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 */
35 #define NDA_MAX (__NDA_MAX - 1)
38 * Neighbor Cache Entry Flags
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
51 * Neighbor Cache Entry States.
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
62 #define NUD_NOARP 0x40
63 #define NUD_PERMANENT 0x80
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.
71 struct nda_cacheinfo {
78 /*****************************************************************
79 * Neighbour tables specific messages.
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.
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
106 __u64 ndts_hash_grows;
107 __u64 ndts_res_failed;
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;
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 */
139 #define NDTPA_MAX (__NDTPA_MAX - 1)
149 __u16 ndtc_entry_size;
151 __u32 ndtc_last_flush; /* delta to now in msecs */
152 __u32 ndtc_last_rand; /* delta to now in msecs */
154 __u32 ndtc_hash_mask;
155 __u32 ndtc_hash_chain_gc;
156 __u32 ndtc_proxy_qlen;
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 */
172 #define NDTA_MAX (__NDTA_MAX - 1)