Struct NegotiationWriter 

pub struct NegotiationWriter<W: AsyncWrite + Unpin> { /* private fields */ }

Writes length-prefixed negotiation frames to an AsyncWrite transport.

NegotiationWriter::write_frame writes a 4-byte big-endian length prefix followed by the body, then flushes.

For server-side error responses, the body MUST be under 16 MiB (MAX_CHUNK_LEN) so the high byte of the length prefix is 0x00 — this is the wire-format invariant that makes the framing-disambiguation trick sound (see ADR-052 §5). Self::write_frame does not enforce this; callers building error responses with error_response_bytes are well within the limit by construction.

Implementations

impl<W: AsyncWrite + Unpin> NegotiationWriter<W>

pub fn new(writer: W) -> Self

Wrap an AsyncWrite transport in a negotiation frame writer.

pub fn into_inner(self) -> W

Consume the writer and return the underlying transport.

pub async fn write_frame(&mut self, body: &[u8]) -> Result<(), NegotiationError>

Write one length-prefixed frame: 4-byte BE length + body + flush.