1 /* $FreeBSD: src/sys/netinet6/nd6.h,v 1.2.2.5 2002/04/28 05:40:27 suz Exp $ */ 2 /* $DragonFly: src/sys/netinet6/nd6.h,v 1.8 2006/09/03 18:52:29 dillon Exp $ */ 3 /* $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef _NETINET6_ND6_H_ 35 #define _NETINET6_ND6_H_ 36 37 /* see net/route.h, or net/if_inarp.h */ 38 #ifndef RTF_ANNOUNCE 39 #define RTF_ANNOUNCE RTF_PROTO2 40 #endif 41 42 #ifndef _SYS_TYPES_H_ 43 #include <sys/types.h> 44 #endif 45 #ifndef _SYS_QUEUE_H_ 46 #include <sys/queue.h> 47 #endif 48 #ifndef _SYS_CALLOUT_H_ 49 #include <sys/callout.h> 50 #endif 51 #ifndef _NET_IF_H_ 52 #include <net/if.h> 53 #endif 54 #ifndef _NETINET_IN_H_ 55 #include <netinet/in.h> 56 #endif 57 #ifndef _NETINET6_IN6_VAR_H_ 58 #include <netinet6/in6_var.h> 59 #endif 60 #ifndef _SYS_MUTEX_H_ 61 #include <sys/mutex.h> 62 #endif 63 64 struct llinfo_nd6 { 65 struct llinfo_nd6 *ln_next; 66 struct llinfo_nd6 *ln_prev; 67 struct rtentry *ln_rt; 68 struct mbuf *ln_hold; /* last packet until resolved/timeout */ 69 long ln_asked; /* number of queries already sent for this addr */ 70 u_long ln_expire; /* lifetime for NDP state transition */ 71 short ln_state; /* reachability state */ 72 short ln_router; /* 2^0: ND6 router bit */ 73 int ln_byhint; /* # of times we made it reachable by UL hint */ 74 }; 75 76 #define ND6_LLINFO_NOSTATE -2 77 #define ND6_LLINFO_WAITDELETE -1 78 #define ND6_LLINFO_INCOMPLETE 0 79 #define ND6_LLINFO_REACHABLE 1 80 #define ND6_LLINFO_STALE 2 81 #define ND6_LLINFO_DELAY 3 82 #define ND6_LLINFO_PROBE 4 83 84 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 85 86 struct nd_ifinfo { 87 u_int32_t linkmtu; /* LinkMTU */ 88 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 89 u_int32_t basereachable; /* BaseReachableTime */ 90 u_int32_t reachable; /* Reachable Time */ 91 u_int32_t retrans; /* Retrans Timer */ 92 u_int32_t flags; /* Flags (ND6_IFF_*) */ 93 int recalctm; /* BaseReacable re-calculation timer */ 94 u_int8_t chlim; /* CurHopLimit */ 95 u_int8_t reserved; /* reserved 0 */ 96 u_int8_t initialized; /* Flag to see the entry is initialized */ 97 /* the following 3 members are for privacy extension for addrconf */ 98 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 99 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 100 u_int8_t randomid[8]; /* current random ID */ 101 }; 102 103 #define ND6_IFF_PERFORMNUD 0x1 104 #define ND6_IFF_ACCEPT_RTADV 0x2 105 #define ND6_IFF_AUTO_LINKLOCAL 0x4 106 #define ND6_IFF_NO_DAD 0x8 107 108 #ifdef _KERNEL 109 #define ND_IFINFO(ifp) \ 110 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 111 #define IN6_LINKMTU(ifp) \ 112 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 113 ? ND_IFINFO(ifp)->linkmtu \ 114 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ 115 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) 116 #endif 117 118 struct in6_nbrinfo { 119 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 120 struct in6_addr addr; /* IPv6 address of the neighbor */ 121 long asked; /* number of queries already sent for this addr */ 122 int isrouter; /* if it acts as a router */ 123 int state; /* reachability state */ 124 int expire; /* lifetime for NDP state transition */ 125 }; 126 127 #define DRLSTSIZ 10 128 #define PRLSTSIZ 10 129 struct in6_drlist { 130 char ifname[IFNAMSIZ]; 131 struct { 132 struct in6_addr rtaddr; 