2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $
35 * Copyright (c) 1982, 1986, 1991, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * @(#)in.c 8.2 (Berkeley) 11/15/93
65 #include <sys/cdefs.h>
66 __FBSDID("$FreeBSD$");
69 #include "opt_inet6.h"
71 #include <sys/param.h>
72 #include <sys/eventhandler.h>
73 #include <sys/errno.h>
75 #include <sys/malloc.h>
76 #include <sys/socket.h>
77 #include <sys/socketvar.h>
78 #include <sys/sockio.h>
79 #include <sys/systm.h>
82 #include <sys/protosw.h>
84 #include <sys/kernel.h>
86 #include <sys/rmlock.h>
87 #include <sys/syslog.h>
90 #include <net/if_var.h>
91 #include <net/if_types.h>
92 #include <net/route.h>
93 #include <net/if_dl.h>
96 #include <netinet/in.h>
97 #include <netinet/in_var.h>
98 #include <net/if_llatbl.h>
99 #include <netinet/if_ether.h>
100 #include <netinet/in_systm.h>
101 #include <netinet/ip.h>
102 #include <netinet/in_pcb.h>
103 #include <netinet/ip_carp.h>
105 #include <netinet/ip6.h>
106 #include <netinet6/ip6_var.h>
107 #include <netinet6/nd6.h>
108 #include <netinet6/mld6_var.h>
109 #include <netinet6/ip6_mroute.h>
110 #include <netinet6/in6_ifattach.h>
111 #include <netinet6/scope6_var.h>
112 #include <netinet6/in6_fib.h>
113 #include <netinet6/in6_pcb.h>
117 * struct in6_ifreq and struct ifreq must be type punnable for common members
118 * of ifr_ifru to allow accessors to be shared.
120 _Static_assert(offsetof(struct in6_ifreq, ifr_ifru) ==
121 offsetof(struct ifreq, ifr_ifru),
122 "struct in6_ifreq and struct ifreq are not type punnable");
124 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
125 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
128 * Definitions of some costant IP6 addresses.
130 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
131 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
132 const struct in6_addr in6addr_nodelocal_allnodes =
133 IN6ADDR_NODELOCAL_ALLNODES_INIT;
134 const struct in6_addr in6addr_linklocal_allnodes =
135 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
136 const struct in6_addr in6addr_linklocal_allrouters =
137 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
138 const struct in6_addr in6addr_linklocal_allv2routers =
139 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
141 const struct in6_addr in6mask0 = IN6MASK0;
142 const struct in6_addr in6mask32 = IN6MASK32;
143 const struct in6_addr in6mask64 = IN6MASK64;
144 const struct in6_addr in6mask96 = IN6MASK96;
145 const struct in6_addr in6mask128 = IN6MASK128;
147 const struct sockaddr_in6 sa6_any =
148 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
150 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
151 struct in6_aliasreq *, int);
152 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
154 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *,
155 struct in6_ifaddr *, int);
156 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *,
157 struct in6_aliasreq *, int flags);
158 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *,
159 struct in6_ifaddr *, int, int);
160 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
161 struct in6_ifaddr *, int);
163 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
164 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
168 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd)
170 struct sockaddr_dl gateway;
171 struct sockaddr_in6 mask, addr;
176 * initialize for rtmsg generation
178 bzero(&gateway, sizeof(gateway));
179 gateway.sdl_len = sizeof(gateway);
180 gateway.sdl_family = AF_LINK;
182 bzero(&rt, sizeof(rt));
183 rt.rt_gateway = (struct sockaddr *)&gateway;
184 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
185 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
186 rt_mask(&rt) = (struct sockaddr *)&mask;
187 rt_key(&rt) = (struct sockaddr *)&addr;
188 rt.rt_flags = RTF_HOST | RTF_STATIC;
190 rt.rt_flags |= RTF_UP;
191 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ia62ifa(ia)->ifa_ifp->if_fib;
192 /* Announce arrival of local address to this FIB. */
193 rt_newaddrmsg_fib(cmd, &ia->ia_ifa, 0, &rt, fibnum);
197 in6_mask2len(struct in6_addr *mask, u_char *lim0)
200 u_char *lim = lim0, *p;
202 /* ignore the scope_id part */
203 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
204 lim = (u_char *)mask + sizeof(*mask);
205 for (p = (u_char *)mask; p < lim; x++, p++) {
211 for (y = 0; y < 8; y++) {
212 if ((*p & (0x80 >> y)) == 0)
218 * when the limit pointer is given, do a stricter check on the
222 if (y != 0 && (*p & (0x00ff >> y)) != 0)
224 for (p = p + 1; p < lim; p++)
232 #ifdef COMPAT_FREEBSD32
233 struct in6_ndifreq32 {
234 char ifname[IFNAMSIZ];
237 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
241 in6_control(struct socket *so, u_long cmd, caddr_t data,
242 struct ifnet *ifp, struct thread *td)
244 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
245 struct in6_ifaddr *ia = NULL;
246 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
247 struct sockaddr_in6 *sa6;
248 int carp_attached = 0;
253 * Compat to make pre-10.x ifconfig(8) operable.
255 if (cmd == OSIOCAIFADDR_IN6)
256 cmd = SIOCAIFADDR_IN6;
259 case SIOCGETSGCNT_IN6:
260 case SIOCGETMIFCNT_IN6:
262 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
263 * We cannot see how that would be needed, so do not adjust the
264 * KPI blindly; more likely should clean up the IPv4 variant.
266 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
270 case SIOCAADDRCTL_POLICY:
271 case SIOCDADDRCTL_POLICY:
273 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
277 return (in6_src_ioctl(cmd, data));
284 case SIOCSNDFLUSH_IN6:
285 case SIOCSPFXFLUSH_IN6:
286 case SIOCSRTRFLUSH_IN6:
287 case SIOCSDEFIFACE_IN6:
288 case SIOCSIFINFO_FLAGS:
289 case SIOCSIFINFO_IN6:
291 error = priv_check(td, PRIV_NETINET_ND6);
296 case OSIOCGIFINFO_IN6:
297 case SIOCGIFINFO_IN6:
298 case SIOCGNBRINFO_IN6:
299 case SIOCGDEFIFACE_IN6:
300 return (nd6_ioctl(cmd, data, ifp));
302 #ifdef COMPAT_FREEBSD32
303 case SIOCGDEFIFACE32_IN6:
305 struct in6_ndifreq ndif;
306 struct in6_ndifreq32 *ndif32;
308 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
312 ndif32 = (struct in6_ndifreq32 *)data;
313 ndif32->ifindex = ndif.ifindex;
320 case SIOCSIFPREFIX_IN6:
321 case SIOCDIFPREFIX_IN6:
322 case SIOCAIFPREFIX_IN6:
323 case SIOCCIFPREFIX_IN6:
324 case SIOCSGIFPREFIX_IN6:
325 case SIOCGIFPREFIX_IN6:
327 "prefix ioctls are now invalidated. "
328 "please use ifconfig.\n");
335 error = priv_check(td, PRIV_NETINET_SCOPE6);
342 return (scope6_ioctl(cmd, data, ifp));
346 * Find address for this interface, if it exists.
