nio channels with IPv6 on Windows XP

Alan Bateman Alan.Bateman at Sun.COM
Mon Dec 14 00:47:37 PST 2009

Salter, Thomas A wrote:
> It seems that AsynchronousServerSocketChannel does not work with IPv6 
> sockets on Windows XP (the combination that invokes the TwoStack 
> implementations).  Is this a known restriction or is it intended to 
> work?  I can certainly understand why you might not want to support it.
> I tested on b77.  My test runs on Windows 7 but fails on Windows XP.  
> It fails on the bind because an IPv6 address is passed to AF_INET socket.
As Chris said, you need Vista or newer because that's the first release 
of Windows with the new stack that supports dual-stack sockets (ie: 
interoperability with IPv4 and support for IPv4-mapped IPv6 addresses). 
The IPv6 stack that came in one of the Windows XP service packs was a 
separate stack and lacks IPv4 interoperability.


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