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