nd6.h revision 1.49
1 /* $NetBSD: nd6.h,v 1.49 2007/08/07 04:35:43 dyoung 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 /* 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 llinfo_nd6 { 45 struct llinfo_nd6 *ln_next; 46 struct llinfo_nd6 *ln_prev; 47 struct rtentry *ln_rt; 48 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 49 long ln_asked; /* number of queries already sent for this addr */ 50 u_long ln_expire; /* lifetime for NDP state transition */ 51 short ln_state; /* reachability state */ 52 short ln_router; /* 2^0: ND6 router bit */ 53 int ln_byhint; /* # of times we made it reachable by UL hint */ 54 55 long ln_ntick; 56 struct callout ln_timer_ch; 57 }; 58 59 #define ND6_LLINFO_NOSTATE -2 60 /* 61 * We don't need the WAITDELETE state any more, but we keep the definition 62 * in a comment line instead of removing it. This is necessary to avoid 63 * unintentionally reusing the value for another purpose, which might 64 * affect backward compatibility with old applications. 65 * (20000711 jinmei (at) kame.net) 66 */ 67 /* #define ND6_LLINFO_WAITDELETE -1 */ 68 #define ND6_LLINFO_INCOMPLETE 0 69 #define ND6_LLINFO_REACHABLE 1 70 #define ND6_LLINFO_STALE 2 71 #define ND6_LLINFO_DELAY 3 72 #define ND6_LLINFO_PROBE 4 73 74 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 75 #define ND6_LLINFO_PERMANENT(n) (((n)->ln_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE)) 76 77 struct nd_ifinfo { 78 u_int32_t linkmtu; /* LinkMTU */ 79 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 80 u_int32_t basereachable; /* BaseReachableTime */ 81 u_int32_t reachable; /* Reachable Time */ 82 u_int32_t retrans; /* Retrans Timer */ 83 u_int32_t flags; /* Flags */ 84 int recalctm; /* BaseReacable re-calculation timer */ 85 u_int8_t chlim; /* CurHopLimit */ 86 u_int8_t initialized; /* Flag to see the entry is initialized */ 87 /* the following 3 members are for privacy extension for addrconf */ 88 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 89 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 90 u_int8_t randomid[8]; /* current random ID */ 91 }; 92 93 #define ND6_IFF_PERFORMNUD 0x1 94 #define ND6_IFF_ACCEPT_RTADV 0x2 95 #define ND6_IFF_PREFER_SOURCE 0x4 /* XXX: not related to ND. */ 96 #define ND6_IFF_IFDISABLED 0x8 /* IPv6 operation is disabled due to 97 * DAD failure. (XXX: not ND-specific) 98 */ 99 100 #ifdef _KERNEL 101 #define ND_IFINFO(ifp) \ 102 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 103 #define IN6_LINKMTU(ifp) \ 104 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 105 ? ND_IFINFO(ifp)->linkmtu \ 106 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ 107 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) 108 #endif 109 110 struct in6_nbrinfo { 111 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 112 struct in6_addr addr; /* IPv6 address of the neighbor */ 113 long asked; /* number of queries already sent for this addr */ 114 int isrouter; /* if it acts as a router */ 115 int state; /* reachability state */ 116 int expire; /* lifetime for NDP state transition */ 117 }; 118 119 #define DRLSTSIZ 10 120 #define PRLSTSIZ 10 121 struct in6_drlist { 122 char ifname[IFNAMSIZ]; 123 struct { 124 struct in6_addr rtaddr; 125 u_char flags; 126 u_short rtlifetime; 127 u_long expire; 128 u_short if_index; 129 } defrouter[DRLSTSIZ]; 130 }; 131 132 struct in6_defrouter { 133 struct sockaddr_in6 rtaddr; 134 u_char flags; 135 u_short rtlifetime; 