Struct UnixDatagramFramed

pub struct UnixDatagramFramed<C, T = UnixDatagram> { /* private fields */ }

A unified Stream and Sink interface to an underlying UnixDatagram, using the Encoder and Decoder traits to encode and decode frames.

Raw Unix datagram sockets work with datagrams, but higher-level code usually wants to batch these into meaningful chunks, called “frames”. This method layers framing on top of this socket by using the Encoder and Decoder traits to handle encoding and decoding of messages frames. Note that the incoming and outgoing frame types may be distinct.

This function returns a single object that is both Stream and Sink; grouping this into a single object is often useful for layering things which require both read and write access to the underlying object.

If you want to work more directly with the streams and sink, consider calling split on the UnixDatagramFramed returned by this method, which will break them into separate objects, allowing them to interact more easily.

Implementations

impl<C, T> UnixDatagramFramed<C, T>

where T: Borrow<UnixDatagram>,

pub fn new(socket: T, codec: C) -> UnixDatagramFramed<C, T>

Create a new UnixDatagramFramed backed by the given socket and codec.

See struct level documentation for more details.

pub fn get_ref(&self) -> &T

Returns a reference to the underlying I/O stream wrapped by Framed.

Note

Care should be taken to not tamper with the underlying stream of data coming in as it may corrupt the stream of frames otherwise being worked with.

pub fn get_mut(&mut self) -> &mut T

Returns a mutable reference to the underlying I/O stream wrapped by Framed.

Note

Care should be taken to not tamper with the underlying stream of data coming in as it may corrupt the stream of frames otherwise being worked with.

pub fn codec(&self) -> &C

Returns a reference to the underlying codec wrapped by Framed.

Note that care should be taken to not tamper with the underlying codec as it may corrupt the stream of frames otherwise being worked with.

pub fn codec_mut(&mut self) -> &mut C

Returns a mutable reference to the underlying codec wrapped by UnixDatagramFramed.

Note that care should be taken to not tamper with the underlying codec as it may corrupt the stream of frames otherwise being worked with.

pub fn read_buffer(&self) -> &BytesMut

Returns a reference to the read buffer.

pub fn read_buffer_mut(&mut self) -> &mut BytesMut

Returns a mutable reference to the read buffer.

pub fn into_inner(self) -> T

Consumes the Framed, returning its underlying I/O stream.

Trait Implementations

impl<C, T> Debug for UnixDatagramFramed<C, T>

where C: Debug, T: Debug,

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

Formats the value using the given formatter.

impl<I, C, T> Sink<(I, UnixSocketAddress)> for UnixDatagramFramed<C, T>

where T: Borrow<UnixDatagram>, C: Encoder<I>,

type Error = <C as Encoder<I>>::Error

The type of value produced by the sink when an error occurs.

fn poll_ready( self: Pin<&mut UnixDatagramFramed<C, T>>, cx: &mut Context<'_>, ) -> Poll<Result<(), <UnixDatagramFramed<C, T> as Sink<(I, UnixSocketAddress)>>::Error>>

Attempts to prepare the Sink to receive a value.

fn start_send( self: Pin<&mut UnixDatagramFramed<C, T>>, item: (I, UnixSocketAddress), ) -> Result<(), <UnixDatagramFramed<C, T> as Sink<(I, UnixSocketAddress)>>::Error>

Begin the process of sending a value to the sink. Each call to this function must be preceded by a successful call to poll_ready which returned Poll::Ready(Ok(())).

fn poll_flush( self: Pin<&mut UnixDatagramFramed<C, T>>, cx: &mut Context<'_>, ) -> Poll<Result<(), <UnixDatagramFramed<C, T> as Sink<(I, UnixSocketAddress)>>::Error>>

Flush any remaining output from this sink.

fn poll_close( self: Pin<&mut UnixDatagramFramed<C, T>>, cx: &mut Context<'_>, ) -> Poll<Result<(), <UnixDatagramFramed<C, T> as Sink<(I, UnixSocketAddress)>>::Error>>

Flush any remaining output and close this sink, if necessary.

impl<C, T> Stream for UnixDatagramFramed<C, T>

where T: Borrow<UnixDatagram>, C: Decoder,

type Item = Result<(<C as Decoder>::Item, UnixSocketAddress), <C as Decoder>::Error>

Values yielded by the stream.

fn poll_next( self: Pin<&mut UnixDatagramFramed<C, T>>, cx: &mut Context<'_>, ) -> Poll<Option<<UnixDatagramFramed<C, T> as Stream>::Item>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted.

fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream.

impl<C, T> Unpin for UnixDatagramFramed<C, T>