1525 lines
57 KiB
C
1525 lines
57 KiB
C
/* packet-ieee80211-radio.c
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* Routines for pseudo 802.11 header dissection and radio packet timing calculation
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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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* Copyright 2012 Parc Inc and Samsung Electronics
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* Copyright 2015, 2016 & 2017 Cisco Inc
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*
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* Copied from README.developer
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/expert.h>
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#include <wiretap/wtap.h>
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#include <epan/prefs.h>
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#include <epan/proto_data.h>
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#include <epan/tap.h>
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#include "packet-ieee80211.h"
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#include "packet-ieee80211-radio.h"
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#include "math.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 wlan_radio_handle;
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static dissector_handle_t wlan_noqos_radio_handle;
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static dissector_handle_t ieee80211_handle;
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static dissector_handle_t ieee80211_noqos_handle;
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static int proto_wlan_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_wlan_radio_phy = -1;
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static int hf_wlan_radio_11_fhss_hop_set = -1;
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static int hf_wlan_radio_11_fhss_hop_pattern = -1;
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static int hf_wlan_radio_11_fhss_hop_index = -1;
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static int hf_wlan_radio_11a_channel_type = -1;
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static int hf_wlan_radio_11a_turbo_type = -1;
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static int hf_wlan_radio_11g_mode = -1;
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static int hf_wlan_radio_11n_mcs_index = -1;
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static int hf_wlan_radio_11n_bandwidth = -1;
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static int hf_wlan_radio_11n_short_gi = -1;
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static int hf_wlan_radio_11n_greenfield = -1;
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static int hf_wlan_radio_11n_fec = -1;
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static int hf_wlan_radio_11n_stbc_streams = -1;
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static int hf_wlan_radio_11n_ness = -1;
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static int hf_wlan_radio_11ac_stbc = -1;
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static int hf_wlan_radio_11ac_txop_ps_not_allowed = -1;
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static int hf_wlan_radio_11ac_short_gi = -1;
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static int hf_wlan_radio_11ac_short_gi_nsym_disambig = -1;
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static int hf_wlan_radio_11ac_ldpc_extra_ofdm_symbol = -1;
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static int hf_wlan_radio_11ac_beamformed = -1;
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static int hf_wlan_radio_11ac_bandwidth = -1;
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static int hf_wlan_radio_11ac_user = -1;
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static int hf_wlan_radio_11ac_nsts = -1;
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static int hf_wlan_radio_11ac_mcs = -1;
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static int hf_wlan_radio_11ac_nss = -1;
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static int hf_wlan_radio_11ac_fec = -1;
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static int hf_wlan_radio_11ac_gid = -1;
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static int hf_wlan_radio_11ac_p_aid = -1;
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static int hf_wlan_radio_data_rate = -1;
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static int hf_wlan_radio_channel = -1;
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static int hf_wlan_radio_frequency = -1;
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static int hf_wlan_radio_short_preamble = -1;
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static int hf_wlan_radio_signal_percent = -1;
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static int hf_wlan_radio_signal_dbm = -1;
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static int hf_wlan_radio_noise_percent = -1;
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static int hf_wlan_radio_noise_dbm = -1;
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static int hf_wlan_radio_timestamp = -1;
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static int hf_wlan_last_part_of_a_mpdu = -1;
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static int hf_wlan_a_mpdu_delim_crc_error = -1;
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static int hf_wlan_a_mpdu_aggregate_id = -1;
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static int hf_wlan_radio_duration = -1;
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static int hf_wlan_radio_preamble = -1;
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static int hf_wlan_radio_aggregate = -1;
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static int hf_wlan_radio_aggregate_duration = -1;
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static int hf_wlan_radio_ifs = -1;
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static int hf_wlan_radio_start_tsf = -1;
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static int hf_wlan_radio_end_tsf = -1;
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static expert_field ei_wlan_radio_assumed_short_preamble = EI_INIT;
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static expert_field ei_wlan_radio_assumed_non_greenfield = EI_INIT;
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static expert_field ei_wlan_radio_assumed_no_stbc = EI_INIT;
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static expert_field ei_wlan_radio_assumed_no_extension_streams = EI_INIT;
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static expert_field ei_wlan_radio_assumed_bcc_fec = EI_INIT;
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static int wlan_radio_timeline_tap = -1;
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/* Settings */
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static gboolean wlan_radio_always_short_preamble = FALSE;
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static gboolean wlan_radio_tsf_at_end = TRUE;
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static gboolean wlan_radio_timeline_enabled = FALSE;
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static const value_string phy_vals[] = {
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{ PHDR_802_11_PHY_11_FHSS, "802.11 FHSS" },
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{ PHDR_802_11_PHY_11_IR, "802.11 IR" },
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{ PHDR_802_11_PHY_11_DSSS, "802.11 DSSS" },
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{ PHDR_802_11_PHY_11B, "802.11b" },
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{ PHDR_802_11_PHY_11A, "802.11a" },
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{ PHDR_802_11_PHY_11G, "802.11g" },
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{ PHDR_802_11_PHY_11N, "802.11n" },
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{ PHDR_802_11_PHY_11AC, "802.11ac" },
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{ 0, NULL }
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};
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static const value_string channel_type_11a_vals[] = {
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{ PHDR_802_11A_CHANNEL_TYPE_NORMAL, "Normal" },
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{ PHDR_802_11A_CHANNEL_TYPE_HALF_CLOCKED, "Half-clocked" },
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{ PHDR_802_11A_CHANNEL_TYPE_QUARTER_CLOCKED, "Quarter-clocked" },
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{ 0, NULL }
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};
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static const value_string turbo_type_11a_vals[] = {
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{ PHDR_802_11A_TURBO_TYPE_NORMAL, "Non-turbo" },
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{ PHDR_802_11A_TURBO_TYPE_TURBO, "Turbo" },
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{ PHDR_802_11A_TURBO_TYPE_DYNAMIC_TURBO, "Dynamic turbo" },
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{ PHDR_802_11A_TURBO_TYPE_STATIC_TURBO, "Static turbo" },
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{ 0, NULL }
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};
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static const value_string mode_11g_vals[] = {
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{ PHDR_802_11G_MODE_NORMAL, "None" },
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{ PHDR_802_11G_MODE_SUPER_G, "Super G" },
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{ 0, NULL }
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};
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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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{ PHDR_802_11_BANDWIDTH_80_MHZ, "80 MHz" },
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{ PHDR_802_11_BANDWIDTH_40_40L, "40 MHz + 40 MHz lower" },
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{ PHDR_802_11_BANDWIDTH_40_40U, "40 MHz + 40 MHz upper" },
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{ PHDR_802_11_BANDWIDTH_20LL, "20 MHz, channel 1/4" },
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{ PHDR_802_11_BANDWIDTH_20LU, "20 MHz, channel 2/4" },
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{ PHDR_802_11_BANDWIDTH_20UL, "20 MHz, channel 3/4" },
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{ PHDR_802_11_BANDWIDTH_20UU, "20 MHz, channel 4/4" },
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{ PHDR_802_11_BANDWIDTH_160_MHZ, "160 MHz" },
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{ PHDR_802_11_BANDWIDTH_80_80L, "80 MHz + 80 MHz lower" },
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{ PHDR_802_11_BANDWIDTH_80_80U, "80 MHz + 80 MHz upper" },
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{ PHDR_802_11_BANDWIDTH_40LL, "40 MHz, channel 1/4" },
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{ PHDR_802_11_BANDWIDTH_40LU, "40 MHz, channel 2/4" },
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{ PHDR_802_11_BANDWIDTH_40UL, "40 MHz, channel 3/4" },
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{ PHDR_802_11_BANDWIDTH_40UU, "40 MHz, channel 4/4" },
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{ PHDR_802_11_BANDWIDTH_20LLL, "20 MHz, channel 1/8" },
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{ PHDR_802_11_BANDWIDTH_20LLU, "20 MHz, channel 2/8" },
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{ PHDR_802_11_BANDWIDTH_20LUL, "20 MHz, channel 3/8" },
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{ PHDR_802_11_BANDWIDTH_20LUU, "20 MHz, channel 4/8" },
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{ PHDR_802_11_BANDWIDTH_20ULL, "20 MHz, channel 5/8" },
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{ PHDR_802_11_BANDWIDTH_20ULU, "20 MHz, channel 6/8" },
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{ PHDR_802_11_BANDWIDTH_20UUL, "20 MHz, channel 7/8" },
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{ PHDR_802_11_BANDWIDTH_20UUU, "20 MHz, channel 8/8" },
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{ 0, NULL }
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};
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static const value_string fec_vals[] = {
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{ 0, "BEC" },
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{ 1, "LDPC" },
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{ 0, NULL }
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};
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/*
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* Lookup for the MCS index (0-76)
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* returning the number of data bits per symbol
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* assumes 52 subcarriers (20MHz)
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* symbols are 4us for long guard interval, 3.6us for short guard interval
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* Note: MCS 32 is special - only valid for 40Mhz channel.
