FreeBSD/Linux Kernel Cross Reference
sys/netinet6/nd6.h
1 /* $FreeBSD$ */
2 /* $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 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@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 struct nd_ifinfo {
74 u_int32_t linkmtu; /* LinkMTU */
75 u_int32_t maxmtu; /* Upper bound of LinkMTU */
76 u_int32_t basereachable; /* BaseReachableTime */
77 u_int32_t reachable; /* Reachable Time */
78 u_int32_t retrans; /* Retrans Timer */
79 u_int32_t flags; /* Flags */
80 int recalctm; /* BaseReacable re-calculation timer */
81 u_int8_t chlim; /* CurHopLimit */
82 u_int8_t receivedra;
83 /* the following 3 members are for privacy extension for addrconf */
84 u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */
85 u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */
86 u_int8_t randomid[8]; /* current random ID */
87 };
88
89 #define ND6_IFF_PERFORMNUD 0x1
90 #define ND6_IFF_ACCEPT_RTADV 0x2
91
92 struct in6_nbrinfo {
93 char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */
94 struct in6_addr addr; /* IPv6 address of the neighbor */
95 long asked; /* number of queries already sent for this addr */
96 int isrouter; /* if it acts as a router */
97 int state; /* reachability state */
98 int expire; /* lifetime for NDP state transition */
99 };
100
101 #define DRLSTSIZ 10
102 #define PRLSTSIZ 10
103 struct in6_drlist {
104 char ifname[IFNAMSIZ];
105 struct {
106 struct in6_addr rtaddr;
107 u_char flags;
108 u_short rtlifetime;
109 u_long expire;
110 u_short if_index;
111 } defrouter[DRLSTSIZ];
112 };
113
114 struct in6_defrouter {
115 struct sockaddr_in6 rtaddr;
116 u_char flags;
117 u_short rtlifetime;
118 u_long expire;
119 u_short if_index;
120 };
121
122 struct in6_prlist {
123 char ifname[IFNAMSIZ];
124 struct {
125 struct in6_addr prefix;
126 struct prf_ra raflags;
127 u_char prefixlen;
128 u_char origin;
129 u_int32_t vltime;
130 u_int32_t pltime;
131 time_t expire;
132 u_short if_index;
133 u_short advrtrs; /* number of advertisement routers */
134 struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */
135 } prefix[PRLSTSIZ];
136 };
137
138 struct in6_prefix {
139 struct sockaddr_in6 prefix;
140 struct prf_ra raflags;
141 u_char prefixlen;
142 u_char origin;
143 u_long vltime;
144 u_long pltime;
145 u_long expire;
146 u_int32_t flags;
147 int refcnt;
148 u_short if_index;
149 u_short advrtrs; /* number of advertisement routers */
150 /* struct sockaddr_in6 advrtr[] */
151 };
152
153 #ifdef _KERNEL
154 struct in6_ondireq {
155 char ifname[IFNAMSIZ];
156 struct {
157 u_int32_t linkmtu; /* LinkMTU */
158 u_int32_t maxmtu; /* Upper bound of LinkMTU */
159 u_int32_t basereachable; /* BaseReachableTime */
160 u_int32_t reachable; /* Reachable Time */
161 u_int32_t retrans; /* Retrans Timer */
162 u_int32_t flags; /* Flags */
163 int recalctm; /* BaseReacable re-calculation timer */
164 u_int8_t chlim; /* CurHopLimit */
165 u_int8_t receivedra;
166 } ndi;
167 };
168 #endif
169
170 struct in6_ndireq {
171 char ifname[IFNAMSIZ];
172 struct nd_ifinfo ndi;
173 };
174
175 struct in6_ndifreq {
176 char ifname[IFNAMSIZ];
177 u_long ifindex;
178 };
179
180 /* Prefix status */
181 #define NDPRF_ONLINK 0x1
182 #define NDPRF_DETACHED 0x2
183
184 /* protocol constants */
185 #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */
186 #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */
187 #define MAX_RTR_SOLICITATIONS 3
188
189 #define ND6_INFINITE_LIFETIME 0xffffffff
190
191 #ifdef _KERNEL
192 /* node constants */
193 #define MAX_REACHABLE_TIME 3600000 /* msec */
194 #define REACHABLE_TIME 30000 /* msec */
195 #define RETRANS_TIMER 1000 /* msec */
196 #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */
197 #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */
198 #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */
199 #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */
200 #define TEMPADDR_REGEN_ADVANCE 5 /* sec */
201 #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */
202 #define ND_COMPUTE_RTIME(x) \
203 (((MIN_RANDOM_FACTOR * (x >> 10)) + (random() & \
204 ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000)
205
206 TAILQ_HEAD(nd_drhead, nd_defrouter);
207 struct nd_defrouter {
208 TAILQ_ENTRY(nd_defrouter) dr_entry;
209 struct in6_addr rtaddr;
210 u_char flags; /* flags on RA message */
211 u_short rtlifetime;
212 u_long expire;
213 u_long advint; /* Mobile IPv6 addition (milliseconds) */
214 u_long advint_expire; /* Mobile IPv6 addition */
215 int advints_lost; /* Mobile IPv6 addition */
216 struct ifnet *ifp;
217 };
218
219 struct nd_prefix {
220 struct ifnet *ndpr_ifp;
221 LIST_ENTRY(nd_prefix) ndpr_entry;
222 struct sockaddr_in6 ndpr_prefix; /* prefix */
223 struct in6_addr ndpr_mask; /* netmask derived from the prefix */
224 struct in6_addr ndpr_addr; /* address that is derived from the prefix */
225 u_int32_t ndpr_vltime; /* advertised valid lifetime */
226 u_int32_t ndpr_pltime; /* advertised preferred lifetime */
227 time_t ndpr_expire; /* expiration time of the prefix */
228 time_t ndpr_preferred; /* preferred time of the prefix */
229 struct prf_ra ndpr_flags;
230 u_int32_t ndpr_stateflags; /* actual state flags */
231 /* list of routers that advertise the prefix: */
232 LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs;
233 u_char ndpr_plen;
234 int ndpr_refcnt; /* reference couter from addresses */
235 };
236
237 #define ndpr_next ndpr_entry.le_next
238
239 #define ndpr_raf ndpr_flags
240 #define ndpr_raf_onlink ndpr_flags.onlink
241 #define ndpr_raf_auto ndpr_flags.autonomous
242
243 /*
244 * We keep expired prefix for certain amount of time, for validation purposes.
245 * 1800s = MaxRtrAdvInterval
246 */
247 #define NDPR_KEEP_EXPIRED (1800 * 2)
248
249 /*
250 * Message format for use in obtaining information about prefixes
251 * from inet6 sysctl function
252 */
253 struct inet6_ndpr_msghdr {
254 u_short inpm_msglen; /* to skip over non-understood messages */
255 u_char inpm_version; /* future binary compatability */
256 u_char inpm_type; /* message type */
257 struct in6_addr inpm_prefix;
258 u_long prm_vltim;
259 u_long prm_pltime;
260 u_long prm_expire;
261 u_long prm_preferred;
262 struct in6_prflags prm_flags;
263 u_short prm_index; /* index for associated ifp */
264 u_char prm_plen; /* length of prefix in bits */
265 };
266
267 #define prm_raf_onlink prm_flags.prf_ra.onlink
268 #define prm_raf_auto prm_flags.prf_ra.autonomous
269
270 #define prm_statef_onlink prm_flags.prf_state.onlink
271
272 #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid
273 #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd
274
275 #define ifpr2ndpr(ifpr) ((struct nd_prefix *)(ifpr))
276 #define ndpr2ifpr(ndpr) ((struct ifprefix *)(ndpr))
277
278 struct nd_pfxrouter {
279 LIST_ENTRY(nd_pfxrouter) pfr_entry;
280 #define pfr_next pfr_entry.le_next
281 struct nd_defrouter *router;
282 };
283
284 LIST_HEAD(nd_prhead, nd_prefix);
285
286 /* nd6.c */
287 extern int nd6_prune;
288 extern int nd6_delay;
289 extern int nd6_umaxtries;
290 extern int nd6_mmaxtries;
291 extern int nd6_useloopback;
292 extern int nd6_maxnudhint;
293 extern int nd6_gctimer;
294 extern struct llinfo_nd6 llinfo_nd6;
295 extern struct nd_ifinfo *nd_ifinfo;
296 extern struct nd_drhead nd_defrouter;
297 extern struct nd_prhead nd_prefix;
298 extern int nd6_debug;
299
300 #define nd6log(x) do { if (nd6_debug) log x; } while (0)
301
302 extern struct callout nd6_timer_ch;
303
304 /* nd6_rtr.c */
305 extern int nd6_defifindex;
306 extern int ip6_desync_factor; /* seconds */
307 extern u_int32_t ip6_temp_preferred_lifetime; /* seconds */
308 extern u_int32_t ip6_temp_valid_lifetime; /* seconds */
309 extern int ip6_temp_regen_advance; /* seconds */
310
311 union nd_opts {
312 struct nd_opt_hdr *nd_opt_array[9]; /* max = home agent info */
313 struct {
314 struct nd_opt_hdr *zero;
315 struct nd_opt_hdr *src_lladdr;
316 struct nd_opt_hdr *tgt_lladdr;
317 struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */
318 struct nd_opt_rd_hdr *rh;
319 struct nd_opt_mtu *mtu;
320 struct nd_opt_hdr *six;
321 struct nd_opt_advint *adv;
322 struct nd_opt_hai *hai;
323 struct nd_opt_hdr *search; /* multiple opts */
324 struct nd_opt_hdr *last; /* multiple opts */
325 int done;
326 struct nd_opt_prefix_info *pi_end;/* multiple opts, end */
327 } nd_opt_each;
328 };
329 #define nd_opts_src_lladdr nd_opt_each.src_lladdr
330 #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr
331 #define nd_opts_pi nd_opt_each.pi_beg
332 #define nd_opts_pi_end nd_opt_each.pi_end
333 #define nd_opts_rh nd_opt_each.rh
334 #define nd_opts_mtu nd_opt_each.mtu
335 #define nd_opts_adv nd_opt_each.adv
336 #define nd_opts_hai nd_opt_each.hai
337 #define nd_opts_search nd_opt_each.search
338 #define nd_opts_last nd_opt_each.last
339 #define nd_opts_done nd_opt_each.done
340
341 /* XXX: need nd6_var.h?? */
342 /* nd6.c */
343 void nd6_init __P((void));
344 void nd6_ifattach __P((struct ifnet *));
345 int nd6_is_addr_neighbor __P((struct sockaddr_in6 *, struct ifnet *));
346 void nd6_option_init __P((void *, int, union nd_opts *));
347 struct nd_opt_hdr *nd6_option __P((union nd_opts *));
348 int nd6_options __P((union nd_opts *));
349 struct rtentry *nd6_lookup __P((struct in6_addr *, int, struct ifnet *));
350 void nd6_setmtu __P((struct ifnet *));
351 void nd6_timer __P((void *));
352 void nd6_purge __P((struct ifnet *));
353 struct llinfo_nd6 *nd6_free __P((struct rtentry *));
354 void nd6_nud_hint __P((struct rtentry *, struct in6_addr *, int));
355 int nd6_resolve __P((struct ifnet *, struct rtentry *,
356 struct mbuf *, struct sockaddr *, u_char *));
357 void nd6_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *));
358 int nd6_ioctl __P((u_long, caddr_t, struct ifnet *));
359 struct rtentry *nd6_cache_lladdr __P((struct ifnet *, struct in6_addr *,
360 char *, int, int, int));
361 int nd6_output __P((struct ifnet *, struct ifnet *, struct mbuf *,
362 struct sockaddr_in6 *, struct rtentry *));
363 int nd6_storelladdr __P((struct ifnet *, struct rtentry *, struct mbuf *,
364 struct sockaddr *, u_char *));
365 int nd6_need_cache __P((struct ifnet *));
366
367 /* nd6_nbr.c */
368 void nd6_na_input __P((struct mbuf *, int, int));
369 void nd6_na_output __P((struct ifnet *, const struct in6_addr *,
370 const struct in6_addr *, u_long, int, struct sockaddr *));
371 void nd6_ns_input __P((struct mbuf *, int, int));
372 void nd6_ns_output __P((struct ifnet *, const struct in6_addr *,
373 const struct in6_addr *, struct llinfo_nd6 *, int));
374 caddr_t nd6_ifptomac __P((struct ifnet *));
375 void nd6_dad_start __P((struct ifaddr *, int *));
376 void nd6_dad_stop __P((struct ifaddr *));
377 void nd6_dad_duplicated __P((struct ifaddr *));
378
379 /* nd6_rtr.c */
380 void nd6_rs_input __P((struct mbuf *, int, int));
381 void nd6_ra_input __P((struct mbuf *, int, int));
382 void prelist_del __P((struct nd_prefix *));
383 void defrouter_addreq __P((struct nd_defrouter *));
384 void defrouter_delreq __P((struct nd_defrouter *, int));
385 void defrouter_select __P((void));
386 void defrtrlist_del __P((struct nd_defrouter *));
387 void prelist_remove __P((struct nd_prefix *));
388 int prelist_update __P((struct nd_prefix *, struct nd_defrouter *,
389 struct mbuf *));
390 int nd6_prelist_add __P((struct nd_prefix *, struct nd_defrouter *,
391 struct nd_prefix **));
392 int nd6_prefix_onlink __P((struct nd_prefix *));
393 int nd6_prefix_offlink __P((struct nd_prefix *));
394 void pfxlist_onlink_check __P((void));
395 struct nd_defrouter *defrouter_lookup __P((struct in6_addr *,
396 struct ifnet *));
397 struct nd_prefix *nd6_prefix_lookup __P((struct nd_prefix *));
398 int in6_init_prefix_ltimes __P((struct nd_prefix *ndpr));
399 void rt6_flush __P((struct in6_addr *, struct ifnet *));
400 int nd6_setdefaultiface __P((int));
401 int in6_tmpifadd __P((const struct in6_ifaddr *, int));
402
403 #endif /* _KERNEL */
404
405 #endif /* _NETINET6_ND6_H_ */
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