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
8 struct 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
18 enum {
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_MAX
33 };
34
35 #define NDA_MAX (__NDA_MAX - 1)
36
37 /*
38 * Neighbor Cache Entry Flags
39 */
40
41 #define NTF_USE 0x01
42 #define NTF_SELF 0x02
43 #define NTF_MASTER 0x04
44 #define NTF_PROXY 0x08 /* == ATF_PUBL */
45 #define NTF_EXT_LEARNED 0x10
46 #define NTF_OFFLOADED 0x20
47 #define NTF_STICKY 0x40
48 #define NTF_ROUTER 0x80
49
50 /*
51 * Neighbor Cache Entry States.
52 */
53
54 #define NUD_INCOMPLETE 0x01
55 #define NUD_REACHABLE 0x02
56 #define NUD_STALE 0x04
57 #define NUD_DELAY 0x08
58 #define NUD_PROBE 0x10
59 #define NUD_FAILED 0x20
60
61 /* Dummy states */
62 #define NUD_NOARP 0x40
63 #define NUD_PERMANENT 0x80
64 #define NUD_NONE 0x00
65
66 /* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change
67 and make no address resolution or NUD.
68 NUD_PERMANENT also cannot be deleted by garbage collectors.
69 */
70
71 struct nda_cacheinfo {
72 __u32 ndm_confirmed;
73 __u32 ndm_used;
74 __u32 ndm_updated;
75 __u32 ndm_refcnt;
76 };
77
78 /*****************************************************************
79 * Neighbour tables specific messages.
80 *
81 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
82 * NLM_F_DUMP flag set. Every neighbour table configuration is
83 * spread over multiple messages to avoid running into message
84 * size limits on systems with many interfaces. The first message
85 * in the sequence transports all not device specific data such as
86 * statistics, configuration, and the default parameter set.
87 * This message is followed by 0..n messages carrying device
88 * specific parameter sets.
89 * Although the ordering should be sufficient, NDTA_NAME can be
90 * used to identify sequences. The initial message can be identified
91 * by checking for NDTA_CONFIG. The device specific messages do
92 * not contain this TLV but have NDTPA_IFINDEX set to the
93 * corresponding interface index.
94 *
95 * To change neighbour table attributes, send RTM_SETNEIGHTBL
96 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
97 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
98 * otherwise. Device specific parameter sets can be changed by
99 * setting NDTPA_IFINDEX to the interface index of the corresponding
100 * device.
101 ****/
102
103 struct ndt_stats {
104 __u64 ndts_allocs;
105 __u64 ndts_destroys;
106 __u64 ndts_hash_grows;
107 __u64 ndts_res_failed;
108 __u64 ndts_lookups;
109 __u64 ndts_hits;
110 __u64 ndts_rcv_probes_mcast;
111 __u64 ndts_rcv_probes_ucast;
112 __u64 ndts_periodic_gc_runs;
113 __u64 ndts_forced_gc_runs;
114 __u64 ndts_table_fulls;
115 };
116
117 enum {
118 NDTPA_UNSPEC,
119 NDTPA_IFINDEX, /* u32, unchangeable */
120 NDTPA_REFCNT, /* u32, read-only */
121 NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */
122 NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */
123 NDTPA_RETRANS_TIME, /* u64, msecs */
124 NDTPA_GC_STALETIME, /* u64, msecs */
125 NDTPA_DELAY_PROBE_TIME, /* u64, msecs */
126 NDTPA_QUEUE_LEN, /* u32 */
127 NDTPA_APP_PROBES, /* u32 */
128 NDTPA_UCAST_PROBES, /* u32 */
129 NDTPA_MCAST_PROBES, /* u32 */
130 NDTPA_ANYCAST_DELAY, /* u64, msecs */
131 NDTPA_PROXY_DELAY, /* u64, msecs */
132 NDTPA_PROXY_QLEN, /* u32 */
133 NDTPA_LOCKTIME, /* u64, msecs */
134 NDTPA_QUEUE_LENBYTES, /* u32 */
135 NDTPA_MCAST_REPROBES, /* u32 */
136 NDTPA_PAD,
137 __NDTPA_MAX
138 };
139 #define NDTPA_MAX (__NDTPA_MAX - 1)
140
141 struct ndtmsg {
142 __u8 ndtm_family;
143 __u8 ndtm_pad1;
144 __u16 ndtm_pad2;
145 };
146
147 struct ndt_config {
148 __u16 ndtc_key_len;
149 __u16 ndtc_entry_size;
150 __u32 ndtc_entries;
151 __u32 ndtc_last_flush; /* delta to now in msecs */
152 __u32 ndtc_last_rand; /* delta to now in msecs */
153 __u32 ndtc_hash_rnd;
154 __u32 ndtc_hash_mask;
155 __u32 ndtc_hash_chain_gc;
156 __u32 ndtc_proxy_qlen;
157 };
158
159 enum {
160 NDTA_UNSPEC,
161 NDTA_NAME, /* char *, unchangeable */
162 NDTA_THRESH1, /* u32 */
163 NDTA_THRESH2, /* u32 */
164 NDTA_THRESH3, /* u32 */
165 NDTA_CONFIG, /* struct ndt_config, read-only */
166 NDTA_PARMS, /* nested TLV NDTPA_* */
167 NDTA_STATS, /* struct ndt_stats, read-only */
168 NDTA_GC_INTERVAL, /* u64, msecs */
169 NDTA_PAD,
170 __NDTA_MAX
171 };
172 #define NDTA_MAX (__NDTA_MAX - 1)
173
174 #endif