Question : ICMP header checksum

Hi

I'm trying to build ICMP packet field by field (using Delphi). Everything work fine but the only problem is ICMP header checksum (crc). I have no idea how to calculate crc.
If you have any sugestions please let me know.
Any help will be very appreciate.


Regards

Answer : ICMP header checksum

this should be helpful
http://www.rfc-archive.org/getrfc.php?rfc=1624
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