nd6.h revision 1.2
1 1.2 itojun /* 2 1.2 itojun * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 1.2 itojun * All rights reserved. 4 1.2 itojun * 5 1.2 itojun * Redistribution and use in source and binary forms, with or without 6 1.2 itojun * modification, are permitted provided that the following conditions 7 1.2 itojun * are met: 8 1.2 itojun * 1. Redistributions of source code must retain the above copyright 9 1.2 itojun * notice, this list of conditions and the following disclaimer. 10 1.2 itojun * 2. Redistributions in binary form must reproduce the above copyright 11 1.2 itojun * notice, this list of conditions and the following disclaimer in the 12 1.2 itojun * documentation and/or other materials provided with the distribution. 13 1.2 itojun * 3. Neither the name of the project nor the names of its contributors 14 1.2 itojun * may be used to endorse or promote products derived from this software 15 1.2 itojun * without specific prior written permission. 16 1.2 itojun * 17 1.2 itojun * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 1.2 itojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 1.2 itojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 1.2 itojun * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 1.2 itojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 1.2 itojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 1.2 itojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 1.2 itojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 1.2 itojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 1.2 itojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 1.2 itojun * SUCH DAMAGE. 28 1.2 itojun */ 29 1.2 itojun 30 1.2 itojun #ifndef _NETINET6_ND6_H_ 31 1.2 itojun #define _NETINET6_ND6_H_ 32 1.2 itojun 33 1.2 itojun #include <sys/queue.h> 34 1.2 itojun 35 1.2 itojun struct llinfo_nd6 { 36 1.2 itojun struct llinfo_nd6 *ln_next; 37 1.2 itojun struct llinfo_nd6 *ln_prev; 38 1.2 itojun struct rtentry *ln_rt; 39 1.2 itojun struct mbuf *ln_hold; /* last packet until resolved/timeout */ 40 1.2 itojun long ln_asked; /* number of queries already sent for this addr */ 41 1.2 itojun u_long ln_expire; /* lifetime for NDP state transition */ 42 1.2 itojun short ln_state; /* reachability state */ 43 1.2 itojun short ln_router; /* 2^0: ND6 router bit */ 44 1.2 itojun }; 45 1.2 itojun 46 1.2 itojun #define ND6_LLINFO_NOSTATE -2 47 1.2 itojun #define ND6_LLINFO_WAITDELETE -1 48 1.2 itojun #define ND6_LLINFO_INCOMPLETE 0 49 1.2 itojun #define ND6_LLINFO_REACHABLE 1 50 1.2 itojun #define ND6_LLINFO_STALE 2 51 1.2 itojun #define ND6_LLINFO_DELAY 3 52 1.2 itojun #define ND6_LLINFO_PROBE 4 53 1.2 itojun 54 1.2 itojun struct nd_ifinfo { 55 1.2 itojun u_int32_t linkmtu; /* LinkMTU */ 56 1.2 itojun u_int32_t maxmtu; /* Upper bound of LinkMTU */ 57 1.2 itojun u_int32_t basereachable; /* BaseReachableTime */ 58 1.2 itojun u_int32_t reachable; /* Reachable Time */ 59 1.2 itojun u_int32_t retrans; /* Retrans Timer */ 60 1.2 itojun int recalctm; /* BaseReacable re-calculation timer */ 61 1.2 itojun u_int8_t chlim; /* CurHopLimit */ 62 1.2 itojun u_int8_t receivedra; 63 1.2 itojun }; 64 1.2 itojun 65 1.2 itojun struct in6_nbrinfo { 66 1.2 itojun char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 67 1.2 itojun struct in6_addr addr; /* IPv6 address of the neighbor */ 68 1.2 itojun long asked; /* number of queries already sent for this addr */ 69 1.2 itojun int isrouter; /* if it acts as a router */ 70 1.2 itojun int state; /* reachability state */ 71 1.2 itojun int expire; /* lifetime for NDP state transition */ 72 1.2 itojun }; 73 1.2 itojun 74 1.2 itojun #define DRLSTSIZ 