kcp-sys/examples/udp_client.rs

use std::{sync::Arc, time::Duration};

use kcp_sys::{
    endpoint::*,
    packet_def::{Bytes, BytesMut},
    stream::KcpStream,
};
use tokio::{
    io::{AsyncReadExt, AsyncWriteExt},
    net::UdpSocket,
};

#[tokio::main]
async fn main() {
    let mut endpoint = KcpEndpoint::new();
    endpoint.run().await;

    let (input, mut output) = (endpoint.input_sender(), endpoint.output_receiver().unwrap());

    let udp_socket = Arc::new(UdpSocket::bind("0.0.0.0:54320").await.unwrap());
    udp_socket.connect("127.0.0.1:54321").await.unwrap();

    let udp = udp_socket.clone();
    tokio::spawn(async move {
        while let Some(data) = output.recv().await {
            udp.send(&data.inner()).await.unwrap();
        }
    });

    let udp = udp_socket.clone();
    tokio::spawn(async move {
        loop {
            let mut buf = vec![0; 1024];
            let (size, _) = udp.recv_from(&mut buf).await.unwrap();
            input
                .send(BytesMut::from(&buf[..size]).into())
                .await
                .unwrap();
        }
    });

    loop {
        let conn_id = endpoint
            .connect(Duration::from_secs(1), 0, 0, Bytes::new())
            .await
            .unwrap();

        let mut kcp_stream = KcpStream::new(&endpoint, conn_id).unwrap();
        kcp_stream.write_all(b"hello world").await.unwrap();
        kcp_stream.flush().await.unwrap();

        let mut buf = vec![0; 64 * 1024];
        let size = kcp_stream.read(&mut buf).await.unwrap();

        println!("{}", String::from_utf8_lossy(&buf[..size]));
        tokio::time::sleep(Duration::from_secs(1)).await;
    }
}