// // basic_socket_acceptor.hpp // ~~~~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com) // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #ifndef ASIO_BASIC_SOCKET_ACCEPTOR_HPP #define ASIO_BASIC_SOCKET_ACCEPTOR_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include "asio/detail/config.hpp" #include "asio/basic_io_object.hpp" #include "asio/basic_socket.hpp" #include "asio/detail/handler_type_requirements.hpp" #include "asio/detail/throw_error.hpp" #include "asio/detail/type_traits.hpp" #include "asio/error.hpp" #include "asio/socket_base.hpp" #if defined(ASIO_HAS_MOVE) # include #endif // defined(ASIO_HAS_MOVE) #if defined(ASIO_ENABLE_OLD_SERVICES) # include "asio/socket_acceptor_service.hpp" #else // defined(ASIO_ENABLE_OLD_SERVICES) # if defined(ASIO_WINDOWS_RUNTIME) # include "asio/detail/null_socket_service.hpp" # define ASIO_SVC_T detail::null_socket_service # elif defined(ASIO_HAS_IOCP) # include "asio/detail/win_iocp_socket_service.hpp" # define ASIO_SVC_T detail::win_iocp_socket_service # else # include "asio/detail/reactive_socket_service.hpp" # define ASIO_SVC_T detail::reactive_socket_service # endif #endif // defined(ASIO_ENABLE_OLD_SERVICES) #include "asio/detail/push_options.hpp" namespace asio { /// Provides the ability to accept new connections. /** * The basic_socket_acceptor class template is used for accepting new socket * connections. * * @par Thread Safety * @e Distinct @e objects: Safe.@n * @e Shared @e objects: Unsafe. * * @par Example * Opening a socket acceptor with the SO_REUSEADDR option enabled: * @code * asio::ip::tcp::acceptor acceptor(io_context); * asio::ip::tcp::endpoint endpoint(asio::ip::tcp::v4(), port); * acceptor.open(endpoint.protocol()); * acceptor.set_option(asio::ip::tcp::acceptor::reuse_address(true)); * acceptor.bind(endpoint); * acceptor.listen(); * @endcode */ template )> class basic_socket_acceptor : ASIO_SVC_ACCESS basic_io_object, public socket_base { public: /// The type of the executor associated with the object. typedef io_context::executor_type executor_type; /// The native representation of an acceptor. #if defined(GENERATING_DOCUMENTATION) typedef implementation_defined native_handle_type; #else typedef typename ASIO_SVC_T::native_handle_type native_handle_type; #endif /// The protocol type. typedef Protocol protocol_type; /// The endpoint type. typedef typename Protocol::endpoint endpoint_type; /// Construct an acceptor without opening it. /** * This constructor creates an acceptor without opening it to listen for new * connections. The open() function must be called before the acceptor can * accept new socket connections. * * @param io_context The io_context object that the acceptor will use to * dispatch handlers for any asynchronous operations performed on the * acceptor. */ explicit basic_socket_acceptor(asio::io_context& io_context) : basic_io_object(io_context) { } /// Construct an open acceptor. /** * This constructor creates an acceptor and automatically opens it. * * @param io_context The io_context object that the acceptor will use to * dispatch handlers for any asynchronous operations performed on the * acceptor. * * @param protocol An object specifying protocol parameters to be used. * * @throws asio::system_error Thrown on failure. */ basic_socket_acceptor(asio::io_context& io_context, const protocol_type& protocol) : basic_io_object(io_context) { asio::error_code ec; this->get_service().open(this->get_implementation(), protocol, ec); asio::detail::throw_error(ec, "open"); } /// Construct an acceptor opened on the given endpoint. /** * This constructor creates an acceptor and automatically opens it to listen * for new connections on the specified endpoint. * * @param io_context The io_context object that the acceptor will use to * dispatch handlers for any asynchronous operations performed on the * acceptor. * * @param endpoint An endpoint on the local machine on which the acceptor * will listen for new connections. * * @param reuse_addr Whether the constructor should set the socket option * socket_base::reuse_address. * * @throws asio::system_error Thrown on failure. * * @note This constructor is equivalent to the following code: * @code * basic_socket_acceptor acceptor(io_context); * acceptor.open(endpoint.protocol()); * if (reuse_addr) * acceptor.set_option(socket_base::reuse_address(true)); * acceptor.bind(endpoint); * acceptor.listen(listen_backlog); * @endcode */ basic_socket_acceptor(asio::io_context& io_context, const endpoint_type& endpoint, bool reuse_addr = true) : basic_io_object(io_context) { asio::error_code ec; const protocol_type protocol = endpoint.protocol(); this->get_service().open(this->get_implementation(), protocol, ec); asio::detail::throw_error(ec, "open"); if (reuse_addr) { this->get_service().set_option(this->get_implementation(), socket_base::reuse_address(true), ec); asio::detail::throw_error(ec, "set_option"); } this->get_service().bind(this->get_implementation(), endpoint, ec); asio::detail::throw_error(ec, "bind"); this->get_service().listen(this->get_implementation(), socket_base::max_listen_connections, ec); asio::detail::throw_error(ec, "listen"); } /// Construct a basic_socket_acceptor on an existing native acceptor. /** * This constructor creates an acceptor object to hold an existing native * acceptor. * * @param io_context The io_context object that the acceptor will use to * dispatch handlers for any asynchronous operations performed on the * acceptor. * * @param protocol An object specifying protocol parameters to be used. * * @param native_acceptor A native acceptor. * * @throws asio::system_error Thrown on failure. */ basic_socket_acceptor(asio::io_context& io_context, const protocol_type& protocol, const native_handle_type& native_acceptor) : basic_io_object(io_context) { asio::error_code ec; this->get_service().assign(this->get_implementation(), protocol, native_acceptor, ec); asio::detail::throw_error(ec, "assign"); } #if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) /// Move-construct a basic_socket_acceptor from another. /** * This constructor moves an acceptor from one object to another. * * @param other The other basic_socket_acceptor object from which the move * will occur. * * @note Following the move, the moved-from object is in the same state as if * constructed using the @c basic_socket_acceptor(io_context&) constructor. */ basic_socket_acceptor(basic_socket_acceptor&& other) : basic_io_object(std::move(other)) { } /// Move-assign a basic_socket_acceptor from another. /** * This assignment operator moves an acceptor from one object to another. * * @param other The other basic_socket_acceptor object from which the move * will occur. * * @note Following the move, the moved-from object is in the same state as if * constructed using the @c basic_socket_acceptor(io_context&) constructor. */ basic_socket_acceptor& operator=(basic_socket_acceptor&& other) { basic_io_object::operator=(std::move(other)); return *this; } // All socket acceptors have access to each other's implementations. template friend class basic_socket_acceptor; /// Move-construct a basic_socket_acceptor from an acceptor of another /// protocol type. /** * This constructor moves an