#ifndef __LINUX_NEIGHBOUR_H
#define __LINUX_NEIGHBOUR_H

#include <linux/types.h>
#include <linux/netlink.h>

struct ndmsg
{
        __u8                ndm_family;
        __u8                ndm_pad1;
        __u16                ndm_pad2;
        __s32                ndm_ifindex;
        __u16                ndm_state;
        __u8                ndm_flags;
        __u8                ndm_type;
};

enum
{
        NDA_UNSPEC,
        NDA_DST,
        NDA_LLADDR,
        NDA_CACHEINFO,
        NDA_PROBES,
        __NDA_MAX
};

#define NDA_MAX (__NDA_MAX - 1)

/*
 *        Neighbor Cache Entry Flags
 */

#define NTF_USE                0x01
#define NTF_PROXY        0x08        /* == ATF_PUBL */
#define NTF_ROUTER        0x80

/*
 *        Neighbor Cache Entry States.
 */

#define NUD_INCOMPLETE        0x01
#define NUD_REACHABLE        0x02
#define NUD_STALE        0x04
#define NUD_DELAY        0x08
#define NUD_PROBE        0x10
#define NUD_FAILED        0x20

/* Dummy states */
#define NUD_NOARP        0x40
#define NUD_PERMANENT        0x80
#define NUD_NONE        0x00

/* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
   and make no address resolution or NUD.
   NUD_PERMANENT is also cannot be deleted by garbage collectors.
 */

struct nda_cacheinfo
{
        __u32                ndm_confirmed;
        __u32                ndm_used;
        __u32                ndm_updated;
        __u32                ndm_refcnt;
};

/*****************************************************************
 *                Neighbour tables specific messages.
 *
 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
 * NLM_F_DUMP flag set. Every neighbour table configuration is
 * spread over multiple messages to avoid running into message
 * size limits on systems with many interfaces. The first message
 * in the sequence transports all not device specific data such as
 * statistics, configuration, and the default parameter set.
 * This message is followed by 0..n messages carrying device
 * specific parameter sets.
 * Although the ordering should be sufficient, NDTA_NAME can be
 * used to identify sequences. The initial message can be identified
 * by checking for NDTA_CONFIG. The device specific messages do
 * not contain this TLV but have NDTPA_IFINDEX set to the
 * corresponding interface index.
 *
 * To change neighbour table attributes, send RTM_SETNEIGHTBL
 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
 * otherwise. Device specific parameter sets can be changed by
 * setting NDTPA_IFINDEX to the interface index of the corresponding
 * device.
 ****/

struct ndt_stats
{
        __u64                ndts_allocs;
        __u64                ndts_destroys;
        __u64                ndts_hash_grows;
        __u64                ndts_res_failed;
        __u64                ndts_lookups;
        __u64                ndts_hits;
        __u64                ndts_rcv_probes_mcast;
        __u64                ndts_rcv_probes_ucast;
        __u64                ndts_periodic_gc_runs;
        __u64                ndts_forced_gc_runs;
};

enum {
        NDTPA_UNSPEC,
        NDTPA_IFINDEX,                        /* u32, unchangeable */
        NDTPA_REFCNT,                        /* u32, read-only */
        NDTPA_REACHABLE_TIME,                /* u64, read-only, msecs */
        NDTPA_BASE_REACHABLE_TIME,        /* u64, msecs */
        NDTPA_RETRANS_TIME,                /* u64, msecs */
        NDTPA_GC_STALETIME,                /* u64, msecs */
        NDTPA_DELAY_PROBE_TIME,                /* u64, msecs */
        NDTPA_QUEUE_LEN,                /* u32 */
        NDTPA_APP_PROBES,                /* u32 */
        NDTPA_UCAST_PROBES,                /* u32 */
        NDTPA_MCAST_PROBES,                /* u32 */
        NDTPA_ANYCAST_DELAY,                /* u64, msecs */
        NDTPA_PROXY_DELAY,                /* u64, msecs */
        NDTPA_PROXY_QLEN,                /* u32 */
        NDTPA_LOCKTIME,                        /* u64, msecs */
        __NDTPA_MAX
};
#define NDTPA_MAX (__NDTPA_MAX - 1)

struct ndtmsg
{
        __u8                ndtm_family;
        __u8                ndtm_pad1;
        __u16                ndtm_pad2;
};

struct ndt_config
{
        __u16                ndtc_key_len;
        __u16                ndtc_entry_size;
        __u32                ndtc_entries;
        __u32                ndtc_last_flush;        /* delta to now in msecs */
        __u32                ndtc_last_rand;                /* delta to now in msecs */
        __u32                ndtc_hash_rnd;
        __u32                ndtc_hash_mask;
        __u32                ndtc_hash_chain_gc;
        __u32                ndtc_proxy_qlen;
};

enum {
        NDTA_UNSPEC,
        NDTA_NAME,                        /* char *, unchangeable */
        NDTA_THRESH1,                        /* u32 */
        NDTA_THRESH2,                        /* u32 */
        NDTA_THRESH3,                        /* u32 */
        NDTA_CONFIG,                        /* struct ndt_config, read-only */
        NDTA_PARMS,                        /* nested TLV NDTPA_* */
        NDTA_STATS,                        /* struct ndt_stats, read-only */
        NDTA_GC_INTERVAL,                /* u64, msecs */
        __NDTA_MAX
};
#define NDTA_MAX (__NDTA_MAX - 1)

#endif