Function ng_pptpgre_reset

freebsd/netgraph/ng_pptpgre.c:1234–1271

* Reset state (must be called with lock held or from writer) */

 * Reset state (must be called with lock held or from writer)
 */
static void
ng_pptpgre_reset(hpriv_p hpriv)
{
	struct ng_pptpgre_roq *np;

	/* Reset adaptive timeout state */
	hpriv->ato = PPTP_MAX_TIMEOUT;
	hpriv->rtt = PPTP_TIME_SCALE / 10;
	if (hpriv->conf.peerPpd > 1)	/* ppd = 0 treat as = 1 */
		hpriv->rtt *= hpriv->conf.peerPpd;
	hpriv->dev = 0;
	hpriv->xmitWin = (hpriv->conf.recvWin + 1) / 2;
	if (hpriv->xmitWin < 2)		/* often the first packet is lost */
		hpriv->xmitWin = 2;		/*   because the peer isn't ready */
	else if (hpriv->xmitWin > PPTP_XMIT_WIN)
		hpriv->xmitWin = PPTP_XMIT_WIN;
	hpriv->winAck = hpriv->xmitWin;

	/* Reset sequence numbers */
	hpriv->recvSeq = ~0;
	hpriv->recvAck = ~0;
	hpriv->xmitSeq = ~0;
	hpriv->xmitAck = ~0;

	/* Stop timers */
	ng_uncallout(&hpriv->sackTimer, hpriv->node);
	ng_uncallout(&hpriv->rackTimer, hpriv->node);
	ng_uncallout(&hpriv->reorderTimer, hpriv->node);

	/* Clear reorder queue */
	while (!SLIST_EMPTY(&hpriv->roq)) {
		np = SLIST_FIRST(&hpriv->roq);
		SLIST_REMOVE_HEAD(&hpriv->roq, next);
		NG_FREE_ITEM(np->item);
		free(np, M_NETGRAPH);
	}
	hpriv->roq_len = 0;
}

/*
 * Return the current time scaled & translated to our internally used format.