Module io 

Low-level I/O helpers for the connection handshake.

Functions

read_packet

Reads from read into reader until one whole packet is framed, returning its fixed header and total on-wire length. The packet stays buffered in reader (decode it with PacketReader::decode, then consume it); any bytes read past it remain buffered too, so the same reader can be handed to the steady-state read loop without losing data.

write_packet

Encodes packet into buf (clearing and reusing it), writes it to writer, then flushes.