[IPV6] ADDRCONF: Optimistic Duplicate Address Detection (RFC 4429) Support.

Nominally an autoconfigured IPv6 address is added to an interface in the
Tentative state (as per RFC 2462).  Addresses in this state remain in this
state while the Duplicate Address Detection process operates on them to
determine their uniqueness on the network.  During this period, these
tentative addresses may not be used for communication, increasing the time
before a node may be able to communicate on a network.  Using Optimistic
Duplicate Address Detection, autoconfigured addresses may be used
immediately for communication on the network, as long as certain rules are
followed to avoid conflicts with other nodes during the Duplicate Address
Detection process.

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

1 files changed, 3 insertions, 1 deletions

diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 88df8fc814e4..f3531d0bcd05 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -73,7 +73,9 @@ extern int			ipv6_get_saddr(struct dst_entry *dst,
 extern int                      ipv6_dev_get_saddr(struct net_device *dev, 
                                                struct in6_addr *daddr,
                                                struct in6_addr *saddr);
-extern int                      ipv6_get_lladdr(struct net_device *dev, struct in6_addr *);
+extern int                      ipv6_get_lladdr(struct net_device *dev,
+                                                struct in6_addr *addr,
+                                                unsigned char banned_flags);
 extern int                      ipv6_rcv_saddr_equal(const struct sock *sk, 
                                                       const struct sock *sk2);
 extern void                     addrconf_join_solict(struct net_device *dev,