Hush Full Node software. We were censored from Github, this is where all development happens now.
https://hush.is
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2933 lines
94 KiB
2933 lines
94 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2014 The Bitcoin Core developers
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// Copyright (c) 2016-2023 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 "init.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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extern int32_t HUSH_TESTNODE;
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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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// This is every 2 blocks, on avg, on HUSH3
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#define DUMP_ZINDEX_INTERVAL 150
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#define CHECK_PLZ_STOP_INTERVAL 120
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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;
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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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CZindexStats zstats;
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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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std::atomic<bool> fNetworkActive = { true };
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bool setBannedIsDirty = false;
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bool GetNetworkActive() { return fNetworkActive; };
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extern void StartShutdown();
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/**
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* I2P SAM session.
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* Used to accept incoming and make outgoing I2P connections.
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*/
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std::unique_ptr<i2p::sam::Session> m_i2p_sam_session;
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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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// Denial-of-service detection/prevention
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// Key is IP address, value is banned-until-time
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banmap_t setBanned;
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CCriticalSection cs_setBanned;
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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 CNode& peer)
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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(peer.addr);
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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 serialized seeds into usable address objects.
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static std::vector<CAddress> ConvertSeeds(const std::vector<uint8_t> &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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CDataStream s(vSeedsIn, SER_NETWORK, PROTOCOL_VERSION | ADDRV2_FORMAT);
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while (!s.eof()) {
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CService endpoint;
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s >> endpoint;
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CAddress addr{endpoint, NODE_NETWORK};
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addr.nTime = GetTime() - nOneWeek;
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LogPrint("net", "Added hardcoded seed: %s\n", addr.ToString());
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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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CService GetLocalAddress(const CNode& peer)
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{
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CAddress ret(CService(CNetAddr(),GetListenPort()),0);
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CService addr;
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if (GetLocal(addr, peer)) {
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ret = CAddress(addr);
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}
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ret.nServices = nLocalServices;
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ret.nTime = GetTime();
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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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IsReachable(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) };
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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 (!IsReachable(addr))
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return false;
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//Add our local addresses to addrman to distribute to other nodes
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addrman.Add(CAddress(addr), addr);
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addrman.Connected(addr);
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addrman.SetLocal(addr);
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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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/** 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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void SetReachable(enum Network net, bool reachable)
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{
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if (net == NET_UNROUTABLE || net == NET_INTERNAL)
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return;
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LOCK(cs_mapLocalHost);
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vfLimited[net] = !reachable;
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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.Add(CAddress(addr),addr); //Add address if not alread in addrman (picks up addnodes)
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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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for (CNode* pnode : vNodes) {
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if (static_cast<CNetAddr>(pnode->addr) == ip) {
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return pnode;
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}
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}
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return nullptr;
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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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for (CNode* pnode : vNodes) {
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if (subNet.Match(static_cast<CNetAddr>(pnode->addr))) {
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return pnode;
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}
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}
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return nullptr;
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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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for (CNode* pnode : vNodes) {
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if (pnode->addrName == addrName) {
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return pnode;
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}
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}
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return nullptr;
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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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static CAddress GetBindAddress(SOCKET sock)
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{
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CAddress addr_bind;
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struct sockaddr_storage sockaddr_bind;
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socklen_t sockaddr_bind_len = sizeof(sockaddr_bind);
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if (sock != INVALID_SOCKET) {
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if (!getsockname(sock, (struct sockaddr*)&sockaddr_bind, &sockaddr_bind_len)) {
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addr_bind.SetSockAddr((const struct sockaddr*)&sockaddr_bind);
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} else {
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LogPrintf("Warning: getsockname failed\n");
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}
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}
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return addr_bind;
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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(static_cast<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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bool connected = false;
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std::unique_ptr<Sock> sock;
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if (!addrConnect.IsValid()) {
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return NULL;
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}
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if (!IsReachable(addrConnect)) {
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return NULL;
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}
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if (addrConnect.GetNetwork() == NET_I2P && m_i2p_sam_session.get() != nullptr) {
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i2p::Connection conn;
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if (m_i2p_sam_session->Connect(addrConnect, conn, proxyConnectionFailed)) {
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connected = true;
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sock = std::move(conn.sock);
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hSocket = sock->Release();
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// addr_bind = CAddress{conn.me, NODE_NONE};
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}
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} else if (pszDest) {
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connected = ConnectSocketByName(addrConnect, hSocket, pszDest, Params().GetDefaultPort(), nConnectTimeout, &proxyConnectionFailed);
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} else {
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connected = ConnectSocket(addrConnect, hSocket, nConnectTimeout, &proxyConnectionFailed);
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}
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if (connected)
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{
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if (!IsSelectableSocket(hSocket)) {
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LogPrintf("Cannot create connection: non-selectable socket created (fd >= FD_SETSIZE ?)\n");
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CloseSocket(hSocket);
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return NULL;
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}
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addrman.Attempt(addrConnect);
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WOLFSSL *ssl = NULL;
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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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// 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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pnode->nTimeConnected = GetTime();
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return pnode;
|
|
} else if (!proxyConnectionFailed) {
|
|
// If connecting to the node failed, and failure is not caused by a problem connecting to
|
|
// the proxy, mark this as an attempt.
