include/linux/neighbour.h

   1 #ifndef __LINUX_NEIGHBOUR_H
   2 #define __LINUX_NEIGHBOUR_H
   3
   4 #include <linux/types.h>
   5 #include <linux/netlink.h>
   6
   7 struct 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
  17 enum {
  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
  60 struct 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
  92 struct 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
 105 enum {
 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
 127 struct ndtmsg {
 128         __u8            ndtm_family;
 129         __u8            ndtm_pad1;
 130         __u16           ndtm_pad2;
 131 };
 132
 133 struct 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
 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