FreeBSD/Linux Kernel Cross Reference
sys/netinet6/in6.c
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $
32 */
33
34 /*-
35 * Copyright (c) 1982, 1986, 1991, 1993
36 * The Regents of the University of California. All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * SUCH DAMAGE.
61 *
62 * @(#)in.c 8.2 (Berkeley) 11/15/93
63 */
64
65 #include <sys/cdefs.h>
66 __FBSDID("$FreeBSD: releng/12.0/sys/netinet6/in6.c 343787 2019-02-05 17:59:50Z emaste $");
67
68 #include "opt_inet.h"
69 #include "opt_inet6.h"
70
71 #include <sys/param.h>
72 #include <sys/eventhandler.h>
73 #include <sys/errno.h>
74 #include <sys/jail.h>
75 #include <sys/malloc.h>
76 #include <sys/socket.h>
77 #include <sys/socketvar.h>
78 #include <sys/sockio.h>
79 #include <sys/systm.h>
80 #include <sys/priv.h>
81 #include <sys/proc.h>
82 #include <sys/protosw.h>
83 #include <sys/time.h>
84 #include <sys/kernel.h>
85 #include <sys/lock.h>
86 #include <sys/rmlock.h>
87 #include <sys/syslog.h>
88
89 #include <net/if.h>
90 #include <net/if_var.h>
91 #include <net/if_types.h>
92 #include <net/route.h>
93 #include <net/if_dl.h>
94 #include <net/vnet.h>
95
96 #include <netinet/in.h>
97 #include <netinet/in_var.h>
98 #include <net/if_llatbl.h>
99 #include <netinet/if_ether.h>
100 #include <netinet/in_systm.h>
101 #include <netinet/ip.h>
102 #include <netinet/in_pcb.h>
103 #include <netinet/ip_carp.h>
104
105 #include <netinet/ip6.h>
106 #include <netinet6/ip6_var.h>
107 #include <netinet6/nd6.h>
108 #include <netinet6/mld6_var.h>
109 #include <netinet6/ip6_mroute.h>
110 #include <netinet6/in6_ifattach.h>
111 #include <netinet6/scope6_var.h>
112 #include <netinet6/in6_fib.h>
113 #include <netinet6/in6_pcb.h>
114
115
116 /*
117 * struct in6_ifreq and struct ifreq must be type punnable for common members
118 * of ifr_ifru to allow accessors to be shared.
119 */
120 _Static_assert(offsetof(struct in6_ifreq, ifr_ifru) ==
121 offsetof(struct ifreq, ifr_ifru),
122 "struct in6_ifreq and struct ifreq are not type punnable");
123
124 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
125 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
126
127 /*
128 * Definitions of some costant IP6 addresses.
129 */
130 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
131 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
132 const struct in6_addr in6addr_nodelocal_allnodes =
133 IN6ADDR_NODELOCAL_ALLNODES_INIT;
134 const struct in6_addr in6addr_linklocal_allnodes =
135 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
136 const struct in6_addr in6addr_linklocal_allrouters =
137 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
138 const struct in6_addr in6addr_linklocal_allv2routers =
139 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
140
141 const struct in6_addr in6mask0 = IN6MASK0;
142 const struct in6_addr in6mask32 = IN6MASK32;
143 const struct in6_addr in6mask64 = IN6MASK64;
144 const struct in6_addr in6mask96 = IN6MASK96;
145 const struct in6_addr in6mask128 = IN6MASK128;
146
147 const struct sockaddr_in6 sa6_any =
148 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
149
150 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
151 struct in6_aliasreq *, int);
152 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
153
154 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *,
155 struct in6_ifaddr *, int);
156 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *,
157 struct in6_aliasreq *, int flags);
158 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *,
159 struct in6_ifaddr *, int, int);
160 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
161 struct in6_ifaddr *, int);
162
163 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
164 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
165
166
167 void
168 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd)
169 {
170 struct sockaddr_dl gateway;
171 struct sockaddr_in6 mask, addr;
172 struct rtentry rt;
173 int fibnum;
174
175 /*
176 * initialize for rtmsg generation
177 */
178 bzero(&gateway, sizeof(gateway));
179 gateway.sdl_len = sizeof(gateway);
180 gateway.sdl_family = AF_LINK;
181
182 bzero(&rt, sizeof(rt));
183 rt.rt_gateway = (struct sockaddr *)&gateway;
184 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
185 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
186 rt_mask(&rt) = (struct sockaddr *)&mask;
187 rt_key(&rt) = (struct sockaddr *)&addr;
188 rt.rt_flags = RTF_HOST | RTF_STATIC;
189 if (cmd == RTM_ADD)
190 rt.rt_flags |= RTF_UP;
191 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ia62ifa(ia)->ifa_ifp->if_fib;
192 /* Announce arrival of local address to this FIB. */
193 rt_newaddrmsg_fib(cmd, &ia->ia_ifa, 0, &rt, fibnum);
194 }
195
196 int
197 in6_mask2len(struct in6_addr *mask, u_char *lim0)
198 {
199 int x = 0, y;
200 u_char *lim = lim0, *p;
201
202 /* ignore the scope_id part */
203 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
204 lim = (u_char *)mask + sizeof(*mask);
205 for (p = (u_char *)mask; p < lim; x++, p++) {
206 if (*p != 0xff)
207 break;
208 }
209 y = 0;
210 if (p < lim) {
211 for (y = 0; y < 8; y++) {
212 if ((*p & (0x80 >> y)) == 0)
213 break;
214 }
215 }
216
217 /*
218 * when the limit pointer is given, do a stricter check on the
219 * remaining bits.
220 */
221 if (p < lim) {
222 if (y != 0 && (*p & (0x00ff >> y)) != 0)
223 return (-1);
224 for (p = p + 1; p < lim; p++)
225 if (*p != 0)
226 return (-1);
227 }
228
229 return x * 8 + y;
230 }
231
232 #ifdef COMPAT_FREEBSD32
233 struct in6_ndifreq32 {
234 char ifname[IFNAMSIZ];
235 uint32_t ifindex;
236 };
237 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
238 #endif
239
240 int
241 in6_control(struct socket *so, u_long cmd, caddr_t data,
242 struct ifnet *ifp, struct thread *td)
243 {
244 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
245 struct in6_ifaddr *ia = NULL;
246 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
247 struct sockaddr_in6 *sa6;
248 int carp_attached = 0;
249 int error;
250 u_long ocmd = cmd;
251
252 /*
253 * Compat to make pre-10.x ifconfig(8) operable.
254 */
255 if (cmd == OSIOCAIFADDR_IN6)
256 cmd = SIOCAIFADDR_IN6;
257
258 switch (cmd) {
259 case SIOCGETSGCNT_IN6:
260 case SIOCGETMIFCNT_IN6:
261 /*
262 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
263 * We cannot see how that would be needed, so do not adjust the
264 * KPI blindly; more likely should clean up the IPv4 variant.
265 */
266 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
267 }
268
269 switch (cmd) {
270 case SIOCAADDRCTL_POLICY:
271 case SIOCDADDRCTL_POLICY:
272 if (td != NULL) {
273 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
274 if (error)
275 return (error);
276 }
277 return (in6_src_ioctl(cmd, data));
278 }
279
280 if (ifp == NULL)
281 return (EOPNOTSUPP);
282
283 switch (cmd) {
284 case SIOCSNDFLUSH_IN6:
285 case SIOCSPFXFLUSH_IN6:
286 case SIOCSRTRFLUSH_IN6:
287 case SIOCSDEFIFACE_IN6:
288 case SIOCSIFINFO_FLAGS:
289 case SIOCSIFINFO_IN6:
290 if (td != NULL) {
291 error = priv_check(td, PRIV_NETINET_ND6);
292 if (error)
293 return (error);
294 }
295 /* FALLTHROUGH */
296 case OSIOCGIFINFO_IN6:
297 case SIOCGIFINFO_IN6:
298 case SIOCGNBRINFO_IN6:
299 case SIOCGDEFIFACE_IN6:
300 return (nd6_ioctl(cmd, data, ifp));
301
302 #ifdef COMPAT_FREEBSD32
303 case SIOCGDEFIFACE32_IN6:
304 {
305 struct in6_ndifreq ndif;
306 struct in6_ndifreq32 *ndif32;
307
308 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
309 ifp);
310 if (error)
311 return (error);
312 ndif32 = (struct in6_ndifreq32 *)data;
313 ndif32->ifindex = ndif.ifindex;
314 return (0);
315 }
316 #endif
317 }
318
319 switch (cmd) {
320 case SIOCSIFPREFIX_IN6:
321 case SIOCDIFPREFIX_IN6:
322 case SIOCAIFPREFIX_IN6:
323 case SIOCCIFPREFIX_IN6:
324 case SIOCSGIFPREFIX_IN6:
325 case SIOCGIFPREFIX_IN6:
326 log(LOG_NOTICE,
327 "prefix ioctls are now invalidated. "
328 "please use ifconfig.\n");
329 return (EOPNOTSUPP);
330 }
331
332 switch (cmd) {
333 case SIOCSSCOPE6:
334 if (td != NULL) {
335 error = priv_check(td, PRIV_NETINET_SCOPE6);
336 if (error)
337 return (error);
338 }
339 /* FALLTHROUGH */
340 case SIOCGSCOPE6:
341 case SIOCGSCOPE6DEF:
342 return (scope6_ioctl(cmd, data, ifp));
343 }
344
345 /*
346 * Find address for this interface, if it exists.
