Struct tokio::net::TcpStream

pub struct TcpStream { /* fields omitted */ }

An I/O object representing a TCP stream connected to a remote endpoint.

A TCP stream can either be created by connecting to an endpoint, via the connect method, or by accepting a connection from a listener.

Methods

impl TcpStream

fn connect(addr: &SocketAddr) -> ConnectFuture

Create a new TCP stream connected to the specified address.

This function will create a new TCP socket and attempt to connect it to the addr provided. The returned future will be resolved once the stream has successfully connected, or it wil return an error if one occurs.

fn from_std(stream: TcpStream, handle: &Handle) -> Result<TcpStream>

Create a new TcpStream from a net::TcpStream.

This function will convert a TCP stream created by the standard library to a TCP stream ready to be used with the provided event loop handle. The stream returned is associated with the event loop and ready to perform I/O.

fn connect_std(
    stream: TcpStream,
    addr: &SocketAddr,
    handle: &Handle
) -> ConnectFuture

Creates a new TcpStream from the pending socket inside the given std::net::TcpStream, connecting it to the address specified.

This constructor allows configuring the socket before it's actually connected, and this function will transfer ownership to the returned TcpStream if successful. An unconnected TcpStream can be created with the net2::TcpBuilder type (and also configured via that route).

The platform specific behavior of this function looks like:

• On Unix, the socket is placed into nonblocking mode and then a connect call is issued.

• On Windows, the address is stored internally and the connect operation is issued when the returned TcpStream is registered with an event loop. Note that on Windows you must bind a socket before it can be connected, so if a custom TcpBuilder is used it should be bound (perhaps to INADDR_ANY) before this method is called.

fn local_addr(&self) -> Result<SocketAddr>

Returns the local address that this stream is bound to.

fn peer_addr(&self) -> Result<SocketAddr>

Returns the remote address that this stream is connected to.

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

Receives data on the socket from the remote address to which it is connected, without removing that data from the queue. On success, returns the number of bytes peeked.

Successive calls return the same data. This is accomplished by passing MSG_PEEK as a flag to the underlying recv system call.

fn shutdown(&self, how: Shutdown) -> Result<()>

Shuts down the read, write, or both halves of this connection.

This function will cause all pending and future I/O on the specified portions to return immediately with an appropriate value (see the documentation of Shutdown).

fn nodelay(&self) -> Result<bool>

Gets the value of the TCP_NODELAY option on this socket.

For more information about this option, see set_nodelay.

fn set_nodelay(&self, nodelay: bool) -> Result<()>

Sets the value of the TCP_NODELAY option on this socket.

If set, this option disables the Nagle algorithm. This means that segments are always sent as soon as possible, even if there is only a small amount of data. When not set, data is buffered until there is a sufficient amount to send out, thereby avoiding the frequent sending of small packets.

fn recv_buffer_size(&self) -> Result<usize>

Gets the value of the SO_RCVBUF option on this socket.

For more information about this option, see set_recv_buffer_size.

fn set_recv_buffer_size(&self, size: usize) -> Result<()>

Sets the value of the SO_RCVBUF option on this socket.

Changes the size of the operating system's receive buffer associated with the socket.

fn send_buffer_size(&self) -> Result<usize>

Gets the value of the SO_SNDBUF option on this socket.

For more information about this option, see set_send_buffer.

fn set_send_buffer_size(&self, size: usize) -> Result<()>

Sets the value of the SO_SNDBUF option on this socket.

Changes the size of the operating system's send buffer associated with the socket.

fn keepalive(&self) -> Result<Option<Duration>>

Returns whether keepalive messages are enabled on this socket, and if so the duration of time between them.

For more information about this option, see set_keepalive.

fn set_keepalive(&self, keepalive: Option<Duration>) -> Result<()>

Sets whether keepalive messages are enabled to be sent on this socket.

On Unix, this option will set the SO_KEEPALIVE as well as the TCP_KEEPALIVE or TCP_KEEPIDLE option (depending on your platform). On Windows, this will set the SIO_KEEPALIVE_VALS option.

If None is specified then keepalive messages are disabled, otherwise the duration specified will be the time to remain idle before sending a TCP keepalive probe.

Some platforms specify this value in seconds, so sub-second specifications may be omitted.

fn ttl(&self) -> Result<u32>

Gets the value of the IP_TTL option for this socket.

For more information about this option, see set_ttl.

fn set_ttl(&self, ttl: u32) -> Result<()>

Sets the value for the IP_TTL option on this socket.

This value sets the time-to-live field that is used in every packet sent from this socket.

fn linger(&self) -> Result<Option<Duration>>

Reads the linger duration for this socket by getting the SO_LINGER option.

For more information about this option, see set_linger.

fn set_linger(&self, dur: Option<Duration>) -> Result<()>

Sets the linger duration of this socket by setting the SO_LINGER option.

This option controls the action taken when a stream has unsent messages and the stream is closed. If SO_LINGER is set, the system shall block the process until it can transmit the data or until the time expires.

If SO_LINGER is not specified, and the stream is closed, the system handles the call in a way that allows the process to continue as quickly as possible.

Trait Implementations

impl AsRawFd for TcpStream

fn as_raw_fd(&self) -> RawFd

Extracts the raw file descriptor.

impl Read for TcpStream

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

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

unsafe fn initializer(&self) -> Initializer

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

Determines if this Reader can work with buffers of uninitialized memory.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

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

Read the exact number of bytes required to fill buf.

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

Creates a "by reference" adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

fn chars(self) -> Chars<Self>

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

the semantics of a partial read/write of where errors happen is currently unclear and may change

Transforms this Read instance to an [Iterator] over [char]s.

fn chain<R>(self, next: R) -> Chain<Self, R> where
    R: Read, 

Creates an adaptor which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.

impl Write for TcpStream

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

Write a buffer into this object, returning how many bytes were written.

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

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

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

Attempts to write an entire buffer into this write.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

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

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

Creates a "by reference" adaptor for this instance of Write.

impl AsyncRead for TcpStream

unsafe fn prepare_uninitialized_buffer(&self, _: &mut [u8]) -> bool

Prepares an uninitialized buffer to be safe to pass to read. Returns true if the supplied buffer was zeroed out.

fn read_buf<B: BufMut>(&mut self, buf: &mut B) -> Poll<usize, Error>

Pull some bytes from this source into the specified Buf, returning how many bytes were read.

fn framed<T>(self, codec: T) -> Framed<Self, T> where
    Self: AsyncWrite,
    T: Decoder + Encoder, 

Provides a Stream and Sink interface for reading and writing to this Io object, using Decode and Encode to read and write the raw data.

fn split(self) -> (ReadHalf<Self>, WriteHalf<Self>) where
    Self: AsyncWrite, 

Helper method for splitting this read/write object into two halves.

impl AsyncWrite for TcpStream

fn shutdown(&mut self) -> Poll<(), Error>

Initiates or attempts to shut down this writer, returning success when the I/O connection has completely shut down.

fn write_buf<B: Buf>(&mut self, buf: &mut B) -> Poll<usize, Error>

Write a Buf into this value, returning how many bytes were written.

impl Debug for TcpStream

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.