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 */ 72 73 struct nda_cacheinfo { 74 __u32 ndm_confirmed; 75 __u32 ndm_used; 76 __u32 ndm_updated; 77 __u32 ndm_refcnt; 78 }; 79 80 /***************************************************************** 81 * Neighbour tables specific messages. 82 * 83 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the 84 * NLM_F_DUMP flag set. Every neighbour table configuration is 85 * spread over multiple messages to avoid running into message 86 * size limits on systems with many interfaces. The first message 87 * in the sequence transports all not device specific data such as 88 * statistics, configuration, and the default parameter set. 89 * This message is followed by 0..n messages carrying device 90 * specific parameter sets. 91 * Although the ordering should be sufficient, NDTA_NAME can be 92 * used to identify sequences. The initial message can be identified 93 * by checking for NDTA_CONFIG. The device specific messages do 94 * not contain this TLV but have NDTPA_IFINDEX set to the 95 * corresponding interface index. 96 * 97 * To change neighbour table attributes, send RTM_SETNEIGHTBL 98 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3], 99 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked 100 * otherwise. Device specific parameter sets can be changed by 101 * setting NDTPA_IFINDEX to the interface index of the corresponding 102 * device. 103 ****/ 104 105 struct ndt_stats { 106 __u64 ndts_allocs; 107 __u64 ndts_destroys; 108 __u64 ndts_hash_grows; 109 __u64 ndts_res_failed; 110 __u64 ndts_lookups; 111 __u64 ndts_hits; 112 __u64 ndts_rcv_probes_mcast; 113 __u64 ndts_rcv_probes_ucast; 114 __u64 ndts_periodic_gc_runs; 115 __u64 ndts_forced_gc_runs; 116 __u64 ndts_table_fulls; 117 }; 118 119 enum { 120 NDTPA_UNSPEC, 121 NDTPA_IFINDEX, /* u32, unchangeable */ 122 NDTPA_REFCNT, /* u32, read-only */ 123 NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */ 124 NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */ 125 NDTPA_RETRANS_TIME, /* u64, msecs */ 126 NDTPA_GC_STALETIME, /* u64, msecs */ 127 NDTPA_DELAY_PROBE_TIME, /* u64, msecs */ 128 NDTPA_QUEUE_LEN, /* u32 */ 129 NDTPA_APP_PROBES, /* u32 */ 130 NDTPA_UCAST_PROBES, /* u32 */ 131 NDTPA_MCAST_PROBES, /* u32 */ 132 NDTPA_ANYCAST_DELAY, /* u64, msecs */ 133 NDTPA_PROXY_DELAY, /* u64, msecs */ 134 NDTPA_PROXY_QLEN, /* u32 */ 135 NDTPA_LOCKTIME, /* u64, msecs */ 136 NDTPA_QUEUE_LENBYTES, /* u32 */ 137 NDTPA_MCAST_REPROBES, /* u32 */ 138 NDTPA_PAD, 139 __NDTPA_MAX 140 }; 141 #define NDTPA_MAX (__NDTPA_MAX - 1) 142 143 struct ndtmsg { 144 __u8 ndtm_family; 145 __u8 ndtm_pad1; 146 __u16 ndtm_pad2; 147 }; 148 149 struct ndt_config { 150 __u16 ndtc_key_len; 151 __u16 ndtc_entry_size; 152 __u32 ndtc_entries; 153 __u32 ndtc_last_flush; /* delta to now in msecs */ 154 __u32 ndtc_last_rand; /* delta to now in msecs */ 155 __u32 ndtc_hash_rnd; 156 __u32 ndtc_hash_mask; 157 __u32 ndtc_hash_chain_gc; 158 __u32 ndtc_proxy_qlen; 159 }; 160 161 enum { 162 NDTA_UNSPEC, 163 NDTA_NAME, /* char *, unchangeable */ 164 NDTA_THRESH1, /* u32 */ 165 NDTA_THRESH2, /* u32 */ 166 NDTA_THRESH3, /* u32 */ 167 NDTA_CONFIG, /* struct ndt_config, read-only */ 168 NDTA_PARMS, /* nested TLV NDTPA_* */ 169 NDTA_STATS, /* struct ndt_stats, read-only */ 170 NDTA_GC_INTERVAL, /* u64, msecs */ 171 NDTA_PAD, 172 __NDTA_MAX 173 }; 174 #define NDTA_MAX (__NDTA_MAX - 1) 175 176 /* FDB activity notification bits used in NFEA_ACTIVITY_NOTIFY: 177 * - FDB_NOTIFY_BIT - notify on activity/expire for any entry 178 * - FDB_NOTIFY_INACTIVE_BIT - mark as inactive to avoid multiple notifications 179 */ 180 enum { 181 FDB_NOTIFY_BIT = (1 << 0), 182 FDB_NOTIFY_INACTIVE_BIT = (1 << 1) 183 }; 184 185 /* embedded into NDA_FDB_EXT_ATTRS: 186 * [NDA_FDB_EXT_ATTRS] = { 187 * [NFEA_ACTIVITY_NOTIFY] 188 * ... 189 * } 190 */ 191 enum { 192 NFEA_UNSPEC, 193 NFEA_ACTIVITY_NOTIFY, 194 NFEA_DONT_REFRESH, 195 __NFEA_MAX 196 }; 197 #define NFEA_MAX (__NFEA_MAX - 1) 198 199 #endif 200