/*
- * Copyright (c) 2008-2009 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <sys/syslog.h>
#include <sys/protosw.h>
#include <sys/proc.h>
+#include <sys/mcache.h>
+
#include <kern/queue.h>
#include <kern/zalloc.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
-#include <net/if_atm.h>
+#include <net/if_llreach.h>
#include <net/route.h>
#include <net/dlil.h>
+#include <net/ntstat.h>
#include <netinet/in.h>
#include <netinet/in_arp.h>
#include <netinet/if_ether.h>
-#include <netinet/if_fddi.h>
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/nd6.h>
-#include <netinet6/in6_prefix.h>
+#include <netinet6/scope6_var.h>
#include <netinet/icmp6.h>
#include "loop.h"
int nd6_maxndopt = 10; /* max # of ND options allowed */
int nd6_maxnudhint = 0; /* max # of subsequent upper layer hints */
+int nd6_maxqueuelen = 1; /* max # of packets cached in unresolved ND entries */
#if ND6_DEBUG
int nd6_debug = 1;
int nd6_debug = 0;
#endif
+static int nd6_is_new_addr_neighbor (struct sockaddr_in6 *, struct ifnet *);
+
/* for debugging? */
static int nd6_inuse, nd6_allocated;
*
* - Routing lock (rnh_lock)
*
- * ln_hold, ln_asked, ln_expire, ln_state, ln_router, ln_byhint, ln_flags
+ * ln_hold, ln_asked, ln_expire, ln_state, ln_router, ln_byhint, ln_flags,
+ * ln_llreach, ln_lastused
*
* - Routing entry lock (rt_lock)
*
* freed until the route itself is freed.
*/
struct llinfo_nd6 llinfo_nd6 = {
- &llinfo_nd6, &llinfo_nd6, NULL, NULL, 0, 0, 0, 0, 0, 0
+ &llinfo_nd6, &llinfo_nd6, NULL, NULL, 0, 0, 0, 0, 0, 0, NULL, 0
};
/* Protected by nd_if_rwlock */
struct nd_drhead nd_defrouter;
struct nd_prhead nd_prefix = { 0 };
+/* Serialization variables for nd6_drain() */
+static boolean_t nd6_drain_busy;
+static void *nd6_drain_waitchan = &nd6_drain_busy;
+static int nd6_drain_waiters = 0;
+
int nd6_recalc_reachtm_interval = ND6_RECALC_REACHTM_INTERVAL;
static struct sockaddr_in6 all1_sa;
static int regen_tmpaddr(struct in6_ifaddr *);
-extern lck_mtx_t *ip6_mutex;
extern lck_mtx_t *nd6_mutex;
static void nd6_slowtimo(void *ignored_arg);
static struct llinfo_nd6 *nd6_llinfo_alloc(void);
static void nd6_llinfo_free(void *);
+static void nd6_llinfo_purge(struct rtentry *);
+static void nd6_llinfo_get_ri(struct rtentry *, struct rt_reach_info *);
static void nd6_siocgdrlst(void *, int);
static void nd6_siocgprlst(void *, int);
panic("%s: failed allocating llinfo_nd6_zone", __func__);
zone_change(llinfo_nd6_zone, Z_EXPAND, TRUE);
+ zone_change(llinfo_nd6_zone, Z_CALLERACCT, FALSE);
+
+ nd6_nbr_init();
+ nd6_rtr_init();
nd6_init_done = 1;
ln->ln_hold = NULL;
}
+ /* Purge any link-layer info caching */
+ VERIFY(ln->ln_rt->rt_llinfo == ln);
+ if (ln->ln_rt->rt_llinfo_purge != NULL)
+ ln->ln_rt->rt_llinfo_purge(ln->ln_rt);
+
zfree(llinfo_nd6_zone, ln);
}
+static void
+nd6_llinfo_purge(struct rtentry *rt)
+{
+ struct llinfo_nd6 *ln = rt->rt_llinfo;
+
+ RT_LOCK_ASSERT_HELD(rt);
+ VERIFY(rt->rt_llinfo_purge == nd6_llinfo_purge && ln != NULL);
+
+ if (ln->ln_llreach != NULL) {
+ RT_CONVERT_LOCK(rt);
+ ifnet_llreach_free(ln->ln_llreach);
+ ln->ln_llreach = NULL;
+ }
+ ln->ln_lastused = 0;
+}
+
+static void
+nd6_llinfo_get_ri(struct rtentry *rt, struct rt_reach_info *ri)
+{
+ struct llinfo_nd6 *ln = rt->rt_llinfo;
+ struct if_llreach *lr = ln->ln_llreach;
+
+ if (lr == NULL) {
+ bzero(ri, sizeof (*ri));
+ } else {
+ IFLR_LOCK(lr);
+ /* Export to rt_reach_info structure */
+ ifnet_lr2ri(lr, ri);
+ /* Export ND6 send expiration time */
+ ri->ri_snd_expire = ifnet_llreach_up2cal(lr, ln->ln_lastused);
+ IFLR_UNLOCK(lr);
+ }
+}
+
int
nd6_ifattach(struct ifnet *ifp)
{
ND.basereachable = REACHABLE_TIME;
ND.reachable = ND_COMPUTE_RTIME(ND.basereachable);
ND.retrans = RETRANS_TIMER;
- ND.receivedra = 0;
ND.flags = ND6_IFF_PERFORMNUD;
lck_rw_done(nd_if_rwlock);
nd6_setmtu(ifp);
* the sanity checks related to the maximum MTU allowed for the
* interface (a value that is known only by the interface layer),
* by sending the request down via ifnet_ioctl(). The use of the
- * ND level maxmtu and linkmtu (the latter obtained via RA) are done
- * via IN6_LINKMTU() which does further checking against if_mtu.
+ * ND level maxmtu and linkmtu are done via IN6_LINKMTU() which
+ * does further checking against if_mtu.
*/
maxmtu = ndi->maxmtu = ifp->if_mtu;
"new link MTU on %s%d (%u) is too small for IPv6\n",
ifp->if_name, ifp->if_unit, (uint32_t)ndi->maxmtu);
}
+ ndi->linkmtu = ifp->if_mtu;
lck_rw_done(nd_if_rwlock);
/* also adjust in6_maxmtu if necessary. */
struct nd_opt_hdr *nd_opt;
int i = 0;
- if (!ndopts)
- panic("ndopts == NULL in nd6_options\n");
- if (!ndopts->nd_opts_last)
- panic("uninitialized ndopts in nd6_options\n");
- if (!ndopts->nd_opts_search)
+ if (ndopts == NULL)
+ panic("ndopts == NULL in nd6_options");
+ if (ndopts->nd_opts_last == NULL)
+ panic("uninitialized ndopts in nd6_options");
+ if (ndopts->nd_opts_search == NULL)
return 0;
while (1) {
nd_opt = nd6_option(ndopts);
- if (!nd_opt && !ndopts->nd_opts_last) {
+ if (nd_opt == NULL && ndopts->nd_opts_last == NULL) {
/*
* Message validation requires that all included
* options have a length that is greater than zero.
