MQTTAsync_responseOptions - Man Page

Synopsis

#include <MQTTAsync.h>

Data Fields

char struct_id [4]
int struct_version
MQTTAsync_onSuccess * onSuccess
MQTTAsync_onFailure * onFailure
void * context
MQTTAsync_token token
MQTTAsync_onSuccess5 * onSuccess5
MQTTAsync_onFailure5 * onFailure5
MQTTProperties properties
MQTTSubscribe_options subscribeOptions
int subscribeOptionsCount
MQTTSubscribe_options * subscribeOptionsList

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

char struct_id[4]

The eyecatcher for this structure. Must be MQTR

int struct_version

The version number of this structure. Must be 0 or 1 if 0, no MQTTV5 options

MQTTAsync_onSuccess* 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.

MQTTAsync_onFailure* 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.

void* 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.

MQTTAsync_token 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.

MQTTAsync_onSuccess5* 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.

MQTTAsync_onFailure5* 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.

MQTTProperties properties

MQTT V5 input properties

MQTTSubscribe_options subscribeOptions

int subscribeOptionsCount

MQTTSubscribe_options* subscribeOptionsList

Author

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Info

Tue Sep 14 2021 Paho Asynchronous MQTT C Client Library