347 *
348 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
349 * only, and used the first interface address as the target of other
350 * operations (without checking ifra_addr). This was because netinet
351 * code/API assumed at most 1 interface address per interface.
352 * Since IPv6 allows a node to assign multiple addresses
353 * on a single interface, we almost always look and check the
354 * presence of ifra_addr, and reject invalid ones here.
355 * It also decreases duplicated code among SIOC*_IN6 operations.
356 */
357 switch (cmd) {
358 case SIOCAIFADDR_IN6:
359 case SIOCSIFPHYADDR_IN6:
360 sa6 = &ifra->ifra_addr;
361 break;
362 case SIOCSIFADDR_IN6:
363 case SIOCGIFADDR_IN6:
364 case SIOCSIFDSTADDR_IN6:
365 case SIOCSIFNETMASK_IN6:
366 case SIOCGIFDSTADDR_IN6:
367 case SIOCGIFNETMASK_IN6:
368 case SIOCDIFADDR_IN6:
369 case SIOCGIFPSRCADDR_IN6:
370 case SIOCGIFPDSTADDR_IN6:
371 case SIOCGIFAFLAG_IN6:
372 case SIOCSNDFLUSH_IN6:
373 case SIOCSPFXFLUSH_IN6:
374 case SIOCSRTRFLUSH_IN6:
375 case SIOCGIFALIFETIME_IN6:
376 case SIOCGIFSTAT_IN6:
377 case SIOCGIFSTAT_ICMP6:
378 sa6 = &ifr->ifr_addr;
379 break;
380 case SIOCSIFADDR:
381 case SIOCSIFBRDADDR:
382 case SIOCSIFDSTADDR:
383 case SIOCSIFNETMASK:
384 /*
385 * Although we should pass any non-INET6 ioctl requests
386 * down to driver, we filter some legacy INET requests.
387 * Drivers trust SIOCSIFADDR et al to come from an already
388 * privileged layer, and do not perform any credentials
389 * checks or input validation.
390 */
391 return (EINVAL);
392 default:
393 sa6 = NULL;
394 break;
395 }
396 if (sa6 && sa6->sin6_family == AF_INET6) {
397 if (sa6->sin6_scope_id != 0)
398 error = sa6_embedscope(sa6, 0);
399 else
400 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
401 if (error != 0)
402 return (error);
403 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
404 &sa6->sin6_addr)) != 0)
405 return (error);
406 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
407 } else
408 ia = NULL;
409
410 switch (cmd) {
411 case SIOCSIFADDR_IN6:
412 case SIOCSIFDSTADDR_IN6:
413 case SIOCSIFNETMASK_IN6:
414 /*
415 * Since IPv6 allows a node to assign multiple addresses
416 * on a single interface, SIOCSIFxxx ioctls are deprecated.
417 */
418 /* we decided to obsolete this command (20000704) */
419 error = EINVAL;
420 goto out;
421
422 case SIOCDIFADDR_IN6:
423 /*
424 * for IPv4, we look for existing in_ifaddr here to allow
425 * "ifconfig if0 delete" to remove the first IPv4 address on
426 * the interface. For IPv6, as the spec allows multiple
427 * interface address from the day one, we consider "remove the
428 * first one" semantics to be not preferable.
429 */
430 if (ia == NULL) {
431 error = EADDRNOTAVAIL;
432 goto out;
433 }
434 /* FALLTHROUGH */
435 case SIOCAIFADDR_IN6:
436 /*
437 * We always require users to specify a valid IPv6 address for
438 * the corresponding operation.
439 */
440 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
441 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
442 error = EAFNOSUPPORT;
443 goto out;
444 }
445
446 if (td != NULL) {
447 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
448 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
449 if (error)
450 goto out;
451 }
452 /* FALLTHROUGH */
453 case SIOCGIFSTAT_IN6:
454 case SIOCGIFSTAT_ICMP6:
455 if (ifp->if_afdata[AF_INET6] == NULL) {
456 error = EPFNOSUPPORT;
457 goto out;
458 }
459 break;
460
461 case SIOCGIFADDR_IN6:
462 /* This interface is basically deprecated. use SIOCGIFCONF. */
463 /* FALLTHROUGH */
464 case SIOCGIFAFLAG_IN6:
465 case SIOCGIFNETMASK_IN6:
466 case SIOCGIFDSTADDR_IN6:
467 case SIOCGIFALIFETIME_IN6:
468 /* must think again about its semantics */
469 if (ia == NULL) {
470 error = EADDRNOTAVAIL;
471 goto out;
472 }
473 break;
474 }
475
476 switch (cmd) {
477 case SIOCGIFADDR_IN6:
478 ifr->ifr_addr = ia->ia_addr;
479 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
480 goto out;
481 break;
482
483 case SIOCGIFDSTADDR_IN6:
484 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
485 error = EINVAL;
486 goto out;
487 }
488 ifr->ifr_dstaddr = ia->ia_dstaddr;
489 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
490 goto out;
491 break;
492
493 case SIOCGIFNETMASK_IN6:
494 ifr->ifr_addr = ia->ia_prefixmask;
495 break;
496
497 case SIOCGIFAFLAG_IN6:
498 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
499 break;
500
501 case SIOCGIFSTAT_IN6:
502 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
503 ifp->if_afdata[AF_INET6])->in6_ifstat,
504 &ifr->ifr_ifru.ifru_stat,
505 sizeof(struct in6_ifstat) / sizeof(uint64_t));
506 break;
507
508 case SIOCGIFSTAT_ICMP6:
509 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
510 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
511 &ifr->ifr_ifru.ifru_icmp6stat,
512 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
513 break;
514
515 case SIOCGIFALIFETIME_IN6:
516 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
517 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
518 time_t maxexpire;
519 struct in6_addrlifetime *retlt =
520 &ifr->ifr_ifru.ifru_lifetime;
521
522 /*
523 * XXX: adjust expiration time assuming time_t is
524 * signed.
525 */
526 maxexpire = (-1) &
527 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
528 if (ia->ia6_lifetime.ia6t_vltime <
529 maxexpire - ia->ia6_updatetime) {
530 retlt->ia6t_expire = ia->ia6_updatetime +
531 ia->ia6_lifetime.ia6t_vltime;
532 } else
533 retlt->ia6t_expire = maxexpire;
534 }
535 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
536 time_t maxexpire;
537 struct in6_addrlifetime *retlt =
538 &ifr->ifr_ifru.ifru_lifetime;
539
540 /*
541 * XXX: adjust expiration time assuming time_t is
542 * signed.
543 */
544 maxexpire = (-1) &
545 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
546 if (ia->ia6_lifetime.ia6t_pltime <
547 maxexpire - ia->ia6_updatetime) {
548 retlt->ia6t_preferred = ia->ia6_updatetime +
549 ia->ia6_lifetime.ia6t_pltime;
550 } else
551 retlt->ia6t_preferred = maxexpire;
552 }
553 break;
554
555 case SIOCAIFADDR_IN6:
556 {
557 struct nd_prefixctl pr0;
558 struct nd_prefix *pr;
559
560 /*
561 * first, make or update the interface address structure,
562 * and link it to the list.
563 */
564 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
565 goto out;
566 if (ia != NULL) {
567 if (ia->ia_ifa.ifa_carp)
568 (*carp_detach_p)(&ia->ia_ifa, true);
569 ifa_free(&ia->ia_ifa);
570 }
571 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
572 == NULL) {
573 /*
574 * this can happen when the user specify the 0 valid
575 * lifetime.
576 */
577 break;
578 }
579
580 if (cmd == ocmd && ifra->ifra_vhid > 0) {
581 if (carp_attach_p != NULL)
582 error = (*carp_attach_p)(&ia->ia_ifa,
583 ifra->ifra_vhid);
584 else
585 error = EPROTONOSUPPORT;
586 if (error)
587 goto out;
588 else
589 carp_attached = 1;
590 }
591
592 /*
593 * then, make the prefix on-link on the interface.
594 * XXX: we'd rather create the prefix before the address, but
595 * we need at least one address to install the corresponding
596 * interface route, so we configure the address first.
597 */
598
599 /*
600 * convert mask to prefix length (prefixmask has already
601 * been validated in in6_update_ifa().
602 */
603 bzero(&pr0, sizeof(pr0));
604 pr0.ndpr_ifp = ifp;
605 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
606 NULL);
607 if (pr0.ndpr_plen == 128) {
608 /* we don't need to install a host route. */
609 goto aifaddr_out;
610 }
611 pr0.ndpr_prefix = ifra->ifra_addr;
612 /* apply the mask for safety. */
613 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
614 &ifra->ifra_prefixmask.sin6_addr);
615
616 /*
617 * XXX: since we don't have an API to set prefix (not address)
618 * lifetimes, we just use the same lifetimes as addresses.
619 * The (temporarily) installed lifetimes can be overridden by
620 * later advertised RAs (when accept_rtadv is non 0), which is
621 * an intended behavior.
