/* packet-obd-ii.c * Routines for OBD-II PIDs dissection * * Based on https://en.wikipedia.org/wiki/OBD-II_PIDs * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #include #include #include #include #include "packet-socketcan.h" #include "packet-iso15765.h" void proto_register_obdii(void); void proto_reg_handoff_obdii(void); static dissector_handle_t obdii_handle; static int proto_obdii; static int ett_obdii; static int hf_obdii_mode; static int hf_obdii_raw_value; static int hf_obdii_mode01_pid; static int hf_obdii_mode01_supported_pid; static int hf_obdii_mode01_unsupported_pid; static int hf_obdii_mode01_fuel_system1_status; static int hf_obdii_mode01_fuel_system2_status; static int hf_obdii_mode01_engine_load; static int hf_obdii_mode01_engine_coolant_temp; static int hf_obdii_mode01_short_term_fuel_bank1; static int hf_obdii_mode01_long_term_fuel_bank1; static int hf_obdii_mode01_short_term_fuel_bank2; static int hf_obdii_mode01_long_term_fuel_bank2; static int hf_obdii_mode01_fuel_pressure; static int hf_obdii_mode01_engine_rpm; static int hf_obdii_mode01_vehicle_speed; static int hf_obdii_mode01_timing_advance; static int hf_obdii_mode01_intake_air_temp; static int hf_obdii_mode01_maf_air_flow_rate; static int hf_obdii_mode01_throttle_position; static int hf_obdii_mode01_secondary_air_status; static int hf_obdii_mode01_obd_standards; static int hf_obdii_mode01_engine_uptime; static int hf_obdii_mode01_fuel_rail_pressure; static int hf_obdii_mode01_fuel_rail_gauge_pressure; static int hf_obdii_mode01_fuel_rail_absolute_pressure; static int hf_obdii_mode01_commanded_egr; static int hf_obdii_mode01_egr_error; static int hf_obdii_mode01_commanded_evap_purge; static int hf_obdii_mode01_fuel_tank_level_input; static int hf_obdii_mode01_warm_ups; static int hf_obdii_mode01_evap_system_vapor_pressure; static int hf_obdii_mode01_absolute_barometric_pressure; static int hf_obdii_mode01_intake_manifold_absolute_pressure; static int hf_obdii_mode01_oxygen_sensor_id; static int hf_obdii_mode01_oxygen_sensor_fuel_air_ratio; static int hf_obdii_mode01_oxygen_sensor_voltage; static int hf_obdii_mode01_oxygen_sensor_current; static int hf_obdii_mode01_distance_traveled_with_mil; static int hf_obdii_mode01_distance_traveled_since_code_clear; static int hf_obdii_mode01_time_run_with_mil; static int hf_obdii_mode01_time_since_trouble_code_clear; static int hf_obdii_mode01_catalyst_temp_11; static int hf_obdii_mode01_catalyst_temp_21; static int hf_obdii_mode01_catalyst_temp_12; static int hf_obdii_mode01_catalyst_temp_22; static int hf_obdii_mode01_ambient_air_temp; static int hf_obdii_mode01_absolute_throttle_position_B; static int hf_obdii_mode01_absolute_throttle_position_C; static int hf_obdii_mode01_accelerator_pedal_position_D; static int hf_obdii_mode01_accelerator_pedal_position_E; static int hf_obdii_mode01_accelerator_pedal_position_F; static int hf_obdii_mode01_commanded_throttle_actuator; static int hf_obdii_mode01_fuel_type; static int hf_obdii_mode01_control_module_voltage; static int hf_obdii_mode01_absolute_load_value; static int hf_obdii_mode01_fuel_air_commanded_equiv_ratio; static int hf_obdii_mode01_relative_throttle_position; static int hf_obdii_mode01_ethanol_fuel; static int hf_obdii_mode01_absolute_evap_system_vapor_pressure; static int hf_obdii_mode01_relative_accelerator_pedal_position; static int hf_obdii_mode01_hybrid_battery_remaining_life; static int hf_obdii_mode01_engine_oil_temp; static int hf_obdii_mode01_fuel_injection_timing; static int hf_obdii_mode01_engine_fuel_rate; static int hf_obdii_mode01_torque_driver_demand_engine; static int hf_obdii_mode01_torque_actual_engine; static int hf_obdii_mode01_torque_reference_engine; static int hf_obdii_mode09_pid; static int hf_obdii_mode09_supported_pid; static int hf_obdii_mode09_unsupported_pid; static int hf_obdii_vin; static int hf_obdii_ecu_name; static expert_field ei_obdii_padding; /* OBD-II CAN IDs have three aspects. - IDs are either standard 11bit format (SFF) or extended 29bit format (EFF) - An ID can be a query ID or a response ID. - Response IDs fall into two ranges for both SFF and EFF formats SFF response IDs can vary in the lowest nibble as follows: two ranges: 0x7e0-0x7e7 and 0x7e8 - 0x7ef EFF response IDs can vary in the lowest byte or the second lowest byte as follows: 0x18daXXf1 or 0x18daf1XX, where XX is in the range 0x00 - 0xff The following defines set up bit patterns and masks to determine both query and responses. */ #define ODBII_CAN_QUERY_ID_SFF 0x7DF #define ODBII_CAN_RESPONSE_ID_LOWER_MIN_SFF 0x7E0 #define ODBII_CAN_RESPONSE_ID_UPPER_MIN_SFF 0x7E8 #define ODBII_CAN_RESPONSE_ID_LOWER_MASK_SFF 0x7 #define ODBII_CAN_RESPONSE_ID_UPPER_MASK_SFF 0x7 #define ODBII_CAN_QUERY_ID_EFF 0x18DB33F1 #define ODBII_CAN_RESPONSE_ID_LOWER_MIN_EFF 0x18DA00F1 #define ODBII_CAN_RESPONSE_ID_UPPER_MIN_EFF 0x18DAF100 #define ODBII_CAN_RESPONSE_ID_LOWER_MASK_EFF 0xFF00 #define ODBII_CAN_RESPONSE_ID_UPPER_MASK_EFF 0x00FF #define OBDII_MODE_POS 0x00 #define OBDII_PID_POS 0x01 #define OBDII_VAL_OFF 0x02 #define OBDII_MODE07_DATA_OFF 0x01 #define OBDII_MODE01_PIDS_SUPPORT00 0x00 #define OBDII_MODE01_MONITOR_STATUS 0x01 #define OBDII_MODE01_FREEZE_DTC 0x02 #define OBDII_MODE01_FUEL_SYSTEM_STATUS 0x03 #define OBDII_MODE01_ENGINE_LOAD 0x04 #define OBDII_MODE01_ENGINE_COOLANT_TEMP 0x05 #define OBDII_MODE01_SHORT_TERM_FUEL_BANK1 0x06 #define OBDII_MODE01_LONG_TERM_FUEL_BANK1 0x07 #define OBDII_MODE01_SHORT_TERM_FUEL_BANK2 0x08 #define OBDII_MODE01_LONG_TERM_FUEL_BANK2 0x09 #define OBDII_MODE01_FUEL_PRESSURE 0x0A #define OBDII_MODE01_INTAKE_MANIFOLD_ABSOLUTE_PRESSURE 0x0B #define OBDII_MODE01_ENGINE_RPM 0x0C #define OBDII_MODE01_VEHICLE_SPEED 0x0D #define OBDII_MODE01_TIMING_ADVANCE 0x0E #define OBDII_MODE01_INTAKE_AIR_TEMP 0x0F #define OBDII_MODE01_MAF_AIR_FLOW_RATE 0x10 #define OBDII_MODE01_THROTTLE_POSITION 0x11 #define OBDII_MODE01_SECONDARY_AIR_STATUS 0x12 #define OBDII_MODE01_OXYGEN_SENSOR_PRESET2 0x13 #define OBDII_MODE01_OXYGEN_SENSOR1 0x14 #define OBDII_MODE01_OXYGEN_SENSOR2 0x15 #define OBDII_MODE01_OXYGEN_SENSOR3 0x16 #define OBDII_MODE01_OXYGEN_SENSOR4 0x17 #define OBDII_MODE01_OXYGEN_SENSOR5 0x18 #define OBDII_MODE01_OXYGEN_SENSOR6 0x19 #define OBDII_MODE01_OXYGEN_SENSOR7 0x1A #define OBDII_MODE01_OXYGEN_SENSOR8 0x1B #define OBDII_MODE01_OBD_STANDARDS 0x1C #define OBDII_MODE01_OXYGEN_SENSOR_PRESET4 0x1D #define OBDII_MODE01_AUX_INPUT_STATUS 0x1E #define OBDII_MODE01_ENGINE_UPTIME 0x1F #define OBDII_MODE01_PIDS_SUPPORT20 0x20 #define OBDII_MODE01_DISTANCE_TRAVELED_WITH_MIL 0x21 #define OBDII_MODE01_FUEL_RAIL_PRESSURE 0x22 #define OBDII_MODE01_FUEL_RAIL_GAUGE_PRESSURE 0x23 #define OBDII_MODE01_OXYGEN_SENSOR1_ 0x24 #define OBDII_MODE01_OXYGEN_SENSOR2_ 0x25 #define OBDII_MODE01_OXYGEN_SENSOR3_ 0x26 #define OBDII_MODE01_OXYGEN_SENSOR4_ 0x27 #define OBDII_MODE01_OXYGEN_SENSOR5_ 0x28 #define OBDII_MODE01_OXYGEN_SENSOR6_ 0x29 #define OBDII_MODE01_OXYGEN_SENSOR7_ 0x2A #define OBDII_MODE01_OXYGEN_SENSOR8_ 0x2B #define OBDII_MODE01_COMMANDED_EGR 0x2C #define OBDII_MODE01_EGR_ERROR 0x2D #define OBDII_MODE01_COMMANDED_EVAP_PURGE 0x2E #define OBDII_MODE01_FUEL_TANK_LEVEL 0x2F #define OBDII_MODE01_WARM_UPS_SINCE_CLEAR 0x30 #define OBDII_MODE01_DISTANCE_TRAVELED_SINCE_CODES_CLEAR 0x31 #define OBDII_MODE01_EVAP_SYSTEM_VAPOR_PRESSURE 0x32 #define OBDII_MODE01_ABSOLUTE_BAROMETRIC_PRESSURE 0x33 #define OBDII_MODE01_OXYGEN_SENSOR1_A 0x34 #define OBDII_MODE01_OXYGEN_SENSOR2_A 0x35 #define OBDII_MODE01_OXYGEN_SENSOR3_A 0x36 #define OBDII_MODE01_OXYGEN_SENSOR4_A 0x37 #define OBDII_MODE01_OXYGEN_SENSOR5_A 0x38 #define OBDII_MODE01_OXYGEN_SENSOR6_A 0x39 #define OBDII_MODE01_OXYGEN_SENSOR7_A 0x3A #define OBDII_MODE01_OXYGEN_SENSOR8_A 0x3B #define OBDII_MODE01_CATALYST_TEMP11 0x3C #define OBDII_MODE01_CATALYST_TEMP21 0x3D #define OBDII_MODE01_CATALYST_TEMP12 0x3E #define OBDII_MODE01_CATALYST_TEMP22 0x3F #define OBDII_MODE01_PIDS_SUPPORT40 0x40 #define OBDII_MODE01_CONTROL_MODULE_VOLTAGE 0x42 #define OBDII_MODE01_ABSOLUTE_LOAD_VALUE 0x43 #define OBDII_MODE01_FUEL_AIR_COMMANDED_EQUIV_RATIO 0x44 #define OBDII_MODE01_RELATIVE_THROTTLE_POSITION 0x45 #define OBDII_MODE01_AMBIENT_AIR_TEMP 0x46 #define OBDII_MODE01_ABSOLUTE_THROTTLE_POSITION_B 0x47 #define OBDII_MODE01_ABSOLUTE_THROTTLE_POSITION_C 0x48 #define OBDII_MODE01_ACCELERATOR_PEDAL_POSITION_D 0x49 #define OBDII_MODE01_ACCELERATOR_PEDAL_POSITION_E 0x4A #define OBDII_MODE01_ACCELERATOR_PEDAL_POSITION_F 0x4B #define OBDII_MODE01_COMMANDED_THROTTLE_ACTUATOR 0x4C #define OBDII_MODE01_TIME_RUN_WITH_MIL 0x4D #define