X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/b7266188b87f3620ec3f9f717e57194a7dd989fe..bb59bff194111743b33cc36712410b5656329d3c:/bsd/netinet6/in6_ifattach.c diff --git a/bsd/netinet6/in6_ifattach.c b/bsd/netinet6/in6_ifattach.c index 5995b212d..e2a232a90 100644 --- a/bsd/netinet6/in6_ifattach.c +++ b/bsd/netinet6/in6_ifattach.c @@ -1,8 +1,8 @@ /* - * Copyright (c) 2003-2008 Apple Inc. All rights reserved. + * Copyright (c) 2003-2014 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 @@ -11,10 +11,10 @@ * 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, @@ -22,11 +22,9 @@ * 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@ */ -/* $FreeBSD: src/sys/netinet6/in6_ifattach.c,v 1.8 2002/04/19 04:46:22 suz Exp $ */ -/* $KAME: in6_ifattach.c,v 1.118 2001/05/24 07:44:00 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. @@ -65,9 +63,9 @@ #include #include #include -#include +#include #include -#include +#include #include #include @@ -79,6 +77,7 @@ #include #include #include +#include #include #include @@ -90,14 +89,10 @@ #include #include +#include -struct in6_ifstat **in6_ifstat = NULL; -struct icmp6_ifstat **icmp6_ifstat = NULL; -size_t in6_ifstatmax = 0; -size_t icmp6_ifstatmax = 0; u_int32_t in6_maxmtu = 0; extern lck_mtx_t *nd6_mutex; -extern lck_mtx_t *inet6_domain_mutex; #if IP6_AUTO_LINKLOCAL int ip6_auto_linklocal = IP6_AUTO_LINKLOCAL; @@ -107,87 +102,76 @@ int ip6_auto_linklocal = 1; /* enable by default */ extern struct inpcbinfo udbinfo; extern struct inpcbinfo ripcbinfo; -extern lck_mtx_t *ip6_mutex; -static int get_rand_ifid(struct ifnet *, struct in6_addr *); -static int generate_tmp_ifid(u_int8_t *, const u_int8_t *, u_int8_t *); -static int get_hw_ifid(struct ifnet *, struct in6_addr *); -static int get_ifid(struct ifnet *, struct ifnet *, struct in6_addr *); -static int in6_ifattach_linklocal(struct ifnet *, struct ifnet *, struct in6_aliasreq *); -static int in6_ifattach_loopback(struct ifnet *); - -#define EUI64_GBIT 0x01 -#define EUI64_UBIT 0x02 -#define EUI64_TO_IFID(in6) do {(in6)->s6_addr[8] ^= EUI64_UBIT; } while (0) -#define EUI64_GROUP(in6) ((in6)->s6_addr[8] & EUI64_GBIT) -#define EUI64_INDIVIDUAL(in6) (!EUI64_GROUP(in6)) -#define EUI64_LOCAL(in6) ((in6)->s6_addr[8] & EUI64_UBIT) -#define EUI64_UNIVERSAL(in6) (!EUI64_LOCAL(in6)) +static const unsigned int in6_extra_size = sizeof(struct in6_ifextra); +static const unsigned int in6_extra_bufsize = in6_extra_size + + sizeof(void *) + sizeof(uint64_t); -#define IFID_LOCAL(in6) (!EUI64_LOCAL(in6)) -#define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6)) +static int get_rand_iid(struct ifnet *, struct in6_addr *); +static int in6_generate_tmp_iid(u_int8_t *, const u_int8_t *, u_int8_t *); +static int in6_select_iid_from_all_hw(struct ifnet *, struct ifnet *, + struct in6_addr *); +static int in6_ifattach_linklocal(struct ifnet *, struct in6_aliasreq *); +static int in6_ifattach_loopback(struct ifnet *); /* * Generate a last-resort interface identifier, when the machine has no * IEEE802/EUI64 address sources. * The goal here is to get an interface identifier that is * (1) random enough and (2) does not change across reboot. - * We currently use MD5(hostname) for it. + * We currently use SHA1(hostname) for it. + * + * in6 - upper 64bits are preserved */ static int -get_rand_ifid( +get_rand_iid( __unused struct ifnet *ifp, struct in6_addr *in6) /* upper 64bits are preserved */ { - MD5_CTX ctxt; - u_int8_t digest[16]; - int len = strlen(hostname); - -#if 0 - /* we need at least several letters as seed for ifid */ - if (len < 3) - return -1; -#endif + SHA1_CTX ctxt; + u_int8_t digest[SHA1_RESULTLEN]; + int hostnlen = strlen(hostname); /* generate 8 bytes of pseudo-random value. */ - bzero(&ctxt, sizeof(ctxt)); - MD5Init(&ctxt); - MD5Update(&ctxt, hostname, len); - MD5Final(digest, &ctxt); + bzero(&ctxt, sizeof (ctxt)); + SHA1Init(&ctxt); + SHA1Update(&ctxt, hostname, hostnlen); + SHA1Final(digest, &ctxt); - /* assumes sizeof(digest) > sizeof(ifid) */ + /* assumes sizeof (digest) > sizeof (iid) */ bcopy(digest, &in6->s6_addr[8], 8); /* make sure to set "u" bit to local, and "g" bit to individual. */ - in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */ - in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */ + in6->s6_addr[8] &= ~ND6_EUI64_GBIT; /* g bit to "individual" */ + in6->s6_addr[8] |= ND6_EUI64_UBIT; /* u bit to "local" */ /* convert EUI64 into IPv6 interface identifier */ - EUI64_TO_IFID(in6); + ND6_EUI64_TO_IFID(in6); - return 0; + return (0); } static int -generate_tmp_ifid( +in6_generate_tmp_iid( u_int8_t *seed0, const u_int8_t *seed1, u_int8_t *ret) { - MD5_CTX ctxt; - u_int8_t seed[16], digest[16], nullbuf[8]; + SHA1_CTX ctxt; + u_int8_t seed[16], nullbuf[8], digest[SHA1_RESULTLEN]; u_int32_t val32; struct timeval tv; - /* If there's no hisotry, start with a random seed. */ - bzero(nullbuf, sizeof(nullbuf)); - if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) { + /* If there's no history, start with a random seed. */ + bzero(nullbuf, sizeof (nullbuf)); + if (bcmp(nullbuf, seed0, sizeof (nullbuf)) == 0) { int i; for (i = 0; i < 2; i++) { - microtime(&tv); - val32 = random() ^ tv.tv_usec; - bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32)); + getmicrotime(&tv); + val32 = RandomULong() ^ tv.tv_usec; + bcopy(&val32, seed + sizeof (val32) * i, + sizeof (val32)); } } else { bcopy(seed0, seed, 8); @@ -197,52 +181,52 @@ generate_tmp_ifid( /* XXX assumption on the size of IFID */ bcopy(seed1, &seed[8], 8); - if (0) { /* for debugging purposes only */ + if ((0)) { /* for debugging