forked from osmocom/wireshark
918 lines
38 KiB
C
918 lines
38 KiB
C
/* packet-btbredr_rf.c
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* Routines for Bluetooth Pseudoheader for BR/EDR Baseband
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*
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* Copyright 2014, Michal Labedzki for Tieto Corporation
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* Copyright 2014, Dominic Spill <dominicgs@gmail.com>
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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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* 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 "packet-bluetooth.h"
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static int proto_btbredr_rf = -1;
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static int hf_rf_channel = -1;
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static int hf_uncertain_rf_channel = -1;
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static int hf_signal_power = -1;
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static int hf_invalid_signal_power = -1;
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static int hf_noise_power = -1;
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static int hf_invalid_noise_power = -1;
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static int hf_access_address_offenses = -1;
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static int hf_payload_transport_rate = -1;
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static int hf_payload_transport_rate_payload = -1;
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static int hf_payload_transport_rate_transport = -1;
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static int hf_payload_transport_rate_ignored = -1;
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static int hf_corrected_header_bits = -1;
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static int hf_corrected_payload_bits = -1;
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static int hf_lower_address_part = -1;
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static int hf_reference_lower_address_part = -1;
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static int hf_invalid_reference_lower_address_part = -1;
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static int hf_reference_upper_addres_part = -1;
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static int hf_invalid_reference_upper_addres_part = -1;
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static int hf_whitened_packet_header = -1;
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static int hf_packet_header = -1;
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static int hf_packet_header_reserved = -1;
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static int hf_packet_header_lt_addr = -1;
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static int hf_packet_header_type = -1;
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static int hf_packet_header_type_any = -1;
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static int hf_packet_header_type_sco_br = -1;
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static int hf_packet_header_type_esco_br = -1;
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static int hf_packet_header_type_esco_edr = -1;
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static int hf_packet_header_type_acl_br = -1;
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static int hf_packet_header_type_acl_edr = -1;
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static int hf_packet_header_type_csb_br = -1;
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static int hf_packet_header_type_csb_edr = -1;
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static int hf_packet_header_flow_control = -1;
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static int hf_packet_header_acknowledge_indication = -1;
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static int hf_packet_header_sequence_number = -1;
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static int hf_packet_header_header_error_check = -1;
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static int hf_flags = -1;
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static int hf_flags_reserved_15_14 = -1;
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static int hf_flags_mic_pass = -1;
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static int hf_flags_mic_checked = -1;
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static int hf_flags_crc_pass = -1;
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static int hf_flags_crc_checked = -1;
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static int hf_flags_hec_pass = -1;
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static int hf_flags_hec_checked = -1;
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static int hf_flags_reference_upper_addres_part_valid = -1;
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static int hf_flags_rf_channel_aliasing = -1;
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static int hf_flags_br_edr_data_present = -1;
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static int hf_flags_reference_lower_address_part_valid = -1;
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static int hf_flags_bredr_payload_decrypted = -1;
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static int hf_flags_noise_power_valid = -1;
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static int hf_flags_signal_power_valid = -1;
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static int hf_flags_packet_header_and_br_edr_payload_dewhitened = -1;
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static int hf_whitened_data = -1;
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static int hf_encrypted_data = -1;
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static int hf_data = -1;
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#define FLAGS_MIC_PASS 0x2000
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#define FLAGS_MIC_CHECKED 0x1000
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#define FLAGS_CRC_PASS 0x0800
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#define FLAGS_CRC_CHECKED 0x0400
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#define FLAGS_HEC_PASS 0x0200