136 u_long expire; 137 u_short if_index; 138 }; 139 140 #ifdef _KERNEL 141 struct in6_oprlist { 142 char ifname[IFNAMSIZ]; 143 struct { 144 struct in6_addr prefix; 145 struct prf_ra raflags; 146 u_char prefixlen; 147 u_char origin; 148 u_long vltime; 149 u_long pltime; 150 u_long expire; 151 u_short if_index; 152 u_short advrtrs; /* number of advertisement routers */ 153 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 154 } prefix[PRLSTSIZ]; 155 }; 156 #endif 157 158 struct in6_prlist { 159 char ifname[IFNAMSIZ]; 160 struct { 161 struct in6_addr prefix; 162 struct prf_ra raflags; 163 u_char prefixlen; 164 u_char origin; 165 u_int32_t vltime; 166 u_int32_t pltime; 167 time_t expire; 168 u_short if_index; 169 u_short advrtrs; /* number of advertisement routers */ 170 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 171 } prefix[PRLSTSIZ]; 172 }; 173 174 struct in6_prefix { 175 struct sockaddr_in6 prefix; 176 struct prf_ra raflags; 177 u_char prefixlen; 178 u_char origin; 179 u_int32_t vltime; 180 u_int32_t pltime; 181 time_t expire; 182 u_int32_t flags; 183 int refcnt; 184 u_short if_index; 185 u_short advrtrs; /* number of advertisement routers */ 186 /* struct sockaddr_in6 advrtr[] */ 187 }; 188 189 #ifdef _KERNEL 190 struct in6_ondireq { 191 char ifname[IFNAMSIZ]; 192 struct { 193 u_int32_t linkmtu; /* LinkMTU */ 194 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 195 u_int32_t basereachable; /* BaseReachableTime */ 196 u_int32_t reachable; /* Reachable Time */ 197 u_int32_t retrans; /* Retrans Timer */ 198 u_int32_t flags; /* Flags */ 199 int recalctm; /* BaseReacable re-calculation timer */ 200 u_int8_t chlim; /* CurHopLimit */ 201 u_int8_t receivedra; 202 } ndi; 203 }; 204 #endif 205 206 struct in6_ndireq { 207 char ifname[IFNAMSIZ]; 208 struct nd_ifinfo ndi; 209 }; 210 211 struct in6_ndifreq { 212 char ifname[IFNAMSIZ]; 213 u_long ifindex; 214 }; 215 216 /* Prefix status */ 217 #define NDPRF_ONLINK 0x1 218 #define NDPRF_DETACHED 0x2 219 #define NDPRF_HOME 0x4 220 221 /* protocol constants */ 222 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 223 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 224 #define MAX_RTR_SOLICITATIONS 3 225 226 #define ND6_INFINITE_LIFETIME 0xffffffff 227 228 #ifdef _KERNEL 229 /* node constants */ 230 #define MAX_REACHABLE_TIME 3600000 /* msec */ 231 #define REACHABLE_TIME 30000 /* msec */ 232 #define RETRANS_TIMER 1000 /* msec */ 233 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 234 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 235 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 236 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 237 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 238 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 239 #define ND_COMPUTE_RTIME(x) \ 240 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ 241 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 242 243 TAILQ_HEAD(nd_drhead, nd_defrouter); 244 struct nd_defrouter { 245 TAILQ_ENTRY(nd_defrouter) dr_entry; 246 struct in6_addr rtaddr; 247 u_char flags; /* flags on RA message */ 248 u_short rtlifetime; 249 u_long expire; 250 struct ifnet *ifp; 251 int installed; /* is installed into kernel routing table */ 252 }; 253 254 struct nd_prefixctl { 255 struct ifnet *ndpr_ifp; 256 257 /* prefix */ 258 struct sockaddr_in6 ndpr_prefix; 259 u_char ndpr_plen; 260 261 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 