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>
83 #include <sys/kernel.h>
85 #include <sys/rmlock.h>
86 #include <sys/sysctl.h>
87 #include <sys/syslog.h>
90 #include <net/if_var.h>
91 #include <net/if_private.h>
92 #include <net/if_types.h>
93 #include <net/route.h>
94 #include <net/route/route_ctl.h>
95 #include <net/route/nhop.h>
96 #include <net/if_dl.h>
99 #include <netinet/in.h>
100 #include <netinet/in_var.h>
101 #include <net/if_llatbl.h>
102 #include <netinet/if_ether.h>
103 #include <netinet/in_systm.h>
104 #include <netinet/ip.h>
105 #include <netinet/in_pcb.h>
106 #include <netinet/ip_carp.h>
108 #include <netinet/ip6.h>
109 #include <netinet6/ip6_var.h>
110 #include <netinet6/nd6.h>
111 #include <netinet6/mld6_var.h>
112 #include <netinet6/ip6_mroute.h>
113 #include <netinet6/in6_ifattach.h>
114 #include <netinet6/scope6_var.h>
115 #include <netinet6/in6_fib.h>
116 #include <netinet6/in6_pcb.h>
119 * struct in6_ifreq and struct ifreq must be type punnable for common members
120 * of ifr_ifru to allow accessors to be shared.
122 _Static_assert(offsetof(struct in6_ifreq, ifr_ifru) ==
123 offsetof(struct ifreq, ifr_ifru),
124 "struct in6_ifreq and struct ifreq are not type punnable");
126 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix);
127 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix)
130 * Definitions of some costant IP6 addresses.
132 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
133 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
134 const struct in6_addr in6addr_nodelocal_allnodes =
135 IN6ADDR_NODELOCAL_ALLNODES_INIT;
136 const struct in6_addr in6addr_linklocal_allnodes =
137 IN6ADDR_LINKLOCAL_ALLNODES_INIT;
138 const struct in6_addr in6addr_linklocal_allrouters =
139 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
140 const struct in6_addr in6addr_linklocal_allv2routers =
141 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT;
143 const struct in6_addr in6mask0 = IN6MASK0;
144 const struct in6_addr in6mask32 = IN6MASK32;
145 const struct in6_addr in6mask64 = IN6MASK64;
146 const struct in6_addr in6mask96 = IN6MASK96;
147 const struct in6_addr in6mask128 = IN6MASK128;
149 const struct sockaddr_in6 sa6_any =
150 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
152 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
153 struct in6_aliasreq *, int);
154 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
156 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *,
157 struct in6_ifaddr *, int);
158 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *,
159 struct in6_aliasreq *, int flags);
160 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *,
161 struct in6_ifaddr *, int, int);
162 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
163 struct in6_ifaddr *, int);
165 static void in6_join_proxy_ndp_mc(struct ifnet *, const struct in6_addr *);
166 static void in6_leave_proxy_ndp_mc(struct ifnet *, const struct in6_addr *);
168 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
169 #define ia62ifa(ia6) (&((ia6)->ia_ifa))
171 static struct sx in6_control_sx;
172 SX_SYSINIT(in6_control_sx, &in6_control_sx, "in6_control");
175 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd)
177 struct rt_addrinfo info;
179 struct sockaddr_dl gateway;
185 * Prepare info data for the host route.
186 * This code mimics one from ifa_maintain_loopback_route().
188 bzero(&info, sizeof(struct rt_addrinfo));
189 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED;
190 info.rti_info[RTAX_DST] = ifa->ifa_addr;
191 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gateway;
192 link_init_sdl(ifa->ifa_ifp, (struct sockaddr *)&gateway, ifa->ifa_ifp->if_type);
193 if (cmd != RTM_DELETE)
194 info.rti_ifp = V_loif;
196 fibnum = ia62ifa(ia)->ifa_ifp->if_fib;
198 if (cmd == RTM_ADD) {
199 rt_addrmsg(cmd, &ia->ia_ifa, fibnum);
200 rt_routemsg_info(cmd, &info, fibnum);
201 } else if (cmd == RTM_DELETE) {
202 rt_routemsg_info(cmd, &info, fibnum);
203 rt_addrmsg(cmd, &ia->ia_ifa, fibnum);
208 in6_mask2len(struct in6_addr *mask, u_char *lim0)
211 u_char *lim = lim0, *p;
213 /* ignore the scope_id part */
214 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask))
215 lim = (u_char *)mask + sizeof(*mask);
216 for (p = (u_char *)mask; p < lim; x++, p++) {
222 for (y = 0; y < 8; y++) {
223 if ((*p & (0x80 >> y)) == 0)
229 * when the limit pointer is given, do a stricter check on the
233 if (y != 0 && (*p & (0x00ff >> y)) != 0)
235 for (p = p + 1; p < lim; p++)
243 #ifdef COMPAT_FREEBSD32
244 struct in6_ndifreq32 {
245 char ifname[IFNAMSIZ];
248 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32)
252 in6_control(struct socket *so, u_long cmd, void *data,
253 struct ifnet *ifp, struct thread *td)
255 struct in6_ifreq *ifr = (struct in6_ifreq *)data;
256 struct in6_ifaddr *ia = NULL;
257 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
258 struct sockaddr_in6 *sa6;
260 bool control_locked = false;
263 * Compat to make pre-10.x ifconfig(8) operable.
265 if (cmd == OSIOCAIFADDR_IN6) {
266 cmd = SIOCAIFADDR_IN6;
271 case SIOCGETSGCNT_IN6:
272 case SIOCGETMIFCNT_IN6:
274 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c.
275 * We cannot see how that would be needed, so do not adjust the
276 * KPI blindly; more likely should clean up the IPv4 variant.
278 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP);
282 case SIOCAADDRCTL_POLICY:
283 case SIOCDADDRCTL_POLICY:
285 error = priv_check(td, PRIV_NETINET_ADDRCTRL6);
289 return (in6_src_ioctl(cmd, data));
296 case SIOCSNDFLUSH_IN6:
297 case SIOCSPFXFLUSH_IN6:
298 case SIOCSRTRFLUSH_IN6:
299 case SIOCSDEFIFACE_IN6:
300 case SIOCSIFINFO_FLAGS:
301 case SIOCSIFINFO_IN6:
303 error = priv_check(td, PRIV_NETINET_ND6);
308 case OSIOCGIFINFO_IN6:
309 case SIOCGIFINFO_IN6:
310 case SIOCGNBRINFO_IN6:
311 case SIOCGDEFIFACE_IN6:
312 return (nd6_ioctl(cmd, data, ifp));
314 #ifdef COMPAT_FREEBSD32
315 case SIOCGDEFIFACE32_IN6:
317 struct in6_ndifreq ndif;
318 struct in6_ndifreq32 *ndif32;
320 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif,
324 ndif32 = (struct in6_ndifreq32 *)data;
325 ndif32->ifindex = ndif.ifindex;
332 case SIOCSIFPREFIX_IN6:
333 case SIOCDIFPREFIX_IN6:
334 case SIOCAIFPREFIX_IN6:
335 case SIOCCIFPREFIX_IN6:
336 case SIOCSGIFPREFIX_IN6:
337 case SIOCGIFPREFIX_IN6:
339 "prefix ioctls are now invalidated. "
340 "please use ifconfig.\n");
347 error = priv_check(td, PRIV_NETINET_SCOPE6);
354 return (scope6_ioctl(cmd, data, ifp));
358 * Find address for this interface, if it exists.
360 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation
361 * only, and used the first interface address as the target of other
362 * operations (without checking ifra_addr). This was because netinet
363 * code/API assumed at most 1 interface address per interface.
364 * Since IPv6 allows a node to assign multiple addresses
365 * on a single interface, we almost always look and check the
366 * presence of ifra_addr, and reject invalid ones here.
367 * It also decreases duplicated code among SIOC*_IN6 operations.
