cs_totalBytesSent;
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CNode* FindNode(const CNetAddr& ip)
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{
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LOCK(cs_vNodes);
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BOOST_FOREACH(CNode* pnode, vNodes)
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if ((CNetAddr)pnode->addr == ip)
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return (pnode);
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return NULL;
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}
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CNode* FindNode(const CSubNet& subNet)
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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 (subNet.Match((CNetAddr)pnode->addr))
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return (pnode);
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return NULL;
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}
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CNode* FindNode(const std::string& addrName)
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{
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LOCK(cs_vNodes);
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BOOST_FOREACH(CNode* pnode, vNodes)
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if (pnode->addrName == addrName)
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return (pnode);
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return NULL;
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}
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CNode* FindNode(const CService& addr)
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{
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LOCK(cs_vNodes);
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BOOST_FOREACH(CNode* pnode, vNodes)
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if ((CService)pnode->addr == addr)
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return (pnode);
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return NULL;
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}
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CNode* ConnectNode(CAddress addrConnect, const char *pszDest)
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{
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if (pszDest == NULL) {
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if (IsLocal(addrConnect))
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return NULL;
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// Look for an existing connection
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CNode* pnode = FindNode((CService)addrConnect);
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if (pnode)
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{
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pnode->AddRef();
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return pnode;
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}
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}
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/// debug print
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LogPrint("net", "trying connection %s lastseen=%.1fhrs\n",
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pszDest ? pszDest : addrConnect.ToString(),
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pszDest ? 0.0 : (double)(GetAdjustedTime() - addrConnect.nTime)/3600.0);
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// Connect
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SOCKET hSocket;
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bool proxyConnectionFailed = false;
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if (pszDest ? ConnectSocketByName(addrConnect, hSocket, pszDest, Params().GetDefaultPort(), nConnectTimeout, &proxyConnectionFailed) :
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ConnectSocket(addrConnect, hSocket, nConnectTimeout, &proxyConnectionFailed))
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{
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if (!IsSelectableSocket(hSocket)) {
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LogPrintf("Cannot create connection: non-selectable socket created (fd >= FD_SETSIZE ?)\n");
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CloseSocket(hSocket);
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return NULL;
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}
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addrman.Attempt(addrConnect);
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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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} else if (!proxyConnectionFailed) {
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// If connecting to the node failed, and failure is not caused by a problem connecting to
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// the proxy, mark this as an attempt.
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addrman.Attempt(addrConnect);
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}
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return NULL;
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}
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void CNode::CloseSocketDisconnect()
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{
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fDisconnect = true;
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if (hSocket != INVALID_SOCKET)
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{
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LogPrint("net", "disconnecting peer=%d\n", id);
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CloseSocket(hSocket);
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}
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// in case this fails, we'll empty the recv buffer when the CNode is deleted
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TRY_LOCK(cs_vRecvMsg, lockRecv);
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if (lockRecv)
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vRecvMsg.clear();
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}
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void CNode::PushVersion()
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{
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int nBestHeight = g_signals.GetHeight().get_value_or(0);
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int64_t nTime = (fInbound ? GetAdjustedTime() : GetTime());
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CAddress addrYou = (addr.IsRoutable() && !IsProxy(addr) ? addr : CAddress(CService("0.0.0.0",0)));
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CAddress addrMe = GetLocalAddress(&addr);
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GetRandBytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
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if (fLogIPs)
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LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), addrYou.ToString(), id);
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else
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LogPrint("net", "send version message: version %d, blocks=%d, us=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), id);
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PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
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nLocalHostNonce, strSubVersion, nBestHeight, true);
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}
|
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|
|
|
|
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|
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banmap_t CNode::setBanned;
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CCriticalSection CNode::cs_setBanned;
|
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bool CNode::setBannedIsDirty;
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|
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void CNode::ClearBanned()
|
|
{
|
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LOCK(cs_setBanned);
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setBanned.clear();
|
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setBannedIsDirty = true;
|
|
}
|
|
|
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bool CNode::IsBanned(CNetAddr ip)
|
|
{
|
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bool fResult = false;
|
|
{
|