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#define FLAGS_HEC_CHECKED 0x0100
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#define FLAGS_REFERENCE_UPPER_ADDRES_PART_VALID 0x0080
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#define FLAGS_RF_CHANNEL_ALIASING 0x0040
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#define FLAGS_BR_EDR_DATA_PRESENT 0x0020
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#define FLAGS_REFERENCE_LOWER_ADDRESS_PART_VALID 0x0010
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#define FLAGS_BREDR_PAYLOAD_DECRYPTED 0x0008
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#define FLAGS_NOISE_POWER_VALID 0x0004
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#define FLAGS_SIGNAL_POWER_VALID 0x0002
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#define FLAGS_PACKET_HEADER_AND_BR_EDR_PAYLOAD_DEWHITENED 0x0001
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static int * const hfx_payload_transport_rate[] = {
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&hf_payload_transport_rate_payload,
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&hf_payload_transport_rate_transport,
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NULL
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};
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static expert_field ei_unexpected_data = EI_INIT;
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static expert_field ei_reserved_not_zero = EI_INIT;
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static expert_field ei_incorrect_packet_header_or_hec = EI_INIT;
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static expert_field ei_packet_header_with_hec_not_checked = EI_INIT;
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static gint ett_btbredr_rf = -1;
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static gint ett_flags = -1;
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static gint ett_payload_transport_rate = -1;
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static gint ett_packet_header = -1;
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static gint ett_bluetooth_header = -1;
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static dissector_table_t packet_type_sco_br_table;
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static dissector_table_t packet_type_esco_br_table;
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static dissector_table_t packet_type_esco_edr_table;
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static dissector_table_t packet_type_acl_br_table;
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static dissector_table_t packet_type_acl_edr_table;
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static dissector_table_t packet_type_csb_br_table;
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static dissector_table_t packet_type_csb_edr_table;
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static dissector_handle_t btbredr_rf_handle;
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static const value_string payload_transport_rate_transport_vals[] = {
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{ 0x00, "Any" },
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{ 0x01, "SCO" },
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{ 0x02, "eSCO" },
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{ 0x03, "ACL" },
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{ 0x04, "CSB" },
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{ 0, NULL }
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};
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#define TRANSPORT_ANY 0x00
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#define TRANSPORT_SCO 0x10
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#define TRANSPORT_eSCO 0x20
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#define TRANSPORT_ACL 0x30
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#define TRANSPORT_CSB 0x40
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static const value_string payload_transport_rate_payload_vals[] = {
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{ 0x00, "Basic Rate with GFSK demodulation" },
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{ 0x01, "Enhanced Data Rate with PI/2-DQPSK demodulation" },
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{ 0x02, "Enhanced Data Rate with 8DPSK demodulation" },
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{ 0, NULL }
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};
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static const value_string payload_transport_rate_payload_abbrev_vals[] = {
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{ 0x00, "BR 1Mbps" },
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{ 0x01, "EDR 2Mbps" },
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{ 0x02, "EDR 3Mbps" },
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{ 0, NULL }
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};
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#define PAYLOAD_BR 0x00
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#define PAYLOAD_EDR_2 0x01
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#define PAYLOAD_EDR_3 0x02
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#define PACKET_TYPE_UNKNOWN -1
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static const value_string packet_type_any_vals[] = {
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{ 0x00, "NULL" },
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{ 0x01, "POLL" },
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{ 0x02, "FHS" },
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{ 0x03, "DM1" },
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{ 0x04, "DH1/2-DH1" },
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{ 0x05, "HV1" },
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{ 0x06, "HV2/2-EV3" },
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{ 0x07, "HV3/EV3/3-EV3" },
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{ 0x08, "DV/3-DH1" },
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{ 0x09, "AUX1" },
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{ 0x0A, "DM3/2-DH3" },
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{ 0x0B, "DH3/3-DH3" },
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{ 0x0C, "EV4/2-EV5" },
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{ 0x0D, "EV5/3-EV5" },
