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diff --git a/sys/net/if.c b/sys/net/if.c
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -1017,6 +1017,16 @@
{
struct ifaddr *ifa;
+#ifdef INET6
+ /*
+ * Need to leave multicast addresses of proxy NDP llentries
+ * before in6_purgeifaddr() because the llentries are keys
+ * for in6_multi objects of proxy NDP entries.
+ * in6_purgeifaddr()s clean up llentries including proxy NDPs
+ * then we would lose the keys if they are called earlier.
+ */
+ in6_purge_proxy_ndp(ifp);
+#endif
while (1) {
struct epoch_tracker et;
diff --git a/sys/net/if_llatbl.h b/sys/net/if_llatbl.h
--- a/sys/net/if_llatbl.h
+++ b/sys/net/if_llatbl.h
@@ -164,11 +164,13 @@
typedef int (llt_foreach_cb_t)(struct lltable *, struct llentry *, void *);
typedef int (llt_foreach_entry_t)(struct lltable *, llt_foreach_cb_t *, void *);
+typedef bool (llt_match_cb_t)(struct lltable *, struct llentry *, void *);
struct lltable {
SLIST_ENTRY(lltable) llt_link;
sa_family_t llt_af;
- uint8_t llt_spare[3];
+ uint8_t llt_flags;
+ uint8_t llt_spare[2];
int llt_hsize;
int llt_entries;
int llt_maxentries;
@@ -194,6 +196,11 @@
MALLOC_DECLARE(M_LLTABLE);
+/*
+ * LLtable flags
+ */
+#define LLT_ADDEDPROXY 0x01 /* added a proxy llentry */
+
/*
* LLentry flags
*/
@@ -258,6 +265,9 @@
int lltable_foreach_lle(struct lltable *llt, llt_foreach_cb_t *f,
void *farg);
+void lltable_delete_conditional(struct lltable *llt, llt_match_cb_t *func,
+ void *farg);
+
/*
* Generic link layer address lookup function.
*/
diff --git a/sys/net/if_llatbl.c b/sys/net/if_llatbl.c
--- a/sys/net/if_llatbl.c
+++ b/sys/net/if_llatbl.c
@@ -730,6 +730,51 @@
LLTABLE_LIST_RUNLOCK();
}
+/*
+ * Delete llentries that func() returns true.
+ */
+struct lle_match_data {
+ struct llentries dchain;
+ llt_match_cb_t *func;
+ void *farg;
+};
+
+static int
+lltable_delete_conditional_cb(struct lltable *llt, struct llentry *lle,
+ void *farg)
+{
+ struct lle_match_data *lmd;
+
+ lmd = (struct lle_match_data *)farg;
+ if (lmd->func(llt, lle, lmd->farg)) {
+ LLE_WLOCK(lle);
+ CK_LIST_INSERT_HEAD(&lmd->dchain, lle, lle_chain);
+ }
+
+ return (0);
+}
+
+void
+lltable_delete_conditional(struct lltable *llt, llt_match_cb_t *func,
+ void *farg)
+{
+ struct llentry *lle, *next;
+ struct lle_match_data lmd;
+
+ bzero(&lmd, sizeof(lmd));
+ CK_LIST_INIT(&lmd.dchain);
+ lmd.func = func;
+ lmd.farg = farg;
+
+ IF_AFDATA_WLOCK(llt->llt_ifp);
+ lltable_foreach_lle(llt, lltable_delete_conditional_cb, &lmd);
+ llentries_unlink(llt, &lmd.dchain);
+ IF_AFDATA_WUNLOCK(llt->llt_ifp);
+
+ CK_LIST_FOREACH_SAFE(lle, &lmd.dchain, lle_chain, next)
+ llt->llt_delete_entry(llt, lle);
+}
+
struct lltable *
lltable_allocate_htbl(uint32_t hsize)
{
@@ -955,6 +1000,9 @@
lltable_unlink_entry(llt, lle_tmp);
}
lltable_link_entry(llt, lle);
+ if ((lle->la_flags & LLE_PUB) != 0 &&
+ (llt->llt_flags & LLT_ADDEDPROXY) == 0)
+ llt->llt_flags |= LLT_ADDEDPROXY;
IF_AFDATA_WUNLOCK(ifp);
if (lle_tmp != NULL) {
diff --git a/sys/netinet6/in6.c b/sys/netinet6/in6.c
--- a/sys/netinet6/in6.c
+++ b/sys/netinet6/in6.c
@@ -162,6 +162,9 @@
static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *,
struct in6_ifaddr *, int);
+static void in6_join_proxy_ndp_mc(struct ifnet *, const struct in6_addr *);
+static void in6_leave_proxy_ndp_mc(struct ifnet *, const struct in6_addr *);
+
#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa))
#define ia62ifa(ia6) (&((ia6)->ia_ifa))
@@ -741,6 +744,26 @@
return (imm);
}
+
+static int
+in6_solicited_node_maddr(struct in6_addr *maddr,
+ struct ifnet *ifp, const struct in6_addr *base)
+{
+ int error;
+
+ bzero(maddr, sizeof(struct in6_addr));
+ maddr->s6_addr32[0] = IPV6_ADDR_INT32_MLL;
+ maddr->s6_addr32[2] = htonl(1);
+ maddr->s6_addr32[3] = base->s6_addr32[3];
+ maddr->s6_addr8[12] = 0xff;
+ if ((error = in6_setscope(maddr, ifp, NULL)) != 0) {
+ /* XXX: should not happen */
+ log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
+ }
+
+ return error;
+}
+
/*
* Join necessary multicast groups. Factored out from in6_update_ifa().