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LOCK(cs_setBanned);
|
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for (banmap_t::iterator it = setBanned.begin(); it != setBanned.end(); it++)
|
|
{
|
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CSubNet subNet = (*it).first;
|
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CBanEntry banEntry = (*it).second;
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|
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if(subNet.Match(ip) && GetTime() < banEntry.nBanUntil)
|
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fResult = true;
|
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}
|
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}
|
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return fResult;
|
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}
|
|
|
|
bool CNode::IsBanned(CSubNet subnet)
|
|
{
|
|
bool fResult = false;
|
|
{
|
|
LOCK(cs_setBanned);
|
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banmap_t::iterator i = setBanned.find(subnet);
|
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if (i != setBanned.end())
|
|
{
|
|
CBanEntry banEntry = (*i).second;
|
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if (GetTime() < banEntry.nBanUntil)
|
|
fResult = true;
|
|
}
|
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}
|
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return fResult;
|
|
}
|
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|
|
void CNode::Ban(const CNetAddr& addr, const BanReason &banReason, int64_t bantimeoffset, bool sinceUnixEpoch) {
|
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CSubNet subNet(addr);
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Ban(subNet, banReason, bantimeoffset, sinceUnixEpoch);
|
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}
|
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|
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void CNode::Ban(const CSubNet& subNet, const BanReason &banReason, int64_t bantimeoffset, bool sinceUnixEpoch) {
|
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CBanEntry banEntry(GetTime());
|
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banEntry.banReason = banReason;
|
|
if (bantimeoffset <= 0)
|
|
{
|
|
bantimeoffset = GetArg("-bantime", 60*60*24); // Default 24-hour ban
|
|
sinceUnixEpoch = false;
|
|
}
|
|
banEntry.nBanUntil = (sinceUnixEpoch ? 0 : GetTime() )+bantimeoffset;
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|
|
|
|
|
LOCK(cs_setBanned);
|
|
if (setBanned[subNet].nBanUntil < banEntry.nBanUntil)
|
|
setBanned[subNet] = banEntry;
|
|
|
|
setBannedIsDirty = true;
|
|
}
|
|
|
|
bool CNode::Unban(const CNetAddr &addr) {
|
|
CSubNet subNet(addr);
|
|
return Unban(subNet);
|
|
}
|
|
|
|
bool CNode::Unban(const CSubNet &subNet) {
|
|
LOCK(cs_setBanned);
|
|
if (setBanned.erase(subNet))
|
|
{
|
|
setBannedIsDirty = true;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void CNode::GetBanned(banmap_t &banMap)
|
|
{
|
|
LOCK(cs_setBanned);
|
|
banMap = setBanned; //create a thread safe copy
|
|
}
|
|
|
|
void CNode::SetBanned(const banmap_t &banMap)
|
|
{
|
|
LOCK(cs_setBanned);
|
|
setBanned = banMap;
|
|
setBannedIsDirty = true;
|
|
}
|
|
|
|
void CNode::SweepBanned()
|
|
{
|
|
int64_t now = GetTime();
|
|
|
|
LOCK(cs_setBanned);
|
|
banmap_t::iterator it = setBanned.begin();
|
|
while(it != setBanned.end())
|
|
{
|
|
CBanEntry banEntry = (*it).second;
|
|
if(now > banEntry.nBanUntil)
|
|
{
|
|
setBanned.erase(it++);
|
|
setBannedIsDirty = true;
|
|
}
|
|
else
|
|
++it;
|
|
}
|
|
}
|
|
|
|
bool CNode::BannedSetIsDirty()
|
|
{
|
|
LOCK(cs_setBanned);
|
|
return setBannedIsDirty;
|
|
}
|
|
|
|
void CNode::SetBannedSetDirty(bool dirty)
|
|
{
|
|
LOCK(cs_setBanned); //reuse setBanned lock for the isDirty flag
|
|
setBannedIsDirty = dirty;
|
|
}
|
|
|
|
|
|
std::vector<CSubNet> CNode::vWhitelistedRange;
|
|
CCriticalSection CNode::cs_vWhitelistedRange;
|
|
|
|
bool CNode::IsWhitelistedRange(const CNetAddr &addr) {
|
|
LOCK(cs_vWhitelistedRange);
|
|
BOOST_FOREACH(const CSubNet& subnet, vWhitelistedRange) {
|
|
if (subnet.Match(addr))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void CNode::AddWhitelistedRange(const CSubNet &subnet) {
|
|
LOCK(cs_vWhitelistedRange);
|
|
vWhitelistedRange.push_back(subnet);
|
|
}
|
|
|
|
#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(nTimeOffset);
|
|
X(addrName);
|
|
X(nVersion);
|
|
X(cleanSubVer);
|
|
X(fInbound);
|
|
X(nStartingHeight);
|
|
X(nSendBytes);
|
|
X(nRecvBytes);
|
|
X(fWhitelisted);
|
|
|
|
// 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(Params().MessageStart(), 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;
|
|
|
|
if (msg.in_data && msg.hdr.nMessageSize > MAX_PROTOCOL_MESSAGE_LENGTH) {
|
|
LogPrint("net", "Oversized message from peer=%i, disconnecting\n", GetId());
|
|
return false;
|
|
}
|
|
|
|
pch += handled;
|
|
nBytes -= handled;
|
|
|
|
if (msg.complete()) {
|
|
msg.nTime = GetTimeMicros();
|
|
messageHandlerCondition.notify_one();
|
|
}
|
|
}
|
|
|
|
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 (const std::exception&) {
|
|
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;
|
|
|
|
class CNodeRef {
|
|
public:
|
|
CNodeRef(CNode *pnode) : _pnode(pnode) {
|
|
LOCK(cs_vNodes);
|
|
_pnode->AddRef();
|
|
}
|
|
|
|
~CNodeRef() {
|
|
LOCK(cs_vNodes);
|
|
_pnode->Release();
|
|
}
|
|
|
|
CNode& operator *() const {return *_pnode;};
|
|
CNode* operator ->() const {return _pnode;};
|
|
|
|
CNodeRef& operator =(const CNodeRef& other)
|
|
{
|
|
if (this != &other) {
|
|
LOCK(cs_vNodes);
|
|
|
|
_pnode->Release();
|
|
_pnode = other._pnode;
|
|
_pnode->AddRef();
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
CNodeRef(const CNodeRef& other):
|
|
_pnode(other._pnode)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
_pnode->AddRef();
|
|
}
|
|
private:
|
|
CNode *_pnode;
|
|
};
|
|
|
|
static bool ReverseCompareNodeMinPingTime(const CNodeRef &a, const CNodeRef &b)
|
|
{
|
|
return a->nMinPingUsecTime > b->nMinPingUsecTime;
|
|
}
|
|
|
|
static bool ReverseCompareNodeTimeConnected(const CNodeRef &a, const CNodeRef &b)
|
|
{
|
|
return a->nTimeConnected > b->nTimeConnected;
|
|
}
|
|
|
|
class CompareNetGroupKeyed
|
|
{
|
|
std::vector<unsigned char> vchSecretKey;
|
|
public:
|
|
CompareNetGroupKeyed()
|
|
{
|
|
vchSecretKey.resize(32, 0);
|
|
GetRandBytes(vchSecretKey.data(), vchSecretKey.size());
|
|
}
|
|
|
|
bool operator()(const CNodeRef &a, const CNodeRef &b)
|
|
{
|
|
std::vector<unsigned char> vchGroupA, vchGroupB;
|
|
CSHA256 hashA, hashB;
|
|
std::vector<unsigned char> vchA(32), vchB(32);
|
|
|
|
vchGroupA = a->addr.GetGroup();
|
|
vchGroupB = b->addr.GetGroup();
|
|
|
|
hashA.Write(begin_ptr(vchGroupA), vchGroupA.size());
|
|
hashB.Write(begin_ptr(vchGroupB), vchGroupB.size());
|
|
|
|
hashA.Write(begin_ptr(vchSecretKey), vchSecretKey.size());
|
|
hashB.Write(begin_ptr(vchSecretKey), vchSecretKey.size());
|
|
|
|
hashA.Finalize(begin_ptr(vchA));
|
|
hashB.Finalize(begin_ptr(vchB));
|
|
|
|
return vchA < vchB;
|
|
}
|
|
};
|
|
|
|
static bool AttemptToEvictConnection(bool fPreferNewConnection) {
|
|
std::vector<CNodeRef> vEvictionCandidates;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
|
|
BOOST_FOREACH(CNode *node, vNodes) {
|
|
if (node->fWhitelisted)
|
|
continue;
|
|
if (!node->fInbound)
|
|
continue;
|
|
if (node->fDisconnect)
|
|
continue;
|
|
if (node->addr.IsLocal())
|
|
continue;
|
|
vEvictionCandidates.push_back(CNodeRef(node));
|
|
}
|
|
}
|
|
|
|
if (vEvictionCandidates.empty()) return false;
|
|
|
|
// Protect connections with certain characteristics
|
|
|
|
// Deterministically select 4 peers to protect by netgroup.
|
|
// An attacker cannot predict which netgroups will be protected.
|
|
static CompareNetGroupKeyed comparerNetGroupKeyed;
|
|
std::sort(vEvictionCandidates.begin(), vEvictionCandidates.end(), comparerNetGroupKeyed);
|
|
vEvictionCandidates.erase(vEvictionCandidates.end() - std::min(4, static_cast<int>(vEvictionCandidates.size())), vEvictionCandidates.end());
|
|
|
|
if (vEvictionCandidates.empty()) return false;
|
|
|
|
// Protect the 8 nodes with the best ping times.
|
|
// An attacker cannot manipulate this metric without physically moving nodes closer to the target.
|
|
std::sort(vEvictionCandidates.begin(), vEvictionCandidates.end(), ReverseCompareNodeMinPingTime);
|
|
vEvictionCandidates.erase(vEvictionCandidates.end() - std::min(8, static_cast<int>(vEvictionCandidates.size())), vEvictionCandidates.end());
|
|
|
|
if (vEvictionCandidates.empty()) return false;
|
|
|
|
// Protect the half of the remaining nodes which have been connected the longest.
