2438 lines
79 KiB
C++
2438 lines
79 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2014 The Bitcoin Core developers
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// Copyright (c) 2016-2021 The Hush developers
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// Distributed under the GPLv3 software license, see the accompanying
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// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
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/******************************************************************************
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* Copyright © 2014-2019 The SuperNET Developers. *
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* *
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* See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at *
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* the top-level directory of this distribution for the individual copyright *
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* holder information and the developer policies on copyright and licensing. *
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* *
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* Unless otherwise agreed in a custom licensing agreement, no part of the *
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* SuperNET software, including this file may be copied, modified, propagated *
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* or distributed except according to the terms contained in the LICENSE file *
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* *
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* Removal or modification of this copyright notice is prohibited. *
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* *
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******************************************************************************/
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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 "main.h"
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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 "primitives/transaction.h"
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#include "scheduler.h"
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#include "ui_interface.h"
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#include "crypto/common.h"
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#include "hush/utiltls.h"
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#include <random.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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#include <boost/filesystem.hpp>
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#include <boost/thread.hpp>
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#include <wolfssl/options.h>
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#include <wolfssl/ssl.h>
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#include <hush/tlsmanager.cpp>
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using namespace hush;
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// Dump addresses to peers.dat every 5 minutes (300s)
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// Satoshi originally used 10 seconds(!), did they know something Peter Wuille didn't?
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#define DUMP_ADDRESSES_INTERVAL 300
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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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// We add a random period time (0 to 1 seconds) to feeler connections to prevent synchronization.
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#define FEELER_SLEEP_WINDOW 1
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#define USE_TLS "encrypted as fuck"
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#if defined(USE_TLS) && !defined(TLS1_3_VERSION)
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// minimum secure protocol is 1.3
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// TLS1_3_VERSION is defined in openssl/tls1.h
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#error "ERROR: Your WolfSSL version does not support TLS v1.3!!!"
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#endif
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using namespace std;
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namespace {
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int MAX_OUTBOUND_CONNECTIONS = GetArg("-maxoutboundconnections",64);
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int MAX_FEELER_CONNECTIONS = GetArg("-maxfeelerconnections",1);
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int MAX_INBOUND_FROMIP = GetArg("-maxinboundfromip",3);
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struct ListenSocket {
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SOCKET socket;
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bool allowlisted;
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ListenSocket(SOCKET socket, bool allowlisted) : socket(socket), allowlisted(allowlisted) {}
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};
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}
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// Global state variables
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extern uint16_t ASSETCHAINS_P2PPORT;
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extern char SMART_CHAIN_SYMBOL[65];
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bool fDiscover = true;
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bool fListen = true;
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uint64_t nLocalServices = NODE_NETWORK | NODE_NSPV;
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CCriticalSection cs_mapLocalHost;
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map<CNetAddr, LocalServiceInfo> mapLocalHost;
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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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TLSManager tlsmanager = TLSManager();
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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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static CCriticalSection cs_vOneShots;
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static set<CNetAddr> setservAddNodeAddresses;
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static 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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static 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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// WolfSSL server and client contexts