370 case SIOCAIFADDR_IN6:
371 case SIOCSIFPHYADDR_IN6:
372 sa6 = &ifra->ifra_addr;
374 case SIOCSIFADDR_IN6:
375 case SIOCGIFADDR_IN6:
376 case SIOCSIFDSTADDR_IN6:
377 case SIOCSIFNETMASK_IN6:
378 case SIOCGIFDSTADDR_IN6:
379 case SIOCGIFNETMASK_IN6:
380 case SIOCDIFADDR_IN6:
381 case SIOCGIFPSRCADDR_IN6:
382 case SIOCGIFPDSTADDR_IN6:
383 case SIOCGIFAFLAG_IN6:
384 case SIOCSNDFLUSH_IN6:
385 case SIOCSPFXFLUSH_IN6:
386 case SIOCSRTRFLUSH_IN6:
387 case SIOCGIFALIFETIME_IN6:
388 case SIOCGIFSTAT_IN6:
389 case SIOCGIFSTAT_ICMP6:
390 sa6 = &ifr->ifr_addr;
397 * Although we should pass any non-INET6 ioctl requests
398 * down to driver, we filter some legacy INET requests.
399 * Drivers trust SIOCSIFADDR et al to come from an already
400 * privileged layer, and do not perform any credentials
401 * checks or input validation.
408 if (sa6 && sa6->sin6_family == AF_INET6) {
409 if (sa6->sin6_scope_id != 0)
410 error = sa6_embedscope(sa6, 0);
412 error = in6_setscope(&sa6->sin6_addr, ifp, NULL);
415 if (td != NULL && (error = prison_check_ip6(td->td_ucred,
416 &sa6->sin6_addr)) != 0)
418 sx_xlock(&in6_control_sx);
419 control_locked = true;
420 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr);
425 case SIOCSIFADDR_IN6:
426 case SIOCSIFDSTADDR_IN6:
427 case SIOCSIFNETMASK_IN6:
429 * Since IPv6 allows a node to assign multiple addresses
430 * on a single interface, SIOCSIFxxx ioctls are deprecated.
432 /* we decided to obsolete this command (20000704) */
436 case SIOCDIFADDR_IN6:
438 * for IPv4, we look for existing in_ifaddr here to allow
439 * "ifconfig if0 delete" to remove the first IPv4 address on
440 * the interface. For IPv6, as the spec allows multiple
441 * interface address from the day one, we consider "remove the
442 * first one" semantics to be not preferable.
445 error = EADDRNOTAVAIL;
449 case SIOCAIFADDR_IN6:
451 * We always require users to specify a valid IPv6 address for
452 * the corresponding operation.
454 if (ifra->ifra_addr.sin6_family != AF_INET6 ||
455 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
456 error = EAFNOSUPPORT;
461 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ?
462 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR);
467 case SIOCGIFSTAT_IN6:
468 case SIOCGIFSTAT_ICMP6:
469 if (ifp->if_afdata[AF_INET6] == NULL) {
470 error = EPFNOSUPPORT;
475 case SIOCGIFADDR_IN6:
476 /* This interface is basically deprecated. use SIOCGIFCONF. */
478 case SIOCGIFAFLAG_IN6:
479 case SIOCGIFNETMASK_IN6:
480 case SIOCGIFDSTADDR_IN6:
481 case SIOCGIFALIFETIME_IN6:
482 /* must think again about its semantics */
484 error = EADDRNOTAVAIL;
491 case SIOCGIFADDR_IN6:
492 ifr->ifr_addr = ia->ia_addr;
493 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0)
497 case SIOCGIFDSTADDR_IN6:
498 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
502 ifr->ifr_dstaddr = ia->ia_dstaddr;
503 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0)
507 case SIOCGIFNETMASK_IN6:
508 ifr->ifr_addr = ia->ia_prefixmask;
511 case SIOCGIFAFLAG_IN6:
512 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
515 case SIOCGIFSTAT_IN6:
516 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
517 ifp->if_afdata[AF_INET6])->in6_ifstat,
518 &ifr->ifr_ifru.ifru_stat,
519 sizeof(struct in6_ifstat) / sizeof(uint64_t));
522 case SIOCGIFSTAT_ICMP6:
523 COUNTER_ARRAY_COPY(((struct in6_ifextra *)
524 ifp->if_afdata[AF_INET6])->icmp6_ifstat,
525 &ifr->ifr_ifru.ifru_icmp6stat,
526 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
529 case SIOCGIFALIFETIME_IN6:
530 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
531 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
533 struct in6_addrlifetime *retlt =
534 &ifr->ifr_ifru.ifru_lifetime;
537 * XXX: adjust expiration time assuming time_t is
541 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
542 if (ia->ia6_lifetime.ia6t_vltime <
543 maxexpire - ia->ia6_updatetime) {
544 retlt->ia6t_expire = ia->ia6_updatetime +
545 ia->ia6_lifetime.ia6t_vltime;
547 retlt->ia6t_expire = maxexpire;
549 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
551 struct in6_addrlifetime *retlt =
552 &ifr->ifr_ifru.ifru_lifetime;
555 * XXX: adjust expiration time assuming time_t is
559 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1));
560 if (ia->ia6_lifetime.ia6t_pltime <
561 maxexpire - ia->ia6_updatetime) {
562 retlt->ia6t_preferred = ia->ia6_updatetime +
563 ia->ia6_lifetime.ia6t_pltime;
565 retlt->ia6t_preferred = maxexpire;
569 case SIOCAIFADDR_IN6:
570 error = in6_addifaddr(ifp, ifra, ia);
574 case SIOCDIFADDR_IN6:
576 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
581 if (ifp->if_ioctl == NULL) {
585 error = (*ifp->if_ioctl)(ifp, cmd, data);
592 sx_xunlock(&in6_control_sx);
595 ifa_free(&ia->ia_ifa);
599 static struct in6_multi_mship *
600 in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr,
601 int *errorp, int delay)
603 struct in6_multi_mship *imm;
606 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT);
612 delay = (delay * MLD_FASTHZ) / hz;
614 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay);
617 free(imm, M_IP6MADDR);
625 in6_solicited_node_maddr(struct in6_addr *maddr,
626 struct ifnet *ifp, const struct in6_addr *base)
630 bzero(maddr, sizeof(struct in6_addr));
631 maddr->s6_addr32[0] = IPV6_ADDR_INT32_MLL;
632 maddr->s6_addr32[2] = htonl(1);
633 maddr->s6_addr32[3] = base->s6_addr32[3];
634 maddr->s6_addr8[12] = 0xff;
635 if ((error = in6_setscope(maddr, ifp, NULL)) != 0) {
636 /* XXX: should not happen */
637 log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
644 * Join necessary multicast groups. Factored out from in6_update_ifa().
645 * This entire work should only be done once, for the default FIB.
648 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra,
649 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol)
651 char ip6buf[INET6_ADDRSTRLEN];
652 struct in6_addr mltaddr;
653 struct in6_multi_mship *imm;
656 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
658 /* Join solicited multicast addr for new host id. */
659 if ((error = in6_solicited_node_maddr(&mltaddr, ifp,
660 &ifra->ifra_addr.sin6_addr)) != 0)
663 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
665 * We need a random delay for DAD on the address being
666 * configured. It also means delaying transmission of the
667 * corresponding MLD report to avoid report collision.
668 * [RFC 4861, Section 6.3.7]
670 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
672 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
674 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
675 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
676 if_name(ifp), error));
679 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
680 *in6m_sol = imm->i6mm_maddr;
683 * Join link-local all-nodes address.
685 mltaddr = in6addr_linklocal_allnodes;
686 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
687 goto cleanup; /* XXX: should not fail */
689 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
691 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
692 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr),
693 if_name(ifp), error));
696 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
699 * Join node information group address.
702 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
704 * The spec does not say anything about delay for this group,
705 * but the same logic should apply.
707 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz);
709 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) {
711 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
714 "%s: in6_joingroup failed for %s on %s "
715 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
716 &mltaddr), if_name(ifp), error));
717 /* XXX not very fatal, go on... */
719 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
721 if (V_icmp6_nodeinfo_oldmcprefix &&
722 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) {
723 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay);
726 "%s: in6_joingroup failed for %s on %s "
727 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
728 &mltaddr), if_name(ifp), error));
729 /* XXX not very fatal, go on... */
731 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
735 * Join interface-local all-nodes address.
736 * (ff01::1%ifN, and ff01::%ifN/32)
738 mltaddr = in6addr_nodelocal_allnodes;
739 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0)
740 goto cleanup; /* XXX: should not fail */
742 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0);
744 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s "
745 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf,
746 &mltaddr), if_name(ifp), error));
749 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain);
756 * Update parameters of an IPv6 interface address.
757 * If necessary, a new entry is created and linked into address chains.
758 * This function is separated from in6_control().
761 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
762 struct in6_ifaddr *ia, int flags)
764 int error, hostIsNew = 0;
766 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0)
771 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL)
775 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags);
777 if (hostIsNew != 0) {
778 in6_unlink_ifa(ia, ifp);
779 ifa_free(&ia->ia_ifa);
785 error = in6_broadcast_ifa(ifp, ifra, ia, flags);
791 * Fill in basic IPv6 address request info.
794 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
795 const struct in6_addr *mask)
798 memset(ifra, 0, sizeof(struct in6_aliasreq));
800 ifra->ifra_addr.sin6_family = AF_INET6;
801 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6);
803 ifra->ifra_addr.sin6_addr = *addr;
805 ifra->ifra_prefixmask.sin6_family = AF_INET6;
806 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
808 ifra->ifra_prefixmask.sin6_addr = *mask;
812 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra,
813 struct in6_ifaddr *ia, int flags)
816 struct sockaddr_in6 dst6;
817 struct in6_addrlifetime *lt;
818 char ip6buf[INET6_ADDRSTRLEN];
820 /* Validate parameters */
821 if (ifp == NULL || ifra == NULL) /* this maybe redundant */
825 * The destination address for a p2p link must have a family
826 * of AF_UNSPEC or AF_INET6.
828 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
829 ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
830 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
831 return (EAFNOSUPPORT);
836 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
837 ifra->ifra_addr.sin6_family != AF_INET6)
841 * validate ifra_prefixmask. don't check sin6_family, netmask
842 * does not carry fields other than sin6_len.
844 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
847 * Because the IPv6 address architecture is classless, we require
848 * users to specify a (non 0) prefix length (mask) for a new address.
849 * We also require the prefix (when specified) mask is valid, and thus
850 * reject a non-consecutive mask.
852 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
854 if (ifra->ifra_prefixmask.sin6_len != 0) {
855 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
856 (u_char *)&ifra->ifra_prefixmask +
857 ifra->ifra_prefixmask.sin6_len);
862 * In this case, ia must not be NULL. We just use its prefix
865 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
868 * If the destination address on a p2p interface is specified,
869 * and the address is a scoped one, validate/set the scope
872 dst6 = ifra->ifra_dstaddr;
873 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 &&
874 (dst6.sin6_family == AF_INET6)) {
875 struct in6_addr in6_tmp;
878 in6_tmp = dst6.sin6_addr;
879 if (in6_setscope(&in6_tmp, ifp, &zoneid))
880 return (EINVAL); /* XXX: should be impossible */
882 if (dst6.sin6_scope_id != 0) {
883 if (dst6.sin6_scope_id != zoneid)
885 } else /* user omit to specify the ID. */
886 dst6.sin6_scope_id = zoneid;
888 /* convert into the internal form */
889 if (sa6_embedscope(&dst6, 0))
890 return (EINVAL); /* XXX: should be impossible */
892 /* Modify original ifra_dstaddr to reflect changes */
893 ifra->ifra_dstaddr = dst6;
896 * The destination address can be specified only for a p2p or a
897 * loopback interface. If specified, the corresponding prefix length
900 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
901 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
902 /* XXX: noisy message */
903 nd6log((LOG_INFO, "in6_update_ifa: a destination can "
904 "be specified for a p2p or a loopback IF only\n"));
908 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
909 "be 128 when dstaddr is specified\n"));
913 /* lifetime consistency check */
914 lt = &ifra->ifra_lifetime;
915 if (lt->ia6t_pltime > lt->ia6t_vltime)
917 if (lt->ia6t_vltime == 0) {
919 * the following log might be noisy, but this is a typical
920 * configuration mistake or a tool's bug.
923 "in6_update_ifa: valid lifetime is 0 for %s\n",
924 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr)));
927 return (0); /* there's nothing to do */
930 /* Check prefix mask */
931 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) {
933 * We prohibit changing the prefix length of an existing
935 * + such an operation should be rare in IPv6, and
936 * + the operation would confuse prefix management.
938 if (ia->ia_prefixmask.sin6_len != 0 &&
939 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
940 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length "
941 "of an existing %s address should not be changed\n",
942 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
952 * Allocate a new ifaddr and link it into chains.
954 static struct in6_ifaddr *
955 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags)
957 struct in6_ifaddr *ia;
960 * When in6_alloc_ifa() is called in a process of a received
961 * RA, it is called under an interrupt context. So, we should
962 * call malloc with M_NOWAIT.
964 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT);
967 LIST_INIT(&ia->ia6_memberships);
968 /* Initialize the address and masks, and put time stamp */
969 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
970 ia->ia_addr.sin6_family = AF_INET6;
971 ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
972 /* XXX: Can we assign ,sin6_addr and skip the rest? */
973 ia->ia_addr = ifra->ifra_addr;
974 ia->ia6_createtime = time_uptime;
975 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
977 * Some functions expect that ifa_dstaddr is not
978 * NULL for p2p interfaces.
980 ia->ia_ifa.ifa_dstaddr =
981 (struct sockaddr *)&ia->ia_dstaddr;
983 ia->ia_ifa.ifa_dstaddr = NULL;
986 /* set prefix mask if any */
987 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
988 if (ifra->ifra_prefixmask.sin6_len != 0) {
989 ia->ia_prefixmask.sin6_family = AF_INET6;
990 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
991 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
995 ifa_ref(&ia->ia_ifa); /* if_addrhead */
997 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link);
998 IF_ADDR_WUNLOCK(ifp);
1000 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
1002 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
1003 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
1004 IN6_IFADDR_WUNLOCK();
1010 * Update/configure interface address parameters:
1012 * 1) Update lifetime
1013 * 2) Update interface metric ad flags
1014 * 3) Notify other subsystems
1017 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
1018 struct in6_ifaddr *ia, int hostIsNew, int flags)
1022 /* update timestamp */
1023 ia->ia6_updatetime = time_uptime;
1026 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
1027 * to see if the address is deprecated or invalidated, but initialize
1028 * these members for applications.
1030 ia->ia6_lifetime = ifra->ifra_lifetime;
1031 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
1032 ia->ia6_lifetime.ia6t_expire =
1033 time_uptime + ia->ia6_lifetime.ia6t_vltime;
1035 ia->ia6_lifetime.ia6t_expire = 0;
1036 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
1037 ia->ia6_lifetime.ia6t_preferred =
1038 time_uptime + ia->ia6_lifetime.ia6t_pltime;
1040 ia->ia6_lifetime.ia6t_preferred = 0;
1043 * backward compatibility - if IN6_IFF_DEPRECATED is set from the
1044 * userland, make it deprecated.
1046 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) {
1047 ia->ia6_lifetime.ia6t_pltime = 0;
1048 ia->ia6_lifetime.ia6t_preferred = time_uptime;
1052 * configure address flags.
1054 ia->ia6_flags = ifra->ifra_flags;
1057 * Make the address tentative before joining multicast addresses,
1058 * so that corresponding MLD responses would not have a tentative
1061 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */
1064 * DAD should be performed for an new address or addresses on
1065 * an interface with ND6_IFF_IFDISABLED.
1067 if (in6if_do_dad(ifp) &&
1068 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)))
1069 ia->ia6_flags |= IN6_IFF_TENTATIVE;
1071 /* notify other subsystems */
1072 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
1078 * Do link-level ifa job:
1079 * 1) Add lle entry for added address
1080 * 2) Notifies routing socket users about new address
1081 * 3) join appropriate multicast group
1082 * 4) start DAD if enabled
1085 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
1086 struct in6_ifaddr *ia, int flags)
1088 struct in6_multi *in6m_sol;
1091 /* Add local address to lltable, if necessary (ex. on p2p link). */
1092 if ((error = nd6_add_ifa_lle(ia)) != 0) {
1093 in6_purgeaddr(&ia->ia_ifa);
1094 ifa_free(&ia->ia_ifa);
1098 /* Join necessary multicast groups. */
1100 if ((ifp->if_flags & IFF_MULTICAST) != 0) {
1101 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
1103 in6_purgeaddr(&ia->ia_ifa);
1104 ifa_free(&ia->ia_ifa);
1109 /* Perform DAD, if the address is TENTATIVE. */
1110 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) {
1111 int delay, mindelay, maxdelay;
1114 if ((flags & IN6_IFAUPDATE_DADDELAY)) {
1116 * We need to impose a delay before sending an NS
1117 * for DAD. Check if we also needed a delay for the
1118 * corresponding MLD message. If we did, the delay
1119 * should be larger than the MLD delay (this could be
1120 * relaxed a bit, but this simple logic is at least
1122 * XXX: Break data hiding guidelines and look at
1123 * state for the solicited multicast group.
1126 if (in6m_sol != NULL &&
1127 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) {
1128 mindelay = in6m_sol->in6m_timer;
1130 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz;
1131 if (maxdelay - mindelay == 0)
1135 (arc4random() % (maxdelay - mindelay)) +
1139 nd6_dad_start((struct ifaddr *)ia, delay);
1142 in6_newaddrmsg(ia, RTM_ADD);
1143 ifa_free(&ia->ia_ifa);
1148 * Adds or deletes interface route for p2p ifa.
1149 * Returns 0 on success or errno.
1152 in6_handle_dstaddr_rtrequest(int cmd, struct in6_ifaddr *ia)
1154 struct epoch_tracker et;
1155 struct ifaddr *ifa = &ia->ia_ifa;
1158 /* Prepare gateway */
1159 struct sockaddr_dl_short sdl = {
1160 .sdl_family = AF_LINK,
1161 .sdl_len = sizeof(struct sockaddr_dl_short),
1162 .sdl_type = ifa->ifa_ifp->if_type,
1163 .sdl_index = ifa->ifa_ifp->if_index,
1166 struct sockaddr_in6 dst = {
1167 .sin6_family = AF_INET6,
1168 .sin6_len = sizeof(struct sockaddr_in6),
1169 .sin6_addr = ia->ia_dstaddr.sin6_addr,
1172 struct rt_addrinfo info = {
1174 .rti_ifp = ifa->ifa_ifp,
1175 .rti_flags = RTF_PINNED | RTF_HOST,
1177 [RTAX_DST] = (struct sockaddr *)&dst,
1178 [RTAX_GATEWAY] = (struct sockaddr *)&sdl,
1181 /* Don't set additional per-gw filters on removal */
1183 NET_EPOCH_ENTER(et);
1184 error = rib_handle_ifaddr_info(ifa->ifa_ifp->if_fib, cmd, &info);
1191 ifa_is_p2p(struct in6_ifaddr *ia)
1195 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
1197 if ((plen == 128) && (ia->ia_dstaddr.sin6_family == AF_INET6) &&
1198 !IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, &ia->ia_dstaddr.sin6_addr))
1205 in6_addifaddr(struct ifnet *ifp, struct in6_aliasreq *ifra, struct in6_ifaddr *ia)
1207 struct nd_prefixctl pr0;
1208 struct nd_prefix *pr;
1209 int carp_attached = 0;
1213 * first, make or update the interface address structure,
1214 * and link it to the list.
1216 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0)
1219 if (ia->ia_ifa.ifa_carp)
1220 (*carp_detach_p)(&ia->ia_ifa, true);
1221 ifa_free(&ia->ia_ifa);
1223 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) == NULL) {
1225 * this can happen when the user specify the 0 valid
1231 if (ifra->ifra_vhid > 0) {
1232 if (carp_attach_p != NULL)
1233 error = (*carp_attach_p)(&ia->ia_ifa,
1236 error = EPROTONOSUPPORT;
1244 * then, make the prefix on-link on the interface.
1245 * XXX: we'd rather create the prefix before the address, but
1246 * we need at least one address to install the corresponding
1247 * interface route, so we configure the address first.
1251 * convert mask to prefix length (prefixmask has already
1252 * been validated in in6_update_ifa().
1254 bzero(&pr0, sizeof(pr0));
1256 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
1258 if (pr0.ndpr_plen == 128) {
1259 /* we don't need to install a host route. */
1262 pr0.ndpr_prefix = ifra->ifra_addr;
1263 /* apply the mask for safety. */
1264 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr,
1265 &ifra->ifra_prefixmask.sin6_addr);
1268 * XXX: since we don't have an API to set prefix (not address)
1269 * lifetimes, we just use the same lifetimes as addresses.
1270 * The (temporarily) installed lifetimes can be overridden by
1271 * later advertised RAs (when accept_rtadv is non 0), which is
1272 * an intended behavior.
1274 pr0.ndpr_raf_onlink = 1; /* should be configurable? */
1276 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
1277 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
1278 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
1280 /* add the prefix if not yet. */
1281 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
1283 * nd6_prelist_add will install the corresponding
1286 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) {
1288 (*carp_detach_p)(&ia->ia_ifa, false);
1293 /* relate the address to the prefix */
1294 if (ia->ia6_ndpr == NULL) {
1299 * If this is the first autoconf address from the
1300 * prefix, create a temporary address as well
1303 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) &&
1304 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) {
1306 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) {
1307 log(LOG_NOTICE, "in6_control: failed "
1308 "to create a temporary address, "
1313 nd6_prefix_rele(pr);
1316 * this might affect the status of autoconfigured addresses,
1317 * that is, this address might make other addresses detached.
1319 pfxlist_onlink_check();
1323 * Try to clear the flag when a new IPv6 address is added
1324 * onto an IFDISABLED interface and it succeeds.
1326 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) {
1327 struct in6_ndireq nd;
1329 memset(&nd, 0, sizeof(nd));
1330 nd.ndi.flags = ND_IFINFO(ifp)->flags;
1331 nd.ndi.flags &= ~ND6_IFF_IFDISABLED;
1332 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0)
1333 log(LOG_NOTICE, "SIOCAIFADDR_IN6: "
1334 "SIOCSIFINFO_FLAGS for -ifdisabled "
1337 * Ignore failure of clearing the flag intentionally.
1338 * The failure means address duplication was detected.
1345 ifa_free(&ia->ia_ifa);
1350 in6_purgeaddr(struct ifaddr *ifa)
1352 struct ifnet *ifp = ifa->ifa_ifp;
1353 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
1354 struct in6_multi_mship *imm;
1358 (*carp_detach_p)(ifa, false);
1361 * Remove the loopback route to the interface address.
1362 * The check for the current setting of "nd6_useloopback"
1365 if (ia->ia_flags & IFA_RTSELF) {
1366 error = ifa_del_loopback_route((struct ifaddr *)ia,
1367 (struct sockaddr *)&ia->ia_addr);
1369 ia->ia_flags &= ~IFA_RTSELF;
1372 /* stop DAD processing */
1375 /* Leave multicast groups. */
1376 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) {
1377 LIST_REMOVE(imm, i6mm_chain);
1378 if (imm->i6mm_maddr != NULL)
1379 in6_leavegroup(imm->i6mm_maddr, NULL);
1380 free(imm, M_IP6MADDR);
1382 /* Check if we need to remove p2p route */
1383 if ((ia->ia_flags & IFA_ROUTE) && ifa_is_p2p(ia)) {
1384 error = in6_handle_dstaddr_rtrequest(RTM_DELETE, ia);
1386 log(LOG_INFO, "%s: err=%d, destination address delete "
1387 "failed\n", __func__, error);
1388 ia->ia_flags &= ~IFA_ROUTE;
1391 in6_newaddrmsg(ia, RTM_DELETE);
1392 in6_unlink_ifa(ia, ifp);
1396 * Removes @ia from the corresponding interfaces and unlinks corresponding
1397 * prefix if no addresses are using it anymore.
