proxy

type BaseEndpointInfo struct {
	Endpoint string // TODO: should be an endpointString type
	// IsLocal indicates whether the endpoint is running in same host as kube-proxy.
	IsLocal  bool
	Topology map[string]string

	// ZoneHints represent the zone hints for the endpoint. This is based on
	// endpoint.hints.forZones[*].name in the EndpointSlice API.
	ZoneHints sets.String
	// Ready indicates whether this endpoint is ready and NOT terminating.
	// For pods, this is true if a pod has a ready status and a nil deletion timestamp.
	// This is only set when watching EndpointSlices. If using Endpoints, this is always
	// true since only ready endpoints are read from Endpoints.
	// TODO: Ready can be inferred from Serving and Terminating below when enabled by default.
	Ready bool
	// Serving indiciates whether this endpoint is ready regardless of its terminating state.
	// For pods this is true if it has a ready status regardless of its deletion timestamp.
	// This is only set when watching EndpointSlices. If using Endpoints, this is always
	// true since only ready endpoints are read from Endpoints.
	Serving bool
	// Terminating indicates whether this endpoint is terminating.
	// For pods this is true if it has a non-nil deletion timestamp.
	// This is only set when watching EndpointSlices. If using Endpoints, this is always
	// false since terminating endpoints are always excluded from Endpoints.
	Terminating bool
}

type BaseServiceInfo struct {
	// contains filtered or unexported fields
}

type Endpoint interface {
	// String returns endpoint string.  An example format can be: `IP:Port`.
	// We take the returned value as ServiceEndpoint.Endpoint.
	String() string
	// GetIsLocal returns true if the endpoint is running in same host as kube-proxy, otherwise returns false.
	GetIsLocal() bool
	// IsReady returns true if an endpoint is ready and not terminating.
	// This is only set when watching EndpointSlices. If using Endpoints, this is always
	// true since only ready endpoints are read from Endpoints.
	IsReady() bool
	// IsServing returns true if an endpoint is ready. It does not account
	// for terminating state.
	// This is only set when watching EndpointSlices. If using Endpoints, this is always
	// true since only ready endpoints are read from Endpoints.
	IsServing() bool
	// IsTerminating retruns true if an endpoint is terminating. For pods,
	// that is any pod with a deletion timestamp.
	// This is only set when watching EndpointSlices. If using Endpoints, this is always
	// false since terminating endpoints are always excluded from Endpoints.
	IsTerminating() bool
	// GetTopology returns the topology information of the endpoint.
	GetTopology() map[string]string
	// GetZoneHint returns the zone hint for the endpoint. This is based on
	// endpoint.hints.forZones[0].name in the EndpointSlice API.
	GetZoneHints() sets.String
	// IP returns IP part of the endpoint.
	IP() string
	// Port returns the Port part of the endpoint.
	Port() (int, error)
	// Equal checks if two endpoints are equal.
	Equal(Endpoint) bool
}

type EndpointChangeTracker struct {
	// contains filtered or unexported fields
}

type EndpointSliceCache struct {
	// contains filtered or unexported fields
}

type EndpointsMap map[ServicePortName][]Endpoint

type Provider interface {
	config.EndpointsHandler
	config.EndpointSliceHandler
	config.ServiceHandler
	config.NodeHandler

	// Sync immediately synchronizes the Provider's current state to proxy rules.
	Sync()
	// SyncLoop runs periodic work.
	// This is expected to run as a goroutine or as the main loop of the app.
	// It does not return.
	SyncLoop()
}

type ServiceChangeTracker struct {
	// contains filtered or unexported fields
}

type ServiceEndpoint struct {
	Endpoint        string
	ServicePortName ServicePortName
}

type ServiceMap map[ServicePortName]ServicePort

type ServicePort interface {
	// String returns service string.  An example format can be: `IP:Port/Protocol`.
	String() string
	// GetClusterIP returns service cluster IP in net.IP format.
	ClusterIP() net.IP
	// GetPort returns service port if present. If return 0 means not present.
	Port() int
	// GetSessionAffinityType returns service session affinity type
	SessionAffinityType() v1.ServiceAffinity
	// GetStickyMaxAgeSeconds returns service max connection age
	StickyMaxAgeSeconds() int
	// ExternalIPStrings returns service ExternalIPs as a string array.
	ExternalIPStrings() []string
	// LoadBalancerIPStrings returns service LoadBalancerIPs as a string array.
	LoadBalancerIPStrings() []string
	// GetProtocol returns service protocol.
	Protocol() v1.Protocol
	// LoadBalancerSourceRanges returns service LoadBalancerSourceRanges if present empty array if not
	LoadBalancerSourceRanges() []string
	// GetHealthCheckNodePort returns service health check node port if present.  If return 0, it means not present.
	HealthCheckNodePort() int
	// GetNodePort returns a service Node port if present. If return 0, it means not present.
	NodePort() int
	// NodeLocalExternal returns if a service has only node local endpoints for external traffic.
	NodeLocalExternal() bool
	// NodeLocalInternal returns if a service has only node local endpoints for internal traffic.
	NodeLocalInternal() bool
	// InternalTrafficPolicy returns service InternalTrafficPolicy
	InternalTrafficPolicy() *v1.ServiceInternalTrafficPolicyType
	// TopologyKeys returns service TopologyKeys as a string array.
	TopologyKeys() []string
	// HintsAnnotation returns the value of the v1.AnnotationTopologyAwareHints annotation.
	HintsAnnotation() string
}

type ServicePortName struct {
	types.NamespacedName
	Port     string
	Protocol v1.Protocol
}

type UpdateEndpointMapResult struct {
	// HCEndpointsLocalIPSize maps an endpoints name to the length of its local IPs.
	HCEndpointsLocalIPSize map[types.NamespacedName]int
	// StaleEndpoints identifies if an endpoints service pair is stale.
	StaleEndpoints []ServiceEndpoint
	// StaleServiceNames identifies if a service is stale.
	StaleServiceNames []ServicePortName
	// List of the trigger times for all endpoints objects that changed. It's used to export the
	// network programming latency.
	// NOTE(oxddr): this can be simplified to []time.Time if memory consumption becomes an issue.
	LastChangeTriggerTimes map[types.NamespacedName][]time.Time
}

type UpdateServiceMapResult struct {
	// HCServiceNodePorts is a map of Service names to node port numbers which indicate the health of that Service on this Node.
	// The value(uint16) of HCServices map is the service health check node port.
	HCServiceNodePorts map[types.NamespacedName]uint16
	// UDPStaleClusterIP holds stale (no longer assigned to a Service) Service IPs that had UDP ports.
	// Callers can use this to abort timeout-waits or clear connection-tracking information.
	UDPStaleClusterIP sets.String
}