update to latest quic native, add quic tests

NOTICE.txt

@@ -42,12 +42,12 @@ Subproject organization
 Original netty subproject names are not related to package names. I reorganized the names to allow better assignment
 between subproject name, package name, artifact names, and java module. The following reorgnizations were performed:
 
-netty/all -> [todo]
+netty/all ->
-netty/bom -> [todo]
+netty/bom ->
 netty/buffer -> netty-buffer
 netty/codec -> netty-handler-codec, netty-handler-codec-compression, netty-handler-codec-protobuf
-netty/codec-dns -> [todo]
+netty/codec-dns -> netty-handler-codec-dns
-netty/codec-haproxy -> [todo]
+netty/codec-haproxy ->
 netty/codec-http -> netty-handler-codec-http, netty-handler-codec-rtsp, netty-handler-codec-spdy
 netty/codec-http2 ->
 netty/codec-memcache ->
@@ -62,7 +62,7 @@ netty/handler -> netty-handler
 netty/handler-proxy
 netty/handler-ssl-ocsp
 netty/resolver -> netty-resolver
-netty/resolver-dns ->
+netty/resolver-dns -> netty-resolver-dns
 netty/resolver-dns-classes-macos -> [dropped]
 netty/resolver-dns-native-macos -> [dropped]
 netty/transport -> netty-channel

build.gradle

@@ -31,7 +31,7 @@ ext {
 apply plugin: 'com.google.osdetector'
 
 subprojects {
-    if (!it.name.endsWith('-native')) {
+    if (!it.name.endsWith('-native') && it.name != 'test-results') {
         apply from: rootProject.file('gradle/repositories/maven.gradle')
         apply from: rootProject.file('gradle/compile/java.gradle')
         apply from: rootProject.file('gradle/test/junit5.gradle')

gradle/test/junit5.gradle

@@ -12,8 +12,8 @@ test {
     useJUnitPlatform()
     failFast = false
     ignoreFailures = true
-    minHeapSize = "1g" // initial heap size
+    minHeapSize = "2g" // initial heap size
-    maxHeapSize = "2g" // maximum heap size
+    maxHeapSize = "4g" // maximum heap size
     jvmArgs '--add-exports=java.base/jdk.internal=ALL-UNNAMED',
             '--add-exports=java.base/jdk.internal.misc=ALL-UNNAMED',
             '--add-exports=java.base/sun.nio.ch=ALL-UNNAMED',

netty-channel-unix-native/build.gradle

@@ -1,3 +1,4 @@
+
 /* currently we do not build our C code natively, but we provide copies of the binaries in META-INF/native */
 
 /* the static library is included in other native builds, so nothing is provided here */

netty-handler-codec-quic-native/NOTICE.txt

@@ -0,0 +1,2 @@
+
+Because we moved from "io.netty.incubator" to "io.netty", we use only a specially prepared linux x86-64 shared library

netty-handler-codec-quic/build.gradle

@@ -3,4 +3,6 @@ dependencies {
     implementation project(':netty-channel-epoll')
     implementation project(':netty-channel-unix')
     runtimeOnly project(path: ':netty-handler-codec-quic-native', configuration: osdetector.classifier)
+    testImplementation testLibs.assertj
+    testImplementation project(':netty-handler-ssl-bouncycastle')
 }

netty-handler-codec-quic/src/main/java/io/netty/handler/codec/quic/QuicSslContextBuilder.java

@@ -182,7 +182,7 @@ public final class QuicSslContextBuilder {
 
     /**
      * Enable / disable keylog. When enabled, TLS keys are logged to an internal logger named
-     * "io.netty.incubator.codec.quic.BoringSSLLogginKeylog" with DEBUG level, see
+     * "io.netty.codec.quic.BoringSSLLogginKeylog" with DEBUG level, see
      * {@link BoringSSLKeylog} for detail, logging keys are following
      * <a href="https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format">
      *     NSS Key Log Format</a>. This is intended for debugging use with tools like Wireshark.

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/AbstractQuicTest.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.util.concurrent.ImmediateExecutor;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Timeout;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+@Timeout(10)
+public abstract class AbstractQuicTest {
+
+    @BeforeAll
+    public static void ensureAvailability() {
+        Quic.ensureAvailability();
+    }
+
+    static Executor[] newSslTaskExecutors() {
+        return new Executor[] {
+                ImmediateExecutor.INSTANCE,
+                Executors.newSingleThreadExecutor()
+        };
+    }
+
+    static void shutdown(Executor executor) {
+        if (executor instanceof ExecutorService) {
+            ((ExecutorService) executor).shutdown();
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/FlushStrategyTest.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2021 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class FlushStrategyTest {
+
+    @Test
+    public void testAfterNumBytes() {
+        FlushStrategy strategy = FlushStrategy.afterNumBytes(10);
+        assertFalse(strategy.shouldFlushNow(1, 10));
+        assertTrue(strategy.shouldFlushNow(1, 11));
+    }
+
+    @Test
+    public void testAfterNumPackets() {
+        FlushStrategy strategy = FlushStrategy.afterNumPackets(10);
+        assertFalse(strategy.shouldFlushNow(10, 10));
+        assertTrue(strategy.shouldFlushNow(11, 11));
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/InsecureQuicTokenHandlerTest.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+
+import org.junit.jupiter.api.Test;
+
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.UnknownHostException;
+import java.util.concurrent.ThreadLocalRandom;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.lessThanOrEqualTo;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+
+public class InsecureQuicTokenHandlerTest extends AbstractQuicTest {
+
+    @Test
+    public void testMaxTokenLength() {
+        assertEquals(InsecureQuicTokenHandler.MAX_TOKEN_LEN, InsecureQuicTokenHandler.INSTANCE.maxTokenLength());
+    }
+
+    @Test
+    public void testTokenProcessingIpv4() throws UnknownHostException {
+        testTokenProcessing(true);
+    }
+
+    @Test
+    public void testTokenProcessingIpv6() throws UnknownHostException {
+        testTokenProcessing(false);
+    }
+
+    private static void testTokenProcessing(boolean ipv4) throws UnknownHostException {
+        byte[] bytes = new byte[Quiche.QUICHE_MAX_CONN_ID_LEN];
+        ThreadLocalRandom.current().nextBytes(bytes);
+        ByteBuf dcid = Unpooled.wrappedBuffer(bytes);
+        ByteBuf out = Unpooled.buffer();
+        try {
+            final InetSocketAddress validAddress;
+            final InetSocketAddress invalidAddress;
+            if (ipv4) {
+                validAddress = new InetSocketAddress(
+                        InetAddress.getByAddress(new byte[] { 10, 10, 10, 1}), 9999);
+                invalidAddress  = new InetSocketAddress(
+                        InetAddress.getByAddress(new byte[] { 10, 10, 10, 10}), 9999);
+            } else {
+                validAddress = new InetSocketAddress(InetAddress.getByAddress(
+                        new byte[] { 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1}), 9999);
+                invalidAddress  = new InetSocketAddress(InetAddress.getByAddress(
+                        new byte[] { 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10}), 9999);
+            }
+
+            InsecureQuicTokenHandler.INSTANCE.writeToken(out, dcid, validAddress);
+            assertThat(out.readableBytes(), lessThanOrEqualTo(InsecureQuicTokenHandler.INSTANCE.maxTokenLength()));
+            assertNotEquals(-1, InsecureQuicTokenHandler.INSTANCE.validateToken(out, validAddress));
+
+            // Use another address and check that the validate fails.
+            assertEquals(-1, InsecureQuicTokenHandler.INSTANCE.validateToken(out, invalidAddress));
+        } finally {
+            dcid.release();
+            out.release();
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicChannelDatagramTest.java

@@ -0,0 +1,305 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelFutureListener;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.ChannelOption;
+import io.netty.util.ReferenceCountUtil;
+import io.netty.util.concurrent.ImmediateEventExecutor;
+import io.netty.util.concurrent.Promise;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.net.InetSocketAddress;
+import java.util.Random;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class QuicChannelDatagramTest extends AbstractQuicTest {
+
+    private static final Random random = new Random();
+    static final byte[] data = new byte[512];
+
+    static {
+        random.nextBytes(data);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testDatagramFlushInChannelRead(Executor executor) throws Throwable {
+        testDatagram(executor, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testDatagramFlushInChannelReadComplete(Executor executor) throws Throwable {
+        testDatagram(executor, true);
+    }
+
+    private void testDatagram(Executor executor, boolean flushInReadComplete) throws Throwable {
+        AtomicReference<QuicDatagramExtensionEvent> serverEventRef = new AtomicReference<>();
+
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler() {
+
+            @Override
+            public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                if (msg instanceof ByteBuf) {
+                    final ChannelFuture future;
+                    if (!flushInReadComplete) {
+                        future = ctx.writeAndFlush(msg);
+                    } else {
+                        future = ctx.write(msg);
+                    }
+                    future.addListener(ChannelFutureListener.CLOSE);
+                } else {
+                    ctx.fireChannelRead(msg);
+                }
+            }
+
+            @Override
+            public void channelReadComplete(ChannelHandlerContext ctx) {
+                if (flushInReadComplete) {
+                    ctx.flush();
+                }
+            }
+
+            @Override
+            public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
+                if (evt instanceof QuicDatagramExtensionEvent) {
+                    serverEventRef.set((QuicDatagramExtensionEvent) evt);
+                }
+                super.userEventTriggered(ctx, evt);
+            }
+        };
+        Channel server = QuicTestUtils.newServer(QuicTestUtils.newQuicServerBuilder(executor)
+                        .datagram(10, 10),
+                InsecureQuicTokenHandler.INSTANCE, serverHandler , new ChannelInboundHandlerAdapter());
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+
+        Promise<ByteBuf> receivedBuffer = ImmediateEventExecutor.INSTANCE.newPromise();
+        AtomicReference<QuicDatagramExtensionEvent> clientEventRef = new AtomicReference<>();
+        Channel channel = QuicTestUtils.newClient(QuicTestUtils.newQuicClientBuilder(executor)
+                .datagram(10, 10));
+
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler() {
+            @Override
+            public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                if (!receivedBuffer.trySuccess((ByteBuf) msg)) {
+                    ReferenceCountUtil.release(msg);
+                }
+            }
+
+            @Override
+            public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
+                if (evt instanceof QuicDatagramExtensionEvent) {
+                    clientEventRef.set((QuicDatagramExtensionEvent) evt);
+                }
+                super.userEventTriggered(ctx, evt);
+            }
+
+            @Override
+            public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+                receivedBuffer.tryFailure(cause);
+                super.exceptionCaught(ctx, cause);
+            }
+        };
+
+        try {
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .remoteAddress(address)
+                    .connect()
+                    .get();
+            quicChannel.writeAndFlush(Unpooled.copiedBuffer(data)).sync();
+
+            ByteBuf buffer = receivedBuffer.get();
+            ByteBuf expected = Unpooled.wrappedBuffer(data);
+            assertEquals(expected, buffer);
+            buffer.release();
+            expected.release();
+
+            assertNotEquals(0, serverEventRef.get().maxLength());
+            assertNotEquals(0, clientEventRef.get().maxLength());
+
+            quicChannel.close().sync();
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            server.close().sync();
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+
+            shutdown(executor);
+        }
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testDatagramNoAutoReadMaxMessagesPerRead1(Executor executor) throws Throwable {
+        testDatagramNoAutoRead(executor, 1, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testDatagramNoAutoReadMaxMessagesPerRead3(Executor executor) throws Throwable {
+        testDatagramNoAutoRead(executor, 3, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testDatagramNoAutoReadMaxMessagesPerRead1OutSideEventLoop(Executor executor) throws Throwable {
+        testDatagramNoAutoRead(executor, 1, true);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testDatagramNoAutoReadMaxMessagesPerRead3OutSideEventLoop(Executor executor) throws Throwable {
+        testDatagramNoAutoRead(executor, 3, true);
+    }
+
+    private void testDatagramNoAutoRead(Executor executor, int maxMessagesPerRead, boolean readLater) throws Throwable {
+        Promise<Void> serverPromise = ImmediateEventExecutor.INSTANCE.newPromise();
+        Promise<ByteBuf> clientPromise = ImmediateEventExecutor.INSTANCE.newPromise();
+
+        int numDatagrams = 5;
+        AtomicInteger serverReadCount = new AtomicInteger();
+        CountDownLatch latch  = new CountDownLatch(numDatagrams);
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler() {
+            private int readPerLoop;
+
+            @Override
+            public void channelActive(ChannelHandlerContext ctx) {
+                ctx.read();
+            }
+
+            @Override
+            public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                if (msg instanceof ByteBuf) {
+                    readPerLoop++;
+
+                    ctx.writeAndFlush(msg).addListener(future -> {
+                        if (future.isSuccess()) {
+                            latch.countDown();
+                        }
+                    });
+                    if (serverReadCount.incrementAndGet() == numDatagrams) {
+                        serverPromise.trySuccess(null);
+                    }
+                } else {
+                    ctx.fireChannelRead(msg);
+                }
+            }
+
+            @Override
+            public void channelReadComplete(ChannelHandlerContext ctx) {
+                if (readPerLoop > maxMessagesPerRead) {
+                    ctx.close();
+                    serverPromise.tryFailure(new AssertionError(
+                            "Read more then " + maxMessagesPerRead +  " time per read loop"));
+                    return;
+                }
+                readPerLoop = 0;
+                if (serverReadCount.get() < numDatagrams) {
+                    if (readLater) {
+                        ctx.executor().execute(ctx::read);
+                    } else {
+                        ctx.read();
+                    }
+                }
+            }
+        };
+        Channel server = QuicTestUtils.newServer(QuicTestUtils.newQuicServerBuilder(executor)
+                        .option(ChannelOption.AUTO_READ, false)
+                        .option(ChannelOption.MAX_MESSAGES_PER_READ, maxMessagesPerRead)
+                        .datagram(10, 10),
+                InsecureQuicTokenHandler.INSTANCE, serverHandler, new ChannelInboundHandlerAdapter());
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+
+        Channel channel = QuicTestUtils.newClient(QuicTestUtils.newQuicClientBuilder(executor)
+                .datagram(10, 10));
+        AtomicInteger clientReadCount = new AtomicInteger();
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler() {
+
+            @Override
+            public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                if (msg instanceof ByteBuf) {
+
+                    if (clientReadCount.incrementAndGet() == numDatagrams) {
+                        if (!clientPromise.trySuccess((ByteBuf) msg)) {
+                            ReferenceCountUtil.release(msg);
+                        }
+                    } else {
+                        ReferenceCountUtil.release(msg);
+                    }
+                } else {
+                    ctx.fireChannelRead(msg);
+                }
+            }
+
+            @Override
+            public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+                clientPromise.tryFailure(cause);
+            }
+        };
+        try {
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .remoteAddress(address)
+                    .connect()
+                    .get();
+            for (int i = 0; i < numDatagrams; i++) {
+                quicChannel.writeAndFlush(Unpooled.copiedBuffer(data)).sync();
+                // Let's add some sleep in between as this is UDP so we may loose some data otherwise.
+                Thread.sleep(50);
+            }
+            assertTrue(serverPromise.await(3000), "Server received: " + serverReadCount.get() +
+                    ", Client received: " + clientReadCount.get());
+            serverPromise.sync();
+
+            assertTrue(clientPromise.await(3000), "Server received: " + serverReadCount.get() +
+                    ", Client received: " + clientReadCount.get());
+            ByteBuf buffer = clientPromise.get();
+            ByteBuf expected = Unpooled.wrappedBuffer(data);
+            assertEquals(expected, buffer);
+            buffer.release();
+            expected.release();
+
+            quicChannel.close().sync();
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            server.close().sync();
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+
+            shutdown(executor);
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicChannelEchoTest.java

