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Graham Edgecombe ed6ad17caa Fix ByteBufUtil.getBytes() incorrectly sharing the array in some cases (#10529)
Motivation:

If ByteBufUtil.getBytes() is called with copy=false, it does not
correctly check that the underlying array can be shared in some cases.

In particular:

* It does not check that the arrayOffset() is zero. This causes it to
  incorrectly return the underlying array if the other conditions are
  met. The returned array will be longer than requested, with additional
  unwanted bytes at its start.

* It assumes that the capacity() of the ByteBuf is equal to the backing
  array length. This is not true for some types of ByteBuf, such as
  PooledHeapByteBuf. This causes it to incorrectly return the underlying
  array if the other conditions are met. The returned array will be
  longer than requested, with additional unwanted bytes at its end.

Modifications:

This commit fixes the two bugs by:

* Checking that the arrayOffset() is zero before returning the
  underlying array.

* Comparing the requested length to the underlying array's length,
  rather than the ByteBuf's capacity, before returning the underlying
  array.

This commit also adds a series of test cases for ByteBufUtil.getBytes().

Result:

ByteBufUtil.getBytes() now correctly checks whether the underlying array
can be shared or not.

The test cases will ensure the bug is not reintroduced in the future.
2020-09-04 13:15:56 +02:00
.github Change the netty.io homepage scheme(http -> https) (#9344) 2019-07-09 21:10:14 +02:00
.mvn Use latest maven release (#9820) 2019-11-27 14:45:48 +01:00
all Include aarch64 packages in netty-bom (#10292) 2020-05-15 10:34:35 +02:00
bom Include aarch64 packages in netty-bom (#10292) 2020-05-15 10:34:35 +02:00
buffer Fix ByteBufUtil.getBytes() incorrectly sharing the array in some cases (#10529) 2020-09-04 13:15:56 +02:00
codec Remove javassist dependency (#10514) 2020-08-31 09:02:28 +02:00
codec-dns Workaround Android bug that cause AbstractDnsRecord to throw when the name is only a ROOT label (#10039) 2020-02-18 15:11:06 +01:00
codec-haproxy Add support for HAProxyMessageEncoder (#10175) 2020-04-16 11:53:43 +02:00
codec-http Use ByteBuf#isAccessible() in more places (#10506) 2020-08-28 09:22:34 +02:00
codec-http2 Http2ConnectionHandlerBuilder: make initialSettings() public (#10526) 2020-09-02 21:13:14 +02:00
codec-memcache Remove the intermediate List from ByteToMessageDecoder (and sub-class… (#8626) 2019-12-16 21:00:32 +01:00
codec-mqtt Improve MqttMessageType::valueOf cost (#10400) 2020-08-31 10:32:48 +02:00
codec-redis Remove the intermediate List from ByteToMessageDecoder (and sub-class… (#8626) 2019-12-16 21:00:32 +01:00
codec-smtp add AUTH & EMPTY to SmtpCommand (#9999) 2020-02-07 14:30:16 +01:00
codec-socks Remove the intermediate List from ByteToMessageDecoder (and sub-class… (#8626) 2019-12-16 21:00:32 +01:00
codec-stomp Fix allocate additional buffer for encoding stompFrame without readab… (#10150) 2020-03-31 16:03:16 +02:00
codec-xml Remove the intermediate List from ByteToMessageDecoder (and sub-class… (#8626) 2019-12-16 21:00:32 +01:00
common Add ipv4AddressToInt(Inet4Address) in NetUtils (#10500) 2020-08-31 09:13:32 +02:00
dev-tools Update version number to start working on Netty 5 2018-11-20 15:49:57 +01:00
docker Update GraalVM with JDK 8 and add GraalVM with JDK 11 (#10333) 2020-06-02 11:53:18 +02:00
example MQTT5 support for netty-codec-mqtt (#10483) 2020-08-31 10:31:57 +02:00
handler Revert "Support session cache for client and server when using native SSLEngine implementation (#10331)" 2020-09-03 08:33:22 +02:00
handler-proxy Ensure WebSocket*Handshaker can not corrupt pipeline when HttpProxyHa… (#10103) 2020-03-16 11:45:25 +01:00
license Introduce MacOSDnsServerAddressStreamProvider which correctly detect all nameserver configuration on MacOS (#9161) 2019-10-28 15:03:40 +01:00
microbench Improve MqttMessageType::valueOf cost (#10400) 2020-08-31 10:32:48 +02:00
resolver Reduce scope of synchronized block introduced in 5114588cba (#10013) 2020-02-10 19:31:17 +01:00
resolver-dns Use all configured nameservers when using DnsNameResolver in all cases (#10503) 2020-08-31 09:12:40 +02:00
resolver-dns-native-macos Use MacOSDnsServerAddressStreamProvider when on the classpath and we … (#10079) 2020-03-06 11:42:19 +01:00
tarball Introduce MacOSDnsServerAddressStreamProvider which correctly detect all nameserver configuration on MacOS (#9161) 2019-10-28 15:03:40 +01:00
testsuite Adjust testsuite to pass on JDK15+ (#10511) 2020-08-31 09:05:24 +02:00
testsuite-autobahn Cleanup usage of Channel*Handler (#9959) 2020-01-20 17:47:17 -08:00
testsuite-http2 Ensure the DefaultChannelHandlerContext is unlinked once removed (#9970) 2020-03-01 08:13:33 +01:00
testsuite-native-image Rename SimpleChannelInboundHandler.channelRead0() to messageReceived() (#8819) 2019-11-01 07:23:07 +01:00
testsuite-osgi Use lambdas whenever possible (#9979) 2020-01-30 09:28:24 +01:00
testsuite-shading Allow to build on powerpc 2019-09-13 22:21:36 +02:00
transport Create a stackless ClosedChannelException to reduce overhead when the… (#10523) 2020-09-01 15:47:10 +02:00
transport-blockhound-tests When BlockHound is installed, do not report GlobalEventExecutor/SingleThreadEventExecutor#takeTask as blocking call. (#10020) 2020-08-12 09:15:10 +02:00
transport-native-epoll Fix #10434 OutOfDirectMemoryError causes cpu load too high and socket is full (#10457) 2020-08-13 10:34:11 +02:00
transport-native-kqueue Remove unused classes (#10476) 2020-08-13 11:31:41 +02:00
transport-native-unix-common Remove unused classes (#10476) 2020-08-13 11:31:41 +02:00
transport-native-unix-common-tests Rename SimpleChannelInboundHandler.channelRead0() to messageReceived() (#8819) 2019-11-01 07:23:07 +01:00
transport-sctp Replace the type of fragments field with IntObjectMap in SctpMessageCompletionHandler (#10057) 2020-02-24 20:02:35 +01:00
transport-udt/lib/bin/lib/x86_64-MacOSX-gpp/jni Replace reflection usage with MethodHandles when performance matters (#10097) 2020-03-11 21:04:40 +01:00
.fbprefs Updated Find Bugs configuration 2009-03-04 10:33:09 +00:00
.gitattributes Include mvn wrapper to make setup of development env easier 2018-01-26 08:13:17 +01:00
.gitignore Ignore .shelf/ folder generated by IntelliJ IDEA (#10445) 2020-08-03 07:52:18 +02:00
.lgtm.yml Enables lgtm.com to process this project and create a CodeQL database 2020-01-20 19:22:49 +01:00
CONTRIBUTING.md Change the netty.io homepage scheme(http -> https) (#9344) 2019-07-09 21:10:14 +02:00
LICENSE.txt Relicensed to Apache License v2 2009-08-28 07:15:49 +00:00
mvnw Include mvn wrapper to make setup of development env easier 2018-01-26 08:13:17 +01:00
mvnw.cmd Include mvn wrapper to make setup of development env easier 2018-01-26 08:13:17 +01:00
NOTICE.txt Introduce MacOSDnsServerAddressStreamProvider which correctly detect all nameserver configuration on MacOS (#9161) 2019-10-28 15:03:40 +01:00
pom.xml Remove javassist dependency (#10514) 2020-08-31 09:02:28 +02:00
README.md Change the netty.io homepage scheme(http -> https) (#9344) 2019-07-09 21:10:14 +02:00
run-example.sh Add DNS client examples for run-example.sh (#10283) 2020-05-14 12:10:48 +02:00

