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
|
/* packet-arcnet.c
* Routines for arcnet dissection
* Copyright 2001-2002, Peter Fales <ethereal@fales-lorenz.net>
*
* $Id: packet-arcnet.c,v 1.3 2002/10/18 21:40:12 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
#include "arcnet_pids.h"
/* Initialize the protocol and registered fields */
static int proto_arcnet = -1;
static int hf_arcnet_src = -1;
static int hf_arcnet_dst = -1;
static int hf_arcnet_protID = -1;
/* Initialize the subtree pointers */
static gint ett_arcnet = -1;
static dissector_table_t arcnet_dissector_table;
static dissector_handle_t data_handle;
/* Code to actually dissect the packets */
static void
dissect_arcnet (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
{
guint8 dst, src, protID;
tvbuff_t *next_tvb;
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *ti;
proto_tree *arcnet_tree;
/* Make entries in Protocol column and Info column on summary display */
if (check_col (pinfo->cinfo, COL_PROTOCOL))
col_set_str (pinfo->cinfo, COL_PROTOCOL, "ARCNET");
if (check_col (pinfo->cinfo, COL_INFO))
col_set_str (pinfo->cinfo, COL_INFO, "ARCNET");
src = tvb_get_guint8 (tvb, 0);
dst = tvb_get_guint8 (tvb, 1);
SET_ADDRESS(&pinfo->dl_src, AT_ARCNET, 1, tvb_get_ptr(tvb, 0, 1));
SET_ADDRESS(&pinfo->src, AT_ARCNET, 1, tvb_get_ptr(tvb, 0, 1));
SET_ADDRESS(&pinfo->dl_dst, AT_ARCNET, 1, tvb_get_ptr(tvb, 1, 1));
SET_ADDRESS(&pinfo->dst, AT_ARCNET, 1, tvb_get_ptr(tvb, 1, 1));
protID = tvb_get_guint8 (tvb, 4);
/* In the interest of speed, if "tree" is NULL, don't do any work not
necessary to generate protocol tree items. */
if (tree)
{
/* create display subtree for the protocol */
ti =
proto_tree_add_item (tree, proto_arcnet, tvb, 0, tvb_length (tvb),
FALSE);
arcnet_tree = proto_item_add_subtree (ti, ett_arcnet);
proto_tree_add_uint (tree, hf_arcnet_src, tvb, 0, 1, src);
proto_tree_add_uint (tree, hf_arcnet_dst, tvb, 1, 1, dst);
proto_tree_add_uint (tree, hf_arcnet_protID, tvb, 4, 1, protID);
}
/* If this protocol has a sub-dissector call it here, see section 1.8 */
next_tvb = tvb_new_subset (tvb, 8, -1, -1);
if (!dissector_try_port (arcnet_dissector_table, protID,
next_tvb, pinfo, tree))
{
if (check_col (pinfo->cinfo, COL_PROTOCOL))
{
col_add_fstr (pinfo->cinfo, COL_PROTOCOL, "0x%04x", protID);
}
call_dissector (data_handle, next_tvb, pinfo, tree);
}
}
/* Register the protocol with Ethereal */
/* this format is require because a script is used to build the C function
that calls all the protocol registration.
*/
static const value_string arcnet_prot_id_vals[] = {
{ARCNET_PROTO_IP, "IP packet"},
{ARCNET_PROTO_ARP, "ARP packet"},
{ARCNET_PROTO_IPX, "IPX packet"},
{0, NULL}
};
void
proto_register_arcnet (void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{&hf_arcnet_src,
{"Source", "arcnet.src",
FT_UINT8, BASE_HEX, NULL, 0,
"Source ID", HFILL}
},
{&hf_arcnet_dst,
{"Dest", "arcnet.dst",
FT_UINT8, BASE_HEX, NULL, 0,
"Dest ID", HFILL}
},
{&hf_arcnet_protID,
{"Protocol ID", "arcnet.protID",
FT_UINT8, BASE_HEX, VALS(arcnet_prot_id_vals), 0,
"Proto type", HFILL}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_arcnet,
};
arcnet_dissector_table = register_dissector_table ("arcnet.protocol_id",
"ARCNET Protocol ID",
FT_UINT8, BASE_HEX);
/* Register the protocol name and description */
proto_arcnet = proto_register_protocol ("ARCNET", "ARCNET", "arcnet");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array (proto_arcnet, hf, array_length (hf));
proto_register_subtree_array (ett, array_length (ett));
}
void
proto_reg_handoff_arcnet (void)
{
dissector_handle_t arcnet_handle;
arcnet_handle = create_dissector_handle (dissect_arcnet, proto_arcnet);
dissector_add ("wtap_encap", WTAP_ENCAP_ARCNET, arcnet_handle);
data_handle = find_dissector ("data");
}
|
