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Add Tls implementation in client & doip lib
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223
diag-client-lib/lib/boost-support/client/tcp/tcp_client.h
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| /* Diagnostic Client library | ||
| * Copyright (C) 2023 Avijit Dey | ||
| * | ||
| * This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
| */ | ||
| #ifndef DIAG_CLIENT_LIB_LIB_BOOST_SUPPORT_CLIENT_TCP_TCP_CLIENT_H_ | ||
| #define DIAG_CLIENT_LIB_LIB_BOOST_SUPPORT_CLIENT_TCP_TCP_CLIENT_H_ | ||
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| #include <atomic> | ||
| #include <condition_variable> | ||
| #include <functional> | ||
| #include <memory> | ||
| #include <mutex> | ||
| #include <thread> | ||
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| #include "core/include/result.h" | ||
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| namespace boost_support { | ||
| namespace client { | ||
| namespace tcp { | ||
|
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| /** | ||
| * @brief Client class used to handle transmission and reception of tcp message from socket | ||
| * @tparam SocketType | ||
| * The type of socket to read and write from/to | ||
| */ | ||
| template<typename SocketType> | ||
| class TcpClient final { | ||
| public: | ||
| /** | ||
| * @brief Tcp error code | ||
| */ | ||
| enum class TcpErrorCode : std::uint8_t { kOpenFailed, kBindingFailed, kGenericError }; | ||
|
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| /** | ||
| * @brief Type alias for Tcp message | ||
| */ | ||
| using TcpMessage = typename SocketType::TcpMessage; | ||
|
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| /** | ||
| * @brief Type alias for Tcp message pointer | ||
| */ | ||
| using TcpMessagePtr = typename SocketType::TcpMessagePtr; | ||
|
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| /** | ||
| * @brief Type alias for Tcp message const pointer | ||
| */ | ||
| using TcpMessageConstPtr = typename SocketType::TcpMessageConstPtr; | ||
|
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| /** | ||
| * @brief Tcp function template used for reception | ||
| */ | ||
| using HandlerRead = std::function<void(TcpMessagePtr)>; | ||
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| public: | ||
| /** | ||
| * @brief Constructs an instance of TcpClient | ||
| * @param[in] socket | ||
| * The socket used for read and writing messages | ||
| * @param[in] handler_read | ||
| * The handler to send received data to user | ||
| */ | ||
| TcpClient(SocketType socket, HandlerRead handler_read) noexcept | ||
| : socket_{std::move(socket)}, | ||
| handler_read_{std::move(handler_read)}, | ||
| exit_request_{false}, | ||
| running_{false}, | ||
| cond_var_{}, | ||
| thread_{}, | ||
| mutex_{} {} | ||
|
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| /** | ||
| * @brief Deleted copy assignment and copy constructor | ||
| */ | ||
| TcpClient(const TcpClient &other) noexcept = delete; | ||
| TcpClient &operator=(const TcpClient &other) &noexcept = delete; | ||
|
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| /** | ||
| * @brief Deleted move assignment and move constructor | ||
| */ | ||
| TcpClient(TcpClient &&other) noexcept = delete; | ||
| TcpClient &operator=(TcpClient &&other) &noexcept = delete; | ||
|
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| /** | ||
| * @brief Destruct an instance of TcpClientSocket | ||
| */ | ||
| ~TcpClient() noexcept = default; | ||
|
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| /** | ||
| * @brief Initialize the client | ||
| * @return Empty result on success otherwise error code | ||
| */ | ||
| void Initialize() noexcept { | ||
| // Open socket | ||
| socket_.Open(); | ||
| // Start thread to receive messages | ||
| thread_ = std::thread([this]() { | ||
| std::unique_lock<std::mutex> lck(mutex_); | ||
| while (!exit_request_) { | ||
| if (!running_) { | ||
