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a298eb2b93
31b136e5802e1b1e5f9a9589736afe0652f34da2 Don't declare de facto const reference variables as non-const (practicalswift) 1c65c075ee4c7f98d9c1fac5ed7576b96374d4e9 Don't declare de facto const member functions as non-const (practicalswift) Pull request description: _Meta: This is the second and final part of the `const` refactoring series (part one: #20581). **I promise: no more refactoring PRs from me in a while! :)** I'll now go back to focusing on fuzzing/hardening!_ Changes in this PR: * Don't declare de facto const member functions as non-const * Don't declare de facto const reference variables as non-const Awards for finding candidates for the above changes go to: * `clang-tidy`'s [`readability-make-member-function-const`](https://clang.llvm.org/extra/clang-tidy/checks/readability-make-member-function-const.html) check ([list of `clang-tidy` checks](https://clang.llvm.org/extra/clang-tidy/checks/list.html)) * `cppcheck`'s `constVariable` check ([list of `cppcheck` checks](https://sourceforge.net/p/cppcheck/wiki/ListOfChecks/)) See #18920 for instructions on how to analyse Bitcoin Core using Clang Static Analysis, `clang-tidy` and `cppcheck`. ACKs for top commit: ajtowns: ACK 31b136e5802e1b1e5f9a9589736afe0652f34da2 jonatack: ACK 31b136e5802e1b1e5f9a9589736afe0652f34da2 theStack: ACK 31b136e5802e1b1e5f9a9589736afe0652f34da2 ❄️ Tree-SHA512: f58f8f00744219426874379e9f3e9331132b9b48e954d24f3a85cbb858fdcc98009ed42ef7e7b4619ae8af9fc240a6d8bfc1c438db2e97b0ecd722a80dcfeffe
4114 lines
145 KiB
C++
4114 lines
145 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2020 The Bitcoin Core developers
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// Copyright (c) 2014-2023 The Dash Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#if defined(HAVE_CONFIG_H)
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#include <config/bitcoin-config.h>
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#endif
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#include <net.h>
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#include <netmessagemaker.h>
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#include <banman.h>
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#include <clientversion.h>
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#include <compat.h>
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#include <consensus/consensus.h>
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#include <crypto/sha256.h>
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#include <i2p.h>
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#include <net_permissions.h>
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#include <netaddress.h>
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#include <netbase.h>
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#include <random.h>
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#include <scheduler.h>
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#include <ui_interface.h>
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#include <util/sock.h>
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#include <util/strencodings.h>
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#include <util/translation.h>
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#include <validation.h>
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#include <masternode/meta.h>
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#include <masternode/sync.h>
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#include <coinjoin/coinjoin.h>
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#include <evo/deterministicmns.h>
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#include <statsd_client.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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#if HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS
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#include <ifaddrs.h>
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#endif
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#ifdef USE_POLL
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#include <poll.h>
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#endif
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#ifdef USE_EPOLL
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#include <sys/epoll.h>
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#endif
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#ifdef USE_KQUEUE
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#include <sys/event.h>
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#endif
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#include <algorithm>
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#include <cstdint>
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#include <unordered_map>
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#include <math.h>
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// How often to dump addresses to peers.dat
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static constexpr std::chrono::minutes DUMP_PEERS_INTERVAL{15};
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/** Number of DNS seeds to query when the number of connections is low. */
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static constexpr int DNSSEEDS_TO_QUERY_AT_ONCE = 3;
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/** How long to delay before querying DNS seeds
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*
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* If we have more than THRESHOLD entries in addrman, then it's likely
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* that we got those addresses from having previously connected to the P2P
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* network, and that we'll be able to successfully reconnect to the P2P
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* network via contacting one of them. So if that's the case, spend a
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* little longer trying to connect to known peers before querying the
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* DNS seeds.
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*/
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static constexpr std::chrono::seconds DNSSEEDS_DELAY_FEW_PEERS{11};
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static constexpr std::chrono::minutes DNSSEEDS_DELAY_MANY_PEERS{5};
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static constexpr int DNSSEEDS_DELAY_PEER_THRESHOLD = 1000; // "many" vs "few" peers
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/** The default timeframe for -maxuploadtarget. 1 day. */
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static constexpr std::chrono::seconds MAX_UPLOAD_TIMEFRAME{60 * 60 * 24};
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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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/** Used to pass flags to the Bind() function */
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enum BindFlags {
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BF_NONE = 0,
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BF_EXPLICIT = (1U << 0),
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BF_REPORT_ERROR = (1U << 1),
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/**
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* Do not call AddLocal() for our special addresses, e.g., for incoming
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* Tor connections, to prevent gossiping them over the network.
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*/
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BF_DONT_ADVERTISE = (1U << 2),
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};
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#ifndef USE_WAKEUP_PIPE
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// The set of sockets cannot be modified while waiting
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// The sleep time needs to be small to avoid new sockets stalling
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static const uint64_t SELECT_TIMEOUT_MILLISECONDS = 50;
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#else
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// select() is woken up through the wakeup pipe whenever a new node is added, so we can wait much longer.
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// We are however still somewhat limited in how long we can sleep as there is periodic work (cleanup) to be done in
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// the socket handler thread
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static const uint64_t SELECT_TIMEOUT_MILLISECONDS = 500;
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#endif
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const std::string NET_MESSAGE_COMMAND_OTHER = "*other*";
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constexpr const CConnman::CFullyConnectedOnly CConnman::FullyConnectedOnly;
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constexpr const CConnman::CAllNodes CConnman::AllNodes;
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static const uint64_t RANDOMIZER_ID_NETGROUP = 0x6c0edd8036ef4036ULL; // SHA256("netgroup")[0:8]
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static const uint64_t RANDOMIZER_ID_LOCALHOSTNONCE = 0xd93e69e2bbfa5735ULL; // SHA256("localhostnonce")[0:8]
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static const uint64_t RANDOMIZER_ID_ADDRCACHE = 0x1cf2e4ddd306dda9ULL; // SHA256("addrcache")[0:8]
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//
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// Global state variables
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//
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bool fDiscover = true;
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bool fListen = true;
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Mutex g_maplocalhost_mutex;
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std::map<CNetAddr, LocalServiceInfo> mapLocalHost GUARDED_BY(g_maplocalhost_mutex);
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static bool vfLimited[NET_MAX] GUARDED_BY(g_maplocalhost_mutex) = {};
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std::string strSubVersion;
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void CConnman::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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uint16_t GetListenPort()
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{
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return static_cast<uint16_t>(gArgs.GetArg("-port", Params().GetDefaultPort()));
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}
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// find 'best' local address for a particular peer
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bool GetLocal(CService& addr, const CNetAddr *paddrPeer)
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{
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if (!fListen)
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return false;
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int nBestScore = -1;
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int nBestReachability = -1;
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{
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LOCK(g_maplocalhost_mutex);
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for (const auto& entry : mapLocalHost)
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{
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int nScore = entry.second.nScore;
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int nReachability = entry.first.GetReachabilityFrom(paddrPeer);
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if (nReachability > nBestReachability || (nReachability == nBestReachability && nScore > nBestScore))
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{
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addr = CService(entry.first, entry.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 pnSeed6 array into usable address objects.
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static std::vector<CAddress> convertSeed6(const std::vector<SeedSpec6> &vSeedsIn)
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{
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// It'll only connect to one or two seed nodes because once it connects,
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// it'll get a pile of addresses with newer timestamps.
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// Seed nodes are given a random 'last seen time' of between one and two
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// weeks ago.
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const int64_t nOneWeek = 7*24*60*60;
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std::vector<CAddress> vSeedsOut;
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vSeedsOut.reserve(vSeedsIn.size());
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FastRandomContext rng;
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for (const auto& seed_in : vSeedsIn) {
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struct in6_addr ip;
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memcpy(&ip, seed_in.addr, sizeof(ip));
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CAddress addr(CService(ip, seed_in.port), GetDesirableServiceFlags(NODE_NONE));
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addr.nTime = GetTime() - rng.randrange(nOneWeek) - nOneWeek;
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vSeedsOut.push_back(addr);
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}
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return vSeedsOut;
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}
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// get best local address for a particular peer as a CAddress
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// Otherwise, return the unroutable 0.0.0.0 but filled in with
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// the normal parameters, since the IP may be changed to a useful
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// one by discovery.
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CAddress GetLocalAddress(const CNetAddr *paddrPeer, ServiceFlags nLocalServices)
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{
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CAddress ret(CService(CNetAddr(),GetListenPort()), nLocalServices);
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CService addr;
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if (GetLocal(addr, paddrPeer))
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{
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ret = CAddress(addr, nLocalServices);
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}
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ret.nTime = GetAdjustedTime();
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return ret;
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}
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static int GetnScore(const CService& addr)
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{
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LOCK(g_maplocalhost_mutex);
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const auto it = mapLocalHost.find(addr);
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return (it != mapLocalHost.end()) ? it->second.nScore : 0;
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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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CService addrLocal = pnode->GetAddrLocal();
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return fDiscover && pnode->addr.IsRoutable() && addrLocal.IsRoutable() &&
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IsReachable(addrLocal.GetNetwork());
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}
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std::optional<CAddress> GetLocalAddrForPeer(CNode *pnode)
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{
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CAddress addrLocal = GetLocalAddress(&pnode->addr, pnode->GetLocalServices());
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if (gArgs.GetBoolArg("-addrmantest", false)) {
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// use IPv4 loopback during addrmantest
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addrLocal = CAddress(CService(LookupNumeric("127.0.0.1", GetListenPort())), pnode->GetLocalServices());
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}
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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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FastRandomContext rng;
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if (IsPeerAddrLocalGood(pnode) && (!addrLocal.IsRoutable() ||
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rng.randbits((GetnScore(addrLocal) > LOCAL_MANUAL) ? 3 : 1) == 0))
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{
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addrLocal.SetIP(pnode->GetAddrLocal());
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}
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if (addrLocal.IsRoutable() || gArgs.GetBoolArg("-addrmantest", false))
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{
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LogPrint(BCLog::NET, "Advertising address %s to peer=%d\n", addrLocal.ToString(), pnode->GetId());
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return addrLocal;
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}
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// Address is unroutable. Don't advertise.
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return std::nullopt;
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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() && Params().RequireRoutableExternalIP())
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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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LogPrintf("AddLocal(%s,%i)\n", addr.ToString(), nScore);
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{
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LOCK(g_maplocalhost_mutex);
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const auto [it, is_newly_added] = mapLocalHost.emplace(addr, LocalServiceInfo());
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LocalServiceInfo &info = it->second;
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if (is_newly_added || nScore >= info.nScore) {
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info.nScore = nScore + (is_newly_added ? 0 : 1);
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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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void RemoveLocal(const CService& addr)
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{
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LOCK(g_maplocalhost_mutex);
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LogPrintf("RemoveLocal(%s)\n", addr.ToString());
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mapLocalHost.erase(addr);
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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(g_maplocalhost_mutex);
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vfLimited[net] = !reachable;
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}
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bool IsReachable(enum Network net)
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{
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LOCK(g_maplocalhost_mutex);
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return !vfLimited[net];
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}
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bool IsReachable(const CNetAddr &addr)
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{
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return IsReachable(addr.GetNetwork());
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}
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/** vote for a local address */
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bool SeenLocal(const CService& addr)
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{
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LOCK(g_maplocalhost_mutex);
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const auto it = mapLocalHost.find(addr);
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if (it == mapLocalHost.end()) return false;
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++it->second.nScore;
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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(g_maplocalhost_mutex);
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return mapLocalHost.count(addr) > 0;
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}
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CNode* CConnman::FindNode(const CNetAddr& ip, bool fExcludeDisconnecting)
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{
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LOCK(cs_vNodes);
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for (CNode* pnode : vNodes) {
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if (fExcludeDisconnecting && pnode->fDisconnect) {
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continue;
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}
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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* CConnman::FindNode(const CSubNet& subNet, bool fExcludeDisconnecting)
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{
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LOCK(cs_vNodes);
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for (CNode* pnode : vNodes) {
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if (fExcludeDisconnecting && pnode->fDisconnect) {
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continue;
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}
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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* CConnman::FindNode(const std::string& addrName, bool fExcludeDisconnecting)
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{
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LOCK(cs_vNodes);
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for (CNode* pnode : vNodes) {
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if (fExcludeDisconnecting && pnode->fDisconnect) {
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continue;
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}
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if (pnode->GetAddrName() == 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* CConnman::FindNode(const CService& addr, bool fExcludeDisconnecting)
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{
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LOCK(cs_vNodes);
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for (CNode* pnode : vNodes) {
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if (fExcludeDisconnecting && pnode->fDisconnect) {
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continue;
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}
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if (static_cast<CService>(pnode->addr) == 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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bool CConnman::CheckIncomingNonce(uint64_t nonce)
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{
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LOCK(cs_vNodes);
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for (const CNode* pnode : vNodes) {
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if (!pnode->fSuccessfullyConnected && !pnode->fInbound && pnode->GetLocalNonce() == nonce)
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return false;
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}
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return true;
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}
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/** Get the bind address for a socket as CAddress */
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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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LogPrint(BCLog::NET, "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* CConnman::ConnectNode(CAddress addrConnect, const char *pszDest, bool fCountFailure, bool manual_connection, bool block_relay_only)
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{
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if (pszDest == nullptr) {
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bool fAllowLocal = Params().AllowMultiplePorts() && addrConnect.GetPort() != GetListenPort();
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if (!fAllowLocal && IsLocal(addrConnect)) {
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return nullptr;
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}
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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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LogPrintf("Failed to open new connection, already connected\n");
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return nullptr;
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}
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}
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/// debug print
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if (fLogIPs) {
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LogPrint(BCLog::NET, "trying connection %s lastseen=%.1fhrs\n",
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pszDest ? pszDest : addrConnect.ToString(),
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pszDest ? 0.0 : (double)(GetAdjustedTime() - addrConnect.nTime)/3600.0);
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} else {
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LogPrint(BCLog::NET, "trying connection lastseen=%.1fhrs\n",
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pszDest ? 0.0 : (double)(GetAdjustedTime() - addrConnect.nTime)/3600.0);
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}
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// Resolve
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const uint16_t default_port{pszDest != nullptr ? Params().GetDefaultPort(pszDest) :
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Params().GetDefaultPort()};
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if (pszDest) {
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std::vector<CService> resolved;
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if (Lookup(pszDest, resolved, default_port, fNameLookup && !HaveNameProxy(), 256) && !resolved.empty()) {
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addrConnect = CAddress(resolved[GetRand(resolved.size())], NODE_NONE);
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if (!addrConnect.IsValid()) {
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LogPrint(BCLog::NET, "Resolver returned invalid address %s for %s\n", addrConnect.ToString(), pszDest);
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return nullptr;
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}
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// It is possible that we already have a connection to the IP/port pszDest resolved to.
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// In that case, drop the connection that was just created, and return the existing CNode instead.
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// Also store the name we used to connect in that CNode, so that future FindNode() calls to that
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// name catch this early.
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LOCK(cs_vNodes);
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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->MaybeSetAddrName(std::string(pszDest));
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LogPrintf("Failed to open new connection, already connected\n");
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return nullptr;
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}
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}
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}
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// Connect
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bool connected = false;
|
|
std::unique_ptr<Sock> sock;
|
|
proxyType proxy;
|
|
CAddress addr_bind;
|
|
assert(!addr_bind.IsValid());
|
|
|
|
if (addrConnect.IsValid()) {
|
|
bool proxyConnectionFailed = false;
|
|
|
|
if (addrConnect.GetNetwork() == NET_I2P && m_i2p_sam_session.get() != nullptr) {
|
|
i2p::Connection conn;
|
|
if (m_i2p_sam_session->Connect(addrConnect, conn, proxyConnectionFailed)) {
|
|
connected = true;
|
|
sock = std::move(conn.sock);
|
|
addr_bind = CAddress{conn.me, NODE_NONE};
|
|
}
|
|
} else if (GetProxy(addrConnect.GetNetwork(), proxy)) {
|
|
sock = CreateSock(proxy.proxy);
|
|
if (!sock) {
|
|
return nullptr;
|
|
}
|
|
connected = ConnectThroughProxy(proxy, addrConnect.ToStringIP(), addrConnect.GetPort(),
|
|
*sock, nConnectTimeout, proxyConnectionFailed);
|
|
} else {
|
|
// no proxy needed (none set for target network)
|
|
sock = CreateSock(addrConnect);
|
|
if (!sock) {
|
|
return nullptr;
|
|
}
|
|
connected = ConnectSocketDirectly(addrConnect, *sock, nConnectTimeout, manual_connection);
|
|
}
|
|
if (!proxyConnectionFailed) {
|
|
// If a connection to the node was attempted, and failure (if any) is not caused by a problem connecting to
|
|
// the proxy, mark this as an attempt.
|
|
addrman.Attempt(addrConnect, fCountFailure);
|
|
}
|
|
} else if (pszDest && GetNameProxy(proxy)) {
|
|
sock = CreateSock(proxy.proxy);
|
|
if (!sock) {
|
|
return nullptr;
|
|
}
|
|
std::string host;
|
|
uint16_t port{default_port};
|
|
SplitHostPort(std::string(pszDest), port, host);
|
|
bool proxyConnectionFailed;
|
|
connected = ConnectThroughProxy(proxy, host, port, *sock, nConnectTimeout,
|
|
proxyConnectionFailed);
|
|
}
|
|
if (!connected) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Add node
|
|
NodeId id = GetNewNodeId();
|
|
uint64_t nonce = GetDeterministicRandomizer(RANDOMIZER_ID_LOCALHOSTNONCE).Write(id).Finalize();
|
|
if (!addr_bind.IsValid()) {
|
|
addr_bind = GetBindAddress(sock->Get());
|
|
}
|
|
CNode* pnode = new CNode(id, nLocalServices, sock->Release(), addrConnect, CalculateKeyedNetGroup(addrConnect), nonce, addr_bind, pszDest ? pszDest : "", false, block_relay_only);
|
|
pnode->AddRef();
|
|
statsClient.inc("peers.connect", 1.0f);
|
|
|
|
// We're making a new connection, harvest entropy from the time (and our peer count)
|
|
RandAddEvent((uint32_t)id);
|
|
|
|
return pnode;
|
|
}
|
|
|
|
void CNode::CloseSocketDisconnect(CConnman* connman)
|
|
{
|
|
AssertLockHeld(connman->cs_vNodes);
|
|
|
|
fDisconnect = true;
|
|
LOCK(cs_hSocket);
|
|
if (hSocket == INVALID_SOCKET) {
|
|
return;
|
|
}
|
|
|
|
fHasRecvData = false;
|
|
fCanSendData = false;
|
|
|
|
connman->mapSocketToNode.erase(hSocket);
|
|
connman->mapReceivableNodes.erase(GetId());
|
|
connman->mapSendableNodes.erase(GetId());
|
|
{
|
|
LOCK(connman->cs_mapNodesWithDataToSend);
|
|
if (connman->mapNodesWithDataToSend.erase(GetId()) != 0) {
|
|
// See comment in PushMessage
|
|
Release();
|
|
}
|
|
}
|
|
|
|
connman->UnregisterEvents(this);
|
|
|
|
LogPrint(BCLog::NET, "disconnecting peer=%d\n", id);
|
|
CloseSocket(hSocket);
|
|
statsClient.inc("peers.disconnect", 1.0f);
|
|
}
|
|
|
|
void CConnman::AddWhitelistPermissionFlags(NetPermissionFlags& flags, const CNetAddr &addr) const {
|
|
for (const auto& subnet : vWhitelistedRange) {
|
|
if (subnet.m_subnet.Match(addr)) NetPermissions::AddFlag(flags, subnet.m_flags);
|
|
}
|
|
}
|
|
|
|
bool CNode::IsBlockRelayOnly() const {
|
|
bool ignores_incoming_txs{gArgs.GetBoolArg("-blocksonly", DEFAULT_BLOCKSONLY)};
|
|
// Stop processing non-block data early if
|
|
// 1) We are in blocks only mode and peer has no relay permission
|
|
// 2) This peer is a block-relay-only peer
|
|
return (ignores_incoming_txs && !HasPermission(PF_RELAY)) || !IsAddrRelayPeer();
|
|
}
|
|
|
|
std::string CNode::GetAddrName() const {
|
|
LOCK(cs_addrName);
|
|
return addrName;
|
|
}
|
|
|
|
void CNode::MaybeSetAddrName(const std::string& addrNameIn) {
|
|
LOCK(cs_addrName);
|
|
if (addrName.empty()) {
|
|
addrName = addrNameIn;
|
|
}
|
|
}
|
|
|
|
CService CNode::GetAddrLocal() const {
|
|
LOCK(cs_addrLocal);
|
|
return addrLocal;
|
|
}
|
|
|
|
void CNode::SetAddrLocal(const CService& addrLocalIn) {
|
|
LOCK(cs_addrLocal);
|
|
if (addrLocal.IsValid()) {
|
|
error("Addr local already set for node: %i. Refusing to change from %s to %s", id, addrLocal.ToString(), addrLocalIn.ToString());
|
|
} else {
|
|
addrLocal = addrLocalIn;
|
|
}
|
|
}
|
|
|
|
std::string CNode::GetLogString() const
|
|
{
|
|
return fLogIPs ? addr.ToString() : strprintf("%d", id);
|
|
}
|
|
|
|
Network CNode::ConnectedThroughNetwork() const
|
|
{
|
|
return fInbound && m_inbound_onion ? NET_ONION : addr.GetNetClass();
|
|
}
|
|
|
|
#undef X
|
|
#define X(name) stats.name = name
|
|
void CNode::copyStats(CNodeStats &stats, const std::vector<bool> &m_asmap)
|
|
{
|
|
stats.nodeid = this->GetId();
|
|
X(nServices);
|
|
X(addr);
|
|
X(addrBind);
|
|
stats.m_network = GetNetworkName(ConnectedThroughNetwork());
|
|
stats.m_mapped_as = addr.GetMappedAS(m_asmap);
|
|
if (IsAddrRelayPeer()) {
|
|
LOCK(m_tx_relay->cs_filter);
|
|
stats.fRelayTxes = m_tx_relay->fRelayTxes;
|
|
} else {
|
|
stats.fRelayTxes = false;
|
|
}
|
|
X(nLastSend);
|
|
X(nLastRecv);
|
|
X(nTimeConnected);
|
|
X(nTimeOffset);
|
|
stats.addrName = GetAddrName();
|
|
X(nVersion);
|
|
{
|
|
LOCK(cs_SubVer);
|
|
X(cleanSubVer);
|
|
}
|
|
X(fInbound);
|
|
X(m_manual_connection);
|
|
X(nStartingHeight);
|
|
{
|
|
LOCK(cs_vSend);
|
|
X(mapSendBytesPerMsgCmd);
|
|
X(nSendBytes);
|
|
}
|
|
{
|
|
LOCK(cs_vRecv);
|
|
X(mapRecvBytesPerMsgCmd);
|
|
X(nRecvBytes);
|
|
}
|
|
X(m_legacyWhitelisted);
|
|
X(m_permissionFlags);
|
|
|
|
// 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 (Dash users should be well used to small numbers with many decimal places by now :)
|
|
stats.m_ping_usec = nPingUsecTime;
|
|
stats.m_min_ping_usec = nMinPingUsecTime;
|
|
stats.m_ping_wait_usec = nPingUsecWait;
|
|
|
|
// Leave string empty if addrLocal invalid (not filled in yet)
|
|
CService addrLocalUnlocked = GetAddrLocal();
|
|
stats.addrLocal = addrLocalUnlocked.IsValid() ? addrLocalUnlocked.ToString() : "";
|
|
|
|
{
|
|
LOCK(cs_mnauth);
|
|
X(verifiedProRegTxHash);
|
|
X(verifiedPubKeyHash);
|
|
}
|
|
X(m_masternode_connection);
|
|
}
|
|
#undef X
|
|
|
|
bool CNode::ReceiveMsgBytes(Span<const uint8_t> msg_bytes, bool& complete)
|
|
{
|
|
complete = false;
|
|
int64_t nTimeMicros = GetTimeMicros();
|
|
LOCK(cs_vRecv);
|
|
nLastRecv = nTimeMicros / 1000000;
|
|
nRecvBytes += msg_bytes.size();
|
|
while (msg_bytes.size() > 0) {
|
|
// absorb network data
|
|
int handled = m_deserializer->Read(msg_bytes);
|
|
if (handled < 0) {
|
|
// Serious header problem, disconnect from the peer.
