SADB_X_AALG_AES256GMAC
{ SADB_X_AALG_AES256GMAC, "gmac-aes-256", NULL },
sadb_sa->sadb_sa_auth = SADB_X_AALG_AES256GMAC;
ii->ii_authalg = SADB_X_AALG_AES256GMAC;
case SADB_X_AALG_AES256GMAC: