1. CR Kit Packet Formatting
WINLAB
Rutgers University
Date : June
Authors :
Khanh Le,
Prasanthi Maddala,

2. Outline Ethernet Frame, IP/TCP/UDP headers Packet types
Host -> HW : three packet types
RMAP packets (register map read/write)
Data packets
TCP/IP packets
HW -> Host : three packet types
RMAP packets (read data)

3. CR Kit Packet Format Ethernet Header : IP Header :
Board MAC address : fixed value
Host MAC Address : machine dependent e.g. as defined by Ethernet card
IP Header :
Board IP :
Host IP :
UDP for board level communication e.g. RMAP and data packets
HOST -> HW :
UDP port 1000 – RMAP
UDP port 1001 – INTR (not used for Host -> HW)
UDP port 1002 – Data
HW -> HOST :
UDP port 1001 – INTR
TCP for any other applications e.g. ARP, DHCP.
Ex. 1) RMAP packet to HW : UDP src port = 00, UDP dest port = 00
2) Data packets to HW : UDP src port = 02, UDP dest port = 02
3) RMAP packet to HOST: UDP src port = 00, UDP dest port = 00
4) RMAP INTR packet to HOST: UDP src port = 01, UDP dest port = 01
5) Data packet to HOST: UDP src port = 02, UDP dest port = 02

4. Ethernet Frame (source : wikipedia)
802.1Q header is NOT used.
Type II Ethernet Frame format for TCP/IP application.
EtherType = 0x0800 (IPv4), 0x0806 (ARP)
Ethernet payload = bytes

5. EtherType (source : wikipedia)

6. IPv4 packet header 1/3 (source : wikipedia)

7. IPv4 packet header 2/3 (source : wikipedia)

8. IPv4 packet header 3/3 (source : wikipedia)

9. Fragmentation and Reassembly 1/2 (source : wikipedia)

10. Fragmentation and Reassembly 2/2 (source : wikipedia)

11. TCP (source : wikipedia)

12. UDP (source : wikipedia)