622 */
623 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
624 pr0.ndpr_raf_auto =
625 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
626 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
627 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
628
629 /* add the prefix if not yet. */
630 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
631 /*
632 * nd6_prelist_add will install the corresponding
633 * interface route.
634 */
635 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
636 if (carp_attached)
637 (*carp_detach_p)(&ia->ia_ifa, false);
638 goto out;
639 }
640 }
641
642 /* relate the address to the prefix */
643 if (ia->ia6_ndpr == NULL) {
644 ia->ia6_ndpr = pr;
645 pr->ndpr_addrcnt++;
646
647 /*
648 * If this is the first autoconf address from the
649 * prefix, create a temporary address as well
650 * (when required).
651 */
652 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
653 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) {
654 int e;
655 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
656 log(LOG_NOTICE, "in6_control: failed "
657 "to create a temporary address, "
658 "errno=%d\n", e);
659 }
660 }
661 }
662 nd6_prefix_rele(pr);
663
664 /*
665 * this might affect the status of autoconfigured addresses,
666 * that is, this address might make other addresses detached.
667 */
668 pfxlist_onlink_check();
669
670 aifaddr_out:
671 /*
672 * Try to clear the flag when a new IPv6 address is added
673 * onto an IFDISABLED interface and it succeeds.
674 */
675 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
676 struct in6_ndireq nd;
677
678 memset(&nd, 0, sizeof(nd));
679 nd.ndi.flags = ND_IFINFO(ifp)->flags;
680 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
681 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
682 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
683 "SIOCSIFINFO_FLAGS for -ifdisabled "
684 "failed.");
685 /*
686 * Ignore failure of clearing the flag intentionally.
687 * The failure means address duplication was detected.
688 */
689 }
690 break;
691 }
692
693 case SIOCDIFADDR_IN6:
694 {
695 struct nd_prefix *pr;
696
697 /*
698 * If the address being deleted is the only one that owns
699 * the corresponding prefix, expire the prefix as well.
700 * XXX: theoretically, we don't have to worry about such
701 * relationship, since we separate the address management
702 * and the prefix management. We do this, however, to provide
703 * as much backward compatibility as possible in terms of
704 * the ioctl operation.
705 * Note that in6_purgeaddr() will decrement ndpr_addrcnt.
706 */
707 pr = ia->ia6_ndpr;
708 in6_purgeaddr(&ia->ia_ifa);
709 if (pr != NULL && pr->ndpr_addrcnt == 0) {
710 ND6_WLOCK();
711 nd6_prefix_unlink(pr, NULL);
712 ND6_WUNLOCK();
713 nd6_prefix_del(pr);
714 }
715 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
716 break;
717 }
718
719 default:
720 if (ifp->if_ioctl == NULL) {
721 error = EOPNOTSUPP;
722 goto out;
723 }
724 error = (*ifp->if_ioctl)(ifp, cmd, data);
725 goto out;
726 }
727
728 error = 0;
729 out:
730 if (ia != NULL)
731 ifa_free(&ia->ia_ifa);
732 return (error);
733 }
734
735
736 static struct in6_multi_mship *
737 in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr,
738 int *errorp, int delay)
739 {
740 struct in6_multi_mship *imm;
741 int error;
742
743 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT);
744 if (imm == NULL) {
745 *errorp = ENOBUFS;
746 return (NULL);
747 }
748
749 delay = (delay * PR_FASTHZ) / hz;
750
751 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay);
752 if (error) {
753 *errorp = error;
754 free(imm, M_IP6MADDR);
755 return (NULL);
756 }
757
758 return (imm);
759 }
760 /*
761 * Join necessary multicast groups. Factored out from in6_update_ifa().
762 * This entire work should only be done once, for the default FIB.
763 */
764 static int
765 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
766 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
767 {
768 char ip6buf[INET6_ADDRSTRLEN];
769 struct in6_addr mltaddr;
770 struct in6_multi_mship *imm;
771 int delay, error;
772
773 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
774
775 /* Join solicited multicast addr for new host id. */
776 bzero(&mltaddr, sizeof(struct in6_addr));
777 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
778 mltaddr.s6_addr32[2] = htonl(1);
779 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
780 mltaddr.s6_addr8[12] = 0xff;
781 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
782 /* XXX: should not happen */
783 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
784 goto cleanup;
785 }
786 delay = error = 0;
787 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
788 /*
789 * We need a random delay for DAD on the address being
790 * configured. It also means delaying transmission of the
791 * corresponding MLD report to avoid report collision.
792 * [RFC 4861, Section 6.3.7]
793 */
794 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
795 }
796 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
797 if (imm == NULL) {
798 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
799 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
800 if_name(ifp), error));
801 goto cleanup;
802 }
803 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
804 *in6m_sol = imm->i6mm_maddr;
805
806 /*
807 * Join link-local all-nodes address.
808 */
809 mltaddr = in6addr_linklocal_allnodes;
810 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
811 goto cleanup; /* XXX: should not fail */
812
813 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
814 if (imm == NULL) {
815 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
816 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
817 if_name(ifp), error));
818 goto cleanup;
819 }
820 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
821
822 /*
823 * Join node information group address.
824 */
825 delay = 0;
826 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
827 /*
828 * The spec does not say anything about delay for this group,
829 * but the same logic should apply.
830 */
831 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
832 }
833 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
834 /* XXX jinmei */
835 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
836 if (imm == NULL)
837 nd6log((LOG_WARNING,
838 "%s: in6_joingroup failed for %s on %s "
839 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
840 &mltaddr), if_name(ifp), error));
841 /* XXX not very fatal, go on... */
842 else
843 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
844 }
845 if (V_icmp6_nodeinfo_oldmcprefix &&
846 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
847 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
848 if (imm == NULL)
849 nd6log((LOG_WARNING,
850 "%s: in6_joingroup failed for %s on %s "
851 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
852 &mltaddr), if_name(ifp), error));
853 /* XXX not very fatal, go on... */
854 else
855 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
856 }
857
858 /*
859 * Join interface-local all-nodes address.
860 * (ff01::1%ifN, and ff01::%ifN/32)
861 */
862 mltaddr = in6addr_nodelocal_allnodes;
863 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
864 goto cleanup; /* XXX: should not fail */
865
866 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
867 if (imm == NULL) {
868 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
869 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
870 &mltaddr), if_name(ifp), error));
871 goto cleanup;
872 }
873 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
874
875 cleanup:
876 return (error);
877 }
878
879 /*
880 * Update parameters of an IPv6 interface address.
881 * If necessary, a new entry is created and linked into address chains.
882 * This function is separated from in6_control().
883 */
884 int
885 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
886 struct in6_ifaddr *ia, int flags)
887 {
888 int error, hostIsNew = 0;
889
890 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
891 return (error);
892
893 if (ia == NULL) {
894 hostIsNew = 1;
895 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
896 return (ENOBUFS);
897 }
898
899 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
900 if (error != 0) {
901 if (hostIsNew != 0) {
902 in6_unlink_ifa(ia, ifp);
903 ifa_free(&ia->ia_ifa);
904 }
905 return (error);
906 }
907
908 if (hostIsNew)
909 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
910
911 return (error);
912 }
913
914 /*
915 * Fill in basic IPv6 address request info.
916 */
917 void
918 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
919 const struct in6_addr *mask)
920 {
921
922 memset(ifra, 0, sizeof(struct in6_aliasreq));
923
924 ifra->ifra_addr.sin6_family = AF_INET6;
925 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
926 if (addr != NULL)
927 ifra->ifra_addr.sin6_addr = *addr;
928
929 ifra->ifra_prefixmask.sin6_family = AF_INET6;
930 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
931 if (mask != NULL)
932 ifra->ifra_prefixmask.sin6_addr = *mask;
933 }
934
935 static int
936 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
937 struct in6_ifaddr *ia, int flags)
938 {
939 int plen = -1;
940 struct sockaddr_in6 dst6;
941 struct in6_addrlifetime *lt;
942 char ip6buf[INET6_ADDRSTRLEN];
943
944 /* Validate parameters */
945 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
946 return (EINVAL);
947
948 /*
949 * The destination address for a p2p link must have a family
950 * of AF_UNSPEC or AF_INET6.
951 */
952 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
953 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
954 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
955 return (EAFNOSUPPORT);
956
957 /*
958 * Validate address
959 */
960 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
961 ifra->ifra_addr.sin6_family != AF_INET6)
962 return (EINVAL);
963
964 /*
965 * validate ifra_prefixmask. don't check sin6_family, netmask
966 * does not carry fields other than sin6_len.
967 */
968 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
969 return (EINVAL);
970 /*
971 * Because the IPv6 address architecture is classless, we require
972 * users to specify a (non 0) prefix length (mask) for a new address.
973 * We also require the prefix (when specified) mask is valid, and thus
974 * reject a non-consecutive mask.
975 */
976 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
977 return (EINVAL);
978 if (ifra->ifra_prefixmask.sin6_len != 0) {
979 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
980 (u_char *)&ifra->ifra_prefixmask +
981 ifra->ifra_prefixmask.sin6_len);
982 if (plen <= 0)
983 return (EINVAL);
984 } else {
985 /*
986 * In this case, ia must not be NULL. We just use its prefix
987 * length.
988 */
989 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
990 }
991 /*
992 * If the destination address on a p2p interface is specified,
993 * and the address is a scoped one, validate/set the scope
994 * zone identifier.