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*/
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WS_DLL_PUBLIC_DEF const guint16 ieee80211_ht_Dbps[MAX_MCS_INDEX+1] = {
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/* MCS 0 - 1 stream */
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26, 52, 78, 104, 156, 208, 234, 260,
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/* MCS 8 - 2 stream */
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52, 104, 156, 208, 312, 416, 468, 520,
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/* MCS 16 - 3 stream */
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78, 156, 234, 312, 468, 624, 702, 780,
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/* MCS 24 - 4 stream */
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104, 208, 312, 416, 624, 832, 936, 1040,
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/* MCS 32 - 1 stream */
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12, /* only valid for 40Mhz - 11a/g DUP mode */
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/* MCS 33 - 2 stream */
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156, 208, 260, 234, 312, 390,
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/* MCS 39 - 3 stream */
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208, 260, 260, 312, 364, 364, 416, 312, 390, 390, 468, 546, 546, 624,
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/* MCS 53 - 4 stream */
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260, 312, 364, 312, 364, 416, 468, 416, 468, 520, 520, 572,
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390, 468, 546, 468, 546, 624, 702, 624, 702, 780, 780, 858
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};
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/*
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* Calculates data rate corresponding to a given 802.11n MCS index,
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* bandwidth, and guard interval.
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*/
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float ieee80211_htrate(int mcs_index, gboolean bandwidth, gboolean short_gi)
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{
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return (float)(ieee80211_ht_Dbps[mcs_index] * (bandwidth ? 108 : 52) / 52.0 / (short_gi ? 3.6 : 4.0));
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}
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static const guint8 ieee80211_ht_streams[MAX_MCS_INDEX+1] = {
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1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,
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1,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,
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4,4,4,4,4,4,4,4,4,4,4,4,4
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};
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static const guint8 ieee80211_ht_Nes[MAX_MCS_INDEX+1] = {
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1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
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1,1,1,1,1,2,2,2, 1,1,1,1,2,2,2,2,
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1,
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1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2
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};
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#define MAX_MCS_VHT_INDEX 9
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/*
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* Maps a VHT bandwidth index to ieee80211_vhtinfo.rates index.
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*/
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static const int ieee80211_vht_bw2rate_index[] = {
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/* 20Mhz total */ 0,
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/* 40Mhz total */ 1, 0, 0,
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/* 80Mhz total */ 2, 1, 1, 0, 0, 0, 0,
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/* 160Mhz total */ 3, 2, 2, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0
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};
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struct mcs_vht_info {
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const char *modulation;
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const char *coding_rate;
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float data_bits_per_symbol; /* assuming 20MHz / 52 subcarriers */
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};
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static const struct mcs_vht_info ieee80211_vhtinfo[MAX_MCS_VHT_INDEX+1] = {
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/* MCS 0 */
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{ "BPSK", "1/2", 26 },
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/* MCS 1 */
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{ "QPSK", "1/2", 52 },
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/* MCS 2 */
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{ "QPSK", "3/4", 78 },
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/* MCS 3 */
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{ "16-QAM", "1/2", 104 },
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/* MCS 4 */
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{ "16-QAM", "3/4", 156 },
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/* MCS 5 */
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{ "64-QAM", "2/3", 208 },
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/* MCS 6 */
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{ "64-QAM", "3/4", 234 },
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/* MCS 7 */
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{ "64-QAM", "5/6", 260 },
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/* MCS 8 */
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{ "256-QAM", "3/4", 312 },
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/* MCS 9 */
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{ "256-QAM", "5/6", (float)(1040/3.0) }
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};
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/* map a bandwidth index to the number of data subcarriers */
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static const guint subcarriers[4] = { 52, 108, 234, 468 };
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#define MAX_VHT_NSS 8
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struct mcs_vht_valid {
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gboolean valid[4][MAX_VHT_NSS]; /* indexed by bandwidth and NSS-1 */
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};
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static const struct mcs_vht_valid ieee80211_vhtvalid[MAX_MCS_VHT_INDEX+1] = {
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/* MCS 0 */
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{
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{ /* 20 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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},
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/* MCS 1 */
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{
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{ /* 20 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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},
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/* MCS 2 */
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{
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{ /* 20 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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},
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/* MCS 3 */
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{
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{ /* 20 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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},
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/* MCS 4 */
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{
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{ /* 20 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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},
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/* MCS 5 */
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{
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{ /* 20 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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},
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/* MCS 6 */
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{
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{ /* 20 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, FALSE, TRUE, TRUE, TRUE, FALSE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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},
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/* MCS 7 */
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{
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{ /* 20 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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},
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/* MCS 8 */
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{
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{ /* 20 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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},
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/* MCS 9 */
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{
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{ /* 20 Mhz */ { FALSE, FALSE, TRUE, FALSE, FALSE, TRUE, FALSE, FALSE },
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/* 40 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE },
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/* 80 Mhz */ { TRUE, TRUE, TRUE, TRUE, TRUE, FALSE, TRUE, TRUE },
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/* 160 Mhz */ { TRUE, TRUE, FALSE, TRUE, TRUE, TRUE, TRUE, TRUE },
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}
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}
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};
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/*
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* Calculates data rate corresponding to a given 802.11ac MCS index,
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* bandwidth, and guard interval.
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*/
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static float ieee80211_vhtrate(int mcs_index, guint bandwidth_index, gboolean short_gi)
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{
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return (float)(ieee80211_vhtinfo[mcs_index].data_bits_per_symbol * subcarriers[bandwidth_index] / (short_gi ? 3.6 : 4.0) / 52.0);
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}
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static gint ett_wlan_radio = -1;
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static gint ett_wlan_radio_11ac_user = -1;
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static gint ett_wlan_radio_duration = -1;
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static gint ett_wlan_radio_aggregate = -1;
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/* previous frame details, for aggregate detection */
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struct previous_frame_info {
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gboolean has_tsf_timestamp;
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guint64 tsf_timestamp;
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guint phy;
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union ieee_802_11_phy_info phy_info;
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guint prev_length;
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struct wlan_radio *radio_info;
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};
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|
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static struct previous_frame_info previous_frame;
|
|
static struct aggregate *current_aggregate;
|
|
static wmem_list_t *agg_tracker_list;
|
|
|
|
static guint calculate_11n_duration(guint frame_length,
|
|
struct ieee_802_11n* info_n,
|
|
int stbc_streams)
|
|
{
|
|
guint bits;
|
|
guint bits_per_symbol;
|
|
guint Mstbc;
|
|
guint symbols;
|
|
|
|
/* data field calculation */
|
|
if (1) {
|
|
/* see ieee80211n-2009 20.3.11 (20-32) - for BCC FEC */
|
|
bits = 8 * frame_length + 16 + ieee80211_ht_Nes[info_n->mcs_index] * 6;
|
|
Mstbc = stbc_streams ? 2 : 1;
|
|
bits_per_symbol = ieee80211_ht_Dbps[info_n->mcs_index] *
|
|
(info_n->bandwidth == PHDR_802_11_BANDWIDTH_40_MHZ ? 2 : 1);
|
|
symbols = bits / (bits_per_symbol * Mstbc);
|
|
} else {
|
|
/* TODO: handle LDPC FEC, it changes the rounding */
|
|
}
|
|
/* round up to whole symbols */
|
|
if ((bits % (bits_per_symbol * Mstbc)) > 0)
|
|
symbols++;
|
|
|
|
symbols *= Mstbc;
|
|
return (symbols * (info_n->short_gi ? 36 : 40) + 5) / 10;
|
|
}
|
|
|
|
/* TODO: this is a crude quick hack, need proper calculation of bits/symbols/FEC/etc */
|
|
static guint calculate_11ac_duration(guint frame_length, float data_rate)
|
|
{
|
|
guint bits = 8 * frame_length + 16;
|
|
return (guint) (bits / data_rate);
|
|
}
|
|
|
|
static void adjust_agg_tsf(gpointer data, gpointer user_data)
|
|
{
|
|
struct wlan_radio *wlan_radio_info = (struct wlan_radio *)data;
|
|
guint64 *ppdu_start = (guint64 *)user_data;
|
|
|
|
wlan_radio_info->start_tsf += (*ppdu_start);
|
|
wlan_radio_info->end_tsf += (*ppdu_start);
|
|
if (wlan_radio_info->prior_aggregate_data == 0)
|
|
wlan_radio_info->ifs += (*ppdu_start);
|
|
}
|
|
|
|
/*
|
|
* Dissect 802.11 pseudo-header containing radio information.
