65
66#include "opt_compat.h"
67#include "opt_inet.h"
68#include "opt_inet6.h"
69
70#include <sys/param.h>
71#include <sys/errno.h>
72#include <sys/jail.h>
73#include <sys/malloc.h>
74#include <sys/socket.h>
75#include <sys/socketvar.h>
76#include <sys/sockio.h>
77#include <sys/systm.h>
78#include <sys/priv.h>
79#include <sys/proc.h>
80#include <sys/time.h>
81#include <sys/kernel.h>
82#include <sys/syslog.h>
83
84#include <net/if.h>
85#include <net/if_var.h>
86#include <net/if_types.h>
87#include <net/route.h>
88#include <net/if_dl.h>
89#include <net/vnet.h>
90
91#include <netinet/in.h>
92#include <netinet/in_var.h>
93#include <net/if_llatbl.h>
94#include <netinet/if_ether.h>
95#include <netinet/in_systm.h>
96#include <netinet/ip.h>
97#include <netinet/in_pcb.h>
98#include <netinet/ip_carp.h>
99
100#include <netinet/ip6.h>
101#include <netinet6/ip6_var.h>
102#include <netinet6/nd6.h>
103#include <netinet6/mld6_var.h>
104#include <netinet6/ip6_mroute.h>
105#include <netinet6/in6_ifattach.h>
106#include <netinet6/scope6_var.h>
107#include <netinet6/in6_pcb.h>
108
109VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
110#define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
111
112/*
113 * Definitions of some costant IP6 addresses.
114 */
115const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
116const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
117const struct in6_addr in6addr_nodelocal_allnodes =
118 IN6ADDR_NODELOCAL_ALLNODES_INIT;
119const struct in6_addr in6addr_linklocal_allnodes =
120 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
121const struct in6_addr in6addr_linklocal_allrouters =
122 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
123const struct in6_addr in6addr_linklocal_allv2routers =
124 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
125
126const struct in6_addr in6mask0 = IN6MASK0;
127const struct in6_addr in6mask32 = IN6MASK32;
128const struct in6_addr in6mask64 = IN6MASK64;
129const struct in6_addr in6mask96 = IN6MASK96;
130const struct in6_addr in6mask128 = IN6MASK128;
131
132const struct sockaddr_in6 sa6_any =
133 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
134
135static int in6_lifaddr_ioctl(struct socket *, u_long, caddr_t,
136 struct ifnet *, struct thread *);
137static int in6_ifinit(struct ifnet *, struct in6_ifaddr *,
138 struct sockaddr_in6 *, int);
139static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
140
141int (*faithprefix_p)(struct in6_addr *);
142
143#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
144#define ia62ifa(ia6) (&((ia6)->ia_ifa))
145
146void
147in6_ifaddloop(struct ifaddr *ifa)
148{
149 struct sockaddr_dl gateway;
150 struct sockaddr_in6 mask, addr;
151 struct rtentry rt;
152 struct in6_ifaddr *ia;
153 struct ifnet *ifp;
154 struct llentry *ln;
155
156 ia = ifa2ia6(ifa);
157 ifp = ifa->ifa_ifp;
158 IF_AFDATA_LOCK(ifp);
159 ifa->ifa_rtrequest = nd6_rtrequest;
160 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR |
161 LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr);
162 IF_AFDATA_UNLOCK(ifp);
163 if (ln != NULL) {
164 ln->la_expire = 0; /* for IPv6 this means permanent */
165 ln->ln_state = ND6_LLINFO_REACHABLE;
166 /*
167 * initialize for rtmsg generation
168 */
169 bzero(&gateway, sizeof(gateway));
170 gateway.sdl_len = sizeof(gateway);
171 gateway.sdl_family = AF_LINK;
172 gateway.sdl_nlen = 0;
173 gateway.sdl_alen = 6;
174 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned,
175 sizeof(ln->ll_addr));
176 LLE_WUNLOCK(ln);
177 }
178
179 bzero(&rt, sizeof(rt));
180 rt.rt_gateway = (struct sockaddr *)&gateway;
181 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
182 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
183 rt_mask(&rt) = (struct sockaddr *)&mask;
184 rt_key(&rt) = (struct sockaddr *)&addr;
185 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC;
186 /* Announce arrival of local address to all FIBs. */
187 rt_newaddrmsg(RTM_ADD, ifa, 0, &rt);
188}
189
190void
191in6_ifremloop(struct ifaddr *ifa)
192{
193 struct sockaddr_dl gateway;
194 struct sockaddr_in6 mask, addr;
195 struct rtentry rt0;
196 struct in6_ifaddr *ia;
197 struct ifnet *ifp;
198
199 ia = ifa2ia6(ifa);
200 ifp = ifa->ifa_ifp;
201 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
202 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
203 lltable_prefix_free(AF_INET6, (struct sockaddr *)&addr,
204 (struct sockaddr *)&mask, LLE_STATIC);
205
206 /*
207 * initialize for rtmsg generation
208 */
209 bzero(&gateway, sizeof(gateway));
210 gateway.sdl_len = sizeof(gateway);
211 gateway.sdl_family = AF_LINK;
212 gateway.sdl_nlen = 0;
213 gateway.sdl_alen = ifp->if_addrlen;
214 bzero(&rt0, sizeof(rt0));
215 rt0.rt_gateway = (struct sockaddr *)&gateway;
216 rt_mask(&rt0) = (struct sockaddr *)&mask;
217 rt_key(&rt0) = (struct sockaddr *)&addr;
218 rt0.rt_flags = RTF_HOST | RTF_STATIC;
219 /* Announce removal of local address to all FIBs. */
220 rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0);
221}
222
223int
224in6_mask2len(struct in6_addr *mask, u_char *lim0)
225{
226 int x = 0, y;
227 u_char *lim = lim0, *p;
228
229 /* ignore the scope_id part */
230 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
231 lim = (u_char *)mask + sizeof(*mask);
232 for (p = (u_char *)mask; p < lim; x++, p++) {
233 if (*p != 0xff)
234 break;
235 }
236 y = 0;
237 if (p < lim) {
238 for (y = 0; y < 8; y++) {
239 if ((*p & (0x80 >> y)) == 0)
240 break;
241 }
242 }
243
244 /*
245 * when the limit pointer is given, do a stricter check on the
246 * remaining bits.
247 */
248 if (p < lim) {
249 if (y != 0 && (*p & (0x00ff >> y)) != 0)
250 return (-1);
251 for (p = p + 1; p < lim; p++)
252 if (*p != 0)
253 return (-1);
254 }
255
256 return x * 8 + y;
257}
258
259#ifdef COMPAT_FREEBSD32
260struct in6_ndifreq32 {
261 char ifname[IFNAMSIZ];
262 uint32_t ifindex;
263};
264#define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
265#endif
266
267int
268in6_control(struct socket *so, u_long cmd, caddr_t data,
269 struct ifnet *ifp, struct thread *td)
270{
271 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
272 struct in6_ifaddr *ia = NULL;
273 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
274 struct sockaddr_in6 *sa6;
275 int carp_attached = 0;
276 int error;
277 u_long ocmd = cmd;
278
279 /*
280 * Compat to make pre-10.x ifconfig(8) operable.
281 */
282 if (cmd == OSIOCAIFADDR_IN6)
283 cmd = SIOCAIFADDR_IN6;
284
285 switch (cmd) {
286 case SIOCGETSGCNT_IN6:
287 case SIOCGETMIFCNT_IN6:
288 /*
289 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
290 * We cannot see how that would be needed, so do not adjust the
291 * KPI blindly; more likely should clean up the IPv4 variant.
292 */
293 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
294 }
295
296 switch(cmd) {
297 case SIOCAADDRCTL_POLICY:
298 case SIOCDADDRCTL_POLICY:
299 if (td != NULL) {
300 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
301 if (error)
302 return (error);
303 }
304 return (in6_src_ioctl(cmd, data));
305 }
306
307 if (ifp == NULL)
308 return (EOPNOTSUPP);
309
310 switch (cmd) {
311 case SIOCSNDFLUSH_IN6:
312 case SIOCSPFXFLUSH_IN6:
313 case SIOCSRTRFLUSH_IN6:
314 case SIOCSDEFIFACE_IN6:
315 case SIOCSIFINFO_FLAGS:
316 case SIOCSIFINFO_IN6:
317 if (td != NULL) {
318 error = priv_check(td, PRIV_NETINET_ND6);
319 if (error)
320 return (error);
321 }
322 /* FALLTHROUGH */
323 case OSIOCGIFINFO_IN6:
324 case SIOCGIFINFO_IN6:
325 case SIOCGDRLST_IN6:
326 case SIOCGPRLST_IN6:
327 case SIOCGNBRINFO_IN6:
328 case SIOCGDEFIFACE_IN6:
329 return (nd6_ioctl(cmd, data, ifp));
330
331#ifdef COMPAT_FREEBSD32
332 case SIOCGDEFIFACE32_IN6:
333 {
334 struct in6_ndifreq ndif;
335 struct in6_ndifreq32 *ndif32;
336
337 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
338 ifp);
339 if (error)
340 return (error);
341 ndif32 = (struct in6_ndifreq32 *)data;
342 ndif32->ifindex = ndif.ifindex;
343 return (0);
344 }
345#endif
346 }
347
348 switch (cmd) {
349 case SIOCSIFPREFIX_IN6:
350 case SIOCDIFPREFIX_IN6:
351 case SIOCAIFPREFIX_IN6:
352 case SIOCCIFPREFIX_IN6:
353 case SIOCSGIFPREFIX_IN6:
354 case SIOCGIFPREFIX_IN6:
355 log(LOG_NOTICE,
356 "prefix ioctls are now invalidated. "
357 "please use ifconfig.\n");
358 return (EOPNOTSUPP);
359 }
360
361 switch (cmd) {
362 case SIOCSSCOPE6:
363 if (td != NULL) {
364 error = priv_check(td, PRIV_NETINET_SCOPE6);
365 if (error)
366 return (error);
367 }
368 return (scope6_set(ifp,
369 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
370 case SIOCGSCOPE6:
371 return (scope6_get(ifp,
372 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
373 case SIOCGSCOPE6DEF:
374 return (scope6_get_default((struct scope6_id *)
375 ifr->ifr_ifru.ifru_scope_id));
376 }
377
378 switch (cmd) {
379 case SIOCALIFADDR:
380 if (td != NULL) {
381 error = priv_check(td, PRIV_NET_ADDIFADDR);
382 if (error)
383 return (error);
384 }
385 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
386
387 case SIOCDLIFADDR:
388 if (td != NULL) {
389 error = priv_check(td, PRIV_NET_DELIFADDR);
390 if (error)
391 return (error);
392 }
393 /* FALLTHROUGH */
394 case SIOCGLIFADDR:
395 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
396 }
397
398 /*
399 * Find address for this interface, if it exists.
400 *
401 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
402 * only, and used the first interface address as the target of other
403 * operations (without checking ifra_addr). This was because netinet
404 * code/API assumed at most 1 interface address per interface.
405 * Since IPv6 allows a node to assign multiple addresses
406 * on a single interface, we almost always look and check the
407 * presence of ifra_addr, and reject invalid ones here.
408 * It also decreases duplicated code among SIOC*_IN6 operations.
409 */
410 switch (cmd) {
411 case SIOCAIFADDR_IN6:
412 case SIOCSIFPHYADDR_IN6:
413 sa6 = &ifra->ifra_addr;
414 break;
415 case SIOCSIFADDR_IN6:
416 case SIOCGIFADDR_IN6:
417 case SIOCSIFDSTADDR_IN6:
418 case SIOCSIFNETMASK_IN6:
419 case SIOCGIFDSTADDR_IN6:
420 case SIOCGIFNETMASK_IN6:
421 case SIOCDIFADDR_IN6:
422 case SIOCGIFPSRCADDR_IN6:
423 case SIOCGIFPDSTADDR_IN6:
424 case SIOCGIFAFLAG_IN6:
425 case SIOCSNDFLUSH_IN6:
426 case SIOCSPFXFLUSH_IN6:
427 case SIOCSRTRFLUSH_IN6:
428 case SIOCGIFALIFETIME_IN6:
429 case SIOCSIFALIFETIME_IN6:
430 case SIOCGIFSTAT_IN6:
431 case SIOCGIFSTAT_ICMP6:
432 sa6 = &ifr->ifr_addr;
433 break;
434 default:
435 sa6 = NULL;
436 break;
437 }
438 if (sa6 && sa6->sin6_family == AF_INET6) {
439 if (sa6->sin6_scope_id != 0)
440 error = sa6_embedscope(sa6, 0);
441 else
442 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
443 if (error != 0)
444 return (error);
445 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
446 &sa6->sin6_addr)) != 0)
447 return (error);
448 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
449 } else
450 ia = NULL;
451
452 switch (cmd) {
453 case SIOCSIFADDR_IN6:
454 case SIOCSIFDSTADDR_IN6:
455 case SIOCSIFNETMASK_IN6:
456 /*
457 * Since IPv6 allows a node to assign multiple addresses
458 * on a single interface, SIOCSIFxxx ioctls are deprecated.
459 */
460 /* we decided to obsolete this command (20000704) */
461 error = EINVAL;
462 goto out;
463
464 case SIOCDIFADDR_IN6:
465 /*
466 * for IPv4, we look for existing in_ifaddr here to allow
467 * "ifconfig if0 delete" to remove the first IPv4 address on
468 * the interface. For IPv6, as the spec allows multiple
469 * interface address from the day one, we consider "remove the
470 * first one" semantics to be not preferable.
471 */
472 if (ia == NULL) {
473 error = EADDRNOTAVAIL;
474 goto out;
475 }
476 /* FALLTHROUGH */
477 case SIOCAIFADDR_IN6:
478 /*
479 * We always require users to specify a valid IPv6 address for
480 * the corresponding operation.
481 */
482 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
483 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
484 error = EAFNOSUPPORT;
485 goto out;
486 }
487
488 if (td != NULL) {
489 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
490 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
491 if (error)
492 goto out;
493 }
494 break;
495
496 case SIOCGIFADDR_IN6:
497 /* This interface is basically deprecated. use SIOCGIFCONF. */
498 /* FALLTHROUGH */
499 case SIOCGIFAFLAG_IN6:
500 case SIOCGIFNETMASK_IN6:
501 case SIOCGIFDSTADDR_IN6:
502 case SIOCGIFALIFETIME_IN6:
503 /* must think again about its semantics */
504 if (ia == NULL) {
505 error = EADDRNOTAVAIL;
506 goto out;
507 }
508 break;
509
510 case SIOCSIFALIFETIME_IN6:
511 {
512 struct in6_addrlifetime *lt;
513
514 if (td != NULL) {
515 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
516 if (error)
517 goto out;
518 }
519 if (ia == NULL) {
520 error = EADDRNOTAVAIL;
521 goto out;
522 }
523 /* sanity for overflow - beware unsigned */
524 lt = &ifr->ifr_ifru.ifru_lifetime;
525 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
526 lt->ia6t_vltime + time_second < time_second) {
527 error = EINVAL;
528 goto out;
529 }
530 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
531 lt->ia6t_pltime + time_second < time_second) {
532 error = EINVAL;
533 goto out;
534 }
535 break;
536 }
537 }
538
539 switch (cmd) {
540 case SIOCGIFADDR_IN6:
541 ifr->ifr_addr = ia->ia_addr;
542 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
543 goto out;
544 break;
545
546 case SIOCGIFDSTADDR_IN6:
547 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
548 error = EINVAL;
549 goto out;
550 }
551 /*
552 * XXX: should we check if ifa_dstaddr is NULL and return
553 * an error?
554 */
555 ifr->ifr_dstaddr = ia->ia_dstaddr;
556 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
557 goto out;
558 break;
559
560 case SIOCGIFNETMASK_IN6:
561 ifr->ifr_addr = ia->ia_prefixmask;
562 break;
563
564 case SIOCGIFAFLAG_IN6:
565 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
566 break;
567
568 case SIOCGIFSTAT_IN6:
569 if (ifp == NULL) {
570 error = EINVAL;
571 goto out;
572 }
573 bzero(&ifr->ifr_ifru.ifru_stat,
574 sizeof(ifr->ifr_ifru.ifru_stat));
575 ifr->ifr_ifru.ifru_stat =
576 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat;
577 break;
578
579 case SIOCGIFSTAT_ICMP6:
580 if (ifp == NULL) {
581 error = EINVAL;
582 goto out;
583 }
584 bzero(&ifr->ifr_ifru.ifru_icmp6stat,
585 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
586 ifr->ifr_ifru.ifru_icmp6stat =
587 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat;
588 break;
589
590 case SIOCGIFALIFETIME_IN6:
591 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
592 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
593 time_t maxexpire;
594 struct in6_addrlifetime *retlt =
595 &ifr->ifr_ifru.ifru_lifetime;
596
597 /*
598 * XXX: adjust expiration time assuming time_t is
599 * signed.
600 */
601 maxexpire = (-1) &
602 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
603 if (ia->ia6_lifetime.ia6t_vltime <
604 maxexpire - ia->ia6_updatetime) {
605 retlt->ia6t_expire = ia->ia6_updatetime +
606 ia->ia6_lifetime.ia6t_vltime;
607 } else
608 retlt->ia6t_expire = maxexpire;
609 }
610 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
611 time_t maxexpire;
612 struct in6_addrlifetime *retlt =
613 &ifr->ifr_ifru.ifru_lifetime;
614
615 /*
616 * XXX: adjust expiration time assuming time_t is
617 * signed.
618 */
619 maxexpire = (-1) &
620 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
621 if (ia->ia6_lifetime.ia6t_pltime <
622 maxexpire - ia->ia6_updatetime) {
623 retlt->ia6t_preferred = ia->ia6_updatetime +
624 ia->ia6_lifetime.ia6t_pltime;
625 } else
626 retlt->ia6t_preferred = maxexpire;
627 }
628 break;
629
630 case SIOCSIFALIFETIME_IN6:
631 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
632 /* for sanity */
633 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
634 ia->ia6_lifetime.ia6t_expire =
635 time_second + ia->ia6_lifetime.ia6t_vltime;
636 } else
637 ia->ia6_lifetime.ia6t_expire = 0;
638 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
639 ia->ia6_lifetime.ia6t_preferred =
640 time_second + ia->ia6_lifetime.ia6t_pltime;
641 } else
642 ia->ia6_lifetime.ia6t_preferred = 0;
643 break;
644
645 case SIOCAIFADDR_IN6:
646 {
647 int i;
648 struct nd_prefixctl pr0;
649 struct nd_prefix *pr;
650
651 /*
652 * first, make or update the interface address structure,
653 * and link it to the list.
654 */
655 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
656 goto out;
657 if (ia != NULL)
658 ifa_free(&ia->ia_ifa);
659 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
660 == NULL) {
661 /*
662 * this can happen when the user specify the 0 valid
663 * lifetime.
664 */
665 break;
666 }
667
668 if (cmd == ocmd && ifra->ifra_vhid > 0) {
669 if (carp_attach_p != NULL)
670 error = (*carp_attach_p)(&ia->ia_ifa,
671 ifra->ifra_vhid);
672 else
673 error = EPROTONOSUPPORT;
674 if (error)
675 goto out;
676 else
677 carp_attached = 1;
678 }
679
680 /*
681 * then, make the prefix on-link on the interface.
682 * XXX: we'd rather create the prefix before the address, but
683 * we need at least one address to install the corresponding
684 * interface route, so we configure the address first.
685 */
686
687 /*
688 * convert mask to prefix length (prefixmask has already
689 * been validated in in6_update_ifa().
690 */
691 bzero(&pr0, sizeof(pr0));
692 pr0.ndpr_ifp = ifp;
693 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
694 NULL);
695 if (pr0.ndpr_plen == 128) {
696 break; /* we don't need to install a host route. */
697 }
698 pr0.ndpr_prefix = ifra->ifra_addr;
699 /* apply the mask for safety. */
700 for (i = 0; i < 4; i++) {
701 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
702 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
703 }
704 /*
705 * XXX: since we don't have an API to set prefix (not address)
706 * lifetimes, we just use the same lifetimes as addresses.
707 * The (temporarily) installed lifetimes can be overridden by
708 * later advertised RAs (when accept_rtadv is non 0), which is
709 * an intended behavior.
710 */
711 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
712 pr0.ndpr_raf_auto =
713 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
714 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
715 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
716
717 /* add the prefix if not yet. */
718 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
719 /*
720 * nd6_prelist_add will install the corresponding
721 * interface route.
