1 /* $NetBSD: nd6.h,v 1.91 2020/09/11 15:03:33 roy 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/queue.h> 37 #include <sys/callout.h> 38 39 #ifndef _KERNEL 40 /* Backwards compat */ 41 #include <net/nd.h> 42 #define ND6_LLINFO_PURGE ND_LLINFO_PURGE 43 #define ND6_LLINFO_NOSTATE ND_LLINFO_NOSTATE 44 #define ND6_LLINFO_WAITDELETE ND_LLINFO_WAITDELETE 45 #define ND6_LLINFO_INCOMPLETE ND_LLINFO_INCOMPLETE 46 #define ND6_LLINFO_REACHABLE ND_LLINFO_REACHABLE 47 #define ND6_LLINFO_STALE ND_LLINFO_STALE 48 #define ND6_LLINFO_DELAY ND_LLINFO_DELAY 49 #define ND6_LLINFO_PROBE ND_LLINFO_PROBE 50 #endif 51 52 struct nd_ifinfo { 53 uint8_t chlim; /* CurHopLimit */ 54 uint32_t basereachable; /* BaseReachableTime */ 55 uint32_t retrans; /* Retrans Timer */ 56 uint32_t flags; /* Flags */ 57 }; 58 #ifdef _KERNEL 59 struct nd_kifinfo { 60 uint8_t chlim; /* CurHopLimit */ 61 uint32_t basereachable; /* BaseReachableTime */ 62 uint32_t retrans; /* Retrans Timer */ 63 uint32_t flags; /* Flags */ 64 int recalctm; /* BaseReacable re-calculation timer */ 65 uint32_t reachable; /* Reachable Time */ 66 }; 67 #endif 68 69 #define ND6_IFF_PERFORMNUD 0x01 70 /* 0x02 was ND6_IFF_ACCEPT_RTADV */ 71 #define ND6_IFF_PREFER_SOURCE 0x04 /* XXX: not related to ND. */ 72 #define ND6_IFF_IFDISABLED 0x08 /* IPv6 operation is disabled due to 73 * DAD failure. (XXX: not ND-specific) 74 */ 75 /* 0x10 was ND6_IFF_OVERRIDE_RTADV */ 76 #define ND6_IFF_AUTO_LINKLOCAL 0x20 77 78 #ifdef _KERNEL 79 #define ND_IFINFO(ifp) \ 80 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 81 #endif 82 83 struct in6_nbrinfo { 84 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 85 struct in6_addr addr; /* IPv6 address of the neighbor */ 86 long asked; /* number of queries already sent for this addr */ 87 int isrouter; /* if it acts as a router */ 88 int state; /* reachability state */ 89 int expire; /* lifetime for NDP state transition */ 90 }; 91 92 struct in6_ndireq { 93 char ifname[IFNAMSIZ]; 94 struct nd_ifinfo ndi; 95 }; 96 97 /* protocol constants */ 98 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 99 #define ND6_INFINITE_LIFETIME ((u_int32_t)~0) 100 101 #ifdef _KERNEL 102 #include <sys/mallocvar.h> 103 MALLOC_DECLARE(M_IP6NDP); 104 105 /* nd6.c */ 106 extern int nd6_prune; 107 extern int nd6_useloopback; 108 extern int nd6_debug; 109 110 extern struct nd_domain nd6_nd_domain; 111 112 #define nd6log(level, fmt, args...) \ 113 do { if (nd6_debug) log(level, "%s: " fmt, __func__, ##args);} while (0) 114 115 extern krwlock_t nd6_lock; 116 117 #define ND6_RLOCK() rw_enter(&nd6_lock, RW_READER) 118 #define ND6_WLOCK() rw_enter(&nd6_lock, RW_WRITER) 119 #define ND6_UNLOCK() rw_exit(&nd6_lock) 120 #define ND6_ASSERT_WLOCK() KASSERT(rw_write_held(&nd6_lock)) 121 #define ND6_ASSERT_LOCK() KASSERT(rw_lock_held(&nd6_lock)) 122 123 union nd_opts { 124 struct nd_opt_hdr *nd_opt_array[16]; /* max = ND_OPT_NONCE */ 125 struct { 126 struct nd_opt_hdr *zero; 127 struct nd_opt_hdr *src_lladdr; 128 struct nd_opt_hdr *tgt_lladdr; 129 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 130 struct nd_opt_rd_hdr *rh; 131 struct nd_opt_mtu *mtu; 132 struct nd_opt_hdr *__res6; 133 struct nd_opt_hdr *__res7; 134 struct nd_opt_hdr *__res8; 135 struct nd_opt_hdr *__res9; 136 struct nd_opt_hdr *__res10; 137 struct nd_opt_hdr *__res11; 138 struct nd_opt_hdr *__res12; 139 struct nd_opt_hdr *__res13; 140 struct nd_opt_nonce *nonce; 141 struct nd_opt_hdr *__res15; 142 struct nd_opt_hdr *search; /* multiple opts */ 143 struct nd_opt_hdr *last; /* multiple opts */ 144 int done; 145 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 146 } nd_opt_each; 147 }; 148 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 149 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 150 #define nd_opts_pi nd_opt_each.pi_beg 151 #define nd_opts_pi_end nd_opt_each.pi_end 152 #define nd_opts_rh nd_opt_each.rh 153 #define nd_opts_mtu nd_opt_each.mtu 154 #define nd_opts_nonce nd_opt_each.nonce 155 #define nd_opts_search nd_opt_each.search 156 #define nd_opts_last nd_opt_each.last 157 #define nd_opts_done nd_opt_each.done 158 159 #include <net/if_llatbl.h> 160 161 /* XXX: need nd6_var.h?? */ 162 /* nd6.c */ 163 void nd6_init(void); 164 void nd6_nbr_init(void); 165 struct nd_kifinfo *nd6_ifattach(struct ifnet *); 166 void nd6_ifdetach(struct ifnet *, struct in6_ifextra *); 167 int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *); 168 void nd6_option_init(void *, int, union nd_opts *); 169 int nd6_options(union nd_opts *); 170 struct llentry *nd6_lookup(const struct in6_addr *, const struct ifnet *, bool); 171 struct llentry *nd6_create(const struct in6_addr *, const struct ifnet *); 172 void nd6_purge(struct ifnet *, struct in6_ifextra *); 173 void nd6_nud_hint(struct rtentry *); 174 int nd6_resolve(struct ifnet *, const struct rtentry *, struct mbuf *, 175 const struct sockaddr *, uint8_t *, size_t); 176 void nd6_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 177 int nd6_ioctl(u_long, void *, struct ifnet *); 178 void nd6_cache_lladdr(struct ifnet *, struct in6_addr *, 179 char *, int, int, int); 180 int nd6_sysctl(int, void *, size_t *, void *, size_t); 181 int nd6_need_cache(struct ifnet *); 182 void nd6_llinfo_release_pkts(struct llentry *, struct ifnet *); 183 184 /* nd6_nbr.c */ 185 void nd6_na_input(struct mbuf *, int, int); 186 void nd6_na_output(struct ifnet *, const struct in6_addr *, 187 const struct in6_addr *, u_long, int, const struct sockaddr *); 188 void nd6_ns_input(struct mbuf *, int, int); 189 void nd6_ns_output(struct ifnet *, const struct in6_addr *, 190 const struct in6_addr *, const struct in6_addr *, const uint8_t *); 191 const void *nd6_ifptomac(const struct ifnet *); 192 void nd6_dad_start(struct ifaddr *, int); 193 void nd6_dad_stop(struct ifaddr *); 194 195 /* nd6_rtr.c */ 196 void nd6_rtr_cache(struct mbuf *, int, int, int); 197 198 #endif /* _KERNEL */ 199 200 #endif /* !_NETINET6_ND6_H_ */ 201