OBDII_MODE01_TIME_SINCE_TROUBLE_CODES_CLEAR 0x4E #define OBDII_MODE01_FUEL_TYPE 0x51 #define OBDII_MODE01_ETHANOL_FUEL 0x52 #define OBDII_MODE01_ABSOLUTE_EVAP_SYSTEM_VAPOR_PRESSURE 0x53 #define OBDII_MODE01_SHORT_TERM_OXYGEN_BANK13 0x55 #define OBDII_MODE01_LONG_TERM_OXYGEN_BANK13 0x56 #define OBDII_MODE01_SHORT_TERM_OXYGEN_BANK24 0x57 #define OBDII_MODE01_LONG_TERM_OXYGEN_BANK24 0x58 #define OBDII_MODE01_FUEL_RAIL_ABSOLUTE_PRESSURE 0x59 #define OBDII_MODE01_RELATIVE_ACCELERATOR_PEDAL_POSITION 0x5A #define OBDII_MODE01_HYBRID_BATTERY_REMAINING_LIFE 0x5B #define OBDII_MODE01_ENGINE_OIL_TEMP 0x5C #define OBDII_MODE01_FUEL_INJECTION_TIMING 0x5D #define OBDII_MODE01_ENGINE_FUEL_RATE 0x5E #define OBDII_MODE01_PIDS_SUPPORT60 0x60 #define OBDII_MODE01_TORQUE_DRIVER_DEMAND_ENGINE 0x61 #define OBDII_MODE01_TORQUE_ACTUAL_ENGINE 0x62 #define OBDII_MODE01_TORQUE_REFERENCE_ENGINE 0x63 #define OBDII_MODE01_PIDS_SUPPORT80 0x80 #define OBDII_MODE01_PIDS_SUPPORTA0 0xA0 #define OBDII_MODE01_PIDS_SUPPORTC0 0xC0 #define OBDII_MODE09_PIDS_SUPPORT00 0x00 #define OBDII_MODE09_VIN02 0x02 #define OBDII_MODE09_CALIBRATION_ID04 0x04 #define OBDII_MODE09_CAL_VER_NUMBERS06 0x06 #define OBDII_MODE09_PERFORMANCE_SPARK08 0x08 #define OBDII_MODE09_ECU_NAME0A 0x0A #define OBDII_MODE09_PERFORMANCE_COMPRESSION0B 0x0B /* unit_name_string for OBDII_MODE01_TIMING_ADVANCE */ static const unit_name_string units_degree_btdc = { UTF8_DEGREE_SIGN "BTDC", NULL }; /* value_string[] for OBDII_MODE01_FUEL_SYSTEM_STATUS */ static const value_string obdii_fuel_system_status_vals[] = { { 1, "Open loop due to insufficient engine temperature" }, { 2, "Closed loop, using oxygen sensor feedback to determine fuel mix" }, { 4, "Open loop due to engine load OR fuel cut due to deceleration" }, { 8, "Open loop due to system failure" }, { 16, "Closed loop, using at least one oxygen sensor but there is a fault in the feedback system" }, { 0, NULL } }; /* value_string[] for OBDII_MODE01_SECONDARY_AIR_STATUS */ static const value_string obdii_secondary_air_status_vals[] = { { 1, "Upstream" }, { 2, "Downstream of catalytic converter" }, { 4, "From the outside atmosphere or off" }, { 8, "Pump commanded on for diagnostics" }, { 0, NULL } }; /* value_string[] for OBDII_MODE01_OBD_STANDARDS */ static const value_string obdii_standards_vals[] = { { 1, "OBD-II as defined by the CARB" }, { 2, "OBD as defined by the EPA" }, { 3, "OBD and OBD-II" }, { 4, "OBD-I" }, { 5, "Not OBD compliant" }, { 6, "EOBD" }, { 7, "EOBD and OBD-II" }, { 8, "EOBD and OBD" }, { 9, "EOBD, OBD and OBD II" }, { 10, "JOBD" }, { 11, "JOBD and OBD II" }, { 12, "JOBD and EOBD" }, { 13, "JOBD, EOBD, and OBD II" }, { 14, "Reserved" }, { 15, "Reserved" }, { 16, "Reserved" }, { 17, "EMD" }, { 18, "EMD+" }, { 19, "HD OBD-C" }, { 20, "HD OBD" }, { 21, "WWH OBD" }, { 22, "Reserved" }, { 23, "HD EOBD-I" }, { 24, "HD EOBD-I N" }, { 25, "HD EOBD-II" }, { 26, "HD EOBD-II N" }, { 27, "Reserved" }, { 28, "OBDBr-1" }, { 29, "OBDBr-2" }, { 30, "KOBD" }, { 31, "IOBD I" }, { 32, "IOBD II" }, { 33, "HD EOBD-IV" }, /* 34-250 Reserved */ /* 251-255 Not available for assignment (SAE J1939 special meaning) */ { 0, NULL} }; /* value_string[] for OBDII_MODE01_FUEL_TYPE */ static const value_string obdii_fuel_type_coding_vals[] = { { 0, "Not available" }, { 1, "Gasoline" }, { 2, "Methanol" }, { 3, "Ethanol" }, { 4, "Diesel" }, { 5, "LPG" }, { 6, "CNG" }, { 7, "Propane" }, { 8, "Electric" }, { 9, "Bifuel running Gasoline" }, { 10, "Bifuel running Methanol" }, { 11, "Bifuel running Ethanol" }, { 12, "Bifuel running LPG" }, { 13, "Bifuel running CNG" }, { 14, "Bifuel running Propane" }, { 15, "Bifuel running Electricity" }, { 16, "Bifuel running electric and combustion engine" }, { 17, "Hybrid gasoline" }, { 18, "Hybrid Ethanol" }, { 19, "Hybrid Diesel" }, { 20, "Hybrid Electric" }, { 21, "Hybrid running electric and combustion engine" }, { 22, "Hybrid Regenerative" }, { 23, "Bifuel running diesel" }, { 0, NULL } }; static const value_string obdii_mode01_pid_vals[] = { { OBDII_MODE01_PIDS_SUPPORT00, "PIDs supported [01 - 20]" }, { OBDII_MODE01_MONITOR_STATUS, "Monitor status" }, { OBDII_MODE01_FREEZE_DTC, "Freeze DTC" }, { OBDII_MODE01_FUEL_SYSTEM_STATUS, "Fuel system status" }, { OBDII_MODE01_ENGINE_LOAD, "Calculated engine load" }, { OBDII_MODE01_ENGINE_COOLANT_TEMP, "Engine coolant temperature" }, { OBDII_MODE01_SHORT_TERM_FUEL_BANK1, "Short term fuel trim (Bank 1)" }, { OBDII_MODE01_LONG_TERM_FUEL_BANK1, "Long term fuel trim (Bank 1)" }, { OBDII_MODE01_SHORT_TERM_FUEL_BANK2, "Short term fuel trim (Bank 2)" }, { OBDII_MODE01_LONG_TERM_FUEL_BANK2, "Long term fuel trim (Bank 2)" }, { OBDII_MODE01_FUEL_PRESSURE, "Fuel pressure" }, { OBDII_MODE01_INTAKE_MANIFOLD_ABSOLUTE_PRESSURE, "Intake manifold absolute pressure" }, { OBDII_MODE01_ENGINE_RPM, "Engine RPM" }, { OBDII_MODE01_VEHICLE_SPEED, "Vehicle speed" }, { OBDII_MODE01_TIMING_ADVANCE, "Timing advance" }, { OBDII_MODE01_INTAKE_AIR_TEMP, "Intake air temperature" }, { OBDII_MODE01_MAF_AIR_FLOW_RATE, "MAF air flow rate" }, { OBDII_MODE01_THROTTLE_POSITION, "Throttle position" }, { OBDII_MODE01_SECONDARY_AIR_STATUS, "Commanded secondary air status" }, { OBDII_MODE01_OXYGEN_SENSOR_PRESET2, "Oxygen sensors present (2 banks)" }, { OBDII_MODE01_OXYGEN_SENSOR1, "Oxygen Sensor 1" }, { OBDII_MODE01_OXYGEN_SENSOR2, "Oxygen Sensor 2" }, { OBDII_MODE01_OXYGEN_SENSOR3, "Oxygen Sensor 3" }, { OBDII_MODE01_OXYGEN_SENSOR4, "Oxygen Sensor 4" }, { OBDII_MODE01_OXYGEN_SENSOR5, "Oxygen Sensor 5" }, { OBDII_MODE01_OXYGEN_SENSOR6, "Oxygen Sensor 6" }, { OBDII_MODE01_OXYGEN_SENSOR7, "Oxygen Sensor 7" }, { OBDII_MODE01_OXYGEN_SENSOR8, "Oxygen Sensor 8" }, { OBDII_MODE01_OBD_STANDARDS, "OBD standards" }, { OBDII_MODE01_OXYGEN_SENSOR_PRESET4, "Oxygen sensors present (4 banks)" }, { OBDII_MODE01_AUX_INPUT_STATUS, "Auxiliary input status" }, { OBDII_MODE01_ENGINE_UPTIME, "Run time since engine start" }, { OBDII_MODE01_PIDS_SUPPORT20, "PIDs supported [21 - 40]" }, { OBDII_MODE01_DISTANCE_TRAVELED_WITH_MIL, "Distance traveled with MIL on" }, { OBDII_MODE01_FUEL_RAIL_PRESSURE, "Fuel Rail Pressure" }, { OBDII_MODE01_FUEL_RAIL_GAUGE_PRESSURE, "Fuel Rail Gauge Pressure" }, { OBDII_MODE01_OXYGEN_SENSOR1_, "Oxygen Sensor 1" }, { OBDII_MODE01_OXYGEN_SENSOR2_, "Oxygen Sensor 2" }, { OBDII_MODE01_OXYGEN_SENSOR3_, "Oxygen Sensor 3" }, { OBDII_MODE01_OXYGEN_SENSOR4_, "Oxygen Sensor 4" }, { OBDII_MODE01_OXYGEN_SENSOR5_, "Oxygen Sensor 5" }, { OBDII_MODE01_OXYGEN_SENSOR6_, "Oxygen Sensor 6" }, { OBDII_MODE01_OXYGEN_SENSOR7_, "Oxygen Sensor 7" }, { OBDII_MODE01_OXYGEN_SENSOR8_, "Oxygen Sensor 8" }, { OBDII_MODE01_COMMANDED_EGR, "Commanded EGR" }, { OBDII_MODE01_EGR_ERROR, "EGR Error" }, { OBDII_MODE01_COMMANDED_EVAP_PURGE, "Commanded evaporative purge" }, { OBDII_MODE01_FUEL_TANK_LEVEL, "Fuel Tank Level Input" }, { OBDII_MODE01_WARM_UPS_SINCE_CLEAR, "Warm-ups since codes cleared" }, { OBDII_MODE01_DISTANCE_TRAVELED_SINCE_CODES_CLEAR, "Distance traveled since codes cleared" }, { OBDII_MODE01_EVAP_SYSTEM_VAPOR_PRESSURE, "Evap. System Vapor Pressure" }, { OBDII_MODE01_ABSOLUTE_BAROMETRIC_PRESSURE, "Absolute Barometric Pressure" }, { OBDII_MODE01_OXYGEN_SENSOR1_A, "Oxygen Sensor 1" }, { OBDII_MODE01_OXYGEN_SENSOR2_A, "Oxygen Sensor 2" }, { OBDII_MODE01_OXYGEN_SENSOR3_A, "Oxygen Sensor 3" }, { OBDII_MODE01_OXYGEN_SENSOR4_A, "Oxygen Sensor 4" }, { OBDII_MODE01_OXYGEN_SENSOR5_A, "Oxygen Sensor 5" }, { OBDII_MODE01_OXYGEN_SENSOR6_A, "Oxygen Sensor 6" }, { OBDII_MODE01_OXYGEN_SENSOR7_A, "Oxygen Sensor 7" }, { OBDII_MODE01_OXYGEN_SENSOR8_A, "Oxygen Sensor 8" }, { OBDII_MODE01_CATALYST_TEMP11, "Catalyst Temperature (Bank 1, Sensor 1)" }, { OBDII_MODE01_CATALYST_TEMP21, "Catalyst Temperature (Bank 2, Sensor 1)" }, { OBDII_MODE01_CATALYST_TEMP12, "Catalyst Temperature (Bank 1, Sensor 2)" }, { OBDII_MODE01_CATALYST_TEMP22, "Catalyst Temperature (Bank 2, Sensor 2)" }, { OBDII_MODE01_PIDS_SUPPORT40, "PIDs supported [41 - 60]" }, { 0x41, "Monitor status this cycle" }, { OBDII_MODE01_CONTROL_MODULE_VOLTAGE, "Control module voltage" }, { OBDII_MODE01_ABSOLUTE_LOAD_VALUE, "Absolute load value" }, { OBDII_MODE01_FUEL_AIR_COMMANDED_EQUIV_RATIO, "Fuel-Air commanded equivalence ratio" }, { OBDII_MODE01_RELATIVE_THROTTLE_POSITION, "Relative throttle position" }, { OBDII_MODE01_AMBIENT_AIR_TEMP, "Ambient air temperature" }, { OBDII_MODE01_ABSOLUTE_THROTTLE_POSITION_B, "Absolute throttle position B" }, { OBDII_MODE01_ABSOLUTE_THROTTLE_POSITION_C, "Absolute throttle position C" }, { OBDII_MODE01_ACCELERATOR_PEDAL_POSITION_D, "Accelerator pedal position D" }, { OBDII_MODE01_ACCELERATOR_PEDAL_POSITION_E, "Accelerator pedal position E" }, { OBDII_MODE01_ACCELERATOR_PEDAL_POSITION_F, "Accelerator pedal position F" }, { OBDII_MODE01_COMMANDED_THROTTLE_ACTUATOR, "Commanded throttle actuator" }, { OBDII_MODE01_TIME_RUN_WITH_MIL, "Time run with MIL on" }, { OBDII_MODE01_TIME_SINCE_TROUBLE_CODES_CLEAR, "Time since trouble codes cleared" }, { 0x4F, "Maximum value for Fuel-Air equivalence ratio, oxygen sensor voltage, oxygen sensor current, intake manifold absolute pressure" }, { 0x50, "Maximum value for air flow rate from mass air flow sensor" }, { OBDII_MODE01_FUEL_TYPE, "Fuel Type" }, { OBDII_MODE01_ETHANOL_FUEL, "Ethanol fuel %" }, { OBDII_MODE01_ABSOLUTE_EVAP_SYSTEM_VAPOR_PRESSURE, "Absolute Evap system Vapor Pressure" }, { 0x54, "Evap system vapor pressure" }, { OBDII_MODE01_SHORT_TERM_OXYGEN_BANK13, "Short term secondary oxygen sensor trim (Bank 1, 3)" }, { OBDII_MODE01_LONG_TERM_OXYGEN_BANK13, "Long term secondary oxygen sensor trim (Bank 1, 3)" }, { OBDII_MODE01_SHORT_TERM_OXYGEN_BANK24, "Short term secondary oxygen sensor trim (Bank 2, 4)" }, { OBDII_MODE01_LONG_TERM_OXYGEN_BANK24, "Long term secondary oxygen sensor trim (Bank 2, 4)" }, { OBDII_MODE01_FUEL_RAIL_ABSOLUTE_PRESSURE, "Fuel rail absolute pressure" }, { OBDII_MODE01_RELATIVE_ACCELERATOR_PEDAL_POSITION, "Relative accelerator pedal position" }, { OBDII_MODE01_HYBRID_BATTERY_REMAINING_LIFE, "Hybrid battery pack remaining life" }, { OBDII_MODE01_ENGINE_OIL_TEMP, "Engine oil temperature" }, { OBDII_MODE01_FUEL_INJECTION_TIMING, "Fuel injection timing" }, { OBDII_MODE01_ENGINE_FUEL_RATE, "Engine fuel rate" }, { 0x5F, "Emission requirements to which vehicle is designed" }, { OBDII_MODE01_PIDS_SUPPORT60, "PIDs supported [61 - 80]" }, { OBDII_MODE01_TORQUE_DRIVER_DEMAND_ENGINE, "Driver's demand engine - percent torque" }, { OBDII_MODE01_TORQUE_ACTUAL_ENGINE, "Actual engine - percent torque" }, { OBDII_MODE01_TORQUE_REFERENCE_ENGINE, "Engine reference torque" }, { 0x64, "Engine percent torque data" }, { 0x65, "Auxiliary input / output supported" }, { 0x66, "Mass air flow sensor" }, { 0x67, "Engine coolant temperature" }, { 0x68, "Intake air temperature sensor" }, { 0x69, "Commanded EGR and EGR Error" }, { 0x6A, "Commanded Diesel intake air flow control and relative intake air flow position" }, { 0x6B, "Exhaust gas recirculation temperature" }, { 0x6C, "Commanded throttle actuator control and relative throttle position" }, { 0x6D, "Fuel pressure control system" }, { 0x6E, "Injection pressure control system" }, { 0x6F, "Turbocharger compressor inlet pressure" }, { 0x70, "Boost pressure control" }, { 0x71, "Variable Geometry turbo (VGT) control" }, { 0x72, "Wastegate control" }, { 0x73, "Exhaust pressure" }, { 0x74, "Turbocharger RPM" }, { 0x75, "Turbocharger temperature" }, { 0x76, "Turbocharger temperature" }, { 0x77, "Charge air cooler temperature" }, { 0x78, "Exhaust Gas temperature (Bank 1)" }, { 0x79, "Exhaust Gas temperature (Bank 2)" }, { 0x7A, "Diesel particulate filter" }, { 0x7B, "Diesel particulate filter" }, { 0x7C, "Diesel Particulate filter temperature" }, { 0x7D, "NOx Not-To-Exceed control area status" }, { 0x7E, "PM Not-To-Exceed control area status" }, { 0x7F, "Engine run time" }, { OBDII_MODE01_PIDS_SUPPORT80, "PIDs supported [81 - A0]" }, { 0x81, "Engine run time for Auxiliary Emissions Control Device" }, { 0x82, "Engine run time for Auxiliary Emissions Control Device" }, { 0x83, "NOx sensor" }, { 0x84, "Manifold surface temperature" }, { 0x85, "NOx reagent system" }, { 0x86, "Particulate matter sensor" }, { 0x87, "Intake manifold absolute pressure" }, { OBDII_MODE01_PIDS_SUPPORTA0, "PIDs supported [A1 - C0]" }, { OBDII_MODE01_PIDS_SUPPORTC0, "PIDs supported [C1 - E0]" }, { 0x00, NULL } }; static value_string_ext obdii_mode01_pid_vals_ext = VALUE_STRING_EXT_INIT(obdii_mode01_pid_vals); static const value_string obdii_mode09_pid_vals[] = { { OBDII_MODE09_PIDS_SUPPORT00, "PIDs supported [00 - 20]" }, { OBDII_MODE09_VIN02, "Vehicle VIN" }, { OBDII_MODE09_CALIBRATION_ID04, "Calibration ID" }, { OBDII_MODE09_CAL_VER_NUMBERS06, "Calibration Verification Numbers" }, { OBDII_MODE09_PERFORMANCE_SPARK08, "In-use performance tracking for spark ignition vehicles" }, { OBDII_MODE09_ECU_NAME0A, "ECU Name" }, { OBDII_MODE09_PERFORMANCE_COMPRESSION0B, "In-use performance tracking for compression ignition vehicles" }, { 0x00, NULL } }; static value_string_ext obdii_mode09_pid_vals_ext = VALUE_STRING_EXT_INIT(obdii_mode09_pid_vals); static const value_string obdii_mode_vals[] = { { 0x01, "Show current data" }, { 0x02, "Show freeze frame data" }, { 0x03, "Show stored Diagnostic Trouble Codes" }, { 0x04, "Clear Diagnostic Trouble Codes and stored values" }, { 0x05, "Test results, oxygen sensor monitoring (non CAN only)" }, { 0x06, "Test results, other component/system monitoring (Test results, oxygen sensor monitoring for CAN only)" }, { 0x07, "Show pending Diagnostic Trouble Codes (detected during current or last driving cycle)" }, { 0x08, "Control operation of on-board component/system" }, { 0x09, "Request vehicle information" }, { 0x0A, "Permanent Diagnostic Trouble Codes (DTCs) (Cleared DTCs)" }, { 0x00, NULL } }; struct obdii_packet_info { packet_info *pinfo; uint32_t can_id; uint8_t data_bytes; uint8_t mode; uint8_t value_bytes; int value_offset; uint8_t valueA, valueB, valueC, valueD, valueE; }; static bool dissect_obdii_common_temperature(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree, int hf_field) { if (oinfo->value_bytes == 1) { int16_t val = ((int) oinfo->valueA) - 40; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %d " UTF8_DEGREE_SIGN "C", val); proto_tree_add_int(tree, hf_field, tvb, oinfo->value_offset, oinfo->value_bytes, val); return true; } return false; } static bool dissect_obdii_common_percent(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree, int hf_field) { if (oinfo->value_bytes == 1) { double val = (100 * oinfo->valueA) / 255.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.2f %%", val); proto_tree_add_double(tree, hf_field, tvb, oinfo->value_offset, oinfo->value_bytes, val); return true; } return false; } static bool dissect_obdii_common_percent_neg(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree, int hf_field) { if (oinfo->value_bytes == 1) { double val = ((100 * oinfo->valueA) / 128.0) - 100.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.2f %%", val); proto_tree_add_double(tree, hf_field, tvb, oinfo->value_offset, oinfo->value_bytes, val); return true; } return false; } static bool dissect_obdii_common_fuel_rail_pressure(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree, int hf_field) { if (oinfo->value_bytes == 2) { unsigned val = 10 * (256 * oinfo->valueA + oinfo->valueB); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %u kPa", val); proto_tree_add_uint(tree, hf_field, tvb, oinfo->value_offset, oinfo->value_bytes, val); return true; } return false; } static bool dissect_obdii_common_absolute_pressure(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree, int hf_field) { if (oinfo->value_bytes == 1) { uint8_t val = oinfo->valueA; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %u kPa", val); proto_tree_add_uint(tree, hf_field, tvb, oinfo->value_offset, oinfo->value_bytes, val); return true; } return false; } static bool dissect_obdii_common_distance_travelled(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree, int hf_field) { if (oinfo->value_bytes == 2) { uint16_t val = 256 * oinfo->valueA + oinfo->valueB; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %u km", val); proto_tree_add_uint(tree, hf_field, tvb, oinfo->value_offset, oinfo->value_bytes, val); return true; } return false; } static bool dissect_obdii_common_time(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree, int hf_field) { if (oinfo->value_bytes == 2) { uint16_t val = 256 * oinfo->valueA + oinfo->valueB; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %u minutes", val); proto_tree_add_uint(tree, hf_field, tvb, oinfo->value_offset, oinfo->value_bytes, val); return true; } return false; } static bool dissect_obdii_common_torque(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree, int hf_field) { if (oinfo->value_bytes == 1) { int val = ((int) oinfo->valueA) - 125; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %d %%", val); proto_tree_add_int(tree, hf_field, tvb, oinfo->value_offset, oinfo->value_bytes, val); return true; } return false; } static void dissect_obdii_mode_01(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree) { uint8_t pid = tvb_get_uint8(tvb, OBDII_PID_POS); int value_offset; bool handled = false; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, "- %s", val_to_str_ext(pid, &obdii_mode01_pid_vals_ext, "Unknown (%.2x)")); proto_tree_add_uint(tree, hf_obdii_mode01_pid, tvb, OBDII_PID_POS, 1, pid); proto_tree_add_item(tree, hf_obdii_raw_value, tvb, OBDII_VAL_OFF, MIN(oinfo->value_bytes, 4), ENC_NA); value_offset = OBDII_VAL_OFF; oinfo->value_offset = value_offset; /* https://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_01 */ switch (pid) { case OBDII_MODE01_PIDS_SUPPORT00: case OBDII_MODE01_PIDS_SUPPORT20: case OBDII_MODE01_PIDS_SUPPORT40: case OBDII_MODE01_PIDS_SUPPORT60: case OBDII_MODE01_PIDS_SUPPORT80: case OBDII_MODE01_PIDS_SUPPORTA0: case OBDII_MODE01_PIDS_SUPPORTC0: if ((handled = (oinfo->value_bytes == 4))) { uint32_t val = ((oinfo->valueA << 24) | (oinfo->valueB << 16) | (oinfo->valueC << 8) | (oinfo->valueD << 0)); int i; const char *sepa; char bits_str[33]; sepa = ": "; for (i = 31; i >= 0; i--) { unsigned this_pid = (pid + 32 - i); proto_item *ti; memset(bits_str, '.', 32); bits_str[32] = '\0'; if ((val & (1U << i))) { col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, "%s%.2X", sepa, this_pid); ti = proto_tree_add_uint(tree, hf_obdii_mode01_supported_pid, tvb, value_offset, oinfo->value_bytes, this_pid); sepa = ","; bits_str[31 - i] = '1'; } else { ti = proto_tree_add_uint(tree, hf_obdii_mode01_unsupported_pid, tvb, value_offset, oinfo->value_bytes, this_pid); bits_str[31 - i] = '0'; } proto_item_prepend_text(ti, "%s = ", bits_str); } } break; case OBDII_MODE01_FUEL_SYSTEM_STATUS: if ((handled = (oinfo->value_bytes == 2))) { uint8_t fuel_system1_val = oinfo->valueA; uint8_t fuel_system2_val = oinfo->valueB; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": System 1: %s", val_to_str(fuel_system1_val, obdii_fuel_system_status_vals, "Unknown (%.2X)")); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ", System 2: %s", val_to_str(fuel_system2_val, obdii_fuel_system_status_vals, "Unknown (%.2X)")); proto_tree_add_uint(tree, hf_obdii_mode01_fuel_system1_status, tvb, value_offset + 0, 1, fuel_system1_val); proto_tree_add_uint(tree, hf_obdii_mode01_fuel_system2_status, tvb, value_offset + 1, 1, fuel_system2_val); } break; case OBDII_MODE01_ENGINE_LOAD: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_engine_load); break; case OBDII_MODE01_ENGINE_COOLANT_TEMP: handled = dissect_obdii_common_temperature(tvb, oinfo, tree, hf_obdii_mode01_engine_coolant_temp); break; case OBDII_MODE01_SHORT_TERM_FUEL_BANK1: handled = dissect_obdii_common_percent_neg(tvb, oinfo, tree, hf_obdii_mode01_short_term_fuel_bank1); break; case OBDII_MODE01_LONG_TERM_FUEL_BANK1: handled = dissect_obdii_common_percent_neg(tvb, oinfo, tree, hf_obdii_mode01_long_term_fuel_bank1); break; case OBDII_MODE01_SHORT_TERM_FUEL_BANK2: handled = dissect_obdii_common_percent_neg(tvb, oinfo, tree, hf_obdii_mode01_short_term_fuel_bank2); break; case OBDII_MODE01_LONG_TERM_FUEL_BANK2: handled = dissect_obdii_common_percent_neg(tvb, oinfo, tree, hf_obdii_mode01_long_term_fuel_bank2); break; case OBDII_MODE01_FUEL_PRESSURE: if ((handled = (oinfo->value_bytes == 1))) { uint16_t val = 3 * oinfo->valueA; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %u kPa", val); proto_tree_add_uint(tree, hf_obdii_mode01_fuel_pressure, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_ENGINE_RPM: if ((handled = (oinfo->value_bytes == 2))) { double val = (256 * oinfo->valueA + oinfo->valueB) / 4.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.2f rpm", val); proto_tree_add_double(tree, hf_obdii_mode01_engine_rpm, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_VEHICLE_SPEED: if ((handled = (oinfo->value_bytes == 1))) { uint8_t val = oinfo->valueA; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %u km/h", val); proto_tree_add_uint(tree, hf_obdii_mode01_vehicle_speed, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_TIMING_ADVANCE: if ((handled = (oinfo->value_bytes == 1))) { double val = (oinfo->valueA - 128) / 2.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.2f " UTF8_DEGREE_SIGN "BTDC", val); proto_tree_add_double(tree, hf_obdii_mode01_timing_advance, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_INTAKE_AIR_TEMP: handled = dissect_obdii_common_temperature(tvb, oinfo, tree, hf_obdii_mode01_intake_air_temp); break; case OBDII_MODE01_MAF_AIR_FLOW_RATE: if ((handled = (oinfo->value_bytes == 2))) { double val = (256 * oinfo->valueA + oinfo->valueB) / 100.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.2f g/s", val); proto_tree_add_double(tree, hf_obdii_mode01_maf_air_flow_rate, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_THROTTLE_POSITION: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_throttle_position); break; case OBDII_MODE01_SECONDARY_AIR_STATUS: if ((handled = (oinfo->value_bytes == 1))) { uint8_t air_status = oinfo->valueA; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %s", val_to_str(air_status, obdii_secondary_air_status_vals, "Unknown (%.2X)")); proto_tree_add_uint(tree, hf_obdii_mode01_secondary_air_status, tvb, value_offset, oinfo->value_bytes, air_status); } break; case OBDII_MODE01_OXYGEN_SENSOR_PRESET2: if ((handled = (oinfo->value_bytes == 1))) { uint8_t bank1_sensor1 = (oinfo->valueA & (1 << 0)); uint8_t bank1_sensor2 = (oinfo->valueA & (1 << 1)); uint8_t bank1_sensor3 = (oinfo->valueA & (1 << 2)); uint8_t bank1_sensor4 = (oinfo->valueA & (1 << 3)); uint8_t bank2_sensor1 = (oinfo->valueA & (1 << 4)); uint8_t bank2_sensor2 = (oinfo->valueA & (1 << 5)); uint8_t bank2_sensor3 = (oinfo->valueA & (1 << 6)); uint8_t bank2_sensor4 = (oinfo->valueA & (1 << 7)); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": Bank1 sensors: %s%s%s%s%s", bank1_sensor1 ? "1 " : "", bank1_sensor2 ? "2 " : "", bank1_sensor3 ? "3 " : "", bank1_sensor4 ? "4 " : "", ((bank1_sensor1 | bank1_sensor2 | bank1_sensor3 | bank1_sensor4)) ? "" : "None"); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ", Bank2 sensors: %s%s%s%s%s", bank2_sensor1 ? "1 " : "", bank2_sensor2 ? "2 " : "", bank2_sensor3 ? "3 " : "", bank2_sensor4 ? "4 " : "", ((bank2_sensor1 | bank2_sensor2 | bank2_sensor3 | bank2_sensor4)) ? "" : "None"); /* TODO: proto tree */ } break; case OBDII_MODE01_OXYGEN_SENSOR_PRESET4: if ((handled = (oinfo->value_bytes == 1))) { uint8_t bank1_sensor1 = (oinfo->valueA & (1 << 0)); uint8_t bank1_sensor2 = (oinfo->valueA & (1 << 1)); uint8_t bank2_sensor1 = (oinfo->valueA & (1 << 2)); uint8_t bank2_sensor2 = (oinfo->valueA & (1 << 3)); uint8_t bank3_sensor1 = (oinfo->valueA & (1 << 4)); uint8_t bank3_sensor2 = (oinfo->valueA & (1 << 5)); uint8_t bank4_sensor1 = (oinfo->valueA & (1 << 6)); uint8_t bank4_sensor2 = (oinfo->valueA & (1 << 7)); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": Bank1 sensors: %s%s%s", bank1_sensor1 ? "1 " : "", bank1_sensor2 ? "2 " : "", ((bank1_sensor1 | bank1_sensor2)) ? "" : "None"); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ", Bank2 sensors: %s%s%s", bank2_sensor1 ? "1 " : "", bank2_sensor2 ? "2 " : "", ((bank2_sensor1 | bank2_sensor2)) ? "" : "None"); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ", Bank3 sensors: %s%s%s", bank3_sensor1 ? "1 " : "", bank3_sensor2 ? "2 " : "", ((bank3_sensor1 | bank3_sensor2)) ? "" : "None"); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ", Bank4 sensors: %s%s%s", bank4_sensor1 ? "1 " : "", bank4_sensor2 ? "2 " : "", ((bank4_sensor1 | bank4_sensor2)) ? "" : "None"); /* TODO: proto tree */ } break; case OBDII_MODE01_OXYGEN_SENSOR1: case OBDII_MODE01_OXYGEN_SENSOR2: case OBDII_MODE01_OXYGEN_SENSOR3: case OBDII_MODE01_OXYGEN_SENSOR4: case OBDII_MODE01_OXYGEN_SENSOR5: case OBDII_MODE01_OXYGEN_SENSOR6: case OBDII_MODE01_OXYGEN_SENSOR7: case OBDII_MODE01_OXYGEN_SENSOR8: if ((handled = (oinfo->value_bytes == 2))) { double volt_val = (oinfo->valueA) / 200.0; double fuel_trim = ((100.0 * oinfo->valueB) / 128.0) - 100.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": Voltage: %.3f V", volt_val); if (oinfo->valueB != 0xFF) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ", Short term fuel trim: %.2f %%", fuel_trim); proto_tree_add_uint(tree, hf_obdii_mode01_oxygen_sensor_id, tvb, value_offset, oinfo->value_bytes, 1 + (pid - OBDII_MODE01_OXYGEN_SENSOR1)); proto_tree_add_double(tree, hf_obdii_mode01_oxygen_sensor_voltage, tvb, value_offset, 1, volt_val); /* TODO: proto_tree */ } break; case OBDII_MODE01_OBD_STANDARDS: if ((handled = (oinfo->value_bytes == 1))) { uint8_t val = oinfo->valueA; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %s", val_to_str(val, obdii_standards_vals, "Unknown (%u)")); proto_tree_add_uint(tree, hf_obdii_mode01_obd_standards, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_ENGINE_UPTIME: if ((handled = (oinfo->value_bytes == 2))) { uint16_t val = 256 * oinfo->valueA + oinfo->valueB; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %u s", val); proto_tree_add_uint(tree, hf_obdii_mode01_engine_uptime, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_FUEL_RAIL_PRESSURE: if ((handled = (oinfo->value_bytes == 2))) { double val = 0.079 * (256 * oinfo->valueA + oinfo->valueB); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.3f kPa", val); proto_tree_add_double(tree, hf_obdii_mode01_fuel_rail_pressure, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_FUEL_RAIL_GAUGE_PRESSURE: handled = dissect_obdii_common_fuel_rail_pressure(tvb, oinfo, tree, hf_obdii_mode01_fuel_rail_gauge_pressure); break; case OBDII_MODE01_FUEL_RAIL_ABSOLUTE_PRESSURE: handled = dissect_obdii_common_fuel_rail_pressure(tvb, oinfo, tree, hf_obdii_mode01_fuel_rail_absolute_pressure); break; case OBDII_MODE01_OXYGEN_SENSOR1_: case OBDII_MODE01_OXYGEN_SENSOR2_: case OBDII_MODE01_OXYGEN_SENSOR3_: case OBDII_MODE01_OXYGEN_SENSOR4_: case OBDII_MODE01_OXYGEN_SENSOR5_: case OBDII_MODE01_OXYGEN_SENSOR6_: case OBDII_MODE01_OXYGEN_SENSOR7_: case OBDII_MODE01_OXYGEN_SENSOR8_: if ((handled = (oinfo->value_bytes == 4))) { double fuel_air_ratio = (256 * oinfo->valueA + oinfo->valueB) * (2.0 / 65536.0); double volt_val = (256 * oinfo->valueC + oinfo->valueD) * (8.0 / 65536.0); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": Fuel-Air Equivalence: %.4f ratio", fuel_air_ratio); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ", Voltage: %.4f V", volt_val); proto_tree_add_uint(tree, hf_obdii_mode01_oxygen_sensor_id, tvb, value_offset, oinfo->value_bytes, 1 + (pid - OBDII_MODE01_OXYGEN_SENSOR1_)); proto_tree_add_double(tree, hf_obdii_mode01_oxygen_sensor_fuel_air_ratio, tvb, value_offset, 2, fuel_air_ratio); proto_tree_add_double(tree, hf_obdii_mode01_oxygen_sensor_voltage, tvb, value_offset + 2, 2, volt_val); } break; case OBDII_MODE01_COMMANDED_EGR: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_commanded_egr); break; case OBDII_MODE01_EGR_ERROR: handled = dissect_obdii_common_percent_neg(tvb, oinfo, tree, hf_obdii_mode01_egr_error); break; case OBDII_MODE01_COMMANDED_EVAP_PURGE: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_commanded_evap_purge); break; case OBDII_MODE01_FUEL_TANK_LEVEL: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_fuel_tank_level_input); break; case OBDII_MODE01_WARM_UPS_SINCE_CLEAR: if ((handled = (oinfo->value_bytes == 1))) { uint8_t val = oinfo->valueA; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %u", val); proto_tree_add_uint(tree, hf_obdii_mode01_warm_ups, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_EVAP_SYSTEM_VAPOR_PRESSURE: if ((handled = (oinfo->value_bytes == 2))) { double val = ((int16_t) (oinfo->valueA * 256 + oinfo->valueB)) / 4.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.2f kPa", val); proto_tree_add_double(tree, hf_obdii_mode01_evap_system_vapor_pressure, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_ABSOLUTE_BAROMETRIC_PRESSURE: handled = dissect_obdii_common_absolute_pressure(tvb, oinfo, tree, hf_obdii_mode01_absolute_barometric_pressure); break; case OBDII_MODE01_INTAKE_MANIFOLD_ABSOLUTE_PRESSURE: handled = dissect_obdii_common_absolute_pressure(tvb, oinfo, tree, hf_obdii_mode01_intake_manifold_absolute_pressure); break; case OBDII_MODE01_OXYGEN_SENSOR1_A: case OBDII_MODE01_OXYGEN_SENSOR2_A: case OBDII_MODE01_OXYGEN_SENSOR3_A: case OBDII_MODE01_OXYGEN_SENSOR4_A: case OBDII_MODE01_OXYGEN_SENSOR5_A: case OBDII_MODE01_OXYGEN_SENSOR6_A: case OBDII_MODE01_OXYGEN_SENSOR7_A: case OBDII_MODE01_OXYGEN_SENSOR8_A: if ((handled = (oinfo->value_bytes == 4))) { double fuel_air_ratio = (256 * oinfo->valueA + oinfo->valueB) * (2.0 / 65536.0); double current_val = (((int) oinfo->valueC) - 128) + (oinfo->valueD / 256.0); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": Fuel-Air Equivalence: %.4f ratio", fuel_air_ratio); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ", Current: %.4f mA", current_val); proto_tree_add_uint(tree, hf_obdii_mode01_oxygen_sensor_id, tvb, value_offset, oinfo->value_bytes, 1 + (pid - OBDII_MODE01_OXYGEN_SENSOR1_A)); proto_tree_add_double(tree, hf_obdii_mode01_oxygen_sensor_fuel_air_ratio, tvb, value_offset, 2, fuel_air_ratio); proto_tree_add_double(tree, hf_obdii_mode01_oxygen_sensor_current, tvb, value_offset + 2, 2, current_val); } break; case OBDII_MODE01_CATALYST_TEMP11: case OBDII_MODE01_CATALYST_TEMP21: case OBDII_MODE01_CATALYST_TEMP12: case OBDII_MODE01_CATALYST_TEMP22: if ((handled = (oinfo->value_bytes == 2))) { int hf_field = (pid == OBDII_MODE01_CATALYST_TEMP11) ? hf_obdii_mode01_catalyst_temp_11 : (pid == OBDII_MODE01_CATALYST_TEMP21) ? hf_obdii_mode01_catalyst_temp_21 : (pid == OBDII_MODE01_CATALYST_TEMP12) ? hf_obdii_mode01_catalyst_temp_12 : (pid == OBDII_MODE01_CATALYST_TEMP22) ? hf_obdii_mode01_catalyst_temp_22 : -1; double val = ((256 * oinfo->valueA + oinfo->valueB) / 10.0) - 40.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.2f " UTF8_DEGREE_SIGN "C", val); proto_tree_add_double(tree, hf_field, tvb, oinfo->value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_CONTROL_MODULE_VOLTAGE: if ((handled = (oinfo->value_bytes == 2))) { double val = (256 * oinfo->valueA + oinfo->valueB) / 1000.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.3f V", val); proto_tree_add_double(tree, hf_obdii_mode01_control_module_voltage, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_ABSOLUTE_LOAD_VALUE: if ((handled = (oinfo->value_bytes == 2))) { double val = ((256 * oinfo->valueA + oinfo->valueB) * 100) / 255.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.3f %%", val); proto_tree_add_double(tree, hf_obdii_mode01_absolute_load_value, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_FUEL_AIR_COMMANDED_EQUIV_RATIO: if ((handled = (oinfo->value_bytes == 2))) { double val = (256 * oinfo->valueA + oinfo->valueB) * (2.0 / 65536.0); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.3f", val); proto_tree_add_double(tree, hf_obdii_mode01_fuel_air_commanded_equiv_ratio, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_RELATIVE_THROTTLE_POSITION: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_relative_throttle_position); break; case OBDII_MODE01_AMBIENT_AIR_TEMP: handled = dissect_obdii_common_temperature(tvb, oinfo, tree, hf_obdii_mode01_ambient_air_temp); break; case OBDII_MODE01_ABSOLUTE_THROTTLE_POSITION_B: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_absolute_throttle_position_B); break; case OBDII_MODE01_ABSOLUTE_THROTTLE_POSITION_C: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_absolute_throttle_position_C); break; case OBDII_MODE01_ACCELERATOR_PEDAL_POSITION_D: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_accelerator_pedal_position_D); break; case OBDII_MODE01_ACCELERATOR_PEDAL_POSITION_E: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_accelerator_pedal_position_E); break; case OBDII_MODE01_ACCELERATOR_PEDAL_POSITION_F: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_accelerator_pedal_position_F); break; case OBDII_MODE01_COMMANDED_THROTTLE_ACTUATOR: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_commanded_throttle_actuator); break; case OBDII_MODE01_DISTANCE_TRAVELED_WITH_MIL: handled = dissect_obdii_common_distance_travelled(tvb, oinfo, tree, hf_obdii_mode01_distance_traveled_with_mil); break; case OBDII_MODE01_DISTANCE_TRAVELED_SINCE_CODES_CLEAR: handled = dissect_obdii_common_distance_travelled(tvb, oinfo, tree, hf_obdii_mode01_distance_traveled_since_code_clear); break; case OBDII_MODE01_TIME_RUN_WITH_MIL: handled = dissect_obdii_common_time(tvb, oinfo, tree, hf_obdii_mode01_time_run_with_mil); break; case OBDII_MODE01_TIME_SINCE_TROUBLE_CODES_CLEAR: handled = dissect_obdii_common_time(tvb, oinfo, tree, hf_obdii_mode01_time_since_trouble_code_clear); break; case OBDII_MODE01_FUEL_TYPE: if ((handled = (oinfo->value_bytes == 1))) { uint8_t val = oinfo->valueA; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %s", val_to_str(val, obdii_fuel_type_coding_vals, "Unknown (%u)")); proto_tree_add_uint(tree, hf_obdii_mode01_fuel_type, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_ETHANOL_FUEL: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_ethanol_fuel); break; case OBDII_MODE01_ABSOLUTE_EVAP_SYSTEM_VAPOR_PRESSURE: if ((handled = (oinfo->value_bytes == 2))) { double val = (oinfo->valueA * 256 + oinfo->valueB) / 200.