-/* $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.
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/socket.h>
+#include <sys/socketvar.h>
#include <sys/sockio.h>
#include <sys/kernel.h>
-#ifdef __bsdi__
-#include <crypto/md5.h>
-#elif defined(__OpenBSD__)
-#include <sys/md5k.h>
-#else
+#include <sys/syslog.h>
#include <sys/md5.h>
-#endif
+#include <kern/lock.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
-#ifndef __NetBSD__
#include <netinet/if_ether.h>
-#endif
+#include <netinet/in_pcb.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
+#include <netinet6/in6_var.h>
+#include <netinet6/in6_pcb.h>
#include <netinet6/in6_ifattach.h>
#include <netinet6/ip6_var.h>
#include <netinet6/nd6.h>
+#include <netinet6/scope6_var.h>
#include <net/net_osdep.h>
-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.
* 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;
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;
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;
_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);
/* 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) */
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);
}
projects / apple / xnu.git / blobdiff