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Hello,<br>
<br>
<div class="moz-cite-prefix">On 3/25/13 9:23 AM, Miguel Baptista
wrote:<br>
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<blockquote cite="mid:51500967.60900@uninett.no" type="cite">
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Hello,<br>
<br>
I have been doing some tests with kamailio and IPv6. <br>
<br>
My initial setup was IPv6 only and now am I extending it to a
dual-stack environment. Well, and now I am starting to face some
(interesting) challenges.<br>
<br>
So, the first step in the dual-stack environment was to install
RTP Proxy and configured kamailio to use it. With this setup, the
UAs locally registered were able to communicate with each-other no
matter with address family (IPv4/IPv6) they were using. So far so
good.<br>
<br>
But now I want to extend my tests a bit more ... I want to
communicate with the "outside world" (using ENUM and domain based
SIP URIs). Do I have a way to know if the "destination" is IPv4 or
IPv6? Because I need that information in order to properly bridge
the calls on rtpproxy. <br>
<br>
I tried to use the onsend_route but it didn't work. I mean, I am
able to know if the "next-hop" is IPv6 or IPv4 but it seems that
it is "too late" to use rtpproxy. BTW ... I am assuming that if
the "next-hop" is IPv6 then the final user agent will also be IPv6
(the same for IPv4) <br>
<br>
Should I use some other approach? For example, failure route
instead? <br>
Does anyone have a similiar setup? How are you solving this issue?<br>
</blockquote>
I see few options here:<br>
<br>
- use two outbound proxies, one for IPv4 and one for IPv6 -- from
your main proxy you can do parallel forking to the two edge proxies,
one of the branches will fail if no device/server is listening on
that protocol (or it will be dropped in onsend_route if after dns is
not the expected IP version)<br>
- use lua or other embedded language to do dns lookup from config
and decide in branch route what to do. Alternative is to execute
external script or some web service<br>
- export to the config the internal dns lookup function so it will
be done on demand and detect outgoing IP layer version (this
requires c coding, perhaps not much -- preferable solution, because
will remove it from my to-do)<br>
<blockquote cite="mid:51500967.60900@uninett.no" type="cite">
</blockquote>
Cheers,<br>
Daniel<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla - <a class="moz-txt-link-freetext" href="http://www.asipto.com">http://www.asipto.com</a>
<a class="moz-txt-link-freetext" href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a class="moz-txt-link-freetext" href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a>
Kamailio World Conference, April 16-17, 2013, Berlin
- <a class="moz-txt-link-freetext" href="http://conference.kamailio.com">http://conference.kamailio.com</a> -</pre>
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