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_MAX 32 }; 33 34 #define NDA_MAX (__NDA_MAX - 1) 35 36 /* 37 * Neighbor Cache Entry Flags 38 */ 39 40 #define NTF_USE 0x01 41 #define NTF_SELF 0x02 42 #define NTF_MASTER 0x04 43 #define NTF_PROXY 0x08 /* == ATF_PUBL */ 44 #define NTF_EXT_LEARNED 0x10 45 #define NTF_OFFLOADED 0x20 46 #define NTF_ROUTER 0x80 47 48 /* 49 * Neighbor Cache Entry States. 50 */ 51 52 #define NUD_INCOMPLETE 0x01 53 #define NUD_REACHABLE 0x02 54 #define NUD_STALE 0x04 55 #define NUD_DELAY 0x08 56 #define NUD_PROBE 0x10 57 #define NUD_FAILED 0x20 58 59 /* Dummy states */ 60 #define NUD_NOARP 0x40 61 #define NUD_PERMANENT 0x80 62 #define NUD_NONE 0x00 63 64 /* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change 65 and make no address resolution or NUD. 66 NUD_PERMANENT also cannot be deleted by garbage collectors. 67 */ 68 69 struct nda_cacheinfo { 70 __u32 ndm_confirmed; 71 __u32 ndm_used; 72 __u32 ndm_updated; 73 __u32 ndm_refcnt; 74 }; 75 76 /***************************************************************** 77 * Neighbour tables specific messages. 78 * 79 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the 80 * NLM_F_DUMP flag set. Every neighbour table configuration is 81 * spread over multiple messages to avoid running into message 82 * size limits on systems with many interfaces. The first message 83 * in the sequence transports all not device specific data such as 84 * statistics, configuration, and the default parameter set. 85 * This message is followed by 0..n messages carrying device 86 * specific parameter sets. 87 * Although the ordering should be sufficient, NDTA_NAME can be 88 * used to identify sequences. The initial message can be identified 89 * by checking for NDTA_CONFIG. The device specific messages do 90 * not contain this TLV but have NDTPA_IFINDEX set to the 91 * corresponding interface index. 92 * 93 * To change neighbour table attributes, send RTM_SETNEIGHTBL 94 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3], 95 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked 96 * otherwise. Device specific parameter sets can be changed by 97 * setting NDTPA_IFINDEX to the interface index of the corresponding 98 * device. 99 ****/ 100 101 struct ndt_stats { 102 __u64 ndts_allocs; 103 __u64 ndts_destroys; 104 __u64 ndts_hash_grows; 105 __u64 ndts_res_failed; 106 __u64 ndts_lookups; 107 __u64 ndts_hits; 108 __u64 ndts_rcv_probes_mcast; 109 __u64 ndts_rcv_probes_ucast; 110 __u64 ndts_periodic_gc_runs; 111 __u64 ndts_forced_gc_runs; 112 __u64 ndts_table_fulls; 113 }; 114 115 enum { 116 NDTPA_UNSPEC, 117 NDTPA_IFINDEX, /* u32, unchangeable */ 118 NDTPA_REFCNT, /* u32, read-only */ 119 NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */ 120 NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */ 121 NDTPA_RETRANS_TIME, /* u64, msecs */ 122 NDTPA_GC_STALETIME, /* u64, msecs */ 123 NDTPA_DELAY_PROBE_TIME, /* u64, msecs */ 124 NDTPA_QUEUE_LEN, /* u32 */ 125 NDTPA_APP_PROBES, /* u32 */ 126 NDTPA_UCAST_PROBES, /* u32 */ 127 NDTPA_MCAST_PROBES, /* u32 */ 128 NDTPA_ANYCAST_DELAY, /* u64, msecs */ 129 NDTPA_PROXY_DELAY, /* u64, msecs */ 130 NDTPA_PROXY_QLEN, /* u32 */ 131 NDTPA_LOCKTIME, /* u64, msecs */ 132 NDTPA_QUEUE_LENBYTES, /* u32 */ 133 NDTPA_MCAST_REPROBES, /* u32 */ 134 NDTPA_PAD, 135 __NDTPA_MAX 136 }; 137 #define NDTPA_MAX (__NDTPA_MAX - 1) 138 139 struct ndtmsg { 140 __u8 ndtm_family; 141 __u8 ndtm_pad1; 142 __u16 ndtm_pad2; 143 }; 144 145 struct ndt_config { 146 __u16 ndtc_key_len; 147 __u16 ndtc_entry_size; 148 __u32 ndtc_entries; 149 __u32 ndtc_last_flush; /* delta to now in msecs */ 150 __u32 ndtc_last_rand; /* delta to now in msecs */ 151 __u32 ndtc_hash_rnd; 152 __u32 ndtc_hash_mask; 153 __u32 ndtc_hash_chain_gc; 154 __u32 ndtc_proxy_qlen; 155 }; 156 157 enum { 158 NDTA_UNSPEC, 159 NDTA_NAME, /* char *, unchangeable */ 160 NDTA_THRESH1, /* u32 */ 161 NDTA_THRESH2, /* u32 */ 162 NDTA_THRESH3, /* u32 */ 163 NDTA_CONFIG, /* struct ndt_config, read-only */ 164 NDTA_PARMS, /* nested TLV NDTPA_* */ 165 NDTA_STATS, /* struct ndt_stats, read-only */ 166 NDTA_GC_INTERVAL, /* u64, msecs */ 167 NDTA_PAD, 168 __NDTA_MAX 169 }; 170 #define NDTA_MAX (__NDTA_MAX - 1) 171 172 #endif 173