RFR:8194298 Add support for per Socket configuration of TCP keepalive

[Alan Bateman]

On 14/04/2018 08:09, Alan Bateman wrote:
> :
>
> Can you update SocketChannel/SocketOptionTests.java to ensure that 
> SocketChannel is test? We also need to ensure that the new options 
> don't show up in the supportedOptions returned by the channels that 
> don't support these new options.
Just on this point, I think this needs work in ExtendedSocketOptions so 
that the extended options are organized by socket type (STREAM or 
DGRAM). This will become a lot more obvious once you add tests for 
SocketChannel as its implementation will need a change to pick up the 
extended options for STREAM sockets. It will also avoid the filtering in 
PlainDatagramSocketImpl that you've added to work around the issue there.

-Alan