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.2f kPa", val); proto_tree_add_double(tree, hf_obdii_mode01_absolute_evap_system_vapor_pressure, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_SHORT_TERM_OXYGEN_BANK13: case OBDII_MODE01_LONG_TERM_OXYGEN_BANK13: case OBDII_MODE01_SHORT_TERM_OXYGEN_BANK24: case OBDII_MODE01_LONG_TERM_OXYGEN_BANK24: if ((handled = (oinfo->value_bytes == 2))) { double bankA_val = ((100.0 * oinfo->valueA) / 128.0) - 100.0; double bankB_val = ((100.0 * oinfo->valueB) / 128.0) - 100.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": { %.2f %%, %.2f %% }", bankA_val, bankB_val); /* TODO: proto tree */ } break; case OBDII_MODE01_RELATIVE_ACCELERATOR_PEDAL_POSITION: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_relative_accelerator_pedal_position); break; case OBDII_MODE01_HYBRID_BATTERY_REMAINING_LIFE: handled = dissect_obdii_common_percent(tvb, oinfo, tree, hf_obdii_mode01_hybrid_battery_remaining_life); break; case OBDII_MODE01_ENGINE_OIL_TEMP: handled = dissect_obdii_common_temperature(tvb, oinfo, tree, hf_obdii_mode01_engine_oil_temp); break; case OBDII_MODE01_FUEL_INJECTION_TIMING: if ((handled = (oinfo->value_bytes == 2))) { double val = ((256 * oinfo->valueA + oinfo->valueB - (210 * 128)) / 128.0); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.3f " UTF8_DEGREE_SIGN, val); proto_tree_add_double(tree, hf_obdii_mode01_fuel_injection_timing, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_ENGINE_FUEL_RATE: if ((handled = (oinfo->value_bytes == 2))) { double val = (256 * oinfo->valueA + oinfo->valueB) / 20.0; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %.3f L/h", val); proto_tree_add_double(tree, hf_obdii_mode01_engine_fuel_rate, tvb, value_offset, oinfo->value_bytes, val); } break; case OBDII_MODE01_TORQUE_DRIVER_DEMAND_ENGINE: handled = dissect_obdii_common_torque(tvb, oinfo, tree, hf_obdii_mode01_torque_driver_demand_engine); break; case OBDII_MODE01_TORQUE_ACTUAL_ENGINE: handled = dissect_obdii_common_torque(tvb, oinfo, tree, hf_obdii_mode01_torque_actual_engine); break; case OBDII_MODE01_TORQUE_REFERENCE_ENGINE: if ((handled = (oinfo->value_bytes == 2))) { uint16_t val = 256 * oinfo->valueA + oinfo->valueB; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, ": %u Nm", val); proto_tree_add_uint(tree, hf_obdii_mode01_torque_reference_engine, tvb, value_offset, oinfo->value_bytes, val); } break; } if (!handled) { /* display raw */ col_append_str(oinfo->pinfo->cinfo, COL_INFO, ": <"); if (oinfo->value_bytes >= 1) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " %.2X", oinfo->valueA); if (oinfo->value_bytes >= 2) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " %.2X", oinfo->valueB); if (oinfo->value_bytes >= 3) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " %.2X", oinfo->valueC); if (oinfo->value_bytes >= 4) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " %.2X", oinfo->valueD); col_append_str(oinfo->pinfo->cinfo, COL_INFO, " >"); } } static void dissect_obdii_mode_07(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree) { proto_tree_add_item(tree, hf_obdii_raw_value, tvb, OBDII_MODE07_DATA_OFF, oinfo->value_bytes, ENC_NA); /* display raw */ col_append_str(oinfo->pinfo->cinfo, COL_INFO, ": <"); if (oinfo->value_bytes >= 1) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " %.2X", oinfo->valueA); if (oinfo->value_bytes >= 2) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " %.2X", oinfo->valueB); if (oinfo->value_bytes >= 3) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " %.2X", oinfo->valueC); if (oinfo->value_bytes >= 4) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " %.2X", oinfo->valueD); if (oinfo->value_bytes >= 5) col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " %.2X", oinfo->valueE); col_append_str(oinfo->pinfo->cinfo, COL_INFO, " >"); } static void dissect_obdii_mode_09(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree) { uint8_t pid = tvb_get_uint8(tvb, OBDII_PID_POS); int value_offset; col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, "- %s", val_to_str_ext(pid, &obdii_mode09_pid_vals_ext, "Unknown (%.2x)")); proto_tree_add_uint(tree, hf_obdii_mode09_pid, tvb, OBDII_PID_POS, 1, pid); value_offset = OBDII_VAL_OFF; oinfo->value_offset = value_offset; switch (pid) { case OBDII_MODE09_PIDS_SUPPORT00: proto_tree_add_item(tree, hf_obdii_raw_value, tvb, OBDII_VAL_OFF, oinfo->value_bytes, ENC_NA); break; case OBDII_MODE09_VIN02: proto_tree_add_item(tree, hf_obdii_vin, tvb, OBDII_VAL_OFF+1, oinfo->value_bytes-1, ENC_ASCII); break; case OBDII_MODE09_CALIBRATION_ID04: case OBDII_MODE09_CAL_VER_NUMBERS06: case OBDII_MODE09_PERFORMANCE_SPARK08: proto_tree_add_item(tree, hf_obdii_raw_value, tvb, OBDII_VAL_OFF, oinfo->value_bytes, ENC_NA); break; case OBDII_MODE09_ECU_NAME0A: proto_tree_add_item(tree, hf_obdii_ecu_name, tvb, OBDII_VAL_OFF+1, oinfo->value_bytes-1, ENC_ASCII); break; case OBDII_MODE09_PERFORMANCE_COMPRESSION0B: default: proto_tree_add_item(tree, hf_obdii_raw_value, tvb, OBDII_VAL_OFF, oinfo->value_bytes, ENC_NA); break; } } static int dissect_obdii_query(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree) { uint16_t pid; int pid_len; const char *mode_str; const char *pid_str; pid_len = oinfo->data_bytes - 1; if (pid_len == 0) { if (oinfo->mode != 0x04 && oinfo->mode != 0x07) return 0; pid = 0; /* Should never be required but set to satisfy petri-dish */ } else if (pid_len == 1) pid = tvb_get_uint8(tvb, OBDII_PID_POS); else if (pid_len == 2) pid = tvb_get_ntohs(tvb, OBDII_PID_POS); else return 0; mode_str = val_to_str(oinfo->mode, obdii_mode_vals, "Unknown (%.2x)"); switch (oinfo->mode) { case 0x01: pid_str = val_to_str_ext(pid, &obdii_mode01_pid_vals_ext, "Unknown (%.2x)"); proto_tree_add_uint(tree, hf_obdii_mode01_pid, tvb, OBDII_PID_POS, pid_len, pid); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " Request[%.3x] %s - %s", oinfo->can_id, mode_str, pid_str); break; case 0x04: case 0x07: col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " Request[%.3x] %s", oinfo->can_id, mode_str); break; case 0x09: pid_str = val_to_str_ext(pid, &obdii_mode09_pid_vals_ext, "Unknown (%.2x)"); proto_tree_add_uint(tree, hf_obdii_mode09_pid, tvb, OBDII_PID_POS, pid_len, pid); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " Request[%.3x] %s - %s", oinfo->can_id, mode_str, pid_str); break; default: pid_str = wmem_strdup_printf(wmem_packet_scope(), "Unknown (%.2x)", pid); col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, " Request[%.3x] %s - %s", oinfo->can_id, mode_str, pid_str); break; } return tvb_captured_length(tvb); } static int dissect_obdii_response(tvbuff_t *tvb, struct obdii_packet_info *oinfo, proto_tree *tree) { col_append_fstr(oinfo->pinfo->cinfo, COL_INFO, "Response[%.3x] %s ", oinfo->can_id, val_to_str(oinfo->mode, obdii_mode_vals, "Unknown (%.2x)")); if (oinfo->mode == 0x04 && oinfo->data_bytes == 0x01) { return tvb_captured_length(tvb); } oinfo->value_bytes = oinfo->data_bytes - OBDII_VAL_OFF; if (oinfo->value_bytes >= 1) oinfo->valueA = tvb_get_uint8(tvb, OBDII_VAL_OFF); if (oinfo->value_bytes >= 2) oinfo->valueB = tvb_get_uint8(tvb, OBDII_VAL_OFF + 1); if (oinfo->value_bytes >= 3) oinfo->valueC = tvb_get_uint8(tvb, OBDII_VAL_OFF + 2); if (oinfo->value_bytes >= 4) oinfo->valueD = tvb_get_uint8(tvb, OBDII_VAL_OFF + 3); if (oinfo->value_bytes >= 5) oinfo->valueE = tvb_get_uint8(tvb, OBDII_VAL_OFF + 4); switch (oinfo->mode) { case 0x01: dissect_obdii_mode_01(tvb, oinfo, tree); break; case 0x07: dissect_obdii_mode_07(tvb, oinfo, tree); break; case 0x09: dissect_obdii_mode_09(tvb, oinfo, tree); } return tvb_captured_length(tvb); } static int dissect_obdii_iso15765(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { iso15765_info_t iso15765_info; uint32_t can_id_only; struct obdii_packet_info oinfo; proto_tree *obdii_tree; proto_item *ti; uint8_t data_bytes; uint8_t mode; bool id_is_query; bool id_is_response; DISSECTOR_ASSERT(data); iso15765_info = *((iso15765_info_t *) data); if (iso15765_info.bus_type != ISO15765_TYPE_CAN && iso15765_info.bus_type != ISO15765_TYPE_CAN_FD) { return 0; } can_id_only = iso15765_info.id & CAN_EFF_MASK; /* If we're using 29bit extended ID's then use extended ID parameters */ if (iso15765_info.id & CAN_EFF_FLAG) { id_is_query = (can_id_only == ODBII_CAN_QUERY_ID_EFF); id_is_response = ((((can_id_only & ~ODBII_CAN_RESPONSE_ID_LOWER_MASK_EFF) ^ ODBII_CAN_RESPONSE_ID_LOWER_MIN_EFF) == 0) || (((can_id_only & ~ODBII_CAN_RESPONSE_ID_UPPER_MASK_EFF) ^ ODBII_CAN_RESPONSE_ID_UPPER_MIN_EFF) == 0)) ? 