|
|
return false;
|
|
}
|
|
|
|
if (m_deserializer->Complete()) {
|
|
// decompose a transport agnostic CNetMessage from the deserializer
|
|
uint32_t out_err_raw_size{0};
|
|
std::optional<CNetMessage> result{m_deserializer->GetMessage(nTimeMicros, out_err_raw_size)};
|
|
if (!result) {
|
|
// Message deserialization failed. Drop the message but don't disconnect the peer.
|
|
// store the size of the corrupt message
|
|
mapRecvBytesPerMsgCmd.find(NET_MESSAGE_COMMAND_OTHER)->second += out_err_raw_size;
|
|
continue;
|
|
}
|
|
|
|
//store received bytes per message command
|
|
//to prevent a memory DOS, only allow valid commands
|
|
mapMsgCmdSize::iterator i = mapRecvBytesPerMsgCmd.find(result->m_command);
|
|
if (i == mapRecvBytesPerMsgCmd.end())
|
|
i = mapRecvBytesPerMsgCmd.find(NET_MESSAGE_COMMAND_OTHER);
|
|
assert(i != mapRecvBytesPerMsgCmd.end());
|
|
i->second += result->m_raw_message_size;
|
|
statsClient.count("bandwidth.message." + std::string(result->m_command) + ".bytesReceived", result->m_raw_message_size, 1.0f);
|
|
|
|
// push the message to the process queue,
|
|
vRecvMsg.push_back(std::move(*result));
|
|
|
|
complete = true;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void CNode::SetSendVersion(int nVersionIn)
|
|
{
|
|
// Send version may only be changed in the version message, and
|
|
// only one version message is allowed per session. We can therefore
|
|
// treat this value as const and even atomic as long as it's only used
|
|
// once a version message has been successfully processed. Any attempt to
|
|
// set this twice is an error.
|
|
if (nSendVersion != 0) {
|
|
error("Send version already set for node: %i. Refusing to change from %i to %i", id, nSendVersion, nVersionIn);
|
|
} else {
|
|
nSendVersion = nVersionIn;
|
|
}
|
|
}
|
|
|
|
int CNode::GetSendVersion() const
|
|
{
|
|
// The send version should always be explicitly set to
|
|
// INIT_PROTO_VERSION rather than using this value until SetSendVersion
|
|
// has been called.
|
|
if (nSendVersion == 0) {
|
|
error("Requesting unset send version for node: %i. Using %i", id, INIT_PROTO_VERSION);
|
|
return INIT_PROTO_VERSION;
|
|
}
|
|
return nSendVersion;
|
|
}
|
|
|
|
int V1TransportDeserializer::readHeader(Span<const uint8_t> msg_bytes)
|
|
{
|
|
// copy data to temporary parsing buffer
|
|
unsigned int nRemaining = 24 - nHdrPos;
|
|
unsigned int nCopy = std::min<unsigned int>(nRemaining, msg_bytes.size());
|
|
|
|
memcpy(&hdrbuf[nHdrPos], msg_bytes.data(), nCopy);
|
|
nHdrPos += nCopy;
|
|
|
|
// if header incomplete, exit
|
|
if (nHdrPos < 24)
|
|
return nCopy;
|
|
|
|
// deserialize to CMessageHeader
|
|
try {
|
|
hdrbuf >> hdr;
|
|
}
|
|
catch (const std::exception&) {
|
|
LogPrint(BCLog::NET, "HEADER ERROR - UNABLE TO DESERIALIZE, peer=%d\n", m_node_id);
|
|
return -1;
|
|
}
|
|
|
|
// Check start string, network magic
|
|
if (memcmp(hdr.pchMessageStart, m_chain_params.MessageStart(), CMessageHeader::MESSAGE_START_SIZE) != 0) {
|
|
LogPrint(BCLog::NET, "HEADER ERROR - MESSAGESTART (%s, %u bytes), received %s, peer=%d\n", hdr.GetCommand(), hdr.nMessageSize, HexStr(hdr.pchMessageStart), m_node_id);
|
|
return -1;
|
|
}
|
|
|
|
// reject messages larger than MAX_SIZE or MAX_PROTOCOL_MESSAGE_LENGTH
|
|
if (hdr.nMessageSize > MAX_SIZE || hdr.nMessageSize > MAX_PROTOCOL_MESSAGE_LENGTH) {
|
|
LogPrint(BCLog::NET, "HEADER ERROR - SIZE (%s, %u bytes), peer=%d\n", hdr.GetCommand(), hdr.nMessageSize, m_node_id);
|
|
return -1;
|
|
}
|
|
|
|
// switch state to reading message data
|
|
in_data = true;
|
|
|
|
return nCopy;
|
|
}
|
|
|
|
int V1TransportDeserializer::readData(Span<const uint8_t> msg_bytes)
|
|
{
|
|
unsigned int nRemaining = hdr.nMessageSize - nDataPos;
|
|
unsigned int nCopy = std::min<unsigned int>(nRemaining, msg_bytes.size());
|
|
|
|
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));
|
|
}
|
|
|
|
hasher.Write(msg_bytes.first(nCopy));
|
|
memcpy(&vRecv[nDataPos], msg_bytes.data(), nCopy);
|
|
nDataPos += nCopy;
|
|
|
|
return nCopy;
|
|
}
|
|
|
|
const uint256& V1TransportDeserializer::GetMessageHash() const
|
|
{
|
|
assert(Complete());
|
|
if (data_hash.IsNull())
|
|
hasher.Finalize(data_hash);
|
|
return data_hash;
|
|
}
|
|
|
|
std::optional<CNetMessage> V1TransportDeserializer::GetMessage(int64_t time, uint32_t& out_err_raw_size)
|
|
{
|
|
// decompose a single CNetMessage from the TransportDeserializer
|
|
std::optional<CNetMessage> msg(std::move(vRecv));
|
|
|
|
// store command string, time, and sizes
|
|
msg->m_command = hdr.GetCommand();
|
|
msg->m_time = time;
|
|
msg->m_message_size = hdr.nMessageSize;
|
|
msg->m_raw_message_size = hdr.nMessageSize + CMessageHeader::HEADER_SIZE;
|
|
|
|
uint256 hash = GetMessageHash();
|
|
|
|
// We just received a message off the wire, harvest entropy from the time (and the message checksum)
|
|
RandAddEvent(ReadLE32(hash.begin()));
|
|
|
|
// Check checksum and header command string
|
|
if (memcmp(hash.begin(), hdr.pchChecksum, CMessageHeader::CHECKSUM_SIZE) != 0) {
|
|
LogPrint(BCLog::NET, "CHECKSUM ERROR (%s, %u bytes), expected %s was %s, peer=%d\n",
|
|
SanitizeString(msg->m_command), msg->m_message_size,
|
|
HexStr(Span<uint8_t>(hash.begin(), hash.begin()+CMessageHeader::CHECKSUM_SIZE)),
|
|
HexStr(Span<uint8_t>(hdr.pchChecksum, hdr.pchChecksum+CMessageHeader::CHECKSUM_SIZE)),
|
|
m_node_id);
|
|
out_err_raw_size = msg->m_raw_message_size;
|
|
msg.reset();
|
|
} else if (!hdr.IsCommandValid()) {
|
|
LogPrint(BCLog::NET, "HEADER ERROR - COMMAND (%s, %u bytes), peer=%d\n",
|
|
hdr.GetCommand(), msg->m_message_size, m_node_id);
|
|
out_err_raw_size = msg->m_raw_message_size;
|
|
msg.reset();
|
|
}
|
|
|
|
// Always reset the network deserializer (prepare for the next message)
|
|
Reset();
|
|
return msg;
|
|
}
|
|
|
|
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.command.c_str(), msg.data.size());
|
|
memcpy(hdr.pchChecksum, hash.begin(), CMessageHeader::CHECKSUM_SIZE);
|
|
|
|
// serialize header
|
|
header.reserve(CMessageHeader::HEADER_SIZE);
|
|
CVectorWriter{SER_NETWORK, INIT_PROTO_VERSION, header, 0, hdr};
|
|
}
|
|
|
|
size_t CConnman::SocketSendData(CNode *pnode) EXCLUSIVE_LOCKS_REQUIRED(pnode->cs_vSend)
|
|
{
|
|
auto it = pnode->vSendMsg.begin();
|
|
size_t nSentSize = 0;
|
|
|
|
while (it != pnode->vSendMsg.end()) {
|
|
const auto &data = *it;
|
|
assert(data.size() > pnode->nSendOffset);
|
|
int nBytes = 0;
|
|
{
|
|
LOCK(pnode->cs_hSocket);
|
|
if (pnode->hSocket == INVALID_SOCKET)
|
|
break;
|
|
nBytes = send(pnode->hSocket, reinterpret_cast<const char*>(data.data()) + pnode->nSendOffset, data.size() - pnode->nSendOffset, MSG_NOSIGNAL | MSG_DONTWAIT);
|
|
}
|
|
if (nBytes > 0) {
|
|
pnode->nLastSend = GetSystemTimeInSeconds();
|
|
pnode->nSendBytes += nBytes;
|
|
pnode->nSendOffset += nBytes;
|
|
nSentSize += nBytes;
|
|
if (pnode->nSendOffset == data.size()) {
|
|
pnode->nSendOffset = 0;
|
|
pnode->nSendSize -= data.size();
|
|
pnode->fPauseSend = pnode->nSendSize > nSendBufferMaxSize;
|
|
it++;
|
|
} else {
|
|
// could not send full message; stop sending more
|
|
pnode->fCanSendData = false;
|
|
break;
|
|
}
|
|
} else {
|
|
if (nBytes < 0) {
|
|
// error
|
|
int nErr = WSAGetLastError();
|
|
if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
|
|
{
|
|
LogPrintf("socket send error %s (peer=%d)\n", NetworkErrorString(nErr), pnode->GetId());
|
|
pnode->fDisconnect = true;
|
|
}
|
|
}
|
|
// couldn't send anything at all
|
|
pnode->fCanSendData = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (it == pnode->vSendMsg.end()) {
|
|
assert(pnode->nSendOffset == 0);
|
|
assert(pnode->nSendSize == 0);
|
|
}
|
|
pnode->vSendMsg.erase(pnode->vSendMsg.begin(), it);
|
|
pnode->nSendMsgSize = pnode->vSendMsg.size();
|
|
return nSentSize;
|
|
}
|
|
|
|
struct NodeEvictionCandidate
|
|
{
|
|
NodeId id;
|
|
int64_t nTimeConnected;
|
|
int64_t nMinPingUsecTime;
|
|
int64_t nLastBlockTime;
|
|
int64_t nLastTXTime;
|
|
bool fRelevantServices;
|
|
bool fRelayTxes;
|
|
bool fBloomFilter;
|
|
uint64_t nKeyedNetGroup;
|
|
bool prefer_evict;
|
|
};
|
|
|
|
static bool ReverseCompareNodeMinPingTime(const NodeEvictionCandidate& a, const NodeEvictionCandidate& b)
|
|
{
|
|
return a.nMinPingUsecTime > b.nMinPingUsecTime;
|
|
}
|
|
|
|
static bool ReverseCompareNodeTimeConnected(const NodeEvictionCandidate& a, const NodeEvictionCandidate& b)
|
|
{
|
|
return a.nTimeConnected > b.nTimeConnected;
|
|
}
|
|
|
|
static bool CompareNetGroupKeyed(const NodeEvictionCandidate &a, const NodeEvictionCandidate &b) {
|
|
return a.nKeyedNetGroup < b.nKeyedNetGroup;
|
|
}
|
|
|
|
static bool CompareNodeBlockTime(const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)
|
|
{
|
|
// There is a fall-through here because it is common for a node to have many peers which have not yet relayed a block.
|
|
if (a.nLastBlockTime != b.nLastBlockTime) return a.nLastBlockTime < b.nLastBlockTime;
|
|
if (a.fRelevantServices != b.fRelevantServices) return b.fRelevantServices;
|
|
return a.nTimeConnected > b.nTimeConnected;
|
|
}
|
|
|
|
static bool CompareNodeTXTime(const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)
|
|
{
|
|
// There is a fall-through here because it is common for a node to have more than a few peers that have not yet relayed txn.
|
|
if (a.nLastTXTime != b.nLastTXTime) return a.nLastTXTime < b.nLastTXTime;
|
|
if (a.fRelayTxes != b.fRelayTxes) return b.fRelayTxes;
|
|
if (a.fBloomFilter != b.fBloomFilter) return a.fBloomFilter;
|
|
return a.nTimeConnected > b.nTimeConnected;
|
|
}
|
|
|
|
|
|
//! Sort an array by the specified comparator, then erase the last K elements.
|
|
template<typename T, typename Comparator>
|
|
static void EraseLastKElements(std::vector<T> &elements, Comparator comparator, size_t k)
|
|
{
|
|
std::sort(elements.begin(), elements.end(), comparator);
|
|
size_t eraseSize = std::min(k, elements.size());
|
|
elements.erase(elements.end() - eraseSize, elements.end());
|
|
}
|
|
|
|
/** Try to find a connection to evict when the node is full.
|
|
* Extreme care must be taken to avoid opening the node to attacker
|
|
* triggered network partitioning.
|
|
* The strategy used here is to protect a small number of peers
|
|
* for each of several distinct characteristics which are difficult
|
|
* to forge. In order to partition a node the attacker must be
|
|
* simultaneously better at all of them than honest peers.
|
|
*/
|
|
bool CConnman::AttemptToEvictConnection()
|
|
{
|
|
std::vector<NodeEvictionCandidate> vEvictionCandidates;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
|
|
for (const CNode* node : vNodes) {
|
|
if (node->HasPermission(PF_NOBAN))
|
|
continue;
|
|
if (!node->fInbound)
|
|
continue;
|
|
if (node->fDisconnect)
|
|
continue;
|
|
|
|
if (fMasternodeMode) {
|
|
// This handles eviction protected nodes. Nodes are always protected for a short time after the connection
|
|
// was accepted. This short time is meant for the VERSION/VERACK exchange and the possible MNAUTH that might
|
|
// follow when the incoming connection is from another masternode. When a message other than MNAUTH
|
|
// is received after VERSION/VERACK, the protection is lifted immediately.
|
|
bool isProtected = GetSystemTimeInSeconds() - node->nTimeConnected < INBOUND_EVICTION_PROTECTION_TIME;
|
|
if (node->nTimeFirstMessageReceived != 0 && !node->fFirstMessageIsMNAUTH) {
|
|
isProtected = false;
|
|
}
|
|
// if MNAUTH was valid, the node is always protected (and at the same time not accounted when
|
|
// checking incoming connection limits)
|
|
if (!node->GetVerifiedProRegTxHash().IsNull()) {
|
|
isProtected = true;
|
|
}
|
|
if (isProtected) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
bool peer_relay_txes = false;
|
|
bool peer_filter_not_null = false;
|
|
if (node->IsAddrRelayPeer()) {
|
|
LOCK(node->m_tx_relay->cs_filter);
|
|
peer_relay_txes = node->m_tx_relay->fRelayTxes;
|
|
peer_filter_not_null = node->m_tx_relay->pfilter != nullptr;
|
|
}
|
|
NodeEvictionCandidate candidate = {node->GetId(), node->nTimeConnected, node->nMinPingUsecTime,
|
|
node->nLastBlockTime, node->nLastTXTime,
|
|
HasAllDesirableServiceFlags(node->nServices),
|
|
peer_relay_txes, peer_filter_not_null, node->nKeyedNetGroup,
|
|
node->m_prefer_evict};
|
|
vEvictionCandidates.push_back(candidate);
|
|
}
|
|
}
|
|
|
|
// Protect connections with certain characteristics
|
|
|
|
// Deterministically select 4 peers to protect by netgroup.
|
|
// An attacker cannot predict which netgroups will be protected
|
|
EraseLastKElements(vEvictionCandidates, CompareNetGroupKeyed, 4);
|
|
// Protect the 8 nodes with the lowest minimum ping time.
|
|
// An attacker cannot manipulate this metric without physically moving nodes closer to the target.
|
|
EraseLastKElements(vEvictionCandidates, ReverseCompareNodeMinPingTime, 8);
|
|
// Protect 4 nodes that most recently sent us novel transactions accepted into our mempool.
|
|
// An attacker cannot manipulate this metric without performing useful work.
|
|
EraseLastKElements(vEvictionCandidates, CompareNodeTXTime, 4);
|
|
// Protect 4 nodes that most recently sent us novel blocks.
|
|
// An attacker cannot manipulate this metric without performing useful work.
|
|
EraseLastKElements(vEvictionCandidates, CompareNodeBlockTime, 4);
|
|
// Protect the half of the remaining nodes which have been connected the longest.
|
|
// This replicates the non-eviction implicit behavior, and precludes attacks that start later.
|
|
EraseLastKElements(vEvictionCandidates, ReverseCompareNodeTimeConnected, vEvictionCandidates.size() / 2);
|
|
|
|
if (vEvictionCandidates.empty()) return false;
|
|
|
|
// If any remaining peers are preferred for eviction consider only them.
|
|
// This happens after the other preferences since if a peer is really the best by other criteria (esp relaying blocks)
|
|
// then we probably don't want to evict it no matter what.
|
|
if (std::any_of(vEvictionCandidates.begin(),vEvictionCandidates.end(),[](NodeEvictionCandidate const &n){return n.prefer_evict;})) {
|
|
vEvictionCandidates.erase(std::remove_if(vEvictionCandidates.begin(),vEvictionCandidates.end(),
|
|
[](NodeEvictionCandidate const &n){return !n.prefer_evict;}),vEvictionCandidates.end());
|
|
}
|
|
|
|
// Identify the network group with the most connections and youngest member.
