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/*
* Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8351339
* @summary Verify the intact transmission of the binary payload regardless of its endianness
* @modules java.net.http/jdk.internal.net.http.websocket
* @library /test/lib
* @build DummyWebSocketServer
* jdk.test.lib.Asserts
* @run main WebSocketEndiannessTest
*/
import jdk.internal.net.http.websocket.Frame;
import java.net.http.HttpClient;
import java.net.http.WebSocket;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.List;
import java.util.function.Supplier;
import static java.net.http.HttpClient.Builder.NO_PROXY;
import static java.nio.ByteOrder.BIG_ENDIAN;
import static java.nio.ByteOrder.LITTLE_ENDIAN;
import static jdk.test.lib.Asserts.assertEquals;
import static jdk.test.lib.Asserts.assertEqualsByteArray;
import static jdk.test.lib.Asserts.assertTrue;
public class WebSocketEndiannessTest {
public static void main(String[] args) throws Exception {
assertEndiannessAgnosticTransfer();
assertSuccessfulMasking();
}
private static void assertEndiannessAgnosticTransfer() throws Exception {
Supplier<ByteBuffer> bufferSupplier = () -> ByteBuffer
.wrap(new byte[]{
// 4-byte words
0x00, 0x01, 0x02, 0x03,
0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b,
0x0c, 0x0d, 0x0e, 0x0f,
// 2-byte words
0x10, 0x11,
0x12, 0x13,
0x14, 0x15,
0x16, 0x17,
0x18, 0x19,
0x1a, 0x1b,
0x1c, 0x1d,
0x1e, 0x1f,
// negative ones
-1, -2, -3, 4,
-5, -6
});
assertEndiannessAgnosticTransfer(bufferSupplier.get().order(LITTLE_ENDIAN));
assertEndiannessAgnosticTransfer(bufferSupplier.get().order(BIG_ENDIAN));
}
private static void assertEndiannessAgnosticTransfer(ByteBuffer data) throws Exception {
List<DummyWebSocketServer.DecodedFrame> frames = sendDataAndReadFrames(data);
assertEquals(frames.size(), 1);
DummyWebSocketServer.DecodedFrame frame = frames.getFirst();
assertEquals(frame.opcode(), Frame.Opcode.BINARY);
assertTrue(frame.last());
assertEqualsByteArray(data.array(), frame.data().array());
}
private static List<DummyWebSocketServer.DecodedFrame> sendDataAndReadFrames(ByteBuffer data) throws Exception {
try (var server = new DummyWebSocketServer();
var client = HttpClient.newBuilder().proxy(NO_PROXY).build()) {
server.open();
WebSocket webSocket = client
.newWebSocketBuilder()
.buildAsync(server.getURI(), new WebSocket.Listener() {})
.join();
try {
webSocket.sendBinary(data, true).join();
} finally {
webSocket.abort();
}
return server.readFrames();
}
}
private static void assertSuccessfulMasking() {
assertSuccessfulMasking(LITTLE_ENDIAN, LITTLE_ENDIAN);
assertSuccessfulMasking(LITTLE_ENDIAN, BIG_ENDIAN);
assertSuccessfulMasking(BIG_ENDIAN, LITTLE_ENDIAN);
assertSuccessfulMasking(BIG_ENDIAN, BIG_ENDIAN);
}
private static void assertSuccessfulMasking(ByteOrder srcOrder, ByteOrder dstOrder) {
// Create the masker
Frame.Masker masker = new Frame.Masker()
// `0xB0` and `0xD0` is used instead of `0x0B` and `0x0D` to cover the negative `byte` range:
//
// (byte) 0x0A -> 10
// (byte) 0xB0 -> -80
// (byte) 0x0C -> 12
// (byte) 0xD0 -> -48
.setMask(0x0AB00CD0);
// Perform dummy masking to advance `Frame::offset` 1 byte, and effectively make it non-zero.
// A non-zero `Frame::offset` will trigger `Frame::initVectorMask` invocation.
masker.applyMask(ByteBuffer.wrap(new byte[1]), ByteBuffer.wrap(new byte[1]));
// Perform the actual masking
ByteBuffer src = ByteBuffer
.wrap(new byte[]{
// `initVectorMask` will mask 3 bytes to position the `offset` back to 0.
// It is 3 bytes, because of the 1 byte dummy advancement above.
-0x1, -0x2, 0x3,
// `applyVectorMask` will make a single 8-byte pass
0x1, 0x2, 0x3, 0x4, -0x5, 0x6, -0x7, -0x8,
// `applyPlainMask` will mask 3 bytes
0x1, -0x2, -0x3
// Note minus signs sprinkled above to cover the negative `byte` range in a certain structure:
// Some will get masked with a positive number, some with a negative.
// For instance, for `applyPlainMask`:
// - `0x1` will be masked with `0xA`
// - `-0x2` will be masked with `0xB0`
})
.order(srcOrder);
ByteBuffer dst = ByteBuffer.allocate(src.capacity()).order(dstOrder);
masker.applyMask(src, dst);
// Verify the masking
assertEqualsByteArray(
new byte[]{
// 3 bytes for `initVectorMask`.
// Remember 0xA is consumed by the initial dummy masking.
(byte) (-0x1 ^ 0xB0),
-0x2 ^ 0xC,
(byte) (0x3 ^ 0xD0),
// 8 bytes for `applyVectorMask`
0x1 ^ 0xA,
(byte) (0x2 ^ 0xB0),
0x3 ^ 0xC,
(byte) (0x4 ^ 0xD0),
-0x5 ^ 0xA,
(byte) (0x6 ^ 0xB0),
-0x7 ^ 0xC,
(byte) (-0x8 ^ 0xD0),
// 3 bytes for `applyPlainMask`
0x1 ^ 0xA,
(byte) (-0x2 ^ 0xB0),
-0x3 ^ 0xC
},
dst.array());
}
}
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