120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
//
|
|
// ssl/detail/buffered_handshake_op.hpp
|
|
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
//
|
|
// Copyright (c) 2003-2021 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_BUFFERED_HANDSHAKE_OP_HPP
|
|
#define ASIO_SSL_DETAIL_BUFFERED_HANDSHAKE_OP_HPP
|
|
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
|
|
# pragma once
|
|
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
|
|
|
|
#include "asio/detail/config.hpp"
|
|
|
|
#include "asio/ssl/detail/engine.hpp"
|
|
|
|
#include "asio/detail/push_options.hpp"
|
|
|
|
namespace asio {
|
|
namespace ssl {
|
|
namespace detail {
|
|
|
|
template <typename ConstBufferSequence>
|
|
class buffered_handshake_op
|
|
{
|
|
public:
|
|
static ASIO_CONSTEXPR const char* tracking_name()
|
|
{
|
|
return "ssl::stream<>::async_buffered_handshake";
|
|
}
|
|
|
|
buffered_handshake_op(stream_base::handshake_type type,
|
|
const ConstBufferSequence& buffers)
|
|
: type_(type),
|
|
buffers_(buffers),
|
|
total_buffer_size_(asio::buffer_size(buffers_))
|
|
{
|
|
}
|
|
|
|
engine::want operator()(engine& eng,
|
|
asio::error_code& ec,
|
|
std::size_t& bytes_transferred) const
|
|
{
|
|
return this->process(eng, ec, bytes_transferred,
|
|
asio::buffer_sequence_begin(buffers_),
|
|
asio::buffer_sequence_end(buffers_));
|
|
}
|
|
|
|
template <typename Handler>
|
|
void call_handler(Handler& handler,
|
|
const asio::error_code& ec,
|
|
const std::size_t& bytes_transferred) const
|
|
{
|
|
handler(ec, bytes_transferred);
|
|
}
|
|
|
|
private:
|
|
template <typename Iterator>
|
|
engine::want process(engine& eng,
|
|
asio::error_code& ec,
|
|
std::size_t& bytes_transferred,
|
|
Iterator begin, Iterator end) const
|
|
{
|
|
Iterator iter = begin;
|
|
std::size_t accumulated_size = 0;
|
|
|
|
for (;;)
|
|
{
|
|
engine::want want = eng.handshake(type_, ec);
|
|
if (want != engine::want_input_and_retry
|
|
|| bytes_transferred == total_buffer_size_)
|
|
return want;
|
|
|
|
// Find the next buffer piece to be fed to the engine.
|
|
while (iter != end)
|
|
{
|
|
const_buffer buffer(*iter);
|
|
|
|
// Skip over any buffers which have already been consumed by the engine.
|
|
if (bytes_transferred >= accumulated_size + buffer.size())
|
|
{
|
|
accumulated_size += buffer.size();
|
|
++iter;
|
|
continue;
|
|
}
|
|
|
|
// The current buffer may have been partially consumed by the engine on
|
|
// a previous iteration. If so, adjust the buffer to point to the
|
|
// unused portion.
|
|
if (bytes_transferred > accumulated_size)
|
|
buffer = buffer + (bytes_transferred - accumulated_size);
|
|
|
|
// Pass the buffer to the engine, and update the bytes transferred to
|
|
// reflect the total number of bytes consumed so far.
|
|
bytes_transferred += buffer.size();
|
|
buffer = eng.put_input(buffer);
|
|
bytes_transferred -= buffer.size();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
stream_base::handshake_type type_;
|
|
ConstBufferSequence buffers_;
|
|
std::size_t total_buffer_size_;
|
|
};
|
|
|
|
} // namespace detail
|
|
} // namespace ssl
|
|
} // namespace asio
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#endif // ASIO_SSL_DETAIL_BUFFERED_HANDSHAKE_OP_HPP
|