X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/1c79356b52d46aa6b508fb032f5ae709b1f2897b..0c530ab8987f0ae6a1a3d9284f40182b88852816:/bsd/netinet6/in6_ifattach.c diff --git a/bsd/netinet6/in6_ifattach.c b/bsd/netinet6/in6_ifattach.c index 722b8f8b6..2ccb29cd0 100644 --- a/bsd/netinet6/in6_ifattach.c +++ b/bsd/netinet6/in6_ifattach.c @@ -1,4 +1,5 @@ -/* $KAME: in6_ifattach.c,v 1.41 2000/03/16 07:05:34 jinmei Exp $ */ +/* $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. @@ -33,15 +34,12 @@ #include #include #include +#include #include #include -#ifdef __bsdi__ -#include -#elif defined(__OpenBSD__) -#include -#else +#include #include -#endif +#include #include #include @@ -50,256 +48,724 @@ #include #include -#ifndef __NetBSD__ #include -#endif +#include #include #include +#include +#include #include #include #include +#include #include -static struct in6_addr llsol; - struct in6_ifstat **in6_ifstat = NULL; struct icmp6_ifstat **icmp6_ifstat = NULL; size_t in6_ifstatmax = 0; size_t icmp6_ifstatmax = 0; unsigned long in6_maxmtu = 0; +extern lck_mtx_t *nd6_mutex; -int found_first_ifid = 0; -#define IFID_LEN 8 -static u_int8_t first_ifid[IFID_LEN]; +#if IP6_AUTO_LINKLOCAL +int ip6_auto_linklocal = IP6_AUTO_LINKLOCAL; +#else +int ip6_auto_linklocal = 1; /* enable by default */ +#endif -static int laddr_to_eui64 __P((u_int8_t *, u_int8_t *, size_t)); -static int gen_rand_eui64 __P((u_int8_t *)); -#define DEBUG 1 +extern struct inpcbinfo udbinfo; +extern struct inpcbinfo ripcbinfo; +extern lck_mtx_t *rt_mtx; -static int -laddr_to_eui64(dst, src, len) - u_int8_t *dst; - u_int8_t *src; - size_t len; -{ - static u_int8_t zero[8]; - - bzero(zero, sizeof(zero)); - - switch (len) { - case 6: - if (bcmp(zero, src, 6) == 0) - return EINVAL; - dst[0] = src[0]; - dst[1] = src[1]; - dst[2] = src[2]; - dst[3] = 0xff; - dst[4] = 0xfe; - dst[5] = src[3]; - dst[6] = src[4]; - dst[7] = src[5]; - break; - case 8: - if (bcmp(zero, src, 8) == 0) - return EINVAL; - bcopy(src, dst, len); - break; - default: - return EINVAL; - } +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 *); - return 0; -} +#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)) + +#define IFID_LOCAL(in6) (!EUI64_LOCAL(in6)) +#define IFID_UNIVERSAL(in6) (!EUI64_UNIVERSAL(in6)) /* * Generate a last-resort interface identifier, when the machine has no * IEEE802/EUI64 address sources. - * The address should be random, and should not change across reboot. + * 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. */ static int -gen_rand_eui64(dst) - u_int8_t *dst; +get_rand_ifid( + struct ifnet *ifp, + struct in6_addr *in6) /* upper 64bits are preserved */ { MD5_CTX ctxt; u_int8_t digest[16]; -#if defined(__FreeBSD__) || defined (__APPLE__) int hostnamelen = strlen(hostname); + +#if 0 + /* we need at least several letters as seed for ifid */ + if (hostnamelen < 3) + return -1; #endif - /* generate 8bytes of pseudo-random value. */ + /* generate 8 bytes of pseudo-random value. */ bzero(&ctxt, sizeof(ctxt)); MD5Init(&ctxt); MD5Update(&ctxt, hostname, hostnamelen); MD5Final(digest, &ctxt); - /* assumes sizeof(digest) > sizeof(first_ifid) */ - bcopy(digest, dst, 8); + /* assumes sizeof(digest) > sizeof(ifid) */ + bcopy(digest, &in6->s6_addr[8], 8); /* make sure to set "u" bit to local, and "g" bit to individual. */ - dst[0] &= 0xfe; - dst[0] |= 0x02; /* EUI64 "local" */ + in6->s6_addr[8] &= ~EUI64_GBIT; /* g bit to "individual" */ + in6->s6_addr[8] |= EUI64_UBIT; /* u bit to "local" */ + + /* convert EUI64 into IPv6 interface identifier */ + EUI64_TO_IFID(in6); + + return 0; +} + +static int +generate_tmp_ifid( + 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]; + 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) { + int i; + + for (i = 0; i < 2; i++) { + microtime(&tv); + val32 = random() ^ tv.tv_usec; + bcopy(&val32, seed + sizeof(val32) * i, sizeof(val32)); + } + } else { + bcopy(seed0, seed, 8); + } + + /* copy the right-most 64-bits of the given address */ + /* XXX assumption on the size of IFID */ + bcopy(seed1, &seed[8], 8); + + if (0) { /* for debugging purposes only */ + int i; + + printf("generate_tmp_ifid: new randomized ID from: "); + 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); + + /* + * RFC 3041 3.2.1. (3) + * Take the left-most 64-bits of the MD5 digest and set bit 6 (the + * left-most bit is numbered 