nd6_rtr.c revision 1.9 1 1.9 thorpej /* $NetBSD: nd6_rtr.c,v 1.9 2000/02/01 22:52:12 thorpej Exp $ */
2 1.3 thorpej
3 1.2 itojun /*
4 1.2 itojun * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 1.2 itojun * All rights reserved.
6 1.2 itojun *
7 1.2 itojun * Redistribution and use in source and binary forms, with or without
8 1.2 itojun * modification, are permitted provided that the following conditions
9 1.2 itojun * are met:
10 1.2 itojun * 1. Redistributions of source code must retain the above copyright
11 1.2 itojun * notice, this list of conditions and the following disclaimer.
12 1.2 itojun * 2. Redistributions in binary form must reproduce the above copyright
13 1.2 itojun * notice, this list of conditions and the following disclaimer in the
14 1.2 itojun * documentation and/or other materials provided with the distribution.
15 1.2 itojun * 3. Neither the name of the project nor the names of its contributors
16 1.2 itojun * may be used to endorse or promote products derived from this software
17 1.2 itojun * without specific prior written permission.
18 1.2 itojun *
19 1.2 itojun * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 1.2 itojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 1.2 itojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 1.2 itojun * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 1.2 itojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 1.2 itojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 1.2 itojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 1.2 itojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 1.2 itojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 1.2 itojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 1.2 itojun * SUCH DAMAGE.
30 1.2 itojun */
31 1.2 itojun
32 1.2 itojun #include <sys/param.h>
33 1.2 itojun #include <sys/systm.h>
34 1.2 itojun #include <sys/malloc.h>
35 1.2 itojun #include <sys/mbuf.h>
36 1.2 itojun #include <sys/socket.h>
37 1.2 itojun #include <sys/sockio.h>
38 1.2 itojun #include <sys/time.h>
39 1.2 itojun #include <sys/kernel.h>
40 1.2 itojun #include <sys/errno.h>
41 1.2 itojun #include <sys/ioctl.h>
42 1.2 itojun #include <sys/syslog.h>
43 1.2 itojun
44 1.2 itojun #include <net/if.h>
45 1.2 itojun #include <net/if_types.h>
46 1.2 itojun #include <net/if_dl.h>
47 1.2 itojun #include <net/route.h>
48 1.2 itojun #include <net/radix.h>
49 1.2 itojun
50 1.2 itojun #include <netinet/in.h>
51 1.2 itojun #include <netinet6/in6_var.h>
52 1.2 itojun #include <netinet6/ip6.h>
53 1.2 itojun #include <netinet6/ip6_var.h>
54 1.2 itojun #include <netinet6/nd6.h>
55 1.2 itojun #include <netinet6/icmp6.h>
56 1.2 itojun
57 1.7 itojun #include <net/net_osdep.h>
58 1.2 itojun
59 1.2 itojun #define SDL(s) ((struct sockaddr_dl *)s)
60 1.2 itojun
61 1.2 itojun static struct nd_defrouter *defrtrlist_update __P((struct nd_defrouter *));
62 1.2 itojun static int prelist_add __P((struct nd_prefix *, struct nd_defrouter *));
63 1.2 itojun static struct nd_prefix *prefix_lookup __P((struct nd_prefix *));
64 1.2 itojun static struct in6_ifaddr *in6_ifadd __P((struct ifnet *, struct in6_addr *,
65 1.2 itojun struct in6_addr *, int));
66 1.2 itojun static struct nd_pfxrouter *pfxrtr_lookup __P((struct nd_prefix *,
67 1.2 itojun struct nd_defrouter *));
68 1.2 itojun static void pfxrtr_add __P((struct nd_prefix *, struct nd_defrouter *));
69 1.2 itojun static void pfxrtr_del __P((struct nd_pfxrouter *));
70 1.7 itojun static struct nd_pfxrouter *find_pfxlist_reachable_router __P((struct nd_prefix *));
71 1.2 itojun static void nd6_detach_prefix __P((struct nd_prefix *));
72 1.2 itojun static void nd6_attach_prefix __P((struct nd_prefix *));
73 1.7 itojun static void defrouter_addifreq __P((struct ifnet *));
74 1.2 itojun
75 1.2 itojun static void in6_init_address_ltimes __P((struct nd_prefix *ndpr,
76 1.7 itojun struct in6_addrlifetime *lt6,
77 1.7 itojun int update_vltime));
78 1.2 itojun
79 1.2 itojun static int rt6_deleteroute __P((struct radix_node *, void *));
80 1.2 itojun
81 1.2 itojun extern int nd6_recalc_reachtm_interval;
82 1.2 itojun
83 1.7 itojun struct ifnet *nd6_defifp;
84 1.7 itojun int nd6_defifindex;
85 1.7 itojun
86 1.2 itojun /*
87 1.2 itojun * Receive Router Solicitation Message - just for routers.
88 1.2 itojun * Router solicitation/advertisement is mostly managed by userland program
89 1.2 itojun * (rtadvd) so here we have no function like nd6_ra_output().
90 1.2 itojun *
91 1.2 itojun * Based on RFC 2461
92 1.2 itojun */
93 1.2 itojun void
94 1.2 itojun nd6_rs_input(m, off, icmp6len)
95 1.2 itojun struct mbuf *m;
96 1.2 itojun int off, icmp6len;
97 1.2 itojun {
98 1.2 itojun struct ifnet *ifp = m->m_pkthdr.rcvif;
99 1.2 itojun struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
100 1.2 itojun struct nd_router_solicit *nd_rs
101 1.2 itojun = (struct nd_router_solicit *)((caddr_t)ip6 + off);
102 1.2 itojun struct in6_addr saddr6 = ip6->ip6_src;
103 1.2 itojun #if 0
104 1.2 itojun struct in6_addr daddr6 = ip6->ip6_dst;
105 1.2 itojun #endif
106 1.2 itojun char *lladdr = NULL;
107 1.2 itojun int lladdrlen = 0;
108 1.2 itojun #if 0
109 1.2 itojun struct sockaddr_dl *sdl = (struct sockaddr_dl *)NULL;
110 1.2 itojun struct llinfo_nd6 *ln = (struct llinfo_nd6 *)NULL;
111 1.2 itojun struct rtentry *rt = NULL;
112 1.2 itojun int is_newentry;
113 1.2 itojun #endif
114 1.2 itojun union nd_opts ndopts;
115 1.2 itojun
116 1.2 itojun /* If I'm not a router, ignore it. */
117 1.2 itojun if (ip6_accept_rtadv != 0 || ip6_forwarding != 1)
118 1.2 itojun return;
119 1.2 itojun
120 1.2 itojun /* Sanity checks */
121 1.2 itojun if (ip6->ip6_hlim != 255) {
122 1.2 itojun log(LOG_ERR,
123 1.2 itojun "nd6_rs_input: invalid hlim %d\n", ip6->ip6_hlim);
124 1.2 itojun return;
125 1.2 itojun }
126 1.2 itojun
127 1.2 itojun /*
128 1.2 itojun * Don't update the neighbor cache, if src = ::.
129 1.2 itojun * This indicates that the src has no IP address assigned yet.
130 1.2 itojun */
131 1.2 itojun if (IN6_IS_ADDR_UNSPECIFIED(&saddr6))
132 1.2 itojun return;
133 1.2 itojun
134 1.2 itojun icmp6len -= sizeof(*nd_rs);
135 1.2 itojun nd6_option_init(nd_rs + 1, icmp6len, &ndopts);
136 1.2 itojun if (nd6_options(&ndopts) < 0) {
137 1.2 itojun log(LOG_INFO, "nd6_rs_input: invalid ND option, ignored\n");
138 1.2 itojun return;
139 1.2 itojun }
140 1.2 itojun
141 1.2 itojun if (ndopts.nd_opts_src_lladdr) {
142 1.2 itojun lladdr = (char *)(ndopts.nd_opts_src_lladdr + 1);
143 1.2 itojun lladdrlen = ndopts.nd_opts_src_lladdr->nd_opt_len << 3;
144 1.2 itojun }
145 1.2 itojun
146 1.2 itojun if (lladdr && ((ifp->if_addrlen + 2 + 7) & ~7) != lladdrlen) {
147 1.2 itojun log(LOG_INFO,
148 1.2 itojun "nd6_rs_input: lladdrlen mismatch for %s "
149 1.2 itojun "(if %d, RS packet %d)\n",
150 1.2 itojun ip6_sprintf(&saddr6), ifp->if_addrlen, lladdrlen - 2);
151 1.2 itojun }
152 1.2 itojun
153 1.6 itojun nd6_cache_lladdr(ifp, &saddr6, lladdr, lladdrlen, ND_ROUTER_SOLICIT, 0);
154 1.2 itojun }
155 1.2 itojun
156 1.2 itojun /*
157 1.2 itojun * Receive Router Advertisement Message.
