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rippled/websocketpp/connection.hpp

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/*
* Copyright (c) 2013, Peter Thorson. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the WebSocket++ Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef WEBSOCKETPP_CONNECTION_HPP
#define WEBSOCKETPP_CONNECTION_HPP
#include <websocketpp/close.hpp>
#include <websocketpp/common/connection_hdl.hpp>
#include <websocketpp/common/cpp11.hpp>
#include <websocketpp/common/functional.hpp>
#include <websocketpp/error.hpp>
#include <websocketpp/frame.hpp>
#include <websocketpp/http/constants.hpp>
#include <websocketpp/logger/levels.hpp>
#include <websocketpp/processors/processor.hpp>
#include <websocketpp/transport/base/connection.hpp>
#include <iostream>
#include <vector>
#include <queue>
#include <string>
namespace websocketpp {
typedef lib::function<void(connection_hdl)> open_handler;
typedef lib::function<void(connection_hdl)> close_handler;
typedef lib::function<void(connection_hdl)> fail_handler;
typedef lib::function<void(connection_hdl)> interrupt_handler;
typedef lib::function<void(connection_hdl)> handshake_init_handler;
typedef lib::function<bool(connection_hdl,std::string)> ping_handler;
typedef lib::function<void(connection_hdl,std::string)> pong_handler;
typedef lib::function<void(connection_hdl,std::string)> pong_timeout_handler;
typedef lib::function<bool(connection_hdl)> validate_handler;
typedef lib::function<void(connection_hdl)> http_handler;
// constants related to the default WebSocket protocol versions available
#ifdef _WEBSOCKETPP_INITIALIZER_LISTS_ // simplified C++11 version
static const std::vector<int> VERSIONS_SUPPORTED = {0,7,8,13};
#else
static const int HELPER[] = {0,7,8,13};
static const std::vector<int> VERSIONS_SUPPORTED(HELPER,HELPER+4);
#endif
namespace session {
namespace state {
// externally visible session state (states based on the RFC)
enum value {
CONNECTING = 0,
OPEN = 1,
CLOSING = 2,
CLOSED = 3
};
} // namespace state
namespace fail {
namespace status {
enum value {
GOOD = 0, // no failure yet!
SYSTEM = 1, // system call returned error, check that code
WEBSOCKET = 2, // websocket close codes contain error
UNKNOWN = 3, // No failure information is avaliable
TIMEOUT_TLS = 4, // TLS handshake timed out
TIMEOUT_WS = 5 // WS handshake timed out
};
} // namespace status
} // namespace fail
namespace internal_state {
// More granular internal states. These are used for multi-threaded
// connection syncronization and preventing values that are not yet or no
// longer avaliable from being used.
enum value {
USER_INIT = 0,
TRANSPORT_INIT = 1,
READ_HTTP_REQUEST = 2,
WRITE_HTTP_REQUEST = 3,
READ_HTTP_RESPONSE = 4,
WRITE_HTTP_RESPONSE = 5,
PROCESS_HTTP_REQUEST = 6,
PROCESS_CONNECTION = 7
};
} // namespace internal_state
} // namespace session
// impliments the websocket state machine
template <typename config>
class connection
: public config::transport_type::transport_con_type
, public config::connection_base
, public lib::enable_shared_from_this< connection<config> >
{
public:
/// Type of this connection
typedef connection<config> type;
/// Type of a shared pointer to this connection
typedef lib::shared_ptr<type> ptr;
/// Type of a weak pointer to this connection
typedef lib::weak_ptr<type> weak_ptr;
/// Type of the concurrency component of this connection
typedef typename config::concurrency_type concurrency_type;
/// Type of the access logging policy
typedef typename config::alog_type alog_type;
/// Type of the error logging policy
typedef typename config::elog_type elog_type;
/// Type of the transport component of this connection
typedef typename config::transport_type::transport_con_type
transport_con_type;
/// Type of a shared pointer to the transport component of this connection
typedef typename transport_con_type::ptr transport_con_ptr;
typedef lib::function<void(ptr)> termination_handler;
typedef typename concurrency_type::scoped_lock_type scoped_lock_type;
typedef typename concurrency_type::mutex_type mutex_type;
typedef typename config::request_type request_type;
typedef typename config::response_type response_type;
typedef typename config::message_type message_type;