|
|
// This replicates the existing implicit behavior.
|
|
std::sort(vEvictionCandidates.begin(), vEvictionCandidates.end(), ReverseCompareNodeTimeConnected);
|
|
vEvictionCandidates.erase(vEvictionCandidates.end() - static_cast<int>(vEvictionCandidates.size() / 2), vEvictionCandidates.end());
|
|
|
|
if (vEvictionCandidates.empty()) return false;
|
|
|
|
// Identify the network group with the most connections
|
|
std::vector<unsigned char> naMostConnections;
|
|
unsigned int nMostConnections = 0;
|
|
std::map<std::vector<unsigned char>, std::vector<CNodeRef> > mapAddrCounts;
|
|
BOOST_FOREACH(const CNodeRef &node, vEvictionCandidates) {
|
|
mapAddrCounts[node->addr.GetGroup()].push_back(node);
|
|
|
|
if (mapAddrCounts[node->addr.GetGroup()].size() > nMostConnections) {
|
|
nMostConnections = mapAddrCounts[node->addr.GetGroup()].size();
|
|
naMostConnections = node->addr.GetGroup();
|
|
}
|
|
}
|
|
|
|
// Reduce to the network group with the most connections
|
|
vEvictionCandidates = mapAddrCounts[naMostConnections];
|
|
|
|
// Do not disconnect peers if there is only 1 connection from their network group
|
|
if (vEvictionCandidates.size() <= 1)
|
|
// unless we prefer the new connection (for whitelisted peers)
|
|
if (!fPreferNewConnection)
|
|
return false;
|
|
|
|
// Disconnect the most recent connection from the network group with the most connections
|
|
std::sort(vEvictionCandidates.begin(), vEvictionCandidates.end(), ReverseCompareNodeTimeConnected);
|
|
vEvictionCandidates[0]->fDisconnect = true;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void AcceptConnection(const ListenSocket& hListenSocket) {
|
|
struct sockaddr_storage sockaddr;
|
|
socklen_t len = sizeof(sockaddr);
|
|
SOCKET hSocket = accept(hListenSocket.socket, (struct sockaddr*)&sockaddr, &len);
|
|
CAddress addr;
|
|
int nInbound = 0;
|
|
int nMaxInbound = nMaxConnections - MAX_OUTBOUND_CONNECTIONS;
|
|
|
|
if (hSocket != INVALID_SOCKET)
|
|
if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr))
|
|
LogPrintf("Warning: Unknown socket family\n");
|
|
|
|
bool whitelisted = hListenSocket.whitelisted || CNode::IsWhitelistedRange(addr);
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
if (pnode->fInbound)
|
|
nInbound++;
|
|
}
|
|
|
|
if (hSocket == INVALID_SOCKET)
|
|
{
|
|
int nErr = WSAGetLastError();
|
|
if (nErr != WSAEWOULDBLOCK)
|
|
LogPrintf("socket error accept failed: %s\n", NetworkErrorString(nErr));
|
|
return;
|
|
}
|
|
|
|
if (!IsSelectableSocket(hSocket))
|
|
{
|
|
LogPrintf("connection from %s dropped: non-selectable socket\n", addr.ToString());
|
|
CloseSocket(hSocket);
|
|
return;
|
|
}
|
|
|
|
if (CNode::IsBanned(addr) && !whitelisted)
|
|
{
|
|
LogPrintf("connection from %s dropped (banned)\n", addr.ToString());
|
|
CloseSocket(hSocket);
|
|
return;
|
|
}
|
|
|
|
if (nInbound >= nMaxInbound)
|
|
{
|
|
if (!AttemptToEvictConnection(whitelisted)) {
|
|
// No connection to evict, disconnect the new connection
|
|
LogPrint("net", "failed to find an eviction candidate - connection dropped (full)\n");
|
|
CloseSocket(hSocket);
|
|
return;
|
|
}
|
|
}
|
|
|
|
CNode* pnode = new CNode(hSocket, addr, "", true);
|
|
pnode->AddRef();
|
|
pnode->fWhitelisted = whitelisted;
|
|
|
|
LogPrint("net", "connection from %s accepted\n", addr.ToString());
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodes.push_back(pnode);
|
|
}
|
|
}
|
|
|
|
void ThreadSocketHandler()
|
|
{
|
|
unsigned int nPrevNodeCount = 0;
|
|
while (true)
|
|
{
|
|
//
|
|
// Disconnect nodes
|
|
//
|
|
{
|
|
LOCK(cs_vNodes);
|
|
// Disconnect unused nodes
|
|
vector<CNode*> vNodesCopy = vNodes;
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
{
|
|
if (pnode->fDisconnect ||
|
|
(pnode->GetRefCount() <= 0 && pnode->vRecvMsg.empty() && pnode->nSendSize == 0 && pnode->ssSend.empty()))
|
|
{
|
|
// remove from vNodes
|
|
vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
|
|
|
|
// release outbound grant (if any)
|
|
pnode->grantOutbound.Release();
|
|
|
|
// close socket and cleanup
|
|
pnode->CloseSocketDisconnect();
|
|
|
|
// hold in disconnected pool until all refs are released
|
|
if (pnode->fNetworkNode || pnode->fInbound)
|
|
pnode->Release();
|
|
vNodesDisconnected.push_back(pnode);
|
|
}
|
|
}
|
|
}
|
|
{
|
|
// Delete disconnected nodes
|
|
list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
|
|
BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy)
|
|
{
|
|
// wait until threads are done using it
|
|
if (pnode->GetRefCount() <= 0)
|
|
{
|
|
bool fDelete = false;
|
|
{
|
|
TRY_LOCK(pnode->cs_vSend, lockSend);
|
|
if (lockSend)
|
|
{
|
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
|
|
if (lockRecv)
|
|
{
|
|
TRY_LOCK(pnode->cs_inventory, lockInv);
|
|
if (lockInv)
|
|
fDelete = true;
|
|
}
|
|
}
|
|
}
|
|
if (fDelete)
|
|
{
|
|
vNodesDisconnected.remove(pnode);
|
|
delete pnode;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if(vNodes.size() != nPrevNodeCount) {
|
|
nPrevNodeCount = vNodes.size();
|
|
uiInterface.NotifyNumConnectionsChanged(nPrevNodeCount);
|
|
}
|
|
|
|
//
|
|
// Find which sockets have data to receive
|
|
//
|
|
struct timeval timeout;
|
|
timeout.tv_sec = 0;
|
|
timeout.tv_usec = 50000; // frequency to poll pnode->vSend
|
|
|
|
fd_set fdsetRecv;
|
|
fd_set fdsetSend;
|
|
fd_set fdsetError;
|
|
FD_ZERO(&fdsetRecv);
|
|
FD_ZERO(&fdsetSend);
|
|
FD_ZERO(&fdsetError);
|
|
SOCKET hSocketMax = 0;
|
|
bool have_fds = false;
|
|
|
|
BOOST_FOREACH(const ListenSocket& hListenSocket, vhListenSocket) {
|
|
FD_SET(hListenSocket.socket, &fdsetRecv);
|
|
hSocketMax = max(hSocketMax, hListenSocket.socket);
|
|
have_fds = true;
|
|
}
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
{
|
|
if (pnode->hSocket == INVALID_SOCKET)
|
|
continue;
|
|
FD_SET(pnode->hSocket, &fdsetError);
|
|
hSocketMax = max(hSocketMax, pnode->hSocket);
|
|
have_fds = true;
|
|
|
|
// Implement the following logic:
|
|
// * If there is data to send, select() for sending data. As this only
|
|
// happens when optimistic write failed, we choose to first drain the
|
|
// write buffer in this case before receiving more. This avoids
|
|
// needlessly queueing received data, if the remote peer is not themselves
|
|
// receiving data. This means properly utilizing TCP flow control signalling.
