| // |
| // ssl/detail/stream_core.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2015 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_SSL_DETAIL_STREAM_CORE_HPP |
| #define ASIO_SSL_DETAIL_STREAM_CORE_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| |
| #if defined(ASIO_HAS_BOOST_DATE_TIME) |
| # include "asio/deadline_timer.hpp" |
| #else // defined(ASIO_HAS_BOOST_DATE_TIME) |
| # include "asio/steady_timer.hpp" |
| #endif // defined(ASIO_HAS_BOOST_DATE_TIME) |
| #include "asio/ssl/detail/engine.hpp" |
| #include "asio/buffer.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace ssl { |
| namespace detail { |
| |
| struct stream_core |
| { |
| // According to the OpenSSL documentation, this is the buffer size that is |
| // sufficient to hold the largest possible TLS record. |
| enum { max_tls_record_size = 17 * 1024 }; |
| |
| stream_core(SSL_CTX* context, asio::io_context& io_context) |
| : engine_(context), |
| pending_read_(io_context), |
| pending_write_(io_context), |
| output_buffer_space_(max_tls_record_size), |
| output_buffer_(asio::buffer(output_buffer_space_)), |
| input_buffer_space_(max_tls_record_size), |
| input_buffer_(asio::buffer(input_buffer_space_)) |
| { |
| pending_read_.expires_at(neg_infin()); |
| pending_write_.expires_at(neg_infin()); |
| } |
| |
| ~stream_core() |
| { |
| } |
| |
| // The SSL engine. |
| engine engine_; |
| |
| #if defined(ASIO_HAS_BOOST_DATE_TIME) |
| // Timer used for storing queued read operations. |
| asio::deadline_timer pending_read_; |
| |
| // Timer used for storing queued write operations. |
| asio::deadline_timer pending_write_; |
| |
| // Helper function for obtaining a time value that always fires. |
| static asio::deadline_timer::time_type neg_infin() |
| { |
| return boost::posix_time::neg_infin; |
| } |
| |
| // Helper function for obtaining a time value that never fires. |
| static asio::deadline_timer::time_type pos_infin() |
| { |
| return boost::posix_time::pos_infin; |
| } |
| |
| // Helper function to get a timer's expiry time. |
| static asio::deadline_timer::time_type expiry( |
| const asio::deadline_timer& timer) |
| { |
| return timer.expires_at(); |
| } |
| #else // defined(ASIO_HAS_BOOST_DATE_TIME) |
| // Timer used for storing queued read operations. |
| asio::steady_timer pending_read_; |
| |
| // Timer used for storing queued write operations. |
| asio::steady_timer pending_write_; |
| |
| // Helper function for obtaining a time value that always fires. |
| static asio::steady_timer::time_point neg_infin() |
| { |
| return (asio::steady_timer::time_point::min)(); |
| } |
| |
| // Helper function for obtaining a time value that never fires. |
| static asio::steady_timer::time_point pos_infin() |
| { |
| return (asio::steady_timer::time_point::max)(); |
| } |
| |
| // Helper function to get a timer's expiry time. |
| static asio::steady_timer::time_point expiry( |
| const asio::steady_timer& timer) |
| { |
| return timer.expiry(); |
| } |
| #endif // defined(ASIO_HAS_BOOST_DATE_TIME) |
| |
| // Buffer space used to prepare output intended for the transport. |
| std::vector<unsigned char> output_buffer_space_; |
| |
| // A buffer that may be used to prepare output intended for the transport. |
| const asio::mutable_buffer output_buffer_; |
| |
| // Buffer space used to read input intended for the engine. |
| std::vector<unsigned char> input_buffer_space_; |
| |
| // A buffer that may be used to read input intended for the engine. |
| const asio::mutable_buffer input_buffer_; |
| |
| // The buffer pointing to the engine's unconsumed input. |
| asio::const_buffer input_; |
| }; |
| |
| } // namespace detail |
| } // namespace ssl |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_SSL_DETAIL_STREAM_CORE_HPP |