volans_plaintext/
lib.rs

1use std::{
2    io, iter,
3    pin::Pin,
4    task::{Context, Poll},
5};
6
7use futures::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt, future::BoxFuture};
8use volans_core::{
9    PeerId, UpgradeInfo,
10    identity::{PublicKey, SignatureError},
11    upgrade::{InboundConnectionUpgrade, OutboundConnectionUpgrade},
12};
13
14#[derive(Clone)]
15pub struct Config {
16    local_pubkey: PublicKey,
17}
18
19impl Config {
20    pub fn new(local_pubkey: PublicKey) -> Self {
21        Self { local_pubkey }
22    }
23
24    async fn handshake<T>(self, mut socket: T) -> Result<(PeerId, IdentifyConnection<T>), Error>
25    where
26        T: AsyncRead + AsyncWrite + Send + Unpin + 'static,
27    {
28        socket.write_all(self.local_pubkey.as_bytes()).await?;
29        socket.flush().await?;
30        let mut key_buf = [0; 32];
31        socket.read_exact(&mut key_buf).await?;
32        let remote_key = PublicKey::from_bytes(&key_buf)?;
33        let peer_id = PeerId::from_bytes(remote_key.as_bytes().clone());
34        Ok((peer_id, IdentifyConnection { socket, remote_key }))
35    }
36}
37
38impl UpgradeInfo for Config {
39    type Info = &'static str;
40    type InfoIter = iter::Once<Self::Info>;
41
42    fn protocol_info(&self) -> Self::InfoIter {
43        iter::once("/v1/identify")
44    }
45}
46
47impl<C> InboundConnectionUpgrade<C> for Config
48where
49    C: AsyncRead + AsyncWrite + Send + Unpin + 'static,
50{
51    type Output = (PeerId, IdentifyConnection<C>);
52    type Error = Error;
53    type Future = BoxFuture<'static, Result<Self::Output, Self::Error>>;
54
55    fn upgrade_inbound(self, socket: C, _: Self::Info) -> Self::Future {
56        Box::pin(self.handshake(socket))
57    }
58}
59
60impl<C> OutboundConnectionUpgrade<C> for Config
61where
62    C: AsyncRead + AsyncWrite + Send + Unpin + 'static,
63{
64    type Output = (PeerId, IdentifyConnection<C>);
65    type Error = Error;
66    type Future = BoxFuture<'static, Result<Self::Output, Self::Error>>;
67
68    fn upgrade_outbound(self, socket: C, _: Self::Info) -> Self::Future {
69        Box::pin(self.handshake(socket))
70    }
71}
72
73pub struct IdentifyConnection<S>
74where
75    S: AsyncRead + AsyncWrite + Unpin,
76{
77    pub socket: S,
78    pub remote_key: PublicKey,
79}
80
81#[derive(Debug, thiserror::Error)]
82pub enum Error {
83    #[error("I/O error: {0}")]
84    Io(#[from] io::Error),
85    #[error(transparent)]
86    SignatureError(#[from] SignatureError),
87}
88
89impl<T> AsyncRead for IdentifyConnection<T>
90where
91    T: AsyncRead + AsyncWrite + Unpin,
92{
93    fn poll_read(
94        self: Pin<&mut Self>,
95        cx: &mut Context<'_>,
96        buf: &mut [u8],
97    ) -> Poll<io::Result<usize>> {
98        Pin::new(&mut self.get_mut().socket).poll_read(cx, buf)
99    }
100
101    fn poll_read_vectored(
102        self: Pin<&mut Self>,
103        cx: &mut Context<'_>,
104        bufs: &mut [io::IoSliceMut<'_>],
105    ) -> Poll<io::Result<usize>> {
106        Pin::new(&mut self.get_mut().socket).poll_read_vectored(cx, bufs)
107    }
108}
109
110impl<T> AsyncWrite for IdentifyConnection<T>
111where
112    T: AsyncRead + AsyncWrite + Unpin,
113{
114    fn poll_write(
115        self: Pin<&mut Self>,
116        cx: &mut Context<'_>,
117        buf: &[u8],
118    ) -> Poll<Result<usize, io::Error>> {
119        Pin::new(&mut self.get_mut().socket).poll_write(cx, buf)
120    }
121
122    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
123        Pin::new(&mut self.get_mut().socket).poll_flush(cx)
124    }
125
126    fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), io::Error>> {
127        Pin::new(&mut self.get_mut().socket).poll_close(cx)
128    }
129}
volans_plaintext/lib.rs

volans_plaintext/
lib.rs
