#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockio.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/kern_event.h>
#include <kern/lock.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
#ifndef SCOPEDROUTING
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#endif
#include <netinet6/nd6.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/mld6_var.h>
#include <netinet6/ip6_mroute.h>
#include <netinet6/in6_ifattach.h>
#include <netinet6/scope6_var.h>
#ifndef SCOPEDROUTING
#include <netinet6/in6_pcb.h>
#endif
#include <net/net_osdep.h>
#ifndef __APPLE__
MALLOC_DEFINE(M_IPMADDR, "in6_multi", "internet multicast address");
#endif
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
const struct in6_addr in6addr_nodelocal_allnodes =
IN6ADDR_NODELOCAL_ALLNODES_INIT;
const struct in6_addr in6addr_linklocal_allnodes =
IN6ADDR_LINKLOCAL_ALLNODES_INIT;
const struct in6_addr in6addr_linklocal_allrouters =
IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
const struct in6_addr in6mask0 = IN6MASK0;
const struct in6_addr in6mask32 = IN6MASK32;
const struct in6_addr in6mask64 = IN6MASK64;
const struct in6_addr in6mask96 = IN6MASK96;
const struct in6_addr in6mask128 = IN6MASK128;
const struct sockaddr_in6 sa6_any = {sizeof(sa6_any), AF_INET6,
0, 0, IN6ADDR_ANY_INIT, 0};
static int in6_lifaddr_ioctl(struct socket *, u_long, caddr_t,
struct ifnet *, struct proc *);
static int in6_ifinit(struct ifnet *, struct in6_ifaddr *,
struct sockaddr_in6 *, int);
static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *, int);
struct in6_multihead in6_multihead;
extern struct lck_mtx_t *nd6_mutex;
static void
in6_ifloop_request(int cmd, struct ifaddr *ifa)
{
struct sockaddr_in6 all1_sa;
struct rtentry *nrt = NULL;
int e;
bzero(&all1_sa, sizeof(all1_sa));
all1_sa.sin6_family = AF_INET6;
all1_sa.sin6_len = sizeof(struct sockaddr_in6);
all1_sa.sin6_addr = in6mask128;
e = rtrequest_locked(cmd, ifa->ifa_addr, ifa->ifa_addr,
(struct sockaddr *)&all1_sa,
RTF_UP|RTF_HOST|RTF_LLINFO, &nrt);
if (e != 0) {
log(LOG_ERR, "in6_ifloop_request: "
"%s operation failed for %s (errno=%d)\n",
cmd == RTM_ADD ? "ADD" : "DELETE",
ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr),
e);
}
if (cmd == RTM_ADD && nrt && ifa != nrt->rt_ifa) {
rtsetifa(nrt, ifa);
}
if (nrt) {
rt_newaddrmsg(cmd, ifa, e, nrt);
if (cmd == RTM_DELETE) {
if (nrt->rt_refcnt <= 0) {
rtref(nrt);
rtfree_locked(nrt);
}
} else {
rtunref(nrt);
}
}
}
static void
in6_ifaddloop(struct ifaddr *ifa)
{
struct rtentry *rt;
lck_mtx_lock(rt_mtx);
rt = rtalloc1_locked(ifa->ifa_addr, 0, 0);
if (rt == NULL || (rt->rt_flags & RTF_HOST) == 0 ||
(rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0)
in6_ifloop_request(RTM_ADD, ifa);
if (rt)
rt->rt_refcnt--;
lck_mtx_unlock(rt_mtx);
}
static void
in6_ifremloop(struct ifaddr *ifa, int locked)
{
struct in6_ifaddr *ia;
struct rtentry *rt;
int ia_count = 0;
if (!locked)
lck_mtx_lock(nd6_mutex);
for (ia = in6_ifaddrs; ia; ia = ia->ia_next) {
if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) {
ia_count++;
if (ia_count > 1)
break;
}
}
if (!locked)
lck_mtx_unlock(nd6_mutex);
if (ia_count == 1) {
lck_mtx_lock(rt_mtx);
rt = rtalloc1_locked(ifa->ifa_addr, 0, 0);
if (rt != NULL && (rt->rt_flags & RTF_HOST) != 0 &&
(rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) {
rt->rt_refcnt--;
in6_ifloop_request(RTM_DELETE, ifa);
}
lck_mtx_unlock(rt_mtx);
}
}
int
in6_ifindex2scopeid(idx)
int idx;
{
struct ifnet *ifp;
struct ifaddr *ifa;
struct sockaddr_in6 *sin6;
if (idx < 0 || if_index < idx)
return -1;
ifnet_head_lock_shared();
ifp = ifindex2ifnet[idx];
ifnet_head_done();
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
ifnet_lock_done(ifp);
return sin6->sin6_scope_id & 0xffff;
}
}
ifnet_lock_done(ifp);
return -1;
}
int
in6_mask2len(mask, lim0)
struct in6_addr *mask;
u_char *lim0;
{
int x = 0, y;
u_char *lim = lim0, *p;
if (lim0 == NULL ||
lim0 - (u_char *)mask > sizeof(*mask))
lim = (u_char *)mask + sizeof(*mask);
for (p = (u_char *)mask; p < lim; x++, p++) {
if (*p != 0xff)
break;
}
y = 0;
if (p < lim) {
for (y = 0; y < 8; y++) {
if ((*p & (0x80 >> y)) == 0)
break;
}
}
if (p < lim) {
if (y != 0 && (*p & (0x00ff >> y)) != 0)
return(-1);
for (p = p + 1; p < lim; p++)
if (*p != 0)
return(-1);
}
return x * 8 + y;
}
void
in6_len2mask(mask, len)
struct in6_addr *mask;
int len;
{
int i;
bzero(mask, sizeof(*mask));
for (i = 0; i < len / 8; i++)
mask->s6_addr8[i] = 0xff;
if (len % 8)
mask->s6_addr8[i] = (0xff00 >> (len % 8)) & 0xff;
}
#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
#define ia62ifa(ia6) (&((ia6)->ia_ifa))
int
in6_control(so, cmd, data, ifp, p)
struct socket *so;
u_long cmd;
caddr_t data;
struct ifnet *ifp;
struct proc *p;
{
struct in6_ifreq *ifr = (struct in6_ifreq *)data;
struct in6_ifaddr *ia = NULL;
struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
int privileged, error = 0;
int index;
struct timeval timenow;
getmicrotime(&timenow);
privileged = 0;
#ifdef __APPLE__
if (p == NULL || !proc_suser(p))
#else
if (p == NULL || !suser(p))
#endif
privileged++;
switch (cmd) {
case SIOCGETSGCNT_IN6:
case SIOCGETMIFCNT_IN6:
