Enum SendRefusal 

#[non_exhaustive]
pub enum SendRefusal {
    TooLong {
        max: usize,
    },
    HoldFull,
    GroupDestination,
    SocketFull,
    SocketError,
}

Why a send was refused. Nothing went out.

The link refuses an NPDU it can’t carry, a foreign device’s node a broadcast it can’t hold, and the host’s socket, through a port’s Datagrams, a datagram it can’t take.

It is #[non_exhaustive], so a later reason isn’t a breaking change: a match needs a wildcard arm.

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.

TooLong

The NPDU is longer than Link::max_npdu allows.

Fields

max: usize

The longest NPDU this cast takes.

HoldFull

A foreign device holds as many broadcasts as its caller can keep (Foreign::hold) until its first registration attempt is answered.

GroupDestination

A unicast to one of the link’s group addresses (Link::groups): the subnet’s broadcast address, the limited broadcast or a multicast address. An Original-Unicast-NPDU goes to one node’s own address; to reach the group, broadcast (Link::broadcast).

SocketFull

The host’s socket can’t take the datagram now: its queue is full.

SocketError

The host’s socket couldn’t send the datagram: its buffer can’t hold the encoded message, or the send failed.

Trait Implementations

impl Clone for SendRefusal

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SendRefusal

impl Debug for SendRefusal

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

Formats the value using the given formatter.

impl Display for SendRefusal

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

Formats the value using the given formatter.

impl Eq for SendRefusal

impl Error for SendRefusal

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 PartialEq for SendRefusal

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SendRefusal