@@ -0,0 +1,439 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.AbstractByteBufAllocator;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufAllocator;
+import io.netty.buffer.CompositeByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.buffer.UnpooledByteBufAllocator;
+import io.netty.buffer.UnpooledDirectByteBuf;
+import io.netty.buffer.UnpooledHeapByteBuf;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.ChannelOption;
+import io.netty.channel.SimpleChannelInboundHandler;
+import io.netty.util.concurrent.Future;
+import io.netty.util.concurrent.ImmediateExecutor;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Random;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class QuicChannelEchoTest extends AbstractQuicTest {
+
+    private static final Random random = new Random();
+    static final byte[] data = new byte[1048576];
+
+    static {
+        random.nextBytes(data);
+    }
+
+    public static Collection<Object[]> data() {
+        List<Object[]> config = new ArrayList<>();
+        for (int a = 0; a < 2; a++) {
+            for (int b = 0; b < 2; b++) {
+                for (int c = 0; c < 2; c++) {
+                    config.add(new Object[] { a == 0, b == 0, c == 0 });
+                }
+            }
+        }
+        return config;
+    }
+
+    private void setAllocator(Channel channel, ByteBufAllocator allocator) {
+        channel.config().setAllocator(allocator);
+    }
+
+    private ByteBufAllocator getAllocator(boolean directBuffer) {
+        if (directBuffer) {
+            return new UnpooledByteBufAllocator(true);
+        } else {
+            // Force usage of heap buffers and also ensure memoryAddress() is not not supported.
+            return new AbstractByteBufAllocator(false) {
+
+                @Override
+                public ByteBuf ioBuffer() {
+                    return heapBuffer();
+                }
+
+                @Override
+                public ByteBuf ioBuffer(int initialCapacity) {
+                    return heapBuffer(initialCapacity);
+                }
+
+                @Override
+                public ByteBuf ioBuffer(int initialCapacity, int maxCapacity) {
+                    return heapBuffer(initialCapacity, maxCapacity);
+                }
+
+                @Override
+                protected ByteBuf newHeapBuffer(int initialCapacity, int maxCapacity) {
+                    return new UnpooledHeapByteBuf(this, initialCapacity, maxCapacity);
+                }
+
+                @Override
+                protected ByteBuf newDirectBuffer(int initialCapacity, int maxCapacity) {
+                    return new UnpooledDirectByteBuf(this, initialCapacity, maxCapacity);
+                }
+
+                @Override
+                public boolean isDirectBufferPooled() {
+                    return false;
+                }
+            };
+        }
+    }
+
+    @ParameterizedTest(name =
+            "{index}: autoRead = {0}, directBuffer = {1}, composite = {2}")
+    @MethodSource("data")
+    public void testEchoStartedFromServer(boolean autoRead, boolean directBuffer, boolean composite) throws Throwable {
+        ByteBufAllocator allocator = getAllocator(directBuffer);
+        final EchoHandler sh = new EchoHandler(true, autoRead, allocator);
+        final EchoHandler ch = new EchoHandler(false, autoRead, allocator);
+        AtomicReference<List<ChannelFuture>> writeFutures = new AtomicReference<>();
+        Channel server = QuicTestUtils.newServer(ImmediateExecutor.INSTANCE, new ChannelInboundHandlerAdapter() {
+            @Override
+            public void channelActive(ChannelHandlerContext ctx) {
+                setAllocator(ctx.channel(), allocator);
+                ((QuicChannel) ctx.channel()).createStream(QuicStreamType.BIDIRECTIONAL, sh)
+                        .addListener((Future<QuicStreamChannel> future) -> {
+                            QuicStreamChannel stream = future.getNow();
+                            setAllocator(stream, allocator);
+                            List<ChannelFuture> futures = writeAllData(stream, composite, allocator);
+                            writeFutures.set(futures);
+                        });
+
+                ctx.channel().config().setAutoRead(autoRead);
+                if (!autoRead) {
+                    ctx.read();
+                }
+            }
+
+            @Override
+            public void channelReadComplete(ChannelHandlerContext ctx) {
+                if (!autoRead) {
+                    ctx.read();
+                }
+            }
+        }, sh);
+        setAllocator(server, allocator);
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+        Channel channel = QuicTestUtils.newClient(ImmediateExecutor.INSTANCE);
+        QuicChannel quicChannel = null;
+        try {
+            quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(new ChannelInboundHandlerAdapter() {
+                        @Override
+                        public void channelActive(ChannelHandlerContext ctx) {
+                            if (!autoRead) {
+                                ctx.read();
+                            }
+                        }
+
+                        @Override
+                        public void channelReadComplete(ChannelHandlerContext ctx) {
+                            if (!autoRead) {
+                                ctx.read();
+                            }
+                        }
+                    })
+                    .streamHandler(ch)
+                    // Use the same allocator for the streams.
+                    .streamOption(ChannelOption.ALLOCATOR, allocator)
+                    .remoteAddress(address)
+                    .option(ChannelOption.AUTO_READ, autoRead)
+                    .option(ChannelOption.ALLOCATOR, allocator)
+                    .connect()
+                    .get();
+
+            waitForData(ch, sh);
+
+            for (;;) {
+                List<ChannelFuture> futures = writeFutures.get();
+                if (futures != null) {
+                    for (ChannelFuture f: futures) {
+                        f.sync();
+                    }
+                    break;
+                }
+
+                try {
+                    Thread.sleep(50);
+                } catch (InterruptedException e) {
+                    // Ignore.
+                }
+            }
+            waitForData(sh, ch);
+
+            // Close underlying streams.
+            sh.channel.close().sync();
+            ch.channel.close().sync();
+
+            // Close underlying quic channels
+            sh.channel.parent().close().sync();
+            ch.channel.parent().close().sync();
+
+            checkForException(ch, sh);
+        } finally {
+            server.close().sync();
+            QuicTestUtils.closeIfNotNull(quicChannel);
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+        }
+    }
+
+    @ParameterizedTest(name =
+            "{index}: autoRead = {0}, directBuffer = {1}, composite = {2}")
+    @MethodSource("data")
+    public void testEchoStartedFromClient(boolean autoRead, boolean directBuffer, boolean composite) throws Throwable {
+        ByteBufAllocator allocator = getAllocator(directBuffer);
+
+        final EchoHandler sh = new EchoHandler(true, autoRead, allocator);
+        final EchoHandler ch = new EchoHandler(false, autoRead, allocator);
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler() {
+            @Override
+            public void channelActive(ChannelHandlerContext ctx) {
+                setAllocator(ctx.channel(), allocator);
+                ctx.channel().config().setAutoRead(autoRead);
+                if (!autoRead) {
+                    ctx.read();
+                }
+            }
+
+            @Override
+            public void channelReadComplete(ChannelHandlerContext ctx) {
+                if (!autoRead) {
+                    ctx.read();
+                }
+            }
+        };
+
+        Channel server = QuicTestUtils.newServer(ImmediateExecutor.INSTANCE, serverHandler, sh);
+        setAllocator(server, allocator);
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+        Channel channel = QuicTestUtils.newClient(ImmediateExecutor.INSTANCE);
+        QuicChannel quicChannel = null;
+        try {
+            QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler() {
+                @Override
+                public void channelActive(ChannelHandlerContext ctx) {
+                    if (!autoRead) {
+                        ctx.read();
+                    }
+                }
+
+                @Override
+                public void channelReadComplete(ChannelHandlerContext ctx) {
+                    if (!autoRead) {
+                        ctx.read();
+                    }
+                }
+            };
+            quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(ch)
+                    // Use the same allocator for the streams.
+                    .streamOption(ChannelOption.ALLOCATOR, allocator)
+                    .remoteAddress(address)
+                    .option(ChannelOption.AUTO_READ, autoRead)
+                    .option(ChannelOption.ALLOCATOR, allocator)
+                    .connect()
+                    .get();
+
+            QuicStreamChannel stream = quicChannel.createStream(QuicStreamType.BIDIRECTIONAL, ch).sync().getNow();
+            setAllocator(stream, allocator);
+
+            assertEquals(QuicStreamType.BIDIRECTIONAL, stream.type());
+            assertEquals(0, stream.streamId());
+            assertTrue(stream.isLocalCreated());
+
+            for (int i = 0; i < 5; i++) {
+                ch.counter = 0;
+                sh.counter = 0;
+                List<ChannelFuture> futures = writeAllData(stream, composite, allocator);
+
+                for (ChannelFuture f : futures) {
+                    f.sync();
+                }
+                waitForData(ch, sh);
+                waitForData(sh, ch);
+                Thread.sleep(100);
+            }
+
+            // Close underlying streams.
+            sh.channel.close().sync();
+            ch.channel.close().sync();
+
+            // Close underlying quic channels
+            sh.channel.parent().close().sync();
+            ch.channel.parent().close().sync();
+            checkForException(ch, sh);
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            server.close().syncUninterruptibly();
+            QuicTestUtils.closeIfNotNull(quicChannel);
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+        }
+    }
+
+    private List<ChannelFuture> writeAllData(Channel channel, boolean composite, ByteBufAllocator allocator) {
+        if (composite) {
+            CompositeByteBuf compositeByteBuf = allocator.compositeBuffer();
+            for (int i = 0; i < data.length;) {
+                int length = Math.min(random.nextInt(1024 * 64), data.length - i);
+                ByteBuf buf = allocator.buffer().writeBytes(data, i, length);
+                compositeByteBuf.addComponent(true, buf);
+                i += length;
+            }
+            return Collections.singletonList(channel.writeAndFlush(compositeByteBuf));
+        } else {
+            List<ChannelFuture> futures = new ArrayList<>();
+            for (int i = 0; i < data.length;) {
+                int length = Math.min(random.nextInt(1024 * 64), data.length - i);
+                ByteBuf buf = allocator.buffer().writeBytes(data, i, length);
+                futures.add(channel.writeAndFlush(buf));
+                i += length;
+            }
+            return futures;
+        }
+    }
+
+    private static void waitForData(EchoHandler h1, EchoHandler h2) {
+        while (h1.counter < data.length) {
+            if (h2.exception.get() != null) {
+                break;
+            }
+            if (h1.exception.get() != null) {
+                break;
+            }
+
+            try {
+                Thread.sleep(50);
+            } catch (InterruptedException e) {
+                // Ignore.
+            }
+        }
+    }
+
+    private static void checkForException(EchoHandler h1, EchoHandler h2) throws Throwable {
+        if (h1.exception.get() != null && !(h1.exception.get() instanceof IOException)) {
+            throw h1.exception.get();
+        }
+        if (h2.exception.get() != null && !(h2.exception.get() instanceof IOException)) {
+            throw h2.exception.get();
+        }
+        if (h1.exception.get() != null) {
+            throw h1.exception.get();
+        }
+        if (h2.exception.get() != null) {
+            throw h2.exception.get();
+        }
+    }
+
+    private class EchoHandler extends SimpleChannelInboundHandler<ByteBuf> {
+        private final boolean server;
+        private final boolean autoRead;
+        private final ByteBufAllocator allocator;
+        volatile Channel channel;
+        final AtomicReference<Throwable> exception = new AtomicReference<>();
+        volatile int counter;
+
+        EchoHandler(boolean server, boolean autoRead, ByteBufAllocator allocator) {
+            this.server = server;
+            this.autoRead = autoRead;
+            this.allocator = allocator;
+        }
+
+        @Override
+        public void channelRegistered(ChannelHandlerContext ctx) {
+            ctx.channel().config().setAutoRead(autoRead);
+            setAllocator(ctx.channel(), allocator);
+            ctx.fireChannelRegistered();
+        }
+
+        @Override
+        public void channelActive(ChannelHandlerContext ctx) {
+            channel = ctx.channel();
+            QuicStreamChannel channel = (QuicStreamChannel)  ctx.channel();
+            assertEquals(QuicStreamType.BIDIRECTIONAL, channel.type());
+            if (channel.isLocalCreated()) {
+                // Server starts with 1, client with 0
+                assertEquals(server ? 1 : 0, channel.streamId());
+            } else {
+                // Server starts with 1, client with 0
+                assertEquals(server ? 0 : 1, channel.streamId());
+            }
+            if (!autoRead) {
+                ctx.read();
+            }
+        }
+
+        @Override
+        protected void channelRead0(ChannelHandlerContext ctx, ByteBuf in) {
+            byte[] actual = new byte[in.readableBytes()];
+            in.readBytes(actual);
+
+            int lastIdx = counter;
+            for (int i = 0; i < actual.length; i ++) {
+                assertEquals(data[i + lastIdx], actual[i]);
+            }
+
+            if (!((QuicStreamChannel) ctx.channel()).isLocalCreated()) {
+                channel.write(Unpooled.wrappedBuffer(actual));
+            }
+
+            counter += actual.length;
+        }
+
+        @Override
+        public void channelReadComplete(ChannelHandlerContext ctx) {
+            try {
+                ctx.flush();
+            } finally {
+                if (!autoRead) {
+                    ctx.read();
+                }
+            }
+        }
+
+        @Override
+        public void exceptionCaught(ChannelHandlerContext ctx,
+                                    Throwable cause) {
+            if (exception.compareAndSet(null, cause)) {
+                cause.printStackTrace();
+                ctx.close();
+            }
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicChannelValidationHandler.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2021 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+
+class QuicChannelValidationHandler extends ChannelInboundHandlerAdapter {
+
+    private volatile Throwable cause;
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+        this.cause = cause;
+    }
+
+    void assertState() throws Throwable {
+        if (cause != null) {
+            throw cause;
+        }
+    }
+
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicCodecBuilderTest.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright 2021 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.channel.ChannelHandler;
+import io.netty.util.concurrent.ImmediateExecutor;
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Field;
+import java.util.concurrent.Executor;
+import java.util.function.Function;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class QuicCodecBuilderTest {
+
+    @Test
+    void testCopyConstructor() throws IllegalAccessException {
+        TestQuicCodecBuilder original = new TestQuicCodecBuilder();
+        init(original);
+        TestQuicCodecBuilder copy = new TestQuicCodecBuilder(original);
+        assertThat(copy).usingRecursiveComparison().isEqualTo(original);
+    }
+
+    private static void init(TestQuicCodecBuilder builder) throws IllegalAccessException {
+        Field[] fields = builder.getClass().getSuperclass().getDeclaredFields();
+        for (Field field : fields) {
+            modifyField(builder, field);
+        }
+    }
+
+    private static void modifyField(TestQuicCodecBuilder builder, Field field) throws IllegalAccessException {
+        field.setAccessible(true);
+        Class<?> clazz = field.getType();
+        if (Boolean.class == clazz) {
+            field.set(builder, Boolean.TRUE);
+        } else if (Integer.class == clazz) {
+            field.set(builder, Integer.MIN_VALUE);
+        } else if (Long.class == clazz) {
+            field.set(builder, Long.MIN_VALUE);
+        } else if (QuicCongestionControlAlgorithm.class == clazz) {
+            field.set(builder, QuicCongestionControlAlgorithm.CUBIC);
+        } else if (FlushStrategy.class == clazz) {
+            field.set(builder, FlushStrategy.afterNumBytes(10));
+        } else if (Function.class == clazz) {
+            field.set(builder, Function.identity());
+        } else if (boolean.class == clazz) {
+            field.setBoolean(builder, true);
+        } else if (int.class == clazz) {
+            field.setInt(builder, -1);
+        } else if (byte[].class == clazz) {
+            field.set(builder, new byte[16]);
+        } else if (Executor.class == clazz) {
+            field.set(builder, ImmediateExecutor.INSTANCE);
+        } else {
+            throw new IllegalArgumentException("Unknown field type " + clazz);
+        }
+    }
+
+    private static final class TestQuicCodecBuilder extends QuicCodecBuilder<TestQuicCodecBuilder> {
+
+        TestQuicCodecBuilder() {
+            super(true);
+        }
+
+        TestQuicCodecBuilder(TestQuicCodecBuilder builder) {
+            super(builder);
+        }
+
+        @Override
+        public TestQuicCodecBuilder clone() {
+            // no-op
+            return null;
+        }
+
+        @Override
+        protected ChannelHandler build(
+                QuicheConfig config,
+                Function<QuicChannel, ? extends QuicSslEngine> sslContextProvider,
+                Executor sslTaskExecutor,
+                int localConnIdLength,
+                FlushStrategy flushStrategy) {
+            // no-op
+            return null;
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicConnectionAddressTest.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.ByteBuffer;
+import java.util.concurrent.ThreadLocalRandom;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class QuicConnectionAddressTest extends AbstractQuicTest {
+
+    @Test
+    public void testNullByteArray() {
+        assertThrows(NullPointerException.class, () -> new QuicConnectionAddress((byte[]) null));
+    }
+
+    @Test
+    public void testNullByteBuffer() {
+        assertThrows(NullPointerException.class, () -> new QuicConnectionAddress((ByteBuffer) null));
+    }
+
+    @Test
+    public void testByteArrayIsCloned() {
+        byte[] bytes = new byte[8];
+        ThreadLocalRandom.current().nextBytes(bytes);
+        QuicConnectionAddress address = new QuicConnectionAddress(bytes);
+        assertEquals(ByteBuffer.wrap(bytes), address.connId);
+        ThreadLocalRandom.current().nextBytes(bytes);
+        assertNotEquals(ByteBuffer.wrap(bytes), address.connId);
+    }
+
+    @Test
+    public void tesByteBufferIsDuplicated() {
+        byte[] bytes = new byte[8];
+        ThreadLocalRandom.current().nextBytes(bytes);
+        ByteBuffer buffer = ByteBuffer.wrap(bytes);
+        QuicConnectionAddress address = new QuicConnectionAddress(bytes);
+        assertEquals(buffer, address.connId);
+        buffer.position(1);
+        assertNotEquals(buffer, address.connId);
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicConnectionIdGeneratorTest.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.ByteBuffer;
+import java.util.concurrent.ThreadLocalRandom;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.greaterThan;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class QuicConnectionIdGeneratorTest extends AbstractQuicTest {
+
+    @Test
+    public void testRandomness() {
+        QuicConnectionIdGenerator idGenerator = QuicConnectionIdGenerator.randomGenerator();
+        ByteBuffer id = idGenerator.newId(Quiche.QUICHE_MAX_CONN_ID_LEN);
+        ByteBuffer id2 = idGenerator.newId(Quiche.QUICHE_MAX_CONN_ID_LEN);
+        assertThat(id.remaining(), greaterThan(0));
+        assertThat(id2.remaining(), greaterThan(0));
+        assertNotEquals(id, id2);
+
+        id = idGenerator.newId(10);
+        id2 = idGenerator.newId(10);
+        assertEquals(10, id.remaining());
+        assertEquals(10, id2.remaining());
+        assertNotEquals(id, id2);
+
+        byte[] input = new byte[1024];
+        ThreadLocalRandom.current().nextBytes(input);
+        id = idGenerator.newId(ByteBuffer.wrap(input), 10);
+        id2 = idGenerator.newId(ByteBuffer.wrap(input), 10);
+        assertEquals(10, id.remaining());
+        assertEquals(10, id2.remaining());
+        assertNotEquals(id, id2);
+    }
+
+    @Test
+    public void testThrowsIfInputTooBig() {
+        QuicConnectionIdGenerator idGenerator = QuicConnectionIdGenerator.randomGenerator();
+        assertThrows(IllegalArgumentException.class, () -> idGenerator.newId(Integer.MAX_VALUE));
+    }
+
+    @Test
+    public void testThrowsIfInputTooBig2() {
+        QuicConnectionIdGenerator idGenerator = QuicConnectionIdGenerator.randomGenerator();
+        assertThrows(IllegalArgumentException.class, () ->
+                idGenerator.newId(ByteBuffer.wrap(new byte[8]), Integer.MAX_VALUE));
+    }
+
+    @Test
+    public void testSignIdGenerator() {
+        QuicConnectionIdGenerator idGenerator = QuicConnectionIdGenerator.signGenerator();
+
+        byte[] input = new byte[1024];
+        byte[] input2 = new byte[1024];
+        ThreadLocalRandom.current().nextBytes(input);
+        ThreadLocalRandom.current().nextBytes(input2);
+        ByteBuffer id = idGenerator.newId(ByteBuffer.wrap(input), 10);
+        ByteBuffer id2 = idGenerator.newId(ByteBuffer.wrap(input), 10);
+        ByteBuffer id3 = idGenerator.newId(ByteBuffer.wrap(input2), 10);
+        assertEquals(10, id.remaining());
+        assertEquals(10, id2.remaining());
+        assertEquals(10, id3.remaining());
+        assertEquals(id, id2);
+        assertNotEquals(id, id3);
+
+        assertThrows(UnsupportedOperationException.class, () -> idGenerator.newId(10));
+        assertThrows(NullPointerException.class, () -> idGenerator.newId(null, 10));
+        assertThrows(IllegalArgumentException.class, () -> idGenerator.newId(ByteBuffer.wrap(new byte[0]), 10));
+        assertThrows(IllegalArgumentException.class, () ->
+                idGenerator.newId(ByteBuffer.wrap(input), Integer.MAX_VALUE));
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicConnectionStatsTest.java

