type HostPortManager interface {
	// Add implements port mappings.
	// id should be a unique identifier for a pod, e.g. podSandboxID.
	// podPortMapping is the associated port mapping information for the pod.
	// natInterfaceName is the interface that localhost used to talk to the given pod.
	Add(id string, podPortMapping *PodPortMapping, natInterfaceName string) error
	// Remove cleans up matching port mappings
	// Remove must be able to clean up port mappings without pod IP
	Remove(id string, podPortMapping *PodPortMapping) error
}

type HostportSyncer interface {
	// SyncHostports gathers all hostports on node and setup iptables rules to enable them.
	// On each invocation existing ports are synced and stale rules are deleted.
	SyncHostports(natInterfaceName string, activePodPortMappings []*PodPortMapping) error
	// OpenPodHostportsAndSync opens hostports for a new PodPortMapping, gathers all hostports on
	// node, sets up iptables rules enable them. On each invocation existing ports are synced and stale rules are deleted.
	// 'newPortMapping' must also be present in 'activePodPortMappings'.
	OpenPodHostportsAndSync(newPortMapping *PodPortMapping, natInterfaceName string, activePodPortMappings []*PodPortMapping) error
}

type PodPortMapping struct {
	Namespace    string
	Name         string
	PortMappings []*PortMapping
	HostNetwork  bool
	IP           net.IP
}

type PortMapping struct {
	Name          string
	HostPort      int32
	ContainerPort int32
	Protocol      v1.Protocol
	HostIP        string
}