netchan

What netchan is, what it carries, and the limits it accepts on purpose.

The seam that lets one object file run over UDP, a WebSocket, or an encrypted tunnel.

Datagrams, frames, channels, and how a session is established.

A working peer in one file: open a socket, feed netchan, drain what it wants to send.

One connection object per peer, demultiplexed by connection id.

Adding the encrypted transport and an ssh-shaped login to a working session.

Adding your own frame types without breaking a peer that predates them.

The IDL, the tagged wire format, and how a reader skips a field it has never heard of.

Frame layouts, header bits, and the constants that bound the implementation.

Five layers of checking, from unit tests to a fuzzer, and what each one has actually found.

Every function netchan.h declares, generated from the header so it cannot drift from the code.

How a client with no account asks a public server for one, and the single interactive method that carries registration, passwords, and tokens alike.

A beacon packet for the local network, and why anything a meta-server should trust goes over HTTPS instead.