348 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
349 * only, and used the first interface address as the target of other
350 * operations (without checking ifra_addr). This was because netinet
351 * code/API assumed at most 1 interface address per interface.
352 * Since IPv6 allows a node to assign multiple addresses
353 * on a single interface, we almost always look and check the
354 * presence of ifra_addr, and reject invalid ones here.
355 * It also decreases duplicated code among SIOC*_IN6 operations.
358 case SIOCAIFADDR_IN6:
359 case SIOCSIFPHYADDR_IN6:
360 sa6 = &ifra->ifra_addr;
362 case SIOCSIFADDR_IN6:
363 case SIOCGIFADDR_IN6:
364 case SIOCSIFDSTADDR_IN6:
365 case SIOCSIFNETMASK_IN6:
366 case SIOCGIFDSTADDR_IN6:
367 case SIOCGIFNETMASK_IN6:
368 case SIOCDIFADDR_IN6:
369 case SIOCGIFPSRCADDR_IN6:
370 case SIOCGIFPDSTADDR_IN6:
371 case SIOCGIFAFLAG_IN6:
372 case SIOCSNDFLUSH_IN6:
373 case SIOCSPFXFLUSH_IN6:
374 case SIOCSRTRFLUSH_IN6:
375 case SIOCGIFALIFETIME_IN6:
376 case SIOCGIFSTAT_IN6:
377 case SIOCGIFSTAT_ICMP6:
378 sa6 = &ifr->ifr_addr;
385 * Although we should pass any non-INET6 ioctl requests
386 * down to driver, we filter some legacy INET requests.
387 * Drivers trust SIOCSIFADDR et al to come from an already
388 * privileged layer, and do not perform any credentials
389 * checks or input validation.
396 if (sa6 && sa6->sin6_family == AF_INET6) {
397 if (sa6->sin6_scope_id != 0)
398 error = sa6_embedscope(sa6, 0);
400 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
403 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
404 &sa6->sin6_addr)) != 0)
406 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
411 case SIOCSIFADDR_IN6:
412 case SIOCSIFDSTADDR_IN6:
413 case SIOCSIFNETMASK_IN6:
415 * Since IPv6 allows a node to assign multiple addresses
416 * on a single interface, SIOCSIFxxx ioctls are deprecated.
418 /* we decided to obsolete this command (20000704) */
422 case SIOCDIFADDR_IN6:
424 * for IPv4, we look for existing in_ifaddr here to allow
425 * "ifconfig if0 delete" to remove the first IPv4 address on
426 * the interface. For IPv6, as the spec allows multiple
427 * interface address from the day one, we consider "remove the
428 * first one" semantics to be not preferable.
431 error = EADDRNOTAVAIL;
435 case SIOCAIFADDR_IN6:
437 * We always require users to specify a valid IPv6 address for
438 * the corresponding operation.
440 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
441 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
442 error = EAFNOSUPPORT;
447 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
448 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
453 case SIOCGIFSTAT_IN6:
454 case SIOCGIFSTAT_ICMP6:
455 if (ifp->if_afdata[AF_INET6] == NULL) {
456 error = EPFNOSUPPORT;
461 case SIOCGIFADDR_IN6:
462 /* This interface is basically deprecated. use SIOCGIFCONF. */
464 case SIOCGIFAFLAG_IN6:
465 case SIOCGIFNETMASK_IN6:
466 case SIOCGIFDSTADDR_IN6:
467 case SIOCGIFALIFETIME_IN6:
468 /* must think again about its semantics */
470 error = EADDRNOTAVAIL;
477 case SIOCGIFADDR_IN6:
478 ifr->ifr_addr = ia->ia_addr;
479 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
483 case SIOCGIFDSTADDR_IN6:
484 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
488 ifr->ifr_dstaddr = ia->ia_dstaddr;
489 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
493 case SIOCGIFNETMASK_IN6:
494 ifr->ifr_addr = ia->ia_prefixmask;
497 case SIOCGIFAFLAG_IN6:
498 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
501 case SIOCGIFSTAT_IN6:
502 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
503 ifp->if_afdata[AF_INET6])->in6_ifstat,
504 &ifr->ifr_ifru.ifru_stat,
505 sizeof(struct in6_ifstat) / sizeof(uint64_t));
508 case SIOCGIFSTAT_ICMP6:
509 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
510 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
511 &ifr->ifr_ifru.ifru_icmp6stat,
512 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
515 case SIOCGIFALIFETIME_IN6:
516 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
517 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
519 struct in6_addrlifetime *retlt =
520 &ifr->ifr_ifru.ifru_lifetime;
523 * XXX: adjust expiration time assuming time_t is
527 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
528 if (ia->ia6_lifetime.ia6t_vltime <
529 maxexpire - ia->ia6_updatetime) {
530 retlt->ia6t_expire = ia->ia6_updatetime +
531 ia->ia6_lifetime.ia6t_vltime;
533 retlt->ia6t_expire = maxexpire;
535 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
537 struct in6_addrlifetime *retlt =
538 &ifr->ifr_ifru.ifru_lifetime;
541 * XXX: adjust expiration time assuming time_t is
545 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
546 if (ia->ia6_lifetime.ia6t_pltime <
547 maxexpire - ia->ia6_updatetime) {
548 retlt->ia6t_preferred = ia->ia6_updatetime +
549 ia->ia6_lifetime.ia6t_pltime;
551 retlt->ia6t_preferred = maxexpire;
555 case SIOCAIFADDR_IN6:
557 struct nd_prefixctl pr0;
558 struct nd_prefix *pr;
561 * first, make or update the interface address structure,
562 * and link it to the list.
564 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
567 if (ia->ia_ifa.ifa_carp)
568 (*carp_detach_p)(&ia->ia_ifa, true);
569 ifa_free(&ia->ia_ifa);
571 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
574 * this can happen when the user specify the 0 valid
580 if (cmd == ocmd && ifra->ifra_vhid > 0) {
581 if (carp_attach_p != NULL)
582 error = (*carp_attach_p)(&ia->ia_ifa,
585 error = EPROTONOSUPPORT;
593 * then, make the prefix on-link on the interface.
