Connection.h
2.1 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
/*
* Copyright (c) TrueBrain
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#pragma once
#include "ClientImpl.h"
#include <string>
#include <map>
#include <netdb.h>
#include <thread>
#include <vector>
// Some definitions to make future cross-platform work easier.
#define SOCKET int
#define INVALID_SOCKET -1
#define closesocket close
class Packet;
class TrueMQTT::Client::Impl::Connection
{
public:
Connection(TrueMQTT::Client::Impl &impl);
~Connection();
void send(Packet &packet) const;
private:
// Implemented in Connection.cpp
void run();
void resolve();
bool tryNextAddress();
void connect(addrinfo *address);
bool connectToAny();
std::string addrinfoToString(const addrinfo *address) const;
// Implemented in Packet.cpp
ssize_t recv(char *buffer, size_t length) const;
bool recvLoop();
void sendConnect();
enum class State
{
RESOLVING,
CONNECTING,
AUTHENTICATING,
CONNECTED,
BACKOFF,
STOP,
};
TrueMQTT::Client::Impl &m_impl;
State m_state = State::RESOLVING;
std::thread m_thread; ///< Current thread used to run this connection.
addrinfo *m_host_resolved = nullptr; ///< Address info of the hostname, once looked up.
std::vector<addrinfo *> m_addresses = {}; ///< List of addresses to try to connect to.
size_t m_address_current = 0; ///< Index of the address we are currently trying to connect to.
std::chrono::steady_clock::time_point m_last_attempt = {}; ///< Time of the last attempt to connect to the current address.
std::vector<SOCKET> m_sockets = {}; ///< List of sockets we are currently trying to connect to.
std::map<SOCKET, addrinfo *> m_socket_to_address = {}; ///< Map of sockets to the address they are trying to connect to.
SOCKET m_socket = INVALID_SOCKET; ///< The socket we are currently connected with, or INVALID_SOCKET if not connected.
};