1 /* $FreeBSD: src/sys/netinet6/in6.c,v 1.7.2.9 2002/04/28 05:40:26 suz Exp $ */
2 /* $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
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51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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61 * @(#)in.c 8.2 (Berkeley) 11/15/93
65 #include "opt_inet6.h"
67 #include <sys/param.h>
68 #include <sys/errno.h>
69 #include <sys/malloc.h>
70 #include <sys/socket.h>
71 #include <sys/socketvar.h>
72 #include <sys/sockio.h>
73 #include <sys/systm.h>
77 #include <sys/kernel.h>
78 #include <sys/syslog.h>
81 #include <sys/thread2.h>
82 #include <sys/msgport2.h>
85 #include <net/if_types.h>
86 #include <net/route.h>
87 #include <net/if_dl.h>
88 #include <net/netmsg2.h>
89 #include <net/netisr2.h>
91 #include <netinet/in.h>
92 #include <netinet/in_var.h>
93 #include <netinet/if_ether.h>
94 #include <netinet/in_systm.h>
95 #include <netinet/ip.h>
96 #include <netinet/in_pcb.h>
98 #include <netinet/ip6.h>
99 #include <netinet6/ip6_var.h>
100 #include <netinet6/nd6.h>
101 #include <netinet6/mld6_var.h>
102 #include <netinet6/ip6_mroute.h>
103 #include <netinet6/in6_ifattach.h>
104 #include <netinet6/scope6_var.h>
105 #include <netinet6/in6_pcb.h>
106 #include <netinet6/in6_var.h>
108 #include <net/net_osdep.h>
111 * Definitions of some costant IP6 addresses.
113 const struct in6_addr kin6addr_any = IN6ADDR_ANY_INIT;
114 const struct in6_addr kin6addr_loopback = IN6ADDR_LOOPBACK_INIT;
115 const struct in6_addr kin6addr_nodelocal_allnodes =
116 IN6ADDR_NODELOCAL_ALLNODES_INIT;
117 const struct in6_addr kin6addr_linklocal_allnodes =
118 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
119 const struct in6_addr kin6addr_linklocal_allrouters =
120 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
122 const struct in6_addr in6mask0 = IN6MASK0;
123 const struct in6_addr in6mask32 = IN6MASK32;
124 const struct in6_addr in6mask64 = IN6MASK64;
125 const struct in6_addr in6mask96 = IN6MASK96;
126 const struct in6_addr in6mask128 = IN6MASK128;
128 const struct sockaddr_in6 sa6_any = {sizeof(sa6_any), AF_INET6,
129 0, 0, IN6ADDR_ANY_INIT, 0};
131 static int in6_lifaddr_ioctl (u_long, caddr_t, struct ifnet *,
133 static int in6_ifinit (struct ifnet *, struct in6_ifaddr *,
134 struct sockaddr_in6 *, int);
135 static void in6_unlink_ifa (struct in6_ifaddr *, struct ifnet *);
136 static void in6_ifloop_request_callback(int, int, struct rt_addrinfo *, struct rtentry *, void *);
138 static void in6_control_internal_dispatch(netmsg_t);
139 static int in6_control_internal(u_long, caddr_t, struct ifnet *,
142 struct in6_multihead in6_multihead; /* XXX BSS initialization */
144 int (*faithprefix_p)(struct in6_addr *);
147 * Subroutine for in6_ifaddloop() and in6_ifremloop().
148 * This routine does actual work.
151 in6_ifloop_request(int cmd, struct ifaddr *ifa)
153 struct sockaddr_in6 all1_sa;
154 struct rt_addrinfo rtinfo;
157 bzero(&all1_sa, sizeof(all1_sa));
158 all1_sa.sin6_family = AF_INET6;
159 all1_sa.sin6_len = sizeof(struct sockaddr_in6);
160 all1_sa.sin6_addr = in6mask128;
163 * We specify the address itself as the gateway, and set the
164 * RTF_LLINFO flag, so that the corresponding host route would have
165 * the flag, and thus applications that assume traditional behavior
166 * would be happy. Note that we assume the caller of the function
167 * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest,
168 * which changes the outgoing interface to the loopback interface.
170 bzero(&rtinfo, sizeof(struct rt_addrinfo));
171 rtinfo.rti_info[RTAX_DST] = ifa->ifa_addr;
172 rtinfo.rti_info[RTAX_GATEWAY] = ifa->ifa_addr;
173 rtinfo.rti_info[RTAX_NETMASK] = (struct sockaddr *)&all1_sa;
174 rtinfo.rti_flags = RTF_UP|RTF_HOST|RTF_LLINFO;
176 error = rtrequest1_global(cmd, &rtinfo,
177 in6_ifloop_request_callback, ifa, RTREQ_PRIO_NORM);
179 log(LOG_ERR, "in6_ifloop_request: "
180 "%s operation failed for %s (errno=%d)\n",
181 cmd == RTM_ADD ? "ADD" : "DELETE",
182 ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr),
188 in6_ifloop_request_callback(int cmd, int error, struct rt_addrinfo *rtinfo,
189 struct rtentry *rt, void *arg)
191 struct ifaddr *ifa = arg;
197 * Make sure rt_ifa be equal to IFA, the second argument of the
199 * We need this because when we refer to rt_ifa->ia6_flags in
200 * ip6_input, we assume that the rt_ifa points to the address instead
201 * of the loopback address.
203 if (cmd == RTM_ADD && rt && ifa != rt->rt_ifa) {
212 * Report the addition/removal of the address to the routing socket.
213 * XXX: since we called rtinit for a p2p interface with a destination,
214 * we end up reporting twice in such a case. Should we rather
215 * omit the second report?
219 rt_newaddrmsg(cmd, ifa, error, rt);
220 if (cmd == RTM_DELETE) {
221 if (rt->rt_refcnt == 0) {
228 /* no way to return any new error */
233 * Add ownaddr as loopback rtentry. We previously add the route only if
234 * necessary (ex. on a p2p link). However, since we now manage addresses
235 * separately from prefixes, we should always add the route. We can't
236 * rely on the cloning mechanism from the corresponding interface route
240 in6_ifaddloop(struct ifaddr *ifa)
244 /* If there is no loopback entry, allocate one. */
245 rt = rtpurelookup(ifa->ifa_addr);
246 if (rt == NULL || !(rt->rt_flags & RTF_HOST) ||
247 !(rt->rt_ifp->if_flags & IFF_LOOPBACK))
248 in6_ifloop_request(RTM_ADD, ifa);
254 * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(),
258 in6_ifremloop(struct ifaddr *ifa)
260 struct in6_ifaddr *ia;
265 * Some of BSD variants do not remove cloned routes
266 * from an interface direct route, when removing the direct route
267 * (see comments in net/net_osdep.h). Even for variants that do remove
268 * cloned routes, they could fail to remove the cloned routes when
269 * we handle multple addresses that share a common prefix.
270 * So, we should remove the route corresponding to the deleted address
271 * regardless of the result of in6_is_ifloop_auto().
275 * Delete the entry only if exact one ifa exists. More than one ifa
276 * can exist if we assign a same single address to multiple
277 * (probably p2p) interfaces.
278 * XXX: we should avoid such a configuration in IPv6...
280 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
281 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) {
290 * Before deleting, check if a corresponding loopbacked host
291 * route surely exists. With this check, we can avoid to
292 * delete an interface direct route whose destination is same
293 * as the address being removed. This can happen when remofing
294 * a subnet-router anycast address on an interface attahced
295 * to a shared medium.
