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| <h1 class='fqn'><span class='in-band'>Function <a href='index.html'>paho_mqtt3as_sys</a>::<wbr><a class="fn" href=''>MQTTAsync_connect</a></span><span class='out-of-band'><span id='render-detail'> |
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| <pre class='rust fn'>pub unsafe extern "C" fn MQTTAsync_connect(<br> handle: <a class="type" href="../paho_mqtt3as_sys/type.MQTTAsync.html" title="type paho_mqtt3as_sys::MQTTAsync">MQTTAsync</a>, <br> options: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*const </a><a class="struct" href="../paho_mqtt3as_sys/struct.MQTTAsync_connectOptions.html" title="struct paho_mqtt3as_sys::MQTTAsync_connectOptions">MQTTAsync_connectOptions</a><br>) -> <a class="type" href="https://doc.rust-lang.org/nightly/std/os/raw/type.c_int.html" title="type std::os::raw::c_int">c_int</a></pre><div class='docblock'><p>This function attempts to connect a previously-created client (see |
| MQTTAsync_create()) to an MQTT server using the specified options. If you |
| want to enable asynchronous message and status notifications, you must call |
| MQTTAsync_setCallbacks() prior to MQTTAsync_connect(). |
| @param handle A valid client handle from a successful call to |
| MQTTAsync_create(). |
| @param options A pointer to a valid MQTTAsync_connectOptions |
| structure. |
| @return ::MQTTASYNC_SUCCESS if the client connect request was accepted. |
| If the client was unable to connect to the server, an error code is |
| returned via the onFailure callback, if set. |
| Error codes greater than 0 are returned by the MQTT protocol:<br><br> |
| <b>1</b>: Connection refused: Unacceptable protocol version<br> |
| <b>2</b>: Connection refused: Identifier rejected<br> |
| <b>3</b>: Connection refused: Server unavailable<br> |
| <b>4</b>: Connection refused: Bad user name or password<br> |
| <b>5</b>: Connection refused: Not authorized<br> |
| <b>6-255</b>: Reserved for future use<br></p> |
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