typedef typename message_type::ptr message_ptr;
typedef typename config::con_msg_manager_type con_msg_manager_type;
typedef typename con_msg_manager_type::ptr con_msg_manager_ptr;
/// Type of RNG
typedef processor::processor<config> processor_type;
typedef lib::shared_ptr<processor_type> processor_ptr;
// Message handler (needs to know message type)
typedef lib::function<void(connection_hdl,message_ptr)> message_handler;
// Misc Convenience Types
typedef session::internal_state::value istate_type;
explicit connection(bool is_server, const std::string& ua, alog_type& alog,
elog_type& elog, rng_type & rng)
: transport_con_type(is_server,alog,elog)
, m_user_agent(ua)
, m_state(session::state::CONNECTING)
, m_internal_state(session::internal_state::USER_INIT)
, m_msg_manager(new con_msg_manager_type())
, m_send_buffer_size(0)
, m_write_flag(false)
, m_is_server(is_server)
, m_alog(alog)
, m_elog(elog)
, m_rng(rng)
{
m_alog.write(log::alevel::devel,"connection constructor");
}
// Public Interface
///////////////////////////
// Set Handler Callbacks //
///////////////////////////
/// Set open handler
/**
* The open handler is called after the WebSocket handshake is complete and
* the connection is considered OPEN.
*
* @param h The new open_handler
*/
void set_open_handler(open_handler h) {
m_open_handler = h;
}
/// Set close handler
/**
* The close handler is called immediately after the connection is closed.
*
* @param h The new close_handler
*/
void set_close_handler(close_handler h) {
m_close_handler = h;
}
/// Set fail handler
/**
* The fail handler is called whenever the connection fails while the
* handshake is bring processed.
*
* @param h The new fail_handler
*/
void set_fail_handler(fail_handler h) {
m_fail_handler = h;
}
/// Set ping handler
/**
* The ping handler is called whenever the connection receives a ping
* control frame. The ping payload is included.
*
* The ping handler's return time controls whether or not a pong is
* sent in response to this ping. Returning false will suppress the
* return pong. If no ping handler is set a pong will be sent.
*
* @param h The new ping_handler
*/
void set_ping_handler(ping_handler h) {
m_ping_handler = h;
}
/// Set pong handler
/**
* The pong handler is called whenever the connection receives a pong
* control frame. The pong payload is included.
*
* @param h The new pong_handler
*/
void set_pong_handler(pong_handler h) {
m_pong_handler = h;
}
/// Set pong timeout handler
/**
* If the transport component being used supports timers, the pong timeout
* handler is called whenever a pong control frame is not received with the
* configured timeout period after the application sends a ping.
*
* This can be used to probe the health of the remote endpoint's WebSocket
* implimentation. This does not guarantee that the remote application
* itself is still healthy but can be a useful diagnostic.
*
* @param h The new pong_timeout_handler
*/
void set_pong_timeout_handler(pong_timeout_handler h) {
m_pong_timeout_handler = h;
}
/// Set interrupt handler
/**
* The interrupt handler is called whenever the connection is manually
* interrupted by the application.
*
* @param h The new interrupt_handler
*/
void set_interrupt_handler(interrupt_handler h) {
m_interrupt_handler = h;
}
/// Set http handler
/**
* The http handler is called after an HTTP request other than a WebSocket
* upgrade request is received. It allows a WebSocket++ server to respond
* to regular HTTP requests on the same port as it processes WebSocket
* connections. This can be useful for hosting error messages, flash
* policy files, status pages, and other simple HTTP responses. It is not
* intended to be used as a primary web server.
*
* @param h The new http_handler
*/
void set_http_handler(http_handler h) {
m_http_handler = h;
}
/// Set validate handler
/**
* The validate handler is called after a WebSocket handshake has been
* parsed but before a response is returned. It provides the application
* a chance to examine the request and determine whether or not it wants
* to accept the connection.
*
* Returning false from the validate handler will reject the connection.
* If no validate handler is present, all connections will be allowed.
