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_MAX
32};
33
34#define NDA_MAX (__NDA_MAX - 1)
35
36/*
37 * Neighbor Cache Entry Flags
38 */
39
40#define NTF_USE 0x01
41#define NTF_SELF 0x02
42#define NTF_MASTER 0x04
43#define NTF_PROXY 0x08 /* == ATF_PUBL */
44#define NTF_EXT_LEARNED 0x10
45#define NTF_OFFLOADED 0x20
46#define NTF_ROUTER 0x80
47
48/*
49 * Neighbor Cache Entry States.
50 */
51
52#define NUD_INCOMPLETE 0x01
53#define NUD_REACHABLE 0x02
54#define NUD_STALE 0x04
55#define NUD_DELAY 0x08
56#define NUD_PROBE 0x10
57#define NUD_FAILED 0x20
58
59/* Dummy states */
60#define NUD_NOARP 0x40
61#define NUD_PERMANENT 0x80
62#define NUD_NONE 0x00
63
64/* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
65 and make no address resolution or NUD.
66 NUD_PERMANENT also cannot be deleted by garbage collectors.
67 */
68
69struct nda_cacheinfo {
70 __u32 ndm_confirmed;
71 __u32 ndm_used;
72 __u32 ndm_updated;
73 __u32 ndm_refcnt;
74};
75
76/*****************************************************************
77 * Neighbour tables specific messages.
78 *
79 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
80 * NLM_F_DUMP flag set. Every neighbour table configuration is
81 * spread over multiple messages to avoid running into message
82 * size limits on systems with many interfaces. The first message
83 * in the sequence transports all not device specific data such as
84 * statistics, configuration, and the default parameter set.
85 * This message is followed by 0..n messages carrying device
86 * specific parameter sets.
87 * Although the ordering should be sufficient, NDTA_NAME can be
88 * used to identify sequences. The initial message can be identified
89 * by checking for NDTA_CONFIG. The device specific messages do
90 * not contain this TLV but have NDTPA_IFINDEX set to the
91 * corresponding interface index.
92 *
93 * To change neighbour table attributes, send RTM_SETNEIGHTBL
94 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
95 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
96 * otherwise. Device specific parameter sets can be changed by
97 * setting NDTPA_IFINDEX to the interface index of the corresponding
98 * device.
99 ****/
100
101struct ndt_stats {
102 __u64 ndts_allocs;
103 __u64 ndts_destroys;
104 __u64 ndts_hash_grows;
105 __u64 ndts_res_failed;
106 __u64 ndts_lookups;
107 __u64 ndts_hits;
108 __u64 ndts_rcv_probes_mcast;
109 __u64 ndts_rcv_probes_ucast;
110 __u64 ndts_periodic_gc_runs;
111 __u64 ndts_forced_gc_runs;
112 __u64 ndts_table_fulls;
113};
114
115enum {
116 NDTPA_UNSPEC,
117 NDTPA_IFINDEX, /* u32, unchangeable */
118 NDTPA_REFCNT, /* u32, read-only */
119 NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */
120 NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */
121 NDTPA_RETRANS_TIME, /* u64, msecs */
122 NDTPA_GC_STALETIME, /* u64, msecs */
123 NDTPA_DELAY_PROBE_TIME, /* u64, msecs */
124 NDTPA_QUEUE_LEN, /* u32 */
125 NDTPA_APP_PROBES, /* u32 */
126 NDTPA_UCAST_PROBES, /* u32 */
127 NDTPA_MCAST_PROBES, /* u32 */
128 NDTPA_ANYCAST_DELAY, /* u64, msecs */
129 NDTPA_PROXY_DELAY, /* u64, msecs */
130 NDTPA_PROXY_QLEN, /* u32 */
131 NDTPA_LOCKTIME, /* u64, msecs */
132 NDTPA_QUEUE_LENBYTES, /* u32 */
133 NDTPA_MCAST_REPROBES, /* u32 */
134 NDTPA_PAD,
135 __NDTPA_MAX
136};
137#define NDTPA_MAX (__NDTPA_MAX - 1)
138
139struct ndtmsg {
140 __u8 ndtm_family;
141 __u8 ndtm_pad1;
142 __u16 ndtm_pad2;
143};
144
145struct ndt_config {
146 __u16 ndtc_key_len;
147 __u16 ndtc_entry_size;
148 __u32 ndtc_entries;
149 __u32 ndtc_last_flush; /* delta to now in msecs */
150 __u32 ndtc_last_rand; /* delta to now in msecs */
151 __u32 ndtc_hash_rnd;
152 __u32 ndtc_hash_mask;
153 __u32 ndtc_hash_chain_gc;
154 __u32 ndtc_proxy_qlen;
155};
156
157enum {
158 NDTA_UNSPEC,
159 NDTA_NAME, /* char *, unchangeable */
160 NDTA_THRESH1, /* u32 */
161 NDTA_THRESH2, /* u32 */
162 NDTA_THRESH3, /* u32 */
163 NDTA_CONFIG, /* struct ndt_config, read-only */
164 NDTA_PARMS, /* nested TLV NDTPA_* */
165 NDTA_STATS, /* struct ndt_stats, read-only */
166 NDTA_GC_INTERVAL, /* u64, msecs */
167 NDTA_PAD,
168 __NDTA_MAX
169};
170#define NDTA_MAX (__NDTA_MAX - 1)
171
172#endif