dpp::ssl_client Class Reference

Implements a simple non-blocking SSL stream client. More...

#include <sslclient.h>

Inheritance diagram for dpp::ssl_client:

Collaboration diagram for dpp::ssl_client:

Public Member Functions
uint64_t	get_bytes_out ()
	Get the bytes out objectGet total bytes sent. More...
uint64_t	get_bytes_in ()
	Get total bytes received. More...
std::string	get_cipher ()
	Get SSL cipher name. More...
	ssl_client (const std::string &_hostname, const std::string &_port="443", bool plaintext_downgrade=false, bool reuse=false)
	Connect to a specified host and port. Throws std::runtime_error on fatal error. More...
void	read_loop ()
	Nonblocking I/O loop. More...
virtual	~ssl_client ()
	Destroy the ssl_client object. More...
virtual bool	handle_buffer (std::string &buffer)
	Handle input from the input buffer. This function will be called until all data in the buffer has been processed and the buffer is empty. More...
void	socket_write (const std::string_view data)
	Write to the output buffer. More...
virtual void	close ()
	Close socket connection. More...
virtual void	log (dpp::loglevel severity, const std::string &msg) const
	Log a message. More...

Public Attributes
socket_callback_t	custom_readable_fd
	Attaching an additional file descriptor to this function will send notifications when there is data to read. More...
socket_callback_t	custom_writeable_fd
	Attaching an additional file descriptor to this function will send notifications when you are able to write to the socket. More...
socket_notification_t	custom_readable_ready
	This event will be called when you can read from the custom fd. More...
socket_notification_t	custom_writeable_ready
	This event will be called when you can write to a custom fd. More...
bool	keepalive
	True if we are keeping the connection alive after it has finished. More...

Protected Member Functions
virtual void	one_second_timer ()
	Called every second. More...
virtual void	connect ()
	Start SSL connection and connect to TCP endpoint. More...

Protected Attributes
std::string	buffer
	Input buffer received from socket. More...
std::string	obuffer
	Output buffer for sending to socket. More...
bool	nonblocking
	True if in nonblocking mode. The socket switches to nonblocking mode once ReadLoop is called. More...
dpp::socket	sfd
	Raw file descriptor of connection. More...
openssl_connection *	ssl
	Openssl opaque contexts. More...
std::string	cipher
	SSL cipher in use. More...
time_t	last_tick
	For timers. More...
std::string	hostname
	Hostname connected to. More...
std::string	port
	Port connected to. More...
uint64_t	bytes_out
	Bytes out. More...
uint64_t	bytes_in
	Bytes in. More...
bool	plaintext
	True for a plain text connection. More...
bool	make_new
	True if we are establishing a new connection, false if otherwise. More...

Detailed Description

Implements a simple non-blocking SSL stream client.

Note

although the design is non-blocking the run() method will execute in an infinite loop until the socket disconnects. This is intended to be run within a std::thread.

Constructor & Destructor Documentation

ssl_client()

dpp::ssl_client::ssl_client	(	const std::string &	_hostname,
		const std::string &	_port = "443",
		bool	plaintext_downgrade = false,
		bool	reuse = false
	)

Connect to a specified host and port. Throws std::runtime_error on fatal error.

Parameters

_hostname	The hostname to connect to
_port	the Port number to connect to
plaintext_downgrade	Set to true to connect using plaintext only, without initialising SSL.
reuse	Attempt to reuse previous connections for this hostname and port, if available Note that no Discord endpoints will function when downgraded. This option is provided only for connection to non-Discord addresses such as within dpp::cluster::request().

Exceptions

dpp::exception

Failed to initialise connection

~ssl_client()

virtual dpp::ssl_client::~ssl_client ( )

virtual

Destroy the ssl_client object.

Member Function Documentation

close()

virtual void dpp::ssl_client::close ( )

virtual

Close socket connection.

Reimplemented in dpp::https_client, and dpp::websocket_client.

connect()

virtual void dpp::ssl_client::connect ( )

protectedvirtual

Start SSL connection and connect to TCP endpoint.