|
|
// * Otherwise, if there is no (complete) message in the receive buffer,
|
|
// or there is space left in the buffer, select() for receiving data.
|
|
// * (if neither of the above applies, there is certainly one message
|
|
// in the receiver buffer ready to be processed).
|
|
// Together, that means that at least one of the following is always possible,
|
|
// so we don't deadlock:
|
|
// * We send some data.
|
|
// * We wait for data to be received (and disconnect after timeout).
|
|
// * We process a message in the buffer (message handler thread).
|
|
{
|
|
TRY_LOCK(pnode->cs_vSend, lockSend);
|
|
if (lockSend && !pnode->vSendMsg.empty()) {
|
|
FD_SET(pnode->hSocket, &fdsetSend);
|
|
continue;
|
|
}
|
|
}
|
|
{
|
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
|
|
if (lockRecv && (
|
|
pnode->vRecvMsg.empty() || !pnode->vRecvMsg.front().complete() ||
|
|
pnode->GetTotalRecvSize() <= ReceiveFloodSize()))
|
|
FD_SET(pnode->hSocket, &fdsetRecv);
|
|
}
|
|
}
|
|
}
|
|
|
|
int nSelect = select(have_fds ? hSocketMax + 1 : 0,
|
|
&fdsetRecv, &fdsetSend, &fdsetError, &timeout);
|
|
boost::this_thread::interruption_point();
|
|
|
|
if (nSelect == SOCKET_ERROR)
|
|
{
|
|
if (have_fds)
|
|
{
|
|
int nErr = WSAGetLastError();
|
|
LogPrintf("socket select error %s\n", NetworkErrorString(nErr));
|
|
for (unsigned int i = 0; i <= hSocketMax; i++)
|
|
FD_SET(i, &fdsetRecv);
|
|
}
|
|
FD_ZERO(&fdsetSend);
|
|
FD_ZERO(&fdsetError);
|
|
MilliSleep(timeout.tv_usec/1000);
|
|
}
|
|
|
|
//
|
|
// Accept new connections
|
|
//
|
|
BOOST_FOREACH(const ListenSocket& hListenSocket, vhListenSocket)
|
|
{
|
|
if (hListenSocket.socket != INVALID_SOCKET && FD_ISSET(hListenSocket.socket, &fdsetRecv))
|
|
{
|
|
AcceptConnection(hListenSocket);
|
|
}
|
|
}
|
|
|
|
//
|
|
// Service each socket
|
|
//
|
|
vector<CNode*> vNodesCopy;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodesCopy = vNodes;
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
pnode->AddRef();
|
|
}
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
{
|
|
boost::this_thread::interruption_point();
|
|
|
|
//
|
|
// Receive
|
|
//
|
|
if (pnode->hSocket == INVALID_SOCKET)
|
|
continue;
|
|
if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
|
|
{
|
|
TRY_LOCK(pnode->cs_vRecvMsg, lockRecv);
|
|
if (lockRecv)
|
|
{
|
|
{
|
|
// typical socket buffer is 8K-64K
|
|
char pchBuf[0x10000];
|
|
int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
|
|
if (nBytes > 0)
|
|
{
|
|
if (!pnode->ReceiveMsgBytes(pchBuf, nBytes))
|
|
pnode->CloseSocketDisconnect();
|
|
pnode->nLastRecv = GetTime();
|
|
pnode->nRecvBytes += nBytes;
|
|
pnode->RecordBytesRecv(nBytes);
|
|
}
|
|
else if (nBytes == 0)
|
|
{
|
|
// socket closed gracefully
|
|
if (!pnode->fDisconnect)
|
|
LogPrint("net", "socket closed\n");
|
|
pnode->CloseSocketDisconnect();
|
|
}
|
|
else if (nBytes < 0)
|
|
{
|
|
// error
|
|
int nErr = WSAGetLastError();
|
|
if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
|
|
{
|
|
if (!pnode->fDisconnect)
|
|
LogPrintf("socket recv error %s\n", NetworkErrorString(nErr));
|
|
pnode->CloseSocketDisconnect();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Send
|
|
//
|
|
if (pnode->hSocket == INVALID_SOCKET)
|
|
continue;
|
|
if (FD_ISSET(pnode->hSocket, &fdsetSend))
|
|
{
|
|
TRY_LOCK(pnode->cs_vSend, lockSend);
|
|
if (lockSend)
|
|
SocketSendData(pnode);
|
|
}
|
|
|
|
//
|
|
// Inactivity checking
|
|
//
|
|
int64_t nTime = GetTime();
|
|
if (nTime - pnode->nTimeConnected > 60)
|
|
{
|
|
if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
|
|
{
|
|
LogPrint("net", "socket no message in first 60 seconds, %d %d from %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0, pnode->id);
|
|
pnode->fDisconnect = true;
|
|
}
|
|
else if (nTime - pnode->nLastSend > TIMEOUT_INTERVAL)
|
|
{
|
|
LogPrintf("socket sending timeout: %is\n", nTime - pnode->nLastSend);
|
|
pnode->fDisconnect = true;
|
|
}
|
|
else if (nTime - pnode->nLastRecv > (pnode->nVersion > BIP0031_VERSION ? TIMEOUT_INTERVAL : 90*60))
|
|
{
|
|
LogPrintf("socket receive timeout: %is\n", nTime - pnode->nLastRecv);
|
|
pnode->fDisconnect = true;
|
|
}
|
|
else if (pnode->nPingNonceSent && pnode->nPingUsecStart + TIMEOUT_INTERVAL * 1000000 < GetTimeMicros())
|
|
{
|
|
LogPrintf("ping timeout: %fs\n", 0.000001 * (GetTimeMicros() - pnode->nPingUsecStart));
|
|
pnode->fDisconnect = true;
|
|
}
|
|
}
|
|
}
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
pnode->Release();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#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);
|
|
#elif MINIUPNPC_API_VERSION < 14
|
|
/* miniupnpc 1.6 */
|
|
int error = 0;
|
|
devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0, 0, &error);
|
|
#else
|
|
/* miniupnpc 1.9.20150730 */
|
|
int error = 0;
|
|
devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0, 0, 2, &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 (const 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()
|
|
{
|
|
// goal: only query DNS seeds if address need is acute
|
|
if ((addrman.size() > 0) &&
|
|
(!GetBoolArg("-forcednsseed", false))) {
|
|
MilliSleep(11 * 1000);
|
|
|
|
LOCK(cs_vNodes);
|
|