purposes only */ int i; - printf("generate_tmp_ifid: new randomized ID from: "); + printf("%s: new randomized ID from: ", __func__); for (i = 0; i < 16; i++) printf("%02x", seed[i]); printf(" "); } /* generate 16 bytes of pseudo-random value. */ - bzero(&ctxt, sizeof(ctxt)); - MD5Init(&ctxt); - MD5Update(&ctxt, seed, sizeof(seed)); - MD5Final(digest, &ctxt); + bzero(&ctxt, sizeof (ctxt)); + SHA1Init(&ctxt); + SHA1Update(&ctxt, seed, sizeof (seed)); + SHA1Final(digest, &ctxt); /* - * RFC 3041 3.2.1. (3) - * Take the left-most 64-bits of the MD5 digest and set bit 6 (the + * RFC 4941 3.2.1. (3) + * Take the left-most 64-bits of the SHA1 digest and set bit 6 (the * left-most bit is numbered 0) to zero. */ bcopy(digest, ret, 8); - ret[0] &= ~EUI64_UBIT; + ret[0] &= ~ND6_EUI64_UBIT; /* * XXX: we'd like to ensure that the generated value is not zero * for simplicity. If the caclculated digest happens to be zero, * use a random non-zero value as the last resort. */ - if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) { - log(LOG_INFO, - "generate_tmp_ifid: computed MD5 value is zero.\n"); + if (bcmp(nullbuf, ret, sizeof (nullbuf)) == 0) { + nd6log((LOG_INFO, + "%s: computed SHA1 value is zero.\n", __func__)); - microtime(&tv); + getmicrotime(&tv); val32 = random() ^ tv.tv_usec; val32 = 1 + (val32 % (0xffffffff - 1)); } /* - * RFC 3041 3.2.1. (4) - * Take the rightmost 64-bits of the MD5 digest and save them in + * RFC 4941 3.2.1. (4) + * Take the next 64-bits of the SHA1 digest and save them in * stable storage as the history value to be used in the next - * iteration of the algorithm. + * iteration of the algorithm. */ bcopy(&digest[8], seed0, 8); - if (0) { /* for debugging purposes only */ + if ((0)) { /* for debugging purposes only */ int i; printf("to: "); @@ -251,48 +235,41 @@ generate_tmp_ifid( printf("\n"); } - return 0; + return (0); } /* - * Get interface identifier for the specified interface. + * Get interface identifier for the specified interface using the method in + * Appendix A of RFC 4291. + * * XXX assumes single sockaddr_dl (AF_LINK address) per an interface + * + * in6 - upper 64bits are preserved */ -static int -get_hw_ifid( - struct ifnet *ifp, - struct in6_addr *in6) /* upper 64bits are preserved */ +int +in6_iid_from_hw(struct ifnet *ifp, struct in6_addr *in6) { - struct ifaddr *ifa; + struct ifaddr *ifa = NULL; struct sockaddr_dl *sdl; u_int8_t *addr; size_t addrlen; static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; static u_int8_t allone[8] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + int err = -1; /* Why doesn't this code use ifnet_addrs? */ ifnet_lock_shared(ifp); - for (ifa = ifp->if_addrlist.tqh_first; - ifa; - ifa = ifa->ifa_list.tqe_next) - { - if (ifa->ifa_addr->sa_family != AF_LINK) - continue; - sdl = (struct sockaddr_dl *)ifa->ifa_addr; - if (sdl == NULL) - continue; - if (sdl->sdl_alen == 0) - continue; - - goto found; + ifa = ifp->if_lladdr; + sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; + if (sdl->sdl_alen == 0) { + ifnet_lock_done(ifp); + return (-1); } + IFA_ADDREF(ifa); /* for this routine */ ifnet_lock_done(ifp); - return -1; - -found: - ifnet_lock_done(ifp); + IFA_LOCK(ifa); addr = (u_int8_t *) LLADDR(sdl); addrlen = sdl->sdl_alen; @@ -300,6 +277,7 @@ found: switch (ifp->if_type) { case IFT_ETHER: case IFT_FDDI: + case IFT_ISO88025: case IFT_ATM: case IFT_IEEE1394: case IFT_L2VLAN: @@ -315,7 +293,7 @@ found: /* look at IEEE802/EUI64 only */ if (addrlen != 8 && addrlen != 6) - return -1; + goto done; /* * check for invalid MAC address - on bsdi, we see it a lot @@ -323,9 +301,9 @@ found: * card insertion. */ if (bcmp(addr, allzero, addrlen) == 0) - return -1; + goto done; if (bcmp(addr, allone, addrlen) == 0) - return -1; + goto done; /* make EUI64 address */ if (addrlen == 8) @@ -344,9 +322,9 @@ found: case IFT_ARCNET: if (addrlen != 1) - return -1; + goto done; if (!addr[0]) - return -1; + goto done; bzero(&in6->s6_addr[8], 8); in6->s6_addr[15] = addr[0]; @@ -354,8 +332,8 @@ found: /* * due to insufficient bitwidth, we mark it local. */ - in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */ - in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */ + in6->s6_addr[8] &= ~ND6_EUI64_GBIT; /* g to "individual" */ + in6->s6_addr[8] |= ND6_EUI64_UBIT; /* u to "local" */ break; case IFT_GIF: @@ -363,43 +341,59 @@ found: case IFT_STF: #endif /* - * RFC2893 says: "SHOULD use IPv4 address as ifid source". + * RFC2893 says: "SHOULD use IPv4 address as IID source". * however, IPv4 address is not very suitable as unique * identifier source (can be renumbered). * we don't do this. */ - return -1; + goto done; + + case IFT_CELLULAR: + goto done; default: - return -1; + goto done; } /* sanity check: g bit must not indicate "group" */ - if (EUI64_GROUP(in6)) - return -1; + if (ND6_EUI64_GROUP(in6)) + goto done; /* convert EUI64 into IPv6 interface identifier */ - EUI64_TO_IFID(in6); + ND6_EUI64_TO_IFID(in6); /* - * sanity check: ifid must not be all zero, avoid conflict with + * sanity check: iid must not be all zero, avoid conflict with * subnet router anycast */ - if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 && + if ((in6->s6_addr[8] & ~(ND6_EUI64_GBIT | ND6_EUI64_UBIT)) == 0x00 && bcmp(&in6->s6_addr[9], allzero, 7) == 0) { - return -1; + goto done; } - return 0; + err = 0; /* found */ + +done: + /* This must not be the last reference to the lladdr */ + if (IFA_REMREF_LOCKED(ifa) == NULL) { + panic("%s: unexpected (missing) refcnt ifa=%p", __func__, ifa); + /* NOTREACHED */ + } + IFA_UNLOCK(ifa); + return (err); } /* - * Get