net

func CheckPortAvailable(host string, port int) bool

func Dial(network, addr string) (net.Conn, error)

func DialContext(ctx context.Context, network, addr string) (net.Conn, error)

func DialRetry(ctx context.Context, network, addr string, maxRetry uint, checkInterval time.Duration) (conn net.Conn, err error)

func DialTimeout(network, addr string, timeout, checkInterval time.Duration) (net.Conn, error)

func FindFreePort(host string, startPort int) (int, error)

func ReservePort(host string, port int) (listener net.Listener, err error)