2021-08-22 04:20:59 -06:00
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/*
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* This file is part of the Monero P2Pool <https://github.com/SChernykh/p2pool>
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* Copyright (c) 2021 SChernykh <https://github.com/SChernykh>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "uv_util.h"
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#include <map>
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#include <set>
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namespace p2pool {
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template<size_t READ_BUF_SIZE, size_t WRITE_BUF_SIZE>
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class TCPServer : public nocopy_nomove
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{
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public:
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struct Client;
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typedef Client* (*allocate_client_callback)();
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2021-08-28 16:13:53 -06:00
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explicit TCPServer(allocate_client_callback allocate_new_client);
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2021-08-22 04:20:59 -06:00
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virtual ~TCPServer();
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template<typename T>
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void parse_address_list(const std::string& address_list, T callback);
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bool connect_to_peer(bool is_v6, const char* ip, int port);
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2021-08-26 15:27:05 -06:00
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void drop_connections() { uv_async_send(&m_dropConnectionsAsync); }
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2021-08-22 04:20:59 -06:00
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void shutdown_tcp();
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virtual void print_status();
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uv_loop_t* get_loop() { return &m_loop; }
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int listen_port() const { return m_listenPort; }
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struct raw_ip
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{
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alignas(8) uint8_t data[16];
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FORCEINLINE bool operator<(const raw_ip& other) const
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{
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const uint64_t* a = reinterpret_cast<const uint64_t*>(data);
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const uint64_t* b = reinterpret_cast<const uint64_t*>(other.data);
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if (a[1] < b[1]) return true;
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if (a[1] > b[1]) return false;
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return a[0] < b[0];
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}
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FORCEINLINE bool operator==(const raw_ip& other) const
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{
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const uint64_t* a = reinterpret_cast<const uint64_t*>(data);
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const uint64_t* b = reinterpret_cast<const uint64_t*>(other.data);
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return (a[0] == b[0]) && (a[1] == b[1]);
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}
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FORCEINLINE bool operator!=(const raw_ip& other) const { return !operator==(other); }
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};
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static_assert(sizeof(raw_ip) == 16, "struct raw_ip has invalid size");
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static_assert(sizeof(in6_addr) == 16, "struct in6_addr has invalid size");
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static_assert(sizeof(in_addr) == 4, "struct in_addr has invalid size");
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bool connect_to_peer(bool is_v6, const raw_ip& ip, int port);
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virtual void on_connect_failed(bool is_v6, const raw_ip& ip, int port);
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void ban(const raw_ip& ip, uint64_t seconds);
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struct Client
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{
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Client();
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virtual ~Client();
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virtual void reset();
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virtual bool on_connect() = 0;
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virtual bool on_read(char* data, uint32_t size) = 0;
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static void on_alloc(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf);
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static void on_read(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf);
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static void on_write(uv_write_t* req, int status);
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void close();
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void ban(uint64_t seconds);
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void init_addr_string(bool is_v6, const sockaddr_storage* peer_addr);
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TCPServer* m_owner;
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// Used to maintain connected clients list
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Client* m_prev;
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Client* m_next;
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uv_tcp_t m_socket;
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uv_write_t m_write;
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uv_connect_t m_connectRequest;
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bool m_isV6;
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bool m_isIncoming;
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raw_ip m_addr;
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int m_port;
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char m_addrString[64];
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bool m_readBufInUse;
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char m_readBuf[READ_BUF_SIZE];
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uint32_t m_numRead;
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struct WriteBuf
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{
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Client* m_client;
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uv_write_t m_write;
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char m_data[WRITE_BUF_SIZE];
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};
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uv_mutex_t m_writeBuffersLock;
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std::vector<WriteBuf*> m_writeBuffers;
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std::atomic<uint32_t> m_resetCounter{ 0 };
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uv_mutex_t m_sendLock;
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};
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struct SendCallbackBase
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{
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virtual ~SendCallbackBase() {}
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virtual size_t operator()(void*) = 0;
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};
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template<typename T>
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struct SendCallback : public SendCallbackBase
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{
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explicit FORCEINLINE SendCallback(T&& callback) : m_callback(std::move(callback)) {}
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size_t operator()(void* buf) override { return m_callback(buf); }
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private:
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SendCallback& operator=(SendCallback&&) = delete;
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T m_callback;
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};
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template<typename T>
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FORCEINLINE bool send(Client* client, T&& callback) { return send_internal(client, SendCallback<T>(std::move(callback))); }
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private:
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static void loop(void* data);
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static void on_new_connection(uv_stream_t* server, int status);
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static void on_connection_close(uv_handle_t* handle);
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static void on_connect(uv_connect_t* req, int status);
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void on_new_client(uv_stream_t* server);
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void on_new_client_nolock(uv_stream_t* server, Client* client);
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bool connect_to_peer_nolock(Client* client, bool is_v6, const sockaddr* addr);
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bool send_internal(Client* client, SendCallbackBase&& callback);
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allocate_client_callback m_allocateNewClient;
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2021-08-26 15:27:05 -06:00
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void close_sockets(bool listen_sockets);
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2021-08-22 04:20:59 -06:00
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std::vector<uv_tcp_t*> m_listenSockets6;
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std::vector<uv_tcp_t*> m_listenSockets;
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uv_thread_t m_loopThread;
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protected:
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2021-08-26 15:27:05 -06:00
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void start_listening(const std::string& listen_addresses);
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2021-08-22 04:20:59 -06:00
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std::atomic<int> m_finished{ 0 };
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int m_listenPort;
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uv_loop_t m_loop;
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2021-08-26 15:27:05 -06:00
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volatile bool m_loopStopped;
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2021-08-22 04:20:59 -06:00
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uv_mutex_t m_clientsListLock;
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std::vector<Client*> m_preallocatedClients;
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Client* m_connectedClientsList;
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uint32_t m_numConnections;
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uint32_t m_numIncomingConnections;
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uv_mutex_t m_bansLock;
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std::map<raw_ip, time_t> m_bans;
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2021-08-27 08:36:06 -06:00
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bool is_banned(const raw_ip& ip);
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2021-08-22 04:20:59 -06:00
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uv_mutex_t m_pendingConnectionsLock;
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std::set<raw_ip> m_pendingConnections;
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2021-08-26 15:27:05 -06:00
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uv_async_t m_dropConnectionsAsync;
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static void on_drop_connections(uv_async_t* async) { reinterpret_cast<TCPServer*>(async->data)->close_sockets(false); }
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uv_async_t m_shutdownAsync;
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static void on_shutdown(uv_async_t* async)
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{
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TCPServer* server = reinterpret_cast<TCPServer*>(async->data);
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server->close_sockets(true);
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uv_close(reinterpret_cast<uv_handle_t*>(&server->m_dropConnectionsAsync), nullptr);
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uv_close(reinterpret_cast<uv_handle_t*>(&server->m_shutdownAsync), nullptr);
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}
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2021-08-22 04:20:59 -06:00
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};
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} // namespace p2pool
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