From f4af851bac12b0a72515912d6e1458d41aa2e009 Mon Sep 17 00:00:00 2001
From: Brian Haley <brian.haley@hp.com>
Date: Tue, 1 Dec 2009 15:58:44 -0800
Subject: [PATCH] ipv6: Add IFA_F_DADFAILED flag

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>
---
 ip/ipaddress.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 592d7c62..f0add800 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -506,6 +506,10 @@ int print_addrinfo(const struct sockaddr_nl *who, struct nlmsghdr *n,
 		fprintf(fp, "dynamic ");
 	} else
 		ifa->ifa_flags &= ~IFA_F_PERMANENT;
+	if (ifa->ifa_flags&IFA_F_DADFAILED) {
+		ifa->ifa_flags &= ~IFA_F_DADFAILED;
+		fprintf(fp, "dadfailed ");
+	}
 	if (ifa->ifa_flags)
 		fprintf(fp, "flags %02x ", ifa->ifa_flags);
 	if (rta_tb[IFA_LABEL])