nd6.h revision 1.58
1 /* $NetBSD: nd6.h,v 1.58 2013/05/21 08:37:27 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 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 97 /* 98 * RTADV Key 99 * 100 * The flags ND6_IFF_ACCEPT_RTADV and ND6_IFF_OVERRIDE_RTADV form a 101 * tri-state variable. (There are actually four different states, but 102 * two of the states are functionally identical.) 103 * 104 * ND6_IFF_OVERRIDE_RTADV or 0: This interface does not accept 105 * Router Advertisements. 106 * 107 * ND6_IFF_OVERRIDE_RTADV| 108 * ND6_IFF_ACCEPT_RTADV: This interface accepts Router 109 * Advertisements regardless of the 110 * global setting, ip6_accept_rtadv. 111 * 112 * ND6_IFF_ACCEPT_RTADV: This interface follows the global setting, 113 * ip6_accept_rtadv. If ip6_accept_rtadv == 0, 114 * this interface does not accept Router 115 * Advertisements. If ip6_accept_rtadv != 0, 116 * this interface does accept them. 117 */ 118 119 #ifdef _KERNEL 120 #define ND_IFINFO(ifp) \ 121 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 122 #define IN6_LINKMTU(ifp) \ 123 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 124 ? ND_IFINFO(ifp)->linkmtu \ 125 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ 126 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) 127 #endif 128 129 struct in6_nbrinfo { 130 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 131 struct in6_addr addr; /* IPv6 address of the neighbor */ 132 long asked; /* number of queries already sent for this addr */ 133 int isrouter; /* if it acts as a router */ 134 int state; /* reachability state */ 135 int expire; /* lifetime for NDP state transition */ 136 }; 137 138 #define DRLSTSIZ 10 139 #define PRLSTSIZ 10 140 struct in6_drlist { 141 char ifname[IFNAMSIZ]; 142 struct { 143 struct in6_addr rtaddr; 144 u_char flags; 145 u_short rtlifetime; 146 u_long expire; 147 u_short if_index; 148 } defrouter[DRLSTSIZ]; 149 }; 150 151 struct in6_defrouter { 152 struct sockaddr_in6 rtaddr; 153 u_char flags; 154 u_short rtlifetime; 155 u_long expire; 156 u_short if_index; 157 }; 158 159 #ifdef _KERNEL 160 struct in6_oprlist { 161 char ifname[IFNAMSIZ]; 162 struct { 163 struct in6_addr prefix; 164 struct prf_ra raflags; 165 u_char prefixlen; 166 u_char origin; 167 u_long vltime; 168 u_long pltime; 169 u_long expire; 170 u_short if_index; 171 u_short advrtrs; /* number of advertisement routers */ 172 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 173 } prefix[PRLSTSIZ]; 174 }; 175 #endif 176 177 struct in6_prlist { 178 char ifname[IFNAMSIZ]; 179 struct { 180 struct in6_addr prefix; 181 struct prf_ra raflags; 182 u_char prefixlen; 183 u_char origin; 184 u_int32_t vltime; 185 u_int32_t pltime; 186 time_t expire; 187 u_short if_index; 188 u_short advrtrs; /* number of advertisement routers */ 189 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 190 } prefix[PRLSTSIZ]; 191 }; 192 193 struct in6_prefix { 194 struct sockaddr_in6 prefix; 195 struct prf_ra raflags; 196 u_char prefixlen; 197 u_char origin; 198 u_int32_t vltime; 199 u_int32_t pltime; 200 time_t expire; 201 u_int32_t flags; 202 int refcnt; 203 u_short if_index; 204 u_short advrtrs; /* number of advertisement routers */ 205 /* struct sockaddr_in6 advrtr[] */ 206 }; 207 208 #ifdef _KERNEL 209 struct in6_ondireq { 210 char ifname[IFNAMSIZ]; 211 struct { 212 u_int32_t linkmtu; /* LinkMTU */ 213 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 214 u_int32_t basereachable; /* BaseReachableTime */ 215 u_int32_t reachable; /* Reachable Time */ 216 u_int32_t retrans; /* Retrans Timer */ 217 u_int32_t flags; /* Flags */ 218 int recalctm; /* BaseReacable re-calculation timer */ 219 u_int8_t chlim; /* CurHopLimit */ 220 u_int8_t receivedra; 221 } ndi; 222 }; 223 #endif 224 225 struct in6_ndireq { 226 char ifname[IFNAMSIZ]; 227 struct nd_ifinfo ndi; 228 }; 229 230 struct in6_ndifreq { 231 char ifname[IFNAMSIZ]; 232 u_long ifindex; 233 }; 234 235 /* Prefix status */ 236 #define NDPRF_ONLINK 0x1 237 #define NDPRF_DETACHED 0x2 238 #define NDPRF_HOME 0x4 239 240 /* protocol constants */ 241 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 242 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 