![Guy Harris](/assets/img/avatar_default.png)
Bug: 10637 Change-Id: Ifd4094f308246e92500cc7149c0d42c8496fb9f4 Reviewed-on: https://code.wireshark.org/review/5005 Reviewed-by: Guy Harris <guy@alum.mit.edu>
673 lines
19 KiB
C
673 lines
19 KiB
C
/* packet-ieee80211-radio.c
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* Routines for pseudo 802.11 header dissection
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Copied from README.developer
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <wiretap/wtap.h>
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#include "packet-ieee80211.h"
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void proto_register_ieee80211_radio(void);
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void proto_reg_handoff_ieee80211_radio(void);
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static dissector_handle_t ieee80211_handle;
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static int proto_radio = -1;
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/* ************************************************************************* */
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/* Header field info values for radio information */
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/* ************************************************************************* */
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static int hf_data_rate = -1;
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static int hf_mcs_index = -1;
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static int hf_bandwidth = -1;
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static int hf_short_gi = -1;
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static int hf_channel = -1;
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static int hf_frequency = -1;
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static int hf_signal_percent = -1;
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static int hf_signal_dbm = -1;
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static int hf_noise_percent = -1;
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static int hf_noise_dbm = -1;
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static const value_string bandwidth_vals[] = {
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{ PHDR_802_11_BANDWIDTH_20_MHZ, "20 MHz" },
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{ PHDR_802_11_BANDWIDTH_40_MHZ, "40 MHz" },
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{ PHDR_802_11_BANDWIDTH_20_20L, "20 MHz + 20 MHz lower" },
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{ PHDR_802_11_BANDWIDTH_20_20U, "20 MHz + 20 MHz upper" },
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{ 0, NULL }
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};
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/*
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* Data rates corresponding to a given 802.11n MCS index, bandwidth, and
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* guard interval.
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*
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* Indices are:
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*
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* the MCS index (0-76);
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*
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* 0 for 20 MHz, 1 for 40 MHz;
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*
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* 0 for a long guard interval, 1 for a short guard interval.
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*/
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WS_DLL_PUBLIC_DEF
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const float ieee80211_float_htrates[MAX_MCS_INDEX+1][2][2] = {
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/* MCS 0 */
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{ /* 20 Mhz */ { 6.5f, /* SGI */ 7.2f, },
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/* 40 Mhz */ { 13.5f, /* SGI */ 15.0f, },
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},
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/* MCS 1 */
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{ /* 20 Mhz */ { 13.0f, /* SGI */ 14.4f, },
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/* 40 Mhz */ { 27.0f, /* SGI */ 30.0f, },
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},
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/* MCS 2 */
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{ /* 20 Mhz */ { 19.5f, /* SGI */ 21.7f, },
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/* 40 Mhz */ { 40.5f, /* SGI */ 45.0f, },
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},
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/* MCS 3 */
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{ /* 20 Mhz */ { 26.0f, /* SGI */ 28.9f, },
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/* 40 Mhz */ { 54.0f, /* SGI */ 60.0f, },
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},
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/* MCS 4 */
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{ /* 20 Mhz */ { 39.0f, /* SGI */ 43.3f, },
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/* 40 Mhz */ { 81.0f, /* SGI */ 90.0f, },
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},
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/* MCS 5 */
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{ /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, },
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/* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, },
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},
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/* MCS 6 */
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{ /* 20 Mhz */ { 58.5f, /* SGI */ 65.0f, },
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/* 40 Mhz */ { 121.5f, /* SGI */ 135.0f, },
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},
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/* MCS 7 */
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{ /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, },
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/* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, },
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},
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/* MCS 8 */
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{ /* 20 Mhz */ { 13.0f, /* SGI */ 14.4f, },
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/* 40 Mhz */ { 27.0f, /* SGI */ 30.0f, },
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},
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/* MCS 9 */
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{ /* 20 Mhz */ { 26.0f, /* SGI */ 28.9f, },
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/* 40 Mhz */ { 54.0f, /* SGI */ 60.0f, },
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},
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/* MCS 10 */
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{ /* 20 Mhz */ { 39.0f, /* SGI */ 43.3f, },
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/* 40 Mhz */ { 81.0f, /* SGI */ 90.0f, },
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},
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/* MCS 11 */
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{ /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, },
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/* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, },
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},
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/* MCS 12 */
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{ /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, },
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/* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, },
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},
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/* MCS 13 */
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{ /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, },
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/* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, },
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},
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/* MCS 14 */
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{ /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, },
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/* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, },
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},
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/* MCS 15 */
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{ /* 20 Mhz */ { 130.0f, /* SGI */ 144.4f, },
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/* 40 Mhz */ { 270.0f, /* SGI */ 300.0f, },
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},
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/* MCS 16 */
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{ /* 20 Mhz */ { 19.5f, /* SGI */ 21.7f, },
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/* 40 Mhz */ { 40.5f, /* SGI */ 45.0f, },
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},
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/* MCS 17 */
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{ /* 20 Mhz */ { 39.0f, /* SGI */ 43.3f, },
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/* 40 Mhz */ { 81.0f, /* SGI */ 90.0f, },
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},
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/* MCS 18 */
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{ /* 20 Mhz */ { 58.5f, /* SGI */ 65.0f, },
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/* 40 Mhz */ { 121.5f, /* SGI */ 135.0f, },
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},
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/* MCS 19 */
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{ /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, },
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/* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, },
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},
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/* MCS 20 */
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{ /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, },
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/* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, },
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},
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/* MCS 21 */
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{ /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, },
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/* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, },
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},
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/* MCS 22 */
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{ /* 20 Mhz */ { 175.5f, /* SGI */ 195.0f, },
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/* 40 Mhz */ { 364.5f, /* SGI */ 405.0f, },
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},
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/* MCS 23 */
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{ /* 20 Mhz */ { 195.0f, /* SGI */ 216.7f, },
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/* 40 Mhz */ { 405.0f, /* SGI */ 450.0f, },
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},
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/* MCS 24 */
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{ /* 20 Mhz */ { 26.0f, /* SGI */ 28.9f, },
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/* 40 Mhz */ { 54.0f, /* SGI */ 60.0f, },
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},
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/* MCS 25 */
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{ /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, },
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/* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, },
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},
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/* MCS 26 */
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{ /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, },
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/* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, },
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},
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/* MCS 27 */
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{ /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, },
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/* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, },
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},
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/* MCS 28 */
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{ /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, },
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/* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, },
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},
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/* MCS 29 */
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{ /* 20 Mhz */ { 208.0f, /* SGI */ 231.1f, },
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/* 40 Mhz */ { 432.0f, /* SGI */ 480.0f, },
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},
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/* MCS 30 */
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{ /* 20 Mhz */ { 234.0f, /* SGI */ 260.0f, },
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/* 40 Mhz */ { 486.0f, /* SGI */ 540.0f, },
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},
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/* MCS 31 */
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{ /* 20 Mhz */ { 260.0f, /* SGI */ 288.9f, },
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/* 40 Mhz */ { 540.0f, /* SGI */ 600.0f, },
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},
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/* MCS 32 */
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{ /* 20 Mhz */ { 0.0f, /* SGI */ 0.0f, }, /* not valid */
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/* 40 Mhz */ { 6.0f, /* SGI */ 6.7f, },
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},
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/* MCS 33 */
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{ /* 20 Mhz */ { 39.0f, /* SGI */ 43.3f, },
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/* 40 Mhz */ { 81.0f, /* SGI */ 90.0f, },
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},
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/* MCS 34 */
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{ /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, },
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/* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, },
