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.
73 struct nda_cacheinfo {
80 /*****************************************************************
81 * Neighbour tables specific messages.
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.
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
108 __u64 ndts_hash_grows;
109 __u64 ndts_res_failed;
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;
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 */
141 #define NDTPA_MAX (__NDTPA_MAX - 1)
151 __u16 ndtc_entry_size;
153 __u32 ndtc_last_flush; /* delta to now in msecs */
154 __u32 ndtc_last_rand; /* delta to now in msecs */
156 __u32 ndtc_hash_mask;
157 __u32 ndtc_hash_chain_gc;
158 __u32 ndtc_proxy_qlen;
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 */
174 #define NDTA_MAX (__NDTA_MAX - 1)
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
181 FDB_NOTIFY_BIT = (1 << 0),
182 FDB_NOTIFY_INACTIVE_BIT = (1 << 1)
185 /* embedded into NDA_FDB_EXT_ATTRS:
186 * [NDA_FDB_EXT_ATTRS] = {
187 * [NFEA_ACTIVITY_NOTIFY]
193 NFEA_ACTIVITY_NOTIFY,
197 #define NFEA_MAX (__NFEA_MAX - 1)