"fmt"
	"net"
	"os"
	"path/filepath"

	"istio.io/istio/pkg/log"
)

func NewListener(path string) (net.Listener, error) {
	// Remove unix socket before use.
	if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
		// Anything other than "file not found" is an error.
		return nil, fmt.Errorf("failed to remove unix://%s: %v", path, err)
	}

	// Attempt to create the folder in case it doesn't exist

	return w, listeners, nil
}

func (c *ConfigWriter) retrieveSortedListenerSlice() ([]*listener.Listener, error) {
	if c.configDump == nil {
		return nil, fmt.Errorf("config writer has not been primed")
	}
	listenerDump, err := c.configDump.GetListenerConfigDump()
	if err != nil {
		return nil, fmt.Errorf("listener dump: %v", err)
	}
	listeners := make([]*listener.Listener, 0)

// * controls incoming connections only doing HTTP protocol
func newHTTPListener(ctx context.Context, serverAddrs []string, opts TCPOptions) (listener *httpListener, listenErrs []error) {
	listeners := make([]net.Listener, 0, len(serverAddrs))
	listenErrs = make([]error, len(serverAddrs))

	// Unix listener with special TCP options.
	listenCfg := net.ListenConfig{
		Control: setTCPParametersFn(opts),
	}

)

// ListenerDiff prints a diff between Istiod and Envoy listeners to the passed writer
func (c *Comparator) ListenerDiff() error {
	envoyBytes, istiodBytes := &bytes.Buffer{}, &bytes.Buffer{}
	envoyListenerDump, err := c.envoy.GetDynamicListenerDump(true)
	if err != nil {
		envoyBytes.WriteString(err.Error())
	} else {
		envoy, err := protomarshal.ToJSONWithAnyResolver(envoyListenerDump, "    ", &envoyResolver)
		if err != nil {