0) to zero. + */ + bcopy(digest, ret, 8); + ret[0] &= ~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"); + + microtime(&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 + * stable storage as the history value to be used in the next + * iteration of the algorithm. + */ + bcopy(&digest[8], seed0, 8); + + if (0) { /* for debugging purposes only */ + int i; + + printf("to: "); + for (i = 0; i < 16; i++) + printf("%02x", digest[i]); + printf("\n"); + } return 0; } /* - * Find first ifid on list of interfaces. - * This is assumed that ifp0's interface token (for example, IEEE802 MAC) - * is globally unique. We may need to have a flag parameter in the future. + * Get interface identifier for the specified interface. + * XXX assumes single sockaddr_dl (AF_LINK address) per an interface */ -int -in6_ifattach_getifid(ifp0) - struct ifnet *ifp0; +static int +get_hw_ifid( + struct ifnet *ifp, + struct in6_addr *in6) /* upper 64bits are preserved */ { - struct ifnet *ifp; struct ifaddr *ifa; - u_int8_t *addr = NULL; - int addrlen = 0; 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 }; + + /* 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; - if (found_first_ifid) - return 0; + goto found; + } + ifnet_lock_done(ifp); -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - for (ifp = ifnet; ifp; ifp = ifp->if_next) -#else - for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next) + return -1; + +found: + ifnet_lock_done(ifp); + addr = LLADDR(sdl); + addrlen = sdl->sdl_alen; + + /* get EUI64 */ + switch (ifp->if_type) { + case IFT_ETHER: + case IFT_FDDI: + case IFT_ATM: + case IFT_IEEE1394: + case IFT_L2VLAN: + case IFT_IEEE8023ADLAG: +#if IFT_IEEE80211 + case IFT_IEEE80211: #endif - { - if (ifp0 != NULL && ifp0 != ifp) + /* IEEE802/EUI64 cases - what others? */ + /* IEEE1394 uses 16byte length address starting with EUI64 */ + if (addrlen > 8) + addrlen = 8; + + /* look at IEEE802/EUI64 only */ + if (addrlen != 8 && addrlen != 6) + return -1; + + /* + * check for invalid MAC address - on bsdi, we see it a lot + * since wildboar configures all-zero MAC on pccard before + * card insertion. + */ + if (bcmp(addr, allzero, addrlen) == 0) + return -1; + if (bcmp(addr, allone, addrlen) == 0) + return -1; + + /* make EUI64 address */ + if (addrlen == 8) + bcopy(addr, &in6->s6_addr[8], 8); + else if (addrlen == 6) { + in6->s6_addr[8] = addr[0]; + in6->s6_addr[9] = addr[1]; + in6->s6_addr[10] = addr[2]; + in6->s6_addr[11] = 0xff; + in6->s6_addr[12] = 0xfe; + in6->s6_addr[13] = addr[3]; + in6->s6_addr[14] = addr[4]; + in6->s6_addr[15] = addr[5]; + } + break; + + case IFT_ARCNET: + if (addrlen != 1) + return -1; + if (!addr[0]) + return -1; + + bzero(&in6->s6_addr[8], 8); + in6->s6_addr[15] = addr[0]; + + /* + * 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" */ + break; + + case IFT_GIF: +#if IFT_STF + case IFT_STF: +#endif + /* + * RFC2893 says: "SHOULD use IPv4 address as ifid source". + * however, IPv4 address is not very suitable as unique + * identifier source (can be renumbered). + * we don't do this. + */ + return -1; + + default: + return -1; + } + + /* sanity check: g bit must not indicate "group" */ + if (EUI64_GROUP(in6)) + return -1; + + /* convert EUI64 into IPv6 interface identifier */ + EUI64_TO_IFID(in6); + + /* + * sanity check: ifid must not be all zero, avoid conflict with + * subnet router anycast + */ + if ((in6->s6_addr[8] & ~(EUI64_GBIT | EUI64_UBIT)) == 0x00 && + bcmp(&in6->s6_addr[9], allzero, 7) == 0) { + return -1; + } + + return 0; +} + +/* + * Get interface identifier for the specified interface. If it is not + * available on ifp0, borrow interface identifier from other information + * sources. + */ +static int +get_ifid( + struct ifnet *ifp0, + struct ifnet *altifp, /* secondary EUI64 source */ + struct in6_addr *in6) +{ + 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_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_name(ifp0), if_name(altifp))); + goto success; + } + + /* next, try to get it from some other hardware interface */ + ifnet_head_lock_shared(); + TAILQ_FOREACH(ifp, &ifnet_head, if_list) { + if (ifp == ifp0) + continue; + if (get_hw_ifid(ifp, in6) != 0) continue; -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) + + /* + * to borrow ifid from other interface, ifid needs to be + * globally unique + */ + if (IFID_UNIVERSAL(in6)) { + nd6log((LOG_DEBUG, + "%s: borrow interface identifier from %s\n", + if_name(ifp0), if_name(ifp))); + ifnet_head_done(); + goto success; + } + } + 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))); + goto success; + } + + printf("%s: failed to get interface identifier\n", if_name(ifp0)); + return -1; + +success: + nd6log((LOG_INFO, "%s: ifid: " + "%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; +} + +static int +in6_ifattach_linklocal( + struct ifnet *ifp, + struct ifnet *altifp, /* secondary EUI64 source */ + struct in6_aliasreq *ifra_passed) +{ + struct in6_ifaddr *ia; + struct in6_aliasreq ifra; + struct nd_prefix pr0; + int i, error; + + /* + * configure link-local address. + */ + bzero(&ifra, sizeof(ifra)); + + dlil_plumb_protocol(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 && 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 - for (ifa = ifp->if_addrlist.tqh_first; - ifa; - ifa = ifa->ifa_list.tqe_next) + ifra.ifra_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); /* XXX */ #endif - { - 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; - switch (ifp->if_type) { - case IFT_ETHER: - case IFT_FDDI: - case IFT_ATM: - /* IEEE802/EUI64 cases - what others? */ - addr = LLADDR(sdl); - addrlen = sdl->sdl_alen; - /* - * to copy ifid from IEEE802/EUI64 interface, - * u bit of the source needs to be 0. - */ - if ((addr[0] & 0x02) != 0) - break; - goto found; - case IFT_ARCNET: - /* - * ARCnet interface token cannot be used as - * globally unique identifier due to its - * small bitwidth. - */ - break; - default: - break; + 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 } -#if DEBUG - printf("in6_ifattach_getifid: failed to get EUI64"); + 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 - return EADDRNOTAVAIL; + /* link-local addresses should NEVER expire. */ + ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; + ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; -found: - if (laddr_to_eui64(first_ifid, addr, addrlen) == 0) - found_first_ifid = 1; - - if (found_first_ifid) { - printf("%s: supplying EUI64: " - "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", - if_name(ifp), - first_ifid[0] & 0xff, first_ifid[1] & 0xff, - first_ifid[2] & 0xff, first_ifid[3] & 0xff, - first_ifid[4] & 0xff, first_ifid[5] & 0xff, - first_ifid[6] & 0xff, first_ifid[7] & 0xff); - - /* invert u bit to convert EUI64 to RFC2373 interface ID. */ - first_ifid[0] ^= 0x02; - - return 0; - } else { -#if DEBUG - printf("in6_ifattach_getifid: failed to get EUI64"); + /* + * 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)) != 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) + */ + if (error != EAFNOSUPPORT) + log(LOG_NOTICE, "in6_ifattach_linklocal: 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 - return EADDRNOTAVAIL; + if (in6if_do_dad(ifp) && (ifp->if_flags & IFF_POINTOPOINT) == 0) { + ia->ia6_flags &= ~IN6_IFF_NODAD; + ia->ia6_flags |= IN6_IFF_TENTATIVE; + } + + /* + * Make the link-local prefix (fe80::/64%link) 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)); + 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; + /* 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] &= + in6mask64.s6_addr32[i]; + } + /* + * Initialize parameters. The link-local prefix must always be + * on-link, and its lifetimes never expire. + */ + pr0.ndpr_raf_onlink = 1; + pr0.ndpr_raf_auto = 1; /* probably meaningless */ + pr0.ndpr_vltime = ND6_INFINITE_LIFETIME; + pr0.ndpr_pltime = ND6_INFINITE_LIFETIME; + /* + * Since there is no other link-local addresses, nd6_prefix_lookup() + * probably returns NULL. However, we cannot always expect the result. + * For example, if we first remove the (only) existing link-local + * address, and then reconfigure another one, the prefix is still + * valid with referring to the old link-local address. + */ + if (nd6_prefix_lookup(&pr0) == NULL) { + if ((error = nd6_prelist_add(&pr0, NULL, NULL)) != 0) + return(error); + } + + in6_post_msg(ifp, KEV_INET6_NEW_LL_ADDR, ia); + return 0; +} + +static int +in6_ifattach_loopback( + struct ifnet *ifp) /* must be IFT_LOOP */ +{ + struct in6_aliasreq ifra; + int error; + + 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)); + + ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); + ifra.ifra_prefixmask.sin6_family = AF_INET6; + ifra.ifra_prefixmask.sin6_addr = in6mask128; + + /* + * 