Function ng_ksocket_shutdown

freebsd/netgraph/ng_ksocket.c:931–967

* Destroy node */

 * Destroy node
 */
static int
ng_ksocket_shutdown(node_p node)
{
	const priv_p priv = NG_NODE_PRIVATE(node);
	priv_p embryo;

	/* Close our socket (if any) */
	if (priv->so != NULL) {
		SOCKBUF_LOCK(&priv->so->so_rcv);
		soupcall_clear(priv->so, SO_RCV);
		SOCKBUF_UNLOCK(&priv->so->so_rcv);
		SOCKBUF_LOCK(&priv->so->so_snd);
		soupcall_clear(priv->so, SO_SND);
		SOCKBUF_UNLOCK(&priv->so->so_snd);
		soclose(priv->so);
		priv->so = NULL;
	}

	/* If we are an embryo, take ourselves out of the parent's list */
	if (priv->flags & KSF_EMBRYONIC) {
		LIST_REMOVE(priv, siblings);
		priv->flags &= ~KSF_EMBRYONIC;
	}

	/* Remove any embryonic children we have */
	while (!LIST_EMPTY(&priv->embryos)) {
		embryo = LIST_FIRST(&priv->embryos);
		ng_rmnode_self(embryo->node);
	}

	/* Take down netgraph node */
	bzero(priv, sizeof(*priv));
	free(priv, M_NETGRAPH_KSOCKET);
	NG_NODE_SET_PRIVATE(node, NULL);
	NG_NODE_UNREF(node);		/* let the node escape */
	return (0);
}

/*
 * Hook disconnection