Botan::TLS::detail::AsyncHandshakeOperation< Handler, Stream, Allocator > Class Template Reference

#include <asio_async_ops.h>

Inheritance diagram for Botan::TLS::detail::AsyncHandshakeOperation< Handler, Stream, Allocator >:

Public Types
using	allocator_type = boost::asio::associated_allocator_t< Handler, Allocator >
using	executor_type = boost::asio::associated_executor_t< Handler, Stream::executor_type >

Public Member Functions
template<class HandlerT >
	AsyncHandshakeOperation (HandlerT &&handler, Stream &stream, const boost::system::error_code &ec={})
	AsyncHandshakeOperation (AsyncHandshakeOperation &&)=default
allocator_type	get_allocator () const noexcept
executor_type	get_executor () const noexcept
void	operator() (boost::system::error_code ec, std::size_t bytesTransferred, bool isContinuation=true)

Protected Member Functions
void	complete_now (Args &&...args)

Protected Attributes
Handler	m_handler
boost::asio::executor_work_guard< Stream::executor_type >	m_work_guard_1

Detailed Description

template<class Handler, class Stream, class Allocator = std::allocator<void>>
class Botan::TLS::detail::AsyncHandshakeOperation< Handler, Stream, Allocator >

Definition at line 267 of file asio_async_ops.h.

Member Typedef Documentation

using Botan::TLS::detail::AsyncBase< Handler, Stream::executor_type , Allocator >::allocator_type = boost::asio::associated_allocator_t<Handler, Allocator>

inherited

Definition at line 71 of file asio_async_ops.h.

using Botan::TLS::detail::AsyncBase< Handler, Stream::executor_type , Allocator >::executor_type = boost::asio::associated_executor_t<Handler, Stream::executor_type >

inherited

Definition at line 72 of file asio_async_ops.h.

Constructor & Destructor Documentation

template<class Handler , class Stream , class Allocator = std::allocator<void>>

template<class HandlerT >

Botan::TLS::detail::AsyncHandshakeOperation< Handler, Stream, Allocator >::AsyncHandshakeOperation ( HandlerT &&  handler, Stream &  stream, const boost::system::error_code &  ec = {}  )

inline

Construct and invoke an AsyncHandshakeOperation.

Parameters

handler	Handler function to be called upon completion.
stream	The stream from which the data will be read
ec	Optional error code; used to report an error to the handler function.

Definition at line 278 of file asio_async_ops.h.

                                           {})
         : AsyncBase<Handler, typename Stream::executor_type, Allocator>(
              std::forward<HandlerT>(handler),
              stream.get_executor())
         , m_stream(stream)
         {
         this->operator()(ec, std::size_t(0), false);
         }

template<class Handler , class Stream , class Allocator = std::allocator<void>>

Botan::TLS::detail::AsyncHandshakeOperation< Handler, Stream, Allocator >::AsyncHandshakeOperation ( AsyncHandshakeOperation< Handler, Stream, Allocator > &&  )

default

Member Function Documentation

void Botan::TLS::detail::AsyncBase< Handler, Stream::executor_type , Allocator >::complete_now ( Args &&...  args )

inlineprotectedinherited

Call the completion handler.

This function should only be called after an intermediate initiating function has been called.

Parameters

args	Arguments forwarded to the completion handler function.

Definition at line 100 of file asio_async_ops.h.

References Botan::TLS::detail::AsyncBase< Handler, Executor1, Allocator >::m_handler, and Botan::TLS::detail::AsyncBase< Handler, Executor1, Allocator >::m_work_guard_1.

Referenced by Botan::TLS::detail::AsyncReadOperation< Handler, Stream, MutableBufferSequence, Allocator >::operator()(), Botan::TLS::detail::AsyncWriteOperation< Handler, Stream, Allocator >::operator()(), and Botan::TLS::detail::AsyncHandshakeOperation< Handler, Stream, Allocator >::operator()().

         {
         m_work_guard_1.reset();
         m_handler(std::forward<Args>(args)...);
         }

allocator_type Botan::TLS::detail::AsyncBase< Handler, Stream::executor_type , Allocator >::get_allocator ( ) const

inlinenoexceptinherited

Definition at line 74 of file asio_async_ops.h.