133 u_char flags; 134 u_short rtlifetime; 135 u_long expire; 136 u_short if_index; 137 } defrouter[DRLSTSIZ]; 138 }; 139 140 struct in6_defrouter { 141 struct sockaddr_in6 rtaddr; 142 u_char flags; 143 u_short rtlifetime; 144 u_long expire; 145 u_short if_index; 146 }; 147 148 struct in6_prlist { 149 char ifname[IFNAMSIZ]; 150 struct { 151 struct in6_addr prefix; 152 struct prf_ra raflags; 153 u_char prefixlen; 154 u_char origin; 155 u_int32_t vltime; 156 u_int32_t pltime; 157 time_t expire; 158 u_short if_index; 159 u_short advrtrs; /* number of advertisement routers */ 160 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 161 } prefix[PRLSTSIZ]; 162 }; 163 164 struct in6_prefix { 165 struct sockaddr_in6 prefix; 166 struct prf_ra raflags; 167 u_char prefixlen; 168 u_char origin; 169 u_long vltime; 170 u_long pltime; 171 u_long expire; 172 u_int32_t flags; 173 int refcnt; 174 u_short if_index; 175 u_short advrtrs; /* number of advertisement routers */ 176 /* struct sockaddr_in6 advrtr[] */ 177 }; 178 179 #ifdef _KERNEL 180 struct in6_ondireq { 181 char ifname[IFNAMSIZ]; 182 struct { 183 u_int32_t linkmtu; /* LinkMTU */ 184 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 185 u_int32_t basereachable; /* BaseReachableTime */ 186 u_int32_t reachable; /* Reachable Time */ 187 u_int32_t retrans; /* Retrans Timer */ 188 u_int32_t flags; /* Flags */ 189 int recalctm; /* BaseReacable re-calculation timer */ 190 u_int8_t chlim; /* CurHopLimit */ 191 u_int8_t receivedra; 192 } ndi; 193 }; 194 #endif 195 196 struct in6_ndireq { 197 char ifname[IFNAMSIZ]; 198 struct nd_ifinfo ndi; 199 }; 200 201 struct in6_ndifreq { 202 char ifname[IFNAMSIZ]; 203 u_long ifindex; 204 }; 205 206 /* Prefix status */ 207 #define NDPRF_ONLINK 0x1 208 #define NDPRF_DETACHED 0x2 209 210 /* protocol constants */ 211 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 212 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 213 #define MAX_RTR_SOLICITATIONS 3 214 215 #define ND6_INFINITE_LIFETIME 0xffffffff 216 217 #ifdef _KERNEL 218 /* node constants */ 219 #define MAX_REACHABLE_TIME 3600000 /* msec */ 220 #define REACHABLE_TIME 30000 /* msec */ 221 #define RETRANS_TIMER 1000 /* msec */ 222 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 223 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 224 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ 225 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ 226 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ 227 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ 228 #define ND_COMPUTE_RTIME(x) \ 229 (((MIN_RANDOM_FACTOR * (x >> 10)) + (krandom() & \ 230 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 231 232 TAILQ_HEAD(nd_drhead, nd_defrouter); 233 struct nd_defrouter { 234 TAILQ_ENTRY(nd_defrouter) dr_entry; 235 struct in6_addr rtaddr; 236 u_char flags; /* flags on RA message */ 237 u_short rtlifetime; 238 u_long expire; 239 u_long advint; /* Mobile IPv6 addition (milliseconds) */ 240 u_long advint_expire; /* Mobile IPv6 addition */ 241 int advints_lost; /* Mobile IPv6 addition */ 242 struct ifnet *ifp; 243 }; 244 245 struct nd_prefix { 246 struct ifnet *ndpr_ifp; 247 LIST_ENTRY(nd_prefix) ndpr_entry; 248 struct sockaddr_in6 ndpr_prefix; /* prefix */ 249 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 250 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 