Transport protocol to transfer an IPbus buffer via TCP. More...

#include <uhal/ProtocolTCP.hpp>

Inheritance diagram for uhal::TCP< InnerProtocol, nr_buffers_per_send >:

Collaboration diagram for uhal::TCP< InnerProtocol, nr_buffers_per_send >:

Public Member Functions
	TCP (const std::string &aId, const URI &aUri)
	Constructor. More...

virtual	~TCP ()
	Destructor. More...

Private Types
typedef std::chrono::steady_clock	SteadyClock_t

Private Member Functions
	TCP (const TCP &aTCP)
	Copy Constructor This creates a new socket, dispatch queue, dispatch thread, etc. More...

TCP &	operator= (const TCP &aTCP)
	Assignment operator This reassigns the endpoint, closes the existing socket and cleans up the buffers, etc. More...

void	implementDispatch (std::shared_ptr< Buffers > aBuffers)
	Send the IPbus buffer to the target, read back the response and call the packing-protocol's validate function. More...

virtual void	Flush ()
	Concrete implementation of the synchronization function to block until all buffers have been sent, all replies received and all data validated. More...

virtual void	dispatchExceptionHandler ()
	Function which tidies up this protocol layer in the event of an exception. More...

uint32_t	getMaxSendSize ()
	Return the maximum size to be sent based on the buffer size in the target. More...

uint32_t	getMaxReplySize ()
	Return the maximum size of reply packet based on the buffer size in the target. More...

void	connect ()
	Make the TCP connection. More...

void	write ()
	Initialize performing the next TCP write operation In multi-threaded mode, this runs the ASIO async write and exits In single-threaded mode, this runs the ASIO async write and blocks. More...

void	write_callback (const boost::system::error_code &aErrorCode, std::size_t aBytesTransferred)
	Callback function which is called upon completion of the ASIO async write This, then, makes a call to read to read back the reply to what has just been sent. More...

void	read ()
	Initialize performing the next TCP read operation In multi-threaded mode, this runs the ASIO async read and exits In single-threaded mode, this runs the ASIO async read and blocks. More...

void	read_callback (const boost::system::error_code &aErrorCode, std::size_t aBytesTransferred)
	Callback function which is called upon completion of the ASIO async read This, then, checks the queue to see if there are more packets to be sent and if so, calls write. More...

void	CheckDeadline ()
	Function called by the ASIO deadline timer. More...

void	NotifyConditionalVariable (const bool &aValue)
	Function to set the value of a variable associated with a BOOST conditional-variable and then notify that conditional variable. More...

void	WaitOnConditionalVariable ()
	Function to block a thread pending a BOOST conditional-variable and its associated regular variable. More...

Private Attributes
size_t	mMaxPayloadSize
	The maximum UDP payload size (in bytes) More...

boost::asio::io_service	mIOservice
	The boost::asio::io_service used to create the connections. More...

boost::asio::ip::tcp::socket	mSocket
	A shared pointer to a boost::asio tcp socket through which the operation will be performed. More...

boost::asio::ip::tcp::resolver::iterator	mEndpoint
	A shared pointer to a boost::asio tcp endpoint - used by the delayed (open-on-first-use) connect. More...

boost::asio::deadline_timer	mDeadlineTimer
	The mechanism for providing the time-out. More...

boost::asio::io_service::work	mIOserviceWork
	Needed when multi-threading to stop the boost::asio::io_service thinking it has nothing to do and so close the socket. More...

std::thread	mDispatchThread
	The Worker thread in Multi-threaded mode. More...

std::mutex	mTransportLayerMutex
	A MutEx lock used to make sure the access functions are thread safe. More...

std::deque< std::shared_ptr< Buffers > >	mDispatchQueue
	The list of buffers still waiting to be sent. More...

std::deque< std::pair< std::vector< std::shared_ptr< Buffers > >, SteadyClock_t::time_point > >	mReplyQueue
	The list of buffers still awaiting a reply. More...

uint32_t	mPacketsInFlight
	Counter of how many writes have been sent, for which no reply has yet been received. More...

bool	mFlushStarted
	Boolean specifying whether or not the main thread is within TCP::Flush method. Its value checked by the worker thread to know whether it should wait for more packets before sending onto the TCP socket. More...

std::mutex	mConditionalVariableMutex
	A mutex for use by the conditional variable. More...

std::condition_variable	mConditionalVariable
	A conditional variable for blocking the main thread until the variable with which it is associated is set correctly. More...