297 rt = rtpurelookup(ifa->ifa_addr);
298 if (rt != NULL && (rt->rt_flags & RTF_HOST) &&
299 (rt->rt_ifp->if_flags & IFF_LOOPBACK)) {
301 in6_ifloop_request(RTM_DELETE, ifa);
307 in6_mask2len(const struct in6_addr *mask, const u_char *lim0)
310 const u_char *lim = lim0, *p;
313 lim0 - (const u_char *)mask > sizeof(*mask)) {
314 /* Ignore the scope_id part */
315 lim = (const u_char *)mask + sizeof(*mask);
317 for (p = (const u_char *)mask; p < lim; x++, p++) {
323 for (y = 0; y < 8; y++) {
324 if ((*p & (0x80 >> y)) == 0)
330 * When the limit pointer is given, do a stricter check on the
334 if (y != 0 && (*p & (0x00ff >> y)) != 0)
336 for (p = p + 1; p < lim; p++)
344 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
345 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
348 in6_control_dispatch(netmsg_t msg)
352 error = in6_control(msg->control.nm_cmd,
353 msg->control.nm_data,
356 lwkt_replymsg(&msg->control.base.lmsg, error);
360 in6_control(u_long cmd, caddr_t data, struct ifnet *ifp, struct thread *td)
362 struct netmsg_pru_control msg;
365 case SIOCSIFPREFIX_IN6:
366 case SIOCDIFPREFIX_IN6:
367 case SIOCAIFPREFIX_IN6:
368 case SIOCCIFPREFIX_IN6:
369 case SIOCSGIFPREFIX_IN6:
370 case SIOCGIFPREFIX_IN6:
371 log(LOG_NOTICE, "prefix ioctls are now invalidated. "
372 "please use ifconfig.\n");
375 case SIOCSIFADDR_IN6:
376 case SIOCSIFDSTADDR_IN6:
377 case SIOCSIFNETMASK_IN6:
379 * Since IPv6 allows a node to assign multiple addresses
380 * on a single interface, SIOCSIFxxx ioctls are not suitable
381 * and should be unused.
383 /* We decided to obsolete this command (20000704) */
391 * Do not pass those ioctl to driver handler since they are not
392 * properly setup. Instead just error out.
397 case SIOCGETSGCNT_IN6:
398 case SIOCGETMIFCNT_IN6:
400 case SIOCAADDRCTL_POLICY:
401 case SIOCDADDRCTL_POLICY:
403 case SIOCSNDFLUSH_IN6:
404 case SIOCSPFXFLUSH_IN6:
405 case SIOCSRTRFLUSH_IN6:
406 case SIOCSDEFIFACE_IN6:
407 case SIOCSIFINFO_FLAGS:
408 case OSIOCGIFINFO_IN6:
409 case SIOCGIFINFO_IN6:
412 case SIOCGNBRINFO_IN6:
413 case SIOCGDEFIFACE_IN6:
421 case SIOCSIFALIFETIME_IN6:
422 case SIOCAIFADDR_IN6:
423 case SIOCDIFADDR_IN6:
425 * Dispatch these SIOCs to netisr0.
427 netmsg_init(&msg.base, NULL, &curthread->td_msgport, 0,
428 in6_control_internal_dispatch);
433 lwkt_domsg(netisr_cpuport(0), &msg.base.lmsg, 0);
434 return msg.base.lmsg.ms_error;
437 return in6_control_internal(cmd, data, ifp, td);
442 in6_control_internal_dispatch(netmsg_t msg)
446 error = in6_control_internal(msg->control.nm_cmd, msg->control.nm_data,
447 msg->control.nm_ifp, msg->control.nm_td);
448 lwkt_replymsg(&msg->lmsg, error);
452 in6_control_internal(u_long cmd, caddr_t data, struct ifnet *ifp,
455 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
456 struct in6_ifaddr *ia = NULL;
457 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
458 struct in6_ifextra *xtra;
459 boolean_t privileged;
463 if (priv_check(td, PRIV_ROOT) == 0)
475 return in6_lifaddr_ioctl(cmd, data, ifp, td);
479 case SIOCGETSGCNT_IN6:
480 case SIOCGETMIFCNT_IN6:
481 return (mrt6_ioctl(cmd, data));
485 case SIOCAADDRCTL_POLICY:
486 case SIOCDADDRCTL_POLICY:
489 return (in6_src_ioctl(cmd, data));
496 case SIOCSNDFLUSH_IN6:
497 case SIOCSPFXFLUSH_IN6:
498 case SIOCSRTRFLUSH_IN6:
499 case SIOCSDEFIFACE_IN6:
500 case SIOCSIFINFO_FLAGS:
504 case OSIOCGIFINFO_IN6:
505 case SIOCGIFINFO_IN6:
508 case SIOCGNBRINFO_IN6:
509 case SIOCGDEFIFACE_IN6:
510 return (nd6_ioctl(cmd, data, ifp));
517 return (scope6_set(ifp,
518 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
521 return (scope6_get(ifp,
522 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
525 return (scope6_get_default((struct scope6_id *)
526 ifr->ifr_ifru.ifru_scope_id));
530 * Find address for this interface, if it exists.
532 if (ifra->ifra_addr.sin6_family == AF_INET6) { /* XXX */
533 struct sockaddr_in6 *sa6 =
534 (struct sockaddr_in6 *)&ifra->ifra_addr;
536 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) {
537 if (sa6->sin6_addr.s6_addr16[1] == 0) {
538 /* Link ID is not embedded by the user */
539 sa6->sin6_addr.s6_addr16[1] =
540 htons(ifp->if_index);
541 } else if (sa6->sin6_addr.s6_addr16[1] !=
542 htons(ifp->if_index)) {
543 /* Link ID contradicts */
546 if (sa6->sin6_scope_id) {
547 if (sa6->sin6_scope_id !=
548 (u_int32_t)ifp->if_index)
550 sa6->sin6_scope_id = 0; /* XXX: good way? */
553 ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
557 case SIOCDIFADDR_IN6:
559 * For IPv4, we look for existing in_ifaddr here to allow
560 * "ifconfig if0 delete" to remove first IPv4 address on the
561 * interface. For IPv6, as the spec allow multiple interface
562 * address from the day one, we consider "remove the first one"
563 * semantics to be not preferable.
566 return (EADDRNOTAVAIL);
568 case SIOCAIFADDR_IN6:
570 * We always require users to specify a valid IPv6 address for
571 * the corresponding operation.
573 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
574 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6))
575 return (EAFNOSUPPORT);
580 case SIOCGIFADDR_IN6:
581 /* This interface is basically deprecated. Use SIOCGIFCONF. */
583 case SIOCGIFAFLAG_IN6:
584 case SIOCGIFNETMASK_IN6:
585 case SIOCGIFDSTADDR_IN6:
586 case SIOCGIFALIFETIME_IN6:
587 /* Must think again about its semantics */
589 return (EADDRNOTAVAIL);
592 case SIOCSIFALIFETIME_IN6:
594 const struct in6_addrlifetime *lt;
599 return (EADDRNOTAVAIL);
600 /* Sanity for overflow - beware unsigned */
601 lt = &ifr->ifr_ifru.ifru_lifetime;
602 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME &&
603 lt->ia6t_vltime + time_uptime < time_uptime)
605 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME &&
606 lt->ia6t_pltime + time_uptime < time_uptime)
613 case SIOCGIFADDR_IN6:
614 ifr->ifr_addr = ia->ia_addr;
617 case SIOCGIFDSTADDR_IN6:
618 if (!(ifp->if_flags & IFF_POINTOPOINT))
621 * XXX: Should we check if ifa_dstaddr is NULL and return
624 ifr->ifr_dstaddr = ia->ia_dstaddr;
627 case SIOCGIFNETMASK_IN6:
628 ifr->ifr_addr = ia->ia_prefixmask;
631 case SIOCGIFAFLAG_IN6:
632 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
635 case SIOCGIFSTAT_IN6:
636 if ((xtra = ifp->if_afdata[AF_INET6]) == NULL)
638 bzero(&ifr->ifr_ifru.ifru_stat,
639 sizeof(ifr->ifr_ifru.ifru_stat));
640 ifr->ifr_ifru.ifru_stat = *xtra->in6_ifstat;
643 case SIOCGIFSTAT_ICMP6:
644 if ((xtra = ifp->if_afdata[AF_INET6]) == NULL)
646 bzero(&ifr->ifr_ifru.ifru_stat,
647 sizeof(ifr->ifr_ifru.ifru_icmp6stat));
648 ifr->ifr_ifru.ifru_icmp6stat = *xtra->icmp6_ifstat;
651 case SIOCGIFALIFETIME_IN6:
652 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
655 case SIOCSIFALIFETIME_IN6:
656 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
657 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
658 ia->ia6_lifetime.ia6t_expire =
659 time_uptime + ia->ia6_lifetime.ia6t_vltime;
661 ia->ia6_lifetime.ia6t_expire = 0;
663 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
664 ia->ia6_lifetime.ia6t_preferred =
665 time_uptime + ia->ia6_lifetime.ia6t_pltime;
667 ia->ia6_lifetime.ia6t_preferred = 0;
671 case SIOCAIFADDR_IN6:
673 int i, error = 0, iaIsNew;
674 struct nd_prefix pr0, *pr;
682 * First, make or update the interface address structure,
683 * and link it to the list.
