-int ic_proto_used; /* Protocol used, if any */
-u32 ic_nameservers[CONF_NAMESERVERS_MAX]; /* DNS Server IP addresses */
-u8 ic_domain[64]; /* DNS (not NIS) domain name */
+static int ic_proto_used; /* Protocol used, if any */
+static u32 ic_nameservers[CONF_NAMESERVERS_MAX]; /* DNS Server IP addresses */
+static u8 ic_domain[64]; /* DNS (not NIS) domain name */