Automatic-Module-Name entry provides a stable JDK9 module name, when Netty is used in a modular JDK9 applications. More info: http://blog.joda.org/2017/05/java-se-9-jpms-automatic-modules.html
When Netty migrates to JDK9 in the future, the entry can be replaced by actual module-info descriptor.
Modification:
The POM-s are configured to put the correct module names to the manifest.
Result:
Fixes#7218.
Motivation: Today when Netty encounters a general error while decoding
it treats this as a decoder exception. However, for fatal causes this
should not be treated as such, instead the fatal error should be carried
up the stack without the callee having to unwind causes. This was
probably done for byte to byte message decoder but is now done for all
decoders.
Modifications: Instead of translating any error to a decoder exception,
we let those unwind out the stack (note that finally blocks still
execute) except in places where an event needs to fire where we fire
with the error instead of wrapping in a decoder exception.
Result: Fatal errors will not be treated as innocent decoder exceptions.
Motivation:
According to SOCKS 5 spec, dstPort = 0 is a valid value in case of UDP ASSOCIATE.
Modifications:
- Allow 0 as port.
- Add unit tests.
Result:
Fixes [#7156].
Motivation:
In the SocksCmdRequest and SocksCmdResponse constructors a host param converts from IDN to ascii compatible form regardless address type.
Modifications:
Use `IDN#toASCII` only for `DOMAIN` address type.
Result:
More correct host handling in socks commands.
Motivation:
1. `ByteBuf` contains methods to writing `CharSequence` which optimized for UTF-8 and ASCII encodings. We can also apply optimization for ISO-8859-1.
2. In many places appropriate methods are not used.
Modifications:
1. Apply optimization for ISO-8859-1 encoding in the `ByteBuf#setCharSequence` realizations.
2. Apply appropriate methods for writing `CharSequences` into buffers.
Result:
Reduce overhead from string-to-bytes conversion.
Motivation:
1. Internal class `SocksCommonUtils` contains a method `intToIp` that also exists in the `NetUtil`.
2. A `SocksCommonUtils#ipv6toCompressedForm` is never used.
Modifications:
1. Replace `intToIp` method usage with `NetUtil#intToIpAddress`.
2. Remove unused methods from `SocksCommonUtils`.
Result:
Less code for supports.
Motivation:
Some classes have fields which can be local.
Modifications:
Convert fields to the local variable when possible.
Result:
Clean up. More chances for young generation or scalar replacement.
Motivation:
Currently Netty does not wrap socket connect, bind, or accept
operations in doPrivileged blocks. Nor does it wrap cases where a dns
lookup might happen.
This prevents an application utilizing the SecurityManager from
isolating SocketPermissions to Netty.
Modifications:
I have introduced a class (SocketUtils) that wraps operations
requiring SocketPermissions in doPrivileged blocks.
Result:
A user of Netty can grant SocketPermissions explicitly to the Netty
jar, without granting it to the rest of their application.
