test.rs

//extern crate mio;

use std::net::{TcpListener, TcpStream, Ipv4Addr};
use std::str::FromStr;

fn main() {

    let server = TcpListener::bind("127.0.0.1:13265").unwrap();

    let clientside = TcpStream::connect("127.0.0.1:13265").unwrap();

    let (srvside, addr) = server.accept().unwrap();
  
    println!("Accept reported {:?}", addr);

    println!("Server peer {:?}", srvside.peer_addr());
    println!("Server local {:?}", srvside.local_addr());

    println!("Client peer {:?}", clientside.peer_addr());
    println!("Client local {:?}", clientside.local_addr());
}

 Running `C:\Users\paperspace\Projects\test_mio\target\debug\test_mio.exe`

Accept reported V4(127.0.0.1:52436)
Server peer Ok(V4(127.0.0.1:52436))
Server local Ok(V4(127.0.0.1:13265))
Client peer Ok(V4(127.0.0.1:13265))
Client local Ok(V4(127.0.0.1:52436))