6989190: SO_SNDBUF/SO_RCVBUF limits should only be checked when setsockopt fails (sol)

[Michael McMahon]

Looks fine.

Thanks,
Michael.

Alan Bateman wrote:
>
> I need a reviewer for a small change to the networking code. On 
> Solaris, the SO_SNDBUF/SO_RCVBUF parameters are clamped by the values 
> of the tcp_max_buf and udp_max_buf parameters. Unfortunately the code 
> in net_util_md.c has been using a private/unsupported interface that 
> no longer exists in Solaris 11. That one is going to take a while to 
> sort out so I'd like to propose a short term solution which is to 
> simply change the fallback values to the out the box defaults (1MB for 
> TCP, 2MB for UDP). That will eliminate the test failures for all cases 
> except where ndd has been used to change the system defaults (probably 
> rare). While I was there, I changed the implementation to just attempt 
> to set the socket options before clamping. The rational is that it 
> should be rare that applications attempt to set these socket options 
> to values larger than the system limit anyway.
>
> One other change included in this webrev is a small change to the 
> newly added ThrowUnknownHostExceptionWithGaiError to address a few 
> compiler warnings.
>
> The webrev the changes is here:
>  http://cr.openjdk.java.net/~alanb/6989190/webrev/
>
> Thanks,
> Alan.
>
>