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4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 | /* * Copyright (c) 2003-2023 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (c) 1982, 1986, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)in.c 8.2 (Berkeley) 11/15/93 */ #include <sys/param.h> #include <sys/ioctl.h> #include <sys/errno.h> #include <sys/malloc.h> #include <sys/socket.h> #include <sys/socketvar.h> #include <sys/sockio.h> #include <sys/systm.h> #include <sys/time.h> #include <sys/kernel.h> #include <sys/syslog.h> #include <sys/kern_event.h> #include <sys/mcache.h> #include <sys/protosw.h> #include <kern/locks.h> #include <kern/zalloc.h> #include <libkern/OSAtomic.h> #include <machine/machine_routines.h> #include <mach/boolean.h> #include <net/if.h> #include <net/if_types.h> #include <net/if_var.h> #include <net/route.h> #include <net/if_dl.h> #include <net/kpi_protocol.h> #include <net/nwk_wq.h> #include <netinet/in.h> #include <netinet/in_var.h> #include <netinet/if_ether.h> #include <netinet/in_systm.h> #include <netinet/ip.h> #include <netinet/in_pcb.h> #include <netinet/icmp6.h> #include <netinet/tcp.h> #include <netinet/tcp_seq.h> #include <netinet/tcp_var.h> #include <netinet6/nd6.h> #include <netinet/ip6.h> #include <netinet6/ip6_var.h> #include <netinet6/mld6_var.h> #include <netinet6/in6_ifattach.h> #include <netinet6/scope6_var.h> #include <netinet6/in6_var.h> #include <netinet6/in6_pcb.h> #include <net/net_osdep.h> #include <net/dlil.h> #if PF #include <net/pfvar.h> #endif /* PF */ #include <net/sockaddr_utils.h> /* * Definitions of some constant IP6 addresses. */ const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; const struct in6_addr in6addr_nodelocal_allnodes = IN6ADDR_NODELOCAL_ALLNODES_INIT; const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; const struct in6_addr in6addr_linklocal_allv2routers = IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; const struct in6_addr in6addr_multicast_prefix = IN6ADDR_MULTICAST_PREFIX; const struct in6_addr in6mask0 = IN6MASK0; const struct in6_addr in6mask7 = IN6MASK7; const struct in6_addr in6mask8 = IN6MASK8; const struct in6_addr in6mask16 = IN6MASK16; const struct in6_addr in6mask32 = IN6MASK32; const struct in6_addr in6mask64 = IN6MASK64; const struct in6_addr in6mask96 = IN6MASK96; const struct in6_addr in6mask128 = IN6MASK128; const struct sockaddr_in6 sa6_any = { .sin6_len = sizeof(sa6_any), .sin6_family = AF_INET6, .sin6_port = 0, .sin6_flowinfo = 0, .sin6_addr = IN6ADDR_ANY_INIT, .sin6_scope_id = 0 }; static int in6ctl_associd(struct socket *, u_long, caddr_t __indexable); static int in6ctl_connid(struct socket *, u_long, caddr_t __indexable); static int in6ctl_conninfo(struct socket *, u_long, caddr_t __indexable); static int in6ctl_llstart(struct ifnet *, u_long, caddr_t __indexable); static int in6ctl_llstop(struct ifnet *); static int in6ctl_cgastart(struct ifnet *, u_long, caddr_t __indexable); static int in6ctl_gifaddr(struct ifnet *, struct in6_ifaddr *, u_long, struct in6_ifreq *); static int in6ctl_gifstat(struct ifnet *, u_long, struct in6_ifreq *); static int in6ctl_alifetime(struct in6_ifaddr *, u_long, struct in6_ifreq *, boolean_t); static int in6ctl_aifaddr(struct ifnet *, struct in6_aliasreq *); static void in6ctl_difaddr(struct ifnet *, struct in6_ifaddr *); static int in6_autoconf(struct ifnet *, int); static int in6_setrouter(struct ifnet *, ipv6_router_mode_t); static int in6_ifinit(struct ifnet *, struct in6_ifaddr *, int); static int in6_ifaupdate_aux(struct in6_ifaddr *, struct ifnet *, int); static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); static struct in6_ifaddr *in6_ifaddr_alloc(zalloc_flags_t); static void in6_ifaddr_free(struct ifaddr *); #if defined(__LP64__) static void in6_cgareq_32_to_64(const struct in6_cgareq_32 *, struct in6_cgareq_64 *); #else static void in6_cgareq_64_to_32(const struct in6_cgareq_64 *, struct in6_cgareq_32 *); #endif static struct in6_aliasreq *in6_aliasreq_to_native(void *__indexable, int, struct in6_aliasreq *); static int in6_to_kamescope(struct sockaddr_in6 *, struct ifnet *); static int in6_getassocids(struct socket *, uint32_t *, user_addr_t); static int in6_getconnids(struct socket *, sae_associd_t, uint32_t *, user_addr_t); static void in6_if_up_dad_start(struct ifnet *); #define IA6_HASH_INIT(ia) { \ (ia)->ia6_hash.tqe_next = __unsafe_forge_single(void *, ~(uintptr_t)0); \ (ia)->ia6_hash.tqe_prev = __unsafe_forge_single(void *, ~(uintptr_t)0); \ } #define IA6_IS_HASHED(ia) \ (!((ia)->ia6_hash.tqe_next == __unsafe_forge_single(void *, ~(uintptr_t)0) || \ (ia)->ia6_hash.tqe_prev == __unsafe_forge_single(void *, ~(uintptr_t)0))) static void in6_iahash_remove(struct in6_ifaddr *); static void in6_iahash_insert(struct in6_ifaddr *); static void in6_iahash_insert_ptp(struct in6_ifaddr *); struct eventhandler_lists_ctxt in6_evhdlr_ctxt; struct eventhandler_lists_ctxt in6_clat46_evhdlr_ctxt; /* * Subroutine for in6_ifaddloop() and in6_ifremloop(). * This routine does actual work. */ static void in6_ifloop_request(int cmd, struct ifaddr *ifa) { struct sockaddr_in6 all1_sa; rtentry_ref_t nrt = NULL; int e; SOCKADDR_ZERO(&all1_sa, sizeof(all1_sa)); all1_sa.sin6_family = AF_INET6; all1_sa.sin6_len = sizeof(struct sockaddr_in6); all1_sa.sin6_addr = in6mask128; /* * We specify the address itself as the gateway, and set the * RTF_LLINFO flag, so that the corresponding host route would have * the flag, and thus applications that assume traditional behavior * would be happy. Note that we assume the caller of the function * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest, * which changes the outgoing interface to the loopback interface. * ifa_addr for INET6 is set once during init; no need to hold lock. */ lck_mtx_lock(rnh_lock); e = rtrequest_locked(cmd, ifa->ifa_addr, ifa->ifa_addr, SA(&all1_sa), RTF_UP | RTF_HOST | RTF_LLINFO, &nrt); if (e != 0) { log(LOG_ERR, "in6_ifloop_request: " "%s operation failed for %s (errno=%d)\n", cmd == RTM_ADD ? "ADD" : "DELETE", ip6_sprintf(&(ifatoia6(ifa))->ia_addr.sin6_addr), e); } if (nrt != NULL) { RT_LOCK(nrt); } /* * Make sure rt_ifa be equal to IFA, the second argument of the * function. * We need this because when we refer to rt_ifa->ia6_flags in * ip6_input, we assume that the rt_ifa points to the address instead * of the loopback address. */ if (cmd == RTM_ADD && nrt && ifa != nrt->rt_ifa) { rtsetifa(nrt, ifa); } /* * Report the addition/removal of the address to the routing socket. * XXX: since we called rtinit for a p2p interface with a destination, * we end up reporting twice in such a case. Should we rather * omit the second report? */ if (nrt != NULL) { rt_newaddrmsg((u_char)cmd, ifa, e, nrt); if (cmd == RTM_DELETE) { RT_UNLOCK(nrt); rtfree_locked(nrt); } else { /* the cmd must be RTM_ADD here */ RT_REMREF_LOCKED(nrt); RT_UNLOCK(nrt); } } lck_mtx_unlock(rnh_lock); } /* * Add ownaddr as loopback rtentry. We previously add the route only if * necessary (ex. on a p2p link). However, since we now manage addresses * separately from prefixes, we should always add the route. We can't * rely on the cloning mechanism from the corresponding interface route * any more. */ static void in6_ifaddloop(struct ifaddr *ifa) { rtentry_ref_t rt; /* * If there is no loopback entry, allocate one. ifa_addr for * INET6 is set once during init; no need to hold lock. */ rt = rtalloc1(ifa->ifa_addr, 0, 0); if (rt != NULL) { RT_LOCK(rt); } if (rt == NULL || (rt->rt_flags & RTF_HOST) == 0 || (rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) { if (rt != NULL) { RT_REMREF_LOCKED(rt); RT_UNLOCK(rt); } in6_ifloop_request(RTM_ADD, ifa); } else if (rt != NULL) { RT_REMREF_LOCKED(rt); RT_UNLOCK(rt); } } /* * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(), * if it exists. */ static void in6_ifremloop(struct ifaddr *ifa) { struct in6_ifaddr *__single ia; rtentry_ref_t rt; int ia_count = 0; /* * Some of BSD variants do not remove cloned routes * from an interface direct route, when removing the direct route * (see comments in net/net_osdep.h). Even for variants that do remove * cloned routes, they could fail to remove the cloned routes when * we handle multple addresses that share a common prefix. * So, we should remove the route corresponding to the deleted address * regardless of the result of in6_is_ifloop_auto(). */ /* * Delete the entry only if exact one ifa exists. More than one ifa * can exist if we assign a same single address to multiple * (probably p2p) interfaces. * XXX: we should avoid such a configuration in IPv6... */ lck_rw_lock_exclusive(&in6_ifaddr_rwlock); TAILQ_FOREACH(ia, IN6ADDR_HASH(IFA_IN6(ifa)), ia6_hash) { IFA_LOCK(&ia->ia_ifa); if (in6_are_addr_equal_scoped(IFA_IN6(ifa), &ia->ia_addr.sin6_addr, IFA_SIN6(ifa)->sin6_scope_id, ia->ia_addr.sin6_scope_id)) { ia_count++; if (ia_count > 1) { IFA_UNLOCK(&ia->ia_ifa); break; } } IFA_UNLOCK(&ia->ia_ifa); } lck_rw_done(&in6_ifaddr_rwlock); if (ia_count == 1) { /* * Before deleting, check if a corresponding loopbacked host * route surely exists. With this check, we can avoid to * delete an interface direct route whose destination is same * as the address being removed. This can happen when removing * a subnet-router anycast address on an interface attahced * to a shared medium. ifa_addr for INET6 is set once during * init; no need to hold lock. */ rt = rtalloc1(ifa->ifa_addr, 0, 0); if (rt != NULL) { RT_LOCK(rt); if ((rt->rt_flags & RTF_HOST) != 0 && (rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) { RT_REMREF_LOCKED(rt); RT_UNLOCK(rt); in6_ifloop_request(RTM_DELETE, ifa); } else { RT_UNLOCK(rt); } } } } int in6_mask2len(struct in6_addr *mask, u_char *__counted_by(0) lim0) { int x = 0, y; u_char *lim = lim0, *p; /* ignore the scope_id part */ if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) { lim = (u_char *)(struct in6_addr *__indexable)mask + sizeof(*mask); } for (p = (u_char *)(struct in6_addr *__indexable)mask; p < lim; x++, p++) { if (*p != 0xff) { break; } } y = 0; if (p < lim) { for (y = 0; y < 8; y++) { if ((*p & (0x80 >> y)) == 0) { break; } } } /* * when the limit pointer is given, do a stricter check on the * remaining bits. */ if (p < lim) { if (y != 0 && (*p & (0x00ff >> y)) != 0) { return -1; } for (p = p + 1; p < lim; p++) { if (*p != 0) { return -1; } } } return x * 8 + y; } void in6_len2mask(struct in6_addr *mask, int len) { int i; bzero(mask, sizeof(*mask)); for (i = 0; i < len / 8; i++) { mask->s6_addr8[i] = 0xff; } if (len % 8) { mask->s6_addr8[i] = (0xff00 >> (len % 8)) & 0xff; } } void in6_aliasreq_64_to_32(struct in6_aliasreq_64 *src, struct in6_aliasreq_32 *dst) { bzero(dst, sizeof(*dst)); bcopy(src->ifra_name, dst->ifra_name, sizeof(dst->ifra_name)); dst->ifra_addr = src->ifra_addr; dst->ifra_dstaddr = src->ifra_dstaddr; dst->ifra_prefixmask = src->ifra_prefixmask; dst->ifra_flags = src->ifra_flags; dst->ifra_lifetime.ia6t_expire = (u_int32_t)src->ifra_lifetime.ia6t_expire; dst->ifra_lifetime.ia6t_preferred = (u_int32_t)src->ifra_lifetime.ia6t_preferred; dst->ifra_lifetime.ia6t_vltime = src->ifra_lifetime.ia6t_vltime; dst->ifra_lifetime.ia6t_pltime = src->ifra_lifetime.ia6t_pltime; } void in6_aliasreq_32_to_64(struct in6_aliasreq_32 *src, struct in6_aliasreq_64 *dst) { bzero(dst, sizeof(*dst)); bcopy(src->ifra_name, dst->ifra_name, sizeof(dst->ifra_name)); dst->ifra_addr = src->ifra_addr; dst->ifra_dstaddr = src->ifra_dstaddr; dst->ifra_prefixmask = src->ifra_prefixmask; dst->ifra_flags = src->ifra_flags; dst->ifra_lifetime.ia6t_expire = src->ifra_lifetime.ia6t_expire; dst->ifra_lifetime.ia6t_preferred = src->ifra_lifetime.ia6t_preferred; dst->ifra_lifetime.ia6t_vltime = src->ifra_lifetime.ia6t_vltime; dst->ifra_lifetime.ia6t_pltime = src->ifra_lifetime.ia6t_pltime; } #if defined(__LP64__) static void in6_cgareq_32_to_64(const struct in6_cgareq_32 *src, struct in6_cgareq_64 *dst) { bzero(dst, sizeof(*dst)); bcopy(src->cgar_name, dst->cgar_name, sizeof(dst->cgar_name)); dst->cgar_flags = src->cgar_flags; bcopy(src->cgar_cgaprep.cga_modifier.octets, dst->cgar_cgaprep.cga_modifier.octets, sizeof(dst->cgar_cgaprep.cga_modifier.octets)); dst->cgar_cgaprep.cga_security_level = src->cgar_cgaprep.cga_security_level; dst->cgar_lifetime.ia6t_expire = src->cgar_lifetime.ia6t_expire; dst->cgar_lifetime.ia6t_preferred = src->cgar_lifetime.ia6t_preferred; dst->cgar_lifetime.ia6t_vltime = src->cgar_lifetime.ia6t_vltime; dst->cgar_lifetime.ia6t_pltime = src->cgar_lifetime.ia6t_pltime; dst->cgar_collision_count = src->cgar_collision_count; } #endif #if !defined(__LP64__) static void in6_cgareq_64_to_32(const struct in6_cgareq_64 *src, struct in6_cgareq_32 *dst) { bzero(dst, sizeof(*dst)); bcopy(src->cgar_name, dst->cgar_name, sizeof(dst->cgar_name)); dst->cgar_flags = src->cgar_flags; bcopy(src->cgar_cgaprep.cga_modifier.octets, dst->cgar_cgaprep.cga_modifier.octets, sizeof(dst->cgar_cgaprep.cga_modifier.octets)); dst->cgar_cgaprep.cga_security_level = src->cgar_cgaprep.cga_security_level; dst->cgar_lifetime.ia6t_expire = (u_int32_t)src->cgar_lifetime.ia6t_expire; dst->cgar_lifetime.ia6t_preferred = (u_int32_t)src->cgar_lifetime.ia6t_preferred; dst->cgar_lifetime.ia6t_vltime = src->cgar_lifetime.ia6t_vltime; dst->cgar_lifetime.ia6t_pltime = src->cgar_lifetime.ia6t_pltime; dst->cgar_collision_count = src->cgar_collision_count; } #endif static struct in6_aliasreq * in6_aliasreq_to_native(void *__indexable data, int data_is_64, struct in6_aliasreq *dst) { #if defined(__LP64__) if (data_is_64) { bcopy(data, dst, sizeof(*dst)); } else { in6_aliasreq_32_to_64((struct in6_aliasreq_32 *)data, (struct in6_aliasreq_64 *)dst); } #else if (data_is_64) { in6_aliasreq_64_to_32((struct in6_aliasreq_64 *)data, (struct in6_aliasreq_32 *)dst); } else { bcopy(data, dst, sizeof(*dst)); } #endif /* __LP64__ */ return dst; } void in6_cgareq_copy_from_user32(const void *__sized_by(sizeof(struct in6_cgareq_32))user_data, struct in6_cgareq *cgareq) { #if defined(__LP64__) in6_cgareq_32_to_64((const struct in6_cgareq_32 *)user_data, (struct in6_cgareq_64 *)cgareq); #else bcopy(user_data, cgareq, sizeof(*cgareq)); #endif /* __LP64__ */ } void in6_cgareq_copy_from_user64(const void *__sized_by(sizeof(struct in6_cgareq_64))user_data, struct in6_cgareq *cgareq) { #if defined(__LP64__) bcopy(user_data, cgareq, sizeof(*cgareq)); #else in6_cgareq_64_to_32((const struct in6_cgareq_64 *)user_data, (struct in6_cgareq_32 *)cgareq); #endif /* __LP64__ */ } static __attribute__((noinline)) int in6ctl_associd(struct socket *so, u_long cmd, caddr_t __indexable data) { int error = 0; union { struct so_aidreq32 a32; struct so_aidreq64 a64; } u; VERIFY(so != NULL); switch (cmd) { case SIOCGASSOCIDS32: { /* struct so_aidreq32 */ bcopy(data, &u.a32, sizeof(u.a32)); error = in6_getassocids(so, &u.a32.sar_cnt, u.a32.sar_aidp); if (error == 0) { bcopy(&u.a32, data, sizeof(u.a32)); } break; } case SIOCGASSOCIDS64: { /* struct so_aidreq64 */ bcopy(data, &u.a64, sizeof(u.a64)); error = in6_getassocids(so, &u.a64.sar_cnt, (user_addr_t)u.a64.sar_aidp); if (error == 0) { bcopy(&u.a64, data, sizeof(u.a64)); } break; } default: VERIFY(0); /* NOTREACHED */ } return error; } static __attribute__((noinline)) int in6ctl_connid(struct socket *so, u_long cmd, caddr_t __indexable data) { int error = 0; union { struct so_cidreq32 c32; struct so_cidreq64 c64; } u; VERIFY(so != NULL); switch (cmd) { case SIOCGCONNIDS32: { /* struct so_cidreq32 */ bcopy(data, &u.c32, sizeof(u.c32)); error = in6_getconnids(so, u.c32.scr_aid, &u.c32.scr_cnt, u.c32.scr_cidp); if (error == 0) { bcopy(&u.c32, data, sizeof(u.c32)); } break; } case SIOCGCONNIDS64: { /* struct so_cidreq64 */ bcopy(data, &u.c64, sizeof(u.c64)); error = in6_getconnids(so, u.c64.scr_aid, &u.c64.scr_cnt, (user_addr_t)u.c64.scr_cidp); if (error == 0) { bcopy(&u.c64, data, sizeof(u.c64)); } break; } default: VERIFY(0); /* NOTREACHED */ } return error; } static __attribute__((noinline)) int in6ctl_conninfo(struct socket *so, u_long cmd, caddr_t __indexable data) { int error = 0; union { struct so_cinforeq32 ci32; struct so_cinforeq64 ci64; } u; VERIFY(so != NULL); switch (cmd) { case SIOCGCONNINFO32: { /* struct so_cinforeq32 */ bcopy(data, &u.ci32, sizeof(u.ci32)); error = in6_getconninfo(so, u.ci32.scir_cid, &u.ci32.scir_flags, &u.ci32.scir_ifindex, &u.ci32.scir_error, u.ci32.scir_src, &u.ci32.scir_src_len, u.ci32.scir_dst, &u.ci32.scir_dst_len, &u.ci32.scir_aux_type, u.ci32.scir_aux_data, &u.ci32.scir_aux_len); if (error == 0) { bcopy(&u.ci32, data, sizeof(u.ci32)); } break; } case SIOCGCONNINFO64: { /* struct so_cinforeq64 */ bcopy(data, &u.ci64, sizeof(u.ci64)); error = in6_getconninfo(so, u.ci64.scir_cid, &u.ci64.scir_flags, &u.ci64.scir_ifindex, &u.ci64.scir_error, (user_addr_t)u.ci64.scir_src, &u.ci64.scir_src_len, (user_addr_t)u.ci64.scir_dst, &u.ci64.scir_dst_len, &u.ci64.scir_aux_type, (user_addr_t)u.ci64.scir_aux_data, &u.ci64.scir_aux_len); if (error == 0) { bcopy(&u.ci64, data, sizeof(u.ci64)); } break; } default: VERIFY(0); /* NOTREACHED */ } return error; } static __attribute__((noinline)) int in6ctl_llstart(struct ifnet *ifp, u_long cmd, caddr_t __indexable data) { struct in6_aliasreq sifra; struct in6_aliasreq *__single ifra = NULL; boolean_t is64; int error = 0; VERIFY(ifp != NULL); switch (cmd) { case SIOCLL_START_32: /* struct in6_aliasreq_32 */ case SIOCLL_START_64: /* struct in6_aliasreq_64 */ is64 = (cmd == SIOCLL_START_64); /* * Convert user ifra to the kernel form, when appropriate. * This allows the conversion between different data models * to be centralized, so that it can be passed around to other * routines that are expecting the kernel form. */ ifra = in6_aliasreq_to_native(data, is64, &sifra); /* * NOTE: All the interface specific DLIL attachements should * be done here. They are currently done in in6_ifattach_aux() * for the interfaces that need it. */ if (ifra->ifra_addr.sin6_family == AF_INET6 && /* Only check ifra_dstaddr if valid */ (ifra->ifra_dstaddr.sin6_len == 0 || ifra->ifra_dstaddr.sin6_family == AF_INET6)) { /* some interfaces may provide LinkLocal addresses */ error = in6_ifattach_aliasreq(ifp, NULL, ifra); } else { error = in6_ifattach_aliasreq(ifp, NULL, NULL); } if (error == 0) { in6_if_up_dad_start(ifp); } break; default: VERIFY(0); /* NOTREACHED */ } return error; } static __attribute__((noinline)) int in6ctl_llstop(struct ifnet *ifp) { struct in6_ifaddr *ia; struct nd_prefix pr0, *pr; VERIFY(ifp != NULL); /* Remove link local addresses from interface */ lck_rw_lock_exclusive(&in6_ifaddr_rwlock); boolean_t from_begining = TRUE; while (from_begining) { from_begining = FALSE; TAILQ_FOREACH(ia, &in6_ifaddrhead, ia6_link) { if (ia->ia_ifa.ifa_ifp != ifp) { continue; } IFA_LOCK(&ia->ia_ifa); if (IN6_IS_ADDR_LINKLOCAL(&ia->ia_addr.sin6_addr)) { ifa_addref(&ia->ia_ifa); /* for us */ IFA_UNLOCK(&ia->ia_ifa); lck_rw_done(&in6_ifaddr_rwlock); in6_purgeaddr(&ia->ia_ifa); ifa_remref(&ia->ia_ifa); /* for us */ lck_rw_lock_exclusive(&in6_ifaddr_rwlock); /* * Purging the address caused in6_ifaddr_rwlock * to be dropped and reacquired; * therefore search again from the beginning * of in6_ifaddrs list. */ from_begining = TRUE; break; } IFA_UNLOCK(&ia->ia_ifa); } } lck_rw_done(&in6_ifaddr_rwlock); /* Delete the link local prefix */ bzero(&pr0, sizeof(pr0)); pr0.ndpr_plen = 64; pr0.ndpr_ifp = ifp; pr0.ndpr_prefix.sin6_addr.s6_addr16[0] = IPV6_ADDR_INT16_ULL; (void)in6_setscope(&pr0.ndpr_prefix.sin6_addr, ifp, IN6_NULL_IF_EMBEDDED_SCOPE(&pr0.ndpr_prefix.sin6_scope_id)); pr = nd6_prefix_lookup(&pr0, ND6_PREFIX_EXPIRY_UNSPEC); if (pr) { lck_mtx_lock(nd6_mutex); nd_prefix_busy_wait(); NDPR_LOCK(pr); prelist_remove(pr); NDPR_UNLOCK(pr); NDPR_REMREF(pr); /* Drop the reference from lookup */ nd_prefix_busy_signal(); lck_mtx_unlock(nd6_mutex); } return 0; } /* * This routine configures secure link local address */ static __attribute__((noinline)) int in6ctl_cgastart(struct ifnet *ifp, u_long cmd, caddr_t __indexable data) { struct in6_cgareq llcgasr; int error = 0; VERIFY(ifp != NULL); switch (cmd) { case SIOCLL_CGASTART_32: /* struct in6_cgareq_32 */ case SIOCLL_CGASTART_64: /* struct in6_cgareq_64 */ /* * Convert user cgareq to the kernel form, when appropriate. * This allows the conversion between different data models * to be centralized, so that it can be passed around to other * routines that are expecting the kernel form. */ if (cmd == SIOCLL_CGASTART_64) { in6_cgareq_copy_from_user64(data, &llcgasr); } else { in6_cgareq_copy_from_user32(data, &llcgasr); } /* * NOTE: All the interface specific DLIL attachements * should be done here. They are currently done in * in6_ifattach_cgareq() for the interfaces that * need it. */ error = in6_ifattach_llcgareq(ifp, &llcgasr); if (error == 0) { in6_if_up_dad_start(ifp); } break; default: VERIFY(0); /* NOTREACHED */ } return error; } /* * Caller passes in the ioctl data pointer directly via "ifr", with the * expectation that this routine always uses bcopy() or other byte-aligned * memory accesses. */ static __attribute__((noinline)) int in6ctl_gifaddr(struct ifnet *ifp, struct in6_ifaddr *ia, u_long cmd, struct in6_ifreq *ifr) { struct sockaddr_in6 addr; int error = 0; VERIFY(ifp != NULL); if (ia == NULL) { return EADDRNOTAVAIL; } switch (cmd) { case SIOCGIFADDR_IN6: /* struct in6_ifreq */ IFA_LOCK(&ia->ia_ifa); SOCKADDR_COPY(&ia->ia_addr, &addr, sizeof(addr)); IFA_UNLOCK(&ia->ia_ifa); if ((error = sa6_recoverscope(&addr, TRUE)) != 0) { break; } SOCKADDR_COPY(&addr, &ifr->ifr_addr, sizeof(addr)); break; case SIOCGIFDSTADDR_IN6: /* struct in6_ifreq */ if (!(ifp->if_flags & IFF_POINTOPOINT)) { error = EINVAL; break; } /* * XXX: should we check if ifa_dstaddr is NULL and return * an error? */ IFA_LOCK(&ia->ia_ifa); SOCKADDR_COPY(&ia->ia_dstaddr, &addr, sizeof(addr)); IFA_UNLOCK(&ia->ia_ifa); if ((error = sa6_recoverscope(&addr, TRUE)) != 0) { break; } SOCKADDR_COPY(&addr, &ifr->ifr_dstaddr, sizeof(addr)); break; default: VERIFY(0); /* NOTREACHED */ } return error; } /* * Caller passes in the ioctl data pointer directly via "ifr", with the * expectation that this routine always uses bcopy() or other byte-aligned * memory accesses. */ static __attribute__((noinline)) int in6ctl_gifstat(struct ifnet *ifp, u_long cmd, struct in6_ifreq *ifr) { int error = 0, index; VERIFY(ifp != NULL); index = ifp->if_index; switch (cmd) { case SIOCGIFSTAT_IN6: /* struct in6_ifreq */ /* N.B.: if_inet6data is never freed once set. */ if (IN6_IFEXTRA(ifp) == NULL) { /* return (EAFNOSUPPORT)? */ bzero(&ifr->ifr_ifru.ifru_stat, sizeof(ifr->ifr_ifru.ifru_stat)); } else { bcopy(&IN6_IFEXTRA(ifp)->in6_ifstat, &ifr->ifr_ifru.ifru_stat, sizeof(ifr->ifr_ifru.ifru_stat)); } break; case SIOCGIFSTAT_ICMP6: /* struct in6_ifreq */ /* N.B.: if_inet6data is never freed once set. */ if (IN6_IFEXTRA(ifp) == NULL) { /* return (EAFNOSUPPORT)? */ bzero(&ifr->ifr_ifru.ifru_icmp6stat, sizeof(ifr->ifr_ifru.ifru_icmp6stat)); } else { bcopy(&IN6_IFEXTRA(ifp)->icmp6_ifstat, &ifr->ifr_ifru.ifru_icmp6stat, sizeof(ifr->ifr_ifru.ifru_icmp6stat)); } break; default: VERIFY(0); /* NOTREACHED */ } return error; } /* * Caller passes in the ioctl data pointer directly via "ifr", with the * expectation that this routine always uses bcopy() or other byte-aligned * memory accesses. */ static __attribute__((noinline)) int in6ctl_alifetime(struct in6_ifaddr *ia, u_long cmd, struct in6_ifreq *ifr, boolean_t p64) { uint64_t timenow = net_uptime(); struct in6_addrlifetime ia6_lt; struct timeval caltime; int error = 0; if (ia == NULL) { return EADDRNOTAVAIL; } switch (cmd) { case SIOCGIFALIFETIME_IN6: /* struct in6_ifreq */ IFA_LOCK(&ia->ia_ifa); /* retrieve time as calendar time (last arg is 1) */ in6ifa_getlifetime(ia, &ia6_lt, 1); if (p64) { struct in6_addrlifetime_64 lt; bzero(<, sizeof(lt)); lt.ia6t_expire = ia6_lt.ia6t_expire; lt.ia6t_preferred = ia6_lt.ia6t_preferred; lt.ia6t_vltime = ia6_lt.ia6t_vltime; lt.ia6t_pltime = ia6_lt.ia6t_pltime; bcopy(<, &ifr->ifr_ifru.ifru_lifetime, sizeof(ifr->ifr_ifru.ifru_lifetime)); } else { struct in6_addrlifetime_32 lt; bzero(<, sizeof(lt)); lt.ia6t_expire = (uint32_t)ia6_lt.ia6t_expire; lt.ia6t_preferred = (uint32_t)ia6_lt.ia6t_preferred; lt.ia6t_vltime = (uint32_t)ia6_lt.ia6t_vltime; lt.ia6t_pltime = (uint32_t)ia6_lt.ia6t_pltime; /* * 32-bit userland expects a 32-bit in6_addrlifetime to * come back: */ bcopy(<, &ifr->ifr_ifru.ifru_lifetime, sizeof(lt)); } IFA_UNLOCK(&ia->ia_ifa); break; case SIOCSIFALIFETIME_IN6: /* struct in6_ifreq */ getmicrotime(&caltime); /* sanity for overflow - beware unsigned */ if (p64) { struct in6_addrlifetime_64 lt; bcopy(&ifr->ifr_ifru.ifru_lifetime, <, sizeof(lt)); if (lt.ia6t_vltime != ND6_INFINITE_LIFETIME && lt.ia6t_vltime + caltime.tv_sec < caltime.tv_sec) { error = EINVAL; break; } if (lt.ia6t_pltime != ND6_INFINITE_LIFETIME && lt.ia6t_pltime + caltime.tv_sec < caltime.tv_sec) { error = EINVAL; break; } } else { struct in6_addrlifetime_32 lt; bcopy(&ifr->ifr_ifru.ifru_lifetime, <, sizeof(lt)); if (lt.ia6t_vltime != ND6_INFINITE_LIFETIME && lt.ia6t_vltime + caltime.tv_sec < caltime.tv_sec) { error = EINVAL; break; } if (lt.ia6t_pltime != ND6_INFINITE_LIFETIME && lt.ia6t_pltime + caltime.tv_sec < caltime.tv_sec) { error = EINVAL; break; } } IFA_LOCK(&ia->ia_ifa); if (p64) { struct in6_addrlifetime_64 lt; bcopy(&ifr->ifr_ifru.ifru_lifetime, <, sizeof(lt)); ia6_lt.ia6t_expire = (time_t)lt.ia6t_expire; ia6_lt.ia6t_preferred = (time_t)lt.ia6t_preferred; ia6_lt.ia6t_vltime = lt.ia6t_vltime; ia6_lt.ia6t_pltime = lt.ia6t_pltime; } else { struct in6_addrlifetime_32 lt; bcopy(&ifr->ifr_ifru.ifru_lifetime, <, sizeof(lt)); ia6_lt.ia6t_expire = (uint32_t)lt.ia6t_expire; ia6_lt.ia6t_preferred = (uint32_t)lt.ia6t_preferred; ia6_lt.ia6t_vltime = lt.ia6t_vltime; ia6_lt.ia6t_pltime = lt.ia6t_pltime; } /* for sanity */ if (ia6_lt.ia6t_vltime != ND6_INFINITE_LIFETIME) { ia6_lt.ia6t_expire = (time_t)(timenow + ia6_lt.ia6t_vltime); } else { ia6_lt.ia6t_expire = 0; } if (ia6_lt.ia6t_pltime != ND6_INFINITE_LIFETIME) { ia6_lt.ia6t_preferred = (time_t)(timenow + ia6_lt.ia6t_pltime); } else { ia6_lt.ia6t_preferred = 0; } in6ifa_setlifetime(ia, &ia6_lt); IFA_UNLOCK(&ia->ia_ifa); break; default: VERIFY(0); /* NOTREACHED */ } return error; } static int in6ctl_clat46start(struct ifnet *ifp) { struct nd_prefix *__single pr = NULL; struct nd_prefix *__single next = NULL; struct in6_ifaddr *__single ia6 = NULL; int error = 0; if (ifp == lo_ifp) { return EINVAL; } /* * Traverse the list of prefixes and find the first non-linklocal * prefix on the interface. * For that found eligible prefix, configure a CLAT46 reserved address. */ lck_mtx_lock(nd6_mutex); for (pr = nd_prefix.lh_first; pr; pr = next) { next = pr->ndpr_next; NDPR_LOCK(pr); if (pr->ndpr_ifp != ifp) { NDPR_UNLOCK(pr); continue; } if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr)) { NDPR_UNLOCK(pr); continue; /* XXX */ } if (pr->ndpr_raf_auto == 0) { NDPR_UNLOCK(pr); continue; } if (pr->ndpr_stateflags & NDPRF_DEFUNCT) { NDPR_UNLOCK(pr); continue; } if ((pr->ndpr_stateflags & NDPRF_CLAT46) == 0 && pr->ndpr_vltime != 0) { NDPR_ADDREF(pr); /* Take reference for rest of the processing */ NDPR_UNLOCK(pr); break; } else { NDPR_UNLOCK(pr); continue; } } lck_mtx_unlock(nd6_mutex); if (pr != NULL) { if ((ia6 = in6_pfx_newpersistaddr(pr, FALSE, &error, TRUE, CLAT46_COLLISION_COUNT_OFFSET)) == NULL) { nd6log0(error, "Could not configure CLAT46 address on" " interface %s.\n", ifp->if_xname); } else { IFA_LOCK(&ia6->ia_ifa); NDPR_LOCK(pr); ia6->ia6_ndpr = pr; NDPR_ADDREF(pr); /* for addr reference */ pr->ndpr_stateflags |= NDPRF_CLAT46; pr->ndpr_addrcnt++; VERIFY(pr->ndpr_addrcnt != 0); NDPR_UNLOCK(pr); IFA_UNLOCK(&ia6->ia_ifa); ifa_remref(&ia6->ia_ifa); ia6 = NULL; /* * A newly added address might affect the status * of other addresses, so we check and update it. * XXX: what if address duplication happens? */ lck_mtx_lock(nd6_mutex); pfxlist_onlink_check(false); lck_mtx_unlock(nd6_mutex); } NDPR_REMREF(pr); } return error; } static int in6ctl_clat46stop(struct ifnet *ifp) { int error = 0; struct in6_ifaddr *__single ia = NULL; if (ifp == lo_ifp) { return EINVAL; } if ((ifp->if_eflags & IFEF_CLAT46) == 0) { /* CLAT46 isn't enabled */ goto done; } if_clear_eflags(ifp, IFEF_CLAT46); /* find CLAT46 address and remove it */ lck_rw_lock_exclusive(&in6_ifaddr_rwlock); TAILQ_FOREACH(ia, &in6_ifaddrhead, ia6_link) { if (ia->ia_ifa.ifa_ifp != ifp) { continue; } IFA_LOCK(&ia->ia_ifa); if ((ia->ia6_flags & IN6_IFF_CLAT46) != 0) { ifa_addref(&ia->ia_ifa); /* for us */ IFA_UNLOCK(&ia->ia_ifa); lck_rw_done(&in6_ifaddr_rwlock); in6_purgeaddr(&ia->ia_ifa); ifa_remref(&ia->ia_ifa); /* for us */ goto done; } IFA_UNLOCK(&ia->ia_ifa); } lck_rw_done(&in6_ifaddr_rwlock); done: return error; } /* * Generic INET6 control operations (ioctl's). * * ifp is NULL if not an interface-specific ioctl. * * Most of the routines called to handle the ioctls would end up being * tail-call optimized, which unfortunately causes this routine to * consume too much stack space; this is the reason for the "noinline" * attribute used on those routines. * * If called directly from within the networking stack (as opposed to via * pru_control), the socket parameter may be NULL. */ int in6_control(struct socket *so, u_long cmd, caddr_t __sized_by(IOCPARM_LEN(cmd)) data, struct ifnet *ifp, struct proc *p) { struct in6_ifreq *__single ifr = NULL; struct in6_aliasreq sifra; struct in6_aliasreq *__single ifra = NULL; struct in6_ifaddr *__single ia = NULL; struct sockaddr_in6 sin6, *__single sa6 = NULL; boolean_t privileged = (proc_suser(p) == 0); boolean_t p64 = proc_is64bit(p); boolean_t so_unlocked = FALSE; int intval, error = 0; /* In case it's NULL, make sure it came from the kernel */ VERIFY(so != NULL || p == kernproc); /* * ioctls which don't require ifp, may require socket. */ switch (cmd) { case SIOCAADDRCTL_POLICY: /* struct in6_addrpolicy */ case SIOCDADDRCTL_POLICY: /* struct in6_addrpolicy */ if (!privileged) { return EPERM; } return in6_src_ioctl(cmd, data); /* NOTREACHED */ case SIOCDRADD_IN6_32: /* struct in6_defrouter_32 */ case SIOCDRADD_IN6_64: /* struct in6_defrouter_64 */ case SIOCDRDEL_IN6_32: /* struct in6_defrouter_32 */ case SIOCDRDEL_IN6_64: /* struct in6_defrouter_64 */ if (!privileged) { return EPERM; } return defrtrlist_ioctl(cmd, data); /* NOTREACHED */ case SIOCGASSOCIDS32: /* struct so_aidreq32 */ case SIOCGASSOCIDS64: /* struct so_aidreq64 */ return in6ctl_associd(so, cmd, data); /* NOTREACHED */ case SIOCGCONNIDS32: /* struct so_cidreq32 */ case SIOCGCONNIDS64: /* struct so_cidreq64 */ return in6ctl_connid(so, cmd, data); /* NOTREACHED */ case SIOCGCONNINFO32: /* struct so_cinforeq32 */ case SIOCGCONNINFO64: /* struct so_cinforeq64 */ return in6ctl_conninfo(so, cmd, data); /* NOTREACHED */ } /* * The rest of ioctls require ifp; reject if we don't have one; * return ENXIO to be consistent with ifioctl(). */ if (ifp == NULL) { return ENXIO; } /* * Unlock the socket since ifnet_ioctl() may be invoked by * one of the ioctl handlers below. Socket will be re-locked * prior to returning. */ if (so != NULL) { socket_unlock(so, 0); so_unlocked = TRUE; } lck_mtx_lock(&ifp->if_inet6_ioctl_lock); while (ifp->if_inet6_ioctl_busy) { (void) msleep(&ifp->if_inet6_ioctl_busy, &ifp->if_inet6_ioctl_lock, (PZERO - 1), __func__, NULL); LCK_MTX_ASSERT(&ifp->if_inet6_ioctl_lock, LCK_MTX_ASSERT_OWNED); } ifp->if_inet6_ioctl_busy = TRUE; lck_mtx_unlock(&ifp->if_inet6_ioctl_lock); /* * ioctls which require ifp but not interface address. */ switch (cmd) { case SIOCAUTOCONF_START: /* struct in6_ifreq */ if (!privileged) { error = EPERM; goto done; } error = in6_autoconf(ifp, TRUE); goto done; case SIOCAUTOCONF_STOP: /* struct in6_ifreq */ if (!privileged) { error = EPERM; goto done; } error = in6_autoconf(ifp, FALSE); goto done; case SIOCLL_START_32: /* struct in6_aliasreq_32 */ case SIOCLL_START_64: /* struct in6_aliasreq_64 */ if (!privileged) { error = EPERM; goto done; } error = in6ctl_llstart(ifp, cmd, data); goto done; case SIOCLL_STOP: /* struct in6_ifreq */ if (!privileged) { error = EPERM; goto done; } error = in6ctl_llstop(ifp); goto done; case SIOCCLAT46_START: /* struct in6_ifreq */ if (!privileged) { error = EPERM; goto done; } error = in6ctl_clat46start(ifp); if (error == 0) { if_set_eflags(ifp, IFEF_CLAT46); } goto done; case SIOCCLAT46_STOP: /* struct in6_ifreq */ if (!privileged) { error = EPERM; goto done; } error = in6ctl_clat46stop(ifp); goto done; case SIOCGETROUTERMODE_IN6: /* struct in6_ifreq */ intval = ifp->if_ipv6_router_mode; bcopy(&intval, &((struct in6_ifreq *)(void *)data)->ifr_intval, sizeof(intval)); goto done; case SIOCSETROUTERMODE_IN6: /* struct in6_ifreq */ if (!privileged) { error = EPERM; goto done; } bcopy(&((struct in6_ifreq *)(void *)data)->ifr_intval, &intval, sizeof(intval)); switch (intval) { case IPV6_ROUTER_MODE_DISABLED: case IPV6_ROUTER_MODE_EXCLUSIVE: case IPV6_ROUTER_MODE_HYBRID: break; default: error = EINVAL; goto done; } error = in6_setrouter(ifp, (ipv6_router_mode_t)intval); goto done; case SIOCPROTOATTACH_IN6_32: /* struct in6_aliasreq_32 */ case SIOCPROTOATTACH_IN6_64: /* struct in6_aliasreq_64 */ if (!privileged) { error = EPERM; goto done; } error = in6_domifattach(ifp); goto done; case SIOCPROTODETACH_IN6: /* struct in6_ifreq */ if (!privileged) { error = EPERM; goto done; } /* Cleanup interface routes and addresses */ in6_purgeif(ifp); if ((error = proto_unplumb(PF_INET6, ifp))) { log(LOG_ERR, "SIOCPROTODETACH_IN6: %s error=%d\n", if_name(ifp), error); } goto done; case SIOCSNDFLUSH_IN6: /* struct in6_ifreq */ case SIOCSPFXFLUSH_IN6: /* struct in6_ifreq */ case SIOCSRTRFLUSH_IN6: /* struct in6_ifreq */ case SIOCSDEFIFACE_IN6_32: /* struct in6_ndifreq_32 */ case SIOCSDEFIFACE_IN6_64: /* struct in6_ndifreq_64 */ case SIOCSIFINFO_FLAGS: /* struct in6_ndireq */ case SIOCGIFCGAPREP_IN6_32: /* struct in6_cgareq_32 */ case SIOCGIFCGAPREP_IN6_64: /* struct in6_cgareq_64 */ case SIOCSIFCGAPREP_IN6_32: /* struct in6_cgareq_32 */ case SIOCSIFCGAPREP_IN6_64: /* struct in6_cgareq_32 */ if (!privileged) { error = EPERM; goto done; } OS_FALLTHROUGH; case OSIOCGIFINFO_IN6: /* struct in6_ondireq */ case SIOCGIFINFO_IN6: /* struct in6_ondireq */ case SIOCGNBRINFO_IN6_32: /* struct in6_nbrinfo_32 */ case SIOCGNBRINFO_IN6_64: /* struct in6_nbrinfo_64 */ case SIOCGDEFIFACE_IN6_32: /* struct in6_ndifreq_32 */ case SIOCGDEFIFACE_IN6_64: /* struct in6_ndifreq_64 */ error = nd6_ioctl(cmd, data, ifp); goto done; case SIOCSIFPREFIX_IN6: /* struct in6_prefixreq (deprecated) */ case SIOCDIFPREFIX_IN6: /* struct in6_prefixreq (deprecated) */ case SIOCAIFPREFIX_IN6: /* struct in6_rrenumreq (deprecated) */ case SIOCCIFPREFIX_IN6: /* struct in6_rrenumreq (deprecated) */ case SIOCSGIFPREFIX_IN6: /* struct in6_rrenumreq (deprecated) */ case SIOCGIFPREFIX_IN6: /* struct in6_prefixreq (deprecated) */ log(LOG_NOTICE, "prefix ioctls are now invalidated. " "please use ifconfig.\n"); error = EOPNOTSUPP; goto done; case SIOCSSCOPE6: /* struct in6_ifreq (deprecated) */ case SIOCGSCOPE6: /* struct in6_ifreq (deprecated) */ case SIOCGSCOPE6DEF: /* struct in6_ifreq (deprecated) */ error = EOPNOTSUPP; goto done; case SIOCLL_CGASTART_32: /* struct in6_cgareq_32 */ case SIOCLL_CGASTART_64: /* struct in6_cgareq_64 */ if (!privileged) { error = EPERM; } else { error = in6ctl_cgastart(ifp, cmd, data); } goto done; case SIOCGIFSTAT_IN6: /* struct in6_ifreq */ case SIOCGIFSTAT_ICMP6: /* struct in6_ifreq */ ifr = (struct in6_ifreq *)(void *)data; error = in6ctl_gifstat(ifp, cmd, ifr); goto done; } /* * ioctls which require interface address; obtain sockaddr_in6. */ switch (cmd) { case SIOCSIFADDR_IN6: /* struct in6_ifreq (deprecated) */ case SIOCSIFDSTADDR_IN6: /* struct in6_ifreq (deprecated) */ case SIOCSIFNETMASK_IN6: /* struct in6_ifreq (deprecated) */ /* * Since IPv6 allows a node to assign multiple addresses * on a single interface, SIOCSIFxxx ioctls are deprecated. */ /* we decided to obsolete this command (20000704) */ error = EOPNOTSUPP; goto done; case SIOCAIFADDR_IN6_32: /* struct in6_aliasreq_32 */ case SIOCAIFADDR_IN6_64: /* struct in6_aliasreq_64 */ if (!privileged) { error = EPERM; goto done; } /* * Convert user ifra to the kernel form, when appropriate. * This allows the conversion between different data models * to be centralized, so that it can be passed around to other * routines that are expecting the kernel form. */ ifra = in6_aliasreq_to_native(data, (cmd == SIOCAIFADDR_IN6_64), &sifra); SOCKADDR_COPY(&ifra->ifra_addr, &sin6, sizeof(sin6)); sa6 = &sin6; break; case SIOCDIFADDR_IN6: /* struct in6_ifreq */ case SIOCSIFALIFETIME_IN6: /* struct in6_ifreq */ if (!privileged) { error = EPERM; goto done; } OS_FALLTHROUGH; case SIOCGIFADDR_IN6: /* struct in6_ifreq */ case SIOCGIFDSTADDR_IN6: /* struct in6_ifreq */ case SIOCGIFNETMASK_IN6: /* struct in6_ifreq */ case SIOCGIFAFLAG_IN6: /* struct in6_ifreq */ case SIOCGIFALIFETIME_IN6: /* struct in6_ifreq */ ifr = (struct in6_ifreq *)(void *)data; SOCKADDR_COPY(&ifr->ifr_addr, &sin6, sizeof(sin6)); sa6 = &sin6; break; case SIOCGIFDSTADDR: case SIOCSIFDSTADDR: case SIOCGIFBRDADDR: case SIOCSIFBRDADDR: case SIOCGIFNETMASK: case SIOCSIFNETMASK: case SIOCGIFADDR: case SIOCSIFADDR: case SIOCAIFADDR: case SIOCDIFADDR: /* Do not handle these AF_INET commands in AF_INET6 path */ error = EINVAL; goto done; } /* * Find address for this interface, if it exists. * * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation * only, and used the first interface address as the target of other * operations (without checking ifra_addr). This was because netinet * code/API assumed at most 1 interface address per interface. * Since IPv6 allows a node to assign multiple addresses * on a single interface, we almost always look and check the * presence of ifra_addr, and reject invalid ones here. * It also decreases duplicated code among SIOC*_IN6 operations. */ VERIFY(ia == NULL); if (sa6 != NULL && sa6->sin6_family == AF_INET6) { if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) { if (in6_embedded_scope) { if (sa6->sin6_addr.s6_addr16[1] == 0) { /* link ID is not embedded by the user */ sa6->sin6_addr.s6_addr16[1] = htons(ifp->if_index); } else if (sa6->sin6_addr.s6_addr16[1] != htons(ifp->if_index)) { error = EINVAL; /* link ID contradicts */ goto done; } if (sa6->sin6_scope_id) { if (sa6->sin6_scope_id != (u_int32_t)ifp->if_index) { error = EINVAL; goto done; } sa6->sin6_scope_id = 0; /* XXX: good way? */ } } else { if (sa6->sin6_scope_id == IFSCOPE_NONE) { sa6->sin6_scope_id = ifp->if_index; } else if (sa6->sin6_scope_id != ifp->if_index) { error = EINVAL; /* link ID contradicts */ goto done; } } } /* * Any failures from this point on must take into account * a non-NULL "ia" with an outstanding reference count, and * therefore requires ifa_remref. Jump to "done" label * instead of calling return if "ia" is valid. */ ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); } /* * SIOCDIFADDR_IN6/SIOCAIFADDR_IN6 specific tests. */ switch (cmd) { case SIOCDIFADDR_IN6: /* struct in6_ifreq */ if (ia == NULL) { error = EADDRNOTAVAIL; goto done; } OS_FALLTHROUGH; case SIOCAIFADDR_IN6_32: /* struct in6_aliasreq_32 */ case SIOCAIFADDR_IN6_64: /* struct in6_aliasreq_64 */ VERIFY(sa6 != NULL); /* * We always require users to specify a valid IPv6 address for * the corresponding operation. Use "sa6" instead of "ifra" * since SIOCDIFADDR_IN6 falls thru above. */ if (sa6->sin6_family != AF_INET6 || sa6->sin6_len != sizeof(struct sockaddr_in6)) { error = EAFNOSUPPORT; goto done; } if ((cmd == SIOCAIFADDR_IN6_32 || cmd == SIOCAIFADDR_IN6_64) && (IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr) || IN6_IS_ADDR_MULTICAST(&sa6->sin6_addr) || IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr) || IN6_IS_ADDR_V4COMPAT(&sa6->sin6_addr))) { error = EINVAL; goto done; } break; } /* * And finally process address-related ioctls. */ switch (cmd) { case SIOCGIFADDR_IN6: /* struct in6_ifreq */ /* This interface is basically deprecated. use SIOCGIFCONF. */ /* FALLTHRU */ case SIOCGIFDSTADDR_IN6: /* struct in6_ifreq */ ifr = (struct in6_ifreq *)(void *)data; error = in6ctl_gifaddr(ifp, ia, cmd, ifr); break; case SIOCGIFNETMASK_IN6: /* struct in6_ifreq */ if (ia != NULL) { ifr = (struct in6_ifreq *)(void *)data; IFA_LOCK(&ia->ia_ifa); SOCKADDR_COPY(&ia->ia_prefixmask, &ifr->ifr_addr, sizeof(struct sockaddr_in6)); IFA_UNLOCK(&ia->ia_ifa); } else { error = EADDRNOTAVAIL; } break; case SIOCGIFAFLAG_IN6: /* struct in6_ifreq */ if (ia != NULL) { ifr = (struct in6_ifreq *)(void *)data; IFA_LOCK(&ia->ia_ifa); bcopy(&ia->ia6_flags, &ifr->ifr_ifru.ifru_flags6, sizeof(ifr->ifr_ifru.ifru_flags6)); IFA_UNLOCK(&ia->ia_ifa); } else { error = EADDRNOTAVAIL; } break; case SIOCGIFALIFETIME_IN6: /* struct in6_ifreq */ case SIOCSIFALIFETIME_IN6: /* struct in6_ifreq */ ifr = (struct in6_ifreq *)(void *)data; error = in6ctl_alifetime(ia, cmd, ifr, p64); break; case SIOCAIFADDR_IN6_32: /* struct in6_aliasreq_32 */ case SIOCAIFADDR_IN6_64: /* struct in6_aliasreq_64 */ ifr = (struct in6_ifreq *)(void *)data; error = in6ctl_aifaddr(ifp, ifra); break; case SIOCDIFADDR_IN6: in6ctl_difaddr(ifp, ia); break; default: error = ifnet_ioctl(ifp, PF_INET6, cmd, data); break; } done: if (ifp != NULL) { lck_mtx_lock(&ifp->if_inet6_ioctl_lock); ifp->if_inet6_ioctl_busy = FALSE; lck_mtx_unlock(&ifp->if_inet6_ioctl_lock); wakeup(&ifp->if_inet6_ioctl_busy); } if (ia != NULL) { ifa_remref(&ia->ia_ifa); } if (so_unlocked) { socket_lock(so, 0); } return error; } static __attribute__((noinline)) int in6ctl_aifaddr(struct ifnet *ifp, struct in6_aliasreq *ifra) { int i, error, addtmp; uint8_t plen; struct nd_prefix pr0; struct nd_prefix *__single pr; struct in6_ifaddr *__single ia; VERIFY(ifp != NULL && ifra != NULL); ia = NULL; /* * XXX This interface is not meant to be used for static LLA * configuration. * Instead one can use SIOCLL_START can be used to configure LLA * statically. * For bin-compat reasons though, allow it for now and only make * sure that scope gets communicated correctly. */ if (IN6_IS_ADDR_LINKLOCAL(&ifra->ifra_addr.sin6_addr)) { if (in6_embedded_scope) { ifra->ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); } else { /* * XXX May be we should rather also check if sin6_scope_id * is already set or enforce if set that it is same * as interface index? * For now to avoid any unintended consequence, just use * interface index and set sin6_scope_id. * Also should we just prohibit this interface to configure * additional link local and limti LLA configuration through * other *_start ioctls? */ ifra->ifra_addr.sin6_addr.s6_addr16[1] = 0; ifra->ifra_addr.sin6_scope_id = ifp->if_index; } } /* Attempt to attach the protocol, in case it isn't attached */ error = in6_domifattach(ifp); if (error == 0) { /* PF_INET6 wasn't previously attached */ error = in6_ifattach_aliasreq(ifp, NULL, NULL); if (error != 0) { goto done; } in6_if_up_dad_start(ifp); } else if (error != EEXIST) { goto done; } /* * First, make or update the interface address structure, and link it * to the list. */ error = in6_update_ifa(ifp, ifra, 0, &ia); if (error != 0) { goto done; } VERIFY(ia != NULL); /* Now, make the prefix on-link on the interface. */ plen = (uint8_t)in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, NULL); if (plen == 128) { goto done; } /* * NOTE: We'd rather create the prefix before the address, but we need * at least one address to install the corresponding interface route, * so we configure the address first. */ /* * Convert mask to prefix length (prefixmask has already been validated * in in6_update_ifa(). */ bzero(&pr0, sizeof(pr0)); pr0.ndpr_plen = plen; pr0.ndpr_ifp = ifp; pr0.ndpr_prefix = ifra->ifra_addr; pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr; /* apply the mask for safety. */ for (i = 0; i < 4; i++) { pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; } /* * Since we don't have an API to set prefix (not address) lifetimes, we * just use the same lifetimes as addresses. The (temporarily) * installed lifetimes can be overridden by later advertised RAs (when * accept_rtadv is non 0), which is an intended behavior. */ pr0.ndpr_raf_onlink = 1; /* should be configurable? */ pr0.ndpr_raf_auto = !!