summaryrefslogtreecommitdiffstats
path: root/src/aclk/mqtt_websockets/mqtt_ng.h
blob: 4b0584d58cfec949bf8ca3d5684768da5202b075 (plain)
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
// Copyright: SPDX-License-Identifier:  GPL-3.0-only

#include <stdint.h>
#include <sys/types.h>
#include <time.h>

#include "c-rbuf/cringbuffer.h"
#include "common_public.h"

#define MQTT_NG_MSGGEN_OK         0
// MQTT_NG_MSGGEN_USER_ERROR means parameters given to this function
// do not make sense or are out of MQTT specs
#define MQTT_NG_MSGGEN_USER_ERROR  1
#define MQTT_NG_MSGGEN_BUFFER_OOM  2
#define MQTT_NG_MSGGEN_MSG_TOO_BIG 3

struct mqtt_ng_client;

/* Converts integer to MQTT Variable Byte Integer as per 1.5.5 of MQTT 5 specs
 * @param input value to be converted
 * @param output pointer to memory where output will be written to. Must allow up to 4 bytes to be written.
 * @return number of bytes written to output or <= 0 if error in which case contents of output are undefined
 */
int uint32_to_mqtt_vbi(uint32_t input, unsigned char *output);

struct mqtt_lwt_properties {
    char *will_topic;
    free_fnc_t will_topic_free;

    void *will_message;
    free_fnc_t will_message_free;
    size_t will_message_size;

    int will_qos;
    int will_retain;
};

struct mqtt_auth_properties {
    char *client_id;
    free_fnc_t client_id_free;
    char *username;
    free_fnc_t username_free;
    char *password;
    free_fnc_t password_free;
};

int mqtt_ng_connect(struct mqtt_ng_client *client,
                    struct mqtt_auth_properties *auth,
                    struct mqtt_lwt_properties *lwt,
                    uint8_t clean_start,
                    uint16_t keep_alive);

int mqtt_ng_publish(struct mqtt_ng_client *client,
                    char *topic,
                    free_fnc_t topic_free,
                    void *msg,
                    free_fnc_t msg_free,
                    size_t msg_len,
                    uint8_t publish_flags,
                    uint16_t *packet_id);

struct mqtt_sub {
    char *topic;
    free_fnc_t topic_free;
    uint8_t options;
};

int mqtt_ng_subscribe(struct mqtt_ng_client *client, struct mqtt_sub *subscriptions, size_t subscription_count);

int mqtt_ng_ping(struct mqtt_ng_client *client);

typedef ssize_t (*mqtt_ng_send_fnc_t)(void *user_ctx, const void* buf, size_t len);

struct mqtt_ng_init {
    mqtt_wss_log_ctx_t log;
    rbuf_t data_in;
    mqtt_ng_send_fnc_t data_out_fnc;
    void *user_ctx;

    void (*puback_callback)(uint16_t packet_id);
    void (*connack_callback)(void* user_ctx, int connack_reply);
    void (*msg_callback)(const char *topic, const void *msg, size_t msglen, int qos);
};

struct mqtt_ng_client *mqtt_ng_init(struct mqtt_ng_init *settings);

void mqtt_ng_destroy(struct mqtt_ng_client *client);

int mqtt_ng_disconnect(struct mqtt_ng_client *client, uint8_t reason_code);

int mqtt_ng_sync(struct mqtt_ng_client *client);

time_t mqtt_ng_last_send_time(struct mqtt_ng_client *client);

void mqtt_ng_set_max_mem(struct mqtt_ng_client *client, size_t bytes);

void mqtt_ng_get_stats(struct mqtt_ng_client *client, struct mqtt_ng_stats *stats);

int mqtt_ng_set_topic_alias(struct mqtt_ng_client *client, const char *topic);