DLT HV - Scanner

Reads the provided DLT HV log ring buffer and publishes all events as they come in.

Configuration

Json

Under root/elos/Scanner/Plugins add:

"<DltHvScanner Instance name>": {
   "File": "scanner_dlt_hv.so",
   "Run": "always",
   "Config": {
      "DeviceFile": "/dev/shm/test_dlt_shmem",
      "OffsetAddress": "0x1000",
      "BufferSize": 1448,
      "ScanFrequency": 2277,
      "HardwareId": "The machine publishing DLT",
      "Pid": 3,
      "AppId": "The DLT aplication"
   }
}

• DeviceFile: The (memory mapped) file to open for the DLT ring buffer.

• OffsetAddress: The offset address where the buffer starts in the file (default if not provided is 0) Has to be a multiple of the page size of the system its running on. Can be a string encoding the address or a number

• BufferSize: The memory size of the buffer. This is only used to check that the size stated in the buffer header is correct. If a size of 0 is given the check is skiped, this is the default if nothing is configured. Can be a string encoding the size or a number.

• ScanFrequency: The Frequency (in hz) with wich the scanner should wake up and check for new log entries. Default is 2277 hz

• HardwareId: An identifier for the machine publishing the DLT events. Default is the content of “/etc/machine-id”.

• Pid: The pid of the proccess publishing the DLT events. Default is 0 wich disables it.

• AppId: An identifier for the proccess publishing the DLT events.

  Default is the <DltHvScanner Instance name>.

Configuration structure

DltHvScanner
├── File
├── Run
└── Config
    ├── DeviceFile
    ├── OffsetAddress
    ├── BufferSize
    ├── HardwareId
    ├── Pid
    └── AppId