(ifra->ifra_flags & IN6_IFF_AUTOCONF); if (ifra->ifra_flags & (IN6_IFF_AUTOCONF | IN6_IFF_DYNAMIC)) { pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; } else { pr0.ndpr_vltime = ND6_INFINITE_LIFETIME; pr0.ndpr_pltime = ND6_INFINITE_LIFETIME; } pr0.ndpr_stateflags |= NDPRF_STATIC; lck_mtx_init(&pr0.ndpr_lock, &ifa_mtx_grp, &ifa_mtx_attr); /* add the prefix if there's none. */ if ((pr = nd6_prefix_lookup(&pr0, ND6_PREFIX_EXPIRY_NEVER)) == NULL) { /* * nd6_prelist_add will install the corresponding interface * route. */ error = nd6_prelist_add(&pr0, NULL, &pr, FALSE); if (error != 0) { goto done; } if (pr == NULL) { log(LOG_ERR, "%s: nd6_prelist_add okay, but" " no prefix.\n", __func__); error = EINVAL; goto done; } } IFA_LOCK(&ia->ia_ifa); /* if this is a new autoconfed addr */ addtmp = FALSE; if (ia->ia6_ndpr == NULL) { NDPR_LOCK(pr); ++pr->ndpr_addrcnt; if (!(ia->ia6_flags & IN6_IFF_NOTMANUAL)) { ++pr->ndpr_manual_addrcnt; VERIFY(pr->ndpr_manual_addrcnt != 0); } VERIFY(pr->ndpr_addrcnt != 0); ia->ia6_ndpr = pr; NDPR_ADDREF(pr); /* for addr reference */ /* * If this is the first autoconf address from the prefix, * create a temporary address as well (when specified). */ if ((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 && ip6_use_tempaddr && pr->ndpr_addrcnt == 1 && (!IN6_IS_ADDR_UNIQUE_LOCAL(&ia->ia_addr.sin6_addr) || ip6_ula_use_tempaddr)) { addtmp = true; } NDPR_UNLOCK(pr); } IFA_UNLOCK(&ia->ia_ifa); if (addtmp) { int e; e = in6_tmpifadd(ia, 1); if (e != 0) { log(LOG_NOTICE, "%s: failed to create a" " temporary address, error=%d\n", __func__, e); } } /* * This might affect the status of autoconfigured addresses, that is, * this address might make other addresses detached. */ lck_mtx_lock(nd6_mutex); pfxlist_onlink_check(false); lck_mtx_unlock(nd6_mutex); /* Drop use count held above during lookup/add */ NDPR_REMREF(pr); done: if (ia != NULL) { ifa_remref(&ia->ia_ifa); } return error; } static __attribute__((noinline)) void in6ctl_difaddr(struct ifnet *ifp, struct in6_ifaddr *ia) { int i = 0; struct nd_prefix pr0; struct nd_prefix *__single pr; VERIFY(ifp != NULL && ia != NULL); /* * If the address being deleted is the only one that owns * the corresponding prefix, expire the prefix as well. * XXX: theoretically, we don't have to worry about such * relationship, since we separate the address management * and the prefix management. We do this, however, to provide * as much backward compatibility as possible in terms of * the ioctl operation. * Note that in6_purgeaddr() will decrement ndpr_addrcnt. */ IFA_LOCK(&ia->ia_ifa); bzero(&pr0, sizeof(pr0)); pr0.ndpr_ifp = ifp; pr0.ndpr_plen = (uint8_t)in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); if (pr0.ndpr_plen == 128) { IFA_UNLOCK(&ia->ia_ifa); goto purgeaddr; } pr0.ndpr_prefix = ia->ia_addr; pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr; for (i = 0; i < 4; i++) { pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= ia->ia_prefixmask.sin6_addr.s6_addr32[i]; } IFA_UNLOCK(&ia->ia_ifa); if ((pr = nd6_prefix_lookup(&pr0, ND6_PREFIX_EXPIRY_UNSPEC)) != NULL) { IFA_LOCK(&ia->ia_ifa); NDPR_LOCK(pr); if (pr->ndpr_addrcnt == 1) { /* XXX: just for expiration */ pr->ndpr_expire = 1; } NDPR_UNLOCK(pr); IFA_UNLOCK(&ia->ia_ifa); /* Drop use count held above during lookup */ NDPR_REMREF(pr); } purgeaddr: in6_purgeaddr(&ia->ia_ifa); } static __attribute__((noinline)) int in6_autoconf(struct ifnet *ifp, int enable) { int error = 0; VERIFY(ifp != NULL); if (ifp->if_flags & IFF_LOOPBACK) { return EINVAL; } if (enable) { /* * An interface in IPv6 router mode implies that it * is either configured with a static IP address or * autoconfigured via a locally-generated RA. Prevent * SIOCAUTOCONF_START from being set in that mode. */ ifnet_lock_exclusive(ifp); if (ifp->if_ipv6_router_mode == IPV6_ROUTER_MODE_EXCLUSIVE) { if_clear_eflags(ifp, IFEF_ACCEPT_RTADV); error = EBUSY; } else { if_set_eflags(ifp, IFEF_ACCEPT_RTADV); } ifnet_lock_done(ifp); } else { struct in6_ifaddr *__single ia = NULL; if_clear_eflags(ifp, IFEF_ACCEPT_RTADV); /* Remove autoconfigured address from interface */ lck_rw_lock_exclusive(&in6_ifaddr_rwlock); boolean_t from_begining = TRUE; while (from_begining) { from_begining = FALSE; TAILQ_FOREACH(ia, &in6_ifaddrhead, ia6_link) { if (ia->ia_ifa.ifa_ifp != ifp) { continue; } IFA_LOCK(&ia->ia_ifa); if (ia->ia6_flags & IN6_IFF_AUTOCONF) { ifa_addref(&ia->ia_ifa); /* for us */ IFA_UNLOCK(&ia->ia_ifa); lck_rw_done(&in6_ifaddr_rwlock); in6_purgeaddr(&ia->ia_ifa); ifa_remref(&ia->ia_ifa); /* for us */ lck_rw_lock_exclusive(&in6_ifaddr_rwlock); /* * Purging the address caused in6_ifaddr_rwlock * to be dropped and reacquired; * therefore search again from the beginning * of in6_ifaddrs list. */ from_begining = TRUE; break; } IFA_UNLOCK(&ia->ia_ifa); } } lck_rw_done(&in6_ifaddr_rwlock); } return error; } /* * Handle SIOCSETROUTERMODE_IN6 to set the IPv6 router mode on the interface * Entering or exiting IPV6_ROUTER_MODE_EXCLUSIVE will result in the removal of * autoconfigured IPv6 addresses on the interface. */ static __attribute__((noinline)) int in6_setrouter(struct ifnet *ifp, ipv6_router_mode_t mode) { int error = 0; ipv6_router_mode_t prev_mode; VERIFY(ifp != NULL); if (ifp->if_flags & IFF_LOOPBACK) { return ENODEV; } prev_mode = ifp->if_ipv6_router_mode; if (prev_mode == mode) { /* no mode change, there's nothing to do */ return 0; } if (mode == IPV6_ROUTER_MODE_EXCLUSIVE) { struct nd_ifinfo *__single ndi = NULL; ndi = ND_IFINFO(ifp); if (ndi != NULL && ndi->initialized) { lck_mtx_lock(&ndi->lock); if (ndi->flags & ND6_IFF_PROXY_PREFIXES) { /* No proxy if we are an advertising router */ ndi->flags &= ~ND6_IFF_PROXY_PREFIXES; lck_mtx_unlock(&ndi->lock); (void) nd6_if_prproxy(ifp, FALSE); } else { lck_mtx_unlock(&ndi->lock); } } } ifp->if_ipv6_router_mode = mode; lck_mtx_lock(nd6_mutex); defrouter_select(ifp, NULL); lck_mtx_unlock(nd6_mutex); if_allmulti(ifp, (mode == IPV6_ROUTER_MODE_EXCLUSIVE)); if (mode == IPV6_ROUTER_MODE_EXCLUSIVE || (prev_mode == IPV6_ROUTER_MODE_EXCLUSIVE && mode == IPV6_ROUTER_MODE_DISABLED)) { error = in6_autoconf(ifp, FALSE); } return error; } static int in6_to_kamescope(struct sockaddr_in6 *sin6, struct ifnet *ifp) { struct sockaddr_in6 tmp; int error, id; VERIFY(sin6 != NULL); tmp = *sin6; error = in6_recoverscope(&tmp, &sin6->sin6_addr, ifp); if (error != 0) { return error; } id = in6_addr2scopeid(ifp, &tmp.sin6_addr); if (tmp.sin6_scope_id == 0) { tmp.sin6_scope_id = id; } else if (tmp.sin6_scope_id != id) { return EINVAL; /* scope ID mismatch. */ } error = in6_embedscope(&tmp.sin6_addr, &tmp, NULL, NULL, NULL, IN6_NULL_IF_EMBEDDED_SCOPE(&tmp.sin6_scope_id)); if (error != 0) { return error; } if (in6_embedded_scope || !IN6_IS_SCOPE_EMBED(&tmp.sin6_addr)) { tmp.sin6_scope_id = 0; } *sin6 = tmp; return 0; } /* * When the address is being configured we should clear out certain flags * coming in from the caller. */ #define IN6_IFF_CLR_ADDR_FLAG_MASK (~(IN6_IFF_DEPRECATED | IN6_IFF_DETACHED | IN6_IFF_DUPLICATED)) static int in6_ifaupdate_aux(struct in6_ifaddr *ia, struct ifnet *ifp, int ifaupflags) { struct sockaddr_in6 mltaddr, mltmask; struct in6_addr llsol; struct ifaddr *__single ifa; struct in6_multi *__single in6m_sol; struct in6_multi_mship *__single imm; rtentry_ref_t rt; int delay, error = 0; VERIFY(ifp != NULL && ia != NULL); ifa = &ia->ia_ifa; in6m_sol = NULL; nd6log2(debug, "%s - %s ifp %s ia6_flags 0x%x ifaupflags 0x%x\n", __func__, ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ia->ia_ifp), ia->ia6_flags, ifaupflags); /* * Just to be safe, always clear certain flags when address * is being configured */ ia->ia6_flags &= IN6_IFF_CLR_ADDR_FLAG_MASK; /* * Mark the address as tentative before joining multicast addresses, * so that corresponding MLD responses would not have a tentative * source address. */ if (in6if_do_dad(ifp)) { in6_ifaddr_set_dadprogress(ia); /* * Do not delay sending neighbor solicitations when using optimistic * duplicate address detection, c.f. RFC 4429. */ if (ia->ia6_flags & IN6_IFF_OPTIMISTIC) { ifaupflags &= ~IN6_IFAUPDATE_DADDELAY; } else { ifaupflags |= IN6_IFAUPDATE_DADDELAY; } } else { /* * If the interface has been marked to not perform * DAD, make sure to reset DAD in progress flags * that may come in from the caller. */ ia->ia6_flags &= ~IN6_IFF_DADPROGRESS; } /* Join necessary multicast groups */ if ((ifp->if_flags & IFF_MULTICAST) != 0) { /* join solicited multicast addr for new host id */ bzero(&llsol, sizeof(struct in6_addr)); llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; llsol.s6_addr32[1] = 0; llsol.s6_addr32[2] = htonl(1); llsol.s6_addr32[3] = ia->ia_addr.sin6_addr.s6_addr32[3]; llsol.s6_addr8[12] = 0xff; if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { /* XXX: should not happen */ log(LOG_ERR, "%s: in6_setscope failed\n", __func__); goto unwind; } delay = 0; if ((ifaupflags & IN6_IFAUPDATE_DADDELAY)) { /* * We need a random delay for DAD on the address * being configured. It also means delaying * transmission of the corresponding MLD report to * avoid report collision. [RFC 4862] */ delay = random() % MAX_RTR_SOLICITATION_DELAY; } imm = in6_joingroup(ifp, &llsol, &error, delay); if (imm == NULL) { nd6log(info, "%s: addmulti failed for %s on %s (errno=%d)\n", __func__, ip6_sprintf(&llsol), if_name(ifp), error); VERIFY(error != 0); goto unwind; } in6m_sol = imm->i6mm_maddr; /* take a refcount for this routine */ IN6M_ADDREF(in6m_sol); IFA_LOCK_SPIN(ifa); LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); IFA_UNLOCK(ifa); SOCKADDR_ZERO(&mltmask, sizeof(mltmask)); mltmask.sin6_len = sizeof(struct sockaddr_in6); mltmask.sin6_family = AF_INET6; mltmask.sin6_addr = in6mask32; #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ /* * join link-local all-nodes address */ SOCKADDR_ZERO(&mltaddr, sizeof(mltaddr)); mltaddr.sin6_len = sizeof(struct sockaddr_in6); mltaddr.sin6_family = AF_INET6; mltaddr.sin6_addr = in6addr_linklocal_allnodes; if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, IN6_NULL_IF_EMBEDDED_SCOPE(&mltaddr.sin6_scope_id))) != 0) { goto unwind; /* XXX: should not fail */ } /* * XXX: do we really need this automatic routes? * We should probably reconsider this stuff. Most applications * actually do not need the routes, since they usually specify * the outgoing interface. */ rt = rtalloc1_scoped(SA(&mltaddr), 0, 0UL, ia->ia_ifp->if_index); if (rt) { if (memcmp(&mltaddr.sin6_addr, &SIN6(rt_key(rt))->sin6_addr, MLTMASK_LEN)) { rtfree(rt); rt = NULL; } } if (!rt) { error = rtrequest_scoped(RTM_ADD, SA(&mltaddr), SA(&ia->ia_addr), SA(&mltmask), RTF_UP | RTF_CLONING, NULL, ia->ia_ifp->if_index); if (error) { goto unwind; } } else { rtfree(rt); } imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); if (!imm) { nd6log(info, "%s: addmulti failed for %s on %s (errno=%d)\n", __func__, ip6_sprintf(&mltaddr.sin6_addr), if_name(ifp), error); VERIFY(error != 0); goto unwind; } IFA_LOCK_SPIN(ifa); LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); IFA_UNLOCK(ifa); /* * join node information group address */ delay = 0; if ((ifaupflags & IN6_IFAUPDATE_DADDELAY)) { /* * The spec doesn't say anything about delay for this * group, but the same logic should apply. */ delay = random() % MAX_RTR_SOLICITATION_DELAY; } lck_mtx_lock(&hostname_lock); int n = in6_nigroup(ifp, hostname, strbuflen(hostname), &mltaddr.sin6_addr, IN6_NULL_IF_EMBEDDED_SCOPE(&mltaddr.sin6_scope_id)); lck_mtx_unlock(&hostname_lock); if (n == 0) { imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay); /* XXX jinmei */ if (!imm) { nd6log(info, "%s: addmulti failed for %s on %s " "(errno=%d)\n", __func__, ip6_sprintf(&mltaddr.sin6_addr), if_name(ifp), error); /* XXX not very fatal, go on... */ error = 0; } else { IFA_LOCK_SPIN(ifa); LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); IFA_UNLOCK(ifa); } } /* * join interface-local all-nodes address. * (ff01::1%ifN, and ff01::%ifN/32) */ mltaddr.sin6_addr = in6addr_nodelocal_allnodes; if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, IN6_NULL_IF_EMBEDDED_SCOPE(&mltaddr.sin6_scope_id))) != 0) { goto unwind; /* XXX: should not fail */ } /* XXX: again, do we really need the route? */ rt = rtalloc1_scoped(SA(&mltaddr), 0, 0UL, ia->ia_ifp->if_index); if (rt) { if (memcmp(&mltaddr.sin6_addr, &(SIN6(rt_key(rt)))->sin6_addr, MLTMASK_LEN)) { rtfree(rt); rt = NULL; } } if (!rt) { error = rtrequest_scoped(RTM_ADD, SA(&mltaddr), SA(&ia->ia_addr), SA(&mltmask), RTF_UP | RTF_CLONING, NULL, ia->ia_ifp->if_index); if (error) { goto unwind; } } else { rtfree(rt); } imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); if (!imm) { nd6log(info, "%s: addmulti failed for %s on %s (errno=%d)\n", __func__, ip6_sprintf(&mltaddr.sin6_addr), if_name(ifp), error); VERIFY(error != 0); goto unwind; } IFA_LOCK(ifa); LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); IFA_UNLOCK(ifa); #undef MLTMASK_LEN /* * create a ff00::/8 route */ SOCKADDR_ZERO(&mltmask, sizeof(mltmask)); mltmask.sin6_len = sizeof(struct sockaddr_in6); mltmask.sin6_family = AF_INET6; mltmask.sin6_addr = in6mask8; #define MLTMASK_LEN_8_BITS 1 /* ff00::/8 mltmask's masklen (=8bit=1octet) */ SOCKADDR_ZERO(&mltaddr, sizeof(mltaddr)); mltaddr.sin6_len = sizeof(struct sockaddr_in6); mltaddr.sin6_family = AF_INET6; mltaddr.sin6_addr = in6addr_multicast_prefix; rt = rtalloc1_scoped(SA(&mltaddr), 0, 0UL, ia->ia_ifp->if_index); if (rt) { if (memcmp(&mltaddr.sin6_addr, &(SIN6(rt_key(rt)))->sin6_addr, MLTMASK_LEN_8_BITS)) { rtfree(rt); rt = NULL; } } if (!rt) { error = rtrequest_scoped(RTM_ADD, SA(&mltaddr), SA(&ia->ia_addr), SA(&mltmask), RTF_UP | RTF_CLONING, NULL, ia->ia_ifp->if_index); if (error) { goto unwind; } } else { rtfree(rt); } } #undef MLTMASK_LEN_8_BITS /* Ensure nd6_service() is scheduled as soon as it's convenient */ ++nd6_sched_timeout_want; /* * Perform DAD, if: * * Interface is marked to perform DAD, AND * * Address is not marked to skip DAD, AND * * Address is in a pre-DAD state (Tentative or Optimistic) */ IFA_LOCK_SPIN(ifa); if (in6if_do_dad(ifp) && (ia->ia6_flags & IN6_IFF_NODAD) == 0 && (ia->ia6_flags & IN6_IFF_DADPROGRESS) != 0) { int mindelay, maxdelay; int *delayptr, delayval; IFA_UNLOCK(ifa); delayptr = NULL; /* * Avoid the DAD delay if the caller wants us to skip it. * This is not compliant with RFC 2461, but it's only being * used for signalling and not for actual DAD. */ if ((ifaupflags & IN6_IFAUPDATE_DADDELAY) && !(ia->ia6_flags & IN6_IFF_SWIFTDAD)) { /* * We need to impose a delay before sending an NS * for DAD. Check if we also needed a delay for the * corresponding MLD message. If we did, the delay * should be larger than the MLD delay (this could be * relaxed a bit, but this simple logic is at least * safe). */ mindelay = 0; if (in6m_sol != NULL) { IN6M_LOCK(in6m_sol); if (in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { mindelay = in6m_sol->in6m_timer; } IN6M_UNLOCK(in6m_sol); } maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; if (maxdelay - mindelay == 0) { delayval = 0; } else { delayval = (random() % (maxdelay - mindelay)) + mindelay; } delayptr = &delayval; } nd6_dad_start((struct ifaddr *)ia, delayptr); } else { IFA_UNLOCK(ifa); } goto done; unwind: VERIFY(error != 0); in6_purgeaddr(&ia->ia_ifa); done: /* release reference held for this routine */ if (in6m_sol != NULL) { IN6M_REMREF(in6m_sol); } return error; } /* * Request an IPv6 interface address. If the address is new, then it will be * constructed and appended to the interface address chains. The interface * address structure is optionally returned with a reference for the caller. */ int in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int ifaupflags, struct in6_ifaddr **iar) { struct in6_addrlifetime ia6_lt; struct in6_ifaddr *__single ia; struct ifaddr *__single ifa; struct ifaddr *__single xifa; struct in6_addrlifetime *__single lt; uint64_t timenow; int plen, error; /* Sanity check parameters and initialize locals */ VERIFY(ifp != NULL && ifra != NULL && iar != NULL); ia = NULL; ifa = NULL; error = 0; /* * We always require users to specify a valid IPv6 address for * the corresponding operation. */ if (ifra->ifra_addr.sin6_family != AF_INET6 || ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { error = EAFNOSUPPORT; goto unwind; } /* Validate ifra_prefixmask.sin6_len is properly bounded. */ if (ifra->ifra_prefixmask.sin6_len == 0 || ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) { error = EINVAL; goto unwind; } /* Validate prefix length extracted from ifra_prefixmask structure. */ plen = (uint8_t)in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, (u_char *)&ifra->ifra_prefixmask + ifra->ifra_prefixmask.sin6_len); if (plen <= 0) { error = EINVAL; goto unwind; } /* Validate lifetimes */ lt = &ifra->ifra_lifetime; if (lt->ia6t_pltime > lt->ia6t_vltime) { log(LOG_INFO, "%s: pltime 0x%x > vltime 0x%x for %s\n", __func__, lt->ia6t_pltime, lt->ia6t_vltime, ip6_sprintf(&ifra->ifra_addr.sin6_addr)); error = EINVAL; goto unwind; } if (lt->ia6t_vltime == 0) { /* * the following log might be noisy, but this is a typical * configuration mistake or a tool's bug. */ log(LOG_INFO, "%s: valid lifetime is 0 for %s\n", __func__, ip6_sprintf(&ifra->ifra_addr.sin6_addr)); } /* * Before we lock the ifnet structure, we first check to see if the * address already exists. If so, then we don't allocate and link a * new one here. */ struct sockaddr_in6 lookup_address = ifra->ifra_addr; if (IN6_IS_ADDR_LINKLOCAL(&lookup_address.sin6_addr)) { if (in6_embedded_scope) { if (lookup_address.sin6_addr.s6_addr16[1] == 0) { /* link ID is not embedded by the user */ lookup_address.sin6_addr.s6_addr16[1] = htons(ifp->if_index); } else if (lookup_address.sin6_addr.s6_addr16[1] != htons(ifp->if_index)) { error = EINVAL; /* link ID contradicts */ goto done; } } else { if (lookup_address.sin6_scope_id == IFSCOPE_NONE) { lookup_address.sin6_scope_id = ifp->if_index; } } if (lookup_address.sin6_scope_id != 0 && lookup_address.sin6_scope_id != (u_int32_t)ifp->if_index) { error = EINVAL; goto done; } } ia = in6ifa_ifpwithaddr(ifp, &lookup_address.sin6_addr); if (ia != NULL) { ifa = &ia->ia_ifa; } /* * Validate destination address on interface types that require it. */ if ((ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) { switch (ifra->ifra_dstaddr.sin6_family) { case AF_INET6: if (plen != 128) { /* noisy message for diagnostic purposes */ log(LOG_INFO, "%s: prefix length < 128 with" " explicit dstaddr.\n", __func__); error = EINVAL; goto unwind; } break; case AF_UNSPEC: break; default: error = EAFNOSUPPORT; goto unwind; } } else if (ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) { log(LOG_INFO, "%s: dstaddr valid only on p2p and loopback interfaces.\n", __func__); error = EINVAL; goto unwind; } timenow = net_uptime(); if (ia == NULL) { zalloc_flags_t how; /* Is this the first new IPv6 address for the interface? */ ifaupflags |= IN6_IFAUPDATE_NEWADDR; /* Allocate memory for IPv6 interface address structure. */ how = (ifaupflags & IN6_IFAUPDATE_NOWAIT) ? Z_NOWAIT : Z_WAITOK; ia = in6_ifaddr_alloc(how); if (ia == NULL) { error = ENOBUFS; goto unwind; } ifa = &ia->ia_ifa; /* * Initialize interface address structure. * * Note well: none of these sockaddr_in6 structures contain a * valid sin6_port, sin6_flowinfo or even a sin6_scope_id field. * We still embed link-local scope identifiers at the end of an * arbitrary fe80::/32 prefix, for historical reasons. Also, the * ifa_dstaddr field is always non-NULL on point-to-point and * loopback interfaces, and conventionally points to a socket * address of AF_UNSPEC family when there is no destination. * * Please enjoy the dancing sea turtle. */ IA6_HASH_INIT(ia); ifa->ifa_addr = SA(&ia->ia_addr); if (ifra->ifra_dstaddr.sin6_family == AF_INET6 || (ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { ifa->ifa_dstaddr = SA(&ia->ia_dstaddr); } ifa->ifa_netmask = SA(&ia->ia_prefixmask); ifa->ifa_ifp = ifp; ifa->ifa_metric = ifp->if_metric; ifa->ifa_rtrequest = nd6_rtrequest; LIST_INIT(&ia->ia6_memberships); ia->ia_addr.sin6_family = AF_INET6; ia->ia_addr.sin6_len = sizeof(ia->ia_addr); ia->ia_addr.sin6_addr = ifra->ifra_addr.sin6_addr; ia->ia_prefixmask.sin6_family = AF_INET6; ia->ia_prefixmask.sin6_len = sizeof(ia->ia_prefixmask); ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; error = in6_to_kamescope(&ia->ia_addr, ifp); if (error != 0) { goto unwind; } if (ifa->ifa_dstaddr != NULL) { ia->ia_dstaddr = ifra->ifra_dstaddr; error = in6_to_kamescope(&ia->ia_dstaddr, ifp); if (error != 0) { goto unwind; } } /* Append to address chains */ ifnet_lock_exclusive(ifp); ifaupflags |= IN6_IFAUPDATE_1STADDR; TAILQ_FOREACH(xifa, &ifp->if_addrlist, ifa_list) { IFA_LOCK_SPIN(xifa); if (xifa->ifa_addr->sa_family != AF_INET6) { IFA_UNLOCK(xifa); ifaupflags &= ~IN6_IFAUPDATE_1STADDR; break; } IFA_UNLOCK(xifa); } IFA_LOCK_SPIN(ifa); if_attach_ifa(ifp, ifa); /* holds reference for ifnet link */ IFA_UNLOCK(ifa); ifnet_lock_done(ifp); lck_rw_lock_exclusive(&in6_ifaddr_rwlock); TAILQ_INSERT_TAIL(&in6_ifaddrhead, ia, ia6_link); ifa_addref(ifa); /* hold for in6_ifaddrs link */ os_atomic_inc(&in6_ifaddrlist_genid, relaxed); lck_rw_done(&in6_ifaddr_rwlock); } else { ifa = &ia->ia_ifa; ifaupflags &= ~(IN6_IFAUPDATE_NEWADDR | IN6_IFAUPDATE_1STADDR); } VERIFY(ia != NULL && ifa == &ia->ia_ifa); if (!(ifaupflags & IN6_IFAUPDATE_NEWADDR) && ia->ia6_ndpr != NULL) { /* If we're flopping between address configuration methods, adjust the counts. */ struct nd_prefix *pr = ia->ia6_ndpr; NDPR_LOCK(pr); if ((ia->ia6_flags & IN6_IFF_NOTMANUAL) && !(ifra->ifra_flags & IN6_IFF_NOTMANUAL)) { log(LOG_DEBUG, "address %s already exists in automatic form", ip6_sprintf(&ia->ia_addr.sin6_addr)); pr->ndpr_manual_addrcnt--; } else if (!(ia->ia6_flags & IN6_IFF_NOTMANUAL) && (ifra->ifra_flags & IN6_IFF_NOTMANUAL)) { log(LOG_DEBUG, "address %s already exists in manual form", ip6_sprintf(&ia->ia_addr.sin6_addr)); /* no need to adjust counts here as npdr_addrcnt is always adjusted no matter the interface type */ } NDPR_UNLOCK(pr); } IFA_LOCK(ifa); /* * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred * to see if the address is deprecated or invalidated, but initialize * these members for applications. */ ia->ia6_updatetime = ia->ia6_createtime = timenow; ia6_lt = *lt; if (ia6_lt.ia6t_vltime != ND6_INFINITE_LIFETIME) { ia6_lt.ia6t_expire = (time_t)(timenow + ia6_lt.ia6t_vltime); } else { ia6_lt.ia6t_expire = 0; } if (ia6_lt.ia6t_pltime != ND6_INFINITE_LIFETIME) { ia6_lt.ia6t_preferred = (time_t)(timenow + ia6_lt.ia6t_pltime); } else { ia6_lt.ia6t_preferred = 0; } in6ifa_setlifetime(ia, &ia6_lt); /* * Backward compatibility - if IN6_IFF_DEPRECATED is set from the * userland, make it deprecated. */ if ((ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) { ia->ia6_lifetime.ia6ti_pltime = 0; ia->ia6_lifetime.ia6ti_preferred = timenow; } /* * Update flag or prefix length */ ia->ia_plen = plen; ia->ia6_flags = ifra->ifra_flags; /* Release locks (new address available to concurrent tasks) */ IFA_UNLOCK(ifa); /* Further initialization of the interface address */ error = in6_ifinit(ifp, ia, ifaupflags); if (error != 0) { goto unwind; } /* Finish updating the address while other tasks are working with it */ error = in6_ifaupdate_aux(ia, ifp, ifaupflags); if (error != 0) { goto unwind; } /* Return success (optionally w/ address for caller). */ VERIFY(error == 0); (void) ifnet_notify_address(ifp, AF_INET6); goto done; unwind: VERIFY(error != 0); if (ia != NULL) { VERIFY(ifa == &ia->ia_ifa); ifa_remref(ifa); ia = NULL; } done: *iar = ia; return error; } void in6_purgeaddr(struct ifaddr *ifa) { struct ifnet *ifp = ifa->ifa_ifp; struct in6_ifaddr *ia = ifatoia6(ifa); struct in6_multi_mship *__single imm; LCK_MTX_ASSERT(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED); /* stop DAD processing */ nd6_dad_stop(ifa); /* * delete route to the destination of the address being purged. * The interface must be p2p or loopback in this case. */ IFA_LOCK(ifa); if ((ia->ia_flags & IFA_ROUTE) && ia->ia_plen == 128) { int error, rtf; IFA_UNLOCK(ifa); rtf = (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0; error = rtinit(&(ia->ia_ifa), RTM_DELETE, rtf); if (error != 0) { log(LOG_ERR, "in6_purgeaddr: failed to remove " "a route to the p2p destination: %s on %s, " "errno=%d\n", ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp), error); /* proceed anyway... */ } IFA_LOCK_SPIN(ifa); ia->ia_flags &= ~IFA_ROUTE; } IFA_UNLOCK(ifa); /* Remove ownaddr's loopback rtentry, if it exists. */ in6_ifremloop(&(ia->ia_ifa)); /* * leave from multicast groups we have joined for the interface */ IFA_LOCK(ifa); while ((imm = ia->ia6_memberships.lh_first) != NULL) { LIST_REMOVE(imm, i6mm_chain); IFA_UNLOCK(ifa); in6_leavegroup(imm); IFA_LOCK(ifa); } IFA_UNLOCK(ifa); /* in6_unlink_ifa() will need exclusive access */ in6_unlink_ifa(ia, ifp); in6_post_msg(ifp, KEV_INET6_ADDR_DELETED, ia, NULL, 0); (void) ifnet_notify_address(ifp, AF_INET6); } static void in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) { struct in6_ifaddr *__single nia; struct ifaddr *__single ifa; int unlinked; LCK_MTX_ASSERT(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED); ifa = &ia->ia_ifa; ifa_addref(ifa); ifnet_lock_exclusive(ifp); IFA_LOCK(ifa); if (ifa->ifa_debug & IFD_ATTACHED) { if_detach_ifa(ifp, ifa); } IFA_UNLOCK(ifa); ifnet_lock_done(ifp); unlinked = 0; lck_rw_lock_exclusive(&in6_ifaddr_rwlock); TAILQ_FOREACH(nia, &in6_ifaddrhead, ia6_link) { if (ia == nia) { TAILQ_REMOVE(&in6_ifaddrhead, ia, ia6_link); os_atomic_inc(&in6_ifaddrlist_genid, relaxed); IFA_LOCK(ifa); if (IA6_IS_HASHED(ia)) { in6_iahash_remove(ia); } IFA_UNLOCK(ifa); unlinked = 1; break; } } /* * When IPv6 address is being removed, release the * reference to the base prefix. * Also, since the release might, affect the status * of other (detached) addresses, call * pfxlist_onlink_check(). */ IFA_LOCK(ifa); /* * Only log the below message for addresses other than * link local. * Only one LLA (auto-configured or statically) is allowed * on an interface. * LLA prefix, while added to the prefix list, is not * reference counted (as it is the only one). * The prefix also never expires on its own as LLAs * have infinite lifetime. * * For now quiece down the log message for LLAs. */ if (!IN6_IS_ADDR_LINKLOCAL(&ia->ia_addr.sin6_addr)) { if (ia->ia6_ndpr == NULL) { log(LOG_NOTICE, "in6_unlink_ifa: IPv6 address " "0x%llx has no prefix\n", (uint64_t)VM_KERNEL_ADDRPERM(ia)); } else { struct nd_prefix *__single pr = ia->ia6_ndpr; NDPR_LOCK(pr); if (!(ia->ia6_flags & IN6_IFF_NOTMANUAL)) { VERIFY(pr->ndpr_manual_addrcnt != 0); pr->ndpr_manual_addrcnt--; } ia->ia6_flags &= ~IN6_IFF_AUTOCONF; ia->ia6_ndpr = NULL; VERIFY(pr->ndpr_addrcnt != 0); pr->ndpr_addrcnt--; if (ia->ia6_flags & IN6_IFF_CLAT46) { pr->ndpr_stateflags &= ~NDPRF_CLAT46; } NDPR_UNLOCK(pr); NDPR_REMREF(pr); /* release addr reference */ } } IFA_UNLOCK(ifa); lck_rw_done(&in6_ifaddr_rwlock); if ((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0) { lck_mtx_lock(nd6_mutex); pfxlist_onlink_check(false); lck_mtx_unlock(nd6_mutex); } /* * release another refcnt for the link from in6_ifaddrs. * Do this only if it's not already unlinked in the event that we lost * the race, since in6_ifaddr_rwlock was momentarily dropped above. */ if (unlinked) { ifa_remref(ifa); } /* release reference held for this routine */ ifa_remref(ifa); /* invalidate route caches */ routegenid_inet6_update(); } void in6_purgeif(struct ifnet *ifp) { struct in6_ifaddr *__single ia; if (ifp == NULL) { return; } LCK_MTX_ASSERT(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED); lck_rw_lock_exclusive(&in6_ifaddr_rwlock); boolean_t from_begining = TRUE; while (from_begining) { from_begining = FALSE; TAILQ_FOREACH(ia, &in6_ifaddrhead, ia6_link) { if (ia->ia_ifa.ifa_ifp != ifp) { continue; } ifa_addref(&ia->ia_ifa); /* for us */ lck_rw_done(&in6_ifaddr_rwlock); in6_purgeaddr(&ia->ia_ifa); ifa_remref(&ia->ia_ifa); /* for us */ lck_rw_lock_exclusive(&in6_ifaddr_rwlock); /* * Purging the address would have caused * in6_ifaddr_rwlock to be dropped and reacquired; * therefore search again from the beginning * of in6_ifaddrs list. */ from_begining = TRUE; break; } } lck_rw_done(&in6_ifaddr_rwlock); in6_ifdetach(ifp); } /* * Initialize an interface's internet6 address and routing table entry. */ static int in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, int ifaupflags) { int error; struct ifaddr *__single ifa; error = 0; ifa = &ia->ia_ifa; lck_rw_lock_exclusive(&in6_ifaddr_rwlock); IFA_LOCK(&ia->ia_ifa); if (IA6_IS_HASHED(ia)) { in6_iahash_remove(ia); } if ((ifp->if_flags & IFF_POINTOPOINT)) { in6_iahash_insert_ptp(ia); } else { in6_iahash_insert(ia); } IFA_UNLOCK(&ia->ia_ifa); lck_rw_done(&in6_ifaddr_rwlock); /* * NOTE: SIOCSIFADDR is defined with struct ifreq as parameter, * but here we are sending it down to the interface with a pointer * to struct ifaddr, for legacy reasons. */ if ((ifaupflags & IN6_IFAUPDATE_1STADDR) != 0) { error = ifnet_ioctl(ifp, PF_INET6, SIOCSIFADDR, ia); if (error != 0) { if (error != EOPNOTSUPP) { goto failed; } error = 0; } } IFA_LOCK(ifa); /* * Special case: * If the destination address is specified for a point-to-point * interface, install a route to the destination as an interface * direct route. */ if (!