|
|
// (vEvictionCandidates is already sorted by reverse connect time)
|
|
uint64_t naMostConnections;
|
|
unsigned int nMostConnections = 0;
|
|
int64_t nMostConnectionsTime = 0;
|
|
std::map<uint64_t, std::vector<NodeEvictionCandidate> > mapNetGroupNodes;
|
|
for (const NodeEvictionCandidate &node : vEvictionCandidates) {
|
|
std::vector<NodeEvictionCandidate> &group = mapNetGroupNodes[node.nKeyedNetGroup];
|
|
group.push_back(node);
|
|
int64_t grouptime = group[0].nTimeConnected;
|
|
|
|
if (group.size() > nMostConnections || (group.size() == nMostConnections && grouptime > nMostConnectionsTime)) {
|
|
nMostConnections = group.size();
|
|
nMostConnectionsTime = grouptime;
|
|
naMostConnections = node.nKeyedNetGroup;
|
|
}
|
|
}
|
|
|
|
// Reduce to the network group with the most connections
|
|
vEvictionCandidates = std::move(mapNetGroupNodes[naMostConnections]);
|
|
|
|
// Disconnect from the network group with the most connections
|
|
NodeId evicted = vEvictionCandidates.front().id;
|
|
LOCK(cs_vNodes);
|
|
for (CNode* pnode : vNodes) {
|
|
if (pnode->GetId() == evicted) {
|
|
pnode->fDisconnect = true;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void CConnman::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);
|
|
|
|
NetPermissionFlags permissionFlags = NetPermissionFlags::PF_NONE;
|
|
hListenSocket.AddSocketPermissionFlags(permissionFlags);
|
|
|
|
CreateNodeFromAcceptedSocket(hSocket, permissionFlags, addr_bind, addr);
|
|
}
|
|
|
|
void CConnman::CreateNodeFromAcceptedSocket(SOCKET hSocket,
|
|
NetPermissionFlags permissionFlags,
|
|
const CAddress& addr_bind,
|
|
const CAddress& addr)
|
|
{
|
|
int nInbound = 0;
|
|
int nVerifiedInboundMasternodes = 0;
|
|
int nMaxInbound = nMaxConnections - m_max_outbound;
|
|
|
|
AddWhitelistPermissionFlags(permissionFlags, addr);
|
|
bool legacyWhitelisted = false;
|
|
if (NetPermissions::HasFlag(permissionFlags, NetPermissionFlags::PF_ISIMPLICIT)) {
|
|
NetPermissions::ClearFlag(permissionFlags, PF_ISIMPLICIT);
|
|
if (gArgs.GetBoolArg("-whitelistforcerelay", DEFAULT_WHITELISTFORCERELAY)) NetPermissions::AddFlag(permissionFlags, PF_FORCERELAY);
|
|
if (gArgs.GetBoolArg("-whitelistrelay", DEFAULT_WHITELISTRELAY)) NetPermissions::AddFlag(permissionFlags, PF_RELAY);
|
|
NetPermissions::AddFlag(permissionFlags, PF_MEMPOOL);
|
|
NetPermissions::AddFlag(permissionFlags, PF_NOBAN);
|
|
legacyWhitelisted = true;
|
|
}
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (const CNode* pnode : vNodes) {
|
|
if (pnode->fInbound) {
|
|
nInbound++;
|
|
if (!pnode->GetVerifiedProRegTxHash().IsNull()) {
|
|
nVerifiedInboundMasternodes++;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
std::string strDropped;
|
|
if (fLogIPs) {
|
|
strDropped = strprintf("connection from %s dropped", addr.ToString());
|
|
} else {
|
|
strDropped = "connection dropped";
|
|
}
|
|
|
|
if (!fNetworkActive) {
|
|
LogPrintf("%s: not accepting new connections\n", strDropped);
|
|
CloseSocket(hSocket);
|
|
return;
|
|
}
|
|
|
|
if (!IsSelectableSocket(hSocket))
|
|
{
|
|
LogPrintf("%s: non-selectable socket\n", strDropped);
|
|
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.
|
|
SetSocketNoDelay(hSocket);
|
|
|
|
// Don't accept connections from banned peers.
|
|
bool banned = m_banman->IsBanned(addr);
|
|
if (!NetPermissions::HasFlag(permissionFlags, NetPermissionFlags::PF_NOBAN) && banned)
|
|
{
|
|
LogPrint(BCLog::NET, "%s (banned)\n", strDropped);
|
|
CloseSocket(hSocket);
|
|
return;
|
|
}
|
|
|
|
// Only accept connections from discouraged peers if our inbound slots aren't (almost) full.
|
|
bool discouraged = m_banman->IsDiscouraged(addr);
|
|
if (!NetPermissions::HasFlag(permissionFlags, NetPermissionFlags::PF_NOBAN) && nInbound + 1 >= nMaxInbound && discouraged)
|
|
{
|
|
LogPrint(BCLog::NET, "connection from %s dropped (discouraged)\n", addr.ToString());
|
|
CloseSocket(hSocket);
|
|
return;
|
|
}
|
|
|
|
// Evict connections until we are below nMaxInbound. In case eviction protection resulted in nodes to not be evicted
|
|
// before, they might get evicted in batches now (after the protection timeout).
|
|
// We don't evict verified MN connections and also don't take them into account when checking limits. We can do this
|
|
// because we know that such connections are naturally limited by the total number of MNs, so this is not usable
|
|
// for attacks.
|
|
while (nInbound - nVerifiedInboundMasternodes >= nMaxInbound)
|
|
{
|
|
if (!AttemptToEvictConnection()) {
|
|
// No connection to evict, disconnect the new connection
|
|
LogPrint(BCLog::NET, "failed to find an eviction candidate - connection dropped (full)\n");
|
|
CloseSocket(hSocket);
|
|
return;
|
|
}
|
|
nInbound--;
|
|
}
|
|
|
|
// don't accept incoming connections until blockchain is synced
|
|
if(fMasternodeMode && !::masternodeSync->IsBlockchainSynced()) {
|
|
LogPrint(BCLog::NET, "AcceptConnection -- blockchain is not synced yet, skipping inbound connection attempt\n");
|
|
CloseSocket(hSocket);
|
|
return;
|
|
}
|
|
|
|
NodeId id = GetNewNodeId();
|
|
uint64_t nonce = GetDeterministicRandomizer(RANDOMIZER_ID_LOCALHOSTNONCE).Write(id).Finalize();
|
|
|
|
ServiceFlags nodeServices = nLocalServices;
|
|
if (NetPermissions::HasFlag(permissionFlags, PF_BLOOMFILTER)) {
|
|
nodeServices = static_cast<ServiceFlags>(nodeServices | NODE_BLOOM);
|
|
}
|
|
|
|
const bool inbound_onion = std::find(m_onion_binds.begin(), m_onion_binds.end(), addr_bind) != m_onion_binds.end();
|
|
CNode* pnode = new CNode(id, nodeServices, hSocket, addr, CalculateKeyedNetGroup(addr), nonce, addr_bind, "", true, inbound_onion);
|
|
pnode->AddRef();
|
|
pnode->m_permissionFlags = permissionFlags;
|
|
// If this flag is present, the user probably expect that RPC and QT report it as whitelisted (backward compatibility)
|
|
pnode->m_legacyWhitelisted = legacyWhitelisted;
|
|
pnode->m_prefer_evict = discouraged;
|
|
m_msgproc->InitializeNode(pnode);
|
|
|
|
if (fLogIPs) {
|
|
LogPrint(BCLog::NET_NETCONN, "connection from %s accepted, sock=%d, peer=%d\n", addr.ToString(), hSocket, pnode->GetId());
|
|
} else {
|
|
LogPrint(BCLog::NET_NETCONN, "connection accepted, sock=%d, peer=%d\n", hSocket, pnode->GetId());
|
|
}
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodes.push_back(pnode);
|
|
mapSocketToNode.emplace(hSocket, pnode);
|
|
RegisterEvents(pnode);
|
|
WakeSelect();
|
|
}
|
|
|
|
// We received a new connection, harvest entropy from the time (and our peer count)
|
|
RandAddEvent((uint32_t)id);
|
|
}
|
|
|
|
void CConnman::DisconnectNodes()
|
|
{
|
|
{
|
|
LOCK(cs_vNodes);
|
|
|
|
if (!fNetworkActive) {
|
|
// Disconnect any connected nodes
|
|
for (CNode* pnode : vNodes) {
|
|
if (!pnode->fDisconnect) {
|
|
LogPrint(BCLog::NET, "Network not active, dropping peer=%d\n", pnode->GetId());
|
|
pnode->fDisconnect = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Disconnect unused nodes
|
|
for (auto it = vNodes.begin(); it != vNodes.end(); )
|
|
{
|
|
CNode* pnode = *it;
|
|
if (pnode->fDisconnect)
|
|
{
|
|
// If we were the ones who initiated the disconnect, we must assume that the other side wants to see
|
|
// pending messages. If the other side initiated the disconnect (or disconnected after we've shutdown
|
|
// the socket), we can be pretty sure that they are not interested in any pending messages anymore and
|
|
// thus can immediately close the socket.
|
|
if (!pnode->fOtherSideDisconnected) {
|
|
if (pnode->nDisconnectLingerTime == 0) {
|
|
// let's not immediately close the socket but instead wait for at least 100ms so that there is a
|
|
// chance to flush all/some pending data. Otherwise the other side might not receive REJECT messages
|
|
// that were pushed right before setting fDisconnect=true
|
|
// Flushing must happen in two places to ensure data can be received by the other side:
|
|
// 1. vSendMsg must be empty and all messages sent via send(). This is ensured by SocketHandler()
|
|
// being called before DisconnectNodes and also by the linger time
|
|
// 2. Internal socket send buffers must be flushed. This is ensured solely by the linger time
|
|
pnode->nDisconnectLingerTime = GetTimeMillis() + 100;
|
|
}
|
|
if (GetTimeMillis() < pnode->nDisconnectLingerTime) {
|
|
// everything flushed to the kernel?
|
|
if (!pnode->fSocketShutdown && pnode->nSendMsgSize == 0) {
|
|
LOCK(pnode->cs_hSocket);
|
|
if (pnode->hSocket != INVALID_SOCKET) {
|
|
// Give the other side a chance to detect the disconnect as early as possible (recv() will return 0)
|
|
::shutdown(pnode->hSocket, SD_SEND);
|
|
}
|
|
pnode->fSocketShutdown = true;
|
|
}
|
|
++it;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (fLogIPs) {
|
|
LogPrintf("ThreadSocketHandler -- removing node: peer=%d addr=%s nRefCount=%d fInbound=%d m_masternode_connection=%d m_masternode_iqr_connection=%d\n",
|
|
pnode->GetId(), pnode->addr.ToString(), pnode->GetRefCount(), pnode->fInbound, pnode->m_masternode_connection, pnode->m_masternode_iqr_connection);
|
|
} else {
|
|
LogPrintf("ThreadSocketHandler -- removing node: peer=%d nRefCount=%d fInbound=%d m_masternode_connection=%d m_masternode_iqr_connection=%d\n",
|
|
pnode->GetId(), pnode->GetRefCount(), pnode->fInbound, pnode->m_masternode_connection, pnode->m_masternode_iqr_connection);
|
|
}
|
|
|
|
// remove from vNodes
|
|
it = vNodes.erase(it);
|
|
|
|
// release outbound grant (if any)
|
|
pnode->grantOutbound.Release();
|
|
|
|
// close socket and cleanup
|
|
pnode->CloseSocketDisconnect(this);
|
|
|
|
// hold in disconnected pool until all refs are released
|
|
pnode->Release();
|
|
vNodesDisconnected.push_back(pnode);
|
|
} else {
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
{
|
|
// Delete disconnected nodes
|
|
std::list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
|
|
for (auto it = vNodesDisconnected.begin(); it != vNodesDisconnected.end(); )
|
|
{
|
|
CNode* pnode = *it;
|
|
// wait until threads are done using it
|
|
bool fDelete = false;
|
|
if (pnode->GetRefCount() <= 0) {
|
|
{
|
|
TRY_LOCK(pnode->cs_inventory, lockInv);
|
|
if (lockInv) {
|
|
TRY_LOCK(pnode->cs_vSend, lockSend);
|
|
if (lockSend) {
|
|
fDelete = true;
|
|
}
|
|
}
|
|
}
|
|
if (fDelete) {
|
|
it = vNodesDisconnected.erase(it);
|
|
DeleteNode(pnode);
|
|
}
|
|
}
|
|
if (!fDelete) {
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void CConnman::NotifyNumConnectionsChanged()
|
|
{
|
|
size_t vNodesSize;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodesSize = vNodes.size();
|
|
}
|
|
|
|
// If we had zero connections before and new connections now or if we just dropped
|
|
// to zero connections reset the sync process if its outdated.
|
|
if ((vNodesSize > 0 && nPrevNodeCount == 0) || (vNodesSize == 0 && nPrevNodeCount > 0)) {
|
|
::masternodeSync->Reset();
|
|
}
|
|
|
|
if(vNodesSize != nPrevNodeCount) {
|
|
nPrevNodeCount = vNodesSize;
|
|
if(clientInterface)
|
|
clientInterface->NotifyNumConnectionsChanged(vNodesSize);
|
|
|
|
CalculateNumConnectionsChangedStats();
|
|
}
|
|
}
|
|
|
|
void CConnman::CalculateNumConnectionsChangedStats()
|
|
{
|
|
if (!gArgs.GetBoolArg("-statsenabled", DEFAULT_STATSD_ENABLE)) {
|
|
return;
|
|
}
|
|
|
|
// count various node attributes for statsD
|
|
int fullNodes = 0;
|
|
int spvNodes = 0;
|
|
int inboundNodes = 0;
|
|
int outboundNodes = 0;
|
|
int ipv4Nodes = 0;
|
|
int ipv6Nodes = 0;
|
|
int torNodes = 0;
|
|
mapMsgCmdSize mapRecvBytesMsgStats;
|
|
mapMsgCmdSize mapSentBytesMsgStats;
|
|
for (const std::string &msg : getAllNetMessageTypes()) {
|
|
mapRecvBytesMsgStats[msg] = 0;
|
|
mapSentBytesMsgStats[msg] = 0;
|
|
}
|
|
mapRecvBytesMsgStats[NET_MESSAGE_COMMAND_OTHER] = 0;
|
|
mapSentBytesMsgStats[NET_MESSAGE_COMMAND_OTHER] = 0;
|
|
auto vNodesCopy = CopyNodeVector(CConnman::FullyConnectedOnly);
|
|
for (auto pnode : vNodesCopy) {
|
|
{
|
|
LOCK(pnode->cs_vRecv);
|
|
for (const mapMsgCmdSize::value_type &i : pnode->mapRecvBytesPerMsgCmd)
|
|
mapRecvBytesMsgStats[i.first] += i.second;
|
|
}
|
|
{
|
|
LOCK(pnode->cs_vSend);
|
|
for (const mapMsgCmdSize::value_type &i : pnode->mapSendBytesPerMsgCmd)
|
|
mapSentBytesMsgStats[i.first] += i.second;
|
|
}
|
|
if(pnode->fClient)
|
|
spvNodes++;
|
|
else
|
|
fullNodes++;
|
|
if(pnode->fInbound)
|
|
inboundNodes++;
|
|
else
|
|
outboundNodes++;
|
|
if(pnode->addr.IsIPv4())
|
|
ipv4Nodes++;
|
|
if(pnode->addr.IsIPv6())
|
|
ipv6Nodes++;
|
|
if(pnode->addr.IsTor())
|
|
torNodes++;
|
|
if(pnode->nPingUsecTime > 0)
|
|
statsClient.timing("peers.ping_us", pnode->nPingUsecTime, 1.0f);
|
|
}
|
|
ReleaseNodeVector(vNodesCopy);
|
|
for (const std::string &msg : getAllNetMessageTypes()) {
|
|
statsClient.gauge("bandwidth.message." + msg + ".totalBytesReceived", mapRecvBytesMsgStats[msg], 1.0f);
|
|
statsClient.gauge("bandwidth.message." + msg + ".totalBytesSent", mapSentBytesMsgStats[msg], 1.0f);
|
|
}
|
|
statsClient.gauge("peers.totalConnections", nPrevNodeCount, 1.0f);
|
|
statsClient.gauge("peers.spvNodeConnections", spvNodes, 1.0f);
|
|
statsClient.gauge("peers.fullNodeConnections", fullNodes, 1.0f);
|
|
statsClient.gauge("peers.inboundConnections", inboundNodes, 1.0f);
|
|
statsClient.gauge("peers.outboundConnections", outboundNodes, 1.0f);
|
|
statsClient.gauge("peers.ipv4Connections", ipv4Nodes, 1.0f);
|
|
statsClient.gauge("peers.ipv6Connections", ipv6Nodes, 1.0f);
|
|
statsClient.gauge("peers.torConnections", torNodes, 1.0f);
|
|
}
|
|
|
|
void CConnman::InactivityCheck(CNode *pnode) const
|
|
{
|
|
int64_t nTime = GetSystemTimeInSeconds();
|
|
if (nTime - pnode->nTimeConnected > m_peer_connect_timeout)
|
|
{
|
|
if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
|
|
{
|
|
LogPrint(BCLog::NET, "socket no message in first %i seconds, %d %d from %d\n", m_peer_connect_timeout, pnode->nLastRecv != 0, pnode->nLastSend != 0, pnode->GetId());
|
|
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 > TIMEOUT_INTERVAL)
|
|
{
|
|
LogPrintf("socket receive timeout: %is\n", nTime - pnode->nLastRecv);
|
|
pnode->fDisconnect = true;
|
|
}
|
|
else if (pnode->nPingNonceSent && pnode->nPingUsecStart + TIMEOUT_INTERVAL * 1000000 < GetTimeMicros())
|
|
{
|
|
LogPrintf("ping timeout: %fs\n", 0.000001 * (GetTimeMicros() - pnode->nPingUsecStart));
|
|
pnode->fDisconnect = true;
|
|
}
|
|
else if (!pnode->fSuccessfullyConnected)
|
|
{
|
|
LogPrint(BCLog::NET, "version handshake timeout from %d\n", pnode->GetId());
|
|
pnode->fDisconnect = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool CConnman::GenerateSelectSet(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set)
|
|
{
|
|
for (const ListenSocket& hListenSocket : vhListenSocket) {
|
|
recv_set.insert(hListenSocket.socket);
|
|
}
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (CNode* pnode : vNodes)
|
|
{
|
|
bool select_recv = !pnode->fHasRecvData;
|
|
bool select_send = !pnode->fCanSendData;
|
|
|
|
LOCK(pnode->cs_hSocket);
|
|
if (pnode->hSocket == INVALID_SOCKET)
|
|
continue;
|
|
|
|
error_set.insert(pnode->hSocket);
|
|
if (select_send) {
|
|
send_set.insert(pnode->hSocket);
|
|
}
|
|
if (select_recv) {
|
|
recv_set.insert(pnode->hSocket);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef USE_WAKEUP_PIPE
|
|
// We add a pipe to the read set so that the select() call can be woken up from the outside
|
|
// This is done when data is added to send buffers (vSendMsg) or when new peers are added
|
|
// This is currently only implemented for POSIX compliant systems. This means that Windows will fall back to
|
|
// timing out after 50ms and then trying to send. This is ok as we assume that heavy-load daemons are usually
|
|
// run on Linux and friends.