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WOLFSSL_CTX *tls_ctx_server, *tls_ctx_client;
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static bool operator==(_NODE_ADDR a, _NODE_ADDR b)
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{
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return (a.ipAddr == b.ipAddr);
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}
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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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//printf("Listenport.%u\n",Params().GetDefaultPort());
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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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//TODO: option to set custom services
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ret.nServices = nLocalServices;
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// Round to the nearest 5 min window to avoid fingerprinting -- Duke
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ret.nTime = GetTime() - (GetTime() % 300);
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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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LogPrintf("AdvertizeLocal: advertizing address %s\n", addrLocal.ToString());
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pnode->PushAddress(addrLocal);
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}
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}
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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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}
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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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bool RemoveLocal(const CService& addr)
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{
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LOCK(cs_mapLocalHost);
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LogPrintf("RemoveLocal(%s)\n", addr.ToString());
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mapLocalHost.erase(addr);
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return true;
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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 !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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CNode::eTlsOption CNode::tlsFallbackNonTls = CNode::eTlsOption::FALLBACK_FALSE;
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CNode::eTlsOption CNode::tlsValidate = CNode::eTlsOption::FALLBACK_UNSET;
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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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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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LogPrint("net", "trying connection %s lastseen=%.1fhrs\n",
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pszDest ? pszDest : addrConnect.ToString(),
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pszDest ? 0.0 : (double)(GetTime() - 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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|
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addrman.Attempt(addrConnect);
|
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|
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WOLFSSL *ssl = NULL;
|
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|
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/* TCP connection is ready. Do client side SSL. */
|
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unsigned long err_code = 0;
|
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ssl = tlsmanager.connect(hSocket, addrConnect, err_code);
|
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if(!ssl) {
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LogPrint("tls", "%s():%d - err_code %x, connection to %s failed)\n", __func__, __LINE__, err_code, addrConnect.ToStringIP());
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CloseSocket(hSocket);
|
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return NULL;
|
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}
|
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|
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// Add node
|
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CNode* pnode = new CNode(hSocket, addrConnect, pszDest ? pszDest : "", false, ssl);
|
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pnode->tls_cipher = wolfSSL_get_cipher_name(ssl);
|
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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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|
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pnode->nTimeConnected = GetTime();
|
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|
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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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}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
void CNode::CloseSocketDisconnect()
|
||
{
|
||
fDisconnect = true;
|
||
|
||
{
|
||
LOCK(cs_hSocket);
|
||
|
||
if (hSocket != INVALID_SOCKET)
|
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{
|
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try
|
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{
|
||
LogPrint("net", "disconnecting peer=%d\n", id);
|
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}
|
||
catch(std::bad_alloc&)
|
||
{
|
||
// when the node is shutting down, the call above might use invalid memory resulting in a
|
||
// std::bad_alloc exception when instantiating internal objs for handling log category
|
||
LogPrintf("(node is probably shutting down) disconnecting peer=%d\n", id);
|
||
}
|
||
|
||
if (ssl) {
|
||
unsigned long err_code = 0;
|
||
tlsmanager.waitFor(SSL_SHUTDOWN, hSocket, ssl, (DEFAULT_CONNECT_TIMEOUT / 1000), err_code);
|
||
wolfSSL_free(ssl);
|
||
ssl = NULL;
|
||
}
|
||
CloseSocket(hSocket);
|
||
}
|
||
}
|
||
|
||
// in case this fails, we'll empty the recv buffer when the CNode is deleted
|
||
TRY_LOCK(cs_vRecvMsg, lockRecv);
|
||
if (lockRecv)
|
||
vRecvMsg.clear();
|
||
}
|
||
|
||
extern int32_t HUSH_NSPV;
|
||
#ifndef HUSH_NSPV_FULLNODE
|
||
#define HUSH_NSPV_FULLNODE (HUSH_NSPV <= 0)
|
||
#endif // !HUSH_NSPV_FULLNODE
|
||
|
||
