diff options
Diffstat (limited to 'src/net.cpp')
| -rw-r--r-- | src/net.cpp | 185 |
1 files changed, 106 insertions, 79 deletions
diff --git a/src/net.cpp b/src/net.cpp index 76bf7effa4..81176785a2 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -20,6 +20,7 @@ #include <protocol.h> #include <random.h> #include <scheduler.h> +#include <util/sock.h> #include <util/strencodings.h> #include <util/translation.h> @@ -429,24 +430,26 @@ CNode* CConnman::ConnectNode(CAddress addrConnect, const char *pszDest, bool fCo // Connect bool connected = false; - SOCKET hSocket = INVALID_SOCKET; + std::unique_ptr<Sock> sock; proxyType proxy; if (addrConnect.IsValid()) { bool proxyConnectionFailed = false; if (GetProxy(addrConnect.GetNetwork(), proxy)) { - hSocket = CreateSocket(proxy.proxy); - if (hSocket == INVALID_SOCKET) { + sock = CreateSock(proxy.proxy); + if (!sock) { return nullptr; } - connected = ConnectThroughProxy(proxy, addrConnect.ToStringIP(), addrConnect.GetPort(), hSocket, nConnectTimeout, proxyConnectionFailed); + connected = ConnectThroughProxy(proxy, addrConnect.ToStringIP(), addrConnect.GetPort(), + *sock, nConnectTimeout, proxyConnectionFailed); } else { // no proxy needed (none set for target network) - hSocket = CreateSocket(addrConnect); - if (hSocket == INVALID_SOCKET) { + sock = CreateSock(addrConnect); + if (!sock) { return nullptr; } - connected = ConnectSocketDirectly(addrConnect, hSocket, nConnectTimeout, conn_type == ConnectionType::MANUAL); + connected = ConnectSocketDirectly(addrConnect, sock->Get(), nConnectTimeout, + conn_type == ConnectionType::MANUAL); } if (!proxyConnectionFailed) { // If a connection to the node was attempted, and failure (if any) is not caused by a problem connecting to @@ -454,26 +457,26 @@ CNode* CConnman::ConnectNode(CAddress addrConnect, const char *pszDest, bool fCo addrman.Attempt(addrConnect, fCountFailure); } } else if (pszDest && GetNameProxy(proxy)) { - hSocket = CreateSocket(proxy.proxy); - if (hSocket == INVALID_SOCKET) { + sock = CreateSock(proxy.proxy); + if (!sock) { return nullptr; } std::string host; int port = default_port; SplitHostPort(std::string(pszDest), port, host); bool proxyConnectionFailed; - connected = ConnectThroughProxy(proxy, host, port, hSocket, nConnectTimeout, proxyConnectionFailed); + connected = ConnectThroughProxy(proxy, host, port, *sock, nConnectTimeout, + proxyConnectionFailed); } if (!connected) { - CloseSocket(hSocket); return nullptr; } // Add node NodeId id = GetNewNodeId(); uint64_t nonce = GetDeterministicRandomizer(RANDOMIZER_ID_LOCALHOSTNONCE).Write(id).Finalize(); - CAddress addr_bind = GetBindAddress(hSocket); - CNode* pnode = new CNode(id, nLocalServices, hSocket, addrConnect, CalculateKeyedNetGroup(addrConnect), nonce, addr_bind, pszDest ? pszDest : "", conn_type); + CAddress addr_bind = GetBindAddress(sock->Get()); + CNode* pnode = new CNode(id, nLocalServices, sock->Release(), addrConnect, CalculateKeyedNetGroup(addrConnect), nonce, addr_bind, pszDest ? pszDest : "", conn_type, /* inbound_onion */ false); pnode->AddRef(); // We're making a new connection, harvest entropy from the time (and our peer count) @@ -598,21 +601,8 @@ void CNode::copyStats(CNodeStats &stats, const std::vector<bool> &m_asmap) stats.minFeeFilter = 0; } - // 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. - std::chrono::microseconds ping_wait{0}; - if ((0 != nPingNonceSent) && (0 != m_ping_start.load().count())) { - ping_wait = GetTime<std::chrono::microseconds>() - m_ping_start.load(); - } - - // Raw ping time is in microseconds, but show it to user as whole