|
|
addrman.Attempt(addrConnect);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void CNode::CloseSocketDisconnect()
|
|
{
|
|
fDisconnect = true;
|
|
|
|
{
|
|
LOCK(cs_hSocket);
|
|
|
|
if (hSocket != INVALID_SOCKET)
|
|
{
|
|
try
|
|
{
|
|
LogPrint("net", "disconnecting peer=%d\n", id);
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
{
|
|
LOCK(cs_addrKnown);
|
|
addrKnown.reset();
|
|
}
|
|
|
|
// 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(), addr.nServices));
|
|
CNode *addr = this;
|
|
CService service = GetLocalAddress(*addr);
|
|
CAddress addrMe(service);
|
|
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(NetMsgType::VERSION, PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
|
|
nLocalHostNonce, strSubVersion, nBestHeight, true);
|
|
}
|
|
|
|
void DumpBanlist()
|
|
{
|
|
SweepBanned(); // clean unused entries (if bantime has expired)
|
|
|
|
if (!BannedSetIsDirty())
|
|
return;
|
|
|
|
int64_t nStart = GetTimeMillis();
|
|
|
|
CBanDB bandb;
|
|
banmap_t banmap;
|
|
GetBanned(banmap);
|
|
if (bandb.Write(banmap)) {
|
|
SetBannedSetDirty(false);
|
|
}
|
|
fprintf(stderr,"%s: Dumping banlist with %lu items\n", __func__, banmap.size());
|
|
|
|
LogPrint("net", "Flushed %d banned node ips/subnets to banlist.dat %dms\n",
|
|
banmap.size(), GetTimeMillis() - nStart);
|
|
}
|
|
|
|
void CNode::ClearBanned()
|
|
{
|
|
{
|
|
LOCK(cs_setBanned);
|
|
setBanned.clear();
|
|
setBannedIsDirty = true;
|
|
}
|
|
DumpBanlist(); //store banlist to disk
|
|
}
|
|
|
|
|
|
bool CNode::IsBanned(CNetAddr ip)
|
|
{
|
|
bool fResult = false;
|
|
{
|
|
LOCK(cs_setBanned);
|
|
for (banmap_t::iterator it = setBanned.begin(); it != setBanned.end(); it++)
|
|
{
|
|
CSubNet subNet = (*it).first;
|
|
CBanEntry banEntry = (*it).second;
|
|
|
|
if(subNet.Match(ip) && GetTime() < banEntry.nBanUntil) {
|
|
fprintf(stderr,"%s: found banned subnet %s\n", __func__, subNet.ToString().c_str());
|
|
fResult = true;
|
|
}
|
|
}
|
|
}
|
|
return fResult;
|
|
}
|
|
|
|
bool CNode::IsBanned(CSubNet subnet)
|
|
{
|
|
bool fResult = false;
|
|
{
|
|
LOCK(cs_setBanned);
|
|
banmap_t::iterator i = setBanned.find(subnet);
|
|
if (i != setBanned.end())
|
|
{
|
|
CBanEntry banEntry = (*i).second;
|
|
if (GetTime() < banEntry.nBanUntil)
|
|
fResult = true;
|
|
}
|
|
}
|
|
return fResult;
|
|
}
|
|
|
|
void CNode::Ban(const CNetAddr& addr, const BanReason &banReason, int64_t bantimeoffset, bool sinceUnixEpoch) {
|
|
CSubNet subNet(addr);
|
|
Ban(subNet, banReason, bantimeoffset, sinceUnixEpoch);
|
|
}
|
|
|
|
void CNode::Ban(const CSubNet& subNet, const BanReason &banReason, int64_t bantimeoffset, bool sinceUnixEpoch) {
|
|
CBanEntry banEntry(GetTime()+GetArg("-bantime", 60*60*24)); // Default 24-hour ban
|
|
if (bantimeoffset > 0)
|
|
banEntry.nBanUntil = (sinceUnixEpoch ? 0 : GetTime() )+bantimeoffset;
|
|
|
|
fprintf(stderr, "%s: banning %s until %ld with bantimeoffset=%ld sinceUnixEpoch=%d\n", __func__, subNet.ToString().c_str(), banEntry.nBanUntil, bantimeoffset, sinceUnixEpoch);
|
|
{
|
|
LOCK(cs_setBanned);
|
|
if (setBanned[subNet].nBanUntil < banEntry.nBanUntil) {
|
|
setBanned[subNet] = banEntry;
|
|
setBannedIsDirty = true;
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (CNode* pnode : vNodes) {
|
|
if (subNet.Match(static_cast<CNetAddr>(pnode->addr)))
|
|
fprintf(stderr, "%s: disconnecting from banned node %s\n", __func__, pnode->addr.ToString().c_str() );
|
|
pnode->fDisconnect = true;
|
|
}
|
|
}
|
|
|
|
if(banReason == BanReasonManuallyAdded) {
|
|
fprintf(stderr,"%s: dumping banlist after manual ban\n", __func__);
|
|
DumpBanlist(); //store banlist to disk immediately if user requested ban
|
|
}
|
|
}
|
|
|
|
bool CNode::Unban(const CNetAddr &addr) {
|
|
CSubNet subNet(addr);
|
|
return Unban(subNet);
|
|
}
|
|
|
|
bool CNode::Unban(const CSubNet &subNet) {
|
|
{
|
|
LOCK(cs_setBanned);
|
|
if (!setBanned.erase(subNet))
|
|
return false;
|
|
setBannedIsDirty = true;
|
|
}
|
|
DumpBanlist(); //store banlist to disk immediately
|
|
return true;
|
|
}
|
|
|
|
void GetBanned(banmap_t &banMap)
|
|
{
|
|
LOCK(cs_setBanned);
|
|
// Sweep the banlist so expired bans are not returned
|
|
SweepBanned();
|
|
banMap = setBanned; //create a thread safe copy
|
|
}
|
|
|
|
void SetBanned(const banmap_t &banMap)
|
|
{
|
|
LOCK(cs_setBanned);
|
|
setBanned = banMap;
|
|
setBannedIsDirty = true;
|
|
}
|
|
|
|
void SweepBanned()
|
|
{
|
|
int64_t now = GetTime();
|
|
//fprintf(stderr,"%s: Sweeping banlist\n", __func__);
|
|
|
|
LOCK(cs_setBanned);
|
|
banmap_t::iterator it = setBanned.begin();
|
|
while(it != setBanned.end())
|
|
{
|
|
CSubNet subNet = (*it).first;
|
|
CBanEntry banEntry = (*it).second;
|
|
if(now > banEntry.nBanUntil)
|
|
{
|
|
setBanned.erase(it++);
|
|
setBannedIsDirty = true;
|
|
LogPrint("net", "%s: Removed banned node ip/subnet from banlist.dat: %s\n", __func__, subNet.ToString());
|
|
} else {
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool BannedSetIsDirty()
|
|
{
|
|
LOCK(cs_setBanned);
|
|
return setBannedIsDirty;
|
|
}
|
|
|
|
void SetBannedSetDirty(bool dirty)
|
|
{
|
|
LOCK(cs_setBanned); //reuse setBanned lock for the isDirty flag
|
|
setBannedIsDirty = dirty;
|
|
}
|
|
|
|
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.dMinPing = (((double)nMinPingUsecTime) / 1e6);
|
|
stats.dPingWait = (((double)nPingUsecWait) / 1e6);
|
|
stats.m_addr_processed = m_addr_processed.load();
|
|
stats.m_addr_rate_limited = m_addr_rate_limited.load();
|
|
|
|
|
|
// 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);
|
|
}
|
|
|
|
stats.m_wants_addrv2 = m_wants_addrv2;
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
