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use {RecvDgram, SendDgram};
use tokio_reactor::{Handle, PollEvented};
use futures::{Async, Poll};
use mio::Ready;
use mio_uds;
use std::fmt;
use std::io;
use std::net::Shutdown;
use std::os::unix::io::{AsRawFd, RawFd};
use std::os::unix::net::{self, SocketAddr};
use std::path::Path;
/// An I/O object representing a Unix datagram socket.
pub struct UnixDatagram {
io: PollEvented<mio_uds::UnixDatagram>,
}
impl UnixDatagram {
/// Creates a new `UnixDatagram` bound to the specified path.
pub fn bind<P>(path: P) -> io::Result<UnixDatagram>
where
P: AsRef<Path>,
{
let socket = mio_uds::UnixDatagram::bind(path)?;
Ok(UnixDatagram::new(socket))
}
/// Creates an unnamed pair of connected sockets.
///
/// This function will create a pair of interconnected Unix sockets for
/// communicating back and forth between one another. Each socket will
/// be associated with the default event loop's handle.
pub fn pair() -> io::Result<(UnixDatagram, UnixDatagram)> {
let (a, b) = mio_uds::UnixDatagram::pair()?;
let a = UnixDatagram::new(a);
let b = UnixDatagram::new(b);
Ok((a, b))
}
/// Consumes a `UnixDatagram` in the standard library and returns a
/// nonblocking `UnixDatagram` from this crate.
///
/// The returned datagram will be associated with the given event loop
/// specified by `handle` and is ready to perform I/O.
pub fn from_std(datagram: net::UnixDatagram, handle: &Handle) -> io::Result<UnixDatagram> {
let socket = mio_uds::UnixDatagram::from_datagram(datagram)?;
let io = PollEvented::new_with_handle(socket, handle)?;
Ok(UnixDatagram { io })
}
fn new(socket: mio_uds::UnixDatagram) -> UnixDatagram {
let io = PollEvented::new(socket);
UnixDatagram { io }
}
/// Creates a new `UnixDatagram` which is not bound to any address.
pub fn unbound() -> io::Result<UnixDatagram> {
let socket = mio_uds::UnixDatagram::unbound()?;
Ok(UnixDatagram::new(socket))
}
/// Connects the socket to the specified 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.
pub fn connect<P: AsRef<Path>>(&self, path: P) -> io::Result<()> {
self.io.get_ref().connect(path)
}
/// Test whether this socket is ready to be read or not.
pub fn poll_read_ready(&self, ready: Ready) -> Poll<Ready, io::Error> {
self.io.poll_read_ready(ready)
}
/// Test whether this socket is ready to be written to or not.
pub fn poll_write_ready(&self) -> Poll<Ready, io::Error> {
self.io.poll_write_ready()
}
/// Returns the local address that this socket is bound to.
pub fn local_addr(&self) -> io::Result<SocketAddr> {
self.io.get_ref().local_addr()
}
/// Returns the address of this socket's peer.
///
/// The `connect` method will connect the socket to a peer.
pub fn peer_addr(&self) -> io::Result<SocketAddr> {
self.io.get_ref().peer_addr()
}
/// Receives data from the socket.
///
/// On success, returns the number of bytes read and the address from
/// whence the data came.
pub fn poll_recv_from(&self, buf: &mut [u8]) -> Poll<(usize, SocketAddr), io::Error> {
try_ready!(self.io.poll_read_ready(Ready::readable()));
match self.io.get_ref().recv_from(buf) {
Ok(ret) => Ok(ret.into()),
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
self.io.clear_read_ready(Ready::readable())?;
Ok(Async::NotReady)
}
Err(e) => Err(e),
}
}
/// Receives data from the socket.
///
/// On success, returns the number of bytes read.
pub fn poll_recv(&self, buf: &mut [u8]) -> Poll<usize, io::Error> {
try_ready!(self.io.poll_read_ready(Ready::readable()));
match self.io.get_ref().recv(buf) {
Ok(ret) => Ok(ret.into()),
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
self.io.clear_read_ready(Ready::readable())?;
Ok(Async::NotReady)
}
Err(e) => Err(e),
}
}
/// Returns a future for receiving a datagram. See the documentation on RecvDgram for details.
pub fn recv_dgram<T>(self, buf: T) -> RecvDgram<T>
where
T: AsMut<[u8]>,
{
RecvDgram::new(self, buf)
}
/// Sends data on the socket to the specified address.
///
/// On success, returns the number of bytes written.
pub fn poll_send_to<P>(&self, buf: &[u8], path: P) -> Poll<usize, io::Error>
where
P: AsRef<Path>,
{
try_ready!(self.io.poll_write_ready());
match self.io.get_ref().send_to(buf, path) {
Ok(ret) => Ok(ret.into()),
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
self.io.clear_write_ready()?;
Ok(Async::NotReady)
}
Err(e) => Err(e),
}
}
/// 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.
pub fn poll_send(&self, buf: &[u8]) -> Poll<usize, io::Error> {
try_ready!(self.io.poll_write_ready());
match self.io.get_ref().send(buf) {
Ok(ret) => Ok(ret.into()),
Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
self.io.clear_write_ready()?;
Ok(Async::NotReady)
}
Err(e) => Err(e),
}
}
/// Returns a future sending the data in buf to the socket at path.
pub fn send_dgram<T, P>(self, buf: T, path: P) -> SendDgram<T, P>
where
T: AsRef<[u8]>,
P: AsRef<Path>,
{
SendDgram::new(self, buf, path)
}
/// Returns the value of the `SO_ERROR` option.
pub fn take_error(&self) -> io::Result<Option<io::Error>> {
self.io.get_ref().take_error()
}
/// 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`).
pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
self.io.get_ref().shutdown(how)
}
}
impl fmt::Debug for UnixDatagram {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.io.get_ref().fmt(f)
}
}
impl AsRawFd for UnixDatagram {
fn as_raw_fd(&self) -> RawFd {
self.io.get_ref().as_raw_fd()
}
}