<div dir="ltr">Hi Daniel,<div><br></div><div>would it be inappropriate to increase the branch number to the maximum possible, by default?</div><div><br></div><div>Regards,</div><div>Carlos</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Sep 30, 2014 at 5:28 AM, Daniel-Constantin Mierla <span dir="ltr"><<a href="mailto:miconda@gmail.com" target="_blank">miconda@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Hello,<div><div class="h5"><br>
<br>
<div>On 29/09/14 22:47, João Vitor Arruda
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hi folks,</div>
<div><br>
</div>
<div>I have a question related with the limited number of
branches being 12 in config.h</div>
<div><span style="white-space:pre-wrap"> </span>#define
MAX_BRANCHES 12 /*!< maximum number of
branches per transaction */</div>
<div><br>
</div>
<div>I am trying to implement a Call Group that consists in
trying each member of the group (that can result in a parallel
forking when lookup() is used) in sequence (similar to serial
forking).</div>
<div><br>
</div>
<div>Currently I have written code that is similar to the one
described here:</div>
<div><br>
</div>
<div> <a href="http://www.kamailio.org/dokuwiki/dokuphp/tutorials:avpops#serial_forking" target="_blank">http://www.kamailio.org/dokuwiki/dokuphp/tutorials:avpops#serial_forking</a></div>
<div><br>
</div>
<div>The only difference is that for each member I call lookup()
and then in the failure_route(), I pull the next member from
the stack and call lookup() again. The code works fine when
used for groups with less than 12 members. However, call
groups with 12 or more members fails as I can never reach
remaining extensions once MAX_BRANCHES limit is reached.</div>
<div><br>
</div>
<div>I've tried another approach using the functions described
here:</div>
<div><br>
</div>
<div> <a href="http://kamailio.org/docs/modules/4.1.x/modules/tm.html#tm.serial_forking" target="_blank">http://kamailio.org/docs/modules/4.1.x/modules/tm.html#tm.serial_forking</a></div>
<div><br>
</div>
<div>but it too uses a new branch for every group member until
the 12 limit is reached out.</div>
<div><br>
</div>
<div>I also tried to use the functions "remove_branch(index)"
and "clear_branches()" (both of which are poorly documented.
In fact the only reference I ever found for these functions
was here: <a href="http://www.kamailio.org/wiki/features/new-in-3.2.x#functions" target="_blank">http://www.kamailio.org/wiki/features/new-in-3.2.x#functions</a>).
Unfortunately, I wasn't able to prevent the MAX_BRANCHES limit
from being reached.</div>
<div><br>
</div>
<div>Ultimately, my goal is to have a limitless Call Group. Do
you have any suggestions? (other than increasing the hard
coded MAX_BRANCHES limit)</div>
</div>
</blockquote></div></div>
the easiest is probably recompiling with more branches. There was
someone saying that he is going to submit a patch on making the
number of branches more dynamic, but I haven't seen it back.<br>
<br>
From routing point of view, you can try a workaround with:<br>
- append 11 branches to the same sip address (see append_branch()
function) and relay<br>
- be sure you allow traffic from server itself<br>
- now you get 12 INVITE coming back to kamailio, so you get 12
INVITE requests and you can set 12 different destinations for each,
ending up with 144 over-all branches in the group call<br>
- if you need more, you can loop back again one or more of those
INVITE requests with branches pointing to same SIP address<br>
<br>
Cheers,<br>
Daniel<span class="HOEnZb"><font color="#888888"><br>
<pre cols="72">--
Daniel-Constantin Mierla
<a href="http://twitter.com/#!/miconda" target="_blank">http://twitter.com/#!/miconda</a> - <a href="http://www.linkedin.com/in/miconda" target="_blank">http://www.linkedin.com/in/miconda</a></pre>
</font></span></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr">Carlos<div><a href="http://caruizdiaz.com" target="_blank">http://caruizdiaz.com</a></div></div>
</div>