return -1;
}
- if (!nd_opt)
+ if (nd_opt == NULL)
goto skip1;
switch (nd_opt->nd_opt_type) {
ndopts->nd_opts_pi_end =
(struct nd_opt_prefix_info *)nd_opt;
break;
+ case ND_OPT_RDNSS:
+ /* ignore */
+ break;
default:
/*
* Unknown options must be silently ignored,
return 0;
}
-/*
- * ND6 timer routine to expire default route list and prefix list
- */
void
-nd6_timer(
- __unused void *ignored_arg)
+nd6_drain(__unused void *ignored_arg)
{
struct llinfo_nd6 *ln;
struct nd_defrouter *dr;
struct rtentry *rt;
struct sockaddr_in6 *dst;
struct llinfo_nd6 *next;
- struct nd_ifinfo ndi;
/* ln_next/prev/rt is protected by rnh_lock */
next = ln->ln_next;
ln = next;
continue;
}
- ndi = nd_ifinfo[ifp->if_index];
lck_rw_done(nd_if_rwlock);
RT_LOCK_ASSERT_HELD(rt);
case ND6_LLINFO_INCOMPLETE:
if (ln->ln_asked < nd6_mmaxtries) {
ln->ln_asked++;
+ lck_rw_lock_shared(nd_if_rwlock);
ln->ln_expire = timenow.tv_sec +
- ndi.retrans / 1000;
+ nd_ifinfo[ifp->if_index].retrans / 1000;
+ lck_rw_done(nd_if_rwlock);
RT_ADDREF_LOCKED(rt);
RT_UNLOCK(rt);
lck_mtx_unlock(rnh_lock);
nd6_ns_output(ifp, NULL, &dst->sin6_addr,
- ln, 0, 0);
+ ln, 0);
RT_REMREF(rt);
} else {
struct mbuf *m = ln->ln_hold;
case ND6_LLINFO_REACHABLE:
if (ln->ln_expire) {
ln->ln_state = ND6_LLINFO_STALE;
- ln->ln_expire = timenow.tv_sec + nd6_gctimer;
+ ln->ln_expire = rt_expiry(rt, timenow.tv_sec,
+ nd6_gctimer);
}
RT_UNLOCK(rt);
break;
break;
case ND6_LLINFO_DELAY:
- if ((ndi.flags & ND6_IFF_PERFORMNUD) != 0) {
+ lck_rw_lock_shared(nd_if_rwlock);
+ if ((nd_ifinfo[ifp->if_index].flags &
+ ND6_IFF_PERFORMNUD) != 0) {
/* We need NUD */
ln->ln_asked = 1;
ln->ln_state = ND6_LLINFO_PROBE;
ln->ln_expire = timenow.tv_sec +
- ndi.retrans / 1000;
+ nd_ifinfo[ifp->if_index].retrans / 1000;
+ lck_rw_done(nd_if_rwlock);
RT_ADDREF_LOCKED(rt);
RT_UNLOCK(rt);
lck_mtx_unlock(rnh_lock);
nd6_ns_output(ifp, &dst->sin6_addr,
- &dst->sin6_addr, ln, 0, 0);
+ &dst->sin6_addr, ln, 0);
lck_mtx_assert(rnh_lock,
LCK_MTX_ASSERT_NOTOWNED);
RT_REMREF(rt);
goto again;
}
+ lck_rw_done(nd_if_rwlock);
ln->ln_state = ND6_LLINFO_STALE; /* XXX */
- ln->ln_expire = timenow.tv_sec + nd6_gctimer;
+ ln->ln_expire = rt_expiry(rt, timenow.tv_sec,
+ nd6_gctimer);
RT_UNLOCK(rt);
break;
case ND6_LLINFO_PROBE:
if (ln->ln_asked < nd6_umaxtries) {
ln->ln_asked++;
+ lck_rw_lock_shared(nd_if_rwlock);
ln->ln_expire = timenow.tv_sec +
- ndi.retrans / 1000;
+ nd_ifinfo[ifp->if_index].retrans / 1000;
+ lck_rw_done(nd_if_rwlock);
RT_ADDREF_LOCKED(rt);
RT_UNLOCK(rt);
lck_mtx_unlock(rnh_lock);
nd6_ns_output(ifp, &dst->sin6_addr,
- &dst->sin6_addr, ln, 0, 0);
+ &dst->sin6_addr, ln, 0);
RT_REMREF(rt);
} else {
RT_UNLOCK(rt);
if (dr->expire && dr->expire < timenow.tv_sec) {
struct nd_defrouter *t;
t = TAILQ_NEXT(dr, dr_entry);
- defrtrlist_del(dr, 1);
+ defrtrlist_del(dr);
dr = t;
} else {
dr = TAILQ_NEXT(dr, dr_entry);
}
}
+ lck_mtx_unlock(nd6_mutex);
/*
* expire interface addresses.
* However, from a stricter speci-confrmance standpoint, we should
* rather separate address lifetimes and prefix lifetimes.
*/
- addrloop:
+addrloop:
+ lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
for (ia6 = in6_ifaddrs; ia6; ia6 = nia6) {
nia6 = ia6->ia_next;
+ IFA_LOCK(&ia6->ia_ifa);
+ /*
+ * Extra reference for ourselves; it's no-op if
+ * we don't have to regenerate temporary address,
+ * otherwise it protects the address from going
+ * away since we drop in6_ifaddr_rwlock below.
+ */
+ IFA_ADDREF_LOCKED(&ia6->ia_ifa);
/* check address lifetime */
lt6 = &ia6->ia6_lifetime;
if (IFA6_IS_INVALID(ia6)) {
- int regen = 0;
-
- /*
- * Extra reference for ourselves; it's no-op if
- * we don't have to regenerate temporary address,
- * otherwise it protects the address from going
- * away since we drop nd6_mutex below.
- */
- ifaref(&ia6->ia_ifa);
-
/*
* If the expiring address is temporary, try
* regenerating a new one. This would be useful when
* hang. This is safe because the goto addrloop
* leads to a reevaluation of the in6_ifaddrs list
*/
- lck_mtx_unlock(nd6_mutex);
- if (regen_tmpaddr(ia6) == 0)
- regen = 1;
- lck_mtx_lock(nd6_mutex);
+ IFA_UNLOCK(&ia6->ia_ifa);
+ lck_rw_done(&in6_ifaddr_rwlock);
+ (void) regen_tmpaddr(ia6);
+ } else {
+ IFA_UNLOCK(&ia6->ia_ifa);
+ lck_rw_done(&in6_ifaddr_rwlock);
}
- in6_purgeaddr(&ia6->ia_ifa, 1);
+ /*
+ * Purging the address would have caused
+ * in6_ifaddr_rwlock to be dropped and reacquired;
+ * therefore search again from the beginning
+ * of in6_ifaddrs list.
+ */
+ in6_purgeaddr(&ia6->ia_ifa);
/* Release extra reference taken above */
- ifafree(&ia6->ia_ifa);
-
- if (regen)
- goto addrloop; /* XXX: see below */
+ IFA_REMREF(&ia6->ia_ifa);
+ goto addrloop;
}
+ IFA_LOCK_ASSERT_HELD(&ia6->ia_ifa);
if (IFA6_IS_DEPRECATED(ia6)) {
int oldflags = ia6->ia6_flags;
(oldflags & IN6_IFF_DEPRECATED) == 0) {
/* see NOTE above */
- lck_mtx_unlock(nd6_mutex);
+ IFA_UNLOCK(&ia6->ia_ifa);
+ lck_rw_done(&in6_ifaddr_rwlock);
if (regen_tmpaddr(ia6) == 0) {
/*
* A new temporary address is
* loop just for safety. Or does this
* significantly reduce performance??
*/
- lck_mtx_lock(nd6_mutex);
+ /* Release extra reference */
+ IFA_REMREF(&ia6->ia_ifa);
goto addrloop;
}
- lck_mtx_lock(nd6_mutex);
+ lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
+ } else {
+ IFA_UNLOCK(&ia6->ia_ifa);
}
} else {
/*
* preferred.
*/
ia6->ia6_flags &= ~IN6_IFF_DEPRECATED;
+ IFA_UNLOCK(&ia6->ia_ifa);
}
+ lck_rw_assert(&in6_ifaddr_rwlock, LCK_RW_ASSERT_EXCLUSIVE);
+ /* Release extra reference taken above */
+ IFA_REMREF(&ia6->ia_ifa);
+ }
+ lck_rw_done(&in6_ifaddr_rwlock);
+
+ lck_mtx_lock(nd6_mutex);
+ /*
+ * Since we drop the nd6_mutex in prelist_remove, we want to run this
+ * section single threaded.
+ */
+ while (nd6_drain_busy) {
+ nd6_drain_waiters++;
+ msleep(nd6_drain_waitchan, nd6_mutex, (PZERO-1),
+ __func__, NULL);
+ lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_OWNED);
}
+ nd6_drain_busy = TRUE;
/* expire prefix list */
pr = nd_prefix.lh_first;
* since pltime is just for autoconf, pltime processing for
* prefix is not necessary.
