Author: melifaro
Date: Sun Jan 19 16:07:27 2014
New Revision: 260882
URL: http://svnweb.freebsd.org/changeset/base/260882
Log:
Further rework netinet6 address handling code:
* Set ia address/mask values BEFORE attaching to address lists.
Inet6 address assignment is not atomic, so the simplest way to
do this atomically is to fill in ia before attach.
* Validate irfa->ia_addr field before use (we permit ANY sockaddr in old
code).
* Do some renamings:
in6_ifinit -> in6_notify_ifa (interaction with other subsystems is here)
in6_setup_ifa -> in6_broadcast_ifa (LLE/Multicast/DaD code)
in6_ifaddloop -> nd6_add_ifa_lle
in6_ifremloop -> nd6_rem_ifa_lle
* Split working with LLE and route announce code for last two.
Add temporary in6_newaddrmsg() function to mimic current rtsock behaviour.
* Call device SIOCSIFADDR handler IFF we're adding first address.
In IPv4 we have to call it on every address change since ARP record
is installed by arp_ifinit() which is called by given handler.
IPv6 stack, on the opposite is responsible to call nd6_add_ifa_lle() so
there is no reason to call SIOCSIFADDR often.
Modified:
head/sys/netinet/ip_carp.c
head/sys/netinet6/in6.c
head/sys/netinet6/in6_var.h
head/sys/netinet6/nd6.c
head/sys/netinet6/nd6.h
Modified: head/sys/netinet/ip_carp.c
==============================================================================
--- head/sys/netinet/ip_carp.c Sun Jan 19 13:51:46 2014 (r260881)
+++ head/sys/netinet/ip_carp.c Sun Jan 19 16:07:27 2014 (r260882)
@@ -964,7 +964,7 @@ carp_ifa_addroute(struct ifaddr *ifa)
case AF_INET6:
ifa_add_loopback_route(ifa,
(struct sockaddr *)&ifatoia6(ifa)->ia_addr);
- in6_ifaddloop(ifa);
+ nd6_add_ifa_lle(ifatoia6(ifa));
break;
#endif
}
@@ -995,7 +995,7 @@ carp_ifa_delroute(struct ifaddr *ifa)
case AF_INET6:
ifa_del_loopback_route(ifa,
(struct sockaddr *)&ifatoia6(ifa)->ia_addr);
- in6_ifremloop(ifa);
+ nd6_rem_ifa_lle(ifatoia6(ifa));
break;
#endif
}
Modified: head/sys/netinet6/in6.c
==============================================================================
--- head/sys/netinet6/in6.c Sun Jan 19 13:51:46 2014 (r260881)
+++ head/sys/netinet6/in6.c Sun Jan 19 16:07:27 2014 (r260882)
@@ -133,8 +133,8 @@ const struct in6_addr in6mask128 = IN6MA
const struct sockaddr_in6 sa6_any =
{ sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 };
-static int in6_ifinit(struct ifnet *, struct in6_ifaddr *,
- struct sockaddr_in6 *, int);
+static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *,
+ struct in6_aliasreq *, int);
static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *);
int (*faithprefix_p)(struct in6_addr *);
@@ -145,44 +145,26 @@ static struct in6_ifaddr *in6_alloc_ifa(
struct in6_aliasreq *, int flags);
static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *,
struct in6_ifaddr *, int, int);
-static int in6_setup_ifa(struct ifnet *, struct in6_aliasreq *,
+static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
struct in6_ifaddr *, int);
#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
#define ia62ifa(ia6) (&((ia6)->ia_ifa))
+
void
-in6_ifaddloop(struct ifaddr *ifa)
+in6_newaddrmsg(struct in6_ifaddr *ia, int cmd)
{
struct sockaddr_dl gateway;
struct sockaddr_in6 mask, addr;
struct rtentry rt;
- struct in6_ifaddr *ia;
- struct ifnet *ifp;
- struct llentry *ln;
- ia = ifa2ia6(ifa);
- ifp = ifa->ifa_ifp;
- IF_AFDATA_LOCK(ifp);
- ifa->ifa_rtrequest = nd6_rtrequest;
- ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR |
- LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr);
- IF_AFDATA_UNLOCK(ifp);
- if (ln != NULL) {
- ln->la_expire = 0; /* for IPv6 this means permanent */
- ln->ln_state = ND6_LLINFO_REACHABLE;
- /*
- * initialize for rtmsg generation
- */
- bzero(&gateway, sizeof(gateway));
- gateway.sdl_len = sizeof(gateway);
- gateway.sdl_family = AF_LINK;
- gateway.sdl_nlen = 0;
- gateway.sdl_alen = 6;
- memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned,
- sizeof(ln->ll_addr));
- LLE_WUNLOCK(ln);
- }
+ /*
+ * initialize for rtmsg generation
+ */
+ bzero(&gateway, sizeof(gateway));
+ gateway.sdl_len = sizeof(gateway);
+ gateway.sdl_family = AF_LINK;
bzero(&rt, sizeof(rt));
rt.rt_gateway = (struct sockaddr *)&gateway;
@@ -190,42 +172,11 @@ in6_ifaddloop(struct ifaddr *ifa)
memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
rt_mask(&rt) = (struct sockaddr *)&mask;
rt_key(&rt) = (struct sockaddr *)&addr;
- rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC;
+ rt.rt_flags = RTF_HOST | RTF_STATIC;
+ if (cmd == RTM_ADD)
+ rt.rt_flags |= RTF_UP;
/* Announce arrival of local address to all FIBs. */
- rt_newaddrmsg(RTM_ADD, ifa, 0, &rt);
-}
-
-void
-in6_ifremloop(struct ifaddr *ifa)
-{
- struct sockaddr_dl gateway;
- struct sockaddr_in6 mask, addr;
- struct rtentry rt0;
- struct in6_ifaddr *ia;
- struct ifnet *ifp;
-
- ia = ifa2ia6(ifa);
- ifp = ifa->ifa_ifp;
- memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
- memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
- lltable_prefix_free(AF_INET6, (struct sockaddr *)&addr,
- (struct sockaddr *)&mask, LLE_STATIC);
-
- /*
- * initialize for rtmsg generation
- */
- bzero(&gateway, sizeof(gateway));
- gateway.sdl_len = sizeof(gateway);
- gateway.sdl_family = AF_LINK;
- gateway.sdl_nlen = 0;
- gateway.sdl_alen = ifp->if_addrlen;
- bzero(&rt0, sizeof(rt0));
- rt0.rt_gateway = (struct sockaddr *)&gateway;
- rt_mask(&rt0) = (struct sockaddr *)&mask;
- rt_key(&rt0) = (struct sockaddr *)&addr;
- rt0.rt_flags = RTF_HOST | RTF_STATIC;
- /* Announce removal of local address to all FIBs. */
- rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0);
+ rt_newaddrmsg(cmd, &ia->ia_ifa, 0, &rt);
}
int
@@ -1031,13 +982,13 @@ in6_update_ifa(struct ifnet *ifp, struct
}
if (hostIsNew)
- error = in6_setup_ifa(ifp, ifra, ia, flags);
+ error = in6_broadcast_ifa(ifp, ifra, ia, flags);
return (error);
}
/*
- * Fill in basic IPv6 address request info
+ * Fill in basic IPv6 address request info.
*/
void
in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr,
@@ -1078,6 +1029,14 @@ in6_validate_ifra(struct ifnet *ifp, str
ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
return (EAFNOSUPPORT);
+
+ /*
+ * Validate address
+ */
+ if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) ||
+ ifra->ifra_addr.sin6_family != AF_INET6)
+ return (EINVAL);
+
/*
* validate ifra_prefixmask. don't check sin6_family, netmask
* does not carry fields other than sin6_len.
@@ -1211,10 +1170,12 @@ in6_alloc_ifa(struct ifnet *ifp, struct
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);
+ /* XXX: Can we assign ,sin6_addr and skip the rest? */
+ ia->ia_addr = ifra->ifra_addr;
ia->ia6_createtime = time_uptime;
if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
/*
- * XXX: some functions expect that ifa_dstaddr is not
+ * Some functions expect that ifa_dstaddr is not
* NULL for p2p interfaces.
