748d012012
packet; don't hand that gunk to the 802.11 dissector. svn path=/trunk/; revision=4773
138 lines
4 KiB
C
138 lines
4 KiB
C
/* 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);
|
|
}
|