37563a92d5
Add new, socket based MQTT implementation, based on MQTT from Nordic nRF5 SDK, introducing the following features: * transport independent MQTT logic, with support for multiple transports * support for multiple MQTT versions (3.1.0 and 3.1.1 supported) * single event handler - no need to keep callback array in RAM * automatic send of Ping Requests, for connection keep-alive * message/event parameters wrapped into strucutres - easier extension for future MQTT versions * no separate thread needed to run MQTT - application only needs to call mqtt_input and mqtt_live periodically Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
|
|
* Copyright (c) 2018 Nordic Semiconductor ASA
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/** @file mqtt_transport.c
|
|
*
|
|
* @brief Internal functions to handle transport in MQTT module.
|
|
*/
|
|
|
|
#include "mqtt_transport.h"
|
|
|
|
/* Transport handler functions for TCP socket transport. */
|
|
extern int mqtt_client_tcp_connect(struct mqtt_client *client);
|
|
extern int mqtt_client_tcp_write(struct mqtt_client *client, const u8_t *data,
|
|
u32_t datalen);
|
|
extern int mqtt_client_tcp_read(struct mqtt_client *client, u8_t *data,
|
|
u32_t buflen);
|
|
extern int mqtt_client_tcp_disconnect(struct mqtt_client *client);
|
|
|
|
/**@brief Function pointer array for TCP/TLS transport handlers. */
|
|
const struct transport_procedure transport_fn[MQTT_TRANSPORT_NUM] = {
|
|
{
|
|
mqtt_client_tcp_connect,
|
|
mqtt_client_tcp_write,
|
|
mqtt_client_tcp_read,
|
|
mqtt_client_tcp_disconnect,
|
|
}
|
|
};
|
|
|
|
int mqtt_transport_connect(struct mqtt_client *client)
|
|
{
|
|
return transport_fn[client->transport.type].connect(client);
|
|
}
|
|
|
|
int mqtt_transport_write(struct mqtt_client *client, const u8_t *data,
|
|
u32_t datalen)
|
|
{
|
|
return transport_fn[client->transport.type].write(client, data,
|
|
datalen);
|
|
}
|
|
|
|
int mqtt_transport_read(struct mqtt_client *client, u8_t *data, u32_t buflen)
|
|
{
|
|
return transport_fn[client->transport.type].read(client, data, buflen);
|
|
}
|
|
|
|
int mqtt_transport_disconnect(struct mqtt_client *client)
|
|
{
|
|
return transport_fn[client->transport.type].disconnect(client);
|
|
}
|