Commit Graph

10538 Commits

Author SHA1 Message Date
赵延
1d1087243f
Unify the exception for bind operations in AbstractBootstrap (#11018)
Motivation:

How we used exceptions was not consistent.

Modifications:

Use the same type of exception in the bind methods.

Result:

Fixes #11014
2021-02-15 08:59:10 +01:00
skyguard1
899e5a6850 Upgrade graalvm version to the latest version (#11012)
Motivation:
The current netty's graalvm dependency version is too low, so you need to upgrade the plugin

Modification:
Upgrade Graalvm version to the latest version, please review this pr, thank you

Result:

Use up-to-date version.

Co-authored-by: xingrufei <xingrufei@sogou-inc.com>
2021-02-11 13:30:00 +01:00
Norman Maurer
b43b67553e Disable flaky test (#11017)
Motivation:

The testGlobalWriteThrottle is flaky and failed our build multiple times now. Lets disable it for now until we had time to investigate

Modifications:

Disable flaky test

Result:

Less failures during build
2021-02-11 13:27:38 +01:00
Violeta Georgieva
b1ce20c080 Allow blocking calls when parsing etcResolver/hosts files (#11009)
Motivation:

When etcResolver/hosts files are parsed, FileInputStream.read(...) is internally called by

- UnixResolverDnsServerAddressStreamProvider#parseEtcResolverSearchDomains
- UnixResolverDnsServerAddressStreamProvider#parseEtcResolverOptions
- HostsFileParser#parse

This will cause the error below when BlockHound is enabled

reactor.blockhound.BlockingOperationError: Blocking call! java.io.FileInputStream#readBytes
     	at java.io.FileInputStream.readBytes(FileInputStream.java)
     	at java.io.FileInputStream.read(FileInputStream.java:255)

Modifications:

- Add whitelist entries to BlockHound configuration
- Fix typos in UnixResolverDnsServerAddressStreamProvider
- Add tests

Result:

Fixes #11004
2021-02-11 11:05:14 +01:00
strugcoder
c1b3ffafcf Simplity some code (#11000)
Motivation:

There was some code that could be simplified.

Modification:

Simplify code.

Result:

Code cleanup
2021-02-11 09:06:16 +01:00
Chris Vest
4177e2c445 Revert test debugging flags and update surefire/failsafe (#11016)
* Revert "Add a profile for debugging tests that run from Maven (#11011)"

This reverts commit 83895f0f

The same functionality is already natively available in surefire, by adding the `-Dmaven.surefire.debug` flag to Maven.

* Update surefire/failsafe version

These new versions copes better when our tests prints to STDOUT, and disturbs the progress processing that these plugins do.
2021-02-10 15:37:06 +01:00
Norman Maurer
42a2c9c831 Enable stateless resumption for TLSv1.3 by default when using OpenSSL / BoringSSL (#10997)
Motivation:

At the moment we always set SSL_OP_NO_TICKET when building our context. The problem with this is that this also disables resumption for TLSv1.3 in BoringSSL as it only supports stateless resumption for TLSv1.3 which uses tickets.
We should better clear this option when TLSv1.3 is enabled to be able to resume sessions. This is also inline with the OpenJDK which enables this for TLSv1.3 by default as well.

Modifications:

Check for enabled protocols and if TLSv1.3 is set clear SSL_OP_NO_TICKET.

Result:

Be able to resume sessions for TLSv1.3 when using BoringSSL.
2021-02-08 20:56:42 +01:00
Norman Maurer
9c2de76add Use Files.createTempFile(...) to ensure the file is created with proper permissions
Motivation:

File.createTempFile(String, String)` will create a temporary file in the system temporary directory if the 'java.io.tmpdir'. The permissions on that file utilize the umask. In a majority of cases, this means that the file that java creates has the permissions: `-rw-r--r--`, thus, any other local user on that system can read the contents of that file.
This can be a security concern if any sensitive data is stored in this file.

This was reported by Jonathan Leitschuh <jonathan.leitschuh@gmail.com> as a security problem.

Modifications:

Use Files.createTempFile(...) which will use safe-defaults when running on java 7 and later. If running on java 6 there isnt much we can do, which is fair enough as java 6 shouldnt be considered "safe" anyway.

