Motivation:
We should minimize and optimize bound checks as much as possible to get the most out of performance.
Modifications:
- Use bitwise operations to remove branching
- Remove branches when possible
Result:
Better performance for various operations.
Motivation:
The proxy example contains some code that is not needed. This can confuse the reader.
Modifications:
Remove the not needed ctx.write(...).
Result:
Less confusing code.
Motivation:
ByteBufUtil.writeUtf8(...) / writeUsAscii(...) can use a fast-path when writing into AbstractByteBuf. We should try to unwrap WrappedByteBuf implementations so
we are able to do the same on wrapped AbstractByteBuf instances.
Modifications:
- Try to unwrap WrappedByteBuf to use the fast-path
Result:
Faster writing of utf8 and usascii for WrappedByteBuf instances.
Motivation:
As toString() is often used while logging we need to ensure this produces no exception.
Modifications:
Ensure we never throw an IllegalReferenceCountException.
Result:
Be able to log without produce exceptions.
Motivation:
PendingWriteQueueTest needs some cleanup.
Modifications:
- Cleanup code to remove deprecation warnings
- use static imports
Result:
No more warnings
Motivation:
At the moment we only forward decoded messages that were added the out List once the full decode loop was completed. This has the affect that resources may not be released as fast as possible and as an application may incounter higher latency if the user triggeres a writeAndFlush(...) as a result of the decoded messages.
Modifications:
- forward decoded messages after each decode call
Result:
Forwarding decoded messages through the pipeline in a more eager fashion.
Motivation:
Often unwrap(...), wrap(...) is used with a single ByteBuffer and not with a ByteBuffer[]. We should reduce the array creations in this case.
Modifications:
Reuse ByteBuffer[1] for dst/src ByteBuffer.
Result:
Less object creation and so less GC
Motivation:
We missed to run all pending tasks when EmbeddedChannel.close(...) or disconnect(...) was called. Because of this channelInactive(...) / channelUnregistered(...) of the handlers were never called.
Modifications:
Correctly run all pending tasks and cancel all not ready scheduled tasks when close or disconnect was called.
Result:
Correctly run tasks on close / disconnect and have channelInactive(...) / channelUnregistered(...) called.
Motivation:
If a RDHUP and IN event occurred at the same time it is possible we may not read all pending data on the channel. We should ensure we read data before processing the RDHUP event.
Modifications:
- Process the RDHUP event before the IN event.
Result:
Data will not be dropped.
Fixes https://github.com/netty/netty/issues/4317
Motivation:
EPOLL attempts to support half closed socket, but fails to call shutdown to close the read portion of the file descriptor.
Motivation:
- If half closed is supported shutting down the input should call underlying Native.shutdown(...) to make sure the peer is notified of the half closed state.
Result:
EPOLL half closed is more correct.
Motivation:
As a SSL session may be created later at some time we should compute the creation time in a lazy fashion.
Modifications:
- Lazy compute creation time
- Add some unit test
Result:
More correct behavior
Motivation:
JDK SslEngine supports renegotion, so we should at least support it server-side with OpenSslEngine as well.
That said OpenSsl does not support sending messages asynchronly while the renegotiation is still in progress, so the application need to ensure there are not writes going on while the renegotiation takes place. See also https://rt.openssl.org/Ticket/Display.html?id=1019 .
Modifications:
- Add support for renegotiation when OpenSslEngine is used in server mode
- Add unit tests.
- Upgrade to netty-tcnative 1.1.33.Fork9
Result:
Better compatibility with the JDK SSLEngine implementation.
Motivation:
We missed to correctly update the internal handshake state on beginHandshake() if we was able to finish the handshake directly. Also we not handled the case correctly when beginHandshake() was called after the first handshake was finished, which incorrectly throw an Error.
Modifications:
- Correctly set internal handshake state in all cases
- Correctly handle beginHandshake() once first handshake was finished.
Result:
Correctly handle OpenSslEngine.beginHandshake()
Motivation:
We should fail the build on warnings in the JNI/c code.
Modifications:
- Add GCC flag to fail build on warnings.
- Fix warnings (which also fixed a bug when using splice with offsets).
Result:
Better code quality.
Motivation:
A new version of netty-tcnative was released with some important bug-fixes.
Modifications:
Bump up version.
Result:
Using latest netty-tcnative version
Motivation:
We should prevent to add/set DefaultHttpHeaders to itself to prevent unexpected side-effects.
Modifications:
Throw IllegalArgumentException if user tries to pass the same instance to set/add.
Result:
No surprising side-effects.
Motivation:
If a remote peer writes fast enough it may take a long time to have fireChannelReadComplete(...) triggered. Because of this we need to take special care and ensure we try to discard some bytes if channelRead(...) is called to often in ByteToMessageDecoder.
Modifications:
- Add ByteToMessageDecoder.setDiscardAfterReads(...) which allows to set the number of reads after which we try to discard the read bytes
- Use default value of 16 for max reads.
Result:
No risk of OOME.
Motivation:
We should provide a better way to set session keys that not use the deprecated method of netty-tcnative.
Modifications:
- Add OpenSslSessionTicketKey
- Expose new method on OpenSslServerContext and deprecate the old method.
Result:
Easier to use and can remove the deprecated method later on.
Motivation:
We should call shutdown(...) on the socket before closing the filedescriptor to ensure it is closed gracefully.
Modifications:
Call shutdown(...) before close.
Result:
Sockets are gracefully shutdown when using native transport.
Motivation:
We need to ensure all markers are reset when doing an allocation via the PooledByteBufAllocator. This was not the always the case.
Modifications:
Move all logic that needs to get executed when reuse a PooledByteBuf into one place and call it.
Result:
Correct behavior
Motivation:
PR https://github.com/netty/netty/pull/4257 introduced paramters and didn't use them.
Modifications:
- Use the new paramters
Result:
No warnings and correct behavior
Motivation:
OpenSslEngine.unwrap(...) / wrap(...) must return HandhsakeStatus.FINISHED if an unwrap or wrap finishes a handshake to behave like descripted in the SSLEngine docs.
Modifications:
- Ensure we return HandshakeStatus.FINISHED
Result:
Behave correctly.
Motivation:
On ubuntu, InetAddress.getLocalHost() will return 127.0.1.1 this causes some tests to fail.
NetUtil.LOCALHOST4 is more portable.
Modifications:
Made changes in EpollSocketTcpMd5Test to make test passing on ubuntu.
Result:
EpollSocketTcpMd5Test now also passes on ubuntu.
Motivation:
Users may want to control the valid dates for SelfSignedCertificate.
Modifications:
- Allow NOT_BEFORE and NOT_AFTER to be controlled via java system properties.
Result:
Fixes https://github.com/netty/netty/issues/3978
Motivation:
The last os-maven-plugin had a bug that sometimes missed to correctly detect fedora based linux.
Modifications:
Upgrade to 1.4.1
Result:
Correctly detect on all fedora based linux.
Motivation:
RC4 is not supported by default in more recent java versions as RC4 is considered insecure. We should not use it in tests as these test will fail on more recent java version.
Modifications:
Use SSL_RSA_WITH_3DES_EDE_CBC_SHA for test.
Result:
Non failing test on more recent java versions.
Motivation:
To simplify the use of client auth, we need to add it to the SslContextBuilder.
Modifications:
Added a ClientAuth enum and plumbed it through the builder, down into the contexts/engines.
Result:
Client auth can be configured when building an SslContext.
Motivation:
The latest netty-tcnative fixes a bug in determining the version of the runtime openssl lib. It also publishes an artificact with the classifier linux-<arch>-fedora for fedora-based systems.
Modifications:
Modified the build files to use the "-fedora" classifier when appropriate for tcnative. Care is taken, however, to not change the classifier for the native epoll transport.
Result:
Netty is updated the the new shiny netty-tcnative.
Motivation:
According to the SPDY spec https://www.chromium.org/spdy/spdy-protocol/spdy-protocol-draft3-1#TOC-3.2.1-Request header names must be lowercase. Our predefined SPDY extension headers are not lowercase.
Modifications
- SpdyHttpHeaders should define header names in lower case
Result:
Compliant with SPDY spec, and header validation code does not detect errors for our own header names.
Motiviation:
We need to ensure the actual close to the transport takes place before the promsie of the write is notified that triggered it. This is needed as otherwise Channel.isActive(), isOpen() and isWritable() may return true even if the Channel should be closed already.
Modifications:
- Ensure the close takes place first
Result:
ChannelFutureListener will see the correct state of the Channel.
Motivation:
writeBytes(...) missed to set EPOLLOUT flag when not all bytes were written. This could lead to have the EpollEventLoop not try to flush the remaining bytes once the socket becomes writable again.
Modifications:
- Move setting EPOLLOUT flag logic to one point so we are sure we always do it.
- Move OP_WRITE flag logic to one point as well.
