2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 * $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $
33 #ifndef _NETINET6_ND6_H_
34 #define _NETINET6_ND6_H_
36 /* see net/route.h, or net/if_inarp.h */
38 #define RTF_ANNOUNCE RTF_PROTO2
41 #include <sys/queue.h>
42 #include <sys/callout.h>
46 #define ND6_LLINFO_NOSTATE -2
48 * We don't need the WAITDELETE state any more, but we keep the definition
49 * in a comment line instead of removing it. This is necessary to avoid
50 * unintentionally reusing the value for another purpose, which might
51 * affect backward compatibility with old applications.
52 * (20000711 jinmei@kame.net)
54 /* #define ND6_LLINFO_WAITDELETE -1 */
55 #define ND6_LLINFO_INCOMPLETE 0
56 #define ND6_LLINFO_REACHABLE 1
57 #define ND6_LLINFO_STALE 2
58 #define ND6_LLINFO_DELAY 3
59 #define ND6_LLINFO_PROBE 4
61 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE)
62 #define ND6_LLINFO_PERMANENT(n) (((n)->la_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE))
65 u_int32_t linkmtu; /* LinkMTU */
66 u_int32_t maxmtu; /* Upper bound of LinkMTU */
67 u_int32_t basereachable; /* BaseReachableTime */
68 u_int32_t reachable; /* Reachable Time */
69 u_int32_t retrans; /* Retrans Timer */
70 u_int32_t flags; /* Flags */
71 int recalctm; /* BaseReacable re-calculation timer */
72 u_int8_t chlim; /* CurHopLimit */
73 u_int8_t initialized; /* Flag to see the entry is initialized */
74 /* the following 3 members are for privacy extension for addrconf */
75 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */
76 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */
77 u_int8_t randomid[8]; /* current random ID */
80 #define ND6_IFF_PERFORMNUD 0x1
81 #define ND6_IFF_ACCEPT_RTADV 0x2
82 #define ND6_IFF_PREFER_SOURCE 0x4 /* Not used in FreeBSD. */
83 #define ND6_IFF_IFDISABLED 0x8 /* IPv6 operation is disabled due to
84 * DAD failure. (XXX: not ND-specific)
86 #define ND6_IFF_DONT_SET_IFROUTE 0x10
87 #define ND6_IFF_AUTO_LINKLOCAL 0x20
88 #define ND6_IFF_NO_RADR 0x40
89 #define ND6_IFF_NO_PREFER_IFACE 0x80 /* XXX: not related to ND. */
90 #define ND6_IFF_IGNORELOOP 0x100
91 #define ND6_IFF_NO_DAD 0x200
93 #define ND6_CREATE LLE_CREATE
94 #define ND6_EXCLUSIVE LLE_EXCLUSIVE
97 #define ND_IFINFO(ifp) \
98 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo)
99 #define IN6_LINKMTU(ifp) \
100 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \
101 ? ND_IFINFO(ifp)->linkmtu \
102 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \
103 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu))
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 */
118 char ifname[IFNAMSIZ];
120 struct in6_addr rtaddr;
125 } defrouter[DRLSTSIZ];
128 struct in6_defrouter {
129 struct sockaddr_in6 rtaddr;
138 char ifname[IFNAMSIZ];
140 struct in6_addr prefix;
141 struct prf_ra raflags;
148 u_short advrtrs; /* number of advertisement routers */
149 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
155 char ifname[IFNAMSIZ];
157 struct in6_addr prefix;
158 struct prf_ra raflags;
165 u_short advrtrs; /* number of advertisement routers */
166 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
171 struct sockaddr_in6 prefix;
172 struct prf_ra raflags;
181 u_short advrtrs; /* number of advertisement routers */
182 /* struct sockaddr_in6 advrtr[] */
187 char ifname[IFNAMSIZ];
189 u_int32_t linkmtu; /* LinkMTU */
190 u_int32_t maxmtu; /* Upper bound of LinkMTU */
191 u_int32_t basereachable; /* BaseReachableTime */
192 u_int32_t reachable; /* Reachable Time */
193 u_int32_t retrans; /* Retrans Timer */
194 u_int32_t flags; /* Flags */
195 int recalctm; /* BaseReacable re-calculation timer */
196 u_int8_t chlim; /* CurHopLimit */
203 char ifname[IFNAMSIZ];
204 struct nd_ifinfo ndi;
208 char ifname[IFNAMSIZ];
213 #define NDPRF_ONLINK 0x1
214 #define NDPRF_DETACHED 0x2
216 /* protocol constants */
217 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */
218 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */
219 #define MAX_RTR_SOLICITATIONS 3
221 #define ND6_INFINITE_LIFETIME 0xffffffff
225 #define MAX_REACHABLE_TIME 3600000 /* msec */
226 #define REACHABLE_TIME 30000 /* msec */
227 #define RETRANS_TIMER 1000 /* msec */