return (mrt6_ioctl(cmd, data));
}
if (ifp == NULL)
return(EOPNOTSUPP);
switch (cmd) {
case SIOCAUTOCONF_START:
case SIOCAUTOCONF_STOP:
case SIOCLL_START:
case SIOCLL_STOP:
case SIOCPROTOATTACH_IN6:
case SIOCPROTODETACH_IN6:
if (!privileged)
return(EPERM);
break;
case SIOCSNDFLUSH_IN6:
case SIOCSPFXFLUSH_IN6:
case SIOCSRTRFLUSH_IN6:
case SIOCSDEFIFACE_IN6:
case SIOCSIFINFO_FLAGS:
if (!privileged)
return(EPERM);
case OSIOCGIFINFO_IN6:
case SIOCGIFINFO_IN6:
case SIOCGDRLST_IN6:
case SIOCGPRLST_IN6:
case SIOCGNBRINFO_IN6:
case SIOCGDEFIFACE_IN6:
return(nd6_ioctl(cmd, data, ifp));
}
switch (cmd) {
case SIOCSIFPREFIX_IN6:
case SIOCDIFPREFIX_IN6:
case SIOCAIFPREFIX_IN6:
case SIOCCIFPREFIX_IN6:
case SIOCSGIFPREFIX_IN6:
case SIOCGIFPREFIX_IN6:
log(LOG_NOTICE,
"prefix ioctls are now invalidated. "
"please use ifconfig.\n");
return(EOPNOTSUPP);
}
switch (cmd) {
case SIOCSSCOPE6:
if (!privileged)
return(EPERM);
return(scope6_set(ifp, ifr->ifr_ifru.ifru_scope_id));
break;
case SIOCGSCOPE6:
return(scope6_get(ifp, ifr->ifr_ifru.ifru_scope_id));
break;
case SIOCGSCOPE6DEF:
return(scope6_get_default(ifr->ifr_ifru.ifru_scope_id));
break;
}
switch (cmd) {
case SIOCALIFADDR:
case SIOCDLIFADDR:
if (!privileged)
return(EPERM);
case SIOCGLIFADDR:
return in6_lifaddr_ioctl(so, cmd, data, ifp, p);
}
#ifdef __APPLE__
switch (cmd) {
case SIOCAUTOCONF_START:
ifnet_lock_exclusive(ifp);
ifp->if_eflags |= IFEF_ACCEPT_RTADVD;
ifnet_lock_done(ifp);
return (0);
case SIOCAUTOCONF_STOP:
{
struct in6_ifaddr *ia, *nia = NULL;
ifnet_lock_exclusive(ifp);
ifp->if_eflags &= ~IFEF_ACCEPT_RTADVD;
ifnet_lock_done(ifp);
in6_purgeprefix(ifp);
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;
if (ia->ia6_flags & IN6_IFF_AUTOCONF)
in6_purgeaddr(&ia->ia_ifa, 1);
}
lck_mtx_unlock(nd6_mutex);
return (0);
}
case SIOCLL_START:
if (ifp->if_type == IFT_PPP && ifra->ifra_addr.sin6_family == AF_INET6 &&
ifra->ifra_dstaddr.sin6_family == AF_INET6)
in6_if_up(ifp, ifra);
else
in6_if_up(ifp, 0);
return(0);
case SIOCLL_STOP:
{
struct in6_ifaddr *ia, *nia = NULL;
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;
if (IN6_IS_ADDR_LINKLOCAL(&ia->ia_addr.sin6_addr))
in6_purgeaddr(&ia->ia_ifa, 1);
}
lck_mtx_unlock(nd6_mutex);
return (0);
}
case SIOCPROTOATTACH_IN6:
switch (ifp->if_type) {
#if IFT_BRIDGE
case IFT_BRIDGE:
return;
#endif
default:
if (error = dlil_plumb_protocol(PF_INET6, ifp))
printf("SIOCPROTOATTACH_IN6: %s error=%d\n",
if_name(ifp), error);
break;
}
return (error);
case SIOCPROTODETACH_IN6:
in6_purgeif(ifp);
if (error = dlil_unplumb_protocol(PF_INET6, ifp))
printf("SIOCPROTODETACH_IN6: %s error=%d\n",
if_name(ifp), error);
return(error);
}
#endif
if (ifra->ifra_addr.sin6_family == AF_INET6) {
struct sockaddr_in6 *sa6 =
(struct sockaddr_in6 *)&ifra->ifra_addr;
if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) {
if (sa6->sin6_addr.s6_addr16[1] == 0) {
sa6->sin6_addr.s6_addr16[1] =
htons(ifp->if_index);
} else if (sa6->sin6_addr.s6_addr16[1] !=
htons(ifp->if_index)) {
return(EINVAL);
}
if (sa6->sin6_scope_id) {
if (sa6->sin6_scope_id !=
(u_int32_t)ifp->if_index)
return(EINVAL);
sa6->sin6_scope_id = 0;
}
}
ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
}
switch (cmd) {
case SIOCSIFADDR_IN6:
case SIOCSIFDSTADDR_IN6:
case SIOCSIFNETMASK_IN6:
error = EINVAL;
goto ioctl_cleanup;
case SIOCDIFADDR_IN6:
if (ia == NULL) {
error = EADDRNOTAVAIL;
goto ioctl_cleanup;
}
case SIOCAIFADDR_IN6:
if (ifra->ifra_addr.sin6_family != AF_INET6 ||
ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) {
error = EAFNOSUPPORT;
goto ioctl_cleanup;
}
if (!privileged) {
error = EPERM;
goto ioctl_cleanup;
}
break;
case SIOCGIFADDR_IN6:
case SIOCGIFAFLAG_IN6:
case SIOCGIFNETMASK_IN6:
case SIOCGIFDSTADDR_IN6:
case SIOCGIFALIFETIME_IN6:
if (ia == NULL) {
error = EADDRNOTAVAIL;
goto ioctl_cleanup;
}
break;
case SIOCSIFALIFETIME_IN6:
{
struct in6_addrlifetime *lt;
if (!privileged) {
error = EPERM;
goto ioctl_cleanup;
}
if (ia == NULL) {
error = EADDRNOTAVAIL;
goto ioctl_cleanup;
}
lt = &ifr->ifr_ifru.ifru_lifetime;
if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
&& lt->ia6t_vltime + timenow.tv_sec < timenow.tv_sec) {
error = EINVAL;
goto ioctl_cleanup;
}
if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
&& lt->ia6t_pltime + timenow.tv_sec < timenow.tv_sec) {
error = EINVAL;
goto ioctl_cleanup;
}
break;
}
}
switch (cmd) {
case SIOCGIFADDR_IN6:
ifr->ifr_addr = ia->ia_addr;
break;
case SIOCGIFDSTADDR_IN6:
if ((ifp->if_flags & IFF_POINTOPOINT) == 0) {
error = EINVAL;
goto ioctl_cleanup;
}
ifr->ifr_dstaddr = ia->ia_dstaddr;
break;
case SIOCGIFNETMASK_IN6:
ifr->ifr_addr = ia->ia_prefixmask;
break;
case SIOCGIFAFLAG_IN6:
ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags;
break;
case SIOCGIFSTAT_IN6:
if (ifp == NULL) {
error = EINVAL;
goto ioctl_cleanup;
}
index = ifp->if_index;
if (in6_ifstat == NULL || index >= in6_ifstatmax
|| in6_ifstat[index] == NULL) {
bzero(&ifr->ifr_ifru.ifru_stat,
sizeof(ifr->ifr_ifru.ifru_stat));
} else
ifr->ifr_ifru.ifru_stat = *in6_ifstat[index];
break;
case SIOCGIFSTAT_ICMP6:
if (ifp == NULL) {
error = EINVAL;
goto ioctl_cleanup;
}
index = ifp->if_index;
