Re: [reSIProcate] resip, ares, and IPv6

[Byron Campen <bcampen@xxxxxxxxxxxx>]

        I think IPv6 support was a big reason, but I was not involved at the 
time.

Byron

> OK, sounds reasonable.
> 
> Does anyone recall why resip forked ares to begin with? What am I losing
> by switching over to c-ares?
> 
> 
> 
> On 11-05-11 11:24 AM, Adam Roach wrote:
>> To be clear, Brad Spencer actually took the effort to add conditional
>> code to resip so that it can use c-ares. This was back in 2008 (although
>> it looks like Byron did some fix-up earlier this year), so there might
>> be some slight interface drift, but it shouldn't be major work to get
>> things to work with the most recent c-ares library.
>> 
>> If you're using the Makefile-based build system, you simply add
>> "--with-resolver=c-ares" to the ./configure script (or find and set the
>> corresponding option when you run the script). I'm not certain if
>> there's any support in the Visual Studio projects, but the basic idea is
>> that you need to:
>> 
>>  1. Make sure USE_CARES is defined
>>  2. Make sure USE_ARES is *not* defined
>>  3. Make sure the c-ares headers and libraries are part of your build
>>     and link setup
>>  4. Make sure resip-ares headers and libraries are *not* part of your
>>     build and link setup
>> 
>> /a
>> 
>> On 5/11/11 10:08 AM, Byron Campen wrote:
>>>    The ares code in resip is a fork of the original (and defunct)
>>> ares, as I understand it. c-ares is also a fork of the original ares
>>> project, and there was some work on resip a while back to make it
>>> compatible with c-ares 1.6. I am not sure how easy it would be to
>>> rebase our resip-ares code on the latest c-ares, but it is probably a
>>> good thing to do.
>>> 
>>> Best regards,
>>> Byron Campen
>>> 
>>>> I haven't tried it, no ..
>>>> 
>>>> Though I did notice on the c-ares page that IPv6 support was recently
>>>> added.
>>>> 
>>>> I'm kind of new to this area, what is the history around ares vs. c-ares
>>>> anyways? Is c-ares a fork? Do you think it would be easily integratable
>>>> with resip?
>>>> 
>>>> And what happened to vanilla ares? I can't find a webpage anywhere..
>>>> 
>>>> 
>>>> On 11-05-10 08:53 PM, Byron Campen wrote:
>>>>>    Have you tried with c-ares? I know that you guys need the
>>>>> modifications in contrib/ares, but maybe we can patch up the most
>>>>> recent c-ares to suit your needs.
>>>>> 
>>>>> Best regards,
>>>>> Byron Campen
>>>>> 
>>>>>> Hello,
>>>>>> 
>>>>>> I recently found a problem with our version of ares which is used by
>>>>>> resip. I'll try to explain.
>>>>>> 
>>>>>> I am working on IPv6 testcases. One of my testcases involves switching
>>>>>> off IPv4 stack support and going to IPv6 only configuration.
>>>>>> 
>>>>>> When I do this, I notice that ares does not recognize any DNS servers
>>>>>> which are configured for IPv6.
>>>>>> 
>>>>>> After a lengthy debugging session, I traced the fault to a method
>>>>>> "init_by_default" inside of ares_init.c. In that method, the technique
>>>>>> of calling "GetNetworkParams" is used in order to query windows for
>>>>>> its
>>>>>> DNS configuration. But, as the following website suggests:
>>>>>> 
>>>>>> http://www.winsocketdotnetworkprogramming.com/winsock2programming/winsock2advancediphelperfunction13.html
>>>>>> 
>>>>>> 
>>>>>> The GetNetworkParams probably does not return IPv6 related
>>>>>> configuration
>>>>>> information. Instead, they recommend using GetAdaptersAddresses()
>>>>>> instead.
>>>>>> 
>>>>>> So, I'm wondering if anyone else has found this problem, if there is a
>>>>>> patch that was submitted, or .. if there is just a newer version of
>>>>>> ares
>>>>>> somewhere that we need to update to?
>>>>>> 
>>>>>> Awaiting your advice,
>>>>>> -- 
>>>>>> 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
>>>>>> _______________________________________________
>>>>>> resiprocate-devel mailing list
>>>>>> resiprocate-devel@xxxxxxxxxxxxxxx
>>>>>> https://list.resiprocate.org/mailman/listinfo/resiprocate-devel
>>>> -- 
>>>> 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
>>> _______________________________________________
>>> resiprocate-devel mailing list
>>> resiprocate-devel@xxxxxxxxxxxxxxx
>>> https://list.resiprocate.org/mailman/listinfo/resiprocate-devel
>> 
>> 
> 
> -- 
> 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