995 */
996 dst6 = ifra->ifra_dstaddr;
997 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
998 (dst6.sin6_family == AF_INET6)) {
999 struct in6_addr in6_tmp;
1000 u_int32_t zoneid;
1001
1002 in6_tmp = dst6.sin6_addr;
1003 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1004 return (EINVAL); /* XXX: should be impossible */
1005
1006 if (dst6.sin6_scope_id != 0) {
1007 if (dst6.sin6_scope_id != zoneid)
1008 return (EINVAL);
1009 } else /* user omit to specify the ID. */
1010 dst6.sin6_scope_id = zoneid;
1011
1012 /* convert into the internal form */
1013 if (sa6_embedscope(&dst6, 0))
1014 return (EINVAL); /* XXX: should be impossible */
1015 }
1016 /* Modify original ifra_dstaddr to reflect changes */
1017 ifra->ifra_dstaddr = dst6;
1018
1019 /*
1020 * The destination address can be specified only for a p2p or a
1021 * loopback interface. If specified, the corresponding prefix length
1022 * must be 128.
1023 */
1024 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1025 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1026 /* XXX: noisy message */
1027 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1028 "be specified for a p2p or a loopback IF only\n"));
1029 return (EINVAL);
1030 }
1031 if (plen != 128) {
1032 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1033 "be 128 when dstaddr is specified\n"));
1034 return (EINVAL);
1035 }
1036 }
1037 /* lifetime consistency check */
1038 lt = &ifra->ifra_lifetime;
1039 if (lt->ia6t_pltime > lt->ia6t_vltime)
1040 return (EINVAL);
1041 if (lt->ia6t_vltime == 0) {
1042 /*
1043 * the following log might be noisy, but this is a typical
1044 * configuration mistake or a tool's bug.
1045 */
1046 nd6log((LOG_INFO,
1047 "in6_update_ifa: valid lifetime is 0 for %s\n",
1048 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1049
1050 if (ia == NULL)
1051 return (0); /* there's nothing to do */
1052 }
1053
1054 /* Check prefix mask */
1055 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1056 /*
1057 * We prohibit changing the prefix length of an existing
1058 * address, because
1059 * + such an operation should be rare in IPv6, and
1060 * + the operation would confuse prefix management.
1061 */
1062 if (ia->ia_prefixmask.sin6_len != 0 &&
1063 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1064 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1065 "of an existing %s address should not be changed\n",
1066 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1067
1068 return (EINVAL);
1069 }
1070 }
1071
1072 return (0);
1073 }
1074
1075
1076 /*
1077 * Allocate a new ifaddr and link it into chains.
1078 */
1079 static struct in6_ifaddr *
1080 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1081 {
1082 struct in6_ifaddr *ia;
1083
1084 /*
1085 * When in6_alloc_ifa() is called in a process of a received
1086 * RA, it is called under an interrupt context. So, we should
1087 * call malloc with M_NOWAIT.
1088 */
1089 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1090 if (ia == NULL)
1091 return (NULL);
1092 LIST_INIT(&ia->ia6_memberships);
1093 /* Initialize the address and masks, and put time stamp */
1094 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1095 ia->ia_addr.sin6_family = AF_INET6;
1096 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1097 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1098 ia->ia_addr = ifra->ifra_addr;
1099 ia->ia6_createtime = time_uptime;
1100 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1101 /*
1102 * Some functions expect that ifa_dstaddr is not
1103 * NULL for p2p interfaces.
1104 */
1105 ia->ia_ifa.ifa_dstaddr =
1106 (struct sockaddr *)&ia->ia_dstaddr;
1107 } else {
1108 ia->ia_ifa.ifa_dstaddr = NULL;
1109 }
1110
1111 /* set prefix mask if any */
1112 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1113 if (ifra->ifra_prefixmask.sin6_len != 0) {
1114 ia->ia_prefixmask.sin6_family = AF_INET6;
1115 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1116 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1117 }
1118
1119 ia->ia_ifp = ifp;
1120 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1121 IF_ADDR_WLOCK(ifp);
1122 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1123 IF_ADDR_WUNLOCK(ifp);
1124
1125 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1126 IN6_IFADDR_WLOCK();
1127 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1128 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1129 IN6_IFADDR_WUNLOCK();
1130
1131 return (ia);
1132 }
1133
1134 /*
1135 * Update/configure interface address parameters:
1136 *
1137 * 1) Update lifetime
1138 * 2) Update interface metric ad flags
1139 * 3) Notify other subsystems
1140 */
1141 static int
1142 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1143 struct in6_ifaddr *ia, int hostIsNew, int flags)
1144 {
1145 int error;
1146
1147 /* update timestamp */
1148 ia->ia6_updatetime = time_uptime;
1149
1150 /*
1151 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1152 * to see if the address is deprecated or invalidated, but initialize
1153 * these members for applications.
1154 */
1155 ia->ia6_lifetime = ifra->ifra_lifetime;
1156 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1157 ia->ia6_lifetime.ia6t_expire =
1158 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1159 } else
1160 ia->ia6_lifetime.ia6t_expire = 0;
1161 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1162 ia->ia6_lifetime.ia6t_preferred =
1163 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1164 } else
1165 ia->ia6_lifetime.ia6t_preferred = 0;
1166
1167 /*
1168 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1169 * userland, make it deprecated.
1170 */
1171 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1172 ia->ia6_lifetime.ia6t_pltime = 0;
1173 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1174 }
1175
1176 /*
1177 * configure address flags.
1178 */
1179 ia->ia6_flags = ifra->ifra_flags;
1180
1181 /*
1182 * Make the address tentative before joining multicast addresses,
1183 * so that corresponding MLD responses would not have a tentative
1184 * source address.
1185 */
1186 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1187
1188 /*
1189 * DAD should be performed for an new address or addresses on
1190 * an interface with ND6_IFF_IFDISABLED.
1191 */
1192 if (in6if_do_dad(ifp) &&
1193 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1194 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1195
1196 /* notify other subsystems */
1197 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1198
1199 return (error);
1200 }
1201
1202 /*
1203 * Do link-level ifa job:
1204 * 1) Add lle entry for added address
1205 * 2) Notifies routing socket users about new address
1206 * 3) join appropriate multicast group
1207 * 4) start DAD if enabled
1208 */
1209 static int
1210 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1211 struct in6_ifaddr *ia, int flags)
1212 {
1213 struct in6_multi *in6m_sol;
1214 int error = 0;
1215
1216 /* Add local address to lltable, if necessary (ex. on p2p link). */
1217 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1218 in6_purgeaddr(&ia->ia_ifa);
1219 ifa_free(&ia->ia_ifa);
1220 return (error);
1221 }
1222
1223 /* Join necessary multicast groups. */
1224 in6m_sol = NULL;
1225 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1226 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1227 if (error != 0) {
1228 in6_purgeaddr(&ia->ia_ifa);
1229 ifa_free(&ia->ia_ifa);
1230 return (error);
1231 }
1232 }
1233
1234 /* Perform DAD, if the address is TENTATIVE. */
1235 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1236 int delay, mindelay, maxdelay;
1237
1238 delay = 0;
1239 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1240 /*
1241 * We need to impose a delay before sending an NS
1242 * for DAD. Check if we also needed a delay for the
1243 * corresponding MLD message. If we did, the delay
1244 * should be larger than the MLD delay (this could be
1245 * relaxed a bit, but this simple logic is at least
1246 * safe).
1247 * XXX: Break data hiding guidelines and look at
1248 * state for the solicited multicast group.
1249 */
1250 mindelay = 0;
1251 if (in6m_sol != NULL &&
1252 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1253 mindelay = in6m_sol->in6m_timer;
1254 }
1255 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1256 if (maxdelay - mindelay == 0)
1257 delay = 0;
1258 else {
1259 delay =
1260 (arc4random() % (maxdelay - mindelay)) +
1261 mindelay;
1262 }
1263 }
1264 nd6_dad_start((struct ifaddr *)ia, delay);
1265 }
1266
1267 in6_newaddrmsg(ia, RTM_ADD);
1268 ifa_free(&ia->ia_ifa);
1269 return (error);
1270 }
1271
1272 void
1273 in6_purgeaddr(struct ifaddr *ifa)
1274 {
1275 struct ifnet *ifp = ifa->ifa_ifp;
1276 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1277 struct in6_multi_mship *imm;
1278 int plen, error;
1279
1280 if (ifa->ifa_carp)
1281 (*carp_detach_p)(ifa, false);
1282
1283 /*
1284 * Remove the loopback route to the interface address.
1285 * The check for the current setting of "nd6_useloopback"
1286 * is not needed.