if (icmp6_ifstat == NULL || index >= icmp6_ifstatmax ||
icmp6_ifstat[index] == NULL) {
bzero(&ifr->ifr_ifru.ifru_stat,
sizeof(ifr->ifr_ifru.ifru_icmp6stat));
} else
ifr->ifr_ifru.ifru_icmp6stat =
*icmp6_ifstat[index];
break;
case SIOCGIFALIFETIME_IN6:
ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
break;
case SIOCSIFALIFETIME_IN6:
ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime;
if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
ia->ia6_lifetime.ia6t_expire =
timenow.tv_sec + ia->ia6_lifetime.ia6t_vltime;
} else
ia->ia6_lifetime.ia6t_expire = 0;
if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
ia->ia6_lifetime.ia6t_preferred =
timenow.tv_sec + ia->ia6_lifetime.ia6t_pltime;
} else
ia->ia6_lifetime.ia6t_preferred = 0;
break;
case SIOCAIFADDR_IN6:
{
int i;
struct nd_prefix pr0, *pr;
error = dlil_plumb_protocol(PF_INET6, ifp);
if (error) {
if (error != EEXIST) {
printf("SIOCAIFADDR_IN6: %s can't plumb protocol error=%d\n",
if_name(ifp), error);
goto ioctl_cleanup;
}
error = 0;
}
else {
in6_if_up(ifp, NULL);
}
if ((error = in6_update_ifa(ifp, ifra, ia)) != 0)
goto ioctl_cleanup;
bzero(&pr0, sizeof(pr0));
pr0.ndpr_ifp = ifp;
pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
NULL);
if (pr0.ndpr_plen == 128)
break;
pr0.ndpr_prefix = ifra->ifra_addr;
pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr;
for (i = 0; i < 4; i++) {
pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
}
pr0.ndpr_raf_onlink = 1;
pr0.ndpr_raf_auto =
((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
goto ioctl_cleanup;
if (pr == NULL) {
log(LOG_ERR, "nd6_prelist_add succedded but "
"no prefix\n");
error = EINVAL;
goto ioctl_cleanup;
}
}
if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
== NULL) {
log(LOG_ERR, "in6_control: addition succeeded, but"
" no ifaddr\n");
} else {
if ((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 &&
ia->ia6_ndpr == NULL) {
ia->ia6_ndpr = pr;
pr->ndpr_refcnt++;
if (ip6_use_tempaddr &&
pr->ndpr_refcnt == 1) {
int e;
if ((e = in6_tmpifadd(ia, 1)) != 0) {
log(LOG_NOTICE, "in6_control: "
"failed to create a "
"temporary address, "
"errno=%d\n",
e);
}
}
}
pfxlist_onlink_check(0);
}
break;
}
case SIOCDIFADDR_IN6:
{
int i = 0;
struct nd_prefix pr0, *pr;
bzero(&pr0, sizeof(pr0));
pr0.ndpr_ifp = ifp;
pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr,
NULL);
if (pr0.ndpr_plen == 128)
goto purgeaddr;
pr0.ndpr_prefix = ia->ia_addr;
pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr;
for (i = 0; i < 4; i++) {
pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
ia->ia_prefixmask.sin6_addr.s6_addr32[i];
}
if ((pr = nd6_prefix_lookup(&pr0)) != NULL &&
(((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 &&
pr->ndpr_refcnt == 1) ||
((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0 &&
pr->ndpr_refcnt == 0))) {
pr->ndpr_expire = 1;
}
purgeaddr:
in6_purgeaddr(&ia->ia_ifa, 0);
break;
}
default:
#ifdef __APPLE__
error = dlil_ioctl(PF_INET6, ifp, cmd, (caddr_t)data);
goto ioctl_cleanup;
#else
if (ifp == NULL || ifp->if_ioctl == 0)
return(EOPNOTSUPP);
return((*ifp->if_ioctl)(ifp, cmd, data));
#endif
}
ioctl_cleanup:
return error;
}
int
in6_update_ifa(ifp, ifra, ia)
struct ifnet *ifp;
struct in6_aliasreq *ifra;
struct in6_ifaddr *ia;
{
int error = 0, hostIsNew = 0, plen = -1;
struct in6_ifaddr *oia;
struct sockaddr_in6 dst6;
struct in6_addrlifetime *lt;
struct timeval timenow;
lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED);
if (ifp == NULL || ifra == NULL)
return(EINVAL);
if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
return(EAFNOSUPPORT);
if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
return(EINVAL);
if (ifra->ifra_prefixmask.sin6_len == sizeof(struct sockaddr_in6) &&
ifra->ifra_prefixmask.sin6_family == 0) {
ifra->ifra_prefixmask.sin6_family = AF_INET6;
}
if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
return(EINVAL);
if (ifra->ifra_prefixmask.sin6_len != 0) {
plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
(u_char *)&ifra->ifra_prefixmask +
ifra->ifra_prefixmask.sin6_len);
if (plen <= 0)
return(EINVAL);
}
else {
plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
}
dst6 = ifra->ifra_dstaddr;
if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) &&
(dst6.sin6_family == AF_INET6)) {
int scopeid;
#ifndef SCOPEDROUTING
if ((error = in6_recoverscope(&dst6,
&ifra->ifra_dstaddr.sin6_addr,
ifp)) != 0)
return(error);
#endif
scopeid = in6_addr2scopeid(ifp, &dst6.sin6_addr);
if (dst6.sin6_scope_id == 0)
dst6.sin6_scope_id = scopeid;
else if (dst6.sin6_scope_id != scopeid)
return(EINVAL);
#ifndef SCOPEDROUTING
if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL))
!= 0)
return(error);
dst6.sin6_scope_id = 0;
#endif
}
if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
log(LOG_INFO, "in6_update_ifa: a destination can be "
"specified for a p2p or a loopback IF only\n");
return(EINVAL);
}
if (plen != 128) {
log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 "
"when dstaddr is specified\n");
return(EINVAL);
}
}
getmicrotime(&timenow);
lt = &ifra->ifra_lifetime;
if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
