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use std::{
io::{BufRead, BufReader},
net::{IpAddr, SocketAddr, TcpListener, TcpStream},
};
use anyhow::Result;
use tokio::spawn;
pub struct SmtpServer {
listener: TcpListener,
running: bool,
}
impl SmtpServer {
pub fn new(ip: [u8; 4], port: u16) -> Result<Self> {
Ok(Self {
listener: TcpListener::bind((IpAddr::from(ip), port))?,
running: false,
})
}
// TODO: trap SIGINT to stop server?
pub async fn run(&mut self) -> Result<()> {
self.running = true;
while self.running {
let (stream, addr) = self.listener.accept()?;
let session = SessionHandler {
stream,
addr,
state: SessionState::default(),
};
spawn(session.run());
}
Ok(())
}
}
struct SessionHandler {
stream: TcpStream,
addr: SocketAddr,
state: SessionState,
}
impl SessionHandler {
async fn run(mut self) -> Result<()> {
let mut r = BufReader::new(&self.stream);
let mut buffer = String::new();
loop {
if r.read_line(&mut buffer)? == 0 {
break;
}
log::debug!("Received '{}' from '{}'", buffer.trim(), self.addr);
self.state.apply().await;
buffer.clear();
}
log::info!("Connection closed by {}", self.addr);
Ok(())
}
}
#[derive(Default)]
struct SessionState {}
impl SessionState {
async fn apply(&mut self) {
todo!()
}
}
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