* This entire work should only be done once, for the default FIB.
@@ -757,16 +780,9 @@
KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__));
/* Join solicited multicast addr for new host id. */
- bzero(&mltaddr, sizeof(struct in6_addr));
- mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL;
- mltaddr.s6_addr32[2] = htonl(1);
- mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3];
- mltaddr.s6_addr8[12] = 0xff;
- if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) {
- /* XXX: should not happen */
- log(LOG_ERR, "%s: in6_setscope failed\n", __func__);
+ if ((error = in6_solicited_node_maddr(&mltaddr, ifp,
+ &ifra->ifra_addr.sin6_addr)) != 0)
goto cleanup;
- }
delay = error = 0;
if ((flags & IN6_IFAUPDATE_DADDELAY)) {
/*
@@ -2285,6 +2301,10 @@
{
lle->la_flags |= LLE_DELETED;
+
+ /* Leave the solicited multicast group. */
+ if ((lle->la_flags & LLE_PUB) != 0)
+ in6_leave_proxy_ndp_mc(llt->llt_ifp, &lle->r_l3addr.addr6);
EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED);
#ifdef DIAGNOSTIC
log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle);
@@ -2463,7 +2483,9 @@
static void
in6_lltable_post_resolved(struct lltable *llt, struct llentry *lle)
{
- /* Handle proxy NDP entries (not yet). */
+ /* Join the solicited multicast group for dst. */
+ if ((lle->la_flags & LLE_PUB) == LLE_PUB)
+ in6_join_proxy_ndp_mc(llt->llt_ifp, &lle->r_l3addr.addr6);
}
static struct lltable *
@@ -2621,3 +2643,72 @@
free(*nam, M_SONAME);
*nam = (struct sockaddr *)sin6_p;
}
+
+/*
+ * Join/leave the solicited multicast groups for proxy NDP entries.
+ */
+static void
+in6_join_proxy_ndp_mc(struct ifnet *ifp, const struct in6_addr *dst)
+{
+ struct in6_multi *inm;
+ struct in6_addr mltaddr;
+ char ip6buf[INET6_ADDRSTRLEN];
+ int error;
+
+ if (in6_solicited_node_maddr(&mltaddr, ifp, dst) != 0)
+ return; /* error logged in in6_solicited_node_maddr. */
+
+ error = in6_joingroup(ifp, &mltaddr, NULL, &inm, 0);
+ if (error != 0) {
+ nd6log((LOG_WARNING,
+ "%s: in6_joingroup failed for %s on %s (errno=%d)\n",
+ __func__, ip6_sprintf(ip6buf, &mltaddr), if_name(ifp),
+ error));
+ }
+}
+
+static void
+in6_leave_proxy_ndp_mc(struct ifnet *ifp, const struct in6_addr *dst)
+{
+ struct epoch_tracker et;
+ struct in6_multi *inm;
+ struct in6_addr mltaddr;
+ char ip6buf[INET6_ADDRSTRLEN];
+
+ if (in6_solicited_node_maddr(&mltaddr, ifp, dst) != 0)
+ return; /* error logged in in6_solicited_node_maddr. */
+
+ NET_EPOCH_ENTER(et);
+ inm = in6m_lookup(ifp, &mltaddr);
+ NET_EPOCH_EXIT(et);
+ if (inm != NULL)
+ in6_leavegroup(inm, NULL);
+ else
+ nd6log((LOG_WARNING, "%s: in6m_lookup failed for %s on %s\n",
+ __func__, ip6_sprintf(ip6buf, &mltaddr), if_name(ifp)));
+}
+
+static bool
+in6_lle_match_pub(struct lltable *llt, struct llentry *lle, void *farg)
+{
+ return ((lle->la_flags & LLE_PUB) != 0);
+}
+
+void
+in6_purge_proxy_ndp(struct ifnet *ifp)
+{
+ struct lltable *llt;
+ bool need_purge;
+
+ llt = LLTABLE6(ifp);
+ IF_AFDATA_WLOCK(ifp);
+ need_purge = ((llt->llt_flags & LLT_ADDEDPROXY) != 0);
+ IF_AFDATA_WUNLOCK(ifp);
+
+ /*
+ * Ever added proxy ndp entries, leave solicited node multicast
+ * before deleting the llentry.
