Index: 4.2.5-P1-r3/dhclient-exit-hooks
===================================================================
--- 4.2.5-P1-r3.orig/dhclient-exit-hooks
+++ 4.2.5-P1-r3/dhclient-exit-hooks
@@ -4,7 +4,7 @@
 #
 # This file is sourced by /sbin/dhclient-script.
 #
-# dhcp option 121 is defined in RFC3442. The following is the link. 
+# dhcp option 121 is defined in RFC3442. The following is the link.
 # http://www.ietf.org/rfc/rfc3442.txt
 #
 # The code for this option is 121, and its minimum length is 5 bytes.
@@ -52,7 +52,7 @@ function add_routes() {
 while [ $# -ne 0 ]; do
   mask=$1
   shift
- 
+
   # Parse the arguments into a CIDR net/mask string
   if [ $mask -eq 32 ]; then
     destination="-host $1.$2.$3.$4"
@@ -66,22 +66,31 @@ while [ $# -ne 0 ]; do
   elif [ $mask -gt 8 ]; then
     destination="-net $1.$2.0.0/$mask"
     shift; shift
+  elif [ $mask -gt 0 ]; then
+     destination="-net $1.0.0.0/$mask"
+     shift
   else
-    destination="-net $1.0.0.0/$mask"
-    shift
+    destination="default"
   fi
- 
+
   # Read the gateway
   gateway="$1.$2.$3.$4"
   shift; shift; shift; shift
 
-  # Add route into routing table
-  route add $destination gw $gateway
-
-  # Print it out if the route is added successfully
-  if [ $? = 0 ]; then
-    echo "Added route \"$destination gw $gateway\""
+  if [ $gateway != "0.0.0.0" ]; then
+    # Add route into routing table
+    route add $destination gw $gateway
+    if [ $? = 0 ]; then
+      echo "Added route \"$destination gw $gateway\""
+    fi
+  else
+    # Add onlink route into routing table
+    route add $destination $interface
+    if [ $? = 0 ]; then
+      echo "Added route \"$destination on $interface\""
+    fi
   fi
+
 done
 }