685 if ((error = in6_update_ifa(ifp, ifra, ia)) != 0)
689 * Then, make the prefix on-link on the interface.
690 * XXX: We'd rather create the prefix before the address, but
691 * we need at least one address to install the corresponding
692 * interface route, so we configure the address first.
696 * Convert mask to prefix length (prefixmask has already
697 * been validated in in6_update_ifa().
699 bzero(&pr0, sizeof(pr0));
701 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
703 if (pr0.ndpr_plen == 128)
704 break; /* no need to install a host route. */
705 pr0.ndpr_prefix = ifra->ifra_addr;
706 pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr;
707 /* Apply the mask for safety. */
708 for (i = 0; i < 4; i++) {
709 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
710 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
713 * XXX: Since we don't have an API to set prefix (not address)
714 * lifetimes, we just use the same lifetimes as addresses.
715 * The (temporarily) installed lifetimes can be overridden by
716 * later advertised RAs (when accept_rtadv is non 0), which is
717 * an intended behavior.
719 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
721 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
722 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
723 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
725 /* Add the prefix if there's one. */
726 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
728 * nd6_prelist_add will install the corresponding
731 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
734 log(LOG_ERR, "nd6_prelist_add succeeded but "
736 return (EINVAL); /* XXX panic here? */
740 ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
742 /* XXX: This should not happen! */
743 log(LOG_ERR, "in6_control: addition succeeded, but"
746 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
747 ia->ia6_ndpr == NULL) {
749 * New autoconf address
755 * If this is the first autoconf address from
756 * the prefix, create a temporary address
757 * as well (when specified).
759 if (ip6_use_tempaddr && pr->ndpr_refcnt == 1) {
762 if ((e = in6_tmpifadd(ia, 1)) != 0) {
763 log(LOG_NOTICE, "in6_control: "
764 "failed to create a "
765 "temporary address, "
772 * This might affect the status of autoconfigured
773 * addresses, that is, this address might make
774 * other addresses detached.
776 pfxlist_onlink_check();
778 if (error == 0 && ia) {
779 EVENTHANDLER_INVOKE(ifaddr_event, ifp,
780 iaIsNew ? IFADDR_EVENT_ADD : IFADDR_EVENT_CHANGE,
786 case SIOCDIFADDR_IN6:
789 struct nd_prefix pr0, *pr;
792 * If the address being deleted is the only one that owns
793 * the corresponding prefix, expire the prefix as well.
794 * XXX: Theoretically, we don't have to warry about such
795 * relationship, since we separate the address management
796 * and the prefix management. We do this, however, to provide
797 * as much backward compatibility as possible in terms of
798 * the ioctl operation.
800 bzero(&pr0, sizeof(pr0));
802 pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr,
804 if (pr0.ndpr_plen == 128)
806 pr0.ndpr_prefix = ia->ia_addr;
807 pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr;
808 for (i = 0; i < 4; i++) {
809 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
810 ia->ia_prefixmask.sin6_addr.s6_addr32[i];
813 * The logic of the following condition is a bit complicated.
814 * We expire the prefix when
815 * 1. The address obeys autoconfiguration and it is the
816 * only owner of the associated prefix, or
817 * 2. The address does not obey autoconf and there is no
818 * other owner of the prefix.
820 if ((pr = nd6_prefix_lookup(&pr0)) != NULL &&
821 (((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
822 pr->ndpr_refcnt == 1) ||
823 (!(ia->ia6_flags & IN6_IFF_AUTOCONF) &&
824 pr->ndpr_refcnt == 0)))
825 pr->ndpr_expire = 1; /* XXX: just for expiration */
828 EVENTHANDLER_INVOKE(ifaddr_event, ifp, IFADDR_EVENT_DELETE,
830 in6_purgeaddr(&ia->ia_ifa);
835 if (ifp->if_ioctl == NULL)
837 ifnet_serialize_all(ifp);
838 error = ifp->if_ioctl(ifp, cmd, data, td->td_proc->p_ucred);
839 ifnet_deserialize_all(ifp);
847 * Update parameters of an IPv6 interface address.
848 * If necessary, a new entry is created and linked into address chains.
849 * This function is separated from in6_control().
850 * XXX: should this be performed under splnet()?
853 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
854 struct in6_ifaddr *ia)
856 int error = 0, hostIsNew = 0, plen = -1;
857 struct in6_ifaddr *oia;
858 struct sockaddr_in6 dst6;
859 struct in6_addrlifetime *lt;
861 /* Validate parameters */
862 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
866 * The destination address for a p2p link must have a family
867 * of AF_UNSPEC or AF_INET6.
869 if ((ifp->if_flags & IFF_POINTOPOINT) &&
870 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
871 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
872 return (EAFNOSUPPORT);
874 * validate ifra_prefixmask. don't check sin6_family, netmask
875 * does not carry fields other than sin6_len.
877 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
880 * Because the IPv6 address architecture is classless, we require
881 * users to specify a (non 0) prefix length (mask) for a new address.
882 * We also require the prefix (when specified) mask is valid, and thus
883 * reject a non-consecutive mask.
885 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
887 if (ifra->ifra_prefixmask.sin6_len != 0) {
888 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
889 (u_char *)&ifra->ifra_prefixmask +
890 ifra->ifra_prefixmask.sin6_len);
896 * In this case, ia must not be NULL. We just use its prefix
899 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
902 * If the destination address on a p2p interface is specified,
903 * and the address is a scoped one, validate/set the scope
906 dst6 = ifra->ifra_dstaddr;
907 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) &&
908 (dst6.sin6_family == AF_INET6)) {
911 if ((error = in6_recoverscope(&dst6,
912 &ifra->ifra_dstaddr.sin6_addr,
915 scopeid = in6_addr2scopeid(ifp, &dst6.sin6_addr);
916 if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */
917 dst6.sin6_scope_id = scopeid;
918 else if (dst6.sin6_scope_id != scopeid)
919 return (EINVAL); /* scope ID mismatch. */
920 if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL))
923 dst6.sin6_scope_id = 0; /* XXX */
926 * The destination address can be specified only for a p2p or a
927 * loopback interface. If specified, the corresponding prefix length
930 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
931 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) {
932 /* XXX: noisy message */
933 log(LOG_INFO, "in6_update_ifa: a destination can be "
934 "specified for a p2p or a loopback IF only\n");
939 * The following message seems noisy, but we dare to
940 * add it for diagnosis.
942 log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 "
943 "when dstaddr is specified\n");
947 /* lifetime consistency check */
948 lt = &ifra->ifra_lifetime;
949 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
950 && lt->ia6t_vltime + time_uptime < time_uptime) {
953 if (lt->ia6t_vltime == 0) {
955 * the following log might be noisy, but this is a typical
956 * configuration mistake or a tool's bug.
959 "in6_update_ifa: valid lifetime is 0 for %s\n",
960 ip6_sprintf(&ifra->ifra_addr.sin6_addr));
962 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
963 && lt->ia6t_pltime + time_uptime < time_uptime) {
968 * If this is a new address, allocate a new ifaddr and link it
973 ia = ifa_create(sizeof(*ia));
975 /* Initialize the address and masks */
976 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
977 ia->ia_addr.sin6_family = AF_INET6;
978 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
979 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
981 * XXX: some functions expect that ifa_dstaddr is not
982 * NULL for p2p interfaces.
984 ia->ia_ifa.ifa_dstaddr
985 = (struct sockaddr *)&ia->ia_dstaddr;
987 ia->ia_ifa.ifa_dstaddr = NULL;
989 ia->ia_ifa.ifa_netmask
990 = (struct sockaddr *)&ia->ia_prefixmask;
993 if ((oia = in6_ifaddr) != NULL) {
994 for ( ; oia->ia_next; oia = oia->ia_next)
1000 ifa_iflink(&ia->ia_ifa, ifp, 1);
1003 /* set prefix mask */
1004 if (ifra->ifra_prefixmask.sin6_len) {
1006 * We prohibit changing the prefix length of an existing
1008 * + such an operation should be rare in IPv6, and
1009 * + the operation would confuse prefix management.
1011 if (ia->ia_prefixmask.sin6_len &&
1012 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1013 log(LOG_INFO, "in6_update_ifa: the prefix length of an"
1014 " existing (%s) address should not be changed\n",
1015 ip6_sprintf(&ia->ia_addr.sin6_addr));
1019 ia->ia_prefixmask = ifra->ifra_prefixmask;
1023 * If a new destination address is specified, scrub the old one and
1024 * install the new destination. Note that the interface must be
1025 * p2p or loopback (see the check above.)
1027 if (dst6.sin6_family == AF_INET6 &&
1028 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr,
1029 &ia->ia_dstaddr.sin6_addr)) {
1032 if ((ia->ia_flags & IFA_ROUTE) &&
1033 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
1035 log(LOG_ERR, "in6_update_ifa: failed to remove "
1036 "a route to the old destination: %s\n",
1037 ip6_sprintf(&ia->ia_addr.sin6_addr));
1038 /* proceed anyway... */
1041 ia->ia_flags &= ~IFA_ROUTE;
1042 ia->ia_dstaddr = dst6;
1045 /* reset the interface and routing table appropriately. */
1046 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
1050 * Beyond this point, we should call in6_purgeaddr upon an error,
1051 * not just go to unlink.
1054 if (ifp->if_flags & IFF_MULTICAST) {
1055 struct sockaddr_in6 mltaddr, mltmask;
1056 struct in6_multi *in6m;
1060 * join solicited multicast addr for new host id
1062 struct in6_addr llsol;
1063 bzero(&llsol, sizeof(struct in6_addr));
1064 llsol.s6_addr16[0] = htons(0xff02);
1065 llsol.s6_addr16[1] = htons(ifp->if_index);
1066 llsol.s6_addr32[1] = 0;
1067 llsol.s6_addr32[2] = htonl(1);
1068 llsol.s6_addr32[3] =
1069 ifra->ifra_addr.sin6_addr.s6_addr32[3];
1070 llsol.s6_addr8[12] = 0xff;
1071 in6_addmulti(&llsol, ifp, &error);
1074 "in6_update_ifa: addmulti failed for "
1075 "%s on %s (errno=%d)\n",
1076 ip6_sprintf(&llsol), if_name(ifp),
1078 in6_purgeaddr((struct ifaddr *)ia);
1083 bzero(&mltmask, sizeof(mltmask));
1084 mltmask.sin6_len = sizeof(struct sockaddr_in6);
1085 mltmask.sin6_family = AF_INET6;
1086 mltmask.sin6_addr = in6mask32;
1089 * join link-local all-nodes address
1091 bzero(&mltaddr, sizeof(mltaddr));
1092 mltaddr.sin6_len = sizeof(struct sockaddr_in6);
1093 mltaddr.sin6_family = AF_INET6;
1094 mltaddr.sin6_addr = kin6addr_linklocal_allnodes;
1095 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
1097 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
1099 rtrequest_global(RTM_ADD,
1100 (struct sockaddr *)&mltaddr,
1101 (struct sockaddr *)&ia->ia_addr,
1102 (struct sockaddr *)&mltmask,
1103 RTF_UP|RTF_CLONING); /* xxx */
1104 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1107 "in6_update_ifa: addmulti failed for "
1108 "%s on %s (errno=%d)\n",
1109 ip6_sprintf(&mltaddr.sin6_addr),
1110 if_name(ifp), error);
1115 * join node information group address
1117 #define hostnamelen strlen(hostname)
1118 if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr)
1120 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
1121 if (in6m == NULL && ia != NULL) {
1122 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1124 log(LOG_WARNING, "in6_update_ifa: "
1125 "addmulti failed for "
1126 "%s on %s (errno=%d)\n",
1127 ip6_sprintf(&mltaddr.sin6_addr),
1128 if_name(ifp), error);
1135 * join node-local all-nodes address, on loopback.
1136 * XXX: since "node-local" is obsoleted by interface-local,
1137 * we have to join the group on every interface with
1138 * some interface-boundary restriction.
1140 if (ifp->if_flags & IFF_LOOPBACK) {
1141 struct in6_ifaddr *ia_loop;
1143 struct in6_addr loop6 = kin6addr_loopback;
1144 ia_loop = in6ifa_ifpwithaddr(ifp, &loop6);
1146 mltaddr.sin6_addr = kin6addr_nodelocal_allnodes;
1148 in6m = IN6_LOOKUP_MULTI(&mltaddr.sin6_addr, ifp);
1149 if (in6m == NULL && ia_loop != NULL) {
1150 rtrequest_global(RTM_ADD,
1151 (struct sockaddr *)&mltaddr,
1152 (struct sockaddr *)&ia_loop->ia_addr,
1153 (struct sockaddr *)&mltmask,
1155 in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
1157 log(LOG_WARNING, "in6_update_ifa: "
1158 "addmulti failed for %s on %s "
1160 ip6_sprintf(&mltaddr.sin6_addr),
1161 if_name(ifp), error);
1167 ia->ia6_flags = ifra->ifra_flags;
1168 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/
1169 ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */
1171 ia->ia6_lifetime = ifra->ifra_lifetime;
1173 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1174 ia->ia6_lifetime.ia6t_expire =
1175 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1177 ia->ia6_lifetime.ia6t_expire = 0;
1178 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1179 ia->ia6_lifetime.ia6t_preferred =
1180 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1182 ia->ia6_lifetime.ia6t_preferred = 0;
1185 * Perform DAD, if needed.
1186 * XXX It may be of use, if we can administratively
1189 if (in6if_do_dad(ifp) && !(ifra->ifra_flags & IN6_IFF_NODAD)) {
1190 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1191 nd6_dad_start((struct ifaddr *)ia, NULL);
1198 * XXX: if a change of an existing address failed, keep the entry
1202 in6_unlink_ifa(ia, ifp);
1207 in6_purgeaddr(struct ifaddr *ifa)
1209 struct ifnet *ifp = ifa->ifa_ifp;
1210 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1212 /* stop DAD processing */
1216 * delete route to the destination of the address being purged.
1217 * The interface must be p2p or loopback in this case.
