From 8be31ab2e15a20de586bd31f7786b5c3f34b7e4b Mon Sep 17 00:00:00 2001
From: Timur Pocheptsov <timur.pocheptsov@qt.io>
Date: Fri, 11 Sep 2020 09:50:49 +0200
Subject: [PATCH] Skip IPv6 address if DAD failed
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Fixes: QTBUG-84256
Fixes: QTBUG-84253
Task-number: QTBUG-84254
Pick-to: 5.15
Change-Id: I6116c8a337cc85adbca1bbab2609d6627127fa46
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/network/kernel/qnetworkinterface_linux.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/network/kernel/qnetworkinterface_linux.cpp b/src/network/kernel/qnetworkinterface_linux.cpp
index a21ccf40c48..c9d22eb247d 100644
--- a/src/network/kernel/qnetworkinterface_linux.cpp
+++ b/src/network/kernel/qnetworkinterface_linux.cpp
@@ -419,6 +419,9 @@ static void getAddresses(int sock, char *buf, QList<QNetworkInterfacePrivate *>
             }
         }
 
+        if (ifa->ifa_family == AF_INET6 && (ifa->ifa_flags & IFA_F_DADFAILED))
+            return;
+
         // now handle flags
         QNetworkInterfacePrivate::calculateDnsEligibility(&entry,
                                                           flags & IFA_F_TEMPORARY,