&& lt->ia6t_vltime + timenow.tv_sec < timenow.tv_sec) {
return EINVAL;
}
if (lt->ia6t_vltime == 0) {
log(LOG_INFO,
"in6_update_ifa: valid lifetime is 0 for %s\n",
ip6_sprintf(&ifra->ifra_addr.sin6_addr));
}
if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
&& lt->ia6t_pltime + timenow.tv_sec < timenow.tv_sec) {
return EINVAL;
}
if (ia == NULL) {
hostIsNew = 1;
ia = (struct in6_ifaddr *)
_MALLOC(sizeof(*ia), M_IFADDR, M_NOWAIT);
if (ia == NULL)
return ENOBUFS;
bzero((caddr_t)ia, sizeof(*ia));
ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
ia->ia_addr.sin6_family = AF_INET6;
ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
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;
lck_mtx_lock(nd6_mutex);
if ((oia = in6_ifaddrs) != NULL) {
for ( ; oia->ia_next; oia = oia->ia_next)
continue;
oia->ia_next = ia;
} else
in6_ifaddrs = ia;
lck_mtx_unlock(nd6_mutex);
ifnet_lock_exclusive(ifp);
if_attach_ifa(ifp, &ia->ia_ifa);
ifnet_lock_done(ifp);
}
if (ifra->ifra_prefixmask.sin6_len) {
if (ia->ia_prefixmask.sin6_len &&
in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
log(LOG_INFO, "in6_update_ifa: the prefix length of an"
" existing (%s) address should not be changed\n",
ip6_sprintf(&ia->ia_addr.sin6_addr));
error = EINVAL;
goto unlink;
}
ia->ia_prefixmask = ifra->ifra_prefixmask;
}
if (dst6.sin6_family == AF_INET6 &&
!IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr,
&ia->ia_dstaddr.sin6_addr)) {
int e;
if ((ia->ia_flags & IFA_ROUTE) != 0 &&
(e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
!= 0) {
log(LOG_ERR, "in6_update_ifa: failed to remove "
"a route to the old destination: %s\n",
ip6_sprintf(&ia->ia_addr.sin6_addr));
}
else
ia->ia_flags &= ~IFA_ROUTE;
ia->ia_dstaddr = dst6;
}
if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
goto unlink;
#if 0
if (hostIsNew &&
(ifra->ifra_flags & IN6_IFF_NOPFX) == 0) {
int iilen;
iilen = (sizeof(ia->ia_prefixmask.sin6_addr) << 3) - plen;
if ((error = in6_prefix_add_ifid(iilen, ia)) != 0) {
in6_purgeaddr((struct ifaddr *)ia, 0);
return(error);
}
}
#endif
if ((ifp->if_flags & IFF_MULTICAST) != 0) {
struct sockaddr_in6 mltaddr, mltmask;
struct in6_multi *in6m;
if (hostIsNew) {
struct in6_addr llsol;
bzero(&llsol, sizeof(struct in6_addr));
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] =
ifra->ifra_addr.sin6_addr.s6_addr32[3];
llsol.s6_addr8[12] = 0xff;
(void)in6_addmulti(&llsol, ifp, &error, 0);
if (error != 0) {
log(LOG_WARNING,
"in6_update_ifa: addmulti failed for "
"%s on %s (errno=%d)\n",
ip6_sprintf(&llsol), if_name(ifp),
error);
in6_purgeaddr((struct ifaddr *)ia, 0);
return(error);
}
}
bzero(&mltmask, sizeof(mltmask));
mltmask.sin6_len = sizeof(struct sockaddr_in6);
mltmask.sin6_family = AF_INET6;
mltmask.sin6_addr = in6mask32;
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);
ifnet_lock_shared(ifp);
IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
ifnet_lock_done(ifp);
if (in6m == NULL) {
rtrequest(RTM_ADD,
(struct sockaddr *)&mltaddr,
(struct sockaddr *)&ia->ia_addr,
(struct sockaddr *)&mltmask,
RTF_UP|RTF_CLONING,
(struct rtentry **)0);
(void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error, 0);
if (error != 0) {
log(LOG_WARNING,
"in6_update_ifa: addmulti failed for "
"%s on %s (errno=%d)\n",
ip6_sprintf(&mltaddr.sin6_addr),
if_name(ifp), error);
}
}
#define hostnamelen strlen(hostname)
if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr)
== 0) {
ifnet_lock_shared(ifp);
IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
ifnet_lock_done(ifp);
if (in6m == NULL && ia != NULL) {
(void)in6_addmulti(&mltaddr.sin6_addr,
ifp, &error, 0);
if (error != 0) {
log(LOG_WARNING, "in6_update_ifa: "
"addmulti failed for "
"%s on %s (errno=%d)\n",
ip6_sprintf(&mltaddr.sin6_addr),
if_name(ifp), error);
}
}
}
#undef hostnamelen
if (ifp->if_flags & IFF_LOOPBACK) {
struct in6_ifaddr *ia_loop;
struct in6_addr loop6 = in6addr_loopback;
ia_loop = in6ifa_ifpwithaddr(ifp, &loop6);
mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
ifnet_lock_shared(ifp);
IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
ifnet_lock_done(ifp);
if (in6m == NULL && ia_loop != NULL) {
rtrequest(RTM_ADD,
(struct sockaddr *)&mltaddr,
(struct sockaddr *)&ia_loop->ia_addr,
(struct sockaddr *)&mltmask,
RTF_UP,
(struct rtentry **)0);
(void)in6_addmulti(&mltaddr.sin6_addr, ifp,
&error, 0);
if (error != 0) {
log(LOG_WARNING, "in6_update_ifa: "
"addmulti failed for %s on %s "
"(errno=%d)\n",
ip6_sprintf(&mltaddr.sin6_addr),
if_name(ifp), error);
}
}
}
}
ia->ia6_flags = ifra->ifra_flags;
ia->ia6_flags &= ~IN6_IFF_DUPLICATED;
ia->ia6_flags &= ~IN6_IFF_NODAD;
ia->ia6_lifetime = ifra->ifra_lifetime;
if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) {
ia->ia6_lifetime.ia6t_expire =
timenow.tv_sec + ia->ia6_lifetime.ia6t_vltime;
} else
ia->ia6_lifetime.ia6t_expire = 0;
if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) {
ia->ia6_lifetime.ia6t_preferred =
timenow.tv_sec + ia->ia6_lifetime.ia6t_pltime;
} else
ia->ia6_lifetime.ia6t_preferred = 0;
nd6_ifattach(ifp);
if (in6if_do_dad(ifp) && (ifra->ifra_flags & IN6_IFF_NODAD) == 0) {
ia->ia6_flags |= IN6_IFF_TENTATIVE;
