c-ares + IPv6 problem

Hello,

I've been chasing an issue from the resiprocate mailing list, which it
turns out comes down to c-ares (or perhaps my use of it).

I'll try to summarize the problem.

I'm testing functionality of our product over IPv6 only networks; one of
the issues we have is that we're having trouble sending DNS requests
over IPv6 (note, parsing DNS results with IPv6 content is OK).

My setup is like this:
- Windows 7, with IPv4 stack turned off
- IPv6 stack configured with static DNS server

What I notice, is that c-ares does not find the statically configured
IPv6 DNS server and therefore our application cannot send it a DNS
request over IPv6.

My feeling is that this is related somehow to the initialization of
c-ares, and how it obtains the configuration from Windows. Can anyone
help me to track down the problem? I'm currently using the latest
(stable?) release downloaded directly from the website.

Thanks in advance,

-- 
David Stuart, CounterPath
Email: dstuart (at) counterpath (dot) com
Phone: (613) 254-8886 x2234  Web: http://www.counterpath.com/
Address: 310 - 350 Terry Fox Drive, Kanata Ontario, K2K 2P5