262 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 263 264 struct prf_ra ndpr_flags; 265 }; 266 267 struct nd_prefix { 268 struct ifnet *ndpr_ifp; 269 LIST_ENTRY(nd_prefix) ndpr_entry; 270 struct sockaddr_in6 ndpr_prefix; /* prefix */ 271 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 272 273 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 274 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 275 276 time_t ndpr_expire; /* expiration time of the prefix */ 277 time_t ndpr_preferred; /* preferred time of the prefix */ 278 time_t ndpr_lastupdate; /* reception time of last advertisement */ 279 280 struct prf_ra ndpr_flags; 281 u_int32_t ndpr_stateflags; /* actual state flags */ 282 /* list of routers that advertise the prefix: */ 283 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 284 u_char ndpr_plen; 285 int ndpr_refcnt; /* reference couter from addresses */ 286 }; 287 288 #define ndpr_raf ndpr_flags 289 #define ndpr_raf_onlink ndpr_flags.onlink 290 #define ndpr_raf_auto ndpr_flags.autonomous 291 #define ndpr_raf_router ndpr_flags.router 292 293 /* 294 * Message format for use in obtaining information about prefixes 295 * from inet6 sysctl function 296 */ 297 struct inet6_ndpr_msghdr { 298 u_short inpm_msglen; /* to skip over non-understood messages */ 299 u_char inpm_version; /* future binary compatibility */ 300 u_char inpm_type; /* message type */ 301 struct in6_addr inpm_prefix; 302 u_long prm_vltim; 303 u_long prm_pltime; 304 u_long prm_expire; 305 u_long prm_preferred; 306 struct in6_prflags prm_flags; 307 u_short prm_index; /* index for associated ifp */ 308 u_char prm_plen; /* length of prefix in bits */ 309 }; 310 311 #define prm_raf_onlink prm_flags.prf_ra.onlink 312 #define prm_raf_auto prm_flags.prf_ra.autonomous 313 314 #define prm_statef_onlink prm_flags.prf_state.onlink 315 316 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 317 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 318 319 struct nd_pfxrouter { 320 LIST_ENTRY(nd_pfxrouter) pfr_entry; 321 struct nd_defrouter *router; 322 }; 323 324 LIST_HEAD(nd_prhead, nd_prefix); 325 326 #include <sys/mallocvar.h> 327 MALLOC_DECLARE(M_IP6NDP); 328 329 /* nd6.c */ 330 extern int nd6_prune; 331 extern int nd6_delay; 332 extern int nd6_umaxtries; 333 extern int nd6_mmaxtries; 334 extern int nd6_useloopback; 335 extern int nd6_maxnudhint; 336 extern int nd6_gctimer; 337 extern struct llinfo_nd6 llinfo_nd6; 338 extern struct nd_drhead nd_defrouter; 339 extern struct nd_prhead nd_prefix; 340 extern int nd6_debug; 341 342 #define nd6log(x) do { if (nd6_debug) log x; } while (/*CONSTCOND*/ 0) 343 344 extern struct callout nd6_timer_ch; 345 346 /* nd6_rtr.c */ 347 extern int nd6_defifindex; 348 extern int ip6_desync_factor; /* seconds */ 349 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ 350 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ 351 extern int ip6_temp_regen_advance; /* seconds */ 352 353 union nd_opts { 354 struct nd_opt_hdr *nd_opt_array[8]; 355 struct { 356 struct nd_opt_hdr *zero; 357 struct nd_opt_hdr *src_lladdr; 358 struct nd_opt_hdr *tgt_lladdr; 359 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 360 struct nd_opt_rd_hdr *rh; 361 struct nd_opt_mtu *mtu; 362 struct nd_opt_hdr *search; /* multiple opts */ 363 struct nd_opt_hdr *last; /* multiple opts */ 364 int done; 365 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 366 } nd_opt_each; 367 }; 368 