Hi Shaahin,
Why not simply using the Dynamic Routing module :
http://www.opensips.org/html/docs/modules/1.8.x/drouting.html
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
On 08/30/2012 03:07 PM, Shaahin Madani wrote:
Greetings,
In my OpenSIPS server, when I receive an INVITE requests, I need to
(1) consult an external database to get a list of gateways, and (2)
send the request to those gateways, in order, starting from the first
and trying the next only if the current one fails (e.g. irresponsive,
offline, busy, etc).
I understand that forwarding calls to a certain gateway can be
achieved using the rewritehostport(…)function; and that
prefix-/caller-/group-/time-/priority-based dynamic routing can be
addressed using the DROUTINGmodule. However, in my system what
actually is “dynamic” is the gateway list itself, which is therefore
not a subset of the dr_gatewaystable. In fact, OpenSIPS has no idea
about the list of gateways due to the complex business-logic involved.
The dynamic gateway list, nevertheless, needs to be treated identical
to an ordinary one, i.e. prefix, time and priority of gateways must be
considered.
Solving this problem, I assume, requires either writing a whole new
DROUTINGmodule, which wraps the necessary business-logic and consults
the external database; or wrapping the business-logic in a Perl script
that is called from the routing script (opensips.cfg). Now, there are
two issues that I would like to know your expert opinion about:
1. Is my solution, i.e. using the Perl script to wrap the business
logic and queries to the external database, the best possible way to
do this?
2. As the list of gateways is dynamic, is there any way to leverage
the facilities offered by the DROUTINGmodule? Specifically, can I
somehow get the list of gateways from the Perl script and pass it to
the DROUTINGmodule for prefix-/time-/priority-based routing, or
probing, purposes?
Regards,
Shaahin Madani
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