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
|
/**
* @file mqtt.c Message Queue Telemetry Transport (MQTT) client
*
* Copyright (C) 2017 Creytiv.com
*/
#include <mosquitto.h>
#include <re.h>
#include <baresip.h>
#include "mqtt.h"
static char broker_host[256] = "127.0.0.1";
static uint32_t broker_port = 1883;
static struct mqtt s_mqtt;
static void fd_handler(int flags, void *arg)
{
struct mqtt *mqtt = arg;
mosquitto_loop_read(mqtt->mosq, 1);
mosquitto_loop_write(mqtt->mosq, 1);
}
/* XXX: use mosquitto_socket and fd_listen instead? */
static void tmr_handler(void *data)
{
struct mqtt *mqtt = data;
int ret;
tmr_start(&mqtt->tmr, 500, tmr_handler, mqtt);
ret = mosquitto_loop_misc(mqtt->mosq);
if (ret != MOSQ_ERR_SUCCESS) {
warning("mqtt: error in loop (%s)\n", mosquitto_strerror(ret));
}
}
/*
* This is called when the broker sends a CONNACK message
* in response to a connection.
*/
static void connect_callback(struct mosquitto *mosq, void *obj, int result)
{
struct mqtt *mqtt = obj;
int err;
(void)mqtt;
if (result != MOSQ_ERR_SUCCESS) {
warning("mqtt: could not connect to broker (%s)\n",
mosquitto_strerror(result));
return;
}
info("mqtt: connected to broker at %s:%d\n",
broker_host, broker_port);
err = mqtt_subscribe_start(mqtt);
if (err) {
warning("mqtt: subscribe_init failed (%m)\n", err);
}
}
static int module_init(void)
{
const int keepalive = 60;
int ret;
int err = 0;
tmr_init(&s_mqtt.tmr);
mosquitto_lib_init();
conf_get_str(conf_cur(), "mqtt_broker_host",
broker_host, sizeof(broker_host));
conf_get_u32(conf_cur(), "mqtt_broker_port", &broker_port);
s_mqtt.mosq = mosquitto_new("baresip", true, &s_mqtt);
if (!s_mqtt.mosq) {
warning("mqtt: failed to create client instance\n");
return ENOMEM;
}
err = mqtt_subscribe_init(&s_mqtt);
if (err)
return err;
mosquitto_connect_callback_set(s_mqtt.mosq, connect_callback);
ret = mosquitto_connect(s_mqtt.mosq, broker_host, broker_port,
keepalive);
if (ret != MOSQ_ERR_SUCCESS) {
err = ret == MOSQ_ERR_ERRNO ? errno : EIO;
warning("mqtt: failed to connect to %s:%d (%s)\n",
broker_host, broker_port,
mosquitto_strerror(ret));
return err;
}
tmr_start(&s_mqtt.tmr, 1, tmr_handler, &s_mqtt);
err = mqtt_publish_init(&s_mqtt);
if (err)
return err;
s_mqtt.fd = mosquitto_socket(s_mqtt.mosq);
err = fd_listen(s_mqtt.fd, FD_READ, fd_handler, &s_mqtt);
if (err)
return err;
info("mqtt: module loaded\n");
return err;
}
static int module_close(void)
{
fd_close(s_mqtt.fd);
mqtt_publish_close();
mqtt_subscribe_close();
tmr_cancel(&s_mqtt.tmr);
if (s_mqtt.mosq) {
mosquitto_disconnect(s_mqtt.mosq);
mosquitto_destroy(s_mqtt.mosq);
s_mqtt.mosq = NULL;
}
mosquitto_lib_cleanup();
info("mqtt: module unloaded\n");
return 0;
}
const struct mod_export DECL_EXPORTS(mqtt) = {
"mqtt",
"application",
module_init,
module_close
};
|