1287 */
1288 if (ia->ia_flags & IFA_RTSELF) {
1289 error = ifa_del_loopback_route((struct ifaddr *)ia,
1290 (struct sockaddr *)&ia->ia_addr);
1291 if (error == 0)
1292 ia->ia_flags &= ~IFA_RTSELF;
1293 }
1294
1295 /* stop DAD processing */
1296 nd6_dad_stop(ifa);
1297
1298 /* Leave multicast groups. */
1299 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1300 LIST_REMOVE(imm, i6mm_chain);
1301 if (imm->i6mm_maddr != NULL)
1302 in6_leavegroup(imm->i6mm_maddr, NULL);
1303 free(imm, M_IP6MADDR);
1304 }
1305 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1306 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1307 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1308 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0));
1309 if (error != 0)
1310 log(LOG_INFO, "%s: err=%d, destination address delete "
1311 "failed\n", __func__, error);
1312 ia->ia_flags &= ~IFA_ROUTE;
1313 }
1314
1315 in6_newaddrmsg(ia, RTM_DELETE);
1316 in6_unlink_ifa(ia, ifp);
1317 }
1318
1319 static void
1320 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1321 {
1322 char ip6buf[INET6_ADDRSTRLEN];
1323 int remove_lle;
1324
1325 IF_ADDR_WLOCK(ifp);
1326 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link);
1327 IF_ADDR_WUNLOCK(ifp);
1328 ifa_free(&ia->ia_ifa); /* if_addrhead */
1329
1330 /*
1331 * Defer the release of what might be the last reference to the
1332 * in6_ifaddr so that it can't be freed before the remainder of the
1333 * cleanup.
1334 */
1335 IN6_IFADDR_WLOCK();
1336 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link);
1337 CK_LIST_REMOVE(ia, ia6_hash);
1338 IN6_IFADDR_WUNLOCK();
1339
1340 /*
1341 * Release the reference to the base prefix. There should be a
1342 * positive reference.
1343 */
1344 remove_lle = 0;
1345 if (ia->ia6_ndpr == NULL) {
1346 nd6log((LOG_NOTICE,
1347 "in6_unlink_ifa: autoconf'ed address "
1348 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1349 } else {
1350 ia->ia6_ndpr->ndpr_addrcnt--;
1351 /* Do not delete lles within prefix if refcont != 0 */
1352 if (ia->ia6_ndpr->ndpr_addrcnt == 0)
1353 remove_lle = 1;
1354 ia->ia6_ndpr = NULL;
1355 }
1356
1357 nd6_rem_ifa_lle(ia, remove_lle);
1358
1359 /*
1360 * Also, if the address being removed is autoconf'ed, call
1361 * pfxlist_onlink_check() since the release might affect the status of
1362 * other (detached) addresses.
1363 */
1364 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1365 pfxlist_onlink_check();
1366 }
1367 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1368 }
1369
1370 /*
1371 * Notifies other subsystems about address change/arrival:
1372 * 1) Notifies device handler on the first IPv6 address assignment
1373 * 2) Handle routing table changes for P2P links and route
1374 * 3) Handle routing table changes for address host route
1375 */
1376 static int
1377 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1378 struct in6_aliasreq *ifra, int hostIsNew)
1379 {
1380 int error = 0, plen, ifacount = 0;
1381 struct ifaddr *ifa;
1382 struct sockaddr_in6 *pdst;
1383 char ip6buf[INET6_ADDRSTRLEN];
1384
1385 /*
1386 * Give the interface a chance to initialize
1387 * if this is its first address,
1388 */
1389 if (hostIsNew != 0) {
1390 IF_ADDR_RLOCK(ifp);
1391 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1392 if (ifa->ifa_addr->sa_family != AF_INET6)
1393 continue;
1394 ifacount++;
1395 }
1396 IF_ADDR_RUNLOCK(ifp);
1397 }
1398
1399 if (ifacount <= 1 && ifp->if_ioctl) {
1400 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1401 if (error)
1402 goto done;
1403 }
1404
1405 /*
1406 * If a new destination address is specified, scrub the old one and
1407 * install the new destination. Note that the interface must be
1408 * p2p or loopback.
1409 */
1410 pdst = &ifra->ifra_dstaddr;
1411 if (pdst->sin6_family == AF_INET6 &&
1412 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1413 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1414 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1415 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1416 "remove a route to the old destination: %s\n",
1417 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1418 /* proceed anyway... */
1419 } else
1420 ia->ia_flags &= ~IFA_ROUTE;
1421 ia->ia_dstaddr = *pdst;
1422 }
1423
1424 /*
1425 * If a new destination address is specified for a point-to-point
1426 * interface, install a route to the destination as an interface
1427 * direct route.
1428 * XXX: the logic below rejects assigning multiple addresses on a p2p
1429 * interface that share the same destination.
1430 */
1431 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1432 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1433 ia->ia_dstaddr.sin6_family == AF_INET6) {
1434 int rtflags = RTF_UP | RTF_HOST;
1435 /*
1436 * Handle the case for ::1 .
1437 */
1438 if (ifp->if_flags & IFF_LOOPBACK)
1439 ia->ia_flags |= IFA_RTSELF;
1440 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1441 if (error)
1442 goto done;
1443 ia->ia_flags |= IFA_ROUTE;
1444 }
1445
1446 /*
1447 * add a loopback route to self if not exists
1448 */
1449 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1450 error = ifa_add_loopback_route((struct ifaddr *)ia,
1451 (struct sockaddr *)&ia->ia_addr);
1452 if (error == 0)
1453 ia->ia_flags |= IFA_RTSELF;
1454 }
1455 done:
1456 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1457 "Invoking IPv6 network device address event may sleep");
1458
1459 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
1460
1461 return (error);
1462 }
1463
1464 /*
1465 * Find an IPv6 interface link-local address specific to an interface.
1466 * ifaddr is returned referenced.
1467 */
1468 struct in6_ifaddr *
1469 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1470 {
1471 struct ifaddr *ifa;
1472
1473 IF_ADDR_RLOCK(ifp);
1474 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1475 if (ifa->ifa_addr->sa_family != AF_INET6)
1476 continue;
1477 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1478 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1479 ignoreflags) != 0)
1480 continue;
1481 ifa_ref(ifa);
1482 break;
1483 }
1484 }
1485 IF_ADDR_RUNLOCK(ifp);
1486
1487 return ((struct in6_ifaddr *)ifa);
1488 }
1489
1490
1491 /*
1492 * find the interface address corresponding to a given IPv6 address.
1493 * ifaddr is returned referenced.
1494 */
1495 struct in6_ifaddr *
1496 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1497 {
1498 struct rm_priotracker in6_ifa_tracker;
1499 struct in6_ifaddr *ia;
1500
1501 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1502 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1503 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1504 if (zoneid != 0 &&
1505 zoneid != ia->ia_addr.sin6_scope_id)
1506 continue;
1507 ifa_ref(&ia->ia_ifa);
1508 break;
1509 }
1510 }
1511 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1512 return (ia);
1513 }
1514
1515 /*
1516 * find the internet address corresponding to a given interface and address.
1517 * ifaddr is returned referenced.
1518 */
1519 struct in6_ifaddr *
1520 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1521 {
1522 struct ifaddr *ifa;
1523
1524 IF_ADDR_RLOCK(ifp);
1525 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1526 if (ifa->ifa_addr->sa_family != AF_INET6)
1527 continue;
1528 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1529 ifa_ref(ifa);
1530 break;
1531 }
1532 }
1533 IF_ADDR_RUNLOCK(ifp);
1534
1535 return ((struct in6_ifaddr *)ifa);
1536 }
1537
1538 /*
1539 * Find a link-local scoped address on ifp and return it if any.
1540 */
1541 struct in6_ifaddr *
1542 in6ifa_llaonifp(struct ifnet *ifp)
1543 {
1544 struct sockaddr_in6 *sin6;
1545 struct ifaddr *ifa;
1546
1547 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1548 return (NULL);
1549 IF_ADDR_RLOCK(ifp);
1550 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1551 if (ifa->ifa_addr->sa_family != AF_INET6)
1552 continue;
1553 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1554 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1555 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1556 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1557 break;
1558 }
1559 IF_ADDR_RUNLOCK(ifp);
1560
1561 return ((struct in6_ifaddr *)ifa);
1562 }
1563
1564 /*
1565 * Convert IP6 address to printable (loggable) representation. Caller
1566 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1567 */
1568 static char digits[] = "0123456789abcdef";
1569 char *
1570 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1571 {
1572 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1573 char *cp;
1574 const u_int16_t *a = (const u_int16_t *)addr;
1575 const u_int8_t *d;
1576 int dcolon = 0, zero = 0;
1577
1578 cp = ip6buf;
1579
1580 for (i = 0; i < 8; i++) {
1581 if (*(a + i) == 0) {
1582 cnt++;
1583 if (cnt == 1)
1584 idx = i;
1585 }
1586 else if (maxcnt < cnt) {
1587 maxcnt = cnt;
1588 index = idx;
1589 cnt = 0;
1590 }
1591 }
1592 if (maxcnt < cnt) {
1593 maxcnt = cnt;
1594 index = idx;
1595 }
1596
1597 for (i = 0; i < 8; i++) {
1598 if (dcolon == 1) {
1599 if (*a == 0) {
1600 if (i == 7)
1601 *cp++ = ':';
1602 a++;
1603 continue;
1604 } else
1605 dcolon = 2;
1606 }
1607 if (*a == 0) {
1608 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1609 if (i == 0)
1610 *cp++ = ':';
1611 *cp++ = ':';
1612 dcolon = 1;
1613 } else {
1614 *cp++ = '';
1615 *cp++ = ':';
1616 }
1617 a++;
1618 continue;
1619 }
1620 d = (const u_char *)a;
1621 /* Try to eliminate leading zeros in printout like in :0001. */
1622 zero = 1;
1623 *cp = digits[*d >> 4];
1624 if (*cp != '') {
1625 zero = 0;
1626 cp++;
1627 }
1628 *cp = digits[*d++ & 0xf];
1629 if (zero == 0 || (*cp != '')) {
1630 zero = 0;
1631 cp++;
1632 }
1633 *cp = digits[*d >> 4];
1634 if (zero == 0 || (*cp != '')) {
1635 zero = 0;
1636 cp++;
1637 }
1638 *cp++ = digits[*d & 0xf];
1639 *cp++ = ':';
1640 a++;
1641 }
1642 *--cp = '\0';
1643 return (ip6buf);
1644 }
1645
1646 int
1647 in6_localaddr(struct in6_addr *in6)
1648 {
1649 struct rm_priotracker in6_ifa_tracker;
1650 struct in6_ifaddr *ia;
1651
1652 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1653 return 1;
1654
1655 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1656 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1657 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1658 &ia->ia_prefixmask.sin6_addr)) {
1659 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1660 return 1;
1661 }
1662 }
1663 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1664
1665 return (0);
1666 }
1667
1668 /*
1669 * Return 1 if an internet address is for the local host and configured
1670 * on one of its interfaces.