void V1TransportSerializer::prepareForTransport(CSerializedNetMsg& msg, std::vector<unsigned char>& header) {
|
|
// create dbl-sha256 checksum
|
|
uint256 hash = Hash(msg.data.begin(), msg.data.end());
|
|
|
|
// create header
|
|
CMessageHeader hdr(Params().MessageStart(), msg.m_type.c_str(), msg.data.size());
|
|
// memcpy(hdr.nChecksum, hash.begin(), CMessageHeader::CHECKSUM_SIZE);
|
|
memcpy(&hdr.nChecksum, hash.begin(), CMessageHeader::CHECKSUM_SIZE);
|
|
// serialize header
|
|
header.reserve(CMessageHeader::HEADER_SIZE);
|
|
CVectorWriter{SER_NETWORK, INIT_PROTO_VERSION, header, 0, hdr};
|
|
}
|
|
|
|
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;
|
|
|
|
if (hSocket == INVALID_SOCKET) {
|
|
const int nErr = WSAGetLastError();
|
|
if (nErr != WSAEWOULDBLOCK) {
|
|
LogPrintf("socket error accept failed: %s\n", NetworkErrorString(nErr));
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr)) {
|
|
LogPrintf("Warning: Unknown socket family\n");
|
|
}
|
|
|
|
const CAddress addr_bind = GetBindAddress(hSocket);
|
|
|
|
bool allowlisted = hListenSocket.allowlisted || CNode::IsAllowlistedRange(addr);
|
|
|
|
CreateNodeFromAcceptedSocket(hSocket, allowlisted, addr_bind, addr);
|
|
}
|
|
|
|
void CreateNodeFromAcceptedSocket(SOCKET hSocket,
|
|
bool allowlisted,
|
|
const CAddress& addr_bind,
|
|
const CAddress& addr)
|
|
{
|
|
struct sockaddr_storage sockaddr;
|
|
socklen_t len = sizeof(sockaddr);
|
|
// SOCKET hSocket = accept(hListenSocket.socket, (struct sockaddr*)&sockaddr, &len);
|
|
// CAddress addr;
|
|
int nInboundThisIP = 0;
|
|
int nInbound = 0;
|
|
int nMaxInbound = nMaxConnections - (MAX_OUTBOUND_CONNECTIONS + MAX_FEELER_CONNECTIONS);
|
|
|
|
{
|
|
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 (!fNetworkActive) {
|
|
LogPrintf("connection from %s dropped: not accepting new connections\n", addr.ToString());
|
|
CloseSocket(hSocket);
|
|
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 (!IsReachable(addr))
|
|
{
|
|
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->nPingRetry > MAX_PING_RETRY)
|
|
{
|
|
LogPrintf("ping max retry exceeded, disconnecting node %i\n", pnode->id);
|
|
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, 256, true))
|
|
{
|
|
BOOST_FOREACH(const CNetAddr& ip, vIPs)
|
|
{
|
|
int nOneDay = 24*3600;
|
|
CAddress addr = CAddress(CService(ip, ASSETCHAINS_P2PPORT));
|
|
addr.nTime = GetTime() - 3*nOneDay - GetRand(4*nOneDay); // use a random age between 3 and 7 days old
|
|
vAdd.push_back(addr);
|
|
}
|
|
}
|
|
// TODO: The seed name resolve may fail, yielding an IP of [::], which results in
|
|
// addrman assigning the same source to results from different seeds.
|
|
// This should switch to a hard-coded stable dummy IP for each seed name, so that the
|
|
// resolve is not required at all.
