Struct std::os::unix::net::UnixDatagram

1.10.0 · source · [−]
pub struct UnixDatagram(_);
Available on Unix only.
Expand description

A Unix datagram socket.

Examples

use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let socket = UnixDatagram::bind("/path/to/my/socket")?;
    socket.send_to(b"hello world", "/path/to/other/socket")?;
    let mut buf = [0; 100];
    let (count, address) = socket.recv_from(&mut buf)?;
    println!("socket {:?} sent {:?}", address, &buf[..count]);
    Ok(())
}
Run

Implementations

Creates a Unix datagram socket bound to the given path.

Examples
use std::os::unix::net::UnixDatagram;

let sock = match UnixDatagram::bind("/path/to/the/socket") {
    Ok(sock) => sock,
    Err(e) => {
        println!("Couldn't bind: {e:?}");
        return
    }
};
Run
🔬This is a nightly-only experimental API. (unix_socket_abstract #85410)

Creates a Unix datagram socket bound to an address.

Examples
#![feature(unix_socket_abstract)]
use std::os::unix::net::{UnixDatagram};

fn main() -> std::io::Result<()> {
    let sock1 = UnixDatagram::bind("path/to/socket")?;
    let addr = sock1.local_addr()?;

    let sock2 = match UnixDatagram::bind_addr(&addr) {
        Ok(sock) => sock,
        Err(err) => {
            println!("Couldn't bind: {err:?}");
            return Err(err);
        }
    };
    Ok(())
}
Run

Creates a Unix Datagram socket which is not bound to any address.

Examples
use std::os::unix::net::UnixDatagram;

let sock = match UnixDatagram::unbound() {
    Ok(sock) => sock,
    Err(e) => {
        println!("Couldn't unbound: {e:?}");
        return
    }
};
Run

Creates an unnamed pair of connected sockets.

Returns two UnixDatagramss which are connected to each other.

Examples
use std::os::unix::net::UnixDatagram;

let (sock1, sock2) = match UnixDatagram::pair() {
    Ok((sock1, sock2)) => (sock1, sock2),
    Err(e) => {
        println!("Couldn't unbound: {e:?}");
        return
    }
};
Run

Connects the socket to the specified path address.

The send method may be used to send data to the specified address. recv and recv_from will only receive data from that address.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    match sock.connect("/path/to/the/socket") {
        Ok(sock) => sock,
        Err(e) => {
            println!("Couldn't connect: {e:?}");
            return Err(e)
        }
    };
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_abstract #85410)

Connects the socket to an address.

Examples
#![feature(unix_socket_abstract)]
use std::os::unix::net::{UnixDatagram};

fn main() -> std::io::Result<()> {
    let bound = UnixDatagram::bind("/path/to/socket")?;
    let addr = bound.local_addr()?;

    let sock = UnixDatagram::unbound()?;
    match sock.connect_addr(&addr) {
        Ok(sock) => sock,
        Err(e) => {
            println!("Couldn't connect: {e:?}");
            return Err(e)
        }
    };
    Ok(())
}
Run

Creates a new independently owned handle to the underlying socket.

The returned UnixDatagram 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 side will affect the other.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::bind("/path/to/the/socket")?;
    let sock_copy = sock.try_clone().expect("try_clone failed");
    Ok(())
}
Run

Returns the address of this socket.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::bind("/path/to/the/socket")?;
    let addr = sock.local_addr().expect("Couldn't get local address");
    Ok(())
}
Run

Returns the address of this socket’s peer.

The connect method will connect the socket to a peer.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.connect("/path/to/the/socket")?;

    let addr = sock.peer_addr().expect("Couldn't get peer address");
    Ok(())
}
Run

Receives data from the socket.

On success, returns the number of bytes read and the address from whence the data came.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    let mut buf = vec![0; 10];
    let (size, sender) = sock.recv_from(buf.as_mut_slice())?;
    println!("received {size} bytes from {sender:?}");
    Ok(())
}
Run

Receives data from the socket.

On success, returns the number of bytes read.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::bind("/path/to/the/socket")?;
    let mut buf = vec![0; 10];
    sock.recv(buf.as_mut_slice()).expect("recv function failed");
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_ancillary_data #76915)

Receives data and ancillary data from socket.

On success, returns the number of bytes read, if the data was truncated and the address from whence the msg came.

