nd6.h revision 1.26
1 /* $NetBSD: nd6.h,v 1.26 2002/05/29 07:53:42 itojun Exp $ */ 2 /* $KAME: nd6.h,v 1.52 2001/02/19 04:40:37 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 56 #define ND6_LLINFO_NOSTATE -2 57 /* 58 * We don't need the WAITDELETE state any more, but we keep the definition 59 * in a comment line instead of removing it. This is necessary to avoid 60 * unintentionally reusing the value for another purpose, which might 61 * affect backward compatibility with old applications. 62 * (20000711 jinmei (at) kame.net) 63 */ 64 /* #define ND6_LLINFO_WAITDELETE -1 */ 65 #define ND6_LLINFO_INCOMPLETE 0 66 #define ND6_LLINFO_REACHABLE 1 67 #define ND6_LLINFO_STALE 2 68 #define ND6_LLINFO_DELAY 3 69 #define ND6_LLINFO_PROBE 4 70 71 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) 72 73 /* 74 * Since the granularity of our retransmission timer is seconds, we should 75 * ensure that a positive timer value will be mapped to at least one second. 76 */ 77 #define ND6_RETRANS_SEC(r) (((r) + 999) / 1000) 78 79 struct nd_ifinfo { 80 u_int32_t linkmtu; /* LinkMTU */ 81 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 82 u_int32_t basereachable; /* BaseReachableTime */ 83 u_int32_t reachable; /* Reachable Time */ 84 u_int32_t retrans; /* Retrans Timer */ 85 u_int32_t flags; /* Flags */ 86 int recalctm; /* BaseReacable re-calculation timer */ 87 u_int8_t chlim; /* CurHopLimit */ 88 u_int8_t initialized; /* Flag to see the entry is initialized */ 89 #define receivedra initialized /* obsoleted */ 90 /* the following 3 members are for privacy extension for addrconf */ 91 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ 92 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ 93 u_int8_t randomid[8]; /* current random ID */ 94 }; 95 96 #define ND6_IFF_PERFORMNUD 0x1 97 98 #ifdef _KERNEL 99 #define ND_IFINFO(ifp) \ 100 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) 101 #define IN6_LINKMTU(ifp) \ 102 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ 103 ? ND_IFINFO(ifp)->linkmtu : (ifp)->if_mtu) 104 #endif 105 106 struct in6_nbrinfo { 107 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ 108 struct in6_addr addr; /* IPv6 address of the neighbor */ 109 long asked; /* number of queries already sent for this addr */ 110 int isrouter; /* if it acts as a router */ 111 int state; /* reachability state */ 112 int expire; /* lifetime for NDP state transition */ 113 }; 114 115 #define DRLSTSIZ 10 116 #define PRLSTSIZ 10 117 struct in6_drlist { 118 char ifname[IFNAMSIZ]; 119 struct { 120 struct in6_addr rtaddr; 121 u_char flags; 122 u_short rtlifetime; 123 u_long expire; 124 u_short if_index; 125 } defrouter[DRLSTSIZ]; 126 }; 127 128 struct in6_prlist { 129 char ifname[IFNAMSIZ]; 130 struct { 131 struct in6_addr prefix; 132 struct prf_ra raflags; 133 u_char prefixlen; 134 u_char origin; 135 u_long vltime; 136 u_long pltime; 137 u_long expire; 138 u_short if_index; 139 u_short advrtrs; /* number of advertisement routers */ 140 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ 141 } prefix[PRLSTSIZ]; 142 }; 143 144 #ifdef _KERNEL 145 struct in6_ondireq { 146 char ifname[IFNAMSIZ]; 147 struct { 148 u_int32_t linkmtu; /* LinkMTU */ 149 u_int32_t maxmtu; /* Upper bound of LinkMTU */ 150 u_int32_t basereachable; /* BaseReachableTime */ 151 u_int32_t reachable; /* Reachable Time */ 152 u_int32_t retrans; /* Retrans Timer */ 153 u_int32_t flags; /* Flags */ 154 int recalctm; /* BaseReacable re-calculation timer */ 155 u_int8_t chlim; /* CurHopLimit */ 156 u_int8_t receivedra; 157 } ndi; 158 }; 159 #endif 160 161 struct in6_ndireq { 162 char ifname[IFNAMSIZ]; 163 struct nd_ifinfo ndi; 164 }; 165 166 struct in6_ndifreq { 167 char ifname[IFNAMSIZ]; 168 u_long ifindex; 169 }; 170 171 172 /* protocol constants */ 173 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ 174 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ 175 #define MAX_RTR_SOLICITATIONS 3 176 177 #define ND6_INFINITE_LIFETIME 0xffffffff 178 179 #ifdef _KERNEL 180 /* node constants */ 181 #define MAX_REACHABLE_TIME 3600000 /* msec */ 182 #define REACHABLE_TIME 30000 /* msec */ 183 #define RETRANS_TIMER 1000 /* msec */ 184 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ 185 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ 186 #define ND_COMPUTE_RTIME(x) \ 187 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ 188 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) 189 190 TAILQ_HEAD(nd_drhead, nd_defrouter); 191 struct nd_defrouter { 192 TAILQ_ENTRY(nd_defrouter) dr_entry; 193 struct in6_addr rtaddr; 194 u_char flags; 195 u_short rtlifetime; 196 u_long expire; 197 struct ifnet *ifp; 198 }; 199 200 struct nd_prefix { 201 struct ifnet *ndpr_ifp; 202 LIST_ENTRY(nd_prefix) ndpr_entry; 203 struct sockaddr_in6 ndpr_prefix; /* prefix */ 204 struct in6_addr ndpr_mask; /* netmask derived from the prefix */ 205 struct in6_addr ndpr_addr; /* address that is derived from the prefix */ 206 u_int32_t ndpr_vltime; /* advertised valid lifetime */ 207 u_int32_t ndpr_pltime; /* advertised preferred lifetime */ 208 time_t ndpr_expire; /* expiration time of the prefix */ 209 time_t ndpr_preferred; /* preferred time of the prefix */ 210 struct prf_ra ndpr_flags; 211 /* list of routers that advertise the prefix: */ 212 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; 213 u_char ndpr_plen; 214 struct ndpr_stateflags { 215 /* if this prefix can be regarded as on-link */ 216 u_char onlink : 1; 217 } ndpr_stateflags; 218 }; 219 220 #define ndpr_next ndpr_entry.le_next 221 222 #define ndpr_raf ndpr_flags 223 #define ndpr_raf_onlink ndpr_flags.onlink 224 #define ndpr_raf_auto ndpr_flags.autonomous 225 226 #define ndpr_statef_onlink ndpr_stateflags.onlink 227 #define ndpr_statef_addmark ndpr_stateflags.addmark 228 229 /* 230 * We keep expired prefix for certain amount of time, for validation purposes. 231 * 1800s = MaxRtrAdvInterval 232 */ 233 #define NDPR_KEEP_EXPIRED (1800 * 2) 234 235 /* 236 * Message format for use in obtaining information about prefixes 237 * from inet6 sysctl function 238 */ 239 struct inet6_ndpr_msghdr { 240 u_short inpm_msglen; /* to skip over non-understood messages */ 241 u_char inpm_version; /* future binary compatibility */ 242 u_char inpm_type; /* message type */ 243 struct in6_addr inpm_prefix; 244 u_long prm_vltim; 245 u_long prm_pltime; 246 u_long prm_expire; 247 u_long prm_preferred; 248 struct in6_prflags prm_flags; 249 u_short prm_index; /* index for associated ifp */ 250 u_char prm_plen; /* length of prefix in bits */ 251 }; 252 253 #define prm_raf_onlink prm_flags.prf_ra.onlink 254 #define prm_raf_auto prm_flags.prf_ra.autonomous 255 256 #define prm_statef_onlink prm_flags.prf_state.onlink 257 258 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid 259 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd 260 261 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr)) 262 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr)) 263 264 struct nd_pfxrouter { 265 LIST_ENTRY(nd_pfxrouter) pfr_entry; 266 #define pfr_next pfr_entry.le_next 267 struct nd_defrouter *router; 268 }; 269 270 LIST_HEAD(nd_prhead, nd_prefix); 271 272 /* nd6.c */ 273 extern int nd6_prune; 274 extern int nd6_delay; 275 extern int nd6_umaxtries; 276 extern int nd6_mmaxtries; 277 extern int nd6_useloopback; 278 extern int nd6_maxnudhint; 279 extern int nd6_gctimer; 280 extern struct llinfo_nd6 llinfo_nd6; 281 extern struct nd_drhead nd_defrouter; 282 extern struct nd_prhead nd_prefix; 283 extern int nd6_debug; 284 285 #define nd6log(x) do { if (nd6_debug) log x; } while (0) 286 287 extern struct callout nd6_timer_ch; 288 289 /* nd6_rtr.c */ 