1 /*!\file netinet6/nd6.h
2 * IPv6 Neighbor Discovery.
5 /* $FreeBSD: src/sys/netinet6/nd6.h,v 1.10 2002/04/19 04:46:23 suz Exp $ */
6 /* $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $ */
9 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the project nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #ifndef _NETINET6_ND6_H_
38 #define _NETINET6_ND6_H_
40 /* see net/route.h, or net/if_inarp.h */
42 #define RTF_ANNOUNCE RTF_PROTO2
45 #include <sys/queue.h>
46 #include <sys/callout.h>
49 struct llinfo_nd6 *ln_next;
50 struct llinfo_nd6 *ln_prev;
51 struct rtentry *ln_rt;
52 struct mbuf *ln_hold; /* last packet until resolved/timeout */
53 long ln_asked; /* number of queries already sent for this addr */
54 u_long ln_expire; /* lifetime for NDP state transition */
55 short ln_state; /* reachability state */
56 short ln_router; /* 2^0: ND6 router bit */
57 int ln_byhint; /* # of times we made it reachable by UL hint */
60 #define ND6_LLINFO_NOSTATE -2
62 * We don't need the WAITDELETE state any more, but we keep the definition
63 * in a comment line instead of removing it. This is necessary to avoid
64 * unintentionally reusing the value for another purpose, which might
65 * affect backward compatibility with old applications.
66 * (20000711 jinmei@kame.net)
68 /* #define ND6_LLINFO_WAITDELETE -1 */
69 #define ND6_LLINFO_INCOMPLETE 0
70 #define ND6_LLINFO_REACHABLE 1
71 #define ND6_LLINFO_STALE 2
72 #define ND6_LLINFO_DELAY 3
73 #define ND6_LLINFO_PROBE 4
75 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE)
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 */
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 */
93 #define ND6_IFF_PERFORMNUD 0x1
96 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */
97 struct in6_addr addr; /* IPv6 address of the neighbor */
98 long asked; /* number of queries already sent for this addr */
99 int isrouter; /* if it acts as a router */
100 int state; /* reachability state */
101 int expire; /* lifetime for NDP state transition */
107 char ifname[IFNAMSIZ];
109 struct in6_addr rtaddr;
114 } defrouter[DRLSTSIZ];
117 struct in6_defrouter {
118 struct sockaddr_in6 rtaddr;
126 char ifname[IFNAMSIZ];
128 struct in6_addr prefix;
129 struct prf_ra raflags;
136 u_short advrtrs; /* number of advertisement routers */
137 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
142 struct sockaddr_in6 prefix;
143 struct prf_ra raflags;
152 u_short advrtrs; /* number of advertisement routers */
153 /* struct sockaddr_in6 advrtr[] */
158 char ifname[IFNAMSIZ];
160 u_int32_t linkmtu; /* LinkMTU */
161 u_int32_t maxmtu; /* Upper bound of LinkMTU */
162 u_int32_t basereachable; /* BaseReachableTime */
163 u_int32_t reachable; /* Reachable Time */
164 u_int32_t retrans; /* Retrans Timer */
165 u_int32_t flags; /* Flags */
166 int recalctm; /* BaseReacable re-calculation timer */
167 u_int8_t chlim; /* CurHopLimit */
174 char ifname[IFNAMSIZ];
175 struct nd_ifinfo ndi;
179 char ifname[IFNAMSIZ];
184 #define NDPRF_ONLINK 0x1
185 #define NDPRF_DETACHED 0x2
187 /* protocol constants */
188 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */
189 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */
190 #define MAX_RTR_SOLICITATIONS 3
192 #define ND6_INFINITE_LIFETIME 0xffffffff
196 #define MAX_REACHABLE_TIME 3600000 /* msec */
197 #define REACHABLE_TIME 30000 /* msec */
198 #define RETRANS_TIMER 1000 /* msec */
199 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */
200 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */
201 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */
202 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */
203 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */
204 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */
205 #define ND_COMPUTE_RTIME(x) \
206 (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \
207 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
209 TAILQ_HEAD(nd_drhead, nd_defrouter);
210 struct nd_defrouter {
211 TAILQ_ENTRY(nd_defrouter) dr_entry;
212 struct in6_addr rtaddr;
213 u_char flags; /* flags on RA message */
216 u_long advint; /* Mobile IPv6 addition (milliseconds) */
217 u_long advint_expire; /* Mobile IPv6 addition */
218 int advints_lost; /* Mobile IPv6 addition */
223 struct ifnet *ndpr_ifp;
224 LIST_ENTRY(nd_prefix) ndpr_entry;
225 struct sockaddr_in6 ndpr_prefix; /* prefix */
226 struct in6_addr ndpr_mask; /* netmask derived from the prefix */
227 struct in6_addr ndpr_addr; /* address that is derived from the prefix */
228 u_int32_t ndpr_vltime; /* advertised valid lifetime */
229 u_int32_t ndpr_pltime; /* advertised preferred lifetime */
230 time_t ndpr_expire; /* expiration time of the prefix */
231 time_t ndpr_preferred; /* preferred time of the prefix */
232 struct prf_ra ndpr_flags;
233 u_int32_t ndpr_stateflags; /* actual state flags */
234 /* list of routers that advertise the prefix: */
235 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
237 int ndpr_refcnt; /* reference couter from addresses */
240 #define ndpr_next ndpr_entry.le_next
242 #define ndpr_raf ndpr_flags
243 #define ndpr_raf_onlink ndpr_flags.onlink
244 #define ndpr_raf_auto ndpr_flags.autonomous
247 * We keep expired prefix for certain amount of time, for validation purposes.
248 * 1800s = MaxRtrAdvInterval
250 #define NDPR_KEEP_EXPIRED (1800 * 2)
253 * Message format for use in obtaining information about prefixes
254 * from inet6 sysctl function
256 struct inet6_ndpr_msghdr {
257 u_short inpm_msglen; /* to skip over non-understood messages */
258 u_char inpm_version; /* future binary compatibility */
259 u_char inpm_type; /* message type */
260 struct in6_addr inpm_prefix;
264 u_long prm_preferred;
265 struct in6_prflags prm_flags;
266 u_short prm_index; /* index for associated ifp */
267 u_char prm_plen; /* length of prefix in bits */
270 #define prm_raf_onlink prm_flags.prf_ra.onlink
271 #define prm_raf_auto prm_flags.prf_ra.autonomous
273 #define prm_statef_onlink prm_flags.prf_state.onlink
275 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid
276 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd
278 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr))
279 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr))
281 struct nd_pfxrouter {
282 LIST_ENTRY(nd_pfxrouter) pfr_entry;
283 #define pfr_next pfr_entry.le_next
284 struct nd_defrouter *router;
287 LIST_HEAD(nd_prhead, nd_prefix);
290 extern int nd6_prune;
291 extern int nd6_delay;
292 extern int nd6_umaxtries;
293 extern int nd6_mmaxtries;
294 extern int nd6_useloopback;
295 extern int nd6_maxnudhint;
296 extern int nd6_gctimer;
297 extern struct llinfo_nd6 llinfo_nd6;
298 extern struct nd_ifinfo *nd_ifinfo;
299 extern struct nd_drhead nd_defrouter;
300 extern struct nd_prhead nd_prefix;
301 extern int nd6_debug;
303 #define nd6log(x) do { if (nd6_debug) log x; } while (0)
305 extern struct callout nd6_timer_ch;
308 extern int nd6_defifindex;
309 extern int ip6_desync_factor; /* seconds */
310 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */
311 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */
312 extern int ip6_temp_regen_advance; /* seconds */
315 struct nd_opt_hdr *nd_opt_array[9]; /* max = home agent info */
317 struct nd_opt_hdr *zero;
318 struct nd_opt_hdr *src_lladdr;
319 struct nd_opt_hdr *tgt_lladdr;
320 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
