diff options
| -rw-r--r-- | src/net.cpp | 178 | ||||
| -rw-r--r-- | src/net.h | 38 |
2 files changed, 36 insertions, 180 deletions
diff --git a/src/net.cpp b/src/net.cpp index 676037a357..02fb5bdfb6 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -1395,13 +1395,12 @@ bool CConnman::InactivityCheck(const CNode& node) const return false; } -bool CConnman::GenerateSelectSet(const std::vector<CNode*>& nodes, - std::set<SOCKET>& recv_set, - std::set<SOCKET>& send_set, - std::set<SOCKET>& error_set) +Sock::EventsPerSock CConnman::GenerateWaitSockets(Span<CNode* const> nodes) { + Sock::EventsPerSock events_per_sock; + for (const ListenSocket& hListenSocket : vhListenSocket) { - recv_set.insert(hListenSocket.sock->Get()); + events_per_sock.emplace(hListenSocket.sock, Sock::Events{Sock::RECV}); } for (CNode* pnode : nodes) { @@ -1428,172 +1427,49 @@ bool CConnman::GenerateSelectSet(const std::vector<CNode*>& nodes, continue; } - error_set.insert(pnode->m_sock->Get()); + Sock::Event requested{0}; if (select_send) { - send_set.insert(pnode->m_sock->Get()); - continue; - } - if (select_recv) { - recv_set.insert(pnode->m_sock->Get()); - } - } - - return !recv_set.empty() || !send_set.empty() || !error_set.empty(); -} - -#ifdef USE_POLL -void CConnman::SocketEvents(const std::vector<CNode*>& nodes, - 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(nodes, 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(const std::vector<CNode*>& nodes, - 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(nodes, 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) - { - 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); + requested = Sock::SEND; + } else if (select_recv) { + requested = Sock::RECV; } - } - for (SOCKET hSocket : send_select_set) { - if (FD_ISSET(hSocket, &fdsetSend)) { - send_set.insert(hSocket); - } + events_per_sock.emplace(pnode->m_sock, Sock::Events{requested}); } - for (SOCKET hSocket : error_select_set) { - if (FD_ISSET(hSocket, &fdsetError)) { - error_set.insert(hSocket); - } - } + return events_per_sock; } -#endif void CConnman::SocketHandler() { AssertLockNotHeld(m_total_bytes_sent_mutex); - std::set<SOCKET> recv_set; - std::set<SOCKET> send_set; - std::set<SOCKET> error_set; + Sock::EventsPerSock events_per_sock; { const NodesSnapshot snap{*this, /*shuffle=*/false}; + const auto timeout = std::chrono::milliseconds(SELECT_TIMEOUT_MILLISECONDS); + // Check for the readiness of the already connected sockets and the // listening sockets in one call ("readiness" as in poll(2) or // select(2)). If none are ready, wait for a short while and return // empty sets. - SocketEvents(snap.Nodes(), recv_set, send_set, error_set); + events_per_sock = GenerateWaitSockets(snap.Nodes()); + if (events_per_sock.empty() || !events_per_sock.begin()->first->WaitMany(timeout, events_per_sock)) { + interruptNet.sleep_for(timeout); + } // Service (send/receive) each of the already connected nodes. - SocketHandlerConnected(snap.Nodes(), recv_set, send_set, error_set); + SocketHandlerConnected(snap.Nodes(), events_per_sock); } // Accept new connections from listening sockets. - SocketHandlerListening(recv_set); + SocketHandlerListening(events_per_sock); } void CConnman::SocketHandlerConnected(const std::vector<CNode*>& nodes, - const std::set<SOCKET>& recv_set, - const std::set<SOCKET>& send_set, - const std::set<SOCKET>& error_set) + const Sock::EventsPerSock& events_per_sock) { AssertLockNotHeld(m_total_bytes_sent_mutex); @@ -1612,9 +1488,12 @@ void CConnman::SocketHandlerConnected(const std::vector<CNode*>& nodes, if (!pnode->m_sock) { continue; } - recvSet = recv_set.count(pnode->m_sock->Get()) > 0; - sendSet = send_set.count(pnode->m_sock->Get()) > 0; - errorSet = error_set.count(pnode->m_sock->Get()) > 0; + const auto it = events_per_sock.find(pnode->m_sock); + if (it != events_per_sock.end()) { + recvSet = it->second.occurred & Sock::RECV; + sendSet = it->second.occurred & Sock::SEND; + errorSet = it->second.occurred & Sock::ERR; + } } if (recvSet || errorSet) { @@ -1684,13 +1563,14 @@ void CConnman::SocketHandlerConnected(const std::vector<CNode*>& nodes, } } -void CConnman::SocketHandlerListening(const std::set<SOCKET>& recv_set) +void CConnman::SocketHandlerListening(const Sock::EventsPerSock& events_per_sock) { for (const ListenSocket& listen_socket : vhListenSocket) { if (interruptNet) { return; } - if (recv_set.count(listen_socket.sock->Get()) > 0) { + const auto it = events_per_sock.find(listen_socket.sock); + if (it != events_per_sock.end() && it->second.occurred & Sock::RECV) { AcceptConnection(listen_socket); } } @@ -980,28 +980,9 @@ private: /** * Generate a collection of sockets to check for IO readiness. * @param[in] nodes Select from these nodes' sockets. - * @param[out] recv_set Sockets to check for read readiness. - * @param[out] send_set Sockets to check for write readiness. - * @param[out] error_set Sockets to check for errors. - * @return true if at least one socket is to be checked (the returned set is not empty) + * @return sockets to check for readiness */ - bool GenerateSelectSet(const std::vector<CNode*>& nodes, - std::set<SOCKET>& recv_set, - std::set<SOCKET>& send_set, - std::set<SOCKET>& error_set); - - /** - * Check which sockets are ready for IO. - * @param[in] nodes Select from these nodes' sockets. - * @param[out] recv_set Sockets which are ready for read. - * @param[out] send_set Sockets which are ready for write. - * @param[out] error_set Sockets which have errors. - * This calls `GenerateSelectSet()` to gather a list of sockets to check. - */ - void SocketEvents(const std::vector<CNode*>& nodes, - std::set<SOCKET>& recv_set, - std::set<SOCKET>& send_set, - std::set<SOCKET>& error_set); + Sock::EventsPerSock GenerateWaitSockets(Span<CNode* const> nodes); /** * Check connected and listening sockets for IO readiness and process them accordingly. @@ -1010,23 +991,18 @@ private: /** * Do the read/write for connected sockets that are ready for IO. - * @param[in] nodes Nodes to process. The socket of each node is checked against - * `recv_set`, `send_set` and `error_set`. - * @param[in] recv_set Sockets that are ready for read. - * @param[in] send_set Sockets that are ready for send. - * @param[in] error_set Sockets that have an exceptional condition (error). + * @param[in] nodes Nodes to process. The socket of each node is checked against `what`. + * @param[in] events_per_sock Sockets that are ready for IO. */ void SocketHandlerConnected(const std::vector<CNode*>& nodes, - const std::set<SOCKET>& recv_set, - const std::set<SOCKET>& send_set, - const std::set<SOCKET>& error_set) + const Sock::EventsPerSock& events_per_sock) EXCLUSIVE_LOCKS_REQUIRED(!m_total_bytes_sent_mutex, !mutexMsgProc); /** * Accept incoming connections, one from each read-ready listening socket. - * @param[in] recv_set Sockets that are ready for read. + * @param[in] events_per_sock Sockets that are ready for IO. */ - void SocketHandlerListening(const std::set<SOCKET>& recv_set); + void SocketHandlerListening(const Sock::EventsPerSock& events_per_sock); void ThreadSocketHandler() EXCLUSIVE_LOCKS_REQUIRED(!m_total_bytes_sent_mutex, !mutexMsgProc); void ThreadDNSAddressSeed() EXCLUSIVE_LOCKS_REQUIRED(!m_addr_fetches_mutex, !m_nodes_mutex); |