Motivation:
When parsing HEADERS, connection errors can occur (e.g., too large of
headers, such that we don't want to HPACK decode them). These trigger a
GOAWAY with a last-stream-id telling the client which streams haven't
been processed.
Unfortunately that last-stream-id didn't include the stream for the
HEADERS that triggered the error. Since clients are free to silently
retry streams not included in last-stream-id, the client is free to
retransmit the request on a new connection, which will fail the
connection with the wrong last-stream-id, and the client is still free
to retransmit the request.
Modifications:
Have fatal connection errors (those that hard-cut the connection)
include all streams in last-stream-id, which guarantees the HEADERS'
stream is included and thus should not be silently retried by the HTTP/2
client.
This modification is heavy-handed, as it will cause racing streams to
also fail, but alternatives that provide precise last-stream-id tracking
are much more invasive. Hard-cutting the connection is already
heavy-handed and so is rare.
Result:
Fixes#10670
Motivation:
We received a [bug report](https://bugs.chromium.org/p/chromium/issues/detail?id=1143320) from the Chrome team at Google, their canary builds are failing [HTTP/2 GREASE](https://tools.ietf.org/html/draft-bishop-httpbis-grease-00) testing to netflix.com.
The reason it's failing is that Netty can't handle unknown frames without an active stream created. Let me know if you'd like more info, such as stack traces or repro steps.
Modification:
The change is minor and simply ignores unknown frames on the connection stream, similarly to `onWindowUpdateRead`.
Result:
I figured I would just submit a PR rather than filing an issue, but let me know if you want me to do that for tracking purposes.
Motivation:
JUnit 5 is the new hotness. It's more expressive, extensible, and composable in many ways, and it's better able to run tests in parallel. But most importantly, it's able to directly run JUnit 4 tests.
This means we can update and start using JUnit 5 without touching any of our existing tests.
I'm also introducing a dependency on assertj-core, which is like hamcrest, but arguably has a nicer and more discoverable API.
Modification:
Add the JUnit 5 and assertj-core dependencies, without converting any tests at time time.
Result:
All our tests are now executed through the JUnit 5 Vintage Engine.
Also, the JUnit 5 test APIs are available, and any JUnit 5 tests that are added from now on will also be executed.
Motivation:
PoolChunk maintains multiple PriorityQueue<Long> collections. The usage
of PoolChunk#removeAvailRun unboxes the Long values to long, and then
this method uses queue.remove(..) which will auto box the value back to
Long. This creates unnecessary allocations via Long.valueOf(long).
Modifications:
- Adjust method signature and usage of PoolChunk#removeAvailRun to avoid
boxing
Result:
Less allocations as a result of PoolChunk#removeAvailRun.
Motivation:
There is no need for ByteProcessor to throw a checked exception.
The declared checked exception causes unnecessary code complications just to propagate it.
This can be cleaned up.
Modification:
ByteProcessor.process no longer declares to throw a checked exception, and all the places that were trying to cope with the checked exception have been simplified.
Result:
Simpler code.
Motivation:
There is no need for ByteProcessor to throw a checked exception.
The declared checked exception causes unnecessary code complications just to propagate it.
This can be cleaned up.
Modification:
ByteProcessor.process no longer declares to throw a checked exception, and all the places that were trying to cope with the checked exception have been simplified.
Result:
Simpler code.
Motivation:
`HttpConversionUtil#toHttpResponse` translates `Http2Headers` to `HttpResponse`. It uses `#addHttp2ToHttpHeaders(..., boolean isRequest)` to do so. However, `isRequest` field is set to `true` instead of `false`. It should be set to `false` because we're doing conversion of Response not Request.
Modification:
Changed `true` to `false`.
Result:
Correctly translates `Http2Headers` to `HttpResponse`.
Motivation:
We should have the `toString` method in `DefaultHttp2WindowUpdateFrame` because it makes debugging a little easy.
Modification:
Added `toString` method.
Result:
`toString` method to help in debugging.
Co-authored-by: Norman Maurer <norman_maurer@apple.com>
Motivation:
`Http2Frame` has extra empty line after `String name();`. However, it should not be there.
Modification:
Removed extra empty line.
Result:
Empty-line code style now matching with other classes.
Motivation:
`Http2FrameCodec#write(...)` has typo in comment.
`// In the event of manual SETTINGS ACK is is assumed the encoder will apply the earliest received but not`.
The typo is `is is`. However, it should be `it is`.
Modification:
Changed `is is` to `it is`.
Result:
Correct comment without typos.
