neighbour.h revision c40bba6922b470c0fd0c7a7b8b09584527c468e9 
1#ifndef __LINUX_NEIGHBOUR_H
2#define __LINUX_NEIGHBOUR_H
3
4#include <linux/types.h>
5#include <linux/netlink.h>
6
7struct 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
18enum
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
59struct 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
92struct 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
106enum {
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
127struct ndtmsg
128{
129	__u8		ndtm_family;
130	__u8		ndtm_pad1;
131	__u16		ndtm_pad2;
132};
133
134struct 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
147enum {
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