address_not_null
if (address_not_null(nic->ip_addr))
if (address_not_null(nic->gateway))
if (address_not_null(nic->primary_dns))
if (address_not_null(nic->secondary_dns))
if (address_not_null(nic->dhcp))
if (address_not_null(init->isns_server))
if (address_not_null(init->slp_server))
if (address_not_null(init->pri_radius_server))
if (address_not_null(init->sec_radius_server))