1219 if ((ia->ia_flags & IFA_ROUTE) && ia->ia_dstaddr.sin6_len != 0) {
1222 if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
1224 log(LOG_ERR, "in6_purgeaddr: failed to remove "
1225 "a route to the p2p destination: %s on %s, "
1227 ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp),
1229 /* proceed anyway... */
1232 ia->ia_flags &= ~IFA_ROUTE;
1235 /* Remove ownaddr's loopback rtentry, if it exists. */
1236 in6_ifremloop(&(ia->ia_ifa));
1238 if (ifp->if_flags & IFF_MULTICAST) {
1240 * delete solicited multicast addr for deleting host id
1242 struct in6_multi *in6m;
1243 struct in6_addr llsol;
1244 bzero(&llsol, sizeof(struct in6_addr));
1245 llsol.s6_addr16[0] = htons(0xff02);
1246 llsol.s6_addr16[1] = htons(ifp->if_index);
1247 llsol.s6_addr32[1] = 0;
1248 llsol.s6_addr32[2] = htonl(1);
1249 llsol.s6_addr32[3] =
1250 ia->ia_addr.sin6_addr.s6_addr32[3];
1251 llsol.s6_addr8[12] = 0xff;
1253 in6m = IN6_LOOKUP_MULTI(&llsol, ifp);
1258 in6_unlink_ifa(ia, ifp);
1262 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1264 struct in6_ifaddr *oia;
1268 ifa_ifunlink(&ia->ia_ifa, ifp);
1271 if (oia == (ia = in6_ifaddr))
1272 in6_ifaddr = ia->ia_next;
1274 while (ia->ia_next && (ia->ia_next != oia))
1277 ia->ia_next = oia->ia_next;
1280 kprintf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
1285 * When an autoconfigured address is being removed, release the
1286 * reference to the base prefix. Also, since the release might
1287 * affect the status of other (detached) addresses, call
1288 * pfxlist_onlink_check().
1290 if (oia->ia6_flags & IN6_IFF_AUTOCONF) {
1291 if (oia->ia6_ndpr == NULL) {
1292 log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address "
1293 "%p has no prefix\n", oia);
1295 oia->ia6_ndpr->ndpr_refcnt--;
1296 oia->ia6_flags &= ~IN6_IFF_AUTOCONF;
1297 oia->ia6_ndpr = NULL;
1300 pfxlist_onlink_check();
1304 * release another refcnt for the link from in6_ifaddr.
1305 * Note that we should decrement the refcnt at least once for all *BSD.
1307 ifa_destroy(&oia->ia_ifa);
1313 in6_purgeif(struct ifnet *ifp)
1315 struct ifaddr_container *ifac, *next;
1317 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid],
1319 if (ifac->ifa->ifa_addr->sa_family != AF_INET6)
1321 in6_purgeaddr(ifac->ifa);
1329 * SIOCGLIFADDR: get first address. (?)
1330 * SIOCGLIFADDR with IFLR_PREFIX:
1331 * get first address that matches the specified prefix.
1332 * SIOCALIFADDR: add the specified address.
1333 * SIOCALIFADDR with IFLR_PREFIX:
1334 * add the specified prefix, filling hostid part from
1335 * the first link-local address. prefixlen must be <= 64.
1336 * SIOCDLIFADDR: delete the specified address.
1337 * SIOCDLIFADDR with IFLR_PREFIX:
1338 * delete the first address that matches the specified prefix.
1340 * EINVAL on invalid parameters
1341 * EADDRNOTAVAIL on prefix match failed/specified address not found
1342 * other values may be returned from in6_ioctl()
1344 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64.
1345 * this is to accomodate address naming scheme other than RFC2374,
1347 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374
1348 * address encoding scheme. (see figure on page 8)
1351 in6_lifaddr_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp,
1354 struct if_laddrreq *iflr = (struct if_laddrreq *)data;
1355 struct sockaddr *sa;
1358 if (!data || !ifp) {
1359 panic("invalid argument to in6_lifaddr_ioctl");
1365 /* address must be specified on GET with IFLR_PREFIX */
1366 if (!(iflr->flags & IFLR_PREFIX))
1371 /* address must be specified on ADD and DELETE */
1372 sa = (struct sockaddr *)&iflr->addr;
1373 if (sa->sa_family != AF_INET6)
1375 if (sa->sa_len != sizeof(struct sockaddr_in6))
1377 /* XXX need improvement */
1378 sa = (struct sockaddr *)&iflr->dstaddr;
1379 if (sa->sa_family && sa->sa_family != AF_INET6)
1381 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
1384 default: /* shouldn't happen */
1386 panic("invalid cmd to in6_lifaddr_ioctl");
1392 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
1398 struct in6_aliasreq ifra;
1399 struct in6_addr *hostid = NULL;
1402 if (iflr->flags & IFLR_PREFIX) {
1404 struct sockaddr_in6 *sin6;
1407 * hostid is to fill in the hostid part of the
1408 * address. hostid points to the first link-local
1409 * address attached to the interface.
1411 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
1413 return EADDRNOTAVAIL;
1414 hostid = IFA_IN6(ifa);
1416 /* prefixlen must be <= 64. */
1417 if (64 < iflr->prefixlen)
1419 prefixlen = iflr->prefixlen;
1421 /* hostid part must be zero. */
1422 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1423 if (sin6->sin6_addr.s6_addr32[2] != 0
1424 || sin6->sin6_addr.s6_addr32[3] != 0) {
1428 prefixlen = iflr->prefixlen;
1430 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */
1431 bzero(&ifra, sizeof(ifra));
1432 bcopy(iflr->iflr_name, ifra.ifra_name,
1433 sizeof(ifra.ifra_name));
1435 bcopy(&iflr->addr, &ifra.ifra_addr,
1436 ((struct sockaddr *)&iflr->addr)->sa_len);
1438 /* fill in hostid part */
1439 ifra.ifra_addr.sin6_addr.s6_addr32[2] =
1440 hostid->s6_addr32[2];
1441 ifra.ifra_addr.sin6_addr.s6_addr32[3] =
1442 hostid->s6_addr32[3];
1445 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /*XXX*/
1446 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
1447 ((struct sockaddr *)&iflr->dstaddr)->sa_len);
1449 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
1450 hostid->s6_addr32[2];
1451 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
1452 hostid->s6_addr32[3];
1456 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
1457 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
1459 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
1460 return in6_control_internal(SIOCAIFADDR_IN6, (caddr_t)&ifra,
1466 struct ifaddr_container *ifac;
1467 struct in6_ifaddr *ia;
1468 struct in6_addr mask, candidate, match;
1469 struct sockaddr_in6 *sin6;
1472 bzero(&mask, sizeof(mask));
1473 if (iflr->flags & IFLR_PREFIX) {
1474 /* lookup a prefix rather than address. */
1475 in6_prefixlen2mask(&mask, iflr->prefixlen);
1477 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1478 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1479 match.s6_addr32[0] &= mask.s6_addr32[0];
1480 match.s6_addr32[1] &= mask.s6_addr32[1];
1481 match.s6_addr32[2] &= mask.s6_addr32[2];
1482 match.s6_addr32[3] &= mask.s6_addr32[3];
1484 /* if you set extra bits, that's wrong */
1485 if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
1490 if (cmd == SIOCGLIFADDR) {
1491 /* on getting an address, take the 1st match */
1494 /* on deleting an address, do exact match */
1495 in6_prefixlen2mask(&mask, 128);
1496 sin6 = (struct sockaddr_in6 *)&iflr->addr;
1497 bcopy(&sin6->sin6_addr, &match, sizeof(match));
1503 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1504 struct ifaddr *ifa = ifac->ifa;
1506 if (ifa->ifa_addr->sa_family != AF_INET6)
1511 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
1513 * XXX: this is adhoc, but is necessary to allow
1514 * a user to specify fe80::/64 (not /10) for a
1515 * link-local address.
