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neighbour.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef __LINUX_NEIGHBOUR_H #define __LINUX_NEIGHBOUR_H #include <linux/types.h> #include <linux/netlink.h> struct ndmsg { __u8 ndm_family; __u8 ndm_pad1; __u16 ndm_pad2; __s32 ndm_ifindex; __u16 ndm_state; __u8 ndm_flags; __u8 ndm_type; }; enum { NDA_UNSPEC, NDA_DST, NDA_LLADDR, NDA_CACHEINFO, NDA_PROBES, NDA_VLAN, NDA_PORT, NDA_VNI, NDA_IFINDEX, NDA_MASTER, NDA_LINK_NETNSID, NDA_SRC_VNI, NDA_PROTOCOL, /* Originator of entry */ NDA_NH_ID, NDA_FDB_EXT_ATTRS, NDA_FLAGS_EXT, NDA_NDM_STATE_MASK, NDA_NDM_FLAGS_MASK, __NDA_MAX }; #define NDA_MAX (__NDA_MAX - 1) /* * Neighbor Cache Entry Flags */ #define NTF_USE (1 << 0) #define NTF_SELF (1 << 1) #define NTF_MASTER (1 << 2) #define NTF_PROXY (1 << 3) /* == ATF_PUBL */ #define NTF_EXT_LEARNED (1 << 4) #define NTF_OFFLOADED (1 << 5) #define NTF_STICKY (1 << 6) #define NTF_ROUTER (1 << 7) /* Extended flags under NDA_FLAGS_EXT: */ #define NTF_EXT_MANAGED (1 << 0) #define NTF_EXT_LOCKED (1 << 1) /* * Neighbor Cache Entry States. */ #define NUD_INCOMPLETE 0x01 #define NUD_REACHABLE 0x02 #define NUD_STALE 0x04 #define NUD_DELAY 0x08 #define NUD_PROBE 0x10 #define NUD_FAILED 0x20 /* Dummy states */ #define NUD_NOARP 0x40 #define NUD_PERMANENT 0x80 #define NUD_NONE 0x00 /* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change and make no * address resolution or NUD. * * NUD_PERMANENT also cannot be deleted by garbage collectors. This holds true * for dynamic entries with NTF_EXT_LEARNED flag as well. However, upon carrier * down event, NUD_PERMANENT entries are not flushed whereas NTF_EXT_LEARNED * flagged entries explicitly are (which is also consistent with the routing * subsystem). * * When NTF_EXT_LEARNED is set for a bridge fdb entry the different cache entry * states don't make sense and thus are ignored. Such entries don't age and * can roam. * * NTF_EXT_MANAGED flagged neigbor entries are managed by the kernel on behalf * of a user space control plane, and automatically refreshed so that (if * possible) they remain in NUD_REACHABLE state. * * NTF_EXT_LOCKED flagged bridge FDB entries are entries generated by the * bridge in response to a host trying to communicate via a locked bridge port * with MAB enabled. Their purpose is to notify user space that a host requires * authentication. */ struct nda_cacheinfo { __u32 ndm_confirmed; __u32 ndm_used; __u32 ndm_updated; __u32 ndm_refcnt; }; /***************************************************************** * Neighbour tables specific messages. * * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the * NLM_F_DUMP flag set. Every neighbour table configuration is * spread over multiple messages to avoid running into message * size limits on systems with many interfaces. The first message * in the sequence transports all not device specific data such as * statistics, configuration, and the default parameter set. * This message is followed by 0..n messages carrying device * specific parameter sets. * Although the ordering should be sufficient, NDTA_NAME can be * used to identify sequences. The initial message can be identified * by checking for NDTA_CONFIG. The device specific messages do * not contain this TLV but have NDTPA_IFINDEX set to the * corresponding interface index. * * To change neighbour table attributes, send RTM_SETNEIGHTBL * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3], * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked * otherwise. Device specific parameter sets can be changed by * setting NDTPA_IFINDEX to the interface index of the corresponding * device. ****/ struct ndt_stats { __u64 ndts_allocs; __u64 ndts_destroys; __u64 ndts_hash_grows; __u64 ndts_res_failed; __u64 ndts_lookups; __u64 ndts_hits; __u64 ndts_rcv_probes_mcast; __u64 ndts_rcv_probes_ucast; __u64 ndts_periodic_gc_runs; __u64 ndts_forced_gc_runs; __u64 ndts_table_fulls; }; enum { NDTPA_UNSPEC, NDTPA_IFINDEX, /* u32, unchangeable */ NDTPA_REFCNT, /* u32, read-only */ NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */ NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */ NDTPA_RETRANS_TIME, /* u64, msecs */ NDTPA_GC_STALETIME, /* u64, msecs */ NDTPA_DELAY_PROBE_TIME, /* u64, msecs */ NDTPA_QUEUE_LEN, /* u32 */ NDTPA_APP_PROBES, /* u32 */ NDTPA_UCAST_PROBES, /* u32 */ NDTPA_MCAST_PROBES, /* u32 */ NDTPA_ANYCAST_DELAY, /* u64, msecs */ NDTPA_PROXY_DELAY, /* u64, msecs */ NDTPA_PROXY_QLEN, /* u32 */ NDTPA_LOCKTIME, /* u64, msecs */ NDTPA_QUEUE_LENBYTES, /* u32 */ NDTPA_MCAST_REPROBES, /* u32 */ NDTPA_PAD, NDTPA_INTERVAL_PROBE_TIME_MS, /* u64, msecs */ __NDTPA_MAX }; #define NDTPA_MAX (__NDTPA_MAX - 1) struct ndtmsg { __u8 ndtm_family; __u8 ndtm_pad1; __u16 ndtm_pad2; }; struct ndt_config { __u16 ndtc_key_len; __u16 ndtc_entry_size; __u32 ndtc_entries; __u32 ndtc_last_flush; /* delta to now in msecs */ __u32 ndtc_last_rand; /* delta to now in msecs */ __u32 ndtc_hash_rnd; __u32 ndtc_hash_mask; __u32 ndtc_hash_chain_gc; __u32 ndtc_proxy_qlen; }; enum { NDTA_UNSPEC, NDTA_NAME, /* char *, unchangeable */ NDTA_THRESH1, /* u32 */ NDTA_THRESH2, /* u32 */ NDTA_THRESH3, /* u32 */ NDTA_CONFIG, /* struct ndt_config, read-only */ NDTA_PARMS, /* nested TLV NDTPA_* */ NDTA_STATS, /* struct ndt_stats, read-only */ NDTA_GC_INTERVAL, /* u64, msecs */ NDTA_PAD, __NDTA_MAX }; #define NDTA_MAX (__NDTA_MAX - 1) /* FDB activity notification bits used in NFEA_ACTIVITY_NOTIFY: * - FDB_NOTIFY_BIT - notify on activity/expire for any entry * - FDB_NOTIFY_INACTIVE_BIT - mark as inactive to avoid multiple notifications */ enum { FDB_NOTIFY_BIT = (1 << 0), FDB_NOTIFY_INACTIVE_BIT = (1 << 1) }; /* embedded into NDA_FDB_EXT_ATTRS: * [NDA_FDB_EXT_ATTRS] = { * [NFEA_ACTIVITY_NOTIFY] * ... * } */ enum { NFEA_UNSPEC, NFEA_ACTIVITY_NOTIFY, NFEA_DONT_REFRESH, __NFEA_MAX }; #define NFEA_MAX (__NFEA_MAX - 1) #endif
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