158 1.2 itojun *
159 1.2 itojun * Based on RFC 2461
160 1.2 itojun * TODO: on-link bit on prefix information
161 1.2 itojun * TODO: ND_RA_FLAG_{OTHER,MANAGED} processing
162 1.2 itojun */
163 1.2 itojun void
164 1.2 itojun nd6_ra_input(m, off, icmp6len)
165 1.2 itojun struct mbuf *m;
166 1.2 itojun int off, icmp6len;
167 1.2 itojun {
168 1.2 itojun struct ifnet *ifp = m->m_pkthdr.rcvif;
169 1.2 itojun struct nd_ifinfo *ndi = &nd_ifinfo[ifp->if_index];
170 1.2 itojun struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
171 1.2 itojun struct nd_router_advert *nd_ra =
172 1.2 itojun (struct nd_router_advert *)((caddr_t)ip6 + off);
173 1.2 itojun struct in6_addr saddr6 = ip6->ip6_src;
174 1.2 itojun #if 0
175 1.2 itojun struct in6_addr daddr6 = ip6->ip6_dst;
176 1.2 itojun int flags = nd_ra->nd_ra_flags_reserved;
177 1.2 itojun int is_managed = ((flags & ND_RA_FLAG_MANAGED) != 0);
178 1.2 itojun int is_other = ((flags & ND_RA_FLAG_OTHER) != 0);
179 1.2 itojun #endif
180 1.2 itojun union nd_opts ndopts;
181 1.2 itojun struct nd_defrouter *dr;
182 1.2 itojun
183 1.2 itojun if (ip6_accept_rtadv == 0)
184 1.2 itojun return;
185 1.2 itojun
186 1.2 itojun if (ip6->ip6_hlim != 255) {
187 1.2 itojun log(LOG_ERR,
188 1.2 itojun "nd6_ra_input: invalid hlim %d\n", ip6->ip6_hlim);
189 1.2 itojun return;
190 1.2 itojun }
191 1.2 itojun
192 1.2 itojun if (!IN6_IS_ADDR_LINKLOCAL(&saddr6)) {
193 1.2 itojun log(LOG_ERR,
194 1.2 itojun "nd6_ra_input: src %s is not link-local\n",
195 1.2 itojun ip6_sprintf(&saddr6));
196 1.2 itojun return;
197 1.2 itojun }
198 1.2 itojun
199 1.2 itojun icmp6len -= sizeof(*nd_ra);
200 1.2 itojun nd6_option_init(nd_ra + 1, icmp6len, &ndopts);
201 1.2 itojun if (nd6_options(&ndopts) < 0) {
202 1.2 itojun log(LOG_INFO, "nd6_ra_input: invalid ND option, ignored\n");
203 1.2 itojun return;
204 1.2 itojun }
205 1.2 itojun
206 1.2 itojun {
207 1.2 itojun struct nd_defrouter dr0;
208 1.2 itojun u_int32_t advreachable = nd_ra->nd_ra_reachable;
209 1.7 itojun long time_second = time.tv_sec;
210 1.2 itojun
211 1.2 itojun dr0.rtaddr = saddr6;
212 1.2 itojun dr0.flags = nd_ra->nd_ra_flags_reserved;
213 1.2 itojun dr0.rtlifetime = ntohs(nd_ra->nd_ra_router_lifetime);
214 1.2 itojun dr0.expire = time_second + dr0.rtlifetime;
215 1.2 itojun dr0.ifp = ifp;
216 1.2 itojun /* unspecified or not? (RFC 2461 6.3.4) */
217 1.2 itojun if (advreachable) {
218 1.2 itojun NTOHL(advreachable);
219 1.2 itojun if (advreachable <= MAX_REACHABLE_TIME &&
220 1.2 itojun ndi->basereachable != advreachable) {
221 1.2 itojun ndi->basereachable = advreachable;
222 1.2 itojun ndi->reachable = ND_COMPUTE_RTIME(ndi->basereachable);
223 1.2 itojun ndi->recalctm = nd6_recalc_reachtm_interval; /* reset */
224 1.2 itojun }
225 1.2 itojun }
226 1.2 itojun if (nd_ra->nd_ra_retransmit)
227 1.2 itojun ndi->retrans = ntohl(nd_ra->nd_ra_retransmit);
228 1.2 itojun if (nd_ra->nd_ra_curhoplimit)
229 1.2 itojun ndi->chlim = nd_ra->nd_ra_curhoplimit;
230 1.2 itojun dr = defrtrlist_update(&dr0);
231 1.2 itojun }
232 1.2 itojun
233 1.2 itojun /*
234 1.2 itojun * prefix
235 1.2 itojun */
236 1.2 itojun if (ndopts.nd_opts_pi) {
237 1.2 itojun struct nd_opt_hdr *pt;
238 1.2 itojun struct nd_opt_prefix_info *pi;
239 1.2 itojun struct nd_prefix pr;
240 1.2 itojun
241 1.2 itojun for (pt = (struct nd_opt_hdr *)ndopts.nd_opts_pi;
242 1.2 itojun pt <= (struct nd_opt_hdr *)ndopts.nd_opts_pi_end;
243 1.2 itojun pt = (struct nd_opt_hdr *)((caddr_t)pt +
244 1.2 itojun (pt->nd_opt_len << 3))) {
245 1.2 itojun if (pt->nd_opt_type != ND_OPT_PREFIX_INFORMATION)
246 1.2 itojun continue;
247 1.2 itojun pi = (struct nd_opt_prefix_info *)pt;
248 1.2 itojun
249 1.2 itojun if (pi->nd_opt_pi_len != 4) {
250 1.2 itojun log(LOG_INFO, "nd6_ra_input: invalid option "
251 1.2 itojun "len %d for prefix information option, "
252 1.2 itojun "ignored\n", pi->nd_opt_pi_len);
253 1.2 itojun continue;
254 1.2 itojun }
255 1.2 itojun
256 1.2 itojun if (128 < pi->nd_opt_pi_prefix_len) {
257 1.2 itojun log(LOG_INFO, "nd6_ra_input: invalid prefix "
258 1.2 itojun "len %d for prefix information option, "
259 1.2 itojun "ignored\n", pi->nd_opt_pi_prefix_len);
260 1.2 itojun continue;
261 1.2 itojun }
262 1.2 itojun
263 1.2 itojun if (IN6_IS_ADDR_MULTICAST(&pi->nd_opt_pi_prefix)
264 1.2 itojun || IN6_IS_ADDR_LINKLOCAL(&pi->nd_opt_pi_prefix)) {
265 1.2 itojun log(LOG_INFO, "nd6_ra_input: invalid prefix "
266 1.2 itojun "%s, ignored\n",
267 1.2 itojun ip6_sprintf(&pi->nd_opt_pi_prefix));
268 1.2 itojun continue;
269 1.2 itojun }
270 1.2 itojun
271 1.2 itojun /* aggregatable unicast address, rfc2374 */
272 1.2 itojun if ((pi->nd_opt_pi_prefix.s6_addr8[0] & 0xe0) == 0x20
273 1.2 itojun && pi->nd_opt_pi_prefix_len != 64) {
274 1.2 itojun log(LOG_INFO, "nd6_ra_input: invalid prefixlen "
275 1.2 itojun "%d for rfc2374 prefix %s, ignored\n",
276 1.2 itojun pi->nd_opt_pi_prefix_len,
277 1.2 itojun ip6_sprintf(&pi->nd_opt_pi_prefix));
278 1.2 itojun continue;
279 1.2 itojun }
280 1.2 itojun
281 1.2 itojun bzero(&pr, sizeof(pr));
282 1.2 itojun pr.ndpr_prefix.sin6_family = AF_INET6;
283 1.2 itojun pr.ndpr_prefix.sin6_len = sizeof(pr.ndpr_prefix);
284 1.2 itojun pr.ndpr_prefix.sin6_addr = pi->nd_opt_pi_prefix;
285 1.2 itojun pr.ndpr_ifp = (struct ifnet *)m->m_pkthdr.rcvif;
286 1.2 itojun
287 1.2 itojun pr.ndpr_raf_onlink = (pi->nd_opt_pi_flags_reserved &
288 1.2 itojun ND_OPT_PI_FLAG_ONLINK) ? 1 : 0;
289 1.2 itojun pr.ndpr_raf_auto = (pi->nd_opt_pi_flags_reserved &
290 1.2 itojun ND_OPT_PI_FLAG_AUTO) ? 1 : 0;
291 1.2 itojun pr.ndpr_plen = pi->nd_opt_pi_prefix_len;
292 1.2 itojun pr.ndpr_vltime = ntohl(pi->nd_opt_pi_valid_time);
293 1.2 itojun pr.ndpr_pltime =
294 1.2 itojun ntohl(pi->nd_opt_pi_preferred_time);
295 1.2 itojun
296 1.2 itojun if (in6_init_prefix_ltimes(&pr))
297 1.2 itojun continue; /* prefix lifetime init failed */
298 1.2 itojun
299 1.2 itojun (void)prelist_update(&pr, dr, m);
300 1.2 itojun }
301 1.2 itojun }
302 1.2 itojun
303 1.2 itojun /*
304 1.2 itojun * MTU
305 1.2 itojun */
306 1.2 itojun if (ndopts.nd_opts_mtu && ndopts.nd_opts_mtu->nd_opt_mtu_len == 1) {
307 1.2 itojun u_int32_t mtu = ntohl(ndopts.nd_opts_mtu->nd_opt_mtu_mtu);
308 1.2 itojun
309 1.2 itojun /* lower bound */
310 1.2 itojun if (mtu < IPV6_MMTU) {
311 1.2 itojun log(LOG_INFO, "nd6_ra_input: bogus mtu option "
312 1.2 itojun "mtu=%d sent from %s, ignoring\n",
313 1.2 itojun mtu, ip6_sprintf(&ip6->ip6_src));
314 1.2 itojun goto skip;
315 1.2 itojun }
316 1.2 itojun
317 1.2 itojun /* upper bound */
318 1.2 itojun if (ndi->maxmtu) {
319 1.2 itojun if (mtu <= ndi->maxmtu) {
320 1.2 itojun int change = (ndi->linkmtu != mtu);
321 1.2 itojun
322 1.2 itojun ndi->linkmtu = mtu;
323 1.2 itojun if (change) /* in6_maxmtu may change */
324 1.2 itojun in6_setmaxmtu();
325 1.2 itojun } else {
326 1.2 itojun log(LOG_INFO, "nd6_ra_input: bogus mtu "
327 1.2 itojun "mtu=%d sent from %s; "
328 1.2 itojun "exceeds maxmtu %d, ignoring\n",
329 1.2 itojun mtu, ip6_sprintf(&ip6->ip6_src),
330 1.2 itojun ndi->maxmtu);
331 1.2 itojun }
332 1.2 itojun } else {
333 1.2 itojun log(LOG_INFO, "nd6_ra_input: mtu option "
334 1.2 itojun "mtu=%d sent from %s; maxmtu unknown, "
335 1.2 itojun "ignoring\n",
336 1.2 itojun mtu, ip6_sprintf(&ip6->ip6_src));
337 1.2 itojun }
338 1.2 itojun }
339 1.2 itojun
340 1.2 itojun skip:
341 1.2 itojun
342 1.2 itojun /*
343 1.2 itojun * Src linkaddress
344 1.2 itojun */
345 1.2 itojun {
346 1.2 itojun char *lladdr = NULL;
347 1.2 itojun int lladdrlen = 0;
348 1.2 itojun
349 1.2 itojun if (ndopts.nd_opts_src_lladdr) {
350 1.2 itojun lladdr = (char *)(ndopts.nd_opts_src_lladdr + 1);
351 1.2 itojun lladdrlen = ndopts.nd_opts_src_lladdr->nd_opt_len << 3;
352 1.2 itojun }
353 1.2 itojun
354 1.2 itojun if (lladdr && ((ifp->if_addrlen + 2 + 7) & ~7) != lladdrlen) {
355 1.2 itojun log(LOG_INFO,
356 1.2 itojun "nd6_ra_input: lladdrlen mismatch for %s "
357 1.2 itojun "(if %d, RA packet %d)\n",
358 1.2 itojun ip6_sprintf(&saddr6), ifp->if_addrlen, lladdrlen - 2);
359 1.2 itojun }
360 1.2 itojun
361 1.6 itojun nd6_cache_lladdr(ifp, &saddr6, lladdr, lladdrlen, ND_ROUTER_ADVERT, 0);
362 1.7 itojun
363 1.7 itojun /*
364 1.7 itojun * Installing a link-layer address might change the state of the
365 1.7 itojun * router's neighbor cache, which might also affect our on-link
366 1.7 itojun * detection of adveritsed prefixes.
