#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/locks.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 <net/if_llatbl.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>
#include <dev/random/randomdev.h>
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
extern struct inpcbinfo udbinfo;
extern struct inpcbinfo ripcbinfo;
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 *);
static int
get_rand_iid(
__unused struct ifnet *ifp,
struct in6_addr *in6)
{
SHA1_CTX ctxt;
u_int8_t digest[SHA1_RESULTLEN];
size_t hostnlen;
bzero(&ctxt, sizeof(ctxt));
SHA1Init(&ctxt);
lck_mtx_lock(&hostname_lock);
hostnlen = strlen(hostname);
SHA1Update(&ctxt, hostname, hostnlen);
lck_mtx_unlock(&hostname_lock);
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
in6_generate_tmp_iid(
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++) {
getmicrotime(&tv);
val32 = RandomULong() ^ 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("%s: new randomized ID from: ", __func__);
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(info,
"%s: computed SHA1 value is zero.\n", __func__);
getmicrotime(&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_iid_from_hw(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:
case IFT_6LOWPAN:
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
in6_select_iid_from_all_hw(
struct ifnet *ifp0,
struct ifnet *altifp,
struct in6_addr *in6)
{
struct ifnet *ifp;
if (in6_iid_from_hw(ifp0, in6) == 0) {
nd6log(debug, "%s: IID derived from HW interface.\n",
if_name(ifp0));
goto success;
}
if (altifp && in6_iid_from_hw(altifp, in6) == 0) {
nd6log(debug, "%s: IID from alterate HW interface %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_iid_from_hw(ifp, in6) != 0) {
continue;
}
if (ND6_IFID_UNIVERSAL(in6)) {
nd6log(debug, "%s: borrowed IID from %s\n",
if_name(ifp0), if_name(ifp));
ifnet_head_done();
goto success;
}
}
ifnet_head_done();
if (get_rand_iid(ifp, in6) == 0) {
nd6log(debug, "%s: IID from PRNG.\n", if_name(ifp0));
goto success;
}
printf("%s: failed to get interface identifier\n", if_name(ifp0));
return -1;
success:
nd6log(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;
}
static int
in6_ifattach_linklocal(struct ifnet *ifp, struct in6_aliasreq *ifra)
{
struct in6_ifaddr *ia;
struct nd_prefix pr0, *pr;
int i, error;
VERIFY(ifra != NULL);
proto_plumb(PF_INET6, ifp);
error = in6_update_ifa(ifp, ifra, IN6_IFAUPDATE_DADDELAY, &ia);
if (error != 0) {
if (error != EAFNOSUPPORT) {
nd6log(info, "%s: failed to "
"configure a link-local address on %s "
"(errno=%d)\n",
__func__, if_name(ifp), error);
}
return EADDRNOTAVAIL;
}
VERIFY(ia != NULL);
bzero(&pr0, sizeof(pr0));
lck_mtx_init(&pr0.ndpr_lock, ifa_mtx_grp, ifa_mtx_attr);
pr0.ndpr_ifp = ifp;
pr0.ndpr_plen = (u_char)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, ND6_PREFIX_EXPIRY_UNSPEC)) == 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;
}
}
in6_post_msg(ifp, KEV_INET6_NEW_LL_ADDR, ia, NULL);
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;
struct in6_ifaddr *ia;
int error;
bzero(&ifra, sizeof(ifra));
strlcpy(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;
error = in6_update_ifa(ifp, &ifra, 0, &ia);
if (error != 0) {
nd6log(error,
"%s: failed to configure loopback address %s (error=%d)\n",
__func__, if_name(ifp), error);
VERIFY(ia == NULL);
return EADDRNOTAVAIL;
}
VERIFY(ia != NULL);
IFA_REMREF(&ia->ia_ifa);
return 0;
}
int
in6_nigroup(
struct ifnet *ifp,
const char *name,
size_t namelen,
struct in6_addr *in6)
{
const char *p;
u_char *q;
SHA1_CTX ctxt;
u_int8_t digest[SHA1_RESULTLEN];
size_t 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;
strlcpy(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;
in6->s6_addr8[12] = 0xff;
bcopy(digest, &in6->s6_addr8[13], 3);
if (in6_setscope(in6, ifp, NULL)) {
return -1;
}
return 0;
}
int
in6_domifattach(struct ifnet *ifp)
{
int error;
VERIFY(ifp != NULL);
error = proto_plumb(PF_INET6, ifp);
if (error != 0) {
if (error != EEXIST) {
log(LOG_ERR, "%s: proto_plumb returned %d if=%s\n",
__func__, error, if_name(ifp));
}
} else {
error = in6_ifattach_prelim(ifp);
if (error != 0) {
int errorx;
log(LOG_ERR,
"%s: in6_ifattach_prelim returned %d if=%s%d\n",
__func__, error, ifp->if_name, ifp->if_unit);
errorx = proto_unplumb(PF_INET6, ifp);
if (errorx != 0) {
log(LOG_ERR,
"%s: proto_unplumb returned %d if=%s%d\n",
__func__, errorx, ifp->if_name,
ifp->if_unit);
}
}
}
return error;
}
int
in6_ifattach_prelim(struct ifnet *ifp)
{
struct in6_ifextra *ext;
void **pbuf, *base;
int error = 0;
struct in6_ifaddr *ia6 = NULL;
VERIFY(ifp != NULL);
switch (ifp->if_type) {
#if IFT_STF
case IFT_STF:
goto skipmcast;
#endif
default:
break;
}
if ((ifp->if_flags & IFF_MULTICAST) == 0) {
nd6log0(info, "in6_ifattach: %s is not multicast capable, IPv6 not enabled\n",
if_name(ifp));
return EINVAL;
}
#if IFT_STF
skipmcast:
#endif
if (ifp->if_inet6data == NULL) {
ext = (struct in6_ifextra *)_MALLOC(in6_extra_bufsize, 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;
IN6_IFEXTRA(ifp)->ii_llt = in6_lltattach(ifp);
VERIFY(IS_P2ALIGNED(ifp->if_inet6data, sizeof(uint64_t)));
} else {
bzero(&IN6_IFEXTRA(ifp)->icmp6_ifstat,
sizeof(IN6_IFEXTRA(ifp)->icmp6_ifstat));
bzero(&IN6_IFEXTRA(ifp)->in6_ifstat,
sizeof(IN6_IFEXTRA(ifp)->in6_ifstat));
}
ia6 = in6ifa_ifpforlinklocal(ifp, 0);
if (ia6 == NULL) {
IN6_IFEXTRA(ifp)->netsig_len = 0;
bzero(&IN6_IFEXTRA(ifp)->netsig,
sizeof(IN6_IFEXTRA(ifp)->netsig));
bzero(IN6_IFEXTRA(ifp)->nat64_prefixes,
sizeof(IN6_IFEXTRA(ifp)->nat64_prefixes));
nd6_ifattach(ifp);
} else {
VERIFY(ND_IFINFO(ifp)->initialized);
IFA_REMREF(&ia6->ia_ifa);
ia6 = NULL;
}
scope6_ifattach(ifp);
if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
error = in6_ifattach_loopback(ifp);
if (error != 0) {
log(LOG_ERR, "%s: in6_ifattach_loopback returned %d\n",
__func__, error);
return error;
}
}
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;
}
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));
if (ifra0 != NULL) {
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(error, "%s: no IID 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 (in6_ifattach_linklocal(ifp, &ifra) != 0) {
nd6log(info,
"%s: %s could not attach link-local address.\n",
__func__, if_name(ifp));
}
return 0;
}
int
in6_ifattach_llcgareq(struct ifnet *ifp, struct in6_cgareq *llcgasr)
{
struct in6_aliasreq ifra;
struct in6_ifaddr *ia6 = NULL;
struct nd_ifinfo *ndi = NULL;
int error;
VERIFY(llcgasr != NULL);
error = in6_ifattach_prelim(ifp);
if (error != 0) {
return error;
}
if (!ip6_auto_linklocal) {
return 0;
}
if (nd6_send_opstate == ND6_SEND_OPMODE_DISABLED) {
return ENXIO;
}
ndi = ND_IFINFO(ifp);
VERIFY(ndi != NULL && ndi->initialized);
if ((ndi->flags & ND6_IFF_INSECURE) != 0) {
return ENXIO;
}
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(&llcgasr->cgar_cgaprep, llcgasr->cgar_collision_count,
&ifra.ifra_addr.sin6_addr, ifp)) {
in6_cga_node_unlock();
return EADDRNOTAVAIL;
}
in6_cga_node_unlock();
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 = llcgasr->cgar_lifetime.ia6t_pltime;
if (in6_ifattach_linklocal(ifp, &ifra) != 0) {
nd6log(info,
"%s: %s could not attach link-local address.\n",
__func__, if_name(ifp));
}
VERIFY(error == 0);
return error;
}
void
in6_ifdetach(struct ifnet *ifp)
{
struct in6_ifaddr *ia, *nia;
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);
if (LLTABLE6(ifp)) {
lltable_free(LLTABLE6(ifp));
}
lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
boolean_t from_begining = TRUE;
while (from_begining) {
from_begining = FALSE;
TAILQ_FOREACH(ia, &in6_ifaddrhead, ia6_link) {
if (ia->ia_ifa.ifa_ifp != ifp) {
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);
from_begining = TRUE;
break;
}
}
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 = 0;
lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
TAILQ_FOREACH(nia, &in6_ifaddrhead, ia6_link) {
if (ia == nia) {
TAILQ_REMOVE(&in6_ifaddrhead, ia, ia6_link);
unlinked = 1;
break;
}
}
lck_rw_done(&in6_ifaddr_rwlock);
if (unlinked) {
IFA_REMREF(ifa);
}
IFA_REMREF(ifa);
ifnet_lock_exclusive(ifp);
ifa = TAILQ_FIRST(&ifp->if_addrlist);
}
ifnet_lock_done(ifp);
routegenid_inet6_update();
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_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 = 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) in6_generate_tmp_iid(ndi->randomseed0, ndi->randomseed1,
ndi->randomid);
}
bcopy(ndi->randomid, retbuf, 8);
lck_mtx_unlock(&ndi->lock);
}
void
in6_tmpaddrtimer(void *arg)
{
#pragma unused(arg)
struct ifnet *ifp = NULL;
struct nd_ifinfo *ndi = NULL;
u_int8_t nullbuf[8];
timeout(in6_tmpaddrtimer, (caddr_t)0, (ip6_temp_preferred_lifetime -
ip6_desync_factor - ip6_temp_regen_advance) * hz);
bzero(nullbuf, sizeof(nullbuf));
ifnet_head_lock_shared();
for (ifp = ifnet_head.tqh_first; ifp;
ifp = ifp->if_link.tqe_next) {
ndi = ND_IFINFO(ifp);
if ((NULL == ndi) || (FALSE == ndi->initialized)) {
continue;
}
lck_mtx_lock(&ndi->lock);
if (bcmp(ndi->randomid, nullbuf, sizeof(nullbuf)) != 0) {
(void) in6_generate_tmp_iid(ndi->randomseed0,
ndi->randomseed1, ndi->randomid);
}
lck_mtx_unlock(&ndi->lock);
}
ifnet_head_done();
}