pdl/arp.pdl

// PDL grammar file for arp packet format.

big_endian_packets

// Arp packet for Ethernet and IPv4

packet ArpPacket {
  _fixed_ = 0x01 : 16,          // Hardware type (e.g., 1 for Ethernet)
  _fixed_ = 0x0800 : 16,        // Protocol type (e.g., 0x0800 for IPv4)
  _fixed_ = 0x06 : 8,           // Hardware address length (e.g., 6 for MAC)
  _fixed_ = 0x04 : 8,           // Protocol address length (e.g., 4 for IPv4)
  opcode: 16,                   // Operation (1 for request, 2 for reply)
  sender_hw_addr: 8[6],         // Sender's hardware address
  sender_proto_addr: 8[4],      // Sender's protocol address
  target_hw_addr: 8[6],         // Target's hardware address
  target_proto_addr: 8[4],      // Target's protocol address
}