|
|
if (!vIPs.empty()) {
|
|
CService seedSource;
|
|
Lookup(seed.name.c_str(), seedSource, 0, true);
|
|
addrman.Add(vAdd, seedSource);
|
|
}
|
|
}
|
|
}
|
|
|
|
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 DumpZindexStats()
|
|
{
|
|
int64_t nStart = GetTimeMillis();
|
|
|
|
CZindexDB zdb;
|
|
zdb.Write(zstats);
|
|
|
|
LogPrintf("Flushed stats at height %li to zindex.dat %dms\n", zstats.Height(), GetTimeMillis() - nStart);
|
|
}
|
|
|
|
void CheckIfWeShouldStop()
|
|
{
|
|
// If the RPC interface is "stuck", such as filling up with deadlocks
|
|
// and cannot process any more requests, the only option was to kill the full node.
|
|
// This is a disk-based method where a node can realize it should stop, and which
|
|
// can help avoid extremely long rescans
|
|
if(boost::filesystem::exists(GetDataDir() / "plz_stop")) {
|
|
LogPrintf("%s: Found plz_stop file, shutting down...\n", __func__);
|
|
StartShutdown();
|
|
}
|
|
}
|
|
|
|
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");
|
|
std::vector<CAddress> vFixedSeeds = ConvertSeeds(Params().FixedSeeds());
|
|
BOOST_FOREACH(CAddress fixedSeed, vFixedSeeds) {
|
|
std::vector<CAddress> vFixedSeed;
|
|
vFixedSeed.push_back(fixedSeed);
|
|
CService seedSource;
|
|
Lookup(fixedSeed.ToString().c_str(), seedSource, Params().GetDefaultPort(), false);
|
|
addrman.Add(vFixedSeed, seedSource);
|
|
}
|
|
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) {
|
|
if (ShutdownRequested())
|
|
break;
|
|
|
|
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 (!IsReachable(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, CSemaphoreGrant *grantOutbound, const char *pszDest, bool fOneShot, bool fFeeler)
|
|
{
|
|
// Initiate outbound network connection
|
|
boost::this_thread::interruption_point();
|
|
if (!fNetworkActive) {
|
|
return false;
|
|
}
|
|
|
|
if (!IsReachable(addrConnect)) {
|
|
return false;
|
|
}
|
|
|
|
if (!pszDest) {
|
|
if (IsLocal(addrConnect) ||
|
|
FindNode(static_cast<CNetAddr>(addrConnect)) || CNode::IsBanned(addrConnect) ||
|
|
FindNode(addrConnect.ToStringIPPort()))
|
|
return false;
|
|
} else if (FindNode(std::string(pszDest)))
|
|
return false;
|
|
|
|
CNode* pnode = ConnectNode(addrConnect, pszDest);
|
|
boost::this_thread::interruption_point();
|
|
|
|
if (!pnode)
|
|
return false;
|
|
if (grantOutbound)
|
|
grantOutbound->MoveTo(pnode->grantOutbound);
|
|
pnode->fNetworkNode = true;
|
|
|
|
if (fOneShot)
|
|
pnode->fOneShot = true;
|
|
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;
|
|
|
|
// Randomize the order in which we process messages from/to our peers.
|
|
// This prevents attacks in which an attacker exploits having multiple
|
|
// consecutive connections in the vNodes list.