(ia->ia_flags & IFA_ROUTE) && ia->ia_plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) { IFA_UNLOCK(ifa); error = rtinit(ifa, RTM_ADD, RTF_UP | RTF_HOST); if (error != 0) { goto failed; } IFA_LOCK(ifa); ia->ia_flags |= IFA_ROUTE; } IFA_LOCK_ASSERT_HELD(ifa); if (ia->ia_plen < 128) { /* * The RTF_CLONING flag is necessary for in6_is_ifloop_auto(). */ ia->ia_flags |= RTF_CLONING; } IFA_UNLOCK(ifa); /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ if ((ifaupflags & IN6_IFAUPDATE_NEWADDR) != 0) { in6_ifaddloop(ifa); } /* invalidate route caches */ routegenid_inet6_update(); VERIFY(error == 0); return 0; failed: VERIFY(error != 0); lck_rw_lock_exclusive(&in6_ifaddr_rwlock); IFA_LOCK(&ia->ia_ifa); if (IA6_IS_HASHED(ia)) { in6_iahash_remove(ia); } IFA_UNLOCK(&ia->ia_ifa); lck_rw_done(&in6_ifaddr_rwlock); return error; } void in6_purgeaddrs(struct ifnet *ifp) { in6_purgeif(ifp); } /* * Find an IPv6 interface link-local address specific to an interface. */ struct in6_ifaddr * in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) { struct ifaddr *__single ifa; if (ifp == NULL) { return NULL; } ifnet_lock_shared(ifp); TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { IFA_LOCK_SPIN(ifa); if (ifa->ifa_addr->sa_family != AF_INET6) { IFA_UNLOCK(ifa); continue; } if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { if (((ifatoia6(ifa))->ia6_flags & ignoreflags) != 0) { IFA_UNLOCK(ifa); continue; } ifa_addref(ifa); /* for caller */ IFA_UNLOCK(ifa); break; } IFA_UNLOCK(ifa); } ifnet_lock_done(ifp); return ifatoia6(ifa); } struct in6_ifaddr * in6ifa_ifpwithflag(struct ifnet * ifp, int flag) { struct ifaddr *__single ifa; ifnet_lock_shared(ifp); TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { IFA_LOCK_SPIN(ifa); if (ifa->ifa_addr->sa_family != AF_INET6) { IFA_UNLOCK(ifa); continue; } if ((ifatoia6(ifa)->ia6_flags & flag) == flag) { ifa_addref(ifa); IFA_UNLOCK(ifa); break; } IFA_UNLOCK(ifa); } ifnet_lock_done(ifp); return ifatoia6(ifa); } /* * find the internet address corresponding to a given interface and address. */ struct in6_ifaddr * in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) { struct ifaddr *__single ifa; ifnet_lock_shared(ifp); TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { IFA_LOCK_SPIN(ifa); if (ifa->ifa_addr->sa_family != AF_INET6) { IFA_UNLOCK(ifa); continue; } if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { ifa_addref(ifa); /* for caller */ IFA_UNLOCK(ifa); break; } IFA_UNLOCK(ifa); } ifnet_lock_done(ifp); return ifatoia6(ifa); } struct in6_ifaddr * in6ifa_prproxyaddr(struct in6_addr *addr, uint32_t ifscope) { struct in6_ifaddr *__single ia; lck_rw_lock_shared(&in6_ifaddr_rwlock); TAILQ_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { IFA_LOCK(&ia->ia_ifa); if (in6_are_addr_equal_scoped(addr, IFA_IN6(&ia->ia_ifa), ifscope, ia->ia_ifp->if_index)) { ifa_addref(&ia->ia_ifa); /* for caller */ IFA_UNLOCK(&ia->ia_ifa); break; } IFA_UNLOCK(&ia->ia_ifa); } lck_rw_done(&in6_ifaddr_rwlock); if (ia != NULL && !nd6_prproxy_ifaddr(ia)) { ifa_remref(&ia->ia_ifa); ia = NULL; } return ia; } void in6ifa_getlifetime(struct in6_ifaddr *ia6, struct in6_addrlifetime *t_dst, int iscalendar) { struct in6_addrlifetime_i *__single t_src = &ia6->ia6_lifetime; struct timeval caltime; t_dst->ia6t_vltime = t_src->ia6ti_vltime; t_dst->ia6t_pltime = t_src->ia6ti_pltime; t_dst->ia6t_expire = 0; t_dst->ia6t_preferred = 0; /* account for system time change */ getmicrotime(&caltime); t_src->ia6ti_base_calendartime += NET_CALCULATE_CLOCKSKEW(caltime, t_src->ia6ti_base_calendartime, net_uptime(), t_src->ia6ti_base_uptime); if (iscalendar) { if (t_src->ia6ti_expire != 0 && t_src->ia6ti_vltime != ND6_INFINITE_LIFETIME) { t_dst->ia6t_expire = (time_t)(t_src->ia6ti_base_calendartime + t_src->ia6ti_expire - t_src->ia6ti_base_uptime); } if (t_src->ia6ti_preferred != 0 && t_src->ia6ti_pltime != ND6_INFINITE_LIFETIME) { t_dst->ia6t_preferred = (time_t)(t_src->ia6ti_base_calendartime + t_src->ia6ti_preferred - t_src->ia6ti_base_uptime); } } else { if (t_src->ia6ti_expire != 0 && t_src->ia6ti_vltime != ND6_INFINITE_LIFETIME) { t_dst->ia6t_expire = (time_t)t_src->ia6ti_expire; } if (t_src->ia6ti_preferred != 0 && t_src->ia6ti_pltime != ND6_INFINITE_LIFETIME) { t_dst->ia6t_preferred = (time_t)t_src->ia6ti_preferred; } } } void in6ifa_setlifetime(struct in6_ifaddr *ia6, struct in6_addrlifetime *t_src) { struct in6_addrlifetime_i *__single t_dst = &ia6->ia6_lifetime; struct timeval caltime; /* account for system time change */ getmicrotime(&caltime); t_dst->ia6ti_base_calendartime += NET_CALCULATE_CLOCKSKEW(caltime, t_dst->ia6ti_base_calendartime, net_uptime(), t_dst->ia6ti_base_uptime); /* trust the caller for the values */ t_dst->ia6ti_expire = t_src->ia6t_expire; t_dst->ia6ti_preferred = t_src->ia6t_preferred; t_dst->ia6ti_vltime = t_src->ia6t_vltime; t_dst->ia6ti_pltime = t_src->ia6t_pltime; } /* * Convert IP6 address to printable (loggable) representation. */ const char * ip6_sprintf(const struct in6_addr *addr) { static const char digits[] = "0123456789abcdef"; static unsigned int ip6round = 0; static char ip6buf[8][48]; int i; char *cp; const u_short *a = (const u_short *)(const struct in6_addr *__bidi_indexable)addr; const u_char *d; u_char n; int dcolon = 0; int zpad = 0; if (addr == NULL) { return "(null)"; } uint8_t saved_round = os_atomic_inc_orig(&ip6round, relaxed) & 7; cp = ip6buf[saved_round]; for (i = 0; i < 8; i++) { if (dcolon == 1) { if (*a == 0) { if (i == 7) { *cp++ = ':'; } a++; continue; } else { dcolon = 2; } } if (*a == 0) { if (dcolon == 0 && i < 7 && *(a + 1) == 0) { if (i == 0) { *cp++ = ':'; } *cp++ = ':'; dcolon = 1; } else { *cp++ = '0'; *cp++ = ':'; } a++; continue; } d = (const u_char *)a; zpad = 0; if ((n = *d >> 4) != 0) { *cp++ = digits[n]; zpad = 1; } if ((n = *d++ & 0xf) != 0 || zpad) { *cp++ = digits[n]; zpad = 1; } if ((n = *d >> 4) != 0 || zpad) { *cp++ = digits[n]; zpad = 1; } if ((n = *d & 0xf) != 0 || zpad) { *cp++ = digits[n]; } *cp++ = ':'; a++; } *--cp = 0; return __unsafe_null_terminated_from_indexable(ip6buf[saved_round], cp); } int in6addr_local(struct in6_addr *in6) { rtentry_ref_t rt; struct sockaddr_in6 sin6; int local = 0; if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_SCOPE_LINKLOCAL(in6)) { return 1; } sin6.sin6_family = AF_INET6; sin6.sin6_len = sizeof(sin6); bcopy(in6, &sin6.sin6_addr, sizeof(*in6)); rt = rtalloc1(SA(&sin6), 0, 0); if (rt != NULL) { RT_LOCK_SPIN(rt); if (rt->rt_gateway->sa_family == AF_LINK) { local = 1; } RT_UNLOCK(rt); rtfree(rt); } else { local = in6_localaddr(in6); } return local; } int in6_localaddr(struct in6_addr *in6) { struct in6_ifaddr *__single ia; if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6) || IN6_IS_ADDR_MC_UNICAST_BASED_LINKLOCAL(in6)) { return 1; } lck_rw_lock_shared(&in6_ifaddr_rwlock); TAILQ_FOREACH(ia, &in6_ifaddrhead, ia6_link) { IFA_LOCK_SPIN(&ia->ia_ifa); if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, &ia->ia_prefixmask.sin6_addr)) { IFA_UNLOCK(&ia->ia_ifa); lck_rw_done(&in6_ifaddr_rwlock); return 1; } IFA_UNLOCK(&ia->ia_ifa); } lck_rw_done(&in6_ifaddr_rwlock); return 0; } /* * return length of part which dst and src are equal * hard coding... */ int in6_matchlen(struct in6_addr *src, struct in6_addr *dst) { int match = 0; u_char *__bidi_indexable s = (u_char *)(struct in6_addr *__bidi_indexable)src; u_char *__bidi_indexable d = (u_char *)(struct in6_addr *__bidi_indexable)dst; u_char *lim = s + 16, r; while (s < lim) { if ((r = (*d++ ^ *s++)) != 0) { while (r < 128) { match++; r = (u_char)(r << 1); } break; } else { match += 8; } } return match; } /* XXX: to be scope conscious */ int in6_are_prefix_equal(struct in6_addr *p1, uint32_t ifscope1, struct in6_addr *p2, uint32_t ifscope2, int len) { int bytelen, bitlen; /* sanity check */ if (0 > len || len > 128) { log(LOG_ERR, "%s: invalid prefix length(%d)\n", __func__, len); return 0; } bytelen = len / 8; bitlen = len % 8; if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) { return 0; } if (bitlen != 0 && p1->s6_addr[bytelen] >> (8 - bitlen) != p2->s6_addr[bytelen] >> (8 - bitlen)) { return 0; } if (IN6_IS_SCOPE_EMBED(p1) && !in6_embedded_scope) { return ifscope1 == ifscope2; } return 1; } void in6_prefixlen2mask(struct in6_addr *maskp, int len) { u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; int bytelen, bitlen, i; /* sanity check */ if (0 > len || len > 128) { log(LOG_ERR, "%s: invalid prefix length(%d)\n", __func__, len); return; } bzero(maskp, sizeof(*maskp)); bytelen = len / 8; bitlen = len % 8; for (i = 0; i < bytelen; i++) { maskp->s6_addr[i] = 0xff; } if (bitlen) { maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; } } /* * return the best address out of the same scope */ struct in6_ifaddr * in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst) { int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0; int blen = -1; struct ifaddr *__single ifa; ifnet_ref_t ifp; struct in6_ifaddr *__single ifa_best = NULL; if (oifp == NULL) { return NULL; } /* * We search for all addresses on all interfaces from the beginning. * Comparing an interface with the outgoing interface will be done * only at the final stage of tiebreaking. */ ifnet_head_lock_shared(); TAILQ_FOREACH(ifp, &ifnet_head, if_list) { /* * We can never take an address that breaks the scope zone * of the destination. */ if (in6_addr2scopeid(ifp, dst) != in6_addr2scopeid(oifp, dst)) { continue; } ifnet_lock_shared(ifp); TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { int tlen = -1, dscopecmp, bscopecmp, matchcmp; IFA_LOCK(ifa); if (ifa->ifa_addr->sa_family != AF_INET6) { IFA_UNLOCK(ifa); continue; } src_scope = in6_addrscope(IFA_IN6(ifa)); /* * Don't use an address before completing DAD * nor a duplicated address. */ if ((ifatoia6(ifa))->ia6_flags & (IN6_IFF_NOTREADY | IN6_IFF_CLAT46)) { IFA_UNLOCK(ifa); continue; } /* XXX: is there any case to allow anycasts? */ if ((ifatoia6(ifa))->ia6_flags & IN6_IFF_ANYCAST) { IFA_UNLOCK(ifa); continue; } if ((ifatoia6(ifa))->ia6_flags & IN6_IFF_DETACHED) { IFA_UNLOCK(ifa); continue; } /* * If this is the first address we find, * keep it anyway. */ if (ifa_best == NULL) { goto replace; } /* * ifa_best is never NULL beyond this line except * within the block labeled "replace". */ /* * If ifa_best has a smaller scope than dst and * the current address has a larger one than * (or equal to) dst, always replace ifa_best. * Also, if the current address has a smaller scope * than dst, ignore it unless ifa_best also has a * smaller scope. * Consequently, after the two if-clause below, * the followings must be satisfied: * (scope(src) < scope(dst) && * scope(best) < scope(dst)) * OR * (scope(best) >= scope(dst) && * scope(src) >= scope(dst)) */ if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 && IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0) { goto replace; /* (A) */ } if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 && IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0) { IFA_UNLOCK(ifa); continue; /* (B) */ } /* * A deprecated address SHOULD NOT be used in new * communications if an alternate (non-deprecated) * address is available and has sufficient scope. * RFC 4862, Section 5.5.4. */ if ((ifatoia6(ifa))->ia6_flags & IN6_IFF_DEPRECATED) { /* * Ignore any deprecated addresses if * specified by configuration. */ if (!ip6_use_deprecated) { IFA_UNLOCK(ifa); continue; } /* * If we have already found a non-deprecated * candidate, just ignore deprecated addresses. */ if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) == 0) { IFA_UNLOCK(ifa); continue; } } /* * A non-deprecated address is always preferred * to a deprecated one regardless of scopes and * address matching (Note invariants ensured by the * conditions (A) and (B) above.) */ if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) && ((ifatoia6(ifa))->ia6_flags & IN6_IFF_DEPRECATED) == 0) { goto replace; } /* * When we use temporary addresses described in * RFC 4941, we prefer temporary addresses to * public autoconf addresses. Again, note the * invariants from (A) and (B). Also note that we * don't have any preference between static addresses * and autoconf addresses (despite of whether or not * the latter is temporary or public.) */ if (ip6_use_tempaddr) { struct in6_ifaddr *__single ifat; ifat = ifatoia6(ifa); if ((ifa_best->ia6_flags & (IN6_IFF_AUTOCONF | IN6_IFF_TEMPORARY)) == IN6_IFF_AUTOCONF && (ifat->ia6_flags & (IN6_IFF_AUTOCONF | IN6_IFF_TEMPORARY)) == (IN6_IFF_AUTOCONF | IN6_IFF_TEMPORARY)) { goto replace; } if ((ifa_best->ia6_flags & (IN6_IFF_AUTOCONF | IN6_IFF_TEMPORARY)) == (IN6_IFF_AUTOCONF | IN6_IFF_TEMPORARY) && (ifat->ia6_flags & (IN6_IFF_AUTOCONF | IN6_IFF_TEMPORARY)) == IN6_IFF_AUTOCONF) { IFA_UNLOCK(ifa); continue; } } /* * At this point, we have two cases: * 1. we are looking at a non-deprecated address, * and ifa_best is also non-deprecated. * 2. we are looking at a deprecated address, * and ifa_best is also deprecated. * Also, we do not have to consider a case where * the scope of if_best is larger(smaller) than dst and * the scope of the current address is smaller(larger) * than dst. Such a case has already been covered. * Tiebreaking is done according to the following * items: * - the scope comparison between the address and * dst (dscopecmp) * - the scope comparison between the address and * ifa_best (bscopecmp) * - if the address match dst longer than ifa_best * (matchcmp) * - if the address is on the outgoing I/F (outI/F) * * Roughly speaking, the selection policy is * - the most important item is scope. The same scope * is best. Then search for a larger scope. * Smaller scopes are the last resort. * - A deprecated address is chosen only when we have * no address that has an enough scope, but is * prefered to any addresses of smaller scopes * (this must be already done above.) * - addresses on the outgoing I/F are preferred to * ones on other interfaces