|
|
*/
|
|
static void
|
|
dissect_wlan_radio_phdr (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void *data)
|
|
{
|
|
struct ieee_802_11_phdr *phdr = (struct ieee_802_11_phdr *)data;
|
|
proto_item *ti;
|
|
proto_tree *radio_tree;
|
|
float data_rate = 0.0f;
|
|
gboolean have_data_rate = FALSE;
|
|
gboolean has_short_preamble = FALSE;
|
|
gboolean short_preamble = TRUE;
|
|
guint bandwidth = 0;
|
|
gboolean can_calculate_rate = FALSE;
|
|
proto_item *p_item;
|
|
|
|
guint frame_length = tvb_reported_length(tvb); /* length of 802.11 frame data */
|
|
|
|
/* durations in microseconds */
|
|
guint preamble = 0, agg_preamble = 0; /* duration of plcp */
|
|
gboolean have_duration = FALSE;
|
|
guint duration = 0; /* duration of whole frame (plcp + mac data + any trailing parts) */
|
|
guint prior_duration = 0; /* duration of previous part of aggregate */
|
|
|
|
struct wlan_radio *wlan_radio_info;
|
|
int phy = phdr->phy;
|
|
union ieee_802_11_phy_info *phy_info = &phdr->phy_info;
|
|
|
|
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 (phdr->has_data_rate) {
|
|
data_rate = phdr->data_rate * 0.5f;
|
|
have_data_rate = TRUE;
|
|
}
|
|
|
|
if (phdr->has_signal_dbm) {
|
|
col_add_fstr(pinfo->cinfo, COL_RSSI, "%d dBm", phdr->signal_dbm);
|
|
} else if (phdr->has_signal_percent) {
|
|
col_add_fstr(pinfo->cinfo, COL_RSSI, "%u%%", phdr->signal_percent);
|
|
}
|
|
|
|
/* this is the first time we are looking at this frame during a
|
|
* capture dissection, so we know the dissection is done in
|
|
* frame order (subsequent dissections may be random access) */
|
|
if (!pinfo->fd->flags.visited) {
|
|
wlan_radio_info = wmem_new0(wmem_file_scope(), struct wlan_radio);
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_wlan_radio, 0, wlan_radio_info);
|
|
|
|
/* A-MPDU / aggregate detection
|
|
* Different generators need different detection algorithms
|
|
* One common pattern is to report all subframes in the aggregate with the same
|
|
* tsf, referenced to the start of the AMPDU (Broadcom). Another pattern is to
|
|
* report the tsf on the first subframe, then tsf=0 for the rest of the subframes
|
|
* (Intel).
|
|
* Another pattern is to report TSF = -1 for all frames but the last, and the
|
|
* last has the tsf referenced to the end of the PPDU. (QCA)
|
|
*/
|
|
/* TODO: add code to work around problem with captures from Macbooks where
|
|
* aggregate subframes frames with FCS errors sometimes have incorrect
|
|
* PHY information.
|
|
*/
|
|
if (pinfo->fd->num > 1 &&
|
|
(phdr->phy == PHDR_802_11_PHY_11N || phdr->phy == PHDR_802_11_PHY_11AC) &&
|
|
phdr->phy == previous_frame.phy &&
|
|
phdr->has_tsf_timestamp && previous_frame.has_tsf_timestamp &&
|
|
(phdr->tsf_timestamp == previous_frame.tsf_timestamp || /* find matching TSFs */
|
|
(!current_aggregate && previous_frame.tsf_timestamp && phdr->tsf_timestamp == 0) || /* Intel detect second frame */
|
|
(previous_frame.tsf_timestamp == G_MAXUINT64) /* QCA, detect last frame */
|
|
)) {
|
|
/* we're in an aggregate */
|
|
if (!current_aggregate) {
|
|
/* this is the second frame in an aggregate
|
|
* where we first detect the aggregate */
|
|
current_aggregate = wmem_new0(wmem_file_scope(), struct aggregate);
|
|
current_aggregate->phy = previous_frame.phy;
|
|
current_aggregate->phy_info = previous_frame.phy_info;
|
|
|
|
/* go back to the first frame in the aggregate,
|
|
* and mark it as part of this aggregate */
|
|
if (previous_frame.radio_info != NULL)
|
|
previous_frame.radio_info->aggregate = current_aggregate;
|
|
}
|
|
wlan_radio_info->aggregate = current_aggregate;
|
|
|
|
/* accumulate the length of the prior subframes in the aggregate.
|
|
* Round up previous frame length (padding) */
|
|
if (previous_frame.prev_length % 4 != 0) {
|
|
previous_frame.prev_length = (previous_frame.prev_length | 3) + 1;
|
|
}
|
|
/* Also add the MPDU delimiter length */
|
|
previous_frame.prev_length += 4;
|
|
/* TODO: add padding to meet minimum subframe timing constraint */
|
|
wlan_radio_info->prior_aggregate_data = previous_frame.prev_length;
|
|
previous_frame.prev_length += frame_length;
|
|
|
|
/* work around macbook/QCA FCS error frame PHY rate bug here
|
|
* Some Macbook generators and some QCA generators erroneously report
|
|
* low PHY rates for some subframes within an aggregate that have FCS errors.
|
|
* All subframes must have the same PHY rate.
|
|
* Here we take the highest reported rate for the aggregate. */
|
|
switch (phdr->phy) {
|
|
case PHDR_802_11_PHY_11N:
|
|
{
|
|
struct ieee_802_11n *info_n = &phy_info->info_11n;
|
|
struct ieee_802_11n *agg_info_n = ¤t_aggregate->phy_info.info_11n;
|
|
|
|
if (info_n->has_mcs_index && agg_info_n->has_mcs_index &&
|
|
info_n->mcs_index > agg_info_n->mcs_index)
|
|
current_aggregate->phy_info = *phy_info;
|
|
}
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11AC:
|
|
{
|
|
struct ieee_802_11ac *info_ac = &phy_info->info_11ac;
|
|
struct ieee_802_11ac *agg_info_ac = ¤t_aggregate->phy_info.info_11ac;
|
|
|
|
if (info_ac->mcs[0] > agg_info_ac->mcs[0])
|
|
current_aggregate->phy_info = *phy_info;
|
|
}
|
|
break;
|
|
}
|
|
/* TODO record a warning if the PHY rate does not match the aggregate */
|
|
phy = current_aggregate->phy;
|
|
phy_info = ¤t_aggregate->phy_info;
|
|
} else {
|
|
current_aggregate = NULL;
|
|
previous_frame.prev_length = frame_length;
|
|
}
|
|
previous_frame.has_tsf_timestamp = phdr->has_tsf_timestamp;
|
|
previous_frame.tsf_timestamp = phdr->tsf_timestamp;
|
|
previous_frame.phy = phdr->phy;
|
|
previous_frame.phy_info = phdr->phy_info;
|
|
} else {
|
|
/* this frame has already been seen, so get its info structure */
|
|
wlan_radio_info = (struct wlan_radio *) p_get_proto_data(wmem_file_scope(), pinfo, proto_wlan_radio, 0);
|
|
|
|
if (wlan_radio_info->aggregate) {
|
|
phy = wlan_radio_info->aggregate->phy;
|
|
phy_info = &wlan_radio_info->aggregate->phy_info;
|
|
}
|
|
}
|
|
|
|
ti = proto_tree_add_item(tree, proto_wlan_radio, tvb, 0, 0, ENC_NA);
|
|
radio_tree = proto_item_add_subtree (ti, ett_wlan_radio);
|
|
|
|
if (phy != PHDR_802_11_PHY_UNKNOWN) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_phy, tvb, 0, 0, phy);
|
|
|
|
switch (phy) {
|
|
|
|
case PHDR_802_11_PHY_11_FHSS:
|
|
{
|
|
struct ieee_802_11_fhss *info_fhss = &phy_info->info_11_fhss;
|
|
|
|
if (info_fhss->has_hop_set) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11_fhss_hop_set, tvb, 0, 0,
|
|
info_fhss->hop_set);
|
|
}
|
|
if (info_fhss->has_hop_pattern) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11_fhss_hop_pattern, tvb, 0, 0,
|
|
info_fhss->hop_pattern);
|
|
}
|
|
if (info_fhss->has_hop_index) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11_fhss_hop_index, tvb, 0, 0,
|
|
info_fhss->hop_index);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PHDR_802_11_PHY_11B:
|
|
{
|
|
struct ieee_802_11b *info_b = &phy_info->info_11b;
|
|
|
|
has_short_preamble = info_b->has_short_preamble;
|
|
short_preamble = info_b->short_preamble;
|
|
|
|
if (has_short_preamble) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_short_preamble, tvb, 0, 0,
|
|
short_preamble);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PHDR_802_11_PHY_11A:
|
|
{
|
|
struct ieee_802_11a *info_a = &phy_info->info_11a;
|
|
|
|
if (info_a->has_channel_type) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11a_channel_type, tvb, 0, 0,
|
|
info_a->channel_type);
|
|
}
|
|
if (info_a->has_turbo_type) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11a_turbo_type, tvb, 0, 0,
|
|
info_a->turbo_type);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PHDR_802_11_PHY_11G:
|
|
{
|
|
struct ieee_802_11g *info_g = &phy_info->info_11g;
|
|
|
|
has_short_preamble = info_g->has_short_preamble;
|
|
short_preamble = info_g->short_preamble;
|
|
|
|
if (has_short_preamble) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_short_preamble, tvb, 0, 0,
|
|
short_preamble);
|
|
}
|
|
if (info_g->has_mode) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11g_mode, tvb, 0, 0,
|
|
info_g->mode);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PHDR_802_11_PHY_11N:
|
|
{
|
|
struct ieee_802_11n *info_n = &phy_info->info_11n;
|
|
guint bandwidth_40;
|
|
|
|
/*
|
|
* If we have all the fields needed to look up the data rate,
|
|
* do so.
