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1/*-
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
16 *
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)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $
30 * $FreeBSD: head/sys/netinet6/nd6.h 241916 2012-10-22 21:49:56Z delphij $
30 * $FreeBSD: head/sys/netinet6/nd6.h 245230 2013-01-09 18:18:08Z ume $
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
44struct llentry;
45
46#define ND6_LLINFO_NOSTATE -2
47/*
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)
53 */
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
60
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))
63
64struct nd_ifinfo {
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 */
78};
79
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)
85 */
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
91#define ND6_CREATE LLE_CREATE
92#define ND6_EXCLUSIVE LLE_EXCLUSIVE
93
94#ifdef _KERNEL
95#define ND_IFINFO(ifp) \
96 (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo)
97#define IN6_LINKMTU(ifp) \
98 ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \
99 ? ND_IFINFO(ifp)->linkmtu \
100 : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \
101 ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu))
102#endif
103
104struct in6_nbrinfo {
105 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */
106 struct in6_addr addr; /* IPv6 address of the neighbor */
107 long asked; /* number of queries already sent for this addr */
108 int isrouter; /* if it acts as a router */
109 int state; /* reachability state */
110 int expire; /* lifetime for NDP state transition */
111};
112
113#define DRLSTSIZ 10
114#define PRLSTSIZ 10
115struct in6_drlist {
116 char ifname[IFNAMSIZ];
117 struct {
118 struct in6_addr rtaddr;
119 u_char flags;
120 u_short rtlifetime;
121 u_long expire;
122 u_short if_index;
123 } defrouter[DRLSTSIZ];
124};
125
126struct in6_defrouter {
127 struct sockaddr_in6 rtaddr;
128 u_char flags;
129 u_short rtlifetime;
130 u_long expire;
131 u_short if_index;
132};
133
134#ifdef _KERNEL
135struct in6_oprlist {
136 char ifname[IFNAMSIZ];
137 struct {
138 struct in6_addr prefix;
139 struct prf_ra raflags;
140 u_char prefixlen;
141 u_char origin;
142 u_long vltime;
143 u_long pltime;
144 u_long expire;
145 u_short if_index;
146 u_short advrtrs; /* number of advertisement routers */
147 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
148 } prefix[PRLSTSIZ];
149};
150#endif
151
152struct in6_prlist {
153 char ifname[IFNAMSIZ];
154 struct {
155 struct in6_addr prefix;
156 struct prf_ra raflags;
157 u_char prefixlen;
158 u_char origin;
159 u_int32_t vltime;
160 u_int32_t pltime;
161 time_t expire;
162 u_short if_index;
163 u_short advrtrs; /* number of advertisement routers */
164 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
165 } prefix[PRLSTSIZ];
166};
167
168struct in6_prefix {
169 struct sockaddr_in6 prefix;
170 struct prf_ra raflags;
171 u_char prefixlen;
172 u_char origin;
173 u_int32_t vltime;
174 u_int32_t pltime;
175 time_t expire;
176 u_int32_t flags;
177 int refcnt;
178 u_short if_index;
179 u_short advrtrs; /* number of advertisement routers */
180 /* struct sockaddr_in6 advrtr[] */
181};
182
183#ifdef _KERNEL
184struct in6_ondireq {
185 char ifname[IFNAMSIZ];
186 struct {
187 u_int32_t linkmtu; /* LinkMTU */
188 u_int32_t maxmtu; /* Upper bound of LinkMTU */
189 u_int32_t basereachable; /* BaseReachableTime */
190 u_int32_t reachable; /* Reachable Time */
191 u_int32_t retrans; /* Retrans Timer */
192 u_int32_t flags; /* Flags */
193 int recalctm; /* BaseReacable re-calculation timer */
194 u_int8_t chlim; /* CurHopLimit */
195 u_int8_t receivedra;
196 } ndi;
197};
198#endif
199
200struct in6_ndireq {
201 char ifname[IFNAMSIZ];
202 struct nd_ifinfo ndi;
203};
204
205struct in6_ndifreq {
206 char ifname[IFNAMSIZ];
207 u_long ifindex;
208};
209
210/* Prefix status */
211#define NDPRF_ONLINK 0x1
212#define NDPRF_DETACHED 0x2
213
214/* protocol constants */
215#define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */
216#define RTR_SOLICITATION_INTERVAL 4 /* 4sec */
217#define MAX_RTR_SOLICITATIONS 3
218
219#define ND6_INFINITE_LIFETIME 0xffffffff
220
221#ifdef _KERNEL
222/* node constants */
223#define MAX_REACHABLE_TIME 3600000 /* msec */
224#define REACHABLE_TIME 30000 /* msec */
225#define RETRANS_TIMER 1000 /* msec */
