Struct FrameWriter 

pub struct FrameWriter;

Zero-copy frame writer — encrypts and writes in a single syscall

Implementations

impl FrameWriter

pub const SPAWN_BLOCKING_THRESHOLD: usize

Threshold size (bytes) above which we use tokio::task::spawn_blocking for encryption

pub fn new() -> Self

Create a new frame writer

pub async fn write_frame( &self, stream: &mut TcpStream, session: &CryptoSession, data: &[u8], ) -> Result<usize, FrameError>

Write a single message as one or more frames: [len:4][encrypted_payload + tag:16]

If data exceeds MAX_FRAME_PAYLOAD, it is split into multiple frames. If total data exceeds SPAWN_BLOCKING_THRESHOLD, encryption is offloaded to spawn_blocking.

pub async fn write_frames_batch( &self, stream: &mut TcpStream, session: &CryptoSession, payloads: &[&[u8]], ) -> Result<usize, FrameError>

Write multiple frames in a batch (TCP write coalescing). Accumulates all frames into a single buffer → one write_all().

impl FrameWriter

pub async fn write_frame_padded( &self, stream: &mut TcpStream, session: &CryptoSession, data: &[u8], profile: PaddingProfile, ) -> Result<usize, FrameError>

Trait Implementations

impl Default for FrameWriter

fn default() -> Self

Returns the “default value” for a type.