diff options
Diffstat (limited to 'src/net.h')
| -rw-r--r-- | src/net.h | 120 |
1 files changed, 102 insertions, 18 deletions
@@ -70,7 +70,7 @@ static const bool DEFAULT_LISTEN = true; /** The maximum number of peer connections to maintain. */ static const unsigned int DEFAULT_MAX_PEER_CONNECTIONS = 125; /** The default for -maxuploadtarget. 0 = Unlimited */ -static constexpr uint64_t DEFAULT_MAX_UPLOAD_TARGET = 0; +static const std::string DEFAULT_MAX_UPLOAD_TARGET{"0M"}; /** Default for blocks only*/ static const bool DEFAULT_BLOCKSONLY = false; /** -peertimeout default */ @@ -791,8 +791,8 @@ public: } vWhitelistedRange = connOptions.vWhitelistedRange; { - LOCK(cs_vAddedNodes); - vAddedNodes = connOptions.m_added_nodes; + LOCK(m_added_nodes_mutex); + m_added_nodes = connOptions.m_added_nodes; } m_onion_binds = connOptions.onion_binds; } @@ -823,8 +823,8 @@ public: using NodeFn = std::function<void(CNode*)>; void ForEachNode(const NodeFn& func) { - LOCK(cs_vNodes); - for (auto&& node : vNodes) { + LOCK(m_nodes_mutex); + for (auto&& node : m_nodes) { if (NodeFullyConnected(node)) func(node); } @@ -832,8 +832,8 @@ public: void ForEachNode(const NodeFn& func) const { - LOCK(cs_vNodes); - for (auto&& node : vNodes) { + LOCK(m_nodes_mutex); + for (auto&& node : m_nodes) { if (NodeFullyConnected(node)) func(node); } @@ -968,7 +968,7 @@ private: /** * Create a `CNode` object from a socket that has just been accepted and add the node to - * the `vNodes` member. + * the `m_nodes` member. * @param[in] hSocket Connected socket to communicate with the peer. * @param[in] permissionFlags The peer's permissions. * @param[in] addr_bind The address and port at our side of the connection. @@ -983,9 +983,57 @@ private: void NotifyNumConnectionsChanged(); /** Return true if the peer is inactive and should be disconnected. */ bool InactivityCheck(const CNode& node) const; - bool GenerateSelectSet(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set); - void SocketEvents(std::set<SOCKET> &recv_set, std::set<SOCKET> &send_set, std::set<SOCKET> &error_set); + + /** + * 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) + */ + 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); + + /** + * Check connected and listening sockets for IO readiness and process them accordingly. + */ void SocketHandler(); + + /** + * 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). + */ + 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); + + /** + * Accept incoming connections, one from each read-ready listening socket. + * @param[in] recv_set Sockets that are ready for read. + */ + void SocketHandlerListening(const std::set<SOCKET>& recv_set); + void ThreadSocketHandler(); void ThreadDNSAddressSeed(); @@ -1026,9 +1074,8 @@ private: static bool NodeFullyConnected(const CNode* pnode); // Network usage totals - mutable RecursiveMutex cs_totalBytesRecv; mutable RecursiveMutex cs_totalBytesSent; - uint64_t nTotalBytesRecv GUARDED_BY(cs_totalBytesRecv) {0}; + std::atomic<uint64_t> nTotalBytesRecv{0}; uint64_t nTotalBytesSent GUARDED_BY(cs_totalBytesSent) {0}; // outbound limit & stats @@ -1051,12 +1098,12 @@ private: bool fAddressesInitialized{false}; AddrMan& addrman; std::deque<std::string> m_addr_fetches GUARDED_BY(m_addr_fetches_mutex); - RecursiveMutex m_addr_fetches_mutex; - std::vector<std::string> vAddedNodes GUARDED_BY(cs_vAddedNodes); - mutable RecursiveMutex cs_vAddedNodes; - std::vector<CNode*> vNodes GUARDED_BY(cs_vNodes); - std::list<CNode*> vNodesDisconnected; - mutable RecursiveMutex cs_vNodes; + Mutex m_addr_fetches_mutex; + std::vector<std::string> m_added_nodes GUARDED_BY(m_added_nodes_mutex); + mutable Mutex m_added_nodes_mutex; + std::vector<CNode*> m_nodes GUARDED_BY(m_nodes_mutex); + std::list<CNode*> m_nodes_disconnected; + mutable RecursiveMutex m_nodes_mutex; std::atomic<NodeId> nLastNodeId{0}; unsigned int nPrevNodeCount{0}; @@ -1177,6 +1224,43 @@ private: */ std::vector<CService> m_onion_binds; + /** + * RAII helper to atomically create a copy of `m_nodes` and add a reference + * to each of the nodes. The nodes are released when this object is destroyed. + */ + class NodesSnapshot + { + public: + explicit NodesSnapshot(const CConnman& connman, bool shuffle) + { + { + LOCK(connman.m_nodes_mutex); + m_nodes_copy = connman.m_nodes; + for (auto& node : m_nodes_copy) { + node->AddRef(); + } + } + if (shuffle) { + Shuffle(m_nodes_copy.begin(), m_nodes_copy.end(), FastRandomContext{}); + } + } + + ~NodesSnapshot() + { + for (auto& node : m_nodes_copy) { + node->Release(); + } + } + + const std::vector<CNode*>& Nodes() const + { + return m_nodes_copy; + } + + private: + std::vector<CNode*> m_nodes_copy; + }; + friend struct CConnmanTest; friend struct ConnmanTestMsg; }; |