226#define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */
227#define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */
228#define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */
229#define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */
230#define TEMPADDR_REGEN_ADVANCE 5 /* sec */
231#define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */
232#define ND_COMPUTE_RTIME(x) \
233 (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \
234 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
235
236TAILQ_HEAD(nd_drhead, nd_defrouter);
237struct nd_defrouter {
238 TAILQ_ENTRY(nd_defrouter) dr_entry;
239 struct in6_addr rtaddr;
240 u_char flags; /* flags on RA message */
241 u_short rtlifetime;
242 u_long expire;
243 struct ifnet *ifp;
244 int installed; /* is installed into kernel routing table */
245};
246
247struct nd_prefixctl {
248 struct ifnet *ndpr_ifp;
249
250 /* prefix */
251 struct sockaddr_in6 ndpr_prefix;
252 u_char ndpr_plen;
253
254 u_int32_t ndpr_vltime; /* advertised valid lifetime */
255 u_int32_t ndpr_pltime; /* advertised preferred lifetime */
256
257 struct prf_ra ndpr_flags;
258};
259
260
261struct nd_prefix {
262 struct ifnet *ndpr_ifp;
263 LIST_ENTRY(nd_prefix) ndpr_entry;
264 struct sockaddr_in6 ndpr_prefix; /* prefix */
265 struct in6_addr ndpr_mask; /* netmask derived from the prefix */
266
267 u_int32_t ndpr_vltime; /* advertised valid lifetime */
268 u_int32_t ndpr_pltime; /* advertised preferred lifetime */
269
270 time_t ndpr_expire; /* expiration time of the prefix */
271 time_t ndpr_preferred; /* preferred time of the prefix */
272 time_t ndpr_lastupdate; /* reception time of last advertisement */
273
274 struct prf_ra ndpr_flags;
275 u_int32_t ndpr_stateflags; /* actual state flags */
276 /* list of routers that advertise the prefix: */
277 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
278 u_char ndpr_plen;
279 int ndpr_refcnt; /* reference couter from addresses */
280};
281
282#define ndpr_raf ndpr_flags
283#define ndpr_raf_onlink ndpr_flags.onlink
284#define ndpr_raf_auto ndpr_flags.autonomous
285#define ndpr_raf_router ndpr_flags.router
286
287/*
288 * Message format for use in obtaining information about prefixes
289 * from inet6 sysctl function
290 */
291struct inet6_ndpr_msghdr {
292 u_short inpm_msglen; /* to skip over non-understood messages */
293 u_char inpm_version; /* future binary compatibility */
294 u_char inpm_type; /* message type */
295 struct in6_addr inpm_prefix;
296 u_long prm_vltim;
297 u_long prm_pltime;
298 u_long prm_expire;
299 u_long prm_preferred;
300 struct in6_prflags prm_flags;
301 u_short prm_index; /* index for associated ifp */
302 u_char prm_plen; /* length of prefix in bits */
303};
304
305#define prm_raf_onlink prm_flags.prf_ra.onlink
306#define prm_raf_auto prm_flags.prf_ra.autonomous
307
308#define prm_statef_onlink prm_flags.prf_state.onlink
309
310#define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid
311#define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd
312
313struct nd_pfxrouter {
314 LIST_ENTRY(nd_pfxrouter) pfr_entry;
315 struct nd_defrouter *router;
316};
317
318LIST_HEAD(nd_prhead, nd_prefix);
319
320/* nd6.c */
321VNET_DECLARE(int, nd6_prune);
322VNET_DECLARE(int, nd6_delay);
323VNET_DECLARE(int, nd6_umaxtries);
324VNET_DECLARE(int, nd6_mmaxtries);
325VNET_DECLARE(int, nd6_useloopback);
326VNET_DECLARE(int, nd6_maxnudhint);
327VNET_DECLARE(int, nd6_gctimer);
328VNET_DECLARE(struct nd_drhead, nd_defrouter);
329VNET_DECLARE(struct nd_prhead, nd_prefix);
330VNET_DECLARE(int, nd6_debug);
331VNET_DECLARE(int, nd6_onlink_ns_rfc4861);
332#define V_nd6_prune VNET(nd6_prune)
333#define V_nd6_delay VNET(nd6_delay)
334#define V_nd6_umaxtries VNET(nd6_umaxtries)
335#define V_nd6_mmaxtries VNET(nd6_mmaxtries)
336#define V_nd6_useloopback VNET(nd6_useloopback)
337#define V_nd6_maxnudhint VNET(nd6_maxnudhint)
338#define V_nd6_gctimer VNET(nd6_gctimer)
339#define V_nd_defrouter VNET(nd_defrouter)
340#define V_nd_prefix VNET(nd_prefix)
341#define V_nd6_debug VNET(nd6_debug)
342#define V_nd6_onlink_ns_rfc4861 VNET(nd6_onlink_ns_rfc4861)
343
344#define nd6log(x) do { if (V_nd6_debug) log x; } while (/*CONSTCOND*/ 0)
345
346VNET_DECLARE(struct callout, nd6_timer_ch);
347#define V_nd6_timer_ch VNET(nd6_timer_ch)
348
349/* nd6_rtr.c */
350VNET_DECLARE(int, nd6_defifindex);