|
|
recv_set.insert(wakeupPipe[0]);
|
|
#endif
|
|
|
|
return !recv_set.empty() || !send_set.empty() || !error_set.empty();
|
|
}
|
|
|
|
#ifdef USE_KQUEUE
|
|
void CConnman::SocketEventsKqueue(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set, bool fOnlyPoll)
|
|
{
|
|
const size_t maxEvents = 64;
|
|
struct kevent events[maxEvents];
|
|
|
|
struct timespec timeout;
|
|
timeout.tv_sec = fOnlyPoll ? 0 : SELECT_TIMEOUT_MILLISECONDS / 1000;
|
|
timeout.tv_nsec = (fOnlyPoll ? 0 : SELECT_TIMEOUT_MILLISECONDS % 1000) * 1000 * 1000;
|
|
|
|
wakeupSelectNeeded = true;
|
|
int n = kevent(kqueuefd, nullptr, 0, events, maxEvents, &timeout);
|
|
wakeupSelectNeeded = false;
|
|
if (n == -1) {
|
|
LogPrintf("kevent wait error\n");
|
|
} else if (n > 0) {
|
|
for (int i = 0; i < n; i++) {
|
|
auto& event = events[i];
|
|
if ((event.flags & EV_ERROR) || (event.flags & EV_EOF)) {
|
|
error_set.insert((SOCKET)event.ident);
|
|
continue;
|
|
}
|
|
|
|
if (event.filter == EVFILT_READ) {
|
|
recv_set.insert((SOCKET)event.ident);
|
|
}
|
|
|
|
if (event.filter == EVFILT_WRITE) {
|
|
send_set.insert((SOCKET)event.ident);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_EPOLL
|
|
void CConnman::SocketEventsEpoll(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set, bool fOnlyPoll)
|
|
{
|
|
const size_t maxEvents = 64;
|
|
epoll_event events[maxEvents];
|
|
|
|
wakeupSelectNeeded = true;
|
|
int n = epoll_wait(epollfd, events, maxEvents, fOnlyPoll ? 0 : SELECT_TIMEOUT_MILLISECONDS);
|
|
wakeupSelectNeeded = false;
|
|
for (int i = 0; i < n; i++) {
|
|
auto& e = events[i];
|
|
if((e.events & EPOLLERR) || (e.events & EPOLLHUP)) {
|
|
error_set.insert((SOCKET)e.data.fd);
|
|
continue;
|
|
}
|
|
|
|
if (e.events & EPOLLIN) {
|
|
recv_set.insert((SOCKET)e.data.fd);
|
|
}
|
|
|
|
if (e.events & EPOLLOUT) {
|
|
send_set.insert((SOCKET)e.data.fd);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_POLL
|
|
void CConnman::SocketEventsPoll(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set, bool fOnlyPoll)
|
|
{
|
|
std::set<SOCKET> recv_select_set, send_select_set, error_select_set;
|
|
if (!GenerateSelectSet(recv_select_set, send_select_set, error_select_set)) {
|
|
if (!fOnlyPoll) interruptNet.sleep_for(std::chrono::milliseconds(SELECT_TIMEOUT_MILLISECONDS));
|
|
return;
|
|
}
|
|
|
|
std::unordered_map<SOCKET, struct pollfd> pollfds;
|
|
for (SOCKET socket_id : recv_select_set) {
|
|
pollfds[socket_id].fd = socket_id;
|
|
pollfds[socket_id].events |= POLLIN;
|
|
}
|
|
|
|
for (SOCKET socket_id : send_select_set) {
|
|
pollfds[socket_id].fd = socket_id;
|
|
pollfds[socket_id].events |= POLLOUT;
|
|
}
|
|
|
|
for (SOCKET socket_id : error_select_set) {
|
|
pollfds[socket_id].fd = socket_id;
|
|
// These flags are ignored, but we set them for clarity
|
|
pollfds[socket_id].events |= POLLERR|POLLHUP;
|
|
}
|
|
|
|
std::vector<struct pollfd> vpollfds;
|
|
vpollfds.reserve(pollfds.size());
|
|
for (auto it : pollfds) {
|
|
vpollfds.push_back(std::move(it.second));
|
|
}
|
|
|
|
wakeupSelectNeeded = true;
|
|
int r = poll(vpollfds.data(), vpollfds.size(), fOnlyPoll ? 0 : SELECT_TIMEOUT_MILLISECONDS);
|
|
wakeupSelectNeeded = false;
|
|
if (r < 0) {
|
|
return;
|
|
}
|
|
|
|
if (interruptNet) return;
|
|
|
|
for (struct pollfd pollfd_entry : vpollfds) {
|
|
if (pollfd_entry.revents & POLLIN) recv_set.insert(pollfd_entry.fd);
|
|
if (pollfd_entry.revents & POLLOUT) send_set.insert(pollfd_entry.fd);
|
|
if (pollfd_entry.revents & (POLLERR|POLLHUP)) error_set.insert(pollfd_entry.fd);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void CConnman::SocketEventsSelect(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set, bool fOnlyPoll)
|
|
{
|
|
std::set<SOCKET> recv_select_set, send_select_set, error_select_set;
|
|
if (!GenerateSelectSet(recv_select_set, send_select_set, error_select_set)) {
|
|
interruptNet.sleep_for(std::chrono::milliseconds(SELECT_TIMEOUT_MILLISECONDS));
|
|
return;
|
|
}
|
|
|
|
//
|
|
// Find which sockets have data to receive
|
|
//
|
|
struct timeval timeout;
|
|
timeout.tv_sec = 0;
|
|
timeout.tv_usec = fOnlyPoll ? 0 : SELECT_TIMEOUT_MILLISECONDS * 1000; // 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;
|
|
|
|
for (SOCKET hSocket : recv_select_set) {
|
|
FD_SET(hSocket, &fdsetRecv);
|
|
hSocketMax = std::max(hSocketMax, hSocket);
|
|
}
|
|
|
|
for (SOCKET hSocket : send_select_set) {
|
|
FD_SET(hSocket, &fdsetSend);
|
|
hSocketMax = std::max(hSocketMax, hSocket);
|
|
}
|
|
|
|
for (SOCKET hSocket : error_select_set) {
|
|
FD_SET(hSocket, &fdsetError);
|
|
hSocketMax = std::max(hSocketMax, hSocket);
|
|
}
|
|
|
|
wakeupSelectNeeded = true;
|
|
int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout);
|
|
wakeupSelectNeeded = false;
|
|
if (interruptNet)
|
|
return;
|
|
|
|
if (nSelect == SOCKET_ERROR)
|
|
{
|
|
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);
|
|
if (!interruptNet.sleep_for(std::chrono::milliseconds(SELECT_TIMEOUT_MILLISECONDS)))
|
|
return;
|
|
}
|
|
|
|
for (SOCKET hSocket : recv_select_set) {
|
|
if (FD_ISSET(hSocket, &fdsetRecv)) {
|
|
recv_set.insert(hSocket);
|
|
}
|
|
}
|
|
|
|
for (SOCKET hSocket : send_select_set) {
|
|
if (FD_ISSET(hSocket, &fdsetSend)) {
|
|
send_set.insert(hSocket);
|
|
}
|
|
}
|
|
|
|
for (SOCKET hSocket : error_select_set) {
|
|
if (FD_ISSET(hSocket, &fdsetError)) {
|
|
error_set.insert(hSocket);
|
|
}
|
|
}
|
|
}
|
|
|
|
void CConnman::SocketEvents(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set, bool fOnlyPoll)
|
|
{
|
|
switch (socketEventsMode) {
|
|
#ifdef USE_KQUEUE
|
|
case SOCKETEVENTS_KQUEUE:
|
|
SocketEventsKqueue(recv_set, send_set, error_set, fOnlyPoll);
|
|
break;
|
|
#endif
|
|
#ifdef USE_EPOLL
|
|
case SOCKETEVENTS_EPOLL:
|
|
SocketEventsEpoll(recv_set, send_set, error_set, fOnlyPoll);
|
|
break;
|
|
#endif
|
|
#ifdef USE_POLL
|
|
case SOCKETEVENTS_POLL:
|
|
SocketEventsPoll(recv_set, send_set, error_set, fOnlyPoll);
|
|
break;
|
|
#endif
|
|
case SOCKETEVENTS_SELECT:
|
|
SocketEventsSelect(recv_set, send_set, error_set, fOnlyPoll);
|
|
break;
|
|
default:
|
|
assert(false);
|
|
}
|
|
}
|
|
|
|
void CConnman::SocketHandler()
|
|
{
|
|
bool fOnlyPoll = false;
|
|
{
|
|
// check if we have work to do and thus should avoid waiting for events
|
|
LOCK2(cs_vNodes, cs_mapNodesWithDataToSend);
|
|
if (!mapReceivableNodes.empty()) {
|
|
fOnlyPoll = true;
|
|
} else if (!mapSendableNodes.empty() && !mapNodesWithDataToSend.empty()) {
|
|
// we must check if at least one of the nodes with pending messages is also sendable, as otherwise a single
|
|
// node would be able to make the network thread busy with polling
|
|
for (auto& p : mapNodesWithDataToSend) {
|
|
if (mapSendableNodes.count(p.first)) {
|
|
fOnlyPoll = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
std::set<SOCKET> recv_set, send_set, error_set;
|
|
SocketEvents(recv_set, send_set, error_set, fOnlyPoll);
|
|
|
|
#ifdef USE_WAKEUP_PIPE
|
|
// drain the wakeup pipe
|
|
if (recv_set.count(wakeupPipe[0])) {
|
|
char buf[128];
|
|
while (true) {
|
|
int r = read(wakeupPipe[0], buf, sizeof(buf));
|
|
if (r <= 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (interruptNet) return;
|
|
|
|
//
|
|
// Accept new connections
|
|
//
|
|
for (const ListenSocket& hListenSocket : vhListenSocket)
|
|
{
|
|
if (recv_set.count(hListenSocket.socket) > 0)
|
|
{
|
|
AcceptConnection(hListenSocket);
|
|
}
|
|
}
|
|
|
|
std::vector<CNode*> vErrorNodes;
|
|
std::vector<CNode*> vReceivableNodes;
|
|
std::vector<CNode*> vSendableNodes;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (auto hSocket : error_set) {
|
|
auto it = mapSocketToNode.find(hSocket);
|
|
if (it == mapSocketToNode.end()) {
|
|
continue;
|
|
}
|
|
it->second->AddRef();
|
|
vErrorNodes.emplace_back(it->second);
|
|
}
|
|
for (auto hSocket : recv_set) {
|
|
if (error_set.count(hSocket)) {
|
|
// no need to handle it twice
|
|
continue;
|
|
}
|
|
|
|
auto it = mapSocketToNode.find(hSocket);
|
|
if (it == mapSocketToNode.end()) {
|
|
continue;
|
|
}
|
|
|
|
auto jt = mapReceivableNodes.emplace(it->second->GetId(), it->second);
|
|
assert(jt.first->second == it->second);
|
|
it->second->fHasRecvData = true;
|
|
}
|
|
for (auto hSocket : send_set) {
|
|
auto it = mapSocketToNode.find(hSocket);
|
|
if (it == mapSocketToNode.end()) {
|
|
continue;
|
|
}
|
|
|
|
auto jt = mapSendableNodes.emplace(it->second->GetId(), it->second);
|
|
assert(jt.first->second == it->second);
|
|
it->second->fCanSendData = true;
|
|
}
|
|
|
|
// collect nodes that have a receivable socket
|
|
// also clean up mapReceivableNodes from nodes that were receivable in the last iteration but aren't anymore
|
|
vReceivableNodes.reserve(mapReceivableNodes.size());
|
|
for (auto it = mapReceivableNodes.begin(); it != mapReceivableNodes.end(); ) {
|
|
if (!it->second->fHasRecvData) {
|
|
it = mapReceivableNodes.erase(it);
|
|
} else {
|
|
// Implement the following logic:
|
|
// * If there is data to send, try sending data. As this only
|
|
// happens when optimistic write failed, we choose to first drain the
|
|
// write buffer in this case before receiving more. This avoids
|
|
// needlessly queueing received data, if the remote peer is not themselves
|
|
// receiving data. This means properly utilizing TCP flow control signalling.
|
|
// * Otherwise, if there is space left in the receive buffer (!fPauseRecv), try
|
|
// receiving data (which should succeed as the socket signalled as receivable).
|
|
if (!it->second->fPauseRecv && it->second->nSendMsgSize == 0 && !it->second->fDisconnect) {
|
|
it->second->AddRef();
|
|
vReceivableNodes.emplace_back(it->second);
|
|
}
|
|
++it;
|
|
}
|
|
}
|
|
|
|
// collect nodes that have data to send and have a socket with non-empty write buffers
|
|
// also clean up mapNodesWithDataToSend from nodes that had messages to send in the last iteration
|
|
// but don't have any in this iteration
|
|
LOCK(cs_mapNodesWithDataToSend);
|
|
vSendableNodes.reserve(mapNodesWithDataToSend.size());
|
|
for (auto it = mapNodesWithDataToSend.begin(); it != mapNodesWithDataToSend.end(); ) {
|
|
if (it->second->nSendMsgSize == 0) {
|
|
// See comment in PushMessage
|
|
it->second->Release();
|
|
it = mapNodesWithDataToSend.erase(it);
|
|
} else {
|
|
if (it->second->fCanSendData) {
|
|
it->second->AddRef();
|
|
vSendableNodes.emplace_back(it->second);
|
|
}
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (CNode* pnode : vErrorNodes)
|
|
{
|
|
if (interruptNet) {
|
|
break;
|
|
}
|
|
// let recv() return errors and then handle it
|
|
SocketRecvData(pnode);
|
|
}
|
|
|
|
for (CNode* pnode : vReceivableNodes)
|
|
{
|
|
if (interruptNet) {
|
|
break;
|
|
}
|
|
if (pnode->fPauseRecv) {
|
|
continue;
|
|
}
|
|
|
|
SocketRecvData(pnode);
|
|
}
|
|
|
|
for (CNode* pnode : vSendableNodes) {
|
|
if (interruptNet) {
|
|
break;
|
|
}
|
|
|
|
// Send data
|
|
size_t bytes_sent = WITH_LOCK(pnode->cs_vSend, return SocketSendData(pnode));
|
|
if (bytes_sent) RecordBytesSent(bytes_sent);
|
|
}
|
|
|
|
ReleaseNodeVector(vErrorNodes);
|
|
ReleaseNodeVector(vReceivableNodes);
|
|
ReleaseNodeVector(vSendableNodes);
|
|
|
|
if (interruptNet) {
|
|
return;
|
|
}
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
// remove nodes from mapSendableNodes, so that the next iteration knows that there is no work to do
|
|
// (even if there are pending messages to be sent)
|
|
for (auto it = mapSendableNodes.begin(); it != mapSendableNodes.end(); ) {
|
|
if (!it->second->fCanSendData) {
|
|
LogPrint(BCLog::NET, "%s -- remove mapSendableNodes, peer=%d\n", __func__, it->second->GetId());
|
|
it = mapSendableNodes.erase(it);
|
|
} else {
|
|
++it;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
size_t CConnman::SocketRecvData(CNode *pnode)
|
|
{
|
|
// typical socket buffer is 8K-64K
|
|
uint8_t pchBuf[0x10000];
|
|
int nBytes = 0;
|
|
{
|
|
LOCK(pnode->cs_hSocket);
|
|
if (pnode->hSocket == INVALID_SOCKET)
|
|
return 0;
|
|
nBytes = recv(pnode->hSocket, (char*)pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
|
|
if (nBytes < (int)sizeof(pchBuf)) {
|
|
pnode->fHasRecvData = false;
|
|
}
|
|
}
|
|
if (nBytes > 0)
|
|
{
|
|
bool notify = false;
|
|
if (!pnode->ReceiveMsgBytes(Span<const uint8_t>(pchBuf, nBytes), notify)) {
|
|
LOCK(cs_vNodes);
|
|
pnode->CloseSocketDisconnect(this);
|
|
}
|
|
RecordBytesRecv(nBytes);
|
|
if (notify) {
|
|
size_t nSizeAdded = 0;
|
|
auto it(pnode->vRecvMsg.begin());
|
|
for (; it != pnode->vRecvMsg.end(); ++it) {
|
|
// vRecvMsg contains only completed CNetMessage
|
|
// the single possible partially deserialized message are held by TransportDeserializer
|
|
nSizeAdded += it->m_raw_message_size;
|
|
}
|
|
{
|
|
LOCK(pnode->cs_vProcessMsg);
|
|
pnode->vProcessMsg.splice(pnode->vProcessMsg.end(), pnode->vRecvMsg, pnode->vRecvMsg.begin(), it);
|
|
pnode->nProcessQueueSize += nSizeAdded;
|
|
pnode->fPauseRecv = pnode->nProcessQueueSize > nReceiveFloodSize;
|
|
}
|
|
WakeMessageHandler();
|
|
}
|
|
}
|
|
else if (nBytes == 0)
|
|
{
|
|
// socket closed gracefully
|
|
if (!pnode->fDisconnect) {
|
|
LogPrint(BCLog::NET, "socket closed for peer=%d\n", pnode->GetId());
|
|
}
|
|
LOCK(cs_vNodes);
|
|
pnode->fOtherSideDisconnected = true; // avoid lingering
|
|
pnode->CloseSocketDisconnect(this);
|
|
}
|
|
else if (nBytes < 0)
|
|
{
|
|
// error
|
|
int nErr = WSAGetLastError();
|
|
if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
|
|
{
|
|
if (!pnode->fDisconnect){
|
|
LogPrint(BCLog::NET, "socket recv error for peer=%d: %s\n", pnode->GetId(), NetworkErrorString(nErr));
|
|
}
|
|
LOCK(cs_vNodes);
|
|
pnode->fOtherSideDisconnected = true; // avoid lingering
|
|
pnode->CloseSocketDisconnect(this);
|
|
}
|
|
}
|
|
if (nBytes < 0) {
|
|
return 0;
|
|
}
|
|
return (size_t)nBytes;
|
|
}
|
|
|
|
void CConnman::ThreadSocketHandler()
|
|
{
|
|
int64_t nLastCleanupNodes = 0;
|
|
|
|
while (!interruptNet)
|
|
{
|
|
// Handle sockets before we do the next round of disconnects. This allows us to flush send buffers one last time
|
|
// before actually closing sockets. Receiving is however skipped in case a peer is pending to be disconnected
|
|
SocketHandler();
|
|
if (GetTimeMillis() - nLastCleanupNodes > 1000) {
|
|
ForEachNode(AllNodes, [&](CNode* pnode) {
|
|
InactivityCheck(pnode);
|
|
});
|
|
nLastCleanupNodes = GetTimeMillis();
|
|
}
|
|
DisconnectNodes();
|
|
NotifyNumConnectionsChanged();
|
|
}
|
|
}
|
|
|
|
void CConnman::WakeMessageHandler()
|
|
{
|
|
{
|
|
LOCK(mutexMsgProc);
|
|
fMsgProcWake = true;
|
|
}
|
|
condMsgProc.notify_one();
|
|
}
|
|
|
|
void CConnman::WakeSelect()
|
|
{
|
|
#ifdef USE_WAKEUP_PIPE
|
|
if (wakeupPipe[1] == -1) {
|
|
return;
|
|
}
|
|
|
|
char buf{0};
|
|
if (write(wakeupPipe[1], &buf, sizeof(buf)) != 1) {
|
|
LogPrint(BCLog::NET, "write to wakeupPipe failed\n");
|
|
}
|
|
#endif
|
|
|
|
wakeupSelectNeeded = false;
|
|
}
|
|
|
|
void CConnman::ThreadDNSAddressSeed()
|
|
{
|
|
FastRandomContext rng;
|
|
std::vector<std::string> seeds = Params().DNSSeeds();
|
|
Shuffle(seeds.begin(), seeds.end(), rng);
|
|
int seeds_right_now = 0; // Number of seeds left before testing if we have enough connections
|
|
int found = 0;
|
|
|
|
if (gArgs.GetBoolArg("-forcednsseed", DEFAULT_FORCEDNSSEED)) {
|
|
// When -forcednsseed is provided, query all.
|
|
seeds_right_now = seeds.size();
|
|
} else if (addrman.size() == 0) {
|
|
// If we have no known peers, query all.
|
|
// This will occur on the first run, or if peers.dat has been
|
|
// deleted.
|
|
seeds_right_now = seeds.size();
|
|
}
|
|
|
|
// goal: only query DNS seed if address need is acute
|
|
// * If we have a reasonable number of peers in addrman, spend
|
|
// some time trying them first. This improves user privacy by
|
|
// creating fewer identifying DNS requests, reduces trust by
|
|
// giving seeds less influence on the network topology, and
|
|
// reduces traffic to the seeds.
|
|
// * When querying DNS seeds query a few at once, this ensures
|
|
// that we don't give DNS seeds the ability to eclipse nodes
|
|
// that query them.
|
|
// * If we continue having problems, eventually query all the
|
|
// DNS seeds, and if that fails too, also try the fixed seeds.
|
|
// (done in ThreadOpenConnections)
|
|
const std::chrono::seconds seeds_wait_time = (addrman.size() >= DNSSEEDS_DELAY_PEER_THRESHOLD ? DNSSEEDS_DELAY_MANY_PEERS : DNSSEEDS_DELAY_FEW_PEERS);
|
|
|
|
for (const std::string& seed : seeds) {
|
|
if (seeds_right_now == 0) {
|
|
seeds_right_now += DNSSEEDS_TO_QUERY_AT_ONCE;
|
|
|
|
if (addrman.size() > 0) {
|
|
LogPrintf("Waiting %d seconds before querying DNS seeds.\n", seeds_wait_time.count());
|
|
std::chrono::seconds to_wait = seeds_wait_time;
|
|
while (to_wait.count() > 0) {
|
|
// if sleeping for the MANY_PEERS interval, wake up
|
|
// early to see if we have enough peers and can stop
|
|
// this thread entirely freeing up its resources
|
|
std::chrono::seconds w = std::min(DNSSEEDS_DELAY_FEW_PEERS, to_wait);
|
|
if (!interruptNet.sleep_for(w)) return;
|
|
to_wait -= w;
|
|
|
|
int nRelevant = 0;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (const CNode* pnode : vNodes) {
|
|
nRelevant += pnode->fSuccessfullyConnected && !pnode->fFeeler && !pnode->fOneShot && !pnode->m_manual_connection && !pnode->fInbound && !pnode->m_masternode_probe_connection;
|
|
}
|
|
}
|
|
if (nRelevant >= 2) {
|
|
if (found > 0) {
|
|
LogPrintf("%d addresses found from DNS seeds\n", found);
|
|
LogPrintf("P2P peers available. Finished DNS seeding.\n");
|
|
} else {
|
|
LogPrintf("P2P peers available. Skipped DNS seeding.\n");
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (interruptNet) return;
|
|
|
|
// hold off on querying seeds if P2P network deactivated
|
|
if (!fNetworkActive) {
|
|
LogPrintf("Waiting for network to be reactivated before querying DNS seeds.\n");
|
|
do {
|
|
if (!interruptNet.sleep_for(std::chrono::seconds{1})) return;
|
|
} while (!fNetworkActive);
|
|
}
|
|
|
|
LogPrintf("Loading addresses from DNS seed %s\n", seed);
|
|
if (HaveNameProxy()) {
|
|
AddOneShot(seed);
|
|
} else {
|
|
std::vector<CNetAddr> vIPs;
|
|
std::vector<CAddress> vAdd;
|
|
ServiceFlags requiredServiceBits = GetDesirableServiceFlags(NODE_NONE);
|
|
std::string host = strprintf("x%x.%s", requiredServiceBits, seed);
|
|
CNetAddr resolveSource;
|
|
if (!resolveSource.SetInternal(host)) {
|
|
continue;
|
|
}
|
|
unsigned int nMaxIPs = 256; // Limits number of IPs learned from a DNS seed
|
|
if (LookupHost(host, vIPs, nMaxIPs, true)) {
|
|
for (const CNetAddr& ip : vIPs) {
|
|
int nOneDay = 24*3600;
|
|
CAddress addr = CAddress(CService(ip, Params().GetDefaultPort()), requiredServiceBits);
|
|
addr.nTime = GetTime() - 3*nOneDay - rng.randrange(4*nOneDay); // use a random age between 3 and 7 days old
|
|
vAdd.push_back(addr);
|
|
found++;
|
|
}
|
|
addrman.Add(vAdd, resolveSource);
|
|
} else {
|
|
// We now avoid directly using results from DNS Seeds which do not support service bit filtering,
|
|
// instead using them as a oneshot to get nodes with our desired service bits.