Exceptions

dpp::exception

Failed to initialise connection

Reimplemented in dpp::https_client, and dpp::websocket_client.

get_bytes_in()

uint64_t dpp::ssl_client::get_bytes_in

(

)

Get total bytes received.

Returns

uint64_t bytes received

get_bytes_out()

uint64_t dpp::ssl_client::get_bytes_out

(

)

Get the bytes out objectGet total bytes sent.

Returns

uint64_t bytes sent

get_cipher()

std::string dpp::ssl_client::get_cipher

(

)

Get SSL cipher name.

Returns

std::string ssl cipher name

handle_buffer()

virtual bool dpp::ssl_client::handle_buffer ( std::string &  buffer )

virtual

Handle input from the input buffer. This function will be called until all data in the buffer has been processed and the buffer is empty.

Parameters

buffer

the buffer content. Will be modified removing any processed front elements

Returns

bool True if the socket should remain connected

Reimplemented in dpp::https_client, and dpp::websocket_client.

log()

virtual void dpp::ssl_client::log ( dpp::loglevel  severity, const std::string &  msg  ) const

virtual

Log a message.

Parameters

severity	severity of log message
msg	Log message to send

Reimplemented in dpp::discord_client, and dpp::discord_voice_client.

one_second_timer()

virtual void dpp::ssl_client::one_second_timer ( )

protectedvirtual

Called every second.

Reimplemented in dpp::discord_client, dpp::discord_voice_client, dpp::https_client, and dpp::websocket_client.

read_loop()

void dpp::ssl_client::read_loop

(

)

Nonblocking I/O loop.

Exceptions

std::exception

Any std::exception (or derivative) thrown from read_loop() causes reconnection of the shard

socket_write()

void dpp::ssl_client::socket_write

(

const std::string_view

data

)

Write to the output buffer.

Parameters

data	Data to be written to the buffer.

Note

The data may not be written immediately and may be written at a later time to the socket.

Member Data Documentation

buffer

std::string dpp::ssl_client::buffer

protected

Input buffer received from socket.

bytes_in

uint64_t dpp::ssl_client::bytes_in

protected

Bytes in.

bytes_out

uint64_t dpp::ssl_client::bytes_out

protected

Bytes out.

cipher

std::string dpp::ssl_client::cipher

protected

SSL cipher in use.

custom_readable_fd

socket_callback_t dpp::ssl_client::custom_readable_fd

Attaching an additional file descriptor to this function will send notifications when there is data to read.

NOTE: Only hook this if you NEED it as it can increase CPU usage of the thread! Returning -1 means that you don't want to be notified.

custom_readable_ready

socket_notification_t dpp::ssl_client::custom_readable_ready

This event will be called when you can read from the custom fd.

custom_writeable_fd

socket_callback_t dpp::ssl_client::custom_writeable_fd

Attaching an additional file descriptor to this function will send notifications when you are able to write to the socket.

NOTE: Only hook this if you NEED it as it can increase CPU usage of the thread! You should toggle this to -1 when you do not have anything to write otherwise it'll keep triggering repeatedly (it is level triggered).

custom_writeable_ready

socket_notification_t dpp::ssl_client::custom_writeable_ready

This event will be called when you can write to a custom fd.

hostname

std::string dpp::ssl_client::hostname

protected

Hostname connected to.

keepalive

bool dpp::ssl_client::keepalive

True if we are keeping the connection alive after it has finished.

last_tick

time_t dpp::ssl_client::last_tick

protected

For timers.

make_new

bool dpp::ssl_client::make_new

protected

True if we are establishing a new connection, false if otherwise.

nonblocking

bool dpp::ssl_client::nonblocking

protected

True if in nonblocking mode. The socket switches to nonblocking mode once ReadLoop is called.

obuffer

std::string dpp::ssl_client::obuffer

protected

Output buffer for sending to socket.

plaintext

bool dpp::ssl_client::plaintext

protected

True for a plain text connection.

port

std::string dpp::ssl_client::port

protected

Port connected to.

sfd

dpp::socket dpp::ssl_client::sfd

protected

Raw file descriptor of connection.

ssl

openssl_connection* dpp::ssl_client::ssl

protected

Openssl opaque contexts.