1 /*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $ 30 * $FreeBSD$ 31 */ 32 33 #ifndef _NETINET6_ND6_H_ 34 #define _NETINET6_ND6_H_ 35 36 /* see net/route.h, or net/if_inarp.h */ 37 #ifndef RTF_ANNOUNCE 38 #define RTF_ANNOUNCE RTF_PROTO2 39 #endif 40 41 #include <sys/queue.h> 42 #include <sys/callout.h> 43 44 struct llentry; 45 46 #define ND6_LLINFO_NOSTATE -2 47 /* 48 * We don't need the WAITDELETE state any more, but we keep the definition 49 * in a comment line instead of removing it. This is necessary to avoid 50 * unintentionally reusing the value for another purpose, which might 51 * affect backward compatibility with old applications. 52 * (20000711 jinmei@kame.net) 53 */ 54 /* #define ND6_LLINFO_WAITDELETE -1 */ 55 #define ND6_LLINFO_INCOMPLETE 0 56 #define ND6_LLINFO_REACHABLE 1 57 #define ND6_LLINFO_STALE 2 58 #define ND6_LLINFO_DELAY 3 59 #define ND6_LLINFO_PROBE 4 60 61 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 62 #define ND6_LLINFO_PERMANENT(n) (((n)->la_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE)) 63 64 struct nd_ifinfo { 65 u_int32_t linkmtu; /* LinkMTU */ 66 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 67 u_int32_t basereachable; /* BaseReachableTime */ 68 u_int32_t reachable; /* Reachable Time */ 69 u_int32_t retrans; /* Retrans Timer */ 70 u_int32_t flags; /* Flags */ 71 int recalctm; /* BaseReacable re-calculation timer */ 72 u_int8_t chlim; /* CurHopLimit */ 73 u_int8_t initialized; /* Flag to see the entry is initialized */ 74 /* the following 3 members are for privacy extension for addrconf */ 75 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 76 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 77 u_int8_t randomid[8]; /* current random ID */ 78 }; 79 80 #define ND6_IFF_PERFORMNUD 0x1 81 #define ND6_IFF_ACCEPT_RTADV 0x2 82 #define ND6_IFF_PREFER_SOURCE 0x4 /* Not used in FreeBSD. */ 83 #define ND6_IFF_IFDISABLED 0x8 /* IPv6 operation is disabled due to 84 * DAD failure. (XXX: not ND-specific) 85 */ 86 #define ND6_IFF_DONT_SET_IFROUTE 0x10 87 #define ND6_IFF_AUTO_LINKLOCAL 0x20 88 #define ND6_IFF_NO_RADR 0x40 89 90 #define ND6_CREATE LLE_CREATE 91 #define ND6_EXCLUSIVE LLE_EXCLUSIVE 92 93 #ifdef _KERNEL 94 #define ND_IFINFO(ifp) \ 95 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 96 #define IN6_LINKMTU(ifp) \ 97 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 98 ? ND_IFINFO(ifp)->linkmtu \ 99 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ 100 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) 101 #endif 102 103 struct in6_nbrinfo { 104 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 105 struct in6_addr addr; /* IPv6 address of the neighbor */ 106 long asked; /* number of queries already sent for this addr */ 107 int isrouter; /* if it acts as a router */ 108 int state; /* reachability state */ 109 int expire; /* lifetime for NDP state transition */ 110 }; 111 112 #define DRLSTSIZ 10 113 #define PRLSTSIZ 10 114 struct in6_drlist { 115 char ifname[IFNAMSIZ]; 116 struct { 117 struct in6_addr rtaddr; 118 u_char flags; 119 u_short rtlifetime; 120 u_long expire; 121 u_short if_index; 122 } defrouter[DRLSTSIZ]; 123 }; 124 125 struct in6_defrouter { 126 struct sockaddr_in6 rtaddr; 127 u_char flags; 128 u_short rtlifetime; 129 u_long expire; 130 u_short if_index; 131 }; 132 133 #ifdef _KERNEL 134 struct in6_oprlist { 135 char ifname[IFNAMSIZ]; 136 struct { 137 struct in6_addr prefix; 138 struct prf_ra raflags; 139 u_char prefixlen; 140 u_char origin; 141 u_long vltime; 142 u_long pltime; 143 u_long expire; 144 u_short if_index; 145 u_short advrtrs; /* number of