The protocols on the wire are different than what's documented especially for older SMB servers - Windows "released documentation" on some of the protocols because they were being reversed, but the docs are flakey or incomplete.
The actual transfer operations are pretty straightforward, but the negotiation steps are _very_ intricate and the Microsoft docs about the protocols are less than honest at times.
The actual transfer operations are pretty straightforward, but the negotiation steps are _very_ intricate and the Microsoft docs about the protocols are less than honest at times.