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_MAX 33 }; 34 35 #define NDA_MAX (__NDA_MAX - 1) 36 37 /* 38 * Neighbor Cache Entry Flags 39 */ 40 41 #define NTF_USE 0x01 42 #define NTF_SELF 0x02 43 #define NTF_MASTER 0x04 44 #define NTF_PROXY 0x08 /* == ATF_PUBL */ 45 #define NTF_EXT_LEARNED 0x10 46 #define NTF_OFFLOADED 0x20 47 #define NTF_STICKY 0x40 48 #define NTF_ROUTER 0x80 49 50 /* 51 * Neighbor Cache Entry States. 52 */ 53 54 #define NUD_INCOMPLETE 0x01 55 #define NUD_REACHABLE 0x02 56 #define NUD_STALE 0x04 57 #define NUD_DELAY 0x08 58 #define NUD_PROBE 0x10 59 #define NUD_FAILED 0x20 60 61 /* Dummy states */ 62 #define NUD_NOARP 0x40 63 #define NUD_PERMANENT 0x80 64 #define NUD_NONE 0x00 65 66 /* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change 67 and make no address resolution or NUD. 68 NUD_PERMANENT also cannot be deleted by garbage collectors. 69 */ 70 71 struct nda_cacheinfo { 72 __u32 ndm_confirmed; 73 __u32 ndm_used; 74 __u32 ndm_updated; 75 __u32 ndm_refcnt; 76 }; 77 78 /***************************************************************** 79 * Neighbour tables specific messages. 80 * 81 * To retrieve the neighbour tables send RTM_GETNEIGHTBL with the 82 * NLM_F_DUMP flag set. Every neighbour table configuration is 83 * spread over multiple messages to avoid running into message 84 * size limits on systems with many interfaces. The first message 85 * in the sequence transports all not device specific data such as 86 * statistics, configuration, and the default parameter set. 87 * This message is followed by 0..n messages carrying device 88 * specific parameter sets. 89 * Although the ordering should be sufficient, NDTA_NAME can be 90 * used to identify sequences. The initial message can be identified 91 * by checking for NDTA_CONFIG. The device specific messages do 92 * not contain this TLV but have NDTPA_IFINDEX set to the 93 * corresponding interface index. 94 * 95 * To change neighbour table attributes, send RTM_SETNEIGHTBL 96 * with NDTA_NAME set. Changeable attribute include NDTA_THRESH[1-3], 97 * NDTA_GC_INTERVAL, and all TLVs in NDTA_PARMS unless marked 98 * otherwise. Device specific parameter sets can be changed by 99 * setting NDTPA_IFINDEX to the interface index of the corresponding 100 * device. 101 ****/ 102 103 struct ndt_stats { 104 __u64 ndts_allocs; 105 __u64 ndts_destroys; 106 __u64 ndts_hash_grows; 107 __u64 ndts_res_failed; 108 __u64 ndts_lookups; 109 __u64 ndts_hits; 110 __u64 ndts_rcv_probes_mcast; 111 __u64 ndts_rcv_probes_ucast; 112 __u64 ndts_periodic_gc_runs; 113 __u64 ndts_forced_gc_runs; 114 __u64 ndts_table_fulls; 115 }; 116 117 enum { 118 NDTPA_UNSPEC, 119 NDTPA_IFINDEX, /* u32, unchangeable */ 120 NDTPA_REFCNT, /* u32, read-only */ 121 NDTPA_REACHABLE_TIME, /* u64, read-only, msecs */ 122 NDTPA_BASE_REACHABLE_TIME, /* u64, msecs */ 123 NDTPA_RETRANS_TIME, /* u64, msecs */ 124 NDTPA_GC_STALETIME, /* u64, msecs */ 125 NDTPA_DELAY_PROBE_TIME, /* u64, msecs */ 126 NDTPA_QUEUE_LEN, /* u32 */ 127 NDTPA_APP_PROBES, /* u32 */ 128 NDTPA_UCAST_PROBES, /* u32 */ 129 NDTPA_MCAST_PROBES, /* u32 */ 130 NDTPA_ANYCAST_DELAY, /* u64, msecs */ 131 NDTPA_PROXY_DELAY, /* u64, msecs */ 132 NDTPA_PROXY_QLEN, /* u32 */ 133 NDTPA_LOCKTIME, /* u64, msecs */ 134 NDTPA_QUEUE_LENBYTES, /* u32 */ 135 NDTPA_MCAST_REPROBES, /* u32 */ 136 NDTPA_PAD, 137 __NDTPA_MAX 138 }; 139 #define NDTPA_MAX (__NDTPA_MAX - 1) 140 141 struct ndtmsg { 142 __u8 ndtm_family; 143 __u8 ndtm_pad1; 144 __u16 ndtm_pad2; 145 }; 146 147 struct ndt_config { 148 __u16 ndtc_key_len; 149 __u16 ndtc_entry_size; 150 __u32 ndtc_entries; 151 __u32 ndtc_last_flush; /* delta to now in msecs */ 152 __u32 ndtc_last_rand; /* delta to now in msecs */ 153 __u32 ndtc_hash_rnd; 154 __u32 ndtc_hash_mask; 155 __u32 ndtc_hash_chain_gc; 156 __u32 ndtc_proxy_qlen; 157 }; 158 159 enum { 160 NDTA_UNSPEC, 161 NDTA_NAME, /* char *, unchangeable */ 162 NDTA_THRESH1, /* u32 */ 163 NDTA_THRESH2, /* u32 */ 164 NDTA_THRESH3, /* u32 */ 165 NDTA_CONFIG, /* struct ndt_config, read-only */ 166 NDTA_PARMS, /* nested TLV NDTPA_* */ 167 NDTA_STATS, /* struct ndt_stats, read-only */ 168 NDTA_GC_INTERVAL, /* u64, msecs */ 169 NDTA_PAD, 170 __NDTA_MAX 171 }; 172 #define NDTA_MAX (__NDTA_MAX - 1) 173 174 #endif 175