Struct DiscardCounts 

pub struct DiscardCounts {
    pub transaction_events: u64,
    pub unanswered: u64,
    pub no_destination: u64,
    pub send_failures: u64,
    pub stun_unmatched: u64,
}

Places the endpoint throws something away that are not backpressure (§12.1).

Each of these was a let _ = … or a bare tracing line before X-18. None is necessarily a fault — most are the correct handling of something unwanted — but every one of them used to be invisible, and “how often” is not a question anyone should answer with grep | wc -l.

Fields

transaction_events: u64

Events for a client transaction whose application receiver was full or gone.

The serious one here. A dropped response event means an application that asked for a transaction’s outcome does not learn it, and nothing retransmits an event.

unanswered: u64

Server transactions abandoned because the application never answered them.

An application bug rather than a network one, which is exactly why it needs its own number: nothing on the wire will show it.

no_destination: u64

Messages a transaction wanted sent that had no destination to send them to.

send_failures: u64

Sends the transport refused.

The transaction is given a transport error, so this is not silent loss — but the rate is worth having, because a peer that has become unreachable shows up here first.

stun_unmatched: u64

STUN replies that matched no keep-alive, and STUN messages that were not replies.

RFC 5389 §6 wants the transaction ID unguessable precisely so a forged reply cannot be matched; a rising count here is either a broken peer or someone trying.

Implementations

impl DiscardCounts

pub fn total(self) -> u64

Everything discarded outside the backpressure path.

Trait Implementations

impl Clone for DiscardCounts

fn clone(&self) -> DiscardCounts

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiscardCounts

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

Formats the value using the given formatter.

impl Default for DiscardCounts

fn default() -> DiscardCounts

Returns the “default value” for a type.

impl PartialEq for DiscardCounts

fn eq(&self, other: &DiscardCounts) -> 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 DiscardCounts

impl Eq for DiscardCounts

impl StructuralPartialEq for DiscardCounts