PF_RAT_OP
snl_add_msg_attr_u8(nw, PF_RAT_OP, addr->port_op);
{ .type = PF_RAT_OP, .off = _OUT(port_op), .cb = snl_attr_get_uint8 },
{ .type = PF_RAT_OP, .off = _OUT(port_op), .cb = nlattr_get_uint8 },
nlattr_add_u8(nw, PF_RAT_OP, r->port_op);