Result:

Create temporary files with sane permissions by default.
2021-02-08 18:17:31 +01:00
Norman Maurer
4d3bd06212 Update to latest os-maven-plugin (#11003)
Motivation:

A new version of the os-maven-plugin was released

Modifications:

Update to latest version

Result:

Use latest version
2021-02-08 08:43:44 +01:00
Scott Mitchell
4a5d7a5a17 ReadOnlyByteBuf writable bytes
Motivation:
ReadOnlyByteBuf and ReadOnlyByteBuffer are not writable, but their writableBytes
related methods return non-zero values. This is inconsistent with the behavior
of these buffer types.

Modifications:
- ReadOnlyByteBuf and ReadOnlyByteBuffer writableBytes related methods should
  return 0

Result:
More correct ReadOnlyByteBuf and ReadOnlyByteBuffer behavior with respect to
writability.
2021-02-05 20:26:28 +01:00
Francesco Nigro
517da28740 DecodeHexBenchmark is too branch-predictor friendly (#9942)
Motivation:

DecodeHexBenchmark needs to be less branch-predictor friendly
to mimic the "real" behaviour while decoding

Modifications:

DecodeHexBenchmark uses a larger sets of inputs, picking them at
random on each iteration and the benchmarked method is made !inlineable

Result:

DecodeHexBenchmark is more trusty while showing the performance
difference between different decoding methods
2021-02-05 15:28:25 +01:00
Zxy
87392634d2 Fix memory release failure when "maxNumElems == 1" of PoolSubpage (#10988)
Motivation:

when customer need large of 'byteBuf.capacity' in [7168, 8192], the size of 'chunk.subpages' may be inflated when large of byteBuf be released, not consistent with other 'byteBuf.capacity'

Modification:

when maxNumElems == 1 need consider remove from pool

Result:

Fixes #10896. 

Co-authored-by: zxingy <zxingy@servyou.com.cn>
2021-02-05 14:54:44 +01:00
Norman Maurer
d7fb0f5c0b Revert HttpPostMultipartRequestDecoder and HttpPostStandardRequestDecoder to e5951d46fc (#10989)
Motivation:

The changes introduced in 1c230405fd did cause various issues while the fix itself is not considered critical. For now it is considered the best to just rollback and investigate more.

Modifications:

- Revert changes done in 1c230405fd (and later) for
the post decoders.
- Ensure we give memory back to the system as soon as possible in a safe manner

Result:

Fixes https://github.com/netty/netty/issues/10973
2021-02-03 20:41:28 +01:00
Norman Maurer
f25b12077a Clarify who is responsible closing the InputStream once SslContext w… (#10983)
Motivation:

It was not 100% clear who is responsible calling close() on the InputStream.

Modifications:

Clarify javadocs.

Result:

Related to https://github.com/netty/netty/issues/10974

Co-authored-by: Chris Vest <christianvest_hansen@apple.com>
2021-02-01 11:50:55 +01:00
Norman Maurer
980ea9c351 Revert "Enable SSL_MODE_ENABLE_FALSE_START if jdkCompatibilityMode is false (#10407)" (#10980)
Motivation:

TLS_FALSE_START slightly changes the "flow" during handshake which may cause suprises for the end-user. We should better disable it by default again and later add a way to enable it for the user.

Modification:

This reverts commit 514d349e1f.

Result:

Restore "old flow" during TLS handshakes.
2021-01-29 19:56:12 +01:00
Bennett Lynch
5a725edf4a
[master] Allow and skip null handlers when adding a vararg list of handlers (#10776)
Allow and skip null handlers when adding a vararg list of handlers

Motivation

Allowing null handlers allows for more convenient idioms in
conditionally adding handlers, e.g.,

ch.pipeline().addLast(
        new FooHandler(),
        condition ? new BarHandler() : null,
        new BazHandler()
);

Modifications

* Change addFirst(..) and addLast(..) to skip null handlers, rather than
break or short-circuit.
* Add new unit tests.

Result

* Makes addFirst(..) and addLast(..) behavior more consistent
* Resolves https://github.com/netty/netty/issues/10728
2021-01-29 11:30:45 +01:00
Norman Maurer
3e5a08cefb Fix possible SEGV when using native dns resolver on macos (#10971)
Motivation:

We should add some more NULL checks to ensure we not SEGV in some cases

Modifications:

Add more NULL checks

Result:

More robust implementation
2021-01-28 15:15:36 +01:00
Norman Maurer
99fc0e486d Correctly filter out TLSv1.3 ciphers if TLSv1.3 is not enabled (#10919)
Motivation:

We didnt correctly filter out TLSv1.3 ciphers when TLSv1.3 is not enabled.

Modifications:

- Filter out ciphers that are not supported due the selected TLS version
- Add unit test

Result:

Fixes https://github.com/netty/netty/issues/10911

Co-authored-by: Bryce Anderson <banderson@twitter.com>
2021-01-28 11:01:57 +01:00
Norman Maurer
a3d100a7e8 Ignore SocketShutdownOutputBySelfTest.testWriteAfterShutdownOutputNoWritabilityChange (#10970)
Motivation:

The testWriteAfterShutdownOutputNoWritabilityChange() failed a few times on the CI randomly. Let's skip it for now while we investigate and see if there is anything we can do to make the test less flaky on the CI.

Modifications:

Add @Ignore on the testWriteAfterShutdownOutputNoWritabilityChange method

Result:

Less flaky CI
2021-01-28 07:30:36 +01:00
Norman Maurer
fb9412b0ad Update dependency declaration in all pom.xml (#10967)
Motivation:

We did have the architecture hardcoded in the dependency which is not correct as this will let the build fail on Applie Silicion (m1). Also we did miss some dependencies on other BSDs

Modifications:

- Fix classifier
- Add missing dependencies

Result:

Be able to build on Apple Silicon (m1)
2021-01-27 10:25:36 +01:00
Norman Maurer
b10e514615 Ensure we create a copy of the attributes and options when bootstrap a channel (#10965)
Motivation:

We need to ensure we copy the attributes and options when bootstrap the channel as otherwise we may change the underlying Entry.
This is similar to what was reported in https://github.com/netty/netty-incubator-codec-quic/issues/152.

Modifications:

- Do a copy and re-use methods
- Add unit tests

Result:

Don't affect attributes / options of channels that are already bootstrapped
2021-01-26 19:33:25 +01:00
Carl Mastrangelo
c68af5c8f4 Don't use Fixed ports for UDP test (#10961)
Motivation:
If the given port is already bound, the PcapWriteHandlerTest will sometimes fail.

Modification:
Use a dynamic port using `0`, which is more reliable

Result:
Less Flaky
2021-01-26 08:31:22 +01:00
Stephane Landelle
6c041c3104 Merge WebSocket extensions, close #10792 (#10956)
Motivation:

We currently append extensions to the user defined "sec-websocket-extensions" headers. This can cause duplicated entries.

Modifications:

* Replace existing `WebSocketExtensionUtil#appendExtension` private helper with a new `computeMergeExtensionsHeaderValue`. User defined parameters have higher precedence.
* Add tests (existing method wasn't tested)
* Reuse code for both client and server side (code was duplicated).

Result:

No more duplicated entries when user defined extensions overlap with the ones Netty generated.
2021-01-22 08:50:25 +01:00
Duke Bartholomew
8eb8ad8e9d Allow to use int while build MqttMessageIdVariableHeader (#10930)
Motivation:

Exception occurs in the MQTT message builder class (`io.netty.handler.codec.mqtt.MqttMessageBuilders`) when trying to create a message with packetId > 32767

Modification:

-add method that takes int
- deprecate old methods that take short. 

Result:


Fixes #10929 .
2021-01-21 14:41:25 +01:00
Norman Maurer
56d2635733 Override ALPN methods on ReferenceCountedOpenSslEngine (#10954)
Motivation:

We should override the get*ApplicationProtocol() methods in ReferenceCountedOpenSslEngine to make it easier for users to obtain the selected application protocol

Modifications:

Add missing overrides

Result:

Easier for the user to get the selected application protocol (if any)
2021-01-21 14:07:44 +01:00
Norman Maurer
6ae8cd6e44 Mark some methods as protected to make it easier to write own SslContext implementations (#10953)
Motivation:

We should expose some methods as protected to make it easier to write custom SslContext implementations.
This will be reused by the code for https://github.com/netty/netty-incubator-codec-quic/issues/97

Modifications:

- Add protected to some static methods which are useful for sub-classes
- Remove some unused methods
- Move *Wrapper classes to util package and make these public

Result:

Easier to write custom SslContext implementations
2021-01-21 14:07:28 +01:00
Norman Maurer
b19b8c39cb Ignore priority frames for non existing streams and so prevent a NPE (#10943)
Motivation:

https://github.com/netty/netty/pull/10765 added support for push promise and priority frames when using the Http2FrameCodec. Unfortunally it didnt correctly guard against the possibility to receive a priority frame for an non-existing stream, which resulted in a NPE

Modifications:

- Ignore priority frame for non existing stream
- Correctly implement equals / hashcode for DefaultHttp2PriorityFrame
- Add unit tests

Result:

Fixes https://github.com/netty/netty/issues/10941
2021-01-18 14:14:00 +01:00
Norman Maurer
35ac770f3d Correctly handle fragmentation in JdkZlibDecoder (#10948)
Motivation:

We had multiple bugs in JdkZlibDecoder which could lead to decoding errors when the data was received in a fragmentated manner.

Modifications:

- Correctly handle skipping of comments
- Correctly handle footer / header decoding
- Add unit test that verifies the correct handling of fragmentation

Result:

Fixes https://github.com/netty/netty/issues/10875
2021-01-18 14:03:38 +01:00
Norman Maurer
2aaa468a22 Make native loading logging less confusing (#10944)
Motivation:

We produced a lot of noise during loading native libraries as we always included the stacktrace if we could not load by one mechanism. We should better just not include the stacktrace in the debugging logging if one mechanism fails. We will log all the stacks anyway when all of the mechanisms fail.

Modifications:

Make logging less aggressive

Result:

Less confusing behaviour for the end-user
2021-01-16 10:15:12 +01:00
Norman Maurer
f6c1c0ea9c Use GracefulShutdown when stream space is exhausted (#10946)
Motivation:

We should use GracefulShutdown when we try to create a stream and fail it because the stream space is exhausted as we may still want to process the active streams.

Modifications:

- Use graceful shutdown
- Add unit test

Result:

More graceful handling of stream creation failure due stream space exhaustation
2021-01-16 09:55:53 +01:00
Francesco Nigro
5337d3eeb4 Implement SWAR indexOf byte search (#10737)
Motivation:

Faster indexOf

Modification:

Create generic SWAR indexOf that any ByteBuf implementation can use

Result:

Fixes #10731
2021-01-15 15:09:50 +01:00
Chris Vest
aed20979e6 Update the javadocs on FastThreadLocal (#10942)
Motivation: The writing was unclear.
Modification: Clarified the documentation.
Result: No more ambiguity about what FTL.remove() does.

Fixes #10914
2021-01-15 12:05:09 +01:00
Norman Maurer
ede5eecf35 Fix compile error introduced by dd89d1b6bf 2021-01-14 18:56:32 +01:00
Norman Maurer
b21a08ea03 Fix compile error introduced by bad cherry-pick in a7e8a33833 2021-01-14 18:44:12 +01:00
Violeta Georgieva
dd89d1b6bf Allow blocking calls in UnixResolverDnsServerAddressStreamProvider#parse (#10935)
Motivation:

Internally UnixResolverDnsServerAddressStreamProvider#parse calls FileInputStream.read(...)
when parsing the etcResolverFiles.
This will cause the error below when BlockHound is enabled
reactor.blockhound.BlockingOperationError: Blocking call! java.io.FileInputStream#readBytes
     	at java.io.FileInputStream.readBytes(FileInputStream.java)
     	at java.io.FileInputStream.read(FileInputStream.java:255)

Modifications:

- Add whitelist entry to BlockHound configuration
- Add test

Result:

Fixes #10925
2021-01-14 18:33:26 +01:00
Norman Maurer
a7e8a33833 Ensure native methods for unix-native-common are only registered once. (#10932)
Motiviation:

We need to ensure we only register the methods for unix-native-common once as otherwise it may have strange side-effects.

Modifications:

- Add extra method that should be called to signal that we need to register the methods. The registration will only happen once.
- Adjust code to make use of it.

Result:

No more problems due incorrect registration of these methods.
2021-01-14 17:53:40 +01:00
Norman Maurer
78646b3d7e Verify we can load native modules and add job that verifies on aarch64 as well (#10933)
Motivation:

As shown in the past we need to verify we actually can load the native as otherwise we may introduce regressions.

Modifications:

- Add new maven module which tests loading of native modules
- Add job that will also test loading on aarch64

Result:

Less likely to introduce regressions related to loading native code in the future
2021-01-14 17:15:29 +01:00
Norman Maurer
dc632e378f We need to ensure we always drain the error stack when a callback throws (#10920)
Motivation:

We need to ensure we always drain the error stack when a callback throws as otherwise we may pick up the error on a different SSL instance which uses the same thread.

Modifications:

- Correctly drain the error stack if native method throws
- Add a unit test which failed before the change

Result:

Always drain the error stack
2021-01-11 20:57:16 +01:00
Aki
e8f3e88526 Fix url in README.md (#10915)
Motivation:

We had a typo in the markdown

Modification:

Fix typo

Result:

Corect markdown
2021-01-11 07:50:43 +01:00
Norman Maurer
2aa33165cf Update README
Motivation:

We can add some status badge and also should clarify requirements.

Modifictations:

- Add status badge
- Clarify requirements

Result:

Cleanup docs
2021-01-11 07:50:35 +01:00
Aayush Atharva
c1095a0ac2 Update BouncyCastle Libraries (#10906)
Motivation:
New versions of `Bouncy Castle` libraries are out and we should upgrade to them.

Modification:
Upgraded all `Bouncy Castle` libraries to the latest version.

Result:
The latest versions of `Bouncy Castle` libraries.

Fixes #10905.
2021-01-01 19:33:03 +01:00
YoungTae Seok
ebcd4df212 Ensure Checkstyle suppression for dependency-reduced-pom.xml on Windows (#10899)
Motivation:

`mvn package` on Windows fails if there are some `dependency-reduced-pom.xml` files generated by the previous build.
`mvn clean package` does not help because it does not remove those files at the clean phase.

Modifications:

Use the correct file pattern for the suppression filters.

Result:

Following `mvn package` runs well on Windows.
2021-01-01 19:31:01 +01:00
Aayush Atharva
2139ff9fe3 Add PushPromise and Priority Frame support in Http2FrameCodec (#10765)
Motivation:
Right now, we don't have to handle Push Promise Read in `Http2FrameCodec`. Push Promise is one of the key features of HTTP/2 and we should support it in our `Http2FrameCodec`.

Modification:
Added `Http2PushPromiseFrame` and `Http2PushPromiseFrame` to handle Push Promise and Promise Frame.

Result:
Fixes #10748
2020-12-27 14:38:41 +01:00
Eric Anderson
b4dcd18427 Avoid unsynchronized access to scheduledTaskQueue in GlobalEventExecutor (#10890)
Motivation:

A race detector discovered a data race in GlobalEventExecutor present in
netty 4.1.51.Final:

```
  Write of size 4 at 0x0000cea08774 by thread T103:
    #0 io.netty.util.internal.DefaultPriorityQueue.poll()Lio/netty/util/internal/PriorityQueueNode; DefaultPriorityQueue.java:113
    #1 io.netty.util.internal.DefaultPriorityQueue.poll()Ljava/lang/Object; DefaultPriorityQueue.java:31
    #2 java.util.AbstractQueue.remove()Ljava/lang/Object; AbstractQueue.java:113
    #3 io.netty.util.concurrent.AbstractScheduledEventExecutor.pollScheduledTask(J)Ljava/lang/Runnable; AbstractScheduledEventExecutor.java:133
    #4 io.netty.util.concurrent.GlobalEventExecutor.fetchFromScheduledTaskQueue()V GlobalEventExecutor.java:119
    #5 io.netty.util.concurrent.GlobalEventExecutor.takeTask()Ljava/lang/Runnable; GlobalEventExecutor.java:106
    #6 io.netty.util.concurrent.GlobalEventExecutor$TaskRunner.run()V GlobalEventExecutor.java:240
    #7 io.netty.util.internal.ThreadExecutorMap$2.run()V ThreadExecutorMap.java:74
    #8 io.netty.util.concurrent.FastThreadLocalRunnable.run()V FastThreadLocalRunnable.java:30
    #9 java.lang.Thread.run()V Thread.java:835
    #10 (Generated Stub) <null>

  Previous read of size 4 at 0x0000cea08774 by thread T110:
    #0 io.netty.util.internal.DefaultPriorityQueue.size()I DefaultPriorityQueue.java:46
    #1 io.netty.util.concurrent.GlobalEventExecutor$TaskRunner.run()V GlobalEventExecutor.java:263
    #2 io.netty.util.internal.ThreadExecutorMap$2.run()V ThreadExecutorMap.java:74
    #3 io.netty.util.concurrent.FastThreadLocalRunnable.run()V FastThreadLocalRunnable.java:30
    #4 java.lang.Thread.run()V Thread.java:835
    #5 (Generated Stub) <null>
```

