MPA_REVISION_EXT_1
if (__mpa_rr_revision(cep->mpa.hdr.params.bits) == MPA_REVISION_EXT_1) {
__mpa_rr_revision(hdr->params.bits) != MPA_REVISION_EXT_1)
__mpa_rr_set_revision(&cep->mpa.hdr.params.bits, MPA_REVISION_EXT_1);