openwrtv3/package/busybox/patches/244-udhcpc_cidrroute.patch

--- a/networking/udhcp/options.c
+++ b/networking/udhcp/options.c
@@ -48,6 +48,7 @@ const struct dhcp_option dhcp_options[] 
 #if ENABLE_FEATURE_UDHCP_RFC3397
 	{ OPTION_STR1035 | OPTION_LIST            , 0x77 }, /* search             */
 #endif
+	{ OPTION_U8 | OPTION_LIST |     OPTION_REQ, 0x79 }, /* cidr_static_routes */
 	/* MSIE's "Web Proxy Autodiscovery Protocol" support */
 	{ OPTION_STRING                           , 0xfc }, /* wpad               */
 
@@ -97,6 +98,7 @@ const char dhcp_option_strings[] ALIGN1 
 #if ENABLE_FEATURE_UDHCP_RFC3397
 	"search" "\0"
 #endif
+	"cidrroute" "\0"   /* cidr_static_routes */
 	/* MSIE's "Web Proxy Autodiscovery Protocol" support */
 	"wpad" "\0"
 	;