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