diff options
Diffstat (limited to 'src/net.cpp')
| -rw-r--r-- | src/net.cpp | 189 |
1 files changed, 138 insertions, 51 deletions
diff --git a/src/net.cpp b/src/net.cpp index a0f66d06d0..86e5225839 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -1,5 +1,5 @@ // Copyright (c) 2009-2010 Satoshi Nakamoto -// Copyright (c) 2009-2018 The Bitcoin Core developers +// Copyright (c) 2009-2019 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -26,6 +26,10 @@ #include <fcntl.h> #endif +#ifdef USE_POLL +#include <poll.h> +#endif + #ifdef USE_UPNP #include <miniupnpc/miniupnpc.h> #include <miniupnpc/miniwget.h> @@ -33,6 +37,7 @@ #include <miniupnpc/upnperrors.h> #endif +#include <unordered_map> #include <math.h> @@ -71,7 +76,11 @@ enum BindFlags { BF_WHITELIST = (1U << 2), }; -const static std::string NET_MESSAGE_COMMAND_OTHER = "*other*"; +// The set of sockets cannot be modified while waiting +// The sleep time needs to be small to avoid new sockets stalling +static const uint64_t SELECT_TIMEOUT_MILLISECONDS = 50; + +const std::string NET_MESSAGE_COMMAND_OTHER = "*other*"; static const uint64_t RANDOMIZER_ID_NETGROUP = 0x6c0edd8036ef4036ULL; // SHA256("netgroup")[0:8] static const uint64_t RANDOMIZER_ID_LOCALHOSTNONCE = 0xd93e69e2bbfa5735ULL; // SHA256("localhostnonce")[0:8] @@ -776,7 +785,6 @@ bool CNode::ReceiveMsgBytes(const char *pch, unsigned int nBytes, bool& complete nBytes -= handled; if (msg.complete()) { - //store received bytes per message command //to prevent a memory DOS, only allow valid commands mapMsgCmdSize::iterator i = mapRecvBytesPerMsgCmd.find(msg.hdr.pchCommand); @@ -1256,28 +1264,10 @@ void CConnman::InactivityCheck(CNode *pnode) } } -void CConnman::SocketHandler() +bool CConnman::GenerateSelectSet(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set) { - // - // Find which sockets have data to receive - // - struct timeval timeout; - timeout.tv_sec = 0; - timeout.tv_usec = 50000; // frequency to poll pnode->vSend - - fd_set fdsetRecv; - fd_set fdsetSend; - fd_set fdsetError; - FD_ZERO(&fdsetRecv); - FD_ZERO(&fdsetSend); - FD_ZERO(&fdsetError); - SOCKET hSocketMax = 0; - bool have_fds = false; - for (const ListenSocket& hListenSocket : vhListenSocket) { - FD_SET(hListenSocket.socket, &fdsetRecv); - hSocketMax = std::max(hSocketMax, hListenSocket.socket); - have_fds = true; + recv_set.insert(hListenSocket.socket); } { @@ -1306,46 +1296,151 @@ void CConnman::SocketHandler() if (pnode->hSocket == INVALID_SOCKET) continue; - FD_SET(pnode->hSocket, &fdsetError); - hSocketMax = std::max(hSocketMax, pnode->hSocket); - have_fds = true; - + error_set.insert(pnode->hSocket); if (select_send) { - FD_SET(pnode->hSocket, &fdsetSend); + send_set.insert(pnode->hSocket); continue; } if (select_recv) { - FD_SET(pnode->hSocket, &fdsetRecv); + recv_set.insert(pnode->hSocket); } } } - int nSelect = select(have_fds ? hSocketMax + 1 : 0, - &fdsetRecv, &fdsetSend, &fdsetError, &timeout); + return !recv_set.empty() || !send_set.empty() || !error_set.empty(); +} + +#ifdef USE_POLL +void CConnman::SocketEvents(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set) +{ + 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; + } + + 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)); + } + + if (poll(vpollfds.data(), vpollfds.size(), SELECT_TIMEOUT_MILLISECONDS) < 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); + } +} +#else +void CConnman::SocketEvents(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set) +{ + 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 = 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); + } + + int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout); + if (interruptNet) return; if (nSelect == SOCKET_ERROR) { - if (have_fds) - { - int nErr = WSAGetLastError(); - LogPrintf("socket select error %s\n", NetworkErrorString(nErr)); - for (unsigned int i = 0; i <= hSocketMax; i++) - FD_SET(i, &fdsetRecv); - } + 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(timeout.tv_usec/1000))) + 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); + } + } +} +#endif + +void CConnman::SocketHandler() +{ + std::set<SOCKET> recv_set, send_set, error_set; + SocketEvents(recv_set, send_set, error_set); + + if (interruptNet) return; + // // Accept new connections // for (const ListenSocket& hListenSocket : vhListenSocket) { - if (hListenSocket.socket != INVALID_SOCKET && FD_ISSET(hListenSocket.socket, &fdsetRecv)) + if (hListenSocket.socket != INVALID_SOCKET && recv_set.count(hListenSocket.socket) > 0) { AcceptConnection(hListenSocket); } @@ -1376,9 +1471,9 @@ void CConnman::SocketHandler() LOCK(pnode->cs_hSocket); if (pnode->hSocket == INVALID_SOCKET) continue; - recvSet = FD_ISSET(pnode->hSocket, &fdsetRecv); - sendSet = FD_ISSET(pnode->hSocket, &fdsetSend); - errorSet = FD_ISSET(pnode->hSocket, &fdsetError); + recvSet = recv_set.count(pnode->hSocket) > 0; + sendSet = send_set.count(pnode->hSocket) > 0; + errorSet = error_set.count(pnode->hSocket) > 0; } if (recvSet || errorSet) { @@ -2219,14 +2314,6 @@ void CConnman::SetNetworkActive(bool active) CConnman::CConnman(uint64_t nSeed0In, uint64_t nSeed1In) : nSeed0(nSeed0In), nSeed1(nSeed1In) { - fNetworkActive = true; - setBannedIsDirty = false; - fAddressesInitialized = false; - nLastNodeId = 0; - nPrevNodeCount = 0; - nSendBufferMaxSize = 0; - nReceiveFloodSize = 0; - flagInterruptMsgProc = false; SetTryNewOutboundPeer(false); Options connOptions; |