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use async_trait::async_trait;
use smol::{
io::{split, AsyncReadExt, AsyncWriteExt, ReadHalf, WriteHalf},
lock::Mutex,
net::unix::{UnixListener, UnixStream},
};
use crate::{
connection::{Connection, ToConn},
endpoint::Endpoint,
listener::{ConnListener, ToListener},
Error, Result,
};
/// Unix domain socket implementation of the [`Connection`] trait.
pub struct UnixConn {
inner: UnixStream,
read: Mutex<ReadHalf<UnixStream>>,
write: Mutex<WriteHalf<UnixStream>>,
}
impl UnixConn {
/// Creates a new UnixConn
pub fn new(conn: UnixStream) -> Self {
let (read, write) = split(conn.clone());
Self {
inner: conn,
read: Mutex::new(read),
write: Mutex::new(write),
}
}
}
#[async_trait]
impl Connection for UnixConn {
fn peer_endpoint(&self) -> Result<Endpoint> {
Ok(Endpoint::new_unix_addr(&self.inner.peer_addr()?))
}
fn local_endpoint(&self) -> Result<Endpoint> {
Ok(Endpoint::new_unix_addr(&self.inner.local_addr()?))
}
async fn read(&self, buf: &mut [u8]) -> Result<usize> {
self.read.lock().await.read(buf).await.map_err(Error::from)
}
async fn write(&self, buf: &[u8]) -> Result<usize> {
self.write
.lock()
.await
.write(buf)
.await
.map_err(Error::from)
}
}
#[async_trait]
impl ConnListener for UnixListener {
fn local_endpoint(&self) -> Result<Endpoint> {
Ok(Endpoint::new_unix_addr(&self.local_addr()?))
}
async fn accept(&self) -> Result<Box<dyn Connection>> {
let (conn, _) = self.accept().await?;
Ok(Box::new(UnixConn::new(conn)))
}
}
/// Connects to the given Unix socket path.
pub async fn dial(path: &String) -> Result<UnixConn> {
let conn = UnixStream::connect(path).await?;
Ok(UnixConn::new(conn))
}
/// Listens on the given Unix socket path.
pub fn listen(path: &String) -> Result<UnixListener> {
let listener = UnixListener::bind(path)?;
Ok(listener)
}
impl From<UnixStream> for Box<dyn Connection> {
fn from(conn: UnixStream) -> Self {
Box::new(UnixConn::new(conn))
}
}
impl From<UnixListener> for Box<dyn ConnListener> {
fn from(listener: UnixListener) -> Self {
Box::new(listener)
}
}
impl ToConn for UnixStream {
fn to_conn(self) -> Box<dyn Connection> {
self.into()
}
}
impl ToConn for UnixConn {
fn to_conn(self) -> Box<dyn Connection> {
Box::new(self)
}
}
impl ToListener for UnixListener {
fn to_listener(self) -> Box<dyn ConnListener> {
self.into()
}
}
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