290 extern int nd6_defifindex; 291 292 union nd_opts { 293 struct nd_opt_hdr *nd_opt_array[8]; 294 struct { 295 struct nd_opt_hdr *zero; 296 struct nd_opt_hdr *src_lladdr; 297 struct nd_opt_hdr *tgt_lladdr; 298 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ 299 struct nd_opt_rd_hdr *rh; 300 struct nd_opt_mtu *mtu; 301 struct nd_opt_hdr *search; /* multiple opts */ 302 struct nd_opt_hdr *last; /* multiple opts */ 303 int done; 304 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ 305 } nd_opt_each; 306 }; 307 #define nd_opts_src_lladdr nd_opt_each.src_lladdr 308 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr 309 #define nd_opts_pi nd_opt_each.pi_beg 310 #define nd_opts_pi_end nd_opt_each.pi_end 311 #define nd_opts_rh nd_opt_each.rh 312 #define nd_opts_mtu nd_opt_each.mtu 313 #define nd_opts_search nd_opt_each.search 314 #define nd_opts_last nd_opt_each.last 315 #define nd_opts_done nd_opt_each.done 316 317 /* XXX: need nd6_var.h?? */ 318 /* nd6.c */ 319 void nd6_init __P((void)); 320 struct nd_ifinfo *nd6_ifattach __P((struct ifnet *)); 321 void nd6_ifdetach __P((struct nd_ifinfo *)); 322 int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *)); 323 void nd6_option_init __P((void *, int, union nd_opts *)); 324 struct nd_opt_hdr *nd6_option __P((union nd_opts *)); 325 int nd6_options __P((union nd_opts *)); 326 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *)); 327 void nd6_setmtu __P((struct ifnet *, struct nd_ifinfo *)); 328 void nd6_timer __P((void *)); 329 void nd6_purge __P((struct ifnet *)); 330 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int)); 331 int nd6_resolve __P((struct ifnet *, struct rtentry *, 332 struct mbuf *, struct sockaddr *, u_char *)); 333 void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 334 void nd6_p2p_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *)); 335 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *)); 336 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *, 337 char *, int, int, int)); 338 int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *, 339 struct sockaddr_in6 *, struct rtentry *)); 340 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *, 341 struct sockaddr *, u_char *)); 342 int nd6_need_cache __P((struct ifnet *)); 343 344 /* nd6_nbr.c */ 345 void nd6_na_input __P((struct mbuf *, int, int)); 346 void nd6_na_output __P((struct ifnet *, const struct in6_addr *, 347 const struct in6_addr *, u_long, int, struct sockaddr *)); 348 void nd6_ns_input __P((struct mbuf *, int, int)); 349 void nd6_ns_output __P((struct ifnet *, const struct in6_addr *, 350 const struct in6_addr *, struct llinfo_nd6 *, int)); 351 caddr_t nd6_ifptomac __P((struct ifnet *)); 352 void nd6_dad_start __P((struct ifaddr *, int *)); 353 void nd6_dad_stop __P((struct ifaddr *)); 354 void nd6_dad_duplicated __P((struct ifaddr *)); 355 356 /* nd6_rtr.c */ 357 void nd6_rs_input __P((struct mbuf *, int, int)); 358 void nd6_ra_input __P((struct mbuf *, int, int)); 359 void prelist_del __P((struct nd_prefix *)); 360 void defrouter_addreq __P((struct nd_defrouter *)); 361 void defrouter_delreq __P((struct nd_defrouter *, int)); 362 void defrouter_select __P((void)); 363 void defrtrlist_del __P((struct nd_defrouter *)); 364 void prelist_remove __P((struct nd_prefix *)); 365 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *, 366 struct mbuf *)); 367 void pfxlist_onlink_check __P((void)); 368 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *, 369 struct ifnet *)); 370 int in6_ifdel __P((struct ifnet *, struct in6_addr *)); 371 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr)); 372 void rt6_flush __P((struct in6_addr *, struct ifnet *)); 373 int nd6_setdefaultiface __P((int)); 374 375 #endif /* _KERNEL */ 376 377 #endif /* _NETINET6_ND6_H_ */ 378
Indexes created Sun Sep 28 07:09:56 GMT 2025