4 files changed, 235 insertions, 0 deletions
diff --git a/net/src/transports/mod.rs b/net/src/transports/mod.rs
new file mode 100644
index 0000000..f399133
--- /dev/null
+++ b/net/src/transports/mod.rs
@@ -0,0 +1,3 @@
+pub mod tcp;
+pub mod udp;
+pub mod unix;
diff --git a/net/src/transports/tcp.rs b/net/src/transports/tcp.rs
new file mode 100644
index 0000000..5ff7b28
--- /dev/null
+++ b/net/src/transports/tcp.rs
@@ -0,0 +1,82 @@
+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)
+}
diff --git a/net/src/transports/udp.rs b/net/src/transports/udp.rs
new file mode 100644
index 0000000..27fb9ae
--- /dev/null
+++ b/net/src/transports/udp.rs
@@ -0,0 +1,77 @@
+use std::net::SocketAddr;
+
+use async_trait::async_trait;
+use smol::net::UdpSocket;
+
+use crate::{
+    connection::Connection,
+    endpoint::{Addr, Endpoint, Port},
+    Result,
+};
+
+/// UDP network connection implementations of the `Connection` trait.
+pub struct UdpConn {
+    inner: UdpSocket,
+}
+
+impl UdpConn {
+    /// Creates a new UdpConn
+    pub fn new(conn: UdpSocket) -> Self {
+        Self { inner: conn }
+    }
+}
+
+impl UdpConn {
+    /// Receives a single datagram message. Returns the number of bytes read
+    /// and the origin endpoint.
+    pub async fn recv_from(&self, buf: &mut [u8]) -> Result<(usize, Endpoint)> {
+        let (size, addr) = self.inner.recv_from(buf).await?;
+        Ok((size, Endpoint::new_udp_addr(&addr)))
+    }
+
+    /// Sends data to the given address. Returns the number of bytes written.
+    pub async fn send_to(&self, buf: &[u8], addr: &Endpoint) -> Result<usize> {
+        let addr: SocketAddr = addr.clone().try_into()?;
+        let size = self.inner.send_to(buf, addr).await?;
+        Ok(size)
+    }
+}
+
+#[async_trait]
+impl Connection for UdpConn {
+    fn peer_endpoint(&self) -> Result<Endpoint> {
+        Ok(Endpoint::new_udp_addr(&self.inner.peer_addr()?))
+    }
+
+    fn local_endpoint(&self) -> Result<Endpoint> {
+        Ok(Endpoint::new_udp_addr(&self.inner.local_addr()?))
+    }
+
+    async fn recv(&self, buf: &mut [u8]) -> Result<usize> {
+        let size = self.inner.recv(buf).await?;
+        Ok(size)
+    }
+
+    async fn send(&self, buf: &[u8]) -> Result<usize> {
+        let size = self.inner.send(buf).await?;
+        Ok(size)
+    }
+}
+
+/// Connects to the given UDP address and port.
+pub async fn dial_udp(addr: &Addr, port: &Port) -> Result<UdpConn> {
+    let address = format!("{}:{}", addr, port);
+
+    // Let the operating system assign an available port to this socket
+    let conn = UdpSocket::bind("[::]:0").await?;
+    conn.connect(address).await?;
+    Ok(UdpConn::new(conn))
+}
+
+/// Listens on the given UDP address and port.
+pub async fn listen_udp(addr: &Addr, port: &Port) -> Result<UdpConn> {
+    let address = format!("{}:{}", addr, port);
+    let conn = UdpSocket::bind(address).await?;
+    let udp_conn = UdpConn::new(conn);
+    Ok(udp_conn)
+}
diff --git a/net/src/transports/unix.rs b/net/src/transports/unix.rs
new file mode 100644
index 0000000..c89832e
--- /dev/null
+++ b/net/src/transports/unix.rs
@@ -0,0 +1,73 @@
+use async_trait::async_trait;
+
+use smol::{
+    io::{split, AsyncReadExt, AsyncWriteExt, ReadHalf, WriteHalf},
+    lock::Mutex,
+    net::unix::{UnixListener, UnixStream},
+};
+
+use crate::{connection::Connection, endpoint::Endpoint, listener::Listener, Result};
+
+/// Unix domain socket implementations 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 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 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_unix(path: &String) -> Result<UnixConn> {
+    let conn = UnixStream::connect(path).await?;
+    Ok(UnixConn::new(conn))
+}
+
+/// Listens on the given Unix socket path.
+pub fn listen_unix(path: &String) -> Result<UnixListener> {
+    let listener = UnixListener::bind(path)?;
+    Ok(listener)
+}