594 * XXX: we'd rather create the prefix before the address, but
595 * we need at least one address to install the corresponding
596 * interface route, so we configure the address first.
600 * convert mask to prefix length (prefixmask has already
601 * been validated in in6_update_ifa().
603 bzero(&pr0, sizeof(pr0));
605 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
607 if (pr0.ndpr_plen == 128) {
608 /* we don't need to install a host route. */
611 pr0.ndpr_prefix = ifra->ifra_addr;
612 /* apply the mask for safety. */
613 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
614 &ifra->ifra_prefixmask.sin6_addr);
617 * XXX: since we don't have an API to set prefix (not address)
618 * lifetimes, we just use the same lifetimes as addresses.
619 * The (temporarily) installed lifetimes can be overridden by
620 * later advertised RAs (when accept_rtadv is non 0), which is
621 * an intended behavior.
623 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
625 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
626 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
627 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
629 /* add the prefix if not yet. */
630 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
632 * nd6_prelist_add will install the corresponding
635 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
637 (*carp_detach_p)(&ia->ia_ifa, false);
642 /* relate the address to the prefix */
643 if (ia->ia6_ndpr == NULL) {
648 * If this is the first autoconf address from the
649 * prefix, create a temporary address as well
652 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
653 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) {
655 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
656 log(LOG_NOTICE, "in6_control: failed "
657 "to create a temporary address, "
665 * this might affect the status of autoconfigured addresses,
666 * that is, this address might make other addresses detached.
668 pfxlist_onlink_check();
672 * Try to clear the flag when a new IPv6 address is added
673 * onto an IFDISABLED interface and it succeeds.
675 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
676 struct in6_ndireq nd;
678 memset(&nd, 0, sizeof(nd));
679 nd.ndi.flags = ND_IFINFO(ifp)->flags;
680 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
681 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
682 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
683 "SIOCSIFINFO_FLAGS for -ifdisabled "
686 * Ignore failure of clearing the flag intentionally.
687 * The failure means address duplication was detected.
693 case SIOCDIFADDR_IN6:
695 struct nd_prefix *pr;
698 * If the address being deleted is the only one that owns
699 * the corresponding prefix, expire the prefix as well.
700 * XXX: theoretically, we don't have to worry about such
701 * relationship, since we separate the address management
702 * and the prefix management. We do this, however, to provide
703 * as much backward compatibility as possible in terms of
704 * the ioctl operation.
705 * Note that in6_purgeaddr() will decrement ndpr_addrcnt.
708 in6_purgeaddr(&ia->ia_ifa);
709 if (pr != NULL && pr->ndpr_addrcnt == 0) {
711 nd6_prefix_unlink(pr, NULL);
715 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
721 if (ifp->if_ioctl == NULL) {
725 error = (*ifp->if_ioctl)(ifp, cmd, data);
732 ifa_free(&ia->ia_ifa);
737 static struct in6_multi_mship *
738 in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr,
739 int *errorp, int delay)
741 struct in6_multi_mship *imm;
744 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT);
750 delay = (delay * PR_FASTHZ) / hz;
752 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay);
755 free(imm, M_IP6MADDR);
762 * Join necessary multicast groups. Factored out from in6_update_ifa().
763 * This entire work should only be done once, for the default FIB.
766 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
767 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
769 char ip6buf[INET6_ADDRSTRLEN];
770 struct in6_addr mltaddr;
771 struct in6_multi_mship *imm;
774 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
776 /* Join solicited multicast addr for new host id. */
777 bzero(&mltaddr, sizeof(struct in6_addr));
778 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
779 mltaddr.s6_addr32[2] = htonl(1);
780 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
781 mltaddr.s6_addr8[12] = 0xff;
782 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
783 /* XXX: should not happen */
784 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
788 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
790 * We need a random delay for DAD on the address being
791 * configured. It also means delaying transmission of the
792 * corresponding MLD report to avoid report collision.
793 * [RFC 4861, Section 6.3.7]
795 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
797 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
799 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
800 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
801 if_name(ifp), error));
804 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
805 *in6m_sol = imm->i6mm_maddr;
808 * Join link-local all-nodes address.
810 mltaddr = in6addr_linklocal_allnodes;
811 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
812 goto cleanup; /* XXX: should not fail */
814 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
816 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
817 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
818 if_name(ifp), error));
821 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
824 * Join node information group address.
827 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
829 * The spec does not say anything about delay for this group,
830 * but the same logic should apply.
832 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
834 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
836 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
839 "%s: in6_joingroup failed for %s on %s "
840 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
841 &mltaddr), if_name(ifp), error));
842 /* XXX not very fatal, go on... */
844 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
846 if (V_icmp6_nodeinfo_oldmcprefix &&
847 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
848 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
851 "%s: in6_joingroup failed for %s on %s "
852 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
853 &mltaddr), if_name(ifp), error));
854 /* XXX not very fatal, go on... */
856 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
860 * Join interface-local all-nodes address.
861 * (ff01::1%ifN, and ff01::%ifN/32)
863 mltaddr = in6addr_nodelocal_allnodes;
864 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
865 goto cleanup; /* XXX: should not fail */
867 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
869 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
870 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
871 &mltaddr), if_name(ifp), error));
874 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
881 * Update parameters of an IPv6 interface address.
882 * If necessary, a new entry is created and linked into address chains.
883 * This function is separated from in6_control().
886 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
887 struct in6_ifaddr *ia, int flags)
889 int error, hostIsNew = 0;
891 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
896 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
900 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
902 if (hostIsNew != 0) {
903 in6_unlink_ifa(ia, ifp);
904 ifa_free(&ia->ia_ifa);
910 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
916 * Fill in basic IPv6 address request info.
919 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
920 const struct in6_addr *mask)
923 memset(ifra, 0, sizeof(struct in6_aliasreq));
925 ifra->ifra_addr.sin6_family = AF_INET6;
926 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
928 ifra->ifra_addr.sin6_addr = *addr;
930 ifra->ifra_prefixmask.sin6_family = AF_INET6;
931 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
933 ifra->ifra_prefixmask.sin6_addr = *mask;
937 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
938 struct in6_ifaddr *ia, int flags)
941 struct sockaddr_in6 dst6;
942 struct in6_addrlifetime *lt;
943 char ip6buf[INET6_ADDRSTRLEN];
945 /* Validate parameters */
946 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
950 * The destination address for a p2p link must have a family
951 * of AF_UNSPEC or AF_INET6.
953 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
954 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
955 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
956 return (EAFNOSUPPORT);
961 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
962 ifra->ifra_addr.sin6_family != AF_INET6)
966 * validate ifra_prefixmask. don't check sin6_family, netmask
967 * does not carry fields other than sin6_len.