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_family = AF_INET6; + ifra.ifra_dstaddr.sin6_addr = in6addr_loopback; + + ifra.ifra_addr.sin6_len = sizeof(struct sockaddr_in6); + ifra.ifra_addr.sin6_family = AF_INET6; + ifra.ifra_addr.sin6_addr = in6addr_loopback; + + /* the loopback address should NEVER expire. */ + ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; + ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; + + /* 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)) != 0) { + log(LOG_ERR, "in6_ifattach_loopback: failed to configure " + "the loopback address on %s (errno=%d)\n", + if_name(ifp), error); + return(-1); } + + return 0; } /* - * XXX multiple loopback interface needs more care. for instance, - * nodelocal address needs to be configured onto only one of them. + * compute NI group address, based on the current hostname setting. + * see draft-ietf-ipngwg-icmp-name-lookup-* (04 and later). + * + * when ifp == NULL, the caller is responsible for filling scopeid. */ +int +in6_nigroup( + struct ifnet *ifp, + const char *name, + int namelen, + struct in6_addr *in6) +{ + const char *p; + u_char *q; + MD5_CTX ctxt; + u_int8_t digest[16]; + char l; + char n[64]; /* a single label must not exceed 63 chars */ + + if (!namelen || !name) + return -1; + + p = name; + while (p && *p && *p != '.' && p - name < namelen) + p++; + if (p - name > sizeof(n) - 1) + return -1; /* label too long */ + l = p - name; + strncpy(n, name, l); + n[(int)l] = '\0'; + for (q = 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); + in6->s6_addr8[11] = 2; + bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3])); + + return 0; +} + void -in6_ifattach(ifp, type, laddr, noloop) - struct ifnet *ifp; - u_int type; - caddr_t laddr; - /* size_t laddrlen; */ - int noloop; +in6_nigroup_attach( + const char *name, + int namelen) { - static size_t if_indexlim = 8; + struct ifnet *ifp; struct sockaddr_in6 mltaddr; - struct sockaddr_in6 mltmask; - struct sockaddr_in6 gate; - struct sockaddr_in6 mask; -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - struct ifaddr **ifap; -#endif - - struct in6_ifaddr *ia, *ib, *oia; - struct ifaddr *ifa; - int rtflag = 0; - int s; + struct in6_multi *in6m; int error; - if (type == IN6_IFT_P2P && found_first_ifid == 0) { - printf("%s: no ifid available for IPv6 link-local address\n", - if_name(ifp)); -#if 0 + 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; -#else - /* last resort */ - if (gen_rand_eui64(first_ifid) == 0) { - printf("%s: using random value as EUI64: " - "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", - if_name(ifp), - first_ifid[0] & 0xff, first_ifid[1] & 0xff, - first_ifid[2] & 0xff, first_ifid[3] & 0xff, - first_ifid[4] & 0xff, first_ifid[5] & 0xff, - first_ifid[6] & 0xff, first_ifid[7] & 0xff); - /* - * invert u bit to convert EUI64 to RFC2373 interface - * ID. - */ - first_ifid[0] ^= 0x02; - - found_first_ifid = 1; + + 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)); + } } -#endif } + ifnet_head_done(); +} - if ((ifp->if_flags & IFF_MULTICAST) == 0) { - printf("%s: not multicast capable, IPv6 not enabled\n", - if_name(ifp)); +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(); +} + +/* + * 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 + */ +void +in6_ifattach( + struct ifnet *ifp, + struct ifnet *altifp, /* secondary EUI64 source */ + struct in6_aliasreq *ifra) +{ + static size_t if_indexlim = 8; + struct in6_ifaddr *ia; + struct in6_addr in6; /* * We have some arrays that should be indexed by if_index. @@ -307,8 +773,8 @@ in6_ifattach(ifp, type, laddr, noloop) * struct in6_ifstat **in6_ifstat * struct icmp6_ifstat **icmp6_ifstat */ - if (in6_ifstat == NULL || icmp6_ifstat == NULL - || if_index >= if_indexlim) { + if (in6_ifstat == NULL || icmp6_ifstat == NULL || + if_index >= if_indexlim) { size_t n; caddr_t q; size_t olim; @@ -324,7 +790,7 @@ in6_ifattach(ifp, type, laddr, noloop) if (in6_ifstat) { bcopy((caddr_t)in6_ifstat, q, olim * sizeof(struct in6_ifstat *)); - _FREE((caddr_t)in6_ifstat, M_IFADDR); + FREE((caddr_t)in6_ifstat, M_IFADDR); } in6_ifstat = (struct in6_ifstat **)q; in6_ifstatmax = if_indexlim; @@ -336,359 +802,83 @@ in6_ifattach(ifp, type, laddr, noloop) if (icmp6_ifstat) { bcopy((caddr_t)icmp6_ifstat, q, olim * sizeof(struct icmp6_ifstat *)); - _FREE((caddr_t)icmp6_ifstat, M_IFADDR); + FREE((caddr_t)icmp6_ifstat, M_IFADDR); } icmp6_ifstat = (struct icmp6_ifstat **)q; icmp6_ifstatmax = if_indexlim; } - /* - * To prevent to assign link-local address to PnP network - * cards multiple times. - * This is lengthy for P2P and LOOP but works. - */ -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - ifa = ifp->if_addrlist; - if (ifa != NULL) { - for ( ; ifa; ifa = ifa->ifa_next) { - ifap = &ifa->ifa_next; - if (ifa->ifa_addr->sa_family != AF_INET6) - continue; - if (IN6_IS_ADDR_LINKLOCAL(&satosin6(ifa->ifa_addr)->sin6_addr)) - return; - } - } else - ifap = &ifp->if_addrlist; -#else - ifa = TAILQ_FIRST(&ifp->if_addrlist); - if (ifa != NULL) { - for ( ; ifa; ifa = TAILQ_NEXT(ifa, ifa_list)) { - if (ifa->ifa_addr->sa_family != AF_INET6) - continue; - if (IN6_IS_ADDR_LINKLOCAL(&satosin6(ifa->ifa_addr)->sin6_addr)) - return; - } - } else { - TAILQ_INIT(&ifp->if_addrlist); - } -#endif + /* initialize NDP variables */ + nd6_ifattach(ifp); - /* - * link-local address - */ - ia = (struct in6_ifaddr *)_MALLOC(sizeof(*ia), M_IFADDR, M_WAITOK); - bzero((caddr_t)ia, sizeof(*ia)); - ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; - if (ifp->if_flags & IFF_POINTOPOINT) - ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; - else - ia->ia_ifa.ifa_dstaddr = NULL; - ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; - ia->ia_ifp = ifp; -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - *ifap = (struct ifaddr *)ia; -#else - TAILQ_INSERT_TAIL(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list); -#endif - ia->ia_ifa.ifa_refcnt++; + /* initialize scope identifiers */ + scope6_ifattach(ifp); /* - * Also link into the IPv6 address chain beginning with in6_ifaddr. - * kazu opposed it, but itojun & jinmei wanted. + * quirks based on interface type */ - if ((oia = in6_ifaddr) != NULL) { - for (; oia->ia_next; oia = oia->ia_next) - continue; - oia->ia_next = ia; - } else - in6_ifaddr = ia; - ia->ia_ifa.ifa_refcnt++; - - ia->ia_prefixmask.sin6_len = sizeof(struct sockaddr_in6); - ia->ia_prefixmask.sin6_family = AF_INET6; - ia->ia_prefixmask.sin6_addr = in6mask64; - - bzero(&ia->ia_addr, sizeof(struct sockaddr_in6)); - ia->ia_addr.sin6_len = sizeof(struct sockaddr_in6); - ia->ia_addr.sin6_family = AF_INET6; - ia->ia_addr.sin6_addr.s6_addr16[0] = htons(0xfe80); - ia->ia_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); - ia->ia_addr.sin6_addr.s6_addr32[1] = 0; - - switch (type) { - case IN6_IFT_LOOP: - ia->ia_addr.sin6_addr.s6_addr32[2] = 0; - ia->ia_addr.sin6_addr.s6_addr32[3] = htonl(1); - if (strcmp(ifp->if_name, "lo") == 0) { - ia->ia_ifa.ifa_dlt = lo_attach_inet(ifp); - printf("in6_ifattach: IFT_LOOP setting initial ifp=%s%d initial ia=%x ifa_dlt=%x\n", - ifp->if_name, ifp->if_unit, ia, ia->ia_ifa.ifa_dlt); - } - break; - case IN6_IFT_802: - ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; - ia->ia_ifa.ifa_flags |= RTF_CLONING; - rtflag = RTF_CLONING; - if (strcmp(ifp->if_name, "en") == 0) { - ia->ia_ifa.ifa_dlt = ether_attach_inet6(ifp); - printf("in6_ifattach: IFT_802 setting initial ifp=%s%d initial ia=%x ifa_dlt=%x\n", - ifp->if_name, ifp->if_unit, ia, ia->ia_ifa.ifa_dlt); - } - - /* fall through */ - case IN6_IFT_P2P802: - ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; - ia->ia_ifa.ifa_flags |= RTF_CLONING; - rtflag = RTF_CLONING; - if (laddr == NULL) - break; - /* XXX use laddrlen */ - if (laddr_to_eui64(&ia->ia_addr.sin6_addr.s6_addr8[8], - laddr, 6) != 0) { - break; - } - /* invert u bit to convert EUI64 to RFC2373 interface ID. */ - ia->ia_addr.sin6_addr.s6_addr8[8] ^= 0x02; - if (found_first_ifid == 0) - in6_ifattach_getifid(ifp); - bzero(&ia->ia_dstaddr, sizeof(struct sockaddr_in6)); - ia->ia_dstaddr.sin6_len = sizeof(struct sockaddr_in6); - ia->ia_dstaddr.sin6_family = AF_INET6; - - if (ia->ia_ifa.ifa_dlt == 0) { - ia->ia_ifa.ifa_dlt = ifp; -#if DEBUG - printf("in6_ifattach: IFT_P2P802 setting initial ifp=%s%d initial ia=%x ifa_dlt=%x\n", - ifp->if_name, ifp->if_unit, ia, ia->ia_ifa.ifa_dlt); -#endif - } - break; - case IN6_IFT_P2P: - ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; - ia->ia_ifa.ifa_flags |= RTF_CLONING; - rtflag = RTF_CLONING; - bcopy((caddr_t)first_ifid, - (caddr_t)&ia->ia_addr.sin6_addr.s6_addr8[8], - IFID_LEN); - bzero(&ia->ia_dstaddr, sizeof(struct sockaddr_in6)); - ia->ia_dstaddr.sin6_len = sizeof(struct sockaddr_in6); - ia->ia_dstaddr.sin6_family = AF_INET6; - - if (strcmp(ifp->if_name, "gif") == 0) { - ia->ia_ifa.ifa_dlt = gif_attach_inet(ifp); -#if DEBUG - printf("in6_ifattach: IFT_P2P setting initial ifp=%s%d initial ia=%x ifa_dlt=%x\n", - ifp->if_name, ifp->if_unit, ia, ia->ia_ifa.ifa_dlt); + switch (ifp->if_type) { +#if IFT_STF + case IFT_STF: + /* + * 6to4 interface is a very special kind of beast. + * no multicast, no linklocal. RFC2529 specifies how to make + * linklocals for 6to4 interface, but there's no use and + * it is rather harmful to have one. + */ + goto statinit; #endif - } + default: break; - case IN6_IFT_ARCNET: - ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; - ia->ia_ifa.ifa_flags |= RTF_CLONING; - rtflag = RTF_CLONING; - if (laddr == NULL) - break; - - /* make non-global IF id out of link-level address */ - bzero(&ia->ia_addr.sin6_addr.s6_addr8[8], 7); - ia->ia_addr.sin6_addr.s6_addr8[15] = *laddr; - ia->ia_ifa.ifa_dlt = ifp; -#if DEBUG - printf("in6_ifattach: IFT_ARCNET setting initial ifp=%s%d initial ia=%x ifa_dlt=%x\n", - ifp->if_name, ifp->if_unit, ia, ia->ia_ifa.ifa_dlt); -#endif } - ia->ia_ifa.ifa_metric = ifp->if_metric; - - /* - * give the interface a chance to initialize, in case this - * is the first address to be added. + * usually, we require multicast capability to the interface */ - s = splimp(); -#ifdef __APPLE__ - error = dlil_ioctl(0, ifp, SIOCSIFADDR, (caddr_t)ia); -#else - error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); -#endif - splx(s); -#if DEBUG - printf("in6_ifattach: Calling SIOCSIFADDR for if=%s%d ia=%x error=%x\n", ifp->if_name, ifp->if_unit, ia, error); -#endif - if (error == EOPNOTSUPP) - error = 0; - - if (error) { - switch (error) { - case EAFNOSUPPORT: - printf("%s: IPv6 not supported\n", - if_name(ifp)); - break; - default: - printf("%s: SIOCSIFADDR error %d\n", - if_name(ifp), error); - break; - } - - /* undo changes */ -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - *ifap = NULL; -#else - TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list); -#endif - IFAFREE(&ia->ia_ifa); - if (oia) - oia->ia_next = ia->ia_next; - else - in6_ifaddr = ia->ia_next; - IFAFREE(&ia->ia_ifa); + if ((ifp->if_flags & IFF_MULTICAST) == 0) { + log(LOG_INFO, "in6_ifattach: " + "%s is not multicast capable, IPv6 not enabled\n", + if_name(ifp)); return; } - /* add route to the interface. */ - rtrequest(RTM_ADD, - (struct sockaddr *)&ia->ia_addr, - (struct sockaddr *)&ia->ia_addr, - (struct sockaddr *)&ia->ia_prefixmask, - RTF_UP|rtflag, - (struct rtentry **)0); - ia->ia_flags |= IFA_ROUTE; - - if (type == IN6_IFT_P2P || type == IN6_IFT_P2P802) { - /* - * route local address to loopback - */ - bzero(&gate, sizeof(gate)); - gate.sin6_len = sizeof(struct sockaddr_in6); - gate.sin6_family = AF_INET6; - gate.sin6_addr = in6addr_loopback; - bzero(&mask, sizeof(mask)); - mask.sin6_len = sizeof(struct sockaddr_in6); - mask.sin6_family = AF_INET6; - mask.sin6_addr = in6mask64; - rtrequest(RTM_ADD, - (struct sockaddr *)&ia->ia_addr, - (struct sockaddr *)&gate, - (struct sockaddr *)&mask, - RTF_UP|RTF_HOST, - (struct rtentry **)0); - } - /* - * loopback address + * assign loopback address for loopback interface. + * XXX multiple loopback interface case. */ - ib = (struct in6_ifaddr *)NULL; - if (type == IN6_IFT_LOOP) { - ib = (struct in6_ifaddr *) - _MALLOC(sizeof(*ib), M_IFADDR, M_WAITOK); - bzero((caddr_t)ib, sizeof(*ib)); - ib->ia_ifa.ifa_addr = (struct sockaddr *)&ib->ia_addr; - ib->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ib->ia_dstaddr; - ib->ia_ifa.ifa_netmask = (struct sockaddr *)&ib->ia_prefixmask; - ib->ia_ifa.ifa_dlt = lo_attach_inet(ifp); - ib->ia_ifp = ifp; - - ia->ia_next = ib; -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - ia->ia_ifa.ifa_next = (struct ifaddr *)ib; -#else - TAILQ_INSERT_TAIL(&ifp->if_addrlist, (struct ifaddr *)ib, - ifa_list); -#endif - ib->ia_ifa.ifa_refcnt++; - - ib->ia_prefixmask.sin6_len = sizeof(struct sockaddr_in6); - ib->ia_prefixmask.sin6_family = AF_INET6; - ib->ia_prefixmask.sin6_addr = in6mask128; - ib->ia_addr.sin6_len = sizeof(struct sockaddr_in6); - ib->ia_addr.sin6_family = AF_INET6; - ib->ia_addr.sin6_addr = in6addr_loopback; - - /* - * Always initialize ia_dstaddr (= broadcast address) - * to loopback address, to make getifaddr happier. - * - * For BSDI, it is mandatory. The