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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 {
      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 {
     20 	NDA_UNSPEC,
     21 	NDA_DST,
     22 	NDA_LLADDR,
     23 	NDA_CACHEINFO,
     24 	NDA_PROBES,
     25 	__NDA_MAX
     26 };
     27 
     28 #define NDA_MAX (__NDA_MAX - 1)
     29 
     30 /*
     31  *	Neighbor Cache Entry Flags
     32  */
     33 
     34 #define NTF_USE		0x01
     35 #define NTF_PROXY	0x08	/* == ATF_PUBL */
     36 #define NTF_ROUTER	0x80
     37 
     38 /*
     39  *	Neighbor Cache Entry States.
     40  */
     41 
     42 #define NUD_INCOMPLETE	0x01
     43 #define NUD_REACHABLE	0x02
     44 #define NUD_STALE	0x04
     45 #define NUD_DELAY	0x08
     46 #define NUD_PROBE	0x10
     47 #define NUD_FAILED	0x20
     48 
     49 /* Dummy states */
     50 #define NUD_NOARP	0x40
     51 #define NUD_PERMANENT	0x80
     52 #define NUD_NONE	0x00
     53 
     54 /* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
     55    and make no address resolution or NUD.
     56    NUD_PERMANENT is also cannot be deleted by garbage collectors.
     57  */
     58 
     59 struct nda_cacheinfo
     60 {
     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 {
     94 	__u64		ndts_allocs;
     95 	__u64		ndts_destroys;
     96 	__u64		ndts_hash_grows;
     97 	__u64		ndts_res_failed;
     98 	__u64		ndts_lookups;
     99 	__u64		ndts_hits;
    100 	__u64		ndts_rcv_probes_mcast;
    101 	__u64		ndts_rcv_probes_ucast;
    102 	__u64		ndts_periodic_gc_runs;
    103 	__u64		ndts_forced_gc_runs;
    104 };
    105 
    106 enum {
    107 	NDTPA_UNSPEC,
    108 	NDTPA_IFINDEX,			/* u32, unchangeable */
    109 	NDTPA_REFCNT,			/* u32, read-only */
    110 	NDTPA_REACHABLE_TIME,		/* u64, read-only, msecs */
    111 	NDTPA_BASE_REACHABLE_TIME,	/* u64, msecs */
    112 	NDTPA_RETRANS_TIME,		/* u64, msecs */
    113 	NDTPA_GC_STALETIME,		/* u64, msecs */
    114 	NDTPA_DELAY_PROBE_TIME,		/* u64, msecs */
    115 	NDTPA_QUEUE_LEN,		/* u32 */
    116 	NDTPA_APP_PROBES,		/* u32 */
    117 	NDTPA_UCAST_PROBES,		/* u32 */
    118 	NDTPA_MCAST_PROBES,		/* u32 */
    119 	NDTPA_ANYCAST_DELAY,		/* u64, msecs */
    120 	NDTPA_PROXY_DELAY,		/* u64, msecs */
    121 	NDTPA_PROXY_QLEN,		/* u32 */
    122 	NDTPA_LOCKTIME,			/* u64, msecs */
    123 	__NDTPA_MAX
    124 };
    125 #define NDTPA_MAX (__NDTPA_MAX - 1)
    126 
    127 struct ndtmsg
    128 {
    129 	__u8		ndtm_family;
    130 	__u8		ndtm_pad1;
    131 	__u16		ndtm_pad2;
    132 };
    133 
    134 struct ndt_config
    135 {
    136 	__u16		ndtc_key_len;
    137 	__u16		ndtc_entry_size;
    138 	__u32		ndtc_entries;
    139 	__u32		ndtc_last_flush;	/* delta to now in msecs */
    140 	__u32		ndtc_last_rand;		/* delta to now in msecs */
    141 	__u32		ndtc_hash_rnd;
    142 	__u32		ndtc_hash_mask;
    143 	__u32		ndtc_hash_chain_gc;
    144 	__u32		ndtc_proxy_qlen;
    145 };
    146 
    147 enum {
    148 	NDTA_UNSPEC,
    149 	NDTA_NAME,			/* char *, unchangeable */
    150 	NDTA_THRESH1,			/* u32 */
    151 	NDTA_THRESH2,			/* u32 */
    152 	NDTA_THRESH3,			/* u32 */
    153 	NDTA_CONFIG,			/* struct ndt_config, read-only */
    154 	NDTA_PARMS,			/* nested TLV NDTPA_* */
    155 	NDTA_STATS,			/* struct ndt_stats, read-only */
    156 	NDTA_GC_INTERVAL,		/* u64, msecs */
    157 	__NDTA_MAX
    158 };
    159 #define NDTA_MAX (__NDTA_MAX - 1)
    160 
    161 #endif
    162