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<div id="divRplyFwdMsg" dir="dir="ltr""><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Van:</b> Users <users-bounces@lists.opensips.org> namens Vitalii Aleksandrov <vitalik.voip@gmail.com><br>
<b>Verzonden:</b> donderdag, juli 18, 2019 4:56 PM<br>
<b>Aan:</b> users@lists.opensips.org<br>
<b>Onderwerp:</b> Re: [OpenSIPS-Users] Feature request - pseudo-variable for destination IP address
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Hi,<br>
<br>
Original question was about different thing but the destination IP of a <br>
request or reply is not hard to get. I wrote a small module which <br>
extracts the destination uri from ru (du) for requests and from via for <br>
replies, makes a dns resolve if it's a domain name and then detects the <br>
outgoing interface of opensips and exports it as a PV to config. The <br>
goal was to configure rtpengine's direction to bridge between different <br>
interfaces. Adding just a few more lines of code will export the <br>
destination IP as a PV. Since I use dns cache module resolve happens <br>
only once and when t_relay() (tm module) searches for a destination it <br>
just reuses previously resolved values from cache. I can share it if <br>
anybody needs it.<br>
> As far as I know, the equivalent variable to $si on the destination side is either $dd, which may not always be set, or $rd. Those are not guaranteed to be IP addresses, however. If DNS is being used, I don't believe OpenSIPS provides the results of the DNS
lookup to the script in any variable, so I don't think there is a way to find the actual IP aside from doing your own DNS lookup (or possibly using the dns_cache module and snooping the cache, but I have had issues with this module in the past.)<br>
><br>
> Ben Newlin<br>
><br>
> On 6/28/19, 10:16 AM, "Users on behalf of rob.dyck@telus.net" <users-bounces@lists.opensips.org on behalf of rob.dyck@telus.net> wrote:<br>
><br>
> Unfortunately the address of the interface where the request was receeived is private. I am using 1 to 1 NAT.<br>
> <br>
> ----- Original Message -----<br>
> From: "Ovidiu Sas" <osas@voipembedded.com><br>
> To: "OpenSIPS users mailling list" <users@lists.opensips.org><br>
> Sent: Thursday, June 27, 2019 3:31:34 PM<br>
> Subject: Re: [OpenSIPS-Users] Feature request - pseudo-variable for destination IP address<br>
> <br>
> Check out the $Ri pvar:<br>
> https://www.opensips.org/Documentation/Script-CoreVar-3-0#toc78<br>
> <br>
> -ovidiu<br>
> <br>
> On Thu, Jun 27, 2019 at 6:23 PM rob.dyck@telus.net <rob.dyck@telus.net> wrote:<br>
> ><br>
> > 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.<br>
> ><br>
> > The motivation.<br>
> ><br>
> > 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.<br>
> ><br>
> > Thank you for having a look.<br>
> > Rob<br>
> ><br>
> > _______________________________________________<br>
> > Users mailing list<br>
> > Users@lists.opensips.org<br>
> > http://lists.opensips.org/cgi-bin/mailman/listinfo/users<br>
> <br>
> <br>
> <br>
> --<br>
> VoIP Embedded, Inc.<br>
> http://www.voipembedded.com<br>
> <br>
> _______________________________________________<br>
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> <br>
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> <br>
><br>
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