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:
I was collecting stats for failed promises with a FixedChannelPool and I was bucketing by stats using cause.getSimpleName(). After #9152 was released, the introduction of the anonymous classes make getSimpleName() return "" causing confusion.
Modification:
Use named classes in the ChannelPool implementations. I made them private, but I can change that if you think otherwise.
Result:
The SimpleChannelPool fails the promises with a ChannelPoolFullException. The FixedChannelPool fails the promises with an AcquireTimeoutException. Also AcquireTimeoutException is more specific than just a plain TimeoutException, which is also useful for troubleshooting. If you want different class names, please advise.
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:
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:
junit deprecated Assert.assertThat(...)
Modifications:
Use MatcherAssert.assertThat(...) as replacement for deprecated method
Result:
Less deprecation warnings
Motivation:
Github now allows to run CodeQL during pull request verification. This allows to detect errors / security problems early.
Modification:
Add config
Result:
Fixes https://github.com/netty/netty/issues/10669
Co-authored-by: Artem Smotrakov <artem.smotrakov@sap.com>
Motivation:
We need to ensure we not leak in tests. We did see some leaks reported related to HaProxyMessageEncoderTest on our CI.
Modifications:
- Use readSlice(...) and so not create new ByteBuf instances that need to be released
Result:
No more leaks
Motivation:
We should use the latest patch releases when building via docker
Modifications:
Update all java versions to the latest patch release
Result:
Use latest releases
Motivation:
We can filter out `null` rules while initializing the instance of `RuleBasedIpFilter` so we don't have to keep checking for `null` rules while iterating through `rules` array in `for loop` which is just a waste of CPU cycles.
Modification:
Added `null` rule check inside the constructor.
Result:
No more wasting CPU cycles on check the `null` rule each time in `for loop` and makes the overall operation more faster.
Motivation:
LGTM reports multiple issues. They need to be triaged,
and real ones should be fixed.
Modifications:
- Fixed multiple issues reported by LGTM, such as redundant conditions,
resource leaks, typos, possible integer overflows.
- Suppressed false-positives.
- Added a few testcases.
Result:
Fixed several possible issues, get rid of false alarms in the LGTM report.
Motivation:
We need to also add -XX:+AllowRedefinitionToAddDeleteMethods for JDK15 and 16 as otherwise blockhound will not work
Modifications:
Add profiles for JDK15 and JDK16
Result:
Blockhound tests pass again
Motivation:
We had two unit tests that sometimes failed due timeouts. After insepecting these I noticed these can be improved to run faster while still do the right validation
Modifications:
- Only submit one task for execution per execute
- Cleanup
Result:
No test failures due timeout
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:
As the PooledByteBufAllocator is a critical part of netty we should ensure it works as expected.
Modifications:
- Add a few more asserts to ensure we not see any corrupted state
- Null out slot in the subpage array once the subpage was freed and removed from the pool
- Merge methods into constructor as it was only called from the constructor anyway.
Result:
Code cleanup
Motivation:
Users may want to do special actions when onComplete(...) was called and depend on these once they receive the SniCompletionEvent
Modifications:
Switch order and so call onLookupComplete(...) before we fire the event
Result:
Fixes https://github.com/netty/netty/issues/10655
Motivation:
We have a few classes in which we store and reuse static instances of various exceptions. When doing so it is important to also override fillInStacktrace() and so prevent the leak of the ClassLoader in the internal backtrace field.
Modifications:
- Add overrides of fillInStracktrace when needed
- Move ThrowableUtil usage in the static methods
Result:
Fixes https://github.com/netty/netty/pull/10686
Motivation:
The process of reporting security issues should be documented
and easy to find.
Modification:
Added a SECURITY.md file that describes how to report a security issue.
Result:
It's a bit easier to find the docs that describe how security issues
should be reported. Also, when someone creates an issue the repository,
they will see a link to the security policy.
Motivation:
Fix Broken Link of OWASP HttpOnly Cookie in Cookie class.