nd6_dad_start((struct ifaddr *)ia, NULL);
}
return(error);
unlink:
if (hostIsNew)
in6_unlink_ifa(ia, ifp, 0);
return(error);
}
void
in6_purgeaddr(
struct ifaddr *ifa, int nd6_locked)
{
struct ifnet *ifp = ifa->ifa_ifp;
struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
nd6_dad_stop(ifa);
if ((ia->ia_flags & IFA_ROUTE) != 0 && ia->ia_dstaddr.sin6_len != 0) {
int e;
if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
!= 0) {
log(LOG_ERR, "in6_purgeaddr: failed to remove "
"a route to the p2p destination: %s on %s, "
"errno=%d\n",
ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp),
e);
}
else
ia->ia_flags &= ~IFA_ROUTE;
}
in6_ifremloop(&(ia->ia_ifa), nd6_locked);
if (ifp->if_flags & IFF_MULTICAST) {
struct in6_multi *in6m;
struct in6_addr llsol;
bzero(&llsol, sizeof(struct in6_addr));
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;
ifnet_lock_shared(ifp);
IN6_LOOKUP_MULTI(llsol, ifp, in6m);
ifnet_lock_done(ifp);
if (in6m)
in6_delmulti(in6m, nd6_locked);
}
in6_unlink_ifa(ia, ifp, nd6_locked);
in6_post_msg(ifp, KEV_INET6_ADDR_DELETED, ia);
}
static void
in6_unlink_ifa(ia, ifp, nd6_locked)
struct in6_ifaddr *ia;
struct ifnet *ifp;
int nd6_locked;
{
int plen, iilen;
struct in6_ifaddr *oia;
ifnet_lock_exclusive(ifp);
if_detach_ifa(ifp, &ia->ia_ifa);
ifnet_lock_done(ifp);
if (!nd6_locked)
lck_mtx_lock(nd6_mutex);
oia = ia;
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 {
printf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
}
}
if (oia->ia6_ifpr) {
plen = in6_mask2len(&oia->ia_prefixmask.sin6_addr, NULL);
iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) - plen;
in6_prefix_remove_ifid(iilen, oia);
}
if ((oia->ia6_flags & IN6_IFF_AUTOCONF) != 0) {
if (oia->ia6_ndpr == NULL) {
log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address "
"%p has no prefix\n", oia);
} else {
oia->ia6_ndpr->ndpr_refcnt--;
oia->ia6_flags &= ~IN6_IFF_AUTOCONF;
oia->ia6_ndpr = NULL;
}
pfxlist_onlink_check(1);
}
if (!nd6_locked)
lck_mtx_unlock(nd6_mutex);
ifafree(&oia->ia_ifa);
}
void
in6_purgeif(ifp)
struct ifnet *ifp;
{
struct in6_ifaddr *ia, *nia = NULL;
if (ifp == NULL || &ifp->if_addrlist == NULL)
return;
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);
in6_ifdetach(ifp);
}
static int
in6_lifaddr_ioctl(so, cmd, data, ifp, p)
struct socket *so;
u_long cmd;
caddr_t data;
struct ifnet *ifp;
struct proc *p;
{
struct if_laddrreq *iflr = (struct if_laddrreq *)data;
struct ifaddr *ifa;
struct sockaddr *sa;
if (!data || !ifp) {
panic("invalid argument to in6_lifaddr_ioctl");
}
switch (cmd) {
case SIOCGLIFADDR:
if ((iflr->flags & IFLR_PREFIX) == 0)
break;
case SIOCALIFADDR:
case SIOCDLIFADDR:
sa = (struct sockaddr *)&iflr->addr;
if (sa->sa_family != AF_INET6)
return EINVAL;
if (sa->sa_len != sizeof(struct sockaddr_in6))
return EINVAL;
sa = (struct sockaddr *)&iflr->dstaddr;
if (sa->sa_family && sa->sa_family != AF_INET6)
return EINVAL;
if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
return EINVAL;
break;
default:
#if 0
panic("invalid cmd to in6_lifaddr_ioctl");
#else
return EOPNOTSUPP;
#endif
}
if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
return EINVAL;
switch (cmd) {
case SIOCALIFADDR:
{
struct in6_aliasreq ifra;
struct in6_addr hostid;
int prefixlen;
int hostid_found = 0;
if ((iflr->flags & IFLR_PREFIX) != 0) {
struct sockaddr_in6 *sin6;
ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
if (!ifa)
return EADDRNOTAVAIL;
hostid = *IFA_IN6(ifa);
hostid_found = 1;
if (64 < iflr->prefixlen)
return EINVAL;
prefixlen = iflr->prefixlen;
sin6 = (struct sockaddr_in6 *)&iflr->addr;
if (sin6->sin6_addr.s6_addr32[2] != 0
|| sin6->sin6_addr.s6_addr32[3] != 0) {
return EINVAL;
}
} else
prefixlen = iflr->prefixlen;
bzero(&ifra, sizeof(ifra));
bcopy(iflr->iflr_name, ifra.ifra_name,
sizeof(ifra.ifra_name));
bcopy(&iflr->addr, &ifra.ifra_addr,
((struct sockaddr *)&iflr->addr)->sa_len);
if (hostid_found) {
ifra.ifra_addr.sin6_addr.s6_addr32[2] =
hostid.s6_addr32[2];
ifra.ifra_addr.sin6_addr.s6_addr32[3] =
hostid.s6_addr32[3];
}
if (((struct sockaddr *)&iflr->dstaddr)->sa_family) {
bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
((struct sockaddr *)&iflr->dstaddr)->sa_len);
if (hostid_found) {
ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
hostid.s6_addr32[2];
ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] =
hostid.s6_addr32[3];
}
}
ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6);
in6_len2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen);
ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX;
return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, p);
}
case SIOCGLIFADDR:
case SIOCDLIFADDR:
{
struct in6_ifaddr *ia;
struct in6_addr mask, candidate, match;
struct sockaddr_in6 *sin6;
int cmp;
bzero(&mask, sizeof(mask));
if (iflr->flags & IFLR_PREFIX) {
in6_len2mask(&mask, iflr->prefixlen);
sin6 = (struct sockaddr_in6 *)&iflr->addr;
bcopy(&sin6->sin6_addr, &match, sizeof(match));
match.s6_addr32[0] &= mask.s6_addr32[0];
match.s6_addr32[1] &= mask.s6_addr32[1];
match.s6_addr32[2] &= mask.s6_addr32[2];
match.s6_addr32[3] &= mask.s6_addr32[3];
