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Showing content from https://doc.rust-lang.org/std/os/unix/net/struct.UnixDatagram.html below:

UnixDatagram in std::os::unix::net - Rust

pub struct UnixDatagram();

A Unix datagram socket.

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(())
}

Creates a Unix datagram socket bound to the given path.

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
    }
};

Creates a Unix datagram socket bound to an address.

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(())
}

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

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

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

Creates an unnamed pair of connected sockets.

Returns two UnixDatagramss which are connected to each other.

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
    }
};

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.

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(())
}

Connects the socket to an address.

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(())
}

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.

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(())
}

Returns the address of this socket.

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(())
}

Returns the address of this socket’s peer.

The connect method will connect the socket to a peer.

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(())
}

Receives data from the socket.

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

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(())
}

Receives data from the socket.

On success, returns the number of bytes read.

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(())
}

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.

#![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(())
}

Receives data and ancillary data from socket.

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

#![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(())
}

Sends data on the socket to the specified address.

On success, returns the number of bytes written.

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(())
}

Sends data on the socket to the specified SocketAddr.

On success, returns the number of bytes written.

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(())
}

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.

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(())
}

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

On success, returns the number of bytes written.

#![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(())
}

Sends data and ancillary data on the socket.

On success, returns the number of bytes written.

#![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(())
}

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.

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(())
}

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(())
}

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.

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(())
}

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(())
}

Returns the read timeout of this socket.

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(())
}

Returns the write timeout of this socket.

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(())
}

Moves the socket into or out of nonblocking mode.

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(())
}

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(())
}

Returns the value of the SO_ERROR option.

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(())
}

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(())
}

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.

#![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(())
}

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.

#![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(())
}

Converts to this type from the input type.

Constructs a new instance of

from the given raw file descriptor.

Consumes this object, returning the raw underlying file descriptor.

Query the current setting of socket option SO_PASSCRED.

Enable or disable socket option

.

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