1 /*
2 * Copyright 2019 fsyncd, Berlin, Germany.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 use rand::RngCore;
18 use sha2::{Digest, Sha256};
19 use std::io::{Read, Write};
20 use vsock::{get_local_cid, VsockAddr, VsockListener, VsockStream, VMADDR_CID_HOST};
21
22 const TEST_BLOB_SIZE: usize = 1_000_000;
23 const TEST_BLOCK_SIZE: usize = 5_000;
24
25 const SERVER_CID: u32 = 3;
26 const SERVER_PORT: u32 = 8000;
27 const LISTEN_PORT: u32 = 9000;
28
29 /// A simple test for the vsock implementation.
30 /// Generate a large random blob of binary data, and transfer it in chunks over the VsockStream
31 /// interface. The vm enpoint is running a simple echo server, so for each chunk we will read
32 /// it's reply and compute a checksum. Comparing the data sent and received confirms that the
33 /// vsock implementation does not introduce corruption and properly implements the interface
34 /// semantics.
35 #[test]
test_vsock()36 fn test_vsock() {
37 let mut rng = rand::thread_rng();
38 let mut blob: Vec<u8> = vec![];
39 let mut rx_blob = vec![];
40 let mut tx_pos = 0;
41
42 blob.resize(TEST_BLOB_SIZE, 0);
43 rx_blob.resize(TEST_BLOB_SIZE, 0);
44 rng.fill_bytes(&mut blob);
45
46 let mut stream =
47 VsockStream::connect(&VsockAddr::new(SERVER_CID, SERVER_PORT)).expect("connection failed");
48
49 while tx_pos < TEST_BLOB_SIZE {
50 let written_bytes = stream
51 .write(&blob[tx_pos..tx_pos + TEST_BLOCK_SIZE])
52 .expect("write failed");
53 if written_bytes == 0 {
54 panic!("stream unexpectedly closed");
55 }
56
57 let mut rx_pos = tx_pos;
58 while rx_pos < (tx_pos + written_bytes) {
59 let read_bytes = stream.read(&mut rx_blob[rx_pos..]).expect("read failed");
60 if read_bytes == 0 {
61 panic!("stream unexpectedly closed");
62 }
63 rx_pos += read_bytes;
64 }
65
66 tx_pos += written_bytes;
67 }
68
69 let expected = Sha256::digest(&blob);
70 let actual = Sha256::digest(&rx_blob);
71
72 assert_eq!(expected, actual);
73 }
74
75 #[test]
test_get_local_cid()76 fn test_get_local_cid() {
77 assert_eq!(get_local_cid().unwrap(), VMADDR_CID_HOST);
78 }
79
80 #[test]
test_listener_local_addr()81 fn test_listener_local_addr() {
82 let listener = VsockListener::bind(&VsockAddr::new(VMADDR_CID_HOST, LISTEN_PORT)).unwrap();
83
84 let local_addr = listener.local_addr().unwrap();
85 assert_eq!(local_addr.cid(), VMADDR_CID_HOST);
86 assert_eq!(local_addr.port(), LISTEN_PORT);
87 }
88
89 #[test]
test_stream_addresses()90 fn test_stream_addresses() {
91 let stream =
92 VsockStream::connect(&VsockAddr::new(SERVER_CID, SERVER_PORT)).expect("connection failed");
93
94 let local_addr = stream.local_addr().unwrap();
95 // Apparently on some systems a client socket has the host CID, on some it has CID_ANY. Allow
96 // either.
97 assert!([libc::VMADDR_CID_ANY, VMADDR_CID_HOST].contains(&local_addr.cid()));
98
99 let peer_addr = stream.peer_addr().unwrap();
100 assert_eq!(peer_addr.cid(), SERVER_CID);
101 assert_eq!(peer_addr.port(), SERVER_PORT);
102 }
103