fe267a5590
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
175 lines
4.3 KiB
C
175 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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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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#ifdef NG_SEPARATE_MALLOC
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static MALLOC_DEFINE(M_NETGRAPH_HUB, "netgraph_hub", "netgraph hub node");
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#else
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#define M_NETGRAPH_HUB M_NETGRAPH
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#endif
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/* Per-node private data */
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struct ng_hub_private {
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int persistent; /* can exist w/o hooks */
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};
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typedef struct ng_hub_private *priv_p;
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/* Netgraph node methods */
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static ng_constructor_t ng_hub_constructor;
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static ng_rcvmsg_t ng_hub_rcvmsg;
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static ng_shutdown_t ng_hub_shutdown;
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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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/* List of commands and how to convert arguments to/from ASCII */
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static const struct ng_cmdlist ng_hub_cmdlist[] = {
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{
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NGM_HUB_COOKIE,
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NGM_HUB_SET_PERSISTENT,
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"setpersistent",
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NULL,
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NULL
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},
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{ 0 }
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};
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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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.rcvmsg = ng_hub_rcvmsg,
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.shutdown = ng_hub_shutdown,
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.rcvdata = ng_hub_rcvdata,
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.disconnect = ng_hub_disconnect,
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.cmdlist = ng_hub_cmdlist,
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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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priv_p priv;
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/* Allocate and initialize private info */
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priv = malloc(sizeof(*priv), M_NETGRAPH_HUB, M_WAITOK | M_ZERO);
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NG_NODE_SET_PRIVATE(node, priv);
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return (0);
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}
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/*
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* Receive a control message
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*/
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static int
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ng_hub_rcvmsg(node_p node, item_p item, hook_p lasthook)
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{
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const priv_p priv = NG_NODE_PRIVATE(node);
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int error = 0;
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struct ng_mesg *msg;
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NGI_GET_MSG(item, msg);
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if (msg->header.typecookie == NGM_HUB_COOKIE &&
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msg->header.cmd == NGM_HUB_SET_PERSISTENT) {
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priv->persistent = 1;
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} else {
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error = EINVAL;
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}
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NG_FREE_MSG(msg);
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return (error);
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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_NOWAIT)) == 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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/*
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* Shutdown node
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*/
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static int
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ng_hub_shutdown(node_p node)
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{
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const priv_p priv = NG_NODE_PRIVATE(node);
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free(priv, M_NETGRAPH_HUB);
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NG_NODE_SET_PRIVATE(node, NULL);
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NG_NODE_UNREF(node);
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return (0);
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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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const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
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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)) && !priv->persistent)
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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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