321 struct nd_opt_rd_hdr *rh;
322 struct nd_opt_mtu *mtu;
323 struct nd_opt_hdr *six;
324 struct nd_opt_advint *adv;
325 struct nd_opt_hai *hai;
326 struct nd_opt_hdr *search; /* multiple opts */
327 struct nd_opt_hdr *last; /* multiple opts */
329 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
332 #define nd_opts_src_lladdr nd_opt_each.src_lladdr
333 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr
334 #define nd_opts_pi nd_opt_each.pi_beg
335 #define nd_opts_pi_end nd_opt_each.pi_end
336 #define nd_opts_rh nd_opt_each.rh
337 #define nd_opts_mtu nd_opt_each.mtu
338 #define nd_opts_adv nd_opt_each.adv
339 #define nd_opts_hai nd_opt_each.hai
340 #define nd_opts_search nd_opt_each.search
341 #define nd_opts_last nd_opt_each.last
342 #define nd_opts_done nd_opt_each.done
344 /* XXX: need nd6_var.h?? */
346 void nd6_init __P((void));
347 void nd6_ifattach __P((struct ifnet *));
348 int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *));
349 void nd6_option_init __P((void *, int, union nd_opts *));
350 struct nd_opt_hdr *nd6_option __P((union nd_opts *));
351 int nd6_options __P((union nd_opts *));
352 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *));
353 void nd6_setmtu __P((struct ifnet *));
354 void nd6_timer __P((void *));
355 void nd6_purge __P((struct ifnet *));
356 struct llinfo_nd6 *nd6_free __P((struct rtentry *));
357 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int));
358 int nd6_resolve __P((struct ifnet *, struct rtentry *,
359 struct mbuf *, struct sockaddr *, u_char *));
360 void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *));
361 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *));
362 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *,
363 char *, int, int, int));
364 int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *,
365 struct sockaddr_in6 *, struct rtentry *));
366 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *,
367 struct sockaddr *, u_char *));
368 int nd6_need_cache __P((struct ifnet *));
371 void nd6_na_input __P((struct mbuf *, int, int));
372 void nd6_na_output __P((struct ifnet *, const struct in6_addr *,
373 const struct in6_addr *, u_long, int, struct sockaddr *));
374 void nd6_ns_input __P((struct mbuf *, int, int));
375 void nd6_ns_output __P((struct ifnet *, const struct in6_addr *,
376 const struct in6_addr *, struct llinfo_nd6 *, int));
377 caddr_t nd6_ifptomac __P((struct ifnet *));
378 void nd6_dad_start __P((struct ifaddr *, int *));
379 void nd6_dad_stop __P((struct ifaddr *));
380 void nd6_dad_duplicated __P((struct ifaddr *));
383 void nd6_rs_input __P((struct mbuf *, int, int));
384 void nd6_ra_input __P((struct mbuf *, int, int));
385 void prelist_del __P((struct nd_prefix *));
386 void defrouter_addreq __P((struct nd_defrouter *));
387 void defrouter_delreq __P((struct nd_defrouter *, int));
388 void defrouter_select __P((void));
389 void defrtrlist_del __P((struct nd_defrouter *));
390 void prelist_remove __P((struct nd_prefix *));
391 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *,
393 int nd6_prelist_add __P((struct nd_prefix *, struct nd_defrouter *,
394 struct nd_prefix **));
395 int nd6_prefix_onlink __P((struct nd_prefix *));
396 int nd6_prefix_offlink __P((struct nd_prefix *));
397 void pfxlist_onlink_check __P((void));
398 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *,
400 struct nd_prefix *nd6_prefix_lookup __P((struct nd_prefix *));
401 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr));
402 void rt6_flush __P((struct in6_addr *, struct ifnet *));
403 int nd6_setdefaultiface __P((int));
404 int in6_tmpifadd __P((const struct in6_ifaddr *, int));
408 #endif /* _NETINET6_ND6_H_ */