Struct NackPayload 

pub struct NackPayload {
    pub next_expected: u64,
    pub missing_bitmap: u64,
}

NACK payload for reliable streams.

A NACK is sent by the receiver when there is at least one gap in the received-sequence range. It tells the sender:

• next_expected: the next sequence the receiver is waiting for. By construction, this sequence is missing (otherwise the receiver would have advanced past it).
• missing_bitmap: bit i set iff sequence next_expected + 1 + i is missing (up to 64 future sequences).

Fields

next_expected: u64

Next sequence the receiver expects. All seqs < next_expected have been received contiguously.

missing_bitmap: u64

Bitmap of missing sequences after next_expected.

Implementations

impl NackPayload

pub const SIZE: usize = 16

Size of NACK payload

pub fn to_bytes(&self) -> [u8; 16]

Serialize to bytes

pub fn from_bytes(data: &[u8]) -> Option<Self>

Parse from bytes. Rejects buffers whose length is anything other than exactly Self::SIZE so trailing garbage isn’t silently accepted.

pub fn missing_sequences(&self) -> impl Iterator<Item = u64> + '_

Get missing sequence numbers.

Emits next_expected (always missing by construction when a NACK is sent), followed by every future seq whose bit is set in the missing bitmap.

Trait Implementations

impl Clone for NackPayload

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NackPayload

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

Formats the value using the given formatter.

impl Copy for NackPayload