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-rw-r--r--net/ipv6/Kconfig29
-rw-r--r--net/ipv6/Makefile3
-rw-r--r--net/ipv6/addrconf.c18
-rw-r--r--net/ipv6/af_inet6.c2
-rw-r--r--net/ipv6/fib6_rules.c11
-rw-r--r--net/ipv6/ip6_fib.c9
-rw-r--r--net/ipv6/ndisc.c2
-rw-r--r--net/ipv6/route.c66
-rw-r--r--net/ipv6/sit.c4
-rw-r--r--net/ipv6/tcp_ipv6.c13
-rw-r--r--net/ipv6/xfrm6_policy.c14
11 files changed, 124 insertions, 47 deletions
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index a460e8132b4d..6e48f52e197c 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -153,6 +153,19 @@ config INET6_XFRM_MODE_ROUTEOPTIMIZATION
---help---
Support for MIPv6 route optimization mode.
+config IPV6_SIT
+ tristate "IPv6: IPv6-in-IPv4 tunnel (SIT driver)"
+ depends on IPV6
+ default y
+ ---help---
+ Tunneling means encapsulating data of one protocol type within
+ another protocol and sending it over a channel that understands the
+ encapsulating protocol. This driver implements encapsulation of IPv6
+ into IPv4 packets. This is useful if you want to connect two IPv6
+ networks over an IPv4-only path.
+
+ Saying M here will produce a module called sit.ko. If unsure, say Y.
+
config IPV6_TUNNEL
tristate "IPv6: IPv6-in-IPv6 tunnel"
select INET6_TUNNEL
@@ -162,9 +175,16 @@ config IPV6_TUNNEL
If unsure, say N.
+config IPV6_MULTIPLE_TABLES
+ bool "IPv6: Multiple Routing Tables"
+ depends on IPV6 && EXPERIMENTAL
+ select FIB_RULES
+ ---help---
+ Support multiple routing tables.
+
config IPV6_SUBTREES
bool "IPv6: source address based routing"
- depends on IPV6 && EXPERIMENTAL
+ depends on IPV6_MULTIPLE_TABLES
---help---
Enable routing by source address or prefix.
@@ -176,13 +196,6 @@ config IPV6_SUBTREES
If unsure, say N.
-config IPV6_MULTIPLE_TABLES
- bool "IPv6: Multiple Routing Tables"
- depends on IPV6 && EXPERIMENTAL
- select FIB_RULES
- ---help---
- Support multiple routing tables.
-
config IPV6_ROUTE_FWMARK
bool "IPv6: use netfilter MARK value as routing key"
depends on IPV6_MULTIPLE_TABLES && NETFILTER
diff --git a/net/ipv6/Makefile b/net/ipv6/Makefile
index 87274e47fe32..addcc011bc01 100644
--- a/net/ipv6/Makefile
+++ b/net/ipv6/Makefile
@@ -4,7 +4,7 @@
obj-$(CONFIG_IPV6) += ipv6.o
-ipv6-objs := af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o sit.o \
+ipv6-objs := af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o raw.o \
protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
exthdrs.o sysctl_net_ipv6.o datagram.o proc.o \
@@ -29,6 +29,7 @@ obj-$(CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION) += xfrm6_mode_ro.o
obj-$(CONFIG_INET6_XFRM_MODE_BEET) += xfrm6_mode_beet.o
obj-$(CONFIG_NETFILTER) += netfilter/
+obj-$(CONFIG_IPV6_SIT) += sit.o
obj-$(CONFIG_IPV6_TUNNEL) += ip6_tunnel.o
obj-y += exthdrs_core.o
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index e03c33b2465b..b312a5f7a759 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -396,8 +396,10 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
ndev->regen_timer.data = (unsigned long) ndev;
if ((dev->flags&IFF_LOOPBACK) ||
dev->type == ARPHRD_TUNNEL ||
- dev->type == ARPHRD_NONE ||
- dev->type == ARPHRD_SIT) {
+#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
+ dev->type == ARPHRD_SIT ||
+#endif
+ dev->type == ARPHRD_NONE) {
printk(KERN_INFO
"%s: Disabled Privacy Extensions\n",
dev->name);
@@ -1546,8 +1548,10 @@ addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
This thing is done here expecting that the whole
class of non-broadcast devices need not cloning.
