1 #![warn(rust_2018_idioms)]
2 #![cfg(not(target_os = "wasi"))] // Wasi doesn't support UDP
3
4 use tokio::net::UdpSocket;
5 use tokio_stream::StreamExt;
6 use tokio_util::codec::{Decoder, Encoder, LinesCodec};
7 use tokio_util::udp::UdpFramed;
8
9 use bytes::{BufMut, BytesMut};
10 use futures::future::try_join;
11 use futures::future::FutureExt;
12 use futures::sink::SinkExt;
13 use std::io;
14 use std::sync::Arc;
15
16 #[cfg_attr(
17 any(target_os = "macos", target_os = "ios", target_os = "tvos"),
18 allow(unused_assignments)
19 )]
20 #[tokio::test]
send_framed_byte_codec() -> std::io::Result<()>21 async fn send_framed_byte_codec() -> std::io::Result<()> {
22 let mut a_soc = UdpSocket::bind("127.0.0.1:0").await?;
23 let mut b_soc = UdpSocket::bind("127.0.0.1:0").await?;
24
25 let a_addr = a_soc.local_addr()?;
26 let b_addr = b_soc.local_addr()?;
27
28 // test sending & receiving bytes
29 {
30 let mut a = UdpFramed::new(a_soc, ByteCodec);
31 let mut b = UdpFramed::new(b_soc, ByteCodec);
32
33 let msg = b"4567";
34
35 let send = a.send((msg, b_addr));
36 let recv = b.next().map(|e| e.unwrap());
37 let (_, received) = try_join(send, recv).await.unwrap();
38
39 let (data, addr) = received;
40 assert_eq!(msg, &*data);
41 assert_eq!(a_addr, addr);
42
43 a_soc = a.into_inner();
44 b_soc = b.into_inner();
45 }
46
47 #[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "tvos")))]
48 // test sending & receiving an empty message
49 {
50 let mut a = UdpFramed::new(a_soc, ByteCodec);
51 let mut b = UdpFramed::new(b_soc, ByteCodec);
52
53 let msg = b"";
54
55 let send = a.send((msg, b_addr));
56 let recv = b.next().map(|e| e.unwrap());
57 let (_, received) = try_join(send, recv).await.unwrap();
58
59 let (data, addr) = received;
60 assert_eq!(msg, &*data);
61 assert_eq!(a_addr, addr);
62 }
63
64 Ok(())
65 }
66
67 pub struct ByteCodec;
68
69 impl Decoder for ByteCodec {
70 type Item = Vec<u8>;
71 type Error = io::Error;
72
decode(&mut self, buf: &mut BytesMut) -> Result<Option<Vec<u8>>, io::Error>73 fn decode(&mut self, buf: &mut BytesMut) -> Result<Option<Vec<u8>>, io::Error> {
74 let len = buf.len();
75 Ok(Some(buf.split_to(len).to_vec()))
76 }
77 }
78
79 impl Encoder<&[u8]> for ByteCodec {
80 type Error = io::Error;
81
encode(&mut self, data: &[u8], buf: &mut BytesMut) -> Result<(), io::Error>82 fn encode(&mut self, data: &[u8], buf: &mut BytesMut) -> Result<(), io::Error> {
83 buf.reserve(data.len());
84 buf.put_slice(data);
85 Ok(())
86 }
87 }
88
89 #[tokio::test]
send_framed_lines_codec() -> std::io::Result<()>90 async fn send_framed_lines_codec() -> std::io::Result<()> {
91 let a_soc = UdpSocket::bind("127.0.0.1:0").await?;
92 let b_soc = UdpSocket::bind("127.0.0.1:0").await?;
93
94 let a_addr = a_soc.local_addr()?;
95 let b_addr = b_soc.local_addr()?;
96
97 let mut a = UdpFramed::new(a_soc, ByteCodec);
98 let mut b = UdpFramed::new(b_soc, LinesCodec::new());
99
100 let msg = b"1\r\n2\r\n3\r\n".to_vec();
101 a.send((&msg, b_addr)).await?;
102
103 assert_eq!(b.next().await.unwrap().unwrap(), ("1".to_string(), a_addr));
104 assert_eq!(b.next().await.unwrap().unwrap(), ("2".to_string(), a_addr));
105 assert_eq!(b.next().await.unwrap().unwrap(), ("3".to_string(), a_addr));
106
107 Ok(())
108 }
109
110 #[tokio::test]
framed_half() -> std::io::Result<()>111 async fn framed_half() -> std::io::Result<()> {
112 let a_soc = Arc::new(UdpSocket::bind("127.0.0.1:0").await?);
113 let b_soc = a_soc.clone();
114
115 let a_addr = a_soc.local_addr()?;
116 let b_addr = b_soc.local_addr()?;
117
118 let mut a = UdpFramed::new(a_soc, ByteCodec);
119 let mut b = UdpFramed::new(b_soc, LinesCodec::new());
120
121 let msg = b"1\r\n2\r\n3\r\n".to_vec();
122 a.send((&msg, b_addr)).await?;
123
124 let msg = b"4\r\n5\r\n6\r\n".to_vec();
125 a.send((&msg, b_addr)).await?;
126
127 assert_eq!(b.next().await.unwrap().unwrap(), ("1".to_string(), a_addr));
128 assert_eq!(b.next().await.unwrap().unwrap(), ("2".to_string(), a_addr));
129 assert_eq!(b.next().await.unwrap().unwrap(), ("3".to_string(), a_addr));
130
131 assert_eq!(b.next().await.unwrap().unwrap(), ("4".to_string(), a_addr));
132 assert_eq!(b.next().await.unwrap().unwrap(), ("5".to_string(), a_addr));
133 assert_eq!(b.next().await.unwrap().unwrap(), ("6".to_string(), a_addr));
134
135 Ok(())
136 }
137