[Note: if this is accepted I'll send out a patch for iproute,
if you'd prefer to not use the last ifa_flag I'll send a
much larger patch that does this differently :) ]
Add IFA_F_DADFAILED flag to denote an IPv6 address that has
failed Duplicate Address Detection, that way tools like
/sbin/ip can be more informative.
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 2001:db8::1/64 scope global tentative dadfailed
valid_lft forever preferred_lft forever
Signed-off-by: Brian Haley <brian.haley@hp.com>
---
diff --git a/include/linux/if_addr.h b/include/linux/if_addr.h
index a60c821..fd97404 100644
--- a/include/linux/if_addr.h
+++ b/include/linux/if_addr.h
@@ -41,6 +41,7 @@ enum
#define IFA_F_NODAD 0x02
#define IFA_F_OPTIMISTIC 0x04
+#define IFA_F_DADFAILED 0x08
#define IFA_F_HOMEADDRESS 0x10
#define IFA_F_DEPRECATED 0x20
#define IFA_F_TENTATIVE 0x40
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 43b3c9f..6532966 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1376,7 +1376,7 @@ static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
if (ifp->flags&IFA_F_PERMANENT) {
spin_lock_bh(&ifp->lock);
addrconf_del_timer(ifp);
- ifp->flags |= IFA_F_TENTATIVE;
+ ifp->flags |= IFA_F_DADFAILED;
spin_unlock_bh(&ifp->lock);
in6_ifa_put(ifp);
#ifdef CONFIG_IPV6_PRIVACY
--
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