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{ 0x0E, "DM5/2-DH5" },
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{ 0x0F, "DH5/3-DH5" },
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{ 0, NULL }
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};
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static const value_string packet_type_sco_br_vals[] = {
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{ 0x00, "NULL" },
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{ 0x01, "POLL" },
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{ 0x02, "FHS" },
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{ 0x03, "DM1" },
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{ 0x04, "undefined" },
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{ 0x05, "HV1" },
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{ 0x06, "HV2" },
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{ 0x07, "HV3" },
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{ 0x08, "DV" },
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{ 0x09, "undefined" },
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{ 0x0A, "undefined" },
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{ 0x0B, "undefined" },
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{ 0x0C, "undefined" },
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{ 0x0D, "undefined" },
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{ 0x0E, "undefined" },
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{ 0x0F, "undefined" },
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{ 0, NULL }
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};
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static const value_string packet_type_esco_br_vals[] = {
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{ 0x00, "NULL" },
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{ 0x01, "POLL" },
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{ 0x02, "reserved" },
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{ 0x03, "reserved" },
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{ 0x04, "undefined" },
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{ 0x05, "undefined" },
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{ 0x06, "undefined" },
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{ 0x07, "EV3" },
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{ 0x08, "undefined" },
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{ 0x09, "undefined" },
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{ 0x0A, "undefined" },
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{ 0x0B, "undefined" },
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{ 0x0C, "EV4" },
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{ 0x0D, "EV5" },
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{ 0x0E, "undefined" },
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{ 0x0F, "undefined" },
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{ 0, NULL }
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};
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static const value_string packet_type_esco_edr_vals[] = {
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{ 0x00, "NULL" },
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{ 0x01, "POLL" },
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{ 0x02, "reserved" },
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{ 0x03, "reserved" },
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{ 0x04, "undefined" },
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{ 0x05, "undefined" },
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{ 0x06, "2-EV3" },
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{ 0x07, "3-EV3" },
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{ 0x08, "undefined" },
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{ 0x09, "undefined" },
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{ 0x0A, "undefined" },
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{ 0x0B, "undefined" },
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{ 0x0C, "2-EV5" },
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{ 0x0D, "3-EV5" },
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{ 0x0E, "undefined" },
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{ 0x0F, "undefined" },
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{ 0, NULL }
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};
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static const value_string packet_type_acl_br_vals[] = {
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{ 0x00, "NULL" },
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{ 0x01, "POLL" },
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{ 0x02, "FHS" },
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{ 0x03, "DM1" },
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{ 0x04, "DH1" },
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{ 0x05, "undefined" },
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{ 0x06, "undefined" },
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{ 0x07, "undefined" },
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{ 0x08, "undefined" },
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{ 0x09, "AUX1" },
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{ 0x0A, "DM3" },
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{ 0x0B, "DH3" },
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{ 0x0C, "undefined" },
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{ 0x0D, "undefined" },
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{ 0x0E, "DM5" },
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{ 0x0F, "DH5" },
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{ 0, NULL }
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};
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static const value_string packet_type_acl_edr_vals[] = {
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{ 0x00, "NULL" },
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{ 0x01, "POLL" },
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{ 0x02, "FHS" },
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{ 0x03, "DM1" },
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{ 0x04, "2-DH1" },
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{ 0x05, "undefined" },
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{ 0x06, "undefined" },