@@ -0,0 +1,143 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.util.concurrent.ImmediateEventExecutor;
+import io.netty.util.concurrent.Promise;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.greaterThan;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+
+public class QuicConnectionStatsTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testStatsAreCollected(Executor executor) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        AtomicInteger counter = new AtomicInteger();
+
+        Promise<QuicConnectionStats> serverActiveStats = ImmediateEventExecutor.INSTANCE.newPromise();
+        Promise<QuicConnectionStats> serverInactiveStats = ImmediateEventExecutor.INSTANCE.newPromise();
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler() {
+            @Override
+            public void channelActive(ChannelHandlerContext ctx) {
+                collectStats(ctx, serverActiveStats);
+                ctx.fireChannelActive();
+            }
+
+            @Override
+            public void channelInactive(ChannelHandlerContext ctx) {
+                collectStats(ctx, serverInactiveStats);
+                ctx.fireChannelInactive();
+            }
+
+            private void collectStats(ChannelHandlerContext ctx, Promise<QuicConnectionStats> promise) {
+                QuicheQuicChannel channel = (QuicheQuicChannel) ctx.channel();
+                channel.collectStats(promise);
+            }
+        };
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+        try {
+            server = QuicTestUtils.newServer(executor, serverHandler, new ChannelInboundHandlerAdapter() {
+
+                @Override
+                public void channelActive(ChannelHandlerContext ctx) {
+                    counter.incrementAndGet();
+                }
+
+                @Override
+                public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                    // Let's just echo back the message.
+                    ctx.writeAndFlush(msg);
+                }
+
+                @Override
+                public boolean isSharable() {
+                    return true;
+                }
+            });
+            channel = QuicTestUtils.newClient(executor);
+
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(server.localAddress())
+                    .connect().get();
+            assertNotNull(quicChannel.collectStats().sync().getNow());
+            quicChannel.createStream(QuicStreamType.BIDIRECTIONAL, new ChannelInboundHandlerAdapter() {
+                private final int bufferSize = 8;
+                private int received;
+
+                @Override
+                public void channelActive(ChannelHandlerContext ctx) {
+                    ctx.writeAndFlush(Unpooled.buffer().writeZero(bufferSize));
+                }
+
+                @Override
+                public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                    ByteBuf buffer = (ByteBuf) msg;
+                    received += buffer.readableBytes();
+                    buffer.release();
+                    if (received == bufferSize) {
+                        ctx.close().addListener((ChannelFuture future) -> {
+                            // Close the underlying QuicChannel as well.
+                            future.channel().parent().close();
+                        });
+                    }
+                }
+            }).sync();
+
+            // Wait until closure
+            quicChannel.closeFuture().sync();
+            assertStats(quicChannel.collectStats().sync().getNow());
+            assertNotNull(serverActiveStats.sync().getNow());
+            assertStats(serverInactiveStats.sync().getNow());
+            assertEquals(1, counter.get());
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+
+            shutdown(executor);
+        }
+    }
+
+    private static void assertStats(QuicConnectionStats stats) {
+        assertNotNull(stats);
+        assertThat(stats.lost(), greaterThanOrEqualTo(0L));
+        assertThat(stats.recv(), greaterThan(0L));
+        assertThat(stats.sent(), greaterThan(0L));
+        assertThat(stats.sentBytes(), greaterThan(0L));
+        assertThat(stats.recvBytes(), greaterThan(0L));
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicPacketTypeTest.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class QuicPacketTypeTest extends AbstractQuicTest {
+
+    @Test
+    public void testOfValidType() {
+        for (QuicPacketType type: QuicPacketType.values()) {
+            assertEquals(type, QuicPacketType.of(type.type));
+        }
+    }
+
+    @Test
+    public void testOfInvalidType() {
+        assertThrows(IllegalArgumentException.class, () -> QuicPacketType.of((byte) -1));
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicReadableTest.java

@@ -0,0 +1,138 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+public class QuicReadableTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCorrectlyHandleReadableStreams(Executor executor) throws Throwable  {
+        int numOfStreams = 256;
+        int readStreams = numOfStreams / 2;
+        // We do write longs.
+        int expectedDataRead = readStreams * Long.BYTES;
+        final CountDownLatch latch = new CountDownLatch(numOfStreams);
+        final AtomicInteger bytesRead = new AtomicInteger();
+        final AtomicReference<Throwable> serverErrorRef = new AtomicReference<>();
+        final AtomicReference<Throwable> clientErrorRef = new AtomicReference<>();
+
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+        Channel server = QuicTestUtils.newServer(
+                QuicTestUtils.newQuicServerBuilder(executor).initialMaxStreamsBidirectional(5000),
+                InsecureQuicTokenHandler.INSTANCE,
+                serverHandler, new ChannelInboundHandlerAdapter() {
+                    private int counter;
+                    @Override
+                    public void channelRegistered(ChannelHandlerContext ctx) {
+                        // Ensure we dont read from the streams so all of these will be reported as readable
+                        ctx.channel().config().setAutoRead(false);
+                    }
+
+                    @Override
+                    public void channelActive(ChannelHandlerContext ctx) {
+                        counter++;
+                        latch.countDown();
+                        if (counter > readStreams) {
+                            // Now set it to readable again for some channels
+                            ctx.channel().config().setAutoRead(true);
+                        }
+                    }
+
+                    @Override
+                    public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                        ByteBuf buffer = (ByteBuf) msg;
+                        bytesRead.addAndGet(buffer.readableBytes());
+                        buffer.release();
+                    }
+
+                    @Override
+                    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+                        serverErrorRef.set(cause);
+                    }
+
+                    @Override
+                    public boolean isSharable() {
+                        return true;
+                    }
+                });
+        Channel channel = QuicTestUtils.newClient(executor);
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+        ByteBuf data = Unpooled.directBuffer().writeLong(8);
+        try {
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(server.localAddress())
+                    .connect()
+                    .get();
+
+            List<Channel> streams = new ArrayList<>();
+            for (int i = 0; i < numOfStreams; i++) {
+                QuicStreamChannel stream = quicChannel.createStream(
+                        QuicStreamType.BIDIRECTIONAL, new ChannelInboundHandlerAdapter() {
+                            @Override
+                            public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+                                clientErrorRef.set(cause);
+                            }
+                        }).get();
+                streams.add(stream.writeAndFlush(data.retainedSlice()).sync().channel());
+            }
+            latch.await();
+            while (bytesRead.get() < expectedDataRead) {
+                Thread.sleep(50);
+            }
+            for (Channel stream: streams) {
+                stream.close().sync();
+            }
+            quicChannel.close().sync();
+
+            throwIfNotNull(serverErrorRef);
+            throwIfNotNull(clientErrorRef);
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            data.release();
+            server.close().sync();
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+
+            shutdown(executor);
+        }
+    }
+
+    private static void throwIfNotNull(AtomicReference<Throwable> errorRef) throws Throwable {
+        Throwable cause = errorRef.get();
+        if (cause != null) {
+            throw cause;
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicSslContextTest.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2021 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.handler.ssl.SslContext;
+import io.netty.util.internal.EmptyArrays;
+import org.junit.jupiter.api.Test;
+
+import javax.net.ssl.SSLSessionContext;
+import javax.net.ssl.X509ExtendedKeyManager;
+
+import java.net.Socket;
+import java.security.Principal;
+import java.security.PrivateKey;
+import java.security.cert.X509Certificate;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class QuicSslContextTest {
+
+    @Test
+    public void testSessionContextSettingsForClient() {
+        testSessionContextSettings(QuicSslContextBuilder.forClient(), 20, 50);
+    }
+
+    @Test
+    public void testSessionContextSettingsForServer() {
+        testSessionContextSettings(QuicSslContextBuilder.forServer(new X509ExtendedKeyManager() {
+            @Override
+            public String[] getClientAliases(String keyType, Principal[] issuers) {
+                return EmptyArrays.EMPTY_STRINGS;
+            }
+
+            @Override
+            public String chooseClientAlias(String[] keyType, Principal[] issuers, Socket socket) {
+                return null;
+            }
+
+            @Override
+            public String[] getServerAliases(String keyType, Principal[] issuers) {
+                return EmptyArrays.EMPTY_STRINGS;
+            }
+
+            @Override
+            public String chooseServerAlias(String keyType, Principal[] issuers, Socket socket) {
+                return null;
+            }
+
+            @Override
+            public X509Certificate[] getCertificateChain(String alias) {
+                return new X509Certificate[0];
+            }
+
+            @Override
+            public PrivateKey getPrivateKey(String alias) {
+                return null;
+            }
+        }, null), 20, 50);
+    }
+
+    private void testSessionContextSettings(QuicSslContextBuilder builder, int size, int timeout) {
+        SslContext context = builder.sessionCacheSize(size).sessionTimeout(timeout).build();
+        assertEquals(size, context.sessionCacheSize());
+        assertEquals(timeout, context.sessionTimeout());
+        SSLSessionContext sessionContext = context.sessionContext();
+        assertEquals(size, sessionContext.getSessionCacheSize());
+        assertEquals(timeout, sessionContext.getSessionTimeout());
+
+        int newSize = size / 2;
+        sessionContext.setSessionCacheSize(newSize);
+        assertEquals(newSize, context.sessionCacheSize());
+
+        int newTimeout = timeout / 2;
+        sessionContext.setSessionTimeout(newTimeout);
+        assertEquals(newTimeout, sessionContext.getSessionTimeout());
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicStreamChannelCloseTest.java

@@ -0,0 +1,304 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelFutureListener;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.socket.ChannelInputShutdownReadComplete;
+import io.netty.channel.socket.ChannelOutputShutdownException;
+import io.netty.util.ReferenceCountUtil;
+
+import io.netty.util.concurrent.ImmediateEventExecutor;
+import io.netty.util.concurrent.Promise;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.nio.channels.ClosedChannelException;
+import java.util.concurrent.Executor;
+import java.util.concurrent.TimeUnit;
+
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+
+public class QuicStreamChannelCloseTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCloseFromServerWhileInActiveUnidirectional(Executor executor) throws Throwable {
+        testCloseFromServerWhileInActive(executor, QuicStreamType.UNIDIRECTIONAL, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCloseFromServerWhileInActiveBidirectional(Executor executor) throws Throwable {
+        testCloseFromServerWhileInActive(executor, QuicStreamType.BIDIRECTIONAL, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testHalfCloseFromServerWhileInActiveUnidirectional(Executor executor) throws Throwable {
+        testCloseFromServerWhileInActive(executor, QuicStreamType.UNIDIRECTIONAL, true);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testHalfCloseFromServerWhileInActiveBidirectional(Executor executor) throws Throwable {
+        testCloseFromServerWhileInActive(executor, QuicStreamType.BIDIRECTIONAL, true);
+    }
+
+    private static void testCloseFromServerWhileInActive(Executor executor, QuicStreamType type,
+                                                         boolean halfClose) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        try {
+            final Promise<Channel> streamPromise = ImmediateEventExecutor.INSTANCE.newPromise();
+            QuicChannelValidationHandler serverHandler = new StreamCreationHandler(type, halfClose, streamPromise);
+            server = QuicTestUtils.newServer(executor, serverHandler,
+                    new ChannelInboundHandlerAdapter());
+            channel = QuicTestUtils.newClient(executor);
+
+            QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new StreamHandler())
+                    .remoteAddress(server.localAddress())
+                    .connect()
+                    .get();
+
+            Channel streamChannel = streamPromise.get();
+
+            // Wait for the steam to close. It needs to happen before the 5-second connection idle timeout.
+            streamChannel.closeFuture().get(3000, TimeUnit.MILLISECONDS);
+
+            streamChannel.parent().close();
+
+            // Wait till the client was closed
+            quicChannel.closeFuture().sync();
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+
+            shutdown(executor);
+        }
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCloseFromClientWhileInActiveUnidirectional(Executor executor) throws Throwable {
+        testCloseFromClientWhileInActive(executor, QuicStreamType.UNIDIRECTIONAL, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCloseFromClientWhileInActiveBidirectional(Executor executor) throws Throwable {
+        testCloseFromClientWhileInActive(executor, QuicStreamType.BIDIRECTIONAL, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testHalfCloseFromClientWhileInActiveUnidirectional(Executor executor) throws Throwable {
+        testCloseFromClientWhileInActive(executor, QuicStreamType.UNIDIRECTIONAL, true);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testHalfCloseFromClientWhileInActiveBidirectional(Executor executor) throws Throwable {
+        testCloseFromClientWhileInActive(executor, QuicStreamType.BIDIRECTIONAL, true);
+    }
+
+    private static void testCloseFromClientWhileInActive(Executor executor, QuicStreamType type,
+                                                         boolean halfClose) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        try {
+            final Promise<Channel> streamPromise = ImmediateEventExecutor.INSTANCE.newPromise();
+            QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+            server = QuicTestUtils.newServer(executor, serverHandler, new StreamHandler());
+            channel = QuicTestUtils.newClient(executor);
+
+            StreamCreationHandler creationHandler = new StreamCreationHandler(type, halfClose, streamPromise);
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(creationHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(server.localAddress())
+                    .connect()
+                    .get();
+
+            Channel streamChannel = streamPromise.get();
+
+            // Wait for the steam to close. It needs to happen before the 5-second connection idle timeout.
+            streamChannel.closeFuture().get(3000, TimeUnit.MILLISECONDS);
+
+            streamChannel.parent().close();
+
+            // Wait till the client was closed
+            quicChannel.closeFuture().sync();
+
+            serverHandler.assertState();
+            creationHandler.assertState();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+
+            shutdown(executor);
+        }
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testWriteToUnidirectionalAfterShutdownOutput(Executor executor) throws Throwable {
+        testWriteAfterClosedOrShutdown(executor, QuicStreamType.UNIDIRECTIONAL, true);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testWriteToBidirectionalAfterShutdownOutput(Executor executor) throws Throwable {
+        testWriteAfterClosedOrShutdown(executor, QuicStreamType.BIDIRECTIONAL, true);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testWriteToUnidirectionalAfterClose(Executor executor) throws Throwable {
+        testWriteAfterClosedOrShutdown(executor, QuicStreamType.UNIDIRECTIONAL, false);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testWriteToBidirectionalAfterClose(Executor executor) throws Throwable {
+        testWriteAfterClosedOrShutdown(executor, QuicStreamType.BIDIRECTIONAL, false);
+    }
+
+    private static void testWriteAfterClosedOrShutdown(Executor executor, QuicStreamType type,
+                                                         boolean halfClose) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        try {
+            final Promise<Channel> streamPromise = ImmediateEventExecutor.INSTANCE.newPromise();
+            server = QuicTestUtils.newServer(executor, new ChannelInboundHandlerAdapter(), new StreamHandler());
+            channel = QuicTestUtils.newClient(executor);
+
+            StreamCreationAndTearDownHandler creationHandler =
+                    new StreamCreationAndTearDownHandler(type, halfClose, streamPromise);
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(creationHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(server.localAddress())
+                    .connect()
+                    .get();
+
+            // ChannelOutputShutdownException should only be used when its a BIDIRECTIONAL channel and half-closure
+            // is used.
+            Class<? extends Throwable> causeClass =
+                    halfClose && type != QuicStreamType.UNIDIRECTIONAL ?
+                            ChannelOutputShutdownException.class : ClosedChannelException.class;
+            assertInstanceOf(causeClass, streamPromise.await().cause());
+            quicChannel.close().sync();
+
+            // Wait till the client was closed
+            quicChannel.closeFuture().sync();
+            creationHandler.assertState();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+
+            shutdown(executor);
+        }
+    }
+
+    private static final class StreamCreationAndTearDownHandler extends QuicChannelValidationHandler {
+        private final QuicStreamType type;
+        private final boolean halfClose;
+        private final Promise<Channel> streamPromise;
+
+        StreamCreationAndTearDownHandler(QuicStreamType type, boolean halfClose, Promise<Channel> streamPromise) {
+            this.type = type;
+            this.halfClose = halfClose;
+            this.streamPromise = streamPromise;
+        }
+
+        @Override
+        public void channelActive(ChannelHandlerContext ctx) {
+            QuicChannel channel = (QuicChannel) ctx.channel();
+            channel.createStream(type, new ChannelInboundHandlerAdapter() {
+                @Override
+                public void channelActive(ChannelHandlerContext ctx)  {
+                    final ChannelFuture future;
+                    if (halfClose) {
+                        future = ((QuicStreamChannel) ctx.channel()).shutdownOutput();
+                    } else {
+                        future = ctx.channel().close();
+                    }
+                    future.addListener(f -> {
+                        ctx.channel().writeAndFlush("Unsupported message").addListener(wf -> {
+                            streamPromise.setFailure(wf.cause());
+                        });
+                    });
+                }
+            });
+        }
+    }
+
+    private static final class StreamCreationHandler extends QuicChannelValidationHandler {
+        private final QuicStreamType type;
+        private final boolean halfClose;
+        private final Promise<Channel> streamPromise;
+
+        StreamCreationHandler(QuicStreamType type, boolean halfClose, Promise<Channel> streamPromise) {
+            this.type = type;
+            this.halfClose = halfClose;
+            this.streamPromise = streamPromise;
+        }
+
+        @Override
+        public void channelActive(ChannelHandlerContext ctx) {
+            QuicChannel channel = (QuicChannel) ctx.channel();
+            channel.createStream(type, new ChannelInboundHandlerAdapter() {
+                @Override
+                public void channelActive(ChannelHandlerContext ctx)  {
+                    streamPromise.trySuccess(ctx.channel());
+                    // Do the write and close the channel
+                    ctx.writeAndFlush(Unpooled.buffer().writeZero(8))
+                            .addListener(halfClose
+                                    ? QuicStreamChannel.SHUTDOWN_OUTPUT
+                                    : ChannelFutureListener.CLOSE);
+                }
+            });
+        }
+    }
+
+    private static final class StreamHandler extends ChannelInboundHandlerAdapter {
+
+        @Override
+        public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
+            if (evt == ChannelInputShutdownReadComplete.INSTANCE) {
+                // Received a FIN
+                ctx.close();
+            }
+        }
+
+        @Override
+        public void channelRead(ChannelHandlerContext ctx, Object msg) {
+            ReferenceCountUtil.release(msg);
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicStreamChannelCreationTest.java