+ */
+ if (need_purge)
+ lltable_delete_conditional(llt, in6_lle_match_pub, NULL);
+}
diff --git a/sys/netinet6/in6_var.h b/sys/netinet6/in6_var.h
--- a/sys/netinet6/in6_var.h
+++ b/sys/netinet6/in6_var.h
@@ -916,6 +916,8 @@
int in6_src_ioctl(u_long, caddr_t);
void in6_newaddrmsg(struct in6_ifaddr *, int);
+
+void in6_purge_proxy_ndp(struct ifnet *);
/*
* Extended API for IPv6 FIB support.
*/
diff --git a/sys/netinet6/nd6_nbr.c b/sys/netinet6/nd6_nbr.c
--- a/sys/netinet6/nd6_nbr.c
+++ b/sys/netinet6/nd6_nbr.c
@@ -96,6 +96,9 @@
static void nd6_ns_output_fib(struct ifnet *, const struct in6_addr *,
const struct in6_addr *, const struct in6_addr *, uint8_t *, u_int);
+static struct ifaddr *nd6_proxy_fill_sdl(struct ifnet *,
+ const struct in6_addr *, struct sockaddr_dl *);
+
VNET_DEFINE_STATIC(int, dad_enhanced) = 1;
#define V_dad_enhanced VNET(dad_enhanced)
@@ -255,34 +258,8 @@
/* (2) check. */
proxy = 0;
if (ifa == NULL) {
- struct sockaddr_dl rt_gateway;
- struct rt_addrinfo info;
- struct sockaddr_in6 dst6;
-
- bzero(&dst6, sizeof(dst6));
- dst6.sin6_len = sizeof(struct sockaddr_in6);
- dst6.sin6_family = AF_INET6;
- dst6.sin6_addr = taddr6;
-
- bzero(&rt_gateway, sizeof(rt_gateway));
- rt_gateway.sdl_len = sizeof(rt_gateway);
- bzero(&info, sizeof(info));
- info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&rt_gateway;
-
- if (rib_lookup_info(ifp->if_fib, (struct sockaddr *)&dst6,
- 0, 0, &info) == 0) {
- if ((info.rti_flags & RTF_ANNOUNCE) != 0 &&
- rt_gateway.sdl_family == AF_LINK) {
- /*
- * proxy NDP for single entry
- */
- proxydl = *SDL(&rt_gateway);
- ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(
- ifp, IN6_IFF_NOTREADY|IN6_IFF_ANYCAST);
- if (ifa)
- proxy = 1;
- }
- }
+ if ((ifa = nd6_proxy_fill_sdl(ifp, &taddr6, &proxydl)) != NULL)
+ proxy = 1;
}
if (ifa == NULL) {
/*
@@ -386,6 +363,30 @@
m_freem(m);
}
+static struct ifaddr *
+nd6_proxy_fill_sdl(struct ifnet *ifp, const struct in6_addr *taddr6,
+ struct sockaddr_dl *sdl)
+{
+ struct ifaddr *ifa;
+ struct llentry *ln;
+
+ ifa = NULL;
+ ln = nd6_lookup(taddr6, LLE_SF(AF_INET6, 0), ifp);
+ if (ln == NULL)
+ return (ifa);
+ if ((ln->la_flags & (LLE_PUB | LLE_VALID)) == (LLE_PUB | LLE_VALID)) {
+ link_init_sdl(ifp, (struct sockaddr *)sdl, ifp->if_type);
+ sdl->sdl_alen = ifp->if_addrlen;
+ bcopy(ln->ll_addr, &sdl->sdl_data, ifp->if_addrlen);
+ LLE_RUNLOCK(ln);
+ ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp,
+ IN6_IFF_NOTREADY|IN6_IFF_ANYCAST);
+ } else
+ LLE_RUNLOCK(ln);
+
+ return (ifa);
+}
+
/*
* Output a Neighbor Solicitation Message. Caller specifies:
* - ICMP6 header source IP6 address
diff --git a/tests/sys/netinet6/Makefile b/tests/sys/netinet6/Makefile
--- a/tests/sys/netinet6/Makefile
+++ b/tests/sys/netinet6/Makefile
@@ -15,7 +15,8 @@
output6 \
lpm6 \
fibs6 \
- ndp
+ ndp \
+ proxy_ndp
TEST_METADATA.output6+= required_programs="python"
