Need for 'Network Coding' simplified code

[Dav]

do you mean "network" as in communication (TCP/IP or X.25) or "network" as in mathematical graphing and interconnection?

In my case I'm interested in algorithmic implementation simply. There are: server (the source of data), clients (request data) and intermediate machines (process the data packets sent from server towards client in special way: encoding & decoding). All of this must be within a well-defined topology called "butterfly". here is another detail about it (https://www.youtube.com/watch?v=B0ZcAWEvjCA)

Thank you