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{ 0x07, "undefined" },
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{ 0x08, "3-DH1" },
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{ 0x09, "AUX1" },
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{ 0x0A, "2-DH3" },
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{ 0x0B, "3-DH3" },
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{ 0x0C, "undefined" },
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{ 0x0D, "undefined" },
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{ 0x0E, "2-DH5" },
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{ 0x0F, "3-DH5" },
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{ 0, NULL }
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};
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static const value_string packet_type_csb_br_vals[] = {
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{ 0x00, "NULL" },
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{ 0x01, "reserved" },
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{ 0x02, "reserved" },
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{ 0x03, "DM1" },
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{ 0x04, "DH1" },
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{ 0x05, "undefined" },
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{ 0x06, "undefined" },
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{ 0x07, "undefined" },
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{ 0x08, "undefined" },
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{ 0x09, "undefined" },
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{ 0x0A, "DM3" },
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{ 0x0B, "DH3" },
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{ 0x0C, "undefined" },
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{ 0x0D, "undefined" },
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{ 0x0E, "DM5" },
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{ 0x0F, "DH5" },
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{ 0, NULL }
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};
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static const value_string packet_type_csb_edr_vals[] = {
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{ 0x00, "NULL" },
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{ 0x01, "reserved" },
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{ 0x02, "reserved" },
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{ 0x03, "DM1" },
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{ 0x04, "2-DH1" },
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{ 0x05, "undefined" },
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{ 0x06, "undefined" },
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{ 0x07, "undefined" },
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{ 0x08, "3-DH1" },
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{ 0x09, "undefined" },
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{ 0x0A, "2-DH3" },
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{ 0x0B, "3-DH3" },
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{ 0x0C, "undefined" },
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{ 0x0D, "undefined" },
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{ 0x0E, "2-DH5" },
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{ 0x0F, "3-DH5" },
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{ 0, NULL }
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};
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void proto_register_btbredr_rf(void);
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void proto_reg_handoff_btbredr_rf(void);
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static guint8 reverse_bits(guint8 value)
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{
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return (value & 0x80) >> 7 | (value & 0x40) >> 5 | (value & 0x20) >> 3 |
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(value & 0x10) >> 1 | (value & 0x08) << 1 | (value & 0x04) << 3 |
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(value & 0x02) << 5 | (value & 0x01) << 7;
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}
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static gboolean check_hec(guint8 uap, guint32 header)
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{
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guint8 hec;
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guint16 header_data;
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guint8 lfsr;
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gint8 i;
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hec = header & 0xFF;
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header_data = (header >> 8) & 0x3F;
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lfsr = uap;
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for (i = 9; i >= 0; i -= 1) {
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if (lfsr & 0x80)
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lfsr ^= 0x65;
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lfsr = (lfsr << 1) | (((lfsr >> 7) ^ (header_data >> i)) & 0x01);
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}
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lfsr = reverse_bits(lfsr);
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return lfsr == hec;
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}
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static gint
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dissect_btbredr_rf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
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{
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proto_item *btbredr_rf_item;
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proto_tree *btbredr_rf_tree;
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proto_item *flags_item;
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proto_tree *flags_tree;
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proto_item *header_item;
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proto_tree *header_tree;
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proto_item *reserved_item;
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proto_item *hec_item = NULL;
