／var／logmarcus chiu

ARP - Packet Format

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  • HardwareType - specifies the type of physical network (ethernet, wifi, etc)
  • ProtocolType - specifies the higher-layer protocol (IP)
  • HLen - hardware address length, specifies length of the link-layer address
  • PLen - protocol address length, specifies length of the higher-layer protocol address
  • Operation - specifies whether this is a request or a response
  • Source and Target hardware (ethernet) and protocol (IP) addresses:
    • length of addresses are specified in the Hlen and Plen fields
    • SourceHardwareAddr (ethernet) - 6 bytes
    • SourceProtocolAddr (ip) - 4 bytes
    • TargetHardwareAddr (ethernet) - 6 bytes
    • TargetProtocolAddr (ip) - 4 bytes