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/*
* Copyright 2019 fsyncd, Berlin, Germany.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
use rand::RngCore;
use sha2::{Digest, Sha256};
use std::io::{Read, Write};
use vsock::{SockAddr, VsockAddr, VsockStream};
const TEST_BLOB_SIZE: usize = 1_000_000;
const TEST_BLOCK_SIZE: usize = 5_000;
/// A simple test for the vsock implementation.
/// Generate a large random blob of binary data, and transfer it in chunks over the VsockStream
/// interface. The vm enpoint is running a simple echo server, so for each chunk we will read
/// it's reply and compute a checksum. Comparing the data sent and received confirms that the
/// vsock implementation does not introduce corruption and properly implements the interface
/// semantics.
#[test]
fn test_vsock() {
let mut rng = rand::thread_rng();
let mut blob: Vec<u8> = vec![];
let mut rx_blob = vec![];
let mut tx_pos = 0;
blob.resize(TEST_BLOB_SIZE, 0);
rx_blob.resize(TEST_BLOB_SIZE, 0);
rng.fill_bytes(&mut blob);
let mut stream =
VsockStream::connect(&SockAddr::Vsock(VsockAddr::new(3, 8000))).expect("connection failed");
while tx_pos < TEST_BLOB_SIZE {
let written_bytes = stream
.write(&blob[tx_pos..tx_pos + TEST_BLOCK_SIZE])
.expect("write failed");
if written_bytes == 0 {
panic!("stream unexpectedly closed");
}
let mut rx_pos = tx_pos;
while rx_pos < (tx_pos + written_bytes) {
let read_bytes = stream.read(&mut rx_blob[rx_pos..]).expect("read failed");
if read_bytes == 0 {
panic!("stream unexpectedly closed");
}
rx_pos += read_bytes;
}
tx_pos += written_bytes;
}
let expected = Sha256::digest(&blob);
let actual = Sha256::digest(&rx_blob);
assert_eq!(expected, actual);
}
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