#ifndef HUSH_NSPV_SUPERLITE
|
||
#define HUSH_NSPV_SUPERLITE (HUSH_NSPV > 0)
|
||
#endif // !HUSH_NSPV_SUPERLITE
|
||
|
||
void CNode::PushVersion()
|
||
{
|
||
int nBestHeight = g_signals.GetHeight().get_value_or(0);
|
||
|
||
int64_t nTime = (fInbound ? GetTime() : GetTime());
|
||
CAddress addrYou = (addr.IsRoutable() && !IsProxy(addr) ? addr : CAddress(CService("0.0.0.0",0)));
|
||
CAddress addrMe = GetLocalAddress(&addr);
|
||
GetRandBytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
|
||
if (fLogIPs)
|
||
LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), addrYou.ToString(), id);
|
||
else
|
||
LogPrint("net", "send version message: version %d, blocks=%d, us=%s, peer=%d\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString(), id);
|
||
PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
|
||
nLocalHostNonce, strSubVersion, nBestHeight, true);
|
||
//fprintf(stderr,"HUSH_NSPV.%d PUSH services.%llx\n",HUSH_NSPV,(long long)nLocalServices);
|
||
}
|
||
|
||
std::map<CSubNet, int64_t> CNode::setBanned;
|
||
CCriticalSection CNode::cs_setBanned;
|
||
|
||
void CNode::ClearBanned()
|
||
{
|
||
LOCK(cs_setBanned);
|
||
setBanned.clear();
|
||
}
|
||
|
||
bool CNode::IsBanned(CNetAddr ip)
|
||
{
|
||
bool fResult = false;
|
||
{
|
||
LOCK(cs_setBanned);
|
||
for (std::map<CSubNet, int64_t>::iterator it = setBanned.begin(); it != setBanned.end(); it++)
|
||
{
|
||
CSubNet subNet = (*it).first;
|
||
int64_t t = (*it).second;
|
||
|
||
if(subNet.Match(ip) && GetTime() < t)
|
||
fResult = true;
|
||
}
|
||
}
|
||
return fResult;
|
||
}
|
||
|
||
bool CNode::IsBanned(CSubNet subnet)
|
||
{
|
||
bool fResult = false;
|
||
{
|
||
LOCK(cs_setBanned);
|
||
std::map<CSubNet, int64_t>::iterator i = setBanned.find(subnet);
|
||
if (i != setBanned.end())
|
||
{
|
||
int64_t t = (*i).second;
|
||
if (GetTime() < t)
|
||
fResult = true;
|
||
}
|
||
}
|
||
return fResult;
|
||
}
|
||
|
||
void CNode::Ban(const CNetAddr& addr, int64_t bantimeoffset, bool sinceUnixEpoch) {
|
||
CSubNet subNet(addr.ToString()+(addr.IsIPv4() ? "/32" : "/128"));
|
||
Ban(subNet, bantimeoffset, sinceUnixEpoch);
|
||
}
|
||
|
||
void CNode::Ban(const CSubNet& subNet, int64_t bantimeoffset, bool sinceUnixEpoch) {
|
||
int64_t banTime = GetTime()+GetArg("-bantime", 60*60*24); // Default 24-hour ban
|
||
if (bantimeoffset > 0)
|
||
banTime = (sinceUnixEpoch ? 0 : GetTime() )+bantimeoffset;
|
||
|
||
LOCK(cs_setBanned);
|
||
if (setBanned[subNet] < banTime)
|
||
setBanned[subNet] = banTime;
|
||
}
|
||
|
||
bool CNode::Unban(const CNetAddr &addr) {
|
||
CSubNet subNet(addr.ToString()+(addr.IsIPv4() ? "/32" : "/128"));
|
||
return Unban(subNet);
|
||
}
|
||
|
||
bool CNode::Unban(const CSubNet &subNet) {
|
||
LOCK(cs_setBanned);
|
||
if (setBanned.erase(subNet))
|
||
return true;
|
||
return false;
|
||
}
|
||
|
||
void CNode::GetBanned(std::map<CSubNet, int64_t> &banMap)
|
||
{
|
||
LOCK(cs_setBanned);
|
||
banMap = setBanned; //create a thread safe copy
|
||
}
|
||
|
||
|
||
std::vector<CSubNet> CNode::vAllowlistedRange;
|
||
CCriticalSection CNode::cs_vAllowlistedRange;
|
||
|
||
bool CNode::IsAllowlistedRange(const CNetAddr &addr) {
|
||
LOCK(cs_vAllowlistedRange);
|
||
BOOST_FOREACH(const CSubNet& subnet, vAllowlistedRange) {
|
||
if (subnet.Match(addr))
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
void CNode::AddAllowlistedRange(const CSubNet &subnet) {
|
||
LOCK(cs_vAllowlistedRange);
|
||
vAllowlistedRange.push_back(subnet);
|
||
}
|
||
|
||
void CNode::copyStats(CNodeStats &stats, const std::vector<bool> &m_asmap)
|
||
{
|
||
stats.nodeid = this->GetId();
|
||
stats.nServices = nServices;
|
||
stats.addr = addr;
|
||
// stats.addrBind = addrBind;
|
||
stats.m_mapped_as = addr.GetMappedAS(m_asmap);
|
||
stats.nLastSend = nLastSend;
|
||
stats.nLastRecv = nLastRecv;
|
||
stats.nTimeConnected = nTimeConnected;
|
||
stats.nTimeOffset = nTimeOffset;
|
||
stats.addrName = addrName;
|
||
stats.nVersion = nVersion;
|
||
stats.cleanSubVer = cleanSubVer;
|
||
stats.fInbound = fInbound;
|
||
stats.nStartingHeight = nStartingHeight;
|
||
stats.nSendBytes = nSendBytes;
|
||
stats.nRecvBytes = nRecvBytes;
|
||
stats.fAllowlisted = fAllowlisted;
|
||
stats.tls_cipher = tls_cipher;
|
||
|
||
// 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 (Hush 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() : "";
|
||
|
||
// If ssl != NULL it means TLS connection was established successfully
|
||
{
|
||
LOCK(cs_hSocket);
|
||
stats.fTLSEstablished = (ssl != NULL) && (wolfSSL_is_init_finished(ssl) == 1);
|
||
}
|
||
}
|
||
|
||
// 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);
|
||
|
||
bool bIsSSL = false;
|
||
int nBytes = 0, nRet = 0;
|
||
{
|
||
LOCK(pnode->cs_hSocket);
|
||
|
||
if (pnode->hSocket == INVALID_SOCKET)
|
||
{
|
||
LogPrint("net", "Send: connection with %s is already closed\n", pnode->addr.ToString());
|
||
break;
|
||
}
|
||
|
||
bIsSSL = (pnode->ssl != NULL);
|
||
|
||
if (bIsSSL)
|
||
{
|
||
wolfSSL_ERR_clear_error(); // clear the error queue, otherwise we may be reading an old error that occurred previously in the current thread
|
||
nBytes = wolfSSL_write(pnode->ssl, &data[pnode->nSendOffset], data.size() - pnode->nSendOffset);
|
||
nRet = wolfSSL_get_error(pnode->ssl, nBytes);
|
||
}
|
||
else
|
||
{
|
||
nBytes = send(pnode->hSocket, &data[pnode->nSendOffset], data.size() - pnode->nSendOffset, MSG_NOSIGNAL | MSG_DONTWAIT);
|
||
nRet = WSAGetLastError();
|
||
}
|
||
}
|
||
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
|
||
if (bIsSSL)
|
||
{
|
||
if (nRet != WOLFSSL_ERROR_WANT_READ && nRet != WOLFSSL_ERROR_WANT_WRITE)
|
||
{
|
||
LogPrintf("ERROR: SSL_write %s; closing connection\n", wolfSSL_ERR_error_string(nRet, NULL));
|
||
pnode->CloseSocketDisconnect();
|
||
} else {
|
||
// preventive measure from exhausting CPU usage
|
||
MilliSleep(1); // 1 msec
|
||
}
|
||
} else {
|
||
if (nRet != WSAEWOULDBLOCK && nRet != WSAEMSGSIZE && nRet != WSAEINTR && nRet != WSAEINPROGRESS)
|
||
{
|
||
LogPrintf("ERROR: send %s; closing connection\n", NetworkErrorString(nRet));
|
||
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(addrman.m_asmap);
|
||
vchGroupB = b->addr.GetGroup(addrman.m_asmap);
|
||
|
||
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->fAllowlisted)
|
||
continue;
|
||
if (!node->fInbound)
|
||
continue;
|
||
if (node->fDisconnect)
|
||
continue;
|
||
vEvictionCandidates.push_back(CNodeRef(node));
|
||
}
|
||
}
|
||
|
||
if (vEvictionCandidates.empty()) return false;
|
||
|
||
// Protect connections with certain characteristics
|
||
|
||
// Check version of eviction candidates and prioritize nodes which do not support network upgrade.