if (vNodes.size() >= 2) {
|
|
LogPrintf("P2P peers available. Skipped DNS seeding.\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
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(const 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 DumpData()
|
|
{
|
|
DumpAddresses();
|
|
|
|
if (CNode::BannedSetIsDirty())
|
|
{
|
|
DumpBanlist();
|
|
CNode::SetBannedSetDirty(false);
|
|
}
|
|
}
|
|
|
|
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(const std::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(convertSeed6(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)
|
|
{
|
|
CAddrInfo addr = addrman.Select();
|
|
|
|
// 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(const std::string& strAddNode, vAddedNodes)
|
|
lAddresses.push_back(strAddNode);
|
|
}
|
|
BOOST_FOREACH(const std::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(const std::string& strAddNode, vAddedNodes)
|
|
lAddresses.push_back(strAddNode);
|
|
}
|
|
|
|
list<vector<CService> > lservAddressesToAdd(0);
|
|
BOOST_FOREACH(const std::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(const 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(const CService& addrNode, *(it))
|
|
if (pnode->addr == addrNode)
|
|
{
|
|
it = lservAddressesToAdd.erase(it);
|
|
it--;
|
|
break;
|
|
}
|
|
}
|
|
BOOST_FOREACH(vector<CService>& vserv, lservAddressesToAdd)
|
|
{
|
|
CSemaphoreGrant grant(*semOutbound);
|
|
OpenNetworkConnection(CAddress(vserv[i % vserv.size()]), &grant);
|
|
MilliSleep(500);
|
|
}
|
|
MilliSleep(120000); // Retry every 2 minutes
|
|
}
|
|
}
|
|
|
|
// if successful, this moves the passed grant to the constructed node
|
|
bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOutbound, const char *pszDest, bool fOneShot)
|
|
{
|
|
//
|
|
// Initiate outbound network connection
|
|
//
|
|
boost::this_thread::interruption_point();
|
|
if (!pszDest) {
|
|
if (IsLocal(addrConnect) ||
|
|
FindNode((CNetAddr)addrConnect) || CNode::IsBanned(addrConnect) ||
|
|
FindNode(addrConnect.ToStringIPPort()))
|
|
return false;
|
|
} else if (FindNode(std::string(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;
|
|
}
|
|
|
|
|
|
void ThreadMessageHandler()
|
|
{
|
|
boost::mutex condition_mutex;
|
|
boost::unique_lock<boost::mutex> lock(condition_mutex);
|
|
|
|
SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
|
|
while (true)
|
|
{
|
|
vector<CNode*> vNodesCopy;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodesCopy = vNodes;
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy) {
|
|
pnode->AddRef();
|
|
}
|
|
}
|
|
|
|
// Poll the connected nodes for messages
|
|
CNode* pnodeTrickle = NULL;
|
|
if (!vNodesCopy.empty())
|
|
pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
|
|
|
|
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 || pnode->fWhitelisted);
|
|
}
|
|
boost::this_thread::interruption_point();
|
|
}
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodesCopy)
|
|
pnode->Release();
|
|
}
|
|
|
|
if (fSleep)
|
|
messageHandlerCondition.timed_wait(lock, boost::posix_time::microsec_clock::universal_time() + boost::posix_time::milliseconds(100));
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
bool BindListenPort(const CService &addrBind, string& strError, bool fWhitelisted)
|
|
{
|
|
strError = "";
|
|
int nOne = 1;
|
|
|
|
// Create socket for listening for incoming connections
|
|
struct sockaddr_storage sockaddr;
|
|
socklen_t len = sizeof(sockaddr);
|
|
if (!addrBind.GetSockAddr((struct sockaddr*)&sockaddr, &len))
|
|
{
|
|
strError = strprintf("Error: Bind address family for %s not supported", addrBind.ToString());
|
|
LogPrintf("%s\n", strError);
|
|
return false;
|
|
}
|
|
|
|
SOCKET hListenSocket = socket(((struct sockaddr*)&sockaddr)->sa_family, SOCK_STREAM, IPPROTO_TCP);
|
|
if (hListenSocket == INVALID_SOCKET)
|
|
{
|
|
strError = strprintf("Error: Couldn't open socket for incoming connections (socket returned error %s)", NetworkErrorString(WSAGetLastError()));
|
|
LogPrintf("%s\n", strError);
|
|
return false;
|
|
}
|
|
if (!IsSelectableSocket(hListenSocket))
|
|
{
|
|
strError = "Error: Couldn't create a listenable socket for incoming connections";
|
|
LogPrintf("%s\n", strError);
|
|
return false;
|
|
}
|
|
|
|
|
|
#ifndef WIN32
|
|
#ifdef SO_NOSIGPIPE
|
|
// Different way of disabling SIGPIPE on BSD
|
|
setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
|
|
#endif
|
|
// Allow binding if the port is still in TIME_WAIT state after
|
|
// the program was closed and restarted.
|
|
setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int));
|
|
#else
|
|
setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (const char*)&nOne, sizeof(int));
|
|
#endif
|
|
|
|
// Set to non-blocking, incoming connections will also inherit this
|
|
if (!SetSocketNonBlocking(hListenSocket, true)) {
|
|
strError = strprintf("BindListenPort: Setting listening socket to non-blocking failed, error %s\n", NetworkErrorString(WSAGetLastError()));
|
|
LogPrintf("%s\n", strError);
|
|
return false;
|
|
}
|
|
|
|
// some systems don't have IPV6_V6ONLY but are always v6only; others do have the option
|
|
// and enable it by default or not. Try to enable it, if possible.
