Enum ConnectReturnCode

#[repr(u8)]
pub enum ConnectReturnCode {
    Accepted = 0,
    UnacceptableProtocolVersion = 1,
    IdentifierRejected = 2,
    ServerUnavailable = 3,
    BadUserNameOrPassword = 4,
    NotAuthorized = 5,
}

Connect Return Code

This is the 2nd byte of the variable header of the CONNACK packet which indicates whether the server accepted the connection, and if not, contains some information about why it rejected the request.

These are defined in MQTT v3.x. In v5, these are replaced with reason codes which expand the number of reasons why the connection was rejected.

Variants

Accepted = 0

The connection was accepted.

UnacceptableProtocolVersion = 1

The Server does not support the level of the MQTT protocol requested by the Client.

IdentifierRejected = 2

The Client identifier is correct UTF-8 but not allowed by the Server

ServerUnavailable = 3

The Network Connection has been made but the MQTT service is unavailable

BadUserNameOrPassword = 4

The data in the user name or password is malformed

NotAuthorized = 5

The Client is not authorized to connect

Trait Implementations

impl Clone for ConnectReturnCode

fn clone(&self) -> ConnectReturnCode

Returns a duplicate of the value.

const fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ConnectReturnCode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ConnectReturnCode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for ConnectReturnCode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ConnectReturnCode

fn cmp(&self, other: &ConnectReturnCode) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ConnectReturnCode

fn eq(&self, other: &ConnectReturnCode) -> bool

Tests for self and other values to be equal, and is used by ==.

const fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ConnectReturnCode

fn partial_cmp(&self, other: &ConnectReturnCode) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<u8> for ConnectReturnCode

type Error = Error

The type returned in the event of a conversion error.

fn try_from(rc: u8) -> Result<Self>

Performs the conversion.

impl Copy for ConnectReturnCode

impl Eq for ConnectReturnCode

impl StructuralPartialEq for ConnectReturnCode