Struct WriteEarlyData 

pub struct WriteEarlyData<'a> { /* private fields */ }

Available on crate feature std only.

Allows writing of early data in resumed TLS 1.3 connections.

“Early data” is also known as “0-RTT data”.

This type implements io::Write.

Implementations

impl<'a> WriteEarlyData<'a>

pub fn bytes_left(&self) -> usize

How many bytes you may send. Writes will become short once this reaches zero.

pub fn exporter(&mut self) -> Result<KeyingMaterialExporter, Error>

Returns the “early” exporter that can derive key material for use in early data

See RFC5705 for general details on what exporters are, and RFC8446 S7.5 for specific details on the “early” exporter.

Beware that the early exporter requires care, as it is subject to the same potential for replay as early data itself. See RFC8446 appendix E.5.1 for more detail.

This function can be called at most once per connection. This function will error: if called more than once per connection.

If you are looking for the normal exporter, this is available from ConnectionCommon::exporter().

Trait Implementations

impl Write for WriteEarlyData<'_>

fn write(&mut self, buf: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.