Passing structures using sento()

How do I pass following message format from a UDP client to a UDP server? ----------------------------- |Ver|p|fff| length| checksum| ---------------------------- | Customer id | ----------------------------- | Amount | ----------------------------- |other | ----------------------------- how do I write raw data from a structure onto the wire?
If you want reliablility, don't use UDP. Attempts to make UDP reliable basically involve re-implementing TCP, which is not a sensible thing to do.

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