| cond_var_.wait(lck, [this]() { return exit_request_ || running_; }); | ||
| } | ||
| if (!exit_request_.load()) { | ||
| if (running_) { running_ = ReadMessage(); } | ||
| } | ||
| } | ||
| }); | ||
| } | ||
|
|
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| /** | ||
| * @brief Function to connect to remote ip address and port number | ||
| * @param[in] host_ip_address | ||
| * The host ip address | ||
| * @param[in] host_port_num | ||
| * The host port number | ||
| * @return Empty result on success otherwise error code | ||
| */ | ||
| bool ConnectToHost(std::string_view host_ip_address, std::uint16_t host_port_num) noexcept { | ||
| return socket_.Connect(host_ip_address, host_port_num) | ||
| .AndThen([this]() noexcept { | ||
| { // start reading | ||
| std::lock_guard<std::mutex> lock{mutex_}; | ||
| running_ = true; | ||
| cond_var_.notify_all(); | ||
| } | ||
| }) | ||
| .HasValue(); | ||
| } | ||
|
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| /** | ||
| * @brief Function to Disconnect from host | ||
| * @return Empty result on success otherwise error code | ||
| */ | ||
| void DisconnectFromHost() noexcept { | ||
| { // stop reading | ||
| std::lock_guard<std::mutex> lock{mutex_}; | ||
| running_ = false; | ||
| } | ||
| static_cast<void>(socket_.Disconnect()); | ||
| } | ||
|
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| /** | ||
| * @brief Function to trigger transmission | ||
| * @param[in] message | ||
| * The tcp message to be transmitted | ||
| * @return Empty result on success otherwise error code | ||
| */ | ||
| bool Transmit(TcpMessageConstPtr message) noexcept { return socket_.Transmit(std::move(message)).HasValue(); } | ||
|
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| /** | ||
| * @brief De-initialize the client | ||
| * @return Empty result on success otherwise error code | ||
| */ | ||
| void Deinitialize() noexcept { | ||
| socket_.Close(); | ||
| { | ||
| std::unique_lock<std::mutex> lck(mutex_); | ||
| exit_request_ = true; | ||
| running_ = false; | ||
| } | ||
| cond_var_.notify_all(); | ||
| thread_.join(); | ||
| } | ||
|
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| private: | ||
| /** | ||
| * @brief Store socket used for reading and writing tcp message | ||
| */ | ||
| SocketType socket_; | ||
|
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| /** | ||
| * @brief Store the handler | ||
| */ | ||
| HandlerRead handler_read_; | ||
|
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| /** | ||
| * @brief Flag to terminate the thread | ||
| */ | ||
| std::atomic_bool exit_request_; | ||
|
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| /** | ||
| * @brief Flag to start the thread | ||
| */ | ||
| std::atomic_bool running_; | ||
|
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| /** | ||
| * @brief Conditional variable to block the thread | ||
| */ | ||
| std::condition_variable cond_var_; | ||
|
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| /** | ||
| * @brief Store the thread | ||
| */ | ||
| std::thread thread_; | ||
|
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| /** | ||
| * @brief mutex to lock critical section | ||
| */ | ||
| std::mutex mutex_; | ||
|
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| private: | ||
| /** | ||
| * @brief Function to send the received message to stored handler | ||
| * @return True if message is read successfully, otherwise False | ||
| */ | ||
| bool ReadMessage() { | ||
| bool is_message_read{false}; | ||
| if (handler_read_) { | ||
| core_type::Result<TcpMessagePtr, typename SocketType::SocketError> read_result{socket_.Read()}; | ||
| if (read_result.HasValue()) { | ||
| handler_read_(std::move(read_result).Value()); | ||
| is_message_read = true; | ||
| } | ||
| } | ||
| return is_message_read; | ||
| } | ||
| }; | ||
| } // namespace tcp | ||
| } // namespace client | ||
| } // namespace boost_support | ||
| #endif // DIAG_CLIENT_LIB_LIB_BOOST_SUPPORT_CLIENT_TCP_TCP_CLIENT_H_ |
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