Function ng_send_fn2

freebsd/netgraph/ng_base.c:3733–3767

* Send ng_item_fn2 function call to the specified node. * * If an optional pitem parameter is supplied, its apply * callback will be copied to the new item. If also NG_REUSE_ITEM * flag is set, no new item will be allocated, but pitem will * be used. */

 * be used.
 */
int
ng_send_fn2(node_p node, hook_p hook, item_p pitem, ng_item_fn2 *fn, void *arg1,
	int arg2, int flags)
{
	item_p item;

	KASSERT((pitem != NULL || (flags & NG_REUSE_ITEM) == 0),
	    ("%s: NG_REUSE_ITEM but no pitem", __func__));

	/*
	 * Allocate a new item if no supplied or
	 * if we can't use supplied one.
	 */
	if (pitem == NULL || (flags & NG_REUSE_ITEM) == 0) {
		if ((item = ng_alloc_item(NGQF_FN2, flags)) == NULL)
			return (ENOMEM);
		if (pitem != NULL)
			item->apply = pitem->apply;
	} else {
		if ((item = ng_realloc_item(pitem, NGQF_FN2, flags)) == NULL)
			return (ENOMEM);
	}

	item->el_flags = (item->el_flags & ~NGQF_RW) | NGQF_WRITER;
	NG_NODE_REF(node); /* and one for the item */
	NGI_SET_NODE(item, node);
	if (hook) {
		NG_HOOK_REF(hook);
		NGI_SET_HOOK(item, hook);
	}
	NGI_FN2(item) = fn;
	NGI_ARG1(item) = arg1;
	NGI_ARG2(item) = arg2;
	return(ng_snd_item(item, flags));
}

/*
 * Official timeout routines for Netgraph nodes.