|
|
*/
|
|
if (info_n->has_mcs_index &&
|
|
info_n->has_bandwidth &&
|
|
info_n->has_short_gi) {
|
|
bandwidth_40 = (info_n->bandwidth == PHDR_802_11_BANDWIDTH_40_MHZ) ? 1 : 0;
|
|
if (info_n->mcs_index < MAX_MCS_INDEX) {
|
|
data_rate = ieee80211_htrate(info_n->mcs_index, bandwidth_40, info_n->short_gi);
|
|
have_data_rate = TRUE;
|
|
}
|
|
}
|
|
|
|
if (info_n->has_mcs_index) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_mcs_index, tvb, 0, 0,
|
|
info_n->mcs_index);
|
|
}
|
|
|
|
if (info_n->has_bandwidth) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_bandwidth, tvb, 0, 0,
|
|
info_n->bandwidth);
|
|
}
|
|
|
|
if (info_n->has_short_gi) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_11n_short_gi, tvb, 0, 0,
|
|
info_n->short_gi);
|
|
}
|
|
|
|
if (info_n->has_greenfield) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_11n_greenfield, tvb, 0, 0,
|
|
info_n->greenfield);
|
|
}
|
|
|
|
if (info_n->has_fec) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_fec, tvb, 0, 0,
|
|
info_n->fec);
|
|
}
|
|
|
|
if (info_n->has_stbc_streams) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_stbc_streams, tvb, 0, 0,
|
|
info_n->stbc_streams);
|
|
}
|
|
|
|
if (info_n->has_ness) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11n_ness, tvb, 0, 0,
|
|
info_n->ness);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11AC:
|
|
{
|
|
struct ieee_802_11ac *info_ac = &phy_info->info_11ac;
|
|
guint i;
|
|
|
|
if (info_ac->has_short_gi) {
|
|
can_calculate_rate = TRUE; /* well, if we also have the bandwidth */
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_short_gi, tvb, 0, 0, info_ac->short_gi);
|
|
} else {
|
|
can_calculate_rate = FALSE; /* unknown GI length */
|
|
}
|
|
|
|
if (info_ac->has_bandwidth) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11ac_bandwidth, tvb, 0, 0, info_ac->bandwidth);
|
|
if (info_ac->bandwidth < G_N_ELEMENTS(ieee80211_vht_bw2rate_index))
|
|
bandwidth = ieee80211_vht_bw2rate_index[info_ac->bandwidth];
|
|
else
|
|
can_calculate_rate = FALSE; /* unknown bandwidth */
|
|
} else {
|
|
can_calculate_rate = FALSE; /* no bandwidth */
|
|
}
|
|
|
|
if (info_ac->has_stbc) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_stbc, tvb, 0, 0,
|
|
info_ac->stbc);
|
|
}
|
|
|
|
if (info_ac->has_txop_ps_not_allowed) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_txop_ps_not_allowed, tvb, 0, 0,
|
|
info_ac->txop_ps_not_allowed);
|
|
}
|
|
|
|
if (info_ac->has_short_gi_nsym_disambig) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_short_gi_nsym_disambig, tvb, 0, 0,
|
|
info_ac->short_gi_nsym_disambig);
|
|
}
|
|
|
|
if (info_ac->has_ldpc_extra_ofdm_symbol) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_ldpc_extra_ofdm_symbol, tvb, 0, 0,
|
|
info_ac->ldpc_extra_ofdm_symbol);
|
|
}
|
|
|
|
if (info_ac->has_beamformed) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_radio_11ac_beamformed, tvb, 0, 0,
|
|
info_ac->beamformed);
|
|
}
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
|
|
if (info_ac->nss[i] != 0) {
|
|
proto_item *it;
|
|
proto_tree *user_tree;
|
|
|
|
it = proto_tree_add_item(radio_tree, hf_wlan_radio_11ac_user, tvb, 0, 0, ENC_NA);
|
|
proto_item_append_text(it, " %d: MCS %u", i, info_ac->mcs[i]);
|
|
user_tree = proto_item_add_subtree(it, ett_wlan_radio_11ac_user);
|
|
|
|
it = proto_tree_add_uint(user_tree, hf_wlan_radio_11ac_mcs, tvb, 0, 0,
|
|
info_ac->mcs[i]);
|
|
if (info_ac->mcs[i] > MAX_MCS_VHT_INDEX) {
|
|
proto_item_append_text(it, " (invalid)");
|
|
} else {
|
|
proto_item_append_text(it, " (%s %s)",
|
|
ieee80211_vhtinfo[info_ac->mcs[i]].modulation,
|
|
ieee80211_vhtinfo[info_ac->mcs[i]].coding_rate);
|
|
|
|
/*
|
|
* If we can calculate the data rate for this user, do so.
|
|
*/
|
|
if (can_calculate_rate) {
|
|
data_rate = ieee80211_vhtrate(info_ac->mcs[i], bandwidth, info_ac->short_gi) * info_ac->nss[i];
|
|
have_data_rate = TRUE;
|
|
}
|
|
}
|
|
|
|
proto_tree_add_uint(user_tree, hf_wlan_radio_11ac_nss, tvb, 0, 0, info_ac->nss[i]);
|
|
/*
|
|
* If we don't know whether space-time block coding is being
|
|
* used, we don't know the number of space-time streams.
|
|
*/
|
|
if (info_ac->has_stbc) {
|
|
guint nsts;
|
|
|
|
if (info_ac->stbc)
|
|
nsts = 2 * info_ac->nss[i];
|
|
else
|
|
nsts = info_ac->nss[i];
|
|
proto_tree_add_uint(user_tree, hf_wlan_radio_11ac_nsts, tvb, 0, 0,
|
|
nsts);
|
|
}
|
|
if (info_ac->has_fec) {
|
|
proto_tree_add_uint(user_tree, hf_wlan_radio_11ac_fec, tvb, 0, 0,
|
|
(info_ac->fec >> i) & 0x01);
|
|
}
|
|
|
|
/*
|
|
* If we can calculate the data rate for this user, do so.