Netty Project

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.

How to build

For the detailed information about building and developing Netty, please visit the developer guide. This page only gives very basic information.

You require the following to build Netty:

Note that this is build-time requirement. JDK 5 (for 3.x) or 6 (for 4.0+) is enough to run your Netty-based application.

Branches to look

Development of all versions takes place in each branch whose name is identical to <majorVersion>.<minorVersion>. For example, the development of 3.9 and 4.0 resides in the branch '3.9' and the branch '4.0' respectively.

Usage with JDK 9

Netty can be used in modular JDK9 applications as a collection of automatic modules. The module names follow the reverse-DNS style, and are derived from subproject names rather than root packages due to historical reasons. They are listed below:

  • io.netty.all
  • io.netty.buffer
  • io.netty.codec
  • io.netty.codec.dns
  • io.netty.codec.haproxy
  • io.netty.codec.http
  • io.netty.codec.http2
  • io.netty.codec.memcache
  • io.netty.codec.mqtt
  • io.netty.codec.redis
  • io.netty.codec.smtp
  • io.netty.codec.socks
  • io.netty.codec.stomp
  • io.netty.codec.xml
  • io.netty.common
  • io.netty.handler
  • io.netty.handler.proxy
  • io.netty.resolver
  • io.netty.resolver.dns
  • io.netty.transport
  • io.netty.transport.epoll (native omitted - reserved keyword in Java)
  • io.netty.transport.kqueue (native omitted - reserved keyword in Java)
  • io.netty.transport.unix.common (native omitted - reserved keyword in Java)
  • io.netty.transport.rxtx
  • io.netty.transport.sctp
  • io.netty.transport.udt

Automatic modules do not provide any means to declare dependencies, so you need to list each used module separately in your module-info file.