datapath

type Datapath interface {
	// Node must return the handler for node events
	Node() NodeHandler

	// LocalNodeAddressing must return the node addressing implementation
	// of the local node
	LocalNodeAddressing() NodeAddressing

	// WriteNodeConfig writes the implementation-specific configuration of
	// node-wide options into the specified writer.
	WriteNodeConfig(io.Writer, *LocalNodeConfiguration) error

	// WriteNetdevConfig writes the implementation-specific configuration
	// of configurable options to the specified writer. Options specified
	// here will apply to base programs and not to endpoints, though
	// endpoints may have equivalent configurable options.
	WriteNetdevConfig(io.Writer, DeviceConfiguration) error

	// WriteTemplateConfig writes the implementation-specific configuration
	// of configurable options for BPF templates to the specified writer.
	WriteTemplateConfig(w io.Writer, cfg EndpointConfiguration) error

	// WriteEndpointConfig writes the implementation-specific configuration
	// of configurable options for the endpoint to the specified writer.
	WriteEndpointConfig(w io.Writer, cfg EndpointConfiguration) error

	// InstallProxyRules creates the necessary datapath config (e.g., iptables
	// rules for redirecting host proxy traffic on a specific ProxyPort)
	InstallProxyRules(proxyPort uint16, ingress bool, name string) error

	// RemoveProxyRules creates the necessary datapath config (e.g., iptables
	// rules for redirecting host proxy traffic on a specific ProxyPort)
	RemoveProxyRules(proxyPort uint16, ingress bool, name string) error
}

type DeviceConfiguration interface {
	// GetCIDRPrefixLengths fetches the lists of unique IPv6 and IPv4
	// prefix lengths used for datapath lookups, each of which is sorted
	// from longest prefix to shortest prefix. It must return more than
	// one element in each returned array.
	GetCIDRPrefixLengths() (s6, s4 []