Type Definition paho_mqtt_sys::MQTTAsync_updateConnectOptions

type MQTTAsync_updateConnectOptions = Option<unsafe extern "C" fn(context: *mut c_void, data: *mut MQTTAsync_connectData) -> c_int>;

This is a callback function which will allow the client application to update the connection data. @param data The connection data which can be modified by the application. @return Return a non-zero value to update the connect data, zero to keep the same data.