advertisement routers */ 146 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 147 } prefix[PRLSTSIZ]; 148 }; 149 #endif 150 151 struct in6_prlist { 152 char ifname[IFNAMSIZ]; 153 struct { 154 struct in6_addr prefix; 155 struct prf_ra raflags; 156 u_char prefixlen; 157 u_char origin; 158 u_int32_t vltime; 159 u_int32_t pltime; 160 time_t expire; 161 u_short if_index; 162 u_short advrtrs; /* number of advertisement routers */ 163 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 164 } prefix[PRLSTSIZ]; 165 }; 166 167 struct in6_prefix { 168 struct sockaddr_in6 prefix; 169 struct prf_ra raflags; 170 u_char prefixlen; 171 u_char origin; 172 u_int32_t vltime; 173 u_int32_t pltime; 174 time_t expire; 175 u_int32_t flags; 176 int refcnt; 177 u_short if_index; 178 u_short advrtrs; /* number of advertisement routers */ 179 /* struct sockaddr_in6 advrtr[] */ 180 }; 181 182 #ifdef _KERNEL 183 struct in6_ondireq { 184 char ifname[IFNAMSIZ]; 185 struct { 186 u_int32_t linkmtu; /* LinkMTU */ 187 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 188 u_int32_t basereachable; /* BaseReachableTime */ 189 u_int32_t reachable; /* Reachable Time */ 190 u_int32_t retrans; /* Retrans Timer */ 191 u_int32_t flags; /* Flags */ 192 int recalctm; /* BaseReacable re-calculation timer */ 193 u_int8_t chlim; /* CurHopLimit */ 194 u_int8_t receivedra; 195 } ndi; 196 }; 197 #endif 198 199 struct in6_ndireq { 200 char ifname[IFNAMSIZ]; 201 struct nd_ifinfo ndi; 202 }; 203 204 struct in6_ndifreq { 205 char ifname[IFNAMSIZ]; 206 u_long ifindex; 207 }; 208 209 /* Prefix status */ 210 #define NDPRF_ONLINK 0x1 211 #define NDPRF_DETACHED 0x2 212 213 /* protocol constants */ 214 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 215 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 216 #define MAX_RTR_SOLICITATIONS 3 217 218 #define ND6_INFINITE_LIFETIME 0xffffffff 219 220 #ifdef _KERNEL 221 /* node constants */ 222 #define MAX_REACHABLE_TIME 3600000 /* msec */ 223 #define REACHABLE_TIME 30000 /* msec */ 224 #define RETRANS_TIMER 1000 /* msec */ 225 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 226 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 227 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 228 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 229 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 230 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 231 #define ND_COMPUTE_RTIME(x) \ 232 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ 233 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 234 235 TAILQ_HEAD(nd_drhead, nd_defrouter); 236 struct nd_defrouter { 237 TAILQ_ENTRY(nd_defrouter) dr_entry; 238 struct in6_addr rtaddr; 239 u_char flags; /* flags on RA message */ 240 u_short rtlifetime; 241 u_long expire; 242 struct ifnet *ifp; 243 int installed; /* is installed into kernel routing table */ 244 }; 245 246 struct nd_prefixctl { 247 struct ifnet *ndpr_ifp; 248 249 /* prefix */ 250 struct sockaddr_in6 ndpr_prefix; 251 u_char ndpr_plen; 252 253 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 254 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 255 256 struct prf_ra ndpr_flags; 257 }; 258 259 260 struct nd_prefix { 261 struct ifnet *ndpr_ifp; 262 LIST_ENTRY(nd_prefix) ndpr_entry; 263 struct sockaddr_in6 ndpr_prefix; /* prefix */ 264 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 265 266 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 267 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 268 269 time_t ndpr_expire; /* expiration time of the prefix */ 270 time_t ndpr_preferred; /* preferred time of the prefix */ 271 time_t ndpr_lastupdate; /* reception time of last advertisement */ 272 273 struct prf_ra ndpr_flags; 274 u_int32_t ndpr_stateflags; /* actual state flags */ 275 /* list of routers that advertise the prefix: */ 276 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 277 u_char ndpr_plen; 278 int ndpr_refcnt; /* reference couter from addresses */ 279 }; 280 281 #define ndpr_raf ndpr_flags 282 #define ndpr_raf_onlink ndpr_flags.onlink 283 #define ndpr_raf_auto ndpr_flags.autonomous 284 #define ndpr_raf_router ndpr_flags.router 285 286 /* 287 * Message format for use in obtaining information about prefixes 288 * from inet6 sysctl function 289 */ 290 struct inet6_ndpr_msghdr { 291 u_short inpm_msglen; /* to skip over non-understood messages */ 292 u_char inpm_version; /* future binary compatibility */ 293 u_char inpm_type; /* message type */ 294 struct in6_addr inpm_prefix; 295 u_long prm_vltim; 296 u_long prm_pltime; 297 u_long prm_expire; 298 u_long prm_preferred; 299 struct in6_prflags prm_flags; 300 u_short prm_index; /* index for associated ifp */ 301 u_char prm_plen; /* length of prefix in bits */ 302 }; 303 304 #define prm_raf_onlink prm_flags.prf_ra.onlink 305 #define prm_raf_auto prm_flags.prf_ra.autonomous 306 307 #define prm_statef_onlink prm_flags.prf_state.onlink 308 309 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 310 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 311 312 struct nd_pfxrouter { 313 LIST_ENTRY(nd_pfxrouter) pfr_entry; 314 struct nd_defrouter *router; 315 }; 316 317 LIST_HEAD(nd_prhead, nd_prefix); 318 319 /* nd6.c */ 320 VNET_DECLARE(int, nd6_prune); 321 VNET_DECLARE(int, nd6_delay); 322 VNET_DECLARE(int, nd6_umaxtries); 323 VNET_DECLARE(int, nd6_mmaxtries); 324 VNET_DECLARE(int, nd6_useloopback); 325 VNET_DECLARE(int, nd6_maxnudhint); 326 VNET_DECLARE(int, nd6_gctimer); 327 VNET_DECLARE(struct nd_drhead, nd_defrouter); 328 VNET_DECLARE(struct nd_prhead, nd_prefix); 329 VNET_DECLARE(int, nd6_debug); 330 VNET_DECLARE(int, nd6_onlink_ns_rfc4861); 331 #define V_nd6_prune VNET(nd6_prune) 332 #define V_nd6_delay VNET(nd6_delay) 333 #define V_nd6_umaxtries VNET(nd6_umaxtries) 334 #define V_nd6_mmaxtries VNET(nd6_mmaxtries) 335 #define V_nd6_useloopback VNET(nd6_useloopback) 336 #define V_nd6_maxnudhint VNET(nd6_maxnudhint) 337 #define V_nd6_gctimer VNET(nd6_gctimer) 338 #define V_nd_defrouter VNET(nd_defrouter) 339 #define V_nd_prefix VNET(nd_prefix) 340 #define V_nd6_debug VNET(nd6_debug) 341 #define V_nd6_onlink_ns_rfc4861 VNET(nd6_onlink_ns_rfc4861) 342 343 #define nd6log(x) do { if (V_nd6_debug) log x; } while (/*CONSTCOND*/ 0) 344 345 VNET_DECLARE(struct callout, nd6_timer_ch); 346 #define V_nd6_timer_ch VNET(nd6_timer_ch) 347 348 /* nd6_rtr.c */ 349 VNET_DECLARE(int, nd6_defifindex); 350 VNET_DECLARE(int, ip6_desync_factor); /* seconds */ 351 VNET_DECLARE(u_int32_t, ip6_temp_preferred_lifetime); /* seconds */ 352 VNET_DECLARE(u_int32_t, ip6_temp_valid_lifetime); /* seconds */ 353 VNET_DECLARE(int, ip6_temp_regen_advance); /* seconds */ 354 #define V_nd6_defifindex VNET(nd6_defifindex) 355 #define V_ip6_desync_factor VNET(ip6_desync_factor) 356 #define V_ip6_temp_preferred_lifetime VNET(ip6_temp_preferred_lifetime) 357 #define V_ip6_temp_valid_lifetime VNET(ip6_temp_valid_lifetime) 358 #define V_ip6_temp_regen_advance VNET(ip6_temp_regen_advance) 359 360 union nd_opts { 361 struct nd_opt_hdr *nd_opt_array[8]; /* max = target address list */ 362 struct { 363 struct nd_opt_hdr *zero; 364 struct nd_opt_hdr *src_lladdr; 365 struct nd_opt_hdr *tgt_lladdr; 366 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 367 