From 2bda8a0c8af5294b869da1efd2c2b9a562f50dcf Mon Sep 17 00:00:00 2001 From: =?utf8?q?Bj=C3=B8rn=20Mork?= Date: Tue, 5 Jul 2011 23:04:13 +0000 Subject: [PATCH] Disable router anycast address for /127 prefixes MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 05838c7fcf64..fc6d37723664 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; -- 2.20.1