The race is legit, but benign. To trigger it requires a TaskRunner to
begin exiting and set 'started' to false, more work to be scheduled
which starts a new TaskRunner, that work then needs to schedule
additional work which modifies 'scheduledTaskQueue', and then the
original TaskRunner checks 'scheduledTaskQueue'. But there is no danger
to this race as it can only produce a false negative in the condition
which causes the code to CAS 'started' which is thread-safe.

Modifications:

Delete problematic references to scheduledTaskQueue. The only way
scheduledTaskQueue could be modified since the last check is if another
TaskRunner is running, in which case the current TaskRunner doesn't
care.

Result:

Data-race free code, and a bit less code to boot.
2020-12-24 11:46:18 +01:00
Andrea Selva
689929ff8b Add ConnAck message builder method to handle the creation of related properties. (#10812)
Motivation:
The CONNACK message builder `ConnAckBuilder` doesn't provide a smooth way to assign the message properties. This PR try to provide an simpler way to create them, in a lazy way.

Modification:
This PR permit to store properties in the ConnAck message, collecting them and inserting during the build phase. The syntax this PR introduces is:
```java
 MqttMessageBuilders.connAck().properties(new MqttMessageBuilders.PropertiesInitializer<MqttMessageBuilders.ConnAckPropertiesBuilder>() {
        @Override
        public void apply(MqttMessageBuilders.ConnAckPropertiesBuilder builder) {
            builder.assignedClientId("client1234");
            builder.userProperty("custom_property", "value");
         }
 }).build()
```
The name of the properties are defined in the `ConnAckPropertiesBuilder` so that is can be easily used by autocompletion tools.

Result:
This PR adds the builder class `ConnAckPropertiesBuilder`which is used by newly introduced method `properties` inside the message builder class `ConnAckBuilder`.
2020-12-23 10:51:02 +01:00
Norman Maurer
fdf09ee243 Add fallback for android when trying to access the filedescriptor via JNI
Motivation:

Android seems to use a different field name so we should also try to access it with the name used by android.

Modifications:

Try first fd and if this fails try descriptor as field name

Result:

Workaround for android.
2020-12-22 20:43:08 +01:00
Aayush Atharva
ab340e1de0 Change switch to if (#10880)
Motivation:
switch is used when we have a good amount of cases because switch is faster than if-else. However, we're using only 1 case in switch which can affect performance.

Modification:
Changed switch to if.

Result:
Good code.
2020-12-22 19:25:52 +01:00
Oleksii Kachaiev
85ec20ecbd Improve performance of HPACK static table lookup (#10840)
Motivation:

HPACK static table is organized in a way that fields with the same
name are sequential. Which means when doing sequential scan we can
short-circuit scan on name mismatch.

Modifications:

* `HpackStaticTable.getIndexIndensitive` returns -1 on name mismatch
rather than keep scanning.
* `HpackStaticTable` statically defined max position in the array
where name duplication is possible (after the given index there's
no need to check for other fields with the same name)
* Benchmark for different lookup patterns

Result:

Better HPACK static table lookup performance.

Co-authored-by: Norman Maurer <norman_maurer@apple.com>
2020-12-21 15:34:31 +01:00
Norman Maurer
c4a07aee40 Use netty-jni-util via maven central (#10877)
Motivation:

netty-jni-util is now also hosted on maven central. Let's use it

Modifications:

Adjust plugins to just unpack netty-jni-util and use it

Result:

Be able to use what is in the maven cache for netty-jni-util
2020-12-19 10:38:39 +01:00
Paul Lysak
6a057338ee MQTT: foolproof SUBSCRIBE QoS encoding (#10874)
Motivation:

If the MQTT client specifies Subscribe Options parameters only available in MQTT v5 and tries to encode the message as MQTT v3 then an invalid QoS value is encoded

Modification:

Check MQTT version when encoding SUBSCRIBE message options, if it's 3.1 or 3.1.1 - only encode QoS, skip other options.

Result:

MqttEncoder produces a valid SUBSCRIBE message even if the client has specified options not available in the current MQTT version.
2020-12-18 16:16:12 +01:00