722 */
723 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
724 if (carp_attached)
725 (*carp_detach_p)(&ia->ia_ifa);
726 goto out;
727 }
728 if (pr == NULL) {
729 if (carp_attached)
730 (*carp_detach_p)(&ia->ia_ifa);
731 log(LOG_ERR, "nd6_prelist_add succeeded but "
732 "no prefix\n");
733 error = EINVAL;
734 goto out;
735 }
736 }
737
738 /* relate the address to the prefix */
739 if (ia->ia6_ndpr == NULL) {
740 ia->ia6_ndpr = pr;
741 pr->ndpr_refcnt++;
742
743 /*
744 * If this is the first autoconf address from the
745 * prefix, create a temporary address as well
746 * (when required).
747 */
748 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
749 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
750 int e;
751 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
752 log(LOG_NOTICE, "in6_control: failed "
753 "to create a temporary address, "
754 "errno=%d\n", e);
755 }
756 }
757 }
758
759 /*
760 * this might affect the status of autoconfigured addresses,
761 * that is, this address might make other addresses detached.
762 */
763 pfxlist_onlink_check();
764 if (error == 0 && ia) {
765 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
766 /*
767 * Try to clear the flag when a new
768 * IPv6 address is added onto an
769 * IFDISABLED interface and it
770 * succeeds.
771 */
772 struct in6_ndireq nd;
773
774 memset(&nd, 0, sizeof(nd));
775 nd.ndi.flags = ND_IFINFO(ifp)->flags;
776 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
777 if (nd6_ioctl(SIOCSIFINFO_FLAGS,
778 (caddr_t)&nd, ifp) < 0)
779 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
780 "SIOCSIFINFO_FLAGS for -ifdisabled "
781 "failed.");
782 /*
783 * Ignore failure of clearing the flag
784 * intentionally. The failure means
785 * address duplication was detected.
786 */
787 }
788 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
789 }
790 break;
791 }
792
793 case SIOCDIFADDR_IN6:
794 {
795 struct nd_prefix *pr;
796
797 /*
798 * If the address being deleted is the only one that owns
799 * the corresponding prefix, expire the prefix as well.
800 * XXX: theoretically, we don't have to worry about such
801 * relationship, since we separate the address management
802 * and the prefix management. We do this, however, to provide
803 * as much backward compatibility as possible in terms of
804 * the ioctl operation.
805 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
806 */
807 pr = ia->ia6_ndpr;
808 in6_purgeaddr(&ia->ia_ifa);
809 if (pr && pr->ndpr_refcnt == 0)
810 prelist_remove(pr);
811 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
812 break;
813 }
814
815 default:
816 if (ifp == NULL || ifp->if_ioctl == 0) {
817 error = EOPNOTSUPP;
818 goto out;
819 }
820 error = (*ifp->if_ioctl)(ifp, cmd, data);
821 goto out;
822 }
823
824 error = 0;
825out:
826 if (ia != NULL)
827 ifa_free(&ia->ia_ifa);
828 return (error);
829}
830
831
832/*
833 * Join necessary multicast groups. Factored out from in6_update_ifa().
834 * This entire work should only be done once, for the default FIB.
835 */
836static int
837in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
838 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
839{
840 char ip6buf[INET6_ADDRSTRLEN];
841 struct sockaddr_in6 mltaddr, mltmask;
842 struct in6_addr llsol;
843 struct in6_multi_mship *imm;
844 struct rtentry *rt;
845 int delay, error;
846
847 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
848
849 /* Join solicited multicast addr for new host id. */
850 bzero(&llsol, sizeof(struct in6_addr));
851 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
852 llsol.s6_addr32[1] = 0;
853 llsol.s6_addr32[2] = htonl(1);
854 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
855 llsol.s6_addr8[12] = 0xff;
856 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) {
857 /* XXX: should not happen */
858 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
859 goto cleanup;
860 }
861 delay = 0;
862 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
863 /*
864 * We need a random delay for DAD on the address being
865 * configured. It also means delaying transmission of the
866 * corresponding MLD report to avoid report collision.
867 * [RFC 4861, Section 6.3.7]
868 */
869 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
870 }
871 imm = in6_joingroup(ifp, &llsol, &error, delay);
872 if (imm == NULL) {
873 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
874 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol),
875 if_name(ifp), error));
876 goto cleanup;
877 }
878 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
879 *in6m_sol = imm->i6mm_maddr;
880
881 bzero(&mltmask, sizeof(mltmask));
882 mltmask.sin6_len = sizeof(struct sockaddr_in6);
883 mltmask.sin6_family = AF_INET6;
884 mltmask.sin6_addr = in6mask32;
885#define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */
886
887 /*
888 * Join link-local all-nodes address.
889 */
890 bzero(&mltaddr, sizeof(mltaddr));
891 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
892 mltaddr.sin6_family = AF_INET6;
893 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
894 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
895 goto cleanup; /* XXX: should not fail */
896
897 /*
898 * XXX: do we really need this automatic routes? We should probably
899 * reconsider this stuff. Most applications actually do not need the
900 * routes, since they usually specify the outgoing interface.
901 */
902 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
903 if (rt != NULL) {
904 /* XXX: only works in !SCOPEDROUTING case. */
905 if (memcmp(&mltaddr.sin6_addr,
906 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
907 MLTMASK_LEN)) {
908 RTFREE_LOCKED(rt);
909 rt = NULL;
910 }
911 }
912 if (rt == NULL) {
913 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
914 (struct sockaddr *)&ia->ia_addr,
915 (struct sockaddr *)&mltmask, RTF_UP,
916 (struct rtentry **)0, RT_DEFAULT_FIB);
917 if (error)
918 goto cleanup;
919 } else
920 RTFREE_LOCKED(rt);
921
922 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
923 if (imm == NULL) {
924 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
925 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
926 &mltaddr.sin6_addr), if_name(ifp), error));
927 goto cleanup;
928 }
929 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
930
931 /*
932 * Join node information group address.
933 */
934 delay = 0;
935 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
936 /*
937 * The spec does not say anything about delay for this group,
938 * but the same logic should apply.
939 */
940 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
941 }
942 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
943 /* XXX jinmei */
944 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
945 if (imm == NULL)
946 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
947 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
948 &mltaddr.sin6_addr), if_name(ifp), error));
949 /* XXX not very fatal, go on... */
950 else
951 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
952 }
953 if (V_icmp6_nodeinfo_oldmcprefix &&
954 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
955 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
956 if (imm == NULL)
957 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
958 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
959 &mltaddr.sin6_addr), if_name(ifp), error));
960 /* XXX not very fatal, go on... */
961 else
962 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
963 }
964
965 /*
966 * Join interface-local all-nodes address.
967 * (ff01::1%ifN, and ff01::%ifN/32)
968 */
969 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
970 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
971 goto cleanup; /* XXX: should not fail */
972 /* XXX: again, do we really need the route? */
973 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
974 if (rt != NULL) {
975 if (memcmp(&mltaddr.sin6_addr,
976 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
977 MLTMASK_LEN)) {
978 RTFREE_LOCKED(rt);
979 rt = NULL;
980 }
981 }
982 if (rt == NULL) {
983 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
984 (struct sockaddr *)&ia->ia_addr,
985 (struct sockaddr *)&mltmask, RTF_UP,
986 (struct rtentry **)0, RT_DEFAULT_FIB);
987 if (error)
988 goto cleanup;
989 } else
990 RTFREE_LOCKED(rt);
991
992 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
993 if (imm == NULL) {
994 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
995 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
996 &mltaddr.sin6_addr), if_name(ifp), error));
997 goto cleanup;
998 }
999 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
1000#undef MLTMASK_LEN
1001
1002cleanup:
1003 return (error);
1004}
1005
1006/*
1007 * Update parameters of an IPv6 interface address.
1008 * If necessary, a new entry is created and linked into address chains.
1009 * This function is separated from in6_control().
1010 */
1011int
1012in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1013 struct in6_ifaddr *ia, int flags)
1014{
1015 int error = 0, hostIsNew = 0, plen = -1;
1016 struct sockaddr_in6 dst6;
1017 struct in6_addrlifetime *lt;
1018 struct in6_multi *in6m_sol;
1019 int delay;
1020 char ip6buf[INET6_ADDRSTRLEN];
1021
1022 /* Validate parameters */
1023 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
1024 return (EINVAL);
1025
1026 /*
1027 * The destination address for a p2p link must have a family
1028 * of AF_UNSPEC or AF_INET6.
1029 */
1030 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
1031 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
1032 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
1033 return (EAFNOSUPPORT);
1034 /*
1035 * validate ifra_prefixmask. don't check sin6_family, netmask
1036 * does not carry fields other than sin6_len.
1037 */
1038 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
1039 return (EINVAL);
1040 /*
1041 * Because the IPv6 address architecture is classless, we require
1042 * users to specify a (non 0) prefix length (mask) for a new address.
1043 * We also require the prefix (when specified) mask is valid, and thus
1044 * reject a non-consecutive mask.
1045 */
1046 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
1047 return (EINVAL);
1048 if (ifra->ifra_prefixmask.sin6_len != 0) {
1049 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
1050 (u_char *)&ifra->ifra_prefixmask +
1051 ifra->ifra_prefixmask.sin6_len);
1052 if (plen <= 0)
1053 return (EINVAL);
1054 } else {
1055 /*
1056 * In this case, ia must not be NULL. We just use its prefix
1057 * length.
1058 */
1059 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1060 }
1061 /*
1062 * If the destination address on a p2p interface is specified,
1063 * and the address is a scoped one, validate/set the scope
1064 * zone identifier.
1065 */
1066 dst6 = ifra->ifra_dstaddr;
1067 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1068 (dst6.sin6_family == AF_INET6)) {
1069 struct in6_addr in6_tmp;
1070 u_int32_t zoneid;
1071
1072 in6_tmp = dst6.sin6_addr;
1073 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1074 return (EINVAL); /* XXX: should be impossible */
1075
1076 if (dst6.sin6_scope_id != 0) {
1077 if (dst6.sin6_scope_id != zoneid)
1078 return (EINVAL);
1079 } else /* user omit to specify the ID. */
1080 dst6.sin6_scope_id = zoneid;
1081
1082 /* convert into the internal form */
1083 if (sa6_embedscope(&dst6, 0))
1084 return (EINVAL); /* XXX: should be impossible */
1085 }
1086 /*
1087 * The destination address can be specified only for a p2p or a
1088 * loopback interface. If specified, the corresponding prefix length
1089 * must be 128.
1090 */
1091 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1092 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1093 /* XXX: noisy message */
1094 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1095 "be specified for a p2p or a loopback IF only\n"));
1096 return (EINVAL);
1097 }
1098 if (plen != 128) {
1099 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1100 "be 128 when dstaddr is specified\n"));
1101 return (EINVAL);
1102 }
1103 }
1104 /* lifetime consistency check */
1105 lt = &ifra->ifra_lifetime;
1106 if (lt->ia6t_pltime > lt->ia6t_vltime)
1107 return (EINVAL);
1108 if (lt->ia6t_vltime == 0) {
1109 /*
1110 * the following log might be noisy, but this is a typical
1111 * configuration mistake or a tool's bug.
1112 */
1113 nd6log((LOG_INFO,
1114 "in6_update_ifa: valid lifetime is 0 for %s\n",
1115 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1116
1117 if (ia == NULL)
1118 return (0); /* there's nothing to do */
1119 }
1120
1121 /*
1122 * If this is a new address, allocate a new ifaddr and link it
1123 * into chains.
1124 */
1125 if (ia == NULL) {
1126 hostIsNew = 1;
1127 /*
1128 * When in6_update_ifa() is called in a process of a received
1129 * RA, it is called under an interrupt context. So, we should
1130 * call malloc with M_NOWAIT.
1131 */
1132 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR,
1133 M_NOWAIT);
1134 if (ia == NULL)
1135 return (ENOBUFS);
1136 bzero((caddr_t)ia, sizeof(*ia));
1137 ifa_init(&ia->ia_ifa);
1138 LIST_INIT(&ia->ia6_memberships);
1139 /* Initialize the address and masks, and put time stamp */
1140 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1141 ia->ia_addr.sin6_family = AF_INET6;
1142 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1143 ia->ia6_createtime = time_second;
1144 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1145 /*
1146 * XXX: some functions expect that ifa_dstaddr is not
1147 * NULL for p2p interfaces.
1148 */
1149 ia->ia_ifa.ifa_dstaddr =
1150 (struct sockaddr *)&ia->ia_dstaddr;
1151 } else {
1152 ia->ia_ifa.ifa_dstaddr = NULL;
1153 }
1154 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1155 ia->ia_ifp = ifp;
1156 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1157 IF_ADDR_WLOCK(ifp);
1158 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1159 IF_ADDR_WUNLOCK(ifp);
1160
1161 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1162 IN6_IFADDR_WLOCK();
1163 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1164 LIST_INSERT_HEAD(IN6ADDR_HASH(&ifra->ifra_addr.sin6_addr),
1165 ia, ia6_hash);
1166 IN6_IFADDR_WUNLOCK();
1167 }
1168
1169 /* update timestamp */
1170 ia->ia6_updatetime = time_second;
1171
1172 /* set prefix mask */
1173 if (ifra->ifra_prefixmask.sin6_len) {
1174 /*
1175 * We prohibit changing the prefix length of an existing
1176 * address, because
1177 * + such an operation should be rare in IPv6, and
1178 * + the operation would confuse prefix management.
1179 */
1180 if (ia->ia_prefixmask.sin6_len &&
1181 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1182 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an"
1183 " existing (%s) address should not be changed\n",
1184 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1185 error = EINVAL;
1186 goto unlink;
1187 }
1188 ia->ia_prefixmask = ifra->ifra_prefixmask;
1189 ia->ia_prefixmask.sin6_family = AF_INET6;
1190 }
1191
1192 /*
1193 * If a new destination address is specified, scrub the old one and
1194 * install the new destination. Note that the interface must be
1195 * p2p or loopback (see the check above.)
1196 */
1197 if (dst6.sin6_family == AF_INET6 &&
1198 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1199 int e;
1200
1201 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1202 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) {
1203 nd6log((LOG_ERR, "in6_update_ifa: failed to remove "
1204 "a route to the old destination: %s\n",
1205 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1206 /* proceed anyway... */
1207 } else
1208 ia->ia_flags &= ~IFA_ROUTE;
1209 ia->ia_dstaddr = dst6;
1210 }
1211
1212 /*
1213 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1214 * to see if the address is deprecated or invalidated, but initialize
1215 * these members for applications.
1216 */
1217 ia->ia6_lifetime = ifra->ifra_lifetime;
1218 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1219 ia->ia6_lifetime.ia6t_expire =
1220 time_second + ia->ia6_lifetime.ia6t_vltime;
1221 } else
1222 ia->ia6_lifetime.ia6t_expire = 0;
1223 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1224 ia->ia6_lifetime.ia6t_preferred =
1225 time_second + ia->ia6_lifetime.ia6t_pltime;
1226 } else
1227 ia->ia6_lifetime.ia6t_preferred = 0;
1228
1229 /* reset the interface and routing table appropriately. */
1230 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1231 goto unlink;
1232
1233 /*
1234 * configure address flags.
1235 */
1236 ia->ia6_flags = ifra->ifra_flags;
1237 /*
1238 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1239 * userland, make it deprecated.
1240 */
1241 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1242 ia->ia6_lifetime.ia6t_pltime = 0;
1243 ia->ia6_lifetime.ia6t_preferred = time_second;
1244 }
1245 /*
1246 * Make the address tentative before joining multicast addresses,
1247 * so that corresponding MLD responses would not have a tentative
1248 * source address.
1249 */
1250 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1251 if (hostIsNew && in6if_do_dad(ifp))
1252 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1253
1254 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
1255 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1256 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1257
1258 /*
1259 * We are done if we have simply modified an existing address.
1260 */
1261 if (!hostIsNew)
1262 return (error);
1263
1264 /*
1265 * Beyond this point, we should call in6_purgeaddr upon an error,
1266 * not just go to unlink.
1267 */
1268
1269 /* Join necessary multicast groups. */
1270 in6m_sol = NULL;
1271 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1272 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1273 if (error)
1274 goto cleanup;
1275 }
1276
1277 /*
1278 * Perform DAD, if needed.
1279 * XXX It may be of use, if we can administratively disable DAD.
1280 */
1281 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1282 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1283 {
1284 int mindelay, maxdelay;
1285
1286 delay = 0;
1287 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1288 /*
1289 * We need to impose a delay before sending an NS
1290 * for DAD. Check if we also needed a delay for the
1291 * corresponding MLD message. If we did, the delay
1292 * should be larger than the MLD delay (this could be
1293 * relaxed a bit, but this simple logic is at least
1294 * safe).
1295 * XXX: Break data hiding guidelines and look at
1296 * state for the solicited multicast group.
1297 */
1298 mindelay = 0;
1299 if (in6m_sol != NULL &&
1300 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1301 mindelay = in6m_sol->in6m_timer;
1302 }
1303 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1304 if (maxdelay - mindelay == 0)
1305 delay = 0;
1306 else {
1307 delay =
1308 (arc4random() % (maxdelay - mindelay)) +
1309 mindelay;
1310 }
1311 }
1312 nd6_dad_start((struct ifaddr *)ia, delay);
1313 }
1314
1315 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew"));
1316 ifa_free(&ia->ia_ifa);
1317 return (error);
1318
1319 unlink:
1320 /*
1321 * XXX: if a change of an existing address failed, keep the entry
1322 * anyway.
1323 */
1324 if (hostIsNew) {
1325 in6_unlink_ifa(ia, ifp);
1326 ifa_free(&ia->ia_ifa);
1327 }
1328 return (error);
1329
1330 cleanup:
1331 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew"));
1332 ifa_free(&ia->ia_ifa);
1333 in6_purgeaddr(&ia->ia_ifa);
1334 return error;
1335}
1336
1337/*
1338 * Leave multicast groups. Factored out from in6_purgeaddr().
1339 * This entire work should only be done once, for the default FIB.
1340 */
1341static int
1342in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0)
1343{
1344 struct sockaddr_in6 mltaddr, mltmask;
1345 struct in6_multi_mship *imm;
1346 struct rtentry *rt;
1347 struct sockaddr_in6 sin6;
1348 int error;
1349
1350 /*
1351 * Leave from multicast groups we have joined for the interface.
1352 */
1353 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1354 LIST_REMOVE(imm, i6mm_chain);
1355 in6_leavegroup(imm);
1356 }
1357
1358 /*
1359 * Remove the link-local all-nodes address.
1360 */
1361 bzero(&mltmask, sizeof(mltmask));
1362 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1363 mltmask.sin6_family = AF_INET6;
1364 mltmask.sin6_addr = in6mask32;
1365
1366 bzero(&mltaddr, sizeof(mltaddr));
1367 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1368 mltaddr.sin6_family = AF_INET6;
1369 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1370
1371 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1372 return (error);
1373
1374 /*
1375 * As for the mltaddr above, proactively prepare the sin6 to avoid
1376 * rtentry un- and re-locking.
1377 */
1378 if (ifa0 != NULL) {
1379 bzero(&sin6, sizeof(sin6));
1380 sin6.sin6_len = sizeof(sin6);
1381 sin6.sin6_family = AF_INET6;
1382 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1383 sizeof(sin6.sin6_addr));
1384 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL);
1385 if (error != 0)
1386 return (error);
1387 }
1388
1389 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1390 if (rt != NULL && rt->rt_gateway != NULL &&
1391 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1392 &ia->ia_addr.sin6_addr,
1393 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1394 /*
1395 * If no more IPv6 address exists on this interface then
1396 * remove the multicast address route.
1397 */
1398 if (ifa0 == NULL) {
1399 memcpy(&mltaddr.sin6_addr,
1400 &satosin6(rt_key(rt))->sin6_addr,
1401 sizeof(mltaddr.sin6_addr));
1402 RTFREE_LOCKED(rt);
1403 error = in6_rtrequest(RTM_DELETE,
1404 (struct sockaddr *)&mltaddr,
1405 (struct sockaddr *)&ia->ia_addr,
1406 (struct sockaddr *)&mltmask, RTF_UP,
1407 (struct rtentry **)0, RT_DEFAULT_FIB);
1408 if (error)
1409 log(LOG_INFO, "%s: link-local all-nodes "
1410 "multicast address deletion error\n",
1411 __func__);
1412 } else {
1413 /*
1414 * Replace the gateway of the route.
1415 */
1416 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1417 RTFREE_LOCKED(rt);
1418 }
1419 } else {
1420 if (rt != NULL)
1421 RTFREE_LOCKED(rt);
1422 }
1423
1424 /*
1425 * Remove the node-local all-nodes address.
1426 */
1427 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1428 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1429 return (error);
1430
1431 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1432 if (rt != NULL && rt->rt_gateway != NULL &&
1433 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1434 &ia->ia_addr.sin6_addr,
1435 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1436 /*
1437 * If no more IPv6 address exists on this interface then
1438 * remove the multicast address route.
