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_PROTOCOL,  /* Originator of entry */
  32         NDA_NH_ID,
  33         NDA_FDB_EXT_ATTRS,
  34         __NDA_MAX
  35 };
  36
  37 #define NDA_MAX (__NDA_MAX - 1)
  38
  39 /*
  40  *      Neighbor Cache Entry Flags
  41  */
  42
  43 #define NTF_USE         0x01
  44 #define NTF_SELF        0x02
  45 #define NTF_MASTER      0x04
  46 #define NTF_PROXY       0x08    /* == ATF_PUBL */
  47 #define NTF_EXT_LEARNED 0x10
  48 #define NTF_OFFLOADED   0x20
  49 #define NTF_STICKY      0x40
  50 #define NTF_ROUTER      0x80
  51
  52 /*
  53  *      Neighbor Cache Entry States.
  54  */
  55
  56 #define NUD_INCOMPLETE  0x01
  57 #define NUD_REACHABLE   0x02
  58 #define NUD_STALE       0x04
  59 #define NUD_DELAY       0x08
  60 #define NUD_PROBE       0x10
  61 #define NUD_FAILED      0x20
  62
  63 /* Dummy states */
  64 #define NUD_NOARP       0x40
  65 #define NUD_PERMANENT   0x80
  66 #define NUD_NONE        0x00
  67
  68 /* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
  69    and make no address resolution or NUD.
  70    NUD_PERMANENT also cannot be deleted by garbage collectors.
  71  */
  72
  73 struct nda_cacheinfo {
  74         __u32           ndm_confirmed;
  75         __u32           ndm_used;
  76         __u32           ndm_updated;
  77         __u32           ndm_refcnt;
  78 };
  79
  80 /*****************************************************************
  81  *              Neighbour tables specific messages.
  82  *
  83  * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
  84  * NLM_F_DUMP flag set. Every neighbour table configuration is
  85  * spread over multiple messages to avoid running into message
  86  * size limits on systems with many interfaces. The first message
  87  * in the sequence transports all not device specific data such as
  88  * statistics, configuration, and the default parameter set.
  89  * This message is followed by 0..n messages carrying device
  90  * specific parameter sets.
  91  * Although the ordering should be sufficient, NDTA_NAME can be
  92  * used to identify sequences. The initial message can be identified
  93  * by checking for NDTA_CONFIG. The device specific messages do
  94  * not contain this TLV but have NDTPA_IFINDEX set to the
  95  * corresponding interface index.
  96  *
  97  * To change neighbour table attributes, send RTM_SETNEIGHTBL
  98  * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
  99  * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
 100  * otherwise. Device specific parameter sets can be changed by
 101  * setting NDTPA_IFINDEX to the interface index of the corresponding
 102  * device.
 103  ****/
 104
 105 struct ndt_stats {
 106         __u64           ndts_allocs;
 107         __u64           ndts_destroys;
 108         __u64           ndts_hash_grows;
 109         __u64           ndts_res_failed;
 110         __u64           ndts_lookups;
 111         __u64           ndts_hits;
 112         __u64           ndts_rcv_probes_mcast;
 113         __u64           ndts_rcv_probes_ucast;
 114         __u64           ndts_periodic_gc_runs;
 115         __u64           ndts_forced_gc_runs;
 116         __u64           ndts_table_fulls;
 117 };
 118
 119 enum {
 120         NDTPA_UNSPEC,
 121         NDTPA_IFINDEX,                  /* u32, unchangeable */
 122         NDTPA_REFCNT,                   /* u32, read-only */
 123         NDTPA_REACHABLE_TIME,           /* u64, read-only, msecs */
 124         NDTPA_BASE_REACHABLE_TIME,      /* u64, msecs */
 125         NDTPA_RETRANS_TIME,             /* u64, msecs */
 126         NDTPA_GC_STALETIME,             /* u64, msecs */
 127         NDTPA_DELAY_PROBE_TIME,         /* u64, msecs */
 128         NDTPA_QUEUE_LEN,                /* u32 */
 129         NDTPA_APP_PROBES,               /* u32 */
 130         NDTPA_UCAST_PROBES,             /* u32 */
 131         NDTPA_MCAST_PROBES,             /* u32 */
 132         NDTPA_ANYCAST_DELAY,            /* u64, msecs */
 133         NDTPA_PROXY_DELAY,              /* u64, msecs */
 134         NDTPA_PROXY_QLEN,               /* u32 */
 135         NDTPA_LOCKTIME,                 /* u64, msecs */
 136         NDTPA_QUEUE_LENBYTES,           /* u32 */
 137         NDTPA_MCAST_REPROBES,           /* u32 */
 138         NDTPA_PAD,
 139         __NDTPA_MAX
 140 };
 141 #define NDTPA_MAX (__NDTPA_MAX - 1)
 142
 143 struct ndtmsg {
 144         __u8            ndtm_family;
 145         __u8            ndtm_pad1;
 146         __u16           ndtm_pad2;
 147 };
 148
 149 struct ndt_config {
 150         __u16           ndtc_key_len;
 151         __u16           ndtc_entry_size;
 152         __u32           ndtc_entries;
 153         __u32           ndtc_last_flush;        /* delta to now in msecs */
 154         __u32           ndtc_last_rand;         /* delta to now in msecs */
 155         __u32           ndtc_hash_rnd;
 156         __u32           ndtc_hash_mask;
 157         __u32           ndtc_hash_chain_gc;
 158         __u32           ndtc_proxy_qlen;
 159 };
 160
 161 enum {
 162         NDTA_UNSPEC,
 163         NDTA_NAME,                      /* char *, unchangeable */
 164         NDTA_THRESH1,                   /* u32 */
 165         NDTA_THRESH2,                   /* u32 */
 166         NDTA_THRESH3,                   /* u32 */
 167         NDTA_CONFIG,                    /* struct ndt_config, read-only */
 168         NDTA_PARMS,                     /* nested TLV NDTPA_* */
 169         NDTA_STATS,                     /* struct ndt_stats, read-only */
 170         NDTA_GC_INTERVAL,               /* u64, msecs */
 171         NDTA_PAD,
 172         __NDTA_MAX
 173 };
 174 #define NDTA_MAX (__NDTA_MAX - 1)
 175
 176  /* FDB activity notification bits used in NFEA_ACTIVITY_NOTIFY:
 177   * - FDB_NOTIFY_BIT - notify on activity/expire for any entry
 178   * - FDB_NOTIFY_INACTIVE_BIT - mark as inactive to avoid multiple notifications
 179   */
 180 enum {
 181         FDB_NOTIFY_BIT          = (1 << 0),
 182         FDB_NOTIFY_INACTIVE_BIT = (1 << 1)
 183 };
 184
 185 /* embedded into NDA_FDB_EXT_ATTRS:
 186  * [NDA_FDB_EXT_ATTRS] = {
 187  *     [NFEA_ACTIVITY_NOTIFY]
 188  *     ...
 189  * }
 190  */
 191 enum {
 192         NFEA_UNSPEC,
 193         NFEA_ACTIVITY_NOTIFY,
 194         NFEA_DONT_REFRESH,
 195         __NFEA_MAX
 196 };
 197 #define NFEA_MAX (__NFEA_MAX - 1)
 198
 199 #endif