*/
+ NDPR_LOCK(pr);
+ if (pr->ndpr_stateflags & NDPRF_PROCESSED) {
+ NDPR_UNLOCK(pr);
+ pr = pr->ndpr_next;
+ continue;
+ }
if (pr->ndpr_expire && pr->ndpr_expire < timenow.tv_sec) {
- struct nd_prefix *t;
- t = pr->ndpr_next;
-
/*
* address expiration and prefix expiration are
* separate. NEVER perform in6_purgeaddr here.
*/
-
- prelist_remove(pr, 1);
- pr = t;
- } else
+ pr->ndpr_stateflags |= NDPRF_PROCESSED;
+ NDPR_ADDREF_LOCKED(pr);
+ prelist_remove(pr);
+ NDPR_UNLOCK(pr);
+ NDPR_REMREF(pr);
+ pr = nd_prefix.lh_first;
+ } else {
+ pr->ndpr_stateflags |= NDPRF_PROCESSED;
+ NDPR_UNLOCK(pr);
pr = pr->ndpr_next;
+ }
+ }
+ LIST_FOREACH(pr, &nd_prefix, ndpr_entry) {
+ NDPR_LOCK(pr);
+ pr->ndpr_stateflags &= ~NDPRF_PROCESSED;
+ NDPR_UNLOCK(pr);
+ }
+ nd6_drain_busy = FALSE;
+ if (nd6_drain_waiters > 0) {
+ nd6_drain_waiters = 0;
+ wakeup(nd6_drain_waitchan);
}
lck_mtx_unlock(nd6_mutex);
+}
+
+/*
+ * ND6 timer routine to expire default route list and prefix list
+ */
+void
+nd6_timer(__unused void *ignored_arg)
+{
+ nd6_drain(NULL);
timeout(nd6_timer, (caddr_t)0, nd6_prune * hz);
}
getmicrotime(&timenow);
ifp = ia6->ia_ifa.ifa_ifp;
- ifnet_lock_exclusive(ifp);
+ ifnet_lock_shared(ifp);
for (ifa = ifp->if_addrlist.tqh_first; ifa;
ifa = ifa->ifa_list.tqe_next)
{
struct in6_ifaddr *it6;
- if (ifa->ifa_addr->sa_family != AF_INET6)
+ IFA_LOCK(ifa);
+ if (ifa->ifa_addr->sa_family != AF_INET6) {
+ IFA_UNLOCK(ifa);
continue;
-
+ }
it6 = (struct in6_ifaddr *)ifa;
/* ignore no autoconf addresses. */
- if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0)
+ if ((it6->ia6_flags & IN6_IFF_AUTOCONF) == 0) {
+ IFA_UNLOCK(ifa);
continue;
-
+ }
/* ignore autoconf addresses with different prefixes. */
- if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr)
+ if (it6->ia6_ndpr == NULL || it6->ia6_ndpr != ia6->ia6_ndpr) {
+ IFA_UNLOCK(ifa);
continue;
-
+ }
/*
* Now we are looking at an autoconf address with the same
* prefix as ours. If the address is temporary and is still
*/
if ((it6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
!IFA6_IS_DEPRECATED(it6)) {
+ IFA_UNLOCK(ifa);
+ if (public_ifa6 != NULL)
+ IFA_REMREF(&public_ifa6->ia_ifa);
public_ifa6 = NULL;
break;
}
* loop here, because there may be a still-preferred temporary
* address with the prefix.
*/
- if (!IFA6_IS_DEPRECATED(it6))
- public_ifa6 = it6;
+ if (!IFA6_IS_DEPRECATED(it6)) {
+ IFA_ADDREF_LOCKED(ifa); /* for public_ifa6 */
+ IFA_UNLOCK(ifa);
+ if (public_ifa6 != NULL)
+ IFA_REMREF(&public_ifa6->ia_ifa);
+ public_ifa6 = it6;
+ } else {
+ IFA_UNLOCK(ifa);
+ }
}
ifnet_lock_done(ifp);
if ((e = in6_tmpifadd(public_ifa6, 0, M_WAITOK)) != 0) {
log(LOG_NOTICE, "regen_tmpaddr: failed to create a new"
" tmp addr,errno=%d\n", e);
+ IFA_REMREF(&public_ifa6->ia_ifa);
return(-1);
}
+ IFA_REMREF(&public_ifa6->ia_ifa);
return(0);
}
struct ifnet *ifp)
{
struct llinfo_nd6 *ln;
- struct nd_defrouter *dr, *ndr, drany;
+ struct nd_defrouter *dr, *ndr;
struct nd_prefix *pr, *npr;
/* Nuke default router list entries toward ifp */
*/
for (dr = TAILQ_NEXT(dr, dr_entry); dr; dr = ndr) {
ndr = TAILQ_NEXT(dr, dr_entry);
+ if (dr->stateflags & NDDRF_INSTALLED)
+ continue;
if (dr->ifp == ifp)
- defrtrlist_del(dr, 1);
+ defrtrlist_del(dr);
}
dr = TAILQ_FIRST(&nd_defrouter);
if (dr->ifp == ifp)
- defrtrlist_del(dr, 1);
+ defrtrlist_del(dr);
+ }
+
+ for (dr = TAILQ_FIRST(&nd_defrouter); dr; dr = ndr) {
+ ndr = TAILQ_NEXT(dr, dr_entry);
+ if (!(dr->stateflags & NDDRF_INSTALLED))
+ continue;
+
+ if (dr->ifp == ifp)
+ defrtrlist_del(dr);
}
/* Nuke prefix list entries toward ifp */
for (pr = nd_prefix.lh_first; pr; pr = npr) {
npr = pr->ndpr_next;
+ NDPR_LOCK(pr);
if (pr->ndpr_ifp == ifp) {
+ /*
+ * Because if_detach() does *not* release prefixes
+ * while purging addresses the reference count will
+ * still be above zero. We therefore reset it to
+ * make sure that the prefix really gets purged.
+ */
+ pr->ndpr_addrcnt = 0;
+
/*
* Previously, pr->ndpr_addr is removed as well,
* but I strongly believe we don't have to do it.
* by itself.
* (jinmei@kame.net 20010129)
*/
- prelist_remove(pr, 1);
+ NDPR_ADDREF_LOCKED(pr);
+ prelist_remove(pr);
+ NDPR_UNLOCK(pr);
+ NDPR_REMREF(pr);
+ } else {
+ NDPR_UNLOCK(pr);
}
}
+ lck_mtx_unlock(nd6_mutex);
/* cancel default outgoing interface setting */
if (nd6_defifindex == ifp->if_index) {
- /* Release nd6_mutex as it will be acquired
- * during nd6_setdefaultiface again
- */
- lck_mtx_unlock(nd6_mutex);
nd6_setdefaultiface(0);
- lck_mtx_lock(nd6_mutex);
}
if (!ip6_forwarding && (ip6_accept_rtadv || (ifp->if_eflags & IFEF_ACCEPT_RTADVD))) {
+ lck_mtx_lock(nd6_mutex);
/* refresh default router list */
- bzero(&drany, sizeof(drany));
- defrouter_delreq(&drany, 0);
- defrouter_select();
+ defrouter_reset();
+ defrouter_select(ifp);
+ lck_mtx_unlock(nd6_mutex);
}
- lck_mtx_unlock(nd6_mutex);
/*
* Nuke neighbor cache entries for the ifp.
{
struct rtentry *rt;
struct sockaddr_in6 sin6;
+ unsigned int ifscope;
bzero(&sin6, sizeof(sin6));
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_family = AF_INET6;
sin6.sin6_addr = *addr6;
-#if SCOPEDROUTING
- sin6.sin6_scope_id = in6_addr2scopeid(ifp, addr6);
-#endif
- if (rt_locked)
- lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_OWNED);
- rt = rt_locked ? rtalloc1_locked((struct sockaddr *)&sin6, create, 0) :
- rtalloc1((struct sockaddr *)&sin6, create, 0);
+ ifscope = (ifp != NULL) ? ifp->if_index : IFSCOPE_NONE;
+ if (rt_locked) {
+ lck_mtx_assert(rnh_lock, LCK_MTX_ASSERT_OWNED);
+ rt = rtalloc1_scoped_locked((struct sockaddr *)&sin6,
+ create, 0, ifscope);
+ } else {
+ rt = rtalloc1_scoped((struct sockaddr *)&sin6,
+ create, 0, ifscope);
+ }
if (rt != NULL) {
RT_LOCK(rt);
if ((rt->rt_flags & RTF_LLINFO) == 0) {
/*
- * This is the case for the default route. If we
- * want to create a neighbor cache for the address,
- * we should free the route for the destination and
- * allocate an interface route.
+ * This is the case for the default route.
+ * If we want to create a neighbor cache for the
+ * address, we should free the route for the
+ * destination and allocate an interface route.
*/
if (create) {
RT_UNLOCK(rt);
if (rt == NULL) {
if (create && ifp) {
struct ifaddr *ifa;
+ u_int32_t ifa_flags;
int e;
/*
*/
if (!rt_locked)
lck_mtx_lock(rnh_lock);
- if ((e = rtrequest_locked(RTM_ADD,
+ IFA_LOCK_SPIN(ifa);
+ ifa_flags = ifa->ifa_flags;
+ IFA_UNLOCK(ifa);
+ if ((e = rtrequest_scoped_locked(RTM_ADD,
(struct sockaddr *)&sin6, ifa->ifa_addr,
(struct sockaddr *)&all1_sa,
- (ifa->ifa_flags | RTF_HOST | RTF_LLINFO) &
- ~RTF_CLONING, &rt)) != 0) {
+ (ifa_flags | RTF_HOST | RTF_LLINFO) &
+ ~RTF_CLONING, &rt, ifscope)) != 0) {
if (e != EEXIST)
log(LOG_ERR, "%s: failed to add route "
"for a neighbor(%s), errno=%d\n",
}
if (!rt_locked)
lck_mtx_unlock(rnh_lock);
- ifafree(ifa);
+ IFA_REMREF(ifa);
if (rt == NULL)
return(NULL);
* it might be the loopback interface if the entry is for our
* own address on a non-loopback interface. Instead, we should
* use rt->rt_ifa->ifa_ifp, which would specify the REAL
- * interface.
+ * interface.
+ * Note also that ifa_ifp and ifp may differ when we connect two
+ * interfaces to a same link, install a link prefix to an interface,
+ * and try to install a neighbor cache on an interface that does not
+ * have a route to the prefix.
*/
- if (((ifp && (ifp->if_type != IFT_PPP)) && ((ifp->if_eflags & IFEF_NOAUTOIPV6LL) == 0)) &&
- ((rt->rt_flags & RTF_GATEWAY) || (rt->rt_flags & RTF_LLINFO) == 0 ||
+ if (ifp == NULL ||
+ (rt->rt_flags & RTF_GATEWAY) || (rt->rt_flags & RTF_LLINFO) == 0 ||
rt->rt_gateway->sa_family != AF_LINK || rt->rt_llinfo == NULL ||
- (ifp && rt->rt_ifa->ifa_ifp != ifp))) {
+ (ifp && rt->rt_ifa->ifa_ifp != ifp)) {
RT_REMREF_LOCKED(rt);
RT_UNLOCK(rt);
if (create) {
}
/*
- * Detect if a given IPv6 address identifies a neighbor on a given link.
- * XXX: should take care of the destination of a p2p link?
+ * Test whether a given IPv6 address is a neighbor or not, ignoring
+ * the actual neighbor cache. The neighbor cache is ignored in order
+ * to not reenter the routing code from within itself.
*/
-int
-nd6_is_addr_neighbor(
+static int
+nd6_is_new_addr_neighbor(
struct sockaddr_in6 *addr,
- struct ifnet *ifp,
- int rt_locked)
+ struct ifnet *ifp)
{
- struct ifaddr *ifa;
- struct rtentry *rt;
- int i;
+ struct nd_prefix *pr;
+ struct ifaddr *dstaddr;
-#define IFADDR6(a) ((((struct in6_ifaddr *)(a))->ia_addr).sin6_addr)
-#define IFMASK6(a) ((((struct in6_ifaddr *)(a))->ia_prefixmask).sin6_addr)
+ lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_OWNED);
/*
* A link-local address is always a neighbor.
- * XXX: we should use the sin6_scope_id field rather than the embedded
- * interface index.
+ * XXX: a link does not necessarily specify a single interface.
*/
- if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr) &&
- ntohs(*(u_int16_t *)&addr->sin6_addr.s6_addr[2]) == ifp->if_index)
- return(1);
+ if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
+ struct sockaddr_in6 sin6_copy;
+ u_int32_t zone;
+
+ /*
+ * We need sin6_copy since sa6_recoverscope() may modify the
+ * content (XXX).
+ */
+ sin6_copy = *addr;
+ if (sa6_recoverscope(&sin6_copy))
+ return (0); /* XXX: should be impossible */
+ if (in6_setscope(&sin6_copy.sin6_addr, ifp, &zone))
+ return (0);
+ if (sin6_copy.sin6_scope_id == zone)
+ return (1);
+ else
+ return (0);
+ }
/*
* If the address matches one of our addresses,
* it should be a neighbor.
+ * If the address matches one of our on-link prefixes, it should be a
+ * neighbor.
*/
- ifnet_lock_shared(ifp);
- for (ifa = ifp->if_addrlist.tqh_first;
- ifa;
- ifa = ifa->ifa_list.tqe_next)
- {
- if (ifa->ifa_addr->sa_family != AF_INET6)
+ for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next) {
+ NDPR_LOCK(pr);
+ if (pr->ndpr_ifp != ifp) {
+ NDPR_UNLOCK(pr);
continue;
+ }
+ if (!(pr->ndpr_stateflags & NDPRF_ONLINK)) {
+ NDPR_UNLOCK(pr);
+ continue;
+ }
+ if (IN6_ARE_MASKED_ADDR_EQUAL(&pr->ndpr_prefix.sin6_addr,
+ &addr->sin6_addr, &pr->ndpr_mask)) {
+ NDPR_UNLOCK(pr);
+ return (1);
+ }
+ NDPR_UNLOCK(pr);
+ }
- for (i = 0; i < 4; i++) {
- if ((IFADDR6(ifa).s6_addr32[i] ^
- addr->sin6_addr.s6_addr32[i]) &
- IFMASK6(ifa).s6_addr32[i])
- continue;
+ /*
+ * If the address is assigned on the node of the other side of
+ * a p2p interface, the address should be a neighbor.
+ */
+ dstaddr = ifa_ifwithdstaddr((struct sockaddr *)addr);
+ if (dstaddr != NULL) {
+ if (dstaddr->ifa_ifp == ifp) {
+ IFA_REMREF(dstaddr);
+ return (1);
}
- ifnet_lock_done(ifp);
- return(1);
+ IFA_REMREF(dstaddr);
+ dstaddr = NULL;
}
- ifnet_lock_done(ifp);
+
+ /*
+ * If the default router list is empty, all addresses are regarded
+ * as on-link, and thus, as a neighbor.
+ * XXX: we restrict the condition to hosts, because routers usually do
+ * not have the "default router list".
+ */
+ if (!ip6_forwarding && TAILQ_FIRST(&nd_defrouter) == NULL &&
+ nd6_defifindex == ifp->if_index) {
+ return (1);
+ }
+
+ return (0);
+}
+
+
+/*
+ * Detect if a given IPv6 address identifies a neighbor on a given link.
+ * XXX: should take care of the destination of a p2p link?
