#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