Result:
Correctly try to write pending data if socket becomes writable again.
Motivation:
SSLSession.getLocalCertificates() and getLocalPrincipal() was not supported when using OpenSSL, which can produce problems when switch from JDK to OpenSSL impl.
Modifications:
Implement SSLSession.getLocalCertificates() and getLocalPrincipal() for OpenSslEngine.
Result:
More consistent behaving between JDK and OpenSSL based SSLEngine.
Motivation:
As stated in the SSLSession javadocs getPeer* methods need to throw a SSLPeerUnverifiedException if peers identity has not be verified.
Modifications:
- Correctly throw SSLPeerUnverifiedException
- Add test for it.
Result:
Correctly behave like descripted in javadocs.
Motivation:
As we stored the WebSocketServerHandshaker in the ChannelHandlerContext it was always null and so no close frame was send if WebSocketServerProtocolHandler was used.
Modifications:
Store WebSocketServerHAndshaker in the Channel attributes and so make it visibile between different handlers.
Result:
Correctly send close frame.
Motivation:
TCP Fast Open allows data to be carried in the SYN and SYN-ACK packets and consumed by the receiving end during the initial connection handshake, and saves up to one full round-trip time (RTT) compared to the standard TCP, which requires a three-way handshake (3WHS) to complete before data can be exchanged. This commit enables support for TFO on server sockets.
Modifications:
Added new Integer Option TCP_FASTOPEN in EpollChannelOption.
Added getters/setters in EpollServerChannelConfig for TCP_FASTOPEN.
Added way to check if TCP_FASTOPEN is supported on server in Native.
Added setting on socket opt TCP_FASTOPEN if value is set on channel options in doBind in EpollServerSocketChannel.
Enhanced EpollSocketTestPermutation to contain a permutation for server socket containing fast open.
Result:
Users of native-epoll can set TCP_FASTOPEN on server sockets and thus leverage fast connect features of RFC7413 if client is capable of it.
Motivation:
Invoking the javax.net.ssl.SSLEngine.closeInbound() method will send a
fatal alert and invalidate the SSL session if a close_notify alert has
not been received.
From the javadoc:
If the application initiated the closing process by calling
closeOutbound(), under some circumstances it is not required that the
initiator wait for the peer's corresponding close message. (See section
7.2.1 of the TLS specification (RFC 2246) for more information on
waiting for closure alerts.) In such cases, this method need not be
called.
Always invoking the closeInbound() method without regard to whether or
not the closeOutbound() method has been invoked could lead to
invalidating perfectly valid SSL sessions.
Modifications:
Added an instance variable to track whether the
SSLEngine.closeOutbound() method has been invoked. When the instance
variable is true, the SSLEngine.closeInbound() method doesn't need to be
invoked.
Result:
SSL sessions will not be invalidated if the outbound side has been
closed but a close_notify alert hasn't been received.
Motivation:
There are protocols (BGP, SXP), which are typically deployed with TCP
MD5 authentication to protect sessions from being hijacked/torn down by
third parties. This facility is not available on most operating systems,
but is typically present on Linux.
Modifications:
- add a new EpollChannelOption, which is write-only
- teach Epoll(Server)SocketChannel to track which addresses have keys
associated
- teach Native how to set the MD5 signature keys for a socket
Result:
Users of the native-epoll transport can set MD5 signature keys and thus
leverage RFC-2385 protection on TCP connections.
Motivation:
If LocalChannel doWrite executes while the peer's state changes from CONNECTED to CLOSED it is possible that some promise's won't be completed and buffers will be leaked.
Modifications:
- Check the peer's state in doWrite to avoid a race condition
Result:
All write operations should release, and the associated promise should be completed.
Motivation:
The configurable property value recently added was not logged like others properties.
Modifications:
Added debug log with effective value applied.
Result:
Consistent with other properties
Motivation:
See #4174.
Modifications:
Modify transport-native-epoll to allow setting TCP_USER_TIMEOUT.
Result:
Hanging connections that are written into will get timeouted.
Motivation:
Leak detector, when it detects a leak, will print the last 5 stack
traces that touched the ByteBuf. In some cases that might not be enough
to identify the root cause of the leak.
Also, sometimes users might not be interested in tracing all the
operations on the buffer, but just the ones that are affecting the
reference count.
Modifications:
Added command line properties to override default values:
* Allow to configure max number of stack traces to collect
* Allow to only record retain/release operation on buffers
Result:
Users can increase the number of stack traces to debug buffer leaks
with lot of retain/release operations.
