xhost package not compiled for IPv6

[cygwin]

Thanks for your suggestion of disabling IPv6, but the purpose of the 
whole exercise was to use IPv6 specifically using fully routed IPv6 
production network, not just localhost.

Jon TURNEY wrote:
> On 04/08/2009 22:16, cygwin wrote:
>> Currently, setup-1.7 installs a version of xhost (1.0.2-1) that is not
>> compiled properly for IPv6 protocol support.
>> When querying against an IPv6 X server IPv6 addresses are not 
>> recognized.
>> The fix for this is to simply rebuild the xhost package.
>
> Thanks for the bug report.
>
>> However, to get it to work at all with the Cygwin/X server, you have to
>> be using IPv4 transport, as IPv6 support seems broken. The server
>> listens on IPv6 addresses ok and recognizes incoming connections, but
>> then it just hangs. Has anyone diagnosed this further? I believe the
>> problem is in accept() system call.
>
> "The server listens on IPv6 addresses ok and recognizes incoming 
> connections, but then the client just hangs.  The server logs 
> "_XSERVTransSocketINETAccept: accept() failed"
>
> Yes, I was able to reproduce this by installing IPV6 and setting 
> DISPLAY=localhost:0.0, as a IPv6 connection seems to be used first.  
> From a quick debugging session it looks like the IPv6 socket 
> connection is really made (shown by netstat --p tcpv6 -a -b -n), but 
> that accept() in the server returns -1, which is very odd.
>
> You can workaround this problem by setting DISPLAY=:0.0 (which will 
> use a unix domain socket transport) or by starting the X server with 
> the '-nolisten inet6' argument added.
>


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