/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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#ifndef __LINUX_NEIGHBOUR_H

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#define __LINUX_NEIGHBOUR_H

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#include <linux/types.h>

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#include <linux/netlink.h>

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struct ndmsg {

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__u8 ndm_family;

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__u8 ndm_pad1;

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__u16 ndm_pad2;

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__s32 ndm_ifindex;

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__u16 ndm_state;

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__u8 ndm_flags;

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__u8 ndm_type;

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};

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enum {

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NDA_UNSPEC,

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NDA_DST,

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NDA_LLADDR,

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NDA_CACHEINFO,

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NDA_PROBES,

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NDA_VLAN,

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NDA_PORT,

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NDA_VNI,

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NDA_IFINDEX,

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NDA_MASTER,

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NDA_LINK_NETNSID,

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NDA_SRC_VNI,

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NDA_PROTOCOL, /* Originator of entry */

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__RH_RESERVED_NDA_NH_ID,

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NDA_FDB_EXT_ATTRS,

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__NDA_MAX

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};

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#define NDA_MAX (__NDA_MAX - 1)

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/*

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* Neighbor Cache Entry Flags

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*/

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#define NTF_USE 0x01

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#define NTF_SELF 0x02

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#define NTF_MASTER 0x04

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#define NTF_PROXY 0x08 /* == ATF_PUBL */

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#define NTF_EXT_LEARNED 0x10

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#define NTF_OFFLOADED 0x20

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#define NTF_STICKY 0x40

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#define NTF_ROUTER 0x80

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/*

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* Neighbor Cache Entry States.

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*/

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#define NUD_INCOMPLETE 0x01

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#define NUD_REACHABLE 0x02

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#define NUD_STALE 0x04

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#define NUD_DELAY 0x08

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#define NUD_PROBE 0x10

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#define NUD_FAILED 0x20

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/* Dummy states */

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#define NUD_NOARP 0x40

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#define NUD_PERMANENT 0x80

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#define NUD_NONE 0x00

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/* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change

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* and make no address resolution or NUD.

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* NUD_PERMANENT also cannot be deleted by garbage collectors.

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* When NTF_EXT_LEARNED is set for a bridge fdb entry the different cache entry

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* states don't make sense and thus are ignored. Such entries don't age and

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* can roam.

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*/

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struct nda_cacheinfo {

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__u32 ndm_confirmed;

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__u32 ndm_used;

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__u32 ndm_updated;

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__u32 ndm_refcnt;

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};

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/*****************************************************************

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* Neighbour tables specific messages.

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*

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* To retrieve the neighbour tables send RTM_GETNEIGHTBL with the

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* NLM_F_DUMP flag set. Every neighbour table configuration is

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* spread over multiple messages to avoid running into message

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* size limits on systems with many interfaces. The first message

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* in the sequence transports all not device specific data such as

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* statistics, configuration, and the default parameter set.

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* This message is followed by 0..n messages carrying device

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* specific parameter sets.

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* Although the ordering should be sufficient, NDTA_NAME can be

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* used to identify sequences. The initial message can be identified

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* by checking for NDTA_CONFIG. The device specific messages do

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* not contain this TLV but have NDTPA_IFINDEX set to the

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* corresponding interface index.

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*

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* To change neighbour table attributes, send RTM_SETNEIGHTBL

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* with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3],

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* NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked

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* otherwise. Device specific parameter sets can be changed by

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* setting NDTPA_IFINDEX to the interface index of the corresponding

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* device.

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****/

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struct ndt_stats {

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__u64 ndts_allocs;

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__u64 ndts_destroys;

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__u64 ndts_hash_grows;

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__u64 ndts_res_failed;

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__u64 ndts_lookups;

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__u64 ndts_hits;

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__u64 ndts_rcv_probes_mcast;

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__u64 ndts_rcv_probes_ucast;

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__u64 ndts_periodic_gc_runs;

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__u64 ndts_forced_gc_runs;

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__u64 ndts_table_fulls;

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};

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enum {

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NDTPA_UNSPEC,

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NDTPA_IFINDEX, /* u32, unchangeable */

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NDTPA_REFCNT, /* u32, read-only */

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NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */

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NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */

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NDTPA_RETRANS_TIME, /* u64, msecs */

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NDTPA_GC_STALETIME, /* u64, msecs */

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NDTPA_DELAY_PROBE_TIME, /* u64, msecs */

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NDTPA_QUEUE_LEN, /* u32 */

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NDTPA_APP_PROBES, /* u32 */

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NDTPA_UCAST_PROBES, /* u32 */

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NDTPA_MCAST_PROBES, /* u32 */

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NDTPA_ANYCAST_DELAY, /* u64, msecs */

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NDTPA_PROXY_DELAY, /* u64, msecs */

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NDTPA_PROXY_QLEN, /* u32 */

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NDTPA_LOCKTIME, /* u64, msecs */

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NDTPA_QUEUE_LENBYTES, /* u32 */

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NDTPA_MCAST_REPROBES, /* u32 */

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NDTPA_PAD,

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__NDTPA_MAX

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};

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#define NDTPA_MAX (__NDTPA_MAX - 1)

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struct ndtmsg {

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__u8 ndtm_family;

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__u8 ndtm_pad1;

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__u16 ndtm_pad2;

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};

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struct ndt_config {

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__u16 ndtc_key_len;

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__u16 ndtc_entry_size;

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__u32 ndtc_entries;

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__u32 ndtc_last_flush; /* delta to now in msecs */

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__u32 ndtc_last_rand; /* delta to now in msecs */

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__u32 ndtc_hash_rnd;

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__u32 ndtc_hash_mask;

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__u32 ndtc_hash_chain_gc;

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__u32 ndtc_proxy_qlen;

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};

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enum {

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NDTA_UNSPEC,

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NDTA_NAME, /* char *, unchangeable */

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NDTA_THRESH1, /* u32 */

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NDTA_THRESH2, /* u32 */

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NDTA_THRESH3, /* u32 */

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NDTA_CONFIG, /* struct ndt_config, read-only */

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NDTA_PARMS, /* nested TLV NDTPA_* */

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NDTA_STATS, /* struct ndt_stats, read-only */

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NDTA_GC_INTERVAL, /* u64, msecs */

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NDTA_PAD,

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__NDTA_MAX

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};

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#define NDTA_MAX (__NDTA_MAX - 1)

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/* FDB activity notification bits used in NFEA_ACTIVITY_NOTIFY:

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* - FDB_NOTIFY_BIT - notify on activity/expire for any entry

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* - FDB_NOTIFY_INACTIVE_BIT - mark as inactive to avoid multiple notifications

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*/

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enum {

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FDB_NOTIFY_BIT = (1 << 0),

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FDB_NOTIFY_INACTIVE_BIT = (1 << 1)

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};

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/* embedded into NDA_FDB_EXT_ATTRS:

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* [NDA_FDB_EXT_ATTRS] = {

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* [NFEA_ACTIVITY_NOTIFY]

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* ...

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* }

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*/

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enum {

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NFEA_UNSPEC,

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NFEA_ACTIVITY_NOTIFY,

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NFEA_DONT_REFRESH,

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__NFEA_MAX

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};

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#define NFEA_MAX (__NFEA_MAX - 1)

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#endif

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