367 1.7 itojun */
368 1.7 itojun pfxlist_onlink_check();
369 1.2 itojun }
370 1.2 itojun }
371 1.2 itojun
372 1.2 itojun /*
373 1.2 itojun * default router list proccessing sub routines
374 1.2 itojun */
375 1.2 itojun void
376 1.2 itojun defrouter_addreq(new)
377 1.2 itojun struct nd_defrouter *new;
378 1.2 itojun {
379 1.2 itojun struct sockaddr_in6 def, mask, gate;
380 1.2 itojun int s;
381 1.2 itojun #if 0
382 1.2 itojun register struct radix_node *rn;
383 1.2 itojun register struct radix_node_head *rnh;
384 1.2 itojun struct sockaddr *ndst;
385 1.2 itojun struct ifnet *ifp = new->ifp;
386 1.2 itojun struct ifaddr *ifa;
387 1.2 itojun struct rtentry *rt;
388 1.2 itojun extern struct pool rtentry_pool;
389 1.2 itojun #endif
390 1.2 itojun
391 1.2 itojun Bzero(&def, sizeof(def));
392 1.2 itojun Bzero(&mask, sizeof(mask));
393 1.2 itojun Bzero(&gate, sizeof(gate));
394 1.2 itojun
395 1.2 itojun def.sin6_len = mask.sin6_len = gate.sin6_len
396 1.2 itojun = sizeof(struct sockaddr_in6);
397 1.2 itojun def.sin6_family = mask.sin6_family = gate.sin6_family = AF_INET6;
398 1.2 itojun gate.sin6_addr = new->rtaddr;
399 1.2 itojun
400 1.2 itojun #if 1
401 1.4 itojun s = splsoftnet();
402 1.2 itojun (void)rtrequest(RTM_ADD, (struct sockaddr *)&def,
403 1.2 itojun (struct sockaddr *)&gate, (struct sockaddr *)&mask,
404 1.2 itojun RTF_GATEWAY, NULL);
405 1.2 itojun splx(s);
406 1.2 itojun return;
407 1.2 itojun #else
408 1.2 itojun ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp);
409 1.2 itojun if (!ifa)
410 1.2 itojun return;
411 1.2 itojun if ((rnh = rt_tables[AF_INET6]) == 0)
412 1.2 itojun return;
413 1.2 itojun
414 1.4 itojun s = splsoftnet();
415 1.2 itojun rt = pool_get(&rtentry_pool, PR_NOWAIT);
416 1.2 itojun if (!rt)
417 1.2 itojun goto bad;
418 1.2 itojun Bzero(rt, sizeof(*rt));
419 1.2 itojun rt->rt_flags = RTF_UP | RTF_GATEWAY;
420 1.2 itojun if (rt_setgate(rt, (struct sockaddr *)&def, (struct sockaddr *)&gate)){
421 1.2 itojun Free(rt);
422 1.2 itojun goto bad;
423 1.2 itojun }
424 1.2 itojun ndst = rt_key(rt);
425 1.2 itojun Bcopy(&def, ndst, sizeof(def));
426 1.2 itojun rn = rnh->rnh_addaddr((caddr_t)ndst, (caddr_t)&mask,
427 1.2 itojun rnh, rt->rt_nodes);
428 1.2 itojun if (rn == 0) {
429 1.2 itojun Free(rt_key(rt));
430 1.2 itojun Free(rt);
431 1.2 itojun goto bad;
432 1.2 itojun }
433 1.9 thorpej IFAREF(ifa);
434 1.2 itojun rt->rt_ifa = ifa;
435 1.2 itojun rt->rt_ifp = ifp;
436 1.2 itojun rt->rt_rmx.rmx_mtu = ifa->ifa_ifp->if_mtu;
437 1.2 itojun /* xxx
438 1.2 itojun * many codes should be stolen from route.c
439 1.2 itojun */
440 1.2 itojun bad:
441 1.2 itojun splx(s);
442 1.2 itojun return;
443 1.2 itojun #endif
444 1.2 itojun }
445 1.2 itojun
446 1.7 itojun /* Add a route to a given interface as default */
447 1.7 itojun static void
448 1.7 itojun defrouter_addifreq(ifp)
449 1.7 itojun struct ifnet *ifp;
450 1.7 itojun {
451 1.7 itojun struct sockaddr_in6 def, mask;
452 1.7 itojun struct ifaddr *ifa;
453 1.7 itojun int error, flags;
454 1.7 itojun
455 1.7 itojun bzero(&def, sizeof(def));
456 1.7 itojun bzero(&mask, sizeof(mask));
457 1.7 itojun
458 1.7 itojun def.sin6_len = mask.sin6_len = sizeof(struct sockaddr_in6);
459 1.7 itojun def.sin6_family = mask.sin6_family = AF_INET6;
460 1.7 itojun
461 1.7 itojun /*
462 1.7 itojun * Search for an ifaddr beloging to the specified interface.
463 1.7 itojun * XXX: An IPv6 address are required to be assigned on the interface.
464 1.7 itojun */
465 1.7 itojun if ((ifa = ifaof_ifpforaddr((struct sockaddr *)&def, ifp)) == NULL) {
466 1.7 itojun log(LOG_ERR, /* better error? */
467 1.7 itojun "defrouter_addifreq: failed to find an ifaddr "
468 1.7 itojun "to install a route to interface %s\n",
469 1.7 itojun if_name(ifp));
470 1.7 itojun return;
471 1.7 itojun }
472 1.7 itojun
473 1.7 itojun flags = ifa->ifa_flags;
474 1.7 itojun if ((ifp->if_flags & IFF_POINTOPOINT) != 0)
475 1.7 itojun flags &= ~RTF_CLONING;
476 1.7 itojun if ((error = rtrequest(RTM_ADD, (struct sockaddr *)&def,
477 1.7 itojun ifa->ifa_addr, (struct sockaddr *)&mask,
478 1.7 itojun flags, NULL)) != 0) {
479 1.7 itojun log(LOG_ERR,
480 1.7 itojun "defrouter_addifreq: failed to install a route to "
481 1.7 itojun "interface %s (errno = %d)\n",
482 1.7 itojun if_name(ifp), error);
483 1.7 itojun }
484 1.7 itojun }
485 1.7 itojun
486 1.2 itojun struct nd_defrouter *
487 1.2 itojun defrouter_lookup(addr, ifp)
488 1.2 itojun struct in6_addr *addr;
489 1.2 itojun struct ifnet *ifp;
490 1.2 itojun {
491 1.2 itojun struct nd_defrouter *dr;
492 1.2 itojun
493 1.7 itojun for (dr = TAILQ_FIRST(&nd_defrouter); dr;
494 1.7 itojun dr = TAILQ_NEXT(dr, dr_entry)) {
495 1.2 itojun if (dr->ifp == ifp && IN6_ARE_ADDR_EQUAL(addr, &dr->rtaddr))
496 1.2 itojun return(dr);
497 1.7 itojun }
498 1.2 itojun
499 1.2 itojun return(NULL); /* search failed */
500 1.2 itojun }
501 1.2 itojun
502 1.2 itojun void
503 1.2 itojun defrouter_delreq(dr, dofree)
504 1.2 itojun struct nd_defrouter *dr;
505 1.2 itojun int dofree;
506 1.2 itojun {
507 1.2 itojun struct sockaddr_in6 def, mask, gate;
508 1.2 itojun
509 1.2 itojun Bzero(&def, sizeof(def));
510 1.2 itojun Bzero(&mask, sizeof(mask));
511 1.2 itojun Bzero(&gate, sizeof(gate));
512 1.2 itojun
513 1.2 itojun def.sin6_len = mask.sin6_len = gate.sin6_len
514 1.2 itojun = sizeof(struct sockaddr_in6);
515 1.2 itojun def.sin6_family = mask.sin6_family = gate.sin6_family = AF_INET6;
516 1.2 itojun gate.sin6_addr = dr->rtaddr;
517 1.2 itojun
518 1.2 itojun rtrequest(RTM_DELETE, (struct sockaddr *)&def,
519 1.2 itojun (struct sockaddr *)&gate,
520 1.2 itojun (struct sockaddr *)&mask,
521 1.2 itojun RTF_GATEWAY, (struct rtentry **)0);
522 1.2 itojun
523 1.7 itojun if (dofree) /* XXX: necessary? */
524 1.2 itojun free(dr, M_IP6NDP);
525 1.2 itojun }
526 1.2 itojun
527 1.2 itojun void
528 1.2 itojun defrtrlist_del(dr)
529 1.2 itojun struct nd_defrouter *dr;
530 1.2 itojun {
531 1.2 itojun struct nd_defrouter *deldr = NULL;
532 1.2 itojun struct nd_prefix *pr;
533 1.2 itojun
534 1.2 itojun /*
535 1.2 itojun * Flush all the routing table entries that use the router
536 1.2 itojun * as a next hop.
537 1.2 itojun */
538 1.2 itojun if (!ip6_forwarding && ip6_accept_rtadv) {
539 1.2 itojun /* above is a good condition? */
540 1.2 itojun rt6_flush(&dr->rtaddr, dr->ifp);
541 1.2 itojun }
542 1.2 itojun
543 1.7 itojun if (dr == TAILQ_FIRST(&nd_defrouter))
544 1.2 itojun deldr = dr; /* The router is primary. */
545 1.2 itojun
546 1.7 itojun TAILQ_REMOVE(&nd_defrouter, dr, dr_entry);
547 1.2 itojun
548 1.2 itojun /*
549 1.2 itojun * Also delete all the pointers to the router in each prefix lists.
550 1.2 itojun */
551 1.2 itojun for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next) {
552 1.2 itojun struct nd_pfxrouter *pfxrtr;
553 1.2 itojun if ((pfxrtr = pfxrtr_lookup(pr, dr)) != NULL)
554 1.2 itojun pfxrtr_del(pfxrtr);
555 1.2 itojun }
556 1.2 itojun pfxlist_onlink_check();
557 1.2 itojun
558 1.2 itojun /*
559 1.7 itojun * If the router is the primary one, choose a new one.
560 1.7 itojun * Note that defrouter_select() will remove the current gateway
561 1.7 itojun * from the routing table.
562 1.2 itojun */
563 1.2 itojun if (deldr)
564 1.7 itojun defrouter_select();
565 1.7 itojun
566 1.2 itojun free(dr, M_IP6NDP);
567 1.2 itojun }
568 1.2 itojun
569 1.7 itojun /*
570 1.7 itojun * Default Router Selection according to Section 6.3.6 of RFC 2461:
571 1.7 itojun * 1) Routers that are reachable or probably reachable should be
572 1.7 itojun * preferred.
573 1.7 itojun * 2) When no routers on the list are known to be reachable or
574 1.7 itojun * probably reachable, routers SHOULD be selected in a round-robin
575 1.7 itojun * fashion.
576 1.7 itojun * 3) If the Default Router List is empty, assume that all
577 1.7 itojun * destinations are on-link.