bool	mFlushDone
	A variable associated with the conditional variable which specifies whether all packets have been sent and all replies have been received. More...

uint32_t	mSendByteCounter
	Variable storing "number of bytes to follow" field for the TCP chunk currently being sent. More...

uint32_t	mReplyByteCounter
	Variable used to store "number of bytes to follow" field for the next/current TCP chunk being received. More...

std::vector< std::shared_ptr< Buffers > >	mDispatchBuffers
	The buffers containing the payload for the send operation that's currently in progress. More...

std::pair< std::vector< std::shared_ptr< Buffers > >, SteadyClock_t::time_point >	mReplyBuffers
	The buffers containing the payloads for the receive operation that's currently in progress. More...

uhal::exception::exception *	mAsynchronousException
	A pointer to an exception object for passing exceptions from the worker thread to the main thread. More...

SteadyClock_t::time_point	mLastSendQueued

SteadyClock_t::time_point	mLastRecvQueued

TimeIntervalStats	mRTTStats

TimeIntervalStats	mLSTStats

TimeIntervalStats	mInterSendTimeStats

TimeIntervalStats	mInterRecvTimeStats

Detailed Description

template<typename InnerProtocol, std::size_t nr_buffers_per_send>
class uhal::TCP< InnerProtocol, nr_buffers_per_send >

Transport protocol to transfer an IPbus buffer via TCP.

Definition at line 83 of file ProtocolTCP.hpp.

Member Typedef Documentation

◆ SteadyClock_t

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

typedef std::chrono::steady_clock uhal::TCP< InnerProtocol, nr_buffers_per_send >::SteadyClock_t

private

Definition at line 184 of file ProtocolTCP.hpp.

Constructor & Destructor Documentation

◆ TCP() [1/2]

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

uhal::TCP< InnerProtocol, nr_buffers_per_send >::TCP ( const TCP< InnerProtocol, nr_buffers_per_send > & aTCP )

private

Copy Constructor This creates a new socket, dispatch queue, dispatch thread, etc.

which connects to the same target ip/port

Parameters

aTCP	a TCP-protocol object to copy

◆ TCP() [2/2]

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

uhal::TCP< InnerProtocol, nr_buffers_per_send >::TCP	(	const std::string &	aId,
		const URI &	aUri
	)

Constructor.

Parameters

aId	the unique identifier that the client will be given.
aUri	a struct containing the full URI of the target.

Definition at line 62 of file ProtocolTCP.cpp.

References uhal::TCP< InnerProtocol, nr_buffers_per_send >::mIOservice.

◆ ~TCP()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

uhal::TCP< InnerProtocol, nr_buffers_per_send >::~TCP

virtual

Destructor.

Definition at line 96 of file ProtocolTCP.cpp.

References uhal::Error, uhal::log(), uhal::Quote(), uhal::ClientInterface::returnBufferToPool(), and uhal::Type().

Member Function Documentation

◆ CheckDeadline()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::CheckDeadline

private

Function called by the ASIO deadline timer.

Definition at line 540 of file ProtocolTCP.cpp.

References uhal::Debug, uhal::log(), uhal::Quote(), and uhal::Warning.

◆ connect()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::connect

private

Make the TCP connection.

Definition at line 161 of file ProtocolTCP.cpp.

References uhal::Info, uhal::log(), and uhal::Quote().

◆ dispatchExceptionHandler()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::dispatchExceptionHandler

privatevirtual

Function which tidies up this protocol layer in the event of an exception.

Definition at line 593 of file ProtocolTCP.cpp.

References uhal::log(), uhal::Quote(), uhal::ClientInterface::returnBufferToPool(), and uhal::Warning.

◆ Flush()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::Flush

privatevirtual

Concrete implementation of the synchronization function to block until all buffers have been sent, all replies received and all data validated.

Definition at line 569 of file ProtocolTCP.cpp.

◆ getMaxReplySize()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

uint32_t uhal::TCP< InnerProtocol, nr_buffers_per_send >::getMaxReplySize

private

Return the maximum size of reply packet based on the buffer size in the target.

Returns: the maximum size of reply packet

Definition at line 154 of file ProtocolTCP.cpp.

◆ getMaxSendSize()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

uint32_t uhal::TCP< InnerProtocol, nr_buffers_per_send >::getMaxSendSize

private

Return the maximum size to be sent based on the buffer size in the target.

Returns: the maximum size to be sent

Definition at line 147 of file ProtocolTCP.cpp.