|
||
std::vector<CNodeRef> vTmpEvictionCandidates;
|
||
int height;
|
||
{
|
||
LOCK(cs_main);
|
||
height = chainActive.Height();
|
||
}
|
||
|
||
const Consensus::Params& params = Params().GetConsensus();
|
||
auto nextEpoch = NextEpoch(height, params);
|
||
if (nextEpoch) {
|
||
auto idx = nextEpoch.get();
|
||
int nActivationHeight = params.vUpgrades[idx].nActivationHeight;
|
||
|
||
if (nActivationHeight > 0 &&
|
||
height < nActivationHeight &&
|
||
height >= nActivationHeight - NETWORK_UPGRADE_PEER_PREFERENCE_BLOCK_PERIOD)
|
||
{
|
||
// Find any nodes which don't support the protocol version for the next upgrade
|
||
for (const CNodeRef &node : vEvictionCandidates) {
|
||
if (node->nVersion < params.vUpgrades[idx].nProtocolVersion) {
|
||
vTmpEvictionCandidates.push_back(node);
|
||
}
|
||
}
|
||
|
||
// Prioritize these nodes by replacing eviction set with them
|
||
if (vTmpEvictionCandidates.size() > 0) {
|
||
vEvictionCandidates = vTmpEvictionCandidates;
|
||
}
|
||
}
|
||
}
|
||
|
||
// 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 and youngest member.
|
||
// (vEvictionCandidates is already sorted by reverse connect time)
|
||
std::vector<unsigned char> naMostConnections;
|
||
unsigned int nMostConnections = 0;
|
||
int64_t nMostConnectionsTime = 0;
|
||
std::map<std::vector<unsigned char>, std::vector<CNodeRef> > mapAddrCounts;
|
||
BOOST_FOREACH(const CNodeRef &node, vEvictionCandidates) {
|
||
mapAddrCounts[node->addr.GetGroup(addrman.m_asmap)].push_back(node);
|
||
int64_t grouptime = mapAddrCounts[node->addr.GetGroup(addrman.m_asmap)][0]->nTimeConnected;
|
||
size_t groupsize = mapAddrCounts[node->addr.GetGroup(addrman.m_asmap)].size();
|
||
|
||
if (groupsize > nMostConnections || (groupsize == nMostConnections && grouptime > nMostConnectionsTime)) {
|
||
nMostConnections = groupsize;
|
||
nMostConnectionsTime = grouptime;
|
||
naMostConnections = node->addr.GetGroup(addrman.m_asmap);
|
||
}
|
||
}
|
||
|
||
// Reduce to the network group with the most connections
|
||
vEvictionCandidates = mapAddrCounts[naMostConnections];
|
||
|
||
// Do not disconnect peers if there is only one unprotected connection from their network group.
