include/linux/neighbour.h

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