*/
ia->ia_ifa.ifa_dstaddr =
@@ -1222,7 +1183,15 @@ in6_alloc_ifa(struct ifnet *ifp, struct
} else {
ia->ia_ifa.ifa_dstaddr = NULL;
}
+
+ /* set prefix mask if any */
ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask;
+ if (ifra->ifra_prefixmask.sin6_len != 0) {
+ ia->ia_prefixmask.sin6_family = AF_INET6;
+ ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len;
+ ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr;
+ }
+
ia->ia_ifp = ifp;
ifa_ref(&ia->ia_ifa); /* if_addrhead */
IF_ADDR_WLOCK(ifp);
@@ -1232,30 +1201,28 @@ in6_alloc_ifa(struct ifnet *ifp, struct
ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */
IN6_IFADDR_WLOCK();
TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link);
- LIST_INSERT_HEAD(IN6ADDR_HASH(&ifra->ifra_addr.sin6_addr),
- ia, ia6_hash);
+ LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash);
IN6_IFADDR_WUNLOCK();
return (ia);
}
+/*
+ * Update/configure interface address parameters:
+ *
+ * 1) Update lifetime
+ * 2) Update interface metric ad flags
+ * 3) Notify other subsystems
+ */
static int
in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra,
struct in6_ifaddr *ia, int hostIsNew, int flags)
{
- struct sockaddr_in6 *pdst;
int error;
- char ip6buf[INET6_ADDRSTRLEN];
/* update timestamp */
ia->ia6_updatetime = time_uptime;
- /* set prefix mask */
- if (ifra->ifra_prefixmask.sin6_len != 0) {
- ia->ia_prefixmask = ifra->ifra_prefixmask;
- ia->ia_prefixmask.sin6_family = AF_INET6;
- }
-
/*
* Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred
* to see if the address is deprecated or invalidated, but initialize
@@ -1282,6 +1249,9 @@ in6_update_ifa_internal(struct ifnet *if
ia->ia6_lifetime.ia6t_preferred = time_uptime;
}
+ /* Update metric */
+ ia->ia_ifa.ifa_metric = ifp->if_metric;
+
/*
* configure address flags.
*/
@@ -1300,53 +1270,40 @@ in6_update_ifa_internal(struct ifnet *if
if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED)
ia->ia6_flags |= IN6_IFF_TENTATIVE;
- /*
- * If a new destination address is specified, scrub the old one and
- * install the new destination. Note that the interface must be
- * p2p or loopback (see the check above.)
- */
- pdst = &ifra->ifra_dstaddr;
- if (pdst->sin6_family == AF_INET6 &&
- !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
- if ((ia->ia_flags & IFA_ROUTE) != 0 &&
- (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
- nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
- "remove a route to the old destination: %s\n",
- ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
- /* proceed anyway... */
- } else
- ia->ia_flags &= ~IFA_ROUTE;
- ia->ia_dstaddr = *pdst;
- }
-
- /* reset the interface and routing table appropriately. */
- if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) {
- /*
- * XXX: if a change of an existing address failed, keep the entry
- * anyway.
- */
- }
+ /* notify other subsystems */
+ error = in6_notify_ifa(ifp, ia, ifra, hostIsNew);
return (error);
}
+/*
+ * Do link-level ifa job:
+ * 1) Add lle entry for added address
+ * 2) Notifies routing socket users about new address
+ * 3) join appropriate multicast group
+ * 4) start DAD if enabled
+ */
static int
-in6_setup_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
+in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra,
struct in6_ifaddr *ia, int flags)
{
struct in6_multi *in6m_sol;
int error = 0;
/* Add local address to lltable, if necessary (ex. on p2p link). */
- in6_ifaddloop(&(ia->ia_ifa));
+ if ((error = nd6_add_ifa_lle(ia)) != 0) {
+ in6_purgeaddr(&ia->ia_ifa);
+ ifa_free(&ia->ia_ifa);
+ return (error);
+ }
/* Join necessary multicast groups. */
in6m_sol = NULL;
if ((ifp->if_flags & IFF_MULTICAST) != 0) {
error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol);
if (error != 0) {
- ifa_free(&ia->ia_ifa);
in6_purgeaddr(&ia->ia_ifa);
+ ifa_free(&ia->ia_ifa);
return (error);
}
}
@@ -1571,7 +1528,7 @@ in6_purgeaddr(struct ifaddr *ifa)
nd6_dad_stop(ifa);
/* Remove local address entry from lltable. */
- in6_ifremloop(ifa);
+ nd6_rem_ifa_lle(ia);
/* Leave multicast groups. */
error = in6_purgeaddr_mc(ifp, ia, ifa0);
@@ -1650,29 +1607,33 @@ in6_purgeif(struct ifnet *ifp)
}
/*
- * Initialize an interface's IPv6 address and routing table entry.