*/
+#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
cfg.fc_flags |= RTF_NONEXTHOP;
+#endif
ip6_route_add(&cfg);
}
@@ -1569,6 +1573,7 @@ static void addrconf_add_mroute(struct net_device *dev)
ip6_route_add(&cfg);
}
+#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
static void sit_route_add(struct net_device *dev)
{
struct fib6_config cfg = {
@@ -1582,6 +1587,7 @@ static void sit_route_add(struct net_device *dev)
/* prefix length - 96 bits "::d.d.d.d" */
ip6_route_add(&cfg);
}
+#endif
static void addrconf_add_lroute(struct net_device *dev)
{
@@ -1852,6 +1858,7 @@ int addrconf_set_dstaddr(void __user *arg)
if (dev == NULL)
goto err_exit;
+#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
if (dev->type == ARPHRD_SIT) {
struct ifreq ifr;
mm_segment_t oldfs;
@@ -1881,6 +1888,7 @@ int addrconf_set_dstaddr(void __user *arg)
err = dev_open(dev);
}
}
+#endif
err_exit:
rtnl_unlock();
@@ -2010,6 +2018,7 @@ int addrconf_del_ifaddr(void __user *arg)
return err;
}
+#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
static void sit_add_v4_addrs(struct inet6_dev *idev)
{
struct inet6_ifaddr * ifp;
@@ -2078,6 +2087,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
}
}
}
+#endif
static void init_loopback(struct net_device *dev)
{
@@ -2141,6 +2151,7 @@ static void addrconf_dev_config(struct net_device *dev)
addrconf_add_linklocal(idev, &addr);
}
+#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
static void addrconf_sit_config(struct net_device *dev)
{
struct inet6_dev *idev;
@@ -2166,6 +2177,7 @@ static void addrconf_sit_config(struct net_device *dev)
} else
sit_route_add(dev);
}
+#endif
static inline int
ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
@@ -2260,9 +2272,11 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
}
switch(dev->type) {
+#if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
case ARPHRD_SIT:
addrconf_sit_config(dev);
break;
+#endif
case ARPHRD_TUNNEL6:
addrconf_ip6_tnl_config(dev);
break;
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index e94eccb99707..858cae29581c 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -850,7 +850,6 @@ static int __init inet6_init(void)
err = addrconf_init();
if (err)
goto addrconf_fail;
- sit_init();
/* Init v6 extension headers. */
ipv6_rthdr_init();
@@ -927,7 +926,6 @@ static void __exit inet6_exit(void)
mip6_fini();
#endif
/* Cleanup code parts. */
- sit_cleanup();
ip6_flowlabel_cleanup();
addrconf_cleanup();
ip6_route_cleanup();
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index d8c1057e8b00..1896ecb52899 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -117,12 +117,15 @@ static int fib6_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
{
struct fib6_rule *r = (struct fib6_rule *) rule;
- if (!ipv6_prefix_equal(&fl->fl6_dst, &r->dst.addr, r->dst.plen))
+ if (r->dst.plen &&
+ !ipv6_prefix_equal(&fl->fl6_dst, &r->dst.addr, r->dst.plen))
return 0;
- if ((flags & RT6_LOOKUP_F_HAS_SADDR) &&
- !ipv6_prefix_equal(&fl->fl6_src, &r->src.addr, r->src.plen))
- return 0;
+ if (r->src.plen) {
+ if (!(flags & RT6_LOOKUP_F_HAS_SADDR) ||
+ !ipv6_prefix_equal(&fl->fl6_src, &r->src.addr, r->src.plen))
+ return 0;
+ }
if (r->tclass && r->tclass != ((ntohl(fl->fl6_flowlabel) >> 20) & 0xff))
return 0;
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 8fcae7a6510b..f98ca30d7c1f 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -169,7 +169,6 @@ static __inline__ void rt6_release(struct rt6_info *rt)
static struct fib6_table fib6_main_tbl = {
.tb6_id = RT6_TABLE_MAIN,
- .tb6_lock = RW_LOCK_UNLOCKED,
.tb6_root = {
.leaf = &ip6_null_entry,
.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO,
@@ -187,6 +186,12 @@ static void fib6_link_table(struct fib6_table *tb)
{
unsigned int h;
+ /*
+ * Initialize table lock at a single place to give lockdep a key,
+ * tables aren't visible prior to being linked to the list.