|
|
AddOneShot(seed);
|
|
}
|
|
}
|
|
--seeds_right_now;
|
|
}
|
|
LogPrintf("%d addresses found from DNS seeds\n", found);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void CConnman::DumpAddresses()
|
|
{
|
|
int64_t nStart = GetTimeMillis();
|
|
|
|
CAddrDB adb;
|
|
adb.Write(addrman);
|
|
|
|
LogPrint(BCLog::NET, "Flushed %d addresses to peers.dat %dms\n",
|
|
addrman.size(), GetTimeMillis() - nStart);
|
|
}
|
|
|
|
void CConnman::ProcessOneShot()
|
|
{
|
|
std::string strDest;
|
|
{
|
|
LOCK(cs_vOneShots);
|
|
if (vOneShots.empty())
|
|
return;
|
|
strDest = vOneShots.front();
|
|
vOneShots.pop_front();
|
|
}
|
|
CAddress addr;
|
|
CSemaphoreGrant grant(*semOutbound, true);
|
|
if (grant) {
|
|
OpenNetworkConnection(addr, false, &grant, strDest.c_str(), true);
|
|
}
|
|
}
|
|
|
|
bool CConnman::GetTryNewOutboundPeer()
|
|
{
|
|
return m_try_another_outbound_peer;
|
|
}
|
|
|
|
void CConnman::SetTryNewOutboundPeer(bool flag)
|
|
{
|
|
m_try_another_outbound_peer = flag;
|
|
LogPrint(BCLog::NET, "net: setting try another outbound peer=%s\n", flag ? "true" : "false");
|
|
}
|
|
|
|
// Return the number of peers we have over our outbound connection limit
|
|
// Exclude peers that are marked for disconnect, or are going to be
|
|
// disconnected soon (eg one-shots and feelers)
|
|
// Also exclude peers that haven't finished initial connection handshake yet
|
|
// (so that we don't decide we're over our desired connection limit, and then
|
|
// evict some peer that has finished the handshake)
|
|
int CConnman::GetExtraOutboundCount()
|
|
{
|
|
int nOutbound = 0;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (const CNode* pnode : vNodes) {
|
|
// don't count outbound masternodes
|
|
if (pnode->m_masternode_connection) {
|
|
continue;
|
|
}
|
|
if (!pnode->fInbound && !pnode->m_manual_connection && !pnode->fFeeler && !pnode->fDisconnect && !pnode->fOneShot && pnode->fSuccessfullyConnected && !pnode->m_masternode_probe_connection) {
|
|
++nOutbound;
|
|
}
|
|
}
|
|
}
|
|
return std::max(nOutbound - m_max_outbound_full_relay - m_max_outbound_block_relay, 0);
|
|
}
|
|
|
|
void CConnman::ThreadOpenConnections(const std::vector<std::string> connect)
|
|
{
|
|
// Connect to specific addresses
|
|
if (!connect.empty())
|
|
{
|
|
for (int64_t nLoop = 0;; nLoop++)
|
|
{
|
|
ProcessOneShot();
|
|
for (const std::string& strAddr : connect)
|
|
{
|
|
CAddress addr(CService(), NODE_NONE);
|
|
OpenNetworkConnection(addr, false, nullptr, strAddr.c_str(), false, false, true);
|
|
for (int i = 0; i < 10 && i < nLoop; i++)
|
|
{
|
|
if (!interruptNet.sleep_for(std::chrono::milliseconds(500)))
|
|
return;
|
|
}
|
|
}
|
|
if (!interruptNet.sleep_for(std::chrono::milliseconds(500)))
|
|
return;
|
|
}
|
|
}
|
|
|
|
// 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 (!interruptNet)
|
|
{
|
|
ProcessOneShot();
|
|
|
|
if (!interruptNet.sleep_for(std::chrono::milliseconds(500)))
|
|
return;
|
|
|
|
CSemaphoreGrant grant(*semOutbound);
|
|
if (interruptNet)
|
|
return;
|
|
|
|
// Add seed nodes if DNS seeds are all down (an infrastructure attack?).
|
|
// Note that we only do this if we started with an empty peers.dat,
|
|
// (in which case we will query DNS seeds immediately) *and* the DNS
|
|
// seeds have not returned any results.
|
|
if (addrman.size() == 0 && (GetTime() - nStart > 60)) {
|
|
static bool done = false;
|
|
if (!done) {
|
|
LogPrintf("Adding fixed seed nodes as DNS doesn't seem to be available.\n");
|
|
CNetAddr local;
|
|
local.SetInternal("fixedseeds");
|
|
addrman.Add(convertSeed6(Params().FixedSeeds()), local);
|
|
done = true;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Choose an address to connect to based on most recently seen
|
|
//
|
|
CAddress addrConnect;
|
|
|
|
// Only connect out to one peer per network group (/16 for IPv4).
|
|
// This is only done for mainnet and testnet
|
|
int nOutboundFullRelay = 0;
|
|
int nOutboundBlockRelay = 0;
|
|
std::set<std::vector<unsigned char> > setConnected;
|
|
if (!Params().AllowMultipleAddressesFromGroup()) {
|
|
LOCK(cs_vNodes);
|
|
for (const CNode* pnode : vNodes) {
|
|
if (!pnode->fInbound && !pnode->m_masternode_connection && !pnode->m_manual_connection) {
|
|
// Netgroups for inbound and addnode peers are not excluded because our goal here
|
|
// is to not use multiple of our limited outbound slots on a single netgroup
|
|
// but inbound and addnode peers do not use our outbound slots. Inbound peers
|
|
// also have the added issue that they're attacker controlled and could be used
|
|
// to prevent us from connecting to particular hosts if we used them here.
|
|
setConnected.insert(pnode->addr.GetGroup(addrman.m_asmap));
|
|
if (!pnode->IsAddrRelayPeer()) {
|
|
nOutboundBlockRelay++;
|
|
} else if (!pnode->fFeeler) {
|
|
nOutboundFullRelay++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
std::set<uint256> setConnectedMasternodes;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (CNode* pnode : vNodes) {
|
|
auto verifiedProRegTxHash = pnode->GetVerifiedProRegTxHash();
|
|
if (!verifiedProRegTxHash.IsNull()) {
|
|
setConnectedMasternodes.emplace(verifiedProRegTxHash);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Feeler Connections
|
|
//
|
|
// 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.
|
|
// * Only make a feeler connection once every few minutes.
|
|
//
|
|
bool fFeeler = false;
|
|
|
|
if (nOutboundFullRelay >= m_max_outbound_full_relay && nOutboundBlockRelay >= m_max_outbound_block_relay && !GetTryNewOutboundPeer()) {
|
|
int64_t nTime = GetTimeMicros(); // The current time right now (in microseconds).
|
|
if (nTime > nNextFeeler) {
|
|
nNextFeeler = PoissonNextSend(nTime, FEELER_INTERVAL);
|
|
fFeeler = true;
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
addrman.ResolveCollisions();
|
|
|
|
auto mnList = deterministicMNManager->GetListAtChainTip();
|
|
|
|
int64_t nANow = GetAdjustedTime();
|
|
int nTries = 0;
|
|
while (!interruptNet)
|
|
{
|
|
CAddrInfo addr = addrman.SelectTriedCollision();
|
|
|
|
// SelectTriedCollision returns an invalid address if it is empty.
|
|
if (!fFeeler || !addr.IsValid()) {
|
|
addr = addrman.Select(fFeeler);
|
|
}
|
|
|
|
auto dmn = mnList.GetMNByService(addr);
|
|
bool isMasternode = dmn != nullptr;
|
|
|
|
// Require outbound connections, other than feelers, to be to distinct network groups
|
|
if (!fFeeler && setConnected.count(addr.GetGroup(addrman.m_asmap))) {
|
|
break;
|
|
}
|
|
|
|
// if we selected an invalid address, restart
|
|
if (!addr.IsValid() || setConnected.count(addr.GetGroup(addrman.m_asmap)))
|
|
break;
|
|
|
|
// don't try to connect to masternodes that we already have a connection to (most likely inbound)
|
|
if (isMasternode && setConnectedMasternodes.count(dmn->proTxHash))
|
|
break;
|
|
|
|
// if we selected a local address, restart (local addresses are allowed in regtest and devnet)
|
|
bool fAllowLocal = Params().AllowMultiplePorts() && addrConnect.GetPort() != GetListenPort();
|
|
if (!fAllowLocal && IsLocal(addrConnect)) {
|
|
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 (nANow - addr.nLastTry < 600 && nTries < 30)
|
|
continue;
|
|
|
|
// for non-feelers, require all the services we'll want,
|
|
// for feelers, only require they be a full node (only because most
|
|
// SPV clients don't have a good address DB available)
|
|
if (!isMasternode && !fFeeler && !HasAllDesirableServiceFlags(addr.nServices)) {
|
|
continue;
|
|
} else if (!isMasternode && fFeeler && !MayHaveUsefulAddressDB(addr.nServices)) {
|
|
continue;
|
|
}
|
|
|
|
// Do not allow non-default ports, unless after 50 invalid
|
|
// addresses selected already. This is to prevent malicious peers
|
|
// from advertising themselves as a service on another host and
|
|
// port, causing a DoS attack as nodes around the network attempt
|
|
// to connect to it fruitlessly.
|
|
if ((!isMasternode || !Params().AllowMultiplePorts()) && addr.GetPort() != Params().GetDefaultPort(addr.GetNetwork()) && addr.GetPort() != GetListenPort() && 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);
|
|
if (!interruptNet.sleep_for(std::chrono::milliseconds(randsleep)))
|
|
return;
|
|
if (fLogIPs) {
|
|
LogPrint(BCLog::NET, "Making feeler connection to %s\n", addrConnect.ToString());
|
|
} else {
|
|
LogPrint(BCLog::NET, "Making feeler connection\n");
|
|
}
|
|
}
|
|
|
|
// Open this connection as block-relay-only if we're already at our
|
|
// full-relay capacity, but not yet at our block-relay peer limit.
|
|
// (It should not be possible for fFeeler to be set if we're not
|
|
// also at our block-relay peer limit, but check against that as
|
|
// well for sanity.)
|
|
bool block_relay_only = nOutboundBlockRelay < m_max_outbound_block_relay && !fFeeler && nOutboundFullRelay >= m_max_outbound_full_relay;
|
|
|
|
OpenNetworkConnection(addrConnect, (int)setConnected.size() >= std::min(nMaxConnections - 1, 2), &grant, nullptr, false, fFeeler, false, block_relay_only);
|
|
}
|
|
}
|
|
}
|
|
|
|
std::vector<AddedNodeInfo> CConnman::GetAddedNodeInfo()
|
|
{
|
|
std::vector<AddedNodeInfo> ret;
|
|
|
|
std::list<std::string> lAddresses(0);
|
|
{
|
|
LOCK(cs_vAddedNodes);
|
|
ret.reserve(vAddedNodes.size());
|
|
std::copy(vAddedNodes.cbegin(), vAddedNodes.cend(), std::back_inserter(lAddresses));
|
|
}
|
|
|
|
|
|
// Build a map of all already connected addresses (by IP:port and by name) to inbound/outbound and resolved CService
|
|
std::map<CService, bool> mapConnected;
|
|
std::map<std::string, std::pair<bool, CService>> mapConnectedByName;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (const CNode* pnode : vNodes) {
|
|
if (pnode->addr.IsValid()) {
|
|
mapConnected[pnode->addr] = pnode->fInbound;
|
|
}
|
|
std::string addrName = pnode->GetAddrName();
|
|
if (!addrName.empty()) {
|
|
mapConnectedByName[std::move(addrName)] = std::make_pair(pnode->fInbound, static_cast<const CService&>(pnode->addr));
|
|
}
|
|
}
|
|
}
|
|
|
|
for (const std::string& strAddNode : lAddresses) {
|
|
CService service(LookupNumeric(strAddNode, Params().GetDefaultPort(strAddNode)));
|
|
AddedNodeInfo addedNode{strAddNode, CService(), false, false};
|
|
if (service.IsValid()) {
|
|
// strAddNode is an IP:port
|
|
auto it = mapConnected.find(service);
|
|
if (it != mapConnected.end()) {
|
|
addedNode.resolvedAddress = service;
|
|
addedNode.fConnected = true;
|
|
addedNode.fInbound = it->second;
|
|
}
|
|
} else {
|
|
// strAddNode is a name
|
|
auto it = mapConnectedByName.find(strAddNode);
|
|
if (it != mapConnectedByName.end()) {
|
|
addedNode.resolvedAddress = it->second.second;
|
|
addedNode.fConnected = true;
|
|
addedNode.fInbound = it->second.first;
|
|
}
|
|
}
|
|
ret.emplace_back(std::move(addedNode));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void CConnman::ThreadOpenAddedConnections()
|
|
{
|
|
while (true)
|
|
{
|
|
CSemaphoreGrant grant(*semAddnode);
|
|
std::vector<AddedNodeInfo> vInfo = GetAddedNodeInfo();
|
|
bool tried = false;
|
|
for (const AddedNodeInfo& info : vInfo) {
|
|
if (!info.fConnected) {
|
|
if (!grant.TryAcquire()) {
|
|
// If we've used up our semaphore and need a new one, let's not wait here since while we are waiting
|
|
// the addednodeinfo state might change.
|
|
break;
|
|
}
|
|
tried = true;
|
|
CAddress addr(CService(), NODE_NONE);
|
|
OpenNetworkConnection(addr, false, &grant, info.strAddedNode.c_str(), false, false, true);
|
|
if (!interruptNet.sleep_for(std::chrono::milliseconds(500)))
|
|
return;
|
|
}
|
|
}
|
|
// Retry every 60 seconds if a connection was attempted, otherwise two seconds
|
|
if (!interruptNet.sleep_for(std::chrono::seconds(tried ? 60 : 2)))
|
|
return;
|
|
}
|
|
}
|
|
|
|
void CConnman::ThreadOpenMasternodeConnections()
|
|
{
|
|
// Connecting to specific addresses, no masternode connections available
|
|
if (gArgs.IsArgSet("-connect") && gArgs.GetArgs("-connect").size() > 0)
|
|
return;
|
|
|
|
auto& chainParams = Params();
|
|
|
|
bool didConnect = false;
|
|
while (!interruptNet)
|
|
{
|
|
auto sleepTime = std::chrono::milliseconds(1000);
|
|
if (didConnect) {
|
|
sleepTime = std::chrono::milliseconds(100);
|
|
}
|
|
if (!interruptNet.sleep_for(sleepTime))
|
|
return;
|
|
|
|
didConnect = false;
|
|
|
|
if (!fNetworkActive || !::masternodeSync->IsBlockchainSynced())
|
|
continue;
|
|
|
|
std::set<CService> connectedNodes;
|
|
std::map<uint256 /*proTxHash*/, bool /*fInbound*/> connectedProRegTxHashes;
|
|
ForEachNode([&](const CNode* pnode) {
|
|
auto verifiedProRegTxHash = pnode->GetVerifiedProRegTxHash();
|
|
connectedNodes.emplace(pnode->addr);
|
|
if (!verifiedProRegTxHash.IsNull()) {
|
|
connectedProRegTxHashes.emplace(verifiedProRegTxHash, pnode->fInbound);
|
|
}
|
|
});
|
|
|
|
auto mnList = deterministicMNManager->GetListAtChainTip();
|
|
|
|
if (interruptNet)
|
|
return;
|
|
|
|
int64_t nANow = GetAdjustedTime();
|
|
constexpr const auto &_func_ = __func__;
|
|
|
|
// NOTE: Process only one pending masternode at a time
|
|
|
|
MasternodeProbeConn isProbe = MasternodeProbeConn::IsNotConnection;
|
|
|
|
const auto getPendingQuorumNodes = [&]() {
|
|
LockAssertion lock(cs_vPendingMasternodes);
|
|
std::vector<CDeterministicMNCPtr> ret;
|
|
for (const auto& group : masternodeQuorumNodes) {
|
|
for (const auto& proRegTxHash : group.second) {
|
|
auto dmn = mnList.GetMN(proRegTxHash);
|
|
if (!dmn) {
|
|
continue;
|
|
}
|
|
const auto& addr2 = dmn->pdmnState->addr;
|
|
if (connectedNodes.count(addr2) && !connectedProRegTxHashes.count(proRegTxHash)) {
|
|
// we probably connected to it before it became a masternode
|
|
// or maybe we are still waiting for mnauth
|
|
(void)ForNode(addr2, [&](CNode* pnode) {
|
|
if (pnode->nTimeFirstMessageReceived != 0 && GetSystemTimeInSeconds() - pnode->nTimeFirstMessageReceived > 5) {
|
|
// clearly not expecting mnauth to take that long even if it wasn't the first message
|
|
// we received (as it should normally), disconnect
|
|
LogPrint(BCLog::NET_NETCONN, "CConnman::%s -- dropping non-mnauth connection to %s, service=%s\n", _func_, proRegTxHash.ToString(), addr2.ToString(false));
|
|
pnode->fDisconnect = true;
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
// either way - it's not ready, skip it for now
|
|
continue;
|
|
}
|
|
if (!connectedNodes.count(addr2) && !IsMasternodeOrDisconnectRequested(addr2) && !connectedProRegTxHashes.count(proRegTxHash)) {
|
|
int64_t lastAttempt = mmetaman.GetMetaInfo(dmn->proTxHash)->GetLastOutboundAttempt();
|
|
// back off trying connecting to an address if we already tried recently
|
|
if (nANow - lastAttempt < chainParams.LLMQConnectionRetryTimeout()) {
|
|
continue;
|
|
}
|
|
ret.emplace_back(dmn);
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
const auto getPendingProbes = [&]() {
|
|
LockAssertion lock(cs_vPendingMasternodes);
|
|
std::vector<CDeterministicMNCPtr> ret;
|
|
for (auto it = masternodePendingProbes.begin(); it != masternodePendingProbes.end(); ) {
|
|
auto dmn = mnList.GetMN(*it);
|
|
if (!dmn) {
|
|
it = masternodePendingProbes.erase(it);
|
|
continue;
|
|
}
|
|
bool connectedAndOutbound = connectedProRegTxHashes.count(dmn->proTxHash) && !connectedProRegTxHashes[dmn->proTxHash];
|
|
if (connectedAndOutbound) {
|
|
// we already have an outbound connection to this MN so there is no theed to probe it again
|
|
mmetaman.GetMetaInfo(dmn->proTxHash)->SetLastOutboundSuccess(nANow);
|
|
it = masternodePendingProbes.erase(it);
|
|
continue;
|
|
}
|
|
|
|
++it;
|
|
|
|
int64_t lastAttempt = mmetaman.GetMetaInfo(dmn->proTxHash)->GetLastOutboundAttempt();
|
|
// back off trying connecting to an address if we already tried recently
|
|
if (nANow - lastAttempt < chainParams.LLMQConnectionRetryTimeout()) {
|
|
continue;
|
|
}
|
|
ret.emplace_back(dmn);
|
|
}
|
|
return ret;
|
|
};
|
|
|
|
auto getConnectToDmn = [&]() -> CDeterministicMNCPtr {
|
|
// don't hold lock while calling OpenMasternodeConnection as cs_main is locked deep inside
|
|
LOCK2(cs_vNodes, cs_vPendingMasternodes);
|
|
|
|
if (!vPendingMasternodes.empty()) {
|
|
auto dmn = mnList.GetValidMN(vPendingMasternodes.front());
|
|
vPendingMasternodes.erase(vPendingMasternodes.begin());
|
|
if (dmn && !connectedNodes.count(dmn->pdmnState->addr) && !IsMasternodeOrDisconnectRequested(dmn->pdmnState->addr)) {
|
|
LogPrint(BCLog::NET_NETCONN, "CConnman::%s -- opening pending masternode connection to %s, service=%s\n", _func_, dmn->proTxHash.ToString(), dmn->pdmnState->addr.ToString(false));
|
|
return dmn;
|
|
}
|
|
}
|
|
|
|
if (const auto pending = getPendingQuorumNodes(); !pending.empty()) {
|
|
// not-null
|
|
auto dmn = pending[GetRand(pending.size())];
|
|
LogPrint(BCLog::NET_NETCONN, "CConnman::%s -- opening quorum connection to %s, service=%s\n",
|
|
_func_, dmn->proTxHash.ToString(), dmn->pdmnState->addr.ToString(false));
|
|
return dmn;
|
|
}
|
|
|
|
if (const auto pending = getPendingProbes(); !pending.empty()) {
|
|
// not-null
|
|
auto dmn = pending[GetRand(pending.size())];
|
|
masternodePendingProbes.erase(dmn->proTxHash);
|
|
isProbe = MasternodeProbeConn::IsConnection;
|
|
|
|
LogPrint(BCLog::NET_NETCONN, "CConnman::%s -- probing masternode %s, service=%s\n", _func_, dmn->proTxHash.ToString(), dmn->pdmnState->addr.ToString(false));
|
|
return dmn;
|
|
}
|
|
return nullptr;
|
|
};
|
|
|
|
CDeterministicMNCPtr connectToDmn = getConnectToDmn();
|
|
|
|
if (connectToDmn == nullptr) {
|
|
continue;
|
|
}
|
|
|
|
didConnect = true;
|
|
|
|
mmetaman.GetMetaInfo(connectToDmn->proTxHash)->SetLastOutboundAttempt(nANow);
|
|
|
|
OpenMasternodeConnection(CAddress(connectToDmn->pdmnState->addr, NODE_NETWORK), isProbe);
|
|
// should be in the list now if connection was opened
|
|
bool connected = ForNode(connectToDmn->pdmnState->addr, CConnman::AllNodes, [&](CNode* pnode) {
|
|
if (pnode->fDisconnect) {
|
|
return false;
|
|
}
|
|
return true;
|
|
});
|
|
if (!connected) {
|
|
LogPrint(BCLog::NET_NETCONN, "CConnman::%s -- connection failed for masternode %s, service=%s\n", __func__, connectToDmn->proTxHash.ToString(), connectToDmn->pdmnState->addr.ToString(false));
|
|
// Will take a few consequent failed attempts to PoSe-punish a MN.