1439 */
1440 if (ifa0 == NULL) {
1441 memcpy(&mltaddr.sin6_addr,
1442 &satosin6(rt_key(rt))->sin6_addr,
1443 sizeof(mltaddr.sin6_addr));
1444
1445 RTFREE_LOCKED(rt);
1446 error = in6_rtrequest(RTM_DELETE,
1447 (struct sockaddr *)&mltaddr,
1448 (struct sockaddr *)&ia->ia_addr,
1449 (struct sockaddr *)&mltmask, RTF_UP,
1450 (struct rtentry **)0, RT_DEFAULT_FIB);
1451 if (error)
1452 log(LOG_INFO, "%s: node-local all-nodes"
1453 "multicast address deletion error\n",
1454 __func__);
1455 } else {
1456 /*
1457 * Replace the gateway of the route.
1458 */
1459 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1460 RTFREE_LOCKED(rt);
1461 }
1462 } else {
1463 if (rt != NULL)
1464 RTFREE_LOCKED(rt);
1465 }
1466
1467 return (0);
1468}
1469
1470void
1471in6_purgeaddr(struct ifaddr *ifa)
1472{
1473 struct ifnet *ifp = ifa->ifa_ifp;
1474 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1475 int plen, error;
1476 struct ifaddr *ifa0;
1477
1478 if (ifa->ifa_carp)
1479 (*carp_detach_p)(ifa);
1480
1481 /*
1482 * find another IPv6 address as the gateway for the
1483 * link-local and node-local all-nodes multicast
1484 * address routes
1485 */
1486 IF_ADDR_RLOCK(ifp);
1487 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) {
1488 if ((ifa0->ifa_addr->sa_family != AF_INET6) ||
1489 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr,
1490 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0)
1491 continue;
1492 else
1493 break;
1494 }
1495 if (ifa0 != NULL)
1496 ifa_ref(ifa0);
1497 IF_ADDR_RUNLOCK(ifp);
1498
1499 /*
1500 * Remove the loopback route to the interface address.
1501 * The check for the current setting of "nd6_useloopback"
1502 * is not needed.
1503 */
1504 if (ia->ia_flags & IFA_RTSELF) {
1505 error = ifa_del_loopback_route((struct ifaddr *)ia,
1506 (struct sockaddr *)&ia->ia_addr);
1507 if (error == 0)
1508 ia->ia_flags &= ~IFA_RTSELF;
1509 }
1510
1511 /* stop DAD processing */
1512 nd6_dad_stop(ifa);
1513
1514 /* Remove local address entry from lltable. */
1515 in6_ifremloop(ifa);
1516
1517 /* Leave multicast groups. */
1518 error = in6_purgeaddr_mc(ifp, ia, ifa0);
1519
1520 if (ifa0 != NULL)
1521 ifa_free(ifa0);
1522
1523 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1524 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1525 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1526 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0);
1527 if (error != 0)
1528 log(LOG_INFO, "%s: err=%d, destination address delete "
1529 "failed\n", __func__, error);
1530 ia->ia_flags &= ~IFA_ROUTE;
1531 }
1532
1533 in6_unlink_ifa(ia, ifp);
1534}
1535
1536static void
1537in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1538{
1539
1540 IF_ADDR_WLOCK(ifp);
1541 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1542 IF_ADDR_WUNLOCK(ifp);
1543 ifa_free(&ia->ia_ifa); /* if_addrhead */
1544
1545 /*
1546 * Defer the release of what might be the last reference to the
1547 * in6_ifaddr so that it can't be freed before the remainder of the
1548 * cleanup.
1549 */
1550 IN6_IFADDR_WLOCK();
1551 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1552 LIST_REMOVE(ia, ia6_hash);
1553 IN6_IFADDR_WUNLOCK();
1554
1555 /*
1556 * Release the reference to the base prefix. There should be a
1557 * positive reference.
1558 */
1559 if (ia->ia6_ndpr == NULL) {
1560 nd6log((LOG_NOTICE,
1561 "in6_unlink_ifa: autoconf'ed address "
1562 "%p has no prefix\n", ia));
1563 } else {
1564 ia->ia6_ndpr->ndpr_refcnt--;
1565 ia->ia6_ndpr = NULL;
1566 }
1567
1568 /*
1569 * Also, if the address being removed is autoconf'ed, call
1570 * pfxlist_onlink_check() since the release might affect the status of
1571 * other (detached) addresses.
1572 */
1573 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1574 pfxlist_onlink_check();
1575 }
1576 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1577}
1578
1579void
1580in6_purgeif(struct ifnet *ifp)
1581{
1582 struct ifaddr *ifa, *nifa;
1583
1584 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) {
1585 if (ifa->ifa_addr->sa_family != AF_INET6)
1586 continue;
1587 in6_purgeaddr(ifa);
1588 }
1589
1590 in6_ifdetach(ifp);
1591}
1592
1593/*
1594 * SIOC[GAD]LIFADDR.
1595 * SIOCGLIFADDR: get first address. (?)
1596 * SIOCGLIFADDR with IFLR_PREFIX:
1597 * get first address that matches the specified prefix.
1598 * SIOCALIFADDR: add the specified address.
1599 * SIOCALIFADDR with IFLR_PREFIX:
1600 * add the specified prefix, filling hostid part from
1601 * the first link-local address. prefixlen must be <= 64.
1602 * SIOCDLIFADDR: delete the specified address.
1603 * SIOCDLIFADDR with IFLR_PREFIX:
1604 * delete the first address that matches the specified prefix.
1605 * return values:
1606 * EINVAL on invalid parameters
1607 * EADDRNOTAVAIL on prefix match failed/specified address not found
1608 * other values may be returned from in6_ioctl()
1609 *
1610 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1611 * this is to accomodate address naming scheme other than RFC2374,
1612 * in the future.
1613 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1614 * address encoding scheme. (see figure on page 8)
1615 */
1616static int
1617in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data,
1618 struct ifnet *ifp, struct thread *td)
1619{
1620 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1621 struct ifaddr *ifa;
1622 struct sockaddr *sa;
1623
1624 /* sanity checks */
1625 if (!data || !ifp) {
1626 panic("invalid argument to in6_lifaddr_ioctl");
1627 /* NOTREACHED */
1628 }
1629
1630 switch (cmd) {
1631 case SIOCGLIFADDR:
1632 /* address must be specified on GET with IFLR_PREFIX */
1633 if ((iflr->flags & IFLR_PREFIX) == 0)
1634 break;
1635 /* FALLTHROUGH */
1636 case SIOCALIFADDR:
1637 case SIOCDLIFADDR:
1638 /* address must be specified on ADD and DELETE */
1639 sa = (struct sockaddr *)&iflr->addr;
1640 if (sa->sa_family != AF_INET6)
1641 return EINVAL;
1642 if (sa->sa_len != sizeof(struct sockaddr_in6))
1643 return EINVAL;
1644 /* XXX need improvement */
1645 sa = (struct sockaddr *)&iflr->dstaddr;
1646 if (sa->sa_family && sa->sa_family != AF_INET6)
1647 return EINVAL;
1648 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1649 return EINVAL;
1650 break;
1651 default: /* shouldn't happen */
1652#if 0
1653 panic("invalid cmd to in6_lifaddr_ioctl");
1654 /* NOTREACHED */
1655#else
1656 return EOPNOTSUPP;
1657#endif
1658 }
1659 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1660 return EINVAL;
1661
1662 switch (cmd) {
1663 case SIOCALIFADDR:
1664 {
1665 struct in6_aliasreq ifra;
1666 struct in6_addr *hostid = NULL;
1667 int prefixlen;
1668
1669 ifa = NULL;
1670 if ((iflr->flags & IFLR_PREFIX) != 0) {
1671 struct sockaddr_in6 *sin6;
1672
1673 /*
1674 * hostid is to fill in the hostid part of the
1675 * address. hostid points to the first link-local
1676 * address attached to the interface.
1677 */
1678 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1679 if (!ifa)
1680 return EADDRNOTAVAIL;
1681 hostid = IFA_IN6(ifa);
1682
1683 /* prefixlen must be <= 64. */
1684 if (64 < iflr->prefixlen) {
1685 if (ifa != NULL)
1686 ifa_free(ifa);
1687 return EINVAL;
1688 }
1689 prefixlen = iflr->prefixlen;
1690
1691 /* hostid part must be zero. */
1692 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1693 if (sin6->sin6_addr.s6_addr32[2] != 0 ||
1694 sin6->sin6_addr.s6_addr32[3] != 0) {
1695 if (ifa != NULL)
1696 ifa_free(ifa);
1697 return EINVAL;
1698 }
1699 } else
1700 prefixlen = iflr->prefixlen;
1701
1702 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1703 bzero(&ifra, sizeof(ifra));
1704 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name));
1705
1706 bcopy(&iflr->addr, &ifra.ifra_addr,
1707 ((struct sockaddr *)&iflr->addr)->sa_len);
1708 if (hostid) {
1709 /* fill in hostid part */
1710 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1711 hostid->s6_addr32[2];
1712 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1713 hostid->s6_addr32[3];
1714 }
1715
1716 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */
1717 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1718 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1719 if (hostid) {
1720 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1721 hostid->s6_addr32[2];
1722 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1723 hostid->s6_addr32[3];
1724 }
1725 }
1726 if (ifa != NULL)
1727 ifa_free(ifa);
1728
1729 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1730 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1731
1732 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1733 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td);
1734 }
1735 case SIOCGLIFADDR:
1736 case SIOCDLIFADDR:
1737 {
1738 struct in6_ifaddr *ia;
1739 struct in6_addr mask, candidate, match;
1740 struct sockaddr_in6 *sin6;
1741 int cmp;
1742
1743 bzero(&mask, sizeof(mask));
1744 if (iflr->flags & IFLR_PREFIX) {
1745 /* lookup a prefix rather than address. */
1746 in6_prefixlen2mask(&mask, iflr->prefixlen);
1747
1748 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1749 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1750 match.s6_addr32[0] &= mask.s6_addr32[0];
1751 match.s6_addr32[1] &= mask.s6_addr32[1];
1752 match.s6_addr32[2] &= mask.s6_addr32[2];
1753 match.s6_addr32[3] &= mask.s6_addr32[3];
1754
1755 /* if you set extra bits, that's wrong */
1756 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1757 return EINVAL;
1758
1759 cmp = 1;
1760 } else {
1761 if (cmd == SIOCGLIFADDR) {
1762 /* on getting an address, take the 1st match */
1763 cmp = 0; /* XXX */
1764 } else {
1765 /* on deleting an address, do exact match */
1766 in6_prefixlen2mask(&mask, 128);
1767 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1768 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1769
1770 cmp = 1;
1771 }
1772 }
1773
1774 IF_ADDR_RLOCK(ifp);
1775 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1776 if (ifa->ifa_addr->sa_family != AF_INET6)
1777 continue;
1778 if (!cmp)
1779 break;
1780
1781 /*
1782 * XXX: this is adhoc, but is necessary to allow
1783 * a user to specify fe80::/64 (not /10) for a
1784 * link-local address.
1785 */
1786 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1787 in6_clearscope(&candidate);
1788 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1789 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1790 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1791 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1792 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1793 break;
1794 }
1795 if (ifa != NULL)
1796 ifa_ref(ifa);
1797 IF_ADDR_RUNLOCK(ifp);
1798 if (!ifa)
1799 return EADDRNOTAVAIL;
1800 ia = ifa2ia6(ifa);
1801
1802 if (cmd == SIOCGLIFADDR) {
1803 int error;
1804
1805 /* fill in the if_laddrreq structure */
1806 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1807 error = sa6_recoverscope(
1808 (struct sockaddr_in6 *)&iflr->addr);
1809 if (error != 0) {
1810 ifa_free(ifa);
1811 return (error);
1812 }
1813
1814 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1815 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1816 ia->ia_dstaddr.sin6_len);
1817 error = sa6_recoverscope(
1818 (struct sockaddr_in6 *)&iflr->dstaddr);
1819 if (error != 0) {
1820 ifa_free(ifa);
1821 return (error);
1822 }
1823 } else
1824 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1825
1826 iflr->prefixlen =
1827 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1828
1829 iflr->flags = ia->ia6_flags; /* XXX */
1830 ifa_free(ifa);
1831
1832 return 0;
1833 } else {
1834 struct in6_aliasreq ifra;
1835
1836 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1837 bzero(&ifra, sizeof(ifra));
1838 bcopy(iflr->iflr_name, ifra.ifra_name,
1839 sizeof(ifra.ifra_name));
1840
1841 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1842 ia->ia_addr.sin6_len);
1843 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1844 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1845 ia->ia_dstaddr.sin6_len);
1846 } else {
1847 bzero(&ifra.ifra_dstaddr,
1848 sizeof(ifra.ifra_dstaddr));
1849 }
1850 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1851 ia->ia_prefixmask.sin6_len);
1852
1853 ifra.ifra_flags = ia->ia6_flags;
1854 ifa_free(ifa);
1855 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
1856 ifp, td);
1857 }
1858 }
1859 }
1860
1861 return EOPNOTSUPP; /* just for safety */
1862}
1863
1864/*
1865 * Initialize an interface's IPv6 address and routing table entry.
1866 */
1867static int
1868in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
1869 struct sockaddr_in6 *sin6, int newhost)
1870{
1871 int error = 0, plen, ifacount = 0;
1872 struct ifaddr *ifa;
1873
1874 /*
1875 * Give the interface a chance to initialize
1876 * if this is its first address,
1877 * and to validate the address if necessary.
1878 */
1879 IF_ADDR_RLOCK(ifp);
1880 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1881 if (ifa->ifa_addr->sa_family != AF_INET6)
1882 continue;
1883 ifacount++;
1884 }
1885 IF_ADDR_RUNLOCK(ifp);
1886
1887 ia->ia_addr = *sin6;
1888
1889 if (ifacount <= 1 && ifp->if_ioctl) {
1890 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1891 if (error)
1892 return (error);
1893 }
1894
1895 ia->ia_ifa.ifa_metric = ifp->if_metric;
1896
1897 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1898
1899 /*
1900 * Special case:
1901 * If a new destination address is specified for a point-to-point
1902 * interface, install a route to the destination as an interface
1903 * direct route.
1904 * XXX: the logic below rejects assigning multiple addresses on a p2p
1905 * interface that share the same destination.
1906 */
1907 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1908 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1909 ia->ia_dstaddr.sin6_family == AF_INET6) {
1910 int rtflags = RTF_UP | RTF_HOST;
1911 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1912 if (error)
1913 return (error);
1914 ia->ia_flags |= IFA_ROUTE;
1915 /*
1916 * Handle the case for ::1 .
1917 */
1918 if (ifp->if_flags & IFF_LOOPBACK)
1919 ia->ia_flags |= IFA_RTSELF;
1920 }
1921
1922 /*
1923 * add a loopback route to self
1924 */
1925 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1926 error = ifa_add_loopback_route((struct ifaddr *)ia,
1927 (struct sockaddr *)&ia->ia_addr);
1928 if (error == 0)
1929 ia->ia_flags |= IFA_RTSELF;
1930 }
1931
1932 /* Add local address to lltable, if necessary (ex. on p2p link). */
1933 if (newhost)
1934 in6_ifaddloop(&(ia->ia_ifa));
1935
1936 return (error);
1937}
1938
1939/*
1940 * Find an IPv6 interface link-local address specific to an interface.
1941 * ifaddr is returned referenced.
1942 */
1943struct in6_ifaddr *
1944in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1945{
1946 struct ifaddr *ifa;
1947
1948 IF_ADDR_RLOCK(ifp);
1949 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1950 if (ifa->ifa_addr->sa_family != AF_INET6)
1951 continue;
1952 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1953 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1954 ignoreflags) != 0)
1955 continue;
1956 ifa_ref(ifa);
1957 break;
1958 }
1959 }
1960 IF_ADDR_RUNLOCK(ifp);
1961
1962 return ((struct in6_ifaddr *)ifa);
1963}
1964
1965
1966/*
1967 * find the internet address corresponding to a given interface and address.
1968 * ifaddr is returned referenced.
1969 */
1970struct in6_ifaddr *
1971in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1972{
1973 struct ifaddr *ifa;
1974
1975 IF_ADDR_RLOCK(ifp);
1976 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1977 if (ifa->ifa_addr->sa_family != AF_INET6)
1978 continue;
1979 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1980 ifa_ref(ifa);
1981 break;
1982 }
1983 }
1984 IF_ADDR_RUNLOCK(ifp);
1985
1986 return ((struct in6_ifaddr *)ifa);
1987}
1988
1989/*
| 65
66#include "opt_compat.h"
67#include "opt_inet.h"
68#include "opt_inet6.h"
69
70#include <sys/param.h>
71#include <sys/errno.h>
72#include <sys/jail.h>
73#include <sys/malloc.h>
74#include <sys/socket.h>
75#include <sys/socketvar.h>
76#include <sys/sockio.h>
77#include <sys/systm.h>
78#include <sys/priv.h>
79#include <sys/proc.h>
80#include <sys/time.h>
81#include <sys/kernel.h>
82#include <sys/syslog.h>
83
84#include <net/if.h>
85#include <net/if_var.h>
86#include <net/if_types.h>
87#include <net/route.h>
88#include <net/if_dl.h>
89#include <net/vnet.h>
90
91#include <netinet/in.h>
92#include <netinet/in_var.h>
93#include <net/if_llatbl.h>
94#include <netinet/if_ether.h>
95#include <netinet/in_systm.h>
96#include <netinet/ip.h>
97#include <netinet/in_pcb.h>
98#include <netinet/ip_carp.h>
99
100#include <netinet/ip6.h>
101#include <netinet6/ip6_var.h>
102#include <netinet6/nd6.h>
103#include <netinet6/mld6_var.h>
104#include <netinet6/ip6_mroute.h>
105#include <netinet6/in6_ifattach.h>
106#include <netinet6/scope6_var.h>
107#include <netinet6/in6_pcb.h>
108
109VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
110#define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
111
112/*
113 * Definitions of some costant IP6 addresses.
114 */
115const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
116const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
117const struct in6_addr in6addr_nodelocal_allnodes =
118 IN6ADDR_NODELOCAL_ALLNODES_INIT;
119const struct in6_addr in6addr_linklocal_allnodes =
120 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
121const struct in6_addr in6addr_linklocal_allrouters =
122 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
123const struct in6_addr in6addr_linklocal_allv2routers =
124 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
125
126const struct in6_addr in6mask0 = IN6MASK0;
127const struct in6_addr in6mask32 = IN6MASK32;
128const struct in6_addr in6mask64 = IN6MASK64;
129const struct in6_addr in6mask96 = IN6MASK96;
130const struct in6_addr in6mask128 = IN6MASK128;
131
132const struct sockaddr_in6 sa6_any =
133 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
134
135static int in6_lifaddr_ioctl(struct socket *, u_long, caddr_t,
136 struct ifnet *, struct thread *);
137static int in6_ifinit(struct ifnet *, struct in6_ifaddr *,
138 struct sockaddr_in6 *, int);
139static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
140
141int (*faithprefix_p)(struct in6_addr *);
142
143#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
144#define ia62ifa(ia6) (&((ia6)->ia_ifa))
145
146void
147in6_ifaddloop(struct ifaddr *ifa)
148{
149 struct sockaddr_dl gateway;
150 struct sockaddr_in6 mask, addr;
151 struct rtentry rt;
152 struct in6_ifaddr *ia;
153 struct ifnet *ifp;
154 struct llentry *ln;
155
156 ia = ifa2ia6(ifa);
157 ifp = ifa->ifa_ifp;
158 IF_AFDATA_LOCK(ifp);
159 ifa->ifa_rtrequest = nd6_rtrequest;
160 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR |
161 LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr);
162 IF_AFDATA_UNLOCK(ifp);
163 if (ln != NULL) {
164 ln->la_expire = 0; /* for IPv6 this means permanent */
165 ln->ln_state = ND6_LLINFO_REACHABLE;
166 /*
167 * initialize for rtmsg generation
168 */
169 bzero(&gateway, sizeof(gateway));
170 gateway.sdl_len = sizeof(gateway);
171 gateway.sdl_family = AF_LINK;
172 gateway.sdl_nlen = 0;
173 gateway.sdl_alen = 6;
174 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned,
175 sizeof(ln->ll_addr));
176 LLE_WUNLOCK(ln);
177 }
178
179 bzero(&rt, sizeof(rt));
180 rt.rt_gateway = (struct sockaddr *)&gateway;
181 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
182 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
183 rt_mask(&rt) = (struct sockaddr *)&mask;
184 rt_key(&rt) = (struct sockaddr *)&addr;
185 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC;
186 /* Announce arrival of local address to all FIBs. */
187 rt_newaddrmsg(RTM_ADD, ifa, 0, &rt);
188}
189
190void
191in6_ifremloop(struct ifaddr *ifa)
192{
193 struct sockaddr_dl gateway;
194 struct sockaddr_in6 mask, addr;
195 struct rtentry rt0;
196 struct in6_ifaddr *ia;
197 struct ifnet *ifp;
198
199 ia = ifa2ia6(ifa);
200 ifp = ifa->ifa_ifp;
201 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
202 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
203 lltable_prefix_free(AF_INET6, (struct sockaddr *)&addr,
204 (struct sockaddr *)&mask, LLE_STATIC);
205
206 /*
207 * initialize for rtmsg generation
208 */
209 bzero(&gateway, sizeof(gateway));
210 gateway.sdl_len = sizeof(gateway);
211 gateway.sdl_family = AF_LINK;
212 gateway.sdl_nlen = 0;
213 gateway.sdl_alen = ifp->if_addrlen;
214 bzero(&rt0, sizeof(rt0));
215 rt0.rt_gateway = (struct sockaddr *)&gateway;
216 rt_mask(&rt0) = (struct sockaddr *)&mask;
217 rt_key(&rt0) = (struct sockaddr *)&addr;
218 rt0.rt_flags = RTF_HOST | RTF_STATIC;
219 /* Announce removal of local address to all FIBs. */
220 rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0);
221}
222
223int
224in6_mask2len(struct in6_addr *mask, u_char *lim0)
225{
226 int x = 0, y;
227 u_char *lim = lim0, *p;
228
229 /* ignore the scope_id part */
230 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
231 lim = (u_char *)mask + sizeof(*mask);
232 for (p = (u_char *)mask; p < lim; x++, p++) {
233 if (*p != 0xff)
234 break;
235 }
236 y = 0;
237 if (p < lim) {
238 for (y = 0; y < 8; y++) {
239 if ((*p & (0x80 >> y)) == 0)
240 break;
241 }
242 }
243
244 /*
245 * when the limit pointer is given, do a stricter check on the
246 * remaining bits.