243 #define MAX_RTR_SOLICITATIONS 3 244 245 #define ND6_INFINITE_LIFETIME ((u_int32_t)~0) 246 247 #ifdef _KERNEL 248 /* node constants */ 249 #define MAX_REACHABLE_TIME 3600000 /* msec */ 250 #define REACHABLE_TIME 30000 /* msec */ 251 #define RETRANS_TIMER 1000 /* msec */ 252 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 253 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 254 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 255 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 256 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 257 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 258 #define ND_COMPUTE_RTIME(x) \ 259 (((MIN_RANDOM_FACTOR * (x >> 10)) + (cprng_fast32() & \ 260 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 261 262 TAILQ_HEAD(nd_drhead, nd_defrouter); 263 struct nd_defrouter { 264 TAILQ_ENTRY(nd_defrouter) dr_entry; 265 struct in6_addr rtaddr; 266 u_char flags; /* flags on RA message */ 267 u_short rtlifetime; 268 u_long expire; 269 struct ifnet *ifp; 270 int installed; /* is installed into kernel routing table */ 271 }; 272 273 struct nd_prefixctl { 274 struct ifnet *ndpr_ifp; 275 276 /* prefix */ 277 struct sockaddr_in6 ndpr_prefix; 278 u_char ndpr_plen; 279 280 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 281 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 282 283 struct prf_ra ndpr_flags; 284 }; 285 286 struct nd_prefix { 287 struct ifnet *ndpr_ifp; 288 LIST_ENTRY(nd_prefix) ndpr_entry; 289 struct sockaddr_in6 ndpr_prefix; /* prefix */ 290 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 291 292 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 293 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 294 295 time_t ndpr_expire; /* expiration time of the prefix */ 296 time_t ndpr_preferred; /* preferred time of the prefix */ 297 time_t ndpr_lastupdate; /* reception time of last advertisement */ 298 299 struct prf_ra ndpr_flags; 300 u_int32_t ndpr_stateflags; /* actual state flags */ 301 /* list of routers that advertise the prefix: */ 302 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 303 u_char ndpr_plen; 304 int ndpr_refcnt; /* reference couter from addresses */ 305 }; 306 307 #define ndpr_next ndpr_entry.le_next 308 309 #define ndpr_raf ndpr_flags 310 #define ndpr_raf_onlink ndpr_flags.onlink 311 #define ndpr_raf_auto ndpr_flags.autonomous 312 #define ndpr_raf_router ndpr_flags.router 313 314 /* 315 * Message format for use in obtaining information about prefixes 316 * from inet6 sysctl function 317 */ 318 struct inet6_ndpr_msghdr { 319 u_short inpm_msglen; /* to skip over non-understood messages */ 320 u_char inpm_version; /* future binary compatibility */ 321 u_char inpm_type; /* message type */ 322 struct in6_addr inpm_prefix; 323 u_long prm_vltim; 324 u_long prm_pltime; 325 u_long prm_expire; 326 u_long prm_preferred; 327 struct in6_prflags prm_flags; 328 u_short prm_index; /* index for associated ifp */ 329 u_char prm_plen; /* length of prefix in bits */ 330 }; 331 332 #define prm_raf_onlink prm_flags.prf_ra.onlink 333 #define prm_raf_auto prm_flags.prf_ra.autonomous 334 335 #define prm_statef_onlink prm_flags.prf_state.onlink 336 337 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 338 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 339 340 struct nd_pfxrouter { 341 LIST_ENTRY(nd_pfxrouter) pfr_entry; 342 struct nd_defrouter *router; 343 }; 344 345 LIST_HEAD(nd_prhead, nd_prefix); 346 347 #include <sys/mallocvar.h> 348 MALLOC_DECLARE(M_IP6NDP); 349 350 /* nd6.c */ 351 extern int nd6_prune; 352 extern int nd6_delay; 353 extern int nd6_umaxtries; 354 extern int nd6_mmaxtries; 355 extern int nd6_useloopback; 356 extern int nd6_maxnudhint; 357 extern int nd6_gctimer; 358 extern struct llinfo_nd6 llinfo_nd6; 359 extern struct nd_drhead nd_defrouter; 360 extern struct nd_prhead nd_prefix; 361 extern int nd6_debug; 362 363 #define nd6log(x) do { if (nd6_debug) log x; } while (/*CONSTCOND*/ 0) 364 365 extern struct callout nd6_timer_ch; 366 367 /* nd6_rtr.c */ 368 extern int nd6_defifindex; 369 extern int ip6_desync_factor; /* seconds */ 370 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ 371 