References Botan::TLS::detail::AsyncBase< Handler, Executor1, Allocator >::m_handler.

         {
         return boost::asio::get_associated_allocator(m_handler);
         }

executor_type Botan::TLS::detail::AsyncBase< Handler, Stream::executor_type , Allocator >::get_executor ( ) const

inlinenoexceptinherited

Definition at line 79 of file asio_async_ops.h.

References Botan::TLS::detail::AsyncBase< Handler, Executor1, Allocator >::m_handler, and Botan::TLS::detail::AsyncBase< Handler, Executor1, Allocator >::m_work_guard_1.

         {
         return boost::asio::get_associated_executor(m_handler, m_work_guard_1.get_executor());
         }

template<class Handler , class Stream , class Allocator = std::allocator<void>>

void Botan::TLS::detail::AsyncHandshakeOperation< Handler, Stream, Allocator >::operator() ( boost::system::error_code  ec, std::size_t  bytesTransferred, bool  isContinuation = true  )

inline

Definition at line 292 of file asio_async_ops.h.

References Botan::TLS::detail::AsyncBase< Handler, Stream::executor_type, Allocator >::complete_now(), Botan::Exception::error_type(), Botan::TLS::Stream< StreamLayer, ChannelT >::has_data_to_send(), Botan::TLS::Stream< StreamLayer, ChannelT >::input_buffer(), Botan::TLS::Stream< StreamLayer, ChannelT >::native_handle(), Botan::TLS::Stream< StreamLayer, ChannelT >::next_layer(), Botan::TLS::TLS_Exception::type(), and Botan::Unknown.

         {
         reenter(this)
            {
            if(bytesTransferred > 0 && !ec)
               {
               // Provide encrypted TLS data received from the network to TLS::Channel for decryption
               boost::asio::const_buffer read_buffer {m_stream.input_buffer().data(), bytesTransferred};
               try
                  {
                  m_stream.native_handle()->received_data(
                     static_cast<const uint8_t*>(read_buffer.data()), read_buffer.size()
                  );
                  }
               catch(const TLS_Exception& e)
                  {
                  ec = e.type();
                  }
               catch(const Botan::Exception& e)
                  {
                  ec = e.error_type();
                  }
               catch(...)
                  {
                  ec = Botan::ErrorType::Unknown;
                  }
               }

            if(m_stream.has_data_to_send() && !ec)
               {
               // Write encrypted TLS data provided by the TLS::Channel on the wire

               // Note: we construct `AsyncWriteOperation` with 0 as its last parameter (`plainBytesTransferred`). This
               // operation will eventually call `*this` as its own handler, passing the 0 back to this call operator.
               // This is necessary because the check of `bytesTransferred > 0` assumes that `bytesTransferred` bytes
               // were just read and are available in input_buffer for further processing.
               AsyncWriteOperation<
               AsyncHandshakeOperation<typename std::decay<Handler>::type, Stream, Allocator>,
                                       Stream,
                                       Allocator>
                                       op{std::move(*this), m_stream, 0};
               return;
               }

            if(!m_stream.native_handle()->is_active() && !ec)
               {
               // Read more encrypted TLS data from the network
               m_stream.next_layer().async_read_some(m_stream.input_buffer(), std::move(*this));
               return;
               }

            if(!isContinuation)
               {
               // Make sure the handler is not called without an intermediate initiating function.
               // "Reading" into a zero-byte buffer will complete immediately.
               m_ec = ec;
               yield m_stream.next_layer().async_read_some(boost::asio::mutable_buffer(), std::move(*this));
               ec = m_ec;
               }

            this->complete_now(ec);
            }
         }

Member Data Documentation

Handler Botan::TLS::detail::AsyncBase< Handler, Stream::executor_type , Allocator >::m_handler

protectedinherited

Definition at line 106 of file asio_async_ops.h.

boost::asio::executor_work_guard<Stream::executor_type > Botan::TLS::detail::AsyncBase< Handler, Stream::executor_type , Allocator >::m_work_guard_1

protectedinherited

Definition at line 107 of file asio_async_ops.h.

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The documentation for this class was generated from the following file:

• src/lib/tls/asio/asio_async_ops.h