Struct ReplayWindow 

pub struct ReplayWindow { /* private fields */ }

Sliding window for replay protection.

Tracks which packet counters have been received within a window of REPLAY_WINDOW_SIZE. Packets with counters below the window or already seen within the window are rejected.

Based on WireGuard’s anti-replay mechanism (RFC 6479 style).

Implementations

impl ReplayWindow

pub fn new() -> Self

Create a new replay window.

pub fn check(&self, counter: u64) -> bool

Check if a counter is valid (not replayed, not too old).

Returns true if the counter is acceptable, false if it should be rejected. Does NOT update the window - call accept after successful decryption.

pub fn accept(&mut self, counter: u64)

Accept a counter into the window.

Call this only after successful decryption to prevent DoS attacks that exhaust the window.

pub fn highest(&self) -> u64

Get the highest counter seen.

pub fn reset(&mut self)

Reset the window (use when rekeying).

Trait Implementations

impl Clone for ReplayWindow

fn clone(&self) -> ReplayWindow

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReplayWindow

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

Formats the value using the given formatter.

impl Default for ReplayWindow

fn default() -> Self

Returns the “default value” for a type.