[IPV6]: Allow link-local tunnel endpoints

Allow link-local tunnel endpoints if the underlying link is defined.

Signed-off-by: Ville Nuorvala <vnuorval@tcs.hut.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 2 deletions

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 22debbf28b8a..3944ea24c38c 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -460,6 +460,7 @@ ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
         if (rel_msg &&  pskb_may_pull(skb, offset + sizeof (*ipv6h))) {
                 struct rt6_info *rt;
                 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
+
                 if (!skb2)
                         goto out;
 
@@ -824,7 +825,7 @@ static void ip6_tnl_set_cap(struct ip6_tnl *t)
         if (ltype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) &&
             rtype & (IPV6_ADDR_UNICAST|IPV6_ADDR_MULTICAST) &&
             !((ltype|rtype) & IPV6_ADDR_LOOPBACK) &&
-            !((ltype|rtype) & IPV6_ADDR_LINKLOCAL)) {
+            (!((ltype|rtype) & IPV6_ADDR_LINKLOCAL) || p->link)) {
                 if (ltype&IPV6_ADDR_UNICAST)
                         p->flags |= IP6_TNL_F_CAP_XMIT;
                 if (rtype&IPV6_ADDR_UNICAST)
@@ -862,8 +863,11 @@ static void ip6ip6_tnl_link_config(struct ip6_tnl *t)
         dev->iflink = p->link;
 
         if (p->flags & IP6_TNL_F_CAP_XMIT) {
+                int strict = (ipv6_addr_type(&p->raddr) &
+                              (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL));
+
                 struct rt6_info *rt = rt6_lookup(&p->raddr, &p->laddr,
-                                                 p->link, 0);
+                                                 p->link, strict);
 
                 if (rt == NULL)
                         return;