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},
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/* MCS 35 */
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{ /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, },
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/* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, },
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},
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/* MCS 36 */
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{ /* 20 Mhz */ { 58.5f, /* SGI */ 65.0f, },
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/* 40 Mhz */ { 121.5f, /* SGI */ 135.0f, },
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},
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/* MCS 37 */
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{ /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, },
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/* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, },
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},
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/* MCS 38 */
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{ /* 20 Mhz */ { 97.5f, /* SGI */ 108.3f, },
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/* 40 Mhz */ { 202.5f, /* SGI */ 225.0f, },
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},
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/* MCS 39 */
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{ /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, },
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/* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, },
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},
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/* MCS 40 */
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{ /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, },
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/* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, },
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},
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/* MCS 41 */
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{ /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, },
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/* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, },
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},
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/* MCS 42 */
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{ /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, },
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/* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, },
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},
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/* MCS 43 */
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{ /* 20 Mhz */ { 91.0f, /* SGI */ 101.1f, },
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/* 40 Mhz */ { 189.0f, /* SGI */ 210.0f, },
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},
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/* MCS 44 */
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{ /* 20 Mhz */ { 91.0f, /* SGI */ 101.1f, },
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/* 40 Mhz */ { 189.0f, /* SGI */ 210.0f, },
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},
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/* MCS 45 */
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{ /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, },
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/* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, },
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},
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/* MCS 46 */
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{ /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, },
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/* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, },
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},
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/* MCS 47 */
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{ /* 20 Mhz */ { 97.5f, /* SGI */ 108.3f, },
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/* 40 Mhz */ { 202.5f, /* SGI */ 225.0f, },
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},
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/* MCS 48 */
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{ /* 20 Mhz */ { 97.5f, /* SGI */ 108.3f, },
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/* 40 Mhz */ { 202.5f, /* SGI */ 225.0f, },
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},
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/* MCS 49 */
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{ /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, },
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/* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, },
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},
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/* MCS 50 */
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{ /* 20 Mhz */ { 136.5f, /* SGI */ 151.7f, },
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/* 40 Mhz */ { 283.5f, /* SGI */ 315.0f, },
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},
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/* MCS 51 */
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{ /* 20 Mhz */ { 136.5f, /* SGI */ 151.7f, },
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/* 40 Mhz */ { 283.5f, /* SGI */ 315.0f, },
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},
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/* MCS 52 */
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{ /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, },
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/* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, },
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},
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/* MCS 53 */
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{ /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, },
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/* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, },
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},
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/* MCS 54 */
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{ /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, },
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/* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, },
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},
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/* MCS 55 */
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{ /* 20 Mhz */ { 91.0f, /* SGI */ 101.1f, },
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/* 40 Mhz */ { 189.0f, /* SGI */ 210.0f, },
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},
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/* MCS 56 */
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{ /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, },
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/* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, },
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},
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/* MCS 57 */
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{ /* 20 Mhz */ { 91.0f, /* SGI */ 101.1f, },
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/* 40 Mhz */ { 189.0f, /* SGI */ 210.0f, },
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},
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/* MCS 58 */
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{ /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, },
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/* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, },
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},
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/* MCS 59 */
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{ /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, },
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/* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, },
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},
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/* MCS 60 */
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{ /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, },
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/* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, },
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},
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/* MCS 61 */
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{ /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, },
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/* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, },
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},
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/* MCS 62 */
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{ /* 20 Mhz */ { 130.0f, /* SGI */ 144.4f, },
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/* 40 Mhz */ { 270.0f, /* SGI */ 300.0f, },
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},
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/* MCS 63 */
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{ /* 20 Mhz */ { 130.0f, /* SGI */ 144.4f, },
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/* 40 Mhz */ { 270.0f, /* SGI */ 300.0f, },
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},
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/* MCS 64 */
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{ /* 20 Mhz */ { 143.0f, /* SGI */ 158.9f, },
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/* 40 Mhz */ { 297.0f, /* SGI */ 330.0f, },
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},
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/* MCS 65 */
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{ /* 20 Mhz */ { 97.5f, /* SGI */ 108.3f, },
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/* 40 Mhz */ { 202.5f, /* SGI */ 225.0f, },
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},
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/* MCS 66 */
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{ /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, },
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/* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, },
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},
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/* MCS 67 */
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{ /* 20 Mhz */ { 136.5f, /* SGI */ 151.7f, },
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/* 40 Mhz */ { 283.5f, /* SGI */ 315.0f, },
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},
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/* MCS 68 */
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{ /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, },
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/* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, },
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},
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/* MCS 69 */
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{ /* 20 Mhz */ { 136.5f, /* SGI */ 151.7f, },
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/* 40 Mhz */ { 283.5f, /* SGI */ 315.0f, },
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},
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/* MCS 70 */
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{ /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, },
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/* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, },
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},
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/* MCS 71 */
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{ /* 20 Mhz */ { 175.5f, /* SGI */ 195.0f, },
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/* 40 Mhz */ { 364.5f, /* SGI */ 405.0f, },
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},
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/* MCS 72 */
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{ /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, },
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/* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, },
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},
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/* MCS 73 */
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{ /* 20 Mhz */ { 175.5f, /* SGI */ 195.0f, },
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/* 40 Mhz */ { 364.5f, /* SGI */ 405.0f, },
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},
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/* MCS 74 */
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{ /* 20 Mhz */ { 195.0f, /* SGI */ 216.7f, },
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/* 40 Mhz */ { 405.0f, /* SGI */ 450.0f, },
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},
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/* MCS 75 */
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{ /* 20 Mhz */ { 195.0f, /* SGI */ 216.7f, },
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/* 40 Mhz */ { 405.0f, /* SGI */ 450.0f, },
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},
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/* MCS 76 */
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{ /* 20 Mhz */ { 214.5f, /* SGI */ 238.3f, },
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/* 40 Mhz */ { 445.5f, /* SGI */ 495.0f, },
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},
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|
};
|
|
|
|
static gint ett_radio = -1;
|
|
|
|
/*
|
|
* Dissect 802.11 with a variable-length link-layer header and a pseudo-
|
|
* header containing radio information.
|
|
*/
|
|
static void
|
|
dissect_radio (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
|
|
{
|
|
proto_item *ti = NULL;
|
|
proto_tree *radio_tree = NULL;
|
|
float data_rate = 0.0f;
|
|
gboolean have_data_rate = FALSE;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Radio");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
/* Calculate the data rate, if we have the necessary data */
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_DATA_RATE) {
|
|
data_rate = pinfo->pseudo_header->ieee_802_11.data_rate * 0.5f;
|
|
have_data_rate = TRUE;
|
|
} else {
|
|
/* Do we have all the fields we need to look it up? */
|
|
#define PHDR_802_11_ALL_MCS_FIELDS \
|
|
(PHDR_802_11_HAS_MCS_INDEX | \
|
|
PHDR_802_11_HAS_BANDWIDTH | \
|
|
PHDR_802_11_HAS_SHORT_GI)
|
|
|
|
guint bandwidth_40;
|
|
|
|
if ((pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_ALL_MCS_FIELDS) == PHDR_802_11_ALL_MCS_FIELDS) {
|
|
bandwidth_40 =
|
|
(pinfo->pseudo_header->ieee_802_11.bandwidth == PHDR_802_11_BANDWIDTH_40_MHZ) ?
