nd6.h revision 1.60
1 /* $NetBSD: nd6.h,v 1.60 2014/09/05 06:08:15 matt 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 struct llinfo_nd6 { 40 struct llinfo_nd6 *ln_next; 41 struct llinfo_nd6 *ln_prev; 42 struct rtentry *ln_rt; 43 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 44 long ln_asked; /* number of queries already sent for this addr */ 45 u_long ln_expire; /* lifetime for NDP state transition */ 46 short ln_state; /* reachability state */ 47 short ln_router; /* 2^0: ND6 router bit */ 48 int ln_byhint; /* # of times we made it reachable by UL hint */ 49 50 long ln_ntick; 51 struct callout ln_timer_ch; 52 }; 53 54 #define ND6_LLINFO_PURGE -3 55 #define ND6_LLINFO_NOSTATE -2 56 /* 57 * We don't need the WAITDELETE state any more, but we keep the definition 58 * in a comment line instead of removing it. This is necessary to avoid 59 * unintentionally reusing the value for another purpose, which might 60 * affect backward compatibility with old applications. 61 * (20000711 jinmei (at) kame.net) 62 */ 63 /* #define ND6_LLINFO_WAITDELETE -1 */ 64 #define ND6_LLINFO_INCOMPLETE 0 65 #define ND6_LLINFO_REACHABLE 1 66 #define ND6_LLINFO_STALE 2 67 #define ND6_LLINFO_DELAY 3 68 #define ND6_LLINFO_PROBE 4 69 70 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 71 #define ND6_LLINFO_PERMANENT(n) (((n)->ln_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE)) 72 73 struct nd_ifinfo { 74 u_int32_t linkmtu; /* LinkMTU */ 75 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 76 u_int32_t basereachable; /* BaseReachableTime */ 77 u_int32_t reachable; /* Reachable Time */ 78 u_int32_t retrans; /* Retrans Timer */ 79 u_int32_t flags; /* Flags */ 80 int recalctm; /* BaseReacable re-calculation timer */ 81 u_int8_t chlim; /* CurHopLimit */ 82 u_int8_t initialized; /* Flag to see the entry is initialized */ 83 /* the following 3 members are for privacy extension for addrconf */ 84 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 85 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 86 u_int8_t randomid[8]; /* current random ID */ 87 }; 88 89 #define ND6_IFF_PERFORMNUD 0x01 90 #define ND6_IFF_ACCEPT_RTADV 0x02 /* See "RTADV Key", below. */ 91 #define ND6_IFF_PREFER_SOURCE 0x04 /* XXX: not related to ND. */ 92 #define ND6_IFF_IFDISABLED 0x08 /* IPv6 operation is disabled due to 93 * DAD failure. (XXX: not ND-specific) 94 */ 95 #define ND6_IFF_OVERRIDE_RTADV 0x10 /* See "RTADV Key", below. */ 96 #define ND6_IFF_AUTO_LINKLOCAL 0x20 97 98 /* 99 * RTADV Key 100 * 101 * The flags ND6_IFF_ACCEPT_RTADV and ND6_IFF_OVERRIDE_RTADV form a 102 * tri-state variable. (There are actually four different states, but 103 * two of the states are functionally identical.) 104 * 105 * ND6_IFF_OVERRIDE_RTADV or 0: This interface does not accept 106 * Router Advertisements. 107 * 108 * ND6_IFF_OVERRIDE_RTADV| 109 * ND6_IFF_ACCEPT_RTADV: This interface accepts Router 110 * Advertisements regardless of the 111 * global setting, ip6_accept_rtadv. 112 * 113 * ND6_IFF_ACCEPT_RTADV: This interface follows the global setting, 114 * ip6_accept_rtadv. If ip6_accept_rtadv == 0, 115 * this interface does not accept Router 116 * Advertisements. If ip6_accept_rtadv != 0, 117 * this interface does accept them. 118 */ 119 120 #ifdef _KERNEL 121 #define ND_IFINFO(ifp) \ 122 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 123 #define IN6_LINKMTU(ifp) \ 124 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 125 ? ND_IFINFO(ifp)->linkmtu \ 126 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ 127 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) 128 #endif 129 130 struct in6_nbrinfo { 131 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 132 struct in6_addr addr; /* IPv6 address of the neighbor */ 133 long