969 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
972 * Because the IPv6 address architecture is classless, we require
973 * users to specify a (non 0) prefix length (mask) for a new address.
974 * We also require the prefix (when specified) mask is valid, and thus
975 * reject a non-consecutive mask.
977 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
979 if (ifra->ifra_prefixmask.sin6_len != 0) {
980 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
981 (u_char *)&ifra->ifra_prefixmask +
982 ifra->ifra_prefixmask.sin6_len);
987 * In this case, ia must not be NULL. We just use its prefix
990 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
993 * If the destination address on a p2p interface is specified,
994 * and the address is a scoped one, validate/set the scope
997 dst6 = ifra->ifra_dstaddr;
998 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
999 (dst6.sin6_family == AF_INET6)) {
1000 struct in6_addr in6_tmp;
1003 in6_tmp = dst6.sin6_addr;
1004 if (in6_setscope(&in6_tmp, ifp, &zoneid))
1005 return (EINVAL); /* XXX: should be impossible */
1007 if (dst6.sin6_scope_id != 0) {
1008 if (dst6.sin6_scope_id != zoneid)
1010 } else /* user omit to specify the ID. */
1011 dst6.sin6_scope_id = zoneid;
1013 /* convert into the internal form */
1014 if (sa6_embedscope(&dst6, 0))
1015 return (EINVAL); /* XXX: should be impossible */
1017 /* Modify original ifra_dstaddr to reflect changes */
1018 ifra->ifra_dstaddr = dst6;
1021 * The destination address can be specified only for a p2p or a
1022 * loopback interface. If specified, the corresponding prefix length
1025 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
1026 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
1027 /* XXX: noisy message */
1028 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
1029 "be specified for a p2p or a loopback IF only\n"));
1033 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
1034 "be 128 when dstaddr is specified\n"));
1038 /* lifetime consistency check */
1039 lt = &ifra->ifra_lifetime;
1040 if (lt->ia6t_pltime > lt->ia6t_vltime)
1042 if (lt->ia6t_vltime == 0) {
1044 * the following log might be noisy, but this is a typical
1045 * configuration mistake or a tool's bug.
1048 "in6_update_ifa: valid lifetime is 0 for %s\n",
1049 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
1052 return (0); /* there's nothing to do */
1055 /* Check prefix mask */
1056 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
1058 * We prohibit changing the prefix length of an existing
1060 * + such an operation should be rare in IPv6, and
1061 * + the operation would confuse prefix management.
1063 if (ia->ia_prefixmask.sin6_len != 0 &&
1064 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
1065 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
1066 "of an existing %s address should not be changed\n",
1067 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1078 * Allocate a new ifaddr and link it into chains.
1080 static struct in6_ifaddr *
1081 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
1083 struct in6_ifaddr *ia;
1086 * When in6_alloc_ifa() is called in a process of a received
1087 * RA, it is called under an interrupt context. So, we should
1088 * call malloc with M_NOWAIT.
1090 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
1093 LIST_INIT(&ia->ia6_memberships);
1094 /* Initialize the address and masks, and put time stamp */
1095 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
1096 ia->ia_addr.sin6_family = AF_INET6;
1097 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
1098 /* XXX: Can we assign ,sin6_addr and skip the rest? */
1099 ia->ia_addr = ifra->ifra_addr;
1100 ia->ia6_createtime = time_uptime;
1101 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
1103 * Some functions expect that ifa_dstaddr is not
1104 * NULL for p2p interfaces.
1106 ia->ia_ifa.ifa_dstaddr =
1107 (struct sockaddr *)&ia->ia_dstaddr;
1109 ia->ia_ifa.ifa_dstaddr = NULL;
1112 /* set prefix mask if any */
1113 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
1114 if (ifra->ifra_prefixmask.sin6_len != 0) {
1115 ia->ia_prefixmask.sin6_family = AF_INET6;
1116 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
1117 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
1121 ifa_ref(&ia->ia_ifa); /* if_addrhead */
1123 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
1124 IF_ADDR_WUNLOCK(ifp);
1126 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1128 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1129 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1130 IN6_IFADDR_WUNLOCK();
1136 * Update/configure interface address parameters:
1138 * 1) Update lifetime
1139 * 2) Update interface metric ad flags
1140 * 3) Notify other subsystems
1143 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1144 struct in6_ifaddr *ia, int hostIsNew, int flags)
1148 /* update timestamp */
1149 ia->ia6_updatetime = time_uptime;
1152 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1153 * to see if the address is deprecated or invalidated, but initialize
1154 * these members for applications.
1156 ia->ia6_lifetime = ifra->ifra_lifetime;
1157 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1158 ia->ia6_lifetime.ia6t_expire =
1159 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1161 ia->ia6_lifetime.ia6t_expire = 0;
1162 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1163 ia->ia6_lifetime.ia6t_preferred =
1164 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1166 ia->ia6_lifetime.ia6t_preferred = 0;
1169 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1170 * userland, make it deprecated.
1172 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1173 ia->ia6_lifetime.ia6t_pltime = 0;
1174 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1178 * configure address flags.
1180 ia->ia6_flags = ifra->ifra_flags;
1183 * Make the address tentative before joining multicast addresses,
1184 * so that corresponding MLD responses would not have a tentative
1187 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1190 * DAD should be performed for an new address or addresses on
1191 * an interface with ND6_IFF_IFDISABLED.
1193 if (in6if_do_dad(ifp) &&
1194 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1195 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1197 /* notify other subsystems */
1198 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1204 * Do link-level ifa job:
1205 * 1) Add lle entry for added address
1206 * 2) Notifies routing socket users about new address
1207 * 3) join appropriate multicast group
1208 * 4) start DAD if enabled
1211 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1212 struct in6_ifaddr *ia, int flags)
1214 struct in6_multi *in6m_sol;
1217 /* Add local address to lltable, if necessary (ex. on p2p link). */
1218 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1219 in6_purgeaddr(&ia->ia_ifa);
1220 ifa_free(&ia->ia_ifa);
1224 /* Join necessary multicast groups. */
1226 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1227 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1229 in6_purgeaddr(&ia->ia_ifa);
1230 ifa_free(&ia->ia_ifa);
1235 /* Perform DAD, if the address is TENTATIVE. */
1236 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1237 int delay, mindelay, maxdelay;
1240 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1242 * We need to impose a delay before sending an NS
1243 * for DAD. Check if we also needed a delay for the
1244 * corresponding MLD message. If we did, the delay
1245 * should be larger than the MLD delay (this could be
1246 * relaxed a bit, but this simple logic is at least
1248 * XXX: Break data hiding guidelines and look at
1249 * state for the solicited multicast group.
1252 if (in6m_sol != NULL &&
1253 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1254 mindelay = in6m_sol->in6m_timer;
1256 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1257 if (maxdelay - mindelay == 0)
1261 (arc4random() % (maxdelay - mindelay)) +
1265 nd6_dad_start((struct ifaddr *)ia, delay);
1268 in6_newaddrmsg(ia, RTM_ADD);
1269 ifa_free(&ia->ia_ifa);
1274 in6_purgeaddr(struct ifaddr *ifa)
1276 struct ifnet *ifp = ifa->ifa_ifp;
1277 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1278 struct in6_multi_mship *imm;
1282 (*carp_detach_p)(ifa, false);
1285 * Remove the loopback route to the interface address.
1286 * The check for the current setting of "nd6_useloopback"
1289 if (ia->ia_flags & IFA_RTSELF) {
1290 error = ifa_del_loopback_route((struct ifaddr *)ia,
1291 (struct sockaddr *)&ia->ia_addr);
1293 ia->ia_flags &= ~IFA_RTSELF;
1296 /* stop DAD processing */
1299 /* Leave multicast groups. */
1300 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1301 LIST_REMOVE(imm, i6mm_chain);
1302 if (imm->i6mm_maddr != NULL)
1303 in6_leavegroup(imm->i6mm_maddr, NULL);
1304 free(imm, M_IP6MADDR);
1306 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1307 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
1308 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags |
1309 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0));
1311 log(LOG_INFO, "%s: err=%d, destination address delete "
1312 "failed\n", __func__, error);
1313 ia->ia_flags &= ~IFA_ROUTE;
1316 in6_newaddrmsg(ia, RTM_DELETE);
1317 in6_unlink_ifa(ia, ifp);
1321 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1323 char ip6buf[INET6_ADDRSTRLEN];
1327 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link);
1328 IF_ADDR_WUNLOCK(ifp);
1329 ifa_free(&ia->ia_ifa); /* if_addrhead */
1332 * Defer the release of what might be the last reference to the
1333 * in6_ifaddr so that it can't be freed before the remainder of the
1337 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link);
1338 CK_LIST_REMOVE(ia, ia6_hash);
1339 IN6_IFADDR_WUNLOCK();
1342 * Release the reference to the base prefix. There should be a
1343 * positive reference.
1346 if (ia->ia6_ndpr == NULL) {
1348 "in6_unlink_ifa: autoconf'ed address "
1349 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1351 ia->ia6_ndpr->ndpr_addrcnt--;
1352 /* Do not delete lles within prefix if refcont != 0 */
1353 if (ia->ia6_ndpr->ndpr_addrcnt == 0)
1355 ia->ia6_ndpr = NULL;
1358 nd6_rem_ifa_lle(ia, remove_lle);
1361 * Also, if the address being removed is autoconf'ed, call
1362 * pfxlist_onlink_check() since the release might affect the status of
1363 * other (detached) addresses.
1365 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1366 pfxlist_onlink_check();
1368 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1372 * Notifies other subsystems about address change/arrival:
1373 * 1) Notifies device handler on the first IPv6 address assignment
1374 * 2) Handle routing table changes for P2P links and route
1375 * 3) Handle routing table changes for address host route
1378 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1379 struct in6_aliasreq *ifra, int hostIsNew)
1381 int error = 0, plen, ifacount = 0;
1383 struct sockaddr_in6 *pdst;
1384 char ip6buf[INET6_ADDRSTRLEN];
1387 * Give the interface a chance to initialize
1388 * if this is its first address,
1390 if (hostIsNew != 0) {
1391 struct epoch_tracker et;
1393 NET_EPOCH_ENTER(et);
1394 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1395 if (ifa->ifa_addr->sa_family != AF_INET6)
1402 if (ifacount <= 1 && ifp->if_ioctl) {
1403 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1409 * If a new destination address is specified, scrub the old one and
1410 * install the new destination. Note that the interface must be
1413 pdst = &ifra->ifra_dstaddr;
1414 if (pdst->sin6_family == AF_INET6 &&
1415 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1416 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1417 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
1418 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1419 "remove a route to the old destination: %s\n",
1420 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1421 /* proceed anyway... */
1423 ia->ia_flags &= ~IFA_ROUTE;
1424 ia->ia_dstaddr = *pdst;
1428 * If a new destination address is specified for a point-to-point
1429 * interface, install a route to the destination as an interface
1431 * XXX: the logic below rejects assigning multiple addresses on a p2p
1432 * interface that share the same destination.
1434 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1435 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
1436 ia->ia_dstaddr.sin6_family == AF_INET6) {
1437 int rtflags = RTF_UP | RTF_HOST;
1439 * Handle the case for ::1 .
1441 if (ifp->if_flags & IFF_LOOPBACK)
1442 ia->ia_flags |= IFA_RTSELF;
1443 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
1446 ia->ia_flags |= IFA_ROUTE;
1450 * add a loopback route to self if not exists
1452 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1453 error = ifa_add_loopback_route((struct ifaddr *)ia,
1454 (struct sockaddr *)&ia->ia_addr);
1456 ia->ia_flags |= IFA_RTSELF;
1459 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1460 "Invoking IPv6 network device address event may sleep");
1462 ifa_ref(&ia->ia_ifa);
1463 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
1465 ifa_free(&ia->ia_ifa);
1471 * Find an IPv6 interface link-local address specific to an interface.
1472 * ifaddr is returned referenced.
1475 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1477 struct epoch_tracker et;
1480 NET_EPOCH_ENTER(et);
1481 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1482 if (ifa->ifa_addr->sa_family != AF_INET6)
1484 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1485 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1494 return ((struct in6_ifaddr *)ifa);
1499 * find the interface address corresponding to a given IPv6 address.
1500 * ifaddr is returned referenced.
1503 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid)
1505 struct rm_priotracker in6_ifa_tracker;
1506 struct in6_ifaddr *ia;
1508 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1509 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1510 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1512 zoneid != ia->ia_addr.sin6_scope_id)
1514 ifa_ref(&ia->ia_ifa);
1518 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1523 * find the internet address corresponding to a given interface and address.
1524 * ifaddr is returned referenced.
1527 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1529 struct epoch_tracker et;
1532 NET_EPOCH_ENTER(et);
1533 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1534 if (ifa->ifa_addr->sa_family != AF_INET6)
1536 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1543 return ((struct in6_ifaddr *)ifa);
1547 * Find a link-local scoped address on ifp and return it if any.