Examples
#![feature(unix_socket_ancillary_data)]
use std::os::unix::net::{UnixDatagram, SocketAncillary, AncillaryData};
use std::io::IoSliceMut;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    let mut buf1 = [1; 8];
    let mut buf2 = [2; 16];
    let mut buf3 = [3; 8];
    let mut bufs = &mut [
        IoSliceMut::new(&mut buf1),
        IoSliceMut::new(&mut buf2),
        IoSliceMut::new(&mut buf3),
    ][..];
    let mut fds = [0; 8];
    let mut ancillary_buffer = [0; 128];
    let mut ancillary = SocketAncillary::new(&mut ancillary_buffer[..]);
    let (size, _truncated, sender) = sock.recv_vectored_with_ancillary_from(bufs, &mut ancillary)?;
    println!("received {size}");
    for ancillary_result in ancillary.messages() {
        if let AncillaryData::ScmRights(scm_rights) = ancillary_result.unwrap() {
            for fd in scm_rights {
                println!("receive file descriptor: {fd}");
            }
        }
    }
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_ancillary_data #76915)

Receives data and ancillary data from socket.

On success, returns the number of bytes read and if the data was truncated.

Examples
#![feature(unix_socket_ancillary_data)]
use std::os::unix::net::{UnixDatagram, SocketAncillary, AncillaryData};
use std::io::IoSliceMut;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    let mut buf1 = [1; 8];
    let mut buf2 = [2; 16];
    let mut buf3 = [3; 8];
    let mut bufs = &mut [
        IoSliceMut::new(&mut buf1),
        IoSliceMut::new(&mut buf2),
        IoSliceMut::new(&mut buf3),
    ][..];
    let mut fds = [0; 8];
    let mut ancillary_buffer = [0; 128];
    let mut ancillary = SocketAncillary::new(&mut ancillary_buffer[..]);
    let (size, _truncated) = sock.recv_vectored_with_ancillary(bufs, &mut ancillary)?;
    println!("received {size}");
    for ancillary_result in ancillary.messages() {
        if let AncillaryData::ScmRights(scm_rights) = ancillary_result.unwrap() {
            for fd in scm_rights {
                println!("receive file descriptor: {fd}");
            }
        }
    }
    Ok(())
}
Run

Sends data on the socket to the specified address.

On success, returns the number of bytes written.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.send_to(b"omelette au fromage", "/some/sock").expect("send_to function failed");
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_abstract #85410)

Sends data on the socket to the specified SocketAddr.

On success, returns the number of bytes written.

Examples
#![feature(unix_socket_abstract)]
use std::os::unix::net::{UnixDatagram};

fn main() -> std::io::Result<()> {
    let bound = UnixDatagram::bind("/path/to/socket")?;
    let addr = bound.local_addr()?;

    let sock = UnixDatagram::unbound()?;
    sock.send_to_addr(b"bacon egg and cheese", &addr).expect("send_to_addr function failed");
    Ok(())
}
Run

Sends data on the socket to the socket’s peer.

The peer address may be set by the connect method, and this method will return an error if the socket has not already been connected.

On success, returns the number of bytes written.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.connect("/some/sock").expect("Couldn't connect");
    sock.send(b"omelette au fromage").expect("send_to function failed");
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_ancillary_data #76915)

Sends data and ancillary data on the socket to the specified address.

On success, returns the number of bytes written.

Examples
#![feature(unix_socket_ancillary_data)]
use std::os::unix::net::{UnixDatagram, SocketAncillary};
use std::io::IoSlice;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    let buf1 = [1; 8];
    let buf2 = [2; 16];
    let buf3 = [3; 8];
    let bufs = &[
        IoSlice::new(&buf1),
        IoSlice::new(&buf2),
        IoSlice::new(&buf3),
    ][..];
    let fds = [0, 1, 2];
    let mut ancillary_buffer = [0; 128];
    let mut ancillary = SocketAncillary::new(&mut ancillary_buffer[..]);
    ancillary.add_fds(&fds[..]);
    sock.send_vectored_with_ancillary_to(bufs, &mut ancillary, "/some/sock")
        .expect("send_vectored_with_ancillary_to function failed");
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_ancillary_data #76915)

Sends data and ancillary data on the socket.

On success, returns the number of bytes written.

Examples
#![feature(unix_socket_ancillary_data)]
use std::os::unix::net::{UnixDatagram, SocketAncillary};
use std::io::IoSlice;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    let buf1 = [1; 8];
    let buf2 = [2; 16];
    let buf3 = [3; 8];
    let bufs = &[
        IoSlice::new(&buf1),
        IoSlice::new(&buf2),
        IoSlice::new(&buf3),
    ][..];
    let fds = [0, 1, 2];
    let mut ancillary_buffer = [0; 128];
    let mut ancillary = SocketAncillary::new(&mut ancillary_buffer[..]);
    ancillary.add_fds(&fds[..]);
    sock.send_vectored_with_ancillary(bufs, &mut ancillary)
        .expect("send_vectored_with_ancillary function failed");
    Ok(())
}
Run

Sets the read timeout for the socket.

If the provided value is None, then recv and recv_from calls will block indefinitely. An Err is returned if the zero Duration is passed to this method.

Examples
use std::os::unix::net::UnixDatagram;
use std::time::Duration;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.set_read_timeout(Some(Duration::new(1, 0)))
        .expect("set_read_timeout function failed");
    Ok(())
}
Run

An Err is returned if the zero Duration is passed to this method:

use std::io;
use std::os::unix::net::UnixDatagram;
use std::time::Duration;

fn main() -> std::io::Result<()> {
    let socket = UnixDatagram::unbound()?;
    let result = socket.set_read_timeout(Some(Duration::new(0, 0)));
    let err = result.unwrap_err();
    assert_eq!(err.kind(), io::ErrorKind::InvalidInput);
    Ok(())
}
Run

Sets the write timeout for the socket.

If the provided value is None, then send and send_to calls will block indefinitely. An Err is returned if the zero Duration is passed to this method.

Examples
use std::os::unix::net::UnixDatagram;
use std::time::Duration;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.set_write_timeout(Some(Duration::new(1, 0)))
        .expect("set_write_timeout function failed");
    Ok(())
}
Run

An Err is returned if the zero Duration is passed to this method:

use std::io;
use std::os::unix::net::UnixDatagram;
use std::time::Duration;

fn main() -> std::io::Result<()> {
    let socket = UnixDatagram::unbound()?;
    let result = socket.set_write_timeout(Some(Duration::new(0, 0)));
    let err = result.unwrap_err();
    assert_eq!(err.kind(), io::ErrorKind::InvalidInput);
    Ok(())
}
Run

Returns the read timeout of this socket.

Examples
use std::os::unix::net::UnixDatagram;
use std::time::Duration;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.set_read_timeout(Some(Duration::new(1, 0)))
        .expect("set_read_timeout function failed");
    assert_eq!(sock.read_timeout()?, Some(Duration::new(1, 0)));
    Ok(())
}
Run

Returns the write timeout of this socket.

Examples
use std::os::unix::net::UnixDatagram;
use std::time::Duration;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.set_write_timeout(Some(Duration::new(1, 0)))
        .expect("set_write_timeout function failed");
    assert_eq!(sock.write_timeout()?, Some(Duration::new(1, 0)));
    Ok(())
}
Run

Moves the socket into or out of nonblocking mode.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.set_nonblocking(true).expect("set_nonblocking function failed");
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_ancillary_data #76915)

Moves the socket to pass unix credentials as control message in SocketAncillary.

Set the socket option SO_PASSCRED.

Examples
#![feature(unix_socket_ancillary_data)]
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.set_passcred(true).expect("set_passcred function failed");
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_ancillary_data #76915)

Get the current value of the socket for passing unix credentials in SocketAncillary. This value can be change by set_passcred.

Get the socket option SO_PASSCRED.

🔬This is a nightly-only experimental API. (unix_set_mark #96467)

Set the id of the socket for network filtering purpose

#![feature(unix_set_mark)]
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.set_mark(32)?;
    Ok(())
}
Run

Returns the value of the SO_ERROR option.

Examples
use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    if let Ok(Some(err)) = sock.take_error() {
        println!("Got error: {err:?}");
    }
    Ok(())
}
Run

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

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

use std::os::unix::net::UnixDatagram;
use std::net::Shutdown;

fn main() -> std::io::Result<()> {
    let sock = UnixDatagram::unbound()?;
    sock.shutdown(Shutdown::Both).expect("shutdown function failed");
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_peek #76923)

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.

Examples
#![feature(unix_socket_peek)]

use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let socket = UnixDatagram::bind("/tmp/sock")?;
    let mut buf = [0; 10];
    let len = socket.peek(&mut buf).expect("peek failed");
    Ok(())
}
Run
🔬This is a nightly-only experimental API. (unix_socket_peek #76923)

Receives a single datagram message on the socket, without removing it from the queue. On success, returns the number of bytes read and the origin.

The function must be called with valid byte array buf of sufficient size to hold the message bytes. If a message is too long to fit in the supplied buffer, excess bytes may be discarded.

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

Do not use this function to implement busy waiting, instead use libc::poll to synchronize IO events on one or more sockets.

Examples
#![feature(unix_socket_peek)]

use std::os::unix::net::UnixDatagram;

fn main() -> std::io::Result<()> {
    let socket = UnixDatagram::bind("/tmp/sock")?;
    let mut buf = [0; 10];
    let (len, addr) = socket.peek_from(&mut buf).expect("peek failed");
    Ok(())
}
Run

Trait Implementations

Borrows the file descriptor. Read more

Extracts the raw file descriptor. Read more

Formats the value using the given formatter. Read more

Converts to this type from the input type.

Converts to this type from the input type.

Constructs a new instance of Self from the given raw file descriptor. Read more

Consumes this object, returning the raw underlying file descriptor. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.