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use async_trait::async_trait;
use futures_util::SinkExt;
use karyon_core::async_runtime::{
io::{split, ReadHalf, WriteHalf},
lock::Mutex,
net::{UnixListener as AsyncUnixListener, UnixStream},
};
use crate::{
codec::Codec,
connection::{Conn, Connection, ToConn},
endpoint::Endpoint,
listener::{ConnListener, Listener, ToListener},
stream::{ReadStream, WriteStream},
Error, Result,
};
/// Unix Conn config
#[derive(Clone, Default)]
pub struct UnixConfig {}
/// Unix domain socket implementation of the [`Connection`] trait.
pub struct UnixConn<C> {
read_stream: Mutex<ReadStream<ReadHalf<UnixStream>, C>>,
write_stream: Mutex<WriteStream<WriteHalf<UnixStream>, C>>,
peer_endpoint: Option<Endpoint>,
local_endpoint: Option<Endpoint>,
}
impl<C> UnixConn<C>
where
C: Codec + Clone,
{
/// Creates a new TcpConn
pub fn new(conn: UnixStream, codec: C) -> Self {
let peer_endpoint = conn
.peer_addr()
.and_then(|a| {
Ok(Endpoint::new_unix_addr(
a.as_pathname()
.ok_or(std::io::ErrorKind::AddrNotAvailable)?,
))
})
.ok();
let local_endpoint = conn
.local_addr()
.and_then(|a| {
Ok(Endpoint::new_unix_addr(
a.as_pathname()
.ok_or(std::io::ErrorKind::AddrNotAvailable)?,
))
})
.ok();
let (read, write) = split(conn);
let read_stream = Mutex::new(ReadStream::new(read, codec.clone()));
let write_stream = Mutex::new(WriteStream::new(write, codec));
Self {
read_stream,
write_stream,
peer_endpoint,
local_endpoint,
}
}
}
#[async_trait]
impl<C> Connection for UnixConn<C>
where
C: Codec + Clone,
{
type Item = C::Item;
fn peer_endpoint(&self) -> Result<Endpoint> {
self.peer_endpoint
.clone()
.ok_or(Error::IO(std::io::ErrorKind::AddrNotAvailable.into()))
}
fn local_endpoint(&self) -> Result<Endpoint> {
self.local_endpoint
.clone()
.ok_or(Error::IO(std::io::ErrorKind::AddrNotAvailable.into()))
}
async fn recv(&self) -> Result<Self::Item> {
self.read_stream.lock().await.recv().await
}
async fn send(&self, msg: Self::Item) -> Result<()> {
self.write_stream.lock().await.send(msg).await
}
}
#[allow(dead_code)]
pub struct UnixListener<C> {
inner: AsyncUnixListener,
config: UnixConfig,
codec: C,
}
impl<C> UnixListener<C>
where
C: Codec + Clone,
{
pub fn new(listener: AsyncUnixListener, config: UnixConfig, codec: C) -> Self {
Self {
inner: listener,
config,
codec,
}
}
}
#[async_trait]
impl<C> ConnListener for UnixListener<C>
where
C: Codec + Clone,
{
type Item = C::Item;
fn local_endpoint(&self) -> Result<Endpoint> {
self.inner
.local_addr()
.and_then(|a| {
Ok(Endpoint::new_unix_addr(
a.as_pathname()
.ok_or(std::io::ErrorKind::AddrNotAvailable)?,
))
})
.map_err(Error::from)
}
async fn accept(&self) -> Result<Conn<C::Item>> {
let (conn, _) = self.inner.accept().await?;
Ok(Box::new(UnixConn::new(conn, self.codec.clone())))
}
}
/// Connects to the given Unix socket path.
pub async fn dial<C>(endpoint: &Endpoint, _config: UnixConfig, codec: C) -> Result<UnixConn<C>>
where
C: Codec + Clone,
{
let path: std::path::PathBuf = endpoint.clone().try_into()?;
let conn = UnixStream::connect(path).await?;
Ok(UnixConn::new(conn, codec))
}
/// Listens on the given Unix socket path.
pub fn listen<C>(endpoint: &Endpoint, config: UnixConfig, codec: C) -> Result<UnixListener<C>>
where
C: Codec + Clone,
{
let path: std::path::PathBuf = endpoint.clone().try_into()?;
let listener = AsyncUnixListener::bind(path)?;
Ok(UnixListener::new(listener, config, codec))
}
// impl From<UnixStream> for Box<dyn Connection> {
// fn from(conn: UnixStream) -> Self {
// Box::new(UnixConn::new(conn))
// }
// }
impl<C> From<UnixListener<C>> for Listener<C::Item>
where
C: Codec + Clone,
{
fn from(listener: UnixListener<C>) -> Self {
Box::new(listener)
}
}
impl<C> ToConn for UnixConn<C>
where
C: Codec + Clone,
{
type Item = C::Item;
fn to_conn(self) -> Conn<Self::Item> {
Box::new(self)
}
}
impl<C> ToListener for UnixListener<C>
where
C: Codec + Clone,
{
type Item = C::Item;
fn to_listener(self) -> Listener<Self::Item> {
self.into()
}
}
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