add UdpListener::from_tokio() (#14)

* add UdpListener::from_tokio()

* Add simple docs to UdpListener methods

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Co-authored-by: Sajjad (Sage) Pourali <[email protected]>

Author: asuper0

src/lib.rs

@@ -54,9 +54,14 @@ impl Drop for UdpListener {
 }
 
 impl UdpListener {
+    /// Binds the `UdpListener` to the given local address.
     pub async fn bind(local_addr: SocketAddr) -> io::Result<Self> {
-        let (tx, rx) = mpsc::channel(CHANNEL_LEN);
         let udp_socket = UdpSocket::bind(local_addr).await?;
+        Self::from_tokio(udp_socket).await
+    }
+    /// Creates a `UdpListener` from an existing `tokio::net::UdpSocket`.
+    pub async fn from_tokio(udp_socket: UdpSocket) -> io::Result<Self> {
+        let (tx, rx) = mpsc::channel(CHANNEL_LEN);
         let local_addr = udp_socket.local_addr()?;
 
         let handler = tokio::spawn(async move {