core_mqtt_state.h

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/*
 * coreMQTT v2.1.1
 * Copyright (C) 2022 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
#ifndef CORE_MQTT_STATE_H
#define CORE_MQTT_STATE_H
 
/* *INDENT-OFF* */
#ifdef __cplusplus
    extern "C" {
#endif
/* *INDENT-ON* */
 
#include "core_mqtt.h"
 
#define MQTT_STATE_CURSOR_INITIALIZER    ( ( size_t ) 0 )
 
typedef size_t MQTTStateCursor_t;
 
typedef enum MQTTStateOperation
{
    MQTT_SEND,
    MQTT_RECEIVE
} MQTTStateOperation_t;
MQTTStatus_t MQTT_ReserveState( const MQTTContext_t * pMqttContext,
                                uint16_t packetId,
                                MQTTQoS_t qos );
MQTTPublishState_t MQTT_CalculateStatePublish( MQTTStateOperation_t opType,
                                               MQTTQoS_t qos );
MQTTStatus_t MQTT_UpdateStatePublish( const MQTTContext_t * pMqttContext,
                                      uint16_t packetId,
                                      MQTTStateOperation_t opType,
                                      MQTTQoS_t qos,
                                      MQTTPublishState_t * pNewState );
MQTTStatus_t MQTT_RemoveStateRecord( const MQTTContext_t * pMqttContext,
                                     uint16_t packetId );
MQTTPublishState_t MQTT_CalculateStateAck( MQTTPubAckType_t packetType,
                                           MQTTStateOperation_t opType,
                                           MQTTQoS_t qos );
MQTTStatus_t MQTT_UpdateStateAck( const MQTTContext_t * pMqttContext,
                                  uint16_t packetId,
                                  MQTTPubAckType_t packetType,
                                  MQTTStateOperation_t opType,
                                  MQTTPublishState_t * pNewState );
uint16_t MQTT_PubrelToResend( const MQTTContext_t * pMqttContext,
                              MQTTStateCursor_t * pCursor,
                              MQTTPublishState_t * pState );
/* @[declare_mqtt_publishtoresend] */
uint16_t MQTT_PublishToResend( const MQTTContext_t * pMqttContext,
                               MQTTStateCursor_t * pCursor );
/* @[declare_mqtt_publishtoresend] */
 
const char * MQTT_State_strerror( MQTTPublishState_t state );
/* *INDENT-OFF* */
#ifdef __cplusplus
    }
#endif
/* *INDENT-ON* */
 
#endif /* ifndef CORE_MQTT_STATE_H */