|
|
if (mmetaman.GetMetaInfo(connectToDmn->proTxHash)->OutboundFailedTooManyTimes()) {
|
|
LogPrint(BCLog::NET_NETCONN, "CConnman::%s -- failed to connect to masternode %s too many times\n", __func__, connectToDmn->proTxHash.ToString());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// if successful, this moves the passed grant to the constructed node
|
|
void CConnman::OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound, const char *pszDest, bool fOneShot, bool fFeeler, bool manual_connection, bool block_relay_only, MasternodeConn masternode_connection, MasternodeProbeConn masternode_probe_connection)
|
|
{
|
|
//
|
|
// Initiate outbound network connection
|
|
//
|
|
if (interruptNet) {
|
|
return;
|
|
}
|
|
if (!fNetworkActive) {
|
|
return;
|
|
}
|
|
|
|
auto getIpStr = [&]() {
|
|
if (fLogIPs) {
|
|
return addrConnect.ToString(false);
|
|
} else {
|
|
return std::string("new peer");
|
|
}
|
|
};
|
|
|
|
if (!pszDest) {
|
|
// banned, discouraged or exact match?
|
|
if ((m_banman && (m_banman->IsDiscouraged(addrConnect) || m_banman->IsBanned(addrConnect))) || FindNode(addrConnect.ToStringIPPort()))
|
|
return;
|
|
// local and not a connection to itself?
|
|
bool fAllowLocal = Params().AllowMultiplePorts() && addrConnect.GetPort() != GetListenPort();
|
|
if (!fAllowLocal && IsLocal(addrConnect))
|
|
return;
|
|
// Search for IP:PORT match:
|
|
// - if multiple ports for the same IP are allowed,
|
|
// - for probe connections
|
|
// Search for IP-only match otherwise
|
|
bool searchIPPort = Params().AllowMultiplePorts() || masternode_probe_connection == MasternodeProbeConn::IsConnection;
|
|
bool skip = searchIPPort ?
|
|
FindNode(static_cast<CService>(addrConnect)) :
|
|
FindNode(static_cast<CNetAddr>(addrConnect));
|
|
if (skip) {
|
|
LogPrintf("CConnman::%s -- Failed to open new connection to %s, already connected\n", __func__, getIpStr());
|
|
return;
|
|
}
|
|
} else if (FindNode(std::string(pszDest)))
|
|
return;
|
|
|
|
LogPrint(BCLog::NET_NETCONN, "CConnman::%s -- connecting to %s\n", __func__, getIpStr());
|
|
CNode* pnode = ConnectNode(addrConnect, pszDest, fCountFailure, manual_connection, block_relay_only);
|
|
|
|
if (!pnode) {
|
|
LogPrint(BCLog::NET_NETCONN, "CConnman::%s -- ConnectNode failed for %s\n", __func__, getIpStr());
|
|
return;
|
|
}
|
|
|
|
{
|
|
LOCK(pnode->cs_hSocket);
|
|
LogPrint(BCLog::NET_NETCONN, "CConnman::%s -- successfully connected to %s, sock=%d, peer=%d\n", __func__, getIpStr(), pnode->hSocket, pnode->GetId());
|
|
}
|
|
|
|
if (grantOutbound)
|
|
grantOutbound->MoveTo(pnode->grantOutbound);
|
|
if (fOneShot)
|
|
pnode->fOneShot = true;
|
|
if (fFeeler)
|
|
pnode->fFeeler = true;
|
|
if (manual_connection)
|
|
pnode->m_manual_connection = true;
|
|
if (masternode_connection == MasternodeConn::IsConnection)
|
|
pnode->m_masternode_connection = true;
|
|
if (masternode_probe_connection == MasternodeProbeConn::IsConnection)
|
|
pnode->m_masternode_probe_connection = true;
|
|
|
|
{
|
|
LOCK2(cs_vNodes, pnode->cs_hSocket);
|
|
mapSocketToNode.emplace(pnode->hSocket, pnode);
|
|
}
|
|
|
|
m_msgproc->InitializeNode(pnode);
|
|
{
|
|
LOCK(cs_vNodes);
|
|
vNodes.push_back(pnode);
|
|
RegisterEvents(pnode);
|
|
WakeSelect();
|
|
}
|
|
}
|
|
|
|
void CConnman::OpenMasternodeConnection(const CAddress &addrConnect, MasternodeProbeConn probe) {
|
|
OpenNetworkConnection(addrConnect, false, nullptr, nullptr, false, false, false, false, MasternodeConn::IsConnection, probe);
|
|
}
|
|
|
|
void CConnman::ThreadMessageHandler()
|
|
{
|
|
int64_t nLastSendMessagesTimeMasternodes = 0;
|
|
|
|
while (!flagInterruptMsgProc)
|
|
{
|
|
std::vector<CNode*> vNodesCopy = CopyNodeVector();
|
|
|
|
bool fMoreWork = false;
|
|
|
|
bool fSkipSendMessagesForMasternodes = true;
|
|
if (GetTimeMillis() - nLastSendMessagesTimeMasternodes >= 100) {
|
|
fSkipSendMessagesForMasternodes = false;
|
|
nLastSendMessagesTimeMasternodes = GetTimeMillis();
|
|
}
|
|
|
|
for (CNode* pnode : vNodesCopy)
|
|
{
|
|
if (pnode->fDisconnect)
|
|
continue;
|
|
|
|
// Receive messages
|
|
bool fMoreNodeWork = m_msgproc->ProcessMessages(pnode, flagInterruptMsgProc);
|
|
fMoreWork |= (fMoreNodeWork && !pnode->fPauseSend);
|
|
if (flagInterruptMsgProc)
|
|
return;
|
|
// Send messages
|
|
if (!fSkipSendMessagesForMasternodes || !pnode->m_masternode_connection) {
|
|
LOCK(pnode->cs_sendProcessing);
|
|
m_msgproc->SendMessages(pnode);
|
|
}
|
|
|
|
if (flagInterruptMsgProc)
|
|
return;
|
|
}
|
|
|
|
ReleaseNodeVector(vNodesCopy);
|
|
|
|
WAIT_LOCK(mutexMsgProc, lock);
|
|
if (!fMoreWork) {
|
|
condMsgProc.wait_until(lock, std::chrono::steady_clock::now() + std::chrono::milliseconds(100), [this]() EXCLUSIVE_LOCKS_REQUIRED(mutexMsgProc) { return fMsgProcWake; });
|
|
}
|
|
fMsgProcWake = false;
|
|
}
|
|
}
|
|
|
|
void CConnman::ThreadI2PAcceptIncoming()
|
|
{
|
|
static constexpr auto err_wait_begin = 1s;
|
|
static constexpr auto err_wait_cap = 5min;
|
|
auto err_wait = err_wait_begin;
|
|
|
|
bool advertising_listen_addr = false;
|
|
i2p::Connection conn;
|
|
|
|
while (!interruptNet) {
|
|
|
|
if (!m_i2p_sam_session->Listen(conn)) {
|
|
if (advertising_listen_addr && conn.me.IsValid()) {
|
|
RemoveLocal(conn.me);
|
|
advertising_listen_addr = false;
|
|
}
|
|
|
|
interruptNet.sleep_for(err_wait);
|
|
if (err_wait < err_wait_cap) {
|
|
err_wait *= 2;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (!advertising_listen_addr) {
|
|
AddLocal(conn.me, LOCAL_BIND);
|
|
advertising_listen_addr = true;
|
|
}
|
|
|
|
if (!m_i2p_sam_session->Accept(conn)) {
|
|
continue;
|
|
}
|
|
|
|
CreateNodeFromAcceptedSocket(conn.sock->Release(), NetPermissionFlags::PF_NONE,
|
|
CAddress{conn.me, NODE_NONE}, CAddress{conn.peer, NODE_NONE});
|
|
}
|
|
}
|
|
|
|
bool CConnman::BindListenPort(const CService& addrBind, bilingual_str& strError, NetPermissionFlags permissions)
|
|
{
|
|
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(Untranslated("Error: Bind address family for %s not supported"), addrBind.ToString());
|
|
LogPrintf("%s\n", strError.original);
|
|
return false;
|
|
}
|
|
|
|
std::unique_ptr<Sock> sock = CreateSock(addrBind);
|
|
if (!sock) {
|
|
strError = strprintf(Untranslated("Error: Couldn't open socket for incoming connections (socket returned error %s)"), NetworkErrorString(WSAGetLastError()));
|
|
LogPrintf("%s\n", strError.original);
|
|
return false;
|
|
}
|
|
|
|
// Allow binding if the port is still in TIME_WAIT state after
|
|
// the program was closed and restarted.
|
|
setsockopt(sock->Get(), SOL_SOCKET, SO_REUSEADDR, (sockopt_arg_type)&nOne, sizeof(int));
|
|
|
|
// 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
|
|
setsockopt(sock->Get(), IPPROTO_IPV6, IPV6_V6ONLY, (sockopt_arg_type)&nOne, sizeof(int));
|
|
#endif
|
|
#ifdef WIN32
|
|
int nProtLevel = PROTECTION_LEVEL_UNRESTRICTED;
|
|
setsockopt(sock->Get(), IPPROTO_IPV6, IPV6_PROTECTION_LEVEL, (const char*)&nProtLevel, sizeof(int));
|
|
#endif
|
|
}
|
|
|
|
if (::bind(sock->Get(), (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR)
|
|
{
|
|
int nErr = WSAGetLastError();
|
|
if (nErr == WSAEADDRINUSE)
|
|
strError = strprintf(_("Unable to bind to %s on this computer. %s is probably already running."), addrBind.ToString(), PACKAGE_NAME);
|
|
else
|
|
strError = strprintf(_("Unable to bind to %s on this computer (bind returned error %s)"), addrBind.ToString(), NetworkErrorString(nErr));
|
|
LogPrintf("%s\n", strError.original);
|
|
return false;
|
|
}
|
|
LogPrintf("Bound to %s\n", addrBind.ToString());
|
|
|
|
// Listen for incoming connections
|
|
if (listen(sock->Get(), SOMAXCONN) == SOCKET_ERROR)
|
|
{
|
|
strError = strprintf(_("Error: Listening for incoming connections failed (listen returned error %s)"), NetworkErrorString(WSAGetLastError()));
|
|
LogPrintf("%s\n", strError.original);
|
|
return false;
|
|
}
|
|
|
|
#ifdef USE_KQUEUE
|
|
if (socketEventsMode == SOCKETEVENTS_KQUEUE) {
|
|
struct kevent event;
|
|
EV_SET(&event, sock->Get(), EVFILT_READ, EV_ADD, 0, 0, nullptr);
|
|
if (kevent(kqueuefd, &event, 1, nullptr, 0, nullptr) != 0) {
|
|
strError = strprintf(_("Error: failed to add socket to kqueuefd (kevent returned error %s)"), NetworkErrorString(WSAGetLastError()));
|
|
LogPrintf("%s\n", strError.original);
|
|
return false;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_EPOLL
|
|
if (socketEventsMode == SOCKETEVENTS_EPOLL) {
|
|
epoll_event event;
|
|
event.data.fd = sock->Get();
|
|
event.events = EPOLLIN;
|
|
if (epoll_ctl(epollfd, EPOLL_CTL_ADD, sock->Get(), &event) != 0) {
|
|
strError = strprintf(_("Error: failed to add socket to epollfd (epoll_ctl returned error %s)"), NetworkErrorString(WSAGetLastError()));
|
|
LogPrintf("%s\n", strError.original);
|
|
return false;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
vhListenSocket.push_back(ListenSocket(sock->Release(), permissions));
|
|
|
|
return true;
|
|
}
|
|
|
|
void Discover()
|
|
{
|
|
if (!fDiscover)
|
|
return;
|
|
|
|
#ifdef WIN32
|
|
// Get local host IP
|
|
char pszHostName[256] = "";
|
|
if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR)
|
|
{
|
|
std::vector<CNetAddr> vaddr;
|
|
if (LookupHost(pszHostName, vaddr, 0, true))
|
|
{
|
|
for (const CNetAddr &addr : vaddr)
|
|
{
|
|
if (AddLocal(addr, LOCAL_IF))
|
|
LogPrintf("%s: %s - %s\n", __func__, pszHostName, addr.ToString());
|
|
}
|
|
}
|
|
}
|
|
#elif (HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS)
|
|
// Get local host ip
|
|
struct ifaddrs* myaddrs;
|
|
if (getifaddrs(&myaddrs) == 0)
|
|
{
|
|
for (struct ifaddrs* ifa = myaddrs; ifa != nullptr; ifa = ifa->ifa_next)
|
|
{
|
|
if (ifa->ifa_addr == nullptr) 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 CConnman::SetNetworkActive(bool active)
|
|
{
|
|
LogPrint(BCLog::NET, "SetNetworkActive: %s\n", active);
|
|
|
|
if (fNetworkActive == active) {
|
|
return;
|
|
}
|
|
|
|
fNetworkActive = active;
|
|
|
|
// Always call the Reset() if the network gets enabled/disabled to make sure the sync process
|
|
// gets a reset if its outdated..
|
|
::masternodeSync->Reset();
|
|
|
|
uiInterface.NotifyNetworkActiveChanged(fNetworkActive);
|
|
}
|
|
|
|
CConnman::CConnman(uint64_t nSeed0In, uint64_t nSeed1In, CAddrMan& addrman_in) :
|
|
addrman(addrman_in), nSeed0(nSeed0In), nSeed1(nSeed1In)
|
|
{
|
|
SetTryNewOutboundPeer(false);
|
|
|
|
Options connOptions;
|
|
Init(connOptions);
|
|
}
|
|
|
|
NodeId CConnman::GetNewNodeId()
|
|
{
|
|
return nLastNodeId.fetch_add(1, std::memory_order_relaxed);
|
|
}
|
|
|
|
|
|
bool CConnman::Bind(const CService &addr, unsigned int flags, NetPermissionFlags permissions) {
|
|
if (!(flags & BF_EXPLICIT) && !IsReachable(addr))
|
|
return false;
|
|
bilingual_str strError;
|
|
if (!BindListenPort(addr, strError, permissions)) {
|
|
if ((flags & BF_REPORT_ERROR) && clientInterface) {
|
|
clientInterface->ThreadSafeMessageBox(strError, "", CClientUIInterface::MSG_ERROR);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
if (addr.IsRoutable() && fDiscover && !(flags & BF_DONT_ADVERTISE) && !(permissions & PF_NOBAN)) {
|
|
AddLocal(addr, LOCAL_BIND);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CConnman::InitBinds(
|
|
const std::vector<CService>& binds,
|
|
const std::vector<NetWhitebindPermissions>& whiteBinds,
|
|
const std::vector<CService>& onion_binds)
|
|
{
|
|
bool fBound = false;
|
|
for (const auto& addrBind : binds) {
|
|
fBound |= Bind(addrBind, (BF_EXPLICIT | BF_REPORT_ERROR), NetPermissionFlags::PF_NONE);
|
|
}
|
|
for (const auto& addrBind : whiteBinds) {
|
|
fBound |= Bind(addrBind.m_service, (BF_EXPLICIT | BF_REPORT_ERROR), addrBind.m_flags);
|
|
}
|
|
if (binds.empty() && whiteBinds.empty()) {
|
|
struct in_addr inaddr_any;
|
|
inaddr_any.s_addr = htonl(INADDR_ANY);
|
|
struct in6_addr inaddr6_any = IN6ADDR_ANY_INIT;
|
|
fBound |= Bind(CService(inaddr6_any, GetListenPort()), BF_NONE, NetPermissionFlags::PF_NONE);
|
|
fBound |= Bind(CService(inaddr_any, GetListenPort()), !fBound ? BF_REPORT_ERROR : BF_NONE, NetPermissionFlags::PF_NONE);
|
|
}
|
|
|
|
for (const auto& addr_bind : onion_binds) {
|
|
fBound |= Bind(addr_bind, BF_EXPLICIT | BF_DONT_ADVERTISE, NetPermissionFlags::PF_NONE);
|
|
}
|
|
|
|
return fBound;
|
|
}
|
|
|
|
bool CConnman::Start(CScheduler& scheduler, const Options& connOptions)
|
|
{
|
|
Init(connOptions);
|
|
|
|
#ifdef USE_KQUEUE
|
|
if (socketEventsMode == SOCKETEVENTS_KQUEUE) {
|
|
kqueuefd = kqueue();
|
|
if (kqueuefd == -1) {
|
|
LogPrintf("kqueue failed\n");
|
|
return false;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef USE_EPOLL
|
|
if (socketEventsMode == SOCKETEVENTS_EPOLL) {
|
|
epollfd = epoll_create1(0);
|
|
if (epollfd == -1) {
|
|
LogPrintf("epoll_create1 failed\n");
|
|
return false;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (fListen && !InitBinds(connOptions.vBinds, connOptions.vWhiteBinds, connOptions.onion_binds)) {
|
|
if (clientInterface) {
|
|
clientInterface->ThreadSafeMessageBox(
|
|
_("Failed to listen on any port. Use -listen=0 if you want this."),
|
|
"", CClientUIInterface::MSG_ERROR);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
proxyType i2p_sam;
|
|
if (GetProxy(NET_I2P, i2p_sam)) {
|
|
m_i2p_sam_session = std::make_unique<i2p::sam::Session>(GetDataDir() / "i2p_private_key",
|
|
i2p_sam.proxy, &interruptNet);
|
|
}
|
|
|
|
for (const auto& strDest : connOptions.vSeedNodes) {
|
|
AddOneShot(strDest);
|
|
}
|
|
|
|
if (clientInterface) {
|
|
clientInterface->InitMessage(_("Loading P2P addresses...").translated);
|
|
}
|
|
// Load addresses from peers.dat
|
|
int64_t nStart = GetTimeMillis();
|
|
{
|
|
CAddrDB adb;
|
|
if (adb.Read(addrman))
|
|
LogPrintf("Loaded %i addresses from peers.dat %dms\n", addrman.size(), GetTimeMillis() - nStart);
|
|
else {
|
|
addrman.Clear(); // Addrman can be in an inconsistent state after failure, reset it
|
|
LogPrintf("Recreating peers.dat\n");
|
|
DumpAddresses();
|
|
}
|
|
}
|
|
|
|
uiInterface.InitMessage(_("Starting network threads...").translated);
|
|
|
|
fAddressesInitialized = true;
|
|
|
|
if (semOutbound == nullptr) {
|
|
// initialize semaphore
|
|
semOutbound = std::make_unique<CSemaphore>(std::min(m_max_outbound, nMaxConnections));
|
|
}
|
|
if (semAddnode == nullptr) {
|
|
// initialize semaphore
|
|
semAddnode = std::make_unique<CSemaphore>(nMaxAddnode);
|
|
}
|
|
|
|
//
|
|
// Start threads
|
|
//
|
|
assert(m_msgproc);
|
|
InterruptSocks5(false);
|
|
interruptNet.reset();
|
|
flagInterruptMsgProc = false;
|
|
|
|
{
|
|
LOCK(mutexMsgProc);
|
|
fMsgProcWake = false;
|
|
}
|
|
|
|
#ifdef USE_WAKEUP_PIPE
|
|
if (pipe(wakeupPipe) != 0) {
|
|
wakeupPipe[0] = wakeupPipe[1] = -1;
|
|
LogPrint(BCLog::NET, "pipe() for wakeupPipe failed\n");
|
|
} else {
|
|
int fFlags = fcntl(wakeupPipe[0], F_GETFL, 0);
|
|
if (fcntl(wakeupPipe[0], F_SETFL, fFlags | O_NONBLOCK) == -1) {
|
|
LogPrint(BCLog::NET, "fcntl for O_NONBLOCK on wakeupPipe failed\n");
|
|
}
|
|
fFlags = fcntl(wakeupPipe[1], F_GETFL, 0);
|
|
if (fcntl(wakeupPipe[1], F_SETFL, fFlags | O_NONBLOCK) == -1) {
|
|
LogPrint(BCLog::NET, "fcntl for O_NONBLOCK on wakeupPipe failed\n");
|
|
}
|
|
#ifdef USE_KQUEUE
|
|
if (socketEventsMode == SOCKETEVENTS_KQUEUE) {
|
|
struct kevent event;
|
|
EV_SET(&event, wakeupPipe[0], EVFILT_READ, EV_ADD, 0, 0, nullptr);
|
|
int r = kevent(kqueuefd, &event, 1, nullptr, 0, nullptr);
|
|
if (r != 0) {
|
|
LogPrint(BCLog::NET, "%s -- kevent(%d, %d, %d, ...) failed. error: %s\n", __func__,
|
|
kqueuefd, EV_ADD, wakeupPipe[0], NetworkErrorString(WSAGetLastError()));
|
|
return false;
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef USE_EPOLL
|
|
if (socketEventsMode == SOCKETEVENTS_EPOLL) {
|
|
epoll_event event;
|
|
event.events = EPOLLIN;
|
|
event.data.fd = wakeupPipe[0];
|
|
int r = epoll_ctl(epollfd, EPOLL_CTL_ADD, wakeupPipe[0], &event);
|
|
if (r != 0) {
|
|
LogPrint(BCLog::NET, "%s -- epoll_ctl(%d, %d, %d, ...) failed. error: %s\n", __func__,
|
|
epollfd, EPOLL_CTL_ADD, wakeupPipe[0], NetworkErrorString(WSAGetLastError()));
|
|
return false;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
// Send and receive from sockets, accept connections
|
|
threadSocketHandler = std::thread(&TraceThread<std::function<void()> >, "net", std::function<void()>(std::bind(&CConnman::ThreadSocketHandler, this)));
|
|
|
|
if (!gArgs.GetBoolArg("-dnsseed", true))
|
|
LogPrintf("DNS seeding disabled\n");
|
|
else
|
|
threadDNSAddressSeed = std::thread(&TraceThread<std::function<void()> >, "dnsseed", std::function<void()>(std::bind(&CConnman::ThreadDNSAddressSeed, this)));
|
|
|
|
// Initiate outbound connections from -addnode
|
|
threadOpenAddedConnections = std::thread(&TraceThread<std::function<void()> >, "addcon", std::function<void()>(std::bind(&CConnman::ThreadOpenAddedConnections, this)));
|
|
|
|
if (connOptions.m_use_addrman_outgoing && !connOptions.m_specified_outgoing.empty()) {
|
|
if (clientInterface) {
|
|
clientInterface->ThreadSafeMessageBox(
|
|
_("Cannot provide specific connections and have addrman find outgoing connections at the same."),
|
|
"", CClientUIInterface::MSG_ERROR);
|
|
}
|
|
return false;
|
|
}
|
|
if (connOptions.m_use_addrman_outgoing || !connOptions.m_specified_outgoing.empty())
|
|
threadOpenConnections = std::thread(&TraceThread<std::function<void()> >, "opencon", std::function<void()>(std::bind(&CConnman::ThreadOpenConnections, this, connOptions.m_specified_outgoing)));
|
|
|
|
// Initiate masternode connections
|
|
threadOpenMasternodeConnections = std::thread(&TraceThread<std::function<void()> >, "mncon", std::function<void()>(std::bind(&CConnman::ThreadOpenMasternodeConnections, this)));
|
|
|
|
// Process messages
|
|
threadMessageHandler = std::thread(&TraceThread<std::function<void()> >, "msghand", std::function<void()>(std::bind(&CConnman::ThreadMessageHandler, this)));
|
|
|
|
if (connOptions.m_i2p_accept_incoming && m_i2p_sam_session.get() != nullptr) {
|
|
threadI2PAcceptIncoming =
|
|
std::thread(&TraceThread<std::function<void()>>, "i2paccept",
|
|
std::function<void()>(std::bind(&CConnman::ThreadI2PAcceptIncoming, this)));
|
|
}
|
|
|
|
// Dump network addresses
|
|
scheduler.scheduleEvery([this] { DumpAddresses(); }, DUMP_PEERS_INTERVAL);
|
|
|
|
return true;
|
|
}
|
|
|
|
class CNetCleanup
|
|
{
|
|
public:
|
|
CNetCleanup() {}
|
|
|
|
~CNetCleanup()
|
|
{
|
|
#ifdef WIN32
|
|
// Shutdown Windows Sockets
|
|
WSACleanup();
|
|
#endif
|
|
}
|
|
};
|
|
static CNetCleanup instance_of_cnetcleanup;
|
|
|
|
void CExplicitNetCleanup::callCleanup()
|
|
{
|
|
// Explicit call to destructor of CNetCleanup because it's not implicitly called
|
|
// when the wallet is restarted from within the wallet itself.