1550 in6ifa_llaonifp(struct ifnet *ifp)
1552 struct epoch_tracker et;
1553 struct sockaddr_in6 *sin6;
1556 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1558 NET_EPOCH_ENTER(et);
1559 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1560 if (ifa->ifa_addr->sa_family != AF_INET6)
1562 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1563 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1564 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1565 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1570 return ((struct in6_ifaddr *)ifa);
1574 * Convert IP6 address to printable (loggable) representation. Caller
1575 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1577 static char digits[] = "0123456789abcdef";
1579 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1581 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1583 const u_int16_t *a = (const u_int16_t *)addr;
1585 int dcolon = 0, zero = 0;
1589 for (i = 0; i < 8; i++) {
1590 if (*(a + i) == 0) {
1595 else if (maxcnt < cnt) {
1606 for (i = 0; i < 8; i++) {
1617 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1629 d = (const u_char *)a;
1630 /* Try to eliminate leading zeros in printout like in :0001. */
1632 *cp = digits[*d >> 4];
1637 *cp = digits[*d++ & 0xf];
1638 if (zero == 0 || (*cp != '0')) {
1642 *cp = digits[*d >> 4];
1643 if (zero == 0 || (*cp != '0')) {
1647 *cp++ = digits[*d & 0xf];
1656 in6_localaddr(struct in6_addr *in6)
1658 struct rm_priotracker in6_ifa_tracker;
1659 struct in6_ifaddr *ia;
1661 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1664 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1665 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1666 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1667 &ia->ia_prefixmask.sin6_addr)) {
1668 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1672 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1678 * Return 1 if an internet address is for the local host and configured
1679 * on one of its interfaces.
1682 in6_localip(struct in6_addr *in6)
1684 struct rm_priotracker in6_ifa_tracker;
1685 struct in6_ifaddr *ia;
1687 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1688 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1689 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1690 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1694 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1699 * Return 1 if an internet address is configured on an interface.
1702 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1704 struct in6_addr in6;
1705 struct epoch_tracker et;
1707 struct in6_ifaddr *ia6;
1710 if (in6_clearscope(&in6))
1712 in6_setscope(&in6, ifp, NULL);
1714 NET_EPOCH_ENTER(et);
1715 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1716 if (ifa->ifa_addr->sa_family != AF_INET6)
1718 ia6 = (struct in6_ifaddr *)ifa;
1719 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) {
1730 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1732 struct rm_priotracker in6_ifa_tracker;
1733 struct in6_ifaddr *ia;
1735 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1736 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1737 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1738 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1739 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1740 return (1); /* true */
1745 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1747 return (0); /* false */
1751 * return length of part which dst and src are equal
1755 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1758 u_char *s = (u_char *)src, *d = (u_char *)dst;
1759 u_char *lim = s + 16, r;
1762 if ((r = (*d++ ^ *s++)) != 0) {
1773 /* XXX: to be scope conscious */
1775 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1777 int bytelen, bitlen;
1780 if (0 > len || len > 128) {
1781 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1789 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1792 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1793 p2->s6_addr[bytelen] >> (8 - bitlen))
1800 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1802 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1803 int bytelen, bitlen, i;
1806 if (0 > len || len > 128) {
1807 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1812 bzero(maskp, sizeof(*maskp));
1815 for (i = 0; i < bytelen; i++)
1816 maskp->s6_addr[i] = 0xff;
1818 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1822 * return the best address out of the same scope. if no address was
1823 * found, return the first valid address from designated IF.
1826 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1828 struct epoch_tracker et;
1829 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1831 struct in6_ifaddr *besta = NULL;
1832 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1834 dep[0] = dep[1] = NULL;
1837 * We first look for addresses in the same scope.
1838 * If there is one, return it.
1839 * If two or more, return one which matches the dst longest.
1840 * If none, return one of global addresses assigned other ifs.
1842 NET_EPOCH_ENTER(et);
1843 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1844 if (ifa->ifa_addr->sa_family != AF_INET6)
1846 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1847 continue; /* XXX: is there any case to allow anycast? */
1848 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1849 continue; /* don't use this interface */
1850 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1852 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1853 if (V_ip6_use_deprecated)
1854 dep[0] = (struct in6_ifaddr *)ifa;
1858 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1860 * call in6_matchlen() as few as possible
1864 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1865 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1868 besta = (struct in6_ifaddr *)ifa;
1871 besta = (struct in6_ifaddr *)ifa;
1875 ifa_ref(&besta->ia_ifa);
1880 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1881 if (ifa->ifa_addr->sa_family != AF_INET6)
1883 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1884 continue; /* XXX: is there any case to allow anycast? */
1885 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1886 continue; /* don't use this interface */
1887 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1889 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1890 if (V_ip6_use_deprecated)
1891 dep[1] = (struct in6_ifaddr *)ifa;
1898 return (struct in6_ifaddr *)ifa;
1901 /* use the last-resort values, that are, deprecated addresses */
1903 ifa_ref((struct ifaddr *)dep[0]);
1908 ifa_ref((struct ifaddr *)dep[1]);
1918 * perform DAD when interface becomes IFF_UP.
1921 in6_if_up(struct ifnet *ifp)
1923 struct epoch_tracker et;
1925 struct in6_ifaddr *ia;
1927 NET_EPOCH_ENTER(et);
1928 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1929 if (ifa->ifa_addr->sa_family != AF_INET6)
1931 ia = (struct in6_ifaddr *)ifa;
1932 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
1934 * The TENTATIVE flag was likely set by hand
1935 * beforehand, implicitly indicating the need for DAD.
1936 * We may be able to skip the random delay in this
1937 * case, but we impose delays just in case.
1940 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
1946 * special cases, like 6to4, are handled in in6_ifattach
1948 in6_ifattach(ifp, NULL);
1952 in6if_do_dad(struct ifnet *ifp)
1955 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
1957 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1959 if ((ND_IFINFO(ifp)->flags &
1960 (ND6_IFF_IFDISABLED | ND6_IFF_NO_DAD)) != 0)
1966 * Calculate max IPv6 MTU through all the interfaces and store it
1972 struct epoch_tracker et;
1973 unsigned long maxmtu = 0;
1976 NET_EPOCH_ENTER(et);
1977 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1978 /* this function can be called during ifnet initialization */
1979 if (!ifp->if_afdata[AF_INET6])
1981 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
1982 IN6_LINKMTU(ifp) > maxmtu)
1983 maxmtu = IN6_LINKMTU(ifp);
1986 if (maxmtu) /* update only when maxmtu is positive */
1987 V_in6_maxmtu = maxmtu;
1991 * Provide the length of interface identifiers to be used for the link attached
1992 * to the given interface. The length should be defined in "IPv6 over
1993 * xxx-link" document. Note that address architecture might also define
1994 * the length for a particular set of address prefixes, regardless of the
1995 * link type. As clarified in rfc2462bis, those two definitions should be
1996 * consistent, and those really are as of August 2004.