Motivation:
`Http2DataFrame#isEndStream()` JavaDoc says `Returns {@code true} if the END_STREAM flag ist set.`. The typo is `ist` word. However, it should be `is`.
Modification:
Changed `ist` to `is`.
Result:
Better JavaDoc by fixing the typo.
Motivation:
`Http2HeadersFrame#isEndStream()` JavaDoc says `Returns {@code true} if the END_STREAM flag ist set.`. The typo is `ist` word. However, it should be `is`.
Modification:
Changed `ist` to `is`.
Result:
Better JavaDoc by fixing the typo.
Motivation:
`DefaultChannelId` uses reflection to access the JMX runtime. This needs some extra config for GraalVM.
Modification:
Add config for GraalVM
Result:
Works when using GraalVM native image
Motivation:
Heart-beat is a functionality of STOMP enabling clients and servers to know the healthiness of the connection. The current decoder didn't allow for heart-beat messages to be forwarded to the decoder and were simply swallowed as part of the frame decoding.
Modifications:
Adding support for heartbeat message parsing by introducing a new HEARTBEAT command (not a real STOMP command).
Heartbeat received on the channel will trigger a StompFrame with the command set to HEARTBEAT.
Sending heartbeat on the channel is achieved by creating a StompFrame with the command set to HEARTBEAT.
Result:
Heartbeat can now be received/sent and acted upon to determine the healthiness of the connection and terminate it if needed.
Motivation:
HttpServerUpgradeHandler takes a list of protocols from an incoming
request and uses them for building a response.
Although the class does some validation while parsing the list,
it then disables HTTP header validation when it builds a responst.
The disabled validation may potentially allow
HTTP response splitting attacks.
Modifications:
- Enabled HTTP header validation in HttpServerUpgradeHandler
as a defense-in-depth measure to prevent possible
HTTP response splitting attacks.
- Added a new constructor that allows disabling the validation.
Result:
HttpServerUpgradeHandler validates incoming protocols
before including them into a response.
That should prevent possible HTTP response splitting attacks.
Motivation:
Subscription ID property of the PUBLISH message may be repeated multiple times, which wasn't taken into account when developing `MqttProperties` API.
Modification:
Store Subscription ID properties separately from others - in `MqttProperties.subscriptionIds`.
Add `MqttProperties.getProperties` method to retrieve properties that may be repeated.
Change internal representation of User Properties for uniformity with Subscription ID - now they're stored in `MqttProperties.userProperties` rather than the common hash map.
Result:
Multiple Subscription ID properties can be set or retrieved.
Motivation:
a63faa4fa1 missed to update the macos specific c files for the resolver.
Modifications:
Fix up c files so it compiles again on macos
Result:
Compiles on macos again
Motivation:
We had a lot of duplication in our jni code which was mostly due macros but also related to how we support shading. By using netty-jni-util we can share all the code between netty and netty-tcnative ( and possible other jni based netty projects in the future).
Modifications:
- Use netty-jni-util and re-use its macros / functions
- Remove duplicated code
- Adjust build files
Result:
Less code duplication for JNI
Motivation:
`addHttp2ToHttpHeaders(int streamId, Http2Headers sourceHeaders, FullHttpMessage destinationMessage, boolean addToTrailer)`
should match
`addHttp2ToHttpHeaders(int streamId, Http2Headers inputHeaders, HttpHeaders outputHeaders, HttpVersion httpVersion, boolean isTrailer, boolean isRequest)`.
However, the `Http2Headers` variable name is different.
Modification:
Changed `sourceHeaders` to `inputHeaders`.
Result:
Variable and JavaDoc naming now correct.
Motivation:
Http2ToHttpHeaderTranslator is a private class but translateHeaders(Iterable<Entry<CharSequence, CharSequence>>) is public but it should be package-private.
Modification:
Removed public.
Result:
Correct access modifer.
Motivation:
Some buffers implement ByteBuf#order(order) by wrapping themselves in a SwappedByteBuf.
The SwappedByteBuf is then responsible for swapping the byte order on accesses.
The explicitly little-endian accessor methods, however, should not be swapped to big-endian, but instead remain explicitly little-endian.
Modification:
The SwappedByteBuf was passing through calls to e.g. writeIntLE, to the big-endian equivalent, e.g. writeInt.
This has been changed so that these calls delegate to their explicitly little-endian counterpart.
Result:
This makes all buffers that make use of SwappedByteBuf for their endian-ness configuration, consistent with all the buffers that use other implementation strategies.
In the end, all buffers now behave exactly the same, when using their explicitly little-endian accessor methods.