acceptor from one object to another. * * @param other The other basic_socket_acceptor object from which the move * will occur. * * @note Following the move, the moved-from object is in the same state as if * constructed using the @c basic_socket(io_context&) constructor. */ template basic_socket_acceptor( basic_socket_acceptor&& other, typename enable_if::value>::type* = 0) : basic_io_object( other.get_service(), other.get_implementation()) { } /// Move-assign a basic_socket_acceptor from an acceptor of another protocol /// type. /** * This assignment operator moves an acceptor from one object to another. * * @param other The other basic_socket_acceptor object from which the move * will occur. * * @note Following the move, the moved-from object is in the same state as if * constructed using the @c basic_socket(io_context&) constructor. */ template typename enable_if::value, basic_socket_acceptor>::type& operator=( basic_socket_acceptor&& other) { basic_socket_acceptor tmp(std::move(other)); basic_io_object::operator=(std::move(tmp)); return *this; } #endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) /// Destroys the acceptor. /** * This function destroys the acceptor, cancelling any outstanding * asynchronous operations associated with the acceptor as if by calling * @c cancel. */ ~basic_socket_acceptor() { } #if defined(ASIO_ENABLE_OLD_SERVICES) // These functions are provided by basic_io_object<>. #else // defined(ASIO_ENABLE_OLD_SERVICES) #if !defined(ASIO_NO_DEPRECATED) /// (Deprecated: Use get_executor().) Get the io_context associated with the /// object. /** * This function may be used to obtain the io_context object that the I/O * object uses to dispatch handlers for asynchronous operations. * * @return A reference to the io_context object that the I/O object will use * to dispatch handlers. Ownership is not transferred to the caller. */ asio::io_context& get_io_context() { return basic_io_object::get_io_context(); } /// (Deprecated: Use get_executor().) Get the io_context associated with the /// object. /** * This function may be used to obtain the io_context object that the I/O * object uses to dispatch handlers for asynchronous operations. * * @return A reference to the io_context object that the I/O object will use * to dispatch handlers. Ownership is not transferred to the caller. */ asio::io_context& get_io_service() { return basic_io_object::get_io_service(); } #endif // !defined(ASIO_NO_DEPRECATED) /// Get the executor associated with the object. executor_type get_executor() ASIO_NOEXCEPT { return basic_io_object::get_executor(); } #endif // defined(ASIO_ENABLE_OLD_SERVICES) /// Open the acceptor using the specified protocol. /** * This function opens the socket acceptor so that it will use the specified * protocol. * * @param protocol An object specifying which protocol is to be used. * * @throws asio::system_error Thrown on failure. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * acceptor.open(asio::ip::tcp::v4()); * @endcode */ void open(const protocol_type& protocol = protocol_type()) { asio::error_code ec; this->get_service().open(this->get_implementation(), protocol, ec); asio::detail::throw_error(ec, "open"); } /// Open the acceptor using the specified protocol. /** * This function opens the socket acceptor so that it will use the specified * protocol. * * @param protocol An object specifying which protocol is to be used. * * @param ec Set to indicate what error occurred, if any. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * asio::error_code ec; * acceptor.open(asio::ip::tcp::v4(), ec); * if (ec) * { * // An error occurred. * } * @endcode */ ASIO_SYNC_OP_VOID open(const protocol_type& protocol, asio::error_code& ec) { this->get_service().open(this->get_implementation(), protocol, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Assigns an existing native acceptor to the acceptor. /* * This function opens the acceptor to hold an existing native acceptor. * * @param protocol An object specifying which protocol is to be used. * * @param native_acceptor A native acceptor. * * @throws asio::system_error Thrown on failure. */ void assign(const protocol_type& protocol, const native_handle_type& native_acceptor) { asio::error_code ec; this->get_service().assign(this->get_implementation(), protocol, native_acceptor, ec); asio::detail::throw_error(ec, "assign"); } /// Assigns an existing native acceptor to the acceptor. /* * This function opens the acceptor to hold an existing native acceptor. * * @param protocol An object specifying which protocol is to be used. * * @param native_acceptor A native acceptor. * * @param ec Set to indicate what error occurred, if any. */ ASIO_SYNC_OP_VOID assign(const protocol_type& protocol, const native_handle_type& native_acceptor, asio::error_code& ec) { this->get_service().assign(this->get_implementation(), protocol, native_acceptor, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Determine whether the acceptor is open. bool is_open() const { return this->get_service().is_open(this->get_implementation()); } /// Bind the acceptor to the given local endpoint. /** * This function binds the socket acceptor to the specified endpoint on the * local machine. * * @param endpoint An endpoint on the local machine to which the socket * acceptor will be bound. * * @throws asio::system_error Thrown on failure. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * asio::ip::tcp::endpoint endpoint(asio::ip::tcp::v4(), 12345); * acceptor.open(endpoint.protocol()); * acceptor.bind(endpoint); * @endcode */ void bind(const endpoint_type& endpoint) { asio::error_code ec; this->get_service().bind(this->get_implementation(), endpoint, ec); asio::detail::throw_error(ec, "bind"); } /// Bind the acceptor to the given local endpoint. /** * This function binds the socket acceptor to the specified endpoint on the * local machine. * * @param endpoint An endpoint on the local machine to which the socket * acceptor will be bound. * * @param ec Set to indicate what error occurred, if any. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * asio::ip::tcp::endpoint endpoint(asio::ip::tcp::v4(), 12345); * acceptor.open(endpoint.protocol()); * asio::error_code ec; * acceptor.bind(endpoint, ec); * if (ec) * { * // An error occurred. * } * @endcode */ ASIO_SYNC_OP_VOID bind(const endpoint_type& endpoint, asio::error_code& ec) { this->get_service().bind(this->get_implementation(), endpoint, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Place the acceptor into the state where it will listen for new /// connections. /** * This function puts the socket acceptor into the state where it may accept * new connections. * * @param backlog The maximum length of the queue of pending connections. * * @throws asio::system_error Thrown on failure. */ void listen(int backlog = socket_base::max_listen_connections) { asio::error_code ec; this->get_service().listen(this->get_implementation(), backlog, ec); asio::detail::throw_error(ec, "listen"); } /// Place the acceptor into the state where it will listen for new /// connections. /** * This function puts the socket acceptor into the state where it may accept * new connections. * * @param backlog The maximum length of the queue of pending connections. * * @param ec Set to indicate what error occurred, if any. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::error_code ec; * acceptor.listen(asio::socket_base::max_listen_connections, ec); * if (ec) * { * // An error occurred. * } * @endcode */ ASIO_SYNC_OP_VOID listen(int backlog, asio::error_code& ec) { this->get_service().listen(this->get_implementation(), backlog, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Close the acceptor. /** * This function is used to close the acceptor. Any asynchronous accept * operations will be cancelled immediately. * * A subsequent call to open() is required before the acceptor can again be * used to again perform socket accept operations. * * @throws asio::system_error Thrown on failure. */ void close() { asio::error_code ec; this->get_service().close(this->get_implementation(), ec); asio::detail::throw_error(ec, "close"); } /// Close the acceptor. /** * This function is used to close the acceptor. Any asynchronous accept * operations will be cancelled immediately. * * A subsequent call to open() is required before the acceptor can again be * used to again perform socket accept operations. * * @param ec Set to indicate what error occurred, if any. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::error_code ec; * acceptor.close(ec); * if (ec) * { * // An error occurred. * } * @endcode */ ASIO_SYNC_OP_VOID close(asio::error_code& ec) { this->get_service().close(this->get_implementation(), ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Release ownership of the underlying native acceptor. /** * This function causes all outstanding asynchronous accept operations to * finish immediately, and the handlers for cancelled operations will be * passed the asio::error::operation_aborted error. Ownership of the * native acceptor is then transferred to the caller. * * @throws asio::system_error Thrown on failure. * * @note This function is unsupported on Windows versions prior to Windows * 8.1, and will fail with asio::error::operation_not_supported on * these platforms. */ #if defined(ASIO_MSVC) && (ASIO_MSVC >= 1400) \ && (!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0603) __declspec(deprecated("This function always fails with " "operation_not_supported when used on Windows versions " "prior to Windows 8.1.")) #endif native_handle_type release() { asio::error_code ec; native_handle_type s = this->get_service().release( this->get_implementation(), ec); asio::detail::throw_error(ec, "release"); return s; } /// Release ownership of the underlying native acceptor. /** * This function causes all outstanding asynchronous accept operations to * finish immediately, and the handlers for cancelled operations will be * passed the asio::error::operation_aborted error. Ownership of the * native acceptor is then transferred to the caller. * * @param ec Set to indicate what error occurred, if any. * * @note This function is unsupported on Windows versions prior to Windows * 8.1, and will fail with asio::error::operation_not_supported on * these platforms. */ #if defined(ASIO_MSVC) && (ASIO_MSVC >= 1400) \ && (!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0603) __declspec(deprecated("This function always fails with " "operation_not_supported when used on Windows versions " "prior to Windows 8.1.")) #endif native_handle_type release(asio::error_code& ec) { return this->get_service().release(this->get_implementation(), ec); } /// Get the native acceptor representation. /** * This function may be used to obtain the underlying representation of the * acceptor. This is intended to allow access to native acceptor functionality * that is not otherwise provided. */ native_handle_type native_handle() { return this->get_service().native_handle(this->get_implementation()); } /// Cancel all asynchronous operations associated with the acceptor. /** * This function causes all outstanding asynchronous connect, send and receive * operations to finish immediately, and the handlers for cancelled operations * will be passed the asio::error::operation_aborted error. * * @throws asio::system_error Thrown on failure. */ void cancel() { asio::error_code ec; this->get_service().cancel(this->get_implementation(), ec); asio::detail::throw_error(ec, "cancel"); } /// Cancel all asynchronous operations associated with the acceptor. /** * This function causes all outstanding asynchronous connect, send and receive * operations to finish immediately, and the handlers for cancelled operations * will be passed the asio::error::operation_aborted error. * * @param ec Set to indicate what error occurred, if any. */ ASIO_SYNC_OP_VOID cancel(asio::error_code& ec) { this->get_service().cancel(this->get_implementation(), ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Set an option on the acceptor. /** * This function is used to set an option on the acceptor. * * @param option The new option value to be set on the acceptor. * * @throws asio::system_error Thrown on failure. * * @sa SettableSocketOption @n * asio::socket_base::reuse_address * asio::socket_base::enable_connection_aborted * * @par Example * Setting the SOL_SOCKET/SO_REUSEADDR option: * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::acceptor::reuse_address option(true); * acceptor.set_option(option); * @endcode */ template void set_option(const SettableSocketOption& option) { asio::error_code ec; this->get_service().set_option(this->get_implementation(), option, ec); asio::detail::throw_error(ec, "set_option"); } /// Set an option on the acceptor. /** * This function is used to set an option on the acceptor. * * @param option The new option value to be set on the acceptor. * * @param ec Set to indicate what error occurred, if any. * * @sa SettableSocketOption @n * asio::socket_base::reuse_address * asio::socket_base::enable_connection_aborted * * @par Example * Setting the SOL_SOCKET/SO_REUSEADDR option: * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::acceptor::reuse_address option(true); * asio::error_code ec; * acceptor.set_option(option, ec); * if (ec) * { * // An error occurred. * } * @endcode */ template ASIO_SYNC_OP_VOID set_option(const SettableSocketOption& option, asio::error_code& ec) { this->get_service().set_option(this->get_implementation(), option, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Get an option from the acceptor. /** * This function is used to get the current value of an option on the * acceptor. * * @param option The option value to be obtained from the acceptor. * * @throws asio::system_error Thrown on failure. * * @sa GettableSocketOption @n * asio::socket_base::reuse_address * * @par Example * Getting the value of the SOL_SOCKET/SO_REUSEADDR option: * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::acceptor::reuse_address option; * acceptor.get_option(option); * bool is_set = option.get(); * @endcode */ template void get_option(GettableSocketOption& option) const { asio::error_code ec; this->get_service().get_option(this->get_implementation(), option, ec); asio::detail::throw_error(ec, "get_option"); } /// Get an option from the acceptor. /** * This function is used to get the current value of an option on the * acceptor. * * @param