if (bcmp(&match, &sin6->sin6_addr, sizeof(match)))
return EINVAL;
cmp = 1;
} else {
if (cmd == SIOCGLIFADDR) {
cmp = 0;
} else {
in6_len2mask(&mask, 128);
sin6 = (struct sockaddr_in6 *)&iflr->addr;
bcopy(&sin6->sin6_addr, &match, sizeof(match));
cmp = 1;
}
}
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
if (!cmp)
break;
bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
#ifndef SCOPEDROUTING
if (IN6_IS_ADDR_LINKLOCAL(&candidate))
candidate.s6_addr16[1] = 0;
#endif
candidate.s6_addr32[0] &= mask.s6_addr32[0];
candidate.s6_addr32[1] &= mask.s6_addr32[1];
candidate.s6_addr32[2] &= mask.s6_addr32[2];
candidate.s6_addr32[3] &= mask.s6_addr32[3];
if (IN6_ARE_ADDR_EQUAL(&candidate, &match))
break;
}
ifnet_lock_done(ifp);
if (!ifa)
return EADDRNOTAVAIL;
ia = ifa2ia6(ifa);
if (cmd == SIOCGLIFADDR) {
#ifndef SCOPEDROUTING
struct sockaddr_in6 *s6;
#endif
bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
#ifndef SCOPEDROUTING
s6 = (struct sockaddr_in6 *)&iflr->addr;
if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
s6->sin6_addr.s6_addr16[1] = 0;
s6->sin6_scope_id =
in6_addr2scopeid(ifp, &s6->sin6_addr);
}
#endif
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
ia->ia_dstaddr.sin6_len);
#ifndef SCOPEDROUTING
s6 = (struct sockaddr_in6 *)&iflr->dstaddr;
if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
s6->sin6_addr.s6_addr16[1] = 0;
s6->sin6_scope_id =
in6_addr2scopeid(ifp,
&s6->sin6_addr);
}
#endif
} else
bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
iflr->prefixlen =
in6_mask2len(&ia->ia_prefixmask.sin6_addr,
NULL);
iflr->flags = ia->ia6_flags;
return 0;
} else {
struct in6_aliasreq ifra;
bzero(&ifra, sizeof(ifra));
bcopy(iflr->iflr_name, ifra.ifra_name,
sizeof(ifra.ifra_name));
bcopy(&ia->ia_addr, &ifra.ifra_addr,
ia->ia_addr.sin6_len);
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
ia->ia_dstaddr.sin6_len);
} else {
bzero(&ifra.ifra_dstaddr,
sizeof(ifra.ifra_dstaddr));
}
bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
ia->ia_prefixmask.sin6_len);
ifra.ifra_flags = ia->ia6_flags;
return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
ifp, p);
}
}
}
return EOPNOTSUPP;
}
static int
in6_ifinit(ifp, ia, sin6, newhost)
struct ifnet *ifp;
struct in6_ifaddr *ia;
struct sockaddr_in6 *sin6;
int newhost;
{
int error = 0, plen, ifacount = 0;
struct ifaddr *ifa;
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr == NULL)
continue;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
ifacount++;
}
ifnet_lock_done(ifp);
ia->ia_addr = *sin6;
if (ifacount <= 1 &&
(error = dlil_ioctl(PF_INET6, ifp, SIOCSIFADDR, (caddr_t)ia))) {
if (error) {
return(error);
}
}
ia->ia_ifa.ifa_metric = ifp->if_metric;
plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) {
if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD,
RTF_UP | RTF_HOST)) != 0)
return(error);
ia->ia_flags |= IFA_ROUTE;
}
if (plen < 128) {
ia->ia_ifa.ifa_flags |= RTF_CLONING;
}
if (newhost) {
ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
in6_ifaddloop(&(ia->ia_ifa));
}
return(error);
}
struct in6_multi *
in6_addmulti(maddr6, ifp, errorp, nd6_locked)
struct in6_addr *maddr6;
struct ifnet *ifp;
int *errorp;
int nd6_locked;
{
struct in6_multi *in6m;
struct sockaddr_in6 sin6;
struct ifmultiaddr *ifma;
*errorp = 0;
bzero(&sin6, sizeof sin6);
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof sin6;
sin6.sin6_addr = *maddr6;
*errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma);
if (*errorp) {
return 0;
}
if (ifma->ifma_protospec != 0)
return ifma->ifma_protospec;
in6m = (struct in6_multi *)_MALLOC(sizeof(*in6m), M_IPMADDR, M_NOWAIT);
if (in6m == NULL) {
return (NULL);
}
bzero(in6m, sizeof *in6m);
in6m->in6m_addr = *maddr6;
in6m->in6m_ifp = ifp;
in6m->in6m_ifma = ifma;
ifma->ifma_protospec = in6m;
if (nd6_locked == 0)
lck_mtx_lock(nd6_mutex);
LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry);
if (nd6_locked == 0)
lck_mtx_unlock(nd6_mutex);
mld6_start_listening(in6m);
return(in6m);
}
void
in6_delmulti(
struct in6_multi *in6m, int nd6locked)
{
struct ifmultiaddr *ifma = in6m->in6m_ifma;
if (ifma && ifma->ifma_usecount == 1) {
mld6_stop_listening(in6m);
ifma->ifma_protospec = 0;
if (nd6locked == 0)
lck_mtx_lock(nd6_mutex);
LIST_REMOVE(in6m, in6m_entry);
if (nd6locked == 0)
lck_mtx_unlock(nd6_mutex);
FREE(in6m, M_IPMADDR);
}
if (ifma) {
if_delmultiaddr(ifma, 0);
ifma_release(ifma);
}
}
struct in6_ifaddr *
in6ifa_ifpforlinklocal(ifp, ignoreflags)
struct ifnet *ifp;
int ignoreflags;
{
struct ifaddr *ifa;
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr == NULL)
continue;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
if ((((struct in6_ifaddr *)ifa)->ia6_flags &
ignoreflags) != 0)
continue;
break;
}
}
ifnet_lock_done(ifp);
return((struct in6_ifaddr *)ifa);
}
struct in6_ifaddr *
in6ifa_ifpwithaddr(ifp, addr)
struct ifnet *ifp;
struct in6_addr *addr;
{
struct ifaddr *ifa;
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr == NULL)
continue;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa)))
break;
}
ifnet_lock_done(ifp);
return((struct in6_ifaddr *)ifa);
}
static char digits[] = "0123456789abcdef";
static int ip6round = 0;
char *
ip6_sprintf(addr)
const struct in6_addr *addr;
{
static char ip6buf[8][48];
int i;
char *cp;
const u_short *a = (const u_short *)addr;
const u_char *d;
int dcolon = 0;
ip6round = (ip6round + 1) & 7;
cp = ip6buf[ip6round];
for (i = 0; i < 8; i++) {
if (dcolon == 1) {
if (*a == 0) {
if (i == 7)
*cp++ = ':';
a++;
continue;
} else
dcolon = 2;
}
if (*a == 0) {
if (dcolon == 0 && *(a + 1) == 0) {
if (i == 0)
*cp++ = ':';
*cp++ = ':';
dcolon = 1;
} else {
*cp++ = '0';
*cp++ = ':';
}
a++;
continue;
}
d = (const u_char *)a;
*cp++ = digits[*d >> 4];
*cp++ = digits[*d++ & 0xf];
*cp++ = digits[*d >> 4];
*cp++ = digits[*d & 0xf];
*cp++ = ':';
a++;
}
*--cp = 0;
return(ip6buf[ip6round]);
}
int
in6_localaddr(in6)
struct in6_addr *in6;
{
struct in6_ifaddr *ia;
if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6))
return 1;
lck_mtx_lock(nd6_mutex);
for (ia = in6_ifaddrs; ia; ia = ia->ia_next)
if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr,
&ia->ia_prefixmask.sin6_addr)) {
lck_mtx_unlock(nd6_mutex);
return 1;
}
lck_mtx_unlock(nd6_mutex);
return (0);
}
int
in6_is_addr_deprecated(sa6)
struct sockaddr_in6 *sa6;
{
struct in6_ifaddr *ia;
lck_mtx_lock(nd6_mutex);
for (ia = in6_ifaddrs; ia; ia = ia->ia_next) {
if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
&sa6->sin6_addr) &&
#if SCOPEDROUTING
ia->ia_addr.sin6_scope_id == sa6->sin6_scope_id &&
#endif
(ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) {
lck_mtx_unlock(nd6_mutex);
return(1);
}
}
lck_mtx_unlock(nd6_mutex);
return(0);
}
int
in6_matchlen(src, dst)
struct in6_addr *src, *dst;
{
int match = 0;
u_char *s = (u_char *)src, *d = (u_char *)dst;
u_char *lim = s + 16, r;
while (s < lim)
if ((r = (*d++ ^ *s++)) != 0) {
while (r < 128) {
match++;
r <<= 1;
}
break;
} else
match += 8;
return match;
}
int
in6_are_prefix_equal(p1, p2, len)
struct in6_addr *p1, *p2;
int len;
{
int bytelen, bitlen;
if (0 > len || len > 128) {
log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n",
len);
return(0);
}
bytelen = len / 8;
bitlen = len % 8;
if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen))
return(0);
if (bitlen != 0 &&
p1->s6_addr[bytelen] >> (8 - bitlen) !=
p2->s6_addr[bytelen] >> (8 - bitlen))
return(0);
return(1);
}
void
in6_prefixlen2mask(maskp, len)
struct in6_addr *maskp;
int len;
{
u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
int bytelen, bitlen, i;
if (0 > len || len > 128) {
log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n",
len);
return;
}
bzero(maskp, sizeof(*maskp));
bytelen = len / 8;
bitlen = len % 8;
for (i = 0; i < bytelen; i++)
maskp->s6_addr[i] = 0xff;
if (bitlen)
maskp->s6_addr[bytelen] = maskarray[bitlen - 1];
}
struct in6_ifaddr *
in6_ifawithscope(
struct ifnet *oifp,
struct in6_addr *dst)
{
int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0;
int blen = -1;
struct ifaddr *ifa;
struct ifnet *ifp;
struct in6_ifaddr *ifa_best = NULL;
if (oifp == NULL) {
#if 0
printf("in6_ifawithscope: output interface is not specified\n");
#endif
return(NULL);
}
ifnet_head_lock_shared();
TAILQ_FOREACH(ifp, &ifnet_head, if_list) {
if (in6_addr2scopeid(ifp, dst) != in6_addr2scopeid(oifp, dst))
continue;
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
int tlen = -1, dscopecmp, bscopecmp, matchcmp;
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
src_scope = in6_addrscope(IFA_IN6(ifa));
if (((struct in6_ifaddr *)ifa)->ia6_flags &
IN6_IFF_NOTREADY)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags &
IN6_IFF_ANYCAST)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags &
IN6_IFF_DETACHED)
continue;
if (ifa_best == NULL)
goto replace;
if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 &&
IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0)
goto replace;
if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 &&
IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags &
IN6_IFF_DEPRECATED) {
if (!ip6_use_deprecated)
continue;
if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED)
== 0)
continue;
}
if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) &&
(((struct in6_ifaddr *)ifa)->ia6_flags &
IN6_IFF_DEPRECATED) == 0)
goto replace;
if (ip6_use_tempaddr) {
struct in6_ifaddr *ifat;
ifat = (struct in6_ifaddr *)ifa;
if ((ifa_best->ia6_flags &
(IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
== IN6_IFF_AUTOCONF &&
(ifat->ia6_flags &
(IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
== (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) {
goto replace;
}
if ((ifa_best->ia6_flags &
(IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
== (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) &&
(ifat->ia6_flags &
(IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
== IN6_IFF_AUTOCONF) {
continue;
}
}
dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope);
bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope);
if (bscopecmp == 0) {
struct ifnet *bifp = ifa_best->ia_ifp;
if (bifp == oifp && ifp != oifp)
continue;
if (bifp != oifp && ifp == oifp)
goto replace;
tlen = in6_matchlen(IFA_IN6(ifa), dst);
matchcmp = tlen - blen;
if (matchcmp > 0)
goto replace;
continue;
}
if (dscopecmp > 0) {
if (bscopecmp > 0)
continue;
goto replace;
}
if (dscopecmp < 0) {
if (bscopecmp > 0)
goto replace;
continue;
}
if (bscopecmp < 0)
goto replace;
replace:
ifaref(ifa);
if (ifa_best)
ifafree(&ifa_best->ia_ifa);
ifa_best = (struct in6_ifaddr *)ifa;
blen = tlen >= 0 ? tlen :
in6_matchlen(IFA_IN6(ifa), dst);
best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr);
}
ifnet_lock_done(ifp);
}
ifnet_head_done();
if (ifa_best == NULL)
ip6stat.ip6s_sources_none++;
else {
if (oifp == ifa_best->ia_ifp)
ip6stat.ip6s_sources_sameif[best_scope]++;
else
ip6stat.ip6s_sources_otherif[best_scope]++;
if (best_scope == dst_scope)
ip6stat.ip6s_sources_samescope[best_scope]++;
else
ip6stat.ip6s_sources_otherscope[best_scope]++;
if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) != 0)
ip6stat.ip6s_sources_deprecated[best_scope]++;
}
return(ifa_best);
}
struct in6_ifaddr *
in6_ifawithifp(
struct ifnet *ifp,
struct in6_addr *dst)
{
int dst_scope = in6_addrscope(dst), blen = -1, tlen;
struct ifaddr *ifa;
struct in6_ifaddr *besta = 0;
struct in6_ifaddr *dep[2];
dep[0] = dep[1] = NULL;
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
if (ip6_use_deprecated)
dep[0] = (struct in6_ifaddr *)ifa;
continue;
}
if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
if (besta) {
if (blen == -1)
blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst);
tlen = in6_matchlen(IFA_IN6(ifa), dst);
if (tlen > blen) {
blen = tlen;
besta = (struct in6_ifaddr *)ifa;
}
} else
besta = (struct in6_ifaddr *)ifa;
}
}
if (besta) {
ifnet_lock_done(ifp);
return(besta);
}
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED)
continue;
if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) {
if (ip6_use_deprecated)
dep[1] = (struct in6_ifaddr *)ifa;
continue;
}
ifnet_lock_done(ifp);
return (struct in6_ifaddr *)ifa;
}
ifnet_lock_done(ifp);
if (dep[0])
return dep[0];
if (dep[1])
return dep[1];
return NULL;
}
extern int in6_init2done;
void
in6_if_up(
struct ifnet *ifp,
struct in6_aliasreq *ifra)
{
struct ifaddr *ifa;
struct in6_ifaddr *ia;
int dad_delay;
if (!in6_init2done)
return;
in6_ifattach(ifp, NULL, ifra);
dad_delay = 0;
ifnet_lock_exclusive(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
ia = (struct in6_ifaddr *)ifa;
if (ia->ia6_flags & IN6_IFF_TENTATIVE)
nd6_dad_start(ifa, &dad_delay);
}
ifnet_lock_done(ifp);
}
int
in6if_do_dad(
struct ifnet *ifp)
{
if ((ifp->if_flags & IFF_LOOPBACK) != 0)
return(0);
switch (ifp->if_type) {
#if IFT_DUMMY
case IFT_DUMMY:
#endif
case IFT_FAITH:
return(0);
default:
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) !=
(IFF_UP|IFF_RUNNING))
return(0);
return(1);
}
}
void
in6_setmaxmtu()
{
unsigned long maxmtu = 0;
struct ifnet *ifp;
ifnet_head_lock_shared();
TAILQ_FOREACH(ifp, &ifnet_head, if_list) {
if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
nd_ifinfo[ifp->if_index].linkmtu > maxmtu)
maxmtu = nd_ifinfo[ifp->if_index].linkmtu;
}
ifnet_head_done();
if (maxmtu)
in6_maxmtu = maxmtu;
}
void
in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
{
bzero(sin, sizeof(*sin));
sin->sin_len = sizeof(struct sockaddr_in);
sin->sin_family = AF_INET;
sin->sin_port = sin6->sin6_port;
sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3];
}
void
in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6)
{
bzero(sin6, sizeof(*sin6));
sin6->sin6_len = sizeof(struct sockaddr_in6);
sin6->sin6_family = AF_INET6;
sin6->sin6_port = sin->sin_port;
sin6->sin6_addr.s6_addr32[0] = 0;
sin6->sin6_addr.s6_addr32[1] = 0;
sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP;
sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr;
}
void
in6_sin6_2_sin_in_sock(struct sockaddr *nam)
{
struct sockaddr_in *sin_p;
struct sockaddr_in6 sin6;
sin6 = *(struct sockaddr_in6 *)nam;
sin_p = (struct sockaddr_in *)nam;
in6_sin6_2_sin(sin_p, &sin6);
}
void
in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam)
{
struct sockaddr_in *sin_p;
struct sockaddr_in6 *sin6_p;
MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME,
M_WAITOK);
sin_p = (struct sockaddr_in *)*nam;
in6_sin_2_v4mapsin6(sin_p, sin6_p);
FREE(*nam, M_SONAME);
*nam = (struct sockaddr *)sin6_p;
}
void
in6_post_msg(struct ifnet *ifp, u_long event_code, struct in6_ifaddr *ifa)
{
struct kev_msg ev_msg;
struct kev_in6_data in6_event_data;
ev_msg.vendor_code = KEV_VENDOR_APPLE;
ev_msg.kev_class = KEV_NETWORK_CLASS;
ev_msg.kev_subclass = KEV_INET6_SUBCLASS;
ev_msg.event_code = event_code;
in6_event_data.ia_addr = ifa->ia_addr;
in6_event_data.ia_net = ifa->ia_net;
in6_event_data.ia_dstaddr = ifa->ia_dstaddr;
in6_event_data.ia_prefixmask = ifa->ia_prefixmask;
in6_event_data.ia_plen = ifa->ia_plen;
in6_event_data.ia6_flags = (u_int32_t)ifa->ia6_flags;
in6_event_data.ia_lifetime = ifa->ia6_lifetime;
if (ifp != NULL) {
strncpy(&in6_event_data.link_data.if_name[0], ifp->if_name, IFNAMSIZ);
in6_event_data.link_data.if_family = ifp->if_family;
in6_event_data.link_data.if_unit = (unsigned long) ifp->if_unit;
}
ev_msg.dv[0].data_ptr = &in6_event_data;
ev_msg.dv[0].data_length = sizeof(struct kev_in6_data);
ev_msg.dv[1].data_length = 0;
kev_post_msg(&ev_msg);
}