#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <libkern/crypto/sha1.h>
#include <libkern/OSAtomic.h>
#include <kern/lock.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <net/kpi_protocol.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
#include <netinet/in_pcb.h>
#include <netinet/icmp6.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>
#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;
#if IP6_AUTO_LINKLOCAL
int ip6_auto_linklocal = IP6_AUTO_LINKLOCAL;
#else
int ip6_auto_linklocal = 1;
#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 int in6_ifattach_loopback(struct ifnet *);
static int
get_rand_ifid(
__unused struct ifnet *ifp,
struct in6_addr *in6)
{
SHA1_CTX ctxt;
u_int8_t digest[SHA1_RESULTLEN];
int hostnlen = strlen(hostname);
#if 0
if (len < 3)
return -1;
#endif
bzero(&ctxt, sizeof(ctxt));
SHA1Init(&ctxt);
SHA1Update(&ctxt, hostname, hostnlen);
SHA1Final(digest, &ctxt);
bcopy(digest, &in6->s6_addr[8], 8);
in6->s6_addr[8] &= ~ND6_EUI64_GBIT;
in6->s6_addr[8] |= ND6_EUI64_UBIT;
ND6_EUI64_TO_IFID(in6);
return 0;
}
static int
generate_tmp_ifid(
u_int8_t *seed0,
const u_int8_t *seed1,
u_int8_t *ret)
{
SHA1_CTX ctxt;
u_int8_t seed[16], nullbuf[8], digest[SHA1_RESULTLEN];
u_int32_t val32;
struct timeval tv;
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);
}
bcopy(seed1, &seed[8], 8);
if (0) {
int i;
printf("generate_tmp_ifid: new randomized ID from: ");
for (i = 0; i < 16; i++)
printf("%02x", seed[i]);
printf(" ");
}
bzero(&ctxt, sizeof(ctxt));
SHA1Init(&ctxt);
SHA1Update(&ctxt, seed, sizeof(seed));
SHA1Final(digest, &ctxt);
bcopy(digest, ret, 8);
ret[0] &= ~ND6_EUI64_UBIT;
if (bcmp(nullbuf, ret, sizeof(nullbuf)) == 0) {
nd6log((LOG_INFO,
"generate_tmp_ifid: computed SHA1 value is zero.\n"));
microtime(&tv);
val32 = random() ^ tv.tv_usec;
val32 = 1 + (val32 % (0xffffffff - 1));
}
bcopy(&digest[8], seed0, 8);
if (0) {
int i;
printf("to: ");
for (i = 0; i < 16; i++)
printf("%02x", digest[i]);
printf("\n");
}
return 0;
}
int
in6_get_hw_ifid(
struct ifnet *ifp,
struct in6_addr *in6)
{
struct ifaddr *ifa = NULL;
struct sockaddr_dl *sdl;
u_int8_t *addr;
size_t addrlen;
static u_int8_t allzero[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
static u_int8_t allone[8] =
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
int err = -1;
ifnet_lock_shared(ifp);
ifa = ifp->if_lladdr;
sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr;
if (sdl->sdl_alen == 0) {
ifnet_lock_done(ifp);
return (-1);
}
IFA_ADDREF(ifa);
ifnet_lock_done(ifp);
IFA_LOCK(ifa);
addr = (u_int8_t *) LLADDR(sdl);
addrlen = sdl->sdl_alen;
switch (ifp->if_type) {
case IFT_ETHER:
case IFT_FDDI:
case IFT_ISO88025:
case IFT_ATM:
case IFT_IEEE1394:
case IFT_L2VLAN:
case IFT_IEEE8023ADLAG:
#if IFT_IEEE80211
case IFT_IEEE80211:
#endif
case IFT_BRIDGE:
if (addrlen > 8)
addrlen = 8;
if (addrlen != 8 && addrlen != 6)
goto done;
if (bcmp(addr, allzero, addrlen) == 0)
goto done;
if (bcmp(addr, allone, addrlen) == 0)
goto done;
