我有一個簡單的 TCP 服務器，當客戶端連接時，我想獲取用于連接的域地址：package mainimport (    "fmt"    "net"    "os")const (    CONN_HOST = "localhost"    CONN_PORT = "3333"    CONN_TYPE = "tcp")func main() {    // Listen for incoming connections.    l, err := net.Listen(CONN_TYPE, CONN_HOST+":"+CONN_PORT)    if err != nil {        fmt.Println("Error listening:", err.Error())        os.Exit(1)    }    // Close the listener when the application closes.    defer l.Close()    fmt.Println("Listening on " + CONN_HOST + ":" + CONN_PORT)    for {        // Listen for an incoming connection.        conn, err := l.Accept()        if err != nil {            fmt.Println("Error accepting: ", err.Error())            os.Exit(1)        }        // Handle connections in a new goroutine.        go handleRequest(conn)    }}// Handles incoming requests.func handleRequest(conn net.Conn) {    // Make a buffer to hold incoming data.    buf := make([]byte, 1024)    // Read the incoming connection into the buffer.    _, err := conn.Read(buf)    if err != nil {        fmt.Println("Error reading:", err.Error())    }    // Send a response back to person contacting us.    conn.Write([]byte("Message received."))    // Close the connection when you're done with it.    conn.Close()}我嘗試調試conn net.Conn參數，但找不到對域地址的任何引用。嘗試使用http://test.127.0.0.1.xip.io:3333/并且我有興趣以test.127.0.0.1.xip.io某種方式獲得。有任何想法嗎？