1671 */
1672 int
1673 in6_localip(struct in6_addr *in6)
1674 {
1675 struct rm_priotracker in6_ifa_tracker;
1676 struct in6_ifaddr *ia;
1677
1678 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1679 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1680 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1681 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1682 return (1);
1683 }
1684 }
1685 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1686 return (0);
1687 }
1688
1689 /*
1690 * Return 1 if an internet address is configured on an interface.
1691 */
1692 int
1693 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1694 {
1695 struct in6_addr in6;
1696 struct ifaddr *ifa;
1697 struct in6_ifaddr *ia6;
1698
1699 in6 = *addr;
1700 if (in6_clearscope(&in6))
1701 return (0);
1702 in6_setscope(&in6, ifp, NULL);
1703
1704 IF_ADDR_RLOCK(ifp);
1705 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1706 if (ifa->ifa_addr->sa_family != AF_INET6)
1707 continue;
1708 ia6 = (struct in6_ifaddr *)ifa;
1709 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) {
1710 IF_ADDR_RUNLOCK(ifp);
1711 return (1);
1712 }
1713 }
1714 IF_ADDR_RUNLOCK(ifp);
1715
1716 return (0);
1717 }
1718
1719 int
1720 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1721 {
1722 struct rm_priotracker in6_ifa_tracker;
1723 struct in6_ifaddr *ia;
1724
1725 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1726 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1727 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1728 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1729 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1730 return (1); /* true */
1731 }
1732 break;
1733 }
1734 }
1735 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1736
1737 return (0); /* false */
1738 }
1739
1740 /*
1741 * return length of part which dst and src are equal
1742 * hard coding...
1743 */
1744 int
1745 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1746 {
1747 int match = 0;
1748 u_char *s = (u_char *)src, *d = (u_char *)dst;
1749 u_char *lim = s + 16, r;
1750
1751 while (s < lim)
1752 if ((r = (*d++ ^ *s++)) != 0) {
1753 while (r < 128) {
1754 match++;
1755 r <<= 1;
1756 }
1757 break;
1758 } else
1759 match += 8;
1760 return match;
1761 }
1762
1763 /* XXX: to be scope conscious */
1764 int
1765 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1766 {
1767 int bytelen, bitlen;
1768
1769 /* sanity check */
1770 if (0 > len || len > 128) {
1771 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1772 len);
1773 return (0);
1774 }
1775
1776 bytelen = len / 8;
1777 bitlen = len % 8;
1778
1779 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1780 return (0);
1781 if (bitlen != 0 &&
1782 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1783 p2->s6_addr[bytelen] >> (8 - bitlen))
1784 return (0);
1785
1786 return (1);
1787 }
1788
1789 void
1790 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1791 {
1792 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1793 int bytelen, bitlen, i;
1794
1795 /* sanity check */
1796 if (0 > len || len > 128) {
1797 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1798 len);
1799 return;
1800 }
1801
1802 bzero(maskp, sizeof(*maskp));
1803 bytelen = len / 8;
1804 bitlen = len % 8;
1805 for (i = 0; i < bytelen; i++)
1806 maskp->s6_addr[i] = 0xff;
1807 if (bitlen)
1808 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1809 }
1810
1811 /*
1812 * return the best address out of the same scope. if no address was
1813 * found, return the first valid address from designated IF.
1814 */
1815 struct in6_ifaddr *
1816 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1817 {
1818 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1819 struct ifaddr *ifa;
1820 struct in6_ifaddr *besta = NULL;
1821 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1822
1823 dep[0] = dep[1] = NULL;
1824
1825 /*
1826 * We first look for addresses in the same scope.
1827 * If there is one, return it.
1828 * If two or more, return one which matches the dst longest.
1829 * If none, return one of global addresses assigned other ifs.
1830 */
1831 IF_ADDR_RLOCK(ifp);
1832 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1833 if (ifa->ifa_addr->sa_family != AF_INET6)
1834 continue;
1835 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1836 continue; /* XXX: is there any case to allow anycast? */
1837 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1838 continue; /* don't use this interface */
1839 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1840 continue;
1841 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1842 if (V_ip6_use_deprecated)
1843 dep[0] = (struct in6_ifaddr *)ifa;
1844 continue;
1845 }
1846
1847 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1848 /*
1849 * call in6_matchlen() as few as possible
1850 */
1851 if (besta) {
1852 if (blen == -1)
1853 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1854 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1855 if (tlen > blen) {
1856 blen = tlen;
1857 besta = (struct in6_ifaddr *)ifa;
1858 }
1859 } else
1860 besta = (struct in6_ifaddr *)ifa;
1861 }
1862 }
1863 if (besta) {
1864 ifa_ref(&besta->ia_ifa);
1865 IF_ADDR_RUNLOCK(ifp);
1866 return (besta);
1867 }
1868
1869 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1870 if (ifa->ifa_addr->sa_family != AF_INET6)
1871 continue;
1872 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1873 continue; /* XXX: is there any case to allow anycast? */
1874 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1875 continue; /* don't use this interface */
1876 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1877 continue;
1878 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1879 if (V_ip6_use_deprecated)
1880 dep[1] = (struct in6_ifaddr *)ifa;
1881 continue;
1882 }
1883
1884 if (ifa != NULL)
1885 ifa_ref(ifa);
1886 IF_ADDR_RUNLOCK(ifp);
1887 return (struct in6_ifaddr *)ifa;
1888 }
1889
1890 /* use the last-resort values, that are, deprecated addresses */
1891 if (dep[0]) {
1892 ifa_ref((struct ifaddr *)dep[0]);
1893 IF_ADDR_RUNLOCK(ifp);
1894 return dep[0];
1895 }
1896 if (dep[1]) {
1897 ifa_ref((struct ifaddr *)dep[1]);
1898 IF_ADDR_RUNLOCK(ifp);
1899 return dep[1];
1900 }
1901
1902 IF_ADDR_RUNLOCK(ifp);
1903 return NULL;
1904 }
1905
1906 /*
1907 * perform DAD when interface becomes IFF_UP.
1908 */
1909 void
1910 in6_if_up(struct ifnet *ifp)
1911 {
1912 struct ifaddr *ifa;
1913 struct in6_ifaddr *ia;
1914
1915 IF_ADDR_RLOCK(ifp);
1916 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1917 if (ifa->ifa_addr->sa_family != AF_INET6)
1918 continue;
1919 ia = (struct in6_ifaddr *)ifa;
1920 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1921 /*
1922 * The TENTATIVE flag was likely set by hand
1923 * beforehand, implicitly indicating the need for DAD.
1924 * We may be able to skip the random delay in this
1925 * case, but we impose delays just in case.
1926 */
1927 nd6_dad_start(ifa,
1928 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1929 }
1930 }
1931 IF_ADDR_RUNLOCK(ifp);
1932
1933 /*
1934 * special cases, like 6to4, are handled in in6_ifattach
1935 */
1936 in6_ifattach(ifp, NULL);
1937 }
1938
1939 int
1940 in6if_do_dad(struct ifnet *ifp)
1941 {
1942 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1943 return (0);
1944
1945 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) ||
1946 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD))
1947 return (0);
1948
1949 /*
1950 * Our DAD routine requires the interface up and running.
1951 * However, some interfaces can be up before the RUNNING
1952 * status. Additionally, users may try to assign addresses
1953 * before the interface becomes up (or running).
1954 * This function returns EAGAIN in that case.
1955 * The caller should mark "tentative" on the address instead of
1956 * performing DAD immediately.
1957 */
1958 if (!((ifp->if_flags & IFF_UP) &&
1959 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
1960 return (EAGAIN);
1961
1962 return (1);
1963 }
1964
1965 /*
1966 * Calculate max IPv6 MTU through all the interfaces and store it
1967 * to in6_maxmtu.