578 1.7 itojun */
579 1.7 itojun void
580 1.7 itojun defrouter_select()
581 1.7 itojun {
582 1.7 itojun int s = splsoftnet();
583 1.7 itojun struct nd_defrouter *dr, anydr;
584 1.7 itojun struct rtentry *rt = NULL;
585 1.7 itojun struct llinfo_nd6 *ln = NULL;
586 1.7 itojun
587 1.7 itojun /*
588 1.7 itojun * Search for a (probably) reachable router from the list.
589 1.7 itojun */
590 1.7 itojun for (dr = TAILQ_FIRST(&nd_defrouter); dr;
591 1.7 itojun dr = TAILQ_NEXT(dr, dr_entry)) {
592 1.7 itojun if ((rt = nd6_lookup(&dr->rtaddr, 0, dr->ifp)) &&
593 1.7 itojun (ln = (struct llinfo_nd6 *)rt->rt_llinfo) &&
594 1.7 itojun ND6_IS_LLINFO_PROBREACH(ln)) {
595 1.7 itojun /* Got it, and move it to the head */
596 1.7 itojun TAILQ_REMOVE(&nd_defrouter, dr, dr_entry);
597 1.7 itojun TAILQ_INSERT_HEAD(&nd_defrouter, dr, dr_entry);
598 1.7 itojun break;
599 1.7 itojun }
600 1.7 itojun }
601 1.7 itojun
602 1.7 itojun if ((dr = TAILQ_FIRST(&nd_defrouter))) {
603 1.7 itojun /*
604 1.7 itojun * De-install the previous default gateway and install
605 1.7 itojun * a new one.
606 1.7 itojun * Note that if there is no reachable router in the list,
607 1.7 itojun * the head entry will be used anyway.
608 1.7 itojun * XXX: do we have to check the current routing table entry?
609 1.7 itojun */
610 1.7 itojun bzero(&anydr, sizeof(anydr));
611 1.7 itojun defrouter_delreq(&anydr, 0);
612 1.7 itojun defrouter_addreq(dr);
613 1.7 itojun }
614 1.7 itojun else {
615 1.7 itojun /*
616 1.7 itojun * The Default Router List is empty, so install the default
617 1.7 itojun * route to an inteface.
618 1.7 itojun * XXX: The specification does not say this mechanism should
619 1.7 itojun * be restricted to hosts, but this would be not useful
620 1.7 itojun * (even harmful) for routers.
621 1.7 itojun */
622 1.7 itojun if (!ip6_forwarding) {
623 1.7 itojun /*
624 1.7 itojun * De-install the current default route
625 1.7 itojun * in advance.
626 1.7 itojun */
627 1.7 itojun bzero(&anydr, sizeof(anydr));
628 1.7 itojun defrouter_delreq(&anydr, 0);
629 1.7 itojun if (nd6_defifp) {
630 1.7 itojun /*
631 1.7 itojun * Install a route to the default interface
632 1.7 itojun * as default route.
633 1.7 itojun */
634 1.7 itojun defrouter_addifreq(nd6_defifp);
635 1.7 itojun }
636 1.7 itojun else /* noisy log? */
637 1.7 itojun log(LOG_INFO, "defrouter_select: "
638 1.7 itojun "there's no default router and no default"
639 1.7 itojun " interface\n");
640 1.7 itojun }
641 1.7 itojun }
642 1.7 itojun
643 1.7 itojun splx(s);
644 1.7 itojun return;
645 1.7 itojun }
646 1.7 itojun
647 1.2 itojun static struct nd_defrouter *
648 1.2 itojun defrtrlist_update(new)
649 1.2 itojun struct nd_defrouter *new;
650 1.2 itojun {
651 1.2 itojun struct nd_defrouter *dr, *n;
652 1.4 itojun int s = splsoftnet();
653 1.2 itojun
654 1.2 itojun if ((dr = defrouter_lookup(&new->rtaddr, new->ifp)) != NULL) {
655 1.2 itojun /* entry exists */
656 1.2 itojun if (new->rtlifetime == 0) {
657 1.2 itojun defrtrlist_del(dr);
658 1.2 itojun dr = NULL;
659 1.2 itojun } else {
660 1.2 itojun /* override */
661 1.2 itojun dr->flags = new->flags; /* xxx flag check */
662 1.2 itojun dr->rtlifetime = new->rtlifetime;
663 1.2 itojun dr->expire = new->expire;
664 1.2 itojun }
665 1.2 itojun splx(s);
666 1.2 itojun return(dr);
667 1.2 itojun }
668 1.2 itojun
669 1.2 itojun /* entry does not exist */
670 1.2 itojun if (new->rtlifetime == 0) {
671 1.2 itojun splx(s);
672 1.2 itojun return(NULL);
673 1.2 itojun }
674 1.2 itojun
675 1.2 itojun n = (struct nd_defrouter *)malloc(sizeof(*n), M_IP6NDP, M_NOWAIT);
676 1.2 itojun if (n == NULL) {
677 1.2 itojun splx(s);
678 1.2 itojun return(NULL);
679 1.2 itojun }
680 1.2 itojun bzero(n, sizeof(*n));
681 1.2 itojun *n = *new;
682 1.7 itojun
683 1.7 itojun /*
684 1.7 itojun * Insert the new router at the end of the Default Router List.
685 1.7 itojun * If there is no other router, install it anyway. Otherwise,
686 1.7 itojun * just continue to use the current default router.
687 1.7 itojun */
688 1.7 itojun TAILQ_INSERT_TAIL(&nd_defrouter, n, dr_entry);
689 1.7 itojun if (TAILQ_FIRST(&nd_defrouter) == n)
690 1.7 itojun defrouter_select();
691 1.2 itojun splx(s);
692 1.2 itojun
693 1.2 itojun return(n);
694 1.2 itojun }
695 1.2 itojun
696 1.2 itojun static struct nd_pfxrouter *
697 1.2 itojun pfxrtr_lookup(pr, dr)
698 1.2 itojun struct nd_prefix *pr;
699 1.2 itojun struct nd_defrouter *dr;
700 1.2 itojun {
701 1.2 itojun struct nd_pfxrouter *search;
702 1.2 itojun
703 1.2 itojun for (search = pr->ndpr_advrtrs.lh_first; search; search = search->pfr_next) {
704 1.2 itojun if (search->router == dr)
705 1.2 itojun break;
706 1.2 itojun }
707 1.2 itojun
708 1.2 itojun return(search);
709 1.2 itojun }
710 1.2 itojun
711 1.2 itojun static void
712 1.2 itojun pfxrtr_add(pr, dr)
713 1.2 itojun struct nd_prefix *pr;
714 1.2 itojun struct nd_defrouter *dr;
715 1.2 itojun {
716 1.2 itojun struct nd_pfxrouter *new;
717 1.2 itojun
718 1.2 itojun new = (struct nd_pfxrouter *)malloc(sizeof(*new), M_IP6NDP, M_NOWAIT);
719 1.2 itojun if (new == NULL)
720 1.2 itojun return;
721 1.2 itojun bzero(new, sizeof(*new));
722 1.2 itojun new->router = dr;
723 1.2 itojun
724 1.2 itojun LIST_INSERT_HEAD(&pr->ndpr_advrtrs, new, pfr_entry);
725 1.2 itojun
726 1.2 itojun pfxlist_onlink_check();
727 1.2 itojun }
728 1.2 itojun
729 1.2 itojun static void
730 1.2 itojun pfxrtr_del(pfr)
731 1.2 itojun struct nd_pfxrouter *pfr;
732 1.2 itojun {
733 1.2 itojun LIST_REMOVE(pfr, pfr_entry);
734 1.2 itojun free(pfr, M_IP6NDP);
735 1.2 itojun }
736 1.2 itojun
737 1.2 itojun static struct nd_prefix *
738 1.2 itojun prefix_lookup(pr)
739 1.2 itojun struct nd_prefix *pr;
740 1.2 itojun {
741 1.2 itojun struct nd_prefix *search;
742 1.2 itojun
743 1.2 itojun for (search = nd_prefix.lh_first; search; search = search->ndpr_next) {
744 1.2 itojun if (pr->ndpr_ifp == search->ndpr_ifp &&
745 1.2 itojun pr->ndpr_plen == search->ndpr_plen &&
746 1.2 itojun in6_are_prefix_equal(&pr->ndpr_prefix.sin6_addr,
747 1.2 itojun &search->ndpr_prefix.sin6_addr,
748 1.2 itojun pr->ndpr_plen)
749 1.2 itojun ) {
750 1.2 itojun break;
751 1.2 itojun }
752 1.2 itojun }
753 1.2 itojun
754 1.2 itojun return(search);
755 1.2 itojun }
756 1.2 itojun
757 1.2 itojun static int
758 1.2 itojun prelist_add(pr, dr)
759 1.2 itojun struct nd_prefix *pr;
760 1.2 itojun struct nd_defrouter *dr;
761 1.2 itojun {
762 1.2 itojun struct nd_prefix *new;
763 1.2 itojun int i, s;
764 1.2 itojun
765 1.2 itojun new = (struct nd_prefix *)malloc(sizeof(*new), M_IP6NDP, M_NOWAIT);
766 1.2 itojun if (new == NULL)
767 1.2 itojun return ENOMEM;
768 1.2 itojun bzero(new, sizeof(*new));
769 1.2 itojun *new = *pr;
770 1.2 itojun
771 1.2 itojun /* initilization */
772 1.2 itojun new->ndpr_statef_onlink = pr->ndpr_statef_onlink;
773 1.2 itojun LIST_INIT(&new->ndpr_advrtrs);
774 1.2 itojun in6_prefixlen2mask(&new->ndpr_mask, new->ndpr_plen);
775 1.2 itojun /* make prefix in the canonical form */
776 1.2 itojun for (i = 0; i < 4; i++)
777 1.2 itojun new->ndpr_prefix.sin6_addr.s6_addr32[i] &=
778 1.2 itojun new->ndpr_mask.s6_addr32[i];
779 1.2 itojun
780 1.2 itojun /* xxx ND_OPT_PI_FLAG_ONLINK processing */
781 1.2 itojun
782 1.4 itojun s = splsoftnet();
783 1.2 itojun /* link ndpr_entry to nd_prefix list */
784 1.2 itojun LIST_INSERT_HEAD(&nd_prefix, new, ndpr_entry);
785 1.2 itojun splx(s);
786 1.2 itojun
787 1.2 itojun if (dr)
788 1.2 itojun pfxrtr_add(new, dr);
789 1.2 itojun
790 1.2 itojun return 0;
791 1.2 itojun }
792 1.2 itojun
793 1.2 itojun void
794 1.2 itojun prelist_remove(pr)
795 1.2 itojun struct nd_prefix *pr;
796 1.2 itojun {
797 1.2 itojun struct nd_pfxrouter *pfr, *next;
798 1.2 itojun int s;
799 1.2 itojun
800 1.4 itojun s = splsoftnet();
801 1.2 itojun /* unlink ndpr_entry from nd_prefix list */
802 1.2 itojun LIST_REMOVE(pr, ndpr_entry);
803 1.2 itojun splx(s);
804 1.2 itojun
805 1.2 itojun /* free list of routers that adversed the prefix */
806 1.2 itojun for (pfr = pr->ndpr_advrtrs.lh_first; pfr; pfr = next) {
807 1.2 itojun next = pfr->pfr_next;
808 1.2 itojun
809 1.2 itojun free(pfr, M_IP6NDP);
810 1.2 itojun }
811 1.2 itojun free(pr, M_IP6NDP);
812 1.2 itojun
813 1.2 itojun pfxlist_onlink_check();
814 1.2 itojun }
815 1.2 itojun
816 1.2 itojun /*
817 1.2 itojun * NOTE: We set address lifetime to keep
818 1.2 itojun * address lifetime <= prefix lifetime
819 1.2 itojun * invariant. This is to simplify on-link determination code.