interface identifier for the specified interface. If it is not - * available on ifp0, borrow interface identifier from other information - * sources. + * Get interface identifier for the specified interface using the method in + * Appendix A of RFC 4291. If it is not available on ifp0, borrow interface + * identifier from other information sources. + * + * ifp - primary EUI64 source + * altifp - secondary EUI64 source + * in6 - IPv6 address to output IID */ static int -get_ifid( +in6_select_iid_from_all_hw( struct ifnet *ifp0, struct ifnet *altifp, /* secondary EUI64 source */ struct in6_addr *in6) @@ -407,15 +401,15 @@ get_ifid( struct ifnet *ifp; /* first, try to get it from the interface itself */ - if (get_hw_ifid(ifp0, in6) == 0) { - nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n", + if (in6_iid_from_hw(ifp0, in6) == 0) { + nd6log((LOG_DEBUG, "%s: IID derived from HW interface.\n", if_name(ifp0))); goto success; } /* try secondary EUI64 source. this basically is for ATM PVC */ - if (altifp && get_hw_ifid(altifp, in6) == 0) { - nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n", + if (altifp && in6_iid_from_hw(altifp, in6) == 0) { + nd6log((LOG_DEBUG, "%s: IID from alterate HW interface %s.\n", if_name(ifp0), if_name(altifp))); goto success; } @@ -425,16 +419,15 @@ get_ifid( TAILQ_FOREACH(ifp, &ifnet_head, if_list) { if (ifp == ifp0) continue; - if (get_hw_ifid(ifp, in6) != 0) + if (in6_iid_from_hw(ifp, in6) != 0) continue; /* - * to borrow ifid from other interface, ifid needs to be + * to borrow IID from other interface, IID needs to be * globally unique */ - if (IFID_UNIVERSAL(in6)) { - nd6log((LOG_DEBUG, - "%s: borrow interface identifier from %s\n", + if (ND6_IFID_UNIVERSAL(in6)) { + nd6log((LOG_DEBUG, "%s: borrowed IID from %s\n", if_name(ifp0), if_name(ifp))); ifnet_head_done(); goto success; @@ -443,148 +436,67 @@ get_ifid( ifnet_head_done(); /* last resort: get from random number source */ - if (get_rand_ifid(ifp, in6) == 0) { - nd6log((LOG_DEBUG, - "%s: interface identifier generated by random number\n", - if_name(ifp0))); + if (get_rand_iid(ifp, in6) == 0) { + nd6log((LOG_DEBUG, "%s: IID from PRNG.\n", if_name(ifp0))); goto success; } printf("%s: failed to get interface identifier\n", if_name(ifp0)); - return -1; + return (-1); success: - nd6log((LOG_INFO, "%s: ifid: " + nd6log((LOG_INFO, "%s: IID: " "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", if_name(ifp0), in6->s6_addr[8], in6->s6_addr[9], in6->s6_addr[10], in6->s6_addr[11], in6->s6_addr[12], in6->s6_addr[13], in6->s6_addr[14], in6->s6_addr[15])); - return 0; + return (0); } static int -in6_ifattach_linklocal( - struct ifnet *ifp, - struct ifnet *altifp, /* secondary EUI64 source */ - struct in6_aliasreq *ifra_passed) +in6_ifattach_linklocal(struct ifnet *ifp, struct in6_aliasreq *ifra) { struct in6_ifaddr *ia; - struct in6_aliasreq ifra; struct nd_prefix pr0, *pr; int i, error; - /* - * configure link-local address. - */ - bzero(&ifra, sizeof(ifra)); + VERIFY(ifra != NULL); proto_plumb(PF_INET6, ifp); - /* - * in6_update_ifa() does not use ifra_name, but we accurately set it - * for safety. - */ - strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name)); - - if (((ifp->if_type == IFT_PPP) || ((ifp->if_eflags & IFEF_NOAUTOIPV6LL) != 0)) && - ifra_passed != NULL) /* PPP provided both addresses for us */ - bcopy(&ifra_passed->ifra_addr, &(ifra.ifra_addr), sizeof(struct sockaddr_in6)); - else { - ifra.ifra_addr.sin6_family = AF_INET6; - ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6); - ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80); -#if SCOPEDROUTING - ifra.ifra_addr.sin6_addr.s6_addr16[1] = 0 -#else - ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); /* XXX */ -#endif - ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0; - if ((ifp->if_flags & IFF_LOOPBACK) != 0) { - ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0; - ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1); - } else { - if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) { - nd6log((LOG_ERR, - " %s: no ifid available\n", if_name(ifp))); - return -1; - } - } -#if SCOPEDROUTING - ifra.ifra_addr.sin6_scope_id = - in6_addr2scopeid(ifp, &ifra.ifra_addr.sin6_addr); -#endif - } - ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); - ifra.ifra_prefixmask.sin6_family = AF_INET6; - ifra.ifra_prefixmask.sin6_addr = in6mask64; -#if SCOPEDROUTING - /* take into accound the sin6_scope_id field for routing */ - ifra.ifra_prefixmask.sin6_scope_id = 0xffffffff; -#endif - /* link-local addresses should NEVER expire. */ - ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; - ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; - - /* - * Do not let in6_update_ifa() do DAD, since we need a random delay - * before sending an NS at the first time the interface becomes up. - * Instead, in6_if_up() will start DAD with a proper random delay. - */ - ifra.ifra_flags |= IN6_IFF_NODAD; - - /* - * Now call in6_update_ifa() to do a bunch of procedures to configure - * a link-local address. We can set NULL to the 3rd argument, because - * we know there's no other link-local address on the interface - * and therefore we are adding one (instead of updating one). - */ - if ((error = in6_update_ifa(ifp, &ifra, NULL, M_WAITOK)) != 0) { + error = in6_update_ifa(ifp, ifra, IN6_IFAUPDATE_DADDELAY, &ia); + if (error != 0) { /* * XXX: When the interface does not support IPv6, this call * would fail in the SIOCSIFADDR ioctl. I believe the * notification is rather confusing in this case, so just - * supress it. (jinmei@kame.net 