creating AddrIncoming from an existed TcpListener

src/server/tcp.rs

@@ -51,6 +51,19 @@ impl AddrIncoming {
     pub fn bind(addr: &SocketAddr) -> crate::Result<Self> {
         AddrIncoming::new(addr)
     }
+
+    /// Creates a new `AddrIncoming` from an existed `TcpListener`
+    pub fn from_listener(listener: TcpListener) -> crate::Result<Self> {
+        let addr = listener.local_addr().map_err(crate::Error::new_listen)?;
+        Ok(AddrIncoming {
+            listener,
+            addr,
+            sleep_on_errors: true,
+            tcp_keepalive_timeout: None,
+            tcp_nodelay: false,
+            timeout: None,
+        })
+    }
 
     /// Get the local address bound to this listener.
     pub fn local_addr(&self) -> SocketAddr {