820 1.2 itojun * If onlink determination is udated, this routine may have to be updated too.
821 1.2 itojun */
822 1.2 itojun int
823 1.2 itojun prelist_update(new, dr, m)
824 1.2 itojun struct nd_prefix *new;
825 1.2 itojun struct nd_defrouter *dr; /* may be NULL */
826 1.2 itojun struct mbuf *m;
827 1.2 itojun {
828 1.2 itojun struct in6_ifaddr *ia6 = NULL;
829 1.2 itojun struct nd_prefix *pr;
830 1.4 itojun int s = splsoftnet();
831 1.2 itojun int error = 0;
832 1.2 itojun int auth;
833 1.2 itojun struct in6_addrlifetime *lt6;
834 1.2 itojun
835 1.7 itojun auth = 0;
836 1.2 itojun if (m) {
837 1.2 itojun /*
838 1.2 itojun * Authenticity for NA consists authentication for
839 1.2 itojun * both IP header and IP datagrams, doesn't it ?
840 1.2 itojun */
841 1.7 itojun #if defined(M_AUTHIPHDR) && defined(M_AUTHIPDGM)
842 1.2 itojun auth = (m->m_flags & M_AUTHIPHDR
843 1.2 itojun && m->m_flags & M_AUTHIPDGM) ? 1 : 0;
844 1.7 itojun #endif
845 1.7 itojun }
846 1.2 itojun
847 1.2 itojun if ((pr = prefix_lookup(new)) != NULL) {
848 1.2 itojun if (pr->ndpr_ifp != new->ndpr_ifp) {
849 1.2 itojun error = EADDRNOTAVAIL;
850 1.2 itojun goto end;
851 1.2 itojun }
852 1.2 itojun /* update prefix information */
853 1.7 itojun pr->ndpr_flags = new->ndpr_flags;
854 1.2 itojun pr->ndpr_vltime = new->ndpr_vltime;
855 1.2 itojun pr->ndpr_pltime = new->ndpr_pltime;
856 1.2 itojun pr->ndpr_preferred = new->ndpr_preferred;
857 1.2 itojun pr->ndpr_expire = new->ndpr_expire;
858 1.2 itojun
859 1.2 itojun /*
860 1.2 itojun * RFC 2462 5.5.3 (d) or (e)
861 1.2 itojun * We got a prefix which we have seen in the past.
862 1.2 itojun */
863 1.2 itojun if (!new->ndpr_raf_auto)
864 1.2 itojun goto noautoconf1;
865 1.2 itojun
866 1.2 itojun if (IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
867 1.2 itojun ia6 = NULL;
868 1.2 itojun else
869 1.2 itojun ia6 = in6ifa_ifpwithaddr(pr->ndpr_ifp, &pr->ndpr_addr);
870 1.2 itojun
871 1.2 itojun if (ia6 == NULL) {
872 1.2 itojun /*
873 1.2 itojun * Special case:
874 1.2 itojun * (1) We have seen the prefix advertised before, but
875 1.2 itojun * we have never performed autoconfig for this prefix.
876 1.2 itojun * This is because Autonomous bit was 0 previously, or
877 1.2 itojun * autoconfig failed due to some other reasons.
878 1.2 itojun * (2) We have seen the prefix advertised before and
879 1.2 itojun * we have performed autoconfig in the past, but
880 1.2 itojun * we seem to have no interface address right now.
881 1.2 itojun * This is because the interface address have expired.
882 1.2 itojun *
883 1.2 itojun * This prefix is fresh, with respect to autoconfig
884 1.2 itojun * process.
885 1.2 itojun *
886 1.2 itojun * Add an address based on RFC 2462 5.5.3 (d).
887 1.2 itojun */
888 1.2 itojun ia6 = in6_ifadd(pr->ndpr_ifp,
889 1.2 itojun &pr->ndpr_prefix.sin6_addr, &pr->ndpr_addr,
890 1.2 itojun new->ndpr_plen);
891 1.2 itojun if (!ia6) {
892 1.2 itojun error = EADDRNOTAVAIL;
893 1.2 itojun log(LOG_ERR, "prelist_update: failed to add a "
894 1.2 itojun "new address\n");
895 1.2 itojun goto noautoconf1;
896 1.2 itojun }
897 1.2 itojun
898 1.2 itojun lt6 = &ia6->ia6_lifetime;
899 1.2 itojun
900 1.2 itojun /* address lifetime <= prefix lifetime */
901 1.2 itojun lt6->ia6t_vltime = new->ndpr_vltime;
902 1.2 itojun lt6->ia6t_pltime = new->ndpr_pltime;
903 1.7 itojun in6_init_address_ltimes(new, lt6, 1);
904 1.2 itojun } else {
905 1.2 itojun #define TWOHOUR (120*60)
906 1.2 itojun /*
907 1.2 itojun * We have seen the prefix before, and we have added
908 1.2 itojun * interface address in the past. We still have
909 1.2 itojun * the interface address assigned.
910 1.2 itojun *
911 1.2 itojun * update address lifetime based on RFC 2462
912 1.2 itojun * 5.5.3 (e).
913 1.2 itojun */
914 1.2 itojun int update = 0;
915 1.2 itojun
916 1.2 itojun lt6 = &ia6->ia6_lifetime;
917 1.2 itojun
918 1.2 itojun #if 0 /* RFC 2462 5.5.3 (e) */
919 1.2 itojun lt6->ia6t_pltime = new->ndpr_pltime;
920 1.2 itojun if (TWOHOUR < new->ndpr_vltime
921 1.2 itojun || lt6pr->nd < new->ndpr_vltime) {
922 1.2 itojun lt6->ia6t_vltime = new->ndpr_vltime;
923 1.2 itojun update++;
924 1.2 itojun } else if (auth
925 1.2 itojun && lt6->ia6t_vltime <= TWOHOUR0
926 1.2 itojun && new->ndpr_vltime <= lt6->ia6t_vltime) {
927 1.2 itojun lt6->ia6t_vltime = new->ndpr_vltime;
928 1.2 itojun update++;
929 1.2 itojun } else {
930 1.2 itojun lt6->ia6t_vltime = TWOHOUR;
931 1.2 itojun update++;
932 1.2 itojun }
933 1.2 itojun
934 1.7 itojun /* 2 hour rule is not imposed for pref lifetime */
935 1.7 itojun new->ndpr_apltime = new->ndpr_pltime;
936 1.7 itojun lt6->ia6t_pltime = new->ndpr_pltime;
937 1.2 itojun #else /* update from Jim Bound, (ipng 6712) */
938 1.2 itojun if (TWOHOUR < new->ndpr_vltime
939 1.2 itojun || lt6->ia6t_vltime < new->ndpr_vltime) {
940 1.2 itojun lt6->ia6t_vltime = new->ndpr_vltime;
941 1.2 itojun update++;
942 1.2 itojun } else if (auth) {
943 1.7 itojun lt6->ia6t_vltime = new->ndpr_vltime;
944 1.2 itojun update++;
945 1.2 itojun }
946 1.7 itojun
947 1.7 itojun /* jim bound rule is not imposed for pref lifetime */
948 1.7 itojun lt6->ia6t_pltime = new->ndpr_pltime;
949 1.2 itojun #endif
950 1.7 itojun in6_init_address_ltimes(new, lt6, update);
951 1.2 itojun }
952 1.2 itojun
953 1.2 itojun noautoconf1:
954 1.2 itojun
955 1.2 itojun #if 0
956 1.2 itojun /* address lifetime expire processing, RFC 2462 5.5.4. */
957 1.2 itojun if (pr->ndpr_preferred && pr->ndpr_preferred < time_second) {
958 1.2 itojun struct in6_ifaddr *ia6;
959 1.2 itojun
960 1.2 itojun ia6 = in6ifa_ifpwithaddr(pr->ndpr_ifp, &pr->ndpr_addr);
961 1.2 itojun if (ia6)
962 1.2 itojun ia6->ia6_flags &= ~IN6_IFF_DEPRECATED;
963 1.2 itojun }
964 1.2 itojun #endif
965 1.2 itojun
966 1.2 itojun if (dr && pfxrtr_lookup(pr, dr) == NULL)
967 1.2 itojun pfxrtr_add(pr, dr);
968 1.2 itojun } else {
969 1.2 itojun int error_tmp;
970 1.2 itojun
971 1.2 itojun if (new->ndpr_vltime == 0) goto end;
972 1.2 itojun
973 1.2 itojun bzero(&new->ndpr_addr, sizeof(struct in6_addr));
974 1.2 itojun
975 1.2 itojun /*
976 1.2 itojun * RFC 2462 5.5.3 (d)
977 1.2 itojun * We got a fresh prefix. Perform some sanity checks
978 1.2 itojun * and add an interface address by appending interface ID
979 1.2 itojun * to the advertised prefix.
