CAPLfunctionAfdxGetPacketData

AfdxGetPacketData

Valid for: CANoe DE • CANoe:lite DE • CANoe4SW DE • CANoe4SW:lite DE

Function Syntax

long AfdxGetPacketData( long packet, long offset, long length, byte buffer[] );

Description

This function copies the packet content (including protocol header and payload) to a local buffer.

Parameters

• packet: Handle of the message that has been created with AfdxInitPacket or from within a callback.
• offset: This is the offset from the beginning of the Ethernet packet. If this is 0, data is copied starting at byte 0 frame (destination MAC address).
• length: This is the number of bytes to be copied from Ethernet packet to the specified buffer.
• buffer: Buffer in which the requested data are copied. Make sure that the size of the buffer is at least length bytes.

Return Values

• Number of copied data bytes.
• With AfdxGetLastError you can check if the function has been processed successfully.

Example

void OnAfdxRawPacket( long dir, long line, int64 timestamp, long bag, long afdxFlags, long packet )
{
  byte rawdata[8330];
  long packetLength;
  long rxLength;
  long packetHandle;
  long msgId;

  if (afdxFlags & packetIsReassembled) {
    write( "<%NODE_NAME%> OnAfdxRawPacket: packet is JumboPacket --> skip" );
    return; // don't transfer Jumbo-frames
  }
  if (afdxFlags & packetIsFragmented) {
    write( "<%NODE_NAME%> OnAfdxRawPacket: packet is fragmented" );
  }

  rxLength = AfdxGetPacketData( packet, 0 , elCount(rawdata), rawdata );
  write( "<%NODE_NAME%> AfdxGetPacketData has length: %d", rxLength );

  if (rxLength==0) {
    write ("<%NODE_NAME%> Error empty packet-length at timestamp %u", timestamp / 1000);
  }
}