sadb_supported_t
sadb_supported_t *sasupp;
sasupp = (sadb_supported_t *)(samsg + 1);
sadb_supported_t *sasupp_auth = NULL;
sadb_supported_t *sasupp_encr = NULL;
sasupp_auth = (sadb_supported_t *)nextext;
sasupp_encr = (sadb_supported_t *)nextext;