MessageDlt
Summary
Represents a DLT (Diagnostics, Logging and Trace protocol) message object.
- Methods
- Properties
- Events
Structure
- class MessageDlt
- append_message(message: MessageDlt)
Lets the user packs several messages into one packet, each appended message will have its own header.
- Parameters
message (
MessageDlt) – The message to append
- capture(filter: Filter = None) MessageDlt
Matches any message with the same protocol.
- Parameters
filter (
Filter) – Filter to use to narrow down packets to capture- Returns
Listens to the bus until a message is received and returns this first message
- Return type
- capture(timeout: int32, filter: Filter = None) MessageDlt
Waits for the first message having the same protocol that the sent message without verify the IP address and the port between send and respond message and return it. A timeout is specified to guarantee that the script can continue if no message is captured in a certain time interval.
- Parameters
- Returns
First message captured from the bus or
Nonein case no message is received.- Return type
- capture_list(timeout: int32, filter: Filter = None) IReadOnlyList[MessageDlt]
Waits for any response having the same protocol that the sent message without verify the IP address and the port between send and respond message and return them all as a list. A timeout is specified to guarantee that the script can continue if no message is received in a certain time interval.
- Parameters
- Returns
List of messages captured from the bus during a given period of time.
- Return type
- close_writer()
Closes the file previously created with
open_writer(file).
- get_all_signals_values() Dictionary[str, int]
Gets a dictionary of all the signal values (name, value).
- Returns
Dictionary of all signals values
- Return type
Dictionary[str,int]
- get_hex_bytes() str
Converts the payload of the message from decimal to hex and outputs it to a string of bytes.
- Returns
Payload of message in hex bytes.
- Return type
- get_payload_interpretation() str
Shows the interpretation of the payload.
- Returns
The payload interpretation of the message.
- Return type
- hex_view() str
Allows to visualize messages in hexadecimal format.
- Returns
Hexadecimal representation of the whole message.
- Return type
- is_segmented() bool
Checks if the message is segmented.
- Returns
Trueif the message is segmented.Falseif not- Return type
- open_writer(file: str, fileFormat: FILEFORMAT or None = None)
Creates a PCAP or PCAPNG file for writing the received messages. If the file already exists, it will be overwritten (old file data will be lost). Use the
store()method to record received messages into the file.- Parameters
file (
str) – Absolute path of the file where the messages will be storedfileFormat (
FILEFORMATor None) – Obsolete, you don't need to specify this argument anymore
- receive() MessageDlt
Matches a response for the used message.
- Returns
Listens to the bus until a message is received and returns this first message
- Return type
- receive(timeout: int32) MessageDlt
Waits for the first response having the IP address destination equals to the IP address source of the sent message and return it. A timeout is specified to guarantee that the script can continue if no message is received in a certain time interval.
- Parameters
timeout (
int32) – Max time in milliseconds to wait for the response.- Returns
First message received from the bus or
Nonein case no message is received.- Return type
- receive_list(timeout: int32) IReadOnlyList[MessageDlt]
Waits for any response having the IP address destination equals to the IP address source of sent message and return them all as a list. A timeout is specified to guarantee that the script can continue if no message is received in a certain time interval.
- Parameters
timeout (
int32) – Max time in milliseconds to wait for the response.- Returns
List of messages received from the bus during a given period of time.
- Return type
- reset_signal_value(signalName: str = None)
Resets the signal value to its default value. If no
signalNameis specified, reset all signals.- Parameters
signalName (
str) – the name of the signal to reset
- send() bool
Sends the message (the one used to call the method) through the Ethernet bus.
- Returns
Returns
Trueif the message is sent successfully. Otherwise, an exception will be thrown.- Return type
- set_all_bytes(all_packet: Array[uint8]) bool
Sets the content of the whole message from Ethernet layer, byte per byte.
- set_signal_value(name: str, value: uint64 or None)
Sets the value of a specific signal to a specific value.
- signal(name: str) SignalValue
Gets a signal by its name.
- Parameters
name (
str) – Desired signal's name- Returns
Signal's value.
- Return type
- start_capture(filter: Filter = None)
Used for online capture(capturing network traffic from an adapter). Used with callback function(on_message_received()) and stop_capture() method.
- Parameters
filter (
Filter) – Filter to use to narrow down packets to capture
- start_capture(file: str, wait_eof: bool, filter: Filter = None)
Used for offline capture(reading packets from pcap or asc file). Used with callback function(on_message_received()) and stop_capture() method.
- start_responding_machine()
With this function, it is possible to simulate an ECU. It captures packets and, for every received message, it calls is_request callback. If it returns
True, then it calls the make_reply callback
- stop_capture()
Stops capturing Ethernet messages, either directly from the bus or from a trace file (depending on the version used to start the capture).
- stop_responding_machine()
Stops the responding machine activated with start_responding_machine.
- store(file: str)
Writes the message into the trace file.
- Parameters
file (
str) – Path of the file where the messages will be stored.
- store()
Writes the message into the trace file opened with
open_writer(file).
- tree_view() str
Gives the tree view of the message.
- Returns
Tree view representation of the message.
- Return type
- @on_capture_start
The event is triggered when the capture of Ethernet messages is started. See start_capture .
- @on_capture_stop
The event is triggered when the capture of Ethernet messages is stopped. See stop_capture .
- @on_message_received(message: MessageDlt)
Event is triggered every time a message is read from the Ethernet bus or a trace file. See start_capture.
- Parameters
message (
MessageDlt) – The message object being handled.
- auto_calculate
Determines which signals are auto calculated.
- Type
- capture_info
General information about the context in which the message was captured from.
Noneif the message was not captured- Type
- ethernet_header
Object containing all the information from the Ethernet header like the source and destination MAC addresses of the message.
- Type
- extended_header
The extended header of the DLT message.
- Type
- frame_number
Number of the frame received, in the context of all the ethernet traffic captured.
- Type
- ip_header
Object containing all the information from the IP header like the source and destination IP addresses of the message.
- Type
- ipv4_header
Object containing all the information from the IPV4 header.
- Type
- ipv6_header
Object containing all the information from the IPV6 header.
- Type
- messages
Messages list.
- Type
- network_protocol
Network Protocol of the message.
- Type
- standard_header
The standard header of the DLT message.
- Type
- transport_header
Object containing all the information from the transport header (usually TCP or UDP) like the source and destination ports.
- Type
- transport_protocol
Object containing all the information from the transport protocol (usually TCP or UDP) like the source and destination ports.
- Type
- vlan_tag
Object containing all VLAN info.
- Type