1 : 0; } else { id_is_query = (can_id_only == ODBII_CAN_QUERY_ID_SFF); id_is_response = ((((can_id_only & ~ODBII_CAN_RESPONSE_ID_LOWER_MASK_SFF) ^ ODBII_CAN_RESPONSE_ID_LOWER_MIN_SFF) == 0) || (((can_id_only & ~ODBII_CAN_RESPONSE_ID_UPPER_MASK_SFF) ^ ODBII_CAN_RESPONSE_ID_UPPER_MIN_SFF) == 0)); } /* validate */ if (iso15765_info.id & (CAN_ERR_FLAG | CAN_RTR_FLAG)) return 0; if (!(id_is_query || id_is_response)) return 0; data_bytes = tvb_reported_length(tvb); mode = tvb_get_uint8(tvb, OBDII_MODE_POS); /* Mode 7 is a datalength of 1, all other queries either 2 or 3 bytes */ if (id_is_query) { if (iso15765_info.len != 8) expert_add_info(pinfo, NULL, &ei_obdii_padding); if (data_bytes == 0 || data_bytes > 3) return 0; if (mode > 0x0a) return 0; } if (id_is_response) { if (mode != 0x44 && data_bytes < 2) return 0; if (mode < 0x40) return 0; mode -= 0x40; } col_set_str(pinfo->cinfo, COL_PROTOCOL, "OBD-II"); col_clear(pinfo->cinfo, COL_INFO); ti = proto_tree_add_item(tree, proto_obdii, tvb, 0, -1, ENC_NA); obdii_tree = proto_item_add_subtree(ti, ett_obdii); proto_tree_add_uint(obdii_tree, hf_obdii_mode, tvb, OBDII_MODE_POS, 1, mode); memset(&oinfo, 0, sizeof(oinfo)); oinfo.pinfo = pinfo; oinfo.can_id = can_id_only; oinfo.data_bytes = data_bytes; oinfo.mode = mode; if (id_is_query) return dissect_obdii_query(tvb, &oinfo, obdii_tree); if (id_is_response) return dissect_obdii_response(tvb, &oinfo, obdii_tree); /* never here */ DISSECTOR_ASSERT_NOT_REACHED(); return tvb_captured_length(tvb); } static int dissect_obdii_uds(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { struct obdii_packet_info oinfo; proto_tree *obdii_tree; proto_item *ti; uint8_t data_bytes; uint8_t mode; bool response; data_bytes = tvb_reported_length(tvb); mode = tvb_get_uint8(tvb, OBDII_MODE_POS); response = (mode & 0x40) == 0x40; mode = mode & 0xbf; col_set_str(pinfo->cinfo, COL_PROTOCOL, "OBD-II"); col_clear(pinfo->cinfo, COL_INFO); ti = proto_tree_add_item(tree, proto_obdii, tvb, 0, -1, ENC_NA); obdii_tree = proto_item_add_subtree(ti, ett_obdii); proto_tree_add_uint(obdii_tree, hf_obdii_mode, tvb, OBDII_MODE_POS, 1, mode); memset(&oinfo, 0, sizeof(oinfo)); oinfo.pinfo = pinfo; oinfo.can_id = 0; oinfo.data_bytes = data_bytes; oinfo.mode = mode; if (!response) { return dissect_obdii_query(tvb, &oinfo, obdii_tree); } else { return dissect_obdii_response(tvb, &oinfo, obdii_tree); } /* never here */ DISSECTOR_ASSERT_NOT_REACHED(); return tvb_captured_length(tvb); } static bool dissect_obdii_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { return dissect_obdii_iso15765(tvb, pinfo, tree, data) != 0; } void proto_register_obdii(void) { static hf_register_info hf[] = { { &hf_obdii_mode, { "Mode", "obd-ii.mode", FT_UINT8, BASE_HEX, VALS(obdii_mode_vals), 0x0, NULL, HFILL }, }, { &hf_obdii_raw_value, { "Raw value", "obd-ii.raw_value", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_pid, { "PID", "obd-ii.mode01_pid", FT_UINT16, BASE_HEX | BASE_EXT_STRING, VALS_EXT_PTR(&obdii_mode01_pid_vals_ext), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_supported_pid, { "Supported PID", "obd-ii.mode01_supported_pid", FT_UINT8, BASE_HEX | BASE_EXT_STRING, VALS_EXT_PTR(&obdii_mode01_pid_vals_ext), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_unsupported_pid, { "NOT Supported PID", "obd-ii.mode01_unsupported_pid", FT_UINT8, BASE_HEX | BASE_EXT_STRING, VALS_EXT_PTR(&obdii_mode01_pid_vals_ext), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_fuel_system1_status, { "Fuel system 1 status", "obd-ii.mode01_fuel_system1_status", FT_UINT8, BASE_HEX, VALS(obdii_fuel_system_status_vals), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_fuel_system2_status, { "Fuel system 2 status", "obd-ii.mode01_fuel_system2_status", FT_UINT8, BASE_HEX, VALS(obdii_fuel_system_status_vals), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_engine_load, { "Calculated engine load", "obd-ii.mode01_engine_load", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_engine_coolant_temp, { "Engine coolant temperature", "obd-ii.mode01_engine_coolant_temp", FT_INT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_degree_celsius), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_short_term_fuel_bank1, { "Short term fuel trim (Bank 1)", "obd-ii.mode01_short_term_fuel_bank1", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_short_term_fuel_bank2, { "Short term fuel trim (Bank 2)", "obd-ii.mode01_short_term_fuel_bank2", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_long_term_fuel_bank1, { "Long term fuel trim (Bank 1)", "obd-ii.mode01_long_term_fuel_bank1", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_long_term_fuel_bank2, { "Long term fuel trim (Bank 2)", "obd-ii.mode01_long_term_fuel_bank2", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_fuel_pressure, { "Fuel pressure", "obd-ii.mode01_fuel_pressure", FT_UINT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_kilopascal), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_engine_rpm, { "Engine RPM", "obd-ii.mode01_engine_rpm", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_revolutions_per_minute), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_vehicle_speed, { "Vehicle Speed", "obd-ii.mode01_vehicle_speed", FT_UINT8, BASE_DEC | BASE_UNIT_STRING, UNS(&units_kmh), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_timing_advance, { "Timing advance", "obd-ii.mode01_timing_advance", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_degree_btdc), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_intake_air_temp, { "Intake air temperature", "obd-ii.mode01_intake_air_temp", FT_INT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_degree_celsius), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_maf_air_flow_rate, { "MAF air flow rate", "obd-ii.mode01_maf_air_flow_rate", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_grams_per_second), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_throttle_position, { "Throttle position", "obd-ii.mode01_throttle_position", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_secondary_air_status, { "Commanded secondary air status", "obd-ii.mode01_secondary_air_status", FT_UINT8, BASE_HEX, VALS(obdii_secondary_air_status_vals), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_obd_standards, { "OBD Standards", "obd-ii.mode01_obd_standards", FT_UINT8, BASE_DEC, VALS(obdii_standards_vals), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_engine_uptime, { "Run time since engine start", "obd-ii.mode01_engine_uptime", FT_UINT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_seconds), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_fuel_rail_pressure, { "Fuel Rail Pressure", "obd-ii.mode01_fuel_rail_pressure", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_kilopascal), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_fuel_rail_gauge_pressure, { "Fuel Rail Gauge Pressure", "obd-ii.mode01_fuel_rail_gauge_pressure", FT_UINT24, BASE_DEC | BASE_UNIT_STRING, UNS(&units_kilopascal), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_fuel_rail_absolute_pressure, { "Fuel rail absolute pressure", "obd-ii.mode01_fuel_rail_absolute_pressure", FT_UINT24, BASE_DEC | BASE_UNIT_STRING, UNS(&units_kilopascal), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_commanded_egr, { "Commanded EGR", "obd-ii.mode01_commanded_egr", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_egr_error, { "EGR Error", "obd-ii.mode01_egr_error", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_commanded_evap_purge, { "Commanded evaporative purge", "obd-ii.mode01_commanded_evap_purge", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_fuel_tank_level_input, { "Fuel Tank Level Input", "obd-ii.mode01_fuel_tank_level_input", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_warm_ups, { "Warm-ups since codes cleared", "obd-ii.mode01_warm_ups", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_obdii_mode01_evap_system_vapor_pressure, { "Evap. System Vapor Pressure", "obd-ii.mode01_evap_system_vapor_pressure", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_kilopascal), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_absolute_barometric_pressure, { "Absolute Barometric Pressure", "obd-ii.mode01_absolute_barometric_pressure", FT_UINT8, BASE_DEC | BASE_UNIT_STRING, UNS(&units_kilopascal), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_intake_manifold_absolute_pressure, { "Intake manifold absolute pressure", "obd-ii.mode01_intake_manifold_absolute_pressure", FT_UINT8, BASE_DEC | BASE_UNIT_STRING, UNS(&units_kilopascal), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_oxygen_sensor_id, { "Oxygen Sensor ID", "obd-ii.mode01_oxygen_sensor_id", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_obdii_mode01_oxygen_sensor_fuel_air_ratio, { "Fuel-Air Equivalence Ratio", "obd-ii.mode01_oxygen_sensor_fuel_air_ratio", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_obdii_mode01_oxygen_sensor_voltage, { "Voltage", "obd-ii.mode01_oxygen_sensor_voltage", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_volt), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_oxygen_sensor_current, { "Current", "obd-ii.mode01_oxygen_sensor_current", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_milliamps), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_distance_traveled_with_mil, { "Distance traveled with MIL on", "obd-ii.mode01_distance_traveled_with_mil", FT_UINT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_km), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_distance_traveled_since_code_clear, { "Distance traveled since codes cleared", "obd-ii.mode01_distance_traveled_since_code_clear", FT_UINT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_km), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_time_run_with_mil, { "Time run with MIL on", "obd-ii.mode01_time_run_with_mil", FT_UINT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_minute_minutes), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_time_since_trouble_code_clear, { "Time since trouble codes cleared", "obd-ii.mode01_time_since_trouble_code_clear", FT_UINT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_minute_minutes), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_fuel_type, { "Fuel type", "obd-ii.mode01_fuel_type", FT_UINT8, BASE_DEC, VALS(obdii_fuel_type_coding_vals), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_control_module_voltage, { "Control module voltage", "obd-ii.mode01_control_module_voltage", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_volt), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_absolute_load_value, { "Absolute load value", "obd-ii.mode01_absolute_load_value", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_fuel_air_commanded_equiv_ratio, { "Fuel-Air commanded equivalence ratio", "obd-ii.mode01_fuel_air_commanded_equiv_ratio", FT_DOUBLE, BASE_NONE, NULL, 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_relative_throttle_position, { "Relative throttle position", "obd-ii.mode01_relative_throttle_position", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_catalyst_temp_11, { "Catalyst Temperature (Bank 1, Sensor 1)", "obd-ii.mode01_catalyst_temp_11", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_degree_celsius), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_catalyst_temp_21, { "Catalyst Temperature (Bank 2, Sensor 1)", "obd-ii.mode01_catalyst_temp_21", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_degree_celsius), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_catalyst_temp_12, { "Catalyst Temperature (Bank 1, Sensor 2)", "obd-ii.mode01_catalyst_temp_12", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_degree_celsius), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_catalyst_temp_22, { "Catalyst Temperature (Bank 2, Sensor 2)", "obd-ii.mode01_catalyst_temp_22", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_degree_celsius), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_ambient_air_temp, { "Ambient air temperature", "obd-ii.mode01_ambient_air_temp", FT_INT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_degree_celsius), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_absolute_throttle_position_B, { "Absolute throttle position B", "obd-ii.mode01_absolute_throttle_position_B", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_absolute_throttle_position_C, { "Absolute throttle position C", "obd-ii.mode01_absolute_throttle_position_C", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_accelerator_pedal_position_D, { "Accelerator pedal position D", "obd-ii.mode01_accelerator_pedal_position_D", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_accelerator_pedal_position_E, { "Accelerator pedal position E", "obd-ii.mode01_accelerator_pedal_position_E", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_accelerator_pedal_position_F, { "Accelerator pedal position F", "obd-ii.mode01_accelerator_pedal_position_F", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_commanded_throttle_actuator, { "Commanded throttle actuator", "obd-ii.mode01_commanded_throttle_actuator", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_ethanol_fuel, { "Ethanol fuel %", "obd-ii.mode01_ethanol_fuel", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_absolute_evap_system_vapor_pressure, { "Absolute Evap system Vapor Pressure", "obd-ii.mode01_absolute_evap_system_vapor_pressure", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_kilopascal), 0x0, NULL, HFILL } }, { &hf_obdii_mode01_relative_accelerator_pedal_position, { "Relative accelerator pedal position", "obd-ii.mode01_relative_accelerator_pedal_position", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_hybrid_battery_remaining_life, { "Hybrid battery pack remaining life", "obd-ii.mode01_hybrid_battery_remaining_life", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_engine_oil_temp, { "Engine oil temperature", "obd-ii.mode01_engine_oil_temp", FT_INT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_degree_celsius), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_fuel_injection_timing, { "Fuel injection timing", "obd-ii.mode01_fuel_injection_timing", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_degree_degrees), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_engine_fuel_rate, { "Engine fuel rate", "obd-ii.mode01_engine_fuel_rate", FT_DOUBLE, BASE_NONE | BASE_UNIT_STRING, UNS(&units_liter_per_hour), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_torque_driver_demand_engine, { "Driver's demand engine - percent torque", "obd-ii.mode01_torque_driver_demand_engine", FT_INT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_torque_actual_engine, { "Actual engine - percent torque", "obd-ii.mode01_torque_actual_engine", FT_INT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_percent), 0x0, NULL, HFILL }, }, { &hf_obdii_mode01_torque_reference_engine, { "Engine reference torque", "obd-ii.mode01_torque_reference_engine", FT_UINT16, BASE_DEC | BASE_UNIT_STRING, UNS(&units_newton_metre), 0x0, NULL, HFILL }, }, { &hf_obdii_mode09_pid, { "PID", "obd-ii.mode09_pid", FT_UINT16, BASE_HEX | BASE_EXT_STRING, VALS_EXT_PTR(&obdii_mode09_pid_vals_ext), 0x0, NULL, HFILL }, }, { &hf_obdii_mode09_supported_pid, { "Supported PID", "obd-ii.mode09_supported_pid", FT_UINT8, BASE_HEX | BASE_EXT_STRING, VALS_EXT_PTR(&obdii_mode09_pid_vals_ext), 0x0, NULL, HFILL }, }, { &hf_obdii_mode09_unsupported_pid, { "NOT Supported PID", "obd-ii.mode09_unsupported_pid", FT_UINT8, BASE_HEX | BASE_EXT_STRING, VALS_EXT_PTR(&obdii_mode09_pid_vals_ext), 0x0, NULL, HFILL }, }, { &hf_obdii_vin, { "VIN", "obd-ii.VIN", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }, }, { &hf_obdii_ecu_name, { "ECU Name", "obd-ii.ecu_name", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }, }, }; static int *ett[] = { &ett_obdii }; struct expert_module *expert_obdii; static ei_register_info obdii_ei[] = { { &ei_obdii_padding, { "obdii.padding", PI_PROTOCOL, PI_WARN, "OBD2 Spec requires 8 byte, zero padded frames. Some tools/ecus may ignore frames that don't follow this rule.", EXPFILL }}, }; proto_obdii = proto_register_protocol("OBD-II PID", "OBD-II", "obd-ii"); proto_register_field_array(proto_obdii, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); expert_obdii = expert_register_protocol(proto_obdii); expert_register_field_array(expert_obdii, obdii_ei, array_length(obdii_ei)); obdii_handle = register_dissector("obd-ii", dissect_obdii_iso15765, proto_obdii); register_dissector("obd-ii-uds", dissect_obdii_uds, proto_obdii); } void proto_reg_handoff_obdii(void) { dissector_add_for_decode_as("iso15765.subdissector", obdii_handle); /* heuristics default off since these standardized IDs might be reused outside automotive systems */ heur_dissector_add("can", dissect_obdii_heur, "OBD-II Heuristic", "obd-ii_can_heur", proto_obdii, HEURISTIC_DISABLE); } /* * Editor modelines - https://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 8 * tab-width: 8 * indent-tabs-mode: t * End: * * vi: set shiftwidth=8 tabstop=8 noexpandtab: * :indentSize=8:tabSize=8:noTabs=false: */