seconds (Bitcoin users should be well used to small numbers with many decimal places by now :) - stats.m_ping_usec = nPingUsecTime; - stats.m_min_ping_usec = nMinPingUsecTime; - stats.m_ping_wait_usec = count_microseconds(ping_wait); + stats.m_ping_usec = m_last_ping_time; + stats.m_min_ping_usec = m_min_ping_time; // Leave string empty if addrLocal invalid (not filled in yet) CService addrLocalUnlocked = GetAddrLocal(); @@ -834,7 +824,7 @@ size_t CConnman::SocketSendData(CNode& node) const static bool ReverseCompareNodeMinPingTime(const NodeEvictionCandidate &a, const NodeEvictionCandidate &b) { - return a.nMinPingUsecTime > b.nMinPingUsecTime; + return a.m_min_ping_time > b.m_min_ping_time; } static bool ReverseCompareNodeTimeConnected(const NodeEvictionCandidate &a, const NodeEvictionCandidate &b) @@ -989,7 +979,7 @@ bool CConnman::AttemptToEvictConnection() 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, + NodeEvictionCandidate candidate = {node->GetId(), node->nTimeConnected, node->m_min_ping_time, node->nLastBlockTime, node->nLastTXTime, HasAllDesirableServiceFlags(node->nServices), peer_relay_txes, peer_filter_not_null, node->nKeyedNetGroup, @@ -1218,18 +1208,17 @@ void CConnman::NotifyNumConnectionsChanged() } } +bool CConnman::RunInactivityChecks(const CNode& node) const +{ + return GetSystemTimeInSeconds() > node.nTimeConnected + m_peer_connect_timeout; +} + bool CConnman::InactivityCheck(const CNode& node) const { // Use non-mockable system time (otherwise these timers will pop when we // use setmocktime in the tests). int64_t now = GetSystemTimeInSeconds(); - if (now <= node.nTimeConnected + m_peer_connect_timeout) { - // Only run inactivity checks if the peer has been connected longer - // than m_peer_connect_timeout. - return false; - } - if (node.nLastRecv == 0 || node.nLastSend == 0) { LogPrint(BCLog::NET, "socket no message in first %i seconds, %d %d peer=%d\n", m_peer_connect_timeout, node.nLastRecv != 0, node.nLastSend != 0, node.GetId()); return true; @@ -1245,14 +1234,6 @@ bool CConnman::InactivityCheck(const CNode& node) const return true; } - if (node.nPingNonceSent && node.m_ping_start.load() + std::chrono::seconds{TIMEOUT_INTERVAL} < GetTime<std::chrono::microseconds>()) { - // We use mockable time for ping timeouts. This means that setmocktime - // may cause pings to time out for peers that have been connected for - // longer than m_peer_connect_timeout. - LogPrint(BCLog::NET, "ping timeout: %fs peer=%d\n", 0.000001 * count_microseconds(GetTime<std::chrono::microseconds>() - node.m_ping_start.load()), node.GetId()); - return true; - } - if (!node.fSuccessfullyConnected) { LogPrint(BCLog::NET, "version handshake timeout peer=%d\n", node.GetId()); return true; @@ -1534,7 +1515,7 @@ void CConnman::SocketHandler() if (bytes_sent) RecordBytesSent(bytes_sent); } - if (InactivityCheck(*pnode)) pnode->fDisconnect = true; + if (RunInactivityChecks(*pnode) && InactivityCheck(*pnode)) pnode->fDisconnect = true; } { LOCK(cs_vNodes); @@ -1769,11 +1750,19 @@ void CConnman::ThreadOpenConnections(const std::vector<std::string> connect) } // Initiate network connections - int64_t nStart = GetTime(); + auto start = GetTime<std::chrono::seconds>(); // Minimum time before next feeler connection (in microseconds). - int64_t nNextFeeler = PoissonNextSend(nStart*1000*1000, FEELER_INTERVAL); - int64_t nNextExtraBlockRelay = PoissonNextSend(nStart*1000*1000, EXTRA_BLOCK_RELAY_ONLY_PEER_INTERVAL); + + int64_t nNextFeeler = PoissonNextSend(count_microseconds(start), FEELER_INTERVAL); + int64_t nNextExtraBlockRelay = PoissonNextSend(count_microseconds(start), EXTRA_BLOCK_RELAY_ONLY_PEER_INTERVAL); + const bool dnsseed = gArgs.GetBoolArg("-dnsseed", DEFAULT_DNSSEED); + bool add_fixed_seeds = gArgs.GetBoolArg("-fixedseeds", DEFAULT_FIXEDSEEDS); + + if (!add_fixed_seeds) { + LogPrintf("Fixed seeds are disabled\n"); + } + while (!interruptNet) { ProcessAddrFetch(); @@ -1785,18 +1774,32 @@ void CConnman::ThreadOpenConnections(const std::vector<std::string> connect) 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"); + if (add_fixed_seeds && addrman.size() == 0) { + // When the node starts with an empty peers.dat, there are a few other sources of peers before + // we fallback on to fixed seeds: -dnsseed, -seednode, -addnode + // If none of those are available, we fallback on to fixed seeds immediately, else we allow + // 60 seconds for any of those sources to populate addrman. + bool add_fixed_seeds_now = false; + // It is cheapest to check if enough time has passed first. + if (GetTime<std::chrono::seconds>() > start + std::chrono::minutes{1}) { + add_fixed_seeds_now = true; + LogPrintf("Adding fixed seeds as 60 seconds have passed and addrman is empty\n"); + } + + // Checking !dnsseed is cheaper before locking 2 mutexes. + if (!add_fixed_seeds_now && !dnsseed) { + LOCK2(m_addr_fetches_mutex, cs_vAddedNodes); + if (m_addr_fetches.empty() && vAddedNodes.empty()) { + add_fixed_seeds_now = true; + LogPrintf("Adding fixed seeds as -dnsseed=0, -addnode is not provided and all -seednode(s) attempted\n"); + } + } + + if (add_fixed_seeds_now) { CNetAddr local; local.SetInternal("fixedseeds"); addrman.Add(convertSeed6(Params().FixedSeeds()), local); - done = true; + add_fixed_seeds = false; } } @@ -2188,9 +2191,8 @@ bool CConnman::BindListenPort(const CService& addrBind, bilingual_str& strError, return false; } - SOCKET hListenSocket = CreateSocket(addrBind); - if (hListenSocket == INVALID_SOCKET) - { + 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; @@ -2198,21 +2200,21 @@ bool CConnman::BindListenPort(const CService& addrBind, bilingual_str& strError, // Allow binding if the port is still in TIME_WAIT state after // the program was closed and restarted. - setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (sockopt_arg_type)&nOne, sizeof(int)); + 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(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (sockopt_arg_type)&nOne, sizeof(int)); + setsockopt(sock->Get(), IPPROTO_IPV6, IPV6_V6ONLY, (sockopt_arg_type)&nOne, sizeof(int)); #endif #ifdef WIN32 int nProtLevel = PROTECTION_LEVEL_UNRESTRICTED; - setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL, (const char*)&nProtLevel, sizeof(int)); + setsockopt(sock->Get(), IPPROTO_IPV6, IPV6_PROTECTION_LEVEL, (const char*)&nProtLevel, sizeof(int)); #endif } - if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR) + if (::bind(sock->Get(), (struct sockaddr*)&sockaddr, len) == SOCKET_ERROR) { int nErr = WSAGetLastError(); if (nErr == WSAEADDRINUSE) @@ -2220,21 +2222,19 @@ bool CConnman::BindListenPort(const CService& addrBind, bilingual_str& strError, else strError = strprintf(_("Unable to bind to %s on this computer (bind returned error %s)"), addrBind.ToString(), NetworkErrorString(nErr)); LogPrintf("%s\n", strError.original); - CloseSocket(hListenSocket); return false; } LogPrintf("Bound to %s\n", addrBind.ToString()); // Listen for incoming connections - if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR) + 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); - CloseSocket(hListenSocket); return