${PACKAGE}FILES+= exthdr.py
diff --git a/tests/sys/netinet6/proxy_ndp.sh b/tests/sys/netinet6/proxy_ndp.sh
new file mode 100755
--- /dev/null
+++ b/tests/sys/netinet6/proxy_ndp.sh
@@ -0,0 +1,222 @@
+#!/usr/bin/env atf-sh
+#-
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2022 KUROSAWA Takahiro <takahiro.kurosawa@gmail.com>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+. $(atf_get_srcdir)/../common/vnet.subr
+
+atf_test_case "pndp_add_gu_success" "cleanup"
+pndp_add_gu_success_head() {
+ atf_set descr 'Test proxy ndp record addition'
+ atf_set require.user root
+}
+
+pndp_add_gu_success_body() {
+
+ vnet_init
+
+ jname="v6t-pndp_add_success"
+
+ epair0=$(vnet_mkepair)
+
+ vnet_mkjail ${jname} ${epair0}a
+ jexec ${jname} ndp -i ${epair0}a -- -disabled
+ jexec ${jname} ifconfig ${epair0}a up
+
+ jexec ${jname} ifconfig ${epair0}a inet6 2001:db8::1/64
+ proxy_mac=`jexec ${jname} ifconfig ${epair0}a ether | awk '$1~/ether/{print$2}'`
+
+ # wait for DAD to complete
+ while [ `jexec ${jname} ifconfig | grep inet6 | grep -c tentative` != "0" ]; do
+ sleep 0.1
+ done
+
+ atf_check jexec ${jname} ndp -s 2001:db8::2 ${proxy_mac} proxy
+ while [ `jexec ${jname} ifmcstat | grep -c undefined` != "0" ]; do
+ sleep 0.1
+ done
+
+ # checking the output of ndp -an is covered by ndp.sh.
+ # we check the output of ifmcstat output here.
+ t=`jexec ${jname} ifmcstat -i ${epair0}a -f inet6 | grep -A1 'group ff02::1:ff00:2'`
+ atf_check -o match:'mcast-macaddr 33:33:ff:00:00:02' echo $t
+}
+
+pndp_add_gu_success_cleanup() {
+ vnet_cleanup
+}
+
+atf_test_case "pndp_del_gu_success" "cleanup"
+pndp_del_gu_success_head() {
+ atf_set descr 'Test proxy ndp record deletion'
+ atf_set require.user root
+}
+
+pndp_del_gu_success_body() {
+
+ vnet_init
+
+ jname="v6t-pndp_del_gu_success"
+
+ epair0=$(vnet_mkepair)
+
+ vnet_mkjail ${jname} ${epair0}a
+
+ jexec ${jname} ndp -i ${epair0}a -- -disabled
+ jexec ${jname} ifconfig ${epair0}a up
+
+ jexec ${jname} ifconfig ${epair0}a inet6 2001:db8::1/64
+ proxy_mac=`jexec ${jname} ifconfig ${epair0}a ether | awk '$1~/ether/{print$2}'`
+
+ # wait for DAD to complete
+ while [ `jexec ${jname} ifconfig | grep inet6 | grep -c tentative` != "0" ]; do
+ sleep 0.1
+ done
+
+ atf_check jexec ${jname} ndp -s 2001:db8::2 ${proxy_mac} proxy
+ while [ `jexec ${jname} ifmcstat | grep -c undefined` != "0" ]; do
+ sleep 0.1
+ done
+ jexec ${jname} ping -c1 -t1 2001:db8::2
+
+ atf_check -o match:"2001:db8::2 \(2001:db8::2\) deleted" jexec ${jname} ndp -nd 2001:db8::2
+ while [ `jexec ${jname} ifmcstat | grep -c undefined` != "0" ]; do
+ sleep 0.1
+ done
+ atf_check \
+ -o not-match:'group ff02::1:ff00:2' \
+ -o not-match:'mcast-macaddr 33:33:ff:00:00:02' \
+ jexec ${jname} ifmcstat -i ${epair0}a -f inet6
+}
+
+pndp_del_gu_success_cleanup() {
+ vnet_cleanup
+}
+
+atf_test_case "pndp_ifdestroy_success" "cleanup"
+pndp_ifdetroy_success_head() {
