On Thu, Sep 29, 2016 at 01:53:14PM +0530, Infinicalls Infinicalls wrote:
> > You can either figure out which host was used to register by looking at
> > the socket value in the location table (using sqlops/avp_db_query) and
> > send the INVITE to the other host if socket doesn't contain a local
> > ipadress (by simply setting $rd to the other host and setting $du to
> > null)
>
> The socket value I get here is the internal IP only. For eg.
> 10.0.0.4:5060. Can you tell me how do I get the static IP here? I am
> behind NAT and use rtpproxy and advertised it.
In that case there is no direct way to get the external ip as far as I
know. As far as location is concerned that information is lost. You
might want to look into the Path module to store information about the
REGISTER (you might have to fake a Path header before save from
available info during the REGISTER).
> >or just wait for a failure route (which adds a delay) to trigger
> > and send the invite to the other host (again setting $du to null and $rd
> > to the other host).
>
> # uncomment the following lines if you want to redirect the failed
> # calls to a different new destination
> ## if (t_check_status("486|408")) {
> ## sethostport("MySecondIP:5061");
> ## append_branch();
> ## # do not set the missed call flag again
> ## t_relay();
> ##}
>
> Is this sufficient? In my case, if calls are only sent to the second
> IP, how do I add a mesh of servers (I have 5 of them now). Will that
> add more delay time? Any idea? Thanks.
It is the correct idea, but it might be a little bit fragile. There
might be no response (in which case you get a local generated 408), but
if a device is listening it might decide to send any 4/5/6xx code.
You might want to take a look at you solution though.
For example you might want to introduce edge proxies, clients connect
with those directly, but they forward the requests to a (specific or
loadbalanced) registrar (essentially the machines you have up and
running now). These proxies insert Path information about themselves in
any messages coming from the outside world (add_path_received()) , the
registrar saves the Path info:
modparam("registrar", "use_path", 1)
modparam("registrar", "path_use_received", 1)
Now any registrar looking at the shared location data knows which edge
proxy to sent the request for the enduser to directly.
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