+ */
+ rwlock_init(&tb->tb6_lock);
+
h = tb->tb6_id & (FIB_TABLE_HASHSZ - 1);
/*
@@ -199,7 +204,6 @@ static void fib6_link_table(struct fib6_table *tb)
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
static struct fib6_table fib6_local_tbl = {
.tb6_id = RT6_TABLE_LOCAL,
- .tb6_lock = RW_LOCK_UNLOCKED,
.tb6_root = {
.leaf = &ip6_null_entry,
.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO,
@@ -213,7 +217,6 @@ static struct fib6_table *fib6_alloc_table(u32 id)
table = kzalloc(sizeof(*table), GFP_ATOMIC);
if (table != NULL) {
table->tb6_id = id;
- table->tb6_lock = RW_LOCK_UNLOCKED;
table->tb6_root.leaf = &ip6_null_entry;
table->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO;
}
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 0304b5fe8d6a..41a8a5f06602 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -967,8 +967,6 @@ static void ndisc_recv_na(struct sk_buff *skb)
ipv6_devconf.forwarding && ipv6_devconf.proxy_ndp &&
pneigh_lookup(&nd_tbl, &msg->target, dev, 0)) {
/* XXX: idev->cnf.prixy_ndp */
- WARN_ON(skb->dst != NULL &&
- ((struct rt6_info *)skb->dst)->rt6i_idev);
goto out;
}
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index d6b4b4f48d18..c953466b7afd 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -141,6 +141,10 @@ struct rt6_info ip6_null_entry = {
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+static int ip6_pkt_prohibit(struct sk_buff *skb);
+static int ip6_pkt_prohibit_out(struct sk_buff *skb);
+static int ip6_pkt_blk_hole(struct sk_buff *skb);
+
struct rt6_info ip6_prohibit_entry = {
.u = {
.dst = {
@@ -150,8 +154,8 @@ struct rt6_info ip6_prohibit_entry = {
.obsolete = -1,
.error = -EACCES,
.metrics = { [RTAX_HOPLIMIT - 1] = 255, },
- .input = ip6_pkt_discard,
- .output = ip6_pkt_discard_out,
+ .input = ip6_pkt_prohibit,
+ .output = ip6_pkt_prohibit_out,
.ops = &ip6_dst_ops,
.path = (struct dst_entry*)&ip6_prohibit_entry,
}
@@ -170,8 +174,8 @@ struct rt6_info ip6_blk_hole_entry = {
.obsolete = -1,
.error = -EINVAL,
.metrics = { [RTAX_HOPLIMIT - 1] = 255, },
- .input = ip6_pkt_discard,
- .output = ip6_pkt_discard_out,
+ .input = ip6_pkt_blk_hole,
+ .output = ip6_pkt_blk_hole,
.ops = &ip6_dst_ops,
.path = (struct dst_entry*)&ip6_blk_hole_entry,
}
@@ -484,7 +488,7 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
do { \
if (rt == &ip6_null_entry) { \
struct fib6_node *pn; \
- while (fn) { \
+ while (1) { \
if (fn->fn_flags & RTN_TL_ROOT) \
goto out; \
pn = fn->parent; \
@@ -529,13 +533,17 @@ struct rt6_info *rt6_lookup(struct in6_addr *daddr, struct in6_addr *saddr,
.nl_u = {
.ip6_u = {
.daddr = *daddr,
- /* TODO: saddr */
},
},
};
struct dst_entry *dst;
int flags = strict ? RT6_LOOKUP_F_IFACE : 0;
+ if (saddr) {
+ memcpy(&fl.fl6_src, saddr, sizeof(*saddr));
+ flags |= RT6_LOOKUP_F_HAS_SADDR;
+ }
+
dst = fib6_rule_lookup(&fl, flags, ip6_pol_route_lookup);
if (dst->error == 0)
return (struct rt6_info *) dst;
@@ -614,8 +622,6 @@ static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *d
ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
rt->rt6i_dst.plen = 128;
