File dhclient-script-handle-static-route-updates.patch of Package dhcp.4389

diff --git a/dhclient-script b/tmp/dhclient-script
index cd9301f..7eeec2e 100644
--- a/dhclient-script
+++ b/dhclient-script
@@ -163,6 +163,28 @@ parse_ipv4_classless_routes()
   echo "${_routes[*]}"
   return 0
 }
+del_ipv4_route()
+{
+  local dest=$1 ; shift
+  local mask=$1 ; shift
+  local gate=("$@")
+  local hops args
+
+  hops=()
+  if [ ${#gate[@]} -gt 1 ] ; then
+    for((g=0; g<${#gate[@]}; g++)) ; do
+      hops+=(nexthop ${gate[$g]:+via ${gate[$g]}}
+             dev $interface weight $((g+1)))
+    done
+  elif [ ${#gate[@]} -gt 0 ] ; then
+    hops+=(${gate[$g]:+via ${gate[$g]}} dev $interface)
+  fi
+  [ ${#hops[@]} -eq 0 ] && hops=(dev $interface)
+  args=("$dest${mask:+/$mask}" $metric_arg ${hops[*]})
+
+  err=`LC_ALL=C /sbin/ip route del ${args[*]} 2>&1` && return 0
+}
+
 set_ipv4_route()
 {
   local dest=$1 ; shift
@@ -226,6 +248,28 @@ get_ipv4_default_gw()
     echo "$new_routers"
   fi
 }
+
+del_ipv4_routes()
+{
+  if [ "x$old_rfc3442_classless_static_routes" != x ] ; then
+    old_rfc3442_classless_static_routes_formatted=$(
+      parse_ipv4_classless_routes $old_rfc3442_classless_static_routes
+    )
+  else
+    unset old_rfc3442_classless_static_routes_formatted
+  fi
+  if [ "x$old_rfc3442_classless_static_routes_formatted" != x -a \
+       "x$old_rfc3442_classless_static_routes_formatted" !=      \
+       "x$new_rfc3442_classless_static_routes_formatted" ] ; then
+       for r in $old_rfc3442_classless_static_routes_formatted ; do
+         route=(${r//,/ })
+	 del_ipv4_route ${route[*]}
+       done
+  elif [ "x$old_routers" != x -a "x$old_routers" != "x$new_routers" ] ; then
+    del_ipv4_route default "" $new_routers
+  fi
+}
+
 set_ipv4_routes()
 {
   if [ "x$new_rfc3442_classless_static_routes_formatted" != x ] ; then
@@ -475,6 +519,8 @@ BOUND|RENEW|REBIND|REBOOT)
     fi
   fi
 
+  del_ipv4_routes
+
   if [ x$new_interface_mtu != x ] ; then
     /sbin/ip link set $interface mtu $new_interface_mtu
   fi
@@ -486,7 +532,6 @@ BOUND|RENEW|REBIND|REBOOT)
                       ${new_broadcast_arg} \
                       dev $interface
 
-    set_ipv4_routes
   fi
   if [ x$new_ip_address != x$alias_ip_address -a x$alias_ip_address != x \
     -a x$new_ip_address != x$old_ip_address ];
@@ -495,6 +540,7 @@ BOUND|RENEW|REBIND|REBOOT)
                       dev $interface
   fi
 
+  set_ipv4_routes
   netconfig_modify
 
   if [ x$old_ip_address != x -a x$old_ip_address != x$new_ip_address ]; then