process_ip_string
error = process_ip_string(ifcfg_file, (char *)new_val->ip_addr,
error = process_ip_string(ifcfg_file, (char *)new_val->sub_net,
error = process_ip_string(ifcfg_file, (char *)new_val->gate_way,
error = process_ip_string(ifcfg_file, (char *)new_val->dns_addr, DNS);