+ */
+int
+nd6_is_addr_neighbor(struct sockaddr_in6 *addr, struct ifnet *ifp, int rt_locked)
+{
+ struct rtentry *rt;
+
+ lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_NOTOWNED);
+ lck_mtx_lock(nd6_mutex);
+ if (nd6_is_new_addr_neighbor(addr, ifp)) {
+ lck_mtx_unlock(nd6_mutex);
+ return (1);
+ }
+ lck_mtx_unlock(nd6_mutex);
/*
* Even if the address matches none of our addresses, it might be
- * in the neighbor cache. Callee returns a locked route upon
- * success.
+ * in the neighbor cache.
*/
if ((rt = nd6_lookup(&addr->sin6_addr, 0, ifp, rt_locked)) != NULL) {
RT_LOCK_ASSERT_HELD(rt);
RT_REMREF_LOCKED(rt);
RT_UNLOCK(rt);
- return(1);
+ return (1);
}
- return(0);
-#undef IFADDR6
-#undef IFMASK6
+ return (0);
}
/*
* Free an nd6 llinfo entry.
+ * Since the function would cause significant changes in the kernel, DO NOT
+ * make it global, unless you have a strong reason for the change, and are sure
+ * that the change is safe.
*/
void
nd6_free(
* See a corresponding comment in nd6_na_input().
*/
RT_UNLOCK(rt);
+ lck_mtx_unlock(nd6_mutex);
rt6_flush(&in6, rt->rt_ifp);
+ lck_mtx_lock(nd6_mutex);
} else {
RT_UNLOCK(rt);
}
if (dr) {
+ NDDR_REMREF(dr);
/*
* Unreachablity of a router might affect the default
* router selection and on-link detection of advertised
* the check now.
*/
RT_UNLOCK(rt);
- pfxlist_onlink_check(1);
+ pfxlist_onlink_check();
- if (dr == TAILQ_FIRST(&nd_defrouter)) {
- /*
- * It is used as the current default router,
- * so we have to move it to the end of the
- * list and choose a new one.
- * XXX: it is not very efficient if this is
- * the only router.
- */
- TAILQ_REMOVE(&nd_defrouter, dr, dr_entry);
- TAILQ_INSERT_TAIL(&nd_defrouter, dr, dr_entry);
-
- defrouter_select();
- }
+ /*
+ * refresh default router list
+ */
+ defrouter_select(rt->rt_ifp);
}
RT_LOCK_ASSERT_NOTHELD(rt);
} else {
/*
* Upper-layer reachability hint for Neighbor Unreachability Detection.
*
- * XXX cost-effective metods?
+ * XXX cost-effective methods?
*/
void
nd6_nud_hint(
if (!nd6_need_cache(ifp)) { /* stf case */
no_nd_cache = 1;
} else {
+ struct sockaddr_in6 sin6;
+
+ rtkey_to_sa6(rt, &sin6);
/*
* nd6_is_addr_neighbor() may call nd6_lookup(),
* therefore we drop rt_lock to avoid deadlock
- * during the lookup. Using rt_key(rt) is still
- * safe because it won't change while rnh_lock
- * is held.
+ * during the lookup.
*/
RT_ADDREF_LOCKED(rt);
RT_UNLOCK(rt);
- no_nd_cache = !nd6_is_addr_neighbor(
- (struct sockaddr_in6 *)rt_key(rt), ifp, 1);
+ no_nd_cache = !nd6_is_addr_neighbor(&sin6, ifp, 1);
RT_LOCK(rt);
RT_REMREF_LOCKED(rt);
}
* SIN(rt_mask(rt))->sin_addr.s_addr != 0xffffffff)
* rt->rt_flags |= RTF_CLONING;
*/
- if (rt->rt_flags & (RTF_CLONING | RTF_LLINFO)) {
+ if ((rt->rt_flags & RTF_CLONING) ||
+ ((rt->rt_flags & RTF_LLINFO) && ln == NULL)) {
/*
- * Case 1: This route should come from
- * a route to interface. RTF_LLINFO flag is set
- * for a host route whose destination should be
- * treated as on-link.
+ * Case 1: This route should come from a route to
+ * interface (RTF_CLONING case) or the route should be
+ * treated as on-link but is currently not
+ * (RTF_LLINFO && ln == NULL case).
*/
if (rt_setgate(rt, rt_key(rt),
(struct sockaddr *)&null_sdl) == 0) {
* (or should we allow proxy ND configuration only for
* routers? there's no mention about proxy ND from hosts)
*/
-#if 0
- /* XXX it does not work */
- if (rt->rt_flags & RTF_ANNOUNCE)
- nd6_na_output(ifp,
- &SIN6(rt_key(rt))->sin6_addr,
- &SIN6(rt_key(rt))->sin6_addr,
- ip6_forwarding ? ND_NA_FLAG_ROUTER : 0,
- 1, NULL);
-#endif
/* FALLTHROUGH */
case RTM_RESOLVE:
if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) {
*/
if (gate->sa_family != AF_LINK ||
gate->sa_len < sizeof(null_sdl)) {
- log(LOG_DEBUG,
- "nd6_rtrequest: bad gateway value: %s\n",
- if_name(ifp));
+ /* Don't complain in case of RTM_ADD */
+ if (req == RTM_RESOLVE) {
+ log(LOG_DEBUG,
+ "nd6_rtrequest: bad gateway "
+ "value: %s\n", if_name(ifp));
+ }
break;
}
SDL(gate)->sdl_type = ifp->if_type;
log(LOG_DEBUG, "nd6_rtrequest: malloc failed\n");
break;
}
+ rt->rt_llinfo_get_ri = nd6_llinfo_get_ri;
+ rt->rt_llinfo_purge = nd6_llinfo_purge;
rt->rt_llinfo_free = nd6_llinfo_free;
nd6_inuse++;
SDL(gate)->sdl_alen = ifp->if_addrlen;
}
if (nd6_useloopback) {
+ if (rt->rt_ifp != lo_ifp) {
+ /*
+ * Purge any link-layer info caching.
+ */
+ if (rt->rt_llinfo_purge != NULL)
+ rt->rt_llinfo_purge(rt);
+
+ /*
+ * Adjust route ref count for the
+ * interfaces.
+ */
+ if (rt->rt_if_ref_fn != NULL) {
+ rt->rt_if_ref_fn(lo_ifp, 1);
+ rt->rt_if_ref_fn(rt->rt_ifp, -1);
+ }
+ }
rt->rt_ifp = lo_ifp; /* XXX */
/*
* Make sure rt_ifa be equal to the ifaddr
rtsetifa(rt, ifa);
}
}
- ifafree(ifa);
+ IFA_REMREF(ifa);
} else if (rt->rt_flags & RTF_ANNOUNCE) {
ln->ln_expire = 0;
ln->ln_state = ND6_LLINFO_REACHABLE;
/* join solicited node multicast for proxy ND */
if (ifp->if_flags & IFF_MULTICAST) {
struct in6_addr llsol;
+ struct in6_multi *in6m;
int error;
llsol = SIN6(rt_key(rt))->sin6_addr;
- llsol.s6_addr16[0] = htons(0xff02);
- llsol.s6_addr16[1] = htons(ifp->if_index);
+ llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
llsol.s6_addr32[1] = 0;
llsol.s6_addr32[2] = htonl(1);
llsol.s6_addr8[12] = 0xff;
-
- if (!in6_addmulti(&llsol, ifp, &error, 0)) {
+ if (in6_setscope(&llsol, ifp, NULL))
+ break;
+ error = in6_mc_join(ifp, &llsol, NULL, &in6m, 0);
+ if (error) {
nd6log((LOG_ERR, "%s: failed to join "
"%s (errno=%d)\n", if_name(ifp),
ip6_sprintf(&llsol), error));
+ } else {
+ IN6M_REMREF(in6m);
}
}
}
break;
case RTM_DELETE:
- if (!ln)
+ if (ln == NULL)
break;
/* leave from solicited node multicast for proxy ND */
if ((rt->rt_flags & RTF_ANNOUNCE) != 0 &&
struct in6_multi *in6m;
llsol = SIN6(rt_key(rt))->sin6_addr;
- llsol.s6_addr16[0] = htons(0xff02);
- llsol.s6_addr16[1] = htons(ifp->if_index);
+ llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
llsol.s6_addr32[1] = 0;
llsol.s6_addr32[2] = htonl(1);
llsol.s6_addr8[12] = 0xff;
-
- ifnet_lock_shared(ifp);
- IN6_LOOKUP_MULTI(llsol, ifp, in6m);
- ifnet_lock_done(ifp);
- if (in6m)
- in6_delmulti(in6m, 0);
+ if (in6_setscope(&llsol, ifp, NULL) == 0) {
+ in6_multihead_lock_shared();
+ IN6_LOOKUP_MULTI(&llsol, ifp, in6m);
+ in6_multihead_lock_done();
+ if (in6m != NULL) {
+ in6_mc_leave(in6m, NULL);
+ IN6M_REMREF(in6m);
+ }
+ }
}
nd6_inuse--;
/*
*/
if (ln->ln_flags & ND6_LNF_IN_USE)
LN_DEQUEUE(ln);
+
+ /*
+ * Purge any link-layer info caching.