|
|
random_shuffle(vNodesCopy.begin(), vNodesCopy.end(), GetRandInt);
|
|
|
|
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));
|
|
}
|
|
}
|
|
|
|
void ThreadI2PCheck()
|
|
{
|
|
const int64_t wait_time = 5000;
|
|
const int64_t err_wait_cap = wait_time * 60;
|
|
auto err_wait = wait_time;
|
|
|
|
bool advertising_listen_addr = false;
|
|
i2p::Connection conn;
|
|
|
|
while (true) {
|
|
|
|
MilliSleep(wait_time);
|
|
|
|
boost::this_thread::interruption_point();
|
|
|
|
if (!m_i2p_sam_session->Check()) {
|
|
|
|
MilliSleep(err_wait);
|
|
|
|
if (err_wait < err_wait_cap) {
|
|
err_wait *= 2;
|
|
}
|
|
|
|
} else {
|
|
err_wait = wait_time;
|
|
}
|
|
}
|
|
}
|
|
|
|
void ThreadI2PAcceptIncoming()
|
|
{
|
|
const int64_t err_wait_begin = 1000;
|
|
const int64_t err_wait_cap = 1000 * 60 * 5;
|
|
auto err_wait = err_wait_begin;
|
|
|
|
bool advertising_listen_addr = false;
|
|
i2p::Connection conn;
|
|
|
|
while (true) {
|
|
|
|
boost::this_thread::interruption_point();
|
|
|
|
if (!m_i2p_sam_session->Listen(conn)) {
|
|
if (advertising_listen_addr && conn.me.IsValid()) {
|
|
RemoveLocal(conn.me);
|
|
advertising_listen_addr = false;
|
|
}
|
|
|
|
MilliSleep(err_wait);
|
|
|
|
if (err_wait < err_wait_cap) {
|
|
err_wait *= 2;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (!advertising_listen_addr) {
|
|
AddLocal(conn.me, LOCAL_MANUAL);
|
|
advertising_listen_addr = true;
|
|
}
|
|
|
|
if (!m_i2p_sam_session->Accept(conn)) {
|
|
continue;
|
|
}
|
|
|
|
CreateNodeFromAcceptedSocket(conn.sock->Release(), false,
|
|
CAddress{conn.me, NODE_NETWORK}, CAddress{conn.peer, NODE_NETWORK});
|
|
}
|
|
}
|
|
|
|
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, 0, false))
|
|
{
|
|
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 LoadPeers() {
|
|
uiInterface.InitMessage(_("Loading addresses..."));
|
|
// Load addresses for peers.dat
|
|
int64_t nStart = GetTimeMillis();
|
|
{
|
|
CAddrDB adb;
|
|
if (!adb.Read(addrman)) {
|
|
addrman.Clear();
|
|
LogPrintf("Invalid or missing peers.dat; recreating\n");
|
|
}
|
|
}
|
|
LogPrintf("Loaded %i addresses from peers.dat %dms\n",
|
|
addrman.size(), GetTimeMillis() - nStart);
|
|
fAddressesInitialized = true;
|
|
}
|
|
|
|
//extern CWallet pwalletMain;
|
|
void StartNode(boost::thread_group& threadGroup, CScheduler& scheduler)
|
|
{
|
|
|
|
CheckIfWeShouldStop();
|
|
|
|
if (GetBoolArg("-nspv_msg", DEFAULT_NSPV_PROCESSING)) {
|
|
nLocalServices |= NODE_NSPV;
|
|
LogPrintf("NSPV messages processing enabled\n");
|
|
}
|
|
|
|
proxyType i2p_sam;
|
|
if (GetProxy(NET_I2P, i2p_sam)) {
|
|
m_i2p_sam_session = std::unique_ptr<i2p::sam::Session>(new i2p::sam::Session(GetDataDir() / "i2p_private_key",
|
|
i2p_sam.proxy));
|
|
}
|
|
|
|
if (fZindex) {
|
|
uiInterface.InitMessage(_("Loading zindex stats..."));
|
|
int64_t nStart = GetTimeMillis();
|
|
{
|
|
CZindexDB zdb;
|
|
if (!zdb.Read(zstats)) {
|
|
// The first time nodes use zindex.dat code, no file will be found
|
|
// TODO: rescan if invalid only
|
|
LogPrintf("Invalid or missing zindex.dat! Generating new...\n");
|
|
|
|
//bool update = true;
|
|
//pwalletMain->ScanForWalletTransactions(chainActive.Genesis(),update);
|
|
|
|
// We assume this is the first startup with zindex.dat code, and serialize current data to disk.
|
|
DumpZindexStats();
|
|
|
|
// Now read-in the stats we just wrote to disk to memory
|
|
if(!zdb.Read(zstats)) {
|
|
LogPrintf("Invalid or missing zindex.dat! Stats may be corrupt\n");
|
|
} else {
|
|
LogPrintf("Loaded stats at height %li from zindex.dat %dms\n", zstats.Height(), GetTimeMillis() - nStart);
|
|
}
|
|
} else {
|
|
LogPrintf("Loaded stats at height %li from zindex.dat %dms\n", zstats.Height(), GetTimeMillis() - nStart);
|
|
}
|
|
}
|
|
}
|
|
|
|
uiInterface.InitMessage(_("Loading addresses..."));
|
|
int64_t nStart = GetTimeMillis();
|
|
fprintf(stderr, "%s: Loading addresses for peers.dat at %ld\n", __func__, nStart);
|
|
{
|
|
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) {
|
|
CNetAddr local;
|
|
LookupHost("127.0.0.1", local, false);
|
|
pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress(CService(local, 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));
|
|
|
|
//Listen for I2P connections, or periodically check the i2p control port.