◆ implementDispatch()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::implementDispatch ( std::shared_ptr< Buffers > aBuffers )

private

Send the IPbus buffer to the target, read back the response and call the packing-protocol's validate function.

Parameters

aBuffers the buffer object wrapping the send and receive buffers that are to be transported If multithreaded, adds buffer to the dispatch queue and returns. If single-threaded, calls the dispatch-worker dispatch function directly and blocks until the response is validated.

Definition at line 121 of file ProtocolTCP.cpp.

References uhal::log(), and uhal::Type().

◆ NotifyConditionalVariable()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::NotifyConditionalVariable ( const bool & aValue )

private

Function to set the value of a variable associated with a BOOST conditional-variable and then notify that conditional variable.

Parameters

aValue a value to which to update the variable associated with a BOOST conditional-variable

Definition at line 633 of file ProtocolTCP.cpp.

◆ operator=()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

TCP & uhal::TCP< InnerProtocol, nr_buffers_per_send >::operator= ( const TCP< InnerProtocol, nr_buffers_per_send > & aTCP )

private

Assignment operator This reassigns the endpoint, closes the existing socket and cleans up the buffers, etc.

On the next call which requires the socket, it will be reopened with the new endpoint.

Parameters

aTCP	a TCP-protocol object to copy

Returns: reference to the current object to allow chaining of assignments

◆ read()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::read

private

Initialize performing the next TCP read operation In multi-threaded mode, this runs the ASIO async read and exits In single-threaded mode, this runs the ASIO async read and blocks.

Definition at line 324 of file ProtocolTCP.cpp.

References uhal::Debug, and uhal::log().

◆ read_callback()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::read_callback	(	const boost::system::error_code &	aErrorCode,
		std::size_t	aBytesTransferred
	)

private

Callback function which is called upon completion of the ASIO async read This, then, checks the queue to see if there are more packets to be sent and if so, calls write.

Parameters

aErrorCode the error code with which the ASIO operation completed

Definition at line 351 of file ProtocolTCP.cpp.

References uhal::Debug, uhal::Error, uhal::Integer(), uhal::log(), uhal::Quote(), uhal::ClientInterface::validate(), and uhal::exception::exception::what().

◆ WaitOnConditionalVariable()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::WaitOnConditionalVariable

private

Function to block a thread pending a BOOST conditional-variable and its associated regular variable.

Definition at line 643 of file ProtocolTCP.cpp.

◆ write()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::write

private

Initialize performing the next TCP write operation In multi-threaded mode, this runs the ASIO async write and exits In single-threaded mode, this runs the ASIO async write and blocks.

Definition at line 205 of file ProtocolTCP.cpp.

References uhal::Debug, uhal::Integer(), and uhal::log().

◆ write_callback()

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

void uhal::TCP< InnerProtocol, nr_buffers_per_send >::write_callback	(	const boost::system::error_code &	aErrorCode,
		std::size_t	aBytesTransferred
	)

private

Callback function which is called upon completion of the ASIO async write This, then, makes a call to read to read back the reply to what has just been sent.

Parameters

aErrorCode the error code with which the ASIO operation completed

Definition at line 248 of file ProtocolTCP.cpp.

References uhal::Integer(), uhal::log(), and uhal::Quote().

Member Data Documentation

◆ mAsynchronousException

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

uhal::exception::exception* uhal::TCP< InnerProtocol, nr_buffers_per_send >::mAsynchronousException

private

A pointer to an exception object for passing exceptions from the worker thread to the main thread.

Exceptions must always be created on the heap (i.e. using new) and deletion will be handled in the main thread

Definition at line 259 of file ProtocolTCP.hpp.

◆ mConditionalVariable

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

std::condition_variable uhal::TCP< InnerProtocol, nr_buffers_per_send >::mConditionalVariable

private

A conditional variable for blocking the main thread until the variable with which it is associated is set correctly.

Definition at line 224 of file ProtocolTCP.hpp.

◆ mConditionalVariableMutex

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

std::mutex uhal::TCP< InnerProtocol, nr_buffers_per_send >::mConditionalVariableMutex

private

A mutex for use by the conditional variable.

Definition at line 222 of file ProtocolTCP.hpp.

◆ mDeadlineTimer

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

boost::asio::deadline_timer uhal::TCP< InnerProtocol, nr_buffers_per_send >::mDeadlineTimer

private

The mechanism for providing the time-out.

