SADB_FLUSH
if ((len = pfkey_send_x3(so, SADB_FLUSH, satype)) < 0)
setkeymsg0(&msg, SADB_FLUSH, $2, sizeof(msg));
sendkeyshort(f_policy ? SADB_X_SPDFLUSH: SADB_FLUSH,
case SADB_FLUSH:
[SADB_FLUSH] = key_flush,