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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/* packet-wsmp.c
* Routines for WAVE Short Message dissection (WSMP)
* Copyright 2008, Arada Systems (http://www.aradasystems.com) (email: siva@aradasystems.com)
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Copied from README.developer
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <epan/packet.h>
#include <epan/etypes.h>
static dissector_handle_t data_handle;
/* Initialize the protocol and registered fields */
static int proto_wsmp = -1;
static int hf_wsmp_version = -1;
static int hf_wsmp_security = -1;
static int hf_wsmp_rate = -1;
static int hf_wsmp_channel = -1;
static int hf_wsmp_txpower = -1;
static int hf_wsmp_appclass = -1;
static int hf_wsmp_acmlength = -1;
static int hf_wsmp_acm = -1;
static int hf_wsmp_wsmlength = -1;
/* Initialize the subtree pointers */
static gint ett_wsmp = -1;
static gint ett_wsmdata = -1;
/* Code to actually dissect the packets */
static void
dissect_wsmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *ti, *wsmdata_item;
proto_tree *wsmp_tree, *wsmdata_tree;
tvbuff_t *wsmdata_tvb;
guint16 acmlength, wsmlength, offset;
char* acm;
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "WSMP");
col_set_str(pinfo->cinfo, COL_INFO, "WAVE Short Message Protocol IEEE P1609.3");
if (tree) {
/* create display subtree for the protocol */
ti = proto_tree_add_item(tree, proto_wsmp, tvb, 0, -1, FALSE);
wsmp_tree = proto_item_add_subtree(ti, ett_wsmp);
offset = 0;
proto_tree_add_item(wsmp_tree,
hf_wsmp_version, tvb, offset, 1, FALSE);
offset ++;
proto_tree_add_item(wsmp_tree,
hf_wsmp_security, tvb, offset, 1, FALSE);
offset ++;
proto_tree_add_item(wsmp_tree,
hf_wsmp_channel, tvb, offset, 1, FALSE);
offset ++;
proto_tree_add_item(wsmp_tree,
hf_wsmp_rate, tvb, offset, 1, FALSE);
offset ++;
proto_tree_add_item(wsmp_tree,
hf_wsmp_txpower, tvb, offset, 1, FALSE);
offset ++;
proto_tree_add_item(wsmp_tree,
hf_wsmp_appclass, tvb, offset, 1, FALSE);
offset ++;
acmlength = tvb_get_guint8(tvb,offset);
proto_tree_add_item(wsmp_tree,
hf_wsmp_acmlength, tvb, offset, 1, FALSE);
offset ++;
acm = tvb_get_ephemeral_string(tvb, offset, acmlength);
proto_tree_add_item(wsmp_tree, hf_wsmp_acm, tvb, offset, acmlength, FALSE);
offset +=acmlength;
wsmlength = tvb_get_letohs( tvb, offset);
proto_tree_add_item(wsmp_tree,
hf_wsmp_wsmlength, tvb, offset, 2, TRUE);
offset += 2;
wsmdata_item = proto_tree_add_text (wsmp_tree, tvb, offset, wsmlength,
"Wave Short Message");
wsmdata_tree = proto_item_add_subtree(wsmdata_item, ett_wsmdata);
/* TODO: Branch on the application context and display accordingly
* Default call the data dissector
*/
wsmdata_tvb = tvb_new_subset(tvb, offset,wsmlength, wsmlength);
call_dissector(data_handle, wsmdata_tvb, pinfo, wsmdata_tree);
}
}
/* Register the protocol with Wireshark */
/* this format is require because a script is used to build the C function
that calls all the protocol registration.
*/
void
proto_register_wsmp(void)
{
/* Setup list of header fields See Section 1.6.1 for details*/
static hf_register_info hf[] = {
{ &hf_wsmp_version,
{ "Version", "wsmp.version", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_wsmp_security,
{ "Security", "wsmp.security", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_wsmp_channel,
{ "Channel", "wsmp.channel", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_wsmp_rate,
{ "Rate", "wsmp.rate", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_wsmp_txpower,
{ "Transmit power", "wsmp.txpower", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_wsmp_appclass,
{ "App class", "wsmp.appclass", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_wsmp_acmlength,
{ "Acm Length", "wsmp.acmlength", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_wsmp_acm,
{ "Application Context Data", "wsmp.acm", FT_STRING,
BASE_NONE, NULL, 0x0, "Acm", HFILL }},
{ &hf_wsmp_wsmlength,
{ "WSM Length", "wsmp.wsmlength", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_wsmp,
&ett_wsmdata,
};
/* Register the protocol name and description */
proto_wsmp = proto_register_protocol("Wave Short Message Protocol(IEEE P1609.3)",
"WSMP", "wsmp");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_wsmp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
/* If this dissector uses sub-dissector registration add a registration routine.
This exact format is required because a script is used to find these routines
and create the code that calls these routines.
*/
void
proto_reg_handoff_wsmp(void)
{
dissector_handle_t wsmp_handle;
wsmp_handle = create_dissector_handle(dissect_wsmp, proto_wsmp);
dissector_add_uint("ethertype", ETHERTYPE_WSMP, wsmp_handle);
data_handle = find_dissector("data");
return;
}
|
