ARP Request/Reply

1
ARP Request/Reply

• Can we modify our previous device-driver so it
  will allow us to send and receive raw packets?

2
ARP packet (Type 0x0806)
Ethernet Header
ARP Protocol Header
Data (optional)
14 bytes 28 bytes
3
ARP packet-header
32 bits
Hardware Type
Protocol Type
Hardware Length
Operation (1request, 2reply)
Protocol Length
Sender Hardware Address (upper 4 octets)
Sender Hardware Address (lower 2 octets)
Sender Protocol Address (MSW)
Sender Protocol Address (LSW)
Target Hardware Address (upper 2 octets)
Target Hardware Address (lower 4 octets)
Target Protocol Address
For Ethernet Hardware Type 0x0001, Hardware
Length 0x06 For Internet Protocol Type
0x0800, Protocol Length 0x04
4
ARP request and reply