Enum mqttrs::Error

pub enum Error {
    WriteZero,
    InvalidPid,
    InvalidQos(u8),
    InvalidConnectReturnCode(u8),
    InvalidProtocol(String, u8),
    InvalidHeader,
    InvalidLength,
    InvalidString(Utf8Error),
    IoError(ErrorKind, String),
}

Errors returned by encode() and decode().

Variants

WriteZero

Not enough space in the write buffer.

It is the caller's responsiblity to pass a big enough buffer to encode().

InvalidPid

Tried to encode or decode a ProcessIdentifier==0.

InvalidQos(u8)

Tried to decode a QoS > 2.

InvalidConnectReturnCode(u8)

Tried to decode a ConnectReturnCode > 5.

InvalidProtocol(String, u8)

Tried to decode an unknown protocol.

InvalidHeader

Tried to decode an invalid fixed header (packet type, flags, or remaining_length).

InvalidLength

Trying to encode/decode an invalid length.

The difference with WriteZero/UnexpectedEof is that it refers to an invalid/corrupt length rather than a buffer size issue.

InvalidString(Utf8Error)

Trying to decode a non-utf8 string.

IoError(ErrorKind, String)

Catch-all error when converting from std::io::Error.

Note: Only available when std is available. You'll hopefully never see this.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a copy of the value.

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

Performs copy-assignment from source.

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, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for Error

impl Error for Error

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

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

fn description(&self) -> &str

Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

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

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl From<Error> for IoError

fn from(err: Error) -> IoError

Performs the conversion.

impl From<Error> for Error

fn from(err: IoError) -> Error

Performs the conversion.

impl PartialEq<Error> for Error

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl StructuralEq for Error

impl StructuralPartialEq for Error