|
|
*/
|
|
if (can_calculate_rate && info_ac->mcs[i] <= MAX_MCS_VHT_INDEX &&
|
|
info_ac->nss[i] <= MAX_VHT_NSS &&
|
|
ieee80211_vhtvalid[info_ac->mcs[i]].valid[bandwidth][info_ac->nss[i]-1]) {
|
|
data_rate = ieee80211_vhtrate(info_ac->mcs[i], bandwidth, info_ac->short_gi) * info_ac->nss[i];
|
|
if (data_rate != 0.0f) {
|
|
proto_tree_add_float_format_value(user_tree, hf_wlan_radio_data_rate, tvb, 0, 0,
|
|
data_rate,
|
|
"%.1f Mb/s",
|
|
data_rate);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (info_ac->has_group_id) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11ac_gid, tvb, 0, 0, info_ac->group_id);
|
|
}
|
|
|
|
if (info_ac->has_partial_aid) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_11ac_p_aid, tvb, 0, 0, info_ac->partial_aid);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (have_data_rate) {
|
|
col_add_fstr(pinfo->cinfo, COL_TX_RATE, "%.1f", data_rate);
|
|
proto_tree_add_float_format_value(radio_tree, hf_wlan_radio_data_rate, tvb, 0, 0,
|
|
data_rate,
|
|
"%.1f Mb/s",
|
|
data_rate);
|
|
}
|
|
|
|
if (phdr->has_channel) {
|
|
col_add_fstr(pinfo->cinfo, COL_FREQ_CHAN, "%u", phdr->channel);
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_channel, tvb, 0, 0, phdr->channel);
|
|
}
|
|
|
|
if (phdr->has_frequency) {
|
|
col_add_fstr(pinfo->cinfo, COL_FREQ_CHAN, "%u MHz", phdr->frequency);
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_frequency, tvb, 0, 0, phdr->frequency);
|
|
}
|
|
|
|
if (phdr->has_signal_percent) {
|
|
col_add_fstr(pinfo->cinfo, COL_RSSI, "%u%%", phdr->signal_percent);
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_signal_percent, tvb, 0, 0, phdr->signal_percent);
|
|
}
|
|
|
|
if (phdr->has_signal_dbm) {
|
|
col_add_fstr(pinfo->cinfo, COL_RSSI, "%d dBm", phdr->signal_dbm);
|
|
proto_tree_add_int(radio_tree, hf_wlan_radio_signal_dbm, tvb, 0, 0, phdr->signal_dbm);
|
|
}
|
|
|
|
if (phdr->has_noise_percent) {
|
|
proto_tree_add_uint(radio_tree, hf_wlan_radio_noise_percent, tvb, 0, 0, phdr->noise_percent);
|
|
}
|
|
|
|
if (phdr->has_noise_dbm) {
|
|
proto_tree_add_int(radio_tree, hf_wlan_radio_noise_dbm, tvb, 0, 0, phdr->noise_dbm);
|
|
}
|
|
|
|
if (phdr->has_tsf_timestamp) {
|
|
proto_tree_add_uint64(radio_tree, hf_wlan_radio_timestamp, tvb, 0, 0, phdr->tsf_timestamp);
|
|
}
|
|
if (phdr->has_aggregate_info) {
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_last_part_of_a_mpdu, tvb, 0, 0, phdr->aggregate_flags);
|
|
proto_tree_add_boolean(radio_tree, hf_wlan_a_mpdu_delim_crc_error, tvb, 0, 0, phdr->aggregate_flags);
|
|
proto_tree_add_uint(radio_tree, hf_wlan_a_mpdu_aggregate_id, tvb, 0, 0, phdr->aggregate_id);
|
|
}
|
|
|
|
/* make sure frame_length includes the FCS for accurate duration calculation */
|
|
if (pinfo->pseudo_header->ieee_802_11.fcs_len == 0) {
|
|
frame_length += 4;
|
|
}
|
|
|
|
if (have_data_rate && data_rate > 0) {
|
|
/* duration calculations */
|
|
gboolean assumed_short_preamble = FALSE;
|
|
gboolean assumed_non_greenfield = FALSE;
|
|
gboolean assumed_no_stbc = FALSE;
|
|
gboolean assumed_no_extension_streams = FALSE;
|
|
gboolean assumed_bcc_fec = FALSE;
|
|
|
|
/* some generators report CCK frames as 'dynamic-cck-ofdm', which are converted
|
|
* into the 11g PHY type, so we need to be smart and recognize which ones are
|
|
* DSSS/CCK and which are OFDM. Use the data_rate to do this. */
|
|
if (phy == PHDR_802_11_PHY_11G &&
|
|
(data_rate == 1.0f || data_rate == 2.0f ||
|
|
data_rate == 5.5f || data_rate == 11.0f ||
|
|
data_rate == 22.0f || data_rate == 33.0f)) {
|
|
phy = PHDR_802_11_PHY_11B;
|
|
} else if (phy == PHDR_802_11_PHY_UNKNOWN &&
|
|
(data_rate == 1.0f || data_rate == 2.0f ||
|
|
data_rate == 5.5f || data_rate == 11.0f ||
|
|
data_rate == 22.0f || data_rate == 33.0f)) {
|
|
phy = PHDR_802_11_PHY_11B;
|
|
} else if (phy == PHDR_802_11_PHY_UNKNOWN &&
|
|
(data_rate == 6.0f || data_rate == 9.0f ||
|
|
data_rate == 12.0f || data_rate == 18.0f ||
|
|
data_rate == 24.0f || data_rate == 36.0f ||
|
|
data_rate == 48.0f || data_rate == 54.0f)) {
|
|
phy = PHDR_802_11_PHY_11A;
|
|
}
|
|
switch (phy) {
|
|
|
|
case PHDR_802_11_PHY_11_FHSS:
|
|
/* TODO: preamble/duration calc for FHSS */
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11B:
|
|
if (!has_short_preamble || wlan_radio_always_short_preamble) {
|
|
assumed_short_preamble = TRUE;
|
|
short_preamble = TRUE;
|
|
}
|
|
preamble = short_preamble ? 72 + 24 : 144 + 48;
|
|
|
|
/* calculation of frame duration
|
|
* Things we need to know to calculate accurate duration
|
|
* 802.11 / 802.11b (DSSS or CCK modulation)
|
|
* - length of preamble
|
|
* - rate
|
|
*/
|
|
/* round up to whole microseconds */
|
|
have_duration = TRUE;
|
|
duration = (guint) ceil(preamble + frame_length * 8 / data_rate);
|
|
break;
|
|
|
|
case PHDR_802_11_PHY_11A:
|
|
case PHDR_802_11_PHY_11G:
|
|
{
|
|
/* OFDM rate */
|
|
/* calculation of frame duration
|
|
* Things we need to know to calculate accurate duration
|
|
* 802.11a / 802.11g (OFDM modulation)
|
|
* - rate
|
|
*/
|
|
|
|
/* preamble + signal */
|
|
preamble = 16 + 4;
|
|
|
|
/* 16 service bits, data and 6 tail bits */
|
|
guint bits = 16 + 8 * frame_length + 6;
|
|
guint symbols = (guint) ceil(bits / (data_rate * 4));
|
|
|
|
have_duration = TRUE;
|
|
duration = preamble + symbols * 4;
|
|
break;
|
|
}
|
|
|
|
case PHDR_802_11_PHY_11N:
|
|
{
|
|
struct ieee_802_11n *info_n = &phy_info->info_11n;
|
|
|
|
/* We have all the fields required to calculate the duration */
|
|
static const guint Nhtdltf[4] = {1, 2, 4, 4};
|
|
static const guint Nhteltf[4] = {0, 1, 2, 4};
|
|
guint Nsts;
|
|
guint stbc_streams;
|
|
guint ness;
|
|
|
|
/*
|
|
* If we don't have necessary fields, or if we have them but
|
|
* they have invalid values, then bail.
