[IPV6]: Flag RTF_ANYCAST for anycast routes.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

diff --git a/include/linux/ipv6_route.h b/include/linux/ipv6_route.h
index e2f935038013b745252dd4ac6670c18474ec1e99..d7c41d1d706a30d592d6183079627afb101d42f8 100644 (file)
--- a/include/linux/ipv6_route.h
+++ b/include/linux/ipv6_route.h
@@ -18,6 +18,7 @@
                                           fallback, no routers on link */
 #define RTF_ADDRCONF   0x00040000      /* addrconf route - RA          */
 #define RTF_PREFIX_RT  0x00080000      /* A prefix only route - RA     */
+#define RTF_ANYCAST    0x00100000      /* Anycast                      */
 
 #define RTF_NONEXTHOP  0x00200000      /* route with no nexthop        */
 #define RTF_EXPIRES    0x00400000

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 7c68bfbee36193caca29325ad160d5be62c73265..66140f13d1197130c29f5d9fa90c4f10a3bf3819 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -413,11 +413,14 @@ static struct rt6_info *rt6_cow(struct rt6_info *ort, struct in6_addr *daddr,
        rt = ip6_rt_copy(ort);
 
        if (rt) {
-               ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
-
-               if (!(rt->rt6i_flags&RTF_GATEWAY))
+               if (!(rt->rt6i_flags&RTF_GATEWAY)) {
+                       if (rt->rt6i_dst.plen != 128 &&
+                           ipv6_addr_equal(&rt->rt6i_dst.addr, daddr))
+                               rt->rt6i_flags |= RTF_ANYCAST;
                        ipv6_addr_copy(&rt->rt6i_gateway, daddr);
+               }
 
+               ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
                rt->rt6i_dst.plen = 128;
                rt->rt6i_flags |= RTF_CACHE;
                rt->u.dst.flags |= DST_HOST;
@@ -1413,7 +1416,9 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
        rt->u.dst.obsolete = -1;
 
        rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP;
-       if (!anycast)
+       if (anycast)
+               rt->rt6i_flags |= RTF_ANYCAST;
+       else
                rt->rt6i_flags |= RTF_LOCAL;
        rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
        if (rt->rt6i_nexthop == NULL) {