-extern subnet_t *lookup_subnet_mac(subnet_t *, mac_t);
-extern subnet_t *lookup_subnet_ipv4(subnet_t *, ipv4_t);
-extern subnet_t *lookup_subnet_ipv6(subnet_t *, ipv6_t);
-
+extern int subnet_compare(subnet_t *, subnet_t *);
+extern subnet_t *lookup_subnet_mac(mac_t *);
+extern subnet_t *lookup_subnet_ipv4(ipv4_t *);
+extern subnet_t *lookup_subnet_ipv6(ipv6_t *);
+extern void dump_subnet_list(void);