hub 0.1.0

tcp/udp hub
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use super::LinkTrait;
use core::fmt;
use std::io;
use std::net::{IpAddr, SocketAddr};
use std::sync::Arc;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::TcpStream;

pub struct TcpClient {
    addr: SocketAddr,
    socket: TcpStream,
    data: [u8; 4096],
}
impl TcpClient {
    pub async fn new(addr: &str, port: u32) -> io::Result<TcpClient> {
        let addr: IpAddr = addr.parse().unwrap();
        let addr: SocketAddr = (addr, port as u16).into();
        let socket = TcpStream::connect(&addr).await?;
        Ok(TcpClient {
            addr,
            socket,
            data: [0; 4096],
        })
    }
}

#[async_trait::async_trait]
impl LinkTrait for TcpClient {
    async fn send(&mut self, msg: &[u8]) -> io::Result<()> {
        self.socket.write_all(msg).await
    }
    async fn recv(&mut self) -> io::Result<Arc<Vec<u8>>> {
        let len = self.socket.read(&mut self.data).await?;
        let data = Arc::new(Vec::from(&self.data[..len]));
        log::info!("{} recv: {:02X?}", self, data);
        Ok(data)
    }
}

impl From<TcpStream> for TcpClient {
    fn from(socket: TcpStream) -> Self {
        Self {
            addr: socket.peer_addr().unwrap(),
            socket,
            data: [0; 4096],
        }
    }
}

impl fmt::Display for TcpClient {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_fmt(format_args!("TcpClient({:?})", self.addr))
    }
}