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