SADB_X_EXT_SA2
if (ext_hdrs[SADB_X_EXT_SA2-1]) {
const struct sadb_x_sa2 *sa2 = ext_hdrs[SADB_X_EXT_SA2-1];
if ((sa2 = ext_hdrs[SADB_X_EXT_SA2-1]) != NULL) {
[SADB_X_EXT_SA2] = (u8) sizeof(struct sadb_x_sa2),
sa2->sadb_x_sa2_exttype = SADB_X_EXT_SA2;