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gint offset = 0;
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gint hf_x;
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guint16 flags;
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guint8 payload_and_transport;
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gint16 packet_type = PACKET_TYPE_UNKNOWN;
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const gchar *packet_type_str = "Unknown";
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dissector_table_t packet_type_table = NULL;
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bluetooth_data_t *bluetooth_data = (bluetooth_data_t *) data;
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btbredr_rf_item = proto_tree_add_item(tree, proto_btbredr_rf, tvb, offset, -1, ENC_NA);
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btbredr_rf_tree = proto_item_add_subtree(btbredr_rf_item, ett_btbredr_rf);
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "BT BR/EDR RF");
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if (tvb_captured_length(tvb) >= 21) {
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flags = tvb_get_guint16(tvb, 20, ENC_LITTLE_ENDIAN);
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} else {
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flags = 0;
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}
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if (flags & FLAGS_RF_CHANNEL_ALIASING)
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hf_x = hf_uncertain_rf_channel;
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else
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hf_x = hf_rf_channel;
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proto_tree_add_item(btbredr_rf_tree, hf_x, tvb, offset, 1, ENC_NA);
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offset += 1;
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if (flags & FLAGS_SIGNAL_POWER_VALID)
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hf_x = hf_signal_power;
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else
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hf_x = hf_invalid_signal_power;
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proto_tree_add_item(btbredr_rf_tree, hf_x, tvb, offset, 1, ENC_NA);
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offset += 1;
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if (flags & FLAGS_NOISE_POWER_VALID)
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hf_x = hf_noise_power;
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else
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hf_x = hf_invalid_noise_power;
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proto_tree_add_item(btbredr_rf_tree, hf_x, tvb, offset, 1, ENC_NA);
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offset += 1;
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proto_tree_add_item(btbredr_rf_tree, hf_access_address_offenses, tvb, offset, 1, ENC_NA);
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offset += 1;
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payload_and_transport = tvb_get_guint8(tvb, offset);
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col_add_fstr(pinfo->cinfo, COL_INFO, "Transport: %s (%s), RF Channel: %s%2u",
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val_to_str_const(payload_and_transport >> 4, payload_transport_rate_transport_vals, "Unknown"),
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val_to_str_const(payload_and_transport & 0xF, payload_transport_rate_payload_abbrev_vals, "Unknown"),
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(flags & FLAGS_RF_CHANNEL_ALIASING) ? "~" : "",
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tvb_get_guint8(tvb, 0));
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if (payload_and_transport == 0xFF)
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proto_tree_add_item(btbredr_rf_tree, hf_payload_transport_rate_ignored, tvb, offset, 1, ENC_NA);
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else
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proto_tree_add_bitmask(btbredr_rf_tree, tvb, offset, hf_payload_transport_rate, ett_payload_transport_rate, hfx_payload_transport_rate, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(btbredr_rf_tree, hf_corrected_header_bits, tvb, offset, 1, ENC_NA);
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offset += 1;
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proto_tree_add_item(btbredr_rf_tree, hf_corrected_payload_bits, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(btbredr_rf_tree, hf_lower_address_part, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset += 4;
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if (flags & FLAGS_REFERENCE_LOWER_ADDRESS_PART_VALID)
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hf_x = hf_reference_lower_address_part;
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else
|
|
hf_x = hf_invalid_reference_lower_address_part;
|
|
proto_tree_add_item(btbredr_rf_tree, hf_x, tvb, offset, 3, ENC_LITTLE_ENDIAN);
|
|
offset += 3;
|
|
|
|
if (flags & FLAGS_REFERENCE_UPPER_ADDRES_PART_VALID)
|
|
hf_x = hf_reference_upper_addres_part;
|
|
else
|
|
hf_x = hf_invalid_reference_upper_addres_part;
|
|
proto_tree_add_item(btbredr_rf_tree, hf_x, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
|
|
if (!(flags & FLAGS_PACKET_HEADER_AND_BR_EDR_PAYLOAD_DEWHITENED)) {
|
|
proto_tree_add_item(btbredr_rf_tree, hf_whitened_packet_header, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
} else {
|
|
header_item = proto_tree_add_item(btbredr_rf_tree, hf_packet_header, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
header_tree = proto_item_add_subtree(header_item, ett_bluetooth_header);
|
|
|
|
proto_tree_add_item(header_tree, hf_packet_header_reserved, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(header_tree, hf_packet_header_lt_addr, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
if (payload_and_transport == (TRANSPORT_SCO | PAYLOAD_BR)) {
|
|
proto_tree_add_item(header_tree, hf_packet_header_type_sco_br, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
packet_type = (tvb_get_guint8(tvb, offset + 1) >> 3) & 0xF;
|
|
packet_type_str = val_to_str_const(packet_type, packet_type_sco_br_vals, "Unknown");
|
|
packet_type_table = packet_type_sco_br_table;
|
|
} else if (payload_and_transport == (TRANSPORT_eSCO | PAYLOAD_BR)) {