|
|
if (addrBind.IsIPv6()) {
|
|
#ifdef IPV6_V6ONLY
|
|
#ifdef WIN32
|
|
setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&nOne, sizeof(int));
|
|
#else
|
|
setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&nOne, sizeof(int));
|
|
#endif
|
|
#endif
|
|
#ifdef WIN32
|
|
int nProtLevel = PROTECTION_LEVEL_UNRESTRICTED;
|
|
setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL, (const char*)&nProtLevel, sizeof(int));
|
|
#endif
|
|
}
|
|
|
|
if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
|
|
{
|
|
int nErr = WSAGetLastError();
|
|
if (nErr == WSAEADDRINUSE)
|
|
strError = strprintf(_("Unable to bind to %s on this computer. Bitcoin Core is probably already running."), addrBind.ToString());
|
|
else
|
|
strError = strprintf(_("Unable to bind to %s on this computer (bind returned error %s)"), addrBind.ToString(), NetworkErrorString(nErr));
|
|
LogPrintf("%s\n", strError);
|
|
CloseSocket(hListenSocket);
|
|
return false;
|
|
}
|
|
LogPrintf("Bound to %s\n", addrBind.ToString());
|
|
|
|
// Listen for incoming connections
|
|
if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR)
|
|
{
|
|
strError = strprintf(_("Error: Listening for incoming connections failed (listen returned error %s)"), NetworkErrorString(WSAGetLastError()));
|
|
LogPrintf("%s\n", strError);
|
|
CloseSocket(hListenSocket);
|
|
return false;
|
|
}
|
|
|
|
vhListenSocket.push_back(ListenSocket(hListenSocket, fWhitelisted));
|
|
|
|
if (addrBind.IsRoutable() && fDiscover && !fWhitelisted)
|
|
AddLocal(addrBind, LOCAL_BIND);
|
|
|
|
return true;
|
|
}
|
|
|
|
void static Discover(boost::thread_group& threadGroup)
|
|
{
|
|
if (!fDiscover)
|
|
return;
|
|
|
|
#ifdef WIN32
|
|
// Get local host IP
|
|
char pszHostName[256] = "";
|
|
if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR)
|
|
{
|
|
vector<CNetAddr> vaddr;
|
|
if (LookupHost(pszHostName, vaddr))
|
|
{
|
|
BOOST_FOREACH (const CNetAddr &addr, vaddr)
|
|
{
|
|
if (AddLocal(addr, LOCAL_IF))
|
|
LogPrintf("%s: %s - %s\n", __func__, pszHostName, addr.ToString());
|
|
}
|
|
}
|
|
}
|
|
#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("%s: IPv4 %s: %s\n", __func__, 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("%s: IPv6 %s: %s\n", __func__, ifa->ifa_name, addr.ToString());
|
|
}
|
|
}
|
|
freeifaddrs(myaddrs);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void StartNode(boost::thread_group& threadGroup, CScheduler& scheduler)
|
|
{
|
|
uiInterface.InitMessage(_("Loading addresses..."));
|
|
// Load addresses for peers.dat
|
|
int64_t nStart = GetTimeMillis();
|
|
{
|
|
CAddrDB adb;
|
|
if (!adb.Read(addrman))
|
|
LogPrintf("Invalid or missing peers.dat; recreating\n");
|
|
}
|
|
|
|
//try to read stored banlist
|
|
CBanDB bandb;
|
|
banmap_t banmap;
|
|
if (!bandb.Read(banmap))
|
|
LogPrintf("Invalid or missing banlist.dat; recreating\n");
|
|
|
|
CNode::SetBanned(banmap); //thread save setter
|
|
CNode::SetBannedSetDirty(false); //no need to write down just read or nonexistent data
|
|
CNode::SweepBanned(); //sweap out unused entries
|
|
|
|
LogPrintf("Loaded %i addresses from peers.dat %dms\n",
|
|
addrman.size(), GetTimeMillis() - nStart);
|
|
fAddressesInitialized = true;
|
|
|
|
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
|
|
scheduler.scheduleEvery(&DumpData, DUMP_ADDRESSES_INTERVAL);
|
|
}
|
|
|
|
bool StopNode()
|
|
{
|
|
LogPrintf("StopNode()\n");
|
|
MapPort(false);
|
|
if (semOutbound)
|
|
for (int i=0; i<MAX_OUTBOUND_CONNECTIONS; i++)
|
|
semOutbound->post();
|
|
|
|
if (fAddressesInitialized)
|
|
{
|
|
DumpData();
|
|
fAddressesInitialized = false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
class CNetCleanup
|
|
{
|
|
public:
|
|
CNetCleanup() {}
|
|
|
|
~CNetCleanup()
|
|
{
|
|
// Close sockets
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
if (pnode->hSocket != INVALID_SOCKET)
|
|
CloseSocket(pnode->hSocket);
|
|
BOOST_FOREACH(ListenSocket& hListenSocket, vhListenSocket)
|
|
if (hListenSocket.socket != INVALID_SOCKET)
|
|
if (!CloseSocket(hListenSocket.socket))
|
|
LogPrintf("CloseSocket(hListenSocket) failed with error %s\n", NetworkErrorString(WSAGetLastError()));
|
|
|
|
// clean up some globals (to help leak detection)
|
|
BOOST_FOREACH(CNode *pnode, vNodes)
|
|
delete pnode;
|
|
BOOST_FOREACH(CNode *pnode, vNodesDisconnected)
|
|
delete pnode;
|
|
vNodes.clear();
|
|
vNodesDisconnected.clear();
|
|
vhListenSocket.clear();
|
|
delete semOutbound;
|
|
semOutbound = NULL;
|
|
delete pnodeLocalHost;
|
|
pnodeLocalHost = NULL;
|
|
|
|
#ifdef WIN32
|
|
// Shutdown Windows Sockets
|
|
WSACleanup();
|
|
#endif
|
|
}
|
|
}
|
|
instance_of_cnetcleanup;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void RelayTransaction(const CTransaction& tx)
|
|
{
|
|
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
|
|
ss.reserve(10000);
|
|
ss << tx;
|
|
RelayTransaction(tx, ss);
|
|
}
|
|
|
|
void RelayTransaction(const CTransaction& tx, const CDataStream& ss)
|
|
{
|
|
CInv inv(MSG_TX, tx.GetHash());
|
|
{
|
|
LOCK(cs_mapRelay);
|
|
// Expire old relay messages
|
|
while (!vRelayExpiration.empty() && vRelayExpiration.front().first < GetTime())
|
|
{
|
|
mapRelay.erase(vRelayExpiration.front().second);
|
|
vRelayExpiration.pop_front();
|
|
}
|
|
|
|
// Save original serialized message so newer versions are preserved
|
|
mapRelay.insert(std::make_pair(inv, ss));
|
|
vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, inv));
|
|
}
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
{
|
|
if(!pnode->fRelayTxes)
|
|
continue;
|
|
LOCK(pnode->cs_filter);
|
|
if (pnode->pfilter)
|
|
{
|
|
if (pnode->pfilter->IsRelevantAndUpdate(tx))
|
|
pnode->PushInventory(inv);
|
|
} else
|
|
pnode->PushInventory(inv);
|
|
}
|
|
}
|
|
|
|
void CNode::RecordBytesRecv(uint64_t bytes)
|
|
{
|
|
LOCK(cs_totalBytesRecv);
|
|
nTotalBytesRecv += bytes;
|
|
}
|
|
|
|
void CNode::RecordBytesSent(uint64_t bytes)
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
nTotalBytesSent += bytes;
|
|
}
|
|
|
|
uint64_t CNode::GetTotalBytesRecv()
|
|
{
|
|
LOCK(cs_totalBytesRecv);
|
|
return nTotalBytesRecv;
|
|
}
|
|
|
|
uint64_t CNode::GetTotalBytesSent()
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
return nTotalBytesSent;
|
|
}
|
|
|
|
void CNode::Fuzz(int nChance)
|
|
{
|
|
if (!fSuccessfullyConnected) return; // Don't fuzz initial handshake
|
|
if (GetRand(nChance) != 0) return; // Fuzz 1 of every nChance messages
|
|
|
|