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 369 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 370 #define nd_opts_pi nd_opt_each.pi_beg 371 #define nd_opts_pi_end nd_opt_each.pi_end 372 #define nd_opts_rh nd_opt_each.rh 373 #define nd_opts_mtu nd_opt_each.mtu 374 #define nd_opts_search nd_opt_each.search 375 #define nd_opts_last nd_opt_each.last 376 #define nd_opts_done nd_opt_each.done 377 378 /* XXX: need nd6_var.h?? */ 379 /* nd6.c */ 380 void nd6_init(void); 381 struct nd_ifinfo *nd6_ifattach(struct ifnet *); 382 void nd6_ifdetach(struct nd_ifinfo *); 383 int nd6_is_addr_neighbor(const struct sockaddr_in6 *, struct ifnet *); 384 void nd6_option_init(void *, int, union nd_opts *); 385 struct nd_opt_hdr *nd6_option(union nd_opts *); 386 int nd6_options(union nd_opts *); 387 struct rtentry *nd6_lookup(const struct in6_addr *, int, struct ifnet *); 388 void nd6_setmtu(struct ifnet *); 389 void nd6_llinfo_settimer(struct llinfo_nd6 *, long); 390 void nd6_timer(void *); 391 void nd6_purge(struct ifnet *); 392 void nd6_nud_hint(struct rtentry *, struct in6_addr *, int); 393 int nd6_resolve(struct ifnet *, struct rtentry *, 394 struct mbuf *, struct sockaddr *, u_char *); 395 void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 396 int nd6_ioctl(u_long, void *, struct ifnet *); 397 struct rtentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *, 398 char *, int, int, int); 399 int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, 400 const struct sockaddr_in6 *, struct rtentry *); 401 int nd6_storelladdr(const struct ifnet *, const struct rtentry *, struct mbuf *, 402 const struct sockaddr *, uint8_t *, size_t); 403 int nd6_sysctl(int, void *, size_t *, void *, size_t); 404 int nd6_need_cache(struct ifnet *); 405 void nd6_llinfo_release_pkts(struct llinfo_nd6 *, struct ifnet *, 406 struct rtentry *); 407 408 /* nd6_nbr.c */ 409 void nd6_na_input(struct mbuf *, int, int); 410 void nd6_na_output(struct ifnet *, const struct in6_addr *, 411 const struct in6_addr *, u_long, int, const struct sockaddr *); 412 void nd6_ns_input(struct mbuf *, int, int); 413 void nd6_ns_output(struct ifnet *, const struct in6_addr *, 414 const struct in6_addr *, struct llinfo_nd6 *, int); 415 void *nd6_ifptomac(struct ifnet *); 416 void nd6_dad_start(struct ifaddr *, int); 417 void nd6_dad_stop(struct ifaddr *); 418 void nd6_dad_duplicated(struct ifaddr *); 419 420 /* nd6_rtr.c */ 421 void nd6_rs_input(struct mbuf *, int, int); 422 void nd6_ra_input(struct mbuf *, int, int); 423 void prelist_del(struct nd_prefix *); 424 void defrouter_addreq(struct nd_defrouter *); 425 void defrouter_reset(void); 426 void defrouter_select(void); 427 void defrtrlist_del(struct nd_defrouter *); 428 void prelist_remove(struct nd_prefix *); 429 int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *, 430 struct nd_prefix **); 431 int nd6_prefix_onlink(struct nd_prefix *); 432 int nd6_prefix_offlink(struct nd_prefix *); 433 void pfxlist_onlink_check(void); 434 struct nd_defrouter *defrouter_lookup(const struct in6_addr *, struct ifnet *); 435 struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *); 436 int in6_ifdel(struct ifnet *, struct in6_addr *); 437 void rt6_flush(struct in6_addr *, struct ifnet *); 438 int nd6_setdefaultiface(int); 439 int in6_tmpifadd(const struct in6_ifaddr *, int, int); 440 441 #endif /* _KERNEL */ 442 443 #endif /* !_NETINET6_ND6_H_ */ 444
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