Definition at line 199 of file ProtocolTCP.hpp.

◆ mDispatchBuffers

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

std::vector< std::shared_ptr< Buffers > > uhal::TCP< InnerProtocol, nr_buffers_per_send >::mDispatchBuffers

private

The buffers containing the payload for the send operation that's currently in progress.

Note: When communicating with the ControlHub it is more efficient to send as much data as possible - i.e. multiple IPbus packets - to minimise the number of TCP chunks that are unpacked at each end of the TCP connection.

Definition at line 247 of file ProtocolTCP.hpp.

◆ mDispatchQueue

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

std::deque< std::shared_ptr< Buffers > > uhal::TCP< InnerProtocol, nr_buffers_per_send >::mDispatchQueue

private

The list of buffers still waiting to be sent.

Definition at line 211 of file ProtocolTCP.hpp.

◆ mDispatchThread

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

std::thread uhal::TCP< InnerProtocol, nr_buffers_per_send >::mDispatchThread

private

The Worker thread in Multi-threaded mode.

Definition at line 205 of file ProtocolTCP.hpp.

◆ mEndpoint

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

boost::asio::ip::tcp::resolver::iterator uhal::TCP< InnerProtocol, nr_buffers_per_send >::mEndpoint

private

A shared pointer to a boost::asio tcp endpoint - used by the delayed (open-on-first-use) connect.

Definition at line 196 of file ProtocolTCP.hpp.

◆ mFlushDone

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

bool uhal::TCP< InnerProtocol, nr_buffers_per_send >::mFlushDone

private

A variable associated with the conditional variable which specifies whether all packets have been sent and all replies have been received.

Definition at line 226 of file ProtocolTCP.hpp.

◆ mFlushStarted

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

bool uhal::TCP< InnerProtocol, nr_buffers_per_send >::mFlushStarted

private

Boolean specifying whether or not the main thread is within TCP::Flush method. Its value checked by the worker thread to know whether it should wait for more packets before sending onto the TCP socket.

Definition at line 219 of file ProtocolTCP.hpp.

◆ mInterRecvTimeStats

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

TimeIntervalStats uhal::TCP< InnerProtocol, nr_buffers_per_send >::mInterRecvTimeStats

private

Definition at line 268 of file ProtocolTCP.hpp.

◆ mInterSendTimeStats

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

TimeIntervalStats uhal::TCP< InnerProtocol, nr_buffers_per_send >::mInterSendTimeStats

private

Definition at line 267 of file ProtocolTCP.hpp.

◆ mIOservice

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

boost::asio::io_service uhal::TCP< InnerProtocol, nr_buffers_per_send >::mIOservice

private

The boost::asio::io_service used to create the connections.

Definition at line 190 of file ProtocolTCP.hpp.

Referenced by uhal::TCP< InnerProtocol, nr_buffers_per_send >::TCP().

◆ mIOserviceWork

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

boost::asio::io_service::work uhal::TCP< InnerProtocol, nr_buffers_per_send >::mIOserviceWork

private

Needed when multi-threading to stop the boost::asio::io_service thinking it has nothing to do and so close the socket.

Definition at line 202 of file ProtocolTCP.hpp.

◆ mLastRecvQueued

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

SteadyClock_t::time_point uhal::TCP< InnerProtocol, nr_buffers_per_send >::mLastRecvQueued

private

Definition at line 263 of file ProtocolTCP.hpp.

◆ mLastSendQueued

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

SteadyClock_t::time_point uhal::TCP< InnerProtocol, nr_buffers_per_send >::mLastSendQueued

private

Definition at line 262 of file ProtocolTCP.hpp.

◆ mLSTStats

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

TimeIntervalStats uhal::TCP< InnerProtocol, nr_buffers_per_send >::mLSTStats

private

Definition at line 266 of file ProtocolTCP.hpp.

◆ mMaxPayloadSize

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

size_t uhal::TCP< InnerProtocol, nr_buffers_per_send >::mMaxPayloadSize

private

The maximum UDP payload size (in bytes)

Definition at line 187 of file ProtocolTCP.hpp.

◆ mPacketsInFlight

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

uint32_t uhal::TCP< InnerProtocol, nr_buffers_per_send >::mPacketsInFlight

private

Counter of how many writes have been sent, for which no reply has yet been received.

Definition at line 216 of file ProtocolTCP.hpp.