251 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 252 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 253 time_t ndpr_expire; /* expiration time of the prefix */ 254 time_t ndpr_preferred; /* preferred time of the prefix */ 255 struct prf_ra ndpr_flags; 256 u_int32_t ndpr_stateflags; /* actual state flags */ 257 /* list of routers that advertise the prefix: */ 258 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 259 u_char ndpr_plen; 260 int ndpr_refcnt; /* reference couter from addresses */ 261 }; 262 263 #define ndpr_next ndpr_entry.le_next 264 265 #define ndpr_raf ndpr_flags 266 #define ndpr_raf_onlink ndpr_flags.onlink 267 #define ndpr_raf_auto ndpr_flags.autonomous 268 269 /* 270 * We keep expired prefix for certain amount of time, for validation purposes. 271 * 1800s = MaxRtrAdvInterval 272 */ 273 #define NDPR_KEEP_EXPIRED (1800 * 2) 274 275 /* 276 * Message format for use in obtaining information about prefixes 277 * from inet6 sysctl function 278 */ 279 struct inet6_ndpr_msghdr { 280 u_short inpm_msglen; /* to skip over non-understood messages */ 281 u_char inpm_version; /* future binary compatibility */ 282 u_char inpm_type; /* message type */ 283 struct in6_addr inpm_prefix; 284 u_long prm_vltim; 285 u_long prm_pltime; 286 u_long prm_expire; 287 u_long prm_preferred; 288 struct in6_prflags prm_flags; 289 u_short prm_index; /* index for associated ifp */ 290 u_char prm_plen; /* length of prefix in bits */ 291 }; 292 293 #define prm_raf_onlink prm_flags.prf_ra.onlink 294 #define prm_raf_auto prm_flags.prf_ra.autonomous 295 296 #define prm_statef_onlink prm_flags.prf_state.onlink 297 298 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 299 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 300 301 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 302 303 struct nd_pfxrouter { 304 LIST_ENTRY(nd_pfxrouter) pfr_entry; 305 #define pfr_next pfr_entry.le_next 306 struct nd_defrouter *router; 307 }; 308 309 LIST_HEAD(nd_prhead, nd_prefix); 310 311 /* nd6.c */ 312 extern int nd6_prune; 313 extern int nd6_delay; 314 extern int nd6_umaxtries; 315 extern int nd6_mmaxtries; 316 extern int nd6_useloopback; 317 extern int nd6_maxnudhint; 318 extern int nd6_gctimer; 319 extern struct llinfo_nd6 llinfo_nd6; 320 extern struct nd_ifinfo *nd_ifinfo; 321 extern struct nd_drhead nd_defrouter; 322 extern struct nd_prhead nd_prefix; 323 extern struct mtx nd6_mtx; 324 extern int nd6_debug; 325 extern int nd6_onlink_ns_rfc4861; 326 327 #define nd6log(x) do { if (nd6_debug) log x; } while (0) 328 329 /* nd6_rtr.c */ 330 extern int nd6_defifindex; 331 extern int ip6_desync_factor; /* seconds */ 332 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */ 333 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */ 334 extern int ip6_temp_regen_advance; /* seconds */ 335 336 union nd_opts { 337 struct nd_opt_hdr *nd_opt_array[9]; /* max = home agent info */ 338 struct { 339 struct nd_opt_hdr *zero; 340 struct nd_opt_hdr *src_lladdr; 341 struct nd_opt_hdr *tgt_lladdr; 342 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 343 struct nd_opt_rd_hdr *rh; 344 struct nd_opt_mtu *mtu; 345 struct nd_opt_hdr *six; 346 struct nd_opt_advint *adv; 347 struct nd_opt_hai *hai; 348 struct nd_opt_hdr *search; /* multiple opts */ 349 struct nd_opt_hdr *last; /* multiple opts */ 350 int done; 351 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 352 } nd_opt_each; 353 }; 354 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 355 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 356 #define nd_opts_pi nd_opt_each.pi_beg 357 #define nd_opts_pi_end nd_opt_each.pi_end 358 #define nd_opts_rh nd_opt_each.rh 359 #define nd_opts_mtu nd_opt_each.mtu 360 #define nd_opts_adv nd_opt_each.adv 361 #define nd_opts_hai nd_opt_each.hai 362 #define nd_opts_search nd_opt_each.search 363 #define nd_opts_last nd_opt_each.last 364 #define nd_opts_done nd_opt_each.done 365 366 /* XXX: need nd6_var.h?? */ 367 /* nd6.c */ 368 void nd6_init (void); 369 void nd6_timer_init(void); 370 struct nd_ifinfo *nd6_ifattach (struct ifnet *); 371 void nd6_ifdetach (struct nd_ifinfo *); 372 int nd6_is_addr_neighbor (struct sockaddr_in6 *, struct ifnet *); 373 void nd6_option_init (void *, int, union nd_opts *); 374 struct nd_opt_hdr *nd6_option (union nd_opts *); 375 int nd6_options (union nd_opts *); 376 struct rtentry *nd6_lookup (struct in6_addr *, int, struct ifnet *); 377 void nd6_setmtu (struct ifnet *); 378 void nd6_purge (struct ifnet *); 379 struct llinfo_nd6 *nd6_free (struct rtentry *); 380 void nd6_nud_hint (struct rtentry *, struct in6_addr *, int); 381 int nd6_resolve(struct ifnet *, struct rtentry *, 382 struct mbuf *, struct sockaddr *, u_char *); 383 void nd6_rtrequest (int, struct rtentry *); 384 int nd6_ioctl (u_long, caddr_t, struct ifnet *); 385 struct rtentry *nd6_cache_lladdr (struct ifnet *, struct in6_addr *, 386 char *, int, int, int); 387 int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, 388 struct sockaddr_in6 *, struct rtentry *); 389 int nd6_need_cache (struct ifnet *); 390 391 /* nd6_nbr.c */ 392 void nd6_na_input (struct mbuf *, int, int); 393 void nd6_na_output (struct ifnet *, const struct in6_addr *, 394 const struct in6_addr *, u_long, int, struct sockaddr *); 395 void nd6_ns_input (struct mbuf *, int, int); 396 void nd6_ns_output (struct ifnet *, const struct in6_addr *, 397 const struct in6_addr *, struct llinfo_nd6 *, int); 398 caddr_t nd6_ifptomac (struct ifnet *); 399 void nd6_dad_start (struct ifaddr *, int *); 400 void nd6_dad_stop (struct ifaddr *); 401 402 /* nd6_rtr.c */ 403 void nd6_rs_input (struct mbuf *, int, int); 404 void nd6_ra_input (struct mbuf *, int, int); 405 void prelist_del (struct nd_prefix *); 406 void defrouter_addreq (struct nd_defrouter *); 407 void defrouter_delreq (struct nd_defrouter *, int); 408 void defrouter_select (void); 409 void defrtrlist_del (struct nd_defrouter *); 410 void prelist_remove (struct nd_prefix *); 411 int prelist_update(struct nd_prefix *, struct nd_defrouter *, 412 struct mbuf *); 413 int nd6_prelist_add(struct nd_prefix *, struct nd_defrouter *, 414 struct nd_prefix **); 415 int nd6_prefix_onlink (struct nd_prefix *); 416 int nd6_prefix_offlink (struct nd_prefix *); 417 void pfxlist_onlink_check (void); 418 struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *); 419 struct nd_prefix *nd6_prefix_lookup (struct nd_prefix *); 420 int in6_init_prefix_ltimes (struct nd_prefix *); 421 void rt6_flush (struct in6_addr *, struct ifnet *); 422 int nd6_setdefaultiface (int); 423 int in6_tmpifadd (const struct in6_ifaddr *, int); 424 425 #endif /* _KERNEL */ 426 427 #endif /* _NETINET6_ND6_H_ */ 428