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Commit 88ad3149 authored by Hannes Frederic Sowa's avatar Hannes Frederic Sowa Committed by David S. Miller
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ipv6: don't install anycast address for /128 addresses on routers 



It does not make sense to create an anycast address for an /128-prefix.
Suppress it.

As 32019e65 ("ipv6: Do not leave router anycast address for /127
prefixes.") shows we also may not leave them, because we could accidentally
remove an anycast address the user has allocated or got added via another
prefix.

Cc: François-Xavier Le Bail <fx.lebail@yahoo.com>
Cc: Thomas Haller <thaller@redhat.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e5e97ee9

net/ipv6/addrconf.c

+2 −2
Original line number Diff line number Diff line
@@ -1671,7 +1671,7 @@ 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 */

	if (ifp->prefix_len >= 127) /* RFC 6164 */

		return;

	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);

	if (ipv6_addr_any(&addr))
@@ -1682,7 +1682,7 @@ static void addrconf_join_anycast(struct inet6_ifaddr *ifp) 
static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)

{

	struct in6_addr addr;

	if (ifp->prefix_len == 127) /* RFC 6164 */

	if (ifp->prefix_len >= 127) /* RFC 6164 */

		return;

	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);

	if (ipv6_addr_any(&addr))