Understanding the UDP Protocol

 

 

 

 

Logged with Wireshark network protocol loger analyzer

http://info.kmtronic.com/wireshark-network-protocol-loger-analyzer.html

 

 

Example UDP packet send from PC to DINo 4 relay board

0000  cf 70 7c e4 8a b8 00 26  18 f9 71 a2 08 00 45 00   .p|....& ..q...E.
0010  00 21 a6 eb 00 00 80 11  fe 12 c0 a8 0a 64 c0 a8   .!...... .....d..
0020  0a 19 30 39 30 39 00 0d  70 2d 31 32 33 34 35      ..0909.. p-12345

 

 

 

DINo MAC address (destination)

HEX: cf 70 7c e4 8a b8

PC MAC address (source)

HEX: 00 26 18 f9 71 a2

 

DINo IP address (destination)

HEX: c0 a8 0a 19 (DEC:192.168.10.25)

PC IP address (source)

HEX: c0 a8 0a 64 (DEC:192.168.10.100)

 

DINo port (destination)

HEX: 30 39 (DEC:12345)

PC port (source)

HEX: 30 39 (DEC:12345)

 

Protocol identificator (UDP)

HEX: 11 (DEC:17)

 

Length

HEX: 00 0d (DEC:13)

 

Data

HEX: 31 32 33 34 35 (DEC:49 50 51 52 53, ASCII: 1 2 3 4 5)

 

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