20010130) + * suppress it. (jinmei@kame.net 20010130) */ if (error != EAFNOSUPPORT) - log(LOG_NOTICE, "in6_ifattach_linklocal: failed to " + nd6log((LOG_NOTICE, "%s: failed to " "configure a link-local address on %s " "(errno=%d)\n", - if_name(ifp), error); - return(-1); - } - - /* - * Adjust ia6_flags so that in6_if_up will perform DAD. - * XXX: Some P2P interfaces seem not to send packets just after - * becoming up, so we skip p2p interfaces for safety. - */ - ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */ -#if DIAGNOSTIC - if (!ia) { - panic("ia == NULL in in6_ifattach_linklocal"); - /*NOTREACHED*/ - } -#endif - if (in6if_do_dad(ifp) && (ifp->if_flags & IFF_POINTOPOINT) == 0) { - ia->ia6_flags &= ~IN6_IFF_NODAD; - ia->ia6_flags |= IN6_IFF_TENTATIVE; + __func__, if_name(ifp), error)); + return (EADDRNOTAVAIL); } + VERIFY(ia != NULL); /* - * Make the link-local prefix (fe80::/64%link) as on-link. + * Make the link-local prefix (fe80::%link/64) as on-link. * Since we'd like to manage prefixes separately from addresses, * we make an ND6 prefix structure for the link-local prefix, * and add it to the prefix list as a never-expire prefix. * XXX: this change might affect some existing code base... */ - bzero(&pr0, sizeof(pr0)); + bzero(&pr0, sizeof (pr0)); + lck_mtx_init(&pr0.ndpr_lock, ifa_mtx_grp, ifa_mtx_attr); pr0.ndpr_ifp = ifp; /* this should be 64 at this moment. */ - pr0.ndpr_plen = in6_mask2len(&ifra.ifra_prefixmask.sin6_addr, NULL); - pr0.ndpr_mask = ifra.ifra_prefixmask.sin6_addr; - pr0.ndpr_prefix = ifra.ifra_addr; + pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, NULL); + pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr; + pr0.ndpr_prefix = ifra->ifra_addr; /* apply the mask for safety. (nd6_prelist_add will apply it again) */ for (i = 0; i < 4; i++) { pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= @@ -598,6 +510,7 @@ in6_ifattach_linklocal( pr0.ndpr_raf_auto = 1; /* probably meaningless */ pr0.ndpr_vltime = ND6_INFINITE_LIFETIME; pr0.ndpr_pltime = ND6_INFINITE_LIFETIME; + pr0.ndpr_stateflags |= NDPRF_STATIC; /* * Since there is no other link-local addresses, nd6_prefix_lookup() * probably returns NULL. However, we cannot always expect the result. @@ -606,23 +519,22 @@ in6_ifattach_linklocal( * valid with referring to the old link-local address. */ if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { - if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { - printf("in6_ifattach_linklocal: nd6_prelist_add failed %d\n", error); - ifafree(&ia->ia_ifa); - return(error); + if ((error = nd6_prelist_add(&pr0, NULL, &pr, TRUE)) != 0) { + IFA_REMREF(&ia->ia_ifa); + lck_mtx_destroy(&pr0.ndpr_lock, ifa_mtx_grp); + return (error); } } - if (ia != NULL) { - in6_post_msg(ifp, KEV_INET6_NEW_LL_ADDR, ia); - ifafree(&ia->ia_ifa); - } + in6_post_msg(ifp, KEV_INET6_NEW_LL_ADDR, ia, NULL); + IFA_REMREF(&ia->ia_ifa); /* Drop use count held above during lookup/add */ if (pr != NULL) - ndpr_rele(pr, FALSE); + NDPR_REMREF(pr); - return 0; + lck_mtx_destroy(&pr0.ndpr_lock, ifa_mtx_grp); + return (0); } static int @@ -630,17 +542,18 @@ in6_ifattach_loopback( struct ifnet *ifp) /* must be IFT_LOOP */ { struct in6_aliasreq ifra; + struct in6_ifaddr *ia; int error; - bzero(&ifra, sizeof(ifra)); + bzero(&ifra, sizeof (ifra)); /* * in6_update_ifa() does not use ifra_name, but we accurately set it * for safety. */ - strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name)); + strlcpy(ifra.ifra_name, if_name(ifp), sizeof (ifra.ifra_name)); - ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); + ifra.ifra_prefixmask.sin6_len = sizeof (struct sockaddr_in6); ifra.ifra_prefixmask.sin6_family = AF_INET6; ifra.ifra_prefixmask.sin6_addr = in6mask128; @@ -648,11 +561,11 @@ in6_ifattach_loopback( * Always initialize ia_dstaddr (= broadcast address) to loopback * address. Follows IPv4 practice - see in_ifinit(). */ - ifra.ifra_dstaddr.sin6_len = sizeof(struct sockaddr_in6); + ifra.ifra_dstaddr.sin6_len = sizeof (struct sockaddr_in6); ifra.ifra_dstaddr.sin6_family = AF_INET6; ifra.ifra_dstaddr.sin6_addr = in6addr_loopback; - ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6); + ifra.ifra_addr.sin6_len = sizeof (struct sockaddr_in6); ifra.ifra_addr.sin6_family = AF_INET6; ifra.ifra_addr.sin6_addr = in6addr_loopback; @@ -663,26 +576,24 @@ in6_ifattach_loopback( /* we don't need to perform DAD on loopback interfaces. */ ifra.ifra_flags |= IN6_IFF_NODAD; - /* skip registration to the prefix list. XXX should be temporary. */ - ifra.ifra_flags |= IN6_IFF_NOPFX; - - /* - * We are sure that this is a newly assigned address, so we can set - * NULL to the 3rd arg. - */ - if ((error = in6_update_ifa(ifp, &ifra, NULL, M_WAITOK)) != 0) { - log(LOG_ERR, "in6_ifattach_loopback: failed to configure " - "the loopback address on %s (errno=%d)\n", - if_name(ifp), error); - return(-1); + /* add the new interface address */ + error = in6_update_ifa(ifp, &ifra, 0, &ia); + if (error != 0) { + nd6log((LOG_ERR, + "%s: failed to configure loopback address %s (error=%d)\n", + __func__, if_name(ifp), error)); + VERIFY(ia == NULL); + return (EADDRNOTAVAIL); } - return 0; + VERIFY(ia != NULL); + IFA_REMREF(&ia->ia_ifa); + return (0); } /* * compute NI group address, based on the current hostname setting. - * see draft-ietf-ipngwg-icmp-name-lookup-* (04 and later). + * see RFC 4620. * * when ifp == NULL, the caller is responsible for filling scopeid. */ @@ -695,211 +606,89 @@ in6_nigroup( { const char *p; u_char *q; - MD5_CTX ctxt; - u_int8_t digest[16]; + SHA1_CTX ctxt; + u_int8_t digest[SHA1_RESULTLEN]; char