forked from redboltz/async_mqtt
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ep_cb_mqtt_client.cpp
211 lines (202 loc) · 15 KB
/
ep_cb_mqtt_client.cpp
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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
// Copyright Takatoshi Kondo 2023
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <iostream>
#include <string>
#include <boost/asio.hpp>
#include <async_mqtt/all.hpp>
namespace as = boost::asio;
namespace am = async_mqtt;
int main(int argc, char* argv[]) {
if (argc != 3) {
std::cout << "Usage: " << argv[0] << " host port" << std::endl;
return -1;
}
am::setup_log(am::severity_level::trace);
as::io_context ioc;
as::ip::tcp::socket resolve_sock{ioc};
as::ip::tcp::resolver res{resolve_sock.get_executor()};
auto amep = am::endpoint<am::role::client, am::protocol::mqtt>::create(
am::protocol_version::v3_1_1,
ioc.get_executor()
);
std::cout << "start" << std::endl;
std::size_t count = 0;
// Resolve hostname
res.async_resolve(
argv[1],
argv[2],
[&]
(boost::system::error_code ec, as::ip::tcp::resolver::results_type eps) {
std::cout << "async_resolve:" << ec.message() << std::endl;
if (ec) return;
// Layer
// am::stream -> TCP
// Underlying TCP connect
as::async_connect(
amep->next_layer(),
eps,
[&]
(boost::system::error_code ec, as::ip::tcp::endpoint /*unused*/) {
std::cout
<< "TCP connected ec:"
<< ec.message()
<< std::endl;
if (ec) return;
// Send MQTT CONNECT
amep->send(
am::v3_1_1::connect_packet{
true, // clean_session
0x1234, // keep_alive
am::allocate_buffer("cid1"),
am::nullopt, // will
am::nullopt, // username set like am::allocate_buffer("user1"),
am::nullopt // password set like am::allocate_buffer("pass1")
},
[&]
(am::system_error const& se) {
if (se) {
std::cout << "MQTT CONNECT send error:" << se.what() << std::endl;
return;
}
// Recv MQTT CONNACK
amep->recv(
[&]
(am::packet_variant pv) {
if (pv) {
pv.visit(
am::overload {
[&](am::v3_1_1::connack_packet const& p) {
std::cout
<< "MQTT CONNACK recv"
<< " sp:" << p.session_present()
<< std::endl;
// Send MQTT SUBSCRIBE
amep->send(
am::v3_1_1::subscribe_packet{
*amep->acquire_unique_packet_id(),
{ {am::allocate_buffer("topic1"), am::qos::at_most_once} }
},
[&]
(am::system_error const& se) {
if (se) {
std::cout << "MQTT SUBSCRIBE send error:" << se.what() << std::endl;
return;
}
// Recv MQTT SUBACK
amep->recv(
[&]
(am::packet_variant pv) {
if (pv) {
pv.visit(
am::overload {
[&](am::v3_1_1::suback_packet const& p) {
std::cout
<< "MQTT SUBACK recv"
<< " pid:" << p.packet_id()
<< " entries:";
for (auto const& e : p.entries()) {
std::cout << e << " ";
}
std::cout << std::endl;
// Send MQTT PUBLISH
amep->send(
am::v3_1_1::publish_packet{
*amep->acquire_unique_packet_id(),
am::allocate_buffer("topic1"),
am::allocate_buffer("payload1"),
am::qos::at_least_once
},
[&]
(am::system_error const& se) {
if (se) {
std::cout << "MQTT PUBLISH send error:" << se.what() << std::endl;
return;
}
// Recv MQTT PUBLISH and PUBACK (order depends on broker)
auto recv_handler = std::make_shared<std::function<void(am::packet_variant pv)>>();
*recv_handler =
[&, recv_handler]
(am::packet_variant pv) {
if (pv) {
pv.visit(
am::overload {
[&](am::v3_1_1::publish_packet const& p) {
std::cout
<< "MQTT PUBLISH recv"
<< " pid:" << p.packet_id()
<< " topic:" << p.topic()
<< " payload:" << am::to_string(p.payload())
<< " qos:" << p.opts().get_qos()
<< " retain:" << p.opts().get_retain()
<< " dup:" << p.opts().get_dup()
<< std::endl;
},
[&](am::v3_1_1::puback_packet const& p) {
std::cout
<< "MQTT PUBACK recv"
<< " pid:" << p.packet_id()
<< std::endl;
},
[](auto const&) {}
}
);
if (++count < 2) {
amep->recv(*recv_handler);
}
else {
std::cout << "close" << std::endl;
amep->close([]{});
}
}
else {
std::cout
<< "MQTT recv error:"
<< pv.get<am::system_error>().what()
<< std::endl;
return;
}
};
amep->recv(*recv_handler);
}
);
},
[](auto const&) {}
}
);
}
else {
std::cout
<< "MQTT SUBACK recv error:"
<< pv.get<am::system_error>().what()
<< std::endl;
return;
}
}
);
}
);
},
[](auto const&) {}
}
);
}
else {
std::cout
<< "MQTT CONNACK recv error:"
<< pv.get<am::system_error>().what()
<< std::endl;
return;
}
}
);
}
);
}
);
}
);
ioc.run();
}