1400 in6_purgeifaddr(struct in6_ifaddr *ia)
1402 struct nd_prefix *pr;
1405 * If the address being deleted is the only one that owns
1406 * the corresponding prefix, expire the prefix as well.
1407 * XXX: theoretically, we don't have to worry about such
1408 * relationship, since we separate the address management
1409 * and the prefix management. We do this, however, to provide
1410 * as much backward compatibility as possible in terms of
1411 * the ioctl operation.
1412 * Note that in6_purgeaddr() will decrement ndpr_addrcnt.
1415 in6_purgeaddr(&ia->ia_ifa);
1416 if (pr != NULL && pr->ndpr_addrcnt == 0) {
1418 nd6_prefix_unlink(pr, NULL);
1426 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp)
1428 char ip6buf[INET6_ADDRSTRLEN];
1432 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link);
1433 IF_ADDR_WUNLOCK(ifp);
1434 ifa_free(&ia->ia_ifa); /* if_addrhead */
1437 * Defer the release of what might be the last reference to the
1438 * in6_ifaddr so that it can't be freed before the remainder of the
1442 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link);
1443 CK_LIST_REMOVE(ia, ia6_hash);
1444 IN6_IFADDR_WUNLOCK();
1447 * Release the reference to the base prefix. There should be a
1448 * positive reference.
1451 if (ia->ia6_ndpr == NULL) {
1453 "in6_unlink_ifa: autoconf'ed address "
1454 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia))));
1456 ia->ia6_ndpr->ndpr_addrcnt--;
1457 /* Do not delete lles within prefix if refcont != 0 */
1458 if (ia->ia6_ndpr->ndpr_addrcnt == 0)
1460 ia->ia6_ndpr = NULL;
1463 nd6_rem_ifa_lle(ia, remove_lle);
1466 * Also, if the address being removed is autoconf'ed, call
1467 * pfxlist_onlink_check() since the release might affect the status of
1468 * other (detached) addresses.
1470 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) {
1471 pfxlist_onlink_check();
1473 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */
1477 * Notifies other subsystems about address change/arrival:
1478 * 1) Notifies device handler on the first IPv6 address assignment
1479 * 2) Handle routing table changes for P2P links and route
1480 * 3) Handle routing table changes for address host route
1483 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
1484 struct in6_aliasreq *ifra, int hostIsNew)
1486 int error = 0, ifacount = 0;
1488 struct sockaddr_in6 *pdst;
1489 char ip6buf[INET6_ADDRSTRLEN];
1492 * Give the interface a chance to initialize
1493 * if this is its first address,
1495 if (hostIsNew != 0) {
1496 struct epoch_tracker et;
1498 NET_EPOCH_ENTER(et);
1499 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1500 if (ifa->ifa_addr->sa_family != AF_INET6)
1507 if (ifacount <= 1 && ifp->if_ioctl) {
1508 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
1514 * If a new destination address is specified, scrub the old one and
1515 * install the new destination. Note that the interface must be
1518 pdst = &ifra->ifra_dstaddr;
1519 if (pdst->sin6_family == AF_INET6 &&
1520 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
1521 if ((ia->ia_flags & IFA_ROUTE) != 0 &&
1522 (in6_handle_dstaddr_rtrequest(RTM_DELETE, ia) != 0)) {
1523 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
1524 "remove a route to the old destination: %s\n",
1525 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
1526 /* proceed anyway... */
1528 ia->ia_flags &= ~IFA_ROUTE;
1529 ia->ia_dstaddr = *pdst;
1533 * If a new destination address is specified for a point-to-point
1534 * interface, install a route to the destination as an interface
1536 * XXX: the logic below rejects assigning multiple addresses on a p2p
1537 * interface that share the same destination.
1539 if (!(ia->ia_flags & IFA_ROUTE) && ifa_is_p2p(ia)) {
1540 error = in6_handle_dstaddr_rtrequest(RTM_ADD, ia);
1543 ia->ia_flags |= IFA_ROUTE;
1547 * add a loopback route to self if not exists
1549 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
1550 error = ifa_add_loopback_route((struct ifaddr *)ia,
1551 (struct sockaddr *)&ia->ia_addr);
1553 ia->ia_flags |= IFA_RTSELF;
1556 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1557 "Invoking IPv6 network device address event may sleep");
1559 ifa_ref(&ia->ia_ifa);
1560 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa,
1562 ifa_free(&ia->ia_ifa);
1568 * Find an IPv6 interface link-local address specific to an interface.
1569 * ifaddr is returned referenced.
1572 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags)
1578 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1579 if (ifa->ifa_addr->sa_family != AF_INET6)
1581 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
1582 if ((((struct in6_ifaddr *)ifa)->ia6_flags &
1590 return ((struct in6_ifaddr *)ifa);
1594 * find the interface address corresponding to a given IPv6 address.
1595 * ifaddr is returned referenced if @referenced flag is set.
1598 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid, bool referenced)
1600 struct rm_priotracker in6_ifa_tracker;
1601 struct in6_ifaddr *ia;
1603 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1604 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) {
1605 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) {
1607 zoneid != ia->ia_addr.sin6_scope_id)
1610 ifa_ref(&ia->ia_ifa);
1614 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1619 * find the internet address corresponding to a given interface and address.
1620 * ifaddr is returned referenced.
1623 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr)
1625 struct epoch_tracker et;
1628 NET_EPOCH_ENTER(et);
1629 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1630 if (ifa->ifa_addr->sa_family != AF_INET6)
1632 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) {
1639 return ((struct in6_ifaddr *)ifa);
1643 * Find a link-local scoped address on ifp and return it if any.
1646 in6ifa_llaonifp(struct ifnet *ifp)
1648 struct epoch_tracker et;
1649 struct sockaddr_in6 *sin6;
1652 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
1654 NET_EPOCH_ENTER(et);
1655 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1656 if (ifa->ifa_addr->sa_family != AF_INET6)
1658 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1659 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
1660 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) ||
1661 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr))
1666 return ((struct in6_ifaddr *)ifa);
1670 * Convert IP6 address to printable (loggable) representation. Caller
1671 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long.
1673 static char digits[] = "0123456789abcdef";
1675 ip6_sprintf(char *ip6buf, const struct in6_addr *addr)
1677 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0;
1679 const u_int16_t *a = (const u_int16_t *)addr;
1681 int dcolon = 0, zero = 0;
1685 for (i = 0; i < 8; i++) {
1686 if (*(a + i) == 0) {
1691 else if (maxcnt < cnt) {
1702 for (i = 0; i < 8; i++) {
1713 if (dcolon == 0 && *(a + 1) == 0 && i == index) {
1725 d = (const u_char *)a;
1726 /* Try to eliminate leading zeros in printout like in :0001. */
1728 *cp = digits[*d >> 4];
1733 *cp = digits[*d++ & 0xf];
1734 if (zero == 0 || (*cp != '0')) {
1738 *cp = digits[*d >> 4];
1739 if (zero == 0 || (*cp != '0')) {
1743 *cp++ = digits[*d & 0xf];
1752 in6_localaddr(struct in6_addr *in6)
1754 struct rm_priotracker in6_ifa_tracker;
1755 struct in6_ifaddr *ia;
1757 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
1760 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1761 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
1762 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
1763 &ia->ia_prefixmask.sin6_addr)) {
1764 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1768 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1774 * Return 1 if an internet address is for the local host and configured
1775 * on one of its interfaces.