l; char n[64]; /* a single label must not exceed 63 chars */ if (!namelen || !name) - return -1; + return (-1); p = name; while (p && *p && *p != '.' && p - name < namelen) p++; - if (p - name > sizeof(n) - 1) - return -1; /* label too long */ + if (p - name > sizeof (n) - 1) + return (-1); /* label too long */ l = p - name; - strncpy(n, name, l); + strlcpy(n, name, l); n[(int)l] = '\0'; for (q = (u_char *) n; *q; q++) { if ('A' <= *q && *q <= 'Z') *q = *q - 'A' + 'a'; } - /* generate 8 bytes of pseudo-random value. */ - bzero(&ctxt, sizeof(ctxt)); - MD5Init(&ctxt); - MD5Update(&ctxt, &l, sizeof(l)); - MD5Update(&ctxt, n, l); - MD5Final(digest, &ctxt); - - bzero(in6, sizeof(*in6)); - in6->s6_addr16[0] = htons(0xff02); - if (ifp) - in6->s6_addr16[1] = htons(ifp->if_index); + /* generate 16 bytes of pseudo-random value. */ + bzero(&ctxt, sizeof (ctxt)); + SHA1Init(&ctxt); + SHA1Update(&ctxt, &l, sizeof (l)); + SHA1Update(&ctxt, n, l); + SHA1Final(digest, &ctxt); + + bzero(in6, sizeof (*in6)); + in6->s6_addr16[0] = IPV6_ADDR_INT16_MLL; in6->s6_addr8[11] = 2; - bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3])); + in6->s6_addr8[12] = 0xff; + /* copy first 3 bytes of prefix into address */ + bcopy(digest, &in6->s6_addr8[13], 3); + if (in6_setscope(in6, ifp, NULL)) + return (-1); /* XXX: should not fail */ - return 0; + return (0); } -void -in6_nigroup_attach( - const char *name, - int namelen) +int +in6_domifattach(struct ifnet *ifp) { - struct ifnet *ifp; - struct sockaddr_in6 mltaddr; - struct in6_multi *in6m; int error; - bzero(&mltaddr, sizeof(mltaddr)); - mltaddr.sin6_family = AF_INET6; - mltaddr.sin6_len = sizeof(struct sockaddr_in6); - if (in6_nigroup(NULL, name, namelen, &mltaddr.sin6_addr) != 0) - return; + VERIFY(ifp != NULL); - ifnet_head_lock_shared(); - TAILQ_FOREACH(ifp, &ifnet_head, if_list) { - mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); - ifnet_lock_shared(ifp); - IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); - ifnet_lock_done(ifp); - if (!in6m) { - if (!in6_addmulti(&mltaddr.sin6_addr, ifp, &error, 0)) { - nd6log((LOG_ERR, "%s: failed to join %s " - "(errno=%d)\n", if_name(ifp), - ip6_sprintf(&mltaddr.sin6_addr), - error)); - } + error = proto_plumb(PF_INET6, ifp); + if (error != 0) { + if (error != EEXIST) + log(LOG_ERR, "%s: proto_plumb returned %d if=%s\n", + __func__, error, if_name(ifp)); + } else { + error = in6_ifattach_prelim(ifp); + if (error != 0) { + int errorx; + + log(LOG_ERR, + "%s: in6_ifattach_prelim returned %d if=%s%d\n", + __func__, error, ifp->if_name, ifp->if_unit); + + errorx = proto_unplumb(PF_INET6, ifp); + if (errorx != 0) /* XXX should not fail */ + log(LOG_ERR, + "%s: proto_unplumb returned %d if=%s%d\n", + __func__, errorx, ifp->if_name, + ifp->if_unit); } } - ifnet_head_done(); -} - -void -in6_nigroup_detach( - const char *name, - int namelen) -{ - struct ifnet *ifp; - struct sockaddr_in6 mltaddr; - struct in6_multi *in6m; - bzero(&mltaddr, sizeof(mltaddr)); - mltaddr.sin6_family = AF_INET6; - mltaddr.sin6_len = sizeof(struct sockaddr_in6); - if (in6_nigroup(NULL, name, namelen, &mltaddr.sin6_addr) != 0) - return; - - ifnet_head_lock_shared(); - TAILQ_FOREACH(ifp, &ifnet_head, if_list) { - mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); - ifnet_lock_shared(ifp); - IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); - ifnet_lock_done(ifp); - if (in6m) - in6_delmulti(in6m, 0); - } - ifnet_head_done(); + return (error); } -/* - * XXX multiple loopback interface needs more care. for instance, - * nodelocal address needs to be configured onto only one of them. - * XXX multiple link-local address case - */ int -in6_ifattach( - struct ifnet *ifp, - struct ifnet *altifp, /* secondary EUI64 source */ - struct in6_aliasreq *ifra) +in6_ifattach_prelim(struct ifnet *ifp) { - static size_t if_indexlim = 8; - struct in6_ifaddr *ia; - int error; - - /* - * We have some arrays that should be indexed by if_index. - * since if_index will grow dynamically, they should grow too. - * struct in6_ifstat **in6_ifstat - * struct icmp6_ifstat **icmp6_ifstat - */ - if (in6_ifstat == NULL || icmp6_ifstat == NULL || - if_index >= if_indexlim) { - while (if_index >= if_indexlim) - if_indexlim <<= 1; - } - - lck_mtx_lock(ip6_mutex); - /* grow in6_ifstat */ - if (in6_ifstatmax < if_indexlim) { - size_t n; - caddr_t q; - - n = if_indexlim * sizeof(struct in6_ifstat *); - q = (caddr_t)_MALLOC(n, M_IFADDR, M_WAITOK); - if (q == NULL) { - lck_mtx_unlock(ip6_mutex); - return ENOBUFS; - } - bzero(q, n); - if (in6_ifstat) { - bcopy((caddr_t)in6_ifstat, q, - in6_ifstatmax * sizeof(struct in6_ifstat *)); - FREE((caddr_t)in6_ifstat, M_IFADDR); - } - in6_ifstat = (struct in6_ifstat **)q; - in6_ifstatmax = if_indexlim; - } - - if (in6_ifstat[ifp->if_index] == NULL) { - in6_ifstat[ifp->if_index] = (struct in6_ifstat *) - _MALLOC(sizeof(struct in6_ifstat), M_IFADDR, M_WAITOK); - if (in6_ifstat[ifp->if_index] == NULL) { - lck_mtx_unlock(ip6_mutex); - return ENOBUFS; - } - bzero(in6_ifstat[ifp->if_index], sizeof(struct in6_ifstat)); - } - lck_mtx_unlock(ip6_mutex); - - /* grow icmp6_ifstat, use inet6_domain_mutex as that is used in - * icmp6 routines - */ - lck_mtx_lock(inet6_domain_mutex); - if (icmp6_ifstatmax < if_indexlim) { - size_t n; - caddr_t q; - - n = if_indexlim * sizeof(struct icmp6_ifstat *); - q = (caddr_t)_MALLOC(n, M_IFADDR, M_WAITOK); - if (q == NULL) { - lck_mtx_unlock(inet6_domain_mutex); - return ENOBUFS; - } - bzero(q, n); - if (icmp6_ifstat) { - bcopy((caddr_t)icmp6_ifstat, q, - icmp6_ifstatmax * sizeof(struct icmp6_ifstat *)); - FREE((caddr_t)icmp6_ifstat, M_IFADDR); - } - icmp6_ifstat = (struct icmp6_ifstat **)q; - icmp6_ifstatmax = if_indexlim; - } - - if (icmp6_ifstat[ifp->if_index] == NULL) { - icmp6_ifstat[ifp->if_index] = (struct icmp6_ifstat *) - _MALLOC(sizeof(struct icmp6_ifstat), M_IFADDR, M_WAITOK); - if (icmp6_ifstat[ifp->if_index] == NULL) { - lck_mtx_unlock(inet6_domain_mutex); - return ENOBUFS; - } - bzero(icmp6_ifstat[ifp->if_index], sizeof(struct icmp6_ifstat)); - } - lck_mtx_unlock(inet6_domain_mutex); - - /* initialize NDP variables */ - if ((error = nd6_ifattach(ifp)) != 0) - return error; + struct in6_ifextra *ext; + void **pbuf, *base; + int error = 0; - /* initialize scope identifiers */ - if ((error = scope6_ifattach(ifp)) != 0) - return error; + VERIFY(ifp != NULL); - /* - * quirks based on interface type - */ + /* quirks based on interface type */ switch (ifp->if_type) { #if IFT_STF case IFT_STF: @@ -909,143 +698,409 @@ in6_ifattach( * linklocals for 6to4 interface, but there's no use and * it is rather harmful to have one. */ - goto statinit; + goto skipmcast; #endif default: break; } /* - * usually, we require multicast capability to the interface + * IPv6 requires multicast capability at the interface. + * (previously, this was a silent error.) */ if ((ifp->if_flags & IFF_MULTICAST) == 0) { - log(LOG_INFO, "in6_ifattach: " + nd6log((LOG_INFO, "in6_ifattach: ", "%s is not multicast capable, IPv6 not enabled\n", - if_name(ifp)); - return EINVAL; + if_name(ifp))); + return (EINVAL); } - /* - * assign loopback address for loopback interface. - * XXX multiple loopback interface case. - */ +#if IFT_STF +skipmcast: +#endif + + if (ifp->if_inet6data == NULL) { + ext = (struct in6_ifextra *)_MALLOC(in6_extra_size, M_IFADDR, + M_WAITOK|M_ZERO); + if (!ext) + return (ENOMEM); + base = (void *)P2ROUNDUP((intptr_t)ext + sizeof(uint64_t), + sizeof(uint64_t)); + VERIFY(((intptr_t)base + in6_extra_size) <= + ((intptr_t)ext + in6_extra_bufsize)); + pbuf = (void **)((intptr_t)base - sizeof(void *)); + *pbuf = ext; + ifp->if_inet6data = base; + VERIFY(IS_P2ALIGNED(ifp->if_inet6data, sizeof(uint64_t))); + } else { + /* + * Since the structure is never freed, we need to zero out + * some of its members. We avoid zeroing out the scope6 + * structure on purpose because other threads might be + * using its contents. + */ + bzero(&IN6_IFEXTRA(ifp)->icmp6_ifstat, + sizeof(IN6_IFEXTRA(ifp)->icmp6_ifstat)); + bzero(&IN6_IFEXTRA(ifp)->in6_ifstat, + sizeof(IN6_IFEXTRA(ifp)->in6_ifstat)); + } + + /* initialize NDP variables */ + if ((error = nd6_ifattach(ifp)) != 0) + return (error); + + scope6_ifattach(ifp); + + /* initialize loopback interface address */ if ((ifp->if_flags & IFF_LOOPBACK) != 0) { - if (in6_ifattach_loopback(ifp) != 0) - printf("in6_ifattach: in6_ifattach_loopback failed\n"); + error = in6_ifattach_loopback(ifp); + if (error != 0) { + log(LOG_ERR, "%s: in6_ifattach_loopback returned %d\n", + __func__, error, ifp->if_name, + ifp->if_unit); + return (error); + } + } + + /* update dynamically. */ + if (in6_maxmtu < ifp->if_mtu) + in6_maxmtu = ifp->if_mtu; + + VERIFY(error == 0); + return (0); +} + +int +in6_ifattach_aliasreq(struct ifnet *ifp, struct ifnet *altifp, + struct in6_aliasreq *ifra0) +{ + int error; + struct in6_ifaddr *ia6; + struct in6_aliasreq ifra; + + error = in6_ifattach_prelim(ifp); + if (error != 0) + return (error); + + if (!ip6_auto_linklocal) + return (0); + + /* assign a link-local address, only if there isn't one here already. */ + ia6 = in6ifa_ifpforlinklocal(ifp, 0); + if (ia6 != NULL) { + IFA_REMREF(&ia6->ia_ifa); + return (0); } + bzero(&ifra, sizeof (ifra)); + /* - * assign a link-local address, if there's none. + * in6_update_ifa() does not use ifra_name, but we accurately set it + * for safety. */ - if (ip6_auto_linklocal) { - ia = in6ifa_ifpforlinklocal(ifp, 0); - if (ia == NULL) { - if (in6_ifattach_linklocal(ifp, altifp, ifra) == 0) { - /* linklocal address assigned */ - } else { - log(LOG_INFO, "in6_ifattach: %s failed to " - "attach a linklocal address.\n", - if_name(ifp)); - /* failed to assign linklocal address. bark? */ - } + strlcpy(ifra.ifra_name, if_name(ifp), sizeof (ifra.ifra_name)); + + /* Initialize the IPv6 interface address in our in6_aliasreq block */ + if ((ifp->if_eflags & IFEF_NOAUTOIPV6LL) != 0 && ifra0 != NULL) { + /* interface provided both addresses for us */ + struct sockaddr_in6 *sin6 = &ifra.ifra_addr; + struct in6_addr *in6 = &sin6->sin6_addr; + boolean_t ok = TRUE; + + bcopy(&ifra0->ifra_addr, sin6, sizeof (struct sockaddr_in6)); + + if (sin6->sin6_family != AF_INET6 || sin6->sin6_port != 0) + ok = FALSE; + if (ok && (in6->s6_addr16[0] != htons(0xfe80))) + ok = FALSE; + if (ok) { + if (sin6->sin6_scope_id == 0 && in6->s6_addr16[1] == 0) + in6->s6_addr16[1] = htons(ifp->if_index); + else if (sin6->sin6_scope_id != 0 && + sin6->sin6_scope_id != ifp->if_index) + ok = FALSE; + else if (in6->s6_addr16[1] != 0 && + ntohs(in6->s6_addr16[1]) != ifp->if_index) + ok = FALSE; + } + if (ok && (in6->s6_addr32[1] != 0)) + ok = FALSE; + if (!ok) + return (EINVAL); + } else { + ifra.ifra_addr.sin6_family = AF_INET6; + ifra.ifra_addr.sin6_len = sizeof (struct sockaddr_in6); + ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80); + ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); + ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0; + if ((ifp->if_flags & IFF_LOOPBACK) != 0) { + ifra.ifra_addr.sin6_addr.s6_addr32[2] = 0; + ifra.ifra_addr.sin6_addr.s6_addr32[3] = htonl(1); } else { - ifafree(&ia->ia_ifa); + if (in6_select_iid_from_all_hw(ifp, altifp, + &ifra.ifra_addr.sin6_addr) != 