|
|
1 : 0;
|
|
if (pinfo->pseudo_header->ieee_802_11.mcs_index < MAX_MCS_INDEX) {
|
|
data_rate = ieee80211_float_htrates[pinfo->pseudo_header->ieee_802_11.mcs_index][bandwidth_40][pinfo->pseudo_header->ieee_802_11.short_gi];
|
|
have_data_rate = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Add the radio information to the column information */
|
|
if (have_data_rate)
|
|
col_add_fstr(pinfo->cinfo, COL_TX_RATE, "%.1f", data_rate);
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_SIGNAL_PERCENT) {
|
|
/*
|
|
* For tagged Peek files, this is presumably signal strength as a
|
|
* percentage of the maximum, as it is for classic Peek files,
|
|
* i.e. (RXVECTOR RSSI/RXVECTOR RSSI_Max)*100, or, at least, that's
|
|
* what I infer it is, given what the WildPackets note "Converting
|
|
* Signal Strength Percentage to dBm Values" says.
|
|
*
|
|
* It also says that the conversion the percentage to a dBm value is
|
|
* an adapter-dependent process, so, as we don't know what type of
|
|
* adapter was used to do the capture, we can't do the conversion.
|
|
*
|
|
* It's *probably* something similar for other capture file formats.
|
|
*/
|
|
col_add_fstr(pinfo->cinfo, COL_RSSI, "%u%%",
|
|
pinfo->pseudo_header->ieee_802_11.signal_percent);
|
|
}
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_radio, tvb, 0, 0, ENC_NA);
|
|
radio_tree = proto_item_add_subtree (ti, ett_radio);
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_MCS_INDEX) {
|
|
proto_tree_add_uint(radio_tree, hf_mcs_index, tvb, 0, 0,
|
|
pinfo->pseudo_header->ieee_802_11.mcs_index);
|
|
}
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_BANDWIDTH) {
|
|
proto_tree_add_uint(radio_tree, hf_bandwidth, tvb, 0, 0,
|
|
pinfo->pseudo_header->ieee_802_11.bandwidth);
|
|
}
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_SHORT_GI) {
|
|
proto_tree_add_boolean(radio_tree, hf_short_gi, tvb, 0, 0,
|
|
pinfo->pseudo_header->ieee_802_11.short_gi);
|
|
}
|
|
|
|
if (have_data_rate) {
|
|
proto_tree_add_float_format_value(radio_tree, hf_data_rate, tvb, 0, 0,
|
|
data_rate,
|
|
"%.1f Mb/s",
|
|
data_rate);
|
|
}
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_CHANNEL) {
|
|
proto_tree_add_uint(radio_tree, hf_channel, tvb, 0, 0,
|
|
pinfo->pseudo_header->ieee_802_11.channel);
|
|
}
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_FREQUENCY) {
|
|
proto_tree_add_uint_format_value(radio_tree, hf_frequency, tvb, 0, 0,
|
|
pinfo->pseudo_header->ieee_802_11.frequency,
|
|
"%u MHz",
|
|
pinfo->pseudo_header->ieee_802_11.frequency);
|
|
}
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_SIGNAL_PERCENT) {
|
|
proto_tree_add_uint_format_value(radio_tree, hf_signal_percent, tvb, 0, 0,
|
|
pinfo->pseudo_header->ieee_802_11.signal_percent,
|
|
"%u%%",
|
|
pinfo->pseudo_header->ieee_802_11.signal_percent);
|
|
}
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_SIGNAL_DBM) {
|
|
proto_tree_add_int_format_value(radio_tree, hf_signal_dbm, tvb, 0, 0,
|
|
pinfo->pseudo_header->ieee_802_11.signal_dbm,
|
|
"%d dBm",
|
|
pinfo->pseudo_header->ieee_802_11.signal_dbm);
|
|
}
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_NOISE_PERCENT) {
|
|
proto_tree_add_uint_format_value(radio_tree, hf_noise_percent, tvb, 0, 0,
|
|
pinfo->pseudo_header->ieee_802_11.noise_percent,
|
|
"%u%%",
|
|
pinfo->pseudo_header->ieee_802_11.noise_percent);
|
|
}
|
|
|
|
if (pinfo->pseudo_header->ieee_802_11.presence_flags & PHDR_802_11_HAS_NOISE_DBM) {
|
|
proto_tree_add_int_format_value(radio_tree, hf_noise_dbm, tvb, 0, 0,
|
|
pinfo->pseudo_header->ieee_802_11.noise_dbm,
|
|
"%d dBm",
|
|
pinfo->pseudo_header->ieee_802_11.noise_dbm);
|
|
}
|
|
}
|
|
|
|
/* dissect the 802.11 header next */
|
|
pinfo->current_proto = "IEEE 802.11";
|
|
call_dissector(ieee80211_handle, tvb, pinfo, tree);
|
|
}
|
|
|
|
static hf_register_info hf_radio[] = {
|
|
{&hf_data_rate,
|
|
{"Data rate", "wlan.data_rate", FT_FLOAT, BASE_NONE, NULL, 0,
|
|
"Data rate (bits/s)", HFILL }},
|
|
|
|
{&hf_mcs_index,
|
|
{"MCS index", "wlan.mcs_index", FT_UINT32, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }},
|
|
|
|
{&hf_bandwidth,
|
|
{"Bandwidth", "wlan.bandwidth", FT_UINT32, BASE_DEC, VALS(bandwidth_vals), 0,
|
|
NULL, HFILL }},
|
|
|
|
{&hf_short_gi,
|
|
{"Short GI", "wlan.short_gi", FT_BOOLEAN, 0, NULL, 0,
|
|
NULL, HFILL }},
|
|
|
|
{&hf_channel,
|
|
{"Channel", "wlan.channel", FT_UINT8, BASE_DEC, NULL, 0,
|
|
"802.11 channel number that this frame was sent/received on", HFILL }},
|
|
|
|
{&hf_frequency,
|
|
{"Frequency", "wlan.frequency", FT_UINT16, BASE_DEC, NULL, 0,
|
|
"Center frequency of the 802.11 channel that this frame was sent/received on", HFILL }},
|
|
|
|
{&hf_signal_percent,
|
|
{"Signal strength (percentage)", "wlan.signal_dbm", FT_UINT8, BASE_DEC, NULL, 0,
|
|
"Signal strength, as percentage of maximum RSSI", HFILL }},
|
|
|
|
{&hf_signal_dbm,
|
|
{"Signal strength (dBm)", "wlan.signal_dbm", FT_INT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }},
|
|
|
|
{&hf_noise_percent,
|
|
{"Noise level (percentage)", "wlan.noise_percentage", FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }},
|
|
|
|
{&hf_noise_dbm,
|
|
{"Noise level (dBm)", "wlan.noise_dbm", FT_INT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL }},
|
|
};
|
|
|
|
static gint *tree_array[] = {
|
|
&ett_radio
|
|
};
|
|
|
|
void proto_register_ieee80211_radio(void)
|
|
{
|
|
proto_radio = proto_register_protocol("802.11 radio information", "Radio",
|
|
"radio");
|
|
proto_register_field_array(proto_radio, hf_radio, array_length(hf_radio));
|
|
proto_register_subtree_array(tree_array, array_length(tree_array));
|
|
}
|
|
|
|
void proto_reg_handoff_ieee80211_radio(void)
|
|
{
|
|
dissector_handle_t radio_handle;
|
|
|
|
/* Register handoff to radio-header dissectors */
|
|
radio_handle = create_dissector_handle(dissect_radio, proto_radio);
|
|
dissector_add_uint("wtap_encap", WTAP_ENCAP_IEEE_802_11_WITH_RADIO,
|
|
radio_handle);
|
|
ieee80211_handle = find_dissector("wlan");
|
|
}
|
|
|
|
/*
|
|
* Editor modelines
|
|
*
|
|
* Local Variables:
|
|
* c-basic-offset: 2
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* ex: set shiftwidth=2 tabstop=8 expandtab:
|
|
* :indentSize=2:tabSize=8:noTabs=true:
|
|
*/
|