1778 in6_localip(struct in6_addr *in6)
1780 struct rm_priotracker in6_ifa_tracker;
1781 struct in6_ifaddr *ia;
1783 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1784 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1785 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) {
1786 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1790 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1795 * Like in6_localip(), but FIB-aware.
1798 in6_localip_fib(struct in6_addr *in6, uint16_t fib)
1800 struct rm_priotracker in6_ifa_tracker;
1801 struct in6_ifaddr *ia;
1803 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1804 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) {
1805 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr) &&
1806 ia->ia_ifa.ifa_ifp->if_fib == fib) {
1807 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1811 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1816 * Return 1 if an internet address is configured on an interface.
1819 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr)
1821 struct in6_addr in6;
1823 struct in6_ifaddr *ia6;
1828 if (in6_clearscope(&in6))
1830 in6_setscope(&in6, ifp, NULL);
1832 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1833 if (ifa->ifa_addr->sa_family != AF_INET6)
1835 ia6 = (struct in6_ifaddr *)ifa;
1836 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6))
1844 in6_is_addr_deprecated(struct sockaddr_in6 *sa6)
1846 struct rm_priotracker in6_ifa_tracker;
1847 struct in6_ifaddr *ia;
1849 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
1850 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) {
1851 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) {
1852 if (ia->ia6_flags & IN6_IFF_DEPRECATED) {
1853 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1854 return (1); /* true */
1859 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
1861 return (0); /* false */
1865 * return length of part which dst and src are equal
1869 in6_matchlen(struct in6_addr *src, struct in6_addr *dst)
1872 u_char *s = (u_char *)src, *d = (u_char *)dst;
1873 u_char *lim = s + 16, r;
1876 if ((r = (*d++ ^ *s++)) != 0) {
1887 /* XXX: to be scope conscious */
1889 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len)
1891 int bytelen, bitlen;
1894 if (0 > len || len > 128) {
1895 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
1903 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
1906 p1->s6_addr[bytelen] >> (8 - bitlen) !=
1907 p2->s6_addr[bytelen] >> (8 - bitlen))
1914 in6_prefixlen2mask(struct in6_addr *maskp, int len)
1916 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
1917 int bytelen, bitlen, i;
1920 if (0 > len || len > 128) {
1921 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
1926 bzero(maskp, sizeof(*maskp));
1929 for (i = 0; i < bytelen; i++)
1930 maskp->s6_addr[i] = 0xff;
1932 maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
1936 * return the best address out of the same scope. if no address was
1937 * found, return the first valid address from designated IF.
1940 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst)
1942 int dst_scope = in6_addrscope(dst), blen = -1, tlen;
1944 struct in6_ifaddr *besta = NULL;
1945 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
1949 dep[0] = dep[1] = NULL;
1952 * We first look for addresses in the same scope.
1953 * If there is one, return it.
1954 * If two or more, return one which matches the dst longest.
1955 * If none, return one of global addresses assigned other ifs.
1957 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1958 if (ifa->ifa_addr->sa_family != AF_INET6)
1960 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1961 continue; /* XXX: is there any case to allow anycast? */
1962 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1963 continue; /* don't use this interface */
1964 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
1966 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
1967 if (V_ip6_use_deprecated)
1968 dep[0] = (struct in6_ifaddr *)ifa;
1972 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
1974 * call in6_matchlen() as few as possible
1978 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
1979 tlen = in6_matchlen(IFA_IN6(ifa), dst);
1982 besta = (struct in6_ifaddr *)ifa;
1985 besta = (struct in6_ifaddr *)ifa;
1991 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1992 if (ifa->ifa_addr->sa_family != AF_INET6)
1994 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
1995 continue; /* XXX: is there any case to allow anycast? */
1996 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
1997 continue; /* don't use this interface */
1998 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
2000 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
2001 if (V_ip6_use_deprecated)
2002 dep[1] = (struct in6_ifaddr *)ifa;
2006 return (struct in6_ifaddr *)ifa;
2009 /* use the last-resort values, that are, deprecated addresses */
2019 * perform DAD when interface becomes IFF_UP.
2022 in6_if_up(struct ifnet *ifp)
2024 struct epoch_tracker et;
2026 struct in6_ifaddr *ia;
2028 NET_EPOCH_ENTER(et);
2029 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2030 if (ifa->ifa_addr->sa_family != AF_INET6)
2032 ia = (struct in6_ifaddr *)ifa;
2033 if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
2035 * The TENTATIVE flag was likely set by hand
2036 * beforehand, implicitly indicating the need for DAD.
2037 * We may be able to skip the random delay in this
2038 * case, but we impose delays just in case.
2041 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz));
2047 * special cases, like 6to4, are handled in in6_ifattach
2049 in6_ifattach(ifp, NULL);
2053 in6_ifevent(void *arg __unused, struct ifnet *ifp, int event)
2055 if (event == IFNET_EVENT_UP)
2060 in6_init(void *arg __unused)
2062 EVENTHANDLER_REGISTER(ifnet_event, in6_ifevent, NULL, EVENTHANDLER_PRI_ANY);
2064 SYSINIT(in6_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, in6_init, NULL);
2067 in6if_do_dad(struct ifnet *ifp)
2070 if ((ifp->if_flags & IFF_LOOPBACK) != 0)
2072 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2074 if ((ND_IFINFO(ifp)->flags &
2075 (ND6_IFF_IFDISABLED | ND6_IFF_NO_DAD)) != 0)
2081 * Calculate max IPv6 MTU through all the interfaces and store it
2087 struct epoch_tracker et;
2088 unsigned long maxmtu = 0;
2091 NET_EPOCH_ENTER(et);
2092 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2093 /* this function can be called during ifnet initialization */
2094 if (!ifp->if_afdata[AF_INET6])
2096 if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
2097 IN6_LINKMTU(ifp) > maxmtu)
2098 maxmtu = IN6_LINKMTU(ifp);
2101 if (maxmtu) /* update only when maxmtu is positive */
2102 V_in6_maxmtu = maxmtu;
2106 * Provide the length of interface identifiers to be used for the link attached
2107 * to the given interface. The length should be defined in "IPv6 over
2108 * xxx-link" document. Note that address architecture might also define
2109 * the length for a particular set of address prefixes, regardless of the
2110 * link type. As clarified in rfc2462bis, those two definitions should be
2111 * consistent, and those really are as of August 2004.
2114 in6_if2idlen(struct ifnet *ifp)
2116 switch (ifp->if_type) {
2117 case IFT_ETHER: /* RFC2464 */
2118 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */
2119 case IFT_L2VLAN: /* ditto */
2120 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */
2121 case IFT_INFINIBAND:
2123 case IFT_PPP: /* RFC2472 */
2125 case IFT_FRELAY: /* RFC2590 */
2127 case IFT_IEEE1394: /* RFC3146 */
2130 return (64); /* draft-ietf-v6ops-mech-v2-07 */
2132 return (64); /* XXX: is this really correct? */
2135 * Unknown link type:
2136 * It might be controversial to use the today's common constant
2137 * of 64 for these cases unconditionally. For full compliance,
2138 * we should return an error in this case. On the other hand,
2139 * if we simply miss the standard for the link type or a new
2140 * standard is defined for a new link type, the IFID length
2141 * is very likely to be the common constant. As a compromise,
2142 * we always use the constant, but make an explicit notice
2143 * indicating the "unknown" case.
2145 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type);
2150 struct in6_llentry {
2151 struct llentry base;
2154 #define IN6_LLTBL_DEFAULT_HSIZE 32
2155 #define IN6_LLTBL_HASH(k, h) \
2156 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1))
2159 * Do actual deallocation of @lle.