0) { + nd6log((LOG_ERR, "%s: no IID available\n", + if_name(ifp))); + return (EADDRNOTAVAIL); + } } } -#if IFT_STF /* XXX */ -statinit: -#endif + if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, NULL)) + return (EADDRNOTAVAIL); - /* update dynamically. */ - if (in6_maxmtu < ifp->if_mtu) - in6_maxmtu = ifp->if_mtu; + /* Set the prefix mask */ + ifra.ifra_prefixmask.sin6_len = sizeof (struct sockaddr_in6); + ifra.ifra_prefixmask.sin6_family = AF_INET6; + ifra.ifra_prefixmask.sin6_addr = in6mask64; + + /* link-local addresses should NEVER expire. */ + ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; + ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; + + /* Attach the link-local address */ + if (in6_ifattach_linklocal(ifp, &ifra) != 0) { + nd6log((LOG_INFO, + "%s: %s could not attach link-local address.\n", + __func__, if_name(ifp))); + /* NB: not an error */ + } + + return (0); +} + +int +in6_ifattach_llstartreq(struct ifnet *ifp, struct in6_llstartreq *llsr) +{ + struct in6_aliasreq ifra; + struct in6_ifaddr *ia6; + struct nd_ifinfo *ndi; + int error; + + VERIFY(llsr != NULL); + + error = in6_ifattach_prelim(ifp); + if (error != 0) + return (error); - return 0; + if (!ip6_auto_linklocal || (ifp->if_eflags & IFEF_NOAUTOIPV6LL) != 0) + return (0); + + if (nd6_send_opstate == ND6_SEND_OPMODE_DISABLED) + return (ENXIO); + + lck_rw_lock_shared(nd_if_rwlock); + ndi = ND_IFINFO(ifp); + VERIFY(ndi != NULL && ndi->initialized); + if ((ndi->flags & ND6_IFF_INSECURE) != 0) { + lck_rw_done(nd_if_rwlock); + return (ENXIO); + } + lck_rw_done(nd_if_rwlock); + + /* assign a link-local address, only if there isn't one here already. */ + ia6 = in6ifa_ifpforlinklocal(ifp, 0); + if (ia6 != NULL) { + IFA_REMREF(&ia6->ia_ifa); + return (0); + } + + bzero(&ifra, sizeof (ifra)); + strlcpy(ifra.ifra_name, if_name(ifp), sizeof (ifra.ifra_name)); + + ifra.ifra_addr.sin6_family = AF_INET6; + ifra.ifra_addr.sin6_len = sizeof (struct sockaddr_in6); + ifra.ifra_addr.sin6_addr.s6_addr16[0] = htons(0xfe80); + ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); + ifra.ifra_addr.sin6_addr.s6_addr32[1] = 0; + ifra.ifra_flags = IN6_IFF_SECURED; + + in6_cga_node_lock(); + if (in6_cga_generate(&llsr->llsr_cgaprep, 0, + &ifra.ifra_addr.sin6_addr)) { + in6_cga_node_unlock(); + return (EADDRNOTAVAIL); + } + in6_cga_node_unlock(); + + if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, NULL)) + return (EADDRNOTAVAIL); + + /* Set the prefix mask */ + ifra.ifra_prefixmask.sin6_len = sizeof (struct sockaddr_in6); + ifra.ifra_prefixmask.sin6_family = AF_INET6; + ifra.ifra_prefixmask.sin6_addr = in6mask64; + + /* + * link-local addresses should NEVER expire, but cryptographic + * ones may have finite preferred lifetime [if it's important to + * keep them from being used by applications as persistent device + * identifiers]. + */ + ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; + ifra.ifra_lifetime.ia6t_pltime = llsr->llsr_lifetime.ia6t_pltime; + + /* Attach the link-local address */ + if (in6_ifattach_linklocal(ifp, &ifra) != 0) { + /* NB: not an error */ + nd6log((LOG_INFO, + "%s: %s could not attach link-local address.\n", + __func__, if_name(ifp))); + } + + VERIFY(error == 0); + return (error); } /* * NOTE: in6_ifdetach() does not support loopback if at this moment. - * We don't need this function in bsdi, because interfaces are never removed - * from the ifnet list in bsdi. */ void -in6_ifdetach( - struct ifnet *ifp) +in6_ifdetach(struct ifnet *ifp) { - struct in6_ifaddr *ia, *oia, *nia; - struct ifaddr *ifa, *next; + struct in6_ifaddr *ia, *oia; + struct ifaddr *ifa; struct rtentry *rt; struct sockaddr_in6 sin6; + struct in6_multi_mship *imm; + int unlinked; - /* nuke prefix list. this may try to remove some of ifaddrs as well */ - in6_purgeprefix(ifp); + lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED); /* remove neighbor management table */ nd6_purge(ifp); /* nuke any of IPv6 addresses we have */ - - lck_mtx_lock(nd6_mutex); - for (ia = in6_ifaddrs; ia != NULL; ia = nia) { - nia = ia->ia_next; - if (ia->ia_ifa.ifa_ifp != ifp) + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); + ia = in6_ifaddrs; + while (ia != NULL) { + if (ia->ia_ifa.ifa_ifp != ifp) { + ia = ia->ia_next; continue; - in6_purgeaddr(&ia->ia_ifa, 1); + } + 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 caused in6_ifaddr_rwlock + * to be dropped and reacquired; + * therefore search again from the beginning + * of in6_ifaddrs list. + */ + ia = in6_ifaddrs; } - lck_mtx_unlock(nd6_mutex); + lck_rw_done(&in6_ifaddr_rwlock); ifnet_lock_exclusive(ifp); /* undo everything done by in6_ifattach(), just in case */ - for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = next) - { - next = ifa->ifa_list.tqe_next; - - - if (ifa->ifa_addr->sa_family != AF_INET6 - || !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) { + ifa = TAILQ_FIRST(&ifp->if_addrlist); + while (ifa != NULL) { + IFA_LOCK(ifa); + if (ifa->ifa_addr->sa_family != AF_INET6 || + !