|
||
if (vEvictionCandidates.size() <= 1)
|
||
// unless we prefer the new connection (for allowlisted peers)
|
||
if (!fPreferNewConnection)
|
||
return false;
|
||
|
||
// Disconnect from the network group with the most connections
|
||
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 + MAX_FEELER_CONNECTIONS);
|
||
|
||
if (hSocket != INVALID_SOCKET)
|
||
if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr))
|
||
LogPrintf("Warning: Unknown socket family\n");
|
||
|
||
bool allowlisted = hListenSocket.allowlisted || CNode::IsAllowlistedRange(addr);
|
||
int nInboundThisIP = 0;
|
||
|
||
{
|
||
LOCK(cs_vNodes);
|
||
struct sockaddr_storage tmpsockaddr;
|
||
socklen_t tmplen = sizeof(sockaddr);
|
||
BOOST_FOREACH(CNode* pnode, vNodes)
|
||
{
|
||
if (pnode->fInbound)
|
||
{
|
||
nInbound++;
|
||
if (pnode->addr.GetSockAddr((struct sockaddr*)&tmpsockaddr, &tmplen) && (tmplen == len) && (memcmp(&sockaddr, &tmpsockaddr, tmplen) == 0))
|
||
nInboundThisIP++;
|
||
}
|
||
}
|
||
}
|
||
|
||
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) && !allowlisted)
|
||
{
|
||
LogPrintf("connection from %s dropped (banned)\n", addr.ToString());
|
||
CloseSocket(hSocket);
|
||
return;
|
||
}
|
||
|
||
if (nInbound >= nMaxInbound)
|
||
{
|
||
if (!AttemptToEvictConnection(allowlisted)) {
|
||
// No connection to evict, disconnect the new connection
|
||
LogPrint("net", "failed to find an eviction candidate - connection dropped (full)\n");
|
||
CloseSocket(hSocket);
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (nInboundThisIP >= MAX_INBOUND_FROMIP)
|
||
{
|
||
// No connection to evict, disconnect the new connection
|
||
LogPrint("net", "too many connections from %s, connection refused\n", addr.ToString());
|
||
CloseSocket(hSocket);
|
||
return;
|
||
}
|
||
|
||
// According to the internet TCP_NODELAY is not carried into accepted sockets
|
||
// on all platforms. Set it again here just to be sure.
|
||
int set = 1;
|
||
#ifdef _WIN32
|
||
setsockopt(hSocket, IPPROTO_TCP, TCP_NODELAY, (const char*)&set, sizeof(int));
|
||
#else
|
||
setsockopt(hSocket, IPPROTO_TCP, TCP_NODELAY, (void*)&set, sizeof(int));
|
||
#endif
|
||
|
||
WOLFSSL *ssl = NULL;
|
||
|
||
SetSocketNonBlocking(hSocket, true);
|
||
|
||
/* TCP connection is ready. Do server side TLS */
|
||
unsigned long err_code = 0;
|
||
ssl = tlsmanager.accept( hSocket, addr, err_code);
|
||
if(!ssl)
|
||
{
|
||
LogPrint("tls", "TLS: %s():%d - err_code %x, failure accepting connection from %s\n", __func__, __LINE__, err_code, addr.ToStringIP());
|
||
CloseSocket(hSocket);
|
||
return;
|
||
}
|
||
|
||
CNode* pnode = new CNode(hSocket, addr, "", true, ssl);
|
||
pnode->AddRef();
|
||
pnode->fAllowlisted = allowlisted;
|
||
pnode->tls_cipher = wolfSSL_get_cipher_name(ssl);
|
||
|
||
LogPrint("net", "connection from %s accepted using cipher %s\n", addr.ToString(), pnode->tls_cipher);
|
||
|
||
{
|
||
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)
|
||
{
|
||
LOCK(pnode->cs_hSocket);
|
||
|
||
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 signaling.
|
||
// * 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();
|
||
|
||
if (tlsmanager.threadSocketHandler(pnode,fdsetRecv,fdsetSend,fdsetError)==-1){
|
||
continue;
|
||
}
|
||
|
||
// 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();
|
||
}
|
||
}
|
||
}
|
||
|
||
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
|
||
// only add seeds with the right port
|
||
if (addr.GetPort() == ASSETCHAINS_P2PPORT)
|
||
{
|
||
vAdd.push_back(addr);
|
||
found++;
|
||
LogPrintf("%s: Added node via DNS seed: %s:%d", __FUNCTION__, ip.ToString(), ASSETCHAINS_P2PPORT);
|
||
} else {
|
||
LogPrintf("%s: Node has incorrect port %s:%d", __FUNCTION__, ip.ToString(), addr.GetPort() );
|
||
}
|
||
}
|
||
}
|
||
addrman.Add(vAdd, CNetAddr(seed.name, true));
|
||
}
|
||
}
|
||
|
||
LogPrintf("%d addresses found from DNS seeds\n", found);
|
||
}
|
||
|
||
|
||
void DumpAddresses()
|
||
{
|
||
int64_t nStart = GetTimeMillis();
|
||
|
||
CAddrDB adb;
|
||
adb.Write(addrman);
|
||
|
||
LogPrint("net", "Flushed %d addresses to peers.dat %dms\n", addrman.size(), GetTimeMillis() - nStart);
|
||
}
|
||
|
||
void static ProcessOneShot()
|
||
{
|
||
string strDest;
|
||
{
|
||
LOCK(cs_vOneShots);
|
||
if (vOneShots.empty())
|
||
return;
|
||
strDest = vOneShots.front();
|
||
vOneShots.pop_front();
|
||
}
|
||
CAddress addr;
|
||
CSemaphoreGrant grant(*semOutbound, true);
|
||
if (grant) {
|
||
if (!OpenNetworkConnection(addr, &grant, strDest.c_str(), true))
|
||
AddOneShot(strDest);
|
||
}
|
||
}
|
||
|
||
int64_t PoissonNextSend(int64_t now, int average_interval_seconds)
|
||
{
|
||
return now + (int64_t)(log1p(GetRand(1ULL << 48) * -0.0000000000000035527136788 /* -1/2^48 */) * average_interval_seconds * -1000000.0 + 0.5);
|
||
}
|
||
|
||
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();
|
||
|
||
// Minimum time before next feeler connection (in microseconds).