|
|
*/
|
|
if (!info_n->has_mcs_index ||
|
|
info_n->mcs_index > MAX_MCS_INDEX ||
|
|
!info_n->has_bandwidth ||
|
|
!info_n->has_short_gi)
|
|
break;
|
|
|
|
/* calculation of frame duration
|
|
* Things we need to know to calculate accurate duration
|
|
* 802.11n / HT
|
|
* - whether frame preamble is mixed or greenfield, (assume mixed)
|
|
* - guard interval, 800ns or 400ns
|
|
* - bandwidth, 20Mhz or 40Mhz
|
|
* - MCS index - used with previous 2 to calculate rate
|
|
* - how many additional STBC streams are used (assume 0)
|
|
* - how many optional extension spatial streams are used (assume 0)
|
|
* - whether BCC or LDCP coding is used (assume BCC)
|
|
*/
|
|
|
|
/* preamble duration
|
|
* see ieee802.11n-2009 Figure 20-1 - PPDU format
|
|
* for HT-mixed format
|
|
* L-STF 8us, L-LTF 8us, L-SIG 4us, HT-SIG 8us, HT_STF 4us
|
|
* for HT-greenfield
|
|
* HT-GF-STF 8us, HT-LTF1 8us, HT_SIG 8us
|
|
*/
|
|
if (info_n->has_greenfield) {
|
|
preamble = info_n->greenfield ? 24 : 32;
|
|
} else {
|
|
preamble = 32;
|
|
assumed_non_greenfield = TRUE;
|
|
}
|
|
|
|
if (info_n->has_stbc_streams) {
|
|
stbc_streams = info_n->stbc_streams;
|
|
} else {
|
|
stbc_streams = 0;
|
|
assumed_no_stbc = TRUE;
|
|
}
|
|
|
|
if (info_n->has_ness) {
|
|
ness = info_n->ness;
|
|
if (ness >= G_N_ELEMENTS(Nhteltf)) {
|
|
/* Not valid */
|
|
break;
|
|
}
|
|
} else {
|
|
ness = 0;
|
|
assumed_no_extension_streams = TRUE;
|
|
}
|
|
|
|
/* calculate number of HT-LTF training symbols.
|
|
* see ieee80211n-2009 20.3.9.4.6 table 20-11 */
|
|
Nsts = ieee80211_ht_streams[info_n->mcs_index] + stbc_streams;
|
|
if (Nsts == 0 || Nsts - 1 >= G_N_ELEMENTS(Nhtdltf)) {
|
|
/* Not usable */
|
|
break;
|
|
}
|
|
preamble += 4 * (Nhtdltf[Nsts-1] + Nhteltf[ness]);
|
|
|
|
if (info_n->has_stbc_streams) {
|
|
stbc_streams = info_n->stbc_streams;
|
|
} else {
|
|
stbc_streams = 0;
|
|
assumed_no_stbc = TRUE;
|
|
}
|
|
|
|
if (!info_n->has_ness) {
|
|
assumed_no_extension_streams = TRUE;
|
|
}
|
|
|
|
if (!info_n->has_fec) {
|
|
assumed_bcc_fec = TRUE;
|
|
}
|
|
|
|
/* data field calculation */
|
|
if (wlan_radio_info->aggregate) {
|
|
agg_preamble = preamble;
|
|
if (wlan_radio_info->prior_aggregate_data != 0) {
|
|
preamble = 0;
|
|
}
|
|
prior_duration = calculate_11n_duration(wlan_radio_info->prior_aggregate_data, info_n, stbc_streams);
|
|
have_duration = TRUE;
|
|
duration = preamble +
|
|
calculate_11n_duration(frame_length + wlan_radio_info->prior_aggregate_data, info_n, stbc_streams)
|
|
- prior_duration;
|
|
} else {
|
|
have_duration = TRUE;
|
|
duration = preamble + calculate_11n_duration(frame_length, info_n, stbc_streams);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PHDR_802_11_PHY_11AC:
|
|
{
|
|
struct ieee_802_11ac *info_ac = &phy_info->info_11ac;
|
|
|
|
if (!info_ac->has_stbc) {
|
|
assumed_no_stbc = TRUE;
|
|
}
|
|
preamble = 32 + 4 * info_ac->nss[0] * (info_ac->has_stbc ? info_ac->stbc+1 : 1);
|
|
|
|
if (wlan_radio_info->aggregate) {
|
|
agg_preamble = preamble;
|
|
if (wlan_radio_info->prior_aggregate_data != 0) {
|
|
preamble = 0;
|
|
}
|
|
prior_duration = calculate_11ac_duration(wlan_radio_info->prior_aggregate_data, data_rate);
|
|
have_duration = TRUE;
|
|
duration = preamble +
|
|
calculate_11ac_duration(wlan_radio_info->prior_aggregate_data + frame_length, data_rate)
|
|
- prior_duration;
|
|
} else {
|
|
have_duration = TRUE;
|
|
duration = preamble + calculate_11ac_duration(frame_length, data_rate);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!pinfo->fd->flags.visited && have_duration && phdr->has_tsf_timestamp) {
|
|
if (current_aggregate) {
|
|
current_aggregate->duration = agg_preamble + prior_duration + duration;
|
|
if (previous_frame.radio_info && previous_frame.radio_info->aggregate == current_aggregate)
|
|
previous_frame.radio_info->nav = 0; // don't display NAV except for last frame in an aggregate
|
|
}
|
|
if (phdr->tsf_timestamp == G_MAXUINT64) {
|
|
/* QCA aggregate, we don't know tsf yet */
|
|
wlan_radio_info->start_tsf = prior_duration + (current_aggregate ? agg_preamble : 0);
|
|
wlan_radio_info->end_tsf = prior_duration + duration + (current_aggregate ? agg_preamble : 0);
|
|
if (agg_tracker_list == NULL) {
|
|
agg_tracker_list = wmem_list_new(NULL);
|
|
}
|
|
wmem_list_append(agg_tracker_list, wlan_radio_info);
|
|
} else if (current_aggregate && wlan_radio_tsf_at_end && phdr->tsf_timestamp != G_MAXUINT64) {
|
|
/* QCA aggregate, last frame */
|
|
wlan_radio_info->start_tsf = phdr->tsf_timestamp - duration;
|
|
wlan_radio_info->end_tsf = phdr->tsf_timestamp;
|
|
/* fix up the tsfs for the prior MPDUs */
|
|
if (agg_tracker_list != NULL) {
|
|
guint64 ppdu_start = phdr->tsf_timestamp - (prior_duration + duration + agg_preamble);
|
|
wmem_list_foreach(agg_tracker_list, adjust_agg_tsf, &ppdu_start);
|
|
wmem_destroy_list(agg_tracker_list);
|
|
agg_tracker_list = NULL;
|
|
};
|
|
} else if (wlan_radio_tsf_at_end) {
|
|
wlan_radio_info->start_tsf = phdr->tsf_timestamp - duration;
|
|
wlan_radio_info->end_tsf = phdr->tsf_timestamp;
|
|
} else {
|
|
wlan_radio_info->start_tsf = phdr->tsf_timestamp + prior_duration - preamble;
|
|
wlan_radio_info->end_tsf = phdr->tsf_timestamp + prior_duration + duration - preamble;
|
|
}
|
|
if ((pinfo->fd->num > 1) && (previous_frame.radio_info != NULL)) {
|
|
/* TODO handle intermediate packets without end_tsf correctly */
|
|
wlan_radio_info->ifs = wlan_radio_info->start_tsf - previous_frame.radio_info->end_tsf;
|
|
}
|
|
if (tvb_captured_length(tvb) >= 4) {
|
|
int nav = tvb_get_letohs(tvb, 2);
|
|
if ((nav & 0x8000) == 0)
|
|
wlan_radio_info->nav = nav;
|
|
}
|
|
if (phdr->has_signal_dbm) {
|
|
wlan_radio_info->rssi = phdr->signal_dbm;
|
|
if (current_aggregate)
|
|
current_aggregate->rssi = phdr->signal_dbm;
|
|
}
|
|
}
|
|
|
|
if (have_duration) {
|
|
proto_item *item = proto_tree_add_uint(radio_tree, hf_wlan_radio_duration, tvb, 0, 0, duration);
|
|
proto_tree *d_tree = proto_item_add_subtree(item, ett_wlan_radio_duration);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
if (assumed_short_preamble)
|
|
expert_add_info(pinfo, item, &ei_wlan_radio_assumed_short_preamble);
|
|
if (assumed_non_greenfield)
|
|
expert_add_info(pinfo, item, &ei_wlan_radio_assumed_non_greenfield);
|
|
if (assumed_no_stbc)
|
|
expert_add_info(pinfo, item, &ei_wlan_radio_assumed_no_stbc);
|
|
if (assumed_no_extension_streams)
|
|
expert_add_info(pinfo, item, &ei_wlan_radio_assumed_no_extension_streams);
|
|
if (assumed_bcc_fec)
|
|
expert_add_info(pinfo, item, &ei_wlan_radio_assumed_bcc_fec);
|
|
|
|
if (preamble) {
|
|
p_item = proto_tree_add_uint(d_tree, hf_wlan_radio_preamble, tvb, 0, 0, preamble);
|
|
PROTO_ITEM_SET_GENERATED(p_item);
|
|
}
|
|
if (wlan_radio_info->aggregate) {
|
|
proto_tree *agg_tree;
|
|
|
|
p_item = proto_tree_add_none_format(d_tree, hf_wlan_radio_aggregate, tvb, 0, 0,
|
|
"This MPDU is part of an A-MPDU");
|
|
agg_tree = proto_item_add_subtree(item, ett_wlan_radio_aggregate);
|
|
PROTO_ITEM_SET_GENERATED(p_item);
|
|
if (wlan_radio_info->aggregate->duration) {
|
|
proto_item *aitem = proto_tree_add_uint(agg_tree, hf_wlan_radio_aggregate_duration, tvb, 0, 0,
|
|
wlan_radio_info->aggregate->duration);
|
|
PROTO_ITEM_SET_GENERATED(aitem);
|
|
}
|
|
}
|
|
if (wlan_radio_info->ifs) {
|
|
p_item = proto_tree_add_int64(d_tree, hf_wlan_radio_ifs, tvb, 0, 0, wlan_radio_info->ifs);
|
|
PROTO_ITEM_SET_GENERATED(p_item);
|
|
/* TODO: warnings on unusual IFS values (too small or negative) */
|
|
}
|
|
if (wlan_radio_info->start_tsf) {
|
|
p_item = proto_tree_add_uint64(d_tree, hf_wlan_radio_start_tsf, tvb, 0, 0, wlan_radio_info->start_tsf);
|
|
PROTO_ITEM_SET_GENERATED(p_item);
|
|
}
|
|
if (wlan_radio_info->end_tsf) {
|
|
p_item = proto_tree_add_uint64(d_tree, hf_wlan_radio_end_tsf, tvb, 0, 0, wlan_radio_info->end_tsf);
|
|
PROTO_ITEM_SET_GENERATED(p_item);
|
|
}
|
|
}
|
|
} /* if (have_data_rate) */
|
|
|
|
if (wlan_radio_timeline_enabled) {
|
|
tap_queue_packet(wlan_radio_timeline_tap, pinfo, wlan_radio_info);
|
|
}
|
|
|
|
if (!pinfo->fd->flags.visited) {
|
|
previous_frame.radio_info = wlan_radio_info;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect 802.11 with a variable-length link-layer header and a pseudo-
|
|
* header containing radio information.