2162 in6_lltable_destroy_lle_unlocked(epoch_context_t ctx)
2164 struct llentry *lle;
2166 lle = __containerof(ctx, struct llentry, lle_epoch_ctx);
2167 LLE_LOCK_DESTROY(lle);
2168 LLE_REQ_DESTROY(lle);
2169 free(lle, M_LLTABLE);
2173 * Called by LLE_FREE_LOCKED when number of references
2177 in6_lltable_destroy_lle(struct llentry *lle)
2181 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx);
2184 static struct llentry *
2185 in6_lltable_new(const struct in6_addr *addr6, u_int flags)
2187 struct in6_llentry *lle;
2189 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO);
2190 if (lle == NULL) /* NB: caller generates msg */
2193 lle->base.r_l3addr.addr6 = *addr6;
2194 lle->base.lle_refcnt = 1;
2195 lle->base.lle_free = in6_lltable_destroy_lle;
2196 LLE_LOCK_INIT(&lle->base);
2197 LLE_REQ_INIT(&lle->base);
2198 callout_init(&lle->base.lle_timer, 1);
2200 return (&lle->base);
2204 in6_lltable_match_prefix(const struct sockaddr *saddr,
2205 const struct sockaddr *smask, u_int flags, struct llentry *lle)
2207 const struct in6_addr *addr, *mask, *lle_addr;
2209 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr;
2210 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr;
2211 lle_addr = &lle->r_l3addr.addr6;
2213 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0)
2216 if (lle->la_flags & LLE_IFADDR) {
2218 * Delete LLE_IFADDR records IFF address & flag matches.
2219 * Note that addr is the interface address within prefix
2222 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) &&
2223 (flags & LLE_STATIC) != 0)
2228 /* flags & LLE_STATIC means deleting both dynamic and static entries */
2229 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))
2236 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle)
2238 struct ifnet *ifp __diagused;
2240 LLE_WLOCK_ASSERT(lle);
2241 KASSERT(llt != NULL, ("lltable is NULL"));
2243 /* Unlink entry from table */
2244 if ((lle->la_flags & LLE_LINKED) != 0) {
2246 IF_AFDATA_WLOCK_ASSERT(ifp);
2247 lltable_unlink_entry(llt, lle);
2254 in6_lltable_rtcheck(struct ifnet *ifp,
2256 const struct sockaddr *l3addr)
2258 const struct sockaddr_in6 *sin6;
2259 struct nhop_object *nh;
2260 struct in6_addr dst;
2262 char ip6buf[INET6_ADDRSTRLEN];
2266 KASSERT(l3addr->sa_family == AF_INET6,
2267 ("sin_family %d", l3addr->sa_family));
2269 sin6 = (const struct sockaddr_in6 *)l3addr;
2270 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid);
2271 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib;
2272 nh = fib6_lookup(fibnum, &dst, scopeid, NHR_NONE, 0);
2273 if (nh && ((nh->nh_flags & NHF_GATEWAY) || nh->nh_ifp != ifp)) {
2276 * Create an ND6 cache for an IPv6 neighbor
2277 * that is not covered by our own prefix.
2279 ifa = ifaof_ifpforaddr(l3addr, ifp);
2283 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n",
2284 ip6_sprintf(ip6buf, &sin6->sin6_addr));
2290 static inline uint32_t
2291 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize)
2294 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize));
2298 in6_lltable_hash(const struct llentry *lle, uint32_t hsize)
2301 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize));
2305 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa)
2307 struct sockaddr_in6 *sin6;
2309 sin6 = (struct sockaddr_in6 *)sa;
2310 bzero(sin6, sizeof(*sin6));
2311 sin6->sin6_family = AF_INET6;
2312 sin6->sin6_len = sizeof(*sin6);
2313 sin6->sin6_addr = lle->r_l3addr.addr6;
2316 static inline struct llentry *
2317 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst)
2319 struct llentry *lle;
2320 struct llentries *lleh;
2323 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize);
2324 lleh = &llt->lle_head[hashidx];
2325 CK_LIST_FOREACH(lle, lleh, lle_next) {
2326 if (lle->la_flags & LLE_DELETED)
2328 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst))
2336 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle)
2339 lle->la_flags |= LLE_DELETED;
2341 /* Leave the solicited multicast group. */
2342 if ((lle->la_flags & LLE_PUB) != 0)
2343 in6_leave_proxy_ndp_mc(llt->llt_ifp, &lle->r_l3addr.addr6);
2344 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
2346 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
2351 static struct llentry *
2352 in6_lltable_alloc(struct lltable *llt, u_int flags,
2353 const struct sockaddr *l3addr)
2355 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2356 struct ifnet *ifp = llt->llt_ifp;
2357 struct llentry *lle;
2358 char linkhdr[LLE_MAX_LINKHDR];
2362 KASSERT(l3addr->sa_family == AF_INET6,
2363 ("sin_family %d", l3addr->sa_family));
2366 * A route that covers the given address must have
2367 * been installed 1st because we are doing a resolution,
2370 if (!(flags & LLE_IFADDR) &&
2371 in6_lltable_rtcheck(ifp, flags, l3addr) != 0)
2374 lle = in6_lltable_new(&sin6->sin6_addr, flags);
2376 log(LOG_INFO, "lla_lookup: new lle malloc failed\n");
2379 lle->la_flags = flags;
2380 if ((flags & LLE_IFADDR) == LLE_IFADDR) {
2381 linkhdrsize = LLE_MAX_LINKHDR;
2382 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp),
2383 linkhdr, &linkhdrsize, &lladdr_off) != 0) {
2384 in6_lltable_free_entry(llt, lle);
2387 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize,
2389 lle->la_flags |= LLE_STATIC;
2392 if ((lle->la_flags & LLE_STATIC) != 0)
2393 lle->ln_state = ND6_LLINFO_REACHABLE;
2398 static struct llentry *
2399 in6_lltable_lookup(struct lltable *llt, u_int flags,
2400 const struct sockaddr *l3addr)
2402 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr;
2403 int family = flags >> 16;
2404 struct llentry *lle;
2406 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp);
2407 KASSERT(l3addr->sa_family == AF_INET6,
2408 ("sin_family %d", l3addr->sa_family));
2409 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) !=
2410 (LLE_UNLOCKED | LLE_EXCLUSIVE),
2411 ("wrong lle request flags: %#x", flags));
2413 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr);
2415 if (__predict_false(family != AF_INET6))
2416 lle = llentry_lookup_family(lle, family);
2421 if (flags & LLE_UNLOCKED)
2424 if (flags & LLE_EXCLUSIVE)
2430 * If the afdata lock is not held, the LLE may have been unlinked while
2431 * we were blocked on the LLE lock. Check for this case.