247 */
248 if (p < lim) {
249 if (y != 0 && (*p & (0x00ff >> y)) != 0)
250 return (-1);
251 for (p = p + 1; p < lim; p++)
252 if (*p != 0)
253 return (-1);
254 }
255
256 return x * 8 + y;
257}
258
259#ifdef COMPAT_FREEBSD32
260struct in6_ndifreq32 {
261 char ifname[IFNAMSIZ];
262 uint32_t ifindex;
263};
264#define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
265#endif
266
267int
268in6_control(struct socket *so, u_long cmd, caddr_t data,
269 struct ifnet *ifp, struct thread *td)
270{
271 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
272 struct in6_ifaddr *ia = NULL;
273 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
274 struct sockaddr_in6 *sa6;
275 int carp_attached = 0;
276 int error;
277 u_long ocmd = cmd;
278
279 /*
280 * Compat to make pre-10.x ifconfig(8) operable.
281 */
282 if (cmd == OSIOCAIFADDR_IN6)
283 cmd = SIOCAIFADDR_IN6;
284
285 switch (cmd) {
286 case SIOCGETSGCNT_IN6:
287 case SIOCGETMIFCNT_IN6:
288 /*
289 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
290 * We cannot see how that would be needed, so do not adjust the
291 * KPI blindly; more likely should clean up the IPv4 variant.
292 */
293 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
294 }
295
296 switch(cmd) {
297 case SIOCAADDRCTL_POLICY:
298 case SIOCDADDRCTL_POLICY:
299 if (td != NULL) {
300 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
301 if (error)
302 return (error);
303 }
304 return (in6_src_ioctl(cmd, data));
305 }
306
307 if (ifp == NULL)
308 return (EOPNOTSUPP);
309
310 switch (cmd) {
311 case SIOCSNDFLUSH_IN6:
312 case SIOCSPFXFLUSH_IN6:
313 case SIOCSRTRFLUSH_IN6:
314 case SIOCSDEFIFACE_IN6:
315 case SIOCSIFINFO_FLAGS:
316 case SIOCSIFINFO_IN6:
317 if (td != NULL) {
318 error = priv_check(td, PRIV_NETINET_ND6);
319 if (error)
320 return (error);
321 }
322 /* FALLTHROUGH */
323 case OSIOCGIFINFO_IN6:
324 case SIOCGIFINFO_IN6:
325 case SIOCGDRLST_IN6:
326 case SIOCGPRLST_IN6:
327 case SIOCGNBRINFO_IN6:
328 case SIOCGDEFIFACE_IN6:
329 return (nd6_ioctl(cmd, data, ifp));
330
331#ifdef COMPAT_FREEBSD32
332 case SIOCGDEFIFACE32_IN6:
333 {
334 struct in6_ndifreq ndif;
335 struct in6_ndifreq32 *ndif32;
336
337 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
338 ifp);
339 if (error)
340 return (error);
341 ndif32 = (struct in6_ndifreq32 *)data;
342 ndif32->ifindex = ndif.ifindex;
343 return (0);
344 }
345#endif
346 }
347
348 switch (cmd) {
349 case SIOCSIFPREFIX_IN6:
350 case SIOCDIFPREFIX_IN6:
351 case SIOCAIFPREFIX_IN6:
352 case SIOCCIFPREFIX_IN6:
353 case SIOCSGIFPREFIX_IN6:
354 case SIOCGIFPREFIX_IN6:
355 log(LOG_NOTICE,
356 "prefix ioctls are now invalidated. "
357 "please use ifconfig.\n");
358 return (EOPNOTSUPP);
359 }
360
361 switch (cmd) {
362 case SIOCSSCOPE6:
363 if (td != NULL) {
364 error = priv_check(td, PRIV_NETINET_SCOPE6);
365 if (error)
366 return (error);
367 }
368 return (scope6_set(ifp,
369 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
370 case SIOCGSCOPE6:
371 return (scope6_get(ifp,
372 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
373 case SIOCGSCOPE6DEF:
374 return (scope6_get_default((struct scope6_id *)
375 ifr->ifr_ifru.ifru_scope_id));
376 }
377
378 switch (cmd) {
379 case SIOCALIFADDR:
380 if (td != NULL) {
381 error = priv_check(td, PRIV_NET_ADDIFADDR);
382 if (error)
383 return (error);
384 }
385 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
386
387 case SIOCDLIFADDR:
388 if (td != NULL) {
389 error = priv_check(td, PRIV_NET_DELIFADDR);
390 if (error)
391 return (error);
392 }
393 /* FALLTHROUGH */
394 case SIOCGLIFADDR:
395 return in6_lifaddr_ioctl(so, cmd, data, ifp, td);
396 }
397
398 /*
399 * Find address for this interface, if it exists.
400 *
401 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
402 * only, and used the first interface address as the target of other
403 * operations (without checking ifra_addr). This was because netinet
404 * code/API assumed at most 1 interface address per interface.
405 * Since IPv6 allows a node to assign multiple addresses
406 * on a single interface, we almost always look and check the
407 * presence of ifra_addr, and reject invalid ones here.
408 * It also decreases duplicated code among SIOC*_IN6 operations.
409 */
410 switch (cmd) {
411 case SIOCAIFADDR_IN6:
412 case SIOCSIFPHYADDR_IN6:
413 sa6 = &ifra->ifra_addr;
414 break;
415 case SIOCSIFADDR_IN6:
416 case SIOCGIFADDR_IN6:
417 case SIOCSIFDSTADDR_IN6:
418 case SIOCSIFNETMASK_IN6:
419 case SIOCGIFDSTADDR_IN6:
420 case SIOCGIFNETMASK_IN6:
421 case SIOCDIFADDR_IN6:
422 case SIOCGIFPSRCADDR_IN6:
423 case SIOCGIFPDSTADDR_IN6:
424 case SIOCGIFAFLAG_IN6:
425 case SIOCSNDFLUSH_IN6:
426 case SIOCSPFXFLUSH_IN6:
427 case SIOCSRTRFLUSH_IN6:
428 case SIOCGIFALIFETIME_IN6:
429 case SIOCSIFALIFETIME_IN6:
430 case SIOCGIFSTAT_IN6:
431 case SIOCGIFSTAT_ICMP6:
432 sa6 = &ifr->ifr_addr;
433 break;
434 default:
435 sa6 = NULL;
436 break;
437 }
438 if (sa6 && sa6->sin6_family == AF_INET6) {
439 if (sa6->sin6_scope_id != 0)
440 error = sa6_embedscope(sa6, 0);
441 else
442 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
443 if (error != 0)
444 return (error);
445 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
446 &sa6->sin6_addr)) != 0)
447 return (error);
448 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
449 } else
450 ia = NULL;
451
452 switch (cmd) {
453 case SIOCSIFADDR_IN6:
454 case SIOCSIFDSTADDR_IN6:
455 case SIOCSIFNETMASK_IN6:
456 /*
457 * Since IPv6 allows a node to assign multiple addresses
458 * on a single interface, SIOCSIFxxx ioctls are deprecated.
459 */
460 /* we decided to obsolete this command (20000704) */
461 error = EINVAL;
462 goto out;
463
464 case SIOCDIFADDR_IN6:
465 /*
466 * for IPv4, we look for existing in_ifaddr here to allow
467 * "ifconfig if0 delete" to remove the first IPv4 address on
468 * the interface. For IPv6, as the spec allows multiple
469 * interface address from the day one, we consider "remove the
470 * first one" semantics to be not preferable.
471 */
472 if (ia == NULL) {
473 error = EADDRNOTAVAIL;
474 goto out;
475 }
476 /* FALLTHROUGH */
477 case SIOCAIFADDR_IN6:
478 /*
479 * We always require users to specify a valid IPv6 address for
480 * the corresponding operation.
481 */
482 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
483 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
484 error = EAFNOSUPPORT;
485 goto out;
486 }
487
488 if (td != NULL) {
489 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
490 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
491 if (error)
492 goto out;
493 }
494 break;
495
496 case SIOCGIFADDR_IN6:
497 /* This interface is basically deprecated. use SIOCGIFCONF. */
498 /* FALLTHROUGH */
499 case SIOCGIFAFLAG_IN6:
500 case SIOCGIFNETMASK_IN6:
501 case SIOCGIFDSTADDR_IN6:
502 case SIOCGIFALIFETIME_IN6:
503 /* must think again about its semantics */
504 if (ia == NULL) {
505 error = EADDRNOTAVAIL;
506 goto out;
507 }
508 break;
509
510 case SIOCSIFALIFETIME_IN6:
511 {
512 struct in6_addrlifetime *lt;
513
514 if (td != NULL) {
515 error = priv_check(td, PRIV_NETINET_ALIFETIME6);
516 if (error)
517 goto out;
518 }
519 if (ia == NULL) {
520 error = EADDRNOTAVAIL;
521 goto out;
522 }
523 /* sanity for overflow - beware unsigned */
524 lt = &ifr->ifr_ifru.ifru_lifetime;
525 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
526 lt->ia6t_vltime + time_second < time_second) {
527 error = EINVAL;
528 goto out;
529 }
530 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
531 lt->ia6t_pltime + time_second < time_second) {
532 error = EINVAL;
533 goto out;
534 }
535 break;
536 }
537 }
538
539 switch (cmd) {
540 case SIOCGIFADDR_IN6:
541 ifr->ifr_addr = ia->ia_addr;
542 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
543 goto out;
544 break;
545
546 case SIOCGIFDSTADDR_IN6:
547 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
548 error = EINVAL;
549 goto out;
550 }
551 /*
552 * XXX: should we check if ifa_dstaddr is NULL and return
553 * an error?
554 */
555 ifr->ifr_dstaddr = ia->ia_dstaddr;
556 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
557 goto out;
558 break;
559
560 case SIOCGIFNETMASK_IN6:
561 ifr->ifr_addr = ia->ia_prefixmask;
562 break;
563
564 case SIOCGIFAFLAG_IN6:
565 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
566 break;
567
568 case SIOCGIFSTAT_IN6:
569 if (ifp == NULL) {
570 error = EINVAL;
571 goto out;
572 }
573 bzero(&ifr->ifr_ifru.ifru_stat,
574 sizeof(ifr->ifr_ifru.ifru_stat));
575 ifr->ifr_ifru.ifru_stat =
576 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat;
577 break;
578
579 case SIOCGIFSTAT_ICMP6:
580 if (ifp == NULL) {
581 error = EINVAL;
582 goto out;
583 }
584 bzero(&ifr->ifr_ifru.ifru_icmp6stat,
585 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
586 ifr->ifr_ifru.ifru_icmp6stat =
587 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat;
588 break;
589
590 case SIOCGIFALIFETIME_IN6:
591 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
592 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
593 time_t maxexpire;
594 struct in6_addrlifetime *retlt =
595 &ifr->ifr_ifru.ifru_lifetime;
596
597 /*
598 * XXX: adjust expiration time assuming time_t is
599 * signed.
600 */
601 maxexpire = (-1) &
602 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
603 if (ia->ia6_lifetime.ia6t_vltime <
604 maxexpire - ia->ia6_updatetime) {
605 retlt->ia6t_expire = ia->ia6_updatetime +
606 ia->ia6_lifetime.ia6t_vltime;
607 } else
608 retlt->ia6t_expire = maxexpire;
609 }
610 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
611 time_t maxexpire;
612 struct in6_addrlifetime *retlt =
613 &ifr->ifr_ifru.ifru_lifetime;
614
615 /*
616 * XXX: adjust expiration time assuming time_t is
617 * signed.
618 */
619 maxexpire = (-1) &
620 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
621 if (ia->ia6_lifetime.ia6t_pltime <
622 maxexpire - ia->ia6_updatetime) {
623 retlt->ia6t_preferred = ia->ia6_updatetime +
624 ia->ia6_lifetime.ia6t_pltime;
625 } else
626 retlt->ia6t_preferred = maxexpire;
627 }
628 break;
629
630 case SIOCSIFALIFETIME_IN6:
631 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
632 /* for sanity */
633 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
634 ia->ia6_lifetime.ia6t_expire =
635 time_second + ia->ia6_lifetime.ia6t_vltime;
636 } else
637 ia->ia6_lifetime.ia6t_expire = 0;
638 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
639 ia->ia6_lifetime.ia6t_preferred =
640 time_second + ia->ia6_lifetime.ia6t_pltime;
641 } else
642 ia->ia6_lifetime.ia6t_preferred = 0;
643 break;
644
645 case SIOCAIFADDR_IN6:
646 {
647 int i;
648 struct nd_prefixctl pr0;
649 struct nd_prefix *pr;
650
651 /*
652 * first, make or update the interface address structure,
653 * and link it to the list.
654 */
655 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
656 goto out;
657 if (ia != NULL)
658 ifa_free(&ia->ia_ifa);
659 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
660 == NULL) {
661 /*
662 * this can happen when the user specify the 0 valid
663 * lifetime.
664 */
665 break;
666 }
667
668 if (cmd == ocmd && ifra->ifra_vhid > 0) {
669 if (carp_attach_p != NULL)
670 error = (*carp_attach_p)(&ia->ia_ifa,
671 ifra->ifra_vhid);
672 else
673 error = EPROTONOSUPPORT;
674 if (error)
675 goto out;
676 else
677 carp_attached = 1;
678 }
679
680 /*
681 * then, make the prefix on-link on the interface.
682 * XXX: we'd rather create the prefix before the address, but
683 * we need at least one address to install the corresponding
684 * interface route, so we configure the address first.
685 */
686
687 /*
688 * convert mask to prefix length (prefixmask has already
689 * been validated in in6_update_ifa().
690 */
691 bzero(&pr0, sizeof(pr0));
692 pr0.ndpr_ifp = ifp;
693 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
694 NULL);
695 if (pr0.ndpr_plen == 128) {
696 break; /* we don't need to install a host route. */
697 }
698 pr0.ndpr_prefix = ifra->ifra_addr;
699 /* apply the mask for safety. */
700 for (i = 0; i < 4; i++) {
701 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
702 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
703 }
704 /*
705 * XXX: since we don't have an API to set prefix (not address)
706 * lifetimes, we just use the same lifetimes as addresses.
707 * The (temporarily) installed lifetimes can be overridden by
708 * later advertised RAs (when accept_rtadv is non 0), which is
709 * an intended behavior.
710 */
711 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
712 pr0.ndpr_raf_auto =
713 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
714 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
715 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
716
717 /* add the prefix if not yet. */
718 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
719 /*
720 * nd6_prelist_add will install the corresponding
721 * interface route.
722 */
723 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
724 if (carp_attached)
725 (*carp_detach_p)(&ia->ia_ifa);
726 goto out;
727 }
728 if (pr == NULL) {
729 if (carp_attached)
730 (*carp_detach_p)(&ia->ia_ifa);
731 log(LOG_ERR, "nd6_prelist_add succeeded but "
732 "no prefix\n");
733 error = EINVAL;
734 goto out;
735 }
736 }
737
738 /* relate the address to the prefix */
739 if (ia->ia6_ndpr == NULL) {
740 ia->ia6_ndpr = pr;
741 pr->ndpr_refcnt++;
742
743 /*
744 * If this is the first autoconf address from the
745 * prefix, create a temporary address as well
746 * (when required).
747 */
748 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
749 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
750 int e;
751 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
752 log(LOG_NOTICE, "in6_control: failed "
753 "to create a temporary address, "
754 "errno=%d\n", e);
755 }
756 }
757 }
758
759 /*
760 * this might affect the status of autoconfigured addresses,
761 * that is, this address might make other addresses detached.
762 */
763 pfxlist_onlink_check();
764 if (error == 0 && ia) {
765 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
766 /*
767 * Try to clear the flag when a new
768 * IPv6 address is added onto an
769 * IFDISABLED interface and it
770 * succeeds.
771 */
772 struct in6_ndireq nd;
773
774 memset(&nd, 0, sizeof(nd));
775 nd.ndi.flags = ND_IFINFO(ifp)->flags;
776 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
777 if (nd6_ioctl(SIOCSIFINFO_FLAGS,
778 (caddr_t)&nd, ifp) < 0)
779 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
780 "SIOCSIFINFO_FLAGS for -ifdisabled "
781 "failed.");
782 /*
783 * Ignore failure of clearing the flag
784 * intentionally. The failure means
785 * address duplication was detected.
786 */
787 }
788 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
789 }
790 break;
791 }
792
793 case SIOCDIFADDR_IN6:
794 {
795 struct nd_prefix *pr;
796
797 /*
798 * If the address being deleted is the only one that owns
799 * the corresponding prefix, expire the prefix as well.
800 * XXX: theoretically, we don't have to worry about such
801 * relationship, since we separate the address management
802 * and the prefix management. We do this, however, to provide
803 * as much backward compatibility as possible in terms of
804 * the ioctl operation.
805 * Note that in6_purgeaddr() will decrement ndpr_refcnt.
806 */
807 pr = ia->ia6_ndpr;
808 in6_purgeaddr(&ia->ia_ifa);
809 if (pr && pr->ndpr_refcnt == 0)
810 prelist_remove(pr);
811 EVENTHANDLER_INVOKE(ifaddr_event, ifp);
812 break;
813 }
814
815 default:
816 if (ifp == NULL || ifp->if_ioctl == 0) {
817 error = EOPNOTSUPP;
818 goto out;
819 }
820 error = (*ifp->if_ioctl)(ifp, cmd, data);
821 goto out;
822 }
823
824 error = 0;
825out:
826 if (ia != NULL)
827 ifa_free(&ia->ia_ifa);
828 return (error);
829}
830
831
832/*
833 * Join necessary multicast groups. Factored out from in6_update_ifa().
834 * This entire work should only be done once, for the default FIB.
835 */
836static int
837in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
838 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
839{
840 char ip6buf[INET6_ADDRSTRLEN];
841 struct sockaddr_in6 mltaddr, mltmask;
842 struct in6_addr llsol;
843 struct in6_multi_mship *imm;
844 struct rtentry *rt;
845 int delay, error;
846
847 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
848
849 /* Join solicited multicast addr for new host id. */
850 bzero(&llsol, sizeof(struct in6_addr));
851 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
852 llsol.s6_addr32[1] = 0;
853 llsol.s6_addr32[2] = htonl(1);
854 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
855 llsol.s6_addr8[12] = 0xff;
856 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) {
857 /* XXX: should not happen */
858 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
859 goto cleanup;
860 }
861 delay = 0;
862 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
863 /*
864 * We need a random delay for DAD on the address being
865 * configured. It also means delaying transmission of the
866 * corresponding MLD report to avoid report collision.
867 * [RFC 4861, Section 6.3.7]
868 */
869 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
870 }
871 imm = in6_joingroup(ifp, &llsol, &error, delay);
872 if (imm == NULL) {
873 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
874 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol),
875 if_name(ifp), error));
876 goto cleanup;
877 }
878 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
879 *in6m_sol = imm->i6mm_maddr;
880
881 bzero(&mltmask, sizeof(mltmask));
882 mltmask.sin6_len = sizeof(struct sockaddr_in6);
883 mltmask.sin6_family = AF_INET6;
884 mltmask.sin6_addr = in6mask32;
885#define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */
886
887 /*
888 * Join link-local all-nodes address.
889 */
890 bzero(&mltaddr, sizeof(mltaddr));
891 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
892 mltaddr.sin6_family = AF_INET6;
893 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
894 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
895 goto cleanup; /* XXX: should not fail */
896
897 /*
898 * XXX: do we really need this automatic routes? We should probably
899 * reconsider this stuff. Most applications actually do not need the
900 * routes, since they usually specify the outgoing interface.
901 */
902 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
903 if (rt != NULL) {
904 /* XXX: only works in !SCOPEDROUTING case. */
905 if (memcmp(&mltaddr.sin6_addr,
906 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
907 MLTMASK_LEN)) {
908 RTFREE_LOCKED(rt);
909 rt = NULL;
910 }
911 }
912 if (rt == NULL) {
913 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
914 (struct sockaddr *)&ia->ia_addr,
915 (struct sockaddr *)&mltmask, RTF_UP,
916 (struct rtentry **)0, RT_DEFAULT_FIB);
917 if (error)
918 goto cleanup;
919 } else
920 RTFREE_LOCKED(rt);
921
922 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
923 if (imm == NULL) {
924 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
925 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
926 &mltaddr.sin6_addr), if_name(ifp), error));
927 goto cleanup;
928 }
929 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
930
931 /*
932 * Join node information group address.
933 */
934 delay = 0;
935 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
936 /*
937 * The spec does not say anything about delay for this group,
938 * but the same logic should apply.
939 */
940 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
941 }
942 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
943 /* XXX jinmei */
944 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
945 if (imm == NULL)
946 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
947 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
948 &mltaddr.sin6_addr), if_name(ifp), error));
949 /* XXX not very fatal, go on... */
950 else
951 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
952 }
953 if (V_icmp6_nodeinfo_oldmcprefix &&
954 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) {
955 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay);
956 if (imm == NULL)
957 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
958 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
959 &mltaddr.sin6_addr), if_name(ifp), error));
960 /* XXX not very fatal, go on... */
961 else
962 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
963 }
964
965 /*
966 * Join interface-local all-nodes address.
967 * (ff01::1%ifN, and ff01::%ifN/32)
968 */
969 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
970 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
971 goto cleanup; /* XXX: should not fail */
972 /* XXX: again, do we really need the route? */
973 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
974 if (rt != NULL) {
975 if (memcmp(&mltaddr.sin6_addr,
976 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr,
977 MLTMASK_LEN)) {
978 RTFREE_LOCKED(rt);
979 rt = NULL;
980 }
981 }
982 if (rt == NULL) {
983 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr,
984 (struct sockaddr *)&ia->ia_addr,
985 (struct sockaddr *)&mltmask, RTF_UP,
986 (struct rtentry **)0, RT_DEFAULT_FIB);
987 if (error)
988 goto cleanup;
989 } else
990 RTFREE_LOCKED(rt);
991
992 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0);
993 if (imm == NULL) {
994 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s "
995 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
996 &mltaddr.sin6_addr), if_name(ifp), error));
997 goto cleanup;
998 }
999 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
1000#undef MLTMASK_LEN
1001
1002cleanup:
1003 return (error);
1004}
1005
1006/*
1007 * Update parameters of an IPv6 interface address.
1008 * If necessary, a new entry is created and linked into address chains.
1009 * This function is separated from in6_control().
1010 */
1011int
1012in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1013 struct in6_ifaddr *ia, int flags)
1014{
1015 int error = 0, hostIsNew = 0, plen = -1;
1016 struct sockaddr_in6 dst6;
1017 struct in6_addrlifetime *lt;
1018 struct in6_multi *in6m_sol;
1019 int delay;
1020 char ip6buf[INET6_ADDRSTRLEN];
1021
1022 /* Validate parameters */
1023 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
1024 return (EINVAL);
1025
1026 /*
1027 * The destination address for a p2p link must have a family
1028 * of AF_UNSPEC or AF_INET6.
1029 */
1030 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
1031 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
1032 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
1033 return (EAFNOSUPPORT);
1034 /*
1035 * validate ifra_prefixmask. don't check sin6_family, netmask
1036 * does not carry fields other than sin6_len.
1037 */
1038 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
1039 return (EINVAL);
1040 /*
1041 * Because the IPv6 address architecture is classless, we require
1042 * users to specify a (non 0) prefix length (mask) for a new address.
1043 * We also require the prefix (when specified) mask is valid, and thus
1044 * reject a non-consecutive mask.
1045 */
1046 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
1047 return (EINVAL);
1048 if (ifra->ifra_prefixmask.sin6_len != 0) {
1049 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
1050 (u_char *)&ifra->ifra_prefixmask +
1051 ifra->ifra_prefixmask.sin6_len);
1052 if (plen <= 0)
1053 return (EINVAL);
1054 } else {
1055 /*
1056 * In this case, ia must not be NULL. We just use its prefix
1057 * length.
1058 */
1059 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1060 }
1061 /*
1062 * If the destination address on a p2p interface is specified,
1063 * and the address is a scoped one, validate/set the scope
1064 * zone identifier.
1065 */
1066 dst6 = ifra->ifra_dstaddr;
1067 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
1068 (dst6.sin6_family == AF_INET6)) {
1069 struct in6_addr in6_tmp;
1070 u_int32_t zoneid;
1071
1072 in6_tmp = dst6.sin6_addr;
1073 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1074 return (EINVAL); /* XXX: should be impossible */
1075
1076 if (dst6.sin6_scope_id != 0) {
1077 if (dst6.sin6_scope_id != zoneid)
1078 return (EINVAL);
1079 } else /* user omit to specify the ID. */
1080 dst6.sin6_scope_id = zoneid;
1081
1082 /* convert into the internal form */
1083 if (sa6_embedscope(&dst6, 0))
1084 return (EINVAL); /* XXX: should be impossible */
1085 }
1086 /*
1087 * The destination address can be specified only for a p2p or a
1088 * loopback interface. If specified, the corresponding prefix length
1089 * must be 128.
1090 */
1091 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1092 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1093 /* XXX: noisy message */
1094 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1095 "be specified for a p2p or a loopback IF only\n"));
1096 return (EINVAL);
1097 }
1098 if (plen != 128) {
1099 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1100 "be 128 when dstaddr is specified\n"));
1101 return (EINVAL);
1102 }
1103 }
1104 /* lifetime consistency check */
1105 lt = &ifra->ifra_lifetime;
1106 if (lt->ia6t_pltime > lt->ia6t_vltime)
1107 return (EINVAL);
1108 if (lt->ia6t_vltime == 0) {
1109 /*
1110 * the following log might be noisy, but this is a typical
1111 * configuration mistake or a tool's bug.
1112 */
1113 nd6log((LOG_INFO,
1114 "in6_update_ifa: valid lifetime is 0 for %s\n",
1115 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1116
1117 if (ia == NULL)
1118 return (0); /* there's nothing to do */
1119 }
1120
1121 /*
1122 * If this is a new address, allocate a new ifaddr and link it
1123 * into chains.
1124 */
1125 if (ia == NULL) {
1126 hostIsNew = 1;
1127 /*
1128 * When in6_update_ifa() is called in a process of a received
1129 * RA, it is called under an interrupt context. So, we should
1130 * call malloc with M_NOWAIT.
1131 */
1132 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR,
1133 M_NOWAIT);
1134 if (ia == NULL)
1135 return (ENOBUFS);
1136 bzero((caddr_t)ia, sizeof(*ia));
1137 ifa_init(&ia->ia_ifa);
1138 LIST_INIT(&ia->ia6_memberships);
1139 /* Initialize the address and masks, and put time stamp */
1140 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1141 ia->ia_addr.sin6_family = AF_INET6;
1142 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1143 ia->ia6_createtime = time_second;
1144 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1145 /*
1146 * XXX: some functions expect that ifa_dstaddr is not
1147 * NULL for p2p interfaces.
1148 */
1149 ia->ia_ifa.ifa_dstaddr =
1150 (struct sockaddr *)&ia->ia_dstaddr;
1151 } else {
1152 ia->ia_ifa.ifa_dstaddr = NULL;
1153 }
1154 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1155 ia->ia_ifp = ifp;
1156 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1157 IF_ADDR_WLOCK(ifp);
1158 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1159 IF_ADDR_WUNLOCK(ifp);
1160
1161 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1162 IN6_IFADDR_WLOCK();
1163 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1164 LIST_INSERT_HEAD(IN6ADDR_HASH(&ifra->ifra_addr.sin6_addr),
1165 ia, ia6_hash);
1166 IN6_IFADDR_WUNLOCK();
1167 }
1168
1169 /* update timestamp */
1170 ia->ia6_updatetime = time_second;
1171
1172 /* set prefix mask */
1173 if (ifra->ifra_prefixmask.sin6_len) {
1174 /*
1175 * We prohibit changing the prefix length of an existing
1176 * address, because
1177 * + such an operation should be rare in IPv6, and
1178 * + the operation would confuse prefix management.
1179 */
1180 if (ia->ia_prefixmask.sin6_len &&
1181 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1182 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an"
1183 " existing (%s) address should not be changed\n",
1184 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1185 error = EINVAL;
1186 goto unlink;
1187 }
1188 ia->ia_prefixmask = ifra->ifra_prefixmask;
1189 ia->ia_prefixmask.sin6_family = AF_INET6;
1190 }
1191
1192 /*
1193 * If a new destination address is specified, scrub the old one and
1194 * install the new destination. Note that the interface must be
1195 * p2p or loopback (see the check above.)
1196 */
1197 if (dst6.sin6_family == AF_INET6 &&
1198 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1199 int e;
1200
1201 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1202 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) {
1203 nd6log((LOG_ERR, "in6_update_ifa: failed to remove "
1204 "a route to the old destination: %s\n",
1205 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1206 /* proceed anyway... */
1207 } else
1208 ia->ia_flags &= ~IFA_ROUTE;
1209 ia->ia_dstaddr = dst6;
1210 }
1211
1212 /*
1213 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1214 * to see if the address is deprecated or invalidated, but initialize
1215 * these members for applications.
1216 */
1217 ia->ia6_lifetime = ifra->ifra_lifetime;
1218 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1219 ia->ia6_lifetime.ia6t_expire =
1220 time_second + ia->ia6_lifetime.ia6t_vltime;
1221 } else
1222 ia->ia6_lifetime.ia6t_expire = 0;
1223 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1224 ia->ia6_lifetime.ia6t_preferred =
1225 time_second + ia->ia6_lifetime.ia6t_pltime;
1226 } else
1227 ia->ia6_lifetime.ia6t_preferred = 0;
1228
1229 /* reset the interface and routing table appropriately. */
1230 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1231 goto unlink;
1232
1233 /*
1234 * configure address flags.
1235 */
1236 ia->ia6_flags = ifra->ifra_flags;
1237 /*
1238 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1239 * userland, make it deprecated.
1240 */
1241 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1242 ia->ia6_lifetime.ia6t_pltime = 0;
1243 ia->ia6_lifetime.ia6t_preferred = time_second;
1244 }
1245 /*
1246 * Make the address tentative before joining multicast addresses,
1247 * so that corresponding MLD responses would not have a tentative
1248 * source address.
1249 */
1250 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1251 if (hostIsNew && in6if_do_dad(ifp))
1252 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1253
1254 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */
1255 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1256 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1257
1258 /*
1259 * We are done if we have simply modified an existing address.
1260 */
1261 if (!hostIsNew)
1262 return (error);
1263
1264 /*
1265 * Beyond this point, we should call in6_purgeaddr upon an error,
1266 * not just go to unlink.
1267 */
1268
1269 /* Join necessary multicast groups. */
1270 in6m_sol = NULL;
1271 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1272 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1273 if (error)
1274 goto cleanup;
1275 }
1276
1277 /*
1278 * Perform DAD, if needed.
1279 * XXX It may be of use, if we can administratively disable DAD.
1280 */
1281 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) &&
1282 (ia->ia6_flags & IN6_IFF_TENTATIVE))
1283 {
1284 int mindelay, maxdelay;
1285
1286 delay = 0;
1287 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1288 /*
1289 * We need to impose a delay before sending an NS
1290 * for DAD. Check if we also needed a delay for the
1291 * corresponding MLD message. If we did, the delay
1292 * should be larger than the MLD delay (this could be
1293 * relaxed a bit, but this simple logic is at least
1294 * safe).
1295 * XXX: Break data hiding guidelines and look at
1296 * state for the solicited multicast group.
1297 */
1298 mindelay = 0;
1299 if (in6m_sol != NULL &&
1300 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1301 mindelay = in6m_sol->in6m_timer;
1302 }
1303 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1304 if (maxdelay - mindelay == 0)
1305 delay = 0;
1306 else {
1307 delay =
1308 (arc4random() % (maxdelay - mindelay)) +
1309 mindelay;
1310 }
1311 }
1312 nd6_dad_start((struct ifaddr *)ia, delay);
1313 }
1314
1315 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew"));
1316 ifa_free(&ia->ia_ifa);
1317 return (error);
1318
1319 unlink:
1320 /*
1321 * XXX: if a change of an existing address failed, keep the entry
1322 * anyway.
1323 */
1324 if (hostIsNew) {
1325 in6_unlink_ifa(ia, ifp);
1326 ifa_free(&ia->ia_ifa);
1327 }
1328 return (error);
1329
1330 cleanup:
1331 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew"));
1332 ifa_free(&ia->ia_ifa);
1333 in6_purgeaddr(&ia->ia_ifa);
1334 return error;
1335}
1336
1337/*
1338 * Leave multicast groups. Factored out from in6_purgeaddr().
1339 * This entire work should only be done once, for the default FIB.
1340 */
1341static int
1342in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0)
1343{
1344 struct sockaddr_in6 mltaddr, mltmask;
1345 struct in6_multi_mship *imm;
1346 struct rtentry *rt;
1347 struct sockaddr_in6 sin6;
1348 int error;
1349
1350 /*
1351 * Leave from multicast groups we have joined for the interface.
1352 */
1353 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1354 LIST_REMOVE(imm, i6mm_chain);
1355 in6_leavegroup(imm);
1356 }
1357
1358 /*
1359 * Remove the link-local all-nodes address.
1360 */
1361 bzero(&mltmask, sizeof(mltmask));
1362 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1363 mltmask.sin6_family = AF_INET6;
1364 mltmask.sin6_addr = in6mask32;
1365
1366 bzero(&mltaddr, sizeof(mltaddr));
1367 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1368 mltaddr.sin6_family = AF_INET6;
1369 mltaddr.sin6_addr = in6addr_linklocal_allnodes;
1370
1371 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1372 return (error);
1373
1374 /*
1375 * As for the mltaddr above, proactively prepare the sin6 to avoid
1376 * rtentry un- and re-locking.
1377 */
1378 if (ifa0 != NULL) {
1379 bzero(&sin6, sizeof(sin6));
1380 sin6.sin6_len = sizeof(sin6);
1381 sin6.sin6_family = AF_INET6;
1382 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr,
1383 sizeof(sin6.sin6_addr));
1384 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL);
1385 if (error != 0)
1386 return (error);
1387 }
1388
1389 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1390 if (rt != NULL && rt->rt_gateway != NULL &&
1391 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1392 &ia->ia_addr.sin6_addr,
1393 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1394 /*
1395 * If no more IPv6 address exists on this interface then
1396 * remove the multicast address route.
1397 */
1398 if (ifa0 == NULL) {
1399 memcpy(&mltaddr.sin6_addr,
1400 &satosin6(rt_key(rt))->sin6_addr,
1401 sizeof(mltaddr.sin6_addr));
1402 RTFREE_LOCKED(rt);
1403 error = in6_rtrequest(RTM_DELETE,
1404 (struct sockaddr *)&mltaddr,
1405 (struct sockaddr *)&ia->ia_addr,
1406 (struct sockaddr *)&mltmask, RTF_UP,
1407 (struct rtentry **)0, RT_DEFAULT_FIB);
1408 if (error)
1409 log(LOG_INFO, "%s: link-local all-nodes "
1410 "multicast address deletion error\n",
1411 __func__);
1412 } else {
1413 /*
1414 * Replace the gateway of the route.
1415 */
1416 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1417 RTFREE_LOCKED(rt);
1418 }
1419 } else {
1420 if (rt != NULL)
1421 RTFREE_LOCKED(rt);
1422 }
1423
1424 /*
1425 * Remove the node-local all-nodes address.
1426 */
1427 mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
1428 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0)
1429 return (error);
1430
1431 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB);
1432 if (rt != NULL && rt->rt_gateway != NULL &&
1433 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr,
1434 &ia->ia_addr.sin6_addr,
1435 sizeof(ia->ia_addr.sin6_addr)) == 0)) {
1436 /*
1437 * If no more IPv6 address exists on this interface then
1438 * remove the multicast address route.
1439 */
1440 if (ifa0 == NULL) {
1441 memcpy(&mltaddr.sin6_addr,
1442 &satosin6(rt_key(rt))->sin6_addr,
1443 sizeof(mltaddr.sin6_addr));
1444
1445 RTFREE_LOCKED(rt);
1446 error = in6_rtrequest(RTM_DELETE,
1447 (struct sockaddr *)&mltaddr,
1448 (struct sockaddr *)&ia->ia_addr,
1449 (struct sockaddr *)&mltmask, RTF_UP,
1450 (struct rtentry **)0, RT_DEFAULT_FIB);
1451 if (error)
1452 log(LOG_INFO, "%s: node-local all-nodes"
1453 "multicast address deletion error\n",
1454 __func__);
1455 } else {
1456 /*
1457 * Replace the gateway of the route.
1458 */
1459 memcpy(rt->rt_gateway, &sin6, sizeof(sin6));
1460 RTFREE_LOCKED(rt);
1461 }
1462 } else {
1463 if (rt != NULL)
1464 RTFREE_LOCKED(rt);
1465 }
1466
1467 return (0);
1468}
1469
1470void
1471in6_purgeaddr(struct ifaddr *ifa)
1472{
1473 struct ifnet *ifp = ifa->ifa_ifp;
1474 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1475 int plen, error;
1476 struct ifaddr *ifa0;
1477
1478 if (ifa->ifa_carp)
1479 (*carp_detach_p)(ifa);
1480
1481 /*
1482 * find another IPv6 address as the gateway for the
1483 * link-local and node-local all-nodes multicast
1484 * address routes
1485 */
1486 IF_ADDR_RLOCK(ifp);
1487 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) {
1488 if ((ifa0->ifa_addr->sa_family != AF_INET6) ||
1489 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr,
1490 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0)
1491 continue;
1492 else
1493 break;
1494 }
1495 if (ifa0 != NULL)
1496 ifa_ref(ifa0);
1497 IF_ADDR_RUNLOCK(ifp);
1498
1499 /*
1500 * Remove the loopback route to the interface address.
1501 * The check for the current setting of "nd6_useloopback"
1502 * is not needed.
1503 */
1504 if (ia->ia_flags & IFA_RTSELF) {
1505 error = ifa_del_loopback_route((struct ifaddr *)ia,
1506 (struct sockaddr *)&ia->ia_addr);
1507 if (error == 0)
1508 ia->ia_flags &= ~IFA_RTSELF;
1509 }
1510
1511 /* stop DAD processing */
1512 nd6_dad_stop(ifa);
1513
1514 /* Remove local address entry from lltable. */
1515 in6_ifremloop(ifa);
1516
1517 /* Leave multicast groups. */
1518 error = in6_purgeaddr_mc(ifp, ia, ifa0);
1519
1520 if (ifa0 != NULL)
1521 ifa_free(ifa0);
1522
1523 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1524 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1525 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1526 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0);
1527 if (error != 0)
1528 log(LOG_INFO, "%s: err=%d, destination address delete "
1529 "failed\n", __func__, error);
1530 ia->ia_flags &= ~IFA_ROUTE;
1531 }
1532
1533 in6_unlink_ifa(ia, ifp);
1534}
1535
1536static void
1537in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1538{
1539
1540 IF_ADDR_WLOCK(ifp);
1541 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1542 IF_ADDR_WUNLOCK(ifp);
1543 ifa_free(&ia->ia_ifa); /* if_addrhead */
1544
1545 /*
1546 * Defer the release of what might be the last reference to the
1547 * in6_ifaddr so that it can't be freed before the remainder of the
1548 * cleanup.
