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+//
+// ssl/detail/stream_core.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2014 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 BOOST_ASIO_SSL_DETAIL_STREAM_CORE_HPP
+#define BOOST_ASIO_SSL_DETAIL_STREAM_CORE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if !defined(BOOST_ASIO_ENABLE_OLD_SSL)
+# if defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
+# include <boost/asio/deadline_timer.hpp>
+# else // defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
+# include <boost/asio/steady_timer.hpp>
+# endif // defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
+# include <boost/asio/ssl/detail/engine.hpp>
+# include <boost/asio/buffer.hpp>
+#endif // !defined(BOOST_ASIO_ENABLE_OLD_SSL)
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace ssl {
+namespace detail {
+
+#if !defined(BOOST_ASIO_ENABLE_OLD_SSL)
+
+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, boost::asio::io_service& io_service)
+ : engine_(context),
+ pending_read_(io_service),
+ pending_write_(io_service),
+ output_buffer_space_(max_tls_record_size),
+ output_buffer_(boost::asio::buffer(output_buffer_space_)),
+ input_buffer_space_(max_tls_record_size),
+ input_buffer_(boost::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(BOOST_ASIO_HAS_BOOST_DATE_TIME)
+ // Timer used for storing queued read operations.
+ boost::asio::deadline_timer pending_read_;
+
+ // Timer used for storing queued write operations.
+ boost::asio::deadline_timer pending_write_;
+
+ // Helper function for obtaining a time value that always fires.
+ static boost::asio::deadline_timer::time_type neg_infin()
+ {
+ return boost::posix_time::neg_infin;
+ }
+
+ // Helper function for obtaining a time value that never fires.
+ static boost::asio::deadline_timer::time_type pos_infin()
+ {
+ return boost::posix_time::pos_infin;
+ }
+#else // defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
+ // Timer used for storing queued read operations.
+ boost::asio::steady_timer pending_read_;
+
+ // Timer used for storing queued write operations.
+ boost::asio::steady_timer pending_write_;
+
+ // Helper function for obtaining a time value that always fires.
+ static boost::asio::steady_timer::time_point neg_infin()
+ {
+ return (boost::asio::steady_timer::time_point::min)();
+ }
+
+ // Helper function for obtaining a time value that never fires.
+ static boost::asio::steady_timer::time_point pos_infin()
+ {
+ return (boost::asio::steady_timer::time_point::max)();
+ }
+#endif // defined(BOOST_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 boost::asio::mutable_buffers_1 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 boost::asio::mutable_buffers_1 input_buffer_;
+
+ // The buffer pointing to the engine's unconsumed input.
+ boost::asio::const_buffer input_;
+};
+
+#endif // !defined(BOOST_ASIO_ENABLE_OLD_SSL)
+
+} // namespace detail
+} // namespace ssl
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_SSL_DETAIL_STREAM_CORE_HPP