1968 */
1969 void
1970 in6_setmaxmtu(void)
1971 {
1972 unsigned long maxmtu = 0;
1973 struct ifnet *ifp;
1974
1975 IFNET_RLOCK_NOSLEEP();
1976 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1977 /* this function can be called during ifnet initialization */
1978 if (!ifp->if_afdata[AF_INET6])
1979 continue;
1980 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
1981 IN6_LINKMTU(ifp) > maxmtu)
1982 maxmtu = IN6_LINKMTU(ifp);
1983 }
1984 IFNET_RUNLOCK_NOSLEEP();
1985 if (maxmtu) /* update only when maxmtu is positive */
1986 V_in6_maxmtu = maxmtu;
1987 }
1988
1989 /*
1990 * Provide the length of interface identifiers to be used for the link attached
1991 * to the given interface. The length should be defined in "IPv6 over
1992 * xxx-link" document. Note that address architecture might also define
1993 * the length for a particular set of address prefixes, regardless of the
1994 * link type. As clarified in rfc2462bis, those two definitions should be
1995 * consistent, and those really are as of August 2004.
1996 */
1997 int
1998 in6_if2idlen(struct ifnet *ifp)
1999 {
2000 switch (ifp->if_type) {
2001 case IFT_ETHER: /* RFC2464 */
2002 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2003 case IFT_L2VLAN: /* ditto */
2004 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */
2005 case IFT_INFINIBAND:
2006 return (64);
2007 case IFT_PPP: /* RFC2472 */
2008 return (64);
2009 case IFT_FRELAY: /* RFC2590 */
2010 return (64);
2011 case IFT_IEEE1394: /* RFC3146 */
2012 return (64);
2013 case IFT_GIF:
2014 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2015 case IFT_LOOP:
2016 return (64); /* XXX: is this really correct? */
2017 default:
2018 /*
2019 * Unknown link type:
2020 * It might be controversial to use the today's common constant
2021 * of 64 for these cases unconditionally. For full compliance,
2022 * we should return an error in this case. On the other hand,
2023 * if we simply miss the standard for the link type or a new
2024 * standard is defined for a new link type, the IFID length
2025 * is very likely to be the common constant. As a compromise,
2026 * we always use the constant, but make an explicit notice
2027 * indicating the "unknown" case.
2028 */
2029 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2030 return (64);
2031 }
2032 }
2033
2034 #include <sys/sysctl.h>
2035
2036 struct in6_llentry {
2037 struct llentry base;
2038 };
2039
2040 #define IN6_LLTBL_DEFAULT_HSIZE 32
2041 #define IN6_LLTBL_HASH(k, h) \
2042 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2043
2044 /*
2045 * Do actual deallocation of @lle.
2046 */
2047 static void
2048 in6_lltable_destroy_lle_unlocked(epoch_context_t ctx)
2049 {
2050 struct llentry *lle;
2051
2052 lle = __containerof(ctx, struct llentry, lle_epoch_ctx);
2053 LLE_LOCK_DESTROY(lle);
2054 LLE_REQ_DESTROY(lle);
2055 free(lle, M_LLTABLE);
2056 }
2057
2058 /*
2059 * Called by LLE_FREE_LOCKED when number of references
2060 * drops to zero.
2061 */
2062 static void
2063 in6_lltable_destroy_lle(struct llentry *lle)
2064 {
2065
2066 LLE_WUNLOCK(lle);
2067 epoch_call(net_epoch_preempt, &lle->lle_epoch_ctx, in6_lltable_destroy_lle_unlocked);
2068 }
2069
2070 static struct llentry *
2071 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2072 {
2073 struct in6_llentry *lle;
2074
2075 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2076 if (lle == NULL) /* NB: caller generates msg */
2077 return NULL;
2078
2079 lle->base.r_l3addr.addr6 = *addr6;
2080 lle->base.lle_refcnt = 1;
2081 lle->base.lle_free = in6_lltable_destroy_lle;
2082 LLE_LOCK_INIT(&lle->base);
2083 LLE_REQ_INIT(&lle->base);
2084 callout_init(&lle->base.lle_timer, 1);
2085
2086 return (&lle->base);
2087 }
2088
2089 static int
2090 in6_lltable_match_prefix(const struct sockaddr *saddr,
2091 const struct sockaddr *smask, u_int flags, struct llentry *lle)
2092 {
2093 const struct in6_addr *addr, *mask, *lle_addr;
2094
2095 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr;
2096 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr;
2097 lle_addr = &lle->r_l3addr.addr6;
2098
2099 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0)
2100 return (0);
2101
2102 if (lle->la_flags & LLE_IFADDR) {
2103
2104 /*
2105 * Delete LLE_IFADDR records IFF address & flag matches.
2106 * Note that addr is the interface address within prefix
2107 * being matched.
2108 */
2109 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) &&
2110 (flags & LLE_STATIC) != 0)
2111 return (1);
2112 return (0);
2113 }
2114
2115 /* flags & LLE_STATIC means deleting both dynamic and static entries */
2116 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))
2117 return (1);
2118
2119 return (0);
2120 }
2121
2122 static void
2123 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2124 {
2125 struct ifnet *ifp;
2126
2127 LLE_WLOCK_ASSERT(lle);
2128 KASSERT(llt != NULL, ("lltable is NULL"));
2129
2130 /* Unlink entry from table */
2131 if ((lle->la_flags & LLE_LINKED) != 0) {
2132
2133 ifp = llt->llt_ifp;
2134 IF_AFDATA_WLOCK_ASSERT(ifp);
2135 lltable_unlink_entry(llt, lle);
2136 }
2137
2138 llentry_free(lle);
2139 }
2140
2141 static int
2142 in6_lltable_rtcheck(struct ifnet *ifp,
2143 u_int flags,
2144 const struct sockaddr *l3addr)
2145 {
2146 const struct sockaddr_in6 *sin6;
2147 struct nhop6_basic nh6;
2148 struct in6_addr dst;
2149 uint32_t scopeid;
2150 int error;
2151 char ip6buf[INET6_ADDRSTRLEN];
2152 int fibnum;
2153
2154 KASSERT(l3addr->sa_family == AF_INET6,
2155 ("sin_family %d", l3addr->sa_family));
2156
2157 sin6 = (const struct sockaddr_in6 *)l3addr;
2158 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid);
2159 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib;
2160 error = fib6_lookup_nh_basic(fibnum, &dst, scopeid, 0, 0, &nh6);
2161 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) {
2162 struct ifaddr *ifa;
2163 /*
2164 * Create an ND6 cache for an IPv6 neighbor
2165 * that is not covered by our own prefix.
2166 */
2167 NET_EPOCH_ENTER();
2168 ifa = ifaof_ifpforaddr(l3addr, ifp);
2169 if (ifa != NULL) {
2170 NET_EPOCH_EXIT();
2171 return 0;
2172 }
2173 NET_EPOCH_EXIT();
2174 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2175 ip6_sprintf(ip6buf, &sin6->sin6_addr));
2176 return EINVAL;
2177 }
2178 return 0;
2179 }
2180
2181 /*
2182 * Called by the datapath to indicate that the entry was used.
2183 */
2184 static void
2185 in6_lltable_mark_used(struct llentry *lle)
2186 {
2187
2188 LLE_REQ_LOCK(lle);
2189 lle->r_skip_req = 0;
2190
2191 /*
2192 * Set the hit time so the callback function
2193 * can determine the remaining time before
2194 * transiting to the DELAY state.
2195 */
2196 lle->lle_hittime = time_uptime;
2197 LLE_REQ_UNLOCK(lle);
2198 }
2199
2200 static inline uint32_t
2201 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2202 {
2203
2204 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2205 }
2206
2207 static uint32_t
2208 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2209 {
2210
2211 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2212 }
2213
2214 static void
2215 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2216 {
2217 struct sockaddr_in6 *sin6;
2218
2219 sin6 = (struct sockaddr_in6 *)sa;
2220 bzero(sin6, sizeof(*sin6));
2221 sin6->sin6_family = AF_INET6;
2222 sin6->sin6_len = sizeof(*sin6);
2223 sin6->sin6_addr = lle->r_l3addr.addr6;
2224 }
2225
2226 static inline struct llentry *
2227 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2228 {
2229 struct llentry *lle;
2230 struct llentries *lleh;
2231 u_int hashidx;
2232
2233 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2234 lleh = &llt->lle_head[hashidx];
2235 CK_LIST_FOREACH(lle, lleh, lle_next) {
2236 if (lle->la_flags & LLE_DELETED)
2237 continue;
2238 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2239 break;
2240 }
2241
2242 return (lle);
2243 }
2244
2245 static void
2246 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle)
2247 {
2248
2249 lle->la_flags |= LLE_DELETED;
2250 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2251 #ifdef DIAGNOSTIC
2252 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2253 #endif
2254 llentry_free(lle);
2255 }
2256
2257 static struct llentry *
2258 in6_lltable_alloc(struct lltable *llt, u_int flags,
2259 const struct sockaddr *l3addr)
2260 {
2261 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2262 struct ifnet *ifp = llt->llt_ifp;
2263 struct llentry *lle;
2264 char linkhdr[LLE_MAX_LINKHDR];
2265 size_t linkhdrsize;
2266 int lladdr_off;
2267
2268 KASSERT(l3addr->sa_family == AF_INET6,
2269 ("sin_family %d", l3addr->sa_family));
2270
2271 /*
2272 * A route that covers the given address must have
2273 * been installed 1st because we are doing a resolution,
2274 * verify this.