+ * Notifies other other subsystems about address change/arrival:
+ * 1) Notifies device handler on first IPv6 address assignment
+ * 2) Handle routing table changes for P2P links and route
+ * 3) Handle routing table changes for address host route
*/
static int
-in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia,
- struct sockaddr_in6 *sin6, int newhost)
+in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia,
+ struct in6_aliasreq *ifra, int hostIsNew)
{
int error = 0, plen, ifacount = 0;
struct ifaddr *ifa;
+ struct sockaddr_in6 *pdst;
+ char ip6buf[INET6_ADDRSTRLEN];
/*
* Give the interface a chance to initialize
* if this is its first address,
- * and to validate the address if necessary.
*/
- IF_ADDR_RLOCK(ifp);
- TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
- if (ifa->ifa_addr->sa_family != AF_INET6)
- continue;
- ifacount++;
+ if (hostIsNew != 0) {
+ IF_ADDR_RLOCK(ifp);
+ TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
+ if (ifa->ifa_addr->sa_family != AF_INET6)
+ continue;
+ ifacount++;
+ }
+ IF_ADDR_RUNLOCK(ifp);
}
- IF_ADDR_RUNLOCK(ifp);
-
- ia->ia_addr = *sin6;
if (ifacount <= 1 && ifp->if_ioctl) {
error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia);
@@ -1680,12 +1641,26 @@ in6_ifinit(struct ifnet *ifp, struct in6
return (error);
}
- ia->ia_ifa.ifa_metric = ifp->if_metric;
-
- /* we could do in(6)_socktrim here, but just omit it at this moment. */
+ /*
+ * If a new destination address is specified, scrub the old one and
+ * install the new destination. Note that the interface must be
+ * p2p or loopback.
+ */
+ pdst = &ifra->ifra_dstaddr;
+ if (pdst->sin6_family == AF_INET6 &&
+ !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) {
+ if ((ia->ia_flags & IFA_ROUTE) != 0 &&
+ (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) {
+ nd6log((LOG_ERR, "in6_update_ifa_internal: failed to "
+ "remove a route to the old destination: %s\n",
+ ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr)));
+ /* proceed anyway... */
+ } else
+ ia->ia_flags &= ~IFA_ROUTE;
+ ia->ia_dstaddr = *pdst;
+ }
/*
- * Special case:
* If a new destination address is specified for a point-to-point
* interface, install a route to the destination as an interface
* direct route.
@@ -1696,19 +1671,19 @@ in6_ifinit(struct ifnet *ifp, struct in6
if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 &&
ia->ia_dstaddr.sin6_family == AF_INET6) {
int rtflags = RTF_UP | RTF_HOST;
- error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
- if (error)
- return (error);
- ia->ia_flags |= IFA_ROUTE;
/*
* Handle the case for ::1 .
*/
if (ifp->if_flags & IFF_LOOPBACK)
ia->ia_flags |= IFA_RTSELF;
+ error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags);
+ if (error)
+ return (error);
+ ia->ia_flags |= IFA_ROUTE;
}
/*
- * add a loopback route to self
+ * add a loopback route to self if not exists
*/
if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) {
error = ifa_add_loopback_route((struct ifaddr *)ia,
Modified: head/sys/netinet6/in6_var.h
==============================================================================
--- head/sys/netinet6/in6_var.h Sun Jan 19 13:51:46 2014 (r260881)
+++ head/sys/netinet6/in6_var.h Sun Jan 19 16:07:27 2014 (r260882)
@@ -822,12 +822,11 @@ int in6_prefix_ioctl(struct socket *, u_
int in6_prefix_add_ifid(int, struct in6_ifaddr *);
void in6_prefix_remove_ifid(int, struct in6_ifaddr *);
void in6_purgeprefix(struct ifnet *);
-void in6_ifremloop(struct ifaddr *);
-void in6_ifaddloop(struct ifaddr *);
int in6_is_addr_deprecated(struct sockaddr_in6 *);
int in6_src_ioctl(u_long, caddr_t);
+void in6_newaddrmsg(struct in6_ifaddr *, int);
/*
* Extended API for IPv6 FIB support.