|
||
int64_t nNextFeeler = PoissonNextSend(nStart*1000*1000, FEELER_INTERVAL);
|
||
|
||
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)) {
|
||
if (GetTime() - nStart > 60) {
|
||
static bool done = false;
|
||
if (!done) {
|
||
LogPrintf("Adding fixed seed nodes.\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. Originally /16 for IPv4, now ASNs via
|
||
// -asmap for ASN bucketing, which is enabled by default
|
||
// 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(addrman.m_asmap));
|
||
nOutbound++;
|
||
}
|
||
}
|
||
}
|
||
assert(nOutbound <= (MAX_OUTBOUND_CONNECTIONS + MAX_FEELER_CONNECTIONS));
|
||
|
||
// "Feeler Connections" as per https://eprint.iacr.org/2015/263.pdf
|
||
// "Eclipse Attacks on Bitcoin’s Peer-to-Peer Network" by
|
||
// Ethan Heilman, Alison Kendler, Aviv Zohar, Sharon Goldberg.
|
||
//
|
||
// Design goals:
|
||
// * Increase the number of connectable addresses in the tried table.
|
||
//
|
||
// Method:
|
||
// * Choose a random address from new and attempt to connect to it if we can connect
|
||
// successfully it is added to tried.
|
||
// * Start attempting feeler connections only after node finishes making outbound
|
||
// connections.
|
||
// * Make feeler connections randomly with 120s average interval via PoissonNextSend.
|
||
// Originally from https://github.com/bitcoin/bitcoin/pull/8282
|
||
// Modified for API changes by Duke Leto
|
||
bool fFeeler = false;
|
||
if (nOutbound >= MAX_OUTBOUND_CONNECTIONS) {
|
||
int64_t nTime = GetTimeMicros(); // The current time right now (in microseconds).
|
||
if (nTime > nNextFeeler) {
|
||
nNextFeeler = PoissonNextSend(nTime, FEELER_INTERVAL);
|
||
fFeeler = true;
|
||
} else {
|
||
continue;
|
||
}
|
||
}
|
||
|
||
int64_t nNow = GetTime();
|
||
int nTries = 0;
|
||
|
||
addrman.ResolveCollisions();
|
||
|
||
while (true) {
|
||
CAddrInfo addr = addrman.SelectTriedCollision();
|
||
|
||
// SelectTriedCollision returns an invalid address if it is empty.
|
||
if (!fFeeler || !addr.IsValid()) {
|
||
addr = addrman.Select(fFeeler);
|
||
}
|
||
|
||
// if we selected an invalid address, restart
|
||
if (!addr.IsValid() || setConnected.count(addr.GetGroup(addrman.m_asmap)) || 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 (nNow - addr.nLastTry < 600 && nTries < 30)
|
||
continue;
|
||
|
||
/* TODO: port this code
|
||
// only consider nodes missing relevant services after 40 failed attempts
|
||
if ((addr.nServices & nRelevantServices) != nRelevantServices && nTries < 40)
|
||
continue;
|
||
*/
|
||
|
||
//TODO: why is this a good thing?
