return sptps_verify_datagram(&n->sptps, (char *)inpkt->data - 4, inpkt->len);
if(!digest_active(&n->indigest) || inpkt->len < sizeof inpkt->seqno + digest_length(&n->indigest))
return sptps_verify_datagram(&n->sptps, (char *)inpkt->data - 4, inpkt->len);
if(!digest_active(&n->indigest) || inpkt->len < sizeof inpkt->seqno + digest_length(&n->indigest))