Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef __LINUX_NEIGHBOUR_H
3#define __LINUX_NEIGHBOUR_H
4
5#include <linux/types.h>
6#include <linux/netlink.h>
7
8struct ndmsg {
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 NDA_UNSPEC,
20 NDA_DST,
21 NDA_LLADDR,
22 NDA_CACHEINFO,
23 NDA_PROBES,
24 NDA_VLAN,
25 NDA_PORT,
26 NDA_VNI,
27 NDA_IFINDEX,
28 NDA_MASTER,
29 NDA_LINK_NETNSID,
30 NDA_SRC_VNI,
31 NDA_PROTOCOL, /* Originator of entry */
32 NDA_NH_ID,
33 NDA_FDB_EXT_ATTRS,
34 __NDA_MAX
35};
36
37#define NDA_MAX (__NDA_MAX - 1)
38
39/*
40 * Neighbor Cache Entry Flags
41 */
42
43#define NTF_USE 0x01
44#define NTF_SELF 0x02
45#define NTF_MASTER 0x04
46#define NTF_PROXY 0x08 /* == ATF_PUBL */
47#define NTF_EXT_LEARNED 0x10
48#define NTF_OFFLOADED 0x20
49#define NTF_STICKY 0x40
50#define NTF_ROUTER 0x80
51
52/*
53 * Neighbor Cache Entry States.
54 */
55
56#define NUD_INCOMPLETE 0x01
57#define NUD_REACHABLE 0x02
58#define NUD_STALE 0x04
59#define NUD_DELAY 0x08
60#define NUD_PROBE 0x10
61#define NUD_FAILED 0x20
62
63/* Dummy states */
64#define NUD_NOARP 0x40
65#define NUD_PERMANENT 0x80
66#define NUD_NONE 0x00
67
68/* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
69 and make no address resolution or NUD.
70 NUD_PERMANENT also cannot be deleted by garbage collectors.
71 */
72
73struct nda_cacheinfo {
74 __u32 ndm_confirmed;
75 __u32 ndm_used;
76 __u32 ndm_updated;
77 __u32 ndm_refcnt;
78};
79
80/*****************************************************************
81 * Neighbour tables specific messages.
82 *
83 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
84 * NLM_F_DUMP flag set. Every neighbour table configuration is
85 * spread over multiple messages to avoid running into message
86 * size limits on systems with many interfaces. The first message
87 * in the sequence transports all not device specific data such as
88 * statistics, configuration, and the default parameter set.
89 * This message is followed by 0..n messages carrying device
90 * specific parameter sets.
91 * Although the ordering should be sufficient, NDTA_NAME can be
92 * used to identify sequences. The initial message can be identified
93 * by checking for NDTA_CONFIG. The device specific messages do
94 * not contain this TLV but have NDTPA_IFINDEX set to the
95 * corresponding interface index.
96 *
97 * To change neighbour table attributes, send RTM_SETNEIGHTBL
98 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
99 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
100 * otherwise. Device specific parameter sets can be changed by
101 * setting NDTPA_IFINDEX to the interface index of the corresponding
102 * device.
103 ****/
104
105struct ndt_stats {
106 __u64 ndts_allocs;
107 __u64 ndts_destroys;
108 __u64 ndts_hash_grows;
109 __u64 ndts_res_failed;
110 __u64 ndts_lookups;
111 __u64 ndts_hits;
112 __u64 ndts_rcv_probes_mcast;
113 __u64 ndts_rcv_probes_ucast;
114 __u64 ndts_periodic_gc_runs;
115 __u64 ndts_forced_gc_runs;
116 __u64 ndts_table_fulls;
117};
118
119enum {
120 NDTPA_UNSPEC,
121 NDTPA_IFINDEX, /* u32, unchangeable */
122 NDTPA_REFCNT, /* u32, read-only */
123 NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */
124 NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */
125 NDTPA_RETRANS_TIME, /* u64, msecs */
126 NDTPA_GC_STALETIME, /* u64, msecs */
127 NDTPA_DELAY_PROBE_TIME, /* u64, msecs */
128 NDTPA_QUEUE_LEN, /* u32 */
129 NDTPA_APP_PROBES, /* u32 */
130 NDTPA_UCAST_PROBES, /* u32 */
131 NDTPA_MCAST_PROBES, /* u32 */
132 NDTPA_ANYCAST_DELAY, /* u64, msecs */
133 NDTPA_PROXY_DELAY, /* u64, msecs */
134 NDTPA_PROXY_QLEN, /* u32 */
135 NDTPA_LOCKTIME, /* u64, msecs */
136 NDTPA_QUEUE_LENBYTES, /* u32 */
137 NDTPA_MCAST_REPROBES, /* u32 */
138 NDTPA_PAD,
139 __NDTPA_MAX
140};
141#define NDTPA_MAX (__NDTPA_MAX - 1)
142
143struct ndtmsg {
144 __u8 ndtm_family;
145 __u8 ndtm_pad1;
146 __u16 ndtm_pad2;
147};
148
149struct ndt_config {
150 __u16 ndtc_key_len;
151 __u16 ndtc_entry_size;
152 __u32 ndtc_entries;
153 __u32 ndtc_last_flush; /* delta to now in msecs */
154 __u32 ndtc_last_rand; /* delta to now in msecs */
155 __u32 ndtc_hash_rnd;
156 __u32 ndtc_hash_mask;
157 __u32 ndtc_hash_chain_gc;
158 __u32 ndtc_proxy_qlen;
159};
160
161enum {
162 NDTA_UNSPEC,
163 NDTA_NAME, /* char *, unchangeable */
164 NDTA_THRESH1, /* u32 */
165 NDTA_THRESH2, /* u32 */
166 NDTA_THRESH3, /* u32 */
167 NDTA_CONFIG, /* struct ndt_config, read-only */
168 NDTA_PARMS, /* nested TLV NDTPA_* */
169 NDTA_STATS, /* struct ndt_stats, read-only */
170 NDTA_GC_INTERVAL, /* u64, msecs */
171 NDTA_PAD,
172 __NDTA_MAX
173};
174#define NDTA_MAX (__NDTA_MAX - 1)
175
176 /* FDB activity notification bits used in NFEA_ACTIVITY_NOTIFY:
177 * - FDB_NOTIFY_BIT - notify on activity/expire for any entry
178 * - FDB_NOTIFY_INACTIVE_BIT - mark as inactive to avoid multiple notifications
179 */
180enum {
181 FDB_NOTIFY_BIT = (1 << 0),
182 FDB_NOTIFY_INACTIVE_BIT = (1 << 1)
183};
184
185/* embedded into NDA_FDB_EXT_ATTRS:
186 * [NDA_FDB_EXT_ATTRS] = {
187 * [NFEA_ACTIVITY_NOTIFY]
188 * ...
189 * }
190 */
191enum {
192 NFEA_UNSPEC,
193 NFEA_ACTIVITY_NOTIFY,
194 NFEA_DONT_REFRESH,
195 __NFEA_MAX
196};
197#define NFEA_MAX (__NFEA_MAX - 1)
198
199#endif