1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef __LINUX_NEIGHBOUR_H
3 #define __LINUX_NEIGHBOUR_H
5 #include <linux/types.h>
6 #include <linux/netlink.h>
31 NDA_PROTOCOL, /* Originator of entry */
37 #define NDA_MAX (__NDA_MAX - 1)
40 * Neighbor Cache Entry Flags
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
53 * Neighbor Cache Entry States.
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
64 #define NUD_NOARP 0x40
65 #define NUD_PERMANENT 0x80
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 * When NTF_EXT_LEARNED is set for a bridge fdb entry the different cache entry
72 * states don't make sense and thus are ignored. Such entries don't age and
76 struct nda_cacheinfo {
83 /*****************************************************************
84 * Neighbour tables specific messages.
86 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the
87 * NLM_F_DUMP flag set. Every neighbour table configuration is
88 * spread over multiple messages to avoid running into message
89 * size limits on systems with many interfaces. The first message
90 * in the sequence transports all not device specific data such as
91 * statistics, configuration, and the default parameter set.
92 * This message is followed by 0..n messages carrying device
93 * specific parameter sets.
94 * Although the ordering should be sufficient, NDTA_NAME can be
95 * used to identify sequences. The initial message can be identified
96 * by checking for NDTA_CONFIG. The device specific messages do
97 * not contain this TLV but have NDTPA_IFINDEX set to the
98 * corresponding interface index.
100 * To change neighbour table attributes, send RTM_SETNEIGHTBL
101 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],
102 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked
103 * otherwise. Device specific parameter sets can be changed by
104 * setting NDTPA_IFINDEX to the interface index of the corresponding
111 __u64 ndts_hash_grows;
112 __u64 ndts_res_failed;
115 __u64 ndts_rcv_probes_mcast;
116 __u64 ndts_rcv_probes_ucast;
117 __u64 ndts_periodic_gc_runs;
118 __u64 ndts_forced_gc_runs;
119 __u64 ndts_table_fulls;
124 NDTPA_IFINDEX, /* u32, unchangeable */
125 NDTPA_REFCNT, /* u32, read-only */
126 NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */
127 NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */
128 NDTPA_RETRANS_TIME, /* u64, msecs */
129 NDTPA_GC_STALETIME, /* u64, msecs */
130 NDTPA_DELAY_PROBE_TIME, /* u64, msecs */
131 NDTPA_QUEUE_LEN, /* u32 */
132 NDTPA_APP_PROBES, /* u32 */
133 NDTPA_UCAST_PROBES, /* u32 */
134 NDTPA_MCAST_PROBES, /* u32 */
135 NDTPA_ANYCAST_DELAY, /* u64, msecs */
136 NDTPA_PROXY_DELAY, /* u64, msecs */
137 NDTPA_PROXY_QLEN, /* u32 */
138 NDTPA_LOCKTIME, /* u64, msecs */
139 NDTPA_QUEUE_LENBYTES, /* u32 */
140 NDTPA_MCAST_REPROBES, /* u32 */
144 #define NDTPA_MAX (__NDTPA_MAX - 1)
154 __u16 ndtc_entry_size;
156 __u32 ndtc_last_flush; /* delta to now in msecs */
157 __u32 ndtc_last_rand; /* delta to now in msecs */
159 __u32 ndtc_hash_mask;
160 __u32 ndtc_hash_chain_gc;
161 __u32 ndtc_proxy_qlen;
166 NDTA_NAME, /* char *, unchangeable */
167 NDTA_THRESH1, /* u32 */
168 NDTA_THRESH2, /* u32 */
169 NDTA_THRESH3, /* u32 */
170 NDTA_CONFIG, /* struct ndt_config, read-only */
171 NDTA_PARMS, /* nested TLV NDTPA_* */
172 NDTA_STATS, /* struct ndt_stats, read-only */
173 NDTA_GC_INTERVAL, /* u64, msecs */
177 #define NDTA_MAX (__NDTA_MAX - 1)
179 /* FDB activity notification bits used in NFEA_ACTIVITY_NOTIFY:
180 * - FDB_NOTIFY_BIT - notify on activity/expire for any entry
181 * - FDB_NOTIFY_INACTIVE_BIT - mark as inactive to avoid multiple notifications
184 FDB_NOTIFY_BIT = (1 << 0),
185 FDB_NOTIFY_INACTIVE_BIT = (1 << 1)
188 /* embedded into NDA_FDB_EXT_ATTRS:
189 * [NDA_FDB_EXT_ATTRS] = {
190 * [NFEA_ACTIVITY_NOTIFY]
196 NFEA_ACTIVITY_NOTIFY,
200 #define NFEA_MAX (__NFEA_MAX - 1)