|
|
CNetCleanup *tmp = new CNetCleanup();
|
|
delete tmp; // Stroustrup's gonna kill me for that
|
|
}
|
|
|
|
void CConnman::Interrupt()
|
|
{
|
|
{
|
|
LOCK(mutexMsgProc);
|
|
flagInterruptMsgProc = true;
|
|
}
|
|
condMsgProc.notify_all();
|
|
|
|
interruptNet();
|
|
InterruptSocks5(true);
|
|
|
|
if (semOutbound) {
|
|
for (int i=0; i<m_max_outbound; i++) {
|
|
semOutbound->post();
|
|
}
|
|
}
|
|
|
|
if (semAddnode) {
|
|
for (int i=0; i<nMaxAddnode; i++) {
|
|
semAddnode->post();
|
|
}
|
|
}
|
|
}
|
|
|
|
void CConnman::StopThreads()
|
|
{
|
|
if (threadI2PAcceptIncoming.joinable()) {
|
|
threadI2PAcceptIncoming.join();
|
|
}
|
|
if (threadMessageHandler.joinable())
|
|
threadMessageHandler.join();
|
|
if (threadOpenMasternodeConnections.joinable())
|
|
threadOpenMasternodeConnections.join();
|
|
if (threadOpenConnections.joinable())
|
|
threadOpenConnections.join();
|
|
if (threadOpenAddedConnections.joinable())
|
|
threadOpenAddedConnections.join();
|
|
if (threadDNSAddressSeed.joinable())
|
|
threadDNSAddressSeed.join();
|
|
if (threadSocketHandler.joinable())
|
|
threadSocketHandler.join();
|
|
}
|
|
|
|
void CConnman::StopNodes()
|
|
{
|
|
if (fAddressesInitialized) {
|
|
DumpAddresses();
|
|
fAddressesInitialized = false;
|
|
}
|
|
|
|
{
|
|
LOCK(cs_vNodes);
|
|
|
|
// Close sockets
|
|
for (CNode *pnode : vNodes)
|
|
pnode->CloseSocketDisconnect(this);
|
|
}
|
|
for (ListenSocket& hListenSocket : vhListenSocket)
|
|
if (hListenSocket.socket != INVALID_SOCKET) {
|
|
#ifdef USE_KQUEUE
|
|
if (socketEventsMode == SOCKETEVENTS_KQUEUE) {
|
|
struct kevent event;
|
|
EV_SET(&event, hListenSocket.socket, EVFILT_READ, EV_DELETE, 0, 0, nullptr);
|
|
kevent(kqueuefd, &event, 1, nullptr, 0, nullptr);
|
|
}
|
|
#endif
|
|
#ifdef USE_EPOLL
|
|
if (socketEventsMode == SOCKETEVENTS_EPOLL) {
|
|
epoll_ctl(epollfd, EPOLL_CTL_DEL, hListenSocket.socket, nullptr);
|
|
}
|
|
#endif
|
|
if (!CloseSocket(hListenSocket.socket))
|
|
LogPrintf("CloseSocket(hListenSocket) failed with error %s\n", NetworkErrorString(WSAGetLastError()));
|
|
}
|
|
|
|
// clean up some globals (to help leak detection)
|
|
std::vector<CNode*> nodes;
|
|
WITH_LOCK(cs_vNodes, nodes.swap(vNodes));
|
|
for (CNode* pnode : nodes) {
|
|
DeleteNode(pnode);
|
|
}
|
|
for (CNode* pnode : vNodesDisconnected) {
|
|
DeleteNode(pnode);
|
|
}
|
|
mapSocketToNode.clear();
|
|
{
|
|
LOCK(cs_vNodes);
|
|
mapReceivableNodes.clear();
|
|
}
|
|
{
|
|
LOCK(cs_mapNodesWithDataToSend);
|
|
mapNodesWithDataToSend.clear();
|
|
}
|
|
vNodesDisconnected.clear();
|
|
vhListenSocket.clear();
|
|
semOutbound.reset();
|
|
semAddnode.reset();
|
|
|
|
#ifdef USE_KQUEUE
|
|
if (socketEventsMode == SOCKETEVENTS_KQUEUE && kqueuefd != -1) {
|
|
#ifdef USE_WAKEUP_PIPE
|
|
struct kevent event;
|
|
EV_SET(&event, wakeupPipe[0], EVFILT_READ, EV_DELETE, 0, 0, nullptr);
|
|
kevent(kqueuefd, &event, 1, nullptr, 0, nullptr);
|
|
#endif
|
|
close(kqueuefd);
|
|
}
|
|
kqueuefd = -1;
|
|
#endif
|
|
#ifdef USE_EPOLL
|
|
if (socketEventsMode == SOCKETEVENTS_EPOLL && epollfd != -1) {
|
|
#ifdef USE_WAKEUP_PIPE
|
|
epoll_ctl(epollfd, EPOLL_CTL_DEL, wakeupPipe[0], nullptr);
|
|
#endif
|
|
close(epollfd);
|
|
}
|
|
epollfd = -1;
|
|
#endif
|
|
|
|
#ifdef USE_WAKEUP_PIPE
|
|
if (wakeupPipe[0] != -1) close(wakeupPipe[0]);
|
|
if (wakeupPipe[1] != -1) close(wakeupPipe[1]);
|
|
wakeupPipe[0] = wakeupPipe[1] = -1;
|
|
#endif
|
|
}
|
|
|
|
void CConnman::DeleteNode(CNode* pnode)
|
|
{
|
|
assert(pnode);
|
|
m_msgproc->FinalizeNode(*pnode);
|
|
delete pnode;
|
|
}
|
|
|
|
CConnman::~CConnman()
|
|
{
|
|
Interrupt();
|
|
Stop();
|
|
}
|
|
|
|
std::vector<CAddress> CConnman::GetAddresses(size_t max_addresses, size_t max_pct, std::optional<Network> network)
|
|
{
|
|
std::vector<CAddress> addresses = addrman.GetAddr(max_addresses, max_pct, network);
|
|
if (m_banman) {
|
|
addresses.erase(std::remove_if(addresses.begin(), addresses.end(),
|
|
[this](const CAddress& addr){return m_banman->IsDiscouraged(addr) || m_banman->IsBanned(addr);}),
|
|
addresses.end());
|
|
}
|
|
return addresses;
|
|
}
|
|
|
|
std::vector<CAddress> CConnman::GetAddresses(CNode& requestor, size_t max_addresses, size_t max_pct)
|
|
{
|
|
auto local_socket_bytes = requestor.addrBind.GetAddrBytes();
|
|
uint64_t cache_id = GetDeterministicRandomizer(RANDOMIZER_ID_ADDRCACHE)
|
|
.Write(requestor.addr.GetNetwork())
|
|
.Write(local_socket_bytes.data(), local_socket_bytes.size())
|
|
.Finalize();
|
|
const auto current_time = GetTime<std::chrono::microseconds>();
|
|
auto r = m_addr_response_caches.emplace(cache_id, CachedAddrResponse{});
|
|
CachedAddrResponse& cache_entry = r.first->second;
|
|
if (cache_entry.m_cache_entry_expiration < current_time) { // If emplace() added new one it has expiration 0.
|
|
cache_entry.m_addrs_response_cache = GetAddresses(max_addresses, max_pct, /* network */ std::nullopt);
|
|
// Choosing a proper cache lifetime is a trade-off between the privacy leak minimization
|
|
// and the usefulness of ADDR responses to honest users.
|
|
//
|
|
// Longer cache lifetime makes it more difficult for an attacker to scrape
|
|
// enough AddrMan data to maliciously infer something useful.
|
|
// By the time an attacker scraped enough AddrMan records, most of
|
|
// the records should be old enough to not leak topology info by
|
|
// e.g. analyzing real-time changes in timestamps.
|
|
//
|
|
// It takes only several hundred requests to scrape everything from an AddrMan containing 100,000 nodes,
|
|
// so ~24 hours of cache lifetime indeed makes the data less inferable by the time
|
|
// most of it could be scraped (considering that timestamps are updated via
|
|
// ADDR self-announcements and when nodes communicate).
|
|
// We also should be robust to those attacks which may not require scraping *full* victim's AddrMan
|
|
// (because even several timestamps of the same handful of nodes may leak privacy).
|
|
//
|
|
// On the other hand, longer cache lifetime makes ADDR responses
|
|
// outdated and less useful for an honest requestor, e.g. if most nodes
|
|
// in the ADDR response are no longer active.
|
|
//
|
|
// However, the churn in the network is known to be rather low. Since we consider
|
|
// nodes to be "terrible" (see IsTerrible()) if the timestamps are older than 30 days,
|
|
// max. 24 hours of "penalty" due to cache shouldn't make any meaningful difference
|
|
// in terms of the freshness of the response.
|
|
cache_entry.m_cache_entry_expiration = current_time + std::chrono::hours(21) + GetRandMillis(std::chrono::hours(6));
|
|
}
|
|
return cache_entry.m_addrs_response_cache;
|
|
}
|
|
|
|
bool CConnman::AddNode(const std::string& strNode)
|
|
{
|
|
LOCK(cs_vAddedNodes);
|
|
for (const std::string& it : vAddedNodes) {
|
|
if (strNode == it) return false;
|
|
}
|
|
|
|
vAddedNodes.push_back(strNode);
|
|
return true;
|
|
}
|
|
|
|
bool CConnman::RemoveAddedNode(const std::string& strNode)
|
|
{
|
|
LOCK(cs_vAddedNodes);
|
|
for(std::vector<std::string>::iterator it = vAddedNodes.begin(); it != vAddedNodes.end(); ++it) {
|
|
if (strNode == *it) {
|
|
vAddedNodes.erase(it);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool CConnman::AddPendingMasternode(const uint256& proTxHash)
|
|
{
|
|
LOCK(cs_vPendingMasternodes);
|
|
if (std::find(vPendingMasternodes.begin(), vPendingMasternodes.end(), proTxHash) != vPendingMasternodes.end()) {
|
|
return false;
|
|
}
|
|
|
|
vPendingMasternodes.push_back(proTxHash);
|
|
return true;
|
|
}
|
|
|
|
void CConnman::SetMasternodeQuorumNodes(Consensus::LLMQType llmqType, const uint256& quorumHash, const std::set<uint256>& proTxHashes)
|
|
{
|
|
LOCK(cs_vPendingMasternodes);
|
|
auto it = masternodeQuorumNodes.emplace(std::make_pair(llmqType, quorumHash), proTxHashes);
|
|
if (!it.second) {
|
|
it.first->second = proTxHashes;
|
|
}
|
|
}
|
|
|
|
void CConnman::SetMasternodeQuorumRelayMembers(Consensus::LLMQType llmqType, const uint256& quorumHash, const std::set<uint256>& proTxHashes)
|
|
{
|
|
{
|
|
LOCK(cs_vPendingMasternodes);
|
|
auto it = masternodeQuorumRelayMembers.emplace(std::make_pair(llmqType, quorumHash), proTxHashes);
|
|
if (!it.second) {
|
|
it.first->second = proTxHashes;
|
|
}
|
|
}
|
|
|
|
// Update existing connections
|
|
ForEachNode([&](CNode* pnode) {
|
|
auto verifiedProRegTxHash = pnode->GetVerifiedProRegTxHash();
|
|
if (!verifiedProRegTxHash.IsNull() && !pnode->m_masternode_iqr_connection && IsMasternodeQuorumRelayMember(verifiedProRegTxHash)) {
|
|
// Tell our peer that we're interested in plain LLMQ recovered signatures.
|
|
// Otherwise the peer would only announce/send messages resulting from QRECSIG,
|
|
// e.g. InstantSend locks or ChainLocks. SPV and regular full nodes should not send
|
|
// this message as they are usually only interested in the higher level messages.