2275 */
2276 if (!(flags & LLE_IFADDR) &&
2277 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2278 return (NULL);
2279
2280 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2281 if (lle == NULL) {
2282 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2283 return (NULL);
2284 }
2285 lle->la_flags = flags;
2286 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2287 linkhdrsize = LLE_MAX_LINKHDR;
2288 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp),
2289 linkhdr, &linkhdrsize, &lladdr_off) != 0) {
2290 epoch_call(net_epoch_preempt, &lle->lle_epoch_ctx, in6_lltable_destroy_lle_unlocked);
2291 return (NULL);
2292 }
2293 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize,
2294 lladdr_off);
2295 lle->la_flags |= LLE_STATIC;
2296 }
2297
2298 if ((lle->la_flags & LLE_STATIC) != 0)
2299 lle->ln_state = ND6_LLINFO_REACHABLE;
2300
2301 return (lle);
2302 }
2303
2304 static struct llentry *
2305 in6_lltable_lookup(struct lltable *llt, u_int flags,
2306 const struct sockaddr *l3addr)
2307 {
2308 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2309 struct llentry *lle;
2310
2311 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2312 KASSERT(l3addr->sa_family == AF_INET6,
2313 ("sin_family %d", l3addr->sa_family));
2314 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) !=
2315 (LLE_UNLOCKED | LLE_EXCLUSIVE),
2316 ("wrong lle request flags: %#x", flags));
2317
2318 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2319 if (lle == NULL)
2320 return (NULL);
2321 if (flags & LLE_UNLOCKED)
2322 return (lle);
2323
2324 if (flags & LLE_EXCLUSIVE)
2325 LLE_WLOCK(lle);
2326 else
2327 LLE_RLOCK(lle);
2328
2329 /*
2330 * If the afdata lock is not held, the LLE may have been unlinked while
2331 * we were blocked on the LLE lock. Check for this case.
2332 */
2333 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) {
2334 if (flags & LLE_EXCLUSIVE)
2335 LLE_WUNLOCK(lle);
2336 else
2337 LLE_RUNLOCK(lle);
2338 return (NULL);
2339 }
2340 return (lle);
2341 }
2342
2343 static int
2344 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2345 struct sysctl_req *wr)
2346 {
2347 struct ifnet *ifp = llt->llt_ifp;
2348 /* XXX stack use */
2349 struct {
2350 struct rt_msghdr rtm;
2351 struct sockaddr_in6 sin6;
2352 /*
2353 * ndp.c assumes that sdl is word aligned
2354 */
2355 #ifdef __LP64__
2356 uint32_t pad;
2357 #endif
2358 struct sockaddr_dl sdl;
2359 } ndpc;
2360 struct sockaddr_dl *sdl;
2361 int error;
2362
2363 bzero(&ndpc, sizeof(ndpc));
2364 /* skip deleted entries */
2365 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2366 return (0);
2367 /* Skip if jailed and not a valid IP of the prison. */
2368 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6);
2369 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0)
2370 return (0);
2371 /*
2372 * produce a msg made of:
2373 * struct rt_msghdr;
2374 * struct sockaddr_in6 (IPv6)
2375 * struct sockaddr_dl;
2376 */
2377 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2378 ndpc.rtm.rtm_version = RTM_VERSION;
2379 ndpc.rtm.rtm_type = RTM_GET;
2380 ndpc.rtm.rtm_flags = RTF_UP;
2381 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2382 if (V_deembed_scopeid)
2383 sa6_recoverscope(&ndpc.sin6);
2384
2385 /* publish */
2386 if (lle->la_flags & LLE_PUB)
2387 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2388
2389 sdl = &ndpc.sdl;
2390 sdl->sdl_family = AF_LINK;
2391 sdl->sdl_len = sizeof(*sdl);
2392 sdl->sdl_index = ifp->if_index;
2393 sdl->sdl_type = ifp->if_type;
2394 if ((lle->la_flags & LLE_VALID) == LLE_VALID) {
2395 sdl->sdl_alen = ifp->if_addrlen;
2396 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2397 } else {
2398 sdl->sdl_alen = 0;
2399 bzero(LLADDR(sdl), ifp->if_addrlen);
2400 }
2401 if (lle->la_expire != 0)
2402 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire +
2403 lle->lle_remtime / hz + time_second - time_uptime;
2404 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2405 if (lle->la_flags & LLE_STATIC)
2406 ndpc.rtm.rtm_flags |= RTF_STATIC;
2407 if (lle->la_flags & LLE_IFADDR)
2408 ndpc.rtm.rtm_flags |= RTF_PINNED;
2409 if (lle->ln_router != 0)
2410 ndpc.rtm.rtm_flags |= RTF_GATEWAY;
2411 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked;
2412 /* Store state in rmx_weight value */
2413 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state;
2414 ndpc.rtm.rtm_index = ifp->if_index;
2415 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2416
2417 return (error);
2418 }
2419
2420 static struct lltable *
2421 in6_lltattach(struct ifnet *ifp)
2422 {
2423 struct lltable *llt;
2424
2425 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2426 llt->llt_af = AF_INET6;
2427 llt->llt_ifp = ifp;
2428
2429 llt->llt_lookup = in6_lltable_lookup;
2430 llt->llt_alloc_entry = in6_lltable_alloc;
2431 llt->llt_delete_entry = in6_lltable_delete_entry;
2432 llt->llt_dump_entry = in6_lltable_dump_entry;
2433 llt->llt_hash = in6_lltable_hash;
2434 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2435 llt->llt_free_entry = in6_lltable_free_entry;
2436 llt->llt_match_prefix = in6_lltable_match_prefix;
2437 llt->llt_mark_used = in6_lltable_mark_used;
2438 lltable_link(llt);
2439
2440 return (llt);
2441 }
2442
2443 void *
2444 in6_domifattach(struct ifnet *ifp)
2445 {
2446 struct in6_ifextra *ext;
2447
2448 /* There are not IPv6-capable interfaces. */
2449 switch (ifp->if_type) {
2450 case IFT_PFLOG:
2451 case IFT_PFSYNC:
2452 case IFT_USB:
2453 return (NULL);
2454 }
2455 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2456 bzero(ext, sizeof(*ext));
2457
2458 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2459 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2460 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2461 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2462
2463 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2464 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2465 M_WAITOK);
2466 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2467 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2468
2469 ext->nd_ifinfo = nd6_ifattach(ifp);
2470 ext->scope6_id = scope6_ifattach(ifp);
2471 ext->lltable = in6_lltattach(ifp);
2472
2473 ext->mld_ifinfo = mld_domifattach(ifp);
2474
2475 return ext;
2476 }
2477
2478 int
2479 in6_domifmtu(struct ifnet *ifp)
2480 {
2481 if (ifp->if_afdata[AF_INET6] == NULL)
2482 return ifp->if_mtu;
2483
2484 return (IN6_LINKMTU(ifp));
2485 }
2486
2487 void
2488 in6_domifdetach(struct ifnet *ifp, void *aux)
2489 {
2490 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2491
2492 mld_domifdetach(ifp);
2493 scope6_ifdetach(ext->scope6_id);
2494 nd6_ifdetach(ifp, ext->nd_ifinfo);
2495 lltable_free(ext->lltable);
2496 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2497 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2498 free(ext->in6_ifstat, M_IFADDR);
2499 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2500 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2501 free(ext->icmp6_ifstat, M_IFADDR);
2502 free(ext, M_IFADDR);
2503 }
2504
2505 /*
2506 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2507 * v4 mapped addr or v4 compat addr
2508 */
2509 void
2510 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2511 {
2512
2513 bzero(sin, sizeof(*sin));
2514 sin->sin_len = sizeof(struct sockaddr_in);
2515 sin->sin_family = AF_INET;
2516 sin->sin_port = sin6->sin6_port;
2517 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2518 }
2519
2520 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2521 void
2522 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2523 {
2524 bzero(sin6, sizeof(*sin6));
2525 sin6->sin6_len = sizeof(struct sockaddr_in6);
2526 sin6->sin6_family = AF_INET6;
2527 sin6->sin6_port = sin->sin_port;
2528 sin6->sin6_addr.s6_addr32[0] = 0;
2529 sin6->sin6_addr.s6_addr32[1] = 0;
2530 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2531 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2532 }
2533
2534 /* Convert sockaddr_in6 into sockaddr_in. */
2535 void
2536 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2537 {
2538 struct sockaddr_in *sin_p;
2539 struct sockaddr_in6 sin6;
2540
2541 /*
2542 * Save original sockaddr_in6 addr and convert it
2543 * to sockaddr_in.
2544 */
2545 sin6 = *(struct sockaddr_in6 *)nam;
2546 sin_p = (struct sockaddr_in *)nam;
2547 in6_sin6_2_sin(sin_p, &sin6);
2548 }
2549
2550 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2551 void
2552 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2553 {
2554 struct sockaddr_in *sin_p;
2555 struct sockaddr_in6 *sin6_p;
2556
2557 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2558 sin_p = (struct sockaddr_in *)*nam;
2559 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2560 free(*nam, M_SONAME);
2561 *nam = (struct sockaddr *)sin6_p;
2562 }
Cache object: 01ddeac257ccc613fb95655956ad255d
|