Go で Unix ソケットを使用して双方向通信を実現するにはどうすればよいですか?

// Client code with a reader goroutine
package main

import (
    "io"
    "log"
    "net"
    "time"
)

func reader(r io.Reader) {
    buf := make([]byte, 1024)
    for {
        n, err := r.Read(buf[:])
        if err != nil {
            return
        }
        println("Client got:", string(buf[0:n]))
    }
}

func main() {
    c, err := net.Dial("unix", "/tmp/echo.sock")
    if err != nil {
        panic(err)
    }
    defer c.Close()

    go reader(c)
    for {
        _, err := c.Write([]byte("hi"))
        if err != nil {
            log.Fatal("write error:", err)
            break
        }
        time.Sleep(1e9)
    }
}

// Server code with error handling and connection closing
package main

import (
    "log"
    "net"
)

func echoServer(c net.Conn) {
    defer c.Close()  // Ensure connection is closed when the goroutine exits

    for {
        buf := make([]byte, 512)
        nr, err := c.Read(buf)
        if err != nil {
            log.Fatal("read error:", err)
        }

        data := buf[0:nr]
        _, err = c.Write(data)
        if err != nil {
            log.Fatal("write error:", err)
        }
    }
}

func main() {
    l, err := net.Listen("unix", "/tmp/echo.sock")
    if err != nil {
        log.Fatal("listen error:", err)
    }

    for {
        fd, err := l.Accept()
        if err != nil {
            log.Fatal("accept error:", err)
        }

        go echoServer(fd)
    }
}