Modification:
Updated the broken link.
Result:
Broken Link Fix for better Documentation.
Motivation:
We should use ObjectUtil for checking if Compression parameters are in range. This will reduce LOC and make code more readable.
Modification:
Used ObjectUtil
Result:
More readable code
Motivation:
All scheduled executors should behave in accordance to their API.
The bug here is that scheduled tasks were not run more than once because we executed the runnables directly, instead of through the provided runnable future.
Modification:
We now run tasks through the provided future, so that when each run completes, the internal state of the task is reset and the ScheduledThreadPoolExecutor is informed of the completion.
This allows the executor to prepare the next run.
Result:
The UnorderedThreadPoolEventExecutor is now able to run scheduled tasks more than once.
Which is what one would expect from the API.
Motivation:
Java 16 will come around eventually anyway, and this makes it easier for people to experiment with Early Access builds.
Modification:
Added Maven profiles for JDK 16 to relevant pom files.
Result:
Netty now builds on JDK 16 pre-releases (provided they've not broken compatibility in some way).
Motivation:
We check lots of numbers if it lies in a range. So it's better to add a method in `ObjectUtil` to check if a number lies inside a range.
Modification:
Added Range check method.
Result:
A faster and better way to check if a number lies inside a range.
Motivation:
We should simplify and remove useless bit operations to make code more efficient, faster, and easier to understand.
Modification:
Simplified and Removed Useless Bit Operations
Result:
Simpler Code.
Motivation:
Avoid implicit conversions to narrower types in
AbstractMemoryHttpData and Bzip2HuffmanStageEncoder classes
reported by LGTM.
Modifications:
Updated the classes to avoid implicit casting to narrower types.
It doesn't look like that an integer overflow is possible there,
therefore no checks for overflows were added.
Result:
No warnings about implicit conversions to narrower types.
Motivation:
LGTM reported that WebSocketUtil uses MD5 and SHA-1
that are considered weak. Although those algorithms
are insecure, they are required by draft-ietf-hybi-thewebsocketprotocol-00
specification that is implemented in the corresponding WebSocket
handshakers. Once the handshakers are removed, WebSocketUtil can be
updated to stop using those weak hash functions.
Modifications:
Added SuppressWarnings annotations.
Result:
Suppressed warnings.
Motivation:
- To make ensureWritable throw IOOBE when maxCapacity is exceeded, even if
the requested new capacity would overflow Integer.MAX_VALUE
Modification:
- AbstractByteBuf.ensureWritable0 is modified to detect when
targetCapacity has wrapped around
- Test added for correct behaviour in AbstractByteBufTest
Result:
- Calls to ensureWritable will always throw IOOBE when maxCapacity is
exceeded (and bounds checking is enabled)
Motivation:
`Http2MultiplexHandler` have to 2 empty lines at the end instead of 1.
Modification:
Removed 1 extra line.
Result:
Little better code style.
Add validation check about websocket path
Motivation:
I add websocket handler in custom server with netty.
I first add WebSocketServerProtocolHandler in my channel pipeline.
It does work! but I found that it can pass "/websocketabc". (websocketPath is "/websocket")
Modification:
`isWebSocketPath()` method of `WebSocketServerProtocolHandshakeHandler` now checks that "startsWith" applies to the first URL path component, rather than the URL as a string.
Result:
Requests to "/websocketabc" are no longer passed to handlers for requests that starts-with "/websocket".
Motivation:
We should implement the Closeable method to properly close `OutputStream` and `PcapWriteHandler`. So whenever `handlerRemoved(ChannelHandlerContext)` is called or the user wants to stop the Pcap writes into `OutputStream`, we have a proper method to close it otherwise writing data to close `OutputStream` will result in `IOException`.
Modification:
Implemented `Closeable` in `PcapWriteHandler` which calls `PcapWriter#close` and closes `OutputStream` and stops Pcap writes.
Result:
Better handling of Pcap writes.
