594 	struct greheader *const gre = (struct greheader *)buf;  in ng_pptpgre_xmit()  local
627 	be32enc(gre, PPTP_INIT_VALUE);  in ng_pptpgre_xmit()
628 	be16enc(&gre->length, (m != NULL) ? m->m_pkthdr.len : 0);  in ng_pptpgre_xmit()
629 	be16enc(&gre->cid, hpriv->conf.peerCid);  in ng_pptpgre_xmit()
633 		gre->hasSeq = 1;  in ng_pptpgre_xmit()
639 		be32enc(&gre->data[0], hpriv->xmitSeq);  in ng_pptpgre_xmit()
644 		gre->hasAck = 1;  in ng_pptpgre_xmit()
645 		be32enc(&gre->data[gre->hasSeq], hpriv->recvSeq);  in ng_pptpgre_xmit()
652 	grelen = sizeof(*gre) + sizeof(u_int32_t) * (gre->hasSeq + gre->hasAck);  in ng_pptpgre_xmit()
669 	bcopy(gre, mtod(m, u_char *), grelen);  in ng_pptpgre_xmit()
680 	    gre->hasSeq && hpriv->xmitSeq == hpriv->recvAck + 1)  in ng_pptpgre_xmit()
755 	const struct greheader *gre;  in ng_pptpgre_rcvdata_lower()  local
773 	if (m->m_pkthdr.len < sizeof(*ip) + sizeof(*gre)) {  in ng_pptpgre_rcvdata_lower()
779 	if (m->m_len < sizeof(*ip) + sizeof(*gre)) {  in ng_pptpgre_rcvdata_lower()
780 		if ((m = m_pullup(m, sizeof(*ip) + sizeof(*gre))) == NULL) {  in ng_pptpgre_rcvdata_lower()
789 	if (m->m_len < iphlen + sizeof(*gre)) {  in ng_pptpgre_rcvdata_lower()
790 		if ((m = m_pullup(m, iphlen + sizeof(*gre))) == NULL) {  in ng_pptpgre_rcvdata_lower()
798 	gre = (const struct greheader *)((const u_char *)ip + iphlen);  in ng_pptpgre_rcvdata_lower()
799 	grelen = sizeof(*gre) + sizeof(u_int32_t) * (gre->hasSeq + gre->hasAck);  in ng_pptpgre_rcvdata_lower()
812 		gre = (const struct greheader *)((const u_char *)ip + iphlen);  in ng_pptpgre_rcvdata_lower()
817 	    - (iphlen + grelen + gre->hasSeq * be16dec(&gre->length));  in ng_pptpgre_rcvdata_lower()
822 	if ((be32dec(gre) & PPTP_INIT_MASK) != PPTP_INIT_VALUE) {  in ng_pptpgre_rcvdata_lower()
827 	hpriv = ng_pptpgre_find_session(priv, be16dec(&gre->cid));  in ng_pptpgre_rcvdata_lower()
835 	if (gre->hasAck) {  in ng_pptpgre_rcvdata_lower()
836 		const u_int32_t	ack = be32dec(&gre->data[gre->hasSeq]);  in ng_pptpgre_rcvdata_lower()
885 	if (!gre->hasSeq) {		/* no data to deliver */  in ng_pptpgre_rcvdata_lower()
891 	seq = be32dec(&gre->data[0]);  in ng_pptpgre_rcvdata_lower()