1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*-
*
* 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 */
priv = malloc(sizeof(*priv), M_NETGRAPH, M_ZERO | M_NOWAIT);
if (priv == NULL)
return (ENOMEM);
/* 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 (EINVAL);
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);
}
if (item)
NG_FREE_ITEM(item);
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);
}
|
