1 /* $OpenBSD: nd6.h,v 1.77 2022/07/22 15:34:46 kn Exp $ */ 2 /* $KAME: nd6.h,v 1.95 2002/06/08 11:31:06 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef _NETINET6_ND6_H_ 34 #define _NETINET6_ND6_H_ 35 36 #include <sys/task.h> 37 38 #define ND6_LLINFO_PURGE -3 39 #define ND6_LLINFO_NOSTATE -2 40 #define ND6_LLINFO_INCOMPLETE 0 41 #define ND6_LLINFO_REACHABLE 1 42 #define ND6_LLINFO_STALE 2 43 #define ND6_LLINFO_DELAY 3 44 #define ND6_LLINFO_PROBE 4 45 46 struct nd_ifinfo { 47 u_int32_t basereachable; /* BaseReachableTime */ 48 u_int32_t reachable; /* Reachable Time */ 49 u_int32_t retrans; /* Retrans Timer */ 50 int recalctm; /* BaseReacable re-calculation timer */ 51 u_int8_t initialized; /* Flag to see the entry is initialized */ 52 }; 53 54 struct in6_nbrinfo { 55 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 56 struct in6_addr addr; /* IPv6 address of the neighbor */ 57 time_t expire; /* lifetime for NDP state transition */ 58 long asked; /* number of queries already sent for addr */ 59 int isrouter; /* if it acts as a router */ 60 int state; /* reachability state */ 61 }; 62 63 struct prf_ra { 64 u_int onlink : 1; 65 u_int autonomous : 1; 66 u_int router : 1; 67 u_int reserved : 5; 68 }; 69 70 struct in6_ndireq { 71 char ifname[IFNAMSIZ]; 72 struct nd_ifinfo ndi; 73 }; 74 75 struct in6_ndifreq { 76 char ifname[IFNAMSIZ]; 77 u_long ifindex; 78 }; 79 80 /* Prefix status */ 81 #define NDPRF_ONLINK 0x1 82 #define NDPRF_DETACHED 0x2 83 #define NDPRF_HOME 0x4 84 85 /* protocol constants */ 86 #define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/ 87 #define RTR_SOLICITATION_INTERVAL 4 /*4sec*/ 88 #define MAX_RTR_SOLICITATIONS 3 89 90 #define ND6_INFINITE_LIFETIME 0xffffffff 91 92 #ifdef _KERNEL 93 94 #include <sys/queue.h> 95 96 #define ND_IFINFO(ifp) \ 97 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 98 99 #define RS_LHCOOKIE(ifp) \ 100 ((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->rs_lhcookie 101 102 struct llinfo_nd6 { 103 TAILQ_ENTRY(llinfo_nd6) ln_list; 104 struct rtentry *ln_rt; 105 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 106 long ln_asked; /* number of queries already sent for addr */ 107 int ln_byhint; /* # of times we made it reachable by UL hint */ 108 short ln_state; /* reachability state */ 109 short ln_router; /* 2^0: ND6 router bit */ 110 }; 111 112 #define ND6_LLINFO_PERMANENT(n) ((n)->ln_rt->rt_expire == 0) 113 114 /* node constants */ 115 #define REACHABLE_TIME 30000 /* msec */ 116 #define RETRANS_TIMER 1000 /* msec */ 117 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 118 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 119 #define ND_COMPUTE_RTIME(x) \ 120 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ 121 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 122 123 extern int nd6_delay; 124 extern int nd6_umaxtries; 125 extern int nd6_mmaxtries; 126 extern int nd6_maxnudhint; 127 extern int nd6_gctimer; 128 extern int nd6_debug; 129 130 #define nd6log(x) do { if (nd6_debug) log x; } while (0) 131 132 union nd_opts { 133 struct nd_opt_hdr *nd_opt_array[9]; 134 struct { 135 struct nd_opt_hdr *zero; 136 struct nd_opt_hdr *src_lladdr; 137 struct nd_opt_hdr *tgt_lladdr; 138 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 139 struct nd_opt_rd_hdr *rh; 140 struct nd_opt_mtu *mtu; 141 struct nd_opt_hdr *search; /* multiple opts */ 142 struct nd_opt_hdr *last; /* multiple opts */ 143 int done; 144 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 145 } nd_opt_each; 146 }; 147 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 148 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 149 #define nd_opts_pi nd_opt_each.pi_beg 150 #define nd_opts_pi_end nd_opt_each.pi_end 151 #define nd_opts_rh nd_opt_each.rh 152 #define nd_opts_mtu nd_opt_each.mtu 153 #define nd_opts_search nd_opt_each.search 154 #define nd_opts_last nd_opt_each.last 155 #define nd_opts_done nd_opt_each.done 156 157 void nd6_init(void); 158 struct nd_ifinfo *nd6_ifattach(struct ifnet *); 159 void nd6_ifdetach(struct nd_ifinfo *); 160 int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *); 161 void nd6_option_init(void *, int, union nd_opts *); 162 struct nd_opt_hdr *nd6_option(union nd_opts *); 163 int nd6_options(union nd_opts *); 164 struct rtentry *nd6_lookup(struct in6_addr *, int, struct ifnet *, u_int); 165 void nd6_setmtu(struct ifnet *); 166 void nd6_llinfo_settimer(struct llinfo_nd6 *, unsigned int); 167 void nd6_purge(struct ifnet *); 168 void nd6_nud_hint(struct rtentry *); 169 void nd6_rtrequest(struct ifnet *, int, struct rtentry *); 170 int nd6_ioctl(u_long, caddr_t, struct ifnet *); 171 void nd6_cache_lladdr(struct ifnet *, struct in6_addr *, char *, int, int, int); 172 int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *, 173 struct sockaddr *, u_char *); 174 int nd6_need_cache(struct ifnet *); 175 176 void nd6_na_input(struct mbuf *, int, int); 177 void nd6_na_output(struct ifnet *, struct in6_addr *, 178 struct in6_addr *, u_long, int, struct sockaddr *); 179 void nd6_ns_input(struct mbuf *, int, int); 180 void nd6_ns_output(struct ifnet *, struct in6_addr *, 181 struct in6_addr *, struct llinfo_nd6 *, int); 182 caddr_t nd6_ifptomac(struct ifnet *); 183 void nd6_dad_start(struct ifaddr *); 184 void nd6_dad_stop(struct ifaddr *); 185 186 void nd6_rtr_cache(struct mbuf *, int, int, int); 187 188 int in6_ifdel(struct ifnet *, struct in6_addr *); 189 int rt6_flush(struct in6_addr *, struct ifnet *); 190 191 void nd6_expire_timer_update(struct in6_ifaddr *); 192 #endif /* _KERNEL */ 193 194 #endif /* _NETINET6_ND6_H_ */ 195