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#ifndef MQTT_MSG_H
#define MQTT_MSG_H
#include <stdint.h>
#include <stdbool.h>
#include "mqtt_config.h"
#include "mqtt_client.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Copyright (c) 2014, Stephen Robinson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
/* 7 6 5 4 3 2 1 0 */
/*| --- Message Type---- | DUP Flag | QoS Level | Retain | */
/* Remaining Length */
enum mqtt_message_type {
MQTT_MSG_TYPE_CONNECT = 1,
MQTT_MSG_TYPE_CONNACK = 2,
MQTT_MSG_TYPE_PUBLISH = 3,
MQTT_MSG_TYPE_PUBACK = 4,
MQTT_MSG_TYPE_PUBREC = 5,
MQTT_MSG_TYPE_PUBREL = 6,
MQTT_MSG_TYPE_PUBCOMP = 7,
MQTT_MSG_TYPE_SUBSCRIBE = 8,
MQTT_MSG_TYPE_SUBACK = 9,
MQTT_MSG_TYPE_UNSUBSCRIBE = 10,
MQTT_MSG_TYPE_UNSUBACK = 11,
MQTT_MSG_TYPE_PINGREQ = 12,
MQTT_MSG_TYPE_PINGRESP = 13,
MQTT_MSG_TYPE_DISCONNECT = 14
};
typedef struct mqtt_message {
uint8_t *data;
size_t length;
size_t fragmented_msg_total_length; /*!< total len of fragmented messages (zero for all other messages) */
size_t fragmented_msg_data_offset; /*!< data offset of fragmented messages (zero for all other messages) */
} mqtt_message_t;
typedef struct mqtt_connect_info {
char *client_id;
char *username;
char *password;
char *will_topic;
char *will_message;
int64_t keepalive; /*!< keepalive=0 -> keepalive is disabled */
int will_length;
int will_qos;
int will_retain;
int clean_session;
esp_mqtt_protocol_ver_t protocol_ver;
} mqtt_connect_info_t;
typedef struct mqtt_connection {
mqtt_message_t outbound_message;
#if MQTT_MSG_ID_INCREMENTAL
uint16_t last_message_id; /*!< last used id if incremental message id configured */
#endif
uint8_t *buffer;
size_t buffer_length;
mqtt_connect_info_t information;
} mqtt_connection_t;
static inline int mqtt_get_type(const uint8_t *buffer)
{
return (buffer[0] & 0xf0) >> 4;
}
static inline int mqtt_get_connect_session_present(const uint8_t *buffer)
{
return buffer[2] & 0x01;
}
static inline int mqtt_get_connect_return_code(const uint8_t *buffer)
{
return buffer[3];
}
static inline int mqtt_get_dup(const uint8_t *buffer)
{
return (buffer[0] & 0x08) >> 3;
}
static inline void mqtt_set_dup(uint8_t *buffer)
{
buffer[0] |= 0x08;
}
static inline int mqtt_get_qos(const uint8_t *buffer)
{
return (buffer[0] & 0x06) >> 1;
}
static inline int mqtt_get_retain(const uint8_t *buffer)
{
return (buffer[0] & 0x01);
}
bool mqtt_header_complete(uint8_t *buffer, size_t buffer_length);
size_t mqtt_get_total_length(const uint8_t *buffer, size_t length, int *fixed_size_len);
char *mqtt_get_publish_topic(uint8_t *buffer, size_t *length);
char *mqtt_get_publish_data(uint8_t *buffer, size_t *length);
char *mqtt_get_suback_data(uint8_t *buffer, size_t *length);
uint16_t mqtt_get_id(uint8_t *buffer, size_t length);
int mqtt_has_valid_msg_hdr(uint8_t *buffer, size_t length);
esp_err_t mqtt_msg_buffer_init(mqtt_connection_t *connection, int buffer_size);
void mqtt_msg_buffer_destroy(mqtt_connection_t *connection);
mqtt_message_t *mqtt_msg_connect(mqtt_connection_t *connection, mqtt_connect_info_t *info);
mqtt_message_t *mqtt_msg_publish(mqtt_connection_t *connection, const char *topic, const char *data, int data_length, int qos, int retain, uint16_t *message_id);
mqtt_message_t *mqtt_msg_puback(mqtt_connection_t *connection, uint16_t message_id);
mqtt_message_t *mqtt_msg_pubrec(mqtt_connection_t *connection, uint16_t message_id);
mqtt_message_t *mqtt_msg_pubrel(mqtt_connection_t *connection, uint16_t message_id);
mqtt_message_t *mqtt_msg_pubcomp(mqtt_connection_t *connection, uint16_t message_id);
mqtt_message_t *mqtt_msg_subscribe(mqtt_connection_t *connection, const esp_mqtt_topic_t topic_list[], int size, uint16_t *message_id) __attribute__((nonnull));
mqtt_message_t *mqtt_msg_unsubscribe(mqtt_connection_t *connection, const char *topic, uint16_t *message_id);
mqtt_message_t *mqtt_msg_pingreq(mqtt_connection_t *connection);
mqtt_message_t *mqtt_msg_pingresp(mqtt_connection_t *connection);
mqtt_message_t *mqtt_msg_disconnect(mqtt_connection_t *connection);
#ifdef __cplusplus
}
#endif
#endif /* MQTT_MSG_H */
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