980 1.2 itojun */
981 1.2 itojun if (!new->ndpr_raf_auto)
982 1.2 itojun goto noautoconf2;
983 1.2 itojun
984 1.2 itojun ia6 = in6_ifadd(new->ndpr_ifp, &new->ndpr_prefix.sin6_addr,
985 1.2 itojun &new->ndpr_addr, new->ndpr_plen);
986 1.2 itojun if (!ia6) {
987 1.2 itojun error = EADDRNOTAVAIL;
988 1.2 itojun log(LOG_ERR, "prelist_update: "
989 1.2 itojun "failed to add a new address\n");
990 1.2 itojun goto noautoconf2;
991 1.2 itojun }
992 1.2 itojun /* set onlink bit if an interface route is configured */
993 1.2 itojun new->ndpr_statef_onlink = (ia6->ia_flags & IFA_ROUTE) ? 1 : 0;
994 1.2 itojun
995 1.2 itojun lt6 = &ia6->ia6_lifetime;
996 1.2 itojun
997 1.2 itojun /* address lifetime <= prefix lifetime */
998 1.2 itojun lt6->ia6t_vltime = new->ndpr_vltime;
999 1.2 itojun lt6->ia6t_pltime = new->ndpr_pltime;
1000 1.7 itojun in6_init_address_ltimes(new, lt6, 1);
1001 1.2 itojun
1002 1.2 itojun noautoconf2:
1003 1.2 itojun error_tmp = prelist_add(new, dr);
1004 1.2 itojun error = error_tmp ? error_tmp : error;
1005 1.2 itojun }
1006 1.2 itojun
1007 1.2 itojun end:
1008 1.2 itojun splx(s);
1009 1.2 itojun return error;
1010 1.2 itojun }
1011 1.2 itojun
1012 1.2 itojun /*
1013 1.7 itojun * A supplement function used in the on-link detection below;
1014 1.7 itojun * detect if a given prefix has a (probably) reachable advertising router.
1015 1.7 itojun * XXX: lengthy function name...
1016 1.7 itojun */
1017 1.7 itojun static struct nd_pfxrouter *
1018 1.7 itojun find_pfxlist_reachable_router(pr)
1019 1.7 itojun struct nd_prefix *pr;
1020 1.7 itojun {
1021 1.7 itojun struct nd_pfxrouter *pfxrtr;
1022 1.7 itojun struct rtentry *rt;
1023 1.7 itojun struct llinfo_nd6 *ln;
1024 1.7 itojun
1025 1.7 itojun for (pfxrtr = LIST_FIRST(&pr->ndpr_advrtrs); pfxrtr;
1026 1.7 itojun pfxrtr = LIST_NEXT(pfxrtr, pfr_entry)) {
1027 1.7 itojun if ((rt = nd6_lookup(&pfxrtr->router->rtaddr, 0,
1028 1.7 itojun pfxrtr->router->ifp)) &&
1029 1.7 itojun (ln = (struct llinfo_nd6 *)rt->rt_llinfo) &&
1030 1.7 itojun ND6_IS_LLINFO_PROBREACH(ln))
1031 1.7 itojun break; /* found */
1032 1.7 itojun }
1033 1.7 itojun
1034 1.7 itojun return(pfxrtr);
1035 1.7 itojun
1036 1.7 itojun }
1037 1.7 itojun
1038 1.7 itojun /*
1039 1.2 itojun * Check if each prefix in the prefix list has at least one available router
1040 1.7 itojun * that advertised the prefix (A router is "available" if its neighbor cache
1041 1.7 itojun * entry has reachable or probably reachable).
1042 1.7 itojun * If the check fails, the prefix may be off-link, because, for example,
1043 1.2 itojun * we have moved from the network but the lifetime of the prefix has not
1044 1.2 itojun * been expired yet. So we should not use the prefix if there is another
1045 1.2 itojun * prefix that has an available router.
1046 1.7 itojun * But if there is no prefix that has an available router, we still regards
1047 1.2 itojun * all the prefixes as on-link. This is because we can't tell if all the
1048 1.2 itojun * routers are simply dead or if we really moved from the network and there
1049 1.2 itojun * is no router around us.
1050 1.2 itojun */
1051 1.7 itojun void
1052 1.2 itojun pfxlist_onlink_check()
1053 1.2 itojun {
1054 1.2 itojun struct nd_prefix *pr;
1055 1.2 itojun
1056 1.7 itojun /*
1057 1.7 itojun * Check if there is a prefix that has a reachable advertising
1058 1.7 itojun * router.
1059 1.7 itojun */
1060 1.7 itojun for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next) {
1061 1.7 itojun if (find_pfxlist_reachable_router(pr))
1062 1.2 itojun break;
1063 1.7 itojun }
1064 1.2 itojun
1065 1.2 itojun if (pr) {
1066 1.2 itojun /*
1067 1.7 itojun * There is at least one prefix that has a reachable router.
1068 1.7 itojun * First, detach prefixes which has no reachable advertising
1069 1.7 itojun * router and then attach other prefixes.
1070 1.7 itojun * The order is important since an attached prefix and a
1071 1.7 itojun * detached prefix may have a same interface route.
1072 1.2 itojun */
1073 1.2 itojun for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next) {
1074 1.7 itojun if (find_pfxlist_reachable_router(pr) == NULL &&
1075 1.2 itojun pr->ndpr_statef_onlink) {
1076 1.2 itojun pr->ndpr_statef_onlink = 0;
1077 1.2 itojun nd6_detach_prefix(pr);
1078 1.2 itojun }
1079 1.2 itojun }
1080 1.2 itojun for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next) {
1081 1.7 itojun if (find_pfxlist_reachable_router(pr) &&
1082 1.7 itojun pr->ndpr_statef_onlink == 0)
1083 1.2 itojun nd6_attach_prefix(pr);
1084 1.2 itojun }
1085 1.2 itojun }
1086 1.2 itojun else {
1087 1.7 itojun /* there is no prefix that has a reachable router */
1088 1.2 itojun for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next)
1089 1.2 itojun if (pr->ndpr_statef_onlink == 0)
1090 1.2 itojun nd6_attach_prefix(pr);
1091 1.2 itojun }
1092 1.2 itojun }
1093 1.2 itojun
1094 1.2 itojun static void
1095 1.2 itojun nd6_detach_prefix(pr)
1096 1.2 itojun struct nd_prefix *pr;
1097 1.2 itojun {
1098 1.2 itojun struct in6_ifaddr *ia6;
1099 1.2 itojun struct sockaddr_in6 sa6, mask6;
1100 1.2 itojun
1101 1.2 itojun /*
1102 1.2 itojun * Delete the interface route associated with the prefix.
1103 1.2 itojun */
1104 1.2 itojun bzero(&sa6, sizeof(sa6));
1105 1.2 itojun sa6.sin6_family = AF_INET6;
1106 1.2 itojun sa6.sin6_len = sizeof(sa6);
1107 1.2 itojun bcopy(&pr->ndpr_prefix.sin6_addr, &sa6.sin6_addr,
1108 1.2 itojun sizeof(struct in6_addr));
1109 1.2 itojun bzero(&mask6, sizeof(mask6));
1110 1.2 itojun mask6.sin6_family = AF_INET6;
1111 1.2 itojun mask6.sin6_len = sizeof(sa6);
1112 1.2 itojun bcopy(&pr->ndpr_mask, &mask6.sin6_addr, sizeof(struct in6_addr));
1113 1.2 itojun {
1114 1.2 itojun int e;
1115 1.2 itojun
1116 1.2 itojun e = rtrequest(RTM_DELETE, (struct sockaddr *)&sa6, NULL,
1117 1.2 itojun (struct sockaddr *)&mask6, 0, NULL);
1118 1.2 itojun if (e) {
1119 1.2 itojun log(LOG_ERR,
1120 1.2 itojun "nd6_detach_prefix: failed to delete route: "
1121 1.2 itojun "%s/%d (errno = %d)\n",
1122 1.2 itojun ip6_sprintf(&sa6.sin6_addr),
1123 1.7 itojun pr->ndpr_plen,
1124 1.2 itojun e);
1125 1.2 itojun }
1126 1.2 itojun }
1127 1.2 itojun
1128 1.2 itojun /*
1129 1.2 itojun * Mark the address derived from the prefix detached so that
1130 1.2 itojun * it won't be used as a source address for a new connection.
1131 1.2 itojun */
1132 1.2 itojun if (IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
1133 1.2 itojun ia6 = NULL;
1134 1.2 itojun else
1135 1.2 itojun ia6 = in6ifa_ifpwithaddr(pr->ndpr_ifp, &pr->ndpr_addr);
1136 1.2 itojun if (ia6)
1137 1.2 itojun ia6->ia6_flags |= IN6_IFF_DETACHED;
1138 1.2 itojun }
1139 1.2 itojun
1140 1.2 itojun static void
1141 1.2 itojun nd6_attach_prefix(pr)
1142 1.2 itojun struct nd_prefix *pr;
1143 1.2 itojun {
1144 1.2 itojun struct ifaddr *ifa;
1145 1.2 itojun struct in6_ifaddr *ia6;
1146 1.2 itojun
1147 1.2 itojun /*
1148 1.2 itojun * Add the interface route associated with the prefix(if necessary)
1149 1.2 itojun * Should we consider if the L bit is set in pr->ndpr_flags?
1150 1.2 itojun */
1151 1.2 itojun ifa = ifaof_ifpforaddr((struct sockaddr *)&pr->ndpr_prefix,
1152 1.2 itojun pr->ndpr_ifp);
1153 1.2 itojun if (ifa == NULL) {
1154 1.2 itojun log(LOG_ERR,
1155 1.2 itojun "nd6_attach_prefix: failed to find any ifaddr"
1156 1.2 itojun " to add route for a prefix(%s/%d)\n",
1157 1.2 itojun ip6_sprintf(&pr->ndpr_addr), pr->ndpr_plen);
1158 1.2 itojun }
1159 1.2 itojun else {
1160 1.2 itojun int e;
1161 1.2 itojun struct sockaddr_in6 mask6;
1162 1.2 itojun
1163 1.2 itojun bzero(&mask6, sizeof(mask6));
1164 1.2 itojun mask6.sin6_family = AF_INET6;
1165 1.2 itojun mask6.sin6_len = sizeof(mask6);
1166 1.2 itojun mask6.sin6_addr = pr->ndpr_mask;
1167 1.2 itojun e = rtrequest(RTM_ADD, (struct sockaddr *)&pr->ndpr_prefix,
1168 1.2 itojun ifa->ifa_addr, (struct sockaddr *)&mask6,
1169 1.2 itojun ifa->ifa_flags, NULL);
1170 1.2 itojun if (e == 0)
1171 1.2 itojun pr->ndpr_statef_onlink = 1;
1172 1.2 itojun else {
1173 1.2 itojun log(LOG_ERR,
1174 1.2 itojun "nd6_attach_prefix: failed to add route for"
1175 1.2 itojun " a prefix(%s/%d), errno = %d\n",
1176 1.2 itojun ip6_sprintf(&pr->ndpr_addr), pr->ndpr_plen, e);
1177 1.2 itojun }
1178 1.2 itojun }
1179 1.2 itojun
1180 1.2 itojun /*
1181 1.2 itojun * Now the address derived from the prefix can be used as a source
1182 1.2 itojun * for a new connection, so clear the detached flag.