+ atf_set descr 'Test interface destruction with proxy ndp'
+ atf_set require.user root
+}
+
+pndp_ifdestroy_success_body() {
+
+ vnet_init
+
+ jname="v6t-pndp_ifdestroy_success"
+
+ epair0=$(vnet_mkepair)
+
+ vnet_mkjail ${jname} ${epair0}a
+
+ jexec ${jname} ndp -i ${epair0}a -- -disabled
+ jexec ${jname} ifconfig ${epair0}a up
+
+ jexec ${jname} ifconfig ${epair0}a inet6 2001:db8::1/64
+ proxy_mac=`jexec ${jname} ifconfig ${epair0}a ether | awk '$1~/ether/{print$2}'`
+
+ # wait for DAD to complete
+ while [ `jexec ${jname} ifconfig | grep inet6 | grep -c tentative` != "0" ]; do
+ sleep 0.1
+ done
+
+ atf_check jexec ${jname} ndp -s 2001:db8::2 ${proxy_mac} proxy
+ while [ `jexec ${jname} ifmcstat | grep -c undefined` != "0" ]; do
+ sleep 0.1
+ done
+
+ atf_check jexec ${jname} ifconfig ${epair0}a destroy
+}
+
+pndp_ifdestroy_success_cleanup() {
+ vnet_cleanup
+}
+
+atf_test_case "pndp_neighbor_advert" "cleanup"
+pndp_neighbor_advert_head() {
+ atf_set descr 'Test Neighbor Advertisement for proxy ndp'
+ atf_set require.user root
+}
+
+pndp_neighbor_advert_body() {
+
+ vnet_init
+
+ jname_a="v6t-pndp_neighbor_advert_a" # NA sender (w/proxy ndp entry)
+ jname_b="v6t-pndp_neighbor_advert_b" # NA receiver (checker)
+ proxy_addr="2001:db8::aaaa"
+
+ epair0=$(vnet_mkepair)
+
+ vnet_mkjail ${jname_a} ${epair0}a
+ jexec ${jname_a} ndp -i ${epair0}a -- -disabled
+ jexec ${jname_a} ifconfig ${epair0}a up
+ jexec ${jname_a} ifconfig ${epair0}a inet6 2001:db8::1/64
+ proxy_mac=`jexec ${jname_a} ifconfig ${epair0}a ether | awk '$1~/ether/{print$2}'`
+ # wait for DAD to complete
+ while [ `jexec ${jname_a} ifconfig | grep inet6 | grep -c tentative` != "0" ]; do
+ sleep 0.1
+ done
+ atf_check jexec ${jname_a} ndp -s ${proxy_addr} ${proxy_mac} proxy
+ while [ `jexec ${jname_a} ifmcstat | grep -c undefined` != "0" ]; do
+ sleep 0.1
+ done
+
+ vnet_mkjail ${jname_b} ${epair0}b
+ jexec ${jname_b} ndp -i ${epair0}b -- -disabled
+ jexec ${jname_b} ifconfig ${epair0}b up
+ jexec ${jname_b} ifconfig ${epair0}b inet6 2001:db8::2/64
+ # wait for DAD to complete
+ while [ `jexec ${jname_b} ifconfig | grep inet6 | grep -c tentative` != "0" ]; do
+ sleep 0.1
+ done
+
+ jexec ${jname_b} ndp -nc
+ # jname_b sends a NS before ICMPv6 Echo Request for the proxy address.
+ # jname_a responds with a NA resolving the proxy address.
+ # Then there must be a NDP entry of the proxy address in jname_b.
+ jexec ${jname_b} ping -c1 -t1 ${proxy_addr}
+ atf_check -o match:"${proxy_addr} +${proxy_mac} +${epair0}b" \
+ jexec ${jname_b} ndp -an
+}
+
+pndp_neighbor_advert_cleanup() {
+ vnet_cleanup
+}
+
+atf_init_test_cases()
+{
+
+ atf_add_test_case "pndp_add_gu_success"
+ atf_add_test_case "pndp_del_gu_success"
+ atf_add_test_case "pndp_ifdestroy_success"
+ atf_add_test_case "pndp_neighbor_advert"
+}
+
+# end
+

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