Motivation:
We can use ObjectUtil#checkPositive instead of manually checking maxContentLength. Also, there was a missing JavaDoc for Http2Exception,
Modification:
Used ObjectUtil#checkPositive for checking maxContentLength.
Added missing JavaDoc.
Result:
More readable code.
Motivation:
DefaultAttributeMap::attr has a blocking behaviour on lookup of an existing attribute:
it can be made non-blocking.
Modification:
Replace the existing fixed bucket table using a locked intrusive linked list
with an hand-rolled copy-on-write ordered single array
Result:
Non blocking behaviour for the lookup happy path
Motivation:
We need to take the Provider into account as well when trying to detect if TLSv1.3 is used by default / supported
Modifications:
- Change utility method to respect provider as well
- Change testcode
Result:
Less error-prone tests
Motivation:
Some JDKs dissallow the usage of keysizes < 2048, so we should not use such small keysizes in tests.
This showed up on fedora 32:
```
Caused by: java.security.cert.CertPathValidatorException: Algorithm constraints check failed on keysize limits. RSA 1024bit key used with certificate: CN=tlsclient. Usage was tls client
at sun.security.util.DisabledAlgorithmConstraints$KeySizeConstraint.permits(DisabledAlgorithmConstraints.java:817)
at sun.security.util.DisabledAlgorithmConstraints$Constraints.permits(DisabledAlgorithmConstraints.java:419)
at sun.security.util.DisabledAlgorithmConstraints.permits(DisabledAlgorithmConstraints.java:167)
at sun.security.provider.certpath.AlgorithmChecker.check(AlgorithmChecker.java:326)
at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:125)
... 23 more
```
Modifications:
Replace hardcoded keys / certs with SelfSignedCertificate
Result:
No test-failures related to small key sizes anymore.
Motivation:
We should stop as soon as we were able to set the key material on the server side as otherwise we may select keymaterial that "belongs" to a less prefered cipher. Beside this it also is just useless work.
We also need to propagate the exception when it happens during key material selection on the client side so openssl will produce the right alert.
Modifications:
- Stop once we were able to select a key material on the server side
- Ensure we not call choose*Alias more often then needed
- Propagate exceptions during selection of the keymaterial on the client side.
Result:
Less overhead and more correct behaviour
Motivation:
We need to let openssl know that we failed to find the key material so it will produce an alert for the remote peer to consume. Beside this we also need to ensure we wrap(...) until we produced everything as otherwise the remote peer may see partial data when an alert is produced in multiple steps.
Modifications:
- Correctly throw if we could not find the keymaterial
- wrap until we produced everything
- Add test
Result:
Correctly handle the case when key material could not be found
Motivation:
Calling chooseServerAlias(...) may be expensive so we should ensure we not call it multiple times for the same auth methods.
Modifications:
Remove duplicated from authMethods before trying to call chooseServerAlias(...)
Result:
Less performance overhead during key material selection
Motivation:
Following Javadoc standard
Modification:
Change from `@param KeyManager` to `@param keyManager`
Result:
The `@param` matches the actual parameter variable name
Motivation:
We should use an initial buffer size with is >= 1500 (which is a common setting for MTU) to reduce the need for memory copies when a new connection is established. This is especially interesting when SSL / TLS comes into the mix.
This was ported from swiftnio:
https://github.com/apple/swift-nio/pull/1641
Modifications:
Increase the initial size from 1024 to 2048.
Result:
Possible less memory copies on new connections
Motivation:
Reason code for MQTT SUBACK messages is truncated, thus not allowing to get new codes supported by MQTT v.5
Modification:
Changed `MqttCodecTest.testUnsubAckMessageForMqtt5` to catch it then, removed truncation in `MqttDecoder.decodeSubackPayload` to make it pass.
Result:
Codec users can get all reason codes supported by MQTT5 now.
Motivation:
Creating exceptions is expensive so we should only do so if really needed.
Modifications:
Only create the ConnectTimeoutException if we really need it.
Result:
Less overhead