|
|
*/
|
|
static int
|
|
dissect_wlan_radio (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void *data)
|
|
{
|
|
dissect_wlan_radio_phdr (tvb, pinfo, tree, data);
|
|
|
|
/* dissect the 802.11 packet next */
|
|
return call_dissector_with_data(ieee80211_handle, tvb, pinfo, tree, data);
|
|
}
|
|
|
|
/*
|
|
* Dissect 802.11 with a variable-length link-layer header without qos elements and
|
|
* a pseudo-header containing radio information.
|
|
*/
|
|
static int
|
|
dissect_wlan_noqos_radio (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void *data)
|
|
{
|
|
dissect_wlan_radio_phdr (tvb, pinfo, tree, data);
|
|
|
|
/* dissect the 802.11 packet next */
|
|
return call_dissector_with_data(ieee80211_noqos_handle, tvb, pinfo, tree, data);
|
|
}
|
|
|
|
static void
|
|
setup_ieee80211_radio(void)
|
|
{
|
|
/* start of a new dissection, initialize state variables */
|
|
current_aggregate = NULL;
|
|
agg_tracker_list = NULL;
|
|
memset(&previous_frame, 0, sizeof(previous_frame));
|
|
}
|
|
|
|
static void
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cleanup_ieee80211_radio(void)
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{
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if (agg_tracker_list != NULL) {
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wmem_destroy_list(agg_tracker_list);
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agg_tracker_list = NULL;
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}
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}
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void proto_register_ieee80211_radio(void)
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{
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static hf_register_info hf_wlan_radio[] = {
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{&hf_wlan_radio_phy,
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{"PHY type", "wlan_radio.phy", FT_UINT32, BASE_DEC, VALS(phy_vals), 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11_fhss_hop_set,
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{"Hop set", "wlan_radio.fhss.hop_set", FT_UINT8, BASE_HEX, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11_fhss_hop_pattern,
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{"Hop pattern", "wlan_radio.fhss.hop_pattern", FT_UINT8, BASE_HEX, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11_fhss_hop_index,
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{"Hop index", "wlan_radio.fhss.hop_index", FT_UINT8, BASE_HEX, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11a_channel_type,
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{"Channel type", "wlan_radio.11a.channel_type", FT_UINT32, BASE_DEC, VALS(channel_type_11a_vals), 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11a_turbo_type,
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{"Turbo type", "wlan_radio.11a.turbo_type", FT_UINT32, BASE_DEC, VALS(turbo_type_11a_vals), 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11g_mode,
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{"Proprietary mode", "wlan_radio.11g.mode", FT_UINT32, BASE_DEC, VALS(mode_11g_vals), 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11n_mcs_index,
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{"MCS index", "wlan_radio.11n.mcs_index", FT_UINT32, BASE_DEC, NULL, 0,
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"Modulation and Coding Scheme index", HFILL }},
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{&hf_wlan_radio_11n_bandwidth,
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{"Bandwidth", "wlan_radio.11n.bandwidth", FT_UINT32, BASE_DEC, VALS(bandwidth_vals), 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11n_short_gi,
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{"Short GI", "wlan_radio.11n.short_gi", FT_BOOLEAN, 0, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11n_greenfield,
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{"Greenfield", "wlan_radio.11n.greenfield", FT_BOOLEAN, BASE_NONE, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11n_fec,
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{"FEC", "wlan_radio.11n.fec", FT_UINT32, BASE_DEC, VALS(fec_vals), 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11n_stbc_streams,
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{"Number of STBC streams", "wlan_radio.11n.stbc_streams", FT_UINT32, BASE_DEC, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11n_ness,
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{"Number of extension spatial streams", "wlan_radio.11n.ness", FT_UINT32, BASE_DEC, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11ac_stbc,
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{"STBC", "wlan_radio.11ac.stbc", FT_BOOLEAN, 0, TFS(&tfs_on_off), 0x0,
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"Space Time Block Coding flag", HFILL }},
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{&hf_wlan_radio_11ac_txop_ps_not_allowed,
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{"TXOP_PS_NOT_ALLOWED", "wlan_radio_11ac.txop_ps_not_allowed", FT_BOOLEAN, 0, NULL, 0x0,
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"Flag indicating whether STAs may doze during TXOP", HFILL }},
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{&hf_wlan_radio_11ac_short_gi,
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{"Short GI", "wlan_radio.11ac.short_gi", FT_BOOLEAN, 0, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11ac_short_gi_nsym_disambig,
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{"Short GI Nsym disambiguation", "wlan_radio.11ac.short_gi_nsym_disambig", FT_BOOLEAN, 0, NULL, 0x0,
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"Short Guard Interval Nsym disambiguation", HFILL }},
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{&hf_wlan_radio_11ac_ldpc_extra_ofdm_symbol,
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{"LDPC extra OFDM symbol", "wlan_radio.11ac.ldpc_extra_ofdm_symbol", FT_BOOLEAN, 0, NULL, 0x0,
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NULL, HFILL }},
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{&hf_wlan_radio_11ac_beamformed,
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{"Beamformed", "wlan_radio.11ac.beamformed", FT_BOOLEAN, 0, NULL, 0x0,
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NULL, HFILL }},
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{&hf_wlan_radio_11ac_bandwidth,
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{"Bandwidth", "wlan_radio.11ac.bandwidth", FT_UINT32, BASE_DEC, VALS(bandwidth_vals), 0,
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NULL, HFILL }},
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{&hf_wlan_radio_11ac_user,
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{"User", "wlan_radio.11ac.user", FT_NONE, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{&hf_wlan_radio_11ac_nsts,
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{"Space-time streams", "wlan_radio.11ac.nsts", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Number of Space-time streams", HFILL }},
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{&hf_wlan_radio_11ac_mcs,
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{"MCS index", "wlan_radio.11ac.mcs", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Modulation and Coding Scheme index", HFILL }},
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{&hf_wlan_radio_11ac_nss,
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{"Spatial streams", "wlan_radio.11ac.nss", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Number of spatial streams", HFILL }},
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{&hf_wlan_radio_11ac_fec,
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{"FEC", "wlan_radio.11ac.fec", FT_UINT32, BASE_DEC, VALS(fec_vals), 0x0,
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"Type of FEC", HFILL }},
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{&hf_wlan_radio_11ac_gid,
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{"Group Id", "wlan_radio.11ac.gid", FT_UINT32, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{&hf_wlan_radio_11ac_p_aid,
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{"Partial AID", "wlan_radio.11ac.paid", FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }},
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{&hf_wlan_radio_data_rate,
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{"Data rate", "wlan_radio.data_rate", FT_FLOAT, BASE_NONE, NULL, 0,
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"Speed at which this frame was sent/received", HFILL }},
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{&hf_wlan_radio_channel,
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{"Channel", "wlan_radio.channel", FT_UINT32, BASE_DEC, NULL, 0,
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"802.11 channel number that this frame was sent/received on", HFILL }},
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{&hf_wlan_radio_frequency,
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{"Frequency", "wlan_radio.frequency", FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_mhz, 0,
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"Center frequency of the 802.11 channel that this frame was sent/received on", HFILL }},
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{&hf_wlan_radio_short_preamble,
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{"Short preamble", "wlan_radio.short_preamble", FT_BOOLEAN, BASE_NONE, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_signal_percent,
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{"Signal strength (percentage)", "wlan_radio.signal_percentage", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_percent, 0,
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"Signal strength, as percentage of maximum RSSI", HFILL }},
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{&hf_wlan_radio_signal_dbm,
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{"Signal strength (dBm)", "wlan_radio.signal_dbm", FT_INT8, BASE_DEC|BASE_UNIT_STRING, &units_dbm, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_noise_percent,
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{"Noise level (percentage)", "wlan_radio.noise_percentage", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_percent, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_noise_dbm,
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{"Noise level (dBm)", "wlan_radio.noise_dbm", FT_INT8, BASE_DEC|BASE_UNIT_STRING, &units_dbm, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_timestamp,
