Most robust way of sending files over TCP?

[_lnu4]

I am looking to make a program that can submit large files over tcp. I don't have any issues with sending the buffers to the server/client. I am just unsure on how to go about sending the file metadata. What would be the best way to transmit the filename, permissions, etc? Thanks.

[pwg]

Why make a new program to submit large files over tcp when rsync already exists?

https://rsync.samba.org/

[_lnu4 → pwg]

Purely educational. I am trying to brush up on my rust.