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authorBjørn Mork <bjorn@mork.no>2011-07-05 23:04:13 +0000
committerDavid S. Miller <davem@davemloft.net>2011-07-07 04:15:10 -0700
commit2bda8a0c8af5294b869da1efd2c2b9a562f50dcf (patch)
tree730583db2a4266ab31507678377c458d087903c6 /net/ipv6/addrconf.c
parentfa366124ef3aab35e378ae141f379c133d839943 (diff)
Disable router anycast address for /127 prefixes
RFC 6164 requires that routers MUST disable Subnet-Router anycast for the prefix when /127 prefixes are used. No need for matching code in addrconf_leave_anycast() as it will silently ignore any attempt to leave an unknown anycast address. Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/addrconf.c')
-rw-r--r--net/ipv6/addrconf.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 05838c7fcf6..fc6d3772366 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1470,6 +1470,8 @@ void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
{
struct in6_addr addr;
+ if (ifp->prefix_len == 127) /* RFC 6164 */
+ return;
ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
if (ipv6_addr_any(&addr))
return;