|
|
if (m_i2p_sam_session.get() != nullptr) {
|
|
if (GetBoolArg("-i2pacceptincoming", true) ) {
|
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "i2paccept", &ThreadI2PAcceptIncoming));
|
|
} else {
|
|
threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "i2pcheck", &ThreadI2PCheck));
|
|
}
|
|
}
|
|
|
|
// 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);
|
|
|
|
// Dump zindex stats if -zindex is enabled
|
|
if (fZindex) {
|
|
scheduler.scheduleEvery(&DumpZindexStats, DUMP_ZINDEX_INTERVAL);
|
|
}
|
|
|
|
// Dump network addresses
|
|
scheduler.scheduleEvery(&DumpAddresses, DUMP_ADDRESSES_INTERVAL);
|
|
|
|
scheduler.scheduleEvery(&CheckIfWeShouldStop, CHECK_PLZ_STOP_INTERVAL);
|
|
}
|
|
|
|
bool StopNode()
|
|
{
|
|
LogPrintf("StopNode()\n");
|
|
if (semOutbound)
|
|
for (int i=0; i<(MAX_OUTBOUND_CONNECTIONS + MAX_FEELER_CONNECTIONS); i++)
|
|
semOutbound->post();
|
|
|
|
// persist current zindex stats to disk before we exit
|
|
DumpZindexStats();
|
|
|
|
if (HUSH_NSPV_FULLNODE && fAddressesInitialized)
|
|
{
|
|
DumpAddresses();
|
|
fAddressesInitialized = false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static class CNetCleanup
|
|
{
|
|
public:
|
|
CNetCleanup() {}
|
|
|
|
~CNetCleanup()
|
|
{
|
|
// Close sockets
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
if (pnode->hSocket != INVALID_SOCKET)
|
|
CloseSocket(pnode->hSocket);
|
|
BOOST_FOREACH(ListenSocket& hListenSocket, vhListenSocket)
|
|
if (hListenSocket.socket != INVALID_SOCKET)
|
|
if (!CloseSocket(hListenSocket.socket))
|
|
LogPrintf("CloseSocket(hListenSocket) failed with error %s\n", NetworkErrorString(WSAGetLastError()));
|
|
|
|
// clean up some globals (to help leak detection)
|
|
BOOST_FOREACH(CNode *pnode, vNodes)
|
|
delete pnode;
|
|
BOOST_FOREACH(CNode *pnode, vNodesDisconnected)
|
|
delete pnode;
|
|
vNodes.clear();
|
|
vNodesDisconnected.clear();
|
|
vhListenSocket.clear();
|
|
delete semOutbound;
|
|
semOutbound = NULL;
|
|
delete pnodeLocalHost;
|
|
pnodeLocalHost = NULL;
|
|
|
|
#ifdef _WIN32
|
|
// Shutdown Windows Sockets
|
|
WSACleanup();
|
|
#endif
|
|
}
|
|
}
|
|
instance_of_cnetcleanup;
|
|
|
|
void RelayTransaction(const CTransaction& tx)
|
|
{
|
|
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
|
|
ss.reserve(10000);
|
|
ss << tx;
|
|
RelayTransaction(tx, ss);
|
|
}
|
|
|
|
void RelayTransaction(const CTransaction& tx, const CDataStream& ss)
|
|
{
|
|
CInv inv(MSG_TX, tx.GetHash());
|
|
{
|
|
LOCK(cs_mapRelay);
|
|
// Expire old relay messages
|
|
while (!vRelayExpiration.empty() && vRelayExpiration.front().first < GetTime())
|
|
{
|
|
mapRelay.erase(vRelayExpiration.front().second);
|
|
vRelayExpiration.pop_front();
|
|
}
|
|
|
|
// Save original serialized message so newer versions are preserved
|
|
mapRelay.insert(std::make_pair(inv, ss));
|
|
vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, inv));
|
|
}
|
|
LOCK(cs_vNodes);
|
|
|
|
auto vRelayNodes = vNodes;
|
|
|
|