asked; /* number of queries already sent for this addr */ 134 int isrouter; /* if it acts as a router */ 135 int state; /* reachability state */ 136 int expire; /* lifetime for NDP state transition */ 137 }; 138 139 #define DRLSTSIZ 10 140 #define PRLSTSIZ 10 141 struct in6_drlist { 142 char ifname[IFNAMSIZ]; 143 struct { 144 struct in6_addr rtaddr; 145 u_char flags; 146 u_short rtlifetime; 147 u_long expire; 148 u_short if_index; 149 } defrouter[DRLSTSIZ]; 150 }; 151 152 struct in6_defrouter { 153 struct sockaddr_in6 rtaddr; 154 u_char flags; 155 u_short rtlifetime; 156 u_long expire; 157 u_short if_index; 158 }; 159 160 #ifdef _KERNEL 161 struct in6_oprlist { 162 char ifname[IFNAMSIZ]; 163 struct { 164 struct in6_addr prefix; 165 struct prf_ra raflags; 166 u_char prefixlen; 167 u_char origin; 168 u_long vltime; 169 u_long pltime; 170 u_long expire; 171 u_short if_index; 172 u_short advrtrs; /* number of advertisement routers */ 173 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 174 } prefix[PRLSTSIZ]; 175 }; 176 #endif 177 178 struct in6_prlist { 179 char ifname[IFNAMSIZ]; 180 struct { 181 struct in6_addr prefix; 182 struct prf_ra raflags; 183 u_char prefixlen; 184 u_char origin; 185 u_int32_t vltime; 186 u_int32_t pltime; 187 time_t expire; 188 u_short if_index; 189 u_short advrtrs; /* number of advertisement routers */ 190 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 191 } prefix[PRLSTSIZ]; 192 }; 193 194 struct in6_prefix { 195 struct sockaddr_in6 prefix; 196 struct prf_ra raflags; 197 u_char prefixlen; 198 u_char origin; 199 u_int32_t vltime; 200 u_int32_t pltime; 201 time_t expire; 202 u_int32_t flags; 203 int refcnt; 204 u_short if_index; 205 u_short advrtrs; /* number of advertisement routers */ 206 /* struct sockaddr_in6 advrtr[] */ 207 }; 208 209 #ifdef _KERNEL 210 struct in6_ondireq { 211 char ifname[IFNAMSIZ]; 212 struct { 213 u_int32_t linkmtu; /* LinkMTU */ 214 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 215 u_int32_t basereachable; /* BaseReachableTime */ 216 u_int32_t reachable; /* Reachable Time */ 217 u_int32_t retrans; /* Retrans Timer */ 218 u_int32_t flags; /* Flags */ 219 int recalctm; /* BaseReacable re-calculation timer */ 220 u_int8_t chlim; /* CurHopLimit */ 221 u_int8_t receivedra; 222 } ndi; 223 }; 224 #endif 225 226 struct in6_ndireq { 227 char ifname[IFNAMSIZ]; 228 struct nd_ifinfo ndi; 229 }; 230 231 struct in6_ndifreq { 232 char ifname[IFNAMSIZ]; 233 u_long ifindex; 234 }; 235 236 /* Prefix status */ 237 #define NDPRF_ONLINK 0x1 238 #define NDPRF_DETACHED 0x2 239 #define NDPRF_HOME 0x4 240 241 /* protocol constants */ 242 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 243 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 244 #define MAX_RTR_SOLICITATIONS 3 245 246 #define ND6_INFINITE_LIFETIME ((u_int32_t)~0) 247 248 #ifdef _KERNEL 249 /* node constants */ 250 #define MAX_REACHABLE_TIME 3600000 /* msec */ 251 #define REACHABLE_TIME 30000 /* msec */ 252 #define RETRANS_TIMER 1000 /* msec */ 253 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 254 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 255 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 256 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 257 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 258 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 259 #define ND_COMPUTE_RTIME(x) \ 260 (((MIN_RANDOM_FACTOR * (x >> 10)) + (cprng_fast32() & \ 261 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 262 263 TAILQ_HEAD(nd_drhead, nd_defrouter); 264 struct nd_defrouter { 265 TAILQ_ENTRY(nd_defrouter) dr_entry; 266 struct in6_addr rtaddr; 267 u_char flags; /* flags on RA message */ 268 u_short rtlifetime; 269 u_long expire; 270 struct ifnet *ifp; 271 