|
||
// 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()) {
|
||
if (fFeeler) {
|
||
// Add small amount of random noise before connection to avoid synchronization
|
||
int randsleep = GetRandInt(FEELER_SLEEP_WINDOW * 1000);
|
||
MilliSleep(randsleep);
|
||
LogPrint("net", "Making feeler connection to %s\n", addrConnect.ToString().c_str());
|
||
printf("%s: Making feeler connection to %s\n", __func__, addrConnect.ToString().c_str());
|
||
}
|
||
|
||
//int failures = setConnected.size() >= std::min(nMaxConnections - 1, 2);
|
||
OpenNetworkConnection(addrConnect,/*failures,*/ &grant, NULL, false, fFeeler);
|
||
}
|
||
}
|
||
}
|
||
|
||
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);
|
||
if ( it != lservAddressesToAdd.begin() )
|
||
it--;
|
||
break;
|
||
}
|
||
if (it == lservAddressesToAdd.end())
|
||
break;
|
||
}
|
||
}
|
||
BOOST_FOREACH(vector<CService>& vserv, lservAddressesToAdd)
|
||
{
|
||
CSemaphoreGrant grant(*semOutbound);
|
||
OpenNetworkConnection(CAddress(vserv[i % vserv.size()]), &grant);
|
||
MilliSleep(500);
|
||
}
|
||
MilliSleep(120000);
|
||
}
|
||
}
|
||
|
||
// if successful, this moves the passed grant to the constructed node
|
||
bool OpenNetworkConnection(const CAddress& addrConnect, /* bool fCountFailure, */ CSemaphoreGrant *grantOutbound, const char *pszDest, bool fOneShot, bool fFeeler)
|
||
{
|
||
// 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);
|
||
//CNode* pnode = ConnectNode(addrConnect, pszDest, fCountFailure);
|
||
boost::this_thread::interruption_point();
|
||
|
||
if (!pnode)
|
||
return false;
|
||
if (grantOutbound)
|
||
grantOutbound->MoveTo(pnode->grantOutbound);
|
||
pnode->fNetworkNode = true;
|
||
|
||
if (fOneShot)
|
||
pnode->fOneShot = true;
|
||
if (fFeeler)
|
||
pnode->fFeeler = 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->fAllowlisted);
|
||
}
|
||
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 fAllowlisted)
|
||
{
|
||
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));
|
||
// Disable Nagle's algorithm
|
||
setsockopt(hListenSocket, IPPROTO_TCP, TCP_NODELAY, (void*)&nOne, sizeof(int));
|
||
#else
|
||
setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (const char*)&nOne, sizeof(int));
|
||
setsockopt(hListenSocket, IPPROTO_TCP, TCP_NODELAY, (const char*)&nOne, sizeof(int));
|
||
#endif
|
||
|
||
// Set to non-blocking, incoming connections will also inherit this
|
||
//
|
||
// WARNING!
|
||
// On Linux, the new socket returned by accept() does not inherit file
|
||
// status flags such as O_NONBLOCK and O_ASYNC from the listening
|
||
// socket. http://man7.org/linux/man-pages/man2/accept.2.html
|
||
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. Hush 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, fAllowlisted));
|
||
|
||
if (addrBind.IsRoutable() && fDiscover && !fAllowlisted)
|
||
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! This can happen when upgrading. Whatevz, recreating\n");
|
||
}
|
||
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 + MAX_FEELER_CONNECTIONS), nMaxConnections);
|
||
semOutbound = new CSemaphore(nMaxOutbound);
|
||
}
|
||
|
||
if (pnodeLocalHost == NULL)
|
||
pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress(CService("127.0.0.1", 0), nLocalServices));
|
||
|
||
Discover(threadGroup);
|
||
|
||
#ifdef USE_TLS
|
||
if (!tlsmanager.prepareCredentials()) {
|
||
LogPrintf("TLS: ERROR: %s: %s: Credentials weren't generated. Node can't be started.\n", __FILE__, __func__);
|
||
return;
|
||
}
|
||
|
||
if (!tlsmanager.initialize()) {
|
||
LogPrintf("TLS: ERROR: %s: %s: TLS initialization failed. Node can't be started.\n", __FILE__, __func__);
|
||
return;
|
||
}
|
||
#else
|
||
return;
|
||
#endif
|
||
|
||
// Start threads
|
||
if (!GetBoolArg("-dnsseed", true))
|
||
LogPrintf("DNS seeding disabled\n");
|
||
else
|
||
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "dnsseed", &ThreadDNSAddressSeed));
|
||
|
||
// 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(&DumpAddresses, DUMP_ADDRESSES_INTERVAL);
|
||
}
|
||
|
||
bool StopNode()
|
||
{
|
||
LogPrintf("StopNode()\n");
|
||
if (semOutbound)
|
||
for (int i=0; i<(MAX_OUTBOUND_CONNECTIONS + MAX_FEELER_CONNECTIONS); i++)
|
||
semOutbound->post();
|
||
|
||
if (HUSH_NSPV_FULLNODE && fAddressesInitialized)
|
||
{
|
||
DumpAddresses();
|
||