1183 1.2 itojun */
1184 1.2 itojun if (IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
1185 1.2 itojun ia6 = NULL;
1186 1.2 itojun else
1187 1.2 itojun ia6 = in6ifa_ifpwithaddr(pr->ndpr_ifp, &pr->ndpr_addr);
1188 1.2 itojun if (ia6) {
1189 1.2 itojun ia6->ia6_flags &= ~IN6_IFF_DETACHED;
1190 1.2 itojun if (pr->ndpr_statef_onlink)
1191 1.2 itojun ia6->ia_flags |= IFA_ROUTE;
1192 1.2 itojun }
1193 1.2 itojun }
1194 1.2 itojun
1195 1.2 itojun static struct in6_ifaddr *
1196 1.2 itojun in6_ifadd(ifp, in6, addr, prefixlen)
1197 1.2 itojun struct ifnet *ifp;
1198 1.2 itojun struct in6_addr *in6;
1199 1.2 itojun struct in6_addr *addr;
1200 1.2 itojun int prefixlen; /* prefix len of the new prefix in "in6" */
1201 1.2 itojun {
1202 1.2 itojun struct ifaddr *ifa;
1203 1.2 itojun struct in6_ifaddr *ia, *ib, *oia;
1204 1.2 itojun int s, error;
1205 1.2 itojun struct in6_addr mask;
1206 1.2 itojun
1207 1.2 itojun in6_len2mask(&mask, prefixlen);
1208 1.2 itojun
1209 1.2 itojun /* find link-local address (will be interface ID) */
1210 1.2 itojun ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp);
1211 1.2 itojun if (ifa)
1212 1.2 itojun ib = (struct in6_ifaddr *)ifa;
1213 1.2 itojun else
1214 1.2 itojun return NULL;
1215 1.2 itojun
1216 1.2 itojun #if 0 /* don't care link local addr state, and always do DAD */
1217 1.2 itojun /* if link-local address is not eligible, do not autoconfigure. */
1218 1.2 itojun if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) {
1219 1.2 itojun printf("in6_ifadd: link-local address not ready\n");
1220 1.2 itojun return NULL;
1221 1.2 itojun }
1222 1.2 itojun #endif
1223 1.2 itojun
1224 1.2 itojun /* prefixlen + ifidlen must be equal to 128 */
1225 1.2 itojun if (prefixlen != in6_mask2len(&ib->ia_prefixmask.sin6_addr)) {
1226 1.2 itojun log(LOG_ERR, "in6_ifadd: wrong prefixlen for %s"
1227 1.7 itojun "(prefix=%d ifid=%d)\n", if_name(ifp),
1228 1.2 itojun prefixlen,
1229 1.2 itojun 128 - in6_mask2len(&ib->ia_prefixmask.sin6_addr));
1230 1.2 itojun return NULL;
1231 1.2 itojun }
1232 1.2 itojun
1233 1.2 itojun /* make ifaddr */
1234 1.2 itojun ia = (struct in6_ifaddr *)malloc(sizeof(*ia), M_IFADDR, M_DONTWAIT);
1235 1.2 itojun if (ia == NULL) {
1236 1.2 itojun printf("ENOBUFS in in6_ifadd %d\n", __LINE__);
1237 1.2 itojun return NULL;
1238 1.2 itojun }
1239 1.2 itojun
1240 1.2 itojun bzero((caddr_t)ia, sizeof(*ia));
1241 1.2 itojun ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1242 1.2 itojun ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
1243 1.2 itojun ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1244 1.2 itojun ia->ia_ifp = ifp;
1245 1.2 itojun
1246 1.2 itojun /* link to in6_ifaddr */
1247 1.2 itojun if ((oia = in6_ifaddr) != NULL) {
1248 1.2 itojun for( ; oia->ia_next; oia = oia->ia_next)
1249 1.2 itojun continue;
1250 1.2 itojun oia->ia_next = ia;
1251 1.2 itojun } else
1252 1.2 itojun in6_ifaddr = ia;
1253 1.9 thorpej IFAREF((struct ifaddr *)ia);
1254 1.2 itojun
1255 1.2 itojun /* link to if_addrlist */
1256 1.2 itojun if (ifp->if_addrlist.tqh_first != NULL) {
1257 1.2 itojun TAILQ_INSERT_TAIL(&ifp->if_addrlist, (struct ifaddr *)ia,
1258 1.2 itojun ifa_list);
1259 1.9 thorpej IFAREF((struct ifaddr *)ia);
1260 1.2 itojun }
1261 1.2 itojun #if 0
1262 1.2 itojun else {
1263 1.2 itojun /*
1264 1.2 itojun * this should not be the case because there is at least one
1265 1.2 itojun * link-local address(see the beginning of the function).
1266 1.2 itojun */
1267 1.2 itojun TAILQ_INIT(&ifp->if_addrlist);
1268 1.2 itojun }
1269 1.2 itojun #endif
1270 1.2 itojun
1271 1.2 itojun /* new address */
1272 1.2 itojun ia->ia_addr.sin6_len = sizeof(struct sockaddr_in6);
1273 1.2 itojun ia->ia_addr.sin6_family = AF_INET6;
1274 1.2 itojun /* prefix */
1275 1.2 itojun bcopy(in6, &ia->ia_addr.sin6_addr, sizeof(ia->ia_addr.sin6_addr));
1276 1.2 itojun ia->ia_addr.sin6_addr.s6_addr32[0] &= mask.s6_addr32[0];
1277 1.2 itojun ia->ia_addr.sin6_addr.s6_addr32[1] &= mask.s6_addr32[1];
1278 1.2 itojun ia->ia_addr.sin6_addr.s6_addr32[2] &= mask.s6_addr32[2];
1279 1.2 itojun ia->ia_addr.sin6_addr.s6_addr32[3] &= mask.s6_addr32[3];
1280 1.2 itojun /* interface ID */
1281 1.2 itojun ia->ia_addr.sin6_addr.s6_addr32[0]
1282 1.2 itojun |= (ib->ia_addr.sin6_addr.s6_addr32[0] & ~mask.s6_addr32[0]);
1283 1.2 itojun ia->ia_addr.sin6_addr.s6_addr32[1]
1284 1.2 itojun |= (ib->ia_addr.sin6_addr.s6_addr32[1] & ~mask.s6_addr32[1]);
1285 1.2 itojun ia->ia_addr.sin6_addr.s6_addr32[2]
1286 1.2 itojun |= (ib->ia_addr.sin6_addr.s6_addr32[2] & ~mask.s6_addr32[2]);
1287 1.2 itojun ia->ia_addr.sin6_addr.s6_addr32[3]
1288 1.2 itojun |= (ib->ia_addr.sin6_addr.s6_addr32[3] & ~mask.s6_addr32[3]);
1289 1.2 itojun
1290 1.2 itojun /* new prefix */
1291 1.2 itojun ia->ia_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1292 1.2 itojun ia->ia_prefixmask.sin6_family = AF_INET6;
1293 1.2 itojun bcopy(&mask, &ia->ia_prefixmask.sin6_addr,
1294 1.2 itojun sizeof(ia->ia_prefixmask.sin6_addr));
1295 1.2 itojun
1296 1.2 itojun /* same routine */
1297 1.2 itojun ia->ia_ifa.ifa_rtrequest =
1298 1.2 itojun (ifp->if_type == IFT_PPP) ? nd6_p2p_rtrequest : nd6_rtrequest;
1299 1.2 itojun ia->ia_ifa.ifa_flags |= RTF_CLONING;
1300 1.2 itojun ia->ia_ifa.ifa_metric = ifp->if_metric;
1301 1.2 itojun
1302 1.2 itojun /* add interface route */
1303 1.2 itojun if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP|RTF_CLONING))) {
1304 1.2 itojun log(LOG_NOTICE, "in6_ifadd: failed to add an interface route "
1305 1.2 itojun "for %s/%d on %s, errno = %d\n",
1306 1.2 itojun ip6_sprintf(&ia->ia_addr.sin6_addr), prefixlen,
1307 1.7 itojun if_name(ifp), error);
1308 1.2 itojun }
1309 1.2 itojun else
1310 1.2 itojun ia->ia_flags |= IFA_ROUTE;
1311 1.2 itojun
1312 1.2 itojun *addr = ia->ia_addr.sin6_addr;
1313 1.2 itojun
1314 1.2 itojun if (ifp->if_flags & IFF_MULTICAST) {
1315 1.2 itojun int error; /* not used */
1316 1.2 itojun struct in6_addr sol6;
1317 1.2 itojun
1318 1.2 itojun /* Restore saved multicast addresses(if any). */
1319 1.2 itojun in6_restoremkludge(ia, ifp);
1320 1.2 itojun
1321 1.2 itojun /* join solicited node multicast address */
1322 1.2 itojun bzero(&sol6, sizeof(sol6));
1323 1.2 itojun sol6.s6_addr16[0] = htons(0xff02);
1324 1.2 itojun sol6.s6_addr16[1] = htons(ifp->if_index);
1325 1.2 itojun sol6.s6_addr32[1] = 0;
1326 1.2 itojun sol6.s6_addr32[2] = htonl(1);
1327 1.2 itojun sol6.s6_addr32[3] = ia->ia_addr.sin6_addr.s6_addr32[3];
1328 1.2 itojun sol6.s6_addr8[12] = 0xff;
1329 1.2 itojun (void)in6_addmulti(&sol6, ifp, &error);
1330 1.2 itojun }
1331 1.2 itojun
1332 1.2 itojun ia->ia6_flags |= IN6_IFF_TENTATIVE;
1333 1.2 itojun
1334 1.2 itojun /*
1335 1.2 itojun * To make the interface up. Only AF_INET6 in ia is used...