if none of above * tiebreaks. In the table below, the column "bI" * means if the best_ifa is on the outgoing * interface, and the column "sI" means if the ifa * is on the outgoing interface. * - If there is no other reasons to choose one, * longest address match against dst is considered. * * The precise decision table is as follows: * dscopecmp bscopecmp match bI oI | replace? * N/A equal N/A Y N | No (1) * N/A equal N/A N Y | Yes (2) * N/A equal larger N/A | Yes (3) * N/A equal !larger N/A | No (4) * larger larger N/A N/A | No (5) * larger smaller N/A N/A | Yes (6) * smaller larger N/A N/A | Yes (7) * smaller smaller N/A N/A | No (8) * equal smaller N/A N/A | Yes (9) * equal larger (already done at A above) */ dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope); bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope); if (bscopecmp == 0) { ifnet_ref_t bifp = ifa_best->ia_ifp; if (bifp == oifp && ifp != oifp) { /* (1) */ IFA_UNLOCK(ifa); continue; } if (bifp != oifp && ifp == oifp) { /* (2) */ goto replace; } /* * Both bifp and ifp are on the outgoing * interface, or both two are on a different * interface from the outgoing I/F. * now we need address matching against dst * for tiebreaking. */ tlen = in6_matchlen(IFA_IN6(ifa), dst); matchcmp = tlen - blen; if (matchcmp > 0) { /* (3) */ goto replace; } IFA_UNLOCK(ifa); continue; /* (4) */ } if (dscopecmp > 0) { if (bscopecmp > 0) { /* (5) */ IFA_UNLOCK(ifa); continue; } goto replace; /* (6) */ } if (dscopecmp < 0) { if (bscopecmp > 0) { /* (7) */ goto replace; } IFA_UNLOCK(ifa); continue; /* (8) */ } /* now dscopecmp must be 0 */ if (bscopecmp < 0) { goto replace; /* (9) */ } replace: ifa_addref(ifa); /* for ifa_best */ blen = tlen >= 0 ? tlen : in6_matchlen(IFA_IN6(ifa), dst); best_scope = in6_addrscope(&ifatoia6(ifa)->ia_addr.sin6_addr); IFA_UNLOCK(ifa); if (ifa_best) { ifa_remref(&ifa_best->ia_ifa); } ifa_best = ifatoia6(ifa); } ifnet_lock_done(ifp); } ifnet_head_done(); /* count statistics for future improvements */ if (ifa_best == NULL) { ip6stat.ip6s_sources_none++; } else { IFA_LOCK_SPIN(&ifa_best->ia_ifa); if (oifp == ifa_best->ia_ifp) { ip6stat.ip6s_sources_sameif[best_scope]++; } else { ip6stat.ip6s_sources_otherif[best_scope]++; } if (best_scope == dst_scope) { ip6stat.ip6s_sources_samescope[best_scope]++; } else { ip6stat.ip6s_sources_otherscope[best_scope]++; } if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) != 0) { ip6stat.ip6s_sources_deprecated[best_scope]++; } IFA_UNLOCK(&ifa_best->ia_ifa); } return ifa_best; } /* * return the best address out of the same scope. if no address was * found, return the first valid address from designated IF. */ struct in6_ifaddr * in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) { int dst_scope = in6_addrscope(dst), blen = -1, tlen; struct ifaddr *__single ifa; struct in6_ifaddr *__single besta = NULL; struct in6_ifaddr *__single dep[2]; /* last-resort: deprecated */ dep[0] = dep[1] = NULL; /* * We first look for addresses in the same scope. * If there is one, return it. * If two or more, return one which matches the dst longest. * If none, return one of global addresses assigned other ifs. */ ifnet_lock_shared(ifp); TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { IFA_LOCK(ifa); if (ifa->ifa_addr->sa_family != AF_INET6) { IFA_UNLOCK(ifa); continue; } if (ifatoia6(ifa)->ia6_flags & IN6_IFF_ANYCAST) { IFA_UNLOCK(ifa); continue; /* XXX: is there any case to allow anycast? */ } if (ifatoia6(ifa)->ia6_flags & (IN6_IFF_NOTREADY | IN6_IFF_CLAT46)) { IFA_UNLOCK(ifa); continue; /* don't use this interface */ } if (ifatoia6(ifa)->ia6_flags & IN6_IFF_DETACHED) { IFA_UNLOCK(ifa); continue; } if (ifatoia6(ifa)->ia6_flags & IN6_IFF_DEPRECATED) { if (ip6_use_deprecated) { ifa_addref(ifa); /* for dep[0] */ IFA_UNLOCK(ifa); if (dep[0] != NULL) { ifa_remref(&dep[0]->ia_ifa); } dep[0] = ifatoia6(ifa); } else { IFA_UNLOCK(ifa); } continue; } if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { /* * call in6_matchlen() as few as possible */ if (besta) { if (blen == -1) { IFA_UNLOCK(ifa); IFA_LOCK(&besta->ia_ifa); blen = in6_matchlen( &besta->ia_addr.sin6_addr, (struct in6_addr*__indexable)dst); IFA_UNLOCK(&besta->ia_ifa); IFA_LOCK(ifa); } tlen = in6_matchlen(IFA_IN6(ifa), (struct in6_addr*__indexable)dst); if (tlen > blen) { blen = tlen; ifa_addref(ifa); /* for besta */ IFA_UNLOCK(ifa); ifa_remref(&besta->ia_ifa); besta = ifatoia6(ifa); } else { IFA_UNLOCK(ifa); } } else { besta = ifatoia6(ifa); ifa_addref(ifa); /* for besta */ IFA_UNLOCK(ifa); } } else { IFA_UNLOCK(ifa); } } if (besta) { ifnet_lock_done(ifp); if (dep[0] != NULL) { ifa_remref(&dep[0]->ia_ifa); } return besta; } TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { IFA_LOCK(ifa); if (ifa->ifa_addr->sa_family != AF_INET6) { IFA_UNLOCK(ifa); continue; } if (ifatoia6(ifa)->ia6_flags & IN6_IFF_ANYCAST) { IFA_UNLOCK(ifa); continue; /* XXX: is there any case to allow anycast? */ } if (ifatoia6(ifa)->ia6_flags & (IN6_IFF_NOTREADY | IN6_IFF_CLAT46)) { IFA_UNLOCK(ifa); continue; /* don't use this interface */ } if (ifatoia6(ifa)->ia6_flags & IN6_IFF_DETACHED) { IFA_UNLOCK(ifa); continue; } if (ifatoia6(ifa)->ia6_flags & IN6_IFF_DEPRECATED) { if (ip6_use_deprecated) { ifa_addref(ifa); /* for dep[1] */ IFA_UNLOCK(ifa); if (dep[1] != NULL) { ifa_remref(&dep[1]->ia_ifa); } dep[1] = ifatoia6(ifa); } else { IFA_UNLOCK(ifa); } continue; } ifa_addref(ifa); /* for caller */ IFA_UNLOCK(ifa); ifnet_lock_done(ifp); if (dep[0] != NULL) { ifa_remref(&dep[0]->ia_ifa); } if (dep[1] != NULL) { ifa_remref(&dep[1]->ia_ifa); } return ifatoia6(ifa); } ifnet_lock_done(ifp); /* use the last-resort values, that are, deprecated addresses */ if (dep[0]) { if (dep[1] != NULL) { ifa_remref(&dep[1]->ia_ifa); } return dep[0]; } if (dep[1]) { return dep[1]; } return NULL; } /* * perform DAD when interface becomes IFF_UP. */ static void in6_if_up_dad_start(struct ifnet *ifp) { struct ifaddr *__single ifa; struct nd_ifinfo *__single ndi = NULL; ndi = ND_IFINFO(ifp); VERIFY((NULL != ndi) && (TRUE == ndi->initialized)); if (!(ndi->flags & ND6_IFF_DAD)) { return; } /* start DAD on all the interface addresses */ ifnet_lock_exclusive(ifp); TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { struct in6_ifaddr *ia6; IFA_LOCK_SPIN(ifa); if (ifa->ifa_addr->sa_family != AF_INET6) { IFA_UNLOCK(ifa); continue; } ia6 = ifatoia6(ifa); if (ia6->ia6_flags & IN6_IFF_DADPROGRESS) { int delay = 0; /* delay ticks before DAD output */ IFA_UNLOCK(ifa); nd6_dad_start(ifa, &delay); } else { IFA_UNLOCK(ifa); } } ifnet_lock_done(ifp); } int in6if_do_dad( struct ifnet *ifp) { struct nd_ifinfo *__single ndi = NULL; if ((ifp->if_flags & IFF_LOOPBACK) != 0) { return 0; } ndi = ND_IFINFO(ifp); VERIFY((NULL != ndi) && (TRUE == ndi->initialized)); if (!(ndi->flags & ND6_IFF_DAD)) { return 0; } /* * If we are using the alternative neighbor discovery * interface on this interface, then skip DAD. * * Also, skip it for interfaces marked "local private" * for now, even when not marked as using the alternative * interface. This is for historical reasons. */ if (ifp->if_eflags & (IFEF_IPV6_ND6ALT | IFEF_LOCALNET_PRIVATE | IFEF_DIRECTLINK)) { return 0; } if (ifp->if_family == IFNET_FAMILY_IPSEC || ifp->if_family == IFNET_FAMILY_UTUN) { /* * Ignore DAD for tunneling virtual interfaces, which get * their IPv6 address explicitly assigned. */ return 0; } switch (ifp->if_type) { #if IFT_DUMMY case IFT_DUMMY: #endif case IFT_FAITH: /* * These interfaces do not have the IFF_LOOPBACK flag, * but loop packets back. We do not have to do DAD on such * interfaces. We should even omit it, because loop-backed * NS would confuse the DAD procedure. */ return 0; default: /* * Our DAD routine requires the interface up and running. * However, some interfaces can be up before the RUNNING * status. Additionally, users may try to assign addresses * before the interface becomes up (or running). * We simply skip DAD in such a case as a work around. * XXX: we should rather mark "tentative" on such addresses, * and do DAD after the interface becomes ready. */ if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING)) { return 0; } return 1; } } /* * Calculate max IPv6 MTU through all the interfaces and store it * to in6_maxmtu. */ void in6_setmaxmtu(void) { u_int32_t maxmtu = 0; ifnet_ref_t ifp; ifnet_head_lock_shared(); TAILQ_FOREACH(ifp, &ifnet_head, if_list) { struct nd_ifinfo *__single ndi = NULL; if ((ndi = ND_IFINFO(ifp)) != NULL && !ndi->initialized) { ndi = NULL; } if (ndi != NULL) { lck_mtx_lock(&ndi->lock); } if ((ifp->if_flags & IFF_LOOPBACK) == 0 && IN6_LINKMTU(ifp) > maxmtu) { maxmtu = IN6_LINKMTU(ifp); } if (ndi != NULL) { lck_mtx_unlock(&ndi->lock); } } ifnet_head_done(); if (maxmtu) { /* update only when maxmtu is positive */ in6_maxmtu = maxmtu; } } /* * Provide the length of interface identifiers to be used for the link attached * to the given interface. The length should be defined in "IPv6 over * xxx-link" document. Note that address architecture might also define * the length for a particular set of address prefixes, regardless of the * link type. Also see RFC 4862 for additional background. */ int in6_if2idlen(struct ifnet *ifp) { switch (ifp->if_type) { case IFT_ETHER: /* RFC2464 */ case IFT_IEEE8023ADLAG: /* IEEE802.3ad Link Aggregate */ #ifdef IFT_PROPVIRTUAL case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ #endif #ifdef IFT_L2VLAN case IFT_L2VLAN: /* ditto */ #endif #ifdef IFT_IEEE80211 case IFT_IEEE80211: /* ditto */ #endif #ifdef IFT_MIP case IFT_MIP: /* ditto */ #endif return 64; case IFT_FDDI: /* RFC2467 */ return 64; case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ return 64; case IFT_PPP: /* RFC2472 */ return 64; case IFT_ARCNET: /* RFC2497 */ return 64; case IFT_FRELAY: /* RFC2590 */ return 64; case IFT_IEEE1394: /* RFC3146 */ return 64; case IFT_GIF: return 64; /* draft-ietf-v6ops-mech-v2-07 */ case IFT_LOOP: return 64; /* XXX: is this really correct? */ case IFT_OTHER: return 64; /* for utun interfaces */ case IFT_CELLULAR: return 64; /* Packet Data over Cellular */ case IFT_BRIDGE: return 64; /* Transparent bridge interface */ default: /* * Unknown link type: * It might be controversial to use the today's common constant * of 64 for these cases unconditionally. For full compliance, * we should return an error in this case. On the other hand, * if we simply miss the standard for the link type or a new * standard is defined for a new link type, the IFID length * is very likely to be the common constant. As a compromise, * we always use the constant, but make an explicit notice * indicating the "unknown" case. */ log(LOG_NOTICE, "%s: unknown link type (%d)\n", __func__, ifp->if_type); return 64; } } /* * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be * v4 mapped addr or v4 compat addr */ void in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) { SOCKADDR_ZERO(sin, sizeof(*sin)); sin->sin_len = sizeof(struct sockaddr_in); sin->sin_family = AF_INET; sin->sin_port = sin6->sin6_port; sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; } /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ void in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) { SOCKADDR_ZERO(sin6, sizeof(*sin6)); sin6->sin6_len = sizeof(struct sockaddr_in6); sin6->sin6_family = AF_INET6; sin6->sin6_port = sin->sin_port; sin6->sin6_addr.s6_addr32[0] = 0; sin6->sin6_addr.s6_addr32[1] = 0; if (sin->sin_addr.s_addr) { sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; } else { sin6->sin6_addr.s6_addr32[2] = 0; sin6->sin6_addr.s6_addr32[3] = 0; } } /* Convert sockaddr_in6 into sockaddr_in. */ void in6_sin6_2_sin_in_sock(struct sockaddr *nam) { struct sockaddr_in *__single sin_p; struct sockaddr_in6 sin6; /* * Save original sockaddr_in6 addr and convert it * to sockaddr_in. */ sin6 = *SIN6(nam); sin_p = SIN(nam); in6_sin6_2_sin(sin_p, &sin6); } /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ int in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) { struct sockaddr_in *__single sin_p; struct sockaddr_in6 *__single sin6_p; sin6_p = SIN6(alloc_sockaddr(sizeof(*sin6_p), Z_WAITOK | Z_NOFAIL)); sin_p = SIN(*nam); in6_sin_2_v4mapsin6(sin_p, sin6_p); free_sockaddr(*nam); *nam = SA(sin6_p); return 0; } /* * Posts in6_event_data message kernel events. * * To get the same size of kev_in6_data between ILP32 and LP64 data models * we are using a special version of the in6_addrlifetime structure that * uses only 32 bits fields to be compatible with Leopard, and that * are large enough to span 68 years. */ void in6_post_msg(struct ifnet *ifp, u_int32_t event_code, struct in6_ifaddr *ifa, uint8_t *__sized_by(maclen)mac, size_t maclen) { struct kev_msg ev_msg; struct kev_in6_data in6_event_data; struct in6_addrlifetime ia6_lt; bzero(&in6_event_data, sizeof(struct kev_in6_data)); bzero(&ev_msg, sizeof(struct kev_msg)); ev_msg.vendor_code = KEV_VENDOR_APPLE; ev_msg.kev_class = KEV_NETWORK_CLASS; ev_msg.kev_subclass = KEV_INET6_SUBCLASS; ev_msg.event_code = event_code; if (ifa) { IFA_LOCK(&ifa->ia_ifa); in6_event_data.ia_addr = ifa->ia_addr; in6_event_data.ia_net = ifa->ia_net; in6_event_data.ia_dstaddr = ifa->ia_dstaddr; in6_event_data.ia_prefixmask = ifa->ia_prefixmask; in6_event_data.ia_plen = ifa->ia_plen; in6_event_data.ia6_flags = (u_int32_t)ifa->ia6_flags; /* retrieve time as calendar time (last arg is 1) */ in6ifa_getlifetime(ifa, &ia6_lt, 1); in6_event_data.ia_lifetime.ia6t_expire = (u_int32_t)ia6_lt.ia6t_expire; in6_event_data.ia_lifetime.ia6t_preferred = (u_int32_t)ia6_lt.ia6t_preferred; in6_event_data.ia_lifetime.ia6t_vltime = ia6_lt.ia6t_vltime; in6_event_data.ia_lifetime.ia6t_pltime = ia6_lt.ia6t_pltime; IFA_UNLOCK(&ifa->ia_ifa); } if (ifp != NULL) { (void) strlcpy(&in6_event_data.link_data.if_name[0], ifp->if_name, IFNAMSIZ); in6_event_data.link_data.if_family = ifp->if_family; in6_event_data.link_data.if_unit = (u_int32_t)ifp->if_unit; } if (mac != NULL) { VERIFY(maclen <= sizeof(in6_event_data.ia_mac)); memcpy(&in6_event_data.ia_mac, mac, maclen); } ev_msg.dv[0].data_ptr = &in6_event_data; ev_msg.dv[0].data_length = sizeof(in6_event_data); ev_msg.dv[1].data_length = 0; dlil_post_complete_msg(NULL, &ev_msg); } /* * Called as part of ip6_init */ void in6_ifaddr_init(void) { in6_cga_init(); } static struct in6_ifaddr * in6_ifaddr_alloc(zalloc_flags_t how) { struct in6_ifaddr *__single in6ifa; in6ifa = kalloc_type(struct in6_ifaddr, Z_ZERO | how); if (in6ifa == NULL) { return NULL; } in6ifa->ia_ifa.ifa_free = in6_ifaddr_free; in6ifa->ia_ifa.ifa_debug |= IFD_ALLOC; in6ifa->ia_ifa.ifa_del_wc = &in6ifa->ia_ifa.ifa_debug; in6ifa->ia_ifa.ifa_del_waiters = 0; ifa_lock_init(&in6ifa->ia_ifa); ifa_initref(&in6ifa->ia_ifa); return in6ifa; } static void in6_ifaddr_free(struct ifaddr *ifa) { struct in6_ifaddr *in6ifa = ifatoia6(ifa); IFA_LOCK_ASSERT_HELD(ifa); if (!(ifa->ifa_debug & IFD_ALLOC)) { panic("%s: ifa %p cannot be freed", __func__, ifa); /* NOTREACHED */ } IFA_UNLOCK(ifa); ifa_lock_destroy(ifa); kfree_type(struct in6_ifaddr, in6ifa); } /* * Handle SIOCGASSOCIDS ioctl for PF_INET6 domain. */ static int in6_getassocids(struct socket *so, uint32_t *cnt, user_addr_t aidp) { struct in6pcb *__single in6p = sotoin6pcb(so); sae_associd_t aid; if (in6p == NULL || in6p->inp_state == INPCB_STATE_DEAD) { return EINVAL; } /* IN6PCB has no concept of association */ aid = SAE_ASSOCID_ANY; *cnt = 0; /* just asking how many there are? */ if (aidp == USER_ADDR_NULL) { return 0; } return copyout(&aid, aidp, sizeof(aid)); } /* * Handle SIOCGCONNIDS ioctl for PF_INET6 domain. */ static int in6_getconnids(struct socket *so, sae_associd_t aid, uint32_t *cnt, user_addr_t cidp) { struct in6pcb *__single in6p = sotoin6pcb(so); sae_connid_t cid; if (in6p == NULL || in6p->inp_state == INPCB_STATE_DEAD) { return EINVAL; } if (aid != SAE_ASSOCID_ANY && aid != SAE_ASSOCID_ALL) { return EINVAL; } /* if connected, return 1 connection count */ *cnt = ((so->so_state & SS_ISCONNECTED) ? 1 : 0); /* just asking how many there are? */ if (cidp == USER_ADDR_NULL) { return 0; } /* if IN6PCB is connected, assign it connid 1 */ cid = ((*cnt != 0) ? 1 : SAE_CONNID_ANY); return copyout(&cid, cidp, sizeof(cid)); } /* * Handle SIOCGCONNINFO ioctl for PF_INET6 domain. */ int in6_getconninfo(struct socket *so, sae_connid_t cid, uint32_t *flags, uint32_t *ifindex, int32_t *soerror, user_addr_t src, socklen_t *src_len, user_addr_t dst, socklen_t *dst_len, uint32_t *aux_type, user_addr_t aux_data, uint32_t *aux_len) { struct in6pcb *__single in6p = sotoin6pcb(so); struct sockaddr_in6 sin6; struct ifnet *ifp = NULL; int error = 0; u_int32_t copy_len = 0; /* * Don't test for INPCB_STATE_DEAD since this may be called * after SOF_PCBCLEARING is set, e.g. after tcp_close(). */ if (in6p == NULL) { error = EINVAL; goto out; } if (cid != SAE_CONNID_ANY && cid != SAE_CONNID_ALL && cid != 1) { error = EINVAL; goto out; } ifp = in6p->in6p_last_outifp; *ifindex = ((ifp != NULL) ? ifp->if_index : 0); *soerror = so->so_error; *flags = 0; if (so->so_state & SS_ISCONNECTED) { *flags |= (CIF_CONNECTED | CIF_PREFERRED); } if (in6p->in6p_flags & INP_BOUND_IF) { *flags |= CIF_BOUND_IF; } if (!(in6p->in6p_flags & INP_IN6ADDR_ANY)) { *flags |= CIF_BOUND_IP; } if (!(in6p->in6p_flags & INP_ANONPORT)) { *flags |= CIF_BOUND_PORT; } SOCKADDR_ZERO(&sin6, sizeof(sin6)); sin6.sin6_len = sizeof(sin6); sin6.sin6_family = AF_INET6; /* source address and port */ sin6.sin6_port = in6p->in6p_lport; if (!in6_embedded_scope) { sin6.sin6_scope_id = in6p->inp_lifscope; } in6_recoverscope(&sin6, &in6p->in6p_laddr, NULL); if (*src_len == 0) { *src_len = sin6.sin6_len; } else { if (src != USER_ADDR_NULL) { copy_len = min(*src_len, sizeof(sin6)); error = copyout(&sin6, src, copy_len); if (error != 0) { goto out; } *src_len = copy_len; } } /* destination address and port */ sin6.sin6_port = in6p->in6p_fport; if (!in6_embedded_scope) { sin6.sin6_scope_id = in6p->inp_fifscope; } in6_recoverscope(&sin6, &in6p->in6p_faddr, NULL); if (*dst_len == 0) { *dst_len = sin6.sin6_len; } else { if (dst != USER_ADDR_NULL) { copy_len = min(*dst_len, sizeof(sin6)); error = copyout(&sin6, dst, copy_len); if (error != 0) { goto out; } *dst_len = copy_len; } } if (SOCK_PROTO(so) == IPPROTO_TCP) { struct conninfo_tcp tcp_ci; *aux_type = CIAUX_TCP; if (*aux_len == 0) { *aux_len = sizeof(tcp_ci); } else { if (aux_data != USER_ADDR_NULL) { copy_len = min(*aux_len, sizeof(tcp_ci)); bzero(&tcp_ci, sizeof(tcp_ci)); tcp_getconninfo(so, &tcp_ci); error = copyout(&tcp_ci, aux_data, copy_len); if (error != 0) { goto out; } *aux_len = copy_len; } } } else { *aux_type = 0; *aux_len = 0; } out: return error; } /* * 'u' group ioctls. * * The switch statement below does nothing at runtime, as it serves as a * compile time check to ensure that all of the socket 'u' ioctls (those * in the 'u' group going thru soo_ioctl) that are made available by the * networking stack is unique. This works as long as this routine gets * updated each time a new interface ioctl gets added. * * Any failures at compile time indicates duplicated ioctl values. */ static __attribute__((unused)) void in6ioctl_cassert(void) { /* * This is equivalent to static_assert() and the compiler wouldn't * generate any instructions, thus for compile time only. */ switch ((u_long)0) { case 0: /* bsd/netinet6/in6_var.h */ case SIOCAADDRCTL_POLICY: case SIOCDADDRCTL_POLICY: case SIOCDRADD_IN6_32: case SIOCDRADD_IN6_64: case SIOCDRDEL_IN6_32: case SIOCDRDEL_IN6_64: ; } } void in6_ip6_to_sockaddr(const struct in6_addr *ip6, u_int16_t port, uint32_t ifscope, struct sockaddr_in6 *sin6, u_int32_t maxlen) { if (maxlen < sizeof(struct sockaddr_in6)) { return; } *sin6 = (struct sockaddr_in6) { .sin6_family = AF_INET6, .sin6_len = sizeof(*sin6), .sin6_port = port, .sin6_addr = *ip6, .sin6_scope_id = IN6_IS_SCOPE_EMBED(ip6) ? ifscope : IFSCOPE_NONE, }; if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr)) { in6_verify_ifscope(&sin6->sin6_addr, ifscope); if (in6_embedded_scope) { sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); sin6->sin6_addr.s6_addr16[1] = 0; } } } /* IPv6 events */ struct in6_event { in6_evhdlr_code_t in6_event_code; struct ifnet *in6_ifp; struct in6_addr in6_address; uint32_t val; }; struct in6_event2kev in6_event2kev_array[IN6_EVENT_MAX] = { { .in6_event_code = IN6_ADDR_MARKED_DUPLICATED, .in6_event_kev_subclass = KEV_ND6_SUBCLASS, .in6_event_kev_code = KEV_ND6_DAD_FAILURE, .in6_event_str = "IN6_ADDR_MARKED_DUPLICATED", }, { .in6_event_code = IN6_ADDR_MARKED_DETACHED, .in6_event_kev_subclass = KEV_ND6_SUBCLASS, .in6_event_kev_code = KEV_ND6_ADDR_DETACHED, .in6_event_str = "IN6_ADDR_MARKED_DETACHED", }, { .in6_event_code = IN6_ADDR_MARKED_DEPRECATED, .in6_event_kev_subclass = KEV_ND6_SUBCLASS, .in6_event_kev_code = KEV_ND6_ADDR_DEPRECATED, .in6_event_str = "IN6_ADDR_MARKED_DEPRECATED", }, { .in6_event_code = IN6_NDP_RTR_EXPIRY, .in6_event_kev_subclass = KEV_ND6_SUBCLASS, .in6_event_kev_code = KEV_ND6_RTR_EXPIRED, .in6_event_str = "IN6_NDP_RTR_EXPIRY", }, { .in6_event_code = IN6_NDP_PFX_EXPIRY, .in6_event_kev_subclass = KEV_ND6_SUBCLASS, .in6_event_kev_code = KEV_ND6_PFX_EXPIRED, .in6_event_str = "IN6_NDP_PFX_EXPIRY", }, { .in6_event_code = IN6_NDP_ADDR_EXPIRY, .in6_event_kev_subclass = KEV_ND6_SUBCLASS, .in6_event_kev_code = KEV_ND6_ADDR_EXPIRED, .in6_event_str = "IN6_NDP_ADDR_EXPIRY", }, }; void in6_eventhdlr_callback(struct eventhandler_entry_arg arg0 __unused, in6_evhdlr_code_t in6_ev_code, struct ifnet *ifp, struct in6_addr *p_addr6, uint32_t val) { struct kev_msg ev_msg; struct kev_nd6_event nd6_event; bzero(&ev_msg, sizeof(ev_msg)); bzero(&nd6_event, sizeof(nd6_event)); nd6log0(info, "%s Event %s received for %s\n", __func__, in6_event2kev_array[in6_ev_code].in6_event_str, ip6_sprintf(p_addr6)); ev_msg.vendor_code = KEV_VENDOR_APPLE; ev_msg.kev_class = KEV_NETWORK_CLASS; ev_msg.kev_subclass = in6_event2kev_array[in6_ev_code].in6_event_kev_subclass; ev_msg.event_code = in6_event2kev_array[in6_ev_code].in6_event_kev_code; nd6_event.link_data.if_family = ifp->if_family; nd6_event.link_data.if_unit = ifp->if_unit; strlcpy(nd6_event.link_data.if_name, ifp->if_name, sizeof(nd6_event.link_data.if_name)); VERIFY(p_addr6 != NULL); bcopy(p_addr6, &nd6_event.in6_address, sizeof(nd6_event.in6_address)); nd6_event.val = val; ev_msg.dv[0].data_ptr = &nd6_event; ev_msg.dv[0].data_length = sizeof(nd6_event); kev_post_msg(&ev_msg); } struct in6_event_nwk_wq_entry { struct nwk_wq_entry nwk_wqe; struct in6_event in6_ev_arg; }; static void in6_event_callback(struct nwk_wq_entry *nwk_item) { struct in6_event_nwk_wq_entry *__single p_ev; p_ev = __container_of(nwk_item, struct in6_event_nwk_wq_entry, nwk_wqe); EVENTHANDLER_INVOKE(&in6_evhdlr_ctxt, in6_event, p_ev->in6_ev_arg.in6_event_code, p_ev->in6_ev_arg.in6_ifp, &p_ev->in6_ev_arg.in6_address, p_ev->in6_ev_arg.val); kfree_type(struct in6_event_nwk_wq_entry, p_ev); } void in6_event_enqueue_nwk_wq_entry(in6_evhdlr_code_t in6_event_code, struct ifnet *ifp, struct in6_addr *p_addr6, uint32_t val) { struct in6_event_nwk_wq_entry *__single p_in6_ev = NULL; evhlog(debug, "%s: eventhandler enqueuing event of type=in6_evhdlr_code event_code=%s", __func__, in6_evhdlr_code2str(in6_event_code)); p_in6_ev = kalloc_type(struct in6_event_nwk_wq_entry, Z_WAITOK | Z_ZERO | Z_NOFAIL); p_in6_ev->nwk_wqe.func = in6_event_callback; p_in6_ev->in6_ev_arg.in6_event_code = in6_event_code; p_in6_ev->in6_ev_arg.in6_ifp = ifp; if (p_addr6 != NULL) { bcopy(p_addr6, &p_in6_ev->in6_ev_arg.in6_address, sizeof(p_in6_ev->in6_ev_arg.in6_address)); } p_in6_ev->in6_ev_arg.val = val; nwk_wq_enqueue(&p_in6_ev->nwk_wqe); } const char * in6_evhdlr_code2str(in6_evhdlr_code_t code) { switch (code) { #define IN6_EVHDLR_CODE_STRING(type) case type: return #type; IN6_EVHDLR_CODE_STRING(IN6_ADDR_MARKED_DUPLICATED) IN6_EVHDLR_CODE_STRING(IN6_ADDR_MARKED_DETACHED) IN6_EVHDLR_CODE_STRING(IN6_ADDR_MARKED_DEPRECATED) IN6_EVHDLR_CODE_STRING(IN6_NDP_RTR_EXPIRY) IN6_EVHDLR_CODE_STRING(IN6_NDP_PFX_EXPIRY) IN6_EVHDLR_CODE_STRING(IN6_NDP_ADDR_EXPIRY) IN6_EVHDLR_CODE_STRING(IN6_EVENT_MAX) #undef IN6_EVHDLR_CODE_STRING } return "UNKNOWN_IN6_EVHDLR_CODE"; } /* * Caller must hold in6_ifaddr_rwlock as writer. */ static void in6_iahash_remove(struct in6_ifaddr *ia) { LCK_RW_ASSERT(&in6_ifaddr_rwlock, LCK_RW_ASSERT_EXCLUSIVE); IFA_LOCK_ASSERT_HELD(&ia->ia_ifa); if (!IA6_IS_HASHED(ia)) { panic("%s: attempt to remove wrong ia %p from ipv6 hash table", __func__, ia); /* NOTREACHED */ } TAILQ_REMOVE(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); IA6_HASH_INIT(ia); ifa_remref(&ia->ia_ifa); } /* * Caller must hold in6_ifaddr_rwlock as writer. */ static void in6_iahash_insert(struct in6_ifaddr *ia) { LCK_RW_ASSERT(&in6_ifaddr_rwlock, LCK_RW_ASSERT_EXCLUSIVE); IFA_LOCK_ASSERT_HELD(&ia->ia_ifa); if (ia->ia_addr.sin6_family != AF_INET6) { panic("%s: attempt to insert wrong ia %p into hash table", __func__, ia); /* NOTREACHED */ } else if (IA6_IS_HASHED(ia)) { panic("%s: attempt to double-insert ia %p into hash table", __func__, ia); /* NOTREACHED */ } TAILQ_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); ifa_addref(&ia->ia_ifa); } /* * Some point to point interfaces that are tunnels borrow the address from * an underlying interface (e.g. VPN server). In order for source address * selection logic to find the underlying interface first, we add the address * of borrowing point to point interfaces at the end of the list. * (see rdar://6733789) * * Caller must hold in6_ifaddr_rwlock as writer. */ static void in6_iahash_insert_ptp(struct in6_ifaddr *ia) { struct in6_ifaddr *__single tmp_ifa; ifnet_ref_t tmp_ifp; LCK_RW_ASSERT(&in6_ifaddr_rwlock, LCK_RW_ASSERT_EXCLUSIVE); IFA_LOCK_ASSERT_HELD(&ia->ia_ifa); if (ia->ia_addr.sin6_family != AF_INET6) { panic("%s: attempt to insert wrong ia %p into hash table", __func__, ia); /* NOTREACHED */ } else if (IA6_IS_HASHED(ia)) { panic("%s: attempt to double-insert ia %p into hash table", __func__, ia); /* NOTREACHED */ } IFA_UNLOCK(&ia->ia_ifa); TAILQ_FOREACH(tmp_ifa, IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia6_hash) { IFA_LOCK(&tmp_ifa->ia_ifa); /* ia->ia_addr won't change, so check without lock */ if (in6_are_addr_equal_scoped(&tmp_ifa->ia_addr.sin6_addr, &ia->ia_addr.sin6_addr, tmp_ifa->ia_addr.sin6_scope_id, ia->ia_addr.sin6_scope_id)) { IFA_UNLOCK(&tmp_ifa->ia_ifa); break; } IFA_UNLOCK(&tmp_ifa->ia_ifa); } tmp_ifp = (tmp_ifa == NULL) ? NULL : tmp_ifa->ia_ifp; IFA_LOCK(&ia->ia_ifa); if (tmp_ifp == NULL) { TAILQ_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); } else { TAILQ_INSERT_TAIL(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); } ifa_addref(&ia->ia_ifa); } /* * ipv6 socket options. * * The switch statement below does nothing at runtime, as it serves as a * compile time check to ensure that all of the ipv6 socket options are * unique. This works as long as this routine gets updated each time a * new ipv6 socket option gets added. * * Any failures at compile time indicates duplicated ipv6 socket option * values. */ static __attribute__((unused)) void ipv6sockopt_cassert(void) { /* * This is equivalent to static_assert() and the compiler wouldn't * generate any instructions, thus for compile time only. */ switch ((int)0) { case 0: /* bsd/netinet6/in6.h */ case IPV6_SOCKOPT_RESERVED1: case IPV6_UNICAST_HOPS: case IPV6_MULTICAST_IF: case IPV6_MULTICAST_HOPS: case IPV6_MULTICAST_LOOP: case IPV6_JOIN_GROUP: case IPV6_LEAVE_GROUP: case IPV6_PORTRANGE: case ICMP6_FILTER: case IPV6_2292PKTINFO: case IPV6_2292HOPLIMIT: case IPV6_2292NEXTHOP: case IPV6_2292HOPOPTS: case IPV6_2292DSTOPTS: case IPV6_2292RTHDR: case IPV6_2292PKTOPTIONS: #ifdef __APPLE_USE_RFC_2292 // #define IPV6_PKTINFO IPV6_3542PKTINFO // #define IPV6_HOPLIMIT IPV6_3542HOPLIMIT // #define IPV6_NEXTHOP IPV6_3542NEXTHOP // #define IPV6_HOPOPTS IPV6_3542HOPOPTS // #define IPV6_DSTOPTS IPV6_3542DSTOPTS // #define IPV6_RTHDR IPV6_3542RTHDR case IPV6_PKTOPTIONS: #endif /* __APPLE_USE_RFC_2292 */ case IPV6_CHECKSUM: case IPV6_V6ONLY: #ifndef KERNEL // #define IPV6_BINDV6ONLY IPV6_V6ONLY #endif /* KERNEL */ case IPV6_IPSEC_POLICY: case IPV6_FAITH: case IPV6_FW_ADD: case IPV6_FW_DEL: case IPV6_FW_FLUSH: case IPV6_FW_ZERO: case IPV6_FW_GET: case IPV6_RECVTCLASS: case IPV6_TCLASS: #ifdef __APPLE_USE_RFC_3542 case IPV6_RTHDRDSTOPTS: case IPV6_RECVPKTINFO: case IPV6_RECVHOPLIMIT: case IPV6_RECVRTHDR: case IPV6_RECVHOPOPTS: case IPV6_RECVDSTOPTS: #ifdef KERNEL case IPV6_RECVRTHDRDSTOPTS: #endif case IPV6_USE_MIN_MTU: case IPV6_RECVPATHMTU: case IPV6_PATHMTU: case IPV6_3542PKTINFO: case IPV6_3542HOPLIMIT: case IPV6_3542NEXTHOP: case IPV6_3542HOPOPTS: case IPV6_3542DSTOPTS: case IPV6_3542RTHDR: // #define IPV6_PKTINFO IPV6_3542PKTINFO // #define IPV6_HOPLIMIT IPV6_3542HOPLIMIT // #define IPV6_NEXTHOP IPV6_3542NEXTHOP // #define IPV6_HOPOPTS IPV6_3542HOPOPTS // #define IPV6_DSTOPTS IPV6_3542DSTOPTS // #define IPV6_RTHDR IPV6_3542RTHDR case IPV6_AUTOFLOWLABEL: case IPV6_DONTFRAG: case IPV6_PREFER_TEMPADDR: case IPV6_MSFILTER: #endif /* __APPLE_USE_RFC_3542 */ case IPV6_BOUND_IF: /* bsd/netinet6/in6_private.h */ case IPV6_NO_IFT_CELLULAR: case IPV6_OUT_IF: case IPV6_RECV_LINK_ADDR_TYPE: ; } } |