dhclient-script: PREINIT6: make sure link-local address is available (#1129500)

dhclient-script

@@ -710,6 +710,14 @@ case "${reason}" in
         # so the following is not needed anymore
         #ip -6 addr flush dev ${interface} scope global permanent
 
+        # we need a link-local address to be ready (not tentative)
+        for i in $(seq 50); do
+            # tentative flag == DAD is still not complete
+            tentative=$(ip -6 addr show dev ${interface} scope link | grep tentative)
+            [[ -z "${tentative}" ]] && exit_with_hooks 0
+            sleep 0.1
+        done
+
         exit_with_hooks 0
         ;;
 

dhcp.spec

@@ -18,7 +18,7 @@
 Summary:  Dynamic host configuration protocol software
 Name:     dhcp
 Version:  4.3.1
-Release:  1%{?dist}
+Release:  2%{?dist}
 # NEVER CHANGE THE EPOCH on this package.  The previous maintainer (prior to
 # dcantrell maintaining the package) made incorrect use of the epoch and
 # that's why it is at 12 now.  It should have never been used, but it was.
@@ -592,6 +592,9 @@ done
 %doc doc/html/
 
 %changelog
+* Thu Aug 14 2014 Jiri Popelka <jpopelka@redhat.com> - 12:4.3.1-2
+- dhclient-script: PREINIT6: make sure link-local address is available (#1129500)
+
 * Tue Aug 12 2014 Jiri Popelka <jpopelka@redhat.com> - 12:4.3.1-1
 - 4.3.1