+ */
+ if (rt->rt_llinfo_purge != NULL)
+ rt->rt_llinfo_purge(rt);
+
rt->rt_flags &= ~RTF_LLINFO;
- if (ln->ln_hold != NULL)
+ if (ln->ln_hold != NULL) {
m_freem(ln->ln_hold);
- ln->ln_hold = NULL;
+ ln->ln_hold = NULL;
+ }
}
}
struct in6_prlist_64 *prl_64 = (struct in6_prlist_64 *)data;
struct in6_prlist_32 *prl_32 = (struct in6_prlist_32 *)data;
struct nd_prefix *pr;
- struct rr_prefix *rpp;
int i = 0;
lck_mtx_assert(nd6_mutex, LCK_MTX_ASSERT_OWNED);
struct nd_pfxrouter *pfr;
int j;
+ NDPR_LOCK(pr);
(void) in6_embedscope(&prl_64->prefix[i].prefix,
- &pr->ndpr_prefix, NULL, NULL);
+ &pr->ndpr_prefix, NULL, NULL, NULL);
prl_64->prefix[i].raflags = pr->ndpr_raf;
prl_64->prefix[i].prefixlen = pr->ndpr_plen;
prl_64->prefix[i].vltime = pr->ndpr_vltime;
}
prl_64->prefix[i].advrtrs = j;
prl_64->prefix[i].origin = PR_ORIG_RA;
+ NDPR_UNLOCK(pr);
i++;
pr = pr->ndpr_next;
}
- for (rpp = LIST_FIRST(&rr_prefix); rpp;
- rpp = LIST_NEXT(rpp, rp_entry)) {
- if (i >= PRLSTSIZ)
- break;
- (void) in6_embedscope(&prl_64->prefix[i].prefix,
- &pr->ndpr_prefix, NULL, NULL);
- prl_64->prefix[i].raflags = rpp->rp_raf;
- prl_64->prefix[i].prefixlen = rpp->rp_plen;
- prl_64->prefix[i].vltime = rpp->rp_vltime;
- prl_64->prefix[i].pltime = rpp->rp_pltime;
- prl_64->prefix[i].if_index = rpp->rp_ifp->if_index;
- prl_64->prefix[i].expire = rpp->rp_expire;
- prl_64->prefix[i].advrtrs = 0;
- prl_64->prefix[i].origin = rpp->rp_origin;
- i++;
- }
return;
}
/* For 32-bit process */
struct nd_pfxrouter *pfr;
int j;
+ NDPR_LOCK(pr);
(void) in6_embedscope(&prl_32->prefix[i].prefix,
- &pr->ndpr_prefix, NULL, NULL);
+ &pr->ndpr_prefix, NULL, NULL, NULL);
prl_32->prefix[i].raflags = pr->ndpr_raf;
prl_32->prefix[i].prefixlen = pr->ndpr_plen;
prl_32->prefix[i].vltime = pr->ndpr_vltime;
}
prl_32->prefix[i].advrtrs = j;
prl_32->prefix[i].origin = PR_ORIG_RA;
+ NDPR_UNLOCK(pr);
i++;
pr = pr->ndpr_next;
}
-
- for (rpp = LIST_FIRST(&rr_prefix); rpp;
- rpp = LIST_NEXT(rpp, rp_entry)) {
- if (i >= PRLSTSIZ)
- break;
- (void) in6_embedscope(&prl_32->prefix[i].prefix,
- &pr->ndpr_prefix, NULL, NULL);
- prl_32->prefix[i].raflags = rpp->rp_raf;
- prl_32->prefix[i].prefixlen = rpp->rp_plen;
- prl_32->prefix[i].vltime = rpp->rp_vltime;
- prl_32->prefix[i].pltime = rpp->rp_pltime;
- prl_32->prefix[i].if_index = rpp->rp_ifp->if_index;
- prl_32->prefix[i].expire = rpp->rp_expire;
- prl_32->prefix[i].advrtrs = 0;
- prl_32->prefix[i].origin = rpp->rp_origin;
- i++;
- }
}
int
{
struct in6_ndireq *ndi = (struct in6_ndireq *)data;
struct in6_ondireq *ondi = (struct in6_ondireq *)data;
- struct nd_defrouter *dr, any;
+ struct nd_defrouter *dr;
struct nd_prefix *pr;
struct rtentry *rt;
int i = ifp->if_index, error = 0;
ondi->ndi.flags = nd_ifinfo[i].flags;
ondi->ndi.recalctm = nd_ifinfo[i].recalctm;
ondi->ndi.chlim = nd_ifinfo[i].chlim;
- ondi->ndi.receivedra = nd_ifinfo[i].receivedra;
lck_rw_done(nd_if_rwlock);
break;
* xxx sumikawa: should not delete route if default
* route equals to the top of default router list
*/
- bzero(&any, sizeof(any));
lck_mtx_lock(nd6_mutex);
- defrouter_delreq(&any, 1);
- defrouter_select();
+ defrouter_reset();
+ defrouter_select(ifp);
lck_mtx_unlock(nd6_mutex);
/* xxx sumikawa: flush prefix list */
break;
case SIOCSPFXFLUSH_IN6: {
/* flush all the prefix advertised by routers */
struct nd_prefix *next;
- lck_mtx_lock(nd6_mutex);
+ lck_mtx_lock(nd6_mutex);
for (pr = nd_prefix.lh_first; pr; pr = next) {
- struct in6_ifaddr *ia, *ia_next;
+ struct in6_ifaddr *ia;
next = pr->ndpr_next;
- if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr))
+ NDPR_LOCK(pr);
+ if (IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_prefix.sin6_addr)) {
+ NDPR_UNLOCK(pr);
continue; /* XXX */
-
+ }
+ if (ifp != lo_ifp && pr->ndpr_ifp != ifp) {
+ NDPR_UNLOCK(pr);
+ continue;
+ }
/* do we really have to remove addresses as well? */
- for (ia = in6_ifaddrs; ia; ia = ia_next) {
- /* ia might be removed. keep the next ptr. */
- ia_next = ia->ia_next;
+ NDPR_ADDREF_LOCKED(pr);
+ NDPR_UNLOCK(pr);
+ lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
+ ia = in6_ifaddrs;
+ while (ia != NULL) {
+ IFA_LOCK(&ia->ia_ifa);
+ if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0) {
+ IFA_UNLOCK(&ia->ia_ifa);
+ ia = ia->ia_next;
+ continue;
+ }
- if ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0)
+ if (ia->ia6_ndpr == pr) {
+ IFA_ADDREF_LOCKED(&ia->ia_ifa);
+ IFA_UNLOCK(&ia->ia_ifa);
+ lck_rw_done(&in6_ifaddr_rwlock);
+ lck_mtx_unlock(nd6_mutex);
+ in6_purgeaddr(&ia->ia_ifa);
+ lck_mtx_lock(nd6_mutex);
+ lck_rw_lock_exclusive(&in6_ifaddr_rwlock);
+ IFA_REMREF(&ia->ia_ifa);
+ /*
+ * Purging the address caused
+ * in6_ifaddr_rwlock to be
+ * dropped and
+ * reacquired; therefore search again
+ * from the beginning of in6_ifaddrs.
