-void *ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4);
-void ip4_address_normalize (ip4_address_t * ip4, u8 preflen);
-void ip6_address_normalize (ip6_address_t * ip6, u8 preflen);
-void ip4_preflen_to_mask (u8 pref_len, ip4_address_t * ip);
-u32 ip4_mask_to_preflen (ip4_address_t * mask);
-void ip4_prefix_max_address_host_order (ip4_address_t * ip, u8 plen,
- ip4_address_t * res);
-void ip6_prefix_max_address_host_order (ip6_address_t * ip, u8 plen,
- ip6_address_t * res);
-void ip6_preflen_to_mask (u8 pref_len, ip6_address_t * mask);
-u32 ip6_mask_to_preflen (ip6_address_t * mask);
+
+void ip_feature_enable_disable (ip_address_family_t af,
+ ip_sub_address_family_t safi,
+ ip_feature_location_t loc,
+ const char *feature,
+ u32 sw_if_index, int enable_disable,
+ void *feature_config,
+ u32 n_feature_config_bytes);