Enum ConnectReasonCode 

#[non_exhaustive]
pub enum ConnectReasonCode {
    Success,
    UnspecifiedError,
    MalformedPacket,
    ProtocolError,
    ImplementationSpecificError,
    UnsupportedProtocolVersion,
    ClientIdentifierNotValid,
    BadUserNamePassword,
    NotAuthorized,
    ServerUnavailable,
    ServerBusy,
    Banned,
    BadAuthenticationMethod,
    TopicNameInvalid,
    PacketTooLarge,
    QuotaExceeded,
    PayloadFormatInvalid,
    RetainNotSupported,
    QoSNotSupported,
    UseAnotherServer,
    ServerMoved,
    ConnectionRateExceeded,
}

Reason a broker rejected (or accepted) a connection attempt.

Modeled as the MQTT 5 CONNACK reason-code superset; MQTT 3.1.1 return codes map into the matching subset. Codes that can only be produced by an MQTT 5 broker are documented as such and are never emitted in 0.3.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Success

Connection accepted

UnspecifiedError

The broker does not wish to reveal the reason (MQTT 5 only)

MalformedPacket

CONNECT packet could not be parsed correctly (MQTT 5 only)

ProtocolError

Data in the CONNECT does not conform to the specification (MQTT 5 only)

ImplementationSpecificError

Implementation-specific rejection (MQTT 5 only)

UnsupportedProtocolVersion

Broker does not support the requested protocol version

ClientIdentifierNotValid

Client identifier is valid UTF-8 but not allowed by the broker

BadUserNamePassword

Username or password rejected

NotAuthorized

Client is not authorized to connect

ServerUnavailable

MQTT service is unavailable

ServerBusy

Broker is busy, try again later (MQTT 5 only)

Banned

Client has been banned by administrative action (MQTT 5 only)

BadAuthenticationMethod

Authentication method is not supported (MQTT 5 only)

TopicNameInvalid

Will topic name is not accepted (MQTT 5 only)

PacketTooLarge

CONNECT packet exceeded broker’s maximum packet size (MQTT 5 only)

QuotaExceeded

Implementation or administrative quota exceeded (MQTT 5 only)

PayloadFormatInvalid

Will payload does not match its payload format indicator (MQTT 5 only)

RetainNotSupported

Broker does not support retained messages (MQTT 5 only)

QoSNotSupported

Will QoS is higher than the broker supports (MQTT 5 only)

UseAnotherServer

Client should temporarily use another server (MQTT 5 only)

ServerMoved

Client should permanently use another server (MQTT 5 only)

ConnectionRateExceeded

Connection rate limit exceeded (MQTT 5 only)

Trait Implementations

impl Clone for ConnectReasonCode

fn clone(&self) -> ConnectReasonCode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ConnectReasonCode

impl Debug for ConnectReasonCode

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

Formats the value using the given formatter.

impl Eq for ConnectReasonCode

impl PartialEq for ConnectReasonCode

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ConnectReasonCode