1336 1.2 itojun */
1337 1.2 itojun s = splimp();
1338 1.2 itojun if (ifp->if_ioctl && (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia)) {
1339 1.2 itojun splx(s);
1340 1.2 itojun return NULL;
1341 1.2 itojun }
1342 1.2 itojun splx(s);
1343 1.2 itojun
1344 1.2 itojun /* Perform DAD, if needed. */
1345 1.2 itojun nd6_dad_start((struct ifaddr *)ia, NULL);
1346 1.2 itojun
1347 1.2 itojun return ia;
1348 1.2 itojun }
1349 1.2 itojun
1350 1.2 itojun int
1351 1.2 itojun in6_ifdel(ifp, in6)
1352 1.2 itojun struct ifnet *ifp;
1353 1.2 itojun struct in6_addr *in6;
1354 1.2 itojun {
1355 1.2 itojun struct in6_ifaddr *ia = (struct in6_ifaddr *)NULL;
1356 1.2 itojun struct in6_ifaddr *oia = (struct in6_ifaddr *)NULL;
1357 1.2 itojun
1358 1.2 itojun if (!ifp)
1359 1.2 itojun return -1;
1360 1.2 itojun
1361 1.2 itojun ia = in6ifa_ifpwithaddr(ifp, in6);
1362 1.2 itojun if (!ia)
1363 1.2 itojun return -1;
1364 1.2 itojun
1365 1.2 itojun if (ifp->if_flags & IFF_MULTICAST) {
1366 1.2 itojun /*
1367 1.2 itojun * delete solicited multicast addr for deleting host id
1368 1.2 itojun */
1369 1.2 itojun struct in6_multi *in6m;
1370 1.2 itojun struct in6_addr llsol;
1371 1.2 itojun bzero(&llsol, sizeof(struct in6_addr));
1372 1.2 itojun llsol.s6_addr16[0] = htons(0xff02);
1373 1.2 itojun llsol.s6_addr16[1] = htons(ifp->if_index);
1374 1.2 itojun llsol.s6_addr32[1] = 0;
1375 1.2 itojun llsol.s6_addr32[2] = htonl(1);
1376 1.2 itojun llsol.s6_addr32[3] =
1377 1.2 itojun ia->ia_addr.sin6_addr.s6_addr32[3];
1378 1.2 itojun llsol.s6_addr8[12] = 0xff;
1379 1.2 itojun
1380 1.2 itojun IN6_LOOKUP_MULTI(llsol, ifp, in6m);
1381 1.2 itojun if (in6m)
1382 1.2 itojun in6_delmulti(in6m);
1383 1.2 itojun }
1384 1.2 itojun
1385 1.2 itojun if (ia->ia_flags & IFA_ROUTE) {
1386 1.2 itojun rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0);
1387 1.2 itojun ia->ia_flags &= ~IFA_ROUTE;
1388 1.2 itojun }
1389 1.2 itojun
1390 1.2 itojun TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list);
1391 1.9 thorpej IFAFREE((struct ifaddr *)ia);
1392 1.2 itojun
1393 1.2 itojun /* lladdr is never deleted */
1394 1.2 itojun oia = ia;
1395 1.2 itojun if (oia == (ia = in6_ifaddr))
1396 1.2 itojun in6_ifaddr = ia->ia_next;
1397 1.2 itojun else {
1398 1.2 itojun while (ia->ia_next && (ia->ia_next != oia))
1399 1.2 itojun ia = ia->ia_next;
1400 1.2 itojun if (ia->ia_next)
1401 1.2 itojun ia->ia_next = oia->ia_next;
1402 1.2 itojun else
1403 1.2 itojun return -1;
1404 1.2 itojun }
1405 1.2 itojun
1406 1.2 itojun in6_savemkludge(oia);
1407 1.2 itojun IFAFREE((&oia->ia_ifa));
1408 1.2 itojun /* xxx
1409 1.2 itojun rtrequest(RTM_DELETE,
1410 1.2 itojun (struct sockaddr *)&ia->ia_addr,
1411 1.2 itojun (struct sockaddr *)0
1412 1.2 itojun (struct sockaddr *)&ia->ia_prefixmask,
1413 1.2 itojun RTF_UP|RTF_CLONING,
1414 1.2 itojun (struct rtentry **)0);
1415 1.2 itojun */
1416 1.2 itojun return 0;
1417 1.2 itojun }
1418 1.2 itojun
1419 1.2 itojun int
1420 1.2 itojun in6_init_prefix_ltimes(struct nd_prefix *ndpr)
1421 1.2 itojun {
1422 1.7 itojun long time_second = time.tv_sec;
1423 1.7 itojun
1424 1.2 itojun /* check if preferred lifetime > valid lifetime */
1425 1.2 itojun if (ndpr->ndpr_pltime > ndpr->ndpr_vltime) {
1426 1.2 itojun log(LOG_INFO, "in6_init_prefix_ltimes: preferred lifetime"
1427 1.2 itojun "(%d) is greater than valid lifetime(%d)\n",
1428 1.2 itojun (u_int)ndpr->ndpr_pltime, (u_int)ndpr->ndpr_vltime);
1429 1.2 itojun return (EINVAL);
1430 1.2 itojun }
1431 1.7 itojun if (ndpr->ndpr_pltime == ND6_INFINITE_LIFETIME)
1432 1.2 itojun ndpr->ndpr_preferred = 0;
1433 1.2 itojun else
1434 1.2 itojun ndpr->ndpr_preferred = time_second + ndpr->ndpr_pltime;
1435 1.7 itojun if (ndpr->ndpr_vltime == ND6_INFINITE_LIFETIME)
1436 1.2 itojun ndpr->ndpr_expire = 0;
1437 1.2 itojun else
1438 1.2 itojun ndpr->ndpr_expire = time_second + ndpr->ndpr_vltime;
1439 1.2 itojun
1440 1.2 itojun return 0;
1441 1.2 itojun }
1442 1.2 itojun
1443 1.2 itojun static void
1444 1.7 itojun in6_init_address_ltimes(struct nd_prefix *new,
1445 1.7 itojun struct in6_addrlifetime *lt6,
1446 1.7 itojun int update_vltime)
1447 1.2 itojun {
1448 1.7 itojun long time_second = time.tv_sec;
1449 1.7 itojun
1450 1.7 itojun /* Valid lifetime must not be updated unless explicitly specified. */
1451 1.7 itojun if (update_vltime) {
1452 1.7 itojun /* init ia6t_expire */
1453 1.7 itojun if (lt6->ia6t_vltime == ND6_INFINITE_LIFETIME)
1454 1.7 itojun lt6->ia6t_expire = 0;
1455 1.7 itojun else {
1456 1.7 itojun lt6->ia6t_expire = time_second;
1457 1.7 itojun lt6->ia6t_expire += lt6->ia6t_vltime;
1458 1.7 itojun }
1459 1.7 itojun /* Ensure addr lifetime <= prefix lifetime. */
1460 1.7 itojun if (new->ndpr_expire && lt6->ia6t_expire &&
1461 1.7 itojun new->ndpr_expire < lt6->ia6t_expire)
1462 1.7 itojun lt6->ia6t_expire = new->ndpr_expire;
1463 1.2 itojun }
1464 1.7 itojun
1465 1.2 itojun /* init ia6t_preferred */
1466 1.7 itojun if (lt6->ia6t_pltime == ND6_INFINITE_LIFETIME)
1467 1.2 itojun lt6->ia6t_preferred = 0;
1468 1.2 itojun else {
1469 1.2 itojun lt6->ia6t_preferred = time_second;
1470 1.2 itojun lt6->ia6t_preferred += lt6->ia6t_pltime;
1471 1.2 itojun }
1472 1.7 itojun /* Ensure addr lifetime <= prefix lifetime. */
1473 1.2 itojun if (new->ndpr_preferred && lt6->ia6t_preferred
1474 1.2 itojun && new->ndpr_preferred < lt6->ia6t_preferred)
1475 1.2 itojun lt6->ia6t_preferred = new->ndpr_preferred;
1476 1.2 itojun }
1477 1.2 itojun
1478 1.2 itojun /*
1479 1.2 itojun * Delete all the routing table entries that use the specified gateway.
1480 1.2 itojun * XXX: this function causes search through all entries of routing table, so
1481 1.2 itojun * it shouldn't be called when acting as a router.
1482 1.2 itojun */
1483 1.2 itojun void
1484 1.2 itojun rt6_flush(gateway, ifp)
1485 1.2 itojun struct in6_addr *gateway;
1486 1.2 itojun struct ifnet *ifp;
1487 1.2 itojun {
1488 1.2 itojun struct radix_node_head *rnh = rt_tables[AF_INET6];
1489 1.4 itojun int s = splsoftnet();
1490 1.2 itojun
1491 1.2 itojun /* We'll care only link-local addresses */
1492 1.2 itojun if (!IN6_IS_ADDR_LINKLOCAL(gateway)) {
1493 1.2 itojun splx(s);
1494 1.2 itojun return;
1495 1.2 itojun }
1496 1.2 itojun /* XXX: hack for KAME's link-local address kludge */
1497 1.2 itojun gateway->s6_addr16[1] = htons(ifp->if_index);
1498 1.2 itojun
1499 1.2 itojun rnh->rnh_walktree(rnh, rt6_deleteroute, (void *)gateway);
1500 1.2 itojun splx(s);
1501 1.2 itojun }
1502 1.2 itojun
1503 1.2 itojun static int
1504 1.2 itojun rt6_deleteroute(rn, arg)
1505 1.2 itojun struct radix_node *rn;
1506 1.2 itojun void *arg;
1507 1.2 itojun {
1508 1.2 itojun #define SIN6(s) ((struct sockaddr_in6 *)s)
1509 1.2 itojun struct rtentry *rt = (struct rtentry *)rn;
1510 1.2 itojun struct in6_addr *gate = (struct in6_addr *)arg;
1511 1.2 itojun
1512 1.2 itojun if (rt->rt_gateway == NULL || rt->rt_gateway->sa_family != AF_INET6)
1513 1.2 itojun return(0);
1514 1.2 itojun
1515 1.2 itojun if (!IN6_ARE_ADDR_EQUAL(gate, &SIN6(rt->rt_gateway)->sin6_addr))
1516 1.2 itojun return(0);
1517 1.2 itojun
1518 1.2 itojun /*
1519 1.2 itojun * We delete only host route. This means, in particular, we don't
1520 1.2 itojun * delete default route.
1521 1.2 itojun */
1522 1.2 itojun if ((rt->rt_flags & RTF_HOST) == 0)
1523 1.2 itojun return(0);
1524 1.2 itojun
1525 1.2 itojun return(rtrequest(RTM_DELETE, rt_key(rt),
1526 1.2 itojun rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0));
1527 1.2 itojun #undef SIN6
1528 1.2 itojun }
1529 1.7 itojun
1530 1.7 itojun int
1531 1.7 itojun nd6_setdefaultiface(ifindex)
1532 1.7 itojun int ifindex;
1533 1.7 itojun {
1534 1.7 itojun int error = 0;
1535 1.7 itojun
1536 1.7 itojun if (ifindex < 0 || if_index < ifindex)
1537 1.7 itojun return(EINVAL);
1538 1.7 itojun
1539 1.7 itojun if (nd6_defifindex != ifindex) {
1540 1.7 itojun nd6_defifindex = ifindex;
1541 1.7 itojun if (nd6_defifindex > 0)
1542 1.7 itojun nd6_defifp = ifindex2ifnet[nd6_defifindex];
1543 1.7 itojun else
1544 1.7 itojun nd6_defifp = NULL;
1545 1.7 itojun
1546 1.7 itojun /*
1547 1.7 itojun * If the Default Router List is empty, install a route
1548 1.7 itojun * to the specified interface as default or remove the default
1549 1.7 itojun * route when the default interface becomes canceled.
1550 1.7 itojun * The check for the queue is actually redundant, but
1551 1.7 itojun * we do this here to avoid re-install the default route
1552 1.7 itojun * if the list is NOT empty.
1553 1.7 itojun */
1554 1.7 itojun if (TAILQ_FIRST(&nd_defrouter) == NULL)
1555 1.7 itojun defrouter_select();
1556 1.7 itojun }
1557 1.7 itojun
1558 1.7 itojun return(error);
1559 1.7 itojun }
1560