228 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */
229 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */
230 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */
231 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */
232 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */
233 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */
234 #define ND_COMPUTE_RTIME(x) \
235 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
236 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
238 TAILQ_HEAD(nd_drhead, nd_defrouter);
239 struct nd_defrouter {
240 TAILQ_ENTRY(nd_defrouter) dr_entry;
241 struct in6_addr rtaddr;
242 u_char flags; /* flags on RA message */
246 int installed; /* is installed into kernel routing table */
249 struct nd_prefixctl {
250 struct ifnet *ndpr_ifp;
253 struct sockaddr_in6 ndpr_prefix;
256 u_int32_t ndpr_vltime; /* advertised valid lifetime */
257 u_int32_t ndpr_pltime; /* advertised preferred lifetime */
259 struct prf_ra ndpr_flags;
264 struct ifnet *ndpr_ifp;
265 LIST_ENTRY(nd_prefix) ndpr_entry;
266 struct sockaddr_in6 ndpr_prefix; /* prefix */
267 struct in6_addr ndpr_mask; /* netmask derived from the prefix */
269 u_int32_t ndpr_vltime; /* advertised valid lifetime */
270 u_int32_t ndpr_pltime; /* advertised preferred lifetime */
272 time_t ndpr_expire; /* expiration time of the prefix */
273 time_t ndpr_preferred; /* preferred time of the prefix */
274 time_t ndpr_lastupdate; /* reception time of last advertisement */
276 struct prf_ra ndpr_flags;
277 u_int32_t ndpr_stateflags; /* actual state flags */
278 /* list of routers that advertise the prefix: */
279 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
281 int ndpr_refcnt; /* reference couter from addresses */
284 #define ndpr_raf ndpr_flags
285 #define ndpr_raf_onlink ndpr_flags.onlink
286 #define ndpr_raf_auto ndpr_flags.autonomous
287 #define ndpr_raf_router ndpr_flags.router
290 * Message format for use in obtaining information about prefixes
291 * from inet6 sysctl function
293 struct inet6_ndpr_msghdr {
294 u_short inpm_msglen; /* to skip over non-understood messages */
295 u_char inpm_version; /* future binary compatibility */
296 u_char inpm_type; /* message type */
297 struct in6_addr inpm_prefix;
301 u_long prm_preferred;
302 struct in6_prflags prm_flags;
303 u_short prm_index; /* index for associated ifp */
304 u_char prm_plen; /* length of prefix in bits */
307 #define prm_raf_onlink prm_flags.prf_ra.onlink
308 #define prm_raf_auto prm_flags.prf_ra.autonomous
310 #define prm_statef_onlink prm_flags.prf_state.onlink
312 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid
313 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd
315 struct nd_pfxrouter {
316 LIST_ENTRY(nd_pfxrouter) pfr_entry;
317 struct nd_defrouter *router;
320 LIST_HEAD(nd_prhead, nd_prefix);
323 VNET_DECLARE(int, nd6_prune);
324 VNET_DECLARE(int, nd6_delay);
325 VNET_DECLARE(int, nd6_umaxtries);
326 VNET_DECLARE(int, nd6_mmaxtries);
327 VNET_DECLARE(int, nd6_useloopback);
328 VNET_DECLARE(int, nd6_maxnudhint);
329 VNET_DECLARE(int, nd6_gctimer);
330 VNET_DECLARE(struct nd_drhead, nd_defrouter);
331 VNET_DECLARE(struct nd_prhead, nd_prefix);
332 VNET_DECLARE(int, nd6_debug);
333 VNET_DECLARE(int, nd6_onlink_ns_rfc4861);
334 #define V_nd6_prune VNET(nd6_prune)
335 #define V_nd6_delay VNET(nd6_delay)
336 #define V_nd6_umaxtries VNET(nd6_umaxtries)
337 #define V_nd6_mmaxtries VNET(nd6_mmaxtries)
338 #define V_nd6_useloopback VNET(nd6_useloopback)
339 #define V_nd6_maxnudhint VNET(nd6_maxnudhint)
340 #define V_nd6_gctimer VNET(nd6_gctimer)
341 #define V_nd_defrouter VNET(nd_defrouter)
342 #define V_nd_prefix VNET(nd_prefix)
343 #define V_nd6_debug VNET(nd6_debug)
344 #define V_nd6_onlink_ns_rfc4861 VNET(nd6_onlink_ns_rfc4861)
346 #define nd6log(x) do { if (V_nd6_debug) log x; } while (/*CONSTCOND*/ 0)
348 VNET_DECLARE(struct callout, nd6_timer_ch);
349 #define V_nd6_timer_ch VNET(nd6_timer_ch)
352 VNET_DECLARE(int, nd6_defifindex);
353 VNET_DECLARE(int, ip6_desync_factor); /* seconds */
354 VNET_DECLARE(u_int32_t, ip6_temp_preferred_lifetime); /* seconds */
355 VNET_DECLARE(u_int32_t, ip6_temp_valid_lifetime); /* seconds */
356 VNET_DECLARE(int, ip6_temp_regen_advance); /* seconds */