1517 if (IN6_IS_ADDR_LINKLOCAL(&candidate))
1518 candidate.s6_addr16[1] = 0;
1519 candidate.s6_addr32[0] &= mask.s6_addr32[0];
1520 candidate.s6_addr32[1] &= mask.s6_addr32[1];
1521 candidate.s6_addr32[2] &= mask.s6_addr32[2];
1522 candidate.s6_addr32[3] &= mask.s6_addr32[3];
1523 if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
1527 return EADDRNOTAVAIL;
1528 ia = ifa2ia6(ifac->ifa);
1530 if (cmd == SIOCGLIFADDR) {
1531 struct sockaddr_in6 *s6;
1533 /* fill in the if_laddrreq structure */
1534 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
1535 s6 = (struct sockaddr_in6 *)&iflr->addr;
1536 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1537 s6->sin6_addr.s6_addr16[1] = 0;
1539 in6_addr2scopeid(ifp, &s6->sin6_addr);
1541 if (ifp->if_flags & IFF_POINTOPOINT) {
1542 bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
1543 ia->ia_dstaddr.sin6_len);
1544 s6 = (struct sockaddr_in6 *)&iflr->dstaddr;
1545 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
1546 s6->sin6_addr.s6_addr16[1] = 0;
1548 in6_addr2scopeid(ifp,
1552 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
1555 in6_mask2len(&ia->ia_prefixmask.sin6_addr,
1558 iflr->flags = ia->ia6_flags; /* XXX */
1562 struct in6_aliasreq ifra;
1564 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */
1565 bzero(&ifra, sizeof(ifra));
1566 bcopy(iflr->iflr_name, ifra.ifra_name,
1567 sizeof(ifra.ifra_name));
1569 bcopy(&ia->ia_addr, &ifra.ifra_addr,
1570 ia->ia_addr.sin6_len);
1571 if (ifp->if_flags & IFF_POINTOPOINT)
1572 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
1573 ia->ia_dstaddr.sin6_len);
1575 bzero(&ifra.ifra_dstaddr,
1576 sizeof(ifra.ifra_dstaddr));
1577 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
1578 ia->ia_prefixmask.sin6_len);
1580 ifra.ifra_flags = ia->ia6_flags;
1581 return in6_control_internal(SIOCDIFADDR_IN6,
1582 (caddr_t)&ifra, ifp, td);
1587 return EOPNOTSUPP; /* just for safety */
1591 * Initialize an interface's intetnet6 address
1592 * and routing table entry.
1595 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, struct sockaddr_in6 *sin6,
1598 int error = 0, plen;
1600 ia->ia_addr = *sin6;
1602 if (ifp->if_ioctl != NULL) {
1603 ifnet_serialize_all(ifp);
1604 error = ifp->if_ioctl(ifp, SIOCSIFADDR, (caddr_t)ia, NULL);
1605 ifnet_deserialize_all(ifp);
1610 ia->ia_ifa.ifa_metric = ifp->if_metric;
1612 /* we could do in(6)_socktrim here, but just omit it at this moment. */
1616 * If the destination address is specified for a point-to-point
1617 * interface, install a route to the destination as an interface
1620 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1621 if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) {
1622 if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD,
1623 RTF_UP | RTF_HOST)) != 0)
1625 ia->ia_flags |= IFA_ROUTE;
1629 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto().
1631 ia->ia_ifa.ifa_flags |= RTF_CLONING;
1634 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
1636 /* set the rtrequest function to create llinfo */
1637 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
1638 in6_ifaddloop(&(ia->ia_ifa));
1644 struct in6_multi_mship *
1645 in6_joingroup(struct ifnet *ifp, struct in6_addr *addr, int *errorp)
1647 struct in6_multi_mship *imm;
1649 imm = kmalloc(sizeof(*imm), M_IPMADDR, M_NOWAIT);
1654 imm->i6mm_maddr = in6_addmulti(addr, ifp, errorp);
1655 if (!imm->i6mm_maddr) {
1656 /* *errorp is alrady set */
1657 kfree(imm, M_IPMADDR);
1664 in6_leavegroup(struct in6_multi_mship *imm)
1667 if (imm->i6mm_maddr)
1668 in6_delmulti(imm->i6mm_maddr);
1669 kfree(imm, M_IPMADDR);
1674 * Add an address to the list of IP6 multicast addresses for a
1678 in6_addmulti(struct in6_addr *maddr6, struct ifnet *ifp, int *errorp)
1680 struct in6_multi *in6m;
1681 struct sockaddr_in6 sin6;
1682 struct ifmultiaddr *ifma;
1689 * Call generic routine to add membership or increment
1690 * refcount. It wants addresses in the form of a sockaddr,
1691 * so we build one here (being careful to zero the unused bytes).
1693 bzero(&sin6, sizeof sin6);
1694 sin6.sin6_family = AF_INET6;
1695 sin6.sin6_len = sizeof sin6;
1696 sin6.sin6_addr = *maddr6;
1697 *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma);
1704 * If ifma->ifma_protospec is null, then if_addmulti() created
1705 * a new record. Otherwise, we are done.
1707 if (ifma->ifma_protospec != NULL) {
1709 return ifma->ifma_protospec;
1712 in6m = kmalloc(sizeof(*in6m), M_IPMADDR, M_INTWAIT | M_ZERO);
1713 in6m->in6m_addr = *maddr6;
1714 in6m->in6m_ifp = ifp;
1715 in6m->in6m_ifma = ifma;
1716 ifma->ifma_protospec = in6m;
1717 LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry);
1720 * Let MLD6 know that we have joined a new IP6 multicast
1723 mld6_start_listening(in6m);
1729 * Delete a multicast address record.
1732 in6_delmulti(struct in6_multi *in6m)
1734 struct ifmultiaddr *ifma = in6m->in6m_ifma;
1738 if (ifma->ifma_refcount == 1) {
1740 * No remaining claims to this record; let MLD6 know
1741 * that we are leaving the multicast group.
1743 mld6_stop_listening(in6m);
1744 ifma->ifma_protospec = NULL;
1745 LIST_REMOVE(in6m, in6m_entry);
1746 kfree(in6m, M_IPMADDR);
1748 /* XXX - should be separate API for when we have an ifma? */
1749 if_delmulti(ifma->ifma_ifp, ifma->ifma_addr);
1754 * Find an IPv6 interface link-local address specific to an interface.
1757 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1759 const struct ifaddr_container *ifac;
1761 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1762 struct ifaddr *ifa = ifac->ifa;
1764 if (ifa->ifa_addr == NULL)
1765 continue; /* just for safety */
1766 if (ifa->ifa_addr->sa_family != AF_INET6)
1768 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1769 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1772 return (struct in6_ifaddr *)ifa;
1780 * find the internet address corresponding to a given interface and address.
1783 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr)
1785 const struct ifaddr_container *ifac;
1787 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1788 struct ifaddr *ifa = ifac->ifa;
1790 if (ifa->ifa_addr == NULL)
1791 continue; /* just for safety */
1792 if (ifa->ifa_addr->sa_family != AF_INET6)
1794 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa)))
1795 return (struct in6_ifaddr *)ifa;
1801 * Find a link-local scoped address on ifp and return it if any.
1804 in6ifa_llaonifp(struct ifnet *ifp)
1806 const struct ifaddr_container *ifac;
1808 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1809 const struct sockaddr_in6 *sin6;
1810 struct ifaddr *ifa = ifac->ifa;
1812 if (ifa->ifa_addr->sa_family != AF_INET6)
1814 sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr;
1815 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1816 /* XXX why are mcast addresses ifp address list? */
1817 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1818 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1819 return (struct in6_ifaddr *)ifa;
1825 * find the internet address on a given interface corresponding to a neighbor's
1829 in6ifa_ifplocaladdr(const struct ifnet *ifp, const struct in6_addr *addr)
1832 struct in6_ifaddr *ia;
1833 struct ifaddr_container *ifac;
1835 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1838 if (ifa->ifa_addr == NULL)
1839 continue; /* just for safety */
1840 if (ifa->ifa_addr->sa_family != AF_INET6)
1842 ia = (struct in6_ifaddr *)ifa;
1843 if (IN6_ARE_MASKED_ADDR_EQUAL(addr,
1844 &ia->ia_addr.sin6_addr,
1845 &ia->ia_prefixmask.sin6_addr))
1853 * Convert IP6 address to printable (loggable) representation.