switch (GetRand(3))
|
|
{
|
|
case 0:
|
|
// xor a random byte with a random value:
|
|
if (!ssSend.empty()) {
|
|
CDataStream::size_type pos = GetRand(ssSend.size());
|
|
ssSend[pos] ^= (unsigned char)(GetRand(256));
|
|
}
|
|
break;
|
|
case 1:
|
|
// delete a random byte:
|
|
if (!ssSend.empty()) {
|
|
CDataStream::size_type pos = GetRand(ssSend.size());
|
|
ssSend.erase(ssSend.begin()+pos);
|
|
}
|
|
break;
|
|
case 2:
|
|
// insert a random byte at a random position
|
|
{
|
|
CDataStream::size_type pos = GetRand(ssSend.size());
|
|
char ch = (char)GetRand(256);
|
|
ssSend.insert(ssSend.begin()+pos, ch);
|
|
}
|
|
break;
|
|
}
|
|
// Chance of more than one change half the time:
|
|
// (more changes exponentially less likely):
|
|
Fuzz(2);
|
|
}
|
|
|
|
//
|
|
// CAddrDB
|
|
//
|
|
|
|
CAddrDB::CAddrDB()
|
|
{
|
|
pathAddr = GetDataDir() / "peers.dat";
|
|
}
|
|
|
|
bool CAddrDB::Write(const CAddrMan& addr)
|
|
{
|
|
// Generate random temporary filename
|
|
unsigned short randv = 0;
|
|
GetRandBytes((unsigned char*)&randv, sizeof(randv));
|
|
std::string tmpfn = strprintf("peers.dat.%04x", randv);
|
|
|
|
// serialize addresses, checksum data up to that point, then append csum
|
|
CDataStream ssPeers(SER_DISK, CLIENT_VERSION);
|
|
ssPeers << FLATDATA(Params().MessageStart());
|
|
ssPeers << addr;
|
|
uint256 hash = Hash(ssPeers.begin(), ssPeers.end());
|
|
ssPeers << hash;
|
|
|
|
// open temp output file, and associate with CAutoFile
|
|
boost::filesystem::path pathTmp = GetDataDir() / tmpfn;
|
|
FILE *file = fopen(pathTmp.string().c_str(), "wb");
|
|
CAutoFile fileout(file, SER_DISK, CLIENT_VERSION);
|
|
if (fileout.IsNull())
|
|
return error("%s: Failed to open file %s", __func__, pathTmp.string());
|
|
|
|
// Write and commit header, data
|
|
try {
|
|
fileout << ssPeers;
|
|
}
|
|
catch (const std::exception& e) {
|
|
return error("%s: Serialize or I/O error - %s", __func__, e.what());
|
|
}
|
|
FileCommit(fileout.Get());
|
|
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(file, SER_DISK, CLIENT_VERSION);
|
|
if (filein.IsNull())
|
|
return error("%s: Failed to open file %s", __func__, pathAddr.string());
|
|
|
|
// use file size to size memory buffer
|
|
uint64_t fileSize = boost::filesystem::file_size(pathAddr);
|
|
uint64_t dataSize = 0;
|
|
// Don't try to resize to a negative number if file is small
|
|
if (fileSize >= sizeof(uint256))
|
|
dataSize = fileSize - sizeof(uint256);
|
|
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 (const 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 (const std::exception& e) {
|
|
return error("%s: Deserialize or I/O error - %s", __func__, e.what());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
unsigned int ReceiveFloodSize() { return 1000*GetArg("-maxreceivebuffer", 5*1000); }
|
|
unsigned int SendBufferSize() { return 1000*GetArg("-maxsendbuffer", 1*1000); }
|
|
|
|
CNode::CNode(SOCKET hSocketIn, const CAddress& addrIn, const std::string& addrNameIn, bool fInboundIn) :
|
|
ssSend(SER_NETWORK, INIT_PROTO_VERSION),
|
|
addrKnown(5000, 0.001),
|
|
setInventoryKnown(SendBufferSize() / 1000)
|
|
{
|
|
nServices = 0;
|
|
hSocket = hSocketIn;
|
|
nRecvVersion = INIT_PROTO_VERSION;
|
|
nLastSend = 0;
|
|
nLastRecv = 0;
|
|
nSendBytes = 0;
|
|
nRecvBytes = 0;
|
|
nTimeConnected = GetTime();
|
|
nTimeOffset = 0;
|
|
addr = addrIn;
|
|
addrName = addrNameIn == "" ? addr.ToStringIPPort() : addrNameIn;
|
|
nVersion = 0;
|
|
strSubVer = "";
|
|
fWhitelisted = false;
|
|
fOneShot = false;
|
|
fClient = false; // set by version message
|
|
fInbound = fInboundIn;
|
|
fNetworkNode = false;
|
|
fSuccessfullyConnected = false;
|
|
fDisconnect = false;
|
|
nRefCount = 0;
|
|
nSendSize = 0;
|
|
nSendOffset = 0;
|
|
hashContinue = uint256();
|
|
nStartingHeight = -1;
|
|
fGetAddr = false;
|
|
fRelayTxes = false;
|
|
pfilter = new CBloomFilter();
|
|
nPingNonceSent = 0;
|
|
nPingUsecStart = 0;
|
|
nPingUsecTime = 0;
|
|
fPingQueued = false;
|
|
|
|
{
|
|
LOCK(cs_nLastNodeId);
|
|
id = nLastNodeId++;
|
|
}
|
|
|
|
if (fLogIPs)
|
|
LogPrint("net", "Added connection to %s peer=%d\n", addrName, id);
|
|
else
|
|
LogPrint("net", "Added connection peer=%d\n", id);
|
|
|
|
// Be shy and don't send version until we hear
|
|
if (hSocket != INVALID_SOCKET && !fInbound)
|
|
PushVersion();
|
|
|
|
GetNodeSignals().InitializeNode(GetId(), this);
|
|
}
|
|
|
|
CNode::~CNode()
|
|
{
|
|
CloseSocket(hSocket);
|
|
|
|
if (pfilter)
|
|
delete pfilter;
|
|
|
|
GetNodeSignals().FinalizeNode(GetId());
|
|
}
|
|
|
|
void CNode::AskFor(const CInv& inv)
|
|
{
|
|
if (mapAskFor.size() > MAPASKFOR_MAX_SZ)
|
|
return;
|
|
// We're using mapAskFor as a priority queue,
|
|
// the key is the earliest time the request can be sent
|
|
int64_t nRequestTime;
|
|
limitedmap<CInv, int64_t>::const_iterator it = mapAlreadyAskedFor.find(inv);
|
|
if (it != mapAlreadyAskedFor.end())
|
|
nRequestTime = it->second;
|
|
else
|
|
nRequestTime = 0;
|
|
LogPrint("net", "askfor %s %d (%s) peer=%d\n", inv.ToString(), nRequestTime, DateTimeStrFormat("%H:%M:%S", nRequestTime/1000000), id);
|
|
|
|
// Make sure not to reuse time indexes to keep things in the same order
|
|
int64_t nNow = GetTimeMicros() - 1000000;
|
|
static int64_t nLastTime;
|
|
++nLastTime;
|
|
nNow = std::max(nNow, nLastTime);
|
|
nLastTime = nNow;
|
|
|
|
// Each retry is 2 minutes after the last
|
|
nRequestTime = std::max(nRequestTime + 2 * 60 * 1000000, nNow);
|
|
if (it != mapAlreadyAskedFor.end())
|
|
mapAlreadyAskedFor.update(it, nRequestTime);
|
|
else
|
|
mapAlreadyAskedFor.insert(std::make_pair(inv, nRequestTime));
|
|
mapAskFor.insert(std::make_pair(nRequestTime, inv));
|
|
}
|
|
|
|
void CNode::BeginMessage(const char* pszCommand) EXCLUSIVE_LOCK_FUNCTION(cs_vSend)
|
|
{
|
|
ENTER_CRITICAL_SECTION(cs_vSend);
|
|
assert(ssSend.size() == 0);
|
|
ssSend << CMessageHeader(Params().MessageStart(), pszCommand, 0);
|
|
LogPrint("net", "sending: %s ", SanitizeString(pszCommand));
|
|
}
|
|
|
|
void CNode::AbortMessage() UNLOCK_FUNCTION(cs_vSend)
|
|
{
|
|
ssSend.clear();
|
|
|
|
LEAVE_CRITICAL_SECTION(cs_vSend);
|
|
|
|
LogPrint("net", "(aborted)\n");
|
|
}
|
|
|
|
void CNode::EndMessage() UNLOCK_FUNCTION(cs_vSend)
|
|
{
|
|
// The -*messagestest options are intentionally not documented in the help message,
|
|
// since they are only used during development to debug the networking code and are
|
|
// not intended for end-users.
