// New creates and returns a new TUN interface for the application.
func New(name string, opts ...Option) (*TUN, error) {
    // Setup TUN Config
    cfg := water.Config{
        DeviceType: water.TUN,
    }
    cfg.Name = name

    // Create Water Interface
    iface, err := water.New(cfg)
    if err != nil {
        return nil, err
    }
    ...
}