351VNET_DECLARE(int, ip6_desync_factor); /* seconds */
352VNET_DECLARE(u_int32_t, ip6_temp_preferred_lifetime); /* seconds */
353VNET_DECLARE(u_int32_t, ip6_temp_valid_lifetime); /* seconds */
354VNET_DECLARE(int, ip6_temp_regen_advance); /* seconds */
355#define V_nd6_defifindex VNET(nd6_defifindex)
356#define V_ip6_desync_factor VNET(ip6_desync_factor)
357#define V_ip6_temp_preferred_lifetime VNET(ip6_temp_preferred_lifetime)
358#define V_ip6_temp_valid_lifetime VNET(ip6_temp_valid_lifetime)
359#define V_ip6_temp_regen_advance VNET(ip6_temp_regen_advance)
360
361union nd_opts {
362 struct nd_opt_hdr *nd_opt_array[8]; /* max = target address list */
363 struct {
364 struct nd_opt_hdr *zero;
365 struct nd_opt_hdr *src_lladdr;
366 struct nd_opt_hdr *tgt_lladdr;
367 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
368 struct nd_opt_rd_hdr *rh;
369 struct nd_opt_mtu *mtu;
370 struct nd_opt_hdr *search; /* multiple opts */
371 struct nd_opt_hdr *last; /* multiple opts */
372 int done;
373 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
374 } nd_opt_each;
375};
376#define nd_opts_src_lladdr nd_opt_each.src_lladdr
377#define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr
378#define nd_opts_pi nd_opt_each.pi_beg
379#define nd_opts_pi_end nd_opt_each.pi_end
380#define nd_opts_rh nd_opt_each.rh
381#define nd_opts_mtu nd_opt_each.mtu
382#define nd_opts_search nd_opt_each.search
383#define nd_opts_last nd_opt_each.last
384#define nd_opts_done nd_opt_each.done
385
386/* XXX: need nd6_var.h?? */
387/* nd6.c */
388void nd6_init(void);
389#ifdef VIMAGE
390void nd6_destroy(void);
391#endif
392struct nd_ifinfo *nd6_ifattach(struct ifnet *);
393void nd6_ifdetach(struct nd_ifinfo *);
394int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *);
395void nd6_option_init(void *, int, union nd_opts *);
396struct nd_opt_hdr *nd6_option(union nd_opts *);
397int nd6_options(union nd_opts *);
398struct llentry *nd6_lookup(struct in6_addr *, int, struct ifnet *);
399void nd6_setmtu(struct ifnet *);
400void nd6_llinfo_settimer(struct llentry *, long);
401void nd6_llinfo_settimer_locked(struct llentry *, long);
402void nd6_timer(void *);
403void nd6_purge(struct ifnet *);
404void nd6_nud_hint(struct rtentry *, struct in6_addr *, int);
405int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *,
406 struct sockaddr *, u_char *);
407void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
408int nd6_ioctl(u_long, caddr_t, struct ifnet *);
409struct llentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
410 char *, int, int, int);
411int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *,
412 struct sockaddr_in6 *, struct rtentry *);
413int nd6_output_lle(struct ifnet *, struct ifnet *, struct mbuf *,
414 struct sockaddr_in6 *, struct rtentry *, struct llentry *,
415 struct mbuf **);
416int nd6_output_flush(struct ifnet *, struct ifnet *, struct mbuf *,
417 struct sockaddr_in6 *, struct route *);
418int nd6_need_cache(struct ifnet *);
419int nd6_storelladdr(struct ifnet *, struct mbuf *,
420 struct sockaddr *, u_char *, struct llentry **);
421
422/* nd6_nbr.c */
423void nd6_na_input(struct mbuf *, int, int);
424void nd6_na_output(struct ifnet *, const struct in6_addr *,
425 const struct in6_addr *, u_long, int, struct sockaddr *);
426void nd6_ns_input(struct mbuf *, int, int);
427void nd6_ns_output(struct ifnet *, const struct in6_addr *,
428 const struct in6_addr *, struct llentry *, int);
429caddr_t nd6_ifptomac(struct ifnet *);
430void nd6_dad_start(struct ifaddr *, int);
431void nd6_dad_stop(struct ifaddr *);
432void nd6_dad_duplicated(struct ifaddr *);
433
434/* nd6_rtr.c */
435void nd6_rs_input(struct mbuf *, int, int);
436void nd6_ra_input(struct mbuf *, int, int);
437void prelist_del(struct nd_prefix *);
438void defrouter_reset(void);
439void defrouter_select(void);
440void defrtrlist_del(struct nd_defrouter *);
441void prelist_remove(struct nd_prefix *);
442int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *,
443 struct nd_prefix **);
444void pfxlist_onlink_check(void);
445struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *);
446struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *);
447void rt6_flush(struct in6_addr *, struct ifnet *);
448int nd6_setdefaultiface(int);
449int in6_tmpifadd(const struct in6_ifaddr *, int, int);
450
451#endif /* _KERNEL */
452
453#endif /* _NETINET6_ND6_H_ */