*
* @param h The new validate_handler
*/
void set_validate_handler(validate_handler h) {
m_validate_handler = h;
}
/// Set message handler
/**
* The message handler is called after a new message has been received.
*
* @param h The new message_handler
*/
void set_message_handler(message_handler h) {
m_message_handler = h;
}
//////////////////////////////////
// Uncategorized public methods //
//////////////////////////////////
/// Get the size of the outgoing write buffer (in payload bytes)
/**
* Retrieves the number of bytes in the outgoing write buffer that have not
* already been dispatched to the transport layer. This represents the bytes
* that are presently cancelable without uncleanly ending the websocket
* connection
*
* This method invokes the m_write_lock mutex
*
* @return The current number of bytes in the outgoing send buffer.
*/
size_t get_buffered_amount() const;
/// DEPRECATED: use get_buffered_amount instead
size_t buffered_amount() const {return get_buffered_amount();}
////////////////////
// Action Methods //
////////////////////
/// Create a message and then add it to the outgoing send queue
/**
* Convenience method to send a message given a payload string and
* optionally an opcode. Default opcode is utf8 text.
*
* This method locks the m_write_lock mutex
*
* @param payload The payload string to generated the message with
*
* @param op The opcode to generated the message with. Default is
* frame::opcode::text
*/
lib::error_code send(const std::string& payload, frame::opcode::value op =
frame::opcode::TEXT);
/// Send a message (raw array overload)
/**
* Convenience method to send a message given a raw array and optionally an
* opcode. Default opcode is binary.
*
* This method locks the m_write_lock mutex
*
* @param payload A pointer to the array containing the bytes to send.
*
* @param len Length of the array.
*
* @param op The opcode to generated the message with. Default is
* frame::opcode::binary
*/
lib::error_code send(const void* payload, size_t len, frame::opcode::value
op = frame::opcode::BINARY);
/// Add a message to the outgoing send queue
/**
* If presented with a prepared message it is added without validation or
* framing. If presented with an unprepared message it is validated, framed,
* and then added
*
* Errors are returned via an exception
* TODO: make exception system_error rather than error_code
*
* This method invokes the m_write_lock mutex
*
* @param msg A message_ptr to the message to send.
*/
lib::error_code send(message_ptr msg);
/// Asyncronously invoke handler::on_inturrupt
/**
* Signals to the connection to asyncronously invoke the on_inturrupt
* callback for this connection's handler once it is safe to do so.
*
* When the on_inturrupt handler callback is called it will be from
* within the transport event loop with all the thread safety features
* guaranteed by the transport to regular handlers
*
* Multiple inturrupt signals can be active at once on the same connection
*
* @return An error code
*/
lib::error_code interrupt();
/// Transport inturrupt callback
void handle_interrupt();
/// Send a ping
/**
* Initiates a ping with the given payload/
*
* There is no feedback directly from ping except in cases of immediately
* detectable errors. Feedback will be provided via on_pong or
* on_pong_timeout callbacks.
*
* Ping locks the m_write_lock mutex
*
* @param payload Payload to be used for the ping
*/
void ping(const std::string& payload);
/// Send a pong
/**
* Initiates a pong with the given payload.
*
* There is no feedback from a pong once sent.
*
* Pong locks the m_write_lock mutex
*
* @param payload Payload to be used for the pong
*/
void pong(const std::string & payload);
/// exception free variant of pong
void pong(const std::string & payload, lib::error_code & ec);
/// Close the connection
/**
* Initiates the close handshake process.
*
* If close returns successfully the connection will be in the closing
* state and no additional messages may be sent. All messages sent prior
* to calling close will be written out before the connection is closed.
*
* If no reason is specified none will be sent. If no code is specified
* then no code will be sent.
*
* The handler's on_close callback will be called once the close handshake
* is complete.
*
* Reasons will be automatically truncated to the maximum length (123 bytes)
* if necessary.
*
* @param code The close code to send
*
* @param reason The close reason to send
*/
void close(const close::status::value code, const std::string & reason);
/// exception free variant of close
void close(const close::status::value code, const std::string & reason,
lib::error_code & ec);
////////////////////////////////////////////////
// Pass-through access to the uri information //
////////////////////////////////////////////////
/// Returns the secure flag from the connection URI
/**
* This value is available after the HTTP request has been fully read and
* may be called from any thread.