@@ -0,0 +1,132 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.ChannelOption;
+import io.netty.util.AttributeKey;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.net.InetSocketAddress;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class QuicStreamChannelCreationTest extends AbstractQuicTest {
+
+    private static final AttributeKey<String> ATTRIBUTE_KEY = AttributeKey.newInstance("testKey");
+    private static final String ATTRIBUTE_VALUE = "Test";
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCreateStream(Executor executor) throws Throwable {
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+        Channel server = QuicTestUtils.newServer(executor, serverHandler,
+                new ChannelInboundHandlerAdapter());
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+        Channel channel = QuicTestUtils.newClient(executor);
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+
+        try {
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(address)
+                    .connect()
+                    .get();
+            CountDownLatch latch = new CountDownLatch(1);
+            QuicStreamChannel stream = quicChannel.createStream(QuicStreamType.UNIDIRECTIONAL,
+                    new ChannelInboundHandlerAdapter() {
+               @Override
+               public void channelRegistered(ChannelHandlerContext ctx) {
+                   assertQuicStreamChannel((QuicStreamChannel) ctx.channel(),
+                           QuicStreamType.UNIDIRECTIONAL, Boolean.TRUE, null);
+                   latch.countDown();
+               }
+            }).sync().get();
+            assertQuicStreamChannel(stream, QuicStreamType.UNIDIRECTIONAL, Boolean.TRUE, null);
+            latch.await();
+            stream.close().sync();
+            quicChannel.close().sync();
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            server.close().sync();
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+
+            shutdown(executor);
+        }
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCreateStreamViaBootstrap(Executor executor) throws Throwable {
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+        Channel server = QuicTestUtils.newServer(executor, serverHandler,
+                new ChannelInboundHandlerAdapter());
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+        Channel channel = QuicTestUtils.newClient(executor);
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+
+        try {
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(address)
+                    .connect()
+                    .get();
+            CountDownLatch latch = new CountDownLatch(1);
+            QuicStreamChannel stream = quicChannel.newStreamBootstrap()
+                    .type(QuicStreamType.UNIDIRECTIONAL)
+                    .attr(ATTRIBUTE_KEY, ATTRIBUTE_VALUE)
+                    .option(ChannelOption.AUTO_READ,  Boolean.FALSE)
+                    .handler(new ChannelInboundHandlerAdapter() {
+                        @Override
+                        public void channelRegistered(ChannelHandlerContext ctx) {
+                            assertQuicStreamChannel((QuicStreamChannel) ctx.channel(),
+                                    QuicStreamType.UNIDIRECTIONAL, Boolean.FALSE, ATTRIBUTE_VALUE);
+                            latch.countDown();
+                        }
+                    }).create().sync().get();
+            assertQuicStreamChannel(stream, QuicStreamType.UNIDIRECTIONAL, Boolean.FALSE, ATTRIBUTE_VALUE);
+            latch.await();
+            stream.close().sync();
+            quicChannel.close().sync();
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            server.close().syncUninterruptibly();
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+
+            shutdown(executor);
+        }
+    }
+
+    private static void assertQuicStreamChannel(QuicStreamChannel channel, QuicStreamType expectedType,
+                                                Boolean expectedAutoRead, String expectedAttribute) {
+        assertEquals(expectedType, channel.type());
+        assertEquals(expectedAutoRead, channel.config().getOption(ChannelOption.AUTO_READ));
+        assertEquals(expectedAttribute, channel.attr(ATTRIBUTE_KEY).get());
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicStreamFrameTest.java

@@ -0,0 +1,143 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.socket.ChannelInputShutdownReadComplete;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.Executor;
+import java.util.concurrent.LinkedBlockingQueue;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+
+public class QuicStreamFrameTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCloseHalfClosureUnidirectional(Executor executor) throws Throwable {
+        testCloseHalfClosure(executor, QuicStreamType.UNIDIRECTIONAL);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCloseHalfClosureBidirectional(Executor executor) throws Throwable {
+        testCloseHalfClosure(executor, QuicStreamType.BIDIRECTIONAL);
+    }
+
+    private static void testCloseHalfClosure(Executor executor, QuicStreamType type) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+        QuicChannelValidationHandler clientHandler = new StreamCreationHandler(type);
+        try {
+            StreamHandler handler = new StreamHandler();
+            server = QuicTestUtils.newServer(executor, serverHandler, handler);
+            channel = QuicTestUtils.newClient(executor);
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(server.localAddress())
+                    .connect()
+                    .get();
+
+            handler.assertSequence();
+            quicChannel.closeFuture().sync();
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+
+            shutdown(executor);
+        }
+    }
+
+    private static final class StreamCreationHandler extends QuicChannelValidationHandler {
+        private final QuicStreamType type;
+
+        StreamCreationHandler(QuicStreamType type) {
+            this.type = type;
+        }
+
+        @Override
+        public void channelActive(ChannelHandlerContext ctx) {
+            QuicChannel channel = (QuicChannel) ctx.channel();
+            channel.createStream(type, new ChannelInboundHandlerAdapter() {
+                @Override
+                public void channelActive(ChannelHandlerContext ctx)  {
+                    // Do the write and close the channel
+                    ctx.writeAndFlush(Unpooled.buffer().writeZero(8))
+                            .addListener(QuicStreamChannel.SHUTDOWN_OUTPUT);
+                }
+            });
+        }
+    }
+
+    private static final class StreamHandler extends ChannelInboundHandlerAdapter {
+        private final BlockingQueue<Integer> queue = new LinkedBlockingQueue<>();
+
+        @Override
+        public void channelRegistered(ChannelHandlerContext ctx) {
+            ctx.channel().config().setOption(QuicChannelOption.READ_FRAMES, true);
+            queue.add(0);
+        }
+
+        @Override
+        public void channelInactive(ChannelHandlerContext ctx) {
+            queue.add(3);
+            // Close the QUIC channel as well.
+            ctx.channel().parent().close();
+        }
+
+        @Override
+        public void userEventTriggered(ChannelHandlerContext ctx, Object evt) {
+            if (evt == ChannelInputShutdownReadComplete.INSTANCE) {
+                queue.add(2);
+                if (((QuicStreamChannel) ctx.channel()).type() == QuicStreamType.BIDIRECTIONAL) {
+                    // Let's write back a fin which will also close the channel and so call channelInactive(...)
+                    ctx.writeAndFlush(new DefaultQuicStreamFrame(Unpooled.EMPTY_BUFFER, true));
+                }
+                ctx.channel().parent().close();
+            }
+        }
+
+        @Override
+        public void channelRead(ChannelHandlerContext ctx, Object msg) {
+            QuicStreamFrame frame = (QuicStreamFrame) msg;
+            if (frame.hasFin()) {
+                queue.add(1);
+            }
+            frame.release();
+        }
+
+        void assertSequence() throws Exception {
+            assertEquals(0, (int) queue.take());
+            assertEquals(1, (int) queue.take());
+            assertEquals(2, (int) queue.take());
+            assertEquals(3, (int) queue.take());
+            assertTrue(queue.isEmpty());
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicStreamHalfClosureTest.java

@@ -0,0 +1,155 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFutureListener;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.socket.ChannelInputShutdownEvent;
+import io.netty.channel.socket.ChannelInputShutdownReadComplete;
+import io.netty.util.ReferenceCountUtil;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.Executor;
+import java.util.concurrent.LinkedBlockingQueue;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class QuicStreamHalfClosureTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCloseHalfClosureUnidirectional(Executor executor) throws Throwable {
+        testCloseHalfClosure(executor, QuicStreamType.UNIDIRECTIONAL);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCloseHalfClosureBidirectional(Executor executor) throws Throwable {
+        testCloseHalfClosure(executor, QuicStreamType.BIDIRECTIONAL);
+    }
+
+    private static void testCloseHalfClosure(Executor executor, QuicStreamType type) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+        QuicChannelValidationHandler clientHandler = new StreamCreationHandler(type);
+        try {
+            StreamHandler handler = new StreamHandler();
+            server = QuicTestUtils.newServer(executor, serverHandler, handler);
+            channel = QuicTestUtils.newClient(executor);
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(server.localAddress())
+                    .connect()
+                    .get();
+
+            handler.assertSequence();
+            quicChannel.closeFuture().sync();
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+
+            shutdown(executor);
+        }
+    }
+
+    private static final class StreamCreationHandler extends QuicChannelValidationHandler {
+        private final QuicStreamType type;
+
+        StreamCreationHandler(QuicStreamType type) {
+            this.type = type;
+        }
+
+        @Override
+        public void channelActive(ChannelHandlerContext ctx) {
+            QuicChannel channel = (QuicChannel) ctx.channel();
+            channel.createStream(type, new ChannelInboundHandlerAdapter() {
+                @Override
+                public void channelActive(ChannelHandlerContext ctx)  {
+                    // Do the write and close the channel
+                    ctx.writeAndFlush(Unpooled.buffer().writeZero(8))
+                            .addListener(ChannelFutureListener.CLOSE);
+                }
+            });
+        }
+    }
+
+    private static final class StreamHandler extends ChannelInboundHandlerAdapter {
+        private final BlockingQueue<Integer> queue = new LinkedBlockingQueue<>();
+
+        @Override
+        public void channelRegistered(ChannelHandlerContext ctx) {
+            queue.add(0);
+        }
+
+        @Override
+        public void channelInactive(ChannelHandlerContext ctx) {
+            queue.add(5);
+            // Close the QUIC channel as well.
+            ctx.channel().parent().close();
+        }
+
+        @Override
+        public void channelRead(ChannelHandlerContext ctx, Object msg) {
+            ReferenceCountUtil.release(msg);
+            if (((QuicStreamChannel) ctx.channel()).isInputShutdown()) {
+                queue.add(1);
+            }
+        }
+
+        @Override
+        public void userEventTriggered(ChannelHandlerContext ctx, Object evt) {
+            if (evt == ChannelInputShutdownEvent.INSTANCE) {
+                addIsShutdown(ctx);
+                queue.add(3);
+            } else if (evt == ChannelInputShutdownReadComplete.INSTANCE) {
+                queue.add(4);
+                ctx.close();
+            }
+        }
+
+        private void addIsShutdown(ChannelHandlerContext ctx) {
+            if (((QuicStreamChannel) ctx.channel()).isInputShutdown()) {
+                queue.add(2);
+            }
+        }
+
+        void assertSequence() throws Exception {
+            assertEquals(0, (int) queue.take());
+            int value = queue.take();
+            if (value == 1) {
+                // If we did see the value of 1 it should be followed by 2 directly.
+                assertEquals(2, (int) queue.take());
+            } else {
+                assertEquals(2, value);
+            }
+            assertEquals(3, (int) queue.take());
+            assertEquals(4, (int) queue.take());
+            assertEquals(5, (int) queue.take());
+            assertTrue(queue.isEmpty());
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicStreamIdGeneratorTest.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class QuicStreamIdGeneratorTest extends AbstractQuicTest {
+
+    @Test
+    public void testServerStreamIds() {
+        QuicStreamIdGenerator generator = new QuicStreamIdGenerator(true);
+        assertEquals(1, generator.nextStreamId(true));
+        assertEquals(5, generator.nextStreamId(true));
+        assertEquals(3, generator.nextStreamId(false));
+        assertEquals(9, generator.nextStreamId(true));
+        assertEquals(7, generator.nextStreamId(false));
+    }
+
+    @Test
+    public void testClientStreamIds() {
+        QuicStreamIdGenerator generator = new QuicStreamIdGenerator(false);
+        assertEquals(0, generator.nextStreamId(true));
+        assertEquals(4, generator.nextStreamId(true));
+        assertEquals(2, generator.nextStreamId(false));
+        assertEquals(8, generator.nextStreamId(true));
+        assertEquals(6, generator.nextStreamId(false));
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicStreamLimitTest.java

@@ -0,0 +1,193 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.socket.ChannelInputShutdownReadComplete;
+import io.netty.util.concurrent.Future;
+import io.netty.util.concurrent.ImmediateEventExecutor;
+import io.netty.util.concurrent.Promise;
+import org.hamcrest.CoreMatchers;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class QuicStreamLimitTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testStreamLimitEnforcedWhenCreatingViaClientBidirectional(Executor executor) throws Throwable {
+        testStreamLimitEnforcedWhenCreatingViaClient(executor, QuicStreamType.BIDIRECTIONAL);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testStreamLimitEnforcedWhenCreatingViaClientUnidirectional(Executor executor) throws Throwable {
+        testStreamLimitEnforcedWhenCreatingViaClient(executor, QuicStreamType.UNIDIRECTIONAL);
+    }
+
+    private static void testStreamLimitEnforcedWhenCreatingViaClient(Executor executor, QuicStreamType type) throws Throwable {
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+        Channel server = QuicTestUtils.newServer(
+                QuicTestUtils.newQuicServerBuilder(executor).initialMaxStreamsBidirectional(1)
+                        .initialMaxStreamsUnidirectional(1),
+                InsecureQuicTokenHandler.INSTANCE,
+                serverHandler, new ChannelInboundHandlerAdapter() {
+                    @Override
+                    public boolean isSharable() {
+                        return true;
+                    }
+
+                    @Override
+                    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
+                        if (evt == ChannelInputShutdownReadComplete.INSTANCE) {
+                            ctx.close();
+                        }
+                    }
+                });
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+        Channel channel = QuicTestUtils.newClient(executor);
+
+        CountDownLatch latch = new CountDownLatch(1);
+        CountDownLatch latch2 = new CountDownLatch(1);
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler() {
+            @Override
+            public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
+                if (evt instanceof QuicStreamLimitChangedEvent) {
+                    if (latch.getCount() == 0) {
+                        latch2.countDown();
+                    } else {
+                        latch.countDown();
+                    }
+                }
+                super.userEventTriggered(ctx, evt);
+            }
+        };
+        try {
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(address)
+                    .connect().get();
+            latch.await();
+            assertEquals(1, quicChannel.peerAllowedStreams(QuicStreamType.UNIDIRECTIONAL));
+            assertEquals(1, quicChannel.peerAllowedStreams(QuicStreamType.BIDIRECTIONAL));
+            QuicStreamChannel stream = quicChannel.createStream(
+                    type, new ChannelInboundHandlerAdapter()).get();
+
+            assertEquals(0, quicChannel.peerAllowedStreams(type));
+
+            // Second stream creation should fail.
+            Throwable cause = quicChannel.createStream(
+                    type, new ChannelInboundHandlerAdapter()).await().cause();
+            assertThat(cause, CoreMatchers.instanceOf(IOException.class));
+            stream.close().sync();
+            latch2.await();
+
+            assertEquals(1, quicChannel.peerAllowedStreams(type));
+            quicChannel.close().sync();
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            server.close().sync();
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+
+            shutdown(executor);
+        }
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testStreamLimitEnforcedWhenCreatingViaServerBidirectional(Executor executor) throws Throwable {
+        testStreamLimitEnforcedWhenCreatingViaServer(executor, QuicStreamType.BIDIRECTIONAL);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testStreamLimitEnforcedWhenCreatingViaServerUnidirectional(Executor executor) throws Throwable {
+        testStreamLimitEnforcedWhenCreatingViaServer(executor, QuicStreamType.UNIDIRECTIONAL);
+    }
+
+    private static void testStreamLimitEnforcedWhenCreatingViaServer(Executor executor, QuicStreamType type) throws Throwable {
+        Promise<Void> streamPromise = ImmediateEventExecutor.INSTANCE.newPromise();
+        Promise<Throwable> stream2Promise = ImmediateEventExecutor.INSTANCE.newPromise();
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler() {
+            @Override
+            public void channelActive(ChannelHandlerContext ctx) {
+                QuicChannel channel = (QuicChannel) ctx.channel();
+                channel.createStream(type, new ChannelInboundHandlerAdapter())
+                        .addListener((Future<QuicStreamChannel> future) -> {
+                            if (future.isSuccess()) {
+                                QuicStreamChannel stream = future.getNow();
+                                streamPromise.setSuccess(null);
+                                channel.createStream(type, new ChannelInboundHandlerAdapter())
+                                        .addListener((Future<QuicStreamChannel> f) -> {
+                                            stream.close();
+                                            stream2Promise.setSuccess(f.cause());
+                                        });
+                            } else {
+                                streamPromise.setFailure(future.cause());
+                            }
+                        });
+            }
+        };
+        Channel server = QuicTestUtils.newServer(
+                QuicTestUtils.newQuicServerBuilder(executor),
+                InsecureQuicTokenHandler.INSTANCE,
+                serverHandler, new ChannelInboundHandlerAdapter() {
+                    @Override
+                    public boolean isSharable() {
+                        return true;
+                    }
+                });
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+        Channel channel = QuicTestUtils.newClient(QuicTestUtils.newQuicClientBuilder(executor)
+                .initialMaxStreamsBidirectional(1).initialMaxStreamsUnidirectional(1));
+
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+        try {
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(address)
+                    .connect().get();
+            streamPromise.sync();
+            // Second stream creation should fail.
+            assertThat(stream2Promise.get(), CoreMatchers.instanceOf(IOException.class));
+            quicChannel.close().sync();
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            server.close().sync();
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+
+            shutdown(executor);
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicStreamShutdownTest.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2023 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelFutureListener;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class QuicStreamShutdownTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testShutdownInputClosureCausesStreamStopped(Executor executor) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        CountDownLatch latch = new CountDownLatch(2);
+        try {
+            server = QuicTestUtils.newServer(executor, new ChannelInboundHandlerAdapter(), new ChannelInboundHandlerAdapter() {
+                @Override
+                public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+                    ChannelFutureListener futureListener = new ChannelFutureListener() {
+                        @Override
+                        public void operationComplete(ChannelFuture channelFuture) {
+                            Throwable cause = channelFuture.cause();
+                            if (cause instanceof QuicException &&
+                                    ((QuicException) cause).error() == QuicError.STREAM_STOPPED) {
+                                latch.countDown();
+                            }
+                        }
+                    };
+                    ByteBuf buffer = (ByteBuf) msg;
+                    ctx.write(buffer.retainedDuplicate()).addListener(futureListener);
+                    ctx.writeAndFlush(buffer).addListener(futureListener);
+                }
+            });
+            channel = QuicTestUtils.newClient(executor);
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(new ChannelInboundHandlerAdapter())
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(server.localAddress())
+                    .connect()
+                    .get();
+
+            QuicStreamChannel streamChannel = quicChannel.createStream(QuicStreamType.BIDIRECTIONAL,
+                    new ChannelInboundHandlerAdapter()).sync().getNow();
+            streamChannel.shutdownInput().sync();
+            assertTrue(streamChannel.isInputShutdown());
+            streamChannel.writeAndFlush(Unpooled.buffer().writeLong(8)).sync();
+
+            latch.await();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+
+            shutdown(executor);
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicStreamTypeTest.java

@@ -0,0 +1,157 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.util.ReferenceCountUtil;
+import io.netty.util.concurrent.ImmediateEventExecutor;
+import io.netty.util.concurrent.Promise;
+import io.netty.util.concurrent.PromiseNotifier;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.concurrent.Executor;
+
+import static org.hamcrest.CoreMatchers.instanceOf;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+
+public class QuicStreamTypeTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testUnidirectionalCreatedByClient(Executor executor) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+
+        try {
+            Promise<Throwable> serverWritePromise = ImmediateEventExecutor.INSTANCE.newPromise();
+            server = QuicTestUtils.newServer(executor, serverHandler, new ChannelInboundHandlerAdapter() {
+                @Override
+                public void channelActive(ChannelHandlerContext ctx) {
+                    QuicStreamChannel channel = (QuicStreamChannel) ctx.channel();
+                    assertEquals(QuicStreamType.UNIDIRECTIONAL, channel.type());
+                    assertFalse(channel.isLocalCreated());
+                    ctx.writeAndFlush(Unpooled.buffer().writeZero(8))
+                            .addListener(future -> serverWritePromise.setSuccess(future.cause()));
+                }
+
+                @Override
+                public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                    ReferenceCountUtil.release(msg);
+                }
+            });
+
+            channel = QuicTestUtils.newClient(executor);
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(server.localAddress())
+                    .connect()
+                    .sync()
+                    .get();
+            QuicStreamChannel streamChannel = quicChannel.createStream(
+                    QuicStreamType.UNIDIRECTIONAL, new ChannelInboundHandlerAdapter()).get();
+            // Do the write which should succeed
+            streamChannel.writeAndFlush(Unpooled.buffer().writeZero(8)).sync();
+
+            // Close stream and quic channel
+            streamChannel.close().sync();
+            quicChannel.close().sync();
+            assertThat(serverWritePromise.get(), instanceOf(UnsupportedOperationException.class));
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+        }
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testUnidirectionalCreatedByServer(Executor executor) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        Promise<Void> serverWritePromise = ImmediateEventExecutor.INSTANCE.newPromise();
+        Promise<Throwable> clientWritePromise = ImmediateEventExecutor.INSTANCE.newPromise();
+
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler() {
+            @Override
+            public void channelActive(ChannelHandlerContext ctx) {
+                QuicChannel channel = (QuicChannel) ctx.channel();
+                channel.createStream(QuicStreamType.UNIDIRECTIONAL, new ChannelInboundHandlerAdapter() {
+                    @Override
+                    public void channelActive(ChannelHandlerContext ctx) {
+                        // Do the write which should succeed
+                        ctx.writeAndFlush(Unpooled.buffer().writeZero(8))
+                                .addListener(new PromiseNotifier<>(serverWritePromise));
+                    }
+                });
+            }
+        };
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+        try {
+            server = QuicTestUtils.newServer(executor, serverHandler, new ChannelInboundHandlerAdapter());
+
+            channel = QuicTestUtils.newClient(executor);
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter() {
+                        @Override
+                        public void channelActive(ChannelHandlerContext ctx) {
+                            // Do the write should fail
+                            ctx.writeAndFlush(Unpooled.buffer().writeZero(8))
+                                    .addListener(future -> clientWritePromise.setSuccess(future.cause()));
+                        }
+
+                        @Override
+                        public void channelInactive(ChannelHandlerContext ctx) {
+                            // Close the QUIC channel as well.
+                            ctx.channel().parent().close();
+                        }
+
+                        @Override
+                        public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                            ReferenceCountUtil.release(msg);
+                            // Let's close the stream
+                            ctx.close();
+                        }
+                    })
+                    .remoteAddress(server.localAddress())
+                    .connect()
+                    .get();
+
+            quicChannel.closeFuture().sync();
+            assertTrue(serverWritePromise.await().isSuccess());
+            assertThat(clientWritePromise.get(), instanceOf(UnsupportedOperationException.class));
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicTest.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.channel.ChannelOption;
+import io.netty.util.AttributeKey;
+import org.junit.jupiter.api.Test;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class QuicTest extends AbstractQuicTest {
+
+    @Test
+    public void test() {
+        Quic.ensureAvailability();
+        assertNotNull(Quiche.quiche_version());
+    }
+
+    @Test
+    public void testVersionSupported() {
+        // Only v1 should be supported.
+        assertFalse(Quic.isVersionSupported(0xff00_001c));
+        assertFalse(Quic.isVersionSupported(0xff00_001d));
+        assertFalse(Quic.isVersionSupported(0xff00_001c));
+        assertTrue(Quic.isVersionSupported(0x0000_0001));
+    }
+
+    @Test
+    public void testToAttributesArrayDoesCopy() {
+        AttributeKey<String> key = AttributeKey.valueOf(UUID.randomUUID().toString());
+        String value = "testValue";
+        Map<AttributeKey<?>, Object> attributes = new HashMap<>();
+        attributes.put(key, value);
+        Map.Entry<AttributeKey<?>, Object>[] array = Quic.toAttributesArray(attributes);
+        assertEquals(1, array.length);
+        attributes.put(key, "newTestValue");
+        Map.Entry<AttributeKey<?>, Object> entry = array[0];
+        assertEquals(key, entry.getKey());
+        assertEquals(value, entry.getValue());
+    }
+
+    @Test
+    public void testToOptionsArrayDoesCopy() {
+        Map<ChannelOption<?>, Object> options = new HashMap<>();
+        options.put(ChannelOption.AUTO_READ, true);
+        Map.Entry<ChannelOption<?>, Object>[] array = Quic.toOptionsArray(options);
+        assertEquals(1, array.length);
+        options.put(ChannelOption.AUTO_READ, false);
+        Map.Entry<ChannelOption<?>, Object> entry = array[0];
+        assertEquals(ChannelOption.AUTO_READ, entry.getKey());
+        assertEquals(true, entry.getValue());
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicTestUtils.java

@@ -0,0 +1,189 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.bootstrap.Bootstrap;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelOption;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.FixedRecvByteBufAllocator;
+import io.netty.channel.epoll.Epoll;
+import io.netty.channel.epoll.EpollChannelOption;
+import io.netty.channel.epoll.EpollDatagramChannel;
+import io.netty.channel.epoll.EpollEventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.nio.NioDatagramChannel;
+import io.netty.handler.ssl.bouncycastle.SelfSignedCertificate;
+import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
+import io.netty.util.NetUtil;
+
+import java.net.InetSocketAddress;
+import java.util.concurrent.Executor;
+import java.util.concurrent.TimeUnit;
+
+final class QuicTestUtils {
+    static final String[] PROTOS = new String[]{"hq-29"};
+    static final SelfSignedCertificate SELF_SIGNED_CERTIFICATE;
+
+    private static final int DATAGRAM_SIZE = 2048;
+
+    static {
+        SelfSignedCertificate cert;
+        try {
+            cert = new SelfSignedCertificate();
+        } catch (Exception e) {
+            throw new ExceptionInInitializerError(e);
+        }
+        SELF_SIGNED_CERTIFICATE = cert;
+    }
+
+    private QuicTestUtils() {
+    }
+
+    private static final EventLoopGroup GROUP = Epoll.isAvailable() ? new EpollEventLoopGroup() :
+            new NioEventLoopGroup();
+
+    static {
+        Runtime.getRuntime().addShutdownHook(new Thread() {
+            @Override
+            public void run() {
+                try {
+                    GROUP.shutdownGracefully().sync();
+                } catch (InterruptedException e) {
+                    Thread.currentThread().interrupt();
+                }
+            }
+        });
+    }
+
+    static Channel newClient(Executor sslTaskExecutor) throws Exception {
+        return newClient(newQuicClientBuilder(sslTaskExecutor));
+    }
+
+    private static Bootstrap newBootstrap() {
+        Bootstrap bs = new Bootstrap();
+        if (GROUP instanceof EpollEventLoopGroup) {
+            bs.channel(EpollDatagramChannel.class)
+                    // Use recvmmsg when possible.
+                    .option(EpollChannelOption.MAX_DATAGRAM_PAYLOAD_SIZE, DATAGRAM_SIZE)
+                    .option(ChannelOption.RCVBUF_ALLOCATOR, new FixedRecvByteBufAllocator(DATAGRAM_SIZE * 8));
+        } else {
+            bs.channel(NioDatagramChannel.class)
+                    .option(ChannelOption.RCVBUF_ALLOCATOR, new FixedRecvByteBufAllocator(DATAGRAM_SIZE));
+        }
+        return bs.group(GROUP);
+    }
+
+    static Channel newClient(QuicClientCodecBuilder builder) throws Exception {
+        return newBootstrap()
+                // We don't want any special handling of the channel so just use a dummy handler.
+                .handler(builder.build())
+                .bind(new InetSocketAddress(NetUtil.LOCALHOST4, 0)).sync().channel();
+    }
+
+    static QuicChannelBootstrap newQuicChannelBootstrap(Channel channel) {
+        QuicChannelBootstrap bs = QuicChannel.newBootstrap(channel);
+        if (GROUP instanceof EpollEventLoopGroup) {
+            bs.option(QuicChannelOption.SEGMENTED_DATAGRAM_PACKET_ALLOCATOR,
+                    EpollQuicUtils.newSegmentedAllocator(10));
+        }
+        return bs;
+    }
+
+    static QuicClientCodecBuilder newQuicClientBuilder(Executor sslTaskExecutor) {
+        return newQuicClientBuilder(sslTaskExecutor, QuicSslContextBuilder.forClient()
+                .trustManager(InsecureTrustManagerFactory.INSTANCE).applicationProtocols(PROTOS).build());
+    }
+
+    static QuicClientCodecBuilder newQuicClientBuilder(Executor sslTaskExecutor, QuicSslContext sslContext) {
+        return new QuicClientCodecBuilder()
+                .sslEngineProvider(q -> sslContext.newEngine(q.alloc()))
+                .maxIdleTimeout(5000, TimeUnit.MILLISECONDS)
+                .initialMaxData(10000000)
+                .initialMaxStreamDataBidirectionalLocal(1000000)
+                .initialMaxStreamDataBidirectionalRemote(1000000)
+                .initialMaxStreamsBidirectional(100)
+                .initialMaxStreamsUnidirectional(100)
+                .initialMaxStreamDataUnidirectional(1000000)
+                .activeMigration(false).sslTaskExecutor(sslTaskExecutor);
+    }
+
+    static QuicServerCodecBuilder newQuicServerBuilder(Executor sslTaskExecutor) {
+        return newQuicServerBuilder(sslTaskExecutor, QuicSslContextBuilder.forServer(
+                SELF_SIGNED_CERTIFICATE.privateKey(), null, SELF_SIGNED_CERTIFICATE.certificate())
+                .applicationProtocols(PROTOS).build());
+    }
+
+    static QuicServerCodecBuilder newQuicServerBuilder(Executor sslTaskExecutor, QuicSslContext context) {
+        QuicServerCodecBuilder builder = new QuicServerCodecBuilder()
+                .sslEngineProvider(q -> context.newEngine(q.alloc()))
+                .maxIdleTimeout(5000, TimeUnit.MILLISECONDS)
+                .initialMaxData(10000000)
+                .initialMaxStreamDataBidirectionalLocal(1000000)
+                .initialMaxStreamDataBidirectionalRemote(1000000)
+                .initialMaxStreamDataUnidirectional(1000000)
+                .initialMaxStreamsBidirectional(100)
+                .initialMaxStreamsUnidirectional(100)
+                .activeMigration(false)
+                .sslTaskExecutor(sslTaskExecutor);
+        if (GROUP instanceof EpollEventLoopGroup) {
+            builder.option(QuicChannelOption.SEGMENTED_DATAGRAM_PACKET_ALLOCATOR,
+                    EpollQuicUtils.newSegmentedAllocator(10));
+        }
+        return builder;
+    }
+
+    private static Bootstrap newServerBootstrap(QuicServerCodecBuilder serverBuilder,
+                                                QuicTokenHandler tokenHandler, ChannelHandler handler,
+                                                ChannelHandler streamHandler) {
+        serverBuilder.tokenHandler(tokenHandler)
+                .streamHandler(streamHandler);
+        if (handler != null) {
+            serverBuilder.handler(handler);
+        }
+        ChannelHandler codec = serverBuilder.build();
+        return newBootstrap()
+                // We don't want any special handling of the channel so just use a dummy handler.
+                .handler(codec)
+                .localAddress(new InetSocketAddress(NetUtil.LOCALHOST4, 0));
+    }
+
+    static Channel newServer(QuicServerCodecBuilder serverBuilder, QuicTokenHandler tokenHandler,
+                             ChannelHandler handler, ChannelHandler streamHandler)
+            throws Exception {
+        return newServerBootstrap(serverBuilder, tokenHandler, handler, streamHandler)
+                .bind().sync().channel();
+    }
+
+    static Channel newServer(Executor sslTaskExecutor, QuicTokenHandler tokenHandler,
+                             ChannelHandler handler, ChannelHandler streamHandler)
+            throws Exception {
+        return newServer(newQuicServerBuilder(sslTaskExecutor), tokenHandler, handler, streamHandler);
+    }
+
+    static Channel newServer(Executor sslTaskExecutor, ChannelHandler handler,
+                             ChannelHandler streamHandler) throws Exception {
+        return newServer(sslTaskExecutor, InsecureQuicTokenHandler.INSTANCE, handler, streamHandler);
+    }
+
+    static void closeIfNotNull(Channel channel) throws Exception {
+        if (channel != null) {
+            channel.close().sync();
+        }
+    }
+
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicTransportParametersTest.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright 2023 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.util.concurrent.ImmediateEventExecutor;
+import io.netty.util.concurrent.Promise;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.concurrent.Executor;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+public class QuicTransportParametersTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testParameters(Executor executor) throws Throwable {
+        Channel server = null;
+        Channel channel = null;
+        Promise<QuicTransportParameters> serverParams = ImmediateEventExecutor.INSTANCE.newPromise();
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler() {
+            @Override
+            public void channelActive(ChannelHandlerContext ctx) {
+                QuicheQuicChannel channel = (QuicheQuicChannel) ctx.channel();
+                serverParams.setSuccess(channel.peerTransportParameters());
+                ctx.fireChannelActive();
+            }
+        };
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+        try {
+            server = QuicTestUtils.newServer(executor, serverHandler, new ChannelInboundHandlerAdapter() {
+                @Override
+                public boolean isSharable() {
+                    return true;
+                }
+            });
+            channel = QuicTestUtils.newClient(executor);
+
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(server.localAddress())
+                    .connect().get();
+            assertTransportParameters(quicChannel.peerTransportParameters());
+            assertTransportParameters(serverParams.sync().getNow());
+
+            quicChannel.close().sync();
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            QuicTestUtils.closeIfNotNull(channel);
+            QuicTestUtils.closeIfNotNull(server);
+
+            shutdown(executor);
+        }
+    }
+
+    private static void assertTransportParameters(QuicTransportParameters parameters) {
+        assertNotNull(parameters);
+        assertThat(parameters.maxIdleTimeout(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.maxUdpPayloadSize(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.initialMaxData(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.initialMaxStreamDataBidiLocal(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.initialMaxStreamDataBidiRemote(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.initialMaxStreamDataUni(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.initialMaxStreamsBidi(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.initialMaxStreamsUni(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.ackDelayExponent(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.maxAckDelay(), greaterThanOrEqualTo(1L));
+        assertFalse(parameters.disableActiveMigration());
+        assertThat(parameters.activeConnIdLimit(), greaterThanOrEqualTo(1L));
+        assertThat(parameters.maxDatagramFrameSize(), greaterThanOrEqualTo(0L));
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicWritableTest.java

@@ -0,0 +1,301 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.util.concurrent.ImmediateEventExecutor;
+import io.netty.util.concurrent.Promise;
+import io.netty.util.concurrent.PromiseNotifier;
+import org.junit.jupiter.api.Timeout;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.net.InetSocketAddress;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class QuicWritableTest extends AbstractQuicTest {
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCorrectlyHandleWritabilityReadRequestedInReadComplete(Executor executor) throws Throwable {
+        testCorrectlyHandleWritability(executor, true);
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    public void testCorrectlyHandleWritabilityReadRequestedInRead(Executor executor) throws Throwable {
+        testCorrectlyHandleWritability(executor, false);
+    }
+
+    private static void testCorrectlyHandleWritability(Executor executor, boolean readInComplete) throws Throwable  {
+        int bufferSize = 64 * 1024;
+        Promise<Void> writePromise = ImmediateEventExecutor.INSTANCE.newPromise();
+        final AtomicReference<Throwable> serverErrorRef = new AtomicReference<>();
+        final AtomicReference<Throwable> clientErrorRef = new AtomicReference<>();
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+        Channel server = QuicTestUtils.newServer(
+                QuicTestUtils.newQuicServerBuilder(executor).initialMaxStreamsBidirectional(5000),
+                InsecureQuicTokenHandler.INSTANCE,
+                serverHandler, new ChannelInboundHandlerAdapter() {
+
+                    @Override
+                    public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                        ByteBuf buffer = (ByteBuf) msg;
+                        buffer.release();
+                        ctx.writeAndFlush(ctx.alloc().buffer(bufferSize).writeZero(bufferSize))
+                                .addListener(new PromiseNotifier<>(writePromise));
+                    }
+
+                    @Override
+                    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+                        serverErrorRef.set(cause);
+                    }
+
+                    @Override
+                    public boolean isSharable() {
+                        return true;
+                    }
+                });
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+        Channel channel = QuicTestUtils.newClient(QuicTestUtils.newQuicClientBuilder(executor)
+                .initialMaxStreamDataBidirectionalLocal(bufferSize / 4));
+
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+        try {
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(address)
+                    .connect()
+                    .get();
+            QuicStreamChannel stream = quicChannel.createStream(
+                    QuicStreamType.BIDIRECTIONAL, new ChannelInboundHandlerAdapter() {
+                        int bytes;
+
+                        @Override
+                        public void channelRegistered(ChannelHandlerContext ctx) {
+                            ctx.channel().config().setAutoRead(false);
+                        }
+
+                        @Override
+                        public void channelActive(ChannelHandlerContext ctx) {
+                            ctx.writeAndFlush(ctx.alloc().buffer(8).writeLong(8));
+                        }
+
+                        @Override
+                        public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                            if (bytes == 0) {
+                                // First read
+                                assertFalse(writePromise.isDone());
+                            }
+                            ByteBuf buffer = (ByteBuf) msg;
+                            bytes += buffer.readableBytes();
+                            buffer.release();
+                            if (bytes == bufferSize) {
+                                ctx.close();
+                                assertTrue(writePromise.isDone());
+                            }
+
+                            if (!readInComplete) {
+                                ctx.read();
+                            }
+                        }
+
+                        @Override
+                        public void channelReadComplete(ChannelHandlerContext ctx) {
+                            if (readInComplete) {
+                                ctx.read();
+                            }
+                        }
+
+                        @Override
+                        public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+                            clientErrorRef.set(cause);
+                        }
+                    }).get();
+            assertFalse(writePromise.isDone());
+
+            // Let's trigger the reads. This will ensure we will consume the data and the remote peer
+            // should be notified that it can write more data.
+            stream.read();
+
+            writePromise.sync();
+            stream.closeFuture().sync();
+            quicChannel.close().sync();
+
+            throwIfNotNull(serverErrorRef);
+            throwIfNotNull(clientErrorRef);
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            server.close().sync();
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+
+            shutdown(executor);
+        }
+    }
+
+    @ParameterizedTest
+    @MethodSource("newSslTaskExecutors")
+    @Timeout(value = 5000, unit = TimeUnit.MILLISECONDS)
+    public void testBytesUntilUnwritable(Executor executor) throws Throwable  {
+        Promise<Void> writePromise = ImmediateEventExecutor.INSTANCE.newPromise();
+        final AtomicReference<Throwable> serverErrorRef = new AtomicReference<>();
+        final AtomicReference<Throwable> clientErrorRef = new AtomicReference<>();
+        final CountDownLatch writableAgainLatch = new CountDownLatch(1);
+        int firstWriteNumBytes = 8;
+        int maxData = 32 * 1024;
+        final AtomicLong beforeWritableRef = new AtomicLong();
+        QuicChannelValidationHandler serverHandler = new QuicChannelValidationHandler();
+        Channel server = QuicTestUtils.newServer(
+                QuicTestUtils.newQuicServerBuilder(executor).initialMaxStreamsBidirectional(5000),
+                InsecureQuicTokenHandler.INSTANCE,
+                serverHandler, new ChannelInboundHandlerAdapter() {
+
+                    private int numBytesRead;
+                    @Override
+                    public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                        ByteBuf buffer = (ByteBuf) msg;
+                        numBytesRead += buffer.readableBytes();
+                        buffer.release();
+                        if (numBytesRead == firstWriteNumBytes) {
+                            long before = ctx.channel().bytesBeforeUnwritable();
+                            beforeWritableRef.set(before);
+                            assertTrue(before > 0);
+
+                            while (before != 0) {
+                                int size = (int) Math.min(before, 1024);
+                                ctx.write(ctx.alloc().buffer(size).writeZero(size));
+                                long newBefore = ctx.channel().bytesBeforeUnwritable();
+
+                                assertEquals(before, newBefore + size);
+                                before = newBefore;
+                            }
+                            ctx.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(new PromiseNotifier<>(writePromise));
+                        }
+                    }
+
+                    @Override
+                    public void channelWritabilityChanged(ChannelHandlerContext ctx) {
+                        if (ctx.channel().isWritable()) {
+                            if (ctx.channel().bytesBeforeUnwritable() > 0) {
+                                writableAgainLatch.countDown();
+                            }
+                        }
+                    }
+
+                    @Override
+                    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+                        serverErrorRef.set(cause);
+                    }
+
+                    @Override
+                    public boolean isSharable() {
+                        return true;
+                    }
+                });
+        InetSocketAddress address = (InetSocketAddress) server.localAddress();
+        Channel channel = QuicTestUtils.newClient(QuicTestUtils.newQuicClientBuilder(executor)
+                .initialMaxStreamDataBidirectionalLocal(maxData));
+
+        QuicChannelValidationHandler clientHandler = new QuicChannelValidationHandler();
+        try {
+            QuicChannel quicChannel = QuicTestUtils.newQuicChannelBootstrap(channel)
+                    .handler(clientHandler)
+                    .streamHandler(new ChannelInboundHandlerAdapter())
+                    .remoteAddress(address)
+                    .connect()
+                    .get();
+            QuicStreamChannel stream = quicChannel.createStream(
+                    QuicStreamType.BIDIRECTIONAL, new ChannelInboundHandlerAdapter() {
+                        int bytes;
+
+                        @Override
+                        public void channelRegistered(ChannelHandlerContext ctx) {
+                            ctx.channel().config().setAutoRead(false);
+                        }
+
+                        @Override
+                        public void channelActive(ChannelHandlerContext ctx) {
+                            ctx.writeAndFlush(ctx.alloc().buffer(firstWriteNumBytes).writeZero(firstWriteNumBytes));
+                        }
+
+                        @Override
+                        public void channelRead(ChannelHandlerContext ctx, Object msg) {
+                            ByteBuf buffer = (ByteBuf) msg;
+                            bytes += buffer.readableBytes();
+                            buffer.release();
+                            if (bytes == beforeWritableRef.get()) {
+                                assertTrue(writePromise.isDone());
+                            }
+                        }
+
+                        @Override
+                        public void channelReadComplete(ChannelHandlerContext ctx) {
+                            ctx.read();
+                        }
+
+                        @Override
+                        public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+                            clientErrorRef.set(cause);
+                        }
+                    }).get();
+
+            // Let's trigger the reads. This will ensure we will consume the data and the remote peer
+            // should be notified that it can write more data.
+            stream.read();
+
+            writePromise.sync();
+            writableAgainLatch.await();
+            stream.close().sync();
+            stream.closeFuture().sync();
+            quicChannel.close().sync();
+
+            throwIfNotNull(serverErrorRef);
+            throwIfNotNull(clientErrorRef);
+
+            serverHandler.assertState();
+            clientHandler.assertState();
+        } finally {
+            server.close().sync();
+            // Close the parent Datagram channel as well.
+            channel.close().sync();
+
+            shutdown(executor);
+        }
+    }
+
+    private static void throwIfNotNull(AtomicReference<Throwable> errorRef) throws Throwable {
+        Throwable cause = errorRef.get();
+        if (cause != null) {
+            throw cause;
+        }
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicheQuicClientCodecTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 The Netty Project
+ * Copyright 2021 The Netty Project
  *
  * The Netty Project licenses this file to you under the Apache License,
  * version 2.0 (the "License"); you may not use this file except in compliance
@@ -13,16 +13,13 @@
  * License for the specific language governing permissions and limitations
  * under the License.
  */
-package io.netty.channel;
+package io.netty.handler.codec.quic;
 
-import io.netty.nativeimage.ChannelHandlerMetadataUtil;
+import io.netty.util.concurrent.ImmediateExecutor;
-import org.junit.jupiter.api.Test;
 
-public class NativeImageHandlerMetadataTest {
+public class QuicheQuicClientCodecTest extends QuicheQuicCodecTest<QuicClientCodecBuilder> {
-
+    @Override
-    @Test
+    protected QuicClientCodecBuilder newCodecBuilder() {
-    public void collectAndCompareMetadata() {
+        return QuicTestUtils.newQuicClientBuilder(ImmediateExecutor.INSTANCE);
-        ChannelHandlerMetadataUtil.generateMetadata("io.netty.bootstrap", "io.netty.channel");
     }
-
 }

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicheQuicCodecTest.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright 2021 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelOutboundHandlerAdapter;
+import io.netty.channel.embedded.EmbeddedChannel;
+import io.netty.channel.socket.DatagramPacket;
+import org.junit.jupiter.api.Test;
+
+import java.net.InetSocketAddress;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public abstract class QuicheQuicCodecTest<B extends QuicCodecBuilder<B>> extends AbstractQuicTest {
+
+    protected abstract B newCodecBuilder();
+
+    @Test
+    public void testDefaultVersionIsV1() {
+        B builder = newCodecBuilder();
+        assertEquals(0x0000_0001, builder.version);
+    }
+
+    @Test
+    public void testFlushStrategyUsedWithBytes() {
+        testFlushStrategy(true);
+    }
+
+    @Test
+    public void testFlushStrategyUsedWithPackets() {
+        testFlushStrategy(false);
+    }
+
+    private void testFlushStrategy(boolean useBytes) {
+        final int bytes = 8;
+        final AtomicInteger numBytesTracker = new AtomicInteger();
+        final AtomicInteger numPacketsTracker = new AtomicInteger();
+        final AtomicInteger flushCount = new AtomicInteger();
+        B builder = newCodecBuilder();
+        builder.flushStrategy((numPackets, numBytes) -> {
+            numPacketsTracker.set(numPackets);
+            numBytesTracker.set(numBytes);
+            if (useBytes) {
+                return numBytes > 8;
+            }
+            if (numPackets == 2) {
+                return true;
+            }
+            return false;
+        });
+
+        EmbeddedChannel channel = new EmbeddedChannel(new ChannelOutboundHandlerAdapter() {
+            @Override
+            public void flush(ChannelHandlerContext ctx) throws Exception {
+                flushCount.incrementAndGet();
+                super.flush(ctx);
+            }
+        }, builder.build());
+        assertEquals(0, numPacketsTracker.get());
+        assertEquals(0, numBytesTracker.get());
+        assertEquals(0, flushCount.get());
+
+        channel.write(new DatagramPacket(Unpooled.buffer().writeZero(bytes), new InetSocketAddress(0)));
+        assertEquals(1, numPacketsTracker.get());
+        assertEquals(8, numBytesTracker.get());
+        assertEquals(0, flushCount.get());
+
+        channel.write(new DatagramPacket(Unpooled.buffer().writeZero(bytes), new InetSocketAddress(0)));
+        assertEquals(2, numPacketsTracker.get());
+        assertEquals(16, numBytesTracker.get());
+        assertEquals(1, flushCount.get());
+
+        // As a flush did happen we should see two packets in the outbound queue.
+        for (int i = 0; i < 2; i++) {
+            DatagramPacket packet = channel.readOutbound();
+            assertNotNull(packet);
+            packet.release();
+        }
+
+        ChannelFuture future = channel.write(new DatagramPacket(Unpooled.buffer().writeZero(bytes),
+                new InetSocketAddress(0)));
+        assertEquals(1, numPacketsTracker.get());
+        assertEquals(8, numBytesTracker.get());
+        assertEquals(1, flushCount.get());
+
+        // We never flushed the last datagram packet so it should be failed.
+        assertFalse(channel.finish());
+        assertTrue(future.isDone());
+        assertFalse(future.isSuccess());
+    }
+}

netty-handler-codec-quic/src/test/java/io/netty/handler/codec/quic/QuicheQuicServerCodecTest.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2021 The Netty Project
+ *
+ * The Netty Project licenses this file to you 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:
+ *
+ *   https://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.
+ */
+package io.netty.handler.codec.quic;
+
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.util.concurrent.ImmediateExecutor;
+
+public class QuicheQuicServerCodecTest extends QuicheQuicCodecTest<QuicServerCodecBuilder> {
+    @Override
+    protected QuicServerCodecBuilder newCodecBuilder() {
+        return QuicTestUtils.newQuicServerBuilder(ImmediateExecutor.INSTANCE)
+                .streamHandler(new ChannelInboundHandlerAdapter())
+                .tokenHandler(InsecureQuicTokenHandler.INSTANCE);
+    }
+}

netty-handler-codec-quic/src/test/resources/logging.properties

@@ -0,0 +1,7 @@
+handlers=java.util.logging.ConsoleHandler
+.level=ALL
+java.util.logging.SimpleFormatter.format=%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS.%1$tL %4$-7s [%3$s] %5$s %6$s%n
+java.util.logging.ConsoleHandler.level=ALL
+java.util.logging.ConsoleHandler.formatter=java.util.logging.SimpleFormatter
+jdk.event.security.level=INFO
+org.junit.jupiter.engine.execution.ConditionEvaluator.level=OFF

netty-handler-codec-quic/src/test/resources/netty-filter.json

@@ -0,0 +1,6 @@
+{
+    "rules": [
+        {"excludeClasses": "**"},
+        {"includeClasses": "io.netty.handler.codec.quic.**"}
+    ]
+}

netty-handler-codec-quic/src/test/resources/test-class-filter.json

@@ -0,0 +1,12 @@
+{
+    "rules": [
+        {"includeClasses": "**"},
+        {"excludeClasses": "ch.qos.logback.**"},
+        {"excludeClasses": "io.netty.handler.codec.quic.NoValidationQuicTokenHandler"},
+        {"excludeClasses": "io.netty.handler.codec.quic.QuicChannelValidationHandler"},
+        {"excludeClasses": "org.apache.maven.surefire.**"}
+    ],
+    "regexRules": [
+        {"excludeClasses": ".*Test.*"}
+    ]
+}

settings.gradle

@@ -86,3 +86,4 @@ include 'netty-tcnative-boringssl-static-native'
 include 'netty-testsuite'
 include 'netty-util'
 include 'netty-zlib'
+include 'test-results'

test-results/build.gradle

@@ -0,0 +1,45 @@
+plugins {
+    id 'base'
+    id 'test-report-aggregation'
+}
+
+dependencies {
+    testReportAggregation project(':netty-buffer')
+    testReportAggregation project(':netty-bzip2')
+    testReportAggregation project(':netty-channel')
+    testReportAggregation project(':netty-channel-epoll')
+    testReportAggregation project(':netty-channel-sctp')
+    testReportAggregation project(':netty-channel-unix')
+    testReportAggregation project(':netty-handler')
+    testReportAggregation project(':netty-handler-codec')
+    testReportAggregation project(':netty-handler-codec-compression')
+    testReportAggregation project(':netty-handler-codec-dns')
+    testReportAggregation project(':netty-handler-codec-http')
+    testReportAggregation project(':netty-handler-codec-http2')
+    testReportAggregation project(':netty-handler-codec-http3')
+    testReportAggregation project(':netty-handler-codec-quic')
+    testReportAggregation project(':netty-handler-codec-rtsp')
+    testReportAggregation project(':netty-handler-codec-sctp')
+    testReportAggregation project(':netty-handler-codec-spdy')
+    testReportAggregation project(':netty-handler-ssl')
+    testReportAggregation project(':netty-handler-ssl-bouncycastle')
+    testReportAggregation project(':netty-internal-tcnative')
+    testReportAggregation project(':netty-jctools')
+    testReportAggregation project(':netty-resolver')
+    testReportAggregation project(':netty-resolver-dns')
+    testReportAggregation project(':netty-testsuite')
+    testReportAggregation project(':netty-util')
+    testReportAggregation project(':netty-zlib')
+}
+
+reporting {
+    reports {
+        testAggregateTestReport(AggregateTestReport) {
+            testType = TestSuiteType.UNIT_TEST
+        }
+    }
+}
+
+tasks.named('check') {
+    dependsOn tasks.named('testAggregateTestReport', TestReport)
+}