[IPV6]: ROUTE: Flag RTF_DEFAULT for Route Infomation for ::/0.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 0f30ee3d94ea..f587a0e6cf34 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1403,6 +1403,9 @@ static struct rt6_info *rt6_add_route_info(struct in6_addr *prefix, int prefixle
         ipv6_addr_copy(&rtmsg.rtmsg_gateway, gwaddr);
         rtmsg.rtmsg_metric = 1024;
         rtmsg.rtmsg_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | RTF_UP | RTF_PREF(pref);
+        /* We should treat it as a default route if prefix length is 0. */
+        if (!prefixlen)
+                rtmsg.rtmsg_flags |= RTF_DEFAULT;
         rtmsg.rtmsg_ifindex = ifindex;
 
         ip6_route_add(&rtmsg, NULL, NULL, NULL);