/*
- * Copyright (c) 2003-2012 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
* 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,
* 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.
#include <sys/syslog.h>
#include <libkern/crypto/sha1.h>
#include <libkern/OSAtomic.h>
-#include <kern/lock.h>
+#include <kern/locks.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <netinet6/scope6_var.h>
#include <net/net_osdep.h>
+#include <dev/random/randomdev.h>
-#define IN6_IFSTAT_ALLOC_SIZE \
- sizeof(void *) + sizeof(struct in6_ifstat) + sizeof(uint64_t)
-#define ICMP6_IFSTAT_ALLOC_SIZE \
- sizeof(void *) + sizeof(struct icmp6_ifstat) + sizeof(uint64_t)
-
-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;
int ip6_auto_linklocal = 1; /* enable by default */
#endif
-int loopattach6_done = 0;
-
extern struct inpcbinfo udbinfo;
extern struct inpcbinfo ripcbinfo;
-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 *);
-int in6_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 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);
+
+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 *);
/*
* 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 */
{
u_int8_t digest[SHA1_RESULTLEN];
int hostnlen = strlen(hostname);
-#if 0
- /* we need at least several letters as seed for ifid */
- if (len < 3)
- return -1;
-#endif
-
/* generate 8 bytes of pseudo-random value. */
- bzero(&ctxt, sizeof(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. */
/* convert EUI64 into IPv6 interface identifier */
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)
struct timeval tv;
/* If there's no history, start with a random seed. */
- bzero(nullbuf, sizeof(nullbuf));
- if (bcmp(nullbuf, seed0, sizeof(nullbuf)) == 0) {
+ 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);
/* 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));
+ bzero(&ctxt, sizeof (ctxt));
SHA1Init(&ctxt);
- SHA1Update(&ctxt, seed, sizeof(seed));
+ SHA1Update(&ctxt, seed, sizeof (seed));
SHA1Final(digest, &ctxt);
/*
* 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) {
+ if (bcmp(nullbuf, ret, sizeof (nullbuf)) == 0) {
nd6log((LOG_INFO,
- "generate_tmp_ifid: computed SHA1 value is zero.\n"));
+ "%s: computed SHA1 value is zero.\n", __func__));
- microtime(&tv);
+ getmicrotime(&tv);
val32 = random() ^ tv.tv_usec;
val32 = 1 + (val32 % (0xffffffff - 1));
}
*/
bcopy(&digest[8], seed0, 8);
- if (0) { /* for debugging purposes only */
+ if ((0)) { /* for debugging purposes only */
int i;
printf("to: ");
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
*/
int
-in6_get_hw_ifid(
- struct ifnet *ifp,
- struct in6_addr *in6) /* upper 64bits are preserved */
+in6_iid_from_hw(struct ifnet *ifp, struct in6_addr *in6)
{
struct ifaddr *ifa = NULL;
struct sockaddr_dl *sdl;
/*
* due to insufficient bitwidth, we mark it local.
*/
- in6->s6_addr[8] &= ~ND6_EUI64_GBIT; /* g bit to "individual" */
- in6->s6_addr[8] |= ND6_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:
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.
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] & ~(ND6_EUI64_GBIT | ND6_EUI64_UBIT)) == 0x00 &&
}
/*
- * 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.
*
- * altifp - secondary EUI64 source
+ * 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)
struct ifnet *ifp;
/* first, try to get it from the interface itself */
- if (in6_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 && in6_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;
}
TAILQ_FOREACH(ifp, &ifnet_head, if_list) {
if (ifp == ifp0)
continue;
- if (in6_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 (ND6_IFID_UNIVERSAL(in6)) {
- nd6log((LOG_DEBUG,
- "%s: borrow interface identifier from %s\n",
+ nd6log((LOG_DEBUG, "%s: borrowed IID 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)));
+ 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_eflags & IFEF_NOAUTOIPV6LL) != 0 &&
- ifra_passed != NULL) /* interface 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);
- 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 {
- if (get_ifid(ifp, altifp, &ifra.ifra_addr.sin6_addr) != 0) {
- nd6log((LOG_ERR,
- " %s: no ifid available\n", if_name(ifp)));
- return EADDRNOTAVAIL;
- }
- }
- }
- if (in6_setscope(&ifra.ifra_addr.sin6_addr, ifp, NULL))
- return (EADDRNOTAVAIL);
-
- 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;
-
- /*
- * Now call in6_update_ifa() to do a bunch of procedures to configure
- * a link-local address. We can set the 3rd argument to NULL, 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,
- IN6_IFAUPDATE_DADDELAY, 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
* suppress it. (jinmei@kame.net 20010130)
*/
if (error != EAFNOSUPPORT)
- nd6log((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));
+ __func__, if_name(ifp), error));
return (EADDRNOTAVAIL);
}
+ VERIFY(ia != NULL);
- ia = in6ifa_ifpforlinklocal(ifp, 0); /* ia must not be NULL */
-#if DIAGNOSTIC
- if (!ia) {
- panic("ia == NULL in in6_ifattach_linklocal");
- /*NOTREACHED*/
- }
-#endif
/*
* Make the link-local prefix (fe80::%link/64) as on-link.
* Since we'd like to manage prefixes separately from addresses,
* 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] &=
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);
+ return (error);
}
}
- if (ia != NULL) {
- in6_post_msg(ifp, KEV_INET6_NEW_LL_ADDR, ia);
- IFA_REMREF(&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_REMREF(pr);
lck_mtx_destroy(&pr0.ndpr_lock, ifa_mtx_grp);
-
- return 0;
+ return (0);
}
static int
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;
* 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;
/* 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, M_WAITOK)) != 0) {
- nd6log((LOG_ERR, "in6_ifattach_loopback: failed to configure "
- "the loopback address on %s (errno=%d)\n",
- if_name(ifp), error));
+ /* 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.
*/
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));
+ /* generate 16 bytes of pseudo-random value. */
+ bzero(&ctxt, sizeof (ctxt));
SHA1Init(&ctxt);
- SHA1Update(&ctxt, &l, sizeof(l));
+ SHA1Update(&ctxt, &l, sizeof (l));
SHA1Update(&ctxt, n, l);
SHA1Final(digest, &ctxt);
- bzero(in6, sizeof(*in6));
+ 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);
}
int
in6_domifattach(struct ifnet *ifp)
{
- int error = 0;
+ int error;
+
+ VERIFY(ifp != NULL);
- if ((error = proto_plumb(PF_INET6, ifp))) {
+ error = proto_plumb(PF_INET6, ifp);
+ if (error != 0) {
if (error != EEXIST)
- log(LOG_ERR, "%s: proto_plumb returned %d if=%s%d\n",
- __func__, error, ifp->if_name, ifp->if_unit);
+ log(LOG_ERR, "%s: proto_plumb returned %d if=%s\n",
+ __func__, error, if_name(ifp));
} else {
- nd6_ifattach(ifp);
- scope6_ifattach(ifp);
+ 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);
+ }
}
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;
- struct in6_addr in6;
- int error;
- void *buf;
-
- lck_rw_lock_exclusive(&in6_ifs_rwlock);
- /*
- * 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;
- }
-
- /* 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|M_ZERO);
- if (q == NULL) {
- lck_rw_done(&in6_ifs_rwlock);
- return ENOBUFS;
- }
- 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 **)(void *)q;
- in6_ifstatmax = if_indexlim;
- }
-
- if (in6_ifstat[ifp->if_index] == NULL) {
- buf = _MALLOC(IN6_IFSTAT_ALLOC_SIZE, M_IFADDR, M_WAITOK);
- if (buf == NULL) {
- lck_rw_done(&in6_ifs_rwlock);
- return ENOBUFS;
- }
- bzero(buf, IN6_IFSTAT_ALLOC_SIZE);
- in6_ifstat[ifp->if_index] = (struct in6_ifstat *)
- P2ROUNDUP((intptr_t)buf + sizeof(void *), sizeof(uint64_t));
- VERIFY(IS_P2ALIGNED(in6_ifstat[ifp->if_index], sizeof(uint64_t)));
- }
- lck_rw_done(&in6_ifs_rwlock);
-
- lck_rw_lock_exclusive(&icmp6_ifs_rwlock);
- 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|M_ZERO);
- if (q == NULL) {
- lck_rw_done(&icmp6_ifs_rwlock);
- return ENOBUFS;
- }
- 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 **)(void *)q;
- icmp6_ifstatmax = if_indexlim;
- }
-
- if (icmp6_ifstat[ifp->if_index] == NULL) {
- buf = _MALLOC(ICMP6_IFSTAT_ALLOC_SIZE, M_IFADDR, M_WAITOK);
- if (buf == NULL) {
- lck_rw_done(&icmp6_ifs_rwlock);
- return ENOBUFS;
- }
- bzero(buf, ICMP6_IFSTAT_ALLOC_SIZE);
- icmp6_ifstat[ifp->if_index] = (struct icmp6_ifstat *)
- P2ROUNDUP((intptr_t)buf + sizeof(void *), sizeof(uint64_t));
- VERIFY(IS_P2ALIGNED(icmp6_ifstat[ifp->if_index], sizeof(uint64_t)));
- }
- lck_rw_done(&icmp6_ifs_rwlock);
-
- /* 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:
* 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) {
nd6log((LOG_INFO, "in6_ifattach: ",
- "%s is not multicast capable, IPv6 not enabled\n",
+ "%s is not multicast capable, IPv6 not enabled\n",
if_name(ifp)));
- return EINVAL;
+ 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) {
- struct in6_ifaddr *ia6 = NULL;
- if (!OSCompareAndSwap(0, 1, (UInt32 *)&loopattach6_done)) {
- in6 = in6addr_loopback;
- if ((ia6 = in6ifa_ifpwithaddr(ifp, &in6)) == NULL) {
- if (in6_ifattach_loopback(ifp) != 0) {
- OSCompareAndSwap(1, 0, (UInt32 *)&loopattach6_done);
- return EINVAL;
- }
- }
- else {
- IFA_REMREF(&ia6->ia_ifa);
- }
+ 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 {
- nd6log((LOG_INFO, "in6_ifattach: %s failed to "
- "attach a linklocal address.\n",
+ 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 {
+ 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)));
- /* failed to assign linklocal address. bark? */
+ return (EADDRNOTAVAIL);
}
- } else {
- IFA_REMREF(&ia->ia_ifa);
}
}
-#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;
- return 0;
+ /* 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);
+
+ 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);
}
/*
/*
* 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.
+ * that we lost the race, since in6_ifaddr_rwlock was
+ * momentarily dropped above.
*/
if (unlinked)
IFA_REMREF(ifa);
}
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.
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
}
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;
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) {
+ 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);
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);
+ 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));
+ bzero(nullbuf, sizeof (nullbuf));
for (i = 1; i < if_index + 1; i++) {
if (!nd_ifinfo || i >= nd_ifinfo_indexlim)
break;
if (!ndi->initialized)
continue;
lck_mtx_lock(&ndi->lock);
- if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
+ 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);
+ (void) in6_generate_tmp_iid(ndi->randomseed0,
+ ndi->randomseed1, ndi->randomid);
}
lck_mtx_unlock(&ndi->lock);
}
projects / apple / xnu.git / blobdiff