101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/*-
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* Copyright (c) 2004 Ruslan Ermilov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/kernel.h>
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#include <sys/mbuf.h>
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#include <sys/systm.h>
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#include <netgraph/ng_message.h>
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#include <netgraph/ng_hub.h>
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#include <netgraph/netgraph.h>
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static ng_constructor_t ng_hub_constructor;
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static ng_rcvdata_t ng_hub_rcvdata;
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static ng_disconnect_t ng_hub_disconnect;
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static struct ng_type ng_hub_typestruct = {
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.version = NG_ABI_VERSION,
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.name = NG_HUB_NODE_TYPE,
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.constructor = ng_hub_constructor,
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.rcvdata = ng_hub_rcvdata,
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.disconnect = ng_hub_disconnect,
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};
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NETGRAPH_INIT(hub, &ng_hub_typestruct);
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static int
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ng_hub_constructor(node_p node)
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{
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return (0);
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}
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static int
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ng_hub_rcvdata(hook_p hook, item_p item)
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{
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const node_p node = NG_HOOK_NODE(hook);
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int error = 0;
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hook_p hook2;
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struct mbuf * const m = NGI_M(item), *m2;
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int nhooks;
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if ((nhooks = NG_NODE_NUMHOOKS(node)) == 1) {
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NG_FREE_ITEM(item);
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return (0);
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}
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LIST_FOREACH(hook2, &node->nd_hooks, hk_hooks) {
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if (hook2 == hook)
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continue;
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if (--nhooks == 1)
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NG_FWD_ITEM_HOOK(error, item, hook2);
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else {
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if ((m2 = m_dup(m, M_DONTWAIT)) == NULL) {
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NG_FREE_ITEM(item);
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return (ENOBUFS);
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}
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NG_SEND_DATA_ONLY(error, hook2, m2);
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if (error)
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continue; /* don't give up */
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}
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}
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return (error);
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}
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static int
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ng_hub_disconnect(hook_p hook)
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{
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if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0 &&
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NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))
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ng_rmnode_self(NG_HOOK_NODE(hook));
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return (0);
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}
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