1999 in6_if2idlen(struct ifnet *ifp)
2001 switch (ifp->if_type) {
2002 case IFT_ETHER: /* RFC2464 */
2003 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2004 case IFT_L2VLAN: /* ditto */
2005 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */
2006 case IFT_INFINIBAND:
2008 case IFT_PPP: /* RFC2472 */
2010 case IFT_FRELAY: /* RFC2590 */
2012 case IFT_IEEE1394: /* RFC3146 */
2015 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2017 return (64); /* XXX: is this really correct? */
2020 * Unknown link type:
2021 * It might be controversial to use the today's common constant
2022 * of 64 for these cases unconditionally. For full compliance,
2023 * we should return an error in this case. On the other hand,
2024 * if we simply miss the standard for the link type or a new
2025 * standard is defined for a new link type, the IFID length
2026 * is very likely to be the common constant. As a compromise,
2027 * we always use the constant, but make an explicit notice
2028 * indicating the "unknown" case.
2030 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2035 #include <sys/sysctl.h>
2037 struct in6_llentry {
2038 struct llentry base;
2041 #define IN6_LLTBL_DEFAULT_HSIZE 32
2042 #define IN6_LLTBL_HASH(k, h) \
2043 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2046 * Do actual deallocation of @lle.
2049 in6_lltable_destroy_lle_unlocked(epoch_context_t ctx)
2051 struct llentry *lle;
2053 lle = __containerof(ctx, struct llentry, lle_epoch_ctx);
2054 LLE_LOCK_DESTROY(lle);
2055 LLE_REQ_DESTROY(lle);
2056 free(lle, M_LLTABLE);
2060 * Called by LLE_FREE_LOCKED when number of references
2064 in6_lltable_destroy_lle(struct llentry *lle)
2068 epoch_call(net_epoch_preempt, &lle->lle_epoch_ctx, in6_lltable_destroy_lle_unlocked);
2071 static struct llentry *
2072 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2074 struct in6_llentry *lle;
2076 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2077 if (lle == NULL) /* NB: caller generates msg */
2080 lle->base.r_l3addr.addr6 = *addr6;
2081 lle->base.lle_refcnt = 1;
2082 lle->base.lle_free = in6_lltable_destroy_lle;
2083 LLE_LOCK_INIT(&lle->base);
2084 LLE_REQ_INIT(&lle->base);
2085 callout_init(&lle->base.lle_timer, 1);
2087 return (&lle->base);
2091 in6_lltable_match_prefix(const struct sockaddr *saddr,
2092 const struct sockaddr *smask, u_int flags, struct llentry *lle)
2094 const struct in6_addr *addr, *mask, *lle_addr;
2096 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr;
2097 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr;
2098 lle_addr = &lle->r_l3addr.addr6;
2100 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0)
2103 if (lle->la_flags & LLE_IFADDR) {
2106 * Delete LLE_IFADDR records IFF address & flag matches.
2107 * Note that addr is the interface address within prefix
2110 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) &&
2111 (flags & LLE_STATIC) != 0)
2116 /* flags & LLE_STATIC means deleting both dynamic and static entries */
2117 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))
2124 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2128 LLE_WLOCK_ASSERT(lle);
2129 KASSERT(llt != NULL, ("lltable is NULL"));
2131 /* Unlink entry from table */
2132 if ((lle->la_flags & LLE_LINKED) != 0) {
2135 IF_AFDATA_WLOCK_ASSERT(ifp);
2136 lltable_unlink_entry(llt, lle);
2143 in6_lltable_rtcheck(struct ifnet *ifp,
2145 const struct sockaddr *l3addr)
2147 const struct sockaddr_in6 *sin6;
2148 struct nhop6_basic nh6;
2149 struct in6_addr dst;
2152 char ip6buf[INET6_ADDRSTRLEN];
2155 KASSERT(l3addr->sa_family == AF_INET6,
2156 ("sin_family %d", l3addr->sa_family));
2158 sin6 = (const struct sockaddr_in6 *)l3addr;
2159 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid);
2160 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib;
2161 error = fib6_lookup_nh_basic(fibnum, &dst, scopeid, 0, 0, &nh6);
2162 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) {
2163 struct epoch_tracker et;
2166 * Create an ND6 cache for an IPv6 neighbor
2167 * that is not covered by our own prefix.
2169 NET_EPOCH_ENTER(et);
2170 ifa = ifaof_ifpforaddr(l3addr, ifp);
2176 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2177 ip6_sprintf(ip6buf, &sin6->sin6_addr));
2184 * Called by the datapath to indicate that the entry was used.
2187 in6_lltable_mark_used(struct llentry *lle)
2191 lle->r_skip_req = 0;
2194 * Set the hit time so the callback function
2195 * can determine the remaining time before
2196 * transiting to the DELAY state.
2198 lle->lle_hittime = time_uptime;
2199 LLE_REQ_UNLOCK(lle);
2202 static inline uint32_t
2203 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2206 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2210 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2213 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2217 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2219 struct sockaddr_in6 *sin6;
2221 sin6 = (struct sockaddr_in6 *)sa;
2222 bzero(sin6, sizeof(*sin6));
2223 sin6->sin6_family = AF_INET6;
2224 sin6->sin6_len = sizeof(*sin6);
2225 sin6->sin6_addr = lle->r_l3addr.addr6;
2228 static inline struct llentry *
2229 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2231 struct llentry *lle;
2232 struct llentries *lleh;
2235 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2236 lleh = &llt->lle_head[hashidx];
2237 CK_LIST_FOREACH(lle, lleh, lle_next) {
2238 if (lle->la_flags & LLE_DELETED)
2240 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2248 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle)
2251 lle->la_flags |= LLE_DELETED;
2252 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2254 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2259 static struct llentry *
2260 in6_lltable_alloc(struct lltable *llt, u_int flags,
2261 const struct sockaddr *l3addr)
2263 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2264 struct ifnet *ifp = llt->llt_ifp;
2265 struct llentry *lle;
2266 char linkhdr[LLE_MAX_LINKHDR];
2270 KASSERT(l3addr->sa_family == AF_INET6,
2271 ("sin_family %d", l3addr->sa_family));
2274 * A route that covers the given address must have
2275 * been installed 1st because we are doing a resolution,
2278 if (!(flags & LLE_IFADDR) &&
2279 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2282 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2284 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2287 lle->la_flags = flags;
2288 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2289 linkhdrsize = LLE_MAX_LINKHDR;
2290 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp),
2291 linkhdr, &linkhdrsize, &lladdr_off) != 0) {
2292 epoch_call(net_epoch_preempt, &lle->lle_epoch_ctx, in6_lltable_destroy_lle_unlocked);
2295 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize,
2297 lle->la_flags |= LLE_STATIC;
2300 if ((lle->la_flags & LLE_STATIC) != 0)
2301 lle->ln_state = ND6_LLINFO_REACHABLE;
2306 static struct llentry *
2307 in6_lltable_lookup(struct lltable *llt, u_int flags,
2308 const struct sockaddr *l3addr)
2310 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2311 struct llentry *lle;
2313 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2314 KASSERT(l3addr->sa_family == AF_INET6,
2315 ("sin_family %d", l3addr->sa_family));
2316 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) !=
2317 (LLE_UNLOCKED | LLE_EXCLUSIVE),
2318 ("wrong lle request flags: %#x", flags));
2320 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2323 if (flags & LLE_UNLOCKED)
2326 if (flags & LLE_EXCLUSIVE)
2332 * If the afdata lock is not held, the LLE may have been unlinked while
2333 * we were blocked on the LLE lock. Check for this case.