|
|
const CNetMsgMaker msgMaker(pnode->GetSendVersion());
|
|
PushMessage(pnode, msgMaker.Make(NetMsgType::QSENDRECSIGS, true));
|
|
pnode->m_masternode_iqr_connection = true;
|
|
}
|
|
});
|
|
}
|
|
|
|
bool CConnman::HasMasternodeQuorumNodes(Consensus::LLMQType llmqType, const uint256& quorumHash)
|
|
{
|
|
LOCK(cs_vPendingMasternodes);
|
|
return masternodeQuorumNodes.count(std::make_pair(llmqType, quorumHash));
|
|
}
|
|
|
|
std::set<uint256> CConnman::GetMasternodeQuorums(Consensus::LLMQType llmqType)
|
|
{
|
|
LOCK(cs_vPendingMasternodes);
|
|
std::set<uint256> result;
|
|
for (const auto& p : masternodeQuorumNodes) {
|
|
if (p.first.first != llmqType) {
|
|
continue;
|
|
}
|
|
result.emplace(p.first.second);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
std::set<NodeId> CConnman::GetMasternodeQuorumNodes(Consensus::LLMQType llmqType, const uint256& quorumHash) const
|
|
{
|
|
LOCK2(cs_vNodes, cs_vPendingMasternodes);
|
|
auto it = masternodeQuorumNodes.find(std::make_pair(llmqType, quorumHash));
|
|
if (it == masternodeQuorumNodes.end()) {
|
|
return {};
|
|
}
|
|
const auto& proRegTxHashes = it->second;
|
|
|
|
std::set<NodeId> nodes;
|
|
for (const auto pnode : vNodes) {
|
|
if (pnode->fDisconnect) {
|
|
continue;
|
|
}
|
|
auto verifiedProRegTxHash = pnode->GetVerifiedProRegTxHash();
|
|
if (!pnode->qwatch && (verifiedProRegTxHash.IsNull() || !proRegTxHashes.count(verifiedProRegTxHash))) {
|
|
continue;
|
|
}
|
|
nodes.emplace(pnode->GetId());
|
|
}
|
|
return nodes;
|
|
}
|
|
|
|
void CConnman::RemoveMasternodeQuorumNodes(Consensus::LLMQType llmqType, const uint256& quorumHash)
|
|
{
|
|
LOCK(cs_vPendingMasternodes);
|
|
masternodeQuorumNodes.erase(std::make_pair(llmqType, quorumHash));
|
|
masternodeQuorumRelayMembers.erase(std::make_pair(llmqType, quorumHash));
|
|
}
|
|
|
|
bool CConnman::IsMasternodeQuorumNode(const CNode* pnode)
|
|
{
|
|
// Let's see if this is an outgoing connection to an address that is known to be a masternode
|
|
// We however only need to know this if the node did not authenticate itself as a MN yet
|
|
uint256 assumedProTxHash;
|
|
if (pnode->GetVerifiedProRegTxHash().IsNull() && !pnode->fInbound) {
|
|
auto mnList = deterministicMNManager->GetListAtChainTip();
|
|
auto dmn = mnList.GetMNByService(pnode->addr);
|
|
if (dmn == nullptr) {
|
|
// This is definitely not a masternode
|
|
return false;
|
|
}
|
|
assumedProTxHash = dmn->proTxHash;
|
|
}
|
|
|
|
LOCK(cs_vPendingMasternodes);
|
|
for (const auto& p : masternodeQuorumNodes) {
|
|
if (!pnode->GetVerifiedProRegTxHash().IsNull()) {
|
|
if (p.second.count(pnode->GetVerifiedProRegTxHash())) {
|
|
return true;
|
|
}
|
|
} else if (!assumedProTxHash.IsNull()) {
|
|
if (p.second.count(assumedProTxHash)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool CConnman::IsMasternodeQuorumRelayMember(const uint256& protxHash)
|
|
{
|
|
if (protxHash.IsNull()) {
|
|
return false;
|
|
}
|
|
LOCK(cs_vPendingMasternodes);
|
|
for (const auto& p : masternodeQuorumRelayMembers) {
|
|
if (p.second.count(protxHash)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void CConnman::AddPendingProbeConnections(const std::set<uint256> &proTxHashes)
|
|
{
|
|
LOCK(cs_vPendingMasternodes);
|
|
masternodePendingProbes.insert(proTxHashes.begin(), proTxHashes.end());
|
|
}
|
|
|
|
size_t CConnman::GetNodeCount(NumConnections flags)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
|
|
int nNum = 0;
|
|
for (const auto& pnode : vNodes) {
|
|
if (pnode->fDisconnect) {
|
|
continue;
|
|
}
|
|
if ((flags & CONNECTIONS_VERIFIED) && pnode->GetVerifiedProRegTxHash().IsNull()) {
|
|
continue;
|
|
}
|
|
if (flags & (pnode->fInbound ? CONNECTIONS_IN : CONNECTIONS_OUT)) {
|
|
nNum++;
|
|
} else if (flags == CONNECTIONS_VERIFIED) {
|
|
nNum++;
|
|
}
|
|
}
|
|
|
|
return nNum;
|
|
}
|
|
|
|
size_t CConnman::GetMaxOutboundNodeCount()
|
|
{
|
|
return m_max_outbound;
|
|
}
|
|
|
|
void CConnman::GetNodeStats(std::vector<CNodeStats>& vstats)
|
|
{
|
|
vstats.clear();
|
|
LOCK(cs_vNodes);
|
|
vstats.reserve(vNodes.size());
|
|
for (CNode* pnode : vNodes) {
|
|
if (pnode->fDisconnect) {
|
|
continue;
|
|
}
|
|
vstats.emplace_back();
|
|
pnode->copyStats(vstats.back(), addrman.m_asmap);
|
|
}
|
|
}
|
|
|
|
bool CConnman::DisconnectNode(const std::string& strNode)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
if (CNode* pnode = FindNode(strNode)) {
|
|
pnode->fDisconnect = true;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool CConnman::DisconnectNode(const CSubNet& subnet)
|
|
{
|
|
bool disconnected = false;
|
|
LOCK(cs_vNodes);
|
|
for (CNode* pnode : vNodes) {
|
|
if (subnet.Match(pnode->addr)) {
|
|
pnode->fDisconnect = true;
|
|
disconnected = true;
|
|
}
|
|
}
|
|
return disconnected;
|
|
}
|
|
|
|
bool CConnman::DisconnectNode(const CNetAddr& addr)
|
|
{
|
|
return DisconnectNode(CSubNet(addr));
|
|
}
|
|
|
|
bool CConnman::DisconnectNode(NodeId id)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for(CNode* pnode : vNodes) {
|
|
if (id == pnode->GetId()) {
|
|
pnode->fDisconnect = true;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void CConnman::RelayTransaction(const CTransaction& tx)
|
|
{
|
|
uint256 hash = tx.GetHash();
|
|
int nInv = MSG_TX;
|
|
if (CCoinJoin::GetDSTX(hash)) {
|
|
nInv = MSG_DSTX;
|
|
}
|
|
CInv inv(nInv, hash);
|
|
RelayInv(inv);
|
|
}
|
|
|
|
void CConnman::RelayInv(CInv &inv, const int minProtoVersion) {
|
|
LOCK(cs_vNodes);
|
|
for (const auto& pnode : vNodes) {
|
|
if (pnode->nVersion < minProtoVersion || !pnode->CanRelay())
|
|
continue;
|
|
pnode->PushInventory(inv);
|
|
}
|
|
}
|
|
|
|
void CConnman::RelayInvFiltered(CInv &inv, const CTransaction& relatedTx, const int minProtoVersion)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (const auto& pnode : vNodes) {
|
|
if (pnode->nVersion < minProtoVersion || !pnode->CanRelay() || !pnode->IsAddrRelayPeer()) {
|
|
continue;
|
|
}
|
|
{
|
|
LOCK(pnode->m_tx_relay->cs_filter);
|
|
if (!pnode->m_tx_relay->fRelayTxes) {
|
|
continue;
|
|
}
|
|
if (pnode->m_tx_relay->pfilter && !pnode->m_tx_relay->pfilter->IsRelevantAndUpdate(relatedTx)) {
|
|
continue;
|
|
}
|
|
}
|
|
pnode->PushInventory(inv);
|
|
}
|
|
}
|
|
|
|
void CConnman::RelayInvFiltered(CInv &inv, const uint256& relatedTxHash, const int minProtoVersion)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
for (const auto& pnode : vNodes) {
|
|
if (pnode->nVersion < minProtoVersion || !pnode->CanRelay() || !pnode->IsAddrRelayPeer()) {
|
|
continue;
|
|
}
|
|
{
|
|
LOCK(pnode->m_tx_relay->cs_filter);
|
|
if (!pnode->m_tx_relay->fRelayTxes) {
|
|
continue;
|
|
}
|
|
if (pnode->m_tx_relay->pfilter && !pnode->m_tx_relay->pfilter->contains(relatedTxHash)) {
|
|
continue;
|
|
}
|
|
}
|
|
pnode->PushInventory(inv);
|
|
}
|
|
}
|
|
|
|
void CConnman::RecordBytesRecv(uint64_t bytes)
|
|
{
|
|
LOCK(cs_totalBytesRecv);
|
|
nTotalBytesRecv += bytes;
|
|
statsClient.count("bandwidth.bytesReceived", bytes, 0.1f);
|
|
statsClient.gauge("bandwidth.totalBytesReceived", nTotalBytesRecv, 0.01f);
|
|
}
|
|
|
|
void CConnman::RecordBytesSent(uint64_t bytes)
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
nTotalBytesSent += bytes;
|
|
statsClient.count("bandwidth.bytesSent", bytes, 0.01f);
|
|
statsClient.gauge("bandwidth.totalBytesSent", nTotalBytesSent, 0.01f);
|
|
|
|
const auto now = GetTime<std::chrono::seconds>();
|
|
if (nMaxOutboundCycleStartTime + MAX_UPLOAD_TIMEFRAME < now)
|
|
{
|
|
// timeframe expired, reset cycle
|
|
nMaxOutboundCycleStartTime = now;
|
|
nMaxOutboundTotalBytesSentInCycle = 0;
|
|
}
|
|
|
|
nMaxOutboundTotalBytesSentInCycle += bytes;
|
|
}
|
|
|
|
uint64_t CConnman::GetMaxOutboundTarget()
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
return nMaxOutboundLimit;
|
|
}
|
|
|
|
std::chrono::seconds CConnman::GetMaxOutboundTimeframe()
|
|
{
|
|
return MAX_UPLOAD_TIMEFRAME;
|
|
}
|
|
|
|
std::chrono::seconds CConnman::GetMaxOutboundTimeLeftInCycle()
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
if (nMaxOutboundLimit == 0)
|
|
return 0s;
|
|
|
|
if (nMaxOutboundCycleStartTime.count() == 0)
|
|
return MAX_UPLOAD_TIMEFRAME;
|
|
|
|
const std::chrono::seconds cycleEndTime = nMaxOutboundCycleStartTime + MAX_UPLOAD_TIMEFRAME;
|
|
const auto now = GetTime<std::chrono::seconds>();
|
|
return (cycleEndTime < now) ? 0s : cycleEndTime - now;
|
|
}
|
|
|
|
bool CConnman::OutboundTargetReached(bool historicalBlockServingLimit)
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
if (nMaxOutboundLimit == 0)
|
|
return false;
|
|
|
|
if (historicalBlockServingLimit)
|
|
{
|
|
// keep a large enough buffer to at least relay each block once
|
|
const std::chrono::seconds timeLeftInCycle = GetMaxOutboundTimeLeftInCycle();
|
|
const uint64_t buffer = timeLeftInCycle / std::chrono::minutes{10} * MaxBlockSize(fDIP0001ActiveAtTip);
|
|
if (buffer >= nMaxOutboundLimit || nMaxOutboundTotalBytesSentInCycle >= nMaxOutboundLimit - buffer)
|
|
return true;
|
|
}
|
|
else if (nMaxOutboundTotalBytesSentInCycle >= nMaxOutboundLimit)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
uint64_t CConnman::GetOutboundTargetBytesLeft()
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
if (nMaxOutboundLimit == 0)
|
|
return 0;
|
|
|
|
return (nMaxOutboundTotalBytesSentInCycle >= nMaxOutboundLimit) ? 0 : nMaxOutboundLimit - nMaxOutboundTotalBytesSentInCycle;
|
|
}
|
|
|
|
uint64_t CConnman::GetTotalBytesRecv()
|
|
{
|
|
LOCK(cs_totalBytesRecv);
|
|
return nTotalBytesRecv;
|
|
}
|
|
|
|
uint64_t CConnman::GetTotalBytesSent()
|
|
{
|
|
LOCK(cs_totalBytesSent);
|
|
return nTotalBytesSent;
|
|
}
|
|
|
|
ServiceFlags CConnman::GetLocalServices() const
|
|
{
|
|
return nLocalServices;
|
|
}
|
|
|
|
unsigned int CConnman::GetReceiveFloodSize() const { return nReceiveFloodSize; }
|
|
|
|
CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, SOCKET hSocketIn, const CAddress& addrIn, uint64_t nKeyedNetGroupIn, uint64_t nLocalHostNonceIn, const CAddress& addrBindIn, const std::string& addrNameIn, bool fInboundIn, bool block_relay_only, bool inbound_onion)
|
|
: nTimeConnected(GetSystemTimeInSeconds()),
|
|
addr(addrIn),
|
|
addrBind(addrBindIn),
|
|
fInbound(fInboundIn),
|
|
nKeyedNetGroup(nKeyedNetGroupIn),
|
|
m_addr_known{block_relay_only ? nullptr : std::make_unique<CRollingBloomFilter>(5000, 0.001)},
|
|
id(idIn),
|
|
nLocalHostNonce(nLocalHostNonceIn),
|
|
nLocalServices(nLocalServicesIn),
|
|
m_inbound_onion(inbound_onion)
|
|
{
|
|
hSocket = hSocketIn;
|
|
addrName = addrNameIn == "" ? addr.ToStringIPPort() : addrNameIn;
|
|
hashContinue = uint256();
|
|
|
|
for (const std::string &msg : getAllNetMessageTypes())
|
|
mapRecvBytesPerMsgCmd[msg] = 0;
|
|
mapRecvBytesPerMsgCmd[NET_MESSAGE_COMMAND_OTHER] = 0;
|
|
|
|
if (fLogIPs) {
|
|
LogPrint(BCLog::NET, "Added connection to %s peer=%d\n", addrName, id);
|
|
} else {
|
|
LogPrint(BCLog::NET, "Added connection peer=%d\n", id);
|
|
}
|
|
|
|
m_deserializer = std::make_unique<V1TransportDeserializer>(V1TransportDeserializer(Params(), GetId(), SER_NETWORK, INIT_PROTO_VERSION));
|
|
m_serializer = std::make_unique<V1TransportSerializer>(V1TransportSerializer());
|
|
}
|
|
|
|
CNode::~CNode()
|
|
{
|
|
CloseSocket(hSocket);
|
|
}
|
|
|
|
bool CConnman::NodeFullyConnected(const CNode* pnode)
|
|
{
|
|
return pnode && pnode->fSuccessfullyConnected && !pnode->fDisconnect;
|
|
}
|
|
|
|
void CConnman::PushMessage(CNode* pnode, CSerializedNetMsg&& msg)
|
|
{
|
|
size_t nMessageSize = msg.data.size();
|
|
LogPrint(BCLog::NET, "sending %s (%d bytes) peer=%d\n", SanitizeString(msg.command), nMessageSize, pnode->GetId());
|
|
|
|
// make sure we use the appropriate network transport format
|
|
std::vector<unsigned char> serializedHeader;
|
|
pnode->m_serializer->prepareForTransport(msg, serializedHeader);
|
|
|
|
size_t nTotalSize = nMessageSize + serializedHeader.size();
|
|
statsClient.count("bandwidth.message." + SanitizeString(msg.command.c_str()) + ".bytesSent", nTotalSize, 1.0f);
|
|
statsClient.inc("message.sent." + SanitizeString(msg.command.c_str()), 1.0f);
|
|
|
|
size_t nBytesSent = 0;
|
|
{
|
|
LOCK(pnode->cs_vSend);
|
|
bool hasPendingData = !pnode->vSendMsg.empty();
|
|
|
|
//log total amount of bytes per command
|
|
pnode->mapSendBytesPerMsgCmd[msg.command] += nTotalSize;
|
|
pnode->nSendSize += nTotalSize;
|
|
|
|
if (pnode->nSendSize > nSendBufferMaxSize)
|
|
pnode->fPauseSend = true;
|
|
pnode->vSendMsg.push_back(std::move(serializedHeader));
|
|
if (nMessageSize)
|
|
pnode->vSendMsg.push_back(std::move(msg.data));
|
|
pnode->nSendMsgSize = pnode->vSendMsg.size();
|
|
|
|
{
|
|
LOCK(cs_mapNodesWithDataToSend);
|
|
// we're not holding cs_vNodes here, so there is a chance of this node being disconnected shortly before
|
|
// we get here. Whoever called PushMessage still has a ref to CNode*, but will later Release() it, so we
|
|
// might end up having an entry in mapNodesWithDataToSend that is not in vNodes anymore. We need to
|
|
// Add/Release refs when adding/erasing mapNodesWithDataToSend.
|
|
if (mapNodesWithDataToSend.emplace(pnode->GetId(), pnode).second) {
|
|
pnode->AddRef();
|
|
}
|
|
}
|
|
|
|
// wake up select() call in case there was no pending data before (so it was not selecting this socket for sending)
|
|
if (!hasPendingData && wakeupSelectNeeded)
|
|
WakeSelect();
|
|
}
|
|
if (nBytesSent)
|
|
RecordBytesSent(nBytesSent);
|
|
}
|
|
|
|
bool CConnman::ForNode(const CService& addr, std::function<bool(const CNode* pnode)> cond, std::function<bool(CNode* pnode)> func)
|
|
{
|
|
CNode* found = nullptr;
|
|
LOCK(cs_vNodes);
|
|
for (auto&& pnode : vNodes) {
|
|
if((CService)pnode->addr == addr) {
|
|
found = pnode;
|
|
break;
|
|
}
|
|
}
|
|
return found != nullptr && cond(found) && func(found);
|
|
}
|
|
|
|
bool CConnman::ForNode(NodeId id, std::function<bool(const CNode* pnode)> cond, std::function<bool(CNode* pnode)> func)
|
|
{
|
|
CNode* found = nullptr;
|
|
LOCK(cs_vNodes);
|
|
for (auto&& pnode : vNodes) {
|
|
if(pnode->GetId() == id) {
|
|
found = pnode;
|
|
break;
|
|
}
|
|
}
|
|
return found != nullptr && cond(found) && func(found);
|
|
}
|
|
|
|
bool CConnman::IsMasternodeOrDisconnectRequested(const CService& addr) {
|
|
return ForNode(addr, AllNodes, [](CNode* pnode){
|
|
return pnode->m_masternode_connection || pnode->fDisconnect;
|
|
});
|
|
}
|
|
|
|
int64_t CConnman::PoissonNextSendInbound(int64_t now, int average_interval_seconds)
|
|
{
|
|
if (m_next_send_inv_to_incoming < now) {
|
|
// If this function were called from multiple threads simultaneously
|
|
// it would possible that both update the next send variable, and return a different result to their caller.
|
|
// This is not possible in practice as only the net processing thread invokes this function.
|
|
m_next_send_inv_to_incoming = PoissonNextSend(now, average_interval_seconds);
|
|
}
|
|
return m_next_send_inv_to_incoming;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
std::vector<CNode*> CConnman::CopyNodeVector(std::function<bool(const CNode* pnode)> cond)
|
|
{
|
|
std::vector<CNode*> vecNodesCopy;
|
|
LOCK(cs_vNodes);
|
|
vecNodesCopy.reserve(vNodes.size());
|
|
for(size_t i = 0; i < vNodes.size(); ++i) {
|
|
CNode* pnode = vNodes[i];
|
|
if (!cond(pnode))
|
|
continue;
|
|
pnode->AddRef();
|
|
vecNodesCopy.push_back(pnode);
|
|
}
|
|
return vecNodesCopy;
|
|
}
|
|
|
|
std::vector<CNode*> CConnman::CopyNodeVector()
|
|
{
|
|
return CopyNodeVector(AllNodes);
|
|
}
|
|
|
|
void CConnman::ReleaseNodeVector(const std::vector<CNode*>& vecNodes)
|
|
{
|
|
for(size_t i = 0; i < vecNodes.size(); ++i) {
|
|
CNode* pnode = vecNodes[i];
|
|
pnode->Release();
|
|
}
|
|
}
|
|
|
|
CSipHasher CConnman::GetDeterministicRandomizer(uint64_t id) const
|
|
{
|
|
return CSipHasher(nSeed0, nSeed1).Write(id);
|
|
}
|
|
|
|
uint64_t CConnman::CalculateKeyedNetGroup(const CAddress& ad) const
|
|
{
|
|
std::vector<unsigned char> vchNetGroup(ad.GetGroup(addrman.m_asmap));
|
|
|
|
return GetDeterministicRandomizer(RANDOMIZER_ID_NETGROUP).Write(vchNetGroup.data(), vchNetGroup.size()).Finalize();
|
|
}
|
|
|
|
void CConnman::RegisterEvents(CNode *pnode)
|
|
{
|
|
#ifdef USE_KQUEUE
|
|
if (socketEventsMode != SOCKETEVENTS_KQUEUE) {
|
|
return;
|
|
}
|
|
|
|
LOCK(pnode->cs_hSocket);
|
|
assert(pnode->hSocket != INVALID_SOCKET);
|
|
|
|
struct kevent events[2];
|
|
EV_SET(&events[0], pnode->hSocket, EVFILT_READ, EV_ADD, 0, 0, nullptr);
|
|
EV_SET(&events[1], pnode->hSocket, EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, nullptr);
|
|
|
|
int r = kevent(kqueuefd, events, 2, nullptr, 0, nullptr);
|
|
if (r != 0) {
|
|
LogPrint(BCLog::NET, "%s -- kevent(%d, %d, %d, ...) failed. error: %s\n", __func__,
|
|
kqueuefd, EV_ADD, pnode->hSocket, NetworkErrorString(WSAGetLastError()));
|
|
}
|
|
#endif
|
|
#ifdef USE_EPOLL
|
|
if (socketEventsMode != SOCKETEVENTS_EPOLL) {
|
|
return;
|
|
}
|
|
|
|
LOCK(pnode->cs_hSocket);
|
|
assert(pnode->hSocket != INVALID_SOCKET);
|
|
|
|
epoll_event e;
|
|
// We're using edge-triggered mode, so it's important that we drain sockets even if no signals come in
|
|
e.events = EPOLLIN | EPOLLOUT | EPOLLET | EPOLLERR | EPOLLHUP;
|
|
e.data.fd = pnode->hSocket;
|
|
|
|
int r = epoll_ctl(epollfd, EPOLL_CTL_ADD, pnode->hSocket, &e);
|
|
if (r != 0) {
|
|
LogPrint(BCLog::NET, "%s -- epoll_ctl(%d, %d, %d, ...) failed. error: %s\n", __func__,
|
|
epollfd, EPOLL_CTL_ADD, pnode->hSocket, NetworkErrorString(WSAGetLastError()));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void CConnman::UnregisterEvents(CNode *pnode)
|
|
{
|
|
#ifdef USE_KQUEUE
|
|
if (socketEventsMode != SOCKETEVENTS_KQUEUE) {
|
|
return;
|
|
}
|
|
|
|
LOCK(pnode->cs_hSocket);
|
|
if (pnode->hSocket == INVALID_SOCKET) {
|
|
return;
|
|
}
|
|
|
|
struct kevent events[2];
|
|
EV_SET(&events[0], pnode->hSocket, EVFILT_READ, EV_DELETE, 0, 0, nullptr);
|
|
EV_SET(&events[1], pnode->hSocket, EVFILT_WRITE, EV_DELETE, 0, 0, nullptr);
|
|
|
|
int r = kevent(kqueuefd, events, 2, nullptr, 0, nullptr);
|
|
if (r != 0) {
|
|
LogPrint(BCLog::NET, "%s -- kevent(%d, %d, %d, ...) failed. error: %s\n", __func__,
|
|
kqueuefd, EV_DELETE, pnode->hSocket, NetworkErrorString(WSAGetLastError()));
|
|
}
|
|
#endif
|
|
#ifdef USE_EPOLL
|
|
if (socketEventsMode != SOCKETEVENTS_EPOLL) {
|
|
return;
|
|
}
|
|
|
|
LOCK(pnode->cs_hSocket);
|
|
if (pnode->hSocket == INVALID_SOCKET) {
|
|
return;
|
|
}
|
|
|
|
int r = epoll_ctl(epollfd, EPOLL_CTL_DEL, pnode->hSocket, nullptr);
|
|
if (r != 0) {
|
|
LogPrint(BCLog::NET, "%s -- epoll_ctl(%d, %d, %d, ...) failed. error: %s\n", __func__,
|
|
epollfd, EPOLL_CTL_DEL, pnode->hSocket, NetworkErrorString(WSAGetLastError()));
|
|
}
|
|
#endif
|
|
}
|