|  | MQTT C Client Libraries Internals
    | 
Structure to define call options. More...
#include <MQTTAsync.h>

| Data Fields | |
| char | struct_id [4] | 
| The eyecatcher for this structure.  More... | |
| int | struct_version | 
| The version number of this structure.  More... | |
| MQTTAsync_onSuccess * | onSuccess | 
| A pointer to a callback function to be called if the API call successfully completes.  More... | |
| MQTTAsync_onFailure * | onFailure | 
| A pointer to a callback function to be called if the API call fails.  More... | |
| void * | context | 
| A pointer to any application-specific context.  More... | |
| MQTTAsync_token | token | 
| A token is returned from the call.  More... | |
| MQTTAsync_onSuccess5 * | onSuccess5 | 
| A pointer to a callback function to be called if the API call successfully completes.  More... | |
| MQTTAsync_onFailure5 * | onFailure5 | 
| A pointer to a callback function to be called if the API call successfully completes.  More... | |
| MQTTProperties | properties | 
| MQTT V5 input properties. | |
| MQTTSubscribe_options | subscribeOptions | 
| int | subscribeOptionsCount | 
| MQTTSubscribe_options * | subscribeOptionsList | 
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.
| 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.
| 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.
| 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.
| 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.
| 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.
| char MQTTAsync_responseOptions::struct_id[4] | 
The eyecatcher for this structure.
Must be MQTR
| int MQTTAsync_responseOptions::struct_version | 
The version number of this structure.
Must be 0 or 1 if 0, no MQTTV5 options
| 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.
 1.8.17
 1.8.17