+ * The same applies for the prefix list.
+ */
+ ia = in6_ifaddrs;
+ next = nd_prefix.lh_first;
continue;
- if (ia->ia6_ndpr == pr)
- in6_purgeaddr(&ia->ia_ifa, 1);
+ }
+ IFA_UNLOCK(&ia->ia_ifa);
+ ia = ia->ia_next;
}
- prelist_remove(pr, 1);
+ lck_rw_done(&in6_ifaddr_rwlock);
+ NDPR_LOCK(pr);
+ prelist_remove(pr);
+ NDPR_UNLOCK(pr);
+ /*
+ * If we were trying to restart this loop
+ * above by changing the value of 'next', we might
+ * end up freeing the only element on the list
+ * when we call NDPR_REMREF().
+ * When this happens, we also have get out of this
+ * loop because we have nothing else to do.
+ */
+ if (pr == next)
+ next = NULL;
+ NDPR_REMREF(pr);
}
lck_mtx_unlock(nd6_mutex);
break;
*/
for (dr = TAILQ_NEXT(dr, dr_entry); dr; dr = next) {
next = TAILQ_NEXT(dr, dr_entry);
- defrtrlist_del(dr, 1);
+ if (ifp == lo_ifp || dr->ifp == ifp)
+ defrtrlist_del(dr);
}
- defrtrlist_del(TAILQ_FIRST(&nd_defrouter), 1);
+ if (ifp == lo_ifp ||
+ TAILQ_FIRST(&nd_defrouter)->ifp == ifp)
+ defrtrlist_del(TAILQ_FIRST(&nd_defrouter));
}
lck_mtx_unlock(nd6_mutex);
break;
struct in6_ndifreq_64 *ndif_64 = (struct in6_ndifreq_64 *)data;
struct in6_ndifreq_32 *ndif_32 = (struct in6_ndifreq_32 *)data;
- return (nd6_setdefaultiface(cmd == SIOCSDEFIFACE_IN6_64 ?
- ndif_64->ifindex : ndif_32->ifindex));
+ error = nd6_setdefaultiface(cmd == SIOCSDEFIFACE_IN6_64 ?
+ ndif_64->ifindex : ndif_32->ifindex);
+ return (error);
/* NOTREACHED */
}
}
int newstate = 0;
struct timeval timenow;
- if (!ifp)
+ if (ifp == NULL)
panic("ifp == NULL in nd6_cache_lladdr");
- if (!from)
+ if (from == NULL)
panic("from == NULL in nd6_cache_lladdr");
/* nothing must be updated for unspecified address */
rt = nd6_lookup(from, 0, ifp, 0);
if (rt == NULL) {
-#if 0
- /* nothing must be done if there's no lladdr */
- if (!lladdr || !lladdrlen)
- return;
-#endif
-
if ((rt = nd6_lookup(from, 1, ifp, 0)) == NULL)
return;
RT_LOCK_ASSERT_HELD(rt);
is_newentry = 0;
}
+ if (rt == NULL)
+ return;
if ((rt->rt_flags & (RTF_GATEWAY | RTF_LLINFO)) != RTF_LLINFO) {
fail:
RT_UNLOCK(rt);
rtfree(rt);
return;
}
- ln = rt->rt_llinfo;
- if (!ln)
+ ln = (struct llinfo_nd6 *)rt->rt_llinfo;
+ if (ln == NULL)
goto fail;
- if (!rt->rt_gateway)
+ if (rt->rt_gateway == NULL)
goto fail;
if (rt->rt_gateway->sa_family != AF_LINK)
goto fail;
*/
sdl->sdl_alen = ifp->if_addrlen;
bcopy(lladdr, LLADDR(sdl), ifp->if_addrlen);
+
+ /* cache the gateway (sender HW) address */
+ nd6_llreach_alloc(rt, ifp, LLADDR(sdl), sdl->sdl_alen, FALSE);
}
if (!is_newentry) {
- if ((!olladdr && lladdr) /* (3) */
- || (olladdr && lladdr && llchange)) { /* (5) */
+ if ((!olladdr && lladdr != NULL) || /* (3) */
+ (olladdr && lladdr != NULL && llchange)) { /* (5) */
do_update = 1;
newstate = ND6_LLINFO_STALE;
} else /* (1-2,4) */
do_update = 0;
} else {
do_update = 1;
- if (!lladdr) /* (6) */
+ if (lladdr == NULL) /* (6) */
newstate = ND6_LLINFO_NOSTATE;
else /* (7) */
newstate = ND6_LLINFO_STALE;
ln->ln_hold = NULL;
if (m != NULL) {
+ struct sockaddr_in6 sin6;
+
+ rtkey_to_sa6(rt, &sin6);
/*
* we assume ifp is not a p2p here, so just
* set the 2nd argument as the 1st one.
*/
RT_UNLOCK(rt);
- nd6_output(ifp, ifp, m,
- (struct sockaddr_in6 *)rt_key(rt), rt, 0);
+ nd6_output(ifp, ifp, m, &sin6, rt);
RT_LOCK(rt);
}
} else if (ln->ln_state == ND6_LLINFO_INCOMPLETE) {
* 0 n y -- (3) c s s
* 0 y y n (4) c s s
* 0 y y y (5) c s s
- * 1 -- n -- (6) c c c s
+ * 1 -- n -- (6) c c c s
* 1 -- y -- (7) c c s c s
*
* (c=clear s=set)
case ND_REDIRECT:
/*
* If the icmp is a redirect to a better router, always set the
- * is_router flag. Otherwise, if the entry is newly created,
- * clear the flag. [RFC 2461, sec 8.3]
+ * is_router flag. Otherwise, if the entry is newly created,
+ * clear the flag. [RFC 2461, sec 8.3]
*/
if (code == ND_REDIRECT_ROUTER)
ln->ln_router = 1;
/*
* Mark an entry with lladdr as a router.
*/
- if ((!is_newentry && (olladdr || lladdr)) /* (2-5) */
- || (is_newentry && lladdr)) { /* (7) */
+ if ((!is_newentry && (olladdr || lladdr)) || /* (2-5) */
+ (is_newentry && lladdr)) { /* (7) */
ln->ln_router = 1;
}
break;
RT_REMREF_LOCKED(rt);
RT_UNLOCK(rt);
lck_mtx_lock(nd6_mutex);
- defrouter_select();
+ defrouter_select(ifp);
lck_mtx_unlock(nd6_mutex);
} else {
RT_REMREF_LOCKED(rt);
#define senderr(e) { error = (e); goto bad;}
int
nd6_output(struct ifnet *ifp, struct ifnet *origifp, struct mbuf *m0,
- struct sockaddr_in6 *dst, struct rtentry *hint0, int locked)
+ struct sockaddr_in6 *dst, struct rtentry *hint0)
{
struct mbuf *m = m0;
struct rtentry *rt = hint0, *hint = hint0;
if (!(rt->rt_flags & RTF_UP)) {
RT_REMREF_LOCKED(rt);
RT_UNLOCK(rt);
- if ((hint = rt = rtalloc1((struct sockaddr *)dst,
- 1, 0)) != NULL) {
+ if ((hint = rt = rtalloc1_scoped((struct sockaddr *)dst,
+ 1, 0, ifp->if_index)) != NULL) {
RT_LOCK_SPIN(rt);
if (rt->rt_ifp != ifp) {
/* XXX: loop care? */
RT_UNLOCK(rt);
error = nd6_output(ifp, origifp, m0,
- dst, rt, locked);
+ dst, rt);
rtfree(rt);
return (error);
}
struct in6_ifaddr *ia6 = NULL;
struct sockaddr_in6 gw6;
- gw6 = *((struct sockaddr_in6 *)rt->rt_gateway);
+ rtgw_to_sa6(rt, &gw6);
/*
* Must drop rt_lock since nd6_is_addr_neighbor()
* calls nd6_lookup() and acquires rnh_lock.