*
* @return Whether or not the connection URI is flagged secure.
*/
bool get_secure() const;
/// Returns the host component of the connection URI
/**
* This value is available after the HTTP request has been fully read and
* may be called from any thread.
*
* @return The host component of the connection URI
*/
const std::string& get_host() const;
/// Returns the resource component of the connection URI
/**
* This value is available after the HTTP request has been fully read and
* may be called from any thread.
*
* @return The resource component of the connection URI
*/
const std::string& get_resource() const;
/// Returns the port component of the connection URI
/**
* This value is available after the HTTP request has been fully read and
* may be called from any thread.
*
* @return The port component of the connection URI
*/
uint16_t get_port() const;
/// Sets the connection URI
/**
* This should really only be called by internal library methods unless you
* really know what you are doing.
*
* @param uri The new URI to set
*/
void set_uri(uri_ptr uri);
/////////////////////////////////////////////////////////////
// Pass-through access to the request and response objects //
/////////////////////////////////////////////////////////////
/// Set response status code and message
/**
* Sets the response status code to `code` and looks up the corresponding
* message for standard codes. Non-standard codes will be entered as Unknown
* use set_status(status_code::value,std::string) overload to set both
* values explicitly.
*
* This member function is valid only from the http() and validate() handler
* callbacks
*
* @param code Code to set
* @param msg Message to set
* @see websocketpp::http::response::set_status
*/
void set_status(http::status_code::value code);
/// Set response status code and message
/**
* Sets the response status code and message to independent custom values.
* use set_status(status_code::value) to set the code and have the standard
* message be automatically set.
*
* This member function is valid only from the http() and validate() handler
* callbacks
*
* @param code Code to set
* @param msg Message to set
* @see websocketpp::http::response::set_status
*/
void set_status(http::status_code::value code, const std::string& msg);
/// Set response body content
/**
* Set the body content of the HTTP response to the parameter string. Note
* set_body will also set the Content-Length HTTP header to the appropriate
* value. If you want the Content-Length header to be something else set it
* to something else after calling set_body
*
* This member function is valid only from the http() and validate() handler
* callbacks
*
* @param value String data to include as the body content.
* @see websocketpp::http::response::set_body
*/
void set_body(const std::string& value);
/// Append a header
/**
* If a header with this name already exists the value will be appended to
* the existing header to form a comma separated list of values. Use
* replace_header to overwrite existing values.
*
* This member function is valid only from the http() and validate() handler
* callbacks
*
* @param key Name of the header to set
* @param val Value to add
* @see replace_header
* @see websocketpp::http::parser::append_header
*/
void append_header(const std::string &key,const std::string &val);
/// Replace a header
/**
* If a header with this name already exists the old value will be replaced
* Use add_header to append to a list of existing values.
*
* This member function is valid only from the http() and validate() handler
* callbacks
*
* @param key Name of the header to set
* @param val Value to set
* @see add_header
* @see websocketpp::http::parser::replace_header
*/
void replace_header(const std::string &key,const std::string &val);
/// Remove a header
/**
* Removes a header from the response.
*
* This member function is valid only from the http() and validate() handler
* callbacks
*
* @param key The name of the header to remove
* @see websocketpp::http::parser::remove_header
*/
void remove_header(const std::string &key);
/////////////////////////////////////////////////////////////
// Pass-through access to the other connection information //
/////////////////////////////////////////////////////////////
/// Get Connection Handle
/**
* The connection handle is a token that can be shared outside the
* WebSocket++ core for the purposes of identifying a connection and
* sending it messages.
*
* @return A handle to the connection
*/
connection_hdl get_handle() const {
return m_connection_hdl;
}
/// Get whether or not this connection is part of a server or client
/**
* @return whether or not the connection is attached to a server endpoint
*/
bool is_server() const {
return m_is_server;
}
/// Return the same origin policy origin value from the opening request.
/**
* This value is available after the HTTP request has been fully read and
* may be called from any thread.
*
* @return The connection's origin value from the opening handshake.