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)
goto done;
if (!addr[0])
goto done;
bzero(&in6->s6_addr[8], 8);
in6->s6_addr[15] = addr[0];
in6->s6_addr[8] &= ~ND6_EUI64_GBIT;
in6->s6_addr[8] |= ND6_EUI64_UBIT;
break;
case IFT_GIF:
#if IFT_STF
case IFT_STF:
#endif
goto done;
case IFT_CELLULAR:
goto done;
default:
goto done;
}
if (ND6_EUI64_GROUP(in6))
goto done;
ND6_EUI64_TO_IFID(in6);
if ((in6->s6_addr[8] & ~(ND6_EUI64_GBIT | ND6_EUI64_UBIT)) == 0x00 &&
bcmp(&in6->s6_addr[9], allzero, 7) == 0) {
goto done;
}
err = 0;
done:
if (IFA_REMREF_LOCKED(ifa) == NULL) {
panic("%s: unexpected (missing) refcnt ifa=%p", __func__, ifa);
}
IFA_UNLOCK(ifa);
return (err);
}
static int
get_ifid(
struct ifnet *ifp0,
struct ifnet *altifp,
struct in6_addr *in6)
{
struct ifnet *ifp;
if (in6_get_hw_ifid(ifp0, in6) == 0) {
nd6log((LOG_DEBUG, "%s: got interface identifier from itself\n",
if_name(ifp0)));
goto success;
}
if (altifp && in6_get_hw_ifid(altifp, in6) == 0) {
nd6log((LOG_DEBUG, "%s: got interface identifier from %s\n",
if_name(ifp0), if_name(altifp)));
goto success;
}
ifnet_head_lock_shared();
TAILQ_FOREACH(ifp, &ifnet_head, if_list) {
if (ifp == ifp0)
continue;
if (in6_get_hw_ifid(ifp, in6) != 0)
continue;
if (ND6_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();
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,
struct in6_aliasreq *ifra_passed)
{
struct in6_ifaddr *ia;
struct in6_aliasreq ifra;
struct nd_prefix pr0, *pr;
int i, error;
bzero(&ifra, sizeof(ifra));
proto_plumb(PF_INET6, ifp);
strncpy(ifra.ifra_name, if_name(ifp), sizeof(ifra.ifra_name));
if ((ifp->if_eflags & IFEF_NOAUTOIPV6LL) != 0 &&
ifra_passed != NULL)
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;
ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
if ((error = in6_update_ifa(ifp, &ifra, NULL,
IN6_IFAUPDATE_DADDELAY, M_WAITOK)) != 0) {
if (error != EAFNOSUPPORT)
nd6log((LOG_NOTICE, "in6_ifattach_linklocal: failed to "
"configure a link-local address on %s "
"(errno=%d)\n",
if_name(ifp), error));
return (EADDRNOTAVAIL);
}
ia = in6ifa_ifpforlinklocal(ifp, 0);
#if DIAGNOSTIC
if (!ia) {
panic("ia == NULL in in6_ifattach_linklocal");
}
#endif
bzero(&pr0, sizeof(pr0));
lck_mtx_init(&pr0.ndpr_lock, ifa_mtx_grp, ifa_mtx_attr);
pr0.ndpr_ifp = ifp;
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;
for (i = 0; i < 4; i++) {
pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
in6mask64.s6_addr32[i];
}
pr0.ndpr_raf_onlink = 1;
pr0.ndpr_raf_auto = 1;
pr0.ndpr_vltime = ND6_INFINITE_LIFETIME;
pr0.ndpr_pltime = ND6_INFINITE_LIFETIME;
pr0.ndpr_stateflags |= NDPRF_STATIC;
if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
if ((error = nd6_prelist_add(&pr0, NULL, &pr, TRUE)) != 0) {
IFA_REMREF(&ia->ia_ifa);
lck_mtx_destroy(&pr0.ndpr_lock, ifa_mtx_grp);
return(error);
}
}
if (ia != NULL) {
in6_post_msg(ifp, KEV_INET6_NEW_LL_ADDR, ia);
IFA_REMREF(&ia->ia_ifa);
}
if (pr != NULL)
NDPR_REMREF(pr);
lck_mtx_destroy(&pr0.ndpr_lock, ifa_mtx_grp);
return 0;
}
static int
in6_ifattach_loopback(
struct ifnet *ifp)
{
struct in6_aliasreq ifra;
int error;
bzero(&ifra, sizeof(ifra));
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;
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;
ifra.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
ifra.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
ifra.ifra_flags |= IN6_IFF_NODAD;
ifra.ifra_flags |= IN6_IFF_NOPFX;
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));
return (EADDRNOTAVAIL);
}
return 0;
}
int
in6_nigroup(
struct ifnet *ifp,
const char *name,
int namelen,
struct in6_addr *in6)
{
const char *p;
u_char *q;
SHA1_CTX ctxt;
u_int8_t digest[SHA1_RESULTLEN];
char l;
char n[64];
if (!namelen || !name)
return -1;
p = name;
while (p && *p && *p != '.' && p - name < namelen)
p++;
if (p - name > sizeof(n) - 1)
return -1;
l = p - name;
strncpy(n, name, l);
n[(int)l] = '\0';
for (q = (u_char *) n; *q; q++) {
if ('A' <= *q && *q <= 'Z')
*q = *q - 'A' + 'a';
}
bzero(&ctxt, sizeof(ctxt));
SHA1Init(&ctxt);
SHA1Update(&ctxt, &l, sizeof(l));
SHA1Update(&ctxt, n, l);
SHA1Final(digest, &ctxt);
bzero(in6, sizeof(*in6));
in6->s6_addr16[0] = IPV6_ADDR_INT16_MLL;
in6->s6_addr8[11] = 2;
bcopy(digest, &in6->s6_addr32[3], sizeof(in6->s6_addr32[3]));
if (in6_setscope(in6, ifp, NULL))
return (-1);
return 0;
}
int
in6_domifattach(struct ifnet *ifp)
{
int error = 0;
if ((error = proto_plumb(PF_INET6, ifp))) {
if (error != EEXIST)
log(LOG_ERR, "%s: proto_plumb returned %d if=%s%d\n",
__func__, error, ifp->if_name, ifp->if_unit);
} else {
nd6_ifattach(ifp);
scope6_ifattach(ifp);
}
return (error);
}
int
in6_ifattach(
struct ifnet *ifp,
struct ifnet *altifp,
struct in6_aliasreq *ifra)
{
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);
if (in6_ifstat == NULL || icmp6_ifstat == NULL ||
if_index >= if_indexlim) {
while (if_index >= if_indexlim)
if_indexlim <<= 1;
}
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);
if ((error = nd6_ifattach(ifp)) != 0)
return error;
if ((error = scope6_ifattach(ifp)) != 0)
return error;
switch (ifp->if_type) {
#if IFT_STF
case IFT_STF:
goto statinit;
#endif
default:
break;
}
if ((ifp->if_flags & IFF_MULTICAST) == 0) {
nd6log((LOG_INFO, "in6_ifattach: ",
"%s is not multicast capable, IPv6 not enabled\n",
if_name(ifp)));
return EINVAL;
}
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);
}
}
}
if (ip6_auto_linklocal) {
ia = in6ifa_ifpforlinklocal(ifp, 0);
if (ia == NULL) {
if (in6_ifattach_linklocal(ifp, altifp, ifra) == 0) {
} else {
nd6log((LOG_INFO, "in6_ifattach: %s failed to "
"attach a linklocal address.\n",
if_name(ifp)));
}
} else {
IFA_REMREF(&ia->ia_ifa);
}
}
#if IFT_STF
statinit:
#endif
if (in6_maxmtu < ifp->if_mtu)
in6_maxmtu = ifp->if_mtu;
return 0;
}
void
in6_ifdetach(struct ifnet *ifp)
{
struct in6_ifaddr *ia, *oia;
struct ifaddr *ifa;
struct rtentry *rt;
struct sockaddr_in6 sin6;
struct in6_multi_mship *imm;
int unlinked;
lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED);
nd6_purge(ifp);
lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
ia = in6_ifaddrs;
while (ia != NULL) {
if (ia->ia_ifa.ifa_ifp != ifp) {
ia = ia->ia_next;
continue;
}
IFA_ADDREF(&ia->ia_ifa);
lck_rw_done(&in6_ifaddr_rwlock);
in6_purgeaddr(&ia->ia_ifa);
IFA_REMREF(&ia->ia_ifa);
lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
ia = in6_ifaddrs;
}
lck_rw_done(&in6_ifaddr_rwlock);
ifnet_lock_exclusive(ifp);
ifa = TAILQ_FIRST(&ifp->if_addrlist);
while (ifa != NULL) {
IFA_LOCK(ifa);
if (ifa->ifa_addr->sa_family != AF_INET6 ||
!IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->
sin6_addr)) {
IFA_UNLOCK(ifa);
ifa = TAILQ_NEXT(ifa, ifa_list);
continue;
}
ia = (struct in6_ifaddr *)ifa;
IFA_ADDREF_LOCKED(ifa);
if_detach_ifa(ifp, ifa);
IFA_UNLOCK(ifa);
ifnet_lock_done(ifp);
IFA_LOCK(ifa);
while ((imm = ia->ia6_memberships.lh_first) != NULL) {
LIST_REMOVE(imm, i6mm_chain);
IFA_UNLOCK(ifa);
in6_leavegroup(imm);
IFA_LOCK(ifa);
}
if (ia->ia_flags & IFA_ROUTE) {
IFA_UNLOCK(ifa);
rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0, 0);
if (rt != NULL) {
(void) rtrequest(RTM_DELETE,
(struct sockaddr *)&ia->ia_addr,
(struct sockaddr *)&ia->ia_addr,
(struct sockaddr *)&ia->ia_prefixmask,
rt->rt_flags, (struct rtentry **)0);
rtfree(rt);
}
} else {
IFA_UNLOCK(ifa);
}
unlinked = 1;
oia = ia;
lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
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;
} else {
nd6log((LOG_ERR,
"%s: didn't unlink in6ifaddr from "
"list\n", if_name(ifp)));
unlinked = 0;
}
}
lck_rw_done(&in6_ifaddr_rwlock);
ifa = &oia->ia_ifa;
if (unlinked)
IFA_REMREF(ifa);
IFA_REMREF(ifa);
ifnet_lock_exclusive(ifp);
ifa = TAILQ_FIRST(&ifp->if_addrlist);
}
ifnet_lock_done(ifp);
nd6_purge(ifp);
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) {
rt->rt_flags |= RTF_CONDEMNED;
RT_UNLOCK(rt);
(void) rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
rt_mask(rt), rt->rt_flags, 0);
} else {
RT_UNLOCK(rt);
}
rtfree(rt);
}
}
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;
lck_rw_lock_shared(nd_if_rwlock);
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) {
generate = 1;
}
if (generate) {
bcopy(baseid, ndi->randomseed1, sizeof(ndi->randomseed1));
(void)generate_tmp_ifid(ndi->randomseed0, ndi->randomseed1,
ndi->randomid);
}
bcopy(ndi->randomid, retbuf, 8);
lck_mtx_unlock(&ndi->lock);
lck_rw_done(nd_if_rwlock);
}
void
in6_tmpaddrtimer(void *arg)
{
#pragma unused(arg)
int i;
struct nd_ifinfo *ndi;
u_int8_t nullbuf[8];
timeout(in6_tmpaddrtimer, (caddr_t)0,
(ip6_temp_preferred_lifetime - ip6_desync_factor -
ip6_temp_regen_advance) * hz);
lck_rw_lock_shared(nd_if_rwlock);
bzero(nullbuf, sizeof(nullbuf));
for (i = 1; i < if_index + 1; i++) {
if (!nd_ifinfo || i >= nd_ifinfo_indexlim)
break;
ndi = &nd_ifinfo[i];
if (!ndi->initialized)
continue;
lck_mtx_lock(&ndi->lock);
if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
(void)generate_tmp_ifid(ndi->randomseed0,
ndi->randomseed1,
ndi->randomid);
}
lck_mtx_unlock(&ndi->lock);
}
lck_rw_done(nd_if_rwlock);
}