3 * Copyright (c) 1999-2000, Vitaly V Belekhov
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice unmodified, this list of conditions, and the following
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * $FreeBSD: src/sys/netgraph/ng_split.c,v 1.7 2005/08/29 13:47:08 glebius Exp $
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/errno.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
37 #include <sys/sockio.h>
38 #include <sys/socket.h>
39 #include <sys/syslog.h>
41 #include "ng_message.h"
45 /* Netgraph methods */
46 static ng_constructor_t ng_split_constructor;
47 static ng_shutdown_t ng_split_shutdown;
48 static ng_newhook_t ng_split_newhook;
49 static ng_rcvdata_t ng_split_rcvdata;
50 static ng_disconnect_t ng_split_disconnect;
52 /* Node type descriptor */
53 static struct ng_type typestruct = {
54 .version = NG_ABI_VERSION,
55 .name = NG_SPLIT_NODE_TYPE,
56 .constructor = ng_split_constructor,
57 .shutdown = ng_split_shutdown,
58 .newhook = ng_split_newhook,
59 .rcvdata = ng_split_rcvdata,
60 .disconnect = ng_split_disconnect,
62 NETGRAPH_INIT(ng_split, &typestruct);
64 /* Node private data */
65 struct ng_split_private {
69 node_p node; /* Our netgraph node */
71 typedef struct ng_split_private *priv_p;
73 /************************************************************************
75 ************************************************************************/
78 * Constructor for a node
81 ng_split_constructor(node_p node)
86 priv = kmalloc(sizeof(*priv), M_NETGRAPH,
87 M_ZERO | M_WAITOK | M_NULLOK);
91 /* Link together node and private info */
92 NG_NODE_SET_PRIVATE(node, priv);
100 * Give our ok for a hook to be added
103 ng_split_newhook(node_p node, hook_p hook, const char *name)
105 priv_p priv = NG_NODE_PRIVATE(node);
108 if (strcmp(name, NG_SPLIT_HOOK_MIXED) == 0) {
109 localhook = &priv->mixed;
110 } else if (strcmp(name, NG_SPLIT_HOOK_IN) == 0) {
111 localhook = &priv->in;
112 } else if (strcmp(name, NG_SPLIT_HOOK_OUT) == 0) {
113 localhook = &priv->out;
117 if (*localhook != NULL)
120 NG_HOOK_SET_PRIVATE(hook, localhook);
126 * Recive data from a hook.
129 ng_split_rcvdata(hook_p hook, item_p item)
131 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
134 if (hook == priv->out) {
135 kprintf("ng_split: got packet from out hook!\n");
138 } else if ((hook == priv->in) && (priv->mixed != NULL)) {
139 NG_FWD_ITEM_HOOK(error, item, priv->mixed);
140 } else if ((hook == priv->mixed) && (priv->out != NULL)) {
141 NG_FWD_ITEM_HOOK(error, item, priv->out);
151 ng_split_shutdown(node_p node)
153 const priv_p priv = NG_NODE_PRIVATE(node);
155 NG_NODE_SET_PRIVATE(node, NULL);
157 kfree(priv, M_NETGRAPH);
166 ng_split_disconnect(hook_p hook)
168 hook_p *localhook = NG_HOOK_PRIVATE(hook);
170 KASSERT(localhook != NULL, ("%s: null info", __func__));
172 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
173 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) {
174 ng_rmnode_self(NG_HOOK_NODE(hook));