*/
const std::string& get_origin() const;
////////////////////////////////////////////////////////////////////////
// The remaining public member functions are for internal/policy use //
// only. Do not call from application code unless you understand what //
// you are doing. //
////////////////////////////////////////////////////////////////////////
/// Set Connection Handle
/**
* The connection handle is a token that can be shared outside the
* WebSocket++ core for the purposes of identifying a connection and
* sending it messages.
*
* @param hdl A connection_hdl that the connection will use to refer
* to itself.
*/
void set_handle(connection_hdl hdl) {
m_connection_hdl = hdl;
transport_con_type::set_handle(hdl);
}
void start();
void read(size_t num_bytes);
void handle_read(const lib::error_code& ec, size_t bytes_transferred);
void write(std::string msg);
void handle_write(const lib::error_code& ec);
void handle_handshake_read(const lib::error_code& ec,
size_t bytes_transferred);
void handle_read_frame(const lib::error_code& ec,
size_t bytes_transferred);
void handle_send_http_response(const lib::error_code& ec);
/// Get array of WebSocket protocol versions that this connection supports.
const std::vector<int>& get_supported_versions() const;
/// Sets the handler for a terminating connection. Should only be used
/// internally by the endpoint class.
void set_termination_handler(termination_handler new_handler);
void terminate();
/// Checks if there are frames in the send queue and if there are sends one
/**
* TODO: unit tests
*
* This method locks the m_write_lock mutex
*/
void write_frame();
/// Process the results of a frame write operation and start the next write
/**
* TODO: unit tests
*
* This method locks the m_write_lock mutex
*
* @param terminate Whether or not to terminate the connection upon
* completion of this write.
*
* @param ec A status code from the transport layer, zero on success,
* non-zero otherwise.
*/
void handle_write_frame(bool terminate, const lib::error_code& ec);
protected:
void handle_transport_init(const lib::error_code& ec);
/// Set m_processor based on information in m_request. Set m_response
/// status and return false on error.
bool initialize_processor();
/// Perform WebSocket handshake validation of m_request using m_processor.
/// set m_response and return false on error.
bool process_handshake_request();
/// Atomically change the internal connection state.
/**
* @param req The required starting state. If the internal state does not
* match req an exception is thrown.
*
* @param dest The state to change to.
*
* @param msg The message to include in the exception thrown
*/
void atomic_state_change(istate_type req, istate_type dest,
std::string msg);
/// Atomically change the internal and external connection state.
/**
* @param ireq The required starting internal state. If the internal state
* does not match ireq an exception is thrown.
*
* @param idest The internal state to change to.
*
* @param ereq The required starting external state. If the external state
* does not match ereq an exception is thrown.
*
* @param edest The external state to change to.
*
* @param msg The message to include in the exception thrown
*/
void atomic_state_change(istate_type ireq, istate_type idest,
session::state::value ereq, session::state::value edest,
std::string msg);
/// Atomically read and compared the internal state.
/**
* @param req The state to test against. If the internal state does not
* match req an exception is thrown.
*
* @param msg The message to include in the exception thrown
*/
void atomic_state_check(istate_type req, std::string msg);
private:
/// Completes m_response, serializes it, and sends it out on the wire.
void send_http_response();
/// Alternate path for send_http_response in error conditions
void send_http_response_error();
/// Process control message
/**
*
*/
void process_control_frame(message_ptr msg);
/// Send close acknowledgement
/**
* If no arguments are present no close code/reason will be specified.
*
* Note: the close code/reason values provided here may be overrided by
* other settings (such as silent close).
*
* @param code The close code to send
*
* @param reason The close reason to send
*
* @return A status code, zero on success, non-zero otherwise
*/
lib::error_code send_close_ack(close::status::value code =
close::status::blank, const std::string &reason = "");
/// Send close frame
/**
* If no arguments are present no close code/reason will be specified.
*
* Note: the close code/reason values provided here may be overrided by
* other settings (such as silent close).
*
* The ack flag determines what to do in the case of a blank status and
* whether or not to terminate the TCP connection after sending it.
