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ethernetPacket Selectors: <protocol>.byte/word/dword/qword/char/int/long/int64

CAPL Functions » Ethernet » Function Overview » ethernetPacket » Selector byte/word/dword/qword/char/int/long/int64 Valid for: CANoe DE • CANoe4SW DE

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Selectors

  • byte ethernetPacket.<protocol>.Byte(index);
  • word ethernetPacket.<protocol>.Word(index);
  • dword ethernetPacket.<protocol>.DWord(index);
  • qword ethernetPacket.<protocol>.QWord(index);
  • char ethernetPacket.<protocol>.Char(index);
  • int ethernetPacket.<protocol>.Int(index);
  • long ethernetPacket.<protocol>.Long(index);
  • int64 ethernetPacket.<protocol>.Int64(index);

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Description

Access to the payload of a protocol. If index is greater than available data or <protocol> is not contained in the packet, the measurement is stopped with a runtime error. ethernetPacket::protocol::IsAvailable and ethernetPacket::protocol::byteLength can be used to find out if the data is available.

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Parameters

  • Index: Byte offset. Index 0 is the first byte within the payload of the protocol. If index is greater than ethernetPacket.<protocol>.byteLength a runtime error occurs.

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Return Values

Value at specified index.

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Example

on ethernetPacket *
{
  if ((this.udp.IsAvailable()) && (this.udp.byteLength >= 16))
  {
    word val;
    val = this.udp.Word(15);
  }
}
on key '1'
{
  int i;
  ethernetPacket pkt;

  // initialize packet with IPv4 and UDP protocols
  pkt.udp.Init();

  // set IPv4 addresses
  pkt.ipv4.source.ParseAddress("192.168.1.1");
  pkt.ipv4.destination.ParseAddress("192.168.1.255");

  // set UDP ports
  pkt.udp.source = 40001;
  pkt.udp.destination = 40002;

  // set UDP payload
  pkt.udp.ResizeData(10);

  for(i = 0; i < 10; i++)
  {
    pkt.udp.Byte(i) = i;
  }

  // calculate UDP and IPv4 checksum and send Ethernet packet
  pkt.CompletePacket();
  output(pkt);
}