Enum Error

pub enum Error {
    InvalidConnectReturnCode(u8),
    InvalidPacketType(u8),
    InvalidReasonCode(u8),
    InvalidProtocolName(String),
    InvalidProtocolLevel(u8),
    InvalidProperty(u8),
    InvalidUtf8,
    InvalidQos(u8),
    InvalidRetainHandling(u8),
    Io(Error),
    MalformedVariableByteInteger,
    MalformedPacket,
    NoCodes,
    NotEnoughBytes(usize),
    NoTopic,
    OutgoingPayloadSizeLimitExceeded(usize),
    OutOfBounds,
    PayloadTooLarge,
    PayloadRequired,
    PayloadSizeLimitExceeded(usize),
    ProtocolError,
    ProtocolMismatch,
    ProtocolNotSupported,
    PropertyMismatch,
    StringTooLong,
}

Represents errors that can occur when working with the MQTT protocol.

Each variant includes a descriptive error message and, where applicable, additional context (e.g., invalid values or sizes).

Variants

InvalidConnectReturnCode(u8)

Indicates an invalid connect return code.

InvalidPacketType(u8)

Indicates an invalid packet type.

InvalidReasonCode(u8)

Indicates an invalid reason code.

InvalidProtocolName(String)

Indicates an invalid protocol name.

InvalidProtocolLevel(u8)

Indicates an invalid protocol level.

InvalidProperty(u8)

Indicates an invalid property.

InvalidUtf8

Indicates invalid UTF-8 data.

InvalidQos(u8)

Indicates an invalid QoS level.

InvalidRetainHandling(u8)

Indicates invalid retain handling.

Io(Error)

Wraps an I/O error.

MalformedVariableByteInteger

Indicates a malformed variable byte integer.

MalformedPacket

Indicates a malformed packet.

NoCodes

Indicates that the payload must contain at least one return code.

NotEnoughBytes(usize)

Indicates that there are not enough bytes to frame the packet.

NoTopic

Indicates that the payload must contain at least one topic filter.

OutgoingPayloadSizeLimitExceeded(usize)

Indicates that the outgoing payload size limit has been exceeded.

OutOfBounds

Indicates an out-of-bounds access.

PayloadTooLarge

Indicates that the payload is too large.

PayloadRequired

Indicates that a payload is required but missing.

PayloadSizeLimitExceeded(usize)

Indicates that the payload size limit has been exceeded.

ProtocolError

Indicates a protocol error.

ProtocolMismatch

Indicates a protocol mismatch.

ProtocolNotSupported

Indicates that the protocol is not supported.

PropertyMismatch

Indicates a property mismatch.

StringTooLong

Indicates that a string is too long.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.