*
* @param code The close code to send
*
* @param reason The close reason to send
*
* @param ack Whether or not this is an acknowledgement close frame
*
* @return A status code, zero on success, non-zero otherwise
*/
lib::error_code send_close_frame(close::status::value code =
close::status::blank, const std::string &reason = "", bool ack = false,
bool terminal = false);
/// Get a pointer to a new WebSocket protocol processor for a given version
/**
* @param version Version number of the WebSocket protocol to get a
* processor for. Negative values indicate invalid/unknown versions and will
* always return a null ptr
*
* @return A shared_ptr to a new instance of the appropriate processor or a
* null ptr if there is no installed processor that matches the version
* number.
*/
processor_ptr get_processor(int version) const;
/// Add a message to the write queue
/**
* Adds a message to the write queue and updates any associated shared state
*
* Must be called while holding m_write_lock
*
* TODO: unit tests
*
* @param msg The message to push
*/
void write_push(message_ptr msg);
/// Pop a message from the write queue
/**
* Removes and returns a message from the write queue and updates any
* associated shared state.
*
* Must be called while holding m_write_lock
*
* TODO: unit tests
*
* @return the message_ptr at the front of the queue
*/
message_ptr write_pop();
/// Prints information about the incoming connection to the access log
/**
* Prints information about the incoming connection to the access log.
* Includes: connection type, websocket version, remote endpoint, user agent
* path, status code.
*/
void log_open_result();
// static settings
const std::string m_user_agent;
/// Pointer to the connection handle
connection_hdl m_connection_hdl;
/// Handler objects
open_handler m_open_handler;
close_handler m_close_handler;
fail_handler m_fail_handler;
ping_handler m_ping_handler;
pong_handler m_pong_handler;
pong_timeout_handler m_pong_timeout_handler;
interrupt_handler m_interrupt_handler;
http_handler m_http_handler;
validate_handler m_validate_handler;
message_handler m_message_handler;
/// External connection state
/**
* Lock: m_connection_state_lock
*/
session::state::value m_state;
/// Internal connection state
/**
* Lock: m_connection_state_lock
*/
istate_type m_internal_state;
mutable mutex_type m_connection_state_lock;
/// The lock used to protect the message queue
/**
* Serializes access to the write queue as well as shared state within the
* processor.
*/
mutex_type m_write_lock;
// connection resources
char m_buf[config::connection_read_buffer_size];
size_t m_buf_cursor;
termination_handler m_termination_handler;
con_msg_manager_ptr m_msg_manager;
/// Pointer to the processor object for this connection
/**
* The processor provides functionality that is specific to the WebSocket
* protocol version that the client has negotiated. It also contains all of
* the state necessary to encode and decode the incoming and outgoing
* WebSocket byte streams
*
* Use of the prepare_data_frame method requires lock: m_write_lock
*/
processor_ptr m_processor;
/// Queue of unsent outgoing messages
/**
* Lock: m_write_lock
*/
std::queue<message_ptr> m_send_queue;
/// Size in bytes of the outstanding payloads in the write queue
/**
* Lock: m_write_lock
*/
size_t m_send_buffer_size;
/// buffer holding the various parts of the current message being writen
/**
* Lock m_write_lock
*/
std::vector<transport::buffer> m_send_buffer;
/// True if there is currently an outstanding transport write
/**
* Lock m_write_lock
*/
bool m_write_flag;
// connection data
request_type m_request;
response_type m_response;
uri_ptr m_uri;
const bool m_is_server;
alog_type& m_alog;
elog_type& m_elog;
rng_type & m_rng;
// Close state
/// Close code that was sent on the wire by this endpoint
close::status::value m_local_close_code;
/// Close reason that was sent on the wire by this endpoint
std::string m_local_close_reason;
/// Close code that was received on the wire from the remote endpoint
close::status::value m_remote_close_code;
/// Close reason that was received on the wire from the remote endpoint
std::string m_remote_close_reason;
/// Whether or not this endpoint initiated the closing handshake.
bool m_closed_by_me;
/// ???
bool m_failed_by_me;
/// Whether or not this endpoint initiated the drop of the TCP connection
bool m_dropped_by_me;
};
} // namespace websocketpp
#include <websocketpp/impl/connection_impl.hpp>
#endif // WEBSOCKETPP_CONNECTION_HPP
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