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ 372 extern int ip6_temp_regen_advance; /* seconds */ 373 extern int nd6_numroutes; 374 375 union nd_opts { 376 struct nd_opt_hdr *nd_opt_array[8]; 377 struct { 378 struct nd_opt_hdr *zero; 379 struct nd_opt_hdr *src_lladdr; 380 struct nd_opt_hdr *tgt_lladdr; 381 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 382 struct nd_opt_rd_hdr *rh; 383 struct nd_opt_mtu *mtu; 384 struct nd_opt_hdr *search; /* multiple opts */ 385 struct nd_opt_hdr *last; /* multiple opts */ 386 int done; 387 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 388 } nd_opt_each; 389 }; 390 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 391 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 392 #define nd_opts_pi nd_opt_each.pi_beg 393 #define nd_opts_pi_end nd_opt_each.pi_end 394 #define nd_opts_rh nd_opt_each.rh 395 #define nd_opts_mtu nd_opt_each.mtu 396 #define nd_opts_search nd_opt_each.search 397 #define nd_opts_last nd_opt_each.last 398 #define nd_opts_done nd_opt_each.done 399 400 /* XXX: need nd6_var.h?? */ 401 /* nd6.c */ 402 void nd6_init(void); 403 struct nd_ifinfo *nd6_ifattach(struct ifnet *); 404 void nd6_ifdetach(struct nd_ifinfo *); 405 int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *); 406 void nd6_option_init(void *, int, union nd_opts *); 407 struct nd_opt_hdr *nd6_option(union nd_opts *); 408 int nd6_options(union nd_opts *); 409 struct rtentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *); 410 void nd6_setmtu(struct ifnet *); 411 void nd6_llinfo_settimer(struct llinfo_nd6 *, long); 412 void nd6_timer(void *); 413 void nd6_purge(struct ifnet *); 414 void nd6_nud_hint(struct rtentry *, struct in6_addr *, int); 415 int nd6_resolve(struct ifnet *, struct rtentry *, 416 struct mbuf *, struct sockaddr *, u_char *); 417 void nd6_rtrequest(int, struct rtentry *, const struct rt_addrinfo *); 418 int nd6_ioctl(u_long, void *, struct ifnet *); 419 struct rtentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *, 420 char *, int, int, int); 421 int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, 422 const struct sockaddr_in6 *, struct rtentry *); 423 int nd6_storelladdr(const struct ifnet *, const struct rtentry *, struct mbuf *, 424 const struct sockaddr *, uint8_t *, size_t); 425 int nd6_sysctl(int, void *, size_t *, void *, size_t); 426 int nd6_need_cache(struct ifnet *); 427 void nd6_llinfo_release_pkts(struct llinfo_nd6 *, struct ifnet *, 428 struct rtentry *); 429 430 /* nd6_nbr.c */ 431 void nd6_na_input(struct mbuf *, int, int); 432 void nd6_na_output(struct ifnet *, const struct in6_addr *, 433 const struct in6_addr *, u_long, int, const struct sockaddr *); 434 void nd6_ns_input(struct mbuf *, int, int); 435 void nd6_ns_output(struct ifnet *, const struct in6_addr *, 436 const struct in6_addr *, struct llinfo_nd6 *, int); 437 const void *nd6_ifptomac(const struct ifnet *); 438 void nd6_newaddrmsg(struct ifaddr *); 439 void nd6_dad_start(struct ifaddr *, int); 440 void nd6_dad_stop(struct ifaddr *); 441 void nd6_dad_duplicated(struct ifaddr *); 442 443 /* nd6_rtr.c */ 444 void nd6_rs_input(struct mbuf *, int, int); 445 void nd6_ra_input(struct mbuf *, int, int); 446 void prelist_del(struct nd_prefix *); 447 void defrouter_addreq(struct nd_defrouter *); 448 void defrouter_reset(void); 449 void defrouter_select(void); 450 void defrtrlist_del(struct nd_defrouter *); 451 void prelist_remove(struct nd_prefix *); 452 int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *, 453 struct nd_prefix **); 454 int nd6_prefix_onlink(struct nd_prefix *); 455 int nd6_prefix_offlink(struct nd_prefix *); 456 void pfxlist_onlink_check(void); 457 struct nd_defrouter *defrouter_lookup(const struct in6_addr *, struct ifnet *); 458 struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *); 459 int in6_ifdel(struct ifnet *, struct in6_addr *); 460 void rt6_flush(struct in6_addr *, struct ifnet *); 461 int nd6_setdefaultiface(int); 462 int in6_tmpifadd(const struct in6_ifaddr *, int, int); 463 bool nd6_accepts_rtadv(const struct nd_ifinfo *); 464 465 #endif /* _KERNEL */ 466 467 #endif /* !_NETINET6_ND6_H_ */ 468
Indexes created Sun Sep 28 07:09:56 GMT 2025