int installed; /* is installed into kernel routing table */ 272 }; 273 274 struct nd_prefixctl { 275 struct ifnet *ndprc_ifp; 276 277 /* prefix */ 278 struct sockaddr_in6 ndprc_prefix; 279 u_char ndprc_plen; 280 281 u_int32_t ndprc_vltime; /* advertised valid lifetime */ 282 u_int32_t ndprc_pltime; /* advertised preferred lifetime */ 283 284 struct prf_ra ndprc_flags; 285 }; 286 287 #define ndprc_raf ndprc_flags 288 #define ndprc_raf_onlink ndprc_flags.onlink 289 #define ndprc_raf_auto ndprc_flags.autonomous 290 #define ndprc_raf_router ndprc_flags.router 291 292 struct nd_prefix { 293 struct ifnet *ndpr_ifp; 294 LIST_ENTRY(nd_prefix) ndpr_entry; 295 struct sockaddr_in6 ndpr_prefix; /* prefix */ 296 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 297 298 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 299 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 300 301 time_t ndpr_expire; /* expiration time of the prefix */ 302 time_t ndpr_preferred; /* preferred time of the prefix */ 303 time_t ndpr_lastupdate; /* reception time of last advertisement */ 304 305 struct prf_ra ndpr_flags; 306 u_int32_t ndpr_stateflags; /* actual state flags */ 307 /* list of routers that advertise the prefix: */ 308 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 309 u_char ndpr_plen; 310 int ndpr_refcnt; /* reference couter from addresses */ 311 }; 312 313 #define ndpr_next ndpr_entry.le_next 314 315 #define ndpr_raf ndpr_flags 316 #define ndpr_raf_onlink ndpr_flags.onlink 317 #define ndpr_raf_auto ndpr_flags.autonomous 318 #define ndpr_raf_router ndpr_flags.router 319 320 /* 321 * Message format for use in obtaining information about prefixes 322 * from inet6 sysctl function 323 */ 324 struct inet6_ndpr_msghdr { 325 u_short inpm_msglen; /* to skip over non-understood messages */ 326 u_char inpm_version; /* future binary compatibility */ 327 u_char inpm_type; /* message type */ 328 struct in6_addr inpm_prefix; 329 u_long prm_vltim; 330 u_long prm_pltime; 331 u_long prm_expire; 332 u_long prm_preferred; 333 struct in6_prflags prm_flags; 334 u_short prm_index; /* index for associated ifp */ 335 u_char prm_plen; /* length of prefix in bits */ 336 }; 337 338 #define prm_raf_onlink prm_flags.prf_ra.onlink 339 #define prm_raf_auto prm_flags.prf_ra.autonomous 340 341 #define prm_statef_onlink prm_flags.prf_state.onlink 342 343 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 344 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 345 346 struct nd_pfxrouter { 347 LIST_ENTRY(nd_pfxrouter) pfr_entry; 348 struct nd_defrouter *router; 349 }; 350 351 LIST_HEAD(nd_prhead, nd_prefix); 352 353 #include <sys/mallocvar.h> 354 MALLOC_DECLARE(M_IP6NDP); 355 356 /* nd6.c */ 357 extern int nd6_prune; 358 extern int nd6_delay; 359 extern int nd6_umaxtries; 360 extern int nd6_mmaxtries; 361 extern int nd6_useloopback; 362 extern int nd6_maxnudhint; 363 extern int nd6_gctimer; 364 extern struct llinfo_nd6 llinfo_nd6; 365 extern struct nd_drhead nd_defrouter; 366 extern struct nd_prhead nd_prefix; 367 extern int nd6_debug; 368 369 #define nd6log(x) do { if (nd6_debug) log x; } while (/*CONSTCOND*/ 0) 370 371 extern struct callout nd6_timer_ch; 372 373 /* nd6_rtr.c */ 374 extern int nd6_defifindex; 375 extern int ip6_desync_factor; /* seconds */ 376 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ 377 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ 378 extern int ip6_temp_regen_advance; /* seconds */ 379 extern int nd6_numroutes; 380 381 union nd_opts { 382 struct nd_opt_hdr *nd_opt_array[8]; 383 struct { 384 struct nd_opt_hdr *zero; 385 struct nd_opt_hdr *src_lladdr; 386 struct nd_opt_hdr *tgt_lladdr; 387 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 388 struct nd_opt_rd_hdr *rh; 389 struct nd_opt_mtu *mtu; 390 struct nd_opt_hdr *search; /* multiple opts */ 391 struct nd_opt_hdr *last; /* multiple opts */ 392 int done; 393 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 394 } nd_opt_each; 395 }; 396 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 397 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 398 #define nd_opts_pi nd_opt_each.pi_beg 399 #define nd_opts_pi_end nd_opt_each.pi_end 400 #define nd_opts_rh nd_opt_each.rh 401 #define nd_opts_mtu nd_opt_each.mtu 402 #define nd_opts_search nd_opt_each.search 403 #define nd_opts_last nd_opt_each.last 404 #define nd_opts_done nd_opt_each.done 405 406 /* XXX: need nd6_var.h?? */ 407 /* nd6.c */ 408 void nd6_init(void); 409 struct nd_ifinfo *nd6_ifattach(struct ifnet *); 410 void nd6_ifdetach(struct nd_ifinfo *); 411 int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *); 412 void nd6_option_init(void *, int, union nd_opts *); 413 struct nd_opt_hdr *nd6_option(union nd_opts *); 414 int nd6_options(union nd_opts *); 415 struct rtentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *); 416 void nd6_setmtu(struct ifnet *); 417 void nd6_llinfo_settimer(struct llinfo_nd6 *, long); 418 void nd6_timer(void *); 419 void nd6_purge(struct ifnet *); 420 void nd6_nud_hint(struct rtentry *, struct in6_addr *, int); 421 int nd6_resolve(struct ifnet *, struct rtentry *, 422 struct mbuf *, struct sockaddr *, u_char *); 423 void nd6_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 424 int nd6_ioctl(u_long, void *, struct ifnet *); 425 struct rtentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *, 426 char *, int, int, int); 427 int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, 428 const struct sockaddr_in6 *, struct rtentry *); 429 int nd6_storelladdr(const struct ifnet *, const struct rtentry *, struct mbuf *, 430 const struct sockaddr *, uint8_t *, size_t); 431 int nd6_sysctl(int, void *, size_t *, void *, size_t); 432 int nd6_need_cache(struct ifnet *); 433 void nd6_llinfo_release_pkts(struct llinfo_nd6 *, struct ifnet *, 434 struct rtentry *); 435 436 /* nd6_nbr.c */ 437 void nd6_na_input(struct mbuf *, int, int); 438 void nd6_na_output(struct ifnet *, const struct in6_addr *, 439 const struct in6_addr *, u_long, int, const struct sockaddr *); 440 void nd6_ns_input(struct mbuf *, int, int); 441 void nd6_ns_output(struct ifnet *, const struct in6_addr *, 442 const struct in6_addr *, struct llinfo_nd6 *, int); 443 const void *nd6_ifptomac(const struct ifnet *); 444 void nd6_newaddrmsg(struct ifaddr *); 445 void nd6_dad_start(struct ifaddr *, int); 446 void nd6_dad_stop(struct ifaddr *); 447 void nd6_dad_duplicated(struct ifaddr *); 448 449 /* nd6_rtr.c */ 450 void nd6_rs_input(struct mbuf *, int, int); 451 void nd6_ra_input(struct mbuf *, int, int); 452 void prelist_del(struct nd_prefix *); 453 void defrouter_addreq(struct nd_defrouter *); 454 void defrouter_reset(void); 455 void defrouter_select(void); 456 void defrtrlist_del(struct nd_defrouter *); 457 void prelist_remove(struct nd_prefix *); 458 int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *, 459 struct nd_prefix **); 460 int nd6_prefix_onlink(struct nd_prefix *); 461 int nd6_prefix_offlink(struct nd_prefix *); 462 void pfxlist_onlink_check(void); 463 struct nd_defrouter *defrouter_lookup(const struct in6_addr *, struct ifnet *); 464 struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *); 465 int in6_ifdel(struct ifnet *, struct in6_addr *); 466 void rt6_flush(struct in6_addr *, struct ifnet *); 467 int nd6_setdefaultiface(int); 468 int in6_tmpifadd(const struct in6_ifaddr *, int, int); 469 bool nd6_accepts_rtadv(const struct nd_ifinfo *); 470 471 #endif /* _KERNEL */ 472 473 #endif /* !_NETINET6_ND6_H_ */ 474
Indexes created Thu Sep 25 16:09:42 GMT 2025