◆ mReplyBuffers

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

std::pair< std::vector< std::shared_ptr< Buffers > >, SteadyClock_t::time_point > uhal::TCP< InnerProtocol, nr_buffers_per_send >::mReplyBuffers

private

The buffers containing the payloads for the receive operation that's currently in progress.

Note: When communicating with the ControlHub it is more efficient to send as much data as possible - i.e. multiple IPbus packets - to minimise the number of TCP chunks that are unpacked at each end of the TCP connection.

Definition at line 253 of file ProtocolTCP.hpp.

◆ mReplyByteCounter

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

uint32_t uhal::TCP< InnerProtocol, nr_buffers_per_send >::mReplyByteCounter

private

Variable used to store "number of bytes to follow" field for the next/current TCP chunk being received.

Note: Having this field in the TCP stream increases the efficiency (specifically, throughput) of receiving data, since uHAL can wait for the whole chunk to arrive before unpacking it.; I.e. with this field in the TCP stream, uHAL can handle more data in each TCP receive call, and therefore doesn't have to call the TCP receive function so often.

Definition at line 241 of file ProtocolTCP.hpp.

◆ mReplyQueue

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

std::deque< std::pair<std::vector< std::shared_ptr< Buffers > >, SteadyClock_t::time_point> > uhal::TCP< InnerProtocol, nr_buffers_per_send >::mReplyQueue

private

The list of buffers still awaiting a reply.

Definition at line 213 of file ProtocolTCP.hpp.

◆ mRTTStats

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

TimeIntervalStats uhal::TCP< InnerProtocol, nr_buffers_per_send >::mRTTStats

private

Definition at line 265 of file ProtocolTCP.hpp.

◆ mSendByteCounter

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

uint32_t uhal::TCP< InnerProtocol, nr_buffers_per_send >::mSendByteCounter

private

Variable storing "number of bytes to follow" field for the TCP chunk currently being sent.

Note: Having this field in the TCP stream increases the efficiency (specifically, throughput) of sending data over the TCP stream, since the server application can wait for the whole chunk to arrive before unpacking it.; I.e. with this field in the TCP stream, the server (e.g. ControlHub) can handle more data in each TCP receive call, and therefore doesn't have to call TCP receive function so often.; Similarly uHAL handles more data in each TCP send call, and therefore doesn't have to call the TCP send function so often.

Definition at line 234 of file ProtocolTCP.hpp.

◆ mSocket

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

boost::asio::ip::tcp::socket uhal::TCP< InnerProtocol, nr_buffers_per_send >::mSocket

private

A shared pointer to a boost::asio tcp socket through which the operation will be performed.

Definition at line 193 of file ProtocolTCP.hpp.

◆ mTransportLayerMutex

template<typename InnerProtocol , std::size_t nr_buffers_per_send>

std::mutex uhal::TCP< InnerProtocol, nr_buffers_per_send >::mTransportLayerMutex

private

A MutEx lock used to make sure the access functions are thread safe.

Definition at line 208 of file ProtocolTCP.hpp.

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

uhal/include/uhal/ProtocolTCP.hpp
uhal/src/common/ProtocolTCP.cpp

Public Member Functions

Private Types

Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ SteadyClock_t

Constructor & Destructor Documentation

◆ TCP() [1/2]

◆ TCP() [2/2]

◆ ~TCP()

Member Function Documentation

◆ CheckDeadline()

◆ connect()

◆ dispatchExceptionHandler()

◆ Flush()

◆ getMaxReplySize()

◆ getMaxSendSize()

◆ implementDispatch()

◆ NotifyConditionalVariable()

◆ operator=()

◆ read()

◆ read_callback()

◆ WaitOnConditionalVariable()

◆ write()

◆ write_callback()

Member Data Documentation

◆ mAsynchronousException

◆ mConditionalVariable

◆ mConditionalVariableMutex

◆ mDeadlineTimer

◆ mDispatchBuffers

◆ mDispatchQueue

◆ mDispatchThread

◆ mEndpoint

◆ mFlushDone

◆ mFlushStarted

◆ mInterRecvTimeStats

◆ mInterSendTimeStats

◆ mIOservice

◆ mIOserviceWork

◆ mLastRecvQueued

◆ mLastSendQueued

◆ mLSTStats

◆ mMaxPayloadSize

◆ mPacketsInFlight

◆ mReplyBuffers

◆ mReplyByteCounter

◆ mReplyQueue

◆ mRTTStats

◆ mSendByteCounter

◆ mSocket

◆ mTransportLayerMutex