|
|
if (mapArgs.count("-dropmessagestest") && GetRand(GetArg("-dropmessagestest", 2)) == 0)
|
|
{
|
|
LogPrint("net", "dropmessages DROPPING SEND MESSAGE\n");
|
|
AbortMessage();
|
|
return;
|
|
}
|
|
if (mapArgs.count("-fuzzmessagestest"))
|
|
Fuzz(GetArg("-fuzzmessagestest", 10));
|
|
|
|
if (ssSend.size() == 0)
|
|
{
|
|
LEAVE_CRITICAL_SECTION(cs_vSend);
|
|
return;
|
|
}
|
|
// Set the size
|
|
unsigned int nSize = ssSend.size() - CMessageHeader::HEADER_SIZE;
|
|
WriteLE32((uint8_t*)&ssSend[CMessageHeader::MESSAGE_SIZE_OFFSET], nSize);
|
|
|
|
// Set the checksum
|
|
uint256 hash = Hash(ssSend.begin() + CMessageHeader::HEADER_SIZE, ssSend.end());
|
|
unsigned int nChecksum = 0;
|
|
memcpy(&nChecksum, &hash, sizeof(nChecksum));
|
|
assert(ssSend.size () >= CMessageHeader::CHECKSUM_OFFSET + sizeof(nChecksum));
|
|
memcpy((char*)&ssSend[CMessageHeader::CHECKSUM_OFFSET], &nChecksum, sizeof(nChecksum));
|
|
|
|
LogPrint("net", "(%d bytes) peer=%d\n", nSize, id);
|
|
|
|
std::deque<CSerializeData>::iterator it = vSendMsg.insert(vSendMsg.end(), CSerializeData());
|
|
ssSend.GetAndClear(*it);
|
|
nSendSize += (*it).size();
|
|
|
|
// If write queue empty, attempt "optimistic write"
|
|
if (it == vSendMsg.begin())
|
|
SocketSendData(this);
|
|
|
|
LEAVE_CRITICAL_SECTION(cs_vSend);
|
|
}
|
|
|
|
//
|
|
// CBanDB
|
|
//
|
|
|
|
CBanDB::CBanDB()
|
|
{
|
|
pathBanlist = GetDataDir() / "banlist.dat";
|
|
}
|
|
|
|
bool CBanDB::Write(const banmap_t& banSet)
|
|
{
|
|
// Generate random temporary filename
|
|
unsigned short randv = 0;
|
|
GetRandBytes((unsigned char*)&randv, sizeof(randv));
|
|
std::string tmpfn = strprintf("banlist.dat.%04x", randv);
|
|
|
|
// serialize banlist, checksum data up to that point, then append csum
|
|
CDataStream ssBanlist(SER_DISK, CLIENT_VERSION);
|
|
ssBanlist << FLATDATA(Params().MessageStart());
|
|
ssBanlist << banSet;
|
|
uint256 hash = Hash(ssBanlist.begin(), ssBanlist.end());
|
|
ssBanlist << 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(file, SER_DISK, CLIENT_VERSION);
|
|
if (fileout.IsNull())
|
|
return error("%s: Failed to open file %s", __func__, pathTmp.string());
|
|
|
|
// Write and commit header, data
|
|
try {
|
|
fileout << ssBanlist;
|
|
}
|
|
catch (const std::exception& e) {
|
|
return error("%s: Serialize or I/O error - %s", __func__, e.what());
|
|
}
|
|
FileCommit(fileout.Get());
|
|
fileout.fclose();
|
|
|
|
// replace existing banlist.dat, if any, with new banlist.dat.XXXX
|
|
if (!RenameOver(pathTmp, pathBanlist))
|
|
return error("%s: Rename-into-place failed", __func__);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CBanDB::Read(banmap_t& banSet)
|
|
{
|
|
// open input file, and associate with CAutoFile
|
|
FILE *file = fopen(pathBanlist.string().c_str(), "rb");
|
|
CAutoFile filein(file, SER_DISK, CLIENT_VERSION);
|
|
if (filein.IsNull())
|
|
return error("%s: Failed to open file %s", __func__, pathBanlist.string());
|
|
|
|
// use file size to size memory buffer
|
|
uint64_t fileSize = boost::filesystem::file_size(pathBanlist);
|
|
uint64_t dataSize = 0;
|
|
// Don't try to resize to a negative number if file is small
|
|
if (fileSize >= sizeof(uint256))
|
|
dataSize = fileSize - sizeof(uint256);
|
|
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 (const std::exception& e) {
|
|
return error("%s: Deserialize or I/O error - %s", __func__, e.what());
|
|
}
|
|
filein.fclose();
|
|
|
|
CDataStream ssBanlist(vchData, SER_DISK, CLIENT_VERSION);
|
|
|
|
// verify stored checksum matches input data
|
|
uint256 hashTmp = Hash(ssBanlist.begin(), ssBanlist.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 ..
|
|
ssBanlist >> 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
|
|
ssBanlist >> banSet;
|
|
}
|
|
catch (const std::exception& e) {
|
|
return error("%s: Deserialize or I/O error - %s", __func__, e.what());
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void DumpBanlist()
|
|
{
|
|
int64_t nStart = GetTimeMillis();
|
|
|
|
CNode::SweepBanned(); //clean unused entries (if bantime has expired)
|
|
|
|
CBanDB bandb;
|
|
banmap_t banmap;
|
|
CNode::GetBanned(banmap);
|
|
bandb.Write(banmap);
|
|
|
|
LogPrint("net", "Flushed %d banned node ips/subnets to banlist.dat %dms\n",
|
|
banmap.size(), GetTimeMillis() - nStart);
|
|
}
|