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
|
/* packet-airopeek.c
* Routines for AiroPeek capture file dissection
*
* $Id: packet-airopeek.c,v 1.3 2002/02/22 07:15:28 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#include <glib.h>
#include <epan/packet.h>
#include "packet-ieee80211.h"
/* protocol */
static int proto_airopeek = -1;
/* header fields */
static int hf_airopeek_data_rate = -1;
static int hf_airopeek_channel = -1;
static int hf_airopeek_signal_strength = -1;
static gint ett_airopeek = -1;
static dissector_handle_t ieee80211_handle;
static void
dissect_airopeek(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *airopeek_tree;
proto_item *ti;
guint8 data_rate;
guint8 signal_strength;
tvbuff_t *next_tvb;
gint length, reported_length;
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AiroPeek");
if (check_col(pinfo->cinfo, COL_INFO))
col_clear(pinfo->cinfo, COL_INFO);
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_airopeek,
tvb, 0, 3, "AiroPeek Radio Information");
airopeek_tree = proto_item_add_subtree(ti, ett_airopeek);
data_rate = tvb_get_guint8(tvb, 0);
proto_tree_add_uint_format(airopeek_tree, hf_airopeek_data_rate,
tvb, 0, 1, data_rate,
"Data Rate: %g mb/s", .5*data_rate);
proto_tree_add_item(airopeek_tree, hf_airopeek_channel,
tvb, 1, 1, FALSE);
signal_strength = tvb_get_guint8(tvb, 2);
proto_tree_add_uint_format(airopeek_tree, hf_airopeek_data_rate,
tvb, 2, 1, data_rate,
"Signal Strength: %u%%", signal_strength);
}
/*
* Dissect the 802.11 header and data.
* The last 4 bytes appear to be random data - the length might
* include the FCS - so we reduce the length by 4.
*/
length = tvb_ensure_length_remaining(tvb, 4);
reported_length = tvb_reported_length_remaining(tvb, 4);
if (reported_length < 4)
THROW(ReportedBoundsError);
reported_length -= 4;
if (length > reported_length)
length = reported_length;
next_tvb = tvb_new_subset(tvb, 4, length, reported_length);
call_dissector(ieee80211_handle, next_tvb, pinfo, tree);
}
void
proto_register_airopeek(void)
{
static hf_register_info hf[] = {
{ &hf_airopeek_data_rate,
{ "Data Rate", "airopeek.data_rate", FT_UINT8, BASE_DEC, NULL,
0x0, "", HFILL}},
{ &hf_airopeek_channel,
{ "Channel", "airopeek.channel", FT_UINT8, BASE_DEC, NULL,
0x0, "", HFILL}},
{ &hf_airopeek_signal_strength,
{ "Signal Strength", "airopeek.signal_strength", FT_UINT8, BASE_DEC, NULL,
0x0, "", HFILL}},
};
static gint *ett[] = {
&ett_airopeek
};
proto_airopeek = proto_register_protocol("AiroPeek radio information",
"AiroPeek", "airopeek");
proto_register_field_array(proto_airopeek, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_airopeek(void)
{
dissector_handle_t airopeek_handle;
/* handle for 802.11 dissector */
ieee80211_handle = find_dissector("wlan");
airopeek_handle = create_dissector_handle(dissect_airopeek,
proto_airopeek);
dissector_add("wtap_encap", WTAP_ENCAP_AIROPEEK, airopeek_handle);
}
|
