apiVersion: v1
kind: Service
metadata:
  name: hello
spec:
  ports:
    - appProtocol: http
      port: 9080`
	validPortNamingSvcWithAppProtocol2 = `
apiVersion: v1
kind: Service
metadata:
  name: hello
spec:
  ports:
    - appProtocol: http
      name: fake # should not have error since the appProtocol field
      port: 9080`
	inValidPortNamingSvcWithAppProtocol = `
apiVersion: v1

    kind: Gateway
    name: {{.Name}}
    uid: {{.UID}}
spec:
  ports:
  {{- range $key, $val := .Ports }}
  - name: {{ $val.Name | quote }}
    port: {{ $val.Port }}
    protocol: TCP
    appProtocol: {{ $val.AppProtocol }}
  {{- end }}
  selector:
    "{{.GatewayNameLabel}}": {{.Name}}
  {{- if and (.Spec.Addresses) (eq .ServiceType "LoadBalancer") }}
  loadBalancerIP: {{ (index .Spec.Addresses 0).Value | quote}}

    name: "{{.Name}}"
    uid: "{{.UID}}"
spec:
  ports:
  {{- range $key, $val := .Ports }}
  - name: {{ $val.Name | quote }}
    port: {{ $val.Port }}
    protocol: TCP
    appProtocol: {{ $val.AppProtocol }}
  {{- end }}
  selector:
    "{{.GatewayNameLabel}}": "{{.Name}}"
  {{- if and (.Spec.Addresses) (eq .ServiceType "LoadBalancer") }}
  loadBalancerIP: {{ (index .Spec.Addresses 0).Value | quote}}

  // port represents the port number of the endpoint.
  // If this is not specified, ports are not restricted and must be
  // interpreted in the context of the specific consumer.
  optional int32 port = 3;

  // appProtocol represents the application protocol for this port.
  // This field follows standard Kubernetes label syntax.
  // Un-prefixed names are reserved for IANA standard service names (as per

  //
  // * Other protocols should use implementation-defined prefixed names such as
  // mycompany.com/my-custom-protocol.
  // +optional
  optional string appProtocol = 4;
}

// EndpointSlice represents a subset of the endpoints that implement a service.
// For a given service there may be multiple EndpointSlice objects, selected by

		for _, port := range ports {
			p := port.(map[string]any)
			if p["protocol"] != nil && strings.EqualFold(p["protocol"].(string), serviceProtocolUDP) {
				continue
			}
			if ap := p["appProtocol"]; ap != nil {
				if protocol.Parse(ap.(string)).IsUnsupported() {
					errs = multierror.Append(errs, fmt.Errorf("service %q doesn't follow Istio protocol selection. "+

	}
}

func findProtocolForPort(port *corev1.ServicePort) string {
	var protocol string
	if port.Name == "" && port.AppProtocol == nil && port.Protocol != corev1.ProtocolUDP {
		protocol = "auto-detect"
	} else {
		protocol = string(configKube.ConvertProtocol(port.Port, port.Name, port.Protocol, port.AppProtocol))
	}
	return protocol
}

func isMeshed(pod *corev1.Pod) bool {
	return inject.FindSidecar(pod) != nil
}

		},
		{
			port: corev1.ServicePort{
				Name:     "GRPC-port",
				Protocol: corev1.ProtocolTCP,
			},
			expectedProtocol: "GRPC",
		},
		{
			port: corev1.ServicePort{
				AppProtocol: &http,
				Protocol:    corev1.ProtocolTCP,
			},
			expectedProtocol: "HTTP",
		},
		{
			port: corev1.ServicePort{
				Protocol: corev1.ProtocolTCP,
				Port:     80,
			},

- Remove `kubernetes.io/grpc` standard appProtocol ([#116866](https://github.com/kubernetes/kubernetes/pull/116866), [@LiorLieberman](https://github.com/LiorLieberman)) [SIG API Machinery and Apps]

  //
  // * Other protocols should use implementation-defined prefixed names such as
  // mycompany.com/my-custom-protocol.
  // +optional
  optional string appProtocol = 4;
}

// EndpointSubset is a group of addresses with a common set of ports. The
// expanded set of endpoints is the Cartesian product of Addresses x Ports.
// For example, given:
//
// 	{