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{"TSF timestamp", "wlan_radio.timestamp", FT_UINT64, BASE_DEC, NULL, 0,
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"Timing Synchronization Function timestamp", HFILL }},
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{&hf_wlan_last_part_of_a_mpdu,
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{"Last part of an A-MPDU", "wlan_radio.last_part_of_an_ampdu", FT_BOOLEAN, 32, NULL, PHDR_802_11_LAST_PART_OF_A_MPDU,
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"This is the last part of an A-MPDU", HFILL }},
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{&hf_wlan_a_mpdu_delim_crc_error,
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{"A-MPDU delimiter CRC error", "wlan_radio.a_mpdu_delim_crc_error", FT_BOOLEAN, 32, NULL, PHDR_802_11_A_MPDU_DELIM_CRC_ERROR,
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NULL, HFILL }},
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{&hf_wlan_a_mpdu_aggregate_id,
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{"A-MPDU aggregate ID", "wlan_radio.a_mpdu_aggregate_id", FT_UINT32, BASE_DEC, NULL, 0,
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NULL, HFILL }},
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{&hf_wlan_radio_duration,
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{"Duration", "wlan_radio.duration", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_microseconds, 0,
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"Total duration of the frame in microseconds, including any preamble or plcp header. "
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"Calculated from the frame length, modulation and other phy data.", HFILL }},
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{&hf_wlan_radio_preamble,
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{"Preamble", "wlan_radio.preamble", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_microseconds, 0,
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"Duration of the PLCP or preamble in microseconds, calculated from PHY data", HFILL }},
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{&hf_wlan_radio_aggregate,
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{"A-MPDU", "wlan_radio.aggregate", FT_NONE, BASE_NONE, NULL, 0,
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"MPDU is part of an A-MPDU", HFILL }},
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{&hf_wlan_radio_ifs,
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{"IFS", "wlan_radio.ifs", FT_INT64, BASE_DEC|BASE_UNIT_STRING, &units_microseconds, 0,
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"Inter Frame Space before this frame in microseconds, calculated from PHY data", HFILL }},
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{&hf_wlan_radio_start_tsf,
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{"Start", "wlan_radio.start_tsf", FT_UINT64, BASE_DEC|BASE_UNIT_STRING, &units_microseconds, 0,
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"Calculated start time of the frame", HFILL }},
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{&hf_wlan_radio_end_tsf,
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{"End", "wlan_radio.end_tsf", FT_UINT64, BASE_DEC|BASE_UNIT_STRING, &units_microseconds, 0,
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"Calculated end time of the frame", HFILL }},
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{&hf_wlan_radio_aggregate_duration,
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{"Duration", "wlan_radio.aggregate.duration", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_microseconds, 0,
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"Total duration of the aggregate in microseconds, including any preamble or plcp header. "
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"Calculated from the total subframe lengths, modulation and other phy data.", HFILL }},
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};
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static gint *ett[] = {
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&ett_wlan_radio,
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&ett_wlan_radio_11ac_user,
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&ett_wlan_radio_duration,
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&ett_wlan_radio_aggregate
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};
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static ei_register_info ei[] = {
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{ &ei_wlan_radio_assumed_short_preamble,
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{ "wlan_radio.assumed.short_preamble", PI_ASSUMPTION, PI_WARN,
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"No preamble length information was available, assuming short preamble.", EXPFILL }},
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{ &ei_wlan_radio_assumed_non_greenfield,
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{ "wlan_radio.assumed.non_greenfield", PI_ASSUMPTION, PI_WARN,
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"No plcp type information was available, assuming non greenfield.", EXPFILL }},
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{ &ei_wlan_radio_assumed_no_stbc,
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{ "wlan_radio.assumed.no_stbc", PI_ASSUMPTION, PI_WARN,
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"No stbc information was available, assuming no stbc.", EXPFILL }},
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{ &ei_wlan_radio_assumed_no_extension_streams,
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{ "wlan_radio.assumed.no_extension_streams", PI_ASSUMPTION, PI_WARN,
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"No extension stream information was available, assuming no extension streams.", EXPFILL }},
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{ &ei_wlan_radio_assumed_bcc_fec,
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{ "wlan_radio.assumed.bcc_fec", PI_ASSUMPTION, PI_WARN,
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"No fec type information was available, assuming bcc fec.", EXPFILL }},
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};
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module_t *wlan_radio_module;
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expert_module_t* expert_wlan_radio;
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proto_wlan_radio = proto_register_protocol("802.11 radio information", "802.11 Radio", "wlan_radio");
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proto_register_field_array(proto_wlan_radio, hf_wlan_radio, array_length(hf_wlan_radio));
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proto_register_subtree_array(ett, array_length(ett));
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expert_wlan_radio = expert_register_protocol(proto_wlan_radio);
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expert_register_field_array(expert_wlan_radio, ei, array_length(ei));
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wlan_radio_handle = register_dissector("wlan_radio", dissect_wlan_radio, proto_wlan_radio);
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wlan_noqos_radio_handle = register_dissector("wlan_noqos_radio", dissect_wlan_noqos_radio, proto_wlan_radio);
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wlan_radio_module = prefs_register_protocol(proto_wlan_radio, NULL);
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prefs_register_bool_preference(wlan_radio_module, "always_short_preamble",
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"802.11/11b preamble length is always short",
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"Some generators incorrectly indicate long preamble when the preamble was actually"
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"short. Always assume short preamble when calculating duration.",
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&wlan_radio_always_short_preamble);
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prefs_register_bool_preference(wlan_radio_module, "tsf_at_end",
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"TSF indicates the end of the PPDU",
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"Some generators timestamp the end of the PPDU rather than the start of the (A)MPDU.",
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&wlan_radio_tsf_at_end);
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prefs_register_bool_preference(wlan_radio_module, "timeline",
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"Enable Wireless Timeline (experimental)",
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"Enables an additional panel for navigating through packets",
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&wlan_radio_timeline_enabled);
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register_init_routine( setup_ieee80211_radio );
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register_cleanup_routine( cleanup_ieee80211_radio );
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}
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void proto_reg_handoff_ieee80211_radio(void)
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{
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/* Register handoff to radio-header dissectors */
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dissector_add_uint("wtap_encap", WTAP_ENCAP_IEEE_802_11_WITH_RADIO,
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wlan_radio_handle);
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ieee80211_handle = find_dissector_add_dependency("wlan", proto_wlan_radio);
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ieee80211_noqos_handle = find_dissector_add_dependency("wlan_noqos", proto_wlan_radio);
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wlan_radio_timeline_tap = register_tap("wlan_radio_timeline");
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}
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/*
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* Editor modelines
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*
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* Local Variables:
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* c-basic-offset: 2
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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