rt->rt6i_flags |= RTF_CACHE;
- if (rt->rt6i_flags & RTF_REJECT)
- rt->u.dst.error = ort->u.dst.error;
rt->u.dst.flags |= DST_HOST;
rt->rt6i_nexthop = neigh_clone(ort->rt6i_nexthop);
}
@@ -697,6 +703,7 @@ out2:
void ip6_route_input(struct sk_buff *skb)
{
struct ipv6hdr *iph = skb->nh.ipv6h;
+ int flags = RT6_LOOKUP_F_HAS_SADDR;
struct flowi fl = {
.iif = skb->dev->ifindex,
.nl_u = {
@@ -711,7 +718,9 @@ void ip6_route_input(struct sk_buff *skb)
},
.proto = iph->nexthdr,
};
- int flags = rt6_need_strict(&iph->daddr) ? RT6_LOOKUP_F_IFACE : 0;
+
+ if (rt6_need_strict(&iph->daddr))
+ flags |= RT6_LOOKUP_F_IFACE;
skb->dst = fib6_rule_lookup(&fl, flags, ip6_pol_route_input);
}
@@ -794,6 +803,9 @@ struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl)
if (rt6_need_strict(&fl->fl6_dst))
flags |= RT6_LOOKUP_F_IFACE;
+ if (!ipv6_addr_any(&fl->fl6_src))
+ flags |= RT6_LOOKUP_F_HAS_SADDR;
+
return fib6_rule_lookup(fl, flags, ip6_pol_route_output);
}
@@ -1345,6 +1357,7 @@ static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
struct in6_addr *gateway,
struct net_device *dev)
{
+ int flags = RT6_LOOKUP_F_HAS_SADDR;
struct ip6rd_flowi rdfl = {
.fl = {
.oif = dev->ifindex,
@@ -1357,7 +1370,9 @@ static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
},
.gateway = *gateway,
};
- int flags = rt6_need_strict(dest) ? RT6_LOOKUP_F_IFACE : 0;
+
+ if (rt6_need_strict(dest))
+ flags |= RT6_LOOKUP_F_IFACE;
return (struct rt6_info *)fib6_rule_lookup((struct flowi *)&rdfl, flags, __ip6_route_redirect);
}
@@ -1527,6 +1542,7 @@ static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
rt->u.dst.output = ort->u.dst.output;
memcpy(rt->u.dst.metrics, ort->u.dst.metrics, RTAX_MAX*sizeof(u32));
+ rt->u.dst.error = ort->u.dst.error;
rt->u.dst.dev = ort->u.dst.dev;
if (rt->u.dst.dev)
dev_hold(rt->u.dst.dev);
@@ -1730,24 +1746,50 @@ int ipv6_route_ioctl(unsigned int cmd, void __user *arg)
* Drop the packet on the floor
*/
-static int ip6_pkt_discard(struct sk_buff *skb)
+static inline int ip6_pkt_drop(struct sk_buff *skb, int code)
{
int type = ipv6_addr_type(&skb->nh.ipv6h->daddr);
if (type == IPV6_ADDR_ANY || type == IPV6_ADDR_RESERVED)
IP6_INC_STATS(IPSTATS_MIB_INADDRERRORS);
IP6_INC_STATS(IPSTATS_MIB_OUTNOROUTES);
- icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_NOROUTE, 0, skb->dev);
+ icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0, skb->dev);
kfree_skb(skb);
return 0;
}
+static int ip6_pkt_discard(struct sk_buff *skb)
+{
+ return ip6_pkt_drop(skb, ICMPV6_NOROUTE);
+}
+
static int ip6_pkt_discard_out(struct sk_buff *skb)
{
skb->dev = skb->dst->dev;
return ip6_pkt_discard(skb);
}
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+
+static int ip6_pkt_prohibit(struct sk_buff *skb)
+{
+ return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED);
+}
+
+static int ip6_pkt_prohibit_out(struct sk_buff *skb)
+{
+ skb->dev = skb->dst->dev;
+ return ip6_pkt_prohibit(skb);
+}
+
+static int ip6_pkt_blk_hole(struct sk_buff *skb)
+{
+ kfree_skb(skb);
+ return 0;
+}
+
+#endif
+
/*
* Allocate a dst for local (unicast / anycast) address.
