1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef __LINUX_NEIGHBOUR_H 3 #define __LINUX_NEIGHBOUR_H 4 5 #include <linux/types.h> 6 #include <linux/netlink.h> 7 8 struct ndmsg { 9 __u8 ndm_family; 10 __u8 ndm_pad1; 11 __u16 ndm_pad2; 12 __s32 ndm_ifindex; 13 __u16 ndm_state; 14 __u8 ndm_flags; 15 __u8 ndm_type; 16 }; 17 18 enum { 19 NDA_UNSPEC, 20 NDA_DST, 21 NDA_LLADDR, 22 NDA_CACHEINFO, 23 NDA_PROBES, 24 NDA_VLAN, 25 NDA_PORT, 26 NDA_VNI, 27 NDA_IFINDEX, 28 NDA_MASTER, 29 NDA_LINK_NETNSID, 30 NDA_SRC_VNI, 31 NDA_PROTOCOL, /* Originator of entry */ 32 NDA_NH_ID, 33 NDA_FDB_EXT_ATTRS, 34 __NDA_MAX 35 }; 36 37 #define NDA_MAX (__NDA_MAX - 1) 38 39 /* 40 * Neighbor Cache Entry Flags 41 */ 42 43 #define NTF_USE 0x01 44 #define NTF_SELF 0x02 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 51 52 /* 53 * Neighbor Cache Entry States. 54 */ 55 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 62 63 /* Dummy states */ 64 #define NUD_NOARP 0x40 65 #define NUD_PERMANENT 0x80 66 #define NUD_NONE 0x00 67 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. 71 * When NTF_EXT_LEARNED is set for a bridge fdb entry the different cache entry 72 * states don't make sense and thus are ignored. Such entries don't age and 73 * can roam. 74 */ 75 76 struct nda_cacheinfo { 77 __u32 ndm_confirmed; 78 __u32 ndm_used; 79 __u32 ndm_updated; 80 __u32 ndm_refcnt; 81 }; 82 83 /***************************************************************** 84 * Neighbour tables specific messages. 85 * 86 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the 87 * NLM_F_DUMP flag set. Every neighbour table configuration is 88 * spread over multiple messages to avoid running into message 89 * size limits on systems with many interfaces. The first message 90 * in the sequence transports all not device specific data such as 91 * statistics, configuration, and the default parameter set. 92 * This message is followed by 0..n messages carrying device 93 * specific parameter sets. 94 * Although the ordering should be sufficient, NDTA_NAME can be 95 * used to identify sequences. The initial message can be identified 96 * by checking for NDTA_CONFIG. The device specific messages do 97 * not contain this TLV but have NDTPA_IFINDEX set to the 98 * corresponding interface index. 99 * 100 * To change neighbour table attributes, send RTM_SETNEIGHTBL 101 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3], 102 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked 103 * otherwise. Device specific parameter sets can be changed by 104 * setting NDTPA_IFINDEX to the interface index of the corresponding 105 * device. 106 ****/ 107 108 struct ndt_stats { 109 __u64 ndts_allocs; 110 __u64 ndts_destroys; 111 __u64 ndts_hash_grows; 112 __u64 ndts_res_failed; 113 __u64 ndts_lookups; 114 __u64 ndts_hits; 115 __u64 ndts_rcv_probes_mcast; 116 __u64 ndts_rcv_probes_ucast; 117 __u64 ndts_periodic_gc_runs; 118 __u64 ndts_forced_gc_runs; 119 __u64 ndts_table_fulls; 120 }; 121 122 enum { 123 NDTPA_UNSPEC, 124 NDTPA_IFINDEX, /* u32, unchangeable */ 125 NDTPA_REFCNT, /* u32, read-only */ 126 NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */ 127 NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */ 128 NDTPA_RETRANS_TIME, /* u64, msecs */ 129 NDTPA_GC_STALETIME, /* u64, msecs */ 130 NDTPA_DELAY_PROBE_TIME, /* u64, msecs */ 131 NDTPA_QUEUE_LEN, /* u32 */ 132 NDTPA_APP_PROBES, /* u32 */ 133 NDTPA_UCAST_PROBES, /* u32 */ 134 NDTPA_MCAST_PROBES, /* u32 */ 135 NDTPA_ANYCAST_DELAY, /* u64, msecs */ 136 NDTPA_PROXY_DELAY, /* u64, msecs */ 137 NDTPA_PROXY_QLEN, /* u32 */ 138 NDTPA_LOCKTIME, /* u64, msecs */ 139 NDTPA_QUEUE_LENBYTES, /* u32 */ 140 NDTPA_MCAST_REPROBES, /* u32 */ 141 NDTPA_PAD, 142 __NDTPA_MAX 143 }; 144 #define NDTPA_MAX (__NDTPA_MAX - 1) 145 146 struct ndtmsg { 147 __u8 ndtm_family; 148 __u8 ndtm_pad1; 149 __u16 ndtm_pad2; 150 }; 151 152 struct ndt_config { 153 __u16 ndtc_key_len; 154 __u16 ndtc_entry_size; 155 __u32 ndtc_entries; 156 __u32 ndtc_last_flush; /* delta to now in msecs */ 157 __u32 ndtc_last_rand; /* delta to now in msecs */ 158 __u32 ndtc_hash_rnd; 159 __u32 ndtc_hash_mask; 160 __u32 ndtc_hash_chain_gc; 161 __u32 ndtc_proxy_qlen; 162 }; 163 164 enum { 165 NDTA_UNSPEC, 166 NDTA_NAME, /* char *, unchangeable */ 167 NDTA_THRESH1, /* u32 */ 168 NDTA_THRESH2, /* u32 */ 169 NDTA_THRESH3, /* u32 */ 170 NDTA_CONFIG, /* struct ndt_config, read-only */ 171 NDTA_PARMS, /* nested TLV NDTPA_* */ 172 NDTA_STATS, /* struct ndt_stats, read-only */ 173 NDTA_GC_INTERVAL, /* u64, msecs */ 174 NDTA_PAD, 175 __NDTA_MAX 176 }; 177 #define NDTA_MAX (__NDTA_MAX - 1) 178 179 /* FDB activity notification bits used in NFEA_ACTIVITY_NOTIFY: 180 * - FDB_NOTIFY_BIT - notify on activity/expire for any entry 181 * - FDB_NOTIFY_INACTIVE_BIT - mark as inactive to avoid multiple notifications 182 */ 183 enum { 184 FDB_NOTIFY_BIT = (1 << 0), 185 FDB_NOTIFY_INACTIVE_BIT = (1 << 1) 186 }; 187 188 /* embedded into NDA_FDB_EXT_ATTRS: 189 * [NDA_FDB_EXT_ATTRS] = { 190 * [NFEA_ACTIVITY_NOTIFY] 191 * ... 192 * } 193 */ 194 enum { 195 NFEA_UNSPEC, 196 NFEA_ACTIVITY_NOTIFY, 197 NFEA_DONT_REFRESH, 198 __NFEA_MAX 199 }; 200 #define NFEA_MAX (__NFEA_MAX - 1) 201 202 #endif 203