struct nd_opt_rd_hdr *rh; 368 struct nd_opt_mtu *mtu; 369 struct nd_opt_hdr *search; /* multiple opts */ 370 struct nd_opt_hdr *last; /* multiple opts */ 371 int done; 372 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 373 } nd_opt_each; 374 }; 375 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 376 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 377 #define nd_opts_pi nd_opt_each.pi_beg 378 #define nd_opts_pi_end nd_opt_each.pi_end 379 #define nd_opts_rh nd_opt_each.rh 380 #define nd_opts_mtu nd_opt_each.mtu 381 #define nd_opts_search nd_opt_each.search 382 #define nd_opts_last nd_opt_each.last 383 #define nd_opts_done nd_opt_each.done 384 385 /* XXX: need nd6_var.h?? */ 386 /* nd6.c */ 387 void nd6_init(void); 388 #ifdef VIMAGE 389 void nd6_destroy(void); 390 #endif 391 struct nd_ifinfo *nd6_ifattach(struct ifnet *); 392 void nd6_ifdetach(struct nd_ifinfo *); 393 int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *); 394 void nd6_option_init(void *, int, union nd_opts *); 395 struct nd_opt_hdr *nd6_option(union nd_opts *); 396 int nd6_options(union nd_opts *); 397 struct llentry *nd6_lookup(struct in6_addr *, int, struct ifnet *); 398 void nd6_setmtu(struct ifnet *); 399 void nd6_llinfo_settimer(struct llentry *, long); 400 void nd6_llinfo_settimer_locked(struct llentry *, long); 401 void nd6_timer(void *); 402 void nd6_purge(struct ifnet *); 403 void nd6_nud_hint(struct rtentry *, struct in6_addr *, int); 404 int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *, 405 struct sockaddr *, u_char *); 406 void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 407 int nd6_ioctl(u_long, caddr_t, struct ifnet *); 408 struct llentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *, 409 char *, int, int, int); 410 int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, 411 struct sockaddr_in6 *, struct rtentry *); 412 int nd6_output_lle(struct ifnet *, struct ifnet *, struct mbuf *, 413 struct sockaddr_in6 *, struct rtentry *, struct llentry *, 414 struct mbuf **); 415 int nd6_output_flush(struct ifnet *, struct ifnet *, struct mbuf *, 416 struct sockaddr_in6 *, struct route *); 417 int nd6_need_cache(struct ifnet *); 418 int nd6_storelladdr(struct ifnet *, struct mbuf *, 419 struct sockaddr *, u_char *, struct llentry **); 420 421 /* nd6_nbr.c */ 422 void nd6_na_input(struct mbuf *, int, int); 423 void nd6_na_output(struct ifnet *, const struct in6_addr *, 424 const struct in6_addr *, u_long, int, struct sockaddr *); 425 void nd6_ns_input(struct mbuf *, int, int); 426 void nd6_ns_output(struct ifnet *, const struct in6_addr *, 427 const struct in6_addr *, struct llentry *, int); 428 caddr_t nd6_ifptomac(struct ifnet *); 429 void nd6_dad_start(struct ifaddr *, int); 430 void nd6_dad_stop(struct ifaddr *); 431 void nd6_dad_duplicated(struct ifaddr *); 432 433 /* nd6_rtr.c */ 434 void nd6_rs_input(struct mbuf *, int, int); 435 void nd6_ra_input(struct mbuf *, int, int); 436 void prelist_del(struct nd_prefix *); 437 void defrouter_reset(void); 438 void defrouter_select(void); 439 void defrtrlist_del(struct nd_defrouter *); 440 void prelist_remove(struct nd_prefix *); 441 int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *, 442 struct nd_prefix **); 443 void pfxlist_onlink_check(void); 444 struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *); 445 struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *); 446 void rt6_flush(struct in6_addr *, struct ifnet *); 447 int nd6_setdefaultiface(int); 448 int in6_tmpifadd(const struct in6_ifaddr *, int, int); 449 450 #endif /* _KERNEL */ 451 452 #endif /* _NETINET6_ND6_H_ */ 453