false; } - vhListenSocket.push_back(ListenSocket(hListenSocket, permissions)); + vhListenSocket.push_back(ListenSocket(sock->Release(), permissions)); return true; } @@ -2434,7 +2434,7 @@ bool CConnman::Start(CScheduler& scheduler, const Options& connOptions) // 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)) + if (!gArgs.GetBoolArg("-dnsseed", DEFAULT_DNSSEED)) LogPrintf("DNS seeding disabled\n"); else threadDNSAddressSeed = std::thread(&TraceThread<std::function<void()> >, "dnsseed", std::function<void()>(std::bind(&CConnman::ThreadDNSAddressSeed, this))); @@ -2833,12 +2833,12 @@ CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, SOCKET hSocketIn, const : nTimeConnected(GetSystemTimeInSeconds()), addr(addrIn), addrBind(addrBindIn), + m_inbound_onion(inbound_onion), nKeyedNetGroup(nKeyedNetGroupIn), id(idIn), nLocalHostNonce(nLocalHostNonceIn), m_conn_type(conn_type_in), - nLocalServices(nLocalServicesIn), - m_inbound_onion(inbound_onion) + nLocalServices(nLocalServicesIn) { if (inbound_onion) assert(conn_type_in == ConnectionType::INBOUND); hSocket = hSocketIn; @@ -2879,6 +2879,9 @@ 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.m_type), nMessageSize, pnode->GetId()); + if (gArgs.GetBoolArg("-capturemessages", false)) { + CaptureMessage(pnode->addr, msg.m_type, msg.data, /* incoming */ false); + } // make sure we use the appropriate network transport format std::vector<unsigned char> serializedHeader; @@ -2894,18 +2897,14 @@ void CConnman::PushMessage(CNode* pnode, CSerializedNetMsg&& msg) pnode->mapSendBytesPerMsgCmd[msg.m_type] += nTotalSize; pnode->nSendSize += nTotalSize; - if (pnode->nSendSize > nSendBufferMaxSize) - pnode->fPauseSend = true; + if (pnode->nSendSize > nSendBufferMaxSize) pnode->fPauseSend = true; pnode->vSendMsg.push_back(std::move(serializedHeader)); - if (nMessageSize) - pnode->vSendMsg.push_back(std::move(msg.data)); + if (nMessageSize) pnode->vSendMsg.push_back(std::move(msg.data)); // If write queue empty, attempt "optimistic write" - if (optimisticSend == true) - nBytesSent = SocketSendData(*pnode); + if (optimisticSend) nBytesSent = SocketSendData(*pnode); } - if (nBytesSent) - RecordBytesSent(nBytesSent); + if (nBytesSent) RecordBytesSent(nBytesSent); } bool CConnman::ForNode(NodeId id, std::function<bool(CNode* pnode)> func) @@ -2948,3 +2947,31 @@ uint64_t CConnman::CalculateKeyedNetGroup(const CAddress& ad) const return GetDeterministicRandomizer(RANDOMIZER_ID_NETGROUP).Write(vchNetGroup.data(), vchNetGroup.size()).Finalize(); } + +void CaptureMessage(const CAddress& addr, const std::string& msg_type, const Span<const unsigned char>& data, bool is_incoming) +{ + // Note: This function captures the message at the time of processing, + // not at socket receive/send time. + // This ensures that the messages are always in order from an application + // layer (processing) perspective. + auto now = GetTime<std::chrono::microseconds>(); + + // Windows folder names can not include a colon + std::string clean_addr = addr.ToString(); + std::replace(clean_addr.begin(), clean_addr.end(), ':', '_'); + + fs::path base_path = GetDataDir() / "message_capture" / clean_addr; + fs::create_directories(base_path); + + fs::path path = base_path / (is_incoming ? "msgs_recv.dat" : "msgs_sent.dat"); + CAutoFile f(fsbridge::fopen(path, "ab"), SER_DISK, CLIENT_VERSION); + + ser_writedata64(f, now.count()); + f.write(msg_type.data(), msg_type.length()); + for (auto i = msg_type.length(); i < CMessageHeader::COMMAND_SIZE; ++i) { + f << '\0'; + } + uint32_t size = data.size(); + ser_writedata32(f, size); + f.write((const char*)data.data(), data.size()); +} |