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use async_trait::async_trait;
use smol::{
io::{split, AsyncReadExt, AsyncWriteExt, ReadHalf, WriteHalf},
lock::Mutex,
net::{TcpListener, TcpStream},
};
use crate::{
connection::{Connection, ToConn},
endpoint::{Addr, Endpoint, Port},
listener::{ConnListener, ToListener},
Error, Result,
};
/// TCP network connection implementation of the [`Connection`] trait.
pub struct TcpConn {
inner: TcpStream,
read: Mutex<ReadHalf<TcpStream>>,
write: Mutex<WriteHalf<TcpStream>>,
}
impl TcpConn {
/// Creates a new TcpConn
pub fn new(conn: TcpStream) -> Self {
let (read, write) = split(conn.clone());
Self {
inner: conn,
read: Mutex::new(read),
write: Mutex::new(write),
}
}
}
#[async_trait]
impl Connection for TcpConn {
fn peer_endpoint(&self) -> Result<Endpoint> {
Ok(Endpoint::new_tcp_addr(&self.inner.peer_addr()?))
}
fn local_endpoint(&self) -> Result<Endpoint> {
Ok(Endpoint::new_tcp_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 TcpListener {
fn local_endpoint(&self) -> Result<Endpoint> {
Ok(Endpoint::new_tcp_addr(&self.local_addr()?))
}
async fn accept(&self) -> Result<Box<dyn Connection>> {
let (conn, _) = self.accept().await?;
conn.set_nodelay(true)?;
Ok(Box::new(TcpConn::new(conn)))
}
}
/// Connects to the given TCP address and port.
pub async fn dial_tcp(addr: &Addr, port: &Port) -> Result<TcpConn> {
let address = format!("{}:{}", addr, port);
let conn = TcpStream::connect(address).await?;
conn.set_nodelay(true)?;
Ok(TcpConn::new(conn))
}
/// Listens on the given TCP address and port.
pub async fn listen_tcp(addr: &Addr, port: &Port) -> Result<TcpListener> {
let address = format!("{}:{}", addr, port);
let listener = TcpListener::bind(address).await?;
Ok(listener)
}
impl From<TcpStream> for Box<dyn Connection> {
fn from(conn: TcpStream) -> Self {
Box::new(TcpConn::new(conn))
}
}
impl From<TcpListener> for Box<dyn ConnListener> {
fn from(listener: TcpListener) -> Self {
Box::new(listener)
}
}
impl ToConn for TcpStream {
fn to_conn(self) -> Box<dyn Connection> {
self.into()
}
}
impl ToConn for TcpConn {
fn to_conn(self) -> Box<dyn Connection> {
Box::new(self)
}
}
impl ToListener for TcpListener {
fn to_listener(self) -> Box<dyn ConnListener> {
self.into()
}
}
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