2335 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) {
2336 if (flags & LLE_EXCLUSIVE)
2346 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2347 struct sysctl_req *wr)
2349 struct ifnet *ifp = llt->llt_ifp;
2352 struct rt_msghdr rtm;
2353 struct sockaddr_in6 sin6;
2355 * ndp.c assumes that sdl is word aligned
2360 struct sockaddr_dl sdl;
2362 struct sockaddr_dl *sdl;
2365 bzero(&ndpc, sizeof(ndpc));
2366 /* skip deleted entries */
2367 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2369 /* Skip if jailed and not a valid IP of the prison. */
2370 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6);
2371 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0)
2374 * produce a msg made of:
2376 * struct sockaddr_in6 (IPv6)
2377 * struct sockaddr_dl;
2379 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2380 ndpc.rtm.rtm_version = RTM_VERSION;
2381 ndpc.rtm.rtm_type = RTM_GET;
2382 ndpc.rtm.rtm_flags = RTF_UP;
2383 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2384 if (V_deembed_scopeid)
2385 sa6_recoverscope(&ndpc.sin6);
2388 if (lle->la_flags & LLE_PUB)
2389 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2392 sdl->sdl_family = AF_LINK;
2393 sdl->sdl_len = sizeof(*sdl);
2394 sdl->sdl_index = ifp->if_index;
2395 sdl->sdl_type = ifp->if_type;
2396 if ((lle->la_flags & LLE_VALID) == LLE_VALID) {
2397 sdl->sdl_alen = ifp->if_addrlen;
2398 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2401 bzero(LLADDR(sdl), ifp->if_addrlen);
2403 if (lle->la_expire != 0)
2404 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire +
2405 lle->lle_remtime / hz + time_second - time_uptime;
2406 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2407 if (lle->la_flags & LLE_STATIC)
2408 ndpc.rtm.rtm_flags |= RTF_STATIC;
2409 if (lle->la_flags & LLE_IFADDR)
2410 ndpc.rtm.rtm_flags |= RTF_PINNED;
2411 if (lle->ln_router != 0)
2412 ndpc.rtm.rtm_flags |= RTF_GATEWAY;
2413 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked;
2414 /* Store state in rmx_weight value */
2415 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state;
2416 ndpc.rtm.rtm_index = ifp->if_index;
2417 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2422 static struct lltable *
2423 in6_lltattach(struct ifnet *ifp)
2425 struct lltable *llt;
2427 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2428 llt->llt_af = AF_INET6;
2431 llt->llt_lookup = in6_lltable_lookup;
2432 llt->llt_alloc_entry = in6_lltable_alloc;
2433 llt->llt_delete_entry = in6_lltable_delete_entry;
2434 llt->llt_dump_entry = in6_lltable_dump_entry;
2435 llt->llt_hash = in6_lltable_hash;
2436 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2437 llt->llt_free_entry = in6_lltable_free_entry;
2438 llt->llt_match_prefix = in6_lltable_match_prefix;
2439 llt->llt_mark_used = in6_lltable_mark_used;
2446 in6_domifattach(struct ifnet *ifp)
2448 struct in6_ifextra *ext;
2450 /* There are not IPv6-capable interfaces. */
2451 switch (ifp->if_type) {
2457 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2458 bzero(ext, sizeof(*ext));
2460 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2461 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2462 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2463 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2465 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2466 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2468 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2469 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2471 ext->nd_ifinfo = nd6_ifattach(ifp);
2472 ext->scope6_id = scope6_ifattach(ifp);
2473 ext->lltable = in6_lltattach(ifp);
2475 ext->mld_ifinfo = mld_domifattach(ifp);
2481 in6_domifmtu(struct ifnet *ifp)
2483 if (ifp->if_afdata[AF_INET6] == NULL)
2486 return (IN6_LINKMTU(ifp));
2490 in6_domifdetach(struct ifnet *ifp, void *aux)
2492 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2494 mld_domifdetach(ifp);
2495 scope6_ifdetach(ext->scope6_id);
2496 nd6_ifdetach(ifp, ext->nd_ifinfo);
2497 lltable_free(ext->lltable);
2498 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2499 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2500 free(ext->in6_ifstat, M_IFADDR);
2501 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2502 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2503 free(ext->icmp6_ifstat, M_IFADDR);
2504 free(ext, M_IFADDR);
2508 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2509 * v4 mapped addr or v4 compat addr
2512 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2515 bzero(sin, sizeof(*sin));
2516 sin->sin_len = sizeof(struct sockaddr_in);
2517 sin->sin_family = AF_INET;
2518 sin->sin_port = sin6->sin6_port;
2519 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2522 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2524 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2526 bzero(sin6, sizeof(*sin6));
2527 sin6->sin6_len = sizeof(struct sockaddr_in6);
2528 sin6->sin6_family = AF_INET6;
2529 sin6->sin6_port = sin->sin_port;
2530 sin6->sin6_addr.s6_addr32[0] = 0;
2531 sin6->sin6_addr.s6_addr32[1] = 0;
2532 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2533 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2536 /* Convert sockaddr_in6 into sockaddr_in. */
2538 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2540 struct sockaddr_in *sin_p;
2541 struct sockaddr_in6 sin6;
2544 * Save original sockaddr_in6 addr and convert it
2547 sin6 = *(struct sockaddr_in6 *)nam;
2548 sin_p = (struct sockaddr_in *)nam;
2549 in6_sin6_2_sin(sin_p, &sin6);
2552 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2554 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2556 struct sockaddr_in *sin_p;
2557 struct sockaddr_in6 *sin6_p;
2559 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2560 sin_p = (struct sockaddr_in *)*nam;
2561 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2562 free(*nam, M_SONAME);
2563 *nam = (struct sockaddr *)sin6_p;