// If we have no nodes to relay to, there is nothing to do
|
|
if(vNodes.size() == 0) {
|
|
fprintf(stderr, "%s: No nodes to relay to!\n", __func__ );
|
|
return;
|
|
}
|
|
|
|
// 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);
|
|
if (HUSH_TESTNODE==1 && vNodes.size() == 0) {
|
|
fprintf(stderr, "%s: -testnode=1, no peers, not relaying\n", __func__ );
|
|
return;
|
|
} else {
|
|
fprintf(stderr, "%s: Relaying to %lu of %lu peers\n", __func__, newSize, vNodes.size() );
|
|
}
|
|
|
|
// Only relay to randomly chosen 50% of peers
|
|
BOOST_FOREACH(CNode* pnode, vRelayNodes)
|
|
{
|
|
//TODO: correct fix is to correctly LOCK vRelayNodes
|
|
if(!pnode)
|
|
continue;
|
|
|
|
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 in %s", __func__, pathAddr.string());
|
|
|
|
// 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;
|
|
nPingRetry = 0;
|
|
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);
|
|
|
|
m_serializer = std::unique_ptr<V1TransportSerializer>(new V1TransportSerializer());
|
|
}
|
|
|
|
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 CNode::PushAddrMessage(CSerializedNetMsg&& msg)
|
|
{
|
|
size_t nMessageSize = msg.data.size();
|
|
LogPrint("net", "sending %s (%d bytes) peer=%d\n", SanitizeString(msg.m_type), nMessageSize, GetId());
|
|
|
|
// make sure we use the appropriate network transport format
|
|
std::vector<unsigned char> serializedHeader;
|
|
m_serializer->prepareForTransport(msg, serializedHeader);
|
|
size_t nTotalSize = nMessageSize + serializedHeader.size();
|
|
{
|
|
LOCK(cs_vSend);
|
|
//log total amount of bytes per message type
|
|
mapSendBytesPerMsgCmd[msg.m_type] += nTotalSize;
|
|
nSendSize += nTotalSize;
|
|
|
|
// if (nSendSize > nSendBufferMaxSize) fPauseSend = true;
|
|
|
|
//Add Header
|
|
std::deque<CSerializeData>::iterator it = vSendMsg.insert(vSendMsg.end(), CSerializeData());
|
|
CSerializeData &d = *it;
|
|
d.insert(d.end(), serializedHeader.begin(), serializedHeader.end());
|
|
|
|
//Add Message
|
|
if (nMessageSize) {
|
|
d.insert(d.end(), msg.data.begin(), msg.data.end());
|
|
}
|
|
|
|
if (it == vSendMsg.begin())
|
|
SocketSendData(this);
|
|
}
|
|
}
|
|
|
|
size_t GetNodeCount(NumConnections flags)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
if (flags == CONNECTIONS_ALL) // Shortcut if we want total
|
|
return vNodes.size();
|
|
|
|
int nNum = 0;
|
|
for (const auto& pnode : vNodes) {
|
|
if (flags & (pnode->fInbound ? CONNECTIONS_IN : CONNECTIONS_OUT)) {
|
|
nNum++;
|
|
}
|
|
}
|
|
|
|
return nNum;
|
|
}
|
|
|
|
void SetNetworkActive(bool active)
|
|
{
|
|
LogPrint("net", "SetNetworkActive: %s\n", active);
|
|
|
|
if (fNetworkActive == active) {
|
|
return;
|
|
}
|
|
|
|
fNetworkActive = active;
|
|
|
|
if (!fNetworkActive) {
|
|
LOCK(cs_vNodes);
|
|
// Close sockets to all nodes
|
|
for (CNode* pnode : vNodes) {
|
|
pnode->CloseSocketDisconnect();
|
|
}
|
|
}
|
|
|
|
// uiInterface.NotifyNetworkActiveChanged(fNetworkActive);
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|