Enum Error 

pub enum Error {
    InvalidCode,
    InvalidOption(Error),
    TokenLength,
    OutOfMemory,
    MsgTooShort,
    EmptyNon,
    RequestAck,
    NonEmptyRst,
    EmptyWithContent,
}

Combined error type for message encoding, parsing and checking

Variants

InvalidCode

Invalid Code used

InvalidOption(Error)

Option could not be parsed

TokenLength

Invalid token length (greater 8)

OutOfMemory

The provided buffer is too small

MsgTooShort

The message is shorter than 4 bytes which is the minimum CoAP message length (the length of the message header)

EmptyNon

Empty Non-Confirmable message (Non-Confirmable messages may only be requests or responses).

RequestAck

Request in an ACK (ACKs may only be piggybacked responses or empty).

NonEmptyRst

Request or response in a RST message (RSTs must be empty).

EmptyWithContent

Empty message (code 0.00) with token, options or payload (empty messages must be actually empty, “An Empty message only contains the 4-byte header.”)

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate 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<E> From<Error> for Error<E>

fn from(e: Error) -> Self

Converts to this type from the input type.

impl PartialEq for Error

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

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

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 Copy for Error

impl Eq for Error

impl StructuralPartialEq for Error