SADB_X_SPDDELETE2
if ((len = pfkey_send_x5(so, SADB_X_SPDDELETE2, spid)) < 0)
{ SADB_X_SPDDELETE2, "X_SPDDELETE2", NULL },
if_ipsec_set_sadb_msg(msg, extlen, SADB_X_SPDDELETE2);
case SADB_X_SPDDELETE2: