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#![warn(rust_2018_idioms)]
#![cfg(not(target_os = "wasi"))] // Wasi doesn't support UDP
use tokio::net::UdpSocket;
use tokio_stream::StreamExt;
use tokio_util::codec::{Decoder, Encoder, LinesCodec};
use tokio_util::udp::UdpFramed;
use bytes::{BufMut, BytesMut};
use futures::future::try_join;
use futures::future::FutureExt;
use futures::sink::SinkExt;
use std::io;
use std::sync::Arc;
#[cfg_attr(any(target_os = "macos", target_os = "ios"), allow(unused_assignments))]
#[tokio::test]
async fn send_framed_byte_codec() -> std::io::Result<()> {
let mut a_soc = UdpSocket::bind("127.0.0.1:0").await?;
let mut b_soc = UdpSocket::bind("127.0.0.1:0").await?;
let a_addr = a_soc.local_addr()?;
let b_addr = b_soc.local_addr()?;
// test sending & receiving bytes
{
let mut a = UdpFramed::new(a_soc, ByteCodec);
let mut b = UdpFramed::new(b_soc, ByteCodec);
let msg = b"4567";
let send = a.send((msg, b_addr));
let recv = b.next().map(|e| e.unwrap());
let (_, received) = try_join(send, recv).await.unwrap();
let (data, addr) = received;
assert_eq!(msg, &*data);
assert_eq!(a_addr, addr);
a_soc = a.into_inner();
b_soc = b.into_inner();
}
#[cfg(not(any(target_os = "macos", target_os = "ios")))]
// test sending & receiving an empty message
{
let mut a = UdpFramed::new(a_soc, ByteCodec);
let mut b = UdpFramed::new(b_soc, ByteCodec);
let msg = b"";
let send = a.send((msg, b_addr));
let recv = b.next().map(|e| e.unwrap());
let (_, received) = try_join(send, recv).await.unwrap();
let (data, addr) = received;
assert_eq!(msg, &*data);
assert_eq!(a_addr, addr);
}
Ok(())
}
pub struct ByteCodec;
impl Decoder for ByteCodec {
type Item = Vec<u8>;
type Error = io::Error;
fn decode(&mut self, buf: &mut BytesMut) -> Result<Option<Vec<u8>>, io::Error> {
let len = buf.len();
Ok(Some(buf.split_to(len).to_vec()))
}
}
impl Encoder<&[u8]> for ByteCodec {
type Error = io::Error;
fn encode(&mut self, data: &[u8], buf: &mut BytesMut) -> Result<(), io::Error> {
buf.reserve(data.len());
buf.put_slice(data);
Ok(())
}
}
#[tokio::test]
async fn send_framed_lines_codec() -> std::io::Result<()> {
let a_soc = UdpSocket::bind("127.0.0.1:0").await?;
let b_soc = UdpSocket::bind("127.0.0.1:0").await?;
let a_addr = a_soc.local_addr()?;
let b_addr = b_soc.local_addr()?;
let mut a = UdpFramed::new(a_soc, ByteCodec);
let mut b = UdpFramed::new(b_soc, LinesCodec::new());
let msg = b"1\r\n2\r\n3\r\n".to_vec();
a.send((&msg, b_addr)).await?;
assert_eq!(b.next().await.unwrap().unwrap(), ("1".to_string(), a_addr));
assert_eq!(b.next().await.unwrap().unwrap(), ("2".to_string(), a_addr));
assert_eq!(b.next().await.unwrap().unwrap(), ("3".to_string(), a_addr));
Ok(())
}
#[tokio::test]
async fn framed_half() -> std::io::Result<()> {
let a_soc = Arc::new(UdpSocket::bind("127.0.0.1:0").await?);
let b_soc = a_soc.clone();
let a_addr = a_soc.local_addr()?;
let b_addr = b_soc.local_addr()?;
let mut a = UdpFramed::new(a_soc, ByteCodec);
let mut b = UdpFramed::new(b_soc, LinesCodec::new());
let msg = b"1\r\n2\r\n3\r\n".to_vec();
a.send((&msg, b_addr)).await?;
let msg = b"4\r\n5\r\n6\r\n".to_vec();
a.send((&msg, b_addr)).await?;
assert_eq!(b.next().await.unwrap().unwrap(), ("1".to_string(), a_addr));
assert_eq!(b.next().await.unwrap().unwrap(), ("2".to_string(), a_addr));
assert_eq!(b.next().await.unwrap().unwrap(), ("3".to_string(), a_addr));
assert_eq!(b.next().await.unwrap().unwrap(), ("4".to_string(), a_addr));
assert_eq!(b.next().await.unwrap().unwrap(), ("5".to_string(), a_addr));
assert_eq!(b.next().await.unwrap().unwrap(), ("6".to_string(), a_addr));
Ok(())
}
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