10 75 1.2 itojun #define PRLSTSIZ 10 76 1.2 itojun struct in6_drlist { 77 1.2 itojun char ifname[IFNAMSIZ]; 78 1.2 itojun struct { 79 1.2 itojun struct in6_addr rtaddr; 80 1.2 itojun u_char flags; 81 1.2 itojun u_short rtlifetime; 82 1.2 itojun u_long expire; 83 1.2 itojun u_short if_index; 84 1.2 itojun } defrouter[DRLSTSIZ]; 85 1.2 itojun }; 86 1.2 itojun 87 1.2 itojun struct in6_prlist { 88 1.2 itojun char ifname[IFNAMSIZ]; 89 1.2 itojun struct { 90 1.2 itojun struct in6_addr prefix; 91 1.2 itojun struct prf_ra raflags; 92 1.2 itojun u_char prefixlen; 93 1.2 itojun u_long vltime; 94 1.2 itojun u_long pltime; 95 1.2 itojun u_long expire; 96 1.2 itojun u_short if_index; 97 1.2 itojun u_short advrtrs; /* number of advertisement routers */ 98 1.2 itojun struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 99 1.2 itojun } prefix[PRLSTSIZ]; 100 1.2 itojun }; 101 1.2 itojun 102 1.2 itojun struct in6_ndireq { 103 1.2 itojun char ifname[IFNAMSIZ]; 104 1.2 itojun struct nd_ifinfo ndi; 105 1.2 itojun }; 106 1.2 itojun 107 1.2 itojun /* protocol constants */ 108 1.2 itojun #define MAX_RTR_SOLICITATION_DELAY 1 /*1sec*/ 109 1.2 itojun #define RTR_SOLICITATION_INTERVAL 4 /*4sec*/ 110 1.2 itojun #define MAX_RTR_SOLICITATIONS 3 111 1.2 itojun 112 1.2 itojun #define ND6_INFINITE_LIFETIME 0xffffffff 113 1.2 itojun 114 1.2 itojun #ifdef _KERNEL 115 1.2 itojun /* node constants */ 116 1.2 itojun #define MAX_REACHABLE_TIME 3600000 /* msec */ 117 1.2 itojun #define REACHABLE_TIME 30000 /* msec */ 118 1.2 itojun #define RETRANS_TIMER 1000 /* msec */ 119 1.2 itojun #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 120 1.2 itojun #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 121 1.2 itojun #define ND_COMPUTE_RTIME(x) \ 122 1.2 itojun (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \ 123 1.2 itojun ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 124 1.2 itojun 125 1.2 itojun struct nd_defrouter { 126 1.2 itojun LIST_ENTRY(nd_defrouter) dr_entry; 127 1.2 itojun #define dr_next dr_entry.le_next 128 1.2 itojun struct in6_addr rtaddr; 129 1.2 itojun u_char flags; 130 1.2 itojun u_short rtlifetime; 131 1.2 itojun u_long expire; 132 1.2 itojun struct ifnet *ifp; 133 1.2 itojun }; 134 1.2 itojun 135 1.2 itojun struct nd_prefix { 136 1.2 itojun struct ifprefix ndpr_ifpr; 137 1.2 itojun LIST_ENTRY(nd_prefix) ndpr_entry; 138 1.2 itojun struct sockaddr_in6 ndpr_prefix; /* prefix */ 139 1.2 itojun struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 140 1.2 itojun struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 141 1.2 itojun u_int32_t ndpr_vltime; /* advertised valid lifetime */ 142 1.2 itojun u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 143 1.2 itojun time_t ndpr_expire; /* expiration time of the prefix */ 144 1.2 itojun time_t ndpr_preferred; /* preferred time of the prefix */ 145 1.2 itojun struct in6_prflags ndpr_flags; 146 1.2 itojun /* list of routers that advertise the prefix: */ 147 1.2 itojun LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 148 1.2 itojun u_char ndpr_origin; /* from where this prefix info is obtained */ 149 1.2 itojun struct ndpr_stateflags { 150 1.2 itojun /* if this prefix can be regarded as on-link */ 151 1.2 itojun u_char onlink : 1; 152 1.2 itojun /* if some prefix should be added to this prefix */ 153 1.2 itojun u_char addmark : 1; 154 1.2 itojun u_char delmark : 1; /* if this prefix will be deleted */ 155 1.2 itojun } ndpr_stateflags; 156 1.2 itojun }; 157 1.2 itojun 158 1.2 itojun #define ndpr_next ndpr_entry.le_next 159 1.2 itojun #define ndpr_ifp ndpr_ifpr.ifpr_ifp 160 1.2 itojun #define ndpr_plen ndpr_ifpr.ifpr_plen 161 1.2 itojun 162 1.2 itojun #define ndpr_raf ndpr_flags.prf_ra 163 1.2 itojun #define ndpr_raf_onlink ndpr_flags.prf_ra.onlink 164 1.2 itojun #define ndpr_raf_auto ndpr_flags.prf_ra.autonomous 165 1.2 itojun 166 1.2 itojun #define ndpr_statef_onlink ndpr_stateflags.onlink 167 1.2 itojun #define ndpr_statef_addmark ndpr_stateflags.addmark 168 1.2 itojun #define ndpr_statef_delmark ndpr_stateflags.delmark 169 1.2 itojun 170 1.2 itojun #define ndpr_rrf ndpr_flags.prf_rr 171 1.2 itojun #define ndpr_rrf_decrvalid ndpr_flags.prf_rr.decrvalid 172 1.2 itojun #define ndpr_rrf_decrprefd ndpr_flags.prf_rr.decrprefd 173 1.2 itojun 174 1.2 itojun /* 175 1.2 itojun * We keep expired prefix for certain amount of time, for validation purposes. 176 1.2 itojun * 1800s = MaxRtrAdvInterval 177 1.2 itojun */ 178 1.2 itojun #define NDPR_KEEP_EXPIRED (1800 * 2) 179 1.2 itojun 180 1.2 itojun /* 181 1.2 itojun * Message format for use in obtaining information about prefixes 182 1.2 itojun * from inet6 sysctl function 183 1.2 itojun */ 184 1.2 itojun struct inet6_ndpr_msghdr { 185 1.2 itojun u_short inpm_msglen; /* to skip over non-understood messages */ 186 1.2 itojun u_char inpm_version; /* future binary compatability */ 187 1.2 itojun u_char inpm_type; /* message type */ 188 1.2 itojun struct in6_addr inpm_prefix; 189 1.2 itojun u_long prm_vltim; 190 1.2 itojun u_long prm_pltime; 191 1.2 itojun u_long prm_expire; 192 1.2 itojun u_long prm_preferred; 193 1.2 itojun struct in6_prflags prm_flags; 194 1.2 itojun u_short prm_index; /* index for associated ifp */ 195 1.2 itojun u_char prm_plen; /* length of prefix in bits */ 196 1.2 itojun }; 197 1.2 itojun 198 1.2 itojun #define prm_raf_onlink prm_flags.prf_ra.onlink 199 1.2 itojun #define prm_raf_auto prm_flags.prf_ra.autonomous 200 1.2 itojun 201 1.2 itojun #define prm_statef_onlink prm_flags.prf_state.onlink 202 1.2 itojun 203 1.2 itojun #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 204 1.2 itojun #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 205 1.2 itojun 206 1.2 itojun #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 207 1.2 itojun #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) 208 1.2 itojun 209 1.2 itojun struct nd_pfxrouter { 210 1.2 itojun LIST_ENTRY(nd_pfxrouter) pfr_entry; 211 1.2 itojun #define pfr_next pfr_entry.le_next 212 1.2 itojun struct nd_defrouter *router; 213 1.2 itojun }; 214 1.2 itojun 215 1.2 itojun LIST_HEAD(nd_drhead, nd_defrouter); 216 1.2 itojun LIST_HEAD(nd_prhead, nd_prefix); 217 1.2 itojun 218 1.2 itojun /* nd6.c */ 219 1.2 itojun extern int nd6_prune; 220 1.2 itojun extern int nd6_delay; 221 1.2 itojun extern int nd6_umaxtries; 222 1.2 itojun extern int nd6_mmaxtries; 223 1.2 itojun extern int nd6_useloopback; 224 1.2 itojun extern int nd6_proxyall; 225 1.2 itojun extern struct llinfo_nd6 llinfo_nd6; 226 1.2 itojun extern struct nd_ifinfo *nd_ifinfo; 227 1.2 itojun extern struct nd_drhead nd_defrouter; 228 1.2 itojun extern struct nd_prhead nd_prefix; 229 1.2 itojun 230 1.2 itojun union nd_opts { 231 1.2 itojun struct nd_opt_hdr *nd_opt_array[9]; 232 1.2 itojun struct { 233 1.2 itojun struct nd_opt_hdr *zero; 234 1.2 itojun struct nd_opt_hdr *src_lladdr; 235 1.2 itojun struct nd_opt_hdr *tgt_lladdr; 236 1.2 itojun struct nd_opt_prefix_info *pi_beg;/* multiple opts, start */ 237 1.2 itojun struct nd_opt_rd_hdr *rh; 238 1.2 itojun struct nd_opt_mtu *mtu; 239 1.2 itojun struct nd_opt_hdr *search; /* multiple opts */ 240 1.2 itojun struct nd_opt_hdr *last; /* multiple opts */ 241 1.2 itojun int done; 242 1.2 itojun struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 243 1.2 itojun } nd_opt_each; 244 1.2 itojun }; 245 1.2 itojun #define nd_opts_src_lladdr nd_opt_each.src_lladdr 246 1.2 itojun #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 247 1.2 itojun #define nd_opts_pi nd_opt_each.pi_beg 248 1.2 itojun #define nd_opts_pi_end nd_opt_each.pi_end 249 1.2 itojun #define nd_opts_rh nd_opt_each.rh 250 1.2 itojun #define nd_opts_mtu nd_opt_each.mtu 251 1.2 itojun #define nd_opts_search nd_opt_each.search 252 1.2 itojun #define nd_opts_last nd_opt_each.last 253 1.2 itojun #define nd_opts_done nd_opt_each.done 254 1.2 itojun 255 1.2 itojun /* XXX: need nd6_var.h?? */ 256 1.2 itojun /* nd6.c */ 257 1.2 itojun void nd6_init __P((void)); 258 1.2 itojun void nd6_ifattach __P((struct ifnet *)); 259 1.2 itojun void nd6_option_init __P((void *, int, union nd_opts *)); 260 1.2 itojun struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 261 1.2 itojun int nd6_options __P((union nd_opts *)); 262 1.2 itojun struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 263 1.2 itojun void nd6_setmtu __P((struct ifnet *)); 264 1.2 itojun void nd6_timer __P((void *)); 265 1.2 itojun void nd6_free __P((struct rtentry *)); 266 1.2 itojun void nd6_nud_hint __P((struct rtentry *, struct in6_addr *)); 267 1.2 itojun int nd6_resolve __P((struct ifnet *, struct rtentry *, 268 1.2 itojun struct mbuf *, struct sockaddr *, u_char *)); 269 1.2 itojun void nd6_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 270 1.2 itojun void nd6_p2p_rtrequest __P((int, struct rtentry *, struct sockaddr *)); 271 1.2 itojun int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 272 1.2 itojun struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 273 1.2 itojun char *, int, int)); 274 1.2 itojun /* for test */ 275 1.2 itojun int nd6_output __P((struct ifnet *, struct mbuf *, struct sockaddr_in6 *, 276 1.2 itojun struct rtentry *)); 277 1.2 itojun int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 278 1.2 itojun struct sockaddr *, u_char *)); 279 1.2 itojun 280 1.2 itojun /* nd6_nbr.c */ 281 1.2 itojun void nd6_na_input __P((struct mbuf *, int, int)); 282 1.2 itojun void nd6_na_output __P((struct ifnet *, struct in6_addr *, 283 1.2 itojun struct in6_addr *, u_long, int)); 284 1.2 itojun void nd6_ns_input __P((struct mbuf *, int, int)); 285 1.2 itojun void nd6_ns_output __P((struct ifnet *, struct in6_addr *, 286 1.2 itojun struct in6_addr *, struct llinfo_nd6 *, int)); 287 1.2 itojun caddr_t nd6_ifptomac __P((struct ifnet *)); 288 1.2 itojun void nd6_dad_start __P((struct ifaddr *, int *)); 289 1.2 itojun void nd6_dad_duplicated __P((struct ifaddr *)); 290 1.2 itojun 291 1.2 itojun /* nd6_rtr.c */ 292 1.2 itojun void nd6_rs_input __P((struct mbuf *, int, int)); 293 1.2 itojun void nd6_ra_input __P((struct mbuf *, int, int)); 294 1.2 itojun void prelist_del __P((struct nd_prefix *)); 295 1.2 itojun void defrouter_addreq __P((struct nd_defrouter *)); 296 1.2 itojun void defrouter_delreq __P((struct nd_defrouter *, int)); 297 1.2 itojun void defrtrlist_del __P((struct nd_defrouter *)); 298 1.2 itojun void prelist_remove __P((struct nd_prefix *)); 299 1.2 itojun int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 300 1.2 itojun struct mbuf *)); 301 1.2 itojun struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, 302 1.2 itojun struct ifnet *)); 303 1.2 itojun int in6_ifdel __P((struct ifnet *, struct in6_addr *)); 304 1.2 itojun int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 305 1.2 itojun void rt6_flush __P((struct in6_addr *, struct ifnet *)); 306 1.2 itojun 307 1.2 itojun #endif /* _KERNEL */ 308 1.2 itojun 309 1.2 itojun #endif /* _NETINET6_ND6_H_ */ 310
Indexes created Mon Sep 22 21:09:42 GMT 2025