216 lines
5.6 KiB
C
216 lines
5.6 KiB
C
/* 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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NDA_NH_ID,
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NDA_FDB_EXT_ATTRS,
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NDA_FLAGS_EXT,
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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 (1 << 0)
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#define NTF_SELF (1 << 1)
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#define NTF_MASTER (1 << 2)
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#define NTF_PROXY (1 << 3) /* == ATF_PUBL */
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#define NTF_EXT_LEARNED (1 << 4)
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#define NTF_OFFLOADED (1 << 5)
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#define NTF_STICKY (1 << 6)
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#define NTF_ROUTER (1 << 7)
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/* Extended flags under NDA_FLAGS_EXT: */
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#define NTF_EXT_MANAGED (1 << 0)
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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 and make no
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* address resolution or NUD.
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*
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* NUD_PERMANENT also cannot be deleted by garbage collectors. This holds true
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* for dynamic entries with NTF_EXT_LEARNED flag as well. However, upon carrier
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* down event, NUD_PERMANENT entries are not flushed whereas NTF_EXT_LEARNED
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* flagged entries explicitly are (which is also consistent with the routing
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* subsystem).
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*
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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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* NTF_EXT_MANAGED flagged neigbor entries are managed by the kernel on behalf
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* of a user space control plane, and automatically refreshed so that (if
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* possible) they remain in NUD_REACHABLE state.
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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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