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use std::convert::TryInto;
use std::io::{self, BufReader, ErrorKind, Read};
use std::net::TcpStream;
pub enum MessageBody {
Version(u32),
NewCore(String, Vec<u8>),
Job(u64, Vec<u8>),
}
pub enum Reply {
Version(bool),
NewCore,
Job(i32, Vec<u8>),
}
pub struct RawMessage {
pub typ: u8,
pub id: u64,
pub payload: Vec<u8>,
}
impl RawMessage {
pub fn receive(reader: &mut BufReader<TcpStream>) -> io::Result<Option<Self>> {
let mut header = [0u8; 17];
if let Err(e) = reader.read(&mut header) {
if e.kind() == ErrorKind::UnexpectedEof { return Ok(None); }
else { return Err(e); }
}
let typ = header[0];
let id = u64::from_le_bytes(header[1..9].try_into().unwrap());
let length = usize::from_le_bytes(header[9..17].try_into().unwrap());
let mut payload = Vec::new();
payload.resize(length, 0u8);
if let Err(e) = reader.read(&mut payload) {
if e.kind() == ErrorKind::UnexpectedEof { return Ok(None); }
else { return Err(e); }
}
Ok(Some(Self { typ, id, payload }))
}
}
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