Function ng_l2tp_seq_reset

freebsd/netgraph/ng_l2tp.c:1267–1305

* Reset sequence number state. */

 * Reset sequence number state.
 */
static void
ng_l2tp_seq_reset(priv_p priv)
{
	struct l2tp_seq *const seq = &priv->seq;
	hook_p hook;
	int i;

	/* Sanity check */
	L2TP_SEQ_CHECK(seq);

	/* Stop timers */
	ng_uncallout(&seq->rack_timer, priv->node);
	ng_uncallout(&seq->xack_timer, priv->node);

	/* Free retransmit queue */
	for (i = 0; i < L2TP_MAX_XWIN; i++) {
		if (seq->xwin[i] == NULL)
			break;
		m_freem(seq->xwin[i]);
	}

	/* Reset session hooks' sequence number states */
	NG_NODE_FOREACH_HOOK(priv->node, ng_l2tp_reset_session, NULL, hook);

	/* Reset node's sequence number state */
	seq->ns = 0;
	seq->nr = 0;
	seq->rack = 0;
	seq->xack = 0;
	seq->wmax = L2TP_MAX_XWIN;
	seq->cwnd = 1;
	seq->ssth = seq->wmax;
	seq->acks = 0;
	seq->rexmits = 0;
	bzero(seq->xwin, sizeof(seq->xwin));

	/* Done */
	L2TP_SEQ_CHECK(seq);
}

/*
 * Handle receipt of an acknowledgement value (Nr) from peer.