* XXX: we may need a more generic rule here.
*/
if (ia6 != NULL)
- ifafree(&ia6->ia_ifa);
+ IFA_REMREF(&ia6->ia_ifa);
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
senderr(EHOSTUNREACH);
goto sendpkt;
RT_UNLOCK(rt);
rtfree(gwrt);
lookup:
- gwrt = rtalloc1((struct sockaddr *)&gw6, 1, 0);
+ gwrt = rtalloc1_scoped((struct sockaddr *)&gw6,
+ 1, 0, ifp->if_index);
RT_LOCK(rt);
/*
if (rt && (rt->rt_flags & RTF_LLINFO) != 0) {
ln = rt->rt_llinfo;
} else {
+ struct sockaddr_in6 sin6;
+ /*
+ * Clear out Scope ID field in case it is set.
+ */
+ sin6 = *dst;
+ sin6.sin6_scope_id = 0;
/*
* Since nd6_is_addr_neighbor() internally calls nd6_lookup(),
* the condition below is not very efficient. But we believe
*/
if (rt != NULL)
RT_UNLOCK(rt);
- if (nd6_is_addr_neighbor(dst, ifp, 0)) {
+ if (nd6_is_addr_neighbor(&sin6, ifp, 0)) {
/* "rtrele" may have been used, so clean up "rt" now */
if (rt != NULL) {
/* Don't free "hint0" */
if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
ln->ln_state < ND6_LLINFO_REACHABLE) {
ln->ln_state = ND6_LLINFO_STALE;
- ln->ln_expire = timenow.tv_sec + nd6_gctimer;
+ ln->ln_expire = rt_expiry(rt, timenow.tv_sec, nd6_gctimer);
}
/*
if (ln->ln_state == ND6_LLINFO_STALE) {
ln->ln_asked = 0;
ln->ln_state = ND6_LLINFO_DELAY;
- ln->ln_expire = timenow.tv_sec + nd6_delay;
+ ln->ln_expire = rt_expiry(rt, timenow.tv_sec, nd6_delay);
}
/*
lck_rw_done(nd_if_rwlock);
RT_UNLOCK(rt);
/* We still have a reference on rt (for ln) */
- nd6_ns_output(ifp, NULL, &dst->sin6_addr, ln, 0, locked);
+ nd6_ns_output(ifp, NULL, &dst->sin6_addr, ln, 0);
} else {
RT_UNLOCK(rt);
}
if (rt != NULL)
RT_LOCK_ASSERT_NOTHELD(rt);
- /* Clean up HW checksum flags before sending the packet */
- m->m_pkthdr.csum_data = 0;
- m->m_pkthdr.csum_flags = 0;
+ /* discard the packet if IPv6 operation is disabled on the interface */
+ lck_rw_lock_shared(nd_if_rwlock);
+ if ((nd_ifinfo[ifp->if_index].flags & ND6_IFF_IFDISABLED)) {
+ lck_rw_done(nd_if_rwlock);
+ error = ENETDOWN; /* better error? */
+ goto bad;
+ }
+ lck_rw_done(nd_if_rwlock);
if ((ifp->if_flags & IFF_LOOPBACK) != 0) {
/* forwarding rules require the original scope_id */
m->m_pkthdr.rcvif = origifp;
- if (locked)
- lck_mtx_unlock(ip6_mutex);
error = dlil_output(origifp, PF_INET6, m, (caddr_t)rt,
(struct sockaddr *)dst, 0);
- if (locked)
- lck_mtx_lock(ip6_mutex);
goto release;
} else {
/* Do not allow loopback address to wind up on a wire */
}
}
+ if (rt != NULL) {
+ RT_LOCK_SPIN(rt);
+ /* Mark use timestamp */
+ if (rt->rt_llinfo != NULL)
+ nd6_llreach_use(rt->rt_llinfo);
+ RT_UNLOCK(rt);
+ }
+
+ if (hint && nstat_collect)
+ nstat_route_tx(hint, 1, m->m_pkthdr.len, 0);
+
m->m_pkthdr.rcvif = NULL;
- if (locked)
- lck_mtx_unlock(ip6_mutex);
error = dlil_output(ifp, PF_INET6, m, (caddr_t)rt,
(struct sockaddr *)dst, 0);
- if (locked)
- lck_mtx_lock(ip6_mutex);
goto release;
bad:
#if IFT_IEEE80211
case IFT_IEEE80211:
#endif
- case IFT_BRIDGE:
case IFT_GIF: /* XXX need more cases? */
+ case IFT_PPP:
+#if IFT_TUNNEL
+ case IFT_TUNNEL:
+#endif
+ case IFT_BRIDGE:
+ case IFT_CELLULAR:
return(1);
default:
return(0);
"default router list (%s)\n",
ip6_sprintf(&dr->rtaddr));
d->flags = dr->flags;
+ d->stateflags = dr->stateflags;
+ d->stateflags &= ~NDDRF_PROCESSED;
d->rtlifetime = dr->rtlifetime;
d->expire = dr->expire;
d->if_index = dr->ifp->if_index;
"default router list (%s)\n",
ip6_sprintf(&dr->rtaddr));
d_32->flags = dr->flags;
+ d_32->stateflags = dr->stateflags;
+ d_32->stateflags &= ~NDDRF_PROCESSED;
d_32->rtlifetime = dr->rtlifetime;
d_32->expire = dr->expire;
d_32->if_index = dr->ifp->if_index;
bzero(p, sizeof (*p));
sin6 = (struct sockaddr_in6 *)(p + 1);
+ NDPR_LOCK(pr);
p->prefix = pr->ndpr_prefix;
if (in6_recoverscope(&p->prefix,
&p->prefix.sin6_addr, pr->ndpr_ifp) != 0)
p->pltime = pr->ndpr_pltime;
p->if_index = pr->ndpr_ifp->if_index;
p->expire = pr->ndpr_expire;
- p->refcnt = pr->ndpr_refcnt;
+ p->refcnt = pr->ndpr_addrcnt;
p->flags = pr->ndpr_stateflags;
p->origin = PR_ORIG_RA;
advrtrs = 0;
advrtrs++;
}
p->advrtrs = advrtrs;
+ NDPR_UNLOCK(pr);
} else {
panic("buffer too short");
}
bzero(p_32, sizeof (*p_32));
sin6 = (struct sockaddr_in6 *)(p_32 + 1);
+ NDPR_LOCK(pr);
p_32->prefix = pr->ndpr_prefix;
if (in6_recoverscope(&p_32->prefix,
&p_32->prefix.sin6_addr, pr->ndpr_ifp) != 0)
p_32->pltime = pr->ndpr_pltime;
p_32->if_index = pr->ndpr_ifp->if_index;
p_32->expire = pr->ndpr_expire;
- p_32->refcnt = pr->ndpr_refcnt;
+ p_32->refcnt = pr->ndpr_addrcnt;
p_32->flags = pr->ndpr_stateflags;
p_32->origin = PR_ORIG_RA;
advrtrs = 0;
advrtrs++;
}
p_32->advrtrs = advrtrs;
+ NDPR_UNLOCK(pr);
} else {
panic("buffer too short");
}
return (error);
}
SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_DRLIST, nd6_drlist,
- CTLFLAG_RD, 0, 0, nd6_sysctl_drlist, "S,in6_defrouter","");
+ CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0, nd6_sysctl_drlist, "S,in6_defrouter","");
SYSCTL_PROC(_net_inet6_icmp6, ICMPV6CTL_ND6_PRLIST, nd6_prlist,
- CTLFLAG_RD, 0, 0, nd6_sysctl_prlist, "S,in6_defrouter","");
+ CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0, nd6_sysctl_prlist, "S,in6_defrouter","");
projects / apple / xnu.git / blobdiff