002 Rust 网络编程，实现 UDP 服务器和客户端

知识点

源码

服务端

use std::net::UdpSocket;

fn main() -> std::io::Result<()> {
    let socket = UdpSocket::bind("127.0.0.1:8080")?;

    loop {
        let mut buf = [0u8; 1500];
        let (amt, src) = socket.recv_from(&mut buf)?;

        let buf = &mut buf[..amt];
        buf.reverse();
        socket.send_to(buf, &src)?;
    }
}      

客户端

use std::net::UdpSocket;
use std::{io, str};

fn main() -> std::io::Result<()> {
    let socket = UdpSocket::bind("127.0.0.1:8000")?;
    socket.connect("127.0.0.1:8080")?;

    loop {
        let mut input = String::new();
        io::stdin().read_line(&mut input)?;
        socket.send(input.as_bytes())?;

        let mut buffer = [0u8; 1500];
        socket.recv_from(&mut buffer)?;

        println!(
            "recv: {}",
            str::from_utf8(&buffer).expect("Could not write buffer as string")
        );
    }
}