|
|
proto_tree_add_item(header_tree, hf_packet_header_type_esco_br, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
packet_type = (tvb_get_guint8(tvb, offset + 1) >> 3) & 0xF;
|
|
packet_type_str = val_to_str_const(packet_type, packet_type_esco_br_vals, "Unknown");
|
|
packet_type_table = packet_type_esco_br_table;
|
|
} else if (payload_and_transport == (TRANSPORT_eSCO | PAYLOAD_EDR_2) || payload_and_transport == (TRANSPORT_eSCO | PAYLOAD_EDR_3)) {
|
|
proto_tree_add_item(header_tree, hf_packet_header_type_esco_edr, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
packet_type = (tvb_get_guint8(tvb, offset + 1) >> 3) & 0xF;
|
|
packet_type_str = val_to_str_const(packet_type, packet_type_esco_edr_vals, "Unknown");
|
|
packet_type_table = packet_type_esco_edr_table;
|
|
} else if (payload_and_transport == (TRANSPORT_ACL | PAYLOAD_BR)) {
|
|
proto_tree_add_item(header_tree, hf_packet_header_type_acl_br, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
packet_type = (tvb_get_guint8(tvb, offset + 1) >> 3) & 0xF;
|
|
packet_type_str = val_to_str_const(packet_type, packet_type_acl_br_vals, "Unknown");
|
|
packet_type_table = packet_type_acl_br_table;
|
|
} else if (payload_and_transport == (TRANSPORT_ACL | PAYLOAD_EDR_2) || payload_and_transport == (TRANSPORT_ACL | PAYLOAD_EDR_3)) {
|
|
proto_tree_add_item(header_tree, hf_packet_header_type_acl_edr, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
packet_type = (tvb_get_guint8(tvb, offset + 1) >> 3) & 0xF;
|
|
packet_type_str = val_to_str_const(packet_type, packet_type_acl_edr_vals, "Unknown");
|
|
packet_type_table = packet_type_acl_edr_table;
|
|
} else if (payload_and_transport == (TRANSPORT_CSB | PAYLOAD_BR)) {
|
|
proto_tree_add_item(header_tree, hf_packet_header_type_csb_br, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
packet_type = (tvb_get_guint8(tvb, offset + 1) >> 3) & 0xF;
|
|
packet_type_str = val_to_str_const(packet_type, packet_type_csb_br_vals, "Unknown");
|
|
packet_type_table = packet_type_csb_br_table;
|
|
} else if (payload_and_transport == (TRANSPORT_CSB | PAYLOAD_EDR_2) || payload_and_transport == (TRANSPORT_ACL | PAYLOAD_EDR_3)) {
|
|
proto_tree_add_item(header_tree, hf_packet_header_type_csb_edr, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
packet_type = (tvb_get_guint8(tvb, offset + 1) >> 3) & 0xF;
|
|
packet_type_str = val_to_str_const(packet_type, packet_type_csb_edr_vals, "Unknown");
|
|
packet_type_table = packet_type_csb_edr_table;
|
|
} else if ((payload_and_transport >> 4) == TRANSPORT_ANY) {
|
|
proto_tree_add_item(header_tree, hf_packet_header_type_any, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
packet_type = (tvb_get_guint8(tvb, offset + 1) >> 3) & 0xF;
|
|
packet_type_str = val_to_str_const(packet_type, packet_type_any_vals, "Unknown");
|
|
} else {
|
|
proto_tree_add_item(header_tree, hf_packet_header_type, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
}
|
|
|
|
proto_tree_add_item(header_tree, hf_packet_header_flow_control, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(header_tree, hf_packet_header_acknowledge_indication, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(header_tree, hf_packet_header_sequence_number, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
hec_item = proto_tree_add_item(header_tree, hf_packet_header_header_error_check, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
}
|
|
|
|
if ((flags & FLAGS_REFERENCE_UPPER_ADDRES_PART_VALID) &&
|
|
(flags & FLAGS_PACKET_HEADER_AND_BR_EDR_PAYLOAD_DEWHITENED) &&
|
|
!check_hec(tvb_get_guint8(tvb, offset - 1), tvb_get_guint32(tvb, offset, ENC_LITTLE_ENDIAN))) {
|
|
expert_add_info(pinfo, hec_item, &ei_incorrect_packet_header_or_hec);
|
|
}
|
|
if (!((flags & FLAGS_REFERENCE_UPPER_ADDRES_PART_VALID) &&
|
|
(flags & FLAGS_PACKET_HEADER_AND_BR_EDR_PAYLOAD_DEWHITENED))) {
|
|
expert_add_info(pinfo, hec_item, &ei_packet_header_with_hec_not_checked);
|
|
}
|
|
|
|
offset += 4;
|
|
|
|
flags_item = proto_tree_add_item(btbredr_rf_tree, hf_flags, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
flags_tree = proto_item_add_subtree(flags_item, ett_flags);
|
|
|
|
flags = tvb_get_guint16(tvb, offset, ENC_LITTLE_ENDIAN);
|
|
|
|
reserved_item = proto_tree_add_item(flags_tree, hf_flags_reserved_15_14, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
if (flags & 0xC000) {
|
|
expert_add_info(pinfo, reserved_item, &ei_reserved_not_zero);
|
|
}
|
|
|
|
proto_tree_add_item(flags_tree, hf_flags_mic_pass, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_mic_checked, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_crc_pass, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_crc_checked, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_hec_pass, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_hec_checked, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_reference_upper_addres_part_valid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_rf_channel_aliasing, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_br_edr_data_present, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_reference_lower_address_part_valid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_bredr_payload_decrypted, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_noise_power_valid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_signal_power_valid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
proto_tree_add_item(flags_tree, hf_flags_packet_header_and_br_edr_payload_dewhitened, tvb, offset, 2, ENC_LITTLE_ENDIAN);
|
|
|
|
offset += 2;
|
|
|
|
if ((flags & (FLAGS_SIGNAL_POWER_VALID | FLAGS_NOISE_POWER_VALID)) == (FLAGS_SIGNAL_POWER_VALID | FLAGS_NOISE_POWER_VALID)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (SP: %4i, NP: %4i)",
|
|
(gint)tvb_get_gint8(tvb, 1), (gint)tvb_get_gint8(tvb, 2));
|
|
} else if (flags & FLAGS_SIGNAL_POWER_VALID) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (SP: %4i)",
|
|
(gint)tvb_get_gint8(tvb, 1));
|
|
} else if (flags & FLAGS_NOISE_POWER_VALID) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (NP: %4i)",
|
|
(gint)tvb_get_gint8(tvb, 2));
|
|
}
|
|
|
|
if (flags & FLAGS_PACKET_HEADER_AND_BR_EDR_PAYLOAD_DEWHITENED)
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Packet Type: %s", packet_type_str);
|
|
|
|
if (flags & FLAGS_BR_EDR_DATA_PRESENT) {
|
|
if (flags & FLAGS_PACKET_HEADER_AND_BR_EDR_PAYLOAD_DEWHITENED) {
|
|
if (flags & FLAGS_BREDR_PAYLOAD_DECRYPTED) {
|
|
tvbuff_t *next_tvb;
