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// -*- coding: utf-8 -*-
//
// Copyright (C) 2024 Michael Büsch <m@bues.ch>
//
// Licensed under the Apache License version 2.0
// or the MIT license, at your option.
// SPDX-License-Identifier: Apache-2.0 OR MIT
use crate::resolver::{resolve, ResMode};
use anyhow::{self as ah, format_err as err, Context as _};
use letmein_proto::{Message, Operation};
use tokio::net::TcpStream;
pub struct Client {
stream: TcpStream,
}
impl Client {
pub async fn new(host: &str, port: u16, mode: ResMode) -> ah::Result<Self> {
let addr = resolve(host, mode).await.context("Resolve host name")?;
let stream = TcpStream::connect((addr, port))
.await
.context("Connect to server")?;
Ok(Self { stream })
}
pub async fn recv_msg(&mut self) -> ah::Result<Option<Message>> {
Message::recv(&mut self.stream).await
}
pub async fn recv_specific_msg(&mut self, expect_operation: Operation) -> ah::Result<Message> {
let reply = self.recv_msg().await.context("Receive knock reply")?;
let Some(reply) = reply else {
return Err(err!("Connection terminated"));
};
if reply.operation() == Operation::GoAway {
return Err(err!("The server rejected the request"));
}
if reply.operation() != expect_operation {
return Err(err!(
"Invalid reply message operation. Expected {:?}, got {:?}",
expect_operation,
reply.operation()
));
}
Ok(reply)
}
pub async fn send_msg(&mut self, msg: Message) -> ah::Result<()> {
msg.send(&mut self.stream).await
}
}
// vim: ts=4 sw=4 expandtab
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