MQTT C Client Libraries Internals
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MQTTAsync_responseOptions Struct Reference

Structure to define call options. More...

#include <MQTTAsync.h>

Collaboration diagram for MQTTAsync_responseOptions:

Data Fields

char struct_id [4]
 The eyecatcher for this structure.
 
int struct_version
 The version number of this structure.
 
MQTTAsync_onSuccess * onSuccess
 A pointer to a callback function to be called if the API call successfully completes.
 
MQTTAsync_onFailure * onFailure
 A pointer to a callback function to be called if the API call fails.
 
void * context
 A pointer to any application-specific context.
 
MQTTAsync_token token
 A token is returned from the call.
 
MQTTAsync_onSuccess5 * onSuccess5
 A pointer to a callback function to be called if the API call successfully completes.
 
MQTTAsync_onFailure5 * onFailure5
 A pointer to a callback function to be called if the API call successfully completes.
 
MQTTProperties properties
 MQTT V5 input properties.
 
MQTTSubscribe_options subscribeOptions
 
int subscribeOptionsCount
 
MQTTSubscribe_optionssubscribeOptionsList
 

Detailed Description

Structure to define call options.

For MQTT 5.0 there is input data as well as that describing the response method. So there is now also a synonym MQTTAsync_callOptions to better reflect the use. This responseOptions name is kept for backward compatibility.

Field Documentation

◆ context

void* MQTTAsync_responseOptions::context

A pointer to any application-specific context.

The the context pointer is passed to success or failure callback functions to provide access to the context information in the callback.

◆ onFailure

MQTTAsync_onFailure* MQTTAsync_responseOptions::onFailure

A pointer to a callback function to be called if the API call fails.

Can be set to NULL, in which case no indication of unsuccessful completion will be received.

◆ onFailure5

MQTTAsync_onFailure5* MQTTAsync_responseOptions::onFailure5

A pointer to a callback function to be called if the API call successfully completes.

Can be set to NULL, in which case no indication of successful completion will be received.

◆ onSuccess

MQTTAsync_onSuccess* MQTTAsync_responseOptions::onSuccess

A pointer to a callback function to be called if the API call successfully completes.

Can be set to NULL, in which case no indication of successful completion will be received.

◆ onSuccess5

MQTTAsync_onSuccess5* MQTTAsync_responseOptions::onSuccess5

A pointer to a callback function to be called if the API call successfully completes.

Can be set to NULL, in which case no indication of successful completion will be received.

◆ struct_id

char MQTTAsync_responseOptions::struct_id[4]

The eyecatcher for this structure.

Must be MQTR

◆ struct_version

int MQTTAsync_responseOptions::struct_version

The version number of this structure.

Must be 0 or 1 if 0, no MQTTV5 options

◆ token

MQTTAsync_token MQTTAsync_responseOptions::token

A token is returned from the call.

It can be used to track the state of this request, both in the callbacks and in future calls such as MQTTAsync_waitForCompletion. This is output only - any change by the application will be ignored.


The documentation for this struct was generated from the following file: