Struct trust_dns_proto::udp::UdpStream

pub struct UdpStream { /* private fields */ }

A UDP stream of DNS binary packets

Implementations

impl UdpStream

pub fn new(
    name_server: SocketAddr
) -> (Box<dyn Future<Item = UdpStream, Error = Error> + Send>, BufStreamHandle)

This method is intended for client connections, see with_bound for a method better for straight listening. It is expected that the resolver wrapper will be responsible for creating and managing new UdpStreams such that each new client would have a random port (reduce chance of cache poisoning). This will return a randomly assigned local port.

Arguments

• name_server - socket address for the remote server (used to determine IPv4 or IPv6)

Return

a tuple of a Future Stream which will handle sending and receiving messsages, and a handle which can be used to send messages into the stream.

pub fn with_bound(socket: UdpSocket) -> (Self, BufStreamHandle)

Initialize the Stream with an already bound socket. Generally this should be only used for server listening sockets. See new for a client oriented socket. Specifically, this there is already a bound socket in this context, whereas new makes sure to randomize ports for additional cache poison prevention.

Arguments

• socket - an already bound UDP socket

Return

a tuple of a Future Stream which will handle sending and receiving messsages, and a handle which can be used to send messages into the stream.

Trait Implementations

impl Stream for UdpStream

type Item = SerialMessage

The type of item this stream will yield on success.

type Error = Error

The type of error this stream may generate.

fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error>

Attempt to pull out the next value of this stream, returning None if the stream is finished.

fn wait(self) -> Wait<Self>where
    Self: Sized,

Creates an iterator which blocks the current thread until each item of this stream is resolved.

fn into_future(self) -> StreamFuture<Self>where
    Self: Sized,

Converts this stream into a Future.

fn map<U, F>(self, f: F) -> Map<Self, F>where
    F: FnMut(Self::Item) -> U,
    Self: Sized,

Converts a stream of type T to a stream of type U.

fn map_err<U, F>(self, f: F) -> MapErr<Self, F>where
    F: FnMut(Self::Error) -> U,
    Self: Sized,

Converts a stream of error type T to a stream of error type U.

fn filter<F>(self, f: F) -> Filter<Self, F>where
    F: FnMut(&Self::Item) -> bool,
    Self: Sized,

Filters the values produced by this stream according to the provided predicate.

fn filter_map<F, B>(self, f: F) -> FilterMap<Self, F>where
    F: FnMut(Self::Item) -> Option<B>,
    Self: Sized,

Filters the values produced by this stream while simultaneously mapping them to a different type.

fn then<F, U>(self, f: F) -> Then<Self, F, U>where
    F: FnMut(Result<Self::Item, Self::Error>) -> U,
    U: IntoFuture,
    Self: Sized,

Chain on a computation for when a value is ready, passing the resulting item to the provided closure f.

fn and_then<F, U>(self, f: F) -> AndThen<Self, F, U>where
    F: FnMut(Self::Item) -> U,
    U: IntoFuture<Error = Self::Error>,
    Self: Sized,

Chain on a computation for when a value is ready, passing the successful results to the provided closure f.

fn or_else<F, U>(self, f: F) -> OrElse<Self, F, U>where
    F: FnMut(Self::Error) -> U,
    U: IntoFuture<Item = Self::Item>,
    Self: Sized,

Chain on a computation for when an error happens, passing the erroneous result to the provided closure f.

fn collect(self) -> Collect<Self>where
    Self: Sized,

Collect all of the values of this stream into a vector, returning a future representing the result of that computation.

fn fold<F, T, Fut>(self, init: T, f: F) -> Fold<Self, F, Fut, T>where
    F: FnMut(T, Self::Item) -> Fut,
    Fut: IntoFuture<Item = T>,
    Self::Error: From<<Fut as IntoFuture>::Error>,
    Self: Sized,

Execute an accumulating computation over a stream, collecting all the values into one final result.

fn skip_while<P, R>(self, pred: P) -> SkipWhile<Self, P, R>where
    P: FnMut(&Self::Item) -> R,
    R: IntoFuture<Item = bool, Error = Self::Error>,
    Self: Sized,

Skip elements on this stream while the predicate provided resolves to true.

fn take_while<P, R>(self, pred: P) -> TakeWhile<Self, P, R>where
    P: FnMut(&Self::Item) -> R,
    R: IntoFuture<Item = bool, Error = Self::Error>,
    Self: Sized,

Take elements from this stream while the predicate provided resolves to true.

fn for_each<F, U>(self, f: F) -> ForEach<Self, F, U>where
    F: FnMut(Self::Item) -> U,
    U: IntoFuture<Item = (), Error = Self::Error>,
    Self: Sized,

Runs this stream to completion, executing the provided closure for each element on the stream.

fn from_err<E>(self) -> FromErr<Self, E>where
    E: From<Self::Error>,
    Self: Sized,

Map this stream’s error to any error implementing From for this stream’s Error, returning a new stream.

fn take(self, amt: u64) -> Take<Self>where
    Self: Sized,

Creates a new stream of at most amt items of the underlying stream.

fn skip(self, amt: u64) -> Skip<Self>where
    Self: Sized,

Creates a new stream which skips amt items of the underlying stream.

fn fuse(self) -> Fuse<Self>where
    Self: Sized,

Fuse a stream such that poll will never again be called once it has finished.

fn by_ref(&mut self) -> &mut Selfwhere
    Self: Sized,

Borrows a stream, rather than consuming it.

fn merge<S>(self, other: S) -> Merge<Self, S>where
    S: Stream<Error = Self::Error>,
    Self: Sized,

👎Deprecated: functionality provided by select now

An adapter for merging the output of two streams.

fn zip<S>(self, other: S) -> Zip<Self, S>where
    S: Stream<Error = Self::Error>,
    Self: Sized,

An adapter for zipping two streams together.

fn chain<S>(self, other: S) -> Chain<Self, S>where
    S: Stream<Item = Self::Item, Error = Self::Error>,
    Self: Sized,

Adapter for chaining two stream.

fn peekable(self) -> Peekable<Self>where
    Self: Sized,

Creates a new stream which exposes a peek method.

fn chunks(self, capacity: usize) -> Chunks<Self>where
    Self: Sized,

An adaptor for chunking up items of the stream inside a vector.

fn select<S>(self, other: S) -> Select<Self, S>where
    S: Stream<Item = Self::Item, Error = Self::Error>,
    Self: Sized,

Creates a stream that selects the next element from either this stream or the provided one, whichever is ready first.

fn forward<S>(self, sink: S) -> Forward<Self, S>where
    S: Sink<SinkItem = Self::Item>,
    Self::Error: From<<S as Sink>::SinkError>,
    Self: Sized,

A future that completes after the given stream has been fully processed into the sink, including flushing.

fn inspect<F>(self, f: F) -> Inspect<Self, F>where
    F: FnMut(&Self::Item),
    Self: Sized,

Do something with each item of this stream, afterwards passing it on.

fn inspect_err<F>(self, f: F) -> InspectErr<Self, F>where
    F: FnMut(&Self::Error),
    Self: Sized,

Do something with the error of this stream, afterwards passing it on.