[OpenSIPS-Users] Feature request - pseudo-variable for destination IP address

[rob.dyck at telus.net]

Unfortunately the address of the interface where the request was receeived is private. I am using 1 to 1 NAT.

----- Original Message -----
From: "Ovidiu Sas" <osas at voipembedded.com>
To: "OpenSIPS users mailling list" <users at lists.opensips.org>
Sent: Thursday, June 27, 2019 3:31:34 PM
Subject: Re: [OpenSIPS-Users] Feature request - pseudo-variable for destination IP address

Check out the $Ri pvar:
https://www.opensips.org/Documentation/Script-CoreVar-3-0#toc78

-ovidiu

On Thu, Jun 27, 2019 at 6:23 PM rob.dyck at telus.net <rob.dyck at telus.net> wrote:
>
> I was looking for something similar to the $si PV but for the destination IP address. Either it doesn't exist or I am blind. I can't find things in the refrigerator either.
>
> The motivation.
>
> I have a working instance of Opensips with a basic residential configuration. I extended it to allow calling UAs on the LAN from the outside. It is a typical residential LAN without a fixed IP address. Dynamic DNS is working for me. I read the tutorial about Opensips behind NAT. Following the recommendations there I was able to setup rtpproxy, the advertised address and an alias for my Opensips. Initial testing using a softphone on a laptop using either WiFi or a mobile phone tethered to the laptop worked well. However it seems that some UAs will not accept a domain name in the SDP connection. The UAs that failed could be made to work by coding in an IP address. This is not a satisfactory solution because the router's address may chaange. There is probably some convoluted way to import the needed address into the script.  A pseudo-variable representing the destination IP address of the received INVITE or 200 OK could then be passed as the advertised address to the rtpproxy module.
>
> Thank you for having a look.
> Rob
>
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VoIP Embedded, Inc.
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