Decoded Ethernet/IPv4 ARP packet (RFC 826, 28 bytes).
Hardware addresses (senderHardwareAddress / targetHardwareAddress) are
raw 6-byte arrays; IPv4 protocol addresses (senderProtocolAddress /
targetProtocolAddress) are 32-bit unsigned integers. Use @hertzg/mac
and @hertzg/ip/addressv4 for human-readable conversion.
hardwareType: number
protocolType: number
hardwareAddressLength: number
protocolAddressLength: number
operation: number
senderProtocolAddress: number
targetProtocolAddress: number