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b. UDP header:
i. Source Port number = “UDP Port” in the “This Unit” portion in the
configuration panel.
ii. Destination Port number = “UDP Port” in the “Dest. Unit” portion in the
configuration panel.
iii. UDP Length = UDP header length + data length. This data length would
be =< “Max Bytes/Pkt” value.
iv. The “Max Bytes/Pkt” field is in the “Configuration Panel.” (See section II
for detail).
v. UDP Check sum = calculated over UDP header and serial data.
c. RS232 Data: this is the serial data received from serial port.
Incoming UDP/IP packet:
a. IP Header: checking on the following fields. Other fields that are not
mentioned are not checked.
i. Total length: must be greater than IP header length and UDP header
length
ii. Flags and Fragment offset: must be “Don’t fragment” and “Last fragment”
iii. Protocol: must be UDP.
iv. IP Header check sum: must be correct
v. Source IP address: must be equal “IP Addr” in the “Dest. Unit” portion in
the configuration panel.
vi. Destination IP address: must be equal “IP Addr” in the “This Unit” portion
in the configuration panel.
b. UDP header: checking on the following fields. Other fields that are not
mentioned are not checked.
i. Source Port number: must be equal “UDP Port” in the “Dest. Unit” portion
in the configuration panel.
ii. Destination Port number: must be equal “UDP Port” in the “This Unit” in
the configuration panel.
iii. UDP Length = UDP header length + data length. The data length has to
be =< 200.
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iv. UDP Check sum: ignored if 0. Otherwise, a checksum calculation is
performed on UDP header and serial data.