cipso_tag_type_1
tt1 = (struct cipso_tag_type_1 *)&cop[IPOPT_OLEN + 5];
struct cipso_tag_type_1 *tt1;
const struct cipso_tag_type_1 *tt1;
tt1 = (struct cipso_tag_type_1 *)&co->cipso_tag_type[0];