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)-> + sin6_addr)) { + IFA_UNLOCK(ifa); + ifa = TAILQ_NEXT(ifa, ifa_list); continue; } ia = (struct in6_ifaddr *)ifa; - /* remove from the routing table */ - if ((ia->ia_flags & IFA_ROUTE) && - (rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0, 0))) { - (void) rtrequest(RTM_DELETE, - (struct sockaddr *)&ia->ia_addr, - (struct sockaddr *)&ia->ia_addr, - (struct sockaddr *)&ia->ia_prefixmask, - rt->rt_flags, (struct rtentry **)0); - rtfree(rt); + /* hold a reference for this routine */ + IFA_ADDREF_LOCKED(ifa); + /* remove from the linked list */ + if_detach_ifa(ifp, ifa); + IFA_UNLOCK(ifa); + + /* + * Leaving the multicast group(s) may involve freeing the + * link address multicast structure(s) for the interface, + * which is protected by ifnet lock. To avoid violating + * lock ordering, we must drop ifnet lock before doing so. + * The ifa won't go away since we held a refcnt above. + */ + ifnet_lock_done(ifp); + + /* + * We have to do this work manually here instead of calling + * in6_purgeaddr() since in6_purgeaddr() uses the RTM_HOST flag. + */ + + /* + * 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); } - /* remove from the linked list */ - if_detach_ifa(ifp, &ia->ia_ifa); + /* remove from the routing table */ + if (ia->ia_flags & IFA_ROUTE) { + IFA_UNLOCK(ifa); + rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0, 0); + if (rt != NULL) { + (void) rtrequest(RTM_DELETE, + (struct sockaddr *)&ia->ia_addr, + (struct sockaddr *)&ia->ia_addr, + (struct sockaddr *)&ia->ia_prefixmask, + rt->rt_flags, (struct rtentry **)0); + rtfree(rt); + } + } else { + IFA_UNLOCK(ifa); + } /* also remove from the IPv6 address chain(itojun&jinmei) */ + unlinked = 1; oia = ia; - lck_mtx_lock(nd6_mutex); - if (oia == (ia = in6_ifaddrs)) + lck_rw_lock_exclusive(&in6_ifaddr_rwlock); + if (oia == (ia = in6_ifaddrs)) { in6_ifaddrs = ia->ia_next; - else { + } else { while (ia->ia_next && (ia->ia_next != oia)) ia = ia->ia_next; - if (ia->ia_next) + if (ia->ia_next) { ia->ia_next = oia->ia_next; - else { - nd6log((LOG_ERR, + } else { + nd6log((LOG_ERR, "%s: didn't unlink in6ifaddr from " "list\n", if_name(ifp))); + unlinked = 0; } } - lck_mtx_unlock(nd6_mutex); + lck_rw_done(&in6_ifaddr_rwlock); - ifafree(&oia->ia_ifa); + ifa = &oia->ia_ifa; + /* + * 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); + + /* + * This is suboptimal, but since we dropped ifnet lock above + * the list might have changed. Repeat the search from the + * beginning until we find the first eligible IPv6 address. + */ + ifnet_lock_exclusive(ifp); + ifa = TAILQ_FIRST(&ifp->if_addrlist); } ifnet_lock_done(ifp); + /* invalidate route caches */ + routegenid_inet6_update(); + /* * remove neighbor management table. we call it twice just to make * sure we nuke everything. maybe we need just one call. @@ -1057,15 +1112,15 @@ in6_ifdetach( nd6_purge(ifp); /* remove route to link-local allnodes multicast (ff02::1) */ - bzero(&sin6, sizeof(sin6)); - sin6.sin6_len = sizeof(struct sockaddr_in6); + bzero(&sin6, sizeof (sin6)); + sin6.sin6_len = sizeof (struct sockaddr_in6); sin6.sin6_family = AF_INET6; sin6.sin6_addr = in6addr_linklocal_allnodes; sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index); rt = rtalloc1((struct sockaddr *)&sin6, 0, 0); if (rt != NULL) { RT_LOCK(rt); - if (rt->rt_ifp == ifp) { + if (rt->rt_ifp == ifp) { /* * Prevent another thread from modifying rt_key, * rt_gateway via rt_setgate() after the rt_lock @@ -1083,63 +1138,64 @@ in6_ifdetach( } void -in6_get_tmpifid( - struct ifnet *ifp, - u_int8_t *retbuf, - const u_int8_t *baseid, - int generate) +in6_iid_mktmp(struct ifnet *ifp, u_int8_t *retbuf, const u_int8_t *baseid, + int generate) { u_int8_t nullbuf[8]; struct nd_ifinfo *ndi; lck_rw_lock_shared(nd_if_rwlock); - ndi = &nd_ifinfo[ifp->if_index]; - bzero(nullbuf, sizeof(nullbuf)); - if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) == 0) { + ndi = ND_IFINFO(ifp); + VERIFY(ndi != NULL && ndi->initialized); + lck_mtx_lock(&ndi->lock); + bzero(nullbuf, sizeof (nullbuf)); + if (bcmp(ndi->randomid, nullbuf, sizeof (nullbuf)) == 0) { /* we've never created a random ID. Create a new one. */ generate = 1; } if (generate) { - bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1)); + bcopy(baseid, ndi->randomseed1, sizeof (ndi->randomseed1)); - /* generate_tmp_ifid will update seedn and buf */ - (void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1, - ndi->randomid); + /* in6_generate_tmp_iid will update seedn and buf */ + (void) in6_generate_tmp_iid(ndi->randomseed0, ndi->randomseed1, + ndi->randomid); } + bcopy(ndi->randomid, retbuf, 8); + lck_mtx_unlock(&ndi->lock); lck_rw_done(nd_if_rwlock); } void -in6_tmpaddrtimer( - __unused void *ignored_arg) +in6_tmpaddrtimer(void *arg) { +#pragma unused(arg) int i; struct nd_ifinfo *ndi; u_int8_t nullbuf[8]; - timeout(in6_tmpaddrtimer, (caddr_t)0, - (ip6_temp_preferred_lifetime - ip6_desync_factor - - ip6_temp_regen_advance) * hz); - - if (ip6_use_tempaddr) { - lck_rw_lock_shared(nd_if_rwlock); - bzero(nullbuf, sizeof(nullbuf)); - for (i = 1; i < nd_ifinfo_indexlim + 1; i++) { - ndi = &nd_ifinfo[i]; - if (ndi->flags != ND6_IFF_PERFORMNUD) - continue; - if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) { - /* - * We've been generating a random ID on this interface. - * Create a new one. - */ - (void)generate_tmp_ifid(ndi->randomseed0, - ndi->randomseed1, - ndi->randomid); - } + timeout(in6_tmpaddrtimer, (caddr_t)0, (ip6_temp_preferred_lifetime - + ip6_desync_factor - ip6_temp_regen_advance) * hz); + + lck_rw_lock_shared(nd_if_rwlock); + bzero(nullbuf, sizeof (nullbuf)); + for (i = 1; i < if_index + 1; i++) { + if (!nd_ifinfo || i >= nd_ifinfo_indexlim) + break; + ndi = &nd_ifinfo[i]; + if (!ndi->initialized) + continue; + lck_mtx_lock(&ndi->lock); + if (bcmp(ndi->randomid, nullbuf, sizeof (nullbuf)) != 0) { + /* + * We've been generating a random ID on this interface. + * Create a new one. + */ + (void) in6_generate_tmp_iid(ndi->randomseed0, + ndi->randomseed1, ndi->randomid); } - lck_rw_done(nd_if_rwlock); + lck_mtx_unlock(&ndi->lock); } + lck_rw_done(nd_if_rwlock); }