neighbour.h revision 1a441f49ec87ef74b978d7ae17da2a9b2ca6e811 
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	__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
17enum {
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
57struct 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
89struct 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
102enum {
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
123struct ndtmsg {
124	__u8		ndtm_family;
125	__u8		ndtm_pad1;
126	__u16		ndtm_pad2;
127};
128
129struct 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
141enum {
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