|
|
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
if (!(packet_type_table && packet_type > PACKET_TYPE_UNKNOWN &&
|
|
dissector_try_uint_new(packet_type_table, packet_type, next_tvb, pinfo, tree, TRUE, bluetooth_data)))
|
|
proto_tree_add_item(btbredr_rf_tree, hf_data, tvb, offset, tvb_captured_length_remaining(tvb, offset), ENC_NA);
|
|
offset = tvb_reported_length(tvb);
|
|
} else {
|
|
proto_tree_add_item(btbredr_rf_tree, hf_encrypted_data, tvb, offset, tvb_captured_length_remaining(tvb, offset), ENC_NA);
|
|
offset = tvb_reported_length(tvb);
|
|
}
|
|
} else {
|
|
proto_tree_add_item(btbredr_rf_tree, hf_whitened_data, tvb, offset, tvb_captured_length_remaining(tvb, offset), ENC_NA);
|
|
offset = tvb_reported_length(tvb);
|
|
}
|
|
} else {
|
|
if (tvb_captured_length_remaining(tvb, offset) > 0)
|
|
proto_tree_add_expert(btbredr_rf_tree, pinfo, &ei_unexpected_data, tvb, offset, tvb_captured_length_remaining(tvb, offset));
|
|
offset = tvb_reported_length(tvb);
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
void
|
|
proto_register_btbredr_rf(void)
|
|
{
|
|
expert_module_t *expert_module;
|
|
|
|
static hf_register_info hf[] = {
|
|
{ &hf_rf_channel,
|
|
{ "RF Channel", "btbredr_rf.rf_channel",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_uncertain_rf_channel,
|
|
{ "Uncertain RF Channel", "btbredr_rf.uncertain_rf_channel",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_signal_power,
|
|
{ "Signal Power", "btbredr_rf.signal_power",
|
|
FT_INT8, BASE_DEC, NULL, 0x00,
|
|
"Signal Power in dBm", HFILL }
|
|
},
|
|
{ &hf_invalid_signal_power,
|
|
{ "Invalid Signal Power", "btbredr_rf.invalid.signal_power",
|
|
FT_INT8, BASE_DEC, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_noise_power,
|
|
{ "Noise Power", "btbredr_rf.noise_power",
|
|
FT_INT8, BASE_DEC, NULL, 0x00,
|
|
"Noise Power in dBm", HFILL }
|
|
},
|
|
{ &hf_invalid_noise_power,
|
|
{ "Invalid Noise Power", "btbredr_rf.invalid.noise_power",
|
|
FT_INT8, BASE_DEC, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_access_address_offenses,
|
|
{ "Access Address Offenses", "btbredr_rf.access_address_offenses",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_payload_transport_rate,
|
|
{ "Payload Transport Rate", "btbredr_rf.payload_transport_rate",
|
|
FT_UINT8, BASE_HEX, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_payload_transport_rate_ignored,
|
|
{ "Payload Transport Rate: Ignored", "btbredr_rf.payload_transport_rate.ignored",
|
|
FT_UINT8, BASE_HEX, NULL, 0x00,
|
|
"BT Packet Header is ignored and there is no payload", HFILL }
|
|
},
|
|
{ &hf_payload_transport_rate_transport,
|
|
{ "Transport", "btbredr_rf.payload_transport_rate.transport",
|
|
FT_UINT8, BASE_HEX, VALS(payload_transport_rate_transport_vals), 0xF0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_payload_transport_rate_payload,
|
|
{ "Payload", "btbredr_rf.payload_transport_rate.payload",
|
|
FT_UINT8, BASE_HEX, VALS(payload_transport_rate_payload_vals), 0x0F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_corrected_header_bits,
|
|
{ "Corrected Header Bits", "btbredr_rf.corrected_header_bits",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_corrected_payload_bits,
|
|
{ "Corrected Payload Bits", "btbredr_rf.corrected_payload_bits",
|
|
FT_INT16, BASE_DEC, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_lower_address_part,
|
|
{ "Lower Address Part", "btbredr_rf.lower_address_part",
|
|
FT_UINT32, BASE_HEX, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_reference_lower_address_part,
|
|
{ "Reference Lower Address Part", "btbredr_rf.reference_lower_address_part",
|
|
FT_UINT24, BASE_HEX, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_invalid_reference_lower_address_part,
|
|
{ "Invalid Reference Lower Address Part", "btbredr_rf.invalid.reference_lower_address_part",
|
|
FT_UINT24, BASE_HEX, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_reference_upper_addres_part,
|
|
{ "Reference Upper Address Part", "btbredr_rf.reference_upper_addres_part",
|
|
FT_UINT8, BASE_HEX, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_invalid_reference_upper_addres_part,
|
|
{ "Invalid Reference Upper Address Part", "btbredr_rf.invalid.reference_upper_addres_part",
|
|
FT_UINT8, BASE_HEX, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_whitened_packet_header,
|
|
{ "Whitened Packet Header", "btbredr_rf.whitened.packet_header",
|
|
FT_UINT32, BASE_HEX, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header,
|
|
{ "Packet Header", "btbredr_rf.packet_header",
|
|
FT_UINT32, BASE_HEX, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_reserved,
|
|
{ "Reserved", "btbredr_rf.packet_header.reserved",
|
|
FT_UINT32, BASE_HEX, NULL, 0xFFFC0000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_lt_addr,
|
|
{ "LT_ADDR", "btbredr_rf.packet_header.lt_addr",
|
|
FT_UINT32, BASE_HEX, NULL, 0x00038000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_type,
|
|
{ "Type", "btbredr_rf.packet_header.type",
|
|
FT_UINT32, BASE_HEX, NULL, 0x00007800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_type_any,
|
|
{ "Type", "btbredr_rf.packet_header.type",
|
|
FT_UINT32, BASE_HEX, VALS(packet_type_any_vals), 0x00007800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_type_sco_br,
|
|
{ "Type", "btbredr_rf.packet_header.type",
|
|
FT_UINT32, BASE_HEX, VALS(packet_type_sco_br_vals), 0x00007800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_type_esco_br,
|
|
{ "Type", "btbredr_rf.packet_header.type",
|
|
FT_UINT32, BASE_HEX, VALS(packet_type_esco_br_vals), 0x00007800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_type_esco_edr,
|
|
{ "Type", "btbredr_rf.packet_header.type",
|
|
FT_UINT32, BASE_HEX, VALS(packet_type_esco_edr_vals), 0x00007800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_type_acl_br,
|
|
{ "Type", "btbredr_rf.packet_header.type",
|
|
FT_UINT32, BASE_HEX, VALS(packet_type_acl_br_vals), 0x00007800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_type_acl_edr,
|
|
{ "Type", "btbredr_rf.packet_header.type",
|
|
FT_UINT32, BASE_HEX, VALS(packet_type_acl_edr_vals), 0x00007800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_type_csb_br,
|
|
{ "Type", "btbredr_rf.packet_header.type",
|
|
FT_UINT32, BASE_HEX, VALS(packet_type_csb_br_vals), 0x00007800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_type_csb_edr,
|
|
{ "Type", "btbredr_rf.packet_header.type",
|
|