1549 */
1550 IN6_IFADDR_WLOCK();
1551 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link);
1552 LIST_REMOVE(ia, ia6_hash);
1553 IN6_IFADDR_WUNLOCK();
1554
1555 /*
1556 * Release the reference to the base prefix. There should be a
1557 * positive reference.
1558 */
1559 if (ia->ia6_ndpr == NULL) {
1560 nd6log((LOG_NOTICE,
1561 "in6_unlink_ifa: autoconf'ed address "
1562 "%p has no prefix\n", ia));
1563 } else {
1564 ia->ia6_ndpr->ndpr_refcnt--;
1565 ia->ia6_ndpr = NULL;
1566 }
1567
1568 /*
1569 * Also, if the address being removed is autoconf'ed, call
1570 * pfxlist_onlink_check() since the release might affect the status of
1571 * other (detached) addresses.
1572 */
1573 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1574 pfxlist_onlink_check();
1575 }
1576 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1577}
1578
1579void
1580in6_purgeif(struct ifnet *ifp)
1581{
1582 struct ifaddr *ifa, *nifa;
1583
1584 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) {
1585 if (ifa->ifa_addr->sa_family != AF_INET6)
1586 continue;
1587 in6_purgeaddr(ifa);
1588 }
1589
1590 in6_ifdetach(ifp);
1591}
1592
1593/*
1594 * SIOC[GAD]LIFADDR.
1595 * SIOCGLIFADDR: get first address. (?)
1596 * SIOCGLIFADDR with IFLR_PREFIX:
1597 * get first address that matches the specified prefix.
1598 * SIOCALIFADDR: add the specified address.
1599 * SIOCALIFADDR with IFLR_PREFIX:
1600 * add the specified prefix, filling hostid part from
1601 * the first link-local address. prefixlen must be <= 64.
1602 * SIOCDLIFADDR: delete the specified address.
1603 * SIOCDLIFADDR with IFLR_PREFIX:
1604 * delete the first address that matches the specified prefix.
1605 * return values:
1606 * EINVAL on invalid parameters
1607 * EADDRNOTAVAIL on prefix match failed/specified address not found
1608 * other values may be returned from in6_ioctl()
1609 *
1610 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1611 * this is to accomodate address naming scheme other than RFC2374,
1612 * in the future.
1613 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1614 * address encoding scheme. (see figure on page 8)
1615 */
1616static int
1617in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data,
1618 struct ifnet *ifp, struct thread *td)
1619{
1620 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1621 struct ifaddr *ifa;
1622 struct sockaddr *sa;
1623
1624 /* sanity checks */
1625 if (!data || !ifp) {
1626 panic("invalid argument to in6_lifaddr_ioctl");
1627 /* NOTREACHED */
1628 }
1629
1630 switch (cmd) {
1631 case SIOCGLIFADDR:
1632 /* address must be specified on GET with IFLR_PREFIX */
1633 if ((iflr->flags & IFLR_PREFIX) == 0)
1634 break;
1635 /* FALLTHROUGH */
1636 case SIOCALIFADDR:
1637 case SIOCDLIFADDR:
1638 /* address must be specified on ADD and DELETE */
1639 sa = (struct sockaddr *)&iflr->addr;
1640 if (sa->sa_family != AF_INET6)
1641 return EINVAL;
1642 if (sa->sa_len != sizeof(struct sockaddr_in6))
1643 return EINVAL;
1644 /* XXX need improvement */
1645 sa = (struct sockaddr *)&iflr->dstaddr;
1646 if (sa->sa_family && sa->sa_family != AF_INET6)
1647 return EINVAL;
1648 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1649 return EINVAL;
1650 break;
1651 default: /* shouldn't happen */
1652#if 0
1653 panic("invalid cmd to in6_lifaddr_ioctl");
1654 /* NOTREACHED */
1655#else
1656 return EOPNOTSUPP;
1657#endif
1658 }
1659 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1660 return EINVAL;
1661
1662 switch (cmd) {
1663 case SIOCALIFADDR:
1664 {
1665 struct in6_aliasreq ifra;
1666 struct in6_addr *hostid = NULL;
1667 int prefixlen;
1668
1669 ifa = NULL;
1670 if ((iflr->flags & IFLR_PREFIX) != 0) {
1671 struct sockaddr_in6 *sin6;
1672
1673 /*
1674 * hostid is to fill in the hostid part of the
1675 * address. hostid points to the first link-local
1676 * address attached to the interface.
1677 */
1678 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1679 if (!ifa)
1680 return EADDRNOTAVAIL;
1681 hostid = IFA_IN6(ifa);
1682
1683 /* prefixlen must be <= 64. */
1684 if (64 < iflr->prefixlen) {
1685 if (ifa != NULL)
1686 ifa_free(ifa);
1687 return EINVAL;
1688 }
1689 prefixlen = iflr->prefixlen;
1690
1691 /* hostid part must be zero. */
1692 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1693 if (sin6->sin6_addr.s6_addr32[2] != 0 ||
1694 sin6->sin6_addr.s6_addr32[3] != 0) {
1695 if (ifa != NULL)
1696 ifa_free(ifa);
1697 return EINVAL;
1698 }
1699 } else
1700 prefixlen = iflr->prefixlen;
1701
1702 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1703 bzero(&ifra, sizeof(ifra));
1704 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name));
1705
1706 bcopy(&iflr->addr, &ifra.ifra_addr,
1707 ((struct sockaddr *)&iflr->addr)->sa_len);
1708 if (hostid) {
1709 /* fill in hostid part */
1710 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1711 hostid->s6_addr32[2];
1712 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1713 hostid->s6_addr32[3];
1714 }
1715
1716 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */
1717 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1718 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1719 if (hostid) {
1720 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1721 hostid->s6_addr32[2];
1722 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1723 hostid->s6_addr32[3];
1724 }
1725 }
1726 if (ifa != NULL)
1727 ifa_free(ifa);
1728
1729 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1730 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1731
1732 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1733 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td);
1734 }
1735 case SIOCGLIFADDR:
1736 case SIOCDLIFADDR:
1737 {
1738 struct in6_ifaddr *ia;
1739 struct in6_addr mask, candidate, match;
1740 struct sockaddr_in6 *sin6;
1741 int cmp;
1742
1743 bzero(&mask, sizeof(mask));
1744 if (iflr->flags & IFLR_PREFIX) {
1745 /* lookup a prefix rather than address. */
1746 in6_prefixlen2mask(&mask, iflr->prefixlen);
1747
1748 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1749 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1750 match.s6_addr32[0] &= mask.s6_addr32[0];
1751 match.s6_addr32[1] &= mask.s6_addr32[1];
1752 match.s6_addr32[2] &= mask.s6_addr32[2];
1753 match.s6_addr32[3] &= mask.s6_addr32[3];
1754
1755 /* if you set extra bits, that's wrong */
1756 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1757 return EINVAL;
1758
1759 cmp = 1;
1760 } else {
1761 if (cmd == SIOCGLIFADDR) {
1762 /* on getting an address, take the 1st match */
1763 cmp = 0; /* XXX */
1764 } else {
1765 /* on deleting an address, do exact match */
1766 in6_prefixlen2mask(&mask, 128);
1767 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1768 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1769
1770 cmp = 1;
1771 }
1772 }
1773
1774 IF_ADDR_RLOCK(ifp);
1775 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1776 if (ifa->ifa_addr->sa_family != AF_INET6)
1777 continue;
1778 if (!cmp)
1779 break;
1780
1781 /*
1782 * XXX: this is adhoc, but is necessary to allow
1783 * a user to specify fe80::/64 (not /10) for a
1784 * link-local address.
1785 */
1786 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1787 in6_clearscope(&candidate);
1788 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1789 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1790 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1791 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1792 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1793 break;
1794 }
1795 if (ifa != NULL)
1796 ifa_ref(ifa);
1797 IF_ADDR_RUNLOCK(ifp);
1798 if (!ifa)
1799 return EADDRNOTAVAIL;
1800 ia = ifa2ia6(ifa);
1801
1802 if (cmd == SIOCGLIFADDR) {
1803 int error;
1804
1805 /* fill in the if_laddrreq structure */
1806 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1807 error = sa6_recoverscope(
1808 (struct sockaddr_in6 *)&iflr->addr);
1809 if (error != 0) {
1810 ifa_free(ifa);
1811 return (error);
1812 }
1813
1814 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1815 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1816 ia->ia_dstaddr.sin6_len);
1817 error = sa6_recoverscope(
1818 (struct sockaddr_in6 *)&iflr->dstaddr);
1819 if (error != 0) {
1820 ifa_free(ifa);
1821 return (error);
1822 }
1823 } else
1824 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1825
1826 iflr->prefixlen =
1827 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
1828
1829 iflr->flags = ia->ia6_flags; /* XXX */
1830 ifa_free(ifa);
1831
1832 return 0;
1833 } else {
1834 struct in6_aliasreq ifra;
1835
1836 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1837 bzero(&ifra, sizeof(ifra));
1838 bcopy(iflr->iflr_name, ifra.ifra_name,
1839 sizeof(ifra.ifra_name));
1840
1841 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1842 ia->ia_addr.sin6_len);
1843 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
1844 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1845 ia->ia_dstaddr.sin6_len);
1846 } else {
1847 bzero(&ifra.ifra_dstaddr,
1848 sizeof(ifra.ifra_dstaddr));
1849 }
1850 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1851 ia->ia_prefixmask.sin6_len);
1852
1853 ifra.ifra_flags = ia->ia6_flags;
1854 ifa_free(ifa);
1855 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
1856 ifp, td);
1857 }
1858 }
1859 }
1860
1861 return EOPNOTSUPP; /* just for safety */
1862}
1863
1864/*
1865 * Initialize an interface's IPv6 address and routing table entry.
1866 */
1867static int
1868in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
1869 struct sockaddr_in6 *sin6, int newhost)
1870{
1871 int error = 0, plen, ifacount = 0;
1872 struct ifaddr *ifa;
1873
1874 /*
1875 * Give the interface a chance to initialize
1876 * if this is its first address,
1877 * and to validate the address if necessary.
1878 */
1879 IF_ADDR_RLOCK(ifp);
1880 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1881 if (ifa->ifa_addr->sa_family != AF_INET6)
1882 continue;
1883 ifacount++;
1884 }
1885 IF_ADDR_RUNLOCK(ifp);
1886
1887 ia->ia_addr = *sin6;
1888
1889 if (ifacount <= 1 && ifp->if_ioctl) {
1890 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1891 if (error)
1892 return (error);
1893 }
1894
1895 ia->ia_ifa.ifa_metric = ifp->if_metric;
1896
1897 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1898
1899 /*
1900 * Special case:
1901 * If a new destination address is specified for a point-to-point
1902 * interface, install a route to the destination as an interface
1903 * direct route.
1904 * XXX: the logic below rejects assigning multiple addresses on a p2p
1905 * interface that share the same destination.
1906 */
1907 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1908 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1909 ia->ia_dstaddr.sin6_family == AF_INET6) {
1910 int rtflags = RTF_UP | RTF_HOST;
1911 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1912 if (error)
1913 return (error);
1914 ia->ia_flags |= IFA_ROUTE;
1915 /*
1916 * Handle the case for ::1 .
1917 */
1918 if (ifp->if_flags & IFF_LOOPBACK)
1919 ia->ia_flags |= IFA_RTSELF;
1920 }
1921
1922 /*
1923 * add a loopback route to self
1924 */
1925 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1926 error = ifa_add_loopback_route((struct ifaddr *)ia,
1927 (struct sockaddr *)&ia->ia_addr);
1928 if (error == 0)
1929 ia->ia_flags |= IFA_RTSELF;
1930 }
1931
1932 /* Add local address to lltable, if necessary (ex. on p2p link). */
1933 if (newhost)
1934 in6_ifaddloop(&(ia->ia_ifa));
1935
1936 return (error);
1937}
1938
1939/*
1940 * Find an IPv6 interface link-local address specific to an interface.
1941 * ifaddr is returned referenced.
1942 */
1943struct in6_ifaddr *
1944in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1945{
1946 struct ifaddr *ifa;
1947
1948 IF_ADDR_RLOCK(ifp);
1949 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1950 if (ifa->ifa_addr->sa_family != AF_INET6)
1951 continue;
1952 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1953 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1954 ignoreflags) != 0)
1955 continue;
1956 ifa_ref(ifa);
1957 break;
1958 }
1959 }
1960 IF_ADDR_RUNLOCK(ifp);
1961
1962 return ((struct in6_ifaddr *)ifa);
1963}
1964
1965
1966/*
1967 * find the internet address corresponding to a given interface and address.
1968 * ifaddr is returned referenced.
1969 */
1970struct in6_ifaddr *
1971in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1972{
1973 struct ifaddr *ifa;
1974
1975 IF_ADDR_RLOCK(ifp);
1976 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1977 if (ifa->ifa_addr->sa_family != AF_INET6)
1978 continue;
1979 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1980 ifa_ref(ifa);
1981 break;
1982 }
1983 }
1984 IF_ADDR_RUNLOCK(ifp);
1985
1986 return ((struct in6_ifaddr *)ifa);
1987}
1988
1989/*
|
1990 * Convert IP6 address to printable (loggable) representation. Caller
1991 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1992 */
1993static char digits[] = "0123456789abcdef";
1994char *
1995ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1996{
1997 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1998 char *cp;
1999 const u_int16_t *a = (const u_int16_t *)addr;
2000 const u_int8_t *d;
2001 int dcolon = 0, zero = 0;
2002
2003 cp = ip6buf;
2004
2005 for (i = 0; i < 8; i++) {
2006 if (*(a + i) == 0) {
2007 cnt++;
2008 if (cnt == 1)
2009 idx = i;
2010 }
2011 else if (maxcnt < cnt) {
2012 maxcnt = cnt;
2013 index = idx;
2014 cnt = 0;
2015 }
2016 }
2017 if (maxcnt < cnt) {
2018 maxcnt = cnt;
2019 index = idx;
2020 }
2021
2022 for (i = 0; i < 8; i++) {
2023 if (dcolon == 1) {
2024 if (*a == 0) {
2025 if (i == 7)
2026 *cp++ = ':';
2027 a++;
2028 continue;
2029 } else
2030 dcolon = 2;
2031 }
2032 if (*a == 0) {
2033 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
2034 if (i == 0)
2035 *cp++ = ':';
2036 *cp++ = ':';
2037 dcolon = 1;
2038 } else {
2039 *cp++ = '0';
2040 *cp++ = ':';
2041 }
2042 a++;
2043 continue;
2044 }
2045 d = (const u_char *)a;
2046 /* Try to eliminate leading zeros in printout like in :0001. */
2047 zero = 1;
2048 *cp = digits[*d >> 4];
2049 if (*cp != '0') {
2050 zero = 0;
2051 cp++;
2052 }
2053 *cp = digits[*d++ & 0xf];
2054 if (zero == 0 || (*cp != '0')) {
2055 zero = 0;
2056 cp++;
2057 }
2058 *cp = digits[*d >> 4];
2059 if (zero == 0 || (*cp != '0')) {
2060 zero = 0;
2061 cp++;
2062 }
2063 *cp++ = digits[*d & 0xf];
2064 *cp++ = ':';
2065 a++;
2066 }
2067 *--cp = '\0';
2068 return (ip6buf);
2069}
2070
2071int
2072in6_localaddr(struct in6_addr *in6)
2073{
2074 struct in6_ifaddr *ia;
2075
2076 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
2077 return 1;
2078
2079 IN6_IFADDR_RLOCK();
2080 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2081 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
2082 &ia->ia_prefixmask.sin6_addr)) {
2083 IN6_IFADDR_RUNLOCK();
2084 return 1;
2085 }
2086 }
2087 IN6_IFADDR_RUNLOCK();
2088
2089 return (0);
2090}
2091
2092/*
2093 * Return 1 if an internet address is for the local host and configured
2094 * on one of its interfaces.
2095 */
2096int
2097in6_localip(struct in6_addr *in6)
2098{
2099 struct in6_ifaddr *ia;
2100
2101 IN6_IFADDR_RLOCK();
2102 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
2103 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
2104 IN6_IFADDR_RUNLOCK();
2105 return (1);
2106 }
2107 }
2108 IN6_IFADDR_RUNLOCK();
2109 return (0);
2110}
2111
2112int
2113in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
2114{
2115 struct in6_ifaddr *ia;
2116
2117 IN6_IFADDR_RLOCK();
2118 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
2119 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
2120 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
2121 IN6_IFADDR_RUNLOCK();
2122 return (1); /* true */
2123 }
2124 break;
2125 }
2126 }
2127 IN6_IFADDR_RUNLOCK();
2128
2129 return (0); /* false */
2130}
2131
2132/*
2133 * return length of part which dst and src are equal
2134 * hard coding...
2135 */
2136int
2137in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
2138{
2139 int match = 0;
2140 u_char *s = (u_char *)src, *d = (u_char *)dst;
2141 u_char *lim = s + 16, r;
2142
2143 while (s < lim)
2144 if ((r = (*d++ ^ *s++)) != 0) {
2145 while (r < 128) {
2146 match++;
2147 r <<= 1;
2148 }
2149 break;
2150 } else
2151 match += 8;
2152 return match;
2153}
2154
2155/* XXX: to be scope conscious */
2156int
2157in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
2158{
2159 int bytelen, bitlen;
2160
2161 /* sanity check */
2162 if (0 > len || len > 128) {
2163 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
2164 len);
2165 return (0);
2166 }
2167
2168 bytelen = len / 8;
2169 bitlen = len % 8;
2170
2171 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
2172 return (0);
2173 if (bitlen != 0 &&
2174 p1->s6_addr[bytelen] >> (8 - bitlen) !=
2175 p2->s6_addr[bytelen] >> (8 - bitlen))
2176 return (0);
2177
2178 return (1);
2179}
2180
2181void
2182in6_prefixlen2mask(struct in6_addr *maskp, int len)
2183{
2184 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
2185 int bytelen, bitlen, i;
2186
2187 /* sanity check */
2188 if (0 > len || len > 128) {
2189 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2190 len);
2191 return;
2192 }
2193
2194 bzero(maskp, sizeof(*maskp));
2195 bytelen = len / 8;
2196 bitlen = len % 8;
2197 for (i = 0; i < bytelen; i++)
2198 maskp->s6_addr[i] = 0xff;
2199 if (bitlen)
2200 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2201}
2202
2203/*
2204 * return the best address out of the same scope. if no address was
2205 * found, return the first valid address from designated IF.
2206 */
2207struct in6_ifaddr *
2208in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2209{
2210 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2211 struct ifaddr *ifa;
2212 struct in6_ifaddr *besta = 0;
2213 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2214
2215 dep[0] = dep[1] = NULL;
2216
2217 /*
2218 * We first look for addresses in the same scope.
2219 * If there is one, return it.
2220 * If two or more, return one which matches the dst longest.
2221 * If none, return one of global addresses assigned other ifs.
2222 */
2223 IF_ADDR_RLOCK(ifp);
2224 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2225 if (ifa->ifa_addr->sa_family != AF_INET6)
2226 continue;
2227 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2228 continue; /* XXX: is there any case to allow anycast? */
2229 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2230 continue; /* don't use this interface */
2231 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2232 continue;
2233 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2234 if (V_ip6_use_deprecated)
2235 dep[0] = (struct in6_ifaddr *)ifa;
2236 continue;
2237 }
2238
2239 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2240 /*
2241 * call in6_matchlen() as few as possible
2242 */
2243 if (besta) {
2244 if (blen == -1)
2245 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2246 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2247 if (tlen > blen) {
2248 blen = tlen;
2249 besta = (struct in6_ifaddr *)ifa;
2250 }
2251 } else
2252 besta = (struct in6_ifaddr *)ifa;
2253 }
2254 }
2255 if (besta) {
2256 ifa_ref(&besta->ia_ifa);
2257 IF_ADDR_RUNLOCK(ifp);
2258 return (besta);
2259 }
2260
2261 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2262 if (ifa->ifa_addr->sa_family != AF_INET6)
2263 continue;
2264 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2265 continue; /* XXX: is there any case to allow anycast? */
2266 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2267 continue; /* don't use this interface */
2268 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2269 continue;
2270 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2271 if (V_ip6_use_deprecated)
2272 dep[1] = (struct in6_ifaddr *)ifa;
2273 continue;
2274 }
2275
2276 if (ifa != NULL)
2277 ifa_ref(ifa);
2278 IF_ADDR_RUNLOCK(ifp);
2279 return (struct in6_ifaddr *)ifa;
2280 }
2281
2282 /* use the last-resort values, that are, deprecated addresses */
2283 if (dep[0]) {
2284 ifa_ref((struct ifaddr *)dep[0]);
2285 IF_ADDR_RUNLOCK(ifp);
2286 return dep[0];
2287 }
2288 if (dep[1]) {
2289 ifa_ref((struct ifaddr *)dep[1]);
2290 IF_ADDR_RUNLOCK(ifp);
2291 return dep[1];
2292 }
2293
2294 IF_ADDR_RUNLOCK(ifp);
2295 return NULL;
2296}
2297
2298/*
2299 * perform DAD when interface becomes IFF_UP.
2300 */
2301void
2302in6_if_up(struct ifnet *ifp)
2303{
2304 struct ifaddr *ifa;
2305 struct in6_ifaddr *ia;
2306
2307 IF_ADDR_RLOCK(ifp);
2308 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2309 if (ifa->ifa_addr->sa_family != AF_INET6)
2310 continue;
2311 ia = (struct in6_ifaddr *)ifa;
2312 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2313 /*
2314 * The TENTATIVE flag was likely set by hand
2315 * beforehand, implicitly indicating the need for DAD.
2316 * We may be able to skip the random delay in this
2317 * case, but we impose delays just in case.
2318 */
2319 nd6_dad_start(ifa,
2320 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2321 }
2322 }
2323 IF_ADDR_RUNLOCK(ifp);
2324
2325 /*
2326 * special cases, like 6to4, are handled in in6_ifattach
2327 */
2328 in6_ifattach(ifp, NULL);
2329}
2330
2331int
2332in6if_do_dad(struct ifnet *ifp)
2333{
2334 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2335 return (0);
2336
2337 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
2338 return (0);
2339
2340 switch (ifp->if_type) {
2341#ifdef IFT_DUMMY
2342 case IFT_DUMMY:
2343#endif
2344 case IFT_FAITH:
2345 /*
2346 * These interfaces do not have the IFF_LOOPBACK flag,
2347 * but loop packets back. We do not have to do DAD on such
2348 * interfaces. We should even omit it, because loop-backed
2349 * NS would confuse the DAD procedure.
2350 */
2351 return (0);
2352 default:
2353 /*
2354 * Our DAD routine requires the interface up and running.
2355 * However, some interfaces can be up before the RUNNING
2356 * status. Additionaly, users may try to assign addresses
2357 * before the interface becomes up (or running).
2358 * We simply skip DAD in such a case as a work around.
2359 * XXX: we should rather mark "tentative" on such addresses,
2360 * and do DAD after the interface becomes ready.
2361 */
2362 if (!((ifp->if_flags & IFF_UP) &&
2363 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
2364 return (0);
2365
2366 return (1);
2367 }
2368}
2369
2370/*
2371 * Calculate max IPv6 MTU through all the interfaces and store it
2372 * to in6_maxmtu.
2373 */
2374void
2375in6_setmaxmtu(void)
2376{
2377 unsigned long maxmtu = 0;
2378 struct ifnet *ifp;
2379
2380 IFNET_RLOCK_NOSLEEP();
2381 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
2382 /* this function can be called during ifnet initialization */
2383 if (!ifp->if_afdata[AF_INET6])
2384 continue;
2385 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2386 IN6_LINKMTU(ifp) > maxmtu)
2387 maxmtu = IN6_LINKMTU(ifp);
2388 }
2389 IFNET_RUNLOCK_NOSLEEP();
2390 if (maxmtu) /* update only when maxmtu is positive */
2391 V_in6_maxmtu = maxmtu;
2392}
2393
2394/*
2395 * Provide the length of interface identifiers to be used for the link attached
2396 * to the given interface. The length should be defined in "IPv6 over
2397 * xxx-link" document. Note that address architecture might also define
2398 * the length for a particular set of address prefixes, regardless of the
2399 * link type. As clarified in rfc2462bis, those two definitions should be
2400 * consistent, and those really are as of August 2004.
2401 */
2402int
2403in6_if2idlen(struct ifnet *ifp)
2404{
2405 switch (ifp->if_type) {
2406 case IFT_ETHER: /* RFC2464 */
2407#ifdef IFT_PROPVIRTUAL
2408 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2409#endif
2410#ifdef IFT_L2VLAN
2411 case IFT_L2VLAN: /* ditto */
2412#endif
2413#ifdef IFT_IEEE80211
2414 case IFT_IEEE80211: /* ditto */
2415#endif
2416#ifdef IFT_MIP
2417 case IFT_MIP: /* ditto */
2418#endif
2419 case IFT_INFINIBAND:
2420 return (64);
2421 case IFT_FDDI: /* RFC2467 */
2422 return (64);
2423 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2424 return (64);
2425 case IFT_PPP: /* RFC2472 */
2426 return (64);
2427 case IFT_ARCNET: /* RFC2497 */
2428 return (64);
2429 case IFT_FRELAY: /* RFC2590 */
2430 return (64);
2431 case IFT_IEEE1394: /* RFC3146 */
2432 return (64);
2433 case IFT_GIF:
2434 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2435 case IFT_LOOP:
2436 return (64); /* XXX: is this really correct? */
2437 default:
2438 /*
2439 * Unknown link type:
2440 * It might be controversial to use the today's common constant
2441 * of 64 for these cases unconditionally. For full compliance,
2442 * we should return an error in this case. On the other hand,
2443 * if we simply miss the standard for the link type or a new
2444 * standard is defined for a new link type, the IFID length
2445 * is very likely to be the common constant. As a compromise,
2446 * we always use the constant, but make an explicit notice
2447 * indicating the "unknown" case.
2448 */
2449 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2450 return (64);
2451 }
2452}
2453
2454#include <sys/sysctl.h>
2455
2456struct in6_llentry {
2457 struct llentry base;
2458 struct sockaddr_in6 l3_addr6;
2459};
2460
2461/*
2462 * Deletes an address from the address table.
2463 * This function is called by the timer functions
2464 * such as arptimer() and nd6_llinfo_timer(), and
2465 * the caller does the locking.
2466 */
2467static void
2468in6_lltable_free(struct lltable *llt, struct llentry *lle)
2469{
2470 LLE_WUNLOCK(lle);
2471 LLE_LOCK_DESTROY(lle);
2472 free(lle, M_LLTABLE);
2473}
2474
2475static struct llentry *
2476in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
2477{
2478 struct in6_llentry *lle;
2479
2480 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2481 if (lle == NULL) /* NB: caller generates msg */
2482 return NULL;
2483
2484 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
2485 lle->base.lle_refcnt = 1;
2486 lle->base.lle_free = in6_lltable_free;
2487 LLE_LOCK_INIT(&lle->base);
2488 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock,
2489 CALLOUT_RETURNUNLOCKED);
2490
2491 return (&lle->base);
2492}
2493
2494static void
2495in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix,
2496 const struct sockaddr *mask, u_int flags)
2497{
2498 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2499 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2500 struct llentry *lle, *next;
2501 int i;
2502
2503 /*
2504 * (flags & LLE_STATIC) means deleting all entries
2505 * including static ND6 entries.
2506 */
2507 IF_AFDATA_WLOCK(llt->llt_ifp);
2508 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2509 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) {
2510 if (IN6_ARE_MASKED_ADDR_EQUAL(
2511 &satosin6(L3_ADDR(lle))->sin6_addr,
2512 &pfx->sin6_addr, &msk->sin6_addr) &&
2513 ((flags & LLE_STATIC) ||
2514 !(lle->la_flags & LLE_STATIC))) {
2515 LLE_WLOCK(lle);
2516 if (callout_stop(&lle->la_timer))
2517 LLE_REMREF(lle);
2518 llentry_free(lle);
2519 }
2520 }
2521 }
2522 IF_AFDATA_WUNLOCK(llt->llt_ifp);
2523}
2524
2525static int
2526in6_lltable_rtcheck(struct ifnet *ifp,
2527 u_int flags,
2528 const struct sockaddr *l3addr)
2529{
2530 struct rtentry *rt;
2531 char ip6buf[INET6_ADDRSTRLEN];
2532
2533 KASSERT(l3addr->sa_family == AF_INET6,
2534 ("sin_family %d", l3addr->sa_family));
2535
2536 /* Our local addresses are always only installed on the default FIB. */
2537 /* XXX rtalloc1 should take a const param */
2538 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0,
2539 RT_DEFAULT_FIB);
2540 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2541 struct ifaddr *ifa;
2542 /*
2543 * Create an ND6 cache for an IPv6 neighbor
2544 * that is not covered by our own prefix.
2545 */
2546 /* XXX ifaof_ifpforaddr should take a const param */
2547 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2548 if (ifa != NULL) {
2549 ifa_free(ifa);
2550 if (rt != NULL)
2551 RTFREE_LOCKED(rt);
2552 return 0;
2553 }
2554 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2555 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2556 if (rt != NULL)
2557 RTFREE_LOCKED(rt);
2558 return EINVAL;
2559 }
2560 RTFREE_LOCKED(rt);
2561 return 0;
2562}
2563
2564static struct llentry *
2565in6_lltable_lookup(struct lltable *llt, u_int flags,
2566 const struct sockaddr *l3addr)
2567{
2568 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2569 struct ifnet *ifp = llt->llt_ifp;
2570 struct llentry *lle;
2571 struct llentries *lleh;
2572 u_int hashkey;
2573
2574 IF_AFDATA_LOCK_ASSERT(ifp);
2575 KASSERT(l3addr->sa_family == AF_INET6,
2576 ("sin_family %d", l3addr->sa_family));
2577
2578 hashkey = sin6->sin6_addr.s6_addr32[3];
2579 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)];
2580 LIST_FOREACH(lle, lleh, lle_next) {
2581 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle);
2582 if (lle->la_flags & LLE_DELETED)
2583 continue;
2584 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr,
2585 sizeof(struct in6_addr)) == 0)
2586 break;
2587 }
2588
2589 if (lle == NULL) {
2590 if (!(flags & LLE_CREATE))
2591 return (NULL);
2592 /*
2593 * A route that covers the given address must have
2594 * been installed 1st because we are doing a resolution,
2595 * verify this.
2596 */
2597 if (!(flags & LLE_IFADDR) &&
2598 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2599 return NULL;
2600
2601 lle = in6_lltable_new(l3addr, flags);
2602 if (lle == NULL) {
2603 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2604 return NULL;
2605 }
2606 lle->la_flags = flags & ~LLE_CREATE;
2607 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) {
2608 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2609 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2610 }
2611
2612 lle->lle_tbl = llt;
2613 lle->lle_head = lleh;
2614 lle->la_flags |= LLE_LINKED;
2615 LIST_INSERT_HEAD(lleh, lle, lle_next);
2616 } else if (flags & LLE_DELETE) {
2617 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2618 LLE_WLOCK(lle);
2619 lle->la_flags |= LLE_DELETED;
2620#ifdef DIAGNOSTIC
2621 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2622#endif
2623 if ((lle->la_flags &
2624 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC)
2625 llentry_free(lle);
2626 else
2627 LLE_WUNLOCK(lle);
2628 }
2629 lle = (void *)-1;
2630 }
2631 if (LLE_IS_VALID(lle)) {
2632 if (flags & LLE_EXCLUSIVE)
2633 LLE_WLOCK(lle);
2634 else
2635 LLE_RLOCK(lle);
2636 }
2637 return (lle);
2638}
2639
2640static int
2641in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr)
2642{
2643 struct ifnet *ifp = llt->llt_ifp;
2644 struct llentry *lle;
2645 /* XXX stack use */
2646 struct {
2647 struct rt_msghdr rtm;
2648 struct sockaddr_in6 sin6;
2649 /*
2650 * ndp.c assumes that sdl is word aligned
2651 */
2652#ifdef __LP64__
2653 uint32_t pad;
2654#endif
2655 struct sockaddr_dl sdl;
2656 } ndpc;
2657 int i, error;
2658
2659 if (ifp->if_flags & IFF_LOOPBACK)
2660 return 0;
2661
2662 LLTABLE_LOCK_ASSERT();
2663
2664 error = 0;
2665 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2666 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
2667 struct sockaddr_dl *sdl;
2668
2669 /* skip deleted or invalid entries */
2670 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2671 continue;
2672 /* Skip if jailed and not a valid IP of the prison. */
2673 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0)
2674 continue;
2675 /*
2676 * produce a msg made of:
2677 * struct rt_msghdr;
2678 * struct sockaddr_in6 (IPv6)
2679 * struct sockaddr_dl;
2680 */
2681 bzero(&ndpc, sizeof(ndpc));
2682 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2683 ndpc.rtm.rtm_version = RTM_VERSION;
2684 ndpc.rtm.rtm_type = RTM_GET;
2685 ndpc.rtm.rtm_flags = RTF_UP;
2686 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2687 ndpc.sin6.sin6_family = AF_INET6;
2688 ndpc.sin6.sin6_len = sizeof(ndpc.sin6);
2689 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle));
2690 if (V_deembed_scopeid)
2691 sa6_recoverscope(&ndpc.sin6);
2692
2693 /* publish */
2694 if (lle->la_flags & LLE_PUB)
2695 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2696
2697 sdl = &ndpc.sdl;
2698 sdl->sdl_family = AF_LINK;
2699 sdl->sdl_len = sizeof(*sdl);
2700 sdl->sdl_alen = ifp->if_addrlen;
2701 sdl->sdl_index = ifp->if_index;
2702 sdl->sdl_type = ifp->if_type;
2703 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2704 ndpc.rtm.rtm_rmx.rmx_expire =
2705 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2706 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2707 if (lle->la_flags & LLE_STATIC)
2708 ndpc.rtm.rtm_flags |= RTF_STATIC;
2709 ndpc.rtm.rtm_index = ifp->if_index;
2710 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2711 if (error)
2712 break;
2713 }
2714 }
2715 return error;
2716}
2717
2718void *
2719in6_domifattach(struct ifnet *ifp)
2720{
2721 struct in6_ifextra *ext;
2722
2723 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2724 bzero(ext, sizeof(*ext));
2725
2726 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat),
2727 M_IFADDR, M_WAITOK);
2728 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2729
2730 ext->icmp6_ifstat =
2731 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat),
2732 M_IFADDR, M_WAITOK);
2733 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2734
2735 ext->nd_ifinfo = nd6_ifattach(ifp);
2736 ext->scope6_id = scope6_ifattach(ifp);
2737 ext->lltable = lltable_init(ifp, AF_INET6);
2738 if (ext->lltable != NULL) {
2739 ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
2740 ext->lltable->llt_lookup = in6_lltable_lookup;
2741 ext->lltable->llt_dump = in6_lltable_dump;
2742 }
2743
2744 ext->mld_ifinfo = mld_domifattach(ifp);
2745
2746 return ext;
2747}
2748
2749void
2750in6_domifdetach(struct ifnet *ifp, void *aux)
2751{
2752 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2753
2754 mld_domifdetach(ifp);
2755 scope6_ifdetach(ext->scope6_id);
2756 nd6_ifdetach(ext->nd_ifinfo);
2757 lltable_free(ext->lltable);
2758 free(ext->in6_ifstat, M_IFADDR);
2759 free(ext->icmp6_ifstat, M_IFADDR);
2760 free(ext, M_IFADDR);
2761}
2762
2763/*
2764 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2765 * v4 mapped addr or v4 compat addr
2766 */
2767void
2768in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2769{
2770
2771 bzero(sin, sizeof(*sin));
2772 sin->sin_len = sizeof(struct sockaddr_in);
2773 sin->sin_family = AF_INET;
2774 sin->sin_port = sin6->sin6_port;
2775 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2776}
2777
2778/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2779void
2780in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2781{
2782 bzero(sin6, sizeof(*sin6));
2783 sin6->sin6_len = sizeof(struct sockaddr_in6);
2784 sin6->sin6_family = AF_INET6;
2785 sin6->sin6_port = sin->sin_port;
2786 sin6->sin6_addr.s6_addr32[0] = 0;
2787 sin6->sin6_addr.s6_addr32[1] = 0;
2788 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2789 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2790}
2791
2792/* Convert sockaddr_in6 into sockaddr_in. */
2793void
2794in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2795{
2796 struct sockaddr_in *sin_p;
2797 struct sockaddr_in6 sin6;
2798
2799 /*
2800 * Save original sockaddr_in6 addr and convert it
2801 * to sockaddr_in.
2802 */
2803 sin6 = *(struct sockaddr_in6 *)nam;
2804 sin_p = (struct sockaddr_in *)nam;
2805 in6_sin6_2_sin(sin_p, &sin6);
2806}
2807
2808/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2809void
2810in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2811{
2812 struct sockaddr_in *sin_p;
2813 struct sockaddr_in6 *sin6_p;
2814
2815 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2816 sin_p = (struct sockaddr_in *)*nam;
2817 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2818 free(*nam, M_SONAME);
2819 *nam = (struct sockaddr *)sin6_p;
2820}
| 2016 * Convert IP6 address to printable (loggable) representation. Caller
2017 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
2018 */
2019static char digits[] = "0123456789abcdef";
2020char *
2021ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
2022{
2023 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
2024 char *cp;
2025 const u_int16_t *a = (const u_int16_t *)addr;
2026 const u_int8_t *d;
2027 int dcolon = 0, zero = 0;
2028
2029 cp = ip6buf;
2030
2031 for (i = 0; i < 8; i++) {
2032 if (*(a + i) == 0) {
2033 cnt++;
2034 if (cnt == 1)
2035 idx = i;
2036 }
2037 else if (maxcnt < cnt) {
2038 maxcnt = cnt;
2039 index = idx;
2040 cnt = 0;
2041 }
2042 }
2043 if (maxcnt < cnt) {
2044 maxcnt = cnt;
2045 index = idx;
2046 }
2047
2048 for (i = 0; i < 8; i++) {
2049 if (dcolon == 1) {
2050 if (*a == 0) {
2051 if (i == 7)
2052 *cp++ = ':';
2053 a++;
2054 continue;
2055 } else
2056 dcolon = 2;
2057 }
2058 if (*a == 0) {
2059 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
2060 if (i == 0)
2061 *cp++ = ':';
2062 *cp++ = ':';
2063 dcolon = 1;
2064 } else {
2065 *cp++ = '0';
2066 *cp++ = ':';
2067 }
2068 a++;
2069 continue;
2070 }
2071 d = (const u_char *)a;
2072 /* Try to eliminate leading zeros in printout like in :0001. */
2073 zero = 1;
2074 *cp = digits[*d >> 4];
2075 if (*cp != '0') {
2076 zero = 0;
2077 cp++;
2078 }
2079 *cp = digits[*d++ & 0xf];
2080 if (zero == 0 || (*cp != '0')) {
2081 zero = 0;
2082 cp++;
2083 }
2084 *cp = digits[*d >> 4];
2085 if (zero == 0 || (*cp != '0')) {
2086 zero = 0;
2087 cp++;
2088 }
2089 *cp++ = digits[*d & 0xf];
2090 *cp++ = ':';
2091 a++;
2092 }
2093 *--cp = '\0';
2094 return (ip6buf);
2095}
2096
2097int
2098in6_localaddr(struct in6_addr *in6)
2099{
2100 struct in6_ifaddr *ia;
2101
2102 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
2103 return 1;
2104
2105 IN6_IFADDR_RLOCK();
2106 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
2107 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
2108 &ia->ia_prefixmask.sin6_addr)) {
2109 IN6_IFADDR_RUNLOCK();
2110 return 1;
2111 }
2112 }
2113 IN6_IFADDR_RUNLOCK();
2114
2115 return (0);
2116}
2117
2118/*
2119 * Return 1 if an internet address is for the local host and configured
2120 * on one of its interfaces.
2121 */
2122int
2123in6_localip(struct in6_addr *in6)
2124{
2125 struct in6_ifaddr *ia;
2126
2127 IN6_IFADDR_RLOCK();
2128 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
2129 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
2130 IN6_IFADDR_RUNLOCK();
2131 return (1);
2132 }
2133 }
2134 IN6_IFADDR_RUNLOCK();
2135 return (0);
2136}
2137
2138int
2139in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
2140{
2141 struct in6_ifaddr *ia;
2142
2143 IN6_IFADDR_RLOCK();
2144 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
2145 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
2146 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
2147 IN6_IFADDR_RUNLOCK();
2148 return (1); /* true */
2149 }
2150 break;
2151 }
2152 }
2153 IN6_IFADDR_RUNLOCK();
2154
2155 return (0); /* false */
2156}
2157
2158/*
2159 * return length of part which dst and src are equal
2160 * hard coding...
2161 */
2162int
2163in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
2164{
2165 int match = 0;
2166 u_char *s = (u_char *)src, *d = (u_char *)dst;
2167 u_char *lim = s + 16, r;
2168
2169 while (s < lim)
2170 if ((r = (*d++ ^ *s++)) != 0) {
2171 while (r < 128) {
2172 match++;
2173 r <<= 1;
2174 }
2175 break;
2176 } else
2177 match += 8;
2178 return match;
2179}
2180
2181/* XXX: to be scope conscious */
2182int
2183in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
2184{
2185 int bytelen, bitlen;
2186
2187 /* sanity check */
2188 if (0 > len || len > 128) {
2189 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
2190 len);
2191 return (0);
2192 }
2193
2194 bytelen = len / 8;
2195 bitlen = len % 8;
2196
2197 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
2198 return (0);
2199 if (bitlen != 0 &&
2200 p1->s6_addr[bytelen] >> (8 - bitlen) !=
2201 p2->s6_addr[bytelen] >> (8 - bitlen))
2202 return (0);
2203
2204 return (1);
2205}
2206
2207void
2208in6_prefixlen2mask(struct in6_addr *maskp, int len)
2209{
2210 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
2211 int bytelen, bitlen, i;
2212
2213 /* sanity check */
2214 if (0 > len || len > 128) {
2215 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
2216 len);
2217 return;
2218 }
2219
2220 bzero(maskp, sizeof(*maskp));
2221 bytelen = len / 8;
2222 bitlen = len % 8;
2223 for (i = 0; i < bytelen; i++)
2224 maskp->s6_addr[i] = 0xff;
2225 if (bitlen)
2226 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2227}
2228
2229/*
2230 * return the best address out of the same scope. if no address was
2231 * found, return the first valid address from designated IF.
2232 */
2233struct in6_ifaddr *
2234in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2235{
2236 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2237 struct ifaddr *ifa;
2238 struct in6_ifaddr *besta = 0;
2239 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2240
2241 dep[0] = dep[1] = NULL;
2242
2243 /*
2244 * We first look for addresses in the same scope.
2245 * If there is one, return it.
2246 * If two or more, return one which matches the dst longest.
2247 * If none, return one of global addresses assigned other ifs.
2248 */
2249 IF_ADDR_RLOCK(ifp);
2250 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2251 if (ifa->ifa_addr->sa_family != AF_INET6)
2252 continue;
2253 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2254 continue; /* XXX: is there any case to allow anycast? */
2255 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2256 continue; /* don't use this interface */
2257 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2258 continue;
2259 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2260 if (V_ip6_use_deprecated)
2261 dep[0] = (struct in6_ifaddr *)ifa;
2262 continue;
2263 }
2264
2265 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2266 /*
2267 * call in6_matchlen() as few as possible
2268 */
2269 if (besta) {
2270 if (blen == -1)
2271 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2272 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2273 if (tlen > blen) {
2274 blen = tlen;
2275 besta = (struct in6_ifaddr *)ifa;
2276 }
2277 } else
2278 besta = (struct in6_ifaddr *)ifa;
2279 }
2280 }
2281 if (besta) {
2282 ifa_ref(&besta->ia_ifa);
2283 IF_ADDR_RUNLOCK(ifp);
2284 return (besta);
2285 }
2286
2287 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2288 if (ifa->ifa_addr->sa_family != AF_INET6)
2289 continue;
2290 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2291 continue; /* XXX: is there any case to allow anycast? */
2292 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2293 continue; /* don't use this interface */
2294 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2295 continue;
2296 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2297 if (V_ip6_use_deprecated)
2298 dep[1] = (struct in6_ifaddr *)ifa;
2299 continue;
2300 }
2301
2302 if (ifa != NULL)
2303 ifa_ref(ifa);
2304 IF_ADDR_RUNLOCK(ifp);
2305 return (struct in6_ifaddr *)ifa;
2306 }
2307
2308 /* use the last-resort values, that are, deprecated addresses */
2309 if (dep[0]) {
2310 ifa_ref((struct ifaddr *)dep[0]);
2311 IF_ADDR_RUNLOCK(ifp);
2312 return dep[0];
2313 }
2314 if (dep[1]) {
2315 ifa_ref((struct ifaddr *)dep[1]);
2316 IF_ADDR_RUNLOCK(ifp);
2317 return dep[1];
2318 }
2319
2320 IF_ADDR_RUNLOCK(ifp);
2321 return NULL;
2322}
2323
2324/*
2325 * perform DAD when interface becomes IFF_UP.
2326 */
2327void
2328in6_if_up(struct ifnet *ifp)
2329{
2330 struct ifaddr *ifa;
2331 struct in6_ifaddr *ia;
2332
2333 IF_ADDR_RLOCK(ifp);
2334 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2335 if (ifa->ifa_addr->sa_family != AF_INET6)
2336 continue;
2337 ia = (struct in6_ifaddr *)ifa;
2338 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2339 /*
2340 * The TENTATIVE flag was likely set by hand
2341 * beforehand, implicitly indicating the need for DAD.
2342 * We may be able to skip the random delay in this
2343 * case, but we impose delays just in case.
2344 */
2345 nd6_dad_start(ifa,
2346 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2347 }
2348 }
2349 IF_ADDR_RUNLOCK(ifp);
2350
2351 /*
2352 * special cases, like 6to4, are handled in in6_ifattach
2353 */
2354 in6_ifattach(ifp, NULL);
2355}
2356
2357int
2358in6if_do_dad(struct ifnet *ifp)
2359{
2360 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2361 return (0);
2362
2363 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
2364 return (0);
2365
2366 switch (ifp->if_type) {
2367#ifdef IFT_DUMMY
2368 case IFT_DUMMY:
2369#endif
2370 case IFT_FAITH:
2371 /*
2372 * These interfaces do not have the IFF_LOOPBACK flag,
2373 * but loop packets back. We do not have to do DAD on such
2374 * interfaces. We should even omit it, because loop-backed
2375 * NS would confuse the DAD procedure.
2376 */
2377 return (0);
2378 default:
2379 /*
2380 * Our DAD routine requires the interface up and running.
2381 * However, some interfaces can be up before the RUNNING
2382 * status. Additionaly, users may try to assign addresses
2383 * before the interface becomes up (or running).
2384 * We simply skip DAD in such a case as a work around.
2385 * XXX: we should rather mark "tentative" on such addresses,
2386 * and do DAD after the interface becomes ready.
2387 */
2388 if (!((ifp->if_flags & IFF_UP) &&
2389 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
2390 return (0);
2391
2392 return (1);
2393 }
2394}
2395
2396/*
2397 * Calculate max IPv6 MTU through all the interfaces and store it
2398 * to in6_maxmtu.
2399 */
2400void
2401in6_setmaxmtu(void)
2402{
2403 unsigned long maxmtu = 0;
2404 struct ifnet *ifp;
2405
2406 IFNET_RLOCK_NOSLEEP();
2407 TAILQ_FOREACH(ifp, &V_ifnet, if_list) {
2408 /* this function can be called during ifnet initialization */
2409 if (!ifp->if_afdata[AF_INET6])
2410 continue;
2411 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2412 IN6_LINKMTU(ifp) > maxmtu)
2413 maxmtu = IN6_LINKMTU(ifp);
2414 }
2415 IFNET_RUNLOCK_NOSLEEP();
2416 if (maxmtu) /* update only when maxmtu is positive */
2417 V_in6_maxmtu = maxmtu;
2418}
2419
2420/*
2421 * Provide the length of interface identifiers to be used for the link attached
2422 * to the given interface. The length should be defined in "IPv6 over
2423 * xxx-link" document. Note that address architecture might also define
2424 * the length for a particular set of address prefixes, regardless of the
2425 * link type. As clarified in rfc2462bis, those two definitions should be
2426 * consistent, and those really are as of August 2004.
2427 */
2428int
2429in6_if2idlen(struct ifnet *ifp)
2430{
2431 switch (ifp->if_type) {
2432 case IFT_ETHER: /* RFC2464 */
2433#ifdef IFT_PROPVIRTUAL
2434 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2435#endif
2436#ifdef IFT_L2VLAN
2437 case IFT_L2VLAN: /* ditto */
2438#endif
2439#ifdef IFT_IEEE80211
2440 case IFT_IEEE80211: /* ditto */
2441#endif
2442#ifdef IFT_MIP
2443 case IFT_MIP: /* ditto */
2444#endif
2445 case IFT_INFINIBAND:
2446 return (64);
2447 case IFT_FDDI: /* RFC2467 */
2448 return (64);
2449 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */
2450 return (64);
2451 case IFT_PPP: /* RFC2472 */
2452 return (64);
2453 case IFT_ARCNET: /* RFC2497 */
2454 return (64);
2455 case IFT_FRELAY: /* RFC2590 */
2456 return (64);
2457 case IFT_IEEE1394: /* RFC3146 */
2458 return (64);
2459 case IFT_GIF:
2460 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2461 case IFT_LOOP:
2462 return (64); /* XXX: is this really correct? */
2463 default:
2464 /*
2465 * Unknown link type:
2466 * It might be controversial to use the today's common constant
2467 * of 64 for these cases unconditionally. For full compliance,
2468 * we should return an error in this case. On the other hand,
2469 * if we simply miss the standard for the link type or a new
2470 * standard is defined for a new link type, the IFID length
2471 * is very likely to be the common constant. As a compromise,
2472 * we always use the constant, but make an explicit notice
2473 * indicating the "unknown" case.
2474 */
2475 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2476 return (64);
2477 }
2478}
2479
2480#include <sys/sysctl.h>
2481
2482struct in6_llentry {
2483 struct llentry base;
2484 struct sockaddr_in6 l3_addr6;
2485};
2486
2487/*
2488 * Deletes an address from the address table.
2489 * This function is called by the timer functions
2490 * such as arptimer() and nd6_llinfo_timer(), and
2491 * the caller does the locking.
2492 */
2493static void
2494in6_lltable_free(struct lltable *llt, struct llentry *lle)
2495{
2496 LLE_WUNLOCK(lle);
2497 LLE_LOCK_DESTROY(lle);
2498 free(lle, M_LLTABLE);
2499}
2500
2501static struct llentry *
2502in6_lltable_new(const struct sockaddr *l3addr, u_int flags)
2503{
2504 struct in6_llentry *lle;
2505
2506 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2507 if (lle == NULL) /* NB: caller generates msg */
2508 return NULL;
2509
2510 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr;
2511 lle->base.lle_refcnt = 1;
2512 lle->base.lle_free = in6_lltable_free;
2513 LLE_LOCK_INIT(&lle->base);
2514 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock,
2515 CALLOUT_RETURNUNLOCKED);
2516
2517 return (&lle->base);
2518}
2519
2520static void
2521in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix,
2522 const struct sockaddr *mask, u_int flags)
2523{
2524 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix;
2525 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask;
2526 struct llentry *lle, *next;
2527 int i;
2528
2529 /*
2530 * (flags & LLE_STATIC) means deleting all entries
2531 * including static ND6 entries.
2532 */
2533 IF_AFDATA_WLOCK(llt->llt_ifp);
2534 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2535 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) {
2536 if (IN6_ARE_MASKED_ADDR_EQUAL(
2537 &satosin6(L3_ADDR(lle))->sin6_addr,
2538 &pfx->sin6_addr, &msk->sin6_addr) &&
2539 ((flags & LLE_STATIC) ||
2540 !(lle->la_flags & LLE_STATIC))) {
2541 LLE_WLOCK(lle);
2542 if (callout_stop(&lle->la_timer))
2543 LLE_REMREF(lle);
2544 llentry_free(lle);
2545 }
2546 }
2547 }
2548 IF_AFDATA_WUNLOCK(llt->llt_ifp);
2549}
2550
2551static int
2552in6_lltable_rtcheck(struct ifnet *ifp,
2553 u_int flags,
2554 const struct sockaddr *l3addr)
2555{
2556 struct rtentry *rt;
2557 char ip6buf[INET6_ADDRSTRLEN];
2558
2559 KASSERT(l3addr->sa_family == AF_INET6,
2560 ("sin_family %d", l3addr->sa_family));
2561
2562 /* Our local addresses are always only installed on the default FIB. */
2563 /* XXX rtalloc1 should take a const param */
2564 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0,
2565 RT_DEFAULT_FIB);
2566 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) {
2567 struct ifaddr *ifa;
2568 /*
2569 * Create an ND6 cache for an IPv6 neighbor
2570 * that is not covered by our own prefix.
2571 */
2572 /* XXX ifaof_ifpforaddr should take a const param */
2573 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp);
2574 if (ifa != NULL) {
2575 ifa_free(ifa);
2576 if (rt != NULL)
2577 RTFREE_LOCKED(rt);
2578 return 0;
2579 }
2580 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2581 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr));
2582 if (rt != NULL)
2583 RTFREE_LOCKED(rt);
2584 return EINVAL;
2585 }
2586 RTFREE_LOCKED(rt);
2587 return 0;
2588}
2589
2590static struct llentry *
2591in6_lltable_lookup(struct lltable *llt, u_int flags,
2592 const struct sockaddr *l3addr)
2593{
2594 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2595 struct ifnet *ifp = llt->llt_ifp;
2596 struct llentry *lle;
2597 struct llentries *lleh;
2598 u_int hashkey;
2599
2600 IF_AFDATA_LOCK_ASSERT(ifp);
2601 KASSERT(l3addr->sa_family == AF_INET6,
2602 ("sin_family %d", l3addr->sa_family));
2603
2604 hashkey = sin6->sin6_addr.s6_addr32[3];
2605 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)];
2606 LIST_FOREACH(lle, lleh, lle_next) {
2607 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle);
2608 if (lle->la_flags & LLE_DELETED)
2609 continue;
2610 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr,
2611 sizeof(struct in6_addr)) == 0)
2612 break;
2613 }
2614
2615 if (lle == NULL) {
2616 if (!(flags & LLE_CREATE))
2617 return (NULL);
2618 /*
2619 * A route that covers the given address must have
2620 * been installed 1st because we are doing a resolution,
2621 * verify this.
2622 */
2623 if (!(flags & LLE_IFADDR) &&
2624 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2625 return NULL;
2626
2627 lle = in6_lltable_new(l3addr, flags);
2628 if (lle == NULL) {
2629 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2630 return NULL;
2631 }
2632 lle->la_flags = flags & ~LLE_CREATE;
2633 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) {
2634 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen);
2635 lle->la_flags |= (LLE_VALID | LLE_STATIC);
2636 }
2637
2638 lle->lle_tbl = llt;
2639 lle->lle_head = lleh;
2640 lle->la_flags |= LLE_LINKED;
2641 LIST_INSERT_HEAD(lleh, lle, lle_next);
2642 } else if (flags & LLE_DELETE) {
2643 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) {
2644 LLE_WLOCK(lle);
2645 lle->la_flags |= LLE_DELETED;
2646#ifdef DIAGNOSTIC
2647 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2648#endif
2649 if ((lle->la_flags &
2650 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC)
2651 llentry_free(lle);
2652 else
2653 LLE_WUNLOCK(lle);
2654 }
2655 lle = (void *)-1;
2656 }
2657 if (LLE_IS_VALID(lle)) {
2658 if (flags & LLE_EXCLUSIVE)
2659 LLE_WLOCK(lle);
2660 else
2661 LLE_RLOCK(lle);
2662 }
2663 return (lle);
2664}
2665
2666static int
2667in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr)
2668{
2669 struct ifnet *ifp = llt->llt_ifp;
2670 struct llentry *lle;
2671 /* XXX stack use */
2672 struct {
2673 struct rt_msghdr rtm;
2674 struct sockaddr_in6 sin6;
2675 /*
2676 * ndp.c assumes that sdl is word aligned
2677 */
2678#ifdef __LP64__
2679 uint32_t pad;
2680#endif
2681 struct sockaddr_dl sdl;
2682 } ndpc;
2683 int i, error;
2684
2685 if (ifp->if_flags & IFF_LOOPBACK)
2686 return 0;
2687
2688 LLTABLE_LOCK_ASSERT();
2689
2690 error = 0;
2691 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) {
2692 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) {
2693 struct sockaddr_dl *sdl;
2694
2695 /* skip deleted or invalid entries */
2696 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID)
2697 continue;
2698 /* Skip if jailed and not a valid IP of the prison. */
2699 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0)
2700 continue;
2701 /*
2702 * produce a msg made of:
2703 * struct rt_msghdr;
2704 * struct sockaddr_in6 (IPv6)
2705 * struct sockaddr_dl;
2706 */
2707 bzero(&ndpc, sizeof(ndpc));
2708 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2709 ndpc.rtm.rtm_version = RTM_VERSION;
2710 ndpc.rtm.rtm_type = RTM_GET;
2711 ndpc.rtm.rtm_flags = RTF_UP;
2712 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2713 ndpc.sin6.sin6_family = AF_INET6;
2714 ndpc.sin6.sin6_len = sizeof(ndpc.sin6);
2715 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle));
2716 if (V_deembed_scopeid)
2717 sa6_recoverscope(&ndpc.sin6);
2718
2719 /* publish */
2720 if (lle->la_flags & LLE_PUB)
2721 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2722
2723 sdl = &ndpc.sdl;
2724 sdl->sdl_family = AF_LINK;
2725 sdl->sdl_len = sizeof(*sdl);
2726 sdl->sdl_alen = ifp->if_addrlen;
2727 sdl->sdl_index = ifp->if_index;
2728 sdl->sdl_type = ifp->if_type;
2729 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2730 ndpc.rtm.rtm_rmx.rmx_expire =
2731 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire;
2732 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2733 if (lle->la_flags & LLE_STATIC)
2734 ndpc.rtm.rtm_flags |= RTF_STATIC;
2735 ndpc.rtm.rtm_index = ifp->if_index;
2736 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2737 if (error)
2738 break;
2739 }
2740 }
2741 return error;
2742}
2743
2744void *
2745in6_domifattach(struct ifnet *ifp)
2746{
2747 struct in6_ifextra *ext;
2748
2749 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2750 bzero(ext, sizeof(*ext));
2751
2752 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat),
2753 M_IFADDR, M_WAITOK);
2754 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2755
2756 ext->icmp6_ifstat =
2757 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat),
2758 M_IFADDR, M_WAITOK);
2759 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2760
2761 ext->nd_ifinfo = nd6_ifattach(ifp);
2762 ext->scope6_id = scope6_ifattach(ifp);
2763 ext->lltable = lltable_init(ifp, AF_INET6);
2764 if (ext->lltable != NULL) {
2765 ext->lltable->llt_prefix_free = in6_lltable_prefix_free;
2766 ext->lltable->llt_lookup = in6_lltable_lookup;
2767 ext->lltable->llt_dump = in6_lltable_dump;
2768 }
2769
2770 ext->mld_ifinfo = mld_domifattach(ifp);
2771
2772 return ext;
2773}
2774
2775void
2776in6_domifdetach(struct ifnet *ifp, void *aux)
2777{
2778 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2779
2780 mld_domifdetach(ifp);
2781 scope6_ifdetach(ext->scope6_id);
2782 nd6_ifdetach(ext->nd_ifinfo);
2783 lltable_free(ext->lltable);
2784 free(ext->in6_ifstat, M_IFADDR);
2785 free(ext->icmp6_ifstat, M_IFADDR);
2786 free(ext, M_IFADDR);
2787}
2788
2789/*
2790 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2791 * v4 mapped addr or v4 compat addr
2792 */
2793void
2794in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2795{
2796
2797 bzero(sin, sizeof(*sin));
2798 sin->sin_len = sizeof(struct sockaddr_in);
2799 sin->sin_family = AF_INET;
2800 sin->sin_port = sin6->sin6_port;
2801 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2802}
2803
2804/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2805void
2806in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2807{
2808 bzero(sin6, sizeof(*sin6));
2809 sin6->sin6_len = sizeof(struct sockaddr_in6);
2810 sin6->sin6_family = AF_INET6;
2811 sin6->sin6_port = sin->sin_port;
2812 sin6->sin6_addr.s6_addr32[0] = 0;
2813 sin6->sin6_addr.s6_addr32[1] = 0;
2814 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2815 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2816}
2817
2818/* Convert sockaddr_in6 into sockaddr_in. */
2819void
2820in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2821{
2822 struct sockaddr_in *sin_p;
2823 struct sockaddr_in6 sin6;
2824
2825 /*
2826 * Save original sockaddr_in6 addr and convert it
2827 * to sockaddr_in.
2828 */
2829 sin6 = *(struct sockaddr_in6 *)nam;
2830 sin_p = (struct sockaddr_in *)nam;
2831 in6_sin6_2_sin(sin_p, &sin6);
2832}
2833
2834/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2835void
2836in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2837{
2838 struct sockaddr_in *sin_p;
2839 struct sockaddr_in6 *sin6_p;
2840
2841 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2842 sin_p = (struct sockaddr_in *)*nam;
2843 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2844 free(*nam, M_SONAME);
2845 *nam = (struct sockaddr *)sin6_p;
2846}
|