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/*-
*
* Copyright (c) 1999-2000, Vitaly V Belekhov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/errno.h>
#include <sys/sockio.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_split.h>
/* Netgraph methods */
static ng_constructor_t ng_split_constructor;
static ng_shutdown_t ng_split_shutdown;
static ng_newhook_t ng_split_newhook;
static ng_rcvdata_t ng_split_rcvdata;
static ng_disconnect_t ng_split_disconnect;
/* Node type descriptor */
static struct ng_type typestruct = {
.version = NG_ABI_VERSION,
.name = NG_SPLIT_NODE_TYPE,
.constructor = ng_split_constructor,
.shutdown = ng_split_shutdown,
.newhook = ng_split_newhook,
.rcvdata = ng_split_rcvdata,
.disconnect = ng_split_disconnect,
};
NETGRAPH_INIT(ng_split, &typestruct);
/* Node private data */
struct ng_split_private {
hook_p out;
hook_p in;
hook_p mixed;
node_p node; /* Our netgraph node */
};
typedef struct ng_split_private *priv_p;
/************************************************************************
NETGRAPH NODE STUFF
************************************************************************/
/*
* Constructor for a node
*/
static int
ng_split_constructor(node_p node)
{
priv_p priv;
/* Allocate node */
MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_ZERO | M_NOWAIT);
if (priv == NULL)
return (ENOMEM);
bzero(priv, sizeof(*priv));
/* Link together node and private info */
NG_NODE_SET_PRIVATE(node, priv);
priv->node = node;
/* Done */
return (0);
}
/*
* Give our ok for a hook to be added
*/
static int
ng_split_newhook(node_p node, hook_p hook, const char *name)
{
priv_p priv = NG_NODE_PRIVATE(node);
hook_p *localhook;
if (strcmp(name, NG_SPLIT_HOOK_MIXED) == 0) {
localhook = &priv->mixed;
} else if (strcmp(name, NG_SPLIT_HOOK_IN) == 0) {
localhook = &priv->in;
} else if (strcmp(name, NG_SPLIT_HOOK_OUT) == 0) {
localhook = &priv->out;
} else {
return (EPFNOSUPPORT);
}
if (*localhook != NULL)
return (EISCONN);
*localhook = hook;
NG_HOOK_SET_PRIVATE(hook, localhook);
return (0);
}
/*
* Recive data from a hook.
*/
static int
ng_split_rcvdata(hook_p hook, item_p item)
{
const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
int error = 0;
if (hook == priv->out) {
printf("ng_split: got packet from out hook!\n");
NG_FREE_ITEM(item);
error = EINVAL;
} else if ((hook == priv->in) && (priv->mixed != NULL)) {
NG_FWD_ITEM_HOOK(error, item, priv->mixed);
} else if ((hook == priv->mixed) && (priv->out != NULL)) {
NG_FWD_ITEM_HOOK(error, item, priv->out);
}
return (error);
}
static int
ng_split_shutdown(node_p node)
{
const priv_p priv = NG_NODE_PRIVATE(node);
NG_NODE_SET_PRIVATE(node, NULL);
NG_NODE_UNREF(node);
FREE(priv, M_NETGRAPH);
return (0);
}
/*
* Hook disconnection
*/
static int
ng_split_disconnect(hook_p hook)
{
hook_p *localhook = NG_HOOK_PRIVATE(hook);
KASSERT(localhook != NULL, ("%s: null info", __func__));
*localhook = NULL;
if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
&& (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) {
ng_rmnode_self(NG_HOOK_NODE(hook));
}
return (0);
}
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