option The option value to be obtained from the acceptor. * * @param ec Set to indicate what error occurred, if any. * * @sa GettableSocketOption @n * asio::socket_base::reuse_address * * @par Example * Getting the value of the SOL_SOCKET/SO_REUSEADDR option: * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::acceptor::reuse_address option; * asio::error_code ec; * acceptor.get_option(option, ec); * if (ec) * { * // An error occurred. * } * bool is_set = option.get(); * @endcode */ template ASIO_SYNC_OP_VOID get_option(GettableSocketOption& option, asio::error_code& ec) const { this->get_service().get_option(this->get_implementation(), option, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Perform an IO control command on the acceptor. /** * This function is used to execute an IO control command on the acceptor. * * @param command The IO control command to be performed on the acceptor. * * @throws asio::system_error Thrown on failure. * * @sa IoControlCommand @n * asio::socket_base::non_blocking_io * * @par Example * Getting the number of bytes ready to read: * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::acceptor::non_blocking_io command(true); * socket.io_control(command); * @endcode */ template void io_control(IoControlCommand& command) { asio::error_code ec; this->get_service().io_control(this->get_implementation(), command, ec); asio::detail::throw_error(ec, "io_control"); } /// Perform an IO control command on the acceptor. /** * This function is used to execute an IO control command on the acceptor. * * @param command The IO control command to be performed on the acceptor. * * @param ec Set to indicate what error occurred, if any. * * @sa IoControlCommand @n * asio::socket_base::non_blocking_io * * @par Example * Getting the number of bytes ready to read: * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::acceptor::non_blocking_io command(true); * asio::error_code ec; * socket.io_control(command, ec); * if (ec) * { * // An error occurred. * } * @endcode */ template ASIO_SYNC_OP_VOID io_control(IoControlCommand& command, asio::error_code& ec) { this->get_service().io_control(this->get_implementation(), command, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Gets the non-blocking mode of the acceptor. /** * @returns @c true if the acceptor's synchronous operations will fail with * asio::error::would_block if they are unable to perform the requested * operation immediately. If @c false, synchronous operations will block * until complete. * * @note The non-blocking mode has no effect on the behaviour of asynchronous * operations. Asynchronous operations will never fail with the error * asio::error::would_block. */ bool non_blocking() const { return this->get_service().non_blocking(this->get_implementation()); } /// Sets the non-blocking mode of the acceptor. /** * @param mode If @c true, the acceptor's synchronous operations will fail * with asio::error::would_block if they are unable to perform the * requested operation immediately. If @c false, synchronous operations will * block until complete. * * @throws asio::system_error Thrown on failure. * * @note The non-blocking mode has no effect on the behaviour of asynchronous * operations. Asynchronous operations will never fail with the error * asio::error::would_block. */ void non_blocking(bool mode) { asio::error_code ec; this->get_service().non_blocking(this->get_implementation(), mode, ec); asio::detail::throw_error(ec, "non_blocking"); } /// Sets the non-blocking mode of the acceptor. /** * @param mode If @c true, the acceptor's synchronous operations will fail * with asio::error::would_block if they are unable to perform the * requested operation immediately. If @c false, synchronous operations will * block until complete. * * @param ec Set to indicate what error occurred, if any. * * @note The non-blocking mode has no effect on the behaviour of asynchronous * operations. Asynchronous operations will never fail with the error * asio::error::would_block. */ ASIO_SYNC_OP_VOID non_blocking( bool mode, asio::error_code& ec) { this->get_service().non_blocking(this->get_implementation(), mode, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Gets the non-blocking mode of the native acceptor implementation. /** * This function is used to retrieve the non-blocking mode of the underlying * native acceptor. This mode has no effect on the behaviour of the acceptor * object's synchronous operations. * * @returns @c true if the underlying acceptor is in non-blocking mode and * direct system calls may fail with asio::error::would_block (or the * equivalent system error). * * @note The current non-blocking mode is cached by the acceptor object. * Consequently, the return value may be incorrect if the non-blocking mode * was set directly on the native acceptor. */ bool native_non_blocking() const { return this->get_service().native_non_blocking(this->get_implementation()); } /// Sets the non-blocking mode of the native acceptor implementation. /** * This function is used to modify the non-blocking mode of the underlying * native acceptor. It has no effect on the behaviour of the acceptor object's * synchronous operations. * * @param mode If @c true, the underlying acceptor is put into non-blocking * mode and direct system calls may fail with asio::error::would_block * (or the equivalent system error). * * @throws asio::system_error Thrown on failure. If the @c mode is * @c false, but the current value of @c non_blocking() is @c true, this * function fails with asio::error::invalid_argument, as the * combination does not make sense. */ void native_non_blocking(bool mode) { asio::error_code ec; this->get_service().native_non_blocking( this->get_implementation(), mode, ec); asio::detail::throw_error(ec, "native_non_blocking"); } /// Sets the non-blocking mode of the native acceptor implementation. /** * This function is used to modify the non-blocking mode of the underlying * native acceptor. It has no effect on the behaviour of the acceptor object's * synchronous operations. * * @param mode If @c true, the underlying acceptor is put into non-blocking * mode and direct system calls may fail with asio::error::would_block * (or the equivalent system error). * * @param ec Set to indicate what error occurred, if any. If the @c mode is * @c false, but the current value of @c non_blocking() is @c true, this * function fails with asio::error::invalid_argument, as the * combination does not make sense. */ ASIO_SYNC_OP_VOID native_non_blocking( bool mode, asio::error_code& ec) { this->get_service().native_non_blocking( this->get_implementation(), mode, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Get the local endpoint of the acceptor. /** * This function is used to obtain the locally bound endpoint of the acceptor. * * @returns An object that represents the local endpoint of the acceptor. * * @throws asio::system_error Thrown on failure. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::endpoint endpoint = acceptor.local_endpoint(); * @endcode */ endpoint_type local_endpoint() const { asio::error_code ec; endpoint_type ep = this->get_service().local_endpoint( this->get_implementation(), ec); asio::detail::throw_error(ec, "local_endpoint"); return ep; } /// Get the local endpoint of the acceptor. /** * This function is used to obtain the locally bound endpoint of the acceptor. * * @param ec Set to indicate what error occurred, if any. * * @returns An object that represents the local endpoint of the acceptor. * Returns a default-constructed endpoint object if an error occurred and the * error handler did not throw an exception. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::error_code ec; * asio::ip::tcp::endpoint endpoint = acceptor.local_endpoint(ec); * if (ec) * { * // An error occurred. * } * @endcode */ endpoint_type local_endpoint(asio::error_code& ec) const { return this->get_service().local_endpoint(this->get_implementation(), ec); } /// Wait for the acceptor to become ready to read, ready to write, or to have /// pending error conditions. /** * This function is used to perform a blocking wait for an acceptor to enter * a ready to read, write or error condition state. * * @param w Specifies the desired acceptor state. * * @par Example * Waiting for an acceptor to become readable. * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * acceptor.wait(asio::ip::tcp::acceptor::wait_read); * @endcode */ void wait(wait_type w) { asio::error_code ec; this->get_service().wait(this->get_implementation(), w, ec); asio::detail::throw_error(ec, "wait"); } /// Wait for the acceptor to become ready to read, ready to write, or to have /// pending error conditions. /** * This function is used to perform a blocking wait for an acceptor to enter * a ready to read, write or error condition state. * * @param w Specifies the desired acceptor state. * * @param ec Set to indicate what error occurred, if any. * * @par Example * Waiting for an acceptor to become readable. * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::error_code ec; * acceptor.wait(asio::ip::tcp::acceptor::wait_read, ec); * @endcode */ ASIO_SYNC_OP_VOID wait(wait_type w, asio::error_code& ec) { this->get_service().wait(this->get_implementation(), w, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Asynchronously wait for the acceptor to become ready to read, ready to /// write, or to have pending error conditions. /** * This function is used to perform an asynchronous wait for an acceptor to * enter a ready to read, write or error condition state. * * @param w Specifies the desired acceptor state. * * @param handler The handler to be called when the wait operation completes. * Copies will be made of the handler as required. The function signature of * the handler must be: * @code void handler( * const asio::error_code& error // Result of operation * ); @endcode * Regardless of whether the asynchronous operation completes immediately or * not, the handler will not be invoked from within this function. Invocation * of the handler will be performed in a manner equivalent to using * asio::io_context::post(). * * @par Example * @code * void wait_handler(const asio::error_code& error) * { * if (!error) * { * // Wait succeeded. * } * } * * ... * * asio::ip::tcp::acceptor acceptor(io_context); * ... * acceptor.async_wait( * asio::ip::tcp::acceptor::wait_read, * wait_handler); * @endcode */ template ASIO_INITFN_RESULT_TYPE(WaitHandler, void (asio::error_code)) async_wait(wait_type w, ASIO_MOVE_ARG(WaitHandler) handler) { // If you get an error on the following line it means that your handler does // not meet the documented type requirements for a WaitHandler. ASIO_WAIT_HANDLER_CHECK(WaitHandler, handler) type_check; #if defined(ASIO_ENABLE_OLD_SERVICES) return this->get_service().async_wait(this->get_implementation(), w, ASIO_MOVE_CAST(WaitHandler)(handler)); #else // defined(ASIO_ENABLE_OLD_SERVICES) async_completion init(handler); this->get_service().async_wait(this->get_implementation(), w, init.completion_handler); return init.result.get(); #endif // defined(ASIO_ENABLE_OLD_SERVICES) } #if !defined(ASIO_NO_EXTENSIONS) /// Accept a new connection. /** * This function is used to accept a new connection from a peer into the * given socket. The function call will block until a new connection has been * accepted successfully or an error occurs. * * @param peer The socket into which the new connection will be accepted. * * @throws asio::system_error Thrown on failure. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::socket socket(io_context); * acceptor.accept(socket); * @endcode */ #if defined(ASIO_ENABLE_OLD_SERVICES) template void accept(basic_socket& peer, typename enable_if::value>::type* = 0) #else // defined(ASIO_ENABLE_OLD_SERVICES) template void accept(basic_socket& peer, typename enable_if::value>::type* = 0) #endif // defined(ASIO_ENABLE_OLD_SERVICES) { asio::error_code ec; this->get_service().accept(this->get_implementation(), peer, static_cast(0), ec); asio::detail::throw_error(ec, "accept"); } /// Accept a new connection. /** * This function is used to accept a new connection from a peer into the * given socket. The function call will block until a new connection has been * accepted successfully or an error occurs. * * @param peer The socket into which the new connection will be accepted. * * @param ec Set to indicate what error occurred, if any. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::socket socket(io_context); * asio::error_code ec; * acceptor.accept(socket, ec); * if (ec) * { * // An error occurred. * } * @endcode */ #if defined(ASIO_ENABLE_OLD_SERVICES) template ASIO_SYNC_OP_VOID accept( basic_socket& peer, asio::error_code& ec, typename enable_if::value>::type* = 0) #else // defined(ASIO_ENABLE_OLD_SERVICES) template ASIO_SYNC_OP_VOID accept( basic_socket& peer, asio::error_code& ec, typename enable_if::value>::type* = 0) #endif // defined(ASIO_ENABLE_OLD_SERVICES) { this->get_service().accept(this->get_implementation(), peer, static_cast(0), ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Start an asynchronous accept. /** * This function is used to asynchronously accept a new connection into a * socket. The function call always returns immediately. * * @param peer The socket into which the new connection will be accepted. * Ownership of the peer object is retained by the caller, which must * guarantee that it is valid until the handler is called. * * @param handler The handler to be called when the accept operation * completes. Copies will be made of the handler as required. The function * signature of the handler must be: * @code void handler( * const asio::error_code& error // Result of operation. * ); @endcode * Regardless of whether the asynchronous operation completes immediately or * not, the handler will not be invoked from within this function. Invocation * of the handler will be performed in a manner equivalent to using * asio::io_context::post(). * * @par Example * @code * void accept_handler(const asio::error_code& error) * { * if (!error) * { * // Accept succeeded. * } * } * * ... * * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::socket socket(io_context); * acceptor.async_accept(socket, accept_handler); * @endcode */ #if defined(ASIO_ENABLE_OLD_SERVICES) template ASIO_INITFN_RESULT_TYPE(AcceptHandler, void (asio::error_code)) async_accept(basic_socket& peer, ASIO_MOVE_ARG(AcceptHandler) handler, typename enable_if::value>::type* = 0) #else // defined(ASIO_ENABLE_OLD_SERVICES) template ASIO_INITFN_RESULT_TYPE(AcceptHandler, void (asio::error_code)) async_accept(basic_socket& peer, ASIO_MOVE_ARG(AcceptHandler) handler, typename enable_if::value>::type* = 0) #endif // defined(ASIO_ENABLE_OLD_SERVICES) { // If you get an error on the following line it means that your handler does // not meet the documented type requirements for a AcceptHandler. ASIO_ACCEPT_HANDLER_CHECK(AcceptHandler, handler) type_check; #if defined(ASIO_ENABLE_OLD_SERVICES) return this->get_service().async_accept(this->get_implementation(), peer, static_cast(0), ASIO_MOVE_CAST(AcceptHandler)(handler)); #else // defined(ASIO_ENABLE_OLD_SERVICES) async_completion init(handler); this->get_service().async_accept(this->get_implementation(), peer, static_cast(0), init.completion_handler); return init.result.get(); #endif // defined(ASIO_ENABLE_OLD_SERVICES) } /// Accept a new connection and obtain the endpoint of the peer /** * This function is used to accept a new connection from a peer into the * given socket, and additionally provide the endpoint of the remote peer. * The function call will block until a new connection has been accepted * successfully or an error occurs. * * @param peer The socket into which the new connection will be accepted. * * @param peer_endpoint An endpoint object which will receive the endpoint of * the remote peer. * * @throws asio::system_error Thrown on failure. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::socket socket(io_context); * asio::ip::tcp::endpoint endpoint; * acceptor.accept(socket, endpoint); * @endcode */ #if defined(ASIO_ENABLE_OLD_SERVICES) template void accept(basic_socket& peer, endpoint_type& peer_endpoint) #else // defined(ASIO_ENABLE_OLD_SERVICES) void accept(basic_socket& peer, endpoint_type& peer_endpoint) #endif // defined(ASIO_ENABLE_OLD_SERVICES) { asio::error_code ec; this->get_service().accept(this->get_implementation(), peer, &peer_endpoint, ec); asio::detail::throw_error(ec, "accept"); } /// Accept a new connection and obtain the endpoint of the peer /** * This function is used to accept a new connection from a peer into the * given socket, and additionally provide the endpoint of the remote peer. * The function call will block until a new connection has been accepted * successfully or an error occurs. * * @param peer The socket into which the new connection will be accepted. * * @param peer_endpoint An endpoint object which will receive the endpoint of * the remote peer. * * @param ec Set to indicate what error occurred, if any. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::socket socket(io_context); * asio::ip::tcp::endpoint endpoint; * asio::error_code ec; * acceptor.accept(socket, endpoint, ec); * if (ec) * { * // An error occurred. * } * @endcode */ #if defined(ASIO_ENABLE_OLD_SERVICES) template ASIO_SYNC_OP_VOID accept( basic_socket& peer, endpoint_type& peer_endpoint, asio::error_code& ec) #else // defined(ASIO_ENABLE_OLD_SERVICES) ASIO_SYNC_OP_VOID accept(basic_socket& peer, endpoint_type& peer_endpoint, asio::error_code& ec) #endif // defined(ASIO_ENABLE_OLD_SERVICES) { this->get_service().accept( this->get_implementation(), peer, &peer_endpoint, ec); ASIO_SYNC_OP_VOID_RETURN(ec); } /// Start an asynchronous accept. /** * This function is used to asynchronously accept a new connection into a * socket, and additionally obtain the endpoint of the remote peer. The * function call always returns immediately. * * @param peer The socket into which the new connection will be accepted. * Ownership of the peer object is retained by the caller, which must * guarantee that it is valid until the handler is called. * * @param peer_endpoint An endpoint object into which the endpoint of the * remote peer will be written. Ownership of the peer_endpoint object is * retained by the caller, which must guarantee that it is valid until the * handler is called. * * @param handler The handler to be called when the accept operation * completes. Copies will be made of the handler as required. The function * signature of the handler must be: * @code void handler( * const asio::error_code& error // Result of operation. * ); @endcode * Regardless of whether the asynchronous operation completes immediately or * not, the handler will not be invoked from within this function. Invocation * of the handler will be performed in a manner equivalent to using * asio::io_context::post(). */ #if defined(ASIO_ENABLE_OLD_SERVICES) template ASIO_INITFN_RESULT_TYPE(AcceptHandler, void (asio::error_code)) async_accept(basic_socket& peer, endpoint_type& peer_endpoint, ASIO_MOVE_ARG(AcceptHandler) handler) #else // defined(ASIO_ENABLE_OLD_SERVICES) template ASIO_INITFN_RESULT_TYPE(AcceptHandler, void (asio::error_code)) async_accept(basic_socket& peer, endpoint_type& peer_endpoint, ASIO_MOVE_ARG(AcceptHandler) handler) #endif // defined(ASIO_ENABLE_OLD_SERVICES) { // If you get an error on the following line it means that your handler does // not meet the documented type requirements for a AcceptHandler. ASIO_ACCEPT_HANDLER_CHECK(AcceptHandler, handler) type_check; #if defined(ASIO_ENABLE_OLD_SERVICES) return this->get_service().async_accept(this->get_implementation(), peer, &peer_endpoint, ASIO_MOVE_CAST(AcceptHandler)(handler)); #else // defined(ASIO_ENABLE_OLD_SERVICES) async_completion init(handler); this->get_service().async_accept(this->get_implementation(), peer, &peer_endpoint, init.completion_handler); return init.result.get(); #endif // defined(ASIO_ENABLE_OLD_SERVICES) } #endif // !defined(ASIO_NO_EXTENSIONS) #if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) /// Accept a new connection. /** * This function is used to accept a new connection from a peer. The function * call will block until a new connection has been accepted successfully or * an error occurs. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @returns A socket object representing the newly accepted connection. * * @throws asio::system_error Thrown on failure. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::socket socket(acceptor.accept()); * @endcode */ typename Protocol::socket accept() { asio::error_code ec; typename Protocol::socket peer( this->get_service().accept( this->get_implementation(), 0, 0, ec)); asio::detail::throw_error(ec, "accept"); return peer; } /// Accept a new connection. /** * This function is used to accept a new connection from a peer. The function * call will block until a new connection has been accepted successfully or * an error occurs. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param ec Set to indicate what error occurred, if any. * * @returns On success, a socket object representing the newly accepted * connection. On error, a socket object where is_open() is false. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::socket socket(acceptor.accept(ec)); * if (ec) * { * // An error occurred. * } * @endcode */ typename Protocol::socket accept(asio::error_code& ec) { return this->get_service().accept(this->get_implementation(), 0, 0, ec); } /// Start an asynchronous accept. /** * This function is used to asynchronously accept a new connection. The * function call always returns immediately. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param handler The handler to be called when the accept operation * completes. Copies will be made of the handler as required. The function * signature of the handler must be: * @code void handler( * const asio::error_code& error, // Result of operation. * typename Protocol::socket peer // On success, the newly accepted socket. * ); @endcode * Regardless of whether the asynchronous operation completes immediately or * not, the handler will not be invoked from within this function. Invocation * of the handler will be performed in a manner equivalent to using * asio::io_context::post(). * * @par Example * @code * void accept_handler(const asio::error_code& error, * asio::ip::tcp::socket peer) * { * if (!error) * { * // Accept succeeded. * } * } * * ... * * asio::ip::tcp::acceptor acceptor(io_context); * ... * acceptor.async_accept(accept_handler); * @endcode */ template ASIO_INITFN_RESULT_TYPE(MoveAcceptHandler, void (asio::error_code, typename Protocol::socket)) async_accept(ASIO_MOVE_ARG(MoveAcceptHandler) handler) { // If you get an error on the following line it means that your handler does // not meet the documented type requirements for a MoveAcceptHandler. ASIO_MOVE_ACCEPT_HANDLER_CHECK(MoveAcceptHandler, handler, typename Protocol::socket) type_check; #if defined(ASIO_ENABLE_OLD_SERVICES) return this->get_service().async_accept( this->get_implementation(), static_cast(0), static_cast(0), ASIO_MOVE_CAST(MoveAcceptHandler)(handler)); #else // defined(ASIO_ENABLE_OLD_SERVICES) async_completion init(handler); this->get_service().async_accept( this->get_implementation(), static_cast(0), static_cast(0), init.completion_handler); return init.result.get(); #endif // defined(ASIO_ENABLE_OLD_SERVICES) } /// Accept a new connection. /** * This function is used to accept a new connection from a peer. The function * call will block until a new connection has been accepted successfully or * an error occurs. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param io_context The io_context object to be used for the newly accepted * socket. * * @returns A socket object representing the newly accepted connection. * * @throws asio::system_error Thrown on failure. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::socket socket(acceptor.accept()); * @endcode */ typename Protocol::socket accept(asio::io_context& io_context) { asio::error_code ec; typename Protocol::socket peer( this->get_service().accept(this->get_implementation(), &io_context, static_cast(0), ec)); asio::detail::throw_error(ec, "accept"); return peer; } /// Accept a new connection. /** * This function is used to accept a new connection from a peer. The function * call will block until a new connection has been accepted successfully or * an error occurs. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param io_context The io_context object to be used for the newly accepted * socket. * * @param ec Set to indicate what error occurred, if any. * * @returns On success, a socket object representing the newly accepted * connection. On error, a socket object where is_open() is false. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::socket socket(acceptor.accept(io_context2, ec)); * if (ec) * { * // An error occurred. * } * @endcode */ typename Protocol::socket accept( asio::io_context& io_context, asio::error_code& ec) { return this->get_service().accept(this->get_implementation(), &io_context, static_cast(0), ec); } /// Start an asynchronous accept. /** * This function is used to asynchronously accept a new connection. The * function call always returns immediately. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param io_context The io_context object to be used for the newly accepted * socket. * * @param handler The handler to be called when the accept operation * completes. Copies will be made of the handler as required. The function * signature of the handler must be: * @code void handler( * const asio::error_code& error, // Result of operation. * typename Protocol::socket peer // On success, the newly accepted socket. * ); @endcode * Regardless of whether the asynchronous operation completes immediately or * not, the handler will not be invoked from within this function. Invocation * of the handler will be performed in a manner equivalent to using * asio::io_context::post(). * * @par Example * @code * void accept_handler(const asio::error_code& error, * asio::ip::tcp::socket peer) * { * if (!error) * { * // Accept succeeded. * } * } * * ... * * asio::ip::tcp::acceptor acceptor(io_context); * ... * acceptor.async_accept(io_context2, accept_handler); * @endcode */ template ASIO_INITFN_RESULT_TYPE(MoveAcceptHandler, void (asio::error_code, typename Protocol::socket)) async_accept(asio::io_context& io_context, ASIO_MOVE_ARG(MoveAcceptHandler) handler) { // If you get an error on the following line it means that your handler does // not meet the documented type requirements for a MoveAcceptHandler. ASIO_MOVE_ACCEPT_HANDLER_CHECK(MoveAcceptHandler, handler, typename Protocol::socket) type_check; #if defined(ASIO_ENABLE_OLD_SERVICES) return this->get_service().async_accept(this->get_implementation(), &io_context, static_cast(0), ASIO_MOVE_CAST(MoveAcceptHandler)(handler)); #else // defined(ASIO_ENABLE_OLD_SERVICES) async_completion init(handler); this->get_service().async_accept(this->get_implementation(), &io_context, static_cast(0), init.completion_handler); return init.result.get(); #endif // defined(ASIO_ENABLE_OLD_SERVICES) } /// Accept a new connection. /** * This function is used to accept a new connection from a peer. The function * call will block until a new connection has been accepted successfully or * an error occurs. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param peer_endpoint An endpoint object into which the endpoint of the * remote peer will be written. * * @returns A socket object representing the newly accepted connection. * * @throws asio::system_error Thrown on failure. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::endpoint endpoint; * asio::ip::tcp::socket socket(acceptor.accept(endpoint)); * @endcode */ typename Protocol::socket accept(endpoint_type& peer_endpoint) { asio::error_code ec; typename Protocol::socket peer( this->get_service().accept(this->get_implementation(), static_cast(0), &peer_endpoint, ec)); asio::detail::throw_error(ec, "accept"); return peer; } /// Accept a new connection. /** * This function is used to accept a new connection from a peer. The function * call will block until a new connection has been accepted successfully or * an error occurs. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param peer_endpoint An endpoint object into which the endpoint of the * remote peer will be written. * * @param ec Set to indicate what error occurred, if any. * * @returns On success, a socket object representing the newly accepted * connection. On error, a socket object where is_open() is false. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::endpoint endpoint; * asio::ip::tcp::socket socket(acceptor.accept(endpoint, ec)); * if (ec) * { * // An error occurred. * } * @endcode */ typename Protocol::socket accept( endpoint_type& peer_endpoint, asio::error_code& ec) { return this->get_service().accept(this->get_implementation(), static_cast(0), &peer_endpoint, ec); } /// Start an asynchronous accept. /** * This function is used to asynchronously accept a new connection. The * function call always returns immediately. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param peer_endpoint An endpoint object into which the endpoint of the * remote peer will be written. Ownership of the peer_endpoint object is * retained by the caller, which must guarantee that it is valid until the * handler is called. * * @param handler The handler to be called when the accept operation * completes. Copies will be made of the handler as required. The function * signature of the handler must be: * @code void handler( * const asio::error_code& error, // Result of operation. * typename Protocol::socket peer // On success, the newly accepted socket. * ); @endcode * Regardless of whether the asynchronous operation completes immediately or * not, the handler will not be invoked from within this function. Invocation * of the handler will be performed in a manner equivalent to using * asio::io_context::post(). * * @par Example * @code * void accept_handler(const asio::error_code& error, * asio::ip::tcp::socket peer) * { * if (!error) * { * // Accept succeeded. * } * } * * ... * * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::endpoint endpoint; * acceptor.async_accept(endpoint, accept_handler); * @endcode */ template ASIO_INITFN_RESULT_TYPE(MoveAcceptHandler, void (asio::error_code, typename Protocol::socket)) async_accept(endpoint_type& peer_endpoint, ASIO_MOVE_ARG(MoveAcceptHandler) handler) { // If you get an error on the following line it means that your handler does // not meet the documented type requirements for a MoveAcceptHandler. ASIO_MOVE_ACCEPT_HANDLER_CHECK(MoveAcceptHandler, handler, typename Protocol::socket) type_check; #if defined(ASIO_ENABLE_OLD_SERVICES) return this->get_service().async_accept(this->get_implementation(), static_cast(0), &peer_endpoint, ASIO_MOVE_CAST(MoveAcceptHandler)(handler)); #else // defined(ASIO_ENABLE_OLD_SERVICES) async_completion init(handler); this->get_service().async_accept(this->get_implementation(), static_cast(0), &peer_endpoint, init.completion_handler); return init.result.get(); #endif // defined(ASIO_ENABLE_OLD_SERVICES) } /// Accept a new connection. /** * This function is used to accept a new connection from a peer. The function * call will block until a new connection has been accepted successfully or * an error occurs. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param io_context The io_context object to be used for the newly accepted * socket. * * @param peer_endpoint An endpoint object into which the endpoint of the * remote peer will be written. * * @returns A socket object representing the newly accepted connection. * * @throws asio::system_error Thrown on failure. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::endpoint endpoint; * asio::ip::tcp::socket socket( * acceptor.accept(io_context2, endpoint)); * @endcode */ typename Protocol::socket accept( asio::io_context& io_context, endpoint_type& peer_endpoint) { asio::error_code ec; typename Protocol::socket peer( this->get_service().accept(this->get_implementation(), &io_context, &peer_endpoint, ec)); asio::detail::throw_error(ec, "accept"); return peer; } /// Accept a new connection. /** * This function is used to accept a new connection from a peer. The function * call will block until a new connection has been accepted successfully or * an error occurs. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param io_context The io_context object to be used for the newly accepted * socket. * * @param peer_endpoint An endpoint object into which the endpoint of the * remote peer will be written. * * @param ec Set to indicate what error occurred, if any. * * @returns On success, a socket object representing the newly accepted * connection. On error, a socket object where is_open() is false. * * @par Example * @code * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::endpoint endpoint; * asio::ip::tcp::socket socket( * acceptor.accept(io_context2, endpoint, ec)); * if (ec) * { * // An error occurred. * } * @endcode */ typename Protocol::socket accept(asio::io_context& io_context, endpoint_type& peer_endpoint, asio::error_code& ec) { return this->get_service().accept(this->get_implementation(), &io_context, &peer_endpoint, ec); } /// Start an asynchronous accept. /** * This function is used to asynchronously accept a new connection. The * function call always returns immediately. * * This overload requires that the Protocol template parameter satisfy the * AcceptableProtocol type requirements. * * @param io_context The io_context object to be used for the newly accepted * socket. * * @param peer_endpoint An endpoint object into which the endpoint of the * remote peer will be written. Ownership of the peer_endpoint object is * retained by the caller, which must guarantee that it is valid until the * handler is called. * * @param handler The handler to be called when the accept operation * completes. Copies will be made of the handler as required. The function * signature of the handler must be: * @code void handler( * const asio::error_code& error, // Result of operation. * typename Protocol::socket peer // On success, the newly accepted socket. * ); @endcode * Regardless of whether the asynchronous operation completes immediately or * not, the handler will not be invoked from within this function. Invocation * of the handler will be performed in a manner equivalent to using * asio::io_context::post(). * * @par Example * @code * void accept_handler(const asio::error_code& error, * asio::ip::tcp::socket peer) * { * if (!error) * { * // Accept succeeded. * } * } * * ... * * asio::ip::tcp::acceptor acceptor(io_context); * ... * asio::ip::tcp::endpoint endpoint; * acceptor.async_accept(io_context2, endpoint, accept_handler); * @endcode */ template ASIO_INITFN_RESULT_TYPE(MoveAcceptHandler, void (asio::error_code, typename Protocol::socket)) async_accept(asio::io_context& io_context, endpoint_type& peer_endpoint, ASIO_MOVE_ARG(MoveAcceptHandler) handler) { // If you get an error on the following line it means that your handler does // not meet the documented type requirements for a MoveAcceptHandler. ASIO_MOVE_ACCEPT_HANDLER_CHECK(MoveAcceptHandler, handler, typename Protocol::socket) type_check; #if defined(ASIO_ENABLE_OLD_SERVICES) return this->get_service().async_accept( this->get_implementation(), &io_context, &peer_endpoint, ASIO_MOVE_CAST(MoveAcceptHandler)(handler)); #else // defined(ASIO_ENABLE_OLD_SERVICES) async_completion init(handler); this->get_service().async_accept(this->get_implementation(), &io_context, &peer_endpoint, init.completion_handler); return init.result.get(); #endif // defined(ASIO_ENABLE_OLD_SERVICES) } #endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) }; } // namespace asio #include "asio/detail/pop_options.hpp" #if !defined(ASIO_ENABLE_OLD_SERVICES) # undef ASIO_SVC_T #endif // !defined(ASIO_ENABLE_OLD_SERVICES) #endif // ASIO_BASIC_SOCKET_ACCEPTOR_HPP