include/uapi/linux/neighbour.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef __LINUX_NEIGHBOUR_H
   3 #define __LINUX_NEIGHBOUR_H
   4
   5 #include <linux/types.h>
   6 #include <linux/netlink.h>
   7
   8 struct ndmsg {
   9         __u8            ndm_family;
  10         __u8            ndm_pad1;
  11         __u16           ndm_pad2;
  12         __s32           ndm_ifindex;
  13         __u16           ndm_state;
  14         __u8            ndm_flags;
  15         __u8            ndm_type;
  16 };
  17
  18 enum {
  19         NDA_UNSPEC,
  20         NDA_DST,
  21         NDA_LLADDR,
  22         NDA_CACHEINFO,
  23         NDA_PROBES,
  24         NDA_VLAN,
  25         NDA_PORT,
  26         NDA_VNI,
  27         NDA_IFINDEX,
  28         NDA_MASTER,
  29         NDA_LINK_NETNSID,
  30         NDA_SRC_VNI,
  31         __NDA_MAX
  32 };
  33
  34 #define NDA_MAX (__NDA_MAX - 1)
  35
  36 /*
  37  *      Neighbor Cache Entry Flags
  38  */
  39
  40 #define NTF_USE         0x01
  41 #define NTF_SELF        0x02
  42 #define NTF_MASTER      0x04
  43 #define NTF_PROXY       0x08    /* == ATF_PUBL */
  44 #define NTF_EXT_LEARNED 0x10
  45 #define NTF_OFFLOADED   0x20
  46 #define NTF_STICKY      0x40
  47 #define NTF_ROUTER      0x80
  48
  49 /*
  50  *      Neighbor Cache Entry States.
  51  */
  52
  53 #define NUD_INCOMPLETE  0x01
  54 #define NUD_REACHABLE   0x02
  55 #define NUD_STALE       0x04
  56 #define NUD_DELAY       0x08
  57 #define NUD_PROBE       0x10
  58 #define NUD_FAILED      0x20
  59
  60 /* Dummy states */
  61 #define NUD_NOARP       0x40
  62 #define NUD_PERMANENT   0x80
  63 #define NUD_NONE        0x00
  64
  65 /* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
  66    and make no address resolution or NUD.
  67    NUD_PERMANENT also cannot be deleted by garbage collectors.
  68  */
  69
  70 struct nda_cacheinfo {
  71         __u32           ndm_confirmed;
  72         __u32           ndm_used;
  73         __u32           ndm_updated;
  74         __u32           ndm_refcnt;
  75 };
  76
  77 /*****************************************************************
  78  *              Neighbour tables specific messages.
  79  *
  80  * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
  81  * NLM_F_DUMP flag set. Every neighbour table configuration is
  82  * spread over multiple messages to avoid running into message
  83  * size limits on systems with many interfaces. The first message
  84  * in the sequence transports all not device specific data such as
  85  * statistics, configuration, and the default parameter set.
  86  * This message is followed by 0..n messages carrying device
  87  * specific parameter sets.
  88  * Although the ordering should be sufficient, NDTA_NAME can be
  89  * used to identify sequences. The initial message can be identified
  90  * by checking for NDTA_CONFIG. The device specific messages do
  91  * not contain this TLV but have NDTPA_IFINDEX set to the
  92  * corresponding interface index.
  93  *
  94  * To change neighbour table attributes, send RTM_SETNEIGHTBL
  95  * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
  96  * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
  97  * otherwise. Device specific parameter sets can be changed by
  98  * setting NDTPA_IFINDEX to the interface index of the corresponding
  99  * device.
 100  ****/
 101
 102 struct ndt_stats {
 103         __u64           ndts_allocs;
 104         __u64           ndts_destroys;
 105         __u64           ndts_hash_grows;
 106         __u64           ndts_res_failed;
 107         __u64           ndts_lookups;
 108         __u64           ndts_hits;
 109         __u64           ndts_rcv_probes_mcast;
 110         __u64           ndts_rcv_probes_ucast;
 111         __u64           ndts_periodic_gc_runs;
 112         __u64           ndts_forced_gc_runs;
 113         __u64           ndts_table_fulls;
 114 };
 115
 116 enum {
 117         NDTPA_UNSPEC,
 118         NDTPA_IFINDEX,                  /* u32, unchangeable */
 119         NDTPA_REFCNT,                   /* u32, read-only */
 120         NDTPA_REACHABLE_TIME,           /* u64, read-only, msecs */
 121         NDTPA_BASE_REACHABLE_TIME,      /* u64, msecs */
 122         NDTPA_RETRANS_TIME,             /* u64, msecs */
 123         NDTPA_GC_STALETIME,             /* u64, msecs */
 124         NDTPA_DELAY_PROBE_TIME,         /* u64, msecs */
 125         NDTPA_QUEUE_LEN,                /* u32 */
 126         NDTPA_APP_PROBES,               /* u32 */
 127         NDTPA_UCAST_PROBES,             /* u32 */
 128         NDTPA_MCAST_PROBES,             /* u32 */
 129         NDTPA_ANYCAST_DELAY,            /* u64, msecs */
 130         NDTPA_PROXY_DELAY,              /* u64, msecs */
 131         NDTPA_PROXY_QLEN,               /* u32 */
 132         NDTPA_LOCKTIME,                 /* u64, msecs */
 133         NDTPA_QUEUE_LENBYTES,           /* u32 */
 134         NDTPA_MCAST_REPROBES,           /* u32 */
 135         NDTPA_PAD,
 136         __NDTPA_MAX
 137 };
 138 #define NDTPA_MAX (__NDTPA_MAX - 1)
 139
 140 struct ndtmsg {
 141         __u8            ndtm_family;
 142         __u8            ndtm_pad1;
 143         __u16           ndtm_pad2;
 144 };
 145
 146 struct ndt_config {
 147         __u16           ndtc_key_len;
 148         __u16           ndtc_entry_size;
 149         __u32           ndtc_entries;
 150         __u32           ndtc_last_flush;        /* delta to now in msecs */
 151         __u32           ndtc_last_rand;         /* delta to now in msecs */
 152         __u32           ndtc_hash_rnd;
 153         __u32           ndtc_hash_mask;
 154         __u32           ndtc_hash_chain_gc;
 155         __u32           ndtc_proxy_qlen;
 156 };
 157
 158 enum {
 159         NDTA_UNSPEC,
 160         NDTA_NAME,                      /* char *, unchangeable */
 161         NDTA_THRESH1,                   /* u32 */
 162         NDTA_THRESH2,                   /* u32 */
 163         NDTA_THRESH3,                   /* u32 */
 164         NDTA_CONFIG,                    /* struct ndt_config, read-only */
 165         NDTA_PARMS,                     /* nested TLV NDTPA_* */
 166         NDTA_STATS,                     /* struct ndt_stats, read-only */
 167         NDTA_GC_INTERVAL,               /* u64, msecs */
 168         NDTA_PAD,
 169         __NDTA_MAX
 170 };
 171 #define NDTA_MAX (__NDTA_MAX - 1)
 172
 173 #endif