FT_UINT32, BASE_HEX, VALS(packet_type_csb_edr_vals), 0x00007800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_flow_control,
|
|
{ "Flow Control", "btbredr_rf.packet_header.flow_control",
|
|
FT_BOOLEAN, 32, NULL, 0x00000400,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_packet_header_acknowledge_indication,
|
|
{ "ARQN", "btbredr_rf.packet_header.arqn",
|
|
FT_BOOLEAN, 32, NULL, 0x00000200,
|
|
"Acknowledge Indication", HFILL }
|
|
},
|
|
{ &hf_packet_header_sequence_number,
|
|
{ "SEQN", "btbredr_rf.packet_header.seqn",
|
|
FT_BOOLEAN, 32, NULL, 0x00000100,
|
|
"Sequence Number", HFILL }
|
|
},
|
|
{ &hf_packet_header_header_error_check,
|
|
{ "HEC", "btbredr_rf.packet_header.hec",
|
|
FT_UINT32, BASE_HEX, NULL, 0x000000FF,
|
|
"Header Error Check", HFILL }
|
|
},
|
|
{ &hf_flags,
|
|
{ "Flags", "btbredr_rf.flags",
|
|
FT_UINT16, BASE_HEX, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_whitened_data,
|
|
{ "Whitened Data", "btbredr_rf.whitened.data",
|
|
FT_NONE, BASE_NONE, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_encrypted_data,
|
|
{ "Encrypted Data", "btbredr_rf.encrypted.data",
|
|
FT_NONE, BASE_NONE, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_data,
|
|
{ "Data", "btbredr_rf.data",
|
|
FT_NONE, BASE_NONE, NULL, 0x00,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_reserved_15_14,
|
|
{ "Reserved", "btbredr_rf.flags.reserved.15_14",
|
|
FT_UINT16, BASE_HEX, NULL, 0xC000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_mic_pass,
|
|
{ "MIC Pass", "btbredr_rf.flags.mic_pass",
|
|
FT_BOOLEAN, 16, NULL, 0x2000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_mic_checked,
|
|
{ "MIC Checked", "btbredr_rf.flags.mic_check",
|
|
FT_BOOLEAN, 16, NULL, 0x1000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_crc_pass,
|
|
{ "CRC Pass", "btbredr_rf.flags.crc_pass",
|
|
FT_BOOLEAN, 16, NULL, 0x0800,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_crc_checked,
|
|
{ "CRC Checked", "btbredr_rf.flags.crc_check",
|
|
FT_BOOLEAN, 16, NULL, 0x0400,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_hec_pass,
|
|
{ "HEC Pass", "btbredr_rf.flags.hec_pass",
|
|
FT_BOOLEAN, 16, NULL, 0x0200,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_hec_checked,
|
|
{ "HEC Checked", "btbredr_rf.flags.hec_check",
|
|
FT_BOOLEAN, 16, NULL, 0x0100,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_reference_upper_addres_part_valid,
|
|
{ "Reference Upper Address Part Valid", "btbredr_rf.flags.reference_upper_addres_part_valid",
|
|
FT_BOOLEAN, 16, NULL, 0x0080,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_rf_channel_aliasing,
|
|
{ "RF Channel Aliasing", "btbredr_rf.flags.rf_channel_aliasing",
|
|
FT_BOOLEAN, 16, NULL, 0x0040,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_br_edr_data_present,
|
|
{ "BR or EDR Data Present", "btbredr_rf.flags.bredr_data_present",
|
|
FT_BOOLEAN, 16, NULL, 0x0020,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_reference_lower_address_part_valid,
|
|
{ "Reference Lower Address Part Valid", "btbredr_rf.flags.reference_lower_address_part_valid",
|
|
FT_BOOLEAN, 16, NULL, 0x0010,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_bredr_payload_decrypted,
|
|
{ "BR or EDR Payload Decrypted", "btbredr_rf.flags.bredr_payload_decrypted",
|
|
FT_BOOLEAN, 16, NULL, 0x0008,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_noise_power_valid,
|
|
{ "Noise Power Valid", "btbredr_rf.flags.noise_power_valid",
|
|
FT_BOOLEAN, 16, NULL, 0x0004,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_signal_power_valid,
|
|
{ "Signal Power Valid", "btbredr_rf.flags.signal_power_valid",
|
|
FT_BOOLEAN, 16, NULL, 0x0002,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_flags_packet_header_and_br_edr_payload_dewhitened,
|
|
{ "Packet Header and BR/EDR Payload Dewhitened", "btbredr_rf.flags.pkt_hdr_and_br_edr_payload_dewhitened",
|
|
FT_BOOLEAN, 16, NULL, 0x0001,
|
|
NULL, HFILL }
|
|
}
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_btbredr_rf,
|
|
&ett_flags,
|
|
&ett_payload_transport_rate,
|
|
&ett_packet_header,
|
|
&ett_bluetooth_header
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_unexpected_data, { "btbredr_rf.unexpected_data", PI_PROTOCOL, PI_WARN, "Unexpected data, BR or EDR Data Present flag is set to False", EXPFILL }},
|
|
{ &ei_reserved_not_zero, { "btbredr_rf.reserved_not_zero", PI_PROTOCOL, PI_WARN, "Reserved values are not zeros", EXPFILL }},
|
|
{ &ei_incorrect_packet_header_or_hec, { "btbredr_rf.incorrect_packet_header_or_hec", PI_PROTOCOL, PI_WARN, "Incorrect Packet Header or HEC", EXPFILL }},
|
|
{ &ei_packet_header_with_hec_not_checked, { "btbredr_rf.packet_header_with_hec_not_checked", PI_PROTOCOL, PI_NOTE, "Packet Header with HEC is not checked", EXPFILL }},
|
|
};
|
|
|
|
proto_btbredr_rf = proto_register_protocol("Bluetooth Pseudoheader for BR/EDR", "BT BR/EDR RF", "btbredr_rf");
|
|
proto_register_field_array(proto_btbredr_rf, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
btbredr_rf_handle = register_dissector("btbredr_rf", dissect_btbredr_rf, proto_btbredr_rf);
|
|
|
|
packet_type_sco_br_table = register_dissector_table("btbredr_rf.packet_type.sco.br", "BT Packet Type for SCO BR", proto_btbredr_rf, FT_UINT8, BASE_HEX);
|
|
packet_type_esco_br_table = register_dissector_table("btbredr_rf.packet_type.esco.br", "BT Packet Type for eSCO BR", proto_btbredr_rf, FT_UINT8, BASE_HEX);
|
|
packet_type_esco_edr_table = register_dissector_table("btbredr_rf.packet_type.esco.edr", "BT Packet Type for eSCO EDR", proto_btbredr_rf, FT_UINT8, BASE_HEX);
|
|
packet_type_acl_br_table = register_dissector_table("btbredr_rf.packet_type.acl.br", "BT Packet Type for ACL BR", proto_btbredr_rf, FT_UINT8, BASE_HEX);
|
|
packet_type_acl_edr_table = register_dissector_table("btbredr_rf.packet_type.acl.edr", "BT Packet Type for ACL EDR", proto_btbredr_rf, FT_UINT8, BASE_HEX);
|
|
packet_type_csb_br_table = register_dissector_table("btbredr_rf.packet_type.csb.br", "BT Packet Type for CSB BR", proto_btbredr_rf, FT_UINT8, BASE_HEX);
|
|
packet_type_csb_edr_table = register_dissector_table("btbredr_rf.packet_type.csb.edr", "BT Packet Type for CSB EDR", proto_btbredr_rf, FT_UINT8, BASE_HEX);
|
|
|
|
expert_module = expert_register_protocol(proto_btbredr_rf);
|
|
expert_register_field_array(expert_module, ei, array_length(ei));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_btbredr_rf(void)
|
|
{
|
|
dissector_add_uint("bluetooth.encap", WTAP_ENCAP_BLUETOOTH_BREDR_BB, btbredr_rf_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|