2433 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) {
2434 if (flags & LLE_EXCLUSIVE)
2444 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle,
2445 struct sysctl_req *wr)
2447 struct ifnet *ifp = llt->llt_ifp;
2450 struct rt_msghdr rtm;
2451 struct sockaddr_in6 sin6;
2453 * ndp.c assumes that sdl is word aligned
2458 struct sockaddr_dl sdl;
2460 struct sockaddr_dl *sdl;
2463 bzero(&ndpc, sizeof(ndpc));
2464 /* skip deleted entries */
2465 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED)
2467 /* Skip if jailed and not a valid IP of the prison. */
2468 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6);
2469 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0)
2472 * produce a msg made of:
2474 * struct sockaddr_in6 (IPv6)
2475 * struct sockaddr_dl;
2477 ndpc.rtm.rtm_msglen = sizeof(ndpc);
2478 ndpc.rtm.rtm_version = RTM_VERSION;
2479 ndpc.rtm.rtm_type = RTM_GET;
2480 ndpc.rtm.rtm_flags = RTF_UP;
2481 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY;
2482 sa6_recoverscope(&ndpc.sin6);
2485 if (lle->la_flags & LLE_PUB)
2486 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE;
2489 sdl->sdl_family = AF_LINK;
2490 sdl->sdl_len = sizeof(*sdl);
2491 sdl->sdl_index = ifp->if_index;
2492 sdl->sdl_type = ifp->if_type;
2493 if ((lle->la_flags & LLE_VALID) == LLE_VALID) {
2494 sdl->sdl_alen = ifp->if_addrlen;
2495 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen);
2498 bzero(LLADDR(sdl), ifp->if_addrlen);
2500 if (lle->la_expire != 0)
2501 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire +
2502 lle->lle_remtime / hz + time_second - time_uptime;
2503 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA);
2504 if (lle->la_flags & LLE_STATIC)
2505 ndpc.rtm.rtm_flags |= RTF_STATIC;
2506 if (lle->la_flags & LLE_IFADDR)
2507 ndpc.rtm.rtm_flags |= RTF_PINNED;
2508 if (lle->ln_router != 0)
2509 ndpc.rtm.rtm_flags |= RTF_GATEWAY;
2510 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked;
2511 /* Store state in rmx_weight value */
2512 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state;
2513 ndpc.rtm.rtm_index = ifp->if_index;
2514 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc));
2520 in6_lltable_post_resolved(struct lltable *llt, struct llentry *lle)
2522 /* Join the solicited multicast group for dst. */
2523 if ((lle->la_flags & LLE_PUB) == LLE_PUB)
2524 in6_join_proxy_ndp_mc(llt->llt_ifp, &lle->r_l3addr.addr6);
2527 static struct lltable *
2528 in6_lltattach(struct ifnet *ifp)
2530 struct lltable *llt;
2532 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE);
2533 llt->llt_af = AF_INET6;
2536 llt->llt_lookup = in6_lltable_lookup;
2537 llt->llt_alloc_entry = in6_lltable_alloc;
2538 llt->llt_delete_entry = in6_lltable_delete_entry;
2539 llt->llt_dump_entry = in6_lltable_dump_entry;
2540 llt->llt_hash = in6_lltable_hash;
2541 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry;
2542 llt->llt_free_entry = in6_lltable_free_entry;
2543 llt->llt_match_prefix = in6_lltable_match_prefix;
2544 llt->llt_mark_used = llentry_mark_used;
2545 llt->llt_post_resolved = in6_lltable_post_resolved;
2552 in6_lltable_get(struct ifnet *ifp)
2554 struct lltable *llt = NULL;
2556 void *afdata_ptr = ifp->if_afdata[AF_INET6];
2557 if (afdata_ptr != NULL)
2558 llt = ((struct in6_ifextra *)afdata_ptr)->lltable;
2563 in6_domifattach(struct ifnet *ifp)
2565 struct in6_ifextra *ext;
2567 /* There are not IPv6-capable interfaces. */
2568 switch (ifp->if_type) {
2574 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK);
2575 bzero(ext, sizeof(*ext));
2577 ext->in6_ifstat = malloc(sizeof(counter_u64_t) *
2578 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK);
2579 COUNTER_ARRAY_ALLOC(ext->in6_ifstat,
2580 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK);
2582 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) *
2583 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR,
2585 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat,
2586 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK);
2588 ext->nd_ifinfo = nd6_ifattach(ifp);
2589 ext->scope6_id = scope6_ifattach(ifp);
2590 ext->lltable = in6_lltattach(ifp);
2592 ext->mld_ifinfo = mld_domifattach(ifp);
2598 in6_domifmtu(struct ifnet *ifp)
2600 if (ifp->if_afdata[AF_INET6] == NULL)
2603 return (IN6_LINKMTU(ifp));
2607 in6_domifdetach(struct ifnet *ifp, void *aux)
2609 struct in6_ifextra *ext = (struct in6_ifextra *)aux;
2611 mld_domifdetach(ifp);
2612 scope6_ifdetach(ext->scope6_id);
2613 nd6_ifdetach(ifp, ext->nd_ifinfo);
2614 lltable_free(ext->lltable);
2615 COUNTER_ARRAY_FREE(ext->in6_ifstat,
2616 sizeof(struct in6_ifstat) / sizeof(uint64_t));
2617 free(ext->in6_ifstat, M_IFADDR);
2618 COUNTER_ARRAY_FREE(ext->icmp6_ifstat,
2619 sizeof(struct icmp6_ifstat) / sizeof(uint64_t));
2620 free(ext->icmp6_ifstat, M_IFADDR);
2621 free(ext, M_IFADDR);
2625 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
2626 * v4 mapped addr or v4 compat addr
2629 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2632 bzero(sin, sizeof(*sin));
2633 sin->sin_len = sizeof(struct sockaddr_in);
2634 sin->sin_family = AF_INET;
2635 sin->sin_port = sin6->sin6_port;
2636 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
2639 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */
2641 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
2643 bzero(sin6, sizeof(*sin6));
2644 sin6->sin6_len = sizeof(struct sockaddr_in6);
2645 sin6->sin6_family = AF_INET6;
2646 sin6->sin6_port = sin->sin_port;
2647 sin6->sin6_addr.s6_addr32[0] = 0;
2648 sin6->sin6_addr.s6_addr32[1] = 0;
2649 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
2650 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
2653 /* Convert sockaddr_in6 into sockaddr_in. */
2655 in6_sin6_2_sin_in_sock(struct sockaddr *nam)
2657 struct sockaddr_in *sin_p;
2658 struct sockaddr_in6 sin6;
2661 * Save original sockaddr_in6 addr and convert it
2664 sin6 = *(struct sockaddr_in6 *)nam;
2665 sin_p = (struct sockaddr_in *)nam;
2666 in6_sin6_2_sin(sin_p, &sin6);
2669 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */
2671 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
2673 struct sockaddr_in *sin_p;
2674 struct sockaddr_in6 *sin6_p;
2676 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK);
2677 sin_p = (struct sockaddr_in *)*nam;
2678 in6_sin_2_v4mapsin6(sin_p, sin6_p);
2679 free(*nam, M_SONAME);
2680 *nam = (struct sockaddr *)sin6_p;
2684 * Join/leave the solicited multicast groups for proxy NDP entries.
2687 in6_join_proxy_ndp_mc(struct ifnet *ifp, const struct in6_addr *dst)
2689 struct in6_multi *inm;
2690 struct in6_addr mltaddr;
2691 char ip6buf[INET6_ADDRSTRLEN];
2694 if (in6_solicited_node_maddr(&mltaddr, ifp, dst) != 0)
2695 return; /* error logged in in6_solicited_node_maddr. */
2697 error = in6_joingroup(ifp, &mltaddr, NULL, &inm, 0);
2699 nd6log((LOG_WARNING,
2700 "%s: in6_joingroup failed for %s on %s (errno=%d)\n",
2701 __func__, ip6_sprintf(ip6buf, &mltaddr), if_name(ifp),
2707 in6_leave_proxy_ndp_mc(struct ifnet *ifp, const struct in6_addr *dst)
2709 struct epoch_tracker et;
2710 struct in6_multi *inm;
2711 struct in6_addr mltaddr;
2712 char ip6buf[INET6_ADDRSTRLEN];
2714 if (in6_solicited_node_maddr(&mltaddr, ifp, dst) != 0)
2715 return; /* error logged in in6_solicited_node_maddr. */
2717 NET_EPOCH_ENTER(et);
2718 inm = in6m_lookup(ifp, &mltaddr);
2721 in6_leavegroup(inm, NULL);
2723 nd6log((LOG_WARNING, "%s: in6m_lookup failed for %s on %s\n",
2724 __func__, ip6_sprintf(ip6buf, &mltaddr), if_name(ifp)));
2728 in6_lle_match_pub(struct lltable *llt, struct llentry *lle, void *farg)
2730 return ((lle->la_flags & LLE_PUB) != 0);
2734 in6_purge_proxy_ndp(struct ifnet *ifp)
2736 struct lltable *llt;
2739 if (ifp->if_afdata[AF_INET6] == NULL)
2742 llt = LLTABLE6(ifp);
2743 IF_AFDATA_WLOCK(ifp);
2744 need_purge = ((llt->llt_flags & LLT_ADDEDPROXY) != 0);
2745 IF_AFDATA_WUNLOCK(ifp);
2748 * Ever added proxy ndp entries, leave solicited node multicast
2749 * before deleting the llentry.
2752 lltable_delete_conditional(llt, in6_lle_match_pub, NULL);