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include/comm/packet/packet_server.hpp

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+/*
+  Copyright <2018-2022> <scott.e.graves@protonmail.com>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
+  associated documentation files (the "Software"), to deal in the Software without restriction,
+  including without limitation the rights to use, copy, modify, merge, publish, distribute,
+  sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all copies or
+  substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+  NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+  DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
+  OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+#ifndef INCLUDE_COMM_PACKET_PACKET_SERVER_HPP_
+#define INCLUDE_COMM_PACKET_PACKET_SERVER_HPP_
+
+#include "common.hpp"
+#include "comm/packet/client_pool.hpp"
+#include "utils/utils.hpp"
+
+using namespace boost::asio;
+using boost::asio::ip::tcp;
+
+namespace repertory {
+class packet_server final {
+public:
+  typedef std::function<void(const std::string &clientId)> closed_callback;
+  typedef client_pool::worker_complete_callback message_complete_callback;
+  typedef std::function<void(const std::uint32_t &service_flags, const std::string &client_id,
+                             const std::uint64_t &thread_id, const std::string &method,
+                             packet *request, packet &response,
+                             message_complete_callback message_complete)>
+      message_handler_callback;
+
+public:
+  packet_server(const std::uint16_t &port, std::string token, std::uint8_t pool_size,
+                closed_callback closed, message_handler_callback message_handler);
+
+  ~packet_server();
+
+private:
+  struct connection {
+    connection(boost::asio::io_service &io_service, tcp::acceptor &acceptor)
+        : socket(io_service), acceptor(acceptor) {}
+
+    tcp::socket socket;
+    tcp::acceptor &acceptor;
+    std::vector<char> buffer;
+    std::string client_id;
+    std::string nonce;
+
+    void generate_nonce() { nonce = utils::generate_random_string(256u); }
+  };
+
+private:
+  const std::string encryption_token_;
+  closed_callback closed_;
+  message_handler_callback message_handler_;
+  boost::asio::io_context io_context_;
+  std::unique_ptr<std::thread> server_thread_;
+  std::vector<std::thread> service_threads_;
+  std::recursive_mutex connection_mutex_;
+  std::unordered_map<std::string, std::uint32_t> connection_lookup_;
+
+private:
+  void add_client(connection &c, const std::string &client_id);
+
+  void initialize(const uint16_t &port, uint8_t pool_size);
+
+  void listen_for_connection(tcp::acceptor &acceptor);
+
+  void on_accept(std::shared_ptr<connection> c, boost::system::error_code ec);
+
+  void read_header(std::shared_ptr<connection> c);
+
+  void read_packet(std::shared_ptr<connection> c, const std::uint32_t &data_size);
+
+  void remove_client(connection &c);
+
+  void send_response(std::shared_ptr<connection> c, const packet::error_type &result,
+                     packet &response);
+};
+} // namespace repertory
+
+#endif // INCLUDE_COMM_PACKET_PACKET_SERVER_HPP_