dhclient-script: fix static classless routes

This fixes an issue with handling of classless static routes that breaks
Fedora 20 on GCE cloud VMs (#1102830).

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
Signed-off-by: Jiri Popelka <jpopelka@redhat.com>

dhclient-script

@@ -274,7 +274,10 @@ is_router_reachable() {
     mysubnet="$(get_network_address ${new_ip_address} ${new_subnet_mask})"
 
     if [ ! "${routersubnet}" = "${mysubnet}" ]; then
-        ip -4 route add ${router}/32 dev ${interface}
+        # TODO: This function should not have side effects such as adding or
+        # removing routes. Can this be done with "ip route get" or similar
+        # instead? Are there cases that rely on this route being created here?
+        ip -4 route replace ${router}/32 dev ${interface}
         if [ "$?" -ne 0 ]; then
             logmessage "failed to create host route for ${router}"
             return 1

dhcp.spec

@@ -18,7 +18,7 @@
 Summary:  Dynamic host configuration protocol software
 Name:     dhcp
 Version:  4.3.0
-Release:  14%{?dist}
+Release:  15%{?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.
@@ -624,6 +624,9 @@ done
 %doc doc/html/
 
 %changelog
+* Thu Jun 12 2014 Filipe Brandenburger <filbranden@google.com> - 12:4.3.0-15
+- dhclient-script: fix issue with classless static routes that breaks Fedora 20 on GCE cloud (#1102830)
+
 * Sat Jun 07 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 12:4.3.0-14
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild