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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,
endpoint::{Addr, Endpoint, Port},
listener::Listener,
Result,
};
/// TCP network connection implementations 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 recv(&self, buf: &mut [u8]) -> Result<usize> {
self.read.lock().await.read_exact(buf).await?;
Ok(buf.len())
}
async fn send(&self, buf: &[u8]) -> Result<usize> {
self.write.lock().await.write_all(buf).await?;
Ok(buf.len())
}
}
#[async_trait]
impl Listener 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)
}
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