fAddressesInitialized = false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
void CNode::NetCleanup()
|
||
{
|
||
// Close sockets
|
||
BOOST_FOREACH(CNode* pnode, vNodes)
|
||
pnode->CloseSocketDisconnect();
|
||
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
|
||
}
|
||
|
||
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);
|
||
|
||
auto vRelayNodes = vNodes;
|
||
|
||
// We always round down, except when we have only 1 connection
|
||
auto newSize = (vNodes.size() / 2) == 0 ? 1 : (vNodes.size() / 2);
|
||
|
||
random_shuffle( vRelayNodes.begin(), vRelayNodes.end(), GetRandInt );
|
||
|
||
vRelayNodes.resize(newSize);
|
||
fprintf(stderr, "%s: Relaying to %lu peers\n", __func__, newSize);
|
||
|
||
// Only relay to randomly chosen 50% of peers
|
||
BOOST_FOREACH(CNode* pnode, vRelayNodes)
|
||
{
|
||
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
|
||
int fileSize = boost::filesystem::file_size(pathAddr);
|
||
int dataSize = fileSize - sizeof(uint256);
|
||
// Don't try to resize to a negative number if file is small
|
||
if (dataSize < 0)
|
||
dataSize = 0;
|
||
vector<unsigned char> vchData;
|
||
vchData.resize(dataSize);
|
||
uint256 hashIn;
|
||
|
||
// read data and checksum from file
|
||
try {
|
||
filein.read((char *)&vchData[0], dataSize);
|
||
filein >> hashIn;
|
||
}
|
||
catch (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, WOLFSSL *sslIn) :
|
||
ssSend(SER_NETWORK, INIT_PROTO_VERSION),
|
||
addrKnown(5000, 0.001),
|
||
setInventoryKnown(SendBufferSize() / 1000)
|
||
{
|
||
ssl = sslIn;
|
||
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 = "";
|
||
fAllowlisted = false;
|
||
fOneShot = false;
|
||
fClient = false; // set by version message
|
||
fFeeler = false;
|
||
fInbound = fInboundIn;
|
||
fNetworkNode = false;
|
||
fSuccessfullyConnected = false;
|
||
fDisconnect = false;
|
||
nRefCount = 0;
|
||
nSendSize = 0;
|
||
nSendOffset = 0;
|
||
hashContinue = uint256();
|
||
nStartingHeight = -1;
|
||
fGetAddr = false;
|
||
fRelayTxes = false;
|
||
fSentAddr = false;
|
||
pfilter = new CBloomFilter();
|
||
nPingNonceSent = 0;
|
||
nPingUsecStart = 0;
|
||
nPingUsecTime = 0;
|
||
fPingQueued = false;
|
||
nMinPingUsecTime = std::numeric_limits<int64_t>::max();
|
||
|
||
{
|
||
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);
|
||
}
|
||
|
||
bool CNode::GetTlsValidate()
|
||
{
|
||
if (tlsValidate == eTlsOption::FALLBACK_UNSET)
|
||
{
|
||
// This is useful for private Hush Smart Chains, that want to exist
|
||
// on a closed VPN with an internal CA or trusted cert system, or
|
||
// various other use cases
|
||
if ( GetBoolArg("-tlsvalidate", false)) {
|
||
LogPrint("tls", "%s():%d - TLS certificates will be validated\n", __func__, __LINE__);
|
||
tlsValidate = eTlsOption::FALLBACK_TRUE;
|
||
} else {
|
||
LogPrint("tls", "%s():%d - TLS certificates will NOT be validated\n", __func__, __LINE__);
|
||
tlsValidate = eTlsOption::FALLBACK_FALSE;
|
||
}
|
||
}
|
||
return (tlsValidate == eTlsOption::FALLBACK_TRUE);
|
||
}
|
||
|
||
CNode::~CNode()
|
||
{
|
||
// No need to make a lock on cs_hSocket, because before deletion CNode object is removed from the vNodes vector, so any other thread hasn't access to it.
|
||
// Removal is synchronized with read and write routines, so all of them will be completed to this moment.
|
||
|
||
if (hSocket != INVALID_SOCKET)
|
||
{
|
||
if (ssl)
|
||
{
|
||
unsigned long err_code = 0;
|
||
tlsmanager.waitFor(SSL_SHUTDOWN, hSocket, ssl, (DEFAULT_CONNECT_TIMEOUT / 1000), err_code);
|
||
|
||
wolfSSL_free(ssl);
|
||
ssl = NULL;
|
||
}
|
||
|
||
CloseSocket(hSocket);
|
||
}
|
||
|
||
if (pfilter)
|
||
delete pfilter;
|
||
|
||
GetNodeSignals().FinalizeNode(GetId());
|
||
}
|
||
|
||
void CNode::AskFor(const CInv& inv)
|
||
{
|
||
if (mapAskFor.size() > MAPASKFOR_MAX_SZ || setAskFor.size() > SETASKFOR_MAX_SZ)
|
||
return;
|
||
// a peer may not have multiple non-responded queue positions for a single inv item
|
||
if (!setAskFor.insert(inv.hash).second)
|
||
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);
|
||
}
|
||
|
||
void CopyNodeStats(std::vector<CNodeStats>& vstats)
|
||
{
|
||
vstats.clear();
|
||
|
||
LOCK(cs_vNodes);
|
||
vstats.reserve(vNodes.size());
|
||
BOOST_FOREACH(CNode* pnode, vNodes) {
|
||
CNodeStats stats;
|
||
pnode->copyStats(stats, addrman.m_asmap);
|
||
vstats.push_back(stats);
|
||
}
|
||
}
|