linux/include/linux/neighbour.h
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   1#ifndef __LINUX_NEIGHBOUR_H
   2#define __LINUX_NEIGHBOUR_H
   3
   4#include <linux/types.h>
   5#include <linux/netlink.h>
   6
   7struct ndmsg {
   8        __u8            ndm_family;
   9        __u8            ndm_pad1;
  10        __u16           ndm_pad2;
  11        __s32           ndm_ifindex;
  12        __u16           ndm_state;
  13        __u8            ndm_flags;
  14        __u8            ndm_type;
  15};
  16
  17enum {
  18        NDA_UNSPEC,
  19        NDA_DST,
  20        NDA_LLADDR,
  21        NDA_CACHEINFO,
  22        NDA_PROBES,
  23        __NDA_MAX
  24};
  25
  26#define NDA_MAX (__NDA_MAX - 1)
  27
  28/*
  29 *      Neighbor Cache Entry Flags
  30 */
  31
  32#define NTF_USE         0x01
  33#define NTF_PROXY       0x08    /* == ATF_PUBL */
  34#define NTF_ROUTER      0x80
  35
  36#define NTF_SELF        0x02
  37#define NTF_MASTER      0x04
  38
  39/*
  40 *      Neighbor Cache Entry States.
  41 */
  42
  43#define NUD_INCOMPLETE  0x01
  44#define NUD_REACHABLE   0x02
  45#define NUD_STALE       0x04
  46#define NUD_DELAY       0x08
  47#define NUD_PROBE       0x10
  48#define NUD_FAILED      0x20
  49
  50/* Dummy states */
  51#define NUD_NOARP       0x40
  52#define NUD_PERMANENT   0x80
  53#define NUD_NONE        0x00
  54
  55/* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
  56   and make no address resolution or NUD.
  57   NUD_PERMANENT is also cannot be deleted by garbage collectors.
  58 */
  59
  60struct nda_cacheinfo {
  61        __u32           ndm_confirmed;
  62        __u32           ndm_used;
  63        __u32           ndm_updated;
  64        __u32           ndm_refcnt;
  65};
  66
  67/*****************************************************************
  68 *              Neighbour tables specific messages.
  69 *
  70 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
  71 * NLM_F_DUMP flag set. Every neighbour table configuration is
  72 * spread over multiple messages to avoid running into message
  73 * size limits on systems with many interfaces. The first message
  74 * in the sequence transports all not device specific data such as
  75 * statistics, configuration, and the default parameter set.
  76 * This message is followed by 0..n messages carrying device
  77 * specific parameter sets.
  78 * Although the ordering should be sufficient, NDTA_NAME can be
  79 * used to identify sequences. The initial message can be identified
  80 * by checking for NDTA_CONFIG. The device specific messages do
  81 * not contain this TLV but have NDTPA_IFINDEX set to the
  82 * corresponding interface index.
  83 *
  84 * To change neighbour table attributes, send RTM_SETNEIGHTBL
  85 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
  86 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
  87 * otherwise. Device specific parameter sets can be changed by
  88 * setting NDTPA_IFINDEX to the interface index of the corresponding
  89 * device.
  90 ****/
  91
  92struct ndt_stats {
  93        __u64           ndts_allocs;
  94        __u64           ndts_destroys;
  95        __u64           ndts_hash_grows;
  96        __u64           ndts_res_failed;
  97        __u64           ndts_lookups;
  98        __u64           ndts_hits;
  99        __u64           ndts_rcv_probes_mcast;
 100        __u64           ndts_rcv_probes_ucast;
 101        __u64           ndts_periodic_gc_runs;
 102        __u64           ndts_forced_gc_runs;
 103};
 104
 105enum {
 106        NDTPA_UNSPEC,
 107        NDTPA_IFINDEX,                  /* u32, unchangeable */
 108        NDTPA_REFCNT,                   /* u32, read-only */
 109        NDTPA_REACHABLE_TIME,           /* u64, read-only, msecs */
 110        NDTPA_BASE_REACHABLE_TIME,      /* u64, msecs */
 111        NDTPA_RETRANS_TIME,             /* u64, msecs */
 112        NDTPA_GC_STALETIME,             /* u64, msecs */
 113        NDTPA_DELAY_PROBE_TIME,         /* u64, msecs */
 114        NDTPA_QUEUE_LEN,                /* u32 */
 115        NDTPA_APP_PROBES,               /* u32 */
 116        NDTPA_UCAST_PROBES,             /* u32 */
 117        NDTPA_MCAST_PROBES,             /* u32 */
 118        NDTPA_ANYCAST_DELAY,            /* u64, msecs */
 119        NDTPA_PROXY_DELAY,              /* u64, msecs */
 120        NDTPA_PROXY_QLEN,               /* u32 */
 121        NDTPA_LOCKTIME,                 /* u64, msecs */
 122        NDTPA_QUEUE_LENBYTES,           /* u32 */
 123        __NDTPA_MAX
 124};
 125#define NDTPA_MAX (__NDTPA_MAX - 1)
 126
 127struct ndtmsg {
 128        __u8            ndtm_family;
 129        __u8            ndtm_pad1;
 130        __u16           ndtm_pad2;
 131};
 132
 133struct ndt_config {
 134        __u16           ndtc_key_len;
 135        __u16           ndtc_entry_size;
 136        __u32           ndtc_entries;
 137        __u32           ndtc_last_flush;        /* delta to now in msecs */
 138        __u32           ndtc_last_rand;         /* delta to now in msecs */
 139        __u32           ndtc_hash_rnd;
 140        __u32           ndtc_hash_mask;
 141        __u32           ndtc_hash_chain_gc;
 142        __u32           ndtc_proxy_qlen;
 143};
 144
 145enum {
 146        NDTA_UNSPEC,
 147        NDTA_NAME,                      /* char *, unchangeable */
 148        NDTA_THRESH1,                   /* u32 */
 149        NDTA_THRESH2,                   /* u32 */
 150        NDTA_THRESH3,                   /* u32 */
 151        NDTA_CONFIG,                    /* struct ndt_config, read-only */
 152        NDTA_PARMS,                     /* nested TLV NDTPA_* */
 153        NDTA_STATS,                     /* struct ndt_stats, read-only */
 154        NDTA_GC_INTERVAL,               /* u64, msecs */
 155        __NDTA_MAX
 156};
 157#define NDTA_MAX (__NDTA_MAX - 1)
 158
 159#endif
 160
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