/**
 * Route routing tables.
 * @category Constants
 */
export declare enum RouteRoutingTables {
    /**
     * The `local` table is a special routing table containing high priority control routes for local
     * and broadcast addresses.
     */
    Local = "local",
    /** The `main` table is the normal routing table containing all non-policy routes.  */
    Main = "main",
    /**
     * The `default` table is empty.
     * It is reserved for some post-processing if no previous default rules selected the packet.
     */
    Default = "default",
    All = "all",
    Cache = "cache"
}
/**
 * Routing table protocols.
 * @category Constants
 */
export declare enum RoutingTableProtocols {
    /** The route was installed by the kernel during autoconfiguration. */
    Kernel = "kernel",
    /**
     * The route was installed during the bootup sequence.
     * If a routing daemon starts, it will purge all of them.
     */
    Boot = "boot",
    /**
     * The route was installed by the administrator to override dynamic routing.
     * Routing daemon will respect them and, probably, even advertise them to its peers.
     */
    Static = "static",
    /** The route was installed due to an ICMP redirect. */
    Redirect = "redirect",
    /** The route was installed by Router Discovery protocol. */
    Ra = "ra"
}
/**
 * Route types.
 * @category Constants
 */
export declare enum RouteTypes {
    /** The route entry describes real paths to the destinations covered by the route prefix. */
    Unicast = "unicast",
    /**
     * Not implemented the destinations are anycast addresses assigned to this host.
     * They are mainly equivalent to local with one difference: such addresses are invalid
     * when used as the source address of any packet.
     */
    Anycast = "anycast",
    /**
     * The destinations are assigned to this host.
     * The packets are looped back and delivered locally.
     */
    Local = "local",
    /**
     * The destinations are broadcast addresses.
     * The packets are sent as link broadcasts.
     */
    Broadcast = "broadcast",
    /**
     * A special type used for multicast routing.
     * It is not present in normal routing tables.
     */
    Multicast = "multicast",
    /**
     * A special control route used together with policy rules.
     * If such a route is selected, lookup in this table is terminated pretending that no route was found.
     * Without policy routing it is equivalent to the absence of the route in the routing table.
     * The packets are dropped and the ICMP message net unreachable is generated.
     * The local senders get an ENETUNREACH error.
     */
    Throw = "throw",
    /**
     * These destinations are unreachable.
     * Packets are discarded and the ICMP message host unreachable is generated.
     * The local senders get an EHOSTUNREACH error.
     */
    Unreachable = "unreachable",
    /**
     * These destinations are unreachable.
     * Packets are discarded and the ICMP message communication administratively prohibited is generated.
     * The local senders get an EACCES error.
     */
    Prohibit = "prohibit",
    /**
     * These destinations are unreachable.
     * Packets are discarded silently.
     * The local senders get an EINVAL error.
     */
    Blackhole = "blackhole",
    /**
     * A special NAT route.
     * Destinations covered by the prefix are considered to be dummy (or external) addresses which require translation
     * to real (or internal) ones before forwarding.
     * The addresses to translate to are selected with the attribute via.
     * Warning: Route NAT is no longer supported in Linux 2.6.
     */
    Nat = "nat"
}