BSDI version of - * ifa_ifwithroute() rejects to add a route to the loopback - * interface. Even for other systems, loopback looks somewhat - * special. - */ - ib->ia_dstaddr.sin6_len = sizeof(struct sockaddr_in6); - ib->ia_dstaddr.sin6_family = AF_INET6; - ib->ia_dstaddr.sin6_addr = in6addr_loopback; - - ib->ia_ifa.ifa_metric = ifp->if_metric; - - rtrequest(RTM_ADD, - (struct sockaddr *)&ib->ia_addr, - (struct sockaddr *)&ib->ia_addr, - (struct sockaddr *)&ib->ia_prefixmask, - RTF_UP|RTF_HOST, - (struct rtentry **)0); - - ib->ia_flags |= IFA_ROUTE; + if ((ifp->if_flags & IFF_LOOPBACK) != 0) { + struct in6_ifaddr *ia6 = NULL; + in6 = in6addr_loopback; + if ((ia6 = in6ifa_ifpwithaddr(ifp, &in6)) == NULL) { + if (in6_ifattach_loopback(ifp) != 0) + return; + } + else { + ifafree(&ia6->ia_ifa); + } } /* - * join multicast + * assign a link-local address, if there's none. */ - if (ifp->if_flags & IFF_MULTICAST) { - int error; /* not used */ - -#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__) - /* Restore saved multicast addresses(if any). */ - in6_restoremkludge(ia, ifp); -#endif - - bzero(&mltmask, sizeof(mltmask)); - mltmask.sin6_len = sizeof(struct sockaddr_in6); - mltmask.sin6_family = AF_INET6; - mltmask.sin6_addr = in6mask32; - - /* - * join link-local all-nodes address - */ - bzero(&mltaddr, sizeof(mltaddr)); - mltaddr.sin6_len = sizeof(struct sockaddr_in6); - mltaddr.sin6_family = AF_INET6; - mltaddr.sin6_addr = in6addr_linklocal_allnodes; - mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); - rtrequest(RTM_ADD, - (struct sockaddr *)&mltaddr, - (struct sockaddr *)&ia->ia_addr, - (struct sockaddr *)&mltmask, - RTF_UP|RTF_CLONING, /* xxx */ - (struct rtentry **)0); - (void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error); - - if (type == IN6_IFT_LOOP) { - /* - * join node-local all-nodes address - */ - mltaddr.sin6_addr = in6addr_nodelocal_allnodes; - rtrequest(RTM_ADD, - (struct sockaddr *)&mltaddr, - (struct sockaddr *)&ib->ia_addr, - (struct sockaddr *)&mltmask, - RTF_UP, - (struct rtentry **)0); - (void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error); - } else { - /* - * join solicited multicast address - */ - bzero(&llsol, sizeof(llsol)); - llsol.s6_addr16[0] = htons(0xff02); - llsol.s6_addr16[1] = htons(ifp->if_index); - 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; - (void)in6_addmulti(&llsol, ifp, &error); + 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? */ + } } } +#if IFT_STF /* XXX */ +statinit: +#endif + /* update dynamically. */ if (in6_maxmtu < ifp->if_mtu) in6_maxmtu = ifp->if_mtu; @@ -703,53 +893,24 @@ in6_ifattach(ifp, type, laddr, noloop) _MALLOC(sizeof(struct icmp6_ifstat), M_IFADDR, M_WAITOK); bzero(icmp6_ifstat[ifp->if_index], sizeof(struct icmp6_ifstat)); } - - /* initialize NDP variables */ - nd6_ifattach(ifp); - - /* mark the address TENTATIVE, if needed. */ - switch (ifp->if_type) { - case IFT_ARCNET: - case IFT_ETHER: - case IFT_FDDI: -#if 0 - case IFT_ATM: - case IFT_SLIP: - case IFT_PPP: -#endif - ia->ia6_flags |= IN6_IFF_TENTATIVE; - /* nd6_dad_start() will be called in in6_if_up */ - break; - case IFT_DUMMY: - case IFT_GIF: /*XXX*/ - case IFT_LOOP: - case IFT_FAITH: - default: - break; - } - - return; } /* * 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(ifp) - struct ifnet *ifp; +in6_ifdetach( + struct ifnet *ifp) { - struct in6_ifaddr *ia, *oia; - struct ifaddr *ifa; -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - struct ifaddr *ifaprev = NULL; -#endif + struct in6_ifaddr *ia, *oia, *nia; + struct ifaddr *ifa, *next; struct rtentry *rt; short rtflags; struct sockaddr_in6 sin6; struct in6_multi *in6m; -#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined (__APPLE__) struct in6_multi *in6m_next; -#endif /* nuke prefix list. this may try to remove some of ifaddrs as well */ in6_purgeprefix(ifp); @@ -757,90 +918,80 @@ in6_ifdetach(ifp) /* remove neighbor management table */ nd6_purge(ifp); -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) -#else - for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) -#endif + /* 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) + continue; + in6_purgeaddr(&ia->ia_ifa, 1); + } + lck_mtx_unlock(nd6_mutex); + + 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)) { -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - ifaprev = ifa; -#endif continue; } ia = (struct in6_ifaddr *)ifa; -#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__) - /* leave from all multicast groups joined */ - while ((in6m = LIST_FIRST(&oia->ia6_multiaddrs)) != NULL) - in6_delmulti(in6m); -#endif - /* remove from the routing table */ + lck_mtx_lock(rt_mtx); if ((ia->ia_flags & IFA_ROUTE) - && (rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0 -#if defined (__FreeBSD__) || defined (__APPLE__) - , 0UL -#endif - ))) { + && (rt = rtalloc1_locked((struct sockaddr *)&ia->ia_addr, 0, 0UL))) { rtflags = rt->rt_flags; - rtfree(rt); - rtrequest(RTM_DELETE, + rtfree_locked(rt); + rtrequest_locked(RTM_DELETE, (struct sockaddr *)&ia->ia_addr, (struct sockaddr *)&ia->ia_addr, (struct sockaddr *)&ia->ia_prefixmask, rtflags, (struct rtentry **)0); } + lck_mtx_unlock(rt_mtx); /* remove from the linked list */ -#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) - if (ifaprev) - ifaprev->ifa_next = ifa->ifa_next; - else - ifp->if_addrlist = ifa->ifa_next; -#else - TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list); -#endif + if_detach_ifa(ifp, &ia->ia_ifa); + ifafree(&ia->ia_ifa); /* also remove from the IPv6 address chain(itojun&jinmei) */ oia = ia; - if (oia == (ia = in6_ifaddr)) - in6_ifaddr = ia->ia_next; + lck_mtx_lock(nd6_mutex); + if (oia == (ia = in6_ifaddrs)) + in6_ifaddrs = ia->ia_next; else { while (ia->ia_next && (ia->ia_next != oia)) ia = ia->ia_next; if (ia->ia_next) ia->ia_next = oia->ia_next; -#if DEBUG - else - printf("%s: didn't unlink in6ifaddr from " - "list\n", if_name(ifp)); -#endif + else { + nd6log((LOG_ERR, + "%s: didn't unlink in6ifaddr from " + "list\n", if_name(ifp))); + } } + lck_mtx_unlock(nd6_mutex); - _FREE(ia, M_IFADDR); - } - -#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined (__APPLE__) - /* leave from all multicast groups joined */ - for (in6m = LIST_FIRST(&in6_multihead); in6m; in6m = in6m_next) { - in6m_next = LIST_NEXT(in6m, in6m_entry); - if (in6m->in6m_ifp != ifp) - continue; - in6_delmulti(in6m); - in6m = NULL; + ifafree(&oia->ia_ifa); } -#endif + ifnet_lock_done(ifp); -#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined(__APPLE__) - /* cleanup multicast address kludge table, if there is any */ - in6_purgemkludge(ifp); -#endif - - /* remove neighbor management table */ + /* + * remove neighbor management table. we call it twice just to make + * sure we nuke everything. maybe we need just one call. + * XXX: since the first call did not release addresses, some prefixes + * might remain. We should call nd6_purge() again to release the + * prefixes after removing all addresses above. + * (Or can we just delay calling nd6_purge until at this point?) + */ nd6_purge(ifp); /* remove route to link-local allnodes multicast (ff02::1) */ @@ -849,14 +1000,75 @@ in6_ifdetach(ifp) sin6.sin6_family = AF_INET6; sin6.sin6_addr = in6addr_linklocal_allnodes; sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index); -#if !defined(__FreeBSD__) && !defined (__APPLE__) - if ((rt = rtalloc1((struct sockaddr *)&sin6, 0)) != NULL) -#else - if ((rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL)) != NULL) -#endif - { - rtrequest(RTM_DELETE, (struct sockaddr *)rt_key(rt), + lck_mtx_lock(rt_mtx); + rt = rtalloc1_locked((struct sockaddr *)&sin6, 0, 0UL); + if (rt && rt->rt_ifp == ifp) { + rtrequest_locked(RTM_DELETE, (struct sockaddr *)rt_key(rt), rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0); - rtfree(rt); + rtfree_locked(rt); + } + lck_mtx_unlock(rt_mtx); +} + +void +in6_get_tmpifid( + struct ifnet *ifp, + u_int8_t *retbuf, + const u_int8_t *baseid, + int generate) +{ + u_int8_t nullbuf[8]; + struct nd_ifinfo *ndi = &nd_ifinfo[ifp->if_index]; + + 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)); + + /* generate_tmp_ifid will update seedn and buf */ + (void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1, + ndi->randomid); } + bcopy(ndi->randomid, retbuf, 8); +} + +extern size_t nd_ifinfo_indexlim; +extern int ip6_use_tempaddr; +void +in6_tmpaddrtimer( + void *ignored_arg) +{ + int i; + struct nd_ifinfo *ndi; + u_int8_t nullbuf[8]; + int s = splnet(); + + timeout(in6_tmpaddrtimer, (caddr_t)0, + (ip6_temp_preferred_lifetime - ip6_desync_factor - + ip6_temp_regen_advance) * hz); + + if (ip6_use_tempaddr) { + + 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); + } + } + } + + splx(s); }