1.0.0[−][src]Struct std::net::TcpListener
A TCP socket server, listening for connections.
After creating a TcpListener
by bind
ing it to a socket address, it listens
for incoming TCP connections. These can be accepted by calling accept
or by
iterating over the Incoming
iterator returned by incoming
.
The socket will be closed when the value is dropped.
The Transmission Control Protocol is specified in IETF RFC 793.
Examples
use std::net::{TcpListener, TcpStream}; fn handle_client(stream: TcpStream) { // ... } fn main() -> io::Result<()> { let listener = TcpListener::bind("127.0.0.1:80")?; // accept connections and process them serially for stream in listener.incoming() { handle_client(stream?); } Ok(()) }Run
Methods
impl TcpListener
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pub fn bind<A: ToSocketAddrs>(addr: A) -> Result<TcpListener>
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Creates a new TcpListener
which will be bound to the specified
address.
The returned listener is ready for accepting connections.
Binding with a port number of 0 will request that the OS assigns a port
to this listener. The port allocated can be queried via the
local_addr
method.
The address type can be any implementor of ToSocketAddrs
trait. See
its documentation for concrete examples.
If addr
yields multiple addresses, bind
will be attempted with
each of the addresses until one succeeds and returns the listener. If
none of the addresses succeed in creating a listener, the error returned
from the last attempt (the last address) is returned.
Examples
Creates a TCP listener bound to 127.0.0.1:80
:
use std::net::TcpListener; let listener = TcpListener::bind("127.0.0.1:80").unwrap();Run
Creates a TCP listener bound to 127.0.0.1:80
. If that fails, create a
TCP listener bound to 127.0.0.1:443
:
use std::net::{SocketAddr, TcpListener}; let addrs = [ SocketAddr::from(([127, 0, 0, 1], 80)), SocketAddr::from(([127, 0, 0, 1], 443)), ]; let listener = TcpListener::bind(&addrs[..]).unwrap();Run
pub fn local_addr(&self) -> Result<SocketAddr>
[src]
Returns the local socket address of this listener.
Examples
use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4, TcpListener}; let listener = TcpListener::bind("127.0.0.1:8080").unwrap(); assert_eq!(listener.local_addr().unwrap(), SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080)));Run
pub fn try_clone(&self) -> Result<TcpListener>
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Creates a new independently owned handle to the underlying socket.
The returned TcpListener
is a reference to the same socket that this
object references. Both handles can be used to accept incoming
connections and options set on one listener will affect the other.
Examples
use std::net::TcpListener; let listener = TcpListener::bind("127.0.0.1:8080").unwrap(); let listener_clone = listener.try_clone().unwrap();Run
pub fn accept(&self) -> Result<(TcpStream, SocketAddr)>
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Accept a new incoming connection from this listener.
This function will block the calling thread until a new TCP connection
is established. When established, the corresponding TcpStream
and the
remote peer's address will be returned.
Examples
use std::net::TcpListener; let listener = TcpListener::bind("127.0.0.1:8080").unwrap(); match listener.accept() { Ok((_socket, addr)) => println!("new client: {:?}", addr), Err(e) => println!("couldn't get client: {:?}", e), }Run
ⓘImportant traits for Incoming<'a>pub fn incoming(&self) -> Incoming
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Returns an iterator over the connections being received on this listener.
The returned iterator will never return None
and will also not yield
the peer's SocketAddr
structure. Iterating over it is equivalent to
calling accept
in a loop.
Examples
use std::net::TcpListener; let listener = TcpListener::bind("127.0.0.1:80").unwrap(); for stream in listener.incoming() { match stream { Ok(stream) => { println!("new client!"); } Err(e) => { /* connection failed */ } } }Run
pub fn set_ttl(&self, ttl: u32) -> Result<()>
1.9.0[src]
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.
Examples
use std::net::TcpListener; let listener = TcpListener::bind("127.0.0.1:80").unwrap(); listener.set_ttl(100).expect("could not set TTL");Run
pub fn ttl(&self) -> Result<u32>
1.9.0[src]
Gets the value of the IP_TTL
option for this socket.
For more information about this option, see set_ttl
.
Examples
use std::net::TcpListener; let listener = TcpListener::bind("127.0.0.1:80").unwrap(); listener.set_ttl(100).expect("could not set TTL"); assert_eq!(listener.ttl().unwrap_or(0), 100);Run
pub fn set_only_v6(&self, only_v6: bool) -> Result<()>
1.9.0[src]
this option can only be set before the socket is bound
pub fn only_v6(&self) -> Result<bool>
1.9.0[src]
this option can only be set before the socket is bound
pub fn take_error(&self) -> Result<Option<Error>>
1.9.0[src]
Gets the value of the SO_ERROR
option on this socket.
This will retrieve the stored error in the underlying socket, clearing the field in the process. This can be useful for checking errors between calls.
Examples
use std::net::TcpListener; let listener = TcpListener::bind("127.0.0.1:80").unwrap(); listener.take_error().expect("No error was expected");Run
pub fn set_nonblocking(&self, nonblocking: bool) -> Result<()>
1.9.0[src]
Moves this TCP stream into or out of nonblocking mode.
This will result in the accept
operation becoming nonblocking,
i.e., immediately returning from their calls. If the IO operation is
successful, Ok
is returned and no further action is required. If the
IO operation could not be completed and needs to be retried, an error
with kind io::ErrorKind::WouldBlock
is returned.
On Unix platforms, calling this method corresponds to calling fcntl
FIONBIO
. On Windows calling this method corresponds to calling
ioctlsocket
FIONBIO
.
Examples
Bind a TCP listener to an address, listen for connections, and read bytes in nonblocking mode:
use std::io; use std::net::TcpListener; let listener = TcpListener::bind("127.0.0.1:7878").unwrap(); listener.set_nonblocking(true).expect("Cannot set non-blocking"); for stream in listener.incoming() { match stream { Ok(s) => { // do something with the TcpStream handle_connection(s); } Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => { // wait until network socket is ready, typically implemented // via platform-specific APIs such as epoll or IOCP wait_for_fd(); continue; } Err(e) => panic!("encountered IO error: {}", e), } }Run
Trait Implementations
impl AsRawFd for TcpListener
[src]
impl FromRawFd for TcpListener
1.1.0[src]
unsafe fn from_raw_fd(fd: RawFd) -> TcpListener
[src]
impl IntoRawFd for TcpListener
1.4.0[src]
fn into_raw_fd(self) -> RawFd
[src]
impl AsRawSocket for TcpListener
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fn as_raw_socket(&self) -> RawSocket
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impl FromRawSocket for TcpListener
1.1.0[src]
unsafe fn from_raw_socket(sock: RawSocket) -> TcpListener
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impl IntoRawSocket for TcpListener
1.4.0[src]
fn into_raw_socket(self) -> RawSocket
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impl Debug for TcpListener
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Auto Trait Implementations
impl Send for TcpListener
impl Sync for TcpListener
Blanket Implementations
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> From<T> for T
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Ffn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,