*/
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 836eecd7e62b..b481a4d780c2 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -850,3 +850,7 @@ int __init sit_init(void)
inet_del_protocol(&sit_protocol, IPPROTO_IPV6);
goto out;
}
+
+module_init(sit_init);
+module_exit(sit_cleanup);
+MODULE_LICENSE("GPL");
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 3b6575478fcc..4c2a7c0cafef 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -329,7 +329,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
}
if (sk->sk_state == TCP_TIME_WAIT) {
- inet_twsk_put((struct inet_timewait_sock *)sk);
+ inet_twsk_put(inet_twsk(sk));
return;
}
@@ -653,7 +653,7 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32
int tot_len = sizeof(struct tcphdr);
if (ts)
- tot_len += 3*4;
+ tot_len += TCPOLEN_TSTAMP_ALIGNED;
buff = alloc_skb(MAX_HEADER + sizeof(struct ipv6hdr) + tot_len,
GFP_ATOMIC);
@@ -749,7 +749,7 @@ static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
bh_lock_sock(nsk);
return nsk;
}
- inet_twsk_put((struct inet_timewait_sock *)nsk);
+ inet_twsk_put(inet_twsk(nsk));
return NULL;
}
@@ -1283,18 +1283,17 @@ discard_and_relse:
do_time_wait:
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
- inet_twsk_put((struct inet_timewait_sock *)sk);
+ inet_twsk_put(inet_twsk(sk));
goto discard_it;
}
if (skb->len < (th->doff<<2) || tcp_checksum_complete(skb)) {
TCP_INC_STATS_BH(TCP_MIB_INERRS);
- inet_twsk_put((struct inet_timewait_sock *)sk);
+ inet_twsk_put(inet_twsk(sk));
goto discard_it;
}
- switch (tcp_timewait_state_process((struct inet_timewait_sock *)sk,
- skb, th)) {
+ switch (tcp_timewait_state_process(inet_twsk(sk), skb, th)) {
case TCP_TW_SYN:
{
struct sock *sk2;
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 6a252e2134d1..d400f8fae129 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -25,12 +25,14 @@
static struct dst_ops xfrm6_dst_ops;
static struct xfrm_policy_afinfo xfrm6_policy_afinfo;
-static int xfrm6_dst_lookup(struct xfrm_dst **dst, struct flowi *fl)
+static int xfrm6_dst_lookup(struct xfrm_dst **xdst, struct flowi *fl)
{
- int err = 0;
- *dst = (struct xfrm_dst*)ip6_route_output(NULL, fl);
- if (!*dst)
- err = -ENETUNREACH;
+ struct dst_entry *dst = ip6_route_output(NULL, fl);
+ int err = dst->error;
+ if (!err)
+ *xdst = (struct xfrm_dst *) dst;
+ else
+ dst_release(dst);
return err;
}
@@ -73,7 +75,7 @@ __xfrm6_find_bundle(struct flowi *fl, struct xfrm_policy *policy)
xdst->u.rt6.rt6i_src.plen);
if (ipv6_addr_equal(&xdst->u.rt6.rt6i_dst.addr, &fl_dst_prefix) &&
ipv6_addr_equal(&xdst->u.rt6.rt6i_src.addr, &fl_src_prefix) &&
- xfrm_bundle_ok(xdst, fl, AF_INET6,
+ xfrm_bundle_ok(policy, xdst, fl, AF_INET6,
(xdst->u.rt6.rt6i_dst.plen != 128 ||
xdst->u.rt6.rt6i_src.plen != 128))) {
dst_clone(dst);