Kasumin plays music using a client-server architecture.
- kasumin is both a library as well an implementation of the server.
- yohane contains the data types used by the server and client
- hoshizora implements basic user interfaces to communicate with the server
The server plays music on the host while the client controls what the server plays. The server supports playing music from a myriad of sources including local files, Spotify via librespot, or YouTube.
Clients are identified by a UUID which the server assigns upon connection. All communication is serialized with MessagePack which follows a small transport that indicates the size of the data being received.
The envelope is pretty simple: kasu:BIG-ENDIAN-U32\r\n
For example, kasu:16\r\n. The u32 is big endian which is also host byte order. Client-server messages are small, so the server checks the data size to avoid DOS attacks.