Enum Discard 

#[non_exhaustive]
pub enum Discard {
    Truncated,
    GroupSource,
    UnknownDestination,
    ListenerMismatch {
        other_interface: bool,
    },
    TooShort,
    NotBip,
    LengthMismatch,
    DestinationMismatch,
    RateLimited,
    UnknownFunction,
    MalformedPayload,
    OwnEcho,
    GroupOrigin,
    UnanswerableSource,
    ForwardedUntrusted,
}

Why a datagram was dropped: each is counted once, under the first rule it fails, in this order.

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.

Truncated

The OS or the buffer cut it short.

GroupSource

Its UDP source is a group address (Groups::contains_ip).

UnknownDestination

The host couldn’t say where it was sent (Datagram::to is None), so nothing tells a unicast from a broadcast (#1678).

ListenerMismatch

A broadcast listener read it but doesn’t keep it: not sent to this link’s broadcast address, or it arrived on another interface.

Fields

other_interface: bool

It arrived on another interface.

TooShort

Shorter than the 4-octet BVLL header.

NotBip

The BVLC type isn’t B/IP’s.

LengthMismatch

The Length field differs from the datagram’s length.

DestinationMismatch

Its function doesn’t fit the address it was sent to.

RateLimited

A management request the Policy refused.

UnknownFunction

A function Annex J doesn’t define.

MalformedPayload

The payload doesn’t fit the function, and nothing answers it.

OwnEcho

It comes from this node: from its own address, or a Forwarded-NPDU naming it as the origin.

GroupOrigin

A Forwarded-NPDU whose origin is a group address.

UnanswerableSource

A request whose NAK couldn’t reach anyone: from the unspecified address, port 0, a group address or this node.

ForwardedUntrusted

A Forwarded-NPDU a foreign device doesn’t take from this sender (ForwardedTrust::ConfiguredBbmd).

Trait Implementations

impl Clone for Discard

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 Discard

impl Debug for Discard

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

Formats the value using the given formatter.

impl Eq for Discard

impl PartialEq for Discard

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Discard