357 #define V_nd6_defifindex VNET(nd6_defifindex)
358 #define V_ip6_desync_factor VNET(ip6_desync_factor)
359 #define V_ip6_temp_preferred_lifetime VNET(ip6_temp_preferred_lifetime)
360 #define V_ip6_temp_valid_lifetime VNET(ip6_temp_valid_lifetime)
361 #define V_ip6_temp_regen_advance VNET(ip6_temp_regen_advance)
364 struct nd_opt_hdr *nd_opt_array[16]; /* max = ND_OPT_NONCE */
366 struct nd_opt_hdr *zero;
367 struct nd_opt_hdr *src_lladdr;
368 struct nd_opt_hdr *tgt_lladdr;
369 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
370 struct nd_opt_rd_hdr *rh;
371 struct nd_opt_mtu *mtu;
372 struct nd_opt_hdr *__res6;
373 struct nd_opt_hdr *__res7;
374 struct nd_opt_hdr *__res8;
375 struct nd_opt_hdr *__res9;
376 struct nd_opt_hdr *__res10;
377 struct nd_opt_hdr *__res11;
378 struct nd_opt_hdr *__res12;
379 struct nd_opt_hdr *__res13;
380 struct nd_opt_nonce *nonce;
381 struct nd_opt_hdr *__res15;
382 struct nd_opt_hdr *search; /* multiple opts */
383 struct nd_opt_hdr *last; /* multiple opts */
385 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
388 #define nd_opts_src_lladdr nd_opt_each.src_lladdr
389 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr
390 #define nd_opts_pi nd_opt_each.pi_beg
391 #define nd_opts_pi_end nd_opt_each.pi_end
392 #define nd_opts_rh nd_opt_each.rh
393 #define nd_opts_mtu nd_opt_each.mtu
394 #define nd_opts_nonce nd_opt_each.nonce
395 #define nd_opts_search nd_opt_each.search
396 #define nd_opts_last nd_opt_each.last
397 #define nd_opts_done nd_opt_each.done
399 /* XXX: need nd6_var.h?? */
403 void nd6_destroy(void);
405 struct nd_ifinfo *nd6_ifattach(struct ifnet *);
406 void nd6_ifdetach(struct nd_ifinfo *);
407 int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *);
408 void nd6_option_init(void *, int, union nd_opts *);
409 struct nd_opt_hdr *nd6_option(union nd_opts *);
410 int nd6_options(union nd_opts *);
411 struct llentry *nd6_lookup(struct in6_addr *, int, struct ifnet *);
412 void nd6_setmtu(struct ifnet *);
413 void nd6_llinfo_settimer(struct llentry *, long);
414 void nd6_llinfo_settimer_locked(struct llentry *, long);
415 void nd6_timer(void *);
416 void nd6_purge(struct ifnet *);
417 void nd6_nud_hint(struct rtentry *, struct in6_addr *, int);
418 int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *,
419 struct sockaddr *, u_char *);
420 void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
421 int nd6_ioctl(u_long, caddr_t, struct ifnet *);
422 struct llentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
423 char *, int, int, int);
424 int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *,
425 struct sockaddr_in6 *, struct rtentry *);
426 void nd6_grab_holdchain(struct llentry *, struct mbuf **,
427 struct sockaddr_in6 *);
428 int nd6_flush_holdchain(struct ifnet *, struct ifnet *, struct mbuf *,
429 struct sockaddr_in6 *);
430 int nd6_need_cache(struct ifnet *);
431 int nd6_storelladdr(struct ifnet *, struct mbuf *,
432 const struct sockaddr *, u_char *, struct llentry **);
435 void nd6_na_input(struct mbuf *, int, int);
436 void nd6_na_output(struct ifnet *, const struct in6_addr *,
437 const struct in6_addr *, u_long, int, struct sockaddr *);
438 void nd6_ns_input(struct mbuf *, int, int);
439 void nd6_ns_output(struct ifnet *, const struct in6_addr *,
440 const struct in6_addr *, struct llentry *, uint8_t *);
441 caddr_t nd6_ifptomac(struct ifnet *);
442 void nd6_dad_init(void);
443 void nd6_dad_start(struct ifaddr *, int);
444 void nd6_dad_stop(struct ifaddr *);
447 void nd6_rs_input(struct mbuf *, int, int);
448 void nd6_ra_input(struct mbuf *, int, int);
449 void prelist_del(struct nd_prefix *);
450 void defrouter_reset(void);
451 void defrouter_select(void);
452 void defrtrlist_del(struct nd_defrouter *);
453 void prelist_remove(struct nd_prefix *);
454 int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *,
455 struct nd_prefix **);
456 void pfxlist_onlink_check(void);
457 struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *);
458 struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *);
459 void rt6_flush(struct in6_addr *, struct ifnet *);
460 int nd6_setdefaultiface(int);
461 int in6_tmpifadd(const struct in6_ifaddr *, int, int);
465 #endif /* _NETINET6_ND6_H_ */