1855 static char digits[] = "0123456789abcdef";
1856 static int ip6round = 0;
1858 ip6_sprintf(const struct in6_addr *addr)
1860 static char ip6buf[8][48];
1863 const u_short *a = (const u_short *)addr;
1867 ip6round = (ip6round + 1) & 7;
1868 cp = ip6buf[ip6round];
1870 for (i = 0; i < 8; i++) {
1881 if (dcolon == 0 && *(a + 1) == 0) {
1893 d = (const u_char *)a;
1894 *cp++ = digits[*d >> 4];
1895 *cp++ = digits[*d++ & 0xf];
1896 *cp++ = digits[*d >> 4];
1897 *cp++ = digits[*d & 0xf];
1902 return (ip6buf[ip6round]);
1906 in6_localaddr(struct in6_addr *in6)
1908 struct in6_ifaddr *ia;
1910 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1913 for (ia = in6_ifaddr; ia; ia = ia->ia_next)
1914 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1915 &ia->ia_prefixmask.sin6_addr))
1922 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1924 struct in6_ifaddr *ia;
1926 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
1927 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
1929 (ia->ia6_flags & IN6_IFF_DEPRECATED))
1930 return (1); /* true */
1932 /* XXX: do we still have to go thru the rest of the list? */
1935 return (0); /* false */
1939 * return length of part which dst and src are equal
1943 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1946 u_char *s = (u_char *)src, *d = (u_char *)dst;
1947 u_char *lim = s + 16, r;
1950 if ((r = (*d++ ^ *s++)) != 0) {
1961 /* XXX: to be scope conscious */
1963 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1965 int bytelen, bitlen;
1968 if (0 > len || len > 128) {
1969 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1977 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1979 if (p1->s6_addr[bytelen] >> (8 - bitlen) !=
1980 p2->s6_addr[bytelen] >> (8 - bitlen))
1987 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1989 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1990 int bytelen, bitlen, i;
1993 if (0 > len || len > 128) {
1994 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1999 bzero(maskp, sizeof(*maskp));
2002 for (i = 0; i < bytelen; i++)
2003 maskp->s6_addr[i] = 0xff;
2005 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
2009 * return the best address out of the same scope
2012 in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst, struct ucred *cred)
2014 int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0;
2016 struct in6_ifaddr *ifa_best = NULL;
2018 const struct ifnet_array *arr;
2021 if(cred && cred->cr_prison)
2026 kprintf("in6_ifawithscope: output interface is not specified\n");
2032 * We search for all addresses on all interfaces from the beginning.
2033 * Comparing an interface with the outgoing interface will be done
2034 * only at the final stage of tiebreaking.
2036 arr = ifnet_array_get();
2037 for (i = 0; i < arr->ifnet_count; ++i) {
2038 struct ifnet *ifp = arr->ifnet_arr[i];
2039 struct ifaddr_container *ifac;
2042 * We can never take an address that breaks the scope zone
2043 * of the destination.
2045 if (ifp->if_afdata[AF_INET6] == NULL)
2047 if (in6_addr2scopeid(ifp, dst) != in6_addr2scopeid(oifp, dst))
2050 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2051 int tlen = -1, dscopecmp, bscopecmp, matchcmp;
2052 struct ifaddr *ifa = ifac->ifa;
2054 if (ifa->ifa_addr->sa_family != AF_INET6)
2057 src_scope = in6_addrscope(IFA_IN6(ifa));
2060 * Don't use an address before completing DAD
2061 * nor a duplicated address.
2063 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2067 /* XXX: is there any case to allow anycasts? */
2068 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2072 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2076 /* Skip adresses not valid for current jail */
2078 !(jailed_ip(cred->cr_prison, (struct sockaddr *)(ifa->ifa_addr)) != 0))
2082 * If this is the first address we find,
2085 if (ifa_best == NULL)
2089 * ifa_best is never NULL beyond this line except
2090 * within the block labeled "replace".
2094 * If ifa_best has a smaller scope than dst and
2095 * the current address has a larger one than
2096 * (or equal to) dst, always replace ifa_best.
2097 * Also, if the current address has a smaller scope
2098 * than dst, ignore it unless ifa_best also has a
2100 * Consequently, after the two if-clause below,
2101 * the followings must be satisfied:
2102 * (scope(src) < scope(dst) &&
2103 * scope(best) < scope(dst))
2105 * (scope(best) >= scope(dst) &&
2106 * scope(src) >= scope(dst))
2108 if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 &&
2109 IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0)
2110 goto replace; /* (A) */
2111 if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 &&
2112 IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0)
2116 * A deprecated address SHOULD NOT be used in new
2117 * communications if an alternate (non-deprecated)
2118 * address is available and has sufficient scope.
2119 * RFC 2462, Section 5.5.4.
2121 if (((struct in6_ifaddr *)ifa)->ia6_flags &
2122 IN6_IFF_DEPRECATED) {
2124 * Ignore any deprecated addresses if
2125 * specified by configuration.
2127 if (!ip6_use_deprecated)
2131 * If we have already found a non-deprecated
2132 * candidate, just ignore deprecated addresses.
2134 if (!(ifa_best->ia6_flags & IN6_IFF_DEPRECATED))
2139 * A non-deprecated address is always preferred
2140 * to a deprecated one regardless of scopes and
2141 * address matching (Note invariants ensured by the
2142 * conditions (A) and (B) above.)
2144 if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) &&
2145 !(((struct in6_ifaddr *)ifa)->ia6_flags &
2146 IN6_IFF_DEPRECATED))
2150 * When we use temporary addresses described in
2151 * RFC 3041, we prefer temporary addresses to
2152 * public autoconf addresses. Again, note the
2153 * invariants from (A) and (B). Also note that we
2154 * don't have any preference between static addresses
2155 * and autoconf addresses (despite of whether or not
2156 * the latter is temporary or public.)
2158 if (ip6_use_tempaddr) {
2159 struct in6_ifaddr *ifat;
2161 ifat = (struct in6_ifaddr *)ifa;
2162 if ((ifa_best->ia6_flags &
2163 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2164 == IN6_IFF_AUTOCONF &&
2166 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2167 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) {
2170 if ((ifa_best->ia6_flags &
2171 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2172 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) &&
2174 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
2175 == IN6_IFF_AUTOCONF) {
2181 * At this point, we have two cases:
2182 * 1. we are looking at a non-deprecated address,
2183 * and ifa_best is also non-deprecated.
2184 * 2. we are looking at a deprecated address,
2185 * and ifa_best is also deprecated.
2186 * Also, we do not have to consider a case where
2187 * the scope of if_best is larger(smaller) than dst and
2188 * the scope of the current address is smaller(larger)
2189 * than dst. Such a case has already been covered.
2190 * Tiebreaking is done according to the following
2192 * - the scope comparison between the address and
2194 * - the scope comparison between the address and
2195 * ifa_best (bscopecmp)
2196 * - if the address match dst longer than ifa_best
2198 * - if the address is on the outgoing I/F (outI/F)
2200 * Roughly speaking, the selection policy is
2201 * - the most important item is scope. The same scope
2202 * is best. Then search for a larger scope.
2203 * Smaller scopes are the last resort.
2204 * - A deprecated address is chosen only when we have
2205 * no address that has an enough scope, but is
2206 * prefered to any addresses of smaller scopes
2207 * (this must be already done above.)
2208 * - addresses on the outgoing I/F are preferred to
2209 * ones on other interfaces if none of above
2210 * tiebreaks. In the table below, the column "bI"
2211 * means if the best_ifa is on the outgoing
2212 * interface, and the column "sI" means if the ifa
2213 * is on the outgoing interface.
2214 * - If there is no other reasons to choose one,
2215 * longest address match against dst is considered.
2217 * The precise decision table is as follows:
2218 * dscopecmp bscopecmp match bI oI | replace?