*/
Modified: head/sys/netinet6/nd6.c
==============================================================================
--- head/sys/netinet6/nd6.c Sun Jan 19 13:51:46 2014 (r260881)
+++ head/sys/netinet6/nd6.c Sun Jan 19 16:07:27 2014 (r260882)
@@ -133,6 +133,7 @@ static int regen_tmpaddr(struct in6_ifad
static struct llentry *nd6_free(struct llentry *, int);
static void nd6_llinfo_timer(void *);
static void clear_llinfo_pqueue(struct llentry *);
+static void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
static VNET_DEFINE(struct callout, nd6_slowtimo_ch);
#define V_nd6_slowtimo_ch VNET(nd6_slowtimo_ch)
@@ -2177,6 +2178,62 @@ nd6_need_cache(struct ifnet *ifp)
}
/*
+ * Add pernament ND6 link-layer record for given
+ * interface address.
+ *
+ * Very similar to IPv4 arp_ifinit(), but:
+ * 1) IPv6 DAD is performed in different place
+ * 2) It is called by IPv6 protocol stack in contrast to
+ * arp_ifinit() which is typically called in SIOCSIFADDR
+ * driver ioctl handler.
+ *
+ */
+int
+nd6_add_ifa_lle(struct in6_ifaddr *ia)
+{
+ struct ifnet *ifp;
+ struct llentry *ln;
+
+ ifp = ia->ia_ifa.ifa_ifp;
+ IF_AFDATA_LOCK(ifp);
+ ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
+ ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR |
+ LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr);
+ IF_AFDATA_UNLOCK(ifp);
+ if (ln != NULL) {
+ ln->la_expire = 0; /* for IPv6 this means permanent */
+ ln->ln_state = ND6_LLINFO_REACHABLE;
+ LLE_WUNLOCK(ln);
+ in6_newaddrmsg(ia, RTM_ADD);
+ return (0);
+ }
+
+ return (ENOBUFS);
+}
+
+/*
+ * Removes ALL lle records for interface address prefix.
+ * XXXME: That's probably not we really want to do, we need
+ * to remove address record only and keep other records
+ * until we determine if given prefix is really going
+ * to be removed.
+ */
+void
+nd6_rem_ifa_lle(struct in6_ifaddr *ia)
+{
+ struct sockaddr_in6 mask, addr;
+ struct ifnet *ifp;
+
+ in6_newaddrmsg(ia, RTM_DELETE);
+
+ ifp = ia->ia_ifa.ifa_ifp;
+ memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr));
+ memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask));
+ lltable_prefix_free(AF_INET6, (struct sockaddr *)&addr,
+ (struct sockaddr *)&mask, LLE_STATIC);
+}
+
+/*
* the callers of this function need to be re-worked to drop
* the lle lock, drop here for now
*/
Modified: head/sys/netinet6/nd6.h
==============================================================================
--- head/sys/netinet6/nd6.h Sun Jan 19 13:51:46 2014 (r260881)
+++ head/sys/netinet6/nd6.h Sun Jan 19 16:07:27 2014 (r260882)
@@ -404,7 +404,6 @@ void nd6_purge(struct ifnet *);
void nd6_nud_hint(struct rtentry *, struct in6_addr *, int);
int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *,
struct sockaddr *, u_char *);
-void nd6_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
int nd6_ioctl(u_long, caddr_t, struct ifnet *);
struct llentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *,
char *, int, int, int);
@@ -416,6 +415,8 @@ int nd6_output_lle(struct ifnet *, struc
int nd6_output_flush(struct ifnet *, struct ifnet *, struct mbuf *,
struct sockaddr_in6 *, struct route *);
int nd6_need_cache(struct ifnet *);
+int nd6_add_ifa_lle(struct in6_ifaddr *);
+void nd6_rem_ifa_lle(struct in6_ifaddr *);
int nd6_storelladdr(struct ifnet *, struct mbuf *,
const struct sockaddr *, u_char *, struct llentry **);
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