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neighbour.h

#ifndef __LINUX_NEIGHBOUR_H
#define __LINUX_NEIGHBOUR_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_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

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