2219 * N/A equal N/A Y N | No (1)
2220 * N/A equal N/A N Y | Yes (2)
2221 * N/A equal larger N/A | Yes (3)
2222 * N/A equal !larger N/A | No (4)
2223 * larger larger N/A N/A | No (5)
2224 * larger smaller N/A N/A | Yes (6)
2225 * smaller larger N/A N/A | Yes (7)
2226 * smaller smaller N/A N/A | No (8)
2227 * equal smaller N/A N/A | Yes (9)
2228 * equal larger (already done at A above)
2230 dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope);
2231 bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope);
2233 if (bscopecmp == 0) {
2234 struct ifnet *bifp = ifa_best->ia_ifp;
2236 if (bifp == oifp && ifp != oifp) /* (1) */
2238 if (bifp != oifp && ifp == oifp) /* (2) */
2242 * Both bifp and ifp are on the outgoing
2243 * interface, or both two are on a different
2244 * interface from the outgoing I/F.
2245 * now we need address matching against dst
2248 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2249 matchcmp = tlen - blen;
2250 if (matchcmp > 0) /* (3) */
2254 if (dscopecmp > 0) {
2255 if (bscopecmp > 0) /* (5) */
2257 goto replace; /* (6) */
2259 if (dscopecmp < 0) {
2260 if (bscopecmp > 0) /* (7) */
2265 /* now dscopecmp must be 0 */
2267 goto replace; /* (9) */
2270 ifa_best = (struct in6_ifaddr *)ifa;
2271 blen = tlen >= 0 ? tlen :
2272 in6_matchlen(IFA_IN6(ifa), dst);
2273 best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr);
2277 /* count statistics for future improvements */
2278 if (ifa_best == NULL)
2279 ip6stat.ip6s_sources_none++;
2281 if (oifp == ifa_best->ia_ifp)
2282 ip6stat.ip6s_sources_sameif[best_scope]++;
2284 ip6stat.ip6s_sources_otherif[best_scope]++;
2286 if (best_scope == dst_scope)
2287 ip6stat.ip6s_sources_samescope[best_scope]++;
2289 ip6stat.ip6s_sources_otherscope[best_scope]++;
2291 if (ifa_best->ia6_flags & IN6_IFF_DEPRECATED)
2292 ip6stat.ip6s_sources_deprecated[best_scope]++;
2299 * return the best address out of the same scope. if no address was
2300 * found, return the first valid address from designated IF.
2303 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
2305 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
2306 struct ifaddr_container *ifac;
2307 struct in6_ifaddr *besta = NULL;
2308 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
2310 dep[0] = dep[1] = NULL;
2313 * We first look for addresses in the same scope.
2314 * If there is one, return it.
2315 * If two or more, return one which matches the dst longest.
2316 * If none, return one of global addresses assigned other ifs.
2318 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2319 struct ifaddr *ifa = ifac->ifa;
2321 if (ifa->ifa_addr->sa_family != AF_INET6)
2323 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2324 continue; /* XXX: is there any case to allow anycast? */
2325 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2326 continue; /* don't use this interface */
2327 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2329 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2330 if (ip6_use_deprecated)
2331 dep[0] = (struct in6_ifaddr *)ifa;
2335 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
2337 * call in6_matchlen() as few as possible
2341 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
2342 tlen = in6_matchlen(IFA_IN6(ifa), dst);
2345 besta = (struct in6_ifaddr *)ifa;
2348 besta = (struct in6_ifaddr *)ifa;
2354 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2355 struct ifaddr *ifa = ifac->ifa;
2357 if (ifa->ifa_addr->sa_family != AF_INET6)
2359 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
2360 continue; /* XXX: is there any case to allow anycast? */
2361 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
2362 continue; /* don't use this interface */
2363 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2365 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2366 if (ip6_use_deprecated)
2367 dep[1] = (struct in6_ifaddr *)ifa;
2371 return (struct in6_ifaddr *)ifa;
2374 /* use the last-resort values, that are, deprecated addresses */
2384 * perform DAD when interface becomes IFF_UP.
2387 in6_if_up_dispatch(netmsg_t nmsg)
2389 struct lwkt_msg *lmsg = &nmsg->lmsg;
2390 struct ifnet *ifp = lmsg->u.ms_resultp;
2391 struct ifaddr_container *ifac;
2392 struct in6_ifaddr *ia;
2393 int dad_delay; /* delay ticks before DAD output */
2395 ASSERT_IN_NETISR(0);
2398 * special cases, like 6to4, are handled in in6_ifattach
2400 in6_ifattach(ifp, NULL);
2403 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2404 struct ifaddr *ifa = ifac->ifa;
2406 if (ifa->ifa_addr->sa_family != AF_INET6)
2408 ia = (struct in6_ifaddr *)ifa;
2409 if (ia->ia6_flags & IN6_IFF_TENTATIVE)
2410 nd6_dad_start(ifa, &dad_delay);
2413 lwkt_replymsg(lmsg, 0);
2417 in6_if_up(struct ifnet *ifp)
2419 struct netmsg_base nmsg;
2420 struct lwkt_msg *lmsg = &nmsg.lmsg;
2422 ASSERT_CANDOMSG_NETISR0(curthread);
2424 netmsg_init(&nmsg, NULL, &curthread->td_msgport, 0, in6_if_up_dispatch);
2425 lmsg->u.ms_resultp = ifp;
2426 lwkt_domsg(netisr_cpuport(0), lmsg, 0);
2430 in6if_do_dad(struct ifnet *ifp)
2432 if (ifp->if_flags & IFF_LOOPBACK)
2435 switch (ifp->if_type) {
2441 * These interfaces do not have the IFF_LOOPBACK flag,
2442 * but loop packets back. We do not have to do DAD on such
2443 * interfaces. We should even omit it, because loop-backed
2444 * NS would confuse the DAD procedure.
2449 * Our DAD routine requires the interface up and running.
2450 * However, some interfaces can be up before the RUNNING
2451 * status. Additionaly, users may try to assign addresses
2452 * before the interface becomes up (or running).
2453 * We simply skip DAD in such a case as a work around.
2454 * XXX: we should rather mark "tentative" on such addresses,
2455 * and do DAD after the interface becomes ready.
2457 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) !=
2458 (IFF_UP|IFF_RUNNING))
2466 * Calculate max IPv6 MTU through all the interfaces and store it
2472 unsigned long maxmtu = 0;
2473 const struct ifnet_array *arr;
2476 ASSERT_IN_NETISR(0);
2478 arr = ifnet_array_get();
2479 for (i = 0; i < arr->ifnet_count; ++i) {
2480 struct ifnet *ifp = arr->ifnet_arr[i];
2482 /* this function can be called during ifnet initialization */
2483 if (ifp->if_afdata[AF_INET6] == NULL)
2485 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2486 IN6_LINKMTU(ifp) > maxmtu)
2487 maxmtu = IN6_LINKMTU(ifp);
2489 if (maxmtu) /* update only when maxmtu is positive */
2490 in6_maxmtu = maxmtu;
2494 in6_domifattach(struct ifnet *ifp)
2496 struct in6_ifextra *ext;
2498 ext = (struct in6_ifextra *)kmalloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2499 bzero(ext, sizeof(*ext));
2501 ext->in6_ifstat = (struct in6_ifstat *)kmalloc(sizeof(struct in6_ifstat),
2502 M_IFADDR, M_WAITOK);
2503 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat));
2506 (struct icmp6_ifstat *)kmalloc(sizeof(struct icmp6_ifstat),
2507 M_IFADDR, M_WAITOK);
2508 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat));
2510 ext->nd_ifinfo = nd6_ifattach(ifp);
2511 ext->scope6_id = scope6_ifattach(ifp);
2516 in6_domifdetach(struct ifnet *ifp, void *aux)
2518 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2519 scope6_ifdetach(ext->scope6_id);
2520 nd6_ifdetach(ext->nd_ifinfo);
2521 kfree(ext->in6_ifstat, M_IFADDR);
2522 kfree(ext->icmp6_ifstat, M_IFADDR);
2523 kfree(ext, M_IFADDR);