Motivation:
ddebc1027d missed to make Errors.throwConnectException(...) public
Modifications:
Make method public
Result:
Be able to use Errors.throwConnectException(...) from other module
Motivation:
Netty 5 will require Java 11 at a minimum, so this pre-Java 9 specific code will never be used.
Modification:
Removed the dead code.
Result:
Less code to maintain.
Motivation:
03aafb9cff did ensure we fail while loading a natibe library which is not compatible. While this is great it is still sometimes hard for people to understand what NoSuchMethodError means in this context.
Modifications:
If possible rethrow the NoSuchMethodError and provide some more hints about multiple versions of the shared library
Result:
Easier to understand for people why loading fails
Motivation:
ddebc10 added a few adjustments that are needed by io_uring that we will add as an incubator repository. Unfortunally we missed the changed in PlatformDependent*.
Modifications:
Add missing methods
Result:
Be able to compile io_uring code against core netty
Motivation:
During the last few month we did develop an io_uring based transport which shows very promising performance numbers. To give it more time to bake we will develop it outside of netty in an "incubator" module which will make it clear to users what to expect and also allow us to seperate its release cycle. While the implementation of it is very self contained there are few small adjustments that need to be made in netty itself to allow us to reuse code.
Modifications:
- AbstractChannel: Add method which can be used when a write fails and remove final from one method
- IovArray: Allow to create an IovArray from a ByteBuf instance
- FileDescriptor: Allow to reuse mark close logic via sub-class
Result:
Be able to reuse netty core classes in io_uring incubator repository
Motivation:
03aafb9cff did ensure we unregister all native methods when we unload / or fail during load of the native library. Unfortunally it missed to unregister in one case for kqueue.
Modifications:
Add unregister calls to the unload function
Result:
Correctly unregister in all cases
Motivation:
Conscrypt 2.5.1 is available and it's a good idea to upgrade to the latest version.
Modification:
Upgraded Conscrypt 2.4.0 to 2.5.1
Result:
Newer Conscrypt version.
Motivation:
FingerprintTrustManagerFactory can only use SHA-1 that is considered
insecure.
Modifications:
- Updated FingerprintTrustManagerFactory to accept a stronger hash algorithm.
- Remove the constructors that still use SHA-1.
- Added a test for FingerprintTrustManagerFactory.
Result:
A user can now configure FingerprintTrustManagerFactory to use a
stronger hash algorithm.
Co-authored-by: Norman Maurer <norman_maurer@apple.com>
Motivation:
It's important to unload all previous registered native methods when there is a failure during loading the native lib. Failing to do so may lead to an "invalid state" and so may segfault the JVM when trying to call a native method that was previous loaded.
This was observed when two versions of netty-tcnative were on the classpath which had different requirements in terms of linking.
Something like this was reported in he hs log:
```
Instructions: (pc=0x0000000116413bf0)
0x0000000116413bd0:
[error occurred during error reporting (printing registers, top of stack, instructions near pc), id 0xb]
Register to memory mapping:
RAX=0x0000000116413bf0 is an unknown value
RBX={method} {0x000000011422e708} 'aprMajorVersion' '()I' in 'io/netty/internal/tcnative/Library'
RCX=0x000000000000000a is an unknown value
RDX=0x000000000000000a is an unknown value
```
Modifications:
- Unregister previous registered native methods on failure
- Unregister previous registered native methods on on unload of the native lib
Result:
No more segfault caused by invalid state when loading of the native lib fails in between. In this case the user will receive an error now like:
Motivation:
SLF4J 1.7.30 is the latest version in 1.7.x and we should upgrade to it from 1.7.21.
Modification:
Changed 1.7.21 to 1.7.30
Result:
Newer version of SLF4J
Motivation:
We should preferable always release the message before we notify the promise. Thhis has a few advantages:
- Release memory as soon as possible
- Listeners observe the "more correct" reference count
Modifications:
Release message before fail the promises
Result:
Faster releasing of resources. This came up in https://github.com/netty/netty/issues/10723
Motivation:
Since GraalVM version 19.3.0, instances of java.net.InetAddress (and its subclasses Inet4Address and Inet6Address) are not allowed in native image heap (that is, they cannot be stored in static fields of classes initialized at build time or be reachable through static fields of such classes). When building a native image, it makes sense to initialize at build time as many classes as possible.
But some fields of some classes in Netty (for example, NetUtil.LOCALHOST4) contain InetAddress instances. If a program is using code path that makes it possible to reach such fields at build time initialization, it becomes impossible to build a native image initializing core Netty classes initialized at runtime. An example of such a program is a client that uses netty-dns.
Modifications:
- Add netty-testsuite-native-image-client Maven module to test that such an example program can be built after the corresponding fixes
- Add native-image.properties to resolver-dns module to move initialization of some classes to runtime (some of them are parsing configuration during initialization, so it makes no sense to initialize them at build time; for others, it's needed to avoid InetAddress reachability at build time)
- Add substitutions for NetUtil.LOCALHOST4, NetUtil.LOCALHOST6 and NetUtil.LOCALHOST to overcome the InetAddress-related prohibition
- Extract some initialization code from NetUtil to NetUtilInitializations to allow it to be used by the substitutions
Result:
A client program using netty-dns with --initialize-at-build-time=io.netty builds successfully
Motivation:
Thread.stop() works by producing a ThreadDeath error in the target thread. EventLoops swallow all Throwables, which makes them effectively unkillable. This is effectively a memory leak, for our application. Beside this we should also just regrow all `Error` as there is almost no way to recover.
Modification:
Edit the EventLoops that swallow Throwables to instead rethrow Error.
Result:
`EventLoop` can crash if `Error` is thrown
Motivation:
At the moment we have only one base `WebSocketHandshakeException` for handling WebSocket upgrade issues.
Unfortunately, this message contains only a string message about the cause of the failure, which is inconvenient in handling.
Modification:
Provide new `WebSocketClientHandshakeException` with `HttpResponse` field and `WebSocketServerHandshakeException` with `HttpRequest` field both of them without content for avoid reference counting
problems.
Result:
More information for more flexible handling.
Fixes#10277#4528#10639.
Motivation:
Http2Headers has JavaDoc error which says Sets the {@link PseudoHeaderName#AUTHORITY} header or {@code null} if there is no such header however it should be Sets the {@link PseudoHeaderName#AUTHORITY} header in Http2Headers#authority(CharSequence) methods because it only sets CharSequence.
This is true for all setters in Http2Headers.
Modification:
Fixed all JavaDoc errors.
Result:
Better JavaDoc.
Motivation:
HTTP is a plaintext protocol which means that someone may be able
to eavesdrop the data. To prevent this, HTTPS should be used whenever
possible. However, maintaining using https:// in all URLs may be
difficult. The nohttp tool can help here. The tool scans all the files
in a repository and reports where http:// is used.
Modifications:
- Added nohttp (via checkstyle) into the build process.
- Suppressed findings for the websites
that don't support HTTPS or that are not reachable
Result:
- Prevent using HTTP in the future.
- Encourage users to use HTTPS when they follow the links they found in
the code.
Motivation:
In some situations we could have end up calling some functions with NULL parameters which in this case could lead to undefined behavior. All of this would have happened during loading of the native lib.
Modifications:
Add NULL check as guards and return early
Result:
Fix some possible undefined behavior
Motivation:
DatagramDnsResponseDecoder should rethrow as CorruptedFrameException if an IndexOutOfBoundsException happens.
Modifications:
- Catch IndexOutOfBoundsException and rethrow as CorruptedFrameException
- Add a testcase
Result:
Less noise in the logs
Motivation:
DuplexChannel allow for half-closure, we should have a special config interface for it as well.
Modifications:
Add DuplexChannelConfig which allows to configure half-closure.
Result:
More consistent types
Motivation:
26f3cd89ef did introduce a profile for compiling on JDK15 but did miss to set the compiler settings correctly for the requirements of this branch
Modifications:
Correct compiler settings.
Result:
Be able to build with JDK15
Motivation:
OpenJDK15 was released, we should compile with it on the CI
Modifications:
Add docker-compose files to be able to compile with OpenJDK15
Result:
Compile with latest major JDK version
Motivation:
I noticed WebSocketServerExtensionHandler taking up a non-trivial
amount of CPU time for a non-websocket based menchmark. This attempts
to speed it up.
Modifications:
- It is faster to check for a 101 response than to look at headers,
so an initial response code check is done
- Move all the actual upgrade code into its own method to increase
chance of this method being inlined
- Add an extra contains() check for the upgrade header, to avoid
allocating an iterator if there is no upgrade header
Result:
A small but noticable performance increase.
Signed-off-by: Stuart Douglas <stuart.w.douglas@gmail.com>
Motivation:
In the master branch we fail fire* operations on the ChannelHandlerContext once the handler was removed. This is by design as it is "unspecified